diff --git a/share/man/man9/Makefile b/share/man/man9/Makefile index 01aaed947fa1..33e162d5fae0 100644 --- a/share/man/man9/Makefile +++ b/share/man/man9/Makefile @@ -1,2379 +1,2380 @@ # $FreeBSD$ .include MAN= accept_filter.9 \ accf_data.9 \ accf_dns.9 \ accf_http.9 \ acl.9 \ alq.9 \ altq.9 \ atomic.9 \ bhnd.9 \ bhnd_erom.9 \ bios.9 \ bitset.9 \ boot.9 \ bpf.9 \ buf.9 \ buf_ring.9 \ BUF_ISLOCKED.9 \ BUF_LOCK.9 \ BUF_LOCKFREE.9 \ BUF_LOCKINIT.9 \ BUF_RECURSED.9 \ BUF_TIMELOCK.9 \ BUF_UNLOCK.9 \ bus_activate_resource.9 \ BUS_ADD_CHILD.9 \ bus_adjust_resource.9 \ bus_alloc_resource.9 \ BUS_BIND_INTR.9 \ bus_child_present.9 \ BUS_CHILD_DELETED.9 \ BUS_CHILD_DETACHED.9 \ BUS_CONFIG_INTR.9 \ bus_delayed_attach_children.9 \ BUS_DESCRIBE_INTR.9 \ bus_dma.9 \ bus_generic_attach.9 \ bus_generic_detach.9 \ bus_generic_new_pass.9 \ bus_generic_print_child.9 \ bus_generic_read_ivar.9 \ bus_generic_shutdown.9 \ BUS_GET_CPUS.9 \ bus_get_resource.9 \ bus_map_resource.9 \ BUS_NEW_PASS.9 \ BUS_PRINT_CHILD.9 \ BUS_READ_IVAR.9 \ BUS_RESCAN.9 \ bus_release_resource.9 \ bus_set_pass.9 \ bus_set_resource.9 \ BUS_SETUP_INTR.9 \ bus_space.9 \ byteorder.9 \ callout.9 \ casuword.9 \ cd.9 \ cnv.9 \ condvar.9 \ config_intrhook.9 \ contigmalloc.9 \ copy.9 \ counter.9 \ cpuset.9 \ cr_cansee.9 \ critical_enter.9 \ cr_seeothergids.9 \ cr_seeotheruids.9 \ crypto.9 \ crypto_asym.9 \ crypto_buffer.9 \ crypto_driver.9 \ crypto_request.9 \ crypto_session.9 \ CTASSERT.9 \ DB_COMMAND.9 \ DECLARE_GEOM_CLASS.9 \ DECLARE_MODULE.9 \ DEFINE_IFUNC.9 \ DELAY.9 \ devclass.9 \ devclass_find.9 \ devclass_get_device.9 \ devclass_get_devices.9 \ devclass_get_drivers.9 \ devclass_get_maxunit.9 \ devclass_get_name.9 \ devclass_get_softc.9 \ dev_clone.9 \ devfs_set_cdevpriv.9 \ device.9 \ device_add_child.9 \ DEVICE_ATTACH.9 \ device_delete_child.9 \ device_delete_children.9 \ DEVICE_DETACH.9 \ device_enable.9 \ device_find_child.9 \ device_get_children.9 \ device_get_devclass.9 \ device_get_driver.9 \ device_get_ivars.9 \ device_get_name.9 \ device_get_parent.9 \ device_get_softc.9 \ device_get_state.9 \ device_get_sysctl.9 \ device_get_unit.9 \ DEVICE_IDENTIFY.9 \ device_printf.9 \ DEVICE_PROBE.9 \ device_probe_and_attach.9 \ device_quiet.9 \ device_set_desc.9 \ device_set_driver.9 \ device_set_flags.9 \ DEVICE_SHUTDOWN.9 \ DEV_MODULE.9 \ dev_refthread.9 \ devstat.9 \ devtoname.9 \ disk.9 \ dnv.9 \ domain.9 \ domainset.9 \ dpcpu.9 \ drbr.9 \ driver.9 \ DRIVER_MODULE.9 \ efirt.9 \ epoch.9 \ EVENTHANDLER.9 \ eventtimers.9 \ extattr.9 \ fail.9 \ fdt_pinctrl.9 \ fetch.9 \ firmware.9 \ fpu_kern.9 \ g_access.9 \ g_attach.9 \ g_bio.9 \ g_consumer.9 \ g_data.9 \ get_cyclecount.9 \ getenv.9 \ getnewvnode.9 \ g_event.9 \ g_geom.9 \ g_provider.9 \ g_provider_by_name.9 \ groupmember.9 \ g_wither_geom.9 \ hash.9 \ hashinit.9 \ hexdump.9 \ hhook.9 \ ieee80211.9 \ ieee80211_amrr.9 \ ieee80211_beacon.9 \ ieee80211_bmiss.9 \ ieee80211_crypto.9 \ ieee80211_ddb.9 \ ieee80211_input.9 \ ieee80211_node.9 \ ieee80211_output.9 \ ieee80211_proto.9 \ ieee80211_radiotap.9 \ ieee80211_regdomain.9 \ ieee80211_scan.9 \ ieee80211_vap.9 \ iflib.9 \ iflibdd.9 \ iflibdi.9 \ iflibtxrx.9 \ ifnet.9 \ inittodr.9 \ insmntque.9 \ intro.9 \ ithread.9 \ KASSERT.9 \ kern_testfrwk.9 \ kernacc.9 \ kernel_mount.9 \ khelp.9 \ kobj.9 \ kproc.9 \ kqueue.9 \ kthread.9 \ ktr.9 \ lock.9 \ locking.9 \ LOCK_PROFILING.9 \ mac.9 \ make_dev.9 \ malloc.9 \ mbchain.9 \ mbuf.9 \ mbuf_tags.9 \ MD5.9 \ mdchain.9 \ memcchr.9 \ memguard.9 \ microseq.9 \ microtime.9 \ microuptime.9 \ mi_switch.9 \ mod_cc.9 \ module.9 \ MODULE_DEPEND.9 \ MODULE_PNP_INFO.9 \ MODULE_VERSION.9 \ mtx_pool.9 \ mutex.9 \ namei.9 \ netisr.9 \ nv.9 \ OF_child.9 \ OF_device_from_xref.9 \ OF_finddevice.9 \ OF_getprop.9 \ OF_node_from_xref.9 \ OF_package_to_path.9 \ ofw_bus_is_compatible.9 \ ofw_bus_status_okay.9 \ osd.9 \ owll.9 \ own.9 \ panic.9 \ PCBGROUP.9 \ p_candebug.9 \ p_cansee.9 \ pci.9 \ PCI_IOV_ADD_VF.9 \ PCI_IOV_INIT.9 \ pci_iov_schema.9 \ PCI_IOV_UNINIT.9 \ pfil.9 \ pfind.9 \ pget.9 \ pgfind.9 \ PHOLD.9 \ physio.9 \ pmap.9 \ pmap_activate.9 \ pmap_clear_modify.9 \ pmap_copy.9 \ pmap_enter.9 \ pmap_extract.9 \ pmap_growkernel.9 \ pmap_init.9 \ pmap_is_modified.9 \ pmap_is_prefaultable.9 \ pmap_map.9 \ pmap_mincore.9 \ pmap_object_init_pt.9 \ pmap_page_exists_quick.9 \ pmap_page_init.9 \ pmap_pinit.9 \ pmap_protect.9 \ pmap_qenter.9 \ pmap_quick_enter_page.9 \ pmap_release.9 \ pmap_remove.9 \ pmap_resident_count.9 \ pmap_unwire.9 \ pmap_zero_page.9 \ printf.9 \ prison_check.9 \ priv.9 \ proc_rwmem.9 \ pseudofs.9 \ psignal.9 \ pwmbus.9 \ random.9 \ random_harvest.9 \ ratecheck.9 \ redzone.9 \ refcount.9 \ resettodr.9 \ resource_int_value.9 \ rijndael.9 \ rman.9 \ rmlock.9 \ rtalloc.9 \ rtentry.9 \ runqueue.9 \ rwlock.9 \ sbuf.9 \ scheduler.9 \ SDT.9 \ securelevel_gt.9 \ selrecord.9 \ sema.9 \ seqc.9 \ sf_buf.9 \ sglist.9 \ shm_map.9 \ signal.9 \ sleep.9 \ sleepqueue.9 \ socket.9 \ stack.9 \ store.9 \ style.9 \ style.lua.9 \ ${_superio.9} \ swi.9 \ sx.9 \ syscall_helper_register.9 \ SYSCALL_MODULE.9 \ sysctl.9 \ sysctl_add_oid.9 \ sysctl_ctx_init.9 \ SYSINIT.9 \ taskqueue.9 \ tcp_functions.9 \ thread_exit.9 \ time.9 \ tvtohz.9 \ ucred.9 \ uidinfo.9 \ uio.9 \ unr.9 \ vaccess.9 \ vaccess_acl_nfs4.9 \ vaccess_acl_posix1e.9 \ vcount.9 \ vflush.9 \ VFS.9 \ vfs_busy.9 \ VFS_CHECKEXP.9 \ vfsconf.9 \ VFS_FHTOVP.9 \ vfs_getnewfsid.9 \ vfs_getopt.9 \ vfs_getvfs.9 \ VFS_MOUNT.9 \ vfs_mountedfrom.9 \ VFS_QUOTACTL.9 \ VFS_ROOT.9 \ vfs_rootmountalloc.9 \ VFS_SET.9 \ VFS_STATFS.9 \ vfs_suser.9 \ VFS_SYNC.9 \ vfs_timestamp.9 \ vfs_unbusy.9 \ VFS_UNMOUNT.9 \ vfs_unmountall.9 \ VFS_VGET.9 \ vget.9 \ vgone.9 \ vhold.9 \ vinvalbuf.9 \ vm_fault_prefault.9 \ vm_map.9 \ vm_map_check_protection.9 \ vm_map_create.9 \ vm_map_delete.9 \ vm_map_entry_resize_free.9 \ vm_map_find.9 \ vm_map_findspace.9 \ vm_map_inherit.9 \ vm_map_init.9 \ vm_map_insert.9 \ vm_map_lock.9 \ vm_map_lookup.9 \ vm_map_madvise.9 \ vm_map_max.9 \ vm_map_protect.9 \ vm_map_remove.9 \ vm_map_simplify_entry.9 \ vm_map_stack.9 \ vm_map_submap.9 \ vm_map_sync.9 \ vm_map_wire.9 \ vm_page_alloc.9 \ vm_page_bits.9 \ vm_page_busy.9 \ vm_page_deactivate.9 \ vm_page_dontneed.9 \ vm_page_aflag.9 \ vm_page_free.9 \ vm_page_grab.9 \ vm_page_insert.9 \ vm_page_lookup.9 \ vm_page_rename.9 \ vm_page_wire.9 \ vm_set_page_size.9 \ vmem.9 \ vn_fullpath.9 \ vn_isdisk.9 \ vnet.9 \ vnode.9 \ VOP_ACCESS.9 \ VOP_ACLCHECK.9 \ VOP_ADVISE.9 \ VOP_ADVLOCK.9 \ VOP_ALLOCATE.9 \ VOP_ATTRIB.9 \ VOP_BMAP.9 \ VOP_BWRITE.9 \ VOP_COPY_FILE_RANGE.9 \ VOP_CREATE.9 \ VOP_FSYNC.9 \ VOP_GETACL.9 \ VOP_GETEXTATTR.9 \ VOP_GETPAGES.9 \ VOP_INACTIVE.9 \ VOP_IOCTL.9 \ VOP_LINK.9 \ VOP_LISTEXTATTR.9 \ VOP_LOCK.9 \ VOP_LOOKUP.9 \ VOP_OPENCLOSE.9 \ VOP_PATHCONF.9 \ VOP_PRINT.9 \ VOP_RDWR.9 \ VOP_READDIR.9 \ VOP_READLINK.9 \ VOP_REALLOCBLKS.9 \ VOP_REMOVE.9 \ VOP_RENAME.9 \ VOP_REVOKE.9 \ VOP_SETACL.9 \ VOP_SETEXTATTR.9 \ VOP_STRATEGY.9 \ VOP_VPTOCNP.9 \ VOP_VPTOFH.9 \ vref.9 \ vrefcnt.9 \ vrele.9 \ vslock.9 \ watchdog.9 \ zone.9 MLINKS= unr.9 alloc_unr.9 \ unr.9 alloc_unrl.9 \ unr.9 alloc_unr_specific.9 \ unr.9 clear_unrhdr.9 \ unr.9 delete_unrhdr.9 \ unr.9 free_unr.9 \ unr.9 new_unrhdr.9 MLINKS+=accept_filter.9 accept_filt_add.9 \ accept_filter.9 accept_filt_del.9 \ accept_filter.9 accept_filt_generic_mod_event.9 \ accept_filter.9 accept_filt_get.9 MLINKS+=alq.9 ALQ.9 \ alq.9 alq_close.9 \ alq.9 alq_flush.9 \ alq.9 alq_get.9 \ alq.9 alq_getn.9 \ alq.9 alq_open.9 \ alq.9 alq_open_flags.9 \ alq.9 alq_post.9 \ alq.9 alq_post_flags.9 \ alq.9 alq_write.9 \ alq.9 alq_writen.9 MLINKS+=altq.9 ALTQ.9 MLINKS+=atomic.9 atomic_add.9 \ atomic.9 atomic_clear.9 \ atomic.9 atomic_cmpset.9 \ atomic.9 atomic_fcmpset.9 \ atomic.9 atomic_fetchadd.9 \ atomic.9 atomic_load.9 \ atomic.9 atomic_readandclear.9 \ atomic.9 atomic_set.9 \ atomic.9 atomic_store.9 \ atomic.9 atomic_subtract.9 \ atomic.9 atomic_swap.9 \ atomic.9 atomic_testandclear.9 \ atomic.9 atomic_testandset.9 \ atomic.9 atomic_thread_fence.9 MLINKS+=bhnd.9 BHND_MATCH_BOARD_TYPE.9 \ bhnd.9 BHND_MATCH_BOARD_VENDOR.9 \ bhnd.9 BHND_MATCH_CHIP_ID.9 \ bhnd.9 BHND_MATCH_CHIP_PKG.9 \ bhnd.9 BHND_MATCH_CHIP_REV.9 \ bhnd.9 BHND_MATCH_CORE_ID.9 \ bhnd.9 BHND_MATCH_CORE_VENDOR.9 \ bhnd.9 bhnd_activate_resource.9 \ bhnd.9 bhnd_alloc_pmu.9 \ bhnd.9 bhnd_alloc_resource.9 \ bhnd.9 bhnd_alloc_resource_any.9 \ bhnd.9 bhnd_alloc_resources.9 \ bhnd.9 bhnd_board_matches.9 \ bhnd.9 bhnd_bus_match_child.9 \ bhnd.9 bhnd_bus_read_1.9 \ bhnd.9 bhnd_bus_read_2.9 \ bhnd.9 bhnd_bus_read_4.9 \ bhnd.9 bhnd_bus_read_stream_1.9 \ bhnd.9 bhnd_bus_read_stream_2.9 \ bhnd.9 bhnd_bus_read_stream_4.9 \ bhnd.9 bhnd_bus_write_1.9 \ bhnd.9 bhnd_bus_write_2.9 \ bhnd.9 bhnd_bus_write_4.9 \ bhnd.9 bhnd_bus_write_stream_1.9 \ bhnd.9 bhnd_bus_write_stream_2.9 \ bhnd.9 bhnd_bus_write_stream_4.9 \ bhnd.9 bhnd_chip_matches.9 \ bhnd.9 bhnd_core_class.9 \ bhnd.9 bhnd_core_get_match_desc.9 \ bhnd.9 bhnd_core_matches.9 \ bhnd.9 bhnd_core_name.9 \ bhnd.9 bhnd_cores_equal.9 \ bhnd.9 bhnd_deactivate_resource.9 \ bhnd.9 bhnd_decode_port_rid.9 \ bhnd.9 bhnd_deregister_provider.9 \ bhnd.9 bhnd_device_lookup.9 \ bhnd.9 bhnd_device_matches.9 \ bhnd.9 bhnd_device_quirks.9 \ bhnd.9 bhnd_driver_get_erom_class.9 \ bhnd.9 bhnd_enable_clocks.9 \ bhnd.9 bhnd_find_core_class.9 \ bhnd.9 bhnd_find_core_name.9 \ bhnd.9 bhnd_format_chip_id.9 \ bhnd.9 bhnd_get_attach_type.9 \ bhnd.9 bhnd_get_chipid.9 \ bhnd.9 bhnd_get_class.9 \ bhnd.9 bhnd_get_clock_freq.9 \ bhnd.9 bhnd_get_clock_latency.9 \ bhnd.9 bhnd_get_core_index.9 \ bhnd.9 bhnd_get_core_info.9 \ bhnd.9 bhnd_get_core_unit.9 \ bhnd.9 bhnd_get_device.9 \ bhnd.9 bhnd_get_device_name.9 \ bhnd.9 bhnd_get_dma_translation.9 \ bhnd.9 bhnd_get_hwrev.9 \ bhnd.9 bhnd_get_intr_count.9 \ bhnd.9 bhnd_get_intr_ivec.9 \ bhnd.9 bhnd_get_port_count.9 \ bhnd.9 bhnd_get_port_rid.9 \ bhnd.9 bhnd_get_region_addr.9 \ bhnd.9 bhnd_get_region_count.9 \ bhnd.9 bhnd_get_vendor.9 \ bhnd.9 bhnd_get_vendor_name.9 \ bhnd.9 bhnd_hwrev_matches.9 \ bhnd.9 bhnd_is_hw_suspended.9 \ bhnd.9 bhnd_is_region_valid.9 \ bhnd.9 bhnd_map_intr.9 \ bhnd.9 bhnd_match_core.9 \ bhnd.9 bhnd_nvram_getvar.9 \ bhnd.9 bhnd_nvram_getvar_array.9 \ bhnd.9 bhnd_nvram_getvar_int.9 \ bhnd.9 bhnd_nvram_getvar_int16.9 \ bhnd.9 bhnd_nvram_getvar_int32.9 \ bhnd.9 bhnd_nvram_getvar_int8.9 \ bhnd.9 bhnd_nvram_getvar_str.9 \ bhnd.9 bhnd_nvram_getvar_uint.9 \ bhnd.9 bhnd_nvram_getvar_uint16.9 \ bhnd.9 bhnd_nvram_getvar_uint32.9 \ bhnd.9 bhnd_nvram_getvar_uint8.9 \ bhnd.9 bhnd_nvram_string_array_next.9 \ bhnd.9 bhnd_read_board_info.9 \ bhnd.9 bhnd_read_config.9 \ bhnd.9 bhnd_read_ioctl.9 \ bhnd.9 bhnd_read_iost.9 \ bhnd.9 bhnd_register_provider.9 \ bhnd.9 bhnd_release_ext_rsrc.9 \ bhnd.9 bhnd_release_pmu.9 \ bhnd.9 bhnd_release_provider.9 \ bhnd.9 bhnd_release_resource.9 \ bhnd.9 bhnd_release_resources.9 \ bhnd.9 bhnd_request_clock.9 \ bhnd.9 bhnd_request_ext_rsrc.9 \ bhnd.9 bhnd_reset_hw.9 \ bhnd.9 bhnd_retain_provider.9 \ bhnd.9 bhnd_set_custom_core_desc.9 \ bhnd.9 bhnd_set_default_core_desc.9 \ bhnd.9 bhnd_suspend_hw.9 \ bhnd.9 bhnd_unmap_intr.9 \ bhnd.9 bhnd_vendor_name.9 \ bhnd.9 bhnd_write_config.9 \ bhnd.9 bhnd_write_ioctl.9 MLINKS+=bhnd_erom.9 bhnd_erom_alloc.9 \ bhnd_erom.9 bhnd_erom_dump.9 \ bhnd_erom.9 bhnd_erom_fini_static.9 \ bhnd_erom.9 bhnd_erom_free.9 \ bhnd_erom.9 bhnd_erom_free_core_table.9 \ bhnd_erom.9 bhnd_erom_get_core_table.9 \ bhnd_erom.9 bhnd_erom_init_static.9 \ bhnd_erom.9 bhnd_erom_io.9 \ bhnd_erom.9 bhnd_erom_io_fini.9 \ bhnd_erom.9 bhnd_erom_io_map.9 \ bhnd_erom.9 bhnd_erom_io_read.9 \ bhnd_erom.9 bhnd_erom_iobus_init.9 \ bhnd_erom.9 bhnd_erom_iores_new.9 \ bhnd_erom.9 bhnd_erom_lookup_core.9 \ bhnd_erom.9 bhnd_erom_lookup_core_addr.9 \ bhnd_erom.9 bhnd_erom_probe.9 \ bhnd_erom.9 bhnd_erom_probe_driver_classes.9 MLINKS+=bitset.9 BITSET_DEFINE.9 \ bitset.9 BITSET_T_INITIALIZER.9 \ bitset.9 BITSET_FSET.9 \ bitset.9 BIT_CLR.9 \ bitset.9 BIT_COPY.9 \ bitset.9 BIT_ISSET.9 \ bitset.9 BIT_SET.9 \ bitset.9 BIT_ZERO.9 \ bitset.9 BIT_FILL.9 \ bitset.9 BIT_SETOF.9 \ bitset.9 BIT_EMPTY.9 \ bitset.9 BIT_ISFULLSET.9 \ bitset.9 BIT_FFS.9 \ bitset.9 BIT_FLS.9 \ bitset.9 BIT_COUNT.9 \ bitset.9 BIT_SUBSET.9 \ bitset.9 BIT_OVERLAP.9 \ bitset.9 BIT_CMP.9 \ bitset.9 BIT_OR.9 \ bitset.9 BIT_OR2.9 \ bitset.9 BIT_AND.9 \ bitset.9 BIT_AND2.9 \ bitset.9 BIT_ANDNOT.9 \ bitset.9 BIT_ANDNOT2.9 \ bitset.9 BIT_XOR.9 \ bitset.9 BIT_XOR2.9 \ bitset.9 BIT_CLR_ATOMIC.9 \ bitset.9 BIT_SET_ATOMIC.9 \ bitset.9 BIT_SET_ATOMIC_ACQ.9 \ bitset.9 BIT_AND_ATOMIC.9 \ bitset.9 BIT_OR_ATOMIC.9 \ bitset.9 BIT_COPY_STORE_REL.9 MLINKS+=bpf.9 bpfattach.9 \ bpf.9 bpfattach2.9 \ bpf.9 bpfdetach.9 \ bpf.9 bpf_filter.9 \ bpf.9 bpf_mtap.9 \ bpf.9 bpf_mtap2.9 \ bpf.9 bpf_tap.9 \ bpf.9 bpf_validate.9 MLINKS+=buf.9 bp.9 MLINKS+=buf_ring.9 buf_ring_alloc.9 \ buf_ring.9 buf_ring_free.9 \ buf_ring.9 buf_ring_enqueue.9 \ buf_ring.9 buf_ring_enqueue_bytes.9 \ buf_ring.9 buf_ring_dequeue_mc.9 \ buf_ring.9 buf_ring_dequeue_sc.9 \ buf_ring.9 buf_ring_count.9 \ buf_ring.9 buf_ring_empty.9 \ buf_ring.9 buf_ring_full.9 \ buf_ring.9 buf_ring_peek.9 MLINKS+=bus_activate_resource.9 bus_deactivate_resource.9 MLINKS+=bus_alloc_resource.9 bus_alloc_resource_any.9 MLINKS+=BUS_BIND_INTR.9 bus_bind_intr.9 MLINKS+=BUS_DESCRIBE_INTR.9 bus_describe_intr.9 MLINKS+=bus_dma.9 busdma.9 \ bus_dma.9 bus_dmamap_create.9 \ bus_dma.9 bus_dmamap_destroy.9 \ bus_dma.9 bus_dmamap_load.9 \ bus_dma.9 bus_dmamap_load_bio.9 \ bus_dma.9 bus_dmamap_load_ccb.9 \ bus_dma.9 bus_dmamap_load_crp.9 \ bus_dma.9 bus_dmamap_load_crp_buffer.9 \ bus_dma.9 bus_dmamap_load_mbuf.9 \ bus_dma.9 bus_dmamap_load_mbuf_sg.9 \ bus_dma.9 bus_dmamap_load_uio.9 \ bus_dma.9 bus_dmamap_sync.9 \ bus_dma.9 bus_dmamap_unload.9 \ bus_dma.9 bus_dmamem_alloc.9 \ bus_dma.9 bus_dmamem_free.9 \ bus_dma.9 bus_dma_tag_create.9 \ bus_dma.9 bus_dma_tag_destroy.9 MLINKS+=bus_generic_read_ivar.9 bus_generic_write_ivar.9 MLINKS+=BUS_GET_CPUS.9 bus_get_cpus.9 MLINKS+=bus_map_resource.9 bus_unmap_resource.9 \ bus_map_resource.9 resource_init_map_request.9 MLINKS+=BUS_READ_IVAR.9 BUS_WRITE_IVAR.9 MLINKS+=BUS_SETUP_INTR.9 bus_setup_intr.9 \ BUS_SETUP_INTR.9 BUS_TEARDOWN_INTR.9 \ BUS_SETUP_INTR.9 bus_teardown_intr.9 MLINKS+=bus_space.9 bus_space_alloc.9 \ bus_space.9 bus_space_barrier.9 \ bus_space.9 bus_space_copy_region_1.9 \ bus_space.9 bus_space_copy_region_2.9 \ bus_space.9 bus_space_copy_region_4.9 \ bus_space.9 bus_space_copy_region_8.9 \ bus_space.9 bus_space_copy_region_stream_1.9 \ bus_space.9 bus_space_copy_region_stream_2.9 \ bus_space.9 bus_space_copy_region_stream_4.9 \ bus_space.9 bus_space_copy_region_stream_8.9 \ bus_space.9 bus_space_free.9 \ bus_space.9 bus_space_map.9 \ bus_space.9 bus_space_read_1.9 \ bus_space.9 bus_space_read_2.9 \ bus_space.9 bus_space_read_4.9 \ bus_space.9 bus_space_read_8.9 \ bus_space.9 bus_space_read_multi_1.9 \ bus_space.9 bus_space_read_multi_2.9 \ bus_space.9 bus_space_read_multi_4.9 \ bus_space.9 bus_space_read_multi_8.9 \ bus_space.9 bus_space_read_multi_stream_1.9 \ bus_space.9 bus_space_read_multi_stream_2.9 \ bus_space.9 bus_space_read_multi_stream_4.9 \ bus_space.9 bus_space_read_multi_stream_8.9 \ bus_space.9 bus_space_read_region_1.9 \ bus_space.9 bus_space_read_region_2.9 \ bus_space.9 bus_space_read_region_4.9 \ bus_space.9 bus_space_read_region_8.9 \ bus_space.9 bus_space_read_region_stream_1.9 \ bus_space.9 bus_space_read_region_stream_2.9 \ bus_space.9 bus_space_read_region_stream_4.9 \ bus_space.9 bus_space_read_region_stream_8.9 \ bus_space.9 bus_space_read_stream_1.9 \ bus_space.9 bus_space_read_stream_2.9 \ bus_space.9 bus_space_read_stream_4.9 \ bus_space.9 bus_space_read_stream_8.9 \ bus_space.9 bus_space_set_multi_1.9 \ bus_space.9 bus_space_set_multi_2.9 \ bus_space.9 bus_space_set_multi_4.9 \ bus_space.9 bus_space_set_multi_8.9 \ bus_space.9 bus_space_set_multi_stream_1.9 \ bus_space.9 bus_space_set_multi_stream_2.9 \ bus_space.9 bus_space_set_multi_stream_4.9 \ bus_space.9 bus_space_set_multi_stream_8.9 \ bus_space.9 bus_space_set_region_1.9 \ bus_space.9 bus_space_set_region_2.9 \ bus_space.9 bus_space_set_region_4.9 \ bus_space.9 bus_space_set_region_8.9 \ bus_space.9 bus_space_set_region_stream_1.9 \ bus_space.9 bus_space_set_region_stream_2.9 \ bus_space.9 bus_space_set_region_stream_4.9 \ bus_space.9 bus_space_set_region_stream_8.9 \ bus_space.9 bus_space_subregion.9 \ bus_space.9 bus_space_unmap.9 \ bus_space.9 bus_space_write_1.9 \ bus_space.9 bus_space_write_2.9 \ bus_space.9 bus_space_write_4.9 \ bus_space.9 bus_space_write_8.9 \ bus_space.9 bus_space_write_multi_1.9 \ bus_space.9 bus_space_write_multi_2.9 \ bus_space.9 bus_space_write_multi_4.9 \ bus_space.9 bus_space_write_multi_8.9 \ bus_space.9 bus_space_write_multi_stream_1.9 \ bus_space.9 bus_space_write_multi_stream_2.9 \ bus_space.9 bus_space_write_multi_stream_4.9 \ bus_space.9 bus_space_write_multi_stream_8.9 \ bus_space.9 bus_space_write_region_1.9 \ bus_space.9 bus_space_write_region_2.9 \ bus_space.9 bus_space_write_region_4.9 \ bus_space.9 bus_space_write_region_8.9 \ bus_space.9 bus_space_write_region_stream_1.9 \ bus_space.9 bus_space_write_region_stream_2.9 \ bus_space.9 bus_space_write_region_stream_4.9 \ bus_space.9 bus_space_write_region_stream_8.9 \ bus_space.9 bus_space_write_stream_1.9 \ bus_space.9 bus_space_write_stream_2.9 \ bus_space.9 bus_space_write_stream_4.9 \ bus_space.9 bus_space_write_stream_8.9 MLINKS+=byteorder.9 be16dec.9 \ byteorder.9 be16enc.9 \ byteorder.9 be16toh.9 \ byteorder.9 be32dec.9 \ byteorder.9 be32enc.9 \ byteorder.9 be32toh.9 \ byteorder.9 be64dec.9 \ byteorder.9 be64enc.9 \ byteorder.9 be64toh.9 \ byteorder.9 bswap16.9 \ byteorder.9 bswap32.9 \ byteorder.9 bswap64.9 \ byteorder.9 htobe16.9 \ byteorder.9 htobe32.9 \ byteorder.9 htobe64.9 \ byteorder.9 htole16.9 \ byteorder.9 htole32.9 \ byteorder.9 htole64.9 \ byteorder.9 le16dec.9 \ byteorder.9 le16enc.9 \ byteorder.9 le16toh.9 \ byteorder.9 le32dec.9 \ byteorder.9 le32enc.9 \ byteorder.9 le32toh.9 \ byteorder.9 le64dec.9 \ byteorder.9 le64enc.9 \ byteorder.9 le64toh.9 MLINKS+=callout.9 callout_active.9 \ callout.9 callout_async_drain.9 \ callout.9 callout_deactivate.9 \ callout.9 callout_drain.9 \ callout.9 callout_init.9 \ callout.9 callout_init_mtx.9 \ callout.9 callout_init_rm.9 \ callout.9 callout_init_rw.9 \ callout.9 callout_pending.9 \ callout.9 callout_reset.9 \ callout.9 callout_reset_curcpu.9 \ callout.9 callout_reset_on.9 \ callout.9 callout_reset_sbt.9 \ callout.9 callout_reset_sbt_curcpu.9 \ callout.9 callout_reset_sbt_on.9 \ callout.9 callout_schedule.9 \ callout.9 callout_schedule_curcpu.9 \ callout.9 callout_schedule_on.9 \ callout.9 callout_schedule_sbt.9 \ callout.9 callout_schedule_sbt_curcpu.9 \ callout.9 callout_schedule_sbt_on.9 \ callout.9 callout_stop.9 \ callout.9 callout_when.9 MLINKS+=cnv.9 cnvlist.9 \ cnv.9 cnvlist_free_binary.9 \ cnv.9 cnvlist_free_bool.9 \ cnv.9 cnvlist_free_bool_array.9 \ cnv.9 cnvlist_free_descriptor.9 \ cnv.9 cnvlist_free_descriptor_array.9 \ cnv.9 cnvlist_free_null.9 \ cnv.9 cnvlist_free_number.9 \ cnv.9 cnvlist_free_number_array.9 \ cnv.9 cnvlist_free_nvlist.9 \ cnv.9 cnvlist_free_nvlist_array.9 \ cnv.9 cnvlist_free_string.9 \ cnv.9 cnvlist_free_string_array.9 \ cnv.9 cnvlist_get_binary.9 \ cnv.9 cnvlist_get_bool.9 \ cnv.9 cnvlist_get_bool_array.9 \ cnv.9 cnvlist_get_descriptor.9 \ cnv.9 cnvlist_get_descriptor_array.9 \ cnv.9 cnvlist_get_number.9 \ cnv.9 cnvlist_get_number_array.9 \ cnv.9 cnvlist_get_nvlist.9 \ cnv.9 cnvlist_get_nvlist_array.9 \ cnv.9 cnvlist_get_string.9 \ cnv.9 cnvlist_get_string_array.9 \ cnv.9 cnvlist_take_binary.9 \ cnv.9 cnvlist_take_bool.9 \ cnv.9 cnvlist_take_bool_array.9 \ cnv.9 cnvlist_take_descriptor.9 \ cnv.9 cnvlist_take_descriptor_array.9 \ cnv.9 cnvlist_take_number.9 \ cnv.9 cnvlist_take_number_array.9 \ cnv.9 cnvlist_take_nvlist.9 \ cnv.9 cnvlist_take_nvlist_array.9 \ cnv.9 cnvlist_take_string.9 \ cnv.9 cnvlist_take_string_array.9 MLINKS+=condvar.9 cv_broadcast.9 \ condvar.9 cv_broadcastpri.9 \ condvar.9 cv_destroy.9 \ condvar.9 cv_init.9 \ condvar.9 cv_signal.9 \ condvar.9 cv_timedwait.9 \ condvar.9 cv_timedwait_sig.9 \ condvar.9 cv_timedwait_sig_sbt.9 \ condvar.9 cv_wait.9 \ condvar.9 cv_wait_sig.9 \ condvar.9 cv_wait_unlock.9 \ condvar.9 cv_wmesg.9 MLINKS+=config_intrhook.9 config_intrhook_disestablish.9 \ config_intrhook.9 config_intrhook_establish.9 \ config_intrhook.9 config_intrhook_oneshot.9 MLINKS+=contigmalloc.9 contigmalloc_domainset.9 \ contigmalloc.9 contigfree.9 MLINKS+=casuword.9 casueword.9 \ casuword.9 casueword32.9 \ casuword.9 casuword32.9 MLINKS+=copy.9 copyin.9 \ copy.9 copyin_nofault.9 \ copy.9 copyinstr.9 \ copy.9 copyout.9 \ copy.9 copyout_nofault.9 \ copy.9 copystr.9 MLINKS+=counter.9 counter_u64_alloc.9 \ counter.9 counter_u64_free.9 \ counter.9 counter_u64_add.9 \ counter.9 counter_enter.9 \ counter.9 counter_exit.9 \ counter.9 counter_u64_add_protected.9 \ counter.9 counter_u64_fetch.9 \ counter.9 counter_u64_zero.9 \ counter.9 SYSCTL_COUNTER_U64.9 \ counter.9 SYSCTL_ADD_COUNTER_U64.9 \ counter.9 SYSCTL_COUNTER_U64_ARRAY.9 \ counter.9 SYSCTL_ADD_COUNTER_U64_ARRAY.9 MLINKS+=cpuset.9 CPUSET_T_INITIALIZER.9 \ cpuset.9 CPUSET_FSET.9 \ cpuset.9 CPU_CLR.9 \ cpuset.9 CPU_COPY.9 \ cpuset.9 CPU_ISSET.9 \ cpuset.9 CPU_SET.9 \ cpuset.9 CPU_ZERO.9 \ cpuset.9 CPU_FILL.9 \ cpuset.9 CPU_SETOF.9 \ cpuset.9 CPU_EMPTY.9 \ cpuset.9 CPU_ISFULLSET.9 \ cpuset.9 CPU_FFS.9 \ cpuset.9 CPU_COUNT.9 \ cpuset.9 CPU_SUBSET.9 \ cpuset.9 CPU_OVERLAP.9 \ cpuset.9 CPU_CMP.9 \ cpuset.9 CPU_OR.9 \ cpuset.9 CPU_AND.9 \ cpuset.9 CPU_ANDNOT.9 \ cpuset.9 CPU_CLR_ATOMIC.9 \ cpuset.9 CPU_SET_ATOMIC.9 \ cpuset.9 CPU_SET_ATOMIC_ACQ.9 \ cpuset.9 CPU_AND_ATOMIC.9 \ cpuset.9 CPU_OR_ATOMIC.9 \ cpuset.9 CPU_COPY_STORE_REL.9 MLINKS+=critical_enter.9 critical.9 \ critical_enter.9 critical_exit.9 MLINKS+=crypto_asym.9 crypto_kdispatch.9 \ crypto_asym.9 crypto_kdone.9 \ crypto_asym.9 crypto_kregister.9 \ crypto_asym.9 CRYPTODEV_KPROCESS.9 MLINKS+=crypto_buffer.9 crypto_apply.9 \ crypto_buffer.9 crypto_apply_buf.9 \ crypto_buffer.9 crypto_buffer_contiguous_segment.9 \ crypto_buffer.9 crypto_buffer_len.9 \ crypto_buffer.9 crypto_contiguous_segment.9 \ crypto_buffer.9 crypto_cursor_init.9 \ crypto_buffer.9 crypto_cursor_advance.9 \ crypto_buffer.9 crypto_cursor_copyback.9 \ crypto_buffer.9 crypto_cursor_copydata.9 \ crypto_buffer.9 crypto_cursor_copydata_noadv.9 \ crypto_buffer.9 crypto_cursor_segbase.9 \ crypto_buffer.9 crypto_cursor_seglen.9 \ crypto_buffer.9 CRYPTO_HAS_OUTPUT_BUFFER.9 MLINKS+=crypto_driver.9 crypto_copyback.9 \ crypto_driver.9 crypto_copydata.9 \ crypto_driver.9 crypto_done.9 \ crypto_driver.9 crypto_get_driverid.9 \ crypto_driver.9 crypto_get_driver_session.9 \ crypto_driver.9 crypto_read_iv.9 \ crypto_driver.9 crypto_unblock.9 \ crypto_driver.9 crypto_unregister_all.9 \ crypto_driver.9 CRYPTODEV_FREESESSION.9 \ crypto_driver.9 CRYPTODEV_NEWSESSION.9 \ crypto_driver.9 CRYPTODEV_PROBESESSION.9 \ crypto_driver.9 CRYPTODEV_PROCESS.9 \ crypto_driver.9 hmac_init_ipad.9 \ crypto_driver.9 hmac_init_opad.9 MLINKS+=crypto_request.9 crypto_destroyreq.9 \ crypto_request.9 crypto_dispatch.9 \ crypto_request.9 crypto_freereq.9 \ crypto_request.9 crypto_getreq.9 \ crypto_request.9 crypto_initreq.9 \ crypto_request.9 crypto_use_buf.9 \ crypto_request.9 crypto_use_mbuf.9 \ crypto_request.9 crypto_use_output_buf.9 \ crypto_request.9 crypto_use_output_mbuf.9 \ crypto_request.9 crypto_use_output_uio.9 \ crypto_request.9 crypto_use_uio.9 MLINKS+=crypto_session.9 crypto_auth_hash.9 \ crypto_session.9 crypto_cipher.9 \ crypto_session.9 crypto_get_params.9 \ crypto_session.9 crypto_newsession.9 \ crypto_session.9 crypto_freesession.9 MLINKS+=DB_COMMAND.9 DB_SHOW_ALL_COMMAND.9 \ DB_COMMAND.9 DB_SHOW_COMMAND.9 MLINKS+=DECLARE_MODULE.9 DECLARE_MODULE_TIED.9 MLINKS+=dev_clone.9 drain_dev_clone_events.9 MLINKS+=dev_refthread.9 devvn_refthread.9 \ dev_refthread.9 dev_relthread.9 MLINKS+=devfs_set_cdevpriv.9 devfs_clear_cdevpriv.9 \ devfs_set_cdevpriv.9 devfs_get_cdevpriv.9 MLINKS+=device_add_child.9 device_add_child_ordered.9 MLINKS+=device_enable.9 device_disable.9 \ device_enable.9 device_is_enabled.9 MLINKS+=device_get_ivars.9 device_set_ivars.9 MLINKS+=device_get_name.9 device_get_nameunit.9 MLINKS+=device_get_state.9 device_busy.9 \ device_get_state.9 device_is_alive.9 \ device_get_state.9 device_is_attached.9 \ device_get_state.9 device_unbusy.9 MLINKS+=device_get_sysctl.9 device_get_sysctl_ctx.9 \ device_get_sysctl.9 device_get_sysctl_tree.9 MLINKS+=device_quiet.9 device_is_quiet.9 \ device_quiet.9 device_verbose.9 MLINKS+=device_set_desc.9 device_get_desc.9 \ device_set_desc.9 device_set_desc_copy.9 MLINKS+=device_set_flags.9 device_get_flags.9 MLINKS+=devstat.9 devicestat.9 \ devstat.9 devstat_new_entry.9 \ devstat.9 devstat_end_transaction.9 \ devstat.9 devstat_end_transaction_bio.9 \ devstat.9 devstat_remove_entry.9 \ devstat.9 devstat_start_transaction.9 \ devstat.9 devstat_start_transaction_bio.9 MLINKS+=disk.9 disk_add_alias.9 \ disk.9 disk_alloc.9 \ disk.9 disk_create.9 \ disk.9 disk_destroy.9 \ disk.9 disk_gone.9 \ disk.9 disk_resize.9 MLINKS+=dnv.9 dnvlist.9 \ dnv.9 dnvlist_get_binary.9 \ dnv.9 dnvlist_get_bool.9 \ dnv.9 dnvlist_get_descriptor.9 \ dnv.9 dnvlist_get_number.9 \ dnv.9 dnvlist_get_nvlist.9 \ dnv.9 dnvlist_get_string.9 \ dnv.9 dnvlist_take_binary.9 \ dnv.9 dnvlist_take_bool.9 \ dnv.9 dnvlist_take_descriptor.9 \ dnv.9 dnvlist_take_number.9 \ dnv.9 dnvlist_take_nvlist.9 \ dnv.9 dnvlist_take_string.9 MLINKS+=domain.9 DOMAIN_SET.9 \ domain.9 domain_add.9 \ domain.9 pfctlinput.9 \ domain.9 pfctlinput2.9 \ domain.9 pffinddomain.9 \ domain.9 pffindproto.9 \ domain.9 pffindtype.9 MLINKS+=drbr.9 drbr_free.9 \ drbr.9 drbr_enqueue.9 \ drbr.9 drbr_dequeue.9 \ drbr.9 drbr_dequeue_cond.9 \ drbr.9 drbr_flush.9 \ drbr.9 drbr_empty.9 \ drbr.9 drbr_inuse.9 \ drbr.9 drbr_stats_update.9 MLINKS+=DRIVER_MODULE.9 DRIVER_MODULE_ORDERED.9 \ DRIVER_MODULE.9 EARLY_DRIVER_MODULE.9 \ DRIVER_MODULE.9 EARLY_DRIVER_MODULE_ORDERED.9 MLINKS+=epoch.9 epoch_context.9 \ epoch.9 epoch_alloc.9 \ epoch.9 epoch_free.9 \ epoch.9 epoch_enter.9 \ epoch.9 epoch_exit.9 \ epoch.9 epoch_wait.9 \ epoch.9 epoch_call.9 \ epoch.9 epoch_drain_callbacks.9 \ epoch.9 in_epoch.9 MLINKS+=EVENTHANDLER.9 EVENTHANDLER_DECLARE.9 \ EVENTHANDLER.9 EVENTHANDLER_DEFINE.9 \ EVENTHANDLER.9 EVENTHANDLER_DEREGISTER.9 \ EVENTHANDLER.9 eventhandler_deregister.9 \ EVENTHANDLER.9 eventhandler_find_list.9 \ EVENTHANDLER.9 EVENTHANDLER_INVOKE.9 \ EVENTHANDLER.9 eventhandler_prune_list.9 \ EVENTHANDLER.9 EVENTHANDLER_REGISTER.9 \ EVENTHANDLER.9 eventhandler_register.9 MLINKS+=eventtimers.9 et_register.9 \ eventtimers.9 et_deregister.9 \ eventtimers.9 et_ban.9 \ eventtimers.9 et_find.9 \ eventtimers.9 et_free.9 \ eventtimers.9 et_init.9 \ eventtimers.9 ET_LOCK.9 \ eventtimers.9 ET_UNLOCK.9 \ eventtimers.9 et_start.9 \ eventtimers.9 et_stop.9 MLINKS+=fail.9 KFAIL_POINT_CODE.9 \ fail.9 KFAIL_POINT_ERROR.9 \ fail.9 KFAIL_POINT_GOTO.9 \ fail.9 KFAIL_POINT_RETURN.9 \ fail.9 KFAIL_POINT_RETURN_VOID.9 MLINKS+=fdt_pinctrl.9 fdt_pinctrl_configure.9 \ fdt_pinctrl.9 fdt_pinctrl_configure_by_name.9 \ fdt_pinctrl.9 fdt_pinctrl_configure_tree.9 \ fdt_pinctrl.9 fdt_pinctrl_register.9 MLINKS+=fetch.9 fubyte.9 \ fetch.9 fuword.9 \ fetch.9 fuword16.9 \ fetch.9 fuword32.9 \ fetch.9 fuword64.9 \ fetch.9 fueword.9 \ fetch.9 fueword32.9 \ fetch.9 fueword64.9 MLINKS+=firmware.9 firmware_get.9 \ firmware.9 firmware_put.9 \ firmware.9 firmware_register.9 \ firmware.9 firmware_unregister.9 MLINKS+=fpu_kern.9 fpu_kern_alloc_ctx.9 \ fpu_kern.9 fpu_kern_free_ctx.9 \ fpu_kern.9 fpu_kern_enter.9 \ fpu_kern.9 fpu_kern_leave.9 \ fpu_kern.9 fpu_kern_thread.9 \ fpu_kern.9 is_fpu_kern_thread.9 MLINKS+=g_attach.9 g_detach.9 MLINKS+=g_bio.9 g_alloc_bio.9 \ g_bio.9 g_clone_bio.9 \ g_bio.9 g_destroy_bio.9 \ g_bio.9 g_duplicate_bio.9 \ g_bio.9 g_format_bio.9 \ g_bio.9 g_new_bio.9 \ g_bio.9 g_print_bio.9 \ g_bio.9 g_reset_bio.9 MLINKS+=g_consumer.9 g_destroy_consumer.9 \ g_consumer.9 g_new_consumer.9 MLINKS+=g_data.9 g_read_data.9 \ g_data.9 g_write_data.9 MLINKS+=getenv.9 freeenv.9 \ getenv.9 getenv_int.9 \ getenv.9 getenv_long.9 \ getenv.9 getenv_string.9 \ getenv.9 getenv_quad.9 \ getenv.9 getenv_uint.9 \ getenv.9 getenv_ulong.9 \ getenv.9 kern_getenv.9 \ getenv.9 kern_setenv.9 \ getenv.9 kern_unsetenv.9 \ getenv.9 setenv.9 \ getenv.9 testenv.9 \ getenv.9 unsetenv.9 MLINKS+=g_event.9 g_cancel_event.9 \ g_event.9 g_post_event.9 \ g_event.9 g_waitfor_event.9 MLINKS+=g_geom.9 g_destroy_geom.9 \ g_geom.9 g_new_geomf.9 MLINKS+=g_provider.9 g_destroy_provider.9 \ g_provider.9 g_error_provider.9 \ g_provider.9 g_new_providerf.9 MLINKS+=hash.9 hash32.9 \ hash.9 hash32_buf.9 \ hash.9 hash32_str.9 \ hash.9 hash32_stre.9 \ hash.9 hash32_strn.9 \ hash.9 hash32_strne.9 \ hash.9 jenkins_hash.9 \ hash.9 jenkins_hash32.9 MLINKS+=hashinit.9 hashdestroy.9 \ hashinit.9 hashinit_flags.9 \ hashinit.9 phashinit.9 MLINKS+=hhook.9 hhook_head_register.9 \ hhook.9 hhook_head_deregister.9 \ hhook.9 hhook_head_deregister_lookup.9 \ hhook.9 hhook_run_hooks.9 \ hhook.9 HHOOKS_RUN_IF.9 \ hhook.9 HHOOKS_RUN_LOOKUP_IF.9 MLINKS+=ieee80211.9 ieee80211_ifattach.9 \ ieee80211.9 ieee80211_ifdetach.9 MLINKS+=ieee80211_amrr.9 ieee80211_amrr_choose.9 \ ieee80211_amrr.9 ieee80211_amrr_cleanup.9 \ ieee80211_amrr.9 ieee80211_amrr_init.9 \ ieee80211_amrr.9 ieee80211_amrr_node_init.9 \ ieee80211_amrr.9 ieee80211_amrr_setinterval.9 \ ieee80211_amrr.9 ieee80211_amrr_tx_complete.9 \ ieee80211_amrr.9 ieee80211_amrr_tx_update.9 MLINKS+=ieee80211_beacon.9 ieee80211_beacon_alloc.9 \ ieee80211_beacon.9 ieee80211_beacon_notify.9 \ ieee80211_beacon.9 ieee80211_beacon_update.9 MLINKS+=ieee80211_bmiss.9 ieee80211_beacon_miss.9 MLINKS+=ieee80211_crypto.9 ieee80211_crypto_available.9 \ ieee80211_crypto.9 ieee80211_crypto_decap.9 \ ieee80211_crypto.9 ieee80211_crypto_delglobalkeys.9 \ ieee80211_crypto.9 ieee80211_crypto_delkey.9 \ ieee80211_crypto.9 ieee80211_crypto_demic.9 \ ieee80211_crypto.9 ieee80211_crypto_encap.9 \ ieee80211_crypto.9 ieee80211_crypto_enmic.9 \ ieee80211_crypto.9 ieee80211_crypto_newkey.9 \ ieee80211_crypto.9 ieee80211_crypto_register.9 \ ieee80211_crypto.9 ieee80211_crypto_reload_keys.9 \ ieee80211_crypto.9 ieee80211_crypto_setkey.9 \ ieee80211_crypto.9 ieee80211_crypto_unregister.9 \ ieee80211_crypto.9 ieee80211_key_update_begin.9 \ ieee80211_crypto.9 ieee80211_key_update_end.9 \ ieee80211_crypto.9 ieee80211_notify_michael_failure.9 \ ieee80211_crypto.9 ieee80211_notify_replay_failure.9 MLINKS+=ieee80211_input.9 ieee80211_input_all.9 MLINKS+=ieee80211_node.9 ieee80211_dump_node.9 \ ieee80211_node.9 ieee80211_dump_nodes.9 \ ieee80211_node.9 ieee80211_find_rxnode.9 \ ieee80211_node.9 ieee80211_find_rxnode_withkey.9 \ ieee80211_node.9 ieee80211_free_node.9 \ ieee80211_node.9 ieee80211_iterate_nodes.9 \ ieee80211_node.9 ieee80211_ref_node.9 \ ieee80211_node.9 ieee80211_unref_node.9 MLINKS+=ieee80211_output.9 ieee80211_process_callback.9 \ ieee80211_output.9 M_SEQNO_GET.9 \ ieee80211_output.9 M_WME_GETAC.9 MLINKS+=ieee80211_proto.9 ieee80211_new_state.9 \ ieee80211_proto.9 ieee80211_resume_all.9 \ ieee80211_proto.9 ieee80211_start_all.9 \ ieee80211_proto.9 ieee80211_stop_all.9 \ ieee80211_proto.9 ieee80211_suspend_all.9 \ ieee80211_proto.9 ieee80211_waitfor_parent.9 MLINKS+=ieee80211_radiotap.9 ieee80211_radiotap_active.9 \ ieee80211_radiotap.9 ieee80211_radiotap_active_vap.9 \ ieee80211_radiotap.9 ieee80211_radiotap_attach.9 \ ieee80211_radiotap.9 ieee80211_radiotap_tx.9 \ ieee80211_radiotap.9 radiotap.9 MLINKS+=ieee80211_regdomain.9 ieee80211_alloc_countryie.9 \ ieee80211_regdomain.9 ieee80211_init_channels.9 \ ieee80211_regdomain.9 ieee80211_sort_channels.9 MLINKS+=ieee80211_scan.9 ieee80211_add_scan.9 \ ieee80211_scan.9 ieee80211_bg_scan.9 \ ieee80211_scan.9 ieee80211_cancel_scan.9 \ ieee80211_scan.9 ieee80211_cancel_scan_any.9 \ ieee80211_scan.9 ieee80211_check_scan.9 \ ieee80211_scan.9 ieee80211_check_scan_current.9 \ ieee80211_scan.9 ieee80211_flush.9 \ ieee80211_scan.9 ieee80211_probe_curchan.9 \ ieee80211_scan.9 ieee80211_scan_assoc_fail.9 \ ieee80211_scan.9 ieee80211_scan_done.9 \ ieee80211_scan.9 ieee80211_scan_dump_channels.9 \ ieee80211_scan.9 ieee80211_scan_flush.9 \ ieee80211_scan.9 ieee80211_scan_iterate.9 \ ieee80211_scan.9 ieee80211_scan_next.9 \ ieee80211_scan.9 ieee80211_scan_timeout.9 \ ieee80211_scan.9 ieee80211_scanner_get.9 \ ieee80211_scan.9 ieee80211_scanner_register.9 \ ieee80211_scan.9 ieee80211_scanner_unregister.9 \ ieee80211_scan.9 ieee80211_scanner_unregister_all.9 \ ieee80211_scan.9 ieee80211_start_scan.9 MLINKS+=ieee80211_vap.9 ieee80211_vap_attach.9 \ ieee80211_vap.9 ieee80211_vap_detach.9 \ ieee80211_vap.9 ieee80211_vap_setup.9 MLINKS+=iflibdd.9 ifdi_attach_pre.9 \ iflibdd.9 ifdi_attach_post.9 \ iflibdd.9 ifdi_detach.9 \ iflibdd.9 ifdi_get_counter.9 \ iflibdd.9 ifdi_i2c_req.9 \ iflibdd.9 ifdi_init.9 \ iflibdd.9 ifdi_intr_enable.9 \ iflibdd.9 ifdi_intr_disable.9 \ iflibdd.9 ifdi_led_func.9 \ iflibdd.9 ifdi_link_intr_enable.9 \ iflibdd.9 ifdi_media_set.9 \ iflibdd.9 ifdi_media_status.9 \ iflibdd.9 ifdi_media_change.9 \ iflibdd.9 ifdi_mtu_set.9 \ iflibdd.9 ifdi_multi_set.9 \ iflibdd.9 ifdi_promisc_set.9 \ iflibdd.9 ifdi_queues_alloc.9 \ iflibdd.9 ifdi_queues_free.9 \ iflibdd.9 ifdi_queue_intr_enable.9 \ iflibdd.9 ifdi_resume.9 \ iflibdd.9 ifdi_rxq_setup.9 \ iflibdd.9 ifdi_stop.9 \ iflibdd.9 ifdi_suspend.9 \ iflibdd.9 ifdi_sysctl_int_delay.9 \ iflibdd.9 ifdi_timer.9 \ iflibdd.9 ifdi_txq_setup.9 \ iflibdd.9 ifdi_update_admin_status.9 \ iflibdd.9 ifdi_vf_add.9 \ iflibdd.9 ifdi_vflr_handle.9 \ iflibdd.9 ifdi_vlan_register.9 \ iflibdd.9 ifdi_vlan_unregister.9 \ iflibdd.9 ifdi_watchdog_reset.9 \ iflibdd.9 iov_init.9 \ iflibdd.9 iov_uinit.9 MLINKS+=iflibdi.9 iflib_add_int_delay_sysctl.9 \ iflibdi.9 iflib_device_attach.9 \ iflibdi.9 iflib_device_deregister.9 \ iflibdi.9 iflib_device_detach.9 \ iflibdi.9 iflib_device_suspend.9 \ iflibdi.9 iflib_device_register.9 \ iflibdi.9 iflib_device_resume.9 \ iflibdi.9 iflib_led_create.9 \ iflibdi.9 iflib_irq_alloc.9 \ iflibdi.9 iflib_irq_alloc_generic.9 \ iflibdi.9 iflib_link_intr_deferred.9 \ iflibdi.9 iflib_link_state_change.9 \ iflibdi.9 iflib_rx_intr_deferred.9 \ iflibdi.9 iflib_tx_intr_deferred.9 MLINKS+=iflibtxrx.9 isc_rxd_available.9 \ iflibtxrx.9 isc_rxd_refill.9 \ iflibtxrx.9 isc_rxd_flush.9 \ iflibtxrx.9 isc_rxd_pkt_get.9 \ iflibtxrx.9 isc_txd_credits_update.9 \ iflibtxrx.9 isc_txd_encap.9 \ iflibtxrx.9 isc_txd_flush.9 MLINKS+=ifnet.9 if_addmulti.9 \ ifnet.9 if_alloc.9 \ ifnet.9 if_alloc_dev.9 \ ifnet.9 if_alloc_domain.9 \ ifnet.9 if_allmulti.9 \ ifnet.9 if_attach.9 \ ifnet.9 if_data.9 \ ifnet.9 IF_DEQUEUE.9 \ ifnet.9 if_delmulti.9 \ ifnet.9 if_detach.9 \ ifnet.9 if_down.9 \ ifnet.9 if_findmulti.9 \ ifnet.9 if_free.9 \ ifnet.9 if_free_type.9 \ ifnet.9 if_up.9 \ ifnet.9 ifa_free.9 \ ifnet.9 ifa_ifwithaddr.9 \ ifnet.9 ifa_ifwithdstaddr.9 \ ifnet.9 ifa_ifwithnet.9 \ ifnet.9 ifa_ref.9 \ ifnet.9 ifaddr.9 \ ifnet.9 ifaddr_byindex.9 \ ifnet.9 ifaof_ifpforaddr.9 \ ifnet.9 ifioctl.9 \ ifnet.9 ifpromisc.9 \ ifnet.9 ifqueue.9 \ ifnet.9 ifunit.9 \ ifnet.9 ifunit_ref.9 MLINKS+=insmntque.9 insmntque1.9 MLINKS+=ithread.9 ithread_add_handler.9 \ ithread.9 ithread_create.9 \ ithread.9 ithread_destroy.9 \ ithread.9 ithread_priority.9 \ ithread.9 ithread_remove_handler.9 \ ithread.9 ithread_schedule.9 MLINKS+=kernacc.9 useracc.9 MLINKS+=kernel_mount.9 free_mntarg.9 \ kernel_mount.9 kernel_vmount.9 \ kernel_mount.9 mount_arg.9 \ kernel_mount.9 mount_argb.9 \ kernel_mount.9 mount_argf.9 \ kernel_mount.9 mount_argsu.9 MLINKS+=khelp.9 khelp_add_hhook.9 \ khelp.9 KHELP_DECLARE_MOD.9 \ khelp.9 KHELP_DECLARE_MOD_UMA.9 \ khelp.9 khelp_destroy_osd.9 \ khelp.9 khelp_get_id.9 \ khelp.9 khelp_get_osd.9 \ khelp.9 khelp_init_osd.9 \ khelp.9 khelp_remove_hhook.9 MLINKS+=kobj.9 DEFINE_CLASS.9 \ kobj.9 kobj_class_compile.9 \ kobj.9 kobj_class_compile_static.9 \ kobj.9 kobj_class_free.9 \ kobj.9 kobj_create.9 \ kobj.9 kobj_delete.9 \ kobj.9 kobj_init.9 \ kobj.9 kobj_init_static.9 MLINKS+=kproc.9 kproc_create.9 \ kproc.9 kproc_exit.9 \ kproc.9 kproc_kthread_add.9 \ kproc.9 kproc_resume.9 \ kproc.9 kproc_shutdown.9 \ kproc.9 kproc_start.9 \ kproc.9 kproc_suspend.9 \ kproc.9 kproc_suspend_check.9 \ kproc.9 kthread_create.9 MLINKS+=kqueue.9 knlist_add.9 \ kqueue.9 knlist_clear.9 \ kqueue.9 knlist_delete.9 \ kqueue.9 knlist_destroy.9 \ kqueue.9 knlist_empty.9 \ kqueue.9 knlist_init.9 \ kqueue.9 knlist_init_mtx.9 \ kqueue.9 knlist_init_rw_reader.9 \ kqueue.9 knlist_remove.9 \ kqueue.9 knlist_remove_inevent.9 \ kqueue.9 knote_fdclose.9 \ kqueue.9 KNOTE_LOCKED.9 \ kqueue.9 KNOTE_UNLOCKED.9 \ kqueue.9 kqfd_register.9 \ kqueue.9 kqueue_add_filteropts.9 \ kqueue.9 kqueue_del_filteropts.9 MLINKS+=kthread.9 kthread_add.9 \ kthread.9 kthread_exit.9 \ kthread.9 kthread_resume.9 \ kthread.9 kthread_shutdown.9 \ kthread.9 kthread_start.9 \ kthread.9 kthread_suspend.9 \ kthread.9 kthread_suspend_check.9 MLINKS+=ktr.9 CTR0.9 \ ktr.9 CTR1.9 \ ktr.9 CTR2.9 \ ktr.9 CTR3.9 \ ktr.9 CTR4.9 \ ktr.9 CTR5.9 \ ktr.9 CTR6.9 MLINKS+=lock.9 lockdestroy.9 \ lock.9 lockinit.9 \ lock.9 lockmgr.9 \ lock.9 lockmgr_args.9 \ lock.9 lockmgr_args_rw.9 \ lock.9 lockmgr_assert.9 \ lock.9 lockmgr_disown.9 \ lock.9 lockmgr_printinfo.9 \ lock.9 lockmgr_recursed.9 \ lock.9 lockmgr_rw.9 \ lock.9 lockstatus.9 MLINKS+=LOCK_PROFILING.9 MUTEX_PROFILING.9 MLINKS+=make_dev.9 destroy_dev.9 \ make_dev.9 destroy_dev_drain.9 \ make_dev.9 destroy_dev_sched.9 \ make_dev.9 destroy_dev_sched_cb.9 \ make_dev.9 dev_depends.9 \ make_dev.9 make_dev_alias.9 \ make_dev.9 make_dev_alias_p.9 \ make_dev.9 make_dev_cred.9 \ make_dev.9 make_dev_credf.9 \ make_dev.9 make_dev_p.9 \ make_dev.9 make_dev_s.9 MLINKS+=malloc.9 free.9 \ malloc.9 malloc_domainset.9 \ malloc.9 mallocarray.9 \ malloc.9 MALLOC_DECLARE.9 \ malloc.9 MALLOC_DEFINE.9 \ malloc.9 realloc.9 \ malloc.9 reallocf.9 MLINKS+=mbchain.9 mb_detach.9 \ mbchain.9 mb_done.9 \ mbchain.9 mb_fixhdr.9 \ mbchain.9 mb_init.9 \ mbchain.9 mb_initm.9 \ mbchain.9 mb_put_int64be.9 \ mbchain.9 mb_put_int64le.9 \ mbchain.9 mb_put_mbuf.9 \ mbchain.9 mb_put_mem.9 \ mbchain.9 mb_put_uint16be.9 \ mbchain.9 mb_put_uint16le.9 \ mbchain.9 mb_put_uint32be.9 \ mbchain.9 mb_put_uint32le.9 \ mbchain.9 mb_put_uint8.9 \ mbchain.9 mb_put_uio.9 \ mbchain.9 mb_reserve.9 MLINKS+=\ mbuf.9 m_adj.9 \ mbuf.9 m_align.9 \ mbuf.9 M_ALIGN.9 \ mbuf.9 m_append.9 \ mbuf.9 m_apply.9 \ mbuf.9 m_cat.9 \ mbuf.9 m_catpkt.9 \ mbuf.9 MCHTYPE.9 \ mbuf.9 MCLGET.9 \ mbuf.9 m_collapse.9 \ mbuf.9 m_copyback.9 \ mbuf.9 m_copydata.9 \ mbuf.9 m_copym.9 \ mbuf.9 m_copypacket.9 \ mbuf.9 m_copyup.9 \ mbuf.9 m_defrag.9 \ mbuf.9 m_devget.9 \ mbuf.9 m_dup.9 \ mbuf.9 m_dup_pkthdr.9 \ mbuf.9 MEXTADD.9 \ mbuf.9 m_fixhdr.9 \ mbuf.9 m_free.9 \ mbuf.9 m_freem.9 \ mbuf.9 MGET.9 \ mbuf.9 m_get.9 \ mbuf.9 m_get2.9 \ mbuf.9 m_getjcl.9 \ mbuf.9 m_getcl.9 \ mbuf.9 MGETHDR.9 \ mbuf.9 m_gethdr.9 \ mbuf.9 m_getm.9 \ mbuf.9 m_getptr.9 \ mbuf.9 MH_ALIGN.9 \ mbuf.9 M_LEADINGSPACE.9 \ mbuf.9 m_length.9 \ mbuf.9 M_MOVE_PKTHDR.9 \ mbuf.9 m_move_pkthdr.9 \ mbuf.9 M_PREPEND.9 \ mbuf.9 m_prepend.9 \ mbuf.9 m_pulldown.9 \ mbuf.9 m_pullup.9 \ mbuf.9 m_split.9 \ mbuf.9 mtod.9 \ mbuf.9 M_TRAILINGSPACE.9 \ mbuf.9 m_unshare.9 \ mbuf.9 M_WRITABLE.9 MLINKS+=\ mbuf_tags.9 m_tag_alloc.9 \ mbuf_tags.9 m_tag_copy.9 \ mbuf_tags.9 m_tag_copy_chain.9 \ mbuf_tags.9 m_tag_delete.9 \ mbuf_tags.9 m_tag_delete_chain.9 \ mbuf_tags.9 m_tag_delete_nonpersistent.9 \ mbuf_tags.9 m_tag_find.9 \ mbuf_tags.9 m_tag_first.9 \ mbuf_tags.9 m_tag_free.9 \ mbuf_tags.9 m_tag_get.9 \ mbuf_tags.9 m_tag_init.9 \ mbuf_tags.9 m_tag_locate.9 \ mbuf_tags.9 m_tag_next.9 \ mbuf_tags.9 m_tag_prepend.9 \ mbuf_tags.9 m_tag_unlink.9 MLINKS+=MD5.9 MD5Init.9 \ MD5.9 MD5Transform.9 MLINKS+=mdchain.9 md_append_record.9 \ mdchain.9 md_done.9 \ mdchain.9 md_get_int64.9 \ mdchain.9 md_get_int64be.9 \ mdchain.9 md_get_int64le.9 \ mdchain.9 md_get_mbuf.9 \ mdchain.9 md_get_mem.9 \ mdchain.9 md_get_uint16.9 \ mdchain.9 md_get_uint16be.9 \ mdchain.9 md_get_uint16le.9 \ mdchain.9 md_get_uint32.9 \ mdchain.9 md_get_uint32be.9 \ mdchain.9 md_get_uint32le.9 \ mdchain.9 md_get_uint8.9 \ mdchain.9 md_get_uio.9 \ mdchain.9 md_initm.9 \ mdchain.9 md_next_record.9 MLINKS+=microtime.9 bintime.9 \ microtime.9 getbintime.9 \ microtime.9 getmicrotime.9 \ microtime.9 getnanotime.9 \ microtime.9 nanotime.9 MLINKS+=microuptime.9 binuptime.9 \ microuptime.9 getbinuptime.9 \ microuptime.9 getmicrouptime.9 \ microuptime.9 getnanouptime.9 \ microuptime.9 getsbinuptime.9 \ microuptime.9 nanouptime.9 \ microuptime.9 sbinuptime.9 MLINKS+=mi_switch.9 cpu_switch.9 \ mi_switch.9 cpu_throw.9 MLINKS+=mod_cc.9 CCV.9 \ mod_cc.9 DECLARE_CC_MODULE.9 MLINKS+=mtx_pool.9 mtx_pool_alloc.9 \ mtx_pool.9 mtx_pool_create.9 \ mtx_pool.9 mtx_pool_destroy.9 \ mtx_pool.9 mtx_pool_find.9 \ mtx_pool.9 mtx_pool_lock.9 \ mtx_pool.9 mtx_pool_lock_spin.9 \ mtx_pool.9 mtx_pool_unlock.9 \ mtx_pool.9 mtx_pool_unlock_spin.9 MLINKS+=mutex.9 mtx_assert.9 \ mutex.9 mtx_destroy.9 \ mutex.9 mtx_init.9 \ mutex.9 mtx_initialized.9 \ mutex.9 mtx_lock.9 \ mutex.9 mtx_lock_flags.9 \ mutex.9 mtx_lock_spin.9 \ mutex.9 mtx_lock_spin_flags.9 \ mutex.9 mtx_owned.9 \ mutex.9 mtx_recursed.9 \ mutex.9 mtx_sleep.9 \ mutex.9 MTX_SYSINIT.9 \ mutex.9 mtx_trylock.9 \ mutex.9 mtx_trylock_flags.9 \ mutex.9 mtx_trylock_spin.9 \ mutex.9 mtx_trylock_spin_flags.9 \ mutex.9 mtx_unlock.9 \ mutex.9 mtx_unlock_flags.9 \ mutex.9 mtx_unlock_spin.9 \ mutex.9 mtx_unlock_spin_flags.9 MLINKS+=namei.9 NDFREE.9 \ namei.9 NDINIT.9 MLINKS+=netisr.9 netisr_clearqdrops.9 \ netisr.9 netisr_default_flow2cpu.9 \ netisr.9 netisr_dispatch.9 \ netisr.9 netisr_dispatch_src.9 \ netisr.9 netisr_get_cpucount.9 \ netisr.9 netisr_get_cpuid.9 \ netisr.9 netisr_getqdrops.9 \ netisr.9 netisr_getqlimit.9 \ netisr.9 netisr_queue.9 \ netisr.9 netisr_queue_src.9 \ netisr.9 netisr_register.9 \ netisr.9 netisr_setqlimit.9 \ netisr.9 netisr_unregister.9 MLINKS+=nv.9 libnv.9 \ nv.9 nvlist.9 \ nv.9 nvlist_add_binary.9 \ nv.9 nvlist_add_bool.9 \ nv.9 nvlist_add_bool_array.9 \ nv.9 nvlist_add_descriptor.9 \ nv.9 nvlist_add_descriptor_array.9 \ nv.9 nvlist_add_null.9 \ nv.9 nvlist_add_number.9 \ nv.9 nvlist_add_number_array.9 \ nv.9 nvlist_add_nvlist.9 \ nv.9 nvlist_add_nvlist_array.9 \ nv.9 nvlist_add_string.9 \ nv.9 nvlist_add_stringf.9 \ nv.9 nvlist_add_stringv.9 \ nv.9 nvlist_add_string_array.9 \ nv.9 nvlist_clone.9 \ nv.9 nvlist_create.9 \ nv.9 nvlist_destroy.9 \ nv.9 nvlist_dump.9 \ nv.9 nvlist_empty.9 \ nv.9 nvlist_error.9 \ nv.9 nvlist_exists.9 \ nv.9 nvlist_exists_binary.9 \ nv.9 nvlist_exists_bool.9 \ nv.9 nvlist_exists_bool_array.9 \ nv.9 nvlist_exists_descriptor.9 \ nv.9 nvlist_exists_descriptor_array.9 \ nv.9 nvlist_exists_null.9 \ nv.9 nvlist_exists_number.9 \ nv.9 nvlist_exists_number_array.9 \ nv.9 nvlist_exists_nvlist.9 \ nv.9 nvlist_exists_nvlist_array.9 \ nv.9 nvlist_exists_string.9 \ nv.9 nvlist_exists_type.9 \ nv.9 nvlist_fdump.9 \ nv.9 nvlist_flags.9 \ nv.9 nvlist_free.9 \ nv.9 nvlist_free_binary.9 \ nv.9 nvlist_free_bool.9 \ nv.9 nvlist_free_bool_array.9 \ nv.9 nvlist_free_descriptor.9 \ nv.9 nvlist_free_descriptor_array.9 \ nv.9 nvlist_free_null.9 \ nv.9 nvlist_free_number.9 \ nv.9 nvlist_free_number_array.9 \ nv.9 nvlist_free_nvlist.9 \ nv.9 nvlist_free_nvlist_array.9 \ nv.9 nvlist_free_string.9 \ nv.9 nvlist_free_string_array.9 \ nv.9 nvlist_free_type.9 \ nv.9 nvlist_get_binary.9 \ nv.9 nvlist_get_bool.9 \ nv.9 nvlist_get_bool_array.9 \ nv.9 nvlist_get_descriptor.9 \ nv.9 nvlist_get_descriptor_array.9 \ nv.9 nvlist_get_number.9 \ nv.9 nvlist_get_number_array.9 \ nv.9 nvlist_get_nvlist.9 \ nv.9 nvlist_get_nvlist_array.9 \ nv.9 nvlist_get_parent.9 \ nv.9 nvlist_get_string.9 \ nv.9 nvlist_get_string_array.9 \ nv.9 nvlist_move_binary.9 \ nv.9 nvlist_move_descriptor.9 \ nv.9 nvlist_move_descriptor_array.9 \ nv.9 nvlist_move_nvlist.9 \ nv.9 nvlist_move_nvlist_array.9 \ nv.9 nvlist_move_string.9 \ nv.9 nvlist_move_string_array.9 \ nv.9 nvlist_next.9 \ nv.9 nvlist_pack.9 \ nv.9 nvlist_recv.9 \ nv.9 nvlist_send.9 \ nv.9 nvlist_set_error.9 \ nv.9 nvlist_size.9 \ nv.9 nvlist_take_binary.9 \ nv.9 nvlist_take_bool.9 \ nv.9 nvlist_take_bool_array.9 \ nv.9 nvlist_take_descriptor.9 \ nv.9 nvlist_take_descriptor_array.9 \ nv.9 nvlist_take_number.9 \ nv.9 nvlist_take_number_array.9 \ nv.9 nvlist_take_nvlist.9 \ nv.9 nvlist_take_nvlist_array.9 \ nv.9 nvlist_take_string.9 \ nv.9 nvlist_take_string_array.9 \ nv.9 nvlist_unpack.9 \ nv.9 nvlist_xfer.9 MLINKS+=OF_child.9 OF_parent.9 \ OF_child.9 OF_peer.9 MLINKS+=OF_device_from_xref.9 OF_device_register_xref.9 \ OF_device_from_xref.9 OF_xref_from_device.9 MLINKS+=OF_getprop.9 OF_getencprop.9 \ OF_getprop.9 OF_getencprop_alloc.9 \ OF_getprop.9 OF_getencprop_alloc_multi.9 \ OF_getprop.9 OF_getprop_alloc.9 \ OF_getprop.9 OF_getprop_alloc_multi.9 \ OF_getprop.9 OF_getproplen.9 \ OF_getprop.9 OF_hasprop.9 \ OF_getprop.9 OF_nextprop.9 \ OF_getprop.9 OF_prop_free.9 \ OF_getprop.9 OF_searchencprop.9 \ OF_getprop.9 OF_searchprop.9 \ OF_getprop.9 OF_setprop.9 MLINKS+=OF_node_from_xref.9 OF_xref_from_node.9 MLINKS+=ofw_bus_is_compatible.9 ofw_bus_is_compatible_strict.9 \ ofw_bus_is_compatible.9 ofw_bus_node_is_compatible.9 \ ofw_bus_is_compatible.9 ofw_bus_search_compatible.9 MLINKS+= ofw_bus_status_okay.9 ofw_bus_get_status.9 \ ofw_bus_status_okay.9 ofw_bus_node_status_okay.9 MLINKS+=osd.9 osd_call.9 \ osd.9 osd_del.9 \ osd.9 osd_deregister.9 \ osd.9 osd_exit.9 \ osd.9 osd_get.9 \ osd.9 osd_register.9 \ osd.9 osd_set.9 MLINKS+=panic.9 vpanic.9 MLINKS+=PCBGROUP.9 in_pcbgroup_byhash.9 \ PCBGROUP.9 in_pcbgroup_byinpcb.9 \ PCBGROUP.9 in_pcbgroup_destroy.9 \ PCBGROUP.9 in_pcbgroup_enabled.9 \ PCBGROUP.9 in_pcbgroup_init.9 \ PCBGROUP.9 in_pcbgroup_remove.9 \ PCBGROUP.9 in_pcbgroup_update.9 \ PCBGROUP.9 in_pcbgroup_update_mbuf.9 \ PCBGROUP.9 in6_pcbgroup_byhash.9 MLINKS+=pci.9 pci_alloc_msi.9 \ pci.9 pci_alloc_msix.9 \ pci.9 pci_disable_busmaster.9 \ pci.9 pci_disable_io.9 \ pci.9 pci_enable_busmaster.9 \ pci.9 pci_enable_io.9 \ pci.9 pci_find_bsf.9 \ pci.9 pci_find_cap.9 \ pci.9 pci_find_dbsf.9 \ pci.9 pci_find_device.9 \ pci.9 pci_find_extcap.9 \ pci.9 pci_find_htcap.9 \ pci.9 pci_find_pcie_root_port.9 \ pci.9 pci_get_id.9 \ pci.9 pci_get_max_read_req.9 \ pci.9 pci_get_powerstate.9 \ pci.9 pci_get_vpd_ident.9 \ pci.9 pci_get_vpd_readonly.9 \ pci.9 pci_iov_attach.9 \ pci.9 pci_iov_attach_name.9 \ pci.9 pci_iov_detach.9 \ pci.9 pci_msi_count.9 \ pci.9 pci_msix_count.9 \ pci.9 pci_msix_pba_bar.9 \ pci.9 pci_msix_table_bar.9 \ pci.9 pci_pending_msix.9 \ pci.9 pci_read_config.9 \ pci.9 pci_release_msi.9 \ pci.9 pci_remap_msix.9 \ pci.9 pci_restore_state.9 \ pci.9 pci_save_state.9 \ pci.9 pci_set_powerstate.9 \ pci.9 pci_set_max_read_req.9 \ pci.9 pci_write_config.9 \ pci.9 pcie_adjust_config.9 \ pci.9 pcie_flr.9 \ pci.9 pcie_max_completion_timeout.9 \ pci.9 pcie_read_config.9 \ pci.9 pcie_wait_for_pending_transactions.9 \ pci.9 pcie_write_config.9 MLINKS+=pci_iov_schema.9 pci_iov_schema_alloc_node.9 \ pci_iov_schema.9 pci_iov_schema_add_bool.9 \ pci_iov_schema.9 pci_iov_schema_add_string.9 \ pci_iov_schema.9 pci_iov_schema_add_uint8.9 \ pci_iov_schema.9 pci_iov_schema_add_uint16.9 \ pci_iov_schema.9 pci_iov_schema_add_uint32.9 \ pci_iov_schema.9 pci_iov_schema_add_uint64.9 \ pci_iov_schema.9 pci_iov_schema_add_unicast_mac.9 MLINKS+=pfil.9 pfil_add_hook.9 \ pfil.9 pfil_head_register.9 \ pfil.9 pfil_head_unregister.9 \ pfil.9 pfil_remove_hook.9 \ pfil.9 pfil_run_hooks.9 \ pfil.9 pfil_link.9 MLINKS+=pfind.9 zpfind.9 MLINKS+=PHOLD.9 PRELE.9 \ PHOLD.9 _PHOLD.9 \ PHOLD.9 _PRELE.9 \ PHOLD.9 PROC_ASSERT_HELD.9 \ PHOLD.9 PROC_ASSERT_NOT_HELD.9 MLINKS+=pmap_copy.9 pmap_copy_page.9 MLINKS+=pmap_extract.9 pmap_extract_and_hold.9 MLINKS+=pmap_init.9 pmap_init2.9 MLINKS+=pmap_is_modified.9 pmap_ts_referenced.9 MLINKS+=pmap_pinit.9 pmap_pinit0.9 \ pmap_pinit.9 pmap_pinit2.9 MLINKS+=pmap_qenter.9 pmap_qremove.9 MLINKS+=pmap_quick_enter_page.9 pmap_quick_remove_page.9 MLINKS+=pmap_remove.9 pmap_remove_all.9 \ pmap_remove.9 pmap_remove_pages.9 MLINKS+=pmap_resident_count.9 pmap_wired_count.9 MLINKS+=pmap_zero_page.9 pmap_zero_area.9 MLINKS+=printf.9 log.9 \ printf.9 tprintf.9 \ printf.9 uprintf.9 MLINKS+=priv.9 priv_check.9 \ priv.9 priv_check_cred.9 MLINKS+=proc_rwmem.9 proc_readmem.9 \ proc_rwmem.9 proc_writemem.9 MLINKS+=psignal.9 gsignal.9 \ psignal.9 pgsignal.9 \ psignal.9 tdsignal.9 MLINKS+=pwmbus.9 pwm.9 MLINKS+=random.9 arc4rand.9 \ random.9 arc4random.9 \ random.9 is_random_seeded.9 \ random.9 read_random.9 \ random.9 read_random_uio.9 \ random.9 srandom.9 MLINKS+=random_harvest.9 random_harvest_direct.9 \ random_harvest.9 random_harvest_fast.9 \ random_harvest.9 random_harvest_queue.9 MLINKS+=ratecheck.9 ppsratecheck.9 MLINKS+=refcount.9 refcount_acquire.9 \ refcount.9 refcount_init.9 \ refcount.9 refcount_release.9 MLINKS+=resource_int_value.9 resource_long_value.9 \ resource_int_value.9 resource_string_value.9 MLINKS+=rman.9 rman_activate_resource.9 \ rman.9 rman_adjust_resource.9 \ rman.9 rman_deactivate_resource.9 \ rman.9 rman_fini.9 \ rman.9 rman_first_free_region.9 \ rman.9 rman_get_bushandle.9 \ rman.9 rman_get_bustag.9 \ rman.9 rman_get_device.9 \ rman.9 rman_get_end.9 \ rman.9 rman_get_flags.9 \ rman.9 rman_get_mapping.9 \ rman.9 rman_get_rid.9 \ rman.9 rman_get_size.9 \ rman.9 rman_get_start.9 \ rman.9 rman_get_virtual.9 \ rman.9 rman_init.9 \ rman.9 rman_init_from_resource.9 \ rman.9 rman_is_region_manager.9 \ rman.9 rman_last_free_region.9 \ rman.9 rman_make_alignment_flags.9 \ rman.9 rman_manage_region.9 \ rman.9 rman_release_resource.9 \ rman.9 rman_reserve_resource.9 \ rman.9 rman_reserve_resource_bound.9 \ rman.9 rman_set_bushandle.9 \ rman.9 rman_set_bustag.9 \ rman.9 rman_set_mapping.9 \ rman.9 rman_set_rid.9 \ rman.9 rman_set_virtual.9 MLINKS+=rmlock.9 rm_assert.9 \ rmlock.9 rm_destroy.9 \ rmlock.9 rm_init.9 \ rmlock.9 rm_init_flags.9 \ rmlock.9 rm_rlock.9 \ rmlock.9 rm_runlock.9 \ rmlock.9 rm_sleep.9 \ rmlock.9 RM_SYSINIT.9 \ rmlock.9 RM_SYSINIT_FLAGS.9 \ rmlock.9 rm_try_rlock.9 \ rmlock.9 rm_wlock.9 \ rmlock.9 rm_wowned.9 \ rmlock.9 rm_wunlock.9 MLINKS+=rtalloc.9 rtalloc1.9 \ rtalloc.9 rtalloc_ign.9 \ rtalloc.9 RT_ADDREF.9 \ rtalloc.9 RT_LOCK.9 \ rtalloc.9 RT_REMREF.9 \ rtalloc.9 RT_RTFREE.9 \ rtalloc.9 RT_UNLOCK.9 \ rtalloc.9 RTFREE_LOCKED.9 \ rtalloc.9 RTFREE.9 \ rtalloc.9 rtfree.9 \ rtalloc.9 rtalloc1_fib.9 \ rtalloc.9 rtalloc_ign_fib.9 \ rtalloc.9 rtalloc_fib.9 MLINKS+=runqueue.9 choosethread.9 \ runqueue.9 procrunnable.9 \ runqueue.9 remrunqueue.9 \ runqueue.9 setrunqueue.9 MLINKS+=rwlock.9 rw_assert.9 \ rwlock.9 rw_destroy.9 \ rwlock.9 rw_downgrade.9 \ rwlock.9 rw_init.9 \ rwlock.9 rw_init_flags.9 \ rwlock.9 rw_initialized.9 \ rwlock.9 rw_rlock.9 \ rwlock.9 rw_runlock.9 \ rwlock.9 rw_unlock.9 \ rwlock.9 rw_sleep.9 \ rwlock.9 RW_SYSINIT.9 \ rwlock.9 RW_SYSINIT_FLAGS.9 \ rwlock.9 rw_try_rlock.9 \ rwlock.9 rw_try_upgrade.9 \ rwlock.9 rw_try_wlock.9 \ rwlock.9 rw_wlock.9 \ rwlock.9 rw_wowned.9 \ rwlock.9 rw_wunlock.9 MLINKS+=sbuf.9 sbuf_bcat.9 \ sbuf.9 sbuf_bcopyin.9 \ sbuf.9 sbuf_bcpy.9 \ sbuf.9 sbuf_cat.9 \ sbuf.9 sbuf_clear.9 \ sbuf.9 sbuf_clear_flags.9 \ sbuf.9 sbuf_copyin.9 \ sbuf.9 sbuf_cpy.9 \ sbuf.9 sbuf_data.9 \ sbuf.9 sbuf_delete.9 \ sbuf.9 sbuf_done.9 \ sbuf.9 sbuf_error.9 \ sbuf.9 sbuf_finish.9 \ sbuf.9 sbuf_get_flags.9 \ sbuf.9 sbuf_hexdump.9 \ sbuf.9 sbuf_len.9 \ sbuf.9 sbuf_new.9 \ sbuf.9 sbuf_new_auto.9 \ sbuf.9 sbuf_new_for_sysctl.9 \ sbuf.9 sbuf_nl_terminate.9 \ sbuf.9 sbuf_printf.9 \ sbuf.9 sbuf_printf_drain.9 \ sbuf.9 sbuf_putbuf.9 \ sbuf.9 sbuf_putc.9 \ sbuf.9 sbuf_set_drain.9 \ sbuf.9 sbuf_set_flags.9 \ sbuf.9 sbuf_setpos.9 \ sbuf.9 sbuf_start_section.9 \ sbuf.9 sbuf_end_section.9 \ sbuf.9 sbuf_trim.9 \ sbuf.9 sbuf_vprintf.9 MLINKS+=scheduler.9 curpriority_cmp.9 \ scheduler.9 maybe_resched.9 \ scheduler.9 propagate_priority.9 \ scheduler.9 resetpriority.9 \ scheduler.9 roundrobin.9 \ scheduler.9 roundrobin_interval.9 \ scheduler.9 schedclock.9 \ scheduler.9 schedcpu.9 \ scheduler.9 sched_setup.9 \ scheduler.9 setrunnable.9 \ scheduler.9 updatepri.9 MLINKS+=SDT.9 SDT_PROVIDER_DECLARE.9 \ SDT.9 SDT_PROVIDER_DEFINE.9 \ SDT.9 SDT_PROBE_DECLARE.9 \ SDT.9 SDT_PROBE_DEFINE.9 \ SDT.9 SDT_PROBE.9 MLINKS+=securelevel_gt.9 securelevel_ge.9 MLINKS+=selrecord.9 seldrain.9 \ selrecord.9 selwakeup.9 MLINKS+=sema.9 sema_destroy.9 \ sema.9 sema_init.9 \ sema.9 sema_post.9 \ sema.9 sema_timedwait.9 \ sema.9 sema_trywait.9 \ sema.9 sema_value.9 \ sema.9 sema_wait.9 MLINKS+=seqc.9 seqc_consistent.9 \ seqc.9 seqc_read.9 \ seqc.9 seqc_write_begin.9 \ seqc.9 seqc_write_end.9 MLINKS+=sf_buf.9 sf_buf_alloc.9 \ sf_buf.9 sf_buf_free.9 \ sf_buf.9 sf_buf_kva.9 \ sf_buf.9 sf_buf_page.9 MLINKS+=sglist.9 sglist_alloc.9 \ sglist.9 sglist_append.9 \ sglist.9 sglist_append_bio.9 \ sglist.9 sglist_append_mbuf.9 \ sglist.9 sglist_append_mbuf_epg.9 \ sglist.9 sglist_append_phys.9 \ sglist.9 sglist_append_sglist.9 \ sglist.9 sglist_append_uio.9 \ sglist.9 sglist_append_user.9 \ sglist.9 sglist_append_vmpages.9 \ sglist.9 sglist_build.9 \ sglist.9 sglist_clone.9 \ sglist.9 sglist_consume_uio.9 \ sglist.9 sglist_count.9 \ sglist.9 sglist_count_mbuf_epg.9 \ sglist.9 sglist_count_vmpages.9 \ sglist.9 sglist_free.9 \ sglist.9 sglist_hold.9 \ sglist.9 sglist_init.9 \ sglist.9 sglist_join.9 \ sglist.9 sglist_length.9 \ sglist.9 sglist_reset.9 \ sglist.9 sglist_slice.9 \ sglist.9 sglist_split.9 MLINKS+=shm_map.9 shm_unmap.9 MLINKS+=signal.9 cursig.9 \ signal.9 execsigs.9 \ signal.9 issignal.9 \ signal.9 killproc.9 \ signal.9 pgsigio.9 \ signal.9 postsig.9 \ signal.9 SETSETNEQ.9 \ signal.9 SETSETOR.9 \ signal.9 SIGADDSET.9 \ signal.9 SIG_CONTSIGMASK.9 \ signal.9 SIGDELSET.9 \ signal.9 SIGEMPTYSET.9 \ signal.9 sigexit.9 \ signal.9 SIGFILLSET.9 \ signal.9 siginit.9 \ signal.9 SIGISEMPTY.9 \ signal.9 SIGISMEMBER.9 \ signal.9 SIGNOTEMPTY.9 \ signal.9 signotify.9 \ signal.9 SIGPENDING.9 \ signal.9 SIGSETAND.9 \ signal.9 SIGSETCANTMASK.9 \ signal.9 SIGSETEQ.9 \ signal.9 SIGSETNAND.9 \ signal.9 SIG_STOPSIGMASK.9 \ signal.9 trapsignal.9 MLINKS+=sleep.9 msleep.9 \ sleep.9 msleep_sbt.9 \ sleep.9 msleep_spin.9 \ sleep.9 msleep_spin_sbt.9 \ sleep.9 pause.9 \ sleep.9 pause_sig.9 \ sleep.9 pause_sbt.9 \ sleep.9 tsleep.9 \ sleep.9 tsleep_sbt.9 \ sleep.9 wakeup.9 \ sleep.9 wakeup_one.9 \ sleep.9 wakeup_any.9 MLINKS+=sleepqueue.9 init_sleepqueues.9 \ sleepqueue.9 sleepq_abort.9 \ sleepqueue.9 sleepq_add.9 \ sleepqueue.9 sleepq_alloc.9 \ sleepqueue.9 sleepq_broadcast.9 \ sleepqueue.9 sleepq_free.9 \ sleepqueue.9 sleepq_lookup.9 \ sleepqueue.9 sleepq_lock.9 \ sleepqueue.9 sleepq_release.9 \ sleepqueue.9 sleepq_remove.9 \ sleepqueue.9 sleepq_set_timeout.9 \ sleepqueue.9 sleepq_set_timeout_sbt.9 \ sleepqueue.9 sleepq_signal.9 \ sleepqueue.9 sleepq_sleepcnt.9 \ sleepqueue.9 sleepq_timedwait.9 \ sleepqueue.9 sleepq_timedwait_sig.9 \ sleepqueue.9 sleepq_type.9 \ sleepqueue.9 sleepq_wait.9 \ sleepqueue.9 sleepq_wait_sig.9 MLINKS+=socket.9 soabort.9 \ socket.9 soaccept.9 \ socket.9 sobind.9 \ socket.9 socheckuid.9 \ socket.9 soclose.9 \ socket.9 soconnect.9 \ socket.9 socreate.9 \ socket.9 sodisconnect.9 \ socket.9 sodtor_set.9 \ socket.9 sodupsockaddr.9 \ socket.9 sofree.9 \ socket.9 sogetopt.9 \ socket.9 sohasoutofband.9 \ socket.9 solisten.9 \ socket.9 solisten_proto.9 \ socket.9 solisten_proto_check.9 \ socket.9 sonewconn.9 \ socket.9 sooptcopyin.9 \ socket.9 sooptcopyout.9 \ socket.9 sopoll.9 \ socket.9 sopoll_generic.9 \ socket.9 soreceive.9 \ socket.9 soreceive_dgram.9 \ socket.9 soreceive_generic.9 \ socket.9 soreceive_stream.9 \ socket.9 soreserve.9 \ socket.9 sorflush.9 \ socket.9 sosend.9 \ socket.9 sosend_dgram.9 \ socket.9 sosend_generic.9 \ socket.9 sosetopt.9 \ socket.9 soshutdown.9 \ socket.9 sotoxsocket.9 \ socket.9 soupcall_clear.9 \ socket.9 soupcall_set.9 \ socket.9 sowakeup.9 MLINKS+=stack.9 stack_copy.9 \ stack.9 stack_create.9 \ stack.9 stack_destroy.9 \ stack.9 stack_print.9 \ stack.9 stack_print_ddb.9 \ stack.9 stack_print_short.9 \ stack.9 stack_print_short_ddb.9 \ stack.9 stack_put.9 \ stack.9 stack_save.9 \ stack.9 stack_sbuf_print.9 \ stack.9 stack_sbuf_print_ddb.9 \ stack.9 stack_zero.9 MLINKS+=store.9 subyte.9 \ store.9 suword.9 \ store.9 suword16.9 \ store.9 suword32.9 \ store.9 suword64.9 MLINKS+=swi.9 swi_add.9 \ swi.9 swi_remove.9 \ swi.9 swi_sched.9 MLINKS+=sx.9 sx_assert.9 \ sx.9 sx_destroy.9 \ sx.9 sx_downgrade.9 \ sx.9 sx_init.9 \ sx.9 sx_init_flags.9 \ sx.9 sx_sleep.9 \ sx.9 sx_slock.9 \ sx.9 sx_slock_sig.9 \ sx.9 sx_sunlock.9 \ sx.9 SX_SYSINIT.9 \ sx.9 SX_SYSINIT_FLAGS.9 \ sx.9 sx_try_slock.9 \ sx.9 sx_try_upgrade.9 \ sx.9 sx_try_xlock.9 \ sx.9 sx_unlock.9 \ sx.9 sx_xholder.9 \ sx.9 sx_xlock.9 \ sx.9 sx_xlock_sig.9 \ sx.9 sx_xlocked.9 \ sx.9 sx_xunlock.9 MLINKS+=syscall_helper_register.9 syscall_helper_unregister.9 \ syscall_helper_register.9 SYSCALL_INIT_HELPER.9 \ syscall_helper_register.9 SYSCALL_INIT_HELPER_COMPAT.9 \ syscall_helper_register.9 SYSCALL_INIT_HELPER_COMPAT_F.9 \ syscall_helper_register.9 SYSCALL_INIT_HELPER_F.9 MLINKS+=sysctl.9 SYSCTL_DECL.9 \ sysctl.9 SYSCTL_ADD_INT.9 \ sysctl.9 SYSCTL_ADD_LONG.9 \ sysctl.9 SYSCTL_ADD_NODE.9 \ sysctl.9 SYSCTL_ADD_NODE_WITH_LABEL.9 \ sysctl.9 SYSCTL_ADD_OPAQUE.9 \ sysctl.9 SYSCTL_ADD_PROC.9 \ sysctl.9 SYSCTL_ADD_QUAD.9 \ sysctl.9 SYSCTL_ADD_ROOT_NODE.9 \ sysctl.9 SYSCTL_ADD_S8.9 \ sysctl.9 SYSCTL_ADD_S16.9 \ sysctl.9 SYSCTL_ADD_S32.9 \ sysctl.9 SYSCTL_ADD_S64.9 \ sysctl.9 SYSCTL_ADD_STRING.9 \ sysctl.9 SYSCTL_ADD_STRUCT.9 \ sysctl.9 SYSCTL_ADD_TIMEVAL_SEC.9 \ sysctl.9 SYSCTL_ADD_U8.9 \ sysctl.9 SYSCTL_ADD_U16.9 \ sysctl.9 SYSCTL_ADD_U32.9 \ sysctl.9 SYSCTL_ADD_U64.9 \ sysctl.9 SYSCTL_ADD_UAUTO.9 \ sysctl.9 SYSCTL_ADD_UINT.9 \ sysctl.9 SYSCTL_ADD_ULONG.9 \ sysctl.9 SYSCTL_ADD_UMA_CUR.9 \ sysctl.9 SYSCTL_ADD_UMA_MAX.9 \ sysctl.9 SYSCTL_ADD_UQUAD.9 \ sysctl.9 SYSCTL_CHILDREN.9 \ sysctl.9 SYSCTL_STATIC_CHILDREN.9 \ sysctl.9 SYSCTL_NODE_CHILDREN.9 \ sysctl.9 SYSCTL_PARENT.9 \ sysctl.9 SYSCTL_INT.9 \ sysctl.9 SYSCTL_INT_WITH_LABEL.9 \ sysctl.9 SYSCTL_LONG.9 \ sysctl.9 sysctl_msec_to_ticks.9 \ sysctl.9 SYSCTL_NODE.9 \ sysctl.9 SYSCTL_NODE_WITH_LABEL.9 \ sysctl.9 SYSCTL_OPAQUE.9 \ sysctl.9 SYSCTL_PROC.9 \ sysctl.9 SYSCTL_QUAD.9 \ sysctl.9 SYSCTL_ROOT_NODE.9 \ sysctl.9 SYSCTL_S8.9 \ sysctl.9 SYSCTL_S16.9 \ sysctl.9 SYSCTL_S32.9 \ sysctl.9 SYSCTL_S64.9 \ sysctl.9 SYSCTL_STRING.9 \ sysctl.9 SYSCTL_STRUCT.9 \ sysctl.9 SYSCTL_TIMEVAL_SEC.9 \ sysctl.9 SYSCTL_U8.9 \ sysctl.9 SYSCTL_U16.9 \ sysctl.9 SYSCTL_U32.9 \ sysctl.9 SYSCTL_U64.9 \ sysctl.9 SYSCTL_UINT.9 \ sysctl.9 SYSCTL_ULONG.9 \ sysctl.9 SYSCTL_UMA_CUR.9 \ sysctl.9 SYSCTL_UMA_MAX.9 \ sysctl.9 SYSCTL_UQUAD.9 MLINKS+=sysctl_add_oid.9 sysctl_move_oid.9 \ sysctl_add_oid.9 sysctl_remove_oid.9 \ sysctl_add_oid.9 sysctl_remove_name.9 MLINKS+=sysctl_ctx_init.9 sysctl_ctx_entry_add.9 \ sysctl_ctx_init.9 sysctl_ctx_entry_del.9 \ sysctl_ctx_init.9 sysctl_ctx_entry_find.9 \ sysctl_ctx_init.9 sysctl_ctx_free.9 MLINKS+=SYSINIT.9 SYSUNINIT.9 MLINKS+=taskqueue.9 TASK_INIT.9 \ taskqueue.9 TASK_INITIALIZER.9 \ taskqueue.9 taskqueue_block.9 \ taskqueue.9 taskqueue_cancel.9 \ taskqueue.9 taskqueue_cancel_timeout.9 \ taskqueue.9 taskqueue_create.9 \ taskqueue.9 taskqueue_create_fast.9 \ taskqueue.9 TASKQUEUE_DECLARE.9 \ taskqueue.9 TASKQUEUE_DEFINE.9 \ taskqueue.9 TASKQUEUE_DEFINE_THREAD.9 \ taskqueue.9 taskqueue_drain.9 \ taskqueue.9 taskqueue_drain_all.9 \ taskqueue.9 taskqueue_drain_timeout.9 \ taskqueue.9 taskqueue_enqueue.9 \ taskqueue.9 taskqueue_enqueue_timeout.9 \ taskqueue.9 TASKQUEUE_FAST_DEFINE.9 \ taskqueue.9 TASKQUEUE_FAST_DEFINE_THREAD.9 \ taskqueue.9 taskqueue_free.9 \ taskqueue.9 taskqueue_member.9 \ taskqueue.9 taskqueue_quiesce.9 \ taskqueue.9 taskqueue_run.9 \ taskqueue.9 taskqueue_set_callback.9 \ taskqueue.9 taskqueue_start_threads.9 \ taskqueue.9 taskqueue_start_threads_cpuset.9 \ taskqueue.9 taskqueue_start_threads_in_proc.9 \ taskqueue.9 taskqueue_unblock.9 \ taskqueue.9 TIMEOUT_TASK_INIT.9 MLINKS+=tcp_functions.9 register_tcp_functions.9 \ tcp_functions.9 register_tcp_functions_as_name.9 \ tcp_functions.9 register_tcp_functions_as_names.9 \ tcp_functions.9 deregister_tcp_functions.9 MLINKS+=time.9 boottime.9 \ time.9 time_second.9 \ time.9 time_uptime.9 MLINKS+=ucred.9 crcopy.9 \ ucred.9 crcopysafe.9 \ ucred.9 crdup.9 \ ucred.9 crfree.9 \ ucred.9 crget.9 \ ucred.9 crhold.9 \ ucred.9 crsetgroups.9 \ ucred.9 cru2x.9 MLINKS+=uidinfo.9 uifind.9 \ uidinfo.9 uifree.9 \ uidinfo.9 uihashinit.9 \ uidinfo.9 uihold.9 MLINKS+=uio.9 uiomove.9 \ uio.9 uiomove_frombuf.9 \ uio.9 uiomove_nofault.9 .if ${MK_USB} != "no" MAN+= usbdi.9 MLINKS+=usbdi.9 usbd_do_request.9 \ usbdi.9 usbd_do_request_flags.9 \ usbdi.9 usbd_errstr.9 \ usbdi.9 usbd_lookup_id_by_info.9 \ usbdi.9 usbd_lookup_id_by_uaa.9 \ usbdi.9 usbd_transfer_clear_stall.9 \ usbdi.9 usbd_transfer_drain.9 \ usbdi.9 usbd_transfer_pending.9 \ usbdi.9 usbd_transfer_poll.9 \ usbdi.9 usbd_transfer_setup.9 \ usbdi.9 usbd_transfer_start.9 \ usbdi.9 usbd_transfer_stop.9 \ usbdi.9 usbd_transfer_submit.9 \ usbdi.9 usbd_transfer_unsetup.9 \ usbdi.9 usbd_xfer_clr_flag.9 \ usbdi.9 usbd_xfer_frame_data.9 \ usbdi.9 usbd_xfer_frame_len.9 \ usbdi.9 usbd_xfer_get_frame.9 \ usbdi.9 usbd_xfer_get_priv.9 \ usbdi.9 usbd_xfer_is_stalled.9 \ usbdi.9 usbd_xfer_max_framelen.9 \ usbdi.9 usbd_xfer_max_frames.9 \ usbdi.9 usbd_xfer_max_len.9 \ usbdi.9 usbd_xfer_set_flag.9 \ usbdi.9 usbd_xfer_set_frame_data.9 \ usbdi.9 usbd_xfer_set_frame_len.9 \ usbdi.9 usbd_xfer_set_frame_offset.9 \ usbdi.9 usbd_xfer_set_frames.9 \ usbdi.9 usbd_xfer_set_interval.9 \ usbdi.9 usbd_xfer_set_priv.9 \ usbdi.9 usbd_xfer_set_stall.9 \ usbdi.9 usbd_xfer_set_timeout.9 \ usbdi.9 usbd_xfer_softc.9 \ usbdi.9 usbd_xfer_state.9 \ usbdi.9 usbd_xfer_status.9 \ usbdi.9 usb_fifo_alloc_buffer.9 \ usbdi.9 usb_fifo_attach.9 \ usbdi.9 usb_fifo_detach.9 \ usbdi.9 usb_fifo_free_buffer.9 \ usbdi.9 usb_fifo_get_data.9 \ usbdi.9 usb_fifo_get_data_buffer.9 \ usbdi.9 usb_fifo_get_data_error.9 \ usbdi.9 usb_fifo_get_data_linear.9 \ usbdi.9 usb_fifo_put_bytes_max.9 \ usbdi.9 usb_fifo_put_data.9 \ usbdi.9 usb_fifo_put_data_buffer.9 \ usbdi.9 usb_fifo_put_data_error.9 \ usbdi.9 usb_fifo_put_data_linear.9 \ usbdi.9 usb_fifo_reset.9 \ usbdi.9 usb_fifo_softc.9 \ usbdi.9 usb_fifo_wakeup.9 .endif MLINKS+=vcount.9 count_dev.9 MLINKS+=vfsconf.9 vfs_modevent.9 \ vfsconf.9 vfs_register.9 \ vfsconf.9 vfs_unregister.9 MLINKS+=vfs_getopt.9 vfs_copyopt.9 \ vfs_getopt.9 vfs_filteropt.9 \ vfs_getopt.9 vfs_flagopt.9 \ vfs_getopt.9 vfs_getopts.9 \ vfs_getopt.9 vfs_scanopt.9 \ vfs_getopt.9 vfs_setopt.9 \ vfs_getopt.9 vfs_setopt_part.9 \ vfs_getopt.9 vfs_setopts.9 MLINKS+=vhold.9 vdrop.9 \ vhold.9 vdropl.9 \ vhold.9 vholdl.9 MLINKS+=vmem.9 vmem_add.9 \ vmem.9 vmem_alloc.9 \ vmem.9 vmem_create.9 \ vmem.9 vmem_destroy.9 \ vmem.9 vmem_free.9 \ vmem.9 vmem_xalloc.9 \ vmem.9 vmem_xfree.9 MLINKS+=vm_map_lock.9 vm_map_lock_downgrade.9 \ vm_map_lock.9 vm_map_lock_read.9 \ vm_map_lock.9 vm_map_lock_upgrade.9 \ vm_map_lock.9 vm_map_trylock.9 \ vm_map_lock.9 vm_map_trylock_read.9 \ vm_map_lock.9 vm_map_unlock.9 \ vm_map_lock.9 vm_map_unlock_read.9 MLINKS+=vm_map_lookup.9 vm_map_lookup_done.9 MLINKS+=vm_map_max.9 vm_map_min.9 \ vm_map_max.9 vm_map_pmap.9 MLINKS+=vm_map_stack.9 vm_map_growstack.9 MLINKS+=vm_map_wire.9 vm_map_wire_mapped.9 \ vm_page_wire.9 vm_page_unwire.9 \ vm_page_wire.9 vm_page_unwire_noq.9 MLINKS+=vm_page_bits.9 vm_page_clear_dirty.9 \ vm_page_bits.9 vm_page_dirty.9 \ vm_page_bits.9 vm_page_is_valid.9 \ vm_page_bits.9 vm_page_set_invalid.9 \ vm_page_bits.9 vm_page_set_validclean.9 \ vm_page_bits.9 vm_page_test_dirty.9 \ vm_page_bits.9 vm_page_undirty.9 \ vm_page_bits.9 vm_page_zero_invalid.9 MLINKS+=vm_page_busy.9 vm_page_busied.9 \ vm_page_busy.9 vm_page_busy_downgrade.9 \ vm_page_busy.9 vm_page_busy_sleep.9 \ vm_page_busy.9 vm_page_sbusied.9 \ vm_page_busy.9 vm_page_sbusy.9 \ vm_page_busy.9 vm_page_sleep_if_busy.9 \ vm_page_busy.9 vm_page_sunbusy.9 \ vm_page_busy.9 vm_page_trysbusy.9 \ vm_page_busy.9 vm_page_tryxbusy.9 \ vm_page_busy.9 vm_page_xbusied.9 \ vm_page_busy.9 vm_page_xbusy.9 \ vm_page_busy.9 vm_page_xunbusy.9 \ vm_page_busy.9 vm_page_assert_sbusied.9 \ vm_page_busy.9 vm_page_assert_unbusied.9 \ vm_page_busy.9 vm_page_assert_xbusied.9 MLINKS+=vm_page_aflag.9 vm_page_aflag_clear.9 \ vm_page_aflag.9 vm_page_aflag_set.9 \ vm_page_aflag.9 vm_page_reference.9 MLINKS+=vm_page_free.9 vm_page_free_toq.9 \ vm_page_free.9 vm_page_free_zero.9 \ vm_page_free.9 vm_page_try_to_free.9 MLINKS+=vm_page_insert.9 vm_page_remove.9 MLINKS+=vm_page_wire.9 vm_page_unwire.9 MLINKS+=VOP_ACCESS.9 VOP_ACCESSX.9 MLINKS+=VOP_ATTRIB.9 VOP_GETATTR.9 \ - VOP_ATTRIB.9 VOP_SETATTR.9 + VOP_ATTRIB.9 VOP_SETATTR.9 \ + VOP_ATTRIB.9 VOP_STAT.9 MLINKS+=VOP_CREATE.9 VOP_MKDIR.9 \ VOP_CREATE.9 VOP_MKNOD.9 \ VOP_CREATE.9 VOP_SYMLINK.9 MLINKS+=VOP_FSYNC.9 VOP_FDATASYNC.9 MLINKS+=VOP_GETPAGES.9 VOP_PUTPAGES.9 MLINKS+=VOP_INACTIVE.9 VOP_RECLAIM.9 MLINKS+=VOP_LOCK.9 vn_lock.9 \ VOP_LOCK.9 VOP_ISLOCKED.9 \ VOP_LOCK.9 VOP_UNLOCK.9 MLINKS+=VOP_OPENCLOSE.9 VOP_CLOSE.9 \ VOP_OPENCLOSE.9 VOP_OPEN.9 MLINKS+=VOP_RDWR.9 VOP_READ.9 \ VOP_RDWR.9 VOP_WRITE.9 MLINKS+=VOP_REMOVE.9 VOP_RMDIR.9 MLINKS+=vnet.9 vimage.9 MLINKS+=vref.9 VREF.9 \ vref.9 vrefl.9 MLINKS+=vrele.9 vput.9 \ vrele.9 vunref.9 MLINKS+=vslock.9 vsunlock.9 MLINKS+=zone.9 uma.9 \ zone.9 uma_prealloc.9 \ zone.9 uma_reclaim.9 \ zone.9 uma_zalloc.9 \ zone.9 uma_zalloc_arg.9 \ zone.9 uma_zalloc_domain.9 \ zone.9 uma_zalloc_pcpu.9 \ zone.9 uma_zalloc_pcpu_arg.9 \ zone.9 uma_zcache_create.9 \ zone.9 uma_zcreate.9 \ zone.9 uma_zdestroy.9 \ zone.9 uma_zfree.9 \ zone.9 uma_zfree_arg.9 \ zone.9 uma_zfree_pcpu.9 \ zone.9 uma_zfree_pcpu_arg.9 \ zone.9 uma_zone_get_cur.9 \ zone.9 uma_zone_get_max.9 \ zone.9 uma_zone_reclaim.9 \ zone.9 uma_zone_reserve.9 \ zone.9 uma_zone_reserve_kva.9 \ zone.9 uma_zone_set_allocf.9 \ zone.9 uma_zone_set_freef.9 \ zone.9 uma_zone_set_max.9 \ zone.9 uma_zone_set_maxaction.9 \ zone.9 uma_zone_set_maxcache.9 \ zone.9 uma_zone_set_warning.9 \ zone.9 uma_zsecond_create.9 .if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386" _superio.9= superio.9 MLINKS+=superio.9 superio_devid.9 \ superio.9 superio_dev_disable.9 \ superio.9 superio_dev_enable.9 \ superio.9 superio_dev_enabled.9 \ superio.9 superio_find_dev.9 \ superio.9 superio_find_dev.9 \ superio.9 superio_get_dma.9 \ superio.9 superio_get_iobase.9 \ superio.9 superio_get_irq.9 \ superio.9 superio_get_ldn.9 \ superio.9 superio_get_type.9 \ superio.9 superio_read.9 \ superio.9 superio_revid.9 \ superio.9 superio_vendor.9 \ superio.9 superio_write.9 .endif .include diff --git a/share/man/man9/VOP_ATTRIB.9 b/share/man/man9/VOP_ATTRIB.9 index e48e4eb9a254..45f1e2f1652a 100644 --- a/share/man/man9/VOP_ATTRIB.9 +++ b/share/man/man9/VOP_ATTRIB.9 @@ -1,102 +1,139 @@ .\" -*- nroff -*- .\" .\" Copyright (c) 1996 Doug Rabson .\" .\" All rights reserved. .\" .\" This program is free software. .\" .\" 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 DEVELOPERS ``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 DEVELOPERS 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. .\" .\" $FreeBSD$ .\" -.Dd August 29, 2008 +.Dd August 8, 2020 .Dt VOP_ATTRIB 9 .Os .Sh NAME .Nm VOP_GETATTR , .Nm VOP_SETATTR .Nd get and set attributes on a file or directory .Sh SYNOPSIS .In sys/param.h .In sys/vnode.h .Ft int .Fn VOP_GETATTR "struct vnode *vp" "struct vattr *vap" "struct ucred *cred" .Ft int .Fn VOP_SETATTR "struct vnode *vp" "struct vattr *vap" "struct ucred *cred" +.Ft int +.Fn VOP_STAT "struct vnode *vp" "struct stat *sb" "struct ucred *active_cred" \ +"struct ucred *file_cred" "struct thread *td" .Sh DESCRIPTION These entry points manipulate various attributes of a file or directory, including file permissions, owner, group, size, access time and modification time. .Pp -The arguments are: +.Fn VOP_STAT +returns data in a format suitable for the +.Xr stat 2 +system call and by default is implemented as a wrapper around +.Fn VOP_GETATTR . +Filesystems may want to implement their own variant for performance reasons. +.Pp +For +.Fn VOP_GETATTR +and +.Fn VOP_SETATTR +the arguments are: .Bl -tag -width cred .It Fa vp The vnode of the file. .It Fa vap The attributes of the file. .It Fa cred -The user credentials of the calling process. +The user credentials of the calling thread. +.El +.Pp +For +.Fn VOP_STAT +the arguments are: +.Bl -tag -width active_cred +.It Fa vp +The vnode of the file. +.It Fa sb +The attributes of the file. +.It Fa active_cred +The user credentials of the calling thread. +.It Fa file_cred +The credentials installed on the file description pointing to the vnode or NOCRED. +.It Fa td +The calling thread. .El .Pp Attributes which are not being modified by .Fn VOP_SETATTR should be set to the value .Dv VNOVAL ; .Fn VATTR_NULL may be used to clear all the values, and should generally be used to reset the contents of .Fa *vap prior to setting specific values. .Sh LOCKS +Both .Fn VOP_GETATTR -expects the vnode to be locked on entry and will leave the vnode locked on +and +.Fn VOP_STAT +expect the vnode to be locked on entry and will leave the vnode locked on return. The lock type can be either shared or exclusive. .Pp .Fn VOP_SETATTR expects the vnode to be locked on entry and will leave the vnode locked on return. The lock type must be exclusive. .Sh RETURN VALUES .Fn VOP_GETATTR returns 0 if it was able to retrieve the attribute data via .Fa *vap , otherwise an appropriate error is returned. .Fn VOP_SETATTR returns zero if the attributes were changed successfully, otherwise an appropriate error is returned. +.Fn VOP_STAT +returns 0 if it was able to retrieve the attribute data +.Fa *sb , +otherwise an appropriate error is returned. .Sh ERRORS .Bl -tag -width Er .It Bq Er EPERM The file is immutable. .It Bq Er EACCES The caller does not have permission to modify the file or directory attributes. .It Bq Er EROFS The file system is read-only. .El .Sh SEE ALSO .Xr VFS 9 , .Xr vnode 9 , .Xr VOP_ACCESS 9 .Sh AUTHORS This manual page was written by .An Doug Rabson . diff --git a/sys/cam/mmc/mmc_da.c b/sys/cam/mmc/mmc_da.c index a603dabf9351..7d78685c81df 100644 --- a/sys/cam/mmc/mmc_da.c +++ b/sys/cam/mmc/mmc_da.c @@ -1,2023 +1,2023 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2006 Bernd Walter All rights reserved. * Copyright (c) 2009 Alexander Motin All rights reserved. * Copyright (c) 2015-2017 Ilya Bakulin All rights reserved. * Copyright (c) 2006 M. Warner Losh * * 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, * without modification, immediately at the beginning of the file. * 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 ``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 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. * * Some code derived from the sys/dev/mmc and sys/cam/ata * Thanks to Warner Losh , Alexander Motin * Bernd Walter , and other authors. */ #include __FBSDID("$FreeBSD$"); //#include "opt_sdda.h" #include #ifdef _KERNEL #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* for PRIu64 */ #endif /* _KERNEL */ #ifndef _KERNEL #include #include #endif /* _KERNEL */ #include #include #include #include #include #include #include #include #include #include #include #ifdef _KERNEL typedef enum { SDDA_FLAG_OPEN = 0x0002, SDDA_FLAG_DIRTY = 0x0004 } sdda_flags; typedef enum { SDDA_STATE_INIT, SDDA_STATE_INVALID, SDDA_STATE_NORMAL, SDDA_STATE_PART_SWITCH, } sdda_state; #define SDDA_FMT_BOOT "sdda%dboot" #define SDDA_FMT_GP "sdda%dgp" #define SDDA_FMT_RPMB "sdda%drpmb" #define SDDA_LABEL_ENH "enh" #define SDDA_PART_NAMELEN (16 + 1) struct sdda_softc; struct sdda_part { struct disk *disk; struct bio_queue_head bio_queue; sdda_flags flags; struct sdda_softc *sc; u_int cnt; u_int type; bool ro; char name[SDDA_PART_NAMELEN]; }; struct sdda_softc { int outstanding_cmds; /* Number of active commands */ int refcount; /* Active xpt_action() calls */ sdda_state state; struct mmc_data *mmcdata; struct cam_periph *periph; // sdda_quirks quirks; struct task start_init_task; uint32_t raw_csd[4]; uint8_t raw_ext_csd[512]; /* MMC only? */ struct mmc_csd csd; struct mmc_cid cid; struct mmc_scr scr; /* Calculated from CSD */ uint64_t sector_count; uint64_t mediasize; /* Calculated from CID */ char card_id_string[64];/* Formatted CID info (serial, MFG, etc) */ char card_sn_string[16];/* Formatted serial # for disk->d_ident */ /* Determined from CSD + is highspeed card*/ uint32_t card_f_max; /* Generic switch timeout */ uint32_t cmd6_time; uint32_t timings; /* Mask of bus timings supported */ uint32_t vccq_120; /* Mask of bus timings at VCCQ of 1.2 V */ uint32_t vccq_180; /* Mask of bus timings at VCCQ of 1.8 V */ /* MMC partitions support */ struct sdda_part *part[MMC_PART_MAX]; uint8_t part_curr; /* Partition currently switched to */ uint8_t part_requested; /* What partition we're currently switching to */ uint32_t part_time; /* Partition switch timeout [us] */ off_t enh_base; /* Enhanced user data area slice base ... */ off_t enh_size; /* ... and size [bytes] */ int log_count; struct timeval log_time; }; static const char *mmc_errmsg[] = { "None", "Timeout", "Bad CRC", "Fifo", "Failed", "Invalid", "NO MEMORY" }; #define ccb_bp ppriv_ptr1 static disk_strategy_t sddastrategy; static periph_init_t sddainit; static void sddaasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg); static periph_ctor_t sddaregister; static periph_dtor_t sddacleanup; static periph_start_t sddastart; static periph_oninv_t sddaoninvalidate; static void sddadone(struct cam_periph *periph, union ccb *done_ccb); static int sddaerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags); static int mmc_handle_reply(union ccb *ccb); static uint16_t get_rca(struct cam_periph *periph); static void sdda_start_init(void *context, union ccb *start_ccb); static void sdda_start_init_task(void *context, int pending); static void sdda_process_mmc_partitions(struct cam_periph *periph, union ccb *start_ccb); static uint32_t sdda_get_host_caps(struct cam_periph *periph, union ccb *ccb); static void sdda_init_switch_part(struct cam_periph *periph, union ccb *start_ccb, u_int part); static int mmc_select_card(struct cam_periph *periph, union ccb *ccb, uint32_t rca); static inline uint32_t mmc_get_sector_size(struct cam_periph *periph) {return MMC_SECTOR_SIZE;} static SYSCTL_NODE(_kern_cam, OID_AUTO, sdda, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "CAM Direct Access Disk driver"); static int sdda_mmcsd_compat = 1; SYSCTL_INT(_kern_cam_sdda, OID_AUTO, mmcsd_compat, CTLFLAG_RDTUN, &sdda_mmcsd_compat, 1, "Enable creation of mmcsd aliases."); /* TODO: actually issue GET_TRAN_SETTINGS to get R/O status */ static inline bool sdda_get_read_only(struct cam_periph *periph, union ccb *start_ccb) { return (false); } static uint32_t mmc_get_spec_vers(struct cam_periph *periph); static uint64_t mmc_get_media_size(struct cam_periph *periph); static uint32_t mmc_get_cmd6_timeout(struct cam_periph *periph); static void sdda_add_part(struct cam_periph *periph, u_int type, const char *name, u_int cnt, off_t media_size, bool ro); static struct periph_driver sddadriver = { sddainit, "sdda", TAILQ_HEAD_INITIALIZER(sddadriver.units), /* generation */ 0 }; PERIPHDRIVER_DECLARE(sdda, sddadriver); static MALLOC_DEFINE(M_SDDA, "sd_da", "sd_da buffers"); static const int exp[8] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 }; static const int mant[16] = { 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 }; static const int cur_min[8] = { 500, 1000, 5000, 10000, 25000, 35000, 60000, 100000 }; static const int cur_max[8] = { 1000, 5000, 10000, 25000, 35000, 45000, 800000, 200000 }; static uint16_t get_rca(struct cam_periph *periph) { return periph->path->device->mmc_ident_data.card_rca; } /* * Figure out if CCB execution resulted in error. * Look at both CAM-level errors and on MMC protocol errors. */ static int mmc_handle_reply(union ccb *ccb) { KASSERT(ccb->ccb_h.func_code == XPT_MMC_IO, ("ccb %p: cannot handle non-XPT_MMC_IO errors, got func_code=%d", ccb, ccb->ccb_h.func_code)); /* TODO: maybe put MMC-specific handling into cam.c/cam_error_print altogether */ if (((ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP)) { if (ccb->mmcio.cmd.error != 0) { xpt_print_path(ccb->ccb_h.path); printf("CMD%d failed, err %d (%s)\n", ccb->mmcio.cmd.opcode, ccb->mmcio.cmd.error, mmc_errmsg[ccb->mmcio.cmd.error]); return (EIO); } } else { cam_error_print(ccb, CAM_ESF_ALL, CAM_EPF_ALL); return (EIO); } return (0); /* Normal return */ } static uint32_t mmc_get_bits(uint32_t *bits, int bit_len, int start, int size) { const int i = (bit_len / 32) - (start / 32) - 1; const int shift = start & 31; uint32_t retval = bits[i] >> shift; if (size + shift > 32) retval |= bits[i - 1] << (32 - shift); return (retval & ((1llu << size) - 1)); } static void mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd) { int v; int m; int e; memset(csd, 0, sizeof(*csd)); csd->csd_structure = v = mmc_get_bits(raw_csd, 128, 126, 2); if (v == 0) { m = mmc_get_bits(raw_csd, 128, 115, 4); e = mmc_get_bits(raw_csd, 128, 112, 3); csd->tacc = (exp[e] * mant[m] + 9) / 10; csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; m = mmc_get_bits(raw_csd, 128, 99, 4); e = mmc_get_bits(raw_csd, 128, 96, 3); csd->tran_speed = exp[e] * 10000 * mant[m]; csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; m = mmc_get_bits(raw_csd, 128, 62, 12); e = mmc_get_bits(raw_csd, 128, 47, 3); csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); } else if (v == 1) { m = mmc_get_bits(raw_csd, 128, 115, 4); e = mmc_get_bits(raw_csd, 128, 112, 3); csd->tacc = (exp[e] * mant[m] + 9) / 10; csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; m = mmc_get_bits(raw_csd, 128, 99, 4); e = mmc_get_bits(raw_csd, 128, 96, 3); csd->tran_speed = exp[e] * 10000 * mant[m]; csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); csd->capacity = ((uint64_t)mmc_get_bits(raw_csd, 128, 48, 22) + 1) * 512 * 1024; csd->erase_blk_en = mmc_get_bits(raw_csd, 128, 46, 1); csd->erase_sector = mmc_get_bits(raw_csd, 128, 39, 7) + 1; csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 7); csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); } else panic("unknown SD CSD version"); } static void mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd) { int m; int e; memset(csd, 0, sizeof(*csd)); csd->csd_structure = mmc_get_bits(raw_csd, 128, 126, 2); csd->spec_vers = mmc_get_bits(raw_csd, 128, 122, 4); m = mmc_get_bits(raw_csd, 128, 115, 4); e = mmc_get_bits(raw_csd, 128, 112, 3); csd->tacc = exp[e] * mant[m] + 9 / 10; csd->nsac = mmc_get_bits(raw_csd, 128, 104, 8) * 100; m = mmc_get_bits(raw_csd, 128, 99, 4); e = mmc_get_bits(raw_csd, 128, 96, 3); csd->tran_speed = exp[e] * 10000 * mant[m]; csd->ccc = mmc_get_bits(raw_csd, 128, 84, 12); csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 128, 80, 4); csd->read_bl_partial = mmc_get_bits(raw_csd, 128, 79, 1); csd->write_blk_misalign = mmc_get_bits(raw_csd, 128, 78, 1); csd->read_blk_misalign = mmc_get_bits(raw_csd, 128, 77, 1); csd->dsr_imp = mmc_get_bits(raw_csd, 128, 76, 1); csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 59, 3)]; csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 56, 3)]; csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 128, 53, 3)]; csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 128, 50, 3)]; m = mmc_get_bits(raw_csd, 128, 62, 12); e = mmc_get_bits(raw_csd, 128, 47, 3); csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; csd->erase_blk_en = 0; csd->erase_sector = (mmc_get_bits(raw_csd, 128, 42, 5) + 1) * (mmc_get_bits(raw_csd, 128, 37, 5) + 1); csd->wp_grp_size = mmc_get_bits(raw_csd, 128, 32, 5); csd->wp_grp_enable = mmc_get_bits(raw_csd, 128, 31, 1); csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 128, 26, 3); csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 128, 22, 4); csd->write_bl_partial = mmc_get_bits(raw_csd, 128, 21, 1); } static void mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid) { int i; /* There's no version info, so we take it on faith */ memset(cid, 0, sizeof(*cid)); cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); cid->oid = mmc_get_bits(raw_cid, 128, 104, 16); for (i = 0; i < 5; i++) cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); cid->pnm[5] = 0; cid->prv = mmc_get_bits(raw_cid, 128, 56, 8); cid->psn = mmc_get_bits(raw_cid, 128, 24, 32); cid->mdt_year = mmc_get_bits(raw_cid, 128, 12, 8) + 2000; cid->mdt_month = mmc_get_bits(raw_cid, 128, 8, 4); } static void mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid) { int i; /* There's no version info, so we take it on faith */ memset(cid, 0, sizeof(*cid)); cid->mid = mmc_get_bits(raw_cid, 128, 120, 8); cid->oid = mmc_get_bits(raw_cid, 128, 104, 8); for (i = 0; i < 6; i++) cid->pnm[i] = mmc_get_bits(raw_cid, 128, 96 - i * 8, 8); cid->pnm[6] = 0; cid->prv = mmc_get_bits(raw_cid, 128, 48, 8); cid->psn = mmc_get_bits(raw_cid, 128, 16, 32); cid->mdt_month = mmc_get_bits(raw_cid, 128, 12, 4); cid->mdt_year = mmc_get_bits(raw_cid, 128, 8, 4) + 1997; } static void mmc_format_card_id_string(struct sdda_softc *sc, struct mmc_params *mmcp) { char oidstr[8]; uint8_t c1; uint8_t c2; /* * Format a card ID string for use by the mmcsd driver, it's what * appears between the <> in the following: * mmcsd0: 968MB at mmc0 * 22.5MHz/4bit/128-block * * Also format just the card serial number, which the mmcsd driver will * use as the disk->d_ident string. * * The card_id_string in mmc_ivars is currently allocated as 64 bytes, * and our max formatted length is currently 55 bytes if every field * contains the largest value. * * Sometimes the oid is two printable ascii chars; when it's not, * format it as 0xnnnn instead. */ c1 = (sc->cid.oid >> 8) & 0x0ff; c2 = sc->cid.oid & 0x0ff; if (c1 > 0x1f && c1 < 0x7f && c2 > 0x1f && c2 < 0x7f) snprintf(oidstr, sizeof(oidstr), "%c%c", c1, c2); else snprintf(oidstr, sizeof(oidstr), "0x%04x", sc->cid.oid); snprintf(sc->card_sn_string, sizeof(sc->card_sn_string), "%08X", sc->cid.psn); snprintf(sc->card_id_string, sizeof(sc->card_id_string), "%s%s %s %d.%d SN %08X MFG %02d/%04d by %d %s", mmcp->card_features & CARD_FEATURE_MMC ? "MMC" : "SD", mmcp->card_features & CARD_FEATURE_SDHC ? "HC" : "", sc->cid.pnm, sc->cid.prv >> 4, sc->cid.prv & 0x0f, sc->cid.psn, sc->cid.mdt_month, sc->cid.mdt_year, sc->cid.mid, oidstr); } static int sddaopen(struct disk *dp) { struct sdda_part *part; struct cam_periph *periph; struct sdda_softc *softc; int error; part = (struct sdda_part *)dp->d_drv1; softc = part->sc; periph = softc->periph; if (cam_periph_acquire(periph) != 0) { return(ENXIO); } cam_periph_lock(periph); if ((error = cam_periph_hold(periph, PRIBIO|PCATCH)) != 0) { cam_periph_unlock(periph); cam_periph_release(periph); return (error); } CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sddaopen\n")); part->flags |= SDDA_FLAG_OPEN; cam_periph_unhold(periph); cam_periph_unlock(periph); return (0); } static int sddaclose(struct disk *dp) { struct sdda_part *part; struct cam_periph *periph; struct sdda_softc *softc; part = (struct sdda_part *)dp->d_drv1; softc = part->sc; periph = softc->periph; part->flags &= ~SDDA_FLAG_OPEN; cam_periph_lock(periph); CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sddaclose\n")); while (softc->refcount != 0) cam_periph_sleep(periph, &softc->refcount, PRIBIO, "sddaclose", 1); cam_periph_unlock(periph); cam_periph_release(periph); return (0); } static void sddaschedule(struct cam_periph *periph) { struct sdda_softc *softc = (struct sdda_softc *)periph->softc; struct sdda_part *part; struct bio *bp; int i; /* Check if we have more work to do. */ /* Find partition that has outstanding commands. Prefer current partition. */ bp = bioq_first(&softc->part[softc->part_curr]->bio_queue); if (bp == NULL) { for (i = 0; i < MMC_PART_MAX; i++) { if ((part = softc->part[i]) != NULL && (bp = bioq_first(&softc->part[i]->bio_queue)) != NULL) break; } } if (bp != NULL) { xpt_schedule(periph, CAM_PRIORITY_NORMAL); } } /* * Actually translate the requested transfer into one the physical driver * can understand. The transfer is described by a buf and will include * only one physical transfer. */ static void sddastrategy(struct bio *bp) { struct cam_periph *periph; struct sdda_part *part; struct sdda_softc *softc; part = (struct sdda_part *)bp->bio_disk->d_drv1; softc = part->sc; periph = softc->periph; cam_periph_lock(periph); CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sddastrategy(%p)\n", bp)); /* * If the device has been made invalid, error out */ if ((periph->flags & CAM_PERIPH_INVALID) != 0) { cam_periph_unlock(periph); biofinish(bp, NULL, ENXIO); return; } /* * Place it in the queue of disk activities for this disk */ bioq_disksort(&part->bio_queue, bp); /* * Schedule ourselves for performing the work. */ sddaschedule(periph); cam_periph_unlock(periph); return; } static void sddainit(void) { cam_status status; /* * Install a global async callback. This callback will * receive async callbacks like "new device found". */ status = xpt_register_async(AC_FOUND_DEVICE, sddaasync, NULL, NULL); if (status != CAM_REQ_CMP) { printf("sdda: Failed to attach master async callback " "due to status 0x%x!\n", status); } } /* * Callback from GEOM, called when it has finished cleaning up its * resources. */ static void sddadiskgonecb(struct disk *dp) { struct cam_periph *periph; struct sdda_part *part; part = (struct sdda_part *)dp->d_drv1; periph = part->sc->periph; CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sddadiskgonecb\n")); cam_periph_release(periph); } static void sddaoninvalidate(struct cam_periph *periph) { struct sdda_softc *softc; struct sdda_part *part; softc = (struct sdda_softc *)periph->softc; CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sddaoninvalidate\n")); /* * De-register any async callbacks. */ xpt_register_async(0, sddaasync, periph, periph->path); /* * Return all queued I/O with ENXIO. * XXX Handle any transactions queued to the card * with XPT_ABORT_CCB. */ CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("bioq_flush start\n")); for (int i = 0; i < MMC_PART_MAX; i++) { if ((part = softc->part[i]) != NULL) { bioq_flush(&part->bio_queue, NULL, ENXIO); disk_gone(part->disk); } } CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("bioq_flush end\n")); } static void sddacleanup(struct cam_periph *periph) { struct sdda_softc *softc; struct sdda_part *part; int i; CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sddacleanup\n")); softc = (struct sdda_softc *)periph->softc; cam_periph_unlock(periph); for (i = 0; i < MMC_PART_MAX; i++) { if ((part = softc->part[i]) != NULL) { disk_destroy(part->disk); free(part, M_DEVBUF); softc->part[i] = NULL; } } free(softc, M_DEVBUF); cam_periph_lock(periph); } static void sddaasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg) { struct ccb_getdev cgd; struct cam_periph *periph; struct sdda_softc *softc; periph = (struct cam_periph *)callback_arg; CAM_DEBUG(path, CAM_DEBUG_TRACE, ("sddaasync(code=%d)\n", code)); switch (code) { case AC_FOUND_DEVICE: { CAM_DEBUG(path, CAM_DEBUG_TRACE, ("=> AC_FOUND_DEVICE\n")); struct ccb_getdev *cgd; cam_status status; cgd = (struct ccb_getdev *)arg; if (cgd == NULL) break; if (cgd->protocol != PROTO_MMCSD) break; if (!(path->device->mmc_ident_data.card_features & CARD_FEATURE_MEMORY)) { CAM_DEBUG(path, CAM_DEBUG_TRACE, ("No memory on the card!\n")); break; } /* * Allocate a peripheral instance for * this device and start the probe * process. */ status = cam_periph_alloc(sddaregister, sddaoninvalidate, sddacleanup, sddastart, "sdda", CAM_PERIPH_BIO, path, sddaasync, AC_FOUND_DEVICE, cgd); if (status != CAM_REQ_CMP && status != CAM_REQ_INPROG) printf("sddaasync: Unable to attach to new device " "due to status 0x%x\n", status); break; } case AC_GETDEV_CHANGED: { CAM_DEBUG(path, CAM_DEBUG_TRACE, ("=> AC_GETDEV_CHANGED\n")); softc = (struct sdda_softc *)periph->softc; xpt_setup_ccb(&cgd.ccb_h, periph->path, CAM_PRIORITY_NORMAL); cgd.ccb_h.func_code = XPT_GDEV_TYPE; xpt_action((union ccb *)&cgd); cam_periph_async(periph, code, path, arg); break; } case AC_ADVINFO_CHANGED: { uintptr_t buftype; int i; CAM_DEBUG(path, CAM_DEBUG_TRACE, ("=> AC_ADVINFO_CHANGED\n")); buftype = (uintptr_t)arg; if (buftype == CDAI_TYPE_PHYS_PATH) { struct sdda_softc *softc; struct sdda_part *part; softc = periph->softc; for (i = 0; i < MMC_PART_MAX; i++) { if ((part = softc->part[i]) != NULL) { disk_attr_changed(part->disk, "GEOM::physpath", M_NOWAIT); } } } break; } default: CAM_DEBUG(path, CAM_DEBUG_TRACE, ("=> default?!\n")); cam_periph_async(periph, code, path, arg); break; } } static int sddagetattr(struct bio *bp) { struct cam_periph *periph; struct sdda_softc *softc; struct sdda_part *part; int ret; part = (struct sdda_part *)bp->bio_disk->d_drv1; softc = part->sc; periph = softc->periph; cam_periph_lock(periph); ret = xpt_getattr(bp->bio_data, bp->bio_length, bp->bio_attribute, periph->path); cam_periph_unlock(periph); if (ret == 0) bp->bio_completed = bp->bio_length; return (ret); } static cam_status sddaregister(struct cam_periph *periph, void *arg) { struct sdda_softc *softc; struct ccb_getdev *cgd; union ccb *request_ccb; /* CCB representing the probe request */ CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sddaregister\n")); cgd = (struct ccb_getdev *)arg; if (cgd == NULL) { printf("sddaregister: no getdev CCB, can't register device\n"); return (CAM_REQ_CMP_ERR); } softc = (struct sdda_softc *)malloc(sizeof(*softc), M_DEVBUF, M_NOWAIT|M_ZERO); - if (softc == NULL) { printf("sddaregister: Unable to probe new device. " "Unable to allocate softc\n"); return (CAM_REQ_CMP_ERR); } softc->state = SDDA_STATE_INIT; softc->mmcdata = (struct mmc_data *)malloc(sizeof(struct mmc_data), M_DEVBUF, M_NOWAIT|M_ZERO); if (softc->mmcdata == NULL) { printf("sddaregister: Unable to probe new device. " "Unable to allocate mmcdata\n"); + free(softc, M_DEVBUF); return (CAM_REQ_CMP_ERR); } periph->softc = softc; softc->periph = periph; request_ccb = (union ccb*) arg; xpt_schedule(periph, CAM_PRIORITY_XPT); TASK_INIT(&softc->start_init_task, 0, sdda_start_init_task, periph); taskqueue_enqueue(taskqueue_thread, &softc->start_init_task); return (CAM_REQ_CMP); } static int mmc_exec_app_cmd(struct cam_periph *periph, union ccb *ccb, struct mmc_command *cmd) { int err; /* Send APP_CMD first */ memset(&ccb->mmcio.cmd, 0, sizeof(struct mmc_command)); memset(&ccb->mmcio.stop, 0, sizeof(struct mmc_command)); cam_fill_mmcio(&ccb->mmcio, /*retries*/ 0, /*cbfcnp*/ NULL, /*flags*/ CAM_DIR_NONE, /*mmc_opcode*/ MMC_APP_CMD, /*mmc_arg*/ get_rca(periph) << 16, /*mmc_flags*/ MMC_RSP_R1 | MMC_CMD_AC, /*mmc_data*/ NULL, /*timeout*/ 0); cam_periph_runccb(ccb, sddaerror, CAM_FLAG_NONE, /*sense_flags*/0, NULL); err = mmc_handle_reply(ccb); if (err != 0) return (err); if (!(ccb->mmcio.cmd.resp[0] & R1_APP_CMD)) return (EIO); /* Now exec actual command */ int flags = 0; if (cmd->data != NULL) { ccb->mmcio.cmd.data = cmd->data; if (cmd->data->flags & MMC_DATA_READ) flags |= CAM_DIR_IN; if (cmd->data->flags & MMC_DATA_WRITE) flags |= CAM_DIR_OUT; } else flags = CAM_DIR_NONE; cam_fill_mmcio(&ccb->mmcio, /*retries*/ 0, /*cbfcnp*/ NULL, /*flags*/ flags, /*mmc_opcode*/ cmd->opcode, /*mmc_arg*/ cmd->arg, /*mmc_flags*/ cmd->flags, /*mmc_data*/ cmd->data, /*timeout*/ 0); cam_periph_runccb(ccb, sddaerror, CAM_FLAG_NONE, /*sense_flags*/0, NULL); err = mmc_handle_reply(ccb); if (err != 0) return (err); memcpy(cmd->resp, ccb->mmcio.cmd.resp, sizeof(cmd->resp)); cmd->error = ccb->mmcio.cmd.error; return (0); } static int mmc_app_get_scr(struct cam_periph *periph, union ccb *ccb, uint32_t *rawscr) { int err; struct mmc_command cmd; struct mmc_data d; memset(&cmd, 0, sizeof(cmd)); memset(&d, 0, sizeof(d)); memset(rawscr, 0, 8); cmd.opcode = ACMD_SEND_SCR; cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; cmd.arg = 0; d.data = rawscr; d.len = 8; d.flags = MMC_DATA_READ; cmd.data = &d; err = mmc_exec_app_cmd(periph, ccb, &cmd); rawscr[0] = be32toh(rawscr[0]); rawscr[1] = be32toh(rawscr[1]); return (err); } static int mmc_send_ext_csd(struct cam_periph *periph, union ccb *ccb, uint8_t *rawextcsd, size_t buf_len) { int err; struct mmc_data d; KASSERT(buf_len == 512, ("Buffer for ext csd must be 512 bytes")); memset(&d, 0, sizeof(d)); d.data = rawextcsd; d.len = buf_len; d.flags = MMC_DATA_READ; memset(d.data, 0, d.len); cam_fill_mmcio(&ccb->mmcio, /*retries*/ 0, /*cbfcnp*/ NULL, /*flags*/ CAM_DIR_IN, /*mmc_opcode*/ MMC_SEND_EXT_CSD, /*mmc_arg*/ 0, /*mmc_flags*/ MMC_RSP_R1 | MMC_CMD_ADTC, /*mmc_data*/ &d, /*timeout*/ 0); cam_periph_runccb(ccb, sddaerror, CAM_FLAG_NONE, /*sense_flags*/0, NULL); err = mmc_handle_reply(ccb); return (err); } static void mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr) { unsigned int scr_struct; memset(scr, 0, sizeof(*scr)); scr_struct = mmc_get_bits(raw_scr, 64, 60, 4); if (scr_struct != 0) { printf("Unrecognised SCR structure version %d\n", scr_struct); return; } scr->sda_vsn = mmc_get_bits(raw_scr, 64, 56, 4); scr->bus_widths = mmc_get_bits(raw_scr, 64, 48, 4); } static inline void mmc_switch_fill_mmcio(union ccb *ccb, uint8_t set, uint8_t index, uint8_t value, u_int timeout) { int arg = (MMC_SWITCH_FUNC_WR << 24) | (index << 16) | (value << 8) | set; cam_fill_mmcio(&ccb->mmcio, /*retries*/ 0, /*cbfcnp*/ NULL, /*flags*/ CAM_DIR_NONE, /*mmc_opcode*/ MMC_SWITCH_FUNC, /*mmc_arg*/ arg, /*mmc_flags*/ MMC_RSP_R1B | MMC_CMD_AC, /*mmc_data*/ NULL, /*timeout*/ timeout); } static int mmc_select_card(struct cam_periph *periph, union ccb *ccb, uint32_t rca) { int flags, err; flags = (rca ? MMC_RSP_R1B : MMC_RSP_NONE) | MMC_CMD_AC; cam_fill_mmcio(&ccb->mmcio, /*retries*/ 0, /*cbfcnp*/ NULL, /*flags*/ CAM_DIR_IN, /*mmc_opcode*/ MMC_SELECT_CARD, /*mmc_arg*/ rca << 16, /*mmc_flags*/ flags, /*mmc_data*/ NULL, /*timeout*/ 0); cam_periph_runccb(ccb, sddaerror, CAM_FLAG_NONE, /*sense_flags*/0, NULL); err = mmc_handle_reply(ccb); return (err); } static int mmc_switch(struct cam_periph *periph, union ccb *ccb, uint8_t set, uint8_t index, uint8_t value, u_int timeout) { int err; mmc_switch_fill_mmcio(ccb, set, index, value, timeout); cam_periph_runccb(ccb, sddaerror, CAM_FLAG_NONE, /*sense_flags*/0, NULL); err = mmc_handle_reply(ccb); return (err); } static uint32_t mmc_get_spec_vers(struct cam_periph *periph) { struct sdda_softc *softc = (struct sdda_softc *)periph->softc; return (softc->csd.spec_vers); } static uint64_t mmc_get_media_size(struct cam_periph *periph) { struct sdda_softc *softc = (struct sdda_softc *)periph->softc; return (softc->mediasize); } static uint32_t mmc_get_cmd6_timeout(struct cam_periph *periph) { struct sdda_softc *softc = (struct sdda_softc *)periph->softc; if (mmc_get_spec_vers(periph) >= 6) return (softc->raw_ext_csd[EXT_CSD_GEN_CMD6_TIME] * 10); return (500 * 1000); } static int mmc_sd_switch(struct cam_periph *periph, union ccb *ccb, uint8_t mode, uint8_t grp, uint8_t value, uint8_t *res) { struct mmc_data mmc_d; uint32_t arg; int err; memset(res, 0, 64); memset(&mmc_d, 0, sizeof(mmc_d)); mmc_d.len = 64; mmc_d.data = res; mmc_d.flags = MMC_DATA_READ; arg = mode << 31; /* 0 - check, 1 - set */ arg |= 0x00FFFFFF; arg &= ~(0xF << (grp * 4)); arg |= value << (grp * 4); cam_fill_mmcio(&ccb->mmcio, /*retries*/ 0, /*cbfcnp*/ NULL, /*flags*/ CAM_DIR_IN, /*mmc_opcode*/ SD_SWITCH_FUNC, /*mmc_arg*/ arg, /*mmc_flags*/ MMC_RSP_R1 | MMC_CMD_ADTC, /*mmc_data*/ &mmc_d, /*timeout*/ 0); cam_periph_runccb(ccb, sddaerror, CAM_FLAG_NONE, /*sense_flags*/0, NULL); err = mmc_handle_reply(ccb); return (err); } static int mmc_set_timing(struct cam_periph *periph, union ccb *ccb, enum mmc_bus_timing timing) { u_char switch_res[64]; int err; uint8_t value; struct sdda_softc *softc = (struct sdda_softc *)periph->softc; struct mmc_params *mmcp = &periph->path->device->mmc_ident_data; CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("mmc_set_timing(timing=%d)", timing)); switch (timing) { case bus_timing_normal: value = 0; break; case bus_timing_hs: value = 1; break; default: return (MMC_ERR_INVALID); } if (mmcp->card_features & CARD_FEATURE_MMC) { err = mmc_switch(periph, ccb, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, value, softc->cmd6_time); } else { err = mmc_sd_switch(periph, ccb, SD_SWITCH_MODE_SET, SD_SWITCH_GROUP1, value, switch_res); } /* Set high-speed timing on the host */ struct ccb_trans_settings_mmc *cts; cts = &ccb->cts.proto_specific.mmc; ccb->ccb_h.func_code = XPT_SET_TRAN_SETTINGS; ccb->ccb_h.flags = CAM_DIR_NONE; ccb->ccb_h.retry_count = 0; ccb->ccb_h.timeout = 100; ccb->ccb_h.cbfcnp = NULL; cts->ios.timing = timing; cts->ios_valid = MMC_BT; xpt_action(ccb); return (err); } static void sdda_start_init_task(void *context, int pending) { union ccb *new_ccb; struct cam_periph *periph; periph = (struct cam_periph *)context; CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sdda_start_init_task\n")); new_ccb = xpt_alloc_ccb(); xpt_setup_ccb(&new_ccb->ccb_h, periph->path, CAM_PRIORITY_NONE); cam_periph_lock(periph); cam_periph_hold(periph, PRIBIO|PCATCH); sdda_start_init(context, new_ccb); cam_periph_unhold(periph); cam_periph_unlock(periph); xpt_free_ccb(new_ccb); } static void sdda_set_bus_width(struct cam_periph *periph, union ccb *ccb, int width) { struct sdda_softc *softc = (struct sdda_softc *)periph->softc; struct mmc_params *mmcp = &periph->path->device->mmc_ident_data; int err; CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sdda_set_bus_width\n")); /* First set for the card, then for the host */ if (mmcp->card_features & CARD_FEATURE_MMC) { uint8_t value; switch (width) { case bus_width_1: value = EXT_CSD_BUS_WIDTH_1; break; case bus_width_4: value = EXT_CSD_BUS_WIDTH_4; break; case bus_width_8: value = EXT_CSD_BUS_WIDTH_8; break; default: panic("Invalid bus width %d", width); } err = mmc_switch(periph, ccb, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, value, softc->cmd6_time); } else { /* For SD cards we send ACMD6 with the required bus width in arg */ struct mmc_command cmd; memset(&cmd, 0, sizeof(struct mmc_command)); cmd.opcode = ACMD_SET_BUS_WIDTH; cmd.arg = width; cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; err = mmc_exec_app_cmd(periph, ccb, &cmd); } if (err != MMC_ERR_NONE) { CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Error %d when setting bus width on the card\n", err)); return; } /* Now card is done, set the host to the same width */ struct ccb_trans_settings_mmc *cts; cts = &ccb->cts.proto_specific.mmc; ccb->ccb_h.func_code = XPT_SET_TRAN_SETTINGS; ccb->ccb_h.flags = CAM_DIR_NONE; ccb->ccb_h.retry_count = 0; ccb->ccb_h.timeout = 100; ccb->ccb_h.cbfcnp = NULL; cts->ios.bus_width = width; cts->ios_valid = MMC_BW; xpt_action(ccb); } static inline const char *part_type(u_int type) { switch (type) { case EXT_CSD_PART_CONFIG_ACC_RPMB: return ("RPMB"); case EXT_CSD_PART_CONFIG_ACC_DEFAULT: return ("default"); case EXT_CSD_PART_CONFIG_ACC_BOOT0: return ("boot0"); case EXT_CSD_PART_CONFIG_ACC_BOOT1: return ("boot1"); case EXT_CSD_PART_CONFIG_ACC_GP0: case EXT_CSD_PART_CONFIG_ACC_GP1: case EXT_CSD_PART_CONFIG_ACC_GP2: case EXT_CSD_PART_CONFIG_ACC_GP3: return ("general purpose"); default: return ("(unknown type)"); } } static inline const char *bus_width_str(enum mmc_bus_width w) { switch (w) { case bus_width_1: return ("1-bit"); case bus_width_4: return ("4-bit"); case bus_width_8: return ("8-bit"); } } static uint32_t sdda_get_host_caps(struct cam_periph *periph, union ccb *ccb) { struct ccb_trans_settings_mmc *cts; cts = &ccb->cts.proto_specific.mmc; ccb->ccb_h.func_code = XPT_GET_TRAN_SETTINGS; ccb->ccb_h.flags = CAM_DIR_NONE; ccb->ccb_h.retry_count = 0; ccb->ccb_h.timeout = 100; ccb->ccb_h.cbfcnp = NULL; xpt_action(ccb); if (ccb->ccb_h.status != CAM_REQ_CMP) panic("Cannot get host caps"); return (cts->host_caps); } static uint32_t sdda_get_max_data(struct cam_periph *periph, union ccb *ccb) { struct ccb_trans_settings_mmc *cts; cts = &ccb->cts.proto_specific.mmc; memset(cts, 0, sizeof(struct ccb_trans_settings_mmc)); ccb->ccb_h.func_code = XPT_GET_TRAN_SETTINGS; ccb->ccb_h.flags = CAM_DIR_NONE; ccb->ccb_h.retry_count = 0; ccb->ccb_h.timeout = 100; ccb->ccb_h.cbfcnp = NULL; xpt_action(ccb); if (ccb->ccb_h.status != CAM_REQ_CMP) panic("Cannot get host max data"); KASSERT(cts->host_max_data != 0, ("host_max_data == 0?!")); return (cts->host_max_data); } static void sdda_start_init(void *context, union ccb *start_ccb) { struct cam_periph *periph = (struct cam_periph *)context; struct ccb_trans_settings_mmc *cts; uint32_t host_caps; uint32_t sec_count; int err; int host_f_max; uint8_t card_type; CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sdda_start_init\n")); /* periph was held for us when this task was enqueued */ if ((periph->flags & CAM_PERIPH_INVALID) != 0) { cam_periph_release(periph); return; } struct sdda_softc *softc = (struct sdda_softc *)periph->softc; //struct ccb_mmcio *mmcio = &start_ccb->mmcio; struct mmc_params *mmcp = &periph->path->device->mmc_ident_data; struct cam_ed *device = periph->path->device; if (mmcp->card_features & CARD_FEATURE_MMC) { mmc_decode_csd_mmc(mmcp->card_csd, &softc->csd); mmc_decode_cid_mmc(mmcp->card_cid, &softc->cid); if (mmc_get_spec_vers(periph) >= 4) { err = mmc_send_ext_csd(periph, start_ccb, (uint8_t *)&softc->raw_ext_csd, sizeof(softc->raw_ext_csd)); if (err != 0) { CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Cannot read EXT_CSD, err %d", err)); return; } } } else { mmc_decode_csd_sd(mmcp->card_csd, &softc->csd); mmc_decode_cid_sd(mmcp->card_cid, &softc->cid); } softc->sector_count = softc->csd.capacity / 512; softc->mediasize = softc->csd.capacity; softc->cmd6_time = mmc_get_cmd6_timeout(periph); /* MMC >= 4.x have EXT_CSD that has its own opinion about capacity */ if (mmc_get_spec_vers(periph) >= 4) { sec_count = softc->raw_ext_csd[EXT_CSD_SEC_CNT] + (softc->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) + (softc->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) + (softc->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24); if (sec_count != 0) { softc->sector_count = sec_count; softc->mediasize = softc->sector_count * 512; /* FIXME: there should be a better name for this option...*/ mmcp->card_features |= CARD_FEATURE_SDHC; } } CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Capacity: %"PRIu64", sectors: %"PRIu64"\n", softc->mediasize, softc->sector_count)); mmc_format_card_id_string(softc, mmcp); /* Update info for CAM */ device->serial_num_len = strlen(softc->card_sn_string); device->serial_num = (u_int8_t *)malloc((device->serial_num_len + 1), M_CAMXPT, M_NOWAIT); strlcpy(device->serial_num, softc->card_sn_string, device->serial_num_len); device->device_id_len = strlen(softc->card_id_string); device->device_id = (u_int8_t *)malloc((device->device_id_len + 1), M_CAMXPT, M_NOWAIT); strlcpy(device->device_id, softc->card_id_string, device->device_id_len); strlcpy(mmcp->model, softc->card_id_string, sizeof(mmcp->model)); /* Set the clock frequency that the card can handle */ cts = &start_ccb->cts.proto_specific.mmc; /* First, get the host's max freq */ start_ccb->ccb_h.func_code = XPT_GET_TRAN_SETTINGS; start_ccb->ccb_h.flags = CAM_DIR_NONE; start_ccb->ccb_h.retry_count = 0; start_ccb->ccb_h.timeout = 100; start_ccb->ccb_h.cbfcnp = NULL; xpt_action(start_ccb); if (start_ccb->ccb_h.status != CAM_REQ_CMP) panic("Cannot get max host freq"); host_f_max = cts->host_f_max; host_caps = cts->host_caps; if (cts->ios.bus_width != bus_width_1) panic("Bus width in ios is not 1-bit"); /* Now check if the card supports High-speed */ softc->card_f_max = softc->csd.tran_speed; if (host_caps & MMC_CAP_HSPEED) { /* Find out if the card supports High speed timing */ if (mmcp->card_features & CARD_FEATURE_SD20) { /* Get and decode SCR */ uint32_t rawscr[2]; uint8_t res[64]; if (mmc_app_get_scr(periph, start_ccb, rawscr)) { CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Cannot get SCR\n")); goto finish_hs_tests; } mmc_app_decode_scr(rawscr, &softc->scr); if ((softc->scr.sda_vsn >= 1) && (softc->csd.ccc & (1<<10))) { mmc_sd_switch(periph, start_ccb, SD_SWITCH_MODE_CHECK, SD_SWITCH_GROUP1, SD_SWITCH_NOCHANGE, res); if (res[13] & 2) { CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Card supports HS\n")); softc->card_f_max = SD_HS_MAX; } /* * We deselect then reselect the card here. Some cards * become unselected and timeout with the above two * commands, although the state tables / diagrams in the * standard suggest they go back to the transfer state. * Other cards don't become deselected, and if we * attempt to blindly re-select them, we get timeout * errors from some controllers. So we deselect then * reselect to handle all situations. */ mmc_select_card(periph, start_ccb, 0); mmc_select_card(periph, start_ccb, get_rca(periph)); } else { CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Not trying the switch\n")); goto finish_hs_tests; } } if (mmcp->card_features & CARD_FEATURE_MMC && mmc_get_spec_vers(periph) >= 4) { card_type = softc->raw_ext_csd[EXT_CSD_CARD_TYPE]; if (card_type & EXT_CSD_CARD_TYPE_HS_52) softc->card_f_max = MMC_TYPE_HS_52_MAX; else if (card_type & EXT_CSD_CARD_TYPE_HS_26) softc->card_f_max = MMC_TYPE_HS_26_MAX; if ((card_type & EXT_CSD_CARD_TYPE_DDR_52_1_2V) != 0 && (host_caps & MMC_CAP_SIGNALING_120) != 0) { setbit(&softc->timings, bus_timing_mmc_ddr52); setbit(&softc->vccq_120, bus_timing_mmc_ddr52); CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Card supports DDR52 at 1.2V\n")); } if ((card_type & EXT_CSD_CARD_TYPE_DDR_52_1_8V) != 0 && (host_caps & MMC_CAP_SIGNALING_180) != 0) { setbit(&softc->timings, bus_timing_mmc_ddr52); setbit(&softc->vccq_180, bus_timing_mmc_ddr52); CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Card supports DDR52 at 1.8V\n")); } if ((card_type & EXT_CSD_CARD_TYPE_HS200_1_2V) != 0 && (host_caps & MMC_CAP_SIGNALING_120) != 0) { setbit(&softc->timings, bus_timing_mmc_hs200); setbit(&softc->vccq_120, bus_timing_mmc_hs200); CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Card supports HS200 at 1.2V\n")); } if ((card_type & EXT_CSD_CARD_TYPE_HS200_1_8V) != 0 && (host_caps & MMC_CAP_SIGNALING_180) != 0) { setbit(&softc->timings, bus_timing_mmc_hs200); setbit(&softc->vccq_180, bus_timing_mmc_hs200); CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Card supports HS200 at 1.8V\n")); } } } int f_max; finish_hs_tests: f_max = min(host_f_max, softc->card_f_max); CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Set SD freq to %d MHz (min out of host f=%d MHz and card f=%d MHz)\n", f_max / 1000000, host_f_max / 1000000, softc->card_f_max / 1000000)); /* Enable high-speed timing on the card */ if (f_max > 25000000) { err = mmc_set_timing(periph, start_ccb, bus_timing_hs); if (err != MMC_ERR_NONE) { CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("Cannot switch card to high-speed mode")); f_max = 25000000; } } /* If possible, set lower-level signaling */ enum mmc_bus_timing timing; /* FIXME: MMCCAM supports max. bus_timing_mmc_ddr52 at the moment. */ for (timing = bus_timing_mmc_ddr52; timing > bus_timing_normal; timing--) { if (isset(&softc->vccq_120, timing)) { /* Set VCCQ = 1.2V */ start_ccb->ccb_h.func_code = XPT_SET_TRAN_SETTINGS; start_ccb->ccb_h.flags = CAM_DIR_NONE; start_ccb->ccb_h.retry_count = 0; start_ccb->ccb_h.timeout = 100; start_ccb->ccb_h.cbfcnp = NULL; cts->ios.vccq = vccq_120; cts->ios_valid = MMC_VCCQ; xpt_action(start_ccb); break; } else if (isset(&softc->vccq_180, timing)) { /* Set VCCQ = 1.8V */ start_ccb->ccb_h.func_code = XPT_SET_TRAN_SETTINGS; start_ccb->ccb_h.flags = CAM_DIR_NONE; start_ccb->ccb_h.retry_count = 0; start_ccb->ccb_h.timeout = 100; start_ccb->ccb_h.cbfcnp = NULL; cts->ios.vccq = vccq_180; cts->ios_valid = MMC_VCCQ; xpt_action(start_ccb); break; } else { /* Set VCCQ = 3.3V */ start_ccb->ccb_h.func_code = XPT_SET_TRAN_SETTINGS; start_ccb->ccb_h.flags = CAM_DIR_NONE; start_ccb->ccb_h.retry_count = 0; start_ccb->ccb_h.timeout = 100; start_ccb->ccb_h.cbfcnp = NULL; cts->ios.vccq = vccq_330; cts->ios_valid = MMC_VCCQ; xpt_action(start_ccb); break; } } /* Set frequency on the controller */ start_ccb->ccb_h.func_code = XPT_SET_TRAN_SETTINGS; start_ccb->ccb_h.flags = CAM_DIR_NONE; start_ccb->ccb_h.retry_count = 0; start_ccb->ccb_h.timeout = 100; start_ccb->ccb_h.cbfcnp = NULL; cts->ios.clock = f_max; cts->ios_valid = MMC_CLK; xpt_action(start_ccb); /* Set bus width */ enum mmc_bus_width desired_bus_width = bus_width_1; enum mmc_bus_width max_host_bus_width = (host_caps & MMC_CAP_8_BIT_DATA ? bus_width_8 : host_caps & MMC_CAP_4_BIT_DATA ? bus_width_4 : bus_width_1); enum mmc_bus_width max_card_bus_width = bus_width_1; if (mmcp->card_features & CARD_FEATURE_SD20 && softc->scr.bus_widths & SD_SCR_BUS_WIDTH_4) max_card_bus_width = bus_width_4; /* * Unlike SD, MMC cards don't have any information about supported bus width... * So we need to perform read/write test to find out the width. */ /* TODO: figure out bus width for MMC; use 8-bit for now (to test on BBB) */ if (mmcp->card_features & CARD_FEATURE_MMC) max_card_bus_width = bus_width_8; desired_bus_width = min(max_host_bus_width, max_card_bus_width); CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Set bus width to %s (min of host %s and card %s)\n", bus_width_str(desired_bus_width), bus_width_str(max_host_bus_width), bus_width_str(max_card_bus_width))); sdda_set_bus_width(periph, start_ccb, desired_bus_width); softc->state = SDDA_STATE_NORMAL; cam_periph_unhold(periph); /* MMC partitions support */ if (mmcp->card_features & CARD_FEATURE_MMC && mmc_get_spec_vers(periph) >= 4) { sdda_process_mmc_partitions(periph, start_ccb); } else if (mmcp->card_features & CARD_FEATURE_SD20) { /* For SD[HC] cards, just add one partition that is the whole card */ sdda_add_part(periph, 0, "sdda", periph->unit_number, mmc_get_media_size(periph), sdda_get_read_only(periph, start_ccb)); softc->part_curr = 0; } cam_periph_hold(periph, PRIBIO|PCATCH); xpt_announce_periph(periph, softc->card_id_string); /* * Add async callbacks for bus reset and bus device reset calls. * I don't bother checking if this fails as, in most cases, * the system will function just fine without them and the only * alternative would be to not attach the device on failure. */ xpt_register_async(AC_LOST_DEVICE | AC_GETDEV_CHANGED | AC_ADVINFO_CHANGED, sddaasync, periph, periph->path); } static void sdda_add_part(struct cam_periph *periph, u_int type, const char *name, u_int cnt, off_t media_size, bool ro) { struct sdda_softc *sc = (struct sdda_softc *)periph->softc; struct sdda_part *part; struct ccb_pathinq cpi; CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Partition type '%s', size %ju %s\n", part_type(type), media_size, ro ? "(read-only)" : "")); part = sc->part[type] = malloc(sizeof(*part), M_DEVBUF, M_WAITOK | M_ZERO); part->cnt = cnt; part->type = type; part->ro = ro; part->sc = sc; snprintf(part->name, sizeof(part->name), name, periph->unit_number); /* * Due to the nature of RPMB partition it doesn't make much sense * to add it as a disk. It would be more appropriate to create a * userland tool to operate on the partition or leverage the existing * tools from sysutils/mmc-utils. */ if (type == EXT_CSD_PART_CONFIG_ACC_RPMB) { /* TODO: Create device, assign IOCTL handler */ CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Don't know what to do with RPMB partitions yet\n")); return; } bioq_init(&part->bio_queue); bzero(&cpi, sizeof(cpi)); xpt_setup_ccb(&cpi.ccb_h, periph->path, CAM_PRIORITY_NONE); cpi.ccb_h.func_code = XPT_PATH_INQ; xpt_action((union ccb *)&cpi); /* * Register this media as a disk */ (void)cam_periph_hold(periph, PRIBIO); cam_periph_unlock(periph); part->disk = disk_alloc(); part->disk->d_rotation_rate = DISK_RR_NON_ROTATING; part->disk->d_devstat = devstat_new_entry(part->name, cnt, 512, DEVSTAT_ALL_SUPPORTED, DEVSTAT_TYPE_DIRECT | XPORT_DEVSTAT_TYPE(cpi.transport), DEVSTAT_PRIORITY_DISK); part->disk->d_open = sddaopen; part->disk->d_close = sddaclose; part->disk->d_strategy = sddastrategy; part->disk->d_getattr = sddagetattr; // sc->disk->d_dump = sddadump; part->disk->d_gone = sddadiskgonecb; part->disk->d_name = part->name; part->disk->d_drv1 = part; part->disk->d_maxsize = MIN(MAXPHYS, sdda_get_max_data(periph, (union ccb *)&cpi) * mmc_get_sector_size(periph)); part->disk->d_unit = cnt; part->disk->d_flags = 0; strlcpy(part->disk->d_descr, sc->card_id_string, MIN(sizeof(part->disk->d_descr), sizeof(sc->card_id_string))); strlcpy(part->disk->d_ident, sc->card_sn_string, MIN(sizeof(part->disk->d_ident), sizeof(sc->card_sn_string))); part->disk->d_hba_vendor = cpi.hba_vendor; part->disk->d_hba_device = cpi.hba_device; part->disk->d_hba_subvendor = cpi.hba_subvendor; part->disk->d_hba_subdevice = cpi.hba_subdevice; snprintf(part->disk->d_attachment, sizeof(part->disk->d_attachment), "%s%d", cpi.dev_name, cpi.unit_number); part->disk->d_sectorsize = mmc_get_sector_size(periph); part->disk->d_mediasize = media_size; part->disk->d_stripesize = 0; part->disk->d_fwsectors = 0; part->disk->d_fwheads = 0; if (sdda_mmcsd_compat) disk_add_alias(part->disk, "mmcsd"); /* * Acquire a reference to the periph before we register with GEOM. * We'll release this reference once GEOM calls us back (via * sddadiskgonecb()) telling us that our provider has been freed. */ if (cam_periph_acquire(periph) != 0) { xpt_print(periph->path, "%s: lost periph during " "registration!\n", __func__); cam_periph_lock(periph); return; } disk_create(part->disk, DISK_VERSION); cam_periph_lock(periph); cam_periph_unhold(periph); } /* * For MMC cards, process EXT_CSD and add partitions that are supported by * this device. */ static void sdda_process_mmc_partitions(struct cam_periph *periph, union ccb *ccb) { struct sdda_softc *sc = (struct sdda_softc *)periph->softc; struct mmc_params *mmcp = &periph->path->device->mmc_ident_data; off_t erase_size, sector_size, size, wp_size; int i; const uint8_t *ext_csd; uint8_t rev; bool comp, ro; ext_csd = sc->raw_ext_csd; /* * Enhanced user data area and general purpose partitions are only * supported in revision 1.4 (EXT_CSD_REV == 4) and later, the RPMB * partition in revision 1.5 (MMC v4.41, EXT_CSD_REV == 5) and later. */ rev = ext_csd[EXT_CSD_REV]; /* * Ignore user-creatable enhanced user data area and general purpose * partitions partitions as long as partitioning hasn't been finished. */ comp = (ext_csd[EXT_CSD_PART_SET] & EXT_CSD_PART_SET_COMPLETED) != 0; /* * Add enhanced user data area slice, unless it spans the entirety of * the user data area. The enhanced area is of a multiple of high * capacity write protect groups ((ERASE_GRP_SIZE + HC_WP_GRP_SIZE) * * 512 KB) and its offset given in either sectors or bytes, depending * on whether it's a high capacity device or not. * NB: The slicer and its slices need to be registered before adding * the disk for the corresponding user data area as re-tasting is * racy. */ sector_size = mmc_get_sector_size(periph); size = ext_csd[EXT_CSD_ENH_SIZE_MULT] + (ext_csd[EXT_CSD_ENH_SIZE_MULT + 1] << 8) + (ext_csd[EXT_CSD_ENH_SIZE_MULT + 2] << 16); if (rev >= 4 && comp == TRUE && size > 0 && (ext_csd[EXT_CSD_PART_SUPPORT] & EXT_CSD_PART_SUPPORT_ENH_ATTR_EN) != 0 && (ext_csd[EXT_CSD_PART_ATTR] & (EXT_CSD_PART_ATTR_ENH_USR)) != 0) { erase_size = ext_csd[EXT_CSD_ERASE_GRP_SIZE] * 1024 * MMC_SECTOR_SIZE; wp_size = ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; size *= erase_size * wp_size; if (size != mmc_get_media_size(periph) * sector_size) { sc->enh_size = size; sc->enh_base = (ext_csd[EXT_CSD_ENH_START_ADDR] + (ext_csd[EXT_CSD_ENH_START_ADDR + 1] << 8) + (ext_csd[EXT_CSD_ENH_START_ADDR + 2] << 16) + (ext_csd[EXT_CSD_ENH_START_ADDR + 3] << 24)) * ((mmcp->card_features & CARD_FEATURE_SDHC) ? 1: MMC_SECTOR_SIZE); } else CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("enhanced user data area spans entire device")); } /* * Add default partition. This may be the only one or the user * data area in case partitions are supported. */ ro = sdda_get_read_only(periph, ccb); sdda_add_part(periph, EXT_CSD_PART_CONFIG_ACC_DEFAULT, "sdda", periph->unit_number, mmc_get_media_size(periph), ro); sc->part_curr = EXT_CSD_PART_CONFIG_ACC_DEFAULT; if (mmc_get_spec_vers(periph) < 3) return; /* Belatedly announce enhanced user data slice. */ if (sc->enh_size != 0) { CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("enhanced user data area off 0x%jx size %ju bytes\n", sc->enh_base, sc->enh_size)); } /* * Determine partition switch timeout (provided in units of 10 ms) * and ensure it's at least 300 ms as some eMMC chips lie. */ sc->part_time = max(ext_csd[EXT_CSD_PART_SWITCH_TO] * 10 * 1000, 300 * 1000); /* Add boot partitions, which are of a fixed multiple of 128 KB. */ size = ext_csd[EXT_CSD_BOOT_SIZE_MULT] * MMC_BOOT_RPMB_BLOCK_SIZE; if (size > 0 && (sdda_get_host_caps(periph, ccb) & MMC_CAP_BOOT_NOACC) == 0) { sdda_add_part(periph, EXT_CSD_PART_CONFIG_ACC_BOOT0, SDDA_FMT_BOOT, 0, size, ro | ((ext_csd[EXT_CSD_BOOT_WP_STATUS] & EXT_CSD_BOOT_WP_STATUS_BOOT0_MASK) != 0)); sdda_add_part(periph, EXT_CSD_PART_CONFIG_ACC_BOOT1, SDDA_FMT_BOOT, 1, size, ro | ((ext_csd[EXT_CSD_BOOT_WP_STATUS] & EXT_CSD_BOOT_WP_STATUS_BOOT1_MASK) != 0)); } /* Add RPMB partition, which also is of a fixed multiple of 128 KB. */ size = ext_csd[EXT_CSD_RPMB_MULT] * MMC_BOOT_RPMB_BLOCK_SIZE; if (rev >= 5 && size > 0) sdda_add_part(periph, EXT_CSD_PART_CONFIG_ACC_RPMB, SDDA_FMT_RPMB, 0, size, ro); if (rev <= 3 || comp == FALSE) return; /* * Add general purpose partitions, which are of a multiple of high * capacity write protect groups, too. */ if ((ext_csd[EXT_CSD_PART_SUPPORT] & EXT_CSD_PART_SUPPORT_EN) != 0) { erase_size = ext_csd[EXT_CSD_ERASE_GRP_SIZE] * 1024 * MMC_SECTOR_SIZE; wp_size = ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; for (i = 0; i < MMC_PART_GP_MAX; i++) { size = ext_csd[EXT_CSD_GP_SIZE_MULT + i * 3] + (ext_csd[EXT_CSD_GP_SIZE_MULT + i * 3 + 1] << 8) + (ext_csd[EXT_CSD_GP_SIZE_MULT + i * 3 + 2] << 16); if (size == 0) continue; sdda_add_part(periph, EXT_CSD_PART_CONFIG_ACC_GP0 + i, SDDA_FMT_GP, i, size * erase_size * wp_size, ro); } } } /* * We cannot just call mmc_switch() since it will sleep, and we are in * GEOM context and cannot sleep. Instead, create an MMCIO request to switch * partitions and send it to h/w, and upon completion resume processing * the I/O queue. * This function cannot fail, instead check switch errors in sddadone(). */ static void sdda_init_switch_part(struct cam_periph *periph, union ccb *start_ccb, u_int part) { struct sdda_softc *sc = (struct sdda_softc *)periph->softc; uint8_t value; sc->part_requested = part; value = (sc->raw_ext_csd[EXT_CSD_PART_CONFIG] & ~EXT_CSD_PART_CONFIG_ACC_MASK) | part; mmc_switch_fill_mmcio(start_ccb, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG, value, sc->part_time); start_ccb->ccb_h.cbfcnp = sddadone; sc->outstanding_cmds++; cam_periph_unlock(periph); xpt_action(start_ccb); cam_periph_lock(periph); } /* Called with periph lock held! */ static void sddastart(struct cam_periph *periph, union ccb *start_ccb) { struct bio *bp; struct sdda_softc *softc = (struct sdda_softc *)periph->softc; struct sdda_part *part; struct mmc_params *mmcp = &periph->path->device->mmc_ident_data; int part_index; CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("sddastart\n")); if (softc->state != SDDA_STATE_NORMAL) { CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("device is not in SDDA_STATE_NORMAL yet\n")); xpt_release_ccb(start_ccb); return; } /* Find partition that has outstanding commands. Prefer current partition. */ part = softc->part[softc->part_curr]; bp = bioq_first(&part->bio_queue); if (bp == NULL) { for (part_index = 0; part_index < MMC_PART_MAX; part_index++) { if ((part = softc->part[part_index]) != NULL && (bp = bioq_first(&softc->part[part_index]->bio_queue)) != NULL) break; } } if (bp == NULL) { xpt_release_ccb(start_ccb); return; } if (part_index != softc->part_curr) { CAM_DEBUG(periph->path, CAM_DEBUG_PERIPH, ("Partition %d -> %d\n", softc->part_curr, part_index)); /* * According to section "6.2.2 Command restrictions" of the eMMC * specification v5.1, CMD19/CMD21 aren't allowed to be used with * RPMB partitions. So we pause re-tuning along with triggering * it up-front to decrease the likelihood of re-tuning becoming * necessary while accessing an RPMB partition. Consequently, an * RPMB partition should immediately be switched away from again * after an access in order to allow for re-tuning to take place * anew. */ /* TODO: pause retune if switching to RPMB partition */ softc->state = SDDA_STATE_PART_SWITCH; sdda_init_switch_part(periph, start_ccb, part_index); return; } bioq_remove(&part->bio_queue, bp); switch (bp->bio_cmd) { case BIO_WRITE: CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("BIO_WRITE\n")); part->flags |= SDDA_FLAG_DIRTY; /* FALLTHROUGH */ case BIO_READ: { struct ccb_mmcio *mmcio; uint64_t blockno = bp->bio_pblkno; uint16_t count = bp->bio_bcount / 512; uint16_t opcode; if (bp->bio_cmd == BIO_READ) CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("BIO_READ\n")); CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("Block %"PRIu64" cnt %u\n", blockno, count)); /* Construct new MMC command */ if (bp->bio_cmd == BIO_READ) { if (count > 1) opcode = MMC_READ_MULTIPLE_BLOCK; else opcode = MMC_READ_SINGLE_BLOCK; } else { if (count > 1) opcode = MMC_WRITE_MULTIPLE_BLOCK; else opcode = MMC_WRITE_BLOCK; } start_ccb->ccb_h.func_code = XPT_MMC_IO; start_ccb->ccb_h.flags = (bp->bio_cmd == BIO_READ ? CAM_DIR_IN : CAM_DIR_OUT); start_ccb->ccb_h.retry_count = 0; start_ccb->ccb_h.timeout = 15 * 1000; start_ccb->ccb_h.cbfcnp = sddadone; mmcio = &start_ccb->mmcio; mmcio->cmd.opcode = opcode; mmcio->cmd.arg = blockno; if (!(mmcp->card_features & CARD_FEATURE_SDHC)) mmcio->cmd.arg <<= 9; mmcio->cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC; mmcio->cmd.data = softc->mmcdata; memset(mmcio->cmd.data, 0, sizeof(struct mmc_data)); mmcio->cmd.data->data = bp->bio_data; mmcio->cmd.data->len = 512 * count; mmcio->cmd.data->flags = (bp->bio_cmd == BIO_READ ? MMC_DATA_READ : MMC_DATA_WRITE); /* Direct h/w to issue CMD12 upon completion */ if (count > 1) { mmcio->cmd.data->flags |= MMC_DATA_MULTI; mmcio->stop.opcode = MMC_STOP_TRANSMISSION; mmcio->stop.flags = MMC_RSP_R1B | MMC_CMD_AC; mmcio->stop.arg = 0; } break; } case BIO_FLUSH: CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("BIO_FLUSH\n")); sddaschedule(periph); break; case BIO_DELETE: CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("BIO_DELETE\n")); sddaschedule(periph); break; default: biofinish(bp, NULL, EOPNOTSUPP); xpt_release_ccb(start_ccb); return; } start_ccb->ccb_h.ccb_bp = bp; softc->outstanding_cmds++; softc->refcount++; cam_periph_unlock(periph); xpt_action(start_ccb); cam_periph_lock(periph); /* May have more work to do, so ensure we stay scheduled */ sddaschedule(periph); } static void sddadone(struct cam_periph *periph, union ccb *done_ccb) { struct bio *bp; struct sdda_softc *softc; struct ccb_mmcio *mmcio; struct cam_path *path; uint32_t card_status; int error = 0; softc = (struct sdda_softc *)periph->softc; mmcio = &done_ccb->mmcio; path = done_ccb->ccb_h.path; CAM_DEBUG(path, CAM_DEBUG_TRACE, ("sddadone\n")); // cam_periph_lock(periph); if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Error!!!\n")); if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) cam_release_devq(path, /*relsim_flags*/0, /*reduction*/0, /*timeout*/0, /*getcount_only*/0); error = 5; /* EIO */ } else { if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) panic("REQ_CMP with QFRZN"); error = 0; } card_status = mmcio->cmd.resp[0]; CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Card status: %08x\n", R1_STATUS(card_status))); CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Current state: %d\n", R1_CURRENT_STATE(card_status))); /* Process result of switching MMC partitions */ if (softc->state == SDDA_STATE_PART_SWITCH) { CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Compteting partition switch to %d\n", softc->part_requested)); softc->outstanding_cmds--; /* Complete partition switch */ softc->state = SDDA_STATE_NORMAL; if (error != MMC_ERR_NONE) { /* TODO: Unpause retune if accessing RPMB */ xpt_release_ccb(done_ccb); xpt_schedule(periph, CAM_PRIORITY_NORMAL); return; } softc->raw_ext_csd[EXT_CSD_PART_CONFIG] = (softc->raw_ext_csd[EXT_CSD_PART_CONFIG] & ~EXT_CSD_PART_CONFIG_ACC_MASK) | softc->part_requested; /* TODO: Unpause retune if accessing RPMB */ softc->part_curr = softc->part_requested; xpt_release_ccb(done_ccb); /* Return to processing BIO requests */ xpt_schedule(periph, CAM_PRIORITY_NORMAL); return; } bp = (struct bio *)done_ccb->ccb_h.ccb_bp; bp->bio_error = error; if (error != 0) { bp->bio_resid = bp->bio_bcount; bp->bio_flags |= BIO_ERROR; } else { /* XXX: How many bytes remaining? */ bp->bio_resid = 0; if (bp->bio_resid > 0) bp->bio_flags |= BIO_ERROR; } softc->outstanding_cmds--; xpt_release_ccb(done_ccb); /* * Release the periph refcount taken in sddastart() for each CCB. */ KASSERT(softc->refcount >= 1, ("sddadone softc %p refcount %d", softc, softc->refcount)); softc->refcount--; biodone(bp); } static int sddaerror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) { return(cam_periph_error(ccb, cam_flags, sense_flags)); } #endif /* _KERNEL */ diff --git a/sys/compat/linuxkpi/common/src/linux_compat.c b/sys/compat/linuxkpi/common/src/linux_compat.c index 385dbc89b977..0d5e14b9d027 100644 --- a/sys/compat/linuxkpi/common/src/linux_compat.c +++ b/sys/compat/linuxkpi/common/src/linux_compat.c @@ -1,2548 +1,2548 @@ /*- * Copyright (c) 2010 Isilon Systems, Inc. * Copyright (c) 2010 iX Systems, Inc. * Copyright (c) 2010 Panasas, Inc. * Copyright (c) 2013-2018 Mellanox Technologies, Ltd. * 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 unmodified, 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 ``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 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_stack.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(__i386__) || defined(__amd64__) #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(__i386__) || defined(__amd64__) #include #endif SYSCTL_NODE(_compat, OID_AUTO, linuxkpi, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "LinuxKPI parameters"); int linuxkpi_debug; SYSCTL_INT(_compat_linuxkpi, OID_AUTO, debug, CTLFLAG_RWTUN, &linuxkpi_debug, 0, "Set to enable pr_debug() prints. Clear to disable."); MALLOC_DEFINE(M_KMALLOC, "linux", "Linux kmalloc compat"); #include /* Undo Linux compat changes. */ #undef RB_ROOT #undef file #undef cdev #define RB_ROOT(head) (head)->rbh_root static void linux_cdev_deref(struct linux_cdev *ldev); static struct vm_area_struct *linux_cdev_handle_find(void *handle); struct kobject linux_class_root; struct device linux_root_device; struct class linux_class_misc; struct list_head pci_drivers; struct list_head pci_devices; spinlock_t pci_lock; unsigned long linux_timer_hz_mask; int panic_cmp(struct rb_node *one, struct rb_node *two) { panic("no cmp"); } RB_GENERATE(linux_root, rb_node, __entry, panic_cmp); int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, va_list args) { va_list tmp_va; int len; char *old; char *name; char dummy; old = kobj->name; if (old && fmt == NULL) return (0); /* compute length of string */ va_copy(tmp_va, args); len = vsnprintf(&dummy, 0, fmt, tmp_va); va_end(tmp_va); /* account for zero termination */ len++; /* check for error */ if (len < 1) return (-EINVAL); /* allocate memory for string */ name = kzalloc(len, GFP_KERNEL); if (name == NULL) return (-ENOMEM); vsnprintf(name, len, fmt, args); kobj->name = name; /* free old string */ kfree(old); /* filter new string */ for (; *name != '\0'; name++) if (*name == '/') *name = '!'; return (0); } int kobject_set_name(struct kobject *kobj, const char *fmt, ...) { va_list args; int error; va_start(args, fmt); error = kobject_set_name_vargs(kobj, fmt, args); va_end(args); return (error); } static int kobject_add_complete(struct kobject *kobj, struct kobject *parent) { const struct kobj_type *t; int error; kobj->parent = parent; error = sysfs_create_dir(kobj); if (error == 0 && kobj->ktype && kobj->ktype->default_attrs) { struct attribute **attr; t = kobj->ktype; for (attr = t->default_attrs; *attr != NULL; attr++) { error = sysfs_create_file(kobj, *attr); if (error) break; } if (error) sysfs_remove_dir(kobj); } return (error); } int kobject_add(struct kobject *kobj, struct kobject *parent, const char *fmt, ...) { va_list args; int error; va_start(args, fmt); error = kobject_set_name_vargs(kobj, fmt, args); va_end(args); if (error) return (error); return kobject_add_complete(kobj, parent); } void linux_kobject_release(struct kref *kref) { struct kobject *kobj; char *name; kobj = container_of(kref, struct kobject, kref); sysfs_remove_dir(kobj); name = kobj->name; if (kobj->ktype && kobj->ktype->release) kobj->ktype->release(kobj); kfree(name); } static void linux_kobject_kfree(struct kobject *kobj) { kfree(kobj); } static void linux_kobject_kfree_name(struct kobject *kobj) { if (kobj) { kfree(kobj->name); } } const struct kobj_type linux_kfree_type = { .release = linux_kobject_kfree }; static void linux_device_release(struct device *dev) { pr_debug("linux_device_release: %s\n", dev_name(dev)); kfree(dev); } static ssize_t linux_class_show(struct kobject *kobj, struct attribute *attr, char *buf) { struct class_attribute *dattr; ssize_t error; dattr = container_of(attr, struct class_attribute, attr); error = -EIO; if (dattr->show) error = dattr->show(container_of(kobj, struct class, kobj), dattr, buf); return (error); } static ssize_t linux_class_store(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) { struct class_attribute *dattr; ssize_t error; dattr = container_of(attr, struct class_attribute, attr); error = -EIO; if (dattr->store) error = dattr->store(container_of(kobj, struct class, kobj), dattr, buf, count); return (error); } static void linux_class_release(struct kobject *kobj) { struct class *class; class = container_of(kobj, struct class, kobj); if (class->class_release) class->class_release(class); } static const struct sysfs_ops linux_class_sysfs = { .show = linux_class_show, .store = linux_class_store, }; const struct kobj_type linux_class_ktype = { .release = linux_class_release, .sysfs_ops = &linux_class_sysfs }; static void linux_dev_release(struct kobject *kobj) { struct device *dev; dev = container_of(kobj, struct device, kobj); /* This is the precedence defined by linux. */ if (dev->release) dev->release(dev); else if (dev->class && dev->class->dev_release) dev->class->dev_release(dev); } static ssize_t linux_dev_show(struct kobject *kobj, struct attribute *attr, char *buf) { struct device_attribute *dattr; ssize_t error; dattr = container_of(attr, struct device_attribute, attr); error = -EIO; if (dattr->show) error = dattr->show(container_of(kobj, struct device, kobj), dattr, buf); return (error); } static ssize_t linux_dev_store(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) { struct device_attribute *dattr; ssize_t error; dattr = container_of(attr, struct device_attribute, attr); error = -EIO; if (dattr->store) error = dattr->store(container_of(kobj, struct device, kobj), dattr, buf, count); return (error); } static const struct sysfs_ops linux_dev_sysfs = { .show = linux_dev_show, .store = linux_dev_store, }; const struct kobj_type linux_dev_ktype = { .release = linux_dev_release, .sysfs_ops = &linux_dev_sysfs }; struct device * device_create(struct class *class, struct device *parent, dev_t devt, void *drvdata, const char *fmt, ...) { struct device *dev; va_list args; dev = kzalloc(sizeof(*dev), M_WAITOK); dev->parent = parent; dev->class = class; dev->devt = devt; dev->driver_data = drvdata; dev->release = linux_device_release; va_start(args, fmt); kobject_set_name_vargs(&dev->kobj, fmt, args); va_end(args); device_register(dev); return (dev); } int kobject_init_and_add(struct kobject *kobj, const struct kobj_type *ktype, struct kobject *parent, const char *fmt, ...) { va_list args; int error; kobject_init(kobj, ktype); kobj->ktype = ktype; kobj->parent = parent; kobj->name = NULL; va_start(args, fmt); error = kobject_set_name_vargs(kobj, fmt, args); va_end(args); if (error) return (error); return kobject_add_complete(kobj, parent); } static void linux_kq_lock(void *arg) { spinlock_t *s = arg; spin_lock(s); } static void linux_kq_unlock(void *arg) { spinlock_t *s = arg; spin_unlock(s); } static void linux_kq_lock_owned(void *arg) { #ifdef INVARIANTS spinlock_t *s = arg; mtx_assert(&s->m, MA_OWNED); #endif } static void linux_kq_lock_unowned(void *arg) { #ifdef INVARIANTS spinlock_t *s = arg; mtx_assert(&s->m, MA_NOTOWNED); #endif } static void linux_file_kqfilter_poll(struct linux_file *, int); struct linux_file * linux_file_alloc(void) { struct linux_file *filp; filp = kzalloc(sizeof(*filp), GFP_KERNEL); /* set initial refcount */ filp->f_count = 1; /* setup fields needed by kqueue support */ spin_lock_init(&filp->f_kqlock); knlist_init(&filp->f_selinfo.si_note, &filp->f_kqlock, linux_kq_lock, linux_kq_unlock, linux_kq_lock_owned, linux_kq_lock_unowned); return (filp); } void linux_file_free(struct linux_file *filp) { if (filp->_file == NULL) { if (filp->f_shmem != NULL) vm_object_deallocate(filp->f_shmem); kfree(filp); } else { /* * The close method of the character device or file * will free the linux_file structure: */ _fdrop(filp->_file, curthread); } } static int linux_cdev_pager_fault(vm_object_t vm_obj, vm_ooffset_t offset, int prot, vm_page_t *mres) { struct vm_area_struct *vmap; vmap = linux_cdev_handle_find(vm_obj->handle); MPASS(vmap != NULL); MPASS(vmap->vm_private_data == vm_obj->handle); if (likely(vmap->vm_ops != NULL && offset < vmap->vm_len)) { vm_paddr_t paddr = IDX_TO_OFF(vmap->vm_pfn) + offset; vm_page_t page; if (((*mres)->flags & PG_FICTITIOUS) != 0) { /* * If the passed in result page is a fake * page, update it with the new physical * address. */ page = *mres; vm_page_updatefake(page, paddr, vm_obj->memattr); } else { /* * Replace the passed in "mres" page with our * own fake page and free up the all of the * original pages. */ VM_OBJECT_WUNLOCK(vm_obj); page = vm_page_getfake(paddr, vm_obj->memattr); VM_OBJECT_WLOCK(vm_obj); vm_page_replace(page, vm_obj, (*mres)->pindex, *mres); *mres = page; } vm_page_valid(page); return (VM_PAGER_OK); } return (VM_PAGER_FAIL); } static int linux_cdev_pager_populate(vm_object_t vm_obj, vm_pindex_t pidx, int fault_type, vm_prot_t max_prot, vm_pindex_t *first, vm_pindex_t *last) { struct vm_area_struct *vmap; int err; /* get VM area structure */ vmap = linux_cdev_handle_find(vm_obj->handle); MPASS(vmap != NULL); MPASS(vmap->vm_private_data == vm_obj->handle); VM_OBJECT_WUNLOCK(vm_obj); linux_set_current(curthread); down_write(&vmap->vm_mm->mmap_sem); if (unlikely(vmap->vm_ops == NULL)) { err = VM_FAULT_SIGBUS; } else { struct vm_fault vmf; /* fill out VM fault structure */ vmf.virtual_address = (void *)(uintptr_t)IDX_TO_OFF(pidx); vmf.flags = (fault_type & VM_PROT_WRITE) ? FAULT_FLAG_WRITE : 0; vmf.pgoff = 0; vmf.page = NULL; vmf.vma = vmap; vmap->vm_pfn_count = 0; vmap->vm_pfn_pcount = &vmap->vm_pfn_count; vmap->vm_obj = vm_obj; err = vmap->vm_ops->fault(vmap, &vmf); while (vmap->vm_pfn_count == 0 && err == VM_FAULT_NOPAGE) { kern_yield(PRI_USER); err = vmap->vm_ops->fault(vmap, &vmf); } } /* translate return code */ switch (err) { case VM_FAULT_OOM: err = VM_PAGER_AGAIN; break; case VM_FAULT_SIGBUS: err = VM_PAGER_BAD; break; case VM_FAULT_NOPAGE: /* * By contract the fault handler will return having * busied all the pages itself. If pidx is already * found in the object, it will simply xbusy the first * page and return with vm_pfn_count set to 1. */ *first = vmap->vm_pfn_first; *last = *first + vmap->vm_pfn_count - 1; err = VM_PAGER_OK; break; default: err = VM_PAGER_ERROR; break; } up_write(&vmap->vm_mm->mmap_sem); VM_OBJECT_WLOCK(vm_obj); return (err); } static struct rwlock linux_vma_lock; static TAILQ_HEAD(, vm_area_struct) linux_vma_head = TAILQ_HEAD_INITIALIZER(linux_vma_head); static void linux_cdev_handle_free(struct vm_area_struct *vmap) { /* Drop reference on vm_file */ if (vmap->vm_file != NULL) fput(vmap->vm_file); /* Drop reference on mm_struct */ mmput(vmap->vm_mm); kfree(vmap); } static void linux_cdev_handle_remove(struct vm_area_struct *vmap) { rw_wlock(&linux_vma_lock); TAILQ_REMOVE(&linux_vma_head, vmap, vm_entry); rw_wunlock(&linux_vma_lock); } static struct vm_area_struct * linux_cdev_handle_find(void *handle) { struct vm_area_struct *vmap; rw_rlock(&linux_vma_lock); TAILQ_FOREACH(vmap, &linux_vma_head, vm_entry) { if (vmap->vm_private_data == handle) break; } rw_runlock(&linux_vma_lock); return (vmap); } static int linux_cdev_pager_ctor(void *handle, vm_ooffset_t size, vm_prot_t prot, vm_ooffset_t foff, struct ucred *cred, u_short *color) { MPASS(linux_cdev_handle_find(handle) != NULL); *color = 0; return (0); } static void linux_cdev_pager_dtor(void *handle) { const struct vm_operations_struct *vm_ops; struct vm_area_struct *vmap; vmap = linux_cdev_handle_find(handle); MPASS(vmap != NULL); /* * Remove handle before calling close operation to prevent * other threads from reusing the handle pointer. */ linux_cdev_handle_remove(vmap); down_write(&vmap->vm_mm->mmap_sem); vm_ops = vmap->vm_ops; if (likely(vm_ops != NULL)) vm_ops->close(vmap); up_write(&vmap->vm_mm->mmap_sem); linux_cdev_handle_free(vmap); } static struct cdev_pager_ops linux_cdev_pager_ops[2] = { { /* OBJT_MGTDEVICE */ .cdev_pg_populate = linux_cdev_pager_populate, .cdev_pg_ctor = linux_cdev_pager_ctor, .cdev_pg_dtor = linux_cdev_pager_dtor }, { /* OBJT_DEVICE */ .cdev_pg_fault = linux_cdev_pager_fault, .cdev_pg_ctor = linux_cdev_pager_ctor, .cdev_pg_dtor = linux_cdev_pager_dtor }, }; int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address, unsigned long size) { vm_object_t obj; vm_page_t m; obj = vma->vm_obj; if (obj == NULL || (obj->flags & OBJ_UNMANAGED) != 0) return (-ENOTSUP); VM_OBJECT_RLOCK(obj); for (m = vm_page_find_least(obj, OFF_TO_IDX(address)); m != NULL && m->pindex < OFF_TO_IDX(address + size); m = TAILQ_NEXT(m, listq)) pmap_remove_all(m); VM_OBJECT_RUNLOCK(obj); return (0); } static struct file_operations dummy_ldev_ops = { /* XXXKIB */ }; static struct linux_cdev dummy_ldev = { .ops = &dummy_ldev_ops, }; #define LDEV_SI_DTR 0x0001 #define LDEV_SI_REF 0x0002 static void linux_get_fop(struct linux_file *filp, const struct file_operations **fop, struct linux_cdev **dev) { struct linux_cdev *ldev; u_int siref; ldev = filp->f_cdev; *fop = filp->f_op; if (ldev != NULL) { for (siref = ldev->siref;;) { if ((siref & LDEV_SI_DTR) != 0) { ldev = &dummy_ldev; siref = ldev->siref; *fop = ldev->ops; MPASS((ldev->siref & LDEV_SI_DTR) == 0); } else if (atomic_fcmpset_int(&ldev->siref, &siref, siref + LDEV_SI_REF)) { break; } } } *dev = ldev; } static void linux_drop_fop(struct linux_cdev *ldev) { if (ldev == NULL) return; MPASS((ldev->siref & ~LDEV_SI_DTR) != 0); atomic_subtract_int(&ldev->siref, LDEV_SI_REF); } #define OPW(fp,td,code) ({ \ struct file *__fpop; \ __typeof(code) __retval; \ \ __fpop = (td)->td_fpop; \ (td)->td_fpop = (fp); \ __retval = (code); \ (td)->td_fpop = __fpop; \ __retval; \ }) static int linux_dev_fdopen(struct cdev *dev, int fflags, struct thread *td, struct file *file) { struct linux_cdev *ldev; struct linux_file *filp; const struct file_operations *fop; int error; ldev = dev->si_drv1; filp = linux_file_alloc(); filp->f_dentry = &filp->f_dentry_store; filp->f_op = ldev->ops; filp->f_mode = file->f_flag; filp->f_flags = file->f_flag; filp->f_vnode = file->f_vnode; filp->_file = file; refcount_acquire(&ldev->refs); filp->f_cdev = ldev; linux_set_current(td); linux_get_fop(filp, &fop, &ldev); if (fop->open != NULL) { error = -fop->open(file->f_vnode, filp); if (error != 0) { linux_drop_fop(ldev); linux_cdev_deref(filp->f_cdev); kfree(filp); return (error); } } /* hold on to the vnode - used for fstat() */ vhold(filp->f_vnode); /* release the file from devfs */ finit(file, filp->f_mode, DTYPE_DEV, filp, &linuxfileops); linux_drop_fop(ldev); return (ENXIO); } #define LINUX_IOCTL_MIN_PTR 0x10000UL #define LINUX_IOCTL_MAX_PTR (LINUX_IOCTL_MIN_PTR + IOCPARM_MAX) static inline int linux_remap_address(void **uaddr, size_t len) { uintptr_t uaddr_val = (uintptr_t)(*uaddr); if (unlikely(uaddr_val >= LINUX_IOCTL_MIN_PTR && uaddr_val < LINUX_IOCTL_MAX_PTR)) { struct task_struct *pts = current; if (pts == NULL) { *uaddr = NULL; return (1); } /* compute data offset */ uaddr_val -= LINUX_IOCTL_MIN_PTR; /* check that length is within bounds */ if ((len > IOCPARM_MAX) || (uaddr_val + len) > pts->bsd_ioctl_len) { *uaddr = NULL; return (1); } /* re-add kernel buffer address */ uaddr_val += (uintptr_t)pts->bsd_ioctl_data; /* update address location */ *uaddr = (void *)uaddr_val; return (1); } return (0); } int linux_copyin(const void *uaddr, void *kaddr, size_t len) { if (linux_remap_address(__DECONST(void **, &uaddr), len)) { if (uaddr == NULL) return (-EFAULT); memcpy(kaddr, uaddr, len); return (0); } return (-copyin(uaddr, kaddr, len)); } int linux_copyout(const void *kaddr, void *uaddr, size_t len) { if (linux_remap_address(&uaddr, len)) { if (uaddr == NULL) return (-EFAULT); memcpy(uaddr, kaddr, len); return (0); } return (-copyout(kaddr, uaddr, len)); } size_t linux_clear_user(void *_uaddr, size_t _len) { uint8_t *uaddr = _uaddr; size_t len = _len; /* make sure uaddr is aligned before going into the fast loop */ while (((uintptr_t)uaddr & 7) != 0 && len > 7) { if (subyte(uaddr, 0)) return (_len); uaddr++; len--; } /* zero 8 bytes at a time */ while (len > 7) { #ifdef __LP64__ if (suword64(uaddr, 0)) return (_len); #else if (suword32(uaddr, 0)) return (_len); if (suword32(uaddr + 4, 0)) return (_len); #endif uaddr += 8; len -= 8; } /* zero fill end, if any */ while (len > 0) { if (subyte(uaddr, 0)) return (_len); uaddr++; len--; } return (0); } int linux_access_ok(const void *uaddr, size_t len) { uintptr_t saddr; uintptr_t eaddr; /* get start and end address */ saddr = (uintptr_t)uaddr; eaddr = (uintptr_t)uaddr + len; /* verify addresses are valid for userspace */ return ((saddr == eaddr) || (eaddr > saddr && eaddr <= VM_MAXUSER_ADDRESS)); } /* * This function should return either EINTR or ERESTART depending on * the signal type sent to this thread: */ static int linux_get_error(struct task_struct *task, int error) { /* check for signal type interrupt code */ if (error == EINTR || error == ERESTARTSYS || error == ERESTART) { error = -linux_schedule_get_interrupt_value(task); if (error == 0) error = EINTR; } return (error); } static int linux_file_ioctl_sub(struct file *fp, struct linux_file *filp, const struct file_operations *fop, u_long cmd, caddr_t data, struct thread *td) { struct task_struct *task = current; unsigned size; int error; size = IOCPARM_LEN(cmd); /* refer to logic in sys_ioctl() */ if (size > 0) { /* * Setup hint for linux_copyin() and linux_copyout(). * * Background: Linux code expects a user-space address * while FreeBSD supplies a kernel-space address. */ task->bsd_ioctl_data = data; task->bsd_ioctl_len = size; data = (void *)LINUX_IOCTL_MIN_PTR; } else { /* fetch user-space pointer */ data = *(void **)data; } #if defined(__amd64__) if (td->td_proc->p_elf_machine == EM_386) { /* try the compat IOCTL handler first */ if (fop->compat_ioctl != NULL) { error = -OPW(fp, td, fop->compat_ioctl(filp, cmd, (u_long)data)); } else { error = ENOTTY; } /* fallback to the regular IOCTL handler, if any */ if (error == ENOTTY && fop->unlocked_ioctl != NULL) { error = -OPW(fp, td, fop->unlocked_ioctl(filp, cmd, (u_long)data)); } } else #endif { if (fop->unlocked_ioctl != NULL) { error = -OPW(fp, td, fop->unlocked_ioctl(filp, cmd, (u_long)data)); } else { error = ENOTTY; } } if (size > 0) { task->bsd_ioctl_data = NULL; task->bsd_ioctl_len = 0; } if (error == EWOULDBLOCK) { /* update kqfilter status, if any */ linux_file_kqfilter_poll(filp, LINUX_KQ_FLAG_HAS_READ | LINUX_KQ_FLAG_HAS_WRITE); } else { error = linux_get_error(task, error); } return (error); } #define LINUX_POLL_TABLE_NORMAL ((poll_table *)1) /* * This function atomically updates the poll wakeup state and returns * the previous state at the time of update. */ static uint8_t linux_poll_wakeup_state(atomic_t *v, const uint8_t *pstate) { int c, old; c = v->counter; while ((old = atomic_cmpxchg(v, c, pstate[c])) != c) c = old; return (c); } static int linux_poll_wakeup_callback(wait_queue_t *wq, unsigned int wq_state, int flags, void *key) { static const uint8_t state[LINUX_FWQ_STATE_MAX] = { [LINUX_FWQ_STATE_INIT] = LINUX_FWQ_STATE_INIT, /* NOP */ [LINUX_FWQ_STATE_NOT_READY] = LINUX_FWQ_STATE_NOT_READY, /* NOP */ [LINUX_FWQ_STATE_QUEUED] = LINUX_FWQ_STATE_READY, [LINUX_FWQ_STATE_READY] = LINUX_FWQ_STATE_READY, /* NOP */ }; struct linux_file *filp = container_of(wq, struct linux_file, f_wait_queue.wq); switch (linux_poll_wakeup_state(&filp->f_wait_queue.state, state)) { case LINUX_FWQ_STATE_QUEUED: linux_poll_wakeup(filp); return (1); default: return (0); } } void linux_poll_wait(struct linux_file *filp, wait_queue_head_t *wqh, poll_table *p) { static const uint8_t state[LINUX_FWQ_STATE_MAX] = { [LINUX_FWQ_STATE_INIT] = LINUX_FWQ_STATE_NOT_READY, [LINUX_FWQ_STATE_NOT_READY] = LINUX_FWQ_STATE_NOT_READY, /* NOP */ [LINUX_FWQ_STATE_QUEUED] = LINUX_FWQ_STATE_QUEUED, /* NOP */ [LINUX_FWQ_STATE_READY] = LINUX_FWQ_STATE_QUEUED, }; /* check if we are called inside the select system call */ if (p == LINUX_POLL_TABLE_NORMAL) selrecord(curthread, &filp->f_selinfo); switch (linux_poll_wakeup_state(&filp->f_wait_queue.state, state)) { case LINUX_FWQ_STATE_INIT: /* NOTE: file handles can only belong to one wait-queue */ filp->f_wait_queue.wqh = wqh; filp->f_wait_queue.wq.func = &linux_poll_wakeup_callback; add_wait_queue(wqh, &filp->f_wait_queue.wq); atomic_set(&filp->f_wait_queue.state, LINUX_FWQ_STATE_QUEUED); break; default: break; } } static void linux_poll_wait_dequeue(struct linux_file *filp) { static const uint8_t state[LINUX_FWQ_STATE_MAX] = { [LINUX_FWQ_STATE_INIT] = LINUX_FWQ_STATE_INIT, /* NOP */ [LINUX_FWQ_STATE_NOT_READY] = LINUX_FWQ_STATE_INIT, [LINUX_FWQ_STATE_QUEUED] = LINUX_FWQ_STATE_INIT, [LINUX_FWQ_STATE_READY] = LINUX_FWQ_STATE_INIT, }; seldrain(&filp->f_selinfo); switch (linux_poll_wakeup_state(&filp->f_wait_queue.state, state)) { case LINUX_FWQ_STATE_NOT_READY: case LINUX_FWQ_STATE_QUEUED: case LINUX_FWQ_STATE_READY: remove_wait_queue(filp->f_wait_queue.wqh, &filp->f_wait_queue.wq); break; default: break; } } void linux_poll_wakeup(struct linux_file *filp) { /* this function should be NULL-safe */ if (filp == NULL) return; selwakeup(&filp->f_selinfo); spin_lock(&filp->f_kqlock); filp->f_kqflags |= LINUX_KQ_FLAG_NEED_READ | LINUX_KQ_FLAG_NEED_WRITE; /* make sure the "knote" gets woken up */ KNOTE_LOCKED(&filp->f_selinfo.si_note, 1); spin_unlock(&filp->f_kqlock); } static void linux_file_kqfilter_detach(struct knote *kn) { struct linux_file *filp = kn->kn_hook; spin_lock(&filp->f_kqlock); knlist_remove(&filp->f_selinfo.si_note, kn, 1); spin_unlock(&filp->f_kqlock); } static int linux_file_kqfilter_read_event(struct knote *kn, long hint) { struct linux_file *filp = kn->kn_hook; mtx_assert(&filp->f_kqlock.m, MA_OWNED); return ((filp->f_kqflags & LINUX_KQ_FLAG_NEED_READ) ? 1 : 0); } static int linux_file_kqfilter_write_event(struct knote *kn, long hint) { struct linux_file *filp = kn->kn_hook; mtx_assert(&filp->f_kqlock.m, MA_OWNED); return ((filp->f_kqflags & LINUX_KQ_FLAG_NEED_WRITE) ? 1 : 0); } static struct filterops linux_dev_kqfiltops_read = { .f_isfd = 1, .f_detach = linux_file_kqfilter_detach, .f_event = linux_file_kqfilter_read_event, }; static struct filterops linux_dev_kqfiltops_write = { .f_isfd = 1, .f_detach = linux_file_kqfilter_detach, .f_event = linux_file_kqfilter_write_event, }; static void linux_file_kqfilter_poll(struct linux_file *filp, int kqflags) { struct thread *td; const struct file_operations *fop; struct linux_cdev *ldev; int temp; if ((filp->f_kqflags & kqflags) == 0) return; td = curthread; linux_get_fop(filp, &fop, &ldev); /* get the latest polling state */ temp = OPW(filp->_file, td, fop->poll(filp, NULL)); linux_drop_fop(ldev); spin_lock(&filp->f_kqlock); /* clear kqflags */ filp->f_kqflags &= ~(LINUX_KQ_FLAG_NEED_READ | LINUX_KQ_FLAG_NEED_WRITE); /* update kqflags */ if ((temp & (POLLIN | POLLOUT)) != 0) { if ((temp & POLLIN) != 0) filp->f_kqflags |= LINUX_KQ_FLAG_NEED_READ; if ((temp & POLLOUT) != 0) filp->f_kqflags |= LINUX_KQ_FLAG_NEED_WRITE; /* make sure the "knote" gets woken up */ KNOTE_LOCKED(&filp->f_selinfo.si_note, 0); } spin_unlock(&filp->f_kqlock); } static int linux_file_kqfilter(struct file *file, struct knote *kn) { struct linux_file *filp; struct thread *td; int error; td = curthread; filp = (struct linux_file *)file->f_data; filp->f_flags = file->f_flag; if (filp->f_op->poll == NULL) return (EINVAL); spin_lock(&filp->f_kqlock); switch (kn->kn_filter) { case EVFILT_READ: filp->f_kqflags |= LINUX_KQ_FLAG_HAS_READ; kn->kn_fop = &linux_dev_kqfiltops_read; kn->kn_hook = filp; knlist_add(&filp->f_selinfo.si_note, kn, 1); error = 0; break; case EVFILT_WRITE: filp->f_kqflags |= LINUX_KQ_FLAG_HAS_WRITE; kn->kn_fop = &linux_dev_kqfiltops_write; kn->kn_hook = filp; knlist_add(&filp->f_selinfo.si_note, kn, 1); error = 0; break; default: error = EINVAL; break; } spin_unlock(&filp->f_kqlock); if (error == 0) { linux_set_current(td); /* update kqfilter status, if any */ linux_file_kqfilter_poll(filp, LINUX_KQ_FLAG_HAS_READ | LINUX_KQ_FLAG_HAS_WRITE); } return (error); } static int linux_file_mmap_single(struct file *fp, const struct file_operations *fop, vm_ooffset_t *offset, vm_size_t size, struct vm_object **object, int nprot, struct thread *td) { struct task_struct *task; struct vm_area_struct *vmap; struct mm_struct *mm; struct linux_file *filp; vm_memattr_t attr; int error; filp = (struct linux_file *)fp->f_data; filp->f_flags = fp->f_flag; if (fop->mmap == NULL) return (EOPNOTSUPP); linux_set_current(td); /* * The same VM object might be shared by multiple processes * and the mm_struct is usually freed when a process exits. * * The atomic reference below makes sure the mm_struct is * available as long as the vmap is in the linux_vma_head. */ task = current; mm = task->mm; if (atomic_inc_not_zero(&mm->mm_users) == 0) return (EINVAL); vmap = kzalloc(sizeof(*vmap), GFP_KERNEL); vmap->vm_start = 0; vmap->vm_end = size; vmap->vm_pgoff = *offset / PAGE_SIZE; vmap->vm_pfn = 0; vmap->vm_flags = vmap->vm_page_prot = (nprot & VM_PROT_ALL); vmap->vm_ops = NULL; vmap->vm_file = get_file(filp); vmap->vm_mm = mm; if (unlikely(down_write_killable(&vmap->vm_mm->mmap_sem))) { error = linux_get_error(task, EINTR); } else { error = -OPW(fp, td, fop->mmap(filp, vmap)); error = linux_get_error(task, error); up_write(&vmap->vm_mm->mmap_sem); } if (error != 0) { linux_cdev_handle_free(vmap); return (error); } attr = pgprot2cachemode(vmap->vm_page_prot); if (vmap->vm_ops != NULL) { struct vm_area_struct *ptr; void *vm_private_data; bool vm_no_fault; if (vmap->vm_ops->open == NULL || vmap->vm_ops->close == NULL || vmap->vm_private_data == NULL) { /* free allocated VM area struct */ linux_cdev_handle_free(vmap); return (EINVAL); } vm_private_data = vmap->vm_private_data; rw_wlock(&linux_vma_lock); TAILQ_FOREACH(ptr, &linux_vma_head, vm_entry) { if (ptr->vm_private_data == vm_private_data) break; } /* check if there is an existing VM area struct */ if (ptr != NULL) { /* check if the VM area structure is invalid */ if (ptr->vm_ops == NULL || ptr->vm_ops->open == NULL || ptr->vm_ops->close == NULL) { error = ESTALE; vm_no_fault = 1; } else { error = EEXIST; vm_no_fault = (ptr->vm_ops->fault == NULL); } } else { /* insert VM area structure into list */ TAILQ_INSERT_TAIL(&linux_vma_head, vmap, vm_entry); error = 0; vm_no_fault = (vmap->vm_ops->fault == NULL); } rw_wunlock(&linux_vma_lock); if (error != 0) { /* free allocated VM area struct */ linux_cdev_handle_free(vmap); /* check for stale VM area struct */ if (error != EEXIST) return (error); } /* check if there is no fault handler */ if (vm_no_fault) { *object = cdev_pager_allocate(vm_private_data, OBJT_DEVICE, &linux_cdev_pager_ops[1], size, nprot, *offset, td->td_ucred); } else { *object = cdev_pager_allocate(vm_private_data, OBJT_MGTDEVICE, &linux_cdev_pager_ops[0], size, nprot, *offset, td->td_ucred); } /* check if allocating the VM object failed */ if (*object == NULL) { if (error == 0) { /* remove VM area struct from list */ linux_cdev_handle_remove(vmap); /* free allocated VM area struct */ linux_cdev_handle_free(vmap); } return (EINVAL); } } else { struct sglist *sg; sg = sglist_alloc(1, M_WAITOK); sglist_append_phys(sg, (vm_paddr_t)vmap->vm_pfn << PAGE_SHIFT, vmap->vm_len); *object = vm_pager_allocate(OBJT_SG, sg, vmap->vm_len, nprot, 0, td->td_ucred); linux_cdev_handle_free(vmap); if (*object == NULL) { sglist_free(sg); return (EINVAL); } } if (attr != VM_MEMATTR_DEFAULT) { VM_OBJECT_WLOCK(*object); vm_object_set_memattr(*object, attr); VM_OBJECT_WUNLOCK(*object); } *offset = 0; return (0); } struct cdevsw linuxcdevsw = { .d_version = D_VERSION, .d_fdopen = linux_dev_fdopen, .d_name = "lkpidev", }; static int linux_file_read(struct file *file, struct uio *uio, struct ucred *active_cred, int flags, struct thread *td) { struct linux_file *filp; const struct file_operations *fop; struct linux_cdev *ldev; ssize_t bytes; int error; error = 0; filp = (struct linux_file *)file->f_data; filp->f_flags = file->f_flag; /* XXX no support for I/O vectors currently */ if (uio->uio_iovcnt != 1) return (EOPNOTSUPP); if (uio->uio_resid > DEVFS_IOSIZE_MAX) return (EINVAL); linux_set_current(td); linux_get_fop(filp, &fop, &ldev); if (fop->read != NULL) { bytes = OPW(file, td, fop->read(filp, uio->uio_iov->iov_base, uio->uio_iov->iov_len, &uio->uio_offset)); if (bytes >= 0) { uio->uio_iov->iov_base = ((uint8_t *)uio->uio_iov->iov_base) + bytes; uio->uio_iov->iov_len -= bytes; uio->uio_resid -= bytes; } else { error = linux_get_error(current, -bytes); } } else error = ENXIO; /* update kqfilter status, if any */ linux_file_kqfilter_poll(filp, LINUX_KQ_FLAG_HAS_READ); linux_drop_fop(ldev); return (error); } static int linux_file_write(struct file *file, struct uio *uio, struct ucred *active_cred, int flags, struct thread *td) { struct linux_file *filp; const struct file_operations *fop; struct linux_cdev *ldev; ssize_t bytes; int error; filp = (struct linux_file *)file->f_data; filp->f_flags = file->f_flag; /* XXX no support for I/O vectors currently */ if (uio->uio_iovcnt != 1) return (EOPNOTSUPP); if (uio->uio_resid > DEVFS_IOSIZE_MAX) return (EINVAL); linux_set_current(td); linux_get_fop(filp, &fop, &ldev); if (fop->write != NULL) { bytes = OPW(file, td, fop->write(filp, uio->uio_iov->iov_base, uio->uio_iov->iov_len, &uio->uio_offset)); if (bytes >= 0) { uio->uio_iov->iov_base = ((uint8_t *)uio->uio_iov->iov_base) + bytes; uio->uio_iov->iov_len -= bytes; uio->uio_resid -= bytes; error = 0; } else { error = linux_get_error(current, -bytes); } } else error = ENXIO; /* update kqfilter status, if any */ linux_file_kqfilter_poll(filp, LINUX_KQ_FLAG_HAS_WRITE); linux_drop_fop(ldev); return (error); } static int linux_file_poll(struct file *file, int events, struct ucred *active_cred, struct thread *td) { struct linux_file *filp; const struct file_operations *fop; struct linux_cdev *ldev; int revents; filp = (struct linux_file *)file->f_data; filp->f_flags = file->f_flag; linux_set_current(td); linux_get_fop(filp, &fop, &ldev); if (fop->poll != NULL) { revents = OPW(file, td, fop->poll(filp, LINUX_POLL_TABLE_NORMAL)) & events; } else { revents = 0; } linux_drop_fop(ldev); return (revents); } static int linux_file_close(struct file *file, struct thread *td) { struct linux_file *filp; int (*release)(struct inode *, struct linux_file *); const struct file_operations *fop; struct linux_cdev *ldev; int error; filp = (struct linux_file *)file->f_data; KASSERT(file_count(filp) == 0, ("File refcount(%d) is not zero", file_count(filp))); if (td == NULL) td = curthread; error = 0; filp->f_flags = file->f_flag; linux_set_current(td); linux_poll_wait_dequeue(filp); linux_get_fop(filp, &fop, &ldev); /* * Always use the real release function, if any, to avoid * leaking device resources: */ release = filp->f_op->release; if (release != NULL) error = -OPW(file, td, release(filp->f_vnode, filp)); funsetown(&filp->f_sigio); if (filp->f_vnode != NULL) vdrop(filp->f_vnode); linux_drop_fop(ldev); if (filp->f_cdev != NULL) linux_cdev_deref(filp->f_cdev); kfree(filp); return (error); } static int linux_file_ioctl(struct file *fp, u_long cmd, void *data, struct ucred *cred, struct thread *td) { struct linux_file *filp; const struct file_operations *fop; struct linux_cdev *ldev; struct fiodgname_arg *fgn; const char *p; int error, i; error = 0; filp = (struct linux_file *)fp->f_data; filp->f_flags = fp->f_flag; linux_get_fop(filp, &fop, &ldev); linux_set_current(td); switch (cmd) { case FIONBIO: break; case FIOASYNC: if (fop->fasync == NULL) break; error = -OPW(fp, td, fop->fasync(0, filp, fp->f_flag & FASYNC)); break; case FIOSETOWN: error = fsetown(*(int *)data, &filp->f_sigio); if (error == 0) { if (fop->fasync == NULL) break; error = -OPW(fp, td, fop->fasync(0, filp, fp->f_flag & FASYNC)); } break; case FIOGETOWN: *(int *)data = fgetown(&filp->f_sigio); break; case FIODGNAME: #ifdef COMPAT_FREEBSD32 case FIODGNAME_32: #endif if (filp->f_cdev == NULL || filp->f_cdev->cdev == NULL) { error = ENXIO; break; } fgn = data; p = devtoname(filp->f_cdev->cdev); i = strlen(p) + 1; if (i > fgn->len) { error = EINVAL; break; } error = copyout(p, fiodgname_buf_get_ptr(fgn, cmd), i); break; default: error = linux_file_ioctl_sub(fp, filp, fop, cmd, data, td); break; } linux_drop_fop(ldev); return (error); } static int linux_file_mmap_sub(struct thread *td, vm_size_t objsize, vm_prot_t prot, vm_prot_t *maxprotp, int *flagsp, struct file *fp, vm_ooffset_t *foff, const struct file_operations *fop, vm_object_t *objp) { /* * Character devices do not provide private mappings * of any kind: */ if ((*maxprotp & VM_PROT_WRITE) == 0 && (prot & VM_PROT_WRITE) != 0) return (EACCES); if ((*flagsp & (MAP_PRIVATE | MAP_COPY)) != 0) return (EINVAL); return (linux_file_mmap_single(fp, fop, foff, objsize, objp, (int)prot, td)); } static int linux_file_mmap(struct file *fp, vm_map_t map, vm_offset_t *addr, vm_size_t size, vm_prot_t prot, vm_prot_t cap_maxprot, int flags, vm_ooffset_t foff, struct thread *td) { struct linux_file *filp; const struct file_operations *fop; struct linux_cdev *ldev; struct mount *mp; struct vnode *vp; vm_object_t object; vm_prot_t maxprot; int error; filp = (struct linux_file *)fp->f_data; vp = filp->f_vnode; if (vp == NULL) return (EOPNOTSUPP); /* * Ensure that file and memory protections are * compatible. */ mp = vp->v_mount; if (mp != NULL && (mp->mnt_flag & MNT_NOEXEC) != 0) { maxprot = VM_PROT_NONE; if ((prot & VM_PROT_EXECUTE) != 0) return (EACCES); } else maxprot = VM_PROT_EXECUTE; if ((fp->f_flag & FREAD) != 0) maxprot |= VM_PROT_READ; else if ((prot & VM_PROT_READ) != 0) return (EACCES); /* * If we are sharing potential changes via MAP_SHARED and we * are trying to get write permission although we opened it * without asking for it, bail out. * * Note that most character devices always share mappings. * * Rely on linux_file_mmap_sub() to fail invalid MAP_PRIVATE * requests rather than doing it here. */ if ((flags & MAP_SHARED) != 0) { if ((fp->f_flag & FWRITE) != 0) maxprot |= VM_PROT_WRITE; else if ((prot & VM_PROT_WRITE) != 0) return (EACCES); } maxprot &= cap_maxprot; linux_get_fop(filp, &fop, &ldev); error = linux_file_mmap_sub(td, size, prot, &maxprot, &flags, fp, &foff, fop, &object); if (error != 0) goto out; error = vm_mmap_object(map, addr, size, prot, maxprot, flags, object, foff, FALSE, td); if (error != 0) vm_object_deallocate(object); out: linux_drop_fop(ldev); return (error); } static int linux_file_stat(struct file *fp, struct stat *sb, struct ucred *active_cred, struct thread *td) { struct linux_file *filp; struct vnode *vp; int error; filp = (struct linux_file *)fp->f_data; if (filp->f_vnode == NULL) return (EOPNOTSUPP); vp = filp->f_vnode; vn_lock(vp, LK_SHARED | LK_RETRY); - error = vn_stat(vp, sb, td->td_ucred, NOCRED, td); + error = VOP_STAT(vp, sb, td->td_ucred, NOCRED, td); VOP_UNLOCK(vp); return (error); } static int linux_file_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp) { struct linux_file *filp; struct vnode *vp; int error; filp = fp->f_data; vp = filp->f_vnode; if (vp == NULL) { error = 0; kif->kf_type = KF_TYPE_DEV; } else { vref(vp); FILEDESC_SUNLOCK(fdp); error = vn_fill_kinfo_vnode(vp, kif); vrele(vp); kif->kf_type = KF_TYPE_VNODE; FILEDESC_SLOCK(fdp); } return (error); } unsigned int linux_iminor(struct inode *inode) { struct linux_cdev *ldev; if (inode == NULL || inode->v_rdev == NULL || inode->v_rdev->si_devsw != &linuxcdevsw) return (-1U); ldev = inode->v_rdev->si_drv1; if (ldev == NULL) return (-1U); return (minor(ldev->dev)); } struct fileops linuxfileops = { .fo_read = linux_file_read, .fo_write = linux_file_write, .fo_truncate = invfo_truncate, .fo_kqfilter = linux_file_kqfilter, .fo_stat = linux_file_stat, .fo_fill_kinfo = linux_file_fill_kinfo, .fo_poll = linux_file_poll, .fo_close = linux_file_close, .fo_ioctl = linux_file_ioctl, .fo_mmap = linux_file_mmap, .fo_chmod = invfo_chmod, .fo_chown = invfo_chown, .fo_sendfile = invfo_sendfile, .fo_flags = DFLAG_PASSABLE, }; /* * Hash of vmmap addresses. This is infrequently accessed and does not * need to be particularly large. This is done because we must store the * caller's idea of the map size to properly unmap. */ struct vmmap { LIST_ENTRY(vmmap) vm_next; void *vm_addr; unsigned long vm_size; }; struct vmmaphd { struct vmmap *lh_first; }; #define VMMAP_HASH_SIZE 64 #define VMMAP_HASH_MASK (VMMAP_HASH_SIZE - 1) #define VM_HASH(addr) ((uintptr_t)(addr) >> PAGE_SHIFT) & VMMAP_HASH_MASK static struct vmmaphd vmmaphead[VMMAP_HASH_SIZE]; static struct mtx vmmaplock; static void vmmap_add(void *addr, unsigned long size) { struct vmmap *vmmap; vmmap = kmalloc(sizeof(*vmmap), GFP_KERNEL); mtx_lock(&vmmaplock); vmmap->vm_size = size; vmmap->vm_addr = addr; LIST_INSERT_HEAD(&vmmaphead[VM_HASH(addr)], vmmap, vm_next); mtx_unlock(&vmmaplock); } static struct vmmap * vmmap_remove(void *addr) { struct vmmap *vmmap; mtx_lock(&vmmaplock); LIST_FOREACH(vmmap, &vmmaphead[VM_HASH(addr)], vm_next) if (vmmap->vm_addr == addr) break; if (vmmap) LIST_REMOVE(vmmap, vm_next); mtx_unlock(&vmmaplock); return (vmmap); } #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) || defined(__aarch64__) void * _ioremap_attr(vm_paddr_t phys_addr, unsigned long size, int attr) { void *addr; addr = pmap_mapdev_attr(phys_addr, size, attr); if (addr == NULL) return (NULL); vmmap_add(addr, size); return (addr); } #endif void iounmap(void *addr) { struct vmmap *vmmap; vmmap = vmmap_remove(addr); if (vmmap == NULL) return; #if defined(__i386__) || defined(__amd64__) || defined(__powerpc__) || defined(__aarch64__) pmap_unmapdev((vm_offset_t)addr, vmmap->vm_size); #endif kfree(vmmap); } void * vmap(struct page **pages, unsigned int count, unsigned long flags, int prot) { vm_offset_t off; size_t size; size = count * PAGE_SIZE; off = kva_alloc(size); if (off == 0) return (NULL); vmmap_add((void *)off, size); pmap_qenter(off, pages, count); return ((void *)off); } void vunmap(void *addr) { struct vmmap *vmmap; vmmap = vmmap_remove(addr); if (vmmap == NULL) return; pmap_qremove((vm_offset_t)addr, vmmap->vm_size / PAGE_SIZE); kva_free((vm_offset_t)addr, vmmap->vm_size); kfree(vmmap); } char * kvasprintf(gfp_t gfp, const char *fmt, va_list ap) { unsigned int len; char *p; va_list aq; va_copy(aq, ap); len = vsnprintf(NULL, 0, fmt, aq); va_end(aq); p = kmalloc(len + 1, gfp); if (p != NULL) vsnprintf(p, len + 1, fmt, ap); return (p); } char * kasprintf(gfp_t gfp, const char *fmt, ...) { va_list ap; char *p; va_start(ap, fmt); p = kvasprintf(gfp, fmt, ap); va_end(ap); return (p); } static void linux_timer_callback_wrapper(void *context) { struct timer_list *timer; linux_set_current(curthread); timer = context; timer->function(timer->data); } int mod_timer(struct timer_list *timer, int expires) { int ret; timer->expires = expires; ret = callout_reset(&timer->callout, linux_timer_jiffies_until(expires), &linux_timer_callback_wrapper, timer); MPASS(ret == 0 || ret == 1); return (ret == 1); } void add_timer(struct timer_list *timer) { callout_reset(&timer->callout, linux_timer_jiffies_until(timer->expires), &linux_timer_callback_wrapper, timer); } void add_timer_on(struct timer_list *timer, int cpu) { callout_reset_on(&timer->callout, linux_timer_jiffies_until(timer->expires), &linux_timer_callback_wrapper, timer, cpu); } int del_timer(struct timer_list *timer) { if (callout_stop(&(timer)->callout) == -1) return (0); return (1); } int del_timer_sync(struct timer_list *timer) { if (callout_drain(&(timer)->callout) == -1) return (0); return (1); } /* greatest common divisor, Euclid equation */ static uint64_t lkpi_gcd_64(uint64_t a, uint64_t b) { uint64_t an; uint64_t bn; while (b != 0) { an = b; bn = a % b; a = an; b = bn; } return (a); } uint64_t lkpi_nsec2hz_rem; uint64_t lkpi_nsec2hz_div = 1000000000ULL; uint64_t lkpi_nsec2hz_max; uint64_t lkpi_usec2hz_rem; uint64_t lkpi_usec2hz_div = 1000000ULL; uint64_t lkpi_usec2hz_max; uint64_t lkpi_msec2hz_rem; uint64_t lkpi_msec2hz_div = 1000ULL; uint64_t lkpi_msec2hz_max; static void linux_timer_init(void *arg) { uint64_t gcd; /* * Compute an internal HZ value which can divide 2**32 to * avoid timer rounding problems when the tick value wraps * around 2**32: */ linux_timer_hz_mask = 1; while (linux_timer_hz_mask < (unsigned long)hz) linux_timer_hz_mask *= 2; linux_timer_hz_mask--; /* compute some internal constants */ lkpi_nsec2hz_rem = hz; lkpi_usec2hz_rem = hz; lkpi_msec2hz_rem = hz; gcd = lkpi_gcd_64(lkpi_nsec2hz_rem, lkpi_nsec2hz_div); lkpi_nsec2hz_rem /= gcd; lkpi_nsec2hz_div /= gcd; lkpi_nsec2hz_max = -1ULL / lkpi_nsec2hz_rem; gcd = lkpi_gcd_64(lkpi_usec2hz_rem, lkpi_usec2hz_div); lkpi_usec2hz_rem /= gcd; lkpi_usec2hz_div /= gcd; lkpi_usec2hz_max = -1ULL / lkpi_usec2hz_rem; gcd = lkpi_gcd_64(lkpi_msec2hz_rem, lkpi_msec2hz_div); lkpi_msec2hz_rem /= gcd; lkpi_msec2hz_div /= gcd; lkpi_msec2hz_max = -1ULL / lkpi_msec2hz_rem; } SYSINIT(linux_timer, SI_SUB_DRIVERS, SI_ORDER_FIRST, linux_timer_init, NULL); void linux_complete_common(struct completion *c, int all) { int wakeup_swapper; sleepq_lock(c); if (all) { c->done = UINT_MAX; wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0); } else { if (c->done != UINT_MAX) c->done++; wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0); } sleepq_release(c); if (wakeup_swapper) kick_proc0(); } /* * Indefinite wait for done != 0 with or without signals. */ int linux_wait_for_common(struct completion *c, int flags) { struct task_struct *task; int error; if (SCHEDULER_STOPPED()) return (0); task = current; if (flags != 0) flags = SLEEPQ_INTERRUPTIBLE | SLEEPQ_SLEEP; else flags = SLEEPQ_SLEEP; error = 0; for (;;) { sleepq_lock(c); if (c->done) break; sleepq_add(c, NULL, "completion", flags, 0); if (flags & SLEEPQ_INTERRUPTIBLE) { DROP_GIANT(); error = -sleepq_wait_sig(c, 0); PICKUP_GIANT(); if (error != 0) { linux_schedule_save_interrupt_value(task, error); error = -ERESTARTSYS; goto intr; } } else { DROP_GIANT(); sleepq_wait(c, 0); PICKUP_GIANT(); } } if (c->done != UINT_MAX) c->done--; sleepq_release(c); intr: return (error); } /* * Time limited wait for done != 0 with or without signals. */ int linux_wait_for_timeout_common(struct completion *c, int timeout, int flags) { struct task_struct *task; int end = jiffies + timeout; int error; if (SCHEDULER_STOPPED()) return (0); task = current; if (flags != 0) flags = SLEEPQ_INTERRUPTIBLE | SLEEPQ_SLEEP; else flags = SLEEPQ_SLEEP; for (;;) { sleepq_lock(c); if (c->done) break; sleepq_add(c, NULL, "completion", flags, 0); sleepq_set_timeout(c, linux_timer_jiffies_until(end)); DROP_GIANT(); if (flags & SLEEPQ_INTERRUPTIBLE) error = -sleepq_timedwait_sig(c, 0); else error = -sleepq_timedwait(c, 0); PICKUP_GIANT(); if (error != 0) { /* check for timeout */ if (error == -EWOULDBLOCK) { error = 0; /* timeout */ } else { /* signal happened */ linux_schedule_save_interrupt_value(task, error); error = -ERESTARTSYS; } goto done; } } if (c->done != UINT_MAX) c->done--; sleepq_release(c); /* return how many jiffies are left */ error = linux_timer_jiffies_until(end); done: return (error); } int linux_try_wait_for_completion(struct completion *c) { int isdone; sleepq_lock(c); isdone = (c->done != 0); if (c->done != 0 && c->done != UINT_MAX) c->done--; sleepq_release(c); return (isdone); } int linux_completion_done(struct completion *c) { int isdone; sleepq_lock(c); isdone = (c->done != 0); sleepq_release(c); return (isdone); } static void linux_cdev_deref(struct linux_cdev *ldev) { if (refcount_release(&ldev->refs)) kfree(ldev); } static void linux_cdev_release(struct kobject *kobj) { struct linux_cdev *cdev; struct kobject *parent; cdev = container_of(kobj, struct linux_cdev, kobj); parent = kobj->parent; linux_destroy_dev(cdev); linux_cdev_deref(cdev); kobject_put(parent); } static void linux_cdev_static_release(struct kobject *kobj) { struct linux_cdev *cdev; struct kobject *parent; cdev = container_of(kobj, struct linux_cdev, kobj); parent = kobj->parent; linux_destroy_dev(cdev); kobject_put(parent); } void linux_destroy_dev(struct linux_cdev *ldev) { if (ldev->cdev == NULL) return; MPASS((ldev->siref & LDEV_SI_DTR) == 0); atomic_set_int(&ldev->siref, LDEV_SI_DTR); while ((atomic_load_int(&ldev->siref) & ~LDEV_SI_DTR) != 0) pause("ldevdtr", hz / 4); destroy_dev(ldev->cdev); ldev->cdev = NULL; } const struct kobj_type linux_cdev_ktype = { .release = linux_cdev_release, }; const struct kobj_type linux_cdev_static_ktype = { .release = linux_cdev_static_release, }; static void linux_handle_ifnet_link_event(void *arg, struct ifnet *ifp, int linkstate) { struct notifier_block *nb; nb = arg; if (linkstate == LINK_STATE_UP) nb->notifier_call(nb, NETDEV_UP, ifp); else nb->notifier_call(nb, NETDEV_DOWN, ifp); } static void linux_handle_ifnet_arrival_event(void *arg, struct ifnet *ifp) { struct notifier_block *nb; nb = arg; nb->notifier_call(nb, NETDEV_REGISTER, ifp); } static void linux_handle_ifnet_departure_event(void *arg, struct ifnet *ifp) { struct notifier_block *nb; nb = arg; nb->notifier_call(nb, NETDEV_UNREGISTER, ifp); } static void linux_handle_iflladdr_event(void *arg, struct ifnet *ifp) { struct notifier_block *nb; nb = arg; nb->notifier_call(nb, NETDEV_CHANGEADDR, ifp); } static void linux_handle_ifaddr_event(void *arg, struct ifnet *ifp) { struct notifier_block *nb; nb = arg; nb->notifier_call(nb, NETDEV_CHANGEIFADDR, ifp); } int register_netdevice_notifier(struct notifier_block *nb) { nb->tags[NETDEV_UP] = EVENTHANDLER_REGISTER( ifnet_link_event, linux_handle_ifnet_link_event, nb, 0); nb->tags[NETDEV_REGISTER] = EVENTHANDLER_REGISTER( ifnet_arrival_event, linux_handle_ifnet_arrival_event, nb, 0); nb->tags[NETDEV_UNREGISTER] = EVENTHANDLER_REGISTER( ifnet_departure_event, linux_handle_ifnet_departure_event, nb, 0); nb->tags[NETDEV_CHANGEADDR] = EVENTHANDLER_REGISTER( iflladdr_event, linux_handle_iflladdr_event, nb, 0); return (0); } int register_inetaddr_notifier(struct notifier_block *nb) { nb->tags[NETDEV_CHANGEIFADDR] = EVENTHANDLER_REGISTER( ifaddr_event, linux_handle_ifaddr_event, nb, 0); return (0); } int unregister_netdevice_notifier(struct notifier_block *nb) { EVENTHANDLER_DEREGISTER(ifnet_link_event, nb->tags[NETDEV_UP]); EVENTHANDLER_DEREGISTER(ifnet_arrival_event, nb->tags[NETDEV_REGISTER]); EVENTHANDLER_DEREGISTER(ifnet_departure_event, nb->tags[NETDEV_UNREGISTER]); EVENTHANDLER_DEREGISTER(iflladdr_event, nb->tags[NETDEV_CHANGEADDR]); return (0); } int unregister_inetaddr_notifier(struct notifier_block *nb) { EVENTHANDLER_DEREGISTER(ifaddr_event, nb->tags[NETDEV_CHANGEIFADDR]); return (0); } struct list_sort_thunk { int (*cmp)(void *, struct list_head *, struct list_head *); void *priv; }; static inline int linux_le_cmp(void *priv, const void *d1, const void *d2) { struct list_head *le1, *le2; struct list_sort_thunk *thunk; thunk = priv; le1 = *(__DECONST(struct list_head **, d1)); le2 = *(__DECONST(struct list_head **, d2)); return ((thunk->cmp)(thunk->priv, le1, le2)); } void list_sort(void *priv, struct list_head *head, int (*cmp)(void *priv, struct list_head *a, struct list_head *b)) { struct list_sort_thunk thunk; struct list_head **ar, *le; size_t count, i; count = 0; list_for_each(le, head) count++; ar = malloc(sizeof(struct list_head *) * count, M_KMALLOC, M_WAITOK); i = 0; list_for_each(le, head) ar[i++] = le; thunk.cmp = cmp; thunk.priv = priv; qsort_r(ar, count, sizeof(struct list_head *), &thunk, linux_le_cmp); INIT_LIST_HEAD(head); for (i = 0; i < count; i++) list_add_tail(ar[i], head); free(ar, M_KMALLOC); } void linux_irq_handler(void *ent) { struct irq_ent *irqe; linux_set_current(curthread); irqe = ent; irqe->handler(irqe->irq, irqe->arg); } #if defined(__i386__) || defined(__amd64__) int linux_wbinvd_on_all_cpus(void) { pmap_invalidate_cache(); return (0); } #endif int linux_on_each_cpu(void callback(void *), void *data) { smp_rendezvous(smp_no_rendezvous_barrier, callback, smp_no_rendezvous_barrier, data); return (0); } int linux_in_atomic(void) { return ((curthread->td_pflags & TDP_NOFAULTING) != 0); } struct linux_cdev * linux_find_cdev(const char *name, unsigned major, unsigned minor) { dev_t dev = MKDEV(major, minor); struct cdev *cdev; dev_lock(); LIST_FOREACH(cdev, &linuxcdevsw.d_devs, si_list) { struct linux_cdev *ldev = cdev->si_drv1; if (ldev->dev == dev && strcmp(kobject_name(&ldev->kobj), name) == 0) { break; } } dev_unlock(); return (cdev != NULL ? cdev->si_drv1 : NULL); } int __register_chrdev(unsigned int major, unsigned int baseminor, unsigned int count, const char *name, const struct file_operations *fops) { struct linux_cdev *cdev; int ret = 0; int i; for (i = baseminor; i < baseminor + count; i++) { cdev = cdev_alloc(); cdev->ops = fops; kobject_set_name(&cdev->kobj, name); ret = cdev_add(cdev, makedev(major, i), 1); if (ret != 0) break; } return (ret); } int __register_chrdev_p(unsigned int major, unsigned int baseminor, unsigned int count, const char *name, const struct file_operations *fops, uid_t uid, gid_t gid, int mode) { struct linux_cdev *cdev; int ret = 0; int i; for (i = baseminor; i < baseminor + count; i++) { cdev = cdev_alloc(); cdev->ops = fops; kobject_set_name(&cdev->kobj, name); ret = cdev_add_ext(cdev, makedev(major, i), uid, gid, mode); if (ret != 0) break; } return (ret); } void __unregister_chrdev(unsigned int major, unsigned int baseminor, unsigned int count, const char *name) { struct linux_cdev *cdevp; int i; for (i = baseminor; i < baseminor + count; i++) { cdevp = linux_find_cdev(name, major, i); if (cdevp != NULL) cdev_del(cdevp); } } void linux_dump_stack(void) { #ifdef STACK struct stack st; stack_zero(&st); stack_save(&st); stack_print(&st); #endif } #if defined(__i386__) || defined(__amd64__) bool linux_cpu_has_clflush; #endif static void linux_compat_init(void *arg) { struct sysctl_oid *rootoid; int i; #if defined(__i386__) || defined(__amd64__) linux_cpu_has_clflush = (cpu_feature & CPUID_CLFSH); #endif rw_init(&linux_vma_lock, "lkpi-vma-lock"); rootoid = SYSCTL_ADD_ROOT_NODE(NULL, OID_AUTO, "sys", CTLFLAG_RD|CTLFLAG_MPSAFE, NULL, "sys"); kobject_init(&linux_class_root, &linux_class_ktype); kobject_set_name(&linux_class_root, "class"); linux_class_root.oidp = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(rootoid), OID_AUTO, "class", CTLFLAG_RD|CTLFLAG_MPSAFE, NULL, "class"); kobject_init(&linux_root_device.kobj, &linux_dev_ktype); kobject_set_name(&linux_root_device.kobj, "device"); linux_root_device.kobj.oidp = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(rootoid), OID_AUTO, "device", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "device"); linux_root_device.bsddev = root_bus; linux_class_misc.name = "misc"; class_register(&linux_class_misc); INIT_LIST_HEAD(&pci_drivers); INIT_LIST_HEAD(&pci_devices); spin_lock_init(&pci_lock); mtx_init(&vmmaplock, "IO Map lock", NULL, MTX_DEF); for (i = 0; i < VMMAP_HASH_SIZE; i++) LIST_INIT(&vmmaphead[i]); } SYSINIT(linux_compat, SI_SUB_DRIVERS, SI_ORDER_SECOND, linux_compat_init, NULL); static void linux_compat_uninit(void *arg) { linux_kobject_kfree_name(&linux_class_root); linux_kobject_kfree_name(&linux_root_device.kobj); linux_kobject_kfree_name(&linux_class_misc.kobj); mtx_destroy(&vmmaplock); spin_lock_destroy(&pci_lock); rw_destroy(&linux_vma_lock); } SYSUNINIT(linux_compat, SI_SUB_DRIVERS, SI_ORDER_SECOND, linux_compat_uninit, NULL); /* * NOTE: Linux frequently uses "unsigned long" for pointer to integer * conversion and vice versa, where in FreeBSD "uintptr_t" would be * used. Assert these types have the same size, else some parts of the * LinuxKPI may not work like expected: */ CTASSERT(sizeof(unsigned long) == sizeof(uintptr_t)); diff --git a/sys/fs/tmpfs/tmpfs_vnops.c b/sys/fs/tmpfs/tmpfs_vnops.c index 0e414a46c701..5d4606c3ed6b 100644 --- a/sys/fs/tmpfs/tmpfs_vnops.c +++ b/sys/fs/tmpfs/tmpfs_vnops.c @@ -1,1713 +1,1762 @@ /* $NetBSD: tmpfs_vnops.c,v 1.39 2007/07/23 15:41:01 jmmv Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause-NetBSD * * Copyright (c) 2005, 2006 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Julio M. Merino Vidal, developed as part of Google's Summer of Code * 2005 program. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * tmpfs vnode interface. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include +#include +#include #include #include #include #include #include SYSCTL_DECL(_vfs_tmpfs); VFS_SMR_DECLARE; static volatile int tmpfs_rename_restarts; SYSCTL_INT(_vfs_tmpfs, OID_AUTO, rename_restarts, CTLFLAG_RD, __DEVOLATILE(int *, &tmpfs_rename_restarts), 0, "Times rename had to restart due to lock contention"); static int tmpfs_vn_get_ino_alloc(struct mount *mp, void *arg, int lkflags, struct vnode **rvp) { return (tmpfs_alloc_vp(mp, arg, lkflags, rvp)); } static int tmpfs_lookup1(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp) { struct tmpfs_dirent *de; struct tmpfs_node *dnode, *pnode; struct tmpfs_mount *tm; int error; dnode = VP_TO_TMPFS_DIR(dvp); *vpp = NULLVP; /* Check accessibility of requested node as a first step. */ error = vn_dir_check_exec(dvp, cnp); if (error != 0) goto out; /* We cannot be requesting the parent directory of the root node. */ MPASS(IMPLIES(dnode->tn_type == VDIR && dnode->tn_dir.tn_parent == dnode, !(cnp->cn_flags & ISDOTDOT))); TMPFS_ASSERT_LOCKED(dnode); if (dnode->tn_dir.tn_parent == NULL) { error = ENOENT; goto out; } if (cnp->cn_flags & ISDOTDOT) { tm = VFS_TO_TMPFS(dvp->v_mount); pnode = dnode->tn_dir.tn_parent; tmpfs_ref_node(pnode); error = vn_vget_ino_gen(dvp, tmpfs_vn_get_ino_alloc, pnode, cnp->cn_lkflags, vpp); tmpfs_free_node(tm, pnode); if (error != 0) goto out; } else if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') { VREF(dvp); *vpp = dvp; error = 0; } else { de = tmpfs_dir_lookup(dnode, NULL, cnp); if (de != NULL && de->td_node == NULL) cnp->cn_flags |= ISWHITEOUT; if (de == NULL || de->td_node == NULL) { /* * The entry was not found in the directory. * This is OK if we are creating or renaming an * entry and are working on the last component of * the path name. */ if ((cnp->cn_flags & ISLASTCN) && (cnp->cn_nameiop == CREATE || \ cnp->cn_nameiop == RENAME || (cnp->cn_nameiop == DELETE && cnp->cn_flags & DOWHITEOUT && cnp->cn_flags & ISWHITEOUT))) { error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, cnp->cn_thread); if (error != 0) goto out; /* * Keep the component name in the buffer for * future uses. */ cnp->cn_flags |= SAVENAME; error = EJUSTRETURN; } else error = ENOENT; } else { struct tmpfs_node *tnode; /* * The entry was found, so get its associated * tmpfs_node. */ tnode = de->td_node; /* * If we are not at the last path component and * found a non-directory or non-link entry (which * may itself be pointing to a directory), raise * an error. */ if ((tnode->tn_type != VDIR && tnode->tn_type != VLNK) && !(cnp->cn_flags & ISLASTCN)) { error = ENOTDIR; goto out; } /* * If we are deleting or renaming the entry, keep * track of its tmpfs_dirent so that it can be * easily deleted later. */ if ((cnp->cn_flags & ISLASTCN) && (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME)) { error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, cnp->cn_thread); if (error != 0) goto out; /* Allocate a new vnode on the matching entry. */ error = tmpfs_alloc_vp(dvp->v_mount, tnode, cnp->cn_lkflags, vpp); if (error != 0) goto out; if ((dnode->tn_mode & S_ISTXT) && VOP_ACCESS(dvp, VADMIN, cnp->cn_cred, cnp->cn_thread) && VOP_ACCESS(*vpp, VADMIN, cnp->cn_cred, cnp->cn_thread)) { error = EPERM; vput(*vpp); *vpp = NULL; goto out; } cnp->cn_flags |= SAVENAME; } else { error = tmpfs_alloc_vp(dvp->v_mount, tnode, cnp->cn_lkflags, vpp); if (error != 0) goto out; } } } /* * Store the result of this lookup in the cache. Avoid this if the * request was for creation, as it does not improve timings on * emprical tests. */ if ((cnp->cn_flags & MAKEENTRY) != 0 && tmpfs_use_nc(dvp)) cache_enter(dvp, *vpp, cnp); out: /* * If there were no errors, *vpp cannot be null and it must be * locked. */ MPASS(IFF(error == 0, *vpp != NULLVP && VOP_ISLOCKED(*vpp))); return (error); } static int tmpfs_cached_lookup(struct vop_cachedlookup_args *v) { return (tmpfs_lookup1(v->a_dvp, v->a_vpp, v->a_cnp)); } static int tmpfs_lookup(struct vop_lookup_args *v) { return (tmpfs_lookup1(v->a_dvp, v->a_vpp, v->a_cnp)); } static int tmpfs_create(struct vop_create_args *v) { struct vnode *dvp = v->a_dvp; struct vnode **vpp = v->a_vpp; struct componentname *cnp = v->a_cnp; struct vattr *vap = v->a_vap; int error; MPASS(vap->va_type == VREG || vap->va_type == VSOCK); error = tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); if (error == 0 && (cnp->cn_flags & MAKEENTRY) != 0 && tmpfs_use_nc(dvp)) cache_enter(dvp, *vpp, cnp); return (error); } static int tmpfs_mknod(struct vop_mknod_args *v) { struct vnode *dvp = v->a_dvp; struct vnode **vpp = v->a_vpp; struct componentname *cnp = v->a_cnp; struct vattr *vap = v->a_vap; if (vap->va_type != VBLK && vap->va_type != VCHR && vap->va_type != VFIFO) return EINVAL; return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); } static int tmpfs_open(struct vop_open_args *v) { struct vnode *vp = v->a_vp; int mode = v->a_mode; int error; struct tmpfs_node *node; MPASS(VOP_ISLOCKED(vp)); node = VP_TO_TMPFS_NODE(vp); /* The file is still active but all its names have been removed * (e.g. by a "rmdir $(pwd)"). It cannot be opened any more as * it is about to die. */ if (node->tn_links < 1) return (ENOENT); /* If the file is marked append-only, deny write requests. */ if (node->tn_flags & APPEND && (mode & (FWRITE | O_APPEND)) == FWRITE) error = EPERM; else { error = 0; /* For regular files, the call below is nop. */ KASSERT(vp->v_type != VREG || (node->tn_reg.tn_aobj->flags & OBJ_DEAD) == 0, ("dead object")); vnode_create_vobject(vp, node->tn_size, v->a_td); } MPASS(VOP_ISLOCKED(vp)); return error; } static int tmpfs_close(struct vop_close_args *v) { struct vnode *vp = v->a_vp; /* Update node times. */ tmpfs_update(vp); return (0); } /* * VOP_FPLOOKUP_VEXEC routines are subject to special circumstances, see * the comment above cache_fplookup for details. */ int tmpfs_fplookup_vexec(struct vop_fplookup_vexec_args *v) { struct vnode *vp; struct tmpfs_node *node; struct ucred *cred; mode_t all_x, mode; vp = v->a_vp; node = VP_TO_TMPFS_NODE_SMR(vp); if (__predict_false(node == NULL)) return (EAGAIN); all_x = S_IXUSR | S_IXGRP | S_IXOTH; mode = atomic_load_short(&node->tn_mode); if (__predict_true((mode & all_x) == all_x)) return (0); cred = v->a_cred; return (vaccess_vexec_smr(mode, node->tn_uid, node->tn_gid, cred)); } int tmpfs_access(struct vop_access_args *v) { struct vnode *vp = v->a_vp; accmode_t accmode = v->a_accmode; struct ucred *cred = v->a_cred; mode_t all_x = S_IXUSR | S_IXGRP | S_IXOTH; int error; struct tmpfs_node *node; MPASS(VOP_ISLOCKED(vp)); node = VP_TO_TMPFS_NODE(vp); /* * Common case path lookup. */ if (__predict_true(accmode == VEXEC && (node->tn_mode & all_x) == all_x)) return (0); switch (vp->v_type) { case VDIR: /* FALLTHROUGH */ case VLNK: /* FALLTHROUGH */ case VREG: if (accmode & VWRITE && vp->v_mount->mnt_flag & MNT_RDONLY) { error = EROFS; goto out; } break; case VBLK: /* FALLTHROUGH */ case VCHR: /* FALLTHROUGH */ case VSOCK: /* FALLTHROUGH */ case VFIFO: break; default: error = EINVAL; goto out; } if (accmode & VWRITE && node->tn_flags & IMMUTABLE) { error = EPERM; goto out; } error = vaccess(vp->v_type, node->tn_mode, node->tn_uid, node->tn_gid, accmode, cred); out: MPASS(VOP_ISLOCKED(vp)); return error; } +int +tmpfs_stat(struct vop_stat_args *v) +{ + struct vnode *vp = v->a_vp; + struct stat *sb = v->a_sb; + vm_object_t obj; + struct tmpfs_node *node; + int error; + + node = VP_TO_TMPFS_NODE(vp); + + tmpfs_update_getattr(vp); + + error = vop_stat_helper_pre(v); + if (__predict_false(error)) + return (error); + + sb->st_dev = vp->v_mount->mnt_stat.f_fsid.val[0]; + sb->st_ino = node->tn_id; + sb->st_mode = node->tn_mode | VTTOIF(vp->v_type); + sb->st_nlink = node->tn_links; + sb->st_uid = node->tn_uid; + sb->st_gid = node->tn_gid; + sb->st_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? + node->tn_rdev : NODEV; + sb->st_size = node->tn_size; + sb->st_atim.tv_sec = node->tn_atime.tv_sec; + sb->st_atim.tv_nsec = node->tn_atime.tv_nsec; + sb->st_mtim.tv_sec = node->tn_mtime.tv_sec; + sb->st_mtim.tv_nsec = node->tn_mtime.tv_nsec; + sb->st_ctim.tv_sec = node->tn_ctime.tv_sec; + sb->st_ctim.tv_nsec = node->tn_ctime.tv_nsec; + sb->st_birthtim.tv_sec = node->tn_birthtime.tv_sec; + sb->st_birthtim.tv_nsec = node->tn_birthtime.tv_nsec; + sb->st_blksize = PAGE_SIZE; + sb->st_flags = node->tn_flags; + sb->st_gen = node->tn_gen; + if (vp->v_type == VREG) { + obj = node->tn_reg.tn_aobj; + sb->st_blocks = (u_quad_t)obj->resident_page_count * PAGE_SIZE; + } else + sb->st_blocks = node->tn_size; + sb->st_blocks /= S_BLKSIZE; + return (vop_stat_helper_post(v, error)); +} + int tmpfs_getattr(struct vop_getattr_args *v) { struct vnode *vp = v->a_vp; struct vattr *vap = v->a_vap; vm_object_t obj; struct tmpfs_node *node; node = VP_TO_TMPFS_NODE(vp); tmpfs_update_getattr(vp); vap->va_type = vp->v_type; vap->va_mode = node->tn_mode; vap->va_nlink = node->tn_links; vap->va_uid = node->tn_uid; vap->va_gid = node->tn_gid; vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; vap->va_fileid = node->tn_id; vap->va_size = node->tn_size; vap->va_blocksize = PAGE_SIZE; vap->va_atime = node->tn_atime; vap->va_mtime = node->tn_mtime; vap->va_ctime = node->tn_ctime; vap->va_birthtime = node->tn_birthtime; vap->va_gen = node->tn_gen; vap->va_flags = node->tn_flags; vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ? node->tn_rdev : NODEV; if (vp->v_type == VREG) { obj = node->tn_reg.tn_aobj; vap->va_bytes = (u_quad_t)obj->resident_page_count * PAGE_SIZE; } else vap->va_bytes = node->tn_size; vap->va_filerev = 0; return 0; } int tmpfs_setattr(struct vop_setattr_args *v) { struct vnode *vp = v->a_vp; struct vattr *vap = v->a_vap; struct ucred *cred = v->a_cred; struct thread *td = curthread; int error; MPASS(VOP_ISLOCKED(vp)); ASSERT_VOP_IN_SEQC(vp); error = 0; /* Abort if any unsettable attribute is given. */ if (vap->va_type != VNON || vap->va_nlink != VNOVAL || vap->va_fsid != VNOVAL || vap->va_fileid != VNOVAL || vap->va_blocksize != VNOVAL || vap->va_gen != VNOVAL || vap->va_rdev != VNOVAL || vap->va_bytes != VNOVAL) error = EINVAL; if (error == 0 && (vap->va_flags != VNOVAL)) error = tmpfs_chflags(vp, vap->va_flags, cred, td); if (error == 0 && (vap->va_size != VNOVAL)) error = tmpfs_chsize(vp, vap->va_size, cred, td); if (error == 0 && (vap->va_uid != VNOVAL || vap->va_gid != VNOVAL)) error = tmpfs_chown(vp, vap->va_uid, vap->va_gid, cred, td); if (error == 0 && (vap->va_mode != (mode_t)VNOVAL)) error = tmpfs_chmod(vp, vap->va_mode, cred, td); if (error == 0 && ((vap->va_atime.tv_sec != VNOVAL && vap->va_atime.tv_nsec != VNOVAL) || (vap->va_mtime.tv_sec != VNOVAL && vap->va_mtime.tv_nsec != VNOVAL) || (vap->va_birthtime.tv_sec != VNOVAL && vap->va_birthtime.tv_nsec != VNOVAL))) error = tmpfs_chtimes(vp, vap, cred, td); /* Update the node times. We give preference to the error codes * generated by this function rather than the ones that may arise * from tmpfs_update. */ tmpfs_update(vp); MPASS(VOP_ISLOCKED(vp)); return error; } static int tmpfs_read(struct vop_read_args *v) { struct vnode *vp; struct uio *uio; struct tmpfs_node *node; vp = v->a_vp; if (vp->v_type != VREG) return (EISDIR); uio = v->a_uio; if (uio->uio_offset < 0) return (EINVAL); node = VP_TO_TMPFS_NODE(vp); tmpfs_set_status(VFS_TO_TMPFS(vp->v_mount), node, TMPFS_NODE_ACCESSED); return (uiomove_object(node->tn_reg.tn_aobj, node->tn_size, uio)); } static int tmpfs_write(struct vop_write_args *v) { struct vnode *vp; struct uio *uio; struct tmpfs_node *node; off_t oldsize; int error, ioflag; mode_t newmode; vp = v->a_vp; uio = v->a_uio; ioflag = v->a_ioflag; error = 0; node = VP_TO_TMPFS_NODE(vp); oldsize = node->tn_size; if (uio->uio_offset < 0 || vp->v_type != VREG) return (EINVAL); if (uio->uio_resid == 0) return (0); if (ioflag & IO_APPEND) uio->uio_offset = node->tn_size; if (uio->uio_offset + uio->uio_resid > VFS_TO_TMPFS(vp->v_mount)->tm_maxfilesize) return (EFBIG); if (vn_rlimit_fsize(vp, uio, uio->uio_td)) return (EFBIG); if (uio->uio_offset + uio->uio_resid > node->tn_size) { error = tmpfs_reg_resize(vp, uio->uio_offset + uio->uio_resid, FALSE); if (error != 0) goto out; } error = uiomove_object(node->tn_reg.tn_aobj, node->tn_size, uio); node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_MODIFIED | TMPFS_NODE_CHANGED; if (node->tn_mode & (S_ISUID | S_ISGID)) { if (priv_check_cred(v->a_cred, PRIV_VFS_RETAINSUGID)) { newmode = node->tn_mode & ~(S_ISUID | S_ISGID); vn_seqc_write_begin(vp); atomic_store_short(&node->tn_mode, newmode); vn_seqc_write_end(vp); } } if (error != 0) (void)tmpfs_reg_resize(vp, oldsize, TRUE); out: MPASS(IMPLIES(error == 0, uio->uio_resid == 0)); MPASS(IMPLIES(error != 0, oldsize == node->tn_size)); return (error); } static int tmpfs_fsync(struct vop_fsync_args *v) { struct vnode *vp = v->a_vp; MPASS(VOP_ISLOCKED(vp)); tmpfs_check_mtime(vp); tmpfs_update(vp); return 0; } static int tmpfs_remove(struct vop_remove_args *v) { struct vnode *dvp = v->a_dvp; struct vnode *vp = v->a_vp; int error; struct tmpfs_dirent *de; struct tmpfs_mount *tmp; struct tmpfs_node *dnode; struct tmpfs_node *node; MPASS(VOP_ISLOCKED(dvp)); MPASS(VOP_ISLOCKED(vp)); if (vp->v_type == VDIR) { error = EISDIR; goto out; } dnode = VP_TO_TMPFS_DIR(dvp); node = VP_TO_TMPFS_NODE(vp); tmp = VFS_TO_TMPFS(vp->v_mount); de = tmpfs_dir_lookup(dnode, node, v->a_cnp); MPASS(de != NULL); /* Files marked as immutable or append-only cannot be deleted. */ if ((node->tn_flags & (IMMUTABLE | APPEND | NOUNLINK)) || (dnode->tn_flags & APPEND)) { error = EPERM; goto out; } /* Remove the entry from the directory; as it is a file, we do not * have to change the number of hard links of the directory. */ tmpfs_dir_detach(dvp, de); if (v->a_cnp->cn_flags & DOWHITEOUT) tmpfs_dir_whiteout_add(dvp, v->a_cnp); /* Free the directory entry we just deleted. Note that the node * referred by it will not be removed until the vnode is really * reclaimed. */ tmpfs_free_dirent(tmp, de); node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED; error = 0; out: return error; } static int tmpfs_link(struct vop_link_args *v) { struct vnode *dvp = v->a_tdvp; struct vnode *vp = v->a_vp; struct componentname *cnp = v->a_cnp; int error; struct tmpfs_dirent *de; struct tmpfs_node *node; MPASS(VOP_ISLOCKED(dvp)); MPASS(cnp->cn_flags & HASBUF); MPASS(dvp != vp); /* XXX When can this be false? */ node = VP_TO_TMPFS_NODE(vp); /* Ensure that we do not overflow the maximum number of links imposed * by the system. */ MPASS(node->tn_links <= TMPFS_LINK_MAX); if (node->tn_links == TMPFS_LINK_MAX) { error = EMLINK; goto out; } /* We cannot create links of files marked immutable or append-only. */ if (node->tn_flags & (IMMUTABLE | APPEND)) { error = EPERM; goto out; } /* Allocate a new directory entry to represent the node. */ error = tmpfs_alloc_dirent(VFS_TO_TMPFS(vp->v_mount), node, cnp->cn_nameptr, cnp->cn_namelen, &de); if (error != 0) goto out; /* Insert the new directory entry into the appropriate directory. */ if (cnp->cn_flags & ISWHITEOUT) tmpfs_dir_whiteout_remove(dvp, cnp); tmpfs_dir_attach(dvp, de); /* vp link count has changed, so update node times. */ node->tn_status |= TMPFS_NODE_CHANGED; tmpfs_update(vp); error = 0; out: return error; } /* * We acquire all but fdvp locks using non-blocking acquisitions. If we * fail to acquire any lock in the path we will drop all held locks, * acquire the new lock in a blocking fashion, and then release it and * restart the rename. This acquire/release step ensures that we do not * spin on a lock waiting for release. On error release all vnode locks * and decrement references the way tmpfs_rename() would do. */ static int tmpfs_rename_relock(struct vnode *fdvp, struct vnode **fvpp, struct vnode *tdvp, struct vnode **tvpp, struct componentname *fcnp, struct componentname *tcnp) { struct vnode *nvp; struct mount *mp; struct tmpfs_dirent *de; int error, restarts = 0; VOP_UNLOCK(tdvp); if (*tvpp != NULL && *tvpp != tdvp) VOP_UNLOCK(*tvpp); mp = fdvp->v_mount; relock: restarts += 1; error = vn_lock(fdvp, LK_EXCLUSIVE); if (error) goto releout; if (vn_lock(tdvp, LK_EXCLUSIVE | LK_NOWAIT) != 0) { VOP_UNLOCK(fdvp); error = vn_lock(tdvp, LK_EXCLUSIVE); if (error) goto releout; VOP_UNLOCK(tdvp); goto relock; } /* * Re-resolve fvp to be certain it still exists and fetch the * correct vnode. */ de = tmpfs_dir_lookup(VP_TO_TMPFS_DIR(fdvp), NULL, fcnp); if (de == NULL) { VOP_UNLOCK(fdvp); VOP_UNLOCK(tdvp); if ((fcnp->cn_flags & ISDOTDOT) != 0 || (fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.')) error = EINVAL; else error = ENOENT; goto releout; } error = tmpfs_alloc_vp(mp, de->td_node, LK_EXCLUSIVE | LK_NOWAIT, &nvp); if (error != 0) { VOP_UNLOCK(fdvp); VOP_UNLOCK(tdvp); if (error != EBUSY) goto releout; error = tmpfs_alloc_vp(mp, de->td_node, LK_EXCLUSIVE, &nvp); if (error != 0) goto releout; VOP_UNLOCK(nvp); /* * Concurrent rename race. */ if (nvp == tdvp) { vrele(nvp); error = EINVAL; goto releout; } vrele(*fvpp); *fvpp = nvp; goto relock; } vrele(*fvpp); *fvpp = nvp; VOP_UNLOCK(*fvpp); /* * Re-resolve tvp and acquire the vnode lock if present. */ de = tmpfs_dir_lookup(VP_TO_TMPFS_DIR(tdvp), NULL, tcnp); /* * If tvp disappeared we just carry on. */ if (de == NULL && *tvpp != NULL) { vrele(*tvpp); *tvpp = NULL; } /* * Get the tvp ino if the lookup succeeded. We may have to restart * if the non-blocking acquire fails. */ if (de != NULL) { nvp = NULL; error = tmpfs_alloc_vp(mp, de->td_node, LK_EXCLUSIVE | LK_NOWAIT, &nvp); if (*tvpp != NULL) vrele(*tvpp); *tvpp = nvp; if (error != 0) { VOP_UNLOCK(fdvp); VOP_UNLOCK(tdvp); if (error != EBUSY) goto releout; error = tmpfs_alloc_vp(mp, de->td_node, LK_EXCLUSIVE, &nvp); if (error != 0) goto releout; VOP_UNLOCK(nvp); /* * fdvp contains fvp, thus tvp (=fdvp) is not empty. */ if (nvp == fdvp) { error = ENOTEMPTY; goto releout; } goto relock; } } tmpfs_rename_restarts += restarts; return (0); releout: vrele(fdvp); vrele(*fvpp); vrele(tdvp); if (*tvpp != NULL) vrele(*tvpp); tmpfs_rename_restarts += restarts; return (error); } static int tmpfs_rename(struct vop_rename_args *v) { struct vnode *fdvp = v->a_fdvp; struct vnode *fvp = v->a_fvp; struct componentname *fcnp = v->a_fcnp; struct vnode *tdvp = v->a_tdvp; struct vnode *tvp = v->a_tvp; struct componentname *tcnp = v->a_tcnp; char *newname; struct tmpfs_dirent *de; struct tmpfs_mount *tmp; struct tmpfs_node *fdnode; struct tmpfs_node *fnode; struct tmpfs_node *tnode; struct tmpfs_node *tdnode; int error; bool want_seqc_end; MPASS(VOP_ISLOCKED(tdvp)); MPASS(IMPLIES(tvp != NULL, VOP_ISLOCKED(tvp))); MPASS(fcnp->cn_flags & HASBUF); MPASS(tcnp->cn_flags & HASBUF); want_seqc_end = false; /* * Disallow cross-device renames. * XXX Why isn't this done by the caller? */ if (fvp->v_mount != tdvp->v_mount || (tvp != NULL && fvp->v_mount != tvp->v_mount)) { error = EXDEV; goto out; } /* If source and target are the same file, there is nothing to do. */ if (fvp == tvp) { error = 0; goto out; } /* * If we need to move the directory between entries, lock the * source so that we can safely operate on it. */ if (fdvp != tdvp && fdvp != tvp) { if (vn_lock(fdvp, LK_EXCLUSIVE | LK_NOWAIT) != 0) { error = tmpfs_rename_relock(fdvp, &fvp, tdvp, &tvp, fcnp, tcnp); if (error != 0) return (error); ASSERT_VOP_ELOCKED(fdvp, "tmpfs_rename: fdvp not locked"); ASSERT_VOP_ELOCKED(tdvp, "tmpfs_rename: tdvp not locked"); if (tvp != NULL) ASSERT_VOP_ELOCKED(tvp, "tmpfs_rename: tvp not locked"); if (fvp == tvp) { error = 0; goto out_locked; } } } if (tvp != NULL) vn_seqc_write_begin(tvp); vn_seqc_write_begin(tdvp); vn_seqc_write_begin(fvp); vn_seqc_write_begin(fdvp); want_seqc_end = true; tmp = VFS_TO_TMPFS(tdvp->v_mount); tdnode = VP_TO_TMPFS_DIR(tdvp); tnode = (tvp == NULL) ? NULL : VP_TO_TMPFS_NODE(tvp); fdnode = VP_TO_TMPFS_DIR(fdvp); fnode = VP_TO_TMPFS_NODE(fvp); de = tmpfs_dir_lookup(fdnode, fnode, fcnp); /* * Entry can disappear before we lock fdvp, * also avoid manipulating '.' and '..' entries. */ if (de == NULL) { if ((fcnp->cn_flags & ISDOTDOT) != 0 || (fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.')) error = EINVAL; else error = ENOENT; goto out_locked; } MPASS(de->td_node == fnode); /* * If re-naming a directory to another preexisting directory * ensure that the target directory is empty so that its * removal causes no side effects. * Kern_rename guarantees the destination to be a directory * if the source is one. */ if (tvp != NULL) { MPASS(tnode != NULL); if ((tnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || (tdnode->tn_flags & (APPEND | IMMUTABLE))) { error = EPERM; goto out_locked; } if (fnode->tn_type == VDIR && tnode->tn_type == VDIR) { if (tnode->tn_size > 0) { error = ENOTEMPTY; goto out_locked; } } else if (fnode->tn_type == VDIR && tnode->tn_type != VDIR) { error = ENOTDIR; goto out_locked; } else if (fnode->tn_type != VDIR && tnode->tn_type == VDIR) { error = EISDIR; goto out_locked; } else { MPASS(fnode->tn_type != VDIR && tnode->tn_type != VDIR); } } if ((fnode->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) || (fdnode->tn_flags & (APPEND | IMMUTABLE))) { error = EPERM; goto out_locked; } /* * Ensure that we have enough memory to hold the new name, if it * has to be changed. */ if (fcnp->cn_namelen != tcnp->cn_namelen || bcmp(fcnp->cn_nameptr, tcnp->cn_nameptr, fcnp->cn_namelen) != 0) { newname = malloc(tcnp->cn_namelen, M_TMPFSNAME, M_WAITOK); } else newname = NULL; /* * If the node is being moved to another directory, we have to do * the move. */ if (fdnode != tdnode) { /* * In case we are moving a directory, we have to adjust its * parent to point to the new parent. */ if (de->td_node->tn_type == VDIR) { struct tmpfs_node *n; /* * Ensure the target directory is not a child of the * directory being moved. Otherwise, we'd end up * with stale nodes. */ n = tdnode; /* * TMPFS_LOCK guaranties that no nodes are freed while * traversing the list. Nodes can only be marked as * removed: tn_parent == NULL. */ TMPFS_LOCK(tmp); TMPFS_NODE_LOCK(n); while (n != n->tn_dir.tn_parent) { struct tmpfs_node *parent; if (n == fnode) { TMPFS_NODE_UNLOCK(n); TMPFS_UNLOCK(tmp); error = EINVAL; if (newname != NULL) free(newname, M_TMPFSNAME); goto out_locked; } parent = n->tn_dir.tn_parent; TMPFS_NODE_UNLOCK(n); if (parent == NULL) { n = NULL; break; } TMPFS_NODE_LOCK(parent); if (parent->tn_dir.tn_parent == NULL) { TMPFS_NODE_UNLOCK(parent); n = NULL; break; } n = parent; } TMPFS_UNLOCK(tmp); if (n == NULL) { error = EINVAL; if (newname != NULL) free(newname, M_TMPFSNAME); goto out_locked; } TMPFS_NODE_UNLOCK(n); /* Adjust the parent pointer. */ TMPFS_VALIDATE_DIR(fnode); TMPFS_NODE_LOCK(de->td_node); de->td_node->tn_dir.tn_parent = tdnode; TMPFS_NODE_UNLOCK(de->td_node); /* * As a result of changing the target of the '..' * entry, the link count of the source and target * directories has to be adjusted. */ TMPFS_NODE_LOCK(tdnode); TMPFS_ASSERT_LOCKED(tdnode); tdnode->tn_links++; TMPFS_NODE_UNLOCK(tdnode); TMPFS_NODE_LOCK(fdnode); TMPFS_ASSERT_LOCKED(fdnode); fdnode->tn_links--; TMPFS_NODE_UNLOCK(fdnode); } } /* * Do the move: just remove the entry from the source directory * and insert it into the target one. */ tmpfs_dir_detach(fdvp, de); if (fcnp->cn_flags & DOWHITEOUT) tmpfs_dir_whiteout_add(fdvp, fcnp); if (tcnp->cn_flags & ISWHITEOUT) tmpfs_dir_whiteout_remove(tdvp, tcnp); /* * If the name has changed, we need to make it effective by changing * it in the directory entry. */ if (newname != NULL) { MPASS(tcnp->cn_namelen <= MAXNAMLEN); free(de->ud.td_name, M_TMPFSNAME); de->ud.td_name = newname; tmpfs_dirent_init(de, tcnp->cn_nameptr, tcnp->cn_namelen); fnode->tn_status |= TMPFS_NODE_CHANGED; tdnode->tn_status |= TMPFS_NODE_MODIFIED; } /* * If we are overwriting an entry, we have to remove the old one * from the target directory. */ if (tvp != NULL) { struct tmpfs_dirent *tde; /* Remove the old entry from the target directory. */ tde = tmpfs_dir_lookup(tdnode, tnode, tcnp); tmpfs_dir_detach(tdvp, tde); /* * Free the directory entry we just deleted. Note that the * node referred by it will not be removed until the vnode is * really reclaimed. */ tmpfs_free_dirent(VFS_TO_TMPFS(tvp->v_mount), tde); } tmpfs_dir_attach(tdvp, de); if (tmpfs_use_nc(fvp)) { cache_purge(fvp); if (tvp != NULL) cache_purge(tvp); cache_purge_negative(tdvp); } error = 0; out_locked: if (fdvp != tdvp && fdvp != tvp) VOP_UNLOCK(fdvp); out: if (want_seqc_end) { if (tvp != NULL) vn_seqc_write_end(tvp); vn_seqc_write_end(tdvp); vn_seqc_write_end(fvp); vn_seqc_write_end(fdvp); } /* * Release target nodes. * XXX: I don't understand when tdvp can be the same as tvp, but * other code takes care of this... */ if (tdvp == tvp) vrele(tdvp); else vput(tdvp); if (tvp != NULL) vput(tvp); /* Release source nodes. */ vrele(fdvp); vrele(fvp); return (error); } static int tmpfs_mkdir(struct vop_mkdir_args *v) { struct vnode *dvp = v->a_dvp; struct vnode **vpp = v->a_vpp; struct componentname *cnp = v->a_cnp; struct vattr *vap = v->a_vap; MPASS(vap->va_type == VDIR); return tmpfs_alloc_file(dvp, vpp, vap, cnp, NULL); } static int tmpfs_rmdir(struct vop_rmdir_args *v) { struct vnode *dvp = v->a_dvp; struct vnode *vp = v->a_vp; int error; struct tmpfs_dirent *de; struct tmpfs_mount *tmp; struct tmpfs_node *dnode; struct tmpfs_node *node; MPASS(VOP_ISLOCKED(dvp)); MPASS(VOP_ISLOCKED(vp)); tmp = VFS_TO_TMPFS(dvp->v_mount); dnode = VP_TO_TMPFS_DIR(dvp); node = VP_TO_TMPFS_DIR(vp); /* Directories with more than two entries ('.' and '..') cannot be * removed. */ if (node->tn_size > 0) { error = ENOTEMPTY; goto out; } if ((dnode->tn_flags & APPEND) || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND))) { error = EPERM; goto out; } /* This invariant holds only if we are not trying to remove "..". * We checked for that above so this is safe now. */ MPASS(node->tn_dir.tn_parent == dnode); /* Get the directory entry associated with node (vp). This was * filled by tmpfs_lookup while looking up the entry. */ de = tmpfs_dir_lookup(dnode, node, v->a_cnp); MPASS(TMPFS_DIRENT_MATCHES(de, v->a_cnp->cn_nameptr, v->a_cnp->cn_namelen)); /* Check flags to see if we are allowed to remove the directory. */ if ((dnode->tn_flags & APPEND) != 0 || (node->tn_flags & (NOUNLINK | IMMUTABLE | APPEND)) != 0) { error = EPERM; goto out; } /* Detach the directory entry from the directory (dnode). */ tmpfs_dir_detach(dvp, de); if (v->a_cnp->cn_flags & DOWHITEOUT) tmpfs_dir_whiteout_add(dvp, v->a_cnp); /* No vnode should be allocated for this entry from this point */ TMPFS_NODE_LOCK(node); node->tn_links--; node->tn_dir.tn_parent = NULL; node->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; TMPFS_NODE_UNLOCK(node); TMPFS_NODE_LOCK(dnode); dnode->tn_links--; dnode->tn_status |= TMPFS_NODE_ACCESSED | TMPFS_NODE_CHANGED | TMPFS_NODE_MODIFIED; TMPFS_NODE_UNLOCK(dnode); if (tmpfs_use_nc(dvp)) { cache_purge(dvp); cache_purge(vp); } /* Free the directory entry we just deleted. Note that the node * referred by it will not be removed until the vnode is really * reclaimed. */ tmpfs_free_dirent(tmp, de); /* Release the deleted vnode (will destroy the node, notify * interested parties and clean it from the cache). */ dnode->tn_status |= TMPFS_NODE_CHANGED; tmpfs_update(dvp); error = 0; out: return error; } static int tmpfs_symlink(struct vop_symlink_args *v) { struct vnode *dvp = v->a_dvp; struct vnode **vpp = v->a_vpp; struct componentname *cnp = v->a_cnp; struct vattr *vap = v->a_vap; const char *target = v->a_target; #ifdef notyet /* XXX FreeBSD BUG: kern_symlink is not setting VLNK */ MPASS(vap->va_type == VLNK); #else vap->va_type = VLNK; #endif return tmpfs_alloc_file(dvp, vpp, vap, cnp, target); } static int tmpfs_readdir(struct vop_readdir_args *va) { struct vnode *vp; struct uio *uio; struct tmpfs_mount *tm; struct tmpfs_node *node; u_long **cookies; int *eofflag, *ncookies; ssize_t startresid; int error, maxcookies; vp = va->a_vp; uio = va->a_uio; eofflag = va->a_eofflag; cookies = va->a_cookies; ncookies = va->a_ncookies; /* This operation only makes sense on directory nodes. */ if (vp->v_type != VDIR) return ENOTDIR; maxcookies = 0; node = VP_TO_TMPFS_DIR(vp); tm = VFS_TO_TMPFS(vp->v_mount); startresid = uio->uio_resid; /* Allocate cookies for NFS and compat modules. */ if (cookies != NULL && ncookies != NULL) { maxcookies = howmany(node->tn_size, sizeof(struct tmpfs_dirent)) + 2; *cookies = malloc(maxcookies * sizeof(**cookies), M_TEMP, M_WAITOK); *ncookies = 0; } if (cookies == NULL) error = tmpfs_dir_getdents(tm, node, uio, 0, NULL, NULL); else error = tmpfs_dir_getdents(tm, node, uio, maxcookies, *cookies, ncookies); /* Buffer was filled without hitting EOF. */ if (error == EJUSTRETURN) error = (uio->uio_resid != startresid) ? 0 : EINVAL; if (error != 0 && cookies != NULL && ncookies != NULL) { free(*cookies, M_TEMP); *cookies = NULL; *ncookies = 0; } if (eofflag != NULL) *eofflag = (error == 0 && uio->uio_offset == TMPFS_DIRCOOKIE_EOF); return error; } static int tmpfs_readlink(struct vop_readlink_args *v) { struct vnode *vp = v->a_vp; struct uio *uio = v->a_uio; int error; struct tmpfs_node *node; MPASS(uio->uio_offset == 0); MPASS(vp->v_type == VLNK); node = VP_TO_TMPFS_NODE(vp); error = uiomove(node->tn_link, MIN(node->tn_size, uio->uio_resid), uio); tmpfs_set_status(VFS_TO_TMPFS(vp->v_mount), node, TMPFS_NODE_ACCESSED); return (error); } static int tmpfs_inactive(struct vop_inactive_args *v) { struct vnode *vp; struct tmpfs_node *node; vp = v->a_vp; node = VP_TO_TMPFS_NODE(vp); if (node->tn_links == 0) vrecycle(vp); else tmpfs_check_mtime(vp); return (0); } static int tmpfs_need_inactive(struct vop_need_inactive_args *ap) { struct vnode *vp; struct tmpfs_node *node; struct vm_object *obj; vp = ap->a_vp; node = VP_TO_TMPFS_NODE(vp); if (node->tn_links == 0) goto need; if (vp->v_type == VREG) { obj = vp->v_object; if (obj->generation != obj->cleangeneration) goto need; } return (0); need: return (1); } int tmpfs_reclaim(struct vop_reclaim_args *v) { struct vnode *vp = v->a_vp; struct tmpfs_mount *tmp; struct tmpfs_node *node; node = VP_TO_TMPFS_NODE(vp); tmp = VFS_TO_TMPFS(vp->v_mount); if (vp->v_type == VREG) tmpfs_destroy_vobject(vp, node->tn_reg.tn_aobj); vp->v_object = NULL; if (tmpfs_use_nc(vp)) cache_purge(vp); TMPFS_NODE_LOCK(node); tmpfs_free_vp(vp); /* If the node referenced by this vnode was deleted by the user, * we must free its associated data structures (now that the vnode * is being reclaimed). */ if (node->tn_links == 0 && (node->tn_vpstate & TMPFS_VNODE_ALLOCATING) == 0) { node->tn_vpstate = TMPFS_VNODE_DOOMED; TMPFS_NODE_UNLOCK(node); tmpfs_free_node(tmp, node); } else TMPFS_NODE_UNLOCK(node); MPASS(vp->v_data == NULL); return 0; } int tmpfs_print(struct vop_print_args *v) { struct vnode *vp = v->a_vp; struct tmpfs_node *node; node = VP_TO_TMPFS_NODE(vp); printf("tag VT_TMPFS, tmpfs_node %p, flags 0x%lx, links %jd\n", node, node->tn_flags, (uintmax_t)node->tn_links); printf("\tmode 0%o, owner %d, group %d, size %jd, status 0x%x\n", node->tn_mode, node->tn_uid, node->tn_gid, (intmax_t)node->tn_size, node->tn_status); if (vp->v_type == VFIFO) fifo_printinfo(vp); printf("\n"); return 0; } int tmpfs_pathconf(struct vop_pathconf_args *v) { struct vnode *vp = v->a_vp; int name = v->a_name; long *retval = v->a_retval; int error; error = 0; switch (name) { case _PC_LINK_MAX: *retval = TMPFS_LINK_MAX; break; case _PC_NAME_MAX: *retval = NAME_MAX; break; case _PC_PIPE_BUF: if (vp->v_type == VDIR || vp->v_type == VFIFO) *retval = PIPE_BUF; else error = EINVAL; break; case _PC_CHOWN_RESTRICTED: *retval = 1; break; case _PC_NO_TRUNC: *retval = 1; break; case _PC_SYNC_IO: *retval = 1; break; case _PC_FILESIZEBITS: *retval = 64; break; default: error = vop_stdpathconf(v); } return error; } static int tmpfs_vptofh(struct vop_vptofh_args *ap) /* vop_vptofh { IN struct vnode *a_vp; IN struct fid *a_fhp; }; */ { struct tmpfs_fid_data tfd; struct tmpfs_node *node; struct fid *fhp; node = VP_TO_TMPFS_NODE(ap->a_vp); fhp = ap->a_fhp; fhp->fid_len = sizeof(tfd); /* * Copy into fid_data from the stack to avoid unaligned pointer use. * See the comment in sys/mount.h on struct fid for details. */ tfd.tfd_id = node->tn_id; tfd.tfd_gen = node->tn_gen; memcpy(fhp->fid_data, &tfd, fhp->fid_len); return (0); } static int tmpfs_whiteout(struct vop_whiteout_args *ap) { struct vnode *dvp = ap->a_dvp; struct componentname *cnp = ap->a_cnp; struct tmpfs_dirent *de; switch (ap->a_flags) { case LOOKUP: return (0); case CREATE: de = tmpfs_dir_lookup(VP_TO_TMPFS_DIR(dvp), NULL, cnp); if (de != NULL) return (de->td_node == NULL ? 0 : EEXIST); return (tmpfs_dir_whiteout_add(dvp, cnp)); case DELETE: tmpfs_dir_whiteout_remove(dvp, cnp); return (0); default: panic("tmpfs_whiteout: unknown op"); } } static int tmpfs_vptocnp_dir(struct tmpfs_node *tn, struct tmpfs_node *tnp, struct tmpfs_dirent **pde) { struct tmpfs_dir_cursor dc; struct tmpfs_dirent *de; for (de = tmpfs_dir_first(tnp, &dc); de != NULL; de = tmpfs_dir_next(tnp, &dc)) { if (de->td_node == tn) { *pde = de; return (0); } } return (ENOENT); } static int tmpfs_vptocnp_fill(struct vnode *vp, struct tmpfs_node *tn, struct tmpfs_node *tnp, char *buf, size_t *buflen, struct vnode **dvp) { struct tmpfs_dirent *de; int error, i; error = vn_vget_ino_gen(vp, tmpfs_vn_get_ino_alloc, tnp, LK_SHARED, dvp); if (error != 0) return (error); error = tmpfs_vptocnp_dir(tn, tnp, &de); if (error == 0) { i = *buflen; i -= de->td_namelen; if (i < 0) { error = ENOMEM; } else { bcopy(de->ud.td_name, buf + i, de->td_namelen); *buflen = i; } } if (error == 0) { if (vp != *dvp) VOP_UNLOCK(*dvp); } else { if (vp != *dvp) vput(*dvp); else vrele(vp); } return (error); } static int tmpfs_vptocnp(struct vop_vptocnp_args *ap) { struct vnode *vp, **dvp; struct tmpfs_node *tn, *tnp, *tnp1; struct tmpfs_dirent *de; struct tmpfs_mount *tm; char *buf; size_t *buflen; int error; vp = ap->a_vp; dvp = ap->a_vpp; buf = ap->a_buf; buflen = ap->a_buflen; tm = VFS_TO_TMPFS(vp->v_mount); tn = VP_TO_TMPFS_NODE(vp); if (tn->tn_type == VDIR) { tnp = tn->tn_dir.tn_parent; if (tnp == NULL) return (ENOENT); tmpfs_ref_node(tnp); error = tmpfs_vptocnp_fill(vp, tn, tn->tn_dir.tn_parent, buf, buflen, dvp); tmpfs_free_node(tm, tnp); return (error); } restart: TMPFS_LOCK(tm); LIST_FOREACH_SAFE(tnp, &tm->tm_nodes_used, tn_entries, tnp1) { if (tnp->tn_type != VDIR) continue; TMPFS_NODE_LOCK(tnp); tmpfs_ref_node_locked(tnp); /* * tn_vnode cannot be instantiated while we hold the * node lock, so the directory cannot be changed while * we iterate over it. Do this to avoid instantiating * vnode for directories which cannot point to our * node. */ error = tnp->tn_vnode == NULL ? tmpfs_vptocnp_dir(tn, tnp, &de) : 0; if (error == 0) { TMPFS_NODE_UNLOCK(tnp); TMPFS_UNLOCK(tm); error = tmpfs_vptocnp_fill(vp, tn, tnp, buf, buflen, dvp); if (error == 0) { tmpfs_free_node(tm, tnp); return (0); } if (VN_IS_DOOMED(vp)) { tmpfs_free_node(tm, tnp); return (ENOENT); } TMPFS_LOCK(tm); TMPFS_NODE_LOCK(tnp); } if (tmpfs_free_node_locked(tm, tnp, false)) { goto restart; } else { KASSERT(tnp->tn_refcount > 0, ("node %p refcount zero", tnp)); tnp1 = LIST_NEXT(tnp, tn_entries); TMPFS_NODE_UNLOCK(tnp); } } TMPFS_UNLOCK(tm); return (ENOENT); } /* * Vnode operations vector used for files stored in a tmpfs file system. */ struct vop_vector tmpfs_vnodeop_entries = { .vop_default = &default_vnodeops, .vop_lookup = vfs_cache_lookup, .vop_cachedlookup = tmpfs_cached_lookup, .vop_create = tmpfs_create, .vop_mknod = tmpfs_mknod, .vop_open = tmpfs_open, .vop_close = tmpfs_close, .vop_fplookup_vexec = tmpfs_fplookup_vexec, .vop_access = tmpfs_access, + .vop_stat = tmpfs_stat, .vop_getattr = tmpfs_getattr, .vop_setattr = tmpfs_setattr, .vop_read = tmpfs_read, .vop_write = tmpfs_write, .vop_fsync = tmpfs_fsync, .vop_remove = tmpfs_remove, .vop_link = tmpfs_link, .vop_rename = tmpfs_rename, .vop_mkdir = tmpfs_mkdir, .vop_rmdir = tmpfs_rmdir, .vop_symlink = tmpfs_symlink, .vop_readdir = tmpfs_readdir, .vop_readlink = tmpfs_readlink, .vop_inactive = tmpfs_inactive, .vop_need_inactive = tmpfs_need_inactive, .vop_reclaim = tmpfs_reclaim, .vop_print = tmpfs_print, .vop_pathconf = tmpfs_pathconf, .vop_vptofh = tmpfs_vptofh, .vop_whiteout = tmpfs_whiteout, .vop_bmap = VOP_EOPNOTSUPP, .vop_vptocnp = tmpfs_vptocnp, .vop_lock1 = vop_lock, .vop_unlock = vop_unlock, .vop_islocked = vop_islocked, }; VFS_VOP_VECTOR_REGISTER(tmpfs_vnodeop_entries); /* * Same vector for mounts which do not use namecache. */ struct vop_vector tmpfs_vnodeop_nonc_entries = { .vop_default = &tmpfs_vnodeop_entries, .vop_lookup = tmpfs_lookup, }; VFS_VOP_VECTOR_REGISTER(tmpfs_vnodeop_nonc_entries); diff --git a/sys/fs/tmpfs/tmpfs_vnops.h b/sys/fs/tmpfs/tmpfs_vnops.h index 0fa9739c0bc6..267697701191 100644 --- a/sys/fs/tmpfs/tmpfs_vnops.h +++ b/sys/fs/tmpfs/tmpfs_vnops.h @@ -1,59 +1,60 @@ /* $NetBSD: tmpfs_vnops.h,v 1.7 2005/12/03 17:34:44 christos Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause-NetBSD * * Copyright (c) 2005 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Julio M. Merino Vidal, developed as part of Google's Summer of Code * 2005 program. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 _FS_TMPFS_TMPFS_VNOPS_H_ #define _FS_TMPFS_TMPFS_VNOPS_H_ #if !defined(_KERNEL) #error not supposed to be exposed to userland. #endif /* * Declarations for tmpfs_vnops.c. */ extern struct vop_vector tmpfs_vnodeop_entries; extern struct vop_vector tmpfs_vnodeop_nonc_entries; vop_access_t tmpfs_access; vop_fplookup_vexec_t tmpfs_fplookup_vexec; +vop_stat_t tmpfs_stat; vop_getattr_t tmpfs_getattr; vop_setattr_t tmpfs_setattr; vop_pathconf_t tmpfs_pathconf; vop_print_t tmpfs_print; vop_reclaim_t tmpfs_reclaim; #endif /* _FS_TMPFS_TMPFS_VNOPS_H_ */ diff --git a/sys/kern/vfs_default.c b/sys/kern/vfs_default.c index f67bc9bf3ef0..57465506d7d8 100644 --- a/sys/kern/vfs_default.c +++ b/sys/kern/vfs_default.c @@ -1,1463 +1,1576 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed * to Berkeley by John Heidemann of the UCLA Ficus project. * * Source: * @(#)i405_init.c 2.10 92/04/27 UCLA Ficus project * * 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. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include +#include +#include +#include #include #include #include #include #include #include #include #include #include static int vop_nolookup(struct vop_lookup_args *); static int vop_norename(struct vop_rename_args *); static int vop_nostrategy(struct vop_strategy_args *); static int get_next_dirent(struct vnode *vp, struct dirent **dpp, char *dirbuf, int dirbuflen, off_t *off, char **cpos, int *len, int *eofflag, struct thread *td); static int dirent_exists(struct vnode *vp, const char *dirname, struct thread *td); #define DIRENT_MINSIZE (sizeof(struct dirent) - (MAXNAMLEN+1) + 4) static int vop_stdis_text(struct vop_is_text_args *ap); static int vop_stdunset_text(struct vop_unset_text_args *ap); static int vop_stdadd_writecount(struct vop_add_writecount_args *ap); static int vop_stdcopy_file_range(struct vop_copy_file_range_args *ap); static int vop_stdfdatasync(struct vop_fdatasync_args *ap); static int vop_stdgetpages_async(struct vop_getpages_async_args *ap); +static int vop_stdstat(struct vop_stat_args *ap); /* * This vnode table stores what we want to do if the filesystem doesn't * implement a particular VOP. * * If there is no specific entry here, we will return EOPNOTSUPP. * * Note that every filesystem has to implement either vop_access * or vop_accessx; failing to do so will result in immediate crash * due to stack overflow, as vop_stdaccess() calls vop_stdaccessx(), * which calls vop_stdaccess() etc. */ struct vop_vector default_vnodeops = { .vop_default = NULL, .vop_bypass = VOP_EOPNOTSUPP, .vop_access = vop_stdaccess, .vop_accessx = vop_stdaccessx, .vop_advise = vop_stdadvise, .vop_advlock = vop_stdadvlock, .vop_advlockasync = vop_stdadvlockasync, .vop_advlockpurge = vop_stdadvlockpurge, .vop_allocate = vop_stdallocate, .vop_bmap = vop_stdbmap, .vop_close = VOP_NULL, .vop_fsync = VOP_NULL, + .vop_stat = vop_stdstat, .vop_fdatasync = vop_stdfdatasync, .vop_getpages = vop_stdgetpages, .vop_getpages_async = vop_stdgetpages_async, .vop_getwritemount = vop_stdgetwritemount, .vop_inactive = VOP_NULL, .vop_need_inactive = vop_stdneed_inactive, .vop_ioctl = vop_stdioctl, .vop_kqfilter = vop_stdkqfilter, .vop_islocked = vop_stdislocked, .vop_lock1 = vop_stdlock, .vop_lookup = vop_nolookup, .vop_open = VOP_NULL, .vop_pathconf = VOP_EINVAL, .vop_poll = vop_nopoll, .vop_putpages = vop_stdputpages, .vop_readlink = VOP_EINVAL, .vop_rename = vop_norename, .vop_revoke = VOP_PANIC, .vop_strategy = vop_nostrategy, .vop_unlock = vop_stdunlock, .vop_vptocnp = vop_stdvptocnp, .vop_vptofh = vop_stdvptofh, .vop_unp_bind = vop_stdunp_bind, .vop_unp_connect = vop_stdunp_connect, .vop_unp_detach = vop_stdunp_detach, .vop_is_text = vop_stdis_text, .vop_set_text = vop_stdset_text, .vop_unset_text = vop_stdunset_text, .vop_add_writecount = vop_stdadd_writecount, .vop_copy_file_range = vop_stdcopy_file_range, }; VFS_VOP_VECTOR_REGISTER(default_vnodeops); /* * Series of placeholder functions for various error returns for * VOPs. */ int vop_eopnotsupp(struct vop_generic_args *ap) { /* printf("vop_notsupp[%s]\n", ap->a_desc->vdesc_name); */ return (EOPNOTSUPP); } int vop_ebadf(struct vop_generic_args *ap) { return (EBADF); } int vop_enotty(struct vop_generic_args *ap) { return (ENOTTY); } int vop_einval(struct vop_generic_args *ap) { return (EINVAL); } int vop_enoent(struct vop_generic_args *ap) { return (ENOENT); } int vop_null(struct vop_generic_args *ap) { return (0); } /* * Helper function to panic on some bad VOPs in some filesystems. */ int vop_panic(struct vop_generic_args *ap) { panic("filesystem goof: vop_panic[%s]", ap->a_desc->vdesc_name); } /* * vop_std and vop_no are default functions for use by * filesystems that need the "default reasonable" implementation for a * particular operation. * * The documentation for the operations they implement exists (if it exists) * in the VOP_(9) manpage (all uppercase). */ /* * Default vop for filesystems that do not support name lookup */ static int vop_nolookup(ap) struct vop_lookup_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; } */ *ap; { *ap->a_vpp = NULL; return (ENOTDIR); } /* * vop_norename: * * Handle unlock and reference counting for arguments of vop_rename * for filesystems that do not implement rename operation. */ static int vop_norename(struct vop_rename_args *ap) { vop_rename_fail(ap); return (EOPNOTSUPP); } /* * vop_nostrategy: * * Strategy routine for VFS devices that have none. * * BIO_ERROR and B_INVAL must be cleared prior to calling any strategy * routine. Typically this is done for a BIO_READ strategy call. * Typically B_INVAL is assumed to already be clear prior to a write * and should not be cleared manually unless you just made the buffer * invalid. BIO_ERROR should be cleared either way. */ static int vop_nostrategy (struct vop_strategy_args *ap) { printf("No strategy for buffer at %p\n", ap->a_bp); vn_printf(ap->a_vp, "vnode "); ap->a_bp->b_ioflags |= BIO_ERROR; ap->a_bp->b_error = EOPNOTSUPP; bufdone(ap->a_bp); return (EOPNOTSUPP); } static int get_next_dirent(struct vnode *vp, struct dirent **dpp, char *dirbuf, int dirbuflen, off_t *off, char **cpos, int *len, int *eofflag, struct thread *td) { int error, reclen; struct uio uio; struct iovec iov; struct dirent *dp; KASSERT(VOP_ISLOCKED(vp), ("vp %p is not locked", vp)); KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp)); if (*len == 0) { iov.iov_base = dirbuf; iov.iov_len = dirbuflen; uio.uio_iov = &iov; uio.uio_iovcnt = 1; uio.uio_offset = *off; uio.uio_resid = dirbuflen; uio.uio_segflg = UIO_SYSSPACE; uio.uio_rw = UIO_READ; uio.uio_td = td; *eofflag = 0; #ifdef MAC error = mac_vnode_check_readdir(td->td_ucred, vp); if (error == 0) #endif error = VOP_READDIR(vp, &uio, td->td_ucred, eofflag, NULL, NULL); if (error) return (error); *off = uio.uio_offset; *cpos = dirbuf; *len = (dirbuflen - uio.uio_resid); if (*len == 0) return (ENOENT); } dp = (struct dirent *)(*cpos); reclen = dp->d_reclen; *dpp = dp; /* check for malformed directory.. */ if (reclen < DIRENT_MINSIZE) return (EINVAL); *cpos += reclen; *len -= reclen; return (0); } /* * Check if a named file exists in a given directory vnode. */ static int dirent_exists(struct vnode *vp, const char *dirname, struct thread *td) { char *dirbuf, *cpos; int error, eofflag, dirbuflen, len, found; off_t off; struct dirent *dp; struct vattr va; KASSERT(VOP_ISLOCKED(vp), ("vp %p is not locked", vp)); KASSERT(vp->v_type == VDIR, ("vp %p is not a directory", vp)); found = 0; error = VOP_GETATTR(vp, &va, td->td_ucred); if (error) return (found); dirbuflen = DEV_BSIZE; if (dirbuflen < va.va_blocksize) dirbuflen = va.va_blocksize; dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK); off = 0; len = 0; do { error = get_next_dirent(vp, &dp, dirbuf, dirbuflen, &off, &cpos, &len, &eofflag, td); if (error) goto out; if (dp->d_type != DT_WHT && dp->d_fileno != 0 && strcmp(dp->d_name, dirname) == 0) { found = 1; goto out; } } while (len > 0 || !eofflag); out: free(dirbuf, M_TEMP); return (found); } int vop_stdaccess(struct vop_access_args *ap) { KASSERT((ap->a_accmode & ~(VEXEC | VWRITE | VREAD | VADMIN | VAPPEND)) == 0, ("invalid bit in accmode")); return (VOP_ACCESSX(ap->a_vp, ap->a_accmode, ap->a_cred, ap->a_td)); } int vop_stdaccessx(struct vop_accessx_args *ap) { int error; accmode_t accmode = ap->a_accmode; error = vfs_unixify_accmode(&accmode); if (error != 0) return (error); if (accmode == 0) return (0); return (VOP_ACCESS(ap->a_vp, accmode, ap->a_cred, ap->a_td)); } /* * Advisory record locking support */ int vop_stdadvlock(struct vop_advlock_args *ap) { struct vnode *vp; struct vattr vattr; int error; vp = ap->a_vp; if (ap->a_fl->l_whence == SEEK_END) { /* * The NFSv4 server must avoid doing a vn_lock() here, since it * can deadlock the nfsd threads, due to a LOR. Fortunately * the NFSv4 server always uses SEEK_SET and this code is * only required for the SEEK_END case. */ vn_lock(vp, LK_SHARED | LK_RETRY); error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); VOP_UNLOCK(vp); if (error) return (error); } else vattr.va_size = 0; return (lf_advlock(ap, &(vp->v_lockf), vattr.va_size)); } int vop_stdadvlockasync(struct vop_advlockasync_args *ap) { struct vnode *vp; struct vattr vattr; int error; vp = ap->a_vp; if (ap->a_fl->l_whence == SEEK_END) { /* The size argument is only needed for SEEK_END. */ vn_lock(vp, LK_SHARED | LK_RETRY); error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); VOP_UNLOCK(vp); if (error) return (error); } else vattr.va_size = 0; return (lf_advlockasync(ap, &(vp->v_lockf), vattr.va_size)); } int vop_stdadvlockpurge(struct vop_advlockpurge_args *ap) { struct vnode *vp; vp = ap->a_vp; lf_purgelocks(vp, &vp->v_lockf); return (0); } /* * vop_stdpathconf: * * Standard implementation of POSIX pathconf, to get information about limits * for a filesystem. * Override per filesystem for the case where the filesystem has smaller * limits. */ int vop_stdpathconf(ap) struct vop_pathconf_args /* { struct vnode *a_vp; int a_name; int *a_retval; } */ *ap; { switch (ap->a_name) { case _PC_ASYNC_IO: *ap->a_retval = _POSIX_ASYNCHRONOUS_IO; return (0); case _PC_PATH_MAX: *ap->a_retval = PATH_MAX; return (0); case _PC_ACL_EXTENDED: case _PC_ACL_NFS4: case _PC_CAP_PRESENT: case _PC_INF_PRESENT: case _PC_MAC_PRESENT: *ap->a_retval = 0; return (0); default: return (EINVAL); } /* NOTREACHED */ } /* * Standard lock, unlock and islocked functions. */ int vop_stdlock(ap) struct vop_lock1_args /* { struct vnode *a_vp; int a_flags; char *file; int line; } */ *ap; { struct vnode *vp = ap->a_vp; struct mtx *ilk; ilk = VI_MTX(vp); return (lockmgr_lock_flags(vp->v_vnlock, ap->a_flags, &ilk->lock_object, ap->a_file, ap->a_line)); } /* See above. */ int vop_stdunlock(ap) struct vop_unlock_args /* { struct vnode *a_vp; } */ *ap; { struct vnode *vp = ap->a_vp; return (lockmgr_unlock(vp->v_vnlock)); } /* See above. */ int vop_stdislocked(ap) struct vop_islocked_args /* { struct vnode *a_vp; } */ *ap; { return (lockstatus(ap->a_vp->v_vnlock)); } /* * Variants of the above set. * * Differences are: * - shared locking disablement is not supported * - v_vnlock pointer is not honored */ int vop_lock(ap) struct vop_lock1_args /* { struct vnode *a_vp; int a_flags; char *file; int line; } */ *ap; { struct vnode *vp = ap->a_vp; int flags = ap->a_flags; struct mtx *ilk; MPASS(vp->v_vnlock == &vp->v_lock); if (__predict_false((flags & ~(LK_TYPE_MASK | LK_NODDLKTREAT | LK_RETRY)) != 0)) goto other; switch (flags & LK_TYPE_MASK) { case LK_SHARED: return (lockmgr_slock(&vp->v_lock, flags, ap->a_file, ap->a_line)); case LK_EXCLUSIVE: return (lockmgr_xlock(&vp->v_lock, flags, ap->a_file, ap->a_line)); } other: ilk = VI_MTX(vp); return (lockmgr_lock_flags(&vp->v_lock, flags, &ilk->lock_object, ap->a_file, ap->a_line)); } int vop_unlock(ap) struct vop_unlock_args /* { struct vnode *a_vp; } */ *ap; { struct vnode *vp = ap->a_vp; MPASS(vp->v_vnlock == &vp->v_lock); return (lockmgr_unlock(&vp->v_lock)); } int vop_islocked(ap) struct vop_islocked_args /* { struct vnode *a_vp; } */ *ap; { struct vnode *vp = ap->a_vp; MPASS(vp->v_vnlock == &vp->v_lock); return (lockstatus(&vp->v_lock)); } /* * Return true for select/poll. */ int vop_nopoll(ap) struct vop_poll_args /* { struct vnode *a_vp; int a_events; struct ucred *a_cred; struct thread *a_td; } */ *ap; { if (ap->a_events & ~POLLSTANDARD) return (POLLNVAL); return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); } /* * Implement poll for local filesystems that support it. */ int vop_stdpoll(ap) struct vop_poll_args /* { struct vnode *a_vp; int a_events; struct ucred *a_cred; struct thread *a_td; } */ *ap; { if (ap->a_events & ~POLLSTANDARD) return (vn_pollrecord(ap->a_vp, ap->a_td, ap->a_events)); return (ap->a_events & (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM)); } /* * Return our mount point, as we will take charge of the writes. */ int vop_stdgetwritemount(ap) struct vop_getwritemount_args /* { struct vnode *a_vp; struct mount **a_mpp; } */ *ap; { struct mount *mp; struct vnode *vp; /* * Note that having a reference does not prevent forced unmount from * setting ->v_mount to NULL after the lock gets released. This is of * no consequence for typical consumers (most notably vn_start_write) * since in this case the vnode is VIRF_DOOMED. Unmount might have * progressed far enough that its completion is only delayed by the * reference obtained here. The consumer only needs to concern itself * with releasing it. */ vp = ap->a_vp; mp = vp->v_mount; if (mp == NULL) { *(ap->a_mpp) = NULL; return (0); } if (vfs_op_thread_enter(mp)) { if (mp == vp->v_mount) { vfs_mp_count_add_pcpu(mp, ref, 1); vfs_op_thread_exit(mp); } else { vfs_op_thread_exit(mp); mp = NULL; } } else { MNT_ILOCK(mp); if (mp == vp->v_mount) { MNT_REF(mp); MNT_IUNLOCK(mp); } else { MNT_IUNLOCK(mp); mp = NULL; } } *(ap->a_mpp) = mp; return (0); } /* * If the file system doesn't implement VOP_BMAP, then return sensible defaults: * - Return the vnode's bufobj instead of any underlying device's bufobj * - Calculate the physical block number as if there were equal size * consecutive blocks, but * - Report no contiguous runs of blocks. */ int vop_stdbmap(ap) struct vop_bmap_args /* { struct vnode *a_vp; daddr_t a_bn; struct bufobj **a_bop; daddr_t *a_bnp; int *a_runp; int *a_runb; } */ *ap; { if (ap->a_bop != NULL) *ap->a_bop = &ap->a_vp->v_bufobj; if (ap->a_bnp != NULL) *ap->a_bnp = ap->a_bn * btodb(ap->a_vp->v_mount->mnt_stat.f_iosize); if (ap->a_runp != NULL) *ap->a_runp = 0; if (ap->a_runb != NULL) *ap->a_runb = 0; return (0); } int vop_stdfsync(ap) struct vop_fsync_args /* { struct vnode *a_vp; int a_waitfor; struct thread *a_td; } */ *ap; { return (vn_fsync_buf(ap->a_vp, ap->a_waitfor)); } static int vop_stdfdatasync(struct vop_fdatasync_args *ap) { return (VOP_FSYNC(ap->a_vp, MNT_WAIT, ap->a_td)); } int vop_stdfdatasync_buf(struct vop_fdatasync_args *ap) { return (vn_fsync_buf(ap->a_vp, MNT_WAIT)); } /* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */ int vop_stdgetpages(ap) struct vop_getpages_args /* { struct vnode *a_vp; vm_page_t *a_m; int a_count; int *a_rbehind; int *a_rahead; } */ *ap; { return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind, ap->a_rahead, NULL, NULL); } static int vop_stdgetpages_async(struct vop_getpages_async_args *ap) { int error; error = VOP_GETPAGES(ap->a_vp, ap->a_m, ap->a_count, ap->a_rbehind, ap->a_rahead); if (ap->a_iodone != NULL) ap->a_iodone(ap->a_arg, ap->a_m, ap->a_count, error); return (error); } int vop_stdkqfilter(struct vop_kqfilter_args *ap) { return vfs_kqfilter(ap); } /* XXX Needs good comment and more info in the manpage (VOP_PUTPAGES(9)). */ int vop_stdputpages(ap) struct vop_putpages_args /* { struct vnode *a_vp; vm_page_t *a_m; int a_count; int a_sync; int *a_rtvals; } */ *ap; { return vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count, ap->a_sync, ap->a_rtvals); } int vop_stdvptofh(struct vop_vptofh_args *ap) { return (EOPNOTSUPP); } int vop_stdvptocnp(struct vop_vptocnp_args *ap) { struct vnode *vp = ap->a_vp; struct vnode **dvp = ap->a_vpp; struct ucred *cred = ap->a_cred; char *buf = ap->a_buf; size_t *buflen = ap->a_buflen; char *dirbuf, *cpos; int i, error, eofflag, dirbuflen, flags, locked, len, covered; off_t off; ino_t fileno; struct vattr va; struct nameidata nd; struct thread *td; struct dirent *dp; struct vnode *mvp; i = *buflen; error = 0; covered = 0; td = curthread; if (vp->v_type != VDIR) return (ENOENT); error = VOP_GETATTR(vp, &va, cred); if (error) return (error); VREF(vp); locked = VOP_ISLOCKED(vp); VOP_UNLOCK(vp); NDINIT_ATVP(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF, UIO_SYSSPACE, "..", vp, td); flags = FREAD; error = vn_open_cred(&nd, &flags, 0, VN_OPEN_NOAUDIT, cred, NULL); if (error) { vn_lock(vp, locked | LK_RETRY); return (error); } NDFREE(&nd, NDF_ONLY_PNBUF); mvp = *dvp = nd.ni_vp; if (vp->v_mount != (*dvp)->v_mount && ((*dvp)->v_vflag & VV_ROOT) && ((*dvp)->v_mount->mnt_flag & MNT_UNION)) { *dvp = (*dvp)->v_mount->mnt_vnodecovered; VREF(mvp); VOP_UNLOCK(mvp); vn_close(mvp, FREAD, cred, td); VREF(*dvp); vn_lock(*dvp, LK_SHARED | LK_RETRY); covered = 1; } fileno = va.va_fileid; dirbuflen = DEV_BSIZE; if (dirbuflen < va.va_blocksize) dirbuflen = va.va_blocksize; dirbuf = (char *)malloc(dirbuflen, M_TEMP, M_WAITOK); if ((*dvp)->v_type != VDIR) { error = ENOENT; goto out; } off = 0; len = 0; do { /* call VOP_READDIR of parent */ error = get_next_dirent(*dvp, &dp, dirbuf, dirbuflen, &off, &cpos, &len, &eofflag, td); if (error) goto out; if ((dp->d_type != DT_WHT) && (dp->d_fileno == fileno)) { if (covered) { VOP_UNLOCK(*dvp); vn_lock(mvp, LK_SHARED | LK_RETRY); if (dirent_exists(mvp, dp->d_name, td)) { error = ENOENT; VOP_UNLOCK(mvp); vn_lock(*dvp, LK_SHARED | LK_RETRY); goto out; } VOP_UNLOCK(mvp); vn_lock(*dvp, LK_SHARED | LK_RETRY); } i -= dp->d_namlen; if (i < 0) { error = ENOMEM; goto out; } if (dp->d_namlen == 1 && dp->d_name[0] == '.') { error = ENOENT; } else { bcopy(dp->d_name, buf + i, dp->d_namlen); error = 0; } goto out; } } while (len > 0 || !eofflag); error = ENOENT; out: free(dirbuf, M_TEMP); if (!error) { *buflen = i; vref(*dvp); } if (covered) { vput(*dvp); vrele(mvp); } else { VOP_UNLOCK(mvp); vn_close(mvp, FREAD, cred, td); } vn_lock(vp, locked | LK_RETRY); return (error); } int vop_stdallocate(struct vop_allocate_args *ap) { #ifdef __notyet__ struct statfs *sfs; off_t maxfilesize = 0; #endif struct iovec aiov; struct vattr vattr, *vap; struct uio auio; off_t fsize, len, cur, offset; uint8_t *buf; struct thread *td; struct vnode *vp; size_t iosize; int error; buf = NULL; error = 0; td = curthread; vap = &vattr; vp = ap->a_vp; len = *ap->a_len; offset = *ap->a_offset; error = VOP_GETATTR(vp, vap, td->td_ucred); if (error != 0) goto out; fsize = vap->va_size; iosize = vap->va_blocksize; if (iosize == 0) iosize = BLKDEV_IOSIZE; if (iosize > MAXPHYS) iosize = MAXPHYS; buf = malloc(iosize, M_TEMP, M_WAITOK); #ifdef __notyet__ /* * Check if the filesystem sets f_maxfilesize; if not use * VOP_SETATTR to perform the check. */ sfs = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = VFS_STATFS(vp->v_mount, sfs, td); if (error == 0) maxfilesize = sfs->f_maxfilesize; free(sfs, M_STATFS); if (error != 0) goto out; if (maxfilesize) { if (offset > maxfilesize || len > maxfilesize || offset + len > maxfilesize) { error = EFBIG; goto out; } } else #endif if (offset + len > vap->va_size) { /* * Test offset + len against the filesystem's maxfilesize. */ VATTR_NULL(vap); vap->va_size = offset + len; error = VOP_SETATTR(vp, vap, td->td_ucred); if (error != 0) goto out; VATTR_NULL(vap); vap->va_size = fsize; error = VOP_SETATTR(vp, vap, td->td_ucred); if (error != 0) goto out; } for (;;) { /* * Read and write back anything below the nominal file * size. There's currently no way outside the filesystem * to know whether this area is sparse or not. */ cur = iosize; if ((offset % iosize) != 0) cur -= (offset % iosize); if (cur > len) cur = len; if (offset < fsize) { aiov.iov_base = buf; aiov.iov_len = cur; auio.uio_iov = &aiov; auio.uio_iovcnt = 1; auio.uio_offset = offset; auio.uio_resid = cur; auio.uio_segflg = UIO_SYSSPACE; auio.uio_rw = UIO_READ; auio.uio_td = td; error = VOP_READ(vp, &auio, 0, td->td_ucred); if (error != 0) break; if (auio.uio_resid > 0) { bzero(buf + cur - auio.uio_resid, auio.uio_resid); } } else { bzero(buf, cur); } aiov.iov_base = buf; aiov.iov_len = cur; auio.uio_iov = &aiov; auio.uio_iovcnt = 1; auio.uio_offset = offset; auio.uio_resid = cur; auio.uio_segflg = UIO_SYSSPACE; auio.uio_rw = UIO_WRITE; auio.uio_td = td; error = VOP_WRITE(vp, &auio, 0, td->td_ucred); if (error != 0) break; len -= cur; offset += cur; if (len == 0) break; if (should_yield()) break; } out: *ap->a_len = len; *ap->a_offset = offset; free(buf, M_TEMP); return (error); } int vop_stdadvise(struct vop_advise_args *ap) { struct vnode *vp; struct bufobj *bo; daddr_t startn, endn; off_t bstart, bend, start, end; int bsize, error; vp = ap->a_vp; switch (ap->a_advice) { case POSIX_FADV_WILLNEED: /* * Do nothing for now. Filesystems should provide a * custom method which starts an asynchronous read of * the requested region. */ error = 0; break; case POSIX_FADV_DONTNEED: error = 0; vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); if (VN_IS_DOOMED(vp)) { VOP_UNLOCK(vp); break; } /* * Round to block boundaries (and later possibly further to * page boundaries). Applications cannot reasonably be aware * of the boundaries, and the rounding must be to expand at * both extremities to cover enough. It still doesn't cover * read-ahead. For partial blocks, this gives unnecessary * discarding of buffers but is efficient enough since the * pages usually remain in VMIO for some time. */ bsize = vp->v_bufobj.bo_bsize; bstart = rounddown(ap->a_start, bsize); bend = roundup(ap->a_end, bsize); /* * Deactivate pages in the specified range from the backing VM * object. Pages that are resident in the buffer cache will * remain wired until their corresponding buffers are released * below. */ if (vp->v_object != NULL) { start = trunc_page(bstart); end = round_page(bend); VM_OBJECT_RLOCK(vp->v_object); vm_object_page_noreuse(vp->v_object, OFF_TO_IDX(start), OFF_TO_IDX(end)); VM_OBJECT_RUNLOCK(vp->v_object); } bo = &vp->v_bufobj; BO_RLOCK(bo); startn = bstart / bsize; endn = bend / bsize; error = bnoreuselist(&bo->bo_clean, bo, startn, endn); if (error == 0) error = bnoreuselist(&bo->bo_dirty, bo, startn, endn); BO_RUNLOCK(bo); VOP_UNLOCK(vp); break; default: error = EINVAL; break; } return (error); } int vop_stdunp_bind(struct vop_unp_bind_args *ap) { ap->a_vp->v_unpcb = ap->a_unpcb; return (0); } int vop_stdunp_connect(struct vop_unp_connect_args *ap) { *ap->a_unpcb = ap->a_vp->v_unpcb; return (0); } int vop_stdunp_detach(struct vop_unp_detach_args *ap) { ap->a_vp->v_unpcb = NULL; return (0); } static int vop_stdis_text(struct vop_is_text_args *ap) { return (ap->a_vp->v_writecount < 0); } int vop_stdset_text(struct vop_set_text_args *ap) { struct vnode *vp; struct mount *mp; int error; vp = ap->a_vp; VI_LOCK(vp); if (vp->v_writecount > 0) { error = ETXTBSY; } else { /* * If requested by fs, keep a use reference to the * vnode until the last text reference is released. */ mp = vp->v_mount; if (mp != NULL && (mp->mnt_kern_flag & MNTK_TEXT_REFS) != 0 && vp->v_writecount == 0) { vp->v_iflag |= VI_TEXT_REF; vrefl(vp); } vp->v_writecount--; error = 0; } VI_UNLOCK(vp); return (error); } static int vop_stdunset_text(struct vop_unset_text_args *ap) { struct vnode *vp; int error; bool last; vp = ap->a_vp; last = false; VI_LOCK(vp); if (vp->v_writecount < 0) { if ((vp->v_iflag & VI_TEXT_REF) != 0 && vp->v_writecount == -1) { last = true; vp->v_iflag &= ~VI_TEXT_REF; } vp->v_writecount++; error = 0; } else { error = EINVAL; } VI_UNLOCK(vp); if (last) vunref(vp); return (error); } static int vop_stdadd_writecount(struct vop_add_writecount_args *ap) { struct vnode *vp; struct mount *mp; int error; vp = ap->a_vp; VI_LOCK_FLAGS(vp, MTX_DUPOK); if (vp->v_writecount < 0) { error = ETXTBSY; } else { VNASSERT(vp->v_writecount + ap->a_inc >= 0, vp, ("neg writecount increment %d", ap->a_inc)); if (vp->v_writecount == 0) { mp = vp->v_mount; if (mp != NULL && (mp->mnt_kern_flag & MNTK_NOMSYNC) == 0) vlazy(vp); } vp->v_writecount += ap->a_inc; error = 0; } VI_UNLOCK(vp); return (error); } int vop_stdneed_inactive(struct vop_need_inactive_args *ap) { return (1); } int vop_stdioctl(struct vop_ioctl_args *ap) { struct vnode *vp; struct vattr va; off_t *offp; int error; switch (ap->a_command) { case FIOSEEKDATA: case FIOSEEKHOLE: vp = ap->a_vp; error = vn_lock(vp, LK_SHARED); if (error != 0) return (EBADF); if (vp->v_type == VREG) error = VOP_GETATTR(vp, &va, ap->a_cred); else error = ENOTTY; if (error == 0) { offp = ap->a_data; if (*offp < 0 || *offp >= va.va_size) error = ENXIO; else if (ap->a_command == FIOSEEKHOLE) *offp = va.va_size; } VOP_UNLOCK(vp); break; default: error = ENOTTY; break; } return (error); } /* * vfs default ops * used to fill the vfs function table to get reasonable default return values. */ int vfs_stdroot (mp, flags, vpp) struct mount *mp; int flags; struct vnode **vpp; { return (EOPNOTSUPP); } int vfs_stdstatfs (mp, sbp) struct mount *mp; struct statfs *sbp; { return (EOPNOTSUPP); } int vfs_stdquotactl (mp, cmds, uid, arg) struct mount *mp; int cmds; uid_t uid; void *arg; { return (EOPNOTSUPP); } int vfs_stdsync(mp, waitfor) struct mount *mp; int waitfor; { struct vnode *vp, *mvp; struct thread *td; int error, lockreq, allerror = 0; td = curthread; lockreq = LK_EXCLUSIVE | LK_INTERLOCK; if (waitfor != MNT_WAIT) lockreq |= LK_NOWAIT; /* * Force stale buffer cache information to be flushed. */ loop: MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { if (vp->v_bufobj.bo_dirty.bv_cnt == 0) { VI_UNLOCK(vp); continue; } if ((error = vget(vp, lockreq, td)) != 0) { if (error == ENOENT) { MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); goto loop; } continue; } error = VOP_FSYNC(vp, waitfor, td); if (error) allerror = error; vput(vp); } return (allerror); } int vfs_stdnosync (mp, waitfor) struct mount *mp; int waitfor; { return (0); } static int vop_stdcopy_file_range(struct vop_copy_file_range_args *ap) { int error; error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp, ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags, ap->a_incred, ap->a_outcred, ap->a_fsizetd); return (error); } int vfs_stdvget (mp, ino, flags, vpp) struct mount *mp; ino_t ino; int flags; struct vnode **vpp; { return (EOPNOTSUPP); } int vfs_stdfhtovp (mp, fhp, flags, vpp) struct mount *mp; struct fid *fhp; int flags; struct vnode **vpp; { return (EOPNOTSUPP); } int vfs_stdinit (vfsp) struct vfsconf *vfsp; { return (0); } int vfs_stduninit (vfsp) struct vfsconf *vfsp; { return(0); } int vfs_stdextattrctl(mp, cmd, filename_vp, attrnamespace, attrname) struct mount *mp; int cmd; struct vnode *filename_vp; int attrnamespace; const char *attrname; { if (filename_vp != NULL) VOP_UNLOCK(filename_vp); return (EOPNOTSUPP); } int vfs_stdsysctl(mp, op, req) struct mount *mp; fsctlop_t op; struct sysctl_req *req; { return (EOPNOTSUPP); } static vop_bypass_t * bp_by_off(struct vop_vector *vop, struct vop_generic_args *a) { return (*(vop_bypass_t **)((char *)vop + a->a_desc->vdesc_vop_offset)); } int vop_sigdefer(struct vop_vector *vop, struct vop_generic_args *a) { vop_bypass_t *bp; int prev_stops, rc; bp = bp_by_off(vop, a); MPASS(bp != NULL); prev_stops = sigdeferstop(SIGDEFERSTOP_SILENT); rc = bp(a); sigallowstop(prev_stops); return (rc); } + +static int +vop_stdstat(struct vop_stat_args *a) +{ + struct vattr vattr; + struct vattr *vap; + struct vnode *vp; + struct stat *sb; + int error; + u_short mode; + + vp = a->a_vp; + sb = a->a_sb; + + error = vop_stat_helper_pre(a); + if (error != 0) + return (error); + + vap = &vattr; + + /* + * Initialize defaults for new and unusual fields, so that file + * systems which don't support these fields don't need to know + * about them. + */ + vap->va_birthtime.tv_sec = -1; + vap->va_birthtime.tv_nsec = 0; + vap->va_fsid = VNOVAL; + vap->va_rdev = NODEV; + + error = VOP_GETATTR(vp, vap, a->a_active_cred); + if (error) + goto out; + + /* + * Zero the spare stat fields + */ + bzero(sb, sizeof *sb); + + /* + * Copy from vattr table + */ + if (vap->va_fsid != VNOVAL) + sb->st_dev = vap->va_fsid; + else + sb->st_dev = vp->v_mount->mnt_stat.f_fsid.val[0]; + sb->st_ino = vap->va_fileid; + mode = vap->va_mode; + switch (vap->va_type) { + case VREG: + mode |= S_IFREG; + break; + case VDIR: + mode |= S_IFDIR; + break; + case VBLK: + mode |= S_IFBLK; + break; + case VCHR: + mode |= S_IFCHR; + break; + case VLNK: + mode |= S_IFLNK; + break; + case VSOCK: + mode |= S_IFSOCK; + break; + case VFIFO: + mode |= S_IFIFO; + break; + default: + error = EBADF; + goto out; + } + sb->st_mode = mode; + sb->st_nlink = vap->va_nlink; + sb->st_uid = vap->va_uid; + sb->st_gid = vap->va_gid; + sb->st_rdev = vap->va_rdev; + if (vap->va_size > OFF_MAX) { + error = EOVERFLOW; + goto out; + } + sb->st_size = vap->va_size; + sb->st_atim.tv_sec = vap->va_atime.tv_sec; + sb->st_atim.tv_nsec = vap->va_atime.tv_nsec; + sb->st_mtim.tv_sec = vap->va_mtime.tv_sec; + sb->st_mtim.tv_nsec = vap->va_mtime.tv_nsec; + sb->st_ctim.tv_sec = vap->va_ctime.tv_sec; + sb->st_ctim.tv_nsec = vap->va_ctime.tv_nsec; + sb->st_birthtim.tv_sec = vap->va_birthtime.tv_sec; + sb->st_birthtim.tv_nsec = vap->va_birthtime.tv_nsec; + + /* + * According to www.opengroup.org, the meaning of st_blksize is + * "a filesystem-specific preferred I/O block size for this + * object. In some filesystem types, this may vary from file + * to file" + * Use minimum/default of PAGE_SIZE (e.g. for VCHR). + */ + + sb->st_blksize = max(PAGE_SIZE, vap->va_blocksize); + sb->st_flags = vap->va_flags; + sb->st_blocks = vap->va_bytes / S_BLKSIZE; + sb->st_gen = vap->va_gen; +out: + return (vop_stat_helper_post(a, error)); +} diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index 5c25ab86cf9d..fb245cb6e3d2 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -1,6917 +1,6922 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, 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. * 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. * * @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95 */ /* * External virtual filesystem routines */ #include __FBSDID("$FreeBSD$"); #include "opt_ddb.h" #include "opt_watchdog.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DDB #include #endif static void delmntque(struct vnode *vp); static int flushbuflist(struct bufv *bufv, int flags, struct bufobj *bo, int slpflag, int slptimeo); static void syncer_shutdown(void *arg, int howto); static int vtryrecycle(struct vnode *vp); static void v_init_counters(struct vnode *); static void v_incr_devcount(struct vnode *); static void v_decr_devcount(struct vnode *); static void vgonel(struct vnode *); static void vfs_knllock(void *arg); static void vfs_knlunlock(void *arg); static void vfs_knl_assert_locked(void *arg); static void vfs_knl_assert_unlocked(void *arg); static void destroy_vpollinfo(struct vpollinfo *vi); static int v_inval_buf_range_locked(struct vnode *vp, struct bufobj *bo, daddr_t startlbn, daddr_t endlbn); static void vnlru_recalc(void); /* * These fences are intended for cases where some synchronization is * needed between access of v_iflags and lockless vnode refcount (v_holdcnt * and v_usecount) updates. Access to v_iflags is generally synchronized * by the interlock, but we have some internal assertions that check vnode * flags without acquiring the lock. Thus, these fences are INVARIANTS-only * for now. */ #ifdef INVARIANTS #define VNODE_REFCOUNT_FENCE_ACQ() atomic_thread_fence_acq() #define VNODE_REFCOUNT_FENCE_REL() atomic_thread_fence_rel() #else #define VNODE_REFCOUNT_FENCE_ACQ() #define VNODE_REFCOUNT_FENCE_REL() #endif /* * Number of vnodes in existence. Increased whenever getnewvnode() * allocates a new vnode, decreased in vdropl() for VIRF_DOOMED vnode. */ static u_long __exclusive_cache_line numvnodes; SYSCTL_ULONG(_vfs, OID_AUTO, numvnodes, CTLFLAG_RD, &numvnodes, 0, "Number of vnodes in existence"); static counter_u64_t vnodes_created; SYSCTL_COUNTER_U64(_vfs, OID_AUTO, vnodes_created, CTLFLAG_RD, &vnodes_created, "Number of vnodes created by getnewvnode"); /* * Conversion tables for conversion from vnode types to inode formats * and back. */ enum vtype iftovt_tab[16] = { VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VNON }; int vttoif_tab[10] = { 0, S_IFREG, S_IFDIR, S_IFBLK, S_IFCHR, S_IFLNK, S_IFSOCK, S_IFIFO, S_IFMT, S_IFMT }; /* * List of allocates vnodes in the system. */ static TAILQ_HEAD(freelst, vnode) vnode_list; static struct vnode *vnode_list_free_marker; static struct vnode *vnode_list_reclaim_marker; /* * "Free" vnode target. Free vnodes are rarely completely free, but are * just ones that are cheap to recycle. Usually they are for files which * have been stat'd but not read; these usually have inode and namecache * data attached to them. This target is the preferred minimum size of a * sub-cache consisting mostly of such files. The system balances the size * of this sub-cache with its complement to try to prevent either from * thrashing while the other is relatively inactive. The targets express * a preference for the best balance. * * "Above" this target there are 2 further targets (watermarks) related * to recyling of free vnodes. In the best-operating case, the cache is * exactly full, the free list has size between vlowat and vhiwat above the * free target, and recycling from it and normal use maintains this state. * Sometimes the free list is below vlowat or even empty, but this state * is even better for immediate use provided the cache is not full. * Otherwise, vnlru_proc() runs to reclaim enough vnodes (usually non-free * ones) to reach one of these states. The watermarks are currently hard- * coded as 4% and 9% of the available space higher. These and the default * of 25% for wantfreevnodes are too large if the memory size is large. * E.g., 9% of 75% of MAXVNODES is more than 566000 vnodes to reclaim * whenever vnlru_proc() becomes active. */ static long wantfreevnodes; static long __exclusive_cache_line freevnodes; SYSCTL_ULONG(_vfs, OID_AUTO, freevnodes, CTLFLAG_RD, &freevnodes, 0, "Number of \"free\" vnodes"); static long freevnodes_old; static counter_u64_t recycles_count; SYSCTL_COUNTER_U64(_vfs, OID_AUTO, recycles, CTLFLAG_RD, &recycles_count, "Number of vnodes recycled to meet vnode cache targets"); static counter_u64_t recycles_free_count; SYSCTL_COUNTER_U64(_vfs, OID_AUTO, recycles_free, CTLFLAG_RD, &recycles_free_count, "Number of free vnodes recycled to meet vnode cache targets"); static counter_u64_t deferred_inact; SYSCTL_COUNTER_U64(_vfs, OID_AUTO, deferred_inact, CTLFLAG_RD, &deferred_inact, "Number of times inactive processing was deferred"); /* To keep more than one thread at a time from running vfs_getnewfsid */ static struct mtx mntid_mtx; /* * Lock for any access to the following: * vnode_list * numvnodes * freevnodes */ static struct mtx __exclusive_cache_line vnode_list_mtx; /* Publicly exported FS */ struct nfs_public nfs_pub; static uma_zone_t buf_trie_zone; static smr_t buf_trie_smr; /* Zone for allocation of new vnodes - used exclusively by getnewvnode() */ static uma_zone_t vnode_zone; static uma_zone_t vnodepoll_zone; __read_frequently smr_t vfs_smr; /* * The workitem queue. * * It is useful to delay writes of file data and filesystem metadata * for tens of seconds so that quickly created and deleted files need * not waste disk bandwidth being created and removed. To realize this, * we append vnodes to a "workitem" queue. When running with a soft * updates implementation, most pending metadata dependencies should * not wait for more than a few seconds. Thus, mounted on block devices * are delayed only about a half the time that file data is delayed. * Similarly, directory updates are more critical, so are only delayed * about a third the time that file data is delayed. Thus, there are * SYNCER_MAXDELAY queues that are processed round-robin at a rate of * one each second (driven off the filesystem syncer process). The * syncer_delayno variable indicates the next queue that is to be processed. * Items that need to be processed soon are placed in this queue: * * syncer_workitem_pending[syncer_delayno] * * A delay of fifteen seconds is done by placing the request fifteen * entries later in the queue: * * syncer_workitem_pending[(syncer_delayno + 15) & syncer_mask] * */ static int syncer_delayno; static long syncer_mask; LIST_HEAD(synclist, bufobj); static struct synclist *syncer_workitem_pending; /* * The sync_mtx protects: * bo->bo_synclist * sync_vnode_count * syncer_delayno * syncer_state * syncer_workitem_pending * syncer_worklist_len * rushjob */ static struct mtx sync_mtx; static struct cv sync_wakeup; #define SYNCER_MAXDELAY 32 static int syncer_maxdelay = SYNCER_MAXDELAY; /* maximum delay time */ static int syncdelay = 30; /* max time to delay syncing data */ static int filedelay = 30; /* time to delay syncing files */ SYSCTL_INT(_kern, OID_AUTO, filedelay, CTLFLAG_RW, &filedelay, 0, "Time to delay syncing files (in seconds)"); static int dirdelay = 29; /* time to delay syncing directories */ SYSCTL_INT(_kern, OID_AUTO, dirdelay, CTLFLAG_RW, &dirdelay, 0, "Time to delay syncing directories (in seconds)"); static int metadelay = 28; /* time to delay syncing metadata */ SYSCTL_INT(_kern, OID_AUTO, metadelay, CTLFLAG_RW, &metadelay, 0, "Time to delay syncing metadata (in seconds)"); static int rushjob; /* number of slots to run ASAP */ static int stat_rush_requests; /* number of times I/O speeded up */ SYSCTL_INT(_debug, OID_AUTO, rush_requests, CTLFLAG_RW, &stat_rush_requests, 0, "Number of times I/O speeded up (rush requests)"); #define VDBATCH_SIZE 8 struct vdbatch { u_int index; long freevnodes; struct mtx lock; struct vnode *tab[VDBATCH_SIZE]; }; DPCPU_DEFINE_STATIC(struct vdbatch, vd); static void vdbatch_dequeue(struct vnode *vp); /* * When shutting down the syncer, run it at four times normal speed. */ #define SYNCER_SHUTDOWN_SPEEDUP 4 static int sync_vnode_count; static int syncer_worklist_len; static enum { SYNCER_RUNNING, SYNCER_SHUTTING_DOWN, SYNCER_FINAL_DELAY } syncer_state; /* Target for maximum number of vnodes. */ u_long desiredvnodes; static u_long gapvnodes; /* gap between wanted and desired */ static u_long vhiwat; /* enough extras after expansion */ static u_long vlowat; /* minimal extras before expansion */ static u_long vstir; /* nonzero to stir non-free vnodes */ static volatile int vsmalltrigger = 8; /* pref to keep if > this many pages */ static u_long vnlru_read_freevnodes(void); /* * Note that no attempt is made to sanitize these parameters. */ static int sysctl_maxvnodes(SYSCTL_HANDLER_ARGS) { u_long val; int error; val = desiredvnodes; error = sysctl_handle_long(oidp, &val, 0, req); if (error != 0 || req->newptr == NULL) return (error); if (val == desiredvnodes) return (0); mtx_lock(&vnode_list_mtx); desiredvnodes = val; wantfreevnodes = desiredvnodes / 4; vnlru_recalc(); mtx_unlock(&vnode_list_mtx); /* * XXX There is no protection against multiple threads changing * desiredvnodes at the same time. Locking above only helps vnlru and * getnewvnode. */ vfs_hash_changesize(desiredvnodes); cache_changesize(desiredvnodes); return (0); } SYSCTL_PROC(_kern, KERN_MAXVNODES, maxvnodes, CTLTYPE_ULONG | CTLFLAG_MPSAFE | CTLFLAG_RW, NULL, 0, sysctl_maxvnodes, "LU", "Target for maximum number of vnodes"); static int sysctl_wantfreevnodes(SYSCTL_HANDLER_ARGS) { u_long val; int error; val = wantfreevnodes; error = sysctl_handle_long(oidp, &val, 0, req); if (error != 0 || req->newptr == NULL) return (error); if (val == wantfreevnodes) return (0); mtx_lock(&vnode_list_mtx); wantfreevnodes = val; vnlru_recalc(); mtx_unlock(&vnode_list_mtx); return (0); } SYSCTL_PROC(_vfs, OID_AUTO, wantfreevnodes, CTLTYPE_ULONG | CTLFLAG_MPSAFE | CTLFLAG_RW, NULL, 0, sysctl_wantfreevnodes, "LU", "Target for minimum number of \"free\" vnodes"); SYSCTL_ULONG(_kern, OID_AUTO, minvnodes, CTLFLAG_RW, &wantfreevnodes, 0, "Old name for vfs.wantfreevnodes (legacy)"); static int vnlru_nowhere; SYSCTL_INT(_debug, OID_AUTO, vnlru_nowhere, CTLFLAG_RW, &vnlru_nowhere, 0, "Number of times the vnlru process ran without success"); static int sysctl_try_reclaim_vnode(SYSCTL_HANDLER_ARGS) { struct vnode *vp; struct nameidata nd; char *buf; unsigned long ndflags; int error; if (req->newptr == NULL) return (EINVAL); if (req->newlen >= PATH_MAX) return (E2BIG); buf = malloc(PATH_MAX, M_TEMP, M_WAITOK); error = SYSCTL_IN(req, buf, req->newlen); if (error != 0) goto out; buf[req->newlen] = '\0'; ndflags = LOCKLEAF | NOFOLLOW | AUDITVNODE1 | NOCACHE | SAVENAME; NDINIT(&nd, LOOKUP, ndflags, UIO_SYSSPACE, buf, curthread); if ((error = namei(&nd)) != 0) goto out; vp = nd.ni_vp; if (VN_IS_DOOMED(vp)) { /* * This vnode is being recycled. Return != 0 to let the caller * know that the sysctl had no effect. Return EAGAIN because a * subsequent call will likely succeed (since namei will create * a new vnode if necessary) */ error = EAGAIN; goto putvnode; } counter_u64_add(recycles_count, 1); vgone(vp); putvnode: NDFREE(&nd, 0); out: free(buf, M_TEMP); return (error); } static int sysctl_ftry_reclaim_vnode(SYSCTL_HANDLER_ARGS) { struct thread *td = curthread; struct vnode *vp; struct file *fp; int error; int fd; if (req->newptr == NULL) return (EBADF); error = sysctl_handle_int(oidp, &fd, 0, req); if (error != 0) return (error); error = getvnode(curthread, fd, &cap_fcntl_rights, &fp); if (error != 0) return (error); vp = fp->f_vnode; error = vn_lock(vp, LK_EXCLUSIVE); if (error != 0) goto drop; counter_u64_add(recycles_count, 1); vgone(vp); VOP_UNLOCK(vp); drop: fdrop(fp, td); return (error); } SYSCTL_PROC(_debug, OID_AUTO, try_reclaim_vnode, CTLTYPE_STRING | CTLFLAG_MPSAFE | CTLFLAG_WR, NULL, 0, sysctl_try_reclaim_vnode, "A", "Try to reclaim a vnode by its pathname"); SYSCTL_PROC(_debug, OID_AUTO, ftry_reclaim_vnode, CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_WR, NULL, 0, sysctl_ftry_reclaim_vnode, "I", "Try to reclaim a vnode by its file descriptor"); /* Shift count for (uintptr_t)vp to initialize vp->v_hash. */ static int vnsz2log; /* * Support for the bufobj clean & dirty pctrie. */ static void * buf_trie_alloc(struct pctrie *ptree) { return (uma_zalloc_smr(buf_trie_zone, M_NOWAIT)); } static void buf_trie_free(struct pctrie *ptree, void *node) { uma_zfree_smr(buf_trie_zone, node); } PCTRIE_DEFINE_SMR(BUF, buf, b_lblkno, buf_trie_alloc, buf_trie_free, buf_trie_smr); /* * Initialize the vnode management data structures. * * Reevaluate the following cap on the number of vnodes after the physical * memory size exceeds 512GB. In the limit, as the physical memory size * grows, the ratio of the memory size in KB to vnodes approaches 64:1. */ #ifndef MAXVNODES_MAX #define MAXVNODES_MAX (512UL * 1024 * 1024 / 64) /* 8M */ #endif static MALLOC_DEFINE(M_VNODE_MARKER, "vnodemarker", "vnode marker"); static struct vnode * vn_alloc_marker(struct mount *mp) { struct vnode *vp; vp = malloc(sizeof(struct vnode), M_VNODE_MARKER, M_WAITOK | M_ZERO); vp->v_type = VMARKER; vp->v_mount = mp; return (vp); } static void vn_free_marker(struct vnode *vp) { MPASS(vp->v_type == VMARKER); free(vp, M_VNODE_MARKER); } /* * Initialize a vnode as it first enters the zone. */ static int vnode_init(void *mem, int size, int flags) { struct vnode *vp; vp = mem; bzero(vp, size); /* * Setup locks. */ vp->v_vnlock = &vp->v_lock; mtx_init(&vp->v_interlock, "vnode interlock", NULL, MTX_DEF); /* * By default, don't allow shared locks unless filesystems opt-in. */ lockinit(vp->v_vnlock, PVFS, "vnode", VLKTIMEOUT, LK_NOSHARE | LK_IS_VNODE); /* * Initialize bufobj. */ bufobj_init(&vp->v_bufobj, vp); /* * Initialize namecache. */ cache_vnode_init(vp); /* * Initialize rangelocks. */ rangelock_init(&vp->v_rl); vp->v_dbatchcpu = NOCPU; mtx_lock(&vnode_list_mtx); TAILQ_INSERT_BEFORE(vnode_list_free_marker, vp, v_vnodelist); mtx_unlock(&vnode_list_mtx); return (0); } /* * Free a vnode when it is cleared from the zone. */ static void vnode_fini(void *mem, int size) { struct vnode *vp; struct bufobj *bo; vp = mem; vdbatch_dequeue(vp); mtx_lock(&vnode_list_mtx); TAILQ_REMOVE(&vnode_list, vp, v_vnodelist); mtx_unlock(&vnode_list_mtx); rangelock_destroy(&vp->v_rl); lockdestroy(vp->v_vnlock); mtx_destroy(&vp->v_interlock); bo = &vp->v_bufobj; rw_destroy(BO_LOCKPTR(bo)); } /* * Provide the size of NFS nclnode and NFS fh for calculation of the * vnode memory consumption. The size is specified directly to * eliminate dependency on NFS-private header. * * Other filesystems may use bigger or smaller (like UFS and ZFS) * private inode data, but the NFS-based estimation is ample enough. * Still, we care about differences in the size between 64- and 32-bit * platforms. * * Namecache structure size is heuristically * sizeof(struct namecache_ts) + CACHE_PATH_CUTOFF + 1. */ #ifdef _LP64 #define NFS_NCLNODE_SZ (528 + 64) #define NC_SZ 148 #else #define NFS_NCLNODE_SZ (360 + 32) #define NC_SZ 92 #endif static void vntblinit(void *dummy __unused) { struct vdbatch *vd; int cpu, physvnodes, virtvnodes; u_int i; /* * Desiredvnodes is a function of the physical memory size and the * kernel's heap size. Generally speaking, it scales with the * physical memory size. The ratio of desiredvnodes to the physical * memory size is 1:16 until desiredvnodes exceeds 98,304. * Thereafter, the * marginal ratio of desiredvnodes to the physical memory size is * 1:64. However, desiredvnodes is limited by the kernel's heap * size. The memory required by desiredvnodes vnodes and vm objects * must not exceed 1/10th of the kernel's heap size. */ physvnodes = maxproc + pgtok(vm_cnt.v_page_count) / 64 + 3 * min(98304 * 16, pgtok(vm_cnt.v_page_count)) / 64; virtvnodes = vm_kmem_size / (10 * (sizeof(struct vm_object) + sizeof(struct vnode) + NC_SZ * ncsizefactor + NFS_NCLNODE_SZ)); desiredvnodes = min(physvnodes, virtvnodes); if (desiredvnodes > MAXVNODES_MAX) { if (bootverbose) printf("Reducing kern.maxvnodes %lu -> %lu\n", desiredvnodes, MAXVNODES_MAX); desiredvnodes = MAXVNODES_MAX; } wantfreevnodes = desiredvnodes / 4; mtx_init(&mntid_mtx, "mntid", NULL, MTX_DEF); TAILQ_INIT(&vnode_list); mtx_init(&vnode_list_mtx, "vnode_list", NULL, MTX_DEF); /* * The lock is taken to appease WITNESS. */ mtx_lock(&vnode_list_mtx); vnlru_recalc(); mtx_unlock(&vnode_list_mtx); vnode_list_free_marker = vn_alloc_marker(NULL); TAILQ_INSERT_HEAD(&vnode_list, vnode_list_free_marker, v_vnodelist); vnode_list_reclaim_marker = vn_alloc_marker(NULL); TAILQ_INSERT_HEAD(&vnode_list, vnode_list_reclaim_marker, v_vnodelist); vnode_zone = uma_zcreate("VNODE", sizeof (struct vnode), NULL, NULL, vnode_init, vnode_fini, UMA_ALIGN_PTR, 0); uma_zone_set_smr(vnode_zone, vfs_smr); vnodepoll_zone = uma_zcreate("VNODEPOLL", sizeof (struct vpollinfo), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); /* * Preallocate enough nodes to support one-per buf so that * we can not fail an insert. reassignbuf() callers can not * tolerate the insertion failure. */ buf_trie_zone = uma_zcreate("BUF TRIE", pctrie_node_size(), NULL, NULL, pctrie_zone_init, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE | UMA_ZONE_SMR); buf_trie_smr = uma_zone_get_smr(buf_trie_zone); uma_prealloc(buf_trie_zone, nbuf); vnodes_created = counter_u64_alloc(M_WAITOK); recycles_count = counter_u64_alloc(M_WAITOK); recycles_free_count = counter_u64_alloc(M_WAITOK); deferred_inact = counter_u64_alloc(M_WAITOK); /* * Initialize the filesystem syncer. */ syncer_workitem_pending = hashinit(syncer_maxdelay, M_VNODE, &syncer_mask); syncer_maxdelay = syncer_mask + 1; mtx_init(&sync_mtx, "Syncer mtx", NULL, MTX_DEF); cv_init(&sync_wakeup, "syncer"); for (i = 1; i <= sizeof(struct vnode); i <<= 1) vnsz2log++; vnsz2log--; CPU_FOREACH(cpu) { vd = DPCPU_ID_PTR((cpu), vd); bzero(vd, sizeof(*vd)); mtx_init(&vd->lock, "vdbatch", NULL, MTX_DEF); } } SYSINIT(vfs, SI_SUB_VFS, SI_ORDER_FIRST, vntblinit, NULL); /* * Mark a mount point as busy. Used to synchronize access and to delay * unmounting. Eventually, mountlist_mtx is not released on failure. * * vfs_busy() is a custom lock, it can block the caller. * vfs_busy() only sleeps if the unmount is active on the mount point. * For a mountpoint mp, vfs_busy-enforced lock is before lock of any * vnode belonging to mp. * * Lookup uses vfs_busy() to traverse mount points. * root fs var fs * / vnode lock A / vnode lock (/var) D * /var vnode lock B /log vnode lock(/var/log) E * vfs_busy lock C vfs_busy lock F * * Within each file system, the lock order is C->A->B and F->D->E. * * When traversing across mounts, the system follows that lock order: * * C->A->B * | * +->F->D->E * * The lookup() process for namei("/var") illustrates the process: * VOP_LOOKUP() obtains B while A is held * vfs_busy() obtains a shared lock on F while A and B are held * vput() releases lock on B * vput() releases lock on A * VFS_ROOT() obtains lock on D while shared lock on F is held * vfs_unbusy() releases shared lock on F * vn_lock() obtains lock on deadfs vnode vp_crossmp instead of A. * Attempt to lock A (instead of vp_crossmp) while D is held would * violate the global order, causing deadlocks. * * dounmount() locks B while F is drained. */ int vfs_busy(struct mount *mp, int flags) { MPASS((flags & ~MBF_MASK) == 0); CTR3(KTR_VFS, "%s: mp %p with flags %d", __func__, mp, flags); if (vfs_op_thread_enter(mp)) { MPASS((mp->mnt_kern_flag & MNTK_DRAINING) == 0); MPASS((mp->mnt_kern_flag & MNTK_UNMOUNT) == 0); MPASS((mp->mnt_kern_flag & MNTK_REFEXPIRE) == 0); vfs_mp_count_add_pcpu(mp, ref, 1); vfs_mp_count_add_pcpu(mp, lockref, 1); vfs_op_thread_exit(mp); if (flags & MBF_MNTLSTLOCK) mtx_unlock(&mountlist_mtx); return (0); } MNT_ILOCK(mp); vfs_assert_mount_counters(mp); MNT_REF(mp); /* * If mount point is currently being unmounted, sleep until the * mount point fate is decided. If thread doing the unmounting fails, * it will clear MNTK_UNMOUNT flag before waking us up, indicating * that this mount point has survived the unmount attempt and vfs_busy * should retry. Otherwise the unmounter thread will set MNTK_REFEXPIRE * flag in addition to MNTK_UNMOUNT, indicating that mount point is * about to be really destroyed. vfs_busy needs to release its * reference on the mount point in this case and return with ENOENT, * telling the caller that mount mount it tried to busy is no longer * valid. */ while (mp->mnt_kern_flag & MNTK_UNMOUNT) { if (flags & MBF_NOWAIT || mp->mnt_kern_flag & MNTK_REFEXPIRE) { MNT_REL(mp); MNT_IUNLOCK(mp); CTR1(KTR_VFS, "%s: failed busying before sleeping", __func__); return (ENOENT); } if (flags & MBF_MNTLSTLOCK) mtx_unlock(&mountlist_mtx); mp->mnt_kern_flag |= MNTK_MWAIT; msleep(mp, MNT_MTX(mp), PVFS | PDROP, "vfs_busy", 0); if (flags & MBF_MNTLSTLOCK) mtx_lock(&mountlist_mtx); MNT_ILOCK(mp); } if (flags & MBF_MNTLSTLOCK) mtx_unlock(&mountlist_mtx); mp->mnt_lockref++; MNT_IUNLOCK(mp); return (0); } /* * Free a busy filesystem. */ void vfs_unbusy(struct mount *mp) { int c; CTR2(KTR_VFS, "%s: mp %p", __func__, mp); if (vfs_op_thread_enter(mp)) { MPASS((mp->mnt_kern_flag & MNTK_DRAINING) == 0); vfs_mp_count_sub_pcpu(mp, lockref, 1); vfs_mp_count_sub_pcpu(mp, ref, 1); vfs_op_thread_exit(mp); return; } MNT_ILOCK(mp); vfs_assert_mount_counters(mp); MNT_REL(mp); c = --mp->mnt_lockref; if (mp->mnt_vfs_ops == 0) { MPASS((mp->mnt_kern_flag & MNTK_DRAINING) == 0); MNT_IUNLOCK(mp); return; } if (c < 0) vfs_dump_mount_counters(mp); if (c == 0 && (mp->mnt_kern_flag & MNTK_DRAINING) != 0) { MPASS(mp->mnt_kern_flag & MNTK_UNMOUNT); CTR1(KTR_VFS, "%s: waking up waiters", __func__); mp->mnt_kern_flag &= ~MNTK_DRAINING; wakeup(&mp->mnt_lockref); } MNT_IUNLOCK(mp); } /* * Lookup a mount point by filesystem identifier. */ struct mount * vfs_getvfs(fsid_t *fsid) { struct mount *mp; CTR2(KTR_VFS, "%s: fsid %p", __func__, fsid); mtx_lock(&mountlist_mtx); TAILQ_FOREACH(mp, &mountlist, mnt_list) { if (fsidcmp(&mp->mnt_stat.f_fsid, fsid) == 0) { vfs_ref(mp); mtx_unlock(&mountlist_mtx); return (mp); } } mtx_unlock(&mountlist_mtx); CTR2(KTR_VFS, "%s: lookup failed for %p id", __func__, fsid); return ((struct mount *) 0); } /* * Lookup a mount point by filesystem identifier, busying it before * returning. * * To avoid congestion on mountlist_mtx, implement simple direct-mapped * cache for popular filesystem identifiers. The cache is lockess, using * the fact that struct mount's are never freed. In worst case we may * get pointer to unmounted or even different filesystem, so we have to * check what we got, and go slow way if so. */ struct mount * vfs_busyfs(fsid_t *fsid) { #define FSID_CACHE_SIZE 256 typedef struct mount * volatile vmp_t; static vmp_t cache[FSID_CACHE_SIZE]; struct mount *mp; int error; uint32_t hash; CTR2(KTR_VFS, "%s: fsid %p", __func__, fsid); hash = fsid->val[0] ^ fsid->val[1]; hash = (hash >> 16 ^ hash) & (FSID_CACHE_SIZE - 1); mp = cache[hash]; if (mp == NULL || fsidcmp(&mp->mnt_stat.f_fsid, fsid) != 0) goto slow; if (vfs_busy(mp, 0) != 0) { cache[hash] = NULL; goto slow; } if (fsidcmp(&mp->mnt_stat.f_fsid, fsid) == 0) return (mp); else vfs_unbusy(mp); slow: mtx_lock(&mountlist_mtx); TAILQ_FOREACH(mp, &mountlist, mnt_list) { if (fsidcmp(&mp->mnt_stat.f_fsid, fsid) == 0) { error = vfs_busy(mp, MBF_MNTLSTLOCK); if (error) { cache[hash] = NULL; mtx_unlock(&mountlist_mtx); return (NULL); } cache[hash] = mp; return (mp); } } CTR2(KTR_VFS, "%s: lookup failed for %p id", __func__, fsid); mtx_unlock(&mountlist_mtx); return ((struct mount *) 0); } /* * Check if a user can access privileged mount options. */ int vfs_suser(struct mount *mp, struct thread *td) { int error; if (jailed(td->td_ucred)) { /* * If the jail of the calling thread lacks permission for * this type of file system, deny immediately. */ if (!prison_allow(td->td_ucred, mp->mnt_vfc->vfc_prison_flag)) return (EPERM); /* * If the file system was mounted outside the jail of the * calling thread, deny immediately. */ if (prison_check(td->td_ucred, mp->mnt_cred) != 0) return (EPERM); } /* * If file system supports delegated administration, we don't check * for the PRIV_VFS_MOUNT_OWNER privilege - it will be better verified * by the file system itself. * If this is not the user that did original mount, we check for * the PRIV_VFS_MOUNT_OWNER privilege. */ if (!(mp->mnt_vfc->vfc_flags & VFCF_DELEGADMIN) && mp->mnt_cred->cr_uid != td->td_ucred->cr_uid) { if ((error = priv_check(td, PRIV_VFS_MOUNT_OWNER)) != 0) return (error); } return (0); } /* * Get a new unique fsid. Try to make its val[0] unique, since this value * will be used to create fake device numbers for stat(). Also try (but * not so hard) make its val[0] unique mod 2^16, since some emulators only * support 16-bit device numbers. We end up with unique val[0]'s for the * first 2^16 calls and unique val[0]'s mod 2^16 for the first 2^8 calls. * * Keep in mind that several mounts may be running in parallel. Starting * the search one past where the previous search terminated is both a * micro-optimization and a defense against returning the same fsid to * different mounts. */ void vfs_getnewfsid(struct mount *mp) { static uint16_t mntid_base; struct mount *nmp; fsid_t tfsid; int mtype; CTR2(KTR_VFS, "%s: mp %p", __func__, mp); mtx_lock(&mntid_mtx); mtype = mp->mnt_vfc->vfc_typenum; tfsid.val[1] = mtype; mtype = (mtype & 0xFF) << 24; for (;;) { tfsid.val[0] = makedev(255, mtype | ((mntid_base & 0xFF00) << 8) | (mntid_base & 0xFF)); mntid_base++; if ((nmp = vfs_getvfs(&tfsid)) == NULL) break; vfs_rel(nmp); } mp->mnt_stat.f_fsid.val[0] = tfsid.val[0]; mp->mnt_stat.f_fsid.val[1] = tfsid.val[1]; mtx_unlock(&mntid_mtx); } /* * Knob to control the precision of file timestamps: * * 0 = seconds only; nanoseconds zeroed. * 1 = seconds and nanoseconds, accurate within 1/HZ. * 2 = seconds and nanoseconds, truncated to microseconds. * >=3 = seconds and nanoseconds, maximum precision. */ enum { TSP_SEC, TSP_HZ, TSP_USEC, TSP_NSEC }; static int timestamp_precision = TSP_USEC; SYSCTL_INT(_vfs, OID_AUTO, timestamp_precision, CTLFLAG_RW, ×tamp_precision, 0, "File timestamp precision (0: seconds, " "1: sec + ns accurate to 1/HZ, 2: sec + ns truncated to us, " "3+: sec + ns (max. precision))"); /* * Get a current timestamp. */ void vfs_timestamp(struct timespec *tsp) { struct timeval tv; switch (timestamp_precision) { case TSP_SEC: tsp->tv_sec = time_second; tsp->tv_nsec = 0; break; case TSP_HZ: getnanotime(tsp); break; case TSP_USEC: microtime(&tv); TIMEVAL_TO_TIMESPEC(&tv, tsp); break; case TSP_NSEC: default: nanotime(tsp); break; } } /* * Set vnode attributes to VNOVAL */ void vattr_null(struct vattr *vap) { vap->va_type = VNON; vap->va_size = VNOVAL; vap->va_bytes = VNOVAL; vap->va_mode = VNOVAL; vap->va_nlink = VNOVAL; vap->va_uid = VNOVAL; vap->va_gid = VNOVAL; vap->va_fsid = VNOVAL; vap->va_fileid = VNOVAL; vap->va_blocksize = VNOVAL; vap->va_rdev = VNOVAL; vap->va_atime.tv_sec = VNOVAL; vap->va_atime.tv_nsec = VNOVAL; vap->va_mtime.tv_sec = VNOVAL; vap->va_mtime.tv_nsec = VNOVAL; vap->va_ctime.tv_sec = VNOVAL; vap->va_ctime.tv_nsec = VNOVAL; vap->va_birthtime.tv_sec = VNOVAL; vap->va_birthtime.tv_nsec = VNOVAL; vap->va_flags = VNOVAL; vap->va_gen = VNOVAL; vap->va_vaflags = 0; } /* * Try to reduce the total number of vnodes. * * This routine (and its user) are buggy in at least the following ways: * - all parameters were picked years ago when RAM sizes were significantly * smaller * - it can pick vnodes based on pages used by the vm object, but filesystems * like ZFS don't use it making the pick broken * - since ZFS has its own aging policy it gets partially combated by this one * - a dedicated method should be provided for filesystems to let them decide * whether the vnode should be recycled * * This routine is called when we have too many vnodes. It attempts * to free vnodes and will potentially free vnodes that still * have VM backing store (VM backing store is typically the cause * of a vnode blowout so we want to do this). Therefore, this operation * is not considered cheap. * * A number of conditions may prevent a vnode from being reclaimed. * the buffer cache may have references on the vnode, a directory * vnode may still have references due to the namei cache representing * underlying files, or the vnode may be in active use. It is not * desirable to reuse such vnodes. These conditions may cause the * number of vnodes to reach some minimum value regardless of what * you set kern.maxvnodes to. Do not set kern.maxvnodes too low. * * @param reclaim_nc_src Only reclaim directories with outgoing namecache * entries if this argument is strue * @param trigger Only reclaim vnodes with fewer than this many resident * pages. * @param target How many vnodes to reclaim. * @return The number of vnodes that were reclaimed. */ static int vlrureclaim(bool reclaim_nc_src, int trigger, u_long target) { struct vnode *vp, *mvp; struct mount *mp; struct vm_object *object; u_long done; bool retried; mtx_assert(&vnode_list_mtx, MA_OWNED); retried = false; done = 0; mvp = vnode_list_reclaim_marker; restart: vp = mvp; while (done < target) { vp = TAILQ_NEXT(vp, v_vnodelist); if (__predict_false(vp == NULL)) break; if (__predict_false(vp->v_type == VMARKER)) continue; /* * If it's been deconstructed already, it's still * referenced, or it exceeds the trigger, skip it. * Also skip free vnodes. We are trying to make space * to expand the free list, not reduce it. */ if (vp->v_usecount > 0 || vp->v_holdcnt == 0 || (!reclaim_nc_src && !LIST_EMPTY(&vp->v_cache_src))) goto next_iter; if (vp->v_type == VBAD || vp->v_type == VNON) goto next_iter; if (!VI_TRYLOCK(vp)) goto next_iter; if (vp->v_usecount > 0 || vp->v_holdcnt == 0 || (!reclaim_nc_src && !LIST_EMPTY(&vp->v_cache_src)) || VN_IS_DOOMED(vp) || vp->v_type == VNON) { VI_UNLOCK(vp); goto next_iter; } object = atomic_load_ptr(&vp->v_object); if (object == NULL || object->resident_page_count > trigger) { VI_UNLOCK(vp); goto next_iter; } vholdl(vp); VI_UNLOCK(vp); TAILQ_REMOVE(&vnode_list, mvp, v_vnodelist); TAILQ_INSERT_AFTER(&vnode_list, vp, mvp, v_vnodelist); mtx_unlock(&vnode_list_mtx); if (vn_start_write(vp, &mp, V_NOWAIT) != 0) { vdrop(vp); goto next_iter_unlocked; } if (VOP_LOCK(vp, LK_EXCLUSIVE|LK_NOWAIT) != 0) { vdrop(vp); vn_finished_write(mp); goto next_iter_unlocked; } VI_LOCK(vp); if (vp->v_usecount > 0 || (!reclaim_nc_src && !LIST_EMPTY(&vp->v_cache_src)) || (vp->v_object != NULL && vp->v_object->resident_page_count > trigger)) { VOP_UNLOCK(vp); vdropl(vp); vn_finished_write(mp); goto next_iter_unlocked; } counter_u64_add(recycles_count, 1); vgonel(vp); VOP_UNLOCK(vp); vdropl(vp); vn_finished_write(mp); done++; next_iter_unlocked: if (should_yield()) kern_yield(PRI_USER); mtx_lock(&vnode_list_mtx); goto restart; next_iter: MPASS(vp->v_type != VMARKER); if (!should_yield()) continue; TAILQ_REMOVE(&vnode_list, mvp, v_vnodelist); TAILQ_INSERT_AFTER(&vnode_list, vp, mvp, v_vnodelist); mtx_unlock(&vnode_list_mtx); kern_yield(PRI_USER); mtx_lock(&vnode_list_mtx); goto restart; } if (done == 0 && !retried) { TAILQ_REMOVE(&vnode_list, mvp, v_vnodelist); TAILQ_INSERT_HEAD(&vnode_list, mvp, v_vnodelist); retried = true; goto restart; } return (done); } static int max_vnlru_free = 10000; /* limit on vnode free requests per call */ SYSCTL_INT(_debug, OID_AUTO, max_vnlru_free, CTLFLAG_RW, &max_vnlru_free, 0, "limit on vnode free requests per call to the vnlru_free routine"); /* * Attempt to reduce the free list by the requested amount. */ static int vnlru_free_locked(int count, struct vfsops *mnt_op) { struct vnode *vp, *mvp; struct mount *mp; int ocount; mtx_assert(&vnode_list_mtx, MA_OWNED); if (count > max_vnlru_free) count = max_vnlru_free; ocount = count; mvp = vnode_list_free_marker; restart: vp = mvp; while (count > 0) { vp = TAILQ_NEXT(vp, v_vnodelist); if (__predict_false(vp == NULL)) { TAILQ_REMOVE(&vnode_list, mvp, v_vnodelist); TAILQ_INSERT_TAIL(&vnode_list, mvp, v_vnodelist); break; } if (__predict_false(vp->v_type == VMARKER)) continue; /* * Don't recycle if our vnode is from different type * of mount point. Note that mp is type-safe, the * check does not reach unmapped address even if * vnode is reclaimed. * Don't recycle if we can't get the interlock without * blocking. */ if (vp->v_holdcnt > 0 || (mnt_op != NULL && (mp = vp->v_mount) != NULL && mp->mnt_op != mnt_op) || !VI_TRYLOCK(vp)) { continue; } TAILQ_REMOVE(&vnode_list, mvp, v_vnodelist); TAILQ_INSERT_AFTER(&vnode_list, vp, mvp, v_vnodelist); if (__predict_false(vp->v_type == VBAD || vp->v_type == VNON)) { VI_UNLOCK(vp); continue; } vholdl(vp); count--; mtx_unlock(&vnode_list_mtx); VI_UNLOCK(vp); vtryrecycle(vp); vdrop(vp); mtx_lock(&vnode_list_mtx); goto restart; } return (ocount - count); } void vnlru_free(int count, struct vfsops *mnt_op) { mtx_lock(&vnode_list_mtx); vnlru_free_locked(count, mnt_op); mtx_unlock(&vnode_list_mtx); } static void vnlru_recalc(void) { mtx_assert(&vnode_list_mtx, MA_OWNED); gapvnodes = imax(desiredvnodes - wantfreevnodes, 100); vhiwat = gapvnodes / 11; /* 9% -- just under the 10% in vlrureclaim() */ vlowat = vhiwat / 2; } /* * Attempt to recycle vnodes in a context that is always safe to block. * Calling vlrurecycle() from the bowels of filesystem code has some * interesting deadlock problems. */ static struct proc *vnlruproc; static int vnlruproc_sig; /* * The main freevnodes counter is only updated when threads requeue their vnode * batches. CPUs are conditionally walked to compute a more accurate total. * * Limit how much of a slop are we willing to tolerate. Note: the actual value * at any given moment can still exceed slop, but it should not be by significant * margin in practice. */ #define VNLRU_FREEVNODES_SLOP 128 static u_long vnlru_read_freevnodes(void) { struct vdbatch *vd; long slop; int cpu; mtx_assert(&vnode_list_mtx, MA_OWNED); if (freevnodes > freevnodes_old) slop = freevnodes - freevnodes_old; else slop = freevnodes_old - freevnodes; if (slop < VNLRU_FREEVNODES_SLOP) return (freevnodes >= 0 ? freevnodes : 0); freevnodes_old = freevnodes; CPU_FOREACH(cpu) { vd = DPCPU_ID_PTR((cpu), vd); freevnodes_old += vd->freevnodes; } return (freevnodes_old >= 0 ? freevnodes_old : 0); } static bool vnlru_under(u_long rnumvnodes, u_long limit) { u_long rfreevnodes, space; if (__predict_false(rnumvnodes > desiredvnodes)) return (true); space = desiredvnodes - rnumvnodes; if (space < limit) { rfreevnodes = vnlru_read_freevnodes(); if (rfreevnodes > wantfreevnodes) space += rfreevnodes - wantfreevnodes; } return (space < limit); } static bool vnlru_under_unlocked(u_long rnumvnodes, u_long limit) { long rfreevnodes, space; if (__predict_false(rnumvnodes > desiredvnodes)) return (true); space = desiredvnodes - rnumvnodes; if (space < limit) { rfreevnodes = atomic_load_long(&freevnodes); if (rfreevnodes > wantfreevnodes) space += rfreevnodes - wantfreevnodes; } return (space < limit); } static void vnlru_kick(void) { mtx_assert(&vnode_list_mtx, MA_OWNED); if (vnlruproc_sig == 0) { vnlruproc_sig = 1; wakeup(vnlruproc); } } static void vnlru_proc(void) { u_long rnumvnodes, rfreevnodes, target; unsigned long onumvnodes; int done, force, trigger, usevnodes; bool reclaim_nc_src, want_reread; EVENTHANDLER_REGISTER(shutdown_pre_sync, kproc_shutdown, vnlruproc, SHUTDOWN_PRI_FIRST); force = 0; want_reread = false; for (;;) { kproc_suspend_check(vnlruproc); mtx_lock(&vnode_list_mtx); rnumvnodes = atomic_load_long(&numvnodes); if (want_reread) { force = vnlru_under(numvnodes, vhiwat) ? 1 : 0; want_reread = false; } /* * If numvnodes is too large (due to desiredvnodes being * adjusted using its sysctl, or emergency growth), first * try to reduce it by discarding from the free list. */ if (rnumvnodes > desiredvnodes) { vnlru_free_locked(rnumvnodes - desiredvnodes, NULL); rnumvnodes = atomic_load_long(&numvnodes); } /* * Sleep if the vnode cache is in a good state. This is * when it is not over-full and has space for about a 4% * or 9% expansion (by growing its size or inexcessively * reducing its free list). Otherwise, try to reclaim * space for a 10% expansion. */ if (vstir && force == 0) { force = 1; vstir = 0; } if (force == 0 && !vnlru_under(rnumvnodes, vlowat)) { vnlruproc_sig = 0; wakeup(&vnlruproc_sig); msleep(vnlruproc, &vnode_list_mtx, PVFS|PDROP, "vlruwt", hz); continue; } rfreevnodes = vnlru_read_freevnodes(); onumvnodes = rnumvnodes; /* * Calculate parameters for recycling. These are the same * throughout the loop to give some semblance of fairness. * The trigger point is to avoid recycling vnodes with lots * of resident pages. We aren't trying to free memory; we * are trying to recycle or at least free vnodes. */ if (rnumvnodes <= desiredvnodes) usevnodes = rnumvnodes - rfreevnodes; else usevnodes = rnumvnodes; if (usevnodes <= 0) usevnodes = 1; /* * The trigger value is is chosen to give a conservatively * large value to ensure that it alone doesn't prevent * making progress. The value can easily be so large that * it is effectively infinite in some congested and * misconfigured cases, and this is necessary. Normally * it is about 8 to 100 (pages), which is quite large. */ trigger = vm_cnt.v_page_count * 2 / usevnodes; if (force < 2) trigger = vsmalltrigger; reclaim_nc_src = force >= 3; target = rnumvnodes * (int64_t)gapvnodes / imax(desiredvnodes, 1); target = target / 10 + 1; done = vlrureclaim(reclaim_nc_src, trigger, target); mtx_unlock(&vnode_list_mtx); if (onumvnodes > desiredvnodes && numvnodes <= desiredvnodes) uma_reclaim(UMA_RECLAIM_DRAIN); if (done == 0) { if (force == 0 || force == 1) { force = 2; continue; } if (force == 2) { force = 3; continue; } want_reread = true; force = 0; vnlru_nowhere++; tsleep(vnlruproc, PPAUSE, "vlrup", hz * 3); } else { want_reread = true; kern_yield(PRI_USER); } } } static struct kproc_desc vnlru_kp = { "vnlru", vnlru_proc, &vnlruproc }; SYSINIT(vnlru, SI_SUB_KTHREAD_UPDATE, SI_ORDER_FIRST, kproc_start, &vnlru_kp); /* * Routines having to do with the management of the vnode table. */ /* * Try to recycle a freed vnode. We abort if anyone picks up a reference * before we actually vgone(). This function must be called with the vnode * held to prevent the vnode from being returned to the free list midway * through vgone(). */ static int vtryrecycle(struct vnode *vp) { struct mount *vnmp; CTR2(KTR_VFS, "%s: vp %p", __func__, vp); VNASSERT(vp->v_holdcnt, vp, ("vtryrecycle: Recycling vp %p without a reference.", vp)); /* * This vnode may found and locked via some other list, if so we * can't recycle it yet. */ if (VOP_LOCK(vp, LK_EXCLUSIVE | LK_NOWAIT) != 0) { CTR2(KTR_VFS, "%s: impossible to recycle, vp %p lock is already held", __func__, vp); return (EWOULDBLOCK); } /* * Don't recycle if its filesystem is being suspended. */ if (vn_start_write(vp, &vnmp, V_NOWAIT) != 0) { VOP_UNLOCK(vp); CTR2(KTR_VFS, "%s: impossible to recycle, cannot start the write for %p", __func__, vp); return (EBUSY); } /* * If we got this far, we need to acquire the interlock and see if * anyone picked up this vnode from another list. If not, we will * mark it with DOOMED via vgonel() so that anyone who does find it * will skip over it. */ VI_LOCK(vp); if (vp->v_usecount) { VOP_UNLOCK(vp); VI_UNLOCK(vp); vn_finished_write(vnmp); CTR2(KTR_VFS, "%s: impossible to recycle, %p is already referenced", __func__, vp); return (EBUSY); } if (!VN_IS_DOOMED(vp)) { counter_u64_add(recycles_free_count, 1); vgonel(vp); } VOP_UNLOCK(vp); VI_UNLOCK(vp); vn_finished_write(vnmp); return (0); } /* * Allocate a new vnode. * * The operation never returns an error. Returning an error was disabled * in r145385 (dated 2005) with the following comment: * * XXX Not all VFS_VGET/ffs_vget callers check returns. * * Given the age of this commit (almost 15 years at the time of writing this * comment) restoring the ability to fail requires a significant audit of * all codepaths. * * The routine can try to free a vnode or stall for up to 1 second waiting for * vnlru to clear things up, but ultimately always performs a M_WAITOK allocation. */ static u_long vn_alloc_cyclecount; static struct vnode * __noinline vn_alloc_hard(struct mount *mp) { u_long rnumvnodes, rfreevnodes; mtx_lock(&vnode_list_mtx); rnumvnodes = atomic_load_long(&numvnodes); if (rnumvnodes + 1 < desiredvnodes) { vn_alloc_cyclecount = 0; goto alloc; } rfreevnodes = vnlru_read_freevnodes(); if (vn_alloc_cyclecount++ >= rfreevnodes) { vn_alloc_cyclecount = 0; vstir = 1; } /* * Grow the vnode cache if it will not be above its target max * after growing. Otherwise, if the free list is nonempty, try * to reclaim 1 item from it before growing the cache (possibly * above its target max if the reclamation failed or is delayed). * Otherwise, wait for some space. In all cases, schedule * vnlru_proc() if we are getting short of space. The watermarks * should be chosen so that we never wait or even reclaim from * the free list to below its target minimum. */ if (vnlru_free_locked(1, NULL) > 0) goto alloc; if (mp == NULL || (mp->mnt_kern_flag & MNTK_SUSPEND) == 0) { /* * Wait for space for a new vnode. */ vnlru_kick(); msleep(&vnlruproc_sig, &vnode_list_mtx, PVFS, "vlruwk", hz); if (atomic_load_long(&numvnodes) + 1 > desiredvnodes && vnlru_read_freevnodes() > 1) vnlru_free_locked(1, NULL); } alloc: rnumvnodes = atomic_fetchadd_long(&numvnodes, 1) + 1; if (vnlru_under(rnumvnodes, vlowat)) vnlru_kick(); mtx_unlock(&vnode_list_mtx); return (uma_zalloc_smr(vnode_zone, M_WAITOK)); } static struct vnode * vn_alloc(struct mount *mp) { u_long rnumvnodes; if (__predict_false(vn_alloc_cyclecount != 0)) return (vn_alloc_hard(mp)); rnumvnodes = atomic_fetchadd_long(&numvnodes, 1) + 1; if (__predict_false(vnlru_under_unlocked(rnumvnodes, vlowat))) { atomic_subtract_long(&numvnodes, 1); return (vn_alloc_hard(mp)); } return (uma_zalloc_smr(vnode_zone, M_WAITOK)); } static void vn_free(struct vnode *vp) { atomic_subtract_long(&numvnodes, 1); uma_zfree_smr(vnode_zone, vp); } /* * Return the next vnode from the free list. */ int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops, struct vnode **vpp) { struct vnode *vp; struct thread *td; struct lock_object *lo; CTR3(KTR_VFS, "%s: mp %p with tag %s", __func__, mp, tag); KASSERT(vops->registered, ("%s: not registered vector op %p\n", __func__, vops)); td = curthread; if (td->td_vp_reserved != NULL) { vp = td->td_vp_reserved; td->td_vp_reserved = NULL; } else { vp = vn_alloc(mp); } counter_u64_add(vnodes_created, 1); /* * Locks are given the generic name "vnode" when created. * Follow the historic practice of using the filesystem * name when they allocated, e.g., "zfs", "ufs", "nfs, etc. * * Locks live in a witness group keyed on their name. Thus, * when a lock is renamed, it must also move from the witness * group of its old name to the witness group of its new name. * * The change only needs to be made when the vnode moves * from one filesystem type to another. We ensure that each * filesystem use a single static name pointer for its tag so * that we can compare pointers rather than doing a strcmp(). */ lo = &vp->v_vnlock->lock_object; #ifdef WITNESS if (lo->lo_name != tag) { #endif lo->lo_name = tag; #ifdef WITNESS WITNESS_DESTROY(lo); WITNESS_INIT(lo, tag); } #endif /* * By default, don't allow shared locks unless filesystems opt-in. */ vp->v_vnlock->lock_object.lo_flags |= LK_NOSHARE; /* * Finalize various vnode identity bits. */ KASSERT(vp->v_object == NULL, ("stale v_object %p", vp)); KASSERT(vp->v_lockf == NULL, ("stale v_lockf %p", vp)); KASSERT(vp->v_pollinfo == NULL, ("stale v_pollinfo %p", vp)); vp->v_type = VNON; vp->v_op = vops; v_init_counters(vp); vp->v_bufobj.bo_ops = &buf_ops_bio; #ifdef DIAGNOSTIC if (mp == NULL && vops != &dead_vnodeops) printf("NULL mp in getnewvnode(9), tag %s\n", tag); #endif #ifdef MAC mac_vnode_init(vp); if (mp != NULL && (mp->mnt_flag & MNT_MULTILABEL) == 0) mac_vnode_associate_singlelabel(mp, vp); #endif if (mp != NULL) { vp->v_bufobj.bo_bsize = mp->mnt_stat.f_iosize; if ((mp->mnt_kern_flag & MNTK_NOKNOTE) != 0) vp->v_vflag |= VV_NOKNOTE; } /* * For the filesystems which do not use vfs_hash_insert(), * still initialize v_hash to have vfs_hash_index() useful. * E.g., nullfs uses vfs_hash_index() on the lower vnode for * its own hashing. */ vp->v_hash = (uintptr_t)vp >> vnsz2log; *vpp = vp; return (0); } void getnewvnode_reserve(void) { struct thread *td; td = curthread; MPASS(td->td_vp_reserved == NULL); td->td_vp_reserved = vn_alloc(NULL); } void getnewvnode_drop_reserve(void) { struct thread *td; td = curthread; if (td->td_vp_reserved != NULL) { vn_free(td->td_vp_reserved); td->td_vp_reserved = NULL; } } static void freevnode(struct vnode *vp) { struct bufobj *bo; /* * The vnode has been marked for destruction, so free it. * * The vnode will be returned to the zone where it will * normally remain until it is needed for another vnode. We * need to cleanup (or verify that the cleanup has already * been done) any residual data left from its current use * so as not to contaminate the freshly allocated vnode. */ CTR2(KTR_VFS, "%s: destroying the vnode %p", __func__, vp); /* * Paired with vgone. */ vn_seqc_write_end_locked(vp); VNPASS(vp->v_seqc_users == 0, vp); bo = &vp->v_bufobj; VNASSERT(vp->v_data == NULL, vp, ("cleaned vnode isn't")); VNPASS(vp->v_holdcnt == VHOLD_NO_SMR, vp); VNASSERT(vp->v_usecount == 0, vp, ("Non-zero use count")); VNASSERT(vp->v_writecount == 0, vp, ("Non-zero write count")); VNASSERT(bo->bo_numoutput == 0, vp, ("Clean vnode has pending I/O's")); VNASSERT(bo->bo_clean.bv_cnt == 0, vp, ("cleanbufcnt not 0")); VNASSERT(pctrie_is_empty(&bo->bo_clean.bv_root), vp, ("clean blk trie not empty")); VNASSERT(bo->bo_dirty.bv_cnt == 0, vp, ("dirtybufcnt not 0")); VNASSERT(pctrie_is_empty(&bo->bo_dirty.bv_root), vp, ("dirty blk trie not empty")); VNASSERT(TAILQ_EMPTY(&vp->v_cache_dst), vp, ("vp has namecache dst")); VNASSERT(LIST_EMPTY(&vp->v_cache_src), vp, ("vp has namecache src")); VNASSERT(vp->v_cache_dd == NULL, vp, ("vp has namecache for ..")); VNASSERT(TAILQ_EMPTY(&vp->v_rl.rl_waiters), vp, ("Dangling rangelock waiters")); VI_UNLOCK(vp); #ifdef MAC mac_vnode_destroy(vp); #endif if (vp->v_pollinfo != NULL) { destroy_vpollinfo(vp->v_pollinfo); vp->v_pollinfo = NULL; } #ifdef INVARIANTS /* XXX Elsewhere we detect an already freed vnode via NULL v_op. */ vp->v_op = NULL; #endif vp->v_mountedhere = NULL; vp->v_unpcb = NULL; vp->v_rdev = NULL; vp->v_fifoinfo = NULL; vp->v_lasta = vp->v_clen = vp->v_cstart = vp->v_lastw = 0; vp->v_irflag = 0; vp->v_iflag = 0; vp->v_vflag = 0; bo->bo_flag = 0; vn_free(vp); } /* * Delete from old mount point vnode list, if on one. */ static void delmntque(struct vnode *vp) { struct mount *mp; VNPASS((vp->v_mflag & VMP_LAZYLIST) == 0, vp); mp = vp->v_mount; if (mp == NULL) return; MNT_ILOCK(mp); VI_LOCK(vp); vp->v_mount = NULL; VI_UNLOCK(vp); VNASSERT(mp->mnt_nvnodelistsize > 0, vp, ("bad mount point vnode list size")); TAILQ_REMOVE(&mp->mnt_nvnodelist, vp, v_nmntvnodes); mp->mnt_nvnodelistsize--; MNT_REL(mp); MNT_IUNLOCK(mp); } static void insmntque_stddtr(struct vnode *vp, void *dtr_arg) { vp->v_data = NULL; vp->v_op = &dead_vnodeops; vgone(vp); vput(vp); } /* * Insert into list of vnodes for the new mount point, if available. */ int insmntque1(struct vnode *vp, struct mount *mp, void (*dtr)(struct vnode *, void *), void *dtr_arg) { KASSERT(vp->v_mount == NULL, ("insmntque: vnode already on per mount vnode list")); VNASSERT(mp != NULL, vp, ("Don't call insmntque(foo, NULL)")); ASSERT_VOP_ELOCKED(vp, "insmntque: non-locked vp"); /* * We acquire the vnode interlock early to ensure that the * vnode cannot be recycled by another process releasing a * holdcnt on it before we get it on both the vnode list * and the active vnode list. The mount mutex protects only * manipulation of the vnode list and the vnode freelist * mutex protects only manipulation of the active vnode list. * Hence the need to hold the vnode interlock throughout. */ MNT_ILOCK(mp); VI_LOCK(vp); if (((mp->mnt_kern_flag & MNTK_UNMOUNT) != 0 && ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0 || mp->mnt_nvnodelistsize == 0)) && (vp->v_vflag & VV_FORCEINSMQ) == 0) { VI_UNLOCK(vp); MNT_IUNLOCK(mp); if (dtr != NULL) dtr(vp, dtr_arg); return (EBUSY); } vp->v_mount = mp; MNT_REF(mp); TAILQ_INSERT_TAIL(&mp->mnt_nvnodelist, vp, v_nmntvnodes); VNASSERT(mp->mnt_nvnodelistsize >= 0, vp, ("neg mount point vnode list size")); mp->mnt_nvnodelistsize++; VI_UNLOCK(vp); MNT_IUNLOCK(mp); return (0); } int insmntque(struct vnode *vp, struct mount *mp) { return (insmntque1(vp, mp, insmntque_stddtr, NULL)); } /* * Flush out and invalidate all buffers associated with a bufobj * Called with the underlying object locked. */ int bufobj_invalbuf(struct bufobj *bo, int flags, int slpflag, int slptimeo) { int error; BO_LOCK(bo); if (flags & V_SAVE) { error = bufobj_wwait(bo, slpflag, slptimeo); if (error) { BO_UNLOCK(bo); return (error); } if (bo->bo_dirty.bv_cnt > 0) { BO_UNLOCK(bo); if ((error = BO_SYNC(bo, MNT_WAIT)) != 0) return (error); /* * XXX We could save a lock/unlock if this was only * enabled under INVARIANTS */ BO_LOCK(bo); if (bo->bo_numoutput > 0 || bo->bo_dirty.bv_cnt > 0) panic("vinvalbuf: dirty bufs"); } } /* * If you alter this loop please notice that interlock is dropped and * reacquired in flushbuflist. Special care is needed to ensure that * no race conditions occur from this. */ do { error = flushbuflist(&bo->bo_clean, flags, bo, slpflag, slptimeo); if (error == 0 && !(flags & V_CLEANONLY)) error = flushbuflist(&bo->bo_dirty, flags, bo, slpflag, slptimeo); if (error != 0 && error != EAGAIN) { BO_UNLOCK(bo); return (error); } } while (error != 0); /* * Wait for I/O to complete. XXX needs cleaning up. The vnode can * have write I/O in-progress but if there is a VM object then the * VM object can also have read-I/O in-progress. */ do { bufobj_wwait(bo, 0, 0); if ((flags & V_VMIO) == 0 && bo->bo_object != NULL) { BO_UNLOCK(bo); vm_object_pip_wait_unlocked(bo->bo_object, "bovlbx"); BO_LOCK(bo); } } while (bo->bo_numoutput > 0); BO_UNLOCK(bo); /* * Destroy the copy in the VM cache, too. */ if (bo->bo_object != NULL && (flags & (V_ALT | V_NORMAL | V_CLEANONLY | V_VMIO)) == 0) { VM_OBJECT_WLOCK(bo->bo_object); vm_object_page_remove(bo->bo_object, 0, 0, (flags & V_SAVE) ? OBJPR_CLEANONLY : 0); VM_OBJECT_WUNLOCK(bo->bo_object); } #ifdef INVARIANTS BO_LOCK(bo); if ((flags & (V_ALT | V_NORMAL | V_CLEANONLY | V_VMIO | V_ALLOWCLEAN)) == 0 && (bo->bo_dirty.bv_cnt > 0 || bo->bo_clean.bv_cnt > 0)) panic("vinvalbuf: flush failed"); if ((flags & (V_ALT | V_NORMAL | V_CLEANONLY | V_VMIO)) == 0 && bo->bo_dirty.bv_cnt > 0) panic("vinvalbuf: flush dirty failed"); BO_UNLOCK(bo); #endif return (0); } /* * Flush out and invalidate all buffers associated with a vnode. * Called with the underlying object locked. */ int vinvalbuf(struct vnode *vp, int flags, int slpflag, int slptimeo) { CTR3(KTR_VFS, "%s: vp %p with flags %d", __func__, vp, flags); ASSERT_VOP_LOCKED(vp, "vinvalbuf"); if (vp->v_object != NULL && vp->v_object->handle != vp) return (0); return (bufobj_invalbuf(&vp->v_bufobj, flags, slpflag, slptimeo)); } /* * Flush out buffers on the specified list. * */ static int flushbuflist(struct bufv *bufv, int flags, struct bufobj *bo, int slpflag, int slptimeo) { struct buf *bp, *nbp; int retval, error; daddr_t lblkno; b_xflags_t xflags; ASSERT_BO_WLOCKED(bo); retval = 0; TAILQ_FOREACH_SAFE(bp, &bufv->bv_hd, b_bobufs, nbp) { /* * If we are flushing both V_NORMAL and V_ALT buffers then * do not skip any buffers. If we are flushing only V_NORMAL * buffers then skip buffers marked as BX_ALTDATA. If we are * flushing only V_ALT buffers then skip buffers not marked * as BX_ALTDATA. */ if (((flags & (V_NORMAL | V_ALT)) != (V_NORMAL | V_ALT)) && (((flags & V_NORMAL) && (bp->b_xflags & BX_ALTDATA) != 0) || ((flags & V_ALT) && (bp->b_xflags & BX_ALTDATA) == 0))) { continue; } if (nbp != NULL) { lblkno = nbp->b_lblkno; xflags = nbp->b_xflags & (BX_VNDIRTY | BX_VNCLEAN); } retval = EAGAIN; error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, BO_LOCKPTR(bo), "flushbuf", slpflag, slptimeo); if (error) { BO_LOCK(bo); return (error != ENOLCK ? error : EAGAIN); } KASSERT(bp->b_bufobj == bo, ("bp %p wrong b_bufobj %p should be %p", bp, bp->b_bufobj, bo)); /* * XXX Since there are no node locks for NFS, I * believe there is a slight chance that a delayed * write will occur while sleeping just above, so * check for it. */ if (((bp->b_flags & (B_DELWRI | B_INVAL)) == B_DELWRI) && (flags & V_SAVE)) { bremfree(bp); bp->b_flags |= B_ASYNC; bwrite(bp); BO_LOCK(bo); return (EAGAIN); /* XXX: why not loop ? */ } bremfree(bp); bp->b_flags |= (B_INVAL | B_RELBUF); bp->b_flags &= ~B_ASYNC; brelse(bp); BO_LOCK(bo); if (nbp == NULL) break; nbp = gbincore(bo, lblkno); if (nbp == NULL || (nbp->b_xflags & (BX_VNDIRTY | BX_VNCLEAN)) != xflags) break; /* nbp invalid */ } return (retval); } int bnoreuselist(struct bufv *bufv, struct bufobj *bo, daddr_t startn, daddr_t endn) { struct buf *bp; int error; daddr_t lblkno; ASSERT_BO_LOCKED(bo); for (lblkno = startn;;) { again: bp = BUF_PCTRIE_LOOKUP_GE(&bufv->bv_root, lblkno); if (bp == NULL || bp->b_lblkno >= endn || bp->b_lblkno < startn) break; error = BUF_TIMELOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, BO_LOCKPTR(bo), "brlsfl", 0, 0); if (error != 0) { BO_RLOCK(bo); if (error == ENOLCK) goto again; return (error); } KASSERT(bp->b_bufobj == bo, ("bp %p wrong b_bufobj %p should be %p", bp, bp->b_bufobj, bo)); lblkno = bp->b_lblkno + 1; if ((bp->b_flags & B_MANAGED) == 0) bremfree(bp); bp->b_flags |= B_RELBUF; /* * In the VMIO case, use the B_NOREUSE flag to hint that the * pages backing each buffer in the range are unlikely to be * reused. Dirty buffers will have the hint applied once * they've been written. */ if ((bp->b_flags & B_VMIO) != 0) bp->b_flags |= B_NOREUSE; brelse(bp); BO_RLOCK(bo); } return (0); } /* * Truncate a file's buffer and pages to a specified length. This * is in lieu of the old vinvalbuf mechanism, which performed unneeded * sync activity. */ int vtruncbuf(struct vnode *vp, off_t length, int blksize) { struct buf *bp, *nbp; struct bufobj *bo; daddr_t startlbn; CTR4(KTR_VFS, "%s: vp %p with block %d:%ju", __func__, vp, blksize, (uintmax_t)length); /* * Round up to the *next* lbn. */ startlbn = howmany(length, blksize); ASSERT_VOP_LOCKED(vp, "vtruncbuf"); bo = &vp->v_bufobj; restart_unlocked: BO_LOCK(bo); while (v_inval_buf_range_locked(vp, bo, startlbn, INT64_MAX) == EAGAIN) ; if (length > 0) { restartsync: TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { if (bp->b_lblkno > 0) continue; /* * Since we hold the vnode lock this should only * fail if we're racing with the buf daemon. */ if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) goto restart_unlocked; VNASSERT((bp->b_flags & B_DELWRI), vp, ("buf(%p) on dirty queue without DELWRI", bp)); bremfree(bp); bawrite(bp); BO_LOCK(bo); goto restartsync; } } bufobj_wwait(bo, 0, 0); BO_UNLOCK(bo); vnode_pager_setsize(vp, length); return (0); } /* * Invalidate the cached pages of a file's buffer within the range of block * numbers [startlbn, endlbn). */ void v_inval_buf_range(struct vnode *vp, daddr_t startlbn, daddr_t endlbn, int blksize) { struct bufobj *bo; off_t start, end; ASSERT_VOP_LOCKED(vp, "v_inval_buf_range"); start = blksize * startlbn; end = blksize * endlbn; bo = &vp->v_bufobj; BO_LOCK(bo); MPASS(blksize == bo->bo_bsize); while (v_inval_buf_range_locked(vp, bo, startlbn, endlbn) == EAGAIN) ; BO_UNLOCK(bo); vn_pages_remove(vp, OFF_TO_IDX(start), OFF_TO_IDX(end + PAGE_SIZE - 1)); } static int v_inval_buf_range_locked(struct vnode *vp, struct bufobj *bo, daddr_t startlbn, daddr_t endlbn) { struct buf *bp, *nbp; bool anyfreed; ASSERT_VOP_LOCKED(vp, "v_inval_buf_range_locked"); ASSERT_BO_LOCKED(bo); do { anyfreed = false; TAILQ_FOREACH_SAFE(bp, &bo->bo_clean.bv_hd, b_bobufs, nbp) { if (bp->b_lblkno < startlbn || bp->b_lblkno >= endlbn) continue; if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { BO_LOCK(bo); return (EAGAIN); } bremfree(bp); bp->b_flags |= B_INVAL | B_RELBUF; bp->b_flags &= ~B_ASYNC; brelse(bp); anyfreed = true; BO_LOCK(bo); if (nbp != NULL && (((nbp->b_xflags & BX_VNCLEAN) == 0) || nbp->b_vp != vp || (nbp->b_flags & B_DELWRI) != 0)) return (EAGAIN); } TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { if (bp->b_lblkno < startlbn || bp->b_lblkno >= endlbn) continue; if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK, BO_LOCKPTR(bo)) == ENOLCK) { BO_LOCK(bo); return (EAGAIN); } bremfree(bp); bp->b_flags |= B_INVAL | B_RELBUF; bp->b_flags &= ~B_ASYNC; brelse(bp); anyfreed = true; BO_LOCK(bo); if (nbp != NULL && (((nbp->b_xflags & BX_VNDIRTY) == 0) || (nbp->b_vp != vp) || (nbp->b_flags & B_DELWRI) == 0)) return (EAGAIN); } } while (anyfreed); return (0); } static void buf_vlist_remove(struct buf *bp) { struct bufv *bv; b_xflags_t flags; flags = bp->b_xflags; KASSERT(bp->b_bufobj != NULL, ("No b_bufobj %p", bp)); ASSERT_BO_WLOCKED(bp->b_bufobj); KASSERT((flags & (BX_VNDIRTY | BX_VNCLEAN)) != 0 && (flags & (BX_VNDIRTY | BX_VNCLEAN)) != (BX_VNDIRTY | BX_VNCLEAN), ("%s: buffer %p has invalid queue state", __func__, bp)); if ((flags & BX_VNDIRTY) != 0) bv = &bp->b_bufobj->bo_dirty; else bv = &bp->b_bufobj->bo_clean; BUF_PCTRIE_REMOVE(&bv->bv_root, bp->b_lblkno); TAILQ_REMOVE(&bv->bv_hd, bp, b_bobufs); bv->bv_cnt--; bp->b_xflags &= ~(BX_VNDIRTY | BX_VNCLEAN); } /* * Add the buffer to the sorted clean or dirty block list. * * NOTE: xflags is passed as a constant, optimizing this inline function! */ static void buf_vlist_add(struct buf *bp, struct bufobj *bo, b_xflags_t xflags) { struct bufv *bv; struct buf *n; int error; ASSERT_BO_WLOCKED(bo); KASSERT((bo->bo_flag & BO_NOBUFS) == 0, ("buf_vlist_add: bo %p does not allow bufs", bo)); KASSERT((xflags & BX_VNDIRTY) == 0 || (bo->bo_flag & BO_DEAD) == 0, ("dead bo %p", bo)); KASSERT((bp->b_xflags & (BX_VNDIRTY|BX_VNCLEAN)) == 0, ("buf_vlist_add: Buf %p has existing xflags %d", bp, bp->b_xflags)); bp->b_xflags |= xflags; if (xflags & BX_VNDIRTY) bv = &bo->bo_dirty; else bv = &bo->bo_clean; /* * Keep the list ordered. Optimize empty list insertion. Assume * we tend to grow at the tail so lookup_le should usually be cheaper * than _ge. */ if (bv->bv_cnt == 0 || bp->b_lblkno > TAILQ_LAST(&bv->bv_hd, buflists)->b_lblkno) TAILQ_INSERT_TAIL(&bv->bv_hd, bp, b_bobufs); else if ((n = BUF_PCTRIE_LOOKUP_LE(&bv->bv_root, bp->b_lblkno)) == NULL) TAILQ_INSERT_HEAD(&bv->bv_hd, bp, b_bobufs); else TAILQ_INSERT_AFTER(&bv->bv_hd, n, bp, b_bobufs); error = BUF_PCTRIE_INSERT(&bv->bv_root, bp); if (error) panic("buf_vlist_add: Preallocated nodes insufficient."); bv->bv_cnt++; } /* * Look up a buffer using the buffer tries. */ struct buf * gbincore(struct bufobj *bo, daddr_t lblkno) { struct buf *bp; ASSERT_BO_LOCKED(bo); bp = BUF_PCTRIE_LOOKUP(&bo->bo_clean.bv_root, lblkno); if (bp != NULL) return (bp); return (BUF_PCTRIE_LOOKUP(&bo->bo_dirty.bv_root, lblkno)); } /* * Look up a buf using the buffer tries, without the bufobj lock. This relies * on SMR for safe lookup, and bufs being in a no-free zone to provide type * stability of the result. Like other lockless lookups, the found buf may * already be invalid by the time this function returns. */ struct buf * gbincore_unlocked(struct bufobj *bo, daddr_t lblkno) { struct buf *bp; ASSERT_BO_UNLOCKED(bo); bp = BUF_PCTRIE_LOOKUP_UNLOCKED(&bo->bo_clean.bv_root, lblkno); if (bp != NULL) return (bp); return (BUF_PCTRIE_LOOKUP_UNLOCKED(&bo->bo_dirty.bv_root, lblkno)); } /* * Associate a buffer with a vnode. */ void bgetvp(struct vnode *vp, struct buf *bp) { struct bufobj *bo; bo = &vp->v_bufobj; ASSERT_BO_WLOCKED(bo); VNASSERT(bp->b_vp == NULL, bp->b_vp, ("bgetvp: not free")); CTR3(KTR_BUF, "bgetvp(%p) vp %p flags %X", bp, vp, bp->b_flags); VNASSERT((bp->b_xflags & (BX_VNDIRTY|BX_VNCLEAN)) == 0, vp, ("bgetvp: bp already attached! %p", bp)); vhold(vp); bp->b_vp = vp; bp->b_bufobj = bo; /* * Insert onto list for new vnode. */ buf_vlist_add(bp, bo, BX_VNCLEAN); } /* * Disassociate a buffer from a vnode. */ void brelvp(struct buf *bp) { struct bufobj *bo; struct vnode *vp; CTR3(KTR_BUF, "brelvp(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); KASSERT(bp->b_vp != NULL, ("brelvp: NULL")); /* * Delete from old vnode list, if on one. */ vp = bp->b_vp; /* XXX */ bo = bp->b_bufobj; BO_LOCK(bo); buf_vlist_remove(bp); if ((bo->bo_flag & BO_ONWORKLST) && bo->bo_dirty.bv_cnt == 0) { bo->bo_flag &= ~BO_ONWORKLST; mtx_lock(&sync_mtx); LIST_REMOVE(bo, bo_synclist); syncer_worklist_len--; mtx_unlock(&sync_mtx); } bp->b_vp = NULL; bp->b_bufobj = NULL; BO_UNLOCK(bo); vdrop(vp); } /* * Add an item to the syncer work queue. */ static void vn_syncer_add_to_worklist(struct bufobj *bo, int delay) { int slot; ASSERT_BO_WLOCKED(bo); mtx_lock(&sync_mtx); if (bo->bo_flag & BO_ONWORKLST) LIST_REMOVE(bo, bo_synclist); else { bo->bo_flag |= BO_ONWORKLST; syncer_worklist_len++; } if (delay > syncer_maxdelay - 2) delay = syncer_maxdelay - 2; slot = (syncer_delayno + delay) & syncer_mask; LIST_INSERT_HEAD(&syncer_workitem_pending[slot], bo, bo_synclist); mtx_unlock(&sync_mtx); } static int sysctl_vfs_worklist_len(SYSCTL_HANDLER_ARGS) { int error, len; mtx_lock(&sync_mtx); len = syncer_worklist_len - sync_vnode_count; mtx_unlock(&sync_mtx); error = SYSCTL_OUT(req, &len, sizeof(len)); return (error); } SYSCTL_PROC(_vfs, OID_AUTO, worklist_len, CTLTYPE_INT | CTLFLAG_MPSAFE| CTLFLAG_RD, NULL, 0, sysctl_vfs_worklist_len, "I", "Syncer thread worklist length"); static struct proc *updateproc; static void sched_sync(void); static struct kproc_desc up_kp = { "syncer", sched_sync, &updateproc }; SYSINIT(syncer, SI_SUB_KTHREAD_UPDATE, SI_ORDER_FIRST, kproc_start, &up_kp); static int sync_vnode(struct synclist *slp, struct bufobj **bo, struct thread *td) { struct vnode *vp; struct mount *mp; *bo = LIST_FIRST(slp); if (*bo == NULL) return (0); vp = bo2vnode(*bo); if (VOP_ISLOCKED(vp) != 0 || VI_TRYLOCK(vp) == 0) return (1); /* * We use vhold in case the vnode does not * successfully sync. vhold prevents the vnode from * going away when we unlock the sync_mtx so that * we can acquire the vnode interlock. */ vholdl(vp); mtx_unlock(&sync_mtx); VI_UNLOCK(vp); if (vn_start_write(vp, &mp, V_NOWAIT) != 0) { vdrop(vp); mtx_lock(&sync_mtx); return (*bo == LIST_FIRST(slp)); } vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); (void) VOP_FSYNC(vp, MNT_LAZY, td); VOP_UNLOCK(vp); vn_finished_write(mp); BO_LOCK(*bo); if (((*bo)->bo_flag & BO_ONWORKLST) != 0) { /* * Put us back on the worklist. The worklist * routine will remove us from our current * position and then add us back in at a later * position. */ vn_syncer_add_to_worklist(*bo, syncdelay); } BO_UNLOCK(*bo); vdrop(vp); mtx_lock(&sync_mtx); return (0); } static int first_printf = 1; /* * System filesystem synchronizer daemon. */ static void sched_sync(void) { struct synclist *next, *slp; struct bufobj *bo; long starttime; struct thread *td = curthread; int last_work_seen; int net_worklist_len; int syncer_final_iter; int error; last_work_seen = 0; syncer_final_iter = 0; syncer_state = SYNCER_RUNNING; starttime = time_uptime; td->td_pflags |= TDP_NORUNNINGBUF; EVENTHANDLER_REGISTER(shutdown_pre_sync, syncer_shutdown, td->td_proc, SHUTDOWN_PRI_LAST); mtx_lock(&sync_mtx); for (;;) { if (syncer_state == SYNCER_FINAL_DELAY && syncer_final_iter == 0) { mtx_unlock(&sync_mtx); kproc_suspend_check(td->td_proc); mtx_lock(&sync_mtx); } net_worklist_len = syncer_worklist_len - sync_vnode_count; if (syncer_state != SYNCER_RUNNING && starttime != time_uptime) { if (first_printf) { printf("\nSyncing disks, vnodes remaining... "); first_printf = 0; } printf("%d ", net_worklist_len); } starttime = time_uptime; /* * Push files whose dirty time has expired. Be careful * of interrupt race on slp queue. * * Skip over empty worklist slots when shutting down. */ do { slp = &syncer_workitem_pending[syncer_delayno]; syncer_delayno += 1; if (syncer_delayno == syncer_maxdelay) syncer_delayno = 0; next = &syncer_workitem_pending[syncer_delayno]; /* * If the worklist has wrapped since the * it was emptied of all but syncer vnodes, * switch to the FINAL_DELAY state and run * for one more second. */ if (syncer_state == SYNCER_SHUTTING_DOWN && net_worklist_len == 0 && last_work_seen == syncer_delayno) { syncer_state = SYNCER_FINAL_DELAY; syncer_final_iter = SYNCER_SHUTDOWN_SPEEDUP; } } while (syncer_state != SYNCER_RUNNING && LIST_EMPTY(slp) && syncer_worklist_len > 0); /* * Keep track of the last time there was anything * on the worklist other than syncer vnodes. * Return to the SHUTTING_DOWN state if any * new work appears. */ if (net_worklist_len > 0 || syncer_state == SYNCER_RUNNING) last_work_seen = syncer_delayno; if (net_worklist_len > 0 && syncer_state == SYNCER_FINAL_DELAY) syncer_state = SYNCER_SHUTTING_DOWN; while (!LIST_EMPTY(slp)) { error = sync_vnode(slp, &bo, td); if (error == 1) { LIST_REMOVE(bo, bo_synclist); LIST_INSERT_HEAD(next, bo, bo_synclist); continue; } if (first_printf == 0) { /* * Drop the sync mutex, because some watchdog * drivers need to sleep while patting */ mtx_unlock(&sync_mtx); wdog_kern_pat(WD_LASTVAL); mtx_lock(&sync_mtx); } } if (syncer_state == SYNCER_FINAL_DELAY && syncer_final_iter > 0) syncer_final_iter--; /* * The variable rushjob allows the kernel to speed up the * processing of the filesystem syncer process. A rushjob * value of N tells the filesystem syncer to process the next * N seconds worth of work on its queue ASAP. Currently rushjob * is used by the soft update code to speed up the filesystem * syncer process when the incore state is getting so far * ahead of the disk that the kernel memory pool is being * threatened with exhaustion. */ if (rushjob > 0) { rushjob -= 1; continue; } /* * Just sleep for a short period of time between * iterations when shutting down to allow some I/O * to happen. * * If it has taken us less than a second to process the * current work, then wait. Otherwise start right over * again. We can still lose time if any single round * takes more than two seconds, but it does not really * matter as we are just trying to generally pace the * filesystem activity. */ if (syncer_state != SYNCER_RUNNING || time_uptime == starttime) { thread_lock(td); sched_prio(td, PPAUSE); thread_unlock(td); } if (syncer_state != SYNCER_RUNNING) cv_timedwait(&sync_wakeup, &sync_mtx, hz / SYNCER_SHUTDOWN_SPEEDUP); else if (time_uptime == starttime) cv_timedwait(&sync_wakeup, &sync_mtx, hz); } } /* * Request the syncer daemon to speed up its work. * We never push it to speed up more than half of its * normal turn time, otherwise it could take over the cpu. */ int speedup_syncer(void) { int ret = 0; mtx_lock(&sync_mtx); if (rushjob < syncdelay / 2) { rushjob += 1; stat_rush_requests += 1; ret = 1; } mtx_unlock(&sync_mtx); cv_broadcast(&sync_wakeup); return (ret); } /* * Tell the syncer to speed up its work and run though its work * list several times, then tell it to shut down. */ static void syncer_shutdown(void *arg, int howto) { if (howto & RB_NOSYNC) return; mtx_lock(&sync_mtx); syncer_state = SYNCER_SHUTTING_DOWN; rushjob = 0; mtx_unlock(&sync_mtx); cv_broadcast(&sync_wakeup); kproc_shutdown(arg, howto); } void syncer_suspend(void) { syncer_shutdown(updateproc, 0); } void syncer_resume(void) { mtx_lock(&sync_mtx); first_printf = 1; syncer_state = SYNCER_RUNNING; mtx_unlock(&sync_mtx); cv_broadcast(&sync_wakeup); kproc_resume(updateproc); } /* * Move the buffer between the clean and dirty lists of its vnode. */ void reassignbuf(struct buf *bp) { struct vnode *vp; struct bufobj *bo; int delay; #ifdef INVARIANTS struct bufv *bv; #endif vp = bp->b_vp; bo = bp->b_bufobj; KASSERT((bp->b_flags & B_PAGING) == 0, ("%s: cannot reassign paging buffer %p", __func__, bp)); CTR3(KTR_BUF, "reassignbuf(%p) vp %p flags %X", bp, bp->b_vp, bp->b_flags); BO_LOCK(bo); buf_vlist_remove(bp); /* * If dirty, put on list of dirty buffers; otherwise insert onto list * of clean buffers. */ if (bp->b_flags & B_DELWRI) { if ((bo->bo_flag & BO_ONWORKLST) == 0) { switch (vp->v_type) { case VDIR: delay = dirdelay; break; case VCHR: delay = metadelay; break; default: delay = filedelay; } vn_syncer_add_to_worklist(bo, delay); } buf_vlist_add(bp, bo, BX_VNDIRTY); } else { buf_vlist_add(bp, bo, BX_VNCLEAN); if ((bo->bo_flag & BO_ONWORKLST) && bo->bo_dirty.bv_cnt == 0) { mtx_lock(&sync_mtx); LIST_REMOVE(bo, bo_synclist); syncer_worklist_len--; mtx_unlock(&sync_mtx); bo->bo_flag &= ~BO_ONWORKLST; } } #ifdef INVARIANTS bv = &bo->bo_clean; bp = TAILQ_FIRST(&bv->bv_hd); KASSERT(bp == NULL || bp->b_bufobj == bo, ("bp %p wrong b_bufobj %p should be %p", bp, bp->b_bufobj, bo)); bp = TAILQ_LAST(&bv->bv_hd, buflists); KASSERT(bp == NULL || bp->b_bufobj == bo, ("bp %p wrong b_bufobj %p should be %p", bp, bp->b_bufobj, bo)); bv = &bo->bo_dirty; bp = TAILQ_FIRST(&bv->bv_hd); KASSERT(bp == NULL || bp->b_bufobj == bo, ("bp %p wrong b_bufobj %p should be %p", bp, bp->b_bufobj, bo)); bp = TAILQ_LAST(&bv->bv_hd, buflists); KASSERT(bp == NULL || bp->b_bufobj == bo, ("bp %p wrong b_bufobj %p should be %p", bp, bp->b_bufobj, bo)); #endif BO_UNLOCK(bo); } static void v_init_counters(struct vnode *vp) { VNASSERT(vp->v_type == VNON && vp->v_data == NULL && vp->v_iflag == 0, vp, ("%s called for an initialized vnode", __FUNCTION__)); ASSERT_VI_UNLOCKED(vp, __FUNCTION__); refcount_init(&vp->v_holdcnt, 1); refcount_init(&vp->v_usecount, 1); } /* * Increment si_usecount of the associated device, if any. */ static void v_incr_devcount(struct vnode *vp) { ASSERT_VI_LOCKED(vp, __FUNCTION__); if (vp->v_type == VCHR && vp->v_rdev != NULL) { dev_lock(); vp->v_rdev->si_usecount++; dev_unlock(); } } /* * Decrement si_usecount of the associated device, if any. * * The caller is required to hold the interlock when transitioning a VCHR use * count to zero. This prevents a race with devfs_reclaim_vchr() that would * leak a si_usecount reference. The vnode lock will also prevent this race * if it is held while dropping the last ref. * * The race is: * * CPU1 CPU2 * devfs_reclaim_vchr * make v_usecount == 0 * VI_LOCK * sees v_usecount == 0, no updates * vp->v_rdev = NULL; * ... * VI_UNLOCK * VI_LOCK * v_decr_devcount * sees v_rdev == NULL, no updates * * In this scenario si_devcount decrement is not performed. */ static void v_decr_devcount(struct vnode *vp) { ASSERT_VOP_LOCKED(vp, __func__); ASSERT_VI_LOCKED(vp, __FUNCTION__); if (vp->v_type == VCHR && vp->v_rdev != NULL) { dev_lock(); VNPASS(vp->v_rdev->si_usecount > 0, vp); vp->v_rdev->si_usecount--; dev_unlock(); } } /* * Grab a particular vnode from the free list, increment its * reference count and lock it. VIRF_DOOMED is set if the vnode * is being destroyed. Only callers who specify LK_RETRY will * see doomed vnodes. If inactive processing was delayed in * vput try to do it here. * * usecount is manipulated using atomics without holding any locks. * * holdcnt can be manipulated using atomics without holding any locks, * except when transitioning 1<->0, in which case the interlock is held. * * Consumers which don't guarantee liveness of the vnode can use SMR to * try to get a reference. Note this operation can fail since the vnode * may be awaiting getting freed by the time they get to it. */ enum vgetstate vget_prep_smr(struct vnode *vp) { enum vgetstate vs; VFS_SMR_ASSERT_ENTERED(); if (refcount_acquire_if_not_zero(&vp->v_usecount)) { vs = VGET_USECOUNT; } else { if (vhold_smr(vp)) vs = VGET_HOLDCNT; else vs = VGET_NONE; } return (vs); } enum vgetstate vget_prep(struct vnode *vp) { enum vgetstate vs; if (refcount_acquire_if_not_zero(&vp->v_usecount)) { vs = VGET_USECOUNT; } else { vhold(vp); vs = VGET_HOLDCNT; } return (vs); } void vget_abort(struct vnode *vp, enum vgetstate vs) { switch (vs) { case VGET_USECOUNT: vrele(vp); break; case VGET_HOLDCNT: vdrop(vp); break; default: __assert_unreachable(); } } int vget(struct vnode *vp, int flags, struct thread *td) { enum vgetstate vs; MPASS(td == curthread); vs = vget_prep(vp); return (vget_finish(vp, flags, vs)); } static void __noinline vget_finish_vchr(struct vnode *vp) { VNASSERT(vp->v_type == VCHR, vp, ("type != VCHR)")); /* * See the comment in vget_finish before usecount bump. */ if (refcount_acquire_if_not_zero(&vp->v_usecount)) { #ifdef INVARIANTS int old = atomic_fetchadd_int(&vp->v_holdcnt, -1); VNASSERT(old > 0, vp, ("%s: wrong hold count %d", __func__, old)); #else refcount_release(&vp->v_holdcnt); #endif return; } VI_LOCK(vp); if (refcount_acquire_if_not_zero(&vp->v_usecount)) { #ifdef INVARIANTS int old = atomic_fetchadd_int(&vp->v_holdcnt, -1); VNASSERT(old > 1, vp, ("%s: wrong hold count %d", __func__, old)); #else refcount_release(&vp->v_holdcnt); #endif VI_UNLOCK(vp); return; } v_incr_devcount(vp); refcount_acquire(&vp->v_usecount); VI_UNLOCK(vp); } int vget_finish(struct vnode *vp, int flags, enum vgetstate vs) { int error; if ((flags & LK_INTERLOCK) != 0) ASSERT_VI_LOCKED(vp, __func__); else ASSERT_VI_UNLOCKED(vp, __func__); VNPASS(vs == VGET_HOLDCNT || vs == VGET_USECOUNT, vp); VNPASS(vp->v_holdcnt > 0, vp); VNPASS(vs == VGET_HOLDCNT || vp->v_usecount > 0, vp); error = vn_lock(vp, flags); if (__predict_false(error != 0)) { vget_abort(vp, vs); CTR2(KTR_VFS, "%s: impossible to lock vnode %p", __func__, vp); return (error); } vget_finish_ref(vp, vs); return (0); } void vget_finish_ref(struct vnode *vp, enum vgetstate vs) { int old; VNPASS(vs == VGET_HOLDCNT || vs == VGET_USECOUNT, vp); VNPASS(vp->v_holdcnt > 0, vp); VNPASS(vs == VGET_HOLDCNT || vp->v_usecount > 0, vp); if (vs == VGET_USECOUNT) return; if (__predict_false(vp->v_type == VCHR)) { vget_finish_vchr(vp); return; } /* * We hold the vnode. If the usecount is 0 it will be utilized to keep * the vnode around. Otherwise someone else lended their hold count and * we have to drop ours. */ old = atomic_fetchadd_int(&vp->v_usecount, 1); VNASSERT(old >= 0, vp, ("%s: wrong use count %d", __func__, old)); if (old != 0) { #ifdef INVARIANTS old = atomic_fetchadd_int(&vp->v_holdcnt, -1); VNASSERT(old > 1, vp, ("%s: wrong hold count %d", __func__, old)); #else refcount_release(&vp->v_holdcnt); #endif } } /* * Increase the reference (use) and hold count of a vnode. * This will also remove the vnode from the free list if it is presently free. */ static void __noinline vref_vchr(struct vnode *vp, bool interlock) { /* * See the comment in vget_finish before usecount bump. */ if (!interlock) { if (refcount_acquire_if_not_zero(&vp->v_usecount)) { VNODE_REFCOUNT_FENCE_ACQ(); VNASSERT(vp->v_holdcnt > 0, vp, ("%s: active vnode not held", __func__)); return; } VI_LOCK(vp); /* * By the time we get here the vnode might have been doomed, at * which point the 0->1 use count transition is no longer * protected by the interlock. Since it can't bounce back to * VCHR and requires vref semantics, punt it back */ if (__predict_false(vp->v_type == VBAD)) { VI_UNLOCK(vp); vref(vp); return; } } VNASSERT(vp->v_type == VCHR, vp, ("type != VCHR)")); if (refcount_acquire_if_not_zero(&vp->v_usecount)) { VNODE_REFCOUNT_FENCE_ACQ(); VNASSERT(vp->v_holdcnt > 0, vp, ("%s: active vnode not held", __func__)); if (!interlock) VI_UNLOCK(vp); return; } vhold(vp); v_incr_devcount(vp); refcount_acquire(&vp->v_usecount); if (!interlock) VI_UNLOCK(vp); return; } void vref(struct vnode *vp) { int old; CTR2(KTR_VFS, "%s: vp %p", __func__, vp); if (__predict_false(vp->v_type == VCHR)) { vref_vchr(vp, false); return; } if (refcount_acquire_if_not_zero(&vp->v_usecount)) { VNODE_REFCOUNT_FENCE_ACQ(); VNASSERT(vp->v_holdcnt > 0, vp, ("%s: active vnode not held", __func__)); return; } vhold(vp); /* * See the comment in vget_finish. */ old = atomic_fetchadd_int(&vp->v_usecount, 1); VNASSERT(old >= 0, vp, ("%s: wrong use count %d", __func__, old)); if (old != 0) { #ifdef INVARIANTS old = atomic_fetchadd_int(&vp->v_holdcnt, -1); VNASSERT(old > 1, vp, ("%s: wrong hold count %d", __func__, old)); #else refcount_release(&vp->v_holdcnt); #endif } } void vrefl(struct vnode *vp) { ASSERT_VI_LOCKED(vp, __func__); CTR2(KTR_VFS, "%s: vp %p", __func__, vp); if (__predict_false(vp->v_type == VCHR)) { vref_vchr(vp, true); return; } vref(vp); } void vrefact(struct vnode *vp) { CTR2(KTR_VFS, "%s: vp %p", __func__, vp); #ifdef INVARIANTS int old = atomic_fetchadd_int(&vp->v_usecount, 1); VNASSERT(old > 0, vp, ("%s: wrong use count %d", __func__, old)); #else refcount_acquire(&vp->v_usecount); #endif } void vrefactn(struct vnode *vp, u_int n) { CTR2(KTR_VFS, "%s: vp %p", __func__, vp); #ifdef INVARIANTS int old = atomic_fetchadd_int(&vp->v_usecount, n); VNASSERT(old > 0, vp, ("%s: wrong use count %d", __func__, old)); #else atomic_add_int(&vp->v_usecount, n); #endif } /* * Return reference count of a vnode. * * The results of this call are only guaranteed when some mechanism is used to * stop other processes from gaining references to the vnode. This may be the * case if the caller holds the only reference. This is also useful when stale * data is acceptable as race conditions may be accounted for by some other * means. */ int vrefcnt(struct vnode *vp) { return (vp->v_usecount); } void vlazy(struct vnode *vp) { struct mount *mp; VNASSERT(vp->v_holdcnt > 0, vp, ("%s: vnode not held", __func__)); if ((vp->v_mflag & VMP_LAZYLIST) != 0) return; /* * We may get here for inactive routines after the vnode got doomed. */ if (VN_IS_DOOMED(vp)) return; mp = vp->v_mount; mtx_lock(&mp->mnt_listmtx); if ((vp->v_mflag & VMP_LAZYLIST) == 0) { vp->v_mflag |= VMP_LAZYLIST; TAILQ_INSERT_TAIL(&mp->mnt_lazyvnodelist, vp, v_lazylist); mp->mnt_lazyvnodelistsize++; } mtx_unlock(&mp->mnt_listmtx); } /* * This routine is only meant to be called from vgonel prior to dooming * the vnode. */ static void vunlazy_gone(struct vnode *vp) { struct mount *mp; ASSERT_VOP_ELOCKED(vp, __func__); ASSERT_VI_LOCKED(vp, __func__); VNPASS(!VN_IS_DOOMED(vp), vp); if (vp->v_mflag & VMP_LAZYLIST) { mp = vp->v_mount; mtx_lock(&mp->mnt_listmtx); VNPASS(vp->v_mflag & VMP_LAZYLIST, vp); vp->v_mflag &= ~VMP_LAZYLIST; TAILQ_REMOVE(&mp->mnt_lazyvnodelist, vp, v_lazylist); mp->mnt_lazyvnodelistsize--; mtx_unlock(&mp->mnt_listmtx); } } static void vdefer_inactive(struct vnode *vp) { ASSERT_VI_LOCKED(vp, __func__); VNASSERT(vp->v_holdcnt > 0, vp, ("%s: vnode without hold count", __func__)); if (VN_IS_DOOMED(vp)) { vdropl(vp); return; } if (vp->v_iflag & VI_DEFINACT) { VNASSERT(vp->v_holdcnt > 1, vp, ("lost hold count")); vdropl(vp); return; } if (vp->v_usecount > 0) { vp->v_iflag &= ~VI_OWEINACT; vdropl(vp); return; } vlazy(vp); vp->v_iflag |= VI_DEFINACT; VI_UNLOCK(vp); counter_u64_add(deferred_inact, 1); } static void vdefer_inactive_unlocked(struct vnode *vp) { VI_LOCK(vp); if ((vp->v_iflag & VI_OWEINACT) == 0) { vdropl(vp); return; } vdefer_inactive(vp); } enum vput_op { VRELE, VPUT, VUNREF }; /* * Handle ->v_usecount transitioning to 0. * * By releasing the last usecount we take ownership of the hold count which * provides liveness of the vnode, meaning we have to vdrop. * * If the vnode is of type VCHR we may need to decrement si_usecount, see * v_decr_devcount for details. * * For all vnodes we may need to perform inactive processing. It requires an * exclusive lock on the vnode, while it is legal to call here with only a * shared lock (or no locks). If locking the vnode in an expected manner fails, * inactive processing gets deferred to the syncer. * * XXX Some filesystems pass in an exclusively locked vnode and strongly depend * on the lock being held all the way until VOP_INACTIVE. This in particular * happens with UFS which adds half-constructed vnodes to the hash, where they * can be found by other code. */ static void vput_final(struct vnode *vp, enum vput_op func) { int error; bool want_unlock; CTR2(KTR_VFS, "%s: vp %p", __func__, vp); VNPASS(vp->v_holdcnt > 0, vp); VI_LOCK(vp); if (__predict_false(vp->v_type == VCHR && func != VRELE)) v_decr_devcount(vp); /* * By the time we got here someone else might have transitioned * the count back to > 0. */ if (vp->v_usecount > 0) goto out; /* * If the vnode is doomed vgone already performed inactive processing * (if needed). */ if (VN_IS_DOOMED(vp)) goto out; if (__predict_true(VOP_NEED_INACTIVE(vp) == 0)) goto out; if (vp->v_iflag & VI_DOINGINACT) goto out; /* * Locking operations here will drop the interlock and possibly the * vnode lock, opening a window where the vnode can get doomed all the * while ->v_usecount is 0. Set VI_OWEINACT to let vgone know to * perform inactive. */ vp->v_iflag |= VI_OWEINACT; want_unlock = false; error = 0; switch (func) { case VRELE: switch (VOP_ISLOCKED(vp)) { case LK_EXCLUSIVE: break; case LK_EXCLOTHER: case 0: want_unlock = true; error = vn_lock(vp, LK_EXCLUSIVE | LK_INTERLOCK); VI_LOCK(vp); break; default: /* * The lock has at least one sharer, but we have no way * to conclude whether this is us. Play it safe and * defer processing. */ error = EAGAIN; break; } break; case VPUT: want_unlock = true; if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { error = VOP_LOCK(vp, LK_UPGRADE | LK_INTERLOCK | LK_NOWAIT); VI_LOCK(vp); } break; case VUNREF: if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) { error = VOP_LOCK(vp, LK_TRYUPGRADE | LK_INTERLOCK); VI_LOCK(vp); } break; } if (error == 0) { vinactive(vp); if (want_unlock) VOP_UNLOCK(vp); vdropl(vp); } else { vdefer_inactive(vp); } return; out: if (func == VPUT) VOP_UNLOCK(vp); vdropl(vp); } /* * Decrement ->v_usecount for a vnode. * * Releasing the last use count requires additional processing, see vput_final * above for details. * * Note that releasing use count without the vnode lock requires special casing * for VCHR, see v_decr_devcount for details. * * Comment above each variant denotes lock state on entry and exit. */ static void __noinline vrele_vchr(struct vnode *vp) { if (refcount_release_if_not_last(&vp->v_usecount)) return; VI_LOCK(vp); if (!refcount_release(&vp->v_usecount)) { VI_UNLOCK(vp); return; } v_decr_devcount(vp); VI_UNLOCK(vp); vput_final(vp, VRELE); } /* * in: any * out: same as passed in */ void vrele(struct vnode *vp) { ASSERT_VI_UNLOCKED(vp, __func__); if (__predict_false(vp->v_type == VCHR)) { vrele_vchr(vp); return; } if (!refcount_release(&vp->v_usecount)) return; vput_final(vp, VRELE); } /* * in: locked * out: unlocked */ void vput(struct vnode *vp) { ASSERT_VOP_LOCKED(vp, __func__); ASSERT_VI_UNLOCKED(vp, __func__); if (!refcount_release(&vp->v_usecount)) { VOP_UNLOCK(vp); return; } vput_final(vp, VPUT); } /* * in: locked * out: locked */ void vunref(struct vnode *vp) { ASSERT_VOP_LOCKED(vp, __func__); ASSERT_VI_UNLOCKED(vp, __func__); if (!refcount_release(&vp->v_usecount)) return; vput_final(vp, VUNREF); } void vhold(struct vnode *vp) { struct vdbatch *vd; int old; CTR2(KTR_VFS, "%s: vp %p", __func__, vp); old = atomic_fetchadd_int(&vp->v_holdcnt, 1); VNASSERT(old >= 0 && (old & VHOLD_ALL_FLAGS) == 0, vp, ("%s: wrong hold count %d", __func__, old)); if (old != 0) return; critical_enter(); vd = DPCPU_PTR(vd); vd->freevnodes--; critical_exit(); } void vholdl(struct vnode *vp) { ASSERT_VI_LOCKED(vp, __func__); CTR2(KTR_VFS, "%s: vp %p", __func__, vp); vhold(vp); } void vholdnz(struct vnode *vp) { CTR2(KTR_VFS, "%s: vp %p", __func__, vp); #ifdef INVARIANTS int old = atomic_fetchadd_int(&vp->v_holdcnt, 1); VNASSERT(old > 0 && (old & VHOLD_ALL_FLAGS) == 0, vp, ("%s: wrong hold count %d", __func__, old)); #else atomic_add_int(&vp->v_holdcnt, 1); #endif } /* * Grab a hold count unless the vnode is freed. * * Only use this routine if vfs smr is the only protection you have against * freeing the vnode. * * The code loops trying to add a hold count as long as the VHOLD_NO_SMR flag * is not set. After the flag is set the vnode becomes immutable to anyone but * the thread which managed to set the flag. * * It may be tempting to replace the loop with: * count = atomic_fetchadd_int(&vp->v_holdcnt, 1); * if (count & VHOLD_NO_SMR) { * backpedal and error out; * } * * However, while this is more performant, it hinders debugging by eliminating * the previously mentioned invariant. */ bool vhold_smr(struct vnode *vp) { int count; VFS_SMR_ASSERT_ENTERED(); count = atomic_load_int(&vp->v_holdcnt); for (;;) { if (count & VHOLD_NO_SMR) { VNASSERT((count & ~VHOLD_NO_SMR) == 0, vp, ("non-zero hold count with flags %d\n", count)); return (false); } VNASSERT(count >= 0, vp, ("invalid hold count %d\n", count)); if (atomic_fcmpset_int(&vp->v_holdcnt, &count, count + 1)) return (true); } } static void __noinline vdbatch_process(struct vdbatch *vd) { struct vnode *vp; int i; mtx_assert(&vd->lock, MA_OWNED); MPASS(curthread->td_pinned > 0); MPASS(vd->index == VDBATCH_SIZE); mtx_lock(&vnode_list_mtx); critical_enter(); freevnodes += vd->freevnodes; for (i = 0; i < VDBATCH_SIZE; i++) { vp = vd->tab[i]; TAILQ_REMOVE(&vnode_list, vp, v_vnodelist); TAILQ_INSERT_TAIL(&vnode_list, vp, v_vnodelist); MPASS(vp->v_dbatchcpu != NOCPU); vp->v_dbatchcpu = NOCPU; } mtx_unlock(&vnode_list_mtx); vd->freevnodes = 0; bzero(vd->tab, sizeof(vd->tab)); vd->index = 0; critical_exit(); } static void vdbatch_enqueue(struct vnode *vp) { struct vdbatch *vd; ASSERT_VI_LOCKED(vp, __func__); VNASSERT(!VN_IS_DOOMED(vp), vp, ("%s: deferring requeue of a doomed vnode", __func__)); critical_enter(); vd = DPCPU_PTR(vd); vd->freevnodes++; if (vp->v_dbatchcpu != NOCPU) { VI_UNLOCK(vp); critical_exit(); return; } sched_pin(); critical_exit(); mtx_lock(&vd->lock); MPASS(vd->index < VDBATCH_SIZE); MPASS(vd->tab[vd->index] == NULL); /* * A hack: we depend on being pinned so that we know what to put in * ->v_dbatchcpu. */ vp->v_dbatchcpu = curcpu; vd->tab[vd->index] = vp; vd->index++; VI_UNLOCK(vp); if (vd->index == VDBATCH_SIZE) vdbatch_process(vd); mtx_unlock(&vd->lock); sched_unpin(); } /* * This routine must only be called for vnodes which are about to be * deallocated. Supporting dequeue for arbitrary vndoes would require * validating that the locked batch matches. */ static void vdbatch_dequeue(struct vnode *vp) { struct vdbatch *vd; int i; short cpu; VNASSERT(vp->v_type == VBAD || vp->v_type == VNON, vp, ("%s: called for a used vnode\n", __func__)); cpu = vp->v_dbatchcpu; if (cpu == NOCPU) return; vd = DPCPU_ID_PTR(cpu, vd); mtx_lock(&vd->lock); for (i = 0; i < vd->index; i++) { if (vd->tab[i] != vp) continue; vp->v_dbatchcpu = NOCPU; vd->index--; vd->tab[i] = vd->tab[vd->index]; vd->tab[vd->index] = NULL; break; } mtx_unlock(&vd->lock); /* * Either we dequeued the vnode above or the target CPU beat us to it. */ MPASS(vp->v_dbatchcpu == NOCPU); } /* * Drop the hold count of the vnode. If this is the last reference to * the vnode we place it on the free list unless it has been vgone'd * (marked VIRF_DOOMED) in which case we will free it. * * Because the vnode vm object keeps a hold reference on the vnode if * there is at least one resident non-cached page, the vnode cannot * leave the active list without the page cleanup done. */ static void vdrop_deactivate(struct vnode *vp) { struct mount *mp; ASSERT_VI_LOCKED(vp, __func__); /* * Mark a vnode as free: remove it from its active list * and put it up for recycling on the freelist. */ VNASSERT(!VN_IS_DOOMED(vp), vp, ("vdrop: returning doomed vnode")); VNASSERT(vp->v_op != NULL, vp, ("vdrop: vnode already reclaimed.")); VNASSERT((vp->v_iflag & VI_OWEINACT) == 0, vp, ("vnode with VI_OWEINACT set")); VNASSERT((vp->v_iflag & VI_DEFINACT) == 0, vp, ("vnode with VI_DEFINACT set")); if (vp->v_mflag & VMP_LAZYLIST) { mp = vp->v_mount; mtx_lock(&mp->mnt_listmtx); VNASSERT(vp->v_mflag & VMP_LAZYLIST, vp, ("lost VMP_LAZYLIST")); /* * Don't remove the vnode from the lazy list if another thread * has increased the hold count. It may have re-enqueued the * vnode to the lazy list and is now responsible for its * removal. */ if (vp->v_holdcnt == 0) { vp->v_mflag &= ~VMP_LAZYLIST; TAILQ_REMOVE(&mp->mnt_lazyvnodelist, vp, v_lazylist); mp->mnt_lazyvnodelistsize--; } mtx_unlock(&mp->mnt_listmtx); } vdbatch_enqueue(vp); } void vdrop(struct vnode *vp) { ASSERT_VI_UNLOCKED(vp, __func__); CTR2(KTR_VFS, "%s: vp %p", __func__, vp); if (refcount_release_if_not_last(&vp->v_holdcnt)) return; VI_LOCK(vp); vdropl(vp); } void vdropl(struct vnode *vp) { ASSERT_VI_LOCKED(vp, __func__); CTR2(KTR_VFS, "%s: vp %p", __func__, vp); if (!refcount_release(&vp->v_holdcnt)) { VI_UNLOCK(vp); return; } if (!VN_IS_DOOMED(vp)) { vdrop_deactivate(vp); + /* + * Also unlocks the interlock. We can't assert on it as we + * released our hold and by now the vnode might have been + * freed. + */ return; } /* - * We may be racing against vhold_smr. + * Set the VHOLD_NO_SMR flag. * - * If they win we can just pretend we never got this far, they will - * vdrop later. + * We may be racing against vhold_smr. If they win we can just pretend + * we never got this far, they will vdrop later. */ if (!atomic_cmpset_int(&vp->v_holdcnt, 0, VHOLD_NO_SMR)) { + VI_UNLOCK(vp); /* - * We lost the aforementioned race. Note that any subsequent - * access is invalid as they might have managed to vdropl on - * their own. + * We lost the aforementioned race. Any subsequent access is + * invalid as they might have managed to vdropl on their own. */ return; } freevnode(vp); } /* * Call VOP_INACTIVE on the vnode and manage the DOINGINACT and OWEINACT * flags. DOINGINACT prevents us from recursing in calls to vinactive. */ static void vinactivef(struct vnode *vp) { struct vm_object *obj; ASSERT_VOP_ELOCKED(vp, "vinactive"); ASSERT_VI_LOCKED(vp, "vinactive"); VNASSERT((vp->v_iflag & VI_DOINGINACT) == 0, vp, ("vinactive: recursed on VI_DOINGINACT")); CTR2(KTR_VFS, "%s: vp %p", __func__, vp); vp->v_iflag |= VI_DOINGINACT; vp->v_iflag &= ~VI_OWEINACT; VI_UNLOCK(vp); /* * Before moving off the active list, we must be sure that any * modified pages are converted into the vnode's dirty * buffers, since these will no longer be checked once the * vnode is on the inactive list. * * The write-out of the dirty pages is asynchronous. At the * point that VOP_INACTIVE() is called, there could still be * pending I/O and dirty pages in the object. */ if ((obj = vp->v_object) != NULL && (vp->v_vflag & VV_NOSYNC) == 0 && vm_object_mightbedirty(obj)) { VM_OBJECT_WLOCK(obj); vm_object_page_clean(obj, 0, 0, 0); VM_OBJECT_WUNLOCK(obj); } VOP_INACTIVE(vp, curthread); VI_LOCK(vp); VNASSERT(vp->v_iflag & VI_DOINGINACT, vp, ("vinactive: lost VI_DOINGINACT")); vp->v_iflag &= ~VI_DOINGINACT; } void vinactive(struct vnode *vp) { ASSERT_VOP_ELOCKED(vp, "vinactive"); ASSERT_VI_LOCKED(vp, "vinactive"); CTR2(KTR_VFS, "%s: vp %p", __func__, vp); if ((vp->v_iflag & VI_OWEINACT) == 0) return; if (vp->v_iflag & VI_DOINGINACT) return; if (vp->v_usecount > 0) { vp->v_iflag &= ~VI_OWEINACT; return; } vinactivef(vp); } /* * Remove any vnodes in the vnode table belonging to mount point mp. * * If FORCECLOSE is not specified, there should not be any active ones, * return error if any are found (nb: this is a user error, not a * system error). If FORCECLOSE is specified, detach any active vnodes * that are found. * * If WRITECLOSE is set, only flush out regular file vnodes open for * writing. * * SKIPSYSTEM causes any vnodes marked VV_SYSTEM to be skipped. * * `rootrefs' specifies the base reference count for the root vnode * of this filesystem. The root vnode is considered busy if its * v_usecount exceeds this value. On a successful return, vflush(, td) * will call vrele() on the root vnode exactly rootrefs times. * If the SKIPSYSTEM or WRITECLOSE flags are specified, rootrefs must * be zero. */ #ifdef DIAGNOSTIC static int busyprt = 0; /* print out busy vnodes */ SYSCTL_INT(_debug, OID_AUTO, busyprt, CTLFLAG_RW, &busyprt, 0, "Print out busy vnodes"); #endif int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td) { struct vnode *vp, *mvp, *rootvp = NULL; struct vattr vattr; int busy = 0, error; CTR4(KTR_VFS, "%s: mp %p with rootrefs %d and flags %d", __func__, mp, rootrefs, flags); if (rootrefs > 0) { KASSERT((flags & (SKIPSYSTEM | WRITECLOSE)) == 0, ("vflush: bad args")); /* * Get the filesystem root vnode. We can vput() it * immediately, since with rootrefs > 0, it won't go away. */ if ((error = VFS_ROOT(mp, LK_EXCLUSIVE, &rootvp)) != 0) { CTR2(KTR_VFS, "%s: vfs_root lookup failed with %d", __func__, error); return (error); } vput(rootvp); } loop: MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { vholdl(vp); error = vn_lock(vp, LK_INTERLOCK | LK_EXCLUSIVE); if (error) { vdrop(vp); MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); goto loop; } /* * Skip over a vnodes marked VV_SYSTEM. */ if ((flags & SKIPSYSTEM) && (vp->v_vflag & VV_SYSTEM)) { VOP_UNLOCK(vp); vdrop(vp); continue; } /* * If WRITECLOSE is set, flush out unlinked but still open * files (even if open only for reading) and regular file * vnodes open for writing. */ if (flags & WRITECLOSE) { if (vp->v_object != NULL) { VM_OBJECT_WLOCK(vp->v_object); vm_object_page_clean(vp->v_object, 0, 0, 0); VM_OBJECT_WUNLOCK(vp->v_object); } error = VOP_FSYNC(vp, MNT_WAIT, td); if (error != 0) { VOP_UNLOCK(vp); vdrop(vp); MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); return (error); } error = VOP_GETATTR(vp, &vattr, td->td_ucred); VI_LOCK(vp); if ((vp->v_type == VNON || (error == 0 && vattr.va_nlink > 0)) && (vp->v_writecount <= 0 || vp->v_type != VREG)) { VOP_UNLOCK(vp); vdropl(vp); continue; } } else VI_LOCK(vp); /* * With v_usecount == 0, all we need to do is clear out the * vnode data structures and we are done. * * If FORCECLOSE is set, forcibly close the vnode. */ if (vp->v_usecount == 0 || (flags & FORCECLOSE)) { vgonel(vp); } else { busy++; #ifdef DIAGNOSTIC if (busyprt) vn_printf(vp, "vflush: busy vnode "); #endif } VOP_UNLOCK(vp); vdropl(vp); } if (rootrefs > 0 && (flags & FORCECLOSE) == 0) { /* * If just the root vnode is busy, and if its refcount * is equal to `rootrefs', then go ahead and kill it. */ VI_LOCK(rootvp); KASSERT(busy > 0, ("vflush: not busy")); VNASSERT(rootvp->v_usecount >= rootrefs, rootvp, ("vflush: usecount %d < rootrefs %d", rootvp->v_usecount, rootrefs)); if (busy == 1 && rootvp->v_usecount == rootrefs) { VOP_LOCK(rootvp, LK_EXCLUSIVE|LK_INTERLOCK); vgone(rootvp); VOP_UNLOCK(rootvp); busy = 0; } else VI_UNLOCK(rootvp); } if (busy) { CTR2(KTR_VFS, "%s: failing as %d vnodes are busy", __func__, busy); return (EBUSY); } for (; rootrefs > 0; rootrefs--) vrele(rootvp); return (0); } /* * Recycle an unused vnode to the front of the free list. */ int vrecycle(struct vnode *vp) { int recycled; VI_LOCK(vp); recycled = vrecyclel(vp); VI_UNLOCK(vp); return (recycled); } /* * vrecycle, with the vp interlock held. */ int vrecyclel(struct vnode *vp) { int recycled; ASSERT_VOP_ELOCKED(vp, __func__); ASSERT_VI_LOCKED(vp, __func__); CTR2(KTR_VFS, "%s: vp %p", __func__, vp); recycled = 0; if (vp->v_usecount == 0) { recycled = 1; vgonel(vp); } return (recycled); } /* * Eliminate all activity associated with a vnode * in preparation for reuse. */ void vgone(struct vnode *vp) { VI_LOCK(vp); vgonel(vp); VI_UNLOCK(vp); } static void notify_lowervp_vfs_dummy(struct mount *mp __unused, struct vnode *lowervp __unused) { } /* * Notify upper mounts about reclaimed or unlinked vnode. */ void vfs_notify_upper(struct vnode *vp, int event) { static struct vfsops vgonel_vfsops = { .vfs_reclaim_lowervp = notify_lowervp_vfs_dummy, .vfs_unlink_lowervp = notify_lowervp_vfs_dummy, }; struct mount *mp, *ump, *mmp; mp = vp->v_mount; if (mp == NULL) return; if (TAILQ_EMPTY(&mp->mnt_uppers)) return; mmp = malloc(sizeof(struct mount), M_TEMP, M_WAITOK | M_ZERO); mmp->mnt_op = &vgonel_vfsops; mmp->mnt_kern_flag |= MNTK_MARKER; MNT_ILOCK(mp); mp->mnt_kern_flag |= MNTK_VGONE_UPPER; for (ump = TAILQ_FIRST(&mp->mnt_uppers); ump != NULL;) { if ((ump->mnt_kern_flag & MNTK_MARKER) != 0) { ump = TAILQ_NEXT(ump, mnt_upper_link); continue; } TAILQ_INSERT_AFTER(&mp->mnt_uppers, ump, mmp, mnt_upper_link); MNT_IUNLOCK(mp); switch (event) { case VFS_NOTIFY_UPPER_RECLAIM: VFS_RECLAIM_LOWERVP(ump, vp); break; case VFS_NOTIFY_UPPER_UNLINK: VFS_UNLINK_LOWERVP(ump, vp); break; default: KASSERT(0, ("invalid event %d", event)); break; } MNT_ILOCK(mp); ump = TAILQ_NEXT(mmp, mnt_upper_link); TAILQ_REMOVE(&mp->mnt_uppers, mmp, mnt_upper_link); } free(mmp, M_TEMP); mp->mnt_kern_flag &= ~MNTK_VGONE_UPPER; if ((mp->mnt_kern_flag & MNTK_VGONE_WAITER) != 0) { mp->mnt_kern_flag &= ~MNTK_VGONE_WAITER; wakeup(&mp->mnt_uppers); } MNT_IUNLOCK(mp); } /* * vgone, with the vp interlock held. */ static void vgonel(struct vnode *vp) { struct thread *td; struct mount *mp; vm_object_t object; bool active, oweinact; ASSERT_VOP_ELOCKED(vp, "vgonel"); ASSERT_VI_LOCKED(vp, "vgonel"); VNASSERT(vp->v_holdcnt, vp, ("vgonel: vp %p has no reference.", vp)); CTR2(KTR_VFS, "%s: vp %p", __func__, vp); td = curthread; /* * Don't vgonel if we're already doomed. */ if (vp->v_irflag & VIRF_DOOMED) return; /* * Paired with freevnode. */ vn_seqc_write_begin_locked(vp); vunlazy_gone(vp); vp->v_irflag |= VIRF_DOOMED; /* * Check to see if the vnode is in use. If so, we have to call * VOP_CLOSE() and VOP_INACTIVE(). */ active = vp->v_usecount > 0; oweinact = (vp->v_iflag & VI_OWEINACT) != 0; /* * If we need to do inactive VI_OWEINACT will be set. */ if (vp->v_iflag & VI_DEFINACT) { VNASSERT(vp->v_holdcnt > 1, vp, ("lost hold count")); vp->v_iflag &= ~VI_DEFINACT; vdropl(vp); } else { VNASSERT(vp->v_holdcnt > 0, vp, ("vnode without hold count")); VI_UNLOCK(vp); } vfs_notify_upper(vp, VFS_NOTIFY_UPPER_RECLAIM); /* * If purging an active vnode, it must be closed and * deactivated before being reclaimed. */ if (active) VOP_CLOSE(vp, FNONBLOCK, NOCRED, td); if (oweinact || active) { VI_LOCK(vp); vinactivef(vp); VI_UNLOCK(vp); } if (vp->v_type == VSOCK) vfs_unp_reclaim(vp); /* * Clean out any buffers associated with the vnode. * If the flush fails, just toss the buffers. */ mp = NULL; if (!TAILQ_EMPTY(&vp->v_bufobj.bo_dirty.bv_hd)) (void) vn_start_secondary_write(vp, &mp, V_WAIT); if (vinvalbuf(vp, V_SAVE, 0, 0) != 0) { while (vinvalbuf(vp, 0, 0, 0) != 0) ; } BO_LOCK(&vp->v_bufobj); KASSERT(TAILQ_EMPTY(&vp->v_bufobj.bo_dirty.bv_hd) && vp->v_bufobj.bo_dirty.bv_cnt == 0 && TAILQ_EMPTY(&vp->v_bufobj.bo_clean.bv_hd) && vp->v_bufobj.bo_clean.bv_cnt == 0, ("vp %p bufobj not invalidated", vp)); /* * For VMIO bufobj, BO_DEAD is set later, or in * vm_object_terminate() after the object's page queue is * flushed. */ object = vp->v_bufobj.bo_object; if (object == NULL) vp->v_bufobj.bo_flag |= BO_DEAD; BO_UNLOCK(&vp->v_bufobj); /* * Handle the VM part. Tmpfs handles v_object on its own (the * OBJT_VNODE check). Nullfs or other bypassing filesystems * should not touch the object borrowed from the lower vnode * (the handle check). */ if (object != NULL && object->type == OBJT_VNODE && object->handle == vp) vnode_destroy_vobject(vp); /* * Reclaim the vnode. */ if (VOP_RECLAIM(vp, td)) panic("vgone: cannot reclaim"); if (mp != NULL) vn_finished_secondary_write(mp); VNASSERT(vp->v_object == NULL, vp, ("vop_reclaim left v_object vp=%p", vp)); /* * Clear the advisory locks and wake up waiting threads. */ (void)VOP_ADVLOCKPURGE(vp); vp->v_lockf = NULL; /* * Delete from old mount point vnode list. */ delmntque(vp); cache_purge_vgone(vp); /* * Done with purge, reset to the standard lock and invalidate * the vnode. */ VI_LOCK(vp); vp->v_vnlock = &vp->v_lock; vp->v_op = &dead_vnodeops; vp->v_type = VBAD; } /* * Calculate the total number of references to a special device. */ int vcount(struct vnode *vp) { int count; dev_lock(); count = vp->v_rdev->si_usecount; dev_unlock(); return (count); } /* * Print out a description of a vnode. */ static const char * const typename[] = {"VNON", "VREG", "VDIR", "VBLK", "VCHR", "VLNK", "VSOCK", "VFIFO", "VBAD", "VMARKER"}; _Static_assert((VHOLD_ALL_FLAGS & ~VHOLD_NO_SMR) == 0, "new hold count flag not added to vn_printf"); void vn_printf(struct vnode *vp, const char *fmt, ...) { va_list ap; char buf[256], buf2[16]; u_long flags; u_int holdcnt; va_start(ap, fmt); vprintf(fmt, ap); va_end(ap); printf("%p: ", (void *)vp); printf("type %s\n", typename[vp->v_type]); holdcnt = atomic_load_int(&vp->v_holdcnt); printf(" usecount %d, writecount %d, refcount %d seqc users %d", vp->v_usecount, vp->v_writecount, holdcnt & ~VHOLD_ALL_FLAGS, vp->v_seqc_users); switch (vp->v_type) { case VDIR: printf(" mountedhere %p\n", vp->v_mountedhere); break; case VCHR: printf(" rdev %p\n", vp->v_rdev); break; case VSOCK: printf(" socket %p\n", vp->v_unpcb); break; case VFIFO: printf(" fifoinfo %p\n", vp->v_fifoinfo); break; default: printf("\n"); break; } buf[0] = '\0'; buf[1] = '\0'; if (holdcnt & VHOLD_NO_SMR) strlcat(buf, "|VHOLD_NO_SMR", sizeof(buf)); printf(" hold count flags (%s)\n", buf + 1); buf[0] = '\0'; buf[1] = '\0'; if (vp->v_irflag & VIRF_DOOMED) strlcat(buf, "|VIRF_DOOMED", sizeof(buf)); flags = vp->v_irflag & ~(VIRF_DOOMED); if (flags != 0) { snprintf(buf2, sizeof(buf2), "|VIRF(0x%lx)", flags); strlcat(buf, buf2, sizeof(buf)); } if (vp->v_vflag & VV_ROOT) strlcat(buf, "|VV_ROOT", sizeof(buf)); if (vp->v_vflag & VV_ISTTY) strlcat(buf, "|VV_ISTTY", sizeof(buf)); if (vp->v_vflag & VV_NOSYNC) strlcat(buf, "|VV_NOSYNC", sizeof(buf)); if (vp->v_vflag & VV_ETERNALDEV) strlcat(buf, "|VV_ETERNALDEV", sizeof(buf)); if (vp->v_vflag & VV_CACHEDLABEL) strlcat(buf, "|VV_CACHEDLABEL", sizeof(buf)); if (vp->v_vflag & VV_VMSIZEVNLOCK) strlcat(buf, "|VV_VMSIZEVNLOCK", sizeof(buf)); if (vp->v_vflag & VV_COPYONWRITE) strlcat(buf, "|VV_COPYONWRITE", sizeof(buf)); if (vp->v_vflag & VV_SYSTEM) strlcat(buf, "|VV_SYSTEM", sizeof(buf)); if (vp->v_vflag & VV_PROCDEP) strlcat(buf, "|VV_PROCDEP", sizeof(buf)); if (vp->v_vflag & VV_NOKNOTE) strlcat(buf, "|VV_NOKNOTE", sizeof(buf)); if (vp->v_vflag & VV_DELETED) strlcat(buf, "|VV_DELETED", sizeof(buf)); if (vp->v_vflag & VV_MD) strlcat(buf, "|VV_MD", sizeof(buf)); if (vp->v_vflag & VV_FORCEINSMQ) strlcat(buf, "|VV_FORCEINSMQ", sizeof(buf)); if (vp->v_vflag & VV_READLINK) strlcat(buf, "|VV_READLINK", sizeof(buf)); flags = vp->v_vflag & ~(VV_ROOT | VV_ISTTY | VV_NOSYNC | VV_ETERNALDEV | VV_CACHEDLABEL | VV_COPYONWRITE | VV_SYSTEM | VV_PROCDEP | VV_NOKNOTE | VV_DELETED | VV_MD | VV_FORCEINSMQ); if (flags != 0) { snprintf(buf2, sizeof(buf2), "|VV(0x%lx)", flags); strlcat(buf, buf2, sizeof(buf)); } if (vp->v_iflag & VI_TEXT_REF) strlcat(buf, "|VI_TEXT_REF", sizeof(buf)); if (vp->v_iflag & VI_MOUNT) strlcat(buf, "|VI_MOUNT", sizeof(buf)); if (vp->v_iflag & VI_DOINGINACT) strlcat(buf, "|VI_DOINGINACT", sizeof(buf)); if (vp->v_iflag & VI_OWEINACT) strlcat(buf, "|VI_OWEINACT", sizeof(buf)); if (vp->v_iflag & VI_DEFINACT) strlcat(buf, "|VI_DEFINACT", sizeof(buf)); flags = vp->v_iflag & ~(VI_TEXT_REF | VI_MOUNT | VI_DOINGINACT | VI_OWEINACT | VI_DEFINACT); if (flags != 0) { snprintf(buf2, sizeof(buf2), "|VI(0x%lx)", flags); strlcat(buf, buf2, sizeof(buf)); } if (vp->v_mflag & VMP_LAZYLIST) strlcat(buf, "|VMP_LAZYLIST", sizeof(buf)); flags = vp->v_mflag & ~(VMP_LAZYLIST); if (flags != 0) { snprintf(buf2, sizeof(buf2), "|VMP(0x%lx)", flags); strlcat(buf, buf2, sizeof(buf)); } printf(" flags (%s)\n", buf + 1); if (mtx_owned(VI_MTX(vp))) printf(" VI_LOCKed"); if (vp->v_object != NULL) printf(" v_object %p ref %d pages %d " "cleanbuf %d dirtybuf %d\n", vp->v_object, vp->v_object->ref_count, vp->v_object->resident_page_count, vp->v_bufobj.bo_clean.bv_cnt, vp->v_bufobj.bo_dirty.bv_cnt); printf(" "); lockmgr_printinfo(vp->v_vnlock); if (vp->v_data != NULL) VOP_PRINT(vp); } #ifdef DDB /* * List all of the locked vnodes in the system. * Called when debugging the kernel. */ DB_SHOW_COMMAND(lockedvnods, lockedvnodes) { struct mount *mp; struct vnode *vp; /* * Note: because this is DDB, we can't obey the locking semantics * for these structures, which means we could catch an inconsistent * state and dereference a nasty pointer. Not much to be done * about that. */ db_printf("Locked vnodes\n"); TAILQ_FOREACH(mp, &mountlist, mnt_list) { TAILQ_FOREACH(vp, &mp->mnt_nvnodelist, v_nmntvnodes) { if (vp->v_type != VMARKER && VOP_ISLOCKED(vp)) vn_printf(vp, "vnode "); } } } /* * Show details about the given vnode. */ DB_SHOW_COMMAND(vnode, db_show_vnode) { struct vnode *vp; if (!have_addr) return; vp = (struct vnode *)addr; vn_printf(vp, "vnode "); } /* * Show details about the given mount point. */ DB_SHOW_COMMAND(mount, db_show_mount) { struct mount *mp; struct vfsopt *opt; struct statfs *sp; struct vnode *vp; char buf[512]; uint64_t mflags; u_int flags; if (!have_addr) { /* No address given, print short info about all mount points. */ TAILQ_FOREACH(mp, &mountlist, mnt_list) { db_printf("%p %s on %s (%s)\n", mp, mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname, mp->mnt_stat.f_fstypename); if (db_pager_quit) break; } db_printf("\nMore info: show mount \n"); return; } mp = (struct mount *)addr; db_printf("%p %s on %s (%s)\n", mp, mp->mnt_stat.f_mntfromname, mp->mnt_stat.f_mntonname, mp->mnt_stat.f_fstypename); buf[0] = '\0'; mflags = mp->mnt_flag; #define MNT_FLAG(flag) do { \ if (mflags & (flag)) { \ if (buf[0] != '\0') \ strlcat(buf, ", ", sizeof(buf)); \ strlcat(buf, (#flag) + 4, sizeof(buf)); \ mflags &= ~(flag); \ } \ } while (0) MNT_FLAG(MNT_RDONLY); MNT_FLAG(MNT_SYNCHRONOUS); MNT_FLAG(MNT_NOEXEC); MNT_FLAG(MNT_NOSUID); MNT_FLAG(MNT_NFS4ACLS); MNT_FLAG(MNT_UNION); MNT_FLAG(MNT_ASYNC); MNT_FLAG(MNT_SUIDDIR); MNT_FLAG(MNT_SOFTDEP); MNT_FLAG(MNT_NOSYMFOLLOW); MNT_FLAG(MNT_GJOURNAL); MNT_FLAG(MNT_MULTILABEL); MNT_FLAG(MNT_ACLS); MNT_FLAG(MNT_NOATIME); MNT_FLAG(MNT_NOCLUSTERR); MNT_FLAG(MNT_NOCLUSTERW); MNT_FLAG(MNT_SUJ); MNT_FLAG(MNT_EXRDONLY); MNT_FLAG(MNT_EXPORTED); MNT_FLAG(MNT_DEFEXPORTED); MNT_FLAG(MNT_EXPORTANON); MNT_FLAG(MNT_EXKERB); MNT_FLAG(MNT_EXPUBLIC); MNT_FLAG(MNT_LOCAL); MNT_FLAG(MNT_QUOTA); MNT_FLAG(MNT_ROOTFS); MNT_FLAG(MNT_USER); MNT_FLAG(MNT_IGNORE); MNT_FLAG(MNT_UPDATE); MNT_FLAG(MNT_DELEXPORT); MNT_FLAG(MNT_RELOAD); MNT_FLAG(MNT_FORCE); MNT_FLAG(MNT_SNAPSHOT); MNT_FLAG(MNT_BYFSID); #undef MNT_FLAG if (mflags != 0) { if (buf[0] != '\0') strlcat(buf, ", ", sizeof(buf)); snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "0x%016jx", mflags); } db_printf(" mnt_flag = %s\n", buf); buf[0] = '\0'; flags = mp->mnt_kern_flag; #define MNT_KERN_FLAG(flag) do { \ if (flags & (flag)) { \ if (buf[0] != '\0') \ strlcat(buf, ", ", sizeof(buf)); \ strlcat(buf, (#flag) + 5, sizeof(buf)); \ flags &= ~(flag); \ } \ } while (0) MNT_KERN_FLAG(MNTK_UNMOUNTF); MNT_KERN_FLAG(MNTK_ASYNC); MNT_KERN_FLAG(MNTK_SOFTDEP); MNT_KERN_FLAG(MNTK_DRAINING); MNT_KERN_FLAG(MNTK_REFEXPIRE); MNT_KERN_FLAG(MNTK_EXTENDED_SHARED); MNT_KERN_FLAG(MNTK_SHARED_WRITES); MNT_KERN_FLAG(MNTK_NO_IOPF); MNT_KERN_FLAG(MNTK_VGONE_UPPER); MNT_KERN_FLAG(MNTK_VGONE_WAITER); MNT_KERN_FLAG(MNTK_LOOKUP_EXCL_DOTDOT); MNT_KERN_FLAG(MNTK_MARKER); MNT_KERN_FLAG(MNTK_USES_BCACHE); MNT_KERN_FLAG(MNTK_FPLOOKUP); MNT_KERN_FLAG(MNTK_NOASYNC); MNT_KERN_FLAG(MNTK_UNMOUNT); MNT_KERN_FLAG(MNTK_MWAIT); MNT_KERN_FLAG(MNTK_SUSPEND); MNT_KERN_FLAG(MNTK_SUSPEND2); MNT_KERN_FLAG(MNTK_SUSPENDED); MNT_KERN_FLAG(MNTK_LOOKUP_SHARED); MNT_KERN_FLAG(MNTK_NOKNOTE); #undef MNT_KERN_FLAG if (flags != 0) { if (buf[0] != '\0') strlcat(buf, ", ", sizeof(buf)); snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "0x%08x", flags); } db_printf(" mnt_kern_flag = %s\n", buf); db_printf(" mnt_opt = "); opt = TAILQ_FIRST(mp->mnt_opt); if (opt != NULL) { db_printf("%s", opt->name); opt = TAILQ_NEXT(opt, link); while (opt != NULL) { db_printf(", %s", opt->name); opt = TAILQ_NEXT(opt, link); } } db_printf("\n"); sp = &mp->mnt_stat; db_printf(" mnt_stat = { version=%u type=%u flags=0x%016jx " "bsize=%ju iosize=%ju blocks=%ju bfree=%ju bavail=%jd files=%ju " "ffree=%jd syncwrites=%ju asyncwrites=%ju syncreads=%ju " "asyncreads=%ju namemax=%u owner=%u fsid=[%d, %d] }\n", (u_int)sp->f_version, (u_int)sp->f_type, (uintmax_t)sp->f_flags, (uintmax_t)sp->f_bsize, (uintmax_t)sp->f_iosize, (uintmax_t)sp->f_blocks, (uintmax_t)sp->f_bfree, (intmax_t)sp->f_bavail, (uintmax_t)sp->f_files, (intmax_t)sp->f_ffree, (uintmax_t)sp->f_syncwrites, (uintmax_t)sp->f_asyncwrites, (uintmax_t)sp->f_syncreads, (uintmax_t)sp->f_asyncreads, (u_int)sp->f_namemax, (u_int)sp->f_owner, (int)sp->f_fsid.val[0], (int)sp->f_fsid.val[1]); db_printf(" mnt_cred = { uid=%u ruid=%u", (u_int)mp->mnt_cred->cr_uid, (u_int)mp->mnt_cred->cr_ruid); if (jailed(mp->mnt_cred)) db_printf(", jail=%d", mp->mnt_cred->cr_prison->pr_id); db_printf(" }\n"); db_printf(" mnt_ref = %d (with %d in the struct)\n", vfs_mount_fetch_counter(mp, MNT_COUNT_REF), mp->mnt_ref); db_printf(" mnt_gen = %d\n", mp->mnt_gen); db_printf(" mnt_nvnodelistsize = %d\n", mp->mnt_nvnodelistsize); db_printf(" mnt_lazyvnodelistsize = %d\n", mp->mnt_lazyvnodelistsize); db_printf(" mnt_writeopcount = %d (with %d in the struct)\n", vfs_mount_fetch_counter(mp, MNT_COUNT_WRITEOPCOUNT), mp->mnt_writeopcount); db_printf(" mnt_maxsymlinklen = %d\n", mp->mnt_maxsymlinklen); db_printf(" mnt_iosize_max = %d\n", mp->mnt_iosize_max); db_printf(" mnt_hashseed = %u\n", mp->mnt_hashseed); db_printf(" mnt_lockref = %d (with %d in the struct)\n", vfs_mount_fetch_counter(mp, MNT_COUNT_LOCKREF), mp->mnt_lockref); db_printf(" mnt_secondary_writes = %d\n", mp->mnt_secondary_writes); db_printf(" mnt_secondary_accwrites = %d\n", mp->mnt_secondary_accwrites); db_printf(" mnt_gjprovider = %s\n", mp->mnt_gjprovider != NULL ? mp->mnt_gjprovider : "NULL"); db_printf(" mnt_vfs_ops = %d\n", mp->mnt_vfs_ops); db_printf("\n\nList of active vnodes\n"); TAILQ_FOREACH(vp, &mp->mnt_nvnodelist, v_nmntvnodes) { if (vp->v_type != VMARKER && vp->v_holdcnt > 0) { vn_printf(vp, "vnode "); if (db_pager_quit) break; } } db_printf("\n\nList of inactive vnodes\n"); TAILQ_FOREACH(vp, &mp->mnt_nvnodelist, v_nmntvnodes) { if (vp->v_type != VMARKER && vp->v_holdcnt == 0) { vn_printf(vp, "vnode "); if (db_pager_quit) break; } } } #endif /* DDB */ /* * Fill in a struct xvfsconf based on a struct vfsconf. */ static int vfsconf2x(struct sysctl_req *req, struct vfsconf *vfsp) { struct xvfsconf xvfsp; bzero(&xvfsp, sizeof(xvfsp)); strcpy(xvfsp.vfc_name, vfsp->vfc_name); xvfsp.vfc_typenum = vfsp->vfc_typenum; xvfsp.vfc_refcount = vfsp->vfc_refcount; xvfsp.vfc_flags = vfsp->vfc_flags; /* * These are unused in userland, we keep them * to not break binary compatibility. */ xvfsp.vfc_vfsops = NULL; xvfsp.vfc_next = NULL; return (SYSCTL_OUT(req, &xvfsp, sizeof(xvfsp))); } #ifdef COMPAT_FREEBSD32 struct xvfsconf32 { uint32_t vfc_vfsops; char vfc_name[MFSNAMELEN]; int32_t vfc_typenum; int32_t vfc_refcount; int32_t vfc_flags; uint32_t vfc_next; }; static int vfsconf2x32(struct sysctl_req *req, struct vfsconf *vfsp) { struct xvfsconf32 xvfsp; bzero(&xvfsp, sizeof(xvfsp)); strcpy(xvfsp.vfc_name, vfsp->vfc_name); xvfsp.vfc_typenum = vfsp->vfc_typenum; xvfsp.vfc_refcount = vfsp->vfc_refcount; xvfsp.vfc_flags = vfsp->vfc_flags; return (SYSCTL_OUT(req, &xvfsp, sizeof(xvfsp))); } #endif /* * Top level filesystem related information gathering. */ static int sysctl_vfs_conflist(SYSCTL_HANDLER_ARGS) { struct vfsconf *vfsp; int error; error = 0; vfsconf_slock(); TAILQ_FOREACH(vfsp, &vfsconf, vfc_list) { #ifdef COMPAT_FREEBSD32 if (req->flags & SCTL_MASK32) error = vfsconf2x32(req, vfsp); else #endif error = vfsconf2x(req, vfsp); if (error) break; } vfsconf_sunlock(); return (error); } SYSCTL_PROC(_vfs, OID_AUTO, conflist, CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, sysctl_vfs_conflist, "S,xvfsconf", "List of all configured filesystems"); #ifndef BURN_BRIDGES static int sysctl_ovfs_conf(SYSCTL_HANDLER_ARGS); static int vfs_sysctl(SYSCTL_HANDLER_ARGS) { int *name = (int *)arg1 - 1; /* XXX */ u_int namelen = arg2 + 1; /* XXX */ struct vfsconf *vfsp; log(LOG_WARNING, "userland calling deprecated sysctl, " "please rebuild world\n"); #if 1 || defined(COMPAT_PRELITE2) /* Resolve ambiguity between VFS_VFSCONF and VFS_GENERIC. */ if (namelen == 1) return (sysctl_ovfs_conf(oidp, arg1, arg2, req)); #endif switch (name[1]) { case VFS_MAXTYPENUM: if (namelen != 2) return (ENOTDIR); return (SYSCTL_OUT(req, &maxvfsconf, sizeof(int))); case VFS_CONF: if (namelen != 3) return (ENOTDIR); /* overloaded */ vfsconf_slock(); TAILQ_FOREACH(vfsp, &vfsconf, vfc_list) { if (vfsp->vfc_typenum == name[2]) break; } vfsconf_sunlock(); if (vfsp == NULL) return (EOPNOTSUPP); #ifdef COMPAT_FREEBSD32 if (req->flags & SCTL_MASK32) return (vfsconf2x32(req, vfsp)); else #endif return (vfsconf2x(req, vfsp)); } return (EOPNOTSUPP); } static SYSCTL_NODE(_vfs, VFS_GENERIC, generic, CTLFLAG_RD | CTLFLAG_SKIP | CTLFLAG_MPSAFE, vfs_sysctl, "Generic filesystem"); #if 1 || defined(COMPAT_PRELITE2) static int sysctl_ovfs_conf(SYSCTL_HANDLER_ARGS) { int error; struct vfsconf *vfsp; struct ovfsconf ovfs; vfsconf_slock(); TAILQ_FOREACH(vfsp, &vfsconf, vfc_list) { bzero(&ovfs, sizeof(ovfs)); ovfs.vfc_vfsops = vfsp->vfc_vfsops; /* XXX used as flag */ strcpy(ovfs.vfc_name, vfsp->vfc_name); ovfs.vfc_index = vfsp->vfc_typenum; ovfs.vfc_refcount = vfsp->vfc_refcount; ovfs.vfc_flags = vfsp->vfc_flags; error = SYSCTL_OUT(req, &ovfs, sizeof ovfs); if (error != 0) { vfsconf_sunlock(); return (error); } } vfsconf_sunlock(); return (0); } #endif /* 1 || COMPAT_PRELITE2 */ #endif /* !BURN_BRIDGES */ #define KINFO_VNODESLOP 10 #ifdef notyet /* * Dump vnode list (via sysctl). */ /* ARGSUSED */ static int sysctl_vnode(SYSCTL_HANDLER_ARGS) { struct xvnode *xvn; struct mount *mp; struct vnode *vp; int error, len, n; /* * Stale numvnodes access is not fatal here. */ req->lock = 0; len = (numvnodes + KINFO_VNODESLOP) * sizeof *xvn; if (!req->oldptr) /* Make an estimate */ return (SYSCTL_OUT(req, 0, len)); error = sysctl_wire_old_buffer(req, 0); if (error != 0) return (error); xvn = malloc(len, M_TEMP, M_ZERO | M_WAITOK); n = 0; mtx_lock(&mountlist_mtx); TAILQ_FOREACH(mp, &mountlist, mnt_list) { if (vfs_busy(mp, MBF_NOWAIT | MBF_MNTLSTLOCK)) continue; MNT_ILOCK(mp); TAILQ_FOREACH(vp, &mp->mnt_nvnodelist, v_nmntvnodes) { if (n == len) break; vref(vp); xvn[n].xv_size = sizeof *xvn; xvn[n].xv_vnode = vp; xvn[n].xv_id = 0; /* XXX compat */ #define XV_COPY(field) xvn[n].xv_##field = vp->v_##field XV_COPY(usecount); XV_COPY(writecount); XV_COPY(holdcnt); XV_COPY(mount); XV_COPY(numoutput); XV_COPY(type); #undef XV_COPY xvn[n].xv_flag = vp->v_vflag; switch (vp->v_type) { case VREG: case VDIR: case VLNK: break; case VBLK: case VCHR: if (vp->v_rdev == NULL) { vrele(vp); continue; } xvn[n].xv_dev = dev2udev(vp->v_rdev); break; case VSOCK: xvn[n].xv_socket = vp->v_socket; break; case VFIFO: xvn[n].xv_fifo = vp->v_fifoinfo; break; case VNON: case VBAD: default: /* shouldn't happen? */ vrele(vp); continue; } vrele(vp); ++n; } MNT_IUNLOCK(mp); mtx_lock(&mountlist_mtx); vfs_unbusy(mp); if (n == len) break; } mtx_unlock(&mountlist_mtx); error = SYSCTL_OUT(req, xvn, n * sizeof *xvn); free(xvn, M_TEMP); return (error); } SYSCTL_PROC(_kern, KERN_VNODE, vnode, CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 0, sysctl_vnode, "S,xvnode", ""); #endif static void unmount_or_warn(struct mount *mp) { int error; error = dounmount(mp, MNT_FORCE, curthread); if (error != 0) { printf("unmount of %s failed (", mp->mnt_stat.f_mntonname); if (error == EBUSY) printf("BUSY)\n"); else printf("%d)\n", error); } } /* * Unmount all filesystems. The list is traversed in reverse order * of mounting to avoid dependencies. */ void vfs_unmountall(void) { struct mount *mp, *tmp; CTR1(KTR_VFS, "%s: unmounting all filesystems", __func__); /* * Since this only runs when rebooting, it is not interlocked. */ TAILQ_FOREACH_REVERSE_SAFE(mp, &mountlist, mntlist, mnt_list, tmp) { vfs_ref(mp); /* * Forcibly unmounting "/dev" before "/" would prevent clean * unmount of the latter. */ if (mp == rootdevmp) continue; unmount_or_warn(mp); } if (rootdevmp != NULL) unmount_or_warn(rootdevmp); } static void vfs_deferred_inactive(struct vnode *vp, int lkflags) { ASSERT_VI_LOCKED(vp, __func__); VNASSERT((vp->v_iflag & VI_DEFINACT) == 0, vp, ("VI_DEFINACT still set")); if ((vp->v_iflag & VI_OWEINACT) == 0) { vdropl(vp); return; } if (vn_lock(vp, lkflags) == 0) { VI_LOCK(vp); vinactive(vp); VOP_UNLOCK(vp); vdropl(vp); return; } vdefer_inactive_unlocked(vp); } static int vfs_periodic_inactive_filter(struct vnode *vp, void *arg) { return (vp->v_iflag & VI_DEFINACT); } static void __noinline vfs_periodic_inactive(struct mount *mp, int flags) { struct vnode *vp, *mvp; int lkflags; lkflags = LK_EXCLUSIVE | LK_INTERLOCK; if (flags != MNT_WAIT) lkflags |= LK_NOWAIT; MNT_VNODE_FOREACH_LAZY(vp, mp, mvp, vfs_periodic_inactive_filter, NULL) { if ((vp->v_iflag & VI_DEFINACT) == 0) { VI_UNLOCK(vp); continue; } vp->v_iflag &= ~VI_DEFINACT; vfs_deferred_inactive(vp, lkflags); } } static inline bool vfs_want_msync(struct vnode *vp) { struct vm_object *obj; /* * This test may be performed without any locks held. * We rely on vm_object's type stability. */ if (vp->v_vflag & VV_NOSYNC) return (false); obj = vp->v_object; return (obj != NULL && vm_object_mightbedirty(obj)); } static int vfs_periodic_msync_inactive_filter(struct vnode *vp, void *arg __unused) { if (vp->v_vflag & VV_NOSYNC) return (false); if (vp->v_iflag & VI_DEFINACT) return (true); return (vfs_want_msync(vp)); } static void __noinline vfs_periodic_msync_inactive(struct mount *mp, int flags) { struct vnode *vp, *mvp; struct vm_object *obj; struct thread *td; int lkflags, objflags; bool seen_defer; td = curthread; lkflags = LK_EXCLUSIVE | LK_INTERLOCK; if (flags != MNT_WAIT) { lkflags |= LK_NOWAIT; objflags = OBJPC_NOSYNC; } else { objflags = OBJPC_SYNC; } MNT_VNODE_FOREACH_LAZY(vp, mp, mvp, vfs_periodic_msync_inactive_filter, NULL) { seen_defer = false; if (vp->v_iflag & VI_DEFINACT) { vp->v_iflag &= ~VI_DEFINACT; seen_defer = true; } if (!vfs_want_msync(vp)) { if (seen_defer) vfs_deferred_inactive(vp, lkflags); else VI_UNLOCK(vp); continue; } if (vget(vp, lkflags, td) == 0) { obj = vp->v_object; if (obj != NULL && (vp->v_vflag & VV_NOSYNC) == 0) { VM_OBJECT_WLOCK(obj); vm_object_page_clean(obj, 0, 0, objflags); VM_OBJECT_WUNLOCK(obj); } vput(vp); if (seen_defer) vdrop(vp); } else { if (seen_defer) vdefer_inactive_unlocked(vp); } } } void vfs_periodic(struct mount *mp, int flags) { CTR2(KTR_VFS, "%s: mp %p", __func__, mp); if ((mp->mnt_kern_flag & MNTK_NOMSYNC) != 0) vfs_periodic_inactive(mp, flags); else vfs_periodic_msync_inactive(mp, flags); } static void destroy_vpollinfo_free(struct vpollinfo *vi) { knlist_destroy(&vi->vpi_selinfo.si_note); mtx_destroy(&vi->vpi_lock); uma_zfree(vnodepoll_zone, vi); } static void destroy_vpollinfo(struct vpollinfo *vi) { knlist_clear(&vi->vpi_selinfo.si_note, 1); seldrain(&vi->vpi_selinfo); destroy_vpollinfo_free(vi); } /* * Initialize per-vnode helper structure to hold poll-related state. */ void v_addpollinfo(struct vnode *vp) { struct vpollinfo *vi; if (vp->v_pollinfo != NULL) return; vi = uma_zalloc(vnodepoll_zone, M_WAITOK | M_ZERO); mtx_init(&vi->vpi_lock, "vnode pollinfo", NULL, MTX_DEF); knlist_init(&vi->vpi_selinfo.si_note, vp, vfs_knllock, vfs_knlunlock, vfs_knl_assert_locked, vfs_knl_assert_unlocked); VI_LOCK(vp); if (vp->v_pollinfo != NULL) { VI_UNLOCK(vp); destroy_vpollinfo_free(vi); return; } vp->v_pollinfo = vi; VI_UNLOCK(vp); } /* * Record a process's interest in events which might happen to * a vnode. Because poll uses the historic select-style interface * internally, this routine serves as both the ``check for any * pending events'' and the ``record my interest in future events'' * functions. (These are done together, while the lock is held, * to avoid race conditions.) */ int vn_pollrecord(struct vnode *vp, struct thread *td, int events) { v_addpollinfo(vp); mtx_lock(&vp->v_pollinfo->vpi_lock); if (vp->v_pollinfo->vpi_revents & events) { /* * This leaves events we are not interested * in available for the other process which * which presumably had requested them * (otherwise they would never have been * recorded). */ events &= vp->v_pollinfo->vpi_revents; vp->v_pollinfo->vpi_revents &= ~events; mtx_unlock(&vp->v_pollinfo->vpi_lock); return (events); } vp->v_pollinfo->vpi_events |= events; selrecord(td, &vp->v_pollinfo->vpi_selinfo); mtx_unlock(&vp->v_pollinfo->vpi_lock); return (0); } /* * Routine to create and manage a filesystem syncer vnode. */ #define sync_close ((int (*)(struct vop_close_args *))nullop) static int sync_fsync(struct vop_fsync_args *); static int sync_inactive(struct vop_inactive_args *); static int sync_reclaim(struct vop_reclaim_args *); static struct vop_vector sync_vnodeops = { .vop_bypass = VOP_EOPNOTSUPP, .vop_close = sync_close, /* close */ .vop_fsync = sync_fsync, /* fsync */ .vop_inactive = sync_inactive, /* inactive */ .vop_need_inactive = vop_stdneed_inactive, /* need_inactive */ .vop_reclaim = sync_reclaim, /* reclaim */ .vop_lock1 = vop_stdlock, /* lock */ .vop_unlock = vop_stdunlock, /* unlock */ .vop_islocked = vop_stdislocked, /* islocked */ }; VFS_VOP_VECTOR_REGISTER(sync_vnodeops); /* * Create a new filesystem syncer vnode for the specified mount point. */ void vfs_allocate_syncvnode(struct mount *mp) { struct vnode *vp; struct bufobj *bo; static long start, incr, next; int error; /* Allocate a new vnode */ error = getnewvnode("syncer", mp, &sync_vnodeops, &vp); if (error != 0) panic("vfs_allocate_syncvnode: getnewvnode() failed"); vp->v_type = VNON; vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); vp->v_vflag |= VV_FORCEINSMQ; error = insmntque(vp, mp); if (error != 0) panic("vfs_allocate_syncvnode: insmntque() failed"); vp->v_vflag &= ~VV_FORCEINSMQ; VOP_UNLOCK(vp); /* * Place the vnode onto the syncer worklist. We attempt to * scatter them about on the list so that they will go off * at evenly distributed times even if all the filesystems * are mounted at once. */ next += incr; if (next == 0 || next > syncer_maxdelay) { start /= 2; incr /= 2; if (start == 0) { start = syncer_maxdelay / 2; incr = syncer_maxdelay; } next = start; } bo = &vp->v_bufobj; BO_LOCK(bo); vn_syncer_add_to_worklist(bo, syncdelay > 0 ? next % syncdelay : 0); /* XXX - vn_syncer_add_to_worklist() also grabs and drops sync_mtx. */ mtx_lock(&sync_mtx); sync_vnode_count++; if (mp->mnt_syncer == NULL) { mp->mnt_syncer = vp; vp = NULL; } mtx_unlock(&sync_mtx); BO_UNLOCK(bo); if (vp != NULL) { vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); vgone(vp); vput(vp); } } void vfs_deallocate_syncvnode(struct mount *mp) { struct vnode *vp; mtx_lock(&sync_mtx); vp = mp->mnt_syncer; if (vp != NULL) mp->mnt_syncer = NULL; mtx_unlock(&sync_mtx); if (vp != NULL) vrele(vp); } /* * Do a lazy sync of the filesystem. */ static int sync_fsync(struct vop_fsync_args *ap) { struct vnode *syncvp = ap->a_vp; struct mount *mp = syncvp->v_mount; int error, save; struct bufobj *bo; /* * We only need to do something if this is a lazy evaluation. */ if (ap->a_waitfor != MNT_LAZY) return (0); /* * Move ourselves to the back of the sync list. */ bo = &syncvp->v_bufobj; BO_LOCK(bo); vn_syncer_add_to_worklist(bo, syncdelay); BO_UNLOCK(bo); /* * Walk the list of vnodes pushing all that are dirty and * not already on the sync list. */ if (vfs_busy(mp, MBF_NOWAIT) != 0) return (0); if (vn_start_write(NULL, &mp, V_NOWAIT) != 0) { vfs_unbusy(mp); return (0); } save = curthread_pflags_set(TDP_SYNCIO); /* * The filesystem at hand may be idle with free vnodes stored in the * batch. Return them instead of letting them stay there indefinitely. */ vfs_periodic(mp, MNT_NOWAIT); error = VFS_SYNC(mp, MNT_LAZY); curthread_pflags_restore(save); vn_finished_write(mp); vfs_unbusy(mp); return (error); } /* * The syncer vnode is no referenced. */ static int sync_inactive(struct vop_inactive_args *ap) { vgone(ap->a_vp); return (0); } /* * The syncer vnode is no longer needed and is being decommissioned. * * Modifications to the worklist must be protected by sync_mtx. */ static int sync_reclaim(struct vop_reclaim_args *ap) { struct vnode *vp = ap->a_vp; struct bufobj *bo; bo = &vp->v_bufobj; BO_LOCK(bo); mtx_lock(&sync_mtx); if (vp->v_mount->mnt_syncer == vp) vp->v_mount->mnt_syncer = NULL; if (bo->bo_flag & BO_ONWORKLST) { LIST_REMOVE(bo, bo_synclist); syncer_worklist_len--; sync_vnode_count--; bo->bo_flag &= ~BO_ONWORKLST; } mtx_unlock(&sync_mtx); BO_UNLOCK(bo); return (0); } int vn_need_pageq_flush(struct vnode *vp) { struct vm_object *obj; int need; MPASS(mtx_owned(VI_MTX(vp))); need = 0; if ((obj = vp->v_object) != NULL && (vp->v_vflag & VV_NOSYNC) == 0 && vm_object_mightbedirty(obj)) need = 1; return (need); } /* * Check if vnode represents a disk device */ int vn_isdisk(struct vnode *vp, int *errp) { int error; if (vp->v_type != VCHR) { error = ENOTBLK; goto out; } error = 0; dev_lock(); if (vp->v_rdev == NULL) error = ENXIO; else if (vp->v_rdev->si_devsw == NULL) error = ENXIO; else if (!(vp->v_rdev->si_devsw->d_flags & D_DISK)) error = ENOTBLK; dev_unlock(); out: if (errp != NULL) *errp = error; return (error == 0); } /* * VOP_FPLOOKUP_VEXEC routines are subject to special circumstances, see * the comment above cache_fplookup for details. * * We never deny as priv_check_cred calls are not yet supported, see vaccess. */ int vaccess_vexec_smr(mode_t file_mode, uid_t file_uid, gid_t file_gid, struct ucred *cred) { VFS_SMR_ASSERT_ENTERED(); /* Check the owner. */ if (cred->cr_uid == file_uid) { if (file_mode & S_IXUSR) return (0); return (EAGAIN); } /* Otherwise, check the groups (first match) */ if (groupmember(file_gid, cred)) { if (file_mode & S_IXGRP) return (0); return (EAGAIN); } /* Otherwise, check everyone else. */ if (file_mode & S_IXOTH) return (0); return (EAGAIN); } /* * Common filesystem object access control check routine. Accepts a * vnode's type, "mode", uid and gid, requested access mode, and credentials. * Returns 0 on success, or an errno on failure. */ int vaccess(enum vtype type, mode_t file_mode, uid_t file_uid, gid_t file_gid, accmode_t accmode, struct ucred *cred) { accmode_t dac_granted; accmode_t priv_granted; KASSERT((accmode & ~(VEXEC | VWRITE | VREAD | VADMIN | VAPPEND)) == 0, ("invalid bit in accmode")); KASSERT((accmode & VAPPEND) == 0 || (accmode & VWRITE), ("VAPPEND without VWRITE")); /* * Look for a normal, non-privileged way to access the file/directory * as requested. If it exists, go with that. */ dac_granted = 0; /* Check the owner. */ if (cred->cr_uid == file_uid) { dac_granted |= VADMIN; if (file_mode & S_IXUSR) dac_granted |= VEXEC; if (file_mode & S_IRUSR) dac_granted |= VREAD; if (file_mode & S_IWUSR) dac_granted |= (VWRITE | VAPPEND); if ((accmode & dac_granted) == accmode) return (0); goto privcheck; } /* Otherwise, check the groups (first match) */ if (groupmember(file_gid, cred)) { if (file_mode & S_IXGRP) dac_granted |= VEXEC; if (file_mode & S_IRGRP) dac_granted |= VREAD; if (file_mode & S_IWGRP) dac_granted |= (VWRITE | VAPPEND); if ((accmode & dac_granted) == accmode) return (0); goto privcheck; } /* Otherwise, check everyone else. */ if (file_mode & S_IXOTH) dac_granted |= VEXEC; if (file_mode & S_IROTH) dac_granted |= VREAD; if (file_mode & S_IWOTH) dac_granted |= (VWRITE | VAPPEND); if ((accmode & dac_granted) == accmode) return (0); privcheck: /* * Build a privilege mask to determine if the set of privileges * satisfies the requirements when combined with the granted mask * from above. For each privilege, if the privilege is required, * bitwise or the request type onto the priv_granted mask. */ priv_granted = 0; if (type == VDIR) { /* * For directories, use PRIV_VFS_LOOKUP to satisfy VEXEC * requests, instead of PRIV_VFS_EXEC. */ if ((accmode & VEXEC) && ((dac_granted & VEXEC) == 0) && !priv_check_cred(cred, PRIV_VFS_LOOKUP)) priv_granted |= VEXEC; } else { /* * Ensure that at least one execute bit is on. Otherwise, * a privileged user will always succeed, and we don't want * this to happen unless the file really is executable. */ if ((accmode & VEXEC) && ((dac_granted & VEXEC) == 0) && (file_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) != 0 && !priv_check_cred(cred, PRIV_VFS_EXEC)) priv_granted |= VEXEC; } if ((accmode & VREAD) && ((dac_granted & VREAD) == 0) && !priv_check_cred(cred, PRIV_VFS_READ)) priv_granted |= VREAD; if ((accmode & VWRITE) && ((dac_granted & VWRITE) == 0) && !priv_check_cred(cred, PRIV_VFS_WRITE)) priv_granted |= (VWRITE | VAPPEND); if ((accmode & VADMIN) && ((dac_granted & VADMIN) == 0) && !priv_check_cred(cred, PRIV_VFS_ADMIN)) priv_granted |= VADMIN; if ((accmode & (priv_granted | dac_granted)) == accmode) { return (0); } return ((accmode & VADMIN) ? EPERM : EACCES); } /* * Credential check based on process requesting service, and per-attribute * permissions. */ int extattr_check_cred(struct vnode *vp, int attrnamespace, struct ucred *cred, struct thread *td, accmode_t accmode) { /* * Kernel-invoked always succeeds. */ if (cred == NOCRED) return (0); /* * Do not allow privileged processes in jail to directly manipulate * system attributes. */ switch (attrnamespace) { case EXTATTR_NAMESPACE_SYSTEM: /* Potentially should be: return (EPERM); */ return (priv_check_cred(cred, PRIV_VFS_EXTATTR_SYSTEM)); case EXTATTR_NAMESPACE_USER: return (VOP_ACCESS(vp, accmode, cred, td)); default: return (EPERM); } } #ifdef DEBUG_VFS_LOCKS /* * This only exists to suppress warnings from unlocked specfs accesses. It is * no longer ok to have an unlocked VFS. */ #define IGNORE_LOCK(vp) (KERNEL_PANICKED() || (vp) == NULL || \ (vp)->v_type == VCHR || (vp)->v_type == VBAD) int vfs_badlock_ddb = 1; /* Drop into debugger on violation. */ SYSCTL_INT(_debug, OID_AUTO, vfs_badlock_ddb, CTLFLAG_RW, &vfs_badlock_ddb, 0, "Drop into debugger on lock violation"); int vfs_badlock_mutex = 1; /* Check for interlock across VOPs. */ SYSCTL_INT(_debug, OID_AUTO, vfs_badlock_mutex, CTLFLAG_RW, &vfs_badlock_mutex, 0, "Check for interlock across VOPs"); int vfs_badlock_print = 1; /* Print lock violations. */ SYSCTL_INT(_debug, OID_AUTO, vfs_badlock_print, CTLFLAG_RW, &vfs_badlock_print, 0, "Print lock violations"); int vfs_badlock_vnode = 1; /* Print vnode details on lock violations. */ SYSCTL_INT(_debug, OID_AUTO, vfs_badlock_vnode, CTLFLAG_RW, &vfs_badlock_vnode, 0, "Print vnode details on lock violations"); #ifdef KDB int vfs_badlock_backtrace = 1; /* Print backtrace at lock violations. */ SYSCTL_INT(_debug, OID_AUTO, vfs_badlock_backtrace, CTLFLAG_RW, &vfs_badlock_backtrace, 0, "Print backtrace at lock violations"); #endif static void vfs_badlock(const char *msg, const char *str, struct vnode *vp) { #ifdef KDB if (vfs_badlock_backtrace) kdb_backtrace(); #endif if (vfs_badlock_vnode) vn_printf(vp, "vnode "); if (vfs_badlock_print) printf("%s: %p %s\n", str, (void *)vp, msg); if (vfs_badlock_ddb) kdb_enter(KDB_WHY_VFSLOCK, "lock violation"); } void assert_vi_locked(struct vnode *vp, const char *str) { if (vfs_badlock_mutex && !mtx_owned(VI_MTX(vp))) vfs_badlock("interlock is not locked but should be", str, vp); } void assert_vi_unlocked(struct vnode *vp, const char *str) { if (vfs_badlock_mutex && mtx_owned(VI_MTX(vp))) vfs_badlock("interlock is locked but should not be", str, vp); } void assert_vop_locked(struct vnode *vp, const char *str) { int locked; if (!IGNORE_LOCK(vp)) { locked = VOP_ISLOCKED(vp); if (locked == 0 || locked == LK_EXCLOTHER) vfs_badlock("is not locked but should be", str, vp); } } void assert_vop_unlocked(struct vnode *vp, const char *str) { if (!IGNORE_LOCK(vp) && VOP_ISLOCKED(vp) == LK_EXCLUSIVE) vfs_badlock("is locked but should not be", str, vp); } void assert_vop_elocked(struct vnode *vp, const char *str) { if (!IGNORE_LOCK(vp) && VOP_ISLOCKED(vp) != LK_EXCLUSIVE) vfs_badlock("is not exclusive locked but should be", str, vp); } #endif /* DEBUG_VFS_LOCKS */ void vop_rename_fail(struct vop_rename_args *ap) { if (ap->a_tvp != NULL) vput(ap->a_tvp); if (ap->a_tdvp == ap->a_tvp) vrele(ap->a_tdvp); else vput(ap->a_tdvp); vrele(ap->a_fdvp); vrele(ap->a_fvp); } void vop_rename_pre(void *ap) { struct vop_rename_args *a = ap; #ifdef DEBUG_VFS_LOCKS if (a->a_tvp) ASSERT_VI_UNLOCKED(a->a_tvp, "VOP_RENAME"); ASSERT_VI_UNLOCKED(a->a_tdvp, "VOP_RENAME"); ASSERT_VI_UNLOCKED(a->a_fvp, "VOP_RENAME"); ASSERT_VI_UNLOCKED(a->a_fdvp, "VOP_RENAME"); /* Check the source (from). */ if (a->a_tdvp->v_vnlock != a->a_fdvp->v_vnlock && (a->a_tvp == NULL || a->a_tvp->v_vnlock != a->a_fdvp->v_vnlock)) ASSERT_VOP_UNLOCKED(a->a_fdvp, "vop_rename: fdvp locked"); if (a->a_tvp == NULL || a->a_tvp->v_vnlock != a->a_fvp->v_vnlock) ASSERT_VOP_UNLOCKED(a->a_fvp, "vop_rename: fvp locked"); /* Check the target. */ if (a->a_tvp) ASSERT_VOP_LOCKED(a->a_tvp, "vop_rename: tvp not locked"); ASSERT_VOP_LOCKED(a->a_tdvp, "vop_rename: tdvp not locked"); #endif /* * It may be tempting to add vn_seqc_write_begin/end calls here and * in vop_rename_post but that's not going to work out since some * filesystems relookup vnodes mid-rename. This is probably a bug. * * For now filesystems are expected to do the relevant calls after they * decide what vnodes to operate on. */ if (a->a_tdvp != a->a_fdvp) vhold(a->a_fdvp); if (a->a_tvp != a->a_fvp) vhold(a->a_fvp); vhold(a->a_tdvp); if (a->a_tvp) vhold(a->a_tvp); } #ifdef DEBUG_VFS_LOCKS void vop_fplookup_vexec_debugpre(void *ap __unused) { VFS_SMR_ASSERT_ENTERED(); } void vop_fplookup_vexec_debugpost(void *ap __unused, int rc __unused) { VFS_SMR_ASSERT_ENTERED(); } void vop_strategy_debugpre(void *ap) { struct vop_strategy_args *a; struct buf *bp; a = ap; bp = a->a_bp; /* * Cluster ops lock their component buffers but not the IO container. */ if ((bp->b_flags & B_CLUSTER) != 0) return; if (!KERNEL_PANICKED() && !BUF_ISLOCKED(bp)) { if (vfs_badlock_print) printf( "VOP_STRATEGY: bp is not locked but should be\n"); if (vfs_badlock_ddb) kdb_enter(KDB_WHY_VFSLOCK, "lock violation"); } } void vop_lock_debugpre(void *ap) { struct vop_lock1_args *a = ap; if ((a->a_flags & LK_INTERLOCK) == 0) ASSERT_VI_UNLOCKED(a->a_vp, "VOP_LOCK"); else ASSERT_VI_LOCKED(a->a_vp, "VOP_LOCK"); } void vop_lock_debugpost(void *ap, int rc) { struct vop_lock1_args *a = ap; ASSERT_VI_UNLOCKED(a->a_vp, "VOP_LOCK"); if (rc == 0 && (a->a_flags & LK_EXCLOTHER) == 0) ASSERT_VOP_LOCKED(a->a_vp, "VOP_LOCK"); } void vop_unlock_debugpre(void *ap) { struct vop_unlock_args *a = ap; ASSERT_VOP_LOCKED(a->a_vp, "VOP_UNLOCK"); } void vop_need_inactive_debugpre(void *ap) { struct vop_need_inactive_args *a = ap; ASSERT_VI_LOCKED(a->a_vp, "VOP_NEED_INACTIVE"); } void vop_need_inactive_debugpost(void *ap, int rc) { struct vop_need_inactive_args *a = ap; ASSERT_VI_LOCKED(a->a_vp, "VOP_NEED_INACTIVE"); } #endif void vop_create_pre(void *ap) { struct vop_create_args *a; struct vnode *dvp; a = ap; dvp = a->a_dvp; vn_seqc_write_begin(dvp); } void vop_create_post(void *ap, int rc) { struct vop_create_args *a; struct vnode *dvp; a = ap; dvp = a->a_dvp; vn_seqc_write_end(dvp); if (!rc) VFS_KNOTE_LOCKED(dvp, NOTE_WRITE); } void vop_whiteout_pre(void *ap) { struct vop_whiteout_args *a; struct vnode *dvp; a = ap; dvp = a->a_dvp; vn_seqc_write_begin(dvp); } void vop_whiteout_post(void *ap, int rc) { struct vop_whiteout_args *a; struct vnode *dvp; a = ap; dvp = a->a_dvp; vn_seqc_write_end(dvp); } void vop_deleteextattr_pre(void *ap) { struct vop_deleteextattr_args *a; struct vnode *vp; a = ap; vp = a->a_vp; vn_seqc_write_begin(vp); } void vop_deleteextattr_post(void *ap, int rc) { struct vop_deleteextattr_args *a; struct vnode *vp; a = ap; vp = a->a_vp; vn_seqc_write_end(vp); if (!rc) VFS_KNOTE_LOCKED(a->a_vp, NOTE_ATTRIB); } void vop_link_pre(void *ap) { struct vop_link_args *a; struct vnode *vp, *tdvp; a = ap; vp = a->a_vp; tdvp = a->a_tdvp; vn_seqc_write_begin(vp); vn_seqc_write_begin(tdvp); } void vop_link_post(void *ap, int rc) { struct vop_link_args *a; struct vnode *vp, *tdvp; a = ap; vp = a->a_vp; tdvp = a->a_tdvp; vn_seqc_write_end(vp); vn_seqc_write_end(tdvp); if (!rc) { VFS_KNOTE_LOCKED(vp, NOTE_LINK); VFS_KNOTE_LOCKED(tdvp, NOTE_WRITE); } } void vop_mkdir_pre(void *ap) { struct vop_mkdir_args *a; struct vnode *dvp; a = ap; dvp = a->a_dvp; vn_seqc_write_begin(dvp); } void vop_mkdir_post(void *ap, int rc) { struct vop_mkdir_args *a; struct vnode *dvp; a = ap; dvp = a->a_dvp; vn_seqc_write_end(dvp); if (!rc) VFS_KNOTE_LOCKED(dvp, NOTE_WRITE | NOTE_LINK); } void vop_mknod_pre(void *ap) { struct vop_mknod_args *a; struct vnode *dvp; a = ap; dvp = a->a_dvp; vn_seqc_write_begin(dvp); } void vop_mknod_post(void *ap, int rc) { struct vop_mknod_args *a; struct vnode *dvp; a = ap; dvp = a->a_dvp; vn_seqc_write_end(dvp); if (!rc) VFS_KNOTE_LOCKED(dvp, NOTE_WRITE); } void vop_reclaim_post(void *ap, int rc) { struct vop_reclaim_args *a; struct vnode *vp; a = ap; vp = a->a_vp; ASSERT_VOP_IN_SEQC(vp); if (!rc) VFS_KNOTE_LOCKED(vp, NOTE_REVOKE); } void vop_remove_pre(void *ap) { struct vop_remove_args *a; struct vnode *dvp, *vp; a = ap; dvp = a->a_dvp; vp = a->a_vp; vn_seqc_write_begin(dvp); vn_seqc_write_begin(vp); } void vop_remove_post(void *ap, int rc) { struct vop_remove_args *a; struct vnode *dvp, *vp; a = ap; dvp = a->a_dvp; vp = a->a_vp; vn_seqc_write_end(dvp); vn_seqc_write_end(vp); if (!rc) { VFS_KNOTE_LOCKED(dvp, NOTE_WRITE); VFS_KNOTE_LOCKED(vp, NOTE_DELETE); } } void vop_rename_post(void *ap, int rc) { struct vop_rename_args *a = ap; long hint; if (!rc) { hint = NOTE_WRITE; if (a->a_fdvp == a->a_tdvp) { if (a->a_tvp != NULL && a->a_tvp->v_type == VDIR) hint |= NOTE_LINK; VFS_KNOTE_UNLOCKED(a->a_fdvp, hint); VFS_KNOTE_UNLOCKED(a->a_tdvp, hint); } else { hint |= NOTE_EXTEND; if (a->a_fvp->v_type == VDIR) hint |= NOTE_LINK; VFS_KNOTE_UNLOCKED(a->a_fdvp, hint); if (a->a_fvp->v_type == VDIR && a->a_tvp != NULL && a->a_tvp->v_type == VDIR) hint &= ~NOTE_LINK; VFS_KNOTE_UNLOCKED(a->a_tdvp, hint); } VFS_KNOTE_UNLOCKED(a->a_fvp, NOTE_RENAME); if (a->a_tvp) VFS_KNOTE_UNLOCKED(a->a_tvp, NOTE_DELETE); } if (a->a_tdvp != a->a_fdvp) vdrop(a->a_fdvp); if (a->a_tvp != a->a_fvp) vdrop(a->a_fvp); vdrop(a->a_tdvp); if (a->a_tvp) vdrop(a->a_tvp); } void vop_rmdir_pre(void *ap) { struct vop_rmdir_args *a; struct vnode *dvp, *vp; a = ap; dvp = a->a_dvp; vp = a->a_vp; vn_seqc_write_begin(dvp); vn_seqc_write_begin(vp); } void vop_rmdir_post(void *ap, int rc) { struct vop_rmdir_args *a; struct vnode *dvp, *vp; a = ap; dvp = a->a_dvp; vp = a->a_vp; vn_seqc_write_end(dvp); vn_seqc_write_end(vp); if (!rc) { VFS_KNOTE_LOCKED(dvp, NOTE_WRITE | NOTE_LINK); VFS_KNOTE_LOCKED(vp, NOTE_DELETE); } } void vop_setattr_pre(void *ap) { struct vop_setattr_args *a; struct vnode *vp; a = ap; vp = a->a_vp; vn_seqc_write_begin(vp); } void vop_setattr_post(void *ap, int rc) { struct vop_setattr_args *a; struct vnode *vp; a = ap; vp = a->a_vp; vn_seqc_write_end(vp); if (!rc) VFS_KNOTE_LOCKED(vp, NOTE_ATTRIB); } void vop_setacl_pre(void *ap) { struct vop_setacl_args *a; struct vnode *vp; a = ap; vp = a->a_vp; vn_seqc_write_begin(vp); } void vop_setacl_post(void *ap, int rc __unused) { struct vop_setacl_args *a; struct vnode *vp; a = ap; vp = a->a_vp; vn_seqc_write_end(vp); } void vop_setextattr_pre(void *ap) { struct vop_setextattr_args *a; struct vnode *vp; a = ap; vp = a->a_vp; vn_seqc_write_begin(vp); } void vop_setextattr_post(void *ap, int rc) { struct vop_setextattr_args *a; struct vnode *vp; a = ap; vp = a->a_vp; vn_seqc_write_end(vp); if (!rc) VFS_KNOTE_LOCKED(vp, NOTE_ATTRIB); } void vop_symlink_pre(void *ap) { struct vop_symlink_args *a; struct vnode *dvp; a = ap; dvp = a->a_dvp; vn_seqc_write_begin(dvp); } void vop_symlink_post(void *ap, int rc) { struct vop_symlink_args *a; struct vnode *dvp; a = ap; dvp = a->a_dvp; vn_seqc_write_end(dvp); if (!rc) VFS_KNOTE_LOCKED(dvp, NOTE_WRITE); } void vop_open_post(void *ap, int rc) { struct vop_open_args *a = ap; if (!rc) VFS_KNOTE_LOCKED(a->a_vp, NOTE_OPEN); } void vop_close_post(void *ap, int rc) { struct vop_close_args *a = ap; if (!rc && (a->a_cred != NOCRED || /* filter out revokes */ !VN_IS_DOOMED(a->a_vp))) { VFS_KNOTE_LOCKED(a->a_vp, (a->a_fflag & FWRITE) != 0 ? NOTE_CLOSE_WRITE : NOTE_CLOSE); } } void vop_read_post(void *ap, int rc) { struct vop_read_args *a = ap; if (!rc) VFS_KNOTE_LOCKED(a->a_vp, NOTE_READ); } void vop_readdir_post(void *ap, int rc) { struct vop_readdir_args *a = ap; if (!rc) VFS_KNOTE_LOCKED(a->a_vp, NOTE_READ); } static struct knlist fs_knlist; static void vfs_event_init(void *arg) { knlist_init_mtx(&fs_knlist, NULL); } /* XXX - correct order? */ SYSINIT(vfs_knlist, SI_SUB_VFS, SI_ORDER_ANY, vfs_event_init, NULL); void vfs_event_signal(fsid_t *fsid, uint32_t event, intptr_t data __unused) { KNOTE_UNLOCKED(&fs_knlist, event); } static int filt_fsattach(struct knote *kn); static void filt_fsdetach(struct knote *kn); static int filt_fsevent(struct knote *kn, long hint); struct filterops fs_filtops = { .f_isfd = 0, .f_attach = filt_fsattach, .f_detach = filt_fsdetach, .f_event = filt_fsevent }; static int filt_fsattach(struct knote *kn) { kn->kn_flags |= EV_CLEAR; knlist_add(&fs_knlist, kn, 0); return (0); } static void filt_fsdetach(struct knote *kn) { knlist_remove(&fs_knlist, kn, 0); } static int filt_fsevent(struct knote *kn, long hint) { kn->kn_fflags |= hint; return (kn->kn_fflags != 0); } static int sysctl_vfs_ctl(SYSCTL_HANDLER_ARGS) { struct vfsidctl vc; int error; struct mount *mp; error = SYSCTL_IN(req, &vc, sizeof(vc)); if (error) return (error); if (vc.vc_vers != VFS_CTL_VERS1) return (EINVAL); mp = vfs_getvfs(&vc.vc_fsid); if (mp == NULL) return (ENOENT); /* ensure that a specific sysctl goes to the right filesystem. */ if (strcmp(vc.vc_fstypename, "*") != 0 && strcmp(vc.vc_fstypename, mp->mnt_vfc->vfc_name) != 0) { vfs_rel(mp); return (EINVAL); } VCTLTOREQ(&vc, req); error = VFS_SYSCTL(mp, vc.vc_op, req); vfs_rel(mp); return (error); } SYSCTL_PROC(_vfs, OID_AUTO, ctl, CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | CTLFLAG_WR, NULL, 0, sysctl_vfs_ctl, "", "Sysctl by fsid"); /* * Function to initialize a va_filerev field sensibly. * XXX: Wouldn't a random number make a lot more sense ?? */ u_quad_t init_va_filerev(void) { struct bintime bt; getbinuptime(&bt); return (((u_quad_t)bt.sec << 32LL) | (bt.frac >> 32LL)); } static int filt_vfsread(struct knote *kn, long hint); static int filt_vfswrite(struct knote *kn, long hint); static int filt_vfsvnode(struct knote *kn, long hint); static void filt_vfsdetach(struct knote *kn); static struct filterops vfsread_filtops = { .f_isfd = 1, .f_detach = filt_vfsdetach, .f_event = filt_vfsread }; static struct filterops vfswrite_filtops = { .f_isfd = 1, .f_detach = filt_vfsdetach, .f_event = filt_vfswrite }; static struct filterops vfsvnode_filtops = { .f_isfd = 1, .f_detach = filt_vfsdetach, .f_event = filt_vfsvnode }; static void vfs_knllock(void *arg) { struct vnode *vp = arg; vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); } static void vfs_knlunlock(void *arg) { struct vnode *vp = arg; VOP_UNLOCK(vp); } static void vfs_knl_assert_locked(void *arg) { #ifdef DEBUG_VFS_LOCKS struct vnode *vp = arg; ASSERT_VOP_LOCKED(vp, "vfs_knl_assert_locked"); #endif } static void vfs_knl_assert_unlocked(void *arg) { #ifdef DEBUG_VFS_LOCKS struct vnode *vp = arg; ASSERT_VOP_UNLOCKED(vp, "vfs_knl_assert_unlocked"); #endif } int vfs_kqfilter(struct vop_kqfilter_args *ap) { struct vnode *vp = ap->a_vp; struct knote *kn = ap->a_kn; struct knlist *knl; switch (kn->kn_filter) { case EVFILT_READ: kn->kn_fop = &vfsread_filtops; break; case EVFILT_WRITE: kn->kn_fop = &vfswrite_filtops; break; case EVFILT_VNODE: kn->kn_fop = &vfsvnode_filtops; break; default: return (EINVAL); } kn->kn_hook = (caddr_t)vp; v_addpollinfo(vp); if (vp->v_pollinfo == NULL) return (ENOMEM); knl = &vp->v_pollinfo->vpi_selinfo.si_note; vhold(vp); knlist_add(knl, kn, 0); return (0); } /* * Detach knote from vnode */ static void filt_vfsdetach(struct knote *kn) { struct vnode *vp = (struct vnode *)kn->kn_hook; KASSERT(vp->v_pollinfo != NULL, ("Missing v_pollinfo")); knlist_remove(&vp->v_pollinfo->vpi_selinfo.si_note, kn, 0); vdrop(vp); } /*ARGSUSED*/ static int filt_vfsread(struct knote *kn, long hint) { struct vnode *vp = (struct vnode *)kn->kn_hook; struct vattr va; int res; /* * filesystem is gone, so set the EOF flag and schedule * the knote for deletion. */ if (hint == NOTE_REVOKE || (hint == 0 && vp->v_type == VBAD)) { VI_LOCK(vp); kn->kn_flags |= (EV_EOF | EV_ONESHOT); VI_UNLOCK(vp); return (1); } if (VOP_GETATTR(vp, &va, curthread->td_ucred)) return (0); VI_LOCK(vp); kn->kn_data = va.va_size - kn->kn_fp->f_offset; res = (kn->kn_sfflags & NOTE_FILE_POLL) != 0 || kn->kn_data != 0; VI_UNLOCK(vp); return (res); } /*ARGSUSED*/ static int filt_vfswrite(struct knote *kn, long hint) { struct vnode *vp = (struct vnode *)kn->kn_hook; VI_LOCK(vp); /* * filesystem is gone, so set the EOF flag and schedule * the knote for deletion. */ if (hint == NOTE_REVOKE || (hint == 0 && vp->v_type == VBAD)) kn->kn_flags |= (EV_EOF | EV_ONESHOT); kn->kn_data = 0; VI_UNLOCK(vp); return (1); } static int filt_vfsvnode(struct knote *kn, long hint) { struct vnode *vp = (struct vnode *)kn->kn_hook; int res; VI_LOCK(vp); if (kn->kn_sfflags & hint) kn->kn_fflags |= hint; if (hint == NOTE_REVOKE || (hint == 0 && vp->v_type == VBAD)) { kn->kn_flags |= EV_EOF; VI_UNLOCK(vp); return (1); } res = (kn->kn_fflags != 0); VI_UNLOCK(vp); return (res); } /* * Returns whether the directory is empty or not. * If it is empty, the return value is 0; otherwise * the return value is an error value (which may * be ENOTEMPTY). */ int vfs_emptydir(struct vnode *vp) { struct uio uio; struct iovec iov; struct dirent *dirent, *dp, *endp; int error, eof; error = 0; eof = 0; ASSERT_VOP_LOCKED(vp, "vfs_emptydir"); dirent = malloc(sizeof(struct dirent), M_TEMP, M_WAITOK); iov.iov_base = dirent; iov.iov_len = sizeof(struct dirent); uio.uio_iov = &iov; uio.uio_iovcnt = 1; uio.uio_offset = 0; uio.uio_resid = sizeof(struct dirent); uio.uio_segflg = UIO_SYSSPACE; uio.uio_rw = UIO_READ; uio.uio_td = curthread; while (eof == 0 && error == 0) { error = VOP_READDIR(vp, &uio, curthread->td_ucred, &eof, NULL, NULL); if (error != 0) break; endp = (void *)((uint8_t *)dirent + sizeof(struct dirent) - uio.uio_resid); for (dp = dirent; dp < endp; dp = (void *)((uint8_t *)dp + GENERIC_DIRSIZ(dp))) { if (dp->d_type == DT_WHT) continue; if (dp->d_namlen == 0) continue; if (dp->d_type != DT_DIR && dp->d_type != DT_UNKNOWN) { error = ENOTEMPTY; break; } if (dp->d_namlen > 2) { error = ENOTEMPTY; break; } if (dp->d_namlen == 1 && dp->d_name[0] != '.') { error = ENOTEMPTY; break; } if (dp->d_namlen == 2 && dp->d_name[1] != '.') { error = ENOTEMPTY; break; } uio.uio_resid = sizeof(struct dirent); } } free(dirent, M_TEMP); return (error); } int vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off) { int error; if (dp->d_reclen > ap->a_uio->uio_resid) return (ENAMETOOLONG); error = uiomove(dp, dp->d_reclen, ap->a_uio); if (error) { if (ap->a_ncookies != NULL) { if (ap->a_cookies != NULL) free(ap->a_cookies, M_TEMP); ap->a_cookies = NULL; *ap->a_ncookies = 0; } return (error); } if (ap->a_ncookies == NULL) return (0); KASSERT(ap->a_cookies, ("NULL ap->a_cookies value with non-NULL ap->a_ncookies!")); *ap->a_cookies = realloc(*ap->a_cookies, (*ap->a_ncookies + 1) * sizeof(u_long), M_TEMP, M_WAITOK | M_ZERO); (*ap->a_cookies)[*ap->a_ncookies] = off; *ap->a_ncookies += 1; return (0); } /* * The purpose of this routine is to remove granularity from accmode_t, * reducing it into standard unix access bits - VEXEC, VREAD, VWRITE, * VADMIN and VAPPEND. * * If it returns 0, the caller is supposed to continue with the usual * access checks using 'accmode' as modified by this routine. If it * returns nonzero value, the caller is supposed to return that value * as errno. * * Note that after this routine runs, accmode may be zero. */ int vfs_unixify_accmode(accmode_t *accmode) { /* * There is no way to specify explicit "deny" rule using * file mode or POSIX.1e ACLs. */ if (*accmode & VEXPLICIT_DENY) { *accmode = 0; return (0); } /* * None of these can be translated into usual access bits. * Also, the common case for NFSv4 ACLs is to not contain * either of these bits. Caller should check for VWRITE * on the containing directory instead. */ if (*accmode & (VDELETE_CHILD | VDELETE)) return (EPERM); if (*accmode & VADMIN_PERMS) { *accmode &= ~VADMIN_PERMS; *accmode |= VADMIN; } /* * There is no way to deny VREAD_ATTRIBUTES, VREAD_ACL * or VSYNCHRONIZE using file mode or POSIX.1e ACL. */ *accmode &= ~(VSTAT_PERMS | VSYNCHRONIZE); return (0); } /* * Clear out a doomed vnode (if any) and replace it with a new one as long * as the fs is not being unmounted. Return the root vnode to the caller. */ static int __noinline vfs_cache_root_fallback(struct mount *mp, int flags, struct vnode **vpp) { struct vnode *vp; int error; restart: if (mp->mnt_rootvnode != NULL) { MNT_ILOCK(mp); vp = mp->mnt_rootvnode; if (vp != NULL) { if (!VN_IS_DOOMED(vp)) { vrefact(vp); MNT_IUNLOCK(mp); error = vn_lock(vp, flags); if (error == 0) { *vpp = vp; return (0); } vrele(vp); goto restart; } /* * Clear the old one. */ mp->mnt_rootvnode = NULL; } MNT_IUNLOCK(mp); if (vp != NULL) { vfs_op_barrier_wait(mp); vrele(vp); } } error = VFS_CACHEDROOT(mp, flags, vpp); if (error != 0) return (error); if (mp->mnt_vfs_ops == 0) { MNT_ILOCK(mp); if (mp->mnt_vfs_ops != 0) { MNT_IUNLOCK(mp); return (0); } if (mp->mnt_rootvnode == NULL) { vrefact(*vpp); mp->mnt_rootvnode = *vpp; } else { if (mp->mnt_rootvnode != *vpp) { if (!VN_IS_DOOMED(mp->mnt_rootvnode)) { panic("%s: mismatch between vnode returned " " by VFS_CACHEDROOT and the one cached " " (%p != %p)", __func__, *vpp, mp->mnt_rootvnode); } } } MNT_IUNLOCK(mp); } return (0); } int vfs_cache_root(struct mount *mp, int flags, struct vnode **vpp) { struct vnode *vp; int error; if (!vfs_op_thread_enter(mp)) return (vfs_cache_root_fallback(mp, flags, vpp)); vp = atomic_load_ptr(&mp->mnt_rootvnode); if (vp == NULL || VN_IS_DOOMED(vp)) { vfs_op_thread_exit(mp); return (vfs_cache_root_fallback(mp, flags, vpp)); } vrefact(vp); vfs_op_thread_exit(mp); error = vn_lock(vp, flags); if (error != 0) { vrele(vp); return (vfs_cache_root_fallback(mp, flags, vpp)); } *vpp = vp; return (0); } struct vnode * vfs_cache_root_clear(struct mount *mp) { struct vnode *vp; /* * ops > 0 guarantees there is nobody who can see this vnode */ MPASS(mp->mnt_vfs_ops > 0); vp = mp->mnt_rootvnode; if (vp != NULL) vn_seqc_write_begin(vp); mp->mnt_rootvnode = NULL; return (vp); } void vfs_cache_root_set(struct mount *mp, struct vnode *vp) { MPASS(mp->mnt_vfs_ops > 0); vrefact(vp); mp->mnt_rootvnode = vp; } /* * These are helper functions for filesystems to traverse all * their vnodes. See MNT_VNODE_FOREACH_ALL() in sys/mount.h. * * This interface replaces MNT_VNODE_FOREACH. */ struct vnode * __mnt_vnode_next_all(struct vnode **mvp, struct mount *mp) { struct vnode *vp; if (should_yield()) kern_yield(PRI_USER); MNT_ILOCK(mp); KASSERT((*mvp)->v_mount == mp, ("marker vnode mount list mismatch")); for (vp = TAILQ_NEXT(*mvp, v_nmntvnodes); vp != NULL; vp = TAILQ_NEXT(vp, v_nmntvnodes)) { /* Allow a racy peek at VIRF_DOOMED to save a lock acquisition. */ if (vp->v_type == VMARKER || VN_IS_DOOMED(vp)) continue; VI_LOCK(vp); if (VN_IS_DOOMED(vp)) { VI_UNLOCK(vp); continue; } break; } if (vp == NULL) { __mnt_vnode_markerfree_all(mvp, mp); /* MNT_IUNLOCK(mp); -- done in above function */ mtx_assert(MNT_MTX(mp), MA_NOTOWNED); return (NULL); } TAILQ_REMOVE(&mp->mnt_nvnodelist, *mvp, v_nmntvnodes); TAILQ_INSERT_AFTER(&mp->mnt_nvnodelist, vp, *mvp, v_nmntvnodes); MNT_IUNLOCK(mp); return (vp); } struct vnode * __mnt_vnode_first_all(struct vnode **mvp, struct mount *mp) { struct vnode *vp; *mvp = vn_alloc_marker(mp); MNT_ILOCK(mp); MNT_REF(mp); TAILQ_FOREACH(vp, &mp->mnt_nvnodelist, v_nmntvnodes) { /* Allow a racy peek at VIRF_DOOMED to save a lock acquisition. */ if (vp->v_type == VMARKER || VN_IS_DOOMED(vp)) continue; VI_LOCK(vp); if (VN_IS_DOOMED(vp)) { VI_UNLOCK(vp); continue; } break; } if (vp == NULL) { MNT_REL(mp); MNT_IUNLOCK(mp); vn_free_marker(*mvp); *mvp = NULL; return (NULL); } TAILQ_INSERT_AFTER(&mp->mnt_nvnodelist, vp, *mvp, v_nmntvnodes); MNT_IUNLOCK(mp); return (vp); } void __mnt_vnode_markerfree_all(struct vnode **mvp, struct mount *mp) { if (*mvp == NULL) { MNT_IUNLOCK(mp); return; } mtx_assert(MNT_MTX(mp), MA_OWNED); KASSERT((*mvp)->v_mount == mp, ("marker vnode mount list mismatch")); TAILQ_REMOVE(&mp->mnt_nvnodelist, *mvp, v_nmntvnodes); MNT_REL(mp); MNT_IUNLOCK(mp); vn_free_marker(*mvp); *mvp = NULL; } /* * These are helper functions for filesystems to traverse their * lazy vnodes. See MNT_VNODE_FOREACH_LAZY() in sys/mount.h */ static void mnt_vnode_markerfree_lazy(struct vnode **mvp, struct mount *mp) { KASSERT((*mvp)->v_mount == mp, ("marker vnode mount list mismatch")); MNT_ILOCK(mp); MNT_REL(mp); MNT_IUNLOCK(mp); vn_free_marker(*mvp); *mvp = NULL; } /* * Relock the mp mount vnode list lock with the vp vnode interlock in the * conventional lock order during mnt_vnode_next_lazy iteration. * * On entry, the mount vnode list lock is held and the vnode interlock is not. * The list lock is dropped and reacquired. On success, both locks are held. * On failure, the mount vnode list lock is held but the vnode interlock is * not, and the procedure may have yielded. */ static bool mnt_vnode_next_lazy_relock(struct vnode *mvp, struct mount *mp, struct vnode *vp) { VNASSERT(mvp->v_mount == mp && mvp->v_type == VMARKER && TAILQ_NEXT(mvp, v_lazylist) != NULL, mvp, ("%s: bad marker", __func__)); VNASSERT(vp->v_mount == mp && vp->v_type != VMARKER, vp, ("%s: inappropriate vnode", __func__)); ASSERT_VI_UNLOCKED(vp, __func__); mtx_assert(&mp->mnt_listmtx, MA_OWNED); TAILQ_REMOVE(&mp->mnt_lazyvnodelist, mvp, v_lazylist); TAILQ_INSERT_BEFORE(vp, mvp, v_lazylist); /* * Note we may be racing against vdrop which transitioned the hold * count to 0 and now waits for the ->mnt_listmtx lock. This is fine, * if we are the only user after we get the interlock we will just * vdrop. */ vhold(vp); mtx_unlock(&mp->mnt_listmtx); VI_LOCK(vp); if (VN_IS_DOOMED(vp)) { VNPASS((vp->v_mflag & VMP_LAZYLIST) == 0, vp); goto out_lost; } VNPASS(vp->v_mflag & VMP_LAZYLIST, vp); /* * There is nothing to do if we are the last user. */ if (!refcount_release_if_not_last(&vp->v_holdcnt)) goto out_lost; mtx_lock(&mp->mnt_listmtx); return (true); out_lost: vdropl(vp); maybe_yield(); mtx_lock(&mp->mnt_listmtx); return (false); } static struct vnode * mnt_vnode_next_lazy(struct vnode **mvp, struct mount *mp, mnt_lazy_cb_t *cb, void *cbarg) { struct vnode *vp; mtx_assert(&mp->mnt_listmtx, MA_OWNED); KASSERT((*mvp)->v_mount == mp, ("marker vnode mount list mismatch")); restart: vp = TAILQ_NEXT(*mvp, v_lazylist); while (vp != NULL) { if (vp->v_type == VMARKER) { vp = TAILQ_NEXT(vp, v_lazylist); continue; } /* * See if we want to process the vnode. Note we may encounter a * long string of vnodes we don't care about and hog the list * as a result. Check for it and requeue the marker. */ VNPASS(!VN_IS_DOOMED(vp), vp); if (!cb(vp, cbarg)) { if (!should_yield()) { vp = TAILQ_NEXT(vp, v_lazylist); continue; } TAILQ_REMOVE(&mp->mnt_lazyvnodelist, *mvp, v_lazylist); TAILQ_INSERT_AFTER(&mp->mnt_lazyvnodelist, vp, *mvp, v_lazylist); mtx_unlock(&mp->mnt_listmtx); kern_yield(PRI_USER); mtx_lock(&mp->mnt_listmtx); goto restart; } /* * Try-lock because this is the wrong lock order. */ if (!VI_TRYLOCK(vp) && !mnt_vnode_next_lazy_relock(*mvp, mp, vp)) goto restart; KASSERT(vp->v_type != VMARKER, ("locked marker %p", vp)); KASSERT(vp->v_mount == mp || vp->v_mount == NULL, ("alien vnode on the lazy list %p %p", vp, mp)); VNPASS(vp->v_mount == mp, vp); VNPASS(!VN_IS_DOOMED(vp), vp); break; } TAILQ_REMOVE(&mp->mnt_lazyvnodelist, *mvp, v_lazylist); /* Check if we are done */ if (vp == NULL) { mtx_unlock(&mp->mnt_listmtx); mnt_vnode_markerfree_lazy(mvp, mp); return (NULL); } TAILQ_INSERT_AFTER(&mp->mnt_lazyvnodelist, vp, *mvp, v_lazylist); mtx_unlock(&mp->mnt_listmtx); ASSERT_VI_LOCKED(vp, "lazy iter"); return (vp); } struct vnode * __mnt_vnode_next_lazy(struct vnode **mvp, struct mount *mp, mnt_lazy_cb_t *cb, void *cbarg) { if (should_yield()) kern_yield(PRI_USER); mtx_lock(&mp->mnt_listmtx); return (mnt_vnode_next_lazy(mvp, mp, cb, cbarg)); } struct vnode * __mnt_vnode_first_lazy(struct vnode **mvp, struct mount *mp, mnt_lazy_cb_t *cb, void *cbarg) { struct vnode *vp; if (TAILQ_EMPTY(&mp->mnt_lazyvnodelist)) return (NULL); *mvp = vn_alloc_marker(mp); MNT_ILOCK(mp); MNT_REF(mp); MNT_IUNLOCK(mp); mtx_lock(&mp->mnt_listmtx); vp = TAILQ_FIRST(&mp->mnt_lazyvnodelist); if (vp == NULL) { mtx_unlock(&mp->mnt_listmtx); mnt_vnode_markerfree_lazy(mvp, mp); return (NULL); } TAILQ_INSERT_BEFORE(vp, *mvp, v_lazylist); return (mnt_vnode_next_lazy(mvp, mp, cb, cbarg)); } void __mnt_vnode_markerfree_lazy(struct vnode **mvp, struct mount *mp) { if (*mvp == NULL) return; mtx_lock(&mp->mnt_listmtx); TAILQ_REMOVE(&mp->mnt_lazyvnodelist, *mvp, v_lazylist); mtx_unlock(&mp->mnt_listmtx); mnt_vnode_markerfree_lazy(mvp, mp); } int vn_dir_check_exec(struct vnode *vp, struct componentname *cnp) { if ((cnp->cn_flags & NOEXECCHECK) != 0) { cnp->cn_flags &= ~NOEXECCHECK; return (0); } return (VOP_ACCESS(vp, VEXEC, cnp->cn_cred, cnp->cn_thread)); } /* * Do not use this variant unless you have means other than the hold count * to prevent the vnode from getting freed. */ void vn_seqc_write_begin_unheld_locked(struct vnode *vp) { ASSERT_VI_LOCKED(vp, __func__); VNPASS(vp->v_seqc_users >= 0, vp); vp->v_seqc_users++; if (vp->v_seqc_users == 1) seqc_sleepable_write_begin(&vp->v_seqc); } void vn_seqc_write_begin_locked(struct vnode *vp) { ASSERT_VI_LOCKED(vp, __func__); VNPASS(vp->v_holdcnt > 0, vp); vn_seqc_write_begin_unheld_locked(vp); } void vn_seqc_write_begin(struct vnode *vp) { VI_LOCK(vp); vn_seqc_write_begin_locked(vp); VI_UNLOCK(vp); } void vn_seqc_write_begin_unheld(struct vnode *vp) { VI_LOCK(vp); vn_seqc_write_begin_unheld_locked(vp); VI_UNLOCK(vp); } void vn_seqc_write_end_locked(struct vnode *vp) { ASSERT_VI_LOCKED(vp, __func__); VNPASS(vp->v_seqc_users > 0, vp); vp->v_seqc_users--; if (vp->v_seqc_users == 0) seqc_sleepable_write_end(&vp->v_seqc); } void vn_seqc_write_end(struct vnode *vp) { VI_LOCK(vp); vn_seqc_write_end_locked(vp); VI_UNLOCK(vp); } diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c index 9e9c53d3327c..69a6be798208 100644 --- a/sys/kern/vfs_syscalls.c +++ b/sys/kern/vfs_syscalls.c @@ -1,4915 +1,4915 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, 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. * 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. * * @(#)vfs_syscalls.c 8.13 (Berkeley) 4/15/94 */ #include __FBSDID("$FreeBSD$"); #include "opt_capsicum.h" #include "opt_ktrace.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef KTRACE #include #endif #include #include #include #include #include #include #include #include MALLOC_DEFINE(M_FADVISE, "fadvise", "posix_fadvise(2) information"); SDT_PROVIDER_DEFINE(vfs); SDT_PROBE_DEFINE2(vfs, , stat, mode, "char *", "int"); SDT_PROBE_DEFINE2(vfs, , stat, reg, "char *", "int"); static int kern_chflagsat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, u_long flags, int atflag); static int setfflags(struct thread *td, struct vnode *, u_long); static int getutimes(const struct timeval *, enum uio_seg, struct timespec *); static int getutimens(const struct timespec *, enum uio_seg, struct timespec *, int *); static int setutimes(struct thread *td, struct vnode *, const struct timespec *, int, int); static int vn_access(struct vnode *vp, int user_flags, struct ucred *cred, struct thread *td); static int kern_fhlinkat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, fhandle_t *fhp); static int kern_getfhat(struct thread *td, int flags, int fd, const char *path, enum uio_seg pathseg, fhandle_t *fhp); static int kern_readlink_vp(struct vnode *vp, char *buf, enum uio_seg bufseg, size_t count, struct thread *td); static int kern_linkat_vp(struct thread *td, struct vnode *vp, int fd, const char *path, enum uio_seg segflag); int kern_sync(struct thread *td) { struct mount *mp, *nmp; int save; mtx_lock(&mountlist_mtx); for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { if (vfs_busy(mp, MBF_NOWAIT | MBF_MNTLSTLOCK)) { nmp = TAILQ_NEXT(mp, mnt_list); continue; } if ((mp->mnt_flag & MNT_RDONLY) == 0 && vn_start_write(NULL, &mp, V_NOWAIT) == 0) { save = curthread_pflags_set(TDP_SYNCIO); vfs_periodic(mp, MNT_NOWAIT); VFS_SYNC(mp, MNT_NOWAIT); curthread_pflags_restore(save); vn_finished_write(mp); } mtx_lock(&mountlist_mtx); nmp = TAILQ_NEXT(mp, mnt_list); vfs_unbusy(mp); } mtx_unlock(&mountlist_mtx); return (0); } /* * Sync each mounted filesystem. */ #ifndef _SYS_SYSPROTO_H_ struct sync_args { int dummy; }; #endif /* ARGSUSED */ int sys_sync(struct thread *td, struct sync_args *uap) { return (kern_sync(td)); } /* * Change filesystem quotas. */ #ifndef _SYS_SYSPROTO_H_ struct quotactl_args { char *path; int cmd; int uid; caddr_t arg; }; #endif int sys_quotactl(struct thread *td, struct quotactl_args *uap) { struct mount *mp; struct nameidata nd; int error; AUDIT_ARG_CMD(uap->cmd); AUDIT_ARG_UID(uap->uid); if (!prison_allow(td->td_ucred, PR_ALLOW_QUOTAS)) return (EPERM); NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNODE1, UIO_USERSPACE, uap->path, td); if ((error = namei(&nd)) != 0) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); mp = nd.ni_vp->v_mount; vfs_ref(mp); vput(nd.ni_vp); error = vfs_busy(mp, 0); if (error != 0) { vfs_rel(mp); return (error); } error = VFS_QUOTACTL(mp, uap->cmd, uap->uid, uap->arg); /* * Since quota on operation typically needs to open quota * file, the Q_QUOTAON handler needs to unbusy the mount point * before calling into namei. Otherwise, unmount might be * started between two vfs_busy() invocations (first is our, * second is from mount point cross-walk code in lookup()), * causing deadlock. * * Require that Q_QUOTAON handles the vfs_busy() reference on * its own, always returning with ubusied mount point. */ if ((uap->cmd >> SUBCMDSHIFT) != Q_QUOTAON && (uap->cmd >> SUBCMDSHIFT) != Q_QUOTAOFF) vfs_unbusy(mp); vfs_rel(mp); return (error); } /* * Used by statfs conversion routines to scale the block size up if * necessary so that all of the block counts are <= 'max_size'. Note * that 'max_size' should be a bitmask, i.e. 2^n - 1 for some non-zero * value of 'n'. */ void statfs_scale_blocks(struct statfs *sf, long max_size) { uint64_t count; int shift; KASSERT(powerof2(max_size + 1), ("%s: invalid max_size", __func__)); /* * Attempt to scale the block counts to give a more accurate * overview to userland of the ratio of free space to used * space. To do this, find the largest block count and compute * a divisor that lets it fit into a signed integer <= max_size. */ if (sf->f_bavail < 0) count = -sf->f_bavail; else count = sf->f_bavail; count = MAX(sf->f_blocks, MAX(sf->f_bfree, count)); if (count <= max_size) return; count >>= flsl(max_size); shift = 0; while (count > 0) { shift++; count >>=1; } sf->f_bsize <<= shift; sf->f_blocks >>= shift; sf->f_bfree >>= shift; sf->f_bavail >>= shift; } static int kern_do_statfs(struct thread *td, struct mount *mp, struct statfs *buf) { int error; if (mp == NULL) return (EBADF); error = vfs_busy(mp, 0); vfs_rel(mp); if (error != 0) return (error); #ifdef MAC error = mac_mount_check_stat(td->td_ucred, mp); if (error != 0) goto out; #endif error = VFS_STATFS(mp, buf); if (error != 0) goto out; if (priv_check_cred_vfs_generation(td->td_ucred)) { buf->f_fsid.val[0] = buf->f_fsid.val[1] = 0; prison_enforce_statfs(td->td_ucred, mp, buf); } out: vfs_unbusy(mp); return (error); } /* * Get filesystem statistics. */ #ifndef _SYS_SYSPROTO_H_ struct statfs_args { char *path; struct statfs *buf; }; #endif int sys_statfs(struct thread *td, struct statfs_args *uap) { struct statfs *sfp; int error; sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_statfs(td, uap->path, UIO_USERSPACE, sfp); if (error == 0) error = copyout(sfp, uap->buf, sizeof(struct statfs)); free(sfp, M_STATFS); return (error); } int kern_statfs(struct thread *td, const char *path, enum uio_seg pathseg, struct statfs *buf) { struct mount *mp; struct nameidata nd; int error; NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1, pathseg, path, td); error = namei(&nd); if (error != 0) return (error); mp = nd.ni_vp->v_mount; vfs_ref(mp); NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_vp); return (kern_do_statfs(td, mp, buf)); } /* * Get filesystem statistics. */ #ifndef _SYS_SYSPROTO_H_ struct fstatfs_args { int fd; struct statfs *buf; }; #endif int sys_fstatfs(struct thread *td, struct fstatfs_args *uap) { struct statfs *sfp; int error; sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_fstatfs(td, uap->fd, sfp); if (error == 0) error = copyout(sfp, uap->buf, sizeof(struct statfs)); free(sfp, M_STATFS); return (error); } int kern_fstatfs(struct thread *td, int fd, struct statfs *buf) { struct file *fp; struct mount *mp; struct vnode *vp; int error; AUDIT_ARG_FD(fd); error = getvnode(td, fd, &cap_fstatfs_rights, &fp); if (error != 0) return (error); vp = fp->f_vnode; vn_lock(vp, LK_SHARED | LK_RETRY); #ifdef AUDIT AUDIT_ARG_VNODE1(vp); #endif mp = vp->v_mount; if (mp != NULL) vfs_ref(mp); VOP_UNLOCK(vp); fdrop(fp, td); return (kern_do_statfs(td, mp, buf)); } /* * Get statistics on all filesystems. */ #ifndef _SYS_SYSPROTO_H_ struct getfsstat_args { struct statfs *buf; long bufsize; int mode; }; #endif int sys_getfsstat(struct thread *td, struct getfsstat_args *uap) { size_t count; int error; if (uap->bufsize < 0 || uap->bufsize > SIZE_MAX) return (EINVAL); error = kern_getfsstat(td, &uap->buf, uap->bufsize, &count, UIO_USERSPACE, uap->mode); if (error == 0) td->td_retval[0] = count; return (error); } /* * If (bufsize > 0 && bufseg == UIO_SYSSPACE) * The caller is responsible for freeing memory which will be allocated * in '*buf'. */ int kern_getfsstat(struct thread *td, struct statfs **buf, size_t bufsize, size_t *countp, enum uio_seg bufseg, int mode) { struct mount *mp, *nmp; struct statfs *sfsp, *sp, *sptmp, *tofree; size_t count, maxcount; int error; switch (mode) { case MNT_WAIT: case MNT_NOWAIT: break; default: if (bufseg == UIO_SYSSPACE) *buf = NULL; return (EINVAL); } restart: maxcount = bufsize / sizeof(struct statfs); if (bufsize == 0) { sfsp = NULL; tofree = NULL; } else if (bufseg == UIO_USERSPACE) { sfsp = *buf; tofree = NULL; } else /* if (bufseg == UIO_SYSSPACE) */ { count = 0; mtx_lock(&mountlist_mtx); TAILQ_FOREACH(mp, &mountlist, mnt_list) { count++; } mtx_unlock(&mountlist_mtx); if (maxcount > count) maxcount = count; tofree = sfsp = *buf = malloc(maxcount * sizeof(struct statfs), M_STATFS, M_WAITOK); } count = 0; /* * If there is no target buffer they only want the count. * * This could be TAILQ_FOREACH but it is open-coded to match the original * code below. */ if (sfsp == NULL) { mtx_lock(&mountlist_mtx); for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { if (prison_canseemount(td->td_ucred, mp) != 0) { nmp = TAILQ_NEXT(mp, mnt_list); continue; } #ifdef MAC if (mac_mount_check_stat(td->td_ucred, mp) != 0) { nmp = TAILQ_NEXT(mp, mnt_list); continue; } #endif count++; nmp = TAILQ_NEXT(mp, mnt_list); } mtx_unlock(&mountlist_mtx); *countp = count; return (0); } /* * They want the entire thing. * * Short-circuit the corner case of no room for anything, avoids * relocking below. */ if (maxcount < 1) { goto out; } mtx_lock(&mountlist_mtx); for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { if (prison_canseemount(td->td_ucred, mp) != 0) { nmp = TAILQ_NEXT(mp, mnt_list); continue; } #ifdef MAC if (mac_mount_check_stat(td->td_ucred, mp) != 0) { nmp = TAILQ_NEXT(mp, mnt_list); continue; } #endif if (mode == MNT_WAIT) { if (vfs_busy(mp, MBF_MNTLSTLOCK) != 0) { /* * If vfs_busy() failed, and MBF_NOWAIT * wasn't passed, then the mp is gone. * Furthermore, because of MBF_MNTLSTLOCK, * the mountlist_mtx was dropped. We have * no other choice than to start over. */ mtx_unlock(&mountlist_mtx); free(tofree, M_STATFS); goto restart; } } else { if (vfs_busy(mp, MBF_NOWAIT | MBF_MNTLSTLOCK) != 0) { nmp = TAILQ_NEXT(mp, mnt_list); continue; } } sp = &mp->mnt_stat; /* * If MNT_NOWAIT is specified, do not refresh * the fsstat cache. */ if (mode != MNT_NOWAIT) { error = VFS_STATFS(mp, sp); if (error != 0) { mtx_lock(&mountlist_mtx); nmp = TAILQ_NEXT(mp, mnt_list); vfs_unbusy(mp); continue; } } if (priv_check_cred_vfs_generation(td->td_ucred)) { sptmp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); *sptmp = *sp; sptmp->f_fsid.val[0] = sptmp->f_fsid.val[1] = 0; prison_enforce_statfs(td->td_ucred, mp, sptmp); sp = sptmp; } else sptmp = NULL; if (bufseg == UIO_SYSSPACE) { bcopy(sp, sfsp, sizeof(*sp)); free(sptmp, M_STATFS); } else /* if (bufseg == UIO_USERSPACE) */ { error = copyout(sp, sfsp, sizeof(*sp)); free(sptmp, M_STATFS); if (error != 0) { vfs_unbusy(mp); return (error); } } sfsp++; count++; if (count == maxcount) { vfs_unbusy(mp); goto out; } mtx_lock(&mountlist_mtx); nmp = TAILQ_NEXT(mp, mnt_list); vfs_unbusy(mp); } mtx_unlock(&mountlist_mtx); out: *countp = count; return (0); } #ifdef COMPAT_FREEBSD4 /* * Get old format filesystem statistics. */ static void freebsd4_cvtstatfs(struct statfs *, struct ostatfs *); #ifndef _SYS_SYSPROTO_H_ struct freebsd4_statfs_args { char *path; struct ostatfs *buf; }; #endif int freebsd4_statfs(struct thread *td, struct freebsd4_statfs_args *uap) { struct ostatfs osb; struct statfs *sfp; int error; sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_statfs(td, uap->path, UIO_USERSPACE, sfp); if (error == 0) { freebsd4_cvtstatfs(sfp, &osb); error = copyout(&osb, uap->buf, sizeof(osb)); } free(sfp, M_STATFS); return (error); } /* * Get filesystem statistics. */ #ifndef _SYS_SYSPROTO_H_ struct freebsd4_fstatfs_args { int fd; struct ostatfs *buf; }; #endif int freebsd4_fstatfs(struct thread *td, struct freebsd4_fstatfs_args *uap) { struct ostatfs osb; struct statfs *sfp; int error; sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_fstatfs(td, uap->fd, sfp); if (error == 0) { freebsd4_cvtstatfs(sfp, &osb); error = copyout(&osb, uap->buf, sizeof(osb)); } free(sfp, M_STATFS); return (error); } /* * Get statistics on all filesystems. */ #ifndef _SYS_SYSPROTO_H_ struct freebsd4_getfsstat_args { struct ostatfs *buf; long bufsize; int mode; }; #endif int freebsd4_getfsstat(struct thread *td, struct freebsd4_getfsstat_args *uap) { struct statfs *buf, *sp; struct ostatfs osb; size_t count, size; int error; if (uap->bufsize < 0) return (EINVAL); count = uap->bufsize / sizeof(struct ostatfs); if (count > SIZE_MAX / sizeof(struct statfs)) return (EINVAL); size = count * sizeof(struct statfs); error = kern_getfsstat(td, &buf, size, &count, UIO_SYSSPACE, uap->mode); if (error == 0) td->td_retval[0] = count; if (size != 0) { sp = buf; while (count != 0 && error == 0) { freebsd4_cvtstatfs(sp, &osb); error = copyout(&osb, uap->buf, sizeof(osb)); sp++; uap->buf++; count--; } free(buf, M_STATFS); } return (error); } /* * Implement fstatfs() for (NFS) file handles. */ #ifndef _SYS_SYSPROTO_H_ struct freebsd4_fhstatfs_args { struct fhandle *u_fhp; struct ostatfs *buf; }; #endif int freebsd4_fhstatfs(struct thread *td, struct freebsd4_fhstatfs_args *uap) { struct ostatfs osb; struct statfs *sfp; fhandle_t fh; int error; error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t)); if (error != 0) return (error); sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_fhstatfs(td, fh, sfp); if (error == 0) { freebsd4_cvtstatfs(sfp, &osb); error = copyout(&osb, uap->buf, sizeof(osb)); } free(sfp, M_STATFS); return (error); } /* * Convert a new format statfs structure to an old format statfs structure. */ static void freebsd4_cvtstatfs(struct statfs *nsp, struct ostatfs *osp) { statfs_scale_blocks(nsp, LONG_MAX); bzero(osp, sizeof(*osp)); osp->f_bsize = nsp->f_bsize; osp->f_iosize = MIN(nsp->f_iosize, LONG_MAX); osp->f_blocks = nsp->f_blocks; osp->f_bfree = nsp->f_bfree; osp->f_bavail = nsp->f_bavail; osp->f_files = MIN(nsp->f_files, LONG_MAX); osp->f_ffree = MIN(nsp->f_ffree, LONG_MAX); osp->f_owner = nsp->f_owner; osp->f_type = nsp->f_type; osp->f_flags = nsp->f_flags; osp->f_syncwrites = MIN(nsp->f_syncwrites, LONG_MAX); osp->f_asyncwrites = MIN(nsp->f_asyncwrites, LONG_MAX); osp->f_syncreads = MIN(nsp->f_syncreads, LONG_MAX); osp->f_asyncreads = MIN(nsp->f_asyncreads, LONG_MAX); strlcpy(osp->f_fstypename, nsp->f_fstypename, MIN(MFSNAMELEN, OMFSNAMELEN)); strlcpy(osp->f_mntonname, nsp->f_mntonname, MIN(MNAMELEN, OMNAMELEN)); strlcpy(osp->f_mntfromname, nsp->f_mntfromname, MIN(MNAMELEN, OMNAMELEN)); osp->f_fsid = nsp->f_fsid; } #endif /* COMPAT_FREEBSD4 */ #if defined(COMPAT_FREEBSD11) /* * Get old format filesystem statistics. */ static void freebsd11_cvtstatfs(struct statfs *, struct freebsd11_statfs *); int freebsd11_statfs(struct thread *td, struct freebsd11_statfs_args *uap) { struct freebsd11_statfs osb; struct statfs *sfp; int error; sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_statfs(td, uap->path, UIO_USERSPACE, sfp); if (error == 0) { freebsd11_cvtstatfs(sfp, &osb); error = copyout(&osb, uap->buf, sizeof(osb)); } free(sfp, M_STATFS); return (error); } /* * Get filesystem statistics. */ int freebsd11_fstatfs(struct thread *td, struct freebsd11_fstatfs_args *uap) { struct freebsd11_statfs osb; struct statfs *sfp; int error; sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_fstatfs(td, uap->fd, sfp); if (error == 0) { freebsd11_cvtstatfs(sfp, &osb); error = copyout(&osb, uap->buf, sizeof(osb)); } free(sfp, M_STATFS); return (error); } /* * Get statistics on all filesystems. */ int freebsd11_getfsstat(struct thread *td, struct freebsd11_getfsstat_args *uap) { struct freebsd11_statfs osb; struct statfs *buf, *sp; size_t count, size; int error; count = uap->bufsize / sizeof(struct ostatfs); size = count * sizeof(struct statfs); error = kern_getfsstat(td, &buf, size, &count, UIO_SYSSPACE, uap->mode); if (error == 0) td->td_retval[0] = count; if (size > 0) { sp = buf; while (count > 0 && error == 0) { freebsd11_cvtstatfs(sp, &osb); error = copyout(&osb, uap->buf, sizeof(osb)); sp++; uap->buf++; count--; } free(buf, M_STATFS); } return (error); } /* * Implement fstatfs() for (NFS) file handles. */ int freebsd11_fhstatfs(struct thread *td, struct freebsd11_fhstatfs_args *uap) { struct freebsd11_statfs osb; struct statfs *sfp; fhandle_t fh; int error; error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t)); if (error) return (error); sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_fhstatfs(td, fh, sfp); if (error == 0) { freebsd11_cvtstatfs(sfp, &osb); error = copyout(&osb, uap->buf, sizeof(osb)); } free(sfp, M_STATFS); return (error); } /* * Convert a new format statfs structure to an old format statfs structure. */ static void freebsd11_cvtstatfs(struct statfs *nsp, struct freebsd11_statfs *osp) { bzero(osp, sizeof(*osp)); osp->f_version = FREEBSD11_STATFS_VERSION; osp->f_type = nsp->f_type; osp->f_flags = nsp->f_flags; osp->f_bsize = nsp->f_bsize; osp->f_iosize = nsp->f_iosize; osp->f_blocks = nsp->f_blocks; osp->f_bfree = nsp->f_bfree; osp->f_bavail = nsp->f_bavail; osp->f_files = nsp->f_files; osp->f_ffree = nsp->f_ffree; osp->f_syncwrites = nsp->f_syncwrites; osp->f_asyncwrites = nsp->f_asyncwrites; osp->f_syncreads = nsp->f_syncreads; osp->f_asyncreads = nsp->f_asyncreads; osp->f_namemax = nsp->f_namemax; osp->f_owner = nsp->f_owner; osp->f_fsid = nsp->f_fsid; strlcpy(osp->f_fstypename, nsp->f_fstypename, MIN(MFSNAMELEN, sizeof(osp->f_fstypename))); strlcpy(osp->f_mntonname, nsp->f_mntonname, MIN(MNAMELEN, sizeof(osp->f_mntonname))); strlcpy(osp->f_mntfromname, nsp->f_mntfromname, MIN(MNAMELEN, sizeof(osp->f_mntfromname))); } #endif /* COMPAT_FREEBSD11 */ /* * Change current working directory to a given file descriptor. */ #ifndef _SYS_SYSPROTO_H_ struct fchdir_args { int fd; }; #endif int sys_fchdir(struct thread *td, struct fchdir_args *uap) { struct vnode *vp, *tdp; struct mount *mp; struct file *fp; int error; AUDIT_ARG_FD(uap->fd); error = getvnode(td, uap->fd, &cap_fchdir_rights, &fp); if (error != 0) return (error); vp = fp->f_vnode; vrefact(vp); fdrop(fp, td); vn_lock(vp, LK_SHARED | LK_RETRY); AUDIT_ARG_VNODE1(vp); error = change_dir(vp, td); while (!error && (mp = vp->v_mountedhere) != NULL) { if (vfs_busy(mp, 0)) continue; error = VFS_ROOT(mp, LK_SHARED, &tdp); vfs_unbusy(mp); if (error != 0) break; vput(vp); vp = tdp; } if (error != 0) { vput(vp); return (error); } VOP_UNLOCK(vp); pwd_chdir(td, vp); return (0); } /* * Change current working directory (``.''). */ #ifndef _SYS_SYSPROTO_H_ struct chdir_args { char *path; }; #endif int sys_chdir(struct thread *td, struct chdir_args *uap) { return (kern_chdir(td, uap->path, UIO_USERSPACE)); } int kern_chdir(struct thread *td, const char *path, enum uio_seg pathseg) { struct nameidata nd; int error; NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1, pathseg, path, td); if ((error = namei(&nd)) != 0) return (error); if ((error = change_dir(nd.ni_vp, td)) != 0) { vput(nd.ni_vp); NDFREE(&nd, NDF_ONLY_PNBUF); return (error); } VOP_UNLOCK(nd.ni_vp); NDFREE(&nd, NDF_ONLY_PNBUF); pwd_chdir(td, nd.ni_vp); return (0); } /* * Change notion of root (``/'') directory. */ #ifndef _SYS_SYSPROTO_H_ struct chroot_args { char *path; }; #endif int sys_chroot(struct thread *td, struct chroot_args *uap) { struct nameidata nd; int error; error = priv_check(td, PRIV_VFS_CHROOT); if (error != 0) return (error); NDINIT(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1, UIO_USERSPACE, uap->path, td); error = namei(&nd); if (error != 0) goto error; error = change_dir(nd.ni_vp, td); if (error != 0) goto e_vunlock; #ifdef MAC error = mac_vnode_check_chroot(td->td_ucred, nd.ni_vp); if (error != 0) goto e_vunlock; #endif VOP_UNLOCK(nd.ni_vp); error = pwd_chroot(td, nd.ni_vp); vrele(nd.ni_vp); NDFREE(&nd, NDF_ONLY_PNBUF); return (error); e_vunlock: vput(nd.ni_vp); error: NDFREE(&nd, NDF_ONLY_PNBUF); return (error); } /* * Common routine for chroot and chdir. Callers must provide a locked vnode * instance. */ int change_dir(struct vnode *vp, struct thread *td) { #ifdef MAC int error; #endif ASSERT_VOP_LOCKED(vp, "change_dir(): vp not locked"); if (vp->v_type != VDIR) return (ENOTDIR); #ifdef MAC error = mac_vnode_check_chdir(td->td_ucred, vp); if (error != 0) return (error); #endif return (VOP_ACCESS(vp, VEXEC, td->td_ucred, td)); } static __inline void flags_to_rights(int flags, cap_rights_t *rightsp) { if (flags & O_EXEC) { cap_rights_set_one(rightsp, CAP_FEXECVE); } else { switch ((flags & O_ACCMODE)) { case O_RDONLY: cap_rights_set_one(rightsp, CAP_READ); break; case O_RDWR: cap_rights_set_one(rightsp, CAP_READ); /* FALLTHROUGH */ case O_WRONLY: cap_rights_set_one(rightsp, CAP_WRITE); if (!(flags & (O_APPEND | O_TRUNC))) cap_rights_set_one(rightsp, CAP_SEEK); break; } } if (flags & O_CREAT) cap_rights_set_one(rightsp, CAP_CREATE); if (flags & O_TRUNC) cap_rights_set_one(rightsp, CAP_FTRUNCATE); if (flags & (O_SYNC | O_FSYNC)) cap_rights_set_one(rightsp, CAP_FSYNC); if (flags & (O_EXLOCK | O_SHLOCK)) cap_rights_set_one(rightsp, CAP_FLOCK); } /* * Check permissions, allocate an open file structure, and call the device * open routine if any. */ #ifndef _SYS_SYSPROTO_H_ struct open_args { char *path; int flags; int mode; }; #endif int sys_open(struct thread *td, struct open_args *uap) { return (kern_openat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->flags, uap->mode)); } #ifndef _SYS_SYSPROTO_H_ struct openat_args { int fd; char *path; int flag; int mode; }; #endif int sys_openat(struct thread *td, struct openat_args *uap) { AUDIT_ARG_FD(uap->fd); return (kern_openat(td, uap->fd, uap->path, UIO_USERSPACE, uap->flag, uap->mode)); } int kern_openat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, int flags, int mode) { struct proc *p = td->td_proc; struct filedesc *fdp = p->p_fd; struct file *fp; struct vnode *vp; struct nameidata nd; cap_rights_t rights; int cmode, error, indx; indx = -1; AUDIT_ARG_FFLAGS(flags); AUDIT_ARG_MODE(mode); cap_rights_init_one(&rights, CAP_LOOKUP); flags_to_rights(flags, &rights); /* * Only one of the O_EXEC, O_RDONLY, O_WRONLY and O_RDWR flags * may be specified. */ if (flags & O_EXEC) { if (flags & O_ACCMODE) return (EINVAL); } else if ((flags & O_ACCMODE) == O_ACCMODE) { return (EINVAL); } else { flags = FFLAGS(flags); } /* * Allocate a file structure. The descriptor to reference it * is allocated and set by finstall() below. */ error = falloc_noinstall(td, &fp); if (error != 0) return (error); /* * An extra reference on `fp' has been held for us by * falloc_noinstall(). */ /* Set the flags early so the finit in devfs can pick them up. */ fp->f_flag = flags & FMASK; cmode = ((mode & ~fdp->fd_cmask) & ALLPERMS) & ~S_ISTXT; NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | AUDITVNODE1, pathseg, path, fd, &rights, td); td->td_dupfd = -1; /* XXX check for fdopen */ error = vn_open(&nd, &flags, cmode, fp); if (error != 0) { /* * If the vn_open replaced the method vector, something * wonderous happened deep below and we just pass it up * pretending we know what we do. */ if (error == ENXIO && fp->f_ops != &badfileops) goto success; /* * Handle special fdopen() case. bleh. * * Don't do this for relative (capability) lookups; we don't * understand exactly what would happen, and we don't think * that it ever should. */ if ((nd.ni_lcf & NI_LCF_STRICTRELATIVE) == 0 && (error == ENODEV || error == ENXIO) && td->td_dupfd >= 0) { error = dupfdopen(td, fdp, td->td_dupfd, flags, error, &indx); if (error == 0) goto success; } goto bad; } td->td_dupfd = 0; NDFREE(&nd, NDF_ONLY_PNBUF); vp = nd.ni_vp; /* * Store the vnode, for any f_type. Typically, the vnode use * count is decremented by direct call to vn_closefile() for * files that switched type in the cdevsw fdopen() method. */ fp->f_vnode = vp; /* * If the file wasn't claimed by devfs bind it to the normal * vnode operations here. */ if (fp->f_ops == &badfileops) { KASSERT(vp->v_type != VFIFO, ("Unexpected fifo.")); fp->f_seqcount[UIO_READ] = 1; fp->f_seqcount[UIO_WRITE] = 1; finit(fp, (flags & FMASK) | (fp->f_flag & FHASLOCK), DTYPE_VNODE, vp, &vnops); } VOP_UNLOCK(vp); if (flags & O_TRUNC) { error = fo_truncate(fp, 0, td->td_ucred, td); if (error != 0) goto bad; } success: /* * If we haven't already installed the FD (for dupfdopen), do so now. */ if (indx == -1) { struct filecaps *fcaps; #ifdef CAPABILITIES if ((nd.ni_lcf & NI_LCF_STRICTRELATIVE) != 0) fcaps = &nd.ni_filecaps; else #endif fcaps = NULL; error = finstall(td, fp, &indx, flags, fcaps); /* On success finstall() consumes fcaps. */ if (error != 0) { filecaps_free(&nd.ni_filecaps); goto bad; } } else { filecaps_free(&nd.ni_filecaps); } /* * Release our private reference, leaving the one associated with * the descriptor table intact. */ fdrop(fp, td); td->td_retval[0] = indx; return (0); bad: KASSERT(indx == -1, ("indx=%d, should be -1", indx)); fdrop(fp, td); return (error); } #ifdef COMPAT_43 /* * Create a file. */ #ifndef _SYS_SYSPROTO_H_ struct ocreat_args { char *path; int mode; }; #endif int ocreat(struct thread *td, struct ocreat_args *uap) { return (kern_openat(td, AT_FDCWD, uap->path, UIO_USERSPACE, O_WRONLY | O_CREAT | O_TRUNC, uap->mode)); } #endif /* COMPAT_43 */ /* * Create a special file. */ #ifndef _SYS_SYSPROTO_H_ struct mknodat_args { int fd; char *path; mode_t mode; dev_t dev; }; #endif int sys_mknodat(struct thread *td, struct mknodat_args *uap) { return (kern_mknodat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode, uap->dev)); } #if defined(COMPAT_FREEBSD11) int freebsd11_mknod(struct thread *td, struct freebsd11_mknod_args *uap) { return (kern_mknodat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->mode, uap->dev)); } int freebsd11_mknodat(struct thread *td, struct freebsd11_mknodat_args *uap) { return (kern_mknodat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode, uap->dev)); } #endif /* COMPAT_FREEBSD11 */ int kern_mknodat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, int mode, dev_t dev) { struct vnode *vp; struct mount *mp; struct vattr vattr; struct nameidata nd; int error, whiteout = 0; AUDIT_ARG_MODE(mode); AUDIT_ARG_DEV(dev); switch (mode & S_IFMT) { case S_IFCHR: case S_IFBLK: error = priv_check(td, PRIV_VFS_MKNOD_DEV); if (error == 0 && dev == VNOVAL) error = EINVAL; break; case S_IFWHT: error = priv_check(td, PRIV_VFS_MKNOD_WHT); break; case S_IFIFO: if (dev == 0) return (kern_mkfifoat(td, fd, path, pathseg, mode)); /* FALLTHROUGH */ default: error = EINVAL; break; } if (error != 0) return (error); restart: bwillwrite(); NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 | NOCACHE, pathseg, path, fd, &cap_mknodat_rights, td); if ((error = namei(&nd)) != 0) return (error); vp = nd.ni_vp; if (vp != NULL) { NDFREE(&nd, NDF_ONLY_PNBUF); if (vp == nd.ni_dvp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); vrele(vp); return (EEXIST); } else { VATTR_NULL(&vattr); vattr.va_mode = (mode & ALLPERMS) & ~td->td_proc->p_fd->fd_cmask; vattr.va_rdev = dev; whiteout = 0; switch (mode & S_IFMT) { case S_IFCHR: vattr.va_type = VCHR; break; case S_IFBLK: vattr.va_type = VBLK; break; case S_IFWHT: whiteout = 1; break; default: panic("kern_mknod: invalid mode"); } } if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) return (error); goto restart; } #ifdef MAC if (error == 0 && !whiteout) error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd, &vattr); #endif if (error == 0) { if (whiteout) error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, CREATE); else { error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); if (error == 0) vput(nd.ni_vp); } } NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); vn_finished_write(mp); return (error); } /* * Create a named pipe. */ #ifndef _SYS_SYSPROTO_H_ struct mkfifo_args { char *path; int mode; }; #endif int sys_mkfifo(struct thread *td, struct mkfifo_args *uap) { return (kern_mkfifoat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->mode)); } #ifndef _SYS_SYSPROTO_H_ struct mkfifoat_args { int fd; char *path; mode_t mode; }; #endif int sys_mkfifoat(struct thread *td, struct mkfifoat_args *uap) { return (kern_mkfifoat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode)); } int kern_mkfifoat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, int mode) { struct mount *mp; struct vattr vattr; struct nameidata nd; int error; AUDIT_ARG_MODE(mode); restart: bwillwrite(); NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 | NOCACHE, pathseg, path, fd, &cap_mkfifoat_rights, td); if ((error = namei(&nd)) != 0) return (error); if (nd.ni_vp != NULL) { NDFREE(&nd, NDF_ONLY_PNBUF); if (nd.ni_vp == nd.ni_dvp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); vrele(nd.ni_vp); return (EEXIST); } if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) return (error); goto restart; } VATTR_NULL(&vattr); vattr.va_type = VFIFO; vattr.va_mode = (mode & ALLPERMS) & ~td->td_proc->p_fd->fd_cmask; #ifdef MAC error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd, &vattr); if (error != 0) goto out; #endif error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); if (error == 0) vput(nd.ni_vp); #ifdef MAC out: #endif vput(nd.ni_dvp); vn_finished_write(mp); NDFREE(&nd, NDF_ONLY_PNBUF); return (error); } /* * Make a hard file link. */ #ifndef _SYS_SYSPROTO_H_ struct link_args { char *path; char *link; }; #endif int sys_link(struct thread *td, struct link_args *uap) { return (kern_linkat(td, AT_FDCWD, AT_FDCWD, uap->path, uap->link, UIO_USERSPACE, FOLLOW)); } #ifndef _SYS_SYSPROTO_H_ struct linkat_args { int fd1; char *path1; int fd2; char *path2; int flag; }; #endif int sys_linkat(struct thread *td, struct linkat_args *uap) { int flag; flag = uap->flag; if ((flag & ~(AT_SYMLINK_FOLLOW | AT_BENEATH)) != 0) return (EINVAL); return (kern_linkat(td, uap->fd1, uap->fd2, uap->path1, uap->path2, UIO_USERSPACE, ((flag & AT_SYMLINK_FOLLOW) != 0 ? FOLLOW : NOFOLLOW) | ((flag & AT_BENEATH) != 0 ? BENEATH : 0))); } int hardlink_check_uid = 0; SYSCTL_INT(_security_bsd, OID_AUTO, hardlink_check_uid, CTLFLAG_RW, &hardlink_check_uid, 0, "Unprivileged processes cannot create hard links to files owned by other " "users"); static int hardlink_check_gid = 0; SYSCTL_INT(_security_bsd, OID_AUTO, hardlink_check_gid, CTLFLAG_RW, &hardlink_check_gid, 0, "Unprivileged processes cannot create hard links to files owned by other " "groups"); static int can_hardlink(struct vnode *vp, struct ucred *cred) { struct vattr va; int error; if (!hardlink_check_uid && !hardlink_check_gid) return (0); error = VOP_GETATTR(vp, &va, cred); if (error != 0) return (error); if (hardlink_check_uid && cred->cr_uid != va.va_uid) { error = priv_check_cred(cred, PRIV_VFS_LINK); if (error != 0) return (error); } if (hardlink_check_gid && !groupmember(va.va_gid, cred)) { error = priv_check_cred(cred, PRIV_VFS_LINK); if (error != 0) return (error); } return (0); } int kern_linkat(struct thread *td, int fd1, int fd2, const char *path1, const char *path2, enum uio_seg segflag, int follow) { struct nameidata nd; int error; do { bwillwrite(); NDINIT_ATRIGHTS(&nd, LOOKUP, follow | AUDITVNODE1, segflag, path1, fd1, &cap_linkat_source_rights, td); if ((error = namei(&nd)) != 0) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); error = kern_linkat_vp(td, nd.ni_vp, fd2, path2, segflag); } while (error == EAGAIN); return (error); } static int kern_linkat_vp(struct thread *td, struct vnode *vp, int fd, const char *path, enum uio_seg segflag) { struct nameidata nd; struct mount *mp; int error; if (vp->v_type == VDIR) { vrele(vp); return (EPERM); /* POSIX */ } NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE2 | NOCACHE, segflag, path, fd, &cap_linkat_target_rights, td); if ((error = namei(&nd)) == 0) { if (nd.ni_vp != NULL) { NDFREE(&nd, NDF_ONLY_PNBUF); if (nd.ni_dvp == nd.ni_vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); vrele(nd.ni_vp); vrele(vp); return (EEXIST); } else if (nd.ni_dvp->v_mount != vp->v_mount) { /* * Cross-device link. No need to recheck * vp->v_type, since it cannot change, except * to VBAD. */ NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); vrele(vp); return (EXDEV); } else if ((error = vn_lock(vp, LK_EXCLUSIVE)) == 0) { error = can_hardlink(vp, td->td_ucred); #ifdef MAC if (error == 0) error = mac_vnode_check_link(td->td_ucred, nd.ni_dvp, vp, &nd.ni_cnd); #endif if (error != 0) { vput(vp); vput(nd.ni_dvp); NDFREE(&nd, NDF_ONLY_PNBUF); return (error); } error = vn_start_write(vp, &mp, V_NOWAIT); if (error != 0) { vput(vp); vput(nd.ni_dvp); NDFREE(&nd, NDF_ONLY_PNBUF); error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH); if (error != 0) return (error); return (EAGAIN); } error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); VOP_UNLOCK(vp); vput(nd.ni_dvp); vn_finished_write(mp); NDFREE(&nd, NDF_ONLY_PNBUF); } else { vput(nd.ni_dvp); NDFREE(&nd, NDF_ONLY_PNBUF); vrele(vp); return (EAGAIN); } } vrele(vp); return (error); } /* * Make a symbolic link. */ #ifndef _SYS_SYSPROTO_H_ struct symlink_args { char *path; char *link; }; #endif int sys_symlink(struct thread *td, struct symlink_args *uap) { return (kern_symlinkat(td, uap->path, AT_FDCWD, uap->link, UIO_USERSPACE)); } #ifndef _SYS_SYSPROTO_H_ struct symlinkat_args { char *path; int fd; char *path2; }; #endif int sys_symlinkat(struct thread *td, struct symlinkat_args *uap) { return (kern_symlinkat(td, uap->path1, uap->fd, uap->path2, UIO_USERSPACE)); } int kern_symlinkat(struct thread *td, const char *path1, int fd, const char *path2, enum uio_seg segflg) { struct mount *mp; struct vattr vattr; const char *syspath; char *tmppath; struct nameidata nd; int error; if (segflg == UIO_SYSSPACE) { syspath = path1; } else { tmppath = uma_zalloc(namei_zone, M_WAITOK); if ((error = copyinstr(path1, tmppath, MAXPATHLEN, NULL)) != 0) goto out; syspath = tmppath; } AUDIT_ARG_TEXT(syspath); restart: bwillwrite(); NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 | NOCACHE, segflg, path2, fd, &cap_symlinkat_rights, td); if ((error = namei(&nd)) != 0) goto out; if (nd.ni_vp) { NDFREE(&nd, NDF_ONLY_PNBUF); if (nd.ni_vp == nd.ni_dvp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); vrele(nd.ni_vp); error = EEXIST; goto out; } if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) goto out; goto restart; } VATTR_NULL(&vattr); vattr.va_mode = ACCESSPERMS &~ td->td_proc->p_fd->fd_cmask; #ifdef MAC vattr.va_type = VLNK; error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd, &vattr); if (error != 0) goto out2; #endif error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr, syspath); if (error == 0) vput(nd.ni_vp); #ifdef MAC out2: #endif NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); vn_finished_write(mp); out: if (segflg != UIO_SYSSPACE) uma_zfree(namei_zone, tmppath); return (error); } /* * Delete a whiteout from the filesystem. */ #ifndef _SYS_SYSPROTO_H_ struct undelete_args { char *path; }; #endif int sys_undelete(struct thread *td, struct undelete_args *uap) { struct mount *mp; struct nameidata nd; int error; restart: bwillwrite(); NDINIT(&nd, DELETE, LOCKPARENT | DOWHITEOUT | AUDITVNODE1, UIO_USERSPACE, uap->path, td); error = namei(&nd); if (error != 0) return (error); if (nd.ni_vp != NULLVP || !(nd.ni_cnd.cn_flags & ISWHITEOUT)) { NDFREE(&nd, NDF_ONLY_PNBUF); if (nd.ni_vp == nd.ni_dvp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); if (nd.ni_vp) vrele(nd.ni_vp); return (EEXIST); } if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) return (error); goto restart; } error = VOP_WHITEOUT(nd.ni_dvp, &nd.ni_cnd, DELETE); NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); vn_finished_write(mp); return (error); } /* * Delete a name from the filesystem. */ #ifndef _SYS_SYSPROTO_H_ struct unlink_args { char *path; }; #endif int sys_unlink(struct thread *td, struct unlink_args *uap) { return (kern_funlinkat(td, AT_FDCWD, uap->path, FD_NONE, UIO_USERSPACE, 0, 0)); } static int kern_funlinkat_ex(struct thread *td, int dfd, const char *path, int fd, int flag, enum uio_seg pathseg, ino_t oldinum) { if ((flag & ~AT_REMOVEDIR) != 0) return (EINVAL); if ((flag & AT_REMOVEDIR) != 0) return (kern_frmdirat(td, dfd, path, fd, UIO_USERSPACE, 0)); return (kern_funlinkat(td, dfd, path, fd, UIO_USERSPACE, 0, 0)); } #ifndef _SYS_SYSPROTO_H_ struct unlinkat_args { int fd; char *path; int flag; }; #endif int sys_unlinkat(struct thread *td, struct unlinkat_args *uap) { return (kern_funlinkat_ex(td, uap->fd, uap->path, FD_NONE, uap->flag, UIO_USERSPACE, 0)); } #ifndef _SYS_SYSPROTO_H_ struct funlinkat_args { int dfd; const char *path; int fd; int flag; }; #endif int sys_funlinkat(struct thread *td, struct funlinkat_args *uap) { return (kern_funlinkat_ex(td, uap->dfd, uap->path, uap->fd, uap->flag, UIO_USERSPACE, 0)); } int kern_funlinkat(struct thread *td, int dfd, const char *path, int fd, enum uio_seg pathseg, int flag, ino_t oldinum) { struct mount *mp; struct file *fp; struct vnode *vp; struct nameidata nd; struct stat sb; int error; fp = NULL; if (fd != FD_NONE) { error = getvnode(td, fd, &cap_no_rights, &fp); if (error != 0) return (error); } restart: bwillwrite(); NDINIT_ATRIGHTS(&nd, DELETE, LOCKPARENT | LOCKLEAF | AUDITVNODE1 | ((flag & AT_BENEATH) != 0 ? BENEATH : 0), pathseg, path, dfd, &cap_unlinkat_rights, td); if ((error = namei(&nd)) != 0) { if (error == EINVAL) error = EPERM; goto fdout; } vp = nd.ni_vp; if (vp->v_type == VDIR && oldinum == 0) { error = EPERM; /* POSIX */ } else if (oldinum != 0 && - ((error = vn_stat(vp, &sb, td->td_ucred, NOCRED, td)) == 0) && + ((error = VOP_STAT(vp, &sb, td->td_ucred, NOCRED, td)) == 0) && sb.st_ino != oldinum) { error = EIDRM; /* Identifier removed */ } else if (fp != NULL && fp->f_vnode != vp) { if (VN_IS_DOOMED(fp->f_vnode)) error = EBADF; else error = EDEADLK; } else { /* * The root of a mounted filesystem cannot be deleted. * * XXX: can this only be a VDIR case? */ if (vp->v_vflag & VV_ROOT) error = EBUSY; } if (error == 0) { if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); if (vp == nd.ni_dvp) vrele(vp); else vput(vp); if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) { goto fdout; } goto restart; } #ifdef MAC error = mac_vnode_check_unlink(td->td_ucred, nd.ni_dvp, vp, &nd.ni_cnd); if (error != 0) goto out; #endif vfs_notify_upper(vp, VFS_NOTIFY_UPPER_UNLINK); error = VOP_REMOVE(nd.ni_dvp, vp, &nd.ni_cnd); #ifdef MAC out: #endif vn_finished_write(mp); } NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); if (vp == nd.ni_dvp) vrele(vp); else vput(vp); fdout: if (fp != NULL) fdrop(fp, td); return (error); } /* * Reposition read/write file offset. */ #ifndef _SYS_SYSPROTO_H_ struct lseek_args { int fd; int pad; off_t offset; int whence; }; #endif int sys_lseek(struct thread *td, struct lseek_args *uap) { return (kern_lseek(td, uap->fd, uap->offset, uap->whence)); } int kern_lseek(struct thread *td, int fd, off_t offset, int whence) { struct file *fp; int error; AUDIT_ARG_FD(fd); error = fget(td, fd, &cap_seek_rights, &fp); if (error != 0) return (error); error = (fp->f_ops->fo_flags & DFLAG_SEEKABLE) != 0 ? fo_seek(fp, offset, whence, td) : ESPIPE; fdrop(fp, td); return (error); } #if defined(COMPAT_43) /* * Reposition read/write file offset. */ #ifndef _SYS_SYSPROTO_H_ struct olseek_args { int fd; long offset; int whence; }; #endif int olseek(struct thread *td, struct olseek_args *uap) { return (kern_lseek(td, uap->fd, uap->offset, uap->whence)); } #endif /* COMPAT_43 */ #if defined(COMPAT_FREEBSD6) /* Version with the 'pad' argument */ int freebsd6_lseek(struct thread *td, struct freebsd6_lseek_args *uap) { return (kern_lseek(td, uap->fd, uap->offset, uap->whence)); } #endif /* * Check access permissions using passed credentials. */ static int vn_access(struct vnode *vp, int user_flags, struct ucred *cred, struct thread *td) { accmode_t accmode; int error; /* Flags == 0 means only check for existence. */ if (user_flags == 0) return (0); accmode = 0; if (user_flags & R_OK) accmode |= VREAD; if (user_flags & W_OK) accmode |= VWRITE; if (user_flags & X_OK) accmode |= VEXEC; #ifdef MAC error = mac_vnode_check_access(cred, vp, accmode); if (error != 0) return (error); #endif if ((accmode & VWRITE) == 0 || (error = vn_writechk(vp)) == 0) error = VOP_ACCESS(vp, accmode, cred, td); return (error); } /* * Check access permissions using "real" credentials. */ #ifndef _SYS_SYSPROTO_H_ struct access_args { char *path; int amode; }; #endif int sys_access(struct thread *td, struct access_args *uap) { return (kern_accessat(td, AT_FDCWD, uap->path, UIO_USERSPACE, 0, uap->amode)); } #ifndef _SYS_SYSPROTO_H_ struct faccessat_args { int dirfd; char *path; int amode; int flag; } #endif int sys_faccessat(struct thread *td, struct faccessat_args *uap) { return (kern_accessat(td, uap->fd, uap->path, UIO_USERSPACE, uap->flag, uap->amode)); } int kern_accessat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, int flag, int amode) { struct ucred *cred, *usecred; struct vnode *vp; struct nameidata nd; int error; if ((flag & ~(AT_EACCESS | AT_BENEATH)) != 0) return (EINVAL); if (amode != F_OK && (amode & ~(R_OK | W_OK | X_OK)) != 0) return (EINVAL); /* * Create and modify a temporary credential instead of one that * is potentially shared (if we need one). */ cred = td->td_ucred; if ((flag & AT_EACCESS) == 0 && ((cred->cr_uid != cred->cr_ruid || cred->cr_rgid != cred->cr_groups[0]))) { usecred = crdup(cred); usecred->cr_uid = cred->cr_ruid; usecred->cr_groups[0] = cred->cr_rgid; td->td_ucred = usecred; } else usecred = cred; AUDIT_ARG_VALUE(amode); NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1 | ((flag & AT_BENEATH) != 0 ? BENEATH : 0), pathseg, path, fd, &cap_fstat_rights, td); if ((error = namei(&nd)) != 0) goto out; vp = nd.ni_vp; error = vn_access(vp, amode, usecred, td); NDFREE(&nd, NDF_ONLY_PNBUF); vput(vp); out: if (usecred != cred) { td->td_ucred = cred; crfree(usecred); } return (error); } /* * Check access permissions using "effective" credentials. */ #ifndef _SYS_SYSPROTO_H_ struct eaccess_args { char *path; int amode; }; #endif int sys_eaccess(struct thread *td, struct eaccess_args *uap) { return (kern_accessat(td, AT_FDCWD, uap->path, UIO_USERSPACE, AT_EACCESS, uap->amode)); } #if defined(COMPAT_43) /* * Get file status; this version follows links. */ #ifndef _SYS_SYSPROTO_H_ struct ostat_args { char *path; struct ostat *ub; }; #endif int ostat(struct thread *td, struct ostat_args *uap) { struct stat sb; struct ostat osb; int error; error = kern_statat(td, 0, AT_FDCWD, uap->path, UIO_USERSPACE, &sb, NULL); if (error != 0) return (error); cvtstat(&sb, &osb); return (copyout(&osb, uap->ub, sizeof (osb))); } /* * Get file status; this version does not follow links. */ #ifndef _SYS_SYSPROTO_H_ struct olstat_args { char *path; struct ostat *ub; }; #endif int olstat(struct thread *td, struct olstat_args *uap) { struct stat sb; struct ostat osb; int error; error = kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->path, UIO_USERSPACE, &sb, NULL); if (error != 0) return (error); cvtstat(&sb, &osb); return (copyout(&osb, uap->ub, sizeof (osb))); } /* * Convert from an old to a new stat structure. * XXX: many values are blindly truncated. */ void cvtstat(struct stat *st, struct ostat *ost) { bzero(ost, sizeof(*ost)); ost->st_dev = st->st_dev; ost->st_ino = st->st_ino; ost->st_mode = st->st_mode; ost->st_nlink = st->st_nlink; ost->st_uid = st->st_uid; ost->st_gid = st->st_gid; ost->st_rdev = st->st_rdev; ost->st_size = MIN(st->st_size, INT32_MAX); ost->st_atim = st->st_atim; ost->st_mtim = st->st_mtim; ost->st_ctim = st->st_ctim; ost->st_blksize = st->st_blksize; ost->st_blocks = st->st_blocks; ost->st_flags = st->st_flags; ost->st_gen = st->st_gen; } #endif /* COMPAT_43 */ #if defined(COMPAT_43) || defined(COMPAT_FREEBSD11) int ino64_trunc_error; SYSCTL_INT(_vfs, OID_AUTO, ino64_trunc_error, CTLFLAG_RW, &ino64_trunc_error, 0, "Error on truncation of device, file or inode number, or link count"); int freebsd11_cvtstat(struct stat *st, struct freebsd11_stat *ost) { ost->st_dev = st->st_dev; if (ost->st_dev != st->st_dev) { switch (ino64_trunc_error) { default: /* * Since dev_t is almost raw, don't clamp to the * maximum for case 2, but ignore the error. */ break; case 1: return (EOVERFLOW); } } ost->st_ino = st->st_ino; if (ost->st_ino != st->st_ino) { switch (ino64_trunc_error) { default: case 0: break; case 1: return (EOVERFLOW); case 2: ost->st_ino = UINT32_MAX; break; } } ost->st_mode = st->st_mode; ost->st_nlink = st->st_nlink; if (ost->st_nlink != st->st_nlink) { switch (ino64_trunc_error) { default: case 0: break; case 1: return (EOVERFLOW); case 2: ost->st_nlink = UINT16_MAX; break; } } ost->st_uid = st->st_uid; ost->st_gid = st->st_gid; ost->st_rdev = st->st_rdev; if (ost->st_rdev != st->st_rdev) { switch (ino64_trunc_error) { default: break; case 1: return (EOVERFLOW); } } ost->st_atim = st->st_atim; ost->st_mtim = st->st_mtim; ost->st_ctim = st->st_ctim; ost->st_size = st->st_size; ost->st_blocks = st->st_blocks; ost->st_blksize = st->st_blksize; ost->st_flags = st->st_flags; ost->st_gen = st->st_gen; ost->st_lspare = 0; ost->st_birthtim = st->st_birthtim; bzero((char *)&ost->st_birthtim + sizeof(ost->st_birthtim), sizeof(*ost) - offsetof(struct freebsd11_stat, st_birthtim) - sizeof(ost->st_birthtim)); return (0); } int freebsd11_stat(struct thread *td, struct freebsd11_stat_args* uap) { struct stat sb; struct freebsd11_stat osb; int error; error = kern_statat(td, 0, AT_FDCWD, uap->path, UIO_USERSPACE, &sb, NULL); if (error != 0) return (error); error = freebsd11_cvtstat(&sb, &osb); if (error == 0) error = copyout(&osb, uap->ub, sizeof(osb)); return (error); } int freebsd11_lstat(struct thread *td, struct freebsd11_lstat_args* uap) { struct stat sb; struct freebsd11_stat osb; int error; error = kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->path, UIO_USERSPACE, &sb, NULL); if (error != 0) return (error); error = freebsd11_cvtstat(&sb, &osb); if (error == 0) error = copyout(&osb, uap->ub, sizeof(osb)); return (error); } int freebsd11_fhstat(struct thread *td, struct freebsd11_fhstat_args* uap) { struct fhandle fh; struct stat sb; struct freebsd11_stat osb; int error; error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t)); if (error != 0) return (error); error = kern_fhstat(td, fh, &sb); if (error != 0) return (error); error = freebsd11_cvtstat(&sb, &osb); if (error == 0) error = copyout(&osb, uap->sb, sizeof(osb)); return (error); } int freebsd11_fstatat(struct thread *td, struct freebsd11_fstatat_args* uap) { struct stat sb; struct freebsd11_stat osb; int error; error = kern_statat(td, uap->flag, uap->fd, uap->path, UIO_USERSPACE, &sb, NULL); if (error != 0) return (error); error = freebsd11_cvtstat(&sb, &osb); if (error == 0) error = copyout(&osb, uap->buf, sizeof(osb)); return (error); } #endif /* COMPAT_FREEBSD11 */ /* * Get file status */ #ifndef _SYS_SYSPROTO_H_ struct fstatat_args { int fd; char *path; struct stat *buf; int flag; } #endif int sys_fstatat(struct thread *td, struct fstatat_args *uap) { struct stat sb; int error; error = kern_statat(td, uap->flag, uap->fd, uap->path, UIO_USERSPACE, &sb, NULL); if (error == 0) error = copyout(&sb, uap->buf, sizeof (sb)); return (error); } int kern_statat(struct thread *td, int flag, int fd, const char *path, enum uio_seg pathseg, struct stat *sbp, void (*hook)(struct vnode *vp, struct stat *sbp)) { struct nameidata nd; int error; if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_BENEATH)) != 0) return (EINVAL); NDINIT_ATRIGHTS(&nd, LOOKUP, ((flag & AT_SYMLINK_NOFOLLOW) != 0 ? NOFOLLOW : FOLLOW) | ((flag & AT_BENEATH) != 0 ? BENEATH : 0) | LOCKSHARED | LOCKLEAF | AUDITVNODE1, pathseg, path, fd, &cap_fstat_rights, td); if ((error = namei(&nd)) != 0) return (error); - error = vn_stat(nd.ni_vp, sbp, td->td_ucred, NOCRED, td); + error = VOP_STAT(nd.ni_vp, sbp, td->td_ucred, NOCRED, td); if (error == 0) { SDT_PROBE2(vfs, , stat, mode, path, sbp->st_mode); if (S_ISREG(sbp->st_mode)) SDT_PROBE2(vfs, , stat, reg, path, pathseg); if (__predict_false(hook != NULL)) hook(nd.ni_vp, sbp); } NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_vp); #ifdef __STAT_TIME_T_EXT sbp->st_atim_ext = 0; sbp->st_mtim_ext = 0; sbp->st_ctim_ext = 0; sbp->st_btim_ext = 0; #endif #ifdef KTRACE if (KTRPOINT(td, KTR_STRUCT)) ktrstat_error(sbp, error); #endif return (error); } #if defined(COMPAT_FREEBSD11) /* * Implementation of the NetBSD [l]stat() functions. */ void freebsd11_cvtnstat(struct stat *sb, struct nstat *nsb) { bzero(nsb, sizeof(*nsb)); nsb->st_dev = sb->st_dev; nsb->st_ino = sb->st_ino; nsb->st_mode = sb->st_mode; nsb->st_nlink = sb->st_nlink; nsb->st_uid = sb->st_uid; nsb->st_gid = sb->st_gid; nsb->st_rdev = sb->st_rdev; nsb->st_atim = sb->st_atim; nsb->st_mtim = sb->st_mtim; nsb->st_ctim = sb->st_ctim; nsb->st_size = sb->st_size; nsb->st_blocks = sb->st_blocks; nsb->st_blksize = sb->st_blksize; nsb->st_flags = sb->st_flags; nsb->st_gen = sb->st_gen; nsb->st_birthtim = sb->st_birthtim; } #ifndef _SYS_SYSPROTO_H_ struct freebsd11_nstat_args { char *path; struct nstat *ub; }; #endif int freebsd11_nstat(struct thread *td, struct freebsd11_nstat_args *uap) { struct stat sb; struct nstat nsb; int error; error = kern_statat(td, 0, AT_FDCWD, uap->path, UIO_USERSPACE, &sb, NULL); if (error != 0) return (error); freebsd11_cvtnstat(&sb, &nsb); return (copyout(&nsb, uap->ub, sizeof (nsb))); } /* * NetBSD lstat. Get file status; this version does not follow links. */ #ifndef _SYS_SYSPROTO_H_ struct freebsd11_nlstat_args { char *path; struct nstat *ub; }; #endif int freebsd11_nlstat(struct thread *td, struct freebsd11_nlstat_args *uap) { struct stat sb; struct nstat nsb; int error; error = kern_statat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->path, UIO_USERSPACE, &sb, NULL); if (error != 0) return (error); freebsd11_cvtnstat(&sb, &nsb); return (copyout(&nsb, uap->ub, sizeof (nsb))); } #endif /* COMPAT_FREEBSD11 */ /* * Get configurable pathname variables. */ #ifndef _SYS_SYSPROTO_H_ struct pathconf_args { char *path; int name; }; #endif int sys_pathconf(struct thread *td, struct pathconf_args *uap) { long value; int error; error = kern_pathconf(td, uap->path, UIO_USERSPACE, uap->name, FOLLOW, &value); if (error == 0) td->td_retval[0] = value; return (error); } #ifndef _SYS_SYSPROTO_H_ struct lpathconf_args { char *path; int name; }; #endif int sys_lpathconf(struct thread *td, struct lpathconf_args *uap) { long value; int error; error = kern_pathconf(td, uap->path, UIO_USERSPACE, uap->name, NOFOLLOW, &value); if (error == 0) td->td_retval[0] = value; return (error); } int kern_pathconf(struct thread *td, const char *path, enum uio_seg pathseg, int name, u_long flags, long *valuep) { struct nameidata nd; int error; NDINIT(&nd, LOOKUP, LOCKSHARED | LOCKLEAF | AUDITVNODE1 | flags, pathseg, path, td); if ((error = namei(&nd)) != 0) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); error = VOP_PATHCONF(nd.ni_vp, name, valuep); vput(nd.ni_vp); return (error); } /* * Return target name of a symbolic link. */ #ifndef _SYS_SYSPROTO_H_ struct readlink_args { char *path; char *buf; size_t count; }; #endif int sys_readlink(struct thread *td, struct readlink_args *uap) { return (kern_readlinkat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->buf, UIO_USERSPACE, uap->count)); } #ifndef _SYS_SYSPROTO_H_ struct readlinkat_args { int fd; char *path; char *buf; size_t bufsize; }; #endif int sys_readlinkat(struct thread *td, struct readlinkat_args *uap) { return (kern_readlinkat(td, uap->fd, uap->path, UIO_USERSPACE, uap->buf, UIO_USERSPACE, uap->bufsize)); } int kern_readlinkat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, char *buf, enum uio_seg bufseg, size_t count) { struct vnode *vp; struct nameidata nd; int error; if (count > IOSIZE_MAX) return (EINVAL); NDINIT_AT(&nd, LOOKUP, NOFOLLOW | LOCKSHARED | LOCKLEAF | AUDITVNODE1, pathseg, path, fd, td); if ((error = namei(&nd)) != 0) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); vp = nd.ni_vp; error = kern_readlink_vp(vp, buf, bufseg, count, td); vput(vp); return (error); } /* * Helper function to readlink from a vnode */ static int kern_readlink_vp(struct vnode *vp, char *buf, enum uio_seg bufseg, size_t count, struct thread *td) { struct iovec aiov; struct uio auio; int error; ASSERT_VOP_LOCKED(vp, "kern_readlink_vp(): vp not locked"); #ifdef MAC error = mac_vnode_check_readlink(td->td_ucred, vp); if (error != 0) return (error); #endif if (vp->v_type != VLNK && (vp->v_vflag & VV_READLINK) == 0) return (EINVAL); aiov.iov_base = buf; aiov.iov_len = count; auio.uio_iov = &aiov; auio.uio_iovcnt = 1; auio.uio_offset = 0; auio.uio_rw = UIO_READ; auio.uio_segflg = bufseg; auio.uio_td = td; auio.uio_resid = count; error = VOP_READLINK(vp, &auio, td->td_ucred); td->td_retval[0] = count - auio.uio_resid; return (error); } /* * Common implementation code for chflags() and fchflags(). */ static int setfflags(struct thread *td, struct vnode *vp, u_long flags) { struct mount *mp; struct vattr vattr; int error; /* We can't support the value matching VNOVAL. */ if (flags == VNOVAL) return (EOPNOTSUPP); /* * Prevent non-root users from setting flags on devices. When * a device is reused, users can retain ownership of the device * if they are allowed to set flags and programs assume that * chown can't fail when done as root. */ if (vp->v_type == VCHR || vp->v_type == VBLK) { error = priv_check(td, PRIV_VFS_CHFLAGS_DEV); if (error != 0) return (error); } if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) return (error); VATTR_NULL(&vattr); vattr.va_flags = flags; vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); #ifdef MAC error = mac_vnode_check_setflags(td->td_ucred, vp, vattr.va_flags); if (error == 0) #endif error = VOP_SETATTR(vp, &vattr, td->td_ucred); VOP_UNLOCK(vp); vn_finished_write(mp); return (error); } /* * Change flags of a file given a path name. */ #ifndef _SYS_SYSPROTO_H_ struct chflags_args { const char *path; u_long flags; }; #endif int sys_chflags(struct thread *td, struct chflags_args *uap) { return (kern_chflagsat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->flags, 0)); } #ifndef _SYS_SYSPROTO_H_ struct chflagsat_args { int fd; const char *path; u_long flags; int atflag; } #endif int sys_chflagsat(struct thread *td, struct chflagsat_args *uap) { if ((uap->atflag & ~(AT_SYMLINK_NOFOLLOW | AT_BENEATH)) != 0) return (EINVAL); return (kern_chflagsat(td, uap->fd, uap->path, UIO_USERSPACE, uap->flags, uap->atflag)); } /* * Same as chflags() but doesn't follow symlinks. */ #ifndef _SYS_SYSPROTO_H_ struct lchflags_args { const char *path; u_long flags; }; #endif int sys_lchflags(struct thread *td, struct lchflags_args *uap) { return (kern_chflagsat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->flags, AT_SYMLINK_NOFOLLOW)); } static int kern_chflagsat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, u_long flags, int atflag) { struct nameidata nd; int error, follow; AUDIT_ARG_FFLAGS(flags); follow = (atflag & AT_SYMLINK_NOFOLLOW) ? NOFOLLOW : FOLLOW; follow |= (atflag & AT_BENEATH) != 0 ? BENEATH : 0; NDINIT_ATRIGHTS(&nd, LOOKUP, follow | AUDITVNODE1, pathseg, path, fd, &cap_fchflags_rights, td); if ((error = namei(&nd)) != 0) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); error = setfflags(td, nd.ni_vp, flags); vrele(nd.ni_vp); return (error); } /* * Change flags of a file given a file descriptor. */ #ifndef _SYS_SYSPROTO_H_ struct fchflags_args { int fd; u_long flags; }; #endif int sys_fchflags(struct thread *td, struct fchflags_args *uap) { struct file *fp; int error; AUDIT_ARG_FD(uap->fd); AUDIT_ARG_FFLAGS(uap->flags); error = getvnode(td, uap->fd, &cap_fchflags_rights, &fp); if (error != 0) return (error); #ifdef AUDIT vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY); AUDIT_ARG_VNODE1(fp->f_vnode); VOP_UNLOCK(fp->f_vnode); #endif error = setfflags(td, fp->f_vnode, uap->flags); fdrop(fp, td); return (error); } /* * Common implementation code for chmod(), lchmod() and fchmod(). */ int setfmode(struct thread *td, struct ucred *cred, struct vnode *vp, int mode) { struct mount *mp; struct vattr vattr; int error; if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) return (error); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); VATTR_NULL(&vattr); vattr.va_mode = mode & ALLPERMS; #ifdef MAC error = mac_vnode_check_setmode(cred, vp, vattr.va_mode); if (error == 0) #endif error = VOP_SETATTR(vp, &vattr, cred); VOP_UNLOCK(vp); vn_finished_write(mp); return (error); } /* * Change mode of a file given path name. */ #ifndef _SYS_SYSPROTO_H_ struct chmod_args { char *path; int mode; }; #endif int sys_chmod(struct thread *td, struct chmod_args *uap) { return (kern_fchmodat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->mode, 0)); } #ifndef _SYS_SYSPROTO_H_ struct fchmodat_args { int dirfd; char *path; mode_t mode; int flag; } #endif int sys_fchmodat(struct thread *td, struct fchmodat_args *uap) { if ((uap->flag & ~(AT_SYMLINK_NOFOLLOW | AT_BENEATH)) != 0) return (EINVAL); return (kern_fchmodat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode, uap->flag)); } /* * Change mode of a file given path name (don't follow links.) */ #ifndef _SYS_SYSPROTO_H_ struct lchmod_args { char *path; int mode; }; #endif int sys_lchmod(struct thread *td, struct lchmod_args *uap) { return (kern_fchmodat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->mode, AT_SYMLINK_NOFOLLOW)); } int kern_fchmodat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, mode_t mode, int flag) { struct nameidata nd; int error, follow; AUDIT_ARG_MODE(mode); follow = (flag & AT_SYMLINK_NOFOLLOW) != 0 ? NOFOLLOW : FOLLOW; follow |= (flag & AT_BENEATH) != 0 ? BENEATH : 0; NDINIT_ATRIGHTS(&nd, LOOKUP, follow | AUDITVNODE1, pathseg, path, fd, &cap_fchmod_rights, td); if ((error = namei(&nd)) != 0) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); error = setfmode(td, td->td_ucred, nd.ni_vp, mode); vrele(nd.ni_vp); return (error); } /* * Change mode of a file given a file descriptor. */ #ifndef _SYS_SYSPROTO_H_ struct fchmod_args { int fd; int mode; }; #endif int sys_fchmod(struct thread *td, struct fchmod_args *uap) { struct file *fp; int error; AUDIT_ARG_FD(uap->fd); AUDIT_ARG_MODE(uap->mode); error = fget(td, uap->fd, &cap_fchmod_rights, &fp); if (error != 0) return (error); error = fo_chmod(fp, uap->mode, td->td_ucred, td); fdrop(fp, td); return (error); } /* * Common implementation for chown(), lchown(), and fchown() */ int setfown(struct thread *td, struct ucred *cred, struct vnode *vp, uid_t uid, gid_t gid) { struct mount *mp; struct vattr vattr; int error; if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) return (error); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); VATTR_NULL(&vattr); vattr.va_uid = uid; vattr.va_gid = gid; #ifdef MAC error = mac_vnode_check_setowner(cred, vp, vattr.va_uid, vattr.va_gid); if (error == 0) #endif error = VOP_SETATTR(vp, &vattr, cred); VOP_UNLOCK(vp); vn_finished_write(mp); return (error); } /* * Set ownership given a path name. */ #ifndef _SYS_SYSPROTO_H_ struct chown_args { char *path; int uid; int gid; }; #endif int sys_chown(struct thread *td, struct chown_args *uap) { return (kern_fchownat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->uid, uap->gid, 0)); } #ifndef _SYS_SYSPROTO_H_ struct fchownat_args { int fd; const char * path; uid_t uid; gid_t gid; int flag; }; #endif int sys_fchownat(struct thread *td, struct fchownat_args *uap) { if ((uap->flag & ~(AT_SYMLINK_NOFOLLOW | AT_BENEATH)) != 0) return (EINVAL); return (kern_fchownat(td, uap->fd, uap->path, UIO_USERSPACE, uap->uid, uap->gid, uap->flag)); } int kern_fchownat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, int uid, int gid, int flag) { struct nameidata nd; int error, follow; AUDIT_ARG_OWNER(uid, gid); follow = (flag & AT_SYMLINK_NOFOLLOW) ? NOFOLLOW : FOLLOW; follow |= (flag & AT_BENEATH) != 0 ? BENEATH : 0; NDINIT_ATRIGHTS(&nd, LOOKUP, follow | AUDITVNODE1, pathseg, path, fd, &cap_fchown_rights, td); if ((error = namei(&nd)) != 0) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); error = setfown(td, td->td_ucred, nd.ni_vp, uid, gid); vrele(nd.ni_vp); return (error); } /* * Set ownership given a path name, do not cross symlinks. */ #ifndef _SYS_SYSPROTO_H_ struct lchown_args { char *path; int uid; int gid; }; #endif int sys_lchown(struct thread *td, struct lchown_args *uap) { return (kern_fchownat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->uid, uap->gid, AT_SYMLINK_NOFOLLOW)); } /* * Set ownership given a file descriptor. */ #ifndef _SYS_SYSPROTO_H_ struct fchown_args { int fd; int uid; int gid; }; #endif int sys_fchown(struct thread *td, struct fchown_args *uap) { struct file *fp; int error; AUDIT_ARG_FD(uap->fd); AUDIT_ARG_OWNER(uap->uid, uap->gid); error = fget(td, uap->fd, &cap_fchown_rights, &fp); if (error != 0) return (error); error = fo_chown(fp, uap->uid, uap->gid, td->td_ucred, td); fdrop(fp, td); return (error); } /* * Common implementation code for utimes(), lutimes(), and futimes(). */ static int getutimes(const struct timeval *usrtvp, enum uio_seg tvpseg, struct timespec *tsp) { struct timeval tv[2]; const struct timeval *tvp; int error; if (usrtvp == NULL) { vfs_timestamp(&tsp[0]); tsp[1] = tsp[0]; } else { if (tvpseg == UIO_SYSSPACE) { tvp = usrtvp; } else { if ((error = copyin(usrtvp, tv, sizeof(tv))) != 0) return (error); tvp = tv; } if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000 || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000) return (EINVAL); TIMEVAL_TO_TIMESPEC(&tvp[0], &tsp[0]); TIMEVAL_TO_TIMESPEC(&tvp[1], &tsp[1]); } return (0); } /* * Common implementation code for futimens(), utimensat(). */ #define UTIMENS_NULL 0x1 #define UTIMENS_EXIT 0x2 static int getutimens(const struct timespec *usrtsp, enum uio_seg tspseg, struct timespec *tsp, int *retflags) { struct timespec tsnow; int error; vfs_timestamp(&tsnow); *retflags = 0; if (usrtsp == NULL) { tsp[0] = tsnow; tsp[1] = tsnow; *retflags |= UTIMENS_NULL; return (0); } if (tspseg == UIO_SYSSPACE) { tsp[0] = usrtsp[0]; tsp[1] = usrtsp[1]; } else if ((error = copyin(usrtsp, tsp, sizeof(*tsp) * 2)) != 0) return (error); if (tsp[0].tv_nsec == UTIME_OMIT && tsp[1].tv_nsec == UTIME_OMIT) *retflags |= UTIMENS_EXIT; if (tsp[0].tv_nsec == UTIME_NOW && tsp[1].tv_nsec == UTIME_NOW) *retflags |= UTIMENS_NULL; if (tsp[0].tv_nsec == UTIME_OMIT) tsp[0].tv_sec = VNOVAL; else if (tsp[0].tv_nsec == UTIME_NOW) tsp[0] = tsnow; else if (tsp[0].tv_nsec < 0 || tsp[0].tv_nsec >= 1000000000L) return (EINVAL); if (tsp[1].tv_nsec == UTIME_OMIT) tsp[1].tv_sec = VNOVAL; else if (tsp[1].tv_nsec == UTIME_NOW) tsp[1] = tsnow; else if (tsp[1].tv_nsec < 0 || tsp[1].tv_nsec >= 1000000000L) return (EINVAL); return (0); } /* * Common implementation code for utimes(), lutimes(), futimes(), futimens(), * and utimensat(). */ static int setutimes(struct thread *td, struct vnode *vp, const struct timespec *ts, int numtimes, int nullflag) { struct mount *mp; struct vattr vattr; int error, setbirthtime; if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) return (error); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); setbirthtime = 0; if (numtimes < 3 && !VOP_GETATTR(vp, &vattr, td->td_ucred) && timespeccmp(&ts[1], &vattr.va_birthtime, < )) setbirthtime = 1; VATTR_NULL(&vattr); vattr.va_atime = ts[0]; vattr.va_mtime = ts[1]; if (setbirthtime) vattr.va_birthtime = ts[1]; if (numtimes > 2) vattr.va_birthtime = ts[2]; if (nullflag) vattr.va_vaflags |= VA_UTIMES_NULL; #ifdef MAC error = mac_vnode_check_setutimes(td->td_ucred, vp, vattr.va_atime, vattr.va_mtime); #endif if (error == 0) error = VOP_SETATTR(vp, &vattr, td->td_ucred); VOP_UNLOCK(vp); vn_finished_write(mp); return (error); } /* * Set the access and modification times of a file. */ #ifndef _SYS_SYSPROTO_H_ struct utimes_args { char *path; struct timeval *tptr; }; #endif int sys_utimes(struct thread *td, struct utimes_args *uap) { return (kern_utimesat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->tptr, UIO_USERSPACE)); } #ifndef _SYS_SYSPROTO_H_ struct futimesat_args { int fd; const char * path; const struct timeval * times; }; #endif int sys_futimesat(struct thread *td, struct futimesat_args *uap) { return (kern_utimesat(td, uap->fd, uap->path, UIO_USERSPACE, uap->times, UIO_USERSPACE)); } int kern_utimesat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, struct timeval *tptr, enum uio_seg tptrseg) { struct nameidata nd; struct timespec ts[2]; int error; if ((error = getutimes(tptr, tptrseg, ts)) != 0) return (error); NDINIT_ATRIGHTS(&nd, LOOKUP, FOLLOW | AUDITVNODE1, pathseg, path, fd, &cap_futimes_rights, td); if ((error = namei(&nd)) != 0) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); error = setutimes(td, nd.ni_vp, ts, 2, tptr == NULL); vrele(nd.ni_vp); return (error); } /* * Set the access and modification times of a file. */ #ifndef _SYS_SYSPROTO_H_ struct lutimes_args { char *path; struct timeval *tptr; }; #endif int sys_lutimes(struct thread *td, struct lutimes_args *uap) { return (kern_lutimes(td, uap->path, UIO_USERSPACE, uap->tptr, UIO_USERSPACE)); } int kern_lutimes(struct thread *td, const char *path, enum uio_seg pathseg, struct timeval *tptr, enum uio_seg tptrseg) { struct timespec ts[2]; struct nameidata nd; int error; if ((error = getutimes(tptr, tptrseg, ts)) != 0) return (error); NDINIT(&nd, LOOKUP, NOFOLLOW | AUDITVNODE1, pathseg, path, td); if ((error = namei(&nd)) != 0) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); error = setutimes(td, nd.ni_vp, ts, 2, tptr == NULL); vrele(nd.ni_vp); return (error); } /* * Set the access and modification times of a file. */ #ifndef _SYS_SYSPROTO_H_ struct futimes_args { int fd; struct timeval *tptr; }; #endif int sys_futimes(struct thread *td, struct futimes_args *uap) { return (kern_futimes(td, uap->fd, uap->tptr, UIO_USERSPACE)); } int kern_futimes(struct thread *td, int fd, struct timeval *tptr, enum uio_seg tptrseg) { struct timespec ts[2]; struct file *fp; int error; AUDIT_ARG_FD(fd); error = getutimes(tptr, tptrseg, ts); if (error != 0) return (error); error = getvnode(td, fd, &cap_futimes_rights, &fp); if (error != 0) return (error); #ifdef AUDIT vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY); AUDIT_ARG_VNODE1(fp->f_vnode); VOP_UNLOCK(fp->f_vnode); #endif error = setutimes(td, fp->f_vnode, ts, 2, tptr == NULL); fdrop(fp, td); return (error); } int sys_futimens(struct thread *td, struct futimens_args *uap) { return (kern_futimens(td, uap->fd, uap->times, UIO_USERSPACE)); } int kern_futimens(struct thread *td, int fd, struct timespec *tptr, enum uio_seg tptrseg) { struct timespec ts[2]; struct file *fp; int error, flags; AUDIT_ARG_FD(fd); error = getutimens(tptr, tptrseg, ts, &flags); if (error != 0) return (error); if (flags & UTIMENS_EXIT) return (0); error = getvnode(td, fd, &cap_futimes_rights, &fp); if (error != 0) return (error); #ifdef AUDIT vn_lock(fp->f_vnode, LK_SHARED | LK_RETRY); AUDIT_ARG_VNODE1(fp->f_vnode); VOP_UNLOCK(fp->f_vnode); #endif error = setutimes(td, fp->f_vnode, ts, 2, flags & UTIMENS_NULL); fdrop(fp, td); return (error); } int sys_utimensat(struct thread *td, struct utimensat_args *uap) { return (kern_utimensat(td, uap->fd, uap->path, UIO_USERSPACE, uap->times, UIO_USERSPACE, uap->flag)); } int kern_utimensat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, struct timespec *tptr, enum uio_seg tptrseg, int flag) { struct nameidata nd; struct timespec ts[2]; int error, flags; if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_BENEATH)) != 0) return (EINVAL); if ((error = getutimens(tptr, tptrseg, ts, &flags)) != 0) return (error); NDINIT_ATRIGHTS(&nd, LOOKUP, ((flag & AT_SYMLINK_NOFOLLOW) ? NOFOLLOW : FOLLOW) | ((flag & AT_BENEATH) != 0 ? BENEATH : 0) | AUDITVNODE1, pathseg, path, fd, &cap_futimes_rights, td); if ((error = namei(&nd)) != 0) return (error); /* * We are allowed to call namei() regardless of 2xUTIME_OMIT. * POSIX states: * "If both tv_nsec fields are UTIME_OMIT... EACCESS may be detected." * "Search permission is denied by a component of the path prefix." */ NDFREE(&nd, NDF_ONLY_PNBUF); if ((flags & UTIMENS_EXIT) == 0) error = setutimes(td, nd.ni_vp, ts, 2, flags & UTIMENS_NULL); vrele(nd.ni_vp); return (error); } /* * Truncate a file given its path name. */ #ifndef _SYS_SYSPROTO_H_ struct truncate_args { char *path; int pad; off_t length; }; #endif int sys_truncate(struct thread *td, struct truncate_args *uap) { return (kern_truncate(td, uap->path, UIO_USERSPACE, uap->length)); } int kern_truncate(struct thread *td, const char *path, enum uio_seg pathseg, off_t length) { struct mount *mp; struct vnode *vp; void *rl_cookie; struct vattr vattr; struct nameidata nd; int error; if (length < 0) return(EINVAL); NDINIT(&nd, LOOKUP, FOLLOW | AUDITVNODE1, pathseg, path, td); if ((error = namei(&nd)) != 0) return (error); vp = nd.ni_vp; rl_cookie = vn_rangelock_wlock(vp, 0, OFF_MAX); if ((error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) { vn_rangelock_unlock(vp, rl_cookie); vrele(vp); return (error); } NDFREE(&nd, NDF_ONLY_PNBUF); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); if (vp->v_type == VDIR) error = EISDIR; #ifdef MAC else if ((error = mac_vnode_check_write(td->td_ucred, NOCRED, vp))) { } #endif else if ((error = vn_writechk(vp)) == 0 && (error = VOP_ACCESS(vp, VWRITE, td->td_ucred, td)) == 0) { VATTR_NULL(&vattr); vattr.va_size = length; error = VOP_SETATTR(vp, &vattr, td->td_ucred); } VOP_UNLOCK(vp); vn_finished_write(mp); vn_rangelock_unlock(vp, rl_cookie); vrele(vp); return (error); } #if defined(COMPAT_43) /* * Truncate a file given its path name. */ #ifndef _SYS_SYSPROTO_H_ struct otruncate_args { char *path; long length; }; #endif int otruncate(struct thread *td, struct otruncate_args *uap) { return (kern_truncate(td, uap->path, UIO_USERSPACE, uap->length)); } #endif /* COMPAT_43 */ #if defined(COMPAT_FREEBSD6) /* Versions with the pad argument */ int freebsd6_truncate(struct thread *td, struct freebsd6_truncate_args *uap) { return (kern_truncate(td, uap->path, UIO_USERSPACE, uap->length)); } int freebsd6_ftruncate(struct thread *td, struct freebsd6_ftruncate_args *uap) { return (kern_ftruncate(td, uap->fd, uap->length)); } #endif int kern_fsync(struct thread *td, int fd, bool fullsync) { struct vnode *vp; struct mount *mp; struct file *fp; int error, lock_flags; AUDIT_ARG_FD(fd); error = getvnode(td, fd, &cap_fsync_rights, &fp); if (error != 0) return (error); vp = fp->f_vnode; #if 0 if (!fullsync) /* XXXKIB: compete outstanding aio writes */; #endif error = vn_start_write(vp, &mp, V_WAIT | PCATCH); if (error != 0) goto drop; if (MNT_SHARED_WRITES(mp) || ((mp == NULL) && MNT_SHARED_WRITES(vp->v_mount))) { lock_flags = LK_SHARED; } else { lock_flags = LK_EXCLUSIVE; } vn_lock(vp, lock_flags | LK_RETRY); AUDIT_ARG_VNODE1(vp); if (vp->v_object != NULL) { VM_OBJECT_WLOCK(vp->v_object); vm_object_page_clean(vp->v_object, 0, 0, 0); VM_OBJECT_WUNLOCK(vp->v_object); } error = fullsync ? VOP_FSYNC(vp, MNT_WAIT, td) : VOP_FDATASYNC(vp, td); VOP_UNLOCK(vp); vn_finished_write(mp); drop: fdrop(fp, td); return (error); } /* * Sync an open file. */ #ifndef _SYS_SYSPROTO_H_ struct fsync_args { int fd; }; #endif int sys_fsync(struct thread *td, struct fsync_args *uap) { return (kern_fsync(td, uap->fd, true)); } int sys_fdatasync(struct thread *td, struct fdatasync_args *uap) { return (kern_fsync(td, uap->fd, false)); } /* * Rename files. Source and destination must either both be directories, or * both not be directories. If target is a directory, it must be empty. */ #ifndef _SYS_SYSPROTO_H_ struct rename_args { char *from; char *to; }; #endif int sys_rename(struct thread *td, struct rename_args *uap) { return (kern_renameat(td, AT_FDCWD, uap->from, AT_FDCWD, uap->to, UIO_USERSPACE)); } #ifndef _SYS_SYSPROTO_H_ struct renameat_args { int oldfd; char *old; int newfd; char *new; }; #endif int sys_renameat(struct thread *td, struct renameat_args *uap) { return (kern_renameat(td, uap->oldfd, uap->old, uap->newfd, uap->new, UIO_USERSPACE)); } #ifdef MAC static int kern_renameat_mac(struct thread *td, int oldfd, const char *old, int newfd, const char *new, enum uio_seg pathseg, struct nameidata *fromnd) { int error; NDINIT_ATRIGHTS(fromnd, DELETE, LOCKPARENT | LOCKLEAF | SAVESTART | AUDITVNODE1, pathseg, old, oldfd, &cap_renameat_source_rights, td); if ((error = namei(fromnd)) != 0) return (error); error = mac_vnode_check_rename_from(td->td_ucred, fromnd->ni_dvp, fromnd->ni_vp, &fromnd->ni_cnd); VOP_UNLOCK(fromnd->ni_dvp); if (fromnd->ni_dvp != fromnd->ni_vp) VOP_UNLOCK(fromnd->ni_vp); if (error != 0) { NDFREE(fromnd, NDF_ONLY_PNBUF); vrele(fromnd->ni_dvp); vrele(fromnd->ni_vp); if (fromnd->ni_startdir) vrele(fromnd->ni_startdir); } return (error); } #endif int kern_renameat(struct thread *td, int oldfd, const char *old, int newfd, const char *new, enum uio_seg pathseg) { struct mount *mp = NULL; struct vnode *tvp, *fvp, *tdvp; struct nameidata fromnd, tond; int error; again: bwillwrite(); #ifdef MAC if (mac_vnode_check_rename_from_enabled()) { error = kern_renameat_mac(td, oldfd, old, newfd, new, pathseg, &fromnd); if (error != 0) return (error); } else { #endif NDINIT_ATRIGHTS(&fromnd, DELETE, WANTPARENT | SAVESTART | AUDITVNODE1, pathseg, old, oldfd, &cap_renameat_source_rights, td); if ((error = namei(&fromnd)) != 0) return (error); #ifdef MAC } #endif fvp = fromnd.ni_vp; NDINIT_ATRIGHTS(&tond, RENAME, LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART | AUDITVNODE2, pathseg, new, newfd, &cap_renameat_target_rights, td); if (fromnd.ni_vp->v_type == VDIR) tond.ni_cnd.cn_flags |= WILLBEDIR; if ((error = namei(&tond)) != 0) { /* Translate error code for rename("dir1", "dir2/."). */ if (error == EISDIR && fvp->v_type == VDIR) error = EINVAL; NDFREE(&fromnd, NDF_ONLY_PNBUF); vrele(fromnd.ni_dvp); vrele(fvp); goto out1; } tdvp = tond.ni_dvp; tvp = tond.ni_vp; error = vn_start_write(fvp, &mp, V_NOWAIT); if (error != 0) { NDFREE(&fromnd, NDF_ONLY_PNBUF); NDFREE(&tond, NDF_ONLY_PNBUF); if (tvp != NULL) vput(tvp); if (tdvp == tvp) vrele(tdvp); else vput(tdvp); vrele(fromnd.ni_dvp); vrele(fvp); vrele(tond.ni_startdir); if (fromnd.ni_startdir != NULL) vrele(fromnd.ni_startdir); error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH); if (error != 0) return (error); goto again; } if (tvp != NULL) { if (fvp->v_type == VDIR && tvp->v_type != VDIR) { error = ENOTDIR; goto out; } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { error = EISDIR; goto out; } #ifdef CAPABILITIES if (newfd != AT_FDCWD && (tond.ni_resflags & NIRES_ABS) == 0) { /* * If the target already exists we require CAP_UNLINKAT * from 'newfd', when newfd was used for the lookup. */ error = cap_check(&tond.ni_filecaps.fc_rights, &cap_unlinkat_rights); if (error != 0) goto out; } #endif } if (fvp == tdvp) { error = EINVAL; goto out; } /* * If the source is the same as the destination (that is, if they * are links to the same vnode), then there is nothing to do. */ if (fvp == tvp) error = -1; #ifdef MAC else error = mac_vnode_check_rename_to(td->td_ucred, tdvp, tond.ni_vp, fromnd.ni_dvp == tdvp, &tond.ni_cnd); #endif out: if (error == 0) { error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); NDFREE(&fromnd, NDF_ONLY_PNBUF); NDFREE(&tond, NDF_ONLY_PNBUF); } else { NDFREE(&fromnd, NDF_ONLY_PNBUF); NDFREE(&tond, NDF_ONLY_PNBUF); if (tvp != NULL) vput(tvp); if (tdvp == tvp) vrele(tdvp); else vput(tdvp); vrele(fromnd.ni_dvp); vrele(fvp); } vrele(tond.ni_startdir); vn_finished_write(mp); out1: if (fromnd.ni_startdir) vrele(fromnd.ni_startdir); if (error == -1) return (0); return (error); } /* * Make a directory file. */ #ifndef _SYS_SYSPROTO_H_ struct mkdir_args { char *path; int mode; }; #endif int sys_mkdir(struct thread *td, struct mkdir_args *uap) { return (kern_mkdirat(td, AT_FDCWD, uap->path, UIO_USERSPACE, uap->mode)); } #ifndef _SYS_SYSPROTO_H_ struct mkdirat_args { int fd; char *path; mode_t mode; }; #endif int sys_mkdirat(struct thread *td, struct mkdirat_args *uap) { return (kern_mkdirat(td, uap->fd, uap->path, UIO_USERSPACE, uap->mode)); } int kern_mkdirat(struct thread *td, int fd, const char *path, enum uio_seg segflg, int mode) { struct mount *mp; struct vnode *vp; struct vattr vattr; struct nameidata nd; int error; AUDIT_ARG_MODE(mode); restart: bwillwrite(); NDINIT_ATRIGHTS(&nd, CREATE, LOCKPARENT | SAVENAME | AUDITVNODE1 | NOCACHE, segflg, path, fd, &cap_mkdirat_rights, td); nd.ni_cnd.cn_flags |= WILLBEDIR; if ((error = namei(&nd)) != 0) return (error); vp = nd.ni_vp; if (vp != NULL) { NDFREE(&nd, NDF_ONLY_PNBUF); /* * XXX namei called with LOCKPARENT but not LOCKLEAF has * the strange behaviour of leaving the vnode unlocked * if the target is the same vnode as the parent. */ if (vp == nd.ni_dvp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); vrele(vp); return (EEXIST); } if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) return (error); goto restart; } VATTR_NULL(&vattr); vattr.va_type = VDIR; vattr.va_mode = (mode & ACCESSPERMS) &~ td->td_proc->p_fd->fd_cmask; #ifdef MAC error = mac_vnode_check_create(td->td_ucred, nd.ni_dvp, &nd.ni_cnd, &vattr); if (error != 0) goto out; #endif error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, &vattr); #ifdef MAC out: #endif NDFREE(&nd, NDF_ONLY_PNBUF); vput(nd.ni_dvp); if (error == 0) vput(nd.ni_vp); vn_finished_write(mp); return (error); } /* * Remove a directory file. */ #ifndef _SYS_SYSPROTO_H_ struct rmdir_args { char *path; }; #endif int sys_rmdir(struct thread *td, struct rmdir_args *uap) { return (kern_frmdirat(td, AT_FDCWD, uap->path, FD_NONE, UIO_USERSPACE, 0)); } int kern_frmdirat(struct thread *td, int dfd, const char *path, int fd, enum uio_seg pathseg, int flag) { struct mount *mp; struct vnode *vp; struct file *fp; struct nameidata nd; cap_rights_t rights; int error; fp = NULL; if (fd != FD_NONE) { error = getvnode(td, fd, cap_rights_init_one(&rights, CAP_LOOKUP), &fp); if (error != 0) return (error); } restart: bwillwrite(); NDINIT_ATRIGHTS(&nd, DELETE, LOCKPARENT | LOCKLEAF | AUDITVNODE1 | ((flag & AT_BENEATH) != 0 ? BENEATH : 0), pathseg, path, dfd, &cap_unlinkat_rights, td); if ((error = namei(&nd)) != 0) goto fdout; vp = nd.ni_vp; if (vp->v_type != VDIR) { error = ENOTDIR; goto out; } /* * No rmdir "." please. */ if (nd.ni_dvp == vp) { error = EINVAL; goto out; } /* * The root of a mounted filesystem cannot be deleted. */ if (vp->v_vflag & VV_ROOT) { error = EBUSY; goto out; } if (fp != NULL && fp->f_vnode != vp) { if (VN_IS_DOOMED(fp->f_vnode)) error = EBADF; else error = EDEADLK; goto out; } #ifdef MAC error = mac_vnode_check_unlink(td->td_ucred, nd.ni_dvp, vp, &nd.ni_cnd); if (error != 0) goto out; #endif if (vn_start_write(nd.ni_dvp, &mp, V_NOWAIT) != 0) { NDFREE(&nd, NDF_ONLY_PNBUF); vput(vp); if (nd.ni_dvp == vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) goto fdout; goto restart; } vfs_notify_upper(vp, VFS_NOTIFY_UPPER_UNLINK); error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); vn_finished_write(mp); out: NDFREE(&nd, NDF_ONLY_PNBUF); vput(vp); if (nd.ni_dvp == vp) vrele(nd.ni_dvp); else vput(nd.ni_dvp); fdout: if (fp != NULL) fdrop(fp, td); return (error); } #if defined(COMPAT_43) || defined(COMPAT_FREEBSD11) int freebsd11_kern_getdirentries(struct thread *td, int fd, char *ubuf, u_int count, long *basep, void (*func)(struct freebsd11_dirent *)) { struct freebsd11_dirent dstdp; struct dirent *dp, *edp; char *dirbuf; off_t base; ssize_t resid, ucount; int error; /* XXX arbitrary sanity limit on `count'. */ count = min(count, 64 * 1024); dirbuf = malloc(count, M_TEMP, M_WAITOK); error = kern_getdirentries(td, fd, dirbuf, count, &base, &resid, UIO_SYSSPACE); if (error != 0) goto done; if (basep != NULL) *basep = base; ucount = 0; for (dp = (struct dirent *)dirbuf, edp = (struct dirent *)&dirbuf[count - resid]; ucount < count && dp < edp; ) { if (dp->d_reclen == 0) break; MPASS(dp->d_reclen >= _GENERIC_DIRLEN(0)); if (dp->d_namlen >= sizeof(dstdp.d_name)) continue; dstdp.d_type = dp->d_type; dstdp.d_namlen = dp->d_namlen; dstdp.d_fileno = dp->d_fileno; /* truncate */ if (dstdp.d_fileno != dp->d_fileno) { switch (ino64_trunc_error) { default: case 0: break; case 1: error = EOVERFLOW; goto done; case 2: dstdp.d_fileno = UINT32_MAX; break; } } dstdp.d_reclen = sizeof(dstdp) - sizeof(dstdp.d_name) + ((dp->d_namlen + 1 + 3) &~ 3); bcopy(dp->d_name, dstdp.d_name, dstdp.d_namlen); bzero(dstdp.d_name + dstdp.d_namlen, dstdp.d_reclen - offsetof(struct freebsd11_dirent, d_name) - dstdp.d_namlen); MPASS(dstdp.d_reclen <= dp->d_reclen); MPASS(ucount + dstdp.d_reclen <= count); if (func != NULL) func(&dstdp); error = copyout(&dstdp, ubuf + ucount, dstdp.d_reclen); if (error != 0) break; dp = (struct dirent *)((char *)dp + dp->d_reclen); ucount += dstdp.d_reclen; } done: free(dirbuf, M_TEMP); if (error == 0) td->td_retval[0] = ucount; return (error); } #endif /* COMPAT */ #ifdef COMPAT_43 static void ogetdirentries_cvt(struct freebsd11_dirent *dp) { #if (BYTE_ORDER == LITTLE_ENDIAN) /* * The expected low byte of dp->d_namlen is our dp->d_type. * The high MBZ byte of dp->d_namlen is our dp->d_namlen. */ dp->d_type = dp->d_namlen; dp->d_namlen = 0; #else /* * The dp->d_type is the high byte of the expected dp->d_namlen, * so must be zero'ed. */ dp->d_type = 0; #endif } /* * Read a block of directory entries in a filesystem independent format. */ #ifndef _SYS_SYSPROTO_H_ struct ogetdirentries_args { int fd; char *buf; u_int count; long *basep; }; #endif int ogetdirentries(struct thread *td, struct ogetdirentries_args *uap) { long loff; int error; error = kern_ogetdirentries(td, uap, &loff); if (error == 0) error = copyout(&loff, uap->basep, sizeof(long)); return (error); } int kern_ogetdirentries(struct thread *td, struct ogetdirentries_args *uap, long *ploff) { long base; int error; /* XXX arbitrary sanity limit on `count'. */ if (uap->count > 64 * 1024) return (EINVAL); error = freebsd11_kern_getdirentries(td, uap->fd, uap->buf, uap->count, &base, ogetdirentries_cvt); if (error == 0 && uap->basep != NULL) error = copyout(&base, uap->basep, sizeof(long)); return (error); } #endif /* COMPAT_43 */ #if defined(COMPAT_FREEBSD11) #ifndef _SYS_SYSPROTO_H_ struct freebsd11_getdirentries_args { int fd; char *buf; u_int count; long *basep; }; #endif int freebsd11_getdirentries(struct thread *td, struct freebsd11_getdirentries_args *uap) { long base; int error; error = freebsd11_kern_getdirentries(td, uap->fd, uap->buf, uap->count, &base, NULL); if (error == 0 && uap->basep != NULL) error = copyout(&base, uap->basep, sizeof(long)); return (error); } int freebsd11_getdents(struct thread *td, struct freebsd11_getdents_args *uap) { struct freebsd11_getdirentries_args ap; ap.fd = uap->fd; ap.buf = uap->buf; ap.count = uap->count; ap.basep = NULL; return (freebsd11_getdirentries(td, &ap)); } #endif /* COMPAT_FREEBSD11 */ /* * Read a block of directory entries in a filesystem independent format. */ int sys_getdirentries(struct thread *td, struct getdirentries_args *uap) { off_t base; int error; error = kern_getdirentries(td, uap->fd, uap->buf, uap->count, &base, NULL, UIO_USERSPACE); if (error != 0) return (error); if (uap->basep != NULL) error = copyout(&base, uap->basep, sizeof(off_t)); return (error); } int kern_getdirentries(struct thread *td, int fd, char *buf, size_t count, off_t *basep, ssize_t *residp, enum uio_seg bufseg) { struct vnode *vp; struct file *fp; struct uio auio; struct iovec aiov; off_t loff; int error, eofflag; off_t foffset; AUDIT_ARG_FD(fd); if (count > IOSIZE_MAX) return (EINVAL); auio.uio_resid = count; error = getvnode(td, fd, &cap_read_rights, &fp); if (error != 0) return (error); if ((fp->f_flag & FREAD) == 0) { fdrop(fp, td); return (EBADF); } vp = fp->f_vnode; foffset = foffset_lock(fp, 0); unionread: if (vp->v_type != VDIR) { error = EINVAL; goto fail; } aiov.iov_base = buf; aiov.iov_len = count; auio.uio_iov = &aiov; auio.uio_iovcnt = 1; auio.uio_rw = UIO_READ; auio.uio_segflg = bufseg; auio.uio_td = td; vn_lock(vp, LK_SHARED | LK_RETRY); AUDIT_ARG_VNODE1(vp); loff = auio.uio_offset = foffset; #ifdef MAC error = mac_vnode_check_readdir(td->td_ucred, vp); if (error == 0) #endif error = VOP_READDIR(vp, &auio, fp->f_cred, &eofflag, NULL, NULL); foffset = auio.uio_offset; if (error != 0) { VOP_UNLOCK(vp); goto fail; } if (count == auio.uio_resid && (vp->v_vflag & VV_ROOT) && (vp->v_mount->mnt_flag & MNT_UNION)) { struct vnode *tvp = vp; vp = vp->v_mount->mnt_vnodecovered; VREF(vp); fp->f_vnode = vp; fp->f_data = vp; foffset = 0; vput(tvp); goto unionread; } VOP_UNLOCK(vp); *basep = loff; if (residp != NULL) *residp = auio.uio_resid; td->td_retval[0] = count - auio.uio_resid; fail: foffset_unlock(fp, foffset, 0); fdrop(fp, td); return (error); } /* * Set the mode mask for creation of filesystem nodes. */ #ifndef _SYS_SYSPROTO_H_ struct umask_args { int newmask; }; #endif int sys_umask(struct thread *td, struct umask_args *uap) { struct filedesc *fdp; fdp = td->td_proc->p_fd; FILEDESC_XLOCK(fdp); td->td_retval[0] = fdp->fd_cmask; fdp->fd_cmask = uap->newmask & ALLPERMS; FILEDESC_XUNLOCK(fdp); return (0); } /* * Void all references to file by ripping underlying filesystem away from * vnode. */ #ifndef _SYS_SYSPROTO_H_ struct revoke_args { char *path; }; #endif int sys_revoke(struct thread *td, struct revoke_args *uap) { struct vnode *vp; struct vattr vattr; struct nameidata nd; int error; NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | AUDITVNODE1, UIO_USERSPACE, uap->path, td); if ((error = namei(&nd)) != 0) return (error); vp = nd.ni_vp; NDFREE(&nd, NDF_ONLY_PNBUF); if (vp->v_type != VCHR || vp->v_rdev == NULL) { error = EINVAL; goto out; } #ifdef MAC error = mac_vnode_check_revoke(td->td_ucred, vp); if (error != 0) goto out; #endif error = VOP_GETATTR(vp, &vattr, td->td_ucred); if (error != 0) goto out; if (td->td_ucred->cr_uid != vattr.va_uid) { error = priv_check(td, PRIV_VFS_ADMIN); if (error != 0) goto out; } if (vp->v_usecount > 1 || vcount(vp) > 1) VOP_REVOKE(vp, REVOKEALL); out: vput(vp); return (error); } /* * Convert a user file descriptor to a kernel file entry and check that, if it * is a capability, the correct rights are present. A reference on the file * entry is held upon returning. */ int getvnode(struct thread *td, int fd, cap_rights_t *rightsp, struct file **fpp) { struct file *fp; int error; error = fget_unlocked(td->td_proc->p_fd, fd, rightsp, &fp); if (error != 0) return (error); /* * The file could be not of the vnode type, or it may be not * yet fully initialized, in which case the f_vnode pointer * may be set, but f_ops is still badfileops. E.g., * devfs_open() transiently create such situation to * facilitate csw d_fdopen(). * * Dupfdopen() handling in kern_openat() installs the * half-baked file into the process descriptor table, allowing * other thread to dereference it. Guard against the race by * checking f_ops. */ if (fp->f_vnode == NULL || fp->f_ops == &badfileops) { fdrop(fp, td); return (EINVAL); } *fpp = fp; return (0); } /* * Get an (NFS) file handle. */ #ifndef _SYS_SYSPROTO_H_ struct lgetfh_args { char *fname; fhandle_t *fhp; }; #endif int sys_lgetfh(struct thread *td, struct lgetfh_args *uap) { return (kern_getfhat(td, AT_SYMLINK_NOFOLLOW, AT_FDCWD, uap->fname, UIO_USERSPACE, uap->fhp)); } #ifndef _SYS_SYSPROTO_H_ struct getfh_args { char *fname; fhandle_t *fhp; }; #endif int sys_getfh(struct thread *td, struct getfh_args *uap) { return (kern_getfhat(td, 0, AT_FDCWD, uap->fname, UIO_USERSPACE, uap->fhp)); } /* * syscall for the rpc.lockd to use to translate an open descriptor into * a NFS file handle. * * warning: do not remove the priv_check() call or this becomes one giant * security hole. */ #ifndef _SYS_SYSPROTO_H_ struct getfhat_args { int fd; char *path; fhandle_t *fhp; int flags; }; #endif int sys_getfhat(struct thread *td, struct getfhat_args *uap) { if ((uap->flags & ~(AT_SYMLINK_NOFOLLOW | AT_BENEATH)) != 0) return (EINVAL); return (kern_getfhat(td, uap->flags, uap->fd, uap->path, UIO_USERSPACE, uap->fhp)); } static int kern_getfhat(struct thread *td, int flags, int fd, const char *path, enum uio_seg pathseg, fhandle_t *fhp) { struct nameidata nd; fhandle_t fh; struct vnode *vp; int error; error = priv_check(td, PRIV_VFS_GETFH); if (error != 0) return (error); NDINIT_AT(&nd, LOOKUP, ((flags & AT_SYMLINK_NOFOLLOW) != 0 ? NOFOLLOW : FOLLOW) | ((flags & AT_BENEATH) != 0 ? BENEATH : 0) | LOCKLEAF | AUDITVNODE1, pathseg, path, fd, td); error = namei(&nd); if (error != 0) return (error); NDFREE(&nd, NDF_ONLY_PNBUF); vp = nd.ni_vp; bzero(&fh, sizeof(fh)); fh.fh_fsid = vp->v_mount->mnt_stat.f_fsid; error = VOP_VPTOFH(vp, &fh.fh_fid); vput(vp); if (error == 0) error = copyout(&fh, fhp, sizeof (fh)); return (error); } #ifndef _SYS_SYSPROTO_H_ struct fhlink_args { fhandle_t *fhp; const char *to; }; #endif int sys_fhlink(struct thread *td, struct fhlink_args *uap) { return (kern_fhlinkat(td, AT_FDCWD, uap->to, UIO_USERSPACE, uap->fhp)); } #ifndef _SYS_SYSPROTO_H_ struct fhlinkat_args { fhandle_t *fhp; int tofd; const char *to; }; #endif int sys_fhlinkat(struct thread *td, struct fhlinkat_args *uap) { return (kern_fhlinkat(td, uap->tofd, uap->to, UIO_USERSPACE, uap->fhp)); } static int kern_fhlinkat(struct thread *td, int fd, const char *path, enum uio_seg pathseg, fhandle_t *fhp) { fhandle_t fh; struct mount *mp; struct vnode *vp; int error; error = priv_check(td, PRIV_VFS_GETFH); if (error != 0) return (error); error = copyin(fhp, &fh, sizeof(fh)); if (error != 0) return (error); do { bwillwrite(); if ((mp = vfs_busyfs(&fh.fh_fsid)) == NULL) return (ESTALE); error = VFS_FHTOVP(mp, &fh.fh_fid, LK_SHARED, &vp); vfs_unbusy(mp); if (error != 0) return (error); VOP_UNLOCK(vp); } while ((error = kern_linkat_vp(td, vp, fd, path, pathseg)) == EAGAIN); return (error); } #ifndef _SYS_SYSPROTO_H_ struct fhreadlink_args { fhandle_t *fhp; char *buf; size_t bufsize; }; #endif int sys_fhreadlink(struct thread *td, struct fhreadlink_args *uap) { fhandle_t fh; struct mount *mp; struct vnode *vp; int error; error = priv_check(td, PRIV_VFS_GETFH); if (error != 0) return (error); if (uap->bufsize > IOSIZE_MAX) return (EINVAL); error = copyin(uap->fhp, &fh, sizeof(fh)); if (error != 0) return (error); if ((mp = vfs_busyfs(&fh.fh_fsid)) == NULL) return (ESTALE); error = VFS_FHTOVP(mp, &fh.fh_fid, LK_SHARED, &vp); vfs_unbusy(mp); if (error != 0) return (error); error = kern_readlink_vp(vp, uap->buf, UIO_USERSPACE, uap->bufsize, td); vput(vp); return (error); } /* * syscall for the rpc.lockd to use to translate a NFS file handle into an * open descriptor. * * warning: do not remove the priv_check() call or this becomes one giant * security hole. */ #ifndef _SYS_SYSPROTO_H_ struct fhopen_args { const struct fhandle *u_fhp; int flags; }; #endif int sys_fhopen(struct thread *td, struct fhopen_args *uap) { struct mount *mp; struct vnode *vp; struct fhandle fhp; struct file *fp; int fmode, error; int indx; error = priv_check(td, PRIV_VFS_FHOPEN); if (error != 0) return (error); indx = -1; fmode = FFLAGS(uap->flags); /* why not allow a non-read/write open for our lockd? */ if (((fmode & (FREAD | FWRITE)) == 0) || (fmode & O_CREAT)) return (EINVAL); error = copyin(uap->u_fhp, &fhp, sizeof(fhp)); if (error != 0) return(error); /* find the mount point */ mp = vfs_busyfs(&fhp.fh_fsid); if (mp == NULL) return (ESTALE); /* now give me my vnode, it gets returned to me locked */ error = VFS_FHTOVP(mp, &fhp.fh_fid, LK_EXCLUSIVE, &vp); vfs_unbusy(mp); if (error != 0) return (error); error = falloc_noinstall(td, &fp); if (error != 0) { vput(vp); return (error); } /* * An extra reference on `fp' has been held for us by * falloc_noinstall(). */ #ifdef INVARIANTS td->td_dupfd = -1; #endif error = vn_open_vnode(vp, fmode, td->td_ucred, td, fp); if (error != 0) { KASSERT(fp->f_ops == &badfileops, ("VOP_OPEN in fhopen() set f_ops")); KASSERT(td->td_dupfd < 0, ("fhopen() encountered fdopen()")); vput(vp); goto bad; } #ifdef INVARIANTS td->td_dupfd = 0; #endif fp->f_vnode = vp; fp->f_seqcount[UIO_READ] = 1; fp->f_seqcount[UIO_WRITE] = 1; finit(fp, (fmode & FMASK) | (fp->f_flag & FHASLOCK), DTYPE_VNODE, vp, &vnops); VOP_UNLOCK(vp); if ((fmode & O_TRUNC) != 0) { error = fo_truncate(fp, 0, td->td_ucred, td); if (error != 0) goto bad; } error = finstall(td, fp, &indx, fmode, NULL); bad: fdrop(fp, td); td->td_retval[0] = indx; return (error); } /* * Stat an (NFS) file handle. */ #ifndef _SYS_SYSPROTO_H_ struct fhstat_args { struct fhandle *u_fhp; struct stat *sb; }; #endif int sys_fhstat(struct thread *td, struct fhstat_args *uap) { struct stat sb; struct fhandle fh; int error; error = copyin(uap->u_fhp, &fh, sizeof(fh)); if (error != 0) return (error); error = kern_fhstat(td, fh, &sb); if (error == 0) error = copyout(&sb, uap->sb, sizeof(sb)); return (error); } int kern_fhstat(struct thread *td, struct fhandle fh, struct stat *sb) { struct mount *mp; struct vnode *vp; int error; error = priv_check(td, PRIV_VFS_FHSTAT); if (error != 0) return (error); if ((mp = vfs_busyfs(&fh.fh_fsid)) == NULL) return (ESTALE); error = VFS_FHTOVP(mp, &fh.fh_fid, LK_EXCLUSIVE, &vp); vfs_unbusy(mp); if (error != 0) return (error); - error = vn_stat(vp, sb, td->td_ucred, NOCRED, td); + error = VOP_STAT(vp, sb, td->td_ucred, NOCRED, td); vput(vp); return (error); } /* * Implement fstatfs() for (NFS) file handles. */ #ifndef _SYS_SYSPROTO_H_ struct fhstatfs_args { struct fhandle *u_fhp; struct statfs *buf; }; #endif int sys_fhstatfs(struct thread *td, struct fhstatfs_args *uap) { struct statfs *sfp; fhandle_t fh; int error; error = copyin(uap->u_fhp, &fh, sizeof(fhandle_t)); if (error != 0) return (error); sfp = malloc(sizeof(struct statfs), M_STATFS, M_WAITOK); error = kern_fhstatfs(td, fh, sfp); if (error == 0) error = copyout(sfp, uap->buf, sizeof(*sfp)); free(sfp, M_STATFS); return (error); } int kern_fhstatfs(struct thread *td, fhandle_t fh, struct statfs *buf) { struct mount *mp; struct vnode *vp; int error; error = priv_check(td, PRIV_VFS_FHSTATFS); if (error != 0) return (error); if ((mp = vfs_busyfs(&fh.fh_fsid)) == NULL) return (ESTALE); error = VFS_FHTOVP(mp, &fh.fh_fid, LK_EXCLUSIVE, &vp); if (error != 0) { vfs_unbusy(mp); return (error); } vput(vp); error = prison_canseemount(td->td_ucred, mp); if (error != 0) goto out; #ifdef MAC error = mac_mount_check_stat(td->td_ucred, mp); if (error != 0) goto out; #endif error = VFS_STATFS(mp, buf); out: vfs_unbusy(mp); return (error); } /* * Unlike madvise(2), we do not make a best effort to remember every * possible caching hint. Instead, we remember the last setting with * the exception that we will allow POSIX_FADV_NORMAL to adjust the * region of any current setting. */ int kern_posix_fadvise(struct thread *td, int fd, off_t offset, off_t len, int advice) { struct fadvise_info *fa, *new; struct file *fp; struct vnode *vp; off_t end; int error; if (offset < 0 || len < 0 || offset > OFF_MAX - len) return (EINVAL); AUDIT_ARG_VALUE(advice); switch (advice) { case POSIX_FADV_SEQUENTIAL: case POSIX_FADV_RANDOM: case POSIX_FADV_NOREUSE: new = malloc(sizeof(*fa), M_FADVISE, M_WAITOK); break; case POSIX_FADV_NORMAL: case POSIX_FADV_WILLNEED: case POSIX_FADV_DONTNEED: new = NULL; break; default: return (EINVAL); } /* XXX: CAP_POSIX_FADVISE? */ AUDIT_ARG_FD(fd); error = fget(td, fd, &cap_no_rights, &fp); if (error != 0) goto out; AUDIT_ARG_FILE(td->td_proc, fp); if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) { error = ESPIPE; goto out; } if (fp->f_type != DTYPE_VNODE) { error = ENODEV; goto out; } vp = fp->f_vnode; if (vp->v_type != VREG) { error = ENODEV; goto out; } if (len == 0) end = OFF_MAX; else end = offset + len - 1; switch (advice) { case POSIX_FADV_SEQUENTIAL: case POSIX_FADV_RANDOM: case POSIX_FADV_NOREUSE: /* * Try to merge any existing non-standard region with * this new region if possible, otherwise create a new * non-standard region for this request. */ mtx_pool_lock(mtxpool_sleep, fp); fa = fp->f_advice; if (fa != NULL && fa->fa_advice == advice && ((fa->fa_start <= end && fa->fa_end >= offset) || (end != OFF_MAX && fa->fa_start == end + 1) || (fa->fa_end != OFF_MAX && fa->fa_end + 1 == offset))) { if (offset < fa->fa_start) fa->fa_start = offset; if (end > fa->fa_end) fa->fa_end = end; } else { new->fa_advice = advice; new->fa_start = offset; new->fa_end = end; fp->f_advice = new; new = fa; } mtx_pool_unlock(mtxpool_sleep, fp); break; case POSIX_FADV_NORMAL: /* * If a the "normal" region overlaps with an existing * non-standard region, trim or remove the * non-standard region. */ mtx_pool_lock(mtxpool_sleep, fp); fa = fp->f_advice; if (fa != NULL) { if (offset <= fa->fa_start && end >= fa->fa_end) { new = fa; fp->f_advice = NULL; } else if (offset <= fa->fa_start && end >= fa->fa_start) fa->fa_start = end + 1; else if (offset <= fa->fa_end && end >= fa->fa_end) fa->fa_end = offset - 1; else if (offset >= fa->fa_start && end <= fa->fa_end) { /* * If the "normal" region is a middle * portion of the existing * non-standard region, just remove * the whole thing rather than picking * one side or the other to * preserve. */ new = fa; fp->f_advice = NULL; } } mtx_pool_unlock(mtxpool_sleep, fp); break; case POSIX_FADV_WILLNEED: case POSIX_FADV_DONTNEED: error = VOP_ADVISE(vp, offset, end, advice); break; } out: if (fp != NULL) fdrop(fp, td); free(new, M_FADVISE); return (error); } int sys_posix_fadvise(struct thread *td, struct posix_fadvise_args *uap) { int error; error = kern_posix_fadvise(td, uap->fd, uap->offset, uap->len, uap->advice); return (kern_posix_error(td, error)); } int kern_copy_file_range(struct thread *td, int infd, off_t *inoffp, int outfd, off_t *outoffp, size_t len, unsigned int flags) { struct file *infp, *outfp; struct vnode *invp, *outvp; int error; size_t retlen; void *rl_rcookie, *rl_wcookie; off_t savinoff, savoutoff; infp = outfp = NULL; rl_rcookie = rl_wcookie = NULL; savinoff = -1; error = 0; retlen = 0; if (flags != 0) { error = EINVAL; goto out; } if (len > SSIZE_MAX) /* * Although the len argument is size_t, the return argument * is ssize_t (which is signed). Therefore a size that won't * fit in ssize_t can't be returned. */ len = SSIZE_MAX; /* Get the file structures for the file descriptors. */ error = fget_read(td, infd, &cap_read_rights, &infp); if (error != 0) goto out; if (infp->f_ops == &badfileops) { error = EBADF; goto out; } if (infp->f_vnode == NULL) { error = EINVAL; goto out; } error = fget_write(td, outfd, &cap_write_rights, &outfp); if (error != 0) goto out; if (outfp->f_ops == &badfileops) { error = EBADF; goto out; } if (outfp->f_vnode == NULL) { error = EINVAL; goto out; } /* Set the offset pointers to the correct place. */ if (inoffp == NULL) inoffp = &infp->f_offset; if (outoffp == NULL) outoffp = &outfp->f_offset; savinoff = *inoffp; savoutoff = *outoffp; invp = infp->f_vnode; outvp = outfp->f_vnode; /* Sanity check the f_flag bits. */ if ((outfp->f_flag & (FWRITE | FAPPEND)) != FWRITE || (infp->f_flag & FREAD) == 0) { error = EBADF; goto out; } /* If len == 0, just return 0. */ if (len == 0) goto out; /* * If infp and outfp refer to the same file, the byte ranges cannot * overlap. */ if (invp == outvp && ((savinoff <= savoutoff && savinoff + len > savoutoff) || (savinoff > savoutoff && savoutoff + len > savinoff))) { error = EINVAL; goto out; } /* Range lock the byte ranges for both invp and outvp. */ for (;;) { rl_wcookie = vn_rangelock_wlock(outvp, *outoffp, *outoffp + len); rl_rcookie = vn_rangelock_tryrlock(invp, *inoffp, *inoffp + len); if (rl_rcookie != NULL) break; vn_rangelock_unlock(outvp, rl_wcookie); rl_rcookie = vn_rangelock_rlock(invp, *inoffp, *inoffp + len); vn_rangelock_unlock(invp, rl_rcookie); } retlen = len; error = vn_copy_file_range(invp, inoffp, outvp, outoffp, &retlen, flags, infp->f_cred, outfp->f_cred, td); out: if (rl_rcookie != NULL) vn_rangelock_unlock(invp, rl_rcookie); if (rl_wcookie != NULL) vn_rangelock_unlock(outvp, rl_wcookie); if (savinoff != -1 && (error == EINTR || error == ERESTART)) { *inoffp = savinoff; *outoffp = savoutoff; } if (outfp != NULL) fdrop(outfp, td); if (infp != NULL) fdrop(infp, td); td->td_retval[0] = retlen; return (error); } int sys_copy_file_range(struct thread *td, struct copy_file_range_args *uap) { off_t inoff, outoff, *inoffp, *outoffp; int error; inoffp = outoffp = NULL; if (uap->inoffp != NULL) { error = copyin(uap->inoffp, &inoff, sizeof(off_t)); if (error != 0) return (error); inoffp = &inoff; } if (uap->outoffp != NULL) { error = copyin(uap->outoffp, &outoff, sizeof(off_t)); if (error != 0) return (error); outoffp = &outoff; } error = kern_copy_file_range(td, uap->infd, inoffp, uap->outfd, outoffp, uap->len, uap->flags); if (error == 0 && uap->inoffp != NULL) error = copyout(inoffp, uap->inoffp, sizeof(off_t)); if (error == 0 && uap->outoffp != NULL) error = copyout(outoffp, uap->outoffp, sizeof(off_t)); return (error); } diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c index eb1a7c28ddfe..a0dd9fd2436b 100644 --- a/sys/kern/vfs_vnops.c +++ b/sys/kern/vfs_vnops.c @@ -1,3273 +1,3162 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * Copyright (c) 2012 Konstantin Belousov * Copyright (c) 2013, 2014 The FreeBSD Foundation * * Portions of this software were developed by Konstantin Belousov * under sponsorship from the FreeBSD Foundation. * * 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. * * @(#)vfs_vnops.c 8.2 (Berkeley) 1/21/94 */ #include __FBSDID("$FreeBSD$"); #include "opt_hwpmc_hooks.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HWPMC_HOOKS #include #endif static fo_rdwr_t vn_read; static fo_rdwr_t vn_write; static fo_rdwr_t vn_io_fault; static fo_truncate_t vn_truncate; static fo_ioctl_t vn_ioctl; static fo_poll_t vn_poll; static fo_kqfilter_t vn_kqfilter; static fo_stat_t vn_statfile; static fo_close_t vn_closefile; static fo_mmap_t vn_mmap; static fo_fallocate_t vn_fallocate; struct fileops vnops = { .fo_read = vn_io_fault, .fo_write = vn_io_fault, .fo_truncate = vn_truncate, .fo_ioctl = vn_ioctl, .fo_poll = vn_poll, .fo_kqfilter = vn_kqfilter, .fo_stat = vn_statfile, .fo_close = vn_closefile, .fo_chmod = vn_chmod, .fo_chown = vn_chown, .fo_sendfile = vn_sendfile, .fo_seek = vn_seek, .fo_fill_kinfo = vn_fill_kinfo, .fo_mmap = vn_mmap, .fo_fallocate = vn_fallocate, .fo_flags = DFLAG_PASSABLE | DFLAG_SEEKABLE }; static const int io_hold_cnt = 16; static int vn_io_fault_enable = 1; SYSCTL_INT(_debug, OID_AUTO, vn_io_fault_enable, CTLFLAG_RW, &vn_io_fault_enable, 0, "Enable vn_io_fault lock avoidance"); static int vn_io_fault_prefault = 0; SYSCTL_INT(_debug, OID_AUTO, vn_io_fault_prefault, CTLFLAG_RW, &vn_io_fault_prefault, 0, "Enable vn_io_fault prefaulting"); static u_long vn_io_faults_cnt; SYSCTL_ULONG(_debug, OID_AUTO, vn_io_faults, CTLFLAG_RD, &vn_io_faults_cnt, 0, "Count of vn_io_fault lock avoidance triggers"); static int vfs_allow_read_dir = 0; SYSCTL_INT(_security_bsd, OID_AUTO, allow_read_dir, CTLFLAG_RW, &vfs_allow_read_dir, 0, "Enable read(2) of directory by root for filesystems that support it"); /* * Returns true if vn_io_fault mode of handling the i/o request should * be used. */ static bool do_vn_io_fault(struct vnode *vp, struct uio *uio) { struct mount *mp; return (uio->uio_segflg == UIO_USERSPACE && vp->v_type == VREG && (mp = vp->v_mount) != NULL && (mp->mnt_kern_flag & MNTK_NO_IOPF) != 0 && vn_io_fault_enable); } /* * Structure used to pass arguments to vn_io_fault1(), to do either * file- or vnode-based I/O calls. */ struct vn_io_fault_args { enum { VN_IO_FAULT_FOP, VN_IO_FAULT_VOP } kind; struct ucred *cred; int flags; union { struct fop_args_tag { struct file *fp; fo_rdwr_t *doio; } fop_args; struct vop_args_tag { struct vnode *vp; } vop_args; } args; }; static int vn_io_fault1(struct vnode *vp, struct uio *uio, struct vn_io_fault_args *args, struct thread *td); int vn_open(struct nameidata *ndp, int *flagp, int cmode, struct file *fp) { struct thread *td = ndp->ni_cnd.cn_thread; return (vn_open_cred(ndp, flagp, cmode, 0, td->td_ucred, fp)); } /* * Common code for vnode open operations via a name lookup. * Lookup the vnode and invoke VOP_CREATE if needed. * Check permissions, and call the VOP_OPEN or VOP_CREATE routine. * * Note that this does NOT free nameidata for the successful case, * due to the NDINIT being done elsewhere. */ int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, u_int vn_open_flags, struct ucred *cred, struct file *fp) { struct vnode *vp; struct mount *mp; struct thread *td = ndp->ni_cnd.cn_thread; struct vattr vat; struct vattr *vap = &vat; int fmode, error; restart: fmode = *flagp; if ((fmode & (O_CREAT | O_EXCL | O_DIRECTORY)) == (O_CREAT | O_EXCL | O_DIRECTORY)) return (EINVAL); else if ((fmode & (O_CREAT | O_DIRECTORY)) == O_CREAT) { ndp->ni_cnd.cn_nameiop = CREATE; /* * Set NOCACHE to avoid flushing the cache when * rolling in many files at once. */ ndp->ni_cnd.cn_flags = ISOPEN | LOCKPARENT | LOCKLEAF | NOCACHE; if ((fmode & O_EXCL) == 0 && (fmode & O_NOFOLLOW) == 0) ndp->ni_cnd.cn_flags |= FOLLOW; if ((fmode & O_BENEATH) != 0) ndp->ni_cnd.cn_flags |= BENEATH; if (!(vn_open_flags & VN_OPEN_NOAUDIT)) ndp->ni_cnd.cn_flags |= AUDITVNODE1; if (vn_open_flags & VN_OPEN_NOCAPCHECK) ndp->ni_cnd.cn_flags |= NOCAPCHECK; if ((vn_open_flags & VN_OPEN_INVFS) == 0) bwillwrite(); if ((error = namei(ndp)) != 0) return (error); if (ndp->ni_vp == NULL) { VATTR_NULL(vap); vap->va_type = VREG; vap->va_mode = cmode; if (fmode & O_EXCL) vap->va_vaflags |= VA_EXCLUSIVE; if (vn_start_write(ndp->ni_dvp, &mp, V_NOWAIT) != 0) { NDFREE(ndp, NDF_ONLY_PNBUF); vput(ndp->ni_dvp); if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0) return (error); goto restart; } if ((vn_open_flags & VN_OPEN_NAMECACHE) != 0) ndp->ni_cnd.cn_flags |= MAKEENTRY; #ifdef MAC error = mac_vnode_check_create(cred, ndp->ni_dvp, &ndp->ni_cnd, vap); if (error == 0) #endif error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, &ndp->ni_cnd, vap); vput(ndp->ni_dvp); vn_finished_write(mp); if (error) { NDFREE(ndp, NDF_ONLY_PNBUF); return (error); } fmode &= ~O_TRUNC; vp = ndp->ni_vp; } else { if (ndp->ni_dvp == ndp->ni_vp) vrele(ndp->ni_dvp); else vput(ndp->ni_dvp); ndp->ni_dvp = NULL; vp = ndp->ni_vp; if (fmode & O_EXCL) { error = EEXIST; goto bad; } if (vp->v_type == VDIR) { error = EISDIR; goto bad; } fmode &= ~O_CREAT; } } else { ndp->ni_cnd.cn_nameiop = LOOKUP; ndp->ni_cnd.cn_flags = ISOPEN | ((fmode & O_NOFOLLOW) ? NOFOLLOW : FOLLOW) | LOCKLEAF; if (!(fmode & FWRITE)) ndp->ni_cnd.cn_flags |= LOCKSHARED; if ((fmode & O_BENEATH) != 0) ndp->ni_cnd.cn_flags |= BENEATH; if (!(vn_open_flags & VN_OPEN_NOAUDIT)) ndp->ni_cnd.cn_flags |= AUDITVNODE1; if (vn_open_flags & VN_OPEN_NOCAPCHECK) ndp->ni_cnd.cn_flags |= NOCAPCHECK; if ((error = namei(ndp)) != 0) return (error); vp = ndp->ni_vp; } error = vn_open_vnode(vp, fmode, cred, td, fp); if (error) goto bad; *flagp = fmode; return (0); bad: NDFREE(ndp, NDF_ONLY_PNBUF); vput(vp); *flagp = fmode; ndp->ni_vp = NULL; return (error); } static int vn_open_vnode_advlock(struct vnode *vp, int fmode, struct file *fp) { struct flock lf; int error, lock_flags, type; ASSERT_VOP_LOCKED(vp, "vn_open_vnode_advlock"); if ((fmode & (O_EXLOCK | O_SHLOCK)) == 0) return (0); KASSERT(fp != NULL, ("open with flock requires fp")); if (fp->f_type != DTYPE_NONE && fp->f_type != DTYPE_VNODE) return (EOPNOTSUPP); lock_flags = VOP_ISLOCKED(vp); VOP_UNLOCK(vp); lf.l_whence = SEEK_SET; lf.l_start = 0; lf.l_len = 0; lf.l_type = (fmode & O_EXLOCK) != 0 ? F_WRLCK : F_RDLCK; type = F_FLOCK; if ((fmode & FNONBLOCK) == 0) type |= F_WAIT; error = VOP_ADVLOCK(vp, (caddr_t)fp, F_SETLK, &lf, type); if (error == 0) fp->f_flag |= FHASLOCK; vn_lock(vp, lock_flags | LK_RETRY); if (error == 0 && VN_IS_DOOMED(vp)) error = ENOENT; return (error); } /* * Common code for vnode open operations once a vnode is located. * Check permissions, and call the VOP_OPEN routine. */ int vn_open_vnode(struct vnode *vp, int fmode, struct ucred *cred, struct thread *td, struct file *fp) { accmode_t accmode; int error; if (vp->v_type == VLNK) return (EMLINK); if (vp->v_type == VSOCK) return (EOPNOTSUPP); if (vp->v_type != VDIR && fmode & O_DIRECTORY) return (ENOTDIR); accmode = 0; if (fmode & (FWRITE | O_TRUNC)) { if (vp->v_type == VDIR) return (EISDIR); accmode |= VWRITE; } if (fmode & FREAD) accmode |= VREAD; if (fmode & FEXEC) accmode |= VEXEC; if ((fmode & O_APPEND) && (fmode & FWRITE)) accmode |= VAPPEND; #ifdef MAC if (fmode & O_CREAT) accmode |= VCREAT; if (fmode & O_VERIFY) accmode |= VVERIFY; error = mac_vnode_check_open(cred, vp, accmode); if (error) return (error); accmode &= ~(VCREAT | VVERIFY); #endif if ((fmode & O_CREAT) == 0 && accmode != 0) { error = VOP_ACCESS(vp, accmode, cred, td); if (error != 0) return (error); } if (vp->v_type == VFIFO && VOP_ISLOCKED(vp) != LK_EXCLUSIVE) vn_lock(vp, LK_UPGRADE | LK_RETRY); error = VOP_OPEN(vp, fmode, cred, td, fp); if (error != 0) return (error); error = vn_open_vnode_advlock(vp, fmode, fp); if (error == 0 && (fmode & FWRITE) != 0) { error = VOP_ADD_WRITECOUNT(vp, 1); if (error == 0) { CTR3(KTR_VFS, "%s: vp %p v_writecount increased to %d", __func__, vp, vp->v_writecount); } } /* * Error from advlock or VOP_ADD_WRITECOUNT() still requires * calling VOP_CLOSE() to pair with earlier VOP_OPEN(). * Arrange for that by having fdrop() to use vn_closefile(). */ if (error != 0) { fp->f_flag |= FOPENFAILED; fp->f_vnode = vp; if (fp->f_ops == &badfileops) { fp->f_type = DTYPE_VNODE; fp->f_ops = &vnops; } vref(vp); } ASSERT_VOP_LOCKED(vp, "vn_open_vnode"); return (error); } /* * Check for write permissions on the specified vnode. * Prototype text segments cannot be written. * It is racy. */ int vn_writechk(struct vnode *vp) { ASSERT_VOP_LOCKED(vp, "vn_writechk"); /* * If there's shared text associated with * the vnode, try to free it up once. If * we fail, we can't allow writing. */ if (VOP_IS_TEXT(vp)) return (ETXTBSY); return (0); } /* * Vnode close call */ static int vn_close1(struct vnode *vp, int flags, struct ucred *file_cred, struct thread *td, bool keep_ref) { struct mount *mp; int error, lock_flags; if (vp->v_type != VFIFO && (flags & FWRITE) == 0 && MNT_EXTENDED_SHARED(vp->v_mount)) lock_flags = LK_SHARED; else lock_flags = LK_EXCLUSIVE; vn_start_write(vp, &mp, V_WAIT); vn_lock(vp, lock_flags | LK_RETRY); AUDIT_ARG_VNODE1(vp); if ((flags & (FWRITE | FOPENFAILED)) == FWRITE) { VOP_ADD_WRITECOUNT_CHECKED(vp, -1); CTR3(KTR_VFS, "%s: vp %p v_writecount decreased to %d", __func__, vp, vp->v_writecount); } error = VOP_CLOSE(vp, flags, file_cred, td); if (keep_ref) VOP_UNLOCK(vp); else vput(vp); vn_finished_write(mp); return (error); } int vn_close(struct vnode *vp, int flags, struct ucred *file_cred, struct thread *td) { return (vn_close1(vp, flags, file_cred, td, false)); } /* * Heuristic to detect sequential operation. */ static int sequential_heuristic(struct uio *uio, struct file *fp) { enum uio_rw rw; ASSERT_VOP_LOCKED(fp->f_vnode, __func__); rw = uio->uio_rw; if (fp->f_flag & FRDAHEAD) return (fp->f_seqcount[rw] << IO_SEQSHIFT); /* * Offset 0 is handled specially. open() sets f_seqcount to 1 so * that the first I/O is normally considered to be slightly * sequential. Seeking to offset 0 doesn't change sequentiality * unless previous seeks have reduced f_seqcount to 0, in which * case offset 0 is not special. */ if ((uio->uio_offset == 0 && fp->f_seqcount[rw] > 0) || uio->uio_offset == fp->f_nextoff[rw]) { /* * f_seqcount is in units of fixed-size blocks so that it * depends mainly on the amount of sequential I/O and not * much on the number of sequential I/O's. The fixed size * of 16384 is hard-coded here since it is (not quite) just * a magic size that works well here. This size is more * closely related to the best I/O size for real disks than * to any block size used by software. */ if (uio->uio_resid >= IO_SEQMAX * 16384) fp->f_seqcount[rw] = IO_SEQMAX; else { fp->f_seqcount[rw] += howmany(uio->uio_resid, 16384); if (fp->f_seqcount[rw] > IO_SEQMAX) fp->f_seqcount[rw] = IO_SEQMAX; } return (fp->f_seqcount[rw] << IO_SEQSHIFT); } /* Not sequential. Quickly draw-down sequentiality. */ if (fp->f_seqcount[rw] > 1) fp->f_seqcount[rw] = 1; else fp->f_seqcount[rw] = 0; return (0); } /* * Package up an I/O request on a vnode into a uio and do it. */ int vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base, int len, off_t offset, enum uio_seg segflg, int ioflg, struct ucred *active_cred, struct ucred *file_cred, ssize_t *aresid, struct thread *td) { struct uio auio; struct iovec aiov; struct mount *mp; struct ucred *cred; void *rl_cookie; struct vn_io_fault_args args; int error, lock_flags; if (offset < 0 && vp->v_type != VCHR) return (EINVAL); auio.uio_iov = &aiov; auio.uio_iovcnt = 1; aiov.iov_base = base; aiov.iov_len = len; auio.uio_resid = len; auio.uio_offset = offset; auio.uio_segflg = segflg; auio.uio_rw = rw; auio.uio_td = td; error = 0; if ((ioflg & IO_NODELOCKED) == 0) { if ((ioflg & IO_RANGELOCKED) == 0) { if (rw == UIO_READ) { rl_cookie = vn_rangelock_rlock(vp, offset, offset + len); } else { rl_cookie = vn_rangelock_wlock(vp, offset, offset + len); } } else rl_cookie = NULL; mp = NULL; if (rw == UIO_WRITE) { if (vp->v_type != VCHR && (error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) goto out; if (MNT_SHARED_WRITES(mp) || ((mp == NULL) && MNT_SHARED_WRITES(vp->v_mount))) lock_flags = LK_SHARED; else lock_flags = LK_EXCLUSIVE; } else lock_flags = LK_SHARED; vn_lock(vp, lock_flags | LK_RETRY); } else rl_cookie = NULL; ASSERT_VOP_LOCKED(vp, "IO_NODELOCKED with no vp lock held"); #ifdef MAC if ((ioflg & IO_NOMACCHECK) == 0) { if (rw == UIO_READ) error = mac_vnode_check_read(active_cred, file_cred, vp); else error = mac_vnode_check_write(active_cred, file_cred, vp); } #endif if (error == 0) { if (file_cred != NULL) cred = file_cred; else cred = active_cred; if (do_vn_io_fault(vp, &auio)) { args.kind = VN_IO_FAULT_VOP; args.cred = cred; args.flags = ioflg; args.args.vop_args.vp = vp; error = vn_io_fault1(vp, &auio, &args, td); } else if (rw == UIO_READ) { error = VOP_READ(vp, &auio, ioflg, cred); } else /* if (rw == UIO_WRITE) */ { error = VOP_WRITE(vp, &auio, ioflg, cred); } } if (aresid) *aresid = auio.uio_resid; else if (auio.uio_resid && error == 0) error = EIO; if ((ioflg & IO_NODELOCKED) == 0) { VOP_UNLOCK(vp); if (mp != NULL) vn_finished_write(mp); } out: if (rl_cookie != NULL) vn_rangelock_unlock(vp, rl_cookie); return (error); } /* * Package up an I/O request on a vnode into a uio and do it. The I/O * request is split up into smaller chunks and we try to avoid saturating * the buffer cache while potentially holding a vnode locked, so we * check bwillwrite() before calling vn_rdwr(). We also call kern_yield() * to give other processes a chance to lock the vnode (either other processes * core'ing the same binary, or unrelated processes scanning the directory). */ int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, void *base, size_t len, off_t offset, enum uio_seg segflg, int ioflg, struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, struct thread *td) { int error = 0; ssize_t iaresid; do { int chunk; /* * Force `offset' to a multiple of MAXBSIZE except possibly * for the first chunk, so that filesystems only need to * write full blocks except possibly for the first and last * chunks. */ chunk = MAXBSIZE - (uoff_t)offset % MAXBSIZE; if (chunk > len) chunk = len; if (rw != UIO_READ && vp->v_type == VREG) bwillwrite(); iaresid = 0; error = vn_rdwr(rw, vp, base, chunk, offset, segflg, ioflg, active_cred, file_cred, &iaresid, td); len -= chunk; /* aresid calc already includes length */ if (error) break; offset += chunk; base = (char *)base + chunk; kern_yield(PRI_USER); } while (len); if (aresid) *aresid = len + iaresid; return (error); } #if OFF_MAX <= LONG_MAX off_t foffset_lock(struct file *fp, int flags) { volatile short *flagsp; off_t res; short state; KASSERT((flags & FOF_OFFSET) == 0, ("FOF_OFFSET passed")); if ((flags & FOF_NOLOCK) != 0) return (atomic_load_long(&fp->f_offset)); /* * According to McKusick the vn lock was protecting f_offset here. * It is now protected by the FOFFSET_LOCKED flag. */ flagsp = &fp->f_vnread_flags; if (atomic_cmpset_acq_16(flagsp, 0, FOFFSET_LOCKED)) return (atomic_load_long(&fp->f_offset)); sleepq_lock(&fp->f_vnread_flags); state = atomic_load_16(flagsp); for (;;) { if ((state & FOFFSET_LOCKED) == 0) { if (!atomic_fcmpset_acq_16(flagsp, &state, FOFFSET_LOCKED)) continue; break; } if ((state & FOFFSET_LOCK_WAITING) == 0) { if (!atomic_fcmpset_acq_16(flagsp, &state, state | FOFFSET_LOCK_WAITING)) continue; } DROP_GIANT(); sleepq_add(&fp->f_vnread_flags, NULL, "vofflock", 0, 0); sleepq_wait(&fp->f_vnread_flags, PUSER -1); PICKUP_GIANT(); sleepq_lock(&fp->f_vnread_flags); state = atomic_load_16(flagsp); } res = atomic_load_long(&fp->f_offset); sleepq_release(&fp->f_vnread_flags); return (res); } void foffset_unlock(struct file *fp, off_t val, int flags) { volatile short *flagsp; short state; KASSERT((flags & FOF_OFFSET) == 0, ("FOF_OFFSET passed")); if ((flags & FOF_NOUPDATE) == 0) atomic_store_long(&fp->f_offset, val); if ((flags & FOF_NEXTOFF_R) != 0) fp->f_nextoff[UIO_READ] = val; if ((flags & FOF_NEXTOFF_W) != 0) fp->f_nextoff[UIO_WRITE] = val; if ((flags & FOF_NOLOCK) != 0) return; flagsp = &fp->f_vnread_flags; state = atomic_load_16(flagsp); if ((state & FOFFSET_LOCK_WAITING) == 0 && atomic_cmpset_rel_16(flagsp, state, 0)) return; sleepq_lock(&fp->f_vnread_flags); MPASS((fp->f_vnread_flags & FOFFSET_LOCKED) != 0); MPASS((fp->f_vnread_flags & FOFFSET_LOCK_WAITING) != 0); fp->f_vnread_flags = 0; sleepq_broadcast(&fp->f_vnread_flags, SLEEPQ_SLEEP, 0, 0); sleepq_release(&fp->f_vnread_flags); } #else off_t foffset_lock(struct file *fp, int flags) { struct mtx *mtxp; off_t res; KASSERT((flags & FOF_OFFSET) == 0, ("FOF_OFFSET passed")); mtxp = mtx_pool_find(mtxpool_sleep, fp); mtx_lock(mtxp); if ((flags & FOF_NOLOCK) == 0) { while (fp->f_vnread_flags & FOFFSET_LOCKED) { fp->f_vnread_flags |= FOFFSET_LOCK_WAITING; msleep(&fp->f_vnread_flags, mtxp, PUSER -1, "vofflock", 0); } fp->f_vnread_flags |= FOFFSET_LOCKED; } res = fp->f_offset; mtx_unlock(mtxp); return (res); } void foffset_unlock(struct file *fp, off_t val, int flags) { struct mtx *mtxp; KASSERT((flags & FOF_OFFSET) == 0, ("FOF_OFFSET passed")); mtxp = mtx_pool_find(mtxpool_sleep, fp); mtx_lock(mtxp); if ((flags & FOF_NOUPDATE) == 0) fp->f_offset = val; if ((flags & FOF_NEXTOFF_R) != 0) fp->f_nextoff[UIO_READ] = val; if ((flags & FOF_NEXTOFF_W) != 0) fp->f_nextoff[UIO_WRITE] = val; if ((flags & FOF_NOLOCK) == 0) { KASSERT((fp->f_vnread_flags & FOFFSET_LOCKED) != 0, ("Lost FOFFSET_LOCKED")); if (fp->f_vnread_flags & FOFFSET_LOCK_WAITING) wakeup(&fp->f_vnread_flags); fp->f_vnread_flags = 0; } mtx_unlock(mtxp); } #endif void foffset_lock_uio(struct file *fp, struct uio *uio, int flags) { if ((flags & FOF_OFFSET) == 0) uio->uio_offset = foffset_lock(fp, flags); } void foffset_unlock_uio(struct file *fp, struct uio *uio, int flags) { if ((flags & FOF_OFFSET) == 0) foffset_unlock(fp, uio->uio_offset, flags); } static int get_advice(struct file *fp, struct uio *uio) { struct mtx *mtxp; int ret; ret = POSIX_FADV_NORMAL; if (fp->f_advice == NULL || fp->f_vnode->v_type != VREG) return (ret); mtxp = mtx_pool_find(mtxpool_sleep, fp); mtx_lock(mtxp); if (fp->f_advice != NULL && uio->uio_offset >= fp->f_advice->fa_start && uio->uio_offset + uio->uio_resid <= fp->f_advice->fa_end) ret = fp->f_advice->fa_advice; mtx_unlock(mtxp); return (ret); } /* * File table vnode read routine. */ static int vn_read(struct file *fp, struct uio *uio, struct ucred *active_cred, int flags, struct thread *td) { struct vnode *vp; off_t orig_offset; int error, ioflag; int advice; KASSERT(uio->uio_td == td, ("uio_td %p is not td %p", uio->uio_td, td)); KASSERT(flags & FOF_OFFSET, ("No FOF_OFFSET")); vp = fp->f_vnode; ioflag = 0; if (fp->f_flag & FNONBLOCK) ioflag |= IO_NDELAY; if (fp->f_flag & O_DIRECT) ioflag |= IO_DIRECT; advice = get_advice(fp, uio); vn_lock(vp, LK_SHARED | LK_RETRY); switch (advice) { case POSIX_FADV_NORMAL: case POSIX_FADV_SEQUENTIAL: case POSIX_FADV_NOREUSE: ioflag |= sequential_heuristic(uio, fp); break; case POSIX_FADV_RANDOM: /* Disable read-ahead for random I/O. */ break; } orig_offset = uio->uio_offset; #ifdef MAC error = mac_vnode_check_read(active_cred, fp->f_cred, vp); if (error == 0) #endif error = VOP_READ(vp, uio, ioflag, fp->f_cred); fp->f_nextoff[UIO_READ] = uio->uio_offset; VOP_UNLOCK(vp); if (error == 0 && advice == POSIX_FADV_NOREUSE && orig_offset != uio->uio_offset) /* * Use POSIX_FADV_DONTNEED to flush pages and buffers * for the backing file after a POSIX_FADV_NOREUSE * read(2). */ error = VOP_ADVISE(vp, orig_offset, uio->uio_offset - 1, POSIX_FADV_DONTNEED); return (error); } /* * File table vnode write routine. */ static int vn_write(struct file *fp, struct uio *uio, struct ucred *active_cred, int flags, struct thread *td) { struct vnode *vp; struct mount *mp; off_t orig_offset; int error, ioflag, lock_flags; int advice; KASSERT(uio->uio_td == td, ("uio_td %p is not td %p", uio->uio_td, td)); KASSERT(flags & FOF_OFFSET, ("No FOF_OFFSET")); vp = fp->f_vnode; if (vp->v_type == VREG) bwillwrite(); ioflag = IO_UNIT; if (vp->v_type == VREG && (fp->f_flag & O_APPEND)) ioflag |= IO_APPEND; if (fp->f_flag & FNONBLOCK) ioflag |= IO_NDELAY; if (fp->f_flag & O_DIRECT) ioflag |= IO_DIRECT; if ((fp->f_flag & O_FSYNC) || (vp->v_mount && (vp->v_mount->mnt_flag & MNT_SYNCHRONOUS))) ioflag |= IO_SYNC; mp = NULL; if (vp->v_type != VCHR && (error = vn_start_write(vp, &mp, V_WAIT | PCATCH)) != 0) goto unlock; advice = get_advice(fp, uio); if (MNT_SHARED_WRITES(mp) || (mp == NULL && MNT_SHARED_WRITES(vp->v_mount))) { lock_flags = LK_SHARED; } else { lock_flags = LK_EXCLUSIVE; } vn_lock(vp, lock_flags | LK_RETRY); switch (advice) { case POSIX_FADV_NORMAL: case POSIX_FADV_SEQUENTIAL: case POSIX_FADV_NOREUSE: ioflag |= sequential_heuristic(uio, fp); break; case POSIX_FADV_RANDOM: /* XXX: Is this correct? */ break; } orig_offset = uio->uio_offset; #ifdef MAC error = mac_vnode_check_write(active_cred, fp->f_cred, vp); if (error == 0) #endif error = VOP_WRITE(vp, uio, ioflag, fp->f_cred); fp->f_nextoff[UIO_WRITE] = uio->uio_offset; VOP_UNLOCK(vp); if (vp->v_type != VCHR) vn_finished_write(mp); if (error == 0 && advice == POSIX_FADV_NOREUSE && orig_offset != uio->uio_offset) /* * Use POSIX_FADV_DONTNEED to flush pages and buffers * for the backing file after a POSIX_FADV_NOREUSE * write(2). */ error = VOP_ADVISE(vp, orig_offset, uio->uio_offset - 1, POSIX_FADV_DONTNEED); unlock: return (error); } /* * The vn_io_fault() is a wrapper around vn_read() and vn_write() to * prevent the following deadlock: * * Assume that the thread A reads from the vnode vp1 into userspace * buffer buf1 backed by the pages of vnode vp2. If a page in buf1 is * currently not resident, then system ends up with the call chain * vn_read() -> VOP_READ(vp1) -> uiomove() -> [Page Fault] -> * vm_fault(buf1) -> vnode_pager_getpages(vp2) -> VOP_GETPAGES(vp2) * which establishes lock order vp1->vn_lock, then vp2->vn_lock. * If, at the same time, thread B reads from vnode vp2 into buffer buf2 * backed by the pages of vnode vp1, and some page in buf2 is not * resident, we get a reversed order vp2->vn_lock, then vp1->vn_lock. * * To prevent the lock order reversal and deadlock, vn_io_fault() does * not allow page faults to happen during VOP_READ() or VOP_WRITE(). * Instead, it first tries to do the whole range i/o with pagefaults * disabled. If all pages in the i/o buffer are resident and mapped, * VOP will succeed (ignoring the genuine filesystem errors). * Otherwise, we get back EFAULT, and vn_io_fault() falls back to do * i/o in chunks, with all pages in the chunk prefaulted and held * using vm_fault_quick_hold_pages(). * * Filesystems using this deadlock avoidance scheme should use the * array of the held pages from uio, saved in the curthread->td_ma, * instead of doing uiomove(). A helper function * vn_io_fault_uiomove() converts uiomove request into * uiomove_fromphys() over td_ma array. * * Since vnode locks do not cover the whole i/o anymore, rangelocks * make the current i/o request atomic with respect to other i/os and * truncations. */ /* * Decode vn_io_fault_args and perform the corresponding i/o. */ static int vn_io_fault_doio(struct vn_io_fault_args *args, struct uio *uio, struct thread *td) { int error, save; error = 0; save = vm_fault_disable_pagefaults(); switch (args->kind) { case VN_IO_FAULT_FOP: error = (args->args.fop_args.doio)(args->args.fop_args.fp, uio, args->cred, args->flags, td); break; case VN_IO_FAULT_VOP: if (uio->uio_rw == UIO_READ) { error = VOP_READ(args->args.vop_args.vp, uio, args->flags, args->cred); } else if (uio->uio_rw == UIO_WRITE) { error = VOP_WRITE(args->args.vop_args.vp, uio, args->flags, args->cred); } break; default: panic("vn_io_fault_doio: unknown kind of io %d %d", args->kind, uio->uio_rw); } vm_fault_enable_pagefaults(save); return (error); } static int vn_io_fault_touch(char *base, const struct uio *uio) { int r; r = fubyte(base); if (r == -1 || (uio->uio_rw == UIO_READ && subyte(base, r) == -1)) return (EFAULT); return (0); } static int vn_io_fault_prefault_user(const struct uio *uio) { char *base; const struct iovec *iov; size_t len; ssize_t resid; int error, i; KASSERT(uio->uio_segflg == UIO_USERSPACE, ("vn_io_fault_prefault userspace")); error = i = 0; iov = uio->uio_iov; resid = uio->uio_resid; base = iov->iov_base; len = iov->iov_len; while (resid > 0) { error = vn_io_fault_touch(base, uio); if (error != 0) break; if (len < PAGE_SIZE) { if (len != 0) { error = vn_io_fault_touch(base + len - 1, uio); if (error != 0) break; resid -= len; } if (++i >= uio->uio_iovcnt) break; iov = uio->uio_iov + i; base = iov->iov_base; len = iov->iov_len; } else { len -= PAGE_SIZE; base += PAGE_SIZE; resid -= PAGE_SIZE; } } return (error); } /* * Common code for vn_io_fault(), agnostic to the kind of i/o request. * Uses vn_io_fault_doio() to make the call to an actual i/o function. * Used from vn_rdwr() and vn_io_fault(), which encode the i/o request * into args and call vn_io_fault1() to handle faults during the user * mode buffer accesses. */ static int vn_io_fault1(struct vnode *vp, struct uio *uio, struct vn_io_fault_args *args, struct thread *td) { vm_page_t ma[io_hold_cnt + 2]; struct uio *uio_clone, short_uio; struct iovec short_iovec[1]; vm_page_t *prev_td_ma; vm_prot_t prot; vm_offset_t addr, end; size_t len, resid; ssize_t adv; int error, cnt, saveheld, prev_td_ma_cnt; if (vn_io_fault_prefault) { error = vn_io_fault_prefault_user(uio); if (error != 0) return (error); /* Or ignore ? */ } prot = uio->uio_rw == UIO_READ ? VM_PROT_WRITE : VM_PROT_READ; /* * The UFS follows IO_UNIT directive and replays back both * uio_offset and uio_resid if an error is encountered during the * operation. But, since the iovec may be already advanced, * uio is still in an inconsistent state. * * Cache a copy of the original uio, which is advanced to the redo * point using UIO_NOCOPY below. */ uio_clone = cloneuio(uio); resid = uio->uio_resid; short_uio.uio_segflg = UIO_USERSPACE; short_uio.uio_rw = uio->uio_rw; short_uio.uio_td = uio->uio_td; error = vn_io_fault_doio(args, uio, td); if (error != EFAULT) goto out; atomic_add_long(&vn_io_faults_cnt, 1); uio_clone->uio_segflg = UIO_NOCOPY; uiomove(NULL, resid - uio->uio_resid, uio_clone); uio_clone->uio_segflg = uio->uio_segflg; saveheld = curthread_pflags_set(TDP_UIOHELD); prev_td_ma = td->td_ma; prev_td_ma_cnt = td->td_ma_cnt; while (uio_clone->uio_resid != 0) { len = uio_clone->uio_iov->iov_len; if (len == 0) { KASSERT(uio_clone->uio_iovcnt >= 1, ("iovcnt underflow")); uio_clone->uio_iov++; uio_clone->uio_iovcnt--; continue; } if (len > io_hold_cnt * PAGE_SIZE) len = io_hold_cnt * PAGE_SIZE; addr = (uintptr_t)uio_clone->uio_iov->iov_base; end = round_page(addr + len); if (end < addr) { error = EFAULT; break; } cnt = atop(end - trunc_page(addr)); /* * A perfectly misaligned address and length could cause * both the start and the end of the chunk to use partial * page. +2 accounts for such a situation. */ cnt = vm_fault_quick_hold_pages(&td->td_proc->p_vmspace->vm_map, addr, len, prot, ma, io_hold_cnt + 2); if (cnt == -1) { error = EFAULT; break; } short_uio.uio_iov = &short_iovec[0]; short_iovec[0].iov_base = (void *)addr; short_uio.uio_iovcnt = 1; short_uio.uio_resid = short_iovec[0].iov_len = len; short_uio.uio_offset = uio_clone->uio_offset; td->td_ma = ma; td->td_ma_cnt = cnt; error = vn_io_fault_doio(args, &short_uio, td); vm_page_unhold_pages(ma, cnt); adv = len - short_uio.uio_resid; uio_clone->uio_iov->iov_base = (char *)uio_clone->uio_iov->iov_base + adv; uio_clone->uio_iov->iov_len -= adv; uio_clone->uio_resid -= adv; uio_clone->uio_offset += adv; uio->uio_resid -= adv; uio->uio_offset += adv; if (error != 0 || adv == 0) break; } td->td_ma = prev_td_ma; td->td_ma_cnt = prev_td_ma_cnt; curthread_pflags_restore(saveheld); out: free(uio_clone, M_IOV); return (error); } static int vn_io_fault(struct file *fp, struct uio *uio, struct ucred *active_cred, int flags, struct thread *td) { fo_rdwr_t *doio; struct vnode *vp; void *rl_cookie; struct vn_io_fault_args args; int error; doio = uio->uio_rw == UIO_READ ? vn_read : vn_write; vp = fp->f_vnode; /* * The ability to read(2) on a directory has historically been * allowed for all users, but this can and has been the source of * at least one security issue in the past. As such, it is now hidden * away behind a sysctl for those that actually need it to use it, and * restricted to root when it's turned on to make it relatively safe to * leave on for longer sessions of need. */ if (vp->v_type == VDIR) { KASSERT(uio->uio_rw == UIO_READ, ("illegal write attempted on a directory")); if (!vfs_allow_read_dir) return (EISDIR); if ((error = priv_check(td, PRIV_VFS_READ_DIR)) != 0) return (EISDIR); } foffset_lock_uio(fp, uio, flags); if (do_vn_io_fault(vp, uio)) { args.kind = VN_IO_FAULT_FOP; args.args.fop_args.fp = fp; args.args.fop_args.doio = doio; args.cred = active_cred; args.flags = flags | FOF_OFFSET; if (uio->uio_rw == UIO_READ) { rl_cookie = vn_rangelock_rlock(vp, uio->uio_offset, uio->uio_offset + uio->uio_resid); } else if ((fp->f_flag & O_APPEND) != 0 || (flags & FOF_OFFSET) == 0) { /* For appenders, punt and lock the whole range. */ rl_cookie = vn_rangelock_wlock(vp, 0, OFF_MAX); } else { rl_cookie = vn_rangelock_wlock(vp, uio->uio_offset, uio->uio_offset + uio->uio_resid); } error = vn_io_fault1(vp, uio, &args, td); vn_rangelock_unlock(vp, rl_cookie); } else { error = doio(fp, uio, active_cred, flags | FOF_OFFSET, td); } foffset_unlock_uio(fp, uio, flags); return (error); } /* * Helper function to perform the requested uiomove operation using * the held pages for io->uio_iov[0].iov_base buffer instead of * copyin/copyout. Access to the pages with uiomove_fromphys() * instead of iov_base prevents page faults that could occur due to * pmap_collect() invalidating the mapping created by * vm_fault_quick_hold_pages(), or pageout daemon, page laundry or * object cleanup revoking the write access from page mappings. * * Filesystems specified MNTK_NO_IOPF shall use vn_io_fault_uiomove() * instead of plain uiomove(). */ int vn_io_fault_uiomove(char *data, int xfersize, struct uio *uio) { struct uio transp_uio; struct iovec transp_iov[1]; struct thread *td; size_t adv; int error, pgadv; td = curthread; if ((td->td_pflags & TDP_UIOHELD) == 0 || uio->uio_segflg != UIO_USERSPACE) return (uiomove(data, xfersize, uio)); KASSERT(uio->uio_iovcnt == 1, ("uio_iovcnt %d", uio->uio_iovcnt)); transp_iov[0].iov_base = data; transp_uio.uio_iov = &transp_iov[0]; transp_uio.uio_iovcnt = 1; if (xfersize > uio->uio_resid) xfersize = uio->uio_resid; transp_uio.uio_resid = transp_iov[0].iov_len = xfersize; transp_uio.uio_offset = 0; transp_uio.uio_segflg = UIO_SYSSPACE; /* * Since transp_iov points to data, and td_ma page array * corresponds to original uio->uio_iov, we need to invert the * direction of the i/o operation as passed to * uiomove_fromphys(). */ switch (uio->uio_rw) { case UIO_WRITE: transp_uio.uio_rw = UIO_READ; break; case UIO_READ: transp_uio.uio_rw = UIO_WRITE; break; } transp_uio.uio_td = uio->uio_td; error = uiomove_fromphys(td->td_ma, ((vm_offset_t)uio->uio_iov->iov_base) & PAGE_MASK, xfersize, &transp_uio); adv = xfersize - transp_uio.uio_resid; pgadv = (((vm_offset_t)uio->uio_iov->iov_base + adv) >> PAGE_SHIFT) - (((vm_offset_t)uio->uio_iov->iov_base) >> PAGE_SHIFT); td->td_ma += pgadv; KASSERT(td->td_ma_cnt >= pgadv, ("consumed pages %d %d", td->td_ma_cnt, pgadv)); td->td_ma_cnt -= pgadv; uio->uio_iov->iov_base = (char *)uio->uio_iov->iov_base + adv; uio->uio_iov->iov_len -= adv; uio->uio_resid -= adv; uio->uio_offset += adv; return (error); } int vn_io_fault_pgmove(vm_page_t ma[], vm_offset_t offset, int xfersize, struct uio *uio) { struct thread *td; vm_offset_t iov_base; int cnt, pgadv; td = curthread; if ((td->td_pflags & TDP_UIOHELD) == 0 || uio->uio_segflg != UIO_USERSPACE) return (uiomove_fromphys(ma, offset, xfersize, uio)); KASSERT(uio->uio_iovcnt == 1, ("uio_iovcnt %d", uio->uio_iovcnt)); cnt = xfersize > uio->uio_resid ? uio->uio_resid : xfersize; iov_base = (vm_offset_t)uio->uio_iov->iov_base; switch (uio->uio_rw) { case UIO_WRITE: pmap_copy_pages(td->td_ma, iov_base & PAGE_MASK, ma, offset, cnt); break; case UIO_READ: pmap_copy_pages(ma, offset, td->td_ma, iov_base & PAGE_MASK, cnt); break; } pgadv = ((iov_base + cnt) >> PAGE_SHIFT) - (iov_base >> PAGE_SHIFT); td->td_ma += pgadv; KASSERT(td->td_ma_cnt >= pgadv, ("consumed pages %d %d", td->td_ma_cnt, pgadv)); td->td_ma_cnt -= pgadv; uio->uio_iov->iov_base = (char *)(iov_base + cnt); uio->uio_iov->iov_len -= cnt; uio->uio_resid -= cnt; uio->uio_offset += cnt; return (0); } /* * File table truncate routine. */ static int vn_truncate(struct file *fp, off_t length, struct ucred *active_cred, struct thread *td) { struct mount *mp; struct vnode *vp; void *rl_cookie; int error; vp = fp->f_vnode; /* * Lock the whole range for truncation. Otherwise split i/o * might happen partly before and partly after the truncation. */ rl_cookie = vn_rangelock_wlock(vp, 0, OFF_MAX); error = vn_start_write(vp, &mp, V_WAIT | PCATCH); if (error) goto out1; vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); AUDIT_ARG_VNODE1(vp); if (vp->v_type == VDIR) { error = EISDIR; goto out; } #ifdef MAC error = mac_vnode_check_write(active_cred, fp->f_cred, vp); if (error) goto out; #endif error = vn_truncate_locked(vp, length, (fp->f_flag & O_FSYNC) != 0, fp->f_cred); out: VOP_UNLOCK(vp); vn_finished_write(mp); out1: vn_rangelock_unlock(vp, rl_cookie); return (error); } /* * Truncate a file that is already locked. */ int vn_truncate_locked(struct vnode *vp, off_t length, bool sync, struct ucred *cred) { struct vattr vattr; int error; error = VOP_ADD_WRITECOUNT(vp, 1); if (error == 0) { VATTR_NULL(&vattr); vattr.va_size = length; if (sync) vattr.va_vaflags |= VA_SYNC; error = VOP_SETATTR(vp, &vattr, cred); VOP_ADD_WRITECOUNT_CHECKED(vp, -1); } return (error); } /* * File table vnode stat routine. */ static int vn_statfile(struct file *fp, struct stat *sb, struct ucred *active_cred, struct thread *td) { struct vnode *vp = fp->f_vnode; int error; vn_lock(vp, LK_SHARED | LK_RETRY); - error = vn_stat(vp, sb, active_cred, fp->f_cred, td); + error = VOP_STAT(vp, sb, active_cred, fp->f_cred, td); VOP_UNLOCK(vp); return (error); } -/* - * Stat a vnode; implementation for the stat syscall - */ -int -vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, - struct ucred *file_cred, struct thread *td) -{ - struct vattr vattr; - struct vattr *vap; - int error; - u_short mode; - - AUDIT_ARG_VNODE1(vp); -#ifdef MAC - error = mac_vnode_check_stat(active_cred, file_cred, vp); - if (error) - return (error); -#endif - - vap = &vattr; - - /* - * Initialize defaults for new and unusual fields, so that file - * systems which don't support these fields don't need to know - * about them. - */ - vap->va_birthtime.tv_sec = -1; - vap->va_birthtime.tv_nsec = 0; - vap->va_fsid = VNOVAL; - vap->va_rdev = NODEV; - - error = VOP_GETATTR(vp, vap, active_cred); - if (error) - return (error); - - /* - * Zero the spare stat fields - */ - bzero(sb, sizeof *sb); - - /* - * Copy from vattr table - */ - if (vap->va_fsid != VNOVAL) - sb->st_dev = vap->va_fsid; - else - sb->st_dev = vp->v_mount->mnt_stat.f_fsid.val[0]; - sb->st_ino = vap->va_fileid; - mode = vap->va_mode; - switch (vap->va_type) { - case VREG: - mode |= S_IFREG; - break; - case VDIR: - mode |= S_IFDIR; - break; - case VBLK: - mode |= S_IFBLK; - break; - case VCHR: - mode |= S_IFCHR; - break; - case VLNK: - mode |= S_IFLNK; - break; - case VSOCK: - mode |= S_IFSOCK; - break; - case VFIFO: - mode |= S_IFIFO; - break; - default: - return (EBADF); - } - sb->st_mode = mode; - sb->st_nlink = vap->va_nlink; - sb->st_uid = vap->va_uid; - sb->st_gid = vap->va_gid; - sb->st_rdev = vap->va_rdev; - if (vap->va_size > OFF_MAX) - return (EOVERFLOW); - sb->st_size = vap->va_size; - sb->st_atim.tv_sec = vap->va_atime.tv_sec; - sb->st_atim.tv_nsec = vap->va_atime.tv_nsec; - sb->st_mtim.tv_sec = vap->va_mtime.tv_sec; - sb->st_mtim.tv_nsec = vap->va_mtime.tv_nsec; - sb->st_ctim.tv_sec = vap->va_ctime.tv_sec; - sb->st_ctim.tv_nsec = vap->va_ctime.tv_nsec; - sb->st_birthtim.tv_sec = vap->va_birthtime.tv_sec; - sb->st_birthtim.tv_nsec = vap->va_birthtime.tv_nsec; - - /* - * According to www.opengroup.org, the meaning of st_blksize is - * "a filesystem-specific preferred I/O block size for this - * object. In some filesystem types, this may vary from file - * to file" - * Use minimum/default of PAGE_SIZE (e.g. for VCHR). - */ - - sb->st_blksize = max(PAGE_SIZE, vap->va_blocksize); - - sb->st_flags = vap->va_flags; - if (priv_check_cred_vfs_generation(td->td_ucred)) - sb->st_gen = 0; - else - sb->st_gen = vap->va_gen; - - sb->st_blocks = vap->va_bytes / S_BLKSIZE; - return (0); -} - /* * File table vnode ioctl routine. */ static int vn_ioctl(struct file *fp, u_long com, void *data, struct ucred *active_cred, struct thread *td) { struct vattr vattr; struct vnode *vp; struct fiobmap2_arg *bmarg; int error; vp = fp->f_vnode; switch (vp->v_type) { case VDIR: case VREG: switch (com) { case FIONREAD: vn_lock(vp, LK_SHARED | LK_RETRY); error = VOP_GETATTR(vp, &vattr, active_cred); VOP_UNLOCK(vp); if (error == 0) *(int *)data = vattr.va_size - fp->f_offset; return (error); case FIOBMAP2: bmarg = (struct fiobmap2_arg *)data; vn_lock(vp, LK_SHARED | LK_RETRY); #ifdef MAC error = mac_vnode_check_read(active_cred, fp->f_cred, vp); if (error == 0) #endif error = VOP_BMAP(vp, bmarg->bn, NULL, &bmarg->bn, &bmarg->runp, &bmarg->runb); VOP_UNLOCK(vp); return (error); case FIONBIO: case FIOASYNC: return (0); default: return (VOP_IOCTL(vp, com, data, fp->f_flag, active_cred, td)); } break; case VCHR: return (VOP_IOCTL(vp, com, data, fp->f_flag, active_cred, td)); default: return (ENOTTY); } } /* * File table vnode poll routine. */ static int vn_poll(struct file *fp, int events, struct ucred *active_cred, struct thread *td) { struct vnode *vp; int error; vp = fp->f_vnode; #if defined(MAC) || defined(AUDIT) if (AUDITING_TD(td) || mac_vnode_check_poll_enabled()) { vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); AUDIT_ARG_VNODE1(vp); error = mac_vnode_check_poll(active_cred, fp->f_cred, vp); VOP_UNLOCK(vp); if (error != 0) return (error); } #endif error = VOP_POLL(vp, events, fp->f_cred, td); return (error); } /* * Acquire the requested lock and then check for validity. LK_RETRY * permits vn_lock to return doomed vnodes. */ static int __noinline _vn_lock_fallback(struct vnode *vp, int flags, const char *file, int line, int error) { KASSERT((flags & LK_RETRY) == 0 || error == 0, ("vn_lock: error %d incompatible with flags %#x", error, flags)); if (error == 0) VNASSERT(VN_IS_DOOMED(vp), vp, ("vnode not doomed")); if ((flags & LK_RETRY) == 0) { if (error == 0) { VOP_UNLOCK(vp); error = ENOENT; } return (error); } /* * LK_RETRY case. * * Nothing to do if we got the lock. */ if (error == 0) return (0); /* * Interlock was dropped by the call in _vn_lock. */ flags &= ~LK_INTERLOCK; do { error = VOP_LOCK1(vp, flags, file, line); } while (error != 0); return (0); } int _vn_lock(struct vnode *vp, int flags, const char *file, int line) { int error; VNASSERT((flags & LK_TYPE_MASK) != 0, vp, ("vn_lock: no locktype (%d passed)", flags)); VNPASS(vp->v_holdcnt > 0, vp); error = VOP_LOCK1(vp, flags, file, line); if (__predict_false(error != 0 || VN_IS_DOOMED(vp))) return (_vn_lock_fallback(vp, flags, file, line, error)); return (0); } /* * File table vnode close routine. */ static int vn_closefile(struct file *fp, struct thread *td) { struct vnode *vp; struct flock lf; int error; bool ref; vp = fp->f_vnode; fp->f_ops = &badfileops; ref= (fp->f_flag & FHASLOCK) != 0 && fp->f_type == DTYPE_VNODE; error = vn_close1(vp, fp->f_flag, fp->f_cred, td, ref); if (__predict_false(ref)) { lf.l_whence = SEEK_SET; lf.l_start = 0; lf.l_len = 0; lf.l_type = F_UNLCK; (void) VOP_ADVLOCK(vp, fp, F_UNLCK, &lf, F_FLOCK); vrele(vp); } return (error); } /* * Preparing to start a filesystem write operation. If the operation is * permitted, then we bump the count of operations in progress and * proceed. If a suspend request is in progress, we wait until the * suspension is over, and then proceed. */ static int vn_start_write_refed(struct mount *mp, int flags, bool mplocked) { int error, mflags; if (__predict_true(!mplocked) && (flags & V_XSLEEP) == 0 && vfs_op_thread_enter(mp)) { MPASS((mp->mnt_kern_flag & MNTK_SUSPEND) == 0); vfs_mp_count_add_pcpu(mp, writeopcount, 1); vfs_op_thread_exit(mp); return (0); } if (mplocked) mtx_assert(MNT_MTX(mp), MA_OWNED); else MNT_ILOCK(mp); error = 0; /* * Check on status of suspension. */ if ((curthread->td_pflags & TDP_IGNSUSP) == 0 || mp->mnt_susp_owner != curthread) { mflags = ((mp->mnt_vfc->vfc_flags & VFCF_SBDRY) != 0 ? (flags & PCATCH) : 0) | (PUSER - 1); while ((mp->mnt_kern_flag & MNTK_SUSPEND) != 0) { if (flags & V_NOWAIT) { error = EWOULDBLOCK; goto unlock; } error = msleep(&mp->mnt_flag, MNT_MTX(mp), mflags, "suspfs", 0); if (error) goto unlock; } } if (flags & V_XSLEEP) goto unlock; mp->mnt_writeopcount++; unlock: if (error != 0 || (flags & V_XSLEEP) != 0) MNT_REL(mp); MNT_IUNLOCK(mp); return (error); } int vn_start_write(struct vnode *vp, struct mount **mpp, int flags) { struct mount *mp; int error; KASSERT((flags & V_MNTREF) == 0 || (*mpp != NULL && vp == NULL), ("V_MNTREF requires mp")); error = 0; /* * If a vnode is provided, get and return the mount point that * to which it will write. */ if (vp != NULL) { if ((error = VOP_GETWRITEMOUNT(vp, mpp)) != 0) { *mpp = NULL; if (error != EOPNOTSUPP) return (error); return (0); } } if ((mp = *mpp) == NULL) return (0); /* * VOP_GETWRITEMOUNT() returns with the mp refcount held through * a vfs_ref(). * As long as a vnode is not provided we need to acquire a * refcount for the provided mountpoint too, in order to * emulate a vfs_ref(). */ if (vp == NULL && (flags & V_MNTREF) == 0) vfs_ref(mp); return (vn_start_write_refed(mp, flags, false)); } /* * Secondary suspension. Used by operations such as vop_inactive * routines that are needed by the higher level functions. These * are allowed to proceed until all the higher level functions have * completed (indicated by mnt_writeopcount dropping to zero). At that * time, these operations are halted until the suspension is over. */ int vn_start_secondary_write(struct vnode *vp, struct mount **mpp, int flags) { struct mount *mp; int error; KASSERT((flags & V_MNTREF) == 0 || (*mpp != NULL && vp == NULL), ("V_MNTREF requires mp")); retry: if (vp != NULL) { if ((error = VOP_GETWRITEMOUNT(vp, mpp)) != 0) { *mpp = NULL; if (error != EOPNOTSUPP) return (error); return (0); } } /* * If we are not suspended or have not yet reached suspended * mode, then let the operation proceed. */ if ((mp = *mpp) == NULL) return (0); /* * VOP_GETWRITEMOUNT() returns with the mp refcount held through * a vfs_ref(). * As long as a vnode is not provided we need to acquire a * refcount for the provided mountpoint too, in order to * emulate a vfs_ref(). */ MNT_ILOCK(mp); if (vp == NULL && (flags & V_MNTREF) == 0) MNT_REF(mp); if ((mp->mnt_kern_flag & (MNTK_SUSPENDED | MNTK_SUSPEND2)) == 0) { mp->mnt_secondary_writes++; mp->mnt_secondary_accwrites++; MNT_IUNLOCK(mp); return (0); } if (flags & V_NOWAIT) { MNT_REL(mp); MNT_IUNLOCK(mp); return (EWOULDBLOCK); } /* * Wait for the suspension to finish. */ error = msleep(&mp->mnt_flag, MNT_MTX(mp), (PUSER - 1) | PDROP | ((mp->mnt_vfc->vfc_flags & VFCF_SBDRY) != 0 ? (flags & PCATCH) : 0), "suspfs", 0); vfs_rel(mp); if (error == 0) goto retry; return (error); } /* * Filesystem write operation has completed. If we are suspending and this * operation is the last one, notify the suspender that the suspension is * now in effect. */ void vn_finished_write(struct mount *mp) { int c; if (mp == NULL) return; if (vfs_op_thread_enter(mp)) { vfs_mp_count_sub_pcpu(mp, writeopcount, 1); vfs_mp_count_sub_pcpu(mp, ref, 1); vfs_op_thread_exit(mp); return; } MNT_ILOCK(mp); vfs_assert_mount_counters(mp); MNT_REL(mp); c = --mp->mnt_writeopcount; if (mp->mnt_vfs_ops == 0) { MPASS((mp->mnt_kern_flag & MNTK_SUSPEND) == 0); MNT_IUNLOCK(mp); return; } if (c < 0) vfs_dump_mount_counters(mp); if ((mp->mnt_kern_flag & MNTK_SUSPEND) != 0 && c == 0) wakeup(&mp->mnt_writeopcount); MNT_IUNLOCK(mp); } /* * Filesystem secondary write operation has completed. If we are * suspending and this operation is the last one, notify the suspender * that the suspension is now in effect. */ void vn_finished_secondary_write(struct mount *mp) { if (mp == NULL) return; MNT_ILOCK(mp); MNT_REL(mp); mp->mnt_secondary_writes--; if (mp->mnt_secondary_writes < 0) panic("vn_finished_secondary_write: neg cnt"); if ((mp->mnt_kern_flag & MNTK_SUSPEND) != 0 && mp->mnt_secondary_writes <= 0) wakeup(&mp->mnt_secondary_writes); MNT_IUNLOCK(mp); } /* * Request a filesystem to suspend write operations. */ int vfs_write_suspend(struct mount *mp, int flags) { int error; vfs_op_enter(mp); MNT_ILOCK(mp); vfs_assert_mount_counters(mp); if (mp->mnt_susp_owner == curthread) { vfs_op_exit_locked(mp); MNT_IUNLOCK(mp); return (EALREADY); } while (mp->mnt_kern_flag & MNTK_SUSPEND) msleep(&mp->mnt_flag, MNT_MTX(mp), PUSER - 1, "wsuspfs", 0); /* * Unmount holds a write reference on the mount point. If we * own busy reference and drain for writers, we deadlock with * the reference draining in the unmount path. Callers of * vfs_write_suspend() must specify VS_SKIP_UNMOUNT if * vfs_busy() reference is owned and caller is not in the * unmount context. */ if ((flags & VS_SKIP_UNMOUNT) != 0 && (mp->mnt_kern_flag & MNTK_UNMOUNT) != 0) { vfs_op_exit_locked(mp); MNT_IUNLOCK(mp); return (EBUSY); } mp->mnt_kern_flag |= MNTK_SUSPEND; mp->mnt_susp_owner = curthread; if (mp->mnt_writeopcount > 0) (void) msleep(&mp->mnt_writeopcount, MNT_MTX(mp), (PUSER - 1)|PDROP, "suspwt", 0); else MNT_IUNLOCK(mp); if ((error = VFS_SYNC(mp, MNT_SUSPEND)) != 0) { vfs_write_resume(mp, 0); /* vfs_write_resume does vfs_op_exit() for us */ } return (error); } /* * Request a filesystem to resume write operations. */ void vfs_write_resume(struct mount *mp, int flags) { MNT_ILOCK(mp); if ((mp->mnt_kern_flag & MNTK_SUSPEND) != 0) { KASSERT(mp->mnt_susp_owner == curthread, ("mnt_susp_owner")); mp->mnt_kern_flag &= ~(MNTK_SUSPEND | MNTK_SUSPEND2 | MNTK_SUSPENDED); mp->mnt_susp_owner = NULL; wakeup(&mp->mnt_writeopcount); wakeup(&mp->mnt_flag); curthread->td_pflags &= ~TDP_IGNSUSP; if ((flags & VR_START_WRITE) != 0) { MNT_REF(mp); mp->mnt_writeopcount++; } MNT_IUNLOCK(mp); if ((flags & VR_NO_SUSPCLR) == 0) VFS_SUSP_CLEAN(mp); vfs_op_exit(mp); } else if ((flags & VR_START_WRITE) != 0) { MNT_REF(mp); vn_start_write_refed(mp, 0, true); } else { MNT_IUNLOCK(mp); } } /* * Helper loop around vfs_write_suspend() for filesystem unmount VFS * methods. */ int vfs_write_suspend_umnt(struct mount *mp) { int error; KASSERT((curthread->td_pflags & TDP_IGNSUSP) == 0, ("vfs_write_suspend_umnt: recursed")); /* dounmount() already called vn_start_write(). */ for (;;) { vn_finished_write(mp); error = vfs_write_suspend(mp, 0); if (error != 0) { vn_start_write(NULL, &mp, V_WAIT); return (error); } MNT_ILOCK(mp); if ((mp->mnt_kern_flag & MNTK_SUSPENDED) != 0) break; MNT_IUNLOCK(mp); vn_start_write(NULL, &mp, V_WAIT); } mp->mnt_kern_flag &= ~(MNTK_SUSPENDED | MNTK_SUSPEND2); wakeup(&mp->mnt_flag); MNT_IUNLOCK(mp); curthread->td_pflags |= TDP_IGNSUSP; return (0); } /* * Implement kqueues for files by translating it to vnode operation. */ static int vn_kqfilter(struct file *fp, struct knote *kn) { return (VOP_KQFILTER(fp->f_vnode, kn)); } /* * Simplified in-kernel wrapper calls for extended attribute access. * Both calls pass in a NULL credential, authorizing as "kernel" access. * Set IO_NODELOCKED in ioflg if the vnode is already locked. */ int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, const char *attrname, int *buflen, char *buf, struct thread *td) { struct uio auio; struct iovec iov; int error; iov.iov_len = *buflen; iov.iov_base = buf; auio.uio_iov = &iov; auio.uio_iovcnt = 1; auio.uio_rw = UIO_READ; auio.uio_segflg = UIO_SYSSPACE; auio.uio_td = td; auio.uio_offset = 0; auio.uio_resid = *buflen; if ((ioflg & IO_NODELOCKED) == 0) vn_lock(vp, LK_SHARED | LK_RETRY); ASSERT_VOP_LOCKED(vp, "IO_NODELOCKED with no vp lock held"); /* authorize attribute retrieval as kernel */ error = VOP_GETEXTATTR(vp, attrnamespace, attrname, &auio, NULL, NULL, td); if ((ioflg & IO_NODELOCKED) == 0) VOP_UNLOCK(vp); if (error == 0) { *buflen = *buflen - auio.uio_resid; } return (error); } /* * XXX failure mode if partially written? */ int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, const char *attrname, int buflen, char *buf, struct thread *td) { struct uio auio; struct iovec iov; struct mount *mp; int error; iov.iov_len = buflen; iov.iov_base = buf; auio.uio_iov = &iov; auio.uio_iovcnt = 1; auio.uio_rw = UIO_WRITE; auio.uio_segflg = UIO_SYSSPACE; auio.uio_td = td; auio.uio_offset = 0; auio.uio_resid = buflen; if ((ioflg & IO_NODELOCKED) == 0) { if ((error = vn_start_write(vp, &mp, V_WAIT)) != 0) return (error); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); } ASSERT_VOP_LOCKED(vp, "IO_NODELOCKED with no vp lock held"); /* authorize attribute setting as kernel */ error = VOP_SETEXTATTR(vp, attrnamespace, attrname, &auio, NULL, td); if ((ioflg & IO_NODELOCKED) == 0) { vn_finished_write(mp); VOP_UNLOCK(vp); } return (error); } int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, const char *attrname, struct thread *td) { struct mount *mp; int error; if ((ioflg & IO_NODELOCKED) == 0) { if ((error = vn_start_write(vp, &mp, V_WAIT)) != 0) return (error); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); } ASSERT_VOP_LOCKED(vp, "IO_NODELOCKED with no vp lock held"); /* authorize attribute removal as kernel */ error = VOP_DELETEEXTATTR(vp, attrnamespace, attrname, NULL, td); if (error == EOPNOTSUPP) error = VOP_SETEXTATTR(vp, attrnamespace, attrname, NULL, NULL, td); if ((ioflg & IO_NODELOCKED) == 0) { vn_finished_write(mp); VOP_UNLOCK(vp); } return (error); } static int vn_get_ino_alloc_vget(struct mount *mp, void *arg, int lkflags, struct vnode **rvp) { return (VFS_VGET(mp, *(ino_t *)arg, lkflags, rvp)); } int vn_vget_ino(struct vnode *vp, ino_t ino, int lkflags, struct vnode **rvp) { return (vn_vget_ino_gen(vp, vn_get_ino_alloc_vget, &ino, lkflags, rvp)); } int vn_vget_ino_gen(struct vnode *vp, vn_get_ino_t alloc, void *alloc_arg, int lkflags, struct vnode **rvp) { struct mount *mp; int ltype, error; ASSERT_VOP_LOCKED(vp, "vn_vget_ino_get"); mp = vp->v_mount; ltype = VOP_ISLOCKED(vp); KASSERT(ltype == LK_EXCLUSIVE || ltype == LK_SHARED, ("vn_vget_ino: vp not locked")); error = vfs_busy(mp, MBF_NOWAIT); if (error != 0) { vfs_ref(mp); VOP_UNLOCK(vp); error = vfs_busy(mp, 0); vn_lock(vp, ltype | LK_RETRY); vfs_rel(mp); if (error != 0) return (ENOENT); if (VN_IS_DOOMED(vp)) { vfs_unbusy(mp); return (ENOENT); } } VOP_UNLOCK(vp); error = alloc(mp, alloc_arg, lkflags, rvp); vfs_unbusy(mp); if (error != 0 || *rvp != vp) vn_lock(vp, ltype | LK_RETRY); if (VN_IS_DOOMED(vp)) { if (error == 0) { if (*rvp == vp) vunref(vp); else vput(*rvp); } error = ENOENT; } return (error); } int vn_rlimit_fsize(const struct vnode *vp, const struct uio *uio, struct thread *td) { if (vp->v_type != VREG || td == NULL) return (0); if ((uoff_t)uio->uio_offset + uio->uio_resid > lim_cur(td, RLIMIT_FSIZE)) { PROC_LOCK(td->td_proc); kern_psignal(td->td_proc, SIGXFSZ); PROC_UNLOCK(td->td_proc); return (EFBIG); } return (0); } int vn_chmod(struct file *fp, mode_t mode, struct ucred *active_cred, struct thread *td) { struct vnode *vp; vp = fp->f_vnode; #ifdef AUDIT vn_lock(vp, LK_SHARED | LK_RETRY); AUDIT_ARG_VNODE1(vp); VOP_UNLOCK(vp); #endif return (setfmode(td, active_cred, vp, mode)); } int vn_chown(struct file *fp, uid_t uid, gid_t gid, struct ucred *active_cred, struct thread *td) { struct vnode *vp; vp = fp->f_vnode; #ifdef AUDIT vn_lock(vp, LK_SHARED | LK_RETRY); AUDIT_ARG_VNODE1(vp); VOP_UNLOCK(vp); #endif return (setfown(td, active_cred, vp, uid, gid)); } void vn_pages_remove(struct vnode *vp, vm_pindex_t start, vm_pindex_t end) { vm_object_t object; if ((object = vp->v_object) == NULL) return; VM_OBJECT_WLOCK(object); vm_object_page_remove(object, start, end, 0); VM_OBJECT_WUNLOCK(object); } int vn_bmap_seekhole(struct vnode *vp, u_long cmd, off_t *off, struct ucred *cred) { struct vattr va; daddr_t bn, bnp; uint64_t bsize; off_t noff; int error; KASSERT(cmd == FIOSEEKHOLE || cmd == FIOSEEKDATA, ("Wrong command %lu", cmd)); if (vn_lock(vp, LK_SHARED) != 0) return (EBADF); if (vp->v_type != VREG) { error = ENOTTY; goto unlock; } error = VOP_GETATTR(vp, &va, cred); if (error != 0) goto unlock; noff = *off; if (noff >= va.va_size) { error = ENXIO; goto unlock; } bsize = vp->v_mount->mnt_stat.f_iosize; for (bn = noff / bsize; noff < va.va_size; bn++, noff += bsize - noff % bsize) { error = VOP_BMAP(vp, bn, NULL, &bnp, NULL, NULL); if (error == EOPNOTSUPP) { error = ENOTTY; goto unlock; } if ((bnp == -1 && cmd == FIOSEEKHOLE) || (bnp != -1 && cmd == FIOSEEKDATA)) { noff = bn * bsize; if (noff < *off) noff = *off; goto unlock; } } if (noff > va.va_size) noff = va.va_size; /* noff == va.va_size. There is an implicit hole at the end of file. */ if (cmd == FIOSEEKDATA) error = ENXIO; unlock: VOP_UNLOCK(vp); if (error == 0) *off = noff; return (error); } int vn_seek(struct file *fp, off_t offset, int whence, struct thread *td) { struct ucred *cred; struct vnode *vp; struct vattr vattr; off_t foffset, size; int error, noneg; cred = td->td_ucred; vp = fp->f_vnode; foffset = foffset_lock(fp, 0); noneg = (vp->v_type != VCHR); error = 0; switch (whence) { case L_INCR: if (noneg && (foffset < 0 || (offset > 0 && foffset > OFF_MAX - offset))) { error = EOVERFLOW; break; } offset += foffset; break; case L_XTND: vn_lock(vp, LK_SHARED | LK_RETRY); error = VOP_GETATTR(vp, &vattr, cred); VOP_UNLOCK(vp); if (error) break; /* * If the file references a disk device, then fetch * the media size and use that to determine the ending * offset. */ if (vattr.va_size == 0 && vp->v_type == VCHR && fo_ioctl(fp, DIOCGMEDIASIZE, &size, cred, td) == 0) vattr.va_size = size; if (noneg && (vattr.va_size > OFF_MAX || (offset > 0 && vattr.va_size > OFF_MAX - offset))) { error = EOVERFLOW; break; } offset += vattr.va_size; break; case L_SET: break; case SEEK_DATA: error = fo_ioctl(fp, FIOSEEKDATA, &offset, cred, td); if (error == ENOTTY) error = EINVAL; break; case SEEK_HOLE: error = fo_ioctl(fp, FIOSEEKHOLE, &offset, cred, td); if (error == ENOTTY) error = EINVAL; break; default: error = EINVAL; } if (error == 0 && noneg && offset < 0) error = EINVAL; if (error != 0) goto drop; VFS_KNOTE_UNLOCKED(vp, 0); td->td_uretoff.tdu_off = offset; drop: foffset_unlock(fp, offset, error != 0 ? FOF_NOUPDATE : 0); return (error); } int vn_utimes_perm(struct vnode *vp, struct vattr *vap, struct ucred *cred, struct thread *td) { int error; /* * Grant permission if the caller is the owner of the file, or * the super-user, or has ACL_WRITE_ATTRIBUTES permission on * on the file. If the time pointer is null, then write * permission on the file is also sufficient. * * From NFSv4.1, draft 21, 6.2.1.3.1, Discussion of Mask Attributes: * A user having ACL_WRITE_DATA or ACL_WRITE_ATTRIBUTES * will be allowed to set the times [..] to the current * server time. */ error = VOP_ACCESSX(vp, VWRITE_ATTRIBUTES, cred, td); if (error != 0 && (vap->va_vaflags & VA_UTIMES_NULL) != 0) error = VOP_ACCESS(vp, VWRITE, cred, td); return (error); } int vn_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp) { struct vnode *vp; int error; if (fp->f_type == DTYPE_FIFO) kif->kf_type = KF_TYPE_FIFO; else kif->kf_type = KF_TYPE_VNODE; vp = fp->f_vnode; vref(vp); FILEDESC_SUNLOCK(fdp); error = vn_fill_kinfo_vnode(vp, kif); vrele(vp); FILEDESC_SLOCK(fdp); return (error); } static inline void vn_fill_junk(struct kinfo_file *kif) { size_t len, olen; /* * Simulate vn_fullpath returning changing values for a given * vp during e.g. coredump. */ len = (arc4random() % (sizeof(kif->kf_path) - 2)) + 1; olen = strlen(kif->kf_path); if (len < olen) strcpy(&kif->kf_path[len - 1], "$"); else for (; olen < len; olen++) strcpy(&kif->kf_path[olen], "A"); } int vn_fill_kinfo_vnode(struct vnode *vp, struct kinfo_file *kif) { struct vattr va; char *fullpath, *freepath; int error; kif->kf_un.kf_file.kf_file_type = vntype_to_kinfo(vp->v_type); freepath = NULL; fullpath = "-"; error = vn_fullpath(curthread, vp, &fullpath, &freepath); if (error == 0) { strlcpy(kif->kf_path, fullpath, sizeof(kif->kf_path)); } if (freepath != NULL) free(freepath, M_TEMP); KFAIL_POINT_CODE(DEBUG_FP, fill_kinfo_vnode__random_path, vn_fill_junk(kif); ); /* * Retrieve vnode attributes. */ va.va_fsid = VNOVAL; va.va_rdev = NODEV; vn_lock(vp, LK_SHARED | LK_RETRY); error = VOP_GETATTR(vp, &va, curthread->td_ucred); VOP_UNLOCK(vp); if (error != 0) return (error); if (va.va_fsid != VNOVAL) kif->kf_un.kf_file.kf_file_fsid = va.va_fsid; else kif->kf_un.kf_file.kf_file_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; kif->kf_un.kf_file.kf_file_fsid_freebsd11 = kif->kf_un.kf_file.kf_file_fsid; /* truncate */ kif->kf_un.kf_file.kf_file_fileid = va.va_fileid; kif->kf_un.kf_file.kf_file_mode = MAKEIMODE(va.va_type, va.va_mode); kif->kf_un.kf_file.kf_file_size = va.va_size; kif->kf_un.kf_file.kf_file_rdev = va.va_rdev; kif->kf_un.kf_file.kf_file_rdev_freebsd11 = kif->kf_un.kf_file.kf_file_rdev; /* truncate */ return (0); } int vn_mmap(struct file *fp, vm_map_t map, vm_offset_t *addr, vm_size_t size, vm_prot_t prot, vm_prot_t cap_maxprot, int flags, vm_ooffset_t foff, struct thread *td) { #ifdef HWPMC_HOOKS struct pmckern_map_in pkm; #endif struct mount *mp; struct vnode *vp; vm_object_t object; vm_prot_t maxprot; boolean_t writecounted; int error; #if defined(COMPAT_FREEBSD7) || defined(COMPAT_FREEBSD6) || \ defined(COMPAT_FREEBSD5) || defined(COMPAT_FREEBSD4) /* * POSIX shared-memory objects are defined to have * kernel persistence, and are not defined to support * read(2)/write(2) -- or even open(2). Thus, we can * use MAP_ASYNC to trade on-disk coherence for speed. * The shm_open(3) library routine turns on the FPOSIXSHM * flag to request this behavior. */ if ((fp->f_flag & FPOSIXSHM) != 0) flags |= MAP_NOSYNC; #endif vp = fp->f_vnode; /* * Ensure that file and memory protections are * compatible. Note that we only worry about * writability if mapping is shared; in this case, * current and max prot are dictated by the open file. * XXX use the vnode instead? Problem is: what * credentials do we use for determination? What if * proc does a setuid? */ mp = vp->v_mount; if (mp != NULL && (mp->mnt_flag & MNT_NOEXEC) != 0) { maxprot = VM_PROT_NONE; if ((prot & VM_PROT_EXECUTE) != 0) return (EACCES); } else maxprot = VM_PROT_EXECUTE; if ((fp->f_flag & FREAD) != 0) maxprot |= VM_PROT_READ; else if ((prot & VM_PROT_READ) != 0) return (EACCES); /* * If we are sharing potential changes via MAP_SHARED and we * are trying to get write permission although we opened it * without asking for it, bail out. */ if ((flags & MAP_SHARED) != 0) { if ((fp->f_flag & FWRITE) != 0) maxprot |= VM_PROT_WRITE; else if ((prot & VM_PROT_WRITE) != 0) return (EACCES); } else { maxprot |= VM_PROT_WRITE; cap_maxprot |= VM_PROT_WRITE; } maxprot &= cap_maxprot; /* * For regular files and shared memory, POSIX requires that * the value of foff be a legitimate offset within the data * object. In particular, negative offsets are invalid. * Blocking negative offsets and overflows here avoids * possible wraparound or user-level access into reserved * ranges of the data object later. In contrast, POSIX does * not dictate how offsets are used by device drivers, so in * the case of a device mapping a negative offset is passed * on. */ if ( #ifdef _LP64 size > OFF_MAX || #endif foff < 0 || foff > OFF_MAX - size) return (EINVAL); writecounted = FALSE; error = vm_mmap_vnode(td, size, prot, &maxprot, &flags, vp, &foff, &object, &writecounted); if (error != 0) return (error); error = vm_mmap_object(map, addr, size, prot, maxprot, flags, object, foff, writecounted, td); if (error != 0) { /* * If this mapping was accounted for in the vnode's * writecount, then undo that now. */ if (writecounted) vm_pager_release_writecount(object, 0, size); vm_object_deallocate(object); } #ifdef HWPMC_HOOKS /* Inform hwpmc(4) if an executable is being mapped. */ if (PMC_HOOK_INSTALLED(PMC_FN_MMAP)) { if ((prot & VM_PROT_EXECUTE) != 0 && error == 0) { pkm.pm_file = vp; pkm.pm_address = (uintptr_t) *addr; PMC_CALL_HOOK_UNLOCKED(td, PMC_FN_MMAP, (void *) &pkm); } } #endif return (error); } void vn_fsid(struct vnode *vp, struct vattr *va) { fsid_t *f; f = &vp->v_mount->mnt_stat.f_fsid; va->va_fsid = (uint32_t)f->val[1]; va->va_fsid <<= sizeof(f->val[1]) * NBBY; va->va_fsid += (uint32_t)f->val[0]; } int vn_fsync_buf(struct vnode *vp, int waitfor) { struct buf *bp, *nbp; struct bufobj *bo; struct mount *mp; int error, maxretry; error = 0; maxretry = 10000; /* large, arbitrarily chosen */ mp = NULL; if (vp->v_type == VCHR) { VI_LOCK(vp); mp = vp->v_rdev->si_mountpt; VI_UNLOCK(vp); } bo = &vp->v_bufobj; BO_LOCK(bo); loop1: /* * MARK/SCAN initialization to avoid infinite loops. */ TAILQ_FOREACH(bp, &bo->bo_dirty.bv_hd, b_bobufs) { bp->b_vflags &= ~BV_SCANNED; bp->b_error = 0; } /* * Flush all dirty buffers associated with a vnode. */ loop2: TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) { if ((bp->b_vflags & BV_SCANNED) != 0) continue; bp->b_vflags |= BV_SCANNED; if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) { if (waitfor != MNT_WAIT) continue; if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_INTERLOCK | LK_SLEEPFAIL, BO_LOCKPTR(bo)) != 0) { BO_LOCK(bo); goto loop1; } BO_LOCK(bo); } BO_UNLOCK(bo); KASSERT(bp->b_bufobj == bo, ("bp %p wrong b_bufobj %p should be %p", bp, bp->b_bufobj, bo)); if ((bp->b_flags & B_DELWRI) == 0) panic("fsync: not dirty"); if ((vp->v_object != NULL) && (bp->b_flags & B_CLUSTEROK)) { vfs_bio_awrite(bp); } else { bremfree(bp); bawrite(bp); } if (maxretry < 1000) pause("dirty", hz < 1000 ? 1 : hz / 1000); BO_LOCK(bo); goto loop2; } /* * If synchronous the caller expects us to completely resolve all * dirty buffers in the system. Wait for in-progress I/O to * complete (which could include background bitmap writes), then * retry if dirty blocks still exist. */ if (waitfor == MNT_WAIT) { bufobj_wwait(bo, 0, 0); if (bo->bo_dirty.bv_cnt > 0) { /* * If we are unable to write any of these buffers * then we fail now rather than trying endlessly * to write them out. */ TAILQ_FOREACH(bp, &bo->bo_dirty.bv_hd, b_bobufs) if ((error = bp->b_error) != 0) break; if ((mp != NULL && mp->mnt_secondary_writes > 0) || (error == 0 && --maxretry >= 0)) goto loop1; if (error == 0) error = EAGAIN; } } BO_UNLOCK(bo); if (error != 0) vn_printf(vp, "fsync: giving up on dirty (error = %d) ", error); return (error); } /* * Copies a byte range from invp to outvp. Calls VOP_COPY_FILE_RANGE() * or vn_generic_copy_file_range() after rangelocking the byte ranges, * to do the actual copy. * vn_generic_copy_file_range() is factored out, so it can be called * from a VOP_COPY_FILE_RANGE() call as well, but handles vnodes from * different file systems. */ int vn_copy_file_range(struct vnode *invp, off_t *inoffp, struct vnode *outvp, off_t *outoffp, size_t *lenp, unsigned int flags, struct ucred *incred, struct ucred *outcred, struct thread *fsize_td) { int error; size_t len; uint64_t uvalin, uvalout; len = *lenp; *lenp = 0; /* For error returns. */ error = 0; /* Do some sanity checks on the arguments. */ uvalin = *inoffp; uvalin += len; uvalout = *outoffp; uvalout += len; if (invp->v_type == VDIR || outvp->v_type == VDIR) error = EISDIR; else if (*inoffp < 0 || uvalin > INT64_MAX || uvalin < (uint64_t)*inoffp || *outoffp < 0 || uvalout > INT64_MAX || uvalout < (uint64_t)*outoffp || invp->v_type != VREG || outvp->v_type != VREG) error = EINVAL; if (error != 0) goto out; /* * If the two vnode are for the same file system, call * VOP_COPY_FILE_RANGE(), otherwise call vn_generic_copy_file_range() * which can handle copies across multiple file systems. */ *lenp = len; if (invp->v_mount == outvp->v_mount) error = VOP_COPY_FILE_RANGE(invp, inoffp, outvp, outoffp, lenp, flags, incred, outcred, fsize_td); else error = vn_generic_copy_file_range(invp, inoffp, outvp, outoffp, lenp, flags, incred, outcred, fsize_td); out: return (error); } /* * Test len bytes of data starting at dat for all bytes == 0. * Return true if all bytes are zero, false otherwise. * Expects dat to be well aligned. */ static bool mem_iszero(void *dat, int len) { int i; const u_int *p; const char *cp; for (p = dat; len > 0; len -= sizeof(*p), p++) { if (len >= sizeof(*p)) { if (*p != 0) return (false); } else { cp = (const char *)p; for (i = 0; i < len; i++, cp++) if (*cp != '\0') return (false); } } return (true); } /* * Look for a hole in the output file and, if found, adjust *outoffp * and *xferp to skip past the hole. * *xferp is the entire hole length to be written and xfer2 is how many bytes * to be written as 0's upon return. */ static off_t vn_skip_hole(struct vnode *outvp, off_t xfer2, off_t *outoffp, off_t *xferp, off_t *dataoffp, off_t *holeoffp, struct ucred *cred) { int error; off_t delta; if (*holeoffp == 0 || *holeoffp <= *outoffp) { *dataoffp = *outoffp; error = VOP_IOCTL(outvp, FIOSEEKDATA, dataoffp, 0, cred, curthread); if (error == 0) { *holeoffp = *dataoffp; error = VOP_IOCTL(outvp, FIOSEEKHOLE, holeoffp, 0, cred, curthread); } if (error != 0 || *holeoffp == *dataoffp) { /* * Since outvp is unlocked, it may be possible for * another thread to do a truncate(), lseek(), write() * creating a hole at startoff between the above * VOP_IOCTL() calls, if the other thread does not do * rangelocking. * If that happens, *holeoffp == *dataoffp and finding * the hole has failed, so disable vn_skip_hole(). */ *holeoffp = -1; /* Disable use of vn_skip_hole(). */ return (xfer2); } KASSERT(*dataoffp >= *outoffp, ("vn_skip_hole: dataoff=%jd < outoff=%jd", (intmax_t)*dataoffp, (intmax_t)*outoffp)); KASSERT(*holeoffp > *dataoffp, ("vn_skip_hole: holeoff=%jd <= dataoff=%jd", (intmax_t)*holeoffp, (intmax_t)*dataoffp)); } /* * If there is a hole before the data starts, advance *outoffp and * *xferp past the hole. */ if (*dataoffp > *outoffp) { delta = *dataoffp - *outoffp; if (delta >= *xferp) { /* Entire *xferp is a hole. */ *outoffp += *xferp; *xferp = 0; return (0); } *xferp -= delta; *outoffp += delta; xfer2 = MIN(xfer2, *xferp); } /* * If a hole starts before the end of this xfer2, reduce this xfer2 so * that the write ends at the start of the hole. * *holeoffp should always be greater than *outoffp, but for the * non-INVARIANTS case, check this to make sure xfer2 remains a sane * value. */ if (*holeoffp > *outoffp && *holeoffp < *outoffp + xfer2) xfer2 = *holeoffp - *outoffp; return (xfer2); } /* * Write an xfer sized chunk to outvp in blksize blocks from dat. * dat is a maximum of blksize in length and can be written repeatedly in * the chunk. * If growfile == true, just grow the file via vn_truncate_locked() instead * of doing actual writes. * If checkhole == true, a hole is being punched, so skip over any hole * already in the output file. */ static int vn_write_outvp(struct vnode *outvp, char *dat, off_t outoff, off_t xfer, u_long blksize, bool growfile, bool checkhole, struct ucred *cred) { struct mount *mp; off_t dataoff, holeoff, xfer2; int error, lckf; /* * Loop around doing writes of blksize until write has been completed. * Lock/unlock on each loop iteration so that a bwillwrite() can be * done for each iteration, since the xfer argument can be very * large if there is a large hole to punch in the output file. */ error = 0; holeoff = 0; do { xfer2 = MIN(xfer, blksize); if (checkhole) { /* * Punching a hole. Skip writing if there is * already a hole in the output file. */ xfer2 = vn_skip_hole(outvp, xfer2, &outoff, &xfer, &dataoff, &holeoff, cred); if (xfer == 0) break; if (holeoff < 0) checkhole = false; KASSERT(xfer2 > 0, ("vn_write_outvp: xfer2=%jd", (intmax_t)xfer2)); } bwillwrite(); mp = NULL; error = vn_start_write(outvp, &mp, V_WAIT); if (error == 0) { if (MNT_SHARED_WRITES(mp)) lckf = LK_SHARED; else lckf = LK_EXCLUSIVE; error = vn_lock(outvp, lckf); } if (error == 0) { if (growfile) error = vn_truncate_locked(outvp, outoff + xfer, false, cred); else { error = vn_rdwr(UIO_WRITE, outvp, dat, xfer2, outoff, UIO_SYSSPACE, IO_NODELOCKED, curthread->td_ucred, cred, NULL, curthread); outoff += xfer2; xfer -= xfer2; } VOP_UNLOCK(outvp); } if (mp != NULL) vn_finished_write(mp); } while (!growfile && xfer > 0 && error == 0); return (error); } /* * Copy a byte range of one file to another. This function can handle the * case where invp and outvp are on different file systems. * It can also be called by a VOP_COPY_FILE_RANGE() to do the work, if there * is no better file system specific way to do it. */ int vn_generic_copy_file_range(struct vnode *invp, off_t *inoffp, struct vnode *outvp, off_t *outoffp, size_t *lenp, unsigned int flags, struct ucred *incred, struct ucred *outcred, struct thread *fsize_td) { struct vattr va; struct mount *mp; struct uio io; off_t startoff, endoff, xfer, xfer2; u_long blksize; int error; bool cantseek, readzeros, eof, lastblock; ssize_t aresid; size_t copylen, len, savlen; char *dat; long holein, holeout; holein = holeout = 0; savlen = len = *lenp; error = 0; dat = NULL; error = vn_lock(invp, LK_SHARED); if (error != 0) goto out; if (VOP_PATHCONF(invp, _PC_MIN_HOLE_SIZE, &holein) != 0) holein = 0; VOP_UNLOCK(invp); mp = NULL; error = vn_start_write(outvp, &mp, V_WAIT); if (error == 0) error = vn_lock(outvp, LK_EXCLUSIVE); if (error == 0) { /* * If fsize_td != NULL, do a vn_rlimit_fsize() call, * now that outvp is locked. */ if (fsize_td != NULL) { io.uio_offset = *outoffp; io.uio_resid = len; error = vn_rlimit_fsize(outvp, &io, fsize_td); if (error != 0) error = EFBIG; } if (VOP_PATHCONF(outvp, _PC_MIN_HOLE_SIZE, &holeout) != 0) holeout = 0; /* * Holes that are past EOF do not need to be written as a block * of zero bytes. So, truncate the output file as far as * possible and then use va.va_size to decide if writing 0 * bytes is necessary in the loop below. */ if (error == 0) error = VOP_GETATTR(outvp, &va, outcred); if (error == 0 && va.va_size > *outoffp && va.va_size <= *outoffp + len) { #ifdef MAC error = mac_vnode_check_write(curthread->td_ucred, outcred, outvp); if (error == 0) #endif error = vn_truncate_locked(outvp, *outoffp, false, outcred); if (error == 0) va.va_size = *outoffp; } VOP_UNLOCK(outvp); } if (mp != NULL) vn_finished_write(mp); if (error != 0) goto out; /* * Set the blksize to the larger of the hole sizes for invp and outvp. * If hole sizes aren't available, set the blksize to the larger * f_iosize of invp and outvp. * This code expects the hole sizes and f_iosizes to be powers of 2. * This value is clipped at 4Kbytes and 1Mbyte. */ blksize = MAX(holein, holeout); if (blksize == 0) blksize = MAX(invp->v_mount->mnt_stat.f_iosize, outvp->v_mount->mnt_stat.f_iosize); if (blksize < 4096) blksize = 4096; else if (blksize > 1024 * 1024) blksize = 1024 * 1024; dat = malloc(blksize, M_TEMP, M_WAITOK); /* * If VOP_IOCTL(FIOSEEKHOLE) works for invp, use it and FIOSEEKDATA * to find holes. Otherwise, just scan the read block for all 0s * in the inner loop where the data copying is done. * Note that some file systems such as NFSv3, NFSv4.0 and NFSv4.1 may * support holes on the server, but do not support FIOSEEKHOLE. */ eof = false; while (len > 0 && error == 0 && !eof) { endoff = 0; /* To shut up compilers. */ cantseek = true; startoff = *inoffp; copylen = len; /* * Find the next data area. If there is just a hole to EOF, * FIOSEEKDATA should fail and then we drop down into the * inner loop and create the hole on the outvp file. * (I do not know if any file system will report a hole to * EOF via FIOSEEKHOLE, but I am pretty sure FIOSEEKDATA * will fail for those file systems.) * * For input files that don't support FIOSEEKDATA/FIOSEEKHOLE, * the code just falls through to the inner copy loop. */ error = EINVAL; if (holein > 0) error = VOP_IOCTL(invp, FIOSEEKDATA, &startoff, 0, incred, curthread); if (error == 0) { endoff = startoff; error = VOP_IOCTL(invp, FIOSEEKHOLE, &endoff, 0, incred, curthread); /* * Since invp is unlocked, it may be possible for * another thread to do a truncate(), lseek(), write() * creating a hole at startoff between the above * VOP_IOCTL() calls, if the other thread does not do * rangelocking. * If that happens, startoff == endoff and finding * the hole has failed, so set an error. */ if (error == 0 && startoff == endoff) error = EINVAL; /* Any error. Reset to 0. */ } if (error == 0) { if (startoff > *inoffp) { /* Found hole before data block. */ xfer = MIN(startoff - *inoffp, len); if (*outoffp < va.va_size) { /* Must write 0s to punch hole. */ xfer2 = MIN(va.va_size - *outoffp, xfer); memset(dat, 0, MIN(xfer2, blksize)); error = vn_write_outvp(outvp, dat, *outoffp, xfer2, blksize, false, holeout > 0, outcred); } if (error == 0 && *outoffp + xfer > va.va_size && xfer == len) /* Grow last block. */ error = vn_write_outvp(outvp, dat, *outoffp, xfer, blksize, true, false, outcred); if (error == 0) { *inoffp += xfer; *outoffp += xfer; len -= xfer; } } copylen = MIN(len, endoff - startoff); cantseek = false; } else { cantseek = true; startoff = *inoffp; copylen = len; error = 0; } xfer = blksize; if (cantseek) { /* * Set first xfer to end at a block boundary, so that * holes are more likely detected in the loop below via * the for all bytes 0 method. */ xfer -= (*inoffp % blksize); } /* Loop copying the data block. */ while (copylen > 0 && error == 0 && !eof) { if (copylen < xfer) xfer = copylen; error = vn_lock(invp, LK_SHARED); if (error != 0) goto out; error = vn_rdwr(UIO_READ, invp, dat, xfer, startoff, UIO_SYSSPACE, IO_NODELOCKED, curthread->td_ucred, incred, &aresid, curthread); VOP_UNLOCK(invp); lastblock = false; if (error == 0 && aresid > 0) { /* Stop the copy at EOF on the input file. */ xfer -= aresid; eof = true; lastblock = true; } if (error == 0) { /* * Skip the write for holes past the initial EOF * of the output file, unless this is the last * write of the output file at EOF. */ readzeros = cantseek ? mem_iszero(dat, xfer) : false; if (xfer == len) lastblock = true; if (!cantseek || *outoffp < va.va_size || lastblock || !readzeros) error = vn_write_outvp(outvp, dat, *outoffp, xfer, blksize, readzeros && lastblock && *outoffp >= va.va_size, false, outcred); if (error == 0) { *inoffp += xfer; startoff += xfer; *outoffp += xfer; copylen -= xfer; len -= xfer; } } xfer = blksize; } } out: *lenp = savlen - len; free(dat, M_TEMP); return (error); } static int vn_fallocate(struct file *fp, off_t offset, off_t len, struct thread *td) { struct mount *mp; struct vnode *vp; off_t olen, ooffset; int error; #ifdef AUDIT int audited_vnode1 = 0; #endif vp = fp->f_vnode; if (vp->v_type != VREG) return (ENODEV); /* Allocating blocks may take a long time, so iterate. */ for (;;) { olen = len; ooffset = offset; bwillwrite(); mp = NULL; error = vn_start_write(vp, &mp, V_WAIT | PCATCH); if (error != 0) break; error = vn_lock(vp, LK_EXCLUSIVE); if (error != 0) { vn_finished_write(mp); break; } #ifdef AUDIT if (!audited_vnode1) { AUDIT_ARG_VNODE1(vp); audited_vnode1 = 1; } #endif #ifdef MAC error = mac_vnode_check_write(td->td_ucred, fp->f_cred, vp); if (error == 0) #endif error = VOP_ALLOCATE(vp, &offset, &len); VOP_UNLOCK(vp); vn_finished_write(mp); if (olen + ooffset != offset + len) { panic("offset + len changed from %jx/%jx to %jx/%jx", ooffset, olen, offset, len); } if (error != 0 || len == 0) break; KASSERT(olen > len, ("Iteration did not make progress?")); maybe_yield(); } return (error); } diff --git a/sys/kern/vnode_if.src b/sys/kern/vnode_if.src index e5a7b389fb30..10bca613606d 100644 --- a/sys/kern/vnode_if.src +++ b/sys/kern/vnode_if.src @@ -1,789 +1,800 @@ #- # Copyright (c) 1992, 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. # # @(#)vnode_if.src 8.12 (Berkeley) 5/14/95 # $FreeBSD$ # # # Above each of the vop descriptors in lines starting with %% # is a specification of the locking protocol used by each vop call. # The first column is the name of the variable, the remaining three # columns are in, out and error respectively. The "in" column defines # the lock state on input, the "out" column defines the state on successful # return, and the "error" column defines the locking state on error exit. # # The locking value can take the following values: # L: locked; not converted to type of lock. # E: locked with exclusive lock for this process. # U: unlocked. # -: not applicable. vnode does not yet (or no longer) exists. # =: the same on input and output, may be either L or U. # # The paramater named "vpp" is assumed to be always used with double # indirection (**vpp) and that name is hard-coded in vnode_if.awk ! # # Lines starting with %! specify a pre or post-condition function # to call before/after the vop call. # # If other such parameters are introduced, they have to be added to # the AWK script at the head of the definition of "add_debug_code()". # vop_islocked { IN struct vnode *vp; }; %% lookup dvp L L L %% lookup vpp - L - # XXX - the lookup locking protocol defies simple description and depends # on the flags and operation fields in the (cnp) structure. Note # especially that *vpp may equal dvp and both may be locked. vop_lookup { IN struct vnode *dvp; INOUT struct vnode **vpp; IN struct componentname *cnp; }; %% cachedlookup dvp L L L %% cachedlookup vpp - L - # This must be an exact copy of lookup. See kern/vfs_cache.c for details. vop_cachedlookup { IN struct vnode *dvp; INOUT struct vnode **vpp; IN struct componentname *cnp; }; %% create dvp E E E %% create vpp - L - %! create pre vop_create_pre %! create post vop_create_post vop_create { IN struct vnode *dvp; OUT struct vnode **vpp; IN struct componentname *cnp; IN struct vattr *vap; }; %% whiteout dvp E E E %! whiteout pre vop_whiteout_pre %! whiteout post vop_whiteout_post vop_whiteout { IN struct vnode *dvp; IN struct componentname *cnp; IN int flags; }; %% mknod dvp E E E %% mknod vpp - L - %! mknod pre vop_mknod_pre %! mknod post vop_mknod_post vop_mknod { IN struct vnode *dvp; OUT struct vnode **vpp; IN struct componentname *cnp; IN struct vattr *vap; }; %% open vp L L L %! open post vop_open_post vop_open { IN struct vnode *vp; IN int mode; IN struct ucred *cred; IN struct thread *td; IN struct file *fp; }; %% close vp L L L %! close post vop_close_post vop_close { IN struct vnode *vp; IN int fflag; IN struct ucred *cred; IN struct thread *td; }; %% fplookup_vexec vp - - - %! fplookup_vexec debugpre vop_fplookup_vexec_debugpre %! fplookup_vexec debugpost vop_fplookup_vexec_debugpost vop_fplookup_vexec { IN struct vnode *vp; IN struct ucred *cred; IN struct thread *td; }; %% access vp L L L vop_access { IN struct vnode *vp; IN accmode_t accmode; IN struct ucred *cred; IN struct thread *td; }; %% accessx vp L L L vop_accessx { IN struct vnode *vp; IN accmode_t accmode; IN struct ucred *cred; IN struct thread *td; }; +%% stat vp L L L + +vop_stat { + IN struct vnode *vp; + OUT struct stat *sb; + IN struct ucred *active_cred; + IN struct ucred *file_cred; + IN struct thread *td; +}; + + %% getattr vp L L L vop_getattr { IN struct vnode *vp; OUT struct vattr *vap; IN struct ucred *cred; }; %% setattr vp E E E %! setattr pre vop_setattr_pre %! setattr post vop_setattr_post vop_setattr { IN struct vnode *vp; IN struct vattr *vap; IN struct ucred *cred; }; %% mmapped vp L L L vop_mmapped { IN struct vnode *vp; }; %% read vp L L L %! read post vop_read_post vop_read { IN struct vnode *vp; INOUT struct uio *uio; IN int ioflag; IN struct ucred *cred; }; %% write vp L L L %! write pre VOP_WRITE_PRE %! write post VOP_WRITE_POST vop_write { IN struct vnode *vp; INOUT struct uio *uio; IN int ioflag; IN struct ucred *cred; }; %% ioctl vp U U U vop_ioctl { IN struct vnode *vp; IN u_long command; IN void *data; IN int fflag; IN struct ucred *cred; IN struct thread *td; }; %% poll vp U U U vop_poll { IN struct vnode *vp; IN int events; IN struct ucred *cred; IN struct thread *td; }; %% kqfilter vp U U U vop_kqfilter { IN struct vnode *vp; IN struct knote *kn; }; %% revoke vp L L L vop_revoke { IN struct vnode *vp; IN int flags; }; %% fsync vp L L L vop_fsync { IN struct vnode *vp; IN int waitfor; IN struct thread *td; }; %% remove dvp E E E %% remove vp E E E %! remove pre vop_remove_pre %! remove post vop_remove_post vop_remove { IN struct vnode *dvp; IN struct vnode *vp; IN struct componentname *cnp; }; %% link tdvp E E E %% link vp E E E %! link pre vop_link_pre %! link post vop_link_post vop_link { IN struct vnode *tdvp; IN struct vnode *vp; IN struct componentname *cnp; }; %! rename pre vop_rename_pre %! rename post vop_rename_post vop_rename { IN WILLRELE struct vnode *fdvp; IN WILLRELE struct vnode *fvp; IN struct componentname *fcnp; IN WILLRELE struct vnode *tdvp; IN WILLRELE struct vnode *tvp; IN struct componentname *tcnp; }; %% mkdir dvp E E E %% mkdir vpp - E - %! mkdir pre vop_mkdir_pre %! mkdir post vop_mkdir_post vop_mkdir { IN struct vnode *dvp; OUT struct vnode **vpp; IN struct componentname *cnp; IN struct vattr *vap; }; %% rmdir dvp E E E %% rmdir vp E E E %! rmdir pre vop_rmdir_pre %! rmdir post vop_rmdir_post vop_rmdir { IN struct vnode *dvp; IN struct vnode *vp; IN struct componentname *cnp; }; %% symlink dvp E E E %% symlink vpp - E - %! symlink pre vop_symlink_pre %! symlink post vop_symlink_post vop_symlink { IN struct vnode *dvp; OUT struct vnode **vpp; IN struct componentname *cnp; IN struct vattr *vap; IN const char *target; }; %% readdir vp L L L %! readdir post vop_readdir_post vop_readdir { IN struct vnode *vp; INOUT struct uio *uio; IN struct ucred *cred; INOUT int *eofflag; OUT int *ncookies; INOUT u_long **cookies; }; %% readlink vp L L L vop_readlink { IN struct vnode *vp; INOUT struct uio *uio; IN struct ucred *cred; }; %% inactive vp E E E vop_inactive { IN struct vnode *vp; IN struct thread *td; }; %! need_inactive debugpre vop_need_inactive_debugpre %! need_inactive debugpost vop_need_inactive_debugpost vop_need_inactive { IN struct vnode *vp; }; %% reclaim vp E E E %! reclaim post vop_reclaim_post vop_reclaim { IN struct vnode *vp; IN struct thread *td; }; %! lock1 debugpre vop_lock_debugpre %! lock1 debugpost vop_lock_debugpost vop_lock1 { IN struct vnode *vp; IN int flags; IN const char *file; IN int line; }; %! unlock debugpre vop_unlock_debugpre vop_unlock { IN struct vnode *vp; }; %% bmap vp L L L vop_bmap { IN struct vnode *vp; IN daddr_t bn; OUT struct bufobj **bop; IN daddr_t *bnp; OUT int *runp; OUT int *runb; }; %% strategy vp L L L %! strategy debugpre vop_strategy_debugpre vop_strategy { IN struct vnode *vp; IN struct buf *bp; }; %% getwritemount vp = = = vop_getwritemount { IN struct vnode *vp; OUT struct mount **mpp; }; %% print vp - - - vop_print { IN struct vnode *vp; }; %% pathconf vp L L L vop_pathconf { IN struct vnode *vp; IN int name; OUT long *retval; }; %% advlock vp U U U vop_advlock { IN struct vnode *vp; IN void *id; IN int op; IN struct flock *fl; IN int flags; }; %% advlockasync vp U U U vop_advlockasync { IN struct vnode *vp; IN void *id; IN int op; IN struct flock *fl; IN int flags; IN struct task *task; INOUT void **cookiep; }; %% advlockpurge vp E E E vop_advlockpurge { IN struct vnode *vp; }; %% reallocblks vp E E E vop_reallocblks { IN struct vnode *vp; IN struct cluster_save *buflist; }; %% getpages vp L L L vop_getpages { IN struct vnode *vp; IN vm_page_t *m; IN int count; IN int *rbehind; IN int *rahead; }; %% getpages_async vp L L L vop_getpages_async { IN struct vnode *vp; IN vm_page_t *m; IN int count; IN int *rbehind; IN int *rahead; IN vop_getpages_iodone_t *iodone; IN void *arg; }; %% putpages vp L L L vop_putpages { IN struct vnode *vp; IN vm_page_t *m; IN int count; IN int sync; IN int *rtvals; }; %% getacl vp L L L vop_getacl { IN struct vnode *vp; IN acl_type_t type; OUT struct acl *aclp; IN struct ucred *cred; IN struct thread *td; }; %% setacl vp E E E %! setacl pre vop_setacl_pre %! setacl post vop_setacl_post vop_setacl { IN struct vnode *vp; IN acl_type_t type; IN struct acl *aclp; IN struct ucred *cred; IN struct thread *td; }; %% aclcheck vp = = = vop_aclcheck { IN struct vnode *vp; IN acl_type_t type; IN struct acl *aclp; IN struct ucred *cred; IN struct thread *td; }; %% closeextattr vp L L L vop_closeextattr { IN struct vnode *vp; IN int commit; IN struct ucred *cred; IN struct thread *td; }; %% getextattr vp L L L vop_getextattr { IN struct vnode *vp; IN int attrnamespace; IN const char *name; INOUT struct uio *uio; OUT size_t *size; IN struct ucred *cred; IN struct thread *td; }; %% listextattr vp L L L vop_listextattr { IN struct vnode *vp; IN int attrnamespace; INOUT struct uio *uio; OUT size_t *size; IN struct ucred *cred; IN struct thread *td; }; %% openextattr vp L L L vop_openextattr { IN struct vnode *vp; IN struct ucred *cred; IN struct thread *td; }; %% deleteextattr vp E E E %! deleteextattr pre vop_deleteextattr_pre %! deleteextattr post vop_deleteextattr_post vop_deleteextattr { IN struct vnode *vp; IN int attrnamespace; IN const char *name; IN struct ucred *cred; IN struct thread *td; }; %% setextattr vp E E E %! setextattr pre vop_setextattr_pre %! setextattr post vop_setextattr_post vop_setextattr { IN struct vnode *vp; IN int attrnamespace; IN const char *name; INOUT struct uio *uio; IN struct ucred *cred; IN struct thread *td; }; %% setlabel vp E E E vop_setlabel { IN struct vnode *vp; IN struct label *label; IN struct ucred *cred; IN struct thread *td; }; %% vptofh vp = = = vop_vptofh { IN struct vnode *vp; IN struct fid *fhp; }; %% vptocnp vp L L L %% vptocnp vpp - U - vop_vptocnp { IN struct vnode *vp; OUT struct vnode **vpp; IN struct ucred *cred; INOUT char *buf; INOUT size_t *buflen; }; %% allocate vp E E E vop_allocate { IN struct vnode *vp; INOUT off_t *offset; INOUT off_t *len; }; %% advise vp U U U vop_advise { IN struct vnode *vp; IN off_t start; IN off_t end; IN int advice; }; %% unp_bind vp E E E vop_unp_bind { IN struct vnode *vp; IN struct unpcb *unpcb; }; %% unp_connect vp L L L vop_unp_connect { IN struct vnode *vp; OUT struct unpcb **unpcb; }; %% unp_detach vp = = = vop_unp_detach { IN struct vnode *vp; }; %% is_text vp L L L vop_is_text { IN struct vnode *vp; }; %% set_text vp = = = vop_set_text { IN struct vnode *vp; }; %% vop_unset_text vp L L L vop_unset_text { IN struct vnode *vp; }; %% add_writecount vp L L L vop_add_writecount { IN struct vnode *vp; IN int inc; }; %% fdatasync vp L L L vop_fdatasync { IN struct vnode *vp; IN struct thread *td; }; %% copy_file_range invp U U U %% copy_file_range outvp U U U vop_copy_file_range { IN struct vnode *invp; INOUT off_t *inoffp; IN struct vnode *outvp; INOUT off_t *outoffp; INOUT size_t *lenp; IN unsigned int flags; IN struct ucred *incred; IN struct ucred *outcred; IN struct thread *fsizetd; }; # The VOPs below are spares at the end of the table to allow new VOPs to be # added in stable branches without breaking the KBI. New VOPs in HEAD should # be added above these spares. When merging a new VOP to a stable branch, # the new VOP should replace one of the spares. vop_spare1 { IN struct vnode *vp; }; vop_spare2 { IN struct vnode *vp; }; vop_spare3 { IN struct vnode *vp; }; vop_spare4 { IN struct vnode *vp; }; vop_spare5 { IN struct vnode *vp; }; diff --git a/sys/security/audit/audit_arg.c b/sys/security/audit/audit_arg.c index fc5318750e3e..44b17e36c8ea 100644 --- a/sys/security/audit/audit_arg.c +++ b/sys/security/audit/audit_arg.c @@ -1,1021 +1,1021 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1999-2005 Apple Inc. * Copyright (c) 2016-2017 Robert N. M. Watson * All rights reserved. * * Portions of this software were developed by BAE Systems, the University of * Cambridge Computer Laboratory, and Memorial University under DARPA/AFRL * contract FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent * Computing (TC) research program. * * 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 Apple Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 #include #include #include #include #include #include #include #include #include #include /* * Calls to manipulate elements of the audit record structure from system * call code. Macro wrappers will prevent this functions from being entered * if auditing is disabled, avoiding the function call cost. We check the * thread audit record pointer anyway, as the audit condition could change, * and pre-selection may not have allocated an audit record for this event. * * XXXAUDIT: Should we assert, in each case, that this field of the record * hasn't already been filled in? */ void audit_arg_addr(void *addr) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_addr = addr; ARG_SET_VALID(ar, ARG_ADDR); } void audit_arg_exit(int status, int retval) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_exitstatus = status; ar->k_ar.ar_arg_exitretval = retval; ARG_SET_VALID(ar, ARG_EXIT); } void audit_arg_len(int len) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_len = len; ARG_SET_VALID(ar, ARG_LEN); } void audit_arg_atfd1(int atfd) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_atfd1 = atfd; ARG_SET_VALID(ar, ARG_ATFD1); } void audit_arg_atfd2(int atfd) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_atfd2 = atfd; ARG_SET_VALID(ar, ARG_ATFD2); } void audit_arg_fd(int fd) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_fd = fd; ARG_SET_VALID(ar, ARG_FD); } void audit_arg_fflags(int fflags) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_fflags = fflags; ARG_SET_VALID(ar, ARG_FFLAGS); } void audit_arg_gid(gid_t gid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_gid = gid; ARG_SET_VALID(ar, ARG_GID); } void audit_arg_uid(uid_t uid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_uid = uid; ARG_SET_VALID(ar, ARG_UID); } void audit_arg_egid(gid_t egid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_egid = egid; ARG_SET_VALID(ar, ARG_EGID); } void audit_arg_euid(uid_t euid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_euid = euid; ARG_SET_VALID(ar, ARG_EUID); } void audit_arg_rgid(gid_t rgid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_rgid = rgid; ARG_SET_VALID(ar, ARG_RGID); } void audit_arg_ruid(uid_t ruid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_ruid = ruid; ARG_SET_VALID(ar, ARG_RUID); } void audit_arg_sgid(gid_t sgid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_sgid = sgid; ARG_SET_VALID(ar, ARG_SGID); } void audit_arg_suid(uid_t suid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_suid = suid; ARG_SET_VALID(ar, ARG_SUID); } void audit_arg_groupset(gid_t *gidset, u_int gidset_size) { u_int i; struct kaudit_record *ar; KASSERT(gidset_size <= ngroups_max + 1, ("audit_arg_groupset: gidset_size > (kern.ngroups + 1)")); ar = currecord(); if (ar == NULL) return; if (ar->k_ar.ar_arg_groups.gidset == NULL) ar->k_ar.ar_arg_groups.gidset = malloc( sizeof(gid_t) * gidset_size, M_AUDITGIDSET, M_WAITOK); for (i = 0; i < gidset_size; i++) ar->k_ar.ar_arg_groups.gidset[i] = gidset[i]; ar->k_ar.ar_arg_groups.gidset_size = gidset_size; ARG_SET_VALID(ar, ARG_GROUPSET); } void audit_arg_login(char *login) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; strlcpy(ar->k_ar.ar_arg_login, login, MAXLOGNAME); ARG_SET_VALID(ar, ARG_LOGIN); } void audit_arg_ctlname(int *name, int namelen) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; bcopy(name, &ar->k_ar.ar_arg_ctlname, namelen * sizeof(int)); ar->k_ar.ar_arg_len = namelen; ARG_SET_VALID(ar, ARG_CTLNAME | ARG_LEN); } void audit_arg_mask(int mask) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_mask = mask; ARG_SET_VALID(ar, ARG_MASK); } void audit_arg_mode(mode_t mode) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_mode = mode; ARG_SET_VALID(ar, ARG_MODE); } void audit_arg_dev(int dev) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_dev = dev; ARG_SET_VALID(ar, ARG_DEV); } void audit_arg_value(long value) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_value = value; ARG_SET_VALID(ar, ARG_VALUE); } void audit_arg_owner(uid_t uid, gid_t gid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_uid = uid; ar->k_ar.ar_arg_gid = gid; ARG_SET_VALID(ar, ARG_UID | ARG_GID); } void audit_arg_pid(pid_t pid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_pid = pid; ARG_SET_VALID(ar, ARG_PID); } void audit_arg_process(struct proc *p) { struct kaudit_record *ar; struct ucred *cred; KASSERT(p != NULL, ("audit_arg_process: p == NULL")); PROC_LOCK_ASSERT(p, MA_OWNED); ar = currecord(); if (ar == NULL) return; cred = p->p_ucred; ar->k_ar.ar_arg_auid = cred->cr_audit.ai_auid; ar->k_ar.ar_arg_euid = cred->cr_uid; ar->k_ar.ar_arg_egid = cred->cr_groups[0]; ar->k_ar.ar_arg_ruid = cred->cr_ruid; ar->k_ar.ar_arg_rgid = cred->cr_rgid; ar->k_ar.ar_arg_asid = cred->cr_audit.ai_asid; ar->k_ar.ar_arg_termid_addr = cred->cr_audit.ai_termid; ar->k_ar.ar_arg_pid = p->p_pid; ARG_SET_VALID(ar, ARG_AUID | ARG_EUID | ARG_EGID | ARG_RUID | ARG_RGID | ARG_ASID | ARG_TERMID_ADDR | ARG_PID | ARG_PROCESS); } void audit_arg_signum(u_int signum) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_signum = signum; ARG_SET_VALID(ar, ARG_SIGNUM); } void audit_arg_socket(int sodomain, int sotype, int soprotocol) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_sockinfo.so_domain = sodomain; ar->k_ar.ar_arg_sockinfo.so_type = sotype; ar->k_ar.ar_arg_sockinfo.so_protocol = soprotocol; ARG_SET_VALID(ar, ARG_SOCKINFO); } void audit_arg_sockaddr(struct thread *td, int dirfd, struct sockaddr *sa) { struct kaudit_record *ar; KASSERT(td != NULL, ("audit_arg_sockaddr: td == NULL")); KASSERT(sa != NULL, ("audit_arg_sockaddr: sa == NULL")); ar = currecord(); if (ar == NULL) return; bcopy(sa, &ar->k_ar.ar_arg_sockaddr, sa->sa_len); switch (sa->sa_family) { case AF_INET: ARG_SET_VALID(ar, ARG_SADDRINET); break; case AF_INET6: ARG_SET_VALID(ar, ARG_SADDRINET6); break; case AF_UNIX: if (dirfd != AT_FDCWD) audit_arg_atfd1(dirfd); audit_arg_upath1(td, dirfd, ((struct sockaddr_un *)sa)->sun_path); ARG_SET_VALID(ar, ARG_SADDRUNIX); break; /* XXXAUDIT: default:? */ } } void audit_arg_auid(uid_t auid) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_auid = auid; ARG_SET_VALID(ar, ARG_AUID); } void audit_arg_auditinfo(struct auditinfo *au_info) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_auid = au_info->ai_auid; ar->k_ar.ar_arg_asid = au_info->ai_asid; ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success; ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure; ar->k_ar.ar_arg_termid.port = au_info->ai_termid.port; ar->k_ar.ar_arg_termid.machine = au_info->ai_termid.machine; ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID); } void audit_arg_auditinfo_addr(struct auditinfo_addr *au_info) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_auid = au_info->ai_auid; ar->k_ar.ar_arg_asid = au_info->ai_asid; ar->k_ar.ar_arg_amask.am_success = au_info->ai_mask.am_success; ar->k_ar.ar_arg_amask.am_failure = au_info->ai_mask.am_failure; ar->k_ar.ar_arg_termid_addr.at_type = au_info->ai_termid.at_type; ar->k_ar.ar_arg_termid_addr.at_port = au_info->ai_termid.at_port; ar->k_ar.ar_arg_termid_addr.at_addr[0] = au_info->ai_termid.at_addr[0]; ar->k_ar.ar_arg_termid_addr.at_addr[1] = au_info->ai_termid.at_addr[1]; ar->k_ar.ar_arg_termid_addr.at_addr[2] = au_info->ai_termid.at_addr[2]; ar->k_ar.ar_arg_termid_addr.at_addr[3] = au_info->ai_termid.at_addr[3]; ARG_SET_VALID(ar, ARG_AUID | ARG_ASID | ARG_AMASK | ARG_TERMID_ADDR); } void audit_arg_text(const char *text) { struct kaudit_record *ar; KASSERT(text != NULL, ("audit_arg_text: text == NULL")); ar = currecord(); if (ar == NULL) return; /* Invalidate the text string */ ar->k_ar.ar_valid_arg &= (ARG_ALL ^ ARG_TEXT); if (ar->k_ar.ar_arg_text == NULL) ar->k_ar.ar_arg_text = malloc(MAXPATHLEN, M_AUDITTEXT, M_WAITOK); strncpy(ar->k_ar.ar_arg_text, text, MAXPATHLEN); ARG_SET_VALID(ar, ARG_TEXT); } void audit_arg_cmd(int cmd) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_cmd = cmd; ARG_SET_VALID(ar, ARG_CMD); } void audit_arg_svipc_cmd(int cmd) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_svipc_cmd = cmd; ARG_SET_VALID(ar, ARG_SVIPC_CMD); } void audit_arg_svipc_perm(struct ipc_perm *perm) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; bcopy(perm, &ar->k_ar.ar_arg_svipc_perm, sizeof(ar->k_ar.ar_arg_svipc_perm)); ARG_SET_VALID(ar, ARG_SVIPC_PERM); } void audit_arg_svipc_id(int id) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_svipc_id = id; ARG_SET_VALID(ar, ARG_SVIPC_ID); } void audit_arg_svipc_addr(void * addr) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_svipc_addr = addr; ARG_SET_VALID(ar, ARG_SVIPC_ADDR); } void audit_arg_svipc_which(int which) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_svipc_which = which; ARG_SET_VALID(ar, ARG_SVIPC_WHICH); } void audit_arg_posix_ipc_perm(uid_t uid, gid_t gid, mode_t mode) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_pipc_perm.pipc_uid = uid; ar->k_ar.ar_arg_pipc_perm.pipc_gid = gid; ar->k_ar.ar_arg_pipc_perm.pipc_mode = mode; ARG_SET_VALID(ar, ARG_POSIX_IPC_PERM); } void audit_arg_auditon(union auditon_udata *udata) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; bcopy((void *)udata, &ar->k_ar.ar_arg_auditon, sizeof(ar->k_ar.ar_arg_auditon)); ARG_SET_VALID(ar, ARG_AUDITON); } /* * Audit information about a file, either the file's vnode info, or its * socket address info. */ void audit_arg_file(struct proc *p, struct file *fp) { struct kaudit_record *ar; struct socket *so; struct inpcb *pcb; struct vnode *vp; ar = currecord(); if (ar == NULL) return; switch (fp->f_type) { case DTYPE_VNODE: case DTYPE_FIFO: /* * XXXAUDIT: Only possibly to record as first vnode? */ vp = fp->f_vnode; vn_lock(vp, LK_SHARED | LK_RETRY); audit_arg_vnode1(vp); VOP_UNLOCK(vp); break; case DTYPE_SOCKET: so = (struct socket *)fp->f_data; if (INP_CHECK_SOCKAF(so, PF_INET)) { SOCK_LOCK(so); ar->k_ar.ar_arg_sockinfo.so_type = so->so_type; ar->k_ar.ar_arg_sockinfo.so_domain = INP_SOCKAF(so); ar->k_ar.ar_arg_sockinfo.so_protocol = so->so_proto->pr_protocol; SOCK_UNLOCK(so); pcb = (struct inpcb *)so->so_pcb; INP_RLOCK(pcb); ar->k_ar.ar_arg_sockinfo.so_raddr = pcb->inp_faddr.s_addr; ar->k_ar.ar_arg_sockinfo.so_laddr = pcb->inp_laddr.s_addr; ar->k_ar.ar_arg_sockinfo.so_rport = pcb->inp_fport; ar->k_ar.ar_arg_sockinfo.so_lport = pcb->inp_lport; INP_RUNLOCK(pcb); ARG_SET_VALID(ar, ARG_SOCKINFO); } break; default: /* XXXAUDIT: else? */ break; } } /* * Store a path as given by the user process for auditing into the audit * record stored on the user thread. This function will allocate the memory * to store the path info if not already available. This memory will be * freed when the audit record is freed. The path is canonlicalised with * respect to the thread and directory descriptor passed. */ static void audit_arg_upath(struct thread *td, int dirfd, char *upath, char **pathp) { if (*pathp == NULL) *pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK); audit_canon_path(td, dirfd, upath, *pathp); } void audit_arg_upath1(struct thread *td, int dirfd, char *upath) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; audit_arg_upath(td, dirfd, upath, &ar->k_ar.ar_arg_upath1); ARG_SET_VALID(ar, ARG_UPATH1); } void audit_arg_upath2(struct thread *td, int dirfd, char *upath) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; audit_arg_upath(td, dirfd, upath, &ar->k_ar.ar_arg_upath2); ARG_SET_VALID(ar, ARG_UPATH2); } static void audit_arg_upath_vp(struct thread *td, struct vnode *rdir, struct vnode *cdir, char *upath, char **pathp) { if (*pathp == NULL) *pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK); audit_canon_path_vp(td, rdir, cdir, upath, *pathp); } void audit_arg_upath1_vp(struct thread *td, struct vnode *rdir, struct vnode *cdir, char *upath) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; audit_arg_upath_vp(td, rdir, cdir, upath, &ar->k_ar.ar_arg_upath1); ARG_SET_VALID(ar, ARG_UPATH1); } void audit_arg_upath2_vp(struct thread *td, struct vnode *rdir, struct vnode *cdir, char *upath) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; audit_arg_upath_vp(td, rdir, cdir, upath, &ar->k_ar.ar_arg_upath2); ARG_SET_VALID(ar, ARG_UPATH2); } /* * Variants on path auditing that do not canonicalise the path passed in; * these are for use with filesystem-like subsystems that employ string names, * but do not support a hierarchical namespace -- for example, POSIX IPC * objects. The subsystem should have performed any necessary * canonicalisation required to make the paths useful to audit analysis. */ static void audit_arg_upath_canon(char *upath, char **pathp) { if (*pathp == NULL) *pathp = malloc(MAXPATHLEN, M_AUDITPATH, M_WAITOK); (void)snprintf(*pathp, MAXPATHLEN, "%s", upath); } void audit_arg_upath1_canon(char *upath) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; audit_arg_upath_canon(upath, &ar->k_ar.ar_arg_upath1); ARG_SET_VALID(ar, ARG_UPATH1); } void audit_arg_upath2_canon(char *upath) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; audit_arg_upath_canon(upath, &ar->k_ar.ar_arg_upath2); ARG_SET_VALID(ar, ARG_UPATH2); } /* * Function to save the path and vnode attr information into the audit * record. * * It is assumed that the caller will hold any vnode locks necessary to * perform a VOP_GETATTR() on the passed vnode. * - * XXX: The attr code is very similar to vfs_vnops.c:vn_stat(), but always + * XXX: The attr code is very similar to vfs_default.c:vop_stdstat(), but always * provides access to the generation number as we need that to construct the * BSM file ID. * * XXX: We should accept the process argument from the caller, since it's * very likely they already have a reference. * * XXX: Error handling in this function is poor. * * XXXAUDIT: Possibly KASSERT the path pointer is NULL? */ static int audit_arg_vnode(struct vnode *vp, struct vnode_au_info *vnp) { struct vattr vattr; int error; ASSERT_VOP_LOCKED(vp, "audit_arg_vnode"); error = VOP_GETATTR(vp, &vattr, curthread->td_ucred); if (error) { /* XXX: How to handle this case? */ return (error); } vnp->vn_mode = vattr.va_mode; vnp->vn_uid = vattr.va_uid; vnp->vn_gid = vattr.va_gid; vnp->vn_dev = vattr.va_rdev; vnp->vn_fsid = vattr.va_fsid; vnp->vn_fileid = vattr.va_fileid; vnp->vn_gen = vattr.va_gen; return (0); } void audit_arg_vnode1(struct vnode *vp) { struct kaudit_record *ar; int error; ar = currecord(); if (ar == NULL) return; ARG_CLEAR_VALID(ar, ARG_VNODE1); error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode1); if (error == 0) ARG_SET_VALID(ar, ARG_VNODE1); } void audit_arg_vnode2(struct vnode *vp) { struct kaudit_record *ar; int error; ar = currecord(); if (ar == NULL) return; ARG_CLEAR_VALID(ar, ARG_VNODE2); error = audit_arg_vnode(vp, &ar->k_ar.ar_arg_vnode2); if (error == 0) ARG_SET_VALID(ar, ARG_VNODE2); } /* * Audit the argument strings passed to exec. */ void audit_arg_argv(char *argv, int argc, int length) { struct kaudit_record *ar; if (audit_argv == 0) return; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_argv = malloc(length, M_AUDITTEXT, M_WAITOK); bcopy(argv, ar->k_ar.ar_arg_argv, length); ar->k_ar.ar_arg_argc = argc; ARG_SET_VALID(ar, ARG_ARGV); } /* * Audit the environment strings passed to exec. */ void audit_arg_envv(char *envv, int envc, int length) { struct kaudit_record *ar; if (audit_arge == 0) return; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_envv = malloc(length, M_AUDITTEXT, M_WAITOK); bcopy(envv, ar->k_ar.ar_arg_envv, length); ar->k_ar.ar_arg_envc = envc; ARG_SET_VALID(ar, ARG_ENVV); } void audit_arg_rights(cap_rights_t *rightsp) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_rights = *rightsp; ARG_SET_VALID(ar, ARG_RIGHTS); } void audit_arg_fcntl_rights(uint32_t fcntlrights) { struct kaudit_record *ar; ar = currecord(); if (ar == NULL) return; ar->k_ar.ar_arg_fcntl_rights = fcntlrights; ARG_SET_VALID(ar, ARG_FCNTL_RIGHTS); } /* * The close() system call uses it's own audit call to capture the path/vnode * information because those pieces are not easily obtained within the system * call itself. */ void audit_sysclose(struct thread *td, int fd) { cap_rights_t rights; struct kaudit_record *ar; struct vnode *vp; struct file *fp; KASSERT(td != NULL, ("audit_sysclose: td == NULL")); ar = currecord(); if (ar == NULL) return; audit_arg_fd(fd); if (getvnode(td, fd, cap_rights_init(&rights), &fp) != 0) return; vp = fp->f_vnode; vn_lock(vp, LK_SHARED | LK_RETRY); audit_arg_vnode1(vp); VOP_UNLOCK(vp); fdrop(fp, td); } diff --git a/sys/sys/vnode.h b/sys/sys/vnode.h index 5d9e3496d12e..87c01a962064 100644 --- a/sys/sys/vnode.h +++ b/sys/sys/vnode.h @@ -1,1053 +1,1067 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1989, 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. * * @(#)vnode.h 8.7 (Berkeley) 2/4/94 * $FreeBSD$ */ #ifndef _SYS_VNODE_H_ #define _SYS_VNODE_H_ #include #include #include #include #include #include #include #include #include #include #include /* * The vnode is the focus of all file activity in UNIX. There is a * unique vnode allocated for each active file, each current directory, * each mounted-on file, text file, and the root. */ /* * Vnode types. VNON means no type. */ enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD, VMARKER }; enum vgetstate { VGET_NONE, VGET_HOLDCNT, VGET_USECOUNT }; /* * Each underlying filesystem allocates its own private area and hangs * it from v_data. If non-null, this area is freed in getnewvnode(). */ struct namecache; struct vpollinfo { struct mtx vpi_lock; /* lock to protect below */ struct selinfo vpi_selinfo; /* identity of poller(s) */ short vpi_events; /* what they are looking for */ short vpi_revents; /* what has happened */ }; /* * Reading or writing any of these items requires holding the appropriate lock. * * Lock reference: * c - namecache mutex * i - interlock * l - mp mnt_listmtx or freelist mutex * I - updated with atomics, 0->1 and 1->0 transitions with interlock held * m - mount point interlock * p - pollinfo lock * u - Only a reference to the vnode is needed to read. * v - vnode lock * * Vnodes may be found on many lists. The general way to deal with operating * on a vnode that is on a list is: * 1) Lock the list and find the vnode. * 2) Lock interlock so that the vnode does not go away. * 3) Unlock the list to avoid lock order reversals. * 4) vget with LK_INTERLOCK and check for ENOENT, or * 5) Check for DOOMED if the vnode lock is not required. * 6) Perform your operation, then vput(). */ #if defined(_KERNEL) || defined(_KVM_VNODE) struct vnode { /* * Fields which define the identity of the vnode. These fields are * owned by the filesystem (XXX: and vgone() ?) */ enum vtype v_type:8; /* u vnode type */ short v_irflag; /* i frequently read flags */ seqc_t v_seqc; /* i modification count */ uint32_t v_nchash; /* u namecache hash */ struct vop_vector *v_op; /* u vnode operations vector */ void *v_data; /* u private data for fs */ /* * Filesystem instance stuff */ struct mount *v_mount; /* u ptr to vfs we are in */ TAILQ_ENTRY(vnode) v_nmntvnodes; /* m vnodes for mount point */ /* * Type specific fields, only one applies to any given vnode. */ union { struct mount *v_mountedhere; /* v ptr to mountpoint (VDIR) */ struct unpcb *v_unpcb; /* v unix domain net (VSOCK) */ struct cdev *v_rdev; /* v device (VCHR, VBLK) */ struct fifoinfo *v_fifoinfo; /* v fifo (VFIFO) */ }; /* * vfs_hash: (mount + inode) -> vnode hash. The hash value * itself is grouped with other int fields, to avoid padding. */ LIST_ENTRY(vnode) v_hashlist; /* * VFS_namecache stuff */ LIST_HEAD(, namecache) v_cache_src; /* c Cache entries from us */ TAILQ_HEAD(, namecache) v_cache_dst; /* c Cache entries to us */ struct namecache *v_cache_dd; /* c Cache entry for .. vnode */ /* * Locking */ struct lock v_lock; /* u (if fs don't have one) */ struct mtx v_interlock; /* lock for "i" things */ struct lock *v_vnlock; /* u pointer to vnode lock */ /* * The machinery of being a vnode */ TAILQ_ENTRY(vnode) v_vnodelist; /* l vnode lists */ TAILQ_ENTRY(vnode) v_lazylist; /* l vnode lazy list */ struct bufobj v_bufobj; /* * Buffer cache object */ /* * Hooks for various subsystems and features. */ struct vpollinfo *v_pollinfo; /* i Poll events, p for *v_pi */ struct label *v_label; /* MAC label for vnode */ struct lockf *v_lockf; /* Byte-level advisory lock list */ struct rangelock v_rl; /* Byte-range lock */ /* * clustering stuff */ daddr_t v_cstart; /* v start block of cluster */ daddr_t v_lasta; /* v last allocation */ daddr_t v_lastw; /* v last write */ int v_clen; /* v length of cur. cluster */ u_int v_holdcnt; /* I prevents recycling. */ u_int v_usecount; /* I ref count of users */ u_short v_iflag; /* i vnode flags (see below) */ u_short v_vflag; /* v vnode flags */ u_short v_mflag; /* l mnt-specific vnode flags */ short v_dbatchcpu; /* i LRU requeue deferral batch */ int v_writecount; /* I ref count of writers or (negative) text users */ int v_seqc_users; /* i modifications pending */ u_int v_hash; }; #endif /* defined(_KERNEL) || defined(_KVM_VNODE) */ #define bo2vnode(bo) __containerof((bo), struct vnode, v_bufobj) /* XXX: These are temporary to avoid a source sweep at this time */ #define v_object v_bufobj.bo_object /* * Userland version of struct vnode, for sysctl. */ struct xvnode { size_t xv_size; /* sizeof(struct xvnode) */ void *xv_vnode; /* address of real vnode */ u_long xv_flag; /* vnode vflags */ int xv_usecount; /* reference count of users */ int xv_writecount; /* reference count of writers */ int xv_holdcnt; /* page & buffer references */ u_long xv_id; /* capability identifier */ void *xv_mount; /* address of parent mount */ long xv_numoutput; /* num of writes in progress */ enum vtype xv_type; /* vnode type */ union { void *xvu_socket; /* unpcb, if VSOCK */ void *xvu_fifo; /* fifo, if VFIFO */ dev_t xvu_rdev; /* maj/min, if VBLK/VCHR */ struct { dev_t xvu_dev; /* device, if VDIR/VREG/VLNK */ ino_t xvu_ino; /* id, if VDIR/VREG/VLNK */ } xv_uns; } xv_un; }; #define xv_socket xv_un.xvu_socket #define xv_fifo xv_un.xvu_fifo #define xv_rdev xv_un.xvu_rdev #define xv_dev xv_un.xv_uns.xvu_dev #define xv_ino xv_un.xv_uns.xvu_ino /* We don't need to lock the knlist */ #define VN_KNLIST_EMPTY(vp) ((vp)->v_pollinfo == NULL || \ KNLIST_EMPTY(&(vp)->v_pollinfo->vpi_selinfo.si_note)) #define VN_KNOTE(vp, b, a) \ do { \ if (!VN_KNLIST_EMPTY(vp)) \ KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b), \ (a) | KNF_NOKQLOCK); \ } while (0) #define VN_KNOTE_LOCKED(vp, b) VN_KNOTE(vp, b, KNF_LISTLOCKED) #define VN_KNOTE_UNLOCKED(vp, b) VN_KNOTE(vp, b, 0) /* * Vnode flags. * VI flags are protected by interlock and live in v_iflag * VV flags are protected by the vnode lock and live in v_vflag * * VIRF_DOOMED is doubly protected by the interlock and vnode lock. Both * are required for writing but the status may be checked with either. */ #define VHOLD_NO_SMR (1<<29) /* Disable vhold_smr */ #define VHOLD_ALL_FLAGS (VHOLD_NO_SMR) #define VIRF_DOOMED 0x0001 /* This vnode is being recycled */ #define VI_TEXT_REF 0x0001 /* Text ref grabbed use ref */ #define VI_MOUNT 0x0002 /* Mount in progress */ #define VI_DOINGINACT 0x0004 /* VOP_INACTIVE is in progress */ #define VI_OWEINACT 0x0008 /* Need to call inactive */ #define VI_DEFINACT 0x0010 /* deferred inactive */ #define VV_ROOT 0x0001 /* root of its filesystem */ #define VV_ISTTY 0x0002 /* vnode represents a tty */ #define VV_NOSYNC 0x0004 /* unlinked, stop syncing */ #define VV_ETERNALDEV 0x0008 /* device that is never destroyed */ #define VV_CACHEDLABEL 0x0010 /* Vnode has valid cached MAC label */ #define VV_VMSIZEVNLOCK 0x0020 /* object size check requires vnode lock */ #define VV_COPYONWRITE 0x0040 /* vnode is doing copy-on-write */ #define VV_SYSTEM 0x0080 /* vnode being used by kernel */ #define VV_PROCDEP 0x0100 /* vnode is process dependent */ #define VV_NOKNOTE 0x0200 /* don't activate knotes on this vnode */ #define VV_DELETED 0x0400 /* should be removed */ #define VV_MD 0x0800 /* vnode backs the md device */ #define VV_FORCEINSMQ 0x1000 /* force the insmntque to succeed */ #define VV_READLINK 0x2000 /* fdescfs linux vnode */ #define VMP_LAZYLIST 0x0001 /* Vnode is on mnt's lazy list */ /* * Vnode attributes. A field value of VNOVAL represents a field whose value * is unavailable (getattr) or which is not to be changed (setattr). */ struct vattr { enum vtype va_type; /* vnode type (for create) */ u_short va_mode; /* files access mode and type */ u_short va_padding0; uid_t va_uid; /* owner user id */ gid_t va_gid; /* owner group id */ nlink_t va_nlink; /* number of references to file */ dev_t va_fsid; /* filesystem id */ ino_t va_fileid; /* file id */ u_quad_t va_size; /* file size in bytes */ long va_blocksize; /* blocksize preferred for i/o */ struct timespec va_atime; /* time of last access */ struct timespec va_mtime; /* time of last modification */ struct timespec va_ctime; /* time file changed */ struct timespec va_birthtime; /* time file created */ u_long va_gen; /* generation number of file */ u_long va_flags; /* flags defined for file */ dev_t va_rdev; /* device the special file represents */ u_quad_t va_bytes; /* bytes of disk space held by file */ u_quad_t va_filerev; /* file modification number */ u_int va_vaflags; /* operations flags, see below */ long va_spare; /* remain quad aligned */ }; /* * Flags for va_vaflags. */ #define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ #define VA_EXCLUSIVE 0x02 /* exclusive create request */ #define VA_SYNC 0x04 /* O_SYNC truncation */ /* * Flags for ioflag. (high 16 bits used to ask for read-ahead and * help with write clustering) * NB: IO_NDELAY and IO_DIRECT are linked to fcntl.h */ #define IO_UNIT 0x0001 /* do I/O as atomic unit */ #define IO_APPEND 0x0002 /* append write to end */ #define IO_NDELAY 0x0004 /* FNDELAY flag set in file table */ #define IO_NODELOCKED 0x0008 /* underlying node already locked */ #define IO_ASYNC 0x0010 /* bawrite rather then bdwrite */ #define IO_VMIO 0x0020 /* data already in VMIO space */ #define IO_INVAL 0x0040 /* invalidate after I/O */ #define IO_SYNC 0x0080 /* do I/O synchronously */ #define IO_DIRECT 0x0100 /* attempt to bypass buffer cache */ #define IO_NOREUSE 0x0200 /* VMIO data won't be reused */ #define IO_EXT 0x0400 /* operate on external attributes */ #define IO_NORMAL 0x0800 /* operate on regular data */ #define IO_NOMACCHECK 0x1000 /* MAC checks unnecessary */ #define IO_BUFLOCKED 0x2000 /* ffs flag; indir buf is locked */ #define IO_RANGELOCKED 0x4000 /* range locked */ #define IO_SEQMAX 0x7F /* seq heuristic max value */ #define IO_SEQSHIFT 16 /* seq heuristic in upper 16 bits */ /* * Flags for accmode_t. */ #define VEXEC 000000000100 /* execute/search permission */ #define VWRITE 000000000200 /* write permission */ #define VREAD 000000000400 /* read permission */ #define VADMIN 000000010000 /* being the file owner */ #define VAPPEND 000000040000 /* permission to write/append */ /* * VEXPLICIT_DENY makes VOP_ACCESSX(9) return EPERM or EACCES only * if permission was denied explicitly, by a "deny" rule in NFSv4 ACL, * and 0 otherwise. This never happens with ordinary unix access rights * or POSIX.1e ACLs. Obviously, VEXPLICIT_DENY must be OR-ed with * some other V* constant. */ #define VEXPLICIT_DENY 000000100000 #define VREAD_NAMED_ATTRS 000000200000 /* not used */ #define VWRITE_NAMED_ATTRS 000000400000 /* not used */ #define VDELETE_CHILD 000001000000 #define VREAD_ATTRIBUTES 000002000000 /* permission to stat(2) */ #define VWRITE_ATTRIBUTES 000004000000 /* change {m,c,a}time */ #define VDELETE 000010000000 #define VREAD_ACL 000020000000 /* read ACL and file mode */ #define VWRITE_ACL 000040000000 /* change ACL and/or file mode */ #define VWRITE_OWNER 000100000000 /* change file owner */ #define VSYNCHRONIZE 000200000000 /* not used */ #define VCREAT 000400000000 /* creating new file */ #define VVERIFY 001000000000 /* verification required */ /* * Permissions that were traditionally granted only to the file owner. */ #define VADMIN_PERMS (VADMIN | VWRITE_ATTRIBUTES | VWRITE_ACL | \ VWRITE_OWNER) /* * Permissions that were traditionally granted to everyone. */ #define VSTAT_PERMS (VREAD_ATTRIBUTES | VREAD_ACL) /* * Permissions that allow to change the state of the file in any way. */ #define VMODIFY_PERMS (VWRITE | VAPPEND | VADMIN_PERMS | VDELETE_CHILD | \ VDELETE) /* * Token indicating no attribute value yet assigned. */ #define VNOVAL (-1) /* * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon) */ #define VLKTIMEOUT (hz / 20 + 1) #ifdef _KERNEL #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_VNODE); #endif extern u_int ncsizefactor; /* * Convert between vnode types and inode formats (since POSIX.1 * defines mode word of stat structure in terms of inode formats). */ extern enum vtype iftovt_tab[]; extern int vttoif_tab[]; #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) /* * Flags to various vnode functions. */ #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ #define FORCECLOSE 0x0002 /* vflush: force file closure */ #define WRITECLOSE 0x0004 /* vflush: only close writable files */ #define EARLYFLUSH 0x0008 /* vflush: early call for ffs_flushfiles */ #define V_SAVE 0x0001 /* vinvalbuf: sync file first */ #define V_ALT 0x0002 /* vinvalbuf: invalidate only alternate bufs */ #define V_NORMAL 0x0004 /* vinvalbuf: invalidate only regular bufs */ #define V_CLEANONLY 0x0008 /* vinvalbuf: invalidate only clean bufs */ #define V_VMIO 0x0010 /* vinvalbuf: called during pageout */ #define V_ALLOWCLEAN 0x0020 /* vinvalbuf: allow clean buffers after flush */ #define REVOKEALL 0x0001 /* vop_revoke: revoke all aliases */ #define V_WAIT 0x0001 /* vn_start_write: sleep for suspend */ #define V_NOWAIT 0x0002 /* vn_start_write: don't sleep for suspend */ #define V_XSLEEP 0x0004 /* vn_start_write: just return after sleep */ #define V_MNTREF 0x0010 /* vn_start_write: mp is already ref-ed */ #define VR_START_WRITE 0x0001 /* vfs_write_resume: start write atomically */ #define VR_NO_SUSPCLR 0x0002 /* vfs_write_resume: do not clear suspension */ #define VS_SKIP_UNMOUNT 0x0001 /* vfs_write_suspend: fail if the filesystem is being unmounted */ #define VREF(vp) vref(vp) #ifdef DIAGNOSTIC #define VATTR_NULL(vap) vattr_null(vap) #else #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ #endif /* DIAGNOSTIC */ #define NULLVP ((struct vnode *)NULL) /* * Global vnode data. */ extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ extern struct mount *rootdevmp; /* "/dev" mount */ extern u_long desiredvnodes; /* number of vnodes desired */ extern struct uma_zone *namei_zone; extern struct vattr va_null; /* predefined null vattr structure */ #define VI_LOCK(vp) mtx_lock(&(vp)->v_interlock) #define VI_LOCK_FLAGS(vp, flags) mtx_lock_flags(&(vp)->v_interlock, (flags)) #define VI_TRYLOCK(vp) mtx_trylock(&(vp)->v_interlock) #define VI_UNLOCK(vp) mtx_unlock(&(vp)->v_interlock) #define VI_MTX(vp) (&(vp)->v_interlock) #define VN_LOCK_AREC(vp) lockallowrecurse((vp)->v_vnlock) #define VN_LOCK_ASHARE(vp) lockallowshare((vp)->v_vnlock) #define VN_LOCK_DSHARE(vp) lockdisableshare((vp)->v_vnlock) #endif /* _KERNEL */ /* * Mods for extensibility. */ /* * Flags for vdesc_flags: */ #define VDESC_MAX_VPS 16 /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ #define VDESC_VP0_WILLRELE 0x0001 #define VDESC_VP1_WILLRELE 0x0002 #define VDESC_VP2_WILLRELE 0x0004 #define VDESC_VP3_WILLRELE 0x0008 /* * A generic structure. * This can be used by bypass routines to identify generic arguments. */ struct vop_generic_args { struct vnodeop_desc *a_desc; /* other random data follows, presumably */ }; typedef int vop_bypass_t(struct vop_generic_args *); /* * VDESC_NO_OFFSET is used to identify the end of the offset list * and in places where no such field exists. */ #define VDESC_NO_OFFSET -1 /* * This structure describes the vnode operation taking place. */ struct vnodeop_desc { char *vdesc_name; /* a readable name for debugging */ int vdesc_flags; /* VDESC_* flags */ int vdesc_vop_offset; vop_bypass_t *vdesc_call; /* Function to call */ /* * These ops are used by bypass routines to map and locate arguments. * Creds and procs are not needed in bypass routines, but sometimes * they are useful to (for example) transport layers. * Nameidata is useful because it has a cred in it. */ int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ int vdesc_vpp_offset; /* return vpp location */ int vdesc_cred_offset; /* cred location, if any */ int vdesc_thread_offset; /* thread location, if any */ int vdesc_componentname_offset; /* if any */ }; #ifdef _KERNEL /* * A list of all the operation descs. */ extern struct vnodeop_desc *vnodeop_descs[]; #define VOPARG_OFFSETOF(s_type, field) __offsetof(s_type, field) #define VOPARG_OFFSETTO(s_type, s_offset, struct_p) \ ((s_type)(((char*)(struct_p)) + (s_offset))) #ifdef DEBUG_VFS_LOCKS /* * Support code to aid in debugging VFS locking problems. Not totally * reliable since if the thread sleeps between changing the lock * state and checking it with the assert, some other thread could * change the state. They are good enough for debugging a single * filesystem using a single-threaded test. Note that the unreliability is * limited to false negatives; efforts were made to ensure that false * positives cannot occur. */ void assert_vi_locked(struct vnode *vp, const char *str); void assert_vi_unlocked(struct vnode *vp, const char *str); void assert_vop_elocked(struct vnode *vp, const char *str); void assert_vop_locked(struct vnode *vp, const char *str); void assert_vop_unlocked(struct vnode *vp, const char *str); #define ASSERT_VI_LOCKED(vp, str) assert_vi_locked((vp), (str)) #define ASSERT_VI_UNLOCKED(vp, str) assert_vi_unlocked((vp), (str)) #define ASSERT_VOP_ELOCKED(vp, str) assert_vop_elocked((vp), (str)) #define ASSERT_VOP_LOCKED(vp, str) assert_vop_locked((vp), (str)) #define ASSERT_VOP_UNLOCKED(vp, str) assert_vop_unlocked((vp), (str)) #define ASSERT_VOP_IN_SEQC(vp) do { \ struct vnode *_vp = (vp); \ \ VNPASS(seqc_in_modify(_vp->v_seqc), _vp); \ } while (0) #define ASSERT_VOP_NOT_IN_SEQC(vp) do { \ struct vnode *_vp = (vp); \ \ VNPASS(!seqc_in_modify(_vp->v_seqc), _vp); \ } while (0) #else /* !DEBUG_VFS_LOCKS */ #define ASSERT_VI_LOCKED(vp, str) ((void)0) #define ASSERT_VI_UNLOCKED(vp, str) ((void)0) #define ASSERT_VOP_ELOCKED(vp, str) ((void)0) #define ASSERT_VOP_LOCKED(vp, str) ((void)0) #define ASSERT_VOP_UNLOCKED(vp, str) ((void)0) #define ASSERT_VOP_IN_SEQC(vp) ((void)0) #define ASSERT_VOP_NOT_IN_SEQC(vp) ((void)0) #endif /* DEBUG_VFS_LOCKS */ /* * This call works for vnodes in the kernel. */ #define VCALL(c) ((c)->a_desc->vdesc_call(c)) #define DOINGASYNC(vp) \ (((vp)->v_mount->mnt_kern_flag & MNTK_ASYNC) != 0 && \ ((curthread->td_pflags & TDP_SYNCIO) == 0)) /* * VMIO support inline */ extern int vmiodirenable; static __inline int vn_canvmio(struct vnode *vp) { if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR))) return(TRUE); return(FALSE); } /* * Finally, include the default set of vnode operations. */ typedef void vop_getpages_iodone_t(void *, vm_page_t *, int, int); #include "vnode_if.h" /* vn_open_flags */ #define VN_OPEN_NOAUDIT 0x00000001 #define VN_OPEN_NOCAPCHECK 0x00000002 #define VN_OPEN_NAMECACHE 0x00000004 #define VN_OPEN_INVFS 0x00000008 /* * Public vnode manipulation functions. */ struct componentname; struct file; struct mount; struct nameidata; struct ostat; struct freebsd11_stat; struct thread; struct proc; struct stat; struct nstat; struct ucred; struct uio; struct vattr; struct vfsops; struct vnode; typedef int (*vn_get_ino_t)(struct mount *, void *, int, struct vnode **); int bnoreuselist(struct bufv *bufv, struct bufobj *bo, daddr_t startn, daddr_t endn); /* cache_* may belong in namei.h. */ void cache_changesize(u_long newhashsize); #define cache_enter(dvp, vp, cnp) \ cache_enter_time(dvp, vp, cnp, NULL, NULL) void cache_enter_time(struct vnode *dvp, struct vnode *vp, struct componentname *cnp, struct timespec *tsp, struct timespec *dtsp); int cache_lookup(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, struct timespec *tsp, int *ticksp); void cache_vnode_init(struct vnode *vp); void cache_purge(struct vnode *vp); void cache_purge_vgone(struct vnode *vp); void cache_purge_negative(struct vnode *vp); void cache_purgevfs(struct mount *mp, bool force); int change_dir(struct vnode *vp, struct thread *td); void cvtstat(struct stat *st, struct ostat *ost); void freebsd11_cvtnstat(struct stat *sb, struct nstat *nsb); int freebsd11_cvtstat(struct stat *st, struct freebsd11_stat *ost); int getnewvnode(const char *tag, struct mount *mp, struct vop_vector *vops, struct vnode **vpp); void getnewvnode_reserve(void); void getnewvnode_drop_reserve(void); int insmntque1(struct vnode *vp, struct mount *mp, void (*dtr)(struct vnode *, void *), void *dtr_arg); int insmntque(struct vnode *vp, struct mount *mp); u_quad_t init_va_filerev(void); int speedup_syncer(void); int vn_vptocnp(struct vnode **vp, struct ucred *cred, char *buf, size_t *buflen); int vn_getcwd(struct thread *td, char *buf, char **retbuf, size_t *buflen); int vn_fullpath(struct thread *td, struct vnode *vn, char **retbuf, char **freebuf); int vn_fullpath_global(struct thread *td, struct vnode *vn, char **retbuf, char **freebuf); struct vnode * vn_dir_dd_ino(struct vnode *vp); int vn_commname(struct vnode *vn, char *buf, u_int buflen); int vn_path_to_global_path(struct thread *td, struct vnode *vp, char *path, u_int pathlen); int vaccess(enum vtype type, mode_t file_mode, uid_t file_uid, gid_t file_gid, accmode_t accmode, struct ucred *cred); int vaccess_vexec_smr(mode_t file_mode, uid_t file_uid, gid_t file_gid, struct ucred *cred); int vaccess_acl_nfs4(enum vtype type, uid_t file_uid, gid_t file_gid, struct acl *aclp, accmode_t accmode, struct ucred *cred); int vaccess_acl_posix1e(enum vtype type, uid_t file_uid, gid_t file_gid, struct acl *acl, accmode_t accmode, struct ucred *cred); void vattr_null(struct vattr *vap); int vcount(struct vnode *vp); void vlazy(struct vnode *); void vdrop(struct vnode *); void vdropl(struct vnode *); int vflush(struct mount *mp, int rootrefs, int flags, struct thread *td); int vget(struct vnode *vp, int flags, struct thread *td); enum vgetstate vget_prep_smr(struct vnode *vp); enum vgetstate vget_prep(struct vnode *vp); int vget_finish(struct vnode *vp, int flags, enum vgetstate vs); void vget_finish_ref(struct vnode *vp, enum vgetstate vs); void vget_abort(struct vnode *vp, enum vgetstate vs); void vgone(struct vnode *vp); void vhold(struct vnode *); void vholdl(struct vnode *); void vholdnz(struct vnode *); bool vhold_smr(struct vnode *); void vinactive(struct vnode *vp); int vinvalbuf(struct vnode *vp, int save, int slpflag, int slptimeo); int vtruncbuf(struct vnode *vp, off_t length, int blksize); void v_inval_buf_range(struct vnode *vp, daddr_t startlbn, daddr_t endlbn, int blksize); void vunref(struct vnode *); void vn_printf(struct vnode *vp, const char *fmt, ...) __printflike(2,3); int vrecycle(struct vnode *vp); int vrecyclel(struct vnode *vp); int vn_bmap_seekhole(struct vnode *vp, u_long cmd, off_t *off, struct ucred *cred); int vn_close(struct vnode *vp, int flags, struct ucred *file_cred, struct thread *td); int vn_copy_file_range(struct vnode *invp, off_t *inoffp, struct vnode *outvp, off_t *outoffp, size_t *lenp, unsigned int flags, struct ucred *incred, struct ucred *outcred, struct thread *fsize_td); void vn_finished_write(struct mount *mp); void vn_finished_secondary_write(struct mount *mp); int vn_fsync_buf(struct vnode *vp, int waitfor); int vn_generic_copy_file_range(struct vnode *invp, off_t *inoffp, struct vnode *outvp, off_t *outoffp, size_t *lenp, unsigned int flags, struct ucred *incred, struct ucred *outcred, struct thread *fsize_td); int vn_need_pageq_flush(struct vnode *vp); int vn_isdisk(struct vnode *vp, int *errp); int _vn_lock(struct vnode *vp, int flags, const char *file, int line); #define vn_lock(vp, flags) _vn_lock(vp, flags, __FILE__, __LINE__) int vn_open(struct nameidata *ndp, int *flagp, int cmode, struct file *fp); int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode, u_int vn_open_flags, struct ucred *cred, struct file *fp); int vn_open_vnode(struct vnode *vp, int fmode, struct ucred *cred, struct thread *td, struct file *fp); void vn_pages_remove(struct vnode *vp, vm_pindex_t start, vm_pindex_t end); int vn_pollrecord(struct vnode *vp, struct thread *p, int events); int vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base, int len, off_t offset, enum uio_seg segflg, int ioflg, struct ucred *active_cred, struct ucred *file_cred, ssize_t *aresid, struct thread *td); int vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, void *base, size_t len, off_t offset, enum uio_seg segflg, int ioflg, struct ucred *active_cred, struct ucred *file_cred, size_t *aresid, struct thread *td); int vn_rlimit_fsize(const struct vnode *vn, const struct uio *uio, struct thread *td); -int vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred, - struct ucred *file_cred, struct thread *td); int vn_start_write(struct vnode *vp, struct mount **mpp, int flags); int vn_start_secondary_write(struct vnode *vp, struct mount **mpp, int flags); int vn_truncate_locked(struct vnode *vp, off_t length, bool sync, struct ucred *cred); int vn_writechk(struct vnode *vp); int vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace, const char *attrname, int *buflen, char *buf, struct thread *td); int vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace, const char *attrname, int buflen, char *buf, struct thread *td); int vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace, const char *attrname, struct thread *td); int vn_vget_ino(struct vnode *vp, ino_t ino, int lkflags, struct vnode **rvp); int vn_vget_ino_gen(struct vnode *vp, vn_get_ino_t alloc, void *alloc_arg, int lkflags, struct vnode **rvp); int vn_utimes_perm(struct vnode *vp, struct vattr *vap, struct ucred *cred, struct thread *td); int vn_io_fault_uiomove(char *data, int xfersize, struct uio *uio); int vn_io_fault_pgmove(vm_page_t ma[], vm_offset_t offset, int xfersize, struct uio *uio); void vn_seqc_write_begin_unheld_locked(struct vnode *vp); void vn_seqc_write_begin_unheld(struct vnode *vp); void vn_seqc_write_begin_locked(struct vnode *vp); void vn_seqc_write_begin(struct vnode *vp); void vn_seqc_write_end_locked(struct vnode *vp); void vn_seqc_write_end(struct vnode *vp); #define vn_seqc_read_any(vp) seqc_read_any(&(vp)->v_seqc) #define vn_seqc_consistent(vp, seq) seqc_consistent(&(vp)->v_seqc, seq) #define vn_rangelock_unlock(vp, cookie) \ rangelock_unlock(&(vp)->v_rl, (cookie), VI_MTX(vp)) #define vn_rangelock_unlock_range(vp, cookie, start, end) \ rangelock_unlock_range(&(vp)->v_rl, (cookie), (start), (end), \ VI_MTX(vp)) #define vn_rangelock_rlock(vp, start, end) \ rangelock_rlock(&(vp)->v_rl, (start), (end), VI_MTX(vp)) #define vn_rangelock_tryrlock(vp, start, end) \ rangelock_tryrlock(&(vp)->v_rl, (start), (end), VI_MTX(vp)) #define vn_rangelock_wlock(vp, start, end) \ rangelock_wlock(&(vp)->v_rl, (start), (end), VI_MTX(vp)) #define vn_rangelock_trywlock(vp, start, end) \ rangelock_trywlock(&(vp)->v_rl, (start), (end), VI_MTX(vp)) int vfs_cache_lookup(struct vop_lookup_args *ap); int vfs_cache_root(struct mount *mp, int flags, struct vnode **vpp); void vfs_timestamp(struct timespec *); void vfs_write_resume(struct mount *mp, int flags); int vfs_write_suspend(struct mount *mp, int flags); int vfs_write_suspend_umnt(struct mount *mp); void vnlru_free(int, struct vfsops *); int vop_stdbmap(struct vop_bmap_args *); int vop_stdfdatasync_buf(struct vop_fdatasync_args *); int vop_stdfsync(struct vop_fsync_args *); int vop_stdgetwritemount(struct vop_getwritemount_args *); int vop_stdgetpages(struct vop_getpages_args *); int vop_stdinactive(struct vop_inactive_args *); int vop_stdioctl(struct vop_ioctl_args *); int vop_stdneed_inactive(struct vop_need_inactive_args *); int vop_stdkqfilter(struct vop_kqfilter_args *); int vop_stdlock(struct vop_lock1_args *); int vop_stdunlock(struct vop_unlock_args *); int vop_stdislocked(struct vop_islocked_args *); int vop_lock(struct vop_lock1_args *); int vop_unlock(struct vop_unlock_args *); int vop_islocked(struct vop_islocked_args *); int vop_stdputpages(struct vop_putpages_args *); int vop_nopoll(struct vop_poll_args *); int vop_stdaccess(struct vop_access_args *ap); int vop_stdaccessx(struct vop_accessx_args *ap); int vop_stdadvise(struct vop_advise_args *ap); int vop_stdadvlock(struct vop_advlock_args *ap); int vop_stdadvlockasync(struct vop_advlockasync_args *ap); int vop_stdadvlockpurge(struct vop_advlockpurge_args *ap); int vop_stdallocate(struct vop_allocate_args *ap); int vop_stdset_text(struct vop_set_text_args *ap); int vop_stdpathconf(struct vop_pathconf_args *); int vop_stdpoll(struct vop_poll_args *); int vop_stdvptocnp(struct vop_vptocnp_args *ap); int vop_stdvptofh(struct vop_vptofh_args *ap); int vop_stdunp_bind(struct vop_unp_bind_args *ap); int vop_stdunp_connect(struct vop_unp_connect_args *ap); int vop_stdunp_detach(struct vop_unp_detach_args *ap); int vop_eopnotsupp(struct vop_generic_args *ap); int vop_ebadf(struct vop_generic_args *ap); int vop_einval(struct vop_generic_args *ap); int vop_enoent(struct vop_generic_args *ap); int vop_enotty(struct vop_generic_args *ap); int vop_null(struct vop_generic_args *ap); int vop_panic(struct vop_generic_args *ap); int dead_poll(struct vop_poll_args *ap); int dead_read(struct vop_read_args *ap); int dead_write(struct vop_write_args *ap); /* These are called from within the actual VOPS. */ void vop_close_post(void *a, int rc); void vop_create_pre(void *a); void vop_create_post(void *a, int rc); void vop_whiteout_pre(void *a); void vop_whiteout_post(void *a, int rc); void vop_deleteextattr_pre(void *a); void vop_deleteextattr_post(void *a, int rc); void vop_link_pre(void *a); void vop_link_post(void *a, int rc); void vop_lookup_post(void *a, int rc); void vop_lookup_pre(void *a); void vop_mkdir_pre(void *a); void vop_mkdir_post(void *a, int rc); void vop_mknod_pre(void *a); void vop_mknod_post(void *a, int rc); void vop_open_post(void *a, int rc); void vop_read_post(void *a, int rc); void vop_readdir_post(void *a, int rc); void vop_reclaim_post(void *a, int rc); void vop_remove_pre(void *a); void vop_remove_post(void *a, int rc); void vop_rename_post(void *a, int rc); void vop_rename_pre(void *a); void vop_rmdir_pre(void *a); void vop_rmdir_post(void *a, int rc); void vop_setattr_pre(void *a); void vop_setattr_post(void *a, int rc); void vop_setacl_pre(void *a); void vop_setacl_post(void *a, int rc); void vop_setextattr_pre(void *a); void vop_setextattr_post(void *a, int rc); void vop_symlink_pre(void *a); void vop_symlink_post(void *a, int rc); int vop_sigdefer(struct vop_vector *vop, struct vop_generic_args *a); #ifdef DEBUG_VFS_LOCKS void vop_fplookup_vexec_debugpre(void *a); void vop_fplookup_vexec_debugpost(void *a, int rc); void vop_strategy_debugpre(void *a); void vop_lock_debugpre(void *a); void vop_lock_debugpost(void *a, int rc); void vop_unlock_debugpre(void *a); void vop_need_inactive_debugpre(void *a); void vop_need_inactive_debugpost(void *a, int rc); #else #define vop_fplookup_vexec_debugpre(x) do { } while (0) #define vop_fplookup_vexec_debugpost(x, y) do { } while (0) #define vop_strategy_debugpre(x) do { } while (0) #define vop_lock_debugpre(x) do { } while (0) #define vop_lock_debugpost(x, y) do { } while (0) #define vop_unlock_debugpre(x) do { } while (0) #define vop_need_inactive_debugpre(x) do { } while (0) #define vop_need_inactive_debugpost(x, y) do { } while (0) #endif void vop_rename_fail(struct vop_rename_args *ap); +#define vop_stat_helper_pre(ap) ({ \ + int _error; \ + AUDIT_ARG_VNODE1(ap->a_vp); \ + _error = mac_vnode_check_stat(ap->a_active_cred, ap->a_file_cred, ap->a_vp);\ + if (__predict_true(_error == 0)) \ + bzero(ap->a_sb, sizeof(*ap->a_sb)); \ + _error; \ +}) + +#define vop_stat_helper_post(ap, error) ({ \ + int _error = (error); \ + if (priv_check_cred_vfs_generation(ap->a_td->td_ucred)) \ + ap->a_sb->st_gen = 0; \ + _error; \ +}) + #define VOP_WRITE_PRE(ap) \ struct vattr va; \ int error; \ off_t osize, ooffset, noffset; \ \ osize = ooffset = noffset = 0; \ if (!VN_KNLIST_EMPTY((ap)->a_vp)) { \ error = VOP_GETATTR((ap)->a_vp, &va, (ap)->a_cred); \ if (error) \ return (error); \ ooffset = (ap)->a_uio->uio_offset; \ osize = (off_t)va.va_size; \ } #define VOP_WRITE_POST(ap, ret) \ noffset = (ap)->a_uio->uio_offset; \ if (noffset > ooffset && !VN_KNLIST_EMPTY((ap)->a_vp)) { \ VFS_KNOTE_LOCKED((ap)->a_vp, NOTE_WRITE \ | (noffset > osize ? NOTE_EXTEND : 0)); \ } #define VOP_LOCK(vp, flags) VOP_LOCK1(vp, flags, __FILE__, __LINE__) #ifdef INVARIANTS #define VOP_ADD_WRITECOUNT_CHECKED(vp, cnt) \ do { \ int error_; \ \ error_ = VOP_ADD_WRITECOUNT((vp), (cnt)); \ VNASSERT(error_ == 0, (vp), ("VOP_ADD_WRITECOUNT returned %d", \ error_)); \ } while (0) #define VOP_SET_TEXT_CHECKED(vp) \ do { \ int error_; \ \ error_ = VOP_SET_TEXT((vp)); \ VNASSERT(error_ == 0, (vp), ("VOP_SET_TEXT returned %d", \ error_)); \ } while (0) #define VOP_UNSET_TEXT_CHECKED(vp) \ do { \ int error_; \ \ error_ = VOP_UNSET_TEXT((vp)); \ VNASSERT(error_ == 0, (vp), ("VOP_UNSET_TEXT returned %d", \ error_)); \ } while (0) #else #define VOP_ADD_WRITECOUNT_CHECKED(vp, cnt) VOP_ADD_WRITECOUNT((vp), (cnt)) #define VOP_SET_TEXT_CHECKED(vp) VOP_SET_TEXT((vp)) #define VOP_UNSET_TEXT_CHECKED(vp) VOP_UNSET_TEXT((vp)) #endif #define VN_IS_DOOMED(vp) __predict_false((vp)->v_irflag & VIRF_DOOMED) void vput(struct vnode *vp); void vrele(struct vnode *vp); void vref(struct vnode *vp); void vrefl(struct vnode *vp); void vrefact(struct vnode *vp); void vrefactn(struct vnode *vp, u_int n); int vrefcnt(struct vnode *vp); void v_addpollinfo(struct vnode *vp); int vnode_create_vobject(struct vnode *vp, off_t size, struct thread *td); void vnode_destroy_vobject(struct vnode *vp); extern struct vop_vector fifo_specops; extern struct vop_vector dead_vnodeops; extern struct vop_vector default_vnodeops; #define VOP_PANIC ((void*)(uintptr_t)vop_panic) #define VOP_NULL ((void*)(uintptr_t)vop_null) #define VOP_EBADF ((void*)(uintptr_t)vop_ebadf) #define VOP_ENOTTY ((void*)(uintptr_t)vop_enotty) #define VOP_EINVAL ((void*)(uintptr_t)vop_einval) #define VOP_ENOENT ((void*)(uintptr_t)vop_enoent) #define VOP_EOPNOTSUPP ((void*)(uintptr_t)vop_eopnotsupp) /* fifo_vnops.c */ int fifo_printinfo(struct vnode *); /* vfs_hash.c */ typedef int vfs_hash_cmp_t(struct vnode *vp, void *arg); void vfs_hash_changesize(u_long newhashsize); int vfs_hash_get(const struct mount *mp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); u_int vfs_hash_index(struct vnode *vp); int vfs_hash_insert(struct vnode *vp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); void vfs_hash_ref(const struct mount *mp, u_int hash, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); void vfs_hash_rehash(struct vnode *vp, u_int hash); void vfs_hash_remove(struct vnode *vp); int vfs_kqfilter(struct vop_kqfilter_args *); struct dirent; int vfs_read_dirent(struct vop_readdir_args *ap, struct dirent *dp, off_t off); int vfs_emptydir(struct vnode *vp); int vfs_unixify_accmode(accmode_t *accmode); void vfs_unp_reclaim(struct vnode *vp); int setfmode(struct thread *td, struct ucred *cred, struct vnode *vp, int mode); int setfown(struct thread *td, struct ucred *cred, struct vnode *vp, uid_t uid, gid_t gid); int vn_chmod(struct file *fp, mode_t mode, struct ucred *active_cred, struct thread *td); int vn_chown(struct file *fp, uid_t uid, gid_t gid, struct ucred *active_cred, struct thread *td); void vn_fsid(struct vnode *vp, struct vattr *va); int vn_dir_check_exec(struct vnode *vp, struct componentname *cnp); #define VOP_UNLOCK_FLAGS(vp, flags) ({ \ struct vnode *_vp = (vp); \ int _flags = (flags); \ int _error; \ \ if ((_flags & ~(LK_INTERLOCK | LK_RELEASE)) != 0) \ panic("%s: unsupported flags %x\n", __func__, flags); \ _error = VOP_UNLOCK(_vp); \ if (_flags & LK_INTERLOCK) \ VI_UNLOCK(_vp); \ _error; \ }) #include #define VFS_VOP_VECTOR_REGISTER(vnodeops) \ SYSINIT(vfs_vector_##vnodeops##_f, SI_SUB_VFS, SI_ORDER_ANY, \ vfs_vector_op_register, &vnodeops) #define VFS_SMR_DECLARE \ extern smr_t vfs_smr #define VFS_SMR() vfs_smr #define vfs_smr_enter() smr_enter(VFS_SMR()) #define vfs_smr_exit() smr_exit(VFS_SMR()) #define vfs_smr_entered_load(ptr) smr_entered_load((ptr), VFS_SMR()) #define VFS_SMR_ASSERT_ENTERED() SMR_ASSERT_ENTERED(VFS_SMR()) #define VFS_SMR_ASSERT_NOT_ENTERED() SMR_ASSERT_NOT_ENTERED(VFS_SMR()) #define VFS_SMR_ZONE_SET(zone) uma_zone_set_smr((zone), VFS_SMR()) #define vn_load_v_data_smr(vp) ({ \ struct vnode *_vp = (vp); \ \ VFS_SMR_ASSERT_ENTERED(); \ atomic_load_ptr(&(_vp)->v_data); \ }) #endif /* _KERNEL */ #endif /* !_SYS_VNODE_H_ */ diff --git a/sys/ufs/ufs/ufs_vnops.c b/sys/ufs/ufs/ufs_vnops.c index 25c75e1d584f..087c64bd9671 100644 --- a/sys/ufs/ufs/ufs_vnops.c +++ b/sys/ufs/ufs/ufs_vnops.c @@ -1,2892 +1,2954 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 1989, 1993, 1995 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, 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. * 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. * * @(#)ufs_vnops.c 8.27 (Berkeley) 5/27/95 */ #include __FBSDID("$FreeBSD$"); #include "opt_quota.h" #include "opt_suiddir.h" #include "opt_ufs.h" #include "opt_ffs.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include +#include #include #include /* XXX */ #include #include #include #include #include #include #include #include #include #ifdef UFS_DIRHASH #include #endif #ifdef UFS_GJOURNAL #include FEATURE(ufs_gjournal, "Journaling support through GEOM for UFS"); #endif #ifdef QUOTA FEATURE(ufs_quota, "UFS disk quotas support"); FEATURE(ufs_quota64, "64bit UFS disk quotas support"); #endif #ifdef SUIDDIR FEATURE(suiddir, "Give all new files in directory the same ownership as the directory"); #endif VFS_SMR_DECLARE; #include static vop_accessx_t ufs_accessx; static vop_fplookup_vexec_t ufs_fplookup_vexec; static int ufs_chmod(struct vnode *, int, struct ucred *, struct thread *); static int ufs_chown(struct vnode *, uid_t, gid_t, struct ucred *, struct thread *); static vop_close_t ufs_close; static vop_create_t ufs_create; +static vop_stat_t ufs_stat; static vop_getattr_t ufs_getattr; static vop_ioctl_t ufs_ioctl; static vop_link_t ufs_link; static int ufs_makeinode(int mode, struct vnode *, struct vnode **, struct componentname *, const char *); static vop_mmapped_t ufs_mmapped; static vop_mkdir_t ufs_mkdir; static vop_mknod_t ufs_mknod; static vop_open_t ufs_open; static vop_pathconf_t ufs_pathconf; static vop_print_t ufs_print; static vop_readlink_t ufs_readlink; static vop_remove_t ufs_remove; static vop_rename_t ufs_rename; static vop_rmdir_t ufs_rmdir; static vop_setattr_t ufs_setattr; static vop_strategy_t ufs_strategy; static vop_symlink_t ufs_symlink; static vop_whiteout_t ufs_whiteout; static vop_close_t ufsfifo_close; static vop_kqfilter_t ufsfifo_kqfilter; SYSCTL_NODE(_vfs, OID_AUTO, ufs, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "UFS filesystem"); /* * A virgin directory (no blushing please). */ static struct dirtemplate mastertemplate = { 0, 12, DT_DIR, 1, ".", 0, DIRBLKSIZ - 12, DT_DIR, 2, ".." }; static struct odirtemplate omastertemplate = { 0, 12, 1, ".", 0, DIRBLKSIZ - 12, 2, ".." }; static void ufs_itimes_locked(struct vnode *vp) { struct inode *ip; struct timespec ts; ASSERT_VI_LOCKED(vp, __func__); ip = VTOI(vp); if (UFS_RDONLY(ip)) goto out; if ((ip->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) == 0) return; if ((vp->v_type == VBLK || vp->v_type == VCHR) && !DOINGSOFTDEP(vp)) UFS_INODE_SET_FLAG(ip, IN_LAZYMOD); else if (((vp->v_mount->mnt_kern_flag & (MNTK_SUSPENDED | MNTK_SUSPEND)) == 0) || (ip->i_flag & (IN_CHANGE | IN_UPDATE))) UFS_INODE_SET_FLAG(ip, IN_MODIFIED); else if (ip->i_flag & IN_ACCESS) UFS_INODE_SET_FLAG(ip, IN_LAZYACCESS); vfs_timestamp(&ts); if (ip->i_flag & IN_ACCESS) { DIP_SET(ip, i_atime, ts.tv_sec); DIP_SET(ip, i_atimensec, ts.tv_nsec); } if (ip->i_flag & IN_UPDATE) { DIP_SET(ip, i_mtime, ts.tv_sec); DIP_SET(ip, i_mtimensec, ts.tv_nsec); } if (ip->i_flag & IN_CHANGE) { DIP_SET(ip, i_ctime, ts.tv_sec); DIP_SET(ip, i_ctimensec, ts.tv_nsec); DIP_SET(ip, i_modrev, DIP(ip, i_modrev) + 1); } out: ip->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); } void ufs_itimes(struct vnode *vp) { VI_LOCK(vp); ufs_itimes_locked(vp); VI_UNLOCK(vp); } /* * Create a regular file */ static int ufs_create(ap) struct vop_create_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap; { int error; error = ufs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), ap->a_dvp, ap->a_vpp, ap->a_cnp, "ufs_create"); if (error != 0) return (error); if ((ap->a_cnp->cn_flags & MAKEENTRY) != 0) cache_enter(ap->a_dvp, *ap->a_vpp, ap->a_cnp); return (0); } /* * Mknod vnode call */ /* ARGSUSED */ static int ufs_mknod(ap) struct vop_mknod_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap; { struct vattr *vap = ap->a_vap; struct vnode **vpp = ap->a_vpp; struct inode *ip; ino_t ino; int error; error = ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), ap->a_dvp, vpp, ap->a_cnp, "ufs_mknod"); if (error) return (error); ip = VTOI(*vpp); UFS_INODE_SET_FLAG(ip, IN_ACCESS | IN_CHANGE | IN_UPDATE); if (vap->va_rdev != VNOVAL) { /* * Want to be able to use this to make badblock * inodes, so don't truncate the dev number. */ DIP_SET(ip, i_rdev, vap->va_rdev); } /* * Remove inode, then reload it through VFS_VGET so it is * checked to see if it is an alias of an existing entry in * the inode cache. XXX I don't believe this is necessary now. */ (*vpp)->v_type = VNON; ino = ip->i_number; /* Save this before vgone() invalidates ip. */ vgone(*vpp); vput(*vpp); error = VFS_VGET(ap->a_dvp->v_mount, ino, LK_EXCLUSIVE, vpp); if (error) { *vpp = NULL; return (error); } return (0); } /* * Open called. */ /* ARGSUSED */ static int ufs_open(struct vop_open_args *ap) { struct vnode *vp = ap->a_vp; struct inode *ip; if (vp->v_type == VCHR || vp->v_type == VBLK) return (EOPNOTSUPP); ip = VTOI(vp); /* * Files marked append-only must be opened for appending. */ if ((ip->i_flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) return (EPERM); vnode_create_vobject(vp, DIP(ip, i_size), ap->a_td); return (0); } /* * Close called. * * Update the times on the inode. */ /* ARGSUSED */ static int ufs_close(ap) struct vop_close_args /* { struct vnode *a_vp; int a_fflag; struct ucred *a_cred; struct thread *a_td; } */ *ap; { struct vnode *vp = ap->a_vp; int usecount; VI_LOCK(vp); usecount = vp->v_usecount; if (usecount > 1) ufs_itimes_locked(vp); VI_UNLOCK(vp); return (0); } static int ufs_accessx(ap) struct vop_accessx_args /* { struct vnode *a_vp; accmode_t a_accmode; struct ucred *a_cred; struct thread *a_td; } */ *ap; { struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); accmode_t accmode = ap->a_accmode; int error; #ifdef UFS_ACL struct acl *acl; acl_type_t type; #endif /* * Disallow write attempts on read-only filesystems; * unless the file is a socket, fifo, or a block or * character device resident on the filesystem. */ if (accmode & VMODIFY_PERMS) { switch (vp->v_type) { case VDIR: case VLNK: case VREG: if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); #ifdef QUOTA /* * Inode is accounted in the quotas only if struct * dquot is attached to it. VOP_ACCESS() is called * from vn_open_cred() and provides a convenient * point to call getinoquota(). The lock mode is * exclusive when the file is opening for write. */ if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE) { error = getinoquota(ip); if (error != 0) return (error); } #endif break; default: break; } } /* * If immutable bit set, nobody gets to write it. "& ~VADMIN_PERMS" * permits the owner of the file to remove the IMMUTABLE flag. */ if ((accmode & (VMODIFY_PERMS & ~VADMIN_PERMS)) && (ip->i_flags & (IMMUTABLE | SF_SNAPSHOT))) return (EPERM); #ifdef UFS_ACL if ((vp->v_mount->mnt_flag & (MNT_ACLS | MNT_NFS4ACLS)) != 0) { if (vp->v_mount->mnt_flag & MNT_NFS4ACLS) type = ACL_TYPE_NFS4; else type = ACL_TYPE_ACCESS; acl = acl_alloc(M_WAITOK); if (type == ACL_TYPE_NFS4) error = ufs_getacl_nfs4_internal(vp, acl, ap->a_td); else error = VOP_GETACL(vp, type, acl, ap->a_cred, ap->a_td); switch (error) { case 0: if (type == ACL_TYPE_NFS4) { error = vaccess_acl_nfs4(vp->v_type, ip->i_uid, ip->i_gid, acl, accmode, ap->a_cred); } else { error = vfs_unixify_accmode(&accmode); if (error == 0) error = vaccess_acl_posix1e(vp->v_type, ip->i_uid, ip->i_gid, acl, accmode, ap->a_cred); } break; default: if (error != EOPNOTSUPP) printf( "ufs_accessx(): Error retrieving ACL on object (%d).\n", error); /* * XXX: Fall back until debugged. Should * eventually possibly log an error, and return * EPERM for safety. */ error = vfs_unixify_accmode(&accmode); if (error == 0) error = vaccess(vp->v_type, ip->i_mode, ip->i_uid, ip->i_gid, accmode, ap->a_cred); } acl_free(acl); return (error); } #endif /* !UFS_ACL */ error = vfs_unixify_accmode(&accmode); if (error == 0) error = vaccess(vp->v_type, ip->i_mode, ip->i_uid, ip->i_gid, accmode, ap->a_cred); return (error); } /* * VOP_FPLOOKUP_VEXEC routines are subject to special circumstances, see * the comment above cache_fplookup for details. */ static int ufs_fplookup_vexec(ap) struct vop_fplookup_vexec_args /* { struct vnode *a_vp; struct ucred *a_cred; struct thread *a_td; } */ *ap; { struct vnode *vp; struct inode *ip; struct ucred *cred; mode_t all_x, mode; vp = ap->a_vp; ip = VTOI_SMR(vp); if (__predict_false(ip == NULL)) return (EAGAIN); /* * XXX ACL race * * ACLs are not supported and UFS clears/sets this flag on mount and * remount. However, we may still be racing with seeing them and there * is no provision to make sure they were accounted for. This matches * the behavior of the locked case, since the lookup there is also * racy: mount takes no measures to block anyone from progressing. */ all_x = S_IXUSR | S_IXGRP | S_IXOTH; mode = atomic_load_short(&ip->i_mode); if (__predict_true((mode & all_x) == all_x)) return (0); cred = ap->a_cred; return (vaccess_vexec_smr(mode, ip->i_uid, ip->i_gid, cred)); } +/* ARGSUSED */ +static int +ufs_stat(struct vop_stat_args *ap) +{ + struct vnode *vp = ap->a_vp; + struct inode *ip = VTOI(vp); + struct stat *sb = ap->a_sb; + int error; + + error = vop_stat_helper_pre(ap); + if (__predict_false(error)) + return (error); + + VI_LOCK(vp); + ufs_itimes_locked(vp); + if (I_IS_UFS1(ip)) { + sb->st_atim.tv_sec = ip->i_din1->di_atime; + sb->st_atim.tv_nsec = ip->i_din1->di_atimensec; + } else { + sb->st_atim.tv_sec = ip->i_din2->di_atime; + sb->st_atim.tv_nsec = ip->i_din2->di_atimensec; + } + VI_UNLOCK(vp); + + sb->st_dev = vp->v_mount->mnt_stat.f_fsid.val[0]; + sb->st_ino = ip->i_number; + sb->st_mode = (ip->i_mode & ~IFMT) | VTTOIF(vp->v_type); + sb->st_nlink = ip->i_effnlink; + sb->st_uid = ip->i_uid; + sb->st_gid = ip->i_gid; + if (I_IS_UFS1(ip)) { + sb->st_rdev = ip->i_din1->di_rdev; + sb->st_size = ip->i_din1->di_size; + sb->st_mtim.tv_sec = ip->i_din1->di_mtime; + sb->st_mtim.tv_nsec = ip->i_din1->di_mtimensec; + sb->st_ctim.tv_sec = ip->i_din1->di_ctime; + sb->st_ctim.tv_nsec = ip->i_din1->di_ctimensec; + sb->st_birthtim.tv_sec = -1; + sb->st_birthtim.tv_nsec = 0; + sb->st_blocks = dbtob((u_quad_t)ip->i_din1->di_blocks) / S_BLKSIZE; + } else { + sb->st_rdev = ip->i_din2->di_rdev; + sb->st_size = ip->i_din2->di_size; + sb->st_mtim.tv_sec = ip->i_din2->di_mtime; + sb->st_mtim.tv_nsec = ip->i_din2->di_mtimensec; + sb->st_ctim.tv_sec = ip->i_din2->di_ctime; + sb->st_ctim.tv_nsec = ip->i_din2->di_ctimensec; + sb->st_birthtim.tv_sec = ip->i_din2->di_birthtime; + sb->st_birthtim.tv_nsec = ip->i_din2->di_birthnsec; + sb->st_blocks = dbtob((u_quad_t)ip->i_din2->di_blocks) / S_BLKSIZE; + } + + sb->st_blksize = max(PAGE_SIZE, vp->v_mount->mnt_stat.f_iosize); + sb->st_flags = ip->i_flags; + sb->st_gen = ip->i_gen; + + return (vop_stat_helper_post(ap, error)); +} + /* ARGSUSED */ static int ufs_getattr(ap) struct vop_getattr_args /* { struct vnode *a_vp; struct vattr *a_vap; struct ucred *a_cred; } */ *ap; { struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); struct vattr *vap = ap->a_vap; VI_LOCK(vp); ufs_itimes_locked(vp); if (I_IS_UFS1(ip)) { vap->va_atime.tv_sec = ip->i_din1->di_atime; vap->va_atime.tv_nsec = ip->i_din1->di_atimensec; } else { vap->va_atime.tv_sec = ip->i_din2->di_atime; vap->va_atime.tv_nsec = ip->i_din2->di_atimensec; } VI_UNLOCK(vp); /* * Copy from inode table */ vap->va_fsid = dev2udev(ITOUMP(ip)->um_dev); vap->va_fileid = ip->i_number; vap->va_mode = ip->i_mode & ~IFMT; vap->va_nlink = ip->i_effnlink; vap->va_uid = ip->i_uid; vap->va_gid = ip->i_gid; if (I_IS_UFS1(ip)) { vap->va_rdev = ip->i_din1->di_rdev; vap->va_size = ip->i_din1->di_size; vap->va_mtime.tv_sec = ip->i_din1->di_mtime; vap->va_mtime.tv_nsec = ip->i_din1->di_mtimensec; vap->va_ctime.tv_sec = ip->i_din1->di_ctime; vap->va_ctime.tv_nsec = ip->i_din1->di_ctimensec; vap->va_bytes = dbtob((u_quad_t)ip->i_din1->di_blocks); vap->va_filerev = ip->i_din1->di_modrev; } else { vap->va_rdev = ip->i_din2->di_rdev; vap->va_size = ip->i_din2->di_size; vap->va_mtime.tv_sec = ip->i_din2->di_mtime; vap->va_mtime.tv_nsec = ip->i_din2->di_mtimensec; vap->va_ctime.tv_sec = ip->i_din2->di_ctime; vap->va_ctime.tv_nsec = ip->i_din2->di_ctimensec; vap->va_birthtime.tv_sec = ip->i_din2->di_birthtime; vap->va_birthtime.tv_nsec = ip->i_din2->di_birthnsec; vap->va_bytes = dbtob((u_quad_t)ip->i_din2->di_blocks); vap->va_filerev = ip->i_din2->di_modrev; } vap->va_flags = ip->i_flags; vap->va_gen = ip->i_gen; vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize; vap->va_type = IFTOVT(ip->i_mode); return (0); } /* * Set attribute vnode op. called from several syscalls */ static int ufs_setattr(ap) struct vop_setattr_args /* { struct vnode *a_vp; struct vattr *a_vap; struct ucred *a_cred; } */ *ap; { struct vattr *vap = ap->a_vap; struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); struct ucred *cred = ap->a_cred; struct thread *td = curthread; int error; /* * Check for unsettable attributes. */ if ((vap->va_type != VNON) || (vap->va_nlink != VNOVAL) || (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) || (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) || ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) { return (EINVAL); } if (vap->va_flags != VNOVAL) { if ((vap->va_flags & ~(SF_APPEND | SF_ARCHIVED | SF_IMMUTABLE | SF_NOUNLINK | SF_SNAPSHOT | UF_APPEND | UF_ARCHIVE | UF_HIDDEN | UF_IMMUTABLE | UF_NODUMP | UF_NOUNLINK | UF_OFFLINE | UF_OPAQUE | UF_READONLY | UF_REPARSE | UF_SPARSE | UF_SYSTEM)) != 0) return (EOPNOTSUPP); if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); /* * Callers may only modify the file flags on objects they * have VADMIN rights for. */ if ((error = VOP_ACCESS(vp, VADMIN, cred, td))) return (error); /* * Unprivileged processes are not permitted to unset system * flags, or modify flags if any system flags are set. * Privileged non-jail processes may not modify system flags * if securelevel > 0 and any existing system flags are set. * Privileged jail processes behave like privileged non-jail * processes if the PR_ALLOW_CHFLAGS permission bit is set; * otherwise, they behave like unprivileged processes. */ if (!priv_check_cred(cred, PRIV_VFS_SYSFLAGS)) { if (ip->i_flags & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND)) { error = securelevel_gt(cred, 0); if (error) return (error); } /* The snapshot flag cannot be toggled. */ if ((vap->va_flags ^ ip->i_flags) & SF_SNAPSHOT) return (EPERM); } else { if (ip->i_flags & (SF_NOUNLINK | SF_IMMUTABLE | SF_APPEND) || ((vap->va_flags ^ ip->i_flags) & SF_SETTABLE)) return (EPERM); } ip->i_flags = vap->va_flags; DIP_SET(ip, i_flags, vap->va_flags); UFS_INODE_SET_FLAG(ip, IN_CHANGE); error = UFS_UPDATE(vp, 0); if (ip->i_flags & (IMMUTABLE | APPEND)) return (error); } /* * If immutable or append, no one can change any of its attributes * except the ones already handled (in some cases, file flags * including the immutability flags themselves for the superuser). */ if (ip->i_flags & (IMMUTABLE | APPEND)) return (EPERM); /* * Go through the fields and update iff not VNOVAL. */ if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) { if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); if ((error = ufs_chown(vp, vap->va_uid, vap->va_gid, cred, td)) != 0) return (error); } if (vap->va_size != VNOVAL) { /* * XXX most of the following special cases should be in * callers instead of in N filesystems. The VDIR check * mostly already is. */ switch (vp->v_type) { case VDIR: return (EISDIR); case VLNK: case VREG: /* * Truncation should have an effect in these cases. * Disallow it if the filesystem is read-only or * the file is being snapshotted. */ if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); if ((ip->i_flags & SF_SNAPSHOT) != 0) return (EPERM); break; default: /* * According to POSIX, the result is unspecified * for file types other than regular files, * directories and shared memory objects. We * don't support shared memory objects in the file * system, and have dubious support for truncating * symlinks. Just ignore the request in other cases. */ return (0); } if ((error = UFS_TRUNCATE(vp, vap->va_size, IO_NORMAL | ((vap->va_vaflags & VA_SYNC) != 0 ? IO_SYNC : 0), cred)) != 0) return (error); } if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL || vap->va_birthtime.tv_sec != VNOVAL) { if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); if ((ip->i_flags & SF_SNAPSHOT) != 0) return (EPERM); error = vn_utimes_perm(vp, vap, cred, td); if (error != 0) return (error); UFS_INODE_SET_FLAG(ip, IN_CHANGE | IN_MODIFIED); if (vap->va_atime.tv_sec != VNOVAL) { ip->i_flag &= ~IN_ACCESS; DIP_SET(ip, i_atime, vap->va_atime.tv_sec); DIP_SET(ip, i_atimensec, vap->va_atime.tv_nsec); } if (vap->va_mtime.tv_sec != VNOVAL) { ip->i_flag &= ~IN_UPDATE; DIP_SET(ip, i_mtime, vap->va_mtime.tv_sec); DIP_SET(ip, i_mtimensec, vap->va_mtime.tv_nsec); } if (vap->va_birthtime.tv_sec != VNOVAL && I_IS_UFS2(ip)) { ip->i_din2->di_birthtime = vap->va_birthtime.tv_sec; ip->i_din2->di_birthnsec = vap->va_birthtime.tv_nsec; } error = UFS_UPDATE(vp, 0); if (error) return (error); } error = 0; if (vap->va_mode != (mode_t)VNOVAL) { if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); if ((ip->i_flags & SF_SNAPSHOT) != 0 && (vap->va_mode & (S_IXUSR | S_IWUSR | S_IXGRP | S_IWGRP | S_IXOTH | S_IWOTH))) return (EPERM); error = ufs_chmod(vp, (int)vap->va_mode, cred, td); } return (error); } #ifdef UFS_ACL static int ufs_update_nfs4_acl_after_mode_change(struct vnode *vp, int mode, int file_owner_id, struct ucred *cred, struct thread *td) { int error; struct acl *aclp; aclp = acl_alloc(M_WAITOK); error = ufs_getacl_nfs4_internal(vp, aclp, td); /* * We don't have to handle EOPNOTSUPP here, as the filesystem claims * it supports ACLs. */ if (error) goto out; acl_nfs4_sync_acl_from_mode(aclp, mode, file_owner_id); error = ufs_setacl_nfs4_internal(vp, aclp, td); out: acl_free(aclp); return (error); } #endif /* UFS_ACL */ static int ufs_mmapped(ap) struct vop_mmapped_args /* { struct vnode *a_vp; } */ *ap; { struct vnode *vp; struct inode *ip; struct mount *mp; vp = ap->a_vp; ip = VTOI(vp); mp = vp->v_mount; if ((mp->mnt_flag & (MNT_NOATIME | MNT_RDONLY)) == 0) UFS_INODE_SET_FLAG_SHARED(ip, IN_ACCESS); /* * XXXKIB No UFS_UPDATE(ap->a_vp, 0) there. */ return (0); } /* * Change the mode on a file. * Inode must be locked before calling. */ static int ufs_chmod(vp, mode, cred, td) struct vnode *vp; int mode; struct ucred *cred; struct thread *td; { struct inode *ip = VTOI(vp); int newmode, error; /* * To modify the permissions on a file, must possess VADMIN * for that file. */ if ((error = VOP_ACCESSX(vp, VWRITE_ACL, cred, td))) return (error); /* * Privileged processes may set the sticky bit on non-directories, * as well as set the setgid bit on a file with a group that the * process is not a member of. Both of these are allowed in * jail(8). */ if (vp->v_type != VDIR && (mode & S_ISTXT)) { if (priv_check_cred(cred, PRIV_VFS_STICKYFILE)) return (EFTYPE); } if (!groupmember(ip->i_gid, cred) && (mode & ISGID)) { error = priv_check_cred(cred, PRIV_VFS_SETGID); if (error) return (error); } /* * Deny setting setuid if we are not the file owner. */ if ((mode & ISUID) && ip->i_uid != cred->cr_uid) { error = priv_check_cred(cred, PRIV_VFS_ADMIN); if (error) return (error); } newmode = ip->i_mode & ~ALLPERMS; newmode |= (mode & ALLPERMS); UFS_INODE_SET_MODE(ip, newmode); DIP_SET(ip, i_mode, ip->i_mode); UFS_INODE_SET_FLAG(ip, IN_CHANGE); #ifdef UFS_ACL if ((vp->v_mount->mnt_flag & MNT_NFS4ACLS) != 0) error = ufs_update_nfs4_acl_after_mode_change(vp, mode, ip->i_uid, cred, td); #endif if (error == 0 && (ip->i_flag & IN_CHANGE) != 0) error = UFS_UPDATE(vp, 0); return (error); } /* * Perform chown operation on inode ip; * inode must be locked prior to call. */ static int ufs_chown(vp, uid, gid, cred, td) struct vnode *vp; uid_t uid; gid_t gid; struct ucred *cred; struct thread *td; { struct inode *ip = VTOI(vp); uid_t ouid; gid_t ogid; int error = 0; #ifdef QUOTA int i; ufs2_daddr_t change; #endif if (uid == (uid_t)VNOVAL) uid = ip->i_uid; if (gid == (gid_t)VNOVAL) gid = ip->i_gid; /* * To modify the ownership of a file, must possess VADMIN for that * file. */ if ((error = VOP_ACCESSX(vp, VWRITE_OWNER, cred, td))) return (error); /* * To change the owner of a file, or change the group of a file to a * group of which we are not a member, the caller must have * privilege. */ if (((uid != ip->i_uid && uid != cred->cr_uid) || (gid != ip->i_gid && !groupmember(gid, cred))) && (error = priv_check_cred(cred, PRIV_VFS_CHOWN))) return (error); ogid = ip->i_gid; ouid = ip->i_uid; #ifdef QUOTA if ((error = getinoquota(ip)) != 0) return (error); if (ouid == uid) { dqrele(vp, ip->i_dquot[USRQUOTA]); ip->i_dquot[USRQUOTA] = NODQUOT; } if (ogid == gid) { dqrele(vp, ip->i_dquot[GRPQUOTA]); ip->i_dquot[GRPQUOTA] = NODQUOT; } change = DIP(ip, i_blocks); (void) chkdq(ip, -change, cred, CHOWN|FORCE); (void) chkiq(ip, -1, cred, CHOWN|FORCE); for (i = 0; i < MAXQUOTAS; i++) { dqrele(vp, ip->i_dquot[i]); ip->i_dquot[i] = NODQUOT; } #endif ip->i_gid = gid; DIP_SET(ip, i_gid, gid); ip->i_uid = uid; DIP_SET(ip, i_uid, uid); #ifdef QUOTA if ((error = getinoquota(ip)) == 0) { if (ouid == uid) { dqrele(vp, ip->i_dquot[USRQUOTA]); ip->i_dquot[USRQUOTA] = NODQUOT; } if (ogid == gid) { dqrele(vp, ip->i_dquot[GRPQUOTA]); ip->i_dquot[GRPQUOTA] = NODQUOT; } if ((error = chkdq(ip, change, cred, CHOWN)) == 0) { if ((error = chkiq(ip, 1, cred, CHOWN)) == 0) goto good; else (void) chkdq(ip, -change, cred, CHOWN|FORCE); } for (i = 0; i < MAXQUOTAS; i++) { dqrele(vp, ip->i_dquot[i]); ip->i_dquot[i] = NODQUOT; } } ip->i_gid = ogid; DIP_SET(ip, i_gid, ogid); ip->i_uid = ouid; DIP_SET(ip, i_uid, ouid); if (getinoquota(ip) == 0) { if (ouid == uid) { dqrele(vp, ip->i_dquot[USRQUOTA]); ip->i_dquot[USRQUOTA] = NODQUOT; } if (ogid == gid) { dqrele(vp, ip->i_dquot[GRPQUOTA]); ip->i_dquot[GRPQUOTA] = NODQUOT; } (void) chkdq(ip, change, cred, FORCE|CHOWN); (void) chkiq(ip, 1, cred, FORCE|CHOWN); (void) getinoquota(ip); } return (error); good: if (getinoquota(ip)) panic("ufs_chown: lost quota"); #endif /* QUOTA */ UFS_INODE_SET_FLAG(ip, IN_CHANGE); if ((ip->i_mode & (ISUID | ISGID)) && (ouid != uid || ogid != gid)) { if (priv_check_cred(cred, PRIV_VFS_RETAINSUGID)) { UFS_INODE_SET_MODE(ip, ip->i_mode & ~(ISUID | ISGID)); DIP_SET(ip, i_mode, ip->i_mode); } } error = UFS_UPDATE(vp, 0); return (error); } static int ufs_remove(ap) struct vop_remove_args /* { struct vnode *a_dvp; struct vnode *a_vp; struct componentname *a_cnp; } */ *ap; { struct inode *ip; struct vnode *vp = ap->a_vp; struct vnode *dvp = ap->a_dvp; int error; struct thread *td; td = curthread; ip = VTOI(vp); if ((ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || (VTOI(dvp)->i_flags & APPEND)) { error = EPERM; goto out; } #ifdef UFS_GJOURNAL ufs_gjournal_orphan(vp); #endif error = ufs_dirremove(dvp, ip, ap->a_cnp->cn_flags, 0); if (ip->i_nlink <= 0) vp->v_vflag |= VV_NOSYNC; if ((ip->i_flags & SF_SNAPSHOT) != 0) { /* * Avoid deadlock where another thread is trying to * update the inodeblock for dvp and is waiting on * snaplk. Temporary unlock the vnode lock for the * unlinked file and sync the directory. This should * allow vput() of the directory to not block later on * while holding the snapshot vnode locked, assuming * that the directory hasn't been unlinked too. */ VOP_UNLOCK(vp); (void) VOP_FSYNC(dvp, MNT_WAIT, td); vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); } out: return (error); } static void print_bad_link_count(const char *funcname, struct vnode *dvp) { struct inode *dip; dip = VTOI(dvp); uprintf("%s: Bad link count %d on parent inode %jd in file system %s\n", funcname, dip->i_effnlink, (intmax_t)dip->i_number, dvp->v_mount->mnt_stat.f_mntonname); } /* * link vnode call */ static int ufs_link(ap) struct vop_link_args /* { struct vnode *a_tdvp; struct vnode *a_vp; struct componentname *a_cnp; } */ *ap; { struct vnode *vp = ap->a_vp; struct vnode *tdvp = ap->a_tdvp; struct componentname *cnp = ap->a_cnp; struct inode *ip; struct direct newdir; int error; #ifdef INVARIANTS if ((cnp->cn_flags & HASBUF) == 0) panic("ufs_link: no name"); #endif if (VTOI(tdvp)->i_effnlink < 2) { print_bad_link_count("ufs_link", tdvp); error = EINVAL; goto out; } ip = VTOI(vp); if (ip->i_nlink >= UFS_LINK_MAX) { error = EMLINK; goto out; } /* * The file may have been removed after namei droped the original * lock. */ if (ip->i_effnlink == 0) { error = ENOENT; goto out; } if (ip->i_flags & (IMMUTABLE | APPEND)) { error = EPERM; goto out; } ip->i_effnlink++; ip->i_nlink++; DIP_SET(ip, i_nlink, ip->i_nlink); UFS_INODE_SET_FLAG(ip, IN_CHANGE); if (DOINGSOFTDEP(vp)) softdep_setup_link(VTOI(tdvp), ip); error = UFS_UPDATE(vp, !DOINGSOFTDEP(vp) && !DOINGASYNC(vp)); if (!error) { ufs_makedirentry(ip, cnp, &newdir); error = ufs_direnter(tdvp, vp, &newdir, cnp, NULL, 0); } if (error) { ip->i_effnlink--; ip->i_nlink--; DIP_SET(ip, i_nlink, ip->i_nlink); UFS_INODE_SET_FLAG(ip, IN_CHANGE); if (DOINGSOFTDEP(vp)) softdep_revert_link(VTOI(tdvp), ip); } out: return (error); } /* * whiteout vnode call */ static int ufs_whiteout(ap) struct vop_whiteout_args /* { struct vnode *a_dvp; struct componentname *a_cnp; int a_flags; } */ *ap; { struct vnode *dvp = ap->a_dvp; struct componentname *cnp = ap->a_cnp; struct direct newdir; int error = 0; switch (ap->a_flags) { case LOOKUP: /* 4.4 format directories support whiteout operations */ if (dvp->v_mount->mnt_maxsymlinklen > 0) return (0); return (EOPNOTSUPP); case CREATE: /* create a new directory whiteout */ #ifdef INVARIANTS if ((cnp->cn_flags & SAVENAME) == 0) panic("ufs_whiteout: missing name"); if (dvp->v_mount->mnt_maxsymlinklen <= 0) panic("ufs_whiteout: old format filesystem"); #endif newdir.d_ino = UFS_WINO; newdir.d_namlen = cnp->cn_namelen; bcopy(cnp->cn_nameptr, newdir.d_name, (unsigned)cnp->cn_namelen + 1); newdir.d_type = DT_WHT; error = ufs_direnter(dvp, NULL, &newdir, cnp, NULL, 0); break; case DELETE: /* remove an existing directory whiteout */ #ifdef INVARIANTS if (dvp->v_mount->mnt_maxsymlinklen <= 0) panic("ufs_whiteout: old format filesystem"); #endif cnp->cn_flags &= ~DOWHITEOUT; error = ufs_dirremove(dvp, NULL, cnp->cn_flags, 0); break; default: panic("ufs_whiteout: unknown op"); } return (error); } static volatile int rename_restarts; SYSCTL_INT(_vfs_ufs, OID_AUTO, rename_restarts, CTLFLAG_RD, __DEVOLATILE(int *, &rename_restarts), 0, "Times rename had to restart due to lock contention"); /* * Rename system call. * rename("foo", "bar"); * is essentially * unlink("bar"); * link("foo", "bar"); * unlink("foo"); * but ``atomically''. Can't do full commit without saving state in the * inode on disk which isn't feasible at this time. Best we can do is * always guarantee the target exists. * * Basic algorithm is: * * 1) Bump link count on source while we're linking it to the * target. This also ensure the inode won't be deleted out * from underneath us while we work (it may be truncated by * a concurrent `trunc' or `open' for creation). * 2) Link source to destination. If destination already exists, * delete it first. * 3) Unlink source reference to inode if still around. If a * directory was moved and the parent of the destination * is different from the source, patch the ".." entry in the * directory. */ static int ufs_rename(ap) struct vop_rename_args /* { struct vnode *a_fdvp; struct vnode *a_fvp; struct componentname *a_fcnp; struct vnode *a_tdvp; struct vnode *a_tvp; struct componentname *a_tcnp; } */ *ap; { struct vnode *tvp = ap->a_tvp; struct vnode *tdvp = ap->a_tdvp; struct vnode *fvp = ap->a_fvp; struct vnode *fdvp = ap->a_fdvp; struct vnode *nvp; struct componentname *tcnp = ap->a_tcnp; struct componentname *fcnp = ap->a_fcnp; struct thread *td = fcnp->cn_thread; struct inode *fip, *tip, *tdp, *fdp; struct direct newdir; off_t endoff; int doingdirectory, newparent; int error = 0; struct mount *mp; ino_t ino; bool want_seqc_end; want_seqc_end = false; #ifdef INVARIANTS if ((tcnp->cn_flags & HASBUF) == 0 || (fcnp->cn_flags & HASBUF) == 0) panic("ufs_rename: no name"); #endif endoff = 0; mp = tdvp->v_mount; VOP_UNLOCK(tdvp); if (tvp && tvp != tdvp) VOP_UNLOCK(tvp); /* * Check for cross-device rename. */ if ((fvp->v_mount != tdvp->v_mount) || (tvp && (fvp->v_mount != tvp->v_mount))) { error = EXDEV; mp = NULL; goto releout; } relock: /* * We need to acquire 2 to 4 locks depending on whether tvp is NULL * and fdvp and tdvp are the same directory. Subsequently we need * to double-check all paths and in the directory rename case we * need to verify that we are not creating a directory loop. To * handle this we acquire all but fdvp using non-blocking * acquisitions. If we fail to acquire any lock in the path we will * drop all held locks, acquire the new lock in a blocking fashion, * and then release it and restart the rename. This acquire/release * step ensures that we do not spin on a lock waiting for release. */ error = vn_lock(fdvp, LK_EXCLUSIVE); if (error) goto releout; if (vn_lock(tdvp, LK_EXCLUSIVE | LK_NOWAIT) != 0) { VOP_UNLOCK(fdvp); error = vn_lock(tdvp, LK_EXCLUSIVE); if (error) goto releout; VOP_UNLOCK(tdvp); atomic_add_int(&rename_restarts, 1); goto relock; } /* * Re-resolve fvp to be certain it still exists and fetch the * correct vnode. */ error = ufs_lookup_ino(fdvp, NULL, fcnp, &ino); if (error) { VOP_UNLOCK(fdvp); VOP_UNLOCK(tdvp); goto releout; } error = VFS_VGET(mp, ino, LK_EXCLUSIVE | LK_NOWAIT, &nvp); if (error) { VOP_UNLOCK(fdvp); VOP_UNLOCK(tdvp); if (error != EBUSY) goto releout; error = VFS_VGET(mp, ino, LK_EXCLUSIVE, &nvp); if (error != 0) goto releout; VOP_UNLOCK(nvp); vrele(fvp); fvp = nvp; atomic_add_int(&rename_restarts, 1); goto relock; } vrele(fvp); fvp = nvp; /* * Re-resolve tvp and acquire the vnode lock if present. */ error = ufs_lookup_ino(tdvp, NULL, tcnp, &ino); if (error != 0 && error != EJUSTRETURN) { VOP_UNLOCK(fdvp); VOP_UNLOCK(tdvp); VOP_UNLOCK(fvp); goto releout; } /* * If tvp disappeared we just carry on. */ if (error == EJUSTRETURN && tvp != NULL) { vrele(tvp); tvp = NULL; } /* * Get the tvp ino if the lookup succeeded. We may have to restart * if the non-blocking acquire fails. */ if (error == 0) { nvp = NULL; error = VFS_VGET(mp, ino, LK_EXCLUSIVE | LK_NOWAIT, &nvp); if (tvp) vrele(tvp); tvp = nvp; if (error) { VOP_UNLOCK(fdvp); VOP_UNLOCK(tdvp); VOP_UNLOCK(fvp); if (error != EBUSY) goto releout; error = VFS_VGET(mp, ino, LK_EXCLUSIVE, &nvp); if (error != 0) goto releout; vput(nvp); atomic_add_int(&rename_restarts, 1); goto relock; } } fdp = VTOI(fdvp); fip = VTOI(fvp); tdp = VTOI(tdvp); tip = NULL; if (tvp) tip = VTOI(tvp); if (tvp && ((VTOI(tvp)->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || (VTOI(tdvp)->i_flags & APPEND))) { error = EPERM; goto unlockout; } /* * Renaming a file to itself has no effect. The upper layers should * not call us in that case. However, things could change after * we drop the locks above. */ if (fvp == tvp) { error = 0; goto unlockout; } doingdirectory = 0; newparent = 0; ino = fip->i_number; if (fip->i_nlink >= UFS_LINK_MAX) { error = EMLINK; goto unlockout; } if ((fip->i_flags & (NOUNLINK | IMMUTABLE | APPEND)) || (fdp->i_flags & APPEND)) { error = EPERM; goto unlockout; } if ((fip->i_mode & IFMT) == IFDIR) { /* * Avoid ".", "..", and aliases of "." for obvious reasons. */ if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || fdp == fip || (fcnp->cn_flags | tcnp->cn_flags) & ISDOTDOT) { error = EINVAL; goto unlockout; } if (fdp->i_number != tdp->i_number) newparent = tdp->i_number; doingdirectory = 1; } if ((fvp->v_type == VDIR && fvp->v_mountedhere != NULL) || (tvp != NULL && tvp->v_type == VDIR && tvp->v_mountedhere != NULL)) { error = EXDEV; goto unlockout; } /* * If ".." must be changed (ie the directory gets a new * parent) then the source directory must not be in the * directory hierarchy above the target, as this would * orphan everything below the source directory. Also * the user must have write permission in the source so * as to be able to change "..". */ if (doingdirectory && newparent) { error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred, tcnp->cn_thread); if (error) goto unlockout; error = ufs_checkpath(ino, fdp->i_number, tdp, tcnp->cn_cred, &ino); /* * We encountered a lock that we have to wait for. Unlock * everything else and VGET before restarting. */ if (ino) { VOP_UNLOCK(fdvp); VOP_UNLOCK(fvp); VOP_UNLOCK(tdvp); if (tvp) VOP_UNLOCK(tvp); error = VFS_VGET(mp, ino, LK_SHARED, &nvp); if (error == 0) vput(nvp); atomic_add_int(&rename_restarts, 1); goto relock; } if (error) goto unlockout; if ((tcnp->cn_flags & SAVESTART) == 0) panic("ufs_rename: lost to startdir"); } if (fip->i_effnlink == 0 || fdp->i_effnlink == 0 || tdp->i_effnlink == 0) panic("Bad effnlink fip %p, fdp %p, tdp %p", fip, fdp, tdp); if (tvp != NULL) vn_seqc_write_begin(tvp); vn_seqc_write_begin(tdvp); vn_seqc_write_begin(fvp); vn_seqc_write_begin(fdvp); want_seqc_end = true; /* * 1) Bump link count while we're moving stuff * around. If we crash somewhere before * completing our work, the link count * may be wrong, but correctable. */ fip->i_effnlink++; fip->i_nlink++; DIP_SET(fip, i_nlink, fip->i_nlink); UFS_INODE_SET_FLAG(fip, IN_CHANGE); if (DOINGSOFTDEP(fvp)) softdep_setup_link(tdp, fip); error = UFS_UPDATE(fvp, !DOINGSOFTDEP(fvp) && !DOINGASYNC(fvp)); if (error) goto bad; /* * 2) If target doesn't exist, link the target * to the source and unlink the source. * Otherwise, rewrite the target directory * entry to reference the source inode and * expunge the original entry's existence. */ if (tip == NULL) { if (ITODEV(tdp) != ITODEV(fip)) panic("ufs_rename: EXDEV"); if (doingdirectory && newparent) { /* * Account for ".." in new directory. * When source and destination have the same * parent we don't adjust the link count. The * actual link modification is completed when * .. is rewritten below. */ if (tdp->i_nlink >= UFS_LINK_MAX) { error = EMLINK; goto bad; } } ufs_makedirentry(fip, tcnp, &newdir); error = ufs_direnter(tdvp, NULL, &newdir, tcnp, NULL, 1); if (error) goto bad; /* Setup tdvp for directory compaction if needed. */ if (tdp->i_count && tdp->i_endoff && tdp->i_endoff < tdp->i_size) endoff = tdp->i_endoff; } else { if (ITODEV(tip) != ITODEV(tdp) || ITODEV(tip) != ITODEV(fip)) panic("ufs_rename: EXDEV"); /* * Short circuit rename(foo, foo). */ if (tip->i_number == fip->i_number) panic("ufs_rename: same file"); /* * If the parent directory is "sticky", then the caller * must possess VADMIN for the parent directory, or the * destination of the rename. This implements append-only * directories. */ if ((tdp->i_mode & S_ISTXT) && VOP_ACCESS(tdvp, VADMIN, tcnp->cn_cred, td) && VOP_ACCESS(tvp, VADMIN, tcnp->cn_cred, td)) { error = EPERM; goto bad; } /* * Target must be empty if a directory and have no links * to it. Also, ensure source and target are compatible * (both directories, or both not directories). */ if ((tip->i_mode & IFMT) == IFDIR) { if ((tip->i_effnlink > 2) || !ufs_dirempty(tip, tdp->i_number, tcnp->cn_cred)) { error = ENOTEMPTY; goto bad; } if (!doingdirectory) { error = ENOTDIR; goto bad; } cache_purge(tdvp); } else if (doingdirectory) { error = EISDIR; goto bad; } if (doingdirectory) { if (!newparent) { tdp->i_effnlink--; if (DOINGSOFTDEP(tdvp)) softdep_change_linkcnt(tdp); } tip->i_effnlink--; if (DOINGSOFTDEP(tvp)) softdep_change_linkcnt(tip); } error = ufs_dirrewrite(tdp, tip, fip->i_number, IFTODT(fip->i_mode), (doingdirectory && newparent) ? newparent : doingdirectory); if (error) { if (doingdirectory) { if (!newparent) { tdp->i_effnlink++; if (DOINGSOFTDEP(tdvp)) softdep_change_linkcnt(tdp); } tip->i_effnlink++; if (DOINGSOFTDEP(tvp)) softdep_change_linkcnt(tip); } goto bad; } if (doingdirectory && !DOINGSOFTDEP(tvp)) { /* * The only stuff left in the directory is "." * and "..". The "." reference is inconsequential * since we are quashing it. We have removed the "." * reference and the reference in the parent directory, * but there may be other hard links. The soft * dependency code will arrange to do these operations * after the parent directory entry has been deleted on * disk, so when running with that code we avoid doing * them now. */ if (!newparent) { tdp->i_nlink--; DIP_SET(tdp, i_nlink, tdp->i_nlink); UFS_INODE_SET_FLAG(tdp, IN_CHANGE); } tip->i_nlink--; DIP_SET(tip, i_nlink, tip->i_nlink); UFS_INODE_SET_FLAG(tip, IN_CHANGE); } } /* * 3) Unlink the source. We have to resolve the path again to * fixup the directory offset and count for ufs_dirremove. */ if (fdvp == tdvp) { error = ufs_lookup_ino(fdvp, NULL, fcnp, &ino); if (error) panic("ufs_rename: from entry went away!"); if (ino != fip->i_number) panic("ufs_rename: ino mismatch %ju != %ju\n", (uintmax_t)ino, (uintmax_t)fip->i_number); } /* * If the source is a directory with a * new parent, the link count of the old * parent directory must be decremented * and ".." set to point to the new parent. */ if (doingdirectory && newparent) { /* * If tip exists we simply use its link, otherwise we must * add a new one. */ if (tip == NULL) { tdp->i_effnlink++; tdp->i_nlink++; DIP_SET(tdp, i_nlink, tdp->i_nlink); UFS_INODE_SET_FLAG(tdp, IN_CHANGE); if (DOINGSOFTDEP(tdvp)) softdep_setup_dotdot_link(tdp, fip); error = UFS_UPDATE(tdvp, !DOINGSOFTDEP(tdvp) && !DOINGASYNC(tdvp)); /* Don't go to bad here as the new link exists. */ if (error) goto unlockout; } else if (DOINGSUJ(tdvp)) /* Journal must account for each new link. */ softdep_setup_dotdot_link(tdp, fip); fip->i_offset = mastertemplate.dot_reclen; ufs_dirrewrite(fip, fdp, newparent, DT_DIR, 0); cache_purge(fdvp); } error = ufs_dirremove(fdvp, fip, fcnp->cn_flags, 0); /* * The kern_renameat() looks up the fvp using the DELETE flag, which * causes the removal of the name cache entry for fvp. * As the relookup of the fvp is done in two steps: * ufs_lookup_ino() and then VFS_VGET(), another thread might do a * normal lookup of the from name just before the VFS_VGET() call, * causing the cache entry to be re-instantiated. * * The same issue also applies to tvp if it exists as * otherwise we may have a stale name cache entry for the new * name that references the old i-node if it has other links * or open file descriptors. */ cache_purge(fvp); if (tvp) cache_purge(tvp); cache_purge_negative(tdvp); unlockout: if (want_seqc_end) { if (tvp != NULL) vn_seqc_write_end(tvp); vn_seqc_write_end(tdvp); vn_seqc_write_end(fvp); vn_seqc_write_end(fdvp); } vput(fdvp); vput(fvp); if (tvp) vput(tvp); /* * If compaction or fsync was requested do it now that other locks * are no longer needed. */ if (error == 0 && endoff != 0) { error = UFS_TRUNCATE(tdvp, endoff, IO_NORMAL | (DOINGASYNC(tdvp) ? 0 : IO_SYNC), tcnp->cn_cred); if (error != 0 && !ffs_fsfail_cleanup(VFSTOUFS(mp), error)) vn_printf(tdvp, "ufs_rename: failed to truncate, error %d\n", error); #ifdef UFS_DIRHASH if (error != 0) ufsdirhash_free(tdp); else if (tdp->i_dirhash != NULL) ufsdirhash_dirtrunc(tdp, endoff); #endif /* * Even if the directory compaction failed, rename was * succesful. Do not propagate a UFS_TRUNCATE() error * to the caller. */ error = 0; } if (error == 0 && tdp->i_flag & IN_NEEDSYNC) error = VOP_FSYNC(tdvp, MNT_WAIT, td); vput(tdvp); return (error); bad: fip->i_effnlink--; fip->i_nlink--; DIP_SET(fip, i_nlink, fip->i_nlink); UFS_INODE_SET_FLAG(fip, IN_CHANGE); if (DOINGSOFTDEP(fvp)) softdep_revert_link(tdp, fip); goto unlockout; releout: if (want_seqc_end) { if (tvp != NULL) vn_seqc_write_end(tvp); vn_seqc_write_end(tdvp); vn_seqc_write_end(fvp); vn_seqc_write_end(fdvp); } vrele(fdvp); vrele(fvp); vrele(tdvp); if (tvp) vrele(tvp); return (error); } #ifdef UFS_ACL static int ufs_do_posix1e_acl_inheritance_dir(struct vnode *dvp, struct vnode *tvp, mode_t dmode, struct ucred *cred, struct thread *td) { int error; struct inode *ip = VTOI(tvp); struct acl *dacl, *acl; acl = acl_alloc(M_WAITOK); dacl = acl_alloc(M_WAITOK); /* * Retrieve default ACL from parent, if any. */ error = VOP_GETACL(dvp, ACL_TYPE_DEFAULT, acl, cred, td); switch (error) { case 0: /* * Retrieved a default ACL, so merge mode and ACL if * necessary. If the ACL is empty, fall through to * the "not defined or available" case. */ if (acl->acl_cnt != 0) { dmode = acl_posix1e_newfilemode(dmode, acl); UFS_INODE_SET_MODE(ip, dmode); DIP_SET(ip, i_mode, dmode); *dacl = *acl; ufs_sync_acl_from_inode(ip, acl); break; } /* FALLTHROUGH */ case EOPNOTSUPP: /* * Just use the mode as-is. */ UFS_INODE_SET_MODE(ip, dmode); DIP_SET(ip, i_mode, dmode); error = 0; goto out; default: goto out; } /* * XXX: If we abort now, will Soft Updates notify the extattr * code that the EAs for the file need to be released? */ error = VOP_SETACL(tvp, ACL_TYPE_ACCESS, acl, cred, td); if (error == 0) error = VOP_SETACL(tvp, ACL_TYPE_DEFAULT, dacl, cred, td); switch (error) { case 0: break; case EOPNOTSUPP: /* * XXX: This should not happen, as EOPNOTSUPP above * was supposed to free acl. */ printf("ufs_mkdir: VOP_GETACL() but no VOP_SETACL()\n"); /* panic("ufs_mkdir: VOP_GETACL() but no VOP_SETACL()"); */ break; default: goto out; } out: acl_free(acl); acl_free(dacl); return (error); } static int ufs_do_posix1e_acl_inheritance_file(struct vnode *dvp, struct vnode *tvp, mode_t mode, struct ucred *cred, struct thread *td) { int error; struct inode *ip = VTOI(tvp); struct acl *acl; acl = acl_alloc(M_WAITOK); /* * Retrieve default ACL for parent, if any. */ error = VOP_GETACL(dvp, ACL_TYPE_DEFAULT, acl, cred, td); switch (error) { case 0: /* * Retrieved a default ACL, so merge mode and ACL if * necessary. */ if (acl->acl_cnt != 0) { /* * Two possible ways for default ACL to not * be present. First, the EA can be * undefined, or second, the default ACL can * be blank. If it's blank, fall through to * the it's not defined case. */ mode = acl_posix1e_newfilemode(mode, acl); UFS_INODE_SET_MODE(ip, mode); DIP_SET(ip, i_mode, mode); ufs_sync_acl_from_inode(ip, acl); break; } /* FALLTHROUGH */ case EOPNOTSUPP: /* * Just use the mode as-is. */ UFS_INODE_SET_MODE(ip, mode); DIP_SET(ip, i_mode, mode); error = 0; goto out; default: goto out; } /* * XXX: If we abort now, will Soft Updates notify the extattr * code that the EAs for the file need to be released? */ error = VOP_SETACL(tvp, ACL_TYPE_ACCESS, acl, cred, td); switch (error) { case 0: break; case EOPNOTSUPP: /* * XXX: This should not happen, as EOPNOTSUPP above was * supposed to free acl. */ printf("ufs_do_posix1e_acl_inheritance_file: VOP_GETACL() " "but no VOP_SETACL()\n"); /* panic("ufs_do_posix1e_acl_inheritance_file: VOP_GETACL() " "but no VOP_SETACL()"); */ break; default: goto out; } out: acl_free(acl); return (error); } static int ufs_do_nfs4_acl_inheritance(struct vnode *dvp, struct vnode *tvp, mode_t child_mode, struct ucred *cred, struct thread *td) { int error; struct acl *parent_aclp, *child_aclp; parent_aclp = acl_alloc(M_WAITOK); child_aclp = acl_alloc(M_WAITOK | M_ZERO); error = ufs_getacl_nfs4_internal(dvp, parent_aclp, td); if (error) goto out; acl_nfs4_compute_inherited_acl(parent_aclp, child_aclp, child_mode, VTOI(tvp)->i_uid, tvp->v_type == VDIR); error = ufs_setacl_nfs4_internal(tvp, child_aclp, td); if (error) goto out; out: acl_free(parent_aclp); acl_free(child_aclp); return (error); } #endif /* * Mkdir system call */ static int ufs_mkdir(ap) struct vop_mkdir_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap; { struct vnode *dvp = ap->a_dvp; struct vattr *vap = ap->a_vap; struct componentname *cnp = ap->a_cnp; struct inode *ip, *dp; struct vnode *tvp; struct buf *bp; struct dirtemplate dirtemplate, *dtp; struct direct newdir; int error, dmode; long blkoff; #ifdef INVARIANTS if ((cnp->cn_flags & HASBUF) == 0) panic("ufs_mkdir: no name"); #endif dp = VTOI(dvp); if (dp->i_nlink >= UFS_LINK_MAX) { error = EMLINK; goto out; } dmode = vap->va_mode & 0777; dmode |= IFDIR; /* * Must simulate part of ufs_makeinode here to acquire the inode, * but not have it entered in the parent directory. The entry is * made later after writing "." and ".." entries. */ if (dp->i_effnlink < 2) { print_bad_link_count("ufs_mkdir", dvp); error = EINVAL; goto out; } error = UFS_VALLOC(dvp, dmode, cnp->cn_cred, &tvp); if (error) goto out; vn_seqc_write_begin(tvp); ip = VTOI(tvp); ip->i_gid = dp->i_gid; DIP_SET(ip, i_gid, dp->i_gid); #ifdef SUIDDIR { #ifdef QUOTA struct ucred ucred, *ucp; gid_t ucred_group; ucp = cnp->cn_cred; #endif /* * If we are hacking owners here, (only do this where told to) * and we are not giving it TO root, (would subvert quotas) * then go ahead and give it to the other user. * The new directory also inherits the SUID bit. * If user's UID and dir UID are the same, * 'give it away' so that the SUID is still forced on. */ if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) && (dp->i_mode & ISUID) && dp->i_uid) { dmode |= ISUID; ip->i_uid = dp->i_uid; DIP_SET(ip, i_uid, dp->i_uid); #ifdef QUOTA if (dp->i_uid != cnp->cn_cred->cr_uid) { /* * Make sure the correct user gets charged * for the space. * Make a dummy credential for the victim. * XXX This seems to never be accessed out of * our context so a stack variable is ok. */ refcount_init(&ucred.cr_ref, 1); ucred.cr_uid = ip->i_uid; ucred.cr_ngroups = 1; ucred.cr_groups = &ucred_group; ucred.cr_groups[0] = dp->i_gid; ucp = &ucred; } #endif } else { ip->i_uid = cnp->cn_cred->cr_uid; DIP_SET(ip, i_uid, ip->i_uid); } #ifdef QUOTA if ((error = getinoquota(ip)) || (error = chkiq(ip, 1, ucp, 0))) { if (DOINGSOFTDEP(tvp)) softdep_revert_link(dp, ip); UFS_VFREE(tvp, ip->i_number, dmode); vn_seqc_write_end(tvp); vgone(tvp); vput(tvp); return (error); } #endif } #else /* !SUIDDIR */ ip->i_uid = cnp->cn_cred->cr_uid; DIP_SET(ip, i_uid, ip->i_uid); #ifdef QUOTA if ((error = getinoquota(ip)) || (error = chkiq(ip, 1, cnp->cn_cred, 0))) { if (DOINGSOFTDEP(tvp)) softdep_revert_link(dp, ip); UFS_VFREE(tvp, ip->i_number, dmode); vn_seqc_write_end(tvp); vgone(tvp); vput(tvp); return (error); } #endif #endif /* !SUIDDIR */ UFS_INODE_SET_FLAG(ip, IN_ACCESS | IN_CHANGE | IN_UPDATE); UFS_INODE_SET_MODE(ip, dmode); DIP_SET(ip, i_mode, dmode); tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ ip->i_effnlink = 2; ip->i_nlink = 2; DIP_SET(ip, i_nlink, 2); if (cnp->cn_flags & ISWHITEOUT) { ip->i_flags |= UF_OPAQUE; DIP_SET(ip, i_flags, ip->i_flags); } /* * Bump link count in parent directory to reflect work done below. * Should be done before reference is created so cleanup is * possible if we crash. */ dp->i_effnlink++; dp->i_nlink++; DIP_SET(dp, i_nlink, dp->i_nlink); UFS_INODE_SET_FLAG(dp, IN_CHANGE); if (DOINGSOFTDEP(dvp)) softdep_setup_mkdir(dp, ip); error = UFS_UPDATE(dvp, !DOINGSOFTDEP(dvp) && !DOINGASYNC(dvp)); if (error) goto bad; #ifdef MAC if (dvp->v_mount->mnt_flag & MNT_MULTILABEL) { error = mac_vnode_create_extattr(cnp->cn_cred, dvp->v_mount, dvp, tvp, cnp); if (error) goto bad; } #endif #ifdef UFS_ACL if (dvp->v_mount->mnt_flag & MNT_ACLS) { error = ufs_do_posix1e_acl_inheritance_dir(dvp, tvp, dmode, cnp->cn_cred, cnp->cn_thread); if (error) goto bad; } else if (dvp->v_mount->mnt_flag & MNT_NFS4ACLS) { error = ufs_do_nfs4_acl_inheritance(dvp, tvp, dmode, cnp->cn_cred, cnp->cn_thread); if (error) goto bad; } #endif /* !UFS_ACL */ /* * Initialize directory with "." and ".." from static template. */ if (dvp->v_mount->mnt_maxsymlinklen > 0) dtp = &mastertemplate; else dtp = (struct dirtemplate *)&omastertemplate; dirtemplate = *dtp; dirtemplate.dot_ino = ip->i_number; dirtemplate.dotdot_ino = dp->i_number; vnode_pager_setsize(tvp, DIRBLKSIZ); if ((error = UFS_BALLOC(tvp, (off_t)0, DIRBLKSIZ, cnp->cn_cred, BA_CLRBUF, &bp)) != 0) goto bad; ip->i_size = DIRBLKSIZ; DIP_SET(ip, i_size, DIRBLKSIZ); UFS_INODE_SET_FLAG(ip, IN_SIZEMOD | IN_CHANGE | IN_UPDATE); bcopy((caddr_t)&dirtemplate, (caddr_t)bp->b_data, sizeof dirtemplate); if (DOINGSOFTDEP(tvp)) { /* * Ensure that the entire newly allocated block is a * valid directory so that future growth within the * block does not have to ensure that the block is * written before the inode. */ blkoff = DIRBLKSIZ; while (blkoff < bp->b_bcount) { ((struct direct *) (bp->b_data + blkoff))->d_reclen = DIRBLKSIZ; blkoff += DIRBLKSIZ; } } if ((error = UFS_UPDATE(tvp, !DOINGSOFTDEP(tvp) && !DOINGASYNC(tvp))) != 0) { (void)bwrite(bp); goto bad; } /* * Directory set up, now install its entry in the parent directory. * * If we are not doing soft dependencies, then we must write out the * buffer containing the new directory body before entering the new * name in the parent. If we are doing soft dependencies, then the * buffer containing the new directory body will be passed to and * released in the soft dependency code after the code has attached * an appropriate ordering dependency to the buffer which ensures that * the buffer is written before the new name is written in the parent. */ if (DOINGASYNC(dvp)) bdwrite(bp); else if (!DOINGSOFTDEP(dvp) && ((error = bwrite(bp)))) goto bad; ufs_makedirentry(ip, cnp, &newdir); error = ufs_direnter(dvp, tvp, &newdir, cnp, bp, 0); bad: if (error == 0) { *ap->a_vpp = tvp; vn_seqc_write_end(tvp); } else { dp->i_effnlink--; dp->i_nlink--; DIP_SET(dp, i_nlink, dp->i_nlink); UFS_INODE_SET_FLAG(dp, IN_CHANGE); /* * No need to do an explicit VOP_TRUNCATE here, vrele will * do this for us because we set the link count to 0. */ ip->i_effnlink = 0; ip->i_nlink = 0; DIP_SET(ip, i_nlink, 0); UFS_INODE_SET_FLAG(ip, IN_CHANGE); if (DOINGSOFTDEP(tvp)) softdep_revert_mkdir(dp, ip); vn_seqc_write_end(tvp); vgone(tvp); vput(tvp); } out: return (error); } /* * Rmdir system call. */ static int ufs_rmdir(ap) struct vop_rmdir_args /* { struct vnode *a_dvp; struct vnode *a_vp; struct componentname *a_cnp; } */ *ap; { struct vnode *vp = ap->a_vp; struct vnode *dvp = ap->a_dvp; struct componentname *cnp = ap->a_cnp; struct inode *ip, *dp; int error; ip = VTOI(vp); dp = VTOI(dvp); /* * Do not remove a directory that is in the process of being renamed. * Verify the directory is empty (and valid). Rmdir ".." will not be * valid since ".." will contain a reference to the current directory * and thus be non-empty. Do not allow the removal of mounted on * directories (this can happen when an NFS exported filesystem * tries to remove a locally mounted on directory). */ error = 0; if (dp->i_effnlink <= 2) { if (dp->i_effnlink == 2) print_bad_link_count("ufs_rmdir", dvp); error = EINVAL; goto out; } if (!ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) { error = ENOTEMPTY; goto out; } if ((dp->i_flags & APPEND) || (ip->i_flags & (NOUNLINK | IMMUTABLE | APPEND))) { error = EPERM; goto out; } if (vp->v_mountedhere != 0) { error = EINVAL; goto out; } #ifdef UFS_GJOURNAL ufs_gjournal_orphan(vp); #endif /* * Delete reference to directory before purging * inode. If we crash in between, the directory * will be reattached to lost+found, */ dp->i_effnlink--; ip->i_effnlink--; if (DOINGSOFTDEP(vp)) softdep_setup_rmdir(dp, ip); error = ufs_dirremove(dvp, ip, cnp->cn_flags, 1); if (error) { dp->i_effnlink++; ip->i_effnlink++; if (DOINGSOFTDEP(vp)) softdep_revert_rmdir(dp, ip); goto out; } cache_purge(dvp); /* * The only stuff left in the directory is "." and "..". The "." * reference is inconsequential since we are quashing it. The soft * dependency code will arrange to do these operations after * the parent directory entry has been deleted on disk, so * when running with that code we avoid doing them now. */ if (!DOINGSOFTDEP(vp)) { dp->i_nlink--; DIP_SET(dp, i_nlink, dp->i_nlink); UFS_INODE_SET_FLAG(dp, IN_CHANGE); error = UFS_UPDATE(dvp, 0); ip->i_nlink--; DIP_SET(ip, i_nlink, ip->i_nlink); UFS_INODE_SET_FLAG(ip, IN_CHANGE); } cache_purge(vp); #ifdef UFS_DIRHASH /* Kill any active hash; i_effnlink == 0, so it will not come back. */ if (ip->i_dirhash != NULL) ufsdirhash_free(ip); #endif out: return (error); } /* * symlink -- make a symbolic link */ static int ufs_symlink(ap) struct vop_symlink_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; const char *a_target; } */ *ap; { struct vnode *vp, **vpp = ap->a_vpp; struct inode *ip; int len, error; error = ufs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, vpp, ap->a_cnp, "ufs_symlink"); if (error) return (error); vp = *vpp; len = strlen(ap->a_target); if (len < vp->v_mount->mnt_maxsymlinklen) { ip = VTOI(vp); bcopy(ap->a_target, SHORTLINK(ip), len); ip->i_size = len; DIP_SET(ip, i_size, len); UFS_INODE_SET_FLAG(ip, IN_SIZEMOD | IN_CHANGE | IN_UPDATE); error = UFS_UPDATE(vp, 0); } else error = vn_rdwr(UIO_WRITE, vp, __DECONST(void *, ap->a_target), len, (off_t)0, UIO_SYSSPACE, IO_NODELOCKED | IO_NOMACCHECK, ap->a_cnp->cn_cred, NOCRED, NULL, NULL); if (error) vput(vp); return (error); } /* * Vnode op for reading directories. */ int ufs_readdir(ap) struct vop_readdir_args /* { struct vnode *a_vp; struct uio *a_uio; struct ucred *a_cred; int *a_eofflag; int *a_ncookies; u_long **a_cookies; } */ *ap; { struct vnode *vp = ap->a_vp; struct uio *uio = ap->a_uio; struct buf *bp; struct inode *ip; struct direct *dp, *edp; u_long *cookies; struct dirent dstdp; off_t offset, startoffset; size_t readcnt, skipcnt; ssize_t startresid; u_int ncookies; int error; if (uio->uio_offset < 0) return (EINVAL); ip = VTOI(vp); if (ip->i_effnlink == 0) return (0); if (ap->a_ncookies != NULL) { if (uio->uio_resid < 0) ncookies = 0; else ncookies = uio->uio_resid; if (uio->uio_offset >= ip->i_size) ncookies = 0; else if (ip->i_size - uio->uio_offset < ncookies) ncookies = ip->i_size - uio->uio_offset; ncookies = ncookies / (offsetof(struct direct, d_name) + 4) + 1; cookies = malloc(ncookies * sizeof(*cookies), M_TEMP, M_WAITOK); *ap->a_ncookies = ncookies; *ap->a_cookies = cookies; } else { ncookies = 0; cookies = NULL; } offset = startoffset = uio->uio_offset; startresid = uio->uio_resid; error = 0; while (error == 0 && uio->uio_resid > 0 && uio->uio_offset < ip->i_size) { error = UFS_BLKATOFF(vp, uio->uio_offset, NULL, &bp); if (error) break; if (bp->b_offset + bp->b_bcount > ip->i_size) readcnt = ip->i_size - bp->b_offset; else readcnt = bp->b_bcount; skipcnt = (size_t)(uio->uio_offset - bp->b_offset) & ~(size_t)(DIRBLKSIZ - 1); offset = bp->b_offset + skipcnt; dp = (struct direct *)&bp->b_data[skipcnt]; edp = (struct direct *)&bp->b_data[readcnt]; while (error == 0 && uio->uio_resid > 0 && dp < edp) { if (dp->d_reclen <= offsetof(struct direct, d_name) || (caddr_t)dp + dp->d_reclen > (caddr_t)edp) { error = EIO; break; } #if BYTE_ORDER == LITTLE_ENDIAN /* Old filesystem format. */ if (vp->v_mount->mnt_maxsymlinklen <= 0) { dstdp.d_namlen = dp->d_type; dstdp.d_type = dp->d_namlen; } else #endif { dstdp.d_namlen = dp->d_namlen; dstdp.d_type = dp->d_type; } if (offsetof(struct direct, d_name) + dstdp.d_namlen > dp->d_reclen) { error = EIO; break; } if (offset < startoffset || dp->d_ino == 0) goto nextentry; dstdp.d_fileno = dp->d_ino; dstdp.d_reclen = GENERIC_DIRSIZ(&dstdp); bcopy(dp->d_name, dstdp.d_name, dstdp.d_namlen); /* NOTE: d_off is the offset of the *next* entry. */ dstdp.d_off = offset + dp->d_reclen; dirent_terminate(&dstdp); if (dstdp.d_reclen > uio->uio_resid) { if (uio->uio_resid == startresid) error = EINVAL; else error = EJUSTRETURN; break; } /* Advance dp. */ error = uiomove((caddr_t)&dstdp, dstdp.d_reclen, uio); if (error) break; if (cookies != NULL) { KASSERT(ncookies > 0, ("ufs_readdir: cookies buffer too small")); *cookies = offset + dp->d_reclen; cookies++; ncookies--; } nextentry: offset += dp->d_reclen; dp = (struct direct *)((caddr_t)dp + dp->d_reclen); } bqrelse(bp); uio->uio_offset = offset; } /* We need to correct uio_offset. */ uio->uio_offset = offset; if (error == EJUSTRETURN) error = 0; if (ap->a_ncookies != NULL) { if (error == 0) { ap->a_ncookies -= ncookies; } else { free(*ap->a_cookies, M_TEMP); *ap->a_ncookies = 0; *ap->a_cookies = NULL; } } if (error == 0 && ap->a_eofflag) *ap->a_eofflag = ip->i_size <= uio->uio_offset; return (error); } /* * Return target name of a symbolic link */ static int ufs_readlink(ap) struct vop_readlink_args /* { struct vnode *a_vp; struct uio *a_uio; struct ucred *a_cred; } */ *ap; { struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); doff_t isize; isize = ip->i_size; if ((isize < vp->v_mount->mnt_maxsymlinklen) || DIP(ip, i_blocks) == 0) { /* XXX - for old fastlink support */ return (uiomove(SHORTLINK(ip), isize, ap->a_uio)); } return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); } /* * Calculate the logical to physical mapping if not done already, * then call the device strategy routine. * * In order to be able to swap to a file, the ufs_bmaparray() operation may not * deadlock on memory. See ufs_bmap() for details. */ static int ufs_strategy(ap) struct vop_strategy_args /* { struct vnode *a_vp; struct buf *a_bp; } */ *ap; { struct buf *bp = ap->a_bp; struct vnode *vp = ap->a_vp; ufs2_daddr_t blkno; int error; if (bp->b_blkno == bp->b_lblkno) { error = ufs_bmaparray(vp, bp->b_lblkno, &blkno, bp, NULL, NULL); bp->b_blkno = blkno; if (error) { bp->b_error = error; bp->b_ioflags |= BIO_ERROR; bufdone(bp); return (0); } if ((long)bp->b_blkno == -1) vfs_bio_clrbuf(bp); } if ((long)bp->b_blkno == -1) { bufdone(bp); return (0); } bp->b_iooffset = dbtob(bp->b_blkno); BO_STRATEGY(VFSTOUFS(vp->v_mount)->um_bo, bp); return (0); } /* * Print out the contents of an inode. */ static int ufs_print(ap) struct vop_print_args /* { struct vnode *a_vp; } */ *ap; { struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); printf("\tnlink=%d, effnlink=%d, size=%jd", ip->i_nlink, ip->i_effnlink, (intmax_t)ip->i_size); if (I_IS_UFS2(ip)) printf(", extsize %d", ip->i_din2->di_extsize); printf("\n\tgeneration=%jx, uid=%d, gid=%d, flags=0x%b\n", (uintmax_t)ip->i_gen, ip->i_uid, ip->i_gid, (u_int)ip->i_flags, PRINT_INODE_FLAGS); printf("\tino %lu, on dev %s", (u_long)ip->i_number, devtoname(ITODEV(ip))); if (vp->v_type == VFIFO) fifo_printinfo(vp); printf("\n"); return (0); } /* * Close wrapper for fifos. * * Update the times on the inode then do device close. */ static int ufsfifo_close(ap) struct vop_close_args /* { struct vnode *a_vp; int a_fflag; struct ucred *a_cred; struct thread *a_td; } */ *ap; { struct vnode *vp = ap->a_vp; int usecount; VI_LOCK(vp); usecount = vp->v_usecount; if (usecount > 1) ufs_itimes_locked(vp); VI_UNLOCK(vp); return (fifo_specops.vop_close(ap)); } /* * Kqfilter wrapper for fifos. * * Fall through to ufs kqfilter routines if needed */ static int ufsfifo_kqfilter(ap) struct vop_kqfilter_args *ap; { int error; error = fifo_specops.vop_kqfilter(ap); if (error) error = vfs_kqfilter(ap); return (error); } /* * Return POSIX pathconf information applicable to ufs filesystems. */ static int ufs_pathconf(ap) struct vop_pathconf_args /* { struct vnode *a_vp; int a_name; int *a_retval; } */ *ap; { int error; error = 0; switch (ap->a_name) { case _PC_LINK_MAX: *ap->a_retval = UFS_LINK_MAX; break; case _PC_NAME_MAX: *ap->a_retval = UFS_MAXNAMLEN; break; case _PC_PIPE_BUF: if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO) *ap->a_retval = PIPE_BUF; else error = EINVAL; break; case _PC_CHOWN_RESTRICTED: *ap->a_retval = 1; break; case _PC_NO_TRUNC: *ap->a_retval = 1; break; #ifdef UFS_ACL case _PC_ACL_EXTENDED: if (ap->a_vp->v_mount->mnt_flag & MNT_ACLS) *ap->a_retval = 1; else *ap->a_retval = 0; break; case _PC_ACL_NFS4: if (ap->a_vp->v_mount->mnt_flag & MNT_NFS4ACLS) *ap->a_retval = 1; else *ap->a_retval = 0; break; #endif case _PC_ACL_PATH_MAX: #ifdef UFS_ACL if (ap->a_vp->v_mount->mnt_flag & (MNT_ACLS | MNT_NFS4ACLS)) *ap->a_retval = ACL_MAX_ENTRIES; else *ap->a_retval = 3; #else *ap->a_retval = 3; #endif break; #ifdef MAC case _PC_MAC_PRESENT: if (ap->a_vp->v_mount->mnt_flag & MNT_MULTILABEL) *ap->a_retval = 1; else *ap->a_retval = 0; break; #endif case _PC_MIN_HOLE_SIZE: *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize; break; case _PC_PRIO_IO: *ap->a_retval = 0; break; case _PC_SYNC_IO: *ap->a_retval = 0; break; case _PC_ALLOC_SIZE_MIN: *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_bsize; break; case _PC_FILESIZEBITS: *ap->a_retval = 64; break; case _PC_REC_INCR_XFER_SIZE: *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize; break; case _PC_REC_MAX_XFER_SIZE: *ap->a_retval = -1; /* means ``unlimited'' */ break; case _PC_REC_MIN_XFER_SIZE: *ap->a_retval = ap->a_vp->v_mount->mnt_stat.f_iosize; break; case _PC_REC_XFER_ALIGN: *ap->a_retval = PAGE_SIZE; break; case _PC_SYMLINK_MAX: *ap->a_retval = MAXPATHLEN; break; default: error = vop_stdpathconf(ap); break; } return (error); } /* * Initialize the vnode associated with a new inode, handle aliased * vnodes. */ int ufs_vinit(mntp, fifoops, vpp) struct mount *mntp; struct vop_vector *fifoops; struct vnode **vpp; { struct inode *ip; struct vnode *vp; vp = *vpp; ASSERT_VOP_LOCKED(vp, "ufs_vinit"); ip = VTOI(vp); vp->v_type = IFTOVT(ip->i_mode); /* * Only unallocated inodes should be of type VNON. */ if (ip->i_mode != 0 && vp->v_type == VNON) return (EINVAL); if (vp->v_type == VFIFO) vp->v_op = fifoops; if (ip->i_number == UFS_ROOTINO) vp->v_vflag |= VV_ROOT; *vpp = vp; return (0); } /* * Allocate a new inode. * Vnode dvp must be locked. */ static int ufs_makeinode(mode, dvp, vpp, cnp, callfunc) int mode; struct vnode *dvp; struct vnode **vpp; struct componentname *cnp; const char *callfunc; { struct inode *ip, *pdir; struct direct newdir; struct vnode *tvp; int error; pdir = VTOI(dvp); #ifdef INVARIANTS if ((cnp->cn_flags & HASBUF) == 0) panic("%s: no name", callfunc); #endif *vpp = NULL; if ((mode & IFMT) == 0) mode |= IFREG; if (pdir->i_effnlink < 2) { print_bad_link_count(callfunc, dvp); return (EINVAL); } error = UFS_VALLOC(dvp, mode, cnp->cn_cred, &tvp); if (error) return (error); ip = VTOI(tvp); ip->i_gid = pdir->i_gid; DIP_SET(ip, i_gid, pdir->i_gid); #ifdef SUIDDIR { #ifdef QUOTA struct ucred ucred, *ucp; gid_t ucred_group; ucp = cnp->cn_cred; #endif /* * If we are not the owner of the directory, * and we are hacking owners here, (only do this where told to) * and we are not giving it TO root, (would subvert quotas) * then go ahead and give it to the other user. * Note that this drops off the execute bits for security. */ if ((dvp->v_mount->mnt_flag & MNT_SUIDDIR) && (pdir->i_mode & ISUID) && (pdir->i_uid != cnp->cn_cred->cr_uid) && pdir->i_uid) { ip->i_uid = pdir->i_uid; DIP_SET(ip, i_uid, ip->i_uid); mode &= ~07111; #ifdef QUOTA /* * Make sure the correct user gets charged * for the space. * Quickly knock up a dummy credential for the victim. * XXX This seems to never be accessed out of our * context so a stack variable is ok. */ refcount_init(&ucred.cr_ref, 1); ucred.cr_uid = ip->i_uid; ucred.cr_ngroups = 1; ucred.cr_groups = &ucred_group; ucred.cr_groups[0] = pdir->i_gid; ucp = &ucred; #endif } else { ip->i_uid = cnp->cn_cred->cr_uid; DIP_SET(ip, i_uid, ip->i_uid); } #ifdef QUOTA if ((error = getinoquota(ip)) || (error = chkiq(ip, 1, ucp, 0))) { if (DOINGSOFTDEP(tvp)) softdep_revert_link(pdir, ip); UFS_VFREE(tvp, ip->i_number, mode); vgone(tvp); vput(tvp); return (error); } #endif } #else /* !SUIDDIR */ ip->i_uid = cnp->cn_cred->cr_uid; DIP_SET(ip, i_uid, ip->i_uid); #ifdef QUOTA if ((error = getinoquota(ip)) || (error = chkiq(ip, 1, cnp->cn_cred, 0))) { if (DOINGSOFTDEP(tvp)) softdep_revert_link(pdir, ip); UFS_VFREE(tvp, ip->i_number, mode); vgone(tvp); vput(tvp); return (error); } #endif #endif /* !SUIDDIR */ vn_seqc_write_begin(tvp); /* Mostly to cover asserts */ UFS_INODE_SET_FLAG(ip, IN_ACCESS | IN_CHANGE | IN_UPDATE); UFS_INODE_SET_MODE(ip, mode); DIP_SET(ip, i_mode, mode); tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ ip->i_effnlink = 1; ip->i_nlink = 1; DIP_SET(ip, i_nlink, 1); if (DOINGSOFTDEP(tvp)) softdep_setup_create(VTOI(dvp), ip); if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, cnp->cn_cred) && priv_check_cred(cnp->cn_cred, PRIV_VFS_SETGID)) { UFS_INODE_SET_MODE(ip, ip->i_mode & ~ISGID); DIP_SET(ip, i_mode, ip->i_mode); } if (cnp->cn_flags & ISWHITEOUT) { ip->i_flags |= UF_OPAQUE; DIP_SET(ip, i_flags, ip->i_flags); } /* * Make sure inode goes to disk before directory entry. */ error = UFS_UPDATE(tvp, !DOINGSOFTDEP(tvp) && !DOINGASYNC(tvp)); if (error) goto bad; #ifdef MAC if (dvp->v_mount->mnt_flag & MNT_MULTILABEL) { error = mac_vnode_create_extattr(cnp->cn_cred, dvp->v_mount, dvp, tvp, cnp); if (error) goto bad; } #endif #ifdef UFS_ACL if (dvp->v_mount->mnt_flag & MNT_ACLS) { error = ufs_do_posix1e_acl_inheritance_file(dvp, tvp, mode, cnp->cn_cred, cnp->cn_thread); if (error) goto bad; } else if (dvp->v_mount->mnt_flag & MNT_NFS4ACLS) { error = ufs_do_nfs4_acl_inheritance(dvp, tvp, mode, cnp->cn_cred, cnp->cn_thread); if (error) goto bad; } #endif /* !UFS_ACL */ ufs_makedirentry(ip, cnp, &newdir); error = ufs_direnter(dvp, tvp, &newdir, cnp, NULL, 0); if (error) goto bad; vn_seqc_write_end(tvp); *vpp = tvp; return (0); bad: /* * Write error occurred trying to update the inode * or the directory so must deallocate the inode. */ ip->i_effnlink = 0; ip->i_nlink = 0; DIP_SET(ip, i_nlink, 0); UFS_INODE_SET_FLAG(ip, IN_CHANGE); if (DOINGSOFTDEP(tvp)) softdep_revert_create(VTOI(dvp), ip); vn_seqc_write_end(tvp); vgone(tvp); vput(tvp); return (error); } static int ufs_ioctl(struct vop_ioctl_args *ap) { struct vnode *vp; int error; vp = ap->a_vp; switch (ap->a_command) { case FIOSEEKDATA: error = vn_lock(vp, LK_SHARED); if (error == 0) { error = ufs_bmap_seekdata(vp, (off_t *)ap->a_data); VOP_UNLOCK(vp); } else error = EBADF; return (error); case FIOSEEKHOLE: return (vn_bmap_seekhole(vp, ap->a_command, (off_t *)ap->a_data, ap->a_cred)); default: return (ENOTTY); } } /* Global vfs data structures for ufs. */ struct vop_vector ufs_vnodeops = { .vop_default = &default_vnodeops, .vop_fsync = VOP_PANIC, .vop_read = VOP_PANIC, .vop_reallocblks = VOP_PANIC, .vop_write = VOP_PANIC, .vop_accessx = ufs_accessx, .vop_bmap = ufs_bmap, .vop_fplookup_vexec = ufs_fplookup_vexec, .vop_cachedlookup = ufs_lookup, .vop_close = ufs_close, .vop_create = ufs_create, + .vop_stat = ufs_stat, .vop_getattr = ufs_getattr, .vop_inactive = ufs_inactive, .vop_ioctl = ufs_ioctl, .vop_link = ufs_link, .vop_lookup = vfs_cache_lookup, .vop_mmapped = ufs_mmapped, .vop_mkdir = ufs_mkdir, .vop_mknod = ufs_mknod, .vop_need_inactive = ufs_need_inactive, .vop_open = ufs_open, .vop_pathconf = ufs_pathconf, .vop_poll = vop_stdpoll, .vop_print = ufs_print, .vop_readdir = ufs_readdir, .vop_readlink = ufs_readlink, .vop_reclaim = ufs_reclaim, .vop_remove = ufs_remove, .vop_rename = ufs_rename, .vop_rmdir = ufs_rmdir, .vop_setattr = ufs_setattr, #ifdef MAC .vop_setlabel = vop_stdsetlabel_ea, #endif .vop_strategy = ufs_strategy, .vop_symlink = ufs_symlink, .vop_whiteout = ufs_whiteout, #ifdef UFS_EXTATTR .vop_getextattr = ufs_getextattr, .vop_deleteextattr = ufs_deleteextattr, .vop_setextattr = ufs_setextattr, #endif #ifdef UFS_ACL .vop_getacl = ufs_getacl, .vop_setacl = ufs_setacl, .vop_aclcheck = ufs_aclcheck, #endif }; VFS_VOP_VECTOR_REGISTER(ufs_vnodeops); struct vop_vector ufs_fifoops = { .vop_default = &fifo_specops, .vop_fsync = VOP_PANIC, .vop_accessx = ufs_accessx, .vop_close = ufsfifo_close, .vop_getattr = ufs_getattr, .vop_inactive = ufs_inactive, .vop_kqfilter = ufsfifo_kqfilter, .vop_pathconf = ufs_pathconf, .vop_print = ufs_print, .vop_read = VOP_PANIC, .vop_reclaim = ufs_reclaim, .vop_setattr = ufs_setattr, #ifdef MAC .vop_setlabel = vop_stdsetlabel_ea, #endif .vop_write = VOP_PANIC, #ifdef UFS_EXTATTR .vop_getextattr = ufs_getextattr, .vop_deleteextattr = ufs_deleteextattr, .vop_setextattr = ufs_setextattr, #endif #ifdef UFS_ACL .vop_getacl = ufs_getacl, .vop_setacl = ufs_setacl, .vop_aclcheck = ufs_aclcheck, #endif }; VFS_VOP_VECTOR_REGISTER(ufs_fifoops); diff --git a/tests/sys/net/routing/rtsock_common.h b/tests/sys/net/routing/rtsock_common.h index bad72400941f..7da88e0eb512 100644 --- a/tests/sys/net/routing/rtsock_common.h +++ b/tests/sys/net/routing/rtsock_common.h @@ -1,888 +1,888 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2019 Alexander V. Chernikov * * 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. * * $FreeBSD$ */ #ifndef _NET_ROUTING_RTSOCK_COMMON_H_ #define _NET_ROUTING_RTSOCK_COMMON_H_ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "freebsd_test_suite/macros.h" #include "rtsock_print.h" #include "params.h" void rtsock_update_rtm_len(struct rt_msghdr *rtm); void rtsock_validate_message(char *buffer, ssize_t len); void rtsock_add_rtm_sa(struct rt_msghdr *rtm, int addr_type, struct sockaddr *sa); void file_append_line(char *fname, char *text); static int _rtm_seq = 42; /* * Checks if the interface cloner module is present for @name. */ static int _check_cloner(char *name) { struct if_clonereq ifcr; char *cp, *buf; int idx; int s; int found = 0; s = socket(AF_LOCAL, SOCK_DGRAM, 0); if (s == -1) err(1, "socket(AF_LOCAL,SOCK_DGRAM)"); memset(&ifcr, 0, sizeof(ifcr)); if (ioctl(s, SIOCIFGCLONERS, &ifcr) < 0) err(1, "SIOCIFGCLONERS for count"); buf = malloc(ifcr.ifcr_total * IFNAMSIZ); if (buf == NULL) err(1, "unable to allocate cloner name buffer"); ifcr.ifcr_count = ifcr.ifcr_total; ifcr.ifcr_buffer = buf; if (ioctl(s, SIOCIFGCLONERS, &ifcr) < 0) err(1, "SIOCIFGCLONERS for names"); /* * In case some disappeared in the mean time, clamp it down. */ if (ifcr.ifcr_count > ifcr.ifcr_total) ifcr.ifcr_count = ifcr.ifcr_total; for (cp = buf, idx = 0; idx < ifcr.ifcr_count; idx++, cp += IFNAMSIZ) { if (!strcmp(cp, name)) { found = 1; break; } } free(buf); close(s); return (found); } static char * iface_create(char *ifname_orig) { struct ifreq ifr; int s; char prefix[IFNAMSIZ], ifname[IFNAMSIZ], *result; char *src, *dst; for (src = ifname_orig, dst = prefix; *src && isalpha(*src); src++) *dst++ = *src; *dst = '\0'; memset(&ifr, 0, sizeof(struct ifreq)); s = socket(AF_LOCAL, SOCK_DGRAM, 0); strlcpy(ifr.ifr_name, ifname_orig, sizeof(ifr.ifr_name)); RLOG("creating iface %s %s", prefix, ifr.ifr_name); if (ioctl(s, SIOCIFCREATE2, &ifr) < 0) err(1, "SIOCIFCREATE2"); strlcpy(ifname, ifr.ifr_name, IFNAMSIZ); RLOG("created interface %s", ifname); result = strdup(ifname); file_append_line(IFACES_FNAME, ifname); if (strstr(ifname, "epair") == ifname) { /* call returned epairXXXa, need to add epairXXXb */ ifname[strlen(ifname) - 1] = 'b'; file_append_line(IFACES_FNAME, ifname); } return (result); } static int iface_destroy(char *ifname) { struct ifreq ifr; int s; s = socket(AF_LOCAL, SOCK_DGRAM, 0); strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); RLOG("destroying interface %s", ifname); if (ioctl(s, SIOCIFDESTROY, &ifr) < 0) return (0); return (1); } /* * Open tunneling device such as tuntap and returns fd. */ int iface_open(char *ifname) { char path[256]; snprintf(path, sizeof(path), "/dev/%s", ifname); RLOG("opening interface %s", ifname); int fd = open(path, O_RDWR|O_EXCL); if (fd == -1) { RLOG_ERRNO("unable to open interface %s", ifname); return (-1); } return (fd); } /* * Sets primary IPv4 addr. * Returns 0 on success. */ -inline int +static inline int iface_setup_addr(char *ifname, char *addr, int plen) { char cmd[512]; char *af; if (strchr(addr, ':')) af = "inet6"; else af = "inet"; RLOG("setting af_%s %s/%d on %s", af, addr, plen, ifname); snprintf(cmd, sizeof(cmd), "/sbin/ifconfig %s %s %s/%d", ifname, af, addr, plen); return system(cmd); } /* * Removes primary IPv4 prefix. * Returns 0 on success. */ -inline int +static inline int iface_delete_addr(char *ifname, char *addr) { char cmd[512]; if (strchr(addr, ':')) { RLOG("removing IPv6 %s from %s", addr, ifname); snprintf(cmd, sizeof(cmd), "/sbin/ifconfig %s inet6 %s delete", ifname, addr); } else { RLOG("removing IPv4 %s from %s", addr, ifname); snprintf(cmd, sizeof(cmd), "/sbin/ifconfig %s -alias %s", ifname, addr); } return system(cmd); } int iface_turn_up(char *ifname) { struct ifreq ifr; int s; if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { RLOG_ERRNO("socket"); return (-1); } memset(&ifr, 0, sizeof(struct ifreq)); strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) { RLOG_ERRNO("ioctl(SIOCGIFFLAGS)"); return (-1); } /* Update flags */ if ((ifr.ifr_flags & IFF_UP) == 0) { ifr.ifr_flags |= IFF_UP; if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) { RLOG_ERRNO("ioctl(SIOSGIFFLAGS)"); return (-1); } RLOG("turned interface %s up", ifname); } return (0); } /* * Removes ND6_IFF_IFDISABLED from IPv6 interface flags. * Returns 0 on success. */ int iface_enable_ipv6(char *ifname) { struct in6_ndireq nd; int s; if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { err(1, "socket"); } memset(&nd, 0, sizeof(nd)); strlcpy(nd.ifname, ifname, sizeof(nd.ifname)); if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) { RLOG_ERRNO("ioctl(SIOCGIFINFO_IN6)"); return (-1); } /* Update flags */ if ((nd.ndi.flags & ND6_IFF_IFDISABLED) != 0) { nd.ndi.flags &= ~ND6_IFF_IFDISABLED; if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) { RLOG_ERRNO("ioctl(SIOCSIFINFO_IN6)"); return (-1); } RLOG("enabled IPv6 for %s", ifname); } return (0); } void file_append_line(char *fname, char *text) { FILE *f; f = fopen(fname, "a"); fputs(text, f); fputs("\n", f); fclose(f); } static int vnet_wait_interface(char *vnet_name, char *ifname) { char buf[512], cmd[512], *line, *token; FILE *fp; int i; snprintf(cmd, sizeof(cmd), "/usr/sbin/jexec %s /sbin/ifconfig -l", vnet_name); for (int i = 0; i < 50; i++) { fp = popen(cmd, "r"); line = fgets(buf, sizeof(buf), fp); /* cut last\n */ if (line[0]) line[strlen(line)-1] = '\0'; while ((token = strsep(&line, " ")) != NULL) { if (strcmp(token, ifname) == 0) return (1); } /* sleep 100ms */ usleep(1000 * 100); } return (0); } void vnet_switch(char *vnet_name, char **ifnames, int count) { char buf[512], cmd[512], *line; FILE *fp; int jid, len, ret; RLOG("switching to vnet %s with interface(s) %s", vnet_name, ifnames[0]); len = snprintf(cmd, sizeof(cmd), "/usr/sbin/jail -i -c name=%s persist vnet", vnet_name); for (int i = 0; i < count && len < sizeof(cmd); i++) { len += snprintf(&cmd[len], sizeof(cmd) - len, " vnet.interface=%s", ifnames[i]); } RLOG("jail cmd: \"%s\"\n", cmd); fp = popen(cmd, "r"); if (fp == NULL) atf_tc_fail("jail creation failed"); line = fgets(buf, sizeof(buf), fp); if (line == NULL) atf_tc_fail("empty output from jail(8)"); jid = strtol(line, NULL, 10); if (jid <= 0) { atf_tc_fail("invalid jail output: %s", line); } RLOG("created jail jid=%d", jid); file_append_line(JAILS_FNAME, vnet_name); /* Wait while interface appearsh inside vnet */ for (int i = 0; i < count; i++) { if (vnet_wait_interface(vnet_name, ifnames[i])) continue; atf_tc_fail("unable to move interface %s to jail %s", ifnames[i], vnet_name); } if (jail_attach(jid) == -1) { RLOG_ERRNO("jail %s attach failed: ret=%d", vnet_name, errno); atf_tc_fail("jail attach failed"); } RLOG("attached to the jail"); } void vnet_switch_one(char *vnet_name, char *ifname) { char *ifnames[1]; ifnames[0] = ifname; vnet_switch(vnet_name, ifnames, 1); } #define SA_F_IGNORE_IFNAME 0x01 #define SA_F_IGNORE_IFTYPE 0x02 #define SA_F_IGNORE_MEMCMP 0x04 int sa_equal_msg_flags(const struct sockaddr *a, const struct sockaddr *b, char *msg, size_t sz, int flags) { char a_s[64], b_s[64]; const struct sockaddr_in *a4, *b4; const struct sockaddr_in6 *a6, *b6; const struct sockaddr_dl *al, *bl; if (a == NULL) { snprintf(msg, sz, "first sa is NULL"); return 0; } if (b == NULL) { snprintf(msg, sz, "second sa is NULL"); return 0; } if (a->sa_family != b->sa_family) { snprintf(msg, sz, "family: %d vs %d", a->sa_family, b->sa_family); return 0; } if (a->sa_len != b->sa_len) { snprintf(msg, sz, "len: %d vs %d", a->sa_len, b->sa_len); return 0; } switch (a->sa_family) { case AF_INET: a4 = (const struct sockaddr_in *)a; b4 = (const struct sockaddr_in *)b; if (a4->sin_addr.s_addr != b4->sin_addr.s_addr) { inet_ntop(AF_INET, &a4->sin_addr, a_s, sizeof(a_s)); inet_ntop(AF_INET, &b4->sin_addr, b_s, sizeof(b_s)); snprintf(msg, sz, "addr diff: %s vs %s", a_s, b_s); return 0; } if (a4->sin_port != b4->sin_port) { snprintf(msg, sz, "port diff: %d vs %d", ntohs(a4->sin_port), ntohs(b4->sin_port)); //return 0; } const uint32_t *a32, *b32; a32 = (const uint32_t *)a4->sin_zero; b32 = (const uint32_t *)b4->sin_zero; if ((*a32 != *b32) || (*(a32 + 1) != *(b32 + 1))) { snprintf(msg, sz, "zero diff: 0x%08X%08X vs 0x%08X%08X", ntohl(*a32), ntohl(*(a32 + 1)), ntohl(*b32), ntohl(*(b32 + 1))); return 0; } return 1; case AF_INET6: a6 = (const struct sockaddr_in6 *)a; b6 = (const struct sockaddr_in6 *)b; if (!IN6_ARE_ADDR_EQUAL(&a6->sin6_addr, &b6->sin6_addr)) { inet_ntop(AF_INET6, &a6->sin6_addr, a_s, sizeof(a_s)); inet_ntop(AF_INET6, &b6->sin6_addr, a_s, sizeof(a_s)); snprintf(msg, sz, "addr diff: %s vs %s", a_s, b_s); return 0; } if (a6->sin6_scope_id != b6->sin6_scope_id) { snprintf(msg, sz, "scope diff: %u vs %u", a6->sin6_scope_id, b6->sin6_scope_id); return 0; } break; case AF_LINK: al = (const struct sockaddr_dl *)a; bl = (const struct sockaddr_dl *)b; if (al->sdl_index != bl->sdl_index) { snprintf(msg, sz, "sdl_index diff: %u vs %u", al->sdl_index, bl->sdl_index); return 0; } if ((al->sdl_alen != bl->sdl_alen) || (memcmp(LLADDR(al), LLADDR(bl), al->sdl_alen) != 0)) { char abuf[64], bbuf[64]; sa_print_hd(abuf, sizeof(abuf), LLADDR(al), al->sdl_alen); sa_print_hd(bbuf, sizeof(bbuf), LLADDR(bl), bl->sdl_alen); snprintf(msg, sz, "sdl_alen diff: {%s} (%d) vs {%s} (%d)", abuf, al->sdl_alen, bbuf, bl->sdl_alen); return 0; } if (((flags & SA_F_IGNORE_IFTYPE) == 0) && (al->sdl_type != bl->sdl_type)) { snprintf(msg, sz, "sdl_type diff: %u vs %u", al->sdl_type, bl->sdl_type); return 0; } if (((flags & SA_F_IGNORE_IFNAME) == 0) && ((al->sdl_nlen != bl->sdl_nlen) || (memcmp(al->sdl_data, bl->sdl_data, al->sdl_nlen) != 0))) { char abuf[64], bbuf[64]; memcpy(abuf, al->sdl_data, al->sdl_nlen); abuf[al->sdl_nlen] = '\0'; memcpy(bbuf, bl->sdl_data, bl->sdl_nlen); abuf[bl->sdl_nlen] = '\0'; snprintf(msg, sz, "sdl_nlen diff: {%s} (%d) vs {%s} (%d)", abuf, al->sdl_nlen, bbuf, bl->sdl_nlen); return 0; } if (flags & SA_F_IGNORE_MEMCMP) return 1; break; } if (memcmp(a, b, a->sa_len)) { int i; for (i = 0; i < a->sa_len; i++) if (((const char *)a)[i] != ((const char *)b)[i]) break; sa_print(a, 1); sa_print(b, 1); snprintf(msg, sz, "overall memcmp() reports diff for af %d offset %d", a->sa_family, i); return 0; } return 1; } int sa_equal_msg(const struct sockaddr *a, const struct sockaddr *b, char *msg, size_t sz) { return sa_equal_msg_flags(a, b, msg, sz, 0); } void sa_fill_mask4(struct sockaddr_in *sin, int plen) { memset(sin, 0, sizeof(struct sockaddr_in)); sin->sin_family = AF_INET; sin->sin_len = sizeof(struct sockaddr_in); sin->sin_addr.s_addr = htonl(plen ? ~((1 << (32 - plen)) - 1) : 0); } void sa_fill_mask6(struct sockaddr_in6 *sin6, uint8_t mask) { uint32_t *cp; memset(sin6, 0, sizeof(struct sockaddr_in6)); sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(struct sockaddr_in6); for (cp = (uint32_t *)&sin6->sin6_addr; mask >= 32; mask -= 32) *cp++ = 0xFFFFFFFF; if (mask > 0) *cp = htonl(mask ? ~((1 << (32 - mask)) - 1) : 0); } /* 52:54:00:14:e3:10 */ #define ETHER_MAC_MAX_LENGTH 17 int sa_convert_str_to_sa(const char *_addr, struct sockaddr *sa) { int error; int af = AF_UNSPEC; char *addr = strdup(_addr); int retcode = 0; /* classify AF by str */ if (strchr(addr, ':')) { /* inet6 or ether */ char *k; int delim_cnt = 0; for (k = addr; *k; k++) if (*k == ':') delim_cnt++; af = AF_INET6; if (delim_cnt == 5) { k = strchr(addr, '%'); if (k != NULL && (k - addr) <= ETHER_MAC_MAX_LENGTH) af = AF_LINK; } } else if (strchr(addr, '.')) af = AF_INET; /* */ char *delimiter; int ifindex = 0; char *ifname = NULL; if ((delimiter = strchr(addr, '%')) != NULL) { *delimiter = '\0'; ifname = delimiter + 1; ifindex = if_nametoindex(ifname); if (ifindex == 0) RLOG("unable to find ifindex for '%s'", ifname); else RLOG("if %s mapped to %d", ifname, ifindex); } if (af == AF_INET6) { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa; memset(sin6, 0, sizeof(struct sockaddr_in6)); sin6->sin6_family = AF_INET6; sin6->sin6_len = sizeof(struct sockaddr_in6); sin6->sin6_scope_id = ifindex; error = inet_pton(AF_INET6, addr, &sin6->sin6_addr); if (error != 1) RLOG_ERRNO("inet_ntop() failed: ret=%d", error); else retcode = 1; } else if (af == AF_INET) { struct sockaddr_in *sin = (struct sockaddr_in *)sa; memset(sin, 0, sizeof(struct sockaddr_in)); sin->sin_family = AF_INET; sin->sin_len = sizeof(struct sockaddr_in); error = inet_pton(AF_INET, addr, &sin->sin_addr); if (error != 1) RLOG("inet_ntop() failed: ret=%d", error); else retcode = 1; } else if (af == AF_LINK) { struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; memset(sdl, 0, sizeof(struct sockaddr_dl)); sdl->sdl_family = AF_LINK; sdl->sdl_len = sizeof(struct sockaddr_dl); sdl->sdl_index = ifindex; sdl->sdl_alen = 6; struct ether_addr *ea = (struct ether_addr *)LLADDR(sdl); if (ether_aton_r(addr, ea) == NULL) RLOG("ether_aton() failed"); else retcode = 1; } return (retcode); } int rtsock_setup_socket() { int fd; int af = AF_UNSPEC; /* 0 to capture messages from all AFs */ fd = socket(PF_ROUTE, SOCK_RAW, af); ATF_REQUIRE_MSG(fd != -1, "rtsock open failed: %s", strerror(errno)); /* Listen for our messages */ int on = 1; if (setsockopt(fd, SOL_SOCKET,SO_USELOOPBACK, &on, sizeof(on)) < 0) RLOG_ERRNO("setsockopt failed"); return (fd); } ssize_t rtsock_send_rtm(int fd, struct rt_msghdr *rtm) { int my_errno; ssize_t len; rtsock_update_rtm_len(rtm); len = write(fd, rtm, rtm->rtm_msglen); my_errno = errno; RTSOCK_ATF_REQUIRE_MSG(rtm, len == rtm->rtm_msglen, "rtsock write failed: want %d got %zd (%s)", rtm->rtm_msglen, len, strerror(my_errno)); return (len); } struct rt_msghdr * rtsock_read_rtm(int fd, char *buffer, size_t buflen) { ssize_t len; struct pollfd pfd; int poll_delay = 5 * 1000; /* 5 seconds */ /* Check for the data available to read first */ memset(&pfd, 0, sizeof(pfd)); pfd.fd = fd; pfd.events = POLLIN; if (poll(&pfd, 1, poll_delay) == 0) ATF_REQUIRE_MSG(1 == 0, "rtsock read timed out (%d seconds passed)", poll_delay / 1000); len = read(fd, buffer, buflen); int my_errno = errno; ATF_REQUIRE_MSG(len > 0, "rtsock read failed: %s", strerror(my_errno)); rtsock_validate_message(buffer, len); return ((struct rt_msghdr *)buffer); } struct rt_msghdr * rtsock_read_rtm_reply(int fd, char *buffer, size_t buflen, int seq) { struct rt_msghdr *rtm; int found = 0; while (true) { rtm = rtsock_read_rtm(fd, buffer, buflen); if (rtm->rtm_pid == getpid() && rtm->rtm_seq == seq) found = 1; if (found) RLOG("--- MATCHED RTSOCK MESSAGE ---"); else RLOG("--- SKIPPED RTSOCK MESSAGE ---"); rtsock_print_rtm(rtm); if (found) return (rtm); } /* NOTREACHED */ } void rtsock_prepare_route_message_base(struct rt_msghdr *rtm, int cmd) { memset(rtm, 0, sizeof(struct rt_msghdr)); rtm->rtm_type = cmd; rtm->rtm_version = RTM_VERSION; rtm->rtm_seq = _rtm_seq++; } void rtsock_prepare_route_message(struct rt_msghdr *rtm, int cmd, struct sockaddr *dst, struct sockaddr *mask, struct sockaddr *gw) { rtsock_prepare_route_message_base(rtm, cmd); if (dst != NULL) rtsock_add_rtm_sa(rtm, RTA_DST, dst); if (gw != NULL) { rtsock_add_rtm_sa(rtm, RTA_GATEWAY, gw); rtm->rtm_flags |= RTF_GATEWAY; } if (mask != NULL) rtsock_add_rtm_sa(rtm, RTA_NETMASK, mask); } void rtsock_add_rtm_sa(struct rt_msghdr *rtm, int addr_type, struct sockaddr *sa) { char *ptr = (char *)(rtm + 1); for (int i = 0; i < RTAX_MAX; i++) { if (rtm->rtm_addrs & (1 << i)) { /* add */ ptr += ALIGN(((struct sockaddr *)ptr)->sa_len); } } rtm->rtm_addrs |= addr_type; memcpy(ptr, sa, sa->sa_len); } struct sockaddr * rtsock_find_rtm_sa(struct rt_msghdr *rtm, int addr_type) { char *ptr = (char *)(rtm + 1); for (int i = 0; i < RTAX_MAX; i++) { if (rtm->rtm_addrs & (1 << i)) { if (addr_type == (1 << i)) return ((struct sockaddr *)ptr); /* add */ ptr += ALIGN(((struct sockaddr *)ptr)->sa_len); } } return (NULL); } size_t rtsock_calc_rtm_len(struct rt_msghdr *rtm) { size_t len = sizeof(struct rt_msghdr); char *ptr = (char *)(rtm + 1); for (int i = 0; i < RTAX_MAX; i++) { if (rtm->rtm_addrs & (1 << i)) { /* add */ int sa_len = ALIGN(((struct sockaddr *)ptr)->sa_len); len += sa_len; ptr += sa_len; } } return len; } void rtsock_update_rtm_len(struct rt_msghdr *rtm) { rtm->rtm_msglen = rtsock_calc_rtm_len(rtm); } static void _validate_message_sockaddrs(char *buffer, int rtm_len, size_t offset, int rtm_addrs) { struct sockaddr *sa; size_t parsed_len = offset; /* Offset denotes initial header size */ sa = (struct sockaddr *)(buffer + offset); for (int i = 0; i < RTAX_MAX; i++) { if ((rtm_addrs & (1 << i)) == 0) continue; parsed_len += SA_SIZE(sa); RTSOCK_ATF_REQUIRE_MSG((struct rt_msghdr *)buffer, parsed_len <= rtm_len, "SA %d: len %d exceeds msg size %d", i, (int)sa->sa_len, rtm_len); if (sa->sa_family == AF_LINK) { struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; int data_len = sdl->sdl_nlen + sdl->sdl_alen; data_len += offsetof(struct sockaddr_dl, sdl_data); RTSOCK_ATF_REQUIRE_MSG((struct rt_msghdr *)buffer, data_len <= rtm_len, "AF_LINK data size exceeds total len: %u vs %u, nlen=%d alen=%d", data_len, rtm_len, sdl->sdl_nlen, sdl->sdl_alen); } sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa)); } RTSOCK_ATF_REQUIRE_MSG((struct rt_msghdr *)buffer, parsed_len == rtm_len, "message len != parsed len: expected %d parsed %d", rtm_len, (int)parsed_len); } /* * Raises error if base syntax checks fails. */ void rtsock_validate_message(char *buffer, ssize_t len) { struct rt_msghdr *rtm; ATF_REQUIRE_MSG(len > 0, "read() return %zd, error: %s", len, strerror(errno)); rtm = (struct rt_msghdr *)buffer; ATF_REQUIRE_MSG(rtm->rtm_version == RTM_VERSION, "unknown RTM_VERSION: expected %d got %d", RTM_VERSION, rtm->rtm_version); ATF_REQUIRE_MSG(rtm->rtm_msglen <= len, "wrong message length: expected %d got %d", (int)len, (int)rtm->rtm_msglen); switch (rtm->rtm_type) { case RTM_GET: case RTM_ADD: case RTM_DELETE: case RTM_CHANGE: _validate_message_sockaddrs(buffer, rtm->rtm_msglen, sizeof(struct rt_msghdr), rtm->rtm_addrs); break; case RTM_DELADDR: case RTM_NEWADDR: _validate_message_sockaddrs(buffer, rtm->rtm_msglen, sizeof(struct ifa_msghdr), ((struct ifa_msghdr *)buffer)->ifam_addrs); break; } } void rtsock_validate_pid_ours(struct rt_msghdr *rtm) { RTSOCK_ATF_REQUIRE_MSG(rtm, rtm->rtm_pid == getpid(), "expected pid %d, got %d", getpid(), rtm->rtm_pid); } void rtsock_validate_pid_user(struct rt_msghdr *rtm) { RTSOCK_ATF_REQUIRE_MSG(rtm, rtm->rtm_pid > 0, "expected non-zero pid, got %d", rtm->rtm_pid); } void rtsock_validate_pid_kernel(struct rt_msghdr *rtm) { RTSOCK_ATF_REQUIRE_MSG(rtm, rtm->rtm_pid == 0, "expected zero pid, got %d", rtm->rtm_pid); } #endif diff --git a/usr.bin/chpass/Makefile b/usr.bin/chpass/Makefile index fb70df886ee2..bd5baa3c4d07 100644 --- a/usr.bin/chpass/Makefile +++ b/usr.bin/chpass/Makefile @@ -1,45 +1,45 @@ # @(#)Makefile 8.2 (Berkeley) 4/2/94 # $FreeBSD$ .include -.PATH: ${SRCTOP}/usr.sbin/pwd_mkdb ${SRCTOP}/lib/libc/gen +.PATH: ${SRCTOP}/lib/libc/gen PROG= chpass SRCS= chpass.c edit.c field.c pw_scan.c table.c util.c BINOWN= root BINMODE=4555 PRECIOUSPROG= .if ${MK_NIS} != "no" CFLAGS+= -DYP .endif #Some people need this, uncomment to activate #CFLAGS+=-DRESTRICT_FULLNAME_CHANGE -CFLAGS+=-I${SRCTOP}/usr.sbin/pwd_mkdb -I${SRCTOP}/lib/libc/gen -I. +CFLAGS+=-I${SRCTOP}/lib/libc/gen -I. LIBADD= crypt util .if ${MK_NIS} != "no" LIBADD+= ypclnt .endif SYMLINKS= chpass ${BINDIR}/chfn SYMLINKS+= chpass ${BINDIR}/chsh .if ${MK_NIS} != "no" SYMLINKS+= chpass ${BINDIR}/ypchfn SYMLINKS+= chpass ${BINDIR}/ypchpass SYMLINKS+= chpass ${BINDIR}/ypchsh .endif MLINKS= chpass.1 chfn.1 chpass.1 chsh.1 .if ${MK_NIS} != "no" MLINKS+= chpass.1 ypchpass.1 chpass.1 ypchfn.1 chpass.1 ypchsh.1 .endif beforeinstall: .for i in chpass chfn chsh ypchpass ypchfn ypchsh .if exists(${DESTDIR}${BINDIR}/$i) -chflags noschg ${DESTDIR}${BINDIR}/$i .endif .endfor .include diff --git a/usr.sbin/pwd_mkdb/Makefile b/usr.sbin/pwd_mkdb/Makefile index 4fea2f33796d..f8a2b20ef10b 100644 --- a/usr.sbin/pwd_mkdb/Makefile +++ b/usr.sbin/pwd_mkdb/Makefile @@ -1,16 +1,16 @@ # @(#)Makefile 8.1 (Berkeley) 6/6/93 # $FreeBSD$ .PATH: ${SRCTOP}/lib/libc/gen # for pw_scan.c PACKAGE= runtime PROG= pwd_mkdb MAN= pwd_mkdb.8 SRCS= pw_scan.c pwd_mkdb.c CFLAGS+= -I${SRCTOP}/lib/libc/gen # for pw_scan.h .if defined(BOOTSTRAPPING) -CFLAGS+=-I${.CURDIR} +CFLAGS+=-I${.CURDIR}/bootstrap .endif .include diff --git a/usr.sbin/pwd_mkdb/pwd.h b/usr.sbin/pwd_mkdb/bootstrap/pwd.h similarity index 100% rename from usr.sbin/pwd_mkdb/pwd.h rename to usr.sbin/pwd_mkdb/bootstrap/pwd.h