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 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
28 * This file contains all the routines used when modifying on-disk SPA state.
29 * This includes opening, importing, destroying, exporting a pool, and syncing a
33 #include <sys/zfs_context.h>
34 #include <sys/fm/fs/zfs.h>
35 #include <sys/spa_impl.h>
37 #include <sys/zio_checksum.h>
38 #include <sys/zio_compress.h>
40 #include <sys/dmu_tx.h>
43 #include <sys/vdev_impl.h>
44 #include <sys/metaslab.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/sunddi.h>
61 #include <sys/spa_boot.h>
62 #include <sys/zfs_ioctl.h>
69 #include "zfs_comutil.h"
72 zti_mode_fixed, /* value is # of threads (min 1) */
73 zti_mode_online_percent, /* value is % of online CPUs */
74 zti_mode_tune, /* fill from zio_taskq_tune_* */
78 #define ZTI_THREAD_FIX(n) { zti_mode_fixed, (n) }
79 #define ZTI_THREAD_PCT(n) { zti_mode_online_percent, (n) }
80 #define ZTI_THREAD_TUNE { zti_mode_tune, 0 }
82 #define ZTI_THREAD_ONE ZTI_THREAD_FIX(1)
84 typedef struct zio_taskq_info {
87 enum zti_modes zti_mode;
89 } zti_nthreads[ZIO_TASKQ_TYPES];
92 static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = {
96 const zio_taskq_info_t zio_taskqs[ZIO_TYPES] = {
98 { "spa_zio_null", { ZTI_THREAD_ONE, ZTI_THREAD_ONE } },
99 { "spa_zio_read", { ZTI_THREAD_FIX(8), ZTI_THREAD_TUNE } },
100 { "spa_zio_write", { ZTI_THREAD_TUNE, ZTI_THREAD_FIX(8) } },
101 { "spa_zio_free", { ZTI_THREAD_ONE, ZTI_THREAD_ONE } },
102 { "spa_zio_claim", { ZTI_THREAD_ONE, ZTI_THREAD_ONE } },
103 { "spa_zio_ioctl", { ZTI_THREAD_ONE, ZTI_THREAD_ONE } },
106 enum zti_modes zio_taskq_tune_mode = zti_mode_online_percent;
107 uint_t zio_taskq_tune_value = 80; /* #threads = 80% of # online CPUs */
109 static void spa_sync_props(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx);
110 static boolean_t spa_has_active_shared_spare(spa_t *spa);
113 * ==========================================================================
114 * SPA properties routines
115 * ==========================================================================
119 * Add a (source=src, propname=propval) list to an nvlist.
122 spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval,
123 uint64_t intval, zprop_source_t src)
125 const char *propname = zpool_prop_to_name(prop);
128 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
129 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0);
132 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0);
134 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0);
136 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0);
137 nvlist_free(propval);
141 * Get property values from the spa configuration.
144 spa_prop_get_config(spa_t *spa, nvlist_t **nvp)
148 uint64_t cap, version;
149 zprop_source_t src = ZPROP_SRC_NONE;
150 spa_config_dirent_t *dp;
152 ASSERT(MUTEX_HELD(&spa->spa_props_lock));
154 if (spa->spa_root_vdev != NULL) {
155 size = spa_get_space(spa);
156 used = spa_get_alloc(spa);
157 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src);
158 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src);
159 spa_prop_add_list(*nvp, ZPOOL_PROP_USED, NULL, used, src);
160 spa_prop_add_list(*nvp, ZPOOL_PROP_AVAILABLE, NULL,
163 cap = (size == 0) ? 0 : (used * 100 / size);
164 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src);
166 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL,
167 spa->spa_root_vdev->vdev_state, src);
169 version = spa_version(spa);
170 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION))
171 src = ZPROP_SRC_DEFAULT;
173 src = ZPROP_SRC_LOCAL;
174 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src);
177 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src);
179 if (spa->spa_root != NULL)
180 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root,
183 if ((dp = list_head(&spa->spa_config_list)) != NULL) {
184 if (dp->scd_path == NULL) {
185 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
186 "none", 0, ZPROP_SRC_LOCAL);
187 } else if (strcmp(dp->scd_path, spa_config_path) != 0) {
188 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
189 dp->scd_path, 0, ZPROP_SRC_LOCAL);
195 * Get zpool property values.
198 spa_prop_get(spa_t *spa, nvlist_t **nvp)
202 objset_t *mos = spa->spa_meta_objset;
205 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
207 mutex_enter(&spa->spa_props_lock);
210 * Get properties from the spa config.
212 spa_prop_get_config(spa, nvp);
214 /* If no pool property object, no more prop to get. */
215 if (spa->spa_pool_props_object == 0) {
216 mutex_exit(&spa->spa_props_lock);
221 * Get properties from the MOS pool property object.
223 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object);
224 (err = zap_cursor_retrieve(&zc, &za)) == 0;
225 zap_cursor_advance(&zc)) {
228 zprop_source_t src = ZPROP_SRC_DEFAULT;
231 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL)
234 switch (za.za_integer_length) {
236 /* integer property */
237 if (za.za_first_integer !=
238 zpool_prop_default_numeric(prop))
239 src = ZPROP_SRC_LOCAL;
241 if (prop == ZPOOL_PROP_BOOTFS) {
243 dsl_dataset_t *ds = NULL;
245 dp = spa_get_dsl(spa);
246 rw_enter(&dp->dp_config_rwlock, RW_READER);
247 if (err = dsl_dataset_hold_obj(dp,
248 za.za_first_integer, FTAG, &ds)) {
249 rw_exit(&dp->dp_config_rwlock);
254 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1,
256 dsl_dataset_name(ds, strval);
257 dsl_dataset_rele(ds, FTAG);
258 rw_exit(&dp->dp_config_rwlock);
261 intval = za.za_first_integer;
264 spa_prop_add_list(*nvp, prop, strval, intval, src);
268 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1);
273 /* string property */
274 strval = kmem_alloc(za.za_num_integers, KM_SLEEP);
275 err = zap_lookup(mos, spa->spa_pool_props_object,
276 za.za_name, 1, za.za_num_integers, strval);
278 kmem_free(strval, za.za_num_integers);
281 spa_prop_add_list(*nvp, prop, strval, 0, src);
282 kmem_free(strval, za.za_num_integers);
289 zap_cursor_fini(&zc);
290 mutex_exit(&spa->spa_props_lock);
292 if (err && err != ENOENT) {
302 * Validate the given pool properties nvlist and modify the list
303 * for the property values to be set.
306 spa_prop_validate(spa_t *spa, nvlist_t *props)
309 int error = 0, reset_bootfs = 0;
313 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
315 char *propname, *strval;
320 propname = nvpair_name(elem);
322 if ((prop = zpool_name_to_prop(propname)) == ZPROP_INVAL)
326 case ZPOOL_PROP_VERSION:
327 error = nvpair_value_uint64(elem, &intval);
329 (intval < spa_version(spa) || intval > SPA_VERSION))
333 case ZPOOL_PROP_DELEGATION:
334 case ZPOOL_PROP_AUTOREPLACE:
335 case ZPOOL_PROP_LISTSNAPS:
336 case ZPOOL_PROP_AUTOEXPAND:
337 error = nvpair_value_uint64(elem, &intval);
338 if (!error && intval > 1)
342 case ZPOOL_PROP_BOOTFS:
344 * If the pool version is less than SPA_VERSION_BOOTFS,
345 * or the pool is still being created (version == 0),
346 * the bootfs property cannot be set.
348 if (spa_version(spa) < SPA_VERSION_BOOTFS) {
354 * Make sure the vdev config is bootable
356 if (!vdev_is_bootable(spa->spa_root_vdev)) {
363 error = nvpair_value_string(elem, &strval);
368 if (strval == NULL || strval[0] == '\0') {
369 objnum = zpool_prop_default_numeric(
374 if (error = dmu_objset_open(strval, DMU_OST_ZFS,
375 DS_MODE_USER | DS_MODE_READONLY, &os))
378 /* We don't support gzip bootable datasets */
379 if ((error = dsl_prop_get_integer(strval,
380 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
381 &compress, NULL)) == 0 &&
382 !BOOTFS_COMPRESS_VALID(compress)) {
385 objnum = dmu_objset_id(os);
387 dmu_objset_close(os);
391 case ZPOOL_PROP_FAILUREMODE:
392 error = nvpair_value_uint64(elem, &intval);
393 if (!error && (intval < ZIO_FAILURE_MODE_WAIT ||
394 intval > ZIO_FAILURE_MODE_PANIC))
398 * This is a special case which only occurs when
399 * the pool has completely failed. This allows
400 * the user to change the in-core failmode property
401 * without syncing it out to disk (I/Os might
402 * currently be blocked). We do this by returning
403 * EIO to the caller (spa_prop_set) to trick it
404 * into thinking we encountered a property validation
407 if (!error && spa_suspended(spa)) {
408 spa->spa_failmode = intval;
413 case ZPOOL_PROP_CACHEFILE:
414 if ((error = nvpair_value_string(elem, &strval)) != 0)
417 if (strval[0] == '\0')
420 if (strcmp(strval, "none") == 0)
423 if (strval[0] != '/') {
428 slash = strrchr(strval, '/');
429 ASSERT(slash != NULL);
431 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 ||
432 strcmp(slash, "/..") == 0)
441 if (!error && reset_bootfs) {
442 error = nvlist_remove(props,
443 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING);
446 error = nvlist_add_uint64(props,
447 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum);
455 spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync)
458 spa_config_dirent_t *dp;
460 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE),
464 dp = kmem_alloc(sizeof (spa_config_dirent_t),
467 if (cachefile[0] == '\0')
468 dp->scd_path = spa_strdup(spa_config_path);
469 else if (strcmp(cachefile, "none") == 0)
472 dp->scd_path = spa_strdup(cachefile);
474 list_insert_head(&spa->spa_config_list, dp);
476 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
480 spa_prop_set(spa_t *spa, nvlist_t *nvp)
484 boolean_t need_sync = B_FALSE;
487 if ((error = spa_prop_validate(spa, nvp)) != 0)
491 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) {
492 if ((prop = zpool_name_to_prop(
493 nvpair_name(elem))) == ZPROP_INVAL)
496 if (prop == ZPOOL_PROP_CACHEFILE || prop == ZPOOL_PROP_ALTROOT)
504 return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props,
511 * If the bootfs property value is dsobj, clear it.
514 spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx)
516 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) {
517 VERIFY(zap_remove(spa->spa_meta_objset,
518 spa->spa_pool_props_object,
519 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0);
525 * ==========================================================================
526 * SPA state manipulation (open/create/destroy/import/export)
527 * ==========================================================================
531 spa_error_entry_compare(const void *a, const void *b)
533 spa_error_entry_t *sa = (spa_error_entry_t *)a;
534 spa_error_entry_t *sb = (spa_error_entry_t *)b;
537 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark,
538 sizeof (zbookmark_t));
549 * Utility function which retrieves copies of the current logs and
550 * re-initializes them in the process.
553 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub)
555 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock));
557 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t));
558 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t));
560 avl_create(&spa->spa_errlist_scrub,
561 spa_error_entry_compare, sizeof (spa_error_entry_t),
562 offsetof(spa_error_entry_t, se_avl));
563 avl_create(&spa->spa_errlist_last,
564 spa_error_entry_compare, sizeof (spa_error_entry_t),
565 offsetof(spa_error_entry_t, se_avl));
569 * Activate an uninitialized pool.
572 spa_activate(spa_t *spa, int mode)
574 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED);
576 spa->spa_state = POOL_STATE_ACTIVE;
577 spa->spa_mode = mode;
579 spa->spa_normal_class = metaslab_class_create(zfs_metaslab_ops);
580 spa->spa_log_class = metaslab_class_create(zfs_metaslab_ops);
582 for (int t = 0; t < ZIO_TYPES; t++) {
583 const zio_taskq_info_t *ztip = &zio_taskqs[t];
584 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) {
585 enum zti_modes mode = ztip->zti_nthreads[q].zti_mode;
586 uint_t value = ztip->zti_nthreads[q].zti_value;
589 (void) snprintf(name, sizeof (name),
590 "%s_%s", ztip->zti_name, zio_taskq_types[q]);
592 if (mode == zti_mode_tune) {
593 mode = zio_taskq_tune_mode;
594 value = zio_taskq_tune_value;
595 if (mode == zti_mode_tune)
596 mode = zti_mode_online_percent;
601 ASSERT3U(value, >=, 1);
602 value = MAX(value, 1);
604 spa->spa_zio_taskq[t][q] = taskq_create(name,
605 value, maxclsyspri, 50, INT_MAX,
609 case zti_mode_online_percent:
610 spa->spa_zio_taskq[t][q] = taskq_create(name,
611 value, maxclsyspri, 50, INT_MAX,
612 TASKQ_PREPOPULATE | TASKQ_THREADS_CPU_PCT);
617 panic("unrecognized mode for "
618 "zio_taskqs[%u]->zti_nthreads[%u] (%u:%u) "
626 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t),
627 offsetof(vdev_t, vdev_config_dirty_node));
628 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t),
629 offsetof(vdev_t, vdev_state_dirty_node));
631 txg_list_create(&spa->spa_vdev_txg_list,
632 offsetof(struct vdev, vdev_txg_node));
634 avl_create(&spa->spa_errlist_scrub,
635 spa_error_entry_compare, sizeof (spa_error_entry_t),
636 offsetof(spa_error_entry_t, se_avl));
637 avl_create(&spa->spa_errlist_last,
638 spa_error_entry_compare, sizeof (spa_error_entry_t),
639 offsetof(spa_error_entry_t, se_avl));
643 * Opposite of spa_activate().
646 spa_deactivate(spa_t *spa)
648 ASSERT(spa->spa_sync_on == B_FALSE);
649 ASSERT(spa->spa_dsl_pool == NULL);
650 ASSERT(spa->spa_root_vdev == NULL);
651 ASSERT(spa->spa_async_zio_root == NULL);
652 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED);
654 txg_list_destroy(&spa->spa_vdev_txg_list);
656 list_destroy(&spa->spa_config_dirty_list);
657 list_destroy(&spa->spa_state_dirty_list);
659 for (int t = 0; t < ZIO_TYPES; t++) {
660 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) {
661 taskq_destroy(spa->spa_zio_taskq[t][q]);
662 spa->spa_zio_taskq[t][q] = NULL;
666 metaslab_class_destroy(spa->spa_normal_class);
667 spa->spa_normal_class = NULL;
669 metaslab_class_destroy(spa->spa_log_class);
670 spa->spa_log_class = NULL;
673 * If this was part of an import or the open otherwise failed, we may
674 * still have errors left in the queues. Empty them just in case.
676 spa_errlog_drain(spa);
678 avl_destroy(&spa->spa_errlist_scrub);
679 avl_destroy(&spa->spa_errlist_last);
681 spa->spa_state = POOL_STATE_UNINITIALIZED;
685 * Verify a pool configuration, and construct the vdev tree appropriately. This
686 * will create all the necessary vdevs in the appropriate layout, with each vdev
687 * in the CLOSED state. This will prep the pool before open/creation/import.
688 * All vdev validation is done by the vdev_alloc() routine.
691 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent,
692 uint_t id, int atype)
698 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0)
701 if ((*vdp)->vdev_ops->vdev_op_leaf)
704 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
716 for (int c = 0; c < children; c++) {
718 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c,
726 ASSERT(*vdp != NULL);
732 * Opposite of spa_load().
735 spa_unload(spa_t *spa)
739 ASSERT(MUTEX_HELD(&spa_namespace_lock));
744 spa_async_suspend(spa);
749 if (spa->spa_sync_on) {
750 txg_sync_stop(spa->spa_dsl_pool);
751 spa->spa_sync_on = B_FALSE;
755 * Wait for any outstanding async I/O to complete.
757 if (spa->spa_async_zio_root != NULL) {
758 (void) zio_wait(spa->spa_async_zio_root);
759 spa->spa_async_zio_root = NULL;
763 * Close the dsl pool.
765 if (spa->spa_dsl_pool) {
766 dsl_pool_close(spa->spa_dsl_pool);
767 spa->spa_dsl_pool = NULL;
770 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
773 * Drop and purge level 2 cache
775 spa_l2cache_drop(spa);
780 if (spa->spa_root_vdev)
781 vdev_free(spa->spa_root_vdev);
782 ASSERT(spa->spa_root_vdev == NULL);
784 for (i = 0; i < spa->spa_spares.sav_count; i++)
785 vdev_free(spa->spa_spares.sav_vdevs[i]);
786 if (spa->spa_spares.sav_vdevs) {
787 kmem_free(spa->spa_spares.sav_vdevs,
788 spa->spa_spares.sav_count * sizeof (void *));
789 spa->spa_spares.sav_vdevs = NULL;
791 if (spa->spa_spares.sav_config) {
792 nvlist_free(spa->spa_spares.sav_config);
793 spa->spa_spares.sav_config = NULL;
795 spa->spa_spares.sav_count = 0;
797 for (i = 0; i < spa->spa_l2cache.sav_count; i++)
798 vdev_free(spa->spa_l2cache.sav_vdevs[i]);
799 if (spa->spa_l2cache.sav_vdevs) {
800 kmem_free(spa->spa_l2cache.sav_vdevs,
801 spa->spa_l2cache.sav_count * sizeof (void *));
802 spa->spa_l2cache.sav_vdevs = NULL;
804 if (spa->spa_l2cache.sav_config) {
805 nvlist_free(spa->spa_l2cache.sav_config);
806 spa->spa_l2cache.sav_config = NULL;
808 spa->spa_l2cache.sav_count = 0;
810 spa->spa_async_suspended = 0;
812 spa_config_exit(spa, SCL_ALL, FTAG);
816 * Load (or re-load) the current list of vdevs describing the active spares for
817 * this pool. When this is called, we have some form of basic information in
818 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
819 * then re-generate a more complete list including status information.
822 spa_load_spares(spa_t *spa)
829 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
832 * First, close and free any existing spare vdevs.
834 for (i = 0; i < spa->spa_spares.sav_count; i++) {
835 vd = spa->spa_spares.sav_vdevs[i];
837 /* Undo the call to spa_activate() below */
838 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
839 B_FALSE)) != NULL && tvd->vdev_isspare)
840 spa_spare_remove(tvd);
845 if (spa->spa_spares.sav_vdevs)
846 kmem_free(spa->spa_spares.sav_vdevs,
847 spa->spa_spares.sav_count * sizeof (void *));
849 if (spa->spa_spares.sav_config == NULL)
852 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
853 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
855 spa->spa_spares.sav_count = (int)nspares;
856 spa->spa_spares.sav_vdevs = NULL;
862 * Construct the array of vdevs, opening them to get status in the
863 * process. For each spare, there is potentially two different vdev_t
864 * structures associated with it: one in the list of spares (used only
865 * for basic validation purposes) and one in the active vdev
866 * configuration (if it's spared in). During this phase we open and
867 * validate each vdev on the spare list. If the vdev also exists in the
868 * active configuration, then we also mark this vdev as an active spare.
870 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *),
872 for (i = 0; i < spa->spa_spares.sav_count; i++) {
873 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0,
874 VDEV_ALLOC_SPARE) == 0);
877 spa->spa_spares.sav_vdevs[i] = vd;
879 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
881 if (!tvd->vdev_isspare)
885 * We only mark the spare active if we were successfully
886 * able to load the vdev. Otherwise, importing a pool
887 * with a bad active spare would result in strange
888 * behavior, because multiple pool would think the spare
889 * is actively in use.
891 * There is a vulnerability here to an equally bizarre
892 * circumstance, where a dead active spare is later
893 * brought back to life (onlined or otherwise). Given
894 * the rarity of this scenario, and the extra complexity
895 * it adds, we ignore the possibility.
897 if (!vdev_is_dead(tvd))
898 spa_spare_activate(tvd);
902 vd->vdev_aux = &spa->spa_spares;
904 if (vdev_open(vd) != 0)
907 if (vdev_validate_aux(vd) == 0)
912 * Recompute the stashed list of spares, with status information
915 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES,
916 DATA_TYPE_NVLIST_ARRAY) == 0);
918 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *),
920 for (i = 0; i < spa->spa_spares.sav_count; i++)
921 spares[i] = vdev_config_generate(spa,
922 spa->spa_spares.sav_vdevs[i], B_TRUE, B_TRUE, B_FALSE);
923 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
924 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0);
925 for (i = 0; i < spa->spa_spares.sav_count; i++)
926 nvlist_free(spares[i]);
927 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *));
931 * Load (or re-load) the current list of vdevs describing the active l2cache for
932 * this pool. When this is called, we have some form of basic information in
933 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
934 * then re-generate a more complete list including status information.
935 * Devices which are already active have their details maintained, and are
939 spa_load_l2cache(spa_t *spa)
945 vdev_t *vd, **oldvdevs, **newvdevs;
946 spa_aux_vdev_t *sav = &spa->spa_l2cache;
948 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
950 if (sav->sav_config != NULL) {
951 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config,
952 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
953 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP);
958 oldvdevs = sav->sav_vdevs;
959 oldnvdevs = sav->sav_count;
960 sav->sav_vdevs = NULL;
964 * Process new nvlist of vdevs.
966 for (i = 0; i < nl2cache; i++) {
967 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID,
971 for (j = 0; j < oldnvdevs; j++) {
973 if (vd != NULL && guid == vd->vdev_guid) {
975 * Retain previous vdev for add/remove ops.
983 if (newvdevs[i] == NULL) {
987 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0,
988 VDEV_ALLOC_L2CACHE) == 0);
993 * Commit this vdev as an l2cache device,
994 * even if it fails to open.
1001 spa_l2cache_activate(vd);
1003 if (vdev_open(vd) != 0)
1006 (void) vdev_validate_aux(vd);
1008 if (!vdev_is_dead(vd))
1009 l2arc_add_vdev(spa, vd);
1014 * Purge vdevs that were dropped
1016 for (i = 0; i < oldnvdevs; i++) {
1021 if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
1022 pool != 0ULL && l2arc_vdev_present(vd))
1023 l2arc_remove_vdev(vd);
1024 (void) vdev_close(vd);
1025 spa_l2cache_remove(vd);
1030 kmem_free(oldvdevs, oldnvdevs * sizeof (void *));
1032 if (sav->sav_config == NULL)
1035 sav->sav_vdevs = newvdevs;
1036 sav->sav_count = (int)nl2cache;
1039 * Recompute the stashed list of l2cache devices, with status
1040 * information this time.
1042 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE,
1043 DATA_TYPE_NVLIST_ARRAY) == 0);
1045 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
1046 for (i = 0; i < sav->sav_count; i++)
1047 l2cache[i] = vdev_config_generate(spa,
1048 sav->sav_vdevs[i], B_TRUE, B_FALSE, B_TRUE);
1049 VERIFY(nvlist_add_nvlist_array(sav->sav_config,
1050 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0);
1052 for (i = 0; i < sav->sav_count; i++)
1053 nvlist_free(l2cache[i]);
1055 kmem_free(l2cache, sav->sav_count * sizeof (void *));
1059 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value)
1062 char *packed = NULL;
1067 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db));
1068 nvsize = *(uint64_t *)db->db_data;
1069 dmu_buf_rele(db, FTAG);
1071 packed = kmem_alloc(nvsize, KM_SLEEP);
1072 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed,
1075 error = nvlist_unpack(packed, nvsize, value, 0);
1076 kmem_free(packed, nvsize);
1082 * Checks to see if the given vdev could not be opened, in which case we post a
1083 * sysevent to notify the autoreplace code that the device has been removed.
1086 spa_check_removed(vdev_t *vd)
1088 for (int c = 0; c < vd->vdev_children; c++)
1089 spa_check_removed(vd->vdev_child[c]);
1091 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd)) {
1092 zfs_post_autoreplace(vd->vdev_spa, vd);
1093 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK);
1098 * Load the slog device state from the config object since it's possible
1099 * that the label does not contain the most up-to-date information.
1102 spa_load_log_state(spa_t *spa)
1104 nvlist_t *nv, *nvroot, **child;
1107 vdev_t *rvd = spa->spa_root_vdev;
1109 VERIFY(load_nvlist(spa, spa->spa_config_object, &nv) == 0);
1110 VERIFY(nvlist_lookup_nvlist(nv, ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
1111 VERIFY(nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
1112 &child, &children) == 0);
1114 for (int c = 0; c < children; c++) {
1115 vdev_t *tvd = rvd->vdev_child[c];
1117 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
1118 &is_log) == 0 && is_log)
1119 vdev_load_log_state(tvd, child[c]);
1125 * Check for missing log devices
1128 spa_check_logs(spa_t *spa)
1130 switch (spa->spa_log_state) {
1131 case SPA_LOG_MISSING:
1132 /* need to recheck in case slog has been restored */
1133 case SPA_LOG_UNKNOWN:
1134 if (dmu_objset_find(spa->spa_name, zil_check_log_chain, NULL,
1135 DS_FIND_CHILDREN)) {
1136 spa->spa_log_state = SPA_LOG_MISSING;
1145 * Load an existing storage pool, using the pool's builtin spa_config as a
1146 * source of configuration information.
1149 spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig)
1152 nvlist_t *nvroot = NULL;
1154 uberblock_t *ub = &spa->spa_uberblock;
1155 uint64_t config_cache_txg = spa->spa_config_txg;
1158 uint64_t autoreplace = 0;
1159 int orig_mode = spa->spa_mode;
1160 char *ereport = FM_EREPORT_ZFS_POOL;
1163 * If this is an untrusted config, access the pool in read-only mode.
1164 * This prevents things like resilvering recently removed devices.
1167 spa->spa_mode = FREAD;
1169 ASSERT(MUTEX_HELD(&spa_namespace_lock));
1171 spa->spa_load_state = state;
1173 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) ||
1174 nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) {
1180 * Versioning wasn't explicitly added to the label until later, so if
1181 * it's not present treat it as the initial version.
1183 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, &version) != 0)
1184 version = SPA_VERSION_INITIAL;
1186 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG,
1187 &spa->spa_config_txg);
1189 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) &&
1190 spa_guid_exists(pool_guid, 0)) {
1195 spa->spa_load_guid = pool_guid;
1198 * Create "The Godfather" zio to hold all async IOs
1200 spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
1201 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER);
1204 * Parse the configuration into a vdev tree. We explicitly set the
1205 * value that will be returned by spa_version() since parsing the
1206 * configuration requires knowing the version number.
1208 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1209 spa->spa_ubsync.ub_version = version;
1210 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_LOAD);
1211 spa_config_exit(spa, SCL_ALL, FTAG);
1216 ASSERT(spa->spa_root_vdev == rvd);
1217 ASSERT(spa_guid(spa) == pool_guid);
1220 * Try to open all vdevs, loading each label in the process.
1222 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1223 error = vdev_open(rvd);
1224 spa_config_exit(spa, SCL_ALL, FTAG);
1229 * We need to validate the vdev labels against the configuration that
1230 * we have in hand, which is dependent on the setting of mosconfig. If
1231 * mosconfig is true then we're validating the vdev labels based on
1232 * that config. Otherwise, we're validating against the cached config
1233 * (zpool.cache) that was read when we loaded the zfs module, and then
1234 * later we will recursively call spa_load() and validate against
1237 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1238 error = vdev_validate(rvd);
1239 spa_config_exit(spa, SCL_ALL, FTAG);
1243 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) {
1249 * Find the best uberblock.
1251 vdev_uberblock_load(NULL, rvd, ub);
1254 * If we weren't able to find a single valid uberblock, return failure.
1256 if (ub->ub_txg == 0) {
1257 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1258 VDEV_AUX_CORRUPT_DATA);
1264 * If the pool is newer than the code, we can't open it.
1266 if (ub->ub_version > SPA_VERSION) {
1267 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1268 VDEV_AUX_VERSION_NEWER);
1274 * If the vdev guid sum doesn't match the uberblock, we have an
1275 * incomplete configuration.
1277 if (rvd->vdev_guid_sum != ub->ub_guid_sum && mosconfig) {
1278 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1279 VDEV_AUX_BAD_GUID_SUM);
1285 * Initialize internal SPA structures.
1287 spa->spa_state = POOL_STATE_ACTIVE;
1288 spa->spa_ubsync = spa->spa_uberblock;
1289 spa->spa_first_txg = spa_last_synced_txg(spa) + 1;
1290 error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool);
1292 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1293 VDEV_AUX_CORRUPT_DATA);
1296 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset;
1298 if (zap_lookup(spa->spa_meta_objset,
1299 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG,
1300 sizeof (uint64_t), 1, &spa->spa_config_object) != 0) {
1301 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1302 VDEV_AUX_CORRUPT_DATA);
1308 nvlist_t *newconfig;
1311 if (load_nvlist(spa, spa->spa_config_object, &newconfig) != 0) {
1312 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1313 VDEV_AUX_CORRUPT_DATA);
1318 if (!spa_is_root(spa) && nvlist_lookup_uint64(newconfig,
1319 ZPOOL_CONFIG_HOSTID, &hostid) == 0) {
1321 unsigned long myhostid = 0;
1323 VERIFY(nvlist_lookup_string(newconfig,
1324 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0);
1327 myhostid = zone_get_hostid(NULL);
1330 * We're emulating the system's hostid in userland, so
1331 * we can't use zone_get_hostid().
1333 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid);
1334 #endif /* _KERNEL */
1335 if (hostid != 0 && myhostid != 0 &&
1336 hostid != myhostid) {
1337 cmn_err(CE_WARN, "pool '%s' could not be "
1338 "loaded as it was last accessed by "
1339 "another system (host: %s hostid: 0x%lx). "
1340 "See: http://www.sun.com/msg/ZFS-8000-EY",
1341 spa_name(spa), hostname,
1342 (unsigned long)hostid);
1348 spa_config_set(spa, newconfig);
1350 spa_deactivate(spa);
1351 spa_activate(spa, orig_mode);
1353 return (spa_load(spa, newconfig, state, B_TRUE));
1356 if (zap_lookup(spa->spa_meta_objset,
1357 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST,
1358 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj) != 0) {
1359 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1360 VDEV_AUX_CORRUPT_DATA);
1366 * Load the bit that tells us to use the new accounting function
1367 * (raid-z deflation). If we have an older pool, this will not
1370 error = zap_lookup(spa->spa_meta_objset,
1371 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
1372 sizeof (uint64_t), 1, &spa->spa_deflate);
1373 if (error != 0 && error != ENOENT) {
1374 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1375 VDEV_AUX_CORRUPT_DATA);
1381 * Load the persistent error log. If we have an older pool, this will
1384 error = zap_lookup(spa->spa_meta_objset,
1385 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_LAST,
1386 sizeof (uint64_t), 1, &spa->spa_errlog_last);
1387 if (error != 0 && error != ENOENT) {
1388 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1389 VDEV_AUX_CORRUPT_DATA);
1394 error = zap_lookup(spa->spa_meta_objset,
1395 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_SCRUB,
1396 sizeof (uint64_t), 1, &spa->spa_errlog_scrub);
1397 if (error != 0 && error != ENOENT) {
1398 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1399 VDEV_AUX_CORRUPT_DATA);
1405 * Load the history object. If we have an older pool, this
1406 * will not be present.
1408 error = zap_lookup(spa->spa_meta_objset,
1409 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_HISTORY,
1410 sizeof (uint64_t), 1, &spa->spa_history);
1411 if (error != 0 && error != ENOENT) {
1412 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1413 VDEV_AUX_CORRUPT_DATA);
1419 * Load any hot spares for this pool.
1421 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
1422 DMU_POOL_SPARES, sizeof (uint64_t), 1, &spa->spa_spares.sav_object);
1423 if (error != 0 && error != ENOENT) {
1424 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1425 VDEV_AUX_CORRUPT_DATA);
1430 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES);
1431 if (load_nvlist(spa, spa->spa_spares.sav_object,
1432 &spa->spa_spares.sav_config) != 0) {
1433 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1434 VDEV_AUX_CORRUPT_DATA);
1439 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1440 spa_load_spares(spa);
1441 spa_config_exit(spa, SCL_ALL, FTAG);
1445 * Load any level 2 ARC devices for this pool.
1447 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
1448 DMU_POOL_L2CACHE, sizeof (uint64_t), 1,
1449 &spa->spa_l2cache.sav_object);
1450 if (error != 0 && error != ENOENT) {
1451 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1452 VDEV_AUX_CORRUPT_DATA);
1457 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE);
1458 if (load_nvlist(spa, spa->spa_l2cache.sav_object,
1459 &spa->spa_l2cache.sav_config) != 0) {
1460 vdev_set_state(rvd, B_TRUE,
1461 VDEV_STATE_CANT_OPEN,
1462 VDEV_AUX_CORRUPT_DATA);
1467 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1468 spa_load_l2cache(spa);
1469 spa_config_exit(spa, SCL_ALL, FTAG);
1472 spa_load_log_state(spa);
1474 if (spa_check_logs(spa)) {
1475 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1478 ereport = FM_EREPORT_ZFS_LOG_REPLAY;
1483 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
1485 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
1486 DMU_POOL_PROPS, sizeof (uint64_t), 1, &spa->spa_pool_props_object);
1488 if (error && error != ENOENT) {
1489 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN,
1490 VDEV_AUX_CORRUPT_DATA);
1496 (void) zap_lookup(spa->spa_meta_objset,
1497 spa->spa_pool_props_object,
1498 zpool_prop_to_name(ZPOOL_PROP_BOOTFS),
1499 sizeof (uint64_t), 1, &spa->spa_bootfs);
1500 (void) zap_lookup(spa->spa_meta_objset,
1501 spa->spa_pool_props_object,
1502 zpool_prop_to_name(ZPOOL_PROP_AUTOREPLACE),
1503 sizeof (uint64_t), 1, &autoreplace);
1504 (void) zap_lookup(spa->spa_meta_objset,
1505 spa->spa_pool_props_object,
1506 zpool_prop_to_name(ZPOOL_PROP_DELEGATION),
1507 sizeof (uint64_t), 1, &spa->spa_delegation);
1508 (void) zap_lookup(spa->spa_meta_objset,
1509 spa->spa_pool_props_object,
1510 zpool_prop_to_name(ZPOOL_PROP_FAILUREMODE),
1511 sizeof (uint64_t), 1, &spa->spa_failmode);
1512 (void) zap_lookup(spa->spa_meta_objset,
1513 spa->spa_pool_props_object,
1514 zpool_prop_to_name(ZPOOL_PROP_AUTOEXPAND),
1515 sizeof (uint64_t), 1, &spa->spa_autoexpand);
1519 * If the 'autoreplace' property is set, then post a resource notifying
1520 * the ZFS DE that it should not issue any faults for unopenable
1521 * devices. We also iterate over the vdevs, and post a sysevent for any
1522 * unopenable vdevs so that the normal autoreplace handler can take
1525 if (autoreplace && state != SPA_LOAD_TRYIMPORT)
1526 spa_check_removed(spa->spa_root_vdev);
1529 * Load the vdev state for all toplevel vdevs.
1534 * Propagate the leaf DTLs we just loaded all the way up the tree.
1536 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1537 vdev_dtl_reassess(rvd, 0, 0, B_FALSE);
1538 spa_config_exit(spa, SCL_ALL, FTAG);
1541 * Check the state of the root vdev. If it can't be opened, it
1542 * indicates one or more toplevel vdevs are faulted.
1544 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) {
1549 if (spa_writeable(spa)) {
1551 int need_update = B_FALSE;
1553 ASSERT(state != SPA_LOAD_TRYIMPORT);
1556 * Claim log blocks that haven't been committed yet.
1557 * This must all happen in a single txg.
1559 tx = dmu_tx_create_assigned(spa_get_dsl(spa),
1560 spa_first_txg(spa));
1561 (void) dmu_objset_find(spa_name(spa),
1562 zil_claim, tx, DS_FIND_CHILDREN);
1565 spa->spa_log_state = SPA_LOG_GOOD;
1566 spa->spa_sync_on = B_TRUE;
1567 txg_sync_start(spa->spa_dsl_pool);
1570 * Wait for all claims to sync.
1572 txg_wait_synced(spa->spa_dsl_pool, 0);
1575 * If the config cache is stale, or we have uninitialized
1576 * metaslabs (see spa_vdev_add()), then update the config.
1578 if (config_cache_txg != spa->spa_config_txg ||
1579 state == SPA_LOAD_IMPORT)
1580 need_update = B_TRUE;
1582 for (int c = 0; c < rvd->vdev_children; c++)
1583 if (rvd->vdev_child[c]->vdev_ms_array == 0)
1584 need_update = B_TRUE;
1587 * Update the config cache asychronously in case we're the
1588 * root pool, in which case the config cache isn't writable yet.
1591 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
1594 * Check all DTLs to see if anything needs resilvering.
1596 if (vdev_resilver_needed(rvd, NULL, NULL))
1597 spa_async_request(spa, SPA_ASYNC_RESILVER);
1602 spa->spa_minref = refcount_count(&spa->spa_refcount);
1603 if (error && error != EBADF)
1604 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0);
1605 spa->spa_load_state = SPA_LOAD_NONE;
1614 * The import case is identical to an open except that the configuration is sent
1615 * down from userland, instead of grabbed from the configuration cache. For the
1616 * case of an open, the pool configuration will exist in the
1617 * POOL_STATE_UNINITIALIZED state.
1619 * The stats information (gen/count/ustats) is used to gather vdev statistics at
1620 * the same time open the pool, without having to keep around the spa_t in some
1624 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config)
1628 int locked = B_FALSE;
1633 * As disgusting as this is, we need to support recursive calls to this
1634 * function because dsl_dir_open() is called during spa_load(), and ends
1635 * up calling spa_open() again. The real fix is to figure out how to
1636 * avoid dsl_dir_open() calling this in the first place.
1638 if (mutex_owner(&spa_namespace_lock) != curthread) {
1639 mutex_enter(&spa_namespace_lock);
1643 if ((spa = spa_lookup(pool)) == NULL) {
1645 mutex_exit(&spa_namespace_lock);
1648 if (spa->spa_state == POOL_STATE_UNINITIALIZED) {
1650 spa_activate(spa, spa_mode_global);
1652 error = spa_load(spa, spa->spa_config, SPA_LOAD_OPEN, B_FALSE);
1654 if (error == EBADF) {
1656 * If vdev_validate() returns failure (indicated by
1657 * EBADF), it indicates that one of the vdevs indicates
1658 * that the pool has been exported or destroyed. If
1659 * this is the case, the config cache is out of sync and
1660 * we should remove the pool from the namespace.
1663 spa_deactivate(spa);
1664 spa_config_sync(spa, B_TRUE, B_TRUE);
1667 mutex_exit(&spa_namespace_lock);
1673 * We can't open the pool, but we still have useful
1674 * information: the state of each vdev after the
1675 * attempted vdev_open(). Return this to the user.
1677 if (config != NULL && spa->spa_root_vdev != NULL)
1678 *config = spa_config_generate(spa, NULL, -1ULL,
1681 spa_deactivate(spa);
1682 spa->spa_last_open_failed = B_TRUE;
1684 mutex_exit(&spa_namespace_lock);
1688 spa->spa_last_open_failed = B_FALSE;
1692 spa_open_ref(spa, tag);
1695 mutex_exit(&spa_namespace_lock);
1700 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
1706 spa_open(const char *name, spa_t **spapp, void *tag)
1708 return (spa_open_common(name, spapp, tag, NULL));
1712 * Lookup the given spa_t, incrementing the inject count in the process,
1713 * preventing it from being exported or destroyed.
1716 spa_inject_addref(char *name)
1720 mutex_enter(&spa_namespace_lock);
1721 if ((spa = spa_lookup(name)) == NULL) {
1722 mutex_exit(&spa_namespace_lock);
1725 spa->spa_inject_ref++;
1726 mutex_exit(&spa_namespace_lock);
1732 spa_inject_delref(spa_t *spa)
1734 mutex_enter(&spa_namespace_lock);
1735 spa->spa_inject_ref--;
1736 mutex_exit(&spa_namespace_lock);
1740 * Add spares device information to the nvlist.
1743 spa_add_spares(spa_t *spa, nvlist_t *config)
1753 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
1755 if (spa->spa_spares.sav_count == 0)
1758 VERIFY(nvlist_lookup_nvlist(config,
1759 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
1760 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
1761 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
1763 VERIFY(nvlist_add_nvlist_array(nvroot,
1764 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
1765 VERIFY(nvlist_lookup_nvlist_array(nvroot,
1766 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
1769 * Go through and find any spares which have since been
1770 * repurposed as an active spare. If this is the case, update
1771 * their status appropriately.
1773 for (i = 0; i < nspares; i++) {
1774 VERIFY(nvlist_lookup_uint64(spares[i],
1775 ZPOOL_CONFIG_GUID, &guid) == 0);
1776 if (spa_spare_exists(guid, &pool, NULL) &&
1778 VERIFY(nvlist_lookup_uint64_array(
1779 spares[i], ZPOOL_CONFIG_STATS,
1780 (uint64_t **)&vs, &vsc) == 0);
1781 vs->vs_state = VDEV_STATE_CANT_OPEN;
1782 vs->vs_aux = VDEV_AUX_SPARED;
1789 * Add l2cache device information to the nvlist, including vdev stats.
1792 spa_add_l2cache(spa_t *spa, nvlist_t *config)
1795 uint_t i, j, nl2cache;
1802 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
1804 if (spa->spa_l2cache.sav_count == 0)
1807 VERIFY(nvlist_lookup_nvlist(config,
1808 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
1809 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
1810 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
1811 if (nl2cache != 0) {
1812 VERIFY(nvlist_add_nvlist_array(nvroot,
1813 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
1814 VERIFY(nvlist_lookup_nvlist_array(nvroot,
1815 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
1818 * Update level 2 cache device stats.
1821 for (i = 0; i < nl2cache; i++) {
1822 VERIFY(nvlist_lookup_uint64(l2cache[i],
1823 ZPOOL_CONFIG_GUID, &guid) == 0);
1826 for (j = 0; j < spa->spa_l2cache.sav_count; j++) {
1828 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) {
1829 vd = spa->spa_l2cache.sav_vdevs[j];
1835 VERIFY(nvlist_lookup_uint64_array(l2cache[i],
1836 ZPOOL_CONFIG_STATS, (uint64_t **)&vs, &vsc) == 0);
1837 vdev_get_stats(vd, vs);
1843 spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen)
1849 error = spa_open_common(name, &spa, FTAG, config);
1853 * This still leaves a window of inconsistency where the spares
1854 * or l2cache devices could change and the config would be
1855 * self-inconsistent.
1857 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
1859 if (*config != NULL) {
1860 VERIFY(nvlist_add_uint64(*config,
1861 ZPOOL_CONFIG_ERRCOUNT,
1862 spa_get_errlog_size(spa)) == 0);
1864 if (spa_suspended(spa))
1865 VERIFY(nvlist_add_uint64(*config,
1866 ZPOOL_CONFIG_SUSPENDED,
1867 spa->spa_failmode) == 0);
1869 spa_add_spares(spa, *config);
1870 spa_add_l2cache(spa, *config);
1875 * We want to get the alternate root even for faulted pools, so we cheat
1876 * and call spa_lookup() directly.
1880 mutex_enter(&spa_namespace_lock);
1881 spa = spa_lookup(name);
1883 spa_altroot(spa, altroot, buflen);
1887 mutex_exit(&spa_namespace_lock);
1889 spa_altroot(spa, altroot, buflen);
1894 spa_config_exit(spa, SCL_CONFIG, FTAG);
1895 spa_close(spa, FTAG);
1902 * Validate that the auxiliary device array is well formed. We must have an
1903 * array of nvlists, each which describes a valid leaf vdev. If this is an
1904 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
1905 * specified, as long as they are well-formed.
1908 spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode,
1909 spa_aux_vdev_t *sav, const char *config, uint64_t version,
1910 vdev_labeltype_t label)
1917 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1920 * It's acceptable to have no devs specified.
1922 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0)
1929 * Make sure the pool is formatted with a version that supports this
1932 if (spa_version(spa) < version)
1936 * Set the pending device list so we correctly handle device in-use
1939 sav->sav_pending = dev;
1940 sav->sav_npending = ndev;
1942 for (i = 0; i < ndev; i++) {
1943 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0,
1947 if (!vd->vdev_ops->vdev_op_leaf) {
1954 * The L2ARC currently only supports disk devices in
1955 * kernel context. For user-level testing, we allow it.
1958 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) &&
1959 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) {
1966 if ((error = vdev_open(vd)) == 0 &&
1967 (error = vdev_label_init(vd, crtxg, label)) == 0) {
1968 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID,
1969 vd->vdev_guid) == 0);
1975 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE))
1982 sav->sav_pending = NULL;
1983 sav->sav_npending = 0;
1988 spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode)
1992 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1994 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode,
1995 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES,
1996 VDEV_LABEL_SPARE)) != 0) {
2000 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode,
2001 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE,
2002 VDEV_LABEL_L2CACHE));
2006 spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs,
2011 if (sav->sav_config != NULL) {
2017 * Generate new dev list by concatentating with the
2020 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config,
2021 &olddevs, &oldndevs) == 0);
2023 newdevs = kmem_alloc(sizeof (void *) *
2024 (ndevs + oldndevs), KM_SLEEP);
2025 for (i = 0; i < oldndevs; i++)
2026 VERIFY(nvlist_dup(olddevs[i], &newdevs[i],
2028 for (i = 0; i < ndevs; i++)
2029 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs],
2032 VERIFY(nvlist_remove(sav->sav_config, config,
2033 DATA_TYPE_NVLIST_ARRAY) == 0);
2035 VERIFY(nvlist_add_nvlist_array(sav->sav_config,
2036 config, newdevs, ndevs + oldndevs) == 0);
2037 for (i = 0; i < oldndevs + ndevs; i++)
2038 nvlist_free(newdevs[i]);
2039 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *));
2042 * Generate a new dev list.
2044 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME,
2046 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config,
2052 * Stop and drop level 2 ARC devices
2055 spa_l2cache_drop(spa_t *spa)
2059 spa_aux_vdev_t *sav = &spa->spa_l2cache;
2061 for (i = 0; i < sav->sav_count; i++) {
2064 vd = sav->sav_vdevs[i];
2067 if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
2068 pool != 0ULL && l2arc_vdev_present(vd))
2069 l2arc_remove_vdev(vd);
2070 if (vd->vdev_isl2cache)
2071 spa_l2cache_remove(vd);
2072 vdev_clear_stats(vd);
2073 (void) vdev_close(vd);
2081 spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props,
2082 const char *history_str, nvlist_t *zplprops)
2085 char *altroot = NULL;
2090 uint64_t txg = TXG_INITIAL;
2091 nvlist_t **spares, **l2cache;
2092 uint_t nspares, nl2cache;
2096 * If this pool already exists, return failure.
2098 mutex_enter(&spa_namespace_lock);
2099 if (spa_lookup(pool) != NULL) {
2100 mutex_exit(&spa_namespace_lock);
2105 * Allocate a new spa_t structure.
2107 (void) nvlist_lookup_string(props,
2108 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
2109 spa = spa_add(pool, altroot);
2110 spa_activate(spa, spa_mode_global);
2112 spa->spa_uberblock.ub_txg = txg - 1;
2114 if (props && (error = spa_prop_validate(spa, props))) {
2115 spa_deactivate(spa);
2117 mutex_exit(&spa_namespace_lock);
2121 if (nvlist_lookup_uint64(props, zpool_prop_to_name(ZPOOL_PROP_VERSION),
2123 version = SPA_VERSION;
2124 ASSERT(version <= SPA_VERSION);
2125 spa->spa_uberblock.ub_version = version;
2126 spa->spa_ubsync = spa->spa_uberblock;
2129 * Create "The Godfather" zio to hold all async IOs
2131 spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
2132 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER);
2135 * Create the root vdev.
2137 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2139 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD);
2141 ASSERT(error != 0 || rvd != NULL);
2142 ASSERT(error != 0 || spa->spa_root_vdev == rvd);
2144 if (error == 0 && !zfs_allocatable_devs(nvroot))
2148 (error = vdev_create(rvd, txg, B_FALSE)) == 0 &&
2149 (error = spa_validate_aux(spa, nvroot, txg,
2150 VDEV_ALLOC_ADD)) == 0) {
2151 for (int c = 0; c < rvd->vdev_children; c++) {
2152 vdev_metaslab_set_size(rvd->vdev_child[c]);
2153 vdev_expand(rvd->vdev_child[c], txg);
2157 spa_config_exit(spa, SCL_ALL, FTAG);
2161 spa_deactivate(spa);
2163 mutex_exit(&spa_namespace_lock);
2168 * Get the list of spares, if specified.
2170 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
2171 &spares, &nspares) == 0) {
2172 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME,
2174 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
2175 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
2176 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2177 spa_load_spares(spa);
2178 spa_config_exit(spa, SCL_ALL, FTAG);
2179 spa->spa_spares.sav_sync = B_TRUE;
2183 * Get the list of level 2 cache devices, if specified.
2185 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
2186 &l2cache, &nl2cache) == 0) {
2187 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
2188 NV_UNIQUE_NAME, KM_SLEEP) == 0);
2189 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
2190 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
2191 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2192 spa_load_l2cache(spa);
2193 spa_config_exit(spa, SCL_ALL, FTAG);
2194 spa->spa_l2cache.sav_sync = B_TRUE;
2197 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg);
2198 spa->spa_meta_objset = dp->dp_meta_objset;
2200 tx = dmu_tx_create_assigned(dp, txg);
2203 * Create the pool config object.
2205 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset,
2206 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE,
2207 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx);
2209 if (zap_add(spa->spa_meta_objset,
2210 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG,
2211 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) {
2212 cmn_err(CE_PANIC, "failed to add pool config");
2215 /* Newly created pools with the right version are always deflated. */
2216 if (version >= SPA_VERSION_RAIDZ_DEFLATE) {
2217 spa->spa_deflate = TRUE;
2218 if (zap_add(spa->spa_meta_objset,
2219 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
2220 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) {
2221 cmn_err(CE_PANIC, "failed to add deflate");
2226 * Create the deferred-free bplist object. Turn off compression
2227 * because sync-to-convergence takes longer if the blocksize
2230 spa->spa_sync_bplist_obj = bplist_create(spa->spa_meta_objset,
2232 dmu_object_set_compress(spa->spa_meta_objset, spa->spa_sync_bplist_obj,
2233 ZIO_COMPRESS_OFF, tx);
2235 if (zap_add(spa->spa_meta_objset,
2236 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST,
2237 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj, tx) != 0) {
2238 cmn_err(CE_PANIC, "failed to add bplist");
2242 * Create the pool's history object.
2244 if (version >= SPA_VERSION_ZPOOL_HISTORY)
2245 spa_history_create_obj(spa, tx);
2248 * Set pool properties.
2250 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS);
2251 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
2252 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE);
2253 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND);
2254 if (props != NULL) {
2255 spa_configfile_set(spa, props, B_FALSE);
2256 spa_sync_props(spa, props, CRED(), tx);
2261 spa->spa_sync_on = B_TRUE;
2262 txg_sync_start(spa->spa_dsl_pool);
2265 * We explicitly wait for the first transaction to complete so that our
2266 * bean counters are appropriately updated.
2268 txg_wait_synced(spa->spa_dsl_pool, txg);
2270 spa_config_sync(spa, B_FALSE, B_TRUE);
2272 if (version >= SPA_VERSION_ZPOOL_HISTORY && history_str != NULL)
2273 (void) spa_history_log(spa, history_str, LOG_CMD_POOL_CREATE);
2275 spa->spa_minref = refcount_count(&spa->spa_refcount);
2277 mutex_exit(&spa_namespace_lock);
2284 * Get the root pool information from the root disk, then import the root pool
2285 * during the system boot up time.
2287 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
2290 spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid)
2293 nvlist_t *nvtop, *nvroot;
2296 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0)
2300 * Add this top-level vdev to the child array.
2302 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
2304 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
2306 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0);
2309 * Put this pool's top-level vdevs into a root vdev.
2311 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
2312 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
2313 VDEV_TYPE_ROOT) == 0);
2314 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0);
2315 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0);
2316 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
2320 * Replace the existing vdev_tree with the new root vdev in
2321 * this pool's configuration (remove the old, add the new).
2323 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
2324 nvlist_free(nvroot);
2329 * Walk the vdev tree and see if we can find a device with "better"
2330 * configuration. A configuration is "better" if the label on that
2331 * device has a more recent txg.
2334 spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg)
2336 for (int c = 0; c < vd->vdev_children; c++)
2337 spa_alt_rootvdev(vd->vdev_child[c], avd, txg);
2339 if (vd->vdev_ops->vdev_op_leaf) {
2343 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid,
2347 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG,
2351 * Do we have a better boot device?
2353 if (label_txg > *txg) {
2362 * Import a root pool.
2364 * For x86. devpath_list will consist of devid and/or physpath name of
2365 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
2366 * The GRUB "findroot" command will return the vdev we should boot.
2368 * For Sparc, devpath_list consists the physpath name of the booting device
2369 * no matter the rootpool is a single device pool or a mirrored pool.
2371 * "/pci@1f,0/ide@d/disk@0,0:a"
2374 spa_import_rootpool(char *devpath, char *devid)
2377 vdev_t *rvd, *bvd, *avd = NULL;
2378 nvlist_t *config, *nvtop;
2384 * Read the label from the boot device and generate a configuration.
2386 if ((config = spa_generate_rootconf(devpath, devid, &guid)) == NULL) {
2387 cmn_err(CE_NOTE, "Can not read the pool label from '%s'",
2392 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
2394 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0);
2396 mutex_enter(&spa_namespace_lock);
2397 if ((spa = spa_lookup(pname)) != NULL) {
2399 * Remove the existing root pool from the namespace so that we
2400 * can replace it with the correct config we just read in.
2405 spa = spa_add(pname, NULL);
2406 spa->spa_is_root = B_TRUE;
2409 * Build up a vdev tree based on the boot device's label config.
2411 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
2413 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2414 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
2415 VDEV_ALLOC_ROOTPOOL);
2416 spa_config_exit(spa, SCL_ALL, FTAG);
2418 mutex_exit(&spa_namespace_lock);
2419 nvlist_free(config);
2420 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
2426 * Get the boot vdev.
2428 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) {
2429 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu",
2430 (u_longlong_t)guid);
2436 * Determine if there is a better boot device.
2439 spa_alt_rootvdev(rvd, &avd, &txg);
2441 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please "
2442 "try booting from '%s'", avd->vdev_path);
2448 * If the boot device is part of a spare vdev then ensure that
2449 * we're booting off the active spare.
2451 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops &&
2452 !bvd->vdev_isspare) {
2453 cmn_err(CE_NOTE, "The boot device is currently spared. Please "
2454 "try booting from '%s'",
2455 bvd->vdev_parent->vdev_child[1]->vdev_path);
2460 VERIFY(nvlist_dup(config, &spa->spa_config, 0) == 0);
2463 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2465 spa_config_exit(spa, SCL_ALL, FTAG);
2466 mutex_exit(&spa_namespace_lock);
2468 nvlist_free(config);
2475 * Take a pool and insert it into the namespace as if it had been loaded at
2479 spa_import_verbatim(const char *pool, nvlist_t *config, nvlist_t *props)
2482 char *altroot = NULL;
2484 mutex_enter(&spa_namespace_lock);
2485 if (spa_lookup(pool) != NULL) {
2486 mutex_exit(&spa_namespace_lock);
2490 (void) nvlist_lookup_string(props,
2491 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
2492 spa = spa_add(pool, altroot);
2494 VERIFY(nvlist_dup(config, &spa->spa_config, 0) == 0);
2497 spa_configfile_set(spa, props, B_FALSE);
2499 spa_config_sync(spa, B_FALSE, B_TRUE);
2501 mutex_exit(&spa_namespace_lock);
2507 * Import a non-root pool into the system.
2510 spa_import(const char *pool, nvlist_t *config, nvlist_t *props)
2513 char *altroot = NULL;
2516 nvlist_t **spares, **l2cache;
2517 uint_t nspares, nl2cache;
2520 * If a pool with this name exists, return failure.
2522 mutex_enter(&spa_namespace_lock);
2523 if ((spa = spa_lookup(pool)) != NULL) {
2524 mutex_exit(&spa_namespace_lock);
2529 * Create and initialize the spa structure.
2531 (void) nvlist_lookup_string(props,
2532 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
2533 spa = spa_add(pool, altroot);
2534 spa_activate(spa, spa_mode_global);
2537 * Don't start async tasks until we know everything is healthy.
2539 spa_async_suspend(spa);
2542 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
2543 * because the user-supplied config is actually the one to trust when
2546 error = spa_load(spa, config, SPA_LOAD_IMPORT, B_TRUE);
2548 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2550 * Toss any existing sparelist, as it doesn't have any validity
2551 * anymore, and conflicts with spa_has_spare().
2553 if (spa->spa_spares.sav_config) {
2554 nvlist_free(spa->spa_spares.sav_config);
2555 spa->spa_spares.sav_config = NULL;
2556 spa_load_spares(spa);
2558 if (spa->spa_l2cache.sav_config) {
2559 nvlist_free(spa->spa_l2cache.sav_config);
2560 spa->spa_l2cache.sav_config = NULL;
2561 spa_load_l2cache(spa);
2564 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
2567 error = spa_validate_aux(spa, nvroot, -1ULL,
2570 error = spa_validate_aux(spa, nvroot, -1ULL,
2571 VDEV_ALLOC_L2CACHE);
2572 spa_config_exit(spa, SCL_ALL, FTAG);
2575 spa_configfile_set(spa, props, B_FALSE);
2577 if (error != 0 || (props && spa_writeable(spa) &&
2578 (error = spa_prop_set(spa, props)))) {
2580 spa_deactivate(spa);
2582 mutex_exit(&spa_namespace_lock);
2586 spa_async_resume(spa);
2589 * Override any spares and level 2 cache devices as specified by
2590 * the user, as these may have correct device names/devids, etc.
2592 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
2593 &spares, &nspares) == 0) {
2594 if (spa->spa_spares.sav_config)
2595 VERIFY(nvlist_remove(spa->spa_spares.sav_config,
2596 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0);
2598 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config,
2599 NV_UNIQUE_NAME, KM_SLEEP) == 0);
2600 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
2601 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
2602 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2603 spa_load_spares(spa);
2604 spa_config_exit(spa, SCL_ALL, FTAG);
2605 spa->spa_spares.sav_sync = B_TRUE;
2607 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
2608 &l2cache, &nl2cache) == 0) {
2609 if (spa->spa_l2cache.sav_config)
2610 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config,
2611 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0);
2613 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
2614 NV_UNIQUE_NAME, KM_SLEEP) == 0);
2615 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
2616 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
2617 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2618 spa_load_l2cache(spa);
2619 spa_config_exit(spa, SCL_ALL, FTAG);
2620 spa->spa_l2cache.sav_sync = B_TRUE;
2623 if (spa_writeable(spa)) {
2625 * Update the config cache to include the newly-imported pool.
2627 spa_config_update_common(spa, SPA_CONFIG_UPDATE_POOL, B_FALSE);
2631 * It's possible that the pool was expanded while it was exported.
2632 * We kick off an async task to handle this for us.
2634 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND);
2636 mutex_exit(&spa_namespace_lock);
2643 * This (illegal) pool name is used when temporarily importing a spa_t in order
2644 * to get the vdev stats associated with the imported devices.
2646 #define TRYIMPORT_NAME "$import"
2649 spa_tryimport(nvlist_t *tryconfig)
2651 nvlist_t *config = NULL;
2657 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname))
2660 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state))
2664 * Create and initialize the spa structure.
2666 mutex_enter(&spa_namespace_lock);
2667 spa = spa_add(TRYIMPORT_NAME, NULL);
2668 spa_activate(spa, FREAD);
2671 * Pass off the heavy lifting to spa_load().
2672 * Pass TRUE for mosconfig because the user-supplied config
2673 * is actually the one to trust when doing an import.
2675 error = spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE);
2678 * If 'tryconfig' was at least parsable, return the current config.
2680 if (spa->spa_root_vdev != NULL) {
2681 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
2682 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME,
2684 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
2686 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP,
2687 spa->spa_uberblock.ub_timestamp) == 0);
2690 * If the bootfs property exists on this pool then we
2691 * copy it out so that external consumers can tell which
2692 * pools are bootable.
2694 if ((!error || error == EEXIST) && spa->spa_bootfs) {
2695 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
2698 * We have to play games with the name since the
2699 * pool was opened as TRYIMPORT_NAME.
2701 if (dsl_dsobj_to_dsname(spa_name(spa),
2702 spa->spa_bootfs, tmpname) == 0) {
2704 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
2706 cp = strchr(tmpname, '/');
2708 (void) strlcpy(dsname, tmpname,
2711 (void) snprintf(dsname, MAXPATHLEN,
2712 "%s/%s", poolname, ++cp);
2714 VERIFY(nvlist_add_string(config,
2715 ZPOOL_CONFIG_BOOTFS, dsname) == 0);
2716 kmem_free(dsname, MAXPATHLEN);
2718 kmem_free(tmpname, MAXPATHLEN);
2722 * Add the list of hot spares and level 2 cache devices.
2724 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
2725 spa_add_spares(spa, config);
2726 spa_add_l2cache(spa, config);
2727 spa_config_exit(spa, SCL_CONFIG, FTAG);
2731 spa_deactivate(spa);
2733 mutex_exit(&spa_namespace_lock);
2739 * Pool export/destroy
2741 * The act of destroying or exporting a pool is very simple. We make sure there
2742 * is no more pending I/O and any references to the pool are gone. Then, we
2743 * update the pool state and sync all the labels to disk, removing the
2744 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
2745 * we don't sync the labels or remove the configuration cache.
2748 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig,
2749 boolean_t force, boolean_t hardforce)
2756 if (!(spa_mode_global & FWRITE))
2759 mutex_enter(&spa_namespace_lock);
2760 if ((spa = spa_lookup(pool)) == NULL) {
2761 mutex_exit(&spa_namespace_lock);
2766 * Put a hold on the pool, drop the namespace lock, stop async tasks,
2767 * reacquire the namespace lock, and see if we can export.
2769 spa_open_ref(spa, FTAG);
2770 mutex_exit(&spa_namespace_lock);
2771 spa_async_suspend(spa);
2772 mutex_enter(&spa_namespace_lock);
2773 spa_close(spa, FTAG);
2776 * The pool will be in core if it's openable,
2777 * in which case we can modify its state.
2779 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) {
2781 * Objsets may be open only because they're dirty, so we
2782 * have to force it to sync before checking spa_refcnt.
2784 txg_wait_synced(spa->spa_dsl_pool, 0);
2787 * A pool cannot be exported or destroyed if there are active
2788 * references. If we are resetting a pool, allow references by
2789 * fault injection handlers.
2791 if (!spa_refcount_zero(spa) ||
2792 (spa->spa_inject_ref != 0 &&
2793 new_state != POOL_STATE_UNINITIALIZED)) {
2794 spa_async_resume(spa);
2795 mutex_exit(&spa_namespace_lock);
2800 * A pool cannot be exported if it has an active shared spare.
2801 * This is to prevent other pools stealing the active spare
2802 * from an exported pool. At user's own will, such pool can
2803 * be forcedly exported.
2805 if (!force && new_state == POOL_STATE_EXPORTED &&
2806 spa_has_active_shared_spare(spa)) {
2807 spa_async_resume(spa);
2808 mutex_exit(&spa_namespace_lock);
2813 * We want this to be reflected on every label,
2814 * so mark them all dirty. spa_unload() will do the
2815 * final sync that pushes these changes out.
2817 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) {
2818 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2819 spa->spa_state = new_state;
2820 spa->spa_final_txg = spa_last_synced_txg(spa) + 1;
2821 vdev_config_dirty(spa->spa_root_vdev);
2822 spa_config_exit(spa, SCL_ALL, FTAG);
2826 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY);
2828 if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
2830 spa_deactivate(spa);
2833 if (oldconfig && spa->spa_config)
2834 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0);
2836 if (new_state != POOL_STATE_UNINITIALIZED) {
2838 spa_config_sync(spa, B_TRUE, B_TRUE);
2841 mutex_exit(&spa_namespace_lock);
2847 * Destroy a storage pool.
2850 spa_destroy(char *pool)
2852 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL,
2857 * Export a storage pool.
2860 spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
2861 boolean_t hardforce)
2863 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig,
2868 * Similar to spa_export(), this unloads the spa_t without actually removing it
2869 * from the namespace in any way.
2872 spa_reset(char *pool)
2874 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL,
2879 * ==========================================================================
2880 * Device manipulation
2881 * ==========================================================================
2885 * Add a device to a storage pool.
2888 spa_vdev_add(spa_t *spa, nvlist_t *nvroot)
2892 vdev_t *rvd = spa->spa_root_vdev;
2894 nvlist_t **spares, **l2cache;
2895 uint_t nspares, nl2cache;
2897 txg = spa_vdev_enter(spa);
2899 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0,
2900 VDEV_ALLOC_ADD)) != 0)
2901 return (spa_vdev_exit(spa, NULL, txg, error));
2903 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */
2905 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares,
2909 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache,
2913 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0)
2914 return (spa_vdev_exit(spa, vd, txg, EINVAL));
2916 if (vd->vdev_children != 0 &&
2917 (error = vdev_create(vd, txg, B_FALSE)) != 0)
2918 return (spa_vdev_exit(spa, vd, txg, error));
2921 * We must validate the spares and l2cache devices after checking the
2922 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
2924 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0)
2925 return (spa_vdev_exit(spa, vd, txg, error));
2928 * Transfer each new top-level vdev from vd to rvd.
2930 for (int c = 0; c < vd->vdev_children; c++) {
2931 tvd = vd->vdev_child[c];
2932 vdev_remove_child(vd, tvd);
2933 tvd->vdev_id = rvd->vdev_children;
2934 vdev_add_child(rvd, tvd);
2935 vdev_config_dirty(tvd);
2939 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares,
2940 ZPOOL_CONFIG_SPARES);
2941 spa_load_spares(spa);
2942 spa->spa_spares.sav_sync = B_TRUE;
2945 if (nl2cache != 0) {
2946 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache,
2947 ZPOOL_CONFIG_L2CACHE);
2948 spa_load_l2cache(spa);
2949 spa->spa_l2cache.sav_sync = B_TRUE;
2953 * We have to be careful when adding new vdevs to an existing pool.
2954 * If other threads start allocating from these vdevs before we
2955 * sync the config cache, and we lose power, then upon reboot we may
2956 * fail to open the pool because there are DVAs that the config cache
2957 * can't translate. Therefore, we first add the vdevs without
2958 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
2959 * and then let spa_config_update() initialize the new metaslabs.
2961 * spa_load() checks for added-but-not-initialized vdevs, so that
2962 * if we lose power at any point in this sequence, the remaining
2963 * steps will be completed the next time we load the pool.
2965 (void) spa_vdev_exit(spa, vd, txg, 0);
2967 mutex_enter(&spa_namespace_lock);
2968 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
2969 mutex_exit(&spa_namespace_lock);
2975 * Attach a device to a mirror. The arguments are the path to any device
2976 * in the mirror, and the nvroot for the new device. If the path specifies
2977 * a device that is not mirrored, we automatically insert the mirror vdev.
2979 * If 'replacing' is specified, the new device is intended to replace the
2980 * existing device; in this case the two devices are made into their own
2981 * mirror using the 'replacing' vdev, which is functionally identical to
2982 * the mirror vdev (it actually reuses all the same ops) but has a few
2983 * extra rules: you can't attach to it after it's been created, and upon
2984 * completion of resilvering, the first disk (the one being replaced)
2985 * is automatically detached.
2988 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing)
2990 uint64_t txg, open_txg;
2991 vdev_t *rvd = spa->spa_root_vdev;
2992 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd;
2995 char *oldvdpath, *newvdpath;
2999 txg = spa_vdev_enter(spa);
3001 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE);
3004 return (spa_vdev_exit(spa, NULL, txg, ENODEV));
3006 if (!oldvd->vdev_ops->vdev_op_leaf)
3007 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
3009 pvd = oldvd->vdev_parent;
3011 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0,
3012 VDEV_ALLOC_ADD)) != 0)
3013 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
3015 if (newrootvd->vdev_children != 1)
3016 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
3018 newvd = newrootvd->vdev_child[0];
3020 if (!newvd->vdev_ops->vdev_op_leaf)
3021 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
3023 if ((error = vdev_create(newrootvd, txg, replacing)) != 0)
3024 return (spa_vdev_exit(spa, newrootvd, txg, error));
3027 * Spares can't replace logs
3029 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare)
3030 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
3034 * For attach, the only allowable parent is a mirror or the root
3037 if (pvd->vdev_ops != &vdev_mirror_ops &&
3038 pvd->vdev_ops != &vdev_root_ops)
3039 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
3041 pvops = &vdev_mirror_ops;
3044 * Active hot spares can only be replaced by inactive hot
3047 if (pvd->vdev_ops == &vdev_spare_ops &&
3048 pvd->vdev_child[1] == oldvd &&
3049 !spa_has_spare(spa, newvd->vdev_guid))
3050 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
3053 * If the source is a hot spare, and the parent isn't already a
3054 * spare, then we want to create a new hot spare. Otherwise, we
3055 * want to create a replacing vdev. The user is not allowed to
3056 * attach to a spared vdev child unless the 'isspare' state is
3057 * the same (spare replaces spare, non-spare replaces
3060 if (pvd->vdev_ops == &vdev_replacing_ops)
3061 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
3062 else if (pvd->vdev_ops == &vdev_spare_ops &&
3063 newvd->vdev_isspare != oldvd->vdev_isspare)
3064 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
3065 else if (pvd->vdev_ops != &vdev_spare_ops &&
3066 newvd->vdev_isspare)
3067 pvops = &vdev_spare_ops;
3069 pvops = &vdev_replacing_ops;
3073 * Make sure the new device is big enough.
3075 if (newvd->vdev_asize < vdev_get_min_asize(oldvd))
3076 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW));
3079 * The new device cannot have a higher alignment requirement
3080 * than the top-level vdev.
3082 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift)
3083 return (spa_vdev_exit(spa, newrootvd, txg, EDOM));
3086 * If this is an in-place replacement, update oldvd's path and devid
3087 * to make it distinguishable from newvd, and unopenable from now on.
3089 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) {
3090 spa_strfree(oldvd->vdev_path);
3091 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5,
3093 (void) sprintf(oldvd->vdev_path, "%s/%s",
3094 newvd->vdev_path, "old");
3095 if (oldvd->vdev_devid != NULL) {
3096 spa_strfree(oldvd->vdev_devid);
3097 oldvd->vdev_devid = NULL;
3102 * If the parent is not a mirror, or if we're replacing, insert the new
3103 * mirror/replacing/spare vdev above oldvd.
3105 if (pvd->vdev_ops != pvops)
3106 pvd = vdev_add_parent(oldvd, pvops);
3108 ASSERT(pvd->vdev_top->vdev_parent == rvd);
3109 ASSERT(pvd->vdev_ops == pvops);
3110 ASSERT(oldvd->vdev_parent == pvd);
3113 * Extract the new device from its root and add it to pvd.
3115 vdev_remove_child(newrootvd, newvd);
3116 newvd->vdev_id = pvd->vdev_children;
3117 vdev_add_child(pvd, newvd);
3119 tvd = newvd->vdev_top;
3120 ASSERT(pvd->vdev_top == tvd);
3121 ASSERT(tvd->vdev_parent == rvd);
3123 vdev_config_dirty(tvd);
3126 * Set newvd's DTL to [TXG_INITIAL, open_txg]. It will propagate
3127 * upward when spa_vdev_exit() calls vdev_dtl_reassess().
3129 open_txg = txg + TXG_CONCURRENT_STATES - 1;
3131 vdev_dtl_dirty(newvd, DTL_MISSING,
3132 TXG_INITIAL, open_txg - TXG_INITIAL + 1);
3134 if (newvd->vdev_isspare) {
3135 spa_spare_activate(newvd);
3136 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE);
3139 oldvdpath = spa_strdup(oldvd->vdev_path);
3140 newvdpath = spa_strdup(newvd->vdev_path);
3141 newvd_isspare = newvd->vdev_isspare;
3144 * Mark newvd's DTL dirty in this txg.
3146 vdev_dirty(tvd, VDD_DTL, newvd, txg);
3148 (void) spa_vdev_exit(spa, newrootvd, open_txg, 0);
3150 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
3151 if (dmu_tx_assign(tx, TXG_WAIT) == 0) {
3152 spa_history_internal_log(LOG_POOL_VDEV_ATTACH, spa, tx,
3153 CRED(), "%s vdev=%s %s vdev=%s",
3154 replacing && newvd_isspare ? "spare in" :
3155 replacing ? "replace" : "attach", newvdpath,
3156 replacing ? "for" : "to", oldvdpath);
3162 spa_strfree(oldvdpath);
3163 spa_strfree(newvdpath);
3166 * Kick off a resilver to update newvd.
3168 VERIFY3U(spa_scrub(spa, POOL_SCRUB_RESILVER), ==, 0);
3174 * Detach a device from a mirror or replacing vdev.
3175 * If 'replace_done' is specified, only detach if the parent
3176 * is a replacing vdev.
3179 spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done)
3183 vdev_t *rvd = spa->spa_root_vdev;
3184 vdev_t *vd, *pvd, *cvd, *tvd;
3185 boolean_t unspare = B_FALSE;
3186 uint64_t unspare_guid;
3189 txg = spa_vdev_enter(spa);
3191 vd = spa_lookup_by_guid(spa, guid, B_FALSE);
3194 return (spa_vdev_exit(spa, NULL, txg, ENODEV));
3196 if (!vd->vdev_ops->vdev_op_leaf)
3197 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
3199 pvd = vd->vdev_parent;
3202 * If the parent/child relationship is not as expected, don't do it.
3203 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
3204 * vdev that's replacing B with C. The user's intent in replacing
3205 * is to go from M(A,B) to M(A,C). If the user decides to cancel
3206 * the replace by detaching C, the expected behavior is to end up
3207 * M(A,B). But suppose that right after deciding to detach C,
3208 * the replacement of B completes. We would have M(A,C), and then
3209 * ask to detach C, which would leave us with just A -- not what
3210 * the user wanted. To prevent this, we make sure that the
3211 * parent/child relationship hasn't changed -- in this example,
3212 * that C's parent is still the replacing vdev R.
3214 if (pvd->vdev_guid != pguid && pguid != 0)
3215 return (spa_vdev_exit(spa, NULL, txg, EBUSY));
3218 * If replace_done is specified, only remove this device if it's
3219 * the first child of a replacing vdev. For the 'spare' vdev, either
3220 * disk can be removed.
3223 if (pvd->vdev_ops == &vdev_replacing_ops) {
3224 if (vd->vdev_id != 0)
3225 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
3226 } else if (pvd->vdev_ops != &vdev_spare_ops) {
3227 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
3231 ASSERT(pvd->vdev_ops != &vdev_spare_ops ||
3232 spa_version(spa) >= SPA_VERSION_SPARES);
3235 * Only mirror, replacing, and spare vdevs support detach.
3237 if (pvd->vdev_ops != &vdev_replacing_ops &&
3238 pvd->vdev_ops != &vdev_mirror_ops &&
3239 pvd->vdev_ops != &vdev_spare_ops)
3240 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
3243 * If this device has the only valid copy of some data,
3244 * we cannot safely detach it.
3246 if (vdev_dtl_required(vd))
3247 return (spa_vdev_exit(spa, NULL, txg, EBUSY));
3249 ASSERT(pvd->vdev_children >= 2);
3252 * If we are detaching the second disk from a replacing vdev, then
3253 * check to see if we changed the original vdev's path to have "/old"
3254 * at the end in spa_vdev_attach(). If so, undo that change now.
3256 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id == 1 &&
3257 pvd->vdev_child[0]->vdev_path != NULL &&
3258 pvd->vdev_child[1]->vdev_path != NULL) {
3259 ASSERT(pvd->vdev_child[1] == vd);
3260 cvd = pvd->vdev_child[0];
3261 len = strlen(vd->vdev_path);
3262 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 &&
3263 strcmp(cvd->vdev_path + len, "/old") == 0) {
3264 spa_strfree(cvd->vdev_path);
3265 cvd->vdev_path = spa_strdup(vd->vdev_path);
3270 * If we are detaching the original disk from a spare, then it implies
3271 * that the spare should become a real disk, and be removed from the
3272 * active spare list for the pool.
3274 if (pvd->vdev_ops == &vdev_spare_ops &&
3275 vd->vdev_id == 0 && pvd->vdev_child[1]->vdev_isspare)
3279 * Erase the disk labels so the disk can be used for other things.
3280 * This must be done after all other error cases are handled,
3281 * but before we disembowel vd (so we can still do I/O to it).
3282 * But if we can't do it, don't treat the error as fatal --
3283 * it may be that the unwritability of the disk is the reason
3284 * it's being detached!
3286 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
3289 * Remove vd from its parent and compact the parent's children.
3291 vdev_remove_child(pvd, vd);
3292 vdev_compact_children(pvd);
3295 * Remember one of the remaining children so we can get tvd below.
3297 cvd = pvd->vdev_child[0];
3300 * If we need to remove the remaining child from the list of hot spares,
3301 * do it now, marking the vdev as no longer a spare in the process.
3302 * We must do this before vdev_remove_parent(), because that can
3303 * change the GUID if it creates a new toplevel GUID. For a similar
3304 * reason, we must remove the spare now, in the same txg as the detach;
3305 * otherwise someone could attach a new sibling, change the GUID, and
3306 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
3309 ASSERT(cvd->vdev_isspare);
3310 spa_spare_remove(cvd);
3311 unspare_guid = cvd->vdev_guid;
3312 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE);
3316 * If the parent mirror/replacing vdev only has one child,
3317 * the parent is no longer needed. Remove it from the tree.
3319 if (pvd->vdev_children == 1)
3320 vdev_remove_parent(cvd);
3323 * We don't set tvd until now because the parent we just removed
3324 * may have been the previous top-level vdev.
3326 tvd = cvd->vdev_top;
3327 ASSERT(tvd->vdev_parent == rvd);
3330 * Reevaluate the parent vdev state.
3332 vdev_propagate_state(cvd);
3335 * If the 'autoexpand' property is set on the pool then automatically
3336 * try to expand the size of the pool. For example if the device we
3337 * just detached was smaller than the others, it may be possible to
3338 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
3339 * first so that we can obtain the updated sizes of the leaf vdevs.
3341 if (spa->spa_autoexpand) {
3343 vdev_expand(tvd, txg);
3346 vdev_config_dirty(tvd);
3349 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
3350 * vd->vdev_detached is set and free vd's DTL object in syncing context.
3351 * But first make sure we're not on any *other* txg's DTL list, to
3352 * prevent vd from being accessed after it's freed.
3354 for (int t = 0; t < TXG_SIZE; t++)
3355 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t);
3356 vd->vdev_detached = B_TRUE;
3357 vdev_dirty(tvd, VDD_DTL, vd, txg);
3359 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE);
3361 error = spa_vdev_exit(spa, vd, txg, 0);
3364 * If this was the removal of the original device in a hot spare vdev,
3365 * then we want to go through and remove the device from the hot spare
3366 * list of every other pool.
3371 mutex_enter(&spa_namespace_lock);
3372 while ((spa = spa_next(spa)) != NULL) {
3373 if (spa->spa_state != POOL_STATE_ACTIVE)
3377 spa_open_ref(spa, FTAG);
3378 mutex_exit(&spa_namespace_lock);
3379 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE);
3380 mutex_enter(&spa_namespace_lock);
3381 spa_close(spa, FTAG);
3383 mutex_exit(&spa_namespace_lock);
3390 spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid)
3392 for (int i = 0; i < count; i++) {
3395 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID,
3398 if (guid == target_guid)
3406 spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count,
3407 nvlist_t *dev_to_remove)
3409 nvlist_t **newdev = NULL;
3412 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP);
3414 for (int i = 0, j = 0; i < count; i++) {
3415 if (dev[i] == dev_to_remove)
3417 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0);
3420 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0);
3421 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0);
3423 for (int i = 0; i < count - 1; i++)
3424 nvlist_free(newdev[i]);
3427 kmem_free(newdev, (count - 1) * sizeof (void *));
3431 * Remove a device from the pool. Currently, this supports removing only hot
3432 * spares and level 2 ARC devices.
3435 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare)
3438 nvlist_t **spares, **l2cache, *nv;
3439 uint_t nspares, nl2cache;
3442 boolean_t locked = MUTEX_HELD(&spa_namespace_lock);
3445 txg = spa_vdev_enter(spa);
3447 vd = spa_lookup_by_guid(spa, guid, B_FALSE);
3449 if (spa->spa_spares.sav_vdevs != NULL &&
3450 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
3451 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 &&
3452 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) {
3454 * Only remove the hot spare if it's not currently in use
3457 if (vd == NULL || unspare) {
3458 spa_vdev_remove_aux(spa->spa_spares.sav_config,
3459 ZPOOL_CONFIG_SPARES, spares, nspares, nv);
3460 spa_load_spares(spa);
3461 spa->spa_spares.sav_sync = B_TRUE;
3465 } else if (spa->spa_l2cache.sav_vdevs != NULL &&
3466 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
3467 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 &&
3468 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) {
3470 * Cache devices can always be removed.
3472 spa_vdev_remove_aux(spa->spa_l2cache.sav_config,
3473 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv);
3474 spa_load_l2cache(spa);
3475 spa->spa_l2cache.sav_sync = B_TRUE;
3476 } else if (vd != NULL) {
3478 * Normal vdevs cannot be removed (yet).
3483 * There is no vdev of any kind with the specified guid.
3489 return (spa_vdev_exit(spa, NULL, txg, error));
3495 * Find any device that's done replacing, or a vdev marked 'unspare' that's
3496 * current spared, so we can detach it.
3499 spa_vdev_resilver_done_hunt(vdev_t *vd)
3501 vdev_t *newvd, *oldvd;
3503 for (int c = 0; c < vd->vdev_children; c++) {
3504 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]);
3510 * Check for a completed replacement.
3512 if (vd->vdev_ops == &vdev_replacing_ops && vd->vdev_children == 2) {
3513 oldvd = vd->vdev_child[0];
3514 newvd = vd->vdev_child[1];
3516 if (vdev_dtl_empty(newvd, DTL_MISSING) &&
3517 !vdev_dtl_required(oldvd))
3522 * Check for a completed resilver with the 'unspare' flag set.
3524 if (vd->vdev_ops == &vdev_spare_ops && vd->vdev_children == 2) {
3525 newvd = vd->vdev_child[0];
3526 oldvd = vd->vdev_child[1];
3528 if (newvd->vdev_unspare &&
3529 vdev_dtl_empty(newvd, DTL_MISSING) &&
3530 !vdev_dtl_required(oldvd)) {
3531 newvd->vdev_unspare = 0;
3540 spa_vdev_resilver_done(spa_t *spa)
3542 vdev_t *vd, *pvd, *ppvd;
3543 uint64_t guid, sguid, pguid, ppguid;
3545 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3547 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) {
3548 pvd = vd->vdev_parent;
3549 ppvd = pvd->vdev_parent;
3550 guid = vd->vdev_guid;
3551 pguid = pvd->vdev_guid;
3552 ppguid = ppvd->vdev_guid;
3555 * If we have just finished replacing a hot spared device, then
3556 * we need to detach the parent's first child (the original hot
3559 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0) {
3560 ASSERT(pvd->vdev_ops == &vdev_replacing_ops);
3561 ASSERT(ppvd->vdev_children == 2);
3562 sguid = ppvd->vdev_child[1]->vdev_guid;
3564 spa_config_exit(spa, SCL_ALL, FTAG);
3565 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0)
3567 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0)
3569 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3572 spa_config_exit(spa, SCL_ALL, FTAG);
3576 * Update the stored path or FRU for this vdev. Dirty the vdev configuration,
3577 * relying on spa_vdev_enter/exit() to synchronize the labels and cache.
3580 spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value,
3586 txg = spa_vdev_enter(spa);
3588 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
3589 return (spa_vdev_exit(spa, NULL, txg, ENOENT));
3591 if (!vd->vdev_ops->vdev_op_leaf)
3592 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
3595 spa_strfree(vd->vdev_path);
3596 vd->vdev_path = spa_strdup(value);
3598 if (vd->vdev_fru != NULL)
3599 spa_strfree(vd->vdev_fru);
3600 vd->vdev_fru = spa_strdup(value);
3603 vdev_config_dirty(vd->vdev_top);
3605 return (spa_vdev_exit(spa, NULL, txg, 0));
3609 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath)
3611 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE));
3615 spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru)
3617 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE));
3621 * ==========================================================================
3623 * ==========================================================================
3627 spa_scrub(spa_t *spa, pool_scrub_type_t type)
3629 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
3631 if ((uint_t)type >= POOL_SCRUB_TYPES)
3635 * If a resilver was requested, but there is no DTL on a
3636 * writeable leaf device, we have nothing to do.
3638 if (type == POOL_SCRUB_RESILVER &&
3639 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) {
3640 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE);
3644 if (type == POOL_SCRUB_EVERYTHING &&
3645 spa->spa_dsl_pool->dp_scrub_func != SCRUB_FUNC_NONE &&
3646 spa->spa_dsl_pool->dp_scrub_isresilver)
3649 if (type == POOL_SCRUB_EVERYTHING || type == POOL_SCRUB_RESILVER) {
3650 return (dsl_pool_scrub_clean(spa->spa_dsl_pool));
3651 } else if (type == POOL_SCRUB_NONE) {
3652 return (dsl_pool_scrub_cancel(spa->spa_dsl_pool));
3659 * ==========================================================================
3660 * SPA async task processing
3661 * ==========================================================================
3665 spa_async_remove(spa_t *spa, vdev_t *vd)
3667 if (vd->vdev_remove_wanted) {
3668 vd->vdev_remove_wanted = 0;
3669 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE);
3670 vdev_clear(spa, vd);
3671 vdev_state_dirty(vd->vdev_top);
3674 for (int c = 0; c < vd->vdev_children; c++)
3675 spa_async_remove(spa, vd->vdev_child[c]);
3679 spa_async_probe(spa_t *spa, vdev_t *vd)
3681 if (vd->vdev_probe_wanted) {
3682 vd->vdev_probe_wanted = 0;
3683 vdev_reopen(vd); /* vdev_open() does the actual probe */
3686 for (int c = 0; c < vd->vdev_children; c++)
3687 spa_async_probe(spa, vd->vdev_child[c]);
3691 spa_async_autoexpand(spa_t *spa, vdev_t *vd)
3697 if (!spa->spa_autoexpand)
3700 for (int c = 0; c < vd->vdev_children; c++) {
3701 vdev_t *cvd = vd->vdev_child[c];
3702 spa_async_autoexpand(spa, cvd);
3705 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL)
3708 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
3709 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath);
3711 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3712 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0);
3714 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS,
3715 ESC_DEV_DLE, attr, &eid, DDI_SLEEP);
3718 kmem_free(physpath, MAXPATHLEN);
3722 spa_async_thread(spa_t *spa)
3726 ASSERT(spa->spa_sync_on);
3728 mutex_enter(&spa->spa_async_lock);
3729 tasks = spa->spa_async_tasks;
3730 spa->spa_async_tasks = 0;
3731 mutex_exit(&spa->spa_async_lock);
3734 * See if the config needs to be updated.
3736 if (tasks & SPA_ASYNC_CONFIG_UPDATE) {
3737 uint64_t oldsz, space_update;
3739 mutex_enter(&spa_namespace_lock);
3740 oldsz = spa_get_space(spa);
3741 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
3742 space_update = spa_get_space(spa) - oldsz;
3743 mutex_exit(&spa_namespace_lock);
3746 * If the pool grew as a result of the config update,
3747 * then log an internal history event.
3752 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
3753 if (dmu_tx_assign(tx, TXG_WAIT) == 0) {
3754 spa_history_internal_log(LOG_POOL_VDEV_ONLINE,
3756 "pool '%s' size: %llu(+%llu)",
3757 spa_name(spa), spa_get_space(spa),
3767 * See if any devices need to be marked REMOVED.
3769 if (tasks & SPA_ASYNC_REMOVE) {
3770 spa_vdev_state_enter(spa);
3771 spa_async_remove(spa, spa->spa_root_vdev);
3772 for (int i = 0; i < spa->spa_l2cache.sav_count; i++)
3773 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]);
3774 for (int i = 0; i < spa->spa_spares.sav_count; i++)
3775 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]);
3776 (void) spa_vdev_state_exit(spa, NULL, 0);
3779 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) {
3780 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3781 spa_async_autoexpand(spa, spa->spa_root_vdev);
3782 spa_config_exit(spa, SCL_CONFIG, FTAG);
3786 * See if any devices need to be probed.
3788 if (tasks & SPA_ASYNC_PROBE) {
3789 spa_vdev_state_enter(spa);
3790 spa_async_probe(spa, spa->spa_root_vdev);
3791 (void) spa_vdev_state_exit(spa, NULL, 0);
3795 * If any devices are done replacing, detach them.
3797 if (tasks & SPA_ASYNC_RESILVER_DONE)
3798 spa_vdev_resilver_done(spa);
3801 * Kick off a resilver.
3803 if (tasks & SPA_ASYNC_RESILVER)
3804 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER) == 0);
3807 * Let the world know that we're done.
3809 mutex_enter(&spa->spa_async_lock);
3810 spa->spa_async_thread = NULL;
3811 cv_broadcast(&spa->spa_async_cv);
3812 mutex_exit(&spa->spa_async_lock);
3817 spa_async_suspend(spa_t *spa)
3819 mutex_enter(&spa->spa_async_lock);
3820 spa->spa_async_suspended++;
3821 while (spa->spa_async_thread != NULL)
3822 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock);
3823 mutex_exit(&spa->spa_async_lock);
3827 spa_async_resume(spa_t *spa)
3829 mutex_enter(&spa->spa_async_lock);
3830 ASSERT(spa->spa_async_suspended != 0);
3831 spa->spa_async_suspended--;
3832 mutex_exit(&spa->spa_async_lock);
3836 spa_async_dispatch(spa_t *spa)
3838 mutex_enter(&spa->spa_async_lock);
3839 if (spa->spa_async_tasks && !spa->spa_async_suspended &&
3840 spa->spa_async_thread == NULL &&
3841 rootdir != NULL && !vn_is_readonly(rootdir))
3842 spa->spa_async_thread = thread_create(NULL, 0,
3843 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri);
3844 mutex_exit(&spa->spa_async_lock);
3848 spa_async_request(spa_t *spa, int task)
3850 mutex_enter(&spa->spa_async_lock);
3851 spa->spa_async_tasks |= task;
3852 mutex_exit(&spa->spa_async_lock);
3856 * ==========================================================================
3857 * SPA syncing routines
3858 * ==========================================================================
3862 spa_sync_deferred_frees(spa_t *spa, uint64_t txg)
3864 bplist_t *bpl = &spa->spa_sync_bplist;
3872 zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CANFAIL);
3874 while (bplist_iterate(bpl, &itor, &blk) == 0) {
3875 ASSERT(blk.blk_birth < txg);
3876 zio_nowait(zio_free(zio, spa, txg, &blk, NULL, NULL,
3877 ZIO_FLAG_MUSTSUCCEED));
3880 error = zio_wait(zio);
3881 ASSERT3U(error, ==, 0);
3883 tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg);
3884 bplist_vacate(bpl, tx);
3887 * Pre-dirty the first block so we sync to convergence faster.
3888 * (Usually only the first block is needed.)
3890 dmu_write(spa->spa_meta_objset, spa->spa_sync_bplist_obj, 0, 1, &c, tx);
3895 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx)
3897 char *packed = NULL;
3902 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0);
3905 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
3906 * information. This avoids the dbuf_will_dirty() path and
3907 * saves us a pre-read to get data we don't actually care about.
3909 bufsize = P2ROUNDUP(nvsize, SPA_CONFIG_BLOCKSIZE);
3910 packed = kmem_alloc(bufsize, KM_SLEEP);
3912 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR,
3914 bzero(packed + nvsize, bufsize - nvsize);
3916 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx);
3918 kmem_free(packed, bufsize);
3920 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db));
3921 dmu_buf_will_dirty(db, tx);
3922 *(uint64_t *)db->db_data = nvsize;
3923 dmu_buf_rele(db, FTAG);
3927 spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx,
3928 const char *config, const char *entry)
3938 * Update the MOS nvlist describing the list of available devices.
3939 * spa_validate_aux() will have already made sure this nvlist is
3940 * valid and the vdevs are labeled appropriately.
3942 if (sav->sav_object == 0) {
3943 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset,
3944 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE,
3945 sizeof (uint64_t), tx);
3946 VERIFY(zap_update(spa->spa_meta_objset,
3947 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1,
3948 &sav->sav_object, tx) == 0);
3951 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3952 if (sav->sav_count == 0) {
3953 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0);
3955 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
3956 for (i = 0; i < sav->sav_count; i++)
3957 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i],
3958 B_FALSE, B_FALSE, B_TRUE);
3959 VERIFY(nvlist_add_nvlist_array(nvroot, config, list,
3960 sav->sav_count) == 0);
3961 for (i = 0; i < sav->sav_count; i++)
3962 nvlist_free(list[i]);
3963 kmem_free(list, sav->sav_count * sizeof (void *));
3966 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx);
3967 nvlist_free(nvroot);
3969 sav->sav_sync = B_FALSE;
3973 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx)
3977 if (list_is_empty(&spa->spa_config_dirty_list))
3980 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
3982 config = spa_config_generate(spa, spa->spa_root_vdev,
3983 dmu_tx_get_txg(tx), B_FALSE);
3985 spa_config_exit(spa, SCL_STATE, FTAG);
3987 if (spa->spa_config_syncing)
3988 nvlist_free(spa->spa_config_syncing);
3989 spa->spa_config_syncing = config;
3991 spa_sync_nvlist(spa, spa->spa_config_object, config, tx);
3995 * Set zpool properties.
3998 spa_sync_props(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
4001 objset_t *mos = spa->spa_meta_objset;
4002 nvlist_t *nvp = arg2;
4007 const char *propname;
4008 zprop_type_t proptype;
4010 mutex_enter(&spa->spa_props_lock);
4013 while ((elem = nvlist_next_nvpair(nvp, elem))) {
4014 switch (prop = zpool_name_to_prop(nvpair_name(elem))) {
4015 case ZPOOL_PROP_VERSION:
4017 * Only set version for non-zpool-creation cases
4018 * (set/import). spa_create() needs special care
4019 * for version setting.
4021 if (tx->tx_txg != TXG_INITIAL) {
4022 VERIFY(nvpair_value_uint64(elem,
4024 ASSERT(intval <= SPA_VERSION);
4025 ASSERT(intval >= spa_version(spa));
4026 spa->spa_uberblock.ub_version = intval;
4027 vdev_config_dirty(spa->spa_root_vdev);
4031 case ZPOOL_PROP_ALTROOT:
4033 * 'altroot' is a non-persistent property. It should
4034 * have been set temporarily at creation or import time.
4036 ASSERT(spa->spa_root != NULL);
4039 case ZPOOL_PROP_CACHEFILE:
4041 * 'cachefile' is also a non-persisitent property.
4046 * Set pool property values in the poolprops mos object.
4048 if (spa->spa_pool_props_object == 0) {
4049 objset_t *mos = spa->spa_meta_objset;
4051 VERIFY((spa->spa_pool_props_object =
4052 zap_create(mos, DMU_OT_POOL_PROPS,
4053 DMU_OT_NONE, 0, tx)) > 0);
4055 VERIFY(zap_update(mos,
4056 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS,
4057 8, 1, &spa->spa_pool_props_object, tx)
4061 /* normalize the property name */
4062 propname = zpool_prop_to_name(prop);
4063 proptype = zpool_prop_get_type(prop);
4065 if (nvpair_type(elem) == DATA_TYPE_STRING) {
4066 ASSERT(proptype == PROP_TYPE_STRING);
4067 VERIFY(nvpair_value_string(elem, &strval) == 0);
4068 VERIFY(zap_update(mos,
4069 spa->spa_pool_props_object, propname,
4070 1, strlen(strval) + 1, strval, tx) == 0);
4072 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) {
4073 VERIFY(nvpair_value_uint64(elem, &intval) == 0);
4075 if (proptype == PROP_TYPE_INDEX) {
4077 VERIFY(zpool_prop_index_to_string(
4078 prop, intval, &unused) == 0);
4080 VERIFY(zap_update(mos,
4081 spa->spa_pool_props_object, propname,
4082 8, 1, &intval, tx) == 0);
4084 ASSERT(0); /* not allowed */
4088 case ZPOOL_PROP_DELEGATION:
4089 spa->spa_delegation = intval;
4091 case ZPOOL_PROP_BOOTFS:
4092 spa->spa_bootfs = intval;
4094 case ZPOOL_PROP_FAILUREMODE:
4095 spa->spa_failmode = intval;
4097 case ZPOOL_PROP_AUTOEXPAND:
4098 spa->spa_autoexpand = intval;
4099 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND);
4106 /* log internal history if this is not a zpool create */
4107 if (spa_version(spa) >= SPA_VERSION_ZPOOL_HISTORY &&
4108 tx->tx_txg != TXG_INITIAL) {
4109 spa_history_internal_log(LOG_POOL_PROPSET,
4110 spa, tx, cr, "%s %lld %s",
4111 nvpair_name(elem), intval, spa_name(spa));
4115 mutex_exit(&spa->spa_props_lock);
4119 * Sync the specified transaction group. New blocks may be dirtied as
4120 * part of the process, so we iterate until it converges.
4123 spa_sync(spa_t *spa, uint64_t txg)
4125 dsl_pool_t *dp = spa->spa_dsl_pool;
4126 objset_t *mos = spa->spa_meta_objset;
4127 bplist_t *bpl = &spa->spa_sync_bplist;
4128 vdev_t *rvd = spa->spa_root_vdev;
4135 * Lock out configuration changes.
4137 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
4139 spa->spa_syncing_txg = txg;
4140 spa->spa_sync_pass = 0;
4143 * If there are any pending vdev state changes, convert them
4144 * into config changes that go out with this transaction group.
4146 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
4147 while (list_head(&spa->spa_state_dirty_list) != NULL) {
4149 * We need the write lock here because, for aux vdevs,
4150 * calling vdev_config_dirty() modifies sav_config.
4151 * This is ugly and will become unnecessary when we
4152 * eliminate the aux vdev wart by integrating all vdevs
4153 * into the root vdev tree.
4155 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
4156 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER);
4157 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) {
4158 vdev_state_clean(vd);
4159 vdev_config_dirty(vd);
4161 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
4162 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER);
4164 spa_config_exit(spa, SCL_STATE, FTAG);
4166 VERIFY(0 == bplist_open(bpl, mos, spa->spa_sync_bplist_obj));
4168 tx = dmu_tx_create_assigned(dp, txg);
4171 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
4172 * set spa_deflate if we have no raid-z vdevs.
4174 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE &&
4175 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) {
4178 for (i = 0; i < rvd->vdev_children; i++) {
4179 vd = rvd->vdev_child[i];
4180 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE)
4183 if (i == rvd->vdev_children) {
4184 spa->spa_deflate = TRUE;
4185 VERIFY(0 == zap_add(spa->spa_meta_objset,
4186 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
4187 sizeof (uint64_t), 1, &spa->spa_deflate, tx));
4191 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN &&
4192 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) {
4193 dsl_pool_create_origin(dp, tx);
4195 /* Keeping the origin open increases spa_minref */
4196 spa->spa_minref += 3;
4199 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES &&
4200 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) {
4201 dsl_pool_upgrade_clones(dp, tx);
4205 * If anything has changed in this txg, push the deferred frees
4206 * from the previous txg. If not, leave them alone so that we
4207 * don't generate work on an otherwise idle system.
4209 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) ||
4210 !txg_list_empty(&dp->dp_dirty_dirs, txg) ||
4211 !txg_list_empty(&dp->dp_sync_tasks, txg))
4212 spa_sync_deferred_frees(spa, txg);
4215 * Iterate to convergence.
4218 spa->spa_sync_pass++;
4220 spa_sync_config_object(spa, tx);
4221 spa_sync_aux_dev(spa, &spa->spa_spares, tx,
4222 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES);
4223 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx,
4224 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE);
4225 spa_errlog_sync(spa, txg);
4226 dsl_pool_sync(dp, txg);
4229 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) {
4234 bplist_sync(bpl, tx);
4235 } while (dirty_vdevs);
4239 dprintf("txg %llu passes %d\n", txg, spa->spa_sync_pass);
4242 * Rewrite the vdev configuration (which includes the uberblock)
4243 * to commit the transaction group.
4245 * If there are no dirty vdevs, we sync the uberblock to a few
4246 * random top-level vdevs that are known to be visible in the
4247 * config cache (see spa_vdev_add() for a complete description).
4248 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
4252 * We hold SCL_STATE to prevent vdev open/close/etc.
4253 * while we're attempting to write the vdev labels.
4255 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
4257 if (list_is_empty(&spa->spa_config_dirty_list)) {
4258 vdev_t *svd[SPA_DVAS_PER_BP];
4260 int children = rvd->vdev_children;
4261 int c0 = spa_get_random(children);
4263 for (int c = 0; c < children; c++) {
4264 vd = rvd->vdev_child[(c0 + c) % children];
4265 if (vd->vdev_ms_array == 0 || vd->vdev_islog)
4267 svd[svdcount++] = vd;
4268 if (svdcount == SPA_DVAS_PER_BP)
4271 error = vdev_config_sync(svd, svdcount, txg, B_FALSE);
4273 error = vdev_config_sync(svd, svdcount, txg,
4276 error = vdev_config_sync(rvd->vdev_child,
4277 rvd->vdev_children, txg, B_FALSE);
4279 error = vdev_config_sync(rvd->vdev_child,
4280 rvd->vdev_children, txg, B_TRUE);
4283 spa_config_exit(spa, SCL_STATE, FTAG);
4287 zio_suspend(spa, NULL);
4288 zio_resume_wait(spa);
4293 * Clear the dirty config list.
4295 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL)
4296 vdev_config_clean(vd);
4299 * Now that the new config has synced transactionally,
4300 * let it become visible to the config cache.
4302 if (spa->spa_config_syncing != NULL) {
4303 spa_config_set(spa, spa->spa_config_syncing);
4304 spa->spa_config_txg = txg;
4305 spa->spa_config_syncing = NULL;
4308 spa->spa_ubsync = spa->spa_uberblock;
4311 * Clean up the ZIL records for the synced txg.
4313 dsl_pool_zil_clean(dp);
4316 * Update usable space statistics.
4318 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg)))
4319 vdev_sync_done(vd, txg);
4322 * It had better be the case that we didn't dirty anything
4323 * since vdev_config_sync().
4325 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg));
4326 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg));
4327 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg));
4328 ASSERT(bpl->bpl_queue == NULL);
4330 spa_config_exit(spa, SCL_CONFIG, FTAG);
4333 * If any async tasks have been requested, kick them off.
4335 spa_async_dispatch(spa);
4339 * Sync all pools. We don't want to hold the namespace lock across these
4340 * operations, so we take a reference on the spa_t and drop the lock during the
4344 spa_sync_allpools(void)
4347 mutex_enter(&spa_namespace_lock);
4348 while ((spa = spa_next(spa)) != NULL) {
4349 if (spa_state(spa) != POOL_STATE_ACTIVE || spa_suspended(spa))
4351 spa_open_ref(spa, FTAG);
4352 mutex_exit(&spa_namespace_lock);
4353 txg_wait_synced(spa_get_dsl(spa), 0);
4354 mutex_enter(&spa_namespace_lock);
4355 spa_close(spa, FTAG);
4357 mutex_exit(&spa_namespace_lock);
4361 * ==========================================================================
4362 * Miscellaneous routines
4363 * ==========================================================================
4367 * Remove all pools in the system.
4375 * Remove all cached state. All pools should be closed now,
4376 * so every spa in the AVL tree should be unreferenced.
4378 mutex_enter(&spa_namespace_lock);
4379 while ((spa = spa_next(NULL)) != NULL) {
4381 * Stop async tasks. The async thread may need to detach
4382 * a device that's been replaced, which requires grabbing
4383 * spa_namespace_lock, so we must drop it here.
4385 spa_open_ref(spa, FTAG);
4386 mutex_exit(&spa_namespace_lock);
4387 spa_async_suspend(spa);
4388 mutex_enter(&spa_namespace_lock);
4389 spa_close(spa, FTAG);
4391 if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
4393 spa_deactivate(spa);
4397 mutex_exit(&spa_namespace_lock);
4401 spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux)
4406 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL)
4410 for (i = 0; i < spa->spa_l2cache.sav_count; i++) {
4411 vd = spa->spa_l2cache.sav_vdevs[i];
4412 if (vd->vdev_guid == guid)
4416 for (i = 0; i < spa->spa_spares.sav_count; i++) {
4417 vd = spa->spa_spares.sav_vdevs[i];
4418 if (vd->vdev_guid == guid)
4427 spa_upgrade(spa_t *spa, uint64_t version)
4429 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4432 * This should only be called for a non-faulted pool, and since a
4433 * future version would result in an unopenable pool, this shouldn't be
4436 ASSERT(spa->spa_uberblock.ub_version <= SPA_VERSION);
4437 ASSERT(version >= spa->spa_uberblock.ub_version);
4439 spa->spa_uberblock.ub_version = version;
4440 vdev_config_dirty(spa->spa_root_vdev);
4442 spa_config_exit(spa, SCL_ALL, FTAG);
4444 txg_wait_synced(spa_get_dsl(spa), 0);
4448 spa_has_spare(spa_t *spa, uint64_t guid)
4452 spa_aux_vdev_t *sav = &spa->spa_spares;
4454 for (i = 0; i < sav->sav_count; i++)
4455 if (sav->sav_vdevs[i]->vdev_guid == guid)
4458 for (i = 0; i < sav->sav_npending; i++) {
4459 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID,
4460 &spareguid) == 0 && spareguid == guid)
4468 * Check if a pool has an active shared spare device.
4469 * Note: reference count of an active spare is 2, as a spare and as a replace
4472 spa_has_active_shared_spare(spa_t *spa)
4476 spa_aux_vdev_t *sav = &spa->spa_spares;
4478 for (i = 0; i < sav->sav_count; i++) {
4479 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool,
4480 &refcnt) && pool != 0ULL && pool == spa_guid(spa) &&
4489 * Post a sysevent corresponding to the given event. The 'name' must be one of
4490 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
4491 * filled in from the spa and (optionally) the vdev. This doesn't do anything
4492 * in the userland libzpool, as we don't want consumers to misinterpret ztest
4493 * or zdb as real changes.
4496 spa_event_notify(spa_t *spa, vdev_t *vd, const char *name)
4500 sysevent_attr_list_t *attr = NULL;
4501 sysevent_value_t value;
4504 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs",
4507 value.value_type = SE_DATA_TYPE_STRING;
4508 value.value.sv_string = spa_name(spa);
4509 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0)
4512 value.value_type = SE_DATA_TYPE_UINT64;
4513 value.value.sv_uint64 = spa_guid(spa);
4514 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0)
4518 value.value_type = SE_DATA_TYPE_UINT64;
4519 value.value.sv_uint64 = vd->vdev_guid;
4520 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value,
4524 if (vd->vdev_path) {
4525 value.value_type = SE_DATA_TYPE_STRING;
4526 value.value.sv_string = vd->vdev_path;
4527 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH,
4528 &value, SE_SLEEP) != 0)
4533 if (sysevent_attach_attributes(ev, attr) != 0)
4537 (void) log_sysevent(ev, SE_SLEEP, &eid);
4541 sysevent_free_attr(attr);