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Index: head/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h
===================================================================
--- head/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h
+++ head/cddl/contrib/opensolaris/lib/libzfs/common/libzfs.h
@@ -213,6 +213,7 @@
extern const char *zpool_state_to_name(vdev_state_t, vdev_aux_t);
extern const char *zpool_pool_state_to_name(pool_state_t);
extern void zpool_free_handles(libzfs_handle_t *);
+extern int zpool_nextboot(libzfs_handle_t *, uint64_t, uint64_t, const char *);
/*
* Iterate over all active pools in the system.
Index: head/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c
===================================================================
--- head/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c
+++ head/cddl/contrib/opensolaris/lib/libzfs/common/libzfs_pool.c
@@ -4126,3 +4126,25 @@
libzfs_fini(hdl);
return (ret);
}
+
+int
+zpool_nextboot(libzfs_handle_t *hdl, uint64_t pool_guid, uint64_t dev_guid,
+ const char *command)
+{
+ zfs_cmd_t zc = { 0 };
+ nvlist_t *args;
+ char *packed;
+ size_t size;
+ int error;
+
+ args = fnvlist_alloc();
+ fnvlist_add_uint64(args, ZPOOL_CONFIG_POOL_GUID, pool_guid);
+ fnvlist_add_uint64(args, ZPOOL_CONFIG_GUID, dev_guid);
+ fnvlist_add_string(args, "command", command);
+ error = zcmd_write_src_nvlist(hdl, &zc, args);
+ if (error == 0)
+ error = ioctl(hdl->libzfs_fd, ZFS_IOC_NEXTBOOT, &zc);
+ zcmd_free_nvlists(&zc);
+ nvlist_free(args);
+ return (error);
+}
Index: head/sbin/Makefile
===================================================================
--- head/sbin/Makefile
+++ head/sbin/Makefile
@@ -87,6 +87,7 @@
SUBDIR.${MK_PF}+= pflogd
SUBDIR.${MK_QUOTAS}+= quotacheck
SUBDIR.${MK_ROUTED}+= routed
+SUBDIR.${MK_ZFS}+= zfsbootcfg
SUBDIR.${MK_TESTS}+= tests
Index: head/sbin/zfsbootcfg/Makefile
===================================================================
--- head/sbin/zfsbootcfg/Makefile
+++ head/sbin/zfsbootcfg/Makefile
@@ -0,0 +1,27 @@
+# @(#)Makefile 8.4 (Berkeley) 6/22/95
+# $FreeBSD$
+
+PROG= zfsbootcfg
+WARNS?= 1
+MAN= zfsbootcfg.8
+
+LIBADD+=zfs
+LIBADD+=nvpair
+LIBADD+=umem
+LIBADD+=uutil
+LIBADD+=geom
+
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/include
+CFLAGS+= -I${SRCTOP}/cddl/compat/opensolaris/lib/libumem
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzfs_core/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libzpool/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/lib/libnvpair
+CFLAGS+= -I${SRCTOP}/sys/cddl/compat/opensolaris
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
+CFLAGS+= -I${SRCTOP}/sys/cddl/contrib/opensolaris/uts/common
+CFLAGS+= -I${SRCTOP}/cddl/contrib/opensolaris/head
+
+CFLAGS+= -DNEED_SOLARIS_BOOLEAN
+
+.include <bsd.prog.mk>
Index: head/sbin/zfsbootcfg/zfsbootcfg.8
===================================================================
--- head/sbin/zfsbootcfg/zfsbootcfg.8
+++ head/sbin/zfsbootcfg/zfsbootcfg.8
@@ -0,0 +1,112 @@
+.\" Copyright (c) 2016 Andriy Gapon
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd October 12, 2016
+.Dt ZFSBOOTCFG 8
+.Os
+.Sh NAME
+.Nm zfsbootcfg
+.Nd "specify zfsboot options for the next boot"
+.Sh SYNOPSIS
+.Nm
+.Ao Ar options Ac
+.Sh DESCRIPTION
+.Nm
+is used to set
+.Xr boot.config 5 Ns -style
+options to be used by
+.Xr zfsboot 8
+or
+.Xr gptzfsboot 8
+the next time the machine is booted.
+Once
+.Xr zfsboot 8
+or
+.Xr gptzfsboot 8
+reads the information, it is deleted.
+If booting fails, the machine automatically reverts to the previous
+boot configuration.
+The information is stored in a special reserved area of a ZFS pool.
+.Xr zfsboot 8
+or
+.Xr gptzfsboot 8
+read the boot option information from the first disk found in the first
+ZFS pool found.
+.Sh ENVIRONMENT
+.Bl -tag -width vfs.zfs.boot.primary_pool -compact
+.It Ev vfs.zfs.boot.primary_pool
+The
+.Xr kenv 1
+variable that identifies a pool for which the options are written.
+.It Ev vfs.zfs.boot.primary_vdev
+The
+.Xr kenv 1
+variable that identifies a disk within the pool where the options
+are written.
+.El
+.Sh EXAMPLES
+Try to boot to a new
+.Em boot environment
+without changing the
+.Cm bootfs
+property of a pool:
+.Pp
+.Dl "zfsbootcfg ""zfs:tank/ROOT/newbe:""
+.Pp
+To clear the boot options:
+.Pp
+.Dl "zfsbootcfg """"
+.Sh SEE ALSO
+.Xr boot.config 5 ,
+.Xr gptzfsboot 8 ,
+.Xr zfsboot 8
+.Sh HISTORY
+.Nm
+appeared in
+.Fx 12.0 .
+.Sh AUTHORS
+This manual page was written by
+.An Andriy Gapon Aq Mt avg@FreeBSD.org .
+.Sh CAVEATS
+At the moment,
+.Nm
+uses the
+.Ev vfs.zfs.boot.primary_pool
+and
+.Ev vfs.zfs.boot.primary_vdev
+.Xr kenv 1
+variables to determine a ZFS pool and a disk in it where the options
+are to be stored.
+The variables are set by the ZFS boot chain, so there is an assumption
+that the same boot disk is going to be used for the next reboot.
+There is no
+.Nm
+option to specify a different pool or a different disk.
+.Pp
+.Nm
+should be extended to install new
+.Xr zfsboot 8
+blocks in a ZFS pool.
Index: head/sbin/zfsbootcfg/zfsbootcfg.c
===================================================================
--- head/sbin/zfsbootcfg/zfsbootcfg.c
+++ head/sbin/zfsbootcfg/zfsbootcfg.c
@@ -0,0 +1,98 @@
+/*-
+ * Copyright (c) 2016 Andriy Gapon <avg@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <errno.h>
+#include <limits.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <kenv.h>
+
+#include <libzfs.h>
+
+/* Keep in sync with zfsboot.c. */
+#define MAX_COMMAND_LEN 512
+
+int main(int argc, const char * const *argv)
+{
+ char buf[32];
+ libzfs_handle_t *hdl;
+ uint64_t pool_guid;
+ uint64_t vdev_guid;
+ int zfs_fd;
+ int len;
+
+ if (argc != 2) {
+ fprintf(stderr, "usage: zfsbootcfg <boot.config(5) options>\n");
+ return (1);
+ }
+
+ len = strlen(argv[1]);
+ if (len >= MAX_COMMAND_LEN) {
+ fprintf(stderr, "options string is too long\n");
+ return (1);
+ }
+
+ if (kenv(KENV_GET, "vfs.zfs.boot.primary_pool", buf, sizeof(buf)) <= 0) {
+ perror("can't get vfs.zfs.boot.primary_pool");
+ return (1);
+ }
+ pool_guid = strtoumax(buf, NULL, 10);
+ if (pool_guid == 0) {
+ perror("can't parse vfs.zfs.boot.primary_pool");
+ return (1);
+ }
+
+ if (kenv(KENV_GET, "vfs.zfs.boot.primary_vdev", buf, sizeof(buf)) <= 0) {
+ perror("can't get vfs.zfs.boot.primary_vdev");
+ return (1);
+ }
+ vdev_guid = strtoumax(buf, NULL, 10);
+ if (vdev_guid == 0) {
+ perror("can't parse vfs.zfs.boot.primary_vdev");
+ return (1);
+ }
+
+ if ((hdl = libzfs_init()) == NULL) {
+ (void) fprintf(stderr, "internal error: failed to "
+ "initialize ZFS library\n");
+ return (1);
+ }
+
+ if (zpool_nextboot(hdl, pool_guid, vdev_guid, argv[1]) != 0) {
+ perror("ZFS_IOC_NEXTBOOT failed");
+ libzfs_fini(hdl);
+ return (1);
+ }
+
+ libzfs_fini(hdl);
+ printf("zfs next boot options are successfully written\n");
+ return (0);
+}
Index: head/sys/boot/i386/common/drv.h
===================================================================
--- head/sys/boot/i386/common/drv.h
+++ head/sys/boot/i386/common/drv.h
@@ -40,9 +40,9 @@
};
int drvread(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk);
-#ifdef GPT
+#if defined(GPT) || defined(ZFS)
int drvwrite(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk);
-#endif /* GPT */
+#endif /* GPT || ZFS */
uint64_t drvsize(struct dsk *dskp);
#endif /* !_DRV_H_ */
Index: head/sys/boot/i386/common/drv.c
===================================================================
--- head/sys/boot/i386/common/drv.c
+++ head/sys/boot/i386/common/drv.c
@@ -91,7 +91,7 @@
return (0);
}
-#ifdef GPT
+#if defined(GPT) || defined(ZFS)
int
drvwrite(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk)
{
@@ -114,4 +114,4 @@
}
return (0);
}
-#endif /* GPT */
+#endif /* GPT || ZFS */
Index: head/sys/boot/i386/gptzfsboot/Makefile
===================================================================
--- head/sys/boot/i386/gptzfsboot/Makefile
+++ head/sys/boot/i386/gptzfsboot/Makefile
@@ -19,7 +19,7 @@
CFLAGS= -DBOOTPROG=\"gptzfsboot\" \
-O1 \
- -DGPT -DBOOT2 \
+ -DGPT -DZFS -DBOOT2 \
-DSIOPRT=${BOOT_COMCONSOLE_PORT} \
-DSIOFMT=${B2SIOFMT} \
-DSIOSPD=${BOOT_COMCONSOLE_SPEED} \
Index: head/sys/boot/i386/zfsboot/Makefile
===================================================================
--- head/sys/boot/i386/zfsboot/Makefile
+++ head/sys/boot/i386/zfsboot/Makefile
@@ -18,7 +18,7 @@
CFLAGS= -DBOOTPROG=\"zfsboot\" \
-O1 \
- -DBOOT2 \
+ -DZFS -DBOOT2 \
-DSIOPRT=${BOOT_COMCONSOLE_PORT} \
-DSIOFMT=${B2SIOFMT} \
-DSIOSPD=${BOOT_COMCONSOLE_SPEED} \
Index: head/sys/boot/i386/zfsboot/zfsboot.c
===================================================================
--- head/sys/boot/i386/zfsboot/zfsboot.c
+++ head/sys/boot/i386/zfsboot/zfsboot.c
@@ -119,6 +119,7 @@
static struct dmadat *dmadat;
void exit(int);
+void reboot(void);
static void load(void);
static int parse(void);
static void bios_getmem(void);
@@ -175,7 +176,7 @@
n = size;
if (*offp + n > zp->zp_size)
n = zp->zp_size - *offp;
-
+
rc = dnode_read(spa, dnode, *offp, start, n);
if (rc)
return (-1);
@@ -260,6 +261,35 @@
}
static int
+vdev_write(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes)
+{
+ char *p;
+ daddr_t lba;
+ unsigned int nb;
+ struct dsk *dsk = (struct dsk *) priv;
+
+ if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1)))
+ return -1;
+
+ p = buf;
+ lba = off / DEV_BSIZE;
+ lba += dsk->start;
+ while (bytes > 0) {
+ nb = bytes / DEV_BSIZE;
+ if (nb > READ_BUF_SIZE / DEV_BSIZE)
+ nb = READ_BUF_SIZE / DEV_BSIZE;
+ memcpy(dmadat->rdbuf, p, nb * DEV_BSIZE);
+ if (drvwrite(dsk, dmadat->rdbuf, lba, nb))
+ return -1;
+ p += nb * DEV_BSIZE;
+ lba += nb;
+ bytes -= nb * DEV_BSIZE;
+ }
+
+ return 0;
+}
+
+static int
xfsread(const dnode_phys_t *dnode, off_t *offp, void *buf, size_t nbyte)
{
if ((size_t)zfs_read(spa, dnode, offp, buf, nbyte) != nbyte) {
@@ -269,6 +299,52 @@
return 0;
}
+/*
+ * Read Pad2 (formerly "Boot Block Header") area of the first
+ * vdev label of the given vdev.
+ */
+static int
+vdev_read_pad2(vdev_t *vdev, char *buf, size_t size)
+{
+ blkptr_t bp;
+ char *tmp = zap_scratch;
+ off_t off = offsetof(vdev_label_t, vl_pad2);
+
+ if (size > VDEV_PAD_SIZE)
+ size = VDEV_PAD_SIZE;
+
+ BP_ZERO(&bp);
+ BP_SET_LSIZE(&bp, VDEV_PAD_SIZE);
+ BP_SET_PSIZE(&bp, VDEV_PAD_SIZE);
+ BP_SET_CHECKSUM(&bp, ZIO_CHECKSUM_LABEL);
+ BP_SET_COMPRESS(&bp, ZIO_COMPRESS_OFF);
+ DVA_SET_OFFSET(BP_IDENTITY(&bp), off);
+ if (vdev_read_phys(vdev, &bp, tmp, off, 0))
+ return (EIO);
+ memcpy(buf, tmp, size);
+ return (0);
+}
+
+static int
+vdev_clear_pad2(vdev_t *vdev)
+{
+ char *zeroes = zap_scratch;
+ uint64_t *end;
+ off_t off = offsetof(vdev_label_t, vl_pad2);
+
+ memset(zeroes, 0, VDEV_PAD_SIZE);
+ end = (uint64_t *)(zeroes + VDEV_PAD_SIZE);
+ /* ZIO_CHECKSUM_LABEL magic and pre-calcualted checksum for all zeros */
+ end[-5] = 0x0210da7ab10c7a11;
+ end[-4] = 0x97f48f807f6e2a3f;
+ end[-3] = 0xaf909f1658aacefc;
+ end[-2] = 0xcbd1ea57ff6db48b;
+ end[-1] = 0x6ec692db0d465fab;
+ if (vdev_write(vdev, vdev->v_read_priv, off, zeroes, VDEV_PAD_SIZE))
+ return (EIO);
+ return (0);
+}
+
static void
bios_getmem(void)
{
@@ -542,10 +618,12 @@
int
main(void)
{
- int autoboot, i;
dnode_phys_t dn;
off_t off;
struct dsk *dsk;
+ int autoboot, i;
+ int nextboot;
+ int rc;
dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
@@ -634,7 +712,39 @@
primary_spa = spa;
primary_vdev = spa_get_primary_vdev(spa);
- if (zfs_spa_init(spa) != 0 || zfs_mount(spa, 0, &zfsmount) != 0) {
+ nextboot = 0;
+ rc = vdev_read_pad2(primary_vdev, cmd, sizeof(cmd));
+ if (vdev_clear_pad2(primary_vdev))
+ printf("failed to clear pad2 area of primary vdev\n");
+ if (rc == 0) {
+ if (*cmd) {
+ /*
+ * We could find an old-style ZFS Boot Block header here.
+ * Simply ignore it.
+ */
+ if (*(uint64_t *)cmd != 0x2f5b007b10c) {
+ /*
+ * Note that parse() is destructive to cmd[] and we also want
+ * to honor RBX_QUIET option that could be present in cmd[].
+ */
+ nextboot = 1;
+ memcpy(cmddup, cmd, sizeof(cmd));
+ if (parse()) {
+ printf("failed to parse pad2 area of primary vdev\n");
+ reboot();
+ }
+ if (!OPT_CHECK(RBX_QUIET))
+ printf("zfs nextboot: %s\n", cmddup);
+ }
+ /* Do not process this command twice */
+ *cmd = 0;
+ }
+ } else
+ printf("failed to read pad2 area of primary vdev\n");
+
+ /* Mount ZFS only if it's not already mounted via nextboot parsing. */
+ if (zfsmount.spa == NULL &&
+ (zfs_spa_init(spa) != 0 || zfs_mount(spa, 0, &zfsmount) != 0)) {
printf("%s: failed to mount default pool %s\n",
BOOTPROG, spa->spa_name);
autoboot = 0;
@@ -658,6 +768,10 @@
*cmd = 0;
}
+ /* Do not risk waiting at the prompt forever. */
+ if (nextboot && !autoboot)
+ reboot();
+
/*
* Try to exec /boot/loader. If interrupted by a keypress,
* or in case of failure, try to load a kernel directly instead.
@@ -707,6 +821,13 @@
void
exit(int x)
{
+ __exit(x);
+}
+
+void
+reboot(void)
+{
+ __exit(0);
}
static void
Index: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/vdev.h
===================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/vdev.h
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/vdev.h
@@ -167,6 +167,8 @@
extern int vdev_label_init(vdev_t *vd, uint64_t txg, vdev_labeltype_t reason);
+extern int vdev_label_write_pad2(vdev_t *vd, const char *buf, size_t size);
+
#ifdef __cplusplus
}
#endif
Index: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_label.c
===================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_label.c
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_label.c
@@ -871,6 +871,44 @@
return (error);
}
+int
+vdev_label_write_pad2(vdev_t *vd, const char *buf, size_t size)
+{
+ spa_t *spa = vd->vdev_spa;
+ zio_t *zio;
+ char *pad2;
+ int flags = ZIO_FLAG_CONFIG_WRITER | ZIO_FLAG_CANFAIL;
+ int error;
+
+ if (size > VDEV_PAD_SIZE)
+ return (EINVAL);
+
+ if (!vd->vdev_ops->vdev_op_leaf)
+ return (ENODEV);
+ if (vdev_is_dead(vd))
+ return (ENXIO);
+
+ ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
+
+ pad2 = zio_buf_alloc(VDEV_PAD_SIZE);
+ bzero(pad2, VDEV_PAD_SIZE);
+ memcpy(pad2, buf, size);
+
+retry:
+ zio = zio_root(spa, NULL, NULL, flags);
+ vdev_label_write(zio, vd, 0, pad2,
+ offsetof(vdev_label_t, vl_pad2),
+ VDEV_PAD_SIZE, NULL, NULL, flags);
+ error = zio_wait(zio);
+ if (error != 0 && !(flags & ZIO_FLAG_TRYHARD)) {
+ flags |= ZIO_FLAG_TRYHARD;
+ goto retry;
+ }
+
+ zio_buf_free(pad2, VDEV_PAD_SIZE);
+ return (error);
+}
+
/*
* ==========================================================================
* uberblock load/sync
Index: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
===================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_ioctl.c
@@ -3472,6 +3472,53 @@
return (error);
}
+#ifdef __FreeBSD__
+static int
+zfs_ioc_nextboot(const char *unused, nvlist_t *innvl, nvlist_t *outnvl)
+{
+ char name[MAXNAMELEN];
+ spa_t *spa;
+ vdev_t *vd;
+ char *command;
+ uint64_t pool_guid;
+ uint64_t vdev_guid;
+ int error;
+
+ if (nvlist_lookup_uint64(innvl,
+ ZPOOL_CONFIG_POOL_GUID, &pool_guid) != 0)
+ return (EINVAL);
+ if (nvlist_lookup_uint64(innvl,
+ ZPOOL_CONFIG_GUID, &vdev_guid) != 0)
+ return (EINVAL);
+ if (nvlist_lookup_string(innvl,
+ "command", &command) != 0)
+ return (EINVAL);
+
+ mutex_enter(&spa_namespace_lock);
+ spa = spa_by_guid(pool_guid, vdev_guid);
+ if (spa != NULL)
+ strcpy(name, spa_name(spa));
+ mutex_exit(&spa_namespace_lock);
+ if (spa == NULL)
+ return (ENOENT);
+
+ if ((error = spa_open(name, &spa, FTAG)) != 0)
+ return (error);
+ spa_vdev_state_enter(spa, SCL_ALL);
+ vd = spa_lookup_by_guid(spa, vdev_guid, B_TRUE);
+ if (vd == NULL) {
+ (void) spa_vdev_state_exit(spa, NULL, ENXIO);
+ spa_close(spa, FTAG);
+ return (ENODEV);
+ }
+ error = vdev_label_write_pad2(vd, command, strlen(command));
+ (void) spa_vdev_state_exit(spa, NULL, 0);
+ txg_wait_synced(spa->spa_dsl_pool, 0);
+ spa_close(spa, FTAG);
+ return (error);
+}
+#endif
+
/*
* The dp_config_rwlock must not be held when calling this, because the
* unmount may need to write out data.
@@ -6024,6 +6071,9 @@
zfs_secpolicy_config, POOL_CHECK_NONE);
zfs_ioctl_register_dataset_nolog(ZFS_IOC_UNJAIL, zfs_ioc_unjail,
zfs_secpolicy_config, POOL_CHECK_NONE);
+ zfs_ioctl_register("fbsd_nextboot", ZFS_IOC_NEXTBOOT,
+ zfs_ioc_nextboot, zfs_secpolicy_config, NO_NAME,
+ POOL_CHECK_NONE, B_FALSE, B_FALSE);
#endif
}
Index: head/sys/cddl/contrib/opensolaris/uts/common/sys/fs/zfs.h
===================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/sys/fs/zfs.h
+++ head/sys/cddl/contrib/opensolaris/uts/common/sys/fs/zfs.h
@@ -891,6 +891,7 @@
ZFS_IOC_BOOKMARK,
ZFS_IOC_GET_BOOKMARKS,
ZFS_IOC_DESTROY_BOOKMARKS,
+ ZFS_IOC_NEXTBOOT,
ZFS_IOC_LAST
} zfs_ioc_t;

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