4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
27 * This file contains all the routines used when modifying on-disk SPA state.
28 * This includes opening, importing, destroying, exporting a pool, and syncing a
32 #include <sys/zfs_context.h>
33 #include <sys/fm/fs/zfs.h>
34 #include <sys/spa_impl.h>
36 #include <sys/zio_checksum.h>
38 #include <sys/dmu_tx.h>
42 #include <sys/vdev_impl.h>
43 #include <sys/metaslab.h>
44 #include <sys/metaslab_impl.h>
45 #include <sys/uberblock_impl.h>
48 #include <sys/dmu_traverse.h>
49 #include <sys/dmu_objset.h>
50 #include <sys/unique.h>
51 #include <sys/dsl_pool.h>
52 #include <sys/dsl_dataset.h>
53 #include <sys/dsl_dir.h>
54 #include <sys/dsl_prop.h>
55 #include <sys/dsl_synctask.h>
56 #include <sys/fs/zfs.h>
58 #include <sys/callb.h>
59 #include <sys/systeminfo.h>
60 #include <sys/spa_boot.h>
61 #include <sys/zfs_ioctl.h>
62 #include <sys/dsl_scan.h>
65 #include <sys/bootprops.h>
66 #include <sys/callb.h>
67 #include <sys/cpupart.h>
69 #include <sys/sysdc.h>
74 #include "zfs_comutil.h"
76 typedef enum zti_modes {
77 zti_mode_fixed, /* value is # of threads (min 1) */
78 zti_mode_online_percent, /* value is % of online CPUs */
79 zti_mode_batch, /* cpu-intensive; value is ignored */
80 zti_mode_null, /* don't create a taskq */
84 #define ZTI_FIX(n) { zti_mode_fixed, (n) }
85 #define ZTI_PCT(n) { zti_mode_online_percent, (n) }
86 #define ZTI_BATCH { zti_mode_batch, 0 }
87 #define ZTI_NULL { zti_mode_null, 0 }
89 #define ZTI_ONE ZTI_FIX(1)
91 typedef struct zio_taskq_info {
92 enum zti_modes zti_mode;
96 static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = {
97 "issue", "issue_high", "intr", "intr_high"
101 * Define the taskq threads for the following I/O types:
102 * NULL, READ, WRITE, FREE, CLAIM, and IOCTL
104 const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = {
105 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */
106 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL },
107 { ZTI_FIX(8), ZTI_NULL, ZTI_BATCH, ZTI_NULL },
108 { ZTI_BATCH, ZTI_FIX(5), ZTI_FIX(8), ZTI_FIX(5) },
109 { ZTI_FIX(100), ZTI_NULL, ZTI_ONE, ZTI_NULL },
110 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL },
111 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL },
114 static dsl_syncfunc_t spa_sync_props;
115 static boolean_t spa_has_active_shared_spare(spa_t *spa);
116 static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config,
117 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig,
119 static void spa_vdev_resilver_done(spa_t *spa);
121 uint_t zio_taskq_batch_pct = 100; /* 1 thread per cpu in pset */
122 id_t zio_taskq_psrset_bind = PS_NONE;
123 boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */
124 uint_t zio_taskq_basedc = 80; /* base duty cycle */
126 boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */
129 * This (illegal) pool name is used when temporarily importing a spa_t in order
130 * to get the vdev stats associated with the imported devices.
132 #define TRYIMPORT_NAME "$import"
135 * ==========================================================================
136 * SPA properties routines
137 * ==========================================================================
141 * Add a (source=src, propname=propval) list to an nvlist.
144 spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval,
145 uint64_t intval, zprop_source_t src)
147 const char *propname = zpool_prop_to_name(prop);
150 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
151 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0);
154 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0);
156 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0);
158 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0);
159 nvlist_free(propval);
163 * Get property values from the spa configuration.
166 spa_prop_get_config(spa_t *spa, nvlist_t **nvp)
170 uint64_t cap, version;
171 zprop_source_t src = ZPROP_SRC_NONE;
172 spa_config_dirent_t *dp;
174 ASSERT(MUTEX_HELD(&spa->spa_props_lock));
176 if (spa->spa_root_vdev != NULL) {
177 alloc = metaslab_class_get_alloc(spa_normal_class(spa));
178 size = metaslab_class_get_space(spa_normal_class(spa));
179 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src);
180 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src);
181 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src);
182 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL,
184 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL,
185 (spa_mode(spa) == FREAD), src);
187 cap = (size == 0) ? 0 : (alloc * 100 / size);
188 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src);
190 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL,
191 ddt_get_pool_dedup_ratio(spa), src);
193 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL,
194 spa->spa_root_vdev->vdev_state, src);
196 version = spa_version(spa);
197 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION))
198 src = ZPROP_SRC_DEFAULT;
200 src = ZPROP_SRC_LOCAL;
201 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src);
204 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src);
206 if (spa->spa_root != NULL)
207 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root,
210 if ((dp = list_head(&spa->spa_config_list)) != NULL) {
211 if (dp->scd_path == NULL) {
212 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
213 "none", 0, ZPROP_SRC_LOCAL);
214 } else if (strcmp(dp->scd_path, spa_config_path) != 0) {
215 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
216 dp->scd_path, 0, ZPROP_SRC_LOCAL);
222 * Get zpool property values.
225 spa_prop_get(spa_t *spa, nvlist_t **nvp)
227 objset_t *mos = spa->spa_meta_objset;
232 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
234 mutex_enter(&spa->spa_props_lock);
237 * Get properties from the spa config.
239 spa_prop_get_config(spa, nvp);
241 /* If no pool property object, no more prop to get. */
242 if (mos == NULL || spa->spa_pool_props_object == 0) {
243 mutex_exit(&spa->spa_props_lock);
248 * Get properties from the MOS pool property object.
250 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object);
251 (err = zap_cursor_retrieve(&zc, &za)) == 0;
252 zap_cursor_advance(&zc)) {
255 zprop_source_t src = ZPROP_SRC_DEFAULT;
258 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL)
261 switch (za.za_integer_length) {
263 /* integer property */
264 if (za.za_first_integer !=
265 zpool_prop_default_numeric(prop))
266 src = ZPROP_SRC_LOCAL;
268 if (prop == ZPOOL_PROP_BOOTFS) {
270 dsl_dataset_t *ds = NULL;
272 dp = spa_get_dsl(spa);
273 rw_enter(&dp->dp_config_rwlock, RW_READER);
274 if (err = dsl_dataset_hold_obj(dp,
275 za.za_first_integer, FTAG, &ds)) {
276 rw_exit(&dp->dp_config_rwlock);
281 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1,
283 dsl_dataset_name(ds, strval);
284 dsl_dataset_rele(ds, FTAG);
285 rw_exit(&dp->dp_config_rwlock);
288 intval = za.za_first_integer;
291 spa_prop_add_list(*nvp, prop, strval, intval, src);
295 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1);
300 /* string property */
301 strval = kmem_alloc(za.za_num_integers, KM_SLEEP);
302 err = zap_lookup(mos, spa->spa_pool_props_object,
303 za.za_name, 1, za.za_num_integers, strval);
305 kmem_free(strval, za.za_num_integers);
308 spa_prop_add_list(*nvp, prop, strval, 0, src);
309 kmem_free(strval, za.za_num_integers);
316 zap_cursor_fini(&zc);
317 mutex_exit(&spa->spa_props_lock);
319 if (err && err != ENOENT) {
329 * Validate the given pool properties nvlist and modify the list
330 * for the property values to be set.
333 spa_prop_validate(spa_t *spa, nvlist_t *props)
336 int error = 0, reset_bootfs = 0;
340 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
342 char *propname, *strval;
347 propname = nvpair_name(elem);
349 if ((prop = zpool_name_to_prop(propname)) == ZPROP_INVAL)
353 case ZPOOL_PROP_VERSION:
354 error = nvpair_value_uint64(elem, &intval);
356 (intval < spa_version(spa) || intval > SPA_VERSION))
360 case ZPOOL_PROP_DELEGATION:
361 case ZPOOL_PROP_AUTOREPLACE:
362 case ZPOOL_PROP_LISTSNAPS:
363 case ZPOOL_PROP_AUTOEXPAND:
364 error = nvpair_value_uint64(elem, &intval);
365 if (!error && intval > 1)
369 case ZPOOL_PROP_BOOTFS:
371 * If the pool version is less than SPA_VERSION_BOOTFS,
372 * or the pool is still being created (version == 0),
373 * the bootfs property cannot be set.
375 if (spa_version(spa) < SPA_VERSION_BOOTFS) {
381 * Make sure the vdev config is bootable
383 if (!vdev_is_bootable(spa->spa_root_vdev)) {
390 error = nvpair_value_string(elem, &strval);
395 if (strval == NULL || strval[0] == '\0') {
396 objnum = zpool_prop_default_numeric(
401 if (error = dmu_objset_hold(strval, FTAG, &os))
404 /* Must be ZPL and not gzip compressed. */
406 if (dmu_objset_type(os) != DMU_OST_ZFS) {
408 } else if ((error = dsl_prop_get_integer(strval,
409 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
410 &compress, NULL)) == 0 &&
411 !BOOTFS_COMPRESS_VALID(compress)) {
414 objnum = dmu_objset_id(os);
416 dmu_objset_rele(os, FTAG);
420 case ZPOOL_PROP_FAILUREMODE:
421 error = nvpair_value_uint64(elem, &intval);
422 if (!error && (intval < ZIO_FAILURE_MODE_WAIT ||
423 intval > ZIO_FAILURE_MODE_PANIC))
427 * This is a special case which only occurs when
428 * the pool has completely failed. This allows
429 * the user to change the in-core failmode property
430 * without syncing it out to disk (I/Os might
431 * currently be blocked). We do this by returning
432 * EIO to the caller (spa_prop_set) to trick it
433 * into thinking we encountered a property validation
436 if (!error && spa_suspended(spa)) {
437 spa->spa_failmode = intval;
442 case ZPOOL_PROP_CACHEFILE:
443 if ((error = nvpair_value_string(elem, &strval)) != 0)
446 if (strval[0] == '\0')
449 if (strcmp(strval, "none") == 0)
452 if (strval[0] != '/') {
457 slash = strrchr(strval, '/');
458 ASSERT(slash != NULL);
460 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 ||
461 strcmp(slash, "/..") == 0)
465 case ZPOOL_PROP_DEDUPDITTO:
466 if (spa_version(spa) < SPA_VERSION_DEDUP)
469 error = nvpair_value_uint64(elem, &intval);
471 intval != 0 && intval < ZIO_DEDUPDITTO_MIN)
480 if (!error && reset_bootfs) {
481 error = nvlist_remove(props,
482 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING);
485 error = nvlist_add_uint64(props,
486 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum);
494 spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync)
497 spa_config_dirent_t *dp;
499 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE),
503 dp = kmem_alloc(sizeof (spa_config_dirent_t),
506 if (cachefile[0] == '\0')
507 dp->scd_path = spa_strdup(spa_config_path);
508 else if (strcmp(cachefile, "none") == 0)
511 dp->scd_path = spa_strdup(cachefile);
513 list_insert_head(&spa->spa_config_list, dp);
515 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
519 spa_prop_set(spa_t *spa, nvlist_t *nvp)
523 boolean_t need_sync = B_FALSE;
526 if ((error = spa_prop_validate(spa, nvp)) != 0)
530 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) {
531 if ((prop = zpool_name_to_prop(
532 nvpair_name(elem))) == ZPROP_INVAL)
535 if (prop == ZPOOL_PROP_CACHEFILE ||
536 prop == ZPOOL_PROP_ALTROOT ||
537 prop == ZPOOL_PROP_READONLY)
545 return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props,
552 * If the bootfs property value is dsobj, clear it.
555 spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx)
557 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) {
558 VERIFY(zap_remove(spa->spa_meta_objset,
559 spa->spa_pool_props_object,
560 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0);
566 * ==========================================================================
567 * SPA state manipulation (open/create/destroy/import/export)
568 * ==========================================================================
572 spa_error_entry_compare(const void *a, const void *b)
574 spa_error_entry_t *sa = (spa_error_entry_t *)a;
575 spa_error_entry_t *sb = (spa_error_entry_t *)b;
578 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark,
579 sizeof (zbookmark_t));
590 * Utility function which retrieves copies of the current logs and
591 * re-initializes them in the process.
594 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub)
596 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock));
598 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t));
599 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t));
601 avl_create(&spa->spa_errlist_scrub,
602 spa_error_entry_compare, sizeof (spa_error_entry_t),
603 offsetof(spa_error_entry_t, se_avl));
604 avl_create(&spa->spa_errlist_last,
605 spa_error_entry_compare, sizeof (spa_error_entry_t),
606 offsetof(spa_error_entry_t, se_avl));
610 spa_taskq_create(spa_t *spa, const char *name, enum zti_modes mode,
613 uint_t flags = TASKQ_PREPOPULATE;
614 boolean_t batch = B_FALSE;
618 return (NULL); /* no taskq needed */
621 ASSERT3U(value, >=, 1);
622 value = MAX(value, 1);
627 flags |= TASKQ_THREADS_CPU_PCT;
628 value = zio_taskq_batch_pct;
631 case zti_mode_online_percent:
632 flags |= TASKQ_THREADS_CPU_PCT;
636 panic("unrecognized mode for %s taskq (%u:%u) in "
642 if (zio_taskq_sysdc && spa->spa_proc != &p0) {
644 flags |= TASKQ_DC_BATCH;
646 return (taskq_create_sysdc(name, value, 50, INT_MAX,
647 spa->spa_proc, zio_taskq_basedc, flags));
649 return (taskq_create_proc(name, value, maxclsyspri, 50, INT_MAX,
650 spa->spa_proc, flags));
654 spa_create_zio_taskqs(spa_t *spa)
658 for (t = 0; t < ZIO_TYPES; t++) {
659 for (q = 0; q < ZIO_TASKQ_TYPES; q++) {
660 const zio_taskq_info_t *ztip = &zio_taskqs[t][q];
661 enum zti_modes mode = ztip->zti_mode;
662 uint_t value = ztip->zti_value;
665 (void) snprintf(name, sizeof (name),
666 "%s_%s", zio_type_name[t], zio_taskq_types[q]);
668 spa->spa_zio_taskq[t][q] =
669 spa_taskq_create(spa, name, mode, value);
676 spa_thread(void *arg)
681 user_t *pu = PTOU(curproc);
683 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr,
686 ASSERT(curproc != &p0);
687 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs),
688 "zpool-%s", spa->spa_name);
689 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm));
691 /* bind this thread to the requested psrset */
692 if (zio_taskq_psrset_bind != PS_NONE) {
694 mutex_enter(&cpu_lock);
695 mutex_enter(&pidlock);
696 mutex_enter(&curproc->p_lock);
698 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind,
699 0, NULL, NULL) == 0) {
700 curthread->t_bind_pset = zio_taskq_psrset_bind;
703 "Couldn't bind process for zfs pool \"%s\" to "
704 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind);
707 mutex_exit(&curproc->p_lock);
708 mutex_exit(&pidlock);
709 mutex_exit(&cpu_lock);
713 if (zio_taskq_sysdc) {
714 sysdc_thread_enter(curthread, 100, 0);
717 spa->spa_proc = curproc;
718 spa->spa_did = curthread->t_did;
720 spa_create_zio_taskqs(spa);
722 mutex_enter(&spa->spa_proc_lock);
723 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED);
725 spa->spa_proc_state = SPA_PROC_ACTIVE;
726 cv_broadcast(&spa->spa_proc_cv);
728 CALLB_CPR_SAFE_BEGIN(&cprinfo);
729 while (spa->spa_proc_state == SPA_PROC_ACTIVE)
730 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock);
731 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock);
733 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE);
734 spa->spa_proc_state = SPA_PROC_GONE;
736 cv_broadcast(&spa->spa_proc_cv);
737 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */
739 mutex_enter(&curproc->p_lock);
745 * Activate an uninitialized pool.
748 spa_activate(spa_t *spa, int mode)
750 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED);
752 spa->spa_state = POOL_STATE_ACTIVE;
753 spa->spa_mode = mode;
755 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops);
756 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops);
758 /* Try to create a covering process */
759 mutex_enter(&spa->spa_proc_lock);
760 ASSERT(spa->spa_proc_state == SPA_PROC_NONE);
761 ASSERT(spa->spa_proc == &p0);
764 /* Only create a process if we're going to be around a while. */
765 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) {
766 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri,
768 spa->spa_proc_state = SPA_PROC_CREATED;
769 while (spa->spa_proc_state == SPA_PROC_CREATED) {
770 cv_wait(&spa->spa_proc_cv,
771 &spa->spa_proc_lock);
773 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE);
774 ASSERT(spa->spa_proc != &p0);
775 ASSERT(spa->spa_did != 0);
779 "Couldn't create process for zfs pool \"%s\"\n",
784 mutex_exit(&spa->spa_proc_lock);
786 /* If we didn't create a process, we need to create our taskqs. */
787 if (spa->spa_proc == &p0) {
788 spa_create_zio_taskqs(spa);
791 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t),
792 offsetof(vdev_t, vdev_config_dirty_node));
793 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t),
794 offsetof(vdev_t, vdev_state_dirty_node));
796 txg_list_create(&spa->spa_vdev_txg_list,
797 offsetof(struct vdev, vdev_txg_node));
799 avl_create(&spa->spa_errlist_scrub,
800 spa_error_entry_compare, sizeof (spa_error_entry_t),
801 offsetof(spa_error_entry_t, se_avl));
802 avl_create(&spa->spa_errlist_last,
803 spa_error_entry_compare, sizeof (spa_error_entry_t),
804 offsetof(spa_error_entry_t, se_avl));
808 * Opposite of spa_activate().
811 spa_deactivate(spa_t *spa)
815 ASSERT(spa->spa_sync_on == B_FALSE);
816 ASSERT(spa->spa_dsl_pool == NULL);
817 ASSERT(spa->spa_root_vdev == NULL);
818 ASSERT(spa->spa_async_zio_root == NULL);
819 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED);
821 txg_list_destroy(&spa->spa_vdev_txg_list);
823 list_destroy(&spa->spa_config_dirty_list);
824 list_destroy(&spa->spa_state_dirty_list);
826 for (t = 0; t < ZIO_TYPES; t++) {
827 for (q = 0; q < ZIO_TASKQ_TYPES; q++) {
828 if (spa->spa_zio_taskq[t][q] != NULL)
829 taskq_destroy(spa->spa_zio_taskq[t][q]);
830 spa->spa_zio_taskq[t][q] = NULL;
834 metaslab_class_destroy(spa->spa_normal_class);
835 spa->spa_normal_class = NULL;
837 metaslab_class_destroy(spa->spa_log_class);
838 spa->spa_log_class = NULL;
841 * If this was part of an import or the open otherwise failed, we may
842 * still have errors left in the queues. Empty them just in case.
844 spa_errlog_drain(spa);
846 avl_destroy(&spa->spa_errlist_scrub);
847 avl_destroy(&spa->spa_errlist_last);
849 spa->spa_state = POOL_STATE_UNINITIALIZED;
851 mutex_enter(&spa->spa_proc_lock);
852 if (spa->spa_proc_state != SPA_PROC_NONE) {
853 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE);
854 spa->spa_proc_state = SPA_PROC_DEACTIVATE;
855 cv_broadcast(&spa->spa_proc_cv);
856 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) {
857 ASSERT(spa->spa_proc != &p0);
858 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock);
860 ASSERT(spa->spa_proc_state == SPA_PROC_GONE);
861 spa->spa_proc_state = SPA_PROC_NONE;
863 ASSERT(spa->spa_proc == &p0);
864 mutex_exit(&spa->spa_proc_lock);
867 * We want to make sure spa_thread() has actually exited the ZFS
868 * module, so that the module can't be unloaded out from underneath
871 if (spa->spa_did != 0) {
872 thread_join(spa->spa_did);
878 * Verify a pool configuration, and construct the vdev tree appropriately. This
879 * will create all the necessary vdevs in the appropriate layout, with each vdev
880 * in the CLOSED state. This will prep the pool before open/creation/import.
881 * All vdev validation is done by the vdev_alloc() routine.
884 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent,
885 uint_t id, int atype)
892 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0)
895 if ((*vdp)->vdev_ops->vdev_op_leaf)
898 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
910 for (c = 0; c < children; c++) {
912 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c,
920 ASSERT(*vdp != NULL);
926 * Opposite of spa_load().
929 spa_unload(spa_t *spa)
933 ASSERT(MUTEX_HELD(&spa_namespace_lock));
938 spa_async_suspend(spa);
943 if (spa->spa_sync_on) {
944 txg_sync_stop(spa->spa_dsl_pool);
945 spa->spa_sync_on = B_FALSE;
949 * Wait for any outstanding async I/O to complete.
951 if (spa->spa_async_zio_root != NULL) {
952 (void) zio_wait(spa->spa_async_zio_root);
953 spa->spa_async_zio_root = NULL;
956 bpobj_close(&spa->spa_deferred_bpobj);
959 * Close the dsl pool.
961 if (spa->spa_dsl_pool) {
962 dsl_pool_close(spa->spa_dsl_pool);
963 spa->spa_dsl_pool = NULL;
964 spa->spa_meta_objset = NULL;
969 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
972 * Drop and purge level 2 cache
974 spa_l2cache_drop(spa);
979 if (spa->spa_root_vdev)
980 vdev_free(spa->spa_root_vdev);
981 ASSERT(spa->spa_root_vdev == NULL);
983 for (i = 0; i < spa->spa_spares.sav_count; i++)
984 vdev_free(spa->spa_spares.sav_vdevs[i]);
985 if (spa->spa_spares.sav_vdevs) {
986 kmem_free(spa->spa_spares.sav_vdevs,
987 spa->spa_spares.sav_count * sizeof (void *));
988 spa->spa_spares.sav_vdevs = NULL;
990 if (spa->spa_spares.sav_config) {
991 nvlist_free(spa->spa_spares.sav_config);
992 spa->spa_spares.sav_config = NULL;
994 spa->spa_spares.sav_count = 0;
996 for (i = 0; i < spa->spa_l2cache.sav_count; i++)
997 vdev_free(spa->spa_l2cache.sav_vdevs[i]);
998 if (spa->spa_l2cache.sav_vdevs) {
999 kmem_free(spa->spa_l2cache.sav_vdevs,
1000 spa->spa_l2cache.sav_count * sizeof (void *));
1001 spa->spa_l2cache.sav_vdevs = NULL;
1003 if (spa->spa_l2cache.sav_config) {
1004 nvlist_free(spa->spa_l2cache.sav_config);
1005 spa->spa_l2cache.sav_config = NULL;
1007 spa->spa_l2cache.sav_count = 0;
1009 spa->spa_async_suspended = 0;
1011 spa_config_exit(spa, SCL_ALL, FTAG);
1015 * Load (or re-load) the current list of vdevs describing the active spares for
1016 * this pool. When this is called, we have some form of basic information in
1017 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1018 * then re-generate a more complete list including status information.
1021 spa_load_spares(spa_t *spa)
1028 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1031 * First, close and free any existing spare vdevs.
1033 for (i = 0; i < spa->spa_spares.sav_count; i++) {
1034 vd = spa->spa_spares.sav_vdevs[i];
1036 /* Undo the call to spa_activate() below */
1037 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
1038 B_FALSE)) != NULL && tvd->vdev_isspare)
1039 spa_spare_remove(tvd);
1044 if (spa->spa_spares.sav_vdevs)
1045 kmem_free(spa->spa_spares.sav_vdevs,
1046 spa->spa_spares.sav_count * sizeof (void *));
1048 if (spa->spa_spares.sav_config == NULL)
1051 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
1052 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
1054 spa->spa_spares.sav_count = (int)nspares;
1055 spa->spa_spares.sav_vdevs = NULL;
1061 * Construct the array of vdevs, opening them to get status in the
1062 * process. For each spare, there is potentially two different vdev_t
1063 * structures associated with it: one in the list of spares (used only
1064 * for basic validation purposes) and one in the active vdev
1065 * configuration (if it's spared in). During this phase we open and
1066 * validate each vdev on the spare list. If the vdev also exists in the
1067 * active configuration, then we also mark this vdev as an active spare.
1069 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *),
1071 for (i = 0; i < spa->spa_spares.sav_count; i++) {
1072 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0,
1073 VDEV_ALLOC_SPARE) == 0);
1076 spa->spa_spares.sav_vdevs[i] = vd;
1078 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
1079 B_FALSE)) != NULL) {
1080 if (!tvd->vdev_isspare)
1084 * We only mark the spare active if we were successfully
1085 * able to load the vdev. Otherwise, importing a pool
1086 * with a bad active spare would result in strange
1087 * behavior, because multiple pool would think the spare
1088 * is actively in use.
1090 * There is a vulnerability here to an equally bizarre
1091 * circumstance, where a dead active spare is later
1092 * brought back to life (onlined or otherwise). Given
1093 * the rarity of this scenario, and the extra complexity
1094 * it adds, we ignore the possibility.
1096 if (!vdev_is_dead(tvd))
1097 spa_spare_activate(tvd);
1101 vd->vdev_aux = &spa->spa_spares;
1103 if (vdev_open(vd) != 0)
1106 if (vdev_validate_aux(vd) == 0)
1111 * Recompute the stashed list of spares, with status information
1114 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES,
1115 DATA_TYPE_NVLIST_ARRAY) == 0);
1117 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *),
1119 for (i = 0; i < spa->spa_spares.sav_count; i++)
1120 spares[i] = vdev_config_generate(spa,
1121 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE);
1122 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
1123 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0);
1124 for (i = 0; i < spa->spa_spares.sav_count; i++)
1125 nvlist_free(spares[i]);
1126 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *));
1130 * Load (or re-load) the current list of vdevs describing the active l2cache for
1131 * this pool. When this is called, we have some form of basic information in
1132 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1133 * then re-generate a more complete list including status information.
1134 * Devices which are already active have their details maintained, and are
1138 spa_load_l2cache(spa_t *spa)
1142 int i, j, oldnvdevs;
1144 vdev_t *vd, **oldvdevs, **newvdevs;
1145 spa_aux_vdev_t *sav = &spa->spa_l2cache;
1147 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1149 if (sav->sav_config != NULL) {
1150 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config,
1151 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
1152 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP);
1157 oldvdevs = sav->sav_vdevs;
1158 oldnvdevs = sav->sav_count;
1159 sav->sav_vdevs = NULL;
1163 * Process new nvlist of vdevs.
1165 for (i = 0; i < nl2cache; i++) {
1166 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID,
1170 for (j = 0; j < oldnvdevs; j++) {
1172 if (vd != NULL && guid == vd->vdev_guid) {
1174 * Retain previous vdev for add/remove ops.
1182 if (newvdevs[i] == NULL) {
1186 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0,
1187 VDEV_ALLOC_L2CACHE) == 0);
1192 * Commit this vdev as an l2cache device,
1193 * even if it fails to open.
1195 spa_l2cache_add(vd);
1200 spa_l2cache_activate(vd);
1202 if (vdev_open(vd) != 0)
1205 (void) vdev_validate_aux(vd);
1207 if (!vdev_is_dead(vd))
1208 l2arc_add_vdev(spa, vd);
1213 * Purge vdevs that were dropped
1215 for (i = 0; i < oldnvdevs; i++) {
1220 if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
1221 pool != 0ULL && l2arc_vdev_present(vd))
1222 l2arc_remove_vdev(vd);
1223 (void) vdev_close(vd);
1224 spa_l2cache_remove(vd);
1229 kmem_free(oldvdevs, oldnvdevs * sizeof (void *));
1231 if (sav->sav_config == NULL)
1234 sav->sav_vdevs = newvdevs;
1235 sav->sav_count = (int)nl2cache;
1238 * Recompute the stashed list of l2cache devices, with status
1239 * information this time.
1241 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE,
1242 DATA_TYPE_NVLIST_ARRAY) == 0);
1244 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
1245 for (i = 0; i < sav->sav_count; i++)
1246 l2cache[i] = vdev_config_generate(spa,
1247 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE);
1248 VERIFY(nvlist_add_nvlist_array(sav->sav_config,
1249 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0);
1251 for (i = 0; i < sav->sav_count; i++)
1252 nvlist_free(l2cache[i]);
1254 kmem_free(l2cache, sav->sav_count * sizeof (void *));
1258 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value)
1261 char *packed = NULL;
1266 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db));
1267 nvsize = *(uint64_t *)db->db_data;
1268 dmu_buf_rele(db, FTAG);
1270 packed = kmem_alloc(nvsize, KM_SLEEP);
1271 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed,
1274 error = nvlist_unpack(packed, nvsize, value, 0);
1275 kmem_free(packed, nvsize);
1281 * Checks to see if the given vdev could not be opened, in which case we post a
1282 * sysevent to notify the autoreplace code that the device has been removed.
1285 spa_check_removed(vdev_t *vd)
1289 for (c = 0; c < vd->vdev_children; c++)
1290 spa_check_removed(vd->vdev_child[c]);
1292 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd)) {
1293 zfs_post_autoreplace(vd->vdev_spa, vd);
1294 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK);
1299 * Validate the current config against the MOS config
1302 spa_config_valid(spa_t *spa, nvlist_t *config)
1304 vdev_t *mrvd, *rvd = spa->spa_root_vdev;
1308 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0);
1310 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1311 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0);
1313 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children);
1316 * If we're doing a normal import, then build up any additional
1317 * diagnostic information about missing devices in this config.
1318 * We'll pass this up to the user for further processing.
1320 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) {
1321 nvlist_t **child, *nv;
1324 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **),
1326 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1328 for (c = 0; c < rvd->vdev_children; c++) {
1329 vdev_t *tvd = rvd->vdev_child[c];
1330 vdev_t *mtvd = mrvd->vdev_child[c];
1332 if (tvd->vdev_ops == &vdev_missing_ops &&
1333 mtvd->vdev_ops != &vdev_missing_ops &&
1335 child[idx++] = vdev_config_generate(spa, mtvd,
1340 VERIFY(nvlist_add_nvlist_array(nv,
1341 ZPOOL_CONFIG_CHILDREN, child, idx) == 0);
1342 VERIFY(nvlist_add_nvlist(spa->spa_load_info,
1343 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0);
1345 for (i = 0; i < idx; i++)
1346 nvlist_free(child[i]);
1349 kmem_free(child, rvd->vdev_children * sizeof (char **));
1353 * Compare the root vdev tree with the information we have
1354 * from the MOS config (mrvd). Check each top-level vdev
1355 * with the corresponding MOS config top-level (mtvd).
1357 for (c = 0; c < rvd->vdev_children; c++) {
1358 vdev_t *tvd = rvd->vdev_child[c];
1359 vdev_t *mtvd = mrvd->vdev_child[c];
1362 * Resolve any "missing" vdevs in the current configuration.
1363 * If we find that the MOS config has more accurate information
1364 * about the top-level vdev then use that vdev instead.
1366 if (tvd->vdev_ops == &vdev_missing_ops &&
1367 mtvd->vdev_ops != &vdev_missing_ops) {
1369 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG))
1373 * Device specific actions.
1375 if (mtvd->vdev_islog) {
1376 spa_set_log_state(spa, SPA_LOG_CLEAR);
1379 * XXX - once we have 'readonly' pool
1380 * support we should be able to handle
1381 * missing data devices by transitioning
1382 * the pool to readonly.
1388 * Swap the missing vdev with the data we were
1389 * able to obtain from the MOS config.
1391 vdev_remove_child(rvd, tvd);
1392 vdev_remove_child(mrvd, mtvd);
1394 vdev_add_child(rvd, mtvd);
1395 vdev_add_child(mrvd, tvd);
1397 spa_config_exit(spa, SCL_ALL, FTAG);
1399 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1402 } else if (mtvd->vdev_islog) {
1404 * Load the slog device's state from the MOS config
1405 * since it's possible that the label does not
1406 * contain the most up-to-date information.
1408 vdev_load_log_state(tvd, mtvd);
1413 spa_config_exit(spa, SCL_ALL, FTAG);
1416 * Ensure we were able to validate the config.
1418 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum);
1422 * Check for missing log devices
1425 spa_check_logs(spa_t *spa)
1427 switch (spa->spa_log_state) {
1428 case SPA_LOG_MISSING:
1429 /* need to recheck in case slog has been restored */
1430 case SPA_LOG_UNKNOWN:
1431 if (dmu_objset_find(spa->spa_name, zil_check_log_chain, NULL,
1432 DS_FIND_CHILDREN)) {
1433 spa_set_log_state(spa, SPA_LOG_MISSING);
1442 spa_passivate_log(spa_t *spa)
1444 vdev_t *rvd = spa->spa_root_vdev;
1445 boolean_t slog_found = B_FALSE;
1448 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER));
1450 if (!spa_has_slogs(spa))
1453 for (c = 0; c < rvd->vdev_children; c++) {
1454 vdev_t *tvd = rvd->vdev_child[c];
1455 metaslab_group_t *mg = tvd->vdev_mg;
1457 if (tvd->vdev_islog) {
1458 metaslab_group_passivate(mg);
1459 slog_found = B_TRUE;
1463 return (slog_found);
1467 spa_activate_log(spa_t *spa)
1469 vdev_t *rvd = spa->spa_root_vdev;
1472 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER));
1474 for (c = 0; c < rvd->vdev_children; c++) {
1475 vdev_t *tvd = rvd->vdev_child[c];
1476 metaslab_group_t *mg = tvd->vdev_mg;
1478 if (tvd->vdev_islog)
1479 metaslab_group_activate(mg);
1484 spa_offline_log(spa_t *spa)
1488 if ((error = dmu_objset_find(spa_name(spa), zil_vdev_offline,
1489 NULL, DS_FIND_CHILDREN)) == 0) {
1492 * We successfully offlined the log device, sync out the
1493 * current txg so that the "stubby" block can be removed
1496 txg_wait_synced(spa->spa_dsl_pool, 0);
1502 spa_aux_check_removed(spa_aux_vdev_t *sav)
1506 for (i = 0; i < sav->sav_count; i++)
1507 spa_check_removed(sav->sav_vdevs[i]);
1511 spa_claim_notify(zio_t *zio)
1513 spa_t *spa = zio->io_spa;
1518 mutex_enter(&spa->spa_props_lock); /* any mutex will do */
1519 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth)
1520 spa->spa_claim_max_txg = zio->io_bp->blk_birth;
1521 mutex_exit(&spa->spa_props_lock);
1524 typedef struct spa_load_error {
1525 uint64_t sle_meta_count;
1526 uint64_t sle_data_count;
1530 spa_load_verify_done(zio_t *zio)
1532 blkptr_t *bp = zio->io_bp;
1533 spa_load_error_t *sle = zio->io_private;
1534 dmu_object_type_t type = BP_GET_TYPE(bp);
1535 int error = zio->io_error;
1538 if ((BP_GET_LEVEL(bp) != 0 || dmu_ot[type].ot_metadata) &&
1539 type != DMU_OT_INTENT_LOG)
1540 atomic_add_64(&sle->sle_meta_count, 1);
1542 atomic_add_64(&sle->sle_data_count, 1);
1544 zio_data_buf_free(zio->io_data, zio->io_size);
1549 spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
1550 arc_buf_t *pbuf, const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
1554 size_t size = BP_GET_PSIZE(bp);
1555 void *data = zio_data_buf_alloc(size);
1557 zio_nowait(zio_read(rio, spa, bp, data, size,
1558 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB,
1559 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL |
1560 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb));
1566 spa_load_verify(spa_t *spa)
1569 spa_load_error_t sle = { 0 };
1570 zpool_rewind_policy_t policy;
1571 boolean_t verify_ok = B_FALSE;
1574 zpool_get_rewind_policy(spa->spa_config, &policy);
1576 if (policy.zrp_request & ZPOOL_NEVER_REWIND)
1579 rio = zio_root(spa, NULL, &sle,
1580 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
1582 error = traverse_pool(spa, spa->spa_verify_min_txg,
1583 TRAVERSE_PRE | TRAVERSE_PREFETCH, spa_load_verify_cb, rio);
1585 (void) zio_wait(rio);
1587 spa->spa_load_meta_errors = sle.sle_meta_count;
1588 spa->spa_load_data_errors = sle.sle_data_count;
1590 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta &&
1591 sle.sle_data_count <= policy.zrp_maxdata) {
1595 spa->spa_load_txg = spa->spa_uberblock.ub_txg;
1596 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp;
1598 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts;
1599 VERIFY(nvlist_add_uint64(spa->spa_load_info,
1600 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0);
1601 VERIFY(nvlist_add_int64(spa->spa_load_info,
1602 ZPOOL_CONFIG_REWIND_TIME, loss) == 0);
1603 VERIFY(nvlist_add_uint64(spa->spa_load_info,
1604 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0);
1606 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg;
1610 if (error != ENXIO && error != EIO)
1615 return (verify_ok ? 0 : EIO);
1619 * Find a value in the pool props object.
1622 spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val)
1624 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object,
1625 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val);
1629 * Find a value in the pool directory object.
1632 spa_dir_prop(spa_t *spa, const char *name, uint64_t *val)
1634 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
1635 name, sizeof (uint64_t), 1, val));
1639 spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err)
1641 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux);
1646 * Fix up config after a partly-completed split. This is done with the
1647 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
1648 * pool have that entry in their config, but only the splitting one contains
1649 * a list of all the guids of the vdevs that are being split off.
1651 * This function determines what to do with that list: either rejoin
1652 * all the disks to the pool, or complete the splitting process. To attempt
1653 * the rejoin, each disk that is offlined is marked online again, and
1654 * we do a reopen() call. If the vdev label for every disk that was
1655 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
1656 * then we call vdev_split() on each disk, and complete the split.
1658 * Otherwise we leave the config alone, with all the vdevs in place in
1659 * the original pool.
1662 spa_try_repair(spa_t *spa, nvlist_t *config)
1669 boolean_t attempt_reopen;
1671 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0)
1674 /* check that the config is complete */
1675 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST,
1676 &glist, &gcount) != 0)
1679 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP);
1681 /* attempt to online all the vdevs & validate */
1682 attempt_reopen = B_TRUE;
1683 for (i = 0; i < gcount; i++) {
1684 if (glist[i] == 0) /* vdev is hole */
1687 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE);
1688 if (vd[i] == NULL) {
1690 * Don't bother attempting to reopen the disks;
1691 * just do the split.
1693 attempt_reopen = B_FALSE;
1695 /* attempt to re-online it */
1696 vd[i]->vdev_offline = B_FALSE;
1700 if (attempt_reopen) {
1701 vdev_reopen(spa->spa_root_vdev);
1703 /* check each device to see what state it's in */
1704 for (extracted = 0, i = 0; i < gcount; i++) {
1705 if (vd[i] != NULL &&
1706 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL)
1713 * If every disk has been moved to the new pool, or if we never
1714 * even attempted to look at them, then we split them off for
1717 if (!attempt_reopen || gcount == extracted) {
1718 for (i = 0; i < gcount; i++)
1721 vdev_reopen(spa->spa_root_vdev);
1724 kmem_free(vd, gcount * sizeof (vdev_t *));
1728 spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type,
1729 boolean_t mosconfig)
1731 nvlist_t *config = spa->spa_config;
1732 char *ereport = FM_EREPORT_ZFS_POOL;
1737 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid))
1741 * Versioning wasn't explicitly added to the label until later, so if
1742 * it's not present treat it as the initial version.
1744 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
1745 &spa->spa_ubsync.ub_version) != 0)
1746 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
1748 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG,
1749 &spa->spa_config_txg);
1751 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) &&
1752 spa_guid_exists(pool_guid, 0)) {
1755 spa->spa_load_guid = pool_guid;
1757 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT,
1759 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting,
1763 gethrestime(&spa->spa_loaded_ts);
1764 error = spa_load_impl(spa, pool_guid, config, state, type,
1765 mosconfig, &ereport);
1768 spa->spa_minref = refcount_count(&spa->spa_refcount);
1770 if (error != EEXIST) {
1771 spa->spa_loaded_ts.tv_sec = 0;
1772 spa->spa_loaded_ts.tv_nsec = 0;
1774 if (error != EBADF) {
1775 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0);
1778 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE;
1785 * Load an existing storage pool, using the pool's builtin spa_config as a
1786 * source of configuration information.
1789 spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config,
1790 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig,
1794 nvlist_t *nvroot = NULL;
1796 uberblock_t *ub = &spa->spa_uberblock;
1797 uint64_t children, config_cache_txg = spa->spa_config_txg;
1798 int orig_mode = spa->spa_mode;
1803 * If this is an untrusted config, access the pool in read-only mode.
1804 * This prevents things like resilvering recently removed devices.
1807 spa->spa_mode = FREAD;
1809 ASSERT(MUTEX_HELD(&spa_namespace_lock));
1811 spa->spa_load_state = state;
1813 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot))
1816 parse = (type == SPA_IMPORT_EXISTING ?
1817 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT);
1820 * Create "The Godfather" zio to hold all async IOs
1822 spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
1823 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER);
1826 * Parse the configuration into a vdev tree. We explicitly set the
1827 * value that will be returned by spa_version() since parsing the
1828 * configuration requires knowing the version number.
1830 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1831 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse);
1832 spa_config_exit(spa, SCL_ALL, FTAG);
1837 ASSERT(spa->spa_root_vdev == rvd);
1839 if (type != SPA_IMPORT_ASSEMBLE) {
1840 ASSERT(spa_guid(spa) == pool_guid);
1844 * Try to open all vdevs, loading each label in the process.
1846 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1847 error = vdev_open(rvd);
1848 spa_config_exit(spa, SCL_ALL, FTAG);
1853 * We need to validate the vdev labels against the configuration that
1854 * we have in hand, which is dependent on the setting of mosconfig. If
1855 * mosconfig is true then we're validating the vdev labels based on
1856 * that config. Otherwise, we're validating against the cached config
1857 * (zpool.cache) that was read when we loaded the zfs module, and then
1858 * later we will recursively call spa_load() and validate against
1861 * If we're assembling a new pool that's been split off from an
1862 * existing pool, the labels haven't yet been updated so we skip
1863 * validation for now.
1865 if (type != SPA_IMPORT_ASSEMBLE) {
1866 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1867 error = vdev_validate(rvd);
1868 spa_config_exit(spa, SCL_ALL, FTAG);
1873 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN)
1878 * Find the best uberblock.
1880 vdev_uberblock_load(NULL, rvd, ub);
1883 * If we weren't able to find a single valid uberblock, return failure.
1885 if (ub->ub_txg == 0)
1886 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO));
1889 * If the pool is newer than the code, we can't open it.
1891 if (ub->ub_version > SPA_VERSION)
1892 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP));
1895 * If the vdev guid sum doesn't match the uberblock, we have an
1896 * incomplete configuration. We first check to see if the pool
1897 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
1898 * If it is, defer the vdev_guid_sum check till later so we
1899 * can handle missing vdevs.
1901 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN,
1902 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE &&
1903 rvd->vdev_guid_sum != ub->ub_guid_sum)
1904 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO));
1906 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) {
1907 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1908 spa_try_repair(spa, config);
1909 spa_config_exit(spa, SCL_ALL, FTAG);
1910 nvlist_free(spa->spa_config_splitting);
1911 spa->spa_config_splitting = NULL;
1915 * Initialize internal SPA structures.
1917 spa->spa_state = POOL_STATE_ACTIVE;
1918 spa->spa_ubsync = spa->spa_uberblock;
1919 spa->spa_verify_min_txg = spa->spa_extreme_rewind ?
1920 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1;
1921 spa->spa_first_txg = spa->spa_last_ubsync_txg ?
1922 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1;
1923 spa->spa_claim_max_txg = spa->spa_first_txg;
1924 spa->spa_prev_software_version = ub->ub_software_version;
1926 error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool);
1928 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
1929 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset;
1931 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0)
1932 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
1936 nvlist_t *policy = NULL, *nvconfig;
1938 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0)
1939 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
1941 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig,
1942 ZPOOL_CONFIG_HOSTID, &hostid) == 0) {
1944 unsigned long myhostid = 0;
1946 VERIFY(nvlist_lookup_string(nvconfig,
1947 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0);
1950 myhostid = zone_get_hostid(NULL);
1953 * We're emulating the system's hostid in userland, so
1954 * we can't use zone_get_hostid().
1956 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid);
1957 #endif /* _KERNEL */
1958 if (hostid != 0 && myhostid != 0 &&
1959 hostid != myhostid) {
1960 nvlist_free(nvconfig);
1961 cmn_err(CE_WARN, "pool '%s' could not be "
1962 "loaded as it was last accessed by "
1963 "another system (host: %s hostid: 0x%lx). "
1964 "See: http://www.sun.com/msg/ZFS-8000-EY",
1965 spa_name(spa), hostname,
1966 (unsigned long)hostid);
1970 if (nvlist_lookup_nvlist(spa->spa_config,
1971 ZPOOL_REWIND_POLICY, &policy) == 0)
1972 VERIFY(nvlist_add_nvlist(nvconfig,
1973 ZPOOL_REWIND_POLICY, policy) == 0);
1975 spa_config_set(spa, nvconfig);
1977 spa_deactivate(spa);
1978 spa_activate(spa, orig_mode);
1980 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE));
1983 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0)
1984 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
1985 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj);
1987 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
1990 * Load the bit that tells us to use the new accounting function
1991 * (raid-z deflation). If we have an older pool, this will not
1994 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate);
1995 if (error != 0 && error != ENOENT)
1996 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
1998 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION,
1999 &spa->spa_creation_version);
2000 if (error != 0 && error != ENOENT)
2001 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2004 * Load the persistent error log. If we have an older pool, this will
2007 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last);
2008 if (error != 0 && error != ENOENT)
2009 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2011 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB,
2012 &spa->spa_errlog_scrub);
2013 if (error != 0 && error != ENOENT)
2014 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2017 * Load the history object. If we have an older pool, this
2018 * will not be present.
2020 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history);
2021 if (error != 0 && error != ENOENT)
2022 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2025 * If we're assembling the pool from the split-off vdevs of
2026 * an existing pool, we don't want to attach the spares & cache
2031 * Load any hot spares for this pool.
2033 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object);
2034 if (error != 0 && error != ENOENT)
2035 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2036 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) {
2037 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES);
2038 if (load_nvlist(spa, spa->spa_spares.sav_object,
2039 &spa->spa_spares.sav_config) != 0)
2040 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2042 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2043 spa_load_spares(spa);
2044 spa_config_exit(spa, SCL_ALL, FTAG);
2045 } else if (error == 0) {
2046 spa->spa_spares.sav_sync = B_TRUE;
2050 * Load any level 2 ARC devices for this pool.
2052 error = spa_dir_prop(spa, DMU_POOL_L2CACHE,
2053 &spa->spa_l2cache.sav_object);
2054 if (error != 0 && error != ENOENT)
2055 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2056 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) {
2057 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE);
2058 if (load_nvlist(spa, spa->spa_l2cache.sav_object,
2059 &spa->spa_l2cache.sav_config) != 0)
2060 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2062 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2063 spa_load_l2cache(spa);
2064 spa_config_exit(spa, SCL_ALL, FTAG);
2065 } else if (error == 0) {
2066 spa->spa_l2cache.sav_sync = B_TRUE;
2069 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
2071 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object);
2072 if (error && error != ENOENT)
2073 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2076 uint64_t autoreplace;
2078 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs);
2079 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace);
2080 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation);
2081 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode);
2082 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand);
2083 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO,
2084 &spa->spa_dedup_ditto);
2086 spa->spa_autoreplace = (autoreplace != 0);
2090 * If the 'autoreplace' property is set, then post a resource notifying
2091 * the ZFS DE that it should not issue any faults for unopenable
2092 * devices. We also iterate over the vdevs, and post a sysevent for any
2093 * unopenable vdevs so that the normal autoreplace handler can take
2096 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) {
2097 spa_check_removed(spa->spa_root_vdev);
2099 * For the import case, this is done in spa_import(), because
2100 * at this point we're using the spare definitions from
2101 * the MOS config, not necessarily from the userland config.
2103 if (state != SPA_LOAD_IMPORT) {
2104 spa_aux_check_removed(&spa->spa_spares);
2105 spa_aux_check_removed(&spa->spa_l2cache);
2110 * Load the vdev state for all toplevel vdevs.
2115 * Propagate the leaf DTLs we just loaded all the way up the tree.
2117 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2118 vdev_dtl_reassess(rvd, 0, 0, B_FALSE);
2119 spa_config_exit(spa, SCL_ALL, FTAG);
2122 * Load the DDTs (dedup tables).
2124 error = ddt_load(spa);
2126 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2128 spa_update_dspace(spa);
2131 * Validate the config, using the MOS config to fill in any
2132 * information which might be missing. If we fail to validate
2133 * the config then declare the pool unfit for use. If we're
2134 * assembling a pool from a split, the log is not transferred
2137 if (type != SPA_IMPORT_ASSEMBLE) {
2140 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0)
2141 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2143 if (!spa_config_valid(spa, nvconfig)) {
2144 nvlist_free(nvconfig);
2145 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM,
2148 nvlist_free(nvconfig);
2151 * Now that we've validate the config, check the state of the
2152 * root vdev. If it can't be opened, it indicates one or
2153 * more toplevel vdevs are faulted.
2155 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN)
2158 if (spa_check_logs(spa)) {
2159 *ereport = FM_EREPORT_ZFS_LOG_REPLAY;
2160 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO));
2165 * We've successfully opened the pool, verify that we're ready
2166 * to start pushing transactions.
2168 if (state != SPA_LOAD_TRYIMPORT) {
2169 if (error = spa_load_verify(spa))
2170 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA,
2174 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER ||
2175 spa->spa_load_max_txg == UINT64_MAX)) {
2177 int need_update = B_FALSE;
2180 ASSERT(state != SPA_LOAD_TRYIMPORT);
2183 * Claim log blocks that haven't been committed yet.
2184 * This must all happen in a single txg.
2185 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2186 * invoked from zil_claim_log_block()'s i/o done callback.
2187 * Price of rollback is that we abandon the log.
2189 spa->spa_claiming = B_TRUE;
2191 tx = dmu_tx_create_assigned(spa_get_dsl(spa),
2192 spa_first_txg(spa));
2193 (void) dmu_objset_find(spa_name(spa),
2194 zil_claim, tx, DS_FIND_CHILDREN);
2197 spa->spa_claiming = B_FALSE;
2199 spa_set_log_state(spa, SPA_LOG_GOOD);
2200 spa->spa_sync_on = B_TRUE;
2201 txg_sync_start(spa->spa_dsl_pool);
2204 * Wait for all claims to sync. We sync up to the highest
2205 * claimed log block birth time so that claimed log blocks
2206 * don't appear to be from the future. spa_claim_max_txg
2207 * will have been set for us by either zil_check_log_chain()
2208 * (invoked from spa_check_logs()) or zil_claim() above.
2210 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg);
2213 * If the config cache is stale, or we have uninitialized
2214 * metaslabs (see spa_vdev_add()), then update the config.
2216 * If this is a verbatim import, trust the current
2217 * in-core spa_config and update the disk labels.
2219 if (config_cache_txg != spa->spa_config_txg ||
2220 state == SPA_LOAD_IMPORT ||
2221 state == SPA_LOAD_RECOVER ||
2222 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM))
2223 need_update = B_TRUE;
2225 for (c = 0; c < rvd->vdev_children; c++)
2226 if (rvd->vdev_child[c]->vdev_ms_array == 0)
2227 need_update = B_TRUE;
2230 * Update the config cache asychronously in case we're the
2231 * root pool, in which case the config cache isn't writable yet.
2234 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
2237 * Check all DTLs to see if anything needs resilvering.
2239 if (!dsl_scan_resilvering(spa->spa_dsl_pool) &&
2240 vdev_resilver_needed(rvd, NULL, NULL))
2241 spa_async_request(spa, SPA_ASYNC_RESILVER);
2244 * Delete any inconsistent datasets.
2246 (void) dmu_objset_find(spa_name(spa),
2247 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN);
2250 * Clean up any stale temporary dataset userrefs.
2252 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool);
2259 spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig)
2261 int mode = spa->spa_mode;
2264 spa_deactivate(spa);
2266 spa->spa_load_max_txg--;
2268 spa_activate(spa, mode);
2269 spa_async_suspend(spa);
2271 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig));
2275 spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig,
2276 uint64_t max_request, int rewind_flags)
2278 nvlist_t *config = NULL;
2279 int load_error, rewind_error;
2280 uint64_t safe_rewind_txg;
2283 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) {
2284 spa->spa_load_max_txg = spa->spa_load_txg;
2285 spa_set_log_state(spa, SPA_LOG_CLEAR);
2287 spa->spa_load_max_txg = max_request;
2290 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING,
2292 if (load_error == 0)
2295 if (spa->spa_root_vdev != NULL)
2296 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
2298 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg;
2299 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp;
2301 if (rewind_flags & ZPOOL_NEVER_REWIND) {
2302 nvlist_free(config);
2303 return (load_error);
2306 /* Price of rolling back is discarding txgs, including log */
2307 if (state == SPA_LOAD_RECOVER)
2308 spa_set_log_state(spa, SPA_LOG_CLEAR);
2310 spa->spa_load_max_txg = spa->spa_last_ubsync_txg;
2311 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE;
2312 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ?
2313 TXG_INITIAL : safe_rewind_txg;
2316 * Continue as long as we're finding errors, we're still within
2317 * the acceptable rewind range, and we're still finding uberblocks
2319 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg &&
2320 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) {
2321 if (spa->spa_load_max_txg < safe_rewind_txg)
2322 spa->spa_extreme_rewind = B_TRUE;
2323 rewind_error = spa_load_retry(spa, state, mosconfig);
2326 spa->spa_extreme_rewind = B_FALSE;
2327 spa->spa_load_max_txg = UINT64_MAX;
2329 if (config && (rewind_error || state != SPA_LOAD_RECOVER))
2330 spa_config_set(spa, config);
2332 return (state == SPA_LOAD_RECOVER ? rewind_error : load_error);
2338 * The import case is identical to an open except that the configuration is sent
2339 * down from userland, instead of grabbed from the configuration cache. For the
2340 * case of an open, the pool configuration will exist in the
2341 * POOL_STATE_UNINITIALIZED state.
2343 * The stats information (gen/count/ustats) is used to gather vdev statistics at
2344 * the same time open the pool, without having to keep around the spa_t in some
2348 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy,
2352 spa_load_state_t state = SPA_LOAD_OPEN;
2354 int locked = B_FALSE;
2359 * As disgusting as this is, we need to support recursive calls to this
2360 * function because dsl_dir_open() is called during spa_load(), and ends
2361 * up calling spa_open() again. The real fix is to figure out how to
2362 * avoid dsl_dir_open() calling this in the first place.
2364 if (mutex_owner(&spa_namespace_lock) != curthread) {
2365 mutex_enter(&spa_namespace_lock);
2369 if ((spa = spa_lookup(pool)) == NULL) {
2371 mutex_exit(&spa_namespace_lock);
2375 if (spa->spa_state == POOL_STATE_UNINITIALIZED) {
2376 zpool_rewind_policy_t policy;
2378 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config,
2380 if (policy.zrp_request & ZPOOL_DO_REWIND)
2381 state = SPA_LOAD_RECOVER;
2383 spa_activate(spa, spa_mode_global);
2385 if (state != SPA_LOAD_RECOVER)
2386 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0;
2388 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg,
2389 policy.zrp_request);
2391 if (error == EBADF) {
2393 * If vdev_validate() returns failure (indicated by
2394 * EBADF), it indicates that one of the vdevs indicates
2395 * that the pool has been exported or destroyed. If
2396 * this is the case, the config cache is out of sync and
2397 * we should remove the pool from the namespace.
2400 spa_deactivate(spa);
2401 spa_config_sync(spa, B_TRUE, B_TRUE);
2404 mutex_exit(&spa_namespace_lock);
2410 * We can't open the pool, but we still have useful
2411 * information: the state of each vdev after the
2412 * attempted vdev_open(). Return this to the user.
2414 if (config != NULL && spa->spa_config) {
2415 VERIFY(nvlist_dup(spa->spa_config, config,
2417 VERIFY(nvlist_add_nvlist(*config,
2418 ZPOOL_CONFIG_LOAD_INFO,
2419 spa->spa_load_info) == 0);
2422 spa_deactivate(spa);
2423 spa->spa_last_open_failed = error;
2425 mutex_exit(&spa_namespace_lock);
2431 spa_open_ref(spa, tag);
2434 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
2437 * If we've recovered the pool, pass back any information we
2438 * gathered while doing the load.
2440 if (state == SPA_LOAD_RECOVER) {
2441 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO,
2442 spa->spa_load_info) == 0);
2446 spa->spa_last_open_failed = 0;
2447 spa->spa_last_ubsync_txg = 0;
2448 spa->spa_load_txg = 0;
2449 mutex_exit(&spa_namespace_lock);
2458 spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy,
2461 return (spa_open_common(name, spapp, tag, policy, config));
2465 spa_open(const char *name, spa_t **spapp, void *tag)
2467 return (spa_open_common(name, spapp, tag, NULL, NULL));
2471 * Lookup the given spa_t, incrementing the inject count in the process,
2472 * preventing it from being exported or destroyed.
2475 spa_inject_addref(char *name)
2479 mutex_enter(&spa_namespace_lock);
2480 if ((spa = spa_lookup(name)) == NULL) {
2481 mutex_exit(&spa_namespace_lock);
2484 spa->spa_inject_ref++;
2485 mutex_exit(&spa_namespace_lock);
2491 spa_inject_delref(spa_t *spa)
2493 mutex_enter(&spa_namespace_lock);
2494 spa->spa_inject_ref--;
2495 mutex_exit(&spa_namespace_lock);
2499 * Add spares device information to the nvlist.
2502 spa_add_spares(spa_t *spa, nvlist_t *config)
2512 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
2514 if (spa->spa_spares.sav_count == 0)
2517 VERIFY(nvlist_lookup_nvlist(config,
2518 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
2519 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
2520 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
2522 VERIFY(nvlist_add_nvlist_array(nvroot,
2523 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
2524 VERIFY(nvlist_lookup_nvlist_array(nvroot,
2525 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
2528 * Go through and find any spares which have since been
2529 * repurposed as an active spare. If this is the case, update
2530 * their status appropriately.
2532 for (i = 0; i < nspares; i++) {
2533 VERIFY(nvlist_lookup_uint64(spares[i],
2534 ZPOOL_CONFIG_GUID, &guid) == 0);
2535 if (spa_spare_exists(guid, &pool, NULL) &&
2537 VERIFY(nvlist_lookup_uint64_array(
2538 spares[i], ZPOOL_CONFIG_VDEV_STATS,
2539 (uint64_t **)&vs, &vsc) == 0);
2540 vs->vs_state = VDEV_STATE_CANT_OPEN;
2541 vs->vs_aux = VDEV_AUX_SPARED;
2548 * Add l2cache device information to the nvlist, including vdev stats.
2551 spa_add_l2cache(spa_t *spa, nvlist_t *config)
2554 uint_t i, j, nl2cache;
2561 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
2563 if (spa->spa_l2cache.sav_count == 0)
2566 VERIFY(nvlist_lookup_nvlist(config,
2567 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
2568 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
2569 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
2570 if (nl2cache != 0) {
2571 VERIFY(nvlist_add_nvlist_array(nvroot,
2572 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
2573 VERIFY(nvlist_lookup_nvlist_array(nvroot,
2574 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
2577 * Update level 2 cache device stats.
2580 for (i = 0; i < nl2cache; i++) {
2581 VERIFY(nvlist_lookup_uint64(l2cache[i],
2582 ZPOOL_CONFIG_GUID, &guid) == 0);
2585 for (j = 0; j < spa->spa_l2cache.sav_count; j++) {
2587 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) {
2588 vd = spa->spa_l2cache.sav_vdevs[j];
2594 VERIFY(nvlist_lookup_uint64_array(l2cache[i],
2595 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc)
2597 vdev_get_stats(vd, vs);
2603 spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen)
2609 error = spa_open_common(name, &spa, FTAG, NULL, config);
2613 * This still leaves a window of inconsistency where the spares
2614 * or l2cache devices could change and the config would be
2615 * self-inconsistent.
2617 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
2619 if (*config != NULL) {
2620 uint64_t loadtimes[2];
2622 loadtimes[0] = spa->spa_loaded_ts.tv_sec;
2623 loadtimes[1] = spa->spa_loaded_ts.tv_nsec;
2624 VERIFY(nvlist_add_uint64_array(*config,
2625 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0);
2627 VERIFY(nvlist_add_uint64(*config,
2628 ZPOOL_CONFIG_ERRCOUNT,
2629 spa_get_errlog_size(spa)) == 0);
2631 if (spa_suspended(spa))
2632 VERIFY(nvlist_add_uint64(*config,
2633 ZPOOL_CONFIG_SUSPENDED,
2634 spa->spa_failmode) == 0);
2636 spa_add_spares(spa, *config);
2637 spa_add_l2cache(spa, *config);
2642 * We want to get the alternate root even for faulted pools, so we cheat
2643 * and call spa_lookup() directly.
2647 mutex_enter(&spa_namespace_lock);
2648 spa = spa_lookup(name);
2650 spa_altroot(spa, altroot, buflen);
2654 mutex_exit(&spa_namespace_lock);
2656 spa_altroot(spa, altroot, buflen);
2661 spa_config_exit(spa, SCL_CONFIG, FTAG);
2662 spa_close(spa, FTAG);
2669 * Validate that the auxiliary device array is well formed. We must have an
2670 * array of nvlists, each which describes a valid leaf vdev. If this is an
2671 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
2672 * specified, as long as they are well-formed.
2675 spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode,
2676 spa_aux_vdev_t *sav, const char *config, uint64_t version,
2677 vdev_labeltype_t label)
2684 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
2687 * It's acceptable to have no devs specified.
2689 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0)
2696 * Make sure the pool is formatted with a version that supports this
2699 if (spa_version(spa) < version)
2703 * Set the pending device list so we correctly handle device in-use
2706 sav->sav_pending = dev;
2707 sav->sav_npending = ndev;
2709 for (i = 0; i < ndev; i++) {
2710 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0,
2714 if (!vd->vdev_ops->vdev_op_leaf) {
2721 * The L2ARC currently only supports disk devices in
2722 * kernel context. For user-level testing, we allow it.
2725 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) &&
2726 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) {
2733 if ((error = vdev_open(vd)) == 0 &&
2734 (error = vdev_label_init(vd, crtxg, label)) == 0) {
2735 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID,
2736 vd->vdev_guid) == 0);
2742 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE))
2749 sav->sav_pending = NULL;
2750 sav->sav_npending = 0;
2755 spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode)
2759 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
2761 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode,
2762 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES,
2763 VDEV_LABEL_SPARE)) != 0) {
2767 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode,
2768 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE,
2769 VDEV_LABEL_L2CACHE));
2773 spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs,
2778 if (sav->sav_config != NULL) {
2784 * Generate new dev list by concatentating with the
2787 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config,
2788 &olddevs, &oldndevs) == 0);
2790 newdevs = kmem_alloc(sizeof (void *) *
2791 (ndevs + oldndevs), KM_SLEEP);
2792 for (i = 0; i < oldndevs; i++)
2793 VERIFY(nvlist_dup(olddevs[i], &newdevs[i],
2795 for (i = 0; i < ndevs; i++)
2796 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs],
2799 VERIFY(nvlist_remove(sav->sav_config, config,
2800 DATA_TYPE_NVLIST_ARRAY) == 0);
2802 VERIFY(nvlist_add_nvlist_array(sav->sav_config,
2803 config, newdevs, ndevs + oldndevs) == 0);
2804 for (i = 0; i < oldndevs + ndevs; i++)
2805 nvlist_free(newdevs[i]);
2806 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *));
2809 * Generate a new dev list.
2811 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME,
2813 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config,
2819 * Stop and drop level 2 ARC devices
2822 spa_l2cache_drop(spa_t *spa)
2826 spa_aux_vdev_t *sav = &spa->spa_l2cache;
2828 for (i = 0; i < sav->sav_count; i++) {
2831 vd = sav->sav_vdevs[i];
2834 if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
2835 pool != 0ULL && l2arc_vdev_present(vd))
2836 l2arc_remove_vdev(vd);
2837 if (vd->vdev_isl2cache)
2838 spa_l2cache_remove(vd);
2839 vdev_clear_stats(vd);
2840 (void) vdev_close(vd);
2848 spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props,
2849 const char *history_str, nvlist_t *zplprops)
2852 char *altroot = NULL;
2857 uint64_t txg = TXG_INITIAL;
2858 nvlist_t **spares, **l2cache;
2859 uint_t nspares, nl2cache;
2860 uint64_t version, obj;
2864 * If this pool already exists, return failure.
2866 mutex_enter(&spa_namespace_lock);
2867 if (spa_lookup(pool) != NULL) {
2868 mutex_exit(&spa_namespace_lock);
2873 * Allocate a new spa_t structure.
2875 (void) nvlist_lookup_string(props,
2876 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
2877 spa = spa_add(pool, NULL, altroot);
2878 spa_activate(spa, spa_mode_global);
2880 if (props && (error = spa_prop_validate(spa, props))) {
2881 spa_deactivate(spa);
2883 mutex_exit(&spa_namespace_lock);
2887 if (nvlist_lookup_uint64(props, zpool_prop_to_name(ZPOOL_PROP_VERSION),
2889 version = SPA_VERSION;
2890 ASSERT(version <= SPA_VERSION);
2892 spa->spa_first_txg = txg;
2893 spa->spa_uberblock.ub_txg = txg - 1;
2894 spa->spa_uberblock.ub_version = version;
2895 spa->spa_ubsync = spa->spa_uberblock;
2898 * Create "The Godfather" zio to hold all async IOs
2900 spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
2901 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER);
2904 * Create the root vdev.
2906 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2908 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD);
2910 ASSERT(error != 0 || rvd != NULL);
2911 ASSERT(error != 0 || spa->spa_root_vdev == rvd);
2913 if (error == 0 && !zfs_allocatable_devs(nvroot))
2917 (error = vdev_create(rvd, txg, B_FALSE)) == 0 &&
2918 (error = spa_validate_aux(spa, nvroot, txg,
2919 VDEV_ALLOC_ADD)) == 0) {
2920 for (c = 0; c < rvd->vdev_children; c++) {
2921 vdev_metaslab_set_size(rvd->vdev_child[c]);
2922 vdev_expand(rvd->vdev_child[c], txg);
2926 spa_config_exit(spa, SCL_ALL, FTAG);
2930 spa_deactivate(spa);
2932 mutex_exit(&spa_namespace_lock);
2937 * Get the list of spares, if specified.
2939 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
2940 &spares, &nspares) == 0) {
2941 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME,
2943 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
2944 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
2945 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2946 spa_load_spares(spa);
2947 spa_config_exit(spa, SCL_ALL, FTAG);
2948 spa->spa_spares.sav_sync = B_TRUE;
2952 * Get the list of level 2 cache devices, if specified.
2954 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
2955 &l2cache, &nl2cache) == 0) {
2956 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
2957 NV_UNIQUE_NAME, KM_SLEEP) == 0);
2958 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
2959 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
2960 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2961 spa_load_l2cache(spa);
2962 spa_config_exit(spa, SCL_ALL, FTAG);
2963 spa->spa_l2cache.sav_sync = B_TRUE;
2966 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg);
2967 spa->spa_meta_objset = dp->dp_meta_objset;
2970 * Create DDTs (dedup tables).
2974 spa_update_dspace(spa);
2976 tx = dmu_tx_create_assigned(dp, txg);
2979 * Create the pool config object.
2981 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset,
2982 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE,
2983 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx);
2985 if (zap_add(spa->spa_meta_objset,
2986 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG,
2987 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) {
2988 cmn_err(CE_PANIC, "failed to add pool config");
2991 if (zap_add(spa->spa_meta_objset,
2992 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION,
2993 sizeof (uint64_t), 1, &version, tx) != 0) {
2994 cmn_err(CE_PANIC, "failed to add pool version");
2997 /* Newly created pools with the right version are always deflated. */
2998 if (version >= SPA_VERSION_RAIDZ_DEFLATE) {
2999 spa->spa_deflate = TRUE;
3000 if (zap_add(spa->spa_meta_objset,
3001 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
3002 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) {
3003 cmn_err(CE_PANIC, "failed to add deflate");
3008 * Create the deferred-free bpobj. Turn off compression
3009 * because sync-to-convergence takes longer if the blocksize
3012 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx);
3013 dmu_object_set_compress(spa->spa_meta_objset, obj,
3014 ZIO_COMPRESS_OFF, tx);
3015 if (zap_add(spa->spa_meta_objset,
3016 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ,
3017 sizeof (uint64_t), 1, &obj, tx) != 0) {
3018 cmn_err(CE_PANIC, "failed to add bpobj");
3020 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj,
3021 spa->spa_meta_objset, obj));
3024 * Create the pool's history object.
3026 if (version >= SPA_VERSION_ZPOOL_HISTORY)
3027 spa_history_create_obj(spa, tx);
3030 * Set pool properties.
3032 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS);
3033 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
3034 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE);
3035 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND);
3037 if (props != NULL) {
3038 spa_configfile_set(spa, props, B_FALSE);
3039 spa_sync_props(spa, props, tx);
3044 spa->spa_sync_on = B_TRUE;
3045 txg_sync_start(spa->spa_dsl_pool);
3048 * We explicitly wait for the first transaction to complete so that our
3049 * bean counters are appropriately updated.
3051 txg_wait_synced(spa->spa_dsl_pool, txg);
3053 spa_config_sync(spa, B_FALSE, B_TRUE);
3055 if (version >= SPA_VERSION_ZPOOL_HISTORY && history_str != NULL)
3056 (void) spa_history_log(spa, history_str, LOG_CMD_POOL_CREATE);
3057 spa_history_log_version(spa, LOG_POOL_CREATE);
3059 spa->spa_minref = refcount_count(&spa->spa_refcount);
3061 mutex_exit(&spa_namespace_lock);
3068 * Get the root pool information from the root disk, then import the root pool
3069 * during the system boot up time.
3071 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
3074 spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid)
3077 nvlist_t *nvtop, *nvroot;
3080 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0)
3084 * Add this top-level vdev to the child array.
3086 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
3088 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
3090 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0);
3093 * Put this pool's top-level vdevs into a root vdev.
3095 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3096 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
3097 VDEV_TYPE_ROOT) == 0);
3098 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0);
3099 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0);
3100 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
3104 * Replace the existing vdev_tree with the new root vdev in
3105 * this pool's configuration (remove the old, add the new).
3107 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
3108 nvlist_free(nvroot);
3113 * Walk the vdev tree and see if we can find a device with "better"
3114 * configuration. A configuration is "better" if the label on that
3115 * device has a more recent txg.
3118 spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg)
3122 for (c = 0; c < vd->vdev_children; c++)
3123 spa_alt_rootvdev(vd->vdev_child[c], avd, txg);
3125 if (vd->vdev_ops->vdev_op_leaf) {
3129 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid,
3133 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG,
3137 * Do we have a better boot device?
3139 if (label_txg > *txg) {
3148 * Import a root pool.
3150 * For x86. devpath_list will consist of devid and/or physpath name of
3151 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3152 * The GRUB "findroot" command will return the vdev we should boot.
3154 * For Sparc, devpath_list consists the physpath name of the booting device
3155 * no matter the rootpool is a single device pool or a mirrored pool.
3157 * "/pci@1f,0/ide@d/disk@0,0:a"
3160 spa_import_rootpool(char *devpath, char *devid)
3163 vdev_t *rvd, *bvd, *avd = NULL;
3164 nvlist_t *config, *nvtop;
3170 * Read the label from the boot device and generate a configuration.
3172 config = spa_generate_rootconf(devpath, devid, &guid);
3173 #if defined(_OBP) && defined(_KERNEL)
3174 if (config == NULL) {
3175 if (strstr(devpath, "/iscsi/ssd") != NULL) {
3177 get_iscsi_bootpath_phy(devpath);
3178 config = spa_generate_rootconf(devpath, devid, &guid);
3182 if (config == NULL) {
3183 cmn_err(CE_NOTE, "Can not read the pool label from '%s'",
3188 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
3190 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0);
3192 mutex_enter(&spa_namespace_lock);
3193 if ((spa = spa_lookup(pname)) != NULL) {
3195 * Remove the existing root pool from the namespace so that we
3196 * can replace it with the correct config we just read in.
3201 spa = spa_add(pname, config, NULL);
3202 spa->spa_is_root = B_TRUE;
3203 spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
3206 * Build up a vdev tree based on the boot device's label config.
3208 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
3210 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3211 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
3212 VDEV_ALLOC_ROOTPOOL);
3213 spa_config_exit(spa, SCL_ALL, FTAG);
3215 mutex_exit(&spa_namespace_lock);
3216 nvlist_free(config);
3217 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
3223 * Get the boot vdev.
3225 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) {
3226 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu",
3227 (u_longlong_t)guid);
3233 * Determine if there is a better boot device.
3236 spa_alt_rootvdev(rvd, &avd, &txg);
3238 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please "
3239 "try booting from '%s'", avd->vdev_path);
3245 * If the boot device is part of a spare vdev then ensure that
3246 * we're booting off the active spare.
3248 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops &&
3249 !bvd->vdev_isspare) {
3250 cmn_err(CE_NOTE, "The boot device is currently spared. Please "
3251 "try booting from '%s'",
3253 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path);
3259 spa_history_log_version(spa, LOG_POOL_IMPORT);
3261 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3263 spa_config_exit(spa, SCL_ALL, FTAG);
3264 mutex_exit(&spa_namespace_lock);
3266 nvlist_free(config);
3273 * Import a non-root pool into the system.
3276 spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags)
3279 char *altroot = NULL;
3280 spa_load_state_t state = SPA_LOAD_IMPORT;
3281 zpool_rewind_policy_t policy;
3282 uint64_t mode = spa_mode_global;
3283 uint64_t readonly = B_FALSE;
3286 nvlist_t **spares, **l2cache;
3287 uint_t nspares, nl2cache;
3290 * If a pool with this name exists, return failure.
3292 mutex_enter(&spa_namespace_lock);
3293 if (spa_lookup(pool) != NULL) {
3294 mutex_exit(&spa_namespace_lock);
3299 * Create and initialize the spa structure.
3301 (void) nvlist_lookup_string(props,
3302 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
3303 (void) nvlist_lookup_uint64(props,
3304 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly);
3307 spa = spa_add(pool, config, altroot);
3308 spa->spa_import_flags = flags;
3311 * Verbatim import - Take a pool and insert it into the namespace
3312 * as if it had been loaded at boot.
3314 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) {
3316 spa_configfile_set(spa, props, B_FALSE);
3318 spa_config_sync(spa, B_FALSE, B_TRUE);
3320 mutex_exit(&spa_namespace_lock);
3321 spa_history_log_version(spa, LOG_POOL_IMPORT);
3326 spa_activate(spa, mode);
3329 * Don't start async tasks until we know everything is healthy.
3331 spa_async_suspend(spa);
3333 zpool_get_rewind_policy(config, &policy);
3334 if (policy.zrp_request & ZPOOL_DO_REWIND)
3335 state = SPA_LOAD_RECOVER;
3338 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
3339 * because the user-supplied config is actually the one to trust when
3342 if (state != SPA_LOAD_RECOVER)
3343 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0;
3345 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg,
3346 policy.zrp_request);
3349 * Propagate anything learned while loading the pool and pass it
3350 * back to caller (i.e. rewind info, missing devices, etc).
3352 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO,
3353 spa->spa_load_info) == 0);
3355 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3357 * Toss any existing sparelist, as it doesn't have any validity
3358 * anymore, and conflicts with spa_has_spare().
3360 if (spa->spa_spares.sav_config) {
3361 nvlist_free(spa->spa_spares.sav_config);
3362 spa->spa_spares.sav_config = NULL;
3363 spa_load_spares(spa);
3365 if (spa->spa_l2cache.sav_config) {
3366 nvlist_free(spa->spa_l2cache.sav_config);
3367 spa->spa_l2cache.sav_config = NULL;
3368 spa_load_l2cache(spa);
3371 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
3374 error = spa_validate_aux(spa, nvroot, -1ULL,
3377 error = spa_validate_aux(spa, nvroot, -1ULL,
3378 VDEV_ALLOC_L2CACHE);
3379 spa_config_exit(spa, SCL_ALL, FTAG);
3382 spa_configfile_set(spa, props, B_FALSE);
3384 if (error != 0 || (props && spa_writeable(spa) &&
3385 (error = spa_prop_set(spa, props)))) {
3387 spa_deactivate(spa);
3389 mutex_exit(&spa_namespace_lock);
3393 spa_async_resume(spa);
3396 * Override any spares and level 2 cache devices as specified by
3397 * the user, as these may have correct device names/devids, etc.
3399 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
3400 &spares, &nspares) == 0) {
3401 if (spa->spa_spares.sav_config)
3402 VERIFY(nvlist_remove(spa->spa_spares.sav_config,
3403 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0);
3405 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config,
3406 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3407 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
3408 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
3409 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3410 spa_load_spares(spa);
3411 spa_config_exit(spa, SCL_ALL, FTAG);
3412 spa->spa_spares.sav_sync = B_TRUE;
3414 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
3415 &l2cache, &nl2cache) == 0) {
3416 if (spa->spa_l2cache.sav_config)
3417 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config,
3418 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0);
3420 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
3421 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3422 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
3423 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
3424 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3425 spa_load_l2cache(spa);
3426 spa_config_exit(spa, SCL_ALL, FTAG);
3427 spa->spa_l2cache.sav_sync = B_TRUE;
3431 * Check for any removed devices.
3433 if (spa->spa_autoreplace) {
3434 spa_aux_check_removed(&spa->spa_spares);
3435 spa_aux_check_removed(&spa->spa_l2cache);
3438 if (spa_writeable(spa)) {
3440 * Update the config cache to include the newly-imported pool.
3442 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
3446 * It's possible that the pool was expanded while it was exported.
3447 * We kick off an async task to handle this for us.
3449 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND);
3451 mutex_exit(&spa_namespace_lock);
3452 spa_history_log_version(spa, LOG_POOL_IMPORT);
3458 spa_tryimport(nvlist_t *tryconfig)
3460 nvlist_t *config = NULL;
3466 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname))
3469 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state))
3473 * Create and initialize the spa structure.
3475 mutex_enter(&spa_namespace_lock);
3476 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL);
3477 spa_activate(spa, FREAD);
3480 * Pass off the heavy lifting to spa_load().
3481 * Pass TRUE for mosconfig because the user-supplied config
3482 * is actually the one to trust when doing an import.
3484 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE);
3487 * If 'tryconfig' was at least parsable, return the current config.
3489 if (spa->spa_root_vdev != NULL) {
3490 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
3491 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME,
3493 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
3495 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP,
3496 spa->spa_uberblock.ub_timestamp) == 0);
3499 * If the bootfs property exists on this pool then we
3500 * copy it out so that external consumers can tell which
3501 * pools are bootable.
3503 if ((!error || error == EEXIST) && spa->spa_bootfs) {
3504 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
3507 * We have to play games with the name since the
3508 * pool was opened as TRYIMPORT_NAME.
3510 if (dsl_dsobj_to_dsname(spa_name(spa),
3511 spa->spa_bootfs, tmpname) == 0) {
3513 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
3515 cp = strchr(tmpname, '/');
3517 (void) strlcpy(dsname, tmpname,
3520 (void) snprintf(dsname, MAXPATHLEN,
3521 "%s/%s", poolname, ++cp);
3523 VERIFY(nvlist_add_string(config,
3524 ZPOOL_CONFIG_BOOTFS, dsname) == 0);
3525 kmem_free(dsname, MAXPATHLEN);
3527 kmem_free(tmpname, MAXPATHLEN);
3531 * Add the list of hot spares and level 2 cache devices.
3533 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3534 spa_add_spares(spa, config);
3535 spa_add_l2cache(spa, config);
3536 spa_config_exit(spa, SCL_CONFIG, FTAG);
3540 spa_deactivate(spa);
3542 mutex_exit(&spa_namespace_lock);
3548 * Pool export/destroy
3550 * The act of destroying or exporting a pool is very simple. We make sure there
3551 * is no more pending I/O and any references to the pool are gone. Then, we
3552 * update the pool state and sync all the labels to disk, removing the
3553 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
3554 * we don't sync the labels or remove the configuration cache.
3557 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig,
3558 boolean_t force, boolean_t hardforce)
3565 if (!(spa_mode_global & FWRITE))
3568 mutex_enter(&spa_namespace_lock);
3569 if ((spa = spa_lookup(pool)) == NULL) {
3570 mutex_exit(&spa_namespace_lock);
3575 * Put a hold on the pool, drop the namespace lock, stop async tasks,
3576 * reacquire the namespace lock, and see if we can export.
3578 spa_open_ref(spa, FTAG);
3579 mutex_exit(&spa_namespace_lock);
3580 spa_async_suspend(spa);
3581 mutex_enter(&spa_namespace_lock);
3582 spa_close(spa, FTAG);
3585 * The pool will be in core if it's openable,
3586 * in which case we can modify its state.
3588 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) {
3590 * Objsets may be open only because they're dirty, so we
3591 * have to force it to sync before checking spa_refcnt.
3593 txg_wait_synced(spa->spa_dsl_pool, 0);
3596 * A pool cannot be exported or destroyed if there are active
3597 * references. If we are resetting a pool, allow references by
3598 * fault injection handlers.
3600 if (!spa_refcount_zero(spa) ||
3601 (spa->spa_inject_ref != 0 &&
3602 new_state != POOL_STATE_UNINITIALIZED)) {
3603 spa_async_resume(spa);
3604 mutex_exit(&spa_namespace_lock);
3609 * A pool cannot be exported if it has an active shared spare.
3610 * This is to prevent other pools stealing the active spare
3611 * from an exported pool. At user's own will, such pool can
3612 * be forcedly exported.
3614 if (!force && new_state == POOL_STATE_EXPORTED &&
3615 spa_has_active_shared_spare(spa)) {
3616 spa_async_resume(spa);
3617 mutex_exit(&spa_namespace_lock);
3622 * We want this to be reflected on every label,
3623 * so mark them all dirty. spa_unload() will do the
3624 * final sync that pushes these changes out.
3626 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) {
3627 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3628 spa->spa_state = new_state;
3629 spa->spa_final_txg = spa_last_synced_txg(spa) +
3631 vdev_config_dirty(spa->spa_root_vdev);
3632 spa_config_exit(spa, SCL_ALL, FTAG);
3636 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY);
3638 if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
3640 spa_deactivate(spa);
3643 if (oldconfig && spa->spa_config)
3644 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0);
3646 if (new_state != POOL_STATE_UNINITIALIZED) {
3648 spa_config_sync(spa, B_TRUE, B_TRUE);
3651 mutex_exit(&spa_namespace_lock);
3657 * Destroy a storage pool.
3660 spa_destroy(char *pool)
3662 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL,
3667 * Export a storage pool.
3670 spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
3671 boolean_t hardforce)
3673 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig,
3678 * Similar to spa_export(), this unloads the spa_t without actually removing it
3679 * from the namespace in any way.
3682 spa_reset(char *pool)
3684 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL,
3689 * ==========================================================================
3690 * Device manipulation
3691 * ==========================================================================
3695 * Add a device to a storage pool.
3698 spa_vdev_add(spa_t *spa, nvlist_t *nvroot)
3702 vdev_t *rvd = spa->spa_root_vdev;
3704 nvlist_t **spares, **l2cache;
3705 uint_t nspares, nl2cache;
3708 ASSERT(spa_writeable(spa));
3710 txg = spa_vdev_enter(spa);
3712 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0,
3713 VDEV_ALLOC_ADD)) != 0)
3714 return (spa_vdev_exit(spa, NULL, txg, error));
3716 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */
3718 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares,
3722 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache,
3726 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0)
3727 return (spa_vdev_exit(spa, vd, txg, EINVAL));
3729 if (vd->vdev_children != 0 &&
3730 (error = vdev_create(vd, txg, B_FALSE)) != 0)
3731 return (spa_vdev_exit(spa, vd, txg, error));
3734 * We must validate the spares and l2cache devices after checking the
3735 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
3737 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0)
3738 return (spa_vdev_exit(spa, vd, txg, error));
3741 * Transfer each new top-level vdev from vd to rvd.
3743 for (c = 0; c < vd->vdev_children; c++) {
3746 * Set the vdev id to the first hole, if one exists.
3748 for (id = 0; id < rvd->vdev_children; id++) {
3749 if (rvd->vdev_child[id]->vdev_ishole) {
3750 vdev_free(rvd->vdev_child[id]);
3754 tvd = vd->vdev_child[c];
3755 vdev_remove_child(vd, tvd);
3757 vdev_add_child(rvd, tvd);
3758 vdev_config_dirty(tvd);
3762 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares,
3763 ZPOOL_CONFIG_SPARES);
3764 spa_load_spares(spa);
3765 spa->spa_spares.sav_sync = B_TRUE;
3768 if (nl2cache != 0) {
3769 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache,
3770 ZPOOL_CONFIG_L2CACHE);
3771 spa_load_l2cache(spa);
3772 spa->spa_l2cache.sav_sync = B_TRUE;
3776 * We have to be careful when adding new vdevs to an existing pool.
3777 * If other threads start allocating from these vdevs before we
3778 * sync the config cache, and we lose power, then upon reboot we may
3779 * fail to open the pool because there are DVAs that the config cache
3780 * can't translate. Therefore, we first add the vdevs without
3781 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
3782 * and then let spa_config_update() initialize the new metaslabs.
3784 * spa_load() checks for added-but-not-initialized vdevs, so that
3785 * if we lose power at any point in this sequence, the remaining
3786 * steps will be completed the next time we load the pool.
3788 (void) spa_vdev_exit(spa, vd, txg, 0);
3790 mutex_enter(&spa_namespace_lock);
3791 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
3792 mutex_exit(&spa_namespace_lock);
3798 * Attach a device to a mirror. The arguments are the path to any device
3799 * in the mirror, and the nvroot for the new device. If the path specifies
3800 * a device that is not mirrored, we automatically insert the mirror vdev.
3802 * If 'replacing' is specified, the new device is intended to replace the
3803 * existing device; in this case the two devices are made into their own
3804 * mirror using the 'replacing' vdev, which is functionally identical to
3805 * the mirror vdev (it actually reuses all the same ops) but has a few
3806 * extra rules: you can't attach to it after it's been created, and upon
3807 * completion of resilvering, the first disk (the one being replaced)
3808 * is automatically detached.
3811 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing)
3813 uint64_t txg, dtl_max_txg;
3814 vdev_t *rvd = spa->spa_root_vdev;
3815 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd;
3817 char *oldvdpath, *newvdpath;
3821 ASSERT(spa_writeable(spa));
3823 txg = spa_vdev_enter(spa);
3825 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE);
3828 return (spa_vdev_exit(spa, NULL, txg, ENODEV));
3830 if (!oldvd->vdev_ops->vdev_op_leaf)
3831 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
3833 pvd = oldvd->vdev_parent;
3835 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0,
3836 VDEV_ALLOC_ADD)) != 0)
3837 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
3839 if (newrootvd->vdev_children != 1)
3840 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
3842 newvd = newrootvd->vdev_child[0];
3844 if (!newvd->vdev_ops->vdev_op_leaf)
3845 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
3847 if ((error = vdev_create(newrootvd, txg, replacing)) != 0)
3848 return (spa_vdev_exit(spa, newrootvd, txg, error));
3851 * Spares can't replace logs
3853 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare)
3854 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
3858 * For attach, the only allowable parent is a mirror or the root
3861 if (pvd->vdev_ops != &vdev_mirror_ops &&
3862 pvd->vdev_ops != &vdev_root_ops)
3863 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
3865 pvops = &vdev_mirror_ops;
3868 * Active hot spares can only be replaced by inactive hot
3871 if (pvd->vdev_ops == &vdev_spare_ops &&
3872 oldvd->vdev_isspare &&
3873 !spa_has_spare(spa, newvd->vdev_guid))
3874 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
3877 * If the source is a hot spare, and the parent isn't already a
3878 * spare, then we want to create a new hot spare. Otherwise, we
3879 * want to create a replacing vdev. The user is not allowed to
3880 * attach to a spared vdev child unless the 'isspare' state is
3881 * the same (spare replaces spare, non-spare replaces
3884 if (pvd->vdev_ops == &vdev_replacing_ops &&
3885 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) {
3886 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
3887 } else if (pvd->vdev_ops == &vdev_spare_ops &&
3888 newvd->vdev_isspare != oldvd->vdev_isspare) {
3889 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
3892 if (newvd->vdev_isspare)
3893 pvops = &vdev_spare_ops;
3895 pvops = &vdev_replacing_ops;
3899 * Make sure the new device is big enough.
3901 if (newvd->vdev_asize < vdev_get_min_asize(oldvd))
3902 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW));
3905 * The new device cannot have a higher alignment requirement
3906 * than the top-level vdev.
3908 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift)
3909 return (spa_vdev_exit(spa, newrootvd, txg, EDOM));
3912 * If this is an in-place replacement, update oldvd's path and devid
3913 * to make it distinguishable from newvd, and unopenable from now on.
3915 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) {
3916 spa_strfree(oldvd->vdev_path);
3917 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5,
3919 (void) sprintf(oldvd->vdev_path, "%s/%s",
3920 newvd->vdev_path, "old");
3921 if (oldvd->vdev_devid != NULL) {
3922 spa_strfree(oldvd->vdev_devid);
3923 oldvd->vdev_devid = NULL;
3927 /* mark the device being resilvered */
3928 newvd->vdev_resilvering = B_TRUE;
3931 * If the parent is not a mirror, or if we're replacing, insert the new
3932 * mirror/replacing/spare vdev above oldvd.
3934 if (pvd->vdev_ops != pvops)
3935 pvd = vdev_add_parent(oldvd, pvops);
3937 ASSERT(pvd->vdev_top->vdev_parent == rvd);
3938 ASSERT(pvd->vdev_ops == pvops);
3939 ASSERT(oldvd->vdev_parent == pvd);
3942 * Extract the new device from its root and add it to pvd.
3944 vdev_remove_child(newrootvd, newvd);
3945 newvd->vdev_id = pvd->vdev_children;
3946 newvd->vdev_crtxg = oldvd->vdev_crtxg;
3947 vdev_add_child(pvd, newvd);
3949 tvd = newvd->vdev_top;
3950 ASSERT(pvd->vdev_top == tvd);
3951 ASSERT(tvd->vdev_parent == rvd);
3953 vdev_config_dirty(tvd);
3956 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
3957 * for any dmu_sync-ed blocks. It will propagate upward when
3958 * spa_vdev_exit() calls vdev_dtl_reassess().
3960 dtl_max_txg = txg + TXG_CONCURRENT_STATES;
3962 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL,
3963 dtl_max_txg - TXG_INITIAL);
3965 if (newvd->vdev_isspare) {
3966 spa_spare_activate(newvd);
3967 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE);
3970 oldvdpath = spa_strdup(oldvd->vdev_path);
3971 newvdpath = spa_strdup(newvd->vdev_path);
3972 newvd_isspare = newvd->vdev_isspare;
3975 * Mark newvd's DTL dirty in this txg.
3977 vdev_dirty(tvd, VDD_DTL, newvd, txg);
3980 * Restart the resilver
3982 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg);
3987 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0);
3989 spa_history_log_internal(LOG_POOL_VDEV_ATTACH, spa, NULL,
3990 "%s vdev=%s %s vdev=%s",
3991 replacing && newvd_isspare ? "spare in" :
3992 replacing ? "replace" : "attach", newvdpath,
3993 replacing ? "for" : "to", oldvdpath);
3995 spa_strfree(oldvdpath);
3996 spa_strfree(newvdpath);
3998 if (spa->spa_bootfs)
3999 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH);
4005 * Detach a device from a mirror or replacing vdev.
4006 * If 'replace_done' is specified, only detach if the parent
4007 * is a replacing vdev.
4010 spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done)
4014 vdev_t *rvd = spa->spa_root_vdev;
4015 vdev_t *vd, *pvd, *cvd, *tvd;
4016 boolean_t unspare = B_FALSE;
4017 uint64_t unspare_guid;
4021 ASSERT(spa_writeable(spa));
4023 txg = spa_vdev_enter(spa);
4025 vd = spa_lookup_by_guid(spa, guid, B_FALSE);
4028 return (spa_vdev_exit(spa, NULL, txg, ENODEV));
4030 if (!vd->vdev_ops->vdev_op_leaf)
4031 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4033 pvd = vd->vdev_parent;
4036 * If the parent/child relationship is not as expected, don't do it.
4037 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4038 * vdev that's replacing B with C. The user's intent in replacing
4039 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4040 * the replace by detaching C, the expected behavior is to end up
4041 * M(A,B). But suppose that right after deciding to detach C,
4042 * the replacement of B completes. We would have M(A,C), and then
4043 * ask to detach C, which would leave us with just A -- not what
4044 * the user wanted. To prevent this, we make sure that the
4045 * parent/child relationship hasn't changed -- in this example,
4046 * that C's parent is still the replacing vdev R.
4048 if (pvd->vdev_guid != pguid && pguid != 0)
4049 return (spa_vdev_exit(spa, NULL, txg, EBUSY));
4052 * Only 'replacing' or 'spare' vdevs can be replaced.
4054 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops &&
4055 pvd->vdev_ops != &vdev_spare_ops)
4056 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4058 ASSERT(pvd->vdev_ops != &vdev_spare_ops ||
4059 spa_version(spa) >= SPA_VERSION_SPARES);
4062 * Only mirror, replacing, and spare vdevs support detach.
4064 if (pvd->vdev_ops != &vdev_replacing_ops &&
4065 pvd->vdev_ops != &vdev_mirror_ops &&
4066 pvd->vdev_ops != &vdev_spare_ops)
4067 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4070 * If this device has the only valid copy of some data,
4071 * we cannot safely detach it.
4073 if (vdev_dtl_required(vd))
4074 return (spa_vdev_exit(spa, NULL, txg, EBUSY));
4076 ASSERT(pvd->vdev_children >= 2);
4079 * If we are detaching the second disk from a replacing vdev, then
4080 * check to see if we changed the original vdev's path to have "/old"
4081 * at the end in spa_vdev_attach(). If so, undo that change now.
4083 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 &&
4084 vd->vdev_path != NULL) {
4085 size_t len = strlen(vd->vdev_path);
4087 for (c = 0; c < pvd->vdev_children; c++) {
4088 cvd = pvd->vdev_child[c];
4090 if (cvd == vd || cvd->vdev_path == NULL)
4093 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 &&
4094 strcmp(cvd->vdev_path + len, "/old") == 0) {
4095 spa_strfree(cvd->vdev_path);
4096 cvd->vdev_path = spa_strdup(vd->vdev_path);
4103 * If we are detaching the original disk from a spare, then it implies
4104 * that the spare should become a real disk, and be removed from the
4105 * active spare list for the pool.
4107 if (pvd->vdev_ops == &vdev_spare_ops &&
4109 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare)
4113 * Erase the disk labels so the disk can be used for other things.
4114 * This must be done after all other error cases are handled,
4115 * but before we disembowel vd (so we can still do I/O to it).
4116 * But if we can't do it, don't treat the error as fatal --
4117 * it may be that the unwritability of the disk is the reason
4118 * it's being detached!
4120 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
4123 * Remove vd from its parent and compact the parent's children.
4125 vdev_remove_child(pvd, vd);
4126 vdev_compact_children(pvd);
4129 * Remember one of the remaining children so we can get tvd below.
4131 cvd = pvd->vdev_child[pvd->vdev_children - 1];
4134 * If we need to remove the remaining child from the list of hot spares,
4135 * do it now, marking the vdev as no longer a spare in the process.
4136 * We must do this before vdev_remove_parent(), because that can
4137 * change the GUID if it creates a new toplevel GUID. For a similar
4138 * reason, we must remove the spare now, in the same txg as the detach;
4139 * otherwise someone could attach a new sibling, change the GUID, and
4140 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
4143 ASSERT(cvd->vdev_isspare);
4144 spa_spare_remove(cvd);
4145 unspare_guid = cvd->vdev_guid;
4146 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE);
4147 cvd->vdev_unspare = B_TRUE;
4151 * If the parent mirror/replacing vdev only has one child,
4152 * the parent is no longer needed. Remove it from the tree.
4154 if (pvd->vdev_children == 1) {
4155 if (pvd->vdev_ops == &vdev_spare_ops)
4156 cvd->vdev_unspare = B_FALSE;
4157 vdev_remove_parent(cvd);
4158 cvd->vdev_resilvering = B_FALSE;
4163 * We don't set tvd until now because the parent we just removed
4164 * may have been the previous top-level vdev.
4166 tvd = cvd->vdev_top;
4167 ASSERT(tvd->vdev_parent == rvd);
4170 * Reevaluate the parent vdev state.
4172 vdev_propagate_state(cvd);
4175 * If the 'autoexpand' property is set on the pool then automatically
4176 * try to expand the size of the pool. For example if the device we
4177 * just detached was smaller than the others, it may be possible to
4178 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
4179 * first so that we can obtain the updated sizes of the leaf vdevs.
4181 if (spa->spa_autoexpand) {
4183 vdev_expand(tvd, txg);
4186 vdev_config_dirty(tvd);
4189 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
4190 * vd->vdev_detached is set and free vd's DTL object in syncing context.
4191 * But first make sure we're not on any *other* txg's DTL list, to
4192 * prevent vd from being accessed after it's freed.
4194 vdpath = spa_strdup(vd->vdev_path);
4195 for (t = 0; t < TXG_SIZE; t++)
4196 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t);
4197 vd->vdev_detached = B_TRUE;
4198 vdev_dirty(tvd, VDD_DTL, vd, txg);
4200 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE);
4202 /* hang on to the spa before we release the lock */
4203 spa_open_ref(spa, FTAG);
4205 error = spa_vdev_exit(spa, vd, txg, 0);
4207 spa_history_log_internal(LOG_POOL_VDEV_DETACH, spa, NULL,
4209 spa_strfree(vdpath);
4212 * If this was the removal of the original device in a hot spare vdev,
4213 * then we want to go through and remove the device from the hot spare
4214 * list of every other pool.
4217 spa_t *altspa = NULL;
4219 mutex_enter(&spa_namespace_lock);
4220 while ((altspa = spa_next(altspa)) != NULL) {
4221 if (altspa->spa_state != POOL_STATE_ACTIVE ||
4225 spa_open_ref(altspa, FTAG);
4226 mutex_exit(&spa_namespace_lock);
4227 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE);
4228 mutex_enter(&spa_namespace_lock);
4229 spa_close(altspa, FTAG);
4231 mutex_exit(&spa_namespace_lock);
4233 /* search the rest of the vdevs for spares to remove */
4234 spa_vdev_resilver_done(spa);
4237 /* all done with the spa; OK to release */
4238 mutex_enter(&spa_namespace_lock);
4239 spa_close(spa, FTAG);
4240 mutex_exit(&spa_namespace_lock);
4246 * Split a set of devices from their mirrors, and create a new pool from them.
4249 spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
4250 nvlist_t *props, boolean_t exp)
4253 uint64_t txg, *glist;
4255 uint_t c, children, lastlog;
4256 nvlist_t **child, *nvl, *tmp;
4258 char *altroot = NULL;
4259 vdev_t *rvd, **vml = NULL; /* vdev modify list */
4260 boolean_t activate_slog;
4262 ASSERT(spa_writeable(spa));
4264 txg = spa_vdev_enter(spa);
4266 /* clear the log and flush everything up to now */
4267 activate_slog = spa_passivate_log(spa);
4268 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
4269 error = spa_offline_log(spa);
4270 txg = spa_vdev_config_enter(spa);
4273 spa_activate_log(spa);
4276 return (spa_vdev_exit(spa, NULL, txg, error));
4278 /* check new spa name before going any further */
4279 if (spa_lookup(newname) != NULL)
4280 return (spa_vdev_exit(spa, NULL, txg, EEXIST));
4283 * scan through all the children to ensure they're all mirrors
4285 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 ||
4286 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child,
4288 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
4290 /* first, check to ensure we've got the right child count */
4291 rvd = spa->spa_root_vdev;
4293 for (c = 0; c < rvd->vdev_children; c++) {
4294 vdev_t *vd = rvd->vdev_child[c];
4296 /* don't count the holes & logs as children */
4297 if (vd->vdev_islog || vd->vdev_ishole) {
4305 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children))
4306 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
4308 /* next, ensure no spare or cache devices are part of the split */
4309 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 ||
4310 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0)
4311 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
4313 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP);
4314 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP);
4316 /* then, loop over each vdev and validate it */
4317 for (c = 0; c < children; c++) {
4318 uint64_t is_hole = 0;
4320 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE,
4324 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole ||
4325 spa->spa_root_vdev->vdev_child[c]->vdev_islog) {
4333 /* which disk is going to be split? */
4334 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID,
4340 /* look it up in the spa */
4341 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE);
4342 if (vml[c] == NULL) {
4347 /* make sure there's nothing stopping the split */
4348 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops ||
4349 vml[c]->vdev_islog ||
4350 vml[c]->vdev_ishole ||
4351 vml[c]->vdev_isspare ||
4352 vml[c]->vdev_isl2cache ||
4353 !vdev_writeable(vml[c]) ||
4354 vml[c]->vdev_children != 0 ||
4355 vml[c]->vdev_state != VDEV_STATE_HEALTHY ||
4356 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) {
4361 if (vdev_dtl_required(vml[c])) {
4366 /* we need certain info from the top level */
4367 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY,
4368 vml[c]->vdev_top->vdev_ms_array) == 0);
4369 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT,
4370 vml[c]->vdev_top->vdev_ms_shift) == 0);
4371 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE,
4372 vml[c]->vdev_top->vdev_asize) == 0);
4373 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT,
4374 vml[c]->vdev_top->vdev_ashift) == 0);
4378 kmem_free(vml, children * sizeof (vdev_t *));
4379 kmem_free(glist, children * sizeof (uint64_t));
4380 return (spa_vdev_exit(spa, NULL, txg, error));
4383 /* stop writers from using the disks */
4384 for (c = 0; c < children; c++) {
4386 vml[c]->vdev_offline = B_TRUE;
4388 vdev_reopen(spa->spa_root_vdev);
4391 * Temporarily record the splitting vdevs in the spa config. This
4392 * will disappear once the config is regenerated.
4394 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
4395 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST,
4396 glist, children) == 0);
4397 kmem_free(glist, children * sizeof (uint64_t));
4399 mutex_enter(&spa->spa_props_lock);
4400 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT,
4402 mutex_exit(&spa->spa_props_lock);
4403 spa->spa_config_splitting = nvl;
4404 vdev_config_dirty(spa->spa_root_vdev);
4406 /* configure and create the new pool */
4407 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0);
4408 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
4409 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0);
4410 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION,
4411 spa_version(spa)) == 0);
4412 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG,
4413 spa->spa_config_txg) == 0);
4414 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID,
4415 spa_generate_guid(NULL)) == 0);
4416 (void) nvlist_lookup_string(props,
4417 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
4419 /* add the new pool to the namespace */
4420 newspa = spa_add(newname, config, altroot);
4421 newspa->spa_config_txg = spa->spa_config_txg;
4422 spa_set_log_state(newspa, SPA_LOG_CLEAR);
4424 /* release the spa config lock, retaining the namespace lock */
4425 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
4427 if (zio_injection_enabled)
4428 zio_handle_panic_injection(spa, FTAG, 1);
4430 spa_activate(newspa, spa_mode_global);
4431 spa_async_suspend(newspa);
4433 /* create the new pool from the disks of the original pool */
4434 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE);
4438 /* if that worked, generate a real config for the new pool */
4439 if (newspa->spa_root_vdev != NULL) {
4440 VERIFY(nvlist_alloc(&newspa->spa_config_splitting,
4441 NV_UNIQUE_NAME, KM_SLEEP) == 0);
4442 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting,
4443 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0);
4444 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL,
4449 if (props != NULL) {
4450 spa_configfile_set(newspa, props, B_FALSE);
4451 error = spa_prop_set(newspa, props);
4456 /* flush everything */
4457 txg = spa_vdev_config_enter(newspa);
4458 vdev_config_dirty(newspa->spa_root_vdev);
4459 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG);
4461 if (zio_injection_enabled)
4462 zio_handle_panic_injection(spa, FTAG, 2);
4464 spa_async_resume(newspa);
4466 /* finally, update the original pool's config */
4467 txg = spa_vdev_config_enter(spa);
4468 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
4469 error = dmu_tx_assign(tx, TXG_WAIT);
4472 for (c = 0; c < children; c++) {
4473 if (vml[c] != NULL) {
4476 spa_history_log_internal(LOG_POOL_VDEV_DETACH,
4482 vdev_config_dirty(spa->spa_root_vdev);
4483 spa->spa_config_splitting = NULL;
4487 (void) spa_vdev_exit(spa, NULL, txg, 0);
4489 if (zio_injection_enabled)
4490 zio_handle_panic_injection(spa, FTAG, 3);
4492 /* split is complete; log a history record */
4493 spa_history_log_internal(LOG_POOL_SPLIT, newspa, NULL,
4494 "split new pool %s from pool %s", newname, spa_name(spa));
4496 kmem_free(vml, children * sizeof (vdev_t *));
4498 /* if we're not going to mount the filesystems in userland, export */
4500 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL,
4507 spa_deactivate(newspa);
4510 txg = spa_vdev_config_enter(spa);
4512 /* re-online all offlined disks */
4513 for (c = 0; c < children; c++) {
4515 vml[c]->vdev_offline = B_FALSE;
4517 vdev_reopen(spa->spa_root_vdev);
4519 nvlist_free(spa->spa_config_splitting);
4520 spa->spa_config_splitting = NULL;
4521 (void) spa_vdev_exit(spa, NULL, txg, error);
4523 kmem_free(vml, children * sizeof (vdev_t *));
4528 spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid)
4532 for (i = 0; i < count; i++) {
4535 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID,
4538 if (guid == target_guid)
4546 spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count,
4547 nvlist_t *dev_to_remove)
4549 nvlist_t **newdev = NULL;
4553 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP);
4555 for (i = 0, j = 0; i < count; i++) {
4556 if (dev[i] == dev_to_remove)
4558 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0);
4561 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0);
4562 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0);
4564 for (i = 0; i < count - 1; i++)
4565 nvlist_free(newdev[i]);
4568 kmem_free(newdev, (count - 1) * sizeof (void *));
4572 * Evacuate the device.
4575 spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd)
4580 ASSERT(MUTEX_HELD(&spa_namespace_lock));
4581 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
4582 ASSERT(vd == vd->vdev_top);
4585 * Evacuate the device. We don't hold the config lock as writer
4586 * since we need to do I/O but we do keep the
4587 * spa_namespace_lock held. Once this completes the device
4588 * should no longer have any blocks allocated on it.
4590 if (vd->vdev_islog) {
4591 if (vd->vdev_stat.vs_alloc != 0)
4592 error = spa_offline_log(spa);
4601 * The evacuation succeeded. Remove any remaining MOS metadata
4602 * associated with this vdev, and wait for these changes to sync.
4604 ASSERT3U(vd->vdev_stat.vs_alloc, ==, 0);
4605 txg = spa_vdev_config_enter(spa);
4606 vd->vdev_removing = B_TRUE;
4607 vdev_dirty(vd, 0, NULL, txg);
4608 vdev_config_dirty(vd);
4609 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
4615 * Complete the removal by cleaning up the namespace.
4618 spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd)
4620 vdev_t *rvd = spa->spa_root_vdev;
4621 uint64_t id = vd->vdev_id;
4622 boolean_t last_vdev = (id == (rvd->vdev_children - 1));
4624 ASSERT(MUTEX_HELD(&spa_namespace_lock));
4625 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
4626 ASSERT(vd == vd->vdev_top);
4629 * Only remove any devices which are empty.
4631 if (vd->vdev_stat.vs_alloc != 0)
4634 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
4636 if (list_link_active(&vd->vdev_state_dirty_node))
4637 vdev_state_clean(vd);
4638 if (list_link_active(&vd->vdev_config_dirty_node))
4639 vdev_config_clean(vd);
4644 vdev_compact_children(rvd);
4646 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops);
4647 vdev_add_child(rvd, vd);
4649 vdev_config_dirty(rvd);
4652 * Reassess the health of our root vdev.
4658 * Remove a device from the pool -
4660 * Removing a device from the vdev namespace requires several steps
4661 * and can take a significant amount of time. As a result we use
4662 * the spa_vdev_config_[enter/exit] functions which allow us to
4663 * grab and release the spa_config_lock while still holding the namespace
4664 * lock. During each step the configuration is synced out.
4668 * Remove a device from the pool. Currently, this supports removing only hot
4669 * spares, slogs, and level 2 ARC devices.
4672 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare)
4675 metaslab_group_t *mg;
4676 nvlist_t **spares, **l2cache, *nv;
4678 uint_t nspares, nl2cache;
4680 boolean_t locked = MUTEX_HELD(&spa_namespace_lock);
4682 ASSERT(spa_writeable(spa));
4685 txg = spa_vdev_enter(spa);
4687 vd = spa_lookup_by_guid(spa, guid, B_FALSE);
4689 if (spa->spa_spares.sav_vdevs != NULL &&
4690 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
4691 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 &&
4692 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) {
4694 * Only remove the hot spare if it's not currently in use
4697 if (vd == NULL || unspare) {
4698 spa_vdev_remove_aux(spa->spa_spares.sav_config,
4699 ZPOOL_CONFIG_SPARES, spares, nspares, nv);
4700 spa_load_spares(spa);
4701 spa->spa_spares.sav_sync = B_TRUE;
4705 } else if (spa->spa_l2cache.sav_vdevs != NULL &&
4706 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
4707 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 &&
4708 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) {
4710 * Cache devices can always be removed.
4712 spa_vdev_remove_aux(spa->spa_l2cache.sav_config,
4713 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv);
4714 spa_load_l2cache(spa);
4715 spa->spa_l2cache.sav_sync = B_TRUE;
4716 } else if (vd != NULL && vd->vdev_islog) {
4718 ASSERT(vd == vd->vdev_top);
4721 * XXX - Once we have bp-rewrite this should
4722 * become the common case.
4728 * Stop allocating from this vdev.
4730 metaslab_group_passivate(mg);
4733 * Wait for the youngest allocations and frees to sync,
4734 * and then wait for the deferral of those frees to finish.
4736 spa_vdev_config_exit(spa, NULL,
4737 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG);
4740 * Attempt to evacuate the vdev.
4742 error = spa_vdev_remove_evacuate(spa, vd);
4744 txg = spa_vdev_config_enter(spa);
4747 * If we couldn't evacuate the vdev, unwind.
4750 metaslab_group_activate(mg);
4751 return (spa_vdev_exit(spa, NULL, txg, error));
4755 * Clean up the vdev namespace.
4757 spa_vdev_remove_from_namespace(spa, vd);
4759 } else if (vd != NULL) {
4761 * Normal vdevs cannot be removed (yet).
4766 * There is no vdev of any kind with the specified guid.
4772 return (spa_vdev_exit(spa, NULL, txg, error));
4778 * Find any device that's done replacing, or a vdev marked 'unspare' that's
4779 * current spared, so we can detach it.
4782 spa_vdev_resilver_done_hunt(vdev_t *vd)
4784 vdev_t *newvd, *oldvd;
4787 for (c = 0; c < vd->vdev_children; c++) {
4788 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]);
4794 * Check for a completed replacement. We always consider the first
4795 * vdev in the list to be the oldest vdev, and the last one to be
4796 * the newest (see spa_vdev_attach() for how that works). In
4797 * the case where the newest vdev is faulted, we will not automatically
4798 * remove it after a resilver completes. This is OK as it will require
4799 * user intervention to determine which disk the admin wishes to keep.
4801 if (vd->vdev_ops == &vdev_replacing_ops) {
4802 ASSERT(vd->vdev_children > 1);
4804 newvd = vd->vdev_child[vd->vdev_children - 1];
4805 oldvd = vd->vdev_child[0];
4807 if (vdev_dtl_empty(newvd, DTL_MISSING) &&
4808 vdev_dtl_empty(newvd, DTL_OUTAGE) &&
4809 !vdev_dtl_required(oldvd))
4814 * Check for a completed resilver with the 'unspare' flag set.
4816 if (vd->vdev_ops == &vdev_spare_ops) {
4817 vdev_t *first = vd->vdev_child[0];
4818 vdev_t *last = vd->vdev_child[vd->vdev_children - 1];
4820 if (last->vdev_unspare) {
4823 } else if (first->vdev_unspare) {
4830 if (oldvd != NULL &&
4831 vdev_dtl_empty(newvd, DTL_MISSING) &&
4832 vdev_dtl_empty(newvd, DTL_OUTAGE) &&
4833 !vdev_dtl_required(oldvd))
4837 * If there are more than two spares attached to a disk,
4838 * and those spares are not required, then we want to
4839 * attempt to free them up now so that they can be used
4840 * by other pools. Once we're back down to a single
4841 * disk+spare, we stop removing them.
4843 if (vd->vdev_children > 2) {
4844 newvd = vd->vdev_child[1];
4846 if (newvd->vdev_isspare && last->vdev_isspare &&
4847 vdev_dtl_empty(last, DTL_MISSING) &&
4848 vdev_dtl_empty(last, DTL_OUTAGE) &&
4849 !vdev_dtl_required(newvd))
4858 spa_vdev_resilver_done(spa_t *spa)
4860 vdev_t *vd, *pvd, *ppvd;
4861 uint64_t guid, sguid, pguid, ppguid;
4863 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4865 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) {
4866 pvd = vd->vdev_parent;
4867 ppvd = pvd->vdev_parent;
4868 guid = vd->vdev_guid;
4869 pguid = pvd->vdev_guid;
4870 ppguid = ppvd->vdev_guid;
4873 * If we have just finished replacing a hot spared device, then
4874 * we need to detach the parent's first child (the original hot
4877 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 &&
4878 ppvd->vdev_children == 2) {
4879 ASSERT(pvd->vdev_ops == &vdev_replacing_ops);
4880 sguid = ppvd->vdev_child[1]->vdev_guid;
4882 spa_config_exit(spa, SCL_ALL, FTAG);
4883 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0)
4885 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0)
4887 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4890 spa_config_exit(spa, SCL_ALL, FTAG);
4894 * Update the stored path or FRU for this vdev.
4897 spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value,
4901 boolean_t sync = B_FALSE;
4903 ASSERT(spa_writeable(spa));
4905 spa_vdev_state_enter(spa, SCL_ALL);
4907 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
4908 return (spa_vdev_state_exit(spa, NULL, ENOENT));
4910 if (!vd->vdev_ops->vdev_op_leaf)
4911 return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
4914 if (strcmp(value, vd->vdev_path) != 0) {
4915 spa_strfree(vd->vdev_path);
4916 vd->vdev_path = spa_strdup(value);
4920 if (vd->vdev_fru == NULL) {
4921 vd->vdev_fru = spa_strdup(value);
4923 } else if (strcmp(value, vd->vdev_fru) != 0) {
4924 spa_strfree(vd->vdev_fru);
4925 vd->vdev_fru = spa_strdup(value);
4930 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0));
4934 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath)
4936 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE));
4940 spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru)
4942 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE));
4946 * ==========================================================================
4948 * ==========================================================================
4952 spa_scan_stop(spa_t *spa)
4954 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
4955 if (dsl_scan_resilvering(spa->spa_dsl_pool))
4957 return (dsl_scan_cancel(spa->spa_dsl_pool));
4961 spa_scan(spa_t *spa, pool_scan_func_t func)
4963 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
4965 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE)
4969 * If a resilver was requested, but there is no DTL on a
4970 * writeable leaf device, we have nothing to do.
4972 if (func == POOL_SCAN_RESILVER &&
4973 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) {
4974 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE);
4978 return (dsl_scan(spa->spa_dsl_pool, func));
4982 * ==========================================================================
4983 * SPA async task processing
4984 * ==========================================================================
4988 spa_async_remove(spa_t *spa, vdev_t *vd)
4992 if (vd->vdev_remove_wanted) {
4993 vd->vdev_remove_wanted = B_FALSE;
4994 vd->vdev_delayed_close = B_FALSE;
4995 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE);
4998 * We want to clear the stats, but we don't want to do a full
4999 * vdev_clear() as that will cause us to throw away
5000 * degraded/faulted state as well as attempt to reopen the
5001 * device, all of which is a waste.
5003 vd->vdev_stat.vs_read_errors = 0;
5004 vd->vdev_stat.vs_write_errors = 0;
5005 vd->vdev_stat.vs_checksum_errors = 0;
5007 vdev_state_dirty(vd->vdev_top);
5010 for (c = 0; c < vd->vdev_children; c++)
5011 spa_async_remove(spa, vd->vdev_child[c]);
5015 spa_async_probe(spa_t *spa, vdev_t *vd)
5019 if (vd->vdev_probe_wanted) {
5020 vd->vdev_probe_wanted = B_FALSE;
5021 vdev_reopen(vd); /* vdev_open() does the actual probe */
5024 for (c = 0; c < vd->vdev_children; c++)
5025 spa_async_probe(spa, vd->vdev_child[c]);
5029 spa_async_autoexpand(spa_t *spa, vdev_t *vd)
5036 if (!spa->spa_autoexpand)
5039 for (c = 0; c < vd->vdev_children; c++) {
5040 vdev_t *cvd = vd->vdev_child[c];
5041 spa_async_autoexpand(spa, cvd);
5044 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL)
5047 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
5048 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath);
5050 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0);
5051 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0);
5053 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS,
5054 ESC_DEV_DLE, attr, &eid, DDI_SLEEP);
5057 kmem_free(physpath, MAXPATHLEN);
5061 spa_async_thread(spa_t *spa)
5065 ASSERT(spa->spa_sync_on);
5067 mutex_enter(&spa->spa_async_lock);
5068 tasks = spa->spa_async_tasks;
5069 spa->spa_async_tasks = 0;
5070 mutex_exit(&spa->spa_async_lock);
5073 * See if the config needs to be updated.
5075 if (tasks & SPA_ASYNC_CONFIG_UPDATE) {
5076 uint64_t old_space, new_space;
5078 mutex_enter(&spa_namespace_lock);
5079 old_space = metaslab_class_get_space(spa_normal_class(spa));
5080 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
5081 new_space = metaslab_class_get_space(spa_normal_class(spa));
5082 mutex_exit(&spa_namespace_lock);
5085 * If the pool grew as a result of the config update,
5086 * then log an internal history event.
5088 if (new_space != old_space) {
5089 spa_history_log_internal(LOG_POOL_VDEV_ONLINE,
5091 "pool '%s' size: %llu(+%llu)",
5092 spa_name(spa), new_space, new_space - old_space);
5097 * See if any devices need to be marked REMOVED.
5099 if (tasks & SPA_ASYNC_REMOVE) {
5100 spa_vdev_state_enter(spa, SCL_NONE);
5101 spa_async_remove(spa, spa->spa_root_vdev);
5102 for (i = 0; i < spa->spa_l2cache.sav_count; i++)
5103 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]);
5104 for (i = 0; i < spa->spa_spares.sav_count; i++)
5105 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]);
5106 (void) spa_vdev_state_exit(spa, NULL, 0);
5109 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) {
5110 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
5111 spa_async_autoexpand(spa, spa->spa_root_vdev);
5112 spa_config_exit(spa, SCL_CONFIG, FTAG);
5116 * See if any devices need to be probed.
5118 if (tasks & SPA_ASYNC_PROBE) {
5119 spa_vdev_state_enter(spa, SCL_NONE);
5120 spa_async_probe(spa, spa->spa_root_vdev);
5121 (void) spa_vdev_state_exit(spa, NULL, 0);
5125 * If any devices are done replacing, detach them.
5127 if (tasks & SPA_ASYNC_RESILVER_DONE)
5128 spa_vdev_resilver_done(spa);
5131 * Kick off a resilver.
5133 if (tasks & SPA_ASYNC_RESILVER)
5134 dsl_resilver_restart(spa->spa_dsl_pool, 0);
5137 * Let the world know that we're done.
5139 mutex_enter(&spa->spa_async_lock);
5140 spa->spa_async_thread = NULL;
5141 cv_broadcast(&spa->spa_async_cv);
5142 mutex_exit(&spa->spa_async_lock);
5147 spa_async_suspend(spa_t *spa)
5149 mutex_enter(&spa->spa_async_lock);
5150 spa->spa_async_suspended++;
5151 while (spa->spa_async_thread != NULL)
5152 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock);
5153 mutex_exit(&spa->spa_async_lock);
5157 spa_async_resume(spa_t *spa)
5159 mutex_enter(&spa->spa_async_lock);
5160 ASSERT(spa->spa_async_suspended != 0);
5161 spa->spa_async_suspended--;
5162 mutex_exit(&spa->spa_async_lock);
5166 spa_async_dispatch(spa_t *spa)
5168 mutex_enter(&spa->spa_async_lock);
5169 if (spa->spa_async_tasks && !spa->spa_async_suspended &&
5170 spa->spa_async_thread == NULL &&
5171 rootdir != NULL && !vn_is_readonly(rootdir))
5172 spa->spa_async_thread = thread_create(NULL, 0,
5173 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri);
5174 mutex_exit(&spa->spa_async_lock);
5178 spa_async_request(spa_t *spa, int task)
5180 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task);
5181 mutex_enter(&spa->spa_async_lock);
5182 spa->spa_async_tasks |= task;
5183 mutex_exit(&spa->spa_async_lock);
5187 * ==========================================================================
5188 * SPA syncing routines
5189 * ==========================================================================
5193 bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
5196 bpobj_enqueue(bpo, bp, tx);
5201 spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
5205 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp,
5211 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx)
5213 char *packed = NULL;
5218 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0);
5221 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
5222 * information. This avoids the dbuf_will_dirty() path and
5223 * saves us a pre-read to get data we don't actually care about.
5225 bufsize = P2ROUNDUP(nvsize, SPA_CONFIG_BLOCKSIZE);
5226 packed = kmem_alloc(bufsize, KM_SLEEP);
5228 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR,
5230 bzero(packed + nvsize, bufsize - nvsize);
5232 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx);
5234 kmem_free(packed, bufsize);
5236 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db));
5237 dmu_buf_will_dirty(db, tx);
5238 *(uint64_t *)db->db_data = nvsize;
5239 dmu_buf_rele(db, FTAG);
5243 spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx,
5244 const char *config, const char *entry)
5254 * Update the MOS nvlist describing the list of available devices.
5255 * spa_validate_aux() will have already made sure this nvlist is
5256 * valid and the vdevs are labeled appropriately.
5258 if (sav->sav_object == 0) {
5259 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset,
5260 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE,
5261 sizeof (uint64_t), tx);
5262 VERIFY(zap_update(spa->spa_meta_objset,
5263 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1,
5264 &sav->sav_object, tx) == 0);
5267 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
5268 if (sav->sav_count == 0) {
5269 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0);
5271 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
5272 for (i = 0; i < sav->sav_count; i++)
5273 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i],
5274 B_FALSE, VDEV_CONFIG_L2CACHE);
5275 VERIFY(nvlist_add_nvlist_array(nvroot, config, list,
5276 sav->sav_count) == 0);
5277 for (i = 0; i < sav->sav_count; i++)
5278 nvlist_free(list[i]);
5279 kmem_free(list, sav->sav_count * sizeof (void *));
5282 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx);
5283 nvlist_free(nvroot);
5285 sav->sav_sync = B_FALSE;
5289 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx)
5293 if (list_is_empty(&spa->spa_config_dirty_list))
5296 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
5298 config = spa_config_generate(spa, spa->spa_root_vdev,
5299 dmu_tx_get_txg(tx), B_FALSE);
5301 spa_config_exit(spa, SCL_STATE, FTAG);
5303 if (spa->spa_config_syncing)
5304 nvlist_free(spa->spa_config_syncing);
5305 spa->spa_config_syncing = config;
5307 spa_sync_nvlist(spa, spa->spa_config_object, config, tx);
5311 * Set zpool properties.
5314 spa_sync_props(void *arg1, void *arg2, dmu_tx_t *tx)
5317 objset_t *mos = spa->spa_meta_objset;
5318 nvlist_t *nvp = arg2;
5323 const char *propname;
5324 zprop_type_t proptype;
5326 mutex_enter(&spa->spa_props_lock);
5329 while ((elem = nvlist_next_nvpair(nvp, elem))) {
5330 switch (prop = zpool_name_to_prop(nvpair_name(elem))) {
5331 case ZPOOL_PROP_VERSION:
5333 * Only set version for non-zpool-creation cases
5334 * (set/import). spa_create() needs special care
5335 * for version setting.
5337 if (tx->tx_txg != TXG_INITIAL) {
5338 VERIFY(nvpair_value_uint64(elem,
5340 ASSERT(intval <= SPA_VERSION);
5341 ASSERT(intval >= spa_version(spa));
5342 spa->spa_uberblock.ub_version = intval;
5343 vdev_config_dirty(spa->spa_root_vdev);
5347 case ZPOOL_PROP_ALTROOT:
5349 * 'altroot' is a non-persistent property. It should
5350 * have been set temporarily at creation or import time.
5352 ASSERT(spa->spa_root != NULL);
5355 case ZPOOL_PROP_READONLY:
5356 case ZPOOL_PROP_CACHEFILE:
5358 * 'readonly' and 'cachefile' are also non-persisitent
5364 * Set pool property values in the poolprops mos object.
5366 if (spa->spa_pool_props_object == 0) {
5367 VERIFY((spa->spa_pool_props_object =
5368 zap_create(mos, DMU_OT_POOL_PROPS,
5369 DMU_OT_NONE, 0, tx)) > 0);
5371 VERIFY(zap_update(mos,
5372 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS,
5373 8, 1, &spa->spa_pool_props_object, tx)
5377 /* normalize the property name */
5378 propname = zpool_prop_to_name(prop);
5379 proptype = zpool_prop_get_type(prop);
5381 if (nvpair_type(elem) == DATA_TYPE_STRING) {
5382 ASSERT(proptype == PROP_TYPE_STRING);
5383 VERIFY(nvpair_value_string(elem, &strval) == 0);
5384 VERIFY(zap_update(mos,
5385 spa->spa_pool_props_object, propname,
5386 1, strlen(strval) + 1, strval, tx) == 0);
5388 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) {
5389 VERIFY(nvpair_value_uint64(elem, &intval) == 0);
5391 if (proptype == PROP_TYPE_INDEX) {
5393 VERIFY(zpool_prop_index_to_string(
5394 prop, intval, &unused) == 0);
5396 VERIFY(zap_update(mos,
5397 spa->spa_pool_props_object, propname,
5398 8, 1, &intval, tx) == 0);
5400 ASSERT(0); /* not allowed */
5404 case ZPOOL_PROP_DELEGATION:
5405 spa->spa_delegation = intval;
5407 case ZPOOL_PROP_BOOTFS:
5408 spa->spa_bootfs = intval;
5410 case ZPOOL_PROP_FAILUREMODE:
5411 spa->spa_failmode = intval;
5413 case ZPOOL_PROP_AUTOEXPAND:
5414 spa->spa_autoexpand = intval;
5415 if (tx->tx_txg != TXG_INITIAL)
5416 spa_async_request(spa,
5417 SPA_ASYNC_AUTOEXPAND);
5419 case ZPOOL_PROP_DEDUPDITTO:
5420 spa->spa_dedup_ditto = intval;
5427 /* log internal history if this is not a zpool create */
5428 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY &&
5429 tx->tx_txg != TXG_INITIAL) {
5430 spa_history_log_internal(LOG_POOL_PROPSET,
5431 spa, tx, "%s %lld %s",
5432 nvpair_name(elem), intval, spa_name(spa));
5436 mutex_exit(&spa->spa_props_lock);
5440 * Perform one-time upgrade on-disk changes. spa_version() does not
5441 * reflect the new version this txg, so there must be no changes this
5442 * txg to anything that the upgrade code depends on after it executes.
5443 * Therefore this must be called after dsl_pool_sync() does the sync
5447 spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx)
5449 dsl_pool_t *dp = spa->spa_dsl_pool;
5451 ASSERT(spa->spa_sync_pass == 1);
5453 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN &&
5454 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) {
5455 dsl_pool_create_origin(dp, tx);
5457 /* Keeping the origin open increases spa_minref */
5458 spa->spa_minref += 3;
5461 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES &&
5462 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) {
5463 dsl_pool_upgrade_clones(dp, tx);
5466 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES &&
5467 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) {
5468 dsl_pool_upgrade_dir_clones(dp, tx);
5470 /* Keeping the freedir open increases spa_minref */
5471 spa->spa_minref += 3;
5476 * Sync the specified transaction group. New blocks may be dirtied as
5477 * part of the process, so we iterate until it converges.
5480 spa_sync(spa_t *spa, uint64_t txg)
5482 dsl_pool_t *dp = spa->spa_dsl_pool;
5483 objset_t *mos = spa->spa_meta_objset;
5484 bpobj_t *defer_bpo = &spa->spa_deferred_bpobj;
5485 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK];
5486 vdev_t *rvd = spa->spa_root_vdev;
5492 VERIFY(spa_writeable(spa));
5495 * Lock out configuration changes.
5497 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
5499 spa->spa_syncing_txg = txg;
5500 spa->spa_sync_pass = 0;
5503 * If there are any pending vdev state changes, convert them
5504 * into config changes that go out with this transaction group.
5506 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
5507 while (list_head(&spa->spa_state_dirty_list) != NULL) {
5509 * We need the write lock here because, for aux vdevs,
5510 * calling vdev_config_dirty() modifies sav_config.
5511 * This is ugly and will become unnecessary when we
5512 * eliminate the aux vdev wart by integrating all vdevs
5513 * into the root vdev tree.
5515 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
5516 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER);
5517 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) {
5518 vdev_state_clean(vd);
5519 vdev_config_dirty(vd);
5521 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
5522 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER);
5524 spa_config_exit(spa, SCL_STATE, FTAG);
5526 tx = dmu_tx_create_assigned(dp, txg);
5529 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
5530 * set spa_deflate if we have no raid-z vdevs.
5532 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE &&
5533 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) {
5536 for (i = 0; i < rvd->vdev_children; i++) {
5537 vd = rvd->vdev_child[i];
5538 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE)
5541 if (i == rvd->vdev_children) {
5542 spa->spa_deflate = TRUE;
5543 VERIFY(0 == zap_add(spa->spa_meta_objset,
5544 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
5545 sizeof (uint64_t), 1, &spa->spa_deflate, tx));
5550 * If anything has changed in this txg, or if someone is waiting
5551 * for this txg to sync (eg, spa_vdev_remove()), push the
5552 * deferred frees from the previous txg. If not, leave them
5553 * alone so that we don't generate work on an otherwise idle
5556 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) ||
5557 !txg_list_empty(&dp->dp_dirty_dirs, txg) ||
5558 !txg_list_empty(&dp->dp_sync_tasks, txg) ||
5559 ((dsl_scan_active(dp->dp_scan) ||
5560 txg_sync_waiting(dp)) && !spa_shutting_down(spa))) {
5561 zio_t *zio = zio_root(spa, NULL, NULL, 0);
5562 VERIFY3U(bpobj_iterate(defer_bpo,
5563 spa_free_sync_cb, zio, tx), ==, 0);
5564 VERIFY3U(zio_wait(zio), ==, 0);
5568 * Iterate to convergence.
5571 int pass = ++spa->spa_sync_pass;
5573 spa_sync_config_object(spa, tx);
5574 spa_sync_aux_dev(spa, &spa->spa_spares, tx,
5575 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES);
5576 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx,
5577 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE);
5578 spa_errlog_sync(spa, txg);
5579 dsl_pool_sync(dp, txg);
5581 if (pass <= SYNC_PASS_DEFERRED_FREE) {
5582 zio_t *zio = zio_root(spa, NULL, NULL, 0);
5583 bplist_iterate(free_bpl, spa_free_sync_cb,
5585 VERIFY(zio_wait(zio) == 0);
5587 bplist_iterate(free_bpl, bpobj_enqueue_cb,
5592 dsl_scan_sync(dp, tx);
5594 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg))
5598 spa_sync_upgrades(spa, tx);
5600 } while (dmu_objset_is_dirty(mos, txg));
5603 * Rewrite the vdev configuration (which includes the uberblock)
5604 * to commit the transaction group.
5606 * If there are no dirty vdevs, we sync the uberblock to a few
5607 * random top-level vdevs that are known to be visible in the
5608 * config cache (see spa_vdev_add() for a complete description).
5609 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
5613 * We hold SCL_STATE to prevent vdev open/close/etc.
5614 * while we're attempting to write the vdev labels.
5616 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
5618 if (list_is_empty(&spa->spa_config_dirty_list)) {
5619 vdev_t *svd[SPA_DVAS_PER_BP];
5621 int children = rvd->vdev_children;
5622 int c0 = spa_get_random(children);
5624 for (c = 0; c < children; c++) {
5625 vd = rvd->vdev_child[(c0 + c) % children];
5626 if (vd->vdev_ms_array == 0 || vd->vdev_islog)
5628 svd[svdcount++] = vd;
5629 if (svdcount == SPA_DVAS_PER_BP)
5632 error = vdev_config_sync(svd, svdcount, txg, B_FALSE);
5634 error = vdev_config_sync(svd, svdcount, txg,
5637 error = vdev_config_sync(rvd->vdev_child,
5638 rvd->vdev_children, txg, B_FALSE);
5640 error = vdev_config_sync(rvd->vdev_child,
5641 rvd->vdev_children, txg, B_TRUE);
5644 spa_config_exit(spa, SCL_STATE, FTAG);
5648 zio_suspend(spa, NULL);
5649 zio_resume_wait(spa);
5654 * Clear the dirty config list.
5656 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL)
5657 vdev_config_clean(vd);
5660 * Now that the new config has synced transactionally,
5661 * let it become visible to the config cache.
5663 if (spa->spa_config_syncing != NULL) {
5664 spa_config_set(spa, spa->spa_config_syncing);
5665 spa->spa_config_txg = txg;
5666 spa->spa_config_syncing = NULL;
5669 spa->spa_ubsync = spa->spa_uberblock;
5671 dsl_pool_sync_done(dp, txg);
5674 * Update usable space statistics.
5676 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg)))
5677 vdev_sync_done(vd, txg);
5679 spa_update_dspace(spa);
5682 * It had better be the case that we didn't dirty anything
5683 * since vdev_config_sync().
5685 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg));
5686 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg));
5687 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg));
5689 spa->spa_sync_pass = 0;
5691 spa_config_exit(spa, SCL_CONFIG, FTAG);
5693 spa_handle_ignored_writes(spa);
5696 * If any async tasks have been requested, kick them off.
5698 spa_async_dispatch(spa);
5702 * Sync all pools. We don't want to hold the namespace lock across these
5703 * operations, so we take a reference on the spa_t and drop the lock during the
5707 spa_sync_allpools(void)
5710 mutex_enter(&spa_namespace_lock);
5711 while ((spa = spa_next(spa)) != NULL) {
5712 if (spa_state(spa) != POOL_STATE_ACTIVE ||
5713 !spa_writeable(spa) || spa_suspended(spa))
5715 spa_open_ref(spa, FTAG);
5716 mutex_exit(&spa_namespace_lock);
5717 txg_wait_synced(spa_get_dsl(spa), 0);
5718 mutex_enter(&spa_namespace_lock);
5719 spa_close(spa, FTAG);
5721 mutex_exit(&spa_namespace_lock);
5725 * ==========================================================================
5726 * Miscellaneous routines
5727 * ==========================================================================
5731 * Remove all pools in the system.
5739 * Remove all cached state. All pools should be closed now,
5740 * so every spa in the AVL tree should be unreferenced.
5742 mutex_enter(&spa_namespace_lock);
5743 while ((spa = spa_next(NULL)) != NULL) {
5745 * Stop async tasks. The async thread may need to detach
5746 * a device that's been replaced, which requires grabbing
5747 * spa_namespace_lock, so we must drop it here.
5749 spa_open_ref(spa, FTAG);
5750 mutex_exit(&spa_namespace_lock);
5751 spa_async_suspend(spa);
5752 mutex_enter(&spa_namespace_lock);
5753 spa_close(spa, FTAG);
5755 if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
5757 spa_deactivate(spa);
5761 mutex_exit(&spa_namespace_lock);
5765 spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux)
5770 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL)
5774 for (i = 0; i < spa->spa_l2cache.sav_count; i++) {
5775 vd = spa->spa_l2cache.sav_vdevs[i];
5776 if (vd->vdev_guid == guid)
5780 for (i = 0; i < spa->spa_spares.sav_count; i++) {
5781 vd = spa->spa_spares.sav_vdevs[i];
5782 if (vd->vdev_guid == guid)
5791 spa_upgrade(spa_t *spa, uint64_t version)
5793 ASSERT(spa_writeable(spa));
5795 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
5798 * This should only be called for a non-faulted pool, and since a
5799 * future version would result in an unopenable pool, this shouldn't be
5802 ASSERT(spa->spa_uberblock.ub_version <= SPA_VERSION);
5803 ASSERT(version >= spa->spa_uberblock.ub_version);
5805 spa->spa_uberblock.ub_version = version;
5806 vdev_config_dirty(spa->spa_root_vdev);
5808 spa_config_exit(spa, SCL_ALL, FTAG);
5810 txg_wait_synced(spa_get_dsl(spa), 0);
5814 spa_has_spare(spa_t *spa, uint64_t guid)
5818 spa_aux_vdev_t *sav = &spa->spa_spares;
5820 for (i = 0; i < sav->sav_count; i++)
5821 if (sav->sav_vdevs[i]->vdev_guid == guid)
5824 for (i = 0; i < sav->sav_npending; i++) {
5825 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID,
5826 &spareguid) == 0 && spareguid == guid)
5834 * Check if a pool has an active shared spare device.
5835 * Note: reference count of an active spare is 2, as a spare and as a replace
5838 spa_has_active_shared_spare(spa_t *spa)
5842 spa_aux_vdev_t *sav = &spa->spa_spares;
5844 for (i = 0; i < sav->sav_count; i++) {
5845 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool,
5846 &refcnt) && pool != 0ULL && pool == spa_guid(spa) &&
5855 * Post a sysevent corresponding to the given event. The 'name' must be one of
5856 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
5857 * filled in from the spa and (optionally) the vdev. This doesn't do anything
5858 * in the userland libzpool, as we don't want consumers to misinterpret ztest
5859 * or zdb as real changes.
5862 spa_event_notify(spa_t *spa, vdev_t *vd, const char *name)
5866 sysevent_attr_list_t *attr = NULL;
5867 sysevent_value_t value;
5870 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs",
5873 value.value_type = SE_DATA_TYPE_STRING;
5874 value.value.sv_string = spa_name(spa);
5875 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0)
5878 value.value_type = SE_DATA_TYPE_UINT64;
5879 value.value.sv_uint64 = spa_guid(spa);
5880 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0)
5884 value.value_type = SE_DATA_TYPE_UINT64;
5885 value.value.sv_uint64 = vd->vdev_guid;
5886 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value,
5890 if (vd->vdev_path) {
5891 value.value_type = SE_DATA_TYPE_STRING;
5892 value.value.sv_string = vd->vdev_path;
5893 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH,
5894 &value, SE_SLEEP) != 0)
5899 if (sysevent_attach_attributes(ev, attr) != 0)
5903 (void) log_sysevent(ev, SE_SLEEP, &eid);
5907 sysevent_free_attr(attr);