Index: head/sys/conf/files =================================================================== --- head/sys/conf/files (revision 352656) +++ head/sys/conf/files (revision 352657) @@ -1,4952 +1,4953 @@ # $FreeBSD$ # # The long compile-with and dependency lines are required because of # limitations in config: backslash-newline doesn't work in strings, and # dependency lines other than the first are silently ignored. # acpi_quirks.h optional acpi \ dependency "$S/tools/acpi_quirks2h.awk $S/dev/acpica/acpi_quirks" \ compile-with "${AWK} -f $S/tools/acpi_quirks2h.awk $S/dev/acpica/acpi_quirks" \ no-obj no-implicit-rule before-depend \ clean "acpi_quirks.h" bhnd_nvram_map.h optional bhnd \ dependency "$S/dev/bhnd/tools/nvram_map_gen.sh $S/dev/bhnd/tools/nvram_map_gen.awk $S/dev/bhnd/nvram/nvram_map" \ compile-with "sh $S/dev/bhnd/tools/nvram_map_gen.sh $S/dev/bhnd/nvram/nvram_map -h" \ no-obj no-implicit-rule before-depend \ clean "bhnd_nvram_map.h" bhnd_nvram_map_data.h optional bhnd \ dependency "$S/dev/bhnd/tools/nvram_map_gen.sh $S/dev/bhnd/tools/nvram_map_gen.awk $S/dev/bhnd/nvram/nvram_map" \ compile-with "sh $S/dev/bhnd/tools/nvram_map_gen.sh $S/dev/bhnd/nvram/nvram_map -d" \ no-obj no-implicit-rule before-depend \ clean "bhnd_nvram_map_data.h" fdt_static_dtb.h optional fdt fdt_dtb_static \ compile-with "sh -c 'MACHINE=${MACHINE} $S/tools/fdt/make_dtbh.sh ${FDT_DTS_FILE} ${.CURDIR}'" \ dependency "${FDT_DTS_FILE:T:R}.dtb" \ no-obj no-implicit-rule before-depend \ clean "fdt_static_dtb.h" feeder_eq_gen.h optional sound \ dependency "$S/tools/sound/feeder_eq_mkfilter.awk" \ compile-with "${AWK} -f $S/tools/sound/feeder_eq_mkfilter.awk -- ${FEEDER_EQ_PRESETS} > feeder_eq_gen.h" \ no-obj no-implicit-rule before-depend \ clean "feeder_eq_gen.h" feeder_rate_gen.h optional sound \ dependency "$S/tools/sound/feeder_rate_mkfilter.awk" \ compile-with "${AWK} -f $S/tools/sound/feeder_rate_mkfilter.awk -- ${FEEDER_RATE_PRESETS} > feeder_rate_gen.h" \ no-obj no-implicit-rule before-depend \ clean "feeder_rate_gen.h" snd_fxdiv_gen.h optional sound \ dependency "$S/tools/sound/snd_fxdiv_gen.awk" \ compile-with "${AWK} -f $S/tools/sound/snd_fxdiv_gen.awk -- > snd_fxdiv_gen.h" \ no-obj no-implicit-rule before-depend \ clean "snd_fxdiv_gen.h" miidevs.h optional miibus | mii \ dependency "$S/tools/miidevs2h.awk $S/dev/mii/miidevs" \ compile-with "${AWK} -f $S/tools/miidevs2h.awk $S/dev/mii/miidevs" \ no-obj no-implicit-rule before-depend \ clean "miidevs.h" pccarddevs.h standard \ dependency "$S/tools/pccarddevs2h.awk $S/dev/pccard/pccarddevs" \ compile-with "${AWK} -f $S/tools/pccarddevs2h.awk $S/dev/pccard/pccarddevs" \ no-obj no-implicit-rule before-depend \ clean "pccarddevs.h" kbdmuxmap.h optional kbdmux_dflt_keymap \ compile-with "kbdcontrol -P ${S:S/sys$/share/}/vt/keymaps -P ${S:S/sys$/share/}/syscons/keymaps -L ${KBDMUX_DFLT_KEYMAP} | sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /' > kbdmuxmap.h" \ no-obj no-implicit-rule before-depend \ clean "kbdmuxmap.h" teken_state.h optional sc | vt \ dependency "$S/teken/gensequences $S/teken/sequences" \ compile-with "${AWK} -f $S/teken/gensequences $S/teken/sequences > teken_state.h" \ no-obj no-implicit-rule before-depend \ clean "teken_state.h" ukbdmap.h optional ukbd_dflt_keymap \ compile-with "kbdcontrol -P ${S:S/sys$/share/}/vt/keymaps -P ${S:S/sys$/share/}/syscons/keymaps -L ${UKBD_DFLT_KEYMAP} | sed -e 's/^static keymap_t.* = /static keymap_t key_map = /' -e 's/^static accentmap_t.* = /static accentmap_t accent_map = /' > ukbdmap.h" \ no-obj no-implicit-rule before-depend \ clean "ukbdmap.h" usbdevs.h optional usb \ dependency "$S/tools/usbdevs2h.awk $S/dev/usb/usbdevs" \ compile-with "${AWK} -f $S/tools/usbdevs2h.awk $S/dev/usb/usbdevs -h" \ no-obj no-implicit-rule before-depend \ clean "usbdevs.h" usbdevs_data.h optional usb \ dependency "$S/tools/usbdevs2h.awk $S/dev/usb/usbdevs" \ compile-with "${AWK} -f $S/tools/usbdevs2h.awk $S/dev/usb/usbdevs -d" \ no-obj no-implicit-rule before-depend \ clean "usbdevs_data.h" sdiodevs.h optional mmccam \ dependency "$S/tools/sdiodevs2h.awk $S/dev/sdio/sdiodevs" \ compile-with "${AWK} -f $S/tools/sdiodevs2h.awk $S/dev/sdio/sdiodevs -h" \ no-obj no-implicit-rule before-depend \ clean "sdiodevs.h" sdiodevs_data.h optional mmccam \ dependency "$S/tools/sdiodevs2h.awk $S/dev/sdio/sdiodevs" \ compile-with "${AWK} -f $S/tools/sdiodevs2h.awk $S/dev/sdio/sdiodevs -d" \ no-obj no-implicit-rule before-depend \ clean "sdiodevs_data.h" cam/cam.c optional scbus cam/cam_compat.c optional scbus cam/cam_iosched.c optional scbus cam/cam_periph.c optional scbus cam/cam_queue.c optional scbus cam/cam_sim.c optional scbus cam/cam_xpt.c optional scbus cam/ata/ata_all.c optional scbus cam/ata/ata_xpt.c optional scbus cam/ata/ata_pmp.c optional scbus cam/nvme/nvme_all.c optional scbus cam/nvme/nvme_da.c optional nda | da cam/nvme/nvme_xpt.c optional scbus cam/scsi/scsi_xpt.c optional scbus cam/scsi/scsi_all.c optional scbus cam/scsi/scsi_cd.c optional cd cam/scsi/scsi_ch.c optional ch cam/ata/ata_da.c optional ada | da cam/ctl/ctl.c optional ctl cam/ctl/ctl_backend.c optional ctl cam/ctl/ctl_backend_block.c optional ctl cam/ctl/ctl_backend_ramdisk.c optional ctl cam/ctl/ctl_cmd_table.c optional ctl cam/ctl/ctl_frontend.c optional ctl cam/ctl/ctl_frontend_cam_sim.c optional ctl cam/ctl/ctl_frontend_ioctl.c optional ctl cam/ctl/ctl_frontend_iscsi.c optional ctl cfiscsi cam/ctl/ctl_ha.c optional ctl cam/ctl/ctl_scsi_all.c optional ctl cam/ctl/ctl_tpc.c optional ctl cam/ctl/ctl_tpc_local.c optional ctl cam/ctl/ctl_error.c optional ctl cam/ctl/ctl_util.c optional ctl cam/ctl/scsi_ctl.c optional ctl cam/mmc/mmc_xpt.c optional scbus mmccam cam/mmc/mmc_da.c optional scbus mmccam da cam/scsi/scsi_da.c optional da cam/scsi/scsi_pass.c optional pass cam/scsi/scsi_pt.c optional pt cam/scsi/scsi_sa.c optional sa cam/scsi/scsi_enc.c optional ses cam/scsi/scsi_enc_ses.c optional ses cam/scsi/scsi_enc_safte.c optional ses cam/scsi/scsi_sg.c optional sg cam/scsi/scsi_targ_bh.c optional targbh cam/scsi/scsi_target.c optional targ cam/scsi/smp_all.c optional scbus # shared between zfs and dtrace cddl/compat/opensolaris/kern/opensolaris.c optional zfs | dtrace compile-with "${CDDL_C}" cddl/compat/opensolaris/kern/opensolaris_cmn_err.c optional zfs | dtrace compile-with "${CDDL_C}" cddl/compat/opensolaris/kern/opensolaris_kmem.c optional zfs | dtrace compile-with "${CDDL_C}" cddl/compat/opensolaris/kern/opensolaris_misc.c optional zfs | dtrace compile-with "${CDDL_C}" cddl/compat/opensolaris/kern/opensolaris_proc.c optional zfs | dtrace compile-with "${CDDL_C}" cddl/compat/opensolaris/kern/opensolaris_sunddi.c optional zfs | dtrace compile-with "${CDDL_C}" cddl/compat/opensolaris/kern/opensolaris_taskq.c optional zfs | dtrace compile-with "${CDDL_C}" # zfs specific cddl/compat/opensolaris/kern/opensolaris_acl.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_dtrace.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_kobj.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_kstat.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_lookup.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_policy.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_string.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_sysevent.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_uio.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_vfs.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_vm.c optional zfs compile-with "${ZFS_C}" cddl/compat/opensolaris/kern/opensolaris_zone.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/acl/acl_common.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/avl/avl.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/nvpair/opensolaris_fnvpair.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/nvpair/opensolaris_nvpair.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/nvpair/opensolaris_nvpair_alloc_fixed.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/unicode/u8_textprep.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/zfs/zfeature_common.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/zfs/zfs_comutil.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/zfs/zfs_deleg.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/zfs/zfs_fletcher.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/zfs/zfs_ioctl_compat.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/zfs/zfs_namecheck.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/zfs/zfs_prop.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/zfs/zpool_prop.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/common/zfs/zprop_common.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/vnode.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/abd.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/aggsum.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/blkptr.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/bplist.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/bpobj.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/bptree.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/bqueue.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/cityhash.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf_stats.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/ddt.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/ddt_zap.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dmu.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_diff.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_object.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_objset.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_traverse.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_tx.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_zfetch.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dnode.c optional zfs compile-with "${ZFS_C}" \ warning "kernel contains CDDL licensed ZFS filesystem" cddl/contrib/opensolaris/uts/common/fs/zfs/dnode_sync.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_bookmark.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dataset.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_deadlist.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_deleg.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_destroy.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dir.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_pool.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_prop.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_userhold.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_synctask.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/gzip.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lz4.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lzjb.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/metaslab.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/multilist.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/range_tree.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/refcount.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/rrwlock.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/sa.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/sha256.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/skein_zfs.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/spa_checkpoint.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/spa_config.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/spa_errlog.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/spa_history.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/space_reftree.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/trim_map.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/txg.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/uberblock.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/unique.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_cache.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_file.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_indirect.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_indirect_births.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_indirect_mapping.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_initialize.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_label.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_mirror.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_missing.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_raidz.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_removal.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_root.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zap.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zap_leaf.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zap_micro.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zcp.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zcp_get.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zcp_global.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zcp_iter.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zcp_synctask.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfeature.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_acl.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_byteswap.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ctldir.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_debug.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_dir.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_fm.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_fuid.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_log.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_onexit.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_replay.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_rlock.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_sa.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zio_checksum.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zio_compress.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zio_inject.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zle.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zrlock.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zthr.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/os/callb.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/os/fm.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/os/list.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/os/nvpair_alloc_system.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/zmod/zmod.c optional zfs compile-with "${ZFS_C}" # zfs lua support cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lapi.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lauxlib.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lbaselib.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lbitlib.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lcode.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lcompat.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lcorolib.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lctype.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/ldebug.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/ldo.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/ldump.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lfunc.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lgc.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/llex.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lmem.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lobject.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lopcodes.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lparser.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lstate.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lstring.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lstrlib.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/ltable.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/ltablib.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/ltm.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lundump.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lvm.c optional zfs compile-with "${ZFS_C}" cddl/contrib/opensolaris/uts/common/fs/zfs/lua/lzio.c optional zfs compile-with "${ZFS_C}" # dtrace specific cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c optional dtrace compile-with "${DTRACE_C}" \ warning "kernel contains CDDL licensed DTRACE" cddl/contrib/opensolaris/uts/common/dtrace/dtrace_xoroshiro128_plus.c optional dtrace compile-with "${DTRACE_C}" cddl/dev/dtmalloc/dtmalloc.c optional dtmalloc | dtraceall compile-with "${CDDL_C}" cddl/dev/profile/profile.c optional dtrace_profile | dtraceall compile-with "${CDDL_C}" cddl/dev/sdt/sdt.c optional dtrace_sdt | dtraceall compile-with "${CDDL_C}" cddl/dev/fbt/fbt.c optional dtrace_fbt | dtraceall compile-with "${FBT_C}" cddl/dev/systrace/systrace.c optional dtrace_systrace | dtraceall compile-with "${CDDL_C}" cddl/dev/prototype.c optional dtrace_prototype | dtraceall compile-with "${CDDL_C}" fs/nfsclient/nfs_clkdtrace.c optional dtnfscl nfscl | dtraceall nfscl compile-with "${CDDL_C}" compat/cloudabi/cloudabi_clock.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi/cloudabi_errno.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi/cloudabi_fd.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi/cloudabi_file.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi/cloudabi_futex.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi/cloudabi_mem.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi/cloudabi_proc.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi/cloudabi_random.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi/cloudabi_sock.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi/cloudabi_thread.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi/cloudabi_vdso.c optional compat_cloudabi32 | compat_cloudabi64 compat/cloudabi32/cloudabi32_fd.c optional compat_cloudabi32 compat/cloudabi32/cloudabi32_module.c optional compat_cloudabi32 compat/cloudabi32/cloudabi32_poll.c optional compat_cloudabi32 compat/cloudabi32/cloudabi32_sock.c optional compat_cloudabi32 compat/cloudabi32/cloudabi32_syscalls.c optional compat_cloudabi32 compat/cloudabi32/cloudabi32_sysent.c optional compat_cloudabi32 compat/cloudabi32/cloudabi32_thread.c optional compat_cloudabi32 compat/cloudabi64/cloudabi64_fd.c optional compat_cloudabi64 compat/cloudabi64/cloudabi64_module.c optional compat_cloudabi64 compat/cloudabi64/cloudabi64_poll.c optional compat_cloudabi64 compat/cloudabi64/cloudabi64_sock.c optional compat_cloudabi64 compat/cloudabi64/cloudabi64_syscalls.c optional compat_cloudabi64 compat/cloudabi64/cloudabi64_sysent.c optional compat_cloudabi64 compat/cloudabi64/cloudabi64_thread.c optional compat_cloudabi64 compat/freebsd32/freebsd32_capability.c optional compat_freebsd32 compat/freebsd32/freebsd32_ioctl.c optional compat_freebsd32 compat/freebsd32/freebsd32_misc.c optional compat_freebsd32 compat/freebsd32/freebsd32_syscalls.c optional compat_freebsd32 compat/freebsd32/freebsd32_sysent.c optional compat_freebsd32 contrib/ck/src/ck_array.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/ck/src/ck_barrier_centralized.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/ck/src/ck_barrier_combining.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/ck/src/ck_barrier_dissemination.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/ck/src/ck_barrier_mcs.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/ck/src/ck_barrier_tournament.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/ck/src/ck_epoch.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/ck/src/ck_hp.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/ck/src/ck_hs.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/ck/src/ck_ht.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/ck/src/ck_rhs.c standard compile-with "${NORMAL_C} -I$S/contrib/ck/include" contrib/dev/acpica/common/ahids.c optional acpi acpi_debug contrib/dev/acpica/common/ahuuids.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbcmds.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbconvert.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbdisply.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbexec.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbhistry.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbinput.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbmethod.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbnames.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbobject.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbstats.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbtest.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbutils.c optional acpi acpi_debug contrib/dev/acpica/components/debugger/dbxface.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmbuffer.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmcstyle.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmdeferred.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmnames.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmopcode.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmresrc.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmresrcl.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmresrcl2.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmresrcs.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmutils.c optional acpi acpi_debug contrib/dev/acpica/components/disassembler/dmwalk.c optional acpi acpi_debug contrib/dev/acpica/components/dispatcher/dsargs.c optional acpi contrib/dev/acpica/components/dispatcher/dscontrol.c optional acpi contrib/dev/acpica/components/dispatcher/dsdebug.c optional acpi contrib/dev/acpica/components/dispatcher/dsfield.c optional acpi contrib/dev/acpica/components/dispatcher/dsinit.c optional acpi contrib/dev/acpica/components/dispatcher/dsmethod.c optional acpi contrib/dev/acpica/components/dispatcher/dsmthdat.c optional acpi contrib/dev/acpica/components/dispatcher/dsobject.c optional acpi contrib/dev/acpica/components/dispatcher/dsopcode.c optional acpi contrib/dev/acpica/components/dispatcher/dspkginit.c optional acpi contrib/dev/acpica/components/dispatcher/dsutils.c optional acpi contrib/dev/acpica/components/dispatcher/dswexec.c optional acpi contrib/dev/acpica/components/dispatcher/dswload.c optional acpi contrib/dev/acpica/components/dispatcher/dswload2.c optional acpi contrib/dev/acpica/components/dispatcher/dswscope.c optional acpi contrib/dev/acpica/components/dispatcher/dswstate.c optional acpi contrib/dev/acpica/components/events/evevent.c optional acpi contrib/dev/acpica/components/events/evglock.c optional acpi contrib/dev/acpica/components/events/evgpe.c optional acpi contrib/dev/acpica/components/events/evgpeblk.c optional acpi contrib/dev/acpica/components/events/evgpeinit.c optional acpi contrib/dev/acpica/components/events/evgpeutil.c optional acpi contrib/dev/acpica/components/events/evhandler.c optional acpi contrib/dev/acpica/components/events/evmisc.c optional acpi contrib/dev/acpica/components/events/evregion.c optional acpi contrib/dev/acpica/components/events/evrgnini.c optional acpi contrib/dev/acpica/components/events/evsci.c optional acpi contrib/dev/acpica/components/events/evxface.c optional acpi contrib/dev/acpica/components/events/evxfevnt.c optional acpi contrib/dev/acpica/components/events/evxfgpe.c optional acpi contrib/dev/acpica/components/events/evxfregn.c optional acpi contrib/dev/acpica/components/executer/exconcat.c optional acpi contrib/dev/acpica/components/executer/exconfig.c optional acpi contrib/dev/acpica/components/executer/exconvrt.c optional acpi contrib/dev/acpica/components/executer/excreate.c optional acpi contrib/dev/acpica/components/executer/exdebug.c optional acpi contrib/dev/acpica/components/executer/exdump.c optional acpi contrib/dev/acpica/components/executer/exfield.c optional acpi contrib/dev/acpica/components/executer/exfldio.c optional acpi contrib/dev/acpica/components/executer/exmisc.c optional acpi contrib/dev/acpica/components/executer/exmutex.c optional acpi contrib/dev/acpica/components/executer/exnames.c optional acpi contrib/dev/acpica/components/executer/exoparg1.c optional acpi contrib/dev/acpica/components/executer/exoparg2.c optional acpi contrib/dev/acpica/components/executer/exoparg3.c optional acpi contrib/dev/acpica/components/executer/exoparg6.c optional acpi contrib/dev/acpica/components/executer/exprep.c optional acpi contrib/dev/acpica/components/executer/exregion.c optional acpi contrib/dev/acpica/components/executer/exresnte.c optional acpi contrib/dev/acpica/components/executer/exresolv.c optional acpi contrib/dev/acpica/components/executer/exresop.c optional acpi contrib/dev/acpica/components/executer/exserial.c optional acpi contrib/dev/acpica/components/executer/exstore.c optional acpi contrib/dev/acpica/components/executer/exstoren.c optional acpi contrib/dev/acpica/components/executer/exstorob.c optional acpi contrib/dev/acpica/components/executer/exsystem.c optional acpi contrib/dev/acpica/components/executer/extrace.c optional acpi contrib/dev/acpica/components/executer/exutils.c optional acpi contrib/dev/acpica/components/hardware/hwacpi.c optional acpi contrib/dev/acpica/components/hardware/hwesleep.c optional acpi contrib/dev/acpica/components/hardware/hwgpe.c optional acpi contrib/dev/acpica/components/hardware/hwpci.c optional acpi contrib/dev/acpica/components/hardware/hwregs.c optional acpi contrib/dev/acpica/components/hardware/hwsleep.c optional acpi contrib/dev/acpica/components/hardware/hwtimer.c optional acpi contrib/dev/acpica/components/hardware/hwvalid.c optional acpi contrib/dev/acpica/components/hardware/hwxface.c optional acpi contrib/dev/acpica/components/hardware/hwxfsleep.c optional acpi contrib/dev/acpica/components/namespace/nsaccess.c optional acpi contrib/dev/acpica/components/namespace/nsalloc.c optional acpi contrib/dev/acpica/components/namespace/nsarguments.c optional acpi contrib/dev/acpica/components/namespace/nsconvert.c optional acpi contrib/dev/acpica/components/namespace/nsdump.c optional acpi contrib/dev/acpica/components/namespace/nseval.c optional acpi contrib/dev/acpica/components/namespace/nsinit.c optional acpi contrib/dev/acpica/components/namespace/nsload.c optional acpi contrib/dev/acpica/components/namespace/nsnames.c optional acpi contrib/dev/acpica/components/namespace/nsobject.c optional acpi contrib/dev/acpica/components/namespace/nsparse.c optional acpi contrib/dev/acpica/components/namespace/nspredef.c optional acpi contrib/dev/acpica/components/namespace/nsprepkg.c optional acpi contrib/dev/acpica/components/namespace/nsrepair.c optional acpi contrib/dev/acpica/components/namespace/nsrepair2.c optional acpi contrib/dev/acpica/components/namespace/nssearch.c optional acpi contrib/dev/acpica/components/namespace/nsutils.c optional acpi contrib/dev/acpica/components/namespace/nswalk.c optional acpi contrib/dev/acpica/components/namespace/nsxfeval.c optional acpi contrib/dev/acpica/components/namespace/nsxfname.c optional acpi contrib/dev/acpica/components/namespace/nsxfobj.c optional acpi contrib/dev/acpica/components/parser/psargs.c optional acpi contrib/dev/acpica/components/parser/psloop.c optional acpi contrib/dev/acpica/components/parser/psobject.c optional acpi contrib/dev/acpica/components/parser/psopcode.c optional acpi contrib/dev/acpica/components/parser/psopinfo.c optional acpi contrib/dev/acpica/components/parser/psparse.c optional acpi contrib/dev/acpica/components/parser/psscope.c optional acpi contrib/dev/acpica/components/parser/pstree.c optional acpi contrib/dev/acpica/components/parser/psutils.c optional acpi contrib/dev/acpica/components/parser/pswalk.c optional acpi contrib/dev/acpica/components/parser/psxface.c optional acpi contrib/dev/acpica/components/resources/rsaddr.c optional acpi contrib/dev/acpica/components/resources/rscalc.c optional acpi contrib/dev/acpica/components/resources/rscreate.c optional acpi contrib/dev/acpica/components/resources/rsdump.c optional acpi acpi_debug contrib/dev/acpica/components/resources/rsdumpinfo.c optional acpi contrib/dev/acpica/components/resources/rsinfo.c optional acpi contrib/dev/acpica/components/resources/rsio.c optional acpi contrib/dev/acpica/components/resources/rsirq.c optional acpi contrib/dev/acpica/components/resources/rslist.c optional acpi contrib/dev/acpica/components/resources/rsmemory.c optional acpi contrib/dev/acpica/components/resources/rsmisc.c optional acpi contrib/dev/acpica/components/resources/rsserial.c optional acpi contrib/dev/acpica/components/resources/rsutils.c optional acpi contrib/dev/acpica/components/resources/rsxface.c optional acpi contrib/dev/acpica/components/tables/tbdata.c optional acpi contrib/dev/acpica/components/tables/tbfadt.c optional acpi contrib/dev/acpica/components/tables/tbfind.c optional acpi contrib/dev/acpica/components/tables/tbinstal.c optional acpi contrib/dev/acpica/components/tables/tbprint.c optional acpi contrib/dev/acpica/components/tables/tbutils.c optional acpi contrib/dev/acpica/components/tables/tbxface.c optional acpi contrib/dev/acpica/components/tables/tbxfload.c optional acpi contrib/dev/acpica/components/tables/tbxfroot.c optional acpi contrib/dev/acpica/components/utilities/utaddress.c optional acpi contrib/dev/acpica/components/utilities/utalloc.c optional acpi contrib/dev/acpica/components/utilities/utascii.c optional acpi contrib/dev/acpica/components/utilities/utbuffer.c optional acpi contrib/dev/acpica/components/utilities/utcache.c optional acpi contrib/dev/acpica/components/utilities/utcopy.c optional acpi contrib/dev/acpica/components/utilities/utdebug.c optional acpi contrib/dev/acpica/components/utilities/utdecode.c optional acpi contrib/dev/acpica/components/utilities/utdelete.c optional acpi contrib/dev/acpica/components/utilities/uterror.c optional acpi contrib/dev/acpica/components/utilities/uteval.c optional acpi contrib/dev/acpica/components/utilities/utexcep.c optional acpi contrib/dev/acpica/components/utilities/utglobal.c optional acpi contrib/dev/acpica/components/utilities/uthex.c optional acpi contrib/dev/acpica/components/utilities/utids.c optional acpi contrib/dev/acpica/components/utilities/utinit.c optional acpi contrib/dev/acpica/components/utilities/utlock.c optional acpi contrib/dev/acpica/components/utilities/utmath.c optional acpi contrib/dev/acpica/components/utilities/utmisc.c optional acpi contrib/dev/acpica/components/utilities/utmutex.c optional acpi contrib/dev/acpica/components/utilities/utnonansi.c optional acpi contrib/dev/acpica/components/utilities/utobject.c optional acpi contrib/dev/acpica/components/utilities/utosi.c optional acpi contrib/dev/acpica/components/utilities/utownerid.c optional acpi contrib/dev/acpica/components/utilities/utpredef.c optional acpi contrib/dev/acpica/components/utilities/utresdecode.c optional acpi acpi_debug contrib/dev/acpica/components/utilities/utresrc.c optional acpi contrib/dev/acpica/components/utilities/utstate.c optional acpi contrib/dev/acpica/components/utilities/utstring.c optional acpi contrib/dev/acpica/components/utilities/utstrsuppt.c optional acpi contrib/dev/acpica/components/utilities/utstrtoul64.c optional acpi contrib/dev/acpica/components/utilities/utuuid.c optional acpi acpi_debug contrib/dev/acpica/components/utilities/utxface.c optional acpi contrib/dev/acpica/components/utilities/utxferror.c optional acpi contrib/dev/acpica/components/utilities/utxfinit.c optional acpi contrib/dev/acpica/os_specific/service_layers/osgendbg.c optional acpi acpi_debug contrib/ipfilter/netinet/fil.c optional ipfilter inet \ compile-with "${NORMAL_C} ${NO_WSELF_ASSIGN} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_auth.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_fil_freebsd.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_frag.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_log.c optional ipfilter inet \ compile-with "${NORMAL_C} -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_nat.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_proxy.c optional ipfilter inet \ compile-with "${NORMAL_C} ${NO_WSELF_ASSIGN} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_state.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_lookup.c optional ipfilter inet \ compile-with "${NORMAL_C} ${NO_WSELF_ASSIGN} -Wno-unused -Wno-error -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_pool.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_htable.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter ${NO_WTAUTOLOGICAL_POINTER_COMPARE}" contrib/ipfilter/netinet/ip_sync.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/mlfk_ipl.c optional ipfilter inet \ compile-with "${NORMAL_C} -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_nat6.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_rules.c optional ipfilter inet \ compile-with "${NORMAL_C} -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_scan.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/ip_dstlist.c optional ipfilter inet \ compile-with "${NORMAL_C} -Wno-unused -I$S/contrib/ipfilter" contrib/ipfilter/netinet/radix_ipf.c optional ipfilter inet \ compile-with "${NORMAL_C} -I$S/contrib/ipfilter" contrib/libfdt/fdt.c optional fdt contrib/libfdt/fdt_ro.c optional fdt contrib/libfdt/fdt_rw.c optional fdt contrib/libfdt/fdt_strerror.c optional fdt contrib/libfdt/fdt_sw.c optional fdt contrib/libfdt/fdt_wip.c optional fdt contrib/libnv/cnvlist.c standard contrib/libnv/dnvlist.c standard contrib/libnv/nvlist.c standard contrib/libnv/nvpair.c standard contrib/ngatm/netnatm/api/cc_conn.c optional ngatm_ccatm \ compile-with "${NORMAL_C_NOWERROR} -I$S/contrib/ngatm" contrib/ngatm/netnatm/api/cc_data.c optional ngatm_ccatm \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/api/cc_dump.c optional ngatm_ccatm \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/api/cc_port.c optional ngatm_ccatm \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/api/cc_sig.c optional ngatm_ccatm \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/api/cc_user.c optional ngatm_ccatm \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/api/unisap.c optional ngatm_ccatm \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/misc/straddr.c optional ngatm_atmbase \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/misc/unimsg_common.c optional ngatm_atmbase \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/msg/traffic.c optional ngatm_atmbase \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/msg/uni_ie.c optional ngatm_atmbase \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/msg/uni_msg.c optional ngatm_atmbase \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/saal/saal_sscfu.c optional ngatm_sscfu \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/saal/saal_sscop.c optional ngatm_sscop \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/sig/sig_call.c optional ngatm_uni \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/sig/sig_coord.c optional ngatm_uni \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/sig/sig_party.c optional ngatm_uni \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/sig/sig_print.c optional ngatm_uni \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/sig/sig_reset.c optional ngatm_uni \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/sig/sig_uni.c optional ngatm_uni \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/sig/sig_unimsgcpy.c optional ngatm_uni \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" contrib/ngatm/netnatm/sig/sig_verify.c optional ngatm_uni \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" # xz dev/xz/xz_mod.c optional xz \ compile-with "${NORMAL_C} -I$S/contrib/xz-embedded/freebsd/ -I$S/contrib/xz-embedded/linux/lib/xz/ -I$S/contrib/xz-embedded/linux/include/linux/" contrib/xz-embedded/linux/lib/xz/xz_crc32.c optional xz \ compile-with "${NORMAL_C} -I$S/contrib/xz-embedded/freebsd/ -I$S/contrib/xz-embedded/linux/lib/xz/ -I$S/contrib/xz-embedded/linux/include/linux/" contrib/xz-embedded/linux/lib/xz/xz_dec_bcj.c optional xz \ compile-with "${NORMAL_C} -I$S/contrib/xz-embedded/freebsd/ -I$S/contrib/xz-embedded/linux/lib/xz/ -I$S/contrib/xz-embedded/linux/include/linux/" contrib/xz-embedded/linux/lib/xz/xz_dec_lzma2.c optional xz \ compile-with "${NORMAL_C} -I$S/contrib/xz-embedded/freebsd/ -I$S/contrib/xz-embedded/linux/lib/xz/ -I$S/contrib/xz-embedded/linux/include/linux/" contrib/xz-embedded/linux/lib/xz/xz_dec_stream.c optional xz \ compile-with "${NORMAL_C} -I$S/contrib/xz-embedded/freebsd/ -I$S/contrib/xz-embedded/linux/lib/xz/ -I$S/contrib/xz-embedded/linux/include/linux/" # Zstd contrib/zstd/lib/freebsd/zstd_kmalloc.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/common/zstd_common.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/common/fse_decompress.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/common/entropy_common.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/common/error_private.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/common/xxhash.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/zstd_compress.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/zstd_compress_literals.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/zstd_compress_sequences.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/fse_compress.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/hist.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/huf_compress.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/zstd_double_fast.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/zstd_fast.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/zstd_lazy.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/zstd_ldm.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/compress/zstd_opt.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/decompress/zstd_ddict.c optional zstdio compile-with ${ZSTD_C} contrib/zstd/lib/decompress/zstd_decompress.c optional zstdio compile-with ${ZSTD_C} # See comment in sys/conf/kern.pre.mk contrib/zstd/lib/decompress/zstd_decompress_block.c optional zstdio \ compile-with "${ZSTD_C} ${ZSTD_DECOMPRESS_BLOCK_FLAGS}" contrib/zstd/lib/decompress/huf_decompress.c optional zstdio compile-with ${ZSTD_C} # Blake 2 contrib/libb2/blake2b-ref.c optional crypto | ipsec | ipsec_support \ compile-with "${NORMAL_C} -I$S/crypto/blake2 -Wno-cast-qual -DSUFFIX=_ref -Wno-unused-function" contrib/libb2/blake2s-ref.c optional crypto | ipsec | ipsec_support \ compile-with "${NORMAL_C} -I$S/crypto/blake2 -Wno-cast-qual -DSUFFIX=_ref -Wno-unused-function" crypto/blake2/blake2-sw.c optional crypto | ipsec | ipsec_support \ compile-with "${NORMAL_C} -I$S/crypto/blake2 -Wno-cast-qual" crypto/blowfish/bf_ecb.c optional ipsec | ipsec_support crypto/blowfish/bf_skey.c optional crypto | ipsec | ipsec_support crypto/camellia/camellia.c optional crypto | ipsec | ipsec_support crypto/camellia/camellia-api.c optional crypto | ipsec | ipsec_support crypto/chacha20/chacha.c optional crypto | ipsec | ipsec_support crypto/chacha20/chacha-sw.c optional crypto | ipsec | ipsec_support crypto/des/des_ecb.c optional crypto | ipsec | ipsec_support | netsmb crypto/des/des_setkey.c optional crypto | ipsec | ipsec_support | netsmb crypto/rc4/rc4.c optional netgraph_mppc_encryption | kgssapi crypto/rijndael/rijndael-alg-fst.c optional crypto | ekcd | geom_bde | \ ipsec | ipsec_support | !random_loadable | wlan_ccmp crypto/rijndael/rijndael-api-fst.c optional ekcd | geom_bde | !random_loadable crypto/rijndael/rijndael-api.c optional crypto | ipsec | ipsec_support | \ wlan_ccmp crypto/sha1.c optional carp | crypto | ether | ipsec | \ ipsec_support | netgraph_mppc_encryption | sctp crypto/sha2/sha256c.c optional crypto | ekcd | geom_bde | ipsec | \ ipsec_support | !random_loadable | sctp | zfs crypto/sha2/sha512c.c optional crypto | geom_bde | ipsec | \ ipsec_support | zfs crypto/skein/skein.c optional crypto | zfs crypto/skein/skein_block.c optional crypto | zfs crypto/siphash/siphash.c optional inet | inet6 crypto/siphash/siphash_test.c optional inet | inet6 ddb/db_access.c optional ddb ddb/db_break.c optional ddb ddb/db_capture.c optional ddb ddb/db_command.c optional ddb ddb/db_examine.c optional ddb ddb/db_expr.c optional ddb ddb/db_input.c optional ddb ddb/db_lex.c optional ddb ddb/db_main.c optional ddb ddb/db_output.c optional ddb ddb/db_print.c optional ddb ddb/db_ps.c optional ddb ddb/db_run.c optional ddb ddb/db_script.c optional ddb ddb/db_sym.c optional ddb ddb/db_thread.c optional ddb ddb/db_textdump.c optional ddb ddb/db_variables.c optional ddb ddb/db_watch.c optional ddb ddb/db_write_cmd.c optional ddb dev/aac/aac.c optional aac dev/aac/aac_cam.c optional aacp aac dev/aac/aac_debug.c optional aac dev/aac/aac_disk.c optional aac dev/aac/aac_linux.c optional aac compat_linux dev/aac/aac_pci.c optional aac pci dev/aacraid/aacraid.c optional aacraid dev/aacraid/aacraid_cam.c optional aacraid scbus dev/aacraid/aacraid_debug.c optional aacraid dev/aacraid/aacraid_linux.c optional aacraid compat_linux dev/aacraid/aacraid_pci.c optional aacraid pci dev/acpi_support/acpi_wmi.c optional acpi_wmi acpi dev/acpi_support/acpi_asus.c optional acpi_asus acpi dev/acpi_support/acpi_asus_wmi.c optional acpi_asus_wmi acpi dev/acpi_support/acpi_fujitsu.c optional acpi_fujitsu acpi dev/acpi_support/acpi_hp.c optional acpi_hp acpi dev/acpi_support/acpi_ibm.c optional acpi_ibm acpi dev/acpi_support/acpi_panasonic.c optional acpi_panasonic acpi dev/acpi_support/acpi_sony.c optional acpi_sony acpi dev/acpi_support/acpi_toshiba.c optional acpi_toshiba acpi dev/acpi_support/atk0110.c optional aibs acpi dev/acpica/Osd/OsdDebug.c optional acpi dev/acpica/Osd/OsdHardware.c optional acpi dev/acpica/Osd/OsdInterrupt.c optional acpi dev/acpica/Osd/OsdMemory.c optional acpi dev/acpica/Osd/OsdSchedule.c optional acpi dev/acpica/Osd/OsdStream.c optional acpi dev/acpica/Osd/OsdSynch.c optional acpi dev/acpica/Osd/OsdTable.c optional acpi dev/acpica/acpi.c optional acpi dev/acpica/acpi_acad.c optional acpi dev/acpica/acpi_battery.c optional acpi dev/acpica/acpi_button.c optional acpi dev/acpica/acpi_cmbat.c optional acpi dev/acpica/acpi_cpu.c optional acpi dev/acpica/acpi_ec.c optional acpi dev/acpica/acpi_isab.c optional acpi isa dev/acpica/acpi_lid.c optional acpi dev/acpica/acpi_package.c optional acpi dev/acpica/acpi_perf.c optional acpi dev/acpica/acpi_powerres.c optional acpi dev/acpica/acpi_quirk.c optional acpi dev/acpica/acpi_resource.c optional acpi dev/acpica/acpi_container.c optional acpi dev/acpica/acpi_smbat.c optional acpi dev/acpica/acpi_thermal.c optional acpi dev/acpica/acpi_throttle.c optional acpi dev/acpica/acpi_video.c optional acpi_video acpi dev/acpica/acpi_dock.c optional acpi_dock acpi dev/adlink/adlink.c optional adlink dev/ae/if_ae.c optional ae pci dev/age/if_age.c optional age pci dev/agp/agp.c optional agp pci dev/agp/agp_if.m optional agp pci dev/ahci/ahci.c optional ahci dev/ahci/ahciem.c optional ahci dev/ahci/ahci_pci.c optional ahci pci dev/aic7xxx/ahc_isa.c optional ahc isa dev/aic7xxx/ahc_pci.c optional ahc pci \ compile-with "${NORMAL_C} ${NO_WCONSTANT_CONVERSION}" dev/aic7xxx/ahd_pci.c optional ahd pci \ compile-with "${NORMAL_C} ${NO_WCONSTANT_CONVERSION}" dev/aic7xxx/aic7770.c optional ahc dev/aic7xxx/aic79xx.c optional ahd pci dev/aic7xxx/aic79xx_osm.c optional ahd pci dev/aic7xxx/aic79xx_pci.c optional ahd pci dev/aic7xxx/aic79xx_reg_print.c optional ahd pci ahd_reg_pretty_print dev/aic7xxx/aic7xxx.c optional ahc dev/aic7xxx/aic7xxx_93cx6.c optional ahc dev/aic7xxx/aic7xxx_osm.c optional ahc dev/aic7xxx/aic7xxx_pci.c optional ahc pci dev/aic7xxx/aic7xxx_reg_print.c optional ahc ahc_reg_pretty_print dev/al_eth/al_eth.c optional al_eth fdt \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" dev/al_eth/al_init_eth_lm.c optional al_eth fdt \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" dev/al_eth/al_init_eth_kr.c optional al_eth fdt \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" contrib/alpine-hal/al_hal_iofic.c optional al_iofic \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" contrib/alpine-hal/al_hal_serdes_25g.c optional al_serdes \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" contrib/alpine-hal/al_hal_serdes_hssp.c optional al_serdes \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" contrib/alpine-hal/al_hal_udma_config.c optional al_udma \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" contrib/alpine-hal/al_hal_udma_debug.c optional al_udma \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" contrib/alpine-hal/al_hal_udma_iofic.c optional al_udma \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" contrib/alpine-hal/al_hal_udma_main.c optional al_udma \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" contrib/alpine-hal/al_serdes.c optional al_serdes \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" contrib/alpine-hal/eth/al_hal_eth_kr.c optional al_eth \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" contrib/alpine-hal/eth/al_hal_eth_main.c optional al_eth \ no-depend \ compile-with "${CC} -c -o ${.TARGET} ${CFLAGS} -I$S/contrib/alpine-hal -I$S/contrib/alpine-hal/eth ${PROF} ${.IMPSRC}" dev/alc/if_alc.c optional alc pci dev/ale/if_ale.c optional ale pci dev/alpm/alpm.c optional alpm pci dev/altera/avgen/altera_avgen.c optional altera_avgen dev/altera/avgen/altera_avgen_fdt.c optional altera_avgen fdt dev/altera/avgen/altera_avgen_nexus.c optional altera_avgen dev/altera/msgdma/msgdma.c optional altera_msgdma xdma dev/altera/sdcard/altera_sdcard.c optional altera_sdcard dev/altera/sdcard/altera_sdcard_disk.c optional altera_sdcard dev/altera/sdcard/altera_sdcard_io.c optional altera_sdcard dev/altera/sdcard/altera_sdcard_fdt.c optional altera_sdcard fdt dev/altera/sdcard/altera_sdcard_nexus.c optional altera_sdcard dev/altera/softdma/softdma.c optional altera_softdma xdma fdt dev/altera/pio/pio.c optional altera_pio dev/altera/pio/pio_if.m optional altera_pio dev/amdpm/amdpm.c optional amdpm pci | nfpm pci dev/amdsmb/amdsmb.c optional amdsmb pci dev/amr/amr.c optional amr dev/amr/amr_cam.c optional amrp amr dev/amr/amr_disk.c optional amr dev/amr/amr_linux.c optional amr compat_linux dev/amr/amr_pci.c optional amr pci dev/an/if_an.c optional an dev/an/if_an_isa.c optional an isa dev/an/if_an_pccard.c optional an pccard dev/an/if_an_pci.c optional an pci # dev/ata/ata_if.m optional ata | atacore dev/ata/ata-all.c optional ata | atacore dev/ata/ata-dma.c optional ata | atacore dev/ata/ata-lowlevel.c optional ata | atacore dev/ata/ata-sata.c optional ata | atacore dev/ata/ata-card.c optional ata pccard | atapccard dev/ata/ata-isa.c optional ata isa | ataisa dev/ata/ata-pci.c optional ata pci | atapci dev/ata/chipsets/ata-acard.c optional ata pci | ataacard dev/ata/chipsets/ata-acerlabs.c optional ata pci | ataacerlabs dev/ata/chipsets/ata-amd.c optional ata pci | ataamd dev/ata/chipsets/ata-ati.c optional ata pci | ataati dev/ata/chipsets/ata-cenatek.c optional ata pci | atacenatek dev/ata/chipsets/ata-cypress.c optional ata pci | atacypress dev/ata/chipsets/ata-cyrix.c optional ata pci | atacyrix dev/ata/chipsets/ata-highpoint.c optional ata pci | atahighpoint dev/ata/chipsets/ata-intel.c optional ata pci | ataintel dev/ata/chipsets/ata-ite.c optional ata pci | ataite dev/ata/chipsets/ata-jmicron.c optional ata pci | atajmicron dev/ata/chipsets/ata-marvell.c optional ata pci | atamarvell dev/ata/chipsets/ata-micron.c optional ata pci | atamicron dev/ata/chipsets/ata-national.c optional ata pci | atanational dev/ata/chipsets/ata-netcell.c optional ata pci | atanetcell dev/ata/chipsets/ata-nvidia.c optional ata pci | atanvidia dev/ata/chipsets/ata-promise.c optional ata pci | atapromise dev/ata/chipsets/ata-serverworks.c optional ata pci | ataserverworks dev/ata/chipsets/ata-siliconimage.c optional ata pci | atasiliconimage | ataati dev/ata/chipsets/ata-sis.c optional ata pci | atasis dev/ata/chipsets/ata-via.c optional ata pci | atavia # dev/ath/if_ath_pci.c optional ath_pci pci \ compile-with "${NORMAL_C} -I$S/dev/ath" # dev/ath/if_ath_ahb.c optional ath_ahb \ compile-with "${NORMAL_C} -I$S/dev/ath" # dev/ath/if_ath.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_alq.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_beacon.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_btcoex.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_btcoex_mci.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_debug.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_descdma.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_keycache.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_ioctl.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_led.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_lna_div.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_tx.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_tx_edma.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_tx_ht.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_tdma.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_sysctl.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_rx.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_rx_edma.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/if_ath_spectral.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/ah_osdep.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" # dev/ath/ath_hal/ah.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/ath_hal/ah_eeprom_v1.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/ath_hal/ah_eeprom_v3.c optional ath_hal | ath_ar5211 | ath_ar5212 \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/ath_hal/ah_eeprom_v14.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/ath_hal/ah_eeprom_v4k.c \ optional ath_hal | ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/ath_hal/ah_eeprom_9287.c \ optional ath_hal | ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/ath_hal/ah_regdomain.c optional ath \ compile-with "${NORMAL_C} ${NO_WSHIFT_COUNT_NEGATIVE} ${NO_WSHIFT_COUNT_OVERFLOW} -I$S/dev/ath" # ar5210 dev/ath/ath_hal/ar5210/ar5210_attach.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5210/ar5210_beacon.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5210/ar5210_interrupts.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5210/ar5210_keycache.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5210/ar5210_misc.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5210/ar5210_phy.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5210/ar5210_power.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5210/ar5210_recv.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5210/ar5210_reset.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5210/ar5210_xmit.c optional ath_hal | ath_ar5210 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" # ar5211 dev/ath/ath_hal/ar5211/ar5211_attach.c optional ath_hal | ath_ar5211 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5211/ar5211_beacon.c optional ath_hal | ath_ar5211 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5211/ar5211_interrupts.c optional ath_hal | ath_ar5211 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5211/ar5211_keycache.c optional ath_hal | ath_ar5211 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5211/ar5211_misc.c optional ath_hal | ath_ar5211 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5211/ar5211_phy.c optional ath_hal | ath_ar5211 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5211/ar5211_power.c optional ath_hal | ath_ar5211 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5211/ar5211_recv.c optional ath_hal | ath_ar5211 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5211/ar5211_reset.c optional ath_hal | ath_ar5211 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5211/ar5211_xmit.c optional ath_hal | ath_ar5211 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" # ar5212 dev/ath/ath_hal/ar5212/ar5212_ani.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_attach.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_beacon.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_eeprom.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_gpio.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_interrupts.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_keycache.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_misc.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_phy.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_power.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_recv.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_reset.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_rfgain.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5212_xmit.c \ optional ath_hal | ath_ar5212 | ath_ar5416 | ath_ar9160 | ath_ar9280 | \ ath_ar9285 ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" # ar5416 (depends on ar5212) dev/ath/ath_hal/ar5416/ar5416_ani.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_attach.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_beacon.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_btcoex.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_cal.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_cal_iq.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_cal_adcgain.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_cal_adcdc.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_eeprom.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_gpio.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_interrupts.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_keycache.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_misc.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_phy.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_power.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_radar.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_recv.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_reset.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_spectral.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar5416_xmit.c \ optional ath_hal | ath_ar5416 | ath_ar9160 | ath_ar9280 | ath_ar9285 | \ ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" # ar9130 (depends upon ar5416) - also requires AH_SUPPORT_AR9130 # # Since this is an embedded MAC SoC, there's no need to compile it into the # default HAL. dev/ath/ath_hal/ar9001/ar9130_attach.c optional ath_ar9130 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9001/ar9130_phy.c optional ath_ar9130 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9001/ar9130_eeprom.c optional ath_ar9130 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" # ar9160 (depends on ar5416) dev/ath/ath_hal/ar9001/ar9160_attach.c optional ath_hal | ath_ar9160 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" # ar9280 (depends on ar5416) dev/ath/ath_hal/ar9002/ar9280_attach.c optional ath_hal | ath_ar9280 | \ ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9280_olc.c optional ath_hal | ath_ar9280 | \ ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" # ar9285 (depends on ar5416 and ar9280) dev/ath/ath_hal/ar9002/ar9285_attach.c optional ath_hal | ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9285_btcoex.c optional ath_hal | ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9285_reset.c optional ath_hal | ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9285_cal.c optional ath_hal | ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9285_phy.c optional ath_hal | ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9285_diversity.c optional ath_hal | ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" # ar9287 (depends on ar5416) dev/ath/ath_hal/ar9002/ar9287_attach.c optional ath_hal | ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9287_reset.c optional ath_hal | ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9287_cal.c optional ath_hal | ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9287_olc.c optional ath_hal | ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" # ar9300 contrib/dev/ath/ath_hal/ar9300/ar9300_ani.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_attach.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_beacon.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_eeprom.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal ${NO_WCONSTANT_CONVERSION}" contrib/dev/ath/ath_hal/ar9300/ar9300_freebsd.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_gpio.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_interrupts.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_keycache.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_mci.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_misc.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_paprd.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_phy.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_power.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_radar.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_radio.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_recv.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_recv_ds.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_reset.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal ${NO_WSOMETIMES_UNINITIALIZED} -Wno-unused-function" contrib/dev/ath/ath_hal/ar9300/ar9300_stub.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_stub_funcs.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_spectral.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_timer.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_xmit.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" contrib/dev/ath/ath_hal/ar9300/ar9300_xmit_ds.c optional ath_hal | ath_ar9300 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal" # rf backends dev/ath/ath_hal/ar5212/ar2316.c optional ath_rf2316 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar2317.c optional ath_rf2317 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar2413.c optional ath_hal | ath_rf2413 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar2425.c optional ath_hal | ath_rf2425 | ath_rf2417 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5111.c optional ath_hal | ath_rf5111 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5112.c optional ath_hal | ath_rf5112 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5212/ar5413.c optional ath_hal | ath_rf5413 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar5416/ar2133.c optional ath_hal | ath_ar5416 | \ ath_ar9130 | ath_ar9160 | ath_ar9280 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9280.c optional ath_hal | ath_ar9280 | ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9285.c optional ath_hal | ath_ar9285 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" dev/ath/ath_hal/ar9002/ar9287.c optional ath_hal | ath_ar9287 \ compile-with "${NORMAL_C} -I$S/dev/ath -I$S/dev/ath/ath_hal" # ath rate control algorithms dev/ath/ath_rate/amrr/amrr.c optional ath_rate_amrr \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/ath_rate/onoe/onoe.c optional ath_rate_onoe \ compile-with "${NORMAL_C} -I$S/dev/ath" dev/ath/ath_rate/sample/sample.c optional ath_rate_sample \ compile-with "${NORMAL_C} -I$S/dev/ath" # ath DFS modules dev/ath/ath_dfs/null/dfs_null.c optional ath \ compile-with "${NORMAL_C} -I$S/dev/ath" # dev/bce/if_bce.c optional bce dev/bfe/if_bfe.c optional bfe dev/bge/if_bge.c optional bge dev/bhnd/bhnd.c optional bhnd dev/bhnd/bhnd_erom.c optional bhnd dev/bhnd/bhnd_erom_if.m optional bhnd dev/bhnd/bhnd_subr.c optional bhnd dev/bhnd/bhnd_bus_if.m optional bhnd dev/bhnd/bhndb/bhnd_bhndb.c optional bhndb bhnd dev/bhnd/bhndb/bhndb.c optional bhndb bhnd dev/bhnd/bhndb/bhndb_bus_if.m optional bhndb bhnd dev/bhnd/bhndb/bhndb_hwdata.c optional bhndb bhnd dev/bhnd/bhndb/bhndb_if.m optional bhndb bhnd dev/bhnd/bhndb/bhndb_pci.c optional bhndb_pci bhndb bhnd pci dev/bhnd/bhndb/bhndb_pci_hwdata.c optional bhndb_pci bhndb bhnd pci dev/bhnd/bhndb/bhndb_pci_sprom.c optional bhndb_pci bhndb bhnd pci dev/bhnd/bhndb/bhndb_subr.c optional bhndb bhnd dev/bhnd/bcma/bcma.c optional bcma bhnd dev/bhnd/bcma/bcma_bhndb.c optional bcma bhnd bhndb dev/bhnd/bcma/bcma_erom.c optional bcma bhnd dev/bhnd/bcma/bcma_subr.c optional bcma bhnd dev/bhnd/cores/chipc/bhnd_chipc_if.m optional bhnd dev/bhnd/cores/chipc/bhnd_sprom_chipc.c optional bhnd dev/bhnd/cores/chipc/bhnd_pmu_chipc.c optional bhnd dev/bhnd/cores/chipc/chipc.c optional bhnd dev/bhnd/cores/chipc/chipc_cfi.c optional bhnd cfi dev/bhnd/cores/chipc/chipc_gpio.c optional bhnd gpio dev/bhnd/cores/chipc/chipc_slicer.c optional bhnd cfi | bhnd spibus dev/bhnd/cores/chipc/chipc_spi.c optional bhnd spibus dev/bhnd/cores/chipc/chipc_subr.c optional bhnd dev/bhnd/cores/chipc/pwrctl/bhnd_pwrctl.c optional bhnd dev/bhnd/cores/chipc/pwrctl/bhnd_pwrctl_if.m optional bhnd dev/bhnd/cores/chipc/pwrctl/bhnd_pwrctl_hostb_if.m optional bhnd dev/bhnd/cores/chipc/pwrctl/bhnd_pwrctl_subr.c optional bhnd dev/bhnd/cores/pci/bhnd_pci.c optional bhnd pci dev/bhnd/cores/pci/bhnd_pci_hostb.c optional bhndb bhnd pci dev/bhnd/cores/pci/bhnd_pcib.c optional bhnd_pcib bhnd pci dev/bhnd/cores/pcie2/bhnd_pcie2.c optional bhnd pci dev/bhnd/cores/pcie2/bhnd_pcie2_hostb.c optional bhndb bhnd pci dev/bhnd/cores/pcie2/bhnd_pcie2b.c optional bhnd_pcie2b bhnd pci dev/bhnd/cores/pmu/bhnd_pmu.c optional bhnd dev/bhnd/cores/pmu/bhnd_pmu_core.c optional bhnd dev/bhnd/cores/pmu/bhnd_pmu_if.m optional bhnd dev/bhnd/cores/pmu/bhnd_pmu_subr.c optional bhnd dev/bhnd/nvram/bhnd_nvram_data.c optional bhnd dev/bhnd/nvram/bhnd_nvram_data_bcm.c optional bhnd dev/bhnd/nvram/bhnd_nvram_data_bcmraw.c optional bhnd dev/bhnd/nvram/bhnd_nvram_data_btxt.c optional bhnd dev/bhnd/nvram/bhnd_nvram_data_sprom.c optional bhnd dev/bhnd/nvram/bhnd_nvram_data_sprom_subr.c optional bhnd dev/bhnd/nvram/bhnd_nvram_data_tlv.c optional bhnd dev/bhnd/nvram/bhnd_nvram_if.m optional bhnd dev/bhnd/nvram/bhnd_nvram_io.c optional bhnd dev/bhnd/nvram/bhnd_nvram_iobuf.c optional bhnd dev/bhnd/nvram/bhnd_nvram_ioptr.c optional bhnd dev/bhnd/nvram/bhnd_nvram_iores.c optional bhnd dev/bhnd/nvram/bhnd_nvram_plist.c optional bhnd dev/bhnd/nvram/bhnd_nvram_store.c optional bhnd dev/bhnd/nvram/bhnd_nvram_store_subr.c optional bhnd dev/bhnd/nvram/bhnd_nvram_subr.c optional bhnd dev/bhnd/nvram/bhnd_nvram_value.c optional bhnd dev/bhnd/nvram/bhnd_nvram_value_fmts.c optional bhnd dev/bhnd/nvram/bhnd_nvram_value_prf.c optional bhnd dev/bhnd/nvram/bhnd_nvram_value_subr.c optional bhnd dev/bhnd/nvram/bhnd_sprom.c optional bhnd dev/bhnd/siba/siba.c optional siba bhnd dev/bhnd/siba/siba_bhndb.c optional siba bhnd bhndb dev/bhnd/siba/siba_erom.c optional siba bhnd dev/bhnd/siba/siba_subr.c optional siba bhnd # dev/bktr/bktr_audio.c optional bktr pci dev/bktr/bktr_card.c optional bktr pci dev/bktr/bktr_core.c optional bktr pci dev/bktr/bktr_i2c.c optional bktr pci smbus dev/bktr/bktr_os.c optional bktr pci dev/bktr/bktr_tuner.c optional bktr pci dev/bktr/msp34xx.c optional bktr pci dev/bnxt/bnxt_hwrm.c optional bnxt iflib pci dev/bnxt/bnxt_sysctl.c optional bnxt iflib pci dev/bnxt/bnxt_txrx.c optional bnxt iflib pci dev/bnxt/if_bnxt.c optional bnxt iflib pci dev/bwi/bwimac.c optional bwi dev/bwi/bwiphy.c optional bwi dev/bwi/bwirf.c optional bwi dev/bwi/if_bwi.c optional bwi dev/bwi/if_bwi_pci.c optional bwi pci dev/bwn/if_bwn.c optional bwn bhnd dev/bwn/if_bwn_pci.c optional bwn pci bhnd bhndb bhndb_pci dev/bwn/if_bwn_phy_common.c optional bwn bhnd dev/bwn/if_bwn_phy_g.c optional bwn bhnd dev/bwn/if_bwn_phy_lp.c optional bwn bhnd dev/bwn/if_bwn_phy_n.c optional bwn bhnd dev/bwn/if_bwn_util.c optional bwn bhnd dev/cardbus/cardbus.c optional cardbus dev/cardbus/cardbus_cis.c optional cardbus dev/cardbus/cardbus_device.c optional cardbus dev/cas/if_cas.c optional cas dev/cfi/cfi_bus_fdt.c optional cfi fdt dev/cfi/cfi_bus_nexus.c optional cfi dev/cfi/cfi_core.c optional cfi dev/cfi/cfi_dev.c optional cfi dev/cfi/cfi_disk.c optional cfid dev/chromebook_platform/chromebook_platform.c optional chromebook_platform dev/ciss/ciss.c optional ciss dev/cmx/cmx.c optional cmx dev/cmx/cmx_pccard.c optional cmx pccard dev/cpufreq/ichss.c optional cpufreq pci dev/cxgb/cxgb_main.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/cxgb_sge.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/common/cxgb_mc5.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/common/cxgb_vsc7323.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/common/cxgb_vsc8211.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/common/cxgb_ael1002.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/common/cxgb_aq100x.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/common/cxgb_mv88e1xxx.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/common/cxgb_xgmac.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/common/cxgb_t3_hw.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/common/cxgb_tn1010.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/sys/uipc_mvec.c optional cxgb pci \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgb/cxgb_t3fw.c optional cxgb cxgb_t3fw \ compile-with "${NORMAL_C} -I$S/dev/cxgb" dev/cxgbe/t4_clip.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_filter.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_if.m optional cxgbe pci dev/cxgbe/t4_iov.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_mp_ring.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_main.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_netmap.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_sched.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_sge.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_smt.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_l2t.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_tracer.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/t4_vf.c optional cxgbev pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/common/t4_hw.c optional cxgbe pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/common/t4vf_hw.c optional cxgbev pci \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/cudbg/cudbg_common.c optional cxgbe \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/cudbg/cudbg_flash_utils.c optional cxgbe \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/cudbg/cudbg_lib.c optional cxgbe \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/cudbg/cudbg_wtp.c optional cxgbe \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/cudbg/fastlz.c optional cxgbe \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cxgbe/cudbg/fastlz_api.c optional cxgbe \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" t4fw_cfg.c optional cxgbe \ compile-with "${AWK} -f $S/tools/fw_stub.awk t4fw_cfg.fw:t4fw_cfg t4fw_cfg_uwire.fw:t4fw_cfg_uwire t4fw.fw:t4fw -mt4fw_cfg -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "t4fw_cfg.c" t4fw_cfg.fwo optional cxgbe \ dependency "t4fw_cfg.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "t4fw_cfg.fwo" t4fw_cfg.fw optional cxgbe \ dependency "$S/dev/cxgbe/firmware/t4fw_cfg.txt" \ compile-with "${CP} ${.ALLSRC} ${.TARGET}" \ no-obj no-implicit-rule \ clean "t4fw_cfg.fw" t4fw_cfg_uwire.fwo optional cxgbe \ dependency "t4fw_cfg_uwire.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "t4fw_cfg_uwire.fwo" t4fw_cfg_uwire.fw optional cxgbe \ dependency "$S/dev/cxgbe/firmware/t4fw_cfg_uwire.txt" \ compile-with "${CP} ${.ALLSRC} ${.TARGET}" \ no-obj no-implicit-rule \ clean "t4fw_cfg_uwire.fw" t4fw.fwo optional cxgbe \ dependency "t4fw.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "t4fw.fwo" t4fw.fw optional cxgbe \ dependency "$S/dev/cxgbe/firmware/t4fw-1.23.0.0.bin.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "t4fw.fw" t5fw_cfg.c optional cxgbe \ compile-with "${AWK} -f $S/tools/fw_stub.awk t5fw_cfg.fw:t5fw_cfg t5fw_cfg_uwire.fw:t5fw_cfg_uwire t5fw.fw:t5fw -mt5fw_cfg -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "t5fw_cfg.c" t5fw_cfg.fwo optional cxgbe \ dependency "t5fw_cfg.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "t5fw_cfg.fwo" t5fw_cfg.fw optional cxgbe \ dependency "$S/dev/cxgbe/firmware/t5fw_cfg.txt" \ compile-with "${CP} ${.ALLSRC} ${.TARGET}" \ no-obj no-implicit-rule \ clean "t5fw_cfg.fw" t5fw_cfg_uwire.fwo optional cxgbe \ dependency "t5fw_cfg_uwire.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "t5fw_cfg_uwire.fwo" t5fw_cfg_uwire.fw optional cxgbe \ dependency "$S/dev/cxgbe/firmware/t5fw_cfg_uwire.txt" \ compile-with "${CP} ${.ALLSRC} ${.TARGET}" \ no-obj no-implicit-rule \ clean "t5fw_cfg_uwire.fw" t5fw.fwo optional cxgbe \ dependency "t5fw.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "t5fw.fwo" t5fw.fw optional cxgbe \ dependency "$S/dev/cxgbe/firmware/t5fw-1.23.0.0.bin.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "t5fw.fw" t6fw_cfg.c optional cxgbe \ compile-with "${AWK} -f $S/tools/fw_stub.awk t6fw_cfg.fw:t6fw_cfg t6fw_cfg_uwire.fw:t6fw_cfg_uwire t6fw.fw:t6fw -mt6fw_cfg -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "t6fw_cfg.c" t6fw_cfg.fwo optional cxgbe \ dependency "t6fw_cfg.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "t6fw_cfg.fwo" t6fw_cfg.fw optional cxgbe \ dependency "$S/dev/cxgbe/firmware/t6fw_cfg.txt" \ compile-with "${CP} ${.ALLSRC} ${.TARGET}" \ no-obj no-implicit-rule \ clean "t6fw_cfg.fw" t6fw_cfg_uwire.fwo optional cxgbe \ dependency "t6fw_cfg_uwire.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "t6fw_cfg_uwire.fwo" t6fw_cfg_uwire.fw optional cxgbe \ dependency "$S/dev/cxgbe/firmware/t6fw_cfg_uwire.txt" \ compile-with "${CP} ${.ALLSRC} ${.TARGET}" \ no-obj no-implicit-rule \ clean "t6fw_cfg_uwire.fw" t6fw.fwo optional cxgbe \ dependency "t6fw.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "t6fw.fwo" t6fw.fw optional cxgbe \ dependency "$S/dev/cxgbe/firmware/t6fw-1.23.0.0.bin.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "t6fw.fw" dev/cxgbe/crypto/t4_crypto.c optional ccr \ compile-with "${NORMAL_C} -I$S/dev/cxgbe" dev/cy/cy.c optional cy dev/cy/cy_isa.c optional cy isa dev/cy/cy_pci.c optional cy pci dev/cyapa/cyapa.c optional cyapa iicbus dev/dc/if_dc.c optional dc pci dev/dc/dcphy.c optional dc pci dev/dc/pnphy.c optional dc pci dev/dcons/dcons.c optional dcons dev/dcons/dcons_crom.c optional dcons_crom dev/dcons/dcons_os.c optional dcons dev/dme/if_dme.c optional dme dev/drm2/drm_agpsupport.c optional drm2 dev/drm2/drm_auth.c optional drm2 dev/drm2/drm_bufs.c optional drm2 dev/drm2/drm_buffer.c optional drm2 dev/drm2/drm_context.c optional drm2 dev/drm2/drm_crtc.c optional drm2 dev/drm2/drm_crtc_helper.c optional drm2 dev/drm2/drm_dma.c optional drm2 dev/drm2/drm_dp_helper.c optional drm2 dev/drm2/drm_dp_iic_helper.c optional drm2 dev/drm2/drm_drv.c optional drm2 dev/drm2/drm_edid.c optional drm2 dev/drm2/drm_fb_helper.c optional drm2 dev/drm2/drm_fops.c optional drm2 dev/drm2/drm_gem.c optional drm2 dev/drm2/drm_gem_names.c optional drm2 dev/drm2/drm_global.c optional drm2 dev/drm2/drm_hashtab.c optional drm2 dev/drm2/drm_ioctl.c optional drm2 dev/drm2/drm_irq.c optional drm2 dev/drm2/drm_linux_list_sort.c optional drm2 dev/drm2/drm_lock.c optional drm2 dev/drm2/drm_memory.c optional drm2 dev/drm2/drm_mm.c optional drm2 dev/drm2/drm_modes.c optional drm2 dev/drm2/drm_pci.c optional drm2 dev/drm2/drm_platform.c optional drm2 dev/drm2/drm_scatter.c optional drm2 dev/drm2/drm_stub.c optional drm2 dev/drm2/drm_sysctl.c optional drm2 dev/drm2/drm_vm.c optional drm2 dev/drm2/drm_os_freebsd.c optional drm2 dev/drm2/ttm/ttm_agp_backend.c optional drm2 dev/drm2/ttm/ttm_lock.c optional drm2 dev/drm2/ttm/ttm_object.c optional drm2 dev/drm2/ttm/ttm_tt.c optional drm2 dev/drm2/ttm/ttm_bo_util.c optional drm2 dev/drm2/ttm/ttm_bo.c optional drm2 dev/drm2/ttm/ttm_bo_manager.c optional drm2 dev/drm2/ttm/ttm_execbuf_util.c optional drm2 dev/drm2/ttm/ttm_memory.c optional drm2 dev/drm2/ttm/ttm_page_alloc.c optional drm2 dev/drm2/ttm/ttm_bo_vm.c optional drm2 dev/efidev/efidev.c optional efirt dev/efidev/efirt.c optional efirt dev/efidev/efirtc.c optional efirt dev/e1000/if_em.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/em_txrx.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/igb_txrx.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_80003es2lan.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_82540.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_82541.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_82542.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_82543.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_82571.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_82575.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_ich8lan.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_i210.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_api.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_mac.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_manage.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_nvm.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_phy.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_vf.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_mbx.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/e1000/e1000_osdep.c optional em \ compile-with "${NORMAL_C} -I$S/dev/e1000" dev/et/if_et.c optional et dev/ena/ena.c optional ena \ compile-with "${NORMAL_C} -I$S/contrib" dev/ena/ena_sysctl.c optional ena \ compile-with "${NORMAL_C} -I$S/contrib" contrib/ena-com/ena_com.c optional ena contrib/ena-com/ena_eth_com.c optional ena dev/esp/esp_pci.c optional esp pci dev/esp/ncr53c9x.c optional esp dev/etherswitch/arswitch/arswitch.c optional arswitch dev/etherswitch/arswitch/arswitch_reg.c optional arswitch dev/etherswitch/arswitch/arswitch_phy.c optional arswitch dev/etherswitch/arswitch/arswitch_8216.c optional arswitch dev/etherswitch/arswitch/arswitch_8226.c optional arswitch dev/etherswitch/arswitch/arswitch_8316.c optional arswitch dev/etherswitch/arswitch/arswitch_8327.c optional arswitch dev/etherswitch/arswitch/arswitch_7240.c optional arswitch dev/etherswitch/arswitch/arswitch_9340.c optional arswitch dev/etherswitch/arswitch/arswitch_vlans.c optional arswitch dev/etherswitch/etherswitch.c optional etherswitch dev/etherswitch/etherswitch_if.m optional etherswitch dev/etherswitch/ip17x/ip17x.c optional ip17x dev/etherswitch/ip17x/ip175c.c optional ip17x dev/etherswitch/ip17x/ip175d.c optional ip17x dev/etherswitch/ip17x/ip17x_phy.c optional ip17x dev/etherswitch/ip17x/ip17x_vlans.c optional ip17x dev/etherswitch/miiproxy.c optional miiproxy dev/etherswitch/rtl8366/rtl8366rb.c optional rtl8366rb dev/etherswitch/e6000sw/e6000sw.c optional e6000sw dev/etherswitch/e6000sw/e6060sw.c optional e6060sw dev/etherswitch/infineon/adm6996fc.c optional adm6996fc dev/etherswitch/micrel/ksz8995ma.c optional ksz8995ma dev/etherswitch/ukswitch/ukswitch.c optional ukswitch dev/evdev/cdev.c optional evdev dev/evdev/evdev.c optional evdev dev/evdev/evdev_mt.c optional evdev dev/evdev/evdev_utils.c optional evdev dev/evdev/uinput.c optional evdev uinput dev/exca/exca.c optional cbb dev/extres/clk/clk.c optional ext_resources clk fdt dev/extres/clk/clkdev_if.m optional ext_resources clk fdt dev/extres/clk/clknode_if.m optional ext_resources clk fdt dev/extres/clk/clk_bus.c optional ext_resources clk fdt dev/extres/clk/clk_div.c optional ext_resources clk fdt dev/extres/clk/clk_fixed.c optional ext_resources clk fdt dev/extres/clk/clk_gate.c optional ext_resources clk fdt dev/extres/clk/clk_mux.c optional ext_resources clk fdt dev/extres/phy/phy.c optional ext_resources phy fdt dev/extres/phy/phydev_if.m optional ext_resources phy fdt dev/extres/phy/phynode_if.m optional ext_resources phy fdt dev/extres/phy/phy_usb.c optional ext_resources phy fdt dev/extres/phy/phynode_usb_if.m optional ext_resources phy fdt dev/extres/hwreset/hwreset.c optional ext_resources hwreset fdt dev/extres/hwreset/hwreset_if.m optional ext_resources hwreset fdt dev/extres/nvmem/nvmem.c optional ext_resources nvmem fdt dev/extres/nvmem/nvmem_if.m optional ext_resources nvmem fdt dev/extres/regulator/regdev_if.m optional ext_resources regulator fdt dev/extres/regulator/regnode_if.m optional ext_resources regulator fdt dev/extres/regulator/regulator.c optional ext_resources regulator fdt dev/extres/regulator/regulator_bus.c optional ext_resources regulator fdt dev/extres/regulator/regulator_fixed.c optional ext_resources regulator fdt dev/extres/syscon/syscon.c optional ext_resources syscon dev/extres/syscon/syscon_generic.c optional ext_resources syscon fdt dev/extres/syscon/syscon_if.m optional ext_resources syscon dev/fb/fbd.c optional fbd | vt dev/fb/fb_if.m standard dev/fb/splash.c optional sc splash dev/fdt/fdt_clock.c optional fdt fdt_clock dev/fdt/fdt_clock_if.m optional fdt fdt_clock dev/fdt/fdt_common.c optional fdt dev/fdt/fdt_pinctrl.c optional fdt fdt_pinctrl dev/fdt/fdt_pinctrl_if.m optional fdt fdt_pinctrl dev/fdt/fdt_slicer.c optional fdt cfi | fdt mx25l | fdt n25q | fdt at45d dev/fdt/fdt_static_dtb.S optional fdt fdt_dtb_static \ dependency "${FDT_DTS_FILE:T:R}.dtb" dev/fdt/simplebus.c optional fdt dev/fdt/simple_mfd.c optional syscon fdt dev/filemon/filemon.c optional filemon dev/firewire/firewire.c optional firewire dev/firewire/fwcrom.c optional firewire dev/firewire/fwdev.c optional firewire dev/firewire/fwdma.c optional firewire dev/firewire/fwmem.c optional firewire dev/firewire/fwohci.c optional firewire dev/firewire/fwohci_pci.c optional firewire pci dev/firewire/if_fwe.c optional fwe dev/firewire/if_fwip.c optional fwip dev/firewire/sbp.c optional sbp dev/firewire/sbp_targ.c optional sbp_targ dev/flash/at45d.c optional at45d dev/flash/cqspi.c optional cqspi fdt xdma dev/flash/mx25l.c optional mx25l dev/flash/n25q.c optional n25q fdt dev/flash/qspi_if.m optional cqspi fdt | n25q fdt dev/fxp/if_fxp.c optional fxp dev/fxp/inphy.c optional fxp dev/gem/if_gem.c optional gem dev/gem/if_gem_pci.c optional gem pci dev/gem/if_gem_sbus.c optional gem sbus dev/gpio/dwgpio/dwgpio.c optional gpio dwgpio fdt dev/gpio/dwgpio/dwgpio_bus.c optional gpio dwgpio fdt dev/gpio/dwgpio/dwgpio_if.m optional gpio dwgpio fdt dev/gpio/gpiobacklight.c optional gpiobacklight fdt dev/gpio/gpiokeys.c optional gpiokeys fdt dev/gpio/gpiokeys_codes.c optional gpiokeys fdt dev/gpio/gpiobus.c optional gpio \ dependency "gpiobus_if.h" dev/gpio/gpioc.c optional gpio \ dependency "gpio_if.h" dev/gpio/gpioiic.c optional gpioiic dev/gpio/gpioled.c optional gpioled !fdt dev/gpio/gpioled_fdt.c optional gpioled fdt dev/gpio/gpiopower.c optional gpiopower fdt dev/gpio/gpioregulator.c optional gpioregulator fdt ext_resources dev/gpio/gpiospi.c optional gpiospi dev/gpio/gpioths.c optional gpioths dev/gpio/gpio_if.m optional gpio dev/gpio/gpiobus_if.m optional gpio dev/gpio/gpiopps.c optional gpiopps fdt dev/gpio/ofw_gpiobus.c optional fdt gpio dev/hifn/hifn7751.c optional hifn dev/hme/if_hme.c optional hme dev/hme/if_hme_pci.c optional hme pci dev/hme/if_hme_sbus.c optional hme sbus dev/hptiop/hptiop.c optional hptiop scbus dev/hwpmc/hwpmc_logging.c optional hwpmc dev/hwpmc/hwpmc_mod.c optional hwpmc dev/hwpmc/hwpmc_soft.c optional hwpmc dev/ichiic/ig4_acpi.c optional ig4 acpi iicbus dev/ichiic/ig4_iic.c optional ig4 iicbus dev/ichiic/ig4_pci.c optional ig4 pci iicbus dev/ichsmb/ichsmb.c optional ichsmb dev/ichsmb/ichsmb_pci.c optional ichsmb pci dev/ida/ida.c optional ida dev/ida/ida_disk.c optional ida dev/ida/ida_pci.c optional ida pci dev/iicbus/ad7418.c optional ad7418 dev/iicbus/ads111x.c optional ads111x dev/iicbus/ds1307.c optional ds1307 dev/iicbus/ds13rtc.c optional ds13rtc | ds133x | ds1374 dev/iicbus/ds1672.c optional ds1672 dev/iicbus/ds3231.c optional ds3231 dev/iicbus/rtc8583.c optional rtc8583 dev/iicbus/syr827.c optional syr827 ext_resources fdt dev/iicbus/icee.c optional icee dev/iicbus/if_ic.c optional ic dev/iicbus/iic.c optional iic dev/iicbus/iic_recover_bus.c optional iicbus dev/iicbus/iicbb.c optional iicbb dev/iicbus/iicbb_if.m optional iicbb dev/iicbus/iicbus.c optional iicbus dev/iicbus/iicbus_if.m optional iicbus dev/iicbus/iiconf.c optional iicbus dev/iicbus/iicsmb.c optional iicsmb \ dependency "iicbus_if.h" dev/iicbus/iicoc.c optional iicoc dev/iicbus/isl12xx.c optional isl12xx dev/iicbus/lm75.c optional lm75 dev/iicbus/nxprtc.c optional nxprtc | pcf8563 dev/iicbus/ofw_iicbus.c optional fdt iicbus dev/iicbus/rtc8583.c optional rtc8583 dev/iicbus/s35390a.c optional s35390a dev/iicbus/sy8106a.c optional sy8106a ext_resources fdt dev/iir/iir.c optional iir dev/iir/iir_ctrl.c optional iir dev/iir/iir_pci.c optional iir pci dev/intpm/intpm.c optional intpm pci # XXX Work around clang warning, until maintainer approves fix. dev/ips/ips.c optional ips \ compile-with "${NORMAL_C} ${NO_WSOMETIMES_UNINITIALIZED}" dev/ips/ips_commands.c optional ips dev/ips/ips_disk.c optional ips dev/ips/ips_ioctl.c optional ips dev/ips/ips_pci.c optional ips pci dev/ipw/if_ipw.c optional ipw ipwbssfw.c optional ipwbssfw | ipwfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk ipw_bss.fw:ipw_bss:130 -lintel_ipw -mipw_bss -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "ipwbssfw.c" ipw_bss.fwo optional ipwbssfw | ipwfw \ dependency "ipw_bss.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "ipw_bss.fwo" ipw_bss.fw optional ipwbssfw | ipwfw \ dependency "$S/contrib/dev/ipw/ipw2100-1.3.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "ipw_bss.fw" ipwibssfw.c optional ipwibssfw | ipwfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk ipw_ibss.fw:ipw_ibss:130 -lintel_ipw -mipw_ibss -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "ipwibssfw.c" ipw_ibss.fwo optional ipwibssfw | ipwfw \ dependency "ipw_ibss.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "ipw_ibss.fwo" ipw_ibss.fw optional ipwibssfw | ipwfw \ dependency "$S/contrib/dev/ipw/ipw2100-1.3-i.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "ipw_ibss.fw" ipwmonitorfw.c optional ipwmonitorfw | ipwfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk ipw_monitor.fw:ipw_monitor:130 -lintel_ipw -mipw_monitor -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "ipwmonitorfw.c" ipw_monitor.fwo optional ipwmonitorfw | ipwfw \ dependency "ipw_monitor.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "ipw_monitor.fwo" ipw_monitor.fw optional ipwmonitorfw | ipwfw \ dependency "$S/contrib/dev/ipw/ipw2100-1.3-p.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "ipw_monitor.fw" dev/iscsi/icl.c optional iscsi dev/iscsi/icl_conn_if.m optional cfiscsi | iscsi dev/iscsi/icl_soft.c optional iscsi dev/iscsi/icl_soft_proxy.c optional iscsi dev/iscsi/iscsi.c optional iscsi scbus dev/iscsi_initiator/iscsi.c optional iscsi_initiator scbus dev/iscsi_initiator/iscsi_subr.c optional iscsi_initiator scbus dev/iscsi_initiator/isc_cam.c optional iscsi_initiator scbus dev/iscsi_initiator/isc_soc.c optional iscsi_initiator scbus dev/iscsi_initiator/isc_sm.c optional iscsi_initiator scbus dev/iscsi_initiator/isc_subr.c optional iscsi_initiator scbus dev/ismt/ismt.c optional ismt dev/isl/isl.c optional isl iicbus dev/isp/isp.c optional isp dev/isp/isp_freebsd.c optional isp dev/isp/isp_library.c optional isp dev/isp/isp_pci.c optional isp pci dev/isp/isp_sbus.c optional isp sbus dev/isp/isp_target.c optional isp dev/ispfw/ispfw.c optional ispfw dev/iwi/if_iwi.c optional iwi iwibssfw.c optional iwibssfw | iwifw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwi_bss.fw:iwi_bss:300 -lintel_iwi -miwi_bss -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwibssfw.c" iwi_bss.fwo optional iwibssfw | iwifw \ dependency "iwi_bss.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwi_bss.fwo" iwi_bss.fw optional iwibssfw | iwifw \ dependency "$S/contrib/dev/iwi/ipw2200-bss.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwi_bss.fw" iwiibssfw.c optional iwiibssfw | iwifw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwi_ibss.fw:iwi_ibss:300 -lintel_iwi -miwi_ibss -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwiibssfw.c" iwi_ibss.fwo optional iwiibssfw | iwifw \ dependency "iwi_ibss.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwi_ibss.fwo" iwi_ibss.fw optional iwiibssfw | iwifw \ dependency "$S/contrib/dev/iwi/ipw2200-ibss.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwi_ibss.fw" iwimonitorfw.c optional iwimonitorfw | iwifw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwi_monitor.fw:iwi_monitor:300 -lintel_iwi -miwi_monitor -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwimonitorfw.c" iwi_monitor.fwo optional iwimonitorfw | iwifw \ dependency "iwi_monitor.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwi_monitor.fwo" iwi_monitor.fw optional iwimonitorfw | iwifw \ dependency "$S/contrib/dev/iwi/ipw2200-sniffer.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwi_monitor.fw" dev/iwm/if_iwm.c optional iwm dev/iwm/if_iwm_7000.c optional iwm dev/iwm/if_iwm_8000.c optional iwm dev/iwm/if_iwm_binding.c optional iwm dev/iwm/if_iwm_fw.c optional iwm dev/iwm/if_iwm_led.c optional iwm dev/iwm/if_iwm_mac_ctxt.c optional iwm dev/iwm/if_iwm_notif_wait.c optional iwm dev/iwm/if_iwm_pcie_trans.c optional iwm dev/iwm/if_iwm_phy_ctxt.c optional iwm dev/iwm/if_iwm_phy_db.c optional iwm dev/iwm/if_iwm_power.c optional iwm dev/iwm/if_iwm_scan.c optional iwm dev/iwm/if_iwm_sf.c optional iwm dev/iwm/if_iwm_sta.c optional iwm dev/iwm/if_iwm_time_event.c optional iwm dev/iwm/if_iwm_util.c optional iwm iwm3160fw.c optional iwm3160fw | iwmfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwm3160.fw:iwm3160fw -miwm3160fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwm3160fw.c" iwm3160fw.fwo optional iwm3160fw | iwmfw \ dependency "iwm3160.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwm3160fw.fwo" iwm3160.fw optional iwm3160fw | iwmfw \ dependency "$S/contrib/dev/iwm/iwm-3160-17.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwm3160.fw" iwm3168fw.c optional iwm3168fw | iwmfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwm3168.fw:iwm3168fw -miwm3168fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwm3168fw.c" iwm3168fw.fwo optional iwm3168fw | iwmfw \ dependency "iwm3168.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwm3168fw.fwo" iwm3168.fw optional iwm3168fw | iwmfw \ dependency "$S/contrib/dev/iwm/iwm-3168-22.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwm3168.fw" iwm7260fw.c optional iwm7260fw | iwmfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwm7260.fw:iwm7260fw -miwm7260fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwm7260fw.c" iwm7260fw.fwo optional iwm7260fw | iwmfw \ dependency "iwm7260.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwm7260fw.fwo" iwm7260.fw optional iwm7260fw | iwmfw \ dependency "$S/contrib/dev/iwm/iwm-7260-17.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwm7260.fw" iwm7265fw.c optional iwm7265fw | iwmfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwm7265.fw:iwm7265fw -miwm7265fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwm7265fw.c" iwm7265fw.fwo optional iwm7265fw | iwmfw \ dependency "iwm7265.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwm7265fw.fwo" iwm7265.fw optional iwm7265fw | iwmfw \ dependency "$S/contrib/dev/iwm/iwm-7265-17.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwm7265.fw" iwm7265Dfw.c optional iwm7265Dfw | iwmfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwm7265D.fw:iwm7265Dfw -miwm7265Dfw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwm7265Dfw.c" iwm7265Dfw.fwo optional iwm7265Dfw | iwmfw \ dependency "iwm7265D.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwm7265Dfw.fwo" iwm7265D.fw optional iwm7265Dfw | iwmfw \ dependency "$S/contrib/dev/iwm/iwm-7265D-17.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwm7265D.fw" iwm8000Cfw.c optional iwm8000Cfw | iwmfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwm8000C.fw:iwm8000Cfw -miwm8000Cfw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwm8000Cfw.c" iwm8000Cfw.fwo optional iwm8000Cfw | iwmfw \ dependency "iwm8000C.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwm8000Cfw.fwo" iwm8000C.fw optional iwm8000Cfw | iwmfw \ dependency "$S/contrib/dev/iwm/iwm-8000C-16.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwm8000C.fw" iwm8265.fw optional iwm8265fw | iwmfw \ dependency "$S/contrib/dev/iwm/iwm-8265-22.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwm8265.fw" iwm8265fw.c optional iwm8265fw | iwmfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwm8265.fw:iwm8265fw -miwm8265fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwm8265fw.c" iwm8265fw.fwo optional iwm8265fw | iwmfw \ dependency "iwm8265.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwm8265fw.fwo" dev/iwn/if_iwn.c optional iwn iwn1000fw.c optional iwn1000fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn1000.fw:iwn1000fw -miwn1000fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn1000fw.c" iwn1000fw.fwo optional iwn1000fw | iwnfw \ dependency "iwn1000.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn1000fw.fwo" iwn1000.fw optional iwn1000fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-1000-39.31.5.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn1000.fw" iwn100fw.c optional iwn100fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn100.fw:iwn100fw -miwn100fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn100fw.c" iwn100fw.fwo optional iwn100fw | iwnfw \ dependency "iwn100.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn100fw.fwo" iwn100.fw optional iwn100fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-100-39.31.5.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn100.fw" iwn105fw.c optional iwn105fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn105.fw:iwn105fw -miwn105fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn105fw.c" iwn105fw.fwo optional iwn105fw | iwnfw \ dependency "iwn105.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn105fw.fwo" iwn105.fw optional iwn105fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-105-6-18.168.6.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn105.fw" iwn135fw.c optional iwn135fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn135.fw:iwn135fw -miwn135fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn135fw.c" iwn135fw.fwo optional iwn135fw | iwnfw \ dependency "iwn135.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn135fw.fwo" iwn135.fw optional iwn135fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-135-6-18.168.6.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn135.fw" iwn2000fw.c optional iwn2000fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn2000.fw:iwn2000fw -miwn2000fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn2000fw.c" iwn2000fw.fwo optional iwn2000fw | iwnfw \ dependency "iwn2000.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn2000fw.fwo" iwn2000.fw optional iwn2000fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-2000-18.168.6.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn2000.fw" iwn2030fw.c optional iwn2030fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn2030.fw:iwn2030fw -miwn2030fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn2030fw.c" iwn2030fw.fwo optional iwn2030fw | iwnfw \ dependency "iwn2030.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn2030fw.fwo" iwn2030.fw optional iwn2030fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwnwifi-2030-18.168.6.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn2030.fw" iwn4965fw.c optional iwn4965fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn4965.fw:iwn4965fw -miwn4965fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn4965fw.c" iwn4965fw.fwo optional iwn4965fw | iwnfw \ dependency "iwn4965.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn4965fw.fwo" iwn4965.fw optional iwn4965fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-4965-228.61.2.24.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn4965.fw" iwn5000fw.c optional iwn5000fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn5000.fw:iwn5000fw -miwn5000fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn5000fw.c" iwn5000fw.fwo optional iwn5000fw | iwnfw \ dependency "iwn5000.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn5000fw.fwo" iwn5000.fw optional iwn5000fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-5000-8.83.5.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn5000.fw" iwn5150fw.c optional iwn5150fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn5150.fw:iwn5150fw -miwn5150fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn5150fw.c" iwn5150fw.fwo optional iwn5150fw | iwnfw \ dependency "iwn5150.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn5150fw.fwo" iwn5150.fw optional iwn5150fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-5150-8.24.2.2.fw.uu"\ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn5150.fw" iwn6000fw.c optional iwn6000fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn6000.fw:iwn6000fw -miwn6000fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn6000fw.c" iwn6000fw.fwo optional iwn6000fw | iwnfw \ dependency "iwn6000.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn6000fw.fwo" iwn6000.fw optional iwn6000fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-6000-9.221.4.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn6000.fw" iwn6000g2afw.c optional iwn6000g2afw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn6000g2a.fw:iwn6000g2afw -miwn6000g2afw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn6000g2afw.c" iwn6000g2afw.fwo optional iwn6000g2afw | iwnfw \ dependency "iwn6000g2a.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn6000g2afw.fwo" iwn6000g2a.fw optional iwn6000g2afw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-6000g2a-18.168.6.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn6000g2a.fw" iwn6000g2bfw.c optional iwn6000g2bfw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn6000g2b.fw:iwn6000g2bfw -miwn6000g2bfw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn6000g2bfw.c" iwn6000g2bfw.fwo optional iwn6000g2bfw | iwnfw \ dependency "iwn6000g2b.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn6000g2bfw.fwo" iwn6000g2b.fw optional iwn6000g2bfw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-6000g2b-18.168.6.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn6000g2b.fw" iwn6050fw.c optional iwn6050fw | iwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk iwn6050.fw:iwn6050fw -miwn6050fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "iwn6050fw.c" iwn6050fw.fwo optional iwn6050fw | iwnfw \ dependency "iwn6050.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "iwn6050fw.fwo" iwn6050.fw optional iwn6050fw | iwnfw \ dependency "$S/contrib/dev/iwn/iwlwifi-6050-41.28.5.1.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "iwn6050.fw" dev/ixgbe/if_ix.c optional ix inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe -DSMP" dev/ixgbe/if_ixv.c optional ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe -DSMP" dev/ixgbe/if_bypass.c optional ix inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/if_fdir.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/if_sriov.c optional ix inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ix_txrx.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_osdep.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_phy.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_api.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_common.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_mbx.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_vf.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_82598.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_82599.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_x540.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_x550.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_dcb.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_dcb_82598.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/ixgbe/ixgbe_dcb_82599.c optional ix inet | ixv inet \ compile-with "${NORMAL_C} -I$S/dev/ixgbe" dev/jedec_dimm/jedec_dimm.c optional jedec_dimm smbus dev/jme/if_jme.c optional jme pci dev/kbd/kbd.c optional atkbd | pckbd | sc | ukbd | vt dev/kbdmux/kbdmux.c optional kbdmux dev/ksyms/ksyms.c optional ksyms dev/le/am7990.c optional le dev/le/am79900.c optional le dev/le/if_le_pci.c optional le pci dev/le/lance.c optional le dev/led/led.c standard dev/lge/if_lge.c optional lge dev/liquidio/base/cn23xx_pf_device.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/base/lio_console.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/base/lio_ctrl.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/base/lio_device.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/base/lio_droq.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/base/lio_mem_ops.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/base/lio_request_manager.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/base/lio_response_manager.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/lio_core.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/lio_ioctl.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/lio_main.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/lio_rss.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/lio_rxtx.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" dev/liquidio/lio_sysctl.c optional lio \ compile-with "${NORMAL_C} \ -I$S/dev/liquidio -I$S/dev/liquidio/base -DSMP" lio.c optional lio \ compile-with "${AWK} -f $S/tools/fw_stub.awk lio_23xx_nic.bin.fw:lio_23xx_nic.bin -mlio_23xx_nic.bin -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "lio.c" lio_23xx_nic.bin.fw.fwo optional lio \ dependency "lio_23xx_nic.bin.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "lio_23xx_nic.bin.fw.fwo" lio_23xx_nic.bin.fw optional lio \ dependency "$S/contrib/dev/liquidio/lio_23xx_nic.bin.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "lio_23xx_nic.bin.fw" dev/malo/if_malo.c optional malo dev/malo/if_malohal.c optional malo dev/malo/if_malo_pci.c optional malo pci dev/mc146818/mc146818.c optional mc146818 dev/md/md.c optional md dev/mdio/mdio_if.m optional miiproxy | mdio dev/mdio/mdio.c optional miiproxy | mdio dev/mem/memdev.c optional mem dev/mem/memutil.c optional mem dev/mfi/mfi.c optional mfi dev/mfi/mfi_debug.c optional mfi dev/mfi/mfi_pci.c optional mfi pci dev/mfi/mfi_disk.c optional mfi dev/mfi/mfi_syspd.c optional mfi dev/mfi/mfi_tbolt.c optional mfi dev/mfi/mfi_linux.c optional mfi compat_linux dev/mfi/mfi_cam.c optional mfip scbus dev/mii/acphy.c optional miibus | acphy dev/mii/amphy.c optional miibus | amphy dev/mii/atphy.c optional miibus | atphy dev/mii/axphy.c optional miibus | axphy dev/mii/bmtphy.c optional miibus | bmtphy dev/mii/brgphy.c optional miibus | brgphy dev/mii/ciphy.c optional miibus | ciphy dev/mii/e1000phy.c optional miibus | e1000phy dev/mii/gentbi.c optional miibus | gentbi dev/mii/icsphy.c optional miibus | icsphy dev/mii/ip1000phy.c optional miibus | ip1000phy dev/mii/jmphy.c optional miibus | jmphy dev/mii/lxtphy.c optional miibus | lxtphy dev/mii/micphy.c optional miibus fdt | micphy fdt dev/mii/mii.c optional miibus | mii dev/mii/mii_bitbang.c optional miibus | mii_bitbang dev/mii/mii_physubr.c optional miibus | mii dev/mii/mii_fdt.c optional miibus fdt | mii fdt dev/mii/miibus_if.m optional miibus | mii dev/mii/mlphy.c optional miibus | mlphy dev/mii/nsgphy.c optional miibus | nsgphy dev/mii/nsphy.c optional miibus | nsphy dev/mii/nsphyter.c optional miibus | nsphyter dev/mii/pnaphy.c optional miibus | pnaphy dev/mii/qsphy.c optional miibus | qsphy dev/mii/rdcphy.c optional miibus | rdcphy dev/mii/rgephy.c optional miibus | rgephy dev/mii/rlphy.c optional miibus | rlphy dev/mii/rlswitch.c optional rlswitch dev/mii/smcphy.c optional miibus | smcphy dev/mii/smscphy.c optional miibus | smscphy dev/mii/tdkphy.c optional miibus | tdkphy dev/mii/tlphy.c optional miibus | tlphy dev/mii/truephy.c optional miibus | truephy dev/mii/ukphy.c optional miibus | mii dev/mii/ukphy_subr.c optional miibus | mii dev/mii/vscphy.c optional miibus | vscphy dev/mii/xmphy.c optional miibus | xmphy dev/mk48txx/mk48txx.c optional mk48txx dev/mlxfw/mlxfw_fsm.c optional mlxfw \ compile-with "${MLXFW_C}" dev/mlxfw/mlxfw_mfa2.c optional mlxfw \ compile-with "${MLXFW_C}" dev/mlxfw/mlxfw_mfa2_tlv_multi.c optional mlxfw \ compile-with "${MLXFW_C}" dev/mlx/mlx.c optional mlx dev/mlx/mlx_disk.c optional mlx dev/mlx/mlx_pci.c optional mlx pci dev/mly/mly.c optional mly dev/mmc/mmc_subr.c optional mmc | mmcsd !mmccam dev/mmc/mmc.c optional mmc !mmccam dev/mmc/mmcbr_if.m standard dev/mmc/mmcbus_if.m standard dev/mmc/mmcsd.c optional mmcsd !mmccam dev/mmcnull/mmcnull.c optional mmcnull dev/mn/if_mn.c optional mn pci dev/mpr/mpr.c optional mpr dev/mpr/mpr_config.c optional mpr # XXX Work around clang warning, until maintainer approves fix. dev/mpr/mpr_mapping.c optional mpr \ compile-with "${NORMAL_C} ${NO_WSOMETIMES_UNINITIALIZED}" dev/mpr/mpr_pci.c optional mpr pci dev/mpr/mpr_sas.c optional mpr \ compile-with "${NORMAL_C} ${NO_WUNNEEDED_INTERNAL_DECL}" dev/mpr/mpr_sas_lsi.c optional mpr dev/mpr/mpr_table.c optional mpr dev/mpr/mpr_user.c optional mpr dev/mps/mps.c optional mps dev/mps/mps_config.c optional mps # XXX Work around clang warning, until maintainer approves fix. dev/mps/mps_mapping.c optional mps \ compile-with "${NORMAL_C} ${NO_WSOMETIMES_UNINITIALIZED}" dev/mps/mps_pci.c optional mps pci dev/mps/mps_sas.c optional mps \ compile-with "${NORMAL_C} ${NO_WUNNEEDED_INTERNAL_DECL}" dev/mps/mps_sas_lsi.c optional mps dev/mps/mps_table.c optional mps dev/mps/mps_user.c optional mps dev/mpt/mpt.c optional mpt dev/mpt/mpt_cam.c optional mpt dev/mpt/mpt_debug.c optional mpt dev/mpt/mpt_pci.c optional mpt pci dev/mpt/mpt_raid.c optional mpt dev/mpt/mpt_user.c optional mpt dev/mrsas/mrsas.c optional mrsas dev/mrsas/mrsas_cam.c optional mrsas dev/mrsas/mrsas_ioctl.c optional mrsas dev/mrsas/mrsas_fp.c optional mrsas dev/msk/if_msk.c optional msk dev/mvs/mvs.c optional mvs dev/mvs/mvs_if.m optional mvs dev/mvs/mvs_pci.c optional mvs pci dev/mwl/if_mwl.c optional mwl dev/mwl/if_mwl_pci.c optional mwl pci dev/mwl/mwlhal.c optional mwl mwlfw.c optional mwlfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk mw88W8363.fw:mw88W8363fw mwlboot.fw:mwlboot -mmwl -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "mwlfw.c" mw88W8363.fwo optional mwlfw \ dependency "mw88W8363.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "mw88W8363.fwo" mw88W8363.fw optional mwlfw \ dependency "$S/contrib/dev/mwl/mw88W8363.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "mw88W8363.fw" mwlboot.fwo optional mwlfw \ dependency "mwlboot.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "mwlboot.fwo" mwlboot.fw optional mwlfw \ dependency "$S/contrib/dev/mwl/mwlboot.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "mwlboot.fw" dev/mxge/if_mxge.c optional mxge pci dev/mxge/mxge_eth_z8e.c optional mxge pci dev/mxge/mxge_ethp_z8e.c optional mxge pci dev/mxge/mxge_rss_eth_z8e.c optional mxge pci dev/mxge/mxge_rss_ethp_z8e.c optional mxge pci dev/my/if_my.c optional my dev/netmap/if_ptnet.c optional netmap inet dev/netmap/netmap.c optional netmap dev/netmap/netmap_bdg.c optional netmap dev/netmap/netmap_freebsd.c optional netmap dev/netmap/netmap_generic.c optional netmap dev/netmap/netmap_kloop.c optional netmap dev/netmap/netmap_legacy.c optional netmap dev/netmap/netmap_mbq.c optional netmap dev/netmap/netmap_mem2.c optional netmap dev/netmap/netmap_monitor.c optional netmap dev/netmap/netmap_null.c optional netmap dev/netmap/netmap_offloadings.c optional netmap dev/netmap/netmap_pipe.c optional netmap dev/netmap/netmap_vale.c optional netmap # compile-with "${NORMAL_C} -Wconversion -Wextra" dev/nfsmb/nfsmb.c optional nfsmb pci dev/nge/if_nge.c optional nge dev/nmdm/nmdm.c optional nmdm dev/null/null.c standard dev/nvd/nvd.c optional nvd nvme dev/nvme/nvme.c optional nvme dev/nvme/nvme_ahci.c optional nvme ahci dev/nvme/nvme_ctrlr.c optional nvme dev/nvme/nvme_ctrlr_cmd.c optional nvme dev/nvme/nvme_ns.c optional nvme dev/nvme/nvme_ns_cmd.c optional nvme dev/nvme/nvme_pci.c optional nvme pci dev/nvme/nvme_qpair.c optional nvme dev/nvme/nvme_sim.c optional nvme scbus dev/nvme/nvme_sysctl.c optional nvme dev/nvme/nvme_test.c optional nvme dev/nvme/nvme_util.c optional nvme dev/oce/oce_hw.c optional oce pci dev/oce/oce_if.c optional oce pci dev/oce/oce_mbox.c optional oce pci dev/oce/oce_queue.c optional oce pci dev/oce/oce_sysctl.c optional oce pci dev/oce/oce_util.c optional oce pci dev/ocs_fc/ocs_pci.c optional ocs_fc pci dev/ocs_fc/ocs_ioctl.c optional ocs_fc pci dev/ocs_fc/ocs_os.c optional ocs_fc pci dev/ocs_fc/ocs_utils.c optional ocs_fc pci dev/ocs_fc/ocs_hw.c optional ocs_fc pci dev/ocs_fc/ocs_hw_queues.c optional ocs_fc pci dev/ocs_fc/sli4.c optional ocs_fc pci dev/ocs_fc/ocs_sm.c optional ocs_fc pci dev/ocs_fc/ocs_device.c optional ocs_fc pci dev/ocs_fc/ocs_xport.c optional ocs_fc pci dev/ocs_fc/ocs_domain.c optional ocs_fc pci dev/ocs_fc/ocs_sport.c optional ocs_fc pci dev/ocs_fc/ocs_els.c optional ocs_fc pci dev/ocs_fc/ocs_fabric.c optional ocs_fc pci dev/ocs_fc/ocs_io.c optional ocs_fc pci dev/ocs_fc/ocs_node.c optional ocs_fc pci dev/ocs_fc/ocs_scsi.c optional ocs_fc pci dev/ocs_fc/ocs_unsol.c optional ocs_fc pci dev/ocs_fc/ocs_ddump.c optional ocs_fc pci dev/ocs_fc/ocs_mgmt.c optional ocs_fc pci dev/ocs_fc/ocs_cam.c optional ocs_fc pci dev/ofw/ofw_bus_if.m optional fdt dev/ofw/ofw_bus_subr.c optional fdt dev/ofw/ofw_cpu.c optional fdt dev/ofw/ofw_fdt.c optional fdt dev/ofw/ofw_if.m optional fdt dev/ofw/ofw_graph.c optional fdt dev/ofw/ofw_subr.c optional fdt dev/ofw/ofwbus.c optional fdt dev/ofw/openfirm.c optional fdt dev/ofw/openfirmio.c optional fdt dev/ow/ow.c optional ow \ dependency "owll_if.h" \ dependency "own_if.h" dev/ow/owll_if.m optional ow dev/ow/own_if.m optional ow dev/ow/ow_temp.c optional ow_temp dev/ow/owc_gpiobus.c optional owc gpio dev/pbio/pbio.c optional pbio isa dev/pccard/card_if.m standard dev/pccard/pccard.c optional pccard dev/pccard/pccard_cis.c optional pccard dev/pccard/pccard_cis_quirks.c optional pccard dev/pccard/pccard_device.c optional pccard dev/pccard/power_if.m standard dev/pccbb/pccbb.c optional cbb dev/pccbb/pccbb_isa.c optional cbb isa dev/pccbb/pccbb_pci.c optional cbb pci dev/pcf/pcf.c optional pcf dev/pci/fixup_pci.c optional pci dev/pci/hostb_pci.c optional pci dev/pci/ignore_pci.c optional pci dev/pci/isa_pci.c optional pci isa dev/pci/pci.c optional pci dev/pci/pci_if.m standard dev/pci/pci_iov.c optional pci pci_iov dev/pci/pci_iov_if.m standard dev/pci/pci_iov_schema.c optional pci pci_iov dev/pci/pci_pci.c optional pci dev/pci/pci_subr.c optional pci dev/pci/pci_user.c optional pci dev/pci/pcib_if.m standard dev/pci/pcib_support.c standard dev/pci/vga_pci.c optional pci dev/pms/freebsd/driver/ini/src/agtiapi.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/sadisc.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/mpi.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/saframe.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/sahw.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/sainit.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/saint.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/sampicmd.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/sampirsp.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/saphy.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/saport.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/sasata.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/sasmp.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/sassp.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/satimer.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/sautil.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/saioctlcmd.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sallsdk/spc/mpidebug.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/discovery/dm/dminit.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/discovery/dm/dmsmp.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/discovery/dm/dmdisc.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/discovery/dm/dmport.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/discovery/dm/dmtimer.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/discovery/dm/dmmisc.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sat/src/sminit.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sat/src/smmisc.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sat/src/smsat.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sat/src/smsatcb.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sat/src/smsathw.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/sat/src/smtimer.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/tdinit.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/tdmisc.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/tdesgl.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/tdport.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/tdint.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/tdioctl.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/tdhw.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/ossacmnapi.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/tddmcmnapi.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/tdsmcmnapi.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/common/tdtimers.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/sas/ini/itdio.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/sas/ini/itdcb.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/sas/ini/itdinit.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/sas/ini/itddisc.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/sata/host/sat.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/sata/host/ossasat.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/pms/RefTisa/tisa/sassata/sata/host/sathw.c optional pmspcv \ compile-with "${NORMAL_C} -Wunused-variable -Woverflow -Wparentheses -w" dev/ppbus/if_plip.c optional plip dev/ppbus/immio.c optional vpo dev/ppbus/lpbb.c optional lpbb dev/ppbus/lpt.c optional lpt dev/ppbus/pcfclock.c optional pcfclock dev/ppbus/ppb_1284.c optional ppbus dev/ppbus/ppb_base.c optional ppbus dev/ppbus/ppb_msq.c optional ppbus dev/ppbus/ppbconf.c optional ppbus dev/ppbus/ppbus_if.m optional ppbus dev/ppbus/ppi.c optional ppi dev/ppbus/pps.c optional pps dev/ppbus/vpo.c optional vpo dev/ppbus/vpoio.c optional vpo dev/ppc/ppc.c optional ppc dev/ppc/ppc_acpi.c optional ppc acpi dev/ppc/ppc_isa.c optional ppc isa dev/ppc/ppc_pci.c optional ppc pci dev/ppc/ppc_puc.c optional ppc puc dev/proto/proto_bus_isa.c optional proto acpi | proto isa dev/proto/proto_bus_pci.c optional proto pci dev/proto/proto_busdma.c optional proto dev/proto/proto_core.c optional proto dev/pst/pst-iop.c optional pst dev/pst/pst-pci.c optional pst pci dev/pst/pst-raid.c optional pst dev/pty/pty.c optional pty dev/puc/puc.c optional puc dev/puc/puc_cfg.c optional puc dev/puc/puc_pccard.c optional puc pccard dev/puc/puc_pci.c optional puc pci dev/pwm/pwmc.c optional pwm | pwmc dev/pwm/pwmbus.c optional pwm | pwmbus dev/pwm/pwmbus_if.m optional pwm | pwmbus dev/pwm/ofw_pwm.c optional pwm fdt | pwmbus fdt dev/pwm/ofw_pwmbus.c optional pwm fdt | pwmbus fdt dev/quicc/quicc_core.c optional quicc dev/ral/rt2560.c optional ral dev/ral/rt2661.c optional ral dev/ral/rt2860.c optional ral dev/ral/if_ral_pci.c optional ral pci rt2561fw.c optional rt2561fw | ralfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rt2561.fw:rt2561fw -mrt2561 -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rt2561fw.c" rt2561fw.fwo optional rt2561fw | ralfw \ dependency "rt2561.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rt2561fw.fwo" rt2561.fw optional rt2561fw | ralfw \ dependency "$S/contrib/dev/ral/rt2561.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rt2561.fw" rt2561sfw.c optional rt2561sfw | ralfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rt2561s.fw:rt2561sfw -mrt2561s -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rt2561sfw.c" rt2561sfw.fwo optional rt2561sfw | ralfw \ dependency "rt2561s.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rt2561sfw.fwo" rt2561s.fw optional rt2561sfw | ralfw \ dependency "$S/contrib/dev/ral/rt2561s.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rt2561s.fw" rt2661fw.c optional rt2661fw | ralfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rt2661.fw:rt2661fw -mrt2661 -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rt2661fw.c" rt2661fw.fwo optional rt2661fw | ralfw \ dependency "rt2661.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rt2661fw.fwo" rt2661.fw optional rt2661fw | ralfw \ dependency "$S/contrib/dev/ral/rt2661.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rt2661.fw" rt2860fw.c optional rt2860fw | ralfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rt2860.fw:rt2860fw -mrt2860 -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rt2860fw.c" rt2860fw.fwo optional rt2860fw | ralfw \ dependency "rt2860.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rt2860fw.fwo" rt2860.fw optional rt2860fw | ralfw \ dependency "$S/contrib/dev/ral/rt2860.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rt2860.fw" dev/random/random_infra.c standard dev/random/random_harvestq.c standard dev/random/randomdev.c optional !random_loadable dev/random/fortuna.c optional !random_loadable dev/random/hash.c optional !random_loadable dev/rc/rc.c optional rc dev/rccgpio/rccgpio.c optional rccgpio gpio dev/re/if_re.c optional re dev/rl/if_rl.c optional rl pci dev/rndtest/rndtest.c optional rndtest dev/rp/rp.c optional rp dev/rp/rp_isa.c optional rp isa dev/rp/rp_pci.c optional rp pci # dev/rtwn/if_rtwn.c optional rtwn dev/rtwn/if_rtwn_beacon.c optional rtwn dev/rtwn/if_rtwn_calib.c optional rtwn dev/rtwn/if_rtwn_cam.c optional rtwn dev/rtwn/if_rtwn_efuse.c optional rtwn dev/rtwn/if_rtwn_fw.c optional rtwn dev/rtwn/if_rtwn_rx.c optional rtwn dev/rtwn/if_rtwn_task.c optional rtwn dev/rtwn/if_rtwn_tx.c optional rtwn # dev/rtwn/pci/rtwn_pci_attach.c optional rtwn_pci pci dev/rtwn/pci/rtwn_pci_reg.c optional rtwn_pci pci dev/rtwn/pci/rtwn_pci_rx.c optional rtwn_pci pci dev/rtwn/pci/rtwn_pci_tx.c optional rtwn_pci pci # dev/rtwn/usb/rtwn_usb_attach.c optional rtwn_usb dev/rtwn/usb/rtwn_usb_ep.c optional rtwn_usb dev/rtwn/usb/rtwn_usb_reg.c optional rtwn_usb dev/rtwn/usb/rtwn_usb_rx.c optional rtwn_usb dev/rtwn/usb/rtwn_usb_tx.c optional rtwn_usb # RTL8188E dev/rtwn/rtl8188e/r88e_beacon.c optional rtwn dev/rtwn/rtl8188e/r88e_calib.c optional rtwn dev/rtwn/rtl8188e/r88e_chan.c optional rtwn dev/rtwn/rtl8188e/r88e_fw.c optional rtwn dev/rtwn/rtl8188e/r88e_init.c optional rtwn dev/rtwn/rtl8188e/r88e_led.c optional rtwn dev/rtwn/rtl8188e/r88e_tx.c optional rtwn dev/rtwn/rtl8188e/r88e_rf.c optional rtwn dev/rtwn/rtl8188e/r88e_rom.c optional rtwn dev/rtwn/rtl8188e/r88e_rx.c optional rtwn dev/rtwn/rtl8188e/pci/r88ee_attach.c optional rtwn_pci pci dev/rtwn/rtl8188e/pci/r88ee_init.c optional rtwn_pci pci dev/rtwn/rtl8188e/pci/r88ee_rx.c optional rtwn_pci pci dev/rtwn/rtl8188e/usb/r88eu_attach.c optional rtwn_usb dev/rtwn/rtl8188e/usb/r88eu_init.c optional rtwn_usb # RTL8192C dev/rtwn/rtl8192c/r92c_attach.c optional rtwn dev/rtwn/rtl8192c/r92c_beacon.c optional rtwn dev/rtwn/rtl8192c/r92c_calib.c optional rtwn dev/rtwn/rtl8192c/r92c_chan.c optional rtwn dev/rtwn/rtl8192c/r92c_fw.c optional rtwn dev/rtwn/rtl8192c/r92c_init.c optional rtwn dev/rtwn/rtl8192c/r92c_llt.c optional rtwn dev/rtwn/rtl8192c/r92c_rf.c optional rtwn dev/rtwn/rtl8192c/r92c_rom.c optional rtwn dev/rtwn/rtl8192c/r92c_rx.c optional rtwn dev/rtwn/rtl8192c/r92c_tx.c optional rtwn dev/rtwn/rtl8192c/pci/r92ce_attach.c optional rtwn_pci pci dev/rtwn/rtl8192c/pci/r92ce_calib.c optional rtwn_pci pci dev/rtwn/rtl8192c/pci/r92ce_fw.c optional rtwn_pci pci dev/rtwn/rtl8192c/pci/r92ce_init.c optional rtwn_pci pci dev/rtwn/rtl8192c/pci/r92ce_led.c optional rtwn_pci pci dev/rtwn/rtl8192c/pci/r92ce_rx.c optional rtwn_pci pci dev/rtwn/rtl8192c/pci/r92ce_tx.c optional rtwn_pci pci dev/rtwn/rtl8192c/usb/r92cu_attach.c optional rtwn_usb dev/rtwn/rtl8192c/usb/r92cu_init.c optional rtwn_usb dev/rtwn/rtl8192c/usb/r92cu_led.c optional rtwn_usb dev/rtwn/rtl8192c/usb/r92cu_rx.c optional rtwn_usb dev/rtwn/rtl8192c/usb/r92cu_tx.c optional rtwn_usb # RTL8192E dev/rtwn/rtl8192e/r92e_chan.c optional rtwn dev/rtwn/rtl8192e/r92e_fw.c optional rtwn dev/rtwn/rtl8192e/r92e_init.c optional rtwn dev/rtwn/rtl8192e/r92e_led.c optional rtwn dev/rtwn/rtl8192e/r92e_rf.c optional rtwn dev/rtwn/rtl8192e/r92e_rom.c optional rtwn dev/rtwn/rtl8192e/r92e_rx.c optional rtwn dev/rtwn/rtl8192e/usb/r92eu_attach.c optional rtwn_usb dev/rtwn/rtl8192e/usb/r92eu_init.c optional rtwn_usb # RTL8812A dev/rtwn/rtl8812a/r12a_beacon.c optional rtwn dev/rtwn/rtl8812a/r12a_calib.c optional rtwn dev/rtwn/rtl8812a/r12a_caps.c optional rtwn dev/rtwn/rtl8812a/r12a_chan.c optional rtwn dev/rtwn/rtl8812a/r12a_fw.c optional rtwn dev/rtwn/rtl8812a/r12a_init.c optional rtwn dev/rtwn/rtl8812a/r12a_led.c optional rtwn dev/rtwn/rtl8812a/r12a_rf.c optional rtwn dev/rtwn/rtl8812a/r12a_rom.c optional rtwn dev/rtwn/rtl8812a/r12a_rx.c optional rtwn dev/rtwn/rtl8812a/r12a_tx.c optional rtwn dev/rtwn/rtl8812a/usb/r12au_attach.c optional rtwn_usb dev/rtwn/rtl8812a/usb/r12au_init.c optional rtwn_usb dev/rtwn/rtl8812a/usb/r12au_rx.c optional rtwn_usb dev/rtwn/rtl8812a/usb/r12au_tx.c optional rtwn_usb # RTL8821A dev/rtwn/rtl8821a/r21a_beacon.c optional rtwn dev/rtwn/rtl8821a/r21a_calib.c optional rtwn dev/rtwn/rtl8821a/r21a_chan.c optional rtwn dev/rtwn/rtl8821a/r21a_fw.c optional rtwn dev/rtwn/rtl8821a/r21a_init.c optional rtwn dev/rtwn/rtl8821a/r21a_led.c optional rtwn dev/rtwn/rtl8821a/r21a_rom.c optional rtwn dev/rtwn/rtl8821a/r21a_rx.c optional rtwn dev/rtwn/rtl8821a/usb/r21au_attach.c optional rtwn_usb dev/rtwn/rtl8821a/usb/r21au_dfs.c optional rtwn_usb dev/rtwn/rtl8821a/usb/r21au_init.c optional rtwn_usb rtwn-rtl8188eefw.c optional rtwn-rtl8188eefw | rtwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rtwn-rtl8188eefw.fw:rtwn-rtl8188eefw:111 -mrtwn-rtl8188eefw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rtwn-rtl8188eefw.c" rtwn-rtl8188eefw.fwo optional rtwn-rtl8188eefw | rtwnfw \ dependency "rtwn-rtl8188eefw.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rtwn-rtl8188eefw.fwo" rtwn-rtl8188eefw.fw optional rtwn-rtl8188eefw | rtwnfw \ dependency "$S/contrib/dev/rtwn/rtwn-rtl8188eefw.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rtwn-rtl8188eefw.fw" rtwn-rtl8188eufw.c optional rtwn-rtl8188eufw | rtwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rtwn-rtl8188eufw.fw:rtwn-rtl8188eufw:111 -mrtwn-rtl8188eufw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rtwn-rtl8188eufw.c" rtwn-rtl8188eufw.fwo optional rtwn-rtl8188eufw | rtwnfw \ dependency "rtwn-rtl8188eufw.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rtwn-rtl8188eufw.fwo" rtwn-rtl8188eufw.fw optional rtwn-rtl8188eufw | rtwnfw \ dependency "$S/contrib/dev/rtwn/rtwn-rtl8188eufw.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rtwn-rtl8188eufw.fw" rtwn-rtl8192cfwE.c optional rtwn-rtl8192cfwE | rtwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rtwn-rtl8192cfwE.fw:rtwn-rtl8192cfwE:111 -mrtwn-rtl8192cfwE -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rtwn-rtl8192cfwE.c" rtwn-rtl8192cfwE.fwo optional rtwn-rtl8192cfwE | rtwnfw \ dependency "rtwn-rtl8192cfwE.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rtwn-rtl8192cfwE.fwo" rtwn-rtl8192cfwE.fw optional rtwn-rtl8192cfwE | rtwnfw \ dependency "$S/contrib/dev/rtwn/rtwn-rtl8192cfwE.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rtwn-rtl8192cfwE.fw" rtwn-rtl8192cfwE_B.c optional rtwn-rtl8192cfwE_B | rtwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rtwn-rtl8192cfwE_B.fw:rtwn-rtl8192cfwE_B:111 -mrtwn-rtl8192cfwE_B -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rtwn-rtl8192cfwE_B.c" rtwn-rtl8192cfwE_B.fwo optional rtwn-rtl8192cfwE_B | rtwnfw \ dependency "rtwn-rtl8192cfwE_B.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rtwn-rtl8192cfwE_B.fwo" rtwn-rtl8192cfwE_B.fw optional rtwn-rtl8192cfwE_B | rtwnfw \ dependency "$S/contrib/dev/rtwn/rtwn-rtl8192cfwE_B.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rtwn-rtl8192cfwE_B.fw" rtwn-rtl8192cfwT.c optional rtwn-rtl8192cfwT | rtwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rtwn-rtl8192cfwT.fw:rtwn-rtl8192cfwT:111 -mrtwn-rtl8192cfwT -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rtwn-rtl8192cfwT.c" rtwn-rtl8192cfwT.fwo optional rtwn-rtl8192cfwT | rtwnfw \ dependency "rtwn-rtl8192cfwT.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rtwn-rtl8192cfwT.fwo" rtwn-rtl8192cfwT.fw optional rtwn-rtl8192cfwT | rtwnfw \ dependency "$S/contrib/dev/rtwn/rtwn-rtl8192cfwT.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rtwn-rtl8192cfwT.fw" rtwn-rtl8192cfwU.c optional rtwn-rtl8192cfwU | rtwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rtwn-rtl8192cfwU.fw:rtwn-rtl8192cfwU:111 -mrtwn-rtl8192cfwU -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rtwn-rtl8192cfwU.c" rtwn-rtl8192cfwU.fwo optional rtwn-rtl8192cfwU | rtwnfw \ dependency "rtwn-rtl8192cfwU.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rtwn-rtl8192cfwU.fwo" rtwn-rtl8192cfwU.fw optional rtwn-rtl8192cfwU | rtwnfw \ dependency "$S/contrib/dev/rtwn/rtwn-rtl8192cfwU.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rtwn-rtl8192cfwU.fw" rtwn-rtl8192eufw.c optional rtwn-rtl8192eufw | rtwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rtwn-rtl8192eufw.fw:rtwn-rtl8192eufw:111 -mrtwn-rtl8192eufw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rtwn-rtl8192eufw.c" rtwn-rtl8192eufw.fwo optional rtwn-rtl8192eufw | rtwnfw \ dependency "rtwn-rtl8192eufw.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rtwn-rtl8192eufw.fwo" rtwn-rtl8192eufw.fw optional rtwn-rtl8192eufw | rtwnfw \ dependency "$S/contrib/dev/rtwn/rtwn-rtl8192eufw.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rtwn-rtl8192eufw.fw" rtwn-rtl8812aufw.c optional rtwn-rtl8812aufw | rtwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rtwn-rtl8812aufw.fw:rtwn-rtl8812aufw:111 -mrtwn-rtl8812aufw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rtwn-rtl8812aufw.c" rtwn-rtl8812aufw.fwo optional rtwn-rtl8812aufw | rtwnfw \ dependency "rtwn-rtl8812aufw.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rtwn-rtl8812aufw.fwo" rtwn-rtl8812aufw.fw optional rtwn-rtl8812aufw | rtwnfw \ dependency "$S/contrib/dev/rtwn/rtwn-rtl8812aufw.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rtwn-rtl8812aufw.fw" rtwn-rtl8821aufw.c optional rtwn-rtl8821aufw | rtwnfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rtwn-rtl8821aufw.fw:rtwn-rtl8821aufw:111 -mrtwn-rtl8821aufw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rtwn-rtl8821aufw.c" rtwn-rtl8821aufw.fwo optional rtwn-rtl8821aufw | rtwnfw \ dependency "rtwn-rtl8821aufw.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rtwn-rtl8821aufw.fwo" rtwn-rtl8821aufw.fw optional rtwn-rtl8821aufw | rtwnfw \ dependency "$S/contrib/dev/rtwn/rtwn-rtl8821aufw.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rtwn-rtl8821aufw.fw" dev/safe/safe.c optional safe dev/scc/scc_if.m optional scc dev/scc/scc_bfe_ebus.c optional scc ebus dev/scc/scc_bfe_quicc.c optional scc quicc dev/scc/scc_bfe_sbus.c optional scc fhc | scc sbus dev/scc/scc_core.c optional scc dev/scc/scc_dev_quicc.c optional scc quicc dev/scc/scc_dev_sab82532.c optional scc dev/scc/scc_dev_z8530.c optional scc dev/sdhci/sdhci.c optional sdhci dev/sdhci/sdhci_fdt.c optional sdhci fdt dev/sdhci/sdhci_fdt_gpio.c optional sdhci fdt gpio dev/sdhci/sdhci_if.m optional sdhci dev/sdhci/sdhci_acpi.c optional sdhci acpi dev/sdhci/sdhci_pci.c optional sdhci pci dev/sdio/sdio_if.m optional mmccam dev/sdio/sdio_subr.c optional mmccam dev/sdio/sdiob.c optional mmccam dev/sge/if_sge.c optional sge pci dev/siis/siis.c optional siis pci dev/sis/if_sis.c optional sis pci dev/sk/if_sk.c optional sk pci dev/smbus/smb.c optional smb dev/smbus/smbconf.c optional smbus dev/smbus/smbus.c optional smbus dev/smbus/smbus_if.m optional smbus dev/smc/if_smc.c optional smc dev/smc/if_smc_fdt.c optional smc fdt dev/snp/snp.c optional snp dev/sound/clone.c optional sound dev/sound/unit.c optional sound dev/sound/isa/ad1816.c optional snd_ad1816 isa dev/sound/isa/ess.c optional snd_ess isa dev/sound/isa/gusc.c optional snd_gusc isa dev/sound/isa/mss.c optional snd_mss isa dev/sound/isa/sb16.c optional snd_sb16 isa dev/sound/isa/sb8.c optional snd_sb8 isa dev/sound/isa/sbc.c optional snd_sbc isa dev/sound/isa/sndbuf_dma.c optional sound isa dev/sound/pci/als4000.c optional snd_als4000 pci dev/sound/pci/atiixp.c optional snd_atiixp pci dev/sound/pci/cmi.c optional snd_cmi pci dev/sound/pci/cs4281.c optional snd_cs4281 pci dev/sound/pci/csa.c optional snd_csa pci dev/sound/pci/csapcm.c optional snd_csa pci dev/sound/pci/ds1.c optional snd_ds1 pci dev/sound/pci/emu10k1.c optional snd_emu10k1 pci dev/sound/pci/emu10kx.c optional snd_emu10kx pci dev/sound/pci/emu10kx-pcm.c optional snd_emu10kx pci dev/sound/pci/emu10kx-midi.c optional snd_emu10kx pci dev/sound/pci/envy24.c optional snd_envy24 pci dev/sound/pci/envy24ht.c optional snd_envy24ht pci dev/sound/pci/es137x.c optional snd_es137x pci dev/sound/pci/fm801.c optional snd_fm801 pci dev/sound/pci/ich.c optional snd_ich pci dev/sound/pci/maestro.c optional snd_maestro pci dev/sound/pci/maestro3.c optional snd_maestro3 pci dev/sound/pci/neomagic.c optional snd_neomagic pci dev/sound/pci/solo.c optional snd_solo pci dev/sound/pci/spicds.c optional snd_spicds pci dev/sound/pci/t4dwave.c optional snd_t4dwave pci dev/sound/pci/via8233.c optional snd_via8233 pci dev/sound/pci/via82c686.c optional snd_via82c686 pci dev/sound/pci/vibes.c optional snd_vibes pci dev/sound/pci/hda/hdaa.c optional snd_hda pci dev/sound/pci/hda/hdaa_patches.c optional snd_hda pci dev/sound/pci/hda/hdac.c optional snd_hda pci dev/sound/pci/hda/hdac_if.m optional snd_hda pci dev/sound/pci/hda/hdacc.c optional snd_hda pci dev/sound/pci/hdspe.c optional snd_hdspe pci dev/sound/pci/hdspe-pcm.c optional snd_hdspe pci dev/sound/pcm/ac97.c optional sound dev/sound/pcm/ac97_if.m optional sound dev/sound/pcm/ac97_patch.c optional sound dev/sound/pcm/buffer.c optional sound \ dependency "snd_fxdiv_gen.h" dev/sound/pcm/channel.c optional sound dev/sound/pcm/channel_if.m optional sound dev/sound/pcm/dsp.c optional sound dev/sound/pcm/feeder.c optional sound dev/sound/pcm/feeder_chain.c optional sound dev/sound/pcm/feeder_eq.c optional sound \ dependency "feeder_eq_gen.h" \ dependency "snd_fxdiv_gen.h" dev/sound/pcm/feeder_if.m optional sound dev/sound/pcm/feeder_format.c optional sound \ dependency "snd_fxdiv_gen.h" dev/sound/pcm/feeder_matrix.c optional sound \ dependency "snd_fxdiv_gen.h" dev/sound/pcm/feeder_mixer.c optional sound \ dependency "snd_fxdiv_gen.h" dev/sound/pcm/feeder_rate.c optional sound \ dependency "feeder_rate_gen.h" \ dependency "snd_fxdiv_gen.h" dev/sound/pcm/feeder_volume.c optional sound \ dependency "snd_fxdiv_gen.h" dev/sound/pcm/mixer.c optional sound dev/sound/pcm/mixer_if.m optional sound dev/sound/pcm/sndstat.c optional sound dev/sound/pcm/sound.c optional sound dev/sound/pcm/vchan.c optional sound dev/sound/usb/uaudio.c optional snd_uaudio usb dev/sound/usb/uaudio_pcm.c optional snd_uaudio usb dev/sound/midi/midi.c optional sound dev/sound/midi/mpu401.c optional sound dev/sound/midi/mpu_if.m optional sound dev/sound/midi/mpufoi_if.m optional sound dev/sound/midi/sequencer.c optional sound dev/sound/midi/synth_if.m optional sound dev/spibus/ofw_spibus.c optional fdt spibus dev/spibus/spibus.c optional spibus \ dependency "spibus_if.h" dev/spibus/spigen.c optional spigen dev/spibus/spibus_if.m optional spibus dev/ste/if_ste.c optional ste pci dev/stge/if_stge.c optional stge dev/sym/sym_hipd.c optional sym \ dependency "$S/dev/sym/sym_{conf,defs}.h" dev/syscons/blank/blank_saver.c optional blank_saver dev/syscons/daemon/daemon_saver.c optional daemon_saver dev/syscons/dragon/dragon_saver.c optional dragon_saver dev/syscons/fade/fade_saver.c optional fade_saver dev/syscons/fire/fire_saver.c optional fire_saver dev/syscons/green/green_saver.c optional green_saver dev/syscons/logo/logo.c optional logo_saver dev/syscons/logo/logo_saver.c optional logo_saver dev/syscons/rain/rain_saver.c optional rain_saver dev/syscons/schistory.c optional sc dev/syscons/scmouse.c optional sc dev/syscons/scterm.c optional sc dev/syscons/scterm-dumb.c optional sc !SC_NO_TERM_DUMB dev/syscons/scterm-sc.c optional sc !SC_NO_TERM_SC dev/syscons/scterm-teken.c optional sc !SC_NO_TERM_TEKEN dev/syscons/scvidctl.c optional sc dev/syscons/scvtb.c optional sc dev/syscons/snake/snake_saver.c optional snake_saver dev/syscons/star/star_saver.c optional star_saver dev/syscons/syscons.c optional sc dev/syscons/sysmouse.c optional sc dev/syscons/warp/warp_saver.c optional warp_saver dev/tcp_log/tcp_log_dev.c optional tcp_blackbox inet | tcp_blackbox inet6 dev/tdfx/tdfx_linux.c optional tdfx_linux tdfx compat_linux dev/tdfx/tdfx_pci.c optional tdfx pci dev/ti/if_ti.c optional ti pci dev/trm/trm.c optional trm dev/twa/tw_cl_init.c optional twa \ compile-with "${NORMAL_C} -I$S/dev/twa" dev/twa/tw_cl_intr.c optional twa \ compile-with "${NORMAL_C} -I$S/dev/twa" dev/twa/tw_cl_io.c optional twa \ compile-with "${NORMAL_C} -I$S/dev/twa" dev/twa/tw_cl_misc.c optional twa \ compile-with "${NORMAL_C} -I$S/dev/twa" dev/twa/tw_osl_cam.c optional twa \ compile-with "${NORMAL_C} -I$S/dev/twa" dev/twa/tw_osl_freebsd.c optional twa \ compile-with "${NORMAL_C} -I$S/dev/twa" dev/twe/twe.c optional twe dev/twe/twe_freebsd.c optional twe dev/tws/tws.c optional tws dev/tws/tws_cam.c optional tws dev/tws/tws_hdm.c optional tws dev/tws/tws_services.c optional tws dev/tws/tws_user.c optional tws dev/uart/uart_bus_acpi.c optional uart acpi dev/uart/uart_bus_ebus.c optional uart ebus dev/uart/uart_bus_fdt.c optional uart fdt dev/uart/uart_bus_isa.c optional uart isa dev/uart/uart_bus_pccard.c optional uart pccard dev/uart/uart_bus_pci.c optional uart pci dev/uart/uart_bus_puc.c optional uart puc dev/uart/uart_bus_scc.c optional uart scc dev/uart/uart_core.c optional uart dev/uart/uart_cpu_acpi.c optional uart acpi dev/uart/uart_dbg.c optional uart gdb dev/uart/uart_dev_msm.c optional uart uart_msm fdt dev/uart/uart_dev_mvebu.c optional uart uart_mvebu dev/uart/uart_dev_ns8250.c optional uart uart_ns8250 | uart uart_snps dev/uart/uart_dev_pl011.c optional uart pl011 dev/uart/uart_dev_quicc.c optional uart quicc dev/uart/uart_dev_sab82532.c optional uart uart_sab82532 dev/uart/uart_dev_sab82532.c optional uart scc dev/uart/uart_dev_snps.c optional uart uart_snps fdt dev/uart/uart_dev_z8530.c optional uart uart_z8530 dev/uart/uart_dev_z8530.c optional uart scc dev/uart/uart_if.m optional uart dev/uart/uart_subr.c optional uart dev/uart/uart_tty.c optional uart dev/ubsec/ubsec.c optional ubsec # # USB controller drivers # dev/usb/controller/musb_otg.c optional musb dev/usb/controller/dwc_otg.c optional dwcotg dev/usb/controller/dwc_otg_fdt.c optional dwcotg fdt dev/usb/controller/ehci.c optional ehci dev/usb/controller/ehci_msm.c optional ehci_msm fdt dev/usb/controller/ehci_pci.c optional ehci pci dev/usb/controller/ohci.c optional ohci dev/usb/controller/ohci_pci.c optional ohci pci dev/usb/controller/uhci.c optional uhci dev/usb/controller/uhci_pci.c optional uhci pci dev/usb/controller/xhci.c optional xhci dev/usb/controller/xhci_pci.c optional xhci pci dev/usb/controller/saf1761_otg.c optional saf1761otg dev/usb/controller/saf1761_otg_fdt.c optional saf1761otg fdt dev/usb/controller/uss820dci.c optional uss820dci dev/usb/controller/usb_controller.c optional usb # # USB storage drivers # dev/usb/storage/cfumass.c optional cfumass ctl dev/usb/storage/umass.c optional umass dev/usb/storage/urio.c optional urio dev/usb/storage/ustorage_fs.c optional usfs # # USB core # dev/usb/usb_busdma.c optional usb dev/usb/usb_core.c optional usb dev/usb/usb_debug.c optional usb dev/usb/usb_dev.c optional usb dev/usb/usb_device.c optional usb dev/usb/usb_dynamic.c optional usb dev/usb/usb_error.c optional usb dev/usb/usb_fdt_support.c optional usb fdt dev/usb/usb_generic.c optional usb dev/usb/usb_handle_request.c optional usb dev/usb/usb_hid.c optional usb dev/usb/usb_hub.c optional usb dev/usb/usb_hub_acpi.c optional uacpi acpi dev/usb/usb_if.m optional usb dev/usb/usb_lookup.c optional usb dev/usb/usb_mbuf.c optional usb dev/usb/usb_msctest.c optional usb dev/usb/usb_parse.c optional usb dev/usb/usb_pf.c optional usb dev/usb/usb_process.c optional usb dev/usb/usb_request.c optional usb dev/usb/usb_transfer.c optional usb dev/usb/usb_util.c optional usb # # USB network drivers # dev/usb/net/if_aue.c optional aue dev/usb/net/if_axe.c optional axe dev/usb/net/if_axge.c optional axge dev/usb/net/if_cdce.c optional cdce dev/usb/net/if_cdceem.c optional cdceem dev/usb/net/if_cue.c optional cue dev/usb/net/if_ipheth.c optional ipheth dev/usb/net/if_kue.c optional kue dev/usb/net/if_mos.c optional mos dev/usb/net/if_muge.c optional muge dev/usb/net/if_rue.c optional rue dev/usb/net/if_smsc.c optional smsc dev/usb/net/if_udav.c optional udav dev/usb/net/if_ure.c optional ure dev/usb/net/if_usie.c optional usie dev/usb/net/if_urndis.c optional urndis dev/usb/net/ruephy.c optional rue dev/usb/net/usb_ethernet.c optional uether | aue | axe | axge | cdce | \ cdceem | cue | ipheth | kue | mos | \ rue | smsc | udav | ure | urndis | muge dev/usb/net/uhso.c optional uhso # # USB WLAN drivers # dev/usb/wlan/if_rsu.c optional rsu rsu-rtl8712fw.c optional rsu-rtl8712fw | rsufw \ compile-with "${AWK} -f $S/tools/fw_stub.awk rsu-rtl8712fw.fw:rsu-rtl8712fw:120 -mrsu-rtl8712fw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "rsu-rtl8712fw.c" rsu-rtl8712fw.fwo optional rsu-rtl8712fw | rsufw \ dependency "rsu-rtl8712fw.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "rsu-rtl8712fw.fwo" rsu-rtl8712fw.fw optional rsu-rtl8712.fw | rsufw \ dependency "$S/contrib/dev/rsu/rsu-rtl8712fw.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "rsu-rtl8712fw.fw" dev/usb/wlan/if_rum.c optional rum dev/usb/wlan/if_run.c optional run runfw.c optional runfw \ compile-with "${AWK} -f $S/tools/fw_stub.awk run.fw:runfw -mrunfw -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "runfw.c" runfw.fwo optional runfw \ dependency "run.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "runfw.fwo" run.fw optional runfw \ dependency "$S/contrib/dev/run/rt2870.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "run.fw" dev/usb/wlan/if_uath.c optional uath dev/usb/wlan/if_upgt.c optional upgt dev/usb/wlan/if_ural.c optional ural dev/usb/wlan/if_urtw.c optional urtw dev/usb/wlan/if_zyd.c optional zyd # # USB serial and parallel port drivers # dev/usb/serial/u3g.c optional u3g dev/usb/serial/uark.c optional uark dev/usb/serial/ubsa.c optional ubsa dev/usb/serial/ubser.c optional ubser dev/usb/serial/uchcom.c optional uchcom dev/usb/serial/ucycom.c optional ucycom dev/usb/serial/ufoma.c optional ufoma dev/usb/serial/uftdi.c optional uftdi dev/usb/serial/ugensa.c optional ugensa dev/usb/serial/uipaq.c optional uipaq dev/usb/serial/ulpt.c optional ulpt dev/usb/serial/umcs.c optional umcs dev/usb/serial/umct.c optional umct dev/usb/serial/umodem.c optional umodem dev/usb/serial/umoscom.c optional umoscom dev/usb/serial/uplcom.c optional uplcom dev/usb/serial/uslcom.c optional uslcom dev/usb/serial/uvisor.c optional uvisor dev/usb/serial/uvscom.c optional uvscom dev/usb/serial/usb_serial.c optional ucom | u3g | uark | ubsa | ubser | \ uchcom | ucycom | ufoma | uftdi | \ ugensa | uipaq | umcs | umct | \ umodem | umoscom | uplcom | usie | \ uslcom | uvisor | uvscom # # USB misc drivers # dev/usb/misc/ufm.c optional ufm dev/usb/misc/udbp.c optional udbp dev/usb/misc/ugold.c optional ugold dev/usb/misc/uled.c optional uled # # USB input drivers # dev/usb/input/atp.c optional atp dev/usb/input/uep.c optional uep dev/usb/input/uhid.c optional uhid dev/usb/input/uhid_snes.c optional uhid_snes dev/usb/input/ukbd.c optional ukbd dev/usb/input/ums.c optional ums dev/usb/input/wmt.c optional wmt dev/usb/input/wsp.c optional wsp # # USB quirks # dev/usb/quirk/usb_quirk.c optional usb # # USB templates # dev/usb/template/usb_template.c optional usb_template dev/usb/template/usb_template_audio.c optional usb_template dev/usb/template/usb_template_cdce.c optional usb_template dev/usb/template/usb_template_kbd.c optional usb_template dev/usb/template/usb_template_modem.c optional usb_template dev/usb/template/usb_template_mouse.c optional usb_template dev/usb/template/usb_template_msc.c optional usb_template dev/usb/template/usb_template_mtp.c optional usb_template dev/usb/template/usb_template_phone.c optional usb_template dev/usb/template/usb_template_serialnet.c optional usb_template dev/usb/template/usb_template_midi.c optional usb_template dev/usb/template/usb_template_multi.c optional usb_template dev/usb/template/usb_template_cdceem.c optional usb_template # # USB video drivers # dev/usb/video/udl.c optional udl # # USB END # dev/videomode/videomode.c optional videomode dev/videomode/edid.c optional videomode dev/videomode/pickmode.c optional videomode dev/videomode/vesagtf.c optional videomode dev/veriexec/verified_exec.c optional veriexec mac_veriexec dev/vge/if_vge.c optional vge dev/viapm/viapm.c optional viapm pci dev/virtio/virtio.c optional virtio dev/virtio/virtqueue.c optional virtio dev/virtio/virtio_bus_if.m optional virtio dev/virtio/virtio_if.m optional virtio dev/virtio/pci/virtio_pci.c optional virtio_pci dev/virtio/mmio/virtio_mmio.c optional virtio_mmio dev/virtio/mmio/virtio_mmio_acpi.c optional virtio_mmio acpi dev/virtio/mmio/virtio_mmio_fdt.c optional virtio_mmio fdt dev/virtio/mmio/virtio_mmio_if.m optional virtio_mmio dev/virtio/network/if_vtnet.c optional vtnet dev/virtio/block/virtio_blk.c optional virtio_blk dev/virtio/balloon/virtio_balloon.c optional virtio_balloon dev/virtio/scsi/virtio_scsi.c optional virtio_scsi dev/virtio/random/virtio_random.c optional virtio_random dev/virtio/console/virtio_console.c optional virtio_console dev/vkbd/vkbd.c optional vkbd dev/vr/if_vr.c optional vr pci dev/vt/colors/vt_termcolors.c optional vt dev/vt/font/vt_font_default.c optional vt dev/vt/font/vt_mouse_cursor.c optional vt dev/vt/hw/efifb/efifb.c optional vt_efifb dev/vt/hw/fb/vt_fb.c optional vt dev/vt/hw/vga/vt_vga.c optional vt vt_vga dev/vt/logo/logo_freebsd.c optional vt splash dev/vt/logo/logo_beastie.c optional vt splash dev/vt/vt_buf.c optional vt dev/vt/vt_consolectl.c optional vt dev/vt/vt_core.c optional vt dev/vt/vt_cpulogos.c optional vt splash dev/vt/vt_font.c optional vt dev/vt/vt_sysmouse.c optional vt dev/vte/if_vte.c optional vte pci dev/watchdog/watchdog.c standard dev/wi/if_wi.c optional wi dev/wi/if_wi_pccard.c optional wi pccard dev/wi/if_wi_pci.c optional wi pci dev/wpi/if_wpi.c optional wpi pci wpifw.c optional wpifw \ compile-with "${AWK} -f $S/tools/fw_stub.awk wpi.fw:wpifw:153229 -mwpi -c${.TARGET}" \ no-implicit-rule before-depend local \ clean "wpifw.c" wpifw.fwo optional wpifw \ dependency "wpi.fw" \ compile-with "${NORMAL_FWO}" \ no-implicit-rule \ clean "wpifw.fwo" wpi.fw optional wpifw \ dependency "$S/contrib/dev/wpi/iwlwifi-3945-15.32.2.9.fw.uu" \ compile-with "${NORMAL_FW}" \ no-obj no-implicit-rule \ clean "wpi.fw" dev/xdma/controller/pl330.c optional xdma pl330 dev/xdma/xdma.c optional xdma dev/xdma/xdma_bank.c optional xdma dev/xdma/xdma_bio.c optional xdma dev/xdma/xdma_fdt_test.c optional xdma xdma_test fdt dev/xdma/xdma_if.m optional xdma dev/xdma/xdma_iommu.c optional xdma dev/xdma/xdma_mbuf.c optional xdma dev/xdma/xdma_queue.c optional xdma dev/xdma/xdma_sg.c optional xdma dev/xdma/xdma_sglist.c optional xdma dev/xen/balloon/balloon.c optional xenhvm dev/xen/blkfront/blkfront.c optional xenhvm dev/xen/blkback/blkback.c optional xenhvm dev/xen/console/xen_console.c optional xenhvm dev/xen/control/control.c optional xenhvm dev/xen/grant_table/grant_table.c optional xenhvm dev/xen/netback/netback.c optional xenhvm dev/xen/netfront/netfront.c optional xenhvm dev/xen/xenpci/xenpci.c optional xenpci dev/xen/timer/timer.c optional xenhvm dev/xen/pvcpu/pvcpu.c optional xenhvm dev/xen/xenstore/xenstore.c optional xenhvm dev/xen/xenstore/xenstore_dev.c optional xenhvm dev/xen/xenstore/xenstored_dev.c optional xenhvm dev/xen/evtchn/evtchn_dev.c optional xenhvm dev/xen/privcmd/privcmd.c optional xenhvm dev/xen/gntdev/gntdev.c optional xenhvm dev/xen/debug/debug.c optional xenhvm dev/xl/if_xl.c optional xl pci dev/xl/xlphy.c optional xl pci fs/autofs/autofs.c optional autofs fs/autofs/autofs_vfsops.c optional autofs fs/autofs/autofs_vnops.c optional autofs fs/deadfs/dead_vnops.c standard fs/devfs/devfs_devs.c standard fs/devfs/devfs_dir.c standard fs/devfs/devfs_rule.c standard fs/devfs/devfs_vfsops.c standard fs/devfs/devfs_vnops.c standard fs/fdescfs/fdesc_vfsops.c optional fdescfs fs/fdescfs/fdesc_vnops.c optional fdescfs fs/fifofs/fifo_vnops.c standard fs/cuse/cuse.c optional cuse fs/fuse/fuse_device.c optional fusefs fs/fuse/fuse_file.c optional fusefs fs/fuse/fuse_internal.c optional fusefs fs/fuse/fuse_io.c optional fusefs fs/fuse/fuse_ipc.c optional fusefs fs/fuse/fuse_main.c optional fusefs fs/fuse/fuse_node.c optional fusefs fs/fuse/fuse_vfsops.c optional fusefs fs/fuse/fuse_vnops.c optional fusefs fs/msdosfs/msdosfs_conv.c optional msdosfs fs/msdosfs/msdosfs_denode.c optional msdosfs fs/msdosfs/msdosfs_fat.c optional msdosfs fs/msdosfs/msdosfs_iconv.c optional msdosfs_iconv fs/msdosfs/msdosfs_lookup.c optional msdosfs fs/msdosfs/msdosfs_vfsops.c optional msdosfs fs/msdosfs/msdosfs_vnops.c optional msdosfs fs/nfs/nfs_commonkrpc.c optional nfscl | nfsd fs/nfs/nfs_commonsubs.c optional nfscl | nfsd fs/nfs/nfs_commonport.c optional nfscl | nfsd fs/nfs/nfs_commonacl.c optional nfscl | nfsd fs/nfsclient/nfs_clcomsubs.c optional nfscl fs/nfsclient/nfs_clsubs.c optional nfscl fs/nfsclient/nfs_clstate.c optional nfscl fs/nfsclient/nfs_clkrpc.c optional nfscl fs/nfsclient/nfs_clrpcops.c optional nfscl fs/nfsclient/nfs_clvnops.c optional nfscl fs/nfsclient/nfs_clnode.c optional nfscl fs/nfsclient/nfs_clvfsops.c optional nfscl fs/nfsclient/nfs_clport.c optional nfscl fs/nfsclient/nfs_clbio.c optional nfscl fs/nfsclient/nfs_clnfsiod.c optional nfscl fs/nfsserver/nfs_fha_new.c optional nfsd inet fs/nfsserver/nfs_nfsdsocket.c optional nfsd inet fs/nfsserver/nfs_nfsdsubs.c optional nfsd inet fs/nfsserver/nfs_nfsdstate.c optional nfsd inet fs/nfsserver/nfs_nfsdkrpc.c optional nfsd inet fs/nfsserver/nfs_nfsdserv.c optional nfsd inet fs/nfsserver/nfs_nfsdport.c optional nfsd inet fs/nfsserver/nfs_nfsdcache.c optional nfsd inet fs/nullfs/null_subr.c optional nullfs fs/nullfs/null_vfsops.c optional nullfs fs/nullfs/null_vnops.c optional nullfs fs/procfs/procfs.c optional procfs fs/procfs/procfs_dbregs.c optional procfs fs/procfs/procfs_fpregs.c optional procfs fs/procfs/procfs_ioctl.c optional procfs fs/procfs/procfs_map.c optional procfs fs/procfs/procfs_mem.c optional procfs fs/procfs/procfs_note.c optional procfs fs/procfs/procfs_osrel.c optional procfs fs/procfs/procfs_regs.c optional procfs fs/procfs/procfs_rlimit.c optional procfs fs/procfs/procfs_status.c optional procfs fs/procfs/procfs_type.c optional procfs fs/pseudofs/pseudofs.c optional pseudofs fs/pseudofs/pseudofs_fileno.c optional pseudofs fs/pseudofs/pseudofs_vncache.c optional pseudofs fs/pseudofs/pseudofs_vnops.c optional pseudofs fs/smbfs/smbfs_io.c optional smbfs fs/smbfs/smbfs_node.c optional smbfs fs/smbfs/smbfs_smb.c optional smbfs fs/smbfs/smbfs_subr.c optional smbfs fs/smbfs/smbfs_vfsops.c optional smbfs fs/smbfs/smbfs_vnops.c optional smbfs fs/udf/osta.c optional udf fs/udf/udf_iconv.c optional udf_iconv fs/udf/udf_vfsops.c optional udf fs/udf/udf_vnops.c optional udf fs/unionfs/union_subr.c optional unionfs fs/unionfs/union_vfsops.c optional unionfs fs/unionfs/union_vnops.c optional unionfs fs/tmpfs/tmpfs_vnops.c optional tmpfs fs/tmpfs/tmpfs_fifoops.c optional tmpfs fs/tmpfs/tmpfs_vfsops.c optional tmpfs fs/tmpfs/tmpfs_subr.c optional tmpfs gdb/gdb_cons.c optional gdb gdb/gdb_main.c optional gdb gdb/gdb_packet.c optional gdb geom/bde/g_bde.c optional geom_bde geom/bde/g_bde_crypt.c optional geom_bde geom/bde/g_bde_lock.c optional geom_bde geom/bde/g_bde_work.c optional geom_bde geom/cache/g_cache.c optional geom_cache geom/concat/g_concat.c optional geom_concat geom/eli/g_eli.c optional geom_eli geom/eli/g_eli_crypto.c optional geom_eli geom/eli/g_eli_ctl.c optional geom_eli geom/eli/g_eli_hmac.c optional geom_eli geom/eli/g_eli_integrity.c optional geom_eli geom/eli/g_eli_key.c optional geom_eli geom/eli/g_eli_key_cache.c optional geom_eli geom/eli/g_eli_privacy.c optional geom_eli geom/eli/pkcs5v2.c optional geom_eli geom/gate/g_gate.c optional geom_gate geom/geom_bsd_enc.c optional geom_part_bsd geom/geom_ccd.c optional ccd | geom_ccd geom/geom_ctl.c standard geom/geom_dev.c standard geom/geom_disk.c standard geom/geom_dump.c standard geom/geom_event.c standard geom/geom_flashmap.c optional fdt cfi | fdt mx25l | mmcsd | fdt n25q | fdt at45d geom/geom_io.c standard geom/geom_kern.c standard geom/geom_map.c optional geom_map geom/geom_redboot.c optional geom_redboot geom/geom_slice.c standard geom/geom_subr.c standard geom/geom_vfs.c standard geom/journal/g_journal.c optional geom_journal geom/journal/g_journal_ufs.c optional geom_journal geom/label/g_label.c optional geom_label | geom_label_gpt geom/label/g_label_ext2fs.c optional geom_label geom/label/g_label_flashmap.c optional geom_label geom/label/g_label_iso9660.c optional geom_label geom/label/g_label_msdosfs.c optional geom_label geom/label/g_label_ntfs.c optional geom_label geom/label/g_label_reiserfs.c optional geom_label geom/label/g_label_ufs.c optional geom_label geom/label/g_label_gpt.c optional geom_label | geom_label_gpt geom/label/g_label_disk_ident.c optional geom_label geom/linux_lvm/g_linux_lvm.c optional geom_linux_lvm geom/mirror/g_mirror.c optional geom_mirror geom/mirror/g_mirror_ctl.c optional geom_mirror geom/mountver/g_mountver.c optional geom_mountver geom/multipath/g_multipath.c optional geom_multipath geom/nop/g_nop.c optional geom_nop geom/part/g_part.c standard geom/part/g_part_if.m standard geom/part/g_part_apm.c optional geom_part_apm geom/part/g_part_bsd.c optional geom_part_bsd geom/part/g_part_bsd64.c optional geom_part_bsd64 geom/part/g_part_ebr.c optional geom_part_ebr geom/part/g_part_gpt.c optional geom_part_gpt geom/part/g_part_ldm.c optional geom_part_ldm geom/part/g_part_mbr.c optional geom_part_mbr geom/part/g_part_vtoc8.c optional geom_part_vtoc8 geom/raid/g_raid.c optional geom_raid geom/raid/g_raid_ctl.c optional geom_raid geom/raid/g_raid_md_if.m optional geom_raid geom/raid/g_raid_tr_if.m optional geom_raid geom/raid/md_ddf.c optional geom_raid geom/raid/md_intel.c optional geom_raid geom/raid/md_jmicron.c optional geom_raid geom/raid/md_nvidia.c optional geom_raid geom/raid/md_promise.c optional geom_raid geom/raid/md_sii.c optional geom_raid geom/raid/tr_concat.c optional geom_raid geom/raid/tr_raid0.c optional geom_raid geom/raid/tr_raid1.c optional geom_raid geom/raid/tr_raid1e.c optional geom_raid geom/raid/tr_raid5.c optional geom_raid geom/raid3/g_raid3.c optional geom_raid3 geom/raid3/g_raid3_ctl.c optional geom_raid3 geom/shsec/g_shsec.c optional geom_shsec geom/stripe/g_stripe.c optional geom_stripe geom/uzip/g_uzip.c optional geom_uzip geom/uzip/g_uzip_lzma.c optional geom_uzip geom/uzip/g_uzip_wrkthr.c optional geom_uzip geom/uzip/g_uzip_zlib.c optional geom_uzip geom/uzip/g_uzip_zstd.c optional geom_uzip zstdio \ compile-with "${NORMAL_C} -I$S/contrib/zstd/lib/freebsd" geom/vinum/geom_vinum.c optional geom_vinum geom/vinum/geom_vinum_create.c optional geom_vinum geom/vinum/geom_vinum_drive.c optional geom_vinum geom/vinum/geom_vinum_plex.c optional geom_vinum geom/vinum/geom_vinum_volume.c optional geom_vinum geom/vinum/geom_vinum_subr.c optional geom_vinum geom/vinum/geom_vinum_raid5.c optional geom_vinum geom/vinum/geom_vinum_share.c optional geom_vinum geom/vinum/geom_vinum_list.c optional geom_vinum geom/vinum/geom_vinum_rm.c optional geom_vinum geom/vinum/geom_vinum_init.c optional geom_vinum geom/vinum/geom_vinum_state.c optional geom_vinum geom/vinum/geom_vinum_rename.c optional geom_vinum geom/vinum/geom_vinum_move.c optional geom_vinum geom/vinum/geom_vinum_events.c optional geom_vinum geom/virstor/binstream.c optional geom_virstor geom/virstor/g_virstor.c optional geom_virstor geom/virstor/g_virstor_md.c optional geom_virstor geom/zero/g_zero.c optional geom_zero fs/ext2fs/ext2_acl.c optional ext2fs fs/ext2fs/ext2_alloc.c optional ext2fs fs/ext2fs/ext2_balloc.c optional ext2fs fs/ext2fs/ext2_bmap.c optional ext2fs fs/ext2fs/ext2_csum.c optional ext2fs fs/ext2fs/ext2_extattr.c optional ext2fs fs/ext2fs/ext2_extents.c optional ext2fs fs/ext2fs/ext2_inode.c optional ext2fs fs/ext2fs/ext2_inode_cnv.c optional ext2fs fs/ext2fs/ext2_hash.c optional ext2fs fs/ext2fs/ext2_htree.c optional ext2fs fs/ext2fs/ext2_lookup.c optional ext2fs fs/ext2fs/ext2_subr.c optional ext2fs fs/ext2fs/ext2_vfsops.c optional ext2fs fs/ext2fs/ext2_vnops.c optional ext2fs # isa/isa_if.m standard isa/isa_common.c optional isa isa/isahint.c optional isa isa/pnp.c optional isa isapnp isa/pnpparse.c optional isa isapnp fs/cd9660/cd9660_bmap.c optional cd9660 fs/cd9660/cd9660_lookup.c optional cd9660 fs/cd9660/cd9660_node.c optional cd9660 fs/cd9660/cd9660_rrip.c optional cd9660 fs/cd9660/cd9660_util.c optional cd9660 fs/cd9660/cd9660_vfsops.c optional cd9660 fs/cd9660/cd9660_vnops.c optional cd9660 fs/cd9660/cd9660_iconv.c optional cd9660_iconv gnu/gcov/gcc_4_7.c optional gcov \ warning "kernel contains GPL licensed gcov support" gnu/gcov/gcov_fs.c optional gcov lindebugfs \ compile-with "${LINUXKPI_C}" gnu/gcov/gcov_subr.c optional gcov kern/bus_if.m standard kern/clock_if.m standard kern/cpufreq_if.m standard kern/device_if.m standard kern/imgact_binmisc.c optional imagact_binmisc kern/imgact_elf.c standard kern/imgact_elf32.c optional compat_freebsd32 kern/imgact_shell.c standard kern/init_main.c standard kern/init_sysent.c standard kern/ksched.c optional _kposix_priority_scheduling kern/kern_acct.c standard kern/kern_alq.c optional alq kern/kern_clock.c standard kern/kern_condvar.c standard kern/kern_conf.c standard kern/kern_cons.c standard kern/kern_cpu.c standard kern/kern_cpuset.c standard kern/kern_context.c standard kern/kern_descrip.c standard kern/kern_dtrace.c optional kdtrace_hooks kern/kern_dump.c standard kern/kern_environment.c standard kern/kern_et.c standard kern/kern_event.c standard kern/kern_exec.c standard kern/kern_exit.c standard kern/kern_fail.c standard kern/kern_ffclock.c standard kern/kern_fork.c standard kern/kern_hhook.c standard kern/kern_idle.c standard kern/kern_intr.c standard kern/kern_jail.c standard kern/kern_kcov.c optional kcov \ compile-with "${NORMAL_C:N-fsanitize*}" kern/kern_khelp.c standard kern/kern_kthread.c standard kern/kern_ktr.c optional ktr kern/kern_ktrace.c standard kern/kern_linker.c standard kern/kern_lock.c standard kern/kern_lockf.c standard kern/kern_lockstat.c optional kdtrace_hooks kern/kern_loginclass.c standard kern/kern_malloc.c standard kern/kern_mbuf.c standard kern/kern_mib.c standard kern/kern_module.c standard kern/kern_mtxpool.c standard kern/kern_mutex.c standard kern/kern_ntptime.c standard kern/kern_osd.c standard kern/kern_physio.c standard kern/kern_pmc.c standard kern/kern_poll.c optional device_polling kern/kern_priv.c standard kern/kern_proc.c standard kern/kern_procctl.c standard kern/kern_prot.c standard kern/kern_racct.c standard kern/kern_rangelock.c standard kern/kern_rctl.c standard kern/kern_resource.c standard kern/kern_rmlock.c standard kern/kern_rwlock.c standard kern/kern_sdt.c optional kdtrace_hooks kern/kern_sema.c standard kern/kern_sendfile.c standard kern/kern_sharedpage.c standard kern/kern_shutdown.c standard kern/kern_sig.c standard kern/kern_switch.c standard kern/kern_sx.c standard kern/kern_synch.c standard kern/kern_syscalls.c standard kern/kern_sysctl.c standard kern/kern_tc.c standard kern/kern_thr.c standard kern/kern_thread.c standard kern/kern_time.c standard kern/kern_timeout.c standard kern/kern_tslog.c optional tslog kern/kern_ubsan.c optional kubsan kern/kern_umtx.c standard kern/kern_uuid.c standard kern/kern_xxx.c standard kern/link_elf.c standard kern/linker_if.m standard kern/md4c.c optional netsmb kern/md5c.c standard kern/p1003_1b.c standard kern/posix4_mib.c standard kern/sched_4bsd.c optional sched_4bsd kern/sched_ule.c optional sched_ule kern/serdev_if.m standard kern/stack_protector.c standard \ compile-with "${NORMAL_C:N-fstack-protector*}" kern/subr_acl_nfs4.c optional ufs_acl | zfs kern/subr_acl_posix1e.c optional ufs_acl kern/subr_autoconf.c standard kern/subr_blist.c standard kern/subr_boot.c standard kern/subr_bus.c standard kern/subr_bus_dma.c standard kern/subr_bufring.c standard kern/subr_capability.c standard kern/subr_clock.c standard kern/subr_compressor.c standard \ compile-with "${NORMAL_C} -I$S/contrib/zstd/lib/freebsd" kern/subr_coverage.c optional coverage \ compile-with "${NORMAL_C:N-fsanitize*}" kern/subr_counter.c standard kern/subr_devstat.c standard kern/subr_disk.c standard kern/subr_early.c standard kern/subr_epoch.c standard kern/subr_eventhandler.c standard kern/subr_fattime.c standard kern/subr_firmware.c optional firmware +kern/subr_filter.c standard kern/subr_gtaskqueue.c standard kern/subr_hash.c standard kern/subr_hints.c standard kern/subr_kdb.c standard kern/subr_kobj.c standard kern/subr_lock.c standard kern/subr_log.c standard kern/subr_mchain.c optional libmchain kern/subr_module.c standard kern/subr_msgbuf.c standard kern/subr_param.c standard kern/subr_pcpu.c standard kern/subr_pctrie.c standard kern/subr_pidctrl.c standard kern/subr_power.c standard kern/subr_prf.c standard kern/subr_prof.c standard kern/subr_rangeset.c standard kern/subr_rman.c standard kern/subr_rtc.c standard kern/subr_sbuf.c standard kern/subr_scanf.c standard kern/subr_sglist.c standard kern/subr_sleepqueue.c standard kern/subr_smp.c standard kern/subr_stack.c optional ddb | stack | ktr kern/subr_taskqueue.c standard kern/subr_terminal.c optional vt kern/subr_trap.c standard kern/subr_turnstile.c standard kern/subr_uio.c standard kern/subr_unit.c standard kern/subr_vmem.c standard kern/subr_witness.c optional witness kern/sys_capability.c standard kern/sys_generic.c standard kern/sys_getrandom.c standard kern/sys_pipe.c standard kern/sys_procdesc.c standard kern/sys_process.c standard kern/sys_socket.c standard kern/syscalls.c standard kern/sysv_ipc.c standard kern/sysv_msg.c optional sysvmsg kern/sysv_sem.c optional sysvsem kern/sysv_shm.c optional sysvshm kern/tty.c standard kern/tty_compat.c optional compat_43tty kern/tty_info.c standard kern/tty_inq.c standard kern/tty_outq.c standard kern/tty_pts.c standard kern/tty_tty.c standard kern/tty_ttydisc.c standard kern/uipc_accf.c standard kern/uipc_debug.c optional ddb kern/uipc_domain.c standard kern/uipc_ktls.c optional kern_tls kern/uipc_mbuf.c standard kern/uipc_mbuf2.c standard kern/uipc_mbufhash.c standard kern/uipc_mqueue.c optional p1003_1b_mqueue kern/uipc_sem.c optional p1003_1b_semaphores kern/uipc_shm.c standard kern/uipc_sockbuf.c standard kern/uipc_socket.c standard kern/uipc_syscalls.c standard kern/uipc_usrreq.c standard kern/vfs_acl.c standard kern/vfs_aio.c standard kern/vfs_bio.c standard kern/vfs_cache.c standard kern/vfs_cluster.c standard kern/vfs_default.c standard kern/vfs_export.c standard kern/vfs_extattr.c standard kern/vfs_hash.c standard kern/vfs_init.c standard kern/vfs_lookup.c standard kern/vfs_mount.c standard kern/vfs_mountroot.c standard kern/vfs_subr.c standard kern/vfs_syscalls.c standard kern/vfs_vnops.c standard # # Kernel GSS-API # gssd.h optional kgssapi \ dependency "$S/kgssapi/gssd.x" \ compile-with "RPCGEN_CPP='${CPP}' rpcgen -hM $S/kgssapi/gssd.x | grep -v pthread.h > gssd.h" \ no-obj no-implicit-rule before-depend local \ clean "gssd.h" gssd_xdr.c optional kgssapi \ dependency "$S/kgssapi/gssd.x gssd.h" \ compile-with "RPCGEN_CPP='${CPP}' rpcgen -c $S/kgssapi/gssd.x -o gssd_xdr.c" \ no-implicit-rule before-depend local \ clean "gssd_xdr.c" gssd_clnt.c optional kgssapi \ dependency "$S/kgssapi/gssd.x gssd.h" \ compile-with "RPCGEN_CPP='${CPP}' rpcgen -lM $S/kgssapi/gssd.x | grep -v string.h > gssd_clnt.c" \ no-implicit-rule before-depend local \ clean "gssd_clnt.c" kgssapi/gss_accept_sec_context.c optional kgssapi kgssapi/gss_add_oid_set_member.c optional kgssapi kgssapi/gss_acquire_cred.c optional kgssapi kgssapi/gss_canonicalize_name.c optional kgssapi kgssapi/gss_create_empty_oid_set.c optional kgssapi kgssapi/gss_delete_sec_context.c optional kgssapi kgssapi/gss_display_status.c optional kgssapi kgssapi/gss_export_name.c optional kgssapi kgssapi/gss_get_mic.c optional kgssapi kgssapi/gss_init_sec_context.c optional kgssapi kgssapi/gss_impl.c optional kgssapi kgssapi/gss_import_name.c optional kgssapi kgssapi/gss_names.c optional kgssapi kgssapi/gss_pname_to_uid.c optional kgssapi kgssapi/gss_release_buffer.c optional kgssapi kgssapi/gss_release_cred.c optional kgssapi kgssapi/gss_release_name.c optional kgssapi kgssapi/gss_release_oid_set.c optional kgssapi kgssapi/gss_set_cred_option.c optional kgssapi kgssapi/gss_test_oid_set_member.c optional kgssapi kgssapi/gss_unwrap.c optional kgssapi kgssapi/gss_verify_mic.c optional kgssapi kgssapi/gss_wrap.c optional kgssapi kgssapi/gss_wrap_size_limit.c optional kgssapi kgssapi/gssd_prot.c optional kgssapi kgssapi/krb5/krb5_mech.c optional kgssapi kgssapi/krb5/kcrypto.c optional kgssapi kgssapi/krb5/kcrypto_aes.c optional kgssapi kgssapi/krb5/kcrypto_arcfour.c optional kgssapi kgssapi/krb5/kcrypto_des.c optional kgssapi kgssapi/krb5/kcrypto_des3.c optional kgssapi kgssapi/kgss_if.m optional kgssapi kgssapi/gsstest.c optional kgssapi_debug # These files in libkern/ are those needed by all architectures. Some # of the files in libkern/ are only needed on some architectures, e.g., # libkern/divdi3.c is needed by i386 but not alpha. Also, some of these # routines may be optimized for a particular platform. In either case, # the file should be moved to conf/files. from here. # libkern/arc4random.c standard crypto/chacha20/chacha.c standard libkern/asprintf.c standard libkern/bcd.c standard libkern/bsearch.c standard libkern/explicit_bzero.c standard libkern/fnmatch.c standard libkern/gsb_crc32.c standard libkern/iconv.c optional libiconv libkern/iconv_converter_if.m optional libiconv libkern/iconv_ucs.c optional libiconv libkern/iconv_xlat.c optional libiconv libkern/iconv_xlat16.c optional libiconv libkern/inet_aton.c standard libkern/inet_ntoa.c standard libkern/inet_ntop.c standard libkern/inet_pton.c standard libkern/jenkins_hash.c standard libkern/murmur3_32.c standard libkern/mcount.c optional profiling-routine libkern/memcchr.c standard libkern/memchr.c standard libkern/memmem.c optional gdb libkern/qsort.c standard libkern/qsort_r.c standard libkern/random.c standard libkern/scanc.c standard libkern/strcasecmp.c standard libkern/strcat.c standard libkern/strchr.c standard libkern/strchrnul.c optional gdb libkern/strcmp.c standard libkern/strcpy.c standard libkern/strcspn.c standard libkern/strdup.c standard libkern/strndup.c standard libkern/strlcat.c standard libkern/strlcpy.c standard libkern/strlen.c standard libkern/strncat.c standard libkern/strncmp.c standard libkern/strncpy.c standard libkern/strnlen.c standard libkern/strrchr.c standard libkern/strsep.c standard libkern/strspn.c standard libkern/strstr.c standard libkern/strtol.c standard libkern/strtoq.c standard libkern/strtoul.c standard libkern/strtouq.c standard libkern/strvalid.c standard libkern/timingsafe_bcmp.c standard contrib/zlib/adler32.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib contrib/zlib/compress.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib \ compile-with "${NORMAL_C} -Wno-cast-qual" contrib/zlib/crc32.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib contrib/zlib/deflate.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib \ compile-with "${NORMAL_C} -Wno-cast-qual" contrib/zlib/inffast.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib contrib/zlib/inflate.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib contrib/zlib/inftrees.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib contrib/zlib/trees.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib contrib/zlib/uncompr.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib \ compile-with "${NORMAL_C} -Wno-cast-qual" contrib/zlib/zutil.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib dev/zlib/zlib_mod.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib dev/zlib/zcalloc.c optional crypto | geom_uzip | ipsec | \ ipsec_support | mxge | ddb_ctf | gzio | zfs | zlib net/altq/altq_cbq.c optional altq net/altq/altq_codel.c optional altq net/altq/altq_hfsc.c optional altq net/altq/altq_fairq.c optional altq net/altq/altq_priq.c optional altq net/altq/altq_red.c optional altq net/altq/altq_rio.c optional altq net/altq/altq_rmclass.c optional altq net/altq/altq_subr.c optional altq net/bpf.c standard net/bpf_buffer.c optional bpf net/bpf_jitter.c optional bpf_jitter net/bpf_filter.c optional bpf | netgraph_bpf net/bpf_zerocopy.c optional bpf net/bridgestp.c optional bridge | if_bridge net/ieee8023ad_lacp.c optional lagg net/if.c standard net/if_bridge.c optional bridge inet | if_bridge inet net/if_clone.c standard net/if_dead.c standard net/if_debug.c optional ddb net/if_disc.c optional disc net/if_edsc.c optional edsc net/if_enc.c optional enc inet | enc inet6 net/if_epair.c optional epair net/if_ethersubr.c optional ether net/if_fwsubr.c optional fwip net/if_gif.c optional gif inet | gif inet6 | \ netgraph_gif inet | netgraph_gif inet6 net/if_gre.c optional gre inet | gre inet6 net/if_ipsec.c optional inet ipsec | inet6 ipsec net/if_lagg.c optional lagg net/if_loop.c optional loop net/if_llatbl.c standard net/if_me.c optional me inet net/if_media.c standard net/if_mib.c standard net/if_spppfr.c optional sppp | netgraph_sppp net/if_spppsubr.c optional sppp | netgraph_sppp net/if_stf.c optional stf inet inet6 net/if_tuntap.c optional tuntap net/if_vlan.c optional vlan net/if_vxlan.c optional vxlan inet | vxlan inet6 net/ifdi_if.m optional ether pci iflib net/iflib.c optional ether pci iflib net/iflib_clone.c optional ether pci iflib net/mp_ring.c optional ether iflib net/mppcc.c optional netgraph_mppc_compression net/mppcd.c optional netgraph_mppc_compression net/netisr.c standard net/pfil.c optional ether | inet net/radix.c standard net/radix_mpath.c standard net/raw_cb.c standard net/raw_usrreq.c standard net/route.c standard net/rss_config.c optional inet rss | inet6 rss net/rtsock.c standard net/slcompress.c optional netgraph_vjc | sppp | \ netgraph_sppp net/toeplitz.c optional inet rss | inet6 rss net/vnet.c optional vimage net80211/ieee80211.c optional wlan net80211/ieee80211_acl.c optional wlan wlan_acl net80211/ieee80211_action.c optional wlan net80211/ieee80211_adhoc.c optional wlan \ compile-with "${NORMAL_C} -Wno-unused-function" net80211/ieee80211_ageq.c optional wlan net80211/ieee80211_amrr.c optional wlan | wlan_amrr net80211/ieee80211_crypto.c optional wlan \ compile-with "${NORMAL_C} -Wno-unused-function" net80211/ieee80211_crypto_ccmp.c optional wlan wlan_ccmp net80211/ieee80211_crypto_none.c optional wlan net80211/ieee80211_crypto_tkip.c optional wlan wlan_tkip net80211/ieee80211_crypto_wep.c optional wlan wlan_wep net80211/ieee80211_ddb.c optional wlan ddb net80211/ieee80211_dfs.c optional wlan net80211/ieee80211_freebsd.c optional wlan net80211/ieee80211_hostap.c optional wlan \ compile-with "${NORMAL_C} -Wno-unused-function" net80211/ieee80211_ht.c optional wlan net80211/ieee80211_hwmp.c optional wlan ieee80211_support_mesh net80211/ieee80211_input.c optional wlan net80211/ieee80211_ioctl.c optional wlan net80211/ieee80211_mesh.c optional wlan ieee80211_support_mesh \ compile-with "${NORMAL_C} -Wno-unused-function" net80211/ieee80211_monitor.c optional wlan net80211/ieee80211_node.c optional wlan net80211/ieee80211_output.c optional wlan net80211/ieee80211_phy.c optional wlan net80211/ieee80211_power.c optional wlan net80211/ieee80211_proto.c optional wlan net80211/ieee80211_radiotap.c optional wlan net80211/ieee80211_ratectl.c optional wlan net80211/ieee80211_ratectl_none.c optional wlan net80211/ieee80211_regdomain.c optional wlan net80211/ieee80211_rssadapt.c optional wlan wlan_rssadapt net80211/ieee80211_scan.c optional wlan net80211/ieee80211_scan_sta.c optional wlan net80211/ieee80211_sta.c optional wlan \ compile-with "${NORMAL_C} -Wno-unused-function" net80211/ieee80211_superg.c optional wlan ieee80211_support_superg net80211/ieee80211_scan_sw.c optional wlan net80211/ieee80211_tdma.c optional wlan ieee80211_support_tdma net80211/ieee80211_vht.c optional wlan net80211/ieee80211_wds.c optional wlan net80211/ieee80211_xauth.c optional wlan wlan_xauth net80211/ieee80211_alq.c optional wlan ieee80211_alq netgraph/atm/ccatm/ng_ccatm.c optional ngatm_ccatm \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" netgraph/atm/ngatmbase.c optional ngatm_atmbase \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" netgraph/atm/sscfu/ng_sscfu.c optional ngatm_sscfu \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" netgraph/atm/sscop/ng_sscop.c optional ngatm_sscop \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" netgraph/atm/uni/ng_uni.c optional ngatm_uni \ compile-with "${NORMAL_C} -I$S/contrib/ngatm" netgraph/bluetooth/common/ng_bluetooth.c optional netgraph_bluetooth netgraph/bluetooth/drivers/bt3c/ng_bt3c_pccard.c optional netgraph_bluetooth_bt3c netgraph/bluetooth/drivers/h4/ng_h4.c optional netgraph_bluetooth_h4 netgraph/bluetooth/drivers/ubt/ng_ubt.c optional netgraph_bluetooth_ubt usb netgraph/bluetooth/drivers/ubt/ng_ubt_intel.c optional netgraph_bluetooth_ubt usb netgraph/bluetooth/drivers/ubtbcmfw/ubtbcmfw.c optional netgraph_bluetooth_ubtbcmfw usb netgraph/bluetooth/hci/ng_hci_cmds.c optional netgraph_bluetooth_hci netgraph/bluetooth/hci/ng_hci_evnt.c optional netgraph_bluetooth_hci netgraph/bluetooth/hci/ng_hci_main.c optional netgraph_bluetooth_hci netgraph/bluetooth/hci/ng_hci_misc.c optional netgraph_bluetooth_hci netgraph/bluetooth/hci/ng_hci_ulpi.c optional netgraph_bluetooth_hci netgraph/bluetooth/l2cap/ng_l2cap_cmds.c optional netgraph_bluetooth_l2cap netgraph/bluetooth/l2cap/ng_l2cap_evnt.c optional netgraph_bluetooth_l2cap netgraph/bluetooth/l2cap/ng_l2cap_llpi.c optional netgraph_bluetooth_l2cap netgraph/bluetooth/l2cap/ng_l2cap_main.c optional netgraph_bluetooth_l2cap netgraph/bluetooth/l2cap/ng_l2cap_misc.c optional netgraph_bluetooth_l2cap netgraph/bluetooth/l2cap/ng_l2cap_ulpi.c optional netgraph_bluetooth_l2cap netgraph/bluetooth/socket/ng_btsocket.c optional netgraph_bluetooth_socket netgraph/bluetooth/socket/ng_btsocket_hci_raw.c optional netgraph_bluetooth_socket netgraph/bluetooth/socket/ng_btsocket_l2cap.c optional netgraph_bluetooth_socket netgraph/bluetooth/socket/ng_btsocket_l2cap_raw.c optional netgraph_bluetooth_socket netgraph/bluetooth/socket/ng_btsocket_rfcomm.c optional netgraph_bluetooth_socket netgraph/bluetooth/socket/ng_btsocket_sco.c optional netgraph_bluetooth_socket netgraph/netflow/netflow.c optional netgraph_netflow netgraph/netflow/netflow_v9.c optional netgraph_netflow netgraph/netflow/ng_netflow.c optional netgraph_netflow netgraph/ng_UI.c optional netgraph_UI netgraph/ng_async.c optional netgraph_async netgraph/ng_atmllc.c optional netgraph_atmllc netgraph/ng_base.c optional netgraph netgraph/ng_bpf.c optional netgraph_bpf netgraph/ng_bridge.c optional netgraph_bridge netgraph/ng_car.c optional netgraph_car netgraph/ng_checksum.c optional netgraph_checksum netgraph/ng_cisco.c optional netgraph_cisco netgraph/ng_deflate.c optional netgraph_deflate netgraph/ng_device.c optional netgraph_device netgraph/ng_echo.c optional netgraph_echo netgraph/ng_eiface.c optional netgraph_eiface netgraph/ng_ether.c optional netgraph_ether netgraph/ng_ether_echo.c optional netgraph_ether_echo netgraph/ng_frame_relay.c optional netgraph_frame_relay netgraph/ng_gif.c optional netgraph_gif inet6 | netgraph_gif inet netgraph/ng_gif_demux.c optional netgraph_gif_demux netgraph/ng_hole.c optional netgraph_hole netgraph/ng_iface.c optional netgraph_iface netgraph/ng_ip_input.c optional netgraph_ip_input netgraph/ng_ipfw.c optional netgraph_ipfw inet ipfirewall netgraph/ng_ksocket.c optional netgraph_ksocket netgraph/ng_l2tp.c optional netgraph_l2tp netgraph/ng_lmi.c optional netgraph_lmi netgraph/ng_mppc.c optional netgraph_mppc_compression | \ netgraph_mppc_encryption netgraph/ng_nat.c optional netgraph_nat inet libalias netgraph/ng_one2many.c optional netgraph_one2many netgraph/ng_parse.c optional netgraph netgraph/ng_patch.c optional netgraph_patch netgraph/ng_pipe.c optional netgraph_pipe netgraph/ng_ppp.c optional netgraph_ppp netgraph/ng_pppoe.c optional netgraph_pppoe netgraph/ng_pptpgre.c optional netgraph_pptpgre netgraph/ng_pred1.c optional netgraph_pred1 netgraph/ng_rfc1490.c optional netgraph_rfc1490 netgraph/ng_socket.c optional netgraph_socket netgraph/ng_split.c optional netgraph_split netgraph/ng_sppp.c optional netgraph_sppp netgraph/ng_tag.c optional netgraph_tag netgraph/ng_tcpmss.c optional netgraph_tcpmss netgraph/ng_tee.c optional netgraph_tee netgraph/ng_tty.c optional netgraph_tty netgraph/ng_vjc.c optional netgraph_vjc netgraph/ng_vlan.c optional netgraph_vlan netinet/accf_data.c optional accept_filter_data inet netinet/accf_dns.c optional accept_filter_dns inet netinet/accf_http.c optional accept_filter_http inet netinet/if_ether.c optional inet ether netinet/igmp.c optional inet netinet/in.c optional inet netinet/in_debug.c optional inet ddb netinet/in_kdtrace.c optional inet | inet6 netinet/ip_carp.c optional inet carp | inet6 carp netinet/in_fib.c optional inet netinet/in_gif.c optional gif inet | netgraph_gif inet netinet/ip_gre.c optional gre inet netinet/ip_id.c optional inet netinet/in_jail.c optional inet netinet/in_mcast.c optional inet netinet/in_pcb.c optional inet | inet6 netinet/in_pcbgroup.c optional inet pcbgroup | inet6 pcbgroup netinet/in_prot.c optional inet | inet6 netinet/in_proto.c optional inet | inet6 netinet/in_rmx.c optional inet netinet/in_rss.c optional inet rss netinet/ip_divert.c optional inet ipdivert ipfirewall netinet/ip_ecn.c optional inet | inet6 netinet/ip_encap.c optional inet | inet6 netinet/ip_fastfwd.c optional inet netinet/ip_icmp.c optional inet | inet6 netinet/ip_input.c optional inet netinet/ip_mroute.c optional mrouting inet netinet/ip_options.c optional inet netinet/ip_output.c optional inet netinet/ip_reass.c optional inet netinet/raw_ip.c optional inet | inet6 netinet/cc/cc.c optional inet | inet6 netinet/cc/cc_newreno.c optional inet | inet6 netinet/sctp_asconf.c optional inet sctp | inet6 sctp netinet/sctp_auth.c optional inet sctp | inet6 sctp netinet/sctp_bsd_addr.c optional inet sctp | inet6 sctp netinet/sctp_cc_functions.c optional inet sctp | inet6 sctp netinet/sctp_crc32.c optional inet | inet6 netinet/sctp_indata.c optional inet sctp | inet6 sctp netinet/sctp_input.c optional inet sctp | inet6 sctp netinet/sctp_output.c optional inet sctp | inet6 sctp netinet/sctp_pcb.c optional inet sctp | inet6 sctp netinet/sctp_peeloff.c optional inet sctp | inet6 sctp netinet/sctp_ss_functions.c optional inet sctp | inet6 sctp netinet/sctp_syscalls.c optional inet sctp | inet6 sctp netinet/sctp_sysctl.c optional inet sctp | inet6 sctp netinet/sctp_timer.c optional inet sctp | inet6 sctp netinet/sctp_usrreq.c optional inet sctp | inet6 sctp netinet/sctputil.c optional inet sctp | inet6 sctp netinet/siftr.c optional inet siftr alq | inet6 siftr alq netinet/tcp_debug.c optional tcpdebug netinet/tcp_fastopen.c optional inet tcp_rfc7413 | inet6 tcp_rfc7413 netinet/tcp_hostcache.c optional inet | inet6 netinet/tcp_input.c optional inet | inet6 netinet/tcp_log_buf.c optional tcp_blackbox inet | tcp_blackbox inet6 netinet/tcp_lro.c optional inet | inet6 netinet/tcp_output.c optional inet | inet6 netinet/tcp_offload.c optional tcp_offload inet | tcp_offload inet6 netinet/tcp_hpts.c optional tcphpts inet | tcphpts inet6 netinet/tcp_ratelimit.c optional ratelimit inet | ratelimit inet6 netinet/tcp_pcap.c optional inet tcppcap | inet6 tcppcap \ compile-with "${NORMAL_C} ${NO_WNONNULL}" netinet/tcp_reass.c optional inet | inet6 netinet/tcp_sack.c optional inet | inet6 netinet/tcp_subr.c optional inet | inet6 netinet/tcp_syncache.c optional inet | inet6 netinet/tcp_timer.c optional inet | inet6 netinet/tcp_timewait.c optional inet | inet6 netinet/tcp_usrreq.c optional inet | inet6 netinet/udp_usrreq.c optional inet | inet6 netinet/libalias/alias.c optional libalias inet | netgraph_nat inet netinet/libalias/alias_db.c optional libalias inet | netgraph_nat inet netinet/libalias/alias_mod.c optional libalias | netgraph_nat netinet/libalias/alias_proxy.c optional libalias inet | netgraph_nat inet netinet/libalias/alias_util.c optional libalias inet | netgraph_nat inet netinet/libalias/alias_sctp.c optional libalias inet | netgraph_nat inet netinet/netdump/netdump_client.c optional inet netdump netinet6/dest6.c optional inet6 netinet6/frag6.c optional inet6 netinet6/icmp6.c optional inet6 netinet6/in6.c optional inet6 netinet6/in6_cksum.c optional inet6 netinet6/in6_fib.c optional inet6 netinet6/in6_gif.c optional gif inet6 | netgraph_gif inet6 netinet6/in6_ifattach.c optional inet6 netinet6/in6_jail.c optional inet6 netinet6/in6_mcast.c optional inet6 netinet6/in6_pcb.c optional inet6 netinet6/in6_pcbgroup.c optional inet6 pcbgroup netinet6/in6_proto.c optional inet6 netinet6/in6_rmx.c optional inet6 netinet6/in6_rss.c optional inet6 rss netinet6/in6_src.c optional inet6 netinet6/ip6_fastfwd.c optional inet6 netinet6/ip6_forward.c optional inet6 netinet6/ip6_gre.c optional gre inet6 netinet6/ip6_id.c optional inet6 netinet6/ip6_input.c optional inet6 netinet6/ip6_mroute.c optional mrouting inet6 netinet6/ip6_output.c optional inet6 netinet6/mld6.c optional inet6 netinet6/nd6.c optional inet6 netinet6/nd6_nbr.c optional inet6 netinet6/nd6_rtr.c optional inet6 netinet6/raw_ip6.c optional inet6 netinet6/route6.c optional inet6 netinet6/scope6.c optional inet6 netinet6/sctp6_usrreq.c optional inet6 sctp netinet6/udp6_usrreq.c optional inet6 netipsec/ipsec.c optional ipsec inet | ipsec inet6 netipsec/ipsec_input.c optional ipsec inet | ipsec inet6 netipsec/ipsec_mbuf.c optional ipsec inet | ipsec inet6 netipsec/ipsec_mod.c optional ipsec inet | ipsec inet6 netipsec/ipsec_output.c optional ipsec inet | ipsec inet6 netipsec/ipsec_pcb.c optional ipsec inet | ipsec inet6 | \ ipsec_support inet | ipsec_support inet6 netipsec/key.c optional ipsec inet | ipsec inet6 | \ ipsec_support inet | ipsec_support inet6 netipsec/key_debug.c optional ipsec inet | ipsec inet6 | \ ipsec_support inet | ipsec_support inet6 netipsec/keysock.c optional ipsec inet | ipsec inet6 | \ ipsec_support inet | ipsec_support inet6 netipsec/subr_ipsec.c optional ipsec inet | ipsec inet6 | \ ipsec_support inet | ipsec_support inet6 netipsec/udpencap.c optional ipsec inet netipsec/xform_ah.c optional ipsec inet | ipsec inet6 netipsec/xform_esp.c optional ipsec inet | ipsec inet6 netipsec/xform_ipcomp.c optional ipsec inet | ipsec inet6 netipsec/xform_tcp.c optional ipsec inet tcp_signature | \ ipsec inet6 tcp_signature | ipsec_support inet tcp_signature | \ ipsec_support inet6 tcp_signature netpfil/ipfw/dn_aqm_codel.c optional inet dummynet netpfil/ipfw/dn_aqm_pie.c optional inet dummynet netpfil/ipfw/dn_heap.c optional inet dummynet netpfil/ipfw/dn_sched_fifo.c optional inet dummynet netpfil/ipfw/dn_sched_fq_codel.c optional inet dummynet netpfil/ipfw/dn_sched_fq_pie.c optional inet dummynet netpfil/ipfw/dn_sched_prio.c optional inet dummynet netpfil/ipfw/dn_sched_qfq.c optional inet dummynet netpfil/ipfw/dn_sched_rr.c optional inet dummynet netpfil/ipfw/dn_sched_wf2q.c optional inet dummynet netpfil/ipfw/ip_dummynet.c optional inet dummynet netpfil/ipfw/ip_dn_io.c optional inet dummynet netpfil/ipfw/ip_dn_glue.c optional inet dummynet netpfil/ipfw/ip_fw2.c optional inet ipfirewall netpfil/ipfw/ip_fw_bpf.c optional inet ipfirewall netpfil/ipfw/ip_fw_dynamic.c optional inet ipfirewall \ compile-with "${NORMAL_C} -I$S/contrib/ck/include" netpfil/ipfw/ip_fw_eaction.c optional inet ipfirewall netpfil/ipfw/ip_fw_log.c optional inet ipfirewall netpfil/ipfw/ip_fw_pfil.c optional inet ipfirewall netpfil/ipfw/ip_fw_sockopt.c optional inet ipfirewall netpfil/ipfw/ip_fw_table.c optional inet ipfirewall netpfil/ipfw/ip_fw_table_algo.c optional inet ipfirewall netpfil/ipfw/ip_fw_table_value.c optional inet ipfirewall netpfil/ipfw/ip_fw_iface.c optional inet ipfirewall netpfil/ipfw/ip_fw_nat.c optional inet ipfirewall_nat netpfil/ipfw/nat64/ip_fw_nat64.c optional inet inet6 ipfirewall \ ipfirewall_nat64 netpfil/ipfw/nat64/nat64clat.c optional inet inet6 ipfirewall \ ipfirewall_nat64 netpfil/ipfw/nat64/nat64clat_control.c optional inet inet6 ipfirewall \ ipfirewall_nat64 netpfil/ipfw/nat64/nat64lsn.c optional inet inet6 ipfirewall \ ipfirewall_nat64 compile-with "${NORMAL_C} -I$S/contrib/ck/include" netpfil/ipfw/nat64/nat64lsn_control.c optional inet inet6 ipfirewall \ ipfirewall_nat64 compile-with "${NORMAL_C} -I$S/contrib/ck/include" netpfil/ipfw/nat64/nat64stl.c optional inet inet6 ipfirewall \ ipfirewall_nat64 netpfil/ipfw/nat64/nat64stl_control.c optional inet inet6 ipfirewall \ ipfirewall_nat64 netpfil/ipfw/nat64/nat64_translate.c optional inet inet6 ipfirewall \ ipfirewall_nat64 netpfil/ipfw/nptv6/ip_fw_nptv6.c optional inet inet6 ipfirewall \ ipfirewall_nptv6 netpfil/ipfw/nptv6/nptv6.c optional inet inet6 ipfirewall \ ipfirewall_nptv6 netpfil/ipfw/pmod/ip_fw_pmod.c optional inet ipfirewall_pmod netpfil/ipfw/pmod/tcpmod.c optional inet ipfirewall_pmod netpfil/pf/if_pflog.c optional pflog pf inet netpfil/pf/if_pfsync.c optional pfsync pf inet netpfil/pf/pf.c optional pf inet netpfil/pf/pf_if.c optional pf inet netpfil/pf/pf_ioctl.c optional pf inet netpfil/pf/pf_lb.c optional pf inet netpfil/pf/pf_norm.c optional pf inet netpfil/pf/pf_osfp.c optional pf inet netpfil/pf/pf_ruleset.c optional pf inet netpfil/pf/pf_table.c optional pf inet netpfil/pf/in4_cksum.c optional pf inet netsmb/smb_conn.c optional netsmb netsmb/smb_crypt.c optional netsmb netsmb/smb_dev.c optional netsmb netsmb/smb_iod.c optional netsmb netsmb/smb_rq.c optional netsmb netsmb/smb_smb.c optional netsmb netsmb/smb_subr.c optional netsmb netsmb/smb_trantcp.c optional netsmb netsmb/smb_usr.c optional netsmb nfs/bootp_subr.c optional bootp nfscl nfs/krpc_subr.c optional bootp nfscl nfs/nfs_diskless.c optional nfscl nfs_root nfs/nfs_fha.c optional nfsd nfs/nfs_lock.c optional nfscl | nfslockd | nfsd nfs/nfs_nfssvc.c optional nfscl | nfsd nlm/nlm_advlock.c optional nfslockd | nfsd nlm/nlm_prot_clnt.c optional nfslockd | nfsd nlm/nlm_prot_impl.c optional nfslockd | nfsd nlm/nlm_prot_server.c optional nfslockd | nfsd nlm/nlm_prot_svc.c optional nfslockd | nfsd nlm/nlm_prot_xdr.c optional nfslockd | nfsd nlm/sm_inter_xdr.c optional nfslockd | nfsd # Linux Kernel Programming Interface compat/linuxkpi/common/src/linux_kmod.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_compat.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_current.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_hrtimer.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_kthread.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_lock.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_page.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_pci.c optional compat_linuxkpi pci \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_tasklet.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_idr.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_radix.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_rcu.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C} -I$S/contrib/ck/include" compat/linuxkpi/common/src/linux_schedule.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_slab.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_usb.c optional compat_linuxkpi usb \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_work.c optional compat_linuxkpi \ compile-with "${LINUXKPI_C}" compat/linuxkpi/common/src/linux_seq_file.c optional compat_linuxkpi | lindebugfs \ compile-with "${LINUXKPI_C}" compat/lindebugfs/lindebugfs.c optional lindebugfs \ compile-with "${LINUXKPI_C}" # OpenFabrics Enterprise Distribution (Infiniband) ofed/drivers/infiniband/core/ib_addr.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_agent.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_cache.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_cm.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_cma.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_cq.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_device.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_fmr_pool.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_iwcm.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_iwpm_msg.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_iwpm_util.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_mad.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_mad_rmpp.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_multicast.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_packer.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_roce_gid_mgmt.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_sa_query.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_smi.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_sysfs.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_ucm.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_ucma.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_ud_header.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_umem.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_user_mad.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_uverbs_cmd.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_uverbs_main.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_uverbs_marshall.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/core/ib_verbs.c optional ofed \ compile-with "${OFED_C}" ofed/drivers/infiniband/ulp/ipoib/ipoib_cm.c optional ipoib \ compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/ipoib/" #ofed/drivers/infiniband/ulp/ipoib/ipoib_fs.c optional ipoib \ # compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/ipoib/" ofed/drivers/infiniband/ulp/ipoib/ipoib_ib.c optional ipoib \ compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/ipoib/" ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c optional ipoib \ compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/ipoib/" ofed/drivers/infiniband/ulp/ipoib/ipoib_multicast.c optional ipoib \ compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/ipoib/" ofed/drivers/infiniband/ulp/ipoib/ipoib_verbs.c optional ipoib \ compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/ipoib/" #ofed/drivers/infiniband/ulp/ipoib/ipoib_vlan.c optional ipoib \ # compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/ipoib/" ofed/drivers/infiniband/ulp/sdp/sdp_bcopy.c optional sdp inet \ compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/sdp/" ofed/drivers/infiniband/ulp/sdp/sdp_main.c optional sdp inet \ compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/sdp/" ofed/drivers/infiniband/ulp/sdp/sdp_rx.c optional sdp inet \ compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/sdp/" ofed/drivers/infiniband/ulp/sdp/sdp_cma.c optional sdp inet \ compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/sdp/" ofed/drivers/infiniband/ulp/sdp/sdp_tx.c optional sdp inet \ compile-with "${OFED_C} -I$S/ofed/drivers/infiniband/ulp/sdp/" dev/mthca/mthca_allocator.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_av.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_catas.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_cmd.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_cq.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_eq.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_mad.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_main.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_mcg.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_memfree.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_mr.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_pd.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_profile.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_provider.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_qp.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_reset.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_srq.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mthca/mthca_uar.c optional mthca pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_alias_GUID.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_mcg.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_sysfs.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_cm.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_ah.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_cq.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_doorbell.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_mad.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_main.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_mr.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_qp.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_srq.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_ib/mlx4_ib_wc.c optional mlx4ib pci ofed \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_alloc.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_catas.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_cmd.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_cq.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_eq.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_fw.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_fw_qos.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_icm.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_intf.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_main.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_mcg.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_mr.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_pd.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_port.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_profile.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_qp.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_reset.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_sense.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_srq.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_core/mlx4_resource_tracker.c optional mlx4 pci \ compile-with "${OFED_C}" dev/mlx4/mlx4_en/mlx4_en_cq.c optional mlx4en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx4/mlx4_en/mlx4_en_main.c optional mlx4en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx4/mlx4_en/mlx4_en_netdev.c optional mlx4en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx4/mlx4_en/mlx4_en_port.c optional mlx4en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx4/mlx4_en/mlx4_en_resources.c optional mlx4en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx4/mlx4_en/mlx4_en_rx.c optional mlx4en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx4/mlx4_en/mlx4_en_tx.c optional mlx4en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_ah.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_cong.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_cq.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_doorbell.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_gsi.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_mad.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_main.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_mem.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_mr.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_qp.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_srq.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_ib/mlx5_ib_virt.c optional mlx5ib pci ofed \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_alloc.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_cmd.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_cq.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_diagnostics.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_eq.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_fs_cmd.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_fs_tree.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_fw.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_fwdump.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_fwdump_regmaps.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_health.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_mad.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_main.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_mcg.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_mr.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_pagealloc.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_pd.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_port.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_qp.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_rl.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_srq.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_transobj.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_uar.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_vport.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_vsc.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_core/mlx5_wq.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_lib/mlx5_gid.c optional mlx5 pci \ compile-with "${OFED_C}" dev/mlx5/mlx5_en/mlx5_en_dim.c optional mlx5en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx5/mlx5_en/mlx5_en_ethtool.c optional mlx5en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx5/mlx5_en/mlx5_en_main.c optional mlx5en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx5/mlx5_en/mlx5_en_tx.c optional mlx5en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx5/mlx5_en/mlx5_en_flow_table.c optional mlx5en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx5/mlx5_en/mlx5_en_rx.c optional mlx5en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx5/mlx5_en/mlx5_en_rl.c optional mlx5en pci inet inet6 \ compile-with "${OFED_C}" dev/mlx5/mlx5_en/mlx5_en_txrx.c optional mlx5en pci inet inet6 \ compile-with "${OFED_C}" # crypto support opencrypto/cast.c optional crypto | ipsec | ipsec_support opencrypto/criov.c optional crypto | ipsec | ipsec_support opencrypto/crypto.c optional crypto | ipsec | ipsec_support opencrypto/cryptodev.c optional cryptodev opencrypto/cryptodev_if.m optional crypto | ipsec | ipsec_support opencrypto/cryptosoft.c optional crypto | ipsec | ipsec_support opencrypto/cryptodeflate.c optional crypto | ipsec | ipsec_support opencrypto/gmac.c optional crypto | ipsec | ipsec_support opencrypto/gfmult.c optional crypto | ipsec | ipsec_support opencrypto/rmd160.c optional crypto | ipsec | ipsec_support opencrypto/skipjack.c optional crypto | ipsec | ipsec_support opencrypto/xform.c optional crypto | ipsec | ipsec_support opencrypto/xform_poly1305.c optional crypto \ compile-with "${NORMAL_C} -I$S/contrib/libsodium/src/libsodium/include -I$S/crypto/libsodium" contrib/libsodium/src/libsodium/crypto_onetimeauth/poly1305/onetimeauth_poly1305.c \ optional crypto \ compile-with "${NORMAL_C} -I$S/contrib/libsodium/src/libsodium/include/sodium -I$S/crypto/libsodium" contrib/libsodium/src/libsodium/crypto_onetimeauth/poly1305/donna/poly1305_donna.c \ optional crypto \ compile-with "${NORMAL_C} -I$S/contrib/libsodium/src/libsodium/include/sodium -I$S/crypto/libsodium" contrib/libsodium/src/libsodium/crypto_verify/sodium/verify.c \ optional crypto \ compile-with "${NORMAL_C} -I$S/contrib/libsodium/src/libsodium/include/sodium -I$S/crypto/libsodium" crypto/libsodium/randombytes.c optional crypto \ compile-with "${NORMAL_C} -I$S/contrib/libsodium/src/libsodium/include -I$S/crypto/libsodium" crypto/libsodium/utils.c optional crypto \ compile-with "${NORMAL_C} -I$S/contrib/libsodium/src/libsodium/include -I$S/crypto/libsodium" opencrypto/cbc_mac.c optional crypto opencrypto/xform_cbc_mac.c optional crypto rpc/auth_none.c optional krpc | nfslockd | nfscl | nfsd rpc/auth_unix.c optional krpc | nfslockd | nfscl | nfsd rpc/authunix_prot.c optional krpc | nfslockd | nfscl | nfsd rpc/clnt_bck.c optional krpc | nfslockd | nfscl | nfsd rpc/clnt_dg.c optional krpc | nfslockd | nfscl | nfsd rpc/clnt_rc.c optional krpc | nfslockd | nfscl | nfsd rpc/clnt_vc.c optional krpc | nfslockd | nfscl | nfsd rpc/getnetconfig.c optional krpc | nfslockd | nfscl | nfsd rpc/replay.c optional krpc | nfslockd | nfscl | nfsd rpc/rpc_callmsg.c optional krpc | nfslockd | nfscl | nfsd rpc/rpc_generic.c optional krpc | nfslockd | nfscl | nfsd rpc/rpc_prot.c optional krpc | nfslockd | nfscl | nfsd rpc/rpcb_clnt.c optional krpc | nfslockd | nfscl | nfsd rpc/rpcb_prot.c optional krpc | nfslockd | nfscl | nfsd rpc/svc.c optional krpc | nfslockd | nfscl | nfsd rpc/svc_auth.c optional krpc | nfslockd | nfscl | nfsd rpc/svc_auth_unix.c optional krpc | nfslockd | nfscl | nfsd rpc/svc_dg.c optional krpc | nfslockd | nfscl | nfsd rpc/svc_generic.c optional krpc | nfslockd | nfscl | nfsd rpc/svc_vc.c optional krpc | nfslockd | nfscl | nfsd rpc/rpcsec_gss/rpcsec_gss.c optional krpc kgssapi | nfslockd kgssapi | nfscl kgssapi | nfsd kgssapi rpc/rpcsec_gss/rpcsec_gss_conf.c optional krpc kgssapi | nfslockd kgssapi | nfscl kgssapi | nfsd kgssapi rpc/rpcsec_gss/rpcsec_gss_misc.c optional krpc kgssapi | nfslockd kgssapi | nfscl kgssapi | nfsd kgssapi rpc/rpcsec_gss/rpcsec_gss_prot.c optional krpc kgssapi | nfslockd kgssapi | nfscl kgssapi | nfsd kgssapi rpc/rpcsec_gss/svc_rpcsec_gss.c optional krpc kgssapi | nfslockd kgssapi | nfscl kgssapi | nfsd kgssapi security/audit/audit.c optional audit security/audit/audit_arg.c optional audit security/audit/audit_bsm.c optional audit security/audit/audit_bsm_db.c optional audit security/audit/audit_bsm_klib.c optional audit security/audit/audit_dtrace.c optional dtaudit audit | dtraceall audit compile-with "${CDDL_C}" security/audit/audit_pipe.c optional audit security/audit/audit_syscalls.c standard security/audit/audit_trigger.c optional audit security/audit/audit_worker.c optional audit security/audit/bsm_domain.c optional audit security/audit/bsm_errno.c optional audit security/audit/bsm_fcntl.c optional audit security/audit/bsm_socket_type.c optional audit security/audit/bsm_token.c optional audit security/mac/mac_audit.c optional mac audit security/mac/mac_cred.c optional mac security/mac/mac_framework.c optional mac security/mac/mac_inet.c optional mac inet | mac inet6 security/mac/mac_inet6.c optional mac inet6 security/mac/mac_label.c optional mac security/mac/mac_net.c optional mac security/mac/mac_pipe.c optional mac security/mac/mac_posix_sem.c optional mac security/mac/mac_posix_shm.c optional mac security/mac/mac_priv.c optional mac security/mac/mac_process.c optional mac security/mac/mac_socket.c optional mac security/mac/mac_syscalls.c standard security/mac/mac_system.c optional mac security/mac/mac_sysv_msg.c optional mac security/mac/mac_sysv_sem.c optional mac security/mac/mac_sysv_shm.c optional mac security/mac/mac_vfs.c optional mac security/mac_biba/mac_biba.c optional mac_biba security/mac_bsdextended/mac_bsdextended.c optional mac_bsdextended security/mac_bsdextended/ugidfw_system.c optional mac_bsdextended security/mac_bsdextended/ugidfw_vnode.c optional mac_bsdextended security/mac_ifoff/mac_ifoff.c optional mac_ifoff security/mac_lomac/mac_lomac.c optional mac_lomac security/mac_mls/mac_mls.c optional mac_mls security/mac_none/mac_none.c optional mac_none security/mac_ntpd/mac_ntpd.c optional mac_ntpd security/mac_partition/mac_partition.c optional mac_partition security/mac_portacl/mac_portacl.c optional mac_portacl security/mac_seeotheruids/mac_seeotheruids.c optional mac_seeotheruids security/mac_stub/mac_stub.c optional mac_stub security/mac_test/mac_test.c optional mac_test security/mac_veriexec/mac_veriexec.c optional mac_veriexec security/mac_veriexec/veriexec_fingerprint.c optional mac_veriexec security/mac_veriexec/veriexec_metadata.c optional mac_veriexec security/mac_veriexec_parser/mac_veriexec_parser.c optional mac_veriexec mac_veriexec_parser security/mac_veriexec/mac_veriexec_rmd160.c optional mac_veriexec_rmd160 security/mac_veriexec/mac_veriexec_sha1.c optional mac_veriexec_sha1 security/mac_veriexec/mac_veriexec_sha256.c optional mac_veriexec_sha256 security/mac_veriexec/mac_veriexec_sha384.c optional mac_veriexec_sha384 security/mac_veriexec/mac_veriexec_sha512.c optional mac_veriexec_sha512 teken/teken.c optional sc !SC_NO_TERM_TEKEN | vt ufs/ffs/ffs_alloc.c optional ffs ufs/ffs/ffs_balloc.c optional ffs ufs/ffs/ffs_inode.c optional ffs ufs/ffs/ffs_snapshot.c optional ffs ufs/ffs/ffs_softdep.c optional ffs ufs/ffs/ffs_subr.c optional ffs | geom_label ufs/ffs/ffs_tables.c optional ffs | geom_label ufs/ffs/ffs_vfsops.c optional ffs ufs/ffs/ffs_vnops.c optional ffs ufs/ffs/ffs_rawread.c optional ffs directio ufs/ffs/ffs_suspend.c optional ffs ufs/ufs/ufs_acl.c optional ffs ufs/ufs/ufs_bmap.c optional ffs ufs/ufs/ufs_dirhash.c optional ffs ufs/ufs/ufs_extattr.c optional ffs ufs/ufs/ufs_gjournal.c optional ffs UFS_GJOURNAL ufs/ufs/ufs_inode.c optional ffs ufs/ufs/ufs_lookup.c optional ffs ufs/ufs/ufs_quota.c optional ffs ufs/ufs/ufs_vfsops.c optional ffs ufs/ufs/ufs_vnops.c optional ffs vm/default_pager.c standard vm/device_pager.c standard vm/phys_pager.c standard vm/redzone.c optional DEBUG_REDZONE vm/sg_pager.c standard vm/swap_pager.c standard vm/uma_core.c standard vm/uma_dbg.c standard vm/memguard.c optional DEBUG_MEMGUARD vm/vm_domainset.c standard vm/vm_fault.c standard vm/vm_glue.c standard vm/vm_init.c standard vm/vm_kern.c standard vm/vm_map.c standard vm/vm_meter.c standard vm/vm_mmap.c standard vm/vm_object.c standard vm/vm_page.c standard vm/vm_pageout.c standard vm/vm_pager.c standard vm/vm_phys.c standard vm/vm_radix.c standard vm/vm_reserv.c standard vm/vm_swapout.c optional !NO_SWAPPING vm/vm_swapout_dummy.c optional NO_SWAPPING vm/vm_unix.c standard vm/vnode_pager.c standard xen/features.c optional xenhvm xen/xenbus/xenbus_if.m optional xenhvm xen/xenbus/xenbus.c optional xenhvm xen/xenbus/xenbusb_if.m optional xenhvm xen/xenbus/xenbusb.c optional xenhvm xen/xenbus/xenbusb_front.c optional xenhvm xen/xenbus/xenbusb_back.c optional xenhvm xen/xenmem/xenmem_if.m optional xenhvm xdr/xdr.c optional krpc | nfslockd | nfscl | nfsd xdr/xdr_array.c optional krpc | nfslockd | nfscl | nfsd xdr/xdr_mbuf.c optional krpc | nfslockd | nfscl | nfsd xdr/xdr_mem.c optional krpc | nfslockd | nfscl | nfsd xdr/xdr_reference.c optional krpc | nfslockd | nfscl | nfsd xdr/xdr_sizeof.c optional krpc | nfslockd | nfscl | nfsd Index: head/sys/kern/subr_filter.c =================================================================== --- head/sys/kern/subr_filter.c (nonexistent) +++ head/sys/kern/subr_filter.c (revision 352657) @@ -0,0 +1,482 @@ +/*- + * Copyright (c) 2016-2019 Netflix, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Author: Randall Stewart + */ +#include +__FBSDID("$FreeBSD$"); +#include +#include +#include +#include + +void +reset_time(struct time_filter *tf, uint32_t time_len) +{ + tf->cur_time_limit = time_len; +} + +void +reset_time_small(struct time_filter_small *tf, uint32_t time_len) +{ + tf->cur_time_limit = time_len; +} + +/* + * A time filter can be a filter for MIN or MAX. + * You call setup_time_filter() with the pointer to + * the filter structure, the type (FILTER_TYPE_MIN/MAX) and + * the time length. You can optionally reset the time length + * later with reset_time(). + * + * You generally call apply_filter_xxx() to apply the new value + * to the filter. You also provide a time (now). The filter will + * age out entries based on the time now and your time limit + * so that you are always maintaining the min or max in that + * window of time. Time is a relative thing, it might be ticks + * in milliseconds, it might be round trip times, its really + * up to you to decide what it is. + * + * To access the current flitered value you can use the macro + * get_filter_value() which returns the correct entry that + * has the "current" value in the filter. + * + * One thing that used to be here is a single apply_filter(). But + * this meant that we then had to store the type of filter in + * the time_filter structure. In order to keep it at a cache + * line size I split it to two functions. + * + */ +int +setup_time_filter(struct time_filter *tf, int fil_type, uint32_t time_len) +{ + uint64_t set_val; + int i; + + /* + * You must specify either a MIN or MAX filter, + * though its up to the user to use the correct + * apply. + */ + if ((fil_type != FILTER_TYPE_MIN) && + (fil_type != FILTER_TYPE_MAX)) + return(EINVAL); + + if (time_len < NUM_FILTER_ENTRIES) + return(EINVAL); + + if (fil_type == FILTER_TYPE_MIN) + set_val = 0xffffffffffffffff; + else + set_val = 0; + + for(i=0; ientries[i].value = set_val; + tf->entries[i].time_up = 0; + } + tf->cur_time_limit = time_len; + return(0); +} + +int +setup_time_filter_small(struct time_filter_small *tf, int fil_type, uint32_t time_len) +{ + uint32_t set_val; + int i; + + /* + * You must specify either a MIN or MAX filter, + * though its up to the user to use the correct + * apply. + */ + if ((fil_type != FILTER_TYPE_MIN) && + (fil_type != FILTER_TYPE_MAX)) + return(EINVAL); + + if (time_len < NUM_FILTER_ENTRIES) + return(EINVAL); + + if (fil_type == FILTER_TYPE_MIN) + set_val = 0xffffffff; + else + set_val = 0; + + for(i=0; ientries[i].value = set_val; + tf->entries[i].time_up = 0; + } + tf->cur_time_limit = time_len; + return(0); +} + + +static void +check_update_times(struct time_filter *tf, uint64_t value, uint32_t now) +{ + int i, j, fnd; + uint32_t tim; + uint32_t time_limit; + for(i=0; i<(NUM_FILTER_ENTRIES-1); i++) { + tim = now - tf->entries[i].time_up; + time_limit = (tf->cur_time_limit * (NUM_FILTER_ENTRIES-i))/NUM_FILTER_ENTRIES; + if (tim >= time_limit) { + fnd = 0; + for(j=(i+1); jentries[i].time_up < tf->entries[j].time_up) { + tf->entries[i].value = tf->entries[j].value; + tf->entries[i].time_up = tf->entries[j].time_up; + fnd = 1; + break; + } + } + if (fnd == 0) { + /* Nothing but the same old entry */ + tf->entries[i].value = value; + tf->entries[i].time_up = now; + } + } + } + i = NUM_FILTER_ENTRIES-1; + tim = now - tf->entries[i].time_up; + time_limit = (tf->cur_time_limit * (NUM_FILTER_ENTRIES-i))/NUM_FILTER_ENTRIES; + if (tim >= time_limit) { + tf->entries[i].value = value; + tf->entries[i].time_up = now; + } +} + +static void +check_update_times_small(struct time_filter_small *tf, uint32_t value, uint32_t now) +{ + int i, j, fnd; + uint32_t tim; + uint32_t time_limit; + for(i=0; i<(NUM_FILTER_ENTRIES-1); i++) { + tim = now - tf->entries[i].time_up; + time_limit = (tf->cur_time_limit * (NUM_FILTER_ENTRIES-i))/NUM_FILTER_ENTRIES; + if (tim >= time_limit) { + fnd = 0; + for(j=(i+1); jentries[i].time_up < tf->entries[j].time_up) { + tf->entries[i].value = tf->entries[j].value; + tf->entries[i].time_up = tf->entries[j].time_up; + fnd = 1; + break; + } + } + if (fnd == 0) { + /* Nothing but the same old entry */ + tf->entries[i].value = value; + tf->entries[i].time_up = now; + } + } + } + i = NUM_FILTER_ENTRIES-1; + tim = now - tf->entries[i].time_up; + time_limit = (tf->cur_time_limit * (NUM_FILTER_ENTRIES-i))/NUM_FILTER_ENTRIES; + if (tim >= time_limit) { + tf->entries[i].value = value; + tf->entries[i].time_up = now; + } +} + + + +void +filter_reduce_by(struct time_filter *tf, uint64_t reduce_by, uint32_t now) +{ + int i; + /* + * Reduce our filter main by reduce_by and + * update its time. Then walk other's and + * make them the new value too. + */ + if (reduce_by < tf->entries[0].value) + tf->entries[0].value -= reduce_by; + else + tf->entries[0].value = 0; + tf->entries[0].time_up = now; + for(i=1; ientries[i].value = tf->entries[0].value; + tf->entries[i].time_up = now; + } +} + +void +filter_reduce_by_small(struct time_filter_small *tf, uint32_t reduce_by, uint32_t now) +{ + int i; + /* + * Reduce our filter main by reduce_by and + * update its time. Then walk other's and + * make them the new value too. + */ + if (reduce_by < tf->entries[0].value) + tf->entries[0].value -= reduce_by; + else + tf->entries[0].value = 0; + tf->entries[0].time_up = now; + for(i=1; ientries[i].value = tf->entries[0].value; + tf->entries[i].time_up = now; + } +} + +void +filter_increase_by(struct time_filter *tf, uint64_t incr_by, uint32_t now) +{ + int i; + /* + * Increase our filter main by incr_by and + * update its time. Then walk other's and + * make them the new value too. + */ + tf->entries[0].value += incr_by; + tf->entries[0].time_up = now; + for(i=1; ientries[i].value = tf->entries[0].value; + tf->entries[i].time_up = now; + } +} + +void +filter_increase_by_small(struct time_filter_small *tf, uint32_t incr_by, uint32_t now) +{ + int i; + /* + * Increase our filter main by incr_by and + * update its time. Then walk other's and + * make them the new value too. + */ + tf->entries[0].value += incr_by; + tf->entries[0].time_up = now; + for(i=1; ientries[i].value = tf->entries[0].value; + tf->entries[i].time_up = now; + } +} + +void +forward_filter_clock(struct time_filter *tf, uint32_t ticks_forward) +{ + /* + * Bring forward all time values by N ticks. This + * postpones expiring slots by that amount. + */ + int i; + + for(i=0; ientries[i].time_up += ticks_forward; + } +} + + +void +forward_filter_clock_small(struct time_filter_small *tf, uint32_t ticks_forward) +{ + /* + * Bring forward all time values by N ticks. This + * postpones expiring slots by that amount. + */ + int i; + + for(i=0; ientries[i].time_up += ticks_forward; + } +} + + +void +tick_filter_clock(struct time_filter *tf, uint32_t now) +{ + int i; + uint32_t tim, time_limit; + + /* + * We start at two positions back. This + * is because the oldest worst value is + * preserved always, i.e. it can't expire + * due to clock ticking with no updated value. + * + * The other choice would be to fill it in with + * zero, but I don't like that option since + * some measurement is better than none (even + * if its your oldest measurment). + */ + for(i=(NUM_FILTER_ENTRIES-2); i>=0 ; i--) { + tim = now - tf->entries[i].time_up; + time_limit = (tf->cur_time_limit * (NUM_FILTER_ENTRIES-i))/NUM_FILTER_ENTRIES; + if (tim >= time_limit) { + /* + * This entry is expired, pull down + * the next one up. + */ + tf->entries[i].value = tf->entries[(i+1)].value; + tf->entries[i].time_up = tf->entries[(i+1)].time_up; + } + + } +} + +void +tick_filter_clock_small(struct time_filter_small *tf, uint32_t now) +{ + int i; + uint32_t tim, time_limit; + + /* + * We start at two positions back. This + * is because the oldest worst value is + * preserved always, i.e. it can't expire + * due to clock ticking with no updated value. + * + * The other choice would be to fill it in with + * zero, but I don't like that option since + * some measurement is better than none (even + * if its your oldest measurment). + */ + for(i=(NUM_FILTER_ENTRIES-2); i>=0 ; i--) { + tim = now - tf->entries[i].time_up; + time_limit = (tf->cur_time_limit * (NUM_FILTER_ENTRIES-i))/NUM_FILTER_ENTRIES; + if (tim >= time_limit) { + /* + * This entry is expired, pull down + * the next one up. + */ + tf->entries[i].value = tf->entries[(i+1)].value; + tf->entries[i].time_up = tf->entries[(i+1)].time_up; + } + + } +} + +uint32_t +apply_filter_min(struct time_filter *tf, uint64_t value, uint32_t now) +{ + int i, j; + + if (value <= tf->entries[0].value) { + /* Zap them all */ + for(i=0; ientries[i].value = value; + tf->entries[i].time_up = now; + } + return (tf->entries[0].value); + } + for (j=1; jentries[j].value) { + for(i=j; ientries[i].value = value; + tf->entries[i].time_up = now; + } + break; + } + } + check_update_times(tf, value, now); + return (tf->entries[0].value); +} + +uint32_t +apply_filter_min_small(struct time_filter_small *tf, + uint32_t value, uint32_t now) +{ + int i, j; + + if (value <= tf->entries[0].value) { + /* Zap them all */ + for(i=0; ientries[i].value = value; + tf->entries[i].time_up = now; + } + return (tf->entries[0].value); + } + for (j=1; jentries[j].value) { + for(i=j; ientries[i].value = value; + tf->entries[i].time_up = now; + } + break; + } + } + check_update_times_small(tf, value, now); + return (tf->entries[0].value); +} + +uint32_t +apply_filter_max(struct time_filter *tf, uint64_t value, uint32_t now) +{ + int i, j; + + if (value >= tf->entries[0].value) { + /* Zap them all */ + for(i=0; ientries[i].value = value; + tf->entries[i].time_up = now; + } + return (tf->entries[0].value); + } + for (j=1; j= tf->entries[j].value) { + for(i=j; ientries[i].value = value; + tf->entries[i].time_up = now; + } + break; + } + } + check_update_times(tf, value, now); + return (tf->entries[0].value); +} + + +uint32_t +apply_filter_max_small(struct time_filter_small *tf, + uint32_t value, uint32_t now) +{ + int i, j; + + if (value >= tf->entries[0].value) { + /* Zap them all */ + for(i=0; ientries[i].value = value; + tf->entries[i].time_up = now; + } + return (tf->entries[0].value); + } + for (j=1; j= tf->entries[j].value) { + for(i=j; ientries[i].value = value; + tf->entries[i].time_up = now; + } + break; + } + } + check_update_times_small(tf, value, now); + return (tf->entries[0].value); +} Property changes on: head/sys/kern/subr_filter.c ___________________________________________________________________ Added: svn:eol-style ## -0,0 +1 ## +native \ No newline at end of property Added: svn:keywords ## -0,0 +1 ## +FreeBSD=%H \ No newline at end of property Added: svn:mime-type ## -0,0 +1 ## +text/plain \ No newline at end of property Index: head/sys/modules/tcp/Makefile =================================================================== --- head/sys/modules/tcp/Makefile (revision 352656) +++ head/sys/modules/tcp/Makefile (revision 352657) @@ -1,23 +1,25 @@ # # $FreeBSD$ # SYSDIR?=${SRCTOP}/sys .include "${SYSDIR}/conf/kern.opts.mk" SUBDIR= \ + ${_tcp_bbr} \ ${_tcp_rack} \ ${_tcpmd5} \ .if ${MK_EXTRA_TCP_STACKS} != "no" || defined(ALL_MODULES) +_tcp_bbr= bbr _tcp_rack= rack .endif .if (${MK_INET_SUPPORT} != "no" || ${MK_INET6_SUPPORT} != "no") || \ defined(ALL_MODULES) .if ${MK_IPSEC_SUPPORT} != "no" _tcpmd5= tcpmd5 .endif .endif .include Index: head/sys/modules/tcp/bbr/Makefile =================================================================== --- head/sys/modules/tcp/bbr/Makefile (nonexistent) +++ head/sys/modules/tcp/bbr/Makefile (revision 352657) @@ -0,0 +1,23 @@ +# +# $FreeBSD$ +# + +.PATH: ${.CURDIR}/../../../netinet/tcp_stacks + +STACKNAME= bbr +KMOD= tcp_${STACKNAME} +SRCS= bbr.c sack_filter.c rack_bbr_common.c + +SRCS+= opt_inet.h opt_inet6.h opt_ipsec.h +SRCS+= opt_tcpdebug.h +SRCS+= opt_kern_tls.h + +# +# Enable full debugging +# +#CFLAGS += -g + +CFLAGS+= -DMODNAME=${KMOD} +CFLAGS+= -DSTACKNAME=${STACKNAME} + +.include Property changes on: head/sys/modules/tcp/bbr/Makefile ___________________________________________________________________ Added: svn:eol-style ## -0,0 +1 ## +native \ No newline at end of property Added: svn:keywords ## -0,0 +1 ## +FreeBSD=%H \ No newline at end of property Added: svn:mime-type ## -0,0 +1 ## +text/plain \ No newline at end of property Index: head/sys/netinet/ip_output.c =================================================================== --- head/sys/netinet/ip_output.c (revision 352656) +++ head/sys/netinet/ip_output.c (revision 352657) @@ -1,1578 +1,1579 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 1988, 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)ip_output.c 8.3 (Berkeley) 1/21/94 */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_ipsec.h" #include "opt_kern_tls.h" #include "opt_mbuf_stress_test.h" #include "opt_mpath.h" #include "opt_ratelimit.h" #include "opt_route.h" #include "opt_rss.h" #include "opt_sctp.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef RADIX_MPATH #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef SCTP #include #include #endif #include #include #include #ifdef MBUF_STRESS_TEST static int mbuf_frag_size = 0; SYSCTL_INT(_net_inet_ip, OID_AUTO, mbuf_frag_size, CTLFLAG_RW, &mbuf_frag_size, 0, "Fragment outgoing mbufs to this size"); #endif static void ip_mloopback(struct ifnet *, const struct mbuf *, int); extern int in_mcast_loop; extern struct protosw inetsw[]; static inline int ip_output_pfil(struct mbuf **mp, struct ifnet *ifp, int flags, struct inpcb *inp, struct sockaddr_in *dst, int *fibnum, int *error) { struct m_tag *fwd_tag = NULL; struct mbuf *m; struct in_addr odst; struct ip *ip; int pflags = PFIL_OUT; if (flags & IP_FORWARDING) pflags |= PFIL_FWD; m = *mp; ip = mtod(m, struct ip *); /* Run through list of hooks for output packets. */ odst.s_addr = ip->ip_dst.s_addr; switch (pfil_run_hooks(V_inet_pfil_head, mp, ifp, pflags, inp)) { case PFIL_DROPPED: *error = EPERM; /* FALLTHROUGH */ case PFIL_CONSUMED: return 1; /* Finished */ case PFIL_PASS: *error = 0; } m = *mp; ip = mtod(m, struct ip *); /* See if destination IP address was changed by packet filter. */ if (odst.s_addr != ip->ip_dst.s_addr) { m->m_flags |= M_SKIP_FIREWALL; /* If destination is now ourself drop to ip_input(). */ if (in_localip(ip->ip_dst)) { m->m_flags |= M_FASTFWD_OURS; if (m->m_pkthdr.rcvif == NULL) m->m_pkthdr.rcvif = V_loif; if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) { m->m_pkthdr.csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR; m->m_pkthdr.csum_data = 0xffff; } m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED | CSUM_IP_VALID; #ifdef SCTP if (m->m_pkthdr.csum_flags & CSUM_SCTP) m->m_pkthdr.csum_flags |= CSUM_SCTP_VALID; #endif *error = netisr_queue(NETISR_IP, m); return 1; /* Finished */ } bzero(dst, sizeof(*dst)); dst->sin_family = AF_INET; dst->sin_len = sizeof(*dst); dst->sin_addr = ip->ip_dst; return -1; /* Reloop */ } /* See if fib was changed by packet filter. */ if ((*fibnum) != M_GETFIB(m)) { m->m_flags |= M_SKIP_FIREWALL; *fibnum = M_GETFIB(m); return -1; /* Reloop for FIB change */ } /* See if local, if yes, send it to netisr with IP_FASTFWD_OURS. */ if (m->m_flags & M_FASTFWD_OURS) { if (m->m_pkthdr.rcvif == NULL) m->m_pkthdr.rcvif = V_loif; if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) { m->m_pkthdr.csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR; m->m_pkthdr.csum_data = 0xffff; } #ifdef SCTP if (m->m_pkthdr.csum_flags & CSUM_SCTP) m->m_pkthdr.csum_flags |= CSUM_SCTP_VALID; #endif m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED | CSUM_IP_VALID; *error = netisr_queue(NETISR_IP, m); return 1; /* Finished */ } /* Or forward to some other address? */ if ((m->m_flags & M_IP_NEXTHOP) && ((fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL)) { bcopy((fwd_tag+1), dst, sizeof(struct sockaddr_in)); m->m_flags |= M_SKIP_FIREWALL; m->m_flags &= ~M_IP_NEXTHOP; m_tag_delete(m, fwd_tag); return -1; /* Reloop for CHANGE of dst */ } return 0; } static int ip_output_send(struct inpcb *inp, struct ifnet *ifp, struct mbuf *m, - const struct sockaddr_in *gw, struct route *ro) + const struct sockaddr_in *gw, struct route *ro, bool stamp_tag) { #ifdef KERN_TLS struct ktls_session *tls = NULL; #endif struct m_snd_tag *mst; int error; MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0); mst = NULL; #ifdef KERN_TLS /* * If this is an unencrypted TLS record, save a reference to * the record. This local reference is used to call * ktls_output_eagain after the mbuf has been freed (thus * dropping the mbuf's reference) in if_output. */ if (m->m_next != NULL && mbuf_has_tls_session(m->m_next)) { tls = ktls_hold(m->m_next->m_ext.ext_pgs->tls); mst = tls->snd_tag; /* * If a TLS session doesn't have a valid tag, it must * have had an earlier ifp mismatch, so drop this * packet. */ if (mst == NULL) { error = EAGAIN; goto done; } } #endif #ifdef RATELIMIT if (inp != NULL && mst == NULL) { if ((inp->inp_flags2 & INP_RATE_LIMIT_CHANGED) != 0 || (inp->inp_snd_tag != NULL && inp->inp_snd_tag->ifp != ifp)) in_pcboutput_txrtlmt(inp, ifp, m); if (inp->inp_snd_tag != NULL) mst = inp->inp_snd_tag; } #endif - if (mst != NULL) { + if (stamp_tag && mst != NULL) { KASSERT(m->m_pkthdr.rcvif == NULL, ("trying to add a send tag to a forwarded packet")); if (mst->ifp != ifp) { error = EAGAIN; goto done; } /* stamp send tag on mbuf */ m->m_pkthdr.snd_tag = m_snd_tag_ref(mst); m->m_pkthdr.csum_flags |= CSUM_SND_TAG; } error = (*ifp->if_output)(ifp, m, (const struct sockaddr *)gw, ro); done: /* Check for route change invalidating send tags. */ #ifdef KERN_TLS if (tls != NULL) { if (error == EAGAIN) error = ktls_output_eagain(inp, tls); ktls_free(tls); } #endif #ifdef RATELIMIT if (error == EAGAIN) in_pcboutput_eagain(inp); #endif return (error); } /* * IP output. The packet in mbuf chain m contains a skeletal IP * header (with len, off, ttl, proto, tos, src, dst). * The mbuf chain containing the packet will be freed. * The mbuf opt, if present, will not be freed. * If route ro is present and has ro_rt initialized, route lookup would be * skipped and ro->ro_rt would be used. If ro is present but ro->ro_rt is NULL, * then result of route lookup is stored in ro->ro_rt. * * In the IP forwarding case, the packet will arrive with options already * inserted, so must have a NULL opt pointer. */ int ip_output(struct mbuf *m, struct mbuf *opt, struct route *ro, int flags, struct ip_moptions *imo, struct inpcb *inp) { struct rm_priotracker in_ifa_tracker; struct epoch_tracker et; struct ip *ip; struct ifnet *ifp = NULL; /* keep compiler happy */ struct mbuf *m0; int hlen = sizeof (struct ip); int mtu; int error = 0; struct sockaddr_in *dst, sin; const struct sockaddr_in *gw; struct in_ifaddr *ia; struct in_addr src; int isbroadcast; uint16_t ip_len, ip_off; uint32_t fibnum; #if defined(IPSEC) || defined(IPSEC_SUPPORT) int no_route_but_check_spd = 0; #endif M_ASSERTPKTHDR(m); if (inp != NULL) { INP_LOCK_ASSERT(inp); M_SETFIB(m, inp->inp_inc.inc_fibnum); if ((flags & IP_NODEFAULTFLOWID) == 0) { m->m_pkthdr.flowid = inp->inp_flowid; M_HASHTYPE_SET(m, inp->inp_flowtype); } #ifdef NUMA m->m_pkthdr.numa_domain = inp->inp_numa_domain; #endif } if (opt) { int len = 0; m = ip_insertoptions(m, opt, &len); if (len != 0) hlen = len; /* ip->ip_hl is updated above */ } ip = mtod(m, struct ip *); ip_len = ntohs(ip->ip_len); ip_off = ntohs(ip->ip_off); if ((flags & (IP_FORWARDING|IP_RAWOUTPUT)) == 0) { ip->ip_v = IPVERSION; ip->ip_hl = hlen >> 2; ip_fillid(ip); } else { /* Header already set, fetch hlen from there */ hlen = ip->ip_hl << 2; } if ((flags & IP_FORWARDING) == 0) IPSTAT_INC(ips_localout); /* * dst/gw handling: * * gw is readonly but can point either to dst OR rt_gateway, * therefore we need restore gw if we're redoing lookup. */ fibnum = (inp != NULL) ? inp->inp_inc.inc_fibnum : M_GETFIB(m); if (ro != NULL) dst = (struct sockaddr_in *)&ro->ro_dst; else dst = &sin; if (ro == NULL || ro->ro_rt == NULL) { bzero(dst, sizeof(*dst)); dst->sin_family = AF_INET; dst->sin_len = sizeof(*dst); dst->sin_addr = ip->ip_dst; } gw = dst; NET_EPOCH_ENTER(et); again: /* * Validate route against routing table additions; * a better/more specific route might have been added. */ if (inp != NULL && ro != NULL && ro->ro_rt != NULL) RT_VALIDATE(ro, &inp->inp_rt_cookie, fibnum); /* * If there is a cached route, * check that it is to the same destination * and is still up. If not, free it and try again. * The address family should also be checked in case of sharing the * cache with IPv6. * Also check whether routing cache needs invalidation. */ if (ro != NULL && ro->ro_rt != NULL && ((ro->ro_rt->rt_flags & RTF_UP) == 0 || ro->ro_rt->rt_ifp == NULL || !RT_LINK_IS_UP(ro->ro_rt->rt_ifp) || dst->sin_family != AF_INET || dst->sin_addr.s_addr != ip->ip_dst.s_addr)) RO_INVALIDATE_CACHE(ro); ia = NULL; /* * If routing to interface only, short circuit routing lookup. * The use of an all-ones broadcast address implies this; an * interface is specified by the broadcast address of an interface, * or the destination address of a ptp interface. */ if (flags & IP_SENDONES) { if ((ia = ifatoia(ifa_ifwithbroadaddr(sintosa(dst), M_GETFIB(m)))) == NULL && (ia = ifatoia(ifa_ifwithdstaddr(sintosa(dst), M_GETFIB(m)))) == NULL) { IPSTAT_INC(ips_noroute); error = ENETUNREACH; goto bad; } ip->ip_dst.s_addr = INADDR_BROADCAST; dst->sin_addr = ip->ip_dst; ifp = ia->ia_ifp; mtu = ifp->if_mtu; ip->ip_ttl = 1; isbroadcast = 1; src = IA_SIN(ia)->sin_addr; } else if (flags & IP_ROUTETOIF) { if ((ia = ifatoia(ifa_ifwithdstaddr(sintosa(dst), M_GETFIB(m)))) == NULL && (ia = ifatoia(ifa_ifwithnet(sintosa(dst), 0, M_GETFIB(m)))) == NULL) { IPSTAT_INC(ips_noroute); error = ENETUNREACH; goto bad; } ifp = ia->ia_ifp; mtu = ifp->if_mtu; ip->ip_ttl = 1; isbroadcast = ifp->if_flags & IFF_BROADCAST ? in_ifaddr_broadcast(dst->sin_addr, ia) : 0; src = IA_SIN(ia)->sin_addr; } else if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) && imo != NULL && imo->imo_multicast_ifp != NULL) { /* * Bypass the normal routing lookup for multicast * packets if the interface is specified. */ ifp = imo->imo_multicast_ifp; mtu = ifp->if_mtu; IFP_TO_IA(ifp, ia, &in_ifa_tracker); isbroadcast = 0; /* fool gcc */ /* Interface may have no addresses. */ if (ia != NULL) src = IA_SIN(ia)->sin_addr; else src.s_addr = INADDR_ANY; } else if (ro != NULL) { if (ro->ro_rt == NULL) { /* * We want to do any cloning requested by the link * layer, as this is probably required in all cases * for correct operation (as it is for ARP). */ #ifdef RADIX_MPATH rtalloc_mpath_fib(ro, ntohl(ip->ip_src.s_addr ^ ip->ip_dst.s_addr), fibnum); #else in_rtalloc_ign(ro, 0, fibnum); #endif if (ro->ro_rt == NULL || (ro->ro_rt->rt_flags & RTF_UP) == 0 || ro->ro_rt->rt_ifp == NULL || !RT_LINK_IS_UP(ro->ro_rt->rt_ifp)) { #if defined(IPSEC) || defined(IPSEC_SUPPORT) /* * There is no route for this packet, but it is * possible that a matching SPD entry exists. */ no_route_but_check_spd = 1; mtu = 0; /* Silence GCC warning. */ goto sendit; #endif IPSTAT_INC(ips_noroute); error = EHOSTUNREACH; goto bad; } } ia = ifatoia(ro->ro_rt->rt_ifa); ifp = ro->ro_rt->rt_ifp; counter_u64_add(ro->ro_rt->rt_pksent, 1); rt_update_ro_flags(ro); if (ro->ro_rt->rt_flags & RTF_GATEWAY) gw = (struct sockaddr_in *)ro->ro_rt->rt_gateway; if (ro->ro_rt->rt_flags & RTF_HOST) isbroadcast = (ro->ro_rt->rt_flags & RTF_BROADCAST); else if (ifp->if_flags & IFF_BROADCAST) isbroadcast = in_ifaddr_broadcast(gw->sin_addr, ia); else isbroadcast = 0; if (ro->ro_rt->rt_flags & RTF_HOST) mtu = ro->ro_rt->rt_mtu; else mtu = ifp->if_mtu; src = IA_SIN(ia)->sin_addr; } else { struct nhop4_extended nh; bzero(&nh, sizeof(nh)); if (fib4_lookup_nh_ext(M_GETFIB(m), ip->ip_dst, 0, 0, &nh) != 0) { #if defined(IPSEC) || defined(IPSEC_SUPPORT) /* * There is no route for this packet, but it is * possible that a matching SPD entry exists. */ no_route_but_check_spd = 1; mtu = 0; /* Silence GCC warning. */ goto sendit; #endif IPSTAT_INC(ips_noroute); error = EHOSTUNREACH; goto bad; } ifp = nh.nh_ifp; mtu = nh.nh_mtu; /* * We are rewriting here dst to be gw actually, contradicting * comment at the beginning of the function. However, in this * case we are always dealing with on stack dst. * In case if pfil(9) sends us back to beginning of the * function, the dst would be rewritten by ip_output_pfil(). */ MPASS(dst == &sin); dst->sin_addr = nh.nh_addr; ia = nh.nh_ia; src = nh.nh_src; isbroadcast = (((nh.nh_flags & (NHF_HOST | NHF_BROADCAST)) == (NHF_HOST | NHF_BROADCAST)) || ((ifp->if_flags & IFF_BROADCAST) && in_ifaddr_broadcast(dst->sin_addr, ia))); } /* Catch a possible divide by zero later. */ KASSERT(mtu > 0, ("%s: mtu %d <= 0, ro=%p (rt_flags=0x%08x) ifp=%p", __func__, mtu, ro, (ro != NULL && ro->ro_rt != NULL) ? ro->ro_rt->rt_flags : 0, ifp)); if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) { m->m_flags |= M_MCAST; /* * IP destination address is multicast. Make sure "gw" * still points to the address in "ro". (It may have been * changed to point to a gateway address, above.) */ gw = dst; /* * See if the caller provided any multicast options */ if (imo != NULL) { ip->ip_ttl = imo->imo_multicast_ttl; if (imo->imo_multicast_vif != -1) ip->ip_src.s_addr = ip_mcast_src ? ip_mcast_src(imo->imo_multicast_vif) : INADDR_ANY; } else ip->ip_ttl = IP_DEFAULT_MULTICAST_TTL; /* * Confirm that the outgoing interface supports multicast. */ if ((imo == NULL) || (imo->imo_multicast_vif == -1)) { if ((ifp->if_flags & IFF_MULTICAST) == 0) { IPSTAT_INC(ips_noroute); error = ENETUNREACH; goto bad; } } /* * If source address not specified yet, use address * of outgoing interface. */ if (ip->ip_src.s_addr == INADDR_ANY) ip->ip_src = src; if ((imo == NULL && in_mcast_loop) || (imo && imo->imo_multicast_loop)) { /* * Loop back multicast datagram if not expressly * forbidden to do so, even if we are not a member * of the group; ip_input() will filter it later, * thus deferring a hash lookup and mutex acquisition * at the expense of a cheap copy using m_copym(). */ ip_mloopback(ifp, m, hlen); } else { /* * If we are acting as a multicast router, perform * multicast forwarding as if the packet had just * arrived on the interface to which we are about * to send. The multicast forwarding function * recursively calls this function, using the * IP_FORWARDING flag to prevent infinite recursion. * * Multicasts that are looped back by ip_mloopback(), * above, will be forwarded by the ip_input() routine, * if necessary. */ if (V_ip_mrouter && (flags & IP_FORWARDING) == 0) { /* * If rsvp daemon is not running, do not * set ip_moptions. This ensures that the packet * is multicast and not just sent down one link * as prescribed by rsvpd. */ if (!V_rsvp_on) imo = NULL; if (ip_mforward && ip_mforward(ip, ifp, m, imo) != 0) { m_freem(m); goto done; } } } /* * Multicasts with a time-to-live of zero may be looped- * back, above, but must not be transmitted on a network. * Also, multicasts addressed to the loopback interface * are not sent -- the above call to ip_mloopback() will * loop back a copy. ip_input() will drop the copy if * this host does not belong to the destination group on * the loopback interface. */ if (ip->ip_ttl == 0 || ifp->if_flags & IFF_LOOPBACK) { m_freem(m); goto done; } goto sendit; } /* * If the source address is not specified yet, use the address * of the outoing interface. */ if (ip->ip_src.s_addr == INADDR_ANY) ip->ip_src = src; /* * Look for broadcast address and * verify user is allowed to send * such a packet. */ if (isbroadcast) { if ((ifp->if_flags & IFF_BROADCAST) == 0) { error = EADDRNOTAVAIL; goto bad; } if ((flags & IP_ALLOWBROADCAST) == 0) { error = EACCES; goto bad; } /* don't allow broadcast messages to be fragmented */ if (ip_len > mtu) { error = EMSGSIZE; goto bad; } m->m_flags |= M_BCAST; } else { m->m_flags &= ~M_BCAST; } sendit: #if defined(IPSEC) || defined(IPSEC_SUPPORT) if (IPSEC_ENABLED(ipv4)) { if ((error = IPSEC_OUTPUT(ipv4, m, inp)) != 0) { if (error == EINPROGRESS) error = 0; goto done; } } /* * Check if there was a route for this packet; return error if not. */ if (no_route_but_check_spd) { IPSTAT_INC(ips_noroute); error = EHOSTUNREACH; goto bad; } /* Update variables that are affected by ipsec4_output(). */ ip = mtod(m, struct ip *); hlen = ip->ip_hl << 2; #endif /* IPSEC */ /* Jump over all PFIL processing if hooks are not active. */ if (PFIL_HOOKED_OUT(V_inet_pfil_head)) { switch (ip_output_pfil(&m, ifp, flags, inp, dst, &fibnum, &error)) { case 1: /* Finished */ goto done; case 0: /* Continue normally */ ip = mtod(m, struct ip *); break; case -1: /* Need to try again */ /* Reset everything for a new round */ if (ro != NULL) { RO_RTFREE(ro); ro->ro_prepend = NULL; } gw = dst; ip = mtod(m, struct ip *); goto again; } } /* IN_LOOPBACK must not appear on the wire - RFC1122. */ if (IN_LOOPBACK(ntohl(ip->ip_dst.s_addr)) || IN_LOOPBACK(ntohl(ip->ip_src.s_addr))) { if ((ifp->if_flags & IFF_LOOPBACK) == 0) { IPSTAT_INC(ips_badaddr); error = EADDRNOTAVAIL; goto bad; } } m->m_pkthdr.csum_flags |= CSUM_IP; if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA & ~ifp->if_hwassist) { m = mb_unmapped_to_ext(m); if (m == NULL) { IPSTAT_INC(ips_odropped); error = ENOBUFS; goto bad; } in_delayed_cksum(m); m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA; } else if ((ifp->if_capenable & IFCAP_NOMAP) == 0) { m = mb_unmapped_to_ext(m); if (m == NULL) { IPSTAT_INC(ips_odropped); error = ENOBUFS; goto bad; } } #ifdef SCTP if (m->m_pkthdr.csum_flags & CSUM_SCTP & ~ifp->if_hwassist) { m = mb_unmapped_to_ext(m); if (m == NULL) { IPSTAT_INC(ips_odropped); error = ENOBUFS; goto bad; } sctp_delayed_cksum(m, (uint32_t)(ip->ip_hl << 2)); m->m_pkthdr.csum_flags &= ~CSUM_SCTP; } #endif /* * If small enough for interface, or the interface will take * care of the fragmentation for us, we can just send directly. */ if (ip_len <= mtu || (m->m_pkthdr.csum_flags & ifp->if_hwassist & CSUM_TSO) != 0) { ip->ip_sum = 0; if (m->m_pkthdr.csum_flags & CSUM_IP & ~ifp->if_hwassist) { ip->ip_sum = in_cksum(m, hlen); m->m_pkthdr.csum_flags &= ~CSUM_IP; } /* * Record statistics for this interface address. * With CSUM_TSO the byte/packet count will be slightly * incorrect because we count the IP+TCP headers only * once instead of for every generated packet. */ if (!(flags & IP_FORWARDING) && ia) { if (m->m_pkthdr.csum_flags & CSUM_TSO) counter_u64_add(ia->ia_ifa.ifa_opackets, m->m_pkthdr.len / m->m_pkthdr.tso_segsz); else counter_u64_add(ia->ia_ifa.ifa_opackets, 1); counter_u64_add(ia->ia_ifa.ifa_obytes, m->m_pkthdr.len); } #ifdef MBUF_STRESS_TEST if (mbuf_frag_size && m->m_pkthdr.len > mbuf_frag_size) m = m_fragment(m, M_NOWAIT, mbuf_frag_size); #endif /* * Reset layer specific mbuf flags * to avoid confusing lower layers. */ m_clrprotoflags(m); IP_PROBE(send, NULL, NULL, ip, ifp, ip, NULL); - error = ip_output_send(inp, ifp, m, gw, ro); + error = ip_output_send(inp, ifp, m, gw, ro, + (flags & IP_NO_SND_TAG_RL) ? false : true); goto done; } /* Balk when DF bit is set or the interface didn't support TSO. */ if ((ip_off & IP_DF) || (m->m_pkthdr.csum_flags & CSUM_TSO)) { error = EMSGSIZE; IPSTAT_INC(ips_cantfrag); goto bad; } /* * Too large for interface; fragment if possible. If successful, * on return, m will point to a list of packets to be sent. */ error = ip_fragment(ip, &m, mtu, ifp->if_hwassist); if (error) goto bad; for (; m; m = m0) { m0 = m->m_nextpkt; m->m_nextpkt = 0; if (error == 0) { /* Record statistics for this interface address. */ if (ia != NULL) { counter_u64_add(ia->ia_ifa.ifa_opackets, 1); counter_u64_add(ia->ia_ifa.ifa_obytes, m->m_pkthdr.len); } /* * Reset layer specific mbuf flags * to avoid confusing upper layers. */ m_clrprotoflags(m); IP_PROBE(send, NULL, NULL, mtod(m, struct ip *), ifp, mtod(m, struct ip *), NULL); - error = ip_output_send(inp, ifp, m, gw, ro); + error = ip_output_send(inp, ifp, m, gw, ro, true); } else m_freem(m); } if (error == 0) IPSTAT_INC(ips_fragmented); done: NET_EPOCH_EXIT(et); return (error); bad: m_freem(m); goto done; } /* * Create a chain of fragments which fit the given mtu. m_frag points to the * mbuf to be fragmented; on return it points to the chain with the fragments. * Return 0 if no error. If error, m_frag may contain a partially built * chain of fragments that should be freed by the caller. * * if_hwassist_flags is the hw offload capabilities (see if_data.ifi_hwassist) */ int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, u_long if_hwassist_flags) { int error = 0; int hlen = ip->ip_hl << 2; int len = (mtu - hlen) & ~7; /* size of payload in each fragment */ int off; struct mbuf *m0 = *m_frag; /* the original packet */ int firstlen; struct mbuf **mnext; int nfrags; uint16_t ip_len, ip_off; ip_len = ntohs(ip->ip_len); ip_off = ntohs(ip->ip_off); if (ip_off & IP_DF) { /* Fragmentation not allowed */ IPSTAT_INC(ips_cantfrag); return EMSGSIZE; } /* * Must be able to put at least 8 bytes per fragment. */ if (len < 8) return EMSGSIZE; /* * If the interface will not calculate checksums on * fragmented packets, then do it here. */ if (m0->m_pkthdr.csum_flags & CSUM_DELAY_DATA) { m0 = mb_unmapped_to_ext(m0); if (m0 == NULL) { error = ENOBUFS; IPSTAT_INC(ips_odropped); goto done; } in_delayed_cksum(m0); m0->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA; } #ifdef SCTP if (m0->m_pkthdr.csum_flags & CSUM_SCTP) { m0 = mb_unmapped_to_ext(m0); if (m0 == NULL) { error = ENOBUFS; IPSTAT_INC(ips_odropped); goto done; } sctp_delayed_cksum(m0, hlen); m0->m_pkthdr.csum_flags &= ~CSUM_SCTP; } #endif if (len > PAGE_SIZE) { /* * Fragment large datagrams such that each segment * contains a multiple of PAGE_SIZE amount of data, * plus headers. This enables a receiver to perform * page-flipping zero-copy optimizations. * * XXX When does this help given that sender and receiver * could have different page sizes, and also mtu could * be less than the receiver's page size ? */ int newlen; off = MIN(mtu, m0->m_pkthdr.len); /* * firstlen (off - hlen) must be aligned on an * 8-byte boundary */ if (off < hlen) goto smart_frag_failure; off = ((off - hlen) & ~7) + hlen; newlen = (~PAGE_MASK) & mtu; if ((newlen + sizeof (struct ip)) > mtu) { /* we failed, go back the default */ smart_frag_failure: newlen = len; off = hlen + len; } len = newlen; } else { off = hlen + len; } firstlen = off - hlen; mnext = &m0->m_nextpkt; /* pointer to next packet */ /* * Loop through length of segment after first fragment, * make new header and copy data of each part and link onto chain. * Here, m0 is the original packet, m is the fragment being created. * The fragments are linked off the m_nextpkt of the original * packet, which after processing serves as the first fragment. */ for (nfrags = 1; off < ip_len; off += len, nfrags++) { struct ip *mhip; /* ip header on the fragment */ struct mbuf *m; int mhlen = sizeof (struct ip); m = m_gethdr(M_NOWAIT, MT_DATA); if (m == NULL) { error = ENOBUFS; IPSTAT_INC(ips_odropped); goto done; } /* * Make sure the complete packet header gets copied * from the originating mbuf to the newly created * mbuf. This also ensures that existing firewall * classification(s), VLAN tags and so on get copied * to the resulting fragmented packet(s): */ if (m_dup_pkthdr(m, m0, M_NOWAIT) == 0) { m_free(m); error = ENOBUFS; IPSTAT_INC(ips_odropped); goto done; } /* * In the first mbuf, leave room for the link header, then * copy the original IP header including options. The payload * goes into an additional mbuf chain returned by m_copym(). */ m->m_data += max_linkhdr; mhip = mtod(m, struct ip *); *mhip = *ip; if (hlen > sizeof (struct ip)) { mhlen = ip_optcopy(ip, mhip) + sizeof (struct ip); mhip->ip_v = IPVERSION; mhip->ip_hl = mhlen >> 2; } m->m_len = mhlen; /* XXX do we need to add ip_off below ? */ mhip->ip_off = ((off - hlen) >> 3) + ip_off; if (off + len >= ip_len) len = ip_len - off; else mhip->ip_off |= IP_MF; mhip->ip_len = htons((u_short)(len + mhlen)); m->m_next = m_copym(m0, off, len, M_NOWAIT); if (m->m_next == NULL) { /* copy failed */ m_free(m); error = ENOBUFS; /* ??? */ IPSTAT_INC(ips_odropped); goto done; } m->m_pkthdr.len = mhlen + len; #ifdef MAC mac_netinet_fragment(m0, m); #endif mhip->ip_off = htons(mhip->ip_off); mhip->ip_sum = 0; if (m->m_pkthdr.csum_flags & CSUM_IP & ~if_hwassist_flags) { mhip->ip_sum = in_cksum(m, mhlen); m->m_pkthdr.csum_flags &= ~CSUM_IP; } *mnext = m; mnext = &m->m_nextpkt; } IPSTAT_ADD(ips_ofragments, nfrags); /* * Update first fragment by trimming what's been copied out * and updating header. */ m_adj(m0, hlen + firstlen - ip_len); m0->m_pkthdr.len = hlen + firstlen; ip->ip_len = htons((u_short)m0->m_pkthdr.len); ip->ip_off = htons(ip_off | IP_MF); ip->ip_sum = 0; if (m0->m_pkthdr.csum_flags & CSUM_IP & ~if_hwassist_flags) { ip->ip_sum = in_cksum(m0, hlen); m0->m_pkthdr.csum_flags &= ~CSUM_IP; } done: *m_frag = m0; return error; } void in_delayed_cksum(struct mbuf *m) { struct ip *ip; struct udphdr *uh; uint16_t cklen, csum, offset; ip = mtod(m, struct ip *); offset = ip->ip_hl << 2 ; if (m->m_pkthdr.csum_flags & CSUM_UDP) { /* if udp header is not in the first mbuf copy udplen */ if (offset + sizeof(struct udphdr) > m->m_len) { m_copydata(m, offset + offsetof(struct udphdr, uh_ulen), sizeof(cklen), (caddr_t)&cklen); cklen = ntohs(cklen); } else { uh = (struct udphdr *)mtodo(m, offset); cklen = ntohs(uh->uh_ulen); } csum = in_cksum_skip(m, cklen + offset, offset); if (csum == 0) csum = 0xffff; } else { cklen = ntohs(ip->ip_len); csum = in_cksum_skip(m, cklen, offset); } offset += m->m_pkthdr.csum_data; /* checksum offset */ if (offset + sizeof(csum) > m->m_len) m_copyback(m, offset, sizeof(csum), (caddr_t)&csum); else *(u_short *)mtodo(m, offset) = csum; } /* * IP socket option processing. */ int ip_ctloutput(struct socket *so, struct sockopt *sopt) { struct inpcb *inp = sotoinpcb(so); int error, optval; #ifdef RSS uint32_t rss_bucket; int retval; #endif error = optval = 0; if (sopt->sopt_level != IPPROTO_IP) { error = EINVAL; if (sopt->sopt_level == SOL_SOCKET && sopt->sopt_dir == SOPT_SET) { switch (sopt->sopt_name) { case SO_REUSEADDR: INP_WLOCK(inp); if ((so->so_options & SO_REUSEADDR) != 0) inp->inp_flags2 |= INP_REUSEADDR; else inp->inp_flags2 &= ~INP_REUSEADDR; INP_WUNLOCK(inp); error = 0; break; case SO_REUSEPORT: INP_WLOCK(inp); if ((so->so_options & SO_REUSEPORT) != 0) inp->inp_flags2 |= INP_REUSEPORT; else inp->inp_flags2 &= ~INP_REUSEPORT; INP_WUNLOCK(inp); error = 0; break; case SO_REUSEPORT_LB: INP_WLOCK(inp); if ((so->so_options & SO_REUSEPORT_LB) != 0) inp->inp_flags2 |= INP_REUSEPORT_LB; else inp->inp_flags2 &= ~INP_REUSEPORT_LB; INP_WUNLOCK(inp); error = 0; break; case SO_SETFIB: INP_WLOCK(inp); inp->inp_inc.inc_fibnum = so->so_fibnum; INP_WUNLOCK(inp); error = 0; break; case SO_MAX_PACING_RATE: #ifdef RATELIMIT INP_WLOCK(inp); inp->inp_flags2 |= INP_RATE_LIMIT_CHANGED; INP_WUNLOCK(inp); error = 0; #else error = EOPNOTSUPP; #endif break; default: break; } } return (error); } switch (sopt->sopt_dir) { case SOPT_SET: switch (sopt->sopt_name) { case IP_OPTIONS: #ifdef notyet case IP_RETOPTS: #endif { struct mbuf *m; if (sopt->sopt_valsize > MLEN) { error = EMSGSIZE; break; } m = m_get(sopt->sopt_td ? M_WAITOK : M_NOWAIT, MT_DATA); if (m == NULL) { error = ENOBUFS; break; } m->m_len = sopt->sopt_valsize; error = sooptcopyin(sopt, mtod(m, char *), m->m_len, m->m_len); if (error) { m_free(m); break; } INP_WLOCK(inp); error = ip_pcbopts(inp, sopt->sopt_name, m); INP_WUNLOCK(inp); return (error); } case IP_BINDANY: if (sopt->sopt_td != NULL) { error = priv_check(sopt->sopt_td, PRIV_NETINET_BINDANY); if (error) break; } /* FALLTHROUGH */ case IP_BINDMULTI: #ifdef RSS case IP_RSS_LISTEN_BUCKET: #endif case IP_TOS: case IP_TTL: case IP_MINTTL: case IP_RECVOPTS: case IP_RECVRETOPTS: case IP_ORIGDSTADDR: case IP_RECVDSTADDR: case IP_RECVTTL: case IP_RECVIF: case IP_ONESBCAST: case IP_DONTFRAG: case IP_RECVTOS: case IP_RECVFLOWID: #ifdef RSS case IP_RECVRSSBUCKETID: #endif error = sooptcopyin(sopt, &optval, sizeof optval, sizeof optval); if (error) break; switch (sopt->sopt_name) { case IP_TOS: inp->inp_ip_tos = optval; break; case IP_TTL: inp->inp_ip_ttl = optval; break; case IP_MINTTL: if (optval >= 0 && optval <= MAXTTL) inp->inp_ip_minttl = optval; else error = EINVAL; break; #define OPTSET(bit) do { \ INP_WLOCK(inp); \ if (optval) \ inp->inp_flags |= bit; \ else \ inp->inp_flags &= ~bit; \ INP_WUNLOCK(inp); \ } while (0) #define OPTSET2(bit, val) do { \ INP_WLOCK(inp); \ if (val) \ inp->inp_flags2 |= bit; \ else \ inp->inp_flags2 &= ~bit; \ INP_WUNLOCK(inp); \ } while (0) case IP_RECVOPTS: OPTSET(INP_RECVOPTS); break; case IP_RECVRETOPTS: OPTSET(INP_RECVRETOPTS); break; case IP_RECVDSTADDR: OPTSET(INP_RECVDSTADDR); break; case IP_ORIGDSTADDR: OPTSET2(INP_ORIGDSTADDR, optval); break; case IP_RECVTTL: OPTSET(INP_RECVTTL); break; case IP_RECVIF: OPTSET(INP_RECVIF); break; case IP_ONESBCAST: OPTSET(INP_ONESBCAST); break; case IP_DONTFRAG: OPTSET(INP_DONTFRAG); break; case IP_BINDANY: OPTSET(INP_BINDANY); break; case IP_RECVTOS: OPTSET(INP_RECVTOS); break; case IP_BINDMULTI: OPTSET2(INP_BINDMULTI, optval); break; case IP_RECVFLOWID: OPTSET2(INP_RECVFLOWID, optval); break; #ifdef RSS case IP_RSS_LISTEN_BUCKET: if ((optval >= 0) && (optval < rss_getnumbuckets())) { inp->inp_rss_listen_bucket = optval; OPTSET2(INP_RSS_BUCKET_SET, 1); } else { error = EINVAL; } break; case IP_RECVRSSBUCKETID: OPTSET2(INP_RECVRSSBUCKETID, optval); break; #endif } break; #undef OPTSET #undef OPTSET2 /* * Multicast socket options are processed by the in_mcast * module. */ case IP_MULTICAST_IF: case IP_MULTICAST_VIF: case IP_MULTICAST_TTL: case IP_MULTICAST_LOOP: case IP_ADD_MEMBERSHIP: case IP_DROP_MEMBERSHIP: case IP_ADD_SOURCE_MEMBERSHIP: case IP_DROP_SOURCE_MEMBERSHIP: case IP_BLOCK_SOURCE: case IP_UNBLOCK_SOURCE: case IP_MSFILTER: case MCAST_JOIN_GROUP: case MCAST_LEAVE_GROUP: case MCAST_JOIN_SOURCE_GROUP: case MCAST_LEAVE_SOURCE_GROUP: case MCAST_BLOCK_SOURCE: case MCAST_UNBLOCK_SOURCE: error = inp_setmoptions(inp, sopt); break; case IP_PORTRANGE: error = sooptcopyin(sopt, &optval, sizeof optval, sizeof optval); if (error) break; INP_WLOCK(inp); switch (optval) { case IP_PORTRANGE_DEFAULT: inp->inp_flags &= ~(INP_LOWPORT); inp->inp_flags &= ~(INP_HIGHPORT); break; case IP_PORTRANGE_HIGH: inp->inp_flags &= ~(INP_LOWPORT); inp->inp_flags |= INP_HIGHPORT; break; case IP_PORTRANGE_LOW: inp->inp_flags &= ~(INP_HIGHPORT); inp->inp_flags |= INP_LOWPORT; break; default: error = EINVAL; break; } INP_WUNLOCK(inp); break; #if defined(IPSEC) || defined(IPSEC_SUPPORT) case IP_IPSEC_POLICY: if (IPSEC_ENABLED(ipv4)) { error = IPSEC_PCBCTL(ipv4, inp, sopt); break; } /* FALLTHROUGH */ #endif /* IPSEC */ default: error = ENOPROTOOPT; break; } break; case SOPT_GET: switch (sopt->sopt_name) { case IP_OPTIONS: case IP_RETOPTS: INP_RLOCK(inp); if (inp->inp_options) { struct mbuf *options; options = m_copym(inp->inp_options, 0, M_COPYALL, M_NOWAIT); INP_RUNLOCK(inp); if (options != NULL) { error = sooptcopyout(sopt, mtod(options, char *), options->m_len); m_freem(options); } else error = ENOMEM; } else { INP_RUNLOCK(inp); sopt->sopt_valsize = 0; } break; case IP_TOS: case IP_TTL: case IP_MINTTL: case IP_RECVOPTS: case IP_RECVRETOPTS: case IP_ORIGDSTADDR: case IP_RECVDSTADDR: case IP_RECVTTL: case IP_RECVIF: case IP_PORTRANGE: case IP_ONESBCAST: case IP_DONTFRAG: case IP_BINDANY: case IP_RECVTOS: case IP_BINDMULTI: case IP_FLOWID: case IP_FLOWTYPE: case IP_RECVFLOWID: #ifdef RSS case IP_RSSBUCKETID: case IP_RECVRSSBUCKETID: #endif switch (sopt->sopt_name) { case IP_TOS: optval = inp->inp_ip_tos; break; case IP_TTL: optval = inp->inp_ip_ttl; break; case IP_MINTTL: optval = inp->inp_ip_minttl; break; #define OPTBIT(bit) (inp->inp_flags & bit ? 1 : 0) #define OPTBIT2(bit) (inp->inp_flags2 & bit ? 1 : 0) case IP_RECVOPTS: optval = OPTBIT(INP_RECVOPTS); break; case IP_RECVRETOPTS: optval = OPTBIT(INP_RECVRETOPTS); break; case IP_RECVDSTADDR: optval = OPTBIT(INP_RECVDSTADDR); break; case IP_ORIGDSTADDR: optval = OPTBIT2(INP_ORIGDSTADDR); break; case IP_RECVTTL: optval = OPTBIT(INP_RECVTTL); break; case IP_RECVIF: optval = OPTBIT(INP_RECVIF); break; case IP_PORTRANGE: if (inp->inp_flags & INP_HIGHPORT) optval = IP_PORTRANGE_HIGH; else if (inp->inp_flags & INP_LOWPORT) optval = IP_PORTRANGE_LOW; else optval = 0; break; case IP_ONESBCAST: optval = OPTBIT(INP_ONESBCAST); break; case IP_DONTFRAG: optval = OPTBIT(INP_DONTFRAG); break; case IP_BINDANY: optval = OPTBIT(INP_BINDANY); break; case IP_RECVTOS: optval = OPTBIT(INP_RECVTOS); break; case IP_FLOWID: optval = inp->inp_flowid; break; case IP_FLOWTYPE: optval = inp->inp_flowtype; break; case IP_RECVFLOWID: optval = OPTBIT2(INP_RECVFLOWID); break; #ifdef RSS case IP_RSSBUCKETID: retval = rss_hash2bucket(inp->inp_flowid, inp->inp_flowtype, &rss_bucket); if (retval == 0) optval = rss_bucket; else error = EINVAL; break; case IP_RECVRSSBUCKETID: optval = OPTBIT2(INP_RECVRSSBUCKETID); break; #endif case IP_BINDMULTI: optval = OPTBIT2(INP_BINDMULTI); break; } error = sooptcopyout(sopt, &optval, sizeof optval); break; /* * Multicast socket options are processed by the in_mcast * module. */ case IP_MULTICAST_IF: case IP_MULTICAST_VIF: case IP_MULTICAST_TTL: case IP_MULTICAST_LOOP: case IP_MSFILTER: error = inp_getmoptions(inp, sopt); break; #if defined(IPSEC) || defined(IPSEC_SUPPORT) case IP_IPSEC_POLICY: if (IPSEC_ENABLED(ipv4)) { error = IPSEC_PCBCTL(ipv4, inp, sopt); break; } /* FALLTHROUGH */ #endif /* IPSEC */ default: error = ENOPROTOOPT; break; } break; } return (error); } /* * Routine called from ip_output() to loop back a copy of an IP multicast * packet to the input queue of a specified interface. Note that this * calls the output routine of the loopback "driver", but with an interface * pointer that might NOT be a loopback interface -- evil, but easier than * replicating that code here. */ static void ip_mloopback(struct ifnet *ifp, const struct mbuf *m, int hlen) { struct ip *ip; struct mbuf *copym; /* * Make a deep copy of the packet because we're going to * modify the pack in order to generate checksums. */ copym = m_dup(m, M_NOWAIT); if (copym != NULL && (!M_WRITABLE(copym) || copym->m_len < hlen)) copym = m_pullup(copym, hlen); if (copym != NULL) { /* If needed, compute the checksum and mark it as valid. */ if (copym->m_pkthdr.csum_flags & CSUM_DELAY_DATA) { in_delayed_cksum(copym); copym->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA; copym->m_pkthdr.csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR; copym->m_pkthdr.csum_data = 0xffff; } /* * We don't bother to fragment if the IP length is greater * than the interface's MTU. Can this possibly matter? */ ip = mtod(copym, struct ip *); ip->ip_sum = 0; ip->ip_sum = in_cksum(copym, hlen); if_simloop(ifp, copym, AF_INET, 0); } } Index: head/sys/netinet/ip_var.h =================================================================== --- head/sys/netinet/ip_var.h (revision 352656) +++ head/sys/netinet/ip_var.h (revision 352657) @@ -1,302 +1,303 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 * $FreeBSD$ */ #ifndef _NETINET_IP_VAR_H_ #define _NETINET_IP_VAR_H_ #include #include /* * Overlay for ip header used by other protocols (tcp, udp). */ struct ipovly { u_char ih_x1[9]; /* (unused) */ u_char ih_pr; /* protocol */ u_short ih_len; /* protocol length */ struct in_addr ih_src; /* source internet address */ struct in_addr ih_dst; /* destination internet address */ }; #ifdef _KERNEL /* * Ip reassembly queue structure. Each fragment * being reassembled is attached to one of these structures. * They are timed out after ipq_ttl drops to 0, and may also * be reclaimed if memory becomes tight. */ struct ipq { TAILQ_ENTRY(ipq) ipq_list; /* to other reass headers */ u_char ipq_ttl; /* time for reass q to live */ u_char ipq_p; /* protocol of this fragment */ u_short ipq_id; /* sequence id for reassembly */ int ipq_maxoff; /* total length of packet */ struct mbuf *ipq_frags; /* to ip headers of fragments */ struct in_addr ipq_src,ipq_dst; u_char ipq_nfrags; /* # frags in this packet */ struct label *ipq_label; /* MAC label */ }; #endif /* _KERNEL */ /* * Structure stored in mbuf in inpcb.ip_options * and passed to ip_output when ip options are in use. * The actual length of the options (including ipopt_dst) * is in m_len. */ #define MAX_IPOPTLEN 40 struct ipoption { struct in_addr ipopt_dst; /* first-hop dst if source routed */ char ipopt_list[MAX_IPOPTLEN]; /* options proper */ }; #if defined(_NETINET_IN_VAR_H_) && defined(_KERNEL) /* * Structure attached to inpcb.ip_moptions and * passed to ip_output when IP multicast options are in use. * This structure is lazy-allocated. */ struct ip_moptions { struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ struct in_addr imo_multicast_addr; /* ifindex/addr on MULTICAST_IF */ u_long imo_multicast_vif; /* vif num outgoing multicasts */ u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ u_char imo_multicast_loop; /* 1 => hear sends if a member */ struct ip_mfilter_head imo_head; /* group membership list */ }; #else struct ip_moptions; #endif struct ipstat { uint64_t ips_total; /* total packets received */ uint64_t ips_badsum; /* checksum bad */ uint64_t ips_tooshort; /* packet too short */ uint64_t ips_toosmall; /* not enough data */ uint64_t ips_badhlen; /* ip header length < data size */ uint64_t ips_badlen; /* ip length < ip header length */ uint64_t ips_fragments; /* fragments received */ uint64_t ips_fragdropped; /* frags dropped (dups, out of space) */ uint64_t ips_fragtimeout; /* fragments timed out */ uint64_t ips_forward; /* packets forwarded */ uint64_t ips_fastforward; /* packets fast forwarded */ uint64_t ips_cantforward; /* packets rcvd for unreachable dest */ uint64_t ips_redirectsent; /* packets forwarded on same net */ uint64_t ips_noproto; /* unknown or unsupported protocol */ uint64_t ips_delivered; /* datagrams delivered to upper level*/ uint64_t ips_localout; /* total ip packets generated here */ uint64_t ips_odropped; /* lost packets due to nobufs, etc. */ uint64_t ips_reassembled; /* total packets reassembled ok */ uint64_t ips_fragmented; /* datagrams successfully fragmented */ uint64_t ips_ofragments; /* output fragments created */ uint64_t ips_cantfrag; /* don't fragment flag was set, etc. */ uint64_t ips_badoptions; /* error in option processing */ uint64_t ips_noroute; /* packets discarded due to no route */ uint64_t ips_badvers; /* ip version != 4 */ uint64_t ips_rawout; /* total raw ip packets generated */ uint64_t ips_toolong; /* ip length > max ip packet size */ uint64_t ips_notmember; /* multicasts for unregistered grps */ uint64_t ips_nogif; /* no match gif found */ uint64_t ips_badaddr; /* invalid address on header */ }; #ifdef _KERNEL #include #include VNET_PCPUSTAT_DECLARE(struct ipstat, ipstat); /* * In-kernel consumers can use these accessor macros directly to update * stats. */ #define IPSTAT_ADD(name, val) \ VNET_PCPUSTAT_ADD(struct ipstat, ipstat, name, (val)) #define IPSTAT_SUB(name, val) IPSTAT_ADD(name, -(val)) #define IPSTAT_INC(name) IPSTAT_ADD(name, 1) #define IPSTAT_DEC(name) IPSTAT_SUB(name, 1) /* * Kernel module consumers must use this accessor macro. */ void kmod_ipstat_inc(int statnum); #define KMOD_IPSTAT_INC(name) \ kmod_ipstat_inc(offsetof(struct ipstat, name) / sizeof(uint64_t)) void kmod_ipstat_dec(int statnum); #define KMOD_IPSTAT_DEC(name) \ kmod_ipstat_dec(offsetof(struct ipstat, name) / sizeof(uint64_t)) /* flags passed to ip_output as last parameter */ #define IP_FORWARDING 0x1 /* most of ip header exists */ #define IP_RAWOUTPUT 0x2 /* raw ip header exists */ #define IP_SENDONES 0x4 /* send all-ones broadcast */ #define IP_SENDTOIF 0x8 /* send on specific ifnet */ #define IP_ROUTETOIF SO_DONTROUTE /* 0x10 bypass routing tables */ #define IP_ALLOWBROADCAST SO_BROADCAST /* 0x20 can send broadcast packets */ #define IP_NODEFAULTFLOWID 0x40 /* Don't set the flowid from inp */ +#define IP_NO_SND_TAG_RL 0x80 /* Don't send down the ratelimit tag */ #ifdef __NO_STRICT_ALIGNMENT #define IP_HDR_ALIGNED_P(ip) 1 #else #define IP_HDR_ALIGNED_P(ip) ((((intptr_t) (ip)) & 3) == 0) #endif struct ip; struct inpcb; struct route; struct sockopt; struct inpcbinfo; VNET_DECLARE(int, ip_defttl); /* default IP ttl */ VNET_DECLARE(int, ipforwarding); /* ip forwarding */ #ifdef IPSTEALTH VNET_DECLARE(int, ipstealth); /* stealth forwarding */ #endif extern u_char ip_protox[]; VNET_DECLARE(struct socket *, ip_rsvpd); /* reservation protocol daemon*/ VNET_DECLARE(struct socket *, ip_mrouter); /* multicast routing daemon */ extern int (*legal_vif_num)(int); extern u_long (*ip_mcast_src)(int); VNET_DECLARE(int, rsvp_on); VNET_DECLARE(int, drop_redirect); extern struct pr_usrreqs rip_usrreqs; #define V_ip_id VNET(ip_id) #define V_ip_defttl VNET(ip_defttl) #define V_ipforwarding VNET(ipforwarding) #ifdef IPSTEALTH #define V_ipstealth VNET(ipstealth) #endif #define V_ip_rsvpd VNET(ip_rsvpd) #define V_ip_mrouter VNET(ip_mrouter) #define V_rsvp_on VNET(rsvp_on) #define V_drop_redirect VNET(drop_redirect) void inp_freemoptions(struct ip_moptions *); int inp_getmoptions(struct inpcb *, struct sockopt *); int inp_setmoptions(struct inpcb *, struct sockopt *); int ip_ctloutput(struct socket *, struct sockopt *sopt); void ip_drain(void); int ip_fragment(struct ip *ip, struct mbuf **m_frag, int mtu, u_long if_hwassist_flags); void ip_forward(struct mbuf *m, int srcrt); void ip_init(void); extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, struct ip_moptions *); int ip_output(struct mbuf *, struct mbuf *, struct route *, int, struct ip_moptions *, struct inpcb *); int ipproto_register(short); int ipproto_unregister(short); struct mbuf * ip_reass(struct mbuf *); void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, struct mbuf *); void ip_slowtimo(void); void ip_fillid(struct ip *); int rip_ctloutput(struct socket *, struct sockopt *); void rip_ctlinput(int, struct sockaddr *, void *); void rip_init(void); int rip_input(struct mbuf **, int *, int); int rip_output(struct mbuf *, struct socket *, ...); int ipip_input(struct mbuf **, int *, int); int rsvp_input(struct mbuf **, int *, int); int ip_rsvp_init(struct socket *); int ip_rsvp_done(void); extern int (*ip_rsvp_vif)(struct socket *, struct sockopt *); extern void (*ip_rsvp_force_done)(struct socket *); extern int (*rsvp_input_p)(struct mbuf **, int *, int); VNET_DECLARE(struct pfil_head *, inet_pfil_head); #define V_inet_pfil_head VNET(inet_pfil_head) #define PFIL_INET_NAME "inet" void in_delayed_cksum(struct mbuf *m); /* Hooks for ipfw, dummynet, divert etc. Most are declared in raw_ip.c */ /* * Reference to an ipfw or packet filter rule that can be carried * outside critical sections. * A rule is identified by rulenum:rule_id which is ordered. * In version chain_id the rule can be found in slot 'slot', so * we don't need a lookup if chain_id == chain->id. * * On exit from the firewall this structure refers to the rule after * the matching one (slot points to the new rule; rulenum:rule_id-1 * is the matching rule), and additional info (e.g. info often contains * the insn argument or tablearg in the low 16 bits, in host format). * On entry, the structure is valid if slot>0, and refers to the starting * rules. 'info' contains the reason for reinject, e.g. divert port, * divert direction, and so on. */ struct ipfw_rule_ref { uint32_t slot; /* slot for matching rule */ uint32_t rulenum; /* matching rule number */ uint32_t rule_id; /* matching rule id */ uint32_t chain_id; /* ruleset id */ uint32_t info; /* see below */ }; enum { IPFW_INFO_MASK = 0x0000ffff, IPFW_INFO_OUT = 0x00000000, /* outgoing, just for convenience */ IPFW_INFO_IN = 0x80000000, /* incoming, overloads dir */ IPFW_ONEPASS = 0x40000000, /* One-pass, do not reinject */ IPFW_IS_MASK = 0x30000000, /* which source ? */ IPFW_IS_DIVERT = 0x20000000, IPFW_IS_DUMMYNET =0x10000000, IPFW_IS_PIPE = 0x08000000, /* pipe=1, queue = 0 */ }; #define MTAG_IPFW 1148380143 /* IPFW-tagged cookie */ #define MTAG_IPFW_RULE 1262273568 /* rule reference */ #define MTAG_IPFW_CALL 1308397630 /* call stack */ struct ip_fw_args; typedef int (*ip_fw_chk_ptr_t)(struct ip_fw_args *args); typedef int (*ip_fw_ctl_ptr_t)(struct sockopt *); VNET_DECLARE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr); #define V_ip_fw_ctl_ptr VNET(ip_fw_ctl_ptr) /* Divert hooks. */ extern void (*ip_divert_ptr)(struct mbuf *m, bool incoming); /* ng_ipfw hooks -- XXX make it the same as divert and dummynet */ extern int (*ng_ipfw_input_p)(struct mbuf **, struct ip_fw_args *, bool); extern int (*ip_dn_ctl_ptr)(struct sockopt *); extern int (*ip_dn_io_ptr)(struct mbuf **, struct ip_fw_args *); #endif /* _KERNEL */ #endif /* !_NETINET_IP_VAR_H_ */ Index: head/sys/netinet/tcp.h =================================================================== --- head/sys/netinet/tcp.h (revision 352656) +++ head/sys/netinet/tcp.h (revision 352657) @@ -1,365 +1,366 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)tcp.h 8.1 (Berkeley) 6/10/93 * $FreeBSD$ */ #ifndef _NETINET_TCP_H_ #define _NETINET_TCP_H_ #include #include #if __BSD_VISIBLE typedef u_int32_t tcp_seq; #define tcp6_seq tcp_seq /* for KAME src sync over BSD*'s */ #define tcp6hdr tcphdr /* for KAME src sync over BSD*'s */ /* * TCP header. * Per RFC 793, September, 1981. */ struct tcphdr { u_short th_sport; /* source port */ u_short th_dport; /* destination port */ tcp_seq th_seq; /* sequence number */ tcp_seq th_ack; /* acknowledgement number */ #if BYTE_ORDER == LITTLE_ENDIAN u_char th_x2:4, /* (unused) */ th_off:4; /* data offset */ #endif #if BYTE_ORDER == BIG_ENDIAN u_char th_off:4, /* data offset */ th_x2:4; /* (unused) */ #endif u_char th_flags; #define TH_FIN 0x01 #define TH_SYN 0x02 #define TH_RST 0x04 #define TH_PUSH 0x08 #define TH_ACK 0x10 #define TH_URG 0x20 #define TH_ECE 0x40 #define TH_CWR 0x80 #define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG|TH_ECE|TH_CWR) #define PRINT_TH_FLAGS "\20\1FIN\2SYN\3RST\4PUSH\5ACK\6URG\7ECE\10CWR" u_short th_win; /* window */ u_short th_sum; /* checksum */ u_short th_urp; /* urgent pointer */ }; #define TCPOPT_EOL 0 #define TCPOLEN_EOL 1 #define TCPOPT_PAD 0 /* padding after EOL */ #define TCPOLEN_PAD 1 #define TCPOPT_NOP 1 #define TCPOLEN_NOP 1 #define TCPOPT_MAXSEG 2 #define TCPOLEN_MAXSEG 4 #define TCPOPT_WINDOW 3 #define TCPOLEN_WINDOW 3 #define TCPOPT_SACK_PERMITTED 4 #define TCPOLEN_SACK_PERMITTED 2 #define TCPOPT_SACK 5 #define TCPOLEN_SACKHDR 2 #define TCPOLEN_SACK 8 /* 2*sizeof(tcp_seq) */ #define TCPOPT_TIMESTAMP 8 #define TCPOLEN_TIMESTAMP 10 #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ #define TCPOPT_SIGNATURE 19 /* Keyed MD5: RFC 2385 */ #define TCPOLEN_SIGNATURE 18 #define TCPOPT_FAST_OPEN 34 #define TCPOLEN_FAST_OPEN_EMPTY 2 /* Miscellaneous constants */ #define MAX_SACK_BLKS 6 /* Max # SACK blocks stored at receiver side */ #define TCP_MAX_SACK 4 /* MAX # SACKs sent in any segment */ /* * The default maximum segment size (MSS) to be used for new TCP connections * when path MTU discovery is not enabled. * * RFC879 derives the default MSS from the largest datagram size hosts are * minimally required to handle directly or through IP reassembly minus the * size of the IP and TCP header. With IPv6 the minimum MTU is specified * in RFC2460. * * For IPv4 the MSS is 576 - sizeof(struct tcpiphdr) * For IPv6 the MSS is IPV6_MMTU - sizeof(struct ip6_hdr) - sizeof(struct tcphdr) * * We use explicit numerical definition here to avoid header pollution. */ #define TCP_MSS 536 #define TCP6_MSS 1220 /* * Limit the lowest MSS we accept for path MTU discovery and the TCP SYN MSS * option. Allowing low values of MSS can consume significant resources and * be used to mount a resource exhaustion attack. * Connections requesting lower MSS values will be rounded up to this value * and the IP_DF flag will be cleared to allow fragmentation along the path. * * See tcp_subr.c tcp_minmss SYSCTL declaration for more comments. Setting * it to "0" disables the minmss check. * * The default value is fine for TCP across the Internet's smallest official * link MTU (256 bytes for AX.25 packet radio). However, a connection is very * unlikely to come across such low MTU interfaces these days (anno domini 2003). */ #define TCP_MINMSS 216 #define TCP_MAXWIN 65535 /* largest value for (unscaled) window */ #define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */ #define TCP_MAX_WINSHIFT 14 /* maximum window shift */ #define TCP_MAXBURST 4 /* maximum segments in a burst */ #define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */ #define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr)) /* max space left for options */ #define TCP_FASTOPEN_MIN_COOKIE_LEN 4 /* Per RFC7413 */ #define TCP_FASTOPEN_MAX_COOKIE_LEN 16 /* Per RFC7413 */ #define TCP_FASTOPEN_PSK_LEN 16 /* Same as TCP_FASTOPEN_KEY_LEN */ #endif /* __BSD_VISIBLE */ /* * User-settable options (used with setsockopt). These are discrete * values and are not masked together. Some values appear to be * bitmasks for historical reasons. */ #define TCP_NODELAY 1 /* don't delay send to coalesce packets */ #if __BSD_VISIBLE #define TCP_MAXSEG 2 /* set maximum segment size */ #define TCP_NOPUSH 4 /* don't push last block of write */ #define TCP_NOOPT 8 /* don't use TCP options */ #define TCP_MD5SIG 16 /* use MD5 digests (RFC2385) */ #define TCP_INFO 32 /* retrieve tcp_info structure */ #define TCP_LOG 34 /* configure event logging for connection */ #define TCP_LOGBUF 35 /* retrieve event log for connection */ #define TCP_LOGID 36 /* configure log ID to correlate connections */ #define TCP_LOGDUMP 37 /* dump connection log events to device */ #define TCP_LOGDUMPID 38 /* dump events from connections with same ID to device */ #define TCP_TXTLS_ENABLE 39 /* TLS framing and encryption for transmit */ #define TCP_TXTLS_MODE 40 /* Transmit TLS mode */ #define TCP_CONGESTION 64 /* get/set congestion control algorithm */ #define TCP_CCALGOOPT 65 /* get/set cc algorithm specific options */ #define TCP_DELACK 72 /* socket option for delayed ack */ #define TCP_KEEPINIT 128 /* N, time to establish connection */ #define TCP_KEEPIDLE 256 /* L,N,X start keeplives after this period */ #define TCP_KEEPINTVL 512 /* L,N interval between keepalives */ #define TCP_KEEPCNT 1024 /* L,N number of keepalives before close */ #define TCP_FASTOPEN 1025 /* enable TFO / was created via TFO */ #define TCP_PCAP_OUT 2048 /* number of output packets to keep */ #define TCP_PCAP_IN 4096 /* number of input packets to keep */ #define TCP_FUNCTION_BLK 8192 /* Set the tcp function pointers to the specified stack */ /* Options for Rack and BBR */ #define TCP_RACK_PROP 1051 /* RACK proportional rate reduction (bool) */ #define TCP_RACK_TLP_REDUCE 1052 /* RACK TLP cwnd reduction (bool) */ #define TCP_RACK_PACE_REDUCE 1053 /* RACK Pacing reduction factor (divisor) */ #define TCP_RACK_PACE_MAX_SEG 1054 /* Max segments in a pace */ #define TCP_RACK_PACE_ALWAYS 1055 /* Use the always pace method */ #define TCP_RACK_PROP_RATE 1056 /* The proportional reduction rate */ #define TCP_RACK_PRR_SENDALOT 1057 /* Allow PRR to send more than one seg */ #define TCP_RACK_MIN_TO 1058 /* Minimum time between rack t-o's in ms */ #define TCP_RACK_EARLY_RECOV 1059 /* Should recovery happen early (bool) */ #define TCP_RACK_EARLY_SEG 1060 /* If early recovery max segments */ #define TCP_RACK_REORD_THRESH 1061 /* RACK reorder threshold (shift amount) */ #define TCP_RACK_REORD_FADE 1062 /* Does reordering fade after ms time */ #define TCP_RACK_TLP_THRESH 1063 /* RACK TLP theshold i.e. srtt+(srtt/N) */ #define TCP_RACK_PKT_DELAY 1064 /* RACK added ms i.e. rack-rtt + reord + N */ #define TCP_RACK_TLP_INC_VAR 1065 /* Does TLP include rtt variance in t-o */ #define TCP_BBR_IWINTSO 1067 /* Initial TSO window for BBRs first sends */ #define TCP_BBR_RECFORCE 1068 /* Enter recovery force out a segment disregard pacer no longer valid */ #define TCP_BBR_STARTUP_PG 1069 /* Startup pacing gain */ #define TCP_BBR_DRAIN_PG 1070 /* Drain pacing gain */ #define TCP_BBR_RWND_IS_APP 1071 /* Rwnd limited is considered app limited */ #define TCP_BBR_PROBE_RTT_INT 1072 /* How long in useconds between probe-rtt */ #define TCP_BBR_ONE_RETRAN 1073 /* Is only one segment allowed out during retran */ #define TCP_BBR_STARTUP_LOSS_EXIT 1074 /* Do we exit a loss during startup if not 20% incr */ #define TCP_BBR_USE_LOWGAIN 1075 /* lower the gain in PROBE_BW enable */ #define TCP_BBR_LOWGAIN_THRESH 1076 /* Unused after 2.3 morphs to TSLIMITS >= 2.3 */ #define TCP_BBR_TSLIMITS 1076 /* Do we use experimental Timestamp limiting for our algo */ #define TCP_BBR_LOWGAIN_HALF 1077 /* Unused after 2.3 */ #define TCP_BBR_PACE_OH 1077 /* Reused in 4.2 for pacing overhead setting */ #define TCP_BBR_LOWGAIN_FD 1078 /* Unused after 2.3 */ #define TCP_BBR_HOLD_TARGET 1078 /* For 4.3 on */ #define TCP_BBR_USEDEL_RATE 1079 /* Enable use of delivery rate for loss recovery */ #define TCP_BBR_MIN_RTO 1080 /* Min RTO in milliseconds */ #define TCP_BBR_MAX_RTO 1081 /* Max RTO in milliseconds */ #define TCP_BBR_REC_OVER_HPTS 1082 /* Recovery override htps settings 0/1/3 */ #define TCP_BBR_UNLIMITED 1083 /* Not used before 2.3 and morphs to algorithm >= 2.3 */ #define TCP_BBR_ALGORITHM 1083 /* What measurement algo does BBR use netflix=0, google=1 */ #define TCP_BBR_DRAIN_INC_EXTRA 1084 /* Does the 3/4 drain target include the extra gain */ #define TCP_BBR_STARTUP_EXIT_EPOCH 1085 /* what epoch gets us out of startup */ #define TCP_BBR_PACE_PER_SEC 1086 #define TCP_BBR_PACE_DEL_TAR 1087 #define TCP_BBR_PACE_SEG_MAX 1088 #define TCP_BBR_PACE_SEG_MIN 1089 #define TCP_BBR_PACE_CROSS 1090 #define TCP_RACK_IDLE_REDUCE_HIGH 1092 /* Reduce the highest cwnd seen to IW on idle */ #define TCP_RACK_MIN_PACE 1093 /* Do we enforce rack min pace time */ #define TCP_RACK_MIN_PACE_SEG 1094 /* If so what is the seg threshould */ #define TCP_RACK_GP_INCREASE 1094 /* After 4.1 its the GP increase */ #define TCP_RACK_TLP_USE 1095 #define TCP_BBR_ACK_COMP_ALG 1096 /* Not used */ #define TCP_BBR_TMR_PACE_OH 1096 /* Recycled in 4.2 */ #define TCP_BBR_EXTRA_GAIN 1097 +#define TCP_RACK_DO_DETECTION 1097 /* Recycle of extra gain for rack, attack detection */ #define TCP_BBR_RACK_RTT_USE 1098 /* what RTT should we use 0, 1, or 2? */ #define TCP_BBR_RETRAN_WTSO 1099 #define TCP_DATA_AFTER_CLOSE 1100 #define TCP_BBR_PROBE_RTT_GAIN 1101 #define TCP_BBR_PROBE_RTT_LEN 1102 #define TCP_BBR_SEND_IWND_IN_TSO 1103 /* Do we burst out whole iwin size chunks at start? */ #define TCP_BBR_USE_RACK_CHEAT 1104 /* Do we use the rack cheat for pacing rxt's */ #define TCP_BBR_HDWR_PACE 1105 /* Enable/disable hardware pacing */ #define TCP_BBR_UTTER_MAX_TSO 1106 /* Do we enforce an utter max TSO size */ #define TCP_BBR_EXTRA_STATE 1107 /* Special exit-persist catch up */ #define TCP_BBR_FLOOR_MIN_TSO 1108 /* The min tso size */ #define TCP_BBR_MIN_TOPACEOUT 1109 /* Do we suspend pacing until */ #define TCP_BBR_TSTMP_RAISES 1110 /* Can a timestamp measurement raise the b/w */ #define TCP_BBR_POLICER_DETECT 1111 /* Turn on/off google mode policer detection */ /* Start of reserved space for third-party user-settable options. */ #define TCP_VENDOR SO_VENDOR #define TCP_CA_NAME_MAX 16 /* max congestion control name length */ #define TCPI_OPT_TIMESTAMPS 0x01 #define TCPI_OPT_SACK 0x02 #define TCPI_OPT_WSCALE 0x04 #define TCPI_OPT_ECN 0x08 #define TCPI_OPT_TOE 0x10 /* Maximum length of log ID. */ #define TCP_LOG_ID_LEN 64 /* * The TCP_INFO socket option comes from the Linux 2.6 TCP API, and permits * the caller to query certain information about the state of a TCP * connection. We provide an overlapping set of fields with the Linux * implementation, but since this is a fixed size structure, room has been * left for growth. In order to maximize potential future compatibility with * the Linux API, the same variable names and order have been adopted, and * padding left to make room for omitted fields in case they are added later. * * XXX: This is currently an unstable ABI/API, in that it is expected to * change. */ struct tcp_info { u_int8_t tcpi_state; /* TCP FSM state. */ u_int8_t __tcpi_ca_state; u_int8_t __tcpi_retransmits; u_int8_t __tcpi_probes; u_int8_t __tcpi_backoff; u_int8_t tcpi_options; /* Options enabled on conn. */ u_int8_t tcpi_snd_wscale:4, /* RFC1323 send shift value. */ tcpi_rcv_wscale:4; /* RFC1323 recv shift value. */ u_int32_t tcpi_rto; /* Retransmission timeout (usec). */ u_int32_t __tcpi_ato; u_int32_t tcpi_snd_mss; /* Max segment size for send. */ u_int32_t tcpi_rcv_mss; /* Max segment size for receive. */ u_int32_t __tcpi_unacked; u_int32_t __tcpi_sacked; u_int32_t __tcpi_lost; u_int32_t __tcpi_retrans; u_int32_t __tcpi_fackets; /* Times; measurements in usecs. */ u_int32_t __tcpi_last_data_sent; u_int32_t __tcpi_last_ack_sent; /* Also unimpl. on Linux? */ u_int32_t tcpi_last_data_recv; /* Time since last recv data. */ u_int32_t __tcpi_last_ack_recv; /* Metrics; variable units. */ u_int32_t __tcpi_pmtu; u_int32_t __tcpi_rcv_ssthresh; u_int32_t tcpi_rtt; /* Smoothed RTT in usecs. */ u_int32_t tcpi_rttvar; /* RTT variance in usecs. */ u_int32_t tcpi_snd_ssthresh; /* Slow start threshold. */ u_int32_t tcpi_snd_cwnd; /* Send congestion window. */ u_int32_t __tcpi_advmss; u_int32_t __tcpi_reordering; u_int32_t __tcpi_rcv_rtt; u_int32_t tcpi_rcv_space; /* Advertised recv window. */ /* FreeBSD extensions to tcp_info. */ u_int32_t tcpi_snd_wnd; /* Advertised send window. */ u_int32_t tcpi_snd_bwnd; /* No longer used. */ u_int32_t tcpi_snd_nxt; /* Next egress seqno */ u_int32_t tcpi_rcv_nxt; /* Next ingress seqno */ u_int32_t tcpi_toe_tid; /* HWTID for TOE endpoints */ u_int32_t tcpi_snd_rexmitpack; /* Retransmitted packets */ u_int32_t tcpi_rcv_ooopack; /* Out-of-order packets */ u_int32_t tcpi_snd_zerowin; /* Zero-sized windows sent */ /* Padding to grow without breaking ABI. */ u_int32_t __tcpi_pad[26]; /* Padding. */ }; /* * If this structure is provided when setting the TCP_FASTOPEN socket * option, and the enable member is non-zero, a subsequent connect will use * pre-shared key (PSK) mode using the provided key. */ struct tcp_fastopen { int enable; uint8_t psk[TCP_FASTOPEN_PSK_LEN]; }; #endif #define TCP_FUNCTION_NAME_LEN_MAX 32 struct tcp_function_set { char function_set_name[TCP_FUNCTION_NAME_LEN_MAX]; uint32_t pcbcnt; }; /* TLS modes for TCP_TXTLS_MODE */ #define TCP_TLS_MODE_NONE 0 #define TCP_TLS_MODE_SW 1 #define TCP_TLS_MODE_IFNET 2 /* * TCP Control message types */ #define TLS_SET_RECORD_TYPE 1 #endif /* !_NETINET_TCP_H_ */ Index: head/sys/netinet/tcp_stacks/bbr.c =================================================================== --- head/sys/netinet/tcp_stacks/bbr.c (nonexistent) +++ head/sys/netinet/tcp_stacks/bbr.c (revision 352657) @@ -0,0 +1,15189 @@ +/*- + * Copyright (c) 2016-2019 + * Netflix Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ +/** + * Author: Randall Stewart + * This work is based on the ACM Queue paper + * BBR - Congestion Based Congestion Control + * and also numerous discussions with Neal, Yuchung and Van. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include "opt_inet.h" +#include "opt_inet6.h" +#include "opt_ipsec.h" +#include "opt_tcpdebug.h" +#include "opt_ratelimit.h" +#include "opt_kern_tls.h" +#include +#include +#include +#ifdef TCP_HHOOK +#include +#endif +#include +#include +#include +#include +#include +#ifdef KERN_TLS +#include +#endif +#include +#include +#include +#include +#ifdef NETFLIX_STATS +#include /* Must come after qmath.h and tree.h */ +#endif +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define TCPSTATES /* for logging */ + +#include +#include +#include +#include +#include /* required for icmp_var.h */ +#include /* for ICMP_BANDLIM */ +#include +#include +#include +#include +#define TCPOUTFLAGS +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef TCPDEBUG +#include +#endif /* TCPDEBUG */ +#ifdef TCP_OFFLOAD +#include +#endif +#ifdef INET6 +#include +#endif +#include + +#include +#include +#include +#include + +#if defined(IPSEC) || defined(IPSEC_SUPPORT) +#include +#include +#endif /* IPSEC */ + +#include +#include +#include + +#ifdef MAC +#include +#endif + +#include "sack_filter.h" +#include "tcp_bbr.h" +#include "rack_bbr_common.h" +uma_zone_t bbr_zone; +uma_zone_t bbr_pcb_zone; + +struct sysctl_ctx_list bbr_sysctl_ctx; +struct sysctl_oid *bbr_sysctl_root; + +#define TCPT_RANGESET_NOSLOP(tv, value, tvmin, tvmax) do { \ + (tv) = (value); \ + if ((u_long)(tv) < (u_long)(tvmin)) \ + (tv) = (tvmin); \ + if ((u_long)(tv) > (u_long)(tvmax)) \ + (tv) = (tvmax); \ +} while(0) + +/*#define BBR_INVARIANT 1*/ + +/* + * initial window + */ +static uint32_t bbr_def_init_win = 10; +static int32_t bbr_persist_min = 250000; /* 250ms */ +static int32_t bbr_persist_max = 1000000; /* 1 Second */ +static int32_t bbr_cwnd_may_shrink = 0; +static int32_t bbr_cwndtarget_rtt_touse = BBR_RTT_PROP; +static int32_t bbr_num_pktepo_for_del_limit = BBR_NUM_RTTS_FOR_DEL_LIMIT; +static int32_t bbr_hardware_pacing_limit = 8000; +static int32_t bbr_quanta = 3; /* How much extra quanta do we get? */ +static int32_t bbr_no_retran = 0; +static int32_t bbr_tcp_map_entries_limit = 1500; +static int32_t bbr_tcp_map_split_limit = 256; + +static int32_t bbr_error_base_paceout = 10000; /* usec to pace */ +static int32_t bbr_max_net_error_cnt = 10; +/* Should the following be dynamic too -- loss wise */ +static int32_t bbr_rtt_gain_thresh = 0; +/* Measurement controls */ +static int32_t bbr_use_google_algo = 1; +static int32_t bbr_ts_limiting = 1; +static int32_t bbr_ts_can_raise = 0; +static int32_t bbr_do_red = 600; +static int32_t bbr_red_scale = 20000; +static int32_t bbr_red_mul = 1; +static int32_t bbr_red_div = 2; +static int32_t bbr_red_growth_restrict = 1; +static int32_t bbr_target_is_bbunit = 0; +static int32_t bbr_drop_limit = 0; +/* + * How much gain do we need to see to + * stay in startup? + */ +static int32_t bbr_marks_rxt_sack_passed = 0; +static int32_t bbr_start_exit = 25; +static int32_t bbr_low_start_exit = 25; /* When we are in reduced gain */ +static int32_t bbr_startup_loss_thresh = 2000; /* 20.00% loss */ +static int32_t bbr_hptsi_max_mul = 1; /* These two mul/div assure a min pacing */ +static int32_t bbr_hptsi_max_div = 2; /* time, 0 means turned off. We need this + * if we go back ever to where the pacer + * has priority over timers. + */ +static int32_t bbr_policer_call_from_rack_to = 0; +static int32_t bbr_policer_detection_enabled = 1; +static int32_t bbr_min_measurements_req = 1; /* We need at least 2 + * measurments before we are + * "good" note that 2 == 1. + * This is because we use a > + * comparison. This means if + * min_measure was 0, it takes + * num-measures > min(0) and + * you get 1 measurement and + * you are good. Set to 1, you + * have to have two + * measurements (this is done + * to prevent it from being ok + * to have no measurements). */ +static int32_t bbr_no_pacing_until = 4; + +static int32_t bbr_min_usec_delta = 20000; /* 20,000 usecs */ +static int32_t bbr_min_peer_delta = 20; /* 20 units */ +static int32_t bbr_delta_percent = 150; /* 15.0 % */ + +static int32_t bbr_target_cwnd_mult_limit = 8; +/* + * bbr_cwnd_min_val is the number of + * segments we hold to in the RTT probe + * state typically 4. + */ +static int32_t bbr_cwnd_min_val = BBR_PROBERTT_NUM_MSS; + + +static int32_t bbr_cwnd_min_val_hs = BBR_HIGHSPEED_NUM_MSS; + +static int32_t bbr_gain_to_target = 1; +static int32_t bbr_gain_gets_extra_too = 1; +/* + * bbr_high_gain is the 2/ln(2) value we need + * to double the sending rate in startup. This + * is used for both cwnd and hptsi gain's. + */ +static int32_t bbr_high_gain = BBR_UNIT * 2885 / 1000 + 1; +static int32_t bbr_startup_lower = BBR_UNIT * 1500 / 1000 + 1; +static int32_t bbr_use_lower_gain_in_startup = 1; + +/* thresholds for reduction on drain in sub-states/drain */ +static int32_t bbr_drain_rtt = BBR_SRTT; +static int32_t bbr_drain_floor = 88; +static int32_t google_allow_early_out = 1; +static int32_t google_consider_lost = 1; +static int32_t bbr_drain_drop_mul = 4; +static int32_t bbr_drain_drop_div = 5; +static int32_t bbr_rand_ot = 50; +static int32_t bbr_can_force_probertt = 0; +static int32_t bbr_can_adjust_probertt = 1; +static int32_t bbr_probertt_sets_rtt = 0; +static int32_t bbr_can_use_ts_for_rtt = 1; +static int32_t bbr_is_ratio = 0; +static int32_t bbr_sub_drain_app_limit = 1; +static int32_t bbr_prtt_slam_cwnd = 1; +static int32_t bbr_sub_drain_slam_cwnd = 1; +static int32_t bbr_slam_cwnd_in_main_drain = 1; +static int32_t bbr_filter_len_sec = 6; /* How long does the rttProp filter + * hold */ +static uint32_t bbr_rtt_probe_limit = (USECS_IN_SECOND * 4); +/* + * bbr_drain_gain is the reverse of the high_gain + * designed to drain back out the standing queue + * that is formed in startup by causing a larger + * hptsi gain and thus drainging the packets + * in flight. + */ +static int32_t bbr_drain_gain = BBR_UNIT * 1000 / 2885; +static int32_t bbr_rttprobe_gain = 192; + +/* + * The cwnd_gain is the default cwnd gain applied when + * calculating a target cwnd. Note that the cwnd is + * a secondary factor in the way BBR works (see the + * paper and think about it, it will take some time). + * Basically the hptsi_gain spreads the packets out + * so you never get more than BDP to the peer even + * if the cwnd is high. In our implemenation that + * means in non-recovery/retransmission scenarios + * cwnd will never be reached by the flight-size. + */ +static int32_t bbr_cwnd_gain = BBR_UNIT * 2; +static int32_t bbr_tlp_type_to_use = BBR_SRTT; +static int32_t bbr_delack_time = 100000; /* 100ms in useconds */ +static int32_t bbr_sack_not_required = 0; /* set to one to allow non-sack to use bbr */ +static int32_t bbr_initial_bw_bps = 62500; /* 500kbps in bytes ps */ +static int32_t bbr_ignore_data_after_close = 1; +static int16_t bbr_hptsi_gain[] = { + (BBR_UNIT *5 / 4), + (BBR_UNIT * 3 / 4), + BBR_UNIT, + BBR_UNIT, + BBR_UNIT, + BBR_UNIT, + BBR_UNIT, + BBR_UNIT +}; +int32_t bbr_use_rack_resend_cheat = 1; +int32_t bbr_sends_full_iwnd = 1; + +#define BBR_HPTSI_GAIN_MAX 8 +/* + * The BBR module incorporates a number of + * TCP ideas that have been put out into the IETF + * over the last few years: + * - Yuchung Cheng's RACK TCP (for which its named) that + * will stop us using the number of dup acks and instead + * use time as the gage of when we retransmit. + * - Reorder Detection of RFC4737 and the Tail-Loss probe draft + * of Dukkipati et.al. + * - Van Jacobson's et.al BBR. + * + * RACK depends on SACK, so if an endpoint arrives that + * cannot do SACK the state machine below will shuttle the + * connection back to using the "default" TCP stack that is + * in FreeBSD. + * + * To implement BBR and RACK the original TCP stack was first decomposed + * into a functional state machine with individual states + * for each of the possible TCP connection states. The do_segement + * functions role in life is to mandate the connection supports SACK + * initially and then assure that the RACK state matches the conenction + * state before calling the states do_segment function. Data processing + * of inbound segments also now happens in the hpts_do_segment in general + * with only one exception. This is so we can keep the connection on + * a single CPU. + * + * Each state is simplified due to the fact that the original do_segment + * has been decomposed and we *know* what state we are in (no + * switches on the state) and all tests for SACK are gone. This + * greatly simplifies what each state does. + * + * TCP output is also over-written with a new version since it + * must maintain the new rack scoreboard and has had hptsi + * integrated as a requirment. Still todo is to eliminate the + * use of the callout_() system and use the hpts for all + * timers as well. + */ +static uint32_t bbr_rtt_probe_time = 200000; /* 200ms in micro seconds */ +static uint32_t bbr_rtt_probe_cwndtarg = 4; /* How many mss's outstanding */ +static const int32_t bbr_min_req_free = 2; /* The min we must have on the + * free list */ +static int32_t bbr_tlp_thresh = 1; +static int32_t bbr_reorder_thresh = 2; +static int32_t bbr_reorder_fade = 60000000; /* 0 - never fade, def + * 60,000,000 - 60 seconds */ +static int32_t bbr_pkt_delay = 1000; +static int32_t bbr_min_to = 1000; /* Number of usec's minimum timeout */ +static int32_t bbr_incr_timers = 1; + +static int32_t bbr_tlp_min = 10000; /* 10ms in usecs */ +static int32_t bbr_delayed_ack_time = 200000; /* 200ms in usecs */ +static int32_t bbr_exit_startup_at_loss = 1; + +/* + * bbr_lt_bw_ratio is 1/8th + * bbr_lt_bw_diff is < 4 Kbit/sec + */ +static uint64_t bbr_lt_bw_diff = 4000 / 8; /* In bytes per second */ +static uint64_t bbr_lt_bw_ratio = 8; /* For 1/8th */ +static uint32_t bbr_lt_bw_max_rtts = 48; /* How many rtt's do we use + * the lt_bw for */ +static uint32_t bbr_lt_intvl_min_rtts = 4; /* Min num of RTT's to measure + * lt_bw */ +static int32_t bbr_lt_intvl_fp = 0; /* False positive epoch diff */ +static int32_t bbr_lt_loss_thresh = 196; /* Lost vs delivered % */ +static int32_t bbr_lt_fd_thresh = 100; /* false detection % */ + +static int32_t bbr_verbose_logging = 0; +/* + * Currently regular tcp has a rto_min of 30ms + * the backoff goes 12 times so that ends up + * being a total of 122.850 seconds before a + * connection is killed. + */ +static int32_t bbr_rto_min_ms = 30; /* 30ms same as main freebsd */ +static int32_t bbr_rto_max_sec = 4; /* 4 seconds */ + +/****************************************************/ +/* DEFAULT TSO SIZING (cpu performance impacting) */ +/****************************************************/ +/* What amount is our formula using to get TSO size */ +static int32_t bbr_hptsi_per_second = 1000; + +/* + * For hptsi under bbr_cross_over connections what is delay + * target 7ms (in usec) combined with a seg_max of 2 + * gets us close to identical google behavior in + * TSO size selection (possibly more 1MSS sends). + */ +static int32_t bbr_hptsi_segments_delay_tar = 7000; + +/* Does pacing delay include overhead's in its time calculations? */ +static int32_t bbr_include_enet_oh = 0; +static int32_t bbr_include_ip_oh = 1; +static int32_t bbr_include_tcp_oh = 1; +static int32_t bbr_google_discount = 10; + +/* Do we use (nf mode) pkt-epoch to drive us or rttProp? */ +static int32_t bbr_state_is_pkt_epoch = 0; +static int32_t bbr_state_drain_2_tar = 1; +/* What is the max the 0 - bbr_cross_over MBPS TSO target + * can reach using our delay target. Note that this + * value becomes the floor for the cross over + * algorithm. + */ +static int32_t bbr_hptsi_segments_max = 2; +static int32_t bbr_hptsi_segments_floor = 1; +static int32_t bbr_hptsi_utter_max = 0; + +/* What is the min the 0 - bbr_cross-over MBPS TSO target can be */ +static int32_t bbr_hptsi_bytes_min = 1460; +static int32_t bbr_all_get_min = 0; + +/* Cross over point from algo-a to algo-b */ +static uint32_t bbr_cross_over = TWENTY_THREE_MBPS; + +/* Do we deal with our restart state? */ +static int32_t bbr_uses_idle_restart = 0; +static int32_t bbr_idle_restart_threshold = 100000; /* 100ms in useconds */ + +/* Do we allow hardware pacing? */ +static int32_t bbr_allow_hdwr_pacing = 0; +static int32_t bbr_hdwr_pace_adjust = 2; /* multipler when we calc the tso size */ +static int32_t bbr_hdwr_pace_floor = 1; +static int32_t bbr_hdwr_pacing_delay_cnt = 10; + +/****************************************************/ +static int32_t bbr_resends_use_tso = 0; +static int32_t bbr_tlp_max_resend = 2; +static int32_t bbr_sack_block_limit = 128; + +#define BBR_MAX_STAT 19 +counter_u64_t bbr_state_time[BBR_MAX_STAT]; +counter_u64_t bbr_state_lost[BBR_MAX_STAT]; +counter_u64_t bbr_state_resend[BBR_MAX_STAT]; +counter_u64_t bbr_stat_arry[BBR_STAT_SIZE]; +counter_u64_t bbr_opts_arry[BBR_OPTS_SIZE]; +counter_u64_t bbr_out_size[TCP_MSS_ACCT_SIZE]; +counter_u64_t bbr_flows_whdwr_pacing; +counter_u64_t bbr_flows_nohdwr_pacing; + +counter_u64_t bbr_nohdwr_pacing_enobuf; +counter_u64_t bbr_hdwr_pacing_enobuf; + +static inline uint64_t bbr_get_bw(struct tcp_bbr *bbr); + +/* + * Static defintions we need for forward declarations. + */ +static uint32_t +bbr_get_pacing_length(struct tcp_bbr *bbr, uint16_t gain, + uint32_t useconds_time, uint64_t bw); +static uint32_t +bbr_get_a_state_target(struct tcp_bbr *bbr, uint32_t gain); +static void + bbr_set_state(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t win); +static void +bbr_set_probebw_gains(struct tcp_bbr *bbr, uint32_t cts, uint32_t losses); +static void +bbr_substate_change(struct tcp_bbr *bbr, uint32_t cts, int line, + int dolog); +static uint32_t +bbr_get_target_cwnd(struct tcp_bbr *bbr, uint64_t bw, uint32_t gain); +static void +bbr_state_change(struct tcp_bbr *bbr, uint32_t cts, int32_t epoch, + int32_t pkt_epoch, uint32_t losses); +static uint32_t +bbr_calc_thresh_rack(struct tcp_bbr *bbr, uint32_t srtt, uint32_t cts, struct bbr_sendmap *rsm); +static uint32_t bbr_initial_cwnd(struct tcp_bbr *bbr, struct tcpcb *tp); +static uint32_t +bbr_calc_thresh_tlp(struct tcpcb *tp, struct tcp_bbr *bbr, + struct bbr_sendmap *rsm, uint32_t srtt, + uint32_t cts); +static void +bbr_exit_persist(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts, + int32_t line); +static void + bbr_set_state_target(struct tcp_bbr *bbr, int line); +static void + bbr_enter_probe_rtt(struct tcp_bbr *bbr, uint32_t cts, int32_t line); + +static void + bbr_log_progress_event(struct tcp_bbr *bbr, struct tcpcb *tp, uint32_t tick, int event, int line); + +static void + tcp_bbr_tso_size_check(struct tcp_bbr *bbr, uint32_t cts); + +static void + bbr_setup_red_bw(struct tcp_bbr *bbr, uint32_t cts); + +static void + bbr_log_rtt_shrinks(struct tcp_bbr *bbr, uint32_t cts, uint32_t applied, uint32_t rtt, + uint32_t line, uint8_t is_start, uint16_t set); + +static struct bbr_sendmap * + bbr_find_lowest_rsm(struct tcp_bbr *bbr); +static __inline uint32_t +bbr_get_rtt(struct tcp_bbr *bbr, int32_t rtt_type); +static void + bbr_log_to_start(struct tcp_bbr *bbr, uint32_t cts, uint32_t to, int32_t slot, uint8_t which); + +static void +bbr_log_timer_var(struct tcp_bbr *bbr, int mode, uint32_t cts, uint32_t time_since_sent, uint32_t srtt, + uint32_t thresh, uint32_t to); +static void + bbr_log_hpts_diag(struct tcp_bbr *bbr, uint32_t cts, struct hpts_diag *diag); + +static void +bbr_log_type_bbrsnd(struct tcp_bbr *bbr, uint32_t len, uint32_t slot, + uint32_t del_by, uint32_t cts, uint32_t sloton, uint32_t prev_delay); + +static void +bbr_enter_persist(struct tcpcb *tp, struct tcp_bbr *bbr, + uint32_t cts, int32_t line); +static void + bbr_stop_all_timers(struct tcpcb *tp); +static void + bbr_exit_probe_rtt(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts); +static void + bbr_check_probe_rtt_limits(struct tcp_bbr *bbr, uint32_t cts); +static void + bbr_timer_cancel(struct tcp_bbr *bbr, int32_t line, uint32_t cts); + + +static void +bbr_log_pacing_delay_calc(struct tcp_bbr *bbr, uint16_t gain, uint32_t len, + uint32_t cts, uint32_t usecs, uint64_t bw, uint32_t override, int mod); + +static inline uint8_t +bbr_state_val(struct tcp_bbr *bbr) +{ + return(bbr->rc_bbr_substate); +} + +static inline uint32_t +get_min_cwnd(struct tcp_bbr *bbr) +{ + int mss; + + mss = min((bbr->rc_tp->t_maxseg - bbr->rc_last_options), bbr->r_ctl.rc_pace_max_segs); + if (bbr_get_rtt(bbr, BBR_RTT_PROP) < BBR_HIGH_SPEED) + return (bbr_cwnd_min_val_hs * mss); + else + return (bbr_cwnd_min_val * mss); +} + +static uint32_t +bbr_get_persists_timer_val(struct tcpcb *tp, struct tcp_bbr *bbr) +{ + uint64_t srtt, var; + uint64_t ret_val; + + bbr->r_ctl.rc_hpts_flags |= PACE_TMR_PERSIT; + if (tp->t_srtt == 0) { + srtt = (uint64_t)BBR_INITIAL_RTO; + var = 0; + } else { + srtt = ((uint64_t)TICKS_2_USEC(tp->t_srtt) >> TCP_RTT_SHIFT); + var = ((uint64_t)TICKS_2_USEC(tp->t_rttvar) >> TCP_RTT_SHIFT); + } + TCPT_RANGESET_NOSLOP(ret_val, ((srtt + var) * tcp_backoff[tp->t_rxtshift]), + bbr_persist_min, bbr_persist_max); + return ((uint32_t)ret_val); +} + +static uint32_t +bbr_timer_start(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts) +{ + /* + * Start the FR timer, we do this based on getting the first one in + * the rc_tmap. Note that if its NULL we must stop the timer. in all + * events we need to stop the running timer (if its running) before + * starting the new one. + */ + uint32_t thresh, exp, to, srtt, time_since_sent, tstmp_touse; + int32_t idx; + int32_t is_tlp_timer = 0; + struct bbr_sendmap *rsm; + + if (bbr->rc_all_timers_stopped) { + /* All timers have been stopped none are to run */ + return (0); + } + if (bbr->rc_in_persist) { + /* We can't start any timer in persists */ + return (bbr_get_persists_timer_val(tp, bbr)); + } + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_tmap); + if ((rsm == NULL) || + ((tp->t_flags & TF_SACK_PERMIT) == 0) || + (tp->t_state < TCPS_ESTABLISHED)) { + /* Nothing on the send map */ +activate_rxt: + if (SEQ_LT(tp->snd_una, tp->snd_max) || sbavail(&(tp->t_inpcb->inp_socket->so_snd))) { + uint64_t tov; + + time_since_sent = 0; + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_tmap); + if (rsm) { + idx = rsm->r_rtr_cnt - 1; + if (TSTMP_GEQ(rsm->r_tim_lastsent[idx], bbr->r_ctl.rc_tlp_rxt_last_time)) + tstmp_touse = rsm->r_tim_lastsent[idx]; + else + tstmp_touse = bbr->r_ctl.rc_tlp_rxt_last_time; + if (TSTMP_GT(tstmp_touse, cts)) + time_since_sent = cts - tstmp_touse; + } + bbr->r_ctl.rc_hpts_flags |= PACE_TMR_RXT; + if (tp->t_srtt == 0) + tov = BBR_INITIAL_RTO; + else + tov = ((uint64_t)(TICKS_2_USEC(tp->t_srtt) + + ((uint64_t)TICKS_2_USEC(tp->t_rttvar) * (uint64_t)4)) >> TCP_RTT_SHIFT); + if (tp->t_rxtshift) + tov *= tcp_backoff[tp->t_rxtshift]; + if (tov > time_since_sent) + tov -= time_since_sent; + else + tov = bbr->r_ctl.rc_min_to; + TCPT_RANGESET_NOSLOP(to, tov, + (bbr->r_ctl.rc_min_rto_ms * MS_IN_USEC), + (bbr->rc_max_rto_sec * USECS_IN_SECOND)); + bbr_log_timer_var(bbr, 2, cts, 0, srtt, 0, to); + return (to); + } + return (0); + } + if (rsm->r_flags & BBR_ACKED) { + rsm = bbr_find_lowest_rsm(bbr); + if (rsm == NULL) { + /* No lowest? */ + goto activate_rxt; + } + } + /* Convert from ms to usecs */ + if (rsm->r_flags & BBR_SACK_PASSED) { + if ((tp->t_flags & TF_SENTFIN) && + ((tp->snd_max - tp->snd_una) == 1) && + (rsm->r_flags & BBR_HAS_FIN)) { + /* + * We don't start a bbr rack timer if all we have is + * a FIN outstanding. + */ + goto activate_rxt; + } + srtt = bbr_get_rtt(bbr, BBR_RTT_RACK); + thresh = bbr_calc_thresh_rack(bbr, srtt, cts, rsm); + idx = rsm->r_rtr_cnt - 1; + exp = rsm->r_tim_lastsent[idx] + thresh; + if (SEQ_GEQ(exp, cts)) { + to = exp - cts; + if (to < bbr->r_ctl.rc_min_to) { + to = bbr->r_ctl.rc_min_to; + } + } else { + to = bbr->r_ctl.rc_min_to; + } + } else { + /* Ok we need to do a TLP not RACK */ + if (bbr->rc_tlp_in_progress != 0) { + /* + * The previous send was a TLP. + */ + goto activate_rxt; + } + rsm = TAILQ_LAST_FAST(&bbr->r_ctl.rc_tmap, bbr_sendmap, r_tnext); + if (rsm == NULL) { + /* We found no rsm to TLP with. */ + goto activate_rxt; + } + if (rsm->r_flags & BBR_HAS_FIN) { + /* If its a FIN we don't do TLP */ + rsm = NULL; + goto activate_rxt; + } + time_since_sent = 0; + idx = rsm->r_rtr_cnt - 1; + if (TSTMP_GEQ(rsm->r_tim_lastsent[idx], bbr->r_ctl.rc_tlp_rxt_last_time)) + tstmp_touse = rsm->r_tim_lastsent[idx]; + else + tstmp_touse = bbr->r_ctl.rc_tlp_rxt_last_time; + if (TSTMP_GT(tstmp_touse, cts)) + time_since_sent = cts - tstmp_touse; + is_tlp_timer = 1; + srtt = bbr_get_rtt(bbr, bbr_tlp_type_to_use); + thresh = bbr_calc_thresh_tlp(tp, bbr, rsm, srtt, cts); + if (thresh > time_since_sent) + to = thresh - time_since_sent; + else + to = bbr->r_ctl.rc_min_to; + if (to > (((uint32_t)bbr->rc_max_rto_sec) * USECS_IN_SECOND)) { + /* + * If the TLP time works out to larger than the max + * RTO lets not do TLP.. just RTO. + */ + goto activate_rxt; + } + if ((bbr->rc_tlp_rtx_out == 1) && + (rsm->r_start == bbr->r_ctl.rc_last_tlp_seq)) { + /* + * Second retransmit of the same TLP + * lets not. + */ + bbr->rc_tlp_rtx_out = 0; + goto activate_rxt; + } + if (rsm->r_start != bbr->r_ctl.rc_last_tlp_seq) { + /* + * The tail is no longer the last one I did a probe + * on + */ + bbr->r_ctl.rc_tlp_seg_send_cnt = 0; + bbr->r_ctl.rc_last_tlp_seq = rsm->r_start; + } + } + if (is_tlp_timer == 0) { + BBR_STAT_INC(bbr_to_arm_rack); + bbr->r_ctl.rc_hpts_flags |= PACE_TMR_RACK; + } else { + bbr_log_timer_var(bbr, 1, cts, time_since_sent, srtt, thresh, to); + if (bbr->r_ctl.rc_tlp_seg_send_cnt > bbr_tlp_max_resend) { + /* + * We have exceeded how many times we can retran the + * current TLP timer, switch to the RTO timer. + */ + goto activate_rxt; + } else { + BBR_STAT_INC(bbr_to_arm_tlp); + bbr->r_ctl.rc_hpts_flags |= PACE_TMR_TLP; + } + } + return (to); +} + +static inline int32_t +bbr_minseg(struct tcp_bbr *bbr) +{ + return (bbr->r_ctl.rc_pace_min_segs - bbr->rc_last_options); +} + +static void +bbr_start_hpts_timer(struct tcp_bbr *bbr, struct tcpcb *tp, uint32_t cts, int32_t frm, int32_t slot, uint32_t tot_len) +{ + struct inpcb *inp; + struct hpts_diag diag; + uint32_t delayed_ack = 0; + uint32_t left = 0; + uint32_t hpts_timeout; + uint8_t stopped; + int32_t delay_calc = 0; + uint32_t prev_delay = 0; + + inp = tp->t_inpcb; + if (inp->inp_in_hpts) { + /* A previous call is already set up */ + return; + } + if ((tp->t_state == TCPS_CLOSED) || + (tp->t_state == TCPS_LISTEN)) { + return; + } + stopped = bbr->rc_tmr_stopped; + if (stopped && TSTMP_GT(bbr->r_ctl.rc_timer_exp, cts)) { + left = bbr->r_ctl.rc_timer_exp - cts; + } + bbr->r_ctl.rc_hpts_flags = 0; + bbr->r_ctl.rc_timer_exp = 0; + prev_delay = bbr->r_ctl.rc_last_delay_val; + if (bbr->r_ctl.rc_last_delay_val && + (slot == 0)) { + /* + * If a previous pacer delay was in place we + * are not coming from the output side (where + * we calculate a delay, more likely a timer). + */ + slot = bbr->r_ctl.rc_last_delay_val; + if (TSTMP_GT(cts, bbr->rc_pacer_started)) { + /* Compensate for time passed */ + delay_calc = cts - bbr->rc_pacer_started; + if (delay_calc <= slot) + slot -= delay_calc; + } + } + /* Do we have early to make up for by pushing out the pacing time? */ + if (bbr->r_agg_early_set) { + bbr_log_pacing_delay_calc(bbr, 0, bbr->r_ctl.rc_agg_early, cts, slot, 0, bbr->r_agg_early_set, 2); + slot += bbr->r_ctl.rc_agg_early; + bbr->r_ctl.rc_agg_early = 0; + bbr->r_agg_early_set = 0; + } + /* Are we running a total debt that needs to be compensated for? */ + if (bbr->r_ctl.rc_hptsi_agg_delay) { + if (slot > bbr->r_ctl.rc_hptsi_agg_delay) { + /* We nuke the delay */ + slot -= bbr->r_ctl.rc_hptsi_agg_delay; + bbr->r_ctl.rc_hptsi_agg_delay = 0; + } else { + /* We nuke some of the delay, put in a minimal 100usecs */ + bbr->r_ctl.rc_hptsi_agg_delay -= slot; + bbr->r_ctl.rc_last_delay_val = slot = 100; + } + } + bbr->r_ctl.rc_last_delay_val = slot; + hpts_timeout = bbr_timer_start(tp, bbr, cts); + if (tp->t_flags & TF_DELACK) { + if (bbr->rc_in_persist == 0) { + delayed_ack = bbr_delack_time; + } else { + /* + * We are in persists and have + * gotten a new data element. + */ + if (hpts_timeout > bbr_delack_time) { + /* + * Lets make the persists timer (which acks) + * be the smaller of hpts_timeout and bbr_delack_time. + */ + hpts_timeout = bbr_delack_time; + } + } + } + if (delayed_ack && + ((hpts_timeout == 0) || + (delayed_ack < hpts_timeout))) { + /* We need a Delayed ack timer */ + bbr->r_ctl.rc_hpts_flags = PACE_TMR_DELACK; + hpts_timeout = delayed_ack; + } + if (slot) { + /* Mark that we have a pacing timer up */ + BBR_STAT_INC(bbr_paced_segments); + bbr->r_ctl.rc_hpts_flags |= PACE_PKT_OUTPUT; + } + /* + * If no timers are going to run and we will fall off thfe hptsi + * wheel, we resort to a keep-alive timer if its configured. + */ + if ((hpts_timeout == 0) && + (slot == 0)) { + if ((tcp_always_keepalive || inp->inp_socket->so_options & SO_KEEPALIVE) && + (tp->t_state <= TCPS_CLOSING)) { + /* + * Ok we have no timer (persists, rack, tlp, rxt or + * del-ack), we don't have segments being paced. So + * all that is left is the keepalive timer. + */ + if (TCPS_HAVEESTABLISHED(tp->t_state)) { + hpts_timeout = TICKS_2_USEC(TP_KEEPIDLE(tp)); + } else { + hpts_timeout = TICKS_2_USEC(TP_KEEPINIT(tp)); + } + bbr->r_ctl.rc_hpts_flags |= PACE_TMR_KEEP; + } + } + if (left && (stopped & (PACE_TMR_KEEP | PACE_TMR_DELACK)) == + (bbr->r_ctl.rc_hpts_flags & PACE_TMR_MASK)) { + /* + * RACK, TLP, persists and RXT timers all are restartable + * based on actions input .. i.e we received a packet (ack + * or sack) and that changes things (rw, or snd_una etc). + * Thus we can restart them with a new value. For + * keep-alive, delayed_ack we keep track of what was left + * and restart the timer with a smaller value. + */ + if (left < hpts_timeout) + hpts_timeout = left; + } + if (bbr->r_ctl.rc_incr_tmrs && slot && + (bbr->r_ctl.rc_hpts_flags & (PACE_TMR_TLP|PACE_TMR_RXT))) { + /* + * If configured to do so, and the timer is either + * the TLP or RXT timer, we need to increase the timeout + * by the pacing time. Consider the bottleneck at my + * machine as an example, we are sending something + * to start a TLP on. The last packet won't be emitted + * fully until the pacing time (the bottleneck will hold + * the data in place). Once the packet is emitted that + * is when we want to start waiting for the TLP. This + * is most evident with hardware pacing (where the nic + * is holding the packet(s) before emitting). But it + * can also show up in the network so we do it for all + * cases. Technically we would take off one packet from + * this extra delay but this is easier and being more + * conservative is probably better. + */ + hpts_timeout += slot; + } + if (hpts_timeout) { + /* + * Hack alert for now we can't time-out over 2147 seconds (a + * bit more than 35min) + */ + if (hpts_timeout > 0x7ffffffe) + hpts_timeout = 0x7ffffffe; + bbr->r_ctl.rc_timer_exp = cts + hpts_timeout; + } else + bbr->r_ctl.rc_timer_exp = 0; + if ((slot) && + (bbr->rc_use_google || + bbr->output_error_seen || + (slot <= hpts_timeout)) ) { + /* + * Tell LRO that it can queue packets while + * we pace. + */ + bbr->rc_inp->inp_flags2 |= INP_MBUF_QUEUE_READY; + if ((bbr->r_ctl.rc_hpts_flags & PACE_TMR_RACK) && + (bbr->rc_cwnd_limited == 0)) { + /* + * If we are not cwnd limited and we + * are running a rack timer we put on + * the do not disturbe even for sack. + */ + inp->inp_flags2 |= INP_DONT_SACK_QUEUE; + } else + inp->inp_flags2 &= ~INP_DONT_SACK_QUEUE; + bbr->rc_pacer_started = cts; + + (void)tcp_hpts_insert_diag(tp->t_inpcb, HPTS_USEC_TO_SLOTS(slot), + __LINE__, &diag); + bbr->rc_timer_first = 0; + bbr->bbr_timer_src = frm; + bbr_log_to_start(bbr, cts, hpts_timeout, slot, 1); + bbr_log_hpts_diag(bbr, cts, &diag); + } else if (hpts_timeout) { + (void)tcp_hpts_insert_diag(tp->t_inpcb, HPTS_USEC_TO_SLOTS(hpts_timeout), + __LINE__, &diag); + /* + * We add the flag here as well if the slot is set, + * since hpts will call in to clear the queue first before + * calling the output routine (which does our timers). + * We don't want to set the flag if its just a timer + * else the arrival of data might (that causes us + * to send more) might get delayed. Imagine being + * on a keep-alive timer and a request comes in for + * more data. + */ + if (slot) + bbr->rc_pacer_started = cts; + if ((bbr->r_ctl.rc_hpts_flags & PACE_TMR_RACK) && + (bbr->rc_cwnd_limited == 0)) { + /* + * For a rack timer, don't wake us even + * if a sack arrives as long as we are + * not cwnd limited. + */ + bbr->rc_inp->inp_flags2 |= INP_MBUF_QUEUE_READY; + inp->inp_flags2 |= INP_DONT_SACK_QUEUE; + } else { + /* All other timers wake us up */ + bbr->rc_inp->inp_flags2 &= ~INP_MBUF_QUEUE_READY; + inp->inp_flags2 &= ~INP_DONT_SACK_QUEUE; + } + bbr->bbr_timer_src = frm; + bbr_log_to_start(bbr, cts, hpts_timeout, slot, 0); + bbr_log_hpts_diag(bbr, cts, &diag); + bbr->rc_timer_first = 1; + } + bbr->rc_tmr_stopped = 0; + bbr_log_type_bbrsnd(bbr, tot_len, slot, delay_calc, cts, frm, prev_delay); +} + +static void +bbr_timer_audit(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts, struct sockbuf *sb) +{ + /* + * We received an ack, and then did not call send or were bounced + * out due to the hpts was running. Now a timer is up as well, is it + * the right timer? + */ + struct inpcb *inp; + struct bbr_sendmap *rsm; + uint32_t hpts_timeout; + int tmr_up; + + tmr_up = bbr->r_ctl.rc_hpts_flags & PACE_TMR_MASK; + if (bbr->rc_in_persist && (tmr_up == PACE_TMR_PERSIT)) + return; + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_tmap); + if (((rsm == NULL) || (tp->t_state < TCPS_ESTABLISHED)) && + (tmr_up == PACE_TMR_RXT)) { + /* Should be an RXT */ + return; + } + inp = bbr->rc_inp; + if (rsm == NULL) { + /* Nothing outstanding? */ + if (tp->t_flags & TF_DELACK) { + if (tmr_up == PACE_TMR_DELACK) + /* + * We are supposed to have delayed ack up + * and we do + */ + return; + } else if (sbavail(&inp->inp_socket->so_snd) && + (tmr_up == PACE_TMR_RXT)) { + /* + * if we hit enobufs then we would expect the + * possiblity of nothing outstanding and the RXT up + * (and the hptsi timer). + */ + return; + } else if (((tcp_always_keepalive || + inp->inp_socket->so_options & SO_KEEPALIVE) && + (tp->t_state <= TCPS_CLOSING)) && + (tmr_up == PACE_TMR_KEEP) && + (tp->snd_max == tp->snd_una)) { + /* We should have keep alive up and we do */ + return; + } + } + if (rsm && (rsm->r_flags & BBR_SACK_PASSED)) { + if ((tp->t_flags & TF_SENTFIN) && + ((tp->snd_max - tp->snd_una) == 1) && + (rsm->r_flags & BBR_HAS_FIN)) { + /* needs to be a RXT */ + if (tmr_up == PACE_TMR_RXT) + return; + else + goto wrong_timer; + } else if (tmr_up == PACE_TMR_RACK) + return; + else + goto wrong_timer; + } else if (rsm && (tmr_up == PACE_TMR_RACK)) { + /* Rack timer has priority if we have data out */ + return; + } else if (SEQ_GT(tp->snd_max, tp->snd_una) && + ((tmr_up == PACE_TMR_TLP) || + (tmr_up == PACE_TMR_RXT))) { + /* + * Either a TLP or RXT is fine if no sack-passed is in place + * and data is outstanding. + */ + return; + } else if (tmr_up == PACE_TMR_DELACK) { + /* + * If the delayed ack was going to go off before the + * rtx/tlp/rack timer were going to expire, then that would + * be the timer in control. Note we don't check the time + * here trusting the code is correct. + */ + return; + } + if (SEQ_GT(tp->snd_max, tp->snd_una) && + ((tmr_up == PACE_TMR_RXT) || + (tmr_up == PACE_TMR_TLP) || + (tmr_up == PACE_TMR_RACK))) { + /* + * We have outstanding data and + * we *do* have a RACK, TLP or RXT + * timer running. We won't restart + * anything here since thats probably ok we + * will get called with some timer here shortly. + */ + return; + } + /* + * Ok the timer originally started is not what we want now. We will + * force the hpts to be stopped if any, and restart with the slot + * set to what was in the saved slot. + */ +wrong_timer: + if ((bbr->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) == 0) { + if (inp->inp_in_hpts) + tcp_hpts_remove(inp, HPTS_REMOVE_OUTPUT); + bbr_timer_cancel(bbr, __LINE__, cts); + bbr_start_hpts_timer(bbr, tp, cts, 1, bbr->r_ctl.rc_last_delay_val, + 0); + } else { + /* + * Output is hptsi so we just need to switch the type of + * timer. We don't bother with keep-alive, since when we + * jump through the output, it will start the keep-alive if + * nothing is sent. + * + * We only need a delayed-ack added and or the hpts_timeout. + */ + hpts_timeout = bbr_timer_start(tp, bbr, cts); + if (tp->t_flags & TF_DELACK) { + if (hpts_timeout == 0) { + hpts_timeout = bbr_delack_time; + bbr->r_ctl.rc_hpts_flags = PACE_TMR_DELACK; + } + else if (hpts_timeout > bbr_delack_time) { + hpts_timeout = bbr_delack_time; + bbr->r_ctl.rc_hpts_flags = PACE_TMR_DELACK; + } + } + if (hpts_timeout) { + if (hpts_timeout > 0x7ffffffe) + hpts_timeout = 0x7ffffffe; + bbr->r_ctl.rc_timer_exp = cts + hpts_timeout; + } + } +} + +int32_t bbr_clear_lost = 0; + +/* + * Considers the two time values now (cts) and earlier. + * If cts is smaller than earlier, we could have + * had a sequence wrap (our counter wraps every + * 70 min or so) or it could be just clock skew + * getting us two differnt time values. Clock skew + * will show up within 10ms or so. So in such + * a case (where cts is behind earlier time by + * less than 10ms) we return 0. Otherwise we + * return the true difference between them. + */ +static inline uint32_t +bbr_calc_time(uint32_t cts, uint32_t earlier_time) { + /* + * Given two timestamps, the current time stamp cts, and some other + * time-stamp taken in theory earlier return the difference. The + * trick is here sometimes locking will get the other timestamp + * after the cts. If this occurs we need to return 0. + */ + if (TSTMP_GEQ(cts, earlier_time)) + return (cts - earlier_time); + /* + * cts is behind earlier_time if its less than 10ms consider it 0. + * If its more than 10ms difference then we had a time wrap. Else + * its just the normal locking foo. I wonder if we should not go to + * 64bit TS and get rid of this issue. + */ + if (TSTMP_GEQ((cts + 10000), earlier_time)) + return (0); + /* + * Ok the time must have wrapped. So we need to answer a large + * amount of time, which the normal subtraction should do. + */ + return (cts - earlier_time); +} + + + +static int +sysctl_bbr_clear_lost(SYSCTL_HANDLER_ARGS) +{ + uint32_t stat; + int32_t error; + + error = SYSCTL_OUT(req, &bbr_clear_lost, sizeof(uint32_t)); + if (error || req->newptr == NULL) + return error; + + error = SYSCTL_IN(req, &stat, sizeof(uint32_t)); + if (error) + return (error); + if (stat == 1) { +#ifdef BBR_INVARIANTS + printf("Clearing BBR lost counters\n"); +#endif + COUNTER_ARRAY_ZERO(bbr_state_lost, BBR_MAX_STAT); + COUNTER_ARRAY_ZERO(bbr_state_time, BBR_MAX_STAT); + COUNTER_ARRAY_ZERO(bbr_state_resend, BBR_MAX_STAT); + } else if (stat == 2) { +#ifdef BBR_INVARIANTS + printf("Clearing BBR option counters\n"); +#endif + COUNTER_ARRAY_ZERO(bbr_opts_arry, BBR_OPTS_SIZE); + } else if (stat == 3) { +#ifdef BBR_INVARIANTS + printf("Clearing BBR stats counters\n"); +#endif + COUNTER_ARRAY_ZERO(bbr_stat_arry, BBR_STAT_SIZE); + } else if (stat == 4) { +#ifdef BBR_INVARIANTS + printf("Clearing BBR out-size counters\n"); +#endif + COUNTER_ARRAY_ZERO(bbr_out_size, TCP_MSS_ACCT_SIZE); + } + bbr_clear_lost = 0; + return (0); +} + +static void +bbr_init_sysctls() +{ + struct sysctl_oid *bbr_probertt; + struct sysctl_oid *bbr_hptsi; + struct sysctl_oid *bbr_measure; + struct sysctl_oid *bbr_cwnd; + struct sysctl_oid *bbr_timeout; + struct sysctl_oid *bbr_states; + struct sysctl_oid *bbr_startup; + struct sysctl_oid *bbr_policer; + + /* Probe rtt controls */ + bbr_probertt = SYSCTL_ADD_NODE(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, + "probertt", + CTLFLAG_RW, 0, + ""); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "gain", CTLFLAG_RW, + &bbr_rttprobe_gain, 192, + "What is the filter gain drop in probe_rtt (0=disable)?"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "cwnd", CTLFLAG_RW, + &bbr_rtt_probe_cwndtarg, 4, + "How many mss's are outstanding during probe-rtt"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "int", CTLFLAG_RW, + &bbr_rtt_probe_limit, 4000000, + "If RTT has not shrank in this many micro-seconds enter probe-rtt"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "mintime", CTLFLAG_RW, + &bbr_rtt_probe_time, 200000, + "How many microseconds in probe-rtt"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "filter_len_sec", CTLFLAG_RW, + &bbr_filter_len_sec, 6, + "How long in seconds does the rttProp filter run?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "drain_rtt", CTLFLAG_RW, + &bbr_drain_rtt, BBR_SRTT, + "What is the drain rtt to use in probeRTT (rtt_prop=0, rtt_rack=1, rtt_pkt=2, rtt_srtt=3?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "can_force", CTLFLAG_RW, + &bbr_can_force_probertt, 0, + "If we keep setting new low rtt's but delay going in probe-rtt can we force in??"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "enter_sets_force", CTLFLAG_RW, + &bbr_probertt_sets_rtt, 0, + "In NF mode, do we imitate google_mode and set the rttProp on entry to probe-rtt?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "can_adjust", CTLFLAG_RW, + &bbr_can_adjust_probertt, 1, + "Can we dynamically adjust the probe-rtt limits and times?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "is_ratio", CTLFLAG_RW, + &bbr_is_ratio, 0, + "is the limit to filter a ratio?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "use_cwnd", CTLFLAG_RW, + &bbr_prtt_slam_cwnd, 0, + "Should we set/recover cwnd?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_probertt), + OID_AUTO, "can_use_ts", CTLFLAG_RW, + &bbr_can_use_ts_for_rtt, 1, + "Can we use the ms timestamp if available for retransmistted rtt calculations?"); + + /* Pacing controls */ + bbr_hptsi = SYSCTL_ADD_NODE(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, + "pacing", + CTLFLAG_RW, 0, + ""); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "hw_pacing", CTLFLAG_RW, + &bbr_allow_hdwr_pacing, 1, + "Do we allow hardware pacing?"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "hw_pacing_limit", CTLFLAG_RW, + &bbr_hardware_pacing_limit, 4000, + "Do we have a limited number of connections for pacing chelsio (0=no limit)?"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "hw_pacing_adj", CTLFLAG_RW, + &bbr_hdwr_pace_adjust, 2, + "Multiplier to calculated tso size?"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "hw_pacing_floor", CTLFLAG_RW, + &bbr_hdwr_pace_floor, 1, + "Do we invoke the hardware pacing floor?"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "hw_pacing_delay_cnt", CTLFLAG_RW, + &bbr_hdwr_pacing_delay_cnt, 10, + "How many packets must be sent after hdwr pacing is enabled"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "bw_cross", CTLFLAG_RW, + &bbr_cross_over, 3000000, + "What is the point where we cross over to linux like TSO size set"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "seg_deltarg", CTLFLAG_RW, + &bbr_hptsi_segments_delay_tar, 7000, + "What is the worse case delay target for hptsi < 48Mbp connections"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "enet_oh", CTLFLAG_RW, + &bbr_include_enet_oh, 0, + "Do we include the ethernet overhead in calculating pacing delay?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "ip_oh", CTLFLAG_RW, + &bbr_include_ip_oh, 1, + "Do we include the IP overhead in calculating pacing delay?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "tcp_oh", CTLFLAG_RW, + &bbr_include_tcp_oh, 0, + "Do we include the TCP overhead in calculating pacing delay?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "google_discount", CTLFLAG_RW, + &bbr_google_discount, 10, + "What is the default google discount percentage wise for pacing (11 = 1.1%%)?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "all_get_min", CTLFLAG_RW, + &bbr_all_get_min, 0, + "If you are less than a MSS do you just get the min?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "tso_min", CTLFLAG_RW, + &bbr_hptsi_bytes_min, 1460, + "For 0 -> 24Mbps what is floor number of segments for TSO"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "seg_tso_max", CTLFLAG_RW, + &bbr_hptsi_segments_max, 6, + "For 0 -> 24Mbps what is top number of segments for TSO"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "seg_floor", CTLFLAG_RW, + &bbr_hptsi_segments_floor, 1, + "Minimum TSO size we will fall too in segments"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "utter_max", CTLFLAG_RW, + &bbr_hptsi_utter_max, 0, + "The absolute maximum that any pacing (outside of hardware) can be"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "seg_divisor", CTLFLAG_RW, + &bbr_hptsi_per_second, 100, + "What is the divisor in our hptsi TSO calculation 512Mbps < X > 24Mbps "); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "srtt_mul", CTLFLAG_RW, + &bbr_hptsi_max_mul, 1, + "The multiplier for pace len max"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_hptsi), + OID_AUTO, "srtt_div", CTLFLAG_RW, + &bbr_hptsi_max_div, 2, + "The divisor for pace len max"); + /* Measurement controls */ + bbr_measure = SYSCTL_ADD_NODE(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, + "measure", + CTLFLAG_RW, 0, + "Measurement controls"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "min_i_bw", CTLFLAG_RW, + &bbr_initial_bw_bps, 62500, + "Minimum initial b/w in bytes per second"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "no_sack_needed", CTLFLAG_RW, + &bbr_sack_not_required, 0, + "Do we allow bbr to run on connections not supporting SACK?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "use_google", CTLFLAG_RW, + &bbr_use_google_algo, 0, + "Use has close to google V1.0 has possible?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "ts_limiting", CTLFLAG_RW, + &bbr_ts_limiting, 1, + "Do we attempt to use the peers timestamp to limit b/w caculations?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "ts_can_raise", CTLFLAG_RW, + &bbr_ts_can_raise, 0, + "Can we raise the b/w via timestamp b/w calculation?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "ts_delta", CTLFLAG_RW, + &bbr_min_usec_delta, 20000, + "How long in usec between ts of our sends in ts validation code?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "ts_peer_delta", CTLFLAG_RW, + &bbr_min_peer_delta, 20, + "What min numerical value should be between the peer deltas?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "ts_delta_percent", CTLFLAG_RW, + &bbr_delta_percent, 150, + "What percentage (150 = 15.0) do we allow variance for?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "min_measure_good_bw", CTLFLAG_RW, + &bbr_min_measurements_req, 1, + "What is the minimum measurment count we need before we switch to our b/w estimate"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "min_measure_before_pace", CTLFLAG_RW, + &bbr_no_pacing_until, 4, + "How many pkt-epoch's (0 is off) do we need before pacing is on?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "quanta", CTLFLAG_RW, + &bbr_quanta, 2, + "Extra quanta to add when calculating the target (ID section 4.2.3.2)."); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_measure), + OID_AUTO, "noretran", CTLFLAG_RW, + &bbr_no_retran, 0, + "Should google mode not use retransmission measurements for the b/w estimation?"); + /* State controls */ + bbr_states = SYSCTL_ADD_NODE(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, + "states", + CTLFLAG_RW, 0, + "State controls"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "idle_restart", CTLFLAG_RW, + &bbr_uses_idle_restart, 0, + "Do we use a new special idle_restart state to ramp back up quickly?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "idle_restart_threshold", CTLFLAG_RW, + &bbr_idle_restart_threshold, 100000, + "How long must we be idle before we restart??"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "use_pkt_epoch", CTLFLAG_RW, + &bbr_state_is_pkt_epoch, 0, + "Do we use a pkt-epoch for substate if 0 rttProp?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "startup_rtt_gain", CTLFLAG_RW, + &bbr_rtt_gain_thresh, 0, + "What increase in RTT triggers us to stop ignoring no-loss and possibly exit startup?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "drain_floor", CTLFLAG_RW, + &bbr_drain_floor, 88, + "What is the lowest we can drain (pg) too?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "drain_2_target", CTLFLAG_RW, + &bbr_state_drain_2_tar, 1, + "Do we drain to target in drain substate?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "gain_2_target", CTLFLAG_RW, + &bbr_gain_to_target, 1, + "Does probe bw gain to target??"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "gain_extra_time", CTLFLAG_RW, + &bbr_gain_gets_extra_too, 1, + "Does probe bw gain get the extra time too?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "ld_div", CTLFLAG_RW, + &bbr_drain_drop_div, 5, + "Long drain drop divider?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "ld_mul", CTLFLAG_RW, + &bbr_drain_drop_mul, 4, + "Long drain drop multiplier?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "rand_ot_disc", CTLFLAG_RW, + &bbr_rand_ot, 50, + "Random discount of the ot?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "dr_filter_life", CTLFLAG_RW, + &bbr_num_pktepo_for_del_limit, BBR_NUM_RTTS_FOR_DEL_LIMIT, + "How many packet-epochs does the b/w delivery rate last?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "subdrain_applimited", CTLFLAG_RW, + &bbr_sub_drain_app_limit, 0, + "Does our sub-state drain invoke app limited if its long?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "use_cwnd_subdrain", CTLFLAG_RW, + &bbr_sub_drain_slam_cwnd, 0, + "Should we set/recover cwnd for sub-state drain?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "use_cwnd_maindrain", CTLFLAG_RW, + &bbr_slam_cwnd_in_main_drain, 0, + "Should we set/recover cwnd for main-state drain?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "google_gets_earlyout", CTLFLAG_RW, + &google_allow_early_out, 1, + "Should we allow google probe-bw/drain to exit early at flight target?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_states), + OID_AUTO, "google_exit_loss", CTLFLAG_RW, + &google_consider_lost, 1, + "Should we have losses exit gain of probebw in google mode??"); + /* Startup controls */ + bbr_startup = SYSCTL_ADD_NODE(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, + "startup", + CTLFLAG_RW, 0, + "Startup controls"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_startup), + OID_AUTO, "cheat_iwnd", CTLFLAG_RW, + &bbr_sends_full_iwnd, 1, + "Do we not pace but burst out initial windows has our TSO size?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_startup), + OID_AUTO, "loss_threshold", CTLFLAG_RW, + &bbr_startup_loss_thresh, 2000, + "In startup what is the loss threshold in a pe that will exit us from startup?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_startup), + OID_AUTO, "use_lowerpg", CTLFLAG_RW, + &bbr_use_lower_gain_in_startup, 1, + "Should we use a lower hptsi gain if we see loss in startup?"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_startup), + OID_AUTO, "gain", CTLFLAG_RW, + &bbr_start_exit, 25, + "What gain percent do we need to see to stay in startup??"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_startup), + OID_AUTO, "low_gain", CTLFLAG_RW, + &bbr_low_start_exit, 15, + "What gain percent do we need to see to stay in the lower gain startup??"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_startup), + OID_AUTO, "loss_exit", CTLFLAG_RW, + &bbr_exit_startup_at_loss, 1, + "Should we exit startup at loss in an epoch if we are not gaining?"); + /* CWND controls */ + bbr_cwnd = SYSCTL_ADD_NODE(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, + "cwnd", + CTLFLAG_RW, 0, + "Cwnd controls"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "tar_rtt", CTLFLAG_RW, + &bbr_cwndtarget_rtt_touse, 0, + "Target cwnd rtt measurment to use (0=rtt_prop, 1=rtt_rack, 2=pkt_rtt, 3=srtt)?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "may_shrink", CTLFLAG_RW, + &bbr_cwnd_may_shrink, 0, + "Can the cwnd shrink if it would grow to more than the target?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "max_target_limit", CTLFLAG_RW, + &bbr_target_cwnd_mult_limit, 8, + "Do we limit the cwnd to some multiple of the cwnd target if cwnd can't shrink 0=no?"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "highspeed_min", CTLFLAG_RW, + &bbr_cwnd_min_val_hs, BBR_HIGHSPEED_NUM_MSS, + "What is the high-speed min cwnd (rttProp under 1ms)"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "lowspeed_min", CTLFLAG_RW, + &bbr_cwnd_min_val, BBR_PROBERTT_NUM_MSS, + "What is the min cwnd (rttProp > 1ms)"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "initwin", CTLFLAG_RW, + &bbr_def_init_win, 10, + "What is the BBR initial window, if 0 use tcp version"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "do_loss_red", CTLFLAG_RW, + &bbr_do_red, 600, + "Do we reduce the b/w at exit from recovery based on ratio of prop/srtt (800=80.0, 0=off)?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "red_scale", CTLFLAG_RW, + &bbr_red_scale, 20000, + "What RTT do we scale with?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "red_growslow", CTLFLAG_RW, + &bbr_red_growth_restrict, 1, + "Do we restrict cwnd growth for whats in flight?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "red_div", CTLFLAG_RW, + &bbr_red_div, 2, + "If we reduce whats the divisor?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "red_mul", CTLFLAG_RW, + &bbr_red_mul, 1, + "If we reduce whats the mulitiplier?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "target_is_unit", CTLFLAG_RW, + &bbr_target_is_bbunit, 0, + "Is the state target the pacing_gain or BBR_UNIT?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_cwnd), + OID_AUTO, "drop_limit", CTLFLAG_RW, + &bbr_drop_limit, 0, + "Number of segments limit for drop (0=use min_cwnd w/flight)?"); + + /* Timeout controls */ + bbr_timeout = SYSCTL_ADD_NODE(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, + "timeout", + CTLFLAG_RW, 0, + "Time out controls"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "delack", CTLFLAG_RW, + &bbr_delack_time, 100000, + "BBR's delayed ack time"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "tlp_uses", CTLFLAG_RW, + &bbr_tlp_type_to_use, 3, + "RTT that TLP uses in its calculations, 0=rttProp, 1=Rack_rtt, 2=pkt_rtt and 3=srtt"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "persmin", CTLFLAG_RW, + &bbr_persist_min, 250000, + "What is the minimum time in microseconds between persists"); + SYSCTL_ADD_U32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "persmax", CTLFLAG_RW, + &bbr_persist_max, 1000000, + "What is the largest delay in microseconds between persists"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "tlp_minto", CTLFLAG_RW, + &bbr_tlp_min, 10000, + "TLP Min timeout in usecs"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "tlp_dack_time", CTLFLAG_RW, + &bbr_delayed_ack_time, 200000, + "TLP delayed ack compensation value"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "minrto", CTLFLAG_RW, + &bbr_rto_min_ms, 30, + "Minimum RTO in ms"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "maxrto", CTLFLAG_RW, + &bbr_rto_max_sec, 4, + "Maxiumum RTO in seconds -- should be at least as large as min_rto"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "tlp_retry", CTLFLAG_RW, + &bbr_tlp_max_resend, 2, + "How many times does TLP retry a single segment or multiple with no ACK"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "minto", CTLFLAG_RW, + &bbr_min_to, 1000, + "Minimum rack timeout in useconds"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "pktdelay", CTLFLAG_RW, + &bbr_pkt_delay, 1000, + "Extra RACK time (in useconds) besides reordering thresh"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "incr_tmrs", CTLFLAG_RW, + &bbr_incr_timers, 1, + "Increase the RXT/TLP timer by the pacing time used?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_timeout), + OID_AUTO, "rxtmark_sackpassed", CTLFLAG_RW, + &bbr_marks_rxt_sack_passed, 0, + "Mark sack passed on all those not ack'd when a RXT hits?"); + /* Policer controls */ + bbr_policer = SYSCTL_ADD_NODE(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, + "policer", + CTLFLAG_RW, 0, + "Policer controls"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_policer), + OID_AUTO, "detect_enable", CTLFLAG_RW, + &bbr_policer_detection_enabled, 1, + "Is policer detection enabled??"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_policer), + OID_AUTO, "min_pes", CTLFLAG_RW, + &bbr_lt_intvl_min_rtts, 4, + "Minimum number of PE's?"); + SYSCTL_ADD_U64(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_policer), + OID_AUTO, "bwdiff", CTLFLAG_RW, + &bbr_lt_bw_diff, (4000/8), + "Minimal bw diff?"); + SYSCTL_ADD_U64(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_policer), + OID_AUTO, "bwratio", CTLFLAG_RW, + &bbr_lt_bw_ratio, 8, + "Minimal bw diff?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_policer), + OID_AUTO, "from_rack_rxt", CTLFLAG_RW, + &bbr_policer_call_from_rack_to, 0, + "Do we call the policer detection code from a rack-timeout?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_policer), + OID_AUTO, "false_postive", CTLFLAG_RW, + &bbr_lt_intvl_fp, 0, + "What packet epoch do we do false-postive detection at (0=no)?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_policer), + OID_AUTO, "loss_thresh", CTLFLAG_RW, + &bbr_lt_loss_thresh, 196, + "Loss threshold 196 = 19.6%?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_policer), + OID_AUTO, "false_postive_thresh", CTLFLAG_RW, + &bbr_lt_fd_thresh, 100, + "What percentage is the false detection threshold (150=15.0)?"); + /* All the rest */ + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "cheat_rxt", CTLFLAG_RW, + &bbr_use_rack_resend_cheat, 0, + "Do we burst 1ms between sends on retransmissions (like rack)?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "error_paceout", CTLFLAG_RW, + &bbr_error_base_paceout, 10000, + "When we hit an error what is the min to pace out in usec's?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "kill_paceout", CTLFLAG_RW, + &bbr_max_net_error_cnt, 10, + "When we hit this many errors in a row, kill the session?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "data_after_close", CTLFLAG_RW, + &bbr_ignore_data_after_close, 1, + "Do we hold off sending a RST until all pending data is ack'd"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "resend_use_tso", CTLFLAG_RW, + &bbr_resends_use_tso, 0, + "Can resends use TSO?"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "sblklimit", CTLFLAG_RW, + &bbr_sack_block_limit, 128, + "When do we start ignoring small sack blocks"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "bb_verbose", CTLFLAG_RW, + &bbr_verbose_logging, 0, + "Should BBR black box logging be verbose"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "reorder_thresh", CTLFLAG_RW, + &bbr_reorder_thresh, 2, + "What factor for rack will be added when seeing reordering (shift right)"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "reorder_fade", CTLFLAG_RW, + &bbr_reorder_fade, 0, + "Does reorder detection fade, if so how many ms (0 means never)"); + SYSCTL_ADD_S32(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "rtt_tlp_thresh", CTLFLAG_RW, + &bbr_tlp_thresh, 1, + "what divisor for TLP rtt/retran will be added (1=rtt, 2=1/2 rtt etc)"); + /* Stats and counters */ + /* The pacing counters for hdwr/software can't be in the array */ + bbr_nohdwr_pacing_enobuf = counter_u64_alloc(M_WAITOK); + bbr_hdwr_pacing_enobuf = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "enob_hdwr_pacing", CTLFLAG_RD, + &bbr_hdwr_pacing_enobuf, + "Total number of enobufs for hardware paced flows"); + SYSCTL_ADD_COUNTER_U64(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "enob_no_hdwr_pacing", CTLFLAG_RD, + &bbr_nohdwr_pacing_enobuf, + "Total number of enobufs for non-hardware paced flows"); + + + bbr_flows_whdwr_pacing = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "hdwr_pacing", CTLFLAG_RD, + &bbr_flows_whdwr_pacing, + "Total number of hardware paced flows"); + bbr_flows_nohdwr_pacing = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "software_pacing", CTLFLAG_RD, + &bbr_flows_nohdwr_pacing, + "Total number of software paced flows"); + COUNTER_ARRAY_ALLOC(bbr_stat_arry, BBR_STAT_SIZE, M_WAITOK); + SYSCTL_ADD_COUNTER_U64_ARRAY(&bbr_sysctl_ctx, SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "stats", CTLFLAG_RD, + bbr_stat_arry, BBR_STAT_SIZE, "BBR Stats"); + COUNTER_ARRAY_ALLOC(bbr_opts_arry, BBR_OPTS_SIZE, M_WAITOK); + SYSCTL_ADD_COUNTER_U64_ARRAY(&bbr_sysctl_ctx, SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "opts", CTLFLAG_RD, + bbr_opts_arry, BBR_OPTS_SIZE, "BBR Option Stats"); + COUNTER_ARRAY_ALLOC(bbr_state_lost, BBR_MAX_STAT, M_WAITOK); + SYSCTL_ADD_COUNTER_U64_ARRAY(&bbr_sysctl_ctx, SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "lost", CTLFLAG_RD, + bbr_state_lost, BBR_MAX_STAT, "Stats of when losses occur"); + COUNTER_ARRAY_ALLOC(bbr_state_resend, BBR_MAX_STAT, M_WAITOK); + SYSCTL_ADD_COUNTER_U64_ARRAY(&bbr_sysctl_ctx, SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "stateresend", CTLFLAG_RD, + bbr_state_resend, BBR_MAX_STAT, "Stats of what states resend"); + COUNTER_ARRAY_ALLOC(bbr_state_time, BBR_MAX_STAT, M_WAITOK); + SYSCTL_ADD_COUNTER_U64_ARRAY(&bbr_sysctl_ctx, SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "statetime", CTLFLAG_RD, + bbr_state_time, BBR_MAX_STAT, "Stats of time spent in the states"); + COUNTER_ARRAY_ALLOC(bbr_out_size, TCP_MSS_ACCT_SIZE, M_WAITOK); + SYSCTL_ADD_COUNTER_U64_ARRAY(&bbr_sysctl_ctx, SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "outsize", CTLFLAG_RD, + bbr_out_size, TCP_MSS_ACCT_SIZE, "Size of output calls"); + SYSCTL_ADD_PROC(&bbr_sysctl_ctx, + SYSCTL_CHILDREN(bbr_sysctl_root), + OID_AUTO, "clrlost", CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_MPSAFE, + &bbr_clear_lost, 0, sysctl_bbr_clear_lost, "IU", "Clear lost counters"); +} + +static inline int32_t +bbr_progress_timeout_check(struct tcp_bbr *bbr) +{ + if (bbr->rc_tp->t_maxunacktime && bbr->rc_tp->t_acktime && + TSTMP_GT(ticks, bbr->rc_tp->t_acktime)) { + if ((((uint32_t)ticks - bbr->rc_tp->t_acktime)) >= bbr->rc_tp->t_maxunacktime) { + /* + * There is an assumption here that the caller will + * drop the connection, so we increment the + * statistics. + */ + bbr_log_progress_event(bbr, bbr->rc_tp, ticks, PROGRESS_DROP, __LINE__); + BBR_STAT_INC(bbr_progress_drops); +#ifdef NETFLIX_STATS + TCPSTAT_INC(tcps_progdrops); +#endif + return (1); + } + } + return (0); +} + +static void +bbr_counter_destroy() +{ + COUNTER_ARRAY_FREE(bbr_stat_arry, BBR_STAT_SIZE); + COUNTER_ARRAY_FREE(bbr_opts_arry, BBR_OPTS_SIZE); + COUNTER_ARRAY_FREE(bbr_out_size, TCP_MSS_ACCT_SIZE); + COUNTER_ARRAY_FREE(bbr_state_lost, BBR_MAX_STAT); + COUNTER_ARRAY_FREE(bbr_state_time, BBR_MAX_STAT); + COUNTER_ARRAY_FREE(bbr_state_resend, BBR_MAX_STAT); + counter_u64_free(bbr_flows_whdwr_pacing); + counter_u64_free(bbr_flows_nohdwr_pacing); + +} + +static __inline void +bbr_fill_in_logging_data(struct tcp_bbr *bbr, struct tcp_log_bbr *l, uint32_t cts) +{ + memset(l, 0, sizeof(union tcp_log_stackspecific)); + l->cur_del_rate = bbr->r_ctl.rc_bbr_cur_del_rate; + l->delRate = get_filter_value(&bbr->r_ctl.rc_delrate); + l->rttProp = get_filter_value_small(&bbr->r_ctl.rc_rttprop); + l->bw_inuse = bbr_get_bw(bbr); + l->inflight = ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + l->applimited = bbr->r_ctl.r_app_limited_until; + l->delivered = bbr->r_ctl.rc_delivered; + l->timeStamp = cts; + l->lost = bbr->r_ctl.rc_lost; + l->bbr_state = bbr->rc_bbr_state; + l->bbr_substate = bbr_state_val(bbr); + l->epoch = bbr->r_ctl.rc_rtt_epoch; + l->lt_epoch = bbr->r_ctl.rc_lt_epoch; + l->pacing_gain = bbr->r_ctl.rc_bbr_hptsi_gain; + l->cwnd_gain = bbr->r_ctl.rc_bbr_cwnd_gain; + l->inhpts = bbr->rc_inp->inp_in_hpts; + l->ininput = bbr->rc_inp->inp_in_input; + l->use_lt_bw = bbr->rc_lt_use_bw; + l->pkts_out = bbr->r_ctl.rc_flight_at_input; + l->pkt_epoch = bbr->r_ctl.rc_pkt_epoch; +} + +static void +bbr_log_type_bw_reduce(struct tcp_bbr *bbr, int reason) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, bbr->r_ctl.rc_rcvtime); + log.u_bbr.flex1 = 0; + log.u_bbr.flex2 = 0; + log.u_bbr.flex5 = 0; + log.u_bbr.flex3 = 0; + log.u_bbr.flex4 = bbr->r_ctl.rc_pkt_epoch_loss_rate; + log.u_bbr.flex7 = reason; + log.u_bbr.flex6 = bbr->r_ctl.rc_bbr_enters_probertt; + log.u_bbr.flex8 = 0; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_BW_RED_EV, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_type_rwnd_collapse(struct tcp_bbr *bbr, int seq, int mode, uint32_t count) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, bbr->r_ctl.rc_rcvtime); + log.u_bbr.flex1 = seq; + log.u_bbr.flex2 = count; + log.u_bbr.flex8 = mode; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_LOWGAIN, 0, + 0, &log, false, &bbr->rc_tv); + } +} + + + +static void +bbr_log_type_just_return(struct tcp_bbr *bbr, uint32_t cts, uint32_t tlen, uint8_t hpts_calling, + uint8_t reason, uint32_t p_maxseg, int len) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = p_maxseg; + log.u_bbr.flex2 = bbr->r_ctl.rc_hpts_flags; + log.u_bbr.flex3 = bbr->r_ctl.rc_timer_exp; + log.u_bbr.flex4 = reason; + log.u_bbr.flex5 = bbr->rc_in_persist; + log.u_bbr.flex6 = bbr->r_ctl.rc_last_delay_val; + log.u_bbr.flex7 = p_maxseg; + log.u_bbr.flex8 = bbr->rc_in_persist; + log.u_bbr.pkts_out = 0; + log.u_bbr.applimited = len; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_JUSTRET, 0, + tlen, &log, false, &bbr->rc_tv); + } +} + + +static void +bbr_log_type_enter_rec(struct tcp_bbr *bbr, uint32_t seq) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, bbr->r_ctl.rc_rcvtime); + log.u_bbr.flex1 = seq; + log.u_bbr.flex2 = bbr->r_ctl.rc_cwnd_on_ent; + log.u_bbr.flex3 = bbr->r_ctl.rc_recovery_start; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_ENTREC, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_msgsize_fail(struct tcp_bbr *bbr, struct tcpcb *tp, uint32_t len, uint32_t maxseg, uint32_t mtu, int32_t csum_flags, int32_t tso, uint32_t cts) +{ + if (tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = tso; + log.u_bbr.flex2 = maxseg; + log.u_bbr.flex3 = mtu; + log.u_bbr.flex4 = csum_flags; + TCP_LOG_EVENTP(tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_MSGSIZE, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_flowend(struct tcp_bbr *bbr) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + struct sockbuf *r, *s; + struct timeval tv; + + if (bbr->rc_inp->inp_socket) { + r = &bbr->rc_inp->inp_socket->so_rcv; + s = &bbr->rc_inp->inp_socket->so_snd; + } else { + r = s = NULL; + } + bbr_fill_in_logging_data(bbr, &log.u_bbr, tcp_get_usecs(&tv)); + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + r, s, + TCP_LOG_FLOWEND, 0, + 0, &log, false, &tv); + } +} + +static void +bbr_log_pkt_epoch(struct tcp_bbr *bbr, uint32_t cts, uint32_t line, + uint32_t lost, uint32_t del) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = lost; + log.u_bbr.flex2 = del; + log.u_bbr.flex3 = bbr->r_ctl.rc_bbr_lastbtlbw; + log.u_bbr.flex4 = bbr->r_ctl.rc_pkt_epoch_rtt; + log.u_bbr.flex5 = bbr->r_ctl.rc_bbr_last_startup_epoch; + log.u_bbr.flex6 = bbr->r_ctl.rc_lost_at_startup; + log.u_bbr.flex7 = line; + log.u_bbr.flex8 = 0; + log.u_bbr.inflight = bbr->r_ctl.r_measurement_count; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_PKT_EPOCH, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_time_epoch(struct tcp_bbr *bbr, uint32_t cts, uint32_t line, uint32_t epoch_time) +{ + if (bbr_verbose_logging && (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF)) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = bbr->r_ctl.rc_lost; + log.u_bbr.flex2 = bbr->rc_inp->inp_socket->so_snd.sb_lowat; + log.u_bbr.flex3 = bbr->rc_inp->inp_socket->so_snd.sb_hiwat; + log.u_bbr.flex7 = line; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_TIME_EPOCH, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_set_of_state_target(struct tcp_bbr *bbr, uint32_t new_tar, int line, int meth) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, bbr->r_ctl.rc_rcvtime); + log.u_bbr.flex1 = bbr->r_ctl.rc_target_at_state; + log.u_bbr.flex2 = new_tar; + log.u_bbr.flex3 = line; + log.u_bbr.flex4 = bbr->r_ctl.rc_pace_max_segs; + log.u_bbr.flex5 = bbr_quanta; + log.u_bbr.flex6 = bbr->r_ctl.rc_pace_min_segs; + log.u_bbr.flex7 = bbr->rc_last_options; + log.u_bbr.flex8 = meth; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_STATE_TARGET, 0, + 0, &log, false, &bbr->rc_tv); + } + +} + +static void +bbr_log_type_statechange(struct tcp_bbr *bbr, uint32_t cts, int32_t line) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = line; + log.u_bbr.flex2 = bbr->r_ctl.rc_rtt_shrinks; + log.u_bbr.flex3 = bbr->r_ctl.rc_probertt_int; + if (bbr_state_is_pkt_epoch) + log.u_bbr.flex4 = bbr_get_rtt(bbr, BBR_RTT_PKTRTT); + else + log.u_bbr.flex4 = bbr_get_rtt(bbr, BBR_RTT_PROP); + log.u_bbr.flex5 = bbr->r_ctl.rc_bbr_last_startup_epoch; + log.u_bbr.flex6 = bbr->r_ctl.rc_lost_at_startup; + log.u_bbr.flex7 = (bbr->r_ctl.rc_target_at_state/1000); + log.u_bbr.lt_epoch = bbr->r_ctl.rc_level_state_extra; + log.u_bbr.pkts_out = bbr->r_ctl.rc_target_at_state; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_STATE, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_rtt_shrinks(struct tcp_bbr *bbr, uint32_t cts, uint32_t applied, + uint32_t rtt, uint32_t line, uint8_t reas, uint16_t cond) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = line; + log.u_bbr.flex2 = bbr->r_ctl.rc_rtt_shrinks; + log.u_bbr.flex3 = bbr->r_ctl.last_in_probertt; + log.u_bbr.flex4 = applied; + log.u_bbr.flex5 = rtt; + log.u_bbr.flex6 = bbr->r_ctl.rc_target_at_state; + log.u_bbr.flex7 = cond; + log.u_bbr.flex8 = reas; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_RTT_SHRINKS, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_type_exit_rec(struct tcp_bbr *bbr) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, bbr->r_ctl.rc_rcvtime); + log.u_bbr.flex1 = bbr->r_ctl.rc_recovery_start; + log.u_bbr.flex2 = bbr->r_ctl.rc_cwnd_on_ent; + log.u_bbr.flex5 = bbr->r_ctl.rc_target_at_state; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_EXITREC, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_type_cwndupd(struct tcp_bbr *bbr, uint32_t bytes_this_ack, uint32_t chg, + uint32_t prev_acked, int32_t meth, uint32_t target, uint32_t th_ack, int32_t line) +{ + if (bbr_verbose_logging && (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF)) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, bbr->r_ctl.rc_rcvtime); + log.u_bbr.flex1 = line; + log.u_bbr.flex2 = prev_acked; + log.u_bbr.flex3 = bytes_this_ack; + log.u_bbr.flex4 = chg; + log.u_bbr.flex5 = th_ack; + log.u_bbr.flex6 = target; + log.u_bbr.flex8 = meth; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_CWND, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_rtt_sample(struct tcp_bbr *bbr, uint32_t rtt, uint32_t tsin) +{ + /* + * Log the rtt sample we are applying to the srtt algorithm in + * useconds. + */ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, bbr->r_ctl.rc_rcvtime); + log.u_bbr.flex1 = rtt; + log.u_bbr.flex2 = bbr->r_ctl.rc_bbr_state_time; + log.u_bbr.flex3 = bbr->r_ctl.rc_ack_hdwr_delay; + log.u_bbr.flex4 = bbr->rc_tp->ts_offset; + log.u_bbr.flex5 = bbr->r_ctl.rc_target_at_state; + log.u_bbr.pkts_out = tcp_tv_to_mssectick(&bbr->rc_tv); + log.u_bbr.flex6 = tsin; + log.u_bbr.flex7 = 0; + log.u_bbr.flex8 = bbr->rc_ack_was_delayed; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + TCP_LOG_RTT, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_type_pesist(struct tcp_bbr *bbr, uint32_t cts, uint32_t time_in, int32_t line, uint8_t enter_exit) +{ + if (bbr_verbose_logging && (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF)) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = time_in; + log.u_bbr.flex2 = line; + log.u_bbr.flex8 = enter_exit; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_PERSIST, 0, + 0, &log, false, &bbr->rc_tv); + } +} +static void +bbr_log_ack_clear(struct tcp_bbr *bbr, uint32_t cts) +{ + if (bbr_verbose_logging && (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF)) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = bbr->rc_tp->ts_recent_age; + log.u_bbr.flex2 = bbr->r_ctl.rc_rtt_shrinks; + log.u_bbr.flex3 = bbr->r_ctl.rc_probertt_int; + log.u_bbr.flex4 = bbr->r_ctl.rc_went_idle_time; + log.u_bbr.flex5 = bbr->r_ctl.rc_target_at_state; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_ACKCLEAR, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_ack_event(struct tcp_bbr *bbr, struct tcphdr *th, struct tcpopt *to, uint32_t tlen, + uint16_t nsegs, uint32_t cts, int32_t nxt_pkt, struct mbuf *m) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + struct timeval tv; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = nsegs; + log.u_bbr.flex2 = bbr->r_ctl.rc_lost_bytes; + if (m) { + struct timespec ts; + + log.u_bbr.flex3 = m->m_flags; + if (m->m_flags & M_TSTMP) { + mbuf_tstmp2timespec(m, &ts); + tv.tv_sec = ts.tv_sec; + tv.tv_usec = ts.tv_nsec / 1000; + log.u_bbr.lt_epoch = tcp_tv_to_usectick(&tv); + } else { + log.u_bbr.lt_epoch = 0; + } + if (m->m_flags & M_TSTMP_LRO) { + tv.tv_sec = m->m_pkthdr.rcv_tstmp / 1000000000; + tv.tv_usec = (m->m_pkthdr.rcv_tstmp % 1000000000) / 1000; + log.u_bbr.flex5 = tcp_tv_to_usectick(&tv); + } else { + /* No arrival timestamp */ + log.u_bbr.flex5 = 0; + } + + log.u_bbr.pkts_out = tcp_get_usecs(&tv); + } else { + log.u_bbr.flex3 = 0; + log.u_bbr.flex5 = 0; + log.u_bbr.flex6 = 0; + log.u_bbr.pkts_out = 0; + } + log.u_bbr.flex4 = bbr->r_ctl.rc_target_at_state; + log.u_bbr.flex7 = bbr->r_wanted_output; + log.u_bbr.flex8 = bbr->rc_in_persist; + TCP_LOG_EVENTP(bbr->rc_tp, th, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + TCP_LOG_IN, 0, + tlen, &log, true, &bbr->rc_tv); + } +} + +static void +bbr_log_doseg_done(struct tcp_bbr *bbr, uint32_t cts, int32_t nxt_pkt, int32_t did_out) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = did_out; + log.u_bbr.flex2 = nxt_pkt; + log.u_bbr.flex3 = bbr->r_ctl.rc_last_delay_val; + log.u_bbr.flex4 = bbr->r_ctl.rc_hpts_flags; + log.u_bbr.flex5 = bbr->r_ctl.rc_timer_exp; + log.u_bbr.flex6 = bbr->r_ctl.rc_lost_bytes; + log.u_bbr.flex7 = bbr->r_wanted_output; + log.u_bbr.flex8 = bbr->rc_in_persist; + log.u_bbr.pkts_out = bbr->r_ctl.highest_hdwr_delay; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_DOSEG_DONE, 0, + 0, &log, true, &bbr->rc_tv); + } +} + +static void +bbr_log_enobuf_jmp(struct tcp_bbr *bbr, uint32_t len, uint32_t cts, + int32_t line, uint32_t o_len, uint32_t segcnt, uint32_t segsiz) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = line; + log.u_bbr.flex2 = o_len; + log.u_bbr.flex3 = segcnt; + log.u_bbr.flex4 = segsiz; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_ENOBUF_JMP, ENOBUFS, + len, &log, true, &bbr->rc_tv); + } +} + +static void +bbr_log_to_processing(struct tcp_bbr *bbr, uint32_t cts, int32_t ret, int32_t timers, uint8_t hpts_calling) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = timers; + log.u_bbr.flex2 = ret; + log.u_bbr.flex3 = bbr->r_ctl.rc_timer_exp; + log.u_bbr.flex4 = bbr->r_ctl.rc_hpts_flags; + log.u_bbr.flex5 = cts; + log.u_bbr.flex6 = bbr->r_ctl.rc_target_at_state; + log.u_bbr.flex8 = hpts_calling; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_TO_PROCESS, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_to_event(struct tcp_bbr *bbr, uint32_t cts, int32_t to_num) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + uint64_t ar; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = bbr->bbr_timer_src; + log.u_bbr.flex2 = 0; + log.u_bbr.flex3 = bbr->r_ctl.rc_hpts_flags; + ar = (uint64_t)(bbr->r_ctl.rc_resend); + ar >>= 32; + ar &= 0x00000000ffffffff; + log.u_bbr.flex4 = (uint32_t)ar; + ar = (uint64_t)bbr->r_ctl.rc_resend; + ar &= 0x00000000ffffffff; + log.u_bbr.flex5 = (uint32_t)ar; + log.u_bbr.flex6 = TICKS_2_USEC(bbr->rc_tp->t_rxtcur); + log.u_bbr.flex8 = to_num; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_RTO, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_startup_event(struct tcp_bbr *bbr, uint32_t cts, uint32_t flex1, uint32_t flex2, uint32_t flex3, uint8_t reason) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = flex1; + log.u_bbr.flex2 = flex2; + log.u_bbr.flex3 = flex3; + log.u_bbr.flex4 = 0; + log.u_bbr.flex5 = bbr->r_ctl.rc_target_at_state; + log.u_bbr.flex6 = bbr->r_ctl.rc_lost_at_startup; + log.u_bbr.flex8 = reason; + log.u_bbr.cur_del_rate = bbr->r_ctl.rc_bbr_lastbtlbw; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_REDUCE, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_hpts_diag(struct tcp_bbr *bbr, uint32_t cts, struct hpts_diag *diag) +{ + if (bbr_verbose_logging && (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF)) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = diag->p_nxt_slot; + log.u_bbr.flex2 = diag->p_cur_slot; + log.u_bbr.flex3 = diag->slot_req; + log.u_bbr.flex4 = diag->inp_hptsslot; + log.u_bbr.flex5 = diag->slot_remaining; + log.u_bbr.flex6 = diag->need_new_to; + log.u_bbr.flex7 = diag->p_hpts_active; + log.u_bbr.flex8 = diag->p_on_min_sleep; + /* Hijack other fields as needed */ + log.u_bbr.epoch = diag->have_slept; + log.u_bbr.lt_epoch = diag->yet_to_sleep; + log.u_bbr.pkts_out = diag->co_ret; + log.u_bbr.applimited = diag->hpts_sleep_time; + log.u_bbr.delivered = diag->p_prev_slot; + log.u_bbr.inflight = diag->p_runningtick; + log.u_bbr.bw_inuse = diag->wheel_tick; + log.u_bbr.rttProp = diag->wheel_cts; + log.u_bbr.delRate = diag->maxticks; + log.u_bbr.cur_del_rate = diag->p_curtick; + log.u_bbr.cur_del_rate <<= 32; + log.u_bbr.cur_del_rate |= diag->p_lasttick; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_HPTSDIAG, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_timer_var(struct tcp_bbr *bbr, int mode, uint32_t cts, uint32_t time_since_sent, uint32_t srtt, + uint32_t thresh, uint32_t to) +{ + if (bbr_verbose_logging && (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF)) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = bbr->rc_tp->t_rttvar; + log.u_bbr.flex2 = time_since_sent; + log.u_bbr.flex3 = srtt; + log.u_bbr.flex4 = thresh; + log.u_bbr.flex5 = to; + log.u_bbr.flex6 = bbr->rc_tp->t_srtt; + log.u_bbr.flex8 = mode; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_TIMERPREP, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_pacing_delay_calc(struct tcp_bbr *bbr, uint16_t gain, uint32_t len, + uint32_t cts, uint32_t usecs, uint64_t bw, uint32_t override, int mod) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = usecs; + log.u_bbr.flex2 = len; + log.u_bbr.flex3 = (uint32_t)((bw >> 32) & 0x00000000ffffffff); + log.u_bbr.flex4 = (uint32_t)(bw & 0x00000000ffffffff); + if (override) + log.u_bbr.flex5 = (1 << 2); + else + log.u_bbr.flex5 = 0; + log.u_bbr.flex6 = override; + log.u_bbr.flex7 = gain; + log.u_bbr.flex8 = mod; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_HPTSI_CALC, 0, + len, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_to_start(struct tcp_bbr *bbr, uint32_t cts, uint32_t to, int32_t slot, uint8_t which) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + + log.u_bbr.flex1 = bbr->bbr_timer_src; + log.u_bbr.flex2 = to; + log.u_bbr.flex3 = bbr->r_ctl.rc_hpts_flags; + log.u_bbr.flex4 = slot; + log.u_bbr.flex5 = bbr->rc_inp->inp_hptsslot; + log.u_bbr.flex6 = TICKS_2_USEC(bbr->rc_tp->t_rxtcur); + log.u_bbr.pkts_out = bbr->rc_inp->inp_flags2; + log.u_bbr.flex8 = which; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_TIMERSTAR, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_thresh_choice(struct tcp_bbr *bbr, uint32_t cts, uint32_t thresh, uint32_t lro, uint32_t srtt, struct bbr_sendmap *rsm, uint8_t frm) +{ + if (bbr_verbose_logging && (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF)) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = thresh; + log.u_bbr.flex2 = lro; + log.u_bbr.flex3 = bbr->r_ctl.rc_reorder_ts; + log.u_bbr.flex4 = rsm->r_tim_lastsent[(rsm->r_rtr_cnt - 1)]; + log.u_bbr.flex5 = TICKS_2_USEC(bbr->rc_tp->t_rxtcur); + log.u_bbr.flex6 = srtt; + log.u_bbr.flex7 = bbr->r_ctl.rc_reorder_shift; + log.u_bbr.flex8 = frm; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_THRESH_CALC, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_to_cancel(struct tcp_bbr *bbr, int32_t line, uint32_t cts, uint8_t hpts_removed) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = line; + log.u_bbr.flex2 = bbr->bbr_timer_src; + log.u_bbr.flex3 = bbr->r_ctl.rc_hpts_flags; + log.u_bbr.flex4 = bbr->rc_in_persist; + log.u_bbr.flex5 = bbr->r_ctl.rc_target_at_state; + log.u_bbr.flex6 = TICKS_2_USEC(bbr->rc_tp->t_rxtcur); + log.u_bbr.flex8 = hpts_removed; + log.u_bbr.pkts_out = bbr->rc_pacer_started; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_TIMERCANC, 0, + 0, &log, false, &bbr->rc_tv); + } +} + + +static void +bbr_log_tstmp_validation(struct tcp_bbr *bbr, uint64_t peer_delta, uint64_t delta) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, bbr->r_ctl.rc_rcvtime); + log.u_bbr.flex1 = bbr->r_ctl.bbr_peer_tsratio; + log.u_bbr.flex2 = (peer_delta >> 32); + log.u_bbr.flex3 = (peer_delta & 0x00000000ffffffff); + log.u_bbr.flex4 = (delta >> 32); + log.u_bbr.flex5 = (delta & 0x00000000ffffffff); + log.u_bbr.flex7 = bbr->rc_ts_clock_set; + log.u_bbr.flex8 = bbr->rc_ts_cant_be_used; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_TSTMP_VAL, 0, + 0, &log, false, &bbr->rc_tv); + + } +} + +static void +bbr_log_type_tsosize(struct tcp_bbr *bbr, uint32_t cts, uint32_t tsosz, uint32_t tls, uint32_t old_val, uint32_t maxseg, int hdwr) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = tsosz; + log.u_bbr.flex2 = tls; + log.u_bbr.flex3 = tcp_min_hptsi_time; + log.u_bbr.flex4 = bbr->r_ctl.bbr_hptsi_bytes_min; + log.u_bbr.flex5 = old_val; + log.u_bbr.flex6 = maxseg; + log.u_bbr.flex7 = bbr->rc_no_pacing; + log.u_bbr.flex7 <<= 1; + log.u_bbr.flex7 |= bbr->rc_past_init_win; + if (hdwr) + log.u_bbr.flex8 = 0x80 | bbr->rc_use_google; + else + log.u_bbr.flex8 = bbr->rc_use_google; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_BBRTSO, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_type_rsmclear(struct tcp_bbr *bbr, uint32_t cts, struct bbr_sendmap *rsm, + uint32_t flags, uint32_t line) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = line; + log.u_bbr.flex2 = rsm->r_start; + log.u_bbr.flex3 = rsm->r_end; + log.u_bbr.flex4 = rsm->r_delivered; + log.u_bbr.flex5 = rsm->r_rtr_cnt; + log.u_bbr.flex6 = rsm->r_dupack; + log.u_bbr.flex7 = rsm->r_tim_lastsent[0]; + log.u_bbr.flex8 = rsm->r_flags; + /* Hijack the pkts_out fids */ + log.u_bbr.applimited = flags; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_RSM_CLEARED, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_type_bbrupd(struct tcp_bbr *bbr, uint8_t flex8, uint32_t cts, + uint32_t flex3, uint32_t flex2, uint32_t flex5, + uint32_t flex6, uint32_t pkts_out, int flex7, + uint32_t flex4, uint32_t flex1) +{ + + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = flex1; + log.u_bbr.flex2 = flex2; + log.u_bbr.flex3 = flex3; + log.u_bbr.flex4 = flex4; + log.u_bbr.flex5 = flex5; + log.u_bbr.flex6 = flex6; + log.u_bbr.flex7 = flex7; + /* Hijack the pkts_out fids */ + log.u_bbr.pkts_out = pkts_out; + log.u_bbr.flex8 = flex8; + if (bbr->rc_ack_was_delayed) + log.u_bbr.epoch = bbr->r_ctl.rc_ack_hdwr_delay; + else + log.u_bbr.epoch = 0; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_BBRUPD, 0, + flex2, &log, false, &bbr->rc_tv); + } +} + + +static void +bbr_log_type_ltbw(struct tcp_bbr *bbr, uint32_t cts, int32_t reason, + uint32_t newbw, uint32_t obw, uint32_t diff, + uint32_t tim) +{ + if (/*bbr_verbose_logging && */(bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF)) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = reason; + log.u_bbr.flex2 = newbw; + log.u_bbr.flex3 = obw; + log.u_bbr.flex4 = diff; + log.u_bbr.flex5 = bbr->r_ctl.rc_lt_lost; + log.u_bbr.flex6 = bbr->r_ctl.rc_lt_del; + log.u_bbr.flex7 = bbr->rc_lt_is_sampling; + log.u_bbr.pkts_out = tim; + log.u_bbr.bw_inuse = bbr->r_ctl.rc_lt_bw; + if (bbr->rc_lt_use_bw == 0) + log.u_bbr.epoch = bbr->r_ctl.rc_pkt_epoch - bbr->r_ctl.rc_lt_epoch; + else + log.u_bbr.epoch = bbr->r_ctl.rc_pkt_epoch - bbr->r_ctl.rc_lt_epoch_use; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_BWSAMP, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static inline void +bbr_log_progress_event(struct tcp_bbr *bbr, struct tcpcb *tp, uint32_t tick, int event, int line) +{ + if (bbr_verbose_logging && (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF)) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, bbr->r_ctl.rc_rcvtime); + log.u_bbr.flex1 = line; + log.u_bbr.flex2 = tick; + log.u_bbr.flex3 = tp->t_maxunacktime; + log.u_bbr.flex4 = tp->t_acktime; + log.u_bbr.flex8 = event; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_PROGRESS, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_type_log_hdwr_pacing(struct tcp_bbr *bbr, const struct ifnet *ifp, + uint64_t rate, uint64_t hw_rate, int line, uint32_t cts, + int error) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = ((hw_rate >> 32) & 0x00000000ffffffff); + log.u_bbr.flex2 = (hw_rate & 0x00000000ffffffff); + log.u_bbr.flex3 = (((uint64_t)ifp >> 32) & 0x00000000ffffffff); + log.u_bbr.flex4 = ((uint64_t)ifp & 0x00000000ffffffff); + log.u_bbr.bw_inuse = rate; + log.u_bbr.flex5 = line; + log.u_bbr.flex6 = error; + log.u_bbr.flex8 = bbr->skip_gain; + log.u_bbr.flex8 <<= 1; + log.u_bbr.flex8 |= bbr->gain_is_limited; + log.u_bbr.flex8 <<= 1; + log.u_bbr.flex8 |= bbr->bbr_hdrw_pacing; + log.u_bbr.pkts_out = bbr->rc_tp->t_maxseg; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_HDWR_PACE, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_type_bbrsnd(struct tcp_bbr *bbr, uint32_t len, uint32_t slot, uint32_t del_by, uint32_t cts, uint32_t line, uint32_t prev_delay) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = slot; + log.u_bbr.flex2 = del_by; + log.u_bbr.flex3 = prev_delay; + log.u_bbr.flex4 = line; + log.u_bbr.flex5 = bbr->r_ctl.rc_last_delay_val; + log.u_bbr.flex6 = bbr->r_ctl.rc_hptsi_agg_delay; + log.u_bbr.flex7 = (0x0000ffff & bbr->r_ctl.rc_hpts_flags); + log.u_bbr.flex8 = bbr->rc_in_persist; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_BBRSND, 0, + len, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_type_bbrrttprop(struct tcp_bbr *bbr, uint32_t t, uint32_t end, uint32_t tsconv, uint32_t cts, int32_t match, uint32_t seq, uint8_t flags) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = bbr->r_ctl.rc_delivered; + log.u_bbr.flex2 = 0; + log.u_bbr.flex3 = bbr->r_ctl.rc_lowest_rtt; + log.u_bbr.flex4 = end; + log.u_bbr.flex5 = seq; + log.u_bbr.flex6 = t; + log.u_bbr.flex7 = match; + log.u_bbr.flex8 = flags; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_BBRRTT, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_exit_gain(struct tcp_bbr *bbr, uint32_t cts, int32_t entry_method) +{ + if (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = bbr->r_ctl.rc_target_at_state; + log.u_bbr.flex2 = (bbr->rc_tp->t_maxseg - bbr->rc_last_options); + log.u_bbr.flex3 = bbr->r_ctl.gain_epoch; + log.u_bbr.flex4 = bbr->r_ctl.rc_pace_max_segs; + log.u_bbr.flex5 = bbr->r_ctl.rc_pace_min_segs; + log.u_bbr.flex6 = bbr->r_ctl.rc_bbr_state_atflight; + log.u_bbr.flex7 = 0; + log.u_bbr.flex8 = entry_method; + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_EXIT_GAIN, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +static void +bbr_log_settings_change(struct tcp_bbr *bbr, int settings_desired) +{ + if (bbr_verbose_logging && (bbr->rc_tp->t_logstate != TCP_LOG_STATE_OFF)) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, bbr->r_ctl.rc_rcvtime); + /* R-HU */ + log.u_bbr.flex1 = 0; + log.u_bbr.flex2 = 0; + log.u_bbr.flex3 = 0; + log.u_bbr.flex4 = 0; + log.u_bbr.flex7 = 0; + log.u_bbr.flex8 = settings_desired; + + TCP_LOG_EVENTP(bbr->rc_tp, NULL, + &bbr->rc_inp->inp_socket->so_rcv, + &bbr->rc_inp->inp_socket->so_snd, + BBR_LOG_SETTINGS_CHG, 0, + 0, &log, false, &bbr->rc_tv); + } +} + +/* + * Returns the bw from the our filter. + */ +static inline uint64_t +bbr_get_full_bw(struct tcp_bbr *bbr) +{ + uint64_t bw; + + bw = get_filter_value(&bbr->r_ctl.rc_delrate); + + return (bw); +} + +static inline void +bbr_set_pktepoch(struct tcp_bbr *bbr, uint32_t cts, int32_t line) +{ + uint64_t calclr; + uint32_t lost, del; + + if (bbr->r_ctl.rc_lost > bbr->r_ctl.rc_lost_at_pktepoch) + lost = bbr->r_ctl.rc_lost - bbr->r_ctl.rc_lost_at_pktepoch; + else + lost = 0; + del = bbr->r_ctl.rc_delivered - bbr->r_ctl.rc_pkt_epoch_del; + if (lost == 0) { + calclr = 0; + } else if (del) { + calclr = lost; + calclr *= (uint64_t)1000; + calclr /= (uint64_t)del; + } else { + /* Nothing delivered? 100.0% loss */ + calclr = 1000; + } + bbr->r_ctl.rc_pkt_epoch_loss_rate = (uint32_t)calclr; + if (IN_RECOVERY(bbr->rc_tp->t_flags)) + bbr->r_ctl.recovery_lr += (uint32_t)calclr; + bbr->r_ctl.rc_pkt_epoch++; + if (bbr->rc_no_pacing && + (bbr->r_ctl.rc_pkt_epoch >= bbr->no_pacing_until)) { + bbr->rc_no_pacing = 0; + tcp_bbr_tso_size_check(bbr, cts); + } + bbr->r_ctl.rc_pkt_epoch_rtt = bbr_calc_time(cts, bbr->r_ctl.rc_pkt_epoch_time); + bbr->r_ctl.rc_pkt_epoch_time = cts; + /* What was our loss rate */ + bbr_log_pkt_epoch(bbr, cts, line, lost, del); + bbr->r_ctl.rc_pkt_epoch_del = bbr->r_ctl.rc_delivered; + bbr->r_ctl.rc_lost_at_pktepoch = bbr->r_ctl.rc_lost; +} + +static inline void +bbr_set_epoch(struct tcp_bbr *bbr, uint32_t cts, int32_t line) +{ + uint32_t epoch_time; + + /* Tick the RTT clock */ + bbr->r_ctl.rc_rtt_epoch++; + epoch_time = cts - bbr->r_ctl.rc_rcv_epoch_start; + bbr_log_time_epoch(bbr, cts, line, epoch_time); + bbr->r_ctl.rc_rcv_epoch_start = cts; +} + + +static inline void +bbr_isit_a_pkt_epoch(struct tcp_bbr *bbr, uint32_t cts, struct bbr_sendmap *rsm, int32_t line, int32_t cum_acked) +{ + if (SEQ_GEQ(rsm->r_delivered, bbr->r_ctl.rc_pkt_epoch_del)) { + bbr->rc_is_pkt_epoch_now = 1; + } +} + +/* + * Returns the bw from either the b/w filter + * or from the lt_bw (if the connection is being + * policed). + */ +static inline uint64_t +__bbr_get_bw(struct tcp_bbr *bbr) +{ + uint64_t bw, min_bw; + uint64_t rtt; + int gm_measure_cnt = 1; + + /* + * For startup we make, like google, a + * minimum b/w. This is generated from the + * IW and the rttProp. We do fall back to srtt + * if for some reason (initial handshake) we don't + * have a rttProp. We, in the worst case, fall back + * to the configured min_bw (rc_initial_hptsi_bw). + */ + if (bbr->rc_bbr_state == BBR_STATE_STARTUP) { + /* Attempt first to use rttProp */ + rtt = (uint64_t)get_filter_value_small(&bbr->r_ctl.rc_rttprop); + if (rtt && (rtt < 0xffffffff)) { +measure: + min_bw = (uint64_t)(bbr_initial_cwnd(bbr, bbr->rc_tp)) * + ((uint64_t)1000000); + min_bw /= rtt; + if (min_bw < bbr->r_ctl.rc_initial_hptsi_bw) { + min_bw = bbr->r_ctl.rc_initial_hptsi_bw; + } + + } else if (bbr->rc_tp->t_srtt != 0) { + /* No rttProp, use srtt? */ + rtt = bbr_get_rtt(bbr, BBR_SRTT); + goto measure; + } else { + min_bw = bbr->r_ctl.rc_initial_hptsi_bw; + } + } else + min_bw = 0; + + if ((bbr->rc_past_init_win == 0) && + (bbr->r_ctl.rc_delivered > bbr_initial_cwnd(bbr, bbr->rc_tp))) + bbr->rc_past_init_win = 1; + if ((bbr->rc_use_google) && (bbr->r_ctl.r_measurement_count >= 1)) + gm_measure_cnt = 0; + if (gm_measure_cnt && + ((bbr->r_ctl.r_measurement_count < bbr_min_measurements_req) || + (bbr->rc_past_init_win == 0))) { + /* For google we use our guess rate until we get 1 measurement */ + +use_initial_window: + rtt = (uint64_t)get_filter_value_small(&bbr->r_ctl.rc_rttprop); + if (rtt && (rtt < 0xffffffff)) { + /* + * We have an RTT measurment. Use that in + * combination with our initial window to calculate + * a b/w. + */ + bw = (uint64_t)(bbr_initial_cwnd(bbr, bbr->rc_tp)) * + ((uint64_t)1000000); + bw /= rtt; + if (bw < bbr->r_ctl.rc_initial_hptsi_bw) { + bw = bbr->r_ctl.rc_initial_hptsi_bw; + } + } else { + /* Drop back to the 40 and punt to a default */ + bw = bbr->r_ctl.rc_initial_hptsi_bw; + } + if (bw < 1) + /* Probably should panic */ + bw = 1; + if (bw > min_bw) + return (bw); + else + return (min_bw); + } + if (bbr->rc_lt_use_bw) + bw = bbr->r_ctl.rc_lt_bw; + else if (bbr->r_recovery_bw && (bbr->rc_use_google == 0)) + bw = bbr->r_ctl.red_bw; + else + bw = get_filter_value(&bbr->r_ctl.rc_delrate); + if (bbr->rc_tp->t_peakrate_thr && (bbr->rc_use_google == 0)) { + /* + * Enforce user set rate limit, keep in mind that + * t_peakrate_thr is in B/s already + */ + bw = uqmin((uint64_t)bbr->rc_tp->t_peakrate_thr, bw); + } + if (bw == 0) { + /* We should not be at 0, go to the initial window then */ + goto use_initial_window; + } + if (bw < 1) + /* Probably should panic */ + bw = 1; + if (bw < min_bw) + bw = min_bw; + return (bw); +} + +static inline uint64_t +bbr_get_bw(struct tcp_bbr *bbr) +{ + uint64_t bw; + + bw = __bbr_get_bw(bbr); + return (bw); +} + +static inline void +bbr_reset_lt_bw_interval(struct tcp_bbr *bbr, uint32_t cts) +{ + bbr->r_ctl.rc_lt_epoch = bbr->r_ctl.rc_pkt_epoch; + bbr->r_ctl.rc_lt_time = bbr->r_ctl.rc_del_time; + bbr->r_ctl.rc_lt_del = bbr->r_ctl.rc_delivered; + bbr->r_ctl.rc_lt_lost = bbr->r_ctl.rc_lost; +} + +static inline void +bbr_reset_lt_bw_sampling(struct tcp_bbr *bbr, uint32_t cts) +{ + bbr->rc_lt_is_sampling = 0; + bbr->rc_lt_use_bw = 0; + bbr->r_ctl.rc_lt_bw = 0; + bbr_reset_lt_bw_interval(bbr, cts); +} + +static inline void +bbr_lt_bw_samp_done(struct tcp_bbr *bbr, uint64_t bw, uint32_t cts, uint32_t timin) +{ + uint64_t diff; + + /* Do we have a previous sample? */ + if (bbr->r_ctl.rc_lt_bw) { + /* Get the diff in bytes per second */ + if (bbr->r_ctl.rc_lt_bw > bw) + diff = bbr->r_ctl.rc_lt_bw - bw; + else + diff = bw - bbr->r_ctl.rc_lt_bw; + if ((diff <= bbr_lt_bw_diff) || + (diff <= (bbr->r_ctl.rc_lt_bw / bbr_lt_bw_ratio))) { + /* Consider us policed */ + uint32_t saved_bw; + + saved_bw = (uint32_t)bbr->r_ctl.rc_lt_bw; + bbr->r_ctl.rc_lt_bw = (bw + bbr->r_ctl.rc_lt_bw) / 2; /* average of two */ + bbr->rc_lt_use_bw = 1; + bbr->r_ctl.rc_bbr_hptsi_gain = BBR_UNIT; + /* + * Use pkt based epoch for measuring length of + * policer up + */ + bbr->r_ctl.rc_lt_epoch_use = bbr->r_ctl.rc_pkt_epoch; + /* + * reason 4 is we need to start consider being + * policed + */ + bbr_log_type_ltbw(bbr, cts, 4, (uint32_t)bw, saved_bw, (uint32_t)diff, timin); + return; + } + } + bbr->r_ctl.rc_lt_bw = bw; + bbr_reset_lt_bw_interval(bbr, cts); + bbr_log_type_ltbw(bbr, cts, 5, 0, (uint32_t)bw, 0, timin); +} + +/* + * RRS: Copied from user space! + * Calculate a uniformly distributed random number less than upper_bound + * avoiding "modulo bias". + * + * Uniformity is achieved by generating new random numbers until the one + * returned is outside the range [0, 2**32 % upper_bound). This + * guarantees the selected random number will be inside + * [2**32 % upper_bound, 2**32) which maps back to [0, upper_bound) + * after reduction modulo upper_bound. + */ +static uint32_t +arc4random_uniform(uint32_t upper_bound) +{ + uint32_t r, min; + + if (upper_bound < 2) + return 0; + + /* 2**32 % x == (2**32 - x) % x */ + min = -upper_bound % upper_bound; + + /* + * This could theoretically loop forever but each retry has + * p > 0.5 (worst case, usually far better) of selecting a + * number inside the range we need, so it should rarely need + * to re-roll. + */ + for (;;) { + r = arc4random(); + if (r >= min) + break; + } + + return r % upper_bound; +} + +static void +bbr_randomize_extra_state_time(struct tcp_bbr *bbr) +{ + uint32_t ran, deduct; + + ran = arc4random_uniform(bbr_rand_ot); + if (ran) { + deduct = bbr->r_ctl.rc_level_state_extra / ran; + bbr->r_ctl.rc_level_state_extra -= deduct; + } +} +/* + * Return randomly the starting state + * to use in probebw. + */ +static uint8_t +bbr_pick_probebw_substate(struct tcp_bbr *bbr, uint32_t cts) +{ + uint32_t ran; + uint8_t ret_val; + + /* Initialize the offset to 0 */ + bbr->r_ctl.rc_exta_time_gd = 0; + bbr->rc_hit_state_1 = 0; + bbr->r_ctl.rc_level_state_extra = 0; + ran = arc4random_uniform((BBR_SUBSTATE_COUNT-1)); + /* + * The math works funny here :) the return value is used to set the + * substate and then the state change is called which increments by + * one. So if we return 1 (DRAIN) we will increment to 2 (LEVEL1) when + * we fully enter the state. Note that the (8 - 1 - ran) assures that + * we return 1 - 7, so we dont return 0 and end up starting in + * state 1 (DRAIN). + */ + ret_val = BBR_SUBSTATE_COUNT - 1 - ran; + /* Set an epoch */ + if ((cts - bbr->r_ctl.rc_rcv_epoch_start) >= bbr_get_rtt(bbr, BBR_RTT_PROP)) + bbr_set_epoch(bbr, cts, __LINE__); + + bbr->r_ctl.bbr_lost_at_state = bbr->r_ctl.rc_lost; + return (ret_val); +} + +static void +bbr_lt_bw_sampling(struct tcp_bbr *bbr, uint32_t cts, int32_t loss_detected) +{ + uint32_t diff, d_time; + uint64_t del_time, bw, lost, delivered; + + if (bbr->r_use_policer == 0) + return; + if (bbr->rc_lt_use_bw) { + /* We are using lt bw do we stop yet? */ + diff = bbr->r_ctl.rc_pkt_epoch - bbr->r_ctl.rc_lt_epoch_use; + if (diff > bbr_lt_bw_max_rtts) { + /* Reset it all */ +reset_all: + bbr_reset_lt_bw_sampling(bbr, cts); + if (bbr->rc_filled_pipe) { + bbr_set_epoch(bbr, cts, __LINE__); + bbr->rc_bbr_substate = bbr_pick_probebw_substate(bbr, cts); + bbr_substate_change(bbr, cts, __LINE__, 0); + bbr->rc_bbr_state = BBR_STATE_PROBE_BW; + bbr_log_type_statechange(bbr, cts, __LINE__); + } else { + /* + * This should not happen really + * unless we remove the startup/drain + * restrictions above. + */ + bbr->rc_bbr_state = BBR_STATE_STARTUP; + bbr_set_epoch(bbr, cts, __LINE__); + bbr->r_ctl.rc_bbr_state_time = cts; + bbr->r_ctl.rc_lost_at_startup = bbr->r_ctl.rc_lost; + bbr->r_ctl.rc_bbr_hptsi_gain = bbr->r_ctl.rc_startup_pg; + bbr->r_ctl.rc_bbr_cwnd_gain = bbr->r_ctl.rc_startup_pg; + bbr_set_state_target(bbr, __LINE__); + bbr_log_type_statechange(bbr, cts, __LINE__); + } + /* reason 0 is to stop using lt-bw */ + bbr_log_type_ltbw(bbr, cts, 0, 0, 0, 0, 0); + return; + } + if (bbr_lt_intvl_fp == 0) { + /* Not doing false-postive detection */ + return; + } + /* False positive detection */ + if (diff == bbr_lt_intvl_fp) { + /* At bbr_lt_intvl_fp we record the lost */ + bbr->r_ctl.rc_lt_del = bbr->r_ctl.rc_delivered; + bbr->r_ctl.rc_lt_lost = bbr->r_ctl.rc_lost; + } else if (diff > (bbr_lt_intvl_min_rtts + bbr_lt_intvl_fp)) { + /* Now is our loss rate still high? */ + lost = bbr->r_ctl.rc_lost - bbr->r_ctl.rc_lt_lost; + delivered = bbr->r_ctl.rc_delivered - bbr->r_ctl.rc_lt_del; + if ((delivered == 0) || + (((lost * 1000)/delivered) < bbr_lt_fd_thresh)) { + /* No still below our threshold */ + bbr_log_type_ltbw(bbr, cts, 7, lost, delivered, 0, 0); + } else { + /* Yikes its still high, it must be a false positive */ + bbr_log_type_ltbw(bbr, cts, 8, lost, delivered, 0, 0); + goto reset_all; + } + } + return; + } + /* + * Wait for the first loss before sampling, to let the policer + * exhaust its tokens and estimate the steady-state rate allowed by + * the policer. Starting samples earlier includes bursts that + * over-estimate the bw. + */ + if (bbr->rc_lt_is_sampling == 0) { + /* reason 1 is to begin doing the sampling */ + if (loss_detected == 0) + return; + bbr_reset_lt_bw_interval(bbr, cts); + bbr->rc_lt_is_sampling = 1; + bbr_log_type_ltbw(bbr, cts, 1, 0, 0, 0, 0); + return; + } + /* Now how long were we delivering long term last> */ + if (TSTMP_GEQ(bbr->r_ctl.rc_del_time, bbr->r_ctl.rc_lt_time)) + d_time = bbr->r_ctl.rc_del_time - bbr->r_ctl.rc_lt_time; + else + d_time = 0; + + /* To avoid underestimates, reset sampling if we run out of data. */ + if (bbr->r_ctl.r_app_limited_until) { + /* Can not measure in app-limited state */ + bbr_reset_lt_bw_sampling(bbr, cts); + /* reason 2 is to reset sampling due to app limits */ + bbr_log_type_ltbw(bbr, cts, 2, 0, 0, 0, d_time); + return; + } + diff = bbr->r_ctl.rc_pkt_epoch - bbr->r_ctl.rc_lt_epoch; + if (diff < bbr_lt_intvl_min_rtts) { + /* + * need more samples (we don't + * start on a round like linux so + * we need 1 more). + */ + /* 6 is not_enough time or no-loss */ + bbr_log_type_ltbw(bbr, cts, 6, 0, 0, 0, d_time); + return; + } + if (diff > (4 * bbr_lt_intvl_min_rtts)) { + /* + * For now if we wait too long, reset all sampling. We need + * to do some research here, its possible that we should + * base this on how much loss as occurred.. something like + * if its under 10% (or some thresh) reset all otherwise + * don't. Thats for phase II I guess. + */ + bbr_reset_lt_bw_sampling(bbr, cts); + /* reason 3 is to reset sampling due too long of sampling */ + bbr_log_type_ltbw(bbr, cts, 3, 0, 0, 0, d_time); + return; + } + /* + * End sampling interval when a packet is lost, so we estimate the + * policer tokens were exhausted. Stopping the sampling before the + * tokens are exhausted under-estimates the policed rate. + */ + if (loss_detected == 0) { + /* 6 is not_enough time or no-loss */ + bbr_log_type_ltbw(bbr, cts, 6, 0, 0, 0, d_time); + return; + } + /* Calculate packets lost and delivered in sampling interval. */ + lost = bbr->r_ctl.rc_lost - bbr->r_ctl.rc_lt_lost; + delivered = bbr->r_ctl.rc_delivered - bbr->r_ctl.rc_lt_del; + if ((delivered == 0) || + (((lost * 1000)/delivered) < bbr_lt_loss_thresh)) { + bbr_log_type_ltbw(bbr, cts, 6, lost, delivered, 0, d_time); + return; + } + if (d_time < 1000) { + /* Not enough time. wait */ + /* 6 is not_enough time or no-loss */ + bbr_log_type_ltbw(bbr, cts, 6, 0, 0, 0, d_time); + return; + } + if (d_time >= (0xffffffff / USECS_IN_MSEC)) { + /* Too long */ + bbr_reset_lt_bw_sampling(bbr, cts); + /* reason 3 is to reset sampling due too long of sampling */ + bbr_log_type_ltbw(bbr, cts, 3, 0, 0, 0, d_time); + return; + } + del_time = d_time; + bw = delivered; + bw *= (uint64_t)USECS_IN_SECOND; + bw /= del_time; + bbr_lt_bw_samp_done(bbr, bw, cts, d_time); +} + +/* + * Allocate a sendmap from our zone. + */ +static struct bbr_sendmap * +bbr_alloc(struct tcp_bbr *bbr) +{ + struct bbr_sendmap *rsm; + + BBR_STAT_INC(bbr_to_alloc); + rsm = uma_zalloc(bbr_zone, (M_NOWAIT | M_ZERO)); + if (rsm) { + bbr->r_ctl.rc_num_maps_alloced++; + return (rsm); + } + if (bbr->r_ctl.rc_free_cnt) { + BBR_STAT_INC(bbr_to_alloc_emerg); + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_free); + TAILQ_REMOVE(&bbr->r_ctl.rc_free, rsm, r_next); + bbr->r_ctl.rc_free_cnt--; + return (rsm); + } + BBR_STAT_INC(bbr_to_alloc_failed); + return (NULL); +} + +static struct bbr_sendmap * +bbr_alloc_full_limit(struct tcp_bbr *bbr) +{ + if ((bbr_tcp_map_entries_limit > 0) && + (bbr->r_ctl.rc_num_maps_alloced >= bbr_tcp_map_entries_limit)) { + BBR_STAT_INC(bbr_alloc_limited); + if (!bbr->alloc_limit_reported) { + bbr->alloc_limit_reported = 1; + BBR_STAT_INC(bbr_alloc_limited_conns); + } + return (NULL); + } + return (bbr_alloc(bbr)); +} + + +/* wrapper to allocate a sendmap entry, subject to a specific limit */ +static struct bbr_sendmap * +bbr_alloc_limit(struct tcp_bbr *bbr, uint8_t limit_type) +{ + struct bbr_sendmap *rsm; + + if (limit_type) { + /* currently there is only one limit type */ + if (bbr_tcp_map_split_limit > 0 && + bbr->r_ctl.rc_num_split_allocs >= bbr_tcp_map_split_limit) { + BBR_STAT_INC(bbr_split_limited); + if (!bbr->alloc_limit_reported) { + bbr->alloc_limit_reported = 1; + BBR_STAT_INC(bbr_alloc_limited_conns); + } + return (NULL); + } + } + + /* allocate and mark in the limit type, if set */ + rsm = bbr_alloc(bbr); + if (rsm != NULL && limit_type) { + rsm->r_limit_type = limit_type; + bbr->r_ctl.rc_num_split_allocs++; + } + return (rsm); +} + +static void +bbr_free(struct tcp_bbr *bbr, struct bbr_sendmap *rsm) +{ + if (rsm->r_limit_type) { + /* currently there is only one limit type */ + bbr->r_ctl.rc_num_split_allocs--; + } + if (rsm->r_is_smallmap) + bbr->r_ctl.rc_num_small_maps_alloced--; + if (bbr->r_ctl.rc_tlp_send == rsm) + bbr->r_ctl.rc_tlp_send = NULL; + if (bbr->r_ctl.rc_resend == rsm) { + bbr->r_ctl.rc_resend = NULL; + } + if (bbr->r_ctl.rc_next == rsm) + bbr->r_ctl.rc_next = NULL; + if (bbr->r_ctl.rc_sacklast == rsm) + bbr->r_ctl.rc_sacklast = NULL; + if (bbr->r_ctl.rc_free_cnt < bbr_min_req_free) { + memset(rsm, 0, sizeof(struct bbr_sendmap)); + TAILQ_INSERT_TAIL(&bbr->r_ctl.rc_free, rsm, r_next); + rsm->r_limit_type = 0; + bbr->r_ctl.rc_free_cnt++; + return; + } + bbr->r_ctl.rc_num_maps_alloced--; + uma_zfree(bbr_zone, rsm); +} + +/* + * Returns the BDP. + */ +static uint64_t +bbr_get_bw_delay_prod(uint64_t rtt, uint64_t bw) { + /* + * Calculate the bytes in flight needed given the bw (in bytes per + * second) and the specifyed rtt in useconds. We need to put out the + * returned value per RTT to match that rate. Gain will normaly + * raise it up from there. + * + * This should not overflow as long as the bandwidth is below 1 + * TByte per second (bw < 10**12 = 2**40) and the rtt is smaller + * than 1000 seconds (rtt < 10**3 * 10**6 = 10**9 = 2**30). + */ + uint64_t usec_per_sec; + + usec_per_sec = USECS_IN_SECOND; + return ((rtt * bw) / usec_per_sec); +} + +/* + * Return the initial cwnd. + */ +static uint32_t +bbr_initial_cwnd(struct tcp_bbr *bbr, struct tcpcb *tp) +{ + uint32_t i_cwnd; + + if (bbr->rc_init_win) { + i_cwnd = bbr->rc_init_win * tp->t_maxseg; + } else if (V_tcp_initcwnd_segments) + i_cwnd = min((V_tcp_initcwnd_segments * tp->t_maxseg), + max(2 * tp->t_maxseg, 14600)); + else if (V_tcp_do_rfc3390) + i_cwnd = min(4 * tp->t_maxseg, + max(2 * tp->t_maxseg, 4380)); + else { + /* Per RFC5681 Section 3.1 */ + if (tp->t_maxseg > 2190) + i_cwnd = 2 * tp->t_maxseg; + else if (tp->t_maxseg > 1095) + i_cwnd = 3 * tp->t_maxseg; + else + i_cwnd = 4 * tp->t_maxseg; + } + return (i_cwnd); +} + +/* + * Given a specified gain, return the target + * cwnd based on that gain. + */ +static uint32_t +bbr_get_raw_target_cwnd(struct tcp_bbr *bbr, uint32_t gain, uint64_t bw) +{ + uint64_t bdp, rtt; + uint32_t cwnd; + + if ((get_filter_value_small(&bbr->r_ctl.rc_rttprop) == 0xffffffff) || + (bbr_get_full_bw(bbr) == 0)) { + /* No measurements yet */ + return (bbr_initial_cwnd(bbr, bbr->rc_tp)); + } + /* + * Get bytes per RTT needed (rttProp is normally in + * bbr_cwndtarget_rtt_touse) + */ + rtt = bbr_get_rtt(bbr, bbr_cwndtarget_rtt_touse); + /* Get the bdp from the two values */ + bdp = bbr_get_bw_delay_prod(rtt, bw); + /* Now apply the gain */ + cwnd = (uint32_t)(((bdp * ((uint64_t)gain)) + (uint64_t)(BBR_UNIT - 1)) / ((uint64_t)BBR_UNIT)); + + return (cwnd); +} + +static uint32_t +bbr_get_target_cwnd(struct tcp_bbr *bbr, uint64_t bw, uint32_t gain) +{ + uint32_t cwnd, mss; + + mss = min((bbr->rc_tp->t_maxseg - bbr->rc_last_options), bbr->r_ctl.rc_pace_max_segs); + /* Get the base cwnd with gain rounded to a mss */ + cwnd = roundup(bbr_get_raw_target_cwnd(bbr, bw, gain), mss); + /* + * Add in N (2 default since we do not have a + * fq layer to trap packets in) quanta's per the I-D + * section 4.2.3.2 quanta adjust. + */ + cwnd += (bbr_quanta * bbr->r_ctl.rc_pace_max_segs); + if (bbr->rc_use_google) { + if((bbr->rc_bbr_state == BBR_STATE_PROBE_BW) && + (bbr_state_val(bbr) == BBR_SUB_GAIN)) { + /* + * The linux implementation adds + * an extra 2 x mss in gain cycle which + * is documented no-where except in the code. + * so we add more for Neal undocumented feature + */ + cwnd += 2 * mss; + } + if ((cwnd / mss) & 0x1) { + /* Round up for odd num mss */ + cwnd += mss; + } + } + /* Are we below the min cwnd? */ + if (cwnd < get_min_cwnd(bbr)) + return (get_min_cwnd(bbr)); + return (cwnd); +} + +static uint16_t +bbr_gain_adjust(struct tcp_bbr *bbr, uint16_t gain) +{ + if (gain < 1) + gain = 1; + return (gain); +} + +static uint32_t +bbr_get_header_oh(struct tcp_bbr *bbr) +{ + int seg_oh; + + seg_oh = 0; + if (bbr->r_ctl.rc_inc_tcp_oh) { + /* Do we include TCP overhead? */ + seg_oh = (bbr->rc_last_options + sizeof(struct tcphdr)); + } + if (bbr->r_ctl.rc_inc_ip_oh) { + /* Do we include IP overhead? */ +#ifdef INET6 + if (bbr->r_is_v6) + seg_oh += sizeof(struct ip6_hdr); + else +#endif +#ifdef INET + seg_oh += sizeof(struct ip); +#endif + } + if (bbr->r_ctl.rc_inc_enet_oh) { + /* Do we include the ethernet overhead? */ + seg_oh += sizeof(struct ether_header); + } + return(seg_oh); +} + + +static uint32_t +bbr_get_pacing_length(struct tcp_bbr *bbr, uint16_t gain, uint32_t useconds_time, uint64_t bw) +{ + uint64_t divor, res, tim; + + if (useconds_time == 0) + return (0); + gain = bbr_gain_adjust(bbr, gain); + divor = (uint64_t)USECS_IN_SECOND * (uint64_t)BBR_UNIT; + tim = useconds_time; + res = (tim * bw * gain) / divor; + if (res == 0) + res = 1; + return ((uint32_t)res); +} + +/* + * Given a gain and a length return the delay in useconds that + * should be used to evenly space out packets + * on the connection (based on the gain factor). + */ +static uint32_t +bbr_get_pacing_delay(struct tcp_bbr *bbr, uint16_t gain, int32_t len, uint32_t cts, int nolog) +{ + uint64_t bw, lentim, res; + uint32_t usecs, srtt, over = 0; + uint32_t seg_oh, num_segs, maxseg; + + if (len == 0) + return (0); + + maxseg = bbr->rc_tp->t_maxseg - bbr->rc_last_options; + num_segs = (len + maxseg - 1) / maxseg; + if (bbr->rc_use_google == 0) { + seg_oh = bbr_get_header_oh(bbr); + len += (num_segs * seg_oh); + } + gain = bbr_gain_adjust(bbr, gain); + bw = bbr_get_bw(bbr); + if (bbr->rc_use_google) { + uint64_t cbw; + + /* + * Reduce the b/w by the google discount + * factor 10 = 1%. + */ + cbw = bw * (uint64_t)(1000 - bbr->r_ctl.bbr_google_discount); + cbw /= (uint64_t)1000; + /* We don't apply a discount if it results in 0 */ + if (cbw > 0) + bw = cbw; + } + lentim = ((uint64_t)len * + (uint64_t)USECS_IN_SECOND * + (uint64_t)BBR_UNIT); + res = lentim / ((uint64_t)gain * bw); + if (res == 0) + res = 1; + usecs = (uint32_t)res; + srtt = bbr_get_rtt(bbr, BBR_SRTT); + if (bbr_hptsi_max_mul && bbr_hptsi_max_div && + (bbr->rc_use_google == 0) && + (usecs > ((srtt * bbr_hptsi_max_mul) / bbr_hptsi_max_div))) { + /* + * We cannot let the delay be more than 1/2 the srtt time. + * Otherwise we cannot pace out or send properly. + */ + over = usecs = (srtt * bbr_hptsi_max_mul) / bbr_hptsi_max_div; + BBR_STAT_INC(bbr_hpts_min_time); + } + if (!nolog) + bbr_log_pacing_delay_calc(bbr, gain, len, cts, usecs, bw, over, 1); + return (usecs); +} + +static void +bbr_ack_received(struct tcpcb *tp, struct tcp_bbr *bbr, struct tcphdr *th, uint32_t bytes_this_ack, + uint32_t sack_changed, uint32_t prev_acked, int32_t line, uint32_t losses) +{ + INP_WLOCK_ASSERT(tp->t_inpcb); + uint64_t bw; + uint32_t cwnd, target_cwnd, saved_bytes, maxseg; + int32_t meth; + +#ifdef NETFLIX_STATS + if ((tp->t_flags & TF_GPUTINPROG) && + SEQ_GEQ(th->th_ack, tp->gput_ack)) { + /* + * Strech acks and compressed acks will cause this to + * oscillate but we are doing it the same way as the main + * stack so it will be compariable (though possibly not + * ideal). + */ + int32_t cgput; + int64_t gput, time_stamp; + + gput = (int64_t) (th->th_ack - tp->gput_seq) * 8; + time_stamp = max(1, ((bbr->r_ctl.rc_rcvtime - tp->gput_ts) / 1000)); + cgput = gput / time_stamp; + stats_voi_update_abs_u32(tp->t_stats, VOI_TCP_GPUT, + cgput); + if (tp->t_stats_gput_prev > 0) + stats_voi_update_abs_s32(tp->t_stats, + VOI_TCP_GPUT_ND, + ((gput - tp->t_stats_gput_prev) * 100) / + tp->t_stats_gput_prev); + tp->t_flags &= ~TF_GPUTINPROG; + tp->t_stats_gput_prev = cgput; + } +#endif + if ((bbr->rc_bbr_state == BBR_STATE_PROBE_RTT) && + ((bbr->r_ctl.bbr_rttprobe_gain_val == 0) || bbr->rc_use_google)) { + /* We don't change anything in probe-rtt */ + return; + } + maxseg = tp->t_maxseg - bbr->rc_last_options; + saved_bytes = bytes_this_ack; + bytes_this_ack += sack_changed; + if (bytes_this_ack > prev_acked) { + bytes_this_ack -= prev_acked; + /* + * A byte ack'd gives us a full mss + * to be like linux i.e. they count packets. + */ + if ((bytes_this_ack < maxseg) && bbr->rc_use_google) + bytes_this_ack = maxseg; + } else { + /* Unlikely */ + bytes_this_ack = 0; + } + cwnd = tp->snd_cwnd; + bw = get_filter_value(&bbr->r_ctl.rc_delrate); + if (bw) + target_cwnd = bbr_get_target_cwnd(bbr, + bw, + (uint32_t)bbr->r_ctl.rc_bbr_cwnd_gain); + else + target_cwnd = bbr_initial_cwnd(bbr, bbr->rc_tp); + if (IN_RECOVERY(tp->t_flags) && + (bbr->bbr_prev_in_rec == 0)) { + /* + * We are entering recovery and + * thus packet conservation. + */ + bbr->pkt_conservation = 1; + bbr->r_ctl.rc_recovery_start = bbr->r_ctl.rc_rcvtime; + cwnd = ctf_flight_size(tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)) + + bytes_this_ack; + } + if (IN_RECOVERY(tp->t_flags)) { + uint32_t flight; + + bbr->bbr_prev_in_rec = 1; + if (cwnd > losses) { + cwnd -= losses; + if (cwnd < maxseg) + cwnd = maxseg; + } else + cwnd = maxseg; + flight = ctf_flight_size(tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + bbr_log_type_cwndupd(bbr, flight, 0, + losses, 10, 0, 0, line); + if (bbr->pkt_conservation) { + uint32_t time_in; + + if (TSTMP_GEQ(bbr->r_ctl.rc_rcvtime, bbr->r_ctl.rc_recovery_start)) + time_in = bbr->r_ctl.rc_rcvtime - bbr->r_ctl.rc_recovery_start; + else + time_in = 0; + + if (time_in >= bbr_get_rtt(bbr, BBR_RTT_PROP)) { + /* Clear packet conservation after an rttProp */ + bbr->pkt_conservation = 0; + } else { + if ((flight + bytes_this_ack) > cwnd) + cwnd = flight + bytes_this_ack; + if (cwnd < get_min_cwnd(bbr)) + cwnd = get_min_cwnd(bbr); + tp->snd_cwnd = cwnd; + bbr_log_type_cwndupd(bbr, saved_bytes, sack_changed, + prev_acked, 1, target_cwnd, th->th_ack, line); + return; + } + } + } else + bbr->bbr_prev_in_rec = 0; + if ((bbr->rc_use_google == 0) && bbr->r_ctl.restrict_growth) { + bbr->r_ctl.restrict_growth--; + if (bytes_this_ack > maxseg) + bytes_this_ack = maxseg; + } + if (bbr->rc_filled_pipe) { + /* + * Here we have exited startup and filled the pipe. We will + * thus allow the cwnd to shrink to the target. We hit here + * mostly. + */ + uint32_t s_cwnd; + + meth = 2; + s_cwnd = min((cwnd + bytes_this_ack), target_cwnd); + if (s_cwnd > cwnd) + cwnd = s_cwnd; + else if (bbr_cwnd_may_shrink || bbr->rc_use_google || bbr->rc_no_pacing) + cwnd = s_cwnd; + } else { + /* + * Here we are still in startup, we increase cwnd by what + * has been acked. + */ + if ((cwnd < target_cwnd) || + (bbr->rc_past_init_win == 0)) { + meth = 3; + cwnd += bytes_this_ack; + } else { + /* + * Method 4 means we are at target so no gain in + * startup and past the initial window. + */ + meth = 4; + } + } + tp->snd_cwnd = max(cwnd, get_min_cwnd(bbr)); + bbr_log_type_cwndupd(bbr, saved_bytes, sack_changed, prev_acked, meth, target_cwnd, th->th_ack, line); +} + +static void +tcp_bbr_partialack(struct tcpcb *tp) +{ + struct tcp_bbr *bbr; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + INP_WLOCK_ASSERT(tp->t_inpcb); + if (ctf_flight_size(tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)) <= + tp->snd_cwnd) { + bbr->r_wanted_output = 1; + } +} + +static void +bbr_post_recovery(struct tcpcb *tp) +{ + struct tcp_bbr *bbr; + uint32_t flight; + + INP_WLOCK_ASSERT(tp->t_inpcb); + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + /* + * Here we just exit recovery. + */ + EXIT_RECOVERY(tp->t_flags); + /* Lock in our b/w reduction for the specified number of pkt-epochs */ + bbr->r_recovery_bw = 0; + tp->snd_recover = tp->snd_una; + tcp_bbr_tso_size_check(bbr, bbr->r_ctl.rc_rcvtime); + bbr->pkt_conservation = 0; + if (bbr->rc_use_google == 0) { + /* + * For non-google mode lets + * go ahead and make sure we clear + * the recovery state so if we + * bounce back in to recovery we + * will do PC. + */ + bbr->bbr_prev_in_rec = 0; + } + bbr_log_type_exit_rec(bbr); + if (bbr->rc_bbr_state != BBR_STATE_PROBE_RTT) { + tp->snd_cwnd = max(tp->snd_cwnd, bbr->r_ctl.rc_cwnd_on_ent); + bbr_log_type_cwndupd(bbr, 0, 0, 0, 15, 0, 0, __LINE__); + } else { + /* For probe-rtt case lets fix up its saved_cwnd */ + if (bbr->r_ctl.rc_saved_cwnd < bbr->r_ctl.rc_cwnd_on_ent) { + bbr->r_ctl.rc_saved_cwnd = bbr->r_ctl.rc_cwnd_on_ent; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 16, 0, 0, __LINE__); + } + } + flight = ctf_flight_size(tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + if ((bbr->rc_use_google == 0) && + bbr_do_red) { + uint64_t val, lr2use; + uint32_t maxseg, newcwnd, acks_inflight, ratio, cwnd; + uint32_t *cwnd_p; + + if (bbr_get_rtt(bbr, BBR_SRTT)) { + val = ((uint64_t)bbr_get_rtt(bbr, BBR_RTT_PROP) * (uint64_t)1000); + val /= bbr_get_rtt(bbr, BBR_SRTT); + ratio = (uint32_t)val; + } else + ratio = 1000; + + bbr_log_type_cwndupd(bbr, bbr_red_mul, bbr_red_div, + bbr->r_ctl.recovery_lr, 21, + ratio, + bbr->r_ctl.rc_red_cwnd_pe, + __LINE__); + if ((ratio < bbr_do_red) || (bbr_do_red == 0)) + goto done; + if (((bbr->rc_bbr_state == BBR_STATE_PROBE_RTT) && + bbr_prtt_slam_cwnd) || + (bbr_sub_drain_slam_cwnd && + (bbr->rc_bbr_state == BBR_STATE_PROBE_BW) && + bbr->rc_hit_state_1 && + (bbr_state_val(bbr) == BBR_SUB_DRAIN)) || + ((bbr->rc_bbr_state == BBR_STATE_DRAIN) && + bbr_slam_cwnd_in_main_drain)) { + /* + * Here we must poke at the saved cwnd + * as well as the cwnd. + */ + cwnd = bbr->r_ctl.rc_saved_cwnd; + cwnd_p = &bbr->r_ctl.rc_saved_cwnd; + } else { + cwnd = tp->snd_cwnd; + cwnd_p = &tp->snd_cwnd; + } + maxseg = tp->t_maxseg - bbr->rc_last_options; + /* Add the overall lr with the recovery lr */ + if (bbr->r_ctl.rc_lost == 0) + lr2use = 0; + else if (bbr->r_ctl.rc_delivered == 0) + lr2use = 1000; + else { + lr2use = bbr->r_ctl.rc_lost * 1000; + lr2use /= bbr->r_ctl.rc_delivered; + } + lr2use += bbr->r_ctl.recovery_lr; + acks_inflight = (flight / (maxseg * 2)); + if (bbr_red_scale) { + lr2use *= bbr_get_rtt(bbr, BBR_SRTT); + lr2use /= bbr_red_scale; + if ((bbr_red_growth_restrict) && + ((bbr_get_rtt(bbr, BBR_SRTT)/bbr_red_scale) > 1)) + bbr->r_ctl.restrict_growth += acks_inflight; + } + if (lr2use) { + val = (uint64_t)cwnd * lr2use; + val /= 1000; + if (cwnd > val) + newcwnd = roundup((cwnd - val), maxseg); + else + newcwnd = maxseg; + } else { + val = (uint64_t)cwnd * (uint64_t)bbr_red_mul; + val /= (uint64_t)bbr_red_div; + newcwnd = roundup((uint32_t)val, maxseg); + } + /* with standard delayed acks how many acks can I expect? */ + if (bbr_drop_limit == 0) { + /* + * Anticpate how much we will + * raise the cwnd based on the acks. + */ + if ((newcwnd + (acks_inflight * maxseg)) < get_min_cwnd(bbr)) { + /* We do enforce the min (with the acks) */ + newcwnd = (get_min_cwnd(bbr) - acks_inflight); + } + } else { + /* + * A strict drop limit of N is is inplace + */ + if (newcwnd < (bbr_drop_limit * maxseg)) { + newcwnd = bbr_drop_limit * maxseg; + } + } + /* For the next N acks do we restrict the growth */ + *cwnd_p = newcwnd; + if (tp->snd_cwnd > newcwnd) + tp->snd_cwnd = newcwnd; + bbr_log_type_cwndupd(bbr, bbr_red_mul, bbr_red_div, val, 22, + (uint32_t)lr2use, + bbr_get_rtt(bbr, BBR_SRTT), __LINE__); + bbr->r_ctl.rc_red_cwnd_pe = bbr->r_ctl.rc_pkt_epoch; + } +done: + bbr->r_ctl.recovery_lr = 0; + if (flight <= tp->snd_cwnd) { + bbr->r_wanted_output = 1; + } + tcp_bbr_tso_size_check(bbr, bbr->r_ctl.rc_rcvtime); +} + +static void +bbr_setup_red_bw(struct tcp_bbr *bbr, uint32_t cts) +{ + bbr->r_ctl.red_bw = get_filter_value(&bbr->r_ctl.rc_delrate); + /* Limit the drop in b/w to 1/2 our current filter. */ + if (bbr->r_ctl.red_bw > bbr->r_ctl.rc_bbr_cur_del_rate) + bbr->r_ctl.red_bw = bbr->r_ctl.rc_bbr_cur_del_rate; + if (bbr->r_ctl.red_bw < (get_filter_value(&bbr->r_ctl.rc_delrate) / 2)) + bbr->r_ctl.red_bw = get_filter_value(&bbr->r_ctl.rc_delrate) / 2; + tcp_bbr_tso_size_check(bbr, cts); +} + +static void +bbr_cong_signal(struct tcpcb *tp, struct tcphdr *th, uint32_t type, struct bbr_sendmap *rsm) +{ + struct tcp_bbr *bbr; + + INP_WLOCK_ASSERT(tp->t_inpcb); + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + switch (type) { + case CC_NDUPACK: + if (!IN_RECOVERY(tp->t_flags)) { + tp->snd_recover = tp->snd_max; + /* Start a new epoch */ + bbr_set_pktepoch(bbr, bbr->r_ctl.rc_rcvtime, __LINE__); + if (bbr->rc_lt_is_sampling || bbr->rc_lt_use_bw) { + /* + * Move forward the lt epoch + * so it won't count the truncated + * epoch. + */ + bbr->r_ctl.rc_lt_epoch++; + } + if (bbr->rc_bbr_state == BBR_STATE_STARTUP) { + /* + * Just like the policer detection code + * if we are in startup we must push + * forward the last startup epoch + * to hide the truncated PE. + */ + bbr->r_ctl.rc_bbr_last_startup_epoch++; + } + bbr->r_ctl.rc_cwnd_on_ent = tp->snd_cwnd; + ENTER_RECOVERY(tp->t_flags); + bbr->rc_tlp_rtx_out = 0; + bbr->r_ctl.recovery_lr = bbr->r_ctl.rc_pkt_epoch_loss_rate; + tcp_bbr_tso_size_check(bbr, bbr->r_ctl.rc_rcvtime); + if (bbr->rc_inp->inp_in_hpts && + ((bbr->r_ctl.rc_hpts_flags & PACE_TMR_RACK) == 0)) { + /* + * When we enter recovery, we need to restart + * any timers. This may mean we gain an agg + * early, which will be made up for at the last + * rxt out. + */ + bbr->rc_timer_first = 1; + bbr_timer_cancel(bbr, __LINE__, bbr->r_ctl.rc_rcvtime); + } + /* + * Calculate a new cwnd based on to the current + * delivery rate with no gain. We get the bdp + * without gaining it up like we normally would and + * we use the last cur_del_rate. + */ + if ((bbr->rc_use_google == 0) && + (bbr->r_ctl.bbr_rttprobe_gain_val || + (bbr->rc_bbr_state != BBR_STATE_PROBE_RTT))) { + tp->snd_cwnd = ctf_flight_size(tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)) + + (tp->t_maxseg - bbr->rc_last_options); + if (tp->snd_cwnd < get_min_cwnd(bbr)) { + /* We always gate to min cwnd */ + tp->snd_cwnd = get_min_cwnd(bbr); + } + bbr_log_type_cwndupd(bbr, 0, 0, 0, 14, 0, 0, __LINE__); + } + bbr_log_type_enter_rec(bbr, rsm->r_start); + } + break; + case CC_RTO_ERR: + TCPSTAT_INC(tcps_sndrexmitbad); + /* RTO was unnecessary, so reset everything. */ + bbr_reset_lt_bw_sampling(bbr, bbr->r_ctl.rc_rcvtime); + if (bbr->rc_bbr_state != BBR_STATE_PROBE_RTT) { + tp->snd_cwnd = tp->snd_cwnd_prev; + tp->snd_ssthresh = tp->snd_ssthresh_prev; + tp->snd_recover = tp->snd_recover_prev; + tp->snd_cwnd = max(tp->snd_cwnd, bbr->r_ctl.rc_cwnd_on_ent); + bbr_log_type_cwndupd(bbr, 0, 0, 0, 13, 0, 0, __LINE__); + } + tp->t_badrxtwin = 0; + break; + } +} + +/* + * Indicate whether this ack should be delayed. We can delay the ack if + * following conditions are met: + * - There is no delayed ack timer in progress. + * - Our last ack wasn't a 0-sized window. We never want to delay + * the ack that opens up a 0-sized window. + * - LRO wasn't used for this segment. We make sure by checking that the + * segment size is not larger than the MSS. + * - Delayed acks are enabled or this is a half-synchronized T/TCP + * connection. + * - The data being acked is less than a full segment (a stretch ack + * of more than a segment we should ack. + * - nsegs is 1 (if its more than that we received more than 1 ack). + */ +#define DELAY_ACK(tp, bbr, nsegs) \ + (((tp->t_flags & TF_RXWIN0SENT) == 0) && \ + ((bbr->bbr_segs_rcvd + nsegs) < tp->t_delayed_ack) && \ + (tp->t_delayed_ack || (tp->t_flags & TF_NEEDSYN))) + +/* + * Return the lowest RSM in the map of + * packets still in flight that is not acked. + * This should normally find on the first one + * since we remove packets from the send + * map after they are marked ACKED. + */ +static struct bbr_sendmap * +bbr_find_lowest_rsm(struct tcp_bbr *bbr) +{ + struct bbr_sendmap *rsm; + + /* + * Walk the time-order transmitted list looking for an rsm that is + * not acked. This will be the one that was sent the longest time + * ago that is still outstanding. + */ + TAILQ_FOREACH(rsm, &bbr->r_ctl.rc_tmap, r_tnext) { + if (rsm->r_flags & BBR_ACKED) { + continue; + } + goto finish; + } +finish: + return (rsm); +} + +static struct bbr_sendmap * +bbr_find_high_nonack(struct tcp_bbr *bbr, struct bbr_sendmap *rsm) +{ + struct bbr_sendmap *prsm; + + /* + * Walk the sequence order list backward until we hit and arrive at + * the highest seq not acked. In theory when this is called it + * should be the last segment (which it was not). + */ + prsm = rsm; + TAILQ_FOREACH_REVERSE_FROM(prsm, &bbr->r_ctl.rc_map, bbr_head, r_next) { + if (prsm->r_flags & (BBR_ACKED | BBR_HAS_FIN)) { + continue; + } + return (prsm); + } + return (NULL); +} + +/* + * Returns to the caller the number of microseconds that + * the packet can be outstanding before we think we + * should have had an ack returned. + */ +static uint32_t +bbr_calc_thresh_rack(struct tcp_bbr *bbr, uint32_t srtt, uint32_t cts, struct bbr_sendmap *rsm) +{ + /* + * lro is the flag we use to determine if we have seen reordering. + * If it gets set we have seen reordering. The reorder logic either + * works in one of two ways: + * + * If reorder-fade is configured, then we track the last time we saw + * re-ordering occur. If we reach the point where enough time as + * passed we no longer consider reordering has occuring. + * + * Or if reorder-face is 0, then once we see reordering we consider + * the connection to alway be subject to reordering and just set lro + * to 1. + * + * In the end if lro is non-zero we add the extra time for + * reordering in. + */ + int32_t lro; + uint32_t thresh, t_rxtcur; + + if (srtt == 0) + srtt = 1; + if (bbr->r_ctl.rc_reorder_ts) { + if (bbr->r_ctl.rc_reorder_fade) { + if (SEQ_GEQ(cts, bbr->r_ctl.rc_reorder_ts)) { + lro = cts - bbr->r_ctl.rc_reorder_ts; + if (lro == 0) { + /* + * No time as passed since the last + * reorder, mark it as reordering. + */ + lro = 1; + } + } else { + /* Negative time? */ + lro = 0; + } + if (lro > bbr->r_ctl.rc_reorder_fade) { + /* Turn off reordering seen too */ + bbr->r_ctl.rc_reorder_ts = 0; + lro = 0; + } + } else { + /* Reodering does not fade */ + lro = 1; + } + } else { + lro = 0; + } + thresh = srtt + bbr->r_ctl.rc_pkt_delay; + if (lro) { + /* It must be set, if not you get 1/4 rtt */ + if (bbr->r_ctl.rc_reorder_shift) + thresh += (srtt >> bbr->r_ctl.rc_reorder_shift); + else + thresh += (srtt >> 2); + } else { + thresh += 1000; + } + /* We don't let the rack timeout be above a RTO */ + if ((bbr->rc_tp)->t_srtt == 0) + t_rxtcur = BBR_INITIAL_RTO; + else + t_rxtcur = TICKS_2_USEC(bbr->rc_tp->t_rxtcur); + if (thresh > t_rxtcur) { + thresh = t_rxtcur; + } + /* And we don't want it above the RTO max either */ + if (thresh > (((uint32_t)bbr->rc_max_rto_sec) * USECS_IN_SECOND)) { + thresh = (((uint32_t)bbr->rc_max_rto_sec) * USECS_IN_SECOND); + } + bbr_log_thresh_choice(bbr, cts, thresh, lro, srtt, rsm, BBR_TO_FRM_RACK); + return (thresh); +} + +/* + * Return to the caller the amount of time in mico-seconds + * that should be used for the TLP timer from the last + * send time of this packet. + */ +static uint32_t +bbr_calc_thresh_tlp(struct tcpcb *tp, struct tcp_bbr *bbr, + struct bbr_sendmap *rsm, uint32_t srtt, + uint32_t cts) +{ + uint32_t thresh, len, maxseg, t_rxtcur; + struct bbr_sendmap *prsm; + + if (srtt == 0) + srtt = 1; + if (bbr->rc_tlp_threshold) + thresh = srtt + (srtt / bbr->rc_tlp_threshold); + else + thresh = (srtt * 2); + maxseg = tp->t_maxseg - bbr->rc_last_options; + /* Get the previous sent packet, if any */ + len = rsm->r_end - rsm->r_start; + + /* 2.1 behavior */ + prsm = TAILQ_PREV(rsm, bbr_head, r_tnext); + if (prsm && (len <= maxseg)) { + /* + * Two packets outstanding, thresh should be (2*srtt) + + * possible inter-packet delay (if any). + */ + uint32_t inter_gap = 0; + int idx, nidx; + + idx = rsm->r_rtr_cnt - 1; + nidx = prsm->r_rtr_cnt - 1; + if (TSTMP_GEQ(rsm->r_tim_lastsent[nidx], prsm->r_tim_lastsent[idx])) { + /* Yes it was sent later (or at the same time) */ + inter_gap = rsm->r_tim_lastsent[idx] - prsm->r_tim_lastsent[nidx]; + } + thresh += inter_gap; + } else if (len <= maxseg) { + /* + * Possibly compensate for delayed-ack. + */ + uint32_t alt_thresh; + + alt_thresh = srtt + (srtt / 2) + bbr_delayed_ack_time; + if (alt_thresh > thresh) + thresh = alt_thresh; + } + /* Not above the current RTO */ + if (tp->t_srtt == 0) + t_rxtcur = BBR_INITIAL_RTO; + else + t_rxtcur = TICKS_2_USEC(tp->t_rxtcur); + + bbr_log_thresh_choice(bbr, cts, thresh, t_rxtcur, srtt, rsm, BBR_TO_FRM_TLP); + /* Not above an RTO */ + if (thresh > t_rxtcur) { + thresh = t_rxtcur; + } + /* Not above a RTO max */ + if (thresh > (((uint32_t)bbr->rc_max_rto_sec) * USECS_IN_SECOND)) { + thresh = (((uint32_t)bbr->rc_max_rto_sec) * USECS_IN_SECOND); + } + /* And now apply the user TLP min */ + if (thresh < bbr_tlp_min) { + thresh = bbr_tlp_min; + } + return (thresh); +} + +/* + * Return one of three RTTs to use (in microseconds). + */ +static __inline uint32_t +bbr_get_rtt(struct tcp_bbr *bbr, int32_t rtt_type) +{ + uint32_t f_rtt; + uint32_t srtt; + + f_rtt = get_filter_value_small(&bbr->r_ctl.rc_rttprop); + if (get_filter_value_small(&bbr->r_ctl.rc_rttprop) == 0xffffffff) { + /* We have no rtt at all */ + if (bbr->rc_tp->t_srtt == 0) + f_rtt = BBR_INITIAL_RTO; + else + f_rtt = (TICKS_2_USEC(bbr->rc_tp->t_srtt) >> TCP_RTT_SHIFT); + /* + * Since we don't know how good the rtt is apply a + * delayed-ack min + */ + if (f_rtt < bbr_delayed_ack_time) { + f_rtt = bbr_delayed_ack_time; + } + } + /* Take the filter version or last measured pkt-rtt */ + if (rtt_type == BBR_RTT_PROP) { + srtt = f_rtt; + } else if (rtt_type == BBR_RTT_PKTRTT) { + if (bbr->r_ctl.rc_pkt_epoch_rtt) { + srtt = bbr->r_ctl.rc_pkt_epoch_rtt; + } else { + /* No pkt rtt yet */ + srtt = f_rtt; + } + } else if (rtt_type == BBR_RTT_RACK) { + srtt = bbr->r_ctl.rc_last_rtt; + /* We need to add in any internal delay for our timer */ + if (bbr->rc_ack_was_delayed) + srtt += bbr->r_ctl.rc_ack_hdwr_delay; + } else if (rtt_type == BBR_SRTT) { + srtt = (TICKS_2_USEC(bbr->rc_tp->t_srtt) >> TCP_RTT_SHIFT); + } else { + /* TSNH */ + srtt = f_rtt; +#ifdef BBR_INVARIANTS + panic("Unknown rtt request type %d", rtt_type); +#endif + } + return (srtt); +} + +static int +bbr_is_lost(struct tcp_bbr *bbr, struct bbr_sendmap *rsm, uint32_t cts) +{ + uint32_t thresh; + + + thresh = bbr_calc_thresh_rack(bbr, bbr_get_rtt(bbr, BBR_RTT_RACK), + cts, rsm); + if ((cts - rsm->r_tim_lastsent[(rsm->r_rtr_cnt - 1)]) >= thresh) { + /* It is lost (past time) */ + return (1); + } + return (0); +} + +/* + * Return a sendmap if we need to retransmit something. + */ +static struct bbr_sendmap * +bbr_check_recovery_mode(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts) +{ + /* + * Check to see that we don't need to fall into recovery. We will + * need to do so if our oldest transmit is past the time we should + * have had an ack. + */ + + struct bbr_sendmap *rsm; + int32_t idx; + + if (TAILQ_EMPTY(&bbr->r_ctl.rc_map)) { + /* Nothing outstanding that we know of */ + return (NULL); + } + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_tmap); + if (rsm == NULL) { + /* Nothing in the transmit map */ + return (NULL); + } + if (tp->t_flags & TF_SENTFIN) { + /* Fin restricted, don't find anything once a fin is sent */ + return (NULL); + } + if (rsm->r_flags & BBR_ACKED) { + /* + * Ok the first one is acked (this really should not happen + * since we remove the from the tmap once they are acked) + */ + rsm = bbr_find_lowest_rsm(bbr); + if (rsm == NULL) + return (NULL); + } + idx = rsm->r_rtr_cnt - 1; + if (SEQ_LEQ(cts, rsm->r_tim_lastsent[idx])) { + /* Send timestamp is the same or less? can't be ready */ + return (NULL); + } + /* Get our RTT time */ + if (bbr_is_lost(bbr, rsm, cts) && + ((rsm->r_dupack >= DUP_ACK_THRESHOLD) || + (rsm->r_flags & BBR_SACK_PASSED))) { + if ((rsm->r_flags & BBR_MARKED_LOST) == 0) { + rsm->r_flags |= BBR_MARKED_LOST; + bbr->r_ctl.rc_lost += rsm->r_end - rsm->r_start; + bbr->r_ctl.rc_lost_bytes += rsm->r_end - rsm->r_start; + } + bbr_cong_signal(tp, NULL, CC_NDUPACK, rsm); +#ifdef BBR_INVARIANTS + if ((rsm->r_end - rsm->r_start) == 0) + panic("tp:%p bbr:%p rsm:%p length is 0?", tp, bbr, rsm); +#endif + return (rsm); + } + return (NULL); +} + +/* + * RACK Timer, here we simply do logging and house keeping. + * the normal bbr_output_wtime() function will call the + * appropriate thing to check if we need to do a RACK retransmit. + * We return 1, saying don't proceed with bbr_output_wtime only + * when all timers have been stopped (destroyed PCB?). + */ +static int +bbr_timeout_rack(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts) +{ + /* + * This timer simply provides an internal trigger to send out data. + * The check_recovery_mode call will see if there are needed + * retransmissions, if so we will enter fast-recovery. The output + * call may or may not do the same thing depending on sysctl + * settings. + */ + uint32_t lost; + + if (bbr->rc_all_timers_stopped) { + return (1); + } + if (TSTMP_LT(cts, bbr->r_ctl.rc_timer_exp)) { + /* Its not time yet */ + return (0); + } + BBR_STAT_INC(bbr_to_tot); + lost = bbr->r_ctl.rc_lost; + if (bbr->r_state && (bbr->r_state != tp->t_state)) + bbr_set_state(tp, bbr, 0); + bbr_log_to_event(bbr, cts, BBR_TO_FRM_RACK); + if (bbr->r_ctl.rc_resend == NULL) { + /* Lets do the check here */ + bbr->r_ctl.rc_resend = bbr_check_recovery_mode(tp, bbr, cts); + } + if (bbr_policer_call_from_rack_to) + bbr_lt_bw_sampling(bbr, cts, (bbr->r_ctl.rc_lost > lost)); + bbr->r_ctl.rc_hpts_flags &= ~PACE_TMR_RACK; + return (0); +} + +static __inline void +bbr_clone_rsm(struct tcp_bbr *bbr, struct bbr_sendmap *nrsm, struct bbr_sendmap *rsm, uint32_t start) +{ + int idx; + + nrsm->r_start = start; + nrsm->r_end = rsm->r_end; + nrsm->r_rtr_cnt = rsm->r_rtr_cnt; + nrsm->r_flags = rsm->r_flags; + /* We don't transfer forward the SYN flag */ + nrsm->r_flags &= ~BBR_HAS_SYN; + /* We move forward the FIN flag, not that this should happen */ + rsm->r_flags &= ~BBR_HAS_FIN; + nrsm->r_dupack = rsm->r_dupack; + nrsm->r_rtr_bytes = 0; + nrsm->r_is_gain = rsm->r_is_gain; + nrsm->r_is_drain = rsm->r_is_drain; + nrsm->r_delivered = rsm->r_delivered; + nrsm->r_ts_valid = rsm->r_ts_valid; + nrsm->r_del_ack_ts = rsm->r_del_ack_ts; + nrsm->r_del_time = rsm->r_del_time; + nrsm->r_app_limited = rsm->r_app_limited; + nrsm->r_first_sent_time = rsm->r_first_sent_time; + nrsm->r_flight_at_send = rsm->r_flight_at_send; + /* We split a piece the lower section looses any just_ret flag. */ + nrsm->r_bbr_state = rsm->r_bbr_state; + for (idx = 0; idx < nrsm->r_rtr_cnt; idx++) { + nrsm->r_tim_lastsent[idx] = rsm->r_tim_lastsent[idx]; + } + rsm->r_end = nrsm->r_start; + idx = min((bbr->rc_tp->t_maxseg - bbr->rc_last_options), bbr->r_ctl.rc_pace_max_segs); + idx /= 8; + /* Check if we got too small */ + if ((rsm->r_is_smallmap == 0) && + ((rsm->r_end - rsm->r_start) <= idx)) { + bbr->r_ctl.rc_num_small_maps_alloced++; + rsm->r_is_smallmap = 1; + } + /* Check the new one as well */ + if ((nrsm->r_end - nrsm->r_start) <= idx) { + bbr->r_ctl.rc_num_small_maps_alloced++; + nrsm->r_is_smallmap = 1; + } +} + +static int +bbr_sack_mergable(struct bbr_sendmap *at, + uint32_t start, uint32_t end) +{ + /* + * Given a sack block defined by + * start and end, and a current postion + * at. Return 1 if either side of at + * would show that the block is mergable + * to that side. A block to be mergable + * must have overlap with the start/end + * and be in the SACK'd state. + */ + struct bbr_sendmap *l_rsm; + struct bbr_sendmap *r_rsm; + + /* first get the either side blocks */ + l_rsm = TAILQ_PREV(at, bbr_head, r_next); + r_rsm = TAILQ_NEXT(at, r_next); + if (l_rsm && (l_rsm->r_flags & BBR_ACKED)) { + /* Potentially mergeable */ + if ((l_rsm->r_end == start) || + (SEQ_LT(start, l_rsm->r_end) && + SEQ_GT(end, l_rsm->r_end))) { + /* + * map blk |------| + * sack blk |------| + * + * map blk |------| + * sack blk |------| + */ + return (1); + } + } + if (r_rsm && (r_rsm->r_flags & BBR_ACKED)) { + /* Potentially mergeable */ + if ((r_rsm->r_start == end) || + (SEQ_LT(start, r_rsm->r_start) && + SEQ_GT(end, r_rsm->r_start))) { + /* + * map blk |---------| + * sack blk |----| + * + * map blk |---------| + * sack blk |-------| + */ + return (1); + } + } + return (0); +} + +static struct bbr_sendmap * +bbr_merge_rsm(struct tcp_bbr *bbr, + struct bbr_sendmap *l_rsm, + struct bbr_sendmap *r_rsm) +{ + /* + * We are merging two ack'd RSM's, + * the l_rsm is on the left (lower seq + * values) and the r_rsm is on the right + * (higher seq value). The simplest way + * to merge these is to move the right + * one into the left. I don't think there + * is any reason we need to try to find + * the oldest (or last oldest retransmitted). + */ + l_rsm->r_end = r_rsm->r_end; + if (l_rsm->r_dupack < r_rsm->r_dupack) + l_rsm->r_dupack = r_rsm->r_dupack; + if (r_rsm->r_rtr_bytes) + l_rsm->r_rtr_bytes += r_rsm->r_rtr_bytes; + if (r_rsm->r_in_tmap) { + /* This really should not happen */ + TAILQ_REMOVE(&bbr->r_ctl.rc_tmap, r_rsm, r_tnext); + } + if (r_rsm->r_app_limited) + l_rsm->r_app_limited = r_rsm->r_app_limited; + /* Now the flags */ + if (r_rsm->r_flags & BBR_HAS_FIN) + l_rsm->r_flags |= BBR_HAS_FIN; + if (r_rsm->r_flags & BBR_TLP) + l_rsm->r_flags |= BBR_TLP; + if (r_rsm->r_flags & BBR_RWND_COLLAPSED) + l_rsm->r_flags |= BBR_RWND_COLLAPSED; + if (r_rsm->r_flags & BBR_MARKED_LOST) { + /* This really should not happen */ + bbr->r_ctl.rc_lost_bytes -= r_rsm->r_end - r_rsm->r_start; + } + TAILQ_REMOVE(&bbr->r_ctl.rc_map, r_rsm, r_next); + if ((r_rsm->r_limit_type == 0) && (l_rsm->r_limit_type != 0)) { + /* Transfer the split limit to the map we free */ + r_rsm->r_limit_type = l_rsm->r_limit_type; + l_rsm->r_limit_type = 0; + } + bbr_free(bbr, r_rsm); + return(l_rsm); +} + +/* + * TLP Timer, here we simply setup what segment we want to + * have the TLP expire on, the normal bbr_output_wtime() will then + * send it out. + * + * We return 1, saying don't proceed with bbr_output_wtime only + * when all timers have been stopped (destroyed PCB?). + */ +static int +bbr_timeout_tlp(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts) +{ + /* + * Tail Loss Probe. + */ + struct bbr_sendmap *rsm = NULL; + struct socket *so; + uint32_t amm; + uint32_t out, avail; + uint32_t maxseg; + int collapsed_win = 0; + + if (bbr->rc_all_timers_stopped) { + return (1); + } + if (TSTMP_LT(cts, bbr->r_ctl.rc_timer_exp)) { + /* Its not time yet */ + return (0); + } + if (bbr_progress_timeout_check(bbr)) { + tcp_set_inp_to_drop(bbr->rc_inp, ETIMEDOUT); + return (1); + } + /* Did we somehow get into persists? */ + if (bbr->rc_in_persist) { + return (0); + } + if (bbr->r_state && (bbr->r_state != tp->t_state)) + bbr_set_state(tp, bbr, 0); + BBR_STAT_INC(bbr_tlp_tot); + maxseg = tp->t_maxseg - bbr->rc_last_options; +#ifdef KERN_TLS + if (bbr->rc_inp->inp_socket->so_snd.sb_flags & SB_TLS_IFNET) { + /* + * For hardware TLS we do *not* want to send + * new data. + */ + goto need_retran; + } +#endif + /* + * A TLP timer has expired. We have been idle for 2 rtts. So we now + * need to figure out how to force a full MSS segment out. + */ + so = tp->t_inpcb->inp_socket; + avail = sbavail(&so->so_snd); + out = ctf_outstanding(tp); + if (out > tp->snd_wnd) { + /* special case, we need a retransmission */ + collapsed_win = 1; + goto need_retran; + } + if (avail > out) { + /* New data is available */ + amm = avail - out; + if (amm > maxseg) { + amm = maxseg; + } else if ((amm < maxseg) && ((tp->t_flags & TF_NODELAY) == 0)) { + /* not enough to fill a MTU and no-delay is off */ + goto need_retran; + } + /* Set the send-new override */ + if ((out + amm) <= tp->snd_wnd) { + bbr->rc_tlp_new_data = 1; + } else { + goto need_retran; + } + bbr->r_ctl.rc_tlp_seg_send_cnt = 0; + bbr->r_ctl.rc_last_tlp_seq = tp->snd_max; + bbr->r_ctl.rc_tlp_send = NULL; + /* cap any slots */ + BBR_STAT_INC(bbr_tlp_newdata); + goto send; + } +need_retran: + /* + * Ok we need to arrange the last un-acked segment to be re-sent, or + * optionally the first un-acked segment. + */ + if (collapsed_win == 0) { + rsm = TAILQ_LAST_FAST(&bbr->r_ctl.rc_map, bbr_sendmap, r_next); + if (rsm && (BBR_ACKED | BBR_HAS_FIN)) { + rsm = bbr_find_high_nonack(bbr, rsm); + } + if (rsm == NULL) { + goto restore; + } + } else { + /* + * We must find the last segment + * that was acceptable by the client. + */ + TAILQ_FOREACH_REVERSE(rsm, &bbr->r_ctl.rc_map, bbr_head, r_next) { + if ((rsm->r_flags & BBR_RWND_COLLAPSED) == 0) { + /* Found one */ + break; + } + } + if (rsm == NULL) { + /* None? if so send the first */ + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map); + if (rsm == NULL) + goto restore; + } + } + if ((rsm->r_end - rsm->r_start) > maxseg) { + /* + * We need to split this the last segment in two. + */ + struct bbr_sendmap *nrsm; + + nrsm = bbr_alloc_full_limit(bbr); + if (nrsm == NULL) { + /* + * We can't get memory to split, we can either just + * not split it. Or retransmit the whole piece, lets + * do the large send (BTLP :-) ). + */ + goto go_for_it; + } + bbr_clone_rsm(bbr, nrsm, rsm, (rsm->r_end - maxseg)); + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_map, rsm, nrsm, r_next); + if (rsm->r_in_tmap) { + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_tmap, rsm, nrsm, r_tnext); + nrsm->r_in_tmap = 1; + } + rsm->r_flags &= (~BBR_HAS_FIN); + rsm = nrsm; + } +go_for_it: + bbr->r_ctl.rc_tlp_send = rsm; + bbr->rc_tlp_rtx_out = 1; + if (rsm->r_start == bbr->r_ctl.rc_last_tlp_seq) { + bbr->r_ctl.rc_tlp_seg_send_cnt++; + tp->t_rxtshift++; + } else { + bbr->r_ctl.rc_last_tlp_seq = rsm->r_start; + bbr->r_ctl.rc_tlp_seg_send_cnt = 1; + } +send: + if (bbr->r_ctl.rc_tlp_seg_send_cnt > bbr_tlp_max_resend) { + /* + * Can't [re]/transmit a segment we have retranmitted the + * max times. We need the retransmit timer to take over. + */ +restore: + bbr->rc_tlp_new_data = 0; + bbr->r_ctl.rc_tlp_send = NULL; + if (rsm) + rsm->r_flags &= ~BBR_TLP; + BBR_STAT_INC(bbr_tlp_retran_fail); + return (0); + } else if (rsm) { + rsm->r_flags |= BBR_TLP; + } + if (rsm && (rsm->r_start == bbr->r_ctl.rc_last_tlp_seq) && + (bbr->r_ctl.rc_tlp_seg_send_cnt > bbr_tlp_max_resend)) { + /* + * We have retransmitted to many times for TLP. Switch to + * the regular RTO timer + */ + goto restore; + } + bbr_log_to_event(bbr, cts, BBR_TO_FRM_TLP); + bbr->r_ctl.rc_hpts_flags &= ~PACE_TMR_TLP; + return (0); +} + +/* + * Delayed ack Timer, here we simply need to setup the + * ACK_NOW flag and remove the DELACK flag. From there + * the output routine will send the ack out. + * + * We only return 1, saying don't proceed, if all timers + * are stopped (destroyed PCB?). + */ +static int +bbr_timeout_delack(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts) +{ + if (bbr->rc_all_timers_stopped) { + return (1); + } + bbr_log_to_event(bbr, cts, BBR_TO_FRM_DELACK); + tp->t_flags &= ~TF_DELACK; + tp->t_flags |= TF_ACKNOW; + TCPSTAT_INC(tcps_delack); + bbr->r_ctl.rc_hpts_flags &= ~PACE_TMR_DELACK; + return (0); +} + +/* + * Persists timer, here we simply need to setup the + * FORCE-DATA flag the output routine will send + * the one byte send. + * + * We only return 1, saying don't proceed, if all timers + * are stopped (destroyed PCB?). + */ +static int +bbr_timeout_persist(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts) +{ + struct tcptemp *t_template; + int32_t retval = 1; + + if (bbr->rc_all_timers_stopped) { + return (1); + } + if (bbr->rc_in_persist == 0) + return (0); + KASSERT(tp->t_inpcb != NULL, + ("%s: tp %p tp->t_inpcb == NULL", __func__, tp)); + /* + * Persistence timer into zero window. Force a byte to be output, if + * possible. + */ + bbr_log_to_event(bbr, cts, BBR_TO_FRM_PERSIST); + bbr->r_ctl.rc_hpts_flags &= ~PACE_TMR_PERSIT; + TCPSTAT_INC(tcps_persisttimeo); + /* + * Have we exceeded the user specified progress time? + */ + if (bbr_progress_timeout_check(bbr)) { + tcp_set_inp_to_drop(bbr->rc_inp, ETIMEDOUT); + goto out; + } + /* + * Hack: if the peer is dead/unreachable, we do not time out if the + * window is closed. After a full backoff, drop the connection if + * the idle time (no responses to probes) reaches the maximum + * backoff that we would use if retransmitting. + */ + if (tp->t_rxtshift == TCP_MAXRXTSHIFT && + (ticks - tp->t_rcvtime >= tcp_maxpersistidle || + ticks - tp->t_rcvtime >= TCP_REXMTVAL(tp) * tcp_totbackoff)) { + TCPSTAT_INC(tcps_persistdrop); + tcp_set_inp_to_drop(bbr->rc_inp, ETIMEDOUT); + goto out; + } + if ((sbavail(&bbr->rc_inp->inp_socket->so_snd) == 0) && + tp->snd_una == tp->snd_max) { + bbr_exit_persist(tp, bbr, cts, __LINE__); + retval = 0; + goto out; + } + /* + * If the user has closed the socket then drop a persisting + * connection after a much reduced timeout. + */ + if (tp->t_state > TCPS_CLOSE_WAIT && + (ticks - tp->t_rcvtime) >= TCPTV_PERSMAX) { + TCPSTAT_INC(tcps_persistdrop); + tcp_set_inp_to_drop(bbr->rc_inp, ETIMEDOUT); + goto out; + } + t_template = tcpip_maketemplate(bbr->rc_inp); + if (t_template) { + tcp_respond(tp, t_template->tt_ipgen, + &t_template->tt_t, (struct mbuf *)NULL, + tp->rcv_nxt, tp->snd_una - 1, 0); + /* This sends an ack */ + if (tp->t_flags & TF_DELACK) + tp->t_flags &= ~TF_DELACK; + free(t_template, M_TEMP); + } + if (tp->t_rxtshift < TCP_MAXRXTSHIFT) + tp->t_rxtshift++; + bbr_start_hpts_timer(bbr, tp, cts, 3, 0, 0); +out: + return (retval); +} + +/* + * If a keepalive goes off, we had no other timers + * happening. We always return 1 here since this + * routine either drops the connection or sends + * out a segment with respond. + */ +static int +bbr_timeout_keepalive(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts) +{ + struct tcptemp *t_template; + struct inpcb *inp; + + if (bbr->rc_all_timers_stopped) { + return (1); + } + bbr->r_ctl.rc_hpts_flags &= ~PACE_TMR_KEEP; + inp = tp->t_inpcb; + bbr_log_to_event(bbr, cts, BBR_TO_FRM_KEEP); + /* + * Keep-alive timer went off; send something or drop connection if + * idle for too long. + */ + TCPSTAT_INC(tcps_keeptimeo); + if (tp->t_state < TCPS_ESTABLISHED) + goto dropit; + if ((tcp_always_keepalive || inp->inp_socket->so_options & SO_KEEPALIVE) && + tp->t_state <= TCPS_CLOSING) { + if (ticks - tp->t_rcvtime >= TP_KEEPIDLE(tp) + TP_MAXIDLE(tp)) + goto dropit; + /* + * Send a packet designed to force a response if the peer is + * up and reachable: either an ACK if the connection is + * still alive, or an RST if the peer has closed the + * connection due to timeout or reboot. Using sequence + * number tp->snd_una-1 causes the transmitted zero-length + * segment to lie outside the receive window; by the + * protocol spec, this requires the correspondent TCP to + * respond. + */ + TCPSTAT_INC(tcps_keepprobe); + t_template = tcpip_maketemplate(inp); + if (t_template) { + tcp_respond(tp, t_template->tt_ipgen, + &t_template->tt_t, (struct mbuf *)NULL, + tp->rcv_nxt, tp->snd_una - 1, 0); + free(t_template, M_TEMP); + } + } + bbr_start_hpts_timer(bbr, tp, cts, 4, 0, 0); + return (1); +dropit: + TCPSTAT_INC(tcps_keepdrops); + tcp_set_inp_to_drop(bbr->rc_inp, ETIMEDOUT); + return (1); +} + +/* + * Retransmit helper function, clear up all the ack + * flags and take care of important book keeping. + */ +static void +bbr_remxt_tmr(struct tcpcb *tp) +{ + /* + * The retransmit timer went off, all sack'd blocks must be + * un-acked. + */ + struct bbr_sendmap *rsm, *trsm = NULL; + struct tcp_bbr *bbr; + uint32_t cts, lost; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + cts = tcp_get_usecs(&bbr->rc_tv); + lost = bbr->r_ctl.rc_lost; + if (bbr->r_state && (bbr->r_state != tp->t_state)) + bbr_set_state(tp, bbr, 0); + + TAILQ_FOREACH(rsm, &bbr->r_ctl.rc_map, r_next) { + if (rsm->r_flags & BBR_ACKED) { + uint32_t old_flags; + + rsm->r_dupack = 0; + if (rsm->r_in_tmap == 0) { + /* We must re-add it back to the tlist */ + if (trsm == NULL) { + TAILQ_INSERT_HEAD(&bbr->r_ctl.rc_tmap, rsm, r_tnext); + } else { + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_tmap, trsm, rsm, r_tnext); + } + rsm->r_in_tmap = 1; + } + old_flags = rsm->r_flags; + rsm->r_flags |= BBR_RXT_CLEARED; + rsm->r_flags &= ~(BBR_ACKED | BBR_SACK_PASSED | BBR_WAS_SACKPASS); + bbr_log_type_rsmclear(bbr, cts, rsm, old_flags, __LINE__); + } else { + if ((rsm->r_flags & BBR_MARKED_LOST) == 0) { + bbr->r_ctl.rc_lost += rsm->r_end - rsm->r_start; + bbr->r_ctl.rc_lost_bytes += rsm->r_end - rsm->r_start; + } + if (bbr_marks_rxt_sack_passed) { + /* + * With this option, we will rack out + * in 1ms increments the rest of the packets. + */ + rsm->r_flags |= BBR_SACK_PASSED | BBR_MARKED_LOST; + rsm->r_flags &= ~BBR_WAS_SACKPASS; + } else { + /* + * With this option we only mark them lost + * and remove all sack'd markings. We will run + * another RXT or a TLP. This will cause + * us to eventually send more based on what + * ack's come in. + */ + rsm->r_flags |= BBR_MARKED_LOST; + rsm->r_flags &= ~BBR_WAS_SACKPASS; + rsm->r_flags &= ~BBR_SACK_PASSED; + } + } + trsm = rsm; + } + bbr->r_ctl.rc_resend = TAILQ_FIRST(&bbr->r_ctl.rc_map); + /* Clear the count (we just un-acked them) */ + bbr_log_to_event(bbr, cts, BBR_TO_FRM_TMR); + bbr->rc_tlp_new_data = 0; + bbr->r_ctl.rc_tlp_seg_send_cnt = 0; + /* zap the behindness on a rxt */ + bbr->r_ctl.rc_hptsi_agg_delay = 0; + bbr->r_agg_early_set = 0; + bbr->r_ctl.rc_agg_early = 0; + bbr->rc_tlp_rtx_out = 0; + bbr->r_ctl.rc_sacked = 0; + bbr->r_ctl.rc_sacklast = NULL; + bbr->r_timer_override = 1; + bbr_lt_bw_sampling(bbr, cts, (bbr->r_ctl.rc_lost > lost)); +} + +/* + * Re-transmit timeout! If we drop the PCB we will return 1, otherwise + * we will setup to retransmit the lowest seq number outstanding. + */ +static int +bbr_timeout_rxt(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts) +{ + int32_t rexmt; + int32_t retval = 0; + + bbr->r_ctl.rc_hpts_flags &= ~PACE_TMR_RXT; + if (bbr->rc_all_timers_stopped) { + return (1); + } + if (TCPS_HAVEESTABLISHED(tp->t_state) && + (tp->snd_una == tp->snd_max)) { + /* Nothing outstanding .. nothing to do */ + return (0); + } + /* + * Retransmission timer went off. Message has not been acked within + * retransmit interval. Back off to a longer retransmit interval + * and retransmit one segment. + */ + if (bbr_progress_timeout_check(bbr)) { + retval = 1; + tcp_set_inp_to_drop(bbr->rc_inp, ETIMEDOUT); + goto out; + } + bbr_remxt_tmr(tp); + if ((bbr->r_ctl.rc_resend == NULL) || + ((bbr->r_ctl.rc_resend->r_flags & BBR_RWND_COLLAPSED) == 0)) { + /* + * If the rwnd collapsed on + * the one we are retransmitting + * it does not count against the + * rxt count. + */ + tp->t_rxtshift++; + } + if (tp->t_rxtshift > TCP_MAXRXTSHIFT) { + tp->t_rxtshift = TCP_MAXRXTSHIFT; + TCPSTAT_INC(tcps_timeoutdrop); + retval = 1; + tcp_set_inp_to_drop(bbr->rc_inp, + (tp->t_softerror ? (uint16_t) tp->t_softerror : ETIMEDOUT)); + goto out; + } + if (tp->t_state == TCPS_SYN_SENT) { + /* + * If the SYN was retransmitted, indicate CWND to be limited + * to 1 segment in cc_conn_init(). + */ + tp->snd_cwnd = 1; + } else if (tp->t_rxtshift == 1) { + /* + * first retransmit; record ssthresh and cwnd so they can be + * recovered if this turns out to be a "bad" retransmit. A + * retransmit is considered "bad" if an ACK for this segment + * is received within RTT/2 interval; the assumption here is + * that the ACK was already in flight. See "On Estimating + * End-to-End Network Path Properties" by Allman and Paxson + * for more details. + */ + tp->snd_cwnd = tp->t_maxseg - bbr->rc_last_options; + if (!IN_RECOVERY(tp->t_flags)) { + tp->snd_cwnd_prev = tp->snd_cwnd; + tp->snd_ssthresh_prev = tp->snd_ssthresh; + tp->snd_recover_prev = tp->snd_recover; + tp->t_badrxtwin = ticks + (tp->t_srtt >> (TCP_RTT_SHIFT + 1)); + tp->t_flags |= TF_PREVVALID; + } else { + tp->t_flags &= ~TF_PREVVALID; + } + tp->snd_cwnd = tp->t_maxseg - bbr->rc_last_options; + } else { + tp->snd_cwnd = tp->t_maxseg - bbr->rc_last_options; + tp->t_flags &= ~TF_PREVVALID; + } + TCPSTAT_INC(tcps_rexmttimeo); + if ((tp->t_state == TCPS_SYN_SENT) || + (tp->t_state == TCPS_SYN_RECEIVED)) + rexmt = USEC_2_TICKS(BBR_INITIAL_RTO) * tcp_backoff[tp->t_rxtshift]; + else + rexmt = TCP_REXMTVAL(tp) * tcp_backoff[tp->t_rxtshift]; + TCPT_RANGESET(tp->t_rxtcur, rexmt, + MSEC_2_TICKS(bbr->r_ctl.rc_min_rto_ms), + MSEC_2_TICKS(((uint32_t)bbr->rc_max_rto_sec) * 1000)); + /* + * We enter the path for PLMTUD if connection is established or, if + * connection is FIN_WAIT_1 status, reason for the last is that if + * amount of data we send is very small, we could send it in couple + * of packets and process straight to FIN. In that case we won't + * catch ESTABLISHED state. + */ + if (V_tcp_pmtud_blackhole_detect && (((tp->t_state == TCPS_ESTABLISHED)) + || (tp->t_state == TCPS_FIN_WAIT_1))) { +#ifdef INET6 + int32_t isipv6; +#endif + + /* + * Idea here is that at each stage of mtu probe (usually, + * 1448 -> 1188 -> 524) should be given 2 chances to recover + * before further clamping down. 'tp->t_rxtshift % 2 == 0' + * should take care of that. + */ + if (((tp->t_flags2 & (TF2_PLPMTU_PMTUD | TF2_PLPMTU_MAXSEGSNT)) == + (TF2_PLPMTU_PMTUD | TF2_PLPMTU_MAXSEGSNT)) && + (tp->t_rxtshift >= 2 && tp->t_rxtshift < 6 && + tp->t_rxtshift % 2 == 0)) { + /* + * Enter Path MTU Black-hole Detection mechanism: - + * Disable Path MTU Discovery (IP "DF" bit). - + * Reduce MTU to lower value than what we negotiated + * with peer. + */ + if ((tp->t_flags2 & TF2_PLPMTU_BLACKHOLE) == 0) { + /* + * Record that we may have found a black + * hole. + */ + tp->t_flags2 |= TF2_PLPMTU_BLACKHOLE; + /* Keep track of previous MSS. */ + tp->t_pmtud_saved_maxseg = tp->t_maxseg; + } + /* + * Reduce the MSS to blackhole value or to the + * default in an attempt to retransmit. + */ +#ifdef INET6 + isipv6 = bbr->r_is_v6; + if (isipv6 && + tp->t_maxseg > V_tcp_v6pmtud_blackhole_mss) { + /* Use the sysctl tuneable blackhole MSS. */ + tp->t_maxseg = V_tcp_v6pmtud_blackhole_mss; + TCPSTAT_INC(tcps_pmtud_blackhole_activated); + } else if (isipv6) { + /* Use the default MSS. */ + tp->t_maxseg = V_tcp_v6mssdflt; + /* + * Disable Path MTU Discovery when we switch + * to minmss. + */ + tp->t_flags2 &= ~TF2_PLPMTU_PMTUD; + TCPSTAT_INC(tcps_pmtud_blackhole_activated_min_mss); + } +#endif +#if defined(INET6) && defined(INET) + else +#endif +#ifdef INET + if (tp->t_maxseg > V_tcp_pmtud_blackhole_mss) { + /* Use the sysctl tuneable blackhole MSS. */ + tp->t_maxseg = V_tcp_pmtud_blackhole_mss; + TCPSTAT_INC(tcps_pmtud_blackhole_activated); + } else { + /* Use the default MSS. */ + tp->t_maxseg = V_tcp_mssdflt; + /* + * Disable Path MTU Discovery when we switch + * to minmss. + */ + tp->t_flags2 &= ~TF2_PLPMTU_PMTUD; + TCPSTAT_INC(tcps_pmtud_blackhole_activated_min_mss); + } +#endif + } else { + /* + * If further retransmissions are still unsuccessful + * with a lowered MTU, maybe this isn't a blackhole + * and we restore the previous MSS and blackhole + * detection flags. The limit '6' is determined by + * giving each probe stage (1448, 1188, 524) 2 + * chances to recover. + */ + if ((tp->t_flags2 & TF2_PLPMTU_BLACKHOLE) && + (tp->t_rxtshift >= 6)) { + tp->t_flags2 |= TF2_PLPMTU_PMTUD; + tp->t_flags2 &= ~TF2_PLPMTU_BLACKHOLE; + tp->t_maxseg = tp->t_pmtud_saved_maxseg; + TCPSTAT_INC(tcps_pmtud_blackhole_failed); + } + } + } + /* + * Disable RFC1323 and SACK if we haven't got any response to our + * third SYN to work-around some broken terminal servers (most of + * which have hopefully been retired) that have bad VJ header + * compression code which trashes TCP segments containing + * unknown-to-them TCP options. + */ + if (tcp_rexmit_drop_options && (tp->t_state == TCPS_SYN_SENT) && + (tp->t_rxtshift == 3)) + tp->t_flags &= ~(TF_REQ_SCALE | TF_REQ_TSTMP | TF_SACK_PERMIT); + /* + * If we backed off this far, our srtt estimate is probably bogus. + * Clobber it so we'll take the next rtt measurement as our srtt; + * move the current srtt into rttvar to keep the current retransmit + * times until then. + */ + if (tp->t_rxtshift > TCP_MAXRXTSHIFT / 4) { +#ifdef INET6 + if (bbr->r_is_v6) + in6_losing(tp->t_inpcb); + else +#endif + in_losing(tp->t_inpcb); + tp->t_rttvar += (tp->t_srtt >> TCP_RTT_SHIFT); + tp->t_srtt = 0; + } + sack_filter_clear(&bbr->r_ctl.bbr_sf, tp->snd_una); + tp->snd_recover = tp->snd_max; + tp->t_flags |= TF_ACKNOW; + tp->t_rtttime = 0; +out: + return (retval); +} + +static int +bbr_process_timers(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts, uint8_t hpts_calling) +{ + int32_t ret = 0; + int32_t timers = (bbr->r_ctl.rc_hpts_flags & PACE_TMR_MASK); + + if (timers == 0) { + return (0); + } + if (tp->t_state == TCPS_LISTEN) { + /* no timers on listen sockets */ + if (bbr->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) + return (0); + return (1); + } + if (TSTMP_LT(cts, bbr->r_ctl.rc_timer_exp)) { + uint32_t left; + + if (bbr->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) { + ret = -1; + bbr_log_to_processing(bbr, cts, ret, 0, hpts_calling); + return (0); + } + if (hpts_calling == 0) { + ret = -2; + bbr_log_to_processing(bbr, cts, ret, 0, hpts_calling); + return (0); + } + /* + * Ok our timer went off early and we are not paced false + * alarm, go back to sleep. + */ + left = bbr->r_ctl.rc_timer_exp - cts; + ret = -3; + bbr_log_to_processing(bbr, cts, ret, left, hpts_calling); + tcp_hpts_insert(tp->t_inpcb, HPTS_USEC_TO_SLOTS(left)); + return (1); + } + bbr->rc_tmr_stopped = 0; + bbr->r_ctl.rc_hpts_flags &= ~PACE_TMR_MASK; + if (timers & PACE_TMR_DELACK) { + ret = bbr_timeout_delack(tp, bbr, cts); + } else if (timers & PACE_TMR_PERSIT) { + ret = bbr_timeout_persist(tp, bbr, cts); + } else if (timers & PACE_TMR_RACK) { + bbr->r_ctl.rc_tlp_rxt_last_time = cts; + ret = bbr_timeout_rack(tp, bbr, cts); + } else if (timers & PACE_TMR_TLP) { + bbr->r_ctl.rc_tlp_rxt_last_time = cts; + ret = bbr_timeout_tlp(tp, bbr, cts); + } else if (timers & PACE_TMR_RXT) { + bbr->r_ctl.rc_tlp_rxt_last_time = cts; + ret = bbr_timeout_rxt(tp, bbr, cts); + } else if (timers & PACE_TMR_KEEP) { + ret = bbr_timeout_keepalive(tp, bbr, cts); + } + bbr_log_to_processing(bbr, cts, ret, timers, hpts_calling); + return (ret); +} + +static void +bbr_timer_cancel(struct tcp_bbr *bbr, int32_t line, uint32_t cts) +{ + if (bbr->r_ctl.rc_hpts_flags & PACE_TMR_MASK) { + uint8_t hpts_removed = 0; + + if (bbr->rc_inp->inp_in_hpts && + (bbr->rc_timer_first == 1)) { + /* + * If we are canceling timer's when we have the + * timer ahead of the output being paced. We also + * must remove ourselves from the hpts. + */ + hpts_removed = 1; + tcp_hpts_remove(bbr->rc_inp, HPTS_REMOVE_OUTPUT); + if (bbr->r_ctl.rc_last_delay_val) { + /* Update the last hptsi delay too */ + uint32_t time_since_send; + + if (TSTMP_GT(cts, bbr->rc_pacer_started)) + time_since_send = cts - bbr->rc_pacer_started; + else + time_since_send = 0; + if (bbr->r_ctl.rc_last_delay_val > time_since_send) { + /* Cut down our slot time */ + bbr->r_ctl.rc_last_delay_val -= time_since_send; + } else { + bbr->r_ctl.rc_last_delay_val = 0; + } + bbr->rc_pacer_started = cts; + } + } + bbr->rc_timer_first = 0; + bbr_log_to_cancel(bbr, line, cts, hpts_removed); + bbr->rc_tmr_stopped = bbr->r_ctl.rc_hpts_flags & PACE_TMR_MASK; + bbr->r_ctl.rc_hpts_flags &= ~(PACE_TMR_MASK); + } +} + +static void +bbr_timer_stop(struct tcpcb *tp, uint32_t timer_type) +{ + struct tcp_bbr *bbr; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + bbr->rc_all_timers_stopped = 1; + return; +} + +/* + * stop all timers always returning 0. + */ +static int +bbr_stopall(struct tcpcb *tp) +{ + return (0); +} + +static void +bbr_timer_activate(struct tcpcb *tp, uint32_t timer_type, uint32_t delta) +{ + return; +} + +/* + * return true if a bbr timer (rack or tlp) is active. + */ +static int +bbr_timer_active(struct tcpcb *tp, uint32_t timer_type) +{ + return (0); +} + +static uint32_t +bbr_get_earliest_send_outstanding(struct tcp_bbr *bbr, struct bbr_sendmap *u_rsm, uint32_t cts) +{ + struct bbr_sendmap *rsm; + + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_tmap); + if ((rsm == NULL) || (u_rsm == rsm)) + return (cts); + return(rsm->r_tim_lastsent[(rsm->r_rtr_cnt-1)]); +} + +static void +bbr_update_rsm(struct tcpcb *tp, struct tcp_bbr *bbr, + struct bbr_sendmap *rsm, uint32_t cts, uint32_t pacing_time) +{ + int32_t idx; + + rsm->r_rtr_cnt++; + rsm->r_dupack = 0; + if (rsm->r_rtr_cnt > BBR_NUM_OF_RETRANS) { + rsm->r_rtr_cnt = BBR_NUM_OF_RETRANS; + rsm->r_flags |= BBR_OVERMAX; + } + if (rsm->r_flags & BBR_RWND_COLLAPSED) { + /* Take off the collapsed flag at rxt */ + rsm->r_flags &= ~BBR_RWND_COLLAPSED; + } + if (rsm->r_flags & BBR_MARKED_LOST) { + /* We have retransmitted, its no longer lost */ + rsm->r_flags &= ~BBR_MARKED_LOST; + bbr->r_ctl.rc_lost_bytes -= rsm->r_end - rsm->r_start; + } + if (rsm->r_flags & BBR_RXT_CLEARED) { + /* + * We hit a RXT timer on it and + * we cleared the "acked" flag. + * We now have it going back into + * flight, we can remove the cleared + * flag and possibly do accounting on + * this piece. + */ + rsm->r_flags &= ~BBR_RXT_CLEARED; + } + if ((rsm->r_rtr_cnt > 1) && ((rsm->r_flags & BBR_TLP) == 0)) { + bbr->r_ctl.rc_holes_rxt += (rsm->r_end - rsm->r_start); + rsm->r_rtr_bytes += (rsm->r_end - rsm->r_start); + } + idx = rsm->r_rtr_cnt - 1; + rsm->r_tim_lastsent[idx] = cts; + rsm->r_pacing_delay = pacing_time; + rsm->r_delivered = bbr->r_ctl.rc_delivered; + rsm->r_ts_valid = bbr->rc_ts_valid; + if (bbr->rc_ts_valid) + rsm->r_del_ack_ts = bbr->r_ctl.last_inbound_ts; + if (bbr->r_ctl.r_app_limited_until) + rsm->r_app_limited = 1; + else + rsm->r_app_limited = 0; + if (bbr->rc_bbr_state == BBR_STATE_PROBE_BW) + rsm->r_bbr_state = bbr_state_val(bbr); + else + rsm->r_bbr_state = 8; + if (rsm->r_flags & BBR_ACKED) { + /* Problably MTU discovery messing with us */ + uint32_t old_flags; + + old_flags = rsm->r_flags; + rsm->r_flags &= ~BBR_ACKED; + bbr_log_type_rsmclear(bbr, cts, rsm, old_flags, __LINE__); + bbr->r_ctl.rc_sacked -= (rsm->r_end - rsm->r_start); + if (bbr->r_ctl.rc_sacked == 0) + bbr->r_ctl.rc_sacklast = NULL; + } + if (rsm->r_in_tmap) { + TAILQ_REMOVE(&bbr->r_ctl.rc_tmap, rsm, r_tnext); + } + TAILQ_INSERT_TAIL(&bbr->r_ctl.rc_tmap, rsm, r_tnext); + rsm->r_in_tmap = 1; + if (rsm->r_flags & BBR_SACK_PASSED) { + /* We have retransmitted due to the SACK pass */ + rsm->r_flags &= ~BBR_SACK_PASSED; + rsm->r_flags |= BBR_WAS_SACKPASS; + } + rsm->r_first_sent_time = bbr_get_earliest_send_outstanding(bbr, rsm, cts); + rsm->r_flight_at_send = ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + bbr->r_ctl.rc_next = TAILQ_NEXT(rsm, r_next); + if (bbr->r_ctl.rc_bbr_hptsi_gain > BBR_UNIT) { + rsm->r_is_gain = 1; + rsm->r_is_drain = 0; + } else if (bbr->r_ctl.rc_bbr_hptsi_gain < BBR_UNIT) { + rsm->r_is_drain = 1; + rsm->r_is_gain = 0; + } else { + rsm->r_is_drain = 0; + rsm->r_is_gain = 0; + } + rsm->r_del_time = bbr->r_ctl.rc_del_time; /* TEMP GOOGLE CODE */ +} + +/* + * Returns 0, or the sequence where we stopped + * updating. We also update the lenp to be the amount + * of data left. + */ + +static uint32_t +bbr_update_entry(struct tcpcb *tp, struct tcp_bbr *bbr, + struct bbr_sendmap *rsm, uint32_t cts, int32_t *lenp, uint32_t pacing_time) +{ + /* + * We (re-)transmitted starting at rsm->r_start for some length + * (possibly less than r_end. + */ + struct bbr_sendmap *nrsm; + uint32_t c_end; + int32_t len; + + len = *lenp; + c_end = rsm->r_start + len; + if (SEQ_GEQ(c_end, rsm->r_end)) { + /* + * We retransmitted the whole piece or more than the whole + * slopping into the next rsm. + */ + bbr_update_rsm(tp, bbr, rsm, cts, pacing_time); + if (c_end == rsm->r_end) { + *lenp = 0; + return (0); + } else { + int32_t act_len; + + /* Hangs over the end return whats left */ + act_len = rsm->r_end - rsm->r_start; + *lenp = (len - act_len); + return (rsm->r_end); + } + /* We don't get out of this block. */ + } + /* + * Here we retransmitted less than the whole thing which means we + * have to split this into what was transmitted and what was not. + */ + nrsm = bbr_alloc_full_limit(bbr); + if (nrsm == NULL) { + *lenp = 0; + return (0); + } + /* + * So here we are going to take the original rsm and make it what we + * retransmitted. nrsm will be the tail portion we did not + * retransmit. For example say the chunk was 1, 11 (10 bytes). And + * we retransmitted 5 bytes i.e. 1, 5. The original piece shrinks to + * 1, 6 and the new piece will be 6, 11. + */ + bbr_clone_rsm(bbr, nrsm, rsm, c_end); + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_map, rsm, nrsm, r_next); + nrsm->r_dupack = 0; + if (rsm->r_in_tmap) { + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_tmap, rsm, nrsm, r_tnext); + nrsm->r_in_tmap = 1; + } + rsm->r_flags &= (~BBR_HAS_FIN); + bbr_update_rsm(tp, bbr, rsm, cts, pacing_time); + *lenp = 0; + return (0); +} + +static uint64_t +bbr_get_hardware_rate(struct tcp_bbr *bbr) +{ + uint64_t bw; + + bw = bbr_get_bw(bbr); + bw *= (uint64_t)bbr_hptsi_gain[BBR_SUB_GAIN]; + bw /= (uint64_t)BBR_UNIT; + return(bw); +} + +static void +bbr_setup_less_of_rate(struct tcp_bbr *bbr, uint32_t cts, + uint64_t act_rate, uint64_t rate_wanted) +{ + /* + * We could not get a full gains worth + * of rate. + */ + if (get_filter_value(&bbr->r_ctl.rc_delrate) >= act_rate) { + /* we can't even get the real rate */ + uint64_t red; + + bbr->skip_gain = 1; + bbr->gain_is_limited = 0; + red = get_filter_value(&bbr->r_ctl.rc_delrate) - act_rate; + if (red) + filter_reduce_by(&bbr->r_ctl.rc_delrate, red, cts); + } else { + /* We can use a lower gain */ + bbr->skip_gain = 0; + bbr->gain_is_limited = 1; + } +} + +static void +bbr_update_hardware_pacing_rate(struct tcp_bbr *bbr, uint32_t cts) +{ + const struct tcp_hwrate_limit_table *nrte; + int error, rate = -1; + + if (bbr->r_ctl.crte == NULL) + return; + if ((bbr->rc_inp->inp_route.ro_rt == NULL) || + (bbr->rc_inp->inp_route.ro_rt->rt_ifp == NULL)) { + /* Lost our routes? */ + /* Clear the way for a re-attempt */ + bbr->bbr_attempt_hdwr_pace = 0; +lost_rate: + bbr->gain_is_limited = 0; + bbr->skip_gain = 0; + bbr->bbr_hdrw_pacing = 0; + counter_u64_add(bbr_flows_whdwr_pacing, -1); + counter_u64_add(bbr_flows_nohdwr_pacing, 1); + tcp_bbr_tso_size_check(bbr, cts); + return; + } + rate = bbr_get_hardware_rate(bbr); + nrte = tcp_chg_pacing_rate(bbr->r_ctl.crte, + bbr->rc_tp, + bbr->rc_inp->inp_route.ro_rt->rt_ifp, + rate, + (RS_PACING_GEQ|RS_PACING_SUB_OK), + &error); + if (nrte == NULL) { + goto lost_rate; + } + if (nrte != bbr->r_ctl.crte) { + bbr->r_ctl.crte = nrte; + if (error == 0) { + BBR_STAT_INC(bbr_hdwr_rl_mod_ok); + if (bbr->r_ctl.crte->rate < rate) { + /* We have a problem */ + bbr_setup_less_of_rate(bbr, cts, + bbr->r_ctl.crte->rate, rate); + } else { + /* We are good */ + bbr->gain_is_limited = 0; + bbr->skip_gain = 0; + } + } else { + /* A failure should release the tag */ + BBR_STAT_INC(bbr_hdwr_rl_mod_fail); + bbr->gain_is_limited = 0; + bbr->skip_gain = 0; + bbr->bbr_hdrw_pacing = 0; + } + bbr_type_log_hdwr_pacing(bbr, + bbr->r_ctl.crte->ptbl->rs_ifp, + rate, + ((bbr->r_ctl.crte == NULL) ? 0 : bbr->r_ctl.crte->rate), + __LINE__, + cts, + error); + } +} + +static void +bbr_adjust_for_hw_pacing(struct tcp_bbr *bbr, uint32_t cts) +{ + /* + * If we have hardware pacing support + * we need to factor that in for our + * TSO size. + */ + const struct tcp_hwrate_limit_table *rlp; + uint32_t cur_delay, seg_sz, maxseg, new_tso, delta, hdwr_delay; + + if ((bbr->bbr_hdrw_pacing == 0) || + (IN_RECOVERY(bbr->rc_tp->t_flags)) || + (bbr->r_ctl.crte == NULL)) + return; + if (bbr->hw_pacing_set == 0) { + /* Not yet by the hdwr pacing count delay */ + return; + } + if (bbr_hdwr_pace_adjust == 0) { + /* No adjustment */ + return; + } + rlp = bbr->r_ctl.crte; + if (bbr->rc_tp->t_maxseg > bbr->rc_last_options) + maxseg = bbr->rc_tp->t_maxseg - bbr->rc_last_options; + else + maxseg = BBR_MIN_SEG - bbr->rc_last_options; + /* + * So lets first get the + * time we will take between + * TSO sized sends currently without + * hardware help. + */ + cur_delay = bbr_get_pacing_delay(bbr, BBR_UNIT, + bbr->r_ctl.rc_pace_max_segs, cts, 1); + hdwr_delay = bbr->r_ctl.rc_pace_max_segs / maxseg; + hdwr_delay *= rlp->time_between; + if (cur_delay > hdwr_delay) + delta = cur_delay - hdwr_delay; + else + delta = 0; + bbr_log_type_tsosize(bbr, cts, delta, cur_delay, hdwr_delay, + (bbr->r_ctl.rc_pace_max_segs / maxseg), + 1); + if (delta && + (delta < (max(rlp->time_between, + bbr->r_ctl.bbr_hptsi_segments_delay_tar)))) { + /* + * Now lets divide by the pacing + * time between each segment the + * hardware sends rounding up and + * derive a bytes from that. We multiply + * that by bbr_hdwr_pace_adjust to get + * more bang for our buck. + * + * The goal is to have the software pacer + * waiting no more than an additional + * pacing delay if we can (without the + * compensation i.e. x bbr_hdwr_pace_adjust). + */ + seg_sz = max(((cur_delay + rlp->time_between)/rlp->time_between), + (bbr->r_ctl.rc_pace_max_segs/maxseg)); + seg_sz *= bbr_hdwr_pace_adjust; + if (bbr_hdwr_pace_floor && + (seg_sz < bbr->r_ctl.crte->ptbl->rs_min_seg)) { + /* Currently hardware paces + * out rs_min_seg segments at a time. + * We need to make sure we always send at least + * a full burst of bbr_hdwr_pace_floor down. + */ + seg_sz = bbr->r_ctl.crte->ptbl->rs_min_seg; + } + seg_sz *= maxseg; + } else if (delta == 0) { + /* + * The highest pacing rate is + * above our b/w gained. This means + * we probably are going quite fast at + * the hardware highest rate. Lets just multiply + * the calculated TSO size by the + * multiplier factor (its probably + * 4 segments in the default config for + * mlx). + */ + seg_sz = bbr->r_ctl.rc_pace_max_segs * bbr_hdwr_pace_adjust; + if (bbr_hdwr_pace_floor && + (seg_sz < bbr->r_ctl.crte->ptbl->rs_min_seg)) { + /* Currently hardware paces + * out rs_min_seg segments at a time. + * We need to make sure we always send at least + * a full burst of bbr_hdwr_pace_floor down. + */ + seg_sz = bbr->r_ctl.crte->ptbl->rs_min_seg; + } + } else { + /* + * The pacing time difference is so + * big that the hardware will + * pace out more rapidly then we + * really want and then we + * will have a long delay. Lets just keep + * the same TSO size so its as if + * we were not using hdwr pacing (we + * just gain a bit of spacing from the + * hardware if seg_sz > 1). + */ + seg_sz = bbr->r_ctl.rc_pace_max_segs; + } + if (seg_sz > bbr->r_ctl.rc_pace_max_segs) + new_tso = seg_sz; + else + new_tso = bbr->r_ctl.rc_pace_max_segs; + if (new_tso >= (PACE_MAX_IP_BYTES-maxseg)) + new_tso = PACE_MAX_IP_BYTES - maxseg; + + if (new_tso != bbr->r_ctl.rc_pace_max_segs) { + bbr_log_type_tsosize(bbr, cts, new_tso, 0, bbr->r_ctl.rc_pace_max_segs, maxseg, 0); + bbr->r_ctl.rc_pace_max_segs = new_tso; + } +} + +static void +tcp_bbr_tso_size_check(struct tcp_bbr *bbr, uint32_t cts) +{ + uint64_t bw; + uint32_t old_tso = 0, new_tso; + uint32_t maxseg, bytes; + uint32_t tls_seg=0; + /* + * Google/linux uses the following algorithm to determine + * the TSO size based on the b/w of the link (from Neal Cardwell email 9/27/18): + * + * bytes = bw_in_bytes_per_second / 1000 + * bytes = min(bytes, 64k) + * tso_segs = bytes / MSS + * if (bw < 1.2Mbs) + * min_tso_segs = 1 + * else + * min_tso_segs = 2 + * tso_segs = max(tso_segs, min_tso_segs) + * + * * Note apply a device specific limit (we apply this in the + * tcp_m_copym). + * Note that before the initial measurement is made google bursts out + * a full iwnd just like new-reno/cubic. + * + * We do not use this algorithm. Instead we + * use a two phased approach: + * + * if ( bw <= per-tcb-cross-over) + * goal_tso = calculate how much with this bw we + * can send in goal-time seconds. + * if (goal_tso > mss) + * seg = goal_tso / mss + * tso = seg * mss + * else + * tso = mss + * if (tso > per-tcb-max) + * tso = per-tcb-max + * else if ( bw > 512Mbps) + * tso = max-tso (64k/mss) + * else + * goal_tso = bw / per-tcb-divsor + * seg = (goal_tso + mss-1)/mss + * tso = seg * mss + * + * if (tso < per-tcb-floor) + * tso = per-tcb-floor + * if (tso > per-tcb-utter_max) + * tso = per-tcb-utter_max + * + * Note the default per-tcb-divisor is 1000 (same as google). + * the goal cross over is 30Mbps however. To recreate googles + * algorithm you need to set: + * + * cross-over = 23,168,000 bps + * goal-time = 18000 + * per-tcb-max = 2 + * per-tcb-divisor = 1000 + * per-tcb-floor = 1 + * + * This will get you "google bbr" behavior with respect to tso size. + * + * Note we do set anything TSO size until we are past the initial + * window. Before that we gnerally use either a single MSS + * or we use the full IW size (so we burst a IW at a time) + * Also note that Hardware-TLS is special and does alternate + * things to minimize PCI Bus Bandwidth use. + */ + + if (bbr->rc_tp->t_maxseg > bbr->rc_last_options) { + maxseg = bbr->rc_tp->t_maxseg - bbr->rc_last_options; + } else { + maxseg = BBR_MIN_SEG - bbr->rc_last_options; + } +#ifdef KERN_TLS + if (bbr->rc_inp->inp_socket->so_snd.sb_flags & SB_TLS_IFNET) { + tls_seg = ctf_get_opt_tls_size(bbr->rc_inp->inp_socket, bbr->rc_tp->snd_wnd); + bbr->r_ctl.rc_pace_min_segs = (tls_seg + bbr->rc_last_options); + } +#endif + old_tso = bbr->r_ctl.rc_pace_max_segs; + if (bbr->rc_past_init_win == 0) { + /* + * Not enough data has been acknowledged to make a + * judgement unless we are hardware TLS. Set up + * the inital TSO based on if we are sending a + * full IW at once or not. + */ + if (bbr->rc_use_google) + bbr->r_ctl.rc_pace_max_segs = ((bbr->rc_tp->t_maxseg - bbr->rc_last_options) * 2); + else if (bbr->bbr_init_win_cheat) + bbr->r_ctl.rc_pace_max_segs = bbr_initial_cwnd(bbr, bbr->rc_tp); + else + bbr->r_ctl.rc_pace_max_segs = bbr->rc_tp->t_maxseg - bbr->rc_last_options; + if (bbr->r_ctl.rc_pace_min_segs != bbr->rc_tp->t_maxseg) + bbr->r_ctl.rc_pace_min_segs = bbr->rc_tp->t_maxseg; +#ifdef KERN_TLS + if ((bbr->rc_inp->inp_socket->so_snd.sb_flags & SB_TLS_IFNET) && tls_seg) { + /* + * For hardware TLS we set our min to the tls_seg size. + */ + bbr->r_ctl.rc_pace_max_segs = tls_seg; + bbr->r_ctl.rc_pace_min_segs = tls_seg + bbr->rc_last_options; + } +#endif + if (bbr->r_ctl.rc_pace_max_segs == 0) { + bbr->r_ctl.rc_pace_max_segs = maxseg; + } + bbr_log_type_tsosize(bbr, cts, bbr->r_ctl.rc_pace_max_segs, tls_seg, old_tso, maxseg, 0); +#ifdef KERN_TLS + if ((bbr->rc_inp->inp_socket->so_snd.sb_flags & SB_TLS_IFNET) == 0) +#endif + bbr_adjust_for_hw_pacing(bbr, cts); + return; + } + /** + * Now lets set the TSO goal based on our delivery rate in + * bytes per second. Note we only do this if + * we have acked at least the initial cwnd worth of data. + */ + bw = bbr_get_bw(bbr); + if (IN_RECOVERY(bbr->rc_tp->t_flags) && + (bbr->rc_use_google == 0)) { + /* We clamp to one MSS in recovery */ + new_tso = maxseg; + } else if (bbr->rc_use_google) { + int min_tso_segs; + + /* Google considers the gain too */ + if (bbr->r_ctl.rc_bbr_hptsi_gain != BBR_UNIT) { + bw *= bbr->r_ctl.rc_bbr_hptsi_gain; + bw /= BBR_UNIT; + } + bytes = bw / 1024; + if (bytes > (64 * 1024)) + bytes = 64 * 1024; + new_tso = bytes / maxseg; + if (bw < ONE_POINT_TWO_MEG) + min_tso_segs = 1; + else + min_tso_segs = 2; + if (new_tso < min_tso_segs) + new_tso = min_tso_segs; + new_tso *= maxseg; + } else if (bbr->rc_no_pacing) { + new_tso = (PACE_MAX_IP_BYTES / maxseg) * maxseg; + } else if (bw <= bbr->r_ctl.bbr_cross_over) { + /* + * Calculate the worse case b/w TSO if we are inserting no + * more than a delay_target number of TSO's. + */ + uint32_t tso_len, min_tso; + + tso_len = bbr_get_pacing_length(bbr, BBR_UNIT, bbr->r_ctl.bbr_hptsi_segments_delay_tar, bw); + if (tso_len > maxseg) { + new_tso = tso_len / maxseg; + if (new_tso > bbr->r_ctl.bbr_hptsi_segments_max) + new_tso = bbr->r_ctl.bbr_hptsi_segments_max; + new_tso *= maxseg; + } else { + /* + * less than a full sized frame yikes.. long rtt or + * low bw? + */ + min_tso = bbr_minseg(bbr); + if ((tso_len > min_tso) && (bbr_all_get_min == 0)) + new_tso = rounddown(tso_len, min_tso); + else + new_tso = min_tso; + } + } else if (bw > FIVETWELVE_MBPS) { + /* + * This guy is so fast b/w wise that we can TSO as large as + * possible of segments that the NIC will allow. + */ + new_tso = rounddown(PACE_MAX_IP_BYTES, maxseg); + } else { + /* + * This formula is based on attempting to send a segment or + * more every bbr_hptsi_per_second. The default is 1000 + * which means you are targeting what you can send every 1ms + * based on the peers bw. + * + * If the number drops to say 500, then you are looking more + * at 2ms and you will raise how much we send in a single + * TSO thus saving CPU (less bbr_output_wtime() calls). The + * trade off of course is you will send more at once and + * thus tend to clump up the sends into larger "bursts" + * building a queue. + */ + bw /= bbr->r_ctl.bbr_hptsi_per_second; + new_tso = roundup(bw, (uint64_t)maxseg); + /* + * Gate the floor to match what our lower than 48Mbps + * algorithm does. The ceiling (bbr_hptsi_segments_max) thus + * becomes the floor for this calculation. + */ + if (new_tso < (bbr->r_ctl.bbr_hptsi_segments_max * maxseg)) + new_tso = (bbr->r_ctl.bbr_hptsi_segments_max * maxseg); + } + if (bbr->r_ctl.bbr_hptsi_segments_floor && (new_tso < (maxseg * bbr->r_ctl.bbr_hptsi_segments_floor))) + new_tso = maxseg * bbr->r_ctl.bbr_hptsi_segments_floor; + if (new_tso > PACE_MAX_IP_BYTES) + new_tso = rounddown(PACE_MAX_IP_BYTES, maxseg); + /* Enforce an utter maximum if we are not HW-TLS */ +#ifdef KERN_TLS + if ((bbr->rc_inp->inp_socket->so_snd.sb_flags & SB_TLS_IFNET) == 0) +#endif + if (bbr->r_ctl.bbr_utter_max && (new_tso > (bbr->r_ctl.bbr_utter_max * maxseg))) { + new_tso = bbr->r_ctl.bbr_utter_max * maxseg; + } +#ifdef KERN_TLS + if (tls_seg) { + /* + * Lets move the output size + * up to 1 or more TLS record sizes. + */ + uint32_t temp; + + temp = roundup(new_tso, tls_seg); + new_tso = temp; + /* Back down if needed to under a full frame */ + while (new_tso > PACE_MAX_IP_BYTES) + new_tso -= tls_seg; + } +#endif + if (old_tso != new_tso) { + /* Only log changes */ + bbr_log_type_tsosize(bbr, cts, new_tso, tls_seg, old_tso, maxseg, 0); + bbr->r_ctl.rc_pace_max_segs = new_tso; + } +#ifdef KERN_TLS + if ((bbr->rc_inp->inp_socket->so_snd.sb_flags & SB_TLS_IFNET) && + tls_seg) { + bbr->r_ctl.rc_pace_min_segs = tls_seg + bbr->rc_last_options; + } else +#endif + /* We have hardware pacing and not hardware TLS! */ + bbr_adjust_for_hw_pacing(bbr, cts); +} + +static void +bbr_log_output(struct tcp_bbr *bbr, struct tcpcb *tp, struct tcpopt *to, int32_t len, + uint32_t seq_out, uint8_t th_flags, int32_t err, uint32_t cts, + struct mbuf *mb, int32_t * abandon, struct bbr_sendmap *hintrsm, uint32_t delay_calc, + struct sockbuf *sb) +{ + + struct bbr_sendmap *rsm, *nrsm; + register uint32_t snd_max, snd_una; + uint32_t pacing_time; + /* + * Add to the RACK log of packets in flight or retransmitted. If + * there is a TS option we will use the TS echoed, if not we will + * grab a TS. + * + * Retransmissions will increment the count and move the ts to its + * proper place. Note that if options do not include TS's then we + * won't be able to effectively use the ACK for an RTT on a retran. + * + * Notes about r_start and r_end. Lets consider a send starting at + * sequence 1 for 10 bytes. In such an example the r_start would be + * 1 (starting sequence) but the r_end would be r_start+len i.e. 11. + * This means that r_end is actually the first sequence for the next + * slot (11). + * + */ + INP_WLOCK_ASSERT(tp->t_inpcb); + if (err) { + /* + * We don't log errors -- we could but snd_max does not + * advance in this case either. + */ + return; + } + if (th_flags & TH_RST) { + /* + * We don't log resets and we return immediately from + * sending + */ + *abandon = 1; + return; + } + snd_una = tp->snd_una; + if (th_flags & (TH_SYN | TH_FIN) && (hintrsm == NULL)) { + /* + * The call to bbr_log_output is made before bumping + * snd_max. This means we can record one extra byte on a SYN + * or FIN if seq_out is adding more on and a FIN is present + * (and we are not resending). + */ + if (th_flags & TH_SYN) + len++; + if (th_flags & TH_FIN) + len++; + } + if (SEQ_LEQ((seq_out + len), snd_una)) { + /* Are sending an old segment to induce an ack (keep-alive)? */ + return; + } + if (SEQ_LT(seq_out, snd_una)) { + /* huh? should we panic? */ + uint32_t end; + + end = seq_out + len; + seq_out = snd_una; + len = end - seq_out; + } + snd_max = tp->snd_max; + if (len == 0) { + /* We don't log zero window probes */ + return; + } + pacing_time = bbr_get_pacing_delay(bbr, bbr->r_ctl.rc_bbr_hptsi_gain, len, cts, 1); + /* First question is it a retransmission? */ + if (seq_out == snd_max) { +again: + rsm = bbr_alloc(bbr); + if (rsm == NULL) { + return; + } + rsm->r_flags = 0; + if (th_flags & TH_SYN) + rsm->r_flags |= BBR_HAS_SYN; + if (th_flags & TH_FIN) + rsm->r_flags |= BBR_HAS_FIN; + rsm->r_tim_lastsent[0] = cts; + rsm->r_rtr_cnt = 1; + rsm->r_rtr_bytes = 0; + rsm->r_start = seq_out; + rsm->r_end = rsm->r_start + len; + rsm->r_dupack = 0; + rsm->r_delivered = bbr->r_ctl.rc_delivered; + rsm->r_pacing_delay = pacing_time; + rsm->r_ts_valid = bbr->rc_ts_valid; + if (bbr->rc_ts_valid) + rsm->r_del_ack_ts = bbr->r_ctl.last_inbound_ts; + rsm->r_del_time = bbr->r_ctl.rc_del_time; + if (bbr->r_ctl.r_app_limited_until) + rsm->r_app_limited = 1; + else + rsm->r_app_limited = 0; + rsm->r_first_sent_time = bbr_get_earliest_send_outstanding(bbr, rsm, cts); + rsm->r_flight_at_send = ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + /* + * Here we must also add in this rsm since snd_max + * is updated after we return from a new send. + */ + rsm->r_flight_at_send += len; + TAILQ_INSERT_TAIL(&bbr->r_ctl.rc_map, rsm, r_next); + TAILQ_INSERT_TAIL(&bbr->r_ctl.rc_tmap, rsm, r_tnext); + rsm->r_in_tmap = 1; + if (bbr->rc_bbr_state == BBR_STATE_PROBE_BW) + rsm->r_bbr_state = bbr_state_val(bbr); + else + rsm->r_bbr_state = 8; + if (bbr->r_ctl.rc_bbr_hptsi_gain > BBR_UNIT) { + rsm->r_is_gain = 1; + rsm->r_is_drain = 0; + } else if (bbr->r_ctl.rc_bbr_hptsi_gain < BBR_UNIT) { + rsm->r_is_drain = 1; + rsm->r_is_gain = 0; + } else { + rsm->r_is_drain = 0; + rsm->r_is_gain = 0; + } + return; + } + /* + * If we reach here its a retransmission and we need to find it. + */ +more: + if (hintrsm && (hintrsm->r_start == seq_out)) { + rsm = hintrsm; + hintrsm = NULL; + } else if (bbr->r_ctl.rc_next) { + /* We have a hint from a previous run */ + rsm = bbr->r_ctl.rc_next; + } else { + /* No hints sorry */ + rsm = NULL; + } + if ((rsm) && (rsm->r_start == seq_out)) { + /* + * We used rc_next or hintrsm to retransmit, hopefully the + * likely case. + */ + seq_out = bbr_update_entry(tp, bbr, rsm, cts, &len, pacing_time); + if (len == 0) { + return; + } else { + goto more; + } + } + /* Ok it was not the last pointer go through it the hard way. */ + TAILQ_FOREACH(rsm, &bbr->r_ctl.rc_map, r_next) { + if (rsm->r_start == seq_out) { + seq_out = bbr_update_entry(tp, bbr, rsm, cts, &len, pacing_time); + bbr->r_ctl.rc_next = TAILQ_NEXT(rsm, r_next); + if (len == 0) { + return; + } else { + continue; + } + } + if (SEQ_GEQ(seq_out, rsm->r_start) && SEQ_LT(seq_out, rsm->r_end)) { + /* Transmitted within this piece */ + /* + * Ok we must split off the front and then let the + * update do the rest + */ + nrsm = bbr_alloc_full_limit(bbr); + if (nrsm == NULL) { + bbr_update_rsm(tp, bbr, rsm, cts, pacing_time); + return; + } + /* + * copy rsm to nrsm and then trim the front of rsm + * to not include this part. + */ + bbr_clone_rsm(bbr, nrsm, rsm, seq_out); + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_map, rsm, nrsm, r_next); + if (rsm->r_in_tmap) { + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_tmap, rsm, nrsm, r_tnext); + nrsm->r_in_tmap = 1; + } + rsm->r_flags &= (~BBR_HAS_FIN); + seq_out = bbr_update_entry(tp, bbr, nrsm, cts, &len, pacing_time); + if (len == 0) { + return; + } + } + } + /* + * Hmm not found in map did they retransmit both old and on into the + * new? + */ + if (seq_out == tp->snd_max) { + goto again; + } else if (SEQ_LT(seq_out, tp->snd_max)) { +#ifdef BBR_INVARIANTS + printf("seq_out:%u len:%d snd_una:%u snd_max:%u -- but rsm not found?\n", + seq_out, len, tp->snd_una, tp->snd_max); + printf("Starting Dump of all rack entries\n"); + TAILQ_FOREACH(rsm, &bbr->r_ctl.rc_map, r_next) { + printf("rsm:%p start:%u end:%u\n", + rsm, rsm->r_start, rsm->r_end); + } + printf("Dump complete\n"); + panic("seq_out not found rack:%p tp:%p", + bbr, tp); +#endif + } else { +#ifdef BBR_INVARIANTS + /* + * Hmm beyond sndmax? (only if we are using the new rtt-pack + * flag) + */ + panic("seq_out:%u(%d) is beyond snd_max:%u tp:%p", + seq_out, len, tp->snd_max, tp); +#endif + } +} + +static void +bbr_collapse_rtt(struct tcpcb *tp, struct tcp_bbr *bbr, int32_t rtt) +{ + /* + * Collapse timeout back the cum-ack moved. + */ + tp->t_rxtshift = 0; + tp->t_softerror = 0; +} + + +static void +tcp_bbr_xmit_timer(struct tcp_bbr *bbr, uint32_t rtt_usecs, uint32_t rsm_send_time, uint32_t r_start, uint32_t tsin) +{ + bbr->rtt_valid = 1; + bbr->r_ctl.cur_rtt = rtt_usecs; + bbr->r_ctl.ts_in = tsin; + if (rsm_send_time) + bbr->r_ctl.cur_rtt_send_time = rsm_send_time; +} + +static void +bbr_make_timestamp_determination(struct tcp_bbr *bbr) +{ + /** + * We have in our bbr control: + * 1) The timestamp we started observing cum-acks (bbr->r_ctl.bbr_ts_check_tstmp). + * 2) Our timestamp indicating when we sent that packet (bbr->r_ctl.rsm->bbr_ts_check_our_cts). + * 3) The current timestamp that just came in (bbr->r_ctl.last_inbound_ts) + * 4) The time that the packet that generated that ack was sent (bbr->r_ctl.cur_rtt_send_time) + * + * Now we can calculate the time between the sends by doing: + * + * delta = bbr->r_ctl.cur_rtt_send_time - bbr->r_ctl.bbr_ts_check_our_cts + * + * And the peer's time between receiving them by doing: + * + * peer_delta = bbr->r_ctl.last_inbound_ts - bbr->r_ctl.bbr_ts_check_tstmp + * + * We want to figure out if the timestamp values are in msec, 10msec or usec. + * We also may find that we can't use the timestamps if say we see + * that the peer_delta indicates that though we may have taken 10ms to + * pace out the data, it only saw 1ms between the two packets. This would + * indicate that somewhere on the path is a batching entity that is giving + * out time-slices of the actual b/w. This would mean we could not use + * reliably the peers timestamps. + * + * We expect delta > peer_delta initially. Until we figure out the + * timestamp difference which we will store in bbr->r_ctl.bbr_peer_tsratio. + * If we place 1000 there then its a ms vs our usec. If we place 10000 there + * then its 10ms vs our usec. If the peer is running a usec clock we would + * put a 1 there. If the value is faster then ours, we will disable the + * use of timestamps (though we could revist this later if we find it to be not + * just an isolated one or two flows)). + * + * To detect the batching middle boxes we will come up with our compensation and + * if with it in place, we find the peer is drastically off (by some margin) in + * the smaller direction, then we will assume the worst case and disable use of timestamps. + * + */ + uint64_t delta, peer_delta, delta_up; + + delta = bbr->r_ctl.cur_rtt_send_time - bbr->r_ctl.bbr_ts_check_our_cts; + if (delta < bbr_min_usec_delta) { + /* + * Have not seen a min amount of time + * between our send times so we can + * make a determination of the timestamp + * yet. + */ + return; + } + peer_delta = bbr->r_ctl.last_inbound_ts - bbr->r_ctl.bbr_ts_check_tstmp; + if (peer_delta < bbr_min_peer_delta) { + /* + * We may have enough in the form of + * our delta but the peers number + * has not changed that much. It could + * be its clock ratio is such that + * we need more data (10ms tick) or + * there may be other compression scenarios + * going on. In any event we need the + * spread to be larger. + */ + return; + } + /* Ok lets first see which way our delta is going */ + if (peer_delta > delta) { + /* Very unlikely, the peer without + * compensation shows that it saw + * the two sends arrive further apart + * then we saw then in micro-seconds. + */ + if (peer_delta < (delta + ((delta * (uint64_t)1000)/ (uint64_t)bbr_delta_percent))) { + /* well it looks like the peer is a micro-second clock. */ + bbr->rc_ts_clock_set = 1; + bbr->r_ctl.bbr_peer_tsratio = 1; + } else { + bbr->rc_ts_cant_be_used = 1; + bbr->rc_ts_clock_set = 1; + } + return; + } + /* Ok we know that the peer_delta is smaller than our send distance */ + bbr->rc_ts_clock_set = 1; + /* First question is it within the percentage that they are using usec time? */ + delta_up = (peer_delta * 1000) / (uint64_t)bbr_delta_percent; + if ((peer_delta + delta_up) >= delta) { + /* Its a usec clock */ + bbr->r_ctl.bbr_peer_tsratio = 1; + bbr_log_tstmp_validation(bbr, peer_delta, delta); + return; + } + /* Ok if not usec, what about 10usec (though unlikely)? */ + delta_up = (peer_delta * 1000 * 10) / (uint64_t)bbr_delta_percent; + if (((peer_delta * 10) + delta_up) >= delta) { + bbr->r_ctl.bbr_peer_tsratio = 10; + bbr_log_tstmp_validation(bbr, peer_delta, delta); + return; + } + /* And what about 100usec (though again unlikely)? */ + delta_up = (peer_delta * 1000 * 100) / (uint64_t)bbr_delta_percent; + if (((peer_delta * 100) + delta_up) >= delta) { + bbr->r_ctl.bbr_peer_tsratio = 100; + bbr_log_tstmp_validation(bbr, peer_delta, delta); + return; + } + /* And how about 1 msec (the most likely one)? */ + delta_up = (peer_delta * 1000 * 1000) / (uint64_t)bbr_delta_percent; + if (((peer_delta * 1000) + delta_up) >= delta) { + bbr->r_ctl.bbr_peer_tsratio = 1000; + bbr_log_tstmp_validation(bbr, peer_delta, delta); + return; + } + /* Ok if not msec could it be 10 msec? */ + delta_up = (peer_delta * 1000 * 10000) / (uint64_t)bbr_delta_percent; + if (((peer_delta * 10000) + delta_up) >= delta) { + bbr->r_ctl.bbr_peer_tsratio = 10000; + return; + } + /* If we fall down here the clock tick so slowly we can't use it */ + bbr->rc_ts_cant_be_used = 1; + bbr->r_ctl.bbr_peer_tsratio = 0; + bbr_log_tstmp_validation(bbr, peer_delta, delta); +} + +/* + * Collect new round-trip time estimate + * and update averages and current timeout. + */ +static void +tcp_bbr_xmit_timer_commit(struct tcp_bbr *bbr, struct tcpcb *tp, uint32_t cts) +{ + int32_t delta; + uint32_t rtt, tsin; + int32_t rtt_ticks; + + + if (bbr->rtt_valid == 0) + /* No valid sample */ + return; + + rtt = bbr->r_ctl.cur_rtt; + tsin = bbr->r_ctl.ts_in; + if (bbr->rc_prtt_set_ts) { + /* + * We are to force feed the rttProp filter due + * to an entry into PROBE_RTT. This assures + * that the times are sync'd between when we + * go into PROBE_RTT and the filter expiration. + * + * Google does not use a true filter, so they do + * this implicitly since they only keep one value + * and when they enter probe-rtt they update the + * value to the newest rtt. + */ + uint32_t rtt_prop; + + bbr->rc_prtt_set_ts = 0; + rtt_prop = get_filter_value_small(&bbr->r_ctl.rc_rttprop); + if (rtt > rtt_prop) + filter_increase_by_small(&bbr->r_ctl.rc_rttprop, (rtt - rtt_prop), cts); + else + apply_filter_min_small(&bbr->r_ctl.rc_rttprop, rtt, cts); + } + if (bbr->rc_ack_was_delayed) + rtt += bbr->r_ctl.rc_ack_hdwr_delay; + + if (rtt < bbr->r_ctl.rc_lowest_rtt) + bbr->r_ctl.rc_lowest_rtt = rtt; + bbr_log_rtt_sample(bbr, rtt, tsin); + if (bbr->r_init_rtt) { + /* + * The initial rtt is not-trusted, nuke it and lets get + * our first valid measurement in. + */ + bbr->r_init_rtt = 0; + tp->t_srtt = 0; + } + if ((bbr->rc_ts_clock_set == 0) && bbr->rc_ts_valid) { + /* + * So we have not yet figured out + * what the peers TSTMP value is + * in (most likely ms). We need a + * series of cum-ack's to determine + * this reliably. + */ + if (bbr->rc_ack_is_cumack) { + if (bbr->rc_ts_data_set) { + /* Lets attempt to determine the timestamp granularity. */ + bbr_make_timestamp_determination(bbr); + } else { + bbr->rc_ts_data_set = 1; + bbr->r_ctl.bbr_ts_check_tstmp = bbr->r_ctl.last_inbound_ts; + bbr->r_ctl.bbr_ts_check_our_cts = bbr->r_ctl.cur_rtt_send_time; + } + } else { + /* + * We have to have consecutive acks + * reset any "filled" state to none. + */ + bbr->rc_ts_data_set = 0; + } + } + /* Round it up */ + rtt_ticks = USEC_2_TICKS((rtt + (USECS_IN_MSEC - 1))); + if (rtt_ticks == 0) + rtt_ticks = 1; + if (tp->t_srtt != 0) { + /* + * srtt is stored as fixed point with 5 bits after the + * binary point (i.e., scaled by 8). The following magic is + * equivalent to the smoothing algorithm in rfc793 with an + * alpha of .875 (srtt = rtt/8 + srtt*7/8 in fixed point). + * Adjust rtt to origin 0. + */ + + delta = ((rtt_ticks - 1) << TCP_DELTA_SHIFT) + - (tp->t_srtt >> (TCP_RTT_SHIFT - TCP_DELTA_SHIFT)); + + tp->t_srtt += delta; + if (tp->t_srtt <= 0) + tp->t_srtt = 1; + + /* + * We accumulate a smoothed rtt variance (actually, a + * smoothed mean difference), then set the retransmit timer + * to smoothed rtt + 4 times the smoothed variance. rttvar + * is stored as fixed point with 4 bits after the binary + * point (scaled by 16). The following is equivalent to + * rfc793 smoothing with an alpha of .75 (rttvar = + * rttvar*3/4 + |delta| / 4). This replaces rfc793's + * wired-in beta. + */ + if (delta < 0) + delta = -delta; + delta -= tp->t_rttvar >> (TCP_RTTVAR_SHIFT - TCP_DELTA_SHIFT); + tp->t_rttvar += delta; + if (tp->t_rttvar <= 0) + tp->t_rttvar = 1; + if (tp->t_rttbest > tp->t_srtt + tp->t_rttvar) + tp->t_rttbest = tp->t_srtt + tp->t_rttvar; + } else { + /* + * No rtt measurement yet - use the unsmoothed rtt. Set the + * variance to half the rtt (so our first retransmit happens + * at 3*rtt). + */ + tp->t_srtt = rtt_ticks << TCP_RTT_SHIFT; + tp->t_rttvar = rtt_ticks << (TCP_RTTVAR_SHIFT - 1); + tp->t_rttbest = tp->t_srtt + tp->t_rttvar; + } + TCPSTAT_INC(tcps_rttupdated); + tp->t_rttupdated++; +#ifdef NETFLIX_STATS + stats_voi_update_abs_u32(tp->t_stats, VOI_TCP_RTT, imax(0, rtt_ticks)); +#endif + /* + * the retransmit should happen at rtt + 4 * rttvar. Because of the + * way we do the smoothing, srtt and rttvar will each average +1/2 + * tick of bias. When we compute the retransmit timer, we want 1/2 + * tick of rounding and 1 extra tick because of +-1/2 tick + * uncertainty in the firing of the timer. The bias will give us + * exactly the 1.5 tick we need. But, because the bias is + * statistical, we have to test that we don't drop below the minimum + * feasible timer (which is 2 ticks). + */ + TCPT_RANGESET(tp->t_rxtcur, TCP_REXMTVAL(tp), + max(MSEC_2_TICKS(bbr->r_ctl.rc_min_rto_ms), rtt_ticks + 2), + MSEC_2_TICKS(((uint32_t)bbr->rc_max_rto_sec) * 1000)); + + /* + * We received an ack for a packet that wasn't retransmitted; it is + * probably safe to discard any error indications we've received + * recently. This isn't quite right, but close enough for now (a + * route might have failed after we sent a segment, and the return + * path might not be symmetrical). + */ + tp->t_softerror = 0; + rtt = (TICKS_2_USEC(bbr->rc_tp->t_srtt) >> TCP_RTT_SHIFT); + if (bbr->r_ctl.bbr_smallest_srtt_this_state > rtt) + bbr->r_ctl.bbr_smallest_srtt_this_state = rtt; +} + +static void +bbr_earlier_retran(struct tcpcb *tp, struct tcp_bbr *bbr, struct bbr_sendmap *rsm, + uint32_t t, uint32_t cts, int ack_type) +{ + /* + * For this RSM, we acknowledged the data from a previous + * transmission, not the last one we made. This means we did a false + * retransmit. + */ + if (rsm->r_flags & BBR_HAS_FIN) { + /* + * The sending of the FIN often is multiple sent when we + * have everything outstanding ack'd. We ignore this case + * since its over now. + */ + return; + } + if (rsm->r_flags & BBR_TLP) { + /* + * We expect TLP's to have this occur often + */ + bbr->rc_tlp_rtx_out = 0; + return; + } + if (ack_type != BBR_CUM_ACKED) { + /* + * If it was not a cum-ack we + * don't really know for sure since + * the timestamp could be from some + * other transmission. + */ + return; + } + + if (rsm->r_flags & BBR_WAS_SACKPASS) { + /* + * We retransmitted based on a sack and the earlier + * retransmission ack'd it - re-ordering is occuring. + */ + BBR_STAT_INC(bbr_reorder_seen); + bbr->r_ctl.rc_reorder_ts = cts; + } + /* Back down the loss count */ + if (rsm->r_flags & BBR_MARKED_LOST) { + bbr->r_ctl.rc_lost -= rsm->r_end - rsm->r_start; + bbr->r_ctl.rc_lost_bytes -= rsm->r_end - rsm->r_start; + rsm->r_flags &= ~BBR_MARKED_LOST; + if (SEQ_GT(bbr->r_ctl.rc_lt_lost, bbr->r_ctl.rc_lost)) + /* LT sampling also needs adjustment */ + bbr->r_ctl.rc_lt_lost = bbr->r_ctl.rc_lost; + } + /***** RRS HERE ************************/ + /* Do we need to do this??? */ + /* bbr_reset_lt_bw_sampling(bbr, cts); */ + /***** RRS HERE ************************/ + BBR_STAT_INC(bbr_badfr); + BBR_STAT_ADD(bbr_badfr_bytes, (rsm->r_end - rsm->r_start)); +} + + +static void +bbr_set_reduced_rtt(struct tcp_bbr *bbr, uint32_t cts, uint32_t line) +{ + bbr->r_ctl.rc_rtt_shrinks = cts; + if (bbr_can_force_probertt && + (TSTMP_GT(cts, bbr->r_ctl.last_in_probertt)) && + ((cts - bbr->r_ctl.last_in_probertt) > bbr->r_ctl.rc_probertt_int)) { + /* + * We should enter probe-rtt its been too long + * since we have been there. + */ + bbr_enter_probe_rtt(bbr, cts, __LINE__); + } else + bbr_check_probe_rtt_limits(bbr, cts); +} + +static void +tcp_bbr_commit_bw(struct tcp_bbr *bbr, uint32_t cts) +{ + uint64_t orig_bw; + + if (bbr->r_ctl.rc_bbr_cur_del_rate == 0) { + /* We never apply a zero measurment */ + bbr_log_type_bbrupd(bbr, 20, cts, 0, 0, + 0, 0, 0, 0, 0, 0); + return; + } + if (bbr->r_ctl.r_measurement_count < 0xffffffff) + bbr->r_ctl.r_measurement_count++; + orig_bw = get_filter_value(&bbr->r_ctl.rc_delrate); + apply_filter_max(&bbr->r_ctl.rc_delrate, bbr->r_ctl.rc_bbr_cur_del_rate, bbr->r_ctl.rc_pkt_epoch); + bbr_log_type_bbrupd(bbr, 21, cts, (uint32_t)orig_bw, + (uint32_t)get_filter_value(&bbr->r_ctl.rc_delrate), + 0, 0, 0, 0, 0, 0); + if (orig_bw && + (orig_bw != get_filter_value(&bbr->r_ctl.rc_delrate))) { + if (bbr->bbr_hdrw_pacing) { + /* + * Apply a new rate to the hardware + * possibly. + */ + bbr_update_hardware_pacing_rate(bbr, cts); + } + bbr_set_state_target(bbr, __LINE__); + tcp_bbr_tso_size_check(bbr, cts); + if (bbr->r_recovery_bw) { + bbr_setup_red_bw(bbr, cts); + bbr_log_type_bw_reduce(bbr, BBR_RED_BW_USELRBW); + } + } else if ((orig_bw == 0) && get_filter_value(&bbr->r_ctl.rc_delrate)) + tcp_bbr_tso_size_check(bbr, cts); +} + +static void +bbr_nf_measurement(struct tcp_bbr *bbr, struct bbr_sendmap *rsm, uint32_t rtt, uint32_t cts) +{ + if (bbr->rc_in_persist == 0) { + /* We log only when not in persist */ + /* Translate to a Bytes Per Second */ + uint64_t tim, bw, ts_diff, ts_bw; + uint32_t upper, lower, delivered; + + if (TSTMP_GT(bbr->r_ctl.rc_del_time, rsm->r_del_time)) + tim = (uint64_t)(bbr->r_ctl.rc_del_time - rsm->r_del_time); + else + tim = 1; + /* + * Now that we have processed the tim (skipping the sample + * or possibly updating the time, go ahead and + * calculate the cdr. + */ + delivered = (bbr->r_ctl.rc_delivered - rsm->r_delivered); + bw = (uint64_t)delivered; + bw *= (uint64_t)USECS_IN_SECOND; + bw /= tim; + if (bw == 0) { + /* We must have a calculatable amount */ + return; + } + upper = (bw >> 32) & 0x00000000ffffffff; + lower = bw & 0x00000000ffffffff; + /* + * If we are using this b/w shove it in now so we + * can see in the trace viewer if it gets over-ridden. + */ + if (rsm->r_ts_valid && + bbr->rc_ts_valid && + bbr->rc_ts_clock_set && + (bbr->rc_ts_cant_be_used == 0) && + bbr->rc_use_ts_limit) { + ts_diff = max((bbr->r_ctl.last_inbound_ts - rsm->r_del_ack_ts), 1); + ts_diff *= bbr->r_ctl.bbr_peer_tsratio; + if ((delivered == 0) || + (rtt < 1000)) { + /* Can't use the ts */ + bbr_log_type_bbrupd(bbr, 61, cts, + ts_diff, + bbr->r_ctl.last_inbound_ts, + rsm->r_del_ack_ts, 0, + 0, 0, 0, delivered); + } else { + ts_bw = (uint64_t)delivered; + ts_bw *= (uint64_t)USECS_IN_SECOND; + ts_bw /= ts_diff; + bbr_log_type_bbrupd(bbr, 62, cts, + (ts_bw >> 32), + (ts_bw & 0xffffffff), 0, 0, + 0, 0, ts_diff, delivered); + if ((bbr->ts_can_raise) && + (ts_bw > bw)) { + bbr_log_type_bbrupd(bbr, 8, cts, + delivered, + ts_diff, + (bw >> 32), + (bw & 0x00000000ffffffff), + 0, 0, 0, 0); + bw = ts_bw; + } else if (ts_bw && (ts_bw < bw)) { + bbr_log_type_bbrupd(bbr, 7, cts, + delivered, + ts_diff, + (bw >> 32), + (bw & 0x00000000ffffffff), + 0, 0, 0, 0); + bw = ts_bw; + } + } + } + if (rsm->r_first_sent_time && + TSTMP_GT(rsm->r_tim_lastsent[(rsm->r_rtr_cnt -1)],rsm->r_first_sent_time)) { + uint64_t sbw, sti; + /* + * We use what was in flight at the time of our + * send and the size of this send to figure + * out what we have been sending at (amount). + * For the time we take from the time of + * the send of the first send outstanding + * until this send plus this sends pacing + * time. This gives us a good calculation + * as to the rate we have been sending at. + */ + + sbw = (uint64_t)(rsm->r_flight_at_send); + sbw *= (uint64_t)USECS_IN_SECOND; + sti = rsm->r_tim_lastsent[(rsm->r_rtr_cnt -1)] - rsm->r_first_sent_time; + sti += rsm->r_pacing_delay; + sbw /= sti; + if (sbw < bw) { + bbr_log_type_bbrupd(bbr, 6, cts, + delivered, + (uint32_t)sti, + (bw >> 32), + (uint32_t)bw, + rsm->r_first_sent_time, 0, (sbw >> 32), + (uint32_t)sbw); + bw = sbw; + } + } + /* Use the google algorithm for b/w measurements */ + bbr->r_ctl.rc_bbr_cur_del_rate = bw; + if ((rsm->r_app_limited == 0) || + (bw > get_filter_value(&bbr->r_ctl.rc_delrate))) { + tcp_bbr_commit_bw(bbr, cts); + bbr_log_type_bbrupd(bbr, 10, cts, (uint32_t)tim, delivered, + 0, 0, 0, 0, bbr->r_ctl.rc_del_time, rsm->r_del_time); + } + } +} + +static void +bbr_google_measurement(struct tcp_bbr *bbr, struct bbr_sendmap *rsm, uint32_t rtt, uint32_t cts) +{ + if (bbr->rc_in_persist == 0) { + /* We log only when not in persist */ + /* Translate to a Bytes Per Second */ + uint64_t tim, bw; + uint32_t upper, lower, delivered; + int no_apply = 0; + + if (TSTMP_GT(bbr->r_ctl.rc_del_time, rsm->r_del_time)) + tim = (uint64_t)(bbr->r_ctl.rc_del_time - rsm->r_del_time); + else + tim = 1; + /* + * Now that we have processed the tim (skipping the sample + * or possibly updating the time, go ahead and + * calculate the cdr. + */ + delivered = (bbr->r_ctl.rc_delivered - rsm->r_delivered); + bw = (uint64_t)delivered; + bw *= (uint64_t)USECS_IN_SECOND; + bw /= tim; + if (tim < bbr->r_ctl.rc_lowest_rtt) { + bbr_log_type_bbrupd(bbr, 99, cts, (uint32_t)tim, delivered, + tim, bbr->r_ctl.rc_lowest_rtt, 0, 0, 0, 0); + + no_apply = 1; + } + upper = (bw >> 32) & 0x00000000ffffffff; + lower = bw & 0x00000000ffffffff; + /* + * If we are using this b/w shove it in now so we + * can see in the trace viewer if it gets over-ridden. + */ + bbr->r_ctl.rc_bbr_cur_del_rate = bw; + /* Gate by the sending rate */ + if (rsm->r_first_sent_time && + TSTMP_GT(rsm->r_tim_lastsent[(rsm->r_rtr_cnt -1)],rsm->r_first_sent_time)) { + uint64_t sbw, sti; + /* + * We use what was in flight at the time of our + * send and the size of this send to figure + * out what we have been sending at (amount). + * For the time we take from the time of + * the send of the first send outstanding + * until this send plus this sends pacing + * time. This gives us a good calculation + * as to the rate we have been sending at. + */ + + sbw = (uint64_t)(rsm->r_flight_at_send); + sbw *= (uint64_t)USECS_IN_SECOND; + sti = rsm->r_tim_lastsent[(rsm->r_rtr_cnt -1)] - rsm->r_first_sent_time; + sti += rsm->r_pacing_delay; + sbw /= sti; + if (sbw < bw) { + bbr_log_type_bbrupd(bbr, 6, cts, + delivered, + (uint32_t)sti, + (bw >> 32), + (uint32_t)bw, + rsm->r_first_sent_time, 0, (sbw >> 32), + (uint32_t)sbw); + bw = sbw; + } + if ((sti > tim) && + (sti < bbr->r_ctl.rc_lowest_rtt)) { + bbr_log_type_bbrupd(bbr, 99, cts, (uint32_t)tim, delivered, + (uint32_t)sti, bbr->r_ctl.rc_lowest_rtt, 0, 0, 0, 0); + no_apply = 1; + } else + no_apply = 0; + } + bbr->r_ctl.rc_bbr_cur_del_rate = bw; + if ((no_apply == 0) && + ((rsm->r_app_limited == 0) || + (bw > get_filter_value(&bbr->r_ctl.rc_delrate)))) { + tcp_bbr_commit_bw(bbr, cts); + bbr_log_type_bbrupd(bbr, 10, cts, (uint32_t)tim, delivered, + 0, 0, 0, 0, bbr->r_ctl.rc_del_time, rsm->r_del_time); + } + } +} + + +static void +bbr_update_bbr_info(struct tcp_bbr *bbr, struct bbr_sendmap *rsm, uint32_t rtt, uint32_t cts, uint32_t tsin, + uint32_t uts, int32_t match, uint32_t rsm_send_time, int32_t ack_type, struct tcpopt *to) +{ + uint64_t old_rttprop; + + /* Update our delivery time and amount */ + bbr->r_ctl.rc_delivered += (rsm->r_end - rsm->r_start); + bbr->r_ctl.rc_del_time = cts; + if (rtt == 0) { + /* + * 0 means its a retransmit, for now we don't use these for + * the rest of BBR. + */ + return; + } + if ((bbr->rc_use_google == 0) && + (match != BBR_RTT_BY_EXACTMATCH) && + (match != BBR_RTT_BY_TIMESTAMP)){ + /* + * We get a lot of rtt updates, lets not pay attention to + * any that are not an exact match. That way we don't have + * to worry about timestamps and the whole nonsense of + * unsure if its a retransmission etc (if we ever had the + * timestamp fixed to always have the last thing sent this + * would not be a issue). + */ + return; + } + if ((bbr_no_retran && bbr->rc_use_google) && + (match != BBR_RTT_BY_EXACTMATCH) && + (match != BBR_RTT_BY_TIMESTAMP)){ + /* + * We only do measurements in google mode + * with bbr_no_retran on for sure things. + */ + return; + } + /* Only update srtt if we know by exact match */ + tcp_bbr_xmit_timer(bbr, rtt, rsm_send_time, rsm->r_start, tsin); + if (ack_type == BBR_CUM_ACKED) + bbr->rc_ack_is_cumack = 1; + else + bbr->rc_ack_is_cumack = 0; + old_rttprop = bbr_get_rtt(bbr, BBR_RTT_PROP); + /* + * Note the following code differs to the original + * BBR spec. It calls for <= not <. However after a + * long discussion in email with Neal, he acknowledged + * that it should be < than so that we will have flows + * going into probe-rtt (we were seeing cases where that + * did not happen and caused ugly things to occur). We + * have added this agreed upon fix to our code base. + */ + if (rtt < old_rttprop) { + /* Update when we last saw a rtt drop */ + bbr_log_rtt_shrinks(bbr, cts, 0, rtt, __LINE__, BBR_RTTS_NEWRTT, 0); + bbr_set_reduced_rtt(bbr, cts, __LINE__); + } + bbr_log_type_bbrrttprop(bbr, rtt, (rsm ? rsm->r_end : 0), uts, cts, + match, rsm->r_start, rsm->r_flags); + apply_filter_min_small(&bbr->r_ctl.rc_rttprop, rtt, cts); + if (old_rttprop != bbr_get_rtt(bbr, BBR_RTT_PROP)) { + /* + * The RTT-prop moved, reset the target (may be a + * nop for some states). + */ + bbr_set_state_target(bbr, __LINE__); + if (bbr->rc_bbr_state == BBR_STATE_PROBE_RTT) + bbr_log_rtt_shrinks(bbr, cts, 0, 0, + __LINE__, BBR_RTTS_NEW_TARGET, 0); + else if (old_rttprop < bbr_get_rtt(bbr, BBR_RTT_PROP)) + /* It went up */ + bbr_check_probe_rtt_limits(bbr, cts); + } + if ((bbr->rc_use_google == 0) && + (match == BBR_RTT_BY_TIMESTAMP)) { + /* + * We don't do b/w update with + * these since they are not really + * reliable. + */ + return; + } + if (bbr->r_ctl.r_app_limited_until && + (bbr->r_ctl.rc_delivered >= bbr->r_ctl.r_app_limited_until)) { + /* We are no longer app-limited */ + bbr->r_ctl.r_app_limited_until = 0; + } + if (bbr->rc_use_google) { + bbr_google_measurement(bbr, rsm, rtt, cts); + } else { + bbr_nf_measurement(bbr, rsm, rtt, cts); + } +} + +/* + * Convert a timestamp that the main stack + * uses (milliseconds) into one that bbr uses + * (microseconds). Return that converted timestamp. + */ +static uint32_t +bbr_ts_convert(uint32_t cts) { + uint32_t sec, msec; + + sec = cts / MS_IN_USEC; + msec = cts - (MS_IN_USEC * sec); + return ((sec * USECS_IN_SECOND) + (msec * MS_IN_USEC)); +} + +/* + * Return 0 if we did not update the RTT time, return + * 1 if we did. + */ +static int +bbr_update_rtt(struct tcpcb *tp, struct tcp_bbr *bbr, + struct bbr_sendmap *rsm, struct tcpopt *to, uint32_t cts, int32_t ack_type, uint32_t th_ack) +{ + int32_t i; + uint32_t t, uts = 0; + + if ((rsm->r_flags & BBR_ACKED) || + (rsm->r_flags & BBR_WAS_RENEGED) || + (rsm->r_flags & BBR_RXT_CLEARED)) { + /* Already done */ + return (0); + } + if (rsm->r_rtr_cnt == 1) { + /* + * Only one transmit. Hopefully the normal case. + */ + if (TSTMP_GT(cts, rsm->r_tim_lastsent[0])) + t = cts - rsm->r_tim_lastsent[0]; + else + t = 1; + if ((int)t <= 0) + t = 1; + bbr->r_ctl.rc_last_rtt = t; + bbr_update_bbr_info(bbr, rsm, t, cts, to->to_tsecr, 0, + BBR_RTT_BY_EXACTMATCH, rsm->r_tim_lastsent[0], ack_type, to); + return (1); + } + /* Convert to usecs */ + if ((bbr_can_use_ts_for_rtt == 1) && + (bbr->rc_use_google == 1) && + (ack_type == BBR_CUM_ACKED) && + (to->to_flags & TOF_TS) && + (to->to_tsecr != 0)) { + + t = tcp_tv_to_mssectick(&bbr->rc_tv) - to->to_tsecr; + if (t < 1) + t = 1; + t *= MS_IN_USEC; + bbr_update_bbr_info(bbr, rsm, t, cts, to->to_tsecr, 0, + BBR_RTT_BY_TIMESTAMP, + rsm->r_tim_lastsent[(rsm->r_rtr_cnt-1)], + ack_type, to); + return (1); + } + uts = bbr_ts_convert(to->to_tsecr); + if ((to->to_flags & TOF_TS) && + (to->to_tsecr != 0) && + (ack_type == BBR_CUM_ACKED) && + ((rsm->r_flags & BBR_OVERMAX) == 0)) { + /* + * Now which timestamp does it match? In this block the ACK + * may be coming from a previous transmission. + */ + uint32_t fudge; + + fudge = BBR_TIMER_FUDGE; + for (i = 0; i < rsm->r_rtr_cnt; i++) { + if ((SEQ_GEQ(uts, (rsm->r_tim_lastsent[i] - fudge))) && + (SEQ_LEQ(uts, (rsm->r_tim_lastsent[i] + fudge)))) { + if (TSTMP_GT(cts, rsm->r_tim_lastsent[i])) + t = cts - rsm->r_tim_lastsent[i]; + else + t = 1; + if ((int)t <= 0) + t = 1; + bbr->r_ctl.rc_last_rtt = t; + bbr_update_bbr_info(bbr, rsm, t, cts, to->to_tsecr, uts, BBR_RTT_BY_TSMATCHING, + rsm->r_tim_lastsent[i], ack_type, to); + if ((i + 1) < rsm->r_rtr_cnt) { + /* Likely */ + bbr_earlier_retran(tp, bbr, rsm, t, cts, ack_type); + } else if (rsm->r_flags & BBR_TLP) { + bbr->rc_tlp_rtx_out = 0; + } + return (1); + } + } + /* Fall through if we can't find a matching timestamp */ + } + /* + * Ok its a SACK block that we retransmitted. or a windows + * machine without timestamps. We can tell nothing from the + * time-stamp since its not there or the time the peer last + * recieved a segment that moved forward its cum-ack point. + * + * Lets look at the last retransmit and see what we can tell + * (with BBR for space we only keep 2 note we have to keep + * at least 2 so the map can not be condensed more). + */ + i = rsm->r_rtr_cnt - 1; + if (TSTMP_GT(cts, rsm->r_tim_lastsent[i])) + t = cts - rsm->r_tim_lastsent[i]; + else + goto not_sure; + if (t < bbr->r_ctl.rc_lowest_rtt) { + /* + * We retransmitted and the ack came back in less + * than the smallest rtt we have observed in the + * windowed rtt. We most likey did an improper + * retransmit as outlined in 4.2 Step 3 point 2 in + * the rack-draft. + * + * Use the prior transmission to update all the + * information as long as there is only one prior + * transmission. + */ + if ((rsm->r_flags & BBR_OVERMAX) == 0) { +#ifdef BBR_INVARIANTS + if (rsm->r_rtr_cnt == 1) + panic("rsm:%p bbr:%p rsm has overmax and only 1 retranmit flags:%x?", rsm, bbr, rsm->r_flags); +#endif + i = rsm->r_rtr_cnt - 2; + if (TSTMP_GT(cts, rsm->r_tim_lastsent[i])) + t = cts - rsm->r_tim_lastsent[i]; + else + t = 1; + bbr_update_bbr_info(bbr, rsm, t, cts, to->to_tsecr, uts, BBR_RTT_BY_EARLIER_RET, + rsm->r_tim_lastsent[i], ack_type, to); + bbr_earlier_retran(tp, bbr, rsm, t, cts, ack_type); + } else { + /* + * Too many prior transmissions, just + * updated BBR delivered + */ +not_sure: + bbr_update_bbr_info(bbr, rsm, 0, cts, to->to_tsecr, uts, + BBR_RTT_BY_SOME_RETRAN, 0, ack_type, to); + } + } else { + /* + * We retransmitted it and the retransmit did the + * job. + */ + if (rsm->r_flags & BBR_TLP) + bbr->rc_tlp_rtx_out = 0; + if ((rsm->r_flags & BBR_OVERMAX) == 0) + bbr_update_bbr_info(bbr, rsm, t, cts, to->to_tsecr, uts, + BBR_RTT_BY_THIS_RETRAN, 0, ack_type, to); + else + bbr_update_bbr_info(bbr, rsm, 0, cts, to->to_tsecr, uts, + BBR_RTT_BY_SOME_RETRAN, 0, ack_type, to); + return (1); + } + return (0); +} + +/* + * Mark the SACK_PASSED flag on all entries prior to rsm send wise. + */ +static void +bbr_log_sack_passed(struct tcpcb *tp, + struct tcp_bbr *bbr, struct bbr_sendmap *rsm) +{ + struct bbr_sendmap *nrsm; + + nrsm = rsm; + TAILQ_FOREACH_REVERSE_FROM(nrsm, &bbr->r_ctl.rc_tmap, + bbr_head, r_tnext) { + if (nrsm == rsm) { + /* Skip orginal segment he is acked */ + continue; + } + if (nrsm->r_flags & BBR_ACKED) { + /* Skip ack'd segments */ + continue; + } + if (nrsm->r_flags & BBR_SACK_PASSED) { + /* + * We found one that is already marked + * passed, we have been here before and + * so all others below this are marked. + */ + break; + } + BBR_STAT_INC(bbr_sack_passed); + nrsm->r_flags |= BBR_SACK_PASSED; + if (((nrsm->r_flags & BBR_MARKED_LOST) == 0) && + bbr_is_lost(bbr, nrsm, bbr->r_ctl.rc_rcvtime)) { + bbr->r_ctl.rc_lost += nrsm->r_end - nrsm->r_start; + bbr->r_ctl.rc_lost_bytes += nrsm->r_end - nrsm->r_start; + nrsm->r_flags |= BBR_MARKED_LOST; + } + nrsm->r_flags &= ~BBR_WAS_SACKPASS; + } +} + +/* + * Returns the number of bytes that were + * newly ack'd by sack blocks. + */ +static uint32_t +bbr_proc_sack_blk(struct tcpcb *tp, struct tcp_bbr *bbr, struct sackblk *sack, + struct tcpopt *to, struct bbr_sendmap **prsm, uint32_t cts) +{ + int32_t times = 0; + uint32_t start, end, maxseg, changed = 0; + struct bbr_sendmap *rsm, *nrsm; + int32_t used_ref = 1; + uint8_t went_back = 0, went_fwd = 0; + + maxseg = tp->t_maxseg - bbr->rc_last_options; + start = sack->start; + end = sack->end; + rsm = *prsm; + if (rsm == NULL) + used_ref = 0; + + /* Do we locate the block behind where we last were? */ + if (rsm && SEQ_LT(start, rsm->r_start)) { + went_back = 1; + TAILQ_FOREACH_REVERSE_FROM(rsm, &bbr->r_ctl.rc_map, bbr_head, r_next) { + if (SEQ_GEQ(start, rsm->r_start) && + SEQ_LT(start, rsm->r_end)) { + goto do_rest_ofb; + } + } + } +start_at_beginning: + went_fwd = 1; + /* + * Ok lets locate the block where this guy is fwd from rsm (if its + * set) + */ + TAILQ_FOREACH_FROM(rsm, &bbr->r_ctl.rc_map, r_next) { + if (SEQ_GEQ(start, rsm->r_start) && + SEQ_LT(start, rsm->r_end)) { + break; + } + } +do_rest_ofb: + if (rsm == NULL) { + /* + * This happens when we get duplicate sack blocks with the + * same end. For example SACK 4: 100 SACK 3: 100 The sort + * will not change there location so we would just start at + * the end of the first one and get lost. + */ + if (tp->t_flags & TF_SENTFIN) { + /* + * Check to see if we have not logged the FIN that + * went out. + */ + nrsm = TAILQ_LAST_FAST(&bbr->r_ctl.rc_map, bbr_sendmap, r_next); + if (nrsm && (nrsm->r_end + 1) == tp->snd_max) { + /* + * Ok we did not get the FIN logged. + */ + nrsm->r_end++; + rsm = nrsm; + goto do_rest_ofb; + } + } + if (times == 1) { +#ifdef BBR_INVARIANTS + panic("tp:%p bbr:%p sack:%p to:%p prsm:%p", + tp, bbr, sack, to, prsm); +#else + goto out; +#endif + } + times++; + BBR_STAT_INC(bbr_sack_proc_restart); + rsm = NULL; + goto start_at_beginning; + } + /* Ok we have an ACK for some piece of rsm */ + if (rsm->r_start != start) { + /* + * Need to split this in two pieces the before and after. + */ + if (bbr_sack_mergable(rsm, start, end)) + nrsm = bbr_alloc_full_limit(bbr); + else + nrsm = bbr_alloc_limit(bbr, BBR_LIMIT_TYPE_SPLIT); + if (nrsm == NULL) { + /* We could not allocate ignore the sack */ + struct sackblk blk; + + blk.start = start; + blk.end = end; + sack_filter_reject(&bbr->r_ctl.bbr_sf, &blk); + goto out; + } + bbr_clone_rsm(bbr, nrsm, rsm, start); + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_map, rsm, nrsm, r_next); + if (rsm->r_in_tmap) { + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_tmap, rsm, nrsm, r_tnext); + nrsm->r_in_tmap = 1; + } + rsm->r_flags &= (~BBR_HAS_FIN); + rsm = nrsm; + } + if (SEQ_GEQ(end, rsm->r_end)) { + /* + * The end of this block is either beyond this guy or right + * at this guy. + */ + if ((rsm->r_flags & BBR_ACKED) == 0) { + bbr_update_rtt(tp, bbr, rsm, to, cts, BBR_SACKED, 0); + changed += (rsm->r_end - rsm->r_start); + bbr->r_ctl.rc_sacked += (rsm->r_end - rsm->r_start); + bbr_log_sack_passed(tp, bbr, rsm); + if (rsm->r_flags & BBR_MARKED_LOST) { + bbr->r_ctl.rc_lost_bytes -= rsm->r_end - rsm->r_start; + } + /* Is Reordering occuring? */ + if (rsm->r_flags & BBR_SACK_PASSED) { + BBR_STAT_INC(bbr_reorder_seen); + bbr->r_ctl.rc_reorder_ts = cts; + if (rsm->r_flags & BBR_MARKED_LOST) { + bbr->r_ctl.rc_lost -= rsm->r_end - rsm->r_start; + if (SEQ_GT(bbr->r_ctl.rc_lt_lost, bbr->r_ctl.rc_lost)) + /* LT sampling also needs adjustment */ + bbr->r_ctl.rc_lt_lost = bbr->r_ctl.rc_lost; + } + } + rsm->r_flags |= BBR_ACKED; + rsm->r_flags &= ~(BBR_TLP|BBR_WAS_RENEGED|BBR_RXT_CLEARED|BBR_MARKED_LOST); + if (rsm->r_in_tmap) { + TAILQ_REMOVE(&bbr->r_ctl.rc_tmap, rsm, r_tnext); + rsm->r_in_tmap = 0; + } + } + bbr_isit_a_pkt_epoch(bbr, cts, rsm, __LINE__, BBR_SACKED); + if (end == rsm->r_end) { + /* This block only - done */ + goto out; + } + /* There is more not coverend by this rsm move on */ + start = rsm->r_end; + nrsm = TAILQ_NEXT(rsm, r_next); + rsm = nrsm; + times = 0; + goto do_rest_ofb; + } + if (rsm->r_flags & BBR_ACKED) { + /* Been here done that */ + goto out; + } + /* Ok we need to split off this one at the tail */ + if (bbr_sack_mergable(rsm, start, end)) + nrsm = bbr_alloc_full_limit(bbr); + else + nrsm = bbr_alloc_limit(bbr, BBR_LIMIT_TYPE_SPLIT); + if (nrsm == NULL) { + /* failed XXXrrs what can we do but loose the sack info? */ + struct sackblk blk; + + blk.start = start; + blk.end = end; + sack_filter_reject(&bbr->r_ctl.bbr_sf, &blk); + goto out; + } + /* Clone it */ + bbr_clone_rsm(bbr, nrsm, rsm, end); + /* The sack block does not cover this guy fully */ + rsm->r_flags &= (~BBR_HAS_FIN); + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_map, rsm, nrsm, r_next); + if (rsm->r_in_tmap) { + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_tmap, rsm, nrsm, r_tnext); + nrsm->r_in_tmap = 1; + } + nrsm->r_dupack = 0; + bbr_update_rtt(tp, bbr, rsm, to, cts, BBR_SACKED, 0); + bbr_isit_a_pkt_epoch(bbr, cts, rsm, __LINE__, BBR_SACKED); + changed += (rsm->r_end - rsm->r_start); + bbr->r_ctl.rc_sacked += (rsm->r_end - rsm->r_start); + bbr_log_sack_passed(tp, bbr, rsm); + /* Is Reordering occuring? */ + if (rsm->r_flags & BBR_MARKED_LOST) { + bbr->r_ctl.rc_lost_bytes -= rsm->r_end - rsm->r_start; + } + if (rsm->r_flags & BBR_SACK_PASSED) { + BBR_STAT_INC(bbr_reorder_seen); + bbr->r_ctl.rc_reorder_ts = cts; + if (rsm->r_flags & BBR_MARKED_LOST) { + bbr->r_ctl.rc_lost -= rsm->r_end - rsm->r_start; + if (SEQ_GT(bbr->r_ctl.rc_lt_lost, bbr->r_ctl.rc_lost)) + /* LT sampling also needs adjustment */ + bbr->r_ctl.rc_lt_lost = bbr->r_ctl.rc_lost; + } + } + rsm->r_flags &= ~(BBR_TLP|BBR_WAS_RENEGED|BBR_RXT_CLEARED|BBR_MARKED_LOST); + rsm->r_flags |= BBR_ACKED; + if (rsm->r_in_tmap) { + TAILQ_REMOVE(&bbr->r_ctl.rc_tmap, rsm, r_tnext); + rsm->r_in_tmap = 0; + } +out: + if (rsm && (rsm->r_flags & BBR_ACKED)) { + /* + * Now can we merge this newly acked + * block with either the previous or + * next block? + */ + nrsm = TAILQ_NEXT(rsm, r_next); + if (nrsm && + (nrsm->r_flags & BBR_ACKED)) { + /* yep this and next can be merged */ + rsm = bbr_merge_rsm(bbr, rsm, nrsm); + } + /* Now what about the previous? */ + nrsm = TAILQ_PREV(rsm, bbr_head, r_next); + if (nrsm && + (nrsm->r_flags & BBR_ACKED)) { + /* yep the previous and this can be merged */ + rsm = bbr_merge_rsm(bbr, nrsm, rsm); + } + } + if (used_ref == 0) { + BBR_STAT_INC(bbr_sack_proc_all); + } else { + BBR_STAT_INC(bbr_sack_proc_short); + } + if (went_fwd && went_back) { + BBR_STAT_INC(bbr_sack_search_both); + } else if (went_fwd) { + BBR_STAT_INC(bbr_sack_search_fwd); + } else if (went_back) { + BBR_STAT_INC(bbr_sack_search_back); + } + /* Save off where the next seq is */ + if (rsm) + bbr->r_ctl.rc_sacklast = TAILQ_NEXT(rsm, r_next); + else + bbr->r_ctl.rc_sacklast = NULL; + *prsm = rsm; + return (changed); +} + + +static void inline +bbr_peer_reneges(struct tcp_bbr *bbr, struct bbr_sendmap *rsm, tcp_seq th_ack) +{ + struct bbr_sendmap *tmap; + + BBR_STAT_INC(bbr_reneges_seen); + tmap = NULL; + while (rsm && (rsm->r_flags & BBR_ACKED)) { + /* Its no longer sacked, mark it so */ + uint32_t oflags; + bbr->r_ctl.rc_sacked -= (rsm->r_end - rsm->r_start); +#ifdef BBR_INVARIANTS + if (rsm->r_in_tmap) { + panic("bbr:%p rsm:%p flags:0x%x in tmap?", + bbr, rsm, rsm->r_flags); + } +#endif + oflags = rsm->r_flags; + if (rsm->r_flags & BBR_MARKED_LOST) { + bbr->r_ctl.rc_lost -= rsm->r_end - rsm->r_start; + bbr->r_ctl.rc_lost_bytes -= rsm->r_end - rsm->r_start; + if (SEQ_GT(bbr->r_ctl.rc_lt_lost, bbr->r_ctl.rc_lost)) + /* LT sampling also needs adjustment */ + bbr->r_ctl.rc_lt_lost = bbr->r_ctl.rc_lost; + } + rsm->r_flags &= ~(BBR_ACKED | BBR_SACK_PASSED | BBR_WAS_SACKPASS | BBR_MARKED_LOST); + rsm->r_flags |= BBR_WAS_RENEGED; + rsm->r_flags |= BBR_RXT_CLEARED; + bbr_log_type_rsmclear(bbr, bbr->r_ctl.rc_rcvtime, rsm, oflags, __LINE__); + /* Rebuild it into our tmap */ + if (tmap == NULL) { + TAILQ_INSERT_HEAD(&bbr->r_ctl.rc_tmap, rsm, r_tnext); + tmap = rsm; + } else { + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_tmap, tmap, rsm, r_tnext); + tmap = rsm; + } + tmap->r_in_tmap = 1; + /* + * XXXrrs Delivered? Should we do anything here? + * + * Of course we don't on a rxt timeout so maybe its ok that + * we don't? + * + * For now lets not. + */ + rsm = TAILQ_NEXT(rsm, r_next); + } + /* + * Now lets possibly clear the sack filter so we start recognizing + * sacks that cover this area. + */ + sack_filter_clear(&bbr->r_ctl.bbr_sf, th_ack); +} + +static void +bbr_log_syn(struct tcpcb *tp, struct tcpopt *to) +{ + struct tcp_bbr *bbr; + struct bbr_sendmap *rsm; + uint32_t cts; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + cts = bbr->r_ctl.rc_rcvtime; + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map); + if (rsm && (rsm->r_flags & BBR_HAS_SYN)) { + if ((rsm->r_end - rsm->r_start) <= 1) { + /* Log out the SYN completely */ + bbr->r_ctl.rc_holes_rxt -= rsm->r_rtr_bytes; + rsm->r_rtr_bytes = 0; + TAILQ_REMOVE(&bbr->r_ctl.rc_map, rsm, r_next); + if (rsm->r_in_tmap) { + TAILQ_REMOVE(&bbr->r_ctl.rc_tmap, rsm, r_tnext); + rsm->r_in_tmap = 0; + } + if (bbr->r_ctl.rc_next == rsm) { + /* scoot along the marker */ + bbr->r_ctl.rc_next = TAILQ_FIRST(&bbr->r_ctl.rc_map); + } + if (to != NULL) + bbr_update_rtt(tp, bbr, rsm, to, cts, BBR_CUM_ACKED, 0); + bbr_free(bbr, rsm); + } else { + /* There is more (Fast open)? strip out SYN. */ + rsm->r_flags &= ~BBR_HAS_SYN; + rsm->r_start++; + } + } +} + +/* + * Returns the number of bytes that were + * acknowledged by SACK blocks. + */ + +static uint32_t +bbr_log_ack(struct tcpcb *tp, struct tcpopt *to, struct tcphdr *th, + uint32_t *prev_acked) +{ + uint32_t changed, last_seq, entered_recovery = 0; + struct tcp_bbr *bbr; + struct bbr_sendmap *rsm; + struct sackblk sack, sack_blocks[TCP_MAX_SACK + 1]; + register uint32_t th_ack; + int32_t i, j, k, new_sb, num_sack_blks = 0; + uint32_t cts, acked, ack_point, sack_changed = 0; + uint32_t p_maxseg, maxseg, p_acked = 0; + + INP_WLOCK_ASSERT(tp->t_inpcb); + if (th->th_flags & TH_RST) { + /* We don't log resets */ + return (0); + } + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + cts = bbr->r_ctl.rc_rcvtime; + + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map); + changed = 0; + maxseg = tp->t_maxseg - bbr->rc_last_options; + p_maxseg = min(bbr->r_ctl.rc_pace_max_segs, maxseg); + th_ack = th->th_ack; + if (SEQ_GT(th_ack, tp->snd_una)) { + acked = th_ack - tp->snd_una; + bbr_log_progress_event(bbr, tp, ticks, PROGRESS_UPDATE, __LINE__); + bbr->rc_tp->t_acktime = ticks; + } else + acked = 0; + if (SEQ_LEQ(th_ack, tp->snd_una)) { + /* Only sent here for sack processing */ + goto proc_sack; + } + if (rsm && SEQ_GT(th_ack, rsm->r_start)) { + changed = th_ack - rsm->r_start; + } else if ((rsm == NULL) && ((th_ack - 1) == tp->iss)) { + /* + * For the SYN incoming case we will not have called + * tcp_output for the sending of the SYN, so there will be + * no map. All other cases should probably be a panic. + */ + if ((to->to_flags & TOF_TS) && (to->to_tsecr != 0)) { + /* + * We have a timestamp that can be used to generate + * an initial RTT. + */ + uint32_t ts, now, rtt; + + ts = bbr_ts_convert(to->to_tsecr); + now = bbr_ts_convert(tcp_tv_to_mssectick(&bbr->rc_tv)); + rtt = now - ts; + if (rtt < 1) + rtt = 1; + bbr_log_type_bbrrttprop(bbr, rtt, + tp->iss, 0, cts, + BBR_RTT_BY_TIMESTAMP, tp->iss, 0); + apply_filter_min_small(&bbr->r_ctl.rc_rttprop, rtt, cts); + changed = 1; + bbr->r_wanted_output = 1; + goto out; + } + goto proc_sack; + } else if (rsm == NULL) { + goto out; + } + if (changed) { + /* + * The ACK point is advancing to th_ack, we must drop off + * the packets in the rack log and calculate any eligble + * RTT's. + */ + bbr->r_wanted_output = 1; +more: + if (rsm == NULL) { + + if (tp->t_flags & TF_SENTFIN) { + /* if we send a FIN we will not hav a map */ + goto proc_sack; + } +#ifdef BBR_INVARIANTS + panic("No rack map tp:%p for th:%p state:%d bbr:%p snd_una:%u snd_max:%u chg:%d\n", + tp, + th, tp->t_state, bbr, + tp->snd_una, tp->snd_max, changed); +#endif + goto proc_sack; + } + } + if (SEQ_LT(th_ack, rsm->r_start)) { + /* Huh map is missing this */ +#ifdef BBR_INVARIANTS + printf("Rack map starts at r_start:%u for th_ack:%u huh? ts:%d rs:%d bbr:%p\n", + rsm->r_start, + th_ack, tp->t_state, + bbr->r_state, bbr); + panic("th-ack is bad bbr:%p tp:%p", bbr, tp); +#endif + goto proc_sack; + } else if (th_ack == rsm->r_start) { + /* None here to ack */ + goto proc_sack; + } + /* + * Clear the dup ack counter, it will + * either be freed or if there is some + * remaining we need to start it at zero. + */ + rsm->r_dupack = 0; + /* Now do we consume the whole thing? */ + if (SEQ_GEQ(th_ack, rsm->r_end)) { + /* Its all consumed. */ + uint32_t left; + + if (rsm->r_flags & BBR_ACKED) { + /* + * It was acked on the scoreboard -- remove it from + * total + */ + p_acked += (rsm->r_end - rsm->r_start); + bbr->r_ctl.rc_sacked -= (rsm->r_end - rsm->r_start); + if (bbr->r_ctl.rc_sacked == 0) + bbr->r_ctl.rc_sacklast = NULL; + } else { + bbr_update_rtt(tp, bbr, rsm, to, cts, BBR_CUM_ACKED, th_ack); + if (rsm->r_flags & BBR_MARKED_LOST) { + bbr->r_ctl.rc_lost_bytes -= rsm->r_end - rsm->r_start; + } + if (rsm->r_flags & BBR_SACK_PASSED) { + /* + * There are acked segments ACKED on the + * scoreboard further up. We are seeing + * reordering. + */ + BBR_STAT_INC(bbr_reorder_seen); + bbr->r_ctl.rc_reorder_ts = cts; + if (rsm->r_flags & BBR_MARKED_LOST) { + bbr->r_ctl.rc_lost -= rsm->r_end - rsm->r_start; + if (SEQ_GT(bbr->r_ctl.rc_lt_lost, bbr->r_ctl.rc_lost)) + /* LT sampling also needs adjustment */ + bbr->r_ctl.rc_lt_lost = bbr->r_ctl.rc_lost; + } + } + rsm->r_flags &= ~BBR_MARKED_LOST; + } + bbr->r_ctl.rc_holes_rxt -= rsm->r_rtr_bytes; + rsm->r_rtr_bytes = 0; + TAILQ_REMOVE(&bbr->r_ctl.rc_map, rsm, r_next); + if (rsm->r_in_tmap) { + TAILQ_REMOVE(&bbr->r_ctl.rc_tmap, rsm, r_tnext); + rsm->r_in_tmap = 0; + } + if (bbr->r_ctl.rc_next == rsm) { + /* scoot along the marker */ + bbr->r_ctl.rc_next = TAILQ_FIRST(&bbr->r_ctl.rc_map); + } + bbr_isit_a_pkt_epoch(bbr, cts, rsm, __LINE__, BBR_CUM_ACKED); + /* Adjust the packet counts */ + left = th_ack - rsm->r_end; + /* Free back to zone */ + bbr_free(bbr, rsm); + if (left) { + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map); + goto more; + } + goto proc_sack; + } + if (rsm->r_flags & BBR_ACKED) { + /* + * It was acked on the scoreboard -- remove it from total + * for the part being cum-acked. + */ + p_acked += (rsm->r_end - rsm->r_start); + bbr->r_ctl.rc_sacked -= (th_ack - rsm->r_start); + if (bbr->r_ctl.rc_sacked == 0) + bbr->r_ctl.rc_sacklast = NULL; + } else { + /* + * It was acked up to th_ack point for the first time + */ + struct bbr_sendmap lrsm; + + memcpy(&lrsm, rsm, sizeof(struct bbr_sendmap)); + lrsm.r_end = th_ack; + bbr_update_rtt(tp, bbr, &lrsm, to, cts, BBR_CUM_ACKED, th_ack); + } + if ((rsm->r_flags & BBR_MARKED_LOST) && + ((rsm->r_flags & BBR_ACKED) == 0)) { + /* + * It was marked lost and partly ack'd now + * for the first time. We lower the rc_lost_bytes + * and still leave it MARKED. + */ + bbr->r_ctl.rc_lost_bytes -= th_ack - rsm->r_start; + } + bbr_isit_a_pkt_epoch(bbr, cts, rsm, __LINE__, BBR_CUM_ACKED); + bbr->r_ctl.rc_holes_rxt -= rsm->r_rtr_bytes; + rsm->r_rtr_bytes = 0; + /* adjust packet count */ + rsm->r_start = th_ack; +proc_sack: + /* Check for reneging */ + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map); + if (rsm && (rsm->r_flags & BBR_ACKED) && (th_ack == rsm->r_start)) { + /* + * The peer has moved snd_una up to the edge of this send, + * i.e. one that it had previously acked. The only way that + * can be true if the peer threw away data (space issues) + * that it had previously sacked (else it would have given + * us snd_una up to (rsm->r_end). We need to undo the acked + * markings here. + * + * Note we have to look to make sure th_ack is our + * rsm->r_start in case we get an old ack where th_ack is + * behind snd_una. + */ + bbr_peer_reneges(bbr, rsm, th->th_ack); + } + if ((to->to_flags & TOF_SACK) == 0) { + /* We are done nothing left to log */ + goto out; + } + rsm = TAILQ_LAST_FAST(&bbr->r_ctl.rc_map, bbr_sendmap, r_next); + if (rsm) { + last_seq = rsm->r_end; + } else { + last_seq = tp->snd_max; + } + /* Sack block processing */ + if (SEQ_GT(th_ack, tp->snd_una)) + ack_point = th_ack; + else + ack_point = tp->snd_una; + for (i = 0; i < to->to_nsacks; i++) { + bcopy((to->to_sacks + i * TCPOLEN_SACK), + &sack, sizeof(sack)); + sack.start = ntohl(sack.start); + sack.end = ntohl(sack.end); + if (SEQ_GT(sack.end, sack.start) && + SEQ_GT(sack.start, ack_point) && + SEQ_LT(sack.start, tp->snd_max) && + SEQ_GT(sack.end, ack_point) && + SEQ_LEQ(sack.end, tp->snd_max)) { + if ((bbr->r_ctl.rc_num_small_maps_alloced > bbr_sack_block_limit) && + (SEQ_LT(sack.end, last_seq)) && + ((sack.end - sack.start) < (p_maxseg / 8))) { + /* + * Not the last piece and its smaller than + * 1/8th of a p_maxseg. We ignore this. + */ + BBR_STAT_INC(bbr_runt_sacks); + continue; + } + sack_blocks[num_sack_blks] = sack; + num_sack_blks++; +#ifdef NETFLIX_STATS + } else if (SEQ_LEQ(sack.start, th_ack) && + SEQ_LEQ(sack.end, th_ack)) { + /* + * Its a D-SACK block. + */ + tcp_record_dsack(sack.start, sack.end); +#endif + } + } + if (num_sack_blks == 0) + goto out; + /* + * Sort the SACK blocks so we can update the rack scoreboard with + * just one pass. + */ + new_sb = sack_filter_blks(&bbr->r_ctl.bbr_sf, sack_blocks, + num_sack_blks, th->th_ack); + ctf_log_sack_filter(bbr->rc_tp, new_sb, sack_blocks); + BBR_STAT_ADD(bbr_sack_blocks, num_sack_blks); + BBR_STAT_ADD(bbr_sack_blocks_skip, (num_sack_blks - new_sb)); + num_sack_blks = new_sb; + if (num_sack_blks < 2) { + goto do_sack_work; + } + /* Sort the sacks */ + for (i = 0; i < num_sack_blks; i++) { + for (j = i + 1; j < num_sack_blks; j++) { + if (SEQ_GT(sack_blocks[i].end, sack_blocks[j].end)) { + sack = sack_blocks[i]; + sack_blocks[i] = sack_blocks[j]; + sack_blocks[j] = sack; + } + } + } + /* + * Now are any of the sack block ends the same (yes some + * implememtations send these)? + */ +again: + if (num_sack_blks > 1) { + for (i = 0; i < num_sack_blks; i++) { + for (j = i + 1; j < num_sack_blks; j++) { + if (sack_blocks[i].end == sack_blocks[j].end) { + /* + * Ok these two have the same end we + * want the smallest end and then + * throw away the larger and start + * again. + */ + if (SEQ_LT(sack_blocks[j].start, sack_blocks[i].start)) { + /* + * The second block covers + * more area use that + */ + sack_blocks[i].start = sack_blocks[j].start; + } + /* + * Now collapse out the dup-sack and + * lower the count + */ + for (k = (j + 1); k < num_sack_blks; k++) { + sack_blocks[j].start = sack_blocks[k].start; + sack_blocks[j].end = sack_blocks[k].end; + j++; + } + num_sack_blks--; + goto again; + } + } + } + } +do_sack_work: + rsm = bbr->r_ctl.rc_sacklast; + for (i = 0; i < num_sack_blks; i++) { + acked = bbr_proc_sack_blk(tp, bbr, &sack_blocks[i], to, &rsm, cts); + if (acked) { + bbr->r_wanted_output = 1; + changed += acked; + sack_changed += acked; + } + } +out: + *prev_acked = p_acked; + if ((sack_changed) && (!IN_RECOVERY(tp->t_flags))) { + /* + * Ok we have a high probability that we need to go in to + * recovery since we have data sack'd + */ + struct bbr_sendmap *rsm; + + rsm = bbr_check_recovery_mode(tp, bbr, cts); + if (rsm) { + /* Enter recovery */ + entered_recovery = 1; + bbr->r_wanted_output = 1; + /* + * When we enter recovery we need to assure we send + * one packet. + */ + if (bbr->r_ctl.rc_resend == NULL) { + bbr->r_ctl.rc_resend = rsm; + } + } + } + if (IN_RECOVERY(tp->t_flags) && (entered_recovery == 0)) { + /* + * See if we need to rack-retransmit anything if so set it + * up as the thing to resend assuming something else is not + * already in that position. + */ + if (bbr->r_ctl.rc_resend == NULL) { + bbr->r_ctl.rc_resend = bbr_check_recovery_mode(tp, bbr, cts); + } + } + /* + * We return the amount that changed via sack, this is used by the + * ack-received code to augment what was changed between th_ack <-> + * snd_una. + */ + return (sack_changed); +} + +static void +bbr_strike_dupack(struct tcp_bbr *bbr) +{ + struct bbr_sendmap *rsm; + + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_tmap); + if (rsm && (rsm->r_dupack < 0xff)) { + rsm->r_dupack++; + if (rsm->r_dupack >= DUP_ACK_THRESHOLD) + bbr->r_wanted_output = 1; + } +} + +/* + * Return value of 1, we do not need to call bbr_process_data(). + * return value of 0, bbr_process_data can be called. + * For ret_val if its 0 the TCB is locked and valid, if its non-zero + * its unlocked and probably unsafe to touch the TCB. + */ +static int +bbr_process_ack(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, + uint32_t tiwin, int32_t tlen, + int32_t * ofia, int32_t thflags, int32_t * ret_val) +{ + int32_t ourfinisacked = 0; + int32_t acked_amount; + uint16_t nsegs; + int32_t acked; + uint32_t lost, sack_changed = 0; + struct mbuf *mfree; + struct tcp_bbr *bbr; + uint32_t prev_acked = 0; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + lost = bbr->r_ctl.rc_lost; + nsegs = max(1, m->m_pkthdr.lro_nsegs); + if (SEQ_GT(th->th_ack, tp->snd_max)) { + ctf_do_dropafterack(m, tp, th, thflags, tlen, ret_val); + bbr->r_wanted_output = 1; + return (1); + } + if (SEQ_GEQ(th->th_ack, tp->snd_una) || to->to_nsacks) { + /* Process the ack */ + if (bbr->rc_in_persist) + tp->t_rxtshift = 0; + if ((th->th_ack == tp->snd_una) && (tiwin == tp->snd_wnd)) + bbr_strike_dupack(bbr); + sack_changed = bbr_log_ack(tp, to, th, &prev_acked); + } + bbr_lt_bw_sampling(bbr, bbr->r_ctl.rc_rcvtime, (bbr->r_ctl.rc_lost > lost)); + if (__predict_false(SEQ_LEQ(th->th_ack, tp->snd_una))) { + /* + * Old ack, behind the last one rcv'd or a duplicate ack + * with SACK info. + */ + if (th->th_ack == tp->snd_una) { + bbr_ack_received(tp, bbr, th, 0, sack_changed, prev_acked, __LINE__, 0); + if (bbr->r_state == TCPS_SYN_SENT) { + /* + * Special case on where we sent SYN. When + * the SYN-ACK is processed in syn_sent + * state it bumps the snd_una. This causes + * us to hit here even though we did ack 1 + * byte. + * + * Go through the nothing left case so we + * send data. + */ + goto nothing_left; + } + } + return (0); + } + /* + * If we reach this point, ACK is not a duplicate, i.e., it ACKs + * something we sent. + */ + if (tp->t_flags & TF_NEEDSYN) { + /* + * T/TCP: Connection was half-synchronized, and our SYN has + * been ACK'd (so connection is now fully synchronized). Go + * to non-starred state, increment snd_una for ACK of SYN, + * and check if we can do window scaling. + */ + tp->t_flags &= ~TF_NEEDSYN; + tp->snd_una++; + /* Do window scaling? */ + if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) == + (TF_RCVD_SCALE | TF_REQ_SCALE)) { + tp->rcv_scale = tp->request_r_scale; + /* Send window already scaled. */ + } + } + INP_WLOCK_ASSERT(tp->t_inpcb); + + acked = BYTES_THIS_ACK(tp, th); + TCPSTAT_ADD(tcps_rcvackpack, (int)nsegs); + TCPSTAT_ADD(tcps_rcvackbyte, acked); + + /* + * If we just performed our first retransmit, and the ACK arrives + * within our recovery window, then it was a mistake to do the + * retransmit in the first place. Recover our original cwnd and + * ssthresh, and proceed to transmit where we left off. + */ + if (tp->t_flags & TF_PREVVALID) { + tp->t_flags &= ~TF_PREVVALID; + if (tp->t_rxtshift == 1 && + (int)(ticks - tp->t_badrxtwin) < 0) + bbr_cong_signal(tp, th, CC_RTO_ERR, NULL); + } + SOCKBUF_LOCK(&so->so_snd); + acked_amount = min(acked, (int)sbavail(&so->so_snd)); + tp->snd_wnd -= acked_amount; + mfree = sbcut_locked(&so->so_snd, acked_amount); + /* NB: sowwakeup_locked() does an implicit unlock. */ + sowwakeup_locked(so); + m_freem(mfree); + if (SEQ_GT(th->th_ack, tp->snd_una)) { + bbr_collapse_rtt(tp, bbr, TCP_REXMTVAL(tp)); + } + tp->snd_una = th->th_ack; + bbr_ack_received(tp, bbr, th, acked, sack_changed, prev_acked, __LINE__, (bbr->r_ctl.rc_lost - lost)); + if (IN_RECOVERY(tp->t_flags)) { + if (SEQ_LT(th->th_ack, tp->snd_recover) && + (SEQ_LT(th->th_ack, tp->snd_max))) { + tcp_bbr_partialack(tp); + } else { + bbr_post_recovery(tp); + } + } + if (SEQ_GT(tp->snd_una, tp->snd_recover)) { + tp->snd_recover = tp->snd_una; + } + if (SEQ_LT(tp->snd_nxt, tp->snd_max)) { + tp->snd_nxt = tp->snd_max; + } + if (tp->snd_una == tp->snd_max) { + /* Nothing left outstanding */ +nothing_left: + bbr_log_progress_event(bbr, tp, ticks, PROGRESS_CLEAR, __LINE__); + if (sbavail(&tp->t_inpcb->inp_socket->so_snd) == 0) + bbr->rc_tp->t_acktime = 0; + if ((sbused(&so->so_snd) == 0) && + (tp->t_flags & TF_SENTFIN)) { + ourfinisacked = 1; + } + bbr_timer_cancel(bbr, __LINE__, bbr->r_ctl.rc_rcvtime); + if (bbr->rc_in_persist == 0) { + bbr->r_ctl.rc_went_idle_time = bbr->r_ctl.rc_rcvtime; + } + sack_filter_clear(&bbr->r_ctl.bbr_sf, tp->snd_una); + bbr_log_ack_clear(bbr, bbr->r_ctl.rc_rcvtime); + /* + * We invalidate the last ack here since we + * don't want to transfer forward the time + * for our sum's calculations. + */ + if ((tp->t_state >= TCPS_FIN_WAIT_1) && + (sbavail(&so->so_snd) == 0) && + (tp->t_flags2 & TF2_DROP_AF_DATA)) { + /* + * The socket was gone and the peer sent data, time + * to reset him. + */ + *ret_val = 1; + tp = tcp_close(tp); + ctf_do_dropwithreset(m, tp, th, BANDLIM_UNLIMITED, tlen); + BBR_STAT_INC(bbr_dropped_af_data); + return (1); + } + /* Set need output so persist might get set */ + bbr->r_wanted_output = 1; + } + if (ofia) + *ofia = ourfinisacked; + return (0); +} + +static void +bbr_enter_persist(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts, int32_t line) +{ + if (bbr->rc_in_persist == 0) { + bbr_timer_cancel(bbr, __LINE__, cts); + bbr->r_ctl.rc_last_delay_val = 0; + tp->t_rxtshift = 0; + bbr->rc_in_persist = 1; + bbr->r_ctl.rc_went_idle_time = cts; + /* We should be capped when rw went to 0 but just in case */ + bbr_log_type_pesist(bbr, cts, 0, line, 1); + /* Time freezes for the state, so do the accounting now */ + if (SEQ_GT(cts, bbr->r_ctl.rc_bbr_state_time)) { + uint32_t time_in; + + time_in = cts - bbr->r_ctl.rc_bbr_state_time; + if (bbr->rc_bbr_state == BBR_STATE_PROBE_BW) { + int32_t idx; + + idx = bbr_state_val(bbr); + counter_u64_add(bbr_state_time[(idx + 5)], time_in); + } else { + counter_u64_add(bbr_state_time[bbr->rc_bbr_state], time_in); + } + } + bbr->r_ctl.rc_bbr_state_time = cts; + } +} + +static void +bbr_restart_after_idle(struct tcp_bbr *bbr, uint32_t cts, uint32_t idle_time) +{ + /* + * Note that if idle time does not exceed our + * threshold, we do nothing continuing the state + * transitions we were last walking through. + */ + if (idle_time >= bbr_idle_restart_threshold) { + if (bbr->rc_use_idle_restart) { + bbr->rc_bbr_state = BBR_STATE_IDLE_EXIT; + /* + * Set our target using BBR_UNIT, so + * we increase at a dramatic rate but + * we stop when we get the pipe + * full again for our current b/w estimate. + */ + bbr->r_ctl.rc_bbr_hptsi_gain = BBR_UNIT; + bbr->r_ctl.rc_bbr_cwnd_gain = BBR_UNIT; + bbr_set_state_target(bbr, __LINE__); + /* Now setup our gains to ramp up */ + bbr->r_ctl.rc_bbr_hptsi_gain = bbr->r_ctl.rc_startup_pg; + bbr->r_ctl.rc_bbr_cwnd_gain = bbr->r_ctl.rc_startup_pg; + bbr_log_type_statechange(bbr, cts, __LINE__); + } else { + bbr_substate_change(bbr, cts, __LINE__, 1); + } + } +} + +static void +bbr_exit_persist(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts, int32_t line) +{ + uint32_t idle_time; + + if (bbr->rc_in_persist == 0) + return; + idle_time = bbr_calc_time(cts, bbr->r_ctl.rc_went_idle_time); + bbr->rc_in_persist = 0; + bbr->rc_hit_state_1 = 0; + tp->t_flags &= ~TF_FORCEDATA; + bbr->r_ctl.rc_del_time = cts; + /* + * We invalidate the last ack here since we + * don't want to transfer forward the time + * for our sum's calculations. + */ + if (bbr->rc_inp->inp_in_hpts) { + tcp_hpts_remove(bbr->rc_inp, HPTS_REMOVE_OUTPUT); + bbr->rc_timer_first = 0; + bbr->r_ctl.rc_hpts_flags = 0; + bbr->r_ctl.rc_last_delay_val = 0; + bbr->r_ctl.rc_hptsi_agg_delay = 0; + bbr->r_agg_early_set = 0; + bbr->r_ctl.rc_agg_early = 0; + } + bbr_log_type_pesist(bbr, cts, idle_time, line, 0); + if (idle_time >= bbr_rtt_probe_time) { + /* + * This qualifies as a RTT_PROBE session since we drop the + * data outstanding to nothing and waited more than + * bbr_rtt_probe_time. + */ + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_PERSIST, 0); + bbr->r_ctl.last_in_probertt = bbr->r_ctl.rc_rtt_shrinks = cts; + } + tp->t_rxtshift = 0; + /* + * If in probeBW and we have persisted more than an RTT lets do + * special handling. + */ + /* Force a time based epoch */ + bbr_set_epoch(bbr, cts, __LINE__); + /* + * Setup the lost so we don't count anything against the guy + * we have been stuck with during persists. + */ + bbr->r_ctl.bbr_lost_at_state = bbr->r_ctl.rc_lost; + /* Time un-freezes for the state */ + bbr->r_ctl.rc_bbr_state_time = cts; + if ((bbr->rc_bbr_state == BBR_STATE_PROBE_BW) || + (bbr->rc_bbr_state == BBR_STATE_PROBE_RTT)) { + /* + * If we are going back to probe-bw + * or probe_rtt, we may need to possibly + * do a fast restart. + */ + bbr_restart_after_idle(bbr, cts, idle_time); + } +} + +static void +bbr_collapsed_window(struct tcp_bbr *bbr) +{ + /* + * Now we must walk the + * send map and divide the + * ones left stranded. These + * guys can't cause us to abort + * the connection and are really + * "unsent". However if a buggy + * client actually did keep some + * of the data i.e. collapsed the win + * and refused to ack and then opened + * the win and acked that data. We would + * get into an ack war, the simplier + * method then of just pretending we + * did not send those segments something + * won't work. + */ + struct bbr_sendmap *rsm, *nrsm; + tcp_seq max_seq; + uint32_t maxseg; + int can_split = 0; + int fnd = 0; + + maxseg = bbr->rc_tp->t_maxseg - bbr->rc_last_options; + max_seq = bbr->rc_tp->snd_una + bbr->rc_tp->snd_wnd; + bbr_log_type_rwnd_collapse(bbr, max_seq, 1, 0); + TAILQ_FOREACH(rsm, &bbr->r_ctl.rc_map, r_next) { + /* Find the first seq past or at maxseq */ + if (rsm->r_flags & BBR_RWND_COLLAPSED) + rsm->r_flags &= ~BBR_RWND_COLLAPSED; + if (SEQ_GEQ(max_seq, rsm->r_start) && + SEQ_GEQ(rsm->r_end, max_seq)) { + fnd = 1; + break; + } + } + bbr->rc_has_collapsed = 0; + if (!fnd) { + /* Nothing to do strange */ + return; + } + /* + * Now can we split? + * + * We don't want to split if splitting + * would generate too many small segments + * less we let an attacker fragment our + * send_map and leave us out of memory. + */ + if ((max_seq != rsm->r_start) && + (max_seq != rsm->r_end)){ + /* can we split? */ + int res1, res2; + + res1 = max_seq - rsm->r_start; + res2 = rsm->r_end - max_seq; + if ((res1 >= (maxseg/8)) && + (res2 >= (maxseg/8))) { + /* No small pieces here */ + can_split = 1; + } else if (bbr->r_ctl.rc_num_small_maps_alloced < bbr_sack_block_limit) { + /* We are under the limit */ + can_split = 1; + } + } + /* Ok do we need to split this rsm? */ + if (max_seq == rsm->r_start) { + /* It's this guy no split required */ + nrsm = rsm; + } else if (max_seq == rsm->r_end) { + /* It's the next one no split required. */ + nrsm = TAILQ_NEXT(rsm, r_next); + if (nrsm == NULL) { + /* Huh? */ + return; + } + } else if (can_split && SEQ_LT(max_seq, rsm->r_end)) { + /* yep we need to split it */ + nrsm = bbr_alloc_limit(bbr, BBR_LIMIT_TYPE_SPLIT); + if (nrsm == NULL) { + /* failed XXXrrs what can we do mark the whole? */ + nrsm = rsm; + goto no_split; + } + /* Clone it */ + bbr_log_type_rwnd_collapse(bbr, max_seq, 3, 0); + bbr_clone_rsm(bbr, nrsm, rsm, max_seq); + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_map, rsm, nrsm, r_next); + if (rsm->r_in_tmap) { + TAILQ_INSERT_AFTER(&bbr->r_ctl.rc_tmap, rsm, nrsm, r_tnext); + nrsm->r_in_tmap = 1; + } + } else { + /* + * Split not allowed just start here just + * use this guy. + */ + nrsm = rsm; + } +no_split: + BBR_STAT_INC(bbr_collapsed_win); + /* reuse fnd as a count */ + fnd = 0; + TAILQ_FOREACH_FROM(nrsm, &bbr->r_ctl.rc_map, r_next) { + nrsm->r_flags |= BBR_RWND_COLLAPSED; + fnd++; + bbr->rc_has_collapsed = 1; + } + bbr_log_type_rwnd_collapse(bbr, max_seq, 4, fnd); +} + +static void +bbr_un_collapse_window(struct tcp_bbr *bbr) +{ + struct bbr_sendmap *rsm; + int cleared = 0; + + TAILQ_FOREACH_REVERSE(rsm, &bbr->r_ctl.rc_map, bbr_head, r_next) { + if (rsm->r_flags & BBR_RWND_COLLAPSED) { + /* Clear the flag */ + rsm->r_flags &= ~BBR_RWND_COLLAPSED; + cleared++; + } else + break; + } + bbr_log_type_rwnd_collapse(bbr, + (bbr->rc_tp->snd_una + bbr->rc_tp->snd_wnd), 0, cleared); + bbr->rc_has_collapsed = 0; +} + +/* + * Return value of 1, the TCB is unlocked and most + * likely gone, return value of 0, the TCB is still + * locked. + */ +static int +bbr_process_data(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) +{ + /* + * Update window information. Don't look at window if no ACK: TAC's + * send garbage on first SYN. + */ + uint16_t nsegs; + int32_t tfo_syn; + struct tcp_bbr *bbr; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + INP_WLOCK_ASSERT(tp->t_inpcb); + nsegs = max(1, m->m_pkthdr.lro_nsegs); + if ((thflags & TH_ACK) && + (SEQ_LT(tp->snd_wl1, th->th_seq) || + (tp->snd_wl1 == th->th_seq && (SEQ_LT(tp->snd_wl2, th->th_ack) || + (tp->snd_wl2 == th->th_ack && tiwin > tp->snd_wnd))))) { + /* keep track of pure window updates */ + if (tlen == 0 && + tp->snd_wl2 == th->th_ack && tiwin > tp->snd_wnd) + TCPSTAT_INC(tcps_rcvwinupd); + tp->snd_wnd = tiwin; + tp->snd_wl1 = th->th_seq; + tp->snd_wl2 = th->th_ack; + if (tp->snd_wnd > tp->max_sndwnd) + tp->max_sndwnd = tp->snd_wnd; + bbr->r_wanted_output = 1; + } else if (thflags & TH_ACK) { + if ((tp->snd_wl2 == th->th_ack) && (tiwin < tp->snd_wnd)) { + tp->snd_wnd = tiwin; + tp->snd_wl1 = th->th_seq; + tp->snd_wl2 = th->th_ack; + } + } + if (tp->snd_wnd < ctf_outstanding(tp)) + /* The peer collapsed its window on us */ + bbr_collapsed_window(bbr); + else if (bbr->rc_has_collapsed) + bbr_un_collapse_window(bbr); + /* Was persist timer active and now we have window space? */ + if ((bbr->rc_in_persist != 0) && + (tp->snd_wnd >= min((bbr->r_ctl.rc_high_rwnd/2), + bbr_minseg(bbr)))) { + /* + * Make the rate persist at end of persist mode if idle long + * enough + */ + bbr_exit_persist(tp, bbr, bbr->r_ctl.rc_rcvtime, __LINE__); + + /* Make sure we output to start the timer */ + bbr->r_wanted_output = 1; + } + /* Do we need to enter persist? */ + if ((bbr->rc_in_persist == 0) && + (tp->snd_wnd < min((bbr->r_ctl.rc_high_rwnd/2), bbr_minseg(bbr))) && + TCPS_HAVEESTABLISHED(tp->t_state) && + (tp->snd_max == tp->snd_una) && + sbavail(&tp->t_inpcb->inp_socket->so_snd) && + (sbavail(&tp->t_inpcb->inp_socket->so_snd) > tp->snd_wnd)) { + /* No send window.. we must enter persist */ + bbr_enter_persist(tp, bbr, bbr->r_ctl.rc_rcvtime, __LINE__); + } + if (tp->t_flags2 & TF2_DROP_AF_DATA) { + m_freem(m); + return (0); + } + /* + * Process segments with URG. + */ + if ((thflags & TH_URG) && th->th_urp && + TCPS_HAVERCVDFIN(tp->t_state) == 0) { + /* + * This is a kludge, but if we receive and accept random + * urgent pointers, we'll crash in soreceive. It's hard to + * imagine someone actually wanting to send this much urgent + * data. + */ + SOCKBUF_LOCK(&so->so_rcv); + if (th->th_urp + sbavail(&so->so_rcv) > sb_max) { + th->th_urp = 0; /* XXX */ + thflags &= ~TH_URG; /* XXX */ + SOCKBUF_UNLOCK(&so->so_rcv); /* XXX */ + goto dodata; /* XXX */ + } + /* + * If this segment advances the known urgent pointer, then + * mark the data stream. This should not happen in + * CLOSE_WAIT, CLOSING, LAST_ACK or TIME_WAIT STATES since a + * FIN has been received from the remote side. In these + * states we ignore the URG. + * + * According to RFC961 (Assigned Protocols), the urgent + * pointer points to the last octet of urgent data. We + * continue, however, to consider it to indicate the first + * octet of data past the urgent section as the original + * spec states (in one of two places). + */ + if (SEQ_GT(th->th_seq + th->th_urp, tp->rcv_up)) { + tp->rcv_up = th->th_seq + th->th_urp; + so->so_oobmark = sbavail(&so->so_rcv) + + (tp->rcv_up - tp->rcv_nxt) - 1; + if (so->so_oobmark == 0) + so->so_rcv.sb_state |= SBS_RCVATMARK; + sohasoutofband(so); + tp->t_oobflags &= ~(TCPOOB_HAVEDATA | TCPOOB_HADDATA); + } + SOCKBUF_UNLOCK(&so->so_rcv); + /* + * Remove out of band data so doesn't get presented to user. + * This can happen independent of advancing the URG pointer, + * but if two URG's are pending at once, some out-of-band + * data may creep in... ick. + */ + if (th->th_urp <= (uint32_t)tlen && + !(so->so_options & SO_OOBINLINE)) { + /* hdr drop is delayed */ + tcp_pulloutofband(so, th, m, drop_hdrlen); + } + } else { + /* + * If no out of band data is expected, pull receive urgent + * pointer along with the receive window. + */ + if (SEQ_GT(tp->rcv_nxt, tp->rcv_up)) + tp->rcv_up = tp->rcv_nxt; + } +dodata: /* XXX */ + INP_WLOCK_ASSERT(tp->t_inpcb); + + /* + * Process the segment text, merging it into the TCP sequencing + * queue, and arranging for acknowledgment of receipt if necessary. + * This process logically involves adjusting tp->rcv_wnd as data is + * presented to the user (this happens in tcp_usrreq.c, case + * PRU_RCVD). If a FIN has already been received on this connection + * then we just ignore the text. + */ + tfo_syn = ((tp->t_state == TCPS_SYN_RECEIVED) && + IS_FASTOPEN(tp->t_flags)); + if ((tlen || (thflags & TH_FIN) || tfo_syn) && + TCPS_HAVERCVDFIN(tp->t_state) == 0) { + tcp_seq save_start = th->th_seq; + tcp_seq save_rnxt = tp->rcv_nxt; + int save_tlen = tlen; + + m_adj(m, drop_hdrlen); /* delayed header drop */ + /* + * Insert segment which includes th into TCP reassembly + * queue with control block tp. Set thflags to whether + * reassembly now includes a segment with FIN. This handles + * the common case inline (segment is the next to be + * received on an established connection, and the queue is + * empty), avoiding linkage into and removal from the queue + * and repetition of various conversions. Set DELACK for + * segments received in order, but ack immediately when + * segments are out of order (so fast retransmit can work). + */ + if (th->th_seq == tp->rcv_nxt && + SEGQ_EMPTY(tp) && + (TCPS_HAVEESTABLISHED(tp->t_state) || + tfo_syn)) { +#ifdef NETFLIX_SB_LIMITS + u_int mcnt, appended; + + if (so->so_rcv.sb_shlim) { + mcnt = m_memcnt(m); + appended = 0; + if (counter_fo_get(so->so_rcv.sb_shlim, mcnt, + CFO_NOSLEEP, NULL) == false) { + counter_u64_add(tcp_sb_shlim_fails, 1); + m_freem(m); + return (0); + } + } +#endif + if (DELAY_ACK(tp, bbr, nsegs) || tfo_syn) { + bbr->bbr_segs_rcvd += max(1, nsegs); + tp->t_flags |= TF_DELACK; + bbr_timer_cancel(bbr, __LINE__, bbr->r_ctl.rc_rcvtime); + } else { + bbr->r_wanted_output = 1; + tp->t_flags |= TF_ACKNOW; + } + tp->rcv_nxt += tlen; + thflags = th->th_flags & TH_FIN; + TCPSTAT_ADD(tcps_rcvpack, (int)nsegs); + TCPSTAT_ADD(tcps_rcvbyte, tlen); + SOCKBUF_LOCK(&so->so_rcv); + if (so->so_rcv.sb_state & SBS_CANTRCVMORE) + m_freem(m); + else +#ifdef NETFLIX_SB_LIMITS + appended = +#endif + sbappendstream_locked(&so->so_rcv, m, 0); + /* NB: sorwakeup_locked() does an implicit unlock. */ + sorwakeup_locked(so); +#ifdef NETFLIX_SB_LIMITS + if (so->so_rcv.sb_shlim && appended != mcnt) + counter_fo_release(so->so_rcv.sb_shlim, + mcnt - appended); +#endif + } else { + /* + * XXX: Due to the header drop above "th" is + * theoretically invalid by now. Fortunately + * m_adj() doesn't actually frees any mbufs when + * trimming from the head. + */ + tcp_seq temp = save_start; + thflags = tcp_reass(tp, th, &temp, &tlen, m); + tp->t_flags |= TF_ACKNOW; + } + if ((tp->t_flags & TF_SACK_PERMIT) && (save_tlen > 0)) { + if ((tlen == 0) && (SEQ_LT(save_start, save_rnxt))) { + /* + * DSACK actually handled in the fastpath + * above. + */ + tcp_update_sack_list(tp, save_start, + save_start + save_tlen); + } else if ((tlen > 0) && SEQ_GT(tp->rcv_nxt, save_rnxt)) { + if ((tp->rcv_numsacks >= 1) && + (tp->sackblks[0].end == save_start)) { + /* + * Partial overlap, recorded at todrop + * above. + */ + tcp_update_sack_list(tp, + tp->sackblks[0].start, + tp->sackblks[0].end); + } else { + tcp_update_dsack_list(tp, save_start, + save_start + save_tlen); + } + } else if (tlen >= save_tlen) { + /* Update of sackblks. */ + tcp_update_dsack_list(tp, save_start, + save_start + save_tlen); + } else if (tlen > 0) { + tcp_update_dsack_list(tp, save_start, + save_start + tlen); + } + } + } else { + m_freem(m); + thflags &= ~TH_FIN; + } + + /* + * If FIN is received ACK the FIN and let the user know that the + * connection is closing. + */ + if (thflags & TH_FIN) { + if (TCPS_HAVERCVDFIN(tp->t_state) == 0) { + socantrcvmore(so); + /* + * If connection is half-synchronized (ie NEEDSYN + * flag on) then delay ACK, so it may be piggybacked + * when SYN is sent. Otherwise, since we received a + * FIN then no more input can be expected, send ACK + * now. + */ + if (tp->t_flags & TF_NEEDSYN) { + tp->t_flags |= TF_DELACK; + bbr_timer_cancel(bbr, + __LINE__, bbr->r_ctl.rc_rcvtime); + } else { + tp->t_flags |= TF_ACKNOW; + } + tp->rcv_nxt++; + } + switch (tp->t_state) { + + /* + * In SYN_RECEIVED and ESTABLISHED STATES enter the + * CLOSE_WAIT state. + */ + case TCPS_SYN_RECEIVED: + tp->t_starttime = ticks; + /* FALLTHROUGH */ + case TCPS_ESTABLISHED: + tcp_state_change(tp, TCPS_CLOSE_WAIT); + break; + + /* + * If still in FIN_WAIT_1 STATE FIN has not been + * acked so enter the CLOSING state. + */ + case TCPS_FIN_WAIT_1: + tcp_state_change(tp, TCPS_CLOSING); + break; + + /* + * In FIN_WAIT_2 state enter the TIME_WAIT state, + * starting the time-wait timer, turning off the + * other standard timers. + */ + case TCPS_FIN_WAIT_2: + bbr->rc_timer_first = 1; + bbr_timer_cancel(bbr, + __LINE__, bbr->r_ctl.rc_rcvtime); + INP_INFO_RLOCK_ASSERT(&V_tcbinfo); + INP_WLOCK_ASSERT(tp->t_inpcb); + tcp_twstart(tp); + return (1); + } + } + /* + * Return any desired output. + */ + if ((tp->t_flags & TF_ACKNOW) || + (sbavail(&so->so_snd) > ctf_outstanding(tp))) { + bbr->r_wanted_output = 1; + } + INP_WLOCK_ASSERT(tp->t_inpcb); + return (0); +} + +/* + * Here nothing is really faster, its just that we + * have broken out the fast-data path also just like + * the fast-ack. Return 1 if we processed the packet + * return 0 if you need to take the "slow-path". + */ +static int +bbr_do_fastnewdata(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t nxt_pkt) +{ + uint16_t nsegs; + int32_t newsize = 0; /* automatic sockbuf scaling */ + struct tcp_bbr *bbr; +#ifdef NETFLIX_SB_LIMITS + u_int mcnt, appended; +#endif +#ifdef TCPDEBUG + /* + * The size of tcp_saveipgen must be the size of the max ip header, + * now IPv6. + */ + u_char tcp_saveipgen[IP6_HDR_LEN]; + struct tcphdr tcp_savetcp; + short ostate = 0; + +#endif + /* On the hpts and we would have called output */ + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + + /* + * If last ACK falls within this segment's sequence numbers, record + * the timestamp. NOTE that the test is modified according to the + * latest proposal of the tcplw@cray.com list (Braden 1993/04/26). + */ + if (bbr->r_ctl.rc_resend != NULL) { + return (0); + } + if (tiwin && tiwin != tp->snd_wnd) { + return (0); + } + if (__predict_false((tp->t_flags & (TF_NEEDSYN | TF_NEEDFIN)))) { + return (0); + } + if (__predict_false((to->to_flags & TOF_TS) && + (TSTMP_LT(to->to_tsval, tp->ts_recent)))) { + return (0); + } + if (__predict_false((th->th_ack != tp->snd_una))) { + return (0); + } + if (__predict_false(tlen > sbspace(&so->so_rcv))) { + return (0); + } + if ((to->to_flags & TOF_TS) != 0 && + SEQ_LEQ(th->th_seq, tp->last_ack_sent)) { + tp->ts_recent_age = tcp_tv_to_mssectick(&bbr->rc_tv); + tp->ts_recent = to->to_tsval; + } + /* + * This is a pure, in-sequence data packet with nothing on the + * reassembly queue and we have enough buffer space to take it. + */ + nsegs = max(1, m->m_pkthdr.lro_nsegs); +#ifdef NETFLIX_SB_LIMITS + if (so->so_rcv.sb_shlim) { + mcnt = m_memcnt(m); + appended = 0; + if (counter_fo_get(so->so_rcv.sb_shlim, mcnt, + CFO_NOSLEEP, NULL) == false) { + counter_u64_add(tcp_sb_shlim_fails, 1); + m_freem(m); + return (1); + } + } +#endif + /* Clean receiver SACK report if present */ + if (tp->rcv_numsacks) + tcp_clean_sackreport(tp); + TCPSTAT_INC(tcps_preddat); + tp->rcv_nxt += tlen; + /* + * Pull snd_wl1 up to prevent seq wrap relative to th_seq. + */ + tp->snd_wl1 = th->th_seq; + /* + * Pull rcv_up up to prevent seq wrap relative to rcv_nxt. + */ + tp->rcv_up = tp->rcv_nxt; + TCPSTAT_ADD(tcps_rcvpack, (int)nsegs); + TCPSTAT_ADD(tcps_rcvbyte, tlen); +#ifdef TCPDEBUG + if (so->so_options & SO_DEBUG) + tcp_trace(TA_INPUT, ostate, tp, + (void *)tcp_saveipgen, &tcp_savetcp, 0); +#endif + newsize = tcp_autorcvbuf(m, th, so, tp, tlen); + + /* Add data to socket buffer. */ + SOCKBUF_LOCK(&so->so_rcv); + if (so->so_rcv.sb_state & SBS_CANTRCVMORE) { + m_freem(m); + } else { + /* + * Set new socket buffer size. Give up when limit is + * reached. + */ + if (newsize) + if (!sbreserve_locked(&so->so_rcv, + newsize, so, NULL)) + so->so_rcv.sb_flags &= ~SB_AUTOSIZE; + m_adj(m, drop_hdrlen); /* delayed header drop */ +#ifdef NETFLIX_SB_LIMITS + appended = +#endif + sbappendstream_locked(&so->so_rcv, m, 0); + ctf_calc_rwin(so, tp); + } + /* NB: sorwakeup_locked() does an implicit unlock. */ + sorwakeup_locked(so); +#ifdef NETFLIX_SB_LIMITS + if (so->so_rcv.sb_shlim && mcnt != appended) + counter_fo_release(so->so_rcv.sb_shlim, mcnt - appended); +#endif + if (DELAY_ACK(tp, bbr, nsegs)) { + bbr->bbr_segs_rcvd += max(1, nsegs); + tp->t_flags |= TF_DELACK; + bbr_timer_cancel(bbr, __LINE__, bbr->r_ctl.rc_rcvtime); + } else { + bbr->r_wanted_output = 1; + tp->t_flags |= TF_ACKNOW; + } + return (1); +} + +/* + * This subfunction is used to try to highly optimize the + * fast path. We again allow window updates that are + * in sequence to remain in the fast-path. We also add + * in the __predict's to attempt to help the compiler. + * Note that if we return a 0, then we can *not* process + * it and the caller should push the packet into the + * slow-path. If we return 1, then all is well and + * the packet is fully processed. + */ +static int +bbr_fastack(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t nxt_pkt) +{ + int32_t acked; + uint16_t nsegs; + uint32_t sack_changed; +#ifdef TCPDEBUG + /* + * The size of tcp_saveipgen must be the size of the max ip header, + * now IPv6. + */ + u_char tcp_saveipgen[IP6_HDR_LEN]; + struct tcphdr tcp_savetcp; + short ostate = 0; + +#endif + uint32_t prev_acked = 0; + struct tcp_bbr *bbr; + + if (__predict_false(SEQ_LEQ(th->th_ack, tp->snd_una))) { + /* Old ack, behind (or duplicate to) the last one rcv'd */ + return (0); + } + if (__predict_false(SEQ_GT(th->th_ack, tp->snd_max))) { + /* Above what we have sent? */ + return (0); + } + if (__predict_false(tiwin == 0)) { + /* zero window */ + return (0); + } + if (__predict_false(tp->t_flags & (TF_NEEDSYN | TF_NEEDFIN))) { + /* We need a SYN or a FIN, unlikely.. */ + return (0); + } + if ((to->to_flags & TOF_TS) && __predict_false(TSTMP_LT(to->to_tsval, tp->ts_recent))) { + /* Timestamp is behind .. old ack with seq wrap? */ + return (0); + } + if (__predict_false(IN_RECOVERY(tp->t_flags))) { + /* Still recovering */ + return (0); + } + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + if (__predict_false(bbr->r_ctl.rc_resend != NULL)) { + /* We are retransmitting */ + return (0); + } + if (__predict_false(bbr->rc_in_persist != 0)) { + /* In persist mode */ + return (0); + } + if (bbr->r_ctl.rc_sacked) { + /* We have sack holes on our scoreboard */ + return (0); + } + /* Ok if we reach here, we can process a fast-ack */ + nsegs = max(1, m->m_pkthdr.lro_nsegs); + sack_changed = bbr_log_ack(tp, to, th, &prev_acked); + /* + * We never detect loss in fast ack [we can't + * have a sack and can't be in recovery so + * we always pass 0 (nothing detected)]. + */ + bbr_lt_bw_sampling(bbr, bbr->r_ctl.rc_rcvtime, 0); + /* Did the window get updated? */ + if (tiwin != tp->snd_wnd) { + tp->snd_wnd = tiwin; + tp->snd_wl1 = th->th_seq; + if (tp->snd_wnd > tp->max_sndwnd) + tp->max_sndwnd = tp->snd_wnd; + } + /* Do we need to exit persists? */ + if ((bbr->rc_in_persist != 0) && + (tp->snd_wnd >= min((bbr->r_ctl.rc_high_rwnd/2), + bbr_minseg(bbr)))) { + bbr_exit_persist(tp, bbr, bbr->r_ctl.rc_rcvtime, __LINE__); + bbr->r_wanted_output = 1; + } + /* Do we need to enter persists? */ + if ((bbr->rc_in_persist == 0) && + (tp->snd_wnd < min((bbr->r_ctl.rc_high_rwnd/2), bbr_minseg(bbr))) && + TCPS_HAVEESTABLISHED(tp->t_state) && + (tp->snd_max == tp->snd_una) && + sbavail(&tp->t_inpcb->inp_socket->so_snd) && + (sbavail(&tp->t_inpcb->inp_socket->so_snd) > tp->snd_wnd)) { + /* No send window.. we must enter persist */ + bbr_enter_persist(tp, bbr, bbr->r_ctl.rc_rcvtime, __LINE__); + } + /* + * If last ACK falls within this segment's sequence numbers, record + * the timestamp. NOTE that the test is modified according to the + * latest proposal of the tcplw@cray.com list (Braden 1993/04/26). + */ + if ((to->to_flags & TOF_TS) != 0 && + SEQ_LEQ(th->th_seq, tp->last_ack_sent)) { + tp->ts_recent_age = bbr->r_ctl.rc_rcvtime; + tp->ts_recent = to->to_tsval; + } + /* + * This is a pure ack for outstanding data. + */ + TCPSTAT_INC(tcps_predack); + + /* + * "bad retransmit" recovery. + */ + if (tp->t_flags & TF_PREVVALID) { + tp->t_flags &= ~TF_PREVVALID; + if (tp->t_rxtshift == 1 && + (int)(ticks - tp->t_badrxtwin) < 0) + bbr_cong_signal(tp, th, CC_RTO_ERR, NULL); + } + /* + * Recalculate the transmit timer / rtt. + * + * Some boxes send broken timestamp replies during the SYN+ACK + * phase, ignore timestamps of 0 or we could calculate a huge RTT + * and blow up the retransmit timer. + */ + acked = BYTES_THIS_ACK(tp, th); + +#ifdef TCP_HHOOK + /* Run HHOOK_TCP_ESTABLISHED_IN helper hooks. */ + hhook_run_tcp_est_in(tp, th, to); +#endif + + TCPSTAT_ADD(tcps_rcvackpack, (int)nsegs); + TCPSTAT_ADD(tcps_rcvackbyte, acked); + sbdrop(&so->so_snd, acked); + + if (SEQ_GT(th->th_ack, tp->snd_una)) + bbr_collapse_rtt(tp, bbr, TCP_REXMTVAL(tp)); + tp->snd_una = th->th_ack; + if (tp->snd_wnd < ctf_outstanding(tp)) + /* The peer collapsed its window on us */ + bbr_collapsed_window(bbr); + else if (bbr->rc_has_collapsed) + bbr_un_collapse_window(bbr); + + if (SEQ_GT(tp->snd_una, tp->snd_recover)) { + tp->snd_recover = tp->snd_una; + } + bbr_ack_received(tp, bbr, th, acked, sack_changed, prev_acked, __LINE__, 0); + /* + * Pull snd_wl2 up to prevent seq wrap relative to th_ack. + */ + tp->snd_wl2 = th->th_ack; + m_freem(m); + /* + * If all outstanding data are acked, stop retransmit timer, + * otherwise restart timer using current (possibly backed-off) + * value. If process is waiting for space, wakeup/selwakeup/signal. + * If data are ready to send, let tcp_output decide between more + * output or persist. + */ +#ifdef TCPDEBUG + if (so->so_options & SO_DEBUG) + tcp_trace(TA_INPUT, ostate, tp, + (void *)tcp_saveipgen, + &tcp_savetcp, 0); +#endif + /* Wake up the socket if we have room to write more */ + sowwakeup(so); + if (tp->snd_una == tp->snd_max) { + /* Nothing left outstanding */ + bbr_log_progress_event(bbr, tp, ticks, PROGRESS_CLEAR, __LINE__); + if (sbavail(&tp->t_inpcb->inp_socket->so_snd) == 0) + bbr->rc_tp->t_acktime = 0; + bbr_timer_cancel(bbr, __LINE__, bbr->r_ctl.rc_rcvtime); + if (bbr->rc_in_persist == 0) { + bbr->r_ctl.rc_went_idle_time = bbr->r_ctl.rc_rcvtime; + } + sack_filter_clear(&bbr->r_ctl.bbr_sf, tp->snd_una); + bbr_log_ack_clear(bbr, bbr->r_ctl.rc_rcvtime); + /* + * We invalidate the last ack here since we + * don't want to transfer forward the time + * for our sum's calculations. + */ + bbr->r_wanted_output = 1; + } + if (sbavail(&so->so_snd)) { + bbr->r_wanted_output = 1; + } + return (1); +} + +/* + * Return value of 1, the TCB is unlocked and most + * likely gone, return value of 0, the TCB is still + * locked. + */ +static int +bbr_do_syn_sent(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) +{ + int32_t todrop; + int32_t ourfinisacked = 0; + struct tcp_bbr *bbr; + int32_t ret_val = 0; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + ctf_calc_rwin(so, tp); + /* + * If the state is SYN_SENT: if seg contains an ACK, but not for our + * SYN, drop the input. if seg contains a RST, then drop the + * connection. if seg does not contain SYN, then drop it. Otherwise + * this is an acceptable SYN segment initialize tp->rcv_nxt and + * tp->irs if seg contains ack then advance tp->snd_una. BRR does + * not support ECN so we will not say we are capable. if SYN has + * been acked change to ESTABLISHED else SYN_RCVD state arrange for + * segment to be acked (eventually) continue processing rest of + * data/controls, beginning with URG + */ + if ((thflags & TH_ACK) && + (SEQ_LEQ(th->th_ack, tp->iss) || + SEQ_GT(th->th_ack, tp->snd_max))) { + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } + if ((thflags & (TH_ACK | TH_RST)) == (TH_ACK | TH_RST)) { + TCP_PROBE5(connect__refused, NULL, tp, + mtod(m, const char *), tp, th); + tp = tcp_drop(tp, ECONNREFUSED); + ctf_do_drop(m, tp); + return (1); + } + if (thflags & TH_RST) { + ctf_do_drop(m, tp); + return (1); + } + if (!(thflags & TH_SYN)) { + ctf_do_drop(m, tp); + return (1); + } + tp->irs = th->th_seq; + tcp_rcvseqinit(tp); + if (thflags & TH_ACK) { + int tfo_partial = 0; + + TCPSTAT_INC(tcps_connects); + soisconnected(so); +#ifdef MAC + mac_socketpeer_set_from_mbuf(m, so); +#endif + /* Do window scaling on this connection? */ + if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) == + (TF_RCVD_SCALE | TF_REQ_SCALE)) { + tp->rcv_scale = tp->request_r_scale; + } + tp->rcv_adv += min(tp->rcv_wnd, + TCP_MAXWIN << tp->rcv_scale); + /* + * If not all the data that was sent in the TFO SYN + * has been acked, resend the remainder right away. + */ + if (IS_FASTOPEN(tp->t_flags) && + (tp->snd_una != tp->snd_max)) { + tp->snd_nxt = th->th_ack; + tfo_partial = 1; + } + /* + * If there's data, delay ACK; if there's also a FIN ACKNOW + * will be turned on later. + */ + if (DELAY_ACK(tp, bbr, 1) && tlen != 0 && (tfo_partial == 0)) { + bbr->bbr_segs_rcvd += 1; + tp->t_flags |= TF_DELACK; + bbr_timer_cancel(bbr, __LINE__, bbr->r_ctl.rc_rcvtime); + } else { + bbr->r_wanted_output = 1; + tp->t_flags |= TF_ACKNOW; + } + if (SEQ_GT(th->th_ack, tp->iss)) { + /* + * The SYN is acked + * handle it specially. + */ + bbr_log_syn(tp, to); + } + if (SEQ_GT(th->th_ack, tp->snd_una)) { + /* + * We advance snd_una for the + * fast open case. If th_ack is + * acknowledging data beyond + * snd_una we can't just call + * ack-processing since the + * data stream in our send-map + * will start at snd_una + 1 (one + * beyond the SYN). If its just + * equal we don't need to do that + * and there is no send_map. + */ + tp->snd_una++; + } + /* + * Received in SYN_SENT[*] state. Transitions: + * SYN_SENT --> ESTABLISHED SYN_SENT* --> FIN_WAIT_1 + */ + tp->t_starttime = ticks; + if (tp->t_flags & TF_NEEDFIN) { + tcp_state_change(tp, TCPS_FIN_WAIT_1); + tp->t_flags &= ~TF_NEEDFIN; + thflags &= ~TH_SYN; + } else { + tcp_state_change(tp, TCPS_ESTABLISHED); + TCP_PROBE5(connect__established, NULL, tp, + mtod(m, const char *), tp, th); + cc_conn_init(tp); + } + } else { + /* + * Received initial SYN in SYN-SENT[*] state => simultaneous + * open. If segment contains CC option and there is a + * cached CC, apply TAO test. If it succeeds, connection is * + * half-synchronized. Otherwise, do 3-way handshake: + * SYN-SENT -> SYN-RECEIVED SYN-SENT* -> SYN-RECEIVED* If + * there was no CC option, clear cached CC value. + */ + tp->t_flags |= (TF_ACKNOW | TF_NEEDSYN); + tcp_state_change(tp, TCPS_SYN_RECEIVED); + } + INP_WLOCK_ASSERT(tp->t_inpcb); + /* + * Advance th->th_seq to correspond to first data byte. If data, + * trim to stay within window, dropping FIN if necessary. + */ + th->th_seq++; + if (tlen > tp->rcv_wnd) { + todrop = tlen - tp->rcv_wnd; + m_adj(m, -todrop); + tlen = tp->rcv_wnd; + thflags &= ~TH_FIN; + TCPSTAT_INC(tcps_rcvpackafterwin); + TCPSTAT_ADD(tcps_rcvbyteafterwin, todrop); + } + tp->snd_wl1 = th->th_seq - 1; + tp->rcv_up = th->th_seq; + /* + * Client side of transaction: already sent SYN and data. If the + * remote host used T/TCP to validate the SYN, our data will be + * ACK'd; if so, enter normal data segment processing in the middle + * of step 5, ack processing. Otherwise, goto step 6. + */ + if (thflags & TH_ACK) { + if ((to->to_flags & TOF_TS) != 0) { + uint32_t t, rtt; + + t = tcp_tv_to_mssectick(&bbr->rc_tv); + if (TSTMP_GEQ(t, to->to_tsecr)) { + rtt = t - to->to_tsecr; + if (rtt == 0) { + rtt = 1; + } + rtt *= MS_IN_USEC; + tcp_bbr_xmit_timer(bbr, rtt, 0, 0, 0); + apply_filter_min_small(&bbr->r_ctl.rc_rttprop, + rtt, bbr->r_ctl.rc_rcvtime); + } + } + if (bbr_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) + return (ret_val); + /* We may have changed to FIN_WAIT_1 above */ + if (tp->t_state == TCPS_FIN_WAIT_1) { + /* + * In FIN_WAIT_1 STATE in addition to the processing + * for the ESTABLISHED state if our FIN is now + * acknowledged then enter FIN_WAIT_2. + */ + if (ourfinisacked) { + /* + * If we can't receive any more data, then + * closing user can proceed. Starting the + * timer is contrary to the specification, + * but if we don't get a FIN we'll hang + * forever. + * + * XXXjl: we should release the tp also, and + * use a compressed state. + */ + if (so->so_rcv.sb_state & SBS_CANTRCVMORE) { + soisdisconnected(so); + tcp_timer_activate(tp, TT_2MSL, + (tcp_fast_finwait2_recycle ? + tcp_finwait2_timeout : + TP_MAXIDLE(tp))); + } + tcp_state_change(tp, TCPS_FIN_WAIT_2); + } + } + } + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); +} + +/* + * Return value of 1, the TCB is unlocked and most + * likely gone, return value of 0, the TCB is still + * locked. + */ +static int +bbr_do_syn_recv(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) +{ + int32_t ourfinisacked = 0; + int32_t ret_val; + struct tcp_bbr *bbr; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + ctf_calc_rwin(so, tp); + if ((thflags & TH_ACK) && + (SEQ_LEQ(th->th_ack, tp->snd_una) || + SEQ_GT(th->th_ack, tp->snd_max))) { + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } + if (IS_FASTOPEN(tp->t_flags)) { + /* + * When a TFO connection is in SYN_RECEIVED, the only valid + * packets are the initial SYN, a retransmit/copy of the + * initial SYN (possibly with a subset of the original + * data), a valid ACK, a FIN, or a RST. + */ + if ((thflags & (TH_SYN | TH_ACK)) == (TH_SYN | TH_ACK)) { + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } else if (thflags & TH_SYN) { + /* non-initial SYN is ignored */ + if ((bbr->r_ctl.rc_hpts_flags & PACE_TMR_RXT) || + (bbr->r_ctl.rc_hpts_flags & PACE_TMR_TLP) || + (bbr->r_ctl.rc_hpts_flags & PACE_TMR_RACK)) { + ctf_do_drop(m, NULL); + return (0); + } + } else if (!(thflags & (TH_ACK | TH_FIN | TH_RST))) { + ctf_do_drop(m, NULL); + return (0); + } + } + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); + /* + * RFC 1323 PAWS: If we have a timestamp reply on this segment and + * it's less than ts_recent, drop it. + */ + if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && + TSTMP_LT(to->to_tsval, tp->ts_recent)) { + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) + return (ret_val); + } + /* + * In the SYN-RECEIVED state, validate that the packet belongs to + * this connection before trimming the data to fit the receive + * window. Check the sequence number versus IRS since we know the + * sequence numbers haven't wrapped. This is a partial fix for the + * "LAND" DoS attack. + */ + if (SEQ_LT(th->th_seq, tp->irs)) { + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } + INP_WLOCK_ASSERT(tp->t_inpcb); + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + return (ret_val); + } + /* + * If last ACK falls within this segment's sequence numbers, record + * its timestamp. NOTE: 1) That the test incorporates suggestions + * from the latest proposal of the tcplw@cray.com list (Braden + * 1993/04/26). 2) That updating only on newer timestamps interferes + * with our earlier PAWS tests, so this check should be solely + * predicated on the sequence space of this segment. 3) That we + * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ + * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + + * SEG.Len, This modified check allows us to overcome RFC1323's + * limitations as described in Stevens TCP/IP Illustrated Vol. 2 + * p.869. In such cases, we can still calculate the RTT correctly + * when RCV.NXT == Last.ACK.Sent. + */ + if ((to->to_flags & TOF_TS) != 0 && + SEQ_LEQ(th->th_seq, tp->last_ack_sent) && + SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + + ((thflags & (TH_SYN | TH_FIN)) != 0))) { + tp->ts_recent_age = tcp_tv_to_mssectick(&bbr->rc_tv); + tp->ts_recent = to->to_tsval; + } + tp->snd_wnd = tiwin; + /* + * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag + * is on (half-synchronized state), then queue data for later + * processing; else drop segment and return. + */ + if ((thflags & TH_ACK) == 0) { + if (IS_FASTOPEN(tp->t_flags)) { + cc_conn_init(tp); + } + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); + } + TCPSTAT_INC(tcps_connects); + soisconnected(so); + /* Do window scaling? */ + if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) == + (TF_RCVD_SCALE | TF_REQ_SCALE)) { + tp->rcv_scale = tp->request_r_scale; + } + /* + * ok for the first time in lets see if we can use the ts to figure + * out what the initial RTT was. + */ + if ((to->to_flags & TOF_TS) != 0) { + uint32_t t, rtt; + + t = tcp_tv_to_mssectick(&bbr->rc_tv); + if (TSTMP_GEQ(t, to->to_tsecr)) { + rtt = t - to->to_tsecr; + if (rtt == 0) { + rtt = 1; + } + rtt *= MS_IN_USEC; + tcp_bbr_xmit_timer(bbr, rtt, 0, 0, 0); + apply_filter_min_small(&bbr->r_ctl.rc_rttprop, rtt, bbr->r_ctl.rc_rcvtime); + } + } + /* Drop off any SYN in the send map (probably not there) */ + if (thflags & TH_ACK) + bbr_log_syn(tp, to); + if (IS_FASTOPEN(tp->t_flags) && tp->t_tfo_pending) { + + tcp_fastopen_decrement_counter(tp->t_tfo_pending); + tp->t_tfo_pending = NULL; + /* + * Account for the ACK of our SYN prior to regular + * ACK processing below. + */ + tp->snd_una++; + } + /* + * Make transitions: SYN-RECEIVED -> ESTABLISHED SYN-RECEIVED* -> + * FIN-WAIT-1 + */ + tp->t_starttime = ticks; + if (tp->t_flags & TF_NEEDFIN) { + tcp_state_change(tp, TCPS_FIN_WAIT_1); + tp->t_flags &= ~TF_NEEDFIN; + } else { + tcp_state_change(tp, TCPS_ESTABLISHED); + TCP_PROBE5(accept__established, NULL, tp, + mtod(m, const char *), tp, th); + /* + * TFO connections call cc_conn_init() during SYN + * processing. Calling it again here for such connections + * is not harmless as it would undo the snd_cwnd reduction + * that occurs when a TFO SYN|ACK is retransmitted. + */ + if (!IS_FASTOPEN(tp->t_flags)) + cc_conn_init(tp); + } + /* + * If segment contains data or ACK, will call tcp_reass() later; if + * not, do so now to pass queued data to user. + */ + if (tlen == 0 && (thflags & TH_FIN) == 0) + (void)tcp_reass(tp, (struct tcphdr *)0, NULL, 0, + (struct mbuf *)0); + tp->snd_wl1 = th->th_seq - 1; + if (bbr_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) { + return (ret_val); + } + if (tp->t_state == TCPS_FIN_WAIT_1) { + /* We could have went to FIN_WAIT_1 (or EST) above */ + /* + * In FIN_WAIT_1 STATE in addition to the processing for the + * ESTABLISHED state if our FIN is now acknowledged then + * enter FIN_WAIT_2. + */ + if (ourfinisacked) { + /* + * If we can't receive any more data, then closing + * user can proceed. Starting the timer is contrary + * to the specification, but if we don't get a FIN + * we'll hang forever. + * + * XXXjl: we should release the tp also, and use a + * compressed state. + */ + if (so->so_rcv.sb_state & SBS_CANTRCVMORE) { + soisdisconnected(so); + tcp_timer_activate(tp, TT_2MSL, + (tcp_fast_finwait2_recycle ? + tcp_finwait2_timeout : + TP_MAXIDLE(tp))); + } + tcp_state_change(tp, TCPS_FIN_WAIT_2); + } + } + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); +} + +/* + * Return value of 1, the TCB is unlocked and most + * likely gone, return value of 0, the TCB is still + * locked. + */ +static int +bbr_do_established(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) +{ + struct tcp_bbr *bbr; + int32_t ret_val; + + /* + * Header prediction: check for the two common cases of a + * uni-directional data xfer. If the packet has no control flags, + * is in-sequence, the window didn't change and we're not + * retransmitting, it's a candidate. If the length is zero and the + * ack moved forward, we're the sender side of the xfer. Just free + * the data acked & wake any higher level process that was blocked + * waiting for space. If the length is non-zero and the ack didn't + * move, we're the receiver side. If we're getting packets in-order + * (the reassembly queue is empty), add the data toc The socket + * buffer and note that we need a delayed ack. Make sure that the + * hidden state-flags are also off. Since we check for + * TCPS_ESTABLISHED first, it can only be TH_NEEDSYN. + */ + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + if (bbr->r_ctl.rc_delivered < (4 * tp->t_maxseg)) { + /* + * If we have delived under 4 segments increase the initial + * window if raised by the peer. We use this to determine + * dynamic and static rwnd's at the end of a connection. + */ + bbr->r_ctl.rc_init_rwnd = max(tiwin, tp->snd_wnd); + } + if (__predict_true(((to->to_flags & TOF_SACK) == 0)) && + __predict_true((thflags & (TH_SYN | TH_FIN | TH_RST | TH_URG | TH_ACK)) == TH_ACK) && + __predict_true(SEGQ_EMPTY(tp)) && + __predict_true(th->th_seq == tp->rcv_nxt)) { + if (tlen == 0) { + if (bbr_fastack(m, th, so, tp, to, drop_hdrlen, tlen, + tiwin, nxt_pkt)) { + return (0); + } + } else { + if (bbr_do_fastnewdata(m, th, so, tp, to, drop_hdrlen, tlen, + tiwin, nxt_pkt)) { + return (0); + } + } + } + ctf_calc_rwin(so, tp); + + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); + /* + * RFC5961 Section 4.2 Send challenge ACK for any SYN in + * synchronized state. + */ + if (thflags & TH_SYN) { + ctf_challenge_ack(m, th, tp, &ret_val); + return (ret_val); + } + /* + * RFC 1323 PAWS: If we have a timestamp reply on this segment and + * it's less than ts_recent, drop it. + */ + if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && + TSTMP_LT(to->to_tsval, tp->ts_recent)) { + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) + return (ret_val); + } + INP_WLOCK_ASSERT(tp->t_inpcb); + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + return (ret_val); + } + /* + * If last ACK falls within this segment's sequence numbers, record + * its timestamp. NOTE: 1) That the test incorporates suggestions + * from the latest proposal of the tcplw@cray.com list (Braden + * 1993/04/26). 2) That updating only on newer timestamps interferes + * with our earlier PAWS tests, so this check should be solely + * predicated on the sequence space of this segment. 3) That we + * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ + * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + + * SEG.Len, This modified check allows us to overcome RFC1323's + * limitations as described in Stevens TCP/IP Illustrated Vol. 2 + * p.869. In such cases, we can still calculate the RTT correctly + * when RCV.NXT == Last.ACK.Sent. + */ + if ((to->to_flags & TOF_TS) != 0 && + SEQ_LEQ(th->th_seq, tp->last_ack_sent) && + SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + + ((thflags & (TH_SYN | TH_FIN)) != 0))) { + tp->ts_recent_age = tcp_tv_to_mssectick(&bbr->rc_tv); + tp->ts_recent = to->to_tsval; + } + /* + * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag + * is on (half-synchronized state), then queue data for later + * processing; else drop segment and return. + */ + if ((thflags & TH_ACK) == 0) { + if (tp->t_flags & TF_NEEDSYN) { + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); + } else if (tp->t_flags & TF_ACKNOW) { + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + bbr->r_wanted_output = 1; + return (ret_val); + } else { + ctf_do_drop(m, NULL); + return (0); + } + } + /* + * Ack processing. + */ + if (bbr_process_ack(m, th, so, tp, to, tiwin, tlen, NULL, thflags, &ret_val)) { + return (ret_val); + } + if (sbavail(&so->so_snd)) { + if (bbr_progress_timeout_check(bbr)) { + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } + } + /* State changes only happen in bbr_process_data() */ + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); +} + +/* + * Return value of 1, the TCB is unlocked and most + * likely gone, return value of 0, the TCB is still + * locked. + */ +static int +bbr_do_close_wait(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) +{ + struct tcp_bbr *bbr; + int32_t ret_val; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + ctf_calc_rwin(so, tp); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); + /* + * RFC5961 Section 4.2 Send challenge ACK for any SYN in + * synchronized state. + */ + if (thflags & TH_SYN) { + ctf_challenge_ack(m, th, tp, &ret_val); + return (ret_val); + } + /* + * RFC 1323 PAWS: If we have a timestamp reply on this segment and + * it's less than ts_recent, drop it. + */ + if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && + TSTMP_LT(to->to_tsval, tp->ts_recent)) { + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) + return (ret_val); + } + INP_WLOCK_ASSERT(tp->t_inpcb); + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + return (ret_val); + } + /* + * If last ACK falls within this segment's sequence numbers, record + * its timestamp. NOTE: 1) That the test incorporates suggestions + * from the latest proposal of the tcplw@cray.com list (Braden + * 1993/04/26). 2) That updating only on newer timestamps interferes + * with our earlier PAWS tests, so this check should be solely + * predicated on the sequence space of this segment. 3) That we + * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ + * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + + * SEG.Len, This modified check allows us to overcome RFC1323's + * limitations as described in Stevens TCP/IP Illustrated Vol. 2 + * p.869. In such cases, we can still calculate the RTT correctly + * when RCV.NXT == Last.ACK.Sent. + */ + if ((to->to_flags & TOF_TS) != 0 && + SEQ_LEQ(th->th_seq, tp->last_ack_sent) && + SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + + ((thflags & (TH_SYN | TH_FIN)) != 0))) { + tp->ts_recent_age = tcp_tv_to_mssectick(&bbr->rc_tv); + tp->ts_recent = to->to_tsval; + } + /* + * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag + * is on (half-synchronized state), then queue data for later + * processing; else drop segment and return. + */ + if ((thflags & TH_ACK) == 0) { + if (tp->t_flags & TF_NEEDSYN) { + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); + } else if (tp->t_flags & TF_ACKNOW) { + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + bbr->r_wanted_output = 1; + return (ret_val); + } else { + ctf_do_drop(m, NULL); + return (0); + } + } + /* + * Ack processing. + */ + if (bbr_process_ack(m, th, so, tp, to, tiwin, tlen, NULL, thflags, &ret_val)) { + return (ret_val); + } + if (sbavail(&so->so_snd)) { + if (bbr_progress_timeout_check(bbr)) { + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } + } + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); +} + +static int +bbr_check_data_after_close(struct mbuf *m, struct tcp_bbr *bbr, + struct tcpcb *tp, int32_t * tlen, struct tcphdr *th, struct socket *so) +{ + + INP_INFO_RLOCK_ASSERT(&V_tcbinfo); + if (bbr->rc_allow_data_af_clo == 0) { +close_now: + tp = tcp_close(tp); + TCPSTAT_INC(tcps_rcvafterclose); + ctf_do_dropwithreset(m, tp, th, BANDLIM_UNLIMITED, (*tlen)); + return (1); + } + if (sbavail(&so->so_snd) == 0) + goto close_now; + /* Ok we allow data that is ignored and a followup reset */ + tp->rcv_nxt = th->th_seq + *tlen; + tp->t_flags2 |= TF2_DROP_AF_DATA; + bbr->r_wanted_output = 1; + *tlen = 0; + return (0); +} + +/* + * Return value of 1, the TCB is unlocked and most + * likely gone, return value of 0, the TCB is still + * locked. + */ +static int +bbr_do_fin_wait_1(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) +{ + int32_t ourfinisacked = 0; + int32_t ret_val; + struct tcp_bbr *bbr; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + ctf_calc_rwin(so, tp); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); + /* + * RFC5961 Section 4.2 Send challenge ACK for any SYN in + * synchronized state. + */ + if (thflags & TH_SYN) { + ctf_challenge_ack(m, th, tp, &ret_val); + return (ret_val); + } + /* + * RFC 1323 PAWS: If we have a timestamp reply on this segment and + * it's less than ts_recent, drop it. + */ + if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && + TSTMP_LT(to->to_tsval, tp->ts_recent)) { + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) + return (ret_val); + } + INP_WLOCK_ASSERT(tp->t_inpcb); + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + return (ret_val); + } + /* + * If new data are received on a connection after the user processes + * are gone, then RST the other end. + */ + if ((so->so_state & SS_NOFDREF) && tlen) { + /* + * We call a new function now so we might continue and setup + * to reset at all data being ack'd. + */ + if (bbr_check_data_after_close(m, bbr, tp, &tlen, th, so)) + return (1); + } + /* + * If last ACK falls within this segment's sequence numbers, record + * its timestamp. NOTE: 1) That the test incorporates suggestions + * from the latest proposal of the tcplw@cray.com list (Braden + * 1993/04/26). 2) That updating only on newer timestamps interferes + * with our earlier PAWS tests, so this check should be solely + * predicated on the sequence space of this segment. 3) That we + * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ + * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + + * SEG.Len, This modified check allows us to overcome RFC1323's + * limitations as described in Stevens TCP/IP Illustrated Vol. 2 + * p.869. In such cases, we can still calculate the RTT correctly + * when RCV.NXT == Last.ACK.Sent. + */ + if ((to->to_flags & TOF_TS) != 0 && + SEQ_LEQ(th->th_seq, tp->last_ack_sent) && + SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + + ((thflags & (TH_SYN | TH_FIN)) != 0))) { + tp->ts_recent_age = tcp_tv_to_mssectick(&bbr->rc_tv); + tp->ts_recent = to->to_tsval; + } + /* + * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag + * is on (half-synchronized state), then queue data for later + * processing; else drop segment and return. + */ + if ((thflags & TH_ACK) == 0) { + if (tp->t_flags & TF_NEEDSYN) { + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); + } else if (tp->t_flags & TF_ACKNOW) { + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + bbr->r_wanted_output = 1; + return (ret_val); + } else { + ctf_do_drop(m, NULL); + return (0); + } + } + /* + * Ack processing. + */ + if (bbr_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) { + return (ret_val); + } + if (ourfinisacked) { + /* + * If we can't receive any more data, then closing user can + * proceed. Starting the timer is contrary to the + * specification, but if we don't get a FIN we'll hang + * forever. + * + * XXXjl: we should release the tp also, and use a + * compressed state. + */ + if (so->so_rcv.sb_state & SBS_CANTRCVMORE) { + soisdisconnected(so); + tcp_timer_activate(tp, TT_2MSL, + (tcp_fast_finwait2_recycle ? + tcp_finwait2_timeout : + TP_MAXIDLE(tp))); + } + tcp_state_change(tp, TCPS_FIN_WAIT_2); + } + if (sbavail(&so->so_snd)) { + if (bbr_progress_timeout_check(bbr)) { + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } + } + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); +} + +/* + * Return value of 1, the TCB is unlocked and most + * likely gone, return value of 0, the TCB is still + * locked. + */ +static int +bbr_do_closing(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) +{ + int32_t ourfinisacked = 0; + int32_t ret_val; + struct tcp_bbr *bbr; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + ctf_calc_rwin(so, tp); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); + /* + * RFC5961 Section 4.2 Send challenge ACK for any SYN in + * synchronized state. + */ + if (thflags & TH_SYN) { + ctf_challenge_ack(m, th, tp, &ret_val); + return (ret_val); + } + /* + * RFC 1323 PAWS: If we have a timestamp reply on this segment and + * it's less than ts_recent, drop it. + */ + if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && + TSTMP_LT(to->to_tsval, tp->ts_recent)) { + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) + return (ret_val); + } + INP_WLOCK_ASSERT(tp->t_inpcb); + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + return (ret_val); + } + /* + * If new data are received on a connection after the user processes + * are gone, then RST the other end. + */ + if ((so->so_state & SS_NOFDREF) && tlen) { + /* + * We call a new function now so we might continue and setup + * to reset at all data being ack'd. + */ + if (bbr_check_data_after_close(m, bbr, tp, &tlen, th, so)) + return (1); + } + /* + * If last ACK falls within this segment's sequence numbers, record + * its timestamp. NOTE: 1) That the test incorporates suggestions + * from the latest proposal of the tcplw@cray.com list (Braden + * 1993/04/26). 2) That updating only on newer timestamps interferes + * with our earlier PAWS tests, so this check should be solely + * predicated on the sequence space of this segment. 3) That we + * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ + * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + + * SEG.Len, This modified check allows us to overcome RFC1323's + * limitations as described in Stevens TCP/IP Illustrated Vol. 2 + * p.869. In such cases, we can still calculate the RTT correctly + * when RCV.NXT == Last.ACK.Sent. + */ + if ((to->to_flags & TOF_TS) != 0 && + SEQ_LEQ(th->th_seq, tp->last_ack_sent) && + SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + + ((thflags & (TH_SYN | TH_FIN)) != 0))) { + tp->ts_recent_age = tcp_tv_to_mssectick(&bbr->rc_tv); + tp->ts_recent = to->to_tsval; + } + /* + * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag + * is on (half-synchronized state), then queue data for later + * processing; else drop segment and return. + */ + if ((thflags & TH_ACK) == 0) { + if (tp->t_flags & TF_NEEDSYN) { + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); + } else if (tp->t_flags & TF_ACKNOW) { + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + bbr->r_wanted_output = 1; + return (ret_val); + } else { + ctf_do_drop(m, NULL); + return (0); + } + } + /* + * Ack processing. + */ + if (bbr_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) { + return (ret_val); + } + if (ourfinisacked) { + INP_INFO_RLOCK_ASSERT(&V_tcbinfo); + tcp_twstart(tp); + m_freem(m); + return (1); + } + if (sbavail(&so->so_snd)) { + if (bbr_progress_timeout_check(bbr)) { + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } + } + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); +} + +/* + * Return value of 1, the TCB is unlocked and most + * likely gone, return value of 0, the TCB is still + * locked. + */ +static int +bbr_do_lastack(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) +{ + int32_t ourfinisacked = 0; + int32_t ret_val; + struct tcp_bbr *bbr; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + ctf_calc_rwin(so, tp); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); + /* + * RFC5961 Section 4.2 Send challenge ACK for any SYN in + * synchronized state. + */ + if (thflags & TH_SYN) { + ctf_challenge_ack(m, th, tp, &ret_val); + return (ret_val); + } + /* + * RFC 1323 PAWS: If we have a timestamp reply on this segment and + * it's less than ts_recent, drop it. + */ + if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && + TSTMP_LT(to->to_tsval, tp->ts_recent)) { + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) + return (ret_val); + } + INP_WLOCK_ASSERT(tp->t_inpcb); + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + return (ret_val); + } + /* + * If new data are received on a connection after the user processes + * are gone, then RST the other end. + */ + if ((so->so_state & SS_NOFDREF) && tlen) { + /* + * We call a new function now so we might continue and setup + * to reset at all data being ack'd. + */ + if (bbr_check_data_after_close(m, bbr, tp, &tlen, th, so)) + return (1); + } + /* + * If last ACK falls within this segment's sequence numbers, record + * its timestamp. NOTE: 1) That the test incorporates suggestions + * from the latest proposal of the tcplw@cray.com list (Braden + * 1993/04/26). 2) That updating only on newer timestamps interferes + * with our earlier PAWS tests, so this check should be solely + * predicated on the sequence space of this segment. 3) That we + * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ + * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + + * SEG.Len, This modified check allows us to overcome RFC1323's + * limitations as described in Stevens TCP/IP Illustrated Vol. 2 + * p.869. In such cases, we can still calculate the RTT correctly + * when RCV.NXT == Last.ACK.Sent. + */ + if ((to->to_flags & TOF_TS) != 0 && + SEQ_LEQ(th->th_seq, tp->last_ack_sent) && + SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + + ((thflags & (TH_SYN | TH_FIN)) != 0))) { + tp->ts_recent_age = tcp_tv_to_mssectick(&bbr->rc_tv); + tp->ts_recent = to->to_tsval; + } + /* + * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag + * is on (half-synchronized state), then queue data for later + * processing; else drop segment and return. + */ + if ((thflags & TH_ACK) == 0) { + if (tp->t_flags & TF_NEEDSYN) { + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); + } else if (tp->t_flags & TF_ACKNOW) { + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + bbr->r_wanted_output = 1; + return (ret_val); + } else { + ctf_do_drop(m, NULL); + return (0); + } + } + /* + * case TCPS_LAST_ACK: Ack processing. + */ + if (bbr_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) { + return (ret_val); + } + if (ourfinisacked) { + INP_INFO_RLOCK_ASSERT(&V_tcbinfo); + tp = tcp_close(tp); + ctf_do_drop(m, tp); + return (1); + } + if (sbavail(&so->so_snd)) { + if (bbr_progress_timeout_check(bbr)) { + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } + } + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); +} + + +/* + * Return value of 1, the TCB is unlocked and most + * likely gone, return value of 0, the TCB is still + * locked. + */ +static int +bbr_do_fin_wait_2(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, + uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) +{ + int32_t ourfinisacked = 0; + int32_t ret_val; + struct tcp_bbr *bbr; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + ctf_calc_rwin(so, tp); + /* Reset receive buffer auto scaling when not in bulk receive mode. */ + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); + + /* + * RFC5961 Section 4.2 Send challenge ACK for any SYN in + * synchronized state. + */ + if (thflags & TH_SYN) { + ctf_challenge_ack(m, th, tp, &ret_val); + return (ret_val); + } + INP_WLOCK_ASSERT(tp->t_inpcb); + /* + * RFC 1323 PAWS: If we have a timestamp reply on this segment and + * it's less than ts_recent, drop it. + */ + if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && + TSTMP_LT(to->to_tsval, tp->ts_recent)) { + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) + return (ret_val); + } + INP_WLOCK_ASSERT(tp->t_inpcb); + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + return (ret_val); + } + /* + * If new data are received on a connection after the user processes + * are gone, then we may RST the other end depending on the outcome + * of bbr_check_data_after_close. + */ + if ((so->so_state & SS_NOFDREF) && + tlen) { + /* + * We call a new function now so we might continue and setup + * to reset at all data being ack'd. + */ + if (bbr_check_data_after_close(m, bbr, tp, &tlen, th, so)) + return (1); + } + INP_WLOCK_ASSERT(tp->t_inpcb); + /* + * If last ACK falls within this segment's sequence numbers, record + * its timestamp. NOTE: 1) That the test incorporates suggestions + * from the latest proposal of the tcplw@cray.com list (Braden + * 1993/04/26). 2) That updating only on newer timestamps interferes + * with our earlier PAWS tests, so this check should be solely + * predicated on the sequence space of this segment. 3) That we + * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ + * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + + * SEG.Len, This modified check allows us to overcome RFC1323's + * limitations as described in Stevens TCP/IP Illustrated Vol. 2 + * p.869. In such cases, we can still calculate the RTT correctly + * when RCV.NXT == Last.ACK.Sent. + */ + INP_WLOCK_ASSERT(tp->t_inpcb); + if ((to->to_flags & TOF_TS) != 0 && + SEQ_LEQ(th->th_seq, tp->last_ack_sent) && + SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + + ((thflags & (TH_SYN | TH_FIN)) != 0))) { + tp->ts_recent_age = tcp_tv_to_mssectick(&bbr->rc_tv); + tp->ts_recent = to->to_tsval; + } + /* + * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag + * is on (half-synchronized state), then queue data for later + * processing; else drop segment and return. + */ + if ((thflags & TH_ACK) == 0) { + if (tp->t_flags & TF_NEEDSYN) { + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); + } else if (tp->t_flags & TF_ACKNOW) { + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + bbr->r_wanted_output = 1; + return (ret_val); + } else { + ctf_do_drop(m, NULL); + return (0); + } + } + /* + * Ack processing. + */ + INP_WLOCK_ASSERT(tp->t_inpcb); + if (bbr_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) { + return (ret_val); + } + if (sbavail(&so->so_snd)) { + if (bbr_progress_timeout_check(bbr)) { + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } + } + INP_WLOCK_ASSERT(tp->t_inpcb); + return (bbr_process_data(m, th, so, tp, drop_hdrlen, tlen, + tiwin, thflags, nxt_pkt)); +} + +static void +bbr_stop_all_timers(struct tcpcb *tp) +{ + struct tcp_bbr *bbr; + + /* + * Assure no timers are running. + */ + if (tcp_timer_active(tp, TT_PERSIST)) { + /* We enter in persists, set the flag appropriately */ + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + bbr->rc_in_persist = 1; + } + tcp_timer_suspend(tp, TT_PERSIST); + tcp_timer_suspend(tp, TT_REXMT); + tcp_timer_suspend(tp, TT_KEEP); + tcp_timer_suspend(tp, TT_DELACK); +} + +static void +bbr_google_mode_on(struct tcp_bbr *bbr) +{ + bbr->rc_use_google = 1; + bbr->rc_no_pacing = 0; + bbr->r_ctl.bbr_google_discount = bbr_google_discount; + bbr->r_use_policer = bbr_policer_detection_enabled; + bbr->r_ctl.rc_probertt_int = (USECS_IN_SECOND * 10); + bbr->bbr_use_rack_cheat = 0; + bbr->r_ctl.rc_incr_tmrs = 0; + bbr->r_ctl.rc_inc_tcp_oh = 0; + bbr->r_ctl.rc_inc_ip_oh = 0; + bbr->r_ctl.rc_inc_enet_oh = 0; + reset_time(&bbr->r_ctl.rc_delrate, + BBR_NUM_RTTS_FOR_GOOG_DEL_LIMIT); + reset_time_small(&bbr->r_ctl.rc_rttprop, + (11 * USECS_IN_SECOND)); + tcp_bbr_tso_size_check(bbr, tcp_get_usecs(&bbr->rc_tv)); +} + +static void +bbr_google_mode_off(struct tcp_bbr *bbr) +{ + bbr->rc_use_google = 0; + bbr->r_ctl.bbr_google_discount = 0; + bbr->no_pacing_until = bbr_no_pacing_until; + bbr->r_use_policer = 0; + if (bbr->no_pacing_until) + bbr->rc_no_pacing = 1; + else + bbr->rc_no_pacing = 0; + if (bbr_use_rack_resend_cheat) + bbr->bbr_use_rack_cheat = 1; + else + bbr->bbr_use_rack_cheat = 0; + if (bbr_incr_timers) + bbr->r_ctl.rc_incr_tmrs = 1; + else + bbr->r_ctl.rc_incr_tmrs = 0; + if (bbr_include_tcp_oh) + bbr->r_ctl.rc_inc_tcp_oh = 1; + else + bbr->r_ctl.rc_inc_tcp_oh = 0; + if (bbr_include_ip_oh) + bbr->r_ctl.rc_inc_ip_oh = 1; + else + bbr->r_ctl.rc_inc_ip_oh = 0; + if (bbr_include_enet_oh) + bbr->r_ctl.rc_inc_enet_oh = 1; + else + bbr->r_ctl.rc_inc_enet_oh = 0; + bbr->r_ctl.rc_probertt_int = bbr_rtt_probe_limit; + reset_time(&bbr->r_ctl.rc_delrate, + bbr_num_pktepo_for_del_limit); + reset_time_small(&bbr->r_ctl.rc_rttprop, + (bbr_filter_len_sec * USECS_IN_SECOND)); + tcp_bbr_tso_size_check(bbr, tcp_get_usecs(&bbr->rc_tv)); +} +/* + * Return 0 on success, non-zero on failure + * which indicates the error (usually no memory). + */ +static int +bbr_init(struct tcpcb *tp) +{ + struct tcp_bbr *bbr = NULL; + struct inpcb *inp; + uint32_t cts; + + tp->t_fb_ptr = uma_zalloc(bbr_pcb_zone, (M_NOWAIT | M_ZERO)); + if (tp->t_fb_ptr == NULL) { + /* + * We need to allocate memory but cant. The INP and INP_INFO + * locks and they are recusive (happens during setup. So a + * scheme to drop the locks fails :( + * + */ + return (ENOMEM); + } + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + bbr->rtt_valid = 0; + inp = tp->t_inpcb; + inp->inp_flags2 |= INP_CANNOT_DO_ECN; + inp->inp_flags2 |= INP_SUPPORTS_MBUFQ; + TAILQ_INIT(&bbr->r_ctl.rc_map); + TAILQ_INIT(&bbr->r_ctl.rc_free); + TAILQ_INIT(&bbr->r_ctl.rc_tmap); + bbr->rc_tp = tp; + if (tp->t_inpcb) { + bbr->rc_inp = tp->t_inpcb; + } + cts = tcp_get_usecs(&bbr->rc_tv); + tp->t_acktime = 0; + bbr->rc_allow_data_af_clo = bbr_ignore_data_after_close; + bbr->r_ctl.rc_reorder_fade = bbr_reorder_fade; + bbr->rc_tlp_threshold = bbr_tlp_thresh; + bbr->r_ctl.rc_reorder_shift = bbr_reorder_thresh; + bbr->r_ctl.rc_pkt_delay = bbr_pkt_delay; + bbr->r_ctl.rc_min_to = bbr_min_to; + bbr->rc_bbr_state = BBR_STATE_STARTUP; + bbr->r_ctl.bbr_lost_at_state = 0; + bbr->r_ctl.rc_lost_at_startup = 0; + bbr->rc_all_timers_stopped = 0; + bbr->r_ctl.rc_bbr_lastbtlbw = 0; + bbr->r_ctl.rc_pkt_epoch_del = 0; + bbr->r_ctl.rc_pkt_epoch = 0; + bbr->r_ctl.rc_lowest_rtt = 0xffffffff; + bbr->r_ctl.rc_bbr_hptsi_gain = bbr_high_gain; + bbr->r_ctl.rc_bbr_cwnd_gain = bbr_high_gain; + bbr->r_ctl.rc_went_idle_time = cts; + bbr->rc_pacer_started = cts; + bbr->r_ctl.rc_pkt_epoch_time = cts; + bbr->r_ctl.rc_rcvtime = cts; + bbr->r_ctl.rc_bbr_state_time = cts; + bbr->r_ctl.rc_del_time = cts; + bbr->r_ctl.rc_tlp_rxt_last_time = cts; + bbr->r_ctl.last_in_probertt = cts; + bbr->skip_gain = 0; + bbr->gain_is_limited = 0; + bbr->no_pacing_until = bbr_no_pacing_until; + if (bbr->no_pacing_until) + bbr->rc_no_pacing = 1; + if (bbr_use_google_algo) { + bbr->rc_no_pacing = 0; + bbr->rc_use_google = 1; + bbr->r_ctl.bbr_google_discount = bbr_google_discount; + bbr->r_use_policer = bbr_policer_detection_enabled; + } else { + bbr->rc_use_google = 0; + bbr->r_ctl.bbr_google_discount = 0; + bbr->r_use_policer = 0; + } + if (bbr_ts_limiting) + bbr->rc_use_ts_limit = 1; + else + bbr->rc_use_ts_limit = 0; + if (bbr_ts_can_raise) + bbr->ts_can_raise = 1; + else + bbr->ts_can_raise = 0; + if (V_tcp_delack_enabled == 1) + tp->t_delayed_ack = 2; + else if (V_tcp_delack_enabled == 0) + tp->t_delayed_ack = 0; + else if (V_tcp_delack_enabled < 100) + tp->t_delayed_ack = V_tcp_delack_enabled; + else + tp->t_delayed_ack = 2; + if (bbr->rc_use_google == 0) + bbr->r_ctl.rc_probertt_int = bbr_rtt_probe_limit; + else + bbr->r_ctl.rc_probertt_int = (USECS_IN_SECOND * 10); + bbr->r_ctl.rc_min_rto_ms = bbr_rto_min_ms; + bbr->rc_max_rto_sec = bbr_rto_max_sec; + bbr->rc_init_win = bbr_def_init_win; + if (tp->t_flags & TF_REQ_TSTMP) + bbr->rc_last_options = TCP_TS_OVERHEAD; + bbr->r_ctl.rc_pace_max_segs = tp->t_maxseg - bbr->rc_last_options; + bbr->r_ctl.rc_high_rwnd = tp->snd_wnd; + bbr->r_init_rtt = 1; + + counter_u64_add(bbr_flows_nohdwr_pacing, 1); + if (bbr_allow_hdwr_pacing) + bbr->bbr_hdw_pace_ena = 1; + else + bbr->bbr_hdw_pace_ena = 0; + if (bbr_sends_full_iwnd) + bbr->bbr_init_win_cheat = 1; + else + bbr->bbr_init_win_cheat = 0; + bbr->r_ctl.bbr_utter_max = bbr_hptsi_utter_max; + bbr->r_ctl.rc_drain_pg = bbr_drain_gain; + bbr->r_ctl.rc_startup_pg = bbr_high_gain; + bbr->rc_loss_exit = bbr_exit_startup_at_loss; + bbr->r_ctl.bbr_rttprobe_gain_val = bbr_rttprobe_gain; + bbr->r_ctl.bbr_hptsi_per_second = bbr_hptsi_per_second; + bbr->r_ctl.bbr_hptsi_segments_delay_tar = bbr_hptsi_segments_delay_tar; + bbr->r_ctl.bbr_hptsi_segments_max = bbr_hptsi_segments_max; + bbr->r_ctl.bbr_hptsi_segments_floor = bbr_hptsi_segments_floor; + bbr->r_ctl.bbr_hptsi_bytes_min = bbr_hptsi_bytes_min; + bbr->r_ctl.bbr_cross_over = bbr_cross_over; + bbr->r_ctl.rc_rtt_shrinks = cts; + if (bbr->rc_use_google) { + setup_time_filter(&bbr->r_ctl.rc_delrate, + FILTER_TYPE_MAX, + BBR_NUM_RTTS_FOR_GOOG_DEL_LIMIT); + setup_time_filter_small(&bbr->r_ctl.rc_rttprop, + FILTER_TYPE_MIN, (11 * USECS_IN_SECOND)); + } else { + setup_time_filter(&bbr->r_ctl.rc_delrate, + FILTER_TYPE_MAX, + bbr_num_pktepo_for_del_limit); + setup_time_filter_small(&bbr->r_ctl.rc_rttprop, + FILTER_TYPE_MIN, (bbr_filter_len_sec * USECS_IN_SECOND)); + } + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_INIT, 0); + if (bbr_uses_idle_restart) + bbr->rc_use_idle_restart = 1; + else + bbr->rc_use_idle_restart = 0; + bbr->r_ctl.rc_bbr_cur_del_rate = 0; + bbr->r_ctl.rc_initial_hptsi_bw = bbr_initial_bw_bps; + if (bbr_resends_use_tso) + bbr->rc_resends_use_tso = 1; +#ifdef NETFLIX_PEAKRATE + tp->t_peakrate_thr = tp->t_maxpeakrate; +#endif + if (tp->snd_una != tp->snd_max) { + /* Create a send map for the current outstanding data */ + struct bbr_sendmap *rsm; + + rsm = bbr_alloc(bbr); + if (rsm == NULL) { + uma_zfree(bbr_pcb_zone, tp->t_fb_ptr); + tp->t_fb_ptr = NULL; + return (ENOMEM); + } + rsm->r_flags = BBR_OVERMAX; + rsm->r_tim_lastsent[0] = cts; + rsm->r_rtr_cnt = 1; + rsm->r_rtr_bytes = 0; + rsm->r_start = tp->snd_una; + rsm->r_end = tp->snd_max; + rsm->r_dupack = 0; + rsm->r_delivered = bbr->r_ctl.rc_delivered; + rsm->r_ts_valid = 0; + rsm->r_del_ack_ts = tp->ts_recent; + rsm->r_del_time = cts; + if (bbr->r_ctl.r_app_limited_until) + rsm->r_app_limited = 1; + else + rsm->r_app_limited = 0; + TAILQ_INSERT_TAIL(&bbr->r_ctl.rc_map, rsm, r_next); + TAILQ_INSERT_TAIL(&bbr->r_ctl.rc_tmap, rsm, r_tnext); + rsm->r_in_tmap = 1; + if (bbr->rc_bbr_state == BBR_STATE_PROBE_BW) + rsm->r_bbr_state = bbr_state_val(bbr); + else + rsm->r_bbr_state = 8; + } + if (bbr_use_rack_resend_cheat && (bbr->rc_use_google == 0)) + bbr->bbr_use_rack_cheat = 1; + if (bbr_incr_timers && (bbr->rc_use_google == 0)) + bbr->r_ctl.rc_incr_tmrs = 1; + if (bbr_include_tcp_oh && (bbr->rc_use_google == 0)) + bbr->r_ctl.rc_inc_tcp_oh = 1; + if (bbr_include_ip_oh && (bbr->rc_use_google == 0)) + bbr->r_ctl.rc_inc_ip_oh = 1; + if (bbr_include_enet_oh && (bbr->rc_use_google == 0)) + bbr->r_ctl.rc_inc_enet_oh = 1; + + bbr_log_type_statechange(bbr, cts, __LINE__); + if (TCPS_HAVEESTABLISHED(tp->t_state) && + (tp->t_srtt)) { + uint32_t rtt; + + rtt = (TICKS_2_USEC(tp->t_srtt) >> TCP_RTT_SHIFT); + apply_filter_min_small(&bbr->r_ctl.rc_rttprop, rtt, cts); + } + /* announce the settings and state */ + bbr_log_settings_change(bbr, BBR_RECOVERY_LOWRTT); + tcp_bbr_tso_size_check(bbr, cts); + /* + * Now call the generic function to start a timer. This will place + * the TCB on the hptsi wheel if a timer is needed with appropriate + * flags. + */ + bbr_stop_all_timers(tp); + bbr_start_hpts_timer(bbr, tp, cts, 5, 0, 0); + return (0); +} + +/* + * Return 0 if we can accept the connection. Return + * non-zero if we can't handle the connection. A EAGAIN + * means you need to wait until the connection is up. + * a EADDRNOTAVAIL means we can never handle the connection + * (no SACK). + */ +static int +bbr_handoff_ok(struct tcpcb *tp) +{ + if ((tp->t_state == TCPS_CLOSED) || + (tp->t_state == TCPS_LISTEN)) { + /* Sure no problem though it may not stick */ + return (0); + } + if ((tp->t_state == TCPS_SYN_SENT) || + (tp->t_state == TCPS_SYN_RECEIVED)) { + /* + * We really don't know you have to get to ESTAB or beyond + * to tell. + */ + return (EAGAIN); + } + if ((tp->t_flags & TF_SACK_PERMIT) || bbr_sack_not_required) { + return (0); + } + /* + * If we reach here we don't do SACK on this connection so we can + * never do rack. + */ + return (EINVAL); +} + +static void +bbr_fini(struct tcpcb *tp, int32_t tcb_is_purged) +{ + if (tp->t_fb_ptr) { + uint32_t calc; + struct tcp_bbr *bbr; + struct bbr_sendmap *rsm; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + if (bbr->r_ctl.crte) + tcp_rel_pacing_rate(bbr->r_ctl.crte, bbr->rc_tp); + bbr_log_flowend(bbr); + bbr->rc_tp = NULL; + if (tp->t_inpcb) { + /* Backout any flags2 we applied */ + tp->t_inpcb->inp_flags2 &= ~INP_CANNOT_DO_ECN; + tp->t_inpcb->inp_flags2 &= ~INP_SUPPORTS_MBUFQ; + tp->t_inpcb->inp_flags2 &= ~INP_MBUF_QUEUE_READY; + } + if (bbr->bbr_hdrw_pacing) + counter_u64_add(bbr_flows_whdwr_pacing, -1); + else + counter_u64_add(bbr_flows_nohdwr_pacing, -1); + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map); + while (rsm) { + TAILQ_REMOVE(&bbr->r_ctl.rc_map, rsm, r_next); + uma_zfree(bbr_zone, rsm); + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map); + } + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_free); + while (rsm) { + TAILQ_REMOVE(&bbr->r_ctl.rc_free, rsm, r_next); + uma_zfree(bbr_zone, rsm); + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_free); + } + calc = bbr->r_ctl.rc_high_rwnd - bbr->r_ctl.rc_init_rwnd; + if (calc > (bbr->r_ctl.rc_init_rwnd / 10)) + BBR_STAT_INC(bbr_dynamic_rwnd); + else + BBR_STAT_INC(bbr_static_rwnd); + bbr->r_ctl.rc_free_cnt = 0; + uma_zfree(bbr_pcb_zone, tp->t_fb_ptr); + tp->t_fb_ptr = NULL; + } + /* Make sure snd_nxt is correctly set */ + tp->snd_nxt = tp->snd_max; +} + +static void +bbr_set_state(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t win) +{ + switch (tp->t_state) { + case TCPS_SYN_SENT: + bbr->r_state = TCPS_SYN_SENT; + bbr->r_substate = bbr_do_syn_sent; + break; + case TCPS_SYN_RECEIVED: + bbr->r_state = TCPS_SYN_RECEIVED; + bbr->r_substate = bbr_do_syn_recv; + break; + case TCPS_ESTABLISHED: + bbr->r_ctl.rc_init_rwnd = max(win, bbr->rc_tp->snd_wnd); + bbr->r_state = TCPS_ESTABLISHED; + bbr->r_substate = bbr_do_established; + break; + case TCPS_CLOSE_WAIT: + bbr->r_state = TCPS_CLOSE_WAIT; + bbr->r_substate = bbr_do_close_wait; + break; + case TCPS_FIN_WAIT_1: + bbr->r_state = TCPS_FIN_WAIT_1; + bbr->r_substate = bbr_do_fin_wait_1; + break; + case TCPS_CLOSING: + bbr->r_state = TCPS_CLOSING; + bbr->r_substate = bbr_do_closing; + break; + case TCPS_LAST_ACK: + bbr->r_state = TCPS_LAST_ACK; + bbr->r_substate = bbr_do_lastack; + break; + case TCPS_FIN_WAIT_2: + bbr->r_state = TCPS_FIN_WAIT_2; + bbr->r_substate = bbr_do_fin_wait_2; + break; + case TCPS_LISTEN: + case TCPS_CLOSED: + case TCPS_TIME_WAIT: + default: + break; + }; +} + +static void +bbr_substate_change(struct tcp_bbr *bbr, uint32_t cts, int32_t line, int dolog) +{ + /* + * Now what state are we going into now? Is there adjustments + * needed? + */ + int32_t old_state, old_gain; + + + old_state = bbr_state_val(bbr); + old_gain = bbr->r_ctl.rc_bbr_hptsi_gain; + if (bbr_state_val(bbr) == BBR_SUB_LEVEL1) { + /* Save the lowest srtt we saw in our end of the sub-state */ + bbr->rc_hit_state_1 = 0; + if (bbr->r_ctl.bbr_smallest_srtt_this_state != 0xffffffff) + bbr->r_ctl.bbr_smallest_srtt_state2 = bbr->r_ctl.bbr_smallest_srtt_this_state; + } + bbr->rc_bbr_substate++; + if (bbr->rc_bbr_substate >= BBR_SUBSTATE_COUNT) { + /* Cycle back to first state-> gain */ + bbr->rc_bbr_substate = 0; + } + if (bbr_state_val(bbr) == BBR_SUB_GAIN) { + /* + * We enter the gain(5/4) cycle (possibly less if + * shallow buffer detection is enabled) + */ + if (bbr->skip_gain) { + /* + * Hardware pacing has set our rate to + * the max and limited our b/w just + * do level i.e. no gain. + */ + bbr->r_ctl.rc_bbr_hptsi_gain = bbr_hptsi_gain[BBR_SUB_LEVEL1]; + } else if (bbr->gain_is_limited && + bbr->bbr_hdrw_pacing && + bbr->r_ctl.crte) { + /* + * We can't gain above the hardware pacing + * rate which is less than our rate + the gain + * calculate the gain needed to reach the hardware + * pacing rate.. + */ + uint64_t bw, rate, gain_calc; + + bw = bbr_get_bw(bbr); + rate = bbr->r_ctl.crte->rate; + if ((rate > bw) && + (((bw * (uint64_t)bbr_hptsi_gain[BBR_SUB_GAIN]) / (uint64_t)BBR_UNIT) > rate)) { + gain_calc = (rate * BBR_UNIT) / bw; + if (gain_calc < BBR_UNIT) + gain_calc = BBR_UNIT; + bbr->r_ctl.rc_bbr_hptsi_gain = (uint16_t)gain_calc; + } else { + bbr->r_ctl.rc_bbr_hptsi_gain = bbr_hptsi_gain[BBR_SUB_GAIN]; + } + } else + bbr->r_ctl.rc_bbr_hptsi_gain = bbr_hptsi_gain[BBR_SUB_GAIN]; + if ((bbr->rc_use_google == 0) && (bbr_gain_to_target == 0)) { + bbr->r_ctl.rc_bbr_state_atflight = cts; + } else + bbr->r_ctl.rc_bbr_state_atflight = 0; + } else if (bbr_state_val(bbr) == BBR_SUB_DRAIN) { + bbr->rc_hit_state_1 = 1; + bbr->r_ctl.rc_exta_time_gd = 0; + bbr->r_ctl.flightsize_at_drain = ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + if (bbr_state_drain_2_tar) { + bbr->r_ctl.rc_bbr_state_atflight = 0; + } else + bbr->r_ctl.rc_bbr_state_atflight = cts; + bbr->r_ctl.rc_bbr_hptsi_gain = bbr_hptsi_gain[BBR_SUB_DRAIN]; + } else { + /* All other cycles hit here 2-7 */ + if ((old_state == BBR_SUB_DRAIN) && bbr->rc_hit_state_1) { + if (bbr_sub_drain_slam_cwnd && + (bbr->rc_use_google == 0) && + (bbr->rc_tp->snd_cwnd < bbr->r_ctl.rc_saved_cwnd)) { + bbr->rc_tp->snd_cwnd = bbr->r_ctl.rc_saved_cwnd; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } + if ((cts - bbr->r_ctl.rc_bbr_state_time) > bbr_get_rtt(bbr, BBR_RTT_PROP)) + bbr->r_ctl.rc_exta_time_gd += ((cts - bbr->r_ctl.rc_bbr_state_time) - + bbr_get_rtt(bbr, BBR_RTT_PROP)); + else + bbr->r_ctl.rc_exta_time_gd = 0; + if (bbr->r_ctl.rc_exta_time_gd) { + bbr->r_ctl.rc_level_state_extra = bbr->r_ctl.rc_exta_time_gd; + /* Now chop up the time for each state (div by 7) */ + bbr->r_ctl.rc_level_state_extra /= 7; + if (bbr_rand_ot && bbr->r_ctl.rc_level_state_extra) { + /* Add a randomization */ + bbr_randomize_extra_state_time(bbr); + } + } + } + bbr->r_ctl.rc_bbr_state_atflight = max(1, cts); + bbr->r_ctl.rc_bbr_hptsi_gain = bbr_hptsi_gain[bbr_state_val(bbr)]; + } + if (bbr->rc_use_google) { + bbr->r_ctl.rc_bbr_state_atflight = max(1, cts); + } + bbr->r_ctl.bbr_lost_at_state = bbr->r_ctl.rc_lost; + bbr->r_ctl.rc_bbr_cwnd_gain = bbr_cwnd_gain; + if (dolog) + bbr_log_type_statechange(bbr, cts, line); + + if (SEQ_GT(cts, bbr->r_ctl.rc_bbr_state_time)) { + uint32_t time_in; + + time_in = cts - bbr->r_ctl.rc_bbr_state_time; + if (bbr->rc_bbr_state == BBR_STATE_PROBE_BW) { + counter_u64_add(bbr_state_time[(old_state + 5)], time_in); + } else { + counter_u64_add(bbr_state_time[bbr->rc_bbr_state], time_in); + } + } + bbr->r_ctl.bbr_smallest_srtt_this_state = 0xffffffff; + bbr_set_state_target(bbr, __LINE__); + if (bbr_sub_drain_slam_cwnd && + (bbr->rc_use_google == 0) && + (bbr_state_val(bbr) == BBR_SUB_DRAIN)) { + /* Slam down the cwnd */ + bbr->r_ctl.rc_saved_cwnd = bbr->rc_tp->snd_cwnd; + bbr->rc_tp->snd_cwnd = bbr->r_ctl.rc_target_at_state; + if (bbr_sub_drain_app_limit) { + /* Go app limited if we are on a long drain */ + bbr->r_ctl.r_app_limited_until = (bbr->r_ctl.rc_delivered + + ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + + bbr->r_ctl.rc_lost_bytes))); + } + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } + if (bbr->rc_lt_use_bw) { + /* In policed mode we clamp pacing_gain to BBR_UNIT */ + bbr->r_ctl.rc_bbr_hptsi_gain = BBR_UNIT; + } + /* Google changes TSO size every cycle */ + if (bbr->rc_use_google) + tcp_bbr_tso_size_check(bbr, cts); + bbr->r_ctl.gain_epoch = cts; + bbr->r_ctl.rc_bbr_state_time = cts; + bbr->r_ctl.substate_pe = bbr->r_ctl.rc_pkt_epoch; +} + +static void +bbr_set_probebw_google_gains(struct tcp_bbr *bbr, uint32_t cts, uint32_t losses) +{ + if ((bbr_state_val(bbr) == BBR_SUB_DRAIN) && + (google_allow_early_out == 1) && + (bbr->r_ctl.rc_flight_at_input <= bbr->r_ctl.rc_target_at_state)) { + /* We have reached out target flight size possibly early */ + goto change_state; + } + if (TSTMP_LT(cts, bbr->r_ctl.rc_bbr_state_time)) { + return; + } + if ((cts - bbr->r_ctl.rc_bbr_state_time) < bbr_get_rtt(bbr, BBR_RTT_PROP)) { + /* + * Must be a rttProp movement forward before + * we can change states. + */ + return; + } + if (bbr_state_val(bbr) == BBR_SUB_GAIN) { + /* + * The needed time has passed but for + * the gain cycle extra rules apply: + * 1) If we have seen loss, we exit + * 2) If we have not reached the target + * we stay in GAIN (gain-to-target). + */ + if (google_consider_lost && losses) + goto change_state; + if (bbr->r_ctl.rc_target_at_state > bbr->r_ctl.rc_flight_at_input) { + return; + } + } +change_state: + /* For gain we must reach our target, all others last 1 rttProp */ + bbr_substate_change(bbr, cts, __LINE__, 1); +} + +static void +bbr_set_probebw_gains(struct tcp_bbr *bbr, uint32_t cts, uint32_t losses) +{ + uint32_t flight, bbr_cur_cycle_time; + + if (bbr->rc_use_google) { + bbr_set_probebw_google_gains(bbr, cts, losses); + return; + } + if (cts == 0) { + /* + * Never alow cts to be 0 we + * do this so we can judge if + * we have set a timestamp. + */ + cts = 1; + } + if (bbr_state_is_pkt_epoch) + bbr_cur_cycle_time = bbr_get_rtt(bbr, BBR_RTT_PKTRTT); + else + bbr_cur_cycle_time = bbr_get_rtt(bbr, BBR_RTT_PROP); + + if (bbr->r_ctl.rc_bbr_state_atflight == 0) { + if (bbr_state_val(bbr) == BBR_SUB_DRAIN) { + flight = ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + if (bbr_sub_drain_slam_cwnd && bbr->rc_hit_state_1) { + /* Keep it slam down */ + if (bbr->rc_tp->snd_cwnd > bbr->r_ctl.rc_target_at_state) { + bbr->rc_tp->snd_cwnd = bbr->r_ctl.rc_target_at_state; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } + if (bbr_sub_drain_app_limit) { + /* Go app limited if we are on a long drain */ + bbr->r_ctl.r_app_limited_until = (bbr->r_ctl.rc_delivered + flight); + } + } + if (TSTMP_GT(cts, bbr->r_ctl.gain_epoch) && + (((cts - bbr->r_ctl.gain_epoch) > bbr_get_rtt(bbr, BBR_RTT_PROP)) || + (flight >= bbr->r_ctl.flightsize_at_drain))) { + /* + * Still here after the same time as + * the gain. We need to drain harder + * for the next srtt. Reduce by a set amount + * the gain drop is capped at DRAIN states + * value (88). + */ + bbr->r_ctl.flightsize_at_drain = flight; + if (bbr_drain_drop_mul && + bbr_drain_drop_div && + (bbr_drain_drop_mul < bbr_drain_drop_div)) { + /* Use your specific drop value (def 4/5 = 20%) */ + bbr->r_ctl.rc_bbr_hptsi_gain *= bbr_drain_drop_mul; + bbr->r_ctl.rc_bbr_hptsi_gain /= bbr_drain_drop_div; + } else { + /* You get drop of 20% */ + bbr->r_ctl.rc_bbr_hptsi_gain *= 4; + bbr->r_ctl.rc_bbr_hptsi_gain /= 5; + } + if (bbr->r_ctl.rc_bbr_hptsi_gain <= bbr_drain_floor) { + /* Reduce our gain again to the bottom */ + bbr->r_ctl.rc_bbr_hptsi_gain = max(bbr_drain_floor, 1); + } + bbr_log_exit_gain(bbr, cts, 4); + /* + * Extend out so we wait another + * epoch before dropping again. + */ + bbr->r_ctl.gain_epoch = cts; + } + if (flight <= bbr->r_ctl.rc_target_at_state) { + if (bbr_sub_drain_slam_cwnd && + (bbr->rc_use_google == 0) && + (bbr->rc_tp->snd_cwnd < bbr->r_ctl.rc_saved_cwnd)) { + bbr->rc_tp->snd_cwnd = bbr->r_ctl.rc_saved_cwnd; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } + bbr->r_ctl.rc_bbr_state_atflight = max(cts, 1); + bbr_log_exit_gain(bbr, cts, 3); + } + } else { + /* Its a gain */ + if (bbr->r_ctl.rc_lost > bbr->r_ctl.bbr_lost_at_state) { + bbr->r_ctl.rc_bbr_state_atflight = max(cts, 1); + goto change_state; + } + if ((ctf_outstanding(bbr->rc_tp) >= bbr->r_ctl.rc_target_at_state) || + ((ctf_outstanding(bbr->rc_tp) + bbr->rc_tp->t_maxseg - 1) >= + bbr->rc_tp->snd_wnd)) { + bbr->r_ctl.rc_bbr_state_atflight = max(cts, 1); + bbr_log_exit_gain(bbr, cts, 2); + } + } + /** + * We fall through and return always one of two things has + * occured. + * 1) We are still not at target + * + * 2) We reached the target and set rc_bbr_state_atflight + * which means we no longer hit this block + * next time we are called. + */ + return; + } +change_state: + if (TSTMP_LT(cts, bbr->r_ctl.rc_bbr_state_time)) + return; + if ((cts - bbr->r_ctl.rc_bbr_state_time) < bbr_cur_cycle_time) { + /* Less than a full time-period has passed */ + return; + } + if (bbr->r_ctl.rc_level_state_extra && + (bbr_state_val(bbr) > BBR_SUB_DRAIN) && + ((cts - bbr->r_ctl.rc_bbr_state_time) < + (bbr_cur_cycle_time + bbr->r_ctl.rc_level_state_extra))) { + /* Less than a full time-period + extra has passed */ + return; + } + if (bbr_gain_gets_extra_too && + bbr->r_ctl.rc_level_state_extra && + (bbr_state_val(bbr) == BBR_SUB_GAIN) && + ((cts - bbr->r_ctl.rc_bbr_state_time) < + (bbr_cur_cycle_time + bbr->r_ctl.rc_level_state_extra))) { + /* Less than a full time-period + extra has passed */ + return; + } + bbr_substate_change(bbr, cts, __LINE__, 1); +} + +static uint32_t +bbr_get_a_state_target(struct tcp_bbr *bbr, uint32_t gain) +{ + uint32_t mss, tar; + + if (bbr->rc_use_google) { + /* Google just uses the cwnd target */ + tar = bbr_get_target_cwnd(bbr, bbr_get_bw(bbr), gain); + } else { + mss = min((bbr->rc_tp->t_maxseg - bbr->rc_last_options), + bbr->r_ctl.rc_pace_max_segs); + /* Get the base cwnd with gain rounded to a mss */ + tar = roundup(bbr_get_raw_target_cwnd(bbr, bbr_get_bw(bbr), + gain), mss); + /* Make sure it is within our min */ + if (tar < get_min_cwnd(bbr)) + return (get_min_cwnd(bbr)); + } + return (tar); +} + +static void +bbr_set_state_target(struct tcp_bbr *bbr, int line) +{ + uint32_t tar, meth; + + if ((bbr->rc_bbr_state == BBR_STATE_PROBE_RTT) && + ((bbr->r_ctl.bbr_rttprobe_gain_val == 0) || bbr->rc_use_google)) { + /* Special case using old probe-rtt method */ + tar = bbr_rtt_probe_cwndtarg * (bbr->rc_tp->t_maxseg - bbr->rc_last_options); + meth = 1; + } else { + /* Non-probe-rtt case and reduced probe-rtt */ + if ((bbr->rc_bbr_state == BBR_STATE_PROBE_BW) && + (bbr->r_ctl.rc_bbr_hptsi_gain > BBR_UNIT)) { + /* For gain cycle we use the hptsi gain */ + tar = bbr_get_a_state_target(bbr, bbr->r_ctl.rc_bbr_hptsi_gain); + meth = 2; + } else if ((bbr_target_is_bbunit) || bbr->rc_use_google) { + /* + * If configured, or for google all other states + * get BBR_UNIT. + */ + tar = bbr_get_a_state_target(bbr, BBR_UNIT); + meth = 3; + } else { + /* + * Or we set a target based on the pacing gain + * for non-google mode and default (non-configured). + * Note we don't set a target goal below drain (192). + */ + if (bbr->r_ctl.rc_bbr_hptsi_gain < bbr_hptsi_gain[BBR_SUB_DRAIN]) { + tar = bbr_get_a_state_target(bbr, bbr_hptsi_gain[BBR_SUB_DRAIN]); + meth = 4; + } else { + tar = bbr_get_a_state_target(bbr, bbr->r_ctl.rc_bbr_hptsi_gain); + meth = 5; + } + } + } + bbr_log_set_of_state_target(bbr, tar, line, meth); + bbr->r_ctl.rc_target_at_state = tar; +} + +static void +bbr_enter_probe_rtt(struct tcp_bbr *bbr, uint32_t cts, int32_t line) +{ + /* Change to probe_rtt */ + uint32_t time_in; + + bbr->r_ctl.bbr_lost_at_state = bbr->r_ctl.rc_lost; + bbr->r_ctl.flightsize_at_drain = ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + bbr->r_ctl.r_app_limited_until = (bbr->r_ctl.flightsize_at_drain + + bbr->r_ctl.rc_delivered); + /* Setup so we force feed the filter */ + if (bbr->rc_use_google || bbr_probertt_sets_rtt) + bbr->rc_prtt_set_ts = 1; + if (SEQ_GT(cts, bbr->r_ctl.rc_bbr_state_time)) { + time_in = cts - bbr->r_ctl.rc_bbr_state_time; + counter_u64_add(bbr_state_time[bbr->rc_bbr_state], time_in); + } + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_ENTERPROBE, 0); + bbr->r_ctl.rc_rtt_shrinks = cts; + bbr->r_ctl.last_in_probertt = cts; + bbr->r_ctl.rc_probertt_srttchktim = cts; + bbr->r_ctl.rc_bbr_state_time = cts; + bbr->rc_bbr_state = BBR_STATE_PROBE_RTT; + /* We need to force the filter to update */ + + if ((bbr_sub_drain_slam_cwnd) && + bbr->rc_hit_state_1 && + (bbr->rc_use_google == 0) && + (bbr_state_val(bbr) == BBR_SUB_DRAIN)) { + if (bbr->rc_tp->snd_cwnd > bbr->r_ctl.rc_saved_cwnd) + bbr->r_ctl.rc_saved_cwnd = bbr->rc_tp->snd_cwnd; + } else + bbr->r_ctl.rc_saved_cwnd = bbr->rc_tp->snd_cwnd; + /* Update the lost */ + bbr->r_ctl.rc_lost_at_startup = bbr->r_ctl.rc_lost; + if ((bbr->r_ctl.bbr_rttprobe_gain_val == 0) || bbr->rc_use_google){ + /* Set to the non-configurable default of 4 (PROBE_RTT_MIN) */ + bbr->rc_tp->snd_cwnd = bbr_rtt_probe_cwndtarg * (bbr->rc_tp->t_maxseg - bbr->rc_last_options); + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + bbr->r_ctl.rc_bbr_hptsi_gain = BBR_UNIT; + bbr->r_ctl.rc_bbr_cwnd_gain = BBR_UNIT; + bbr_log_set_of_state_target(bbr, bbr->rc_tp->snd_cwnd, __LINE__, 6); + bbr->r_ctl.rc_target_at_state = bbr->rc_tp->snd_cwnd; + } else { + /* + * We bring it down slowly by using a hptsi gain that is + * probably 75%. This will slowly float down our outstanding + * without tampering with the cwnd. + */ + bbr->r_ctl.rc_bbr_hptsi_gain = bbr->r_ctl.bbr_rttprobe_gain_val; + bbr->r_ctl.rc_bbr_cwnd_gain = BBR_UNIT; + bbr_set_state_target(bbr, __LINE__); + if (bbr_prtt_slam_cwnd && + (bbr->rc_tp->snd_cwnd > bbr->r_ctl.rc_target_at_state)) { + bbr->rc_tp->snd_cwnd = bbr->r_ctl.rc_target_at_state; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } + } + if (ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)) <= + bbr->r_ctl.rc_target_at_state) { + /* We are at target */ + bbr->r_ctl.rc_bbr_enters_probertt = cts; + } else { + /* We need to come down to reach target before our time begins */ + bbr->r_ctl.rc_bbr_enters_probertt = 0; + } + bbr->r_ctl.rc_pe_of_prtt = bbr->r_ctl.rc_pkt_epoch; + BBR_STAT_INC(bbr_enter_probertt); + bbr_log_exit_gain(bbr, cts, 0); + bbr_log_type_statechange(bbr, cts, line); +} + +static void +bbr_check_probe_rtt_limits(struct tcp_bbr *bbr, uint32_t cts) +{ + /* + * Sanity check on probe-rtt intervals. + * In crazy situations where we are competing + * against new-reno flows with huge buffers + * our rtt-prop interval could come to dominate + * things if we can't get through a full set + * of cycles, we need to adjust it. + */ + if (bbr_can_adjust_probertt && + (bbr->rc_use_google == 0)) { + uint16_t val = 0; + uint32_t cur_rttp, fval, newval, baseval; + + /* Are we to small and go into probe-rtt to often? */ + baseval = (bbr_get_rtt(bbr, BBR_RTT_PROP) * (BBR_SUBSTATE_COUNT + 1)); + cur_rttp = roundup(baseval, USECS_IN_SECOND); + fval = bbr_filter_len_sec * USECS_IN_SECOND; + if (bbr_is_ratio == 0) { + if (fval > bbr_rtt_probe_limit) + newval = cur_rttp + (fval - bbr_rtt_probe_limit); + else + newval = cur_rttp; + } else { + int mul; + + mul = fval / bbr_rtt_probe_limit; + newval = cur_rttp * mul; + } + if (cur_rttp > bbr->r_ctl.rc_probertt_int) { + bbr->r_ctl.rc_probertt_int = cur_rttp; + reset_time_small(&bbr->r_ctl.rc_rttprop, newval); + val = 1; + } else { + /* + * No adjustments were made + * do we need to shrink it? + */ + if (bbr->r_ctl.rc_probertt_int > bbr_rtt_probe_limit) { + if (cur_rttp <= bbr_rtt_probe_limit) { + /* + * Things have calmed down lets + * shrink all the way to default + */ + bbr->r_ctl.rc_probertt_int = bbr_rtt_probe_limit; + reset_time_small(&bbr->r_ctl.rc_rttprop, + (bbr_filter_len_sec * USECS_IN_SECOND)); + cur_rttp = bbr_rtt_probe_limit; + newval = (bbr_filter_len_sec * USECS_IN_SECOND); + val = 2; + } else { + /* + * Well does some adjustment make sense? + */ + if (cur_rttp < bbr->r_ctl.rc_probertt_int) { + /* We can reduce interval time some */ + bbr->r_ctl.rc_probertt_int = cur_rttp; + reset_time_small(&bbr->r_ctl.rc_rttprop, newval); + val = 3; + } + } + } + } + if (val) + bbr_log_rtt_shrinks(bbr, cts, cur_rttp, newval, __LINE__, BBR_RTTS_RESETS_VALUES, val); + } +} + +static void +bbr_exit_probe_rtt(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t cts) +{ + /* Exit probe-rtt */ + + if (tp->snd_cwnd < bbr->r_ctl.rc_saved_cwnd) { + tp->snd_cwnd = bbr->r_ctl.rc_saved_cwnd; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } + bbr_log_exit_gain(bbr, cts, 1); + bbr->rc_hit_state_1 = 0; + bbr->r_ctl.rc_rtt_shrinks = cts; + bbr->r_ctl.last_in_probertt = cts; + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_RTTPROBE, 0); + bbr->r_ctl.bbr_lost_at_state = bbr->r_ctl.rc_lost; + bbr->r_ctl.r_app_limited_until = (ctf_flight_size(tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)) + + bbr->r_ctl.rc_delivered); + if (SEQ_GT(cts, bbr->r_ctl.rc_bbr_state_time)) { + uint32_t time_in; + + time_in = cts - bbr->r_ctl.rc_bbr_state_time; + counter_u64_add(bbr_state_time[bbr->rc_bbr_state], time_in); + } + if (bbr->rc_filled_pipe) { + /* Switch to probe_bw */ + bbr->rc_bbr_state = BBR_STATE_PROBE_BW; + bbr->rc_bbr_substate = bbr_pick_probebw_substate(bbr, cts); + bbr->r_ctl.rc_bbr_cwnd_gain = bbr_cwnd_gain; + bbr_substate_change(bbr, cts, __LINE__, 0); + bbr_log_type_statechange(bbr, cts, __LINE__); + } else { + /* Back to startup */ + bbr->rc_bbr_state = BBR_STATE_STARTUP; + bbr->r_ctl.rc_bbr_state_time = cts; + /* + * We don't want to give a complete free 3 + * measurements until we exit, so we use + * the number of pe's we were in probe-rtt + * to add to the startup_epoch. That way + * we will still retain the old state. + */ + bbr->r_ctl.rc_bbr_last_startup_epoch += (bbr->r_ctl.rc_pkt_epoch - bbr->r_ctl.rc_pe_of_prtt); + bbr->r_ctl.rc_lost_at_startup = bbr->r_ctl.rc_lost; + /* Make sure to use the lower pg when shifting back in */ + if (bbr->r_ctl.rc_lost && + bbr_use_lower_gain_in_startup && + (bbr->rc_use_google == 0)) + bbr->r_ctl.rc_bbr_hptsi_gain = bbr_startup_lower; + else + bbr->r_ctl.rc_bbr_hptsi_gain = bbr->r_ctl.rc_startup_pg; + bbr->r_ctl.rc_bbr_cwnd_gain = bbr->r_ctl.rc_startup_pg; + /* Probably not needed but set it anyway */ + bbr_set_state_target(bbr, __LINE__); + bbr_log_type_statechange(bbr, cts, __LINE__); + bbr_log_startup_event(bbr, cts, bbr->r_ctl.rc_bbr_last_startup_epoch, + bbr->r_ctl.rc_lost_at_startup, bbr_start_exit, 0); + } + bbr_check_probe_rtt_limits(bbr, cts); +} + +static int32_t inline +bbr_should_enter_probe_rtt(struct tcp_bbr *bbr, uint32_t cts) +{ + if ((bbr->rc_past_init_win == 1) && + (bbr->rc_in_persist == 0) && + (bbr_calc_time(cts, bbr->r_ctl.rc_rtt_shrinks) >= bbr->r_ctl.rc_probertt_int)) { + return (1); + } + if (bbr_can_force_probertt && + (bbr->rc_in_persist == 0) && + (TSTMP_GT(cts, bbr->r_ctl.last_in_probertt)) && + ((cts - bbr->r_ctl.last_in_probertt) > bbr->r_ctl.rc_probertt_int)) { + return (1); + } + return (0); +} + + +static int32_t +bbr_google_startup(struct tcp_bbr *bbr, uint32_t cts, int32_t pkt_epoch) +{ + uint64_t btlbw, gain; + if (pkt_epoch == 0) { + /* + * Need to be on a pkt-epoch to continue. + */ + return (0); + } + btlbw = bbr_get_full_bw(bbr); + gain = ((bbr->r_ctl.rc_bbr_lastbtlbw * + (uint64_t)bbr_start_exit) / (uint64_t)100) + bbr->r_ctl.rc_bbr_lastbtlbw; + if (btlbw >= gain) { + bbr->r_ctl.rc_bbr_last_startup_epoch = bbr->r_ctl.rc_pkt_epoch; + bbr_log_startup_event(bbr, cts, bbr->r_ctl.rc_bbr_last_startup_epoch, + bbr->r_ctl.rc_lost_at_startup, bbr_start_exit, 3); + bbr->r_ctl.rc_bbr_lastbtlbw = btlbw; + } + if ((bbr->r_ctl.rc_pkt_epoch - bbr->r_ctl.rc_bbr_last_startup_epoch) >= BBR_STARTUP_EPOCHS) + return (1); + bbr_log_startup_event(bbr, cts, bbr->r_ctl.rc_bbr_last_startup_epoch, + bbr->r_ctl.rc_lost_at_startup, bbr_start_exit, 8); + return(0); +} + +static int32_t inline +bbr_state_startup(struct tcp_bbr *bbr, uint32_t cts, int32_t epoch, int32_t pkt_epoch) +{ + /* Have we gained 25% in the last 3 packet based epoch's? */ + uint64_t btlbw, gain; + int do_exit; + int delta, rtt_gain; + + if ((bbr->rc_tp->snd_una == bbr->rc_tp->snd_max) && + (bbr_calc_time(cts, bbr->r_ctl.rc_went_idle_time) >= bbr_rtt_probe_time)) { + /* + * This qualifies as a RTT_PROBE session since we drop the + * data outstanding to nothing and waited more than + * bbr_rtt_probe_time. + */ + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_WASIDLE, 0); + bbr_set_reduced_rtt(bbr, cts, __LINE__); + } + if (bbr_should_enter_probe_rtt(bbr, cts)) { + bbr_enter_probe_rtt(bbr, cts, __LINE__); + return (0); + } + if (bbr->rc_use_google) + return (bbr_google_startup(bbr, cts, pkt_epoch)); + + if ((bbr->r_ctl.rc_lost > bbr->r_ctl.rc_lost_at_startup) && + (bbr_use_lower_gain_in_startup)) { + /* Drop to a lower gain 1.5 x since we saw loss */ + bbr->r_ctl.rc_bbr_hptsi_gain = bbr_startup_lower; + } + if (pkt_epoch == 0) { + /* + * Need to be on a pkt-epoch to continue. + */ + return (0); + } + if (bbr_rtt_gain_thresh) { + /* + * Do we allow a flow to stay + * in startup with no loss and no + * gain in rtt over a set threshold? + */ + if (bbr->r_ctl.rc_pkt_epoch_rtt && + bbr->r_ctl.startup_last_srtt && + (bbr->r_ctl.rc_pkt_epoch_rtt > bbr->r_ctl.startup_last_srtt)) { + delta = bbr->r_ctl.rc_pkt_epoch_rtt - bbr->r_ctl.startup_last_srtt; + rtt_gain = (delta * 100) / bbr->r_ctl.startup_last_srtt; + } else + rtt_gain = 0; + if ((bbr->r_ctl.startup_last_srtt == 0) || + (bbr->r_ctl.rc_pkt_epoch_rtt < bbr->r_ctl.startup_last_srtt)) + /* First time or new lower value */ + bbr->r_ctl.startup_last_srtt = bbr->r_ctl.rc_pkt_epoch_rtt; + + if ((bbr->r_ctl.rc_lost == 0) && + (rtt_gain < bbr_rtt_gain_thresh)) { + /* + * No loss, and we are under + * our gain threhold for + * increasing RTT. + */ + if (bbr->r_ctl.rc_bbr_last_startup_epoch < bbr->r_ctl.rc_pkt_epoch) + bbr->r_ctl.rc_bbr_last_startup_epoch++; + bbr_log_startup_event(bbr, cts, rtt_gain, + delta, bbr->r_ctl.startup_last_srtt, 10); + return (0); + } + } + if ((bbr->r_ctl.r_measurement_count == bbr->r_ctl.last_startup_measure) && + (bbr->r_ctl.rc_lost_at_startup == bbr->r_ctl.rc_lost) && + (!IN_RECOVERY(bbr->rc_tp->t_flags))) { + /* + * We only assess if we have a new measurment when + * we have no loss and are not in recovery. + * Drag up by one our last_startup epoch so we will hold + * the number of non-gain we have already accumulated. + */ + if (bbr->r_ctl.rc_bbr_last_startup_epoch < bbr->r_ctl.rc_pkt_epoch) + bbr->r_ctl.rc_bbr_last_startup_epoch++; + bbr_log_startup_event(bbr, cts, bbr->r_ctl.rc_bbr_last_startup_epoch, + bbr->r_ctl.rc_lost_at_startup, bbr_start_exit, 9); + return (0); + } + /* Case where we reduced the lost (bad retransmit) */ + if (bbr->r_ctl.rc_lost_at_startup > bbr->r_ctl.rc_lost) + bbr->r_ctl.rc_lost_at_startup = bbr->r_ctl.rc_lost; + bbr->r_ctl.last_startup_measure = bbr->r_ctl.r_measurement_count; + btlbw = bbr_get_full_bw(bbr); + if (bbr->r_ctl.rc_bbr_hptsi_gain == bbr_startup_lower) + gain = ((bbr->r_ctl.rc_bbr_lastbtlbw * + (uint64_t)bbr_low_start_exit) / (uint64_t)100) + bbr->r_ctl.rc_bbr_lastbtlbw; + else + gain = ((bbr->r_ctl.rc_bbr_lastbtlbw * + (uint64_t)bbr_start_exit) / (uint64_t)100) + bbr->r_ctl.rc_bbr_lastbtlbw; + do_exit = 0; + if (btlbw > bbr->r_ctl.rc_bbr_lastbtlbw) + bbr->r_ctl.rc_bbr_lastbtlbw = btlbw; + if (btlbw >= gain) { + bbr->r_ctl.rc_bbr_last_startup_epoch = bbr->r_ctl.rc_pkt_epoch; + /* Update the lost so we won't exit in next set of tests */ + bbr->r_ctl.rc_lost_at_startup = bbr->r_ctl.rc_lost; + bbr_log_startup_event(bbr, cts, bbr->r_ctl.rc_bbr_last_startup_epoch, + bbr->r_ctl.rc_lost_at_startup, bbr_start_exit, 3); + } + if ((bbr->rc_loss_exit && + (bbr->r_ctl.rc_lost > bbr->r_ctl.rc_lost_at_startup) && + (bbr->r_ctl.rc_pkt_epoch_loss_rate > bbr_startup_loss_thresh)) && + ((bbr->r_ctl.rc_pkt_epoch - bbr->r_ctl.rc_bbr_last_startup_epoch) >= BBR_STARTUP_EPOCHS)) { + /* + * If we had no gain, we had loss and that loss was above + * our threshould, the rwnd is not constrained, and we have + * had at least 3 packet epochs exit. Note that this is + * switched off by sysctl. Google does not do this by the + * way. + */ + if ((ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)) + + (2 * max(bbr->r_ctl.rc_pace_max_segs, bbr->rc_tp->t_maxseg))) <= bbr->rc_tp->snd_wnd) { + do_exit = 1; + bbr_log_startup_event(bbr, cts, bbr->r_ctl.rc_bbr_last_startup_epoch, + bbr->r_ctl.rc_lost_at_startup, bbr_start_exit, 4); + } else { + /* Just record an updated loss value */ + bbr->r_ctl.rc_lost_at_startup = bbr->r_ctl.rc_lost; + bbr_log_startup_event(bbr, cts, bbr->r_ctl.rc_bbr_last_startup_epoch, + bbr->r_ctl.rc_lost_at_startup, bbr_start_exit, 5); + } + } else + bbr->r_ctl.rc_lost_at_startup = bbr->r_ctl.rc_lost; + if (((bbr->r_ctl.rc_pkt_epoch - bbr->r_ctl.rc_bbr_last_startup_epoch) >= BBR_STARTUP_EPOCHS) || + do_exit) { + /* Return 1 to exit the startup state. */ + return (1); + } + /* Stay in startup */ + bbr_log_startup_event(bbr, cts, bbr->r_ctl.rc_bbr_last_startup_epoch, + bbr->r_ctl.rc_lost_at_startup, bbr_start_exit, 8); + return (0); +} + +static void +bbr_state_change(struct tcp_bbr *bbr, uint32_t cts, int32_t epoch, int32_t pkt_epoch, uint32_t losses) +{ + /* + * A tick occured in the rtt epoch do we need to do anything? + */ +#ifdef BBR_INVARIANTS + if ((bbr->rc_bbr_state != BBR_STATE_STARTUP) && + (bbr->rc_bbr_state != BBR_STATE_DRAIN) && + (bbr->rc_bbr_state != BBR_STATE_PROBE_RTT) && + (bbr->rc_bbr_state != BBR_STATE_IDLE_EXIT) && + (bbr->rc_bbr_state != BBR_STATE_PROBE_BW)) { + /* Debug code? */ + panic("Unknown BBR state %d?\n", bbr->rc_bbr_state); + } +#endif + if (bbr->rc_bbr_state == BBR_STATE_STARTUP) { + /* Do we exit the startup state? */ + if (bbr_state_startup(bbr, cts, epoch, pkt_epoch)) { + uint32_t time_in; + + bbr_log_startup_event(bbr, cts, bbr->r_ctl.rc_bbr_last_startup_epoch, + bbr->r_ctl.rc_lost_at_startup, bbr_start_exit, 6); + bbr->rc_filled_pipe = 1; + bbr->r_ctl.bbr_lost_at_state = bbr->r_ctl.rc_lost; + if (SEQ_GT(cts, bbr->r_ctl.rc_bbr_state_time)) { + + time_in = cts - bbr->r_ctl.rc_bbr_state_time; + counter_u64_add(bbr_state_time[bbr->rc_bbr_state], time_in); + } else + time_in = 0; + if (bbr->rc_no_pacing) + bbr->rc_no_pacing = 0; + bbr->r_ctl.rc_bbr_state_time = cts; + bbr->r_ctl.rc_bbr_hptsi_gain = bbr->r_ctl.rc_drain_pg; + bbr->rc_bbr_state = BBR_STATE_DRAIN; + bbr_set_state_target(bbr, __LINE__); + if ((bbr->rc_use_google == 0) && + bbr_slam_cwnd_in_main_drain) { + /* Here we don't have to worry about probe-rtt */ + bbr->r_ctl.rc_saved_cwnd = bbr->rc_tp->snd_cwnd; + bbr->rc_tp->snd_cwnd = bbr->r_ctl.rc_target_at_state; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } + bbr->r_ctl.rc_bbr_cwnd_gain = bbr_high_gain; + bbr_log_type_statechange(bbr, cts, __LINE__); + if (ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)) <= + bbr->r_ctl.rc_target_at_state) { + /* + * Switch to probe_bw if we are already + * there + */ + bbr->rc_bbr_substate = bbr_pick_probebw_substate(bbr, cts); + bbr_substate_change(bbr, cts, __LINE__, 0); + bbr->rc_bbr_state = BBR_STATE_PROBE_BW; + bbr_log_type_statechange(bbr, cts, __LINE__); + } + } + } else if (bbr->rc_bbr_state == BBR_STATE_IDLE_EXIT) { + uint32_t inflight; + struct tcpcb *tp; + + tp = bbr->rc_tp; + inflight = ctf_flight_size(tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + if (inflight >= bbr->r_ctl.rc_target_at_state) { + /* We have reached a flight of the cwnd target */ + bbr->rc_bbr_state = BBR_STATE_PROBE_BW; + bbr->r_ctl.rc_bbr_hptsi_gain = BBR_UNIT; + bbr->r_ctl.rc_bbr_cwnd_gain = BBR_UNIT; + bbr_set_state_target(bbr, __LINE__); + /* + * Rig it so we don't do anything crazy and + * start fresh with a new randomization. + */ + bbr->r_ctl.bbr_smallest_srtt_this_state = 0xffffffff; + bbr->rc_bbr_substate = BBR_SUB_LEVEL6; + bbr_substate_change(bbr, cts, __LINE__, 1); + } + } else if (bbr->rc_bbr_state == BBR_STATE_DRAIN) { + /* Has in-flight reached the bdp (or less)? */ + uint32_t inflight; + struct tcpcb *tp; + + tp = bbr->rc_tp; + inflight = ctf_flight_size(tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + if ((bbr->rc_use_google == 0) && + bbr_slam_cwnd_in_main_drain && + (bbr->rc_tp->snd_cwnd > bbr->r_ctl.rc_target_at_state)) { + /* + * Here we don't have to worry about probe-rtt + * re-slam it, but keep it slammed down. + */ + bbr->rc_tp->snd_cwnd = bbr->r_ctl.rc_target_at_state; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } + if (inflight <= bbr->r_ctl.rc_target_at_state) { + /* We have drained */ + bbr->rc_bbr_state = BBR_STATE_PROBE_BW; + bbr->r_ctl.bbr_lost_at_state = bbr->r_ctl.rc_lost; + if (SEQ_GT(cts, bbr->r_ctl.rc_bbr_state_time)) { + uint32_t time_in; + + time_in = cts - bbr->r_ctl.rc_bbr_state_time; + counter_u64_add(bbr_state_time[bbr->rc_bbr_state], time_in); + } + if ((bbr->rc_use_google == 0) && + bbr_slam_cwnd_in_main_drain && + (tp->snd_cwnd < bbr->r_ctl.rc_saved_cwnd)) { + /* Restore the cwnd */ + tp->snd_cwnd = bbr->r_ctl.rc_saved_cwnd; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } + /* Setup probe-rtt has being done now RRS-HERE */ + bbr->r_ctl.rc_rtt_shrinks = cts; + bbr->r_ctl.last_in_probertt = cts; + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_LEAVE_DRAIN, 0); + /* Randomly pick a sub-state */ + bbr->rc_bbr_substate = bbr_pick_probebw_substate(bbr, cts); + bbr_substate_change(bbr, cts, __LINE__, 0); + bbr_log_type_statechange(bbr, cts, __LINE__); + } + } else if (bbr->rc_bbr_state == BBR_STATE_PROBE_RTT) { + uint32_t flight; + + flight = ctf_flight_size(bbr->rc_tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + bbr->r_ctl.r_app_limited_until = (flight + bbr->r_ctl.rc_delivered); + if (((bbr->r_ctl.bbr_rttprobe_gain_val == 0) || bbr->rc_use_google) && + (bbr->rc_tp->snd_cwnd > bbr->r_ctl.rc_target_at_state)) { + /* + * We must keep cwnd at the desired MSS. + */ + bbr->rc_tp->snd_cwnd = bbr_rtt_probe_cwndtarg * (bbr->rc_tp->t_maxseg - bbr->rc_last_options); + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } else if ((bbr_prtt_slam_cwnd) && + (bbr->rc_tp->snd_cwnd > bbr->r_ctl.rc_target_at_state)) { + /* Re-slam it */ + bbr->rc_tp->snd_cwnd = bbr->r_ctl.rc_target_at_state; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 12, 0, 0, __LINE__); + } + if (bbr->r_ctl.rc_bbr_enters_probertt == 0) { + /* Has outstanding reached our target? */ + if (flight <= bbr->r_ctl.rc_target_at_state) { + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_REACHTAR, 0); + bbr->r_ctl.rc_bbr_enters_probertt = cts; + /* If time is exactly 0, be 1usec off */ + if (bbr->r_ctl.rc_bbr_enters_probertt == 0) + bbr->r_ctl.rc_bbr_enters_probertt = 1; + if (bbr->rc_use_google == 0) { + /* + * Restore any lowering that as occured to + * reach here + */ + if (bbr->r_ctl.bbr_rttprobe_gain_val) + bbr->r_ctl.rc_bbr_hptsi_gain = bbr->r_ctl.bbr_rttprobe_gain_val; + else + bbr->r_ctl.rc_bbr_hptsi_gain = BBR_UNIT; + } + } + if ((bbr->r_ctl.rc_bbr_enters_probertt == 0) && + (bbr->rc_use_google == 0) && + bbr->r_ctl.bbr_rttprobe_gain_val && + (((cts - bbr->r_ctl.rc_probertt_srttchktim) > bbr_get_rtt(bbr, bbr_drain_rtt)) || + (flight >= bbr->r_ctl.flightsize_at_drain))) { + /* + * We have doddled with our current hptsi + * gain an srtt and have still not made it + * to target, or we have increased our flight. + * Lets reduce the gain by xx% + * flooring the reduce at DRAIN (based on + * mul/div) + */ + int red; + + bbr->r_ctl.flightsize_at_drain = flight; + bbr->r_ctl.rc_probertt_srttchktim = cts; + red = max((bbr->r_ctl.bbr_rttprobe_gain_val / 10), 1); + if ((bbr->r_ctl.rc_bbr_hptsi_gain - red) > max(bbr_drain_floor, 1)) { + /* Reduce our gain again */ + bbr->r_ctl.rc_bbr_hptsi_gain -= red; + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_SHRINK_PG, 0); + } else if (bbr->r_ctl.rc_bbr_hptsi_gain > max(bbr_drain_floor, 1)) { + /* one more chance before we give up */ + bbr->r_ctl.rc_bbr_hptsi_gain = max(bbr_drain_floor, 1); + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_SHRINK_PG_FINAL, 0); + } else { + /* At the very bottom */ + bbr->r_ctl.rc_bbr_hptsi_gain = max((bbr_drain_floor-1), 1); + } + } + } + if (bbr->r_ctl.rc_bbr_enters_probertt && + (TSTMP_GT(cts, bbr->r_ctl.rc_bbr_enters_probertt)) && + ((cts - bbr->r_ctl.rc_bbr_enters_probertt) >= bbr_rtt_probe_time)) { + /* Time to exit probe RTT normally */ + bbr_exit_probe_rtt(bbr->rc_tp, bbr, cts); + } + } else if (bbr->rc_bbr_state == BBR_STATE_PROBE_BW) { + if ((bbr->rc_tp->snd_una == bbr->rc_tp->snd_max) && + (bbr_calc_time(cts, bbr->r_ctl.rc_went_idle_time) >= bbr_rtt_probe_time)) { + /* + * This qualifies as a RTT_PROBE session since we + * drop the data outstanding to nothing and waited + * more than bbr_rtt_probe_time. + */ + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_WASIDLE, 0); + bbr_set_reduced_rtt(bbr, cts, __LINE__); + } + if (bbr_should_enter_probe_rtt(bbr, cts)) { + bbr_enter_probe_rtt(bbr, cts, __LINE__); + } else { + bbr_set_probebw_gains(bbr, cts, losses); + } + } +} + +static void +bbr_check_bbr_for_state(struct tcp_bbr *bbr, uint32_t cts, int32_t line, uint32_t losses) +{ + int32_t epoch = 0; + + if ((cts - bbr->r_ctl.rc_rcv_epoch_start) >= bbr_get_rtt(bbr, BBR_RTT_PROP)) { + bbr_set_epoch(bbr, cts, line); + /* At each epoch doe lt bw sampling */ + epoch = 1; + } + bbr_state_change(bbr, cts, epoch, bbr->rc_is_pkt_epoch_now, losses); +} + +static int +bbr_do_segment_nounlock(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, int32_t drop_hdrlen, int32_t tlen, uint8_t iptos, + int32_t nxt_pkt, struct timeval *tv) +{ + int32_t thflags, retval; + uint32_t cts, lcts; + uint32_t tiwin; + struct tcpopt to; + struct tcp_bbr *bbr; + struct bbr_sendmap *rsm; + struct timeval ltv; + int32_t did_out = 0; + int32_t in_recovery; + uint16_t nsegs; + int32_t prev_state; + uint32_t lost; + + nsegs = max(1, m->m_pkthdr.lro_nsegs); + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + /* add in our stats */ + kern_prefetch(bbr, &prev_state); + prev_state = 0; + thflags = th->th_flags; + /* + * If this is either a state-changing packet or current state isn't + * established, we require a write lock on tcbinfo. Otherwise, we + * allow the tcbinfo to be in either alocked or unlocked, as the + * caller may have unnecessarily acquired a write lock due to a + * race. + */ + INP_WLOCK_ASSERT(tp->t_inpcb); + KASSERT(tp->t_state > TCPS_LISTEN, ("%s: TCPS_LISTEN", + __func__)); + KASSERT(tp->t_state != TCPS_TIME_WAIT, ("%s: TCPS_TIME_WAIT", + __func__)); + + tp->t_rcvtime = ticks; + /* + * Unscale the window into a 32-bit value. For the SYN_SENT state + * the scale is zero. + */ + tiwin = th->th_win << tp->snd_scale; +#ifdef NETFLIX_STATS + stats_voi_update_abs_ulong(tp->t_stats, VOI_TCP_FRWIN, tiwin); +#endif + /* + * Parse options on any incoming segment. + */ + tcp_dooptions(&to, (u_char *)(th + 1), + (th->th_off << 2) - sizeof(struct tcphdr), + (thflags & TH_SYN) ? TO_SYN : 0); + + if (m->m_flags & M_TSTMP) { + /* Prefer the hardware timestamp if present */ + struct timespec ts; + + mbuf_tstmp2timespec(m, &ts); + bbr->rc_tv.tv_sec = ts.tv_sec; + bbr->rc_tv.tv_usec = ts.tv_nsec / 1000; + bbr->r_ctl.rc_rcvtime = cts = tcp_tv_to_usectick(&bbr->rc_tv); + } else if (m->m_flags & M_TSTMP_LRO) { + /* Next the arrival timestamp */ + struct timespec ts; + + mbuf_tstmp2timespec(m, &ts); + bbr->rc_tv.tv_sec = ts.tv_sec; + bbr->rc_tv.tv_usec = ts.tv_nsec / 1000; + bbr->r_ctl.rc_rcvtime = cts = tcp_tv_to_usectick(&bbr->rc_tv); + } else { + /* + * Ok just get the current time. + */ + bbr->r_ctl.rc_rcvtime = lcts = cts = tcp_get_usecs(&bbr->rc_tv); + } + /* + * If echoed timestamp is later than the current time, fall back to + * non RFC1323 RTT calculation. Normalize timestamp if syncookies + * were used when this connection was established. + */ + if ((to.to_flags & TOF_TS) && (to.to_tsecr != 0)) { + to.to_tsecr -= tp->ts_offset; + if (TSTMP_GT(to.to_tsecr, tcp_tv_to_mssectick(&bbr->rc_tv))) + to.to_tsecr = 0; + } + /* + * If its the first time in we need to take care of options and + * verify we can do SACK for rack! + */ + if (bbr->r_state == 0) { + /* + * Process options only when we get SYN/ACK back. The SYN + * case for incoming connections is handled in tcp_syncache. + * According to RFC1323 the window field in a SYN (i.e., a + * or ) segment itself is never scaled. XXX + * this is traditional behavior, may need to be cleaned up. + */ + if (bbr->rc_inp == NULL) { + bbr->rc_inp = tp->t_inpcb; + } + /* + * We need to init rc_inp here since its not init'd when + * bbr_init is called + */ + if (tp->t_state == TCPS_SYN_SENT && (thflags & TH_SYN)) { + if ((to.to_flags & TOF_SCALE) && + (tp->t_flags & TF_REQ_SCALE)) { + tp->t_flags |= TF_RCVD_SCALE; + tp->snd_scale = to.to_wscale; + } + /* + * Initial send window. It will be updated with the + * next incoming segment to the scaled value. + */ + tp->snd_wnd = th->th_win; + if (to.to_flags & TOF_TS) { + tp->t_flags |= TF_RCVD_TSTMP; + tp->ts_recent = to.to_tsval; + tp->ts_recent_age = tcp_tv_to_mssectick(&bbr->rc_tv); + } + if (to.to_flags & TOF_MSS) + tcp_mss(tp, to.to_mss); + if ((tp->t_flags & TF_SACK_PERMIT) && + (to.to_flags & TOF_SACKPERM) == 0) + tp->t_flags &= ~TF_SACK_PERMIT; + if (IS_FASTOPEN(tp->t_flags)) { + if (to.to_flags & TOF_FASTOPEN) { + uint16_t mss; + + if (to.to_flags & TOF_MSS) + mss = to.to_mss; + else + if ((tp->t_inpcb->inp_vflag & INP_IPV6) != 0) + mss = TCP6_MSS; + else + mss = TCP_MSS; + tcp_fastopen_update_cache(tp, mss, + to.to_tfo_len, to.to_tfo_cookie); + } else + tcp_fastopen_disable_path(tp); + } + } + /* + * At this point we are at the initial call. Here we decide + * if we are doing RACK or not. We do this by seeing if + * TF_SACK_PERMIT is set, if not rack is *not* possible and + * we switch to the default code. + */ + if ((tp->t_flags & TF_SACK_PERMIT) == 0) { + /* Bail */ + tcp_switch_back_to_default(tp); + (*tp->t_fb->tfb_tcp_do_segment) (m, th, so, tp, drop_hdrlen, + tlen, iptos); + return (1); + } + /* Set the flag */ + bbr->r_is_v6 = (tp->t_inpcb->inp_vflag & INP_IPV6) != 0; + tcp_set_hpts(tp->t_inpcb); + sack_filter_clear(&bbr->r_ctl.bbr_sf, th->th_ack); + } + if (thflags & TH_ACK) { + /* Track ack types */ + if (to.to_flags & TOF_SACK) + BBR_STAT_INC(bbr_acks_with_sacks); + else + BBR_STAT_INC(bbr_plain_acks); + } + /* + * This is the one exception case where we set the rack state + * always. All other times (timers etc) we must have a rack-state + * set (so we assure we have done the checks above for SACK). + */ + if (bbr->r_state != tp->t_state) + bbr_set_state(tp, bbr, tiwin); + + if (SEQ_GT(th->th_ack, tp->snd_una) && (rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map)) != NULL) + kern_prefetch(rsm, &prev_state); + prev_state = bbr->r_state; + bbr->rc_ack_was_delayed = 0; + lost = bbr->r_ctl.rc_lost; + bbr->rc_is_pkt_epoch_now = 0; + if (m->m_flags & (M_TSTMP|M_TSTMP_LRO)) { + /* Get the real time into lcts and figure the real delay */ + lcts = tcp_get_usecs(<v); + if (TSTMP_GT(lcts, cts)) { + bbr->r_ctl.rc_ack_hdwr_delay = lcts - cts; + bbr->rc_ack_was_delayed = 1; + if (TSTMP_GT(bbr->r_ctl.rc_ack_hdwr_delay, + bbr->r_ctl.highest_hdwr_delay)) + bbr->r_ctl.highest_hdwr_delay = bbr->r_ctl.rc_ack_hdwr_delay; + } else { + bbr->r_ctl.rc_ack_hdwr_delay = 0; + bbr->rc_ack_was_delayed = 0; + } + } else { + bbr->r_ctl.rc_ack_hdwr_delay = 0; + bbr->rc_ack_was_delayed = 0; + } + bbr_log_ack_event(bbr, th, &to, tlen, nsegs, cts, nxt_pkt, m); + if ((thflags & TH_SYN) && (thflags & TH_FIN) && V_drop_synfin) { + retval = 0; + m_freem(m); + goto done_with_input; + } + /* + * If a segment with the ACK-bit set arrives in the SYN-SENT state + * check SEQ.ACK first as described on page 66 of RFC 793, section 3.9. + */ + if ((tp->t_state == TCPS_SYN_SENT) && (thflags & TH_ACK) && + (SEQ_LEQ(th->th_ack, tp->iss) || SEQ_GT(th->th_ack, tp->snd_max))) { + ctf_do_dropwithreset_conn(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return (1); + } + in_recovery = IN_RECOVERY(tp->t_flags); + if (tiwin > bbr->r_ctl.rc_high_rwnd) + bbr->r_ctl.rc_high_rwnd = tiwin; +#ifdef BBR_INVARIANTS + if ((tp->t_inpcb->inp_flags & INP_DROPPED) || + (tp->t_inpcb->inp_flags2 & INP_FREED)) { + panic("tp:%p bbr:%p given a dropped inp:%p", + tp, bbr, tp->t_inpcb); + } +#endif + bbr->r_ctl.rc_flight_at_input = ctf_flight_size(tp, + (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + bbr->rtt_valid = 0; + if (to.to_flags & TOF_TS) { + bbr->rc_ts_valid = 1; + bbr->r_ctl.last_inbound_ts = to.to_tsval; + } else { + bbr->rc_ts_valid = 0; + bbr->r_ctl.last_inbound_ts = 0; + } + retval = (*bbr->r_substate) (m, th, so, + tp, &to, drop_hdrlen, + tlen, tiwin, thflags, nxt_pkt); +#ifdef BBR_INVARIANTS + if ((retval == 0) && + (tp->t_inpcb == NULL)) { + panic("retval:%d tp:%p t_inpcb:NULL state:%d", + retval, tp, prev_state); + } +#endif + if (nxt_pkt == 0) + BBR_STAT_INC(bbr_rlock_left_ret0); + else + BBR_STAT_INC(bbr_rlock_left_ret1); + if (retval == 0) { + /* + * If retval is 1 the tcb is unlocked and most likely the tp + * is gone. + */ + INP_WLOCK_ASSERT(tp->t_inpcb); + tcp_bbr_xmit_timer_commit(bbr, tp, cts); + if (bbr->rc_is_pkt_epoch_now) + bbr_set_pktepoch(bbr, cts, __LINE__); + bbr_check_bbr_for_state(bbr, cts, __LINE__, (bbr->r_ctl.rc_lost - lost)); + if (nxt_pkt == 0) { + if (bbr->r_wanted_output != 0) { + bbr->rc_output_starts_timer = 0; + did_out = 1; + (void)tp->t_fb->tfb_tcp_output(tp); + } else + bbr_start_hpts_timer(bbr, tp, cts, 6, 0, 0); + } + if ((nxt_pkt == 0) && + ((bbr->r_ctl.rc_hpts_flags & PACE_TMR_MASK) == 0) && + (SEQ_GT(tp->snd_max, tp->snd_una) || + (tp->t_flags & TF_DELACK) || + ((tcp_always_keepalive || bbr->rc_inp->inp_socket->so_options & SO_KEEPALIVE) && + (tp->t_state <= TCPS_CLOSING)))) { + /* + * We could not send (probably in the hpts but + * stopped the timer)? + */ + if ((tp->snd_max == tp->snd_una) && + ((tp->t_flags & TF_DELACK) == 0) && + (bbr->rc_inp->inp_in_hpts) && + (bbr->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT)) { + /* + * keep alive not needed if we are hptsi + * output yet + */ + ; + } else { + if (bbr->rc_inp->inp_in_hpts) { + tcp_hpts_remove(bbr->rc_inp, HPTS_REMOVE_OUTPUT); + if ((bbr->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) && + (TSTMP_GT(lcts, bbr->rc_pacer_started))) { + uint32_t del; + + del = lcts - bbr->rc_pacer_started; + if (del > bbr->r_ctl.rc_last_delay_val) { + BBR_STAT_INC(bbr_force_timer_start); + bbr->r_ctl.rc_last_delay_val -= del; + bbr->rc_pacer_started = lcts; + } else { + /* We are late */ + BBR_STAT_INC(bbr_force_output); + (void)tp->t_fb->tfb_tcp_output(tp); + } + } + } + bbr_start_hpts_timer(bbr, tp, cts, 8, bbr->r_ctl.rc_last_delay_val, + 0); + } + } else if ((bbr->rc_output_starts_timer == 0) && (nxt_pkt == 0)) { + /* Do we have the correct timer running? */ + bbr_timer_audit(tp, bbr, lcts, &so->so_snd); + } + /* Do we have a new state */ + if (bbr->r_state != tp->t_state) + bbr_set_state(tp, bbr, tiwin); +done_with_input: + bbr_log_doseg_done(bbr, cts, nxt_pkt, did_out); + if (did_out) + bbr->r_wanted_output = 0; +#ifdef BBR_INVARIANTS + if (tp->t_inpcb == NULL) { + panic("OP:%d retval:%d tp:%p t_inpcb:NULL state:%d", + did_out, + retval, tp, prev_state); + } +#endif + } + return (retval); +} + +static void +bbr_log_type_hrdwtso(struct tcpcb *tp, struct tcp_bbr *bbr, int len, int mod, int what_we_can_send) +{ + if (tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + struct timeval tv; + uint32_t cts; + + cts = tcp_get_usecs(&tv); + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + log.u_bbr.flex1 = bbr->r_ctl.rc_pace_min_segs; + log.u_bbr.flex2 = what_we_can_send; + log.u_bbr.flex3 = bbr->r_ctl.rc_pace_max_segs; + log.u_bbr.flex4 = len; + log.u_bbr.flex5 = 0; + log.u_bbr.flex7 = mod; + log.u_bbr.flex8 = 1; + TCP_LOG_EVENTP(tp, NULL, + &tp->t_inpcb->inp_socket->so_rcv, + &tp->t_inpcb->inp_socket->so_snd, + TCP_HDWR_TLS, 0, + 0, &log, false, &tv); + } +} + +static void +bbr_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, + struct tcpcb *tp, int32_t drop_hdrlen, int32_t tlen, uint8_t iptos) +{ + struct timeval tv; + int retval; + + /* First lets see if we have old packets */ + if (tp->t_in_pkt) { + if (ctf_do_queued_segments(so, tp, 1)) { + m_freem(m); + return; + } + } + if (m->m_flags & M_TSTMP_LRO) { + tv.tv_sec = m->m_pkthdr.rcv_tstmp /1000000000; + tv.tv_usec = (m->m_pkthdr.rcv_tstmp % 1000000000)/1000; + } else { + /* Should not be should we kassert instead? */ + tcp_get_usecs(&tv); + } + retval = bbr_do_segment_nounlock(m, th, so, tp, + drop_hdrlen, tlen, iptos, 0, &tv); + if (retval == 0) + INP_WUNLOCK(tp->t_inpcb); +} + +/* + * Return how much data can be sent without violating the + * cwnd or rwnd. + */ + +static inline uint32_t +bbr_what_can_we_send(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t sendwin, + uint32_t avail, int32_t sb_offset, uint32_t cts) +{ + uint32_t len; + + if (ctf_outstanding(tp) >= tp->snd_wnd) { + /* We never want to go over our peers rcv-window */ + len = 0; + } else { + uint32_t flight; + + flight = ctf_flight_size(tp, (bbr->r_ctl.rc_sacked + bbr->r_ctl.rc_lost_bytes)); + if (flight >= sendwin) { + /* + * We have in flight what we are allowed by cwnd (if + * it was rwnd blocking it would have hit above out + * >= tp->snd_wnd). + */ + return (0); + } + len = sendwin - flight; + if ((len + ctf_outstanding(tp)) > tp->snd_wnd) { + /* We would send too much (beyond the rwnd) */ + len = tp->snd_wnd - ctf_outstanding(tp); + } + if ((len + sb_offset) > avail) { + /* + * We don't have that much in the SB, how much is + * there? + */ + len = avail - sb_offset; + } + } + return (len); +} + +static inline void +bbr_do_error_accounting(struct tcpcb *tp, struct tcp_bbr *bbr, struct bbr_sendmap *rsm, int32_t len, int32_t error) +{ +#ifdef NETFLIX_STATS + TCPSTAT_INC(tcps_sndpack_error); + TCPSTAT_ADD(tcps_sndbyte_error, len); +#endif +} + +static inline void +bbr_do_send_accounting(struct tcpcb *tp, struct tcp_bbr *bbr, struct bbr_sendmap *rsm, int32_t len, int32_t error) +{ + if (error) { + bbr_do_error_accounting(tp, bbr, rsm, len, error); + return; + } + if ((tp->t_flags & TF_FORCEDATA) && len == 1) { + /* Window probe */ + TCPSTAT_INC(tcps_sndprobe); +#ifdef NETFLIX_STATS + stats_voi_update_abs_u32(tp->t_stats, + VOI_TCP_RETXPB, len); +#endif + } else if (rsm) { + if (rsm->r_flags & BBR_TLP) { + /* + * TLP should not count in retran count, but in its + * own bin + */ +#ifdef NETFLIX_STATS + tp->t_sndtlppack++; + tp->t_sndtlpbyte += len; + TCPSTAT_INC(tcps_tlpresends); + TCPSTAT_ADD(tcps_tlpresend_bytes, len); +#endif + } else { + /* Retransmit */ + tp->t_sndrexmitpack++; + TCPSTAT_INC(tcps_sndrexmitpack); + TCPSTAT_ADD(tcps_sndrexmitbyte, len); +#ifdef NETFLIX_STATS + stats_voi_update_abs_u32(tp->t_stats, VOI_TCP_RETXPB, + len); +#endif + } + /* + * Logs in 0 - 8, 8 is all non probe_bw states 0-7 is + * sub-state + */ + counter_u64_add(bbr_state_lost[rsm->r_bbr_state], len); + if (bbr->rc_bbr_state != BBR_STATE_PROBE_BW) { + /* Non probe_bw log in 1, 2, or 4. */ + counter_u64_add(bbr_state_resend[bbr->rc_bbr_state], len); + } else { + /* + * Log our probe state 3, and log also 5-13 to show + * us the recovery sub-state for the send. This + * means that 3 == (5+6+7+8+9+10+11+12+13) + */ + counter_u64_add(bbr_state_resend[BBR_STATE_PROBE_BW], len); + counter_u64_add(bbr_state_resend[(bbr_state_val(bbr) + 5)], len); + } + /* Place in both 16's the totals of retransmitted */ + counter_u64_add(bbr_state_lost[16], len); + counter_u64_add(bbr_state_resend[16], len); + /* Place in 17's the total sent */ + counter_u64_add(bbr_state_resend[17], len); + counter_u64_add(bbr_state_lost[17], len); + + } else { + /* New sends */ + TCPSTAT_INC(tcps_sndpack); + TCPSTAT_ADD(tcps_sndbyte, len); + /* Place in 17's the total sent */ + counter_u64_add(bbr_state_resend[17], len); + counter_u64_add(bbr_state_lost[17], len); +#ifdef NETFLIX_STATS + stats_voi_update_abs_u64(tp->t_stats, VOI_TCP_TXPB, + len); +#endif + } +} + +static void +bbr_cwnd_limiting(struct tcpcb *tp, struct tcp_bbr *bbr, uint32_t in_level) +{ + if (bbr->rc_filled_pipe && bbr_target_cwnd_mult_limit && (bbr->rc_use_google == 0)) { + /* + * Limit the cwnd to not be above N x the target plus whats + * is outstanding. The target is based on the current b/w + * estimate. + */ + uint32_t target; + + target = bbr_get_target_cwnd(bbr, bbr_get_bw(bbr), BBR_UNIT); + target += ctf_outstanding(tp); + target *= bbr_target_cwnd_mult_limit; + if (tp->snd_cwnd > target) + tp->snd_cwnd = target; + bbr_log_type_cwndupd(bbr, 0, 0, 0, 10, 0, 0, __LINE__); + } +} + +static int +bbr_window_update_needed(struct tcpcb *tp, struct socket *so, uint32_t recwin, int32_t maxseg) +{ + /* + * "adv" is the amount we could increase the window, taking into + * account that we are limited by TCP_MAXWIN << tp->rcv_scale. + */ + uint32_t adv; + int32_t oldwin; + + adv = min(recwin, TCP_MAXWIN << tp->rcv_scale); + if (SEQ_GT(tp->rcv_adv, tp->rcv_nxt)) { + oldwin = (tp->rcv_adv - tp->rcv_nxt); + adv -= oldwin; + } else + oldwin = 0; + + /* + * If the new window size ends up being the same as the old size + * when it is scaled, then don't force a window update. + */ + if (oldwin >> tp->rcv_scale == (adv + oldwin) >> tp->rcv_scale) + return (0); + + if (adv >= (2 * maxseg) && + (adv >= (so->so_rcv.sb_hiwat / 4) || + recwin <= (so->so_rcv.sb_hiwat / 8) || + so->so_rcv.sb_hiwat <= 8 * maxseg)) { + return (1); + } + if (2 * adv >= (int32_t) so->so_rcv.sb_hiwat) + return (1); + return (0); +} + +/* + * Return 0 on success and a errno on failure to send. + * Note that a 0 return may not mean we sent anything + * if the TCB was on the hpts. A non-zero return + * does indicate the error we got from ip[6]_output. + */ +static int +bbr_output_wtime(struct tcpcb *tp, const struct timeval *tv) +{ + struct socket *so; + int32_t len; + uint32_t cts; + uint32_t recwin, sendwin; + int32_t sb_offset; + int32_t flags, abandon, error = 0; + struct tcp_log_buffer *lgb = NULL; + struct mbuf *m; + struct mbuf *mb; + uint32_t if_hw_tsomaxsegcount = 0; + uint32_t if_hw_tsomaxsegsize = 0; + uint32_t if_hw_tsomax = 0; + struct ip *ip = NULL; +#ifdef TCPDEBUG + struct ipovly *ipov = NULL; +#endif + struct tcp_bbr *bbr; + struct tcphdr *th; +#ifdef NETFLIX_TCPOUDP + struct udphdr *udp = NULL; +#endif + u_char opt[TCP_MAXOLEN]; + unsigned ipoptlen, optlen, hdrlen; +#ifdef NETFLIX_TCPOUDP + unsigned ulen; +#endif + uint32_t bbr_seq; + uint32_t delay_calc=0; + uint8_t doing_tlp = 0; + uint8_t local_options; +#ifdef BBR_INVARIANTS + uint8_t doing_retran_from = 0; + uint8_t picked_up_retran = 0; +#endif + uint8_t wanted_cookie = 0; + uint8_t more_to_rxt=0; + int32_t prefetch_so_done = 0; + int32_t prefetch_rsm = 0; + uint32_t what_we_can = 0; + uint32_t tot_len = 0; + uint32_t rtr_cnt = 0; + uint32_t maxseg, pace_max_segs, p_maxseg; + int32_t csum_flags; + int32_t hw_tls; +#if defined(IPSEC) || defined(IPSEC_SUPPORT) + unsigned ipsec_optlen = 0; + +#endif + volatile int32_t sack_rxmit; + struct bbr_sendmap *rsm = NULL; + int32_t tso, mtu; + int force_tso = 0; + struct tcpopt to; + int32_t slot = 0; + struct inpcb *inp; + struct sockbuf *sb; + uint32_t hpts_calling; +#ifdef INET6 + struct ip6_hdr *ip6 = NULL; + int32_t isipv6; +#endif + uint8_t app_limited = BBR_JR_SENT_DATA; + uint8_t filled_all = 0; + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + /* We take a cache hit here */ + memcpy(&bbr->rc_tv, tv, sizeof(struct timeval)); + cts = tcp_tv_to_usectick(&bbr->rc_tv); + inp = bbr->rc_inp; + so = inp->inp_socket; + sb = &so->so_snd; +#ifdef KERN_TLS + if (sb->sb_flags & SB_TLS_IFNET) + hw_tls = 1; + else +#endif + hw_tls = 0; + kern_prefetch(sb, &maxseg); + maxseg = tp->t_maxseg - bbr->rc_last_options; + if (bbr_minseg(bbr) < maxseg) { + tcp_bbr_tso_size_check(bbr, cts); + } + /* Remove any flags that indicate we are pacing on the inp */ + pace_max_segs = bbr->r_ctl.rc_pace_max_segs; + p_maxseg = min(maxseg, pace_max_segs); + INP_WLOCK_ASSERT(inp); +#ifdef TCP_OFFLOAD + if (tp->t_flags & TF_TOE) + return (tcp_offload_output(tp)); +#endif + +#ifdef INET6 + if (bbr->r_state) { + /* Use the cache line loaded if possible */ + isipv6 = bbr->r_is_v6; + } else { + isipv6 = (inp->inp_vflag & INP_IPV6) != 0; + } +#endif + if (((bbr->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) == 0) && + inp->inp_in_hpts) { + /* + * We are on the hpts for some timer but not hptsi output. + * Possibly remove from the hpts so we can send/recv etc. + */ + if ((tp->t_flags & TF_ACKNOW) == 0) { + /* + * No immediate demand right now to send an ack, but + * the user may have read, making room for new data + * (a window update). If so we may want to cancel + * whatever timer is running (KEEP/DEL-ACK?) and + * continue to send out a window update. Or we may + * have gotten more data into the socket buffer to + * send. + */ + recwin = min(max(sbspace(&so->so_rcv), 0), + TCP_MAXWIN << tp->rcv_scale); + if ((bbr_window_update_needed(tp, so, recwin, maxseg) == 0) && + ((sbavail(sb) + ((tcp_outflags[tp->t_state] & TH_FIN) ? 1 : 0)) <= + (tp->snd_max - tp->snd_una))) { + /* + * Nothing new to send and no window update + * is needed to send. Lets just return and + * let the timer-run off. + */ + return (0); + } + } + tcp_hpts_remove(inp, HPTS_REMOVE_OUTPUT); + bbr_timer_cancel(bbr, __LINE__, cts); + } + if (bbr->r_ctl.rc_last_delay_val) { + /* Calculate a rough delay for early escape to sending */ + if (SEQ_GT(cts, bbr->rc_pacer_started)) + delay_calc = cts - bbr->rc_pacer_started; + if (delay_calc >= bbr->r_ctl.rc_last_delay_val) + delay_calc -= bbr->r_ctl.rc_last_delay_val; + else + delay_calc = 0; + } + /* Mark that we have called bbr_output(). */ + if ((bbr->r_timer_override) || + (tp->t_flags & TF_FORCEDATA) || + (tp->t_state < TCPS_ESTABLISHED)) { + /* Timeouts or early states are exempt */ + if (inp->inp_in_hpts) + tcp_hpts_remove(inp, HPTS_REMOVE_OUTPUT); + } else if (inp->inp_in_hpts) { + if ((bbr->r_ctl.rc_last_delay_val) && + (bbr->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) && + delay_calc) { + /* + * We were being paced for output and the delay has + * already exceeded when we were supposed to be + * called, lets go ahead and pull out of the hpts + * and call output. + */ + counter_u64_add(bbr_out_size[TCP_MSS_ACCT_LATE], 1); + bbr->r_ctl.rc_last_delay_val = 0; + tcp_hpts_remove(inp, HPTS_REMOVE_OUTPUT); + } else if (tp->t_state == TCPS_CLOSED) { + bbr->r_ctl.rc_last_delay_val = 0; + tcp_hpts_remove(inp, HPTS_REMOVE_OUTPUT); + } else { + /* + * On the hpts, you shall not pass! even if ACKNOW + * is on, we will when the hpts fires, unless of + * course we are overdue. + */ + counter_u64_add(bbr_out_size[TCP_MSS_ACCT_INPACE], 1); + return (0); + } + } + bbr->rc_cwnd_limited = 0; + if (bbr->r_ctl.rc_last_delay_val) { + /* recalculate the real delay and deal with over/under */ + if (SEQ_GT(cts, bbr->rc_pacer_started)) + delay_calc = cts - bbr->rc_pacer_started; + else + delay_calc = 0; + if (delay_calc >= bbr->r_ctl.rc_last_delay_val) + /* Setup the delay which will be added in */ + delay_calc -= bbr->r_ctl.rc_last_delay_val; + else { + /* + * We are early setup to adjust + * our slot time. + */ + bbr->r_ctl.rc_agg_early += (bbr->r_ctl.rc_last_delay_val - delay_calc); + bbr->r_ctl.rc_last_delay_val = 0; + bbr->r_agg_early_set = 1; + if (bbr->r_ctl.rc_hptsi_agg_delay) { + if (bbr->r_ctl.rc_hptsi_agg_delay >= bbr->r_ctl.rc_agg_early) { + /* Nope our previous late cancels out the early */ + bbr->r_ctl.rc_hptsi_agg_delay -= bbr->r_ctl.rc_agg_early; + bbr->r_agg_early_set = 0; + bbr->r_ctl.rc_agg_early = 0; + } else { + bbr->r_ctl.rc_agg_early -= bbr->r_ctl.rc_hptsi_agg_delay; + bbr->r_ctl.rc_hptsi_agg_delay = 0; + } + } + bbr_log_pacing_delay_calc(bbr, inp->inp_hpts_calls, + bbr->r_ctl.rc_agg_early, cts, 3, 0, + bbr->r_agg_early_set, 3); + BBR_STAT_INC(bbr_early); + delay_calc = 0; + } + } else { + /* We were not delayed due to hptsi */ + if (bbr->r_agg_early_set) + bbr->r_ctl.rc_agg_early = 0; + bbr->r_agg_early_set = 0; + delay_calc = 0; + } + if (delay_calc) { + /* + * We had a hptsi delay which means we are falling behind on + * sending at the expected rate. Calculate an extra amount + * of data we can send, if any, to put us back on track. + */ + if ((bbr->r_ctl.rc_hptsi_agg_delay + delay_calc) < bbr->r_ctl.rc_hptsi_agg_delay) + bbr->r_ctl.rc_hptsi_agg_delay = 0xffffffff; + else + bbr->r_ctl.rc_hptsi_agg_delay += delay_calc; + } + sendwin = min(tp->snd_wnd, tp->snd_cwnd); + if ((tp->snd_una == tp->snd_max) && + (bbr->rc_bbr_state != BBR_STATE_IDLE_EXIT) && + (sbavail(sb))) { + /* + * Ok we have been idle with nothing outstanding + * we possibly need to start fresh with either a new + * suite of states or a fast-ramp up. + */ + bbr_restart_after_idle(bbr, + cts, bbr_calc_time(cts, bbr->r_ctl.rc_went_idle_time)); + } + /* + * Now was there a hptsi delay where we are behind? We only count + * being behind if: a) We are not in recovery. b) There was a delay. + * c) We had room to send something. + * + */ + hpts_calling = inp->inp_hpts_calls; + inp->inp_hpts_calls = 0; + if (bbr->r_ctl.rc_hpts_flags & PACE_TMR_MASK) { + if (bbr_process_timers(tp, bbr, cts, hpts_calling)) { + counter_u64_add(bbr_out_size[TCP_MSS_ACCT_ATIMER], 1); + return (0); + } + } + bbr->rc_inp->inp_flags2 &= ~INP_MBUF_QUEUE_READY; + if (hpts_calling && + (bbr->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT)) { + bbr->r_ctl.rc_last_delay_val = 0; + } + bbr->r_timer_override = 0; + bbr->r_wanted_output = 0; + /* + * For TFO connections in SYN_RECEIVED, only allow the initial + * SYN|ACK and those sent by the retransmit timer. + */ + if (IS_FASTOPEN(tp->t_flags) && + ((tp->t_state == TCPS_SYN_RECEIVED) || + (tp->t_state == TCPS_SYN_SENT)) && + SEQ_GT(tp->snd_max, tp->snd_una) && /* inital SYN or SYN|ACK sent */ + (tp->t_rxtshift == 0)) { /* not a retransmit */ + return (0); + } + /* + * Before sending anything check for a state update. For hpts + * calling without input this is important. If its input calling + * then this was already done. + */ + if (bbr->rc_use_google == 0) + bbr_check_bbr_for_state(bbr, cts, __LINE__, 0); +again: + /* + * If we've recently taken a timeout, snd_max will be greater than + * snd_max. BBR in general does not pay much attention to snd_nxt + * for historic reasons the persist timer still uses it. This means + * we have to look at it. All retransmissions that are not persits + * use the rsm that needs to be sent so snd_nxt is ignored. At the + * end of this routine we pull snd_nxt always up to snd_max. + */ + doing_tlp = 0; +#ifdef BBR_INVARIANTS + doing_retran_from = picked_up_retran = 0; +#endif + error = 0; + tso = 0; + slot = 0; + mtu = 0; + sendwin = min(tp->snd_wnd, tp->snd_cwnd); + sb_offset = tp->snd_max - tp->snd_una; + flags = tcp_outflags[tp->t_state]; + sack_rxmit = 0; + len = 0; + rsm = NULL; + if (flags & TH_RST) { + SOCKBUF_LOCK(sb); + goto send; + } +recheck_resend: + while (bbr->r_ctl.rc_free_cnt < bbr_min_req_free) { + /* We need to always have one in reserve */ + rsm = bbr_alloc(bbr); + if (rsm == NULL) { + error = ENOMEM; + /* Lie to get on the hpts */ + tot_len = tp->t_maxseg; + if (hpts_calling) + /* Retry in a ms */ + slot = 1001; + goto just_return_nolock; + } + TAILQ_INSERT_TAIL(&bbr->r_ctl.rc_free, rsm, r_next); + bbr->r_ctl.rc_free_cnt++; + rsm = NULL; + } + /* What do we send, a resend? */ + if (bbr->r_ctl.rc_resend == NULL) { + /* Check for rack timeout */ + bbr->r_ctl.rc_resend = bbr_check_recovery_mode(tp, bbr, cts); + if (bbr->r_ctl.rc_resend) { +#ifdef BBR_INVARIANTS + picked_up_retran = 1; +#endif + bbr_cong_signal(tp, NULL, CC_NDUPACK, bbr->r_ctl.rc_resend); + } + } + if (bbr->r_ctl.rc_resend) { + rsm = bbr->r_ctl.rc_resend; +#ifdef BBR_INVARIANTS + doing_retran_from = 1; +#endif + /* Remove any TLP flags its a RACK or T-O */ + rsm->r_flags &= ~BBR_TLP; + bbr->r_ctl.rc_resend = NULL; + if (SEQ_LT(rsm->r_start, tp->snd_una)) { +#ifdef BBR_INVARIANTS + panic("Huh, tp:%p bbr:%p rsm:%p start:%u < snd_una:%u\n", + tp, bbr, rsm, rsm->r_start, tp->snd_una); + goto recheck_resend; +#else + /* TSNH */ + rsm = NULL; + goto recheck_resend; +#endif + } + rtr_cnt++; + if (rsm->r_flags & BBR_HAS_SYN) { + /* Only retransmit a SYN by itself */ + len = 0; + if ((flags & TH_SYN) == 0) { + /* Huh something is wrong */ + rsm->r_start++; + if (rsm->r_start == rsm->r_end) { + /* Clean it up, somehow we missed the ack? */ + bbr_log_syn(tp, NULL); + } else { + /* TFO with data? */ + rsm->r_flags &= ~BBR_HAS_SYN; + len = rsm->r_end - rsm->r_start; + } + } else { + /* Retransmitting SYN */ + rsm = NULL; + SOCKBUF_LOCK(sb); + goto send; + } + } else + len = rsm->r_end - rsm->r_start; + if ((bbr->rc_resends_use_tso == 0) && +#ifdef KERN_TLS + ((sb->sb_flags & SB_TLS_IFNET) == 0) && +#endif + (len > maxseg)) { + len = maxseg; + more_to_rxt = 1; + } + sb_offset = rsm->r_start - tp->snd_una; + if (len > 0) { + sack_rxmit = 1; + TCPSTAT_INC(tcps_sack_rexmits); + TCPSTAT_ADD(tcps_sack_rexmit_bytes, + min(len, maxseg)); + } else { + /* I dont think this can happen */ + rsm = NULL; + goto recheck_resend; + } + BBR_STAT_INC(bbr_resends_set); + } else if (bbr->r_ctl.rc_tlp_send) { + /* + * Tail loss probe + */ + doing_tlp = 1; + rsm = bbr->r_ctl.rc_tlp_send; + bbr->r_ctl.rc_tlp_send = NULL; + sack_rxmit = 1; + len = rsm->r_end - rsm->r_start; + rtr_cnt++; + if ((bbr->rc_resends_use_tso == 0) && (len > maxseg)) + len = maxseg; + + if (SEQ_GT(tp->snd_una, rsm->r_start)) { +#ifdef BBR_INVARIANTS + panic("tp:%p bbc:%p snd_una:%u rsm:%p r_start:%u", + tp, bbr, tp->snd_una, rsm, rsm->r_start); +#else + /* TSNH */ + rsm = NULL; + goto recheck_resend; +#endif + } + sb_offset = rsm->r_start - tp->snd_una; + BBR_STAT_INC(bbr_tlp_set); + } + /* + * Enforce a connection sendmap count limit if set + * as long as we are not retransmiting. + */ + if ((rsm == NULL) && + (bbr_tcp_map_entries_limit > 0) && + (bbr->r_ctl.rc_num_maps_alloced >= bbr_tcp_map_entries_limit)) { + BBR_STAT_INC(bbr_alloc_limited); + if (!bbr->alloc_limit_reported) { + bbr->alloc_limit_reported = 1; + BBR_STAT_INC(bbr_alloc_limited_conns); + } + goto just_return_nolock; + } +#ifdef BBR_INVARIANTS + if (rsm && SEQ_LT(rsm->r_start, tp->snd_una)) { + panic("tp:%p bbr:%p rsm:%p sb_offset:%u len:%u", + tp, bbr, rsm, sb_offset, len); + } +#endif + /* + * Get standard flags, and add SYN or FIN if requested by 'hidden' + * state flags. + */ + if (tp->t_flags & TF_NEEDFIN && (rsm == NULL)) + flags |= TH_FIN; + if (tp->t_flags & TF_NEEDSYN) + flags |= TH_SYN; + + if (rsm && (rsm->r_flags & BBR_HAS_FIN)) { + /* we are retransmitting the fin */ + len--; + if (len) { + /* + * When retransmitting data do *not* include the + * FIN. This could happen from a TLP probe if we + * allowed data with a FIN. + */ + flags &= ~TH_FIN; + } + } else if (rsm) { + if (flags & TH_FIN) + flags &= ~TH_FIN; + } + if ((sack_rxmit == 0) && (prefetch_rsm == 0)) { + void *end_rsm; + + end_rsm = TAILQ_LAST_FAST(&bbr->r_ctl.rc_tmap, bbr_sendmap, r_tnext); + if (end_rsm) + kern_prefetch(end_rsm, &prefetch_rsm); + prefetch_rsm = 1; + } + SOCKBUF_LOCK(sb); + /* + * If in persist timeout with window of 0, send 1 byte. Otherwise, + * if window is small but nonzero and time TF_SENTFIN expired, we + * will send what we can and go to transmit state. + */ + if (tp->t_flags & TF_FORCEDATA) { + if ((sendwin == 0) || (sendwin <= (tp->snd_max - tp->snd_una))) { + /* + * If we still have some data to send, then clear + * the FIN bit. Usually this would happen below + * when it realizes that we aren't sending all the + * data. However, if we have exactly 1 byte of + * unsent data, then it won't clear the FIN bit + * below, and if we are in persist state, we wind up + * sending the packet without recording that we sent + * the FIN bit. + * + * We can't just blindly clear the FIN bit, because + * if we don't have any more data to send then the + * probe will be the FIN itself. + */ + if (sb_offset < sbused(sb)) + flags &= ~TH_FIN; + sendwin = 1; + } else { + if ((bbr->rc_in_persist != 0) && + (tp->snd_wnd >= min((bbr->r_ctl.rc_high_rwnd/2), + bbr_minseg(bbr)))) { + /* Exit persists if there is space */ + bbr_exit_persist(tp, bbr, cts, __LINE__); + } + if (rsm == NULL) { + /* + * If we are dropping persist mode then we + * need to correct sb_offset if not a + * retransmit. + */ + sb_offset = tp->snd_max - tp->snd_una; + } + } + } + /* + * If snd_nxt == snd_max and we have transmitted a FIN, the + * sb_offset will be > 0 even if so_snd.sb_cc is 0, resulting in a + * negative length. This can also occur when TCP opens up its + * congestion window while receiving additional duplicate acks after + * fast-retransmit because TCP will reset snd_nxt to snd_max after + * the fast-retransmit. + * + * In the normal retransmit-FIN-only case, however, snd_nxt will be + * set to snd_una, the sb_offset will be 0, and the length may wind + * up 0. + * + * If sack_rxmit is true we are retransmitting from the scoreboard + * in which case len is already set. + */ + if (sack_rxmit == 0) { + uint32_t avail; + + avail = sbavail(sb); + if (SEQ_GT(tp->snd_max, tp->snd_una)) + sb_offset = tp->snd_max - tp->snd_una; + else + sb_offset = 0; + if (bbr->rc_tlp_new_data) { + /* TLP is forcing out new data */ + uint32_t tlplen; + + doing_tlp = 1; + tlplen = maxseg; + + if (tlplen > (uint32_t)(avail - sb_offset)) { + tlplen = (uint32_t)(avail - sb_offset); + } + if (tlplen > tp->snd_wnd) { + len = tp->snd_wnd; + } else { + len = tlplen; + } + bbr->rc_tlp_new_data = 0; + } else { + what_we_can = len = bbr_what_can_we_send(tp, bbr, sendwin, avail, sb_offset, cts); + if ((len < p_maxseg) && + (bbr->rc_in_persist == 0) && + (ctf_outstanding(tp) >= (2 * p_maxseg)) && + ((avail - sb_offset) >= p_maxseg)) { + /* + * We are not completing whats in the socket + * buffer (i.e. there is at least a segment + * waiting to send) and we have 2 or more + * segments outstanding. There is no sense + * of sending a little piece. Lets defer and + * and wait until we can send a whole + * segment. + */ + len = 0; + } + if ((tp->t_flags & TF_FORCEDATA) && (bbr->rc_in_persist)) { + /* + * We are in persists, figure out if + * a retransmit is available (maybe the previous + * persists we sent) or if we have to send new + * data. + */ + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map); + if (rsm) { + len = rsm->r_end - rsm->r_start; + if (rsm->r_flags & BBR_HAS_FIN) + len--; + if ((bbr->rc_resends_use_tso == 0) && (len > maxseg)) + len = maxseg; + if (len > 1) + BBR_STAT_INC(bbr_persist_reneg); + /* + * XXXrrs we could force the len to + * 1 byte here to cause the chunk to + * split apart.. but that would then + * mean we always retransmit it as + * one byte even after the window + * opens. + */ + sack_rxmit = 1; + sb_offset = rsm->r_start - tp->snd_una; + } else { + /* + * First time through in persists or peer + * acked our one byte. Though we do have + * to have something in the sb. + */ + len = 1; + sb_offset = 0; + if (avail == 0) + len = 0; + } + } + } + } + if (prefetch_so_done == 0) { + kern_prefetch(so, &prefetch_so_done); + prefetch_so_done = 1; + } + /* + * Lop off SYN bit if it has already been sent. However, if this is + * SYN-SENT state and if segment contains data and if we don't know + * that foreign host supports TAO, suppress sending segment. + */ + if ((flags & TH_SYN) && (rsm == NULL) && + SEQ_GT(tp->snd_max, tp->snd_una)) { + if (tp->t_state != TCPS_SYN_RECEIVED) + flags &= ~TH_SYN; + /* + * When sending additional segments following a TFO SYN|ACK, + * do not include the SYN bit. + */ + if (IS_FASTOPEN(tp->t_flags) && + (tp->t_state == TCPS_SYN_RECEIVED)) + flags &= ~TH_SYN; + sb_offset--, len++; + if (sbavail(sb) == 0) + len = 0; + } else if ((flags & TH_SYN) && rsm) { + /* + * Subtract one from the len for the SYN being + * retransmitted. + */ + len--; + } + /* + * Be careful not to send data and/or FIN on SYN segments. This + * measure is needed to prevent interoperability problems with not + * fully conformant TCP implementations. + */ + if ((flags & TH_SYN) && (tp->t_flags & TF_NOOPT)) { + len = 0; + flags &= ~TH_FIN; + } + /* + * On TFO sockets, ensure no data is sent in the following cases: + * + * - When retransmitting SYN|ACK on a passively-created socket + * - When retransmitting SYN on an actively created socket + * - When sending a zero-length cookie (cookie request) on an + * actively created socket + * - When the socket is in the CLOSED state (RST is being sent) + */ + if (IS_FASTOPEN(tp->t_flags) && + (((flags & TH_SYN) && (tp->t_rxtshift > 0)) || + ((tp->t_state == TCPS_SYN_SENT) && + (tp->t_tfo_client_cookie_len == 0)) || + (flags & TH_RST))) { + len = 0; + sack_rxmit = 0; + rsm = NULL; + } + /* Without fast-open there should never be data sent on a SYN */ + if ((flags & TH_SYN) && (!IS_FASTOPEN(tp->t_flags))) + len = 0; + if (len <= 0) { + /* + * If FIN has been sent but not acked, but we haven't been + * called to retransmit, len will be < 0. Otherwise, window + * shrank after we sent into it. If window shrank to 0, + * cancel pending retransmit, pull snd_nxt back to (closed) + * window, and set the persist timer if it isn't already + * going. If the window didn't close completely, just wait + * for an ACK. + * + * We also do a general check here to ensure that we will + * set the persist timer when we have data to send, but a + * 0-byte window. This makes sure the persist timer is set + * even if the packet hits one of the "goto send" lines + * below. + */ + len = 0; + if ((tp->snd_wnd == 0) && + (TCPS_HAVEESTABLISHED(tp->t_state)) && + (tp->snd_una == tp->snd_max) && + (sb_offset < (int)sbavail(sb))) { + /* + * Not enough room in the rwnd to send + * a paced segment out. + */ + bbr_enter_persist(tp, bbr, cts, __LINE__); + } + } else if ((rsm == NULL) && + (doing_tlp == 0) && + (len < bbr->r_ctl.rc_pace_max_segs)) { + /* + * We are not sending a full segment for + * some reason. Should we not send anything (think + * sws or persists)? + */ + if ((tp->snd_wnd < min((bbr->r_ctl.rc_high_rwnd/2), bbr_minseg(bbr))) && + (TCPS_HAVEESTABLISHED(tp->t_state)) && + (len < (int)(sbavail(sb) - sb_offset))) { + /* + * Here the rwnd is less than + * the pacing size, this is not a retransmit, + * we are established and + * the send is not the last in the socket buffer + * lets not send, and possibly enter persists. + */ + len = 0; + if (tp->snd_max == tp->snd_una) + bbr_enter_persist(tp, bbr, cts, __LINE__); + } else if ((tp->snd_cwnd >= bbr->r_ctl.rc_pace_max_segs) && + (ctf_flight_size(tp, (bbr->r_ctl.rc_sacked + + bbr->r_ctl.rc_lost_bytes)) > (2 * maxseg)) && + (len < (int)(sbavail(sb) - sb_offset)) && + (len < bbr_minseg(bbr))) { + /* + * Here we are not retransmitting, and + * the cwnd is not so small that we could + * not send at least a min size (rxt timer + * not having gone off), We have 2 segments or + * more already in flight, its not the tail end + * of the socket buffer and the cwnd is blocking + * us from sending out minimum pacing segment size. + * Lets not send anything. + */ + bbr->rc_cwnd_limited = 1; + len = 0; + } else if (((tp->snd_wnd - ctf_outstanding(tp)) < + min((bbr->r_ctl.rc_high_rwnd/2), bbr_minseg(bbr))) && + (ctf_flight_size(tp, (bbr->r_ctl.rc_sacked + + bbr->r_ctl.rc_lost_bytes)) > (2 * maxseg)) && + (len < (int)(sbavail(sb) - sb_offset)) && + (TCPS_HAVEESTABLISHED(tp->t_state))) { + /* + * Here we have a send window but we have + * filled it up and we can't send another pacing segment. + * We also have in flight more than 2 segments + * and we are not completing the sb i.e. we allow + * the last bytes of the sb to go out even if + * its not a full pacing segment. + */ + len = 0; + } + } + /* len will be >= 0 after this point. */ + KASSERT(len >= 0, ("[%s:%d]: len < 0", __func__, __LINE__)); + tcp_sndbuf_autoscale(tp, so, sendwin); + /* + * + */ + if (bbr->rc_in_persist && + len && + (rsm == NULL) && + (len < min((bbr->r_ctl.rc_high_rwnd/2), bbr->r_ctl.rc_pace_max_segs))) { + /* + * We are in persist, not doing a retransmit and don't have enough space + * yet to send a full TSO. So is it at the end of the sb + * if so we need to send else nuke to 0 and don't send. + */ + int sbleft; + if (sbavail(sb) > sb_offset) + sbleft = sbavail(sb) - sb_offset; + else + sbleft = 0; + if (sbleft >= min((bbr->r_ctl.rc_high_rwnd/2), bbr->r_ctl.rc_pace_max_segs)) { + /* not at end of sb lets not send */ + len = 0; + } + } + /* + * Decide if we can use TCP Segmentation Offloading (if supported by + * hardware). + * + * TSO may only be used if we are in a pure bulk sending state. The + * presence of TCP-MD5, SACK retransmits, SACK advertizements and IP + * options prevent using TSO. With TSO the TCP header is the same + * (except for the sequence number) for all generated packets. This + * makes it impossible to transmit any options which vary per + * generated segment or packet. + * + * IPv4 handling has a clear separation of ip options and ip header + * flags while IPv6 combines both in in6p_outputopts. ip6_optlen() + * does the right thing below to provide length of just ip options + * and thus checking for ipoptlen is enough to decide if ip options + * are present. + */ +#ifdef INET6 + if (isipv6) + ipoptlen = ip6_optlen(inp); + else +#endif + if (inp->inp_options) + ipoptlen = inp->inp_options->m_len - + offsetof(struct ipoption, ipopt_list); + else + ipoptlen = 0; +#if defined(IPSEC) || defined(IPSEC_SUPPORT) + /* + * Pre-calculate here as we save another lookup into the darknesses + * of IPsec that way and can actually decide if TSO is ok. + */ +#ifdef INET6 + if (isipv6 && IPSEC_ENABLED(ipv6)) + ipsec_optlen = IPSEC_HDRSIZE(ipv6, inp); +#ifdef INET + else +#endif +#endif /* INET6 */ +#ifdef INET + if (IPSEC_ENABLED(ipv4)) + ipsec_optlen = IPSEC_HDRSIZE(ipv4, inp); +#endif /* INET */ +#endif /* IPSEC */ +#if defined(IPSEC) || defined(IPSEC_SUPPORT) + ipoptlen += ipsec_optlen; +#endif + if ((tp->t_flags & TF_TSO) && V_tcp_do_tso && + (len > maxseg) && + (tp->t_port == 0) && + ((tp->t_flags & TF_SIGNATURE) == 0) && + tp->rcv_numsacks == 0 && + ipoptlen == 0) + tso = 1; + + recwin = min(max(sbspace(&so->so_rcv), 0), + TCP_MAXWIN << tp->rcv_scale); + /* + * Sender silly window avoidance. We transmit under the following + * conditions when len is non-zero: + * + * - We have a full segment (or more with TSO) - This is the last + * buffer in a write()/send() and we are either idle or running + * NODELAY - we've timed out (e.g. persist timer) - we have more + * then 1/2 the maximum send window's worth of data (receiver may be + * limited the window size) - we need to retransmit + */ + if (rsm) + goto send; + if (len) { + if (sack_rxmit) + goto send; + if (len >= p_maxseg) + goto send; + /* + * NOTE! on localhost connections an 'ack' from the remote + * end may occur synchronously with the output and cause us + * to flush a buffer queued with moretocome. XXX + * + */ + if (((tp->t_flags & TF_MORETOCOME) == 0) && /* normal case */ + ((tp->t_flags & TF_NODELAY) || + ((uint32_t)len + (uint32_t)sb_offset) >= sbavail(&so->so_snd)) && + (tp->t_flags & TF_NOPUSH) == 0) { + goto send; + } + if ((tp->snd_una == tp->snd_max) && len) { /* Nothing outstanding */ + goto send; + } + if (tp->t_flags & TF_FORCEDATA) { /* typ. timeout case */ + goto send; + } + if (len >= tp->max_sndwnd / 2 && tp->max_sndwnd > 0) { + goto send; + } + } + /* + * Sending of standalone window updates. + * + * Window updates are important when we close our window due to a + * full socket buffer and are opening it again after the application + * reads data from it. Once the window has opened again and the + * remote end starts to send again the ACK clock takes over and + * provides the most current window information. + * + * We must avoid the silly window syndrome whereas every read from + * the receive buffer, no matter how small, causes a window update + * to be sent. We also should avoid sending a flurry of window + * updates when the socket buffer had queued a lot of data and the + * application is doing small reads. + * + * Prevent a flurry of pointless window updates by only sending an + * update when we can increase the advertized window by more than + * 1/4th of the socket buffer capacity. When the buffer is getting + * full or is very small be more aggressive and send an update + * whenever we can increase by two mss sized segments. In all other + * situations the ACK's to new incoming data will carry further + * window increases. + * + * Don't send an independent window update if a delayed ACK is + * pending (it will get piggy-backed on it) or the remote side + * already has done a half-close and won't send more data. Skip + * this if the connection is in T/TCP half-open state. + */ + if (recwin > 0 && !(tp->t_flags & TF_NEEDSYN) && + !(tp->t_flags & TF_DELACK) && + !TCPS_HAVERCVDFIN(tp->t_state)) { + /* Check to see if we should do a window update */ + if (bbr_window_update_needed(tp, so, recwin, maxseg)) + goto send; + } + /* + * Send if we owe the peer an ACK, RST, SYN, or urgent data. ACKNOW + * is also a catch-all for the retransmit timer timeout case. + */ + if (tp->t_flags & TF_ACKNOW) { + goto send; + } + if (((flags & TH_SYN) && (tp->t_flags & TF_NEEDSYN) == 0)) { + goto send; + } + if (SEQ_GT(tp->snd_up, tp->snd_una)) { + goto send; + } + /* + * If our state indicates that FIN should be sent and we have not + * yet done so, then we need to send. + */ + if (flags & TH_FIN && + ((tp->t_flags & TF_SENTFIN) == 0)) { + goto send; + } + /* + * No reason to send a segment, just return. + */ +just_return: + SOCKBUF_UNLOCK(sb); +just_return_nolock: + if (tot_len) + slot = bbr_get_pacing_delay(bbr, bbr->r_ctl.rc_bbr_hptsi_gain, tot_len, cts, 0); + if (bbr->rc_no_pacing) + slot = 0; + if (tot_len == 0) { + if ((ctf_outstanding(tp) + min((bbr->r_ctl.rc_high_rwnd/2), bbr_minseg(bbr))) >= + tp->snd_wnd) { + BBR_STAT_INC(bbr_rwnd_limited); + app_limited = BBR_JR_RWND_LIMITED; + bbr_cwnd_limiting(tp, bbr, ctf_outstanding(tp)); + if ((bbr->rc_in_persist == 0) && + TCPS_HAVEESTABLISHED(tp->t_state) && + (tp->snd_max == tp->snd_una) && + sbavail(&tp->t_inpcb->inp_socket->so_snd)) { + /* No send window.. we must enter persist */ + bbr_enter_persist(tp, bbr, bbr->r_ctl.rc_rcvtime, __LINE__); + } + } else if (ctf_outstanding(tp) >= sbavail(sb)) { + BBR_STAT_INC(bbr_app_limited); + app_limited = BBR_JR_APP_LIMITED; + bbr_cwnd_limiting(tp, bbr, ctf_outstanding(tp)); + } else if ((ctf_flight_size(tp, (bbr->r_ctl.rc_sacked + + bbr->r_ctl.rc_lost_bytes)) + p_maxseg) >= tp->snd_cwnd) { + BBR_STAT_INC(bbr_cwnd_limited); + app_limited = BBR_JR_CWND_LIMITED; + bbr_cwnd_limiting(tp, bbr, ctf_flight_size(tp, (bbr->r_ctl.rc_sacked + + bbr->r_ctl.rc_lost_bytes))); + bbr->rc_cwnd_limited = 1; + } else { + BBR_STAT_INC(bbr_app_limited); + app_limited = BBR_JR_APP_LIMITED; + bbr_cwnd_limiting(tp, bbr, ctf_outstanding(tp)); + } + bbr->r_ctl.rc_hptsi_agg_delay = 0; + bbr->r_agg_early_set = 0; + bbr->r_ctl.rc_agg_early = 0; + bbr->r_ctl.rc_last_delay_val = 0; + } else if (bbr->rc_use_google == 0) + bbr_check_bbr_for_state(bbr, cts, __LINE__, 0); + /* Are we app limited? */ + if ((app_limited == BBR_JR_APP_LIMITED) || + (app_limited == BBR_JR_RWND_LIMITED)) { + /** + * We are application limited. + */ + bbr->r_ctl.r_app_limited_until = (ctf_flight_size(tp, (bbr->r_ctl.rc_sacked + + bbr->r_ctl.rc_lost_bytes)) + bbr->r_ctl.rc_delivered); + } + if (tot_len == 0) + counter_u64_add(bbr_out_size[TCP_MSS_ACCT_JUSTRET], 1); + tp->t_flags &= ~TF_FORCEDATA; + /* Dont update the time if we did not send */ + bbr->r_ctl.rc_last_delay_val = 0; + bbr->rc_output_starts_timer = 1; + bbr_start_hpts_timer(bbr, tp, cts, 9, slot, tot_len); + bbr_log_type_just_return(bbr, cts, tot_len, hpts_calling, app_limited, p_maxseg, len); + if (SEQ_LT(tp->snd_nxt, tp->snd_max)) { + /* Make sure snd_nxt is drug up */ + tp->snd_nxt = tp->snd_max; + } + return (error); + +send: + if (doing_tlp == 0) { + /* + * Data not a TLP, and its not the rxt firing. If it is the + * rxt firing, we want to leave the tlp_in_progress flag on + * so we don't send another TLP. It has to be a rack timer + * or normal send (response to acked data) to clear the tlp + * in progress flag. + */ + bbr->rc_tlp_in_progress = 0; + bbr->rc_tlp_rtx_out = 0; + } else { + /* + * Its a TLP. + */ + bbr->rc_tlp_in_progress = 1; + } + bbr_timer_cancel(bbr, __LINE__, cts); + if (rsm == NULL) { + if (sbused(sb) > 0) { + /* + * This is sub-optimal. We only send a stand alone + * FIN on its own segment. + */ + if (flags & TH_FIN) { + flags &= ~TH_FIN; + if ((len == 0) && ((tp->t_flags & TF_ACKNOW) == 0)) { + /* Lets not send this */ + slot = 0; + goto just_return; + } + } + } + } else { + /* + * We do *not* send a FIN on a retransmit if it has data. + * The if clause here where len > 1 should never come true. + */ + if ((len > 0) && + (((rsm->r_flags & BBR_HAS_FIN) == 0) && + (flags & TH_FIN))) { + flags &= ~TH_FIN; + len--; + } + } + SOCKBUF_LOCK_ASSERT(sb); + if (len > 0) { + if ((tp->snd_una == tp->snd_max) && + (bbr_calc_time(cts, bbr->r_ctl.rc_went_idle_time) >= bbr_rtt_probe_time)) { + /* + * This qualifies as a RTT_PROBE session since we + * drop the data outstanding to nothing and waited + * more than bbr_rtt_probe_time. + */ + bbr_log_rtt_shrinks(bbr, cts, 0, 0, __LINE__, BBR_RTTS_WASIDLE, 0); + bbr_set_reduced_rtt(bbr, cts, __LINE__); + } + if (len >= maxseg) + tp->t_flags2 |= TF2_PLPMTU_MAXSEGSNT; + else + tp->t_flags2 &= ~TF2_PLPMTU_MAXSEGSNT; + } + /* + * Before ESTABLISHED, force sending of initial options unless TCP + * set not to do any options. NOTE: we assume that the IP/TCP header + * plus TCP options always fit in a single mbuf, leaving room for a + * maximum link header, i.e. max_linkhdr + sizeof (struct tcpiphdr) + * + optlen <= MCLBYTES + */ + optlen = 0; +#ifdef INET6 + if (isipv6) + hdrlen = sizeof(struct ip6_hdr) + sizeof(struct tcphdr); + else +#endif + hdrlen = sizeof(struct tcpiphdr); + + /* + * Compute options for segment. We only have to care about SYN and + * established connection segments. Options for SYN-ACK segments + * are handled in TCP syncache. + */ + to.to_flags = 0; + local_options = 0; + if ((tp->t_flags & TF_NOOPT) == 0) { + /* Maximum segment size. */ + if (flags & TH_SYN) { + to.to_mss = tcp_mssopt(&inp->inp_inc); +#ifdef NETFLIX_TCPOUDP + if (tp->t_port) + to.to_mss -= V_tcp_udp_tunneling_overhead; +#endif + to.to_flags |= TOF_MSS; + /* + * On SYN or SYN|ACK transmits on TFO connections, + * only include the TFO option if it is not a + * retransmit, as the presence of the TFO option may + * have caused the original SYN or SYN|ACK to have + * been dropped by a middlebox. + */ + if (IS_FASTOPEN(tp->t_flags) && + (tp->t_rxtshift == 0)) { + if (tp->t_state == TCPS_SYN_RECEIVED) { + to.to_tfo_len = TCP_FASTOPEN_COOKIE_LEN; + to.to_tfo_cookie = + (u_int8_t *)&tp->t_tfo_cookie.server; + to.to_flags |= TOF_FASTOPEN; + wanted_cookie = 1; + } else if (tp->t_state == TCPS_SYN_SENT) { + to.to_tfo_len = + tp->t_tfo_client_cookie_len; + to.to_tfo_cookie = + tp->t_tfo_cookie.client; + to.to_flags |= TOF_FASTOPEN; + wanted_cookie = 1; + } + } + } + /* Window scaling. */ + if ((flags & TH_SYN) && (tp->t_flags & TF_REQ_SCALE)) { + to.to_wscale = tp->request_r_scale; + to.to_flags |= TOF_SCALE; + } + /* Timestamps. */ + if ((tp->t_flags & TF_RCVD_TSTMP) || + ((flags & TH_SYN) && (tp->t_flags & TF_REQ_TSTMP))) { + to.to_tsval = tcp_tv_to_mssectick(&bbr->rc_tv) + tp->ts_offset; + to.to_tsecr = tp->ts_recent; + to.to_flags |= TOF_TS; + local_options += TCPOLEN_TIMESTAMP + 2; + } + /* Set receive buffer autosizing timestamp. */ + if (tp->rfbuf_ts == 0 && + (so->so_rcv.sb_flags & SB_AUTOSIZE)) + tp->rfbuf_ts = tcp_tv_to_mssectick(&bbr->rc_tv); + /* Selective ACK's. */ + if (flags & TH_SYN) + to.to_flags |= TOF_SACKPERM; + else if (TCPS_HAVEESTABLISHED(tp->t_state) && + tp->rcv_numsacks > 0) { + to.to_flags |= TOF_SACK; + to.to_nsacks = tp->rcv_numsacks; + to.to_sacks = (u_char *)tp->sackblks; + } +#if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) + /* TCP-MD5 (RFC2385). */ + if (tp->t_flags & TF_SIGNATURE) + to.to_flags |= TOF_SIGNATURE; +#endif /* TCP_SIGNATURE */ + + /* Processing the options. */ + hdrlen += (optlen = tcp_addoptions(&to, opt)); + /* + * If we wanted a TFO option to be added, but it was unable + * to fit, ensure no data is sent. + */ + if (IS_FASTOPEN(tp->t_flags) && wanted_cookie && + !(to.to_flags & TOF_FASTOPEN)) + len = 0; + } +#ifdef NETFLIX_TCPOUDP + if (tp->t_port) { + if (V_tcp_udp_tunneling_port == 0) { + /* The port was removed?? */ + SOCKBUF_UNLOCK(&so->so_snd); + return (EHOSTUNREACH); + } + + hdrlen += sizeof(struct udphdr); + } +#endif +#ifdef INET6 + if (isipv6) + ipoptlen = ip6_optlen(tp->t_inpcb); + else +#endif + if (tp->t_inpcb->inp_options) + ipoptlen = tp->t_inpcb->inp_options->m_len - + offsetof(struct ipoption, ipopt_list); + else + ipoptlen = 0; + ipoptlen = 0; +#if defined(IPSEC) || defined(IPSEC_SUPPORT) + ipoptlen += ipsec_optlen; +#endif + if (bbr->rc_last_options != local_options) { + /* + * Cache the options length this generally does not change + * on a connection. We use this to calculate TSO. + */ + bbr->rc_last_options = local_options; + } + maxseg = tp->t_maxseg - (ipoptlen + optlen); + p_maxseg = min(maxseg, pace_max_segs); + /* + * Adjust data length if insertion of options will bump the packet + * length beyond the t_maxseg length. Clear the FIN bit because we + * cut off the tail of the segment. + */ +#ifdef KERN_TLS + /* force TSO for so TLS offload can get mss */ + if (sb->sb_flags & SB_TLS_IFNET) { + force_tso = 1; + } +#endif + + if (len > maxseg) { + if (len != 0 && (flags & TH_FIN)) { + flags &= ~TH_FIN; + } + if (tso) { + uint32_t moff; + int32_t max_len; + + /* extract TSO information */ + if_hw_tsomax = tp->t_tsomax; + if_hw_tsomaxsegcount = tp->t_tsomaxsegcount; + if_hw_tsomaxsegsize = tp->t_tsomaxsegsize; + KASSERT(ipoptlen == 0, + ("%s: TSO can't do IP options", __func__)); + + /* + * Check if we should limit by maximum payload + * length: + */ + if (if_hw_tsomax != 0) { + /* compute maximum TSO length */ + max_len = (if_hw_tsomax - hdrlen - + max_linkhdr); + if (max_len <= 0) { + len = 0; + } else if (len > max_len) { + len = max_len; + } + } + /* + * Prevent the last segment from being fractional + * unless the send sockbuf can be emptied: + */ + if (((sb_offset + len) < sbavail(sb)) && + (hw_tls == 0)) { + moff = len % (uint32_t)maxseg; + if (moff != 0) { + len -= moff; + } + } + /* + * In case there are too many small fragments don't + * use TSO: + */ + if (len <= maxseg) { + len = maxseg; + tso = 0; + } + } else { + /* Not doing TSO */ + if (optlen + ipoptlen > tp->t_maxseg) { + /* + * Since we don't have enough space to put + * the IP header chain and the TCP header in + * one packet as required by RFC 7112, don't + * send it. + */ + SOCKBUF_UNLOCK(&so->so_snd); + error = EMSGSIZE; + sack_rxmit = 0; + goto out; + } + len = maxseg; + } + } else { + /* Not doing TSO */ + if_hw_tsomaxsegcount = 0; + tso = 0; + } + KASSERT(len + hdrlen + ipoptlen <= IP_MAXPACKET, + ("%s: len > IP_MAXPACKET", __func__)); +#ifdef DIAGNOSTIC +#ifdef INET6 + if (max_linkhdr + hdrlen > MCLBYTES) +#else + if (max_linkhdr + hdrlen > MHLEN) +#endif + panic("tcphdr too big"); +#endif + /* + * This KASSERT is here to catch edge cases at a well defined place. + * Before, those had triggered (random) panic conditions further + * down. + */ +#ifdef BBR_INVARIANTS + if (sack_rxmit) { + if (SEQ_LT(rsm->r_start, tp->snd_una)) { + panic("RSM:%p TP:%p bbr:%p start:%u is < snd_una:%u", + rsm, tp, bbr, rsm->r_start, tp->snd_una); + } + } +#endif + KASSERT(len >= 0, ("[%s:%d]: len < 0", __func__, __LINE__)); + if ((len == 0) && + (flags & TH_FIN) && + (sbused(sb))) { + /* + * We have outstanding data, don't send a fin by itself!. + */ + slot = 0; + goto just_return; + } + /* + * Grab a header mbuf, attaching a copy of data to be transmitted, + * and initialize the header from the template for sends on this + * connection. + */ + if (len) { + uint32_t moff; + uint32_t orig_len; + + /* + * We place a limit on sending with hptsi. + */ + if ((rsm == NULL) && len > pace_max_segs) + len = pace_max_segs; + if (len <= maxseg) + tso = 0; +#ifdef INET6 + if (MHLEN < hdrlen + max_linkhdr) + m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); + else +#endif + m = m_gethdr(M_NOWAIT, MT_DATA); + + if (m == NULL) { + BBR_STAT_INC(bbr_failed_mbuf_aloc); + bbr_log_enobuf_jmp(bbr, len, cts, __LINE__, len, 0, 0); + SOCKBUF_UNLOCK(sb); + error = ENOBUFS; + sack_rxmit = 0; + goto out; + } + m->m_data += max_linkhdr; + m->m_len = hdrlen; + /* + * Start the m_copy functions from the closest mbuf to the + * sb_offset in the socket buffer chain. + */ + if ((sb_offset > sbavail(sb)) || ((len + sb_offset) > sbavail(sb))) { +#ifdef BBR_INVARIANTS + if ((len + sb_offset) > (sbavail(sb) + ((flags & (TH_FIN | TH_SYN)) ? 1 : 0))) + panic("tp:%p bbr:%p len:%u sb_offset:%u sbavail:%u rsm:%p %u:%u:%u", + tp, bbr, len, sb_offset, sbavail(sb), rsm, + doing_retran_from, + picked_up_retran, + doing_tlp); + +#endif + /* + * In this messed up situation we have two choices, + * a) pretend the send worked, and just start timers + * and what not (not good since that may lead us + * back here a lot). b) Send the lowest segment + * in the map. c) Drop the connection. Lets do + * which if it continues to happen will lead to + * via timeouts. + */ + BBR_STAT_INC(bbr_offset_recovery); + rsm = TAILQ_FIRST(&bbr->r_ctl.rc_map); + sb_offset = 0; + if (rsm == NULL) { + sack_rxmit = 0; + len = sbavail(sb); + } else { + sack_rxmit = 1; + if (rsm->r_start != tp->snd_una) { + /* + * Things are really messed up, + * is the only thing to do. + */ + BBR_STAT_INC(bbr_offset_drop); + tcp_set_inp_to_drop(inp, EFAULT); + return (0); + } + len = rsm->r_end - rsm->r_start; + } + if (len > sbavail(sb)) + len = sbavail(sb); + if (len > maxseg) + len = maxseg; + } + mb = sbsndptr_noadv(sb, sb_offset, &moff); + if (len <= MHLEN - hdrlen - max_linkhdr && !hw_tls) { + m_copydata(mb, moff, (int)len, + mtod(m, caddr_t)+hdrlen); + if (rsm == NULL) + sbsndptr_adv(sb, mb, len); + m->m_len += len; + } else { + struct sockbuf *msb; + + if (rsm) + msb = NULL; + else + msb = sb; +#ifdef BBR_INVARIANTS + if ((len + moff) > (sbavail(sb) + ((flags & (TH_FIN | TH_SYN)) ? 1 : 0))) { + if (rsm) { + panic("tp:%p bbr:%p len:%u moff:%u sbavail:%u rsm:%p snd_una:%u rsm_start:%u flg:%x %u:%u:%u sr:%d ", + tp, bbr, len, moff, + sbavail(sb), rsm, + tp->snd_una, rsm->r_flags, rsm->r_start, + doing_retran_from, + picked_up_retran, + doing_tlp, sack_rxmit); + } else { + panic("tp:%p bbr:%p len:%u moff:%u sbavail:%u sb_offset:%u snd_una:%u", + tp, bbr, len, moff, sbavail(sb), sb_offset, tp->snd_una); + } + } +#endif + orig_len = len; + m->m_next = tcp_m_copym( +#ifdef NETFLIX_COPY_ARGS + tp, +#endif + mb, moff, &len, + if_hw_tsomaxsegcount, + if_hw_tsomaxsegsize, msb, + ((rsm == NULL) ? hw_tls : 0) +#ifdef NETFLIX_COPY_ARGS + , &filled_all +#endif + ); + if (len <= maxseg && !force_tso) { + /* + * Must have ran out of mbufs for the copy + * shorten it to no longer need tso. Lets + * not put on sendalot since we are low on + * mbufs. + */ + tso = 0; + } + if (m->m_next == NULL) { + SOCKBUF_UNLOCK(sb); + (void)m_free(m); + error = ENOBUFS; + sack_rxmit = 0; + goto out; + } + } +#ifdef BBR_INVARIANTS + if (tso && len < maxseg) { + panic("tp:%p tso on, but len:%d < maxseg:%d", + tp, len, maxseg); + } + if (tso && if_hw_tsomaxsegcount) { + int32_t seg_cnt = 0; + struct mbuf *foo; + + foo = m; + while (foo) { + seg_cnt++; + foo = foo->m_next; + } + if (seg_cnt > if_hw_tsomaxsegcount) { + panic("seg_cnt:%d > max:%d", seg_cnt, if_hw_tsomaxsegcount); + } + } +#endif + /* + * If we're sending everything we've got, set PUSH. (This + * will keep happy those implementations which only give + * data to the user when a buffer fills or a PUSH comes in.) + */ + if (sb_offset + len == sbused(sb) && + sbused(sb) && + !(flags & TH_SYN)) { + flags |= TH_PUSH; + } + SOCKBUF_UNLOCK(sb); + } else { + SOCKBUF_UNLOCK(sb); + if (tp->t_flags & TF_ACKNOW) + TCPSTAT_INC(tcps_sndacks); + else if (flags & (TH_SYN | TH_FIN | TH_RST)) + TCPSTAT_INC(tcps_sndctrl); + else if (SEQ_GT(tp->snd_up, tp->snd_una)) + TCPSTAT_INC(tcps_sndurg); + else + TCPSTAT_INC(tcps_sndwinup); + + m = m_gethdr(M_NOWAIT, MT_DATA); + if (m == NULL) { + BBR_STAT_INC(bbr_failed_mbuf_aloc); + bbr_log_enobuf_jmp(bbr, len, cts, __LINE__, len, 0, 0); + error = ENOBUFS; + /* Fudge the send time since we could not send */ + sack_rxmit = 0; + goto out; + } +#ifdef INET6 + if (isipv6 && (MHLEN < hdrlen + max_linkhdr) && + MHLEN >= hdrlen) { + M_ALIGN(m, hdrlen); + } else +#endif + m->m_data += max_linkhdr; + m->m_len = hdrlen; + } + SOCKBUF_UNLOCK_ASSERT(sb); + m->m_pkthdr.rcvif = (struct ifnet *)0; +#ifdef MAC + mac_inpcb_create_mbuf(inp, m); +#endif +#ifdef INET6 + if (isipv6) { + ip6 = mtod(m, struct ip6_hdr *); +#ifdef NETFLIX_TCPOUDP + if (tp->t_port) { + udp = (struct udphdr *)((caddr_t)ip6 + ipoptlen + sizeof(struct ip6_hdr)); + udp->uh_sport = htons(V_tcp_udp_tunneling_port); + udp->uh_dport = tp->t_port; + ulen = hdrlen + len - sizeof(struct ip6_hdr); + udp->uh_ulen = htons(ulen); + th = (struct tcphdr *)(udp + 1); + } else { +#endif + th = (struct tcphdr *)(ip6 + 1); + +#ifdef NETFLIX_TCPOUDP + } +#endif + tcpip_fillheaders(inp, +#ifdef NETFLIX_TCPOUDP + tp->t_port, +#endif + ip6, th); + } else +#endif /* INET6 */ + { + ip = mtod(m, struct ip *); +#ifdef TCPDEBUG + ipov = (struct ipovly *)ip; +#endif +#ifdef NETFLIX_TCPOUDP + if (tp->t_port) { + udp = (struct udphdr *)((caddr_t)ip + ipoptlen + sizeof(struct ip)); + udp->uh_sport = htons(V_tcp_udp_tunneling_port); + udp->uh_dport = tp->t_port; + ulen = hdrlen + len - sizeof(struct ip); + udp->uh_ulen = htons(ulen); + th = (struct tcphdr *)(udp + 1); + } else +#endif + th = (struct tcphdr *)(ip + 1); + tcpip_fillheaders(inp, +#ifdef NETFLIX_TCPOUDP + tp->t_port, +#endif + ip, th); + } + /* + * If we are doing retransmissions, then snd_nxt will not reflect + * the first unsent octet. For ACK only packets, we do not want the + * sequence number of the retransmitted packet, we want the sequence + * number of the next unsent octet. So, if there is no data (and no + * SYN or FIN), use snd_max instead of snd_nxt when filling in + * ti_seq. But if we are in persist state, snd_max might reflect + * one byte beyond the right edge of the window, so use snd_nxt in + * that case, since we know we aren't doing a retransmission. + * (retransmit and persist are mutually exclusive...) + */ + if (sack_rxmit == 0) { + if (len && ((flags & (TH_FIN | TH_SYN | TH_RST)) == 0)) { + /* New data (including new persists) */ + th->th_seq = htonl(tp->snd_max); + bbr_seq = tp->snd_max; + } else if (flags & TH_SYN) { + /* Syn's always send from iss */ + th->th_seq = htonl(tp->iss); + bbr_seq = tp->iss; + } else if (flags & TH_FIN) { + if (flags & TH_FIN && tp->t_flags & TF_SENTFIN) { + /* + * If we sent the fin already its 1 minus + * snd_max + */ + th->th_seq = (htonl(tp->snd_max - 1)); + bbr_seq = (tp->snd_max - 1); + } else { + /* First time FIN use snd_max */ + th->th_seq = htonl(tp->snd_max); + bbr_seq = tp->snd_max; + } + } else if (flags & TH_RST) { + /* + * For a Reset send the last cum ack in sequence + * (this like any other choice may still generate a + * challenge ack, if a ack-update packet is in + * flight). + */ + th->th_seq = htonl(tp->snd_una); + bbr_seq = tp->snd_una; + } else { + /* + * len == 0 and not persist we use snd_max, sending + * an ack unless we have sent the fin then its 1 + * minus. + */ + /* + * XXXRRS Question if we are in persists and we have + * nothing outstanding to send and we have not sent + * a FIN, we will send an ACK. In such a case it + * might be better to send (tp->snd_una - 1) which + * would force the peer to ack. + */ + if (tp->t_flags & TF_SENTFIN) { + th->th_seq = htonl(tp->snd_max - 1); + bbr_seq = (tp->snd_max - 1); + } else { + th->th_seq = htonl(tp->snd_max); + bbr_seq = tp->snd_max; + } + } + } else { + /* All retransmits use the rsm to guide the send */ + th->th_seq = htonl(rsm->r_start); + bbr_seq = rsm->r_start; + } + th->th_ack = htonl(tp->rcv_nxt); + if (optlen) { + bcopy(opt, th + 1, optlen); + th->th_off = (sizeof(struct tcphdr) + optlen) >> 2; + } + th->th_flags = flags; + /* + * Calculate receive window. Don't shrink window, but avoid silly + * window syndrome. + */ + if ((flags & TH_RST) || ((recwin < (so->so_rcv.sb_hiwat / 4) && + recwin < maxseg))) + recwin = 0; + if (SEQ_GT(tp->rcv_adv, tp->rcv_nxt) && + recwin < (tp->rcv_adv - tp->rcv_nxt)) + recwin = (tp->rcv_adv - tp->rcv_nxt); + if (recwin > TCP_MAXWIN << tp->rcv_scale) + recwin = TCP_MAXWIN << tp->rcv_scale; + + /* + * According to RFC1323 the window field in a SYN (i.e., a or + * ) segment itself is never scaled. The case is + * handled in syncache. + */ + if (flags & TH_SYN) + th->th_win = htons((u_short) + (min(sbspace(&so->so_rcv), TCP_MAXWIN))); + else + th->th_win = htons((u_short)(recwin >> tp->rcv_scale)); + /* + * Adjust the RXWIN0SENT flag - indicate that we have advertised a 0 + * window. This may cause the remote transmitter to stall. This + * flag tells soreceive() to disable delayed acknowledgements when + * draining the buffer. This can occur if the receiver is + * attempting to read more data than can be buffered prior to + * transmitting on the connection. + */ + if (th->th_win == 0) { + tp->t_sndzerowin++; + tp->t_flags |= TF_RXWIN0SENT; + } else + tp->t_flags &= ~TF_RXWIN0SENT; + if (SEQ_GT(tp->snd_up, tp->snd_max)) { + th->th_urp = htons((u_short)(tp->snd_up - tp->snd_max)); + th->th_flags |= TH_URG; + } else + /* + * If no urgent pointer to send, then we pull the urgent + * pointer to the left edge of the send window so that it + * doesn't drift into the send window on sequence number + * wraparound. + */ + tp->snd_up = tp->snd_una; /* drag it along */ + +#if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) + if (to.to_flags & TOF_SIGNATURE) { + /* + * Calculate MD5 signature and put it into the place + * determined before. NOTE: since TCP options buffer doesn't + * point into mbuf's data, calculate offset and use it. + */ + if (!TCPMD5_ENABLED() || TCPMD5_OUTPUT(m, th, + (u_char *)(th + 1) + (to.to_signature - opt)) != 0) { + /* + * Do not send segment if the calculation of MD5 + * digest has failed. + */ + goto out; + } + } +#endif + + /* + * Put TCP length in extended header, and then checksum extended + * header and data. + */ + m->m_pkthdr.len = hdrlen + len; /* in6_cksum() need this */ +#ifdef INET6 + if (isipv6) { + /* + * ip6_plen is not need to be filled now, and will be filled + * in ip6_output. + */ +#ifdef NETFLIX_TCPOUDP + if (tp->t_port) { + m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; + m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); + udp->uh_sum = in6_cksum_pseudo(ip6, ulen, IPPROTO_UDP, 0); + th->th_sum = htons(0); + UDPSTAT_INC(udps_opackets); + } else { +#endif + csum_flags = m->m_pkthdr.csum_flags = CSUM_TCP_IPV6; + m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum); + th->th_sum = in6_cksum_pseudo(ip6, sizeof(struct tcphdr) + + optlen + len, IPPROTO_TCP, 0); +#ifdef NETFLIX_TCPOUDP + } +#endif + } +#endif +#if defined(INET6) && defined(INET) + else +#endif +#ifdef INET + { +#ifdef NETFLIX_TCPOUDP + if (tp->t_port) { + m->m_pkthdr.csum_flags = CSUM_UDP; + m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); + udp->uh_sum = in_pseudo(ip->ip_src.s_addr, + ip->ip_dst.s_addr, htons(ulen + IPPROTO_UDP)); + th->th_sum = htons(0); + UDPSTAT_INC(udps_opackets); + } else { +#endif + csum_flags = m->m_pkthdr.csum_flags = CSUM_TCP; + m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum); + th->th_sum = in_pseudo(ip->ip_src.s_addr, + ip->ip_dst.s_addr, htons(sizeof(struct tcphdr) + + IPPROTO_TCP + len + optlen)); +#ifdef NETFLIX_TCPOUDP + } +#endif + /* IP version must be set here for ipv4/ipv6 checking later */ + KASSERT(ip->ip_v == IPVERSION, + ("%s: IP version incorrect: %d", __func__, ip->ip_v)); + } +#endif + + /* + * Enable TSO and specify the size of the segments. The TCP pseudo + * header checksum is always provided. XXX: Fixme: This is currently + * not the case for IPv6. + */ + if (tso || force_tso) { + KASSERT(force_tso || len > maxseg, + ("%s: len:%d <= tso_segsz:%d", __func__, len, maxseg)); + m->m_pkthdr.csum_flags |= CSUM_TSO; + csum_flags |= CSUM_TSO; + m->m_pkthdr.tso_segsz = maxseg; + } + KASSERT(len + hdrlen == m_length(m, NULL), + ("%s: mbuf chain different than expected: %d + %u != %u", + __func__, len, hdrlen, m_length(m, NULL))); + +#ifdef TCP_HHOOK + /* Run HHOOK_TC_ESTABLISHED_OUT helper hooks. */ + hhook_run_tcp_est_out(tp, th, &to, len, tso); +#endif +#ifdef TCPDEBUG + /* + * Trace. + */ + if (so->so_options & SO_DEBUG) { + u_short save = 0; + +#ifdef INET6 + if (!isipv6) +#endif + { + save = ipov->ih_len; + ipov->ih_len = htons(m->m_pkthdr.len /* - hdrlen + + * (th->th_off << 2) */ ); + } + tcp_trace(TA_OUTPUT, tp->t_state, tp, mtod(m, void *), th, 0); +#ifdef INET6 + if (!isipv6) +#endif + ipov->ih_len = save; + } +#endif /* TCPDEBUG */ + + /* Log to the black box */ + if (tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + + bbr_fill_in_logging_data(bbr, &log.u_bbr, cts); + /* Record info on type of transmission */ + log.u_bbr.flex1 = bbr->r_ctl.rc_hptsi_agg_delay; + log.u_bbr.flex2 = (bbr->r_recovery_bw << 3); + log.u_bbr.flex3 = maxseg; + log.u_bbr.flex4 = delay_calc; + /* Encode filled_all into the upper flex5 bit */ + log.u_bbr.flex5 = bbr->rc_past_init_win; + log.u_bbr.flex5 <<= 1; + log.u_bbr.flex5 |= bbr->rc_no_pacing; + log.u_bbr.flex5 <<= 29; + if (filled_all) + log.u_bbr.flex5 |= 0x80000000; + log.u_bbr.flex5 |= tp->t_maxseg; + log.u_bbr.flex6 = bbr->r_ctl.rc_pace_max_segs; + log.u_bbr.flex7 = (bbr->rc_bbr_state << 8) | bbr_state_val(bbr); + /* lets poke in the low and the high here for debugging */ + log.u_bbr.pkts_out = bbr->rc_tp->t_maxseg; + if (rsm || sack_rxmit) { + if (doing_tlp) + log.u_bbr.flex8 = 2; + else + log.u_bbr.flex8 = 1; + } else { + log.u_bbr.flex8 = 0; + } + lgb = tcp_log_event_(tp, th, &so->so_rcv, &so->so_snd, TCP_LOG_OUT, ERRNO_UNK, + len, &log, false, NULL, NULL, 0, tv); + } else { + lgb = NULL; + } + /* + * Fill in IP length and desired time to live and send to IP level. + * There should be a better way to handle ttl and tos; we could keep + * them in the template, but need a way to checksum without them. + */ + /* + * m->m_pkthdr.len should have been set before cksum calcuration, + * because in6_cksum() need it. + */ +#ifdef INET6 + if (isipv6) { + /* + * we separately set hoplimit for every segment, since the + * user might want to change the value via setsockopt. Also, + * desired default hop limit might be changed via Neighbor + * Discovery. + */ + ip6->ip6_hlim = in6_selecthlim(inp, NULL); + + /* + * Set the packet size here for the benefit of DTrace + * probes. ip6_output() will set it properly; it's supposed + * to include the option header lengths as well. + */ + ip6->ip6_plen = htons(m->m_pkthdr.len - sizeof(*ip6)); + + if (V_path_mtu_discovery && maxseg > V_tcp_minmss) + tp->t_flags2 |= TF2_PLPMTU_PMTUD; + else + tp->t_flags2 &= ~TF2_PLPMTU_PMTUD; + + if (tp->t_state == TCPS_SYN_SENT) + TCP_PROBE5(connect__request, NULL, tp, ip6, tp, th); + + TCP_PROBE5(send, NULL, tp, ip6, tp, th); + /* TODO: IPv6 IP6TOS_ECT bit on */ + error = ip6_output(m, inp->in6p_outputopts, + &inp->inp_route6, + ((rsm || sack_rxmit) ? IP_NO_SND_TAG_RL : 0), + NULL, NULL, inp); + + if (error == EMSGSIZE && inp->inp_route6.ro_rt != NULL) + mtu = inp->inp_route6.ro_rt->rt_mtu; + } +#endif /* INET6 */ +#if defined(INET) && defined(INET6) + else +#endif +#ifdef INET + { + ip->ip_len = htons(m->m_pkthdr.len); +#ifdef INET6 + if (isipv6) + ip->ip_ttl = in6_selecthlim(inp, NULL); +#endif /* INET6 */ + /* + * If we do path MTU discovery, then we set DF on every + * packet. This might not be the best thing to do according + * to RFC3390 Section 2. However the tcp hostcache migitates + * the problem so it affects only the first tcp connection + * with a host. + * + * NB: Don't set DF on small MTU/MSS to have a safe + * fallback. + */ + if (V_path_mtu_discovery && tp->t_maxseg > V_tcp_minmss) { + tp->t_flags2 |= TF2_PLPMTU_PMTUD; + if (tp->t_port == 0 || len < V_tcp_minmss) { + ip->ip_off |= htons(IP_DF); + } + } else { + tp->t_flags2 &= ~TF2_PLPMTU_PMTUD; + } + + if (tp->t_state == TCPS_SYN_SENT) + TCP_PROBE5(connect__request, NULL, tp, ip, tp, th); + + TCP_PROBE5(send, NULL, tp, ip, tp, th); + + error = ip_output(m, inp->inp_options, &inp->inp_route, + ((rsm || sack_rxmit) ? IP_NO_SND_TAG_RL : 0), 0, + inp); + if (error == EMSGSIZE && inp->inp_route.ro_rt != NULL) + mtu = inp->inp_route.ro_rt->rt_mtu; + } +#endif /* INET */ +out: + + if (lgb) { + lgb->tlb_errno = error; + lgb = NULL; + } + /* + * In transmit state, time the transmission and arrange for the + * retransmit. In persist state, just set snd_max. + */ + if (error == 0) { + if (TCPS_HAVEESTABLISHED(tp->t_state) && + (tp->t_flags & TF_SACK_PERMIT) && + tp->rcv_numsacks > 0) + tcp_clean_dsack_blocks(tp); + /* We sent an ack clear the bbr_segs_rcvd count */ + bbr->output_error_seen = 0; + bbr->oerror_cnt = 0; + bbr->bbr_segs_rcvd = 0; + if (len == 0) + counter_u64_add(bbr_out_size[TCP_MSS_ACCT_SNDACK], 1); + else if (hw_tls) { + if (filled_all || + (len >= bbr->r_ctl.rc_pace_max_segs)) + BBR_STAT_INC(bbr_meets_tso_thresh); + else { + if (doing_tlp) { + BBR_STAT_INC(bbr_miss_tlp); + bbr_log_type_hrdwtso(tp, bbr, len, 1, what_we_can); + + + } else if (rsm) { + BBR_STAT_INC(bbr_miss_retran); + bbr_log_type_hrdwtso(tp, bbr, len, 2, what_we_can); + } else if ((ctf_outstanding(tp) + bbr->r_ctl.rc_pace_max_segs) > sbavail(sb)) { + BBR_STAT_INC(bbr_miss_tso_app); + bbr_log_type_hrdwtso(tp, bbr, len, 3, what_we_can); + } else if ((ctf_flight_size(tp, (bbr->r_ctl.rc_sacked + + bbr->r_ctl.rc_lost_bytes)) + bbr->r_ctl.rc_pace_max_segs) > tp->snd_cwnd) { + BBR_STAT_INC(bbr_miss_tso_cwnd); + bbr_log_type_hrdwtso(tp, bbr, len, 4, what_we_can); + } else if ((ctf_outstanding(tp) + bbr->r_ctl.rc_pace_max_segs) > tp->snd_wnd) { + BBR_STAT_INC(bbr_miss_tso_rwnd); + bbr_log_type_hrdwtso(tp, bbr, len, 5, what_we_can); + } else { + BBR_STAT_INC(bbr_miss_unknown); + bbr_log_type_hrdwtso(tp, bbr, len, 6, what_we_can); + } + } + } + /* Do accounting for new sends */ + if ((len > 0) && (rsm == NULL)) { + int idx; + if (tp->snd_una == tp->snd_max) { + /* + * Special case to match google, when + * nothing is in flight the delivered + * time does get updated to the current + * time (see tcp_rate_bsd.c). + */ + bbr->r_ctl.rc_del_time = cts; + } + if (len >= maxseg) { + idx = (len / maxseg) + 3; + if (idx >= TCP_MSS_ACCT_ATIMER) + counter_u64_add(bbr_out_size[(TCP_MSS_ACCT_ATIMER - 1)], 1); + else + counter_u64_add(bbr_out_size[idx], 1); + } else { + /* smaller than a MSS */ + idx = len / (bbr_hptsi_bytes_min - bbr->rc_last_options); + if (idx >= TCP_MSS_SMALL_MAX_SIZE_DIV) + idx = (TCP_MSS_SMALL_MAX_SIZE_DIV - 1); + counter_u64_add(bbr_out_size[(idx + TCP_MSS_SMALL_SIZE_OFF)], 1); + } + } + } + abandon = 0; + /* + * We must do the send accounting before we log the output, + * otherwise the state of the rsm could change and we account to the + * wrong bucket. + */ + if (len > 0) { + bbr_do_send_accounting(tp, bbr, rsm, len, error); + if (error == 0) { + if (tp->snd_una == tp->snd_max) + bbr->r_ctl.rc_tlp_rxt_last_time = cts; + } + } + bbr_log_output(bbr, tp, &to, len, bbr_seq, (uint8_t) flags, error, + cts, mb, &abandon, rsm, 0, sb); + if (abandon) { + /* + * If bbr_log_output destroys the TCB or sees a TH_RST being + * sent we should hit this condition. + */ + return (0); + } + if (((tp->t_flags & TF_FORCEDATA) == 0) || + (bbr->rc_in_persist == 0)) { + /* + * Advance snd_nxt over sequence space of this segment. + */ + if (error) + /* We don't log or do anything with errors */ + goto skip_upd; + + if (tp->snd_una == tp->snd_max && + (len || (flags & (TH_SYN | TH_FIN)))) { + /* + * Update the time we just added data since none was + * outstanding. + */ + bbr_log_progress_event(bbr, tp, ticks, PROGRESS_START, __LINE__); + bbr->rc_tp->t_acktime = ticks; + } + if (flags & (TH_SYN | TH_FIN) && (rsm == NULL)) { + if (flags & TH_SYN) { + tp->snd_max++; + } + if ((flags & TH_FIN) && ((tp->t_flags & TF_SENTFIN) == 0)) { + tp->snd_max++; + tp->t_flags |= TF_SENTFIN; + } + } + if (sack_rxmit == 0) + tp->snd_max += len; +skip_upd: + if ((error == 0) && len) + tot_len += len; + } else { + /* Persists case */ + int32_t xlen = len; + + if (error) + goto nomore; + + if (flags & TH_SYN) + ++xlen; + if ((flags & TH_FIN) && ((tp->t_flags & TF_SENTFIN) == 0)) { + ++xlen; + tp->t_flags |= TF_SENTFIN; + } + if (xlen && (tp->snd_una == tp->snd_max)) { + /* + * Update the time we just added data since none was + * outstanding. + */ + bbr_log_progress_event(bbr, tp, ticks, PROGRESS_START, __LINE__); + bbr->rc_tp->t_acktime = ticks; + } + if (sack_rxmit == 0) + tp->snd_max += xlen; + tot_len += (len + optlen + ipoptlen); + } +nomore: + if (error) { + /* + * Failures do not advance the seq counter above. For the + * case of ENOBUFS we will fall out and become ack-clocked. + * capping the cwnd at the current flight. + * Everything else will just have to retransmit with the timer + * (no pacer). + */ + SOCKBUF_UNLOCK_ASSERT(sb); + BBR_STAT_INC(bbr_saw_oerr); + /* Clear all delay/early tracks */ + bbr->r_ctl.rc_hptsi_agg_delay = 0; + bbr->r_ctl.rc_agg_early = 0; + bbr->r_agg_early_set = 0; + bbr->output_error_seen = 1; + if (bbr->oerror_cnt < 0xf) + bbr->oerror_cnt++; + if (bbr_max_net_error_cnt && (bbr->oerror_cnt >= bbr_max_net_error_cnt)) { + /* drop the session */ + tcp_set_inp_to_drop(inp, ENETDOWN); + } + switch (error) { + case ENOBUFS: + /* + * Make this guy have to get ack's to send + * more but lets make sure we don't + * slam him below a T-O (1MSS). + */ + if (bbr->rc_bbr_state != BBR_STATE_PROBE_RTT) { + tp->snd_cwnd = ctf_flight_size(tp, (bbr->r_ctl.rc_sacked + + bbr->r_ctl.rc_lost_bytes)) - maxseg; + if (tp->snd_cwnd < maxseg) + tp->snd_cwnd = maxseg; + } + slot = (bbr_error_base_paceout + 1) << bbr->oerror_cnt; + BBR_STAT_INC(bbr_saw_enobuf); + if (bbr->bbr_hdrw_pacing) + counter_u64_add(bbr_hdwr_pacing_enobuf, 1); + else + counter_u64_add(bbr_nohdwr_pacing_enobuf, 1); + /* + * Here even in the enobuf's case we want to do our + * state update. The reason being we may have been + * called by the input function. If so we have had + * things change. + */ + error = 0; + goto enobufs; + case EMSGSIZE: + /* + * For some reason the interface we used initially + * to send segments changed to another or lowered + * its MTU. If TSO was active we either got an + * interface without TSO capabilits or TSO was + * turned off. If we obtained mtu from ip_output() + * then update it and try again. + */ + /* Turn on tracing (or try to) */ + { + int old_maxseg; + + old_maxseg = tp->t_maxseg; + BBR_STAT_INC(bbr_saw_emsgsiz); + bbr_log_msgsize_fail(bbr, tp, len, maxseg, mtu, csum_flags, tso, cts); + if (mtu != 0) + tcp_mss_update(tp, -1, mtu, NULL, NULL); + if (old_maxseg <= tp->t_maxseg) { + /* Huh it did not shrink? */ + tp->t_maxseg = old_maxseg - 40; + bbr_log_msgsize_fail(bbr, tp, len, maxseg, mtu, 0, tso, cts); + } + tp->t_flags &= ~TF_FORCEDATA; + /* + * Nuke all other things that can interfere + * with slot + */ + if ((tot_len + len) && (len >= tp->t_maxseg)) { + slot = bbr_get_pacing_delay(bbr, + bbr->r_ctl.rc_bbr_hptsi_gain, + (tot_len + len), cts, 0); + if (slot < bbr_error_base_paceout) + slot = (bbr_error_base_paceout + 2) << bbr->oerror_cnt; + } else + slot = (bbr_error_base_paceout + 2) << bbr->oerror_cnt; + bbr->rc_output_starts_timer = 1; + bbr_start_hpts_timer(bbr, tp, cts, 10, slot, + tot_len); + return (error); + } + case EPERM: + tp->t_softerror = error; + /* Fall through */ + case EHOSTDOWN: + case EHOSTUNREACH: + case ENETDOWN: + case ENETUNREACH: + if (TCPS_HAVERCVDSYN(tp->t_state)) { + tp->t_softerror = error; + } + /* FALLTHROUGH */ + default: + tp->t_flags &= ~TF_FORCEDATA; + slot = (bbr_error_base_paceout + 3) << bbr->oerror_cnt; + bbr->rc_output_starts_timer = 1; + bbr_start_hpts_timer(bbr, tp, cts, 11, slot, 0); + return (error); + } +#ifdef NETFLIX_STATS + } else if (((tp->t_flags & TF_GPUTINPROG) == 0) && + len && + (rsm == NULL) && + (bbr->rc_in_persist == 0)) { + tp->gput_seq = bbr_seq; + tp->gput_ack = bbr_seq + + min(sbavail(&so->so_snd) - sb_offset, sendwin); + tp->gput_ts = cts; + tp->t_flags |= TF_GPUTINPROG; +#endif + } + TCPSTAT_INC(tcps_sndtotal); + if ((bbr->bbr_hdw_pace_ena) && + (bbr->bbr_attempt_hdwr_pace == 0) && + (bbr->rc_past_init_win) && + (bbr->rc_bbr_state != BBR_STATE_STARTUP) && + (get_filter_value(&bbr->r_ctl.rc_delrate)) && + (inp->inp_route.ro_rt && + inp->inp_route.ro_rt->rt_ifp)) { + /* + * We are past the initial window and + * have at least one measurement so we + * could use hardware pacing if its available. + * We have an interface and we have not attempted + * to setup hardware pacing, lets try to now. + */ + uint64_t rate_wanted; + int err = 0; + + rate_wanted = bbr_get_hardware_rate(bbr); + bbr->bbr_attempt_hdwr_pace = 1; + bbr->r_ctl.crte = tcp_set_pacing_rate(bbr->rc_tp, + inp->inp_route.ro_rt->rt_ifp, + rate_wanted, + (RS_PACING_GEQ|RS_PACING_SUB_OK), + &err); + if (bbr->r_ctl.crte) { + bbr_type_log_hdwr_pacing(bbr, + bbr->r_ctl.crte->ptbl->rs_ifp, + rate_wanted, + bbr->r_ctl.crte->rate, + __LINE__, cts, err); + BBR_STAT_INC(bbr_hdwr_rl_add_ok); + counter_u64_add(bbr_flows_nohdwr_pacing, -1); + counter_u64_add(bbr_flows_whdwr_pacing, 1); + bbr->bbr_hdrw_pacing = 1; + /* Now what is our gain status? */ + if (bbr->r_ctl.crte->rate < rate_wanted) { + /* We have a problem */ + bbr_setup_less_of_rate(bbr, cts, + bbr->r_ctl.crte->rate, rate_wanted); + } else { + /* We are good */ + bbr->gain_is_limited = 0; + bbr->skip_gain = 0; + } + tcp_bbr_tso_size_check(bbr, cts); + } else { + bbr_type_log_hdwr_pacing(bbr, + inp->inp_route.ro_rt->rt_ifp, + rate_wanted, + 0, + __LINE__, cts, err); + BBR_STAT_INC(bbr_hdwr_rl_add_fail); + } + } + if (bbr->bbr_hdrw_pacing) { + /* + * Worry about cases where the route + * changes or something happened that we + * lost our hardware pacing possibly during + * the last ip_output call. + */ + if (inp->inp_snd_tag == NULL) { + /* A change during ip output disabled hw pacing? */ + bbr->bbr_hdrw_pacing = 0; + } else if ((inp->inp_route.ro_rt == NULL) || + (inp->inp_route.ro_rt->rt_ifp != inp->inp_snd_tag->ifp)) { + /* + * We had an interface or route change, + * detach from the current hdwr pacing + * and setup to re-attempt next go + * round. + */ + bbr->bbr_hdrw_pacing = 0; + bbr->bbr_attempt_hdwr_pace = 0; + tcp_rel_pacing_rate(bbr->r_ctl.crte, bbr->rc_tp); + tcp_bbr_tso_size_check(bbr, cts); + } + } + /* + * Data sent (as far as we can tell). If this advertises a larger + * window than any other segment, then remember the size of the + * advertised window. Any pending ACK has now been sent. + */ + if (SEQ_GT(tp->rcv_nxt + recwin, tp->rcv_adv)) + tp->rcv_adv = tp->rcv_nxt + recwin; + + tp->last_ack_sent = tp->rcv_nxt; + if ((error == 0) && + (bbr->r_ctl.rc_pace_max_segs > tp->t_maxseg) && + (doing_tlp == 0) && + (tso == 0) && + (hw_tls == 0) && + (len > 0) && + ((flags & TH_RST) == 0) && + (IN_RECOVERY(tp->t_flags) == 0) && + (bbr->rc_in_persist == 0) && + ((tp->t_flags & TF_FORCEDATA) == 0) && + (tot_len < bbr->r_ctl.rc_pace_max_segs)) { + /* + * For non-tso we need to goto again until we have sent out + * enough data to match what we are hptsi out every hptsi + * interval. + */ + if (SEQ_LT(tp->snd_nxt, tp->snd_max)) { + /* Make sure snd_nxt is drug up */ + tp->snd_nxt = tp->snd_max; + } + if (rsm != NULL) { + rsm = NULL; + goto skip_again; + } + rsm = NULL; + sack_rxmit = 0; + tp->t_flags &= ~(TF_ACKNOW | TF_DELACK | TF_FORCEDATA); + goto again; + } +skip_again: + if (((flags & (TH_RST | TH_SYN | TH_FIN)) == 0) && tot_len) { + /* + * Calculate/Re-Calculate the hptsi slot in usecs based on + * what we have sent so far + */ + slot = bbr_get_pacing_delay(bbr, bbr->r_ctl.rc_bbr_hptsi_gain, tot_len, cts, 0); + if (bbr->rc_no_pacing) + slot = 0; + } + tp->t_flags &= ~(TF_ACKNOW | TF_DELACK | TF_FORCEDATA); +enobufs: + if (bbr->rc_use_google == 0) + bbr_check_bbr_for_state(bbr, cts, __LINE__, 0); + bbr_cwnd_limiting(tp, bbr, ctf_flight_size(tp, (bbr->r_ctl.rc_sacked + + bbr->r_ctl.rc_lost_bytes))); + bbr->rc_output_starts_timer = 1; + if (bbr->bbr_use_rack_cheat && + (more_to_rxt || + ((bbr->r_ctl.rc_resend = bbr_check_recovery_mode(tp, bbr, cts)) != NULL))) { + /* Rack cheats and shotguns out all rxt's 1ms apart */ + if (slot > 1000) + slot = 1000; + } + if (bbr->bbr_hdrw_pacing && (bbr->hw_pacing_set == 0)) { + /* + * We don't change the tso size until some number of sends + * to give the hardware commands time to get down + * to the interface. + */ + bbr->r_ctl.bbr_hdwr_cnt_noset_snt++; + if (bbr->r_ctl.bbr_hdwr_cnt_noset_snt >= bbr_hdwr_pacing_delay_cnt) { + bbr->hw_pacing_set = 1; + tcp_bbr_tso_size_check(bbr, cts); + } + } + bbr_start_hpts_timer(bbr, tp, cts, 12, slot, tot_len); + if (SEQ_LT(tp->snd_nxt, tp->snd_max)) { + /* Make sure snd_nxt is drug up */ + tp->snd_nxt = tp->snd_max; + } + return (error); + +} + +/* + * See bbr_output_wtime() for return values. + */ +static int +bbr_output(struct tcpcb *tp) +{ + int32_t ret; + struct timeval tv; + struct tcp_bbr *bbr; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + INP_WLOCK_ASSERT(tp->t_inpcb); + (void)tcp_get_usecs(&tv); + ret = bbr_output_wtime(tp, &tv); + return (ret); +} + +static void +bbr_mtu_chg(struct tcpcb *tp) +{ + struct tcp_bbr *bbr; + struct bbr_sendmap *rsm, *frsm = NULL; + uint32_t maxseg; + + /* + * The MTU has changed. a) Clear the sack filter. b) Mark everything + * over the current size as SACK_PASS so a retransmit will occur. + */ + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + maxseg = tp->t_maxseg - bbr->rc_last_options; + sack_filter_clear(&bbr->r_ctl.bbr_sf, tp->snd_una); + TAILQ_FOREACH(rsm, &bbr->r_ctl.rc_map, r_next) { + /* Don't mess with ones acked (by sack?) */ + if (rsm->r_flags & BBR_ACKED) + continue; + if ((rsm->r_end - rsm->r_start) > maxseg) { + /* + * We mark sack-passed on all the previous large + * sends we did. This will force them to retransmit. + */ + rsm->r_flags |= BBR_SACK_PASSED; + if (((rsm->r_flags & BBR_MARKED_LOST) == 0) && + bbr_is_lost(bbr, rsm, bbr->r_ctl.rc_rcvtime)) { + bbr->r_ctl.rc_lost_bytes += rsm->r_end - rsm->r_start; + bbr->r_ctl.rc_lost += rsm->r_end - rsm->r_start; + rsm->r_flags |= BBR_MARKED_LOST; + } + if (frsm == NULL) + frsm = rsm; + } + } + if (frsm) { + bbr->r_ctl.rc_resend = frsm; + } +} + +/* + * bbr_ctloutput() must drop the inpcb lock before performing copyin on + * socket option arguments. When it re-acquires the lock after the copy, it + * has to revalidate that the connection is still valid for the socket + * option. + */ +static int +bbr_set_sockopt(struct socket *so, struct sockopt *sopt, + struct inpcb *inp, struct tcpcb *tp, struct tcp_bbr *bbr) +{ + int32_t error = 0, optval; + + switch (sopt->sopt_name) { + case TCP_RACK_PACE_MAX_SEG: + case TCP_RACK_MIN_TO: + case TCP_RACK_REORD_THRESH: + case TCP_RACK_REORD_FADE: + case TCP_RACK_TLP_THRESH: + case TCP_RACK_PKT_DELAY: + case TCP_BBR_ALGORITHM: + case TCP_BBR_TSLIMITS: + case TCP_BBR_IWINTSO: + case TCP_BBR_RECFORCE: + case TCP_BBR_STARTUP_PG: + case TCP_BBR_DRAIN_PG: + case TCP_BBR_RWND_IS_APP: + case TCP_BBR_PROBE_RTT_INT: + case TCP_BBR_PROBE_RTT_GAIN: + case TCP_BBR_PROBE_RTT_LEN: + case TCP_BBR_STARTUP_LOSS_EXIT: + case TCP_BBR_USEDEL_RATE: + case TCP_BBR_MIN_RTO: + case TCP_BBR_MAX_RTO: + case TCP_BBR_PACE_PER_SEC: + case TCP_DELACK: + case TCP_BBR_PACE_DEL_TAR: + case TCP_BBR_SEND_IWND_IN_TSO: + case TCP_BBR_EXTRA_STATE: + case TCP_BBR_UTTER_MAX_TSO: + case TCP_BBR_MIN_TOPACEOUT: + case TCP_BBR_FLOOR_MIN_TSO: + case TCP_BBR_TSTMP_RAISES: + case TCP_BBR_POLICER_DETECT: + case TCP_BBR_USE_RACK_CHEAT: + case TCP_DATA_AFTER_CLOSE: + case TCP_BBR_HDWR_PACE: + case TCP_BBR_PACE_SEG_MAX: + case TCP_BBR_PACE_SEG_MIN: + case TCP_BBR_PACE_CROSS: + case TCP_BBR_PACE_OH: +#ifdef NETFLIX_PEAKRATE + case TCP_MAXPEAKRATE: +#endif + case TCP_BBR_TMR_PACE_OH: + case TCP_BBR_RACK_RTT_USE: + case TCP_BBR_RETRAN_WTSO: + break; + default: + return (tcp_default_ctloutput(so, sopt, inp, tp)); + break; + } + INP_WUNLOCK(inp); + error = sooptcopyin(sopt, &optval, sizeof(optval), sizeof(optval)); + if (error) + return (error); + INP_WLOCK(inp); + if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { + INP_WUNLOCK(inp); + return (ECONNRESET); + } + tp = intotcpcb(inp); + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + switch (sopt->sopt_name) { + case TCP_BBR_PACE_PER_SEC: + BBR_OPTS_INC(tcp_bbr_pace_per_sec); + bbr->r_ctl.bbr_hptsi_per_second = optval; + break; + case TCP_BBR_PACE_DEL_TAR: + BBR_OPTS_INC(tcp_bbr_pace_del_tar); + bbr->r_ctl.bbr_hptsi_segments_delay_tar = optval; + break; + case TCP_BBR_PACE_SEG_MAX: + BBR_OPTS_INC(tcp_bbr_pace_seg_max); + bbr->r_ctl.bbr_hptsi_segments_max = optval; + break; + case TCP_BBR_PACE_SEG_MIN: + BBR_OPTS_INC(tcp_bbr_pace_seg_min); + bbr->r_ctl.bbr_hptsi_bytes_min = optval; + break; + case TCP_BBR_PACE_CROSS: + BBR_OPTS_INC(tcp_bbr_pace_cross); + bbr->r_ctl.bbr_cross_over = optval; + break; + case TCP_BBR_ALGORITHM: + BBR_OPTS_INC(tcp_bbr_algorithm); + if (optval && (bbr->rc_use_google == 0)) { + /* Turn on the google mode */ + bbr_google_mode_on(bbr); + if ((optval > 3) && (optval < 500)) { + /* + * Must be at least greater than .3% + * and must be less than 50.0%. + */ + bbr->r_ctl.bbr_google_discount = optval; + } + } else if ((optval == 0) && (bbr->rc_use_google == 1)) { + /* Turn off the google mode */ + bbr_google_mode_off(bbr); + } + break; + case TCP_BBR_TSLIMITS: + BBR_OPTS_INC(tcp_bbr_tslimits); + if (optval == 1) + bbr->rc_use_ts_limit = 1; + else if (optval == 0) + bbr->rc_use_ts_limit = 0; + else + error = EINVAL; + break; + + case TCP_BBR_IWINTSO: + BBR_OPTS_INC(tcp_bbr_iwintso); + if ((optval >= 0) && (optval < 128)) { + uint32_t twin; + + bbr->rc_init_win = optval; + twin = bbr_initial_cwnd(bbr, tp); + if ((bbr->rc_past_init_win == 0) && (twin > tp->snd_cwnd)) + tp->snd_cwnd = twin; + else + error = EBUSY; + } else + error = EINVAL; + break; + case TCP_BBR_STARTUP_PG: + BBR_OPTS_INC(tcp_bbr_startup_pg); + if ((optval > 0) && (optval < BBR_MAX_GAIN_VALUE)) { + bbr->r_ctl.rc_startup_pg = optval; + if (bbr->rc_bbr_state == BBR_STATE_STARTUP) { + bbr->r_ctl.rc_bbr_hptsi_gain = optval; + } + } else + error = EINVAL; + break; + case TCP_BBR_DRAIN_PG: + BBR_OPTS_INC(tcp_bbr_drain_pg); + if ((optval > 0) && (optval < BBR_MAX_GAIN_VALUE)) + bbr->r_ctl.rc_drain_pg = optval; + else + error = EINVAL; + break; + case TCP_BBR_PROBE_RTT_LEN: + BBR_OPTS_INC(tcp_bbr_probertt_len); + if (optval <= 1) + reset_time_small(&bbr->r_ctl.rc_rttprop, (optval * USECS_IN_SECOND)); + else + error = EINVAL; + break; + case TCP_BBR_PROBE_RTT_GAIN: + BBR_OPTS_INC(tcp_bbr_probertt_gain); + if (optval <= BBR_UNIT) + bbr->r_ctl.bbr_rttprobe_gain_val = optval; + else + error = EINVAL; + break; + case TCP_BBR_PROBE_RTT_INT: + BBR_OPTS_INC(tcp_bbr_probe_rtt_int); + if (optval > 1000) + bbr->r_ctl.rc_probertt_int = optval; + else + error = EINVAL; + break; + case TCP_BBR_MIN_TOPACEOUT: + BBR_OPTS_INC(tcp_bbr_topaceout); + if (optval == 0) { + bbr->no_pacing_until = 0; + bbr->rc_no_pacing = 0; + } else if (optval <= 0x00ff) { + bbr->no_pacing_until = optval; + if ((bbr->r_ctl.rc_pkt_epoch < bbr->no_pacing_until) && + (bbr->rc_bbr_state == BBR_STATE_STARTUP)){ + /* Turn on no pacing */ + bbr->rc_no_pacing = 1; + } + } else + error = EINVAL; + break; + case TCP_BBR_STARTUP_LOSS_EXIT: + BBR_OPTS_INC(tcp_bbr_startup_loss_exit); + bbr->rc_loss_exit = optval; + break; + case TCP_BBR_USEDEL_RATE: + error = EINVAL; + break; + case TCP_BBR_MIN_RTO: + BBR_OPTS_INC(tcp_bbr_min_rto); + bbr->r_ctl.rc_min_rto_ms = optval; + break; + case TCP_BBR_MAX_RTO: + BBR_OPTS_INC(tcp_bbr_max_rto); + bbr->rc_max_rto_sec = optval; + break; + case TCP_RACK_MIN_TO: + /* Minimum time between rack t-o's in ms */ + BBR_OPTS_INC(tcp_rack_min_to); + bbr->r_ctl.rc_min_to = optval; + break; + case TCP_RACK_REORD_THRESH: + /* RACK reorder threshold (shift amount) */ + BBR_OPTS_INC(tcp_rack_reord_thresh); + if ((optval > 0) && (optval < 31)) + bbr->r_ctl.rc_reorder_shift = optval; + else + error = EINVAL; + break; + case TCP_RACK_REORD_FADE: + /* Does reordering fade after ms time */ + BBR_OPTS_INC(tcp_rack_reord_fade); + bbr->r_ctl.rc_reorder_fade = optval; + break; + case TCP_RACK_TLP_THRESH: + /* RACK TLP theshold i.e. srtt+(srtt/N) */ + BBR_OPTS_INC(tcp_rack_tlp_thresh); + if (optval) + bbr->rc_tlp_threshold = optval; + else + error = EINVAL; + break; + case TCP_BBR_USE_RACK_CHEAT: + BBR_OPTS_INC(tcp_use_rackcheat); + if (bbr->rc_use_google) { + error = EINVAL; + break; + } + BBR_OPTS_INC(tcp_rack_cheat); + if (optval) + bbr->bbr_use_rack_cheat = 1; + else + bbr->bbr_use_rack_cheat = 0; + break; + case TCP_BBR_FLOOR_MIN_TSO: + BBR_OPTS_INC(tcp_utter_max_tso); + if ((optval >= 0) && (optval < 40)) + bbr->r_ctl.bbr_hptsi_segments_floor = optval; + else + error = EINVAL; + break; + case TCP_BBR_UTTER_MAX_TSO: + BBR_OPTS_INC(tcp_utter_max_tso); + if ((optval >= 0) && (optval < 0xffff)) + bbr->r_ctl.bbr_utter_max = optval; + else + error = EINVAL; + break; + + case TCP_BBR_EXTRA_STATE: + BBR_OPTS_INC(tcp_extra_state); + if (optval) + bbr->rc_use_idle_restart = 1; + else + bbr->rc_use_idle_restart = 0; + break; + case TCP_BBR_SEND_IWND_IN_TSO: + BBR_OPTS_INC(tcp_iwnd_tso); + if (optval) { + bbr->bbr_init_win_cheat = 1; + if (bbr->rc_past_init_win == 0) { + uint32_t cts; + cts = tcp_get_usecs(&bbr->rc_tv); + tcp_bbr_tso_size_check(bbr, cts); + } + } else + bbr->bbr_init_win_cheat = 0; + break; + case TCP_BBR_HDWR_PACE: + BBR_OPTS_INC(tcp_hdwr_pacing); + if (optval){ + bbr->bbr_hdw_pace_ena = 1; + bbr->bbr_attempt_hdwr_pace = 0; + } else { + bbr->bbr_hdw_pace_ena = 0; + if (bbr->bbr_hdrw_pacing) { + bbr->bbr_hdrw_pacing = 0; + in_pcbdetach_txrtlmt(bbr->rc_inp); + } + } + break; + + case TCP_DELACK: + BBR_OPTS_INC(tcp_delack); + if (optval < 100) { + if (optval == 0) /* off */ + tp->t_delayed_ack = 0; + else if (optval == 1) /* on which is 2 */ + tp->t_delayed_ack = 2; + else /* higher than 2 and less than 100 */ + tp->t_delayed_ack = optval; + if (tp->t_flags & TF_DELACK) { + tp->t_flags &= ~TF_DELACK; + tp->t_flags |= TF_ACKNOW; + bbr_output(tp); + } + } else + error = EINVAL; + break; + case TCP_RACK_PKT_DELAY: + /* RACK added ms i.e. rack-rtt + reord + N */ + BBR_OPTS_INC(tcp_rack_pkt_delay); + bbr->r_ctl.rc_pkt_delay = optval; + break; +#ifdef NETFLIX_PEAKRATE + case TCP_MAXPEAKRATE: + BBR_OPTS_INC(tcp_maxpeak); + error = tcp_set_maxpeakrate(tp, optval); + if (!error) + tp->t_peakrate_thr = tp->t_maxpeakrate; + break; +#endif + case TCP_BBR_RETRAN_WTSO: + BBR_OPTS_INC(tcp_retran_wtso); + if (optval) + bbr->rc_resends_use_tso = 1; + else + bbr->rc_resends_use_tso = 0; + break; + case TCP_DATA_AFTER_CLOSE: + BBR_OPTS_INC(tcp_data_ac); + if (optval) + bbr->rc_allow_data_af_clo = 1; + else + bbr->rc_allow_data_af_clo = 0; + break; + case TCP_BBR_POLICER_DETECT: + BBR_OPTS_INC(tcp_policer_det); + if (bbr->rc_use_google == 0) + error = EINVAL; + else if (optval) + bbr->r_use_policer = 1; + else + bbr->r_use_policer = 0; + break; + + case TCP_BBR_TSTMP_RAISES: + BBR_OPTS_INC(tcp_ts_raises); + if (optval) + bbr->ts_can_raise = 1; + else + bbr->ts_can_raise = 0; + break; + case TCP_BBR_TMR_PACE_OH: + BBR_OPTS_INC(tcp_pacing_oh_tmr); + if (bbr->rc_use_google) { + error = EINVAL; + } else { + if (optval) + bbr->r_ctl.rc_incr_tmrs = 1; + else + bbr->r_ctl.rc_incr_tmrs = 0; + } + break; + case TCP_BBR_PACE_OH: + BBR_OPTS_INC(tcp_pacing_oh); + if (bbr->rc_use_google) { + error = EINVAL; + } else { + if (optval > (BBR_INCL_TCP_OH| + BBR_INCL_IP_OH| + BBR_INCL_ENET_OH)) { + error = EINVAL; + break; + } + if (optval & BBR_INCL_TCP_OH) + bbr->r_ctl.rc_inc_tcp_oh = 1; + else + bbr->r_ctl.rc_inc_tcp_oh = 0; + if (optval & BBR_INCL_IP_OH) + bbr->r_ctl.rc_inc_ip_oh = 1; + else + bbr->r_ctl.rc_inc_ip_oh = 0; + if (optval & BBR_INCL_ENET_OH) + bbr->r_ctl.rc_inc_enet_oh = 1; + else + bbr->r_ctl.rc_inc_enet_oh = 0; + } + break; + default: + return (tcp_default_ctloutput(so, sopt, inp, tp)); + break; + } +#ifdef NETFLIX_STATS + tcp_log_socket_option(tp, sopt->sopt_name, optval, error); +#endif + INP_WUNLOCK(inp); + return (error); +} + +/* + * return 0 on success, error-num on failure + */ +static int +bbr_get_sockopt(struct socket *so, struct sockopt *sopt, + struct inpcb *inp, struct tcpcb *tp, struct tcp_bbr *bbr) +{ + int32_t error, optval; + + /* + * Because all our options are either boolean or an int, we can just + * pull everything into optval and then unlock and copy. If we ever + * add a option that is not a int, then this will have quite an + * impact to this routine. + */ + switch (sopt->sopt_name) { + case TCP_BBR_PACE_PER_SEC: + optval = bbr->r_ctl.bbr_hptsi_per_second; + break; + case TCP_BBR_PACE_DEL_TAR: + optval = bbr->r_ctl.bbr_hptsi_segments_delay_tar; + break; + case TCP_BBR_PACE_SEG_MAX: + optval = bbr->r_ctl.bbr_hptsi_segments_max; + break; + case TCP_BBR_MIN_TOPACEOUT: + optval = bbr->no_pacing_until; + break; + case TCP_BBR_PACE_SEG_MIN: + optval = bbr->r_ctl.bbr_hptsi_bytes_min; + break; + case TCP_BBR_PACE_CROSS: + optval = bbr->r_ctl.bbr_cross_over; + break; + case TCP_BBR_ALGORITHM: + optval = bbr->rc_use_google; + break; + case TCP_BBR_TSLIMITS: + optval = bbr->rc_use_ts_limit; + break; + case TCP_BBR_IWINTSO: + optval = bbr->rc_init_win; + break; + case TCP_BBR_STARTUP_PG: + optval = bbr->r_ctl.rc_startup_pg; + break; + case TCP_BBR_DRAIN_PG: + optval = bbr->r_ctl.rc_drain_pg; + break; + case TCP_BBR_PROBE_RTT_INT: + optval = bbr->r_ctl.rc_probertt_int; + break; + case TCP_BBR_PROBE_RTT_LEN: + optval = (bbr->r_ctl.rc_rttprop.cur_time_limit / USECS_IN_SECOND); + break; + case TCP_BBR_PROBE_RTT_GAIN: + optval = bbr->r_ctl.bbr_rttprobe_gain_val; + break; + case TCP_BBR_STARTUP_LOSS_EXIT: + optval = bbr->rc_loss_exit; + break; + case TCP_BBR_USEDEL_RATE: + error = EINVAL; + break; + case TCP_BBR_MIN_RTO: + optval = bbr->r_ctl.rc_min_rto_ms; + break; + case TCP_BBR_MAX_RTO: + optval = bbr->rc_max_rto_sec; + break; + case TCP_RACK_PACE_MAX_SEG: + /* Max segments in a pace */ + optval = bbr->r_ctl.rc_pace_max_segs; + break; + case TCP_RACK_MIN_TO: + /* Minimum time between rack t-o's in ms */ + optval = bbr->r_ctl.rc_min_to; + break; + case TCP_RACK_REORD_THRESH: + /* RACK reorder threshold (shift amount) */ + optval = bbr->r_ctl.rc_reorder_shift; + break; + case TCP_RACK_REORD_FADE: + /* Does reordering fade after ms time */ + optval = bbr->r_ctl.rc_reorder_fade; + break; + case TCP_BBR_USE_RACK_CHEAT: + /* Do we use the rack cheat for rxt */ + optval = bbr->bbr_use_rack_cheat; + break; + case TCP_BBR_FLOOR_MIN_TSO: + optval = bbr->r_ctl.bbr_hptsi_segments_floor; + break; + case TCP_BBR_UTTER_MAX_TSO: + optval = bbr->r_ctl.bbr_utter_max; + break; + case TCP_BBR_SEND_IWND_IN_TSO: + /* Do we send TSO size segments initially */ + optval = bbr->bbr_init_win_cheat; + break; + case TCP_BBR_EXTRA_STATE: + optval = bbr->rc_use_idle_restart; + break; + case TCP_RACK_TLP_THRESH: + /* RACK TLP theshold i.e. srtt+(srtt/N) */ + optval = bbr->rc_tlp_threshold; + break; + case TCP_RACK_PKT_DELAY: + /* RACK added ms i.e. rack-rtt + reord + N */ + optval = bbr->r_ctl.rc_pkt_delay; + break; + case TCP_BBR_RETRAN_WTSO: + optval = bbr->rc_resends_use_tso; + break; + case TCP_DATA_AFTER_CLOSE: + optval = bbr->rc_allow_data_af_clo; + break; + case TCP_DELACK: + optval = tp->t_delayed_ack; + break; + case TCP_BBR_HDWR_PACE: + optval = bbr->bbr_hdw_pace_ena; + break; + case TCP_BBR_POLICER_DETECT: + optval = bbr->r_use_policer; + break; + case TCP_BBR_TSTMP_RAISES: + optval = bbr->ts_can_raise; + break; + case TCP_BBR_TMR_PACE_OH: + optval = bbr->r_ctl.rc_incr_tmrs; + break; + case TCP_BBR_PACE_OH: + optval = 0; + if (bbr->r_ctl.rc_inc_tcp_oh) + optval |= BBR_INCL_TCP_OH; + if (bbr->r_ctl.rc_inc_ip_oh) + optval |= BBR_INCL_IP_OH; + if (bbr->r_ctl.rc_inc_enet_oh) + optval |= BBR_INCL_ENET_OH; + break; + default: + return (tcp_default_ctloutput(so, sopt, inp, tp)); + break; + } + INP_WUNLOCK(inp); + error = sooptcopyout(sopt, &optval, sizeof optval); + return (error); +} + +/* + * return 0 on success, error-num on failure + */ +static int +bbr_ctloutput(struct socket *so, struct sockopt *sopt, struct inpcb *inp, struct tcpcb *tp) +{ + int32_t error = EINVAL; + struct tcp_bbr *bbr; + + bbr = (struct tcp_bbr *)tp->t_fb_ptr; + if (bbr == NULL) { + /* Huh? */ + goto out; + } + if (sopt->sopt_dir == SOPT_SET) { + return (bbr_set_sockopt(so, sopt, inp, tp, bbr)); + } else if (sopt->sopt_dir == SOPT_GET) { + return (bbr_get_sockopt(so, sopt, inp, tp, bbr)); + } +out: + INP_WUNLOCK(inp); + return (error); +} + + +struct tcp_function_block __tcp_bbr = { + .tfb_tcp_block_name = __XSTRING(STACKNAME), + .tfb_tcp_output = bbr_output, + .tfb_do_queued_segments = ctf_do_queued_segments, + .tfb_do_segment_nounlock = bbr_do_segment_nounlock, + .tfb_tcp_do_segment = bbr_do_segment, + .tfb_tcp_ctloutput = bbr_ctloutput, + .tfb_tcp_fb_init = bbr_init, + .tfb_tcp_fb_fini = bbr_fini, + .tfb_tcp_timer_stop_all = bbr_stopall, + .tfb_tcp_timer_activate = bbr_timer_activate, + .tfb_tcp_timer_active = bbr_timer_active, + .tfb_tcp_timer_stop = bbr_timer_stop, + .tfb_tcp_rexmit_tmr = bbr_remxt_tmr, + .tfb_tcp_handoff_ok = bbr_handoff_ok, + .tfb_tcp_mtu_chg = bbr_mtu_chg +}; + +static const char *bbr_stack_names[] = { + __XSTRING(STACKNAME), +#ifdef STACKALIAS + __XSTRING(STACKALIAS), +#endif +}; + +static bool bbr_mod_inited = false; + +static int +tcp_addbbr(module_t mod, int32_t type, void *data) +{ + int32_t err = 0; + int num_stacks; + + switch (type) { + case MOD_LOAD: + printf("Attempting to load " __XSTRING(MODNAME) "\n"); + bbr_zone = uma_zcreate(__XSTRING(MODNAME) "_map", + sizeof(struct bbr_sendmap), + NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); + bbr_pcb_zone = uma_zcreate(__XSTRING(MODNAME) "_pcb", + sizeof(struct tcp_bbr), + NULL, NULL, NULL, NULL, UMA_ALIGN_CACHE, 0); + sysctl_ctx_init(&bbr_sysctl_ctx); + bbr_sysctl_root = SYSCTL_ADD_NODE(&bbr_sysctl_ctx, + SYSCTL_STATIC_CHILDREN(_net_inet_tcp), + OID_AUTO, +#ifdef STACKALIAS + __XSTRING(STACKALIAS), +#else + __XSTRING(STACKNAME), +#endif + CTLFLAG_RW, 0, + ""); + if (bbr_sysctl_root == NULL) { + printf("Failed to add sysctl node\n"); + err = EFAULT; + goto free_uma; + } + bbr_init_sysctls(); + num_stacks = nitems(bbr_stack_names); + err = register_tcp_functions_as_names(&__tcp_bbr, M_WAITOK, + bbr_stack_names, &num_stacks); + if (err) { + printf("Failed to register %s stack name for " + "%s module\n", bbr_stack_names[num_stacks], + __XSTRING(MODNAME)); + sysctl_ctx_free(&bbr_sysctl_ctx); + free_uma: + uma_zdestroy(bbr_zone); + uma_zdestroy(bbr_pcb_zone); + bbr_counter_destroy(); + printf("Failed to register " __XSTRING(MODNAME) + " module err:%d\n", err); + return (err); + } + tcp_lro_reg_mbufq(); + bbr_mod_inited = true; + printf(__XSTRING(MODNAME) " is now available\n"); + break; + case MOD_QUIESCE: + err = deregister_tcp_functions(&__tcp_bbr, true, false); + break; + case MOD_UNLOAD: + err = deregister_tcp_functions(&__tcp_bbr, false, true); + if (err == EBUSY) + break; + if (bbr_mod_inited) { + uma_zdestroy(bbr_zone); + uma_zdestroy(bbr_pcb_zone); + sysctl_ctx_free(&bbr_sysctl_ctx); + bbr_counter_destroy(); + printf(__XSTRING(MODNAME) + " is now no longer available\n"); + bbr_mod_inited = false; + } + tcp_lro_dereg_mbufq(); + err = 0; + break; + default: + return (EOPNOTSUPP); + } + return (err); +} + +static moduledata_t tcp_bbr = { + .name = __XSTRING(MODNAME), + .evhand = tcp_addbbr, + .priv = 0 +}; + +MODULE_VERSION(MODNAME, 1); +DECLARE_MODULE(MODNAME, tcp_bbr, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY); +MODULE_DEPEND(MODNAME, tcphpts, 1, 1, 1); Property changes on: head/sys/netinet/tcp_stacks/bbr.c ___________________________________________________________________ Added: svn:eol-style ## -0,0 +1 ## +native \ No newline at end of property Added: svn:keywords ## -0,0 +1 ## +FreeBSD=%H \ No newline at end of property Added: svn:mime-type ## -0,0 +1 ## +text/plain \ No newline at end of property Index: head/sys/netinet/tcp_stacks/rack.c =================================================================== --- head/sys/netinet/tcp_stacks/rack.c (revision 352656) +++ head/sys/netinet/tcp_stacks/rack.c (revision 352657) @@ -1,9261 +1,10573 @@ /*- - * Copyright (c) 2016-2019 - * Netflix Inc. All rights reserved. + * Copyright (c) 2016-2019 Netflix, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" #include "opt_tcpdebug.h" - +#include "opt_ratelimit.h" +#include "opt_kern_tls.h" #include #include #include #ifdef TCP_HHOOK #include #endif #include #include #include #include #include #include /* for proc0 declaration */ -#ifdef NETFLIX_STATS -#include -#endif #include #include +#ifdef KERN_TLS +#include +#endif #include #include -#include #ifdef NETFLIX_STATS +#include +#include #include /* Must come after qmath.h and tree.h */ #endif #include +#include #include #include #include #include #include #include #include #define TCPSTATES /* for logging */ #include #include #include #include #include /* required for icmp_var.h */ #include /* for ICMP_BANDLIM */ #include #include #include #include -#define TCPOUTFLAGS #include +#define TCPOUTFLAGS #include #include #include #include #include #include #include #include #include +#include #ifdef TCPDEBUG #include #endif /* TCPDEBUG */ #ifdef TCP_OFFLOAD #include #endif #ifdef INET6 #include #endif #include #if defined(IPSEC) || defined(IPSEC_SUPPORT) #include #include #endif /* IPSEC */ #include #include #include #ifdef MAC #include #endif #include "sack_filter.h" #include "tcp_rack.h" #include "rack_bbr_common.h" uma_zone_t rack_zone; uma_zone_t rack_pcb_zone; #ifndef TICKS2SBT #define TICKS2SBT(__t) (tick_sbt * ((sbintime_t)(__t))) #endif struct sysctl_ctx_list rack_sysctl_ctx; struct sysctl_oid *rack_sysctl_root; #define CUM_ACKED 1 #define SACKED 2 /* * The RACK module incorporates a number of * TCP ideas that have been put out into the IETF * over the last few years: * - Matt Mathis's Rate Halving which slowly drops * the congestion window so that the ack clock can * be maintained during a recovery. * - Yuchung Cheng's RACK TCP (for which its named) that * will stop us using the number of dup acks and instead * use time as the gage of when we retransmit. * - Reorder Detection of RFC4737 and the Tail-Loss probe draft * of Dukkipati et.al. * RACK depends on SACK, so if an endpoint arrives that * cannot do SACK the state machine below will shuttle the * connection back to using the "default" TCP stack that is * in FreeBSD. * * To implement RACK the original TCP stack was first decomposed * into a functional state machine with individual states * for each of the possible TCP connection states. The do_segement * functions role in life is to mandate the connection supports SACK * initially and then assure that the RACK state matches the conenction * state before calling the states do_segment function. Each * state is simplified due to the fact that the original do_segment * has been decomposed and we *know* what state we are in (no * switches on the state) and all tests for SACK are gone. This * greatly simplifies what each state does. * * TCP output is also over-written with a new version since it * must maintain the new rack scoreboard. * */ -static int32_t rack_precache = 1; static int32_t rack_tlp_thresh = 1; static int32_t rack_reorder_thresh = 2; static int32_t rack_reorder_fade = 60000; /* 0 - never fade, def 60,000 * - 60 seconds */ +/* Attack threshold detections */ +static uint32_t rack_highest_sack_thresh_seen = 0; +static uint32_t rack_highest_move_thresh_seen = 0; + static int32_t rack_pkt_delay = 1; -static int32_t rack_inc_var = 0;/* For TLP */ -static int32_t rack_reduce_largest_on_idle = 0; static int32_t rack_min_pace_time = 0; -static int32_t rack_min_pace_time_seg_req=6; static int32_t rack_early_recovery = 1; -static int32_t rack_early_recovery_max_seg = 6; static int32_t rack_send_a_lot_in_prr = 1; static int32_t rack_min_to = 1; /* Number of ms minimum timeout */ -static int32_t rack_tlp_in_recovery = 1; /* Can we do TLP in recovery? */ static int32_t rack_verbose_logging = 0; static int32_t rack_ignore_data_after_close = 1; -static int32_t rack_map_entries_limit = 1024; -static int32_t rack_map_split_limit = 256; +static int32_t use_rack_cheat = 1; +static int32_t rack_persist_min = 250; /* 250ms */ +static int32_t rack_persist_max = 1000; /* 1 Second */ +static int32_t rack_sack_not_required = 0; /* set to one to allow non-sack to use rack */ +static int32_t rack_hw_tls_max_seg = 0; /* 0 means use hw-tls single segment */ +/* Sack attack detection thresholds and such */ +static int32_t tcp_force_detection = 0; + +#ifdef NETFLIX_EXP_DETECTION +static int32_t tcp_sack_to_ack_thresh = 700; /* 70 % */ +static int32_t tcp_sack_to_move_thresh = 600; /* 60 % */ +static int32_t tcp_restoral_thresh = 650; /* 65 % (sack:2:ack -5%) */ +static int32_t tcp_attack_on_turns_on_logging = 0; +static int32_t tcp_map_minimum = 500; +#endif +static int32_t tcp_sad_decay_val = 800; +static int32_t tcp_sad_pacing_interval = 2000; +static int32_t tcp_sad_low_pps = 100; + + /* * Currently regular tcp has a rto_min of 30ms * the backoff goes 12 times so that ends up * being a total of 122.850 seconds before a * connection is killed. */ static int32_t rack_tlp_min = 10; static int32_t rack_rto_min = 30; /* 30ms same as main freebsd */ -static int32_t rack_rto_max = 30000; /* 30 seconds */ +static int32_t rack_rto_max = 4000; /* 4 seconds */ static const int32_t rack_free_cache = 2; static int32_t rack_hptsi_segments = 40; static int32_t rack_rate_sample_method = USE_RTT_LOW; -static int32_t rack_pace_every_seg = 1; +static int32_t rack_pace_every_seg = 0; static int32_t rack_delayed_ack_time = 200; /* 200ms */ static int32_t rack_slot_reduction = 4; static int32_t rack_lower_cwnd_at_tlp = 0; static int32_t rack_use_proportional_reduce = 0; static int32_t rack_proportional_rate = 10; static int32_t rack_tlp_max_resend = 2; static int32_t rack_limited_retran = 0; static int32_t rack_always_send_oldest = 0; -static int32_t rack_sack_block_limit = 128; static int32_t rack_use_sack_filter = 1; static int32_t rack_tlp_threshold_use = TLP_USE_TWO_ONE; +static int32_t rack_per_of_gp = 50; +static int32_t rack_tcp_map_entries_limit = 1500; +static int32_t rack_tcp_map_split_limit = 256; + /* Rack specific counters */ counter_u64_t rack_badfr; counter_u64_t rack_badfr_bytes; counter_u64_t rack_rtm_prr_retran; counter_u64_t rack_rtm_prr_newdata; counter_u64_t rack_timestamp_mismatch; counter_u64_t rack_reorder_seen; counter_u64_t rack_paced_segments; counter_u64_t rack_unpaced_segments; +counter_u64_t rack_calc_zero; +counter_u64_t rack_calc_nonzero; counter_u64_t rack_saw_enobuf; counter_u64_t rack_saw_enetunreach; +counter_u64_t rack_per_timer_hole; /* Tail loss probe counters */ counter_u64_t rack_tlp_tot; counter_u64_t rack_tlp_newdata; counter_u64_t rack_tlp_retran; counter_u64_t rack_tlp_retran_bytes; counter_u64_t rack_tlp_retran_fail; counter_u64_t rack_to_tot; counter_u64_t rack_to_arm_rack; counter_u64_t rack_to_arm_tlp; counter_u64_t rack_to_alloc; counter_u64_t rack_to_alloc_hard; counter_u64_t rack_to_alloc_emerg; counter_u64_t rack_to_alloc_limited; counter_u64_t rack_alloc_limited_conns; counter_u64_t rack_split_limited; counter_u64_t rack_sack_proc_all; counter_u64_t rack_sack_proc_short; counter_u64_t rack_sack_proc_restart; -counter_u64_t rack_runt_sacks; +counter_u64_t rack_sack_attacks_detected; +counter_u64_t rack_sack_attacks_reversed; +counter_u64_t rack_sack_used_next_merge; +counter_u64_t rack_sack_splits; +counter_u64_t rack_sack_used_prev_merge; +counter_u64_t rack_sack_skipped_acked; +counter_u64_t rack_ack_total; +counter_u64_t rack_express_sack; +counter_u64_t rack_sack_total; +counter_u64_t rack_move_none; +counter_u64_t rack_move_some; + counter_u64_t rack_used_tlpmethod; counter_u64_t rack_used_tlpmethod2; counter_u64_t rack_enter_tlp_calc; counter_u64_t rack_input_idle_reduces; +counter_u64_t rack_collapsed_win; counter_u64_t rack_tlp_does_nada; +/* Counters for HW TLS */ +counter_u64_t rack_tls_rwnd; +counter_u64_t rack_tls_cwnd; +counter_u64_t rack_tls_app; +counter_u64_t rack_tls_other; +counter_u64_t rack_tls_filled; +counter_u64_t rack_tls_rxt; +counter_u64_t rack_tls_tlp; + /* Temp CPU counters */ counter_u64_t rack_find_high; counter_u64_t rack_progress_drops; counter_u64_t rack_out_size[TCP_MSS_ACCT_SIZE]; counter_u64_t rack_opts_arry[RACK_OPTS_SIZE]; -/* - * This was originally defined in tcp_timer.c, but is now reproduced here given - * the unification of the SYN and non-SYN retransmit timer exponents combined - * with wanting to retain previous behaviour for previously deployed stack - * versions. - */ -int tcp_syn_backoff[TCP_MAXRXTSHIFT + 1] = - { 1, 1, 1, 1, 1, 2, 4, 8, 16, 32, 64, 64, 64 }; - static void rack_log_progress_event(struct tcp_rack *rack, struct tcpcb *tp, uint32_t tick, int event, int line); static int rack_process_ack(struct mbuf *m, struct tcphdr *th, - struct socket *so, struct tcpcb *tp, struct tcpopt *to, + struct socket *so, struct tcpcb *tp, struct tcpopt *to, uint32_t tiwin, int32_t tlen, int32_t * ofia, int32_t thflags, int32_t * ret_val); static int rack_process_data(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt); static void rack_ack_received(struct tcpcb *tp, struct tcp_rack *rack, struct tcphdr *th, uint16_t nsegs, uint16_t type, int32_t recovery); static struct rack_sendmap *rack_alloc(struct tcp_rack *rack); static struct rack_sendmap *rack_alloc_limit(struct tcp_rack *rack, uint8_t limit_type); static struct rack_sendmap * rack_check_recovery_mode(struct tcpcb *tp, uint32_t tsused); static void rack_cong_signal(struct tcpcb *tp, struct tcphdr *th, uint32_t type); static void rack_counter_destroy(void); static int rack_ctloutput(struct socket *so, struct sockopt *sopt, struct inpcb *inp, struct tcpcb *tp); static int32_t rack_ctor(void *mem, int32_t size, void *arg, int32_t how); static void rack_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, int32_t drop_hdrlen, int32_t tlen, uint8_t iptos); static void rack_dtor(void *mem, int32_t size, void *arg); static void rack_earlier_retran(struct tcpcb *tp, struct rack_sendmap *rsm, uint32_t t, uint32_t cts); static struct rack_sendmap * rack_find_high_nonack(struct tcp_rack *rack, struct rack_sendmap *rsm); static struct rack_sendmap *rack_find_lowest_rsm(struct tcp_rack *rack); static void rack_free(struct tcp_rack *rack, struct rack_sendmap *rsm); static void rack_fini(struct tcpcb *tp, int32_t tcb_is_purged); static int rack_get_sockopt(struct socket *so, struct sockopt *sopt, struct inpcb *inp, struct tcpcb *tp, struct tcp_rack *rack); static int32_t rack_handoff_ok(struct tcpcb *tp); static int32_t rack_init(struct tcpcb *tp); static void rack_init_sysctls(void); static void rack_log_ack(struct tcpcb *tp, struct tcpopt *to, struct tcphdr *th); static void rack_log_output(struct tcpcb *tp, struct tcpopt *to, int32_t len, uint32_t seq_out, uint8_t th_flags, int32_t err, uint32_t ts, uint8_t pass, struct rack_sendmap *hintrsm); static void rack_log_sack_passed(struct tcpcb *tp, struct tcp_rack *rack, struct rack_sendmap *rsm); -static void rack_log_to_event(struct tcp_rack *rack, int32_t to_num); +static void rack_log_to_event(struct tcp_rack *rack, int32_t to_num, int num); static int32_t rack_output(struct tcpcb *tp); -static void -rack_hpts_do_segment(struct mbuf *m, struct tcphdr *th, - struct socket *so, struct tcpcb *tp, int32_t drop_hdrlen, int32_t tlen, - uint8_t iptos, int32_t nxt_pkt, struct timeval *tv); static uint32_t rack_proc_sack_blk(struct tcpcb *tp, struct tcp_rack *rack, struct sackblk *sack, struct tcpopt *to, struct rack_sendmap **prsm, - uint32_t cts); + uint32_t cts, int *moved_two); static void rack_post_recovery(struct tcpcb *tp, struct tcphdr *th); static void rack_remxt_tmr(struct tcpcb *tp); static int rack_set_sockopt(struct socket *so, struct sockopt *sopt, struct inpcb *inp, struct tcpcb *tp, struct tcp_rack *rack); static void rack_set_state(struct tcpcb *tp, struct tcp_rack *rack); static int32_t rack_stopall(struct tcpcb *tp); static void rack_timer_activate(struct tcpcb *tp, uint32_t timer_type, uint32_t delta); static int32_t rack_timer_active(struct tcpcb *tp, uint32_t timer_type); static void rack_timer_cancel(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts, int line); static void rack_timer_stop(struct tcpcb *tp, uint32_t timer_type); static uint32_t rack_update_entry(struct tcpcb *tp, struct tcp_rack *rack, struct rack_sendmap *rsm, uint32_t ts, int32_t * lenp); static void rack_update_rsm(struct tcpcb *tp, struct tcp_rack *rack, struct rack_sendmap *rsm, uint32_t ts); static int rack_update_rtt(struct tcpcb *tp, struct tcp_rack *rack, struct rack_sendmap *rsm, struct tcpopt *to, uint32_t cts, int32_t ack_type); static int32_t tcp_addrack(module_t mod, int32_t type, void *data); -static void -rack_challenge_ack(struct mbuf *m, struct tcphdr *th, - struct tcpcb *tp, int32_t * ret_val); static int rack_do_close_wait(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt); static int rack_do_closing(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt); -static void rack_do_drop(struct mbuf *m, struct tcpcb *tp); -static void -rack_do_dropafterack(struct mbuf *m, struct tcpcb *tp, - struct tcphdr *th, int32_t thflags, int32_t tlen, int32_t * ret_val); -static void -rack_do_dropwithreset(struct mbuf *m, struct tcpcb *tp, - struct tcphdr *th, int32_t rstreason, int32_t tlen); static int rack_do_established(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt); static int rack_do_fastnewdata(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t nxt_pkt); static int rack_do_fin_wait_1(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt); static int rack_do_fin_wait_2(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt); static int rack_do_lastack(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt); static int rack_do_syn_recv(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt); static int rack_do_syn_sent(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt); -static int -rack_drop_checks(struct tcpopt *to, struct mbuf *m, - struct tcphdr *th, struct tcpcb *tp, int32_t * tlenp, int32_t * thf, - int32_t * drop_hdrlen, int32_t * ret_val); -static int -rack_process_rst(struct mbuf *m, struct tcphdr *th, - struct socket *so, struct tcpcb *tp); struct rack_sendmap * tcp_rack_output(struct tcpcb *tp, struct tcp_rack *rack, uint32_t tsused); static void tcp_rack_xmit_timer(struct tcp_rack *rack, int32_t rtt); static void tcp_rack_partialack(struct tcpcb *tp, struct tcphdr *th); -static int -rack_ts_check(struct mbuf *m, struct tcphdr *th, - struct tcpcb *tp, int32_t tlen, int32_t thflags, int32_t * ret_val); - int32_t rack_clear_counter=0; static int sysctl_rack_clear(SYSCTL_HANDLER_ARGS) { uint32_t stat; int32_t error; error = SYSCTL_OUT(req, &rack_clear_counter, sizeof(uint32_t)); if (error || req->newptr == NULL) return error; error = SYSCTL_IN(req, &stat, sizeof(uint32_t)); if (error) return (error); if (stat == 1) { #ifdef INVARIANTS printf("Clearing RACK counters\n"); #endif counter_u64_zero(rack_badfr); counter_u64_zero(rack_badfr_bytes); counter_u64_zero(rack_rtm_prr_retran); counter_u64_zero(rack_rtm_prr_newdata); counter_u64_zero(rack_timestamp_mismatch); counter_u64_zero(rack_reorder_seen); counter_u64_zero(rack_tlp_tot); counter_u64_zero(rack_tlp_newdata); counter_u64_zero(rack_tlp_retran); counter_u64_zero(rack_tlp_retran_bytes); counter_u64_zero(rack_tlp_retran_fail); counter_u64_zero(rack_to_tot); counter_u64_zero(rack_to_arm_rack); counter_u64_zero(rack_to_arm_tlp); counter_u64_zero(rack_paced_segments); + counter_u64_zero(rack_calc_zero); + counter_u64_zero(rack_calc_nonzero); counter_u64_zero(rack_unpaced_segments); counter_u64_zero(rack_saw_enobuf); counter_u64_zero(rack_saw_enetunreach); + counter_u64_zero(rack_per_timer_hole); counter_u64_zero(rack_to_alloc_hard); counter_u64_zero(rack_to_alloc_emerg); counter_u64_zero(rack_sack_proc_all); counter_u64_zero(rack_sack_proc_short); counter_u64_zero(rack_sack_proc_restart); counter_u64_zero(rack_to_alloc); counter_u64_zero(rack_to_alloc_limited); counter_u64_zero(rack_alloc_limited_conns); counter_u64_zero(rack_split_limited); counter_u64_zero(rack_find_high); - counter_u64_zero(rack_runt_sacks); + counter_u64_zero(rack_tls_rwnd); + counter_u64_zero(rack_tls_cwnd); + counter_u64_zero(rack_tls_app); + counter_u64_zero(rack_tls_other); + counter_u64_zero(rack_tls_filled); + counter_u64_zero(rack_tls_rxt); + counter_u64_zero(rack_tls_tlp); + counter_u64_zero(rack_sack_attacks_detected); + counter_u64_zero(rack_sack_attacks_reversed); + counter_u64_zero(rack_sack_used_next_merge); + counter_u64_zero(rack_sack_used_prev_merge); + counter_u64_zero(rack_sack_splits); + counter_u64_zero(rack_sack_skipped_acked); + counter_u64_zero(rack_ack_total); + counter_u64_zero(rack_express_sack); + counter_u64_zero(rack_sack_total); + counter_u64_zero(rack_move_none); + counter_u64_zero(rack_move_some); counter_u64_zero(rack_used_tlpmethod); counter_u64_zero(rack_used_tlpmethod2); counter_u64_zero(rack_enter_tlp_calc); counter_u64_zero(rack_progress_drops); counter_u64_zero(rack_tlp_does_nada); + counter_u64_zero(rack_collapsed_win); + } rack_clear_counter = 0; return (0); } static void rack_init_sysctls() { + struct sysctl_oid *rack_counters; + struct sysctl_oid *rack_attack; + SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), - OID_AUTO, "map_limit", CTLFLAG_RW, - &rack_map_entries_limit , 1024, - "Is there a limit on how big the sendmap can grow? "); - - SYSCTL_ADD_S32(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), - OID_AUTO, "map_splitlimit", CTLFLAG_RW, - &rack_map_split_limit , 256, - "Is there a limit on how much splitting a peer can do?"); - - SYSCTL_ADD_S32(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "rate_sample_method", CTLFLAG_RW, &rack_rate_sample_method , USE_RTT_LOW, "What method should we use for rate sampling 0=high, 1=low "); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), + OID_AUTO, "hw_tlsmax", CTLFLAG_RW, + &rack_hw_tls_max_seg , 0, + "Do we have a multplier of TLS records we can send as a max (0=1 TLS record)? "); + SYSCTL_ADD_S32(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "data_after_close", CTLFLAG_RW, &rack_ignore_data_after_close, 0, "Do we hold off sending a RST until all pending data is ack'd"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), + OID_AUTO, "cheat_rxt", CTLFLAG_RW, + &use_rack_cheat, 1, + "Do we use the rxt cheat for rack?"); + + SYSCTL_ADD_U32(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_sysctl_root), + OID_AUTO, "persmin", CTLFLAG_RW, + &rack_persist_min, 250, + "What is the minimum time in milliseconds between persists"); + SYSCTL_ADD_U32(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_sysctl_root), + OID_AUTO, "persmax", CTLFLAG_RW, + &rack_persist_max, 1000, + "What is the largest delay in milliseconds between persists"); + SYSCTL_ADD_S32(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_sysctl_root), + OID_AUTO, "no_sack_needed", CTLFLAG_RW, + &rack_sack_not_required, 0, + "Do we allow rack to run on connections not supporting SACK?"); + SYSCTL_ADD_S32(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "tlpmethod", CTLFLAG_RW, &rack_tlp_threshold_use, TLP_USE_TWO_ONE, "What method do we do for TLP time calc 0=no-de-ack-comp, 1=ID, 2=2.1, 3=2.2"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), + OID_AUTO, "gp_percentage", CTLFLAG_RW, + &rack_per_of_gp, 50, + "Do we pace to percentage of goodput (0=old method)?"); + SYSCTL_ADD_S32(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "min_pace_time", CTLFLAG_RW, &rack_min_pace_time, 0, "Should we enforce a minimum pace time of 1ms"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), - OID_AUTO, "min_pace_segs", CTLFLAG_RW, - &rack_min_pace_time_seg_req, 6, - "How many segments have to be in the len to enforce min-pace-time"); - SYSCTL_ADD_S32(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), - OID_AUTO, "idle_reduce_high", CTLFLAG_RW, - &rack_reduce_largest_on_idle, 0, - "Should we reduce the largest cwnd seen to IW on idle reduction"); - SYSCTL_ADD_S32(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "bb_verbose", CTLFLAG_RW, &rack_verbose_logging, 0, "Should RACK black box logging be verbose"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "sackfiltering", CTLFLAG_RW, &rack_use_sack_filter, 1, "Do we use sack filtering?"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "delayed_ack", CTLFLAG_RW, &rack_delayed_ack_time, 200, "Delayed ack time (200ms)"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "tlpminto", CTLFLAG_RW, &rack_tlp_min, 10, "TLP minimum timeout per the specification (10ms)"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), - OID_AUTO, "precache", CTLFLAG_RW, - &rack_precache, 0, - "Where should we precache the mcopy (0 is not at all)"); - SYSCTL_ADD_S32(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), - OID_AUTO, "sblklimit", CTLFLAG_RW, - &rack_sack_block_limit, 128, - "When do we start paying attention to small sack blocks"); - SYSCTL_ADD_S32(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "send_oldest", CTLFLAG_RW, &rack_always_send_oldest, 1, "Should we always send the oldest TLP and RACK-TLP"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), - OID_AUTO, "rack_tlp_in_recovery", CTLFLAG_RW, - &rack_tlp_in_recovery, 1, - "Can we do a TLP during recovery?"); - SYSCTL_ADD_S32(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "rack_tlimit", CTLFLAG_RW, &rack_limited_retran, 0, "How many times can a rack timeout drive out sends"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "minrto", CTLFLAG_RW, &rack_rto_min, 0, "Minimum RTO in ms -- set with caution below 1000 due to TLP"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "maxrto", CTLFLAG_RW, &rack_rto_max, 0, "Maxiumum RTO in ms -- should be at least as large as min_rto"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "tlp_retry", CTLFLAG_RW, &rack_tlp_max_resend, 2, "How many times does TLP retry a single segment or multiple with no ACK"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "recovery_loss_prop", CTLFLAG_RW, &rack_use_proportional_reduce, 0, "Should we proportionaly reduce cwnd based on the number of losses "); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "recovery_prop", CTLFLAG_RW, &rack_proportional_rate, 10, "What percent reduction per loss"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "tlp_cwnd_flag", CTLFLAG_RW, &rack_lower_cwnd_at_tlp, 0, "When a TLP completes a retran should we enter recovery?"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "hptsi_reduces", CTLFLAG_RW, &rack_slot_reduction, 4, "When setting a slot should we reduce by divisor"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "hptsi_every_seg", CTLFLAG_RW, - &rack_pace_every_seg, 1, - "Should we pace out every segment hptsi"); + &rack_pace_every_seg, 0, + "Should we use the original pacing mechanism that did not pace much?"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "hptsi_seg_max", CTLFLAG_RW, - &rack_hptsi_segments, 6, + &rack_hptsi_segments, 40, "Should we pace out only a limited size of segments"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "prr_sendalot", CTLFLAG_RW, &rack_send_a_lot_in_prr, 1, "Send a lot in prr"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "minto", CTLFLAG_RW, &rack_min_to, 1, "Minimum rack timeout in milliseconds"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), - OID_AUTO, "earlyrecoveryseg", CTLFLAG_RW, - &rack_early_recovery_max_seg, 6, - "Max segments in early recovery"); - SYSCTL_ADD_S32(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "earlyrecovery", CTLFLAG_RW, &rack_early_recovery, 1, "Do we do early recovery with rack"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "reorder_thresh", CTLFLAG_RW, &rack_reorder_thresh, 2, "What factor for rack will be added when seeing reordering (shift right)"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "rtt_tlp_thresh", CTLFLAG_RW, &rack_tlp_thresh, 1, "what divisor for TLP rtt/retran will be added (1=rtt, 2=1/2 rtt etc)"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "reorder_fade", CTLFLAG_RW, &rack_reorder_fade, 0, "Does reorder detection fade, if so how many ms (0 means never)"); SYSCTL_ADD_S32(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "pktdelay", CTLFLAG_RW, &rack_pkt_delay, 1, "Extra RACK time (in ms) besides reordering thresh"); - SYSCTL_ADD_S32(&rack_sysctl_ctx, + + rack_counters = SYSCTL_ADD_NODE(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), - OID_AUTO, "inc_var", CTLFLAG_RW, - &rack_inc_var, 0, - "Should rack add to the TLP timer the variance in rtt calculation"); + OID_AUTO, + "stats", + CTLFLAG_RW, 0, + "Rack Counters"); rack_badfr = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "badfr", CTLFLAG_RD, &rack_badfr, "Total number of bad FRs"); rack_badfr_bytes = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "badfr_bytes", CTLFLAG_RD, &rack_badfr_bytes, "Total number of bad FRs"); rack_rtm_prr_retran = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "prrsndret", CTLFLAG_RD, &rack_rtm_prr_retran, "Total number of prr based retransmits"); rack_rtm_prr_newdata = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "prrsndnew", CTLFLAG_RD, &rack_rtm_prr_newdata, "Total number of prr based new transmits"); rack_timestamp_mismatch = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "tsnf", CTLFLAG_RD, &rack_timestamp_mismatch, "Total number of timestamps that we could not find the reported ts"); rack_find_high = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "findhigh", CTLFLAG_RD, &rack_find_high, "Total number of FIN causing find-high"); rack_reorder_seen = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "reordering", CTLFLAG_RD, &rack_reorder_seen, "Total number of times we added delay due to reordering"); rack_tlp_tot = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "tlp_to_total", CTLFLAG_RD, &rack_tlp_tot, "Total number of tail loss probe expirations"); rack_tlp_newdata = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "tlp_new", CTLFLAG_RD, &rack_tlp_newdata, "Total number of tail loss probe sending new data"); rack_tlp_retran = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "tlp_retran", CTLFLAG_RD, &rack_tlp_retran, "Total number of tail loss probe sending retransmitted data"); rack_tlp_retran_bytes = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "tlp_retran_bytes", CTLFLAG_RD, &rack_tlp_retran_bytes, "Total bytes of tail loss probe sending retransmitted data"); rack_tlp_retran_fail = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "tlp_retran_fail", CTLFLAG_RD, &rack_tlp_retran_fail, "Total number of tail loss probe sending retransmitted data that failed (wait for t3)"); rack_to_tot = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "rack_to_tot", CTLFLAG_RD, &rack_to_tot, "Total number of times the rack to expired?"); rack_to_arm_rack = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "arm_rack", CTLFLAG_RD, &rack_to_arm_rack, "Total number of times the rack timer armed?"); rack_to_arm_tlp = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "arm_tlp", CTLFLAG_RD, &rack_to_arm_tlp, "Total number of times the tlp timer armed?"); + + rack_calc_zero = counter_u64_alloc(M_WAITOK); + rack_calc_nonzero = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "calc_zero", CTLFLAG_RD, + &rack_calc_zero, + "Total number of times pacing time worked out to zero?"); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "calc_nonzero", CTLFLAG_RD, + &rack_calc_nonzero, + "Total number of times pacing time worked out to non-zero?"); rack_paced_segments = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "paced", CTLFLAG_RD, &rack_paced_segments, "Total number of times a segment send caused hptsi"); rack_unpaced_segments = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "unpaced", CTLFLAG_RD, &rack_unpaced_segments, "Total number of times a segment did not cause hptsi"); rack_saw_enobuf = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "saw_enobufs", CTLFLAG_RD, &rack_saw_enobuf, "Total number of times a segment did not cause hptsi"); rack_saw_enetunreach = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "saw_enetunreach", CTLFLAG_RD, &rack_saw_enetunreach, "Total number of times a segment did not cause hptsi"); rack_to_alloc = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "allocs", CTLFLAG_RD, &rack_to_alloc, "Total allocations of tracking structures"); rack_to_alloc_hard = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "allochard", CTLFLAG_RD, &rack_to_alloc_hard, "Total allocations done with sleeping the hard way"); rack_to_alloc_emerg = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "allocemerg", CTLFLAG_RD, &rack_to_alloc_emerg, "Total allocations done from emergency cache"); rack_to_alloc_limited = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "alloc_limited", CTLFLAG_RD, &rack_to_alloc_limited, "Total allocations dropped due to limit"); rack_alloc_limited_conns = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "alloc_limited_conns", CTLFLAG_RD, &rack_alloc_limited_conns, "Connections with allocations dropped due to limit"); rack_split_limited = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "split_limited", CTLFLAG_RD, &rack_split_limited, "Split allocations dropped due to limit"); rack_sack_proc_all = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "sack_long", CTLFLAG_RD, &rack_sack_proc_all, "Total times we had to walk whole list for sack processing"); rack_sack_proc_restart = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "sack_restart", CTLFLAG_RD, &rack_sack_proc_restart, "Total times we had to walk whole list due to a restart"); rack_sack_proc_short = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "sack_short", CTLFLAG_RD, &rack_sack_proc_short, "Total times we took shortcut for sack processing"); rack_enter_tlp_calc = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "tlp_calc_entered", CTLFLAG_RD, &rack_enter_tlp_calc, "Total times we called calc-tlp"); rack_used_tlpmethod = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "hit_tlp_method", CTLFLAG_RD, &rack_used_tlpmethod, "Total number of runt sacks"); rack_used_tlpmethod2 = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "hit_tlp_method2", CTLFLAG_RD, &rack_used_tlpmethod2, - "Total number of runt sacks 2"); - rack_runt_sacks = counter_u64_alloc(M_WAITOK); - SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + "Total number of times we hit TLP method 2"); + /* Sack Attacker detection stuff */ + rack_attack = SYSCTL_ADD_NODE(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), - OID_AUTO, "runtsacks", CTLFLAG_RD, - &rack_runt_sacks, - "Total number of runt sacks"); + OID_AUTO, + "sack_attack", + CTLFLAG_RW, 0, + "Rack Sack Attack Counters and Controls"); + SYSCTL_ADD_U32(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "detect_highsackratio", CTLFLAG_RW, + &rack_highest_sack_thresh_seen, 0, + "Highest sack to ack ratio seen"); + SYSCTL_ADD_U32(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "detect_highmoveratio", CTLFLAG_RW, + &rack_highest_move_thresh_seen, 0, + "Highest move to non-move ratio seen"); + rack_ack_total = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "acktotal", CTLFLAG_RD, + &rack_ack_total, + "Total number of Ack's"); + + rack_express_sack = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "exp_sacktotal", CTLFLAG_RD, + &rack_express_sack, + "Total expresss number of Sack's"); + rack_sack_total = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "sacktotal", CTLFLAG_RD, + &rack_sack_total, + "Total number of SACK's"); + rack_move_none = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "move_none", CTLFLAG_RD, + &rack_move_none, + "Total number of SACK index reuse of postions under threshold"); + rack_move_some = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "move_some", CTLFLAG_RD, + &rack_move_some, + "Total number of SACK index reuse of postions over threshold"); + rack_sack_attacks_detected = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "attacks", CTLFLAG_RD, + &rack_sack_attacks_detected, + "Total number of SACK attackers that had sack disabled"); + rack_sack_attacks_reversed = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "reversed", CTLFLAG_RD, + &rack_sack_attacks_reversed, + "Total number of SACK attackers that were later determined false positive"); + rack_sack_used_next_merge = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "nextmerge", CTLFLAG_RD, + &rack_sack_used_next_merge, + "Total number of times we used the next merge"); + rack_sack_used_prev_merge = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "prevmerge", CTLFLAG_RD, + &rack_sack_used_prev_merge, + "Total number of times we used the prev merge"); + rack_sack_skipped_acked = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "skipacked", CTLFLAG_RD, + &rack_sack_skipped_acked, + "Total number of times we skipped previously sacked"); + rack_sack_splits = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_attack), + OID_AUTO, "ofsplit", CTLFLAG_RD, + &rack_sack_splits, + "Total number of times we did the old fashion tree split"); rack_progress_drops = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "prog_drops", CTLFLAG_RD, &rack_progress_drops, "Total number of progress drops"); rack_input_idle_reduces = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "idle_reduce_oninput", CTLFLAG_RD, &rack_input_idle_reduces, "Total number of idle reductions on input"); + rack_collapsed_win = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "collapsed_win", CTLFLAG_RD, + &rack_collapsed_win, + "Total number of collapsed windows"); rack_tlp_does_nada = counter_u64_alloc(M_WAITOK); SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, - SYSCTL_CHILDREN(rack_sysctl_root), + SYSCTL_CHILDREN(rack_counters), OID_AUTO, "tlp_nada", CTLFLAG_RD, &rack_tlp_does_nada, "Total number of nada tlp calls"); + + rack_tls_rwnd = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "tls_rwnd", CTLFLAG_RD, + &rack_tls_rwnd, + "Total hdwr tls rwnd limited"); + + rack_tls_cwnd = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "tls_cwnd", CTLFLAG_RD, + &rack_tls_cwnd, + "Total hdwr tls cwnd limited"); + + rack_tls_app = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "tls_app", CTLFLAG_RD, + &rack_tls_app, + "Total hdwr tls app limited"); + + rack_tls_other = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "tls_other", CTLFLAG_RD, + &rack_tls_other, + "Total hdwr tls other limited"); + + rack_tls_filled = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "tls_filled", CTLFLAG_RD, + &rack_tls_filled, + "Total hdwr tls filled"); + + rack_tls_rxt = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "tls_rxt", CTLFLAG_RD, + &rack_tls_rxt, + "Total hdwr rxt"); + + rack_tls_tlp = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "tls_tlp", CTLFLAG_RD, + &rack_tls_tlp, + "Total hdwr tls tlp"); + rack_per_timer_hole = counter_u64_alloc(M_WAITOK); + SYSCTL_ADD_COUNTER_U64(&rack_sysctl_ctx, + SYSCTL_CHILDREN(rack_counters), + OID_AUTO, "timer_hole", CTLFLAG_RD, + &rack_per_timer_hole, + "Total persists start in timer hole"); + COUNTER_ARRAY_ALLOC(rack_out_size, TCP_MSS_ACCT_SIZE, M_WAITOK); SYSCTL_ADD_COUNTER_U64_ARRAY(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "outsize", CTLFLAG_RD, rack_out_size, TCP_MSS_ACCT_SIZE, "MSS send sizes"); COUNTER_ARRAY_ALLOC(rack_opts_arry, RACK_OPTS_SIZE, M_WAITOK); SYSCTL_ADD_COUNTER_U64_ARRAY(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "opts", CTLFLAG_RD, rack_opts_arry, RACK_OPTS_SIZE, "RACK Option Stats"); SYSCTL_ADD_PROC(&rack_sysctl_ctx, SYSCTL_CHILDREN(rack_sysctl_root), OID_AUTO, "clear", CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_MPSAFE, &rack_clear_counter, 0, sysctl_rack_clear, "IU", "Clear counters"); } +static __inline int +rb_map_cmp(struct rack_sendmap *b, struct rack_sendmap *a) +{ + if (SEQ_GEQ(b->r_start, a->r_start) && + SEQ_LT(b->r_start, a->r_end)) { + /* + * The entry b is within the + * block a. i.e.: + * a -- |-------------| + * b -- |----| + * + * b -- |------| + * + * b -- |-----------| + */ + return (0); + } else if (SEQ_GEQ(b->r_start, a->r_end)) { + /* + * b falls as either the next + * sequence block after a so a + * is said to be smaller than b. + * i.e: + * a -- |------| + * b -- |--------| + * or + * b -- |-----| + */ + return (1); + } + /* + * Whats left is where a is + * larger than b. i.e: + * a -- |-------| + * b -- |---| + * or even possibly + * b -- |--------------| + */ + return (-1); +} + +RB_PROTOTYPE(rack_rb_tree_head, rack_sendmap, r_next, rb_map_cmp); +RB_GENERATE(rack_rb_tree_head, rack_sendmap, r_next, rb_map_cmp); + static inline int32_t rack_progress_timeout_check(struct tcpcb *tp) { -#ifdef NETFLIX_PROGRESS if (tp->t_maxunacktime && tp->t_acktime && TSTMP_GT(ticks, tp->t_acktime)) { if ((ticks - tp->t_acktime) >= tp->t_maxunacktime) { /* * There is an assumption that the caller * will drop the connection so we will * increment the counters here. */ struct tcp_rack *rack; rack = (struct tcp_rack *)tp->t_fb_ptr; counter_u64_add(rack_progress_drops, 1); +#ifdef NETFLIX_STATS TCPSTAT_INC(tcps_progdrops); +#endif rack_log_progress_event(rack, tp, ticks, PROGRESS_DROP, __LINE__); return (1); } } -#endif return (0); } + static void +rack_log_retran_reason(struct tcp_rack *rack, struct rack_sendmap *rsm, uint32_t tsused, uint32_t thresh, int mod) +{ + if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + struct timeval tv; + memset(&log.u_bbr, 0, sizeof(log.u_bbr)); + log.u_bbr.flex1 = tsused; + log.u_bbr.flex2 = thresh; + log.u_bbr.flex3 = rsm->r_flags; + log.u_bbr.flex4 = rsm->r_dupack; + log.u_bbr.flex5 = rsm->r_start; + log.u_bbr.flex6 = rsm->r_end; + log.u_bbr.flex8 = mod; + log.u_bbr.inhpts = rack->rc_inp->inp_in_hpts; + log.u_bbr.ininput = rack->rc_inp->inp_in_input; + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(rack->rc_tp, NULL, + &rack->rc_inp->inp_socket->so_rcv, + &rack->rc_inp->inp_socket->so_snd, + BBR_LOG_SETTINGS_CHG, 0, + 0, &log, false, &tv); + } +} + + + +static void rack_log_to_start(struct tcp_rack *rack, uint32_t cts, uint32_t to, int32_t slot, uint8_t which) { if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.flex1 = TICKS_2_MSEC(rack->rc_tp->t_srtt >> TCP_RTT_SHIFT); log.u_bbr.flex2 = to; log.u_bbr.flex3 = rack->r_ctl.rc_hpts_flags; log.u_bbr.flex4 = slot; log.u_bbr.flex5 = rack->rc_inp->inp_hptsslot; log.u_bbr.flex6 = rack->rc_tp->t_rxtcur; + log.u_bbr.flex7 = rack->rc_in_persist; log.u_bbr.flex8 = which; + log.u_bbr.pkts_out = rack->r_ctl.rc_prr_sndcnt; log.u_bbr.inhpts = rack->rc_inp->inp_in_hpts; log.u_bbr.ininput = rack->rc_inp->inp_in_input; - TCP_LOG_EVENT(rack->rc_tp, NULL, + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(rack->rc_tp, NULL, &rack->rc_inp->inp_socket->so_rcv, &rack->rc_inp->inp_socket->so_snd, BBR_LOG_TIMERSTAR, 0, - 0, &log, false); + 0, &log, false, &tv); } } static void -rack_log_to_event(struct tcp_rack *rack, int32_t to_num) +rack_log_to_event(struct tcp_rack *rack, int32_t to_num, int no) { if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.inhpts = rack->rc_inp->inp_in_hpts; log.u_bbr.ininput = rack->rc_inp->inp_in_input; log.u_bbr.flex8 = to_num; log.u_bbr.flex1 = rack->r_ctl.rc_rack_min_rtt; log.u_bbr.flex2 = rack->rc_rack_rtt; - TCP_LOG_EVENT(rack->rc_tp, NULL, + log.u_bbr.flex3 = no; + log.u_bbr.flex5 = rack->r_ctl.rc_prr_sndcnt; + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(rack->rc_tp, NULL, &rack->rc_inp->inp_socket->so_rcv, &rack->rc_inp->inp_socket->so_snd, BBR_LOG_RTO, 0, - 0, &log, false); + 0, &log, false, &tv); } } static void rack_log_rtt_upd(struct tcpcb *tp, struct tcp_rack *rack, int32_t t, uint32_t o_srtt, uint32_t o_var) { if (tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.inhpts = rack->rc_inp->inp_in_hpts; log.u_bbr.ininput = rack->rc_inp->inp_in_input; log.u_bbr.flex1 = t; log.u_bbr.flex2 = o_srtt; log.u_bbr.flex3 = o_var; log.u_bbr.flex4 = rack->r_ctl.rack_rs.rs_rtt_lowest; log.u_bbr.flex5 = rack->r_ctl.rack_rs.rs_rtt_highest; log.u_bbr.flex6 = rack->r_ctl.rack_rs.rs_rtt_cnt; log.u_bbr.rttProp = rack->r_ctl.rack_rs.rs_rtt_tot; log.u_bbr.flex8 = rack->r_ctl.rc_rate_sample_method; - TCP_LOG_EVENT(tp, NULL, + log.u_bbr.pkts_out = rack->r_ctl.rc_prr_sndcnt; + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(tp, NULL, &rack->rc_inp->inp_socket->so_rcv, &rack->rc_inp->inp_socket->so_snd, BBR_LOG_BBRRTT, 0, - 0, &log, false); + 0, &log, false, &tv); } } static void rack_log_rtt_sample(struct tcp_rack *rack, uint32_t rtt) { /* * Log the rtt sample we are * applying to the srtt algorithm in * useconds. */ if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; struct timeval tv; - memset(&log, 0, sizeof(log)); /* Convert our ms to a microsecond */ + memset(&log, 0, sizeof(log)); log.u_bbr.flex1 = rtt * 1000; + log.u_bbr.flex2 = rack->r_ctl.ack_count; + log.u_bbr.flex3 = rack->r_ctl.sack_count; + log.u_bbr.flex4 = rack->r_ctl.sack_noextra_move; + log.u_bbr.flex5 = rack->r_ctl.sack_moved_extra; + log.u_bbr.flex8 = rack->sack_attack_disable; log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); TCP_LOG_EVENTP(rack->rc_tp, NULL, &rack->rc_inp->inp_socket->so_rcv, &rack->rc_inp->inp_socket->so_snd, TCP_LOG_RTT, 0, 0, &log, false, &tv); } } static inline void rack_log_progress_event(struct tcp_rack *rack, struct tcpcb *tp, uint32_t tick, int event, int line) { if (rack_verbose_logging && (tp->t_logstate != TCP_LOG_STATE_OFF)) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.inhpts = rack->rc_inp->inp_in_hpts; log.u_bbr.ininput = rack->rc_inp->inp_in_input; log.u_bbr.flex1 = line; log.u_bbr.flex2 = tick; log.u_bbr.flex3 = tp->t_maxunacktime; log.u_bbr.flex4 = tp->t_acktime; log.u_bbr.flex8 = event; - TCP_LOG_EVENT(tp, NULL, + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(tp, NULL, &rack->rc_inp->inp_socket->so_rcv, &rack->rc_inp->inp_socket->so_snd, BBR_LOG_PROGRESS, 0, - 0, &log, false); + 0, &log, false, &tv); } } static void rack_log_type_bbrsnd(struct tcp_rack *rack, uint32_t len, uint32_t slot, uint32_t cts) { if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.inhpts = rack->rc_inp->inp_in_hpts; log.u_bbr.ininput = rack->rc_inp->inp_in_input; log.u_bbr.flex1 = slot; + log.u_bbr.flex2 = rack->r_ctl.rc_prr_sndcnt; log.u_bbr.flex7 = (0x0000ffff & rack->r_ctl.rc_hpts_flags); log.u_bbr.flex8 = rack->rc_in_persist; - TCP_LOG_EVENT(rack->rc_tp, NULL, + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(rack->rc_tp, NULL, &rack->rc_inp->inp_socket->so_rcv, &rack->rc_inp->inp_socket->so_snd, BBR_LOG_BBRSND, 0, - 0, &log, false); + 0, &log, false, &tv); } } static void rack_log_doseg_done(struct tcp_rack *rack, uint32_t cts, int32_t nxt_pkt, int32_t did_out, int way_out) { if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log, 0, sizeof(log)); log.u_bbr.flex1 = did_out; log.u_bbr.flex2 = nxt_pkt; log.u_bbr.flex3 = way_out; log.u_bbr.flex4 = rack->r_ctl.rc_hpts_flags; + log.u_bbr.flex5 = rack->r_ctl.rc_prr_sndcnt; + log.u_bbr.applimited = rack->r_ctl.rc_pace_min_segs; log.u_bbr.flex7 = rack->r_wanted_output; log.u_bbr.flex8 = rack->rc_in_persist; - TCP_LOG_EVENT(rack->rc_tp, NULL, + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(rack->rc_tp, NULL, &rack->rc_inp->inp_socket->so_rcv, &rack->rc_inp->inp_socket->so_snd, BBR_LOG_DOSEG_DONE, 0, - 0, &log, false); + 0, &log, false, &tv); } } +static void +rack_log_type_hrdwtso(struct tcpcb *tp, struct tcp_rack *rack, int len, int mod, int32_t orig_len, int frm) +{ + if (tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + struct timeval tv; + uint32_t cts; + memset(&log, 0, sizeof(log)); + cts = tcp_get_usecs(&tv); + log.u_bbr.flex1 = rack->r_ctl.rc_pace_min_segs; + log.u_bbr.flex3 = rack->r_ctl.rc_pace_max_segs; + log.u_bbr.flex4 = len; + log.u_bbr.flex5 = orig_len; + log.u_bbr.flex6 = rack->r_ctl.rc_sacked; + log.u_bbr.flex7 = mod; + log.u_bbr.flex8 = frm; + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(tp, NULL, + &tp->t_inpcb->inp_socket->so_rcv, + &tp->t_inpcb->inp_socket->so_snd, + TCP_HDWR_TLS, 0, + 0, &log, false, &tv); + } +} + static void rack_log_type_just_return(struct tcp_rack *rack, uint32_t cts, uint32_t tlen, uint32_t slot, uint8_t hpts_calling) { if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.inhpts = rack->rc_inp->inp_in_hpts; log.u_bbr.ininput = rack->rc_inp->inp_in_input; log.u_bbr.flex1 = slot; log.u_bbr.flex2 = rack->r_ctl.rc_hpts_flags; + log.u_bbr.flex5 = rack->r_ctl.rc_prr_sndcnt; log.u_bbr.flex7 = hpts_calling; log.u_bbr.flex8 = rack->rc_in_persist; - TCP_LOG_EVENT(rack->rc_tp, NULL, + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(rack->rc_tp, NULL, &rack->rc_inp->inp_socket->so_rcv, &rack->rc_inp->inp_socket->so_snd, BBR_LOG_JUSTRET, 0, - tlen, &log, false); + tlen, &log, false, &tv); } } static void rack_log_to_cancel(struct tcp_rack *rack, int32_t hpts_removed, int line) { if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.inhpts = rack->rc_inp->inp_in_hpts; log.u_bbr.ininput = rack->rc_inp->inp_in_input; log.u_bbr.flex1 = line; log.u_bbr.flex2 = 0; log.u_bbr.flex3 = rack->r_ctl.rc_hpts_flags; log.u_bbr.flex4 = 0; + log.u_bbr.flex5 = rack->r_ctl.rc_prr_sndcnt; log.u_bbr.flex6 = rack->rc_tp->t_rxtcur; log.u_bbr.flex8 = hpts_removed; - TCP_LOG_EVENT(rack->rc_tp, NULL, + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(rack->rc_tp, NULL, &rack->rc_inp->inp_socket->so_rcv, &rack->rc_inp->inp_socket->so_snd, BBR_LOG_TIMERCANC, 0, - 0, &log, false); + 0, &log, false, &tv); } } static void rack_log_to_processing(struct tcp_rack *rack, uint32_t cts, int32_t ret, int32_t timers) { if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.flex1 = timers; log.u_bbr.flex2 = ret; log.u_bbr.flex3 = rack->r_ctl.rc_timer_exp; log.u_bbr.flex4 = rack->r_ctl.rc_hpts_flags; log.u_bbr.flex5 = cts; - TCP_LOG_EVENT(rack->rc_tp, NULL, + log.u_bbr.flex6 = rack->r_ctl.rc_prr_sndcnt; + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(rack->rc_tp, NULL, &rack->rc_inp->inp_socket->so_rcv, &rack->rc_inp->inp_socket->so_snd, BBR_LOG_TO_PROCESS, 0, - 0, &log, false); + 0, &log, false, &tv); } } static void +rack_log_to_prr(struct tcp_rack *rack, int frm) +{ + if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + struct timeval tv; + + memset(&log.u_bbr, 0, sizeof(log.u_bbr)); + log.u_bbr.flex1 = rack->r_ctl.rc_prr_out; + log.u_bbr.flex2 = rack->r_ctl.rc_prr_recovery_fs; + log.u_bbr.flex3 = rack->r_ctl.rc_prr_sndcnt; + log.u_bbr.flex4 = rack->r_ctl.rc_prr_delivered; + log.u_bbr.flex5 = rack->r_ctl.rc_sacked; + log.u_bbr.flex6 = rack->r_ctl.rc_holes_rxt; + log.u_bbr.flex8 = frm; + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + TCP_LOG_EVENTP(rack->rc_tp, NULL, + &rack->rc_inp->inp_socket->so_rcv, + &rack->rc_inp->inp_socket->so_snd, + BBR_LOG_BBRUPD, 0, + 0, &log, false, &tv); + } +} + +#ifdef NETFLIX_EXP_DETECTION +static void +rack_log_sad(struct tcp_rack *rack, int event) +{ + if (rack->rc_tp->t_logstate != TCP_LOG_STATE_OFF) { + union tcp_log_stackspecific log; + struct timeval tv; + + memset(&log.u_bbr, 0, sizeof(log.u_bbr)); + log.u_bbr.flex1 = rack->r_ctl.sack_count; + log.u_bbr.flex2 = rack->r_ctl.ack_count; + log.u_bbr.flex3 = rack->r_ctl.sack_moved_extra; + log.u_bbr.flex4 = rack->r_ctl.sack_noextra_move; + log.u_bbr.flex5 = rack->r_ctl.rc_num_maps_alloced; + log.u_bbr.flex6 = tcp_sack_to_ack_thresh; + log.u_bbr.pkts_out = tcp_sack_to_move_thresh; + log.u_bbr.lt_epoch = (tcp_force_detection << 8); + log.u_bbr.lt_epoch |= rack->do_detection; + log.u_bbr.applimited = tcp_map_minimum; + log.u_bbr.flex7 = rack->sack_attack_disable; + log.u_bbr.flex8 = event; + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + log.u_bbr.delivered = tcp_sad_decay_val; + TCP_LOG_EVENTP(rack->rc_tp, NULL, + &rack->rc_inp->inp_socket->so_rcv, + &rack->rc_inp->inp_socket->so_snd, + TCP_SAD_DETECTION, 0, + 0, &log, false, &tv); + } +} +#endif + +static void rack_counter_destroy() { counter_u64_free(rack_badfr); counter_u64_free(rack_badfr_bytes); counter_u64_free(rack_rtm_prr_retran); counter_u64_free(rack_rtm_prr_newdata); counter_u64_free(rack_timestamp_mismatch); counter_u64_free(rack_reorder_seen); counter_u64_free(rack_tlp_tot); counter_u64_free(rack_tlp_newdata); counter_u64_free(rack_tlp_retran); counter_u64_free(rack_tlp_retran_bytes); counter_u64_free(rack_tlp_retran_fail); counter_u64_free(rack_to_tot); counter_u64_free(rack_to_arm_rack); counter_u64_free(rack_to_arm_tlp); counter_u64_free(rack_paced_segments); counter_u64_free(rack_unpaced_segments); counter_u64_free(rack_saw_enobuf); counter_u64_free(rack_saw_enetunreach); counter_u64_free(rack_to_alloc_hard); counter_u64_free(rack_to_alloc_emerg); counter_u64_free(rack_sack_proc_all); counter_u64_free(rack_sack_proc_short); counter_u64_free(rack_sack_proc_restart); counter_u64_free(rack_to_alloc); counter_u64_free(rack_to_alloc_limited); + counter_u64_free(rack_alloc_limited_conns); counter_u64_free(rack_split_limited); counter_u64_free(rack_find_high); - counter_u64_free(rack_runt_sacks); counter_u64_free(rack_enter_tlp_calc); counter_u64_free(rack_used_tlpmethod); counter_u64_free(rack_used_tlpmethod2); counter_u64_free(rack_progress_drops); counter_u64_free(rack_input_idle_reduces); + counter_u64_free(rack_collapsed_win); counter_u64_free(rack_tlp_does_nada); COUNTER_ARRAY_FREE(rack_out_size, TCP_MSS_ACCT_SIZE); COUNTER_ARRAY_FREE(rack_opts_arry, RACK_OPTS_SIZE); } static struct rack_sendmap * rack_alloc(struct tcp_rack *rack) { struct rack_sendmap *rsm; rsm = uma_zalloc(rack_zone, M_NOWAIT); if (rsm) { rack->r_ctl.rc_num_maps_alloced++; counter_u64_add(rack_to_alloc, 1); return (rsm); } if (rack->rc_free_cnt) { counter_u64_add(rack_to_alloc_emerg, 1); rsm = TAILQ_FIRST(&rack->r_ctl.rc_free); - TAILQ_REMOVE(&rack->r_ctl.rc_free, rsm, r_next); + TAILQ_REMOVE(&rack->r_ctl.rc_free, rsm, r_tnext); rack->rc_free_cnt--; return (rsm); } return (NULL); } static struct rack_sendmap * rack_alloc_full_limit(struct tcp_rack *rack) { - if ((rack_map_entries_limit > 0) && - (rack->r_ctl.rc_num_maps_alloced >= rack_map_entries_limit)) { + if ((rack_tcp_map_entries_limit > 0) && + (rack->do_detection == 0) && + (rack->r_ctl.rc_num_maps_alloced >= rack_tcp_map_entries_limit)) { counter_u64_add(rack_to_alloc_limited, 1); if (!rack->alloc_limit_reported) { rack->alloc_limit_reported = 1; counter_u64_add(rack_alloc_limited_conns, 1); } return (NULL); } return (rack_alloc(rack)); } /* wrapper to allocate a sendmap entry, subject to a specific limit */ static struct rack_sendmap * rack_alloc_limit(struct tcp_rack *rack, uint8_t limit_type) { struct rack_sendmap *rsm; if (limit_type) { /* currently there is only one limit type */ - if (rack_map_split_limit > 0 && - rack->r_ctl.rc_num_split_allocs >= rack_map_split_limit) { + if (rack_tcp_map_split_limit > 0 && + (rack->do_detection == 0) && + rack->r_ctl.rc_num_split_allocs >= rack_tcp_map_split_limit) { counter_u64_add(rack_split_limited, 1); if (!rack->alloc_limit_reported) { rack->alloc_limit_reported = 1; counter_u64_add(rack_alloc_limited_conns, 1); } return (NULL); } } /* allocate and mark in the limit type, if set */ rsm = rack_alloc(rack); if (rsm != NULL && limit_type) { rsm->r_limit_type = limit_type; rack->r_ctl.rc_num_split_allocs++; } return (rsm); } static void rack_free(struct tcp_rack *rack, struct rack_sendmap *rsm) { if (rsm->r_limit_type) { /* currently there is only one limit type */ rack->r_ctl.rc_num_split_allocs--; } if (rack->r_ctl.rc_tlpsend == rsm) rack->r_ctl.rc_tlpsend = NULL; - if (rack->r_ctl.rc_next == rsm) - rack->r_ctl.rc_next = NULL; if (rack->r_ctl.rc_sacklast == rsm) rack->r_ctl.rc_sacklast = NULL; if (rack->rc_free_cnt < rack_free_cache) { memset(rsm, 0, sizeof(struct rack_sendmap)); - TAILQ_INSERT_TAIL(&rack->r_ctl.rc_free, rsm, r_next); + TAILQ_INSERT_TAIL(&rack->r_ctl.rc_free, rsm, r_tnext); rsm->r_limit_type = 0; rack->rc_free_cnt++; return; } rack->r_ctl.rc_num_maps_alloced--; uma_zfree(rack_zone, rsm); } /* * CC wrapper hook functions */ static void rack_ack_received(struct tcpcb *tp, struct tcp_rack *rack, struct tcphdr *th, uint16_t nsegs, uint16_t type, int32_t recovery) { #ifdef NETFLIX_STATS int32_t gput; #endif INP_WLOCK_ASSERT(tp->t_inpcb); - tp->ccv->nsegs = nsegs; tp->ccv->bytes_this_ack = BYTES_THIS_ACK(tp, th); if ((recovery) && (rack->r_ctl.rc_early_recovery_segs)) { uint32_t max; - max = rack->r_ctl.rc_early_recovery_segs * tp->t_maxseg; + max = rack->r_ctl.rc_early_recovery_segs * ctf_fixed_maxseg(tp); if (tp->ccv->bytes_this_ack > max) { tp->ccv->bytes_this_ack = max; } } if (tp->snd_cwnd <= tp->snd_wnd) tp->ccv->flags |= CCF_CWND_LIMITED; else tp->ccv->flags &= ~CCF_CWND_LIMITED; if (type == CC_ACK) { #ifdef NETFLIX_STATS stats_voi_update_abs_s32(tp->t_stats, VOI_TCP_CALCFRWINDIFF, ((int32_t) tp->snd_cwnd) - tp->snd_wnd); if ((tp->t_flags & TF_GPUTINPROG) && SEQ_GEQ(th->th_ack, tp->gput_ack)) { gput = (((int64_t) (th->th_ack - tp->gput_seq)) << 3) / max(1, tcp_ts_getticks() - tp->gput_ts); + /* We store it in bytes per ms (or kbytes per sec) */ + rack->r_ctl.rc_gp_history[rack->r_ctl.rc_gp_hist_idx] = gput / 8; + rack->r_ctl.rc_gp_hist_idx++; + if (rack->r_ctl.rc_gp_hist_idx >= RACK_GP_HIST) + rack->r_ctl.rc_gp_hist_filled = 1; + rack->r_ctl.rc_gp_hist_idx %= RACK_GP_HIST; stats_voi_update_abs_u32(tp->t_stats, VOI_TCP_GPUT, gput); /* * XXXLAS: This is a temporary hack, and should be * chained off VOI_TCP_GPUT when stats(9) grows an * API to deal with chained VOIs. */ if (tp->t_stats_gput_prev > 0) stats_voi_update_abs_s32(tp->t_stats, VOI_TCP_GPUT_ND, ((gput - tp->t_stats_gput_prev) * 100) / tp->t_stats_gput_prev); tp->t_flags &= ~TF_GPUTINPROG; tp->t_stats_gput_prev = gput; + if (tp->t_maxpeakrate) { /* * We update t_peakrate_thr. This gives us roughly * one update per round trip time. */ tcp_update_peakrate_thr(tp); } } #endif if (tp->snd_cwnd > tp->snd_ssthresh) { tp->t_bytes_acked += min(tp->ccv->bytes_this_ack, - nsegs * V_tcp_abc_l_var * tp->t_maxseg); + nsegs * V_tcp_abc_l_var * ctf_fixed_maxseg(tp)); if (tp->t_bytes_acked >= tp->snd_cwnd) { tp->t_bytes_acked -= tp->snd_cwnd; tp->ccv->flags |= CCF_ABC_SENTAWND; } } else { tp->ccv->flags &= ~CCF_ABC_SENTAWND; tp->t_bytes_acked = 0; } } if (CC_ALGO(tp)->ack_received != NULL) { /* XXXLAS: Find a way to live without this */ tp->ccv->curack = th->th_ack; CC_ALGO(tp)->ack_received(tp->ccv, type); } #ifdef NETFLIX_STATS stats_voi_update_abs_ulong(tp->t_stats, VOI_TCP_LCWIN, tp->snd_cwnd); #endif if (rack->r_ctl.rc_rack_largest_cwnd < tp->snd_cwnd) { rack->r_ctl.rc_rack_largest_cwnd = tp->snd_cwnd; } /* we enforce max peak rate if it is set. */ if (tp->t_peakrate_thr && tp->snd_cwnd > tp->t_peakrate_thr) { tp->snd_cwnd = tp->t_peakrate_thr; } } static void tcp_rack_partialack(struct tcpcb *tp, struct tcphdr *th) { struct tcp_rack *rack; rack = (struct tcp_rack *)tp->t_fb_ptr; INP_WLOCK_ASSERT(tp->t_inpcb); if (rack->r_ctl.rc_prr_sndcnt > 0) rack->r_wanted_output++; } static void rack_post_recovery(struct tcpcb *tp, struct tcphdr *th) { struct tcp_rack *rack; INP_WLOCK_ASSERT(tp->t_inpcb); rack = (struct tcp_rack *)tp->t_fb_ptr; if (CC_ALGO(tp)->post_recovery != NULL) { tp->ccv->curack = th->th_ack; CC_ALGO(tp)->post_recovery(tp->ccv); } /* * Here we can in theory adjust cwnd to be based on the number of * losses in the window (rack->r_ctl.rc_loss_count). This is done * based on the rack_use_proportional flag. */ if (rack->r_ctl.rc_prop_reduce && rack->r_ctl.rc_prop_rate) { int32_t reduce; reduce = (rack->r_ctl.rc_loss_count * rack->r_ctl.rc_prop_rate); if (reduce > 50) { reduce = 50; } tp->snd_cwnd -= ((reduce * tp->snd_cwnd) / 100); } else { if (tp->snd_cwnd > tp->snd_ssthresh) { /* Drop us down to the ssthresh (1/2 cwnd at loss) */ tp->snd_cwnd = tp->snd_ssthresh; } } if (rack->r_ctl.rc_prr_sndcnt > 0) { /* Suck the next prr cnt back into cwnd */ tp->snd_cwnd += rack->r_ctl.rc_prr_sndcnt; rack->r_ctl.rc_prr_sndcnt = 0; + rack_log_to_prr(rack, 1); } tp->snd_recover = tp->snd_una; EXIT_RECOVERY(tp->t_flags); + + } static void rack_cong_signal(struct tcpcb *tp, struct tcphdr *th, uint32_t type) { struct tcp_rack *rack; INP_WLOCK_ASSERT(tp->t_inpcb); rack = (struct tcp_rack *)tp->t_fb_ptr; switch (type) { case CC_NDUPACK: -/* rack->r_ctl.rc_ssthresh_set = 1;*/ + tp->t_flags &= ~TF_WASFRECOVERY; + tp->t_flags &= ~TF_WASCRECOVERY; if (!IN_FASTRECOVERY(tp->t_flags)) { rack->r_ctl.rc_tlp_rtx_out = 0; rack->r_ctl.rc_prr_delivered = 0; rack->r_ctl.rc_prr_out = 0; rack->r_ctl.rc_loss_count = 0; - rack->r_ctl.rc_prr_sndcnt = tp->t_maxseg; + rack->r_ctl.rc_prr_sndcnt = ctf_fixed_maxseg(tp); + rack_log_to_prr(rack, 2); rack->r_ctl.rc_prr_recovery_fs = tp->snd_max - tp->snd_una; tp->snd_recover = tp->snd_max; if (tp->t_flags & TF_ECN_PERMIT) tp->t_flags |= TF_ECN_SND_CWR; } break; case CC_ECN: if (!IN_CONGRECOVERY(tp->t_flags)) { TCPSTAT_INC(tcps_ecn_rcwnd); tp->snd_recover = tp->snd_max; if (tp->t_flags & TF_ECN_PERMIT) tp->t_flags |= TF_ECN_SND_CWR; } break; case CC_RTO: tp->t_dupacks = 0; tp->t_bytes_acked = 0; EXIT_RECOVERY(tp->t_flags); tp->snd_ssthresh = max(2, min(tp->snd_wnd, tp->snd_cwnd) / 2 / - tp->t_maxseg) * tp->t_maxseg; - tp->snd_cwnd = tp->t_maxseg; + ctf_fixed_maxseg(tp)) * ctf_fixed_maxseg(tp); + tp->snd_cwnd = ctf_fixed_maxseg(tp); break; case CC_RTO_ERR: TCPSTAT_INC(tcps_sndrexmitbad); /* RTO was unnecessary, so reset everything. */ tp->snd_cwnd = tp->snd_cwnd_prev; tp->snd_ssthresh = tp->snd_ssthresh_prev; tp->snd_recover = tp->snd_recover_prev; - if (tp->t_flags & TF_WASFRECOVERY) + if (tp->t_flags & TF_WASFRECOVERY) { ENTER_FASTRECOVERY(tp->t_flags); - if (tp->t_flags & TF_WASCRECOVERY) + tp->t_flags &= ~TF_WASFRECOVERY; + } + if (tp->t_flags & TF_WASCRECOVERY) { ENTER_CONGRECOVERY(tp->t_flags); + tp->t_flags &= ~TF_WASCRECOVERY; + } tp->snd_nxt = tp->snd_max; tp->t_badrxtwin = 0; break; } if (CC_ALGO(tp)->cong_signal != NULL) { if (th != NULL) tp->ccv->curack = th->th_ack; CC_ALGO(tp)->cong_signal(tp->ccv, type); } } static inline void -rack_cc_after_idle(struct tcpcb *tp, int reduce_largest) +rack_cc_after_idle(struct tcpcb *tp) { uint32_t i_cwnd; INP_WLOCK_ASSERT(tp->t_inpcb); #ifdef NETFLIX_STATS TCPSTAT_INC(tcps_idle_restarts); if (tp->t_state == TCPS_ESTABLISHED) TCPSTAT_INC(tcps_idle_estrestarts); #endif if (CC_ALGO(tp)->after_idle != NULL) CC_ALGO(tp)->after_idle(tp->ccv); - if (V_tcp_initcwnd_segments) - i_cwnd = min((V_tcp_initcwnd_segments * tp->t_maxseg), - max(2 * tp->t_maxseg, 14600)); - else if (V_tcp_do_rfc3390) - i_cwnd = min(4 * tp->t_maxseg, - max(2 * tp->t_maxseg, 4380)); - else { - /* Per RFC5681 Section 3.1 */ - if (tp->t_maxseg > 2190) - i_cwnd = 2 * tp->t_maxseg; - else if (tp->t_maxseg > 1095) - i_cwnd = 3 * tp->t_maxseg; - else - i_cwnd = 4 * tp->t_maxseg; - } - if (reduce_largest) { - /* - * Do we reduce the largest cwnd to make - * rack play nice on restart hptsi wise? - */ - if (((struct tcp_rack *)tp->t_fb_ptr)->r_ctl.rc_rack_largest_cwnd > i_cwnd) - ((struct tcp_rack *)tp->t_fb_ptr)->r_ctl.rc_rack_largest_cwnd = i_cwnd; - } + if (tp->snd_cwnd == 1) + i_cwnd = tp->t_maxseg; /* SYN(-ACK) lost */ + else + i_cwnd = tcp_compute_initwnd(tcp_maxseg(tp)); + /* * Being idle is no differnt than the initial window. If the cc * clamps it down below the initial window raise it to the initial * window. */ if (tp->snd_cwnd < i_cwnd) { tp->snd_cwnd = i_cwnd; } } /* * Indicate whether this ack should be delayed. We can delay the ack if * following conditions are met: * - There is no delayed ack timer in progress. * - Our last ack wasn't a 0-sized window. We never want to delay * the ack that opens up a 0-sized window. * - LRO wasn't used for this segment. We make sure by checking that the * segment size is not larger than the MSS. * - Delayed acks are enabled or this is a half-synchronized T/TCP * connection. */ #define DELAY_ACK(tp, tlen) \ (((tp->t_flags & TF_RXWIN0SENT) == 0) && \ ((tp->t_flags & TF_DELACK) == 0) && \ (tlen <= tp->t_maxseg) && \ (tp->t_delayed_ack || (tp->t_flags & TF_NEEDSYN))) -static inline void -rack_calc_rwin(struct socket *so, struct tcpcb *tp) -{ - int32_t win; - - /* - * Calculate amount of space in receive window, and then do TCP - * input processing. Receive window is amount of space in rcv queue, - * but not less than advertised window. - */ - win = sbspace(&so->so_rcv); - if (win < 0) - win = 0; - tp->rcv_wnd = imax(win, (int)(tp->rcv_adv - tp->rcv_nxt)); -} - -static void -rack_do_drop(struct mbuf *m, struct tcpcb *tp) -{ - /* - * Drop space held by incoming segment and return. - */ - if (tp != NULL) - INP_WUNLOCK(tp->t_inpcb); - if (m) - m_freem(m); -} - -static void -rack_do_dropwithreset(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, int32_t rstreason, int32_t tlen) -{ - if (tp != NULL) { - tcp_dropwithreset(m, th, tp, tlen, rstreason); - INP_WUNLOCK(tp->t_inpcb); - } else - tcp_dropwithreset(m, th, NULL, tlen, rstreason); -} - -/* - * The value in ret_val informs the caller - * if we dropped the tcb (and lock) or not. - * 1 = we dropped it, 0 = the TCB is still locked - * and valid. - */ -static void -rack_do_dropafterack(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, int32_t thflags, int32_t tlen, int32_t * ret_val) -{ - /* - * Generate an ACK dropping incoming segment if it occupies sequence - * space, where the ACK reflects our state. - * - * We can now skip the test for the RST flag since all paths to this - * code happen after packets containing RST have been dropped. - * - * In the SYN-RECEIVED state, don't send an ACK unless the segment - * we received passes the SYN-RECEIVED ACK test. If it fails send a - * RST. This breaks the loop in the "LAND" DoS attack, and also - * prevents an ACK storm between two listening ports that have been - * sent forged SYN segments, each with the source address of the - * other. - */ - struct tcp_rack *rack; - - if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) && - (SEQ_GT(tp->snd_una, th->th_ack) || - SEQ_GT(th->th_ack, tp->snd_max))) { - *ret_val = 1; - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); - return; - } else - *ret_val = 0; - rack = (struct tcp_rack *)tp->t_fb_ptr; - rack->r_wanted_output++; - tp->t_flags |= TF_ACKNOW; - if (m) - m_freem(m); -} - - -static int -rack_process_rst(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp) -{ - /* - * RFC5961 Section 3.2 - * - * - RST drops connection only if SEG.SEQ == RCV.NXT. - If RST is in - * window, we send challenge ACK. - * - * Note: to take into account delayed ACKs, we should test against - * last_ack_sent instead of rcv_nxt. Note 2: we handle special case - * of closed window, not covered by the RFC. - */ - int dropped = 0; - - if ((SEQ_GEQ(th->th_seq, (tp->last_ack_sent - 1)) && - SEQ_LT(th->th_seq, tp->last_ack_sent + tp->rcv_wnd)) || - (tp->rcv_wnd == 0 && tp->last_ack_sent == th->th_seq)) { - - INP_INFO_RLOCK_ASSERT(&V_tcbinfo); - KASSERT(tp->t_state != TCPS_SYN_SENT, - ("%s: TH_RST for TCPS_SYN_SENT th %p tp %p", - __func__, th, tp)); - - if (V_tcp_insecure_rst || - (tp->last_ack_sent == th->th_seq) || - (tp->rcv_nxt == th->th_seq) || - ((tp->last_ack_sent - 1) == th->th_seq)) { - TCPSTAT_INC(tcps_drops); - /* Drop the connection. */ - switch (tp->t_state) { - case TCPS_SYN_RECEIVED: - so->so_error = ECONNREFUSED; - goto close; - case TCPS_ESTABLISHED: - case TCPS_FIN_WAIT_1: - case TCPS_FIN_WAIT_2: - case TCPS_CLOSE_WAIT: - case TCPS_CLOSING: - case TCPS_LAST_ACK: - so->so_error = ECONNRESET; - close: - tcp_state_change(tp, TCPS_CLOSED); - /* FALLTHROUGH */ - default: - tp = tcp_close(tp); - } - dropped = 1; - rack_do_drop(m, tp); - } else { - TCPSTAT_INC(tcps_badrst); - /* Send challenge ACK. */ - tcp_respond(tp, mtod(m, void *), th, m, - tp->rcv_nxt, tp->snd_nxt, TH_ACK); - tp->last_ack_sent = tp->rcv_nxt; - } - } else { - m_freem(m); - } - return (dropped); -} - -/* - * The value in ret_val informs the caller - * if we dropped the tcb (and lock) or not. - * 1 = we dropped it, 0 = the TCB is still locked - * and valid. - */ -static void -rack_challenge_ack(struct mbuf *m, struct tcphdr *th, struct tcpcb *tp, int32_t * ret_val) -{ - INP_INFO_RLOCK_ASSERT(&V_tcbinfo); - - TCPSTAT_INC(tcps_badsyn); - if (V_tcp_insecure_syn && - SEQ_GEQ(th->th_seq, tp->last_ack_sent) && - SEQ_LT(th->th_seq, tp->last_ack_sent + tp->rcv_wnd)) { - tp = tcp_drop(tp, ECONNRESET); - *ret_val = 1; - rack_do_drop(m, tp); - } else { - /* Send challenge ACK. */ - tcp_respond(tp, mtod(m, void *), th, m, tp->rcv_nxt, - tp->snd_nxt, TH_ACK); - tp->last_ack_sent = tp->rcv_nxt; - m = NULL; - *ret_val = 0; - rack_do_drop(m, NULL); - } -} - -/* - * rack_ts_check returns 1 for you should not proceed. It places - * in ret_val what should be returned 1/0 by the caller. The 1 indicates - * that the TCB is unlocked and probably dropped. The 0 indicates the - * TCB is still valid and locked. - */ -static int -rack_ts_check(struct mbuf *m, struct tcphdr *th, struct tcpcb *tp, int32_t tlen, int32_t thflags, int32_t * ret_val) -{ - - /* Check to see if ts_recent is over 24 days old. */ - if (tcp_ts_getticks() - tp->ts_recent_age > TCP_PAWS_IDLE) { - /* - * Invalidate ts_recent. If this segment updates ts_recent, - * the age will be reset later and ts_recent will get a - * valid value. If it does not, setting ts_recent to zero - * will at least satisfy the requirement that zero be placed - * in the timestamp echo reply when ts_recent isn't valid. - * The age isn't reset until we get a valid ts_recent - * because we don't want out-of-order segments to be dropped - * when ts_recent is old. - */ - tp->ts_recent = 0; - } else { - TCPSTAT_INC(tcps_rcvduppack); - TCPSTAT_ADD(tcps_rcvdupbyte, tlen); - TCPSTAT_INC(tcps_pawsdrop); - *ret_val = 0; - if (tlen) { - rack_do_dropafterack(m, tp, th, thflags, tlen, ret_val); - } else { - rack_do_drop(m, NULL); - } - return (1); - } - return (0); -} - -/* - * rack_drop_checks returns 1 for you should not proceed. It places - * in ret_val what should be returned 1/0 by the caller. The 1 indicates - * that the TCB is unlocked and probably dropped. The 0 indicates the - * TCB is still valid and locked. - */ -static int -rack_drop_checks(struct tcpopt *to, struct mbuf *m, struct tcphdr *th, struct tcpcb *tp, int32_t * tlenp, int32_t * thf, int32_t * drop_hdrlen, int32_t * ret_val) -{ - int32_t todrop; - int32_t thflags; - int32_t tlen; - - thflags = *thf; - tlen = *tlenp; - todrop = tp->rcv_nxt - th->th_seq; - if (todrop > 0) { - if (thflags & TH_SYN) { - thflags &= ~TH_SYN; - th->th_seq++; - if (th->th_urp > 1) - th->th_urp--; - else - thflags &= ~TH_URG; - todrop--; - } - /* - * Following if statement from Stevens, vol. 2, p. 960. - */ - if (todrop > tlen - || (todrop == tlen && (thflags & TH_FIN) == 0)) { - /* - * Any valid FIN must be to the left of the window. - * At this point the FIN must be a duplicate or out - * of sequence; drop it. - */ - thflags &= ~TH_FIN; - /* - * Send an ACK to resynchronize and drop any data. - * But keep on processing for RST or ACK. - */ - tp->t_flags |= TF_ACKNOW; - todrop = tlen; - TCPSTAT_INC(tcps_rcvduppack); - TCPSTAT_ADD(tcps_rcvdupbyte, todrop); - } else { - TCPSTAT_INC(tcps_rcvpartduppack); - TCPSTAT_ADD(tcps_rcvpartdupbyte, todrop); - } - if (tp->t_flags & TF_SACK_PERMIT) { - /* - * record the left, to-be-dropped edge of data - * here, for use as dsack block further down - */ - tcp_update_sack_list(tp, th->th_seq, - th->th_seq + todrop); - /* - * ACK now, as the next in-sequence segment - * will clear the DSACK block again - */ - tp->t_flags |= TF_ACKNOW; - } - *drop_hdrlen += todrop; /* drop from the top afterwards */ - th->th_seq += todrop; - tlen -= todrop; - if (th->th_urp > todrop) - th->th_urp -= todrop; - else { - thflags &= ~TH_URG; - th->th_urp = 0; - } - } - /* - * If segment ends after window, drop trailing data (and PUSH and - * FIN); if nothing left, just ACK. - */ - todrop = (th->th_seq + tlen) - (tp->rcv_nxt + tp->rcv_wnd); - if (todrop > 0) { - TCPSTAT_INC(tcps_rcvpackafterwin); - if (todrop >= tlen) { - TCPSTAT_ADD(tcps_rcvbyteafterwin, tlen); - /* - * If window is closed can only take segments at - * window edge, and have to drop data and PUSH from - * incoming segments. Continue processing, but - * remember to ack. Otherwise, drop segment and - * ack. - */ - if (tp->rcv_wnd == 0 && th->th_seq == tp->rcv_nxt) { - tp->t_flags |= TF_ACKNOW; - TCPSTAT_INC(tcps_rcvwinprobe); - } else { - rack_do_dropafterack(m, tp, th, thflags, tlen, ret_val); - return (1); - } - } else - TCPSTAT_ADD(tcps_rcvbyteafterwin, todrop); - m_adj(m, -todrop); - tlen -= todrop; - thflags &= ~(TH_PUSH | TH_FIN); - } - *thf = thflags; - *tlenp = tlen; - return (0); -} - static struct rack_sendmap * rack_find_lowest_rsm(struct tcp_rack *rack) { struct rack_sendmap *rsm; /* * Walk the time-order transmitted list looking for an rsm that is * not acked. This will be the one that was sent the longest time * ago that is still outstanding. */ TAILQ_FOREACH(rsm, &rack->r_ctl.rc_tmap, r_tnext) { if (rsm->r_flags & RACK_ACKED) { continue; } goto finish; } finish: return (rsm); } static struct rack_sendmap * rack_find_high_nonack(struct tcp_rack *rack, struct rack_sendmap *rsm) { struct rack_sendmap *prsm; /* * Walk the sequence order list backward until we hit and arrive at * the highest seq not acked. In theory when this is called it * should be the last segment (which it was not). */ counter_u64_add(rack_find_high, 1); prsm = rsm; - TAILQ_FOREACH_REVERSE_FROM(prsm, &rack->r_ctl.rc_map, rack_head, r_next) { + RB_FOREACH_REVERSE_FROM(prsm, rack_rb_tree_head, rsm) { if (prsm->r_flags & (RACK_ACKED | RACK_HAS_FIN)) { continue; } return (prsm); } return (NULL); } static uint32_t rack_calc_thresh_rack(struct tcp_rack *rack, uint32_t srtt, uint32_t cts) { int32_t lro; uint32_t thresh; /* * lro is the flag we use to determine if we have seen reordering. * If it gets set we have seen reordering. The reorder logic either * works in one of two ways: * * If reorder-fade is configured, then we track the last time we saw * re-ordering occur. If we reach the point where enough time as * passed we no longer consider reordering has occuring. * * Or if reorder-face is 0, then once we see reordering we consider * the connection to alway be subject to reordering and just set lro * to 1. * * In the end if lro is non-zero we add the extra time for * reordering in. */ if (srtt == 0) srtt = 1; if (rack->r_ctl.rc_reorder_ts) { if (rack->r_ctl.rc_reorder_fade) { if (SEQ_GEQ(cts, rack->r_ctl.rc_reorder_ts)) { lro = cts - rack->r_ctl.rc_reorder_ts; if (lro == 0) { /* * No time as passed since the last * reorder, mark it as reordering. */ lro = 1; } } else { /* Negative time? */ lro = 0; } if (lro > rack->r_ctl.rc_reorder_fade) { /* Turn off reordering seen too */ rack->r_ctl.rc_reorder_ts = 0; lro = 0; } } else { /* Reodering does not fade */ lro = 1; } } else { lro = 0; } thresh = srtt + rack->r_ctl.rc_pkt_delay; if (lro) { /* It must be set, if not you get 1/4 rtt */ if (rack->r_ctl.rc_reorder_shift) thresh += (srtt >> rack->r_ctl.rc_reorder_shift); else thresh += (srtt >> 2); } else { thresh += 1; } /* We don't let the rack timeout be above a RTO */ - if (thresh > TICKS_2_MSEC(rack->rc_tp->t_rxtcur)) { thresh = TICKS_2_MSEC(rack->rc_tp->t_rxtcur); } /* And we don't want it above the RTO max either */ if (thresh > rack_rto_max) { thresh = rack_rto_max; } return (thresh); } static uint32_t rack_calc_thresh_tlp(struct tcpcb *tp, struct tcp_rack *rack, struct rack_sendmap *rsm, uint32_t srtt) { struct rack_sendmap *prsm; uint32_t thresh, len; int maxseg; if (srtt == 0) srtt = 1; if (rack->r_ctl.rc_tlp_threshold) thresh = srtt + (srtt / rack->r_ctl.rc_tlp_threshold); else thresh = (srtt * 2); /* Get the previous sent packet, if any */ - maxseg = tcp_maxseg(tp); + maxseg = ctf_fixed_maxseg(tp); counter_u64_add(rack_enter_tlp_calc, 1); len = rsm->r_end - rsm->r_start; if (rack->rack_tlp_threshold_use == TLP_USE_ID) { /* Exactly like the ID */ if (((tp->snd_max - tp->snd_una) - rack->r_ctl.rc_sacked + rack->r_ctl.rc_holes_rxt) <= maxseg) { uint32_t alt_thresh; /* * Compensate for delayed-ack with the d-ack time. */ counter_u64_add(rack_used_tlpmethod, 1); alt_thresh = srtt + (srtt / 2) + rack_delayed_ack_time; if (alt_thresh > thresh) thresh = alt_thresh; } } else if (rack->rack_tlp_threshold_use == TLP_USE_TWO_ONE) { /* 2.1 behavior */ prsm = TAILQ_PREV(rsm, rack_head, r_tnext); if (prsm && (len <= maxseg)) { /* * Two packets outstanding, thresh should be (2*srtt) + * possible inter-packet delay (if any). */ uint32_t inter_gap = 0; int idx, nidx; counter_u64_add(rack_used_tlpmethod, 1); idx = rsm->r_rtr_cnt - 1; nidx = prsm->r_rtr_cnt - 1; if (TSTMP_GEQ(rsm->r_tim_lastsent[nidx], prsm->r_tim_lastsent[idx])) { /* Yes it was sent later (or at the same time) */ inter_gap = rsm->r_tim_lastsent[idx] - prsm->r_tim_lastsent[nidx]; } thresh += inter_gap; } else if (len <= maxseg) { /* * Possibly compensate for delayed-ack. */ uint32_t alt_thresh; counter_u64_add(rack_used_tlpmethod2, 1); alt_thresh = srtt + (srtt / 2) + rack_delayed_ack_time; if (alt_thresh > thresh) thresh = alt_thresh; } } else if (rack->rack_tlp_threshold_use == TLP_USE_TWO_TWO) { /* 2.2 behavior */ if (len <= maxseg) { uint32_t alt_thresh; /* * Compensate for delayed-ack with the d-ack time. */ counter_u64_add(rack_used_tlpmethod, 1); alt_thresh = srtt + (srtt / 2) + rack_delayed_ack_time; if (alt_thresh > thresh) thresh = alt_thresh; } } /* Not above an RTO */ if (thresh > TICKS_2_MSEC(tp->t_rxtcur)) { thresh = TICKS_2_MSEC(tp->t_rxtcur); } /* Not above a RTO max */ if (thresh > rack_rto_max) { thresh = rack_rto_max; } /* Apply user supplied min TLP */ if (thresh < rack_tlp_min) { thresh = rack_tlp_min; } return (thresh); } +static uint32_t +rack_grab_rtt(struct tcpcb *tp, struct tcp_rack *rack) +{ + /* + * We want the rack_rtt which is the + * last rtt we measured. However if that + * does not exist we fallback to the srtt (which + * we probably will never do) and then as a last + * resort we use RACK_INITIAL_RTO if no srtt is + * yet set. + */ + if (rack->rc_rack_rtt) + return(rack->rc_rack_rtt); + else if (tp->t_srtt == 0) + return(RACK_INITIAL_RTO); + return (TICKS_2_MSEC(tp->t_srtt >> TCP_RTT_SHIFT)); +} + static struct rack_sendmap * rack_check_recovery_mode(struct tcpcb *tp, uint32_t tsused) { /* * Check to see that we don't need to fall into recovery. We will * need to do so if our oldest transmit is past the time we should * have had an ack. */ struct tcp_rack *rack; struct rack_sendmap *rsm; int32_t idx; - uint32_t srtt_cur, srtt, thresh; + uint32_t srtt, thresh; rack = (struct tcp_rack *)tp->t_fb_ptr; - if (TAILQ_EMPTY(&rack->r_ctl.rc_map)) { + if (RB_EMPTY(&rack->r_ctl.rc_mtree)) { return (NULL); } - srtt_cur = tp->t_srtt >> TCP_RTT_SHIFT; - srtt = TICKS_2_MSEC(srtt_cur); - if (rack->rc_rack_rtt && (srtt > rack->rc_rack_rtt)) - srtt = rack->rc_rack_rtt; - rsm = TAILQ_FIRST(&rack->r_ctl.rc_tmap); if (rsm == NULL) return (NULL); if (rsm->r_flags & RACK_ACKED) { rsm = rack_find_lowest_rsm(rack); if (rsm == NULL) return (NULL); } idx = rsm->r_rtr_cnt - 1; + srtt = rack_grab_rtt(tp, rack); thresh = rack_calc_thresh_rack(rack, srtt, tsused); if (tsused < rsm->r_tim_lastsent[idx]) { return (NULL); } if ((tsused - rsm->r_tim_lastsent[idx]) < thresh) { return (NULL); } /* Ok if we reach here we are over-due */ rack->r_ctl.rc_rsm_start = rsm->r_start; rack->r_ctl.rc_cwnd_at = tp->snd_cwnd; rack->r_ctl.rc_ssthresh_at = tp->snd_ssthresh; rack_cong_signal(tp, NULL, CC_NDUPACK); return (rsm); } static uint32_t rack_get_persists_timer_val(struct tcpcb *tp, struct tcp_rack *rack) { int32_t t; int32_t tt; uint32_t ret_val; t = TICKS_2_MSEC((tp->t_srtt >> TCP_RTT_SHIFT) + ((tp->t_rttvar * 4) >> TCP_RTT_SHIFT)); TCPT_RANGESET(tt, t * tcp_backoff[tp->t_rxtshift], - tcp_persmin, tcp_persmax); + rack_persist_min, rack_persist_max); if (tp->t_rxtshift < TCP_MAXRXTSHIFT) tp->t_rxtshift++; rack->r_ctl.rc_hpts_flags |= PACE_TMR_PERSIT; ret_val = (uint32_t)tt; return (ret_val); } static uint32_t -rack_timer_start(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts) +rack_timer_start(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts, int sup_rack) { /* * Start the FR timer, we do this based on getting the first one in * the rc_tmap. Note that if its NULL we must stop the timer. in all * events we need to stop the running timer (if its running) before * starting the new one. */ - uint32_t thresh, exp, to, srtt, time_since_sent; + uint32_t thresh, exp, to, srtt, time_since_sent, tstmp_touse; uint32_t srtt_cur; int32_t idx; int32_t is_tlp_timer = 0; struct rack_sendmap *rsm; if (rack->t_timers_stopped) { /* All timers have been stopped none are to run */ return (0); } if (rack->rc_in_persist) { /* We can't start any timer in persists */ return (rack_get_persists_timer_val(tp, rack)); } + if ((tp->t_state < TCPS_ESTABLISHED) || + ((tp->t_flags & TF_SACK_PERMIT) == 0)) + goto activate_rxt; rsm = TAILQ_FIRST(&rack->r_ctl.rc_tmap); - if (rsm == NULL) { + if ((rsm == NULL) || sup_rack) { /* Nothing on the send map */ activate_rxt: + time_since_sent = 0; + rsm = TAILQ_FIRST(&rack->r_ctl.rc_tmap); + if (rsm) { + idx = rsm->r_rtr_cnt - 1; + if (TSTMP_GEQ(rsm->r_tim_lastsent[idx], rack->r_ctl.rc_tlp_rxt_last_time)) + tstmp_touse = rsm->r_tim_lastsent[idx]; + else + tstmp_touse = rack->r_ctl.rc_tlp_rxt_last_time; + if (TSTMP_GT(tstmp_touse, cts)) + time_since_sent = cts - tstmp_touse; + } if (SEQ_LT(tp->snd_una, tp->snd_max) || sbavail(&(tp->t_inpcb->inp_socket->so_snd))) { rack->r_ctl.rc_hpts_flags |= PACE_TMR_RXT; to = TICKS_2_MSEC(tp->t_rxtcur); + if (to > time_since_sent) + to -= time_since_sent; + else + to = rack->r_ctl.rc_min_to; if (to == 0) to = 1; return (to); } return (0); } if (rsm->r_flags & RACK_ACKED) { rsm = rack_find_lowest_rsm(rack); if (rsm == NULL) { /* No lowest? */ goto activate_rxt; } } + if (rack->sack_attack_disable) { + /* + * We don't want to do + * any TLP's if you are an attacker. + * Though if you are doing what + * is expected you may still have + * SACK-PASSED marks. + */ + goto activate_rxt; + } /* Convert from ms to usecs */ if (rsm->r_flags & RACK_SACK_PASSED) { if ((tp->t_flags & TF_SENTFIN) && ((tp->snd_max - tp->snd_una) == 1) && (rsm->r_flags & RACK_HAS_FIN)) { /* * We don't start a rack timer if all we have is a * FIN outstanding. */ goto activate_rxt; } - if (tp->t_srtt) { - srtt_cur = (tp->t_srtt >> TCP_RTT_SHIFT); - srtt = TICKS_2_MSEC(srtt_cur); - } else - srtt = RACK_INITIAL_RTO; - + if ((rack->use_rack_cheat == 0) && + (IN_RECOVERY(tp->t_flags)) && + (rack->r_ctl.rc_prr_sndcnt < ctf_fixed_maxseg(tp))) { + /* + * We are not cheating, in recovery and + * not enough ack's to yet get our next + * retransmission out. + * + * Note that classified attackers do not + * get to use the rack-cheat. + */ + goto activate_tlp; + } + srtt = rack_grab_rtt(tp, rack); thresh = rack_calc_thresh_rack(rack, srtt, cts); idx = rsm->r_rtr_cnt - 1; exp = rsm->r_tim_lastsent[idx] + thresh; if (SEQ_GEQ(exp, cts)) { to = exp - cts; if (to < rack->r_ctl.rc_min_to) { to = rack->r_ctl.rc_min_to; } } else { to = rack->r_ctl.rc_min_to; } } else { /* Ok we need to do a TLP not RACK */ +activate_tlp: if ((rack->rc_tlp_in_progress != 0) || (rack->r_ctl.rc_tlp_rtx_out != 0)) { /* * The previous send was a TLP or a tlp_rtx is in * process. */ goto activate_rxt; } - if ((tp->snd_max - tp->snd_una) > tp->snd_wnd) { - /* - * Peer collapsed rwnd, don't do TLP. - */ - goto activate_rxt; - } rsm = TAILQ_LAST_FAST(&rack->r_ctl.rc_tmap, rack_sendmap, r_tnext); if (rsm == NULL) { /* We found no rsm to TLP with. */ goto activate_rxt; } if (rsm->r_flags & RACK_HAS_FIN) { /* If its a FIN we dont do TLP */ rsm = NULL; goto activate_rxt; } idx = rsm->r_rtr_cnt - 1; - if (TSTMP_GT(cts, rsm->r_tim_lastsent[idx])) - time_since_sent = cts - rsm->r_tim_lastsent[idx]; - else - time_since_sent = 0; + time_since_sent = 0; + if (TSTMP_GEQ(rsm->r_tim_lastsent[idx], rack->r_ctl.rc_tlp_rxt_last_time)) + tstmp_touse = rsm->r_tim_lastsent[idx]; + else + tstmp_touse = rack->r_ctl.rc_tlp_rxt_last_time; + if (TSTMP_GT(tstmp_touse, cts)) + time_since_sent = cts - tstmp_touse; is_tlp_timer = 1; if (tp->t_srtt) { srtt_cur = (tp->t_srtt >> TCP_RTT_SHIFT); srtt = TICKS_2_MSEC(srtt_cur); } else srtt = RACK_INITIAL_RTO; thresh = rack_calc_thresh_tlp(tp, rack, rsm, srtt); if (thresh > time_since_sent) to = thresh - time_since_sent; else to = rack->r_ctl.rc_min_to; if (to > TCPTV_REXMTMAX) { /* * If the TLP time works out to larger than the max * RTO lets not do TLP.. just RTO. */ goto activate_rxt; } if (rsm->r_start != rack->r_ctl.rc_last_tlp_seq) { /* * The tail is no longer the last one I did a probe * on */ rack->r_ctl.rc_tlp_seg_send_cnt = 0; rack->r_ctl.rc_last_tlp_seq = rsm->r_start; } } if (is_tlp_timer == 0) { rack->r_ctl.rc_hpts_flags |= PACE_TMR_RACK; } else { if ((rack->r_ctl.rc_tlp_send_cnt > rack_tlp_max_resend) || (rack->r_ctl.rc_tlp_seg_send_cnt > rack_tlp_max_resend)) { /* * We have exceeded how many times we can retran the * current TLP timer, switch to the RTO timer. */ goto activate_rxt; } else { rack->r_ctl.rc_hpts_flags |= PACE_TMR_TLP; } } if (to == 0) to = 1; return (to); } static void rack_enter_persist(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts) { if (rack->rc_in_persist == 0) { - if (((tp->t_flags & TF_SENTFIN) == 0) && - (tp->snd_max - tp->snd_una) >= sbavail(&rack->rc_inp->inp_socket->so_snd)) - /* Must need to send more data to enter persist */ - return; rack->r_ctl.rc_went_idle_time = cts; rack_timer_cancel(tp, rack, cts, __LINE__); tp->t_rxtshift = 0; rack->rc_in_persist = 1; } } static void rack_exit_persist(struct tcpcb *tp, struct tcp_rack *rack) { if (rack->rc_inp->inp_in_hpts) { tcp_hpts_remove(rack->rc_inp, HPTS_REMOVE_OUTPUT); rack->r_ctl.rc_hpts_flags = 0; } rack->rc_in_persist = 0; rack->r_ctl.rc_went_idle_time = 0; tp->t_flags &= ~TF_FORCEDATA; tp->t_rxtshift = 0; } static void -rack_start_hpts_timer(struct tcp_rack *rack, struct tcpcb *tp, uint32_t cts, int32_t line, - int32_t slot, uint32_t tot_len_this_send, int32_t frm_out_sbavail) +rack_start_hpts_timer(struct tcp_rack *rack, struct tcpcb *tp, uint32_t cts, + int32_t slot, uint32_t tot_len_this_send, int sup_rack) { struct inpcb *inp; uint32_t delayed_ack = 0; uint32_t hpts_timeout; uint8_t stopped; uint32_t left = 0; inp = tp->t_inpcb; if (inp->inp_in_hpts) { /* A previous call is already set up */ return; } - if ((tp->t_state == TCPS_CLOSED) || (tp->t_state == TCPS_LISTEN)) { return; } stopped = rack->rc_tmr_stopped; if (stopped && TSTMP_GT(rack->r_ctl.rc_timer_exp, cts)) { left = rack->r_ctl.rc_timer_exp - cts; } + rack->tlp_timer_up = 0; rack->r_ctl.rc_timer_exp = 0; if (rack->rc_inp->inp_in_hpts == 0) { rack->r_ctl.rc_hpts_flags = 0; } if (slot) { /* We are hptsi too */ rack->r_ctl.rc_hpts_flags |= PACE_PKT_OUTPUT; } else if (rack->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) { /* * We are still left on the hpts when the to goes * it will be for output. */ if (TSTMP_GT(rack->r_ctl.rc_last_output_to, cts)) slot = rack->r_ctl.rc_last_output_to - cts; else slot = 1; } - if ((tp->snd_wnd == 0) && TCPS_HAVEESTABLISHED(tp->t_state)) { - /* No send window.. we must enter persist */ - rack_enter_persist(tp, rack, cts); - } else if ((frm_out_sbavail && - (frm_out_sbavail > (tp->snd_max - tp->snd_una)) && - (tp->snd_wnd < tp->t_maxseg)) && - TCPS_HAVEESTABLISHED(tp->t_state)) { + hpts_timeout = rack_timer_start(tp, rack, cts, sup_rack); + if (rack->sack_attack_disable && + (slot < USEC_TO_MSEC(tcp_sad_pacing_interval))) { /* - * If we have no window or we can't send a segment (and have - * data to send.. we cheat here and frm_out_sbavail is - * passed in with the sbavail(sb) only from bbr_output) and - * we are established, then we must enter persits (if not - * already in persits). + * We have a potential attacker on + * the line. We have possibly some + * (or now) pacing time set. We want to + * slow down the processing of sacks by some + * amount (if it is an attacker). Set the default + * slot for attackers in place (unless the orginal + * interval is longer). Its stored in + * micro-seconds, so lets convert to msecs. */ - rack_enter_persist(tp, rack, cts); + slot = USEC_TO_MSEC(tcp_sad_pacing_interval); } - hpts_timeout = rack_timer_start(tp, rack, cts); if (tp->t_flags & TF_DELACK) { delayed_ack = TICKS_2_MSEC(tcp_delacktime); rack->r_ctl.rc_hpts_flags |= PACE_TMR_DELACK; } if (delayed_ack && ((hpts_timeout == 0) || (delayed_ack < hpts_timeout))) hpts_timeout = delayed_ack; else rack->r_ctl.rc_hpts_flags &= ~PACE_TMR_DELACK; /* * If no timers are going to run and we will fall off the hptsi * wheel, we resort to a keep-alive timer if its configured. */ if ((hpts_timeout == 0) && (slot == 0)) { if ((tcp_always_keepalive || inp->inp_socket->so_options & SO_KEEPALIVE) && (tp->t_state <= TCPS_CLOSING)) { /* * Ok we have no timer (persists, rack, tlp, rxt or * del-ack), we don't have segments being paced. So * all that is left is the keepalive timer. */ if (TCPS_HAVEESTABLISHED(tp->t_state)) { /* Get the established keep-alive time */ hpts_timeout = TP_KEEPIDLE(tp); } else { /* Get the initial setup keep-alive time */ hpts_timeout = TP_KEEPINIT(tp); } rack->r_ctl.rc_hpts_flags |= PACE_TMR_KEEP; } } if (left && (stopped & (PACE_TMR_KEEP | PACE_TMR_DELACK)) == (rack->r_ctl.rc_hpts_flags & PACE_TMR_MASK)) { /* * RACK, TLP, persists and RXT timers all are restartable * based on actions input .. i.e we received a packet (ack * or sack) and that changes things (rw, or snd_una etc). * Thus we can restart them with a new value. For * keep-alive, delayed_ack we keep track of what was left * and restart the timer with a smaller value. */ if (left < hpts_timeout) hpts_timeout = left; } if (hpts_timeout) { /* * Hack alert for now we can't time-out over 2,147,483 * seconds (a bit more than 596 hours), which is probably ok * :). */ if (hpts_timeout > 0x7ffffffe) hpts_timeout = 0x7ffffffe; rack->r_ctl.rc_timer_exp = cts + hpts_timeout; } if (slot) { + rack->rc_inp->inp_flags2 |= INP_MBUF_QUEUE_READY; + if (rack->r_ctl.rc_hpts_flags & PACE_TMR_RACK) + inp->inp_flags2 |= INP_DONT_SACK_QUEUE; + else + inp->inp_flags2 &= ~INP_DONT_SACK_QUEUE; rack->r_ctl.rc_last_output_to = cts + slot; if ((hpts_timeout == 0) || (hpts_timeout > slot)) { if (rack->rc_inp->inp_in_hpts == 0) tcp_hpts_insert(tp->t_inpcb, HPTS_MS_TO_SLOTS(slot)); rack_log_to_start(rack, cts, hpts_timeout, slot, 1); } else { /* * Arrange for the hpts to kick back in after the * t-o if the t-o does not cause a send. */ if (rack->rc_inp->inp_in_hpts == 0) tcp_hpts_insert(tp->t_inpcb, HPTS_MS_TO_SLOTS(hpts_timeout)); rack_log_to_start(rack, cts, hpts_timeout, slot, 0); } } else if (hpts_timeout) { + if (rack->r_ctl.rc_hpts_flags & PACE_TMR_RACK) { + /* For a rack timer, don't wake us */ + rack->rc_inp->inp_flags2 |= INP_MBUF_QUEUE_READY; + inp->inp_flags2 |= INP_DONT_SACK_QUEUE; + } else { + /* All other timers wake us up */ + rack->rc_inp->inp_flags2 &= ~INP_MBUF_QUEUE_READY; + inp->inp_flags2 &= ~INP_DONT_SACK_QUEUE; + } if (rack->rc_inp->inp_in_hpts == 0) tcp_hpts_insert(tp->t_inpcb, HPTS_MS_TO_SLOTS(hpts_timeout)); rack_log_to_start(rack, cts, hpts_timeout, slot, 0); } else { /* No timer starting */ #ifdef INVARIANTS if (SEQ_GT(tp->snd_max, tp->snd_una)) { panic("tp:%p rack:%p tlts:%d cts:%u slot:%u pto:%u -- no timer started?", tp, rack, tot_len_this_send, cts, slot, hpts_timeout); } #endif } rack->rc_tmr_stopped = 0; if (slot) rack_log_type_bbrsnd(rack, tot_len_this_send, slot, cts); } /* * RACK Timer, here we simply do logging and house keeping. * the normal rack_output() function will call the * appropriate thing to check if we need to do a RACK retransmit. * We return 1, saying don't proceed with rack_output only * when all timers have been stopped (destroyed PCB?). */ static int rack_timeout_rack(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts) { /* * This timer simply provides an internal trigger to send out data. * The check_recovery_mode call will see if there are needed * retransmissions, if so we will enter fast-recovery. The output * call may or may not do the same thing depending on sysctl * settings. */ struct rack_sendmap *rsm; - int32_t recovery; + int32_t recovery, ll; if (tp->t_timers->tt_flags & TT_STOPPED) { return (1); } if (TSTMP_LT(cts, rack->r_ctl.rc_timer_exp)) { /* Its not time yet */ return (0); } - rack_log_to_event(rack, RACK_TO_FRM_RACK); recovery = IN_RECOVERY(tp->t_flags); counter_u64_add(rack_to_tot, 1); if (rack->r_state && (rack->r_state != tp->t_state)) rack_set_state(tp, rack); rsm = rack_check_recovery_mode(tp, cts); + if (rsm) + ll = rsm->r_end - rsm->r_start; + else + ll = 0; + rack_log_to_event(rack, RACK_TO_FRM_RACK, ll); if (rsm) { uint32_t rtt; rtt = rack->rc_rack_rtt; if (rtt == 0) rtt = 1; if ((recovery == 0) && - (rack->r_ctl.rc_prr_sndcnt < tp->t_maxseg)) { + (rack->r_ctl.rc_prr_sndcnt < ctf_fixed_maxseg(tp))) { /* * The rack-timeout that enter's us into recovery * will force out one MSS and set us up so that we * can do one more send in 2*rtt (transitioning the * rack timeout into a rack-tlp). */ - rack->r_ctl.rc_prr_sndcnt = tp->t_maxseg; - } else if ((rack->r_ctl.rc_prr_sndcnt < tp->t_maxseg) && - ((rsm->r_end - rsm->r_start) > rack->r_ctl.rc_prr_sndcnt)) { + rack->r_ctl.rc_prr_sndcnt = ctf_fixed_maxseg(tp); + rack_log_to_prr(rack, 3); + } else if ((rack->r_ctl.rc_prr_sndcnt < (rsm->r_end - rsm->r_start)) && + rack->use_rack_cheat) { /* - * When a rack timer goes, we have to send at - * least one segment. They will be paced a min of 1ms - * apart via the next rack timer (or further - * if the rack timer dictates it). + * When a rack timer goes, if the rack cheat is + * on, arrange it so we can send a full segment. */ - rack->r_ctl.rc_prr_sndcnt = tp->t_maxseg; + rack->r_ctl.rc_prr_sndcnt = ctf_fixed_maxseg(tp); + rack_log_to_prr(rack, 4); } } else { /* This is a case that should happen rarely if ever */ counter_u64_add(rack_tlp_does_nada, 1); #ifdef TCP_BLACKBOX tcp_log_dump_tp_logbuf(tp, "nada counter trips", M_NOWAIT, true); #endif rack->r_ctl.rc_resend = TAILQ_FIRST(&rack->r_ctl.rc_tmap); } rack->r_ctl.rc_hpts_flags &= ~PACE_TMR_RACK; return (0); } +static __inline void +rack_clone_rsm(struct tcp_rack *rack, struct rack_sendmap *nrsm, + struct rack_sendmap *rsm, uint32_t start) +{ + int idx; + + nrsm->r_start = start; + nrsm->r_end = rsm->r_end; + nrsm->r_rtr_cnt = rsm->r_rtr_cnt; + nrsm->r_flags = rsm->r_flags; + nrsm->r_dupack = rsm->r_dupack; + nrsm->r_rtr_bytes = 0; + rsm->r_end = nrsm->r_start; + for (idx = 0; idx < nrsm->r_rtr_cnt; idx++) { + nrsm->r_tim_lastsent[idx] = rsm->r_tim_lastsent[idx]; + } +} + static struct rack_sendmap * rack_merge_rsm(struct tcp_rack *rack, struct rack_sendmap *l_rsm, struct rack_sendmap *r_rsm) { /* * We are merging two ack'd RSM's, * the l_rsm is on the left (lower seq * values) and the r_rsm is on the right * (higher seq value). The simplest way * to merge these is to move the right * one into the left. I don't think there * is any reason we need to try to find * the oldest (or last oldest retransmitted). */ + struct rack_sendmap *rm; + l_rsm->r_end = r_rsm->r_end; + if (l_rsm->r_dupack < r_rsm->r_dupack) + l_rsm->r_dupack = r_rsm->r_dupack; if (r_rsm->r_rtr_bytes) l_rsm->r_rtr_bytes += r_rsm->r_rtr_bytes; if (r_rsm->r_in_tmap) { /* This really should not happen */ TAILQ_REMOVE(&rack->r_ctl.rc_tmap, r_rsm, r_tnext); + r_rsm->r_in_tmap = 0; } /* Now the flags */ if (r_rsm->r_flags & RACK_HAS_FIN) l_rsm->r_flags |= RACK_HAS_FIN; if (r_rsm->r_flags & RACK_TLP) l_rsm->r_flags |= RACK_TLP; - TAILQ_REMOVE(&rack->r_ctl.rc_map, r_rsm, r_next); + if (r_rsm->r_flags & RACK_RWND_COLLAPSED) + l_rsm->r_flags |= RACK_RWND_COLLAPSED; + rm = RB_REMOVE(rack_rb_tree_head, &rack->r_ctl.rc_mtree, r_rsm); +#ifdef INVARIANTS + if (rm != r_rsm) { + panic("removing head in rack:%p rsm:%p rm:%p", + rack, r_rsm, rm); + } +#endif if ((r_rsm->r_limit_type == 0) && (l_rsm->r_limit_type != 0)) { /* Transfer the split limit to the map we free */ r_rsm->r_limit_type = l_rsm->r_limit_type; l_rsm->r_limit_type = 0; } rack_free(rack, r_rsm); return(l_rsm); } /* * TLP Timer, here we simply setup what segment we want to * have the TLP expire on, the normal rack_output() will then * send it out. * * We return 1, saying don't proceed with rack_output only * when all timers have been stopped (destroyed PCB?). */ static int rack_timeout_tlp(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts) { /* * Tail Loss Probe. */ struct rack_sendmap *rsm = NULL; + struct rack_sendmap *insret; struct socket *so; uint32_t amm, old_prr_snd = 0; uint32_t out, avail; + int collapsed_win = 0; if (tp->t_timers->tt_flags & TT_STOPPED) { return (1); } if (TSTMP_LT(cts, rack->r_ctl.rc_timer_exp)) { /* Its not time yet */ return (0); } if (rack_progress_timeout_check(tp)) { tcp_set_inp_to_drop(tp->t_inpcb, ETIMEDOUT); return (1); } /* * A TLP timer has expired. We have been idle for 2 rtts. So we now * need to figure out how to force a full MSS segment out. */ - rack_log_to_event(rack, RACK_TO_FRM_TLP); + rack_log_to_event(rack, RACK_TO_FRM_TLP, 0); counter_u64_add(rack_tlp_tot, 1); if (rack->r_state && (rack->r_state != tp->t_state)) rack_set_state(tp, rack); so = tp->t_inpcb->inp_socket; +#ifdef KERN_TLS + if (rack->rc_inp->inp_socket->so_snd.sb_flags & SB_TLS_IFNET) { + /* + * For hardware TLS we do *not* want to send + * new data, lets instead just do a retransmission. + */ + goto need_retran; + } +#endif avail = sbavail(&so->so_snd); out = tp->snd_max - tp->snd_una; - rack->rc_timer_up = 1; + rack->tlp_timer_up = 1; + if (out > tp->snd_wnd) { + /* special case, we need a retransmission */ + collapsed_win = 1; + goto need_retran; + } /* * If we are in recovery we can jazz out a segment if new data is * present simply by setting rc_prr_sndcnt to a segment. */ if ((avail > out) && ((rack_always_send_oldest == 0) || (TAILQ_EMPTY(&rack->r_ctl.rc_tmap)))) { /* New data is available */ amm = avail - out; - if (amm > tp->t_maxseg) { - amm = tp->t_maxseg; - } else if ((amm < tp->t_maxseg) && ((tp->t_flags & TF_NODELAY) == 0)) { + if (amm > ctf_fixed_maxseg(tp)) { + amm = ctf_fixed_maxseg(tp); + } else if ((amm < ctf_fixed_maxseg(tp)) && ((tp->t_flags & TF_NODELAY) == 0)) { /* not enough to fill a MTU and no-delay is off */ goto need_retran; } if (IN_RECOVERY(tp->t_flags)) { /* Unlikely */ old_prr_snd = rack->r_ctl.rc_prr_sndcnt; - if (out + amm <= tp->snd_wnd) + if (out + amm <= tp->snd_wnd) { rack->r_ctl.rc_prr_sndcnt = amm; - else + rack_log_to_prr(rack, 4); + } else goto need_retran; } else { /* Set the send-new override */ if (out + amm <= tp->snd_wnd) rack->r_ctl.rc_tlp_new_data = amm; else goto need_retran; } rack->r_ctl.rc_tlp_seg_send_cnt = 0; rack->r_ctl.rc_last_tlp_seq = tp->snd_max; rack->r_ctl.rc_tlpsend = NULL; counter_u64_add(rack_tlp_newdata, 1); goto send; } need_retran: /* * Ok we need to arrange the last un-acked segment to be re-sent, or * optionally the first un-acked segment. */ - if (rack_always_send_oldest) - rsm = TAILQ_FIRST(&rack->r_ctl.rc_tmap); - else { - rsm = TAILQ_LAST_FAST(&rack->r_ctl.rc_map, rack_sendmap, r_next); - if (rsm && (rsm->r_flags & (RACK_ACKED | RACK_HAS_FIN))) { - rsm = rack_find_high_nonack(rack, rsm); + if (collapsed_win == 0) { + if (rack_always_send_oldest) + rsm = TAILQ_FIRST(&rack->r_ctl.rc_tmap); + else { + rsm = RB_MAX(rack_rb_tree_head, &rack->r_ctl.rc_mtree); + if (rsm && (rsm->r_flags & (RACK_ACKED | RACK_HAS_FIN))) { + rsm = rack_find_high_nonack(rack, rsm); + } } - } - if (rsm == NULL) { - counter_u64_add(rack_tlp_does_nada, 1); + if (rsm == NULL) { + counter_u64_add(rack_tlp_does_nada, 1); #ifdef TCP_BLACKBOX - tcp_log_dump_tp_logbuf(tp, "nada counter trips", M_NOWAIT, true); + tcp_log_dump_tp_logbuf(tp, "nada counter trips", M_NOWAIT, true); #endif - goto out; + goto out; + } + } else { + /* + * We must find the last segment + * that was acceptable by the client. + */ + RB_FOREACH_REVERSE(rsm, rack_rb_tree_head, &rack->r_ctl.rc_mtree) { + if ((rsm->r_flags & RACK_RWND_COLLAPSED) == 0) { + /* Found one */ + break; + } + } + if (rsm == NULL) { + /* None? if so send the first */ + rsm = RB_MIN(rack_rb_tree_head, &rack->r_ctl.rc_mtree); + if (rsm == NULL) { + counter_u64_add(rack_tlp_does_nada, 1); +#ifdef TCP_BLACKBOX + tcp_log_dump_tp_logbuf(tp, "nada counter trips", M_NOWAIT, true); +#endif + goto out; + } + } } - if ((rsm->r_end - rsm->r_start) > tp->t_maxseg) { + if ((rsm->r_end - rsm->r_start) > ctf_fixed_maxseg(tp)) { /* * We need to split this the last segment in two. */ - int32_t idx; struct rack_sendmap *nrsm; + nrsm = rack_alloc_full_limit(rack); if (nrsm == NULL) { /* * No memory to split, we will just exit and punt * off to the RXT timer. */ counter_u64_add(rack_tlp_does_nada, 1); goto out; } - nrsm->r_start = (rsm->r_end - tp->t_maxseg); - nrsm->r_end = rsm->r_end; - nrsm->r_rtr_cnt = rsm->r_rtr_cnt; - nrsm->r_flags = rsm->r_flags; - nrsm->r_sndcnt = rsm->r_sndcnt; - nrsm->r_rtr_bytes = 0; - rsm->r_end = nrsm->r_start; - for (idx = 0; idx < nrsm->r_rtr_cnt; idx++) { - nrsm->r_tim_lastsent[idx] = rsm->r_tim_lastsent[idx]; + rack_clone_rsm(rack, nrsm, rsm, + (rsm->r_end - ctf_fixed_maxseg(tp))); + insret = RB_INSERT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, nrsm); +#ifdef INVARIANTS + if (insret != NULL) { + panic("Insert in rb tree of %p fails ret:%p rack:%p rsm:%p", + nrsm, insret, rack, rsm); } - TAILQ_INSERT_AFTER(&rack->r_ctl.rc_map, rsm, nrsm, r_next); +#endif if (rsm->r_in_tmap) { TAILQ_INSERT_AFTER(&rack->r_ctl.rc_tmap, rsm, nrsm, r_tnext); nrsm->r_in_tmap = 1; } rsm->r_flags &= (~RACK_HAS_FIN); rsm = nrsm; } rack->r_ctl.rc_tlpsend = rsm; rack->r_ctl.rc_tlp_rtx_out = 1; if (rsm->r_start == rack->r_ctl.rc_last_tlp_seq) { rack->r_ctl.rc_tlp_seg_send_cnt++; tp->t_rxtshift++; } else { rack->r_ctl.rc_last_tlp_seq = rsm->r_start; rack->r_ctl.rc_tlp_seg_send_cnt = 1; } send: rack->r_ctl.rc_tlp_send_cnt++; if (rack->r_ctl.rc_tlp_send_cnt > rack_tlp_max_resend) { /* * Can't [re]/transmit a segment we have not heard from the * peer in max times. We need the retransmit timer to take * over. */ -restore: + restore: rack->r_ctl.rc_tlpsend = NULL; if (rsm) rsm->r_flags &= ~RACK_TLP; rack->r_ctl.rc_prr_sndcnt = old_prr_snd; + rack_log_to_prr(rack, 5); counter_u64_add(rack_tlp_retran_fail, 1); goto out; } else if (rsm) { rsm->r_flags |= RACK_TLP; } if (rsm && (rsm->r_start == rack->r_ctl.rc_last_tlp_seq) && (rack->r_ctl.rc_tlp_seg_send_cnt > rack_tlp_max_resend)) { /* * We don't want to send a single segment more than the max * either. */ goto restore; } rack->r_timer_override = 1; rack->r_tlp_running = 1; rack->rc_tlp_in_progress = 1; rack->r_ctl.rc_hpts_flags &= ~PACE_TMR_TLP; return (0); out: - rack->rc_timer_up = 0; + rack->tlp_timer_up = 0; rack->r_ctl.rc_hpts_flags &= ~PACE_TMR_TLP; return (0); } /* * Delayed ack Timer, here we simply need to setup the * ACK_NOW flag and remove the DELACK flag. From there * the output routine will send the ack out. * * We only return 1, saying don't proceed, if all timers * are stopped (destroyed PCB?). */ static int rack_timeout_delack(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts) { if (tp->t_timers->tt_flags & TT_STOPPED) { return (1); } - rack_log_to_event(rack, RACK_TO_FRM_DELACK); + rack_log_to_event(rack, RACK_TO_FRM_DELACK, 0); tp->t_flags &= ~TF_DELACK; tp->t_flags |= TF_ACKNOW; TCPSTAT_INC(tcps_delack); rack->r_ctl.rc_hpts_flags &= ~PACE_TMR_DELACK; return (0); } /* * Persists timer, here we simply need to setup the * FORCE-DATA flag the output routine will send * the one byte send. * * We only return 1, saying don't proceed, if all timers * are stopped (destroyed PCB?). */ static int rack_timeout_persist(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts) { + struct tcptemp *t_template; struct inpcb *inp; - int32_t retval = 0; + int32_t retval = 1; inp = tp->t_inpcb; if (tp->t_timers->tt_flags & TT_STOPPED) { return (1); } if (rack->rc_in_persist == 0) return (0); if (rack_progress_timeout_check(tp)) { tcp_set_inp_to_drop(inp, ETIMEDOUT); return (1); } KASSERT(inp != NULL, ("%s: tp %p tp->t_inpcb == NULL", __func__, tp)); /* * Persistence timer into zero window. Force a byte to be output, if * possible. */ TCPSTAT_INC(tcps_persisttimeo); /* * Hack: if the peer is dead/unreachable, we do not time out if the * window is closed. After a full backoff, drop the connection if * the idle time (no responses to probes) reaches the maximum * backoff that we would use if retransmitting. */ if (tp->t_rxtshift == TCP_MAXRXTSHIFT && (ticks - tp->t_rcvtime >= tcp_maxpersistidle || ticks - tp->t_rcvtime >= TCP_REXMTVAL(tp) * tcp_totbackoff)) { TCPSTAT_INC(tcps_persistdrop); retval = 1; tcp_set_inp_to_drop(rack->rc_inp, ETIMEDOUT); goto out; } if ((sbavail(&rack->rc_inp->inp_socket->so_snd) == 0) && tp->snd_una == tp->snd_max) rack_exit_persist(tp, rack); rack->r_ctl.rc_hpts_flags &= ~PACE_TMR_PERSIT; /* * If the user has closed the socket then drop a persisting * connection after a much reduced timeout. */ if (tp->t_state > TCPS_CLOSE_WAIT && (ticks - tp->t_rcvtime) >= TCPTV_PERSMAX) { retval = 1; TCPSTAT_INC(tcps_persistdrop); tcp_set_inp_to_drop(rack->rc_inp, ETIMEDOUT); goto out; } - tp->t_flags |= TF_FORCEDATA; + t_template = tcpip_maketemplate(rack->rc_inp); + if (t_template) { + tcp_respond(tp, t_template->tt_ipgen, + &t_template->tt_t, (struct mbuf *)NULL, + tp->rcv_nxt, tp->snd_una - 1, 0); + /* This sends an ack */ + if (tp->t_flags & TF_DELACK) + tp->t_flags &= ~TF_DELACK; + free(t_template, M_TEMP); + } + if (tp->t_rxtshift < TCP_MAXRXTSHIFT) + tp->t_rxtshift++; out: - rack_log_to_event(rack, RACK_TO_FRM_PERSIST); + rack_log_to_event(rack, RACK_TO_FRM_PERSIST, 0); + rack_start_hpts_timer(rack, tp, cts, + 0, 0, 0); return (retval); } /* * If a keepalive goes off, we had no other timers * happening. We always return 1 here since this * routine either drops the connection or sends * out a segment with respond. */ static int rack_timeout_keepalive(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts) { struct tcptemp *t_template; struct inpcb *inp; if (tp->t_timers->tt_flags & TT_STOPPED) { return (1); } rack->r_ctl.rc_hpts_flags &= ~PACE_TMR_KEEP; inp = tp->t_inpcb; - rack_log_to_event(rack, RACK_TO_FRM_KEEP); + rack_log_to_event(rack, RACK_TO_FRM_KEEP, 0); /* * Keep-alive timer went off; send something or drop connection if * idle for too long. */ TCPSTAT_INC(tcps_keeptimeo); if (tp->t_state < TCPS_ESTABLISHED) goto dropit; if ((tcp_always_keepalive || inp->inp_socket->so_options & SO_KEEPALIVE) && tp->t_state <= TCPS_CLOSING) { if (ticks - tp->t_rcvtime >= TP_KEEPIDLE(tp) + TP_MAXIDLE(tp)) goto dropit; /* * Send a packet designed to force a response if the peer is * up and reachable: either an ACK if the connection is * still alive, or an RST if the peer has closed the * connection due to timeout or reboot. Using sequence * number tp->snd_una-1 causes the transmitted zero-length * segment to lie outside the receive window; by the * protocol spec, this requires the correspondent TCP to * respond. */ TCPSTAT_INC(tcps_keepprobe); t_template = tcpip_maketemplate(inp); if (t_template) { tcp_respond(tp, t_template->tt_ipgen, &t_template->tt_t, (struct mbuf *)NULL, tp->rcv_nxt, tp->snd_una - 1, 0); free(t_template, M_TEMP); } } - rack_start_hpts_timer(rack, tp, cts, __LINE__, 0, 0, 0); + rack_start_hpts_timer(rack, tp, cts, 0, 0, 0); return (1); dropit: TCPSTAT_INC(tcps_keepdrops); tcp_set_inp_to_drop(rack->rc_inp, ETIMEDOUT); return (1); } /* * Retransmit helper function, clear up all the ack * flags and take care of important book keeping. */ static void rack_remxt_tmr(struct tcpcb *tp) { /* * The retransmit timer went off, all sack'd blocks must be * un-acked. */ struct rack_sendmap *rsm, *trsm = NULL; struct tcp_rack *rack; int32_t cnt = 0; rack = (struct tcp_rack *)tp->t_fb_ptr; rack_timer_cancel(tp, rack, tcp_ts_getticks(), __LINE__); - rack_log_to_event(rack, RACK_TO_FRM_TMR); + rack_log_to_event(rack, RACK_TO_FRM_TMR, 0); if (rack->r_state && (rack->r_state != tp->t_state)) rack_set_state(tp, rack); /* * Ideally we would like to be able to * mark SACK-PASS on anything not acked here. * However, if we do that we would burst out * all that data 1ms apart. This would be unwise, * so for now we will just let the normal rxt timer * and tlp timer take care of it. */ - TAILQ_FOREACH(rsm, &rack->r_ctl.rc_map, r_next) { + RB_FOREACH(rsm, rack_rb_tree_head, &rack->r_ctl.rc_mtree) { if (rsm->r_flags & RACK_ACKED) { cnt++; - rsm->r_sndcnt = 0; + rsm->r_dupack = 0; + rack_log_retran_reason(rack, rsm, __LINE__, 0, 2); if (rsm->r_in_tmap == 0) { /* We must re-add it back to the tlist */ if (trsm == NULL) { TAILQ_INSERT_HEAD(&rack->r_ctl.rc_tmap, rsm, r_tnext); } else { TAILQ_INSERT_AFTER(&rack->r_ctl.rc_tmap, trsm, rsm, r_tnext); } rsm->r_in_tmap = 1; - trsm = rsm; } } + trsm = rsm; rsm->r_flags &= ~(RACK_ACKED | RACK_SACK_PASSED | RACK_WAS_SACKPASS); } /* Clear the count (we just un-acked them) */ rack->r_ctl.rc_sacked = 0; /* Clear the tlp rtx mark */ rack->r_ctl.rc_tlp_rtx_out = 0; rack->r_ctl.rc_tlp_seg_send_cnt = 0; - rack->r_ctl.rc_resend = TAILQ_FIRST(&rack->r_ctl.rc_map); - /* Setup so we send one segment */ - if (rack->r_ctl.rc_prr_sndcnt < tp->t_maxseg) - rack->r_ctl.rc_prr_sndcnt = tp->t_maxseg; + rack->r_ctl.rc_resend = RB_MIN(rack_rb_tree_head, &rack->r_ctl.rc_mtree); + rack->r_ctl.rc_prr_sndcnt = 0; + rack_log_to_prr(rack, 6); rack->r_timer_override = 1; } /* * Re-transmit timeout! If we drop the PCB we will return 1, otherwise * we will setup to retransmit the lowest seq number outstanding. */ static int rack_timeout_rxt(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts) { int32_t rexmt; struct inpcb *inp; int32_t retval = 0; inp = tp->t_inpcb; if (tp->t_timers->tt_flags & TT_STOPPED) { return (1); } if (rack_progress_timeout_check(tp)) { tcp_set_inp_to_drop(inp, ETIMEDOUT); return (1); } rack->r_ctl.rc_hpts_flags &= ~PACE_TMR_RXT; if (TCPS_HAVEESTABLISHED(tp->t_state) && (tp->snd_una == tp->snd_max)) { /* Nothing outstanding .. nothing to do */ return (0); } /* * Retransmission timer went off. Message has not been acked within * retransmit interval. Back off to a longer retransmit interval * and retransmit one segment. */ - if (++tp->t_rxtshift > TCP_MAXRXTSHIFT) { + rack_remxt_tmr(tp); + if ((rack->r_ctl.rc_resend == NULL) || + ((rack->r_ctl.rc_resend->r_flags & RACK_RWND_COLLAPSED) == 0)) { + /* + * If the rwnd collapsed on + * the one we are retransmitting + * it does not count against the + * rxt count. + */ + tp->t_rxtshift++; + } + if (tp->t_rxtshift > TCP_MAXRXTSHIFT) { tp->t_rxtshift = TCP_MAXRXTSHIFT; TCPSTAT_INC(tcps_timeoutdrop); retval = 1; tcp_set_inp_to_drop(rack->rc_inp, (tp->t_softerror ? (uint16_t) tp->t_softerror : ETIMEDOUT)); goto out; } - rack_remxt_tmr(tp); if (tp->t_state == TCPS_SYN_SENT) { /* * If the SYN was retransmitted, indicate CWND to be limited * to 1 segment in cc_conn_init(). */ tp->snd_cwnd = 1; } else if (tp->t_rxtshift == 1) { /* * first retransmit; record ssthresh and cwnd so they can be * recovered if this turns out to be a "bad" retransmit. A * retransmit is considered "bad" if an ACK for this segment * is received within RTT/2 interval; the assumption here is * that the ACK was already in flight. See "On Estimating * End-to-End Network Path Properties" by Allman and Paxson * for more details. */ tp->snd_cwnd_prev = tp->snd_cwnd; tp->snd_ssthresh_prev = tp->snd_ssthresh; tp->snd_recover_prev = tp->snd_recover; if (IN_FASTRECOVERY(tp->t_flags)) tp->t_flags |= TF_WASFRECOVERY; else tp->t_flags &= ~TF_WASFRECOVERY; if (IN_CONGRECOVERY(tp->t_flags)) tp->t_flags |= TF_WASCRECOVERY; else tp->t_flags &= ~TF_WASCRECOVERY; tp->t_badrxtwin = ticks + (tp->t_srtt >> (TCP_RTT_SHIFT + 1)); tp->t_flags |= TF_PREVVALID; } else tp->t_flags &= ~TF_PREVVALID; TCPSTAT_INC(tcps_rexmttimeo); if ((tp->t_state == TCPS_SYN_SENT) || (tp->t_state == TCPS_SYN_RECEIVED)) - rexmt = MSEC_2_TICKS(RACK_INITIAL_RTO * tcp_syn_backoff[tp->t_rxtshift]); + rexmt = MSEC_2_TICKS(RACK_INITIAL_RTO * tcp_backoff[tp->t_rxtshift]); else rexmt = TCP_REXMTVAL(tp) * tcp_backoff[tp->t_rxtshift]; TCPT_RANGESET(tp->t_rxtcur, rexmt, max(MSEC_2_TICKS(rack_rto_min), rexmt), MSEC_2_TICKS(rack_rto_max)); /* * We enter the path for PLMTUD if connection is established or, if * connection is FIN_WAIT_1 status, reason for the last is that if * amount of data we send is very small, we could send it in couple * of packets and process straight to FIN. In that case we won't * catch ESTABLISHED state. */ if (V_tcp_pmtud_blackhole_detect && (((tp->t_state == TCPS_ESTABLISHED)) || (tp->t_state == TCPS_FIN_WAIT_1))) { #ifdef INET6 int32_t isipv6; #endif /* * Idea here is that at each stage of mtu probe (usually, * 1448 -> 1188 -> 524) should be given 2 chances to recover * before further clamping down. 'tp->t_rxtshift % 2 == 0' * should take care of that. */ if (((tp->t_flags2 & (TF2_PLPMTU_PMTUD | TF2_PLPMTU_MAXSEGSNT)) == (TF2_PLPMTU_PMTUD | TF2_PLPMTU_MAXSEGSNT)) && (tp->t_rxtshift >= 2 && tp->t_rxtshift < 6 && tp->t_rxtshift % 2 == 0)) { /* * Enter Path MTU Black-hole Detection mechanism: - * Disable Path MTU Discovery (IP "DF" bit). - * Reduce MTU to lower value than what we negotiated * with peer. */ if ((tp->t_flags2 & TF2_PLPMTU_BLACKHOLE) == 0) { /* Record that we may have found a black hole. */ tp->t_flags2 |= TF2_PLPMTU_BLACKHOLE; /* Keep track of previous MSS. */ tp->t_pmtud_saved_maxseg = tp->t_maxseg; } /* * Reduce the MSS to blackhole value or to the * default in an attempt to retransmit. */ #ifdef INET6 isipv6 = (tp->t_inpcb->inp_vflag & INP_IPV6) ? 1 : 0; if (isipv6 && tp->t_maxseg > V_tcp_v6pmtud_blackhole_mss) { /* Use the sysctl tuneable blackhole MSS. */ tp->t_maxseg = V_tcp_v6pmtud_blackhole_mss; TCPSTAT_INC(tcps_pmtud_blackhole_activated); } else if (isipv6) { /* Use the default MSS. */ tp->t_maxseg = V_tcp_v6mssdflt; /* * Disable Path MTU Discovery when we switch * to minmss. */ tp->t_flags2 &= ~TF2_PLPMTU_PMTUD; TCPSTAT_INC(tcps_pmtud_blackhole_activated_min_mss); } #endif #if defined(INET6) && defined(INET) else #endif #ifdef INET if (tp->t_maxseg > V_tcp_pmtud_blackhole_mss) { /* Use the sysctl tuneable blackhole MSS. */ tp->t_maxseg = V_tcp_pmtud_blackhole_mss; TCPSTAT_INC(tcps_pmtud_blackhole_activated); } else { /* Use the default MSS. */ tp->t_maxseg = V_tcp_mssdflt; /* * Disable Path MTU Discovery when we switch * to minmss. */ tp->t_flags2 &= ~TF2_PLPMTU_PMTUD; TCPSTAT_INC(tcps_pmtud_blackhole_activated_min_mss); } #endif } else { /* * If further retransmissions are still unsuccessful * with a lowered MTU, maybe this isn't a blackhole * and we restore the previous MSS and blackhole * detection flags. The limit '6' is determined by * giving each probe stage (1448, 1188, 524) 2 * chances to recover. */ if ((tp->t_flags2 & TF2_PLPMTU_BLACKHOLE) && (tp->t_rxtshift >= 6)) { tp->t_flags2 |= TF2_PLPMTU_PMTUD; tp->t_flags2 &= ~TF2_PLPMTU_BLACKHOLE; tp->t_maxseg = tp->t_pmtud_saved_maxseg; TCPSTAT_INC(tcps_pmtud_blackhole_failed); } } } /* - * Disable RFC1323 and SACK if we haven't got any response to our - * third SYN to work-around some broken terminal servers (most of - * which have hopefully been retired) that have bad VJ header - * compression code which trashes TCP segments containing - * unknown-to-them TCP options. - */ - if (tcp_rexmit_drop_options && (tp->t_state == TCPS_SYN_SENT) && - (tp->t_rxtshift == 3)) - tp->t_flags &= ~(TF_REQ_SCALE | TF_REQ_TSTMP | TF_SACK_PERMIT); - /* * If we backed off this far, our srtt estimate is probably bogus. * Clobber it so we'll take the next rtt measurement as our srtt; * move the current srtt into rttvar to keep the current retransmit * times until then. */ if (tp->t_rxtshift > TCP_MAXRXTSHIFT / 4) { #ifdef INET6 if ((tp->t_inpcb->inp_vflag & INP_IPV6) != 0) in6_losing(tp->t_inpcb); else #endif in_losing(tp->t_inpcb); tp->t_rttvar += (tp->t_srtt >> TCP_RTT_SHIFT); tp->t_srtt = 0; } if (rack_use_sack_filter) sack_filter_clear(&rack->r_ctl.rack_sf, tp->snd_una); tp->snd_recover = tp->snd_max; tp->t_flags |= TF_ACKNOW; tp->t_rtttime = 0; rack_cong_signal(tp, NULL, CC_RTO); out: return (retval); } static int rack_process_timers(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts, uint8_t hpts_calling) { int32_t ret = 0; int32_t timers = (rack->r_ctl.rc_hpts_flags & PACE_TMR_MASK); if (timers == 0) { return (0); } if (tp->t_state == TCPS_LISTEN) { /* no timers on listen sockets */ if (rack->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) return (0); return (1); } if (TSTMP_LT(cts, rack->r_ctl.rc_timer_exp)) { uint32_t left; if (rack->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) { ret = -1; rack_log_to_processing(rack, cts, ret, 0); return (0); } if (hpts_calling == 0) { ret = -2; rack_log_to_processing(rack, cts, ret, 0); return (0); } /* * Ok our timer went off early and we are not paced false * alarm, go back to sleep. */ ret = -3; left = rack->r_ctl.rc_timer_exp - cts; tcp_hpts_insert(tp->t_inpcb, HPTS_MS_TO_SLOTS(left)); rack_log_to_processing(rack, cts, ret, left); rack->rc_last_pto_set = 0; return (1); } rack->rc_tmr_stopped = 0; rack->r_ctl.rc_hpts_flags &= ~PACE_TMR_MASK; if (timers & PACE_TMR_DELACK) { ret = rack_timeout_delack(tp, rack, cts); } else if (timers & PACE_TMR_RACK) { + rack->r_ctl.rc_tlp_rxt_last_time = cts; ret = rack_timeout_rack(tp, rack, cts); } else if (timers & PACE_TMR_TLP) { + rack->r_ctl.rc_tlp_rxt_last_time = cts; ret = rack_timeout_tlp(tp, rack, cts); } else if (timers & PACE_TMR_RXT) { + rack->r_ctl.rc_tlp_rxt_last_time = cts; ret = rack_timeout_rxt(tp, rack, cts); } else if (timers & PACE_TMR_PERSIT) { ret = rack_timeout_persist(tp, rack, cts); } else if (timers & PACE_TMR_KEEP) { ret = rack_timeout_keepalive(tp, rack, cts); } rack_log_to_processing(rack, cts, ret, timers); return (ret); } static void rack_timer_cancel(struct tcpcb *tp, struct tcp_rack *rack, uint32_t cts, int line) { uint8_t hpts_removed = 0; if ((rack->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) && TSTMP_GEQ(cts, rack->r_ctl.rc_last_output_to)) { tcp_hpts_remove(rack->rc_inp, HPTS_REMOVE_OUTPUT); hpts_removed = 1; } if (rack->r_ctl.rc_hpts_flags & PACE_TMR_MASK) { rack->rc_tmr_stopped = rack->r_ctl.rc_hpts_flags & PACE_TMR_MASK; if (rack->rc_inp->inp_in_hpts && ((rack->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) == 0)) { /* * Canceling timer's when we have no output being * paced. We also must remove ourselves from the * hpts. */ tcp_hpts_remove(rack->rc_inp, HPTS_REMOVE_OUTPUT); hpts_removed = 1; } rack_log_to_cancel(rack, hpts_removed, line); rack->r_ctl.rc_hpts_flags &= ~(PACE_TMR_MASK); } } static void rack_timer_stop(struct tcpcb *tp, uint32_t timer_type) { return; } static int rack_stopall(struct tcpcb *tp) { struct tcp_rack *rack; rack = (struct tcp_rack *)tp->t_fb_ptr; rack->t_timers_stopped = 1; return (0); } static void rack_timer_activate(struct tcpcb *tp, uint32_t timer_type, uint32_t delta) { return; } static int rack_timer_active(struct tcpcb *tp, uint32_t timer_type) { return (0); } static void rack_stop_all_timers(struct tcpcb *tp) { struct tcp_rack *rack; /* * Assure no timers are running. */ if (tcp_timer_active(tp, TT_PERSIST)) { /* We enter in persists, set the flag appropriately */ rack = (struct tcp_rack *)tp->t_fb_ptr; rack->rc_in_persist = 1; } tcp_timer_suspend(tp, TT_PERSIST); tcp_timer_suspend(tp, TT_REXMT); tcp_timer_suspend(tp, TT_KEEP); tcp_timer_suspend(tp, TT_DELACK); } static void rack_update_rsm(struct tcpcb *tp, struct tcp_rack *rack, struct rack_sendmap *rsm, uint32_t ts) { int32_t idx; rsm->r_rtr_cnt++; - rsm->r_sndcnt++; + rack_log_retran_reason(rack, rsm, __LINE__, 0, 2); + rsm->r_dupack = 0; if (rsm->r_rtr_cnt > RACK_NUM_OF_RETRANS) { rsm->r_rtr_cnt = RACK_NUM_OF_RETRANS; rsm->r_flags |= RACK_OVERMAX; } if ((rsm->r_rtr_cnt > 1) && (rack->r_tlp_running == 0)) { rack->r_ctl.rc_holes_rxt += (rsm->r_end - rsm->r_start); rsm->r_rtr_bytes += (rsm->r_end - rsm->r_start); } idx = rsm->r_rtr_cnt - 1; rsm->r_tim_lastsent[idx] = ts; if (rsm->r_flags & RACK_ACKED) { /* Problably MTU discovery messing with us */ rsm->r_flags &= ~RACK_ACKED; rack->r_ctl.rc_sacked -= (rsm->r_end - rsm->r_start); } if (rsm->r_in_tmap) { TAILQ_REMOVE(&rack->r_ctl.rc_tmap, rsm, r_tnext); + rsm->r_in_tmap = 0; } TAILQ_INSERT_TAIL(&rack->r_ctl.rc_tmap, rsm, r_tnext); rsm->r_in_tmap = 1; if (rsm->r_flags & RACK_SACK_PASSED) { /* We have retransmitted due to the SACK pass */ rsm->r_flags &= ~RACK_SACK_PASSED; rsm->r_flags |= RACK_WAS_SACKPASS; } - /* Update memory for next rtr */ - rack->r_ctl.rc_next = TAILQ_NEXT(rsm, r_next); } static uint32_t rack_update_entry(struct tcpcb *tp, struct tcp_rack *rack, - struct rack_sendmap *rsm, uint32_t ts, int32_t * lenp) + struct rack_sendmap *rsm, uint32_t ts, int32_t *lenp) { /* * We (re-)transmitted starting at rsm->r_start for some length * (possibly less than r_end. */ - struct rack_sendmap *nrsm; + struct rack_sendmap *nrsm, *insret; uint32_t c_end; int32_t len; - int32_t idx; len = *lenp; c_end = rsm->r_start + len; if (SEQ_GEQ(c_end, rsm->r_end)) { /* * We retransmitted the whole piece or more than the whole * slopping into the next rsm. */ rack_update_rsm(tp, rack, rsm, ts); if (c_end == rsm->r_end) { *lenp = 0; return (0); } else { int32_t act_len; /* Hangs over the end return whats left */ act_len = rsm->r_end - rsm->r_start; *lenp = (len - act_len); return (rsm->r_end); } /* We don't get out of this block. */ } /* * Here we retransmitted less than the whole thing which means we * have to split this into what was transmitted and what was not. */ nrsm = rack_alloc_full_limit(rack); if (nrsm == NULL) { /* * We can't get memory, so lets not proceed. */ *lenp = 0; return (0); } /* * So here we are going to take the original rsm and make it what we * retransmitted. nrsm will be the tail portion we did not * retransmit. For example say the chunk was 1, 11 (10 bytes). And * we retransmitted 5 bytes i.e. 1, 5. The original piece shrinks to * 1, 6 and the new piece will be 6, 11. */ - nrsm->r_start = c_end; - nrsm->r_end = rsm->r_end; - nrsm->r_rtr_cnt = rsm->r_rtr_cnt; - nrsm->r_flags = rsm->r_flags; - nrsm->r_sndcnt = rsm->r_sndcnt; - nrsm->r_rtr_bytes = 0; - rsm->r_end = c_end; - for (idx = 0; idx < nrsm->r_rtr_cnt; idx++) { - nrsm->r_tim_lastsent[idx] = rsm->r_tim_lastsent[idx]; + rack_clone_rsm(rack, nrsm, rsm, c_end); + nrsm->r_dupack = 0; + rack_log_retran_reason(rack, nrsm, __LINE__, 0, 2); + insret = RB_INSERT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, nrsm); +#ifdef INVARIANTS + if (insret != NULL) { + panic("Insert in rb tree of %p fails ret:%p rack:%p rsm:%p", + nrsm, insret, rack, rsm); } - TAILQ_INSERT_AFTER(&rack->r_ctl.rc_map, rsm, nrsm, r_next); +#endif if (rsm->r_in_tmap) { TAILQ_INSERT_AFTER(&rack->r_ctl.rc_tmap, rsm, nrsm, r_tnext); nrsm->r_in_tmap = 1; } rsm->r_flags &= (~RACK_HAS_FIN); rack_update_rsm(tp, rack, rsm, ts); *lenp = 0; return (0); } static void rack_log_output(struct tcpcb *tp, struct tcpopt *to, int32_t len, uint32_t seq_out, uint8_t th_flags, int32_t err, uint32_t ts, uint8_t pass, struct rack_sendmap *hintrsm) { struct tcp_rack *rack; - struct rack_sendmap *rsm, *nrsm; + struct rack_sendmap *rsm, *nrsm, *insret, fe; register uint32_t snd_max, snd_una; - int32_t idx; /* * Add to the RACK log of packets in flight or retransmitted. If * there is a TS option we will use the TS echoed, if not we will * grab a TS. * * Retransmissions will increment the count and move the ts to its * proper place. Note that if options do not include TS's then we * won't be able to effectively use the ACK for an RTT on a retran. * * Notes about r_start and r_end. Lets consider a send starting at * sequence 1 for 10 bytes. In such an example the r_start would be * 1 (starting sequence) but the r_end would be r_start+len i.e. 11. * This means that r_end is actually the first sequence for the next * slot (11). * */ /* * If err is set what do we do XXXrrs? should we not add the thing? * -- i.e. return if err != 0 or should we pretend we sent it? -- * i.e. proceed with add ** do this for now. */ INP_WLOCK_ASSERT(tp->t_inpcb); if (err) /* * We don't log errors -- we could but snd_max does not * advance in this case either. */ return; if (th_flags & TH_RST) { /* * We don't log resets and we return immediately from * sending */ return; } rack = (struct tcp_rack *)tp->t_fb_ptr; snd_una = tp->snd_una; if (SEQ_LEQ((seq_out + len), snd_una)) { /* Are sending an old segment to induce an ack (keep-alive)? */ return; } if (SEQ_LT(seq_out, snd_una)) { /* huh? should we panic? */ uint32_t end; end = seq_out + len; seq_out = snd_una; - len = end - seq_out; + if (SEQ_GEQ(end, seq_out)) + len = end - seq_out; + else + len = 0; } snd_max = tp->snd_max; if (th_flags & (TH_SYN | TH_FIN)) { /* * The call to rack_log_output is made before bumping * snd_max. This means we can record one extra byte on a SYN * or FIN if seq_out is adding more on and a FIN is present * (and we are not resending). */ if (th_flags & TH_SYN) len++; if (th_flags & TH_FIN) len++; if (SEQ_LT(snd_max, tp->snd_nxt)) { /* * The add/update as not been done for the FIN/SYN * yet. */ snd_max = tp->snd_nxt; } } if (len == 0) { /* We don't log zero window probes */ return; } rack->r_ctl.rc_time_last_sent = ts; if (IN_RECOVERY(tp->t_flags)) { rack->r_ctl.rc_prr_out += len; } - /* First question is it a retransmission? */ + /* First question is it a retransmission or new? */ if (seq_out == snd_max) { + /* Its new */ again: rsm = rack_alloc(rack); if (rsm == NULL) { /* * Hmm out of memory and the tcb got destroyed while * we tried to wait. */ return; } if (th_flags & TH_FIN) { rsm->r_flags = RACK_HAS_FIN; } else { rsm->r_flags = 0; } rsm->r_tim_lastsent[0] = ts; rsm->r_rtr_cnt = 1; rsm->r_rtr_bytes = 0; - rsm->r_start = seq_out; - rsm->r_end = rsm->r_start + len; - rsm->r_sndcnt = 0; - TAILQ_INSERT_TAIL(&rack->r_ctl.rc_map, rsm, r_next); + if (th_flags & TH_SYN) { + /* The data space is one beyond snd_una */ + rsm->r_start = seq_out + 1; + rsm->r_end = rsm->r_start + (len - 1); + } else { + /* Normal case */ + rsm->r_start = seq_out; + rsm->r_end = rsm->r_start + len; + } + rsm->r_dupack = 0; + rack_log_retran_reason(rack, rsm, __LINE__, 0, 2); + insret = RB_INSERT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); +#ifdef INVARIANTS + if (insret != NULL) { + panic("Insert in rb tree of %p fails ret:%p rack:%p rsm:%p", + nrsm, insret, rack, rsm); + } +#endif TAILQ_INSERT_TAIL(&rack->r_ctl.rc_tmap, rsm, r_tnext); rsm->r_in_tmap = 1; return; } /* * If we reach here its a retransmission and we need to find it. */ + memset(&fe, 0, sizeof(fe)); more: if (hintrsm && (hintrsm->r_start == seq_out)) { rsm = hintrsm; hintrsm = NULL; - } else if (rack->r_ctl.rc_next) { - /* We have a hint from a previous run */ - rsm = rack->r_ctl.rc_next; } else { /* No hints sorry */ rsm = NULL; } if ((rsm) && (rsm->r_start == seq_out)) { - /* - * We used rc_next or hintrsm to retransmit, hopefully the - * likely case. - */ seq_out = rack_update_entry(tp, rack, rsm, ts, &len); if (len == 0) { return; } else { goto more; } } /* Ok it was not the last pointer go through it the hard way. */ - TAILQ_FOREACH(rsm, &rack->r_ctl.rc_map, r_next) { +refind: + fe.r_start = seq_out; + rsm = RB_FIND(rack_rb_tree_head, &rack->r_ctl.rc_mtree, &fe); + if (rsm) { if (rsm->r_start == seq_out) { seq_out = rack_update_entry(tp, rack, rsm, ts, &len); - rack->r_ctl.rc_next = TAILQ_NEXT(rsm, r_next); if (len == 0) { return; } else { - continue; + goto refind; } } if (SEQ_GEQ(seq_out, rsm->r_start) && SEQ_LT(seq_out, rsm->r_end)) { /* Transmitted within this piece */ /* * Ok we must split off the front and then let the * update do the rest */ nrsm = rack_alloc_full_limit(rack); if (nrsm == NULL) { rack_update_rsm(tp, rack, rsm, ts); return; } /* * copy rsm to nrsm and then trim the front of rsm * to not include this part. */ - nrsm->r_start = seq_out; - nrsm->r_end = rsm->r_end; - nrsm->r_rtr_cnt = rsm->r_rtr_cnt; - nrsm->r_flags = rsm->r_flags; - nrsm->r_sndcnt = rsm->r_sndcnt; - nrsm->r_rtr_bytes = 0; - for (idx = 0; idx < nrsm->r_rtr_cnt; idx++) { - nrsm->r_tim_lastsent[idx] = rsm->r_tim_lastsent[idx]; + rack_clone_rsm(rack, nrsm, rsm, seq_out); + insret = RB_INSERT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, nrsm); +#ifdef INVARIANTS + if (insret != NULL) { + panic("Insert in rb tree of %p fails ret:%p rack:%p rsm:%p", + nrsm, insret, rack, rsm); } - rsm->r_end = nrsm->r_start; - TAILQ_INSERT_AFTER(&rack->r_ctl.rc_map, rsm, nrsm, r_next); +#endif if (rsm->r_in_tmap) { TAILQ_INSERT_AFTER(&rack->r_ctl.rc_tmap, rsm, nrsm, r_tnext); nrsm->r_in_tmap = 1; } rsm->r_flags &= (~RACK_HAS_FIN); seq_out = rack_update_entry(tp, rack, nrsm, ts, &len); if (len == 0) { return; } } } /* * Hmm not found in map did they retransmit both old and on into the * new? */ if (seq_out == tp->snd_max) { goto again; } else if (SEQ_LT(seq_out, tp->snd_max)) { #ifdef INVARIANTS printf("seq_out:%u len:%d snd_una:%u snd_max:%u -- but rsm not found?\n", seq_out, len, tp->snd_una, tp->snd_max); printf("Starting Dump of all rack entries\n"); - TAILQ_FOREACH(rsm, &rack->r_ctl.rc_map, r_next) { + RB_FOREACH(rsm, rack_rb_tree_head, &rack->r_ctl.rc_mtree) { printf("rsm:%p start:%u end:%u\n", rsm, rsm->r_start, rsm->r_end); } printf("Dump complete\n"); panic("seq_out not found rack:%p tp:%p", rack, tp); #endif } else { #ifdef INVARIANTS /* * Hmm beyond sndmax? (only if we are using the new rtt-pack * flag) */ panic("seq_out:%u(%d) is beyond snd_max:%u tp:%p", seq_out, len, tp->snd_max, tp); #endif } } /* * Record one of the RTT updates from an ack into * our sample structure. */ static void tcp_rack_xmit_timer(struct tcp_rack *rack, int32_t rtt) { if ((rack->r_ctl.rack_rs.rs_flags & RACK_RTT_EMPTY) || (rack->r_ctl.rack_rs.rs_rtt_lowest > rtt)) { rack->r_ctl.rack_rs.rs_rtt_lowest = rtt; } if ((rack->r_ctl.rack_rs.rs_flags & RACK_RTT_EMPTY) || (rack->r_ctl.rack_rs.rs_rtt_highest < rtt)) { rack->r_ctl.rack_rs.rs_rtt_highest = rtt; } rack->r_ctl.rack_rs.rs_flags = RACK_RTT_VALID; rack->r_ctl.rack_rs.rs_rtt_tot += rtt; rack->r_ctl.rack_rs.rs_rtt_cnt++; } /* * Collect new round-trip time estimate * and update averages and current timeout. */ static void tcp_rack_xmit_timer_commit(struct tcp_rack *rack, struct tcpcb *tp) { int32_t delta; uint32_t o_srtt, o_var; int32_t rtt; if (rack->r_ctl.rack_rs.rs_flags & RACK_RTT_EMPTY) /* No valid sample */ return; if (rack->r_ctl.rc_rate_sample_method == USE_RTT_LOW) { /* We are to use the lowest RTT seen in a single ack */ rtt = rack->r_ctl.rack_rs.rs_rtt_lowest; } else if (rack->r_ctl.rc_rate_sample_method == USE_RTT_HIGH) { /* We are to use the highest RTT seen in a single ack */ rtt = rack->r_ctl.rack_rs.rs_rtt_highest; } else if (rack->r_ctl.rc_rate_sample_method == USE_RTT_AVG) { /* We are to use the average RTT seen in a single ack */ rtt = (int32_t)(rack->r_ctl.rack_rs.rs_rtt_tot / (uint64_t)rack->r_ctl.rack_rs.rs_rtt_cnt); } else { #ifdef INVARIANTS panic("Unknown rtt variant %d", rack->r_ctl.rc_rate_sample_method); #endif return; } if (rtt == 0) rtt = 1; rack_log_rtt_sample(rack, rtt); o_srtt = tp->t_srtt; o_var = tp->t_rttvar; rack = (struct tcp_rack *)tp->t_fb_ptr; if (tp->t_srtt != 0) { /* * srtt is stored as fixed point with 5 bits after the * binary point (i.e., scaled by 8). The following magic is * equivalent to the smoothing algorithm in rfc793 with an * alpha of .875 (srtt = rtt/8 + srtt*7/8 in fixed point). * Adjust rtt to origin 0. */ delta = ((rtt - 1) << TCP_DELTA_SHIFT) - (tp->t_srtt >> (TCP_RTT_SHIFT - TCP_DELTA_SHIFT)); tp->t_srtt += delta; if (tp->t_srtt <= 0) tp->t_srtt = 1; /* * We accumulate a smoothed rtt variance (actually, a * smoothed mean difference), then set the retransmit timer * to smoothed rtt + 4 times the smoothed variance. rttvar * is stored as fixed point with 4 bits after the binary * point (scaled by 16). The following is equivalent to * rfc793 smoothing with an alpha of .75 (rttvar = * rttvar*3/4 + |delta| / 4). This replaces rfc793's * wired-in beta. */ if (delta < 0) delta = -delta; delta -= tp->t_rttvar >> (TCP_RTTVAR_SHIFT - TCP_DELTA_SHIFT); tp->t_rttvar += delta; if (tp->t_rttvar <= 0) tp->t_rttvar = 1; if (tp->t_rttbest > tp->t_srtt + tp->t_rttvar) tp->t_rttbest = tp->t_srtt + tp->t_rttvar; } else { /* * No rtt measurement yet - use the unsmoothed rtt. Set the * variance to half the rtt (so our first retransmit happens * at 3*rtt). */ tp->t_srtt = rtt << TCP_RTT_SHIFT; tp->t_rttvar = rtt << (TCP_RTTVAR_SHIFT - 1); tp->t_rttbest = tp->t_srtt + tp->t_rttvar; } TCPSTAT_INC(tcps_rttupdated); rack_log_rtt_upd(tp, rack, rtt, o_srtt, o_var); tp->t_rttupdated++; #ifdef NETFLIX_STATS stats_voi_update_abs_u32(tp->t_stats, VOI_TCP_RTT, imax(0, rtt)); #endif tp->t_rxtshift = 0; /* * the retransmit should happen at rtt + 4 * rttvar. Because of the * way we do the smoothing, srtt and rttvar will each average +1/2 * tick of bias. When we compute the retransmit timer, we want 1/2 * tick of rounding and 1 extra tick because of +-1/2 tick * uncertainty in the firing of the timer. The bias will give us * exactly the 1.5 tick we need. But, because the bias is * statistical, we have to test that we don't drop below the minimum * feasible timer (which is 2 ticks). */ TCPT_RANGESET(tp->t_rxtcur, TCP_REXMTVAL(tp), max(MSEC_2_TICKS(rack_rto_min), rtt + 2), MSEC_2_TICKS(rack_rto_max)); tp->t_softerror = 0; } static void rack_earlier_retran(struct tcpcb *tp, struct rack_sendmap *rsm, uint32_t t, uint32_t cts) { /* * For this RSM, we acknowledged the data from a previous * transmission, not the last one we made. This means we did a false * retransmit. */ struct tcp_rack *rack; if (rsm->r_flags & RACK_HAS_FIN) { /* * The sending of the FIN often is multiple sent when we * have everything outstanding ack'd. We ignore this case * since its over now. */ return; } if (rsm->r_flags & RACK_TLP) { /* * We expect TLP's to have this occur. */ return; } rack = (struct tcp_rack *)tp->t_fb_ptr; /* should we undo cc changes and exit recovery? */ if (IN_RECOVERY(tp->t_flags)) { if (rack->r_ctl.rc_rsm_start == rsm->r_start) { /* * Undo what we ratched down and exit recovery if * possible */ EXIT_RECOVERY(tp->t_flags); tp->snd_recover = tp->snd_una; if (rack->r_ctl.rc_cwnd_at > tp->snd_cwnd) tp->snd_cwnd = rack->r_ctl.rc_cwnd_at; if (rack->r_ctl.rc_ssthresh_at > tp->snd_ssthresh) tp->snd_ssthresh = rack->r_ctl.rc_ssthresh_at; } } if (rsm->r_flags & RACK_WAS_SACKPASS) { /* * We retransmitted based on a sack and the earlier * retransmission ack'd it - re-ordering is occuring. */ counter_u64_add(rack_reorder_seen, 1); rack->r_ctl.rc_reorder_ts = cts; } counter_u64_add(rack_badfr, 1); counter_u64_add(rack_badfr_bytes, (rsm->r_end - rsm->r_start)); } static int rack_update_rtt(struct tcpcb *tp, struct tcp_rack *rack, struct rack_sendmap *rsm, struct tcpopt *to, uint32_t cts, int32_t ack_type) { int32_t i; uint32_t t; if (rsm->r_flags & RACK_ACKED) /* Already done */ return (0); if ((rsm->r_rtr_cnt == 1) || ((ack_type == CUM_ACKED) && (to->to_flags & TOF_TS) && (to->to_tsecr) && (rsm->r_tim_lastsent[rsm->r_rtr_cnt - 1] == to->to_tsecr)) ) { /* * We will only find a matching timestamp if its cum-acked. * But if its only one retransmission its for-sure matching * :-) */ t = cts - rsm->r_tim_lastsent[(rsm->r_rtr_cnt - 1)]; if ((int)t <= 0) t = 1; if (!tp->t_rttlow || tp->t_rttlow > t) tp->t_rttlow = t; if (!rack->r_ctl.rc_rack_min_rtt || SEQ_LT(t, rack->r_ctl.rc_rack_min_rtt)) { rack->r_ctl.rc_rack_min_rtt = t; if (rack->r_ctl.rc_rack_min_rtt == 0) { rack->r_ctl.rc_rack_min_rtt = 1; } } - tcp_rack_xmit_timer(rack, TCP_TS_TO_TICKS(t) + 1); + tcp_rack_xmit_timer(rack, t + 1); if ((rsm->r_flags & RACK_TLP) && (!IN_RECOVERY(tp->t_flags))) { /* Segment was a TLP and our retrans matched */ if (rack->r_ctl.rc_tlp_cwnd_reduce) { rack->r_ctl.rc_rsm_start = tp->snd_max; rack->r_ctl.rc_cwnd_at = tp->snd_cwnd; rack->r_ctl.rc_ssthresh_at = tp->snd_ssthresh; rack_cong_signal(tp, NULL, CC_NDUPACK); /* * When we enter recovery we need to assure * we send one packet. */ - rack->r_ctl.rc_prr_sndcnt = tp->t_maxseg; - } else - rack->r_ctl.rc_tlp_rtx_out = 0; + rack->r_ctl.rc_prr_sndcnt = ctf_fixed_maxseg(tp); + rack_log_to_prr(rack, 7); + } } if (SEQ_LT(rack->r_ctl.rc_rack_tmit_time, rsm->r_tim_lastsent[(rsm->r_rtr_cnt - 1)])) { /* New more recent rack_tmit_time */ rack->r_ctl.rc_rack_tmit_time = rsm->r_tim_lastsent[(rsm->r_rtr_cnt - 1)]; rack->rc_rack_rtt = t; } return (1); } /* * We clear the soft/rxtshift since we got an ack. * There is no assurance we will call the commit() function * so we need to clear these to avoid incorrect handling. */ tp->t_rxtshift = 0; tp->t_softerror = 0; if ((to->to_flags & TOF_TS) && (ack_type == CUM_ACKED) && (to->to_tsecr) && - ((rsm->r_flags & (RACK_DEFERRED | RACK_OVERMAX)) == 0)) { + ((rsm->r_flags & RACK_OVERMAX) == 0)) { /* * Now which timestamp does it match? In this block the ACK * must be coming from a previous transmission. */ for (i = 0; i < rsm->r_rtr_cnt; i++) { if (rsm->r_tim_lastsent[i] == to->to_tsecr) { t = cts - rsm->r_tim_lastsent[i]; if ((int)t <= 0) t = 1; if ((i + 1) < rsm->r_rtr_cnt) { /* Likely */ rack_earlier_retran(tp, rsm, t, cts); } if (!tp->t_rttlow || tp->t_rttlow > t) tp->t_rttlow = t; if (!rack->r_ctl.rc_rack_min_rtt || SEQ_LT(t, rack->r_ctl.rc_rack_min_rtt)) { rack->r_ctl.rc_rack_min_rtt = t; if (rack->r_ctl.rc_rack_min_rtt == 0) { rack->r_ctl.rc_rack_min_rtt = 1; } } /* * Note the following calls to * tcp_rack_xmit_timer() are being commented * out for now. They give us no more accuracy * and often lead to a wrong choice. We have * enough samples that have not been * retransmitted. I leave the commented out * code in here in case in the future we * decide to add it back (though I can't forsee * doing that). That way we will easily see * where they need to be placed. */ if (SEQ_LT(rack->r_ctl.rc_rack_tmit_time, rsm->r_tim_lastsent[(rsm->r_rtr_cnt - 1)])) { /* New more recent rack_tmit_time */ rack->r_ctl.rc_rack_tmit_time = rsm->r_tim_lastsent[(rsm->r_rtr_cnt - 1)]; rack->rc_rack_rtt = t; } return (1); } } goto ts_not_found; } else { /* * Ok its a SACK block that we retransmitted. or a windows * machine without timestamps. We can tell nothing from the * time-stamp since its not there or the time the peer last * recieved a segment that moved forward its cum-ack point. */ ts_not_found: i = rsm->r_rtr_cnt - 1; t = cts - rsm->r_tim_lastsent[i]; if ((int)t <= 0) t = 1; if (rack->r_ctl.rc_rack_min_rtt && SEQ_LT(t, rack->r_ctl.rc_rack_min_rtt)) { /* * We retransmitted and the ack came back in less * than the smallest rtt we have observed. We most * likey did an improper retransmit as outlined in * 4.2 Step 3 point 2 in the rack-draft. */ i = rsm->r_rtr_cnt - 2; t = cts - rsm->r_tim_lastsent[i]; rack_earlier_retran(tp, rsm, t, cts); } else if (rack->r_ctl.rc_rack_min_rtt) { /* * We retransmitted it and the retransmit did the * job. */ if (!rack->r_ctl.rc_rack_min_rtt || SEQ_LT(t, rack->r_ctl.rc_rack_min_rtt)) { rack->r_ctl.rc_rack_min_rtt = t; if (rack->r_ctl.rc_rack_min_rtt == 0) { rack->r_ctl.rc_rack_min_rtt = 1; } } if (SEQ_LT(rack->r_ctl.rc_rack_tmit_time, rsm->r_tim_lastsent[i])) { /* New more recent rack_tmit_time */ rack->r_ctl.rc_rack_tmit_time = rsm->r_tim_lastsent[i]; rack->rc_rack_rtt = t; } return (1); } } return (0); } /* * Mark the SACK_PASSED flag on all entries prior to rsm send wise. */ static void rack_log_sack_passed(struct tcpcb *tp, struct tcp_rack *rack, struct rack_sendmap *rsm) { struct rack_sendmap *nrsm; - uint32_t ts; - int32_t idx; - idx = rsm->r_rtr_cnt - 1; - ts = rsm->r_tim_lastsent[idx]; nrsm = rsm; TAILQ_FOREACH_REVERSE_FROM(nrsm, &rack->r_ctl.rc_tmap, rack_head, r_tnext) { if (nrsm == rsm) { /* Skip orginal segment he is acked */ continue; } if (nrsm->r_flags & RACK_ACKED) { - /* Skip ack'd segments */ + /* + * Skip ack'd segments, though we + * should not see these, since tmap + * should not have ack'd segments. + */ continue; } if (nrsm->r_flags & RACK_SACK_PASSED) { /* * We found one that is already marked * passed, we have been here before and * so all others below this are marked. */ break; } - idx = nrsm->r_rtr_cnt - 1; - if (ts == nrsm->r_tim_lastsent[idx]) { - /* - * For this case lets use seq no, if we sent in a - * big block (TSO) we would have a bunch of segments - * sent at the same time. - * - * We would only get a report if its SEQ is earlier. - * If we have done multiple retransmits the times - * would not be equal. - */ - if (SEQ_LT(nrsm->r_start, rsm->r_start)) { - nrsm->r_flags |= RACK_SACK_PASSED; - nrsm->r_flags &= ~RACK_WAS_SACKPASS; - } - } else { - /* - * Here they were sent at different times, not a big - * block. Since we transmitted this one later and - * see it sack'd then this must also be missing (or - * we would have gotten a sack block for it) - */ - nrsm->r_flags |= RACK_SACK_PASSED; - nrsm->r_flags &= ~RACK_WAS_SACKPASS; - } + nrsm->r_flags |= RACK_SACK_PASSED; + nrsm->r_flags &= ~RACK_WAS_SACKPASS; } } static uint32_t rack_proc_sack_blk(struct tcpcb *tp, struct tcp_rack *rack, struct sackblk *sack, - struct tcpopt *to, struct rack_sendmap **prsm, uint32_t cts) + struct tcpopt *to, struct rack_sendmap **prsm, uint32_t cts, int *moved_two) { - int32_t idx; - int32_t times = 0; uint32_t start, end, changed = 0; - struct rack_sendmap *rsm, *nrsm; + struct rack_sendmap stack_map; + struct rack_sendmap *rsm, *nrsm, fe, *insret, *prev, *next; int32_t used_ref = 1; + int moved = 0; start = sack->start; end = sack->end; rsm = *prsm; - if (rsm && SEQ_LT(start, rsm->r_start)) { - TAILQ_FOREACH_REVERSE_FROM(rsm, &rack->r_ctl.rc_map, rack_head, r_next) { - if (SEQ_GEQ(start, rsm->r_start) && - SEQ_LT(start, rsm->r_end)) { - goto do_rest_ofb; - } - } - } - if (rsm == NULL) { -start_at_beginning: - rsm = NULL; + memset(&fe, 0, sizeof(fe)); +do_rest_ofb: + if ((rsm == NULL) || + (SEQ_LT(end, rsm->r_start)) || + (SEQ_GEQ(start, rsm->r_end)) || + (SEQ_LT(start, rsm->r_start))) { + /* + * We are not in the right spot, + * find the correct spot in the tree. + */ used_ref = 0; + fe.r_start = start; + rsm = RB_FIND(rack_rb_tree_head, &rack->r_ctl.rc_mtree, &fe); + moved++; } - /* First lets locate the block where this guy is */ - TAILQ_FOREACH_FROM(rsm, &rack->r_ctl.rc_map, r_next) { - if (SEQ_GEQ(start, rsm->r_start) && - SEQ_LT(start, rsm->r_end)) { - break; - } - } -do_rest_ofb: if (rsm == NULL) { - /* - * This happens when we get duplicate sack blocks with the - * same end. For example SACK 4: 100 SACK 3: 100 The sort - * will not change there location so we would just start at - * the end of the first one and get lost. - */ - if (tp->t_flags & TF_SENTFIN) { - /* - * Check to see if we have not logged the FIN that - * went out. + /* TSNH */ + goto out; + } + /* Ok we have an ACK for some piece of this rsm */ + if (rsm->r_start != start) { + if ((rsm->r_flags & RACK_ACKED) == 0) { + /** + * Need to split this in two pieces the before and after, + * the before remains in the map, the after must be + * added. In other words we have: + * rsm |--------------| + * sackblk |-------> + * rsm will become + * rsm |---| + * and nrsm will be the sacked piece + * nrsm |----------| + * + * But before we start down that path lets + * see if the sack spans over on top of + * the next guy and it is already sacked. */ - nrsm = TAILQ_LAST_FAST(&rack->r_ctl.rc_map, rack_sendmap, r_next); - if (nrsm && (nrsm->r_end + 1) == tp->snd_max) { - /* - * Ok we did not get the FIN logged. + next = RB_NEXT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); + if (next && (next->r_flags & RACK_ACKED) && + SEQ_GEQ(end, next->r_start)) { + /** + * So the next one is already acked, and + * we can thus by hookery use our stack_map + * to reflect the piece being sacked and + * then adjust the two tree entries moving + * the start and ends around. So we start like: + * rsm |------------| (not-acked) + * next |-----------| (acked) + * sackblk |--------> + * We want to end like so: + * rsm |------| (not-acked) + * next |-----------------| (acked) + * nrsm |-----| + * Where nrsm is a temporary stack piece we + * use to update all the gizmos. */ - nrsm->r_end++; + /* Copy up our fudge block */ + nrsm = &stack_map; + memcpy(nrsm, rsm, sizeof(struct rack_sendmap)); + /* Now adjust our tree blocks */ + rsm->r_end = start; + next->r_start = start; + /* Clear out the dup ack count of the remainder */ + rsm->r_dupack = 0; + rack_log_retran_reason(rack, rsm, __LINE__, 0, 2); + /* Now lets make sure our fudge block is right */ + nrsm->r_start = start; + /* Now lets update all the stats and such */ + rack_update_rtt(tp, rack, nrsm, to, cts, SACKED); + changed += (nrsm->r_end - nrsm->r_start); + rack->r_ctl.rc_sacked += (nrsm->r_end - nrsm->r_start); + if (nrsm->r_flags & RACK_SACK_PASSED) { + counter_u64_add(rack_reorder_seen, 1); + rack->r_ctl.rc_reorder_ts = cts; + } + /* + * Now we want to go up from rsm (the + * one left un-acked) to the next one + * in the tmap. We do this so when + * we walk backwards we include marking + * sack-passed on rsm (The one passed in + * is skipped since it is generally called + * on something sacked before removing it + * from the tmap). + */ + if (rsm->r_in_tmap) { + nrsm = TAILQ_NEXT(rsm, r_tnext); + /* + * Now that we have the next + * one walk backwards from there. + */ + if (nrsm && nrsm->r_in_tmap) + rack_log_sack_passed(tp, rack, nrsm); + } + /* Now are we done? */ + if (SEQ_LT(end, next->r_end) || + (end == next->r_end)) { + /* Done with block */ + goto out; + } + counter_u64_add(rack_sack_used_next_merge, 1); + /* Postion for the next block */ + start = next->r_end; + rsm = RB_NEXT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, next); + if (rsm == NULL) + goto out; + } else { + /** + * We can't use any hookery here, so we + * need to split the map. We enter like + * so: + * rsm |--------| + * sackblk |-----> + * We will add the new block nrsm and + * that will be the new portion, and then + * fall through after reseting rsm. So we + * split and look like this: + * rsm |----| + * sackblk |-----> + * nrsm |---| + * We then fall through reseting + * rsm to nrsm, so the next block + * picks it up. + */ + nrsm = rack_alloc_limit(rack, RACK_LIMIT_TYPE_SPLIT); + if (nrsm == NULL) { + /* + * failed XXXrrs what can we do but loose the sack + * info? + */ + goto out; + } + counter_u64_add(rack_sack_splits, 1); + rack_clone_rsm(rack, nrsm, rsm, start); + insret = RB_INSERT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, nrsm); +#ifdef INVARIANTS + if (insret != NULL) { + panic("Insert in rb tree of %p fails ret:%p rack:%p rsm:%p", + nrsm, insret, rack, rsm); + } +#endif + if (rsm->r_in_tmap) { + TAILQ_INSERT_AFTER(&rack->r_ctl.rc_tmap, rsm, nrsm, r_tnext); + nrsm->r_in_tmap = 1; + } + rsm->r_flags &= (~RACK_HAS_FIN); + /* Position us to point to the new nrsm that starts the sack blk */ rsm = nrsm; - goto do_rest_ofb; } + } else { + /* Already sacked this piece */ + counter_u64_add(rack_sack_skipped_acked, 1); + moved++; + if (end == rsm->r_end) { + /* Done with block */ + rsm = RB_NEXT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); + goto out; + } else if (SEQ_LT(end, rsm->r_end)) { + /* A partial sack to a already sacked block */ + moved++; + rsm = RB_NEXT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); + goto out; + } else { + /* + * The end goes beyond this guy + * repostion the start to the + * next block. + */ + start = rsm->r_end; + rsm = RB_NEXT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); + if (rsm == NULL) + goto out; + } } - if (times == 1) { -#ifdef INVARIANTS - panic("tp:%p rack:%p sack:%p to:%p prsm:%p", - tp, rack, sack, to, prsm); -#else - goto out; -#endif - } - times++; - counter_u64_add(rack_sack_proc_restart, 1); - goto start_at_beginning; } - /* Ok we have an ACK for some piece of rsm */ - if (rsm->r_start != start) { - /* - * Need to split this in two pieces the before and after. - */ - nrsm = rack_alloc_limit(rack, RACK_LIMIT_TYPE_SPLIT); - if (nrsm == NULL) { - /* - * failed XXXrrs what can we do but loose the sack - * info? - */ - goto out; - } - nrsm->r_start = start; - nrsm->r_rtr_bytes = 0; - nrsm->r_end = rsm->r_end; - nrsm->r_rtr_cnt = rsm->r_rtr_cnt; - nrsm->r_flags = rsm->r_flags; - nrsm->r_sndcnt = rsm->r_sndcnt; - for (idx = 0; idx < nrsm->r_rtr_cnt; idx++) { - nrsm->r_tim_lastsent[idx] = rsm->r_tim_lastsent[idx]; - } - rsm->r_end = nrsm->r_start; - TAILQ_INSERT_AFTER(&rack->r_ctl.rc_map, rsm, nrsm, r_next); - if (rsm->r_in_tmap) { - TAILQ_INSERT_AFTER(&rack->r_ctl.rc_tmap, rsm, nrsm, r_tnext); - nrsm->r_in_tmap = 1; - } - rsm->r_flags &= (~RACK_HAS_FIN); - rsm = nrsm; - } if (SEQ_GEQ(end, rsm->r_end)) { - /* + /** * The end of this block is either beyond this guy or right - * at this guy. + * at this guy. I.e.: + * rsm --- |-----| + * end |-----| + * + * end |---------| */ - + if (rsm->r_flags & RACK_TLP) + rack->r_ctl.rc_tlp_rtx_out = 0; if ((rsm->r_flags & RACK_ACKED) == 0) { rack_update_rtt(tp, rack, rsm, to, cts, SACKED); changed += (rsm->r_end - rsm->r_start); rack->r_ctl.rc_sacked += (rsm->r_end - rsm->r_start); - rack_log_sack_passed(tp, rack, rsm); + if (rsm->r_in_tmap) /* should be true */ + rack_log_sack_passed(tp, rack, rsm); /* Is Reordering occuring? */ if (rsm->r_flags & RACK_SACK_PASSED) { + rsm->r_flags &= ~RACK_SACK_PASSED; counter_u64_add(rack_reorder_seen, 1); rack->r_ctl.rc_reorder_ts = cts; } rsm->r_flags |= RACK_ACKED; rsm->r_flags &= ~RACK_TLP; if (rsm->r_in_tmap) { TAILQ_REMOVE(&rack->r_ctl.rc_tmap, rsm, r_tnext); rsm->r_in_tmap = 0; } + } else { + counter_u64_add(rack_sack_skipped_acked, 1); + moved++; } if (end == rsm->r_end) { - /* This block only - done */ + /* This block only - done, setup for next */ goto out; } - /* There is more not coverend by this rsm move on */ + /* + * There is more not coverend by this rsm move on + * to the next block in the RB tree. + */ + nrsm = RB_NEXT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); start = rsm->r_end; - nrsm = TAILQ_NEXT(rsm, r_next); rsm = nrsm; - times = 0; + if (rsm == NULL) + goto out; goto do_rest_ofb; } - /* Ok we need to split off this one at the tail */ - nrsm = rack_alloc_limit(rack, RACK_LIMIT_TYPE_SPLIT); - if (nrsm == NULL) { - /* failed rrs what can we do but loose the sack info? */ - goto out; + /** + * The end of this sack block is smaller than + * our rsm i.e.: + * rsm --- |-----| + * end |--| + */ + if ((rsm->r_flags & RACK_ACKED) == 0) { + prev = RB_PREV(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); + if (prev && (prev->r_flags & RACK_ACKED)) { + /** + * Goal, we want the right remainder of rsm to shrink + * in place and span from (rsm->r_start = end) to rsm->r_end. + * We want to expand prev to go all the way + * to prev->r_end <- end. + * so in the tree we have before: + * prev |--------| (acked) + * rsm |-------| (non-acked) + * sackblk |-| + * We churn it so we end up with + * prev |----------| (acked) + * rsm |-----| (non-acked) + * nrsm |-| (temporary) + */ + nrsm = &stack_map; + memcpy(nrsm, rsm, sizeof(struct rack_sendmap)); + prev->r_end = end; + rsm->r_start = end; + /* Now adjust nrsm (stack copy) to be + * the one that is the small + * piece that was "sacked". + */ + nrsm->r_end = end; + rsm->r_dupack = 0; + rack_log_retran_reason(rack, rsm, __LINE__, 0, 2); + /* + * Now nrsm is our new little piece + * that is acked (which was merged + * to prev). Update the rtt and changed + * based on that. Also check for reordering. + */ + rack_update_rtt(tp, rack, nrsm, to, cts, SACKED); + changed += (nrsm->r_end - nrsm->r_start); + rack->r_ctl.rc_sacked += (nrsm->r_end - nrsm->r_start); + if (nrsm->r_flags & RACK_SACK_PASSED) { + counter_u64_add(rack_reorder_seen, 1); + rack->r_ctl.rc_reorder_ts = cts; + } + rsm = prev; + counter_u64_add(rack_sack_used_prev_merge, 1); + } else { + /** + * This is the case where our previous + * block is not acked either, so we must + * split the block in two. + */ + nrsm = rack_alloc_limit(rack, RACK_LIMIT_TYPE_SPLIT); + if (nrsm == NULL) { + /* failed rrs what can we do but loose the sack info? */ + goto out; + } + /** + * In this case nrsm becomes + * nrsm->r_start = end; + * nrsm->r_end = rsm->r_end; + * which is un-acked. + * + * rsm->r_end = nrsm->r_start; + * i.e. the remaining un-acked + * piece is left on the left + * hand side. + * + * So we start like this + * rsm |----------| (not acked) + * sackblk |---| + * build it so we have + * rsm |---| (acked) + * nrsm |------| (not acked) + */ + counter_u64_add(rack_sack_splits, 1); + rack_clone_rsm(rack, nrsm, rsm, end); + rsm->r_flags &= (~RACK_HAS_FIN); + insret = RB_INSERT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, nrsm); +#ifdef INVARIANTS + if (insret != NULL) { + panic("Insert in rb tree of %p fails ret:%p rack:%p rsm:%p", + nrsm, insret, rack, rsm); + } +#endif + if (rsm->r_in_tmap) { + TAILQ_INSERT_AFTER(&rack->r_ctl.rc_tmap, rsm, nrsm, r_tnext); + nrsm->r_in_tmap = 1; + } + nrsm->r_dupack = 0; + rack_log_retran_reason(rack, nrsm, __LINE__, 0, 2); + if (rsm->r_flags & RACK_TLP) + rack->r_ctl.rc_tlp_rtx_out = 0; + rack_update_rtt(tp, rack, rsm, to, cts, SACKED); + changed += (rsm->r_end - rsm->r_start); + rack->r_ctl.rc_sacked += (rsm->r_end - rsm->r_start); + if (rsm->r_in_tmap) /* should be true */ + rack_log_sack_passed(tp, rack, rsm); + /* Is Reordering occuring? */ + if (rsm->r_flags & RACK_SACK_PASSED) { + rsm->r_flags &= ~RACK_SACK_PASSED; + counter_u64_add(rack_reorder_seen, 1); + rack->r_ctl.rc_reorder_ts = cts; + } + rsm->r_flags |= RACK_ACKED; + rsm->r_flags &= ~RACK_TLP; + if (rsm->r_in_tmap) { + TAILQ_REMOVE(&rack->r_ctl.rc_tmap, rsm, r_tnext); + rsm->r_in_tmap = 0; + } + } + } else if (start != end){ + /* + * The block was already acked. + */ + counter_u64_add(rack_sack_skipped_acked, 1); + moved++; } - /* Clone it */ - nrsm->r_start = end; - nrsm->r_end = rsm->r_end; - nrsm->r_rtr_bytes = 0; - nrsm->r_rtr_cnt = rsm->r_rtr_cnt; - nrsm->r_flags = rsm->r_flags; - nrsm->r_sndcnt = rsm->r_sndcnt; - for (idx = 0; idx < nrsm->r_rtr_cnt; idx++) { - nrsm->r_tim_lastsent[idx] = rsm->r_tim_lastsent[idx]; - } - /* The sack block does not cover this guy fully */ - rsm->r_flags &= (~RACK_HAS_FIN); - rsm->r_end = end; - TAILQ_INSERT_AFTER(&rack->r_ctl.rc_map, rsm, nrsm, r_next); - if (rsm->r_in_tmap) { - TAILQ_INSERT_AFTER(&rack->r_ctl.rc_tmap, rsm, nrsm, r_tnext); - nrsm->r_in_tmap = 1; - } - if (rsm->r_flags & RACK_ACKED) { - /* Been here done that */ - goto out; - } - rack_update_rtt(tp, rack, rsm, to, cts, SACKED); - changed += (rsm->r_end - rsm->r_start); - rack->r_ctl.rc_sacked += (rsm->r_end - rsm->r_start); - rack_log_sack_passed(tp, rack, rsm); - /* Is Reordering occuring? */ - if (rsm->r_flags & RACK_SACK_PASSED) { - counter_u64_add(rack_reorder_seen, 1); - rack->r_ctl.rc_reorder_ts = cts; - } - rsm->r_flags |= RACK_ACKED; - rsm->r_flags &= ~RACK_TLP; - if (rsm->r_in_tmap) { - TAILQ_REMOVE(&rack->r_ctl.rc_tmap, rsm, r_tnext); - rsm->r_in_tmap = 0; - } out: if (rsm && (rsm->r_flags & RACK_ACKED)) { /* - * Now can we merge this newly acked - * block with either the previous or + * Now can we merge where we worked + * with either the previous or * next block? */ - nrsm = TAILQ_NEXT(rsm, r_next); - if (nrsm && - (nrsm->r_flags & RACK_ACKED)) { + next = RB_NEXT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); + while (next) { + if (next->r_flags & RACK_ACKED) { /* yep this and next can be merged */ - rsm = rack_merge_rsm(rack, rsm, nrsm); + rsm = rack_merge_rsm(rack, rsm, next); + next = RB_NEXT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); + } else + break; } /* Now what about the previous? */ - nrsm = TAILQ_PREV(rsm, rack_head, r_next); - if (nrsm && - (nrsm->r_flags & RACK_ACKED)) { + prev = RB_PREV(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); + while (prev) { + if (prev->r_flags & RACK_ACKED) { /* yep the previous and this can be merged */ - rsm = rack_merge_rsm(rack, nrsm, rsm); + rsm = rack_merge_rsm(rack, prev, rsm); + prev = RB_PREV(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); + } else + break; } } if (used_ref == 0) { counter_u64_add(rack_sack_proc_all, 1); } else { counter_u64_add(rack_sack_proc_short, 1); } - /* Save off where we last were */ - if (rsm) - rack->r_ctl.rc_sacklast = TAILQ_NEXT(rsm, r_next); + /* Save off the next one for quick reference. */ + if (rsm) + nrsm = RB_NEXT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); else - rack->r_ctl.rc_sacklast = NULL; - *prsm = rsm; + nrsm = NULL; + *prsm = rack->r_ctl.rc_sacklast = nrsm; + /* Pass back the moved. */ + *moved_two = moved; return (changed); } static void inline rack_peer_reneges(struct tcp_rack *rack, struct rack_sendmap *rsm, tcp_seq th_ack) { struct rack_sendmap *tmap; tmap = NULL; while (rsm && (rsm->r_flags & RACK_ACKED)) { /* Its no longer sacked, mark it so */ rack->r_ctl.rc_sacked -= (rsm->r_end - rsm->r_start); #ifdef INVARIANTS if (rsm->r_in_tmap) { panic("rack:%p rsm:%p flags:0x%x in tmap?", rack, rsm, rsm->r_flags); } #endif rsm->r_flags &= ~(RACK_ACKED|RACK_SACK_PASSED|RACK_WAS_SACKPASS); /* Rebuild it into our tmap */ if (tmap == NULL) { TAILQ_INSERT_HEAD(&rack->r_ctl.rc_tmap, rsm, r_tnext); tmap = rsm; } else { TAILQ_INSERT_AFTER(&rack->r_ctl.rc_tmap, tmap, rsm, r_tnext); tmap = rsm; } tmap->r_in_tmap = 1; - rsm = TAILQ_NEXT(rsm, r_next); + rsm = RB_NEXT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); } /* * Now lets possibly clear the sack filter so we start * recognizing sacks that cover this area. */ if (rack_use_sack_filter) sack_filter_clear(&rack->r_ctl.rack_sf, th_ack); } static void +rack_do_decay(struct tcp_rack *rack) +{ + struct timeval res; + +#define timersub(tvp, uvp, vvp) \ + do { \ + (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ + (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ + if ((vvp)->tv_usec < 0) { \ + (vvp)->tv_sec--; \ + (vvp)->tv_usec += 1000000; \ + } \ + } while (0) + + timersub(&rack->r_ctl.rc_last_ack, &rack->r_ctl.rc_last_time_decay, &res); +#undef timersub + + rack->r_ctl.input_pkt++; + if ((rack->rc_in_persist) || + (res.tv_sec >= 1) || + (rack->rc_tp->snd_max == rack->rc_tp->snd_una)) { + /* + * Check for decay of non-SAD, + * we want all SAD detection metrics to + * decay 1/4 per second (or more) passed. + */ + uint32_t pkt_delta; + + pkt_delta = rack->r_ctl.input_pkt - rack->r_ctl.saved_input_pkt; + /* Update our saved tracking values */ + rack->r_ctl.saved_input_pkt = rack->r_ctl.input_pkt; + rack->r_ctl.rc_last_time_decay = rack->r_ctl.rc_last_ack; + /* Now do we escape without decay? */ + if (rack->rc_in_persist || + (rack->rc_tp->snd_max == rack->rc_tp->snd_una) || + (pkt_delta < tcp_sad_low_pps)){ + /* + * We don't decay idle connections + * or ones that have a low input pps. + */ + return; + } + /* Decay the counters */ + rack->r_ctl.ack_count = ctf_decay_count(rack->r_ctl.ack_count, + tcp_sad_decay_val); + rack->r_ctl.sack_count = ctf_decay_count(rack->r_ctl.sack_count, + tcp_sad_decay_val); + rack->r_ctl.sack_moved_extra = ctf_decay_count(rack->r_ctl.sack_moved_extra, + tcp_sad_decay_val); + rack->r_ctl.sack_noextra_move = ctf_decay_count(rack->r_ctl.sack_noextra_move, + tcp_sad_decay_val); + } +} + +static void rack_log_ack(struct tcpcb *tp, struct tcpopt *to, struct tcphdr *th) { - uint32_t changed, last_seq, entered_recovery = 0; + uint32_t changed, entered_recovery = 0; struct tcp_rack *rack; - struct rack_sendmap *rsm; + struct rack_sendmap *rsm, *rm; struct sackblk sack, sack_blocks[TCP_MAX_SACK + 1]; register uint32_t th_ack; int32_t i, j, k, num_sack_blks = 0; uint32_t cts, acked, ack_point, sack_changed = 0; - + int loop_start = 0, moved_two = 0; + INP_WLOCK_ASSERT(tp->t_inpcb); if (th->th_flags & TH_RST) { /* We don't log resets */ return; } rack = (struct tcp_rack *)tp->t_fb_ptr; cts = tcp_ts_getticks(); - rsm = TAILQ_FIRST(&rack->r_ctl.rc_map); + rsm = RB_MIN(rack_rb_tree_head, &rack->r_ctl.rc_mtree); changed = 0; th_ack = th->th_ack; + if (rack->sack_attack_disable == 0) + rack_do_decay(rack); + if (BYTES_THIS_ACK(tp, th) >= ctf_fixed_maxseg(rack->rc_tp)) { + /* + * You only get credit for + * MSS and greater (and you get extra + * credit for larger cum-ack moves). + */ + int ac; + ac = BYTES_THIS_ACK(tp, th) / ctf_fixed_maxseg(rack->rc_tp); + rack->r_ctl.ack_count += ac; + counter_u64_add(rack_ack_total, ac); + } + if (rack->r_ctl.ack_count > 0xfff00000) { + /* + * reduce the number to keep us under + * a uint32_t. + */ + rack->r_ctl.ack_count /= 2; + rack->r_ctl.sack_count /= 2; + } if (SEQ_GT(th_ack, tp->snd_una)) { rack_log_progress_event(rack, tp, ticks, PROGRESS_UPDATE, __LINE__); tp->t_acktime = ticks; } if (rsm && SEQ_GT(th_ack, rsm->r_start)) changed = th_ack - rsm->r_start; if (changed) { /* * The ACK point is advancing to th_ack, we must drop off * the packets in the rack log and calculate any eligble * RTT's. */ rack->r_wanted_output++; -more: - rsm = TAILQ_FIRST(&rack->r_ctl.rc_map); + more: + rsm = RB_MIN(rack_rb_tree_head, &rack->r_ctl.rc_mtree); if (rsm == NULL) { if ((th_ack - 1) == tp->iss) { /* * For the SYN incoming case we will not * have called tcp_output for the sending of * the SYN, so there will be no map. All * other cases should probably be a panic. */ goto proc_sack; } if (tp->t_flags & TF_SENTFIN) { /* if we send a FIN we will not hav a map */ goto proc_sack; } #ifdef INVARIANTS panic("No rack map tp:%p for th:%p state:%d rack:%p snd_una:%u snd_max:%u snd_nxt:%u chg:%d\n", - tp, - th, tp->t_state, rack, - tp->snd_una, tp->snd_max, tp->snd_nxt, changed); + tp, + th, tp->t_state, rack, + tp->snd_una, tp->snd_max, tp->snd_nxt, changed); #endif goto proc_sack; } if (SEQ_LT(th_ack, rsm->r_start)) { /* Huh map is missing this */ #ifdef INVARIANTS printf("Rack map starts at r_start:%u for th_ack:%u huh? ts:%d rs:%d\n", - rsm->r_start, - th_ack, tp->t_state, rack->r_state); + rsm->r_start, + th_ack, tp->t_state, rack->r_state); #endif goto proc_sack; } rack_update_rtt(tp, rack, rsm, to, cts, CUM_ACKED); /* Now do we consume the whole thing? */ if (SEQ_GEQ(th_ack, rsm->r_end)) { /* Its all consumed. */ uint32_t left; rack->r_ctl.rc_holes_rxt -= rsm->r_rtr_bytes; rsm->r_rtr_bytes = 0; - TAILQ_REMOVE(&rack->r_ctl.rc_map, rsm, r_next); + if (rsm->r_flags & RACK_TLP) + rack->r_ctl.rc_tlp_rtx_out = 0; + rm = RB_REMOVE(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); +#ifdef INVARIANTS + if (rm != rsm) { + panic("removing head in rack:%p rsm:%p rm:%p", + rack, rsm, rm); + } +#endif if (rsm->r_in_tmap) { TAILQ_REMOVE(&rack->r_ctl.rc_tmap, rsm, r_tnext); rsm->r_in_tmap = 0; } - if (rack->r_ctl.rc_next == rsm) { - /* scoot along the marker */ - rack->r_ctl.rc_next = TAILQ_FIRST(&rack->r_ctl.rc_map); - } if (rsm->r_flags & RACK_ACKED) { /* * It was acked on the scoreboard -- remove * it from total */ rack->r_ctl.rc_sacked -= (rsm->r_end - rsm->r_start); } else if (rsm->r_flags & RACK_SACK_PASSED) { /* - * There are acked segments ACKED on the + * There are segments ACKED on the * scoreboard further up. We are seeing * reordering. */ + rsm->r_flags &= ~RACK_SACK_PASSED; counter_u64_add(rack_reorder_seen, 1); rsm->r_flags |= RACK_ACKED; rack->r_ctl.rc_reorder_ts = cts; } left = th_ack - rsm->r_end; if (rsm->r_rtr_cnt > 1) { /* * Technically we should make r_rtr_cnt be * monotonicly increasing and just mod it to * the timestamp it is replacing.. that way * we would have the last 3 retransmits. Now * rc_loss_count will be wrong if we * retransmit something more than 2 times in * recovery :( */ rack->r_ctl.rc_loss_count += (rsm->r_rtr_cnt - 1); } /* Free back to zone */ rack_free(rack, rsm); if (left) { goto more; } goto proc_sack; } if (rsm->r_flags & RACK_ACKED) { /* * It was acked on the scoreboard -- remove it from * total for the part being cum-acked. */ rack->r_ctl.rc_sacked -= (th_ack - rsm->r_start); } - rack->r_ctl.rc_holes_rxt -= rsm->r_rtr_bytes; - rsm->r_rtr_bytes = 0; + /* + * Clear the dup ack count for + * the piece that remains. + */ + rsm->r_dupack = 0; + rack_log_retran_reason(rack, rsm, __LINE__, 0, 2); + if (rsm->r_rtr_bytes) { + /* + * It was retransmitted adjust the + * sack holes for what was acked. + */ + int ack_am; + + ack_am = (th_ack - rsm->r_start); + if (ack_am >= rsm->r_rtr_bytes) { + rack->r_ctl.rc_holes_rxt -= ack_am; + rsm->r_rtr_bytes -= ack_am; + } + } + /* Update where the piece starts */ rsm->r_start = th_ack; } proc_sack: /* Check for reneging */ - rsm = TAILQ_FIRST(&rack->r_ctl.rc_map); + rsm = RB_MIN(rack_rb_tree_head, &rack->r_ctl.rc_mtree); if (rsm && (rsm->r_flags & RACK_ACKED) && (th_ack == rsm->r_start)) { /* * The peer has moved snd_una up to * the edge of this send, i.e. one * that it had previously acked. The only * way that can be true if the peer threw * away data (space issues) that it had * previously sacked (else it would have * given us snd_una up to (rsm->r_end). * We need to undo the acked markings here. * * Note we have to look to make sure th_ack is * our rsm->r_start in case we get an old ack * where th_ack is behind snd_una. */ rack_peer_reneges(rack, rsm, th->th_ack); } if ((to->to_flags & TOF_SACK) == 0) { - /* We are done nothing left to log */ + /* We are done nothing left */ goto out; } - rsm = TAILQ_LAST_FAST(&rack->r_ctl.rc_map, rack_sendmap, r_next); - if (rsm) { - last_seq = rsm->r_end; - } else { - last_seq = tp->snd_max; - } /* Sack block processing */ if (SEQ_GT(th_ack, tp->snd_una)) ack_point = th_ack; else ack_point = tp->snd_una; for (i = 0; i < to->to_nsacks; i++) { bcopy((to->to_sacks + i * TCPOLEN_SACK), - &sack, sizeof(sack)); + &sack, sizeof(sack)); sack.start = ntohl(sack.start); sack.end = ntohl(sack.end); if (SEQ_GT(sack.end, sack.start) && SEQ_GT(sack.start, ack_point) && SEQ_LT(sack.start, tp->snd_max) && SEQ_GT(sack.end, ack_point) && SEQ_LEQ(sack.end, tp->snd_max)) { - if ((rack->r_ctl.rc_num_maps_alloced > rack_sack_block_limit) && - (SEQ_LT(sack.end, last_seq)) && - ((sack.end - sack.start) < (tp->t_maxseg / 8))) { - /* - * Not the last piece and its smaller than - * 1/8th of a MSS. We ignore this. - */ - counter_u64_add(rack_runt_sacks, 1); - continue; - } sack_blocks[num_sack_blks] = sack; num_sack_blks++; +#ifdef NETFLIX_STATS } else if (SEQ_LEQ(sack.start, th_ack) && SEQ_LEQ(sack.end, th_ack)) { /* * Its a D-SACK block. */ -/* tcp_record_dsack(sack.start, sack.end); */ + tcp_record_dsack(sack.start, sack.end); +#endif } + } - if (num_sack_blks == 0) - goto out; /* * Sort the SACK blocks so we can update the rack scoreboard with * just one pass. */ if (rack_use_sack_filter) { num_sack_blks = sack_filter_blks(&rack->r_ctl.rack_sf, sack_blocks, num_sack_blks, th->th_ack); ctf_log_sack_filter(rack->rc_tp, num_sack_blks, sack_blocks); } + if (num_sack_blks == 0) { + /* Nothing to sack (DSACKs?) */ + goto out_with_totals; + } if (num_sack_blks < 2) { + /* Only one, we don't need to sort */ goto do_sack_work; } /* Sort the sacks */ for (i = 0; i < num_sack_blks; i++) { for (j = i + 1; j < num_sack_blks; j++) { if (SEQ_GT(sack_blocks[i].end, sack_blocks[j].end)) { sack = sack_blocks[i]; sack_blocks[i] = sack_blocks[j]; sack_blocks[j] = sack; } } } /* * Now are any of the sack block ends the same (yes some - * implememtations send these)? + * implementations send these)? */ again: + if (num_sack_blks == 0) + goto out_with_totals; if (num_sack_blks > 1) { for (i = 0; i < num_sack_blks; i++) { for (j = i + 1; j < num_sack_blks; j++) { if (sack_blocks[i].end == sack_blocks[j].end) { /* * Ok these two have the same end we * want the smallest end and then * throw away the larger and start * again. */ if (SEQ_LT(sack_blocks[j].start, sack_blocks[i].start)) { /* * The second block covers * more area use that */ sack_blocks[i].start = sack_blocks[j].start; } /* * Now collapse out the dup-sack and * lower the count */ for (k = (j + 1); k < num_sack_blks; k++) { sack_blocks[j].start = sack_blocks[k].start; sack_blocks[j].end = sack_blocks[k].end; j++; } num_sack_blks--; goto again; } } } } do_sack_work: + /* + * First lets look to see if + * we have retransmitted and + * can use the transmit next? + */ + rsm = TAILQ_FIRST(&rack->r_ctl.rc_tmap); + if (rsm && + SEQ_GT(sack_blocks[0].end, rsm->r_start) && + SEQ_LT(sack_blocks[0].start, rsm->r_end)) { + /* + * We probably did the FR and the next + * SACK in continues as we would expect. + */ + acked = rack_proc_sack_blk(tp, rack, &sack_blocks[0], to, &rsm, cts, &moved_two); + if (acked) { + rack->r_wanted_output++; + changed += acked; + sack_changed += acked; + } + if (num_sack_blks == 1) { + /* + * This is what we would expect from + * a normal implementation to happen + * after we have retransmitted the FR, + * i.e the sack-filter pushes down + * to 1 block and the next to be retransmitted + * is the sequence in the sack block (has more + * are acked). Count this as ACK'd data to boost + * up the chances of recovering any false positives. + */ + rack->r_ctl.ack_count += (acked / ctf_fixed_maxseg(rack->rc_tp)); + counter_u64_add(rack_ack_total, (acked / ctf_fixed_maxseg(rack->rc_tp))); + counter_u64_add(rack_express_sack, 1); + if (rack->r_ctl.ack_count > 0xfff00000) { + /* + * reduce the number to keep us under + * a uint32_t. + */ + rack->r_ctl.ack_count /= 2; + rack->r_ctl.sack_count /= 2; + } + goto out_with_totals; + } else { + /* + * Start the loop through the + * rest of blocks, past the first block. + */ + moved_two = 0; + loop_start = 1; + } + } + /* Its a sack of some sort */ + rack->r_ctl.sack_count++; + if (rack->r_ctl.sack_count > 0xfff00000) { + /* + * reduce the number to keep us under + * a uint32_t. + */ + rack->r_ctl.ack_count /= 2; + rack->r_ctl.sack_count /= 2; + } + counter_u64_add(rack_sack_total, 1); + if (rack->sack_attack_disable) { + /* An attacker disablement is in place */ + if (num_sack_blks > 1) { + rack->r_ctl.sack_count += (num_sack_blks - 1); + rack->r_ctl.sack_moved_extra++; + counter_u64_add(rack_move_some, 1); + if (rack->r_ctl.sack_moved_extra > 0xfff00000) { + rack->r_ctl.sack_moved_extra /= 2; + rack->r_ctl.sack_noextra_move /= 2; + } + } + goto out; + } rsm = rack->r_ctl.rc_sacklast; - for (i = 0; i < num_sack_blks; i++) { - acked = rack_proc_sack_blk(tp, rack, &sack_blocks[i], to, &rsm, cts); + for (i = loop_start; i < num_sack_blks; i++) { + acked = rack_proc_sack_blk(tp, rack, &sack_blocks[i], to, &rsm, cts, &moved_two); if (acked) { rack->r_wanted_output++; changed += acked; sack_changed += acked; } + if (moved_two) { + /* + * If we did not get a SACK for at least a MSS and + * had to move at all, or if we moved more than our + * threshold, it counts against the "extra" move. + */ + rack->r_ctl.sack_moved_extra += moved_two; + counter_u64_add(rack_move_some, 1); + } else { + /* + * else we did not have to move + * any more than we would expect. + */ + rack->r_ctl.sack_noextra_move++; + counter_u64_add(rack_move_none, 1); + } + if (moved_two && (acked < ctf_fixed_maxseg(rack->rc_tp))) { + /* + * If the SACK was not a full MSS then + * we add to sack_count the number of + * MSS's (or possibly more than + * a MSS if its a TSO send) we had to skip by. + */ + rack->r_ctl.sack_count += moved_two; + counter_u64_add(rack_sack_total, moved_two); + } + /* + * Now we need to setup for the next + * round. First we make sure we won't + * exceed the size of our uint32_t on + * the various counts, and then clear out + * moved_two. + */ + if ((rack->r_ctl.sack_moved_extra > 0xfff00000) || + (rack->r_ctl.sack_noextra_move > 0xfff00000)) { + rack->r_ctl.sack_moved_extra /= 2; + rack->r_ctl.sack_noextra_move /= 2; + } + if (rack->r_ctl.sack_count > 0xfff00000) { + rack->r_ctl.ack_count /= 2; + rack->r_ctl.sack_count /= 2; + } + moved_two = 0; } +out_with_totals: + if (num_sack_blks > 1) { + /* + * You get an extra stroke if + * you have more than one sack-blk, this + * could be where we are skipping forward + * and the sack-filter is still working, or + * it could be an attacker constantly + * moving us. + */ + rack->r_ctl.sack_moved_extra++; + counter_u64_add(rack_move_some, 1); + } out: +#ifdef NETFLIX_EXP_DETECTION + if ((rack->do_detection || tcp_force_detection) && + tcp_sack_to_ack_thresh && + tcp_sack_to_move_thresh && + ((rack->r_ctl.rc_num_maps_alloced > tcp_map_minimum) || rack->sack_attack_disable)) { + /* + * We have thresholds set to find + * possible attackers and disable sack. + * Check them. + */ + uint64_t ackratio, moveratio, movetotal; + + /* Log detecting */ + rack_log_sad(rack, 1); + ackratio = (uint64_t)(rack->r_ctl.sack_count); + ackratio *= (uint64_t)(1000); + if (rack->r_ctl.ack_count) + ackratio /= (uint64_t)(rack->r_ctl.ack_count); + else { + /* We really should not hit here */ + ackratio = 1000; + } + if ((rack->sack_attack_disable == 0) && + (ackratio > rack_highest_sack_thresh_seen)) + rack_highest_sack_thresh_seen = (uint32_t)ackratio; + movetotal = rack->r_ctl.sack_moved_extra; + movetotal += rack->r_ctl.sack_noextra_move; + moveratio = rack->r_ctl.sack_moved_extra; + moveratio *= (uint64_t)1000; + if (movetotal) + moveratio /= movetotal; + else { + /* No moves, thats pretty good */ + moveratio = 0; + } + if ((rack->sack_attack_disable == 0) && + (moveratio > rack_highest_move_thresh_seen)) + rack_highest_move_thresh_seen = (uint32_t)moveratio; + if (rack->sack_attack_disable == 0) { + if ((ackratio > tcp_sack_to_ack_thresh) && + (moveratio > tcp_sack_to_move_thresh)) { + /* Disable sack processing */ + rack->sack_attack_disable = 1; + if (rack->r_rep_attack == 0) { + rack->r_rep_attack = 1; + counter_u64_add(rack_sack_attacks_detected, 1); + } + if (tcp_attack_on_turns_on_logging) { + /* + * Turn on logging, used for debugging + * false positives. + */ + rack->rc_tp->t_logstate = tcp_attack_on_turns_on_logging; + } + /* Clamp the cwnd at flight size */ + rack->r_ctl.rc_saved_cwnd = rack->rc_tp->snd_cwnd; + rack->rc_tp->snd_cwnd = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + rack_log_sad(rack, 2); + } + } else { + /* We are sack-disabled check for false positives */ + if ((ackratio <= tcp_restoral_thresh) || + (rack->r_ctl.rc_num_maps_alloced < tcp_map_minimum)) { + rack->sack_attack_disable = 0; + rack_log_sad(rack, 3); + /* Restart counting */ + rack->r_ctl.sack_count = 0; + rack->r_ctl.sack_moved_extra = 0; + rack->r_ctl.sack_noextra_move = 1; + rack->r_ctl.ack_count = max(1, + (BYTES_THIS_ACK(tp, th)/ctf_fixed_maxseg(rack->rc_tp))); + + if (rack->r_rep_reverse == 0) { + rack->r_rep_reverse = 1; + counter_u64_add(rack_sack_attacks_reversed, 1); + } + /* Restore the cwnd */ + if (rack->r_ctl.rc_saved_cwnd > rack->rc_tp->snd_cwnd) + rack->rc_tp->snd_cwnd = rack->r_ctl.rc_saved_cwnd; + } + } + } +#endif if (changed) { /* Something changed cancel the rack timer */ rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); } if ((sack_changed) && (!IN_RECOVERY(tp->t_flags))) { /* * Ok we have a high probability that we need to go in to * recovery since we have data sack'd */ struct rack_sendmap *rsm; uint32_t tsused; tsused = tcp_ts_getticks(); rsm = tcp_rack_output(tp, rack, tsused); if (rsm) { /* Enter recovery */ rack->r_ctl.rc_rsm_start = rsm->r_start; rack->r_ctl.rc_cwnd_at = tp->snd_cwnd; rack->r_ctl.rc_ssthresh_at = tp->snd_ssthresh; entered_recovery = 1; rack_cong_signal(tp, NULL, CC_NDUPACK); /* * When we enter recovery we need to assure we send * one packet. */ - rack->r_ctl.rc_prr_sndcnt = tp->t_maxseg; + rack->r_ctl.rc_prr_sndcnt = ctf_fixed_maxseg(tp); + rack_log_to_prr(rack, 8); rack->r_timer_override = 1; } } if (IN_RECOVERY(tp->t_flags) && (entered_recovery == 0)) { - /* Deal with changed an PRR here (in recovery only) */ + /* Deal with changed and PRR here (in recovery only) */ uint32_t pipe, snd_una; rack->r_ctl.rc_prr_delivered += changed; /* Compute prr_sndcnt */ if (SEQ_GT(tp->snd_una, th_ack)) { snd_una = tp->snd_una; } else { snd_una = th_ack; } pipe = ((tp->snd_max - snd_una) - rack->r_ctl.rc_sacked) + rack->r_ctl.rc_holes_rxt; if (pipe > tp->snd_ssthresh) { long sndcnt; sndcnt = rack->r_ctl.rc_prr_delivered * tp->snd_ssthresh; if (rack->r_ctl.rc_prr_recovery_fs > 0) sndcnt /= (long)rack->r_ctl.rc_prr_recovery_fs; else { rack->r_ctl.rc_prr_sndcnt = 0; + rack_log_to_prr(rack, 9); sndcnt = 0; } sndcnt++; if (sndcnt > (long)rack->r_ctl.rc_prr_out) sndcnt -= rack->r_ctl.rc_prr_out; else sndcnt = 0; rack->r_ctl.rc_prr_sndcnt = sndcnt; + rack_log_to_prr(rack, 10); } else { uint32_t limit; if (rack->r_ctl.rc_prr_delivered > rack->r_ctl.rc_prr_out) limit = (rack->r_ctl.rc_prr_delivered - rack->r_ctl.rc_prr_out); else limit = 0; if (changed > limit) limit = changed; - limit += tp->t_maxseg; + limit += ctf_fixed_maxseg(tp); if (tp->snd_ssthresh > pipe) { rack->r_ctl.rc_prr_sndcnt = min((tp->snd_ssthresh - pipe), limit); + rack_log_to_prr(rack, 11); } else { rack->r_ctl.rc_prr_sndcnt = min(0, limit); + rack_log_to_prr(rack, 12); } } - if (rack->r_ctl.rc_prr_sndcnt >= tp->t_maxseg) { + if (rack->r_ctl.rc_prr_sndcnt >= ctf_fixed_maxseg(tp)) { rack->r_timer_override = 1; } } } +static void +rack_strike_dupack(struct tcp_rack *rack) +{ + struct rack_sendmap *rsm; + + rsm = TAILQ_FIRST(&rack->r_ctl.rc_tmap); + if (rsm && (rsm->r_dupack < 0xff)) { + rsm->r_dupack++; + if (rsm->r_dupack >= DUP_ACK_THRESHOLD) { + rack->r_wanted_output = 1; + rack_log_retran_reason(rack, rsm, __LINE__, 1, 3); + } else { + rack_log_retran_reason(rack, rsm, __LINE__, 0, 3); + } + } +} + /* * Return value of 1, we do not need to call rack_process_data(). * return value of 0, rack_process_data can be called. * For ret_val if its 0 the TCP is locked, if its non-zero * its unlocked and probably unsafe to touch the TCB. */ static int rack_process_ack(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, uint32_t tiwin, int32_t tlen, int32_t * ofia, int32_t thflags, int32_t * ret_val) { int32_t ourfinisacked = 0; int32_t nsegs, acked_amount; int32_t acked; struct mbuf *mfree; struct tcp_rack *rack; int32_t recovery = 0; rack = (struct tcp_rack *)tp->t_fb_ptr; if (SEQ_GT(th->th_ack, tp->snd_max)) { - rack_do_dropafterack(m, tp, th, thflags, tlen, ret_val); + ctf_do_dropafterack(m, tp, th, thflags, tlen, ret_val); + rack->r_wanted_output++; return (1); } if (SEQ_GEQ(th->th_ack, tp->snd_una) || to->to_nsacks) { + if (rack->rc_in_persist) + tp->t_rxtshift = 0; + if ((th->th_ack == tp->snd_una) && (tiwin == tp->snd_wnd)) + rack_strike_dupack(rack); rack_log_ack(tp, to, th); } if (__predict_false(SEQ_LEQ(th->th_ack, tp->snd_una))) { /* * Old ack, behind (or duplicate to) the last one rcv'd * Note: Should mark reordering is occuring! We should also * look for sack blocks arriving e.g. ack 1, 4-4 then ack 1, * 3-3, 4-4 would be reording. As well as ack 1, 3-3 ack 3 */ return (0); } /* * If we reach this point, ACK is not a duplicate, i.e., it ACKs * something we sent. */ if (tp->t_flags & TF_NEEDSYN) { /* * T/TCP: Connection was half-synchronized, and our SYN has * been ACK'd (so connection is now fully synchronized). Go * to non-starred state, increment snd_una for ACK of SYN, * and check if we can do window scaling. */ tp->t_flags &= ~TF_NEEDSYN; tp->snd_una++; /* Do window scaling? */ if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) == (TF_RCVD_SCALE | TF_REQ_SCALE)) { tp->rcv_scale = tp->request_r_scale; /* Send window already scaled. */ } } nsegs = max(1, m->m_pkthdr.lro_nsegs); INP_WLOCK_ASSERT(tp->t_inpcb); acked = BYTES_THIS_ACK(tp, th); TCPSTAT_ADD(tcps_rcvackpack, nsegs); TCPSTAT_ADD(tcps_rcvackbyte, acked); /* * If we just performed our first retransmit, and the ACK arrives * within our recovery window, then it was a mistake to do the * retransmit in the first place. Recover our original cwnd and * ssthresh, and proceed to transmit where we left off. */ if (tp->t_flags & TF_PREVVALID) { tp->t_flags &= ~TF_PREVVALID; if (tp->t_rxtshift == 1 && (int)(ticks - tp->t_badrxtwin) < 0) rack_cong_signal(tp, th, CC_RTO_ERR); } /* * If we have a timestamp reply, update smoothed round trip time. If * no timestamp is present but transmit timer is running and timed * sequence number was acked, update smoothed round trip time. Since * we now have an rtt measurement, cancel the timer backoff (cf., * Phil Karn's retransmit alg.). Recompute the initial retransmit * timer. * * Some boxes send broken timestamp replies during the SYN+ACK * phase, ignore timestamps of 0 or we could calculate a huge RTT * and blow up the retransmit timer. */ /* * If all outstanding data is acked, stop retransmit timer and * remember to restart (more output or persist). If there is more * data to be acked, restart retransmit timer, using current * (possibly backed-off) value. */ if (th->th_ack == tp->snd_max) { rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); rack->r_wanted_output++; } - /* - * If no data (only SYN) was ACK'd, skip rest of ACK processing. - */ if (acked == 0) { if (ofia) *ofia = ourfinisacked; return (0); } if (rack->r_ctl.rc_early_recovery) { if (IN_RECOVERY(tp->t_flags)) { if (SEQ_LT(th->th_ack, tp->snd_recover) && (SEQ_LT(th->th_ack, tp->snd_max))) { tcp_rack_partialack(tp, th); } else { rack_post_recovery(tp, th); recovery = 1; } } } /* * Let the congestion control algorithm update congestion control * related information. This typically means increasing the * congestion window. */ rack_ack_received(tp, rack, th, nsegs, CC_ACK, recovery); SOCKBUF_LOCK(&so->so_snd); acked_amount = min(acked, (int)sbavail(&so->so_snd)); tp->snd_wnd -= acked_amount; mfree = sbcut_locked(&so->so_snd, acked_amount); if ((sbused(&so->so_snd) == 0) && (acked > acked_amount) && (tp->t_state >= TCPS_FIN_WAIT_1)) { ourfinisacked = 1; } /* NB: sowwakeup_locked() does an implicit unlock. */ sowwakeup_locked(so); m_freem(mfree); if (rack->r_ctl.rc_early_recovery == 0) { if (IN_RECOVERY(tp->t_flags)) { if (SEQ_LT(th->th_ack, tp->snd_recover) && (SEQ_LT(th->th_ack, tp->snd_max))) { tcp_rack_partialack(tp, th); } else { rack_post_recovery(tp, th); } } } tp->snd_una = th->th_ack; if (SEQ_GT(tp->snd_una, tp->snd_recover)) tp->snd_recover = tp->snd_una; if (SEQ_LT(tp->snd_nxt, tp->snd_una)) { tp->snd_nxt = tp->snd_una; } if (tp->snd_una == tp->snd_max) { /* Nothing left outstanding */ rack_log_progress_event(rack, tp, 0, PROGRESS_CLEAR, __LINE__); - tp->t_acktime = 0; + if (sbavail(&tp->t_inpcb->inp_socket->so_snd) == 0) + tp->t_acktime = 0; rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); /* Set need output so persist might get set */ rack->r_wanted_output++; if (rack_use_sack_filter) sack_filter_clear(&rack->r_ctl.rack_sf, tp->snd_una); if ((tp->t_state >= TCPS_FIN_WAIT_1) && (sbavail(&so->so_snd) == 0) && (tp->t_flags2 & TF2_DROP_AF_DATA)) { /* * The socket was gone and the * peer sent data, time to * reset him. */ *ret_val = 1; tp = tcp_close(tp); - rack_do_dropwithreset(m, tp, th, BANDLIM_UNLIMITED, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_UNLIMITED, tlen); return (1); } } if (ofia) *ofia = ourfinisacked; return (0); } +static void +rack_collapsed_window(struct tcp_rack *rack) +{ + /* + * Now we must walk the + * send map and divide the + * ones left stranded. These + * guys can't cause us to abort + * the connection and are really + * "unsent". However if a buggy + * client actually did keep some + * of the data i.e. collapsed the win + * and refused to ack and then opened + * the win and acked that data. We would + * get into an ack war, the simplier + * method then of just pretending we + * did not send those segments something + * won't work. + */ + struct rack_sendmap *rsm, *nrsm, fe, *insret; + tcp_seq max_seq; + uint32_t maxseg; + max_seq = rack->rc_tp->snd_una + rack->rc_tp->snd_wnd; + maxseg = ctf_fixed_maxseg(rack->rc_tp); + memset(&fe, 0, sizeof(fe)); + fe.r_start = max_seq; + /* Find the first seq past or at maxseq */ + rsm = RB_FIND(rack_rb_tree_head, &rack->r_ctl.rc_mtree, &fe); + if (rsm == NULL) { + /* Nothing to do strange */ + rack->rc_has_collapsed = 0; + return; + } + /* + * Now do we need to split at + * the collapse point? + */ + if (SEQ_GT(max_seq, rsm->r_start)) { + nrsm = rack_alloc_limit(rack, RACK_LIMIT_TYPE_SPLIT); + if (nrsm == NULL) { + /* We can't get a rsm, mark all? */ + nrsm = rsm; + goto no_split; + } + /* Clone it */ + rack_clone_rsm(rack, nrsm, rsm, max_seq); + insret = RB_INSERT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, nrsm); +#ifdef INVARIANTS + if (insret != NULL) { + panic("Insert in rb tree of %p fails ret:%p rack:%p rsm:%p", + nrsm, insret, rack, rsm); + } +#endif + if (rsm->r_in_tmap) { + TAILQ_INSERT_AFTER(&rack->r_ctl.rc_tmap, rsm, nrsm, r_tnext); + nrsm->r_in_tmap = 1; + } + /* + * Set in the new RSM as the + * collapsed starting point + */ + rsm = nrsm; + } +no_split: + counter_u64_add(rack_collapsed_win, 1); + RB_FOREACH_FROM(nrsm, rack_rb_tree_head, rsm) { + nrsm->r_flags |= RACK_RWND_COLLAPSED; + rack->rc_has_collapsed = 1; + } +} + +static void +rack_un_collapse_window(struct tcp_rack *rack) +{ + struct rack_sendmap *rsm; + + RB_FOREACH_REVERSE(rsm, rack_rb_tree_head, &rack->r_ctl.rc_mtree) { + if (rsm->r_flags & RACK_RWND_COLLAPSED) + rsm->r_flags &= ~RACK_RWND_COLLAPSED; + else + break; + } + rack->rc_has_collapsed = 0; +} + /* * Return value of 1, the TCB is unlocked and most * likely gone, return value of 0, the TCP is still * locked. */ static int rack_process_data(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) { /* * Update window information. Don't look at window if no ACK: TAC's * send garbage on first SYN. */ int32_t nsegs; -#ifdef TCP_RFC7413 int32_t tfo_syn; -#else -#define tfo_syn (FALSE) -#endif struct tcp_rack *rack; rack = (struct tcp_rack *)tp->t_fb_ptr; INP_WLOCK_ASSERT(tp->t_inpcb); nsegs = max(1, m->m_pkthdr.lro_nsegs); if ((thflags & TH_ACK) && (SEQ_LT(tp->snd_wl1, th->th_seq) || (tp->snd_wl1 == th->th_seq && (SEQ_LT(tp->snd_wl2, th->th_ack) || (tp->snd_wl2 == th->th_ack && tiwin > tp->snd_wnd))))) { /* keep track of pure window updates */ if (tlen == 0 && tp->snd_wl2 == th->th_ack && tiwin > tp->snd_wnd) TCPSTAT_INC(tcps_rcvwinupd); tp->snd_wnd = tiwin; tp->snd_wl1 = th->th_seq; tp->snd_wl2 = th->th_ack; if (tp->snd_wnd > tp->max_sndwnd) tp->max_sndwnd = tp->snd_wnd; rack->r_wanted_output++; } else if (thflags & TH_ACK) { if ((tp->snd_wl2 == th->th_ack) && (tiwin < tp->snd_wnd)) { tp->snd_wnd = tiwin; tp->snd_wl1 = th->th_seq; tp->snd_wl2 = th->th_ack; } } + if (tp->snd_wnd < ctf_outstanding(tp)) + /* The peer collapsed the window */ + rack_collapsed_window(rack); + else if (rack->rc_has_collapsed) + rack_un_collapse_window(rack); /* Was persist timer active and now we have window space? */ - if ((rack->rc_in_persist != 0) && tp->snd_wnd) { + if ((rack->rc_in_persist != 0) && + (tp->snd_wnd >= min((rack->r_ctl.rc_high_rwnd/2), + rack->r_ctl.rc_pace_min_segs))) { rack_exit_persist(tp, rack); tp->snd_nxt = tp->snd_max; /* Make sure we output to start the timer */ rack->r_wanted_output++; } + /* Do we enter persists? */ + if ((rack->rc_in_persist == 0) && + (tp->snd_wnd < min((rack->r_ctl.rc_high_rwnd/2), rack->r_ctl.rc_pace_min_segs)) && + TCPS_HAVEESTABLISHED(tp->t_state) && + (tp->snd_max == tp->snd_una) && + sbavail(&tp->t_inpcb->inp_socket->so_snd) && + (sbavail(&tp->t_inpcb->inp_socket->so_snd) > tp->snd_wnd)) { + /* + * Here the rwnd is less than + * the pacing size, we are established, + * nothing is outstanding, and there is + * data to send. Enter persists. + */ + tp->snd_nxt = tp->snd_una; + rack_enter_persist(tp, rack, rack->r_ctl.rc_rcvtime); + } if (tp->t_flags2 & TF2_DROP_AF_DATA) { m_freem(m); return (0); } /* * Process segments with URG. */ if ((thflags & TH_URG) && th->th_urp && TCPS_HAVERCVDFIN(tp->t_state) == 0) { /* * This is a kludge, but if we receive and accept random * urgent pointers, we'll crash in soreceive. It's hard to * imagine someone actually wanting to send this much urgent * data. */ SOCKBUF_LOCK(&so->so_rcv); if (th->th_urp + sbavail(&so->so_rcv) > sb_max) { th->th_urp = 0; /* XXX */ thflags &= ~TH_URG; /* XXX */ SOCKBUF_UNLOCK(&so->so_rcv); /* XXX */ goto dodata; /* XXX */ } /* * If this segment advances the known urgent pointer, then * mark the data stream. This should not happen in * CLOSE_WAIT, CLOSING, LAST_ACK or TIME_WAIT STATES since a * FIN has been received from the remote side. In these * states we ignore the URG. * * According to RFC961 (Assigned Protocols), the urgent * pointer points to the last octet of urgent data. We * continue, however, to consider it to indicate the first * octet of data past the urgent section as the original * spec states (in one of two places). */ if (SEQ_GT(th->th_seq + th->th_urp, tp->rcv_up)) { tp->rcv_up = th->th_seq + th->th_urp; so->so_oobmark = sbavail(&so->so_rcv) + (tp->rcv_up - tp->rcv_nxt) - 1; if (so->so_oobmark == 0) so->so_rcv.sb_state |= SBS_RCVATMARK; sohasoutofband(so); tp->t_oobflags &= ~(TCPOOB_HAVEDATA | TCPOOB_HADDATA); } SOCKBUF_UNLOCK(&so->so_rcv); /* * Remove out of band data so doesn't get presented to user. * This can happen independent of advancing the URG pointer, * but if two URG's are pending at once, some out-of-band * data may creep in... ick. */ if (th->th_urp <= (uint32_t) tlen && !(so->so_options & SO_OOBINLINE)) { /* hdr drop is delayed */ tcp_pulloutofband(so, th, m, drop_hdrlen); } } else { /* * If no out of band data is expected, pull receive urgent * pointer along with the receive window. */ if (SEQ_GT(tp->rcv_nxt, tp->rcv_up)) tp->rcv_up = tp->rcv_nxt; } dodata: /* XXX */ INP_WLOCK_ASSERT(tp->t_inpcb); /* * Process the segment text, merging it into the TCP sequencing * queue, and arranging for acknowledgment of receipt if necessary. * This process logically involves adjusting tp->rcv_wnd as data is * presented to the user (this happens in tcp_usrreq.c, case * PRU_RCVD). If a FIN has already been received on this connection * then we just ignore the text. */ -#ifdef TCP_RFC7413 tfo_syn = ((tp->t_state == TCPS_SYN_RECEIVED) && - (tp->t_flags & TF_FASTOPEN)); -#endif + IS_FASTOPEN(tp->t_flags)); if ((tlen || (thflags & TH_FIN) || tfo_syn) && TCPS_HAVERCVDFIN(tp->t_state) == 0) { tcp_seq save_start = th->th_seq; tcp_seq save_rnxt = tp->rcv_nxt; int save_tlen = tlen; m_adj(m, drop_hdrlen); /* delayed header drop */ /* * Insert segment which includes th into TCP reassembly * queue with control block tp. Set thflags to whether * reassembly now includes a segment with FIN. This handles * the common case inline (segment is the next to be * received on an established connection, and the queue is * empty), avoiding linkage into and removal from the queue * and repetition of various conversions. Set DELACK for * segments received in order, but ack immediately when * segments are out of order (so fast retransmit can work). */ if (th->th_seq == tp->rcv_nxt && SEGQ_EMPTY(tp) && (TCPS_HAVEESTABLISHED(tp->t_state) || tfo_syn)) { +#ifdef NETFLIX_SB_LIMITS + u_int mcnt, appended; + + if (so->so_rcv.sb_shlim) { + mcnt = m_memcnt(m); + appended = 0; + if (counter_fo_get(so->so_rcv.sb_shlim, mcnt, + CFO_NOSLEEP, NULL) == false) { + counter_u64_add(tcp_sb_shlim_fails, 1); + m_freem(m); + return (0); + } + } +#endif if (DELAY_ACK(tp, tlen) || tfo_syn) { rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); tp->t_flags |= TF_DELACK; } else { rack->r_wanted_output++; tp->t_flags |= TF_ACKNOW; } tp->rcv_nxt += tlen; thflags = th->th_flags & TH_FIN; TCPSTAT_ADD(tcps_rcvpack, nsegs); TCPSTAT_ADD(tcps_rcvbyte, tlen); SOCKBUF_LOCK(&so->so_rcv); - if (so->so_rcv.sb_state & SBS_CANTRCVMORE) + if (so->so_rcv.sb_state & SBS_CANTRCVMORE) { m_freem(m); - else - sbappendstream_locked(&so->so_rcv, m, 0); + } else +#ifdef NETFLIX_SB_LIMITS + appended = +#endif + sbappendstream_locked(&so->so_rcv, m, 0); /* NB: sorwakeup_locked() does an implicit unlock. */ sorwakeup_locked(so); +#ifdef NETFLIX_SB_LIMITS + if (so->so_rcv.sb_shlim && appended != mcnt) + counter_fo_release(so->so_rcv.sb_shlim, + mcnt - appended); +#endif } else { /* * XXX: Due to the header drop above "th" is * theoretically invalid by now. Fortunately * m_adj() doesn't actually frees any mbufs when * trimming from the head. */ tcp_seq temp = save_start; thflags = tcp_reass(tp, th, &temp, &tlen, m); tp->t_flags |= TF_ACKNOW; } if ((tp->t_flags & TF_SACK_PERMIT) && (save_tlen > 0)) { if ((tlen == 0) && (SEQ_LT(save_start, save_rnxt))) { /* * DSACK actually handled in the fastpath * above. */ tcp_update_sack_list(tp, save_start, save_start + save_tlen); } else if ((tlen > 0) && SEQ_GT(tp->rcv_nxt, save_rnxt)) { if ((tp->rcv_numsacks >= 1) && (tp->sackblks[0].end == save_start)) { /* * Partial overlap, recorded at todrop * above. */ tcp_update_sack_list(tp, tp->sackblks[0].start, tp->sackblks[0].end); } else { tcp_update_dsack_list(tp, save_start, save_start + save_tlen); } } else if (tlen >= save_tlen) { /* Update of sackblks. */ tcp_update_dsack_list(tp, save_start, save_start + save_tlen); } else if (tlen > 0) { tcp_update_dsack_list(tp, save_start, save_start + tlen); } } } else { m_freem(m); thflags &= ~TH_FIN; } /* * If FIN is received ACK the FIN and let the user know that the * connection is closing. */ if (thflags & TH_FIN) { if (TCPS_HAVERCVDFIN(tp->t_state) == 0) { socantrcvmore(so); /* * If connection is half-synchronized (ie NEEDSYN * flag on) then delay ACK, so it may be piggybacked * when SYN is sent. Otherwise, since we received a * FIN then no more input can be expected, send ACK * now. */ if (tp->t_flags & TF_NEEDSYN) { rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); tp->t_flags |= TF_DELACK; } else { tp->t_flags |= TF_ACKNOW; } tp->rcv_nxt++; } switch (tp->t_state) { /* * In SYN_RECEIVED and ESTABLISHED STATES enter the * CLOSE_WAIT state. */ case TCPS_SYN_RECEIVED: tp->t_starttime = ticks; /* FALLTHROUGH */ case TCPS_ESTABLISHED: rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); tcp_state_change(tp, TCPS_CLOSE_WAIT); break; /* * If still in FIN_WAIT_1 STATE FIN has not been * acked so enter the CLOSING state. */ case TCPS_FIN_WAIT_1: rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); tcp_state_change(tp, TCPS_CLOSING); break; /* * In FIN_WAIT_2 state enter the TIME_WAIT state, * starting the time-wait timer, turning off the * other standard timers. */ case TCPS_FIN_WAIT_2: rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); INP_INFO_RLOCK_ASSERT(&V_tcbinfo); tcp_twstart(tp); return (1); } } /* * Return any desired output. */ if ((tp->t_flags & TF_ACKNOW) || (sbavail(&so->so_snd) > (tp->snd_max - tp->snd_una))) { rack->r_wanted_output++; } INP_WLOCK_ASSERT(tp->t_inpcb); return (0); } /* * Here nothing is really faster, its just that we * have broken out the fast-data path also just like * the fast-ack. */ static int rack_do_fastnewdata(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t nxt_pkt) { int32_t nsegs; int32_t newsize = 0; /* automatic sockbuf scaling */ struct tcp_rack *rack; +#ifdef NETFLIX_SB_LIMITS + u_int mcnt, appended; +#endif #ifdef TCPDEBUG /* * The size of tcp_saveipgen must be the size of the max ip header, * now IPv6. */ u_char tcp_saveipgen[IP6_HDR_LEN]; struct tcphdr tcp_savetcp; short ostate = 0; #endif /* * If last ACK falls within this segment's sequence numbers, record * the timestamp. NOTE that the test is modified according to the * latest proposal of the tcplw@cray.com list (Braden 1993/04/26). */ if (__predict_false(th->th_seq != tp->rcv_nxt)) { return (0); } if (__predict_false(tp->snd_nxt != tp->snd_max)) { return (0); } if (tiwin && tiwin != tp->snd_wnd) { return (0); } if (__predict_false((tp->t_flags & (TF_NEEDSYN | TF_NEEDFIN)))) { return (0); } if (__predict_false((to->to_flags & TOF_TS) && (TSTMP_LT(to->to_tsval, tp->ts_recent)))) { return (0); } if (__predict_false((th->th_ack != tp->snd_una))) { return (0); } if (__predict_false(tlen > sbspace(&so->so_rcv))) { return (0); } if ((to->to_flags & TOF_TS) != 0 && SEQ_LEQ(th->th_seq, tp->last_ack_sent)) { tp->ts_recent_age = tcp_ts_getticks(); tp->ts_recent = to->to_tsval; } rack = (struct tcp_rack *)tp->t_fb_ptr; /* * This is a pure, in-sequence data packet with nothing on the * reassembly queue and we have enough buffer space to take it. */ nsegs = max(1, m->m_pkthdr.lro_nsegs); - +#ifdef NETFLIX_SB_LIMITS + if (so->so_rcv.sb_shlim) { + mcnt = m_memcnt(m); + appended = 0; + if (counter_fo_get(so->so_rcv.sb_shlim, mcnt, + CFO_NOSLEEP, NULL) == false) { + counter_u64_add(tcp_sb_shlim_fails, 1); + m_freem(m); + return (1); + } + } +#endif /* Clean receiver SACK report if present */ if (tp->rcv_numsacks) - tcp_clean_sackreport(tp); + tcp_clean_sackreport(tp); TCPSTAT_INC(tcps_preddat); tp->rcv_nxt += tlen; /* * Pull snd_wl1 up to prevent seq wrap relative to th_seq. */ tp->snd_wl1 = th->th_seq; /* * Pull rcv_up up to prevent seq wrap relative to rcv_nxt. */ tp->rcv_up = tp->rcv_nxt; TCPSTAT_ADD(tcps_rcvpack, nsegs); TCPSTAT_ADD(tcps_rcvbyte, tlen); #ifdef TCPDEBUG if (so->so_options & SO_DEBUG) tcp_trace(TA_INPUT, ostate, tp, (void *)tcp_saveipgen, &tcp_savetcp, 0); #endif newsize = tcp_autorcvbuf(m, th, so, tp, tlen); /* Add data to socket buffer. */ SOCKBUF_LOCK(&so->so_rcv); if (so->so_rcv.sb_state & SBS_CANTRCVMORE) { m_freem(m); } else { /* * Set new socket buffer size. Give up when limit is * reached. */ if (newsize) if (!sbreserve_locked(&so->so_rcv, newsize, so, NULL)) so->so_rcv.sb_flags &= ~SB_AUTOSIZE; m_adj(m, drop_hdrlen); /* delayed header drop */ - sbappendstream_locked(&so->so_rcv, m, 0); - rack_calc_rwin(so, tp); +#ifdef NETFLIX_SB_LIMITS + appended = +#endif + sbappendstream_locked(&so->so_rcv, m, 0); + ctf_calc_rwin(so, tp); } /* NB: sorwakeup_locked() does an implicit unlock. */ sorwakeup_locked(so); +#ifdef NETFLIX_SB_LIMITS + if (so->so_rcv.sb_shlim && mcnt != appended) + counter_fo_release(so->so_rcv.sb_shlim, mcnt - appended); +#endif if (DELAY_ACK(tp, tlen)) { rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); tp->t_flags |= TF_DELACK; } else { tp->t_flags |= TF_ACKNOW; rack->r_wanted_output++; } if ((tp->snd_una == tp->snd_max) && rack_use_sack_filter) sack_filter_clear(&rack->r_ctl.rack_sf, tp->snd_una); return (1); } /* * This subfunction is used to try to highly optimize the * fast path. We again allow window updates that are * in sequence to remain in the fast-path. We also add * in the __predict's to attempt to help the compiler. * Note that if we return a 0, then we can *not* process * it and the caller should push the packet into the * slow-path. */ static int rack_fastack(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t nxt_pkt, uint32_t cts) { int32_t acked; int32_t nsegs; #ifdef TCPDEBUG /* * The size of tcp_saveipgen must be the size of the max ip header, * now IPv6. */ u_char tcp_saveipgen[IP6_HDR_LEN]; struct tcphdr tcp_savetcp; short ostate = 0; #endif struct tcp_rack *rack; if (__predict_false(SEQ_LEQ(th->th_ack, tp->snd_una))) { /* Old ack, behind (or duplicate to) the last one rcv'd */ return (0); } if (__predict_false(SEQ_GT(th->th_ack, tp->snd_max))) { /* Above what we have sent? */ return (0); } if (__predict_false(tp->snd_nxt != tp->snd_max)) { /* We are retransmitting */ return (0); } if (__predict_false(tiwin == 0)) { /* zero window */ return (0); } if (__predict_false(tp->t_flags & (TF_NEEDSYN | TF_NEEDFIN))) { /* We need a SYN or a FIN, unlikely.. */ return (0); } if ((to->to_flags & TOF_TS) && __predict_false(TSTMP_LT(to->to_tsval, tp->ts_recent))) { /* Timestamp is behind .. old ack with seq wrap? */ return (0); } if (__predict_false(IN_RECOVERY(tp->t_flags))) { /* Still recovering */ return (0); } rack = (struct tcp_rack *)tp->t_fb_ptr; if (rack->r_ctl.rc_sacked) { /* We have sack holes on our scoreboard */ return (0); } /* Ok if we reach here, we can process a fast-ack */ nsegs = max(1, m->m_pkthdr.lro_nsegs); rack_log_ack(tp, to, th); + /* + * We made progress, clear the tlp + * out flag so we could start a TLP + * again. + */ + rack->r_ctl.rc_tlp_rtx_out = 0; /* Did the window get updated? */ if (tiwin != tp->snd_wnd) { tp->snd_wnd = tiwin; tp->snd_wl1 = th->th_seq; if (tp->snd_wnd > tp->max_sndwnd) tp->max_sndwnd = tp->snd_wnd; } - if ((rack->rc_in_persist != 0) && (tp->snd_wnd >= tp->t_maxseg)) { + /* Do we exit persists? */ + if ((rack->rc_in_persist != 0) && + (tp->snd_wnd >= min((rack->r_ctl.rc_high_rwnd/2), + rack->r_ctl.rc_pace_min_segs))) { rack_exit_persist(tp, rack); } + /* Do we enter persists? */ + if ((rack->rc_in_persist == 0) && + (tp->snd_wnd < min((rack->r_ctl.rc_high_rwnd/2), rack->r_ctl.rc_pace_min_segs)) && + TCPS_HAVEESTABLISHED(tp->t_state) && + (tp->snd_max == tp->snd_una) && + sbavail(&tp->t_inpcb->inp_socket->so_snd) && + (sbavail(&tp->t_inpcb->inp_socket->so_snd) > tp->snd_wnd)) { + /* + * Here the rwnd is less than + * the pacing size, we are established, + * nothing is outstanding, and there is + * data to send. Enter persists. + */ + tp->snd_nxt = tp->snd_una; + rack_enter_persist(tp, rack, rack->r_ctl.rc_rcvtime); + } /* * If last ACK falls within this segment's sequence numbers, record * the timestamp. NOTE that the test is modified according to the * latest proposal of the tcplw@cray.com list (Braden 1993/04/26). */ if ((to->to_flags & TOF_TS) != 0 && SEQ_LEQ(th->th_seq, tp->last_ack_sent)) { tp->ts_recent_age = tcp_ts_getticks(); tp->ts_recent = to->to_tsval; } /* * This is a pure ack for outstanding data. */ TCPSTAT_INC(tcps_predack); /* * "bad retransmit" recovery. */ if (tp->t_flags & TF_PREVVALID) { tp->t_flags &= ~TF_PREVVALID; if (tp->t_rxtshift == 1 && (int)(ticks - tp->t_badrxtwin) < 0) rack_cong_signal(tp, th, CC_RTO_ERR); } /* * Recalculate the transmit timer / rtt. * * Some boxes send broken timestamp replies during the SYN+ACK * phase, ignore timestamps of 0 or we could calculate a huge RTT * and blow up the retransmit timer. */ acked = BYTES_THIS_ACK(tp, th); #ifdef TCP_HHOOK /* Run HHOOK_TCP_ESTABLISHED_IN helper hooks. */ hhook_run_tcp_est_in(tp, th, to); #endif TCPSTAT_ADD(tcps_rcvackpack, nsegs); TCPSTAT_ADD(tcps_rcvackbyte, acked); sbdrop(&so->so_snd, acked); /* * Let the congestion control algorithm update congestion control * related information. This typically means increasing the * congestion window. */ rack_ack_received(tp, rack, th, nsegs, CC_ACK, 0); tp->snd_una = th->th_ack; + if (tp->snd_wnd < ctf_outstanding(tp)) { + /* The peer collapsed the window */ + rack_collapsed_window(rack); + } else if (rack->rc_has_collapsed) + rack_un_collapse_window(rack); + /* * Pull snd_wl2 up to prevent seq wrap relative to th_ack. */ tp->snd_wl2 = th->th_ack; tp->t_dupacks = 0; m_freem(m); /* ND6_HINT(tp); *//* Some progress has been made. */ /* * If all outstanding data are acked, stop retransmit timer, * otherwise restart timer using current (possibly backed-off) * value. If process is waiting for space, wakeup/selwakeup/signal. * If data are ready to send, let tcp_output decide between more * output or persist. */ #ifdef TCPDEBUG if (so->so_options & SO_DEBUG) tcp_trace(TA_INPUT, ostate, tp, (void *)tcp_saveipgen, &tcp_savetcp, 0); #endif if (tp->snd_una == tp->snd_max) { rack_log_progress_event(rack, tp, 0, PROGRESS_CLEAR, __LINE__); - tp->t_acktime = 0; + if (sbavail(&tp->t_inpcb->inp_socket->so_snd) == 0) + tp->t_acktime = 0; rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); } /* Wake up the socket if we have room to write more */ sowwakeup(so); if (sbavail(&so->so_snd)) { rack->r_wanted_output++; } return (1); } /* * Return value of 1, the TCB is unlocked and most * likely gone, return value of 0, the TCP is still * locked. */ static int rack_do_syn_sent(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) { int32_t ret_val = 0; int32_t todrop; int32_t ourfinisacked = 0; + struct tcp_rack *rack; - rack_calc_rwin(so, tp); + ctf_calc_rwin(so, tp); /* * If the state is SYN_SENT: if seg contains an ACK, but not for our * SYN, drop the input. if seg contains a RST, then drop the * connection. if seg does not contain SYN, then drop it. Otherwise * this is an acceptable SYN segment initialize tp->rcv_nxt and * tp->irs if seg contains ack then advance tp->snd_una if seg * contains an ECE and ECN support is enabled, the stream is ECN * capable. if SYN has been acked change to ESTABLISHED else * SYN_RCVD state arrange for segment to be acked (eventually) * continue processing rest of data/controls, beginning with URG */ if ((thflags & TH_ACK) && (SEQ_LEQ(th->th_ack, tp->iss) || SEQ_GT(th->th_ack, tp->snd_max))) { - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return (1); } if ((thflags & (TH_ACK | TH_RST)) == (TH_ACK | TH_RST)) { TCP_PROBE5(connect__refused, NULL, tp, mtod(m, const char *), tp, th); tp = tcp_drop(tp, ECONNREFUSED); - rack_do_drop(m, tp); + ctf_do_drop(m, tp); return (1); } if (thflags & TH_RST) { - rack_do_drop(m, tp); + ctf_do_drop(m, tp); return (1); } if (!(thflags & TH_SYN)) { - rack_do_drop(m, tp); + ctf_do_drop(m, tp); return (1); } tp->irs = th->th_seq; tcp_rcvseqinit(tp); + rack = (struct tcp_rack *)tp->t_fb_ptr; if (thflags & TH_ACK) { + int tfo_partial = 0; + TCPSTAT_INC(tcps_connects); soisconnected(so); #ifdef MAC mac_socketpeer_set_from_mbuf(m, so); #endif /* Do window scaling on this connection? */ if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) == (TF_RCVD_SCALE | TF_REQ_SCALE)) { tp->rcv_scale = tp->request_r_scale; } tp->rcv_adv += min(tp->rcv_wnd, TCP_MAXWIN << tp->rcv_scale); /* + * If not all the data that was sent in the TFO SYN + * has been acked, resend the remainder right away. + */ + if (IS_FASTOPEN(tp->t_flags) && + (tp->snd_una != tp->snd_max)) { + tp->snd_nxt = th->th_ack; + tfo_partial = 1; + } + /* * If there's data, delay ACK; if there's also a FIN ACKNOW * will be turned on later. */ - if (DELAY_ACK(tp, tlen) && tlen != 0) { - rack_timer_cancel(tp, (struct tcp_rack *)tp->t_fb_ptr, - ((struct tcp_rack *)tp->t_fb_ptr)->r_ctl.rc_rcvtime, __LINE__); + if (DELAY_ACK(tp, tlen) && tlen != 0 && (tfo_partial == 0)) { + rack_timer_cancel(tp, rack, + rack->r_ctl.rc_rcvtime, __LINE__); tp->t_flags |= TF_DELACK; } else { - ((struct tcp_rack *)tp->t_fb_ptr)->r_wanted_output++; + rack->r_wanted_output++; tp->t_flags |= TF_ACKNOW; } - if ((thflags & TH_ECE) && V_tcp_do_ecn) { + if (((thflags & (TH_CWR | TH_ECE)) == TH_ECE) && + V_tcp_do_ecn) { tp->t_flags |= TF_ECN_PERMIT; TCPSTAT_INC(tcps_ecn_shs); } + if (SEQ_GT(th->th_ack, tp->snd_una)) { + /* + * We advance snd_una for the + * fast open case. If th_ack is + * acknowledging data beyond + * snd_una we can't just call + * ack-processing since the + * data stream in our send-map + * will start at snd_una + 1 (one + * beyond the SYN). If its just + * equal we don't need to do that + * and there is no send_map. + */ + tp->snd_una++; + } /* * Received in SYN_SENT[*] state. Transitions: * SYN_SENT --> ESTABLISHED SYN_SENT* --> FIN_WAIT_1 */ tp->t_starttime = ticks; if (tp->t_flags & TF_NEEDFIN) { tcp_state_change(tp, TCPS_FIN_WAIT_1); tp->t_flags &= ~TF_NEEDFIN; thflags &= ~TH_SYN; } else { tcp_state_change(tp, TCPS_ESTABLISHED); TCP_PROBE5(connect__established, NULL, tp, mtod(m, const char *), tp, th); cc_conn_init(tp); } } else { /* * Received initial SYN in SYN-SENT[*] state => simultaneous * open. If segment contains CC option and there is a * cached CC, apply TAO test. If it succeeds, connection is * * half-synchronized. Otherwise, do 3-way handshake: * SYN-SENT -> SYN-RECEIVED SYN-SENT* -> SYN-RECEIVED* If * there was no CC option, clear cached CC value. */ tp->t_flags |= (TF_ACKNOW | TF_NEEDSYN); tcp_state_change(tp, TCPS_SYN_RECEIVED); } INP_INFO_RLOCK_ASSERT(&V_tcbinfo); INP_WLOCK_ASSERT(tp->t_inpcb); /* * Advance th->th_seq to correspond to first data byte. If data, * trim to stay within window, dropping FIN if necessary. */ th->th_seq++; if (tlen > tp->rcv_wnd) { todrop = tlen - tp->rcv_wnd; m_adj(m, -todrop); tlen = tp->rcv_wnd; thflags &= ~TH_FIN; TCPSTAT_INC(tcps_rcvpackafterwin); TCPSTAT_ADD(tcps_rcvbyteafterwin, todrop); } tp->snd_wl1 = th->th_seq - 1; tp->rcv_up = th->th_seq; /* * Client side of transaction: already sent SYN and data. If the * remote host used T/TCP to validate the SYN, our data will be * ACK'd; if so, enter normal data segment processing in the middle * of step 5, ack processing. Otherwise, goto step 6. */ if (thflags & TH_ACK) { + /* For syn-sent we need to possibly update the rtt */ + if ((to->to_flags & TOF_TS) != 0 && to->to_tsecr) { + uint32_t t; + + t = tcp_ts_getticks() - to->to_tsecr; + if (!tp->t_rttlow || tp->t_rttlow > t) + tp->t_rttlow = t; + tcp_rack_xmit_timer(rack, t + 1); + tcp_rack_xmit_timer_commit(rack, tp); + } if (rack_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) return (ret_val); /* We may have changed to FIN_WAIT_1 above */ if (tp->t_state == TCPS_FIN_WAIT_1) { /* * In FIN_WAIT_1 STATE in addition to the processing * for the ESTABLISHED state if our FIN is now * acknowledged then enter FIN_WAIT_2. */ if (ourfinisacked) { /* * If we can't receive any more data, then * closing user can proceed. Starting the * timer is contrary to the specification, * but if we don't get a FIN we'll hang * forever. * * XXXjl: we should release the tp also, and * use a compressed state. */ if (so->so_rcv.sb_state & SBS_CANTRCVMORE) { soisdisconnected(so); tcp_timer_activate(tp, TT_2MSL, (tcp_fast_finwait2_recycle ? tcp_finwait2_timeout : TP_MAXIDLE(tp))); } tcp_state_change(tp, TCPS_FIN_WAIT_2); } } } return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, - tiwin, thflags, nxt_pkt)); + tiwin, thflags, nxt_pkt)); } /* * Return value of 1, the TCB is unlocked and most * likely gone, return value of 0, the TCP is still * locked. */ static int rack_do_syn_recv(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) { + struct tcp_rack *rack; int32_t ret_val = 0; int32_t ourfinisacked = 0; - rack_calc_rwin(so, tp); - + ctf_calc_rwin(so, tp); if ((thflags & TH_ACK) && (SEQ_LEQ(th->th_ack, tp->snd_una) || SEQ_GT(th->th_ack, tp->snd_max))) { - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return (1); } -#ifdef TCP_RFC7413 - if (tp->t_flags & TF_FASTOPEN) { + rack = (struct tcp_rack *)tp->t_fb_ptr; + if (IS_FASTOPEN(tp->t_flags)) { /* - * When a TFO connection is in SYN_RECEIVED, the only valid - * packets are the initial SYN, a retransmit/copy of the - * initial SYN (possibly with a subset of the original - * data), a valid ACK, a FIN, or a RST. + * When a TFO connection is in SYN_RECEIVED, the + * only valid packets are the initial SYN, a + * retransmit/copy of the initial SYN (possibly with + * a subset of the original data), a valid ACK, a + * FIN, or a RST. */ if ((thflags & (TH_SYN | TH_ACK)) == (TH_SYN | TH_ACK)) { - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return (1); } else if (thflags & TH_SYN) { /* non-initial SYN is ignored */ - struct tcp_rack *rack; - - rack = (struct tcp_rack *)tp->t_fb_ptr; if ((rack->r_ctl.rc_hpts_flags & PACE_TMR_RXT) || (rack->r_ctl.rc_hpts_flags & PACE_TMR_TLP) || (rack->r_ctl.rc_hpts_flags & PACE_TMR_RACK)) { - rack_do_drop(m, NULL); + ctf_do_drop(m, NULL); return (0); } } else if (!(thflags & (TH_ACK | TH_FIN | TH_RST))) { - rack_do_drop(m, NULL); + ctf_do_drop(m, NULL); return (0); } } -#endif - if (thflags & TH_RST) - return (rack_process_rst(m, th, so, tp)); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); /* - * RFC5961 Section 4.2 Send challenge ACK for any SYN in - * synchronized state. - */ - if (thflags & TH_SYN) { - rack_challenge_ack(m, th, tp, &ret_val); - return (ret_val); - } - /* * RFC 1323 PAWS: If we have a timestamp reply on this segment and * it's less than ts_recent, drop it. */ if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && TSTMP_LT(to->to_tsval, tp->ts_recent)) { - if (rack_ts_check(m, th, tp, tlen, thflags, &ret_val)) + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) return (ret_val); } /* * In the SYN-RECEIVED state, validate that the packet belongs to * this connection before trimming the data to fit the receive * window. Check the sequence number versus IRS since we know the * sequence numbers haven't wrapped. This is a partial fix for the * "LAND" DoS attack. */ if (SEQ_LT(th->th_seq, tp->irs)) { - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return (1); } - if (rack_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { return (ret_val); } /* * If last ACK falls within this segment's sequence numbers, record * its timestamp. NOTE: 1) That the test incorporates suggestions * from the latest proposal of the tcplw@cray.com list (Braden * 1993/04/26). 2) That updating only on newer timestamps interferes * with our earlier PAWS tests, so this check should be solely * predicated on the sequence space of this segment. 3) That we * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + * SEG.Len, This modified check allows us to overcome RFC1323's * limitations as described in Stevens TCP/IP Illustrated Vol. 2 * p.869. In such cases, we can still calculate the RTT correctly * when RCV.NXT == Last.ACK.Sent. */ if ((to->to_flags & TOF_TS) != 0 && SEQ_LEQ(th->th_seq, tp->last_ack_sent) && SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + ((thflags & (TH_SYN | TH_FIN)) != 0))) { tp->ts_recent_age = tcp_ts_getticks(); tp->ts_recent = to->to_tsval; } + tp->snd_wnd = tiwin; /* * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag * is on (half-synchronized state), then queue data for later * processing; else drop segment and return. */ if ((thflags & TH_ACK) == 0) { -#ifdef TCP_RFC7413 - if (tp->t_flags & TF_FASTOPEN) { - tp->snd_wnd = tiwin; + if (IS_FASTOPEN(tp->t_flags)) { cc_conn_init(tp); } -#endif return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } TCPSTAT_INC(tcps_connects); soisconnected(so); /* Do window scaling? */ if ((tp->t_flags & (TF_RCVD_SCALE | TF_REQ_SCALE)) == (TF_RCVD_SCALE | TF_REQ_SCALE)) { tp->rcv_scale = tp->request_r_scale; - tp->snd_wnd = tiwin; } /* * Make transitions: SYN-RECEIVED -> ESTABLISHED SYN-RECEIVED* -> * FIN-WAIT-1 */ tp->t_starttime = ticks; + if (IS_FASTOPEN(tp->t_flags) && tp->t_tfo_pending) { + tcp_fastopen_decrement_counter(tp->t_tfo_pending); + tp->t_tfo_pending = NULL; + + /* + * Account for the ACK of our SYN prior to + * regular ACK processing below. + */ + tp->snd_una++; + } if (tp->t_flags & TF_NEEDFIN) { tcp_state_change(tp, TCPS_FIN_WAIT_1); tp->t_flags &= ~TF_NEEDFIN; } else { tcp_state_change(tp, TCPS_ESTABLISHED); TCP_PROBE5(accept__established, NULL, tp, mtod(m, const char *), tp, th); -#ifdef TCP_RFC7413 - if (tp->t_tfo_pending) { - tcp_fastopen_decrement_counter(tp->t_tfo_pending); - tp->t_tfo_pending = NULL; - - /* - * Account for the ACK of our SYN prior to regular - * ACK processing below. - */ - tp->snd_una++; - } /* * TFO connections call cc_conn_init() during SYN * processing. Calling it again here for such connections * is not harmless as it would undo the snd_cwnd reduction * that occurs when a TFO SYN|ACK is retransmitted. */ - if (!(tp->t_flags & TF_FASTOPEN)) -#endif + if (!IS_FASTOPEN(tp->t_flags)) cc_conn_init(tp); } /* * If segment contains data or ACK, will call tcp_reass() later; if * not, do so now to pass queued data to user. */ if (tlen == 0 && (thflags & TH_FIN) == 0) - (void)tcp_reass(tp, (struct tcphdr *)0, NULL, 0, + (void) tcp_reass(tp, (struct tcphdr *)0, NULL, 0, (struct mbuf *)0); tp->snd_wl1 = th->th_seq - 1; + /* For syn-recv we need to possibly update the rtt */ + if ((to->to_flags & TOF_TS) != 0 && to->to_tsecr) { + uint32_t t; + + t = tcp_ts_getticks() - to->to_tsecr; + if (!tp->t_rttlow || tp->t_rttlow > t) + tp->t_rttlow = t; + tcp_rack_xmit_timer(rack, t + 1); + tcp_rack_xmit_timer_commit(rack, tp); + } if (rack_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) { return (ret_val); } if (tp->t_state == TCPS_FIN_WAIT_1) { /* We could have went to FIN_WAIT_1 (or EST) above */ /* * In FIN_WAIT_1 STATE in addition to the processing for the * ESTABLISHED state if our FIN is now acknowledged then * enter FIN_WAIT_2. */ if (ourfinisacked) { /* * If we can't receive any more data, then closing * user can proceed. Starting the timer is contrary * to the specification, but if we don't get a FIN * we'll hang forever. * * XXXjl: we should release the tp also, and use a * compressed state. */ if (so->so_rcv.sb_state & SBS_CANTRCVMORE) { soisdisconnected(so); tcp_timer_activate(tp, TT_2MSL, (tcp_fast_finwait2_recycle ? tcp_finwait2_timeout : TP_MAXIDLE(tp))); } tcp_state_change(tp, TCPS_FIN_WAIT_2); } } return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } /* * Return value of 1, the TCB is unlocked and most * likely gone, return value of 0, the TCP is still * locked. */ static int rack_do_established(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) { int32_t ret_val = 0; /* * Header prediction: check for the two common cases of a * uni-directional data xfer. If the packet has no control flags, * is in-sequence, the window didn't change and we're not * retransmitting, it's a candidate. If the length is zero and the * ack moved forward, we're the sender side of the xfer. Just free * the data acked & wake any higher level process that was blocked * waiting for space. If the length is non-zero and the ack didn't * move, we're the receiver side. If we're getting packets in-order * (the reassembly queue is empty), add the data toc The socket * buffer and note that we need a delayed ack. Make sure that the * hidden state-flags are also off. Since we check for * TCPS_ESTABLISHED first, it can only be TH_NEEDSYN. */ if (__predict_true(((to->to_flags & TOF_SACK) == 0)) && __predict_true((thflags & (TH_SYN | TH_FIN | TH_RST | TH_URG | TH_ACK)) == TH_ACK) && __predict_true(SEGQ_EMPTY(tp)) && __predict_true(th->th_seq == tp->rcv_nxt)) { struct tcp_rack *rack; rack = (struct tcp_rack *)tp->t_fb_ptr; if (tlen == 0) { if (rack_fastack(m, th, so, tp, to, drop_hdrlen, tlen, tiwin, nxt_pkt, rack->r_ctl.rc_rcvtime)) { return (0); } } else { if (rack_do_fastnewdata(m, th, so, tp, to, drop_hdrlen, tlen, tiwin, nxt_pkt)) { return (0); } } } - rack_calc_rwin(so, tp); + ctf_calc_rwin(so, tp); - if (thflags & TH_RST) - return (rack_process_rst(m, th, so, tp)); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); /* * RFC5961 Section 4.2 Send challenge ACK for any SYN in * synchronized state. */ if (thflags & TH_SYN) { - rack_challenge_ack(m, th, tp, &ret_val); + ctf_challenge_ack(m, th, tp, &ret_val); return (ret_val); } /* * RFC 1323 PAWS: If we have a timestamp reply on this segment and * it's less than ts_recent, drop it. */ if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && TSTMP_LT(to->to_tsval, tp->ts_recent)) { - if (rack_ts_check(m, th, tp, tlen, thflags, &ret_val)) + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) return (ret_val); } - if (rack_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { return (ret_val); } /* * If last ACK falls within this segment's sequence numbers, record * its timestamp. NOTE: 1) That the test incorporates suggestions * from the latest proposal of the tcplw@cray.com list (Braden * 1993/04/26). 2) That updating only on newer timestamps interferes * with our earlier PAWS tests, so this check should be solely * predicated on the sequence space of this segment. 3) That we * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + * SEG.Len, This modified check allows us to overcome RFC1323's * limitations as described in Stevens TCP/IP Illustrated Vol. 2 * p.869. In such cases, we can still calculate the RTT correctly * when RCV.NXT == Last.ACK.Sent. */ if ((to->to_flags & TOF_TS) != 0 && SEQ_LEQ(th->th_seq, tp->last_ack_sent) && SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + ((thflags & (TH_SYN | TH_FIN)) != 0))) { tp->ts_recent_age = tcp_ts_getticks(); tp->ts_recent = to->to_tsval; } /* * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag * is on (half-synchronized state), then queue data for later * processing; else drop segment and return. */ if ((thflags & TH_ACK) == 0) { if (tp->t_flags & TF_NEEDSYN) { return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } else if (tp->t_flags & TF_ACKNOW) { - rack_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ((struct tcp_rack *)tp->t_fb_ptr)->r_wanted_output++; return (ret_val); } else { - rack_do_drop(m, NULL); + ctf_do_drop(m, NULL); return (0); } } /* * Ack processing. */ if (rack_process_ack(m, th, so, tp, to, tiwin, tlen, NULL, thflags, &ret_val)) { return (ret_val); } if (sbavail(&so->so_snd)) { if (rack_progress_timeout_check(tp)) { tcp_set_inp_to_drop(tp->t_inpcb, ETIMEDOUT); - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return (1); } } /* State changes only happen in rack_process_data() */ return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } /* * Return value of 1, the TCB is unlocked and most * likely gone, return value of 0, the TCP is still * locked. */ static int rack_do_close_wait(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) { int32_t ret_val = 0; - rack_calc_rwin(so, tp); - if (thflags & TH_RST) - return (rack_process_rst(m, th, so, tp)); + ctf_calc_rwin(so, tp); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); /* * RFC5961 Section 4.2 Send challenge ACK for any SYN in * synchronized state. */ if (thflags & TH_SYN) { - rack_challenge_ack(m, th, tp, &ret_val); + ctf_challenge_ack(m, th, tp, &ret_val); return (ret_val); } /* * RFC 1323 PAWS: If we have a timestamp reply on this segment and * it's less than ts_recent, drop it. */ if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && TSTMP_LT(to->to_tsval, tp->ts_recent)) { - if (rack_ts_check(m, th, tp, tlen, thflags, &ret_val)) + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) return (ret_val); } - if (rack_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { return (ret_val); } /* * If last ACK falls within this segment's sequence numbers, record * its timestamp. NOTE: 1) That the test incorporates suggestions * from the latest proposal of the tcplw@cray.com list (Braden * 1993/04/26). 2) That updating only on newer timestamps interferes * with our earlier PAWS tests, so this check should be solely * predicated on the sequence space of this segment. 3) That we * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + * SEG.Len, This modified check allows us to overcome RFC1323's * limitations as described in Stevens TCP/IP Illustrated Vol. 2 * p.869. In such cases, we can still calculate the RTT correctly * when RCV.NXT == Last.ACK.Sent. */ if ((to->to_flags & TOF_TS) != 0 && SEQ_LEQ(th->th_seq, tp->last_ack_sent) && SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + ((thflags & (TH_SYN | TH_FIN)) != 0))) { tp->ts_recent_age = tcp_ts_getticks(); tp->ts_recent = to->to_tsval; } /* * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag * is on (half-synchronized state), then queue data for later * processing; else drop segment and return. */ if ((thflags & TH_ACK) == 0) { if (tp->t_flags & TF_NEEDSYN) { return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } else if (tp->t_flags & TF_ACKNOW) { - rack_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ((struct tcp_rack *)tp->t_fb_ptr)->r_wanted_output++; return (ret_val); } else { - rack_do_drop(m, NULL); + ctf_do_drop(m, NULL); return (0); } } /* * Ack processing. */ if (rack_process_ack(m, th, so, tp, to, tiwin, tlen, NULL, thflags, &ret_val)) { return (ret_val); } if (sbavail(&so->so_snd)) { if (rack_progress_timeout_check(tp)) { tcp_set_inp_to_drop(tp->t_inpcb, ETIMEDOUT); - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return (1); } } return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } static int rack_check_data_after_close(struct mbuf *m, struct tcpcb *tp, int32_t *tlen, struct tcphdr *th, struct socket *so) { - struct tcp_rack *rack; + struct tcp_rack *rack; INP_INFO_RLOCK_ASSERT(&V_tcbinfo); rack = (struct tcp_rack *)tp->t_fb_ptr; if (rack->rc_allow_data_af_clo == 0) { close_now: tp = tcp_close(tp); TCPSTAT_INC(tcps_rcvafterclose); - rack_do_dropwithreset(m, tp, th, BANDLIM_UNLIMITED, (*tlen)); + ctf_do_dropwithreset(m, tp, th, BANDLIM_UNLIMITED, (*tlen)); return (1); } if (sbavail(&so->so_snd) == 0) goto close_now; /* Ok we allow data that is ignored and a followup reset */ tp->rcv_nxt = th->th_seq + *tlen; tp->t_flags2 |= TF2_DROP_AF_DATA; rack->r_wanted_output = 1; *tlen = 0; return (0); } /* * Return value of 1, the TCB is unlocked and most * likely gone, return value of 0, the TCP is still * locked. */ static int rack_do_fin_wait_1(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) { int32_t ret_val = 0; int32_t ourfinisacked = 0; - rack_calc_rwin(so, tp); + ctf_calc_rwin(so, tp); - if (thflags & TH_RST) - return (rack_process_rst(m, th, so, tp)); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); /* * RFC5961 Section 4.2 Send challenge ACK for any SYN in * synchronized state. */ if (thflags & TH_SYN) { - rack_challenge_ack(m, th, tp, &ret_val); + ctf_challenge_ack(m, th, tp, &ret_val); return (ret_val); } /* * RFC 1323 PAWS: If we have a timestamp reply on this segment and * it's less than ts_recent, drop it. */ if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && TSTMP_LT(to->to_tsval, tp->ts_recent)) { - if (rack_ts_check(m, th, tp, tlen, thflags, &ret_val)) + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) return (ret_val); } - if (rack_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { return (ret_val); } /* * If new data are received on a connection after the user processes * are gone, then RST the other end. */ if ((so->so_state & SS_NOFDREF) && tlen) { if (rack_check_data_after_close(m, tp, &tlen, th, so)) return (1); } /* * If last ACK falls within this segment's sequence numbers, record * its timestamp. NOTE: 1) That the test incorporates suggestions * from the latest proposal of the tcplw@cray.com list (Braden * 1993/04/26). 2) That updating only on newer timestamps interferes * with our earlier PAWS tests, so this check should be solely * predicated on the sequence space of this segment. 3) That we * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + * SEG.Len, This modified check allows us to overcome RFC1323's * limitations as described in Stevens TCP/IP Illustrated Vol. 2 * p.869. In such cases, we can still calculate the RTT correctly * when RCV.NXT == Last.ACK.Sent. */ if ((to->to_flags & TOF_TS) != 0 && SEQ_LEQ(th->th_seq, tp->last_ack_sent) && SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + ((thflags & (TH_SYN | TH_FIN)) != 0))) { tp->ts_recent_age = tcp_ts_getticks(); tp->ts_recent = to->to_tsval; } /* * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag * is on (half-synchronized state), then queue data for later * processing; else drop segment and return. */ if ((thflags & TH_ACK) == 0) { if (tp->t_flags & TF_NEEDSYN) { return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } else if (tp->t_flags & TF_ACKNOW) { - rack_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ((struct tcp_rack *)tp->t_fb_ptr)->r_wanted_output++; return (ret_val); } else { - rack_do_drop(m, NULL); + ctf_do_drop(m, NULL); return (0); } } /* * Ack processing. */ if (rack_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) { return (ret_val); } if (ourfinisacked) { /* * If we can't receive any more data, then closing user can * proceed. Starting the timer is contrary to the * specification, but if we don't get a FIN we'll hang * forever. * * XXXjl: we should release the tp also, and use a * compressed state. */ if (so->so_rcv.sb_state & SBS_CANTRCVMORE) { soisdisconnected(so); tcp_timer_activate(tp, TT_2MSL, (tcp_fast_finwait2_recycle ? tcp_finwait2_timeout : TP_MAXIDLE(tp))); } tcp_state_change(tp, TCPS_FIN_WAIT_2); } if (sbavail(&so->so_snd)) { if (rack_progress_timeout_check(tp)) { tcp_set_inp_to_drop(tp->t_inpcb, ETIMEDOUT); - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return (1); } } return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } /* * Return value of 1, the TCB is unlocked and most * likely gone, return value of 0, the TCP is still * locked. */ static int rack_do_closing(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) { int32_t ret_val = 0; int32_t ourfinisacked = 0; - rack_calc_rwin(so, tp); + ctf_calc_rwin(so, tp); - if (thflags & TH_RST) - return (rack_process_rst(m, th, so, tp)); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); /* * RFC5961 Section 4.2 Send challenge ACK for any SYN in * synchronized state. */ if (thflags & TH_SYN) { - rack_challenge_ack(m, th, tp, &ret_val); + ctf_challenge_ack(m, th, tp, &ret_val); return (ret_val); } /* * RFC 1323 PAWS: If we have a timestamp reply on this segment and * it's less than ts_recent, drop it. */ if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && TSTMP_LT(to->to_tsval, tp->ts_recent)) { - if (rack_ts_check(m, th, tp, tlen, thflags, &ret_val)) + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) return (ret_val); } - if (rack_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { return (ret_val); } /* * If new data are received on a connection after the user processes * are gone, then RST the other end. */ if ((so->so_state & SS_NOFDREF) && tlen) { if (rack_check_data_after_close(m, tp, &tlen, th, so)) return (1); } /* * If last ACK falls within this segment's sequence numbers, record * its timestamp. NOTE: 1) That the test incorporates suggestions * from the latest proposal of the tcplw@cray.com list (Braden * 1993/04/26). 2) That updating only on newer timestamps interferes * with our earlier PAWS tests, so this check should be solely * predicated on the sequence space of this segment. 3) That we * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + * SEG.Len, This modified check allows us to overcome RFC1323's * limitations as described in Stevens TCP/IP Illustrated Vol. 2 * p.869. In such cases, we can still calculate the RTT correctly * when RCV.NXT == Last.ACK.Sent. */ if ((to->to_flags & TOF_TS) != 0 && SEQ_LEQ(th->th_seq, tp->last_ack_sent) && SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + ((thflags & (TH_SYN | TH_FIN)) != 0))) { tp->ts_recent_age = tcp_ts_getticks(); tp->ts_recent = to->to_tsval; } /* * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag * is on (half-synchronized state), then queue data for later * processing; else drop segment and return. */ if ((thflags & TH_ACK) == 0) { if (tp->t_flags & TF_NEEDSYN) { return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } else if (tp->t_flags & TF_ACKNOW) { - rack_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ((struct tcp_rack *)tp->t_fb_ptr)->r_wanted_output++; return (ret_val); } else { - rack_do_drop(m, NULL); + ctf_do_drop(m, NULL); return (0); } } /* * Ack processing. */ if (rack_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) { return (ret_val); } if (ourfinisacked) { INP_INFO_RLOCK_ASSERT(&V_tcbinfo); tcp_twstart(tp); m_freem(m); return (1); } if (sbavail(&so->so_snd)) { if (rack_progress_timeout_check(tp)) { tcp_set_inp_to_drop(tp->t_inpcb, ETIMEDOUT); - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return (1); } } return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } /* * Return value of 1, the TCB is unlocked and most * likely gone, return value of 0, the TCP is still * locked. */ static int rack_do_lastack(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) { int32_t ret_val = 0; int32_t ourfinisacked = 0; - rack_calc_rwin(so, tp); + ctf_calc_rwin(so, tp); - if (thflags & TH_RST) - return (rack_process_rst(m, th, so, tp)); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); /* * RFC5961 Section 4.2 Send challenge ACK for any SYN in * synchronized state. */ if (thflags & TH_SYN) { - rack_challenge_ack(m, th, tp, &ret_val); + ctf_challenge_ack(m, th, tp, &ret_val); return (ret_val); } /* * RFC 1323 PAWS: If we have a timestamp reply on this segment and * it's less than ts_recent, drop it. */ if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && TSTMP_LT(to->to_tsval, tp->ts_recent)) { - if (rack_ts_check(m, th, tp, tlen, thflags, &ret_val)) + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) return (ret_val); } - if (rack_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { return (ret_val); } /* * If new data are received on a connection after the user processes * are gone, then RST the other end. */ if ((so->so_state & SS_NOFDREF) && tlen) { if (rack_check_data_after_close(m, tp, &tlen, th, so)) return (1); } /* * If last ACK falls within this segment's sequence numbers, record * its timestamp. NOTE: 1) That the test incorporates suggestions * from the latest proposal of the tcplw@cray.com list (Braden * 1993/04/26). 2) That updating only on newer timestamps interferes * with our earlier PAWS tests, so this check should be solely * predicated on the sequence space of this segment. 3) That we * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + * SEG.Len, This modified check allows us to overcome RFC1323's * limitations as described in Stevens TCP/IP Illustrated Vol. 2 * p.869. In such cases, we can still calculate the RTT correctly * when RCV.NXT == Last.ACK.Sent. */ if ((to->to_flags & TOF_TS) != 0 && SEQ_LEQ(th->th_seq, tp->last_ack_sent) && SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + ((thflags & (TH_SYN | TH_FIN)) != 0))) { tp->ts_recent_age = tcp_ts_getticks(); tp->ts_recent = to->to_tsval; } /* * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag * is on (half-synchronized state), then queue data for later * processing; else drop segment and return. */ if ((thflags & TH_ACK) == 0) { if (tp->t_flags & TF_NEEDSYN) { return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } else if (tp->t_flags & TF_ACKNOW) { - rack_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ((struct tcp_rack *)tp->t_fb_ptr)->r_wanted_output++; return (ret_val); } else { - rack_do_drop(m, NULL); + ctf_do_drop(m, NULL); return (0); } } /* * case TCPS_LAST_ACK: Ack processing. */ if (rack_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) { return (ret_val); } if (ourfinisacked) { INP_INFO_RLOCK_ASSERT(&V_tcbinfo); tp = tcp_close(tp); - rack_do_drop(m, tp); + ctf_do_drop(m, tp); return (1); } if (sbavail(&so->so_snd)) { if (rack_progress_timeout_check(tp)) { tcp_set_inp_to_drop(tp->t_inpcb, ETIMEDOUT); - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return (1); } } return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } /* * Return value of 1, the TCB is unlocked and most * likely gone, return value of 0, the TCP is still * locked. */ static int rack_do_fin_wait_2(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, struct tcpopt *to, int32_t drop_hdrlen, int32_t tlen, uint32_t tiwin, int32_t thflags, int32_t nxt_pkt) { int32_t ret_val = 0; int32_t ourfinisacked = 0; - rack_calc_rwin(so, tp); + ctf_calc_rwin(so, tp); /* Reset receive buffer auto scaling when not in bulk receive mode. */ - if (thflags & TH_RST) - return (rack_process_rst(m, th, so, tp)); + if ((thflags & TH_RST) || + (tp->t_fin_is_rst && (thflags & TH_FIN))) + return (ctf_process_rst(m, th, so, tp)); /* * RFC5961 Section 4.2 Send challenge ACK for any SYN in * synchronized state. */ if (thflags & TH_SYN) { - rack_challenge_ack(m, th, tp, &ret_val); + ctf_challenge_ack(m, th, tp, &ret_val); return (ret_val); } /* * RFC 1323 PAWS: If we have a timestamp reply on this segment and * it's less than ts_recent, drop it. */ if ((to->to_flags & TOF_TS) != 0 && tp->ts_recent && TSTMP_LT(to->to_tsval, tp->ts_recent)) { - if (rack_ts_check(m, th, tp, tlen, thflags, &ret_val)) + if (ctf_ts_check(m, th, tp, tlen, thflags, &ret_val)) return (ret_val); } - if (rack_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { + if (ctf_drop_checks(to, m, th, tp, &tlen, &thflags, &drop_hdrlen, &ret_val)) { return (ret_val); } /* * If new data are received on a connection after the user processes * are gone, then RST the other end. */ if ((so->so_state & SS_NOFDREF) && tlen) { if (rack_check_data_after_close(m, tp, &tlen, th, so)) return (1); } /* * If last ACK falls within this segment's sequence numbers, record * its timestamp. NOTE: 1) That the test incorporates suggestions * from the latest proposal of the tcplw@cray.com list (Braden * 1993/04/26). 2) That updating only on newer timestamps interferes * with our earlier PAWS tests, so this check should be solely * predicated on the sequence space of this segment. 3) That we * modify the segment boundary check to be Last.ACK.Sent <= SEG.SEQ * + SEG.Len instead of RFC1323's Last.ACK.Sent < SEG.SEQ + * SEG.Len, This modified check allows us to overcome RFC1323's * limitations as described in Stevens TCP/IP Illustrated Vol. 2 * p.869. In such cases, we can still calculate the RTT correctly * when RCV.NXT == Last.ACK.Sent. */ if ((to->to_flags & TOF_TS) != 0 && SEQ_LEQ(th->th_seq, tp->last_ack_sent) && SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen + ((thflags & (TH_SYN | TH_FIN)) != 0))) { tp->ts_recent_age = tcp_ts_getticks(); tp->ts_recent = to->to_tsval; } /* * If the ACK bit is off: if in SYN-RECEIVED state or SENDSYN flag * is on (half-synchronized state), then queue data for later * processing; else drop segment and return. */ if ((thflags & TH_ACK) == 0) { if (tp->t_flags & TF_NEEDSYN) { return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } else if (tp->t_flags & TF_ACKNOW) { - rack_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ctf_do_dropafterack(m, tp, th, thflags, tlen, &ret_val); + ((struct tcp_rack *)tp->t_fb_ptr)->r_wanted_output++; return (ret_val); } else { - rack_do_drop(m, NULL); + ctf_do_drop(m, NULL); return (0); } } /* * Ack processing. */ if (rack_process_ack(m, th, so, tp, to, tiwin, tlen, &ourfinisacked, thflags, &ret_val)) { return (ret_val); } if (sbavail(&so->so_snd)) { if (rack_progress_timeout_check(tp)) { tcp_set_inp_to_drop(tp->t_inpcb, ETIMEDOUT); - rack_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return (1); } } return (rack_process_data(m, th, so, tp, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt)); } static void inline rack_clear_rate_sample(struct tcp_rack *rack) { rack->r_ctl.rack_rs.rs_flags = RACK_RTT_EMPTY; rack->r_ctl.rack_rs.rs_rtt_cnt = 0; rack->r_ctl.rack_rs.rs_rtt_tot = 0; } +static void +rack_set_pace_segments(struct tcpcb *tp, struct tcp_rack *rack) +{ + uint32_t tls_seg = 0; + +#ifdef KERN_TLS + if (rack->rc_inp->inp_socket->so_snd.sb_flags & SB_TLS_IFNET) { + tls_seg = ctf_get_opt_tls_size(rack->rc_inp->inp_socket, rack->rc_tp->snd_wnd); + rack->r_ctl.rc_pace_min_segs = tls_seg; + } else +#endif + rack->r_ctl.rc_pace_min_segs = ctf_fixed_maxseg(tp); + rack->r_ctl.rc_pace_max_segs = ctf_fixed_maxseg(tp) * rack->rc_pace_max_segs; + if (rack->r_ctl.rc_pace_max_segs > PACE_MAX_IP_BYTES) + rack->r_ctl.rc_pace_max_segs = PACE_MAX_IP_BYTES; +#ifdef KERN_TLS + if (tls_seg != 0) { + if (rack_hw_tls_max_seg > 1) { + rack->r_ctl.rc_pace_max_segs /= tls_seg; + if (rack_hw_tls_max_seg < rack->r_ctl.rc_pace_max_segs) + rack->r_ctl.rc_pace_max_segs = rack_hw_tls_max_seg; + } else { + rack->r_ctl.rc_pace_max_segs = 1; + } + if (rack->r_ctl.rc_pace_max_segs == 0) + rack->r_ctl.rc_pace_max_segs = 1; + rack->r_ctl.rc_pace_max_segs *= tls_seg; + } +#endif + rack_log_type_hrdwtso(tp, rack, tls_seg, rack->rc_inp->inp_socket->so_snd.sb_flags, 0, 2); +} + static int rack_init(struct tcpcb *tp) { struct tcp_rack *rack = NULL; + struct rack_sendmap *insret; tp->t_fb_ptr = uma_zalloc(rack_pcb_zone, M_NOWAIT); if (tp->t_fb_ptr == NULL) { /* * We need to allocate memory but cant. The INP and INP_INFO * locks and they are recusive (happens during setup. So a * scheme to drop the locks fails :( * */ return (ENOMEM); } memset(tp->t_fb_ptr, 0, sizeof(struct tcp_rack)); rack = (struct tcp_rack *)tp->t_fb_ptr; - TAILQ_INIT(&rack->r_ctl.rc_map); + RB_INIT(&rack->r_ctl.rc_mtree); TAILQ_INIT(&rack->r_ctl.rc_free); TAILQ_INIT(&rack->r_ctl.rc_tmap); rack->rc_tp = tp; if (tp->t_inpcb) { rack->rc_inp = tp->t_inpcb; } + tp->t_inpcb->inp_flags2 |= INP_SUPPORTS_MBUFQ; /* Probably not needed but lets be sure */ rack_clear_rate_sample(rack); rack->r_cpu = 0; rack->r_ctl.rc_reorder_fade = rack_reorder_fade; rack->rc_allow_data_af_clo = rack_ignore_data_after_close; rack->r_ctl.rc_tlp_threshold = rack_tlp_thresh; rack->rc_pace_reduce = rack_slot_reduction; + if (use_rack_cheat) + rack->use_rack_cheat = 1; if (V_tcp_delack_enabled) tp->t_delayed_ack = 1; else tp->t_delayed_ack = 0; rack->rc_pace_max_segs = rack_hptsi_segments; - rack->r_ctl.rc_early_recovery_segs = rack_early_recovery_max_seg; rack->r_ctl.rc_reorder_shift = rack_reorder_thresh; rack->r_ctl.rc_pkt_delay = rack_pkt_delay; rack->r_ctl.rc_prop_reduce = rack_use_proportional_reduce; - rack->r_idle_reduce_largest = rack_reduce_largest_on_idle; rack->r_enforce_min_pace = rack_min_pace_time; - rack->r_min_pace_seg_thresh = rack_min_pace_time_seg_req; rack->r_ctl.rc_prop_rate = rack_proportional_rate; rack->r_ctl.rc_tlp_cwnd_reduce = rack_lower_cwnd_at_tlp; rack->r_ctl.rc_early_recovery = rack_early_recovery; rack->rc_always_pace = rack_pace_every_seg; + rack_set_pace_segments(tp, rack); + rack->r_ctl.rc_high_rwnd = tp->snd_wnd; rack->r_ctl.rc_rate_sample_method = rack_rate_sample_method; rack->rack_tlp_threshold_use = rack_tlp_threshold_use; rack->r_ctl.rc_prr_sendalot = rack_send_a_lot_in_prr; rack->r_ctl.rc_min_to = rack_min_to; - rack->r_ctl.rc_prr_inc_var = rack_inc_var; + rack->rack_per_of_gp = rack_per_of_gp; + microuptime(&rack->r_ctl.rc_last_ack); + rack->r_ctl.rc_last_time_decay = rack->r_ctl.rc_last_ack; + rack->r_ctl.rc_tlp_rxt_last_time = tcp_ts_getticks(); + /* Do we force on detection? */ + if (tcp_force_detection) + rack->do_detection = 1; + else + rack->do_detection = 0; if (tp->snd_una != tp->snd_max) { /* Create a send map for the current outstanding data */ struct rack_sendmap *rsm; rsm = rack_alloc(rack); if (rsm == NULL) { uma_zfree(rack_pcb_zone, tp->t_fb_ptr); tp->t_fb_ptr = NULL; return (ENOMEM); } rsm->r_flags = RACK_OVERMAX; - rsm->r_tim_lastsent[0] = tcp_ts_getticks(); + rsm->r_tim_lastsent[0] = rack->r_ctl.rc_tlp_rxt_last_time; rsm->r_rtr_cnt = 1; rsm->r_rtr_bytes = 0; rsm->r_start = tp->snd_una; rsm->r_end = tp->snd_max; - rsm->r_sndcnt = 0; - TAILQ_INSERT_TAIL(&rack->r_ctl.rc_map, rsm, r_next); + rsm->r_dupack = 0; + insret = RB_INSERT(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); +#ifdef INVARIANTS + if (insret != NULL) { + panic("Insert in rb tree fails ret:%p rack:%p rsm:%p", + insret, rack, rsm); + } +#endif TAILQ_INSERT_TAIL(&rack->r_ctl.rc_tmap, rsm, r_tnext); rsm->r_in_tmap = 1; } rack_stop_all_timers(tp); - rack_start_hpts_timer(rack, tp, tcp_ts_getticks(), __LINE__, 0, 0, 0); + rack_start_hpts_timer(rack, tp, tcp_ts_getticks(), 0, 0, 0); return (0); } static int rack_handoff_ok(struct tcpcb *tp) { if ((tp->t_state == TCPS_CLOSED) || (tp->t_state == TCPS_LISTEN)) { /* Sure no problem though it may not stick */ return (0); } if ((tp->t_state == TCPS_SYN_SENT) || (tp->t_state == TCPS_SYN_RECEIVED)) { /* * We really don't know you have to get to ESTAB or beyond * to tell. */ return (EAGAIN); } - if (tp->t_flags & TF_SACK_PERMIT) { + if ((tp->t_flags & TF_SACK_PERMIT) || rack_sack_not_required){ return (0); } /* * If we reach here we don't do SACK on this connection so we can * never do rack. */ return (EINVAL); } static void rack_fini(struct tcpcb *tp, int32_t tcb_is_purged) { if (tp->t_fb_ptr) { struct tcp_rack *rack; - struct rack_sendmap *rsm; - + struct rack_sendmap *rsm, *nrsm, *rm; + if (tp->t_inpcb) { + tp->t_inpcb->inp_flags2 &= ~INP_SUPPORTS_MBUFQ; + tp->t_inpcb->inp_flags2 &= ~INP_MBUF_QUEUE_READY; + } rack = (struct tcp_rack *)tp->t_fb_ptr; #ifdef TCP_BLACKBOX tcp_log_flowend(tp); #endif - rsm = TAILQ_FIRST(&rack->r_ctl.rc_map); - while (rsm) { - TAILQ_REMOVE(&rack->r_ctl.rc_map, rsm, r_next); + RB_FOREACH_SAFE(rsm, rack_rb_tree_head, &rack->r_ctl.rc_mtree, nrsm) { + rm = RB_REMOVE(rack_rb_tree_head, &rack->r_ctl.rc_mtree, rsm); +#ifdef INVARIANTS + if (rm != rsm) { + panic("At fini, rack:%p rsm:%p rm:%p", + rack, rsm, rm); + } +#endif uma_zfree(rack_zone, rsm); - rsm = TAILQ_FIRST(&rack->r_ctl.rc_map); } rsm = TAILQ_FIRST(&rack->r_ctl.rc_free); while (rsm) { - TAILQ_REMOVE(&rack->r_ctl.rc_free, rsm, r_next); + TAILQ_REMOVE(&rack->r_ctl.rc_free, rsm, r_tnext); uma_zfree(rack_zone, rsm); rsm = TAILQ_FIRST(&rack->r_ctl.rc_free); } rack->rc_free_cnt = 0; uma_zfree(rack_pcb_zone, tp->t_fb_ptr); tp->t_fb_ptr = NULL; } /* Make sure snd_nxt is correctly set */ tp->snd_nxt = tp->snd_max; } + static void rack_set_state(struct tcpcb *tp, struct tcp_rack *rack) { switch (tp->t_state) { case TCPS_SYN_SENT: rack->r_state = TCPS_SYN_SENT; rack->r_substate = rack_do_syn_sent; break; case TCPS_SYN_RECEIVED: rack->r_state = TCPS_SYN_RECEIVED; rack->r_substate = rack_do_syn_recv; break; case TCPS_ESTABLISHED: + rack_set_pace_segments(tp, rack); rack->r_state = TCPS_ESTABLISHED; rack->r_substate = rack_do_established; break; case TCPS_CLOSE_WAIT: rack->r_state = TCPS_CLOSE_WAIT; rack->r_substate = rack_do_close_wait; break; case TCPS_FIN_WAIT_1: rack->r_state = TCPS_FIN_WAIT_1; rack->r_substate = rack_do_fin_wait_1; break; case TCPS_CLOSING: rack->r_state = TCPS_CLOSING; rack->r_substate = rack_do_closing; break; case TCPS_LAST_ACK: rack->r_state = TCPS_LAST_ACK; rack->r_substate = rack_do_lastack; break; case TCPS_FIN_WAIT_2: rack->r_state = TCPS_FIN_WAIT_2; rack->r_substate = rack_do_fin_wait_2; break; case TCPS_LISTEN: case TCPS_CLOSED: case TCPS_TIME_WAIT: default: break; }; } static void rack_timer_audit(struct tcpcb *tp, struct tcp_rack *rack, struct sockbuf *sb) { /* * We received an ack, and then did not * call send or were bounced out due to the * hpts was running. Now a timer is up as well, is * it the right timer? */ struct rack_sendmap *rsm; int tmr_up; tmr_up = rack->r_ctl.rc_hpts_flags & PACE_TMR_MASK; if (rack->rc_in_persist && (tmr_up == PACE_TMR_PERSIT)) return; rsm = TAILQ_FIRST(&rack->r_ctl.rc_tmap); if (((rsm == NULL) || (tp->t_state < TCPS_ESTABLISHED)) && (tmr_up == PACE_TMR_RXT)) { /* Should be an RXT */ return; } if (rsm == NULL) { /* Nothing outstanding? */ if (tp->t_flags & TF_DELACK) { if (tmr_up == PACE_TMR_DELACK) /* We are supposed to have delayed ack up and we do */ return; } else if (sbavail(&tp->t_inpcb->inp_socket->so_snd) && (tmr_up == PACE_TMR_RXT)) { /* * if we hit enobufs then we would expect the possiblity * of nothing outstanding and the RXT up (and the hptsi timer). */ return; } else if (((tcp_always_keepalive || rack->rc_inp->inp_socket->so_options & SO_KEEPALIVE) && (tp->t_state <= TCPS_CLOSING)) && (tmr_up == PACE_TMR_KEEP) && (tp->snd_max == tp->snd_una)) { /* We should have keep alive up and we do */ return; } } - if (rsm && (rsm->r_flags & RACK_SACK_PASSED)) { - if ((tp->t_flags & TF_SENTFIN) && - ((tp->snd_max - tp->snd_una) == 1) && - (rsm->r_flags & RACK_HAS_FIN)) { - /* needs to be a RXT */ - if (tmr_up == PACE_TMR_RXT) - return; - } else if (tmr_up == PACE_TMR_RACK) - return; - } else if (SEQ_GT(tp->snd_max,tp->snd_una) && + if (SEQ_GT(tp->snd_max, tp->snd_una) && ((tmr_up == PACE_TMR_TLP) || + (tmr_up == PACE_TMR_RACK) || (tmr_up == PACE_TMR_RXT))) { /* - * Either a TLP or RXT is fine if no sack-passed - * is in place and data is outstanding. + * Either a Rack, TLP or RXT is fine if we + * have outstanding data. */ return; } else if (tmr_up == PACE_TMR_DELACK) { /* * If the delayed ack was going to go off * before the rtx/tlp/rack timer were going to * expire, then that would be the timer in control. * Note we don't check the time here trusting the * code is correct. */ return; } /* * Ok the timer originally started is not what we want now. * We will force the hpts to be stopped if any, and restart * with the slot set to what was in the saved slot. */ rack_timer_cancel(tp, rack, rack->r_ctl.rc_rcvtime, __LINE__); - rack_start_hpts_timer(rack, tp, tcp_ts_getticks(), __LINE__, 0, 0, 0); + rack_start_hpts_timer(rack, tp, tcp_ts_getticks(), 0, 0, 0); } -static void -rack_hpts_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, +static int +rack_do_segment_nounlock(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, int32_t drop_hdrlen, int32_t tlen, uint8_t iptos, int32_t nxt_pkt, struct timeval *tv) { int32_t thflags, retval, did_out = 0; int32_t way_out = 0; uint32_t cts; uint32_t tiwin; struct tcpopt to; struct tcp_rack *rack; struct rack_sendmap *rsm; int32_t prev_state = 0; + if (m->m_flags & M_TSTMP_LRO) { + tv->tv_sec = m->m_pkthdr.rcv_tstmp /1000000000; + tv->tv_usec = (m->m_pkthdr.rcv_tstmp % 1000000000)/1000; + } cts = tcp_tv_to_mssectick(tv); rack = (struct tcp_rack *)tp->t_fb_ptr; kern_prefetch(rack, &prev_state); prev_state = 0; thflags = th->th_flags; /* * If this is either a state-changing packet or current state isn't * established, we require a read lock on tcbinfo. Otherwise, we * allow the tcbinfo to be in either locked or unlocked, as the * caller may have unnecessarily acquired a lock due to a race. */ + if ((thflags & (TH_SYN | TH_FIN | TH_RST)) != 0 || + tp->t_state != TCPS_ESTABLISHED) { + INP_INFO_RLOCK_ASSERT(&V_tcbinfo); + } INP_WLOCK_ASSERT(tp->t_inpcb); KASSERT(tp->t_state > TCPS_LISTEN, ("%s: TCPS_LISTEN", __func__)); KASSERT(tp->t_state != TCPS_TIME_WAIT, ("%s: TCPS_TIME_WAIT", __func__)); - { + if (tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.inhpts = rack->rc_inp->inp_in_hpts; log.u_bbr.ininput = rack->rc_inp->inp_in_input; + log.u_bbr.flex1 = rack->r_ctl.rc_prr_sndcnt; log.u_bbr.flex2 = rack->r_ctl.rc_num_maps_alloced; - TCP_LOG_EVENT(tp, th, &so->so_rcv, &so->so_snd, TCP_LOG_IN, 0, - tlen, &log, true); + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); + log.u_bbr.pkts_out = rack->rc_tp->t_maxseg; + TCP_LOG_EVENTP(tp, th, &so->so_rcv, &so->so_snd, TCP_LOG_IN, 0, + tlen, &log, true, &tv); } + if ((thflags & TH_SYN) && (thflags & TH_FIN) && V_drop_synfin) { + way_out = 4; + retval = 0; + goto done_with_input; + } /* + * If a segment with the ACK-bit set arrives in the SYN-SENT state + * check SEQ.ACK first as described on page 66 of RFC 793, section 3.9. + */ + if ((tp->t_state == TCPS_SYN_SENT) && (thflags & TH_ACK) && + (SEQ_LEQ(th->th_ack, tp->iss) || SEQ_GT(th->th_ack, tp->snd_max))) { + ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); + return(1); + } + /* * Segment received on connection. Reset idle time and keep-alive * timer. XXX: This should be done after segment validation to * ignore broken/spoofed segs. */ - if (tp->t_idle_reduce && (tp->snd_max == tp->snd_una)) { - if ((ticks - tp->t_rcvtime) >= tp->t_rxtcur) { - counter_u64_add(rack_input_idle_reduces, 1); - rack_cc_after_idle(tp, - (rack->r_idle_reduce_largest ? 1 :0)); - } + if (tp->t_idle_reduce && + (tp->snd_max == tp->snd_una) && + ((ticks - tp->t_rcvtime) >= tp->t_rxtcur)) { + counter_u64_add(rack_input_idle_reduces, 1); + rack_cc_after_idle(tp); } - rack->r_ctl.rc_rcvtime = cts; tp->t_rcvtime = ticks; /* * Unscale the window into a 32-bit value. For the SYN_SENT state * the scale is zero. */ tiwin = th->th_win << tp->snd_scale; #ifdef NETFLIX_STATS stats_voi_update_abs_ulong(tp->t_stats, VOI_TCP_FRWIN, tiwin); #endif + if (tiwin > rack->r_ctl.rc_high_rwnd) + rack->r_ctl.rc_high_rwnd = tiwin; /* * TCP ECN processing. XXXJTL: If we ever use ECN, we need to move * this to occur after we've validated the segment. */ if (tp->t_flags & TF_ECN_PERMIT) { if (thflags & TH_CWR) tp->t_flags &= ~TF_ECN_SND_ECE; switch (iptos & IPTOS_ECN_MASK) { case IPTOS_ECN_CE: tp->t_flags |= TF_ECN_SND_ECE; TCPSTAT_INC(tcps_ecn_ce); break; case IPTOS_ECN_ECT0: TCPSTAT_INC(tcps_ecn_ect0); break; case IPTOS_ECN_ECT1: TCPSTAT_INC(tcps_ecn_ect1); break; } /* Congestion experienced. */ if (thflags & TH_ECE) { rack_cong_signal(tp, th, CC_ECN); } } /* * Parse options on any incoming segment. */ tcp_dooptions(&to, (u_char *)(th + 1), (th->th_off << 2) - sizeof(struct tcphdr), (thflags & TH_SYN) ? TO_SYN : 0); /* * If echoed timestamp is later than the current time, fall back to * non RFC1323 RTT calculation. Normalize timestamp if syncookies * were used when this connection was established. */ if ((to.to_flags & TOF_TS) && (to.to_tsecr != 0)) { to.to_tsecr -= tp->ts_offset; if (TSTMP_GT(to.to_tsecr, cts)) to.to_tsecr = 0; } /* * If its the first time in we need to take care of options and * verify we can do SACK for rack! */ if (rack->r_state == 0) { /* Should be init'd by rack_init() */ KASSERT(rack->rc_inp != NULL, ("%s: rack->rc_inp unexpectedly NULL", __func__)); if (rack->rc_inp == NULL) { rack->rc_inp = tp->t_inpcb; } /* * Process options only when we get SYN/ACK back. The SYN * case for incoming connections is handled in tcp_syncache. * According to RFC1323 the window field in a SYN (i.e., a * or ) segment itself is never scaled. XXX * this is traditional behavior, may need to be cleaned up. */ rack->r_cpu = inp_to_cpuid(tp->t_inpcb); if (tp->t_state == TCPS_SYN_SENT && (thflags & TH_SYN)) { if ((to.to_flags & TOF_SCALE) && (tp->t_flags & TF_REQ_SCALE)) { tp->t_flags |= TF_RCVD_SCALE; tp->snd_scale = to.to_wscale; } /* * Initial send window. It will be updated with the * next incoming segment to the scaled value. */ tp->snd_wnd = th->th_win; if (to.to_flags & TOF_TS) { tp->t_flags |= TF_RCVD_TSTMP; tp->ts_recent = to.to_tsval; tp->ts_recent_age = cts; } if (to.to_flags & TOF_MSS) tcp_mss(tp, to.to_mss); if ((tp->t_flags & TF_SACK_PERMIT) && (to.to_flags & TOF_SACKPERM) == 0) tp->t_flags &= ~TF_SACK_PERMIT; + if (IS_FASTOPEN(tp->t_flags)) { + if (to.to_flags & TOF_FASTOPEN) { + uint16_t mss; + + if (to.to_flags & TOF_MSS) + mss = to.to_mss; + else + if ((tp->t_inpcb->inp_vflag & INP_IPV6) != 0) + mss = TCP6_MSS; + else + mss = TCP_MSS; + tcp_fastopen_update_cache(tp, mss, + to.to_tfo_len, to.to_tfo_cookie); + } else + tcp_fastopen_disable_path(tp); + } } /* * At this point we are at the initial call. Here we decide * if we are doing RACK or not. We do this by seeing if * TF_SACK_PERMIT is set, if not rack is *not* possible and * we switch to the default code. */ if ((tp->t_flags & TF_SACK_PERMIT) == 0) { tcp_switch_back_to_default(tp); (*tp->t_fb->tfb_tcp_do_segment) (m, th, so, tp, drop_hdrlen, tlen, iptos); - return; + return (1); } /* Set the flag */ rack->r_is_v6 = (tp->t_inpcb->inp_vflag & INP_IPV6) != 0; tcp_set_hpts(tp->t_inpcb); sack_filter_clear(&rack->r_ctl.rack_sf, th->th_ack); } /* * This is the one exception case where we set the rack state * always. All other times (timers etc) we must have a rack-state * set (so we assure we have done the checks above for SACK). */ + memcpy(&rack->r_ctl.rc_last_ack, tv, sizeof(struct timeval)); + rack->r_ctl.rc_rcvtime = cts; if (rack->r_state != tp->t_state) rack_set_state(tp, rack); - if (SEQ_GT(th->th_ack, tp->snd_una) && (rsm = TAILQ_FIRST(&rack->r_ctl.rc_map)) != NULL) + if (SEQ_GT(th->th_ack, tp->snd_una) && + (rsm = RB_MIN(rack_rb_tree_head, &rack->r_ctl.rc_mtree)) != NULL) kern_prefetch(rsm, &prev_state); prev_state = rack->r_state; rack->r_ctl.rc_tlp_send_cnt = 0; rack_clear_rate_sample(rack); retval = (*rack->r_substate) (m, th, so, tp, &to, drop_hdrlen, tlen, tiwin, thflags, nxt_pkt); #ifdef INVARIANTS if ((retval == 0) && (tp->t_inpcb == NULL)) { panic("retval:%d tp:%p t_inpcb:NULL state:%d", retval, tp, prev_state); } #endif if (retval == 0) { /* * If retval is 1 the tcb is unlocked and most likely the tp * is gone. */ INP_WLOCK_ASSERT(tp->t_inpcb); + if (rack->set_pacing_done_a_iw == 0) { + /* How much has been acked? */ + if ((tp->snd_una - tp->iss) > (ctf_fixed_maxseg(tp) * 10)) { + /* We have enough to set in the pacing segment size */ + rack->set_pacing_done_a_iw = 1; + rack_set_pace_segments(tp, rack); + } + } tcp_rack_xmit_timer_commit(rack, tp); - if (nxt_pkt == 0) { + if ((nxt_pkt == 0) || (IN_RECOVERY(tp->t_flags))) { if (rack->r_wanted_output != 0) { did_out = 1; (void)tp->t_fb->tfb_tcp_output(tp); } - rack_start_hpts_timer(rack, tp, cts, __LINE__, 0, 0, 0); + rack_start_hpts_timer(rack, tp, cts, 0, 0, 0); } - if (((rack->r_ctl.rc_hpts_flags & PACE_TMR_MASK) == 0) && + if ((nxt_pkt == 0) && + ((rack->r_ctl.rc_hpts_flags & PACE_TMR_MASK) == 0) && (SEQ_GT(tp->snd_max, tp->snd_una) || (tp->t_flags & TF_DELACK) || ((tcp_always_keepalive || rack->rc_inp->inp_socket->so_options & SO_KEEPALIVE) && (tp->t_state <= TCPS_CLOSING)))) { /* We could not send (probably in the hpts but stopped the timer earlier)? */ if ((tp->snd_max == tp->snd_una) && ((tp->t_flags & TF_DELACK) == 0) && + (rack->rc_inp->inp_in_hpts) && (rack->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT)) { /* keep alive not needed if we are hptsi output yet */ ; } else { - if (rack->rc_inp->inp_in_hpts) + if (rack->rc_inp->inp_in_hpts) { tcp_hpts_remove(rack->rc_inp, HPTS_REMOVE_OUTPUT); - rack_start_hpts_timer(rack, tp, tcp_ts_getticks(), __LINE__, 0, 0, 0); + counter_u64_add(rack_per_timer_hole, 1); + } + rack_start_hpts_timer(rack, tp, tcp_ts_getticks(), 0, 0, 0); } way_out = 1; - } else { + } else if (nxt_pkt == 0) { /* Do we have the correct timer running? */ rack_timer_audit(tp, rack, &so->so_snd); way_out = 2; } + done_with_input: rack_log_doseg_done(rack, cts, nxt_pkt, did_out, way_out); if (did_out) rack->r_wanted_output = 0; #ifdef INVARIANTS if (tp->t_inpcb == NULL) { panic("OP:%d retval:%d tp:%p t_inpcb:NULL state:%d", did_out, retval, tp, prev_state); } #endif - INP_WUNLOCK(tp->t_inpcb); } + return (retval); } void rack_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp, int32_t drop_hdrlen, int32_t tlen, uint8_t iptos) { struct timeval tv; -#ifdef RSS - struct tcp_function_block *tfb; - struct tcp_rack *rack; - struct inpcb *inp; - rack = (struct tcp_rack *)tp->t_fb_ptr; - if (rack->r_state == 0) { - /* - * Initial input (ACK to SYN-ACK etc)lets go ahead and get - * it processed - */ + /* First lets see if we have old packets */ + if (tp->t_in_pkt) { + if (ctf_do_queued_segments(so, tp, 1)) { + m_freem(m); + return; + } + } + if (m->m_flags & M_TSTMP_LRO) { + tv.tv_sec = m->m_pkthdr.rcv_tstmp /1000000000; + tv.tv_usec = (m->m_pkthdr.rcv_tstmp % 1000000000)/1000; + } else { + /* Should not be should we kassert instead? */ tcp_get_usecs(&tv); - rack_hpts_do_segment(m, th, so, tp, drop_hdrlen, - tlen, iptos, 0, &tv); - return; } - tcp_queue_to_input(tp, m, th, tlen, drop_hdrlen, iptos); - INP_WUNLOCK(tp->t_inpcb); -#else - tcp_get_usecs(&tv); - rack_hpts_do_segment(m, th, so, tp, drop_hdrlen, - tlen, iptos, 0, &tv); -#endif + if(rack_do_segment_nounlock(m, th, so, tp, + drop_hdrlen, tlen, iptos, 0, &tv) == 0) + INP_WUNLOCK(tp->t_inpcb); } struct rack_sendmap * tcp_rack_output(struct tcpcb *tp, struct tcp_rack *rack, uint32_t tsused) { struct rack_sendmap *rsm = NULL; int32_t idx; - uint32_t srtt_cur, srtt = 0, thresh = 0, ts_low = 0; + uint32_t srtt = 0, thresh = 0, ts_low = 0; /* Return the next guy to be re-transmitted */ - if (TAILQ_EMPTY(&rack->r_ctl.rc_map)) { + if (RB_EMPTY(&rack->r_ctl.rc_mtree)) { return (NULL); } if (tp->t_flags & TF_SENTFIN) { /* retran the end FIN? */ return (NULL); } /* ok lets look at this one */ rsm = TAILQ_FIRST(&rack->r_ctl.rc_tmap); if (rsm && ((rsm->r_flags & RACK_ACKED) == 0)) { goto check_it; } rsm = rack_find_lowest_rsm(rack); if (rsm == NULL) { return (NULL); } check_it: - srtt_cur = tp->t_srtt >> TCP_RTT_SHIFT; - srtt = TICKS_2_MSEC(srtt_cur); - if (rack->rc_rack_rtt && (srtt > rack->rc_rack_rtt)) - srtt = rack->rc_rack_rtt; if (rsm->r_flags & RACK_ACKED) { return (NULL); } if ((rsm->r_flags & RACK_SACK_PASSED) == 0) { /* Its not yet ready */ return (NULL); } + srtt = rack_grab_rtt(tp, rack); idx = rsm->r_rtr_cnt - 1; ts_low = rsm->r_tim_lastsent[idx]; thresh = rack_calc_thresh_rack(rack, srtt, tsused); - if (tsused <= ts_low) { + if ((tsused == ts_low) || + (TSTMP_LT(tsused, ts_low))) { + /* No time since sending */ return (NULL); } - if ((tsused - ts_low) >= thresh) { + if ((tsused - ts_low) < thresh) { + /* It has not been long enough yet */ + return (NULL); + } + if ((rsm->r_dupack >= DUP_ACK_THRESHOLD) || + ((rsm->r_flags & RACK_SACK_PASSED) && + (rack->sack_attack_disable == 0))) { + /* + * We have passed the dup-ack threshold + * a SACK has indicated this is missing. + * Note that if you are a declared attacker + * it is only the dup-ack threshold that + * will cause retransmits. + */ + /* log retransmit reason */ + rack_log_retran_reason(rack, rsm, (tsused - ts_low), thresh, 1); return (rsm); } return (NULL); } +static int32_t +rack_get_pacing_delay(struct tcp_rack *rack, struct tcpcb *tp, uint32_t len) +{ + int32_t slot = 0; + + if ((rack->rack_per_of_gp == 0) || + (rack->rc_always_pace == 0)) { + /* + * We use the most optimistic possible cwnd/srtt for + * sending calculations. This will make our + * calculation anticipate getting more through + * quicker then possible. But thats ok we don't want + * the peer to have a gap in data sending. + */ + uint32_t srtt, cwnd, tr_perms = 0; + +old_method: + if (rack->r_ctl.rc_rack_min_rtt) + srtt = rack->r_ctl.rc_rack_min_rtt; + else + srtt = TICKS_2_MSEC((tp->t_srtt >> TCP_RTT_SHIFT)); + if (rack->r_ctl.rc_rack_largest_cwnd) + cwnd = rack->r_ctl.rc_rack_largest_cwnd; + else + cwnd = tp->snd_cwnd; + tr_perms = cwnd / srtt; + if (tr_perms == 0) { + tr_perms = ctf_fixed_maxseg(tp); + } + /* + * Calculate how long this will take to drain, if + * the calculation comes out to zero, thats ok we + * will use send_a_lot to possibly spin around for + * more increasing tot_len_this_send to the point + * that its going to require a pace, or we hit the + * cwnd. Which in that case we are just waiting for + * a ACK. + */ + slot = len / tr_perms; + /* Now do we reduce the time so we don't run dry? */ + if (slot && rack->rc_pace_reduce) { + int32_t reduce; + + reduce = (slot / rack->rc_pace_reduce); + if (reduce < slot) { + slot -= reduce; + } else + slot = 0; + } + } else { + int cnt; + uint64_t bw_est, bw_raise, res, lentim; + + bw_est = 0; + for (cnt=0; cntr_ctl.rc_gp_hist_filled == 0) && + (rack->r_ctl.rc_gp_history[cnt] == 0)) + break; + bw_est += rack->r_ctl.rc_gp_history[cnt]; + } + if (bw_est == 0) { + /* + * No way yet to make a b/w estimate + * (no goodput est yet). + */ + goto old_method; + } + /* Covert to bytes per second */ + bw_est *= MSEC_IN_SECOND; + /* + * Now ratchet it up by our percentage. Note + * that the minimum you can do is 1 which would + * get you 101% of the average last N goodput estimates. + * The max you can do is 256 which would yeild you + * 356% of the last N goodput estimates. + */ + bw_raise = bw_est * (uint64_t)rack->rack_per_of_gp; + bw_est += bw_raise; + /* average by the number we added */ + bw_est /= cnt; + /* Now calculate a rate based on this b/w */ + lentim = (uint64_t) len * (uint64_t)MSEC_IN_SECOND; + res = lentim / bw_est; + slot = (uint32_t)res; + } + if (rack->r_enforce_min_pace && + (slot == 0)) { + /* We are enforcing a minimum pace time of 1ms */ + slot = rack->r_enforce_min_pace; + } + if (slot) + counter_u64_add(rack_calc_nonzero, 1); + else + counter_u64_add(rack_calc_zero, 1); + return (slot); +} + static int rack_output(struct tcpcb *tp) { struct socket *so; uint32_t recwin, sendwin; uint32_t sb_offset; int32_t len, flags, error = 0; struct mbuf *m; struct mbuf *mb; uint32_t if_hw_tsomaxsegcount = 0; uint32_t if_hw_tsomaxsegsize; + int32_t maxseg; long tot_len_this_send = 0; struct ip *ip = NULL; #ifdef TCPDEBUG struct ipovly *ipov = NULL; #endif -#ifdef NETFLIX_TCP_O_UDP struct udphdr *udp = NULL; -#endif struct tcp_rack *rack; struct tcphdr *th; uint8_t pass = 0; + uint8_t wanted_cookie = 0; u_char opt[TCP_MAXOLEN]; - unsigned ipoptlen, optlen, hdrlen; -#ifdef NETFLIX_TCP_O_UDP - unsigned ulen; -#endif + unsigned ipoptlen, optlen, hdrlen, ulen=0; uint32_t rack_seq; #if defined(IPSEC) || defined(IPSEC_SUPPORT) unsigned ipsec_optlen = 0; #endif int32_t idle, sendalot; int32_t sub_from_prr = 0; volatile int32_t sack_rxmit; struct rack_sendmap *rsm = NULL; - int32_t tso, mtu, would_have_fin = 0; + int32_t tso, mtu; struct tcpopt to; int32_t slot = 0; + int32_t sup_rack = 0; uint32_t cts; - uint8_t hpts_calling, doing_tlp = 0; + uint8_t hpts_calling, new_data_tlp = 0, doing_tlp = 0; int32_t do_a_prefetch; int32_t prefetch_rsm = 0; + int force_tso = 0; + int32_t orig_len; int32_t prefetch_so_done = 0; struct tcp_log_buffer *lgb = NULL; struct inpcb *inp; struct sockbuf *sb; #ifdef INET6 struct ip6_hdr *ip6 = NULL; int32_t isipv6; #endif -#ifdef KERN_TLS - const bool hw_tls = (so->so_snd.sb_flags & SB_TLS_IFNET) != 0; -#else - const bool hw_tls = false; -#endif + uint8_t filled_all = 0; + bool hw_tls = false; /* setup and take the cache hits here */ rack = (struct tcp_rack *)tp->t_fb_ptr; inp = rack->rc_inp; so = inp->inp_socket; sb = &so->so_snd; kern_prefetch(sb, &do_a_prefetch); do_a_prefetch = 1; + +#ifdef KERN_TLS + hw_tls = (so->so_snd.sb_flags & SB_TLS_IFNET) != 0; +#endif INP_WLOCK_ASSERT(inp); #ifdef TCP_OFFLOAD if (tp->t_flags & TF_TOE) return (tcp_offload_output(tp)); #endif - -#ifdef TCP_RFC7413 + maxseg = ctf_fixed_maxseg(tp); /* * For TFO connections in SYN_RECEIVED, only allow the initial * SYN|ACK and those sent by the retransmit timer. */ - if ((tp->t_flags & TF_FASTOPEN) && + if (IS_FASTOPEN(tp->t_flags) && (tp->t_state == TCPS_SYN_RECEIVED) && - SEQ_GT(tp->snd_max, tp->snd_una) && /* inital SYN|ACK sent */ - (tp->snd_nxt != tp->snd_una)) /* not a retransmit */ + SEQ_GT(tp->snd_max, tp->snd_una) && /* initial SYN|ACK sent */ + (rack->r_ctl.rc_resend == NULL)) /* not a retransmit */ return (0); -#endif #ifdef INET6 if (rack->r_state) { /* Use the cache line loaded if possible */ isipv6 = rack->r_is_v6; } else { isipv6 = (inp->inp_vflag & INP_IPV6) != 0; } #endif cts = tcp_ts_getticks(); if (((rack->r_ctl.rc_hpts_flags & PACE_PKT_OUTPUT) == 0) && inp->inp_in_hpts) { /* * We are on the hpts for some timer but not hptsi output. * Remove from the hpts unconditionally. */ rack_timer_cancel(tp, rack, cts, __LINE__); } /* Mark that we have called rack_output(). */ if ((rack->r_timer_override) || (tp->t_flags & TF_FORCEDATA) || (tp->t_state < TCPS_ESTABLISHED)) { if (tp->t_inpcb->inp_in_hpts) tcp_hpts_remove(tp->t_inpcb, HPTS_REMOVE_OUTPUT); } else if (tp->t_inpcb->inp_in_hpts) { /* * On the hpts you can't pass even if ACKNOW is on, we will * when the hpts fires. */ counter_u64_add(rack_out_size[TCP_MSS_ACCT_INPACE], 1); return (0); } hpts_calling = inp->inp_hpts_calls; inp->inp_hpts_calls = 0; if (rack->r_ctl.rc_hpts_flags & PACE_TMR_MASK) { if (rack_process_timers(tp, rack, cts, hpts_calling)) { counter_u64_add(rack_out_size[TCP_MSS_ACCT_ATIMER], 1); return (0); } } rack->r_wanted_output = 0; rack->r_timer_override = 0; /* + * For TFO connections in SYN_SENT or SYN_RECEIVED, + * only allow the initial SYN or SYN|ACK and those sent + * by the retransmit timer. + */ + if (IS_FASTOPEN(tp->t_flags) && + ((tp->t_state == TCPS_SYN_RECEIVED) || + (tp->t_state == TCPS_SYN_SENT)) && + SEQ_GT(tp->snd_max, tp->snd_una) && /* initial SYN or SYN|ACK sent */ + (tp->t_rxtshift == 0)) /* not a retransmit */ + return (0); + /* * Determine length of data that should be transmitted, and flags * that will be used. If there is some data or critical controls * (SYN, RST) to send, then transmit; otherwise, investigate * further. */ idle = (tp->t_flags & TF_LASTIDLE) || (tp->snd_max == tp->snd_una); if (tp->t_idle_reduce) { if (idle && ((ticks - tp->t_rcvtime) >= tp->t_rxtcur)) - rack_cc_after_idle(tp, - (rack->r_idle_reduce_largest ? 1 :0)); + rack_cc_after_idle(tp); } tp->t_flags &= ~TF_LASTIDLE; if (idle) { if (tp->t_flags & TF_MORETOCOME) { tp->t_flags |= TF_LASTIDLE; idle = 0; } } again: /* * If we've recently taken a timeout, snd_max will be greater than * snd_nxt. There may be SACK information that allows us to avoid * resending already delivered data. Adjust snd_nxt accordingly. */ sendalot = 0; cts = tcp_ts_getticks(); tso = 0; mtu = 0; sb_offset = tp->snd_max - tp->snd_una; sendwin = min(tp->snd_wnd, tp->snd_cwnd); flags = tcp_outflags[tp->t_state]; - /* - * Send any SACK-generated retransmissions. If we're explicitly - * trying to send out new data (when sendalot is 1), bypass this - * function. If we retransmit in fast recovery mode, decrement - * snd_cwnd, since we're replacing a (future) new transmission with - * a retransmission now, and we previously incremented snd_cwnd in - * tcp_input(). - */ - /* - * Still in sack recovery , reset rxmit flag to zero. - */ while (rack->rc_free_cnt < rack_free_cache) { rsm = rack_alloc(rack); if (rsm == NULL) { if (inp->inp_hpts_calls) /* Retry in a ms */ slot = 1; goto just_return_nolock; } - TAILQ_INSERT_TAIL(&rack->r_ctl.rc_free, rsm, r_next); + TAILQ_INSERT_TAIL(&rack->r_ctl.rc_free, rsm, r_tnext); rack->rc_free_cnt++; rsm = NULL; } if (inp->inp_hpts_calls) inp->inp_hpts_calls = 0; sack_rxmit = 0; len = 0; rsm = NULL; if (flags & TH_RST) { SOCKBUF_LOCK(sb); goto send; } if (rack->r_ctl.rc_tlpsend) { /* Tail loss probe */ long cwin; long tlen; doing_tlp = 1; - rsm = rack->r_ctl.rc_tlpsend; + /* + * Check if we can do a TLP with a RACK'd packet + * this can happen if we are not doing the rack + * cheat and we skipped to a TLP and it + * went off. + */ + rsm = tcp_rack_output(tp, rack, cts); + if (rsm == NULL) + rsm = rack->r_ctl.rc_tlpsend; rack->r_ctl.rc_tlpsend = NULL; sack_rxmit = 1; tlen = rsm->r_end - rsm->r_start; - if (tlen > tp->t_maxseg) - tlen = tp->t_maxseg; -#ifdef INVARIANTS - if (SEQ_GT(tp->snd_una, rsm->r_start)) { - panic("tp:%p rack:%p snd_una:%u rsm:%p r_start:%u", - tp, rack, tp->snd_una, rsm, rsm->r_start); - } -#endif + if (tlen > ctf_fixed_maxseg(tp)) + tlen = ctf_fixed_maxseg(tp); + KASSERT(SEQ_LEQ(tp->snd_una, rsm->r_start), + ("%s:%d: r.start:%u < SND.UNA:%u; tp:%p, rack:%p, rsm:%p", + __func__, __LINE__, + rsm->r_start, tp->snd_una, tp, rack, rsm)); sb_offset = rsm->r_start - tp->snd_una; cwin = min(tp->snd_wnd, tlen); len = cwin; } else if (rack->r_ctl.rc_resend) { /* Retransmit timer */ rsm = rack->r_ctl.rc_resend; rack->r_ctl.rc_resend = NULL; len = rsm->r_end - rsm->r_start; sack_rxmit = 1; sendalot = 0; + KASSERT(SEQ_LEQ(tp->snd_una, rsm->r_start), + ("%s:%d: r.start:%u < SND.UNA:%u; tp:%p, rack:%p, rsm:%p", + __func__, __LINE__, + rsm->r_start, tp->snd_una, tp, rack, rsm)); sb_offset = rsm->r_start - tp->snd_una; - if (len >= tp->t_maxseg) { - len = tp->t_maxseg; + if (len >= ctf_fixed_maxseg(tp)) { + len = ctf_fixed_maxseg(tp); } - KASSERT(sb_offset >= 0, ("%s: sack block to the left of una : %d", - __func__, sb_offset)); } else if ((rack->rc_in_persist == 0) && ((rsm = tcp_rack_output(tp, rack, cts)) != NULL)) { - long tlen; + int maxseg; + maxseg = ctf_fixed_maxseg(tp); if ((!IN_RECOVERY(tp->t_flags)) && ((tp->t_flags & (TF_WASFRECOVERY | TF_WASCRECOVERY)) == 0)) { /* Enter recovery if not induced by a time-out */ rack->r_ctl.rc_rsm_start = rsm->r_start; rack->r_ctl.rc_cwnd_at = tp->snd_cwnd; rack->r_ctl.rc_ssthresh_at = tp->snd_ssthresh; rack_cong_signal(tp, NULL, CC_NDUPACK); /* * When we enter recovery we need to assure we send * one packet. */ - rack->r_ctl.rc_prr_sndcnt = tp->t_maxseg; + rack->r_ctl.rc_prr_sndcnt = ctf_fixed_maxseg(tp); + rack_log_to_prr(rack, 13); } #ifdef INVARIANTS if (SEQ_LT(rsm->r_start, tp->snd_una)) { panic("Huh, tp:%p rack:%p rsm:%p start:%u < snd_una:%u\n", tp, rack, rsm, rsm->r_start, tp->snd_una); } #endif - tlen = rsm->r_end - rsm->r_start; + len = rsm->r_end - rsm->r_start; + KASSERT(SEQ_LEQ(tp->snd_una, rsm->r_start), + ("%s:%d: r.start:%u < SND.UNA:%u; tp:%p, rack:%p, rsm:%p", + __func__, __LINE__, + rsm->r_start, tp->snd_una, tp, rack, rsm)); sb_offset = rsm->r_start - tp->snd_una; - if (tlen > rack->r_ctl.rc_prr_sndcnt) { - len = rack->r_ctl.rc_prr_sndcnt; - } else { - len = tlen; - } - if (len >= tp->t_maxseg) { - sendalot = 1; - len = tp->t_maxseg; - } else { - sendalot = 0; - if ((rack->rc_timer_up == 0) && - (len < tlen)) { + /* Can we send it within the PRR boundary? */ + if ((rack->use_rack_cheat == 0) && (len > rack->r_ctl.rc_prr_sndcnt)) { + /* It does not fit */ + if ((ctf_flight_size(tp, rack->r_ctl.rc_sacked) > len) && + (rack->r_ctl.rc_prr_sndcnt < maxseg)) { /* - * If its not a timer don't send a partial - * segment. + * prr is less than a segment, we + * have more acks due in besides + * what we need to resend. Lets not send + * to avoid sending small pieces of + * what we need to retransmit. */ len = 0; goto just_return_nolock; } + len = rack->r_ctl.rc_prr_sndcnt; } - KASSERT(sb_offset >= 0, ("%s: sack block to the left of una : %d", - __func__, sb_offset)); + sendalot = 0; + if (len >= maxseg) { + len = maxseg; + } if (len > 0) { sub_from_prr = 1; sack_rxmit = 1; TCPSTAT_INC(tcps_sack_rexmits); TCPSTAT_ADD(tcps_sack_rexmit_bytes, - min(len, tp->t_maxseg)); + min(len, ctf_fixed_maxseg(tp))); counter_u64_add(rack_rtm_prr_retran, 1); } } + /* + * Enforce a connection sendmap count limit if set + * as long as we are not retransmiting. + */ + if ((rsm == NULL) && + (rack->do_detection == 0) && + (rack_tcp_map_entries_limit > 0) && + (rack->r_ctl.rc_num_maps_alloced >= rack_tcp_map_entries_limit)) { + counter_u64_add(rack_to_alloc_limited, 1); + if (!rack->alloc_limit_reported) { + rack->alloc_limit_reported = 1; + counter_u64_add(rack_alloc_limited_conns, 1); + } + goto just_return_nolock; + } if (rsm && (rsm->r_flags & RACK_HAS_FIN)) { /* we are retransmitting the fin */ len--; if (len) { /* * When retransmitting data do *not* include the * FIN. This could happen from a TLP probe. */ flags &= ~TH_FIN; } } #ifdef INVARIANTS /* For debugging */ rack->r_ctl.rc_rsm_at_retran = rsm; #endif - /* - * Enforce a connection sendmap count limit if set - * as long as we are not retransmiting. - */ - if ((rsm == NULL) && - (rack_map_entries_limit > 0) && - (rack->r_ctl.rc_num_maps_alloced >= rack_map_entries_limit)) { - counter_u64_add(rack_to_alloc_limited, 1); - if (!rack->alloc_limit_reported) { - rack->alloc_limit_reported = 1; - counter_u64_add(rack_alloc_limited_conns, 1); - } - goto just_return_nolock; - } /* * Get standard flags, and add SYN or FIN if requested by 'hidden' * state flags. */ if (tp->t_flags & TF_NEEDFIN) flags |= TH_FIN; if (tp->t_flags & TF_NEEDSYN) flags |= TH_SYN; if ((sack_rxmit == 0) && (prefetch_rsm == 0)) { void *end_rsm; end_rsm = TAILQ_LAST_FAST(&rack->r_ctl.rc_tmap, rack_sendmap, r_tnext); if (end_rsm) kern_prefetch(end_rsm, &prefetch_rsm); prefetch_rsm = 1; } SOCKBUF_LOCK(sb); /* * If in persist timeout with window of 0, send 1 byte. Otherwise, * if window is small but nonzero and time TF_SENTFIN expired, we * will send what we can and go to transmit state. */ if (tp->t_flags & TF_FORCEDATA) { if (sendwin == 0) { /* * If we still have some data to send, then clear * the FIN bit. Usually this would happen below * when it realizes that we aren't sending all the * data. However, if we have exactly 1 byte of * unsent data, then it won't clear the FIN bit * below, and if we are in persist state, we wind up * sending the packet without recording that we sent * the FIN bit. * * We can't just blindly clear the FIN bit, because * if we don't have any more data to send then the * probe will be the FIN itself. */ if (sb_offset < sbused(sb)) flags &= ~TH_FIN; sendwin = 1; } else { - if (rack->rc_in_persist) + if ((rack->rc_in_persist != 0) && + (tp->snd_wnd >= min((rack->r_ctl.rc_high_rwnd/2), + rack->r_ctl.rc_pace_min_segs))) rack_exit_persist(tp, rack); /* * If we are dropping persist mode then we need to * correct snd_nxt/snd_max and off. */ tp->snd_nxt = tp->snd_max; sb_offset = tp->snd_nxt - tp->snd_una; } } /* * If snd_nxt == snd_max and we have transmitted a FIN, the * sb_offset will be > 0 even if so_snd.sb_cc is 0, resulting in a * negative length. This can also occur when TCP opens up its * congestion window while receiving additional duplicate acks after * fast-retransmit because TCP will reset snd_nxt to snd_max after * the fast-retransmit. * * In the normal retransmit-FIN-only case, however, snd_nxt will be * set to snd_una, the sb_offset will be 0, and the length may wind * up 0. * * If sack_rxmit is true we are retransmitting from the scoreboard * in which case len is already set. */ if (sack_rxmit == 0) { uint32_t avail; avail = sbavail(sb); - if (SEQ_GT(tp->snd_nxt, tp->snd_una)) + if (SEQ_GT(tp->snd_nxt, tp->snd_una) && avail) sb_offset = tp->snd_nxt - tp->snd_una; else sb_offset = 0; if (IN_RECOVERY(tp->t_flags) == 0) { if (rack->r_ctl.rc_tlp_new_data) { /* TLP is forcing out new data */ if (rack->r_ctl.rc_tlp_new_data > (uint32_t) (avail - sb_offset)) { rack->r_ctl.rc_tlp_new_data = (uint32_t) (avail - sb_offset); } if (rack->r_ctl.rc_tlp_new_data > tp->snd_wnd) len = tp->snd_wnd; else len = rack->r_ctl.rc_tlp_new_data; rack->r_ctl.rc_tlp_new_data = 0; - doing_tlp = 1; + new_data_tlp = doing_tlp = 1; } else { if (sendwin > avail) { /* use the available */ if (avail > sb_offset) { len = (int32_t)(avail - sb_offset); } else { len = 0; } } else { if (sendwin > sb_offset) { len = (int32_t)(sendwin - sb_offset); } else { len = 0; } } } } else { uint32_t outstanding; /* * We are inside of a SACK recovery episode and are * sending new data, having retransmitted all the * data possible so far in the scoreboard. */ outstanding = tp->snd_max - tp->snd_una; if ((rack->r_ctl.rc_prr_sndcnt + outstanding) > tp->snd_wnd) { if (tp->snd_wnd > outstanding) { len = tp->snd_wnd - outstanding; /* Check to see if we have the data */ if (((sb_offset + len) > avail) && (avail > sb_offset)) len = avail - sb_offset; else len = 0; } else len = 0; } else if (avail > sb_offset) len = avail - sb_offset; else len = 0; if (len > 0) { if (len > rack->r_ctl.rc_prr_sndcnt) len = rack->r_ctl.rc_prr_sndcnt; - if (len > 0) { sub_from_prr = 1; counter_u64_add(rack_rtm_prr_newdata, 1); } } - if (len > tp->t_maxseg) { + if (len > ctf_fixed_maxseg(tp)) { /* * We should never send more than a MSS when * retransmitting or sending new data in prr * mode unless the override flag is on. Most * likely the PRR algorithm is not going to * let us send a lot as well :-) */ if (rack->r_ctl.rc_prr_sendalot == 0) - len = tp->t_maxseg; - } else if (len < tp->t_maxseg) { + len = ctf_fixed_maxseg(tp); + } else if (len < ctf_fixed_maxseg(tp)) { /* * Do we send any? The idea here is if the * send empty's the socket buffer we want to * do it. However if not then lets just wait * for our prr_sndcnt to get bigger. */ long leftinsb; leftinsb = sbavail(sb) - sb_offset; if (leftinsb > len) { /* This send does not empty the sb */ len = 0; } } } } if (prefetch_so_done == 0) { kern_prefetch(so, &prefetch_so_done); prefetch_so_done = 1; } /* * Lop off SYN bit if it has already been sent. However, if this is * SYN-SENT state and if segment contains data and if we don't know * that foreign host supports TAO, suppress sending segment. */ - if ((flags & TH_SYN) && SEQ_GT(tp->snd_nxt, tp->snd_una)) { - if ((tp->t_state != TCPS_SYN_RECEIVED) && - (tp->t_state != TCPS_SYN_SENT)) + if ((flags & TH_SYN) && SEQ_GT(tp->snd_nxt, tp->snd_una) && + ((sack_rxmit == 0) && (tp->t_rxtshift == 0))) { + if (tp->t_state != TCPS_SYN_RECEIVED) flags &= ~TH_SYN; -#ifdef TCP_RFC7413 /* * When sending additional segments following a TFO SYN|ACK, * do not include the SYN bit. */ - if ((tp->t_flags & TF_FASTOPEN) && + if (IS_FASTOPEN(tp->t_flags) && (tp->t_state == TCPS_SYN_RECEIVED)) flags &= ~TH_SYN; -#endif + sb_offset--, len++; } /* * Be careful not to send data and/or FIN on SYN segments. This * measure is needed to prevent interoperability problems with not * fully conformant TCP implementations. */ if ((flags & TH_SYN) && (tp->t_flags & TF_NOOPT)) { len = 0; flags &= ~TH_FIN; } -#ifdef TCP_RFC7413 /* - * When retransmitting SYN|ACK on a passively-created TFO socket, - * don't include data, as the presence of data may have caused the - * original SYN|ACK to have been dropped by a middlebox. + * On TFO sockets, ensure no data is sent in the following cases: + * + * - When retransmitting SYN|ACK on a passively-created socket + * + * - When retransmitting SYN on an actively created socket + * + * - When sending a zero-length cookie (cookie request) on an + * actively created socket + * + * - When the socket is in the CLOSED state (RST is being sent) */ - if ((tp->t_flags & TF_FASTOPEN) && - ((tp->t_state == TCPS_SYN_RECEIVED) && (tp->t_rxtshift > 0))) + if (IS_FASTOPEN(tp->t_flags) && + (((flags & TH_SYN) && (tp->t_rxtshift > 0)) || + ((tp->t_state == TCPS_SYN_SENT) && + (tp->t_tfo_client_cookie_len == 0)) || + (flags & TH_RST))) { + sack_rxmit = 0; len = 0; -#endif + } + /* Without fast-open there should never be data sent on a SYN */ + if ((flags & TH_SYN) && (!IS_FASTOPEN(tp->t_flags))) + len = 0; + orig_len = len; if (len <= 0) { /* * If FIN has been sent but not acked, but we haven't been * called to retransmit, len will be < 0. Otherwise, window * shrank after we sent into it. If window shrank to 0, * cancel pending retransmit, pull snd_nxt back to (closed) * window, and set the persist timer if it isn't already * going. If the window didn't close completely, just wait * for an ACK. * * We also do a general check here to ensure that we will * set the persist timer when we have data to send, but a * 0-byte window. This makes sure the persist timer is set * even if the packet hits one of the "goto send" lines * below. */ len = 0; if ((tp->snd_wnd == 0) && (TCPS_HAVEESTABLISHED(tp->t_state)) && + (tp->snd_una == tp->snd_max) && (sb_offset < (int)sbavail(sb))) { tp->snd_nxt = tp->snd_una; rack_enter_persist(tp, rack, cts); } + } else if ((rsm == NULL) && + ((doing_tlp == 0) || (new_data_tlp == 1)) && + (len < rack->r_ctl.rc_pace_max_segs)) { + /* + * We are not sending a full segment for + * some reason. Should we not send anything (think + * sws or persists)? + */ + if ((tp->snd_wnd < min((rack->r_ctl.rc_high_rwnd/2), rack->r_ctl.rc_pace_min_segs)) && + (TCPS_HAVEESTABLISHED(tp->t_state)) && + (len < (int)(sbavail(sb) - sb_offset))) { + /* + * Here the rwnd is less than + * the pacing size, this is not a retransmit, + * we are established and + * the send is not the last in the socket buffer + * we send nothing, and may enter persists. + */ + len = 0; + if (tp->snd_max == tp->snd_una) { + /* + * Nothing out we can + * go into persists. + */ + rack_enter_persist(tp, rack, cts); + tp->snd_nxt = tp->snd_una; + } + } else if ((tp->snd_cwnd >= max(rack->r_ctl.rc_pace_min_segs, (maxseg * 4))) && + (ctf_flight_size(tp, rack->r_ctl.rc_sacked) > (2 * maxseg)) && + (len < (int)(sbavail(sb) - sb_offset)) && + (len < rack->r_ctl.rc_pace_min_segs)) { + /* + * Here we are not retransmitting, and + * the cwnd is not so small that we could + * not send at least a min size (rxt timer + * not having gone off), We have 2 segments or + * more already in flight, its not the tail end + * of the socket buffer and the cwnd is blocking + * us from sending out a minimum pacing segment size. + * Lets not send anything. + */ + len = 0; + } else if (((tp->snd_wnd - ctf_outstanding(tp)) < + min((rack->r_ctl.rc_high_rwnd/2), rack->r_ctl.rc_pace_min_segs)) && + (ctf_flight_size(tp, rack->r_ctl.rc_sacked) > (2 * maxseg)) && + (len < (int)(sbavail(sb) - sb_offset)) && + (TCPS_HAVEESTABLISHED(tp->t_state))) { + /* + * Here we have a send window but we have + * filled it up and we can't send another pacing segment. + * We also have in flight more than 2 segments + * and we are not completing the sb i.e. we allow + * the last bytes of the sb to go out even if + * its not a full pacing segment. + */ + len = 0; + } } /* len will be >= 0 after this point. */ KASSERT(len >= 0, ("[%s:%d]: len < 0", __func__, __LINE__)); tcp_sndbuf_autoscale(tp, so, sendwin); /* * Decide if we can use TCP Segmentation Offloading (if supported by * hardware). * * TSO may only be used if we are in a pure bulk sending state. The * presence of TCP-MD5, SACK retransmits, SACK advertizements and IP * options prevent using TSO. With TSO the TCP header is the same * (except for the sequence number) for all generated packets. This * makes it impossible to transmit any options which vary per * generated segment or packet. * * IPv4 handling has a clear separation of ip options and ip header * flags while IPv6 combines both in in6p_outputopts. ip6_optlen() does * the right thing below to provide length of just ip options and thus * checking for ipoptlen is enough to decide if ip options are present. */ #ifdef INET6 if (isipv6) ipoptlen = ip6_optlen(tp->t_inpcb); else #endif if (tp->t_inpcb->inp_options) ipoptlen = tp->t_inpcb->inp_options->m_len - offsetof(struct ipoption, ipopt_list); else ipoptlen = 0; #if defined(IPSEC) || defined(IPSEC_SUPPORT) /* * Pre-calculate here as we save another lookup into the darknesses * of IPsec that way and can actually decide if TSO is ok. */ #ifdef INET6 if (isipv6 && IPSEC_ENABLED(ipv6)) ipsec_optlen = IPSEC_HDRSIZE(ipv6, tp->t_inpcb); #ifdef INET else #endif #endif /* INET6 */ #ifdef INET if (IPSEC_ENABLED(ipv4)) ipsec_optlen = IPSEC_HDRSIZE(ipv4, tp->t_inpcb); #endif /* INET */ #endif #if defined(IPSEC) || defined(IPSEC_SUPPORT) ipoptlen += ipsec_optlen; #endif - if ((tp->t_flags & TF_TSO) && V_tcp_do_tso && len > tp->t_maxseg && -#ifdef NETFLIX_TCP_O_UDP + if ((tp->t_flags & TF_TSO) && V_tcp_do_tso && len > ctf_fixed_maxseg(tp) && (tp->t_port == 0) && -#endif ((tp->t_flags & TF_SIGNATURE) == 0) && tp->rcv_numsacks == 0 && sack_rxmit == 0 && ipoptlen == 0) tso = 1; { uint32_t outstanding; outstanding = tp->snd_max - tp->snd_una; if (tp->t_flags & TF_SENTFIN) { /* * If we sent a fin, snd_max is 1 higher than * snd_una */ outstanding--; } - if (outstanding > 0) { - /* - * This is sub-optimal. We only send a stand alone - * FIN on its own segment. - */ - if (flags & TH_FIN) { - flags &= ~TH_FIN; - would_have_fin = 1; - } - } else if (sack_rxmit) { + if (sack_rxmit) { if ((rsm->r_flags & RACK_HAS_FIN) == 0) flags &= ~TH_FIN; } else { if (SEQ_LT(tp->snd_nxt + len, tp->snd_una + sbused(sb))) flags &= ~TH_FIN; } } recwin = sbspace(&so->so_rcv); /* * Sender silly window avoidance. We transmit under the following * conditions when len is non-zero: * * - We have a full segment (or more with TSO) - This is the last * buffer in a write()/send() and we are either idle or running * NODELAY - we've timed out (e.g. persist timer) - we have more * then 1/2 the maximum send window's worth of data (receiver may be * limited the window size) - we need to retransmit */ if (len) { - if (len >= tp->t_maxseg) { + if (len >= ctf_fixed_maxseg(tp)) { pass = 1; goto send; } /* * NOTE! on localhost connections an 'ack' from the remote * end may occur synchronously with the output and cause us * to flush a buffer queued with moretocome. XXX * */ if (!(tp->t_flags & TF_MORETOCOME) && /* normal case */ (idle || (tp->t_flags & TF_NODELAY)) && ((uint32_t)len + (uint32_t)sb_offset >= sbavail(&so->so_snd)) && (tp->t_flags & TF_NOPUSH) == 0) { pass = 2; goto send; } if (tp->t_flags & TF_FORCEDATA) { /* typ. timeout case */ pass = 3; goto send; } if ((tp->snd_una == tp->snd_max) && len) { /* Nothing outstanding */ goto send; } if (len >= tp->max_sndwnd / 2 && tp->max_sndwnd > 0) { pass = 4; goto send; } if (SEQ_LT(tp->snd_nxt, tp->snd_max)) { /* retransmit case */ pass = 5; goto send; } if (sack_rxmit) { pass = 6; goto send; } } /* * Sending of standalone window updates. * * Window updates are important when we close our window due to a * full socket buffer and are opening it again after the application * reads data from it. Once the window has opened again and the * remote end starts to send again the ACK clock takes over and * provides the most current window information. * * We must avoid the silly window syndrome whereas every read from * the receive buffer, no matter how small, causes a window update * to be sent. We also should avoid sending a flurry of window * updates when the socket buffer had queued a lot of data and the * application is doing small reads. * * Prevent a flurry of pointless window updates by only sending an * update when we can increase the advertized window by more than * 1/4th of the socket buffer capacity. When the buffer is getting * full or is very small be more aggressive and send an update * whenever we can increase by two mss sized segments. In all other * situations the ACK's to new incoming data will carry further * window increases. * * Don't send an independent window update if a delayed ACK is * pending (it will get piggy-backed on it) or the remote side * already has done a half-close and won't send more data. Skip * this if the connection is in T/TCP half-open state. */ if (recwin > 0 && !(tp->t_flags & TF_NEEDSYN) && !(tp->t_flags & TF_DELACK) && !TCPS_HAVERCVDFIN(tp->t_state)) { /* * "adv" is the amount we could increase the window, taking * into account that we are limited by TCP_MAXWIN << * tp->rcv_scale. */ int32_t adv; int oldwin; adv = min(recwin, (long)TCP_MAXWIN << tp->rcv_scale); if (SEQ_GT(tp->rcv_adv, tp->rcv_nxt)) { oldwin = (tp->rcv_adv - tp->rcv_nxt); adv -= oldwin; } else oldwin = 0; /* * If the new window size ends up being the same as the old * size when it is scaled, then don't force a window update. */ if (oldwin >> tp->rcv_scale == (adv + oldwin) >> tp->rcv_scale) goto dontupdate; - if (adv >= (int32_t)(2 * tp->t_maxseg) && + if (adv >= (int32_t)(2 * ctf_fixed_maxseg(tp)) && (adv >= (int32_t)(so->so_rcv.sb_hiwat / 4) || recwin <= (int32_t)(so->so_rcv.sb_hiwat / 8) || - so->so_rcv.sb_hiwat <= 8 * tp->t_maxseg)) { + so->so_rcv.sb_hiwat <= 8 * ctf_fixed_maxseg(tp))) { pass = 7; goto send; } if (2 * adv >= (int32_t) so->so_rcv.sb_hiwat) goto send; } dontupdate: /* * Send if we owe the peer an ACK, RST, SYN, or urgent data. ACKNOW * is also a catch-all for the retransmit timer timeout case. */ if (tp->t_flags & TF_ACKNOW) { pass = 8; goto send; } if (((flags & TH_SYN) && (tp->t_flags & TF_NEEDSYN) == 0)) { pass = 9; goto send; } if (SEQ_GT(tp->snd_up, tp->snd_una)) { pass = 10; goto send; } /* * If our state indicates that FIN should be sent and we have not * yet done so, then we need to send. */ - if (flags & TH_FIN) { - if ((tp->t_flags & TF_SENTFIN) || - (((tp->t_flags & TF_SENTFIN) == 0) && - (tp->snd_nxt == tp->snd_una))) { - pass = 11; - goto send; - } + if ((flags & TH_FIN) && + (tp->snd_nxt == tp->snd_una)) { + pass = 11; + goto send; } /* * No reason to send a segment, just return. */ just_return: SOCKBUF_UNLOCK(sb); just_return_nolock: if (tot_len_this_send == 0) counter_u64_add(rack_out_size[TCP_MSS_ACCT_JUSTRET], 1); - rack_start_hpts_timer(rack, tp, cts, __LINE__, slot, tot_len_this_send, 1); + if (slot) { + /* set the rack tcb into the slot N */ + counter_u64_add(rack_paced_segments, 1); + } else if (tot_len_this_send) { + counter_u64_add(rack_unpaced_segments, 1); + } + /* Check if we need to go into persists or not */ + if ((rack->rc_in_persist == 0) && + (tp->snd_max == tp->snd_una) && + TCPS_HAVEESTABLISHED(tp->t_state) && + sbavail(&tp->t_inpcb->inp_socket->so_snd) && + (sbavail(&tp->t_inpcb->inp_socket->so_snd) > tp->snd_wnd) && + (tp->snd_wnd < min((rack->r_ctl.rc_high_rwnd/2), rack->r_ctl.rc_pace_min_segs))) { + /* Yes lets make sure to move to persist before timer-start */ + rack_enter_persist(tp, rack, rack->r_ctl.rc_rcvtime); + } + rack_start_hpts_timer(rack, tp, cts, slot, tot_len_this_send, sup_rack); rack_log_type_just_return(rack, cts, tot_len_this_send, slot, hpts_calling); tp->t_flags &= ~TF_FORCEDATA; return (0); send: + if ((flags & TH_FIN) && + sbavail(&tp->t_inpcb->inp_socket->so_snd)) { + /* + * We do not transmit a FIN + * with data outstanding. We + * need to make it so all data + * is acked first. + */ + flags &= ~TH_FIN; + } if (doing_tlp == 0) { /* * Data not a TLP, and its not the rxt firing. If it is the * rxt firing, we want to leave the tlp_in_progress flag on * so we don't send another TLP. It has to be a rack timer * or normal send (response to acked data) to clear the tlp * in progress flag. */ rack->rc_tlp_in_progress = 0; } SOCKBUF_LOCK_ASSERT(sb); if (len > 0) { - if (len >= tp->t_maxseg) + if (len >= ctf_fixed_maxseg(tp)) tp->t_flags2 |= TF2_PLPMTU_MAXSEGSNT; else tp->t_flags2 &= ~TF2_PLPMTU_MAXSEGSNT; } /* * Before ESTABLISHED, force sending of initial options unless TCP * set not to do any options. NOTE: we assume that the IP/TCP header * plus TCP options always fit in a single mbuf, leaving room for a * maximum link header, i.e. max_linkhdr + sizeof (struct tcpiphdr) * + optlen <= MCLBYTES */ optlen = 0; #ifdef INET6 if (isipv6) hdrlen = sizeof(struct ip6_hdr) + sizeof(struct tcphdr); else #endif hdrlen = sizeof(struct tcpiphdr); /* * Compute options for segment. We only have to care about SYN and * established connection segments. Options for SYN-ACK segments * are handled in TCP syncache. */ to.to_flags = 0; if ((tp->t_flags & TF_NOOPT) == 0) { /* Maximum segment size. */ if (flags & TH_SYN) { tp->snd_nxt = tp->iss; to.to_mss = tcp_mssopt(&inp->inp_inc); -#ifdef NETFLIX_TCP_O_UDP +#ifdef NETFLIX_TCPOUDP if (tp->t_port) to.to_mss -= V_tcp_udp_tunneling_overhead; #endif to.to_flags |= TOF_MSS; -#ifdef TCP_RFC7413 + /* - * Only include the TFO option on the first - * transmission of the SYN|ACK on a - * passively-created TFO socket, as the presence of - * the TFO option may have caused the original - * SYN|ACK to have been dropped by a middlebox. + * On SYN or SYN|ACK transmits on TFO connections, + * only include the TFO option if it is not a + * retransmit, as the presence of the TFO option may + * have caused the original SYN or SYN|ACK to have + * been dropped by a middlebox. */ - if ((tp->t_flags & TF_FASTOPEN) && - (tp->t_state == TCPS_SYN_RECEIVED) && + if (IS_FASTOPEN(tp->t_flags) && (tp->t_rxtshift == 0)) { - to.to_tfo_len = TCP_FASTOPEN_MAX_COOKIE_LEN; - to.to_tfo_cookie = (u_char *)&tp->t_tfo_cookie; - to.to_flags |= TOF_FASTOPEN; + if (tp->t_state == TCPS_SYN_RECEIVED) { + to.to_tfo_len = TCP_FASTOPEN_COOKIE_LEN; + to.to_tfo_cookie = + (u_int8_t *)&tp->t_tfo_cookie.server; + to.to_flags |= TOF_FASTOPEN; + wanted_cookie = 1; + } else if (tp->t_state == TCPS_SYN_SENT) { + to.to_tfo_len = + tp->t_tfo_client_cookie_len; + to.to_tfo_cookie = + tp->t_tfo_cookie.client; + to.to_flags |= TOF_FASTOPEN; + wanted_cookie = 1; + /* + * If we wind up having more data to + * send with the SYN than can fit in + * one segment, don't send any more + * until the SYN|ACK comes back from + * the other end. + */ + sendalot = 0; + } } -#endif } /* Window scaling. */ if ((flags & TH_SYN) && (tp->t_flags & TF_REQ_SCALE)) { to.to_wscale = tp->request_r_scale; to.to_flags |= TOF_SCALE; } /* Timestamps. */ if ((tp->t_flags & TF_RCVD_TSTMP) || ((flags & TH_SYN) && (tp->t_flags & TF_REQ_TSTMP))) { to.to_tsval = cts + tp->ts_offset; to.to_tsecr = tp->ts_recent; to.to_flags |= TOF_TS; } /* Set receive buffer autosizing timestamp. */ if (tp->rfbuf_ts == 0 && (so->so_rcv.sb_flags & SB_AUTOSIZE)) tp->rfbuf_ts = tcp_ts_getticks(); /* Selective ACK's. */ if (flags & TH_SYN) to.to_flags |= TOF_SACKPERM; else if (TCPS_HAVEESTABLISHED(tp->t_state) && tp->rcv_numsacks > 0) { to.to_flags |= TOF_SACK; to.to_nsacks = tp->rcv_numsacks; to.to_sacks = (u_char *)tp->sackblks; } #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) /* TCP-MD5 (RFC2385). */ if (tp->t_flags & TF_SIGNATURE) to.to_flags |= TOF_SIGNATURE; #endif /* TCP_SIGNATURE */ /* Processing the options. */ hdrlen += optlen = tcp_addoptions(&to, opt); + /* + * If we wanted a TFO option to be added, but it was unable + * to fit, ensure no data is sent. + */ + if (IS_FASTOPEN(tp->t_flags) && wanted_cookie && + !(to.to_flags & TOF_FASTOPEN)) + len = 0; } -#ifdef NETFLIX_TCP_O_UDP +#ifdef NETFLIX_TCPOUDP if (tp->t_port) { if (V_tcp_udp_tunneling_port == 0) { /* The port was removed?? */ SOCKBUF_UNLOCK(&so->so_snd); return (EHOSTUNREACH); } hdrlen += sizeof(struct udphdr); } #endif #ifdef INET6 if (isipv6) ipoptlen = ip6_optlen(tp->t_inpcb); else #endif if (tp->t_inpcb->inp_options) ipoptlen = tp->t_inpcb->inp_options->m_len - offsetof(struct ipoption, ipopt_list); else ipoptlen = 0; #if defined(IPSEC) || defined(IPSEC_SUPPORT) ipoptlen += ipsec_optlen; #endif +#ifdef KERN_TLS + /* force TSO for so TLS offload can get mss */ + if (sb->sb_flags & SB_TLS_IFNET) { + force_tso = 1; + } +#endif /* * Adjust data length if insertion of options will bump the packet * length beyond the t_maxseg length. Clear the FIN bit because we * cut off the tail of the segment. */ if (len + optlen + ipoptlen > tp->t_maxseg) { - if (flags & TH_FIN) { - would_have_fin = 1; - flags &= ~TH_FIN; - } if (tso) { uint32_t if_hw_tsomax; uint32_t moff; int32_t max_len; /* extract TSO information */ if_hw_tsomax = tp->t_tsomax; if_hw_tsomaxsegcount = tp->t_tsomaxsegcount; if_hw_tsomaxsegsize = tp->t_tsomaxsegsize; KASSERT(ipoptlen == 0, ("%s: TSO can't do IP options", __func__)); /* * Check if we should limit by maximum payload * length: */ if (if_hw_tsomax != 0) { /* compute maximum TSO length */ max_len = (if_hw_tsomax - hdrlen - max_linkhdr); if (max_len <= 0) { len = 0; } else if (len > max_len) { sendalot = 1; len = max_len; } } /* * Prevent the last segment from being fractional * unless the send sockbuf can be emptied: */ max_len = (tp->t_maxseg - optlen); - if ((sb_offset + len) < sbavail(sb)) { + if (((sb_offset + len) < sbavail(sb)) && + (hw_tls == 0)) { moff = len % (u_int)max_len; if (moff != 0) { len -= moff; sendalot = 1; } - } - /* + } + /* * In case there are too many small fragments don't * use TSO: */ - if (len <= max_len) { + if (len <= maxseg) { len = max_len; sendalot = 1; tso = 0; } /* * Send the FIN in a separate segment after the bulk * sending is done. We don't trust the TSO * implementations to clear the FIN flag on all but * the last segment. */ if (tp->t_flags & TF_NEEDFIN) sendalot = 1; } else { if (optlen + ipoptlen > tp->t_maxseg) { /* * Since we don't have enough space to put * the IP header chain and the TCP header in * one packet as required by RFC 7112, don't * send it. */ SOCKBUF_UNLOCK(&so->so_snd); error = EMSGSIZE; sack_rxmit = 0; goto out; } len = tp->t_maxseg - optlen - ipoptlen; sendalot = 1; } } else tso = 0; KASSERT(len + hdrlen + ipoptlen <= IP_MAXPACKET, ("%s: len > IP_MAXPACKET", __func__)); #ifdef DIAGNOSTIC #ifdef INET6 if (max_linkhdr + hdrlen > MCLBYTES) #else if (max_linkhdr + hdrlen > MHLEN) #endif panic("tcphdr too big"); #endif /* * This KASSERT is here to catch edge cases at a well defined place. * Before, those had triggered (random) panic conditions further * down. */ KASSERT(len >= 0, ("[%s:%d]: len < 0", __func__, __LINE__)); if ((len == 0) && (flags & TH_FIN) && (sbused(sb))) { /* * We have outstanding data, don't send a fin by itself!. */ goto just_return; } /* * Grab a header mbuf, attaching a copy of data to be transmitted, * and initialize the header from the template for sends on this * connection. */ if (len) { uint32_t max_val; uint32_t moff; if (rack->rc_pace_max_segs) - max_val = rack->rc_pace_max_segs * tp->t_maxseg; + max_val = rack->rc_pace_max_segs * ctf_fixed_maxseg(tp); else max_val = len; + if (rack->r_ctl.rc_pace_max_segs < max_val) + max_val = rack->r_ctl.rc_pace_max_segs; /* * We allow a limit on sending with hptsi. */ if (len > max_val) { len = max_val; } #ifdef INET6 if (MHLEN < hdrlen + max_linkhdr) m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); else #endif m = m_gethdr(M_NOWAIT, MT_DATA); if (m == NULL) { SOCKBUF_UNLOCK(sb); error = ENOBUFS; sack_rxmit = 0; goto out; } m->m_data += max_linkhdr; m->m_len = hdrlen; /* * Start the m_copy functions from the closest mbuf to the * sb_offset in the socket buffer chain. */ mb = sbsndptr_noadv(sb, sb_offset, &moff); if (len <= MHLEN - hdrlen - max_linkhdr && !hw_tls) { m_copydata(mb, moff, (int)len, mtod(m, caddr_t)+hdrlen); if (SEQ_LT(tp->snd_nxt, tp->snd_max)) sbsndptr_adv(sb, mb, len); m->m_len += len; } else { struct sockbuf *msb; if (SEQ_LT(tp->snd_nxt, tp->snd_max)) msb = NULL; else msb = sb; - m->m_next = tcp_m_copym(/*tp, */ mb, moff, &len, - if_hw_tsomaxsegcount, if_hw_tsomaxsegsize, msb, - hw_tls /*, NULL */); + m->m_next = tcp_m_copym( +#ifdef NETFLIX_COPY_ARGS + tp, +#endif + mb, moff, &len, + if_hw_tsomaxsegcount, if_hw_tsomaxsegsize, msb, + ((rsm == NULL) ? hw_tls : 0) +#ifdef NETFLIX_COPY_ARGS + , &filled_all +#endif + ); if (len <= (tp->t_maxseg - optlen)) { /* * Must have ran out of mbufs for the copy * shorten it to no longer need tso. Lets * not put on sendalot since we are low on * mbufs. */ tso = 0; } if (m->m_next == NULL) { SOCKBUF_UNLOCK(sb); (void)m_free(m); error = ENOBUFS; sack_rxmit = 0; goto out; } } if ((tp->t_flags & TF_FORCEDATA) && len == 1) { TCPSTAT_INC(tcps_sndprobe); #ifdef NETFLIX_STATS if (SEQ_LT(tp->snd_nxt, tp->snd_max)) stats_voi_update_abs_u32(tp->t_stats, VOI_TCP_RETXPB, len); else stats_voi_update_abs_u64(tp->t_stats, VOI_TCP_TXPB, len); #endif } else if (SEQ_LT(tp->snd_nxt, tp->snd_max) || sack_rxmit) { if (rsm && (rsm->r_flags & RACK_TLP)) { /* * TLP should not count in retran count, but * in its own bin */ -/* tp->t_sndtlppack++;*/ -/* tp->t_sndtlpbyte += len;*/ counter_u64_add(rack_tlp_retran, 1); counter_u64_add(rack_tlp_retran_bytes, len); } else { tp->t_sndrexmitpack++; TCPSTAT_INC(tcps_sndrexmitpack); TCPSTAT_ADD(tcps_sndrexmitbyte, len); } #ifdef NETFLIX_STATS stats_voi_update_abs_u32(tp->t_stats, VOI_TCP_RETXPB, len); #endif } else { TCPSTAT_INC(tcps_sndpack); TCPSTAT_ADD(tcps_sndbyte, len); #ifdef NETFLIX_STATS stats_voi_update_abs_u64(tp->t_stats, VOI_TCP_TXPB, len); #endif } /* * If we're sending everything we've got, set PUSH. (This * will keep happy those implementations which only give * data to the user when a buffer fills or a PUSH comes in.) */ if (sb_offset + len == sbused(sb) && sbused(sb) && !(flags & TH_SYN)) flags |= TH_PUSH; /* - * Are we doing hptsi, if so we must calculate the slot. We + * Are we doing pacing, if so we must calculate the slot. We * only do hptsi in ESTABLISHED and with no RESET being * sent where we have data to send. */ if (((tp->t_state == TCPS_ESTABLISHED) || (tp->t_state == TCPS_CLOSE_WAIT) || ((tp->t_state == TCPS_FIN_WAIT_1) && ((tp->t_flags & TF_SENTFIN) == 0) && ((flags & TH_FIN) == 0))) && - ((flags & TH_RST) == 0) && - (rack->rc_always_pace)) { - /* - * We use the most optimistic possible cwnd/srtt for - * sending calculations. This will make our - * calculation anticipate getting more through - * quicker then possible. But thats ok we don't want - * the peer to have a gap in data sending. - */ - uint32_t srtt, cwnd, tr_perms = 0; - - if (rack->r_ctl.rc_rack_min_rtt) - srtt = rack->r_ctl.rc_rack_min_rtt; - else - srtt = TICKS_2_MSEC((tp->t_srtt >> TCP_RTT_SHIFT)); - if (rack->r_ctl.rc_rack_largest_cwnd) - cwnd = rack->r_ctl.rc_rack_largest_cwnd; - else - cwnd = tp->snd_cwnd; - tr_perms = cwnd / srtt; - if (tr_perms == 0) { - tr_perms = tp->t_maxseg; - } + ((flags & TH_RST) == 0)) { + /* Get our pacing rate */ tot_len_this_send += len; - /* - * Calculate how long this will take to drain, if - * the calculation comes out to zero, thats ok we - * will use send_a_lot to possibly spin around for - * more increasing tot_len_this_send to the point - * that its going to require a pace, or we hit the - * cwnd. Which in that case we are just waiting for - * a ACK. - */ - slot = tot_len_this_send / tr_perms; - /* Now do we reduce the time so we don't run dry? */ - if (slot && rack->rc_pace_reduce) { - int32_t reduce; - - reduce = (slot / rack->rc_pace_reduce); - if (reduce < slot) { - slot -= reduce; - } else - slot = 0; - } - if (rack->r_enforce_min_pace && - (slot == 0) && - (tot_len_this_send >= (rack->r_min_pace_seg_thresh * tp->t_maxseg))) { - /* We are enforcing a minimum pace time of 1ms */ - slot = rack->r_enforce_min_pace; - } + slot = rack_get_pacing_delay(rack, tp, tot_len_this_send); } SOCKBUF_UNLOCK(sb); } else { SOCKBUF_UNLOCK(sb); if (tp->t_flags & TF_ACKNOW) TCPSTAT_INC(tcps_sndacks); else if (flags & (TH_SYN | TH_FIN | TH_RST)) TCPSTAT_INC(tcps_sndctrl); else if (SEQ_GT(tp->snd_up, tp->snd_una)) TCPSTAT_INC(tcps_sndurg); else TCPSTAT_INC(tcps_sndwinup); m = m_gethdr(M_NOWAIT, MT_DATA); if (m == NULL) { error = ENOBUFS; sack_rxmit = 0; goto out; } #ifdef INET6 if (isipv6 && (MHLEN < hdrlen + max_linkhdr) && MHLEN >= hdrlen) { M_ALIGN(m, hdrlen); } else #endif m->m_data += max_linkhdr; m->m_len = hdrlen; } SOCKBUF_UNLOCK_ASSERT(sb); m->m_pkthdr.rcvif = (struct ifnet *)0; #ifdef MAC mac_inpcb_create_mbuf(inp, m); #endif #ifdef INET6 if (isipv6) { ip6 = mtod(m, struct ip6_hdr *); -#ifdef NETFLIX_TCP_O_UDP +#ifdef NETFLIX_TCPOUDP if (tp->t_port) { udp = (struct udphdr *)((caddr_t)ip6 + ipoptlen + sizeof(struct ip6_hdr)); udp->uh_sport = htons(V_tcp_udp_tunneling_port); udp->uh_dport = tp->t_port; ulen = hdrlen + len - sizeof(struct ip6_hdr); udp->uh_ulen = htons(ulen); th = (struct tcphdr *)(udp + 1); - } else + } else #endif th = (struct tcphdr *)(ip6 + 1); - tcpip_fillheaders(inp, /*tp->t_port, */ ip6, th); + tcpip_fillheaders(inp, +#ifdef NETFLIX_TCPOUDP + tp->t_port, +#endif + ip6, th); } else #endif /* INET6 */ { ip = mtod(m, struct ip *); #ifdef TCPDEBUG ipov = (struct ipovly *)ip; #endif -#ifdef NETFLIX_TCP_O_UDP +#ifdef NETFLIX_TCPOUDP if (tp->t_port) { udp = (struct udphdr *)((caddr_t)ip + ipoptlen + sizeof(struct ip)); udp->uh_sport = htons(V_tcp_udp_tunneling_port); udp->uh_dport = tp->t_port; ulen = hdrlen + len - sizeof(struct ip); udp->uh_ulen = htons(ulen); th = (struct tcphdr *)(udp + 1); } else #endif th = (struct tcphdr *)(ip + 1); - tcpip_fillheaders(inp,/*tp->t_port, */ ip, th); + tcpip_fillheaders(inp, +#ifdef NETFLIX_TCPOUDP + tp->t_port, +#endif + ip, th); } /* * Fill in fields, remembering maximum advertised window for use in * delaying messages about window sizes. If resending a FIN, be sure * not to use a new sequence number. */ if (flags & TH_FIN && tp->t_flags & TF_SENTFIN && tp->snd_nxt == tp->snd_max) tp->snd_nxt--; /* * If we are starting a connection, send ECN setup SYN packet. If we * are on a retransmit, we may resend those bits a number of times * as per RFC 3168. */ if (tp->t_state == TCPS_SYN_SENT && V_tcp_do_ecn == 1) { if (tp->t_rxtshift >= 1) { if (tp->t_rxtshift <= V_tcp_ecn_maxretries) flags |= TH_ECE | TH_CWR; } else flags |= TH_ECE | TH_CWR; } if (tp->t_state == TCPS_ESTABLISHED && (tp->t_flags & TF_ECN_PERMIT)) { /* * If the peer has ECN, mark data packets with ECN capable * transmission (ECT). Ignore pure ack packets, * retransmissions and window probes. */ if (len > 0 && SEQ_GEQ(tp->snd_nxt, tp->snd_max) && !((tp->t_flags & TF_FORCEDATA) && len == 1)) { #ifdef INET6 if (isipv6) ip6->ip6_flow |= htonl(IPTOS_ECN_ECT0 << 20); else #endif ip->ip_tos |= IPTOS_ECN_ECT0; TCPSTAT_INC(tcps_ecn_ect0); } /* * Reply with proper ECN notifications. */ if (tp->t_flags & TF_ECN_SND_CWR) { flags |= TH_CWR; tp->t_flags &= ~TF_ECN_SND_CWR; } if (tp->t_flags & TF_ECN_SND_ECE) flags |= TH_ECE; } /* * If we are doing retransmissions, then snd_nxt will not reflect * the first unsent octet. For ACK only packets, we do not want the * sequence number of the retransmitted packet, we want the sequence * number of the next unsent octet. So, if there is no data (and no * SYN or FIN), use snd_max instead of snd_nxt when filling in * ti_seq. But if we are in persist state, snd_max might reflect * one byte beyond the right edge of the window, so use snd_nxt in * that case, since we know we aren't doing a retransmission. * (retransmit and persist are mutually exclusive...) */ if (sack_rxmit == 0) { if (len || (flags & (TH_SYN | TH_FIN)) || rack->rc_in_persist) { th->th_seq = htonl(tp->snd_nxt); rack_seq = tp->snd_nxt; } else if (flags & TH_RST) { /* * For a Reset send the last cum ack in sequence * (this like any other choice may still generate a * challenge ack, if a ack-update packet is in * flight). */ th->th_seq = htonl(tp->snd_una); rack_seq = tp->snd_una; } else { th->th_seq = htonl(tp->snd_max); rack_seq = tp->snd_max; } } else { th->th_seq = htonl(rsm->r_start); rack_seq = rsm->r_start; } th->th_ack = htonl(tp->rcv_nxt); if (optlen) { bcopy(opt, th + 1, optlen); th->th_off = (sizeof(struct tcphdr) + optlen) >> 2; } th->th_flags = flags; /* * Calculate receive window. Don't shrink window, but avoid silly * window syndrome. + * If a RST segment is sent, advertise a window of zero. */ - if (recwin < (long)(so->so_rcv.sb_hiwat / 4) && - recwin < (long)tp->t_maxseg) + if (flags & TH_RST) { recwin = 0; - if (SEQ_GT(tp->rcv_adv, tp->rcv_nxt) && - recwin < (long)(tp->rcv_adv - tp->rcv_nxt)) - recwin = (long)(tp->rcv_adv - tp->rcv_nxt); - if (recwin > (long)TCP_MAXWIN << tp->rcv_scale) - recwin = (long)TCP_MAXWIN << tp->rcv_scale; + } else { + if (recwin < (long)(so->so_rcv.sb_hiwat / 4) && + recwin < (long)ctf_fixed_maxseg(tp)) + recwin = 0; + if (SEQ_GT(tp->rcv_adv, tp->rcv_nxt) && + recwin < (long)(tp->rcv_adv - tp->rcv_nxt)) + recwin = (long)(tp->rcv_adv - tp->rcv_nxt); + if (recwin > (long)TCP_MAXWIN << tp->rcv_scale) + recwin = (long)TCP_MAXWIN << tp->rcv_scale; + } /* * According to RFC1323 the window field in a SYN (i.e., a or * ) segment itself is never scaled. The case is * handled in syncache. */ if (flags & TH_SYN) th->th_win = htons((u_short) (min(sbspace(&so->so_rcv), TCP_MAXWIN))); else th->th_win = htons((u_short)(recwin >> tp->rcv_scale)); /* * Adjust the RXWIN0SENT flag - indicate that we have advertised a 0 * window. This may cause the remote transmitter to stall. This * flag tells soreceive() to disable delayed acknowledgements when * draining the buffer. This can occur if the receiver is * attempting to read more data than can be buffered prior to * transmitting on the connection. */ if (th->th_win == 0) { tp->t_sndzerowin++; tp->t_flags |= TF_RXWIN0SENT; } else tp->t_flags &= ~TF_RXWIN0SENT; if (SEQ_GT(tp->snd_up, tp->snd_nxt)) { th->th_urp = htons((u_short)(tp->snd_up - tp->snd_nxt)); th->th_flags |= TH_URG; } else /* * If no urgent pointer to send, then we pull the urgent * pointer to the left edge of the send window so that it * doesn't drift into the send window on sequence number * wraparound. */ tp->snd_up = tp->snd_una; /* drag it along */ #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) if (to.to_flags & TOF_SIGNATURE) { /* * Calculate MD5 signature and put it into the place * determined before. * NOTE: since TCP options buffer doesn't point into * mbuf's data, calculate offset and use it. */ if (!TCPMD5_ENABLED() || TCPMD5_OUTPUT(m, th, (u_char *)(th + 1) + (to.to_signature - opt)) != 0) { /* * Do not send segment if the calculation of MD5 * digest has failed. */ goto out; } } #endif /* * Put TCP length in extended header, and then checksum extended * header and data. */ m->m_pkthdr.len = hdrlen + len; /* in6_cksum() need this */ #ifdef INET6 if (isipv6) { /* * ip6_plen is not need to be filled now, and will be filled * in ip6_output. */ -#ifdef NETFLIX_TCP_O_UDP if (tp->t_port) { m->m_pkthdr.csum_flags = CSUM_UDP_IPV6; m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); udp->uh_sum = in6_cksum_pseudo(ip6, ulen, IPPROTO_UDP, 0); th->th_sum = htons(0); UDPSTAT_INC(udps_opackets); } else { -#endif m->m_pkthdr.csum_flags = CSUM_TCP_IPV6; m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum); th->th_sum = in6_cksum_pseudo(ip6, sizeof(struct tcphdr) + optlen + len, IPPROTO_TCP, 0); -#ifdef NETFLIX_TCP_O_UDP } -#endif } #endif #if defined(INET6) && defined(INET) else #endif #ifdef INET { -#ifdef NETFLIX_TCP_O_UDP if (tp->t_port) { m->m_pkthdr.csum_flags = CSUM_UDP; m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); udp->uh_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, htons(ulen + IPPROTO_UDP)); th->th_sum = htons(0); UDPSTAT_INC(udps_opackets); } else { -#endif m->m_pkthdr.csum_flags = CSUM_TCP; m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum); th->th_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, htons(sizeof(struct tcphdr) + IPPROTO_TCP + len + optlen)); -#ifdef NETFLIX_TCP_O_UDP } -#endif /* IP version must be set here for ipv4/ipv6 checking later */ KASSERT(ip->ip_v == IPVERSION, ("%s: IP version incorrect: %d", __func__, ip->ip_v)); } #endif - /* * Enable TSO and specify the size of the segments. The TCP pseudo * header checksum is always provided. XXX: Fixme: This is currently * not the case for IPv6. */ - if (tso) { - KASSERT(len > tp->t_maxseg - optlen, + if (tso || force_tso) { + KASSERT(force_tso || len > tp->t_maxseg - optlen, ("%s: len <= tso_segsz", __func__)); m->m_pkthdr.csum_flags |= CSUM_TSO; m->m_pkthdr.tso_segsz = tp->t_maxseg - optlen; } KASSERT(len + hdrlen == m_length(m, NULL), ("%s: mbuf chain different than expected: %d + %u != %u", __func__, len, hdrlen, m_length(m, NULL))); #ifdef TCP_HHOOK /* Run HHOOK_TCP_ESTABLISHED_OUT helper hooks. */ hhook_run_tcp_est_out(tp, th, &to, len, tso); #endif - #ifdef TCPDEBUG /* * Trace. */ if (so->so_options & SO_DEBUG) { u_short save = 0; #ifdef INET6 if (!isipv6) #endif { save = ipov->ih_len; ipov->ih_len = htons(m->m_pkthdr.len /* - hdrlen + * (th->th_off << 2) */ ); } tcp_trace(TA_OUTPUT, tp->t_state, tp, mtod(m, void *), th, 0); #ifdef INET6 if (!isipv6) #endif ipov->ih_len = save; } #endif /* TCPDEBUG */ /* We're getting ready to send; log now. */ if (tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; + struct timeval tv; memset(&log.u_bbr, 0, sizeof(log.u_bbr)); log.u_bbr.inhpts = rack->rc_inp->inp_in_hpts; log.u_bbr.ininput = rack->rc_inp->inp_in_input; log.u_bbr.flex1 = rack->r_ctl.rc_prr_sndcnt; + log.u_bbr.flex2 = rack->r_ctl.rc_pace_min_segs; + log.u_bbr.flex3 = rack->r_ctl.rc_pace_max_segs; + log.u_bbr.flex4 = orig_len; + if (filled_all) + log.u_bbr.flex5 = 0x80000000; + else + log.u_bbr.flex5 = 0; if (rsm || sack_rxmit) { log.u_bbr.flex8 = 1; } else { log.u_bbr.flex8 = 0; } + log.u_bbr.pkts_out = tp->t_maxseg; + log.u_bbr.timeStamp = tcp_get_usecs(&tv); + log.u_bbr.inflight = ctf_flight_size(rack->rc_tp, rack->r_ctl.rc_sacked); lgb = tcp_log_event_(tp, th, &so->so_rcv, &so->so_snd, TCP_LOG_OUT, ERRNO_UNK, - len, &log, false, NULL, NULL, 0, NULL); + len, &log, false, NULL, NULL, 0, &tv); } else lgb = NULL; /* * Fill in IP length and desired time to live and send to IP level. * There should be a better way to handle ttl and tos; we could keep * them in the template, but need a way to checksum without them. */ /* * m->m_pkthdr.len should have been set before cksum calcuration, * because in6_cksum() need it. */ #ifdef INET6 if (isipv6) { /* * we separately set hoplimit for every segment, since the * user might want to change the value via setsockopt. Also, * desired default hop limit might be changed via Neighbor * Discovery. */ ip6->ip6_hlim = in6_selecthlim(inp, NULL); /* * Set the packet size here for the benefit of DTrace * probes. ip6_output() will set it properly; it's supposed * to include the option header lengths as well. */ ip6->ip6_plen = htons(m->m_pkthdr.len - sizeof(*ip6)); if (V_path_mtu_discovery && tp->t_maxseg > V_tcp_minmss) tp->t_flags2 |= TF2_PLPMTU_PMTUD; else tp->t_flags2 &= ~TF2_PLPMTU_PMTUD; if (tp->t_state == TCPS_SYN_SENT) TCP_PROBE5(connect__request, NULL, tp, ip6, tp, th); TCP_PROBE5(send, NULL, tp, ip6, tp, th); /* TODO: IPv6 IP6TOS_ECT bit on */ error = ip6_output(m, tp->t_inpcb->in6p_outputopts, &inp->inp_route6, ((so->so_options & SO_DONTROUTE) ? IP_ROUTETOIF : 0), NULL, NULL, inp); if (error == EMSGSIZE && inp->inp_route6.ro_rt != NULL) mtu = inp->inp_route6.ro_rt->rt_mtu; } #endif /* INET6 */ #if defined(INET) && defined(INET6) else #endif #ifdef INET { ip->ip_len = htons(m->m_pkthdr.len); #ifdef INET6 if (inp->inp_vflag & INP_IPV6PROTO) ip->ip_ttl = in6_selecthlim(inp, NULL); #endif /* INET6 */ /* * If we do path MTU discovery, then we set DF on every * packet. This might not be the best thing to do according * to RFC3390 Section 2. However the tcp hostcache migitates * the problem so it affects only the first tcp connection * with a host. * * NB: Don't set DF on small MTU/MSS to have a safe * fallback. */ if (V_path_mtu_discovery && tp->t_maxseg > V_tcp_minmss) { tp->t_flags2 |= TF2_PLPMTU_PMTUD; if (tp->t_port == 0 || len < V_tcp_minmss) { ip->ip_off |= htons(IP_DF); } } else { tp->t_flags2 &= ~TF2_PLPMTU_PMTUD; } if (tp->t_state == TCPS_SYN_SENT) TCP_PROBE5(connect__request, NULL, tp, ip, tp, th); TCP_PROBE5(send, NULL, tp, ip, tp, th); error = ip_output(m, tp->t_inpcb->inp_options, &inp->inp_route, ((so->so_options & SO_DONTROUTE) ? IP_ROUTETOIF : 0), 0, inp); if (error == EMSGSIZE && inp->inp_route.ro_rt != NULL) mtu = inp->inp_route.ro_rt->rt_mtu; } #endif /* INET */ out: if (lgb) { lgb->tlb_errno = error; lgb = NULL; } /* * In transmit state, time the transmission and arrange for the * retransmit. In persist state, just set snd_max. */ if (error == 0) { if (TCPS_HAVEESTABLISHED(tp->t_state) && (tp->t_flags & TF_SACK_PERMIT) && tp->rcv_numsacks > 0) - tcp_clean_dsack_blocks(tp); + tcp_clean_dsack_blocks(tp); if (len == 0) counter_u64_add(rack_out_size[TCP_MSS_ACCT_SNDACK], 1); else if (len == 1) { counter_u64_add(rack_out_size[TCP_MSS_ACCT_PERSIST], 1); } else if (len > 1) { int idx; - idx = (len / tp->t_maxseg) + 3; + idx = (len / ctf_fixed_maxseg(tp)) + 3; if (idx >= TCP_MSS_ACCT_ATIMER) counter_u64_add(rack_out_size[(TCP_MSS_ACCT_ATIMER-1)], 1); else counter_u64_add(rack_out_size[idx], 1); } + if (hw_tls && len > 0) { + if (filled_all) { + counter_u64_add(rack_tls_filled, 1); + rack_log_type_hrdwtso(tp, rack, len, 0, orig_len, 1); + } else { + if (rsm) { + counter_u64_add(rack_tls_rxt, 1); + rack_log_type_hrdwtso(tp, rack, len, 2, orig_len, 1); + } else if (doing_tlp) { + counter_u64_add(rack_tls_tlp, 1); + rack_log_type_hrdwtso(tp, rack, len, 3, orig_len, 1); + } else if ( (ctf_outstanding(tp) + rack->r_ctl.rc_pace_min_segs) > sbavail(sb)) { + counter_u64_add(rack_tls_app, 1); + rack_log_type_hrdwtso(tp, rack, len, 4, orig_len, 1); + } else if ((ctf_flight_size(tp, rack->r_ctl.rc_sacked) + rack->r_ctl.rc_pace_min_segs) > tp->snd_cwnd) { + counter_u64_add(rack_tls_cwnd, 1); + rack_log_type_hrdwtso(tp, rack, len, 5, orig_len, 1); + } else if ((ctf_outstanding(tp) + rack->r_ctl.rc_pace_min_segs) > tp->snd_wnd) { + counter_u64_add(rack_tls_rwnd, 1); + rack_log_type_hrdwtso(tp, rack, len, 6, orig_len, 1); + } else { + rack_log_type_hrdwtso(tp, rack, len, 7, orig_len, 1); + counter_u64_add(rack_tls_other, 1); + } + } + } } if (sub_from_prr && (error == 0)) { if (rack->r_ctl.rc_prr_sndcnt >= len) rack->r_ctl.rc_prr_sndcnt -= len; else rack->r_ctl.rc_prr_sndcnt = 0; } sub_from_prr = 0; rack_log_output(tp, &to, len, rack_seq, (uint8_t) flags, error, cts, pass, rsm); + if ((error == 0) && + (len > 0) && + (tp->snd_una == tp->snd_max)) + rack->r_ctl.rc_tlp_rxt_last_time = cts; if ((tp->t_flags & TF_FORCEDATA) == 0 || (rack->rc_in_persist == 0)) { -#ifdef NETFLIX_STATS tcp_seq startseq = tp->snd_nxt; -#endif + /* * Advance snd_nxt over sequence space of this segment. */ if (error) /* We don't log or do anything with errors */ - goto timer; + goto nomore; if (flags & (TH_SYN | TH_FIN)) { if (flags & TH_SYN) tp->snd_nxt++; if (flags & TH_FIN) { tp->snd_nxt++; tp->t_flags |= TF_SENTFIN; } } /* In the ENOBUFS case we do *not* update snd_max */ if (sack_rxmit) - goto timer; + goto nomore; tp->snd_nxt += len; if (SEQ_GT(tp->snd_nxt, tp->snd_max)) { if (tp->snd_una == tp->snd_max) { /* * Update the time we just added data since * none was outstanding. */ rack_log_progress_event(rack, tp, ticks, PROGRESS_START, __LINE__); tp->t_acktime = ticks; } tp->snd_max = tp->snd_nxt; + /* + * Time this transmission if not a retransmission and + * not currently timing anything. + * This is only relevant in case of switching back to + * the base stack. + */ + if (tp->t_rtttime == 0) { + tp->t_rtttime = ticks; + tp->t_rtseq = startseq; + TCPSTAT_INC(tcps_segstimed); + } #ifdef NETFLIX_STATS if (!(tp->t_flags & TF_GPUTINPROG) && len) { tp->t_flags |= TF_GPUTINPROG; tp->gput_seq = startseq; tp->gput_ack = startseq + ulmin(sbavail(sb) - sb_offset, sendwin); tp->gput_ts = tcp_ts_getticks(); } #endif } - /* - * Set retransmit timer if not currently set, and not doing - * a pure ack or a keep-alive probe. Initial value for - * retransmit timer is smoothed round-trip time + 2 * - * round-trip time variance. Initialize shift counter which - * is used for backoff of retransmit time. - */ -timer: - if ((tp->snd_wnd == 0) && - TCPS_HAVEESTABLISHED(tp->t_state)) { - /* - * If the persists timer was set above (right before - * the goto send), and still needs to be on. Lets - * make sure all is canceled. If the persist timer - * is not running, we want to get it up. - */ - if (rack->rc_in_persist == 0) { - rack_enter_persist(tp, rack, cts); - } - } } else { /* * Persist case, update snd_max but since we are in persist * mode (no window) we do not update snd_nxt. */ int32_t xlen = len; if (error) goto nomore; if (flags & TH_SYN) ++xlen; if (flags & TH_FIN) { ++xlen; tp->t_flags |= TF_SENTFIN; } /* In the ENOBUFS case we do *not* update snd_max */ if (SEQ_GT(tp->snd_nxt + xlen, tp->snd_max)) { if (tp->snd_una == tp->snd_max) { /* * Update the time we just added data since * none was outstanding. */ rack_log_progress_event(rack, tp, ticks, PROGRESS_START, __LINE__); tp->t_acktime = ticks; } tp->snd_max = tp->snd_nxt + len; } } nomore: if (error) { SOCKBUF_UNLOCK_ASSERT(sb); /* Check gotos. */ /* * Failures do not advance the seq counter above. For the * case of ENOBUFS we will fall out and retry in 1ms with * the hpts. Everything else will just have to retransmit * with the timer. * * In any case, we do not want to loop around for another * send without a good reason. */ sendalot = 0; switch (error) { case EPERM: tp->t_flags &= ~TF_FORCEDATA; tp->t_softerror = error; return (error); case ENOBUFS: if (slot == 0) { /* * Pace us right away to retry in a some * time */ slot = 1 + rack->rc_enobuf; if (rack->rc_enobuf < 255) rack->rc_enobuf++; if (slot > (rack->rc_rack_rtt / 2)) { slot = rack->rc_rack_rtt / 2; } if (slot < 10) slot = 10; } counter_u64_add(rack_saw_enobuf, 1); error = 0; goto enobufs; case EMSGSIZE: /* * For some reason the interface we used initially * to send segments changed to another or lowered * its MTU. If TSO was active we either got an * interface without TSO capabilits or TSO was * turned off. If we obtained mtu from ip_output() * then update it and try again. */ if (tso) tp->t_flags &= ~TF_TSO; if (mtu != 0) { tcp_mss_update(tp, -1, mtu, NULL, NULL); goto again; } slot = 10; - rack_start_hpts_timer(rack, tp, cts, __LINE__, slot, 0, 1); + rack_start_hpts_timer(rack, tp, cts, slot, 0, 0); tp->t_flags &= ~TF_FORCEDATA; return (error); case ENETUNREACH: counter_u64_add(rack_saw_enetunreach, 1); case EHOSTDOWN: case EHOSTUNREACH: case ENETDOWN: if (TCPS_HAVERCVDSYN(tp->t_state)) { tp->t_softerror = error; } /* FALLTHROUGH */ default: slot = 10; - rack_start_hpts_timer(rack, tp, cts, __LINE__, slot, 0, 1); + rack_start_hpts_timer(rack, tp, cts, slot, 0, 0); tp->t_flags &= ~TF_FORCEDATA; return (error); } } else { rack->rc_enobuf = 0; } TCPSTAT_INC(tcps_sndtotal); /* * Data sent (as far as we can tell). If this advertises a larger * window than any other segment, then remember the size of the * advertised window. Any pending ACK has now been sent. */ if (recwin > 0 && SEQ_GT(tp->rcv_nxt + recwin, tp->rcv_adv)) tp->rcv_adv = tp->rcv_nxt + recwin; tp->last_ack_sent = tp->rcv_nxt; tp->t_flags &= ~(TF_ACKNOW | TF_DELACK); enobufs: rack->r_tlp_running = 0; - if ((flags & TH_RST) || (would_have_fin == 1)) { + if (flags & TH_RST) { /* - * We don't send again after a RST. We also do *not* send - * again if we would have had a find, but now have - * outstanding data. + * We don't send again after sending a RST. */ slot = 0; sendalot = 0; } + if (rsm && (slot == 0)) { + /* + * Dup ack retransmission possibly, so + * lets assure we have at least min rack + * time, if its a rack resend then the rack + * to will also be set to this. + */ + slot = rack->r_ctl.rc_min_to; + } if (slot) { /* set the rack tcb into the slot N */ counter_u64_add(rack_paced_segments, 1); } else if (sendalot) { if (len) counter_u64_add(rack_unpaced_segments, 1); sack_rxmit = 0; tp->t_flags &= ~TF_FORCEDATA; goto again; } else if (len) { counter_u64_add(rack_unpaced_segments, 1); } tp->t_flags &= ~TF_FORCEDATA; - rack_start_hpts_timer(rack, tp, cts, __LINE__, slot, tot_len_this_send, 1); + rack_start_hpts_timer(rack, tp, cts, slot, tot_len_this_send, 0); return (error); } /* * rack_ctloutput() must drop the inpcb lock before performing copyin on * socket option arguments. When it re-acquires the lock after the copy, it * has to revalidate that the connection is still valid for the socket * option. */ static int rack_set_sockopt(struct socket *so, struct sockopt *sopt, struct inpcb *inp, struct tcpcb *tp, struct tcp_rack *rack) { int32_t error = 0, optval; switch (sopt->sopt_name) { case TCP_RACK_PROP_RATE: case TCP_RACK_PROP: case TCP_RACK_TLP_REDUCE: case TCP_RACK_EARLY_RECOV: case TCP_RACK_PACE_ALWAYS: case TCP_DELACK: case TCP_RACK_PACE_REDUCE: case TCP_RACK_PACE_MAX_SEG: case TCP_RACK_PRR_SENDALOT: case TCP_RACK_MIN_TO: case TCP_RACK_EARLY_SEG: case TCP_RACK_REORD_THRESH: case TCP_RACK_REORD_FADE: case TCP_RACK_TLP_THRESH: case TCP_RACK_PKT_DELAY: case TCP_RACK_TLP_USE: case TCP_RACK_TLP_INC_VAR: case TCP_RACK_IDLE_REDUCE_HIGH: case TCP_RACK_MIN_PACE: - case TCP_RACK_MIN_PACE_SEG: + case TCP_RACK_GP_INCREASE: case TCP_BBR_RACK_RTT_USE: + case TCP_BBR_USE_RACK_CHEAT: + case TCP_RACK_DO_DETECTION: case TCP_DATA_AFTER_CLOSE: break; default: return (tcp_default_ctloutput(so, sopt, inp, tp)); break; } INP_WUNLOCK(inp); error = sooptcopyin(sopt, &optval, sizeof(optval), sizeof(optval)); if (error) return (error); INP_WLOCK(inp); if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { INP_WUNLOCK(inp); return (ECONNRESET); } tp = intotcpcb(inp); rack = (struct tcp_rack *)tp->t_fb_ptr; switch (sopt->sopt_name) { + case TCP_RACK_DO_DETECTION: + RACK_OPTS_INC(tcp_rack_no_sack); + if (optval == 0) + rack->do_detection = 0; + else + rack->do_detection = 1; + break; case TCP_RACK_PROP_RATE: if ((optval <= 0) || (optval >= 100)) { error = EINVAL; break; } RACK_OPTS_INC(tcp_rack_prop_rate); rack->r_ctl.rc_prop_rate = optval; break; case TCP_RACK_TLP_USE: if ((optval < TLP_USE_ID) || (optval > TLP_USE_TWO_TWO)) { error = EINVAL; break; } RACK_OPTS_INC(tcp_tlp_use); rack->rack_tlp_threshold_use = optval; break; case TCP_RACK_PROP: /* RACK proportional rate reduction (bool) */ RACK_OPTS_INC(tcp_rack_prop); rack->r_ctl.rc_prop_reduce = optval; break; case TCP_RACK_TLP_REDUCE: /* RACK TLP cwnd reduction (bool) */ RACK_OPTS_INC(tcp_rack_tlp_reduce); rack->r_ctl.rc_tlp_cwnd_reduce = optval; break; case TCP_RACK_EARLY_RECOV: /* Should recovery happen early (bool) */ RACK_OPTS_INC(tcp_rack_early_recov); rack->r_ctl.rc_early_recovery = optval; break; case TCP_RACK_PACE_ALWAYS: /* Use the always pace method (bool) */ RACK_OPTS_INC(tcp_rack_pace_always); if (optval > 0) rack->rc_always_pace = 1; else rack->rc_always_pace = 0; break; case TCP_RACK_PACE_REDUCE: /* RACK Hptsi reduction factor (divisor) */ RACK_OPTS_INC(tcp_rack_pace_reduce); if (optval) /* Must be non-zero */ rack->rc_pace_reduce = optval; else error = EINVAL; break; case TCP_RACK_PACE_MAX_SEG: /* Max segments in a pace */ RACK_OPTS_INC(tcp_rack_max_seg); rack->rc_pace_max_segs = optval; + rack_set_pace_segments(tp, rack); break; case TCP_RACK_PRR_SENDALOT: /* Allow PRR to send more than one seg */ RACK_OPTS_INC(tcp_rack_prr_sendalot); rack->r_ctl.rc_prr_sendalot = optval; break; case TCP_RACK_MIN_TO: /* Minimum time between rack t-o's in ms */ RACK_OPTS_INC(tcp_rack_min_to); rack->r_ctl.rc_min_to = optval; break; case TCP_RACK_EARLY_SEG: /* If early recovery max segments */ RACK_OPTS_INC(tcp_rack_early_seg); rack->r_ctl.rc_early_recovery_segs = optval; break; case TCP_RACK_REORD_THRESH: /* RACK reorder threshold (shift amount) */ RACK_OPTS_INC(tcp_rack_reord_thresh); if ((optval > 0) && (optval < 31)) rack->r_ctl.rc_reorder_shift = optval; else error = EINVAL; break; case TCP_RACK_REORD_FADE: /* Does reordering fade after ms time */ RACK_OPTS_INC(tcp_rack_reord_fade); rack->r_ctl.rc_reorder_fade = optval; break; case TCP_RACK_TLP_THRESH: /* RACK TLP theshold i.e. srtt+(srtt/N) */ RACK_OPTS_INC(tcp_rack_tlp_thresh); if (optval) rack->r_ctl.rc_tlp_threshold = optval; else error = EINVAL; break; + case TCP_BBR_USE_RACK_CHEAT: + RACK_OPTS_INC(tcp_rack_cheat); + if (optval) + rack->use_rack_cheat = 1; + else + rack->use_rack_cheat = 0; + break; case TCP_RACK_PKT_DELAY: /* RACK added ms i.e. rack-rtt + reord + N */ RACK_OPTS_INC(tcp_rack_pkt_delay); rack->r_ctl.rc_pkt_delay = optval; break; case TCP_RACK_TLP_INC_VAR: /* Does TLP include rtt variance in t-o */ - RACK_OPTS_INC(tcp_rack_tlp_inc_var); - rack->r_ctl.rc_prr_inc_var = optval; + return (EINVAL); break; case TCP_RACK_IDLE_REDUCE_HIGH: - RACK_OPTS_INC(tcp_rack_idle_reduce_high); - if (optval) - rack->r_idle_reduce_largest = 1; - else - rack->r_idle_reduce_largest = 0; + return (EINVAL); break; case TCP_DELACK: if (optval == 0) tp->t_delayed_ack = 0; else tp->t_delayed_ack = 1; if (tp->t_flags & TF_DELACK) { tp->t_flags &= ~TF_DELACK; tp->t_flags |= TF_ACKNOW; rack_output(tp); } break; case TCP_RACK_MIN_PACE: RACK_OPTS_INC(tcp_rack_min_pace); if (optval > 3) rack->r_enforce_min_pace = 3; else rack->r_enforce_min_pace = optval; break; - case TCP_RACK_MIN_PACE_SEG: - RACK_OPTS_INC(tcp_rack_min_pace_seg); - if (optval >= 16) - rack->r_min_pace_seg_thresh = 15; + case TCP_RACK_GP_INCREASE: + if ((optval >= 0) && + (optval <= 256)) + rack->rack_per_of_gp = optval; else - rack->r_min_pace_seg_thresh = optval; + error = EINVAL; + break; case TCP_BBR_RACK_RTT_USE: if ((optval != USE_RTT_HIGH) && (optval != USE_RTT_LOW) && (optval != USE_RTT_AVG)) error = EINVAL; else rack->r_ctl.rc_rate_sample_method = optval; break; case TCP_DATA_AFTER_CLOSE: if (optval) rack->rc_allow_data_af_clo = 1; else rack->rc_allow_data_af_clo = 0; break; default: return (tcp_default_ctloutput(so, sopt, inp, tp)); break; } -/* tcp_log_socket_option(tp, sopt->sopt_name, optval, error);*/ +#ifdef NETFLIX_STATS + tcp_log_socket_option(tp, sopt->sopt_name, optval, error); +#endif INP_WUNLOCK(inp); return (error); } static int rack_get_sockopt(struct socket *so, struct sockopt *sopt, struct inpcb *inp, struct tcpcb *tp, struct tcp_rack *rack) { int32_t error, optval; /* * Because all our options are either boolean or an int, we can just * pull everything into optval and then unlock and copy. If we ever * add a option that is not a int, then this will have quite an * impact to this routine. */ switch (sopt->sopt_name) { + case TCP_RACK_DO_DETECTION: + optval = rack->do_detection; + break; + case TCP_RACK_PROP_RATE: optval = rack->r_ctl.rc_prop_rate; break; case TCP_RACK_PROP: /* RACK proportional rate reduction (bool) */ optval = rack->r_ctl.rc_prop_reduce; break; case TCP_RACK_TLP_REDUCE: /* RACK TLP cwnd reduction (bool) */ optval = rack->r_ctl.rc_tlp_cwnd_reduce; break; case TCP_RACK_EARLY_RECOV: /* Should recovery happen early (bool) */ optval = rack->r_ctl.rc_early_recovery; break; case TCP_RACK_PACE_REDUCE: /* RACK Hptsi reduction factor (divisor) */ optval = rack->rc_pace_reduce; break; case TCP_RACK_PACE_MAX_SEG: /* Max segments in a pace */ optval = rack->rc_pace_max_segs; break; case TCP_RACK_PACE_ALWAYS: /* Use the always pace method */ optval = rack->rc_always_pace; break; case TCP_RACK_PRR_SENDALOT: /* Allow PRR to send more than one seg */ optval = rack->r_ctl.rc_prr_sendalot; break; case TCP_RACK_MIN_TO: /* Minimum time between rack t-o's in ms */ optval = rack->r_ctl.rc_min_to; break; case TCP_RACK_EARLY_SEG: /* If early recovery max segments */ optval = rack->r_ctl.rc_early_recovery_segs; break; case TCP_RACK_REORD_THRESH: /* RACK reorder threshold (shift amount) */ optval = rack->r_ctl.rc_reorder_shift; break; case TCP_RACK_REORD_FADE: /* Does reordering fade after ms time */ optval = rack->r_ctl.rc_reorder_fade; break; + case TCP_BBR_USE_RACK_CHEAT: + /* Do we use the rack cheat for rxt */ + optval = rack->use_rack_cheat; + break; case TCP_RACK_TLP_THRESH: /* RACK TLP theshold i.e. srtt+(srtt/N) */ optval = rack->r_ctl.rc_tlp_threshold; break; case TCP_RACK_PKT_DELAY: /* RACK added ms i.e. rack-rtt + reord + N */ optval = rack->r_ctl.rc_pkt_delay; break; case TCP_RACK_TLP_USE: optval = rack->rack_tlp_threshold_use; break; case TCP_RACK_TLP_INC_VAR: /* Does TLP include rtt variance in t-o */ - optval = rack->r_ctl.rc_prr_inc_var; + return (EINVAL); break; case TCP_RACK_IDLE_REDUCE_HIGH: - optval = rack->r_idle_reduce_largest; + return (EINVAL); break; case TCP_RACK_MIN_PACE: optval = rack->r_enforce_min_pace; break; - case TCP_RACK_MIN_PACE_SEG: - optval = rack->r_min_pace_seg_thresh; + case TCP_RACK_GP_INCREASE: + optval = rack->rack_per_of_gp; break; case TCP_BBR_RACK_RTT_USE: optval = rack->r_ctl.rc_rate_sample_method; break; case TCP_DELACK: optval = tp->t_delayed_ack; break; case TCP_DATA_AFTER_CLOSE: optval = rack->rc_allow_data_af_clo; break; default: return (tcp_default_ctloutput(so, sopt, inp, tp)); break; } INP_WUNLOCK(inp); error = sooptcopyout(sopt, &optval, sizeof optval); return (error); } static int rack_ctloutput(struct socket *so, struct sockopt *sopt, struct inpcb *inp, struct tcpcb *tp) { int32_t error = EINVAL; struct tcp_rack *rack; rack = (struct tcp_rack *)tp->t_fb_ptr; if (rack == NULL) { /* Huh? */ goto out; } if (sopt->sopt_dir == SOPT_SET) { return (rack_set_sockopt(so, sopt, inp, tp, rack)); } else if (sopt->sopt_dir == SOPT_GET) { return (rack_get_sockopt(so, sopt, inp, tp, rack)); } out: INP_WUNLOCK(inp); return (error); } -struct tcp_function_block __tcp_rack = { +static struct tcp_function_block __tcp_rack = { .tfb_tcp_block_name = __XSTRING(STACKNAME), .tfb_tcp_output = rack_output, + .tfb_do_queued_segments = ctf_do_queued_segments, + .tfb_do_segment_nounlock = rack_do_segment_nounlock, .tfb_tcp_do_segment = rack_do_segment, .tfb_tcp_ctloutput = rack_ctloutput, .tfb_tcp_fb_init = rack_init, .tfb_tcp_fb_fini = rack_fini, .tfb_tcp_timer_stop_all = rack_stopall, .tfb_tcp_timer_activate = rack_timer_activate, .tfb_tcp_timer_active = rack_timer_active, .tfb_tcp_timer_stop = rack_timer_stop, .tfb_tcp_rexmit_tmr = rack_remxt_tmr, .tfb_tcp_handoff_ok = rack_handoff_ok }; static const char *rack_stack_names[] = { __XSTRING(STACKNAME), #ifdef STACKALIAS __XSTRING(STACKALIAS), #endif }; static int rack_ctor(void *mem, int32_t size, void *arg, int32_t how) { memset(mem, 0, size); return (0); } static void rack_dtor(void *mem, int32_t size, void *arg) { } static bool rack_mod_inited = false; static int tcp_addrack(module_t mod, int32_t type, void *data) { int32_t err = 0; int num_stacks; switch (type) { case MOD_LOAD: rack_zone = uma_zcreate(__XSTRING(MODNAME) "_map", sizeof(struct rack_sendmap), rack_ctor, rack_dtor, NULL, NULL, UMA_ALIGN_PTR, 0); rack_pcb_zone = uma_zcreate(__XSTRING(MODNAME) "_pcb", sizeof(struct tcp_rack), rack_ctor, NULL, NULL, NULL, UMA_ALIGN_CACHE, 0); sysctl_ctx_init(&rack_sysctl_ctx); rack_sysctl_root = SYSCTL_ADD_NODE(&rack_sysctl_ctx, SYSCTL_STATIC_CHILDREN(_net_inet_tcp), OID_AUTO, +#ifdef STACKALIAS + __XSTRING(STACKALIAS), +#else __XSTRING(STACKNAME), +#endif CTLFLAG_RW, 0, ""); if (rack_sysctl_root == NULL) { printf("Failed to add sysctl node\n"); err = EFAULT; goto free_uma; } rack_init_sysctls(); num_stacks = nitems(rack_stack_names); err = register_tcp_functions_as_names(&__tcp_rack, M_WAITOK, rack_stack_names, &num_stacks); if (err) { printf("Failed to register %s stack name for " "%s module\n", rack_stack_names[num_stacks], __XSTRING(MODNAME)); sysctl_ctx_free(&rack_sysctl_ctx); free_uma: uma_zdestroy(rack_zone); uma_zdestroy(rack_pcb_zone); rack_counter_destroy(); printf("Failed to register rack module -- err:%d\n", err); return (err); } + tcp_lro_reg_mbufq(); rack_mod_inited = true; break; case MOD_QUIESCE: err = deregister_tcp_functions(&__tcp_rack, true, false); break; case MOD_UNLOAD: err = deregister_tcp_functions(&__tcp_rack, false, true); if (err == EBUSY) break; if (rack_mod_inited) { uma_zdestroy(rack_zone); uma_zdestroy(rack_pcb_zone); sysctl_ctx_free(&rack_sysctl_ctx); rack_counter_destroy(); rack_mod_inited = false; } + tcp_lro_dereg_mbufq(); err = 0; break; default: return (EOPNOTSUPP); } return (err); } static moduledata_t tcp_rack = { .name = __XSTRING(MODNAME), .evhand = tcp_addrack, .priv = 0 }; MODULE_VERSION(MODNAME, 1); DECLARE_MODULE(MODNAME, tcp_rack, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY); MODULE_DEPEND(MODNAME, tcphpts, 1, 1, 1); Index: head/sys/netinet/tcp_stacks/rack_bbr_common.c =================================================================== --- head/sys/netinet/tcp_stacks/rack_bbr_common.c (revision 352656) +++ head/sys/netinet/tcp_stacks/rack_bbr_common.c (revision 352657) @@ -1,912 +1,924 @@ /*- * Copyright (c) 2016-2018 * Netflix Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ /* * Author: Randall Stewart * This work is based on the ACM Queue paper * BBR - Congestion Based Congestion Control * and also numerous discussions with Neal, Yuchung and Van. */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipsec.h" #include "opt_tcpdebug.h" #include "opt_ratelimit.h" -/*#include "opt_kern_tls.h"*/ +#include "opt_kern_tls.h" #include #include #include #ifdef TCP_HHOOK #include #endif #include #include #include +#include #include #include #ifdef KERN_TLS -#include +#include #endif #include #include #include +#ifdef NETFLIX_STATS +#include /* Must come after qmath.h and tree.h */ +#endif #include #include #include #include #include #include +#include #include #include #include #include #include #include #include #define TCPSTATES /* for logging */ #include #include #include #include #include /* required for icmp_var.h */ #include /* for ICMP_BANDLIM */ #include #include #include #include +#define TCPOUTFLAGS #include #include #include #include #include #include #include #include #include #ifdef TCPDEBUG #include #endif /* TCPDEBUG */ #ifdef TCP_OFFLOAD #include #endif #ifdef INET6 #include #endif #include #include #include #include #if defined(IPSEC) || defined(IPSEC_SUPPORT) #include #include #endif /* IPSEC */ #include #include #include #ifdef MAC #include #endif #include "rack_bbr_common.h" /* * Common TCP Functions - These are shared by borth * rack and BBR. */ #ifdef KERN_TLS uint32_t ctf_get_opt_tls_size(struct socket *so, uint32_t rwnd) { - struct sbtls_info *tls; + struct ktls_session *tls; uint32_t len; again: tls = so->so_snd.sb_tls_info; - len = tls->sb_params.sb_maxlen; /* max tls payload */ - len += tls->sb_params.sb_tls_hlen; /* tls header len */ - len += tls->sb_params.sb_tls_tlen; /* tls trailer len */ + len = tls->params.max_frame_len; /* max tls payload */ + len += tls->params.tls_hlen; /* tls header len */ + len += tls->params.tls_tlen; /* tls trailer len */ if ((len * 4) > rwnd) { /* * Stroke this will suck counter and what * else should we do Drew? From the * TCP perspective I am not sure * what should be done... */ - if (tls->sb_params.sb_maxlen > 4096) { - tls->sb_params.sb_maxlen -= 4096; - if (tls->sb_params.sb_maxlen < 4096) - tls->sb_params.sb_maxlen = 4096; + if (tls->params.max_frame_len > 4096) { + tls->params.max_frame_len -= 4096; + if (tls->params.max_frame_len < 4096) + tls->params.max_frame_len = 4096; goto again; } } return (len); } #endif /* * The function ctf_process_inbound_raw() is used by * transport developers to do the steps needed to * support MBUF Queuing i.e. the flags in * inp->inp_flags2: * * - INP_SUPPORTS_MBUFQ * - INP_MBUF_QUEUE_READY * - INP_DONT_SACK_QUEUE * * These flags help control how LRO will deliver * packets to the transport. You first set in inp_flags2 * the INP_SUPPORTS_MBUFQ to tell the LRO code that you * will gladly take a queue of packets instead of a compressed * single packet. You also set in your t_fb pointer the * tfb_do_queued_segments to point to ctf_process_inbound_raw. * * This then gets you lists of inbound ACK's/Data instead * of a condensed compressed ACK/DATA packet. Why would you * want that? This will get you access to all the arrival * times of at least LRO and possibly at the Hardware (if * the interface card supports that) of the actual ACK/DATA. * In some transport designs this is important since knowing * the actual time we got the packet is useful information. * * Now there are some interesting Caveats that the transport * designer needs to take into account when using this feature. * * 1) It is used with HPTS and pacing, when the pacing timer * for output calls it will first call the input. * 2) When you set INP_MBUF_QUEUE_READY this tells LRO * queue normal packets, I am busy pacing out data and * will process the queued packets before my tfb_tcp_output * call from pacing. If a non-normal packet arrives, (e.g. sack) * you will be awoken immediately. * 3) Finally you can add the INP_DONT_SACK_QUEUE to not even * be awoken if a SACK has arrived. You would do this when * you were not only running a pacing for output timer * but a Rack timer as well i.e. you know you are in recovery * and are in the process (via the timers) of dealing with * the loss. * * Now a critical thing you must be aware of here is that the * use of the flags has a far greater scope then just your * typical LRO. Why? Well thats because in the normal compressed * LRO case at the end of a driver interupt all packets are going * to get presented to the transport no matter if there is one * or 100. With the MBUF_QUEUE model, this is not true. You will * only be awoken to process the queue of packets when: * a) The flags discussed above allow it. * * b) You exceed a ack or data limit (by default the * ack limit is infinity (64k acks) and the data * limit is 64k of new TCP data) * * c) The push bit has been set by the peer */ int ctf_process_inbound_raw(struct tcpcb *tp, struct socket *so, struct mbuf *m, int has_pkt) { /* * We are passed a raw change of mbuf packets * that arrived in LRO. They are linked via * the m_nextpkt link in the pkt-headers. * * We process each one by: * a) saving off the next * b) stripping off the ether-header * c) formulating the arguments for * the tfb_tcp_hpts_do_segment * d) calling each mbuf to tfb_tcp_hpts_do_segment * after adjusting the time to match the arrival time. * Note that the LRO code assures no IP options are present. * * The symantics for calling tfb_tcp_hpts_do_segment are the * following: * 1) It returns 0 if all went well and you (the caller) need * to release the lock. * 2) If nxt_pkt is set, then the function will surpress calls * to tfb_tcp_output() since you are promising to call again * with another packet. * 3) If it returns 1, then you must free all the packets being * shipped in, the tcb has been destroyed (or about to be destroyed). */ struct mbuf *m_save; struct ether_header *eh; struct epoch_tracker et; struct tcphdr *th; #ifdef INET6 struct ip6_hdr *ip6 = NULL; /* Keep compiler happy. */ #endif #ifdef INET struct ip *ip = NULL; /* Keep compiler happy. */ #endif struct ifnet *ifp; struct timeval tv; int32_t retval, nxt_pkt, tlen, off; uint16_t etype; uint16_t drop_hdrlen; uint8_t iptos, no_vn=0, bpf_req=0; /* * This is a bit deceptive, we get the * "info epoch" which is really the network * epoch. This covers us on both any INP * type change but also if the ifp goes * away it covers us as well. */ INP_INFO_RLOCK_ET(&V_tcbinfo, et); if (m && m->m_pkthdr.rcvif) ifp = m->m_pkthdr.rcvif; else ifp = NULL; if (ifp) { bpf_req = bpf_peers_present(ifp->if_bpf); } else { /* * We probably should not work around * but kassert, since lro alwasy sets rcvif. */ no_vn = 1; goto skip_vnet; } CURVNET_SET(ifp->if_vnet); skip_vnet: while (m) { m_save = m->m_nextpkt; m->m_nextpkt = NULL; /* Now lets get the ether header */ eh = mtod(m, struct ether_header *); etype = ntohs(eh->ether_type); /* Let the BPF see the packet */ if (bpf_req && ifp) ETHER_BPF_MTAP(ifp, m); m_adj(m, sizeof(*eh)); /* Trim off the ethernet header */ switch (etype) { #ifdef INET6 case ETHERTYPE_IPV6: { if (m->m_len < (sizeof(*ip6) + sizeof(*th))) { m = m_pullup(m, sizeof(*ip6) + sizeof(*th)); if (m == NULL) { TCPSTAT_INC(tcps_rcvshort); m_freem(m); goto skipped_pkt; } } ip6 = (struct ip6_hdr *)(eh + 1); th = (struct tcphdr *)(ip6 + 1); tlen = ntohs(ip6->ip6_plen); drop_hdrlen = sizeof(*ip6); if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID_IPV6) { if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) th->th_sum = m->m_pkthdr.csum_data; else th->th_sum = in6_cksum_pseudo(ip6, tlen, IPPROTO_TCP, m->m_pkthdr.csum_data); th->th_sum ^= 0xffff; } else th->th_sum = in6_cksum(m, IPPROTO_TCP, drop_hdrlen, tlen); if (th->th_sum) { TCPSTAT_INC(tcps_rcvbadsum); m_freem(m); goto skipped_pkt; } /* * Be proactive about unspecified IPv6 address in source. * As we use all-zero to indicate unbounded/unconnected pcb, * unspecified IPv6 address can be used to confuse us. * * Note that packets with unspecified IPv6 destination is * already dropped in ip6_input. */ if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) { /* XXX stat */ m_freem(m); goto skipped_pkt; } iptos = (ntohl(ip6->ip6_flow) >> 20) & 0xff; break; } #endif #ifdef INET case ETHERTYPE_IP: { if (m->m_len < sizeof (struct tcpiphdr)) { if ((m = m_pullup(m, sizeof (struct tcpiphdr))) == NULL) { TCPSTAT_INC(tcps_rcvshort); m_freem(m); goto skipped_pkt; } } ip = (struct ip *)(eh + 1); th = (struct tcphdr *)(ip + 1); drop_hdrlen = sizeof(*ip); iptos = ip->ip_tos; tlen = ntohs(ip->ip_len) - sizeof(struct ip); if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) { if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR) th->th_sum = m->m_pkthdr.csum_data; else th->th_sum = in_pseudo(ip->ip_src.s_addr, ip->ip_dst.s_addr, htonl(m->m_pkthdr.csum_data + tlen + IPPROTO_TCP)); th->th_sum ^= 0xffff; } else { int len; struct ipovly *ipov = (struct ipovly *)ip; /* * Checksum extended TCP header and data. */ len = drop_hdrlen + tlen; bzero(ipov->ih_x1, sizeof(ipov->ih_x1)); ipov->ih_len = htons(tlen); th->th_sum = in_cksum(m, len); /* Reset length for SDT probes. */ ip->ip_len = htons(len); /* Reset TOS bits */ ip->ip_tos = iptos; /* Re-initialization for later version check */ ip->ip_v = IPVERSION; ip->ip_hl = sizeof(*ip) >> 2; } if (th->th_sum) { TCPSTAT_INC(tcps_rcvbadsum); m_freem(m); goto skipped_pkt; } break; } #endif } /* * Convert TCP protocol specific fields to host format. */ tcp_fields_to_host(th); off = th->th_off << 2; if (off < sizeof (struct tcphdr) || off > tlen) { TCPSTAT_INC(tcps_rcvbadoff); m_freem(m); goto skipped_pkt; } tlen -= off; drop_hdrlen += off; /* * Now lets setup the timeval to be when we should * have been called (if we can). */ m->m_pkthdr.lro_nsegs = 1; - tcp_get_usecs(&tv); + if (m->m_flags & M_TSTMP_LRO) { + tv.tv_sec = m->m_pkthdr.rcv_tstmp /1000000000; + tv.tv_usec = (m->m_pkthdr.rcv_tstmp % 1000000000)/1000; + } else { + /* Should not be should we kassert instead? */ + tcp_get_usecs(&tv); + } /* Now what about next packet? */ if (m_save || has_pkt) nxt_pkt = 1; else nxt_pkt = 0; retval = (*tp->t_fb->tfb_do_segment_nounlock)(m, th, so, tp, drop_hdrlen, tlen, iptos, nxt_pkt, &tv); if (retval) { /* We lost the lock and tcb probably */ m = m_save; - while (m) { + while(m) { m_save = m->m_nextpkt; m->m_nextpkt = NULL; m_freem(m); m = m_save; } if (no_vn == 0) CURVNET_RESTORE(); INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); - return (retval); + return(retval); } skipped_pkt: m = m_save; } if (no_vn == 0) CURVNET_RESTORE(); INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); - return (retval); + return(retval); } int ctf_do_queued_segments(struct socket *so, struct tcpcb *tp, int have_pkt) { struct mbuf *m; /* First lets see if we have old packets */ if (tp->t_in_pkt) { m = tp->t_in_pkt; tp->t_in_pkt = NULL; tp->t_tail_pkt = NULL; if (ctf_process_inbound_raw(tp, so, m, have_pkt)) { /* We lost the tcpcb (maybe a RST came in)? */ - return (1); + return(1); } } return (0); } uint32_t ctf_outstanding(struct tcpcb *tp) { - return (tp->snd_max - tp->snd_una); + return(tp->snd_max - tp->snd_una); } uint32_t ctf_flight_size(struct tcpcb *tp, uint32_t rc_sacked) { if (rc_sacked <= ctf_outstanding(tp)) - return (ctf_outstanding(tp) - rc_sacked); + return(ctf_outstanding(tp) - rc_sacked); else { /* TSNH */ #ifdef INVARIANTS panic("tp:%p rc_sacked:%d > out:%d", tp, rc_sacked, ctf_outstanding(tp)); #endif return (0); } } void ctf_do_dropwithreset(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, int32_t rstreason, int32_t tlen) { if (tp != NULL) { tcp_dropwithreset(m, th, tp, tlen, rstreason); INP_WUNLOCK(tp->t_inpcb); } else tcp_dropwithreset(m, th, NULL, tlen, rstreason); } /* * ctf_drop_checks returns 1 for you should not proceed. It places * in ret_val what should be returned 1/0 by the caller. The 1 indicates * that the TCB is unlocked and probably dropped. The 0 indicates the * TCB is still valid and locked. */ int ctf_drop_checks(struct tcpopt *to, struct mbuf *m, struct tcphdr *th, struct tcpcb *tp, int32_t * tlenp, int32_t * thf, int32_t * drop_hdrlen, int32_t * ret_val) { int32_t todrop; int32_t thflags; int32_t tlen; thflags = *thf; tlen = *tlenp; todrop = tp->rcv_nxt - th->th_seq; if (todrop > 0) { if (thflags & TH_SYN) { thflags &= ~TH_SYN; th->th_seq++; if (th->th_urp > 1) th->th_urp--; else thflags &= ~TH_URG; todrop--; } /* * Following if statement from Stevens, vol. 2, p. 960. */ if (todrop > tlen || (todrop == tlen && (thflags & TH_FIN) == 0)) { /* * Any valid FIN must be to the left of the window. * At this point the FIN must be a duplicate or out * of sequence; drop it. */ thflags &= ~TH_FIN; /* * Send an ACK to resynchronize and drop any data. * But keep on processing for RST or ACK. */ tp->t_flags |= TF_ACKNOW; todrop = tlen; TCPSTAT_INC(tcps_rcvduppack); TCPSTAT_ADD(tcps_rcvdupbyte, todrop); } else { TCPSTAT_INC(tcps_rcvpartduppack); TCPSTAT_ADD(tcps_rcvpartdupbyte, todrop); } /* * DSACK - add SACK block for dropped range */ if (tp->t_flags & TF_SACK_PERMIT) { tcp_update_sack_list(tp, th->th_seq, th->th_seq + todrop); /* * ACK now, as the next in-sequence segment * will clear the DSACK block again */ tp->t_flags |= TF_ACKNOW; } *drop_hdrlen += todrop; /* drop from the top afterwards */ th->th_seq += todrop; tlen -= todrop; if (th->th_urp > todrop) th->th_urp -= todrop; else { thflags &= ~TH_URG; th->th_urp = 0; } } /* * If segment ends after window, drop trailing data (and PUSH and * FIN); if nothing left, just ACK. */ todrop = (th->th_seq + tlen) - (tp->rcv_nxt + tp->rcv_wnd); if (todrop > 0) { TCPSTAT_INC(tcps_rcvpackafterwin); if (todrop >= tlen) { TCPSTAT_ADD(tcps_rcvbyteafterwin, tlen); /* * If window is closed can only take segments at * window edge, and have to drop data and PUSH from * incoming segments. Continue processing, but * remember to ack. Otherwise, drop segment and * ack. */ if (tp->rcv_wnd == 0 && th->th_seq == tp->rcv_nxt) { tp->t_flags |= TF_ACKNOW; TCPSTAT_INC(tcps_rcvwinprobe); } else { ctf_do_dropafterack(m, tp, th, thflags, tlen, ret_val); return (1); } } else TCPSTAT_ADD(tcps_rcvbyteafterwin, todrop); m_adj(m, -todrop); tlen -= todrop; thflags &= ~(TH_PUSH | TH_FIN); } *thf = thflags; *tlenp = tlen; return (0); } /* * The value in ret_val informs the caller * if we dropped the tcb (and lock) or not. * 1 = we dropped it, 0 = the TCB is still locked * and valid. */ void ctf_do_dropafterack(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, int32_t thflags, int32_t tlen, int32_t * ret_val) { /* * Generate an ACK dropping incoming segment if it occupies sequence * space, where the ACK reflects our state. * * We can now skip the test for the RST flag since all paths to this * code happen after packets containing RST have been dropped. * * In the SYN-RECEIVED state, don't send an ACK unless the segment * we received passes the SYN-RECEIVED ACK test. If it fails send a * RST. This breaks the loop in the "LAND" DoS attack, and also * prevents an ACK storm between two listening ports that have been * sent forged SYN segments, each with the source address of the * other. */ if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) && (SEQ_GT(tp->snd_una, th->th_ack) || SEQ_GT(th->th_ack, tp->snd_max))) { *ret_val = 1; ctf_do_dropwithreset(m, tp, th, BANDLIM_RST_OPENPORT, tlen); return; } else *ret_val = 0; tp->t_flags |= TF_ACKNOW; if (m) m_freem(m); } void ctf_do_drop(struct mbuf *m, struct tcpcb *tp) { /* * Drop space held by incoming segment and return. */ if (tp != NULL) INP_WUNLOCK(tp->t_inpcb); if (m) m_freem(m); } int ctf_process_rst(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp) { /* * RFC5961 Section 3.2 * * - RST drops connection only if SEG.SEQ == RCV.NXT. - If RST is in * window, we send challenge ACK. * * Note: to take into account delayed ACKs, we should test against * last_ack_sent instead of rcv_nxt. Note 2: we handle special case * of closed window, not covered by the RFC. */ int dropped = 0; if ((SEQ_GEQ(th->th_seq, (tp->last_ack_sent - 1)) && SEQ_LT(th->th_seq, tp->last_ack_sent + tp->rcv_wnd)) || (tp->rcv_wnd == 0 && tp->last_ack_sent == th->th_seq)) { INP_INFO_RLOCK_ASSERT(&V_tcbinfo); KASSERT(tp->t_state != TCPS_SYN_SENT, ("%s: TH_RST for TCPS_SYN_SENT th %p tp %p", __func__, th, tp)); if (V_tcp_insecure_rst || (tp->last_ack_sent == th->th_seq) || (tp->rcv_nxt == th->th_seq) || ((tp->last_ack_sent - 1) == th->th_seq)) { TCPSTAT_INC(tcps_drops); /* Drop the connection. */ switch (tp->t_state) { case TCPS_SYN_RECEIVED: so->so_error = ECONNREFUSED; goto close; case TCPS_ESTABLISHED: case TCPS_FIN_WAIT_1: case TCPS_FIN_WAIT_2: case TCPS_CLOSE_WAIT: case TCPS_CLOSING: case TCPS_LAST_ACK: so->so_error = ECONNRESET; close: tcp_state_change(tp, TCPS_CLOSED); /* FALLTHROUGH */ default: tp = tcp_close(tp); } dropped = 1; ctf_do_drop(m, tp); } else { TCPSTAT_INC(tcps_badrst); /* Send challenge ACK. */ tcp_respond(tp, mtod(m, void *), th, m, tp->rcv_nxt, tp->snd_nxt, TH_ACK); tp->last_ack_sent = tp->rcv_nxt; } } else { m_freem(m); } return (dropped); } /* * The value in ret_val informs the caller * if we dropped the tcb (and lock) or not. * 1 = we dropped it, 0 = the TCB is still locked * and valid. */ void ctf_challenge_ack(struct mbuf *m, struct tcphdr *th, struct tcpcb *tp, int32_t * ret_val) { INP_INFO_RLOCK_ASSERT(&V_tcbinfo); TCPSTAT_INC(tcps_badsyn); if (V_tcp_insecure_syn && SEQ_GEQ(th->th_seq, tp->last_ack_sent) && SEQ_LT(th->th_seq, tp->last_ack_sent + tp->rcv_wnd)) { tp = tcp_drop(tp, ECONNRESET); *ret_val = 1; ctf_do_drop(m, tp); } else { /* Send challenge ACK. */ tcp_respond(tp, mtod(m, void *), th, m, tp->rcv_nxt, tp->snd_nxt, TH_ACK); tp->last_ack_sent = tp->rcv_nxt; m = NULL; *ret_val = 0; ctf_do_drop(m, NULL); } } /* * bbr_ts_check returns 1 for you should not proceed, the state * machine should return. It places in ret_val what should * be returned 1/0 by the caller (hpts_do_segment). The 1 indicates * that the TCB is unlocked and probably dropped. The 0 indicates the * TCB is still valid and locked. */ int ctf_ts_check(struct mbuf *m, struct tcphdr *th, struct tcpcb *tp, int32_t tlen, int32_t thflags, int32_t * ret_val) { if (tcp_ts_getticks() - tp->ts_recent_age > TCP_PAWS_IDLE) { /* * Invalidate ts_recent. If this segment updates ts_recent, * the age will be reset later and ts_recent will get a * valid value. If it does not, setting ts_recent to zero * will at least satisfy the requirement that zero be placed * in the timestamp echo reply when ts_recent isn't valid. * The age isn't reset until we get a valid ts_recent * because we don't want out-of-order segments to be dropped * when ts_recent is old. */ tp->ts_recent = 0; } else { TCPSTAT_INC(tcps_rcvduppack); TCPSTAT_ADD(tcps_rcvdupbyte, tlen); TCPSTAT_INC(tcps_pawsdrop); *ret_val = 0; if (tlen) { ctf_do_dropafterack(m, tp, th, thflags, tlen, ret_val); } else { ctf_do_drop(m, NULL); } return (1); } return (0); } void ctf_calc_rwin(struct socket *so, struct tcpcb *tp) { int32_t win; /* * Calculate amount of space in receive window, and then do TCP * input processing. Receive window is amount of space in rcv queue, * but not less than advertised window. */ win = sbspace(&so->so_rcv); if (win < 0) win = 0; tp->rcv_wnd = imax(win, (int)(tp->rcv_adv - tp->rcv_nxt)); } void ctf_do_dropwithreset_conn(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, int32_t rstreason, int32_t tlen) { if (tp->t_inpcb) { tcp_set_inp_to_drop(tp->t_inpcb, ETIMEDOUT); } tcp_dropwithreset(m, th, tp, tlen, rstreason); INP_WUNLOCK(tp->t_inpcb); } uint32_t ctf_fixed_maxseg(struct tcpcb *tp) { int optlen; if (tp->t_flags & TF_NOOPT) return (tp->t_maxseg); /* * Here we have a simplified code from tcp_addoptions(), * without a proper loop, and having most of paddings hardcoded. * We only consider fixed options that we would send every * time I.e. SACK is not considered. * */ #define PAD(len) ((((len) / 4) + !!((len) % 4)) * 4) if (TCPS_HAVEESTABLISHED(tp->t_state)) { if (tp->t_flags & TF_RCVD_TSTMP) optlen = TCPOLEN_TSTAMP_APPA; else optlen = 0; #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) if (tp->t_flags & TF_SIGNATURE) optlen += PAD(TCPOLEN_SIGNATURE); #endif } else { if (tp->t_flags & TF_REQ_TSTMP) optlen = TCPOLEN_TSTAMP_APPA; else optlen = PAD(TCPOLEN_MAXSEG); if (tp->t_flags & TF_REQ_SCALE) optlen += PAD(TCPOLEN_WINDOW); #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) if (tp->t_flags & TF_SIGNATURE) optlen += PAD(TCPOLEN_SIGNATURE); #endif if (tp->t_flags & TF_SACK_PERMIT) optlen += PAD(TCPOLEN_SACK_PERMITTED); } #undef PAD optlen = min(optlen, TCP_MAXOLEN); return (tp->t_maxseg - optlen); } void ctf_log_sack_filter(struct tcpcb *tp, int num_sack_blks, struct sackblk *sack_blocks) { if (tp->t_logstate != TCP_LOG_STATE_OFF) { union tcp_log_stackspecific log; struct timeval tv; memset(&log, 0, sizeof(log)); log.u_bbr.timeStamp = tcp_get_usecs(&tv); log.u_bbr.flex8 = num_sack_blks; if (num_sack_blks > 0) { log.u_bbr.flex1 = sack_blocks[0].start; log.u_bbr.flex2 = sack_blocks[0].end; } if (num_sack_blks > 1) { log.u_bbr.flex3 = sack_blocks[1].start; log.u_bbr.flex4 = sack_blocks[1].end; } if (num_sack_blks > 2) { log.u_bbr.flex5 = sack_blocks[2].start; log.u_bbr.flex6 = sack_blocks[2].end; } if (num_sack_blks > 3) { log.u_bbr.applimited = sack_blocks[3].start; log.u_bbr.pkts_out = sack_blocks[3].end; } TCP_LOG_EVENTP(tp, NULL, &tp->t_inpcb->inp_socket->so_rcv, &tp->t_inpcb->inp_socket->so_snd, TCP_SACK_FILTER_RES, 0, 0, &log, false, &tv); } } uint32_t ctf_decay_count(uint32_t count, uint32_t decay) { /* * Given a count, decay it by a set percentage. The * percentage is in thousands i.e. 100% = 1000, * 19.3% = 193. */ uint64_t perc_count, decay_per; uint32_t decayed_count; if (decay > 1000) { /* We don't raise it */ return (count); } perc_count = count; decay_per = decay; perc_count *= decay_per; perc_count /= 1000; /* * So now perc_count holds the * count decay value. */ decayed_count = count - (uint32_t)perc_count; - return (decayed_count); + return(decayed_count); } Index: head/sys/netinet/tcp_stacks/rack_bbr_common.h =================================================================== --- head/sys/netinet/tcp_stacks/rack_bbr_common.h (revision 352656) +++ head/sys/netinet/tcp_stacks/rack_bbr_common.h (revision 352657) @@ -1,117 +1,117 @@ #ifndef __pacer_timer_h__ #define __pacer_timer_h__ /*- - * Copyright (c) 2017 Netflix, Inc. + * Copyright (c) 2017-9 Netflix, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * __FBSDID("$FreeBSD$"); */ /* Common defines and such used by both RACK and BBR */ /* Special values for mss accounting array */ #define TCP_MSS_ACCT_JUSTRET 0 #define TCP_MSS_ACCT_SNDACK 1 #define TCP_MSS_ACCT_PERSIST 2 #define TCP_MSS_ACCT_ATIMER 60 #define TCP_MSS_ACCT_INPACE 61 #define TCP_MSS_ACCT_LATE 62 #define TCP_MSS_SMALL_SIZE_OFF 63 /* Point where small sizes enter */ #define TCP_MSS_ACCT_SIZE 70 #define TCP_MSS_SMALL_MAX_SIZE_DIV (TCP_MSS_ACCT_SIZE - TCP_MSS_SMALL_SIZE_OFF) #define DUP_ACK_THRESHOLD 3 /* Magic flags for tracing progress events */ #define PROGRESS_DROP 1 #define PROGRESS_UPDATE 2 #define PROGRESS_CLEAR 3 #define PROGRESS_START 4 /* RTT sample methods */ #define USE_RTT_HIGH 0 #define USE_RTT_LOW 1 #define USE_RTT_AVG 2 #define PACE_MAX_IP_BYTES 65536 #define USECS_IN_SECOND 1000000 #define MSEC_IN_SECOND 1000 #define MS_IN_USEC 1000 #define USEC_TO_MSEC(x) (x / MS_IN_USEC) #define TCP_TS_OVERHEAD 12 /* Overhead of having Timestamps on */ #ifdef _KERNEL /* We have only 7 bits in rack so assert its true */ CTASSERT((PACE_TMR_MASK & 0x80) == 0); #ifdef KERN_TLS uint32_t ctf_get_opt_tls_size(struct socket *so, uint32_t rwnd); #endif int ctf_process_inbound_raw(struct tcpcb *tp, struct socket *so, struct mbuf *m, int has_pkt); int ctf_do_queued_segments(struct socket *so, struct tcpcb *tp, int have_pkt); uint32_t ctf_outstanding(struct tcpcb *tp); uint32_t ctf_flight_size(struct tcpcb *tp, uint32_t rc_sacked); int ctf_drop_checks(struct tcpopt *to, struct mbuf *m, struct tcphdr *th, struct tcpcb *tp, int32_t * tlenp, int32_t * thf, int32_t * drop_hdrlen, int32_t * ret_val); void ctf_do_dropafterack(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, int32_t thflags, int32_t tlen, int32_t * ret_val); void ctf_do_dropwithreset(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, int32_t rstreason, int32_t tlen); void ctf_do_drop(struct mbuf *m, struct tcpcb *tp); int ctf_process_rst(struct mbuf *m, struct tcphdr *th, struct socket *so, struct tcpcb *tp); void ctf_challenge_ack(struct mbuf *m, struct tcphdr *th, struct tcpcb *tp, int32_t * ret_val); int ctf_ts_check(struct mbuf *m, struct tcphdr *th, struct tcpcb *tp, int32_t tlen, int32_t thflags, int32_t * ret_val); void ctf_calc_rwin(struct socket *so, struct tcpcb *tp); void ctf_do_dropwithreset_conn(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, int32_t rstreason, int32_t tlen); uint32_t ctf_fixed_maxseg(struct tcpcb *tp); void ctf_log_sack_filter(struct tcpcb *tp, int num_sack_blks, struct sackblk *sack_blocks); uint32_t ctf_decay_count(uint32_t count, uint32_t decay_percentage); #endif #endif Index: head/sys/netinet/tcp_stacks/sack_filter.c =================================================================== --- head/sys/netinet/tcp_stacks/sack_filter.c (revision 352656) +++ head/sys/netinet/tcp_stacks/sack_filter.c (revision 352657) @@ -1,704 +1,804 @@ /*- - * Copyright (c) 2017 Netflix, Inc. + * Copyright (c) 2017-9 Netflix, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #ifndef _KERNEL #include #include #include #include #include #include #include #endif #include "sack_filter.h" /* * Sack filter is used to filter out sacks * that have already been processed. The idea * is pretty simple really, consider two sacks * * SACK 1 * cum-ack A * sack B - C * SACK 2 * cum-ack A * sack D - E * sack B - C * * The previous sack information (B-C) is repeated * in SACK 2. If the receiver gets SACK 1 and then * SACK 2 then any work associated with B-C as already * been completed. This only effects where we may have * (as in bbr or rack) cases where we walk a linked list. * * Now the utility trys to keep everything in a single * cache line. This means that its not perfect and * it could be that so big of sack's come that a * "remembered" processed sack falls off the list and * so gets re-processed. Thats ok, it just means we * did some extra work. We could of course take more * cache line hits by expanding the size of this * structure, but then that would cost more. */ #ifndef _KERNEL int detailed_dump = 0; uint64_t cnt_skipped_oldsack = 0; uint64_t cnt_used_oldsack = 0; int highest_used=0; int over_written=0; int empty_avail=0; int no_collapse = 0; FILE *out = NULL; FILE *in = NULL; #endif #define sack_blk_used(sf, i) ((1 << i) & sf->sf_bits) #define sack_blk_set(sf, i) ((1 << i) | sf->sf_bits) #define sack_blk_clr(sf, i) (~(1 << i) & sf->sf_bits) #ifndef _KERNEL static #endif void sack_filter_clear(struct sack_filter *sf, tcp_seq seq) { sf->sf_ack = seq; sf->sf_bits = 0; sf->sf_cur = 0; sf->sf_used = 0; } /* * Given a previous sack filter block, filter out * any entries where the cum-ack moves over them * fully or partially. */ static void sack_filter_prune(struct sack_filter *sf, tcp_seq th_ack) { int32_t i; /* start with the oldest */ for (i = 0; i < SACK_FILTER_BLOCKS; i++) { if (sack_blk_used(sf, i)) { if (SEQ_GT(th_ack, sf->sf_blks[i].end)) { /* This block is consumed */ sf->sf_bits = sack_blk_clr(sf, i); sf->sf_used--; } else if (SEQ_GT(th_ack, sf->sf_blks[i].start)) { /* Some of it is acked */ sf->sf_blks[i].start = th_ack; /* We could in theory break here, but * there are some broken implementations * that send multiple blocks. We want * to catch them all with similar seq's. */ } } } sf->sf_ack = th_ack; } /* * Return true if you find that * the sackblock b is on the score * board. Update it along the way * if part of it is on the board. */ static int32_t is_sack_on_board(struct sack_filter *sf, struct sackblk *b) { int32_t i, cnt; + for (i = sf->sf_cur, cnt=0; cnt < SACK_FILTER_BLOCKS; cnt++) { if (sack_blk_used(sf, i)) { if (SEQ_LT(b->start, sf->sf_ack)) { /* Behind cum-ack update */ b->start = sf->sf_ack; } if (SEQ_LT(b->end, sf->sf_ack)) { /* End back behind too */ b->end = sf->sf_ack; } - if (b->start == b->end) + if (b->start == b->end) { return(1); + } /* Jonathans Rule 1 */ if (SEQ_LEQ(sf->sf_blks[i].start, b->start) && SEQ_GEQ(sf->sf_blks[i].end, b->end)) { /** * Our board has this entirely in * whole or in part: * * board |-------------| * sack |-------------| * * board |-------------| * sack |----| * */ return(1); } /* Jonathans Rule 2 */ if(SEQ_LT(sf->sf_blks[i].end, b->start)) { /** * Not near each other: * * board |---| * sack |---| */ goto nxt_blk; } /* Jonathans Rule 3 */ if (SEQ_GT(sf->sf_blks[i].start, b->end)) { /** * Not near each other: * * board |---| * sack |---| */ goto nxt_blk; } if (SEQ_LEQ(sf->sf_blks[i].start, b->start)) { /** * The board block partial meets: * * board |--------| * sack |----------| * * board |--------| * sack |--------------| * * up with this one (we have part of it). * 1) Update the board block to the new end * and * 2) Update the start of this block to my end. */ b->start = sf->sf_blks[i].end; sf->sf_blks[i].end = b->end; goto nxt_blk; } if (SEQ_GEQ(sf->sf_blks[i].end, b->end)) { /** * The board block partial meets: * * board |--------| * sack |----------| * * board |----| * sack |----------| * 1) Update the board block to the new start * and * 2) Update the start of this block to my end. */ b->end = sf->sf_blks[i].start; sf->sf_blks[i].start = b->start; goto nxt_blk; } } nxt_blk: i++; i %= SACK_FILTER_BLOCKS; } /* Did we totally consume it in pieces? */ if (b->start != b->end) return(0); else return(1); } static int32_t sack_filter_old(struct sack_filter *sf, struct sackblk *in, int numblks) { int32_t num, i; struct sackblk blkboard[TCP_MAX_SACK]; /* * An old sack has arrived. It may contain data * we do not have. We might not have it since * we could have had a lost ack we might have the * entire thing on our current board. We want to prune * off anything we have. With this function though we * won't add to the board. */ for( i = 0, num = 0; isf_blks[i], &sf->sf_blks[idx], sizeof(struct sackblk)); sf->sf_bits = sack_blk_clr(sf, idx); sf->sf_bits = sack_blk_set(sf, i); return; } i++; i %= SACK_FILTER_BLOCKS; } } static int32_t sack_filter_new(struct sack_filter *sf, struct sackblk *in, int numblks, tcp_seq th_ack) { struct sackblk blkboard[TCP_MAX_SACK]; int32_t num, i; /* * First lets trim the old and possibly * throw any away we have. */ for(i=0, num=0; i=0; i--) { - if (is_sack_on_board(sf, &blkboard[i])) + if (is_sack_on_board(sf, &blkboard[i])) { continue; + } /* Add this guy its not listed */ sf->sf_cur++; sf->sf_cur %= SACK_FILTER_BLOCKS; if ((sack_blk_used(sf, sf->sf_cur)) && (sf->sf_used < SACK_FILTER_BLOCKS)) { sack_move_to_empty(sf, sf->sf_cur); } #ifndef _KERNEL if (sack_blk_used(sf, sf->sf_cur)) { over_written++; if (sf->sf_used < SACK_FILTER_BLOCKS) empty_avail++; } #endif memcpy(&sf->sf_blks[sf->sf_cur], &in[i], sizeof(struct sackblk)); if (sack_blk_used(sf, sf->sf_cur) == 0) { sf->sf_used++; #ifndef _KERNEL if (sf->sf_used > highest_used) highest_used = sf->sf_used; #endif sf->sf_bits = sack_blk_set(sf, sf->sf_cur); } } return(numblks); } /* * Given a sack block on the board (the skip index) see if * any other used entries overlap or meet, if so return the index. */ static int32_t sack_blocks_overlap_or_meet(struct sack_filter *sf, struct sackblk *sb, uint32_t skip) { int32_t i; for(i=0; isf_blks[i].end, sb->start) && SEQ_LEQ(sf->sf_blks[i].end, sb->end) && SEQ_LEQ(sf->sf_blks[i].start, sb->start)) { /** * The two board blocks meet: * * board1 |--------| * board2 |----------| * * board1 |--------| * board2 |--------------| * * board1 |--------| * board2 |--------| */ return(i); } if (SEQ_LEQ(sf->sf_blks[i].start, sb->end) && SEQ_GEQ(sf->sf_blks[i].start, sb->start) && SEQ_GEQ(sf->sf_blks[i].end, sb->end)) { /** * The board block partial meets: * * board |--------| * sack |----------| * * board |----| * sack |----------| * 1) Update the board block to the new start * and * 2) Update the start of this block to my end. */ return(i); } } return (-1); } /* * Collapse entry src into entry into * and free up the src entry afterwards. */ static void sack_collapse(struct sack_filter *sf, int32_t src, int32_t into) { if (SEQ_LT(sf->sf_blks[src].start, sf->sf_blks[into].start)) { /* src has a lower starting point */ sf->sf_blks[into].start = sf->sf_blks[src].start; } if (SEQ_GT(sf->sf_blks[src].end, sf->sf_blks[into].end)) { /* src has a higher ending point */ sf->sf_blks[into].end = sf->sf_blks[src].end; } sf->sf_bits = sack_blk_clr(sf, src); sf->sf_used--; } static void sack_board_collapse(struct sack_filter *sf) { int32_t i, j, i_d, j_d; for(i=0; isf_blks[i], i); if (j == -1) { /* No overlap */ continue; } /* * Ok j and i overlap with each other, collapse the * one out furthest away from the current position. */ if (sf->sf_cur > i) i_d = sf->sf_cur - i; else i_d = i - sf->sf_cur; if (sf->sf_cur > j) j_d = sf->sf_cur - j; else j_d = j - sf->sf_cur; if (j_d > i_d) { sack_collapse(sf, j, i); } else sack_collapse(sf, i, j); } } #ifndef _KERNEL +uint64_t saved=0; +uint64_t tot_sack_blks=0; + +static void +sack_filter_dump(FILE *out, struct sack_filter *sf) +{ + int i; + fprintf(out, " sf_ack:%u sf_bits:0x%x c:%d used:%d\n", + sf->sf_ack, sf->sf_bits, + sf->sf_cur, sf->sf_used); + + for(i=0; isf_blks[i].start, + sf->sf_blks[i].end); + } + } +} +#endif + +#ifndef _KERNEL static #endif int -sack_filter_blks(struct sack_filter *sf, struct sackblk *in, int numblks, tcp_seq th_ack) +sack_filter_blks(struct sack_filter *sf, struct sackblk *in, int numblks, + tcp_seq th_ack) { int32_t i, ret; if (numblks > TCP_MAX_SACK) { +#ifdef _KERNEL panic("sf:%p sb:%p Impossible number of sack blocks %d > 4\n", sf, in, numblks); +#endif return(numblks); } +#ifndef _KERNEL + if ((sf->sf_used > 1) && (no_collapse == 0)) + sack_board_collapse(sf); + +#else + if (sf->sf_used > 1) + sack_board_collapse(sf); +#endif if ((sf->sf_used == 0) && numblks) { /* * We are brand new add the blocks in * reverse order. Note we can see more * than one in new, since ack's could be lost. */ + int cnt_added = 0; + sf->sf_ack = th_ack; for(i=(numblks-1), sf->sf_cur=0; i >= 0; i--) { memcpy(&sf->sf_blks[sf->sf_cur], &in[i], sizeof(struct sackblk)); sf->sf_bits = sack_blk_set(sf, sf->sf_cur); sf->sf_cur++; sf->sf_cur %= SACK_FILTER_BLOCKS; sf->sf_used++; + cnt_added++; #ifndef _KERNEL if (sf->sf_used > highest_used) highest_used = sf->sf_used; #endif } if (sf->sf_cur) sf->sf_cur--; - return(numblks); + + return (cnt_added); } if (SEQ_GT(th_ack, sf->sf_ack)) { sack_filter_prune(sf, th_ack); } if (numblks) { if (SEQ_GEQ(th_ack, sf->sf_ack)) { ret = sack_filter_new(sf, in, numblks, th_ack); } else { ret = sack_filter_old(sf, in, numblks); } } else ret = 0; -#ifndef _KERNEL - if ((sf->sf_used > 1) && (no_collapse == 0)) - sack_board_collapse(sf); - -#else - if (sf->sf_used > 1) - sack_board_collapse(sf); - -#endif return (ret); } -#ifndef _KERNEL -uint64_t saved=0; -uint64_t tot_sack_blks=0; - -static void -sack_filter_dump(FILE *out, struct sack_filter *sf) +void +sack_filter_reject(struct sack_filter *sf, struct sackblk *in) { + /* + * Given a specified block (that had made + * it past the sack filter). Reject that + * block triming it off any sack-filter block + * that has it. Usually because the block was + * too small and did not cover a whole send. + * + * This function will only "undo" sack-blocks + * that are fresh and touch the edges of + * blocks in our filter. + */ int i; - fprintf(out, " sf_ack:%u sf_bits:0x%x c:%d used:%d\n", - sf->sf_ack, sf->sf_bits, - sf->sf_cur, sf->sf_used); for(i=0; isf_blks[i].start, - sf->sf_blks[i].end); + if (sack_blk_used(sf, i) == 0) + continue; + /* + * Now given the sack-filter block does it touch + * with one of the ends + */ + if (sf->sf_blks[i].end == in->end) { + /* The end moves back to start */ + if (SEQ_GT(in->start, sf->sf_blks[i].start)) + /* in-blk |----| */ + /* sf-blk |---------| */ + sf->sf_blks[i].end = in->start; + else { + /* It consumes this block */ + /* in-blk |---------| */ + /* sf-blk |------| */ + /* */ + /* sf-blk |---------| */ + sf->sf_bits = sack_blk_clr(sf, i); + sf->sf_used--; + } + continue; } + if (sf->sf_blks[i].start == in->start) { + if (SEQ_LT(in->end, sf->sf_blks[i].end)) { + /* in-blk |----| */ + /* sf-blk |---------| */ + sf->sf_blks[i].start = in->end; + } else { + /* It consumes this block */ + /* in-blk |----------| */ + /* sf-blk |-------| */ + /* */ + /* sf-blk |----------| */ + sf->sf_bits = sack_blk_clr(sf, i); + sf->sf_used--; + } + continue; + } } } +#ifndef _KERNEL + int main(int argc, char **argv) { char buffer[512]; struct sackblk blks[TCP_MAX_SACK]; FILE *err; - tcp_seq th_ack, snd_una; + tcp_seq th_ack, snd_una, snd_max = 0; struct sack_filter sf; int32_t numblks,i; int snd_una_set=0; double a, b, c; - int invalid_sack_print = 0; + int invalid_sack_print = 0; uint32_t chg_remembered=0; uint32_t sack_chg=0; char line_buf[10][256]; int line_buf_at=0; in = stdin; out = stdout; while ((i = getopt(argc, argv, "ndIi:o:?h")) != -1) { switch (i) { case 'n': no_collapse = 1; break; case 'd': detailed_dump = 1; break; case'I': invalid_sack_print = 1; break; case 'i': in = fopen(optarg, "r"); if (in == NULL) { fprintf(stderr, "Fatal error can't open %s for input\n", optarg); exit(-1); } break; case 'o': out = fopen(optarg, "w"); if (out == NULL) { fprintf(stderr, "Fatal error can't open %s for output\n", optarg); exit(-1); } break; default: case '?': case 'h': fprintf(stderr, "Use %s [ -i infile -o outfile -I]\n", argv[0]); return(0); break; }; } sack_filter_clear(&sf, 0); memset(buffer, 0, sizeof(buffer)); memset(blks, 0, sizeof(blks)); numblks = 0; fprintf(out, "************************************\n"); while (fgets(buffer, sizeof(buffer), in) != NULL) { sprintf(line_buf[line_buf_at], "%s", buffer); line_buf_at++; if (strncmp(buffer, "QUIT", 4) == 0) { break; - } else if (strncmp(buffer, "DONE", 4) == 0) { + } else if (strncmp(buffer, "DUMP", 4) == 0) { + sack_filter_dump(out, &sf); + } else if (strncmp(buffer, "MAX:", 4) == 0) { + snd_max = strtoul(&buffer[4], NULL, 0); + } else if (strncmp(buffer, "COMMIT", 6) == 0) { int nn, ii; if (numblks) { uint32_t szof, tot_chg; for(ii=0; ii chg_remembered)){ fprintf(out,"***WARNING WILL RODGERS DANGER!! sack_chg:%u last:%u\n", sack_chg, chg_remembered ); } sack_chg = chg_remembered = 0; } else if (strncmp(buffer, "RXT", 3) == 0) { sack_filter_clear(&sf, snd_una); } else if (strncmp(buffer, "ACK:", 4) == 0) { th_ack = strtoul(&buffer[4], NULL, 0); if (snd_una_set == 0) { snd_una = th_ack; snd_una_set = 1; } else if (SEQ_GT(th_ack, snd_una)) { snd_una = th_ack; } } else if (strncmp(buffer, "EXIT", 4) == 0) { sack_filter_clear(&sf, snd_una); sack_chg = chg_remembered = 0; } else if (strncmp(buffer, "SACK:", 5) == 0) { char *end=NULL; uint32_t start; uint32_t endv; + start = strtoul(&buffer[5], &end, 0); if (end) { endv = strtoul(&end[1], NULL, 0); } else { fprintf(out, "--Sack invalid skip 0 start:%u : ??\n", start); continue; } + if (SEQ_GT(endv, snd_max)) + snd_max = endv; if (SEQ_LT(endv, start)) { fprintf(out, "--Sack invalid skip 1 endv:%u < start:%u\n", endv, start); continue; } if (numblks == TCP_MAX_SACK) { fprintf(out, "--Exceeded max %d\n", numblks); exit(0); } blks[numblks].start = start; blks[numblks].end = endv; numblks++; + } else if (strncmp(buffer, "REJ:n:n", 4) == 0) { + struct sackblk in; + char *end=NULL; + + in.start = strtoul(&buffer[4], &end, 0); + if (end) { + in.end = strtoul(&end[1], NULL, 0); + sack_filter_reject(&sf, &in); + } else + fprintf(out, "Invalid input END:A:B\n"); + } else if (strncmp(buffer, "HELP", 4) == 0) { + fprintf(out, "You can input:\n"); + fprintf(out, "SACK:S:E -- to define a sack block\n"); + fprintf(out, "RXT -- to clear the filter without changing the remembered\n"); + fprintf(out, "EXIT -- To clear the sack filter and start all fresh\n"); + fprintf(out, "ACK:N -- To advance the cum-ack to N\n"); + fprintf(out, "MAX:N -- To set send-max to N\n"); + fprintf(out, "COMMIT -- To apply the sack you built to the filter and dump the filter\n"); + fprintf(out, "DUMP -- To display the current contents of the sack filter\n"); + fprintf(out, "QUIT -- To exit this program\n"); + } else { + fprintf(out, "Command %s unknown\n", buffer); } memset(buffer, 0, sizeof(buffer)); } if (in != stdin) { fclose(in); } if (out != stdout) { fclose(out); } a = saved * 100.0; b = tot_sack_blks * 1.0; if (b > 0.0) c = a/b; else c = 0.0; if (out != stdout) err = stdout; else err = stderr; fprintf(err, "Saved %lu sack blocks out of %lu (%2.3f%%) old_skip:%lu old_usd:%lu high_cnt:%d ow:%d ea:%d\n", saved, tot_sack_blks, c, cnt_skipped_oldsack, cnt_used_oldsack, highest_used, over_written, empty_avail); return(0); } #endif Index: head/sys/netinet/tcp_stacks/sack_filter.h =================================================================== --- head/sys/netinet/tcp_stacks/sack_filter.h (revision 352656) +++ head/sys/netinet/tcp_stacks/sack_filter.h (revision 352657) @@ -1,56 +1,57 @@ #ifndef __sack_filter_h__ #define __sack_filter_h__ /*- - * Copyright (c) 2017 Netflix, Inc. + * Copyright (c) 2017-9 Netflix, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * __FBSDID("$FreeBSD$"); */ /* * Seven entry's is carefully choosen to * fit in one cache line. We can easily * change this to 15 (but it gets very * little extra filtering). To change it * to be larger than 15 would require either * sf_bits becoming a uint32_t and then you * could go to 31.. or change it to a full * bitstring.. It is really doubtful you * will get much benefit beyond 7, in testing * there was a small amount but very very small. */ #define SACK_FILTER_BLOCKS 7 struct sack_filter { tcp_seq sf_ack; uint16_t sf_bits; uint8_t sf_cur; uint8_t sf_used; struct sackblk sf_blks[SACK_FILTER_BLOCKS]; }; #ifdef _KERNEL void sack_filter_clear(struct sack_filter *sf, tcp_seq seq); -int sack_filter_blks(struct sack_filter *sf, struct sackblk *in, int numblks, tcp_seq th_ack); - +int sack_filter_blks(struct sack_filter *sf, struct sackblk *in, int numblks, + tcp_seq th_ack); +void sack_filter_reject(struct sack_filter *sf, struct sackblk *in); #endif #endif Index: head/sys/netinet/tcp_stacks/tcp_bbr.h =================================================================== --- head/sys/netinet/tcp_stacks/tcp_bbr.h (nonexistent) +++ head/sys/netinet/tcp_stacks/tcp_bbr.h (revision 352657) @@ -0,0 +1,845 @@ +/*- + * Copyright (c) 2016-9 + * Netflix Inc. All rights reserved. + * Author Randall R. Stewart + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _NETINET_TCP_BBR_H_ +#define _NETINET_TCP_BBR_H_ + +#define BBR_INITIAL_RTO 1000000 /* 1 second in micro-seconds */ +/* Send map flags */ +#define BBR_ACKED 0x0001 /* The remote endpoint acked this */ +#define BBR_WAS_RENEGED 0x0002 /* The peer reneged the ack */ +#define BBR_RXT_CLEARED 0x0004 /* ACK Cleared by the RXT timer */ +#define BBR_OVERMAX 0x0008 /* We have more retran's then we can + * fit */ +#define BBR_SACK_PASSED 0x0010 /* A sack was done above this block */ +#define BBR_WAS_SACKPASS 0x0020 /* We retransmitted due to SACK pass */ +#define BBR_HAS_FIN 0x0040 /* segment is sent with fin */ +#define BBR_TLP 0x0080 /* segment sent as tail-loss-probe */ +#define BBR_HAS_SYN 0x0100 /* segment has the syn */ +#define BBR_MARKED_LOST 0x0200 /* + * This segments is lost and + * totaled into bbr->rc_ctl.rc_lost + */ +#define BBR_RWND_COLLAPSED 0x0400 /* The peer collapsed the rwnd on the segment */ +#define BBR_NUM_OF_RETRANS 7 + +/* Defines for socket options to set pacing overheads */ +#define BBR_INCL_ENET_OH 0x01 +#define BBR_INCL_IP_OH 0x02 +#define BBR_INCL_TCP_OH 0x03 + +/* + * With the addition of both measurement algorithms + * I had to move over the size of a + * cache line (unfortunately). For now there is + * no way around this. We may be able to cut back + * at some point I hope. + */ +struct bbr_sendmap { + TAILQ_ENTRY(bbr_sendmap) r_next; /* seq number arrayed next */ + TAILQ_ENTRY(bbr_sendmap) r_tnext; /* Time of tmit based next */ + uint32_t r_start; /* Sequence number of the segment */ + uint32_t r_end; /* End seq, this is 1 beyond actually */ + + uint32_t r_rtr_bytes; /* How many bytes have been retransmitted */ + uint32_t r_delivered; /* Delivered amount at send */ + + uint32_t r_del_time; /* The time of the last delivery update */ + uint8_t r_rtr_cnt:4, /* Retran count, index this -1 to get time + * sent */ + unused_bit:1, + r_is_drain:1, /* In a draining cycle */ + r_app_limited:1,/* We went app limited */ + r_ts_valid:1; /* Timestamp field is valid (r_del_ack_ts) */ + uint8_t r_dupack; /* Dup ack count */ + uint8_t r_in_tmap:1, /* Flag to see if its in the r_tnext array */ + r_is_smallmap:1,/* Was logged as a small-map send-map item */ + r_is_gain:1, /* Was in gain cycle */ + r_bbr_state:5; /* The BBR state at send */ + uint8_t r_limit_type; /* is this entry counted against a limit? */ + + uint16_t r_flags; /* Flags as defined above */ + uint16_t r_spare16; + uint32_t r_del_ack_ts; /* At send what timestamp of peer was (if r_ts_valid set) */ + /****************Cache line*****************/ + uint32_t r_tim_lastsent[BBR_NUM_OF_RETRANS]; + /* + * Question, should we instead just grab the sending b/w + * from the filter with the gain and store it in a + * uint64_t instead? + */ + uint32_t r_first_sent_time; /* Time of first pkt in flight sent */ + uint32_t r_pacing_delay; /* pacing delay of this send */ + uint32_t r_flight_at_send; /* flight at the time of the send */ +#ifdef _KERNEL +} __aligned(CACHE_LINE_SIZE); +#else +}; +#endif +#define BBR_LIMIT_TYPE_SPLIT 1 + +TAILQ_HEAD(bbr_head, bbr_sendmap); + +#define BBR_SEGMENT_TIME_SIZE 1500 /* How many bytes in time_between */ + +#define BBR_MIN_SEG 1460 /* MSS size */ +#define BBR_MAX_GAIN_VALUE 0xffff + +#define BBR_TIMER_FUDGE 1500 /* 1.5ms in micro seconds */ + +/* BW twiddle secret codes */ +#define BBR_RED_BW_CONGSIG 0 /* We enter recovery and set using b/w */ +#define BBR_RED_BW_RATECAL 1 /* We are calculating the loss rate */ +#define BBR_RED_BW_USELRBW 2 /* We are dropping the lower b/w with + * cDR */ +#define BBR_RED_BW_SETHIGHLOSS 3 /* We have set our highloss value at + * exit from probe-rtt */ +#define BBR_RED_BW_PE_CLREARLY 4 /* We have decided to clear the + * reduction early */ +#define BBR_RED_BW_PE_CLAFDEL 5 /* We are clearing it on schedule + * delayed */ +#define BBR_RED_BW_REC_ENDCLL 6 /* Recover exits save high if needed + * an clear to start measuring */ +#define BBR_RED_BW_PE_NOEARLY_OUT 7 /* Set pkt epoch judged that we do not + * get out of jail early */ +/* codes for just-return */ +#define BBR_JR_SENT_DATA 0 +#define BBR_JR_CWND_LIMITED 1 +#define BBR_JR_RWND_LIMITED 2 +#define BBR_JR_APP_LIMITED 3 +#define BBR_JR_ASSESSING 4 +/* For calculating a rate */ +#define BBR_CALC_BW 1 +#define BBR_CALC_LOSS 2 + +#define BBR_RTT_BY_TIMESTAMP 0 +#define BBR_RTT_BY_EXACTMATCH 1 +#define BBR_RTT_BY_EARLIER_RET 2 +#define BBR_RTT_BY_THIS_RETRAN 3 +#define BBR_RTT_BY_SOME_RETRAN 4 +#define BBR_RTT_BY_TSMATCHING 5 + +/* Markers to track where we enter persists from */ +#define BBR_PERSISTS_FROM_1 1 +#define BBR_PERSISTS_FROM_2 2 +#define BBR_PERSISTS_FROM_3 3 +#define BBR_PERSISTS_FROM_4 4 +#define BBR_PERSISTS_FROM_5 5 + +/* magic cookies to ask for the RTT */ +#define BBR_RTT_PROP 0 +#define BBR_RTT_RACK 1 +#define BBR_RTT_PKTRTT 2 +#define BBR_SRTT 3 + +#define BBR_SACKED 0 +#define BBR_CUM_ACKED 1 + +/* threshold in useconds where we consider we need a higher min cwnd */ +#define BBR_HIGH_SPEED 1000 +#define BBR_HIGHSPEED_NUM_MSS 12 + +#define MAX_REDUCE_RXT 3 /* What is the maximum times we are willing to + * reduce b/w in RTX's. Setting this has a + * multiplicative effect e.g. if we are + * reducing by 20% then setting it to 3 means + * you will have reduced the b/w estimate by > + * 60% before you stop. */ +/* + * We use the rate sample structure to + * assist in single sack/ack rate and rtt + * calculation. In the future we will expand + * this in BBR to do forward rate sample + * b/w estimation. + */ +#define BBR_RS_RTT_EMPTY 0x00000001 /* Nothing yet stored in RTT's */ +#define BBR_RS_BW_EMPTY 0x00000002 /* Nothing yet stored in cDR */ +#define BBR_RS_RTT_VALID 0x00000004 /* We have at least one valid RTT */ +#define BBR_RS_BW_VAILD 0x00000008 /* We have a valid cDR */ +#define BBR_RS_EMPTY (BBR_RS_RTT_EMPTY|BBR_RS_BW_EMPTY) +struct bbr_rtt_sample { + uint32_t rs_flags; + uint32_t rs_rtt_lowest; + uint32_t rs_rtt_lowest_sendtime; + uint32_t rs_rtt_low_seq_start; + + uint32_t rs_rtt_highest; + uint32_t rs_rtt_cnt; + + uint64_t rs_rtt_tot; + uint32_t cur_rtt; + uint32_t cur_rtt_bytecnt; + + uint32_t cur_rtt_rsmcnt; + uint32_t rc_crtt_set:1, + avail_bits:31; + uint64_t rs_cDR; +}; + +/* RTT shrink reasons */ +#define BBR_RTTS_INIT 0 +#define BBR_RTTS_NEWRTT 1 +#define BBR_RTTS_RTTPROBE 2 +#define BBR_RTTS_WASIDLE 3 +#define BBR_RTTS_PERSIST 4 +#define BBR_RTTS_REACHTAR 5 +#define BBR_RTTS_ENTERPROBE 6 +#define BBR_RTTS_SHRINK_PG 7 +#define BBR_RTTS_SHRINK_PG_FINAL 8 +#define BBR_RTTS_NEW_TARGET 9 +#define BBR_RTTS_LEAVE_DRAIN 10 +#define BBR_RTTS_RESETS_VALUES 11 + +#define BBR_NUM_RATES 5 +/* Rate flags */ +#define BBR_RT_FLAG_FREE 0x00 /* Is on the free list */ +#define BBR_RT_FLAG_INUSE 0x01 /* Has been allocated */ +#define BBR_RT_FLAG_READY 0x02 /* Ready to initiate a measurement. */ +#define BBR_RT_FLAG_CAPPED_PRE 0x04 /* Ready to cap if we send the next segment */ +#define BBR_RT_FLAG_CAPPED 0x08 /* Measurement is capped */ +#define BBR_RT_FLAG_PASTFA 0x10 /* Past the first ack. */ +#define BBR_RT_FLAG_LIMITED 0x20 /* Saw application/cwnd or rwnd limited period */ +#define BBR_RT_SEEN_A_ACK 0x40 /* A ack has been saved */ +#define BBR_RT_PREV_RTT_SET 0x80 /* There was a RTT set in */ +#define BBR_RT_PREV_SEND_TIME 0x100 /* + *There was a RTT send time set that can be used + * no snd_limits + */ +#define BBR_RT_SET_GRADIENT 0x200 +#define BBR_RT_TS_VALID 0x400 + + +struct bbr_log { + union { + struct bbr_sendmap *rsm; /* For alloc/free */ + uint64_t sb_acc; /* For out/ack or t-o */ + }; + struct tcpcb *tp; + uint32_t t_flags; + uint32_t th_seq; + uint32_t th_ack; + uint32_t snd_una; + uint32_t snd_nxt; + uint32_t snd_max; + uint32_t snd_cwnd; + uint32_t snd_wnd; + uint32_t rc_lost; + uint32_t target_cwnd; /* UU */ + uint32_t inflight; /* UU */ + uint32_t applimited; /* UU */ + /* Things for BBR */ + uint32_t delivered; /* UU */ + uint64_t cur_del_rate; /* UU */ + uint64_t delRate; /* UU */ + uint64_t rttProp; /* UU */ + uint64_t lt_bw; /* UU */ + uint32_t timeStamp; + uint32_t time; + uint32_t slot; /* UU */ + uint32_t delayed_by; + uint32_t exp_del; + uint32_t pkts_out; + uint32_t new_win; + uint32_t hptsi_gain; /* UU */ + uint32_t cwnd_gain; /* UU */ + uint32_t epoch; /* UU */ + uint32_t lt_epoch; /* UU */ + /* Sack fun */ + uint32_t blk_start[4]; /* xx */ + uint32_t blk_end[4]; + uint32_t len; /* Timeout T3=1, TLP=2, RACK=3 */ + uint8_t type; + uint8_t n_sackblks; + uint8_t applied; /* UU */ + uint8_t inhpts; /* UU */ + uint8_t ininput; /* UU */ + uint8_t use_lt_bw; /* UU */ +}; + +struct bbr_log_sysctl_out { + uint32_t bbr_log_at; + uint32_t bbr_log_max; + struct bbr_log entries[0]; +}; + +/* + * Magic numbers for logging timeout events if the + * logging is enabled. + */ +#define BBR_TO_FRM_TMR 1 +#define BBR_TO_FRM_TLP 2 +#define BBR_TO_FRM_RACK 3 +#define BBR_TO_FRM_KEEP 4 +#define BBR_TO_FRM_PERSIST 5 +#define BBR_TO_FRM_DELACK 6 + +#define BBR_SEES_STRETCH_ACK 1 +#define BBR_SEES_COMPRESSED_ACKS 2 + + +/* + * As we get each SACK we wade through the + * rc_map and mark off what is acked. + * We also increment rc_sacked as well. + * + * We also pay attention to missing entries + * based on the time and possibly mark them + * for retransmit. If we do and we are not already + * in recovery we enter recovery. In doing + * so we claer prr_delivered/holes_rxt and prr_sent_dur_rec. + * We also setup rc_next/rc_snd_nxt/rc_send_end so + * we will know where to send from. When not in + * recovery rc_next will be NULL and rc_snd_nxt should + * equal snd_max. + * + * Whenever we retransmit from recovery we increment + * rc_holes_rxt as we retran a block and mark it as retransmitted + * with the time it was sent. During non-recovery sending we + * add to our map and note the time down of any send expanding + * the rc_map at the tail and moving rc_snd_nxt up with snd_max. + * + * In recovery during SACK/ACK processing if a chunk has + * been retransmitted and it is now acked, we decrement rc_holes_rxt. + * When we retransmit from the scoreboard we use + * rc_next and rc_snd_nxt/rc_send_end to help us + * find what needs to be retran. + * + * To calculate pipe we simply take (snd_max - snd_una) + rc_holes_rxt + * This gets us the effect of RFC6675 pipe, counting twice for + * bytes retransmitted. + */ + +#define TT_BBR_FR_TMR 0x2001 + +#define BBR_SCALE 8 +#define BBR_UNIT (1 << BBR_SCALE) + +#define BBR_NUM_RTTS_FOR_DEL_LIMIT 8 /* How many pkt-rtts do we keep + * Delivery rate for */ +#define BBR_NUM_RTTS_FOR_GOOG_DEL_LIMIT 10 /* How many pkt-rtts do we keep + * Delivery rate for google */ + +#define BBR_SECONDS_NO_RTT 10 /* 10 seconds with no RTT shrinkage */ +#define BBR_PROBERTT_MAX 200 /* 200ms */ +#define BBR_PROBERTT_NUM_MSS 4 +#define BBR_STARTUP_EPOCHS 3 +#define USECS_IN_MSEC 1000 +#define BBR_TIME_TO_SECONDS(a) (a / USECS_IN_SECOND) +#define BBR_TIME_TO_MILLI(a) (a / MS_IN_USEC) + + +/* BBR keeps time in usec's so we divide by 1000 and round up */ +#define BBR_TS_TO_MS(t) ((t+999)/MS_IN_USEC) + +/* + * Locking for the rack control block. + * a) Locked by INP_WLOCK + * b) Locked by the hpts-mutex + * + */ +#define BBR_STATE_STARTUP 0x01 +#define BBR_STATE_DRAIN 0x02 +#define BBR_STATE_PROBE_BW 0x03 +#define BBR_STATE_PROBE_RTT 0x04 +#define BBR_STATE_IDLE_EXIT 0x05 + +/* Substate defines for STATE == PROBE_BW */ +#define BBR_SUB_GAIN 0 /* State 0 where we are 5/4 BBR_UNIT */ +#define BBR_SUB_DRAIN 1 /* State 1 where we are at 3/4 BBR_UNIT */ +#define BBR_SUB_LEVEL1 2 /* State 1 first BBR_UNIT */ +#define BBR_SUB_LEVEL2 3 /* State 2nd BBR_UNIT */ +#define BBR_SUB_LEVEL3 4 /* State 3rd BBR_UNIT */ +#define BBR_SUB_LEVEL4 5 /* State 4th BBR_UNIT */ +#define BBR_SUB_LEVEL5 6 /* State 5th BBR_UNIT */ +#define BBR_SUB_LEVEL6 7 /* State last BBR_UNIT */ +#define BBR_SUBSTATE_COUNT 8 + +/* Single remaining reduce log */ +#define BBR_REDUCE_AT_FR 5 + +#define BBR_BIG_LOG_SIZE 300000 + +/* Bits per second in bytes per second */ +#define FORTY_EIGHT_MBPS 6000000 /* 48 megabits in bytes */ +#define THIRTY_MBPS 3750000 /* 30 megabits in bytes */ +#define TWENTY_THREE_MBPS 2896000 +#define FIVETWELVE_MBPS 64000000 /* 512 megabits in bytes */ +#define ONE_POINT_TWO_MEG 150000 /* 1.2 megabits in bytes */ + +struct bbr_stats { + uint64_t bbr_badfr; /* 0 */ + uint64_t bbr_badfr_bytes; /* 1 */ + uint64_t bbr_saw_oerr; /* 2 */ + uint64_t bbr_saw_emsgsiz; /* 3 */ + uint64_t bbr_reorder_seen; /* 4 */ + uint64_t bbr_tlp_tot; /* 5 */ + uint64_t bbr_tlp_newdata; /* 6 */ + uint64_t bbr_offset_recovery; /* 7 */ + uint64_t bbr_tlp_retran_fail; /* 8 */ + uint64_t bbr_to_tot; /* 9 */ + uint64_t bbr_to_arm_rack; /* 10 */ + uint64_t bbr_enter_probertt; /* 11 */ + uint64_t bbr_tlp_set; /* 12 */ + uint64_t bbr_resends_set; /* 13 */ + uint64_t bbr_force_output; /* 14 */ + uint64_t bbr_to_arm_tlp; /* 15 */ + uint64_t bbr_paced_segments; /* 16 */ + uint64_t bbr_saw_enobuf; /* 17 */ + uint64_t bbr_to_alloc_failed; /* 18 */ + uint64_t bbr_to_alloc_emerg; /* 19 */ + uint64_t bbr_sack_proc_all; /* 20 */ + uint64_t bbr_sack_proc_short; /* 21 */ + uint64_t bbr_sack_proc_restart; /* 22 */ + uint64_t bbr_to_alloc; /* 23 */ + uint64_t bbr_offset_drop; /* 24 */ + uint64_t bbr_runt_sacks; /* 25 */ + uint64_t bbr_sack_passed; /* 26 */ + uint64_t bbr_rlock_left_ret0; /* 27 */ + uint64_t bbr_rlock_left_ret1; /* 28 */ + uint64_t bbr_dynamic_rwnd; /* 29 */ + uint64_t bbr_static_rwnd; /* 30 */ + uint64_t bbr_sack_blocks; /* 31 */ + uint64_t bbr_sack_blocks_skip; /* 32 */ + uint64_t bbr_sack_search_both; /* 33 */ + uint64_t bbr_sack_search_fwd; /* 34 */ + uint64_t bbr_sack_search_back; /* 35 */ + uint64_t bbr_plain_acks; /* 36 */ + uint64_t bbr_acks_with_sacks; /* 37 */ + uint64_t bbr_progress_drops; /* 38 */ + uint64_t bbr_early; /* 39 */ + uint64_t bbr_reneges_seen; /* 40 */ + uint64_t bbr_persist_reneg; /* 41 */ + uint64_t bbr_dropped_af_data; /* 42 */ + uint64_t bbr_failed_mbuf_aloc; /* 43 */ + uint64_t bbr_cwnd_limited; /* 44 */ + uint64_t bbr_rwnd_limited; /* 45 */ + uint64_t bbr_app_limited; /* 46 */ + uint64_t bbr_force_timer_start; /* 47 */ + uint64_t bbr_hpts_min_time; /* 48 */ + uint64_t bbr_meets_tso_thresh; /* 49 */ + uint64_t bbr_miss_tso_rwnd; /* 50 */ + uint64_t bbr_miss_tso_cwnd; /* 51 */ + uint64_t bbr_miss_tso_app; /* 52 */ + uint64_t bbr_miss_retran; /* 53 */ + uint64_t bbr_miss_tlp; /* 54 */ + uint64_t bbr_miss_unknown; /* 55 */ + uint64_t bbr_hdwr_rl_add_ok; /* 56 */ + uint64_t bbr_hdwr_rl_add_fail; /* 57 */ + uint64_t bbr_hdwr_rl_mod_ok; /* 58 */ + uint64_t bbr_hdwr_rl_mod_fail; /* 59 */ + uint64_t bbr_collapsed_win; /* 60 */ + uint64_t bbr_alloc_limited; /* 61 */ + uint64_t bbr_alloc_limited_conns; /* 62 */ + uint64_t bbr_split_limited; /* 63 */ +}; + +/* + * The structure bbr_opt_stats is a simple + * way to see how many options are being + * changed in the stack. + */ +struct bbr_opts_stats { + uint64_t tcp_bbr_pace_per_sec; + uint64_t tcp_bbr_pace_del_tar; + uint64_t tcp_bbr_pace_seg_max; + uint64_t tcp_bbr_pace_seg_min; + uint64_t tcp_bbr_pace_cross; + uint64_t tcp_bbr_drain_inc_extra; + uint64_t tcp_bbr_unlimited; + uint64_t tcp_bbr_iwintso; + uint64_t tcp_bbr_rec_over_hpts; + uint64_t tcp_bbr_recforce; + uint64_t tcp_bbr_startup_pg; + uint64_t tcp_bbr_drain_pg; + uint64_t tcp_bbr_rwnd_is_app; + uint64_t tcp_bbr_probe_rtt_int; + uint64_t tcp_bbr_one_retran; + uint64_t tcp_bbr_startup_loss_exit; + uint64_t tcp_bbr_use_lowgain; + uint64_t tcp_bbr_lowgain_thresh; + uint64_t tcp_bbr_lowgain_half; + uint64_t tcp_bbr_lowgain_fd; + uint64_t tcp_bbr_usedel_rate; + uint64_t tcp_bbr_min_rto; + uint64_t tcp_bbr_max_rto; + uint64_t tcp_rack_pace_max_seg; + uint64_t tcp_rack_min_to; + uint64_t tcp_rack_reord_thresh; + uint64_t tcp_rack_reord_fade; + uint64_t tcp_rack_tlp_thresh; + uint64_t tcp_rack_pkt_delay; + uint64_t tcp_bbr_startup_exit_epoch; + uint64_t tcp_bbr_ack_comp_alg; + uint64_t tcp_rack_cheat; + uint64_t tcp_iwnd_tso; + uint64_t tcp_utter_max_tso; + uint64_t tcp_hdwr_pacing; + uint64_t tcp_extra_state; + uint64_t tcp_floor_min_tso; + /* New */ + uint64_t tcp_bbr_algorithm; + uint64_t tcp_bbr_tslimits; + uint64_t tcp_bbr_probertt_len; + uint64_t tcp_bbr_probertt_gain; + uint64_t tcp_bbr_topaceout; + uint64_t tcp_use_rackcheat; + uint64_t tcp_delack; + uint64_t tcp_maxpeak; + uint64_t tcp_retran_wtso; + uint64_t tcp_data_ac; + uint64_t tcp_ts_raises; + uint64_t tcp_pacing_oh_tmr; + uint64_t tcp_pacing_oh; + uint64_t tcp_policer_det; +}; + + +#ifdef _KERNEL +#define BBR_STAT_SIZE (sizeof(struct bbr_stats)/sizeof(uint64_t)) +extern counter_u64_t bbr_stat_arry[BBR_STAT_SIZE]; +#define BBR_STAT_ADD(name, amm) counter_u64_add(bbr_stat_arry[(offsetof(struct bbr_stats, name)/sizeof(uint64_t))], (amm)) +#define BBR_STAT_INC(name) BBR_STAT_ADD(name, 1) +#define BBR_OPTS_SIZE (sizeof(struct bbr_stats)/sizeof(uint64_t)) +extern counter_u64_t bbr_opts_arry[BBR_OPTS_SIZE]; +#define BBR_OPTS_ADD(name, amm) counter_u64_add(bbr_opts_arry[(offsetof(struct bbr_opts_stats, name)/sizeof(uint64_t))], (amm)) +#define BBR_OPTS_INC(name) BBR_OPTS_ADD(name, 1) +#endif + +#define BBR_NUM_LOSS_RATES 3 +#define BBR_NUM_BW_RATES 3 + +#define BBR_RECOVERY_LOWRTT 1 +#define BBR_RECOVERY_MEDRTT 2 +#define BBR_RECOVERY_HIGHRTT 3 +#define BBR_RECOVERY_EXTREMERTT 4 + + +struct bbr_control { + /*******************************/ + /* Cache line 2 from bbr start */ + /*******************************/ + struct bbr_head rc_map; /* List of all segments Lock(a) */ + struct bbr_head rc_tmap; /* List in transmit order Lock(a) */ + struct bbr_sendmap *rc_resend; /* something we have been asked to + * resend */ + uint32_t rc_last_delay_val; /* How much we expect to delay Lock(a) */ + uint32_t rc_bbr_hptsi_gain:16, /* Current hptsi gain Lock(a) */ + rc_hpts_flags:16; /* flags on whats on the pacer wheel */ + + uint32_t rc_delivered; /* BRR delivered amount Lock(a) */ + uint32_t rc_hptsi_agg_delay; /* How much time are we behind */ + + uint32_t rc_flight_at_input; + uint32_t rc_lost_bytes; /* Total bytes currently marked lost */ + /*******************************/ + /* Cache line 3 from bbr start */ + /*******************************/ + struct time_filter rc_delrate; + /*******************************/ + /* Cache line 4 from bbr start */ + /*******************************/ + struct bbr_head rc_free; /* List of Free map entries Lock(a) */ + struct bbr_sendmap *rc_tlp_send; /* something we have been + * asked to resend */ + uint32_t rc_del_time; + uint32_t rc_target_at_state; /* Target for a state */ + + uint16_t rc_free_cnt; /* Number of free entries on the rc_free list + * Lock(a) */ + uint16_t rc_startup_pg; + + uint32_t cur_rtt; /* Last RTT from ack */ + + + uint32_t rc_went_idle_time; /* Used for persits to see if its + * probe-rtt qualified */ + uint32_t rc_pace_max_segs:17, /* How much in any single TSO we send Lock(a) */ + rc_pace_min_segs:15; /* The minimum single segment size before we enter persists */ + + uint32_t rc_rtt_shrinks; /* Time of last rtt shrinkage Lock(a) */ + uint32_t r_app_limited_until; + uint32_t rc_timer_exp; /* If a timer ticks of expiry */ + uint32_t rc_rcv_epoch_start; /* Start time of the Epoch Lock(a) */ + + /*******************************/ + /* Cache line 5 from bbr start */ + /*******************************/ + + uint32_t rc_lost_at_pktepoch; /* what the lost value was at the last + * pkt-epoch */ + uint32_t r_measurement_count; /* count of measurement applied lock(a) */ + + + uint32_t rc_last_tlp_seq; /* Last tlp sequence Lock(a) */ + uint16_t rc_reorder_shift; /* Socket option value Lock(a) */ + uint16_t rc_pkt_delay; /* Socket option value Lock(a) */ + + struct bbr_sendmap *rc_sacklast; /* sack remembered place + * Lock(a) */ + struct bbr_sendmap *rc_next; /* remembered place where we next + * retransmit at Lock(a) */ + + uint32_t rc_sacked; /* Tot sacked on scoreboard Lock(a) */ + uint32_t rc_holes_rxt; /* Tot retraned from scoreboard Lock(a) */ + + uint32_t rc_reorder_ts; /* Last time we saw reordering Lock(a) */ + uint32_t rc_init_rwnd; /* Initial rwnd when we transitioned */ + /*- --- + * used only inital and close + */ + uint32_t rc_high_rwnd; /* Highest rwnd seen */ + uint32_t rc_lowest_rtt; /* Smallest RTT we have seen */ + + uint32_t rc_last_rtt; /* Last valid measured RTT that ack'd data */ + uint32_t bbr_cross_over; + + /*******************************/ + /* Cache line 6 from bbr start */ + /*******************************/ + struct sack_filter bbr_sf; + + /*******************************/ + /* Cache line 7 from bbr start */ + /*******************************/ + struct time_filter_small rc_rttprop; + uint32_t last_inbound_ts; /* Peers last timestamp */ + + uint32_t rc_inc_tcp_oh: 1, + rc_inc_ip_oh: 1, + rc_inc_enet_oh:1, + rc_incr_tmrs:1, + restrict_growth:28; + uint32_t rc_lt_epoch_use; /* When we started lt-bw use Lock(a) */ + + uint32_t rc_recovery_start; /* Time we start recovery Lock(a) */ + uint32_t rc_lt_del; /* Delivered at lt bw sampling start Lock(a) */ + + uint64_t rc_bbr_cur_del_rate; /* Current measured delivery rate + * Lock(a) */ + + /*******************************/ + /* Cache line 8 from bbr start */ + /*******************************/ + uint32_t rc_cwnd_on_ent; /* On entry to recovery the cwnd + * Lock(a) */ + uint32_t rc_agg_early; /* aggregate amount early */ + + uint32_t rc_rcvtime; /* When we last received data Lock(a) */ + uint32_t rc_pkt_epoch_del; /* seq num that we need for RTT epoch */ + + uint32_t rc_pkt_epoch; /* Epoch based on packet RTTs */ + uint32_t rc_pkt_epoch_time; /* Time we started the pkt epoch */ + + uint32_t rc_pkt_epoch_rtt; /* RTT using the packet epoch */ + uint32_t rc_rtt_epoch; /* Current RTT epoch, it ticks every rttProp + * Lock(a) */ + uint32_t lowest_rtt; + uint32_t bbr_smallest_srtt_this_state; + + uint32_t rc_lt_epoch; /* LT epoch start of bw_sampling */ + uint32_t rc_lost_at_startup; + + uint32_t rc_bbr_state_atflight; + uint32_t rc_bbr_last_startup_epoch; /* Last startup epoch where we + * increased 20% */ + uint32_t rc_bbr_enters_probertt; /* Timestamp we entered + * probertt Lock(a) */ + uint32_t rc_lt_time; /* Time of lt sampling start Lock(a) */ + + /*******************************/ + /* Cache line 9 from bbr start */ + /*******************************/ + uint64_t rc_lt_bw; /* LT bw calculated Lock(a) */ + uint64_t rc_bbr_lastbtlbw; /* For startup, what was last btlbw I + * saw to check the 20% gain Lock(a) */ + + + uint32_t rc_bbr_cwnd_gain; /* Current cwnd gain Lock(a) */ + uint32_t rc_pkt_epoch_loss_rate; /* pkt-epoch loss rate */ + + uint32_t rc_saved_cwnd; /* Saved cwnd during Probe-rtt drain Lock(a) */ + uint32_t substate_pe; + + uint32_t rc_lost; /* Number of bytes lost Lock(a) */ + uint32_t rc_exta_time_gd; /* How much extra time we got in d/g */ + + uint32_t rc_lt_lost; /* Number of lt bytes lost at sampling start + * Lock(a) */ + uint32_t rc_bbr_state_time; + + uint32_t rc_min_to; /* Socket option value Lock(a) */ + uint32_t rc_initial_hptsi_bw; /* Our initial startup bw Lock(a) */ + + uint32_t bbr_lost_at_state; /* Temp counter debug lost value as we + * enter a state */ + /*******************************/ + /* Cache line 10 from bbr start */ + /*******************************/ + uint32_t rc_level_state_extra; + uint32_t rc_red_cwnd_pe; + const struct tcp_hwrate_limit_table *crte; + uint64_t red_bw; + + uint32_t rc_probertt_int; + uint32_t rc_probertt_srttchktim; /* Time we last did a srtt + * check */ + uint32_t gain_epoch; /* Epoch we should be out of gain */ + uint32_t rc_min_rto_ms; + + uint32_t rc_reorder_fade; /* Socket option value Lock(a) */ + uint32_t last_startup_measure; + + int32_t bbr_hptsi_per_second; + int32_t bbr_hptsi_segments_delay_tar; + + int32_t bbr_hptsi_segments_max; + uint32_t bbr_rttprobe_gain_val; + /*******************************/ + /* Cache line 11 from bbr start */ + /*******************************/ + uint32_t cur_rtt_send_time; /* Time we sent our rtt measured packet */ + uint32_t bbr_peer_tsratio; /* Our calculated ts ratio to multply */ + uint32_t bbr_ts_check_tstmp; /* When we filled it the TS that came on the ack */ + uint32_t bbr_ts_check_our_cts; /* When we filled it the cts of the send */ + uint32_t rc_tlp_rxt_last_time; + uint32_t bbr_smallest_srtt_state2; + uint32_t bbr_hdwr_cnt_noset_snt; /* count of hw pacing sends during delay */ + uint32_t startup_last_srtt; + uint32_t rc_ack_hdwr_delay; + uint32_t highest_hdwr_delay; /* Largest delay we have seen from hardware */ + uint32_t non_gain_extra; + uint32_t recovery_lr; /* The sum of the loss rate from the pe's during recovery */ + uint32_t last_in_probertt; + uint32_t flightsize_at_drain; /* In draining what was the last marked flight size */ + uint32_t rc_pe_of_prtt; /* PE we went into probe-rtt */ + uint32_t ts_in; /* ts that went with the last rtt */ + + uint16_t rc_tlp_seg_send_cnt; /* Number of times we have TLP sent + * rc_last_tlp_seq Lock(a) */ + uint16_t rc_drain_pg; + uint32_t rc_num_maps_alloced; /* num send map entries allocated */ + uint32_t rc_num_split_allocs; /* num split map entries allocated */ + uint16_t rc_num_small_maps_alloced; /* Number of sack blocks + * allocated */ + uint16_t bbr_hptsi_bytes_min; + + uint16_t bbr_hptsi_segments_floor; + uint16_t bbr_utter_max; + uint16_t bbr_google_discount; + +}; + + +struct socket; +struct tcp_bbr { + /* First cache line 0x00 */ + int32_t(*r_substate) (struct mbuf *, struct tcphdr *, + struct socket *, struct tcpcb *, struct tcpopt *, + int32_t, int32_t, uint32_t, int32_t, int32_t); /* Lock(a) */ + struct tcpcb *rc_tp; /* The tcpcb Lock(a) */ + struct inpcb *rc_inp; /* The inpcb Lock(a) */ + struct timeval rc_tv; + uint32_t rc_pacer_started; /* Time we started the pacer */ + uint16_t no_pacing_until:8, /* No pacing until N packet epochs */ + ts_can_raise:1,/* TS b/w calculations can raise the bw higher */ + skip_gain:1, /* Skip the gain cycle (hardware pacing) */ + gain_is_limited:1, /* With hardware pacing we are limiting gain */ + output_error_seen:1, + oerror_cnt:4, + hw_pacing_set:1; /* long enough has passed for us to start pacing */ + uint16_t xxx_r_ack_count; /* During recovery count of ack's received + * that added data since output */ + uint16_t bbr_segs_rcvd; /* In Segment count since we sent a ack */ + + uint8_t bbr_timer_src:4, /* Used for debugging Lock(a) */ + bbr_use_rack_cheat:1, /* Use the rack cheat */ + bbr_init_win_cheat:1, /* Send full IW for TSO */ + bbr_attempt_hdwr_pace:1,/* Try to do hardware pacing */ + bbr_hdrw_pacing:1; /* Hardware pacing is available */ + uint8_t bbr_hdw_pace_ena:1, /* Does the connection allow hardware pacing to be attempted */ + bbr_prev_in_rec:1, /* We were previously in recovery */ + pkt_conservation:1, + use_policer_detection:1, + xxx_bbr_hdw_pace_idx:4; /* If hardware pacing is on, index to slot in pace tbl */ + uint16_t r_wanted_output:1, + rtt_valid:1, + rc_timer_first:1, + rc_output_starts_timer:1, + rc_resends_use_tso:1, + rc_all_timers_stopped:1, + rc_loss_exit:1, + rc_ack_was_delayed:1, + rc_lt_is_sampling:1, + rc_filled_pipe:1, + rc_tlp_new_data:1, + rc_hit_state_1:1, + rc_ts_valid:1, + rc_prtt_set_ts:1, + rc_is_pkt_epoch_now:1, + rc_has_collapsed:1; + + uint8_t r_state:4, /* Current bbr state Lock(a) */ + r_agg_early_set:1, /* Did we get called early */ + r_init_rtt:1, + r_use_policer:1, /* For google mode only */ + r_recovery_bw:1; + uint8_t r_timer_override:1, /* pacer override Lock(a) 0/1 */ + rc_in_persist:1, + rc_lt_use_bw:1, + rc_allow_data_af_clo:1, + rc_tlp_rtx_out:1, /* A TLP is in flight */ + rc_tlp_in_progress:1, /* a TLP timer is running needed? */ + rc_use_idle_restart:1; /* Do we restart fast after idle (persist or applim) */ + uint8_t rc_bbr_state:3, /* What is the major BBR state */ + rc_bbr_substate:3, /* For probeBW state */ + r_is_v6:1, + rc_past_init_win:1; + uint8_t rc_last_options; + uint8_t rc_tlp_threshold; /* Socket option value Lock(a) */ + uint8_t rc_max_rto_sec; + uint8_t rc_cwnd_limited:1, /* We are cwnd limited */ + rc_tmr_stopped:7; /* What timers have been stopped */ + uint8_t rc_use_google:1, + rc_use_ts_limit:1, + rc_ts_data_set:1, /* We have filled a set point to determine */ + rc_ts_clock_set:1, /* We have determined the ts type */ + rc_ts_cant_be_used:1, /* We determined we can't use ts values */ + rc_ack_is_cumack:1, + rc_no_pacing:1, + alloc_limit_reported:1; + uint8_t rc_init_win; + /* Cache line 2 0x40 */ + struct bbr_control r_ctl; +#ifdef _KERNEL +} __aligned(CACHE_LINE_SIZE); +#else +}; +#endif + +#endif Property changes on: head/sys/netinet/tcp_stacks/tcp_bbr.h ___________________________________________________________________ Added: svn:eol-style ## -0,0 +1 ## +native \ No newline at end of property Added: svn:keywords ## -0,0 +1 ## +FreeBSD=%H \ No newline at end of property Added: svn:mime-type ## -0,0 +1 ## +text/plain \ No newline at end of property Index: head/sys/netinet/tcp_stacks/tcp_rack.h =================================================================== --- head/sys/netinet/tcp_stacks/tcp_rack.h (revision 352656) +++ head/sys/netinet/tcp_stacks/tcp_rack.h (revision 352657) @@ -1,323 +1,347 @@ /*- - * Copyright (c) 2016 Netflix, Inc. + * Copyright (c) 2016-9 Netflix, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _NETINET_TCP_RACK_H_ #define _NETINET_TCP_RACK_H_ -#define RACK_ACKED 0x0001/* The remote endpoint acked this */ -#define RACK_TO_MIXED 0x0002/* A timeout occured that mixed the send order */ -#define RACK_DEFERRED 0x0004/* We can't use this for RTT calc */ -#define RACK_OVERMAX 0x0008/* We have more retran's then we can fit */ -#define RACK_SACK_PASSED 0x0010/* A sack was done above this block */ -#define RACK_WAS_SACKPASS 0x0020/* We retransmitted due to SACK pass */ -#define RACK_HAS_FIN 0x0040/* segment is sent with fin */ -#define RACK_TLP 0x0080/* segment sent as tail-loss-probe */ - +#define RACK_ACKED 0x0001/* The remote endpoint acked this */ +#define RACK_TO_MIXED 0x0002/* A timeout occured that mixed the send order - not used */ +#define RACK_DEFERRED 0x0004/* We can't use this for RTT calc - not used */ +#define RACK_OVERMAX 0x0008/* We have more retran's then we can fit */ +#define RACK_SACK_PASSED 0x0010/* A sack was done above this block */ +#define RACK_WAS_SACKPASS 0x0020/* We retransmitted due to SACK pass */ +#define RACK_HAS_FIN 0x0040/* segment is sent with fin */ +#define RACK_TLP 0x0080/* segment sent as tail-loss-probe */ +#define RACK_RWND_COLLAPSED 0x0100/* The peer collapsed the rwnd on the segment */ #define RACK_NUM_OF_RETRANS 3 #define RACK_INITIAL_RTO 1000 /* 1 second in milli seconds */ struct rack_sendmap { - TAILQ_ENTRY(rack_sendmap) r_next; /* seq number arrayed next */ - TAILQ_ENTRY(rack_sendmap) r_tnext; /* Time of transmit based next */ - uint32_t r_tim_lastsent[RACK_NUM_OF_RETRANS]; uint32_t r_start; /* Sequence number of the segment */ uint32_t r_end; /* End seq, this is 1 beyond actually */ + TAILQ_ENTRY(rack_sendmap) r_tnext; /* Time of transmit based next */ + RB_ENTRY(rack_sendmap) r_next; /* RB Tree next */ uint32_t r_rtr_bytes; /* How many bytes have been retransmitted */ uint16_t r_rtr_cnt; /* Retran count, index this -1 to get time * sent */ - uint8_t r_flags; /* Flags as defined above */ - uint8_t r_sndcnt; /* Retran count, not limited by - * RACK_NUM_OF_RETRANS */ + uint16_t r_flags; /* Flags as defined above */ + uint32_t r_tim_lastsent[RACK_NUM_OF_RETRANS]; + uint8_t r_dupack; /* Dup ack count */ uint8_t r_in_tmap; /* Flag to see if its in the r_tnext array */ uint8_t r_limit_type; /* is this entry counted against a limit? */ - uint8_t r_resv[2]; + uint8_t r_resv[49]; }; -#define RACK_LIMIT_TYPE_SPLIT 1 +RB_HEAD(rack_rb_tree_head, rack_sendmap); TAILQ_HEAD(rack_head, rack_sendmap); +#define RACK_LIMIT_TYPE_SPLIT 1 /* * We use the rate sample structure to * assist in single sack/ack rate and rtt * calculation. In the future we will expand * this in BBR to do forward rate sample * b/w estimation. */ #define RACK_RTT_EMPTY 0x00000001 /* Nothing yet stored in RTT's */ #define RACK_RTT_VALID 0x00000002 /* We have at least one valid RTT */ struct rack_rtt_sample { uint32_t rs_flags; uint32_t rs_rtt_lowest; uint32_t rs_rtt_highest; uint32_t rs_rtt_cnt; uint64_t rs_rtt_tot; }; #define RACK_LOG_TYPE_ACK 0x01 #define RACK_LOG_TYPE_OUT 0x02 #define RACK_LOG_TYPE_TO 0x03 #define RACK_LOG_TYPE_ALLOC 0x04 #define RACK_LOG_TYPE_FREE 0x05 struct rack_log { union { struct rack_sendmap *rsm; /* For alloc/free */ uint64_t sb_acc;/* For out/ack or t-o */ }; uint32_t th_seq; uint32_t th_ack; uint32_t snd_una; uint32_t snd_nxt; /* th_win for TYPE_ACK */ uint32_t snd_max; uint32_t blk_start[4]; uint32_t blk_end[4]; uint8_t type; uint8_t n_sackblks; uint16_t len; /* Timeout T3=1, TLP=2, RACK=3 */ }; /* * Magic numbers for logging timeout events if the * logging is enabled. */ #define RACK_TO_FRM_TMR 1 #define RACK_TO_FRM_TLP 2 #define RACK_TO_FRM_RACK 3 #define RACK_TO_FRM_KEEP 4 #define RACK_TO_FRM_PERSIST 5 #define RACK_TO_FRM_DELACK 6 struct rack_opts_stats { uint64_t tcp_rack_prop_rate; uint64_t tcp_rack_prop; uint64_t tcp_rack_tlp_reduce; uint64_t tcp_rack_early_recov; uint64_t tcp_rack_pace_always; uint64_t tcp_rack_pace_reduce; uint64_t tcp_rack_max_seg; uint64_t tcp_rack_prr_sendalot; uint64_t tcp_rack_min_to; uint64_t tcp_rack_early_seg; uint64_t tcp_rack_reord_thresh; uint64_t tcp_rack_reord_fade; uint64_t tcp_rack_tlp_thresh; uint64_t tcp_rack_pkt_delay; uint64_t tcp_rack_tlp_inc_var; uint64_t tcp_tlp_use; uint64_t tcp_rack_idle_reduce; uint64_t tcp_rack_idle_reduce_high; uint64_t rack_no_timer_in_hpts; uint64_t tcp_rack_min_pace_seg; uint64_t tcp_rack_min_pace; + uint64_t tcp_rack_cheat; + uint64_t tcp_rack_no_sack; }; #define TLP_USE_ID 1 /* Internet draft behavior */ #define TLP_USE_TWO_ONE 2 /* Use 2.1 behavior */ #define TLP_USE_TWO_TWO 3 /* Use 2.2 behavior */ #ifdef _KERNEL #define RACK_OPTS_SIZE (sizeof(struct rack_opts_stats)/sizeof(uint64_t)) extern counter_u64_t rack_opts_arry[RACK_OPTS_SIZE]; #define RACK_OPTS_ADD(name, amm) counter_u64_add(rack_opts_arry[(offsetof(struct rack_opts_stats, name)/sizeof(uint64_t))], (amm)) #define RACK_OPTS_INC(name) RACK_OPTS_ADD(name, 1) #endif /* * As we get each SACK we wade through the * rc_map and mark off what is acked. * We also increment rc_sacked as well. * * We also pay attention to missing entries * based on the time and possibly mark them * for retransmit. If we do and we are not already * in recovery we enter recovery. In doing * so we claer prr_delivered/holes_rxt and prr_sent_dur_rec. * We also setup rc_next/rc_snd_nxt/rc_send_end so * we will know where to send from. When not in * recovery rc_next will be NULL and rc_snd_nxt should * equal snd_max. * * Whenever we retransmit from recovery we increment * rc_holes_rxt as we retran a block and mark it as retransmitted * with the time it was sent. During non-recovery sending we * add to our map and note the time down of any send expanding * the rc_map at the tail and moving rc_snd_nxt up with snd_max. * * In recovery during SACK/ACK processing if a chunk has * been retransmitted and it is now acked, we decrement rc_holes_rxt. * When we retransmit from the scoreboard we use * rc_next and rc_snd_nxt/rc_send_end to help us * find what needs to be retran. * * To calculate pipe we simply take (snd_max - snd_una) + rc_holes_rxt * This gets us the effect of RFC6675 pipe, counting twice for * bytes retransmitted. */ #define TT_RACK_FR_TMR 0x2000 /* * Locking for the rack control block. * a) Locked by INP_WLOCK * b) Locked by the hpts-mutex * */ +#define RACK_GP_HIST 4 /* How much goodput history do we maintain? */ struct rack_control { /* Second cache line 0x40 from tcp_rack */ - struct rack_head rc_map;/* List of all segments Lock(a) */ + struct rack_rb_tree_head rc_mtree; /* Tree of all segments Lock(a) */ struct rack_head rc_tmap; /* List in transmit order Lock(a) */ struct rack_sendmap *rc_tlpsend; /* Remembered place for * tlp_sending Lock(a) */ struct rack_sendmap *rc_resend; /* something we have been asked to * resend */ + struct timeval rc_last_time_decay; /* SAD time decay happened here */ + uint32_t input_pkt; + uint32_t saved_input_pkt; uint32_t rc_hpts_flags; uint32_t rc_timer_exp; /* If a timer ticks of expiry */ uint32_t rc_rack_min_rtt; /* lowest RTT seen Lock(a) */ uint32_t rc_rack_largest_cwnd; /* Largest CWND we have seen Lock(a) */ /* Third Cache line 0x80 */ struct rack_head rc_free; /* Allocation array */ uint32_t rc_time_last_sent; /* Time we last sent some data and * logged it Lock(a). */ uint32_t rc_reorder_ts; /* Last time we saw reordering Lock(a) */ uint32_t rc_tlp_new_data; /* we need to send new-data on a TLP * Lock(a) */ uint32_t rc_prr_out; /* bytes sent during recovery Lock(a) */ uint32_t rc_prr_recovery_fs; /* recovery fs point Lock(a) */ uint32_t rc_prr_sndcnt; /* Prr sndcnt Lock(a) */ uint32_t rc_sacked; /* Tot sacked on scoreboard Lock(a) */ uint32_t rc_last_tlp_seq; /* Last tlp sequence Lock(a) */ uint32_t rc_prr_delivered; /* during recovery prr var Lock(a) */ uint16_t rc_tlp_send_cnt; /* Number of TLP sends we have done * since peer spoke to us Lock(a) */ uint16_t rc_tlp_seg_send_cnt; /* Number of times we have TLP sent * rc_last_tlp_seq Lock(a) */ uint32_t rc_loss_count; /* During recovery how many segments were lost * Lock(a) */ uint32_t rc_reorder_fade; /* Socket option value Lock(a) */ /* Forth cache line 0xc0 */ /* Times */ uint32_t rc_rack_tmit_time; /* Rack transmit time Lock(a) */ uint32_t rc_holes_rxt; /* Tot retraned from scoreboard Lock(a) */ /* Variables to track bad retransmits and recover */ uint32_t rc_rsm_start; /* RSM seq number we retransmitted Lock(a) */ uint32_t rc_cwnd_at; /* cwnd at the retransmit Lock(a) */ uint32_t rc_ssthresh_at;/* ssthresh at the retransmit Lock(a) */ uint32_t rc_num_maps_alloced; /* Number of map blocks (sacks) we * have allocated */ uint32_t rc_rcvtime; /* When we last received data */ uint32_t rc_num_split_allocs; /* num split map entries allocated */ + uint32_t rc_last_output_to; uint32_t rc_went_idle_time; struct rack_sendmap *rc_sacklast; /* sack remembered place * Lock(a) */ - struct rack_sendmap *rc_next; /* remembered place where we next - * retransmit at Lock(a) */ struct rack_sendmap *rc_rsm_at_retran; /* Debug variable kept for * cache line alignment * Lock(a) */ + struct timeval rc_last_ack; /* Cache line split 0x100 */ struct sack_filter rack_sf; /* Cache line split 0x140 */ /* Flags for various things */ + uint32_t rc_pace_max_segs; + uint32_t rc_pace_min_segs; + uint32_t rc_high_rwnd; + uint32_t ack_count; + uint32_t sack_count; + uint32_t sack_noextra_move; + uint32_t sack_moved_extra; struct rack_rtt_sample rack_rs; + uint32_t rc_tlp_rxt_last_time; + uint32_t rc_saved_cwnd; + uint32_t rc_gp_history[RACK_GP_HIST]; uint32_t rc_tlp_threshold; /* Socket option value Lock(a) */ uint16_t rc_early_recovery_segs; /* Socket option value Lock(a) */ uint16_t rc_reorder_shift; /* Socket option value Lock(a) */ uint16_t rc_pkt_delay; /* Socket option value Lock(a) */ uint8_t rc_prop_rate; /* Socket option value Lock(a) */ uint8_t rc_prop_reduce; /* Socket option value Lock(a) */ uint8_t rc_tlp_cwnd_reduce; /* Socket option value Lock(a) */ uint8_t rc_early_recovery; /* Socket option value Lock(a) */ uint8_t rc_prr_sendalot;/* Socket option value Lock(a) */ uint8_t rc_min_to; /* Socket option value Lock(a) */ - uint8_t rc_prr_inc_var; /* Socket option value Lock(a) */ uint8_t rc_tlp_rtx_out; /* This is TLPRtxOut in the draft */ uint8_t rc_rate_sample_method; + uint8_t rc_gp_hist_idx: 7, + rc_gp_hist_filled: 1; + }; #ifdef _KERNEL struct tcp_rack { /* First cache line 0x00 */ TAILQ_ENTRY(tcp_rack) r_hpts; /* hptsi queue next Lock(b) */ int32_t(*r_substate) (struct mbuf *, struct tcphdr *, struct socket *, struct tcpcb *, struct tcpopt *, int32_t, int32_t, uint32_t, int, int); /* Lock(a) */ struct tcpcb *rc_tp; /* The tcpcb Lock(a) */ struct inpcb *rc_inp; /* The inpcb Lock(a) */ uint32_t rc_free_cnt; /* Number of free entries on the rc_free list * Lock(a) */ uint32_t rc_rack_rtt; /* RACK-RTT Lock(a) */ uint16_t r_wanted_output; /* Output routine wanted to be called */ uint16_t r_cpu; /* CPU that the INP is running on Lock(a) */ uint16_t rc_pace_max_segs; /* Socket option value Lock(a) */ uint16_t rc_pace_reduce;/* Socket option value Lock(a) */ uint8_t r_state; /* Current rack state Lock(a) */ uint8_t rc_tmr_stopped : 7, t_timers_stopped : 1; uint8_t rc_enobuf; /* count of enobufs on connection provides * backoff Lock(a) */ uint8_t r_timer_override : 1, /* hpts override Lock(a) */ r_tlp_running : 1, /* Running from a TLP timeout Lock(a) */ r_is_v6 : 1, /* V6 pcb Lock(a) */ rc_in_persist : 1, rc_last_pto_set : 1, /* XXX not used */ rc_tlp_in_progress : 1, rc_always_pace : 1, /* Socket option value Lock(a) */ - rc_timer_up : 1; /* The rack timer is up flag Lock(a) */ - uint8_t r_idle_reduce_largest : 1, - r_enforce_min_pace : 2, - r_min_pace_seg_thresh : 5; + tlp_timer_up : 1; /* The tlp timer is up flag Lock(a) */ + uint8_t r_enforce_min_pace : 2, + rc_has_collapsed : 1, + r_rep_attack : 1, + r_rep_reverse : 1, + r_xxx_min_pace_seg_thresh : 3; uint8_t rack_tlp_threshold_use; uint8_t rc_allow_data_af_clo: 1, delayed_ack : 1, + set_pacing_done_a_iw : 1, + use_rack_cheat : 1, alloc_limit_reported : 1, - rc_avail : 5; - uint8_t r_resv[2]; /* Fill to cache line boundary */ + sack_attack_disable : 1, + do_detection : 1, + rc_avail : 1; + uint16_t rack_per_of_gp; /* Cache line 2 0x40 */ struct rack_control r_ctl; } __aligned(CACHE_LINE_SIZE); #endif #endif Index: head/sys/sys/mbuf.h =================================================================== --- head/sys/sys/mbuf.h (revision 352656) +++ head/sys/sys/mbuf.h (revision 352657) @@ -1,1526 +1,1526 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 1988, 1993 * The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)mbuf.h 8.5 (Berkeley) 2/19/95 * $FreeBSD$ */ #ifndef _SYS_MBUF_H_ #define _SYS_MBUF_H_ /* XXX: These includes suck. Sorry! */ #include #ifdef _KERNEL #include #include #include #ifdef WITNESS #include #endif #endif #ifdef _KERNEL #include #define MBUF_PROBE1(probe, arg0) \ SDT_PROBE1(sdt, , , probe, arg0) #define MBUF_PROBE2(probe, arg0, arg1) \ SDT_PROBE2(sdt, , , probe, arg0, arg1) #define MBUF_PROBE3(probe, arg0, arg1, arg2) \ SDT_PROBE3(sdt, , , probe, arg0, arg1, arg2) #define MBUF_PROBE4(probe, arg0, arg1, arg2, arg3) \ SDT_PROBE4(sdt, , , probe, arg0, arg1, arg2, arg3) #define MBUF_PROBE5(probe, arg0, arg1, arg2, arg3, arg4) \ SDT_PROBE5(sdt, , , probe, arg0, arg1, arg2, arg3, arg4) SDT_PROBE_DECLARE(sdt, , , m__init); SDT_PROBE_DECLARE(sdt, , , m__gethdr); SDT_PROBE_DECLARE(sdt, , , m__get); SDT_PROBE_DECLARE(sdt, , , m__getcl); SDT_PROBE_DECLARE(sdt, , , m__clget); SDT_PROBE_DECLARE(sdt, , , m__cljget); SDT_PROBE_DECLARE(sdt, , , m__cljset); SDT_PROBE_DECLARE(sdt, , , m__free); SDT_PROBE_DECLARE(sdt, , , m__freem); #endif /* _KERNEL */ /* * Mbufs are of a single size, MSIZE (sys/param.h), which includes overhead. * An mbuf may add a single "mbuf cluster" of size MCLBYTES (also in * sys/param.h), which has no additional overhead and is used instead of the * internal data area; this is done when at least MINCLSIZE of data must be * stored. Additionally, it is possible to allocate a separate buffer * externally and attach it to the mbuf in a way similar to that of mbuf * clusters. * * NB: These calculation do not take actual compiler-induced alignment and * padding inside the complete struct mbuf into account. Appropriate * attention is required when changing members of struct mbuf. * * MLEN is data length in a normal mbuf. * MHLEN is data length in an mbuf with pktheader. * MINCLSIZE is a smallest amount of data that should be put into cluster. * * Compile-time assertions in uipc_mbuf.c test these values to ensure that * they are sensible. */ struct mbuf; #define MHSIZE offsetof(struct mbuf, m_dat) #define MPKTHSIZE offsetof(struct mbuf, m_pktdat) #define MLEN ((int)(MSIZE - MHSIZE)) #define MHLEN ((int)(MSIZE - MPKTHSIZE)) #define MINCLSIZE (MHLEN + 1) #define M_NODOM 255 #ifdef _KERNEL /*- * Macro for type conversion: convert mbuf pointer to data pointer of correct * type: * * mtod(m, t) -- Convert mbuf pointer to data pointer of correct type. * mtodo(m, o) -- Same as above but with offset 'o' into data. */ #define mtod(m, t) ((t)((m)->m_data)) #define mtodo(m, o) ((void *)(((m)->m_data) + (o))) /* * Argument structure passed to UMA routines during mbuf and packet * allocations. */ struct mb_args { int flags; /* Flags for mbuf being allocated */ short type; /* Type of mbuf being allocated */ }; #endif /* _KERNEL */ /* * Packet tag structure (see below for details). */ struct m_tag { SLIST_ENTRY(m_tag) m_tag_link; /* List of packet tags */ u_int16_t m_tag_id; /* Tag ID */ u_int16_t m_tag_len; /* Length of data */ u_int32_t m_tag_cookie; /* ABI/Module ID */ void (*m_tag_free)(struct m_tag *); }; /* * Static network interface owned tag. * Allocated through ifp->if_snd_tag_alloc(). */ struct m_snd_tag { struct ifnet *ifp; /* network interface tag belongs to */ volatile u_int refcount; }; /* * Record/packet header in first mbuf of chain; valid only if M_PKTHDR is set. * Size ILP32: 48 * LP64: 56 * Compile-time assertions in uipc_mbuf.c test these values to ensure that * they are correct. */ struct pkthdr { union { struct m_snd_tag *snd_tag; /* send tag, if any */ struct ifnet *rcvif; /* rcv interface */ }; SLIST_HEAD(packet_tags, m_tag) tags; /* list of packet tags */ int32_t len; /* total packet length */ /* Layer crossing persistent information. */ uint32_t flowid; /* packet's 4-tuple system */ uint32_t csum_flags; /* checksum and offload features */ uint16_t fibnum; /* this packet should use this fib */ uint8_t numa_domain; /* NUMA domain of recvd pkt */ uint8_t rsstype; /* hash type */ union { uint64_t rcv_tstmp; /* timestamp in ns */ struct { uint8_t l2hlen; /* layer 2 hdr len */ uint8_t l3hlen; /* layer 3 hdr len */ uint8_t l4hlen; /* layer 4 hdr len */ uint8_t l5hlen; /* layer 5 hdr len */ uint32_t spare; }; }; union { uint8_t eight[8]; uint16_t sixteen[4]; uint32_t thirtytwo[2]; uint64_t sixtyfour[1]; uintptr_t unintptr[1]; void *ptr; } PH_per; /* Layer specific non-persistent local storage for reassembly, etc. */ union { uint8_t eight[8]; uint16_t sixteen[4]; uint32_t thirtytwo[2]; uint64_t sixtyfour[1]; uintptr_t unintptr[1]; void *ptr; } PH_loc; }; #define ether_vtag PH_per.sixteen[0] #define PH_vt PH_per #define vt_nrecs sixteen[0] #define tso_segsz PH_per.sixteen[1] #define lro_nsegs tso_segsz #define csum_phsum PH_per.sixteen[2] #define csum_data PH_per.thirtytwo[1] #define lro_len PH_per.sixteen[0] /* inbound during LRO */ #define lro_csum PH_per.sixteen[1] /* inbound during LRO */ #define pace_thoff PH_loc.sixteen[0] #define pace_tlen PH_loc.sixteen[1] #define pace_drphdrlen PH_loc.sixteen[2] #define pace_tos PH_loc.eight[6] #define pace_lock PH_loc.eight[7] /* * Description of external storage mapped into mbuf; valid only if M_EXT is * set. * Size ILP32: 28 * LP64: 48 * Compile-time assertions in uipc_mbuf.c test these values to ensure that * they are correct. */ typedef void m_ext_free_t(struct mbuf *); struct m_ext { union { /* * If EXT_FLAG_EMBREF is set, then we use refcount in the * mbuf, the 'ext_count' member. Otherwise, we have a * shadow copy and we use pointer 'ext_cnt'. The original * mbuf is responsible to carry the pointer to free routine * and its arguments. They aren't copied into shadows in * mb_dupcl() to avoid dereferencing next cachelines. */ volatile u_int ext_count; volatile u_int *ext_cnt; }; union { /* * If ext_type == EXT_PGS, 'ext_pgs' points to a * structure describing the buffer. Otherwise, * 'ext_buf' points to the start of the buffer. */ struct mbuf_ext_pgs *ext_pgs; char *ext_buf; }; uint32_t ext_size; /* size of buffer, for ext_free */ uint32_t ext_type:8, /* type of external storage */ ext_flags:24; /* external storage mbuf flags */ /* * Fields below store the free context for the external storage. * They are valid only in the refcount carrying mbuf, the one with * EXT_FLAG_EMBREF flag, with exclusion for EXT_EXTREF type, where * the free context is copied into all mbufs that use same external * storage. */ #define m_ext_copylen offsetof(struct m_ext, ext_free) m_ext_free_t *ext_free; /* free routine if not the usual */ void *ext_arg1; /* optional argument pointer */ void *ext_arg2; /* optional argument pointer */ }; /* * The core of the mbuf object along with some shortcut defines for practical * purposes. */ struct mbuf { /* * Header present at the beginning of every mbuf. * Size ILP32: 24 * LP64: 32 * Compile-time assertions in uipc_mbuf.c test these values to ensure * that they are correct. */ union { /* next buffer in chain */ struct mbuf *m_next; SLIST_ENTRY(mbuf) m_slist; STAILQ_ENTRY(mbuf) m_stailq; }; union { /* next chain in queue/record */ struct mbuf *m_nextpkt; SLIST_ENTRY(mbuf) m_slistpkt; STAILQ_ENTRY(mbuf) m_stailqpkt; }; caddr_t m_data; /* location of data */ int32_t m_len; /* amount of data in this mbuf */ uint32_t m_type:8, /* type of data in this mbuf */ m_flags:24; /* flags; see below */ #if !defined(__LP64__) uint32_t m_pad; /* pad for 64bit alignment */ #endif /* * A set of optional headers (packet header, external storage header) * and internal data storage. Historically, these arrays were sized * to MHLEN (space left after a packet header) and MLEN (space left * after only a regular mbuf header); they are now variable size in * order to support future work on variable-size mbufs. */ union { struct { struct pkthdr m_pkthdr; /* M_PKTHDR set */ union { struct m_ext m_ext; /* M_EXT set */ char m_pktdat[0]; }; }; char m_dat[0]; /* !M_PKTHDR, !M_EXT */ }; }; struct ktls_session; struct socket; /* * TLS records for TLS 1.0-1.2 can have the following header lengths: * - 5 (AES-CBC with implicit IV) * - 21 (AES-CBC with explicit IV) * - 13 (AES-GCM with 8 byte explicit IV) */ #define MBUF_PEXT_HDR_LEN 24 /* * TLS records for TLS 1.0-1.2 can have the following maximum trailer * lengths: * - 16 (AES-GCM) * - 36 (AES-CBC with SHA1 and up to 16 bytes of padding) * - 48 (AES-CBC with SHA2-256 and up to 16 bytes of padding) * - 64 (AES-CBC with SHA2-384 and up to 16 bytes of padding) */ #define MBUF_PEXT_TRAIL_LEN 64 #ifdef __LP64__ #define MBUF_PEXT_MAX_PGS (152 / sizeof(vm_paddr_t)) #else #define MBUF_PEXT_MAX_PGS (156 / sizeof(vm_paddr_t)) #endif #define MBUF_PEXT_MAX_BYTES \ (MBUF_PEXT_MAX_PGS * PAGE_SIZE + MBUF_PEXT_HDR_LEN + MBUF_PEXT_TRAIL_LEN) /* * This struct is 256 bytes in size and is arranged so that the most * common case (accessing the first 4 pages of a 16KB TLS record) will * fit in a single 64 byte cacheline. */ struct mbuf_ext_pgs { uint8_t npgs; /* Number of attached pages */ uint8_t nrdy; /* Pages with I/O pending */ uint8_t hdr_len; /* TLS header length */ uint8_t trail_len; /* TLS trailer length */ uint16_t first_pg_off; /* Offset into 1st page */ uint16_t last_pg_len; /* Length of last page */ vm_paddr_t pa[MBUF_PEXT_MAX_PGS]; /* phys addrs of pages */ char hdr[MBUF_PEXT_HDR_LEN]; /* TLS header */ struct ktls_session *tls; /* TLS session */ #if defined(__i386__) || \ (defined(__powerpc__) && !defined(__powerpc64__) && defined(BOOKE)) /* * i386 and Book-E PowerPC have 64-bit vm_paddr_t, so there is * a 4 byte remainder from the space allocated for pa[]. */ uint32_t pad; #endif union { char trail[MBUF_PEXT_TRAIL_LEN]; /* TLS trailer */ struct { struct socket *so; struct mbuf *mbuf; uint64_t seqno; STAILQ_ENTRY(mbuf_ext_pgs) stailq; int enc_cnt; }; }; }; #ifdef _KERNEL static inline int mbuf_ext_pg_len(struct mbuf_ext_pgs *ext_pgs, int pidx, int pgoff) { KASSERT(pgoff == 0 || pidx == 0, ("page %d with non-zero offset %d in %p", pidx, pgoff, ext_pgs)); if (pidx == ext_pgs->npgs - 1) { return (ext_pgs->last_pg_len); } else { return (PAGE_SIZE - pgoff); } } #ifdef INVARIANT_SUPPORT void mb_ext_pgs_check(struct mbuf_ext_pgs *ext_pgs); #endif #ifdef INVARIANTS #define MBUF_EXT_PGS_ASSERT_SANITY(ext_pgs) mb_ext_pgs_check((ext_pgs)) #else #define MBUF_EXT_PGS_ASSERT_SANITY(ext_pgs) #endif #endif /* * mbuf flags of global significance and layer crossing. * Those of only protocol/layer specific significance are to be mapped * to M_PROTO[1-11] and cleared at layer handoff boundaries. * NB: Limited to the lower 24 bits. */ #define M_EXT 0x00000001 /* has associated external storage */ #define M_PKTHDR 0x00000002 /* start of record */ #define M_EOR 0x00000004 /* end of record */ #define M_RDONLY 0x00000008 /* associated data is marked read-only */ #define M_BCAST 0x00000010 /* send/received as link-level broadcast */ #define M_MCAST 0x00000020 /* send/received as link-level multicast */ #define M_PROMISC 0x00000040 /* packet was not for us */ #define M_VLANTAG 0x00000080 /* ether_vtag is valid */ #define M_NOMAP 0x00000100 /* mbuf data is unmapped */ #define M_NOFREE 0x00000200 /* do not free mbuf, embedded in cluster */ #define M_TSTMP 0x00000400 /* rcv_tstmp field is valid */ #define M_TSTMP_HPREC 0x00000800 /* rcv_tstmp is high-prec, typically hw-stamped on port (useful for IEEE 1588 and 802.1AS) */ #define M_TSTMP_LRO 0x00001000 /* Time LRO pushed in pkt is valid in (PH_loc) */ #define M_PROTO1 0x00002000 /* protocol-specific */ #define M_PROTO2 0x00004000 /* protocol-specific */ #define M_PROTO3 0x00008000 /* protocol-specific */ #define M_PROTO4 0x00010000 /* protocol-specific */ #define M_PROTO5 0x00020000 /* protocol-specific */ #define M_PROTO6 0x00040000 /* protocol-specific */ #define M_PROTO7 0x00080000 /* protocol-specific */ #define M_PROTO8 0x00100000 /* protocol-specific */ #define M_PROTO9 0x00200000 /* protocol-specific */ #define M_PROTO10 0x00400000 /* protocol-specific */ #define M_PROTO11 0x00800000 /* protocol-specific */ #define MB_DTOR_SKIP 0x1 /* don't pollute the cache by touching a freed mbuf */ /* * Flags to purge when crossing layers. */ #define M_PROTOFLAGS \ (M_PROTO1|M_PROTO2|M_PROTO3|M_PROTO4|M_PROTO5|M_PROTO6|M_PROTO7|M_PROTO8|\ M_PROTO9|M_PROTO10|M_PROTO11) /* * Flags preserved when copying m_pkthdr. */ #define M_COPYFLAGS \ (M_PKTHDR|M_EOR|M_RDONLY|M_BCAST|M_MCAST|M_PROMISC|M_VLANTAG|M_TSTMP| \ - M_TSTMP_HPREC|M_PROTOFLAGS) + M_TSTMP_HPREC|M_TSTMP_LRO|M_PROTOFLAGS) /* * Mbuf flag description for use with printf(9) %b identifier. */ #define M_FLAG_BITS \ "\20\1M_EXT\2M_PKTHDR\3M_EOR\4M_RDONLY\5M_BCAST\6M_MCAST" \ - "\7M_PROMISC\10M_VLANTAG\11M_NOMAP\12M_NOFREE\13M_TSTMP\14M_TSTMP_HPREC" + "\7M_PROMISC\10M_VLANTAG\11M_NOMAP\12M_NOFREE\13M_TSTMP\14M_TSTMP_HPREC\15M_TSTMP_LRO" #define M_FLAG_PROTOBITS \ - "\15M_PROTO1\16M_PROTO2\17M_PROTO3\20M_PROTO4\21M_PROTO5" \ - "\22M_PROTO6\23M_PROTO7\24M_PROTO8\25M_PROTO9\26M_PROTO10" \ - "\27M_PROTO11" + "\16M_PROTO1\17M_PROTO2\20M_PROTO3\21M_PROTO4" \ + "\22M_PROTO5\23M_PROTO6\24M_PROTO7\25M_PROTO8\26M_PROTO9" \ + "\27M_PROTO10\28M_PROTO11" #define M_FLAG_PRINTF (M_FLAG_BITS M_FLAG_PROTOBITS) /* * Network interface cards are able to hash protocol fields (such as IPv4 * addresses and TCP port numbers) classify packets into flows. These flows * can then be used to maintain ordering while delivering packets to the OS * via parallel input queues, as well as to provide a stateless affinity * model. NIC drivers can pass up the hash via m->m_pkthdr.flowid, and set * m_flag fields to indicate how the hash should be interpreted by the * network stack. * * Most NICs support RSS, which provides ordering and explicit affinity, and * use the hash m_flag bits to indicate what header fields were covered by * the hash. M_HASHTYPE_OPAQUE and M_HASHTYPE_OPAQUE_HASH can be set by non- * RSS cards or configurations that provide an opaque flow identifier, allowing * for ordering and distribution without explicit affinity. Additionally, * M_HASHTYPE_OPAQUE_HASH indicates that the flow identifier has hash * properties. * * The meaning of the IPV6_EX suffix: * "o Home address from the home address option in the IPv6 destination * options header. If the extension header is not present, use the Source * IPv6 Address. * o IPv6 address that is contained in the Routing-Header-Type-2 from the * associated extension header. If the extension header is not present, * use the Destination IPv6 Address." * Quoted from: * https://docs.microsoft.com/en-us/windows-hardware/drivers/network/rss-hashing-types#ndishashipv6ex */ #define M_HASHTYPE_HASHPROP 0x80 /* has hash properties */ #define M_HASHTYPE_HASH(t) (M_HASHTYPE_HASHPROP | (t)) /* Microsoft RSS standard hash types */ #define M_HASHTYPE_NONE 0 #define M_HASHTYPE_RSS_IPV4 M_HASHTYPE_HASH(1) /* IPv4 2-tuple */ #define M_HASHTYPE_RSS_TCP_IPV4 M_HASHTYPE_HASH(2) /* TCPv4 4-tuple */ #define M_HASHTYPE_RSS_IPV6 M_HASHTYPE_HASH(3) /* IPv6 2-tuple */ #define M_HASHTYPE_RSS_TCP_IPV6 M_HASHTYPE_HASH(4) /* TCPv6 4-tuple */ #define M_HASHTYPE_RSS_IPV6_EX M_HASHTYPE_HASH(5) /* IPv6 2-tuple + * ext hdrs */ #define M_HASHTYPE_RSS_TCP_IPV6_EX M_HASHTYPE_HASH(6) /* TCPv6 4-tuple + * ext hdrs */ #define M_HASHTYPE_RSS_UDP_IPV4 M_HASHTYPE_HASH(7) /* IPv4 UDP 4-tuple*/ #define M_HASHTYPE_RSS_UDP_IPV6 M_HASHTYPE_HASH(9) /* IPv6 UDP 4-tuple*/ #define M_HASHTYPE_RSS_UDP_IPV6_EX M_HASHTYPE_HASH(10)/* IPv6 UDP 4-tuple + * ext hdrs */ #define M_HASHTYPE_OPAQUE 63 /* ordering, not affinity */ #define M_HASHTYPE_OPAQUE_HASH M_HASHTYPE_HASH(M_HASHTYPE_OPAQUE) /* ordering+hash, not affinity*/ #define M_HASHTYPE_CLEAR(m) ((m)->m_pkthdr.rsstype = 0) #define M_HASHTYPE_GET(m) ((m)->m_pkthdr.rsstype) #define M_HASHTYPE_SET(m, v) ((m)->m_pkthdr.rsstype = (v)) #define M_HASHTYPE_TEST(m, v) (M_HASHTYPE_GET(m) == (v)) #define M_HASHTYPE_ISHASH(m) (M_HASHTYPE_GET(m) & M_HASHTYPE_HASHPROP) /* * External mbuf storage buffer types. */ #define EXT_CLUSTER 1 /* mbuf cluster */ #define EXT_SFBUF 2 /* sendfile(2)'s sf_buf */ #define EXT_JUMBOP 3 /* jumbo cluster page sized */ #define EXT_JUMBO9 4 /* jumbo cluster 9216 bytes */ #define EXT_JUMBO16 5 /* jumbo cluster 16184 bytes */ #define EXT_PACKET 6 /* mbuf+cluster from packet zone */ #define EXT_MBUF 7 /* external mbuf reference */ #define EXT_RXRING 8 /* data in NIC receive ring */ #define EXT_PGS 9 /* array of unmapped pages */ #define EXT_VENDOR1 224 /* for vendor-internal use */ #define EXT_VENDOR2 225 /* for vendor-internal use */ #define EXT_VENDOR3 226 /* for vendor-internal use */ #define EXT_VENDOR4 227 /* for vendor-internal use */ #define EXT_EXP1 244 /* for experimental use */ #define EXT_EXP2 245 /* for experimental use */ #define EXT_EXP3 246 /* for experimental use */ #define EXT_EXP4 247 /* for experimental use */ #define EXT_NET_DRV 252 /* custom ext_buf provided by net driver(s) */ #define EXT_MOD_TYPE 253 /* custom module's ext_buf type */ #define EXT_DISPOSABLE 254 /* can throw this buffer away w/page flipping */ #define EXT_EXTREF 255 /* has externally maintained ext_cnt ptr */ /* * Flags for external mbuf buffer types. * NB: limited to the lower 24 bits. */ #define EXT_FLAG_EMBREF 0x000001 /* embedded ext_count */ #define EXT_FLAG_EXTREF 0x000002 /* external ext_cnt, notyet */ #define EXT_FLAG_NOFREE 0x000010 /* don't free mbuf to pool, notyet */ #define EXT_FLAG_VENDOR1 0x010000 /* These flags are vendor */ #define EXT_FLAG_VENDOR2 0x020000 /* or submodule specific, */ #define EXT_FLAG_VENDOR3 0x040000 /* not used by mbuf code. */ #define EXT_FLAG_VENDOR4 0x080000 /* Set/read by submodule. */ #define EXT_FLAG_EXP1 0x100000 /* for experimental use */ #define EXT_FLAG_EXP2 0x200000 /* for experimental use */ #define EXT_FLAG_EXP3 0x400000 /* for experimental use */ #define EXT_FLAG_EXP4 0x800000 /* for experimental use */ /* * EXT flag description for use with printf(9) %b identifier. */ #define EXT_FLAG_BITS \ "\20\1EXT_FLAG_EMBREF\2EXT_FLAG_EXTREF\5EXT_FLAG_NOFREE" \ "\21EXT_FLAG_VENDOR1\22EXT_FLAG_VENDOR2\23EXT_FLAG_VENDOR3" \ "\24EXT_FLAG_VENDOR4\25EXT_FLAG_EXP1\26EXT_FLAG_EXP2\27EXT_FLAG_EXP3" \ "\30EXT_FLAG_EXP4" #define MBUF_EXT_PGS_ASSERT(m) \ KASSERT((((m)->m_flags & M_EXT) != 0) && \ ((m)->m_ext.ext_type == EXT_PGS), \ ("%s: m %p !M_EXT or !EXT_PGS", __func__, m)) /* * Flags indicating checksum, segmentation and other offload work to be * done, or already done, by hardware or lower layers. It is split into * separate inbound and outbound flags. * * Outbound flags that are set by upper protocol layers requesting lower * layers, or ideally the hardware, to perform these offloading tasks. * For outbound packets this field and its flags can be directly tested * against ifnet if_hwassist. */ #define CSUM_IP 0x00000001 /* IP header checksum offload */ #define CSUM_IP_UDP 0x00000002 /* UDP checksum offload */ #define CSUM_IP_TCP 0x00000004 /* TCP checksum offload */ #define CSUM_IP_SCTP 0x00000008 /* SCTP checksum offload */ #define CSUM_IP_TSO 0x00000010 /* TCP segmentation offload */ #define CSUM_IP_ISCSI 0x00000020 /* iSCSI checksum offload */ #define CSUM_IP6_UDP 0x00000200 /* UDP checksum offload */ #define CSUM_IP6_TCP 0x00000400 /* TCP checksum offload */ #define CSUM_IP6_SCTP 0x00000800 /* SCTP checksum offload */ #define CSUM_IP6_TSO 0x00001000 /* TCP segmentation offload */ #define CSUM_IP6_ISCSI 0x00002000 /* iSCSI checksum offload */ /* Inbound checksum support where the checksum was verified by hardware. */ #define CSUM_L3_CALC 0x01000000 /* calculated layer 3 csum */ #define CSUM_L3_VALID 0x02000000 /* checksum is correct */ #define CSUM_L4_CALC 0x04000000 /* calculated layer 4 csum */ #define CSUM_L4_VALID 0x08000000 /* checksum is correct */ #define CSUM_L5_CALC 0x10000000 /* calculated layer 5 csum */ #define CSUM_L5_VALID 0x20000000 /* checksum is correct */ #define CSUM_COALESCED 0x40000000 /* contains merged segments */ #define CSUM_SND_TAG 0x80000000 /* Packet header has send tag */ /* * CSUM flag description for use with printf(9) %b identifier. */ #define CSUM_BITS \ "\20\1CSUM_IP\2CSUM_IP_UDP\3CSUM_IP_TCP\4CSUM_IP_SCTP\5CSUM_IP_TSO" \ "\6CSUM_IP_ISCSI" \ "\12CSUM_IP6_UDP\13CSUM_IP6_TCP\14CSUM_IP6_SCTP\15CSUM_IP6_TSO" \ "\16CSUM_IP6_ISCSI" \ "\31CSUM_L3_CALC\32CSUM_L3_VALID\33CSUM_L4_CALC\34CSUM_L4_VALID" \ "\35CSUM_L5_CALC\36CSUM_L5_VALID\37CSUM_COALESCED\40CSUM_SND_TAG" /* CSUM flags compatibility mappings. */ #define CSUM_IP_CHECKED CSUM_L3_CALC #define CSUM_IP_VALID CSUM_L3_VALID #define CSUM_DATA_VALID CSUM_L4_VALID #define CSUM_PSEUDO_HDR CSUM_L4_CALC #define CSUM_SCTP_VALID CSUM_L4_VALID #define CSUM_DELAY_DATA (CSUM_TCP|CSUM_UDP) #define CSUM_DELAY_IP CSUM_IP /* Only v4, no v6 IP hdr csum */ #define CSUM_DELAY_DATA_IPV6 (CSUM_TCP_IPV6|CSUM_UDP_IPV6) #define CSUM_DATA_VALID_IPV6 CSUM_DATA_VALID #define CSUM_TCP CSUM_IP_TCP #define CSUM_UDP CSUM_IP_UDP #define CSUM_SCTP CSUM_IP_SCTP #define CSUM_TSO (CSUM_IP_TSO|CSUM_IP6_TSO) #define CSUM_UDP_IPV6 CSUM_IP6_UDP #define CSUM_TCP_IPV6 CSUM_IP6_TCP #define CSUM_SCTP_IPV6 CSUM_IP6_SCTP /* * mbuf types describing the content of the mbuf (including external storage). */ #define MT_NOTMBUF 0 /* USED INTERNALLY ONLY! Object is not mbuf */ #define MT_DATA 1 /* dynamic (data) allocation */ #define MT_HEADER MT_DATA /* packet header, use M_PKTHDR instead */ #define MT_VENDOR1 4 /* for vendor-internal use */ #define MT_VENDOR2 5 /* for vendor-internal use */ #define MT_VENDOR3 6 /* for vendor-internal use */ #define MT_VENDOR4 7 /* for vendor-internal use */ #define MT_SONAME 8 /* socket name */ #define MT_EXP1 9 /* for experimental use */ #define MT_EXP2 10 /* for experimental use */ #define MT_EXP3 11 /* for experimental use */ #define MT_EXP4 12 /* for experimental use */ #define MT_CONTROL 14 /* extra-data protocol message */ #define MT_EXTCONTROL 15 /* control message with externalized contents */ #define MT_OOBDATA 16 /* expedited data */ #define MT_NOINIT 255 /* Not a type but a flag to allocate a non-initialized mbuf */ /* * String names of mbuf-related UMA(9) and malloc(9) types. Exposed to * !_KERNEL so that monitoring tools can look up the zones with * libmemstat(3). */ #define MBUF_MEM_NAME "mbuf" #define MBUF_CLUSTER_MEM_NAME "mbuf_cluster" #define MBUF_PACKET_MEM_NAME "mbuf_packet" #define MBUF_JUMBOP_MEM_NAME "mbuf_jumbo_page" #define MBUF_JUMBO9_MEM_NAME "mbuf_jumbo_9k" #define MBUF_JUMBO16_MEM_NAME "mbuf_jumbo_16k" #define MBUF_TAG_MEM_NAME "mbuf_tag" #define MBUF_EXTREFCNT_MEM_NAME "mbuf_ext_refcnt" #define MBUF_EXTPGS_MEM_NAME "mbuf_extpgs" #ifdef _KERNEL #ifdef WITNESS #define MBUF_CHECKSLEEP(how) do { \ if (how == M_WAITOK) \ WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, \ "Sleeping in \"%s\"", __func__); \ } while (0) #else #define MBUF_CHECKSLEEP(how) #endif /* * Network buffer allocation API * * The rest of it is defined in kern/kern_mbuf.c */ extern uma_zone_t zone_mbuf; extern uma_zone_t zone_clust; extern uma_zone_t zone_pack; extern uma_zone_t zone_jumbop; extern uma_zone_t zone_jumbo9; extern uma_zone_t zone_jumbo16; extern uma_zone_t zone_extpgs; void mb_dupcl(struct mbuf *, struct mbuf *); void mb_free_ext(struct mbuf *); void mb_free_mext_pgs(struct mbuf *); struct mbuf *mb_alloc_ext_pgs(int, bool, m_ext_free_t); int mb_unmapped_compress(struct mbuf *m); struct mbuf *mb_unmapped_to_ext(struct mbuf *m); void mb_free_notready(struct mbuf *m, int count); void m_adj(struct mbuf *, int); int m_apply(struct mbuf *, int, int, int (*)(void *, void *, u_int), void *); int m_append(struct mbuf *, int, c_caddr_t); void m_cat(struct mbuf *, struct mbuf *); void m_catpkt(struct mbuf *, struct mbuf *); int m_clget(struct mbuf *m, int how); void *m_cljget(struct mbuf *m, int how, int size); struct mbuf *m_collapse(struct mbuf *, int, int); void m_copyback(struct mbuf *, int, int, c_caddr_t); void m_copydata(const struct mbuf *, int, int, caddr_t); struct mbuf *m_copym(struct mbuf *, int, int, int); struct mbuf *m_copypacket(struct mbuf *, int); void m_copy_pkthdr(struct mbuf *, struct mbuf *); struct mbuf *m_copyup(struct mbuf *, int, int); struct mbuf *m_defrag(struct mbuf *, int); void m_demote_pkthdr(struct mbuf *); void m_demote(struct mbuf *, int, int); struct mbuf *m_devget(char *, int, int, struct ifnet *, void (*)(char *, caddr_t, u_int)); void m_dispose_extcontrolm(struct mbuf *m); struct mbuf *m_dup(const struct mbuf *, int); int m_dup_pkthdr(struct mbuf *, const struct mbuf *, int); void m_extadd(struct mbuf *, char *, u_int, m_ext_free_t, void *, void *, int, int); u_int m_fixhdr(struct mbuf *); struct mbuf *m_fragment(struct mbuf *, int, int); void m_freem(struct mbuf *); struct mbuf *m_get2(int, int, short, int); struct mbuf *m_getjcl(int, short, int, int); struct mbuf *m_getm2(struct mbuf *, int, int, short, int); struct mbuf *m_getptr(struct mbuf *, int, int *); u_int m_length(struct mbuf *, struct mbuf **); int m_mbuftouio(struct uio *, const struct mbuf *, int); int m_unmappedtouio(const struct mbuf *, int, struct uio *, int); void m_move_pkthdr(struct mbuf *, struct mbuf *); int m_pkthdr_init(struct mbuf *, int); struct mbuf *m_prepend(struct mbuf *, int, int); void m_print(const struct mbuf *, int); struct mbuf *m_pulldown(struct mbuf *, int, int, int *); struct mbuf *m_pullup(struct mbuf *, int); int m_sanity(struct mbuf *, int); struct mbuf *m_split(struct mbuf *, int, int); struct mbuf *m_uiotombuf(struct uio *, int, int, int, int); struct mbuf *m_unshare(struct mbuf *, int); void m_snd_tag_init(struct m_snd_tag *, struct ifnet *); void m_snd_tag_destroy(struct m_snd_tag *); static __inline int m_gettype(int size) { int type; switch (size) { case MSIZE: type = EXT_MBUF; break; case MCLBYTES: type = EXT_CLUSTER; break; #if MJUMPAGESIZE != MCLBYTES case MJUMPAGESIZE: type = EXT_JUMBOP; break; #endif case MJUM9BYTES: type = EXT_JUMBO9; break; case MJUM16BYTES: type = EXT_JUMBO16; break; default: panic("%s: invalid cluster size %d", __func__, size); } return (type); } /* * Associated an external reference counted buffer with an mbuf. */ static __inline void m_extaddref(struct mbuf *m, char *buf, u_int size, u_int *ref_cnt, m_ext_free_t freef, void *arg1, void *arg2) { KASSERT(ref_cnt != NULL, ("%s: ref_cnt not provided", __func__)); atomic_add_int(ref_cnt, 1); m->m_flags |= M_EXT; m->m_ext.ext_buf = buf; m->m_ext.ext_cnt = ref_cnt; m->m_data = m->m_ext.ext_buf; m->m_ext.ext_size = size; m->m_ext.ext_free = freef; m->m_ext.ext_arg1 = arg1; m->m_ext.ext_arg2 = arg2; m->m_ext.ext_type = EXT_EXTREF; m->m_ext.ext_flags = 0; } static __inline uma_zone_t m_getzone(int size) { uma_zone_t zone; switch (size) { case MCLBYTES: zone = zone_clust; break; #if MJUMPAGESIZE != MCLBYTES case MJUMPAGESIZE: zone = zone_jumbop; break; #endif case MJUM9BYTES: zone = zone_jumbo9; break; case MJUM16BYTES: zone = zone_jumbo16; break; default: panic("%s: invalid cluster size %d", __func__, size); } return (zone); } /* * Initialize an mbuf with linear storage. * * Inline because the consumer text overhead will be roughly the same to * initialize or call a function with this many parameters and M_PKTHDR * should go away with constant propagation for !MGETHDR. */ static __inline int m_init(struct mbuf *m, int how, short type, int flags) { int error; m->m_next = NULL; m->m_nextpkt = NULL; m->m_data = m->m_dat; m->m_len = 0; m->m_flags = flags; m->m_type = type; if (flags & M_PKTHDR) error = m_pkthdr_init(m, how); else error = 0; MBUF_PROBE5(m__init, m, how, type, flags, error); return (error); } static __inline struct mbuf * m_get(int how, short type) { struct mbuf *m; struct mb_args args; args.flags = 0; args.type = type; m = uma_zalloc_arg(zone_mbuf, &args, how); MBUF_PROBE3(m__get, how, type, m); return (m); } static __inline struct mbuf * m_gethdr(int how, short type) { struct mbuf *m; struct mb_args args; args.flags = M_PKTHDR; args.type = type; m = uma_zalloc_arg(zone_mbuf, &args, how); MBUF_PROBE3(m__gethdr, how, type, m); return (m); } static __inline struct mbuf * m_getcl(int how, short type, int flags) { struct mbuf *m; struct mb_args args; args.flags = flags; args.type = type; m = uma_zalloc_arg(zone_pack, &args, how); MBUF_PROBE4(m__getcl, how, type, flags, m); return (m); } /* * XXX: m_cljset() is a dangerous API. One must attach only a new, * unreferenced cluster to an mbuf(9). It is not possible to assert * that, so care can be taken only by users of the API. */ static __inline void m_cljset(struct mbuf *m, void *cl, int type) { int size; switch (type) { case EXT_CLUSTER: size = MCLBYTES; break; #if MJUMPAGESIZE != MCLBYTES case EXT_JUMBOP: size = MJUMPAGESIZE; break; #endif case EXT_JUMBO9: size = MJUM9BYTES; break; case EXT_JUMBO16: size = MJUM16BYTES; break; default: panic("%s: unknown cluster type %d", __func__, type); break; } m->m_data = m->m_ext.ext_buf = cl; m->m_ext.ext_free = m->m_ext.ext_arg1 = m->m_ext.ext_arg2 = NULL; m->m_ext.ext_size = size; m->m_ext.ext_type = type; m->m_ext.ext_flags = EXT_FLAG_EMBREF; m->m_ext.ext_count = 1; m->m_flags |= M_EXT; MBUF_PROBE3(m__cljset, m, cl, type); } static __inline void m_chtype(struct mbuf *m, short new_type) { m->m_type = new_type; } static __inline void m_clrprotoflags(struct mbuf *m) { while (m) { m->m_flags &= ~M_PROTOFLAGS; m = m->m_next; } } static __inline struct mbuf * m_last(struct mbuf *m) { while (m->m_next) m = m->m_next; return (m); } static inline u_int m_extrefcnt(struct mbuf *m) { KASSERT(m->m_flags & M_EXT, ("%s: M_EXT missing", __func__)); return ((m->m_ext.ext_flags & EXT_FLAG_EMBREF) ? m->m_ext.ext_count : *m->m_ext.ext_cnt); } /* * mbuf, cluster, and external object allocation macros (for compatibility * purposes). */ #define M_MOVE_PKTHDR(to, from) m_move_pkthdr((to), (from)) #define MGET(m, how, type) ((m) = m_get((how), (type))) #define MGETHDR(m, how, type) ((m) = m_gethdr((how), (type))) #define MCLGET(m, how) m_clget((m), (how)) #define MEXTADD(m, buf, size, free, arg1, arg2, flags, type) \ m_extadd((m), (char *)(buf), (size), (free), (arg1), (arg2), \ (flags), (type)) #define m_getm(m, len, how, type) \ m_getm2((m), (len), (how), (type), M_PKTHDR) /* * Evaluate TRUE if it's safe to write to the mbuf m's data region (this can * be both the local data payload, or an external buffer area, depending on * whether M_EXT is set). */ #define M_WRITABLE(m) (((m)->m_flags & (M_RDONLY | M_NOMAP)) == 0 && \ (!(((m)->m_flags & M_EXT)) || \ (m_extrefcnt(m) == 1))) /* Check if the supplied mbuf has a packet header, or else panic. */ #define M_ASSERTPKTHDR(m) \ KASSERT((m) != NULL && (m)->m_flags & M_PKTHDR, \ ("%s: no mbuf packet header!", __func__)) /* * Ensure that the supplied mbuf is a valid, non-free mbuf. * * XXX: Broken at the moment. Need some UMA magic to make it work again. */ #define M_ASSERTVALID(m) \ KASSERT((((struct mbuf *)m)->m_flags & 0) == 0, \ ("%s: attempted use of a free mbuf!", __func__)) /* * Return the address of the start of the buffer associated with an mbuf, * handling external storage, packet-header mbufs, and regular data mbufs. */ #define M_START(m) \ (((m)->m_flags & M_NOMAP) ? NULL : \ ((m)->m_flags & M_EXT) ? (m)->m_ext.ext_buf : \ ((m)->m_flags & M_PKTHDR) ? &(m)->m_pktdat[0] : \ &(m)->m_dat[0]) /* * Return the size of the buffer associated with an mbuf, handling external * storage, packet-header mbufs, and regular data mbufs. */ #define M_SIZE(m) \ (((m)->m_flags & M_EXT) ? (m)->m_ext.ext_size : \ ((m)->m_flags & M_PKTHDR) ? MHLEN : \ MLEN) /* * Set the m_data pointer of a newly allocated mbuf to place an object of the * specified size at the end of the mbuf, longword aligned. * * NB: Historically, we had M_ALIGN(), MH_ALIGN(), and MEXT_ALIGN() as * separate macros, each asserting that it was called at the proper moment. * This required callers to themselves test the storage type and call the * right one. Rather than require callers to be aware of those layout * decisions, we centralize here. */ static __inline void m_align(struct mbuf *m, int len) { #ifdef INVARIANTS const char *msg = "%s: not a virgin mbuf"; #endif int adjust; KASSERT(m->m_data == M_START(m), (msg, __func__)); adjust = M_SIZE(m) - len; m->m_data += adjust &~ (sizeof(long)-1); } #define M_ALIGN(m, len) m_align(m, len) #define MH_ALIGN(m, len) m_align(m, len) #define MEXT_ALIGN(m, len) m_align(m, len) /* * Compute the amount of space available before the current start of data in * an mbuf. * * The M_WRITABLE() is a temporary, conservative safety measure: the burden * of checking writability of the mbuf data area rests solely with the caller. * * NB: In previous versions, M_LEADINGSPACE() would only check M_WRITABLE() * for mbufs with external storage. We now allow mbuf-embedded data to be * read-only as well. */ #define M_LEADINGSPACE(m) \ (M_WRITABLE(m) ? ((m)->m_data - M_START(m)) : 0) /* * Compute the amount of space available after the end of data in an mbuf. * * The M_WRITABLE() is a temporary, conservative safety measure: the burden * of checking writability of the mbuf data area rests solely with the caller. * * NB: In previous versions, M_TRAILINGSPACE() would only check M_WRITABLE() * for mbufs with external storage. We now allow mbuf-embedded data to be * read-only as well. */ #define M_TRAILINGSPACE(m) \ (M_WRITABLE(m) ? \ ((M_START(m) + M_SIZE(m)) - ((m)->m_data + (m)->m_len)) : 0) /* * Arrange to prepend space of size plen to mbuf m. If a new mbuf must be * allocated, how specifies whether to wait. If the allocation fails, the * original mbuf chain is freed and m is set to NULL. */ #define M_PREPEND(m, plen, how) do { \ struct mbuf **_mmp = &(m); \ struct mbuf *_mm = *_mmp; \ int _mplen = (plen); \ int __mhow = (how); \ \ MBUF_CHECKSLEEP(how); \ if (M_LEADINGSPACE(_mm) >= _mplen) { \ _mm->m_data -= _mplen; \ _mm->m_len += _mplen; \ } else \ _mm = m_prepend(_mm, _mplen, __mhow); \ if (_mm != NULL && _mm->m_flags & M_PKTHDR) \ _mm->m_pkthdr.len += _mplen; \ *_mmp = _mm; \ } while (0) /* * Change mbuf to new type. This is a relatively expensive operation and * should be avoided. */ #define MCHTYPE(m, t) m_chtype((m), (t)) /* Return the rcvif of a packet header. */ static __inline struct ifnet * m_rcvif(struct mbuf *m) { M_ASSERTPKTHDR(m); if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) return (NULL); return (m->m_pkthdr.rcvif); } /* Length to m_copy to copy all. */ #define M_COPYALL 1000000000 extern int max_datalen; /* MHLEN - max_hdr */ extern int max_hdr; /* Largest link + protocol header */ extern int max_linkhdr; /* Largest link-level header */ extern int max_protohdr; /* Largest protocol header */ extern int nmbclusters; /* Maximum number of clusters */ extern bool mb_use_ext_pgs; /* Use ext_pgs for sendfile */ /*- * Network packets may have annotations attached by affixing a list of * "packet tags" to the pkthdr structure. Packet tags are dynamically * allocated semi-opaque data structures that have a fixed header * (struct m_tag) that specifies the size of the memory block and a * pair that identifies it. The cookie is a 32-bit unique * unsigned value used to identify a module or ABI. By convention this value * is chosen as the date+time that the module is created, expressed as the * number of seconds since the epoch (e.g., using date -u +'%s'). The type * value is an ABI/module-specific value that identifies a particular * annotation and is private to the module. For compatibility with systems * like OpenBSD that define packet tags w/o an ABI/module cookie, the value * PACKET_ABI_COMPAT is used to implement m_tag_get and m_tag_find * compatibility shim functions and several tag types are defined below. * Users that do not require compatibility should use a private cookie value * so that packet tag-related definitions can be maintained privately. * * Note that the packet tag returned by m_tag_alloc has the default memory * alignment implemented by malloc. To reference private data one can use a * construct like: * * struct m_tag *mtag = m_tag_alloc(...); * struct foo *p = (struct foo *)(mtag+1); * * if the alignment of struct m_tag is sufficient for referencing members of * struct foo. Otherwise it is necessary to embed struct m_tag within the * private data structure to insure proper alignment; e.g., * * struct foo { * struct m_tag tag; * ... * }; * struct foo *p = (struct foo *) m_tag_alloc(...); * struct m_tag *mtag = &p->tag; */ /* * Persistent tags stay with an mbuf until the mbuf is reclaimed. Otherwise * tags are expected to ``vanish'' when they pass through a network * interface. For most interfaces this happens normally as the tags are * reclaimed when the mbuf is free'd. However in some special cases * reclaiming must be done manually. An example is packets that pass through * the loopback interface. Also, one must be careful to do this when * ``turning around'' packets (e.g., icmp_reflect). * * To mark a tag persistent bit-or this flag in when defining the tag id. * The tag will then be treated as described above. */ #define MTAG_PERSISTENT 0x800 #define PACKET_TAG_NONE 0 /* Nadda */ /* Packet tags for use with PACKET_ABI_COMPAT. */ #define PACKET_TAG_IPSEC_IN_DONE 1 /* IPsec applied, in */ #define PACKET_TAG_IPSEC_OUT_DONE 2 /* IPsec applied, out */ #define PACKET_TAG_IPSEC_IN_CRYPTO_DONE 3 /* NIC IPsec crypto done */ #define PACKET_TAG_IPSEC_OUT_CRYPTO_NEEDED 4 /* NIC IPsec crypto req'ed */ #define PACKET_TAG_IPSEC_IN_COULD_DO_CRYPTO 5 /* NIC notifies IPsec */ #define PACKET_TAG_IPSEC_PENDING_TDB 6 /* Reminder to do IPsec */ #define PACKET_TAG_BRIDGE 7 /* Bridge processing done */ #define PACKET_TAG_GIF 8 /* GIF processing done */ #define PACKET_TAG_GRE 9 /* GRE processing done */ #define PACKET_TAG_IN_PACKET_CHECKSUM 10 /* NIC checksumming done */ #define PACKET_TAG_ENCAP 11 /* Encap. processing */ #define PACKET_TAG_IPSEC_SOCKET 12 /* IPSEC socket ref */ #define PACKET_TAG_IPSEC_HISTORY 13 /* IPSEC history */ #define PACKET_TAG_IPV6_INPUT 14 /* IPV6 input processing */ #define PACKET_TAG_DUMMYNET 15 /* dummynet info */ #define PACKET_TAG_DIVERT 17 /* divert info */ #define PACKET_TAG_IPFORWARD 18 /* ipforward info */ #define PACKET_TAG_MACLABEL (19 | MTAG_PERSISTENT) /* MAC label */ #define PACKET_TAG_PF (21 | MTAG_PERSISTENT) /* PF/ALTQ information */ #define PACKET_TAG_RTSOCKFAM 25 /* rtsock sa family */ #define PACKET_TAG_IPOPTIONS 27 /* Saved IP options */ #define PACKET_TAG_CARP 28 /* CARP info */ #define PACKET_TAG_IPSEC_NAT_T_PORTS 29 /* two uint16_t */ #define PACKET_TAG_ND_OUTGOING 30 /* ND outgoing */ /* Specific cookies and tags. */ /* Packet tag routines. */ struct m_tag *m_tag_alloc(u_int32_t, int, int, int); void m_tag_delete(struct mbuf *, struct m_tag *); void m_tag_delete_chain(struct mbuf *, struct m_tag *); void m_tag_free_default(struct m_tag *); struct m_tag *m_tag_locate(struct mbuf *, u_int32_t, int, struct m_tag *); struct m_tag *m_tag_copy(struct m_tag *, int); int m_tag_copy_chain(struct mbuf *, const struct mbuf *, int); void m_tag_delete_nonpersistent(struct mbuf *); /* * Initialize the list of tags associated with an mbuf. */ static __inline void m_tag_init(struct mbuf *m) { SLIST_INIT(&m->m_pkthdr.tags); } /* * Set up the contents of a tag. Note that this does not fill in the free * method; the caller is expected to do that. * * XXX probably should be called m_tag_init, but that was already taken. */ static __inline void m_tag_setup(struct m_tag *t, u_int32_t cookie, int type, int len) { t->m_tag_id = type; t->m_tag_len = len; t->m_tag_cookie = cookie; } /* * Reclaim resources associated with a tag. */ static __inline void m_tag_free(struct m_tag *t) { (*t->m_tag_free)(t); } /* * Return the first tag associated with an mbuf. */ static __inline struct m_tag * m_tag_first(struct mbuf *m) { return (SLIST_FIRST(&m->m_pkthdr.tags)); } /* * Return the next tag in the list of tags associated with an mbuf. */ static __inline struct m_tag * m_tag_next(struct mbuf *m __unused, struct m_tag *t) { return (SLIST_NEXT(t, m_tag_link)); } /* * Prepend a tag to the list of tags associated with an mbuf. */ static __inline void m_tag_prepend(struct mbuf *m, struct m_tag *t) { SLIST_INSERT_HEAD(&m->m_pkthdr.tags, t, m_tag_link); } /* * Unlink a tag from the list of tags associated with an mbuf. */ static __inline void m_tag_unlink(struct mbuf *m, struct m_tag *t) { SLIST_REMOVE(&m->m_pkthdr.tags, t, m_tag, m_tag_link); } /* These are for OpenBSD compatibility. */ #define MTAG_ABI_COMPAT 0 /* compatibility ABI */ static __inline struct m_tag * m_tag_get(int type, int length, int wait) { return (m_tag_alloc(MTAG_ABI_COMPAT, type, length, wait)); } static __inline struct m_tag * m_tag_find(struct mbuf *m, int type, struct m_tag *start) { return (SLIST_EMPTY(&m->m_pkthdr.tags) ? (struct m_tag *)NULL : m_tag_locate(m, MTAG_ABI_COMPAT, type, start)); } static inline struct m_snd_tag * m_snd_tag_ref(struct m_snd_tag *mst) { refcount_acquire(&mst->refcount); return (mst); } static inline void m_snd_tag_rele(struct m_snd_tag *mst) { if (refcount_release(&mst->refcount)) m_snd_tag_destroy(mst); } static __inline struct mbuf * m_free(struct mbuf *m) { struct mbuf *n = m->m_next; MBUF_PROBE1(m__free, m); if ((m->m_flags & (M_PKTHDR|M_NOFREE)) == (M_PKTHDR|M_NOFREE)) m_tag_delete_chain(m, NULL); if (m->m_flags & M_PKTHDR && m->m_pkthdr.csum_flags & CSUM_SND_TAG) m_snd_tag_rele(m->m_pkthdr.snd_tag); if (m->m_flags & M_EXT) mb_free_ext(m); else if ((m->m_flags & M_NOFREE) == 0) uma_zfree(zone_mbuf, m); return (n); } static __inline int rt_m_getfib(struct mbuf *m) { KASSERT(m->m_flags & M_PKTHDR , ("Attempt to get FIB from non header mbuf.")); return (m->m_pkthdr.fibnum); } #define M_GETFIB(_m) rt_m_getfib(_m) #define M_SETFIB(_m, _fib) do { \ KASSERT((_m)->m_flags & M_PKTHDR, ("Attempt to set FIB on non header mbuf.")); \ ((_m)->m_pkthdr.fibnum) = (_fib); \ } while (0) /* flags passed as first argument for "m_ether_tcpip_hash()" */ #define MBUF_HASHFLAG_L2 (1 << 2) #define MBUF_HASHFLAG_L3 (1 << 3) #define MBUF_HASHFLAG_L4 (1 << 4) /* mbuf hashing helper routines */ uint32_t m_ether_tcpip_hash_init(void); uint32_t m_ether_tcpip_hash(const uint32_t, const struct mbuf *, const uint32_t); #ifdef MBUF_PROFILING void m_profile(struct mbuf *m); #define M_PROFILE(m) m_profile(m) #else #define M_PROFILE(m) #endif struct mbufq { STAILQ_HEAD(, mbuf) mq_head; int mq_len; int mq_maxlen; }; static inline void mbufq_init(struct mbufq *mq, int maxlen) { STAILQ_INIT(&mq->mq_head); mq->mq_maxlen = maxlen; mq->mq_len = 0; } static inline struct mbuf * mbufq_flush(struct mbufq *mq) { struct mbuf *m; m = STAILQ_FIRST(&mq->mq_head); STAILQ_INIT(&mq->mq_head); mq->mq_len = 0; return (m); } static inline void mbufq_drain(struct mbufq *mq) { struct mbuf *m, *n; n = mbufq_flush(mq); while ((m = n) != NULL) { n = STAILQ_NEXT(m, m_stailqpkt); m_freem(m); } } static inline struct mbuf * mbufq_first(const struct mbufq *mq) { return (STAILQ_FIRST(&mq->mq_head)); } static inline struct mbuf * mbufq_last(const struct mbufq *mq) { return (STAILQ_LAST(&mq->mq_head, mbuf, m_stailqpkt)); } static inline int mbufq_full(const struct mbufq *mq) { return (mq->mq_maxlen > 0 && mq->mq_len >= mq->mq_maxlen); } static inline int mbufq_len(const struct mbufq *mq) { return (mq->mq_len); } static inline int mbufq_enqueue(struct mbufq *mq, struct mbuf *m) { if (mbufq_full(mq)) return (ENOBUFS); STAILQ_INSERT_TAIL(&mq->mq_head, m, m_stailqpkt); mq->mq_len++; return (0); } static inline struct mbuf * mbufq_dequeue(struct mbufq *mq) { struct mbuf *m; m = STAILQ_FIRST(&mq->mq_head); if (m) { STAILQ_REMOVE_HEAD(&mq->mq_head, m_stailqpkt); m->m_nextpkt = NULL; mq->mq_len--; } return (m); } static inline void mbufq_prepend(struct mbufq *mq, struct mbuf *m) { STAILQ_INSERT_HEAD(&mq->mq_head, m, m_stailqpkt); mq->mq_len++; } /* * Note: this doesn't enforce the maximum list size for dst. */ static inline void mbufq_concat(struct mbufq *mq_dst, struct mbufq *mq_src) { mq_dst->mq_len += mq_src->mq_len; STAILQ_CONCAT(&mq_dst->mq_head, &mq_src->mq_head); mq_src->mq_len = 0; } #ifdef _SYS_TIMESPEC_H_ static inline void mbuf_tstmp2timespec(struct mbuf *m, struct timespec *ts) { KASSERT((m->m_flags & M_PKTHDR) != 0, ("mbuf %p no M_PKTHDR", m)); - KASSERT((m->m_flags & M_TSTMP) != 0, ("mbuf %p no M_TSTMP", m)); + KASSERT((m->m_flags & (M_TSTMP|M_TSTMP_LRO)) != 0, ("mbuf %p no M_TSTMP or M_TSTMP_LRO", m)); ts->tv_sec = m->m_pkthdr.rcv_tstmp / 1000000000; ts->tv_nsec = m->m_pkthdr.rcv_tstmp % 1000000000; } #endif #ifdef NETDUMP /* Invoked from the netdump client code. */ void netdump_mbuf_drain(void); void netdump_mbuf_dump(void); void netdump_mbuf_reinit(int nmbuf, int nclust, int clsize); #endif static inline bool mbuf_has_tls_session(struct mbuf *m) { if (m->m_flags & M_NOMAP) { MBUF_EXT_PGS_ASSERT(m); if (m->m_ext.ext_pgs->tls != NULL) { return (true); } } return (false); } #endif /* _KERNEL */ #endif /* !_SYS_MBUF_H_ */ Index: head/sys/sys/tim_filter.h =================================================================== --- head/sys/sys/tim_filter.h (nonexistent) +++ head/sys/sys/tim_filter.h (revision 352657) @@ -0,0 +1,134 @@ +#ifndef __tim_filter_h__ +#define __tim_filter_h__ +/*- + * Copyright (c) 2016-9 Netflix, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ +/* + * Author: Randall Stewart + */ + +#include +#include +/* + * Do not change the size unless you know what you are + * doing, the current size of 5 is designed around + * the cache-line size for an amd64 processor. Other processors + * may need other sizes. + */ +#define NUM_FILTER_ENTRIES 3 + +struct filter_entry { + uint64_t value; /* Value */ + uint32_t time_up; /* Time updated */ +} __packed ; + +struct filter_entry_small { + uint32_t value; /* Value */ + uint32_t time_up; /* Time updated */ +}; + +struct time_filter { + uint32_t cur_time_limit; + struct filter_entry entries[NUM_FILTER_ENTRIES]; +#ifdef _KERNEL +} __aligned(CACHE_LINE_SIZE); +#else +}; +#endif +struct time_filter_small { + uint32_t cur_time_limit; + struct filter_entry_small entries[NUM_FILTER_ENTRIES]; +}; + +/* + * To conserve on space there is a code duplication here (this + * is where polymophism would be nice in the kernel). Everything + * is duplicated to have a filter with a value of uint32_t instead + * of a uint64_t. This saves 20 bytes and the structure size + * drops to 44 from 64. The bad part about this is you end + * up with two sets of functions. The xxx_small() access + * the uint32_t value's where the xxx() the uint64_t values. + * This forces the user to keep straight which type of structure + * they allocated and which call they need to make. crossing + * over calls will create either invalid memory references or + * very bad results :) + */ + +#define FILTER_TYPE_MIN 1 +#define FILTER_TYPE_MAX 2 + +#ifdef _KERNEL +int setup_time_filter(struct time_filter *tf, int fil_type, uint32_t time_len); +void reset_time(struct time_filter *tf, uint32_t time_len); +void forward_filter_clock(struct time_filter *tf, uint32_t ticks_forward); +void tick_filter_clock(struct time_filter *tf, uint32_t now); +uint32_t apply_filter_min(struct time_filter *tf, uint64_t value, uint32_t now); +uint32_t apply_filter_max(struct time_filter *tf, uint64_t value, uint32_t now); +void filter_reduce_by(struct time_filter *tf, uint64_t reduce_by, uint32_t now); +void filter_increase_by(struct time_filter *tf, uint64_t incr_by, uint32_t now); +static uint64_t inline +get_filter_value(struct time_filter *tf) +{ + return(tf->entries[0].value); +} + +static uint32_t inline +get_cur_timelim(struct time_filter *tf) +{ + return(tf->cur_time_limit); +} + + +int setup_time_filter_small(struct time_filter_small *tf, + int fil_type, uint32_t time_len); +void reset_time_small(struct time_filter_small *tf, uint32_t time_len); +void forward_filter_clock_small(struct time_filter_small *tf, + uint32_t ticks_forward); +void tick_filter_clock_small(struct time_filter_small *tf, uint32_t now); +uint32_t apply_filter_min_small(struct time_filter_small *tf, + uint32_t value, uint32_t now); +uint32_t apply_filter_max_small(struct time_filter_small *tf, + uint32_t value, uint32_t now); +void filter_reduce_by_small(struct time_filter_small *tf, + uint32_t reduce_by, uint32_t now); +void filter_increase_by_small(struct time_filter_small *tf, + uint32_t incr_by, uint32_t now); +static uint64_t inline +get_filter_value_small(struct time_filter_small *tf) +{ + return(tf->entries[0].value); +} + +static uint32_t inline +get_cur_timelim_small(struct time_filter_small *tf) +{ + return(tf->cur_time_limit); +} + + +#endif +#endif Property changes on: head/sys/sys/tim_filter.h ___________________________________________________________________ Added: svn:eol-style ## -0,0 +1 ## +native \ No newline at end of property Added: svn:keywords ## -0,0 +1 ## +FreeBSD=%H \ No newline at end of property Added: svn:mime-type ## -0,0 +1 ## +text/plain \ No newline at end of property