4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2013 by Delphix. All rights reserved.
25 * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
30 * SPA: Storage Pool Allocator
32 * This file contains all the routines used when modifying on-disk SPA state.
33 * This includes opening, importing, destroying, exporting a pool, and syncing a
37 #include <sys/zfs_context.h>
38 #include <sys/fm/fs/zfs.h>
39 #include <sys/spa_impl.h>
41 #include <sys/zio_checksum.h>
43 #include <sys/dmu_tx.h>
47 #include <sys/vdev_impl.h>
48 #include <sys/metaslab.h>
49 #include <sys/metaslab_impl.h>
50 #include <sys/uberblock_impl.h>
53 #include <sys/dmu_traverse.h>
54 #include <sys/dmu_objset.h>
55 #include <sys/unique.h>
56 #include <sys/dsl_pool.h>
57 #include <sys/dsl_dataset.h>
58 #include <sys/dsl_dir.h>
59 #include <sys/dsl_prop.h>
60 #include <sys/dsl_synctask.h>
61 #include <sys/fs/zfs.h>
63 #include <sys/callb.h>
64 #include <sys/spa_boot.h>
65 #include <sys/zfs_ioctl.h>
66 #include <sys/dsl_scan.h>
67 #include <sys/dmu_send.h>
68 #include <sys/dsl_destroy.h>
69 #include <sys/dsl_userhold.h>
70 #include <sys/zfeature.h>
72 #include <sys/trim_map.h>
75 #include <sys/callb.h>
76 #include <sys/cpupart.h>
81 #include "zfs_comutil.h"
83 /* Check hostid on import? */
84 static int check_hostid = 1;
86 SYSCTL_DECL(_vfs_zfs);
87 TUNABLE_INT("vfs.zfs.check_hostid", &check_hostid);
88 SYSCTL_INT(_vfs_zfs, OID_AUTO, check_hostid, CTLFLAG_RW, &check_hostid, 0,
89 "Check hostid on import?");
92 * The interval, in seconds, at which failed configuration cache file writes
95 static int zfs_ccw_retry_interval = 300;
97 typedef enum zti_modes {
98 ZTI_MODE_FIXED, /* value is # of threads (min 1) */
99 ZTI_MODE_BATCH, /* cpu-intensive; value is ignored */
100 ZTI_MODE_NULL, /* don't create a taskq */
104 #define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) }
105 #define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 }
106 #define ZTI_NULL { ZTI_MODE_NULL, 0, 0 }
108 #define ZTI_N(n) ZTI_P(n, 1)
109 #define ZTI_ONE ZTI_N(1)
111 typedef struct zio_taskq_info {
112 zti_modes_t zti_mode;
117 static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = {
118 "issue", "issue_high", "intr", "intr_high"
122 * This table defines the taskq settings for each ZFS I/O type. When
123 * initializing a pool, we use this table to create an appropriately sized
124 * taskq. Some operations are low volume and therefore have a small, static
125 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE
126 * macros. Other operations process a large amount of data; the ZTI_BATCH
127 * macro causes us to create a taskq oriented for throughput. Some operations
128 * are so high frequency and short-lived that the taskq itself can become a a
129 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an
130 * additional degree of parallelism specified by the number of threads per-
131 * taskq and the number of taskqs; when dispatching an event in this case, the
132 * particular taskq is chosen at random.
134 * The different taskq priorities are to handle the different contexts (issue
135 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that
136 * need to be handled with minimum delay.
138 const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = {
139 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */
140 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* NULL */
141 { ZTI_N(8), ZTI_NULL, ZTI_BATCH, ZTI_NULL }, /* READ */
142 { ZTI_BATCH, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */
143 { ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */
144 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */
145 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */
148 static void spa_sync_version(void *arg, dmu_tx_t *tx);
149 static void spa_sync_props(void *arg, dmu_tx_t *tx);
150 static boolean_t spa_has_active_shared_spare(spa_t *spa);
151 static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config,
152 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig,
154 static void spa_vdev_resilver_done(spa_t *spa);
156 uint_t zio_taskq_batch_pct = 75; /* 1 thread per cpu in pset */
158 id_t zio_taskq_psrset_bind = PS_NONE;
161 boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */
163 uint_t zio_taskq_basedc = 80; /* base duty cycle */
165 boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */
166 extern int zfs_sync_pass_deferred_free;
169 extern void spa_deadman(void *arg);
173 * This (illegal) pool name is used when temporarily importing a spa_t in order
174 * to get the vdev stats associated with the imported devices.
176 #define TRYIMPORT_NAME "$import"
179 * ==========================================================================
180 * SPA properties routines
181 * ==========================================================================
185 * Add a (source=src, propname=propval) list to an nvlist.
188 spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval,
189 uint64_t intval, zprop_source_t src)
191 const char *propname = zpool_prop_to_name(prop);
194 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
195 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0);
198 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0);
200 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0);
202 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0);
203 nvlist_free(propval);
207 * Get property values from the spa configuration.
210 spa_prop_get_config(spa_t *spa, nvlist_t **nvp)
212 vdev_t *rvd = spa->spa_root_vdev;
213 dsl_pool_t *pool = spa->spa_dsl_pool;
217 uint64_t cap, version;
218 zprop_source_t src = ZPROP_SRC_NONE;
219 spa_config_dirent_t *dp;
221 ASSERT(MUTEX_HELD(&spa->spa_props_lock));
224 alloc = metaslab_class_get_alloc(spa_normal_class(spa));
225 size = metaslab_class_get_space(spa_normal_class(spa));
226 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src);
227 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src);
228 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src);
229 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL,
233 for (int c = 0; c < rvd->vdev_children; c++) {
234 vdev_t *tvd = rvd->vdev_child[c];
235 space += tvd->vdev_max_asize - tvd->vdev_asize;
237 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, space,
240 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL,
241 (spa_mode(spa) == FREAD), src);
243 cap = (size == 0) ? 0 : (alloc * 100 / size);
244 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src);
246 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL,
247 ddt_get_pool_dedup_ratio(spa), src);
249 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL,
250 rvd->vdev_state, src);
252 version = spa_version(spa);
253 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION))
254 src = ZPROP_SRC_DEFAULT;
256 src = ZPROP_SRC_LOCAL;
257 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src);
261 dsl_dir_t *freedir = pool->dp_free_dir;
264 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS,
265 * when opening pools before this version freedir will be NULL.
267 if (freedir != NULL) {
268 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL,
269 freedir->dd_phys->dd_used_bytes, src);
271 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING,
276 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src);
278 if (spa->spa_comment != NULL) {
279 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment,
283 if (spa->spa_root != NULL)
284 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root,
287 if ((dp = list_head(&spa->spa_config_list)) != NULL) {
288 if (dp->scd_path == NULL) {
289 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
290 "none", 0, ZPROP_SRC_LOCAL);
291 } else if (strcmp(dp->scd_path, spa_config_path) != 0) {
292 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
293 dp->scd_path, 0, ZPROP_SRC_LOCAL);
299 * Get zpool property values.
302 spa_prop_get(spa_t *spa, nvlist_t **nvp)
304 objset_t *mos = spa->spa_meta_objset;
309 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
311 mutex_enter(&spa->spa_props_lock);
314 * Get properties from the spa config.
316 spa_prop_get_config(spa, nvp);
318 /* If no pool property object, no more prop to get. */
319 if (mos == NULL || spa->spa_pool_props_object == 0) {
320 mutex_exit(&spa->spa_props_lock);
325 * Get properties from the MOS pool property object.
327 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object);
328 (err = zap_cursor_retrieve(&zc, &za)) == 0;
329 zap_cursor_advance(&zc)) {
332 zprop_source_t src = ZPROP_SRC_DEFAULT;
335 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL)
338 switch (za.za_integer_length) {
340 /* integer property */
341 if (za.za_first_integer !=
342 zpool_prop_default_numeric(prop))
343 src = ZPROP_SRC_LOCAL;
345 if (prop == ZPOOL_PROP_BOOTFS) {
347 dsl_dataset_t *ds = NULL;
349 dp = spa_get_dsl(spa);
350 dsl_pool_config_enter(dp, FTAG);
351 if (err = dsl_dataset_hold_obj(dp,
352 za.za_first_integer, FTAG, &ds)) {
353 dsl_pool_config_exit(dp, FTAG);
358 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1,
360 dsl_dataset_name(ds, strval);
361 dsl_dataset_rele(ds, FTAG);
362 dsl_pool_config_exit(dp, FTAG);
365 intval = za.za_first_integer;
368 spa_prop_add_list(*nvp, prop, strval, intval, src);
372 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1);
377 /* string property */
378 strval = kmem_alloc(za.za_num_integers, KM_SLEEP);
379 err = zap_lookup(mos, spa->spa_pool_props_object,
380 za.za_name, 1, za.za_num_integers, strval);
382 kmem_free(strval, za.za_num_integers);
385 spa_prop_add_list(*nvp, prop, strval, 0, src);
386 kmem_free(strval, za.za_num_integers);
393 zap_cursor_fini(&zc);
394 mutex_exit(&spa->spa_props_lock);
396 if (err && err != ENOENT) {
406 * Validate the given pool properties nvlist and modify the list
407 * for the property values to be set.
410 spa_prop_validate(spa_t *spa, nvlist_t *props)
413 int error = 0, reset_bootfs = 0;
415 boolean_t has_feature = B_FALSE;
418 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
420 char *strval, *slash, *check, *fname;
421 const char *propname = nvpair_name(elem);
422 zpool_prop_t prop = zpool_name_to_prop(propname);
426 if (!zpool_prop_feature(propname)) {
427 error = SET_ERROR(EINVAL);
432 * Sanitize the input.
434 if (nvpair_type(elem) != DATA_TYPE_UINT64) {
435 error = SET_ERROR(EINVAL);
439 if (nvpair_value_uint64(elem, &intval) != 0) {
440 error = SET_ERROR(EINVAL);
445 error = SET_ERROR(EINVAL);
449 fname = strchr(propname, '@') + 1;
450 if (zfeature_lookup_name(fname, NULL) != 0) {
451 error = SET_ERROR(EINVAL);
455 has_feature = B_TRUE;
458 case ZPOOL_PROP_VERSION:
459 error = nvpair_value_uint64(elem, &intval);
461 (intval < spa_version(spa) ||
462 intval > SPA_VERSION_BEFORE_FEATURES ||
464 error = SET_ERROR(EINVAL);
467 case ZPOOL_PROP_DELEGATION:
468 case ZPOOL_PROP_AUTOREPLACE:
469 case ZPOOL_PROP_LISTSNAPS:
470 case ZPOOL_PROP_AUTOEXPAND:
471 error = nvpair_value_uint64(elem, &intval);
472 if (!error && intval > 1)
473 error = SET_ERROR(EINVAL);
476 case ZPOOL_PROP_BOOTFS:
478 * If the pool version is less than SPA_VERSION_BOOTFS,
479 * or the pool is still being created (version == 0),
480 * the bootfs property cannot be set.
482 if (spa_version(spa) < SPA_VERSION_BOOTFS) {
483 error = SET_ERROR(ENOTSUP);
488 * Make sure the vdev config is bootable
490 if (!vdev_is_bootable(spa->spa_root_vdev)) {
491 error = SET_ERROR(ENOTSUP);
497 error = nvpair_value_string(elem, &strval);
503 if (strval == NULL || strval[0] == '\0') {
504 objnum = zpool_prop_default_numeric(
509 if (error = dmu_objset_hold(strval, FTAG, &os))
512 /* Must be ZPL and not gzip compressed. */
514 if (dmu_objset_type(os) != DMU_OST_ZFS) {
515 error = SET_ERROR(ENOTSUP);
517 dsl_prop_get_int_ds(dmu_objset_ds(os),
518 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
520 !BOOTFS_COMPRESS_VALID(compress)) {
521 error = SET_ERROR(ENOTSUP);
523 objnum = dmu_objset_id(os);
525 dmu_objset_rele(os, FTAG);
529 case ZPOOL_PROP_FAILUREMODE:
530 error = nvpair_value_uint64(elem, &intval);
531 if (!error && (intval < ZIO_FAILURE_MODE_WAIT ||
532 intval > ZIO_FAILURE_MODE_PANIC))
533 error = SET_ERROR(EINVAL);
536 * This is a special case which only occurs when
537 * the pool has completely failed. This allows
538 * the user to change the in-core failmode property
539 * without syncing it out to disk (I/Os might
540 * currently be blocked). We do this by returning
541 * EIO to the caller (spa_prop_set) to trick it
542 * into thinking we encountered a property validation
545 if (!error && spa_suspended(spa)) {
546 spa->spa_failmode = intval;
547 error = SET_ERROR(EIO);
551 case ZPOOL_PROP_CACHEFILE:
552 if ((error = nvpair_value_string(elem, &strval)) != 0)
555 if (strval[0] == '\0')
558 if (strcmp(strval, "none") == 0)
561 if (strval[0] != '/') {
562 error = SET_ERROR(EINVAL);
566 slash = strrchr(strval, '/');
567 ASSERT(slash != NULL);
569 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 ||
570 strcmp(slash, "/..") == 0)
571 error = SET_ERROR(EINVAL);
574 case ZPOOL_PROP_COMMENT:
575 if ((error = nvpair_value_string(elem, &strval)) != 0)
577 for (check = strval; *check != '\0'; check++) {
579 * The kernel doesn't have an easy isprint()
580 * check. For this kernel check, we merely
581 * check ASCII apart from DEL. Fix this if
582 * there is an easy-to-use kernel isprint().
584 if (*check >= 0x7f) {
585 error = SET_ERROR(EINVAL);
589 if (strlen(strval) > ZPROP_MAX_COMMENT)
593 case ZPOOL_PROP_DEDUPDITTO:
594 if (spa_version(spa) < SPA_VERSION_DEDUP)
595 error = SET_ERROR(ENOTSUP);
597 error = nvpair_value_uint64(elem, &intval);
599 intval != 0 && intval < ZIO_DEDUPDITTO_MIN)
600 error = SET_ERROR(EINVAL);
608 if (!error && reset_bootfs) {
609 error = nvlist_remove(props,
610 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING);
613 error = nvlist_add_uint64(props,
614 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum);
622 spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync)
625 spa_config_dirent_t *dp;
627 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE),
631 dp = kmem_alloc(sizeof (spa_config_dirent_t),
634 if (cachefile[0] == '\0')
635 dp->scd_path = spa_strdup(spa_config_path);
636 else if (strcmp(cachefile, "none") == 0)
639 dp->scd_path = spa_strdup(cachefile);
641 list_insert_head(&spa->spa_config_list, dp);
643 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
647 spa_prop_set(spa_t *spa, nvlist_t *nvp)
650 nvpair_t *elem = NULL;
651 boolean_t need_sync = B_FALSE;
653 if ((error = spa_prop_validate(spa, nvp)) != 0)
656 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) {
657 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem));
659 if (prop == ZPOOL_PROP_CACHEFILE ||
660 prop == ZPOOL_PROP_ALTROOT ||
661 prop == ZPOOL_PROP_READONLY)
664 if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) {
667 if (prop == ZPOOL_PROP_VERSION) {
668 VERIFY(nvpair_value_uint64(elem, &ver) == 0);
670 ASSERT(zpool_prop_feature(nvpair_name(elem)));
671 ver = SPA_VERSION_FEATURES;
675 /* Save time if the version is already set. */
676 if (ver == spa_version(spa))
680 * In addition to the pool directory object, we might
681 * create the pool properties object, the features for
682 * read object, the features for write object, or the
683 * feature descriptions object.
685 error = dsl_sync_task(spa->spa_name, NULL,
686 spa_sync_version, &ver, 6);
697 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props,
705 * If the bootfs property value is dsobj, clear it.
708 spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx)
710 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) {
711 VERIFY(zap_remove(spa->spa_meta_objset,
712 spa->spa_pool_props_object,
713 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0);
720 spa_change_guid_check(void *arg, dmu_tx_t *tx)
722 uint64_t *newguid = arg;
723 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
724 vdev_t *rvd = spa->spa_root_vdev;
727 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
728 vdev_state = rvd->vdev_state;
729 spa_config_exit(spa, SCL_STATE, FTAG);
731 if (vdev_state != VDEV_STATE_HEALTHY)
732 return (SET_ERROR(ENXIO));
734 ASSERT3U(spa_guid(spa), !=, *newguid);
740 spa_change_guid_sync(void *arg, dmu_tx_t *tx)
742 uint64_t *newguid = arg;
743 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
745 vdev_t *rvd = spa->spa_root_vdev;
747 oldguid = spa_guid(spa);
749 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
750 rvd->vdev_guid = *newguid;
751 rvd->vdev_guid_sum += (*newguid - oldguid);
752 vdev_config_dirty(rvd);
753 spa_config_exit(spa, SCL_STATE, FTAG);
755 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu",
760 * Change the GUID for the pool. This is done so that we can later
761 * re-import a pool built from a clone of our own vdevs. We will modify
762 * the root vdev's guid, our own pool guid, and then mark all of our
763 * vdevs dirty. Note that we must make sure that all our vdevs are
764 * online when we do this, or else any vdevs that weren't present
765 * would be orphaned from our pool. We are also going to issue a
766 * sysevent to update any watchers.
769 spa_change_guid(spa_t *spa)
774 mutex_enter(&spa->spa_vdev_top_lock);
775 mutex_enter(&spa_namespace_lock);
776 guid = spa_generate_guid(NULL);
778 error = dsl_sync_task(spa->spa_name, spa_change_guid_check,
779 spa_change_guid_sync, &guid, 5);
782 spa_config_sync(spa, B_FALSE, B_TRUE);
783 spa_event_notify(spa, NULL, ESC_ZFS_POOL_REGUID);
786 mutex_exit(&spa_namespace_lock);
787 mutex_exit(&spa->spa_vdev_top_lock);
793 * ==========================================================================
794 * SPA state manipulation (open/create/destroy/import/export)
795 * ==========================================================================
799 spa_error_entry_compare(const void *a, const void *b)
801 spa_error_entry_t *sa = (spa_error_entry_t *)a;
802 spa_error_entry_t *sb = (spa_error_entry_t *)b;
805 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark,
806 sizeof (zbookmark_t));
817 * Utility function which retrieves copies of the current logs and
818 * re-initializes them in the process.
821 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub)
823 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock));
825 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t));
826 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t));
828 avl_create(&spa->spa_errlist_scrub,
829 spa_error_entry_compare, sizeof (spa_error_entry_t),
830 offsetof(spa_error_entry_t, se_avl));
831 avl_create(&spa->spa_errlist_last,
832 spa_error_entry_compare, sizeof (spa_error_entry_t),
833 offsetof(spa_error_entry_t, se_avl));
837 spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q)
839 const zio_taskq_info_t *ztip = &zio_taskqs[t][q];
840 enum zti_modes mode = ztip->zti_mode;
841 uint_t value = ztip->zti_value;
842 uint_t count = ztip->zti_count;
843 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q];
846 boolean_t batch = B_FALSE;
848 if (mode == ZTI_MODE_NULL) {
850 tqs->stqs_taskq = NULL;
854 ASSERT3U(count, >, 0);
856 tqs->stqs_count = count;
857 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP);
861 ASSERT3U(value, >=, 1);
862 value = MAX(value, 1);
867 flags |= TASKQ_THREADS_CPU_PCT;
868 value = zio_taskq_batch_pct;
872 panic("unrecognized mode for %s_%s taskq (%u:%u) in "
874 zio_type_name[t], zio_taskq_types[q], mode, value);
878 for (uint_t i = 0; i < count; i++) {
882 (void) snprintf(name, sizeof (name), "%s_%s_%u",
883 zio_type_name[t], zio_taskq_types[q], i);
885 (void) snprintf(name, sizeof (name), "%s_%s",
886 zio_type_name[t], zio_taskq_types[q]);
890 if (zio_taskq_sysdc && spa->spa_proc != &p0) {
892 flags |= TASKQ_DC_BATCH;
894 tq = taskq_create_sysdc(name, value, 50, INT_MAX,
895 spa->spa_proc, zio_taskq_basedc, flags);
898 pri_t pri = maxclsyspri;
900 * The write issue taskq can be extremely CPU
901 * intensive. Run it at slightly lower priority
902 * than the other taskqs.
904 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE)
907 tq = taskq_create_proc(name, value, pri, 50,
908 INT_MAX, spa->spa_proc, flags);
913 tqs->stqs_taskq[i] = tq;
918 spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q)
920 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q];
922 if (tqs->stqs_taskq == NULL) {
923 ASSERT0(tqs->stqs_count);
927 for (uint_t i = 0; i < tqs->stqs_count; i++) {
928 ASSERT3P(tqs->stqs_taskq[i], !=, NULL);
929 taskq_destroy(tqs->stqs_taskq[i]);
932 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *));
933 tqs->stqs_taskq = NULL;
937 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority.
938 * Note that a type may have multiple discrete taskqs to avoid lock contention
939 * on the taskq itself. In that case we choose which taskq at random by using
940 * the low bits of gethrtime().
943 spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
944 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent)
946 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q];
949 ASSERT3P(tqs->stqs_taskq, !=, NULL);
950 ASSERT3U(tqs->stqs_count, !=, 0);
952 if (tqs->stqs_count == 1) {
953 tq = tqs->stqs_taskq[0];
955 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count];
958 taskq_dispatch_ent(tq, func, arg, flags, ent);
962 spa_create_zio_taskqs(spa_t *spa)
964 for (int t = 0; t < ZIO_TYPES; t++) {
965 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) {
966 spa_taskqs_init(spa, t, q);
974 spa_thread(void *arg)
979 user_t *pu = PTOU(curproc);
981 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr,
984 ASSERT(curproc != &p0);
985 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs),
986 "zpool-%s", spa->spa_name);
987 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm));
990 /* bind this thread to the requested psrset */
991 if (zio_taskq_psrset_bind != PS_NONE) {
993 mutex_enter(&cpu_lock);
994 mutex_enter(&pidlock);
995 mutex_enter(&curproc->p_lock);
997 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind,
998 0, NULL, NULL) == 0) {
999 curthread->t_bind_pset = zio_taskq_psrset_bind;
1002 "Couldn't bind process for zfs pool \"%s\" to "
1003 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind);
1006 mutex_exit(&curproc->p_lock);
1007 mutex_exit(&pidlock);
1008 mutex_exit(&cpu_lock);
1014 if (zio_taskq_sysdc) {
1015 sysdc_thread_enter(curthread, 100, 0);
1019 spa->spa_proc = curproc;
1020 spa->spa_did = curthread->t_did;
1022 spa_create_zio_taskqs(spa);
1024 mutex_enter(&spa->spa_proc_lock);
1025 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED);
1027 spa->spa_proc_state = SPA_PROC_ACTIVE;
1028 cv_broadcast(&spa->spa_proc_cv);
1030 CALLB_CPR_SAFE_BEGIN(&cprinfo);
1031 while (spa->spa_proc_state == SPA_PROC_ACTIVE)
1032 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock);
1033 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock);
1035 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE);
1036 spa->spa_proc_state = SPA_PROC_GONE;
1037 spa->spa_proc = &p0;
1038 cv_broadcast(&spa->spa_proc_cv);
1039 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */
1041 mutex_enter(&curproc->p_lock);
1044 #endif /* SPA_PROCESS */
1048 * Activate an uninitialized pool.
1051 spa_activate(spa_t *spa, int mode)
1053 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED);
1055 spa->spa_state = POOL_STATE_ACTIVE;
1056 spa->spa_mode = mode;
1058 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops);
1059 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops);
1061 /* Try to create a covering process */
1062 mutex_enter(&spa->spa_proc_lock);
1063 ASSERT(spa->spa_proc_state == SPA_PROC_NONE);
1064 ASSERT(spa->spa_proc == &p0);
1068 /* Only create a process if we're going to be around a while. */
1069 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) {
1070 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri,
1072 spa->spa_proc_state = SPA_PROC_CREATED;
1073 while (spa->spa_proc_state == SPA_PROC_CREATED) {
1074 cv_wait(&spa->spa_proc_cv,
1075 &spa->spa_proc_lock);
1077 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE);
1078 ASSERT(spa->spa_proc != &p0);
1079 ASSERT(spa->spa_did != 0);
1083 "Couldn't create process for zfs pool \"%s\"\n",
1088 #endif /* SPA_PROCESS */
1089 mutex_exit(&spa->spa_proc_lock);
1091 /* If we didn't create a process, we need to create our taskqs. */
1092 ASSERT(spa->spa_proc == &p0);
1093 if (spa->spa_proc == &p0) {
1094 spa_create_zio_taskqs(spa);
1098 * Start TRIM thread.
1100 trim_thread_create(spa);
1102 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t),
1103 offsetof(vdev_t, vdev_config_dirty_node));
1104 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t),
1105 offsetof(vdev_t, vdev_state_dirty_node));
1107 txg_list_create(&spa->spa_vdev_txg_list,
1108 offsetof(struct vdev, vdev_txg_node));
1110 avl_create(&spa->spa_errlist_scrub,
1111 spa_error_entry_compare, sizeof (spa_error_entry_t),
1112 offsetof(spa_error_entry_t, se_avl));
1113 avl_create(&spa->spa_errlist_last,
1114 spa_error_entry_compare, sizeof (spa_error_entry_t),
1115 offsetof(spa_error_entry_t, se_avl));
1119 * Opposite of spa_activate().
1122 spa_deactivate(spa_t *spa)
1124 ASSERT(spa->spa_sync_on == B_FALSE);
1125 ASSERT(spa->spa_dsl_pool == NULL);
1126 ASSERT(spa->spa_root_vdev == NULL);
1127 ASSERT(spa->spa_async_zio_root == NULL);
1128 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED);
1131 * Stop TRIM thread in case spa_unload() wasn't called directly
1132 * before spa_deactivate().
1134 trim_thread_destroy(spa);
1136 txg_list_destroy(&spa->spa_vdev_txg_list);
1138 list_destroy(&spa->spa_config_dirty_list);
1139 list_destroy(&spa->spa_state_dirty_list);
1141 for (int t = 0; t < ZIO_TYPES; t++) {
1142 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) {
1143 spa_taskqs_fini(spa, t, q);
1147 metaslab_class_destroy(spa->spa_normal_class);
1148 spa->spa_normal_class = NULL;
1150 metaslab_class_destroy(spa->spa_log_class);
1151 spa->spa_log_class = NULL;
1154 * If this was part of an import or the open otherwise failed, we may
1155 * still have errors left in the queues. Empty them just in case.
1157 spa_errlog_drain(spa);
1159 avl_destroy(&spa->spa_errlist_scrub);
1160 avl_destroy(&spa->spa_errlist_last);
1162 spa->spa_state = POOL_STATE_UNINITIALIZED;
1164 mutex_enter(&spa->spa_proc_lock);
1165 if (spa->spa_proc_state != SPA_PROC_NONE) {
1166 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE);
1167 spa->spa_proc_state = SPA_PROC_DEACTIVATE;
1168 cv_broadcast(&spa->spa_proc_cv);
1169 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) {
1170 ASSERT(spa->spa_proc != &p0);
1171 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock);
1173 ASSERT(spa->spa_proc_state == SPA_PROC_GONE);
1174 spa->spa_proc_state = SPA_PROC_NONE;
1176 ASSERT(spa->spa_proc == &p0);
1177 mutex_exit(&spa->spa_proc_lock);
1181 * We want to make sure spa_thread() has actually exited the ZFS
1182 * module, so that the module can't be unloaded out from underneath
1185 if (spa->spa_did != 0) {
1186 thread_join(spa->spa_did);
1189 #endif /* SPA_PROCESS */
1193 * Verify a pool configuration, and construct the vdev tree appropriately. This
1194 * will create all the necessary vdevs in the appropriate layout, with each vdev
1195 * in the CLOSED state. This will prep the pool before open/creation/import.
1196 * All vdev validation is done by the vdev_alloc() routine.
1199 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent,
1200 uint_t id, int atype)
1206 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0)
1209 if ((*vdp)->vdev_ops->vdev_op_leaf)
1212 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
1215 if (error == ENOENT)
1221 return (SET_ERROR(EINVAL));
1224 for (int c = 0; c < children; c++) {
1226 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c,
1234 ASSERT(*vdp != NULL);
1240 * Opposite of spa_load().
1243 spa_unload(spa_t *spa)
1247 ASSERT(MUTEX_HELD(&spa_namespace_lock));
1252 trim_thread_destroy(spa);
1257 spa_async_suspend(spa);
1262 if (spa->spa_sync_on) {
1263 txg_sync_stop(spa->spa_dsl_pool);
1264 spa->spa_sync_on = B_FALSE;
1268 * Wait for any outstanding async I/O to complete.
1270 if (spa->spa_async_zio_root != NULL) {
1271 (void) zio_wait(spa->spa_async_zio_root);
1272 spa->spa_async_zio_root = NULL;
1275 bpobj_close(&spa->spa_deferred_bpobj);
1277 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1282 if (spa->spa_root_vdev)
1283 vdev_free(spa->spa_root_vdev);
1284 ASSERT(spa->spa_root_vdev == NULL);
1287 * Close the dsl pool.
1289 if (spa->spa_dsl_pool) {
1290 dsl_pool_close(spa->spa_dsl_pool);
1291 spa->spa_dsl_pool = NULL;
1292 spa->spa_meta_objset = NULL;
1299 * Drop and purge level 2 cache
1301 spa_l2cache_drop(spa);
1303 for (i = 0; i < spa->spa_spares.sav_count; i++)
1304 vdev_free(spa->spa_spares.sav_vdevs[i]);
1305 if (spa->spa_spares.sav_vdevs) {
1306 kmem_free(spa->spa_spares.sav_vdevs,
1307 spa->spa_spares.sav_count * sizeof (void *));
1308 spa->spa_spares.sav_vdevs = NULL;
1310 if (spa->spa_spares.sav_config) {
1311 nvlist_free(spa->spa_spares.sav_config);
1312 spa->spa_spares.sav_config = NULL;
1314 spa->spa_spares.sav_count = 0;
1316 for (i = 0; i < spa->spa_l2cache.sav_count; i++) {
1317 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]);
1318 vdev_free(spa->spa_l2cache.sav_vdevs[i]);
1320 if (spa->spa_l2cache.sav_vdevs) {
1321 kmem_free(spa->spa_l2cache.sav_vdevs,
1322 spa->spa_l2cache.sav_count * sizeof (void *));
1323 spa->spa_l2cache.sav_vdevs = NULL;
1325 if (spa->spa_l2cache.sav_config) {
1326 nvlist_free(spa->spa_l2cache.sav_config);
1327 spa->spa_l2cache.sav_config = NULL;
1329 spa->spa_l2cache.sav_count = 0;
1331 spa->spa_async_suspended = 0;
1333 if (spa->spa_comment != NULL) {
1334 spa_strfree(spa->spa_comment);
1335 spa->spa_comment = NULL;
1338 spa_config_exit(spa, SCL_ALL, FTAG);
1342 * Load (or re-load) the current list of vdevs describing the active spares for
1343 * this pool. When this is called, we have some form of basic information in
1344 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1345 * then re-generate a more complete list including status information.
1348 spa_load_spares(spa_t *spa)
1355 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1358 * First, close and free any existing spare vdevs.
1360 for (i = 0; i < spa->spa_spares.sav_count; i++) {
1361 vd = spa->spa_spares.sav_vdevs[i];
1363 /* Undo the call to spa_activate() below */
1364 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
1365 B_FALSE)) != NULL && tvd->vdev_isspare)
1366 spa_spare_remove(tvd);
1371 if (spa->spa_spares.sav_vdevs)
1372 kmem_free(spa->spa_spares.sav_vdevs,
1373 spa->spa_spares.sav_count * sizeof (void *));
1375 if (spa->spa_spares.sav_config == NULL)
1378 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
1379 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
1381 spa->spa_spares.sav_count = (int)nspares;
1382 spa->spa_spares.sav_vdevs = NULL;
1388 * Construct the array of vdevs, opening them to get status in the
1389 * process. For each spare, there is potentially two different vdev_t
1390 * structures associated with it: one in the list of spares (used only
1391 * for basic validation purposes) and one in the active vdev
1392 * configuration (if it's spared in). During this phase we open and
1393 * validate each vdev on the spare list. If the vdev also exists in the
1394 * active configuration, then we also mark this vdev as an active spare.
1396 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *),
1398 for (i = 0; i < spa->spa_spares.sav_count; i++) {
1399 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0,
1400 VDEV_ALLOC_SPARE) == 0);
1403 spa->spa_spares.sav_vdevs[i] = vd;
1405 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
1406 B_FALSE)) != NULL) {
1407 if (!tvd->vdev_isspare)
1411 * We only mark the spare active if we were successfully
1412 * able to load the vdev. Otherwise, importing a pool
1413 * with a bad active spare would result in strange
1414 * behavior, because multiple pool would think the spare
1415 * is actively in use.
1417 * There is a vulnerability here to an equally bizarre
1418 * circumstance, where a dead active spare is later
1419 * brought back to life (onlined or otherwise). Given
1420 * the rarity of this scenario, and the extra complexity
1421 * it adds, we ignore the possibility.
1423 if (!vdev_is_dead(tvd))
1424 spa_spare_activate(tvd);
1428 vd->vdev_aux = &spa->spa_spares;
1430 if (vdev_open(vd) != 0)
1433 if (vdev_validate_aux(vd) == 0)
1438 * Recompute the stashed list of spares, with status information
1441 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES,
1442 DATA_TYPE_NVLIST_ARRAY) == 0);
1444 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *),
1446 for (i = 0; i < spa->spa_spares.sav_count; i++)
1447 spares[i] = vdev_config_generate(spa,
1448 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE);
1449 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
1450 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0);
1451 for (i = 0; i < spa->spa_spares.sav_count; i++)
1452 nvlist_free(spares[i]);
1453 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *));
1457 * Load (or re-load) the current list of vdevs describing the active l2cache for
1458 * this pool. When this is called, we have some form of basic information in
1459 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1460 * then re-generate a more complete list including status information.
1461 * Devices which are already active have their details maintained, and are
1465 spa_load_l2cache(spa_t *spa)
1469 int i, j, oldnvdevs;
1471 vdev_t *vd, **oldvdevs, **newvdevs;
1472 spa_aux_vdev_t *sav = &spa->spa_l2cache;
1474 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1476 if (sav->sav_config != NULL) {
1477 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config,
1478 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
1479 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP);
1485 oldvdevs = sav->sav_vdevs;
1486 oldnvdevs = sav->sav_count;
1487 sav->sav_vdevs = NULL;
1491 * Process new nvlist of vdevs.
1493 for (i = 0; i < nl2cache; i++) {
1494 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID,
1498 for (j = 0; j < oldnvdevs; j++) {
1500 if (vd != NULL && guid == vd->vdev_guid) {
1502 * Retain previous vdev for add/remove ops.
1510 if (newvdevs[i] == NULL) {
1514 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0,
1515 VDEV_ALLOC_L2CACHE) == 0);
1520 * Commit this vdev as an l2cache device,
1521 * even if it fails to open.
1523 spa_l2cache_add(vd);
1528 spa_l2cache_activate(vd);
1530 if (vdev_open(vd) != 0)
1533 (void) vdev_validate_aux(vd);
1535 if (!vdev_is_dead(vd))
1536 l2arc_add_vdev(spa, vd);
1541 * Purge vdevs that were dropped
1543 for (i = 0; i < oldnvdevs; i++) {
1548 ASSERT(vd->vdev_isl2cache);
1550 if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
1551 pool != 0ULL && l2arc_vdev_present(vd))
1552 l2arc_remove_vdev(vd);
1553 vdev_clear_stats(vd);
1559 kmem_free(oldvdevs, oldnvdevs * sizeof (void *));
1561 if (sav->sav_config == NULL)
1564 sav->sav_vdevs = newvdevs;
1565 sav->sav_count = (int)nl2cache;
1568 * Recompute the stashed list of l2cache devices, with status
1569 * information this time.
1571 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE,
1572 DATA_TYPE_NVLIST_ARRAY) == 0);
1574 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
1575 for (i = 0; i < sav->sav_count; i++)
1576 l2cache[i] = vdev_config_generate(spa,
1577 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE);
1578 VERIFY(nvlist_add_nvlist_array(sav->sav_config,
1579 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0);
1581 for (i = 0; i < sav->sav_count; i++)
1582 nvlist_free(l2cache[i]);
1584 kmem_free(l2cache, sav->sav_count * sizeof (void *));
1588 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value)
1591 char *packed = NULL;
1596 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db);
1599 nvsize = *(uint64_t *)db->db_data;
1600 dmu_buf_rele(db, FTAG);
1602 packed = kmem_alloc(nvsize, KM_SLEEP);
1603 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed,
1606 error = nvlist_unpack(packed, nvsize, value, 0);
1607 kmem_free(packed, nvsize);
1613 * Checks to see if the given vdev could not be opened, in which case we post a
1614 * sysevent to notify the autoreplace code that the device has been removed.
1617 spa_check_removed(vdev_t *vd)
1619 for (int c = 0; c < vd->vdev_children; c++)
1620 spa_check_removed(vd->vdev_child[c]);
1622 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) &&
1624 zfs_post_autoreplace(vd->vdev_spa, vd);
1625 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK);
1630 * Validate the current config against the MOS config
1633 spa_config_valid(spa_t *spa, nvlist_t *config)
1635 vdev_t *mrvd, *rvd = spa->spa_root_vdev;
1638 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0);
1640 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1641 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0);
1643 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children);
1646 * If we're doing a normal import, then build up any additional
1647 * diagnostic information about missing devices in this config.
1648 * We'll pass this up to the user for further processing.
1650 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) {
1651 nvlist_t **child, *nv;
1654 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **),
1656 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1658 for (int c = 0; c < rvd->vdev_children; c++) {
1659 vdev_t *tvd = rvd->vdev_child[c];
1660 vdev_t *mtvd = mrvd->vdev_child[c];
1662 if (tvd->vdev_ops == &vdev_missing_ops &&
1663 mtvd->vdev_ops != &vdev_missing_ops &&
1665 child[idx++] = vdev_config_generate(spa, mtvd,
1670 VERIFY(nvlist_add_nvlist_array(nv,
1671 ZPOOL_CONFIG_CHILDREN, child, idx) == 0);
1672 VERIFY(nvlist_add_nvlist(spa->spa_load_info,
1673 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0);
1675 for (int i = 0; i < idx; i++)
1676 nvlist_free(child[i]);
1679 kmem_free(child, rvd->vdev_children * sizeof (char **));
1683 * Compare the root vdev tree with the information we have
1684 * from the MOS config (mrvd). Check each top-level vdev
1685 * with the corresponding MOS config top-level (mtvd).
1687 for (int c = 0; c < rvd->vdev_children; c++) {
1688 vdev_t *tvd = rvd->vdev_child[c];
1689 vdev_t *mtvd = mrvd->vdev_child[c];
1692 * Resolve any "missing" vdevs in the current configuration.
1693 * If we find that the MOS config has more accurate information
1694 * about the top-level vdev then use that vdev instead.
1696 if (tvd->vdev_ops == &vdev_missing_ops &&
1697 mtvd->vdev_ops != &vdev_missing_ops) {
1699 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG))
1703 * Device specific actions.
1705 if (mtvd->vdev_islog) {
1706 spa_set_log_state(spa, SPA_LOG_CLEAR);
1709 * XXX - once we have 'readonly' pool
1710 * support we should be able to handle
1711 * missing data devices by transitioning
1712 * the pool to readonly.
1718 * Swap the missing vdev with the data we were
1719 * able to obtain from the MOS config.
1721 vdev_remove_child(rvd, tvd);
1722 vdev_remove_child(mrvd, mtvd);
1724 vdev_add_child(rvd, mtvd);
1725 vdev_add_child(mrvd, tvd);
1727 spa_config_exit(spa, SCL_ALL, FTAG);
1729 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1732 } else if (mtvd->vdev_islog) {
1734 * Load the slog device's state from the MOS config
1735 * since it's possible that the label does not
1736 * contain the most up-to-date information.
1738 vdev_load_log_state(tvd, mtvd);
1743 spa_config_exit(spa, SCL_ALL, FTAG);
1746 * Ensure we were able to validate the config.
1748 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum);
1752 * Check for missing log devices
1755 spa_check_logs(spa_t *spa)
1757 boolean_t rv = B_FALSE;
1759 switch (spa->spa_log_state) {
1760 case SPA_LOG_MISSING:
1761 /* need to recheck in case slog has been restored */
1762 case SPA_LOG_UNKNOWN:
1763 rv = (dmu_objset_find(spa->spa_name, zil_check_log_chain,
1764 NULL, DS_FIND_CHILDREN) != 0);
1766 spa_set_log_state(spa, SPA_LOG_MISSING);
1773 spa_passivate_log(spa_t *spa)
1775 vdev_t *rvd = spa->spa_root_vdev;
1776 boolean_t slog_found = B_FALSE;
1778 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER));
1780 if (!spa_has_slogs(spa))
1783 for (int c = 0; c < rvd->vdev_children; c++) {
1784 vdev_t *tvd = rvd->vdev_child[c];
1785 metaslab_group_t *mg = tvd->vdev_mg;
1787 if (tvd->vdev_islog) {
1788 metaslab_group_passivate(mg);
1789 slog_found = B_TRUE;
1793 return (slog_found);
1797 spa_activate_log(spa_t *spa)
1799 vdev_t *rvd = spa->spa_root_vdev;
1801 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER));
1803 for (int c = 0; c < rvd->vdev_children; c++) {
1804 vdev_t *tvd = rvd->vdev_child[c];
1805 metaslab_group_t *mg = tvd->vdev_mg;
1807 if (tvd->vdev_islog)
1808 metaslab_group_activate(mg);
1813 spa_offline_log(spa_t *spa)
1817 error = dmu_objset_find(spa_name(spa), zil_vdev_offline,
1818 NULL, DS_FIND_CHILDREN);
1821 * We successfully offlined the log device, sync out the
1822 * current txg so that the "stubby" block can be removed
1825 txg_wait_synced(spa->spa_dsl_pool, 0);
1831 spa_aux_check_removed(spa_aux_vdev_t *sav)
1835 for (i = 0; i < sav->sav_count; i++)
1836 spa_check_removed(sav->sav_vdevs[i]);
1840 spa_claim_notify(zio_t *zio)
1842 spa_t *spa = zio->io_spa;
1847 mutex_enter(&spa->spa_props_lock); /* any mutex will do */
1848 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth)
1849 spa->spa_claim_max_txg = zio->io_bp->blk_birth;
1850 mutex_exit(&spa->spa_props_lock);
1853 typedef struct spa_load_error {
1854 uint64_t sle_meta_count;
1855 uint64_t sle_data_count;
1859 spa_load_verify_done(zio_t *zio)
1861 blkptr_t *bp = zio->io_bp;
1862 spa_load_error_t *sle = zio->io_private;
1863 dmu_object_type_t type = BP_GET_TYPE(bp);
1864 int error = zio->io_error;
1867 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) &&
1868 type != DMU_OT_INTENT_LOG)
1869 atomic_add_64(&sle->sle_meta_count, 1);
1871 atomic_add_64(&sle->sle_data_count, 1);
1873 zio_data_buf_free(zio->io_data, zio->io_size);
1878 spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
1879 const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
1881 if (!BP_IS_HOLE(bp)) {
1883 size_t size = BP_GET_PSIZE(bp);
1884 void *data = zio_data_buf_alloc(size);
1886 zio_nowait(zio_read(rio, spa, bp, data, size,
1887 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB,
1888 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL |
1889 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb));
1895 spa_load_verify(spa_t *spa)
1898 spa_load_error_t sle = { 0 };
1899 zpool_rewind_policy_t policy;
1900 boolean_t verify_ok = B_FALSE;
1903 zpool_get_rewind_policy(spa->spa_config, &policy);
1905 if (policy.zrp_request & ZPOOL_NEVER_REWIND)
1908 rio = zio_root(spa, NULL, &sle,
1909 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
1911 error = traverse_pool(spa, spa->spa_verify_min_txg,
1912 TRAVERSE_PRE | TRAVERSE_PREFETCH, spa_load_verify_cb, rio);
1914 (void) zio_wait(rio);
1916 spa->spa_load_meta_errors = sle.sle_meta_count;
1917 spa->spa_load_data_errors = sle.sle_data_count;
1919 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta &&
1920 sle.sle_data_count <= policy.zrp_maxdata) {
1924 spa->spa_load_txg = spa->spa_uberblock.ub_txg;
1925 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp;
1927 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts;
1928 VERIFY(nvlist_add_uint64(spa->spa_load_info,
1929 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0);
1930 VERIFY(nvlist_add_int64(spa->spa_load_info,
1931 ZPOOL_CONFIG_REWIND_TIME, loss) == 0);
1932 VERIFY(nvlist_add_uint64(spa->spa_load_info,
1933 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0);
1935 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg;
1939 if (error != ENXIO && error != EIO)
1940 error = SET_ERROR(EIO);
1944 return (verify_ok ? 0 : EIO);
1948 * Find a value in the pool props object.
1951 spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val)
1953 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object,
1954 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val);
1958 * Find a value in the pool directory object.
1961 spa_dir_prop(spa_t *spa, const char *name, uint64_t *val)
1963 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
1964 name, sizeof (uint64_t), 1, val));
1968 spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err)
1970 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux);
1975 * Fix up config after a partly-completed split. This is done with the
1976 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
1977 * pool have that entry in their config, but only the splitting one contains
1978 * a list of all the guids of the vdevs that are being split off.
1980 * This function determines what to do with that list: either rejoin
1981 * all the disks to the pool, or complete the splitting process. To attempt
1982 * the rejoin, each disk that is offlined is marked online again, and
1983 * we do a reopen() call. If the vdev label for every disk that was
1984 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
1985 * then we call vdev_split() on each disk, and complete the split.
1987 * Otherwise we leave the config alone, with all the vdevs in place in
1988 * the original pool.
1991 spa_try_repair(spa_t *spa, nvlist_t *config)
1998 boolean_t attempt_reopen;
2000 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0)
2003 /* check that the config is complete */
2004 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST,
2005 &glist, &gcount) != 0)
2008 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP);
2010 /* attempt to online all the vdevs & validate */
2011 attempt_reopen = B_TRUE;
2012 for (i = 0; i < gcount; i++) {
2013 if (glist[i] == 0) /* vdev is hole */
2016 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE);
2017 if (vd[i] == NULL) {
2019 * Don't bother attempting to reopen the disks;
2020 * just do the split.
2022 attempt_reopen = B_FALSE;
2024 /* attempt to re-online it */
2025 vd[i]->vdev_offline = B_FALSE;
2029 if (attempt_reopen) {
2030 vdev_reopen(spa->spa_root_vdev);
2032 /* check each device to see what state it's in */
2033 for (extracted = 0, i = 0; i < gcount; i++) {
2034 if (vd[i] != NULL &&
2035 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL)
2042 * If every disk has been moved to the new pool, or if we never
2043 * even attempted to look at them, then we split them off for
2046 if (!attempt_reopen || gcount == extracted) {
2047 for (i = 0; i < gcount; i++)
2050 vdev_reopen(spa->spa_root_vdev);
2053 kmem_free(vd, gcount * sizeof (vdev_t *));
2057 spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type,
2058 boolean_t mosconfig)
2060 nvlist_t *config = spa->spa_config;
2061 char *ereport = FM_EREPORT_ZFS_POOL;
2067 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid))
2068 return (SET_ERROR(EINVAL));
2070 ASSERT(spa->spa_comment == NULL);
2071 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0)
2072 spa->spa_comment = spa_strdup(comment);
2075 * Versioning wasn't explicitly added to the label until later, so if
2076 * it's not present treat it as the initial version.
2078 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
2079 &spa->spa_ubsync.ub_version) != 0)
2080 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
2082 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG,
2083 &spa->spa_config_txg);
2085 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) &&
2086 spa_guid_exists(pool_guid, 0)) {
2087 error = SET_ERROR(EEXIST);
2089 spa->spa_config_guid = pool_guid;
2091 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT,
2093 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting,
2097 nvlist_free(spa->spa_load_info);
2098 spa->spa_load_info = fnvlist_alloc();
2100 gethrestime(&spa->spa_loaded_ts);
2101 error = spa_load_impl(spa, pool_guid, config, state, type,
2102 mosconfig, &ereport);
2105 spa->spa_minref = refcount_count(&spa->spa_refcount);
2107 if (error != EEXIST) {
2108 spa->spa_loaded_ts.tv_sec = 0;
2109 spa->spa_loaded_ts.tv_nsec = 0;
2111 if (error != EBADF) {
2112 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0);
2115 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE;
2122 * Load an existing storage pool, using the pool's builtin spa_config as a
2123 * source of configuration information.
2126 spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config,
2127 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig,
2131 nvlist_t *nvroot = NULL;
2134 uberblock_t *ub = &spa->spa_uberblock;
2135 uint64_t children, config_cache_txg = spa->spa_config_txg;
2136 int orig_mode = spa->spa_mode;
2139 boolean_t missing_feat_write = B_FALSE;
2142 * If this is an untrusted config, access the pool in read-only mode.
2143 * This prevents things like resilvering recently removed devices.
2146 spa->spa_mode = FREAD;
2148 ASSERT(MUTEX_HELD(&spa_namespace_lock));
2150 spa->spa_load_state = state;
2152 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot))
2153 return (SET_ERROR(EINVAL));
2155 parse = (type == SPA_IMPORT_EXISTING ?
2156 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT);
2159 * Create "The Godfather" zio to hold all async IOs
2161 spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
2162 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER);
2165 * Parse the configuration into a vdev tree. We explicitly set the
2166 * value that will be returned by spa_version() since parsing the
2167 * configuration requires knowing the version number.
2169 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2170 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse);
2171 spa_config_exit(spa, SCL_ALL, FTAG);
2176 ASSERT(spa->spa_root_vdev == rvd);
2178 if (type != SPA_IMPORT_ASSEMBLE) {
2179 ASSERT(spa_guid(spa) == pool_guid);
2183 * Try to open all vdevs, loading each label in the process.
2185 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2186 error = vdev_open(rvd);
2187 spa_config_exit(spa, SCL_ALL, FTAG);
2192 * We need to validate the vdev labels against the configuration that
2193 * we have in hand, which is dependent on the setting of mosconfig. If
2194 * mosconfig is true then we're validating the vdev labels based on
2195 * that config. Otherwise, we're validating against the cached config
2196 * (zpool.cache) that was read when we loaded the zfs module, and then
2197 * later we will recursively call spa_load() and validate against
2200 * If we're assembling a new pool that's been split off from an
2201 * existing pool, the labels haven't yet been updated so we skip
2202 * validation for now.
2204 if (type != SPA_IMPORT_ASSEMBLE) {
2205 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2206 error = vdev_validate(rvd, mosconfig);
2207 spa_config_exit(spa, SCL_ALL, FTAG);
2212 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN)
2213 return (SET_ERROR(ENXIO));
2217 * Find the best uberblock.
2219 vdev_uberblock_load(rvd, ub, &label);
2222 * If we weren't able to find a single valid uberblock, return failure.
2224 if (ub->ub_txg == 0) {
2226 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO));
2230 * If the pool has an unsupported version we can't open it.
2232 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) {
2234 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP));
2237 if (ub->ub_version >= SPA_VERSION_FEATURES) {
2241 * If we weren't able to find what's necessary for reading the
2242 * MOS in the label, return failure.
2244 if (label == NULL || nvlist_lookup_nvlist(label,
2245 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) {
2247 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA,
2252 * Update our in-core representation with the definitive values
2255 nvlist_free(spa->spa_label_features);
2256 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0);
2262 * Look through entries in the label nvlist's features_for_read. If
2263 * there is a feature listed there which we don't understand then we
2264 * cannot open a pool.
2266 if (ub->ub_version >= SPA_VERSION_FEATURES) {
2267 nvlist_t *unsup_feat;
2269 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) ==
2272 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features,
2274 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) {
2275 if (!zfeature_is_supported(nvpair_name(nvp))) {
2276 VERIFY(nvlist_add_string(unsup_feat,
2277 nvpair_name(nvp), "") == 0);
2281 if (!nvlist_empty(unsup_feat)) {
2282 VERIFY(nvlist_add_nvlist(spa->spa_load_info,
2283 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0);
2284 nvlist_free(unsup_feat);
2285 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT,
2289 nvlist_free(unsup_feat);
2293 * If the vdev guid sum doesn't match the uberblock, we have an
2294 * incomplete configuration. We first check to see if the pool
2295 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
2296 * If it is, defer the vdev_guid_sum check till later so we
2297 * can handle missing vdevs.
2299 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN,
2300 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE &&
2301 rvd->vdev_guid_sum != ub->ub_guid_sum)
2302 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO));
2304 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) {
2305 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2306 spa_try_repair(spa, config);
2307 spa_config_exit(spa, SCL_ALL, FTAG);
2308 nvlist_free(spa->spa_config_splitting);
2309 spa->spa_config_splitting = NULL;
2313 * Initialize internal SPA structures.
2315 spa->spa_state = POOL_STATE_ACTIVE;
2316 spa->spa_ubsync = spa->spa_uberblock;
2317 spa->spa_verify_min_txg = spa->spa_extreme_rewind ?
2318 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1;
2319 spa->spa_first_txg = spa->spa_last_ubsync_txg ?
2320 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1;
2321 spa->spa_claim_max_txg = spa->spa_first_txg;
2322 spa->spa_prev_software_version = ub->ub_software_version;
2324 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool);
2326 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2327 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset;
2329 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0)
2330 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2332 if (spa_version(spa) >= SPA_VERSION_FEATURES) {
2333 boolean_t missing_feat_read = B_FALSE;
2334 nvlist_t *unsup_feat, *enabled_feat;
2336 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ,
2337 &spa->spa_feat_for_read_obj) != 0) {
2338 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2341 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE,
2342 &spa->spa_feat_for_write_obj) != 0) {
2343 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2346 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS,
2347 &spa->spa_feat_desc_obj) != 0) {
2348 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2351 enabled_feat = fnvlist_alloc();
2352 unsup_feat = fnvlist_alloc();
2354 if (!spa_features_check(spa, B_FALSE,
2355 unsup_feat, enabled_feat))
2356 missing_feat_read = B_TRUE;
2358 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) {
2359 if (!spa_features_check(spa, B_TRUE,
2360 unsup_feat, enabled_feat)) {
2361 missing_feat_write = B_TRUE;
2365 fnvlist_add_nvlist(spa->spa_load_info,
2366 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat);
2368 if (!nvlist_empty(unsup_feat)) {
2369 fnvlist_add_nvlist(spa->spa_load_info,
2370 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat);
2373 fnvlist_free(enabled_feat);
2374 fnvlist_free(unsup_feat);
2376 if (!missing_feat_read) {
2377 fnvlist_add_boolean(spa->spa_load_info,
2378 ZPOOL_CONFIG_CAN_RDONLY);
2382 * If the state is SPA_LOAD_TRYIMPORT, our objective is
2383 * twofold: to determine whether the pool is available for
2384 * import in read-write mode and (if it is not) whether the
2385 * pool is available for import in read-only mode. If the pool
2386 * is available for import in read-write mode, it is displayed
2387 * as available in userland; if it is not available for import
2388 * in read-only mode, it is displayed as unavailable in
2389 * userland. If the pool is available for import in read-only
2390 * mode but not read-write mode, it is displayed as unavailable
2391 * in userland with a special note that the pool is actually
2392 * available for open in read-only mode.
2394 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are
2395 * missing a feature for write, we must first determine whether
2396 * the pool can be opened read-only before returning to
2397 * userland in order to know whether to display the
2398 * abovementioned note.
2400 if (missing_feat_read || (missing_feat_write &&
2401 spa_writeable(spa))) {
2402 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT,
2407 * Load refcounts for ZFS features from disk into an in-memory
2408 * cache during SPA initialization.
2410 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
2413 error = feature_get_refcount_from_disk(spa,
2414 &spa_feature_table[i], &refcount);
2416 spa->spa_feat_refcount_cache[i] = refcount;
2417 } else if (error == ENOTSUP) {
2418 spa->spa_feat_refcount_cache[i] =
2419 SPA_FEATURE_DISABLED;
2421 return (spa_vdev_err(rvd,
2422 VDEV_AUX_CORRUPT_DATA, EIO));
2427 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) {
2428 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG,
2429 &spa->spa_feat_enabled_txg_obj) != 0) {
2430 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2434 spa->spa_is_initializing = B_TRUE;
2435 error = dsl_pool_open(spa->spa_dsl_pool);
2436 spa->spa_is_initializing = B_FALSE;
2438 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2442 nvlist_t *policy = NULL, *nvconfig;
2444 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0)
2445 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2447 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig,
2448 ZPOOL_CONFIG_HOSTID, &hostid) == 0) {
2450 unsigned long myhostid = 0;
2452 VERIFY(nvlist_lookup_string(nvconfig,
2453 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0);
2456 myhostid = zone_get_hostid(NULL);
2459 * We're emulating the system's hostid in userland, so
2460 * we can't use zone_get_hostid().
2462 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid);
2463 #endif /* _KERNEL */
2464 if (check_hostid && hostid != 0 && myhostid != 0 &&
2465 hostid != myhostid) {
2466 nvlist_free(nvconfig);
2467 cmn_err(CE_WARN, "pool '%s' could not be "
2468 "loaded as it was last accessed by "
2469 "another system (host: %s hostid: 0x%lx). "
2470 "See: http://illumos.org/msg/ZFS-8000-EY",
2471 spa_name(spa), hostname,
2472 (unsigned long)hostid);
2473 return (SET_ERROR(EBADF));
2476 if (nvlist_lookup_nvlist(spa->spa_config,
2477 ZPOOL_REWIND_POLICY, &policy) == 0)
2478 VERIFY(nvlist_add_nvlist(nvconfig,
2479 ZPOOL_REWIND_POLICY, policy) == 0);
2481 spa_config_set(spa, nvconfig);
2483 spa_deactivate(spa);
2484 spa_activate(spa, orig_mode);
2486 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE));
2489 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0)
2490 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2491 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj);
2493 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2496 * Load the bit that tells us to use the new accounting function
2497 * (raid-z deflation). If we have an older pool, this will not
2500 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate);
2501 if (error != 0 && error != ENOENT)
2502 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2504 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION,
2505 &spa->spa_creation_version);
2506 if (error != 0 && error != ENOENT)
2507 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2510 * Load the persistent error log. If we have an older pool, this will
2513 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last);
2514 if (error != 0 && error != ENOENT)
2515 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2517 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB,
2518 &spa->spa_errlog_scrub);
2519 if (error != 0 && error != ENOENT)
2520 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2523 * Load the history object. If we have an older pool, this
2524 * will not be present.
2526 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history);
2527 if (error != 0 && error != ENOENT)
2528 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2531 * If we're assembling the pool from the split-off vdevs of
2532 * an existing pool, we don't want to attach the spares & cache
2537 * Load any hot spares for this pool.
2539 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object);
2540 if (error != 0 && error != ENOENT)
2541 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2542 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) {
2543 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES);
2544 if (load_nvlist(spa, spa->spa_spares.sav_object,
2545 &spa->spa_spares.sav_config) != 0)
2546 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2548 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2549 spa_load_spares(spa);
2550 spa_config_exit(spa, SCL_ALL, FTAG);
2551 } else if (error == 0) {
2552 spa->spa_spares.sav_sync = B_TRUE;
2556 * Load any level 2 ARC devices for this pool.
2558 error = spa_dir_prop(spa, DMU_POOL_L2CACHE,
2559 &spa->spa_l2cache.sav_object);
2560 if (error != 0 && error != ENOENT)
2561 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2562 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) {
2563 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE);
2564 if (load_nvlist(spa, spa->spa_l2cache.sav_object,
2565 &spa->spa_l2cache.sav_config) != 0)
2566 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2568 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2569 spa_load_l2cache(spa);
2570 spa_config_exit(spa, SCL_ALL, FTAG);
2571 } else if (error == 0) {
2572 spa->spa_l2cache.sav_sync = B_TRUE;
2575 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
2577 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object);
2578 if (error && error != ENOENT)
2579 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2582 uint64_t autoreplace;
2584 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs);
2585 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace);
2586 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation);
2587 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode);
2588 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand);
2589 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO,
2590 &spa->spa_dedup_ditto);
2592 spa->spa_autoreplace = (autoreplace != 0);
2596 * If the 'autoreplace' property is set, then post a resource notifying
2597 * the ZFS DE that it should not issue any faults for unopenable
2598 * devices. We also iterate over the vdevs, and post a sysevent for any
2599 * unopenable vdevs so that the normal autoreplace handler can take
2602 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) {
2603 spa_check_removed(spa->spa_root_vdev);
2605 * For the import case, this is done in spa_import(), because
2606 * at this point we're using the spare definitions from
2607 * the MOS config, not necessarily from the userland config.
2609 if (state != SPA_LOAD_IMPORT) {
2610 spa_aux_check_removed(&spa->spa_spares);
2611 spa_aux_check_removed(&spa->spa_l2cache);
2616 * Load the vdev state for all toplevel vdevs.
2621 * Propagate the leaf DTLs we just loaded all the way up the tree.
2623 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2624 vdev_dtl_reassess(rvd, 0, 0, B_FALSE);
2625 spa_config_exit(spa, SCL_ALL, FTAG);
2628 * Load the DDTs (dedup tables).
2630 error = ddt_load(spa);
2632 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2634 spa_update_dspace(spa);
2637 * Validate the config, using the MOS config to fill in any
2638 * information which might be missing. If we fail to validate
2639 * the config then declare the pool unfit for use. If we're
2640 * assembling a pool from a split, the log is not transferred
2643 if (type != SPA_IMPORT_ASSEMBLE) {
2646 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0)
2647 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2649 if (!spa_config_valid(spa, nvconfig)) {
2650 nvlist_free(nvconfig);
2651 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM,
2654 nvlist_free(nvconfig);
2657 * Now that we've validated the config, check the state of the
2658 * root vdev. If it can't be opened, it indicates one or
2659 * more toplevel vdevs are faulted.
2661 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN)
2662 return (SET_ERROR(ENXIO));
2664 if (spa_check_logs(spa)) {
2665 *ereport = FM_EREPORT_ZFS_LOG_REPLAY;
2666 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO));
2670 if (missing_feat_write) {
2671 ASSERT(state == SPA_LOAD_TRYIMPORT);
2674 * At this point, we know that we can open the pool in
2675 * read-only mode but not read-write mode. We now have enough
2676 * information and can return to userland.
2678 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP));
2682 * We've successfully opened the pool, verify that we're ready
2683 * to start pushing transactions.
2685 if (state != SPA_LOAD_TRYIMPORT) {
2686 if (error = spa_load_verify(spa))
2687 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA,
2691 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER ||
2692 spa->spa_load_max_txg == UINT64_MAX)) {
2694 int need_update = B_FALSE;
2696 ASSERT(state != SPA_LOAD_TRYIMPORT);
2699 * Claim log blocks that haven't been committed yet.
2700 * This must all happen in a single txg.
2701 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2702 * invoked from zil_claim_log_block()'s i/o done callback.
2703 * Price of rollback is that we abandon the log.
2705 spa->spa_claiming = B_TRUE;
2707 tx = dmu_tx_create_assigned(spa_get_dsl(spa),
2708 spa_first_txg(spa));
2709 (void) dmu_objset_find(spa_name(spa),
2710 zil_claim, tx, DS_FIND_CHILDREN);
2713 spa->spa_claiming = B_FALSE;
2715 spa_set_log_state(spa, SPA_LOG_GOOD);
2716 spa->spa_sync_on = B_TRUE;
2717 txg_sync_start(spa->spa_dsl_pool);
2720 * Wait for all claims to sync. We sync up to the highest
2721 * claimed log block birth time so that claimed log blocks
2722 * don't appear to be from the future. spa_claim_max_txg
2723 * will have been set for us by either zil_check_log_chain()
2724 * (invoked from spa_check_logs()) or zil_claim() above.
2726 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg);
2729 * If the config cache is stale, or we have uninitialized
2730 * metaslabs (see spa_vdev_add()), then update the config.
2732 * If this is a verbatim import, trust the current
2733 * in-core spa_config and update the disk labels.
2735 if (config_cache_txg != spa->spa_config_txg ||
2736 state == SPA_LOAD_IMPORT ||
2737 state == SPA_LOAD_RECOVER ||
2738 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM))
2739 need_update = B_TRUE;
2741 for (int c = 0; c < rvd->vdev_children; c++)
2742 if (rvd->vdev_child[c]->vdev_ms_array == 0)
2743 need_update = B_TRUE;
2746 * Update the config cache asychronously in case we're the
2747 * root pool, in which case the config cache isn't writable yet.
2750 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
2753 * Check all DTLs to see if anything needs resilvering.
2755 if (!dsl_scan_resilvering(spa->spa_dsl_pool) &&
2756 vdev_resilver_needed(rvd, NULL, NULL))
2757 spa_async_request(spa, SPA_ASYNC_RESILVER);
2760 * Log the fact that we booted up (so that we can detect if
2761 * we rebooted in the middle of an operation).
2763 spa_history_log_version(spa, "open");
2766 * Delete any inconsistent datasets.
2768 (void) dmu_objset_find(spa_name(spa),
2769 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN);
2772 * Clean up any stale temporary dataset userrefs.
2774 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool);
2781 spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig)
2783 int mode = spa->spa_mode;
2786 spa_deactivate(spa);
2788 spa->spa_load_max_txg--;
2790 spa_activate(spa, mode);
2791 spa_async_suspend(spa);
2793 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig));
2797 * If spa_load() fails this function will try loading prior txg's. If
2798 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool
2799 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this
2800 * function will not rewind the pool and will return the same error as
2804 spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig,
2805 uint64_t max_request, int rewind_flags)
2807 nvlist_t *loadinfo = NULL;
2808 nvlist_t *config = NULL;
2809 int load_error, rewind_error;
2810 uint64_t safe_rewind_txg;
2813 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) {
2814 spa->spa_load_max_txg = spa->spa_load_txg;
2815 spa_set_log_state(spa, SPA_LOG_CLEAR);
2817 spa->spa_load_max_txg = max_request;
2820 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING,
2822 if (load_error == 0)
2825 if (spa->spa_root_vdev != NULL)
2826 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
2828 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg;
2829 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp;
2831 if (rewind_flags & ZPOOL_NEVER_REWIND) {
2832 nvlist_free(config);
2833 return (load_error);
2836 if (state == SPA_LOAD_RECOVER) {
2837 /* Price of rolling back is discarding txgs, including log */
2838 spa_set_log_state(spa, SPA_LOG_CLEAR);
2841 * If we aren't rolling back save the load info from our first
2842 * import attempt so that we can restore it after attempting
2845 loadinfo = spa->spa_load_info;
2846 spa->spa_load_info = fnvlist_alloc();
2849 spa->spa_load_max_txg = spa->spa_last_ubsync_txg;
2850 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE;
2851 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ?
2852 TXG_INITIAL : safe_rewind_txg;
2855 * Continue as long as we're finding errors, we're still within
2856 * the acceptable rewind range, and we're still finding uberblocks
2858 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg &&
2859 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) {
2860 if (spa->spa_load_max_txg < safe_rewind_txg)
2861 spa->spa_extreme_rewind = B_TRUE;
2862 rewind_error = spa_load_retry(spa, state, mosconfig);
2865 spa->spa_extreme_rewind = B_FALSE;
2866 spa->spa_load_max_txg = UINT64_MAX;
2868 if (config && (rewind_error || state != SPA_LOAD_RECOVER))
2869 spa_config_set(spa, config);
2871 if (state == SPA_LOAD_RECOVER) {
2872 ASSERT3P(loadinfo, ==, NULL);
2873 return (rewind_error);
2875 /* Store the rewind info as part of the initial load info */
2876 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO,
2877 spa->spa_load_info);
2879 /* Restore the initial load info */
2880 fnvlist_free(spa->spa_load_info);
2881 spa->spa_load_info = loadinfo;
2883 return (load_error);
2890 * The import case is identical to an open except that the configuration is sent
2891 * down from userland, instead of grabbed from the configuration cache. For the
2892 * case of an open, the pool configuration will exist in the
2893 * POOL_STATE_UNINITIALIZED state.
2895 * The stats information (gen/count/ustats) is used to gather vdev statistics at
2896 * the same time open the pool, without having to keep around the spa_t in some
2900 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy,
2904 spa_load_state_t state = SPA_LOAD_OPEN;
2906 int locked = B_FALSE;
2907 int firstopen = B_FALSE;
2912 * As disgusting as this is, we need to support recursive calls to this
2913 * function because dsl_dir_open() is called during spa_load(), and ends
2914 * up calling spa_open() again. The real fix is to figure out how to
2915 * avoid dsl_dir_open() calling this in the first place.
2917 if (mutex_owner(&spa_namespace_lock) != curthread) {
2918 mutex_enter(&spa_namespace_lock);
2922 if ((spa = spa_lookup(pool)) == NULL) {
2924 mutex_exit(&spa_namespace_lock);
2925 return (SET_ERROR(ENOENT));
2928 if (spa->spa_state == POOL_STATE_UNINITIALIZED) {
2929 zpool_rewind_policy_t policy;
2933 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config,
2935 if (policy.zrp_request & ZPOOL_DO_REWIND)
2936 state = SPA_LOAD_RECOVER;
2938 spa_activate(spa, spa_mode_global);
2940 if (state != SPA_LOAD_RECOVER)
2941 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0;
2943 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg,
2944 policy.zrp_request);
2946 if (error == EBADF) {
2948 * If vdev_validate() returns failure (indicated by
2949 * EBADF), it indicates that one of the vdevs indicates
2950 * that the pool has been exported or destroyed. If
2951 * this is the case, the config cache is out of sync and
2952 * we should remove the pool from the namespace.
2955 spa_deactivate(spa);
2956 spa_config_sync(spa, B_TRUE, B_TRUE);
2959 mutex_exit(&spa_namespace_lock);
2960 return (SET_ERROR(ENOENT));
2965 * We can't open the pool, but we still have useful
2966 * information: the state of each vdev after the
2967 * attempted vdev_open(). Return this to the user.
2969 if (config != NULL && spa->spa_config) {
2970 VERIFY(nvlist_dup(spa->spa_config, config,
2972 VERIFY(nvlist_add_nvlist(*config,
2973 ZPOOL_CONFIG_LOAD_INFO,
2974 spa->spa_load_info) == 0);
2977 spa_deactivate(spa);
2978 spa->spa_last_open_failed = error;
2980 mutex_exit(&spa_namespace_lock);
2986 spa_open_ref(spa, tag);
2989 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
2992 * If we've recovered the pool, pass back any information we
2993 * gathered while doing the load.
2995 if (state == SPA_LOAD_RECOVER) {
2996 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO,
2997 spa->spa_load_info) == 0);
3001 spa->spa_last_open_failed = 0;
3002 spa->spa_last_ubsync_txg = 0;
3003 spa->spa_load_txg = 0;
3004 mutex_exit(&spa_namespace_lock);
3008 zvol_create_minors(spa->spa_name);
3019 spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy,
3022 return (spa_open_common(name, spapp, tag, policy, config));
3026 spa_open(const char *name, spa_t **spapp, void *tag)
3028 return (spa_open_common(name, spapp, tag, NULL, NULL));
3032 * Lookup the given spa_t, incrementing the inject count in the process,
3033 * preventing it from being exported or destroyed.
3036 spa_inject_addref(char *name)
3040 mutex_enter(&spa_namespace_lock);
3041 if ((spa = spa_lookup(name)) == NULL) {
3042 mutex_exit(&spa_namespace_lock);
3045 spa->spa_inject_ref++;
3046 mutex_exit(&spa_namespace_lock);
3052 spa_inject_delref(spa_t *spa)
3054 mutex_enter(&spa_namespace_lock);
3055 spa->spa_inject_ref--;
3056 mutex_exit(&spa_namespace_lock);
3060 * Add spares device information to the nvlist.
3063 spa_add_spares(spa_t *spa, nvlist_t *config)
3073 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
3075 if (spa->spa_spares.sav_count == 0)
3078 VERIFY(nvlist_lookup_nvlist(config,
3079 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
3080 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
3081 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
3083 VERIFY(nvlist_add_nvlist_array(nvroot,
3084 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
3085 VERIFY(nvlist_lookup_nvlist_array(nvroot,
3086 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
3089 * Go through and find any spares which have since been
3090 * repurposed as an active spare. If this is the case, update
3091 * their status appropriately.
3093 for (i = 0; i < nspares; i++) {
3094 VERIFY(nvlist_lookup_uint64(spares[i],
3095 ZPOOL_CONFIG_GUID, &guid) == 0);
3096 if (spa_spare_exists(guid, &pool, NULL) &&
3098 VERIFY(nvlist_lookup_uint64_array(
3099 spares[i], ZPOOL_CONFIG_VDEV_STATS,
3100 (uint64_t **)&vs, &vsc) == 0);
3101 vs->vs_state = VDEV_STATE_CANT_OPEN;
3102 vs->vs_aux = VDEV_AUX_SPARED;
3109 * Add l2cache device information to the nvlist, including vdev stats.
3112 spa_add_l2cache(spa_t *spa, nvlist_t *config)
3115 uint_t i, j, nl2cache;
3122 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
3124 if (spa->spa_l2cache.sav_count == 0)
3127 VERIFY(nvlist_lookup_nvlist(config,
3128 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
3129 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
3130 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
3131 if (nl2cache != 0) {
3132 VERIFY(nvlist_add_nvlist_array(nvroot,
3133 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
3134 VERIFY(nvlist_lookup_nvlist_array(nvroot,
3135 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
3138 * Update level 2 cache device stats.
3141 for (i = 0; i < nl2cache; i++) {
3142 VERIFY(nvlist_lookup_uint64(l2cache[i],
3143 ZPOOL_CONFIG_GUID, &guid) == 0);
3146 for (j = 0; j < spa->spa_l2cache.sav_count; j++) {
3148 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) {
3149 vd = spa->spa_l2cache.sav_vdevs[j];
3155 VERIFY(nvlist_lookup_uint64_array(l2cache[i],
3156 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc)
3158 vdev_get_stats(vd, vs);
3164 spa_add_feature_stats(spa_t *spa, nvlist_t *config)
3170 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
3171 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3173 /* We may be unable to read features if pool is suspended. */
3174 if (spa_suspended(spa))
3177 if (spa->spa_feat_for_read_obj != 0) {
3178 for (zap_cursor_init(&zc, spa->spa_meta_objset,
3179 spa->spa_feat_for_read_obj);
3180 zap_cursor_retrieve(&zc, &za) == 0;
3181 zap_cursor_advance(&zc)) {
3182 ASSERT(za.za_integer_length == sizeof (uint64_t) &&
3183 za.za_num_integers == 1);
3184 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name,
3185 za.za_first_integer));
3187 zap_cursor_fini(&zc);
3190 if (spa->spa_feat_for_write_obj != 0) {
3191 for (zap_cursor_init(&zc, spa->spa_meta_objset,
3192 spa->spa_feat_for_write_obj);
3193 zap_cursor_retrieve(&zc, &za) == 0;
3194 zap_cursor_advance(&zc)) {
3195 ASSERT(za.za_integer_length == sizeof (uint64_t) &&
3196 za.za_num_integers == 1);
3197 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name,
3198 za.za_first_integer));
3200 zap_cursor_fini(&zc);
3204 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS,
3206 nvlist_free(features);
3210 spa_get_stats(const char *name, nvlist_t **config,
3211 char *altroot, size_t buflen)
3217 error = spa_open_common(name, &spa, FTAG, NULL, config);
3221 * This still leaves a window of inconsistency where the spares
3222 * or l2cache devices could change and the config would be
3223 * self-inconsistent.
3225 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3227 if (*config != NULL) {
3228 uint64_t loadtimes[2];
3230 loadtimes[0] = spa->spa_loaded_ts.tv_sec;
3231 loadtimes[1] = spa->spa_loaded_ts.tv_nsec;
3232 VERIFY(nvlist_add_uint64_array(*config,
3233 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0);
3235 VERIFY(nvlist_add_uint64(*config,
3236 ZPOOL_CONFIG_ERRCOUNT,
3237 spa_get_errlog_size(spa)) == 0);
3239 if (spa_suspended(spa))
3240 VERIFY(nvlist_add_uint64(*config,
3241 ZPOOL_CONFIG_SUSPENDED,
3242 spa->spa_failmode) == 0);
3244 spa_add_spares(spa, *config);
3245 spa_add_l2cache(spa, *config);
3246 spa_add_feature_stats(spa, *config);
3251 * We want to get the alternate root even for faulted pools, so we cheat
3252 * and call spa_lookup() directly.
3256 mutex_enter(&spa_namespace_lock);
3257 spa = spa_lookup(name);
3259 spa_altroot(spa, altroot, buflen);
3263 mutex_exit(&spa_namespace_lock);
3265 spa_altroot(spa, altroot, buflen);
3270 spa_config_exit(spa, SCL_CONFIG, FTAG);
3271 spa_close(spa, FTAG);
3278 * Validate that the auxiliary device array is well formed. We must have an
3279 * array of nvlists, each which describes a valid leaf vdev. If this is an
3280 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
3281 * specified, as long as they are well-formed.
3284 spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode,
3285 spa_aux_vdev_t *sav, const char *config, uint64_t version,
3286 vdev_labeltype_t label)
3293 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
3296 * It's acceptable to have no devs specified.
3298 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0)
3302 return (SET_ERROR(EINVAL));
3305 * Make sure the pool is formatted with a version that supports this
3308 if (spa_version(spa) < version)
3309 return (SET_ERROR(ENOTSUP));
3312 * Set the pending device list so we correctly handle device in-use
3315 sav->sav_pending = dev;
3316 sav->sav_npending = ndev;
3318 for (i = 0; i < ndev; i++) {
3319 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0,
3323 if (!vd->vdev_ops->vdev_op_leaf) {
3325 error = SET_ERROR(EINVAL);
3330 * The L2ARC currently only supports disk devices in
3331 * kernel context. For user-level testing, we allow it.
3334 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) &&
3335 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) {
3336 error = SET_ERROR(ENOTBLK);
3343 if ((error = vdev_open(vd)) == 0 &&
3344 (error = vdev_label_init(vd, crtxg, label)) == 0) {
3345 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID,
3346 vd->vdev_guid) == 0);
3352 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE))
3359 sav->sav_pending = NULL;
3360 sav->sav_npending = 0;
3365 spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode)
3369 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
3371 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode,
3372 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES,
3373 VDEV_LABEL_SPARE)) != 0) {
3377 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode,
3378 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE,
3379 VDEV_LABEL_L2CACHE));
3383 spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs,
3388 if (sav->sav_config != NULL) {
3394 * Generate new dev list by concatentating with the
3397 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config,
3398 &olddevs, &oldndevs) == 0);
3400 newdevs = kmem_alloc(sizeof (void *) *
3401 (ndevs + oldndevs), KM_SLEEP);
3402 for (i = 0; i < oldndevs; i++)
3403 VERIFY(nvlist_dup(olddevs[i], &newdevs[i],
3405 for (i = 0; i < ndevs; i++)
3406 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs],
3409 VERIFY(nvlist_remove(sav->sav_config, config,
3410 DATA_TYPE_NVLIST_ARRAY) == 0);
3412 VERIFY(nvlist_add_nvlist_array(sav->sav_config,
3413 config, newdevs, ndevs + oldndevs) == 0);
3414 for (i = 0; i < oldndevs + ndevs; i++)
3415 nvlist_free(newdevs[i]);
3416 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *));
3419 * Generate a new dev list.
3421 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME,
3423 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config,
3429 * Stop and drop level 2 ARC devices
3432 spa_l2cache_drop(spa_t *spa)
3436 spa_aux_vdev_t *sav = &spa->spa_l2cache;
3438 for (i = 0; i < sav->sav_count; i++) {
3441 vd = sav->sav_vdevs[i];
3444 if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
3445 pool != 0ULL && l2arc_vdev_present(vd))
3446 l2arc_remove_vdev(vd);
3454 spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props,
3458 char *altroot = NULL;
3463 uint64_t txg = TXG_INITIAL;
3464 nvlist_t **spares, **l2cache;
3465 uint_t nspares, nl2cache;
3466 uint64_t version, obj;
3467 boolean_t has_features;
3470 * If this pool already exists, return failure.
3472 mutex_enter(&spa_namespace_lock);
3473 if (spa_lookup(pool) != NULL) {
3474 mutex_exit(&spa_namespace_lock);
3475 return (SET_ERROR(EEXIST));
3479 * Allocate a new spa_t structure.
3481 (void) nvlist_lookup_string(props,
3482 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
3483 spa = spa_add(pool, NULL, altroot);
3484 spa_activate(spa, spa_mode_global);
3486 if (props && (error = spa_prop_validate(spa, props))) {
3487 spa_deactivate(spa);
3489 mutex_exit(&spa_namespace_lock);
3493 has_features = B_FALSE;
3494 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL);
3495 elem != NULL; elem = nvlist_next_nvpair(props, elem)) {
3496 if (zpool_prop_feature(nvpair_name(elem)))
3497 has_features = B_TRUE;
3500 if (has_features || nvlist_lookup_uint64(props,
3501 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) {
3502 version = SPA_VERSION;
3504 ASSERT(SPA_VERSION_IS_SUPPORTED(version));
3506 spa->spa_first_txg = txg;
3507 spa->spa_uberblock.ub_txg = txg - 1;
3508 spa->spa_uberblock.ub_version = version;
3509 spa->spa_ubsync = spa->spa_uberblock;
3512 * Create "The Godfather" zio to hold all async IOs
3514 spa->spa_async_zio_root = zio_root(spa, NULL, NULL,
3515 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | ZIO_FLAG_GODFATHER);
3518 * Create the root vdev.
3520 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3522 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD);
3524 ASSERT(error != 0 || rvd != NULL);
3525 ASSERT(error != 0 || spa->spa_root_vdev == rvd);
3527 if (error == 0 && !zfs_allocatable_devs(nvroot))
3528 error = SET_ERROR(EINVAL);
3531 (error = vdev_create(rvd, txg, B_FALSE)) == 0 &&
3532 (error = spa_validate_aux(spa, nvroot, txg,
3533 VDEV_ALLOC_ADD)) == 0) {
3534 for (int c = 0; c < rvd->vdev_children; c++) {
3535 vdev_ashift_optimize(rvd->vdev_child[c]);
3536 vdev_metaslab_set_size(rvd->vdev_child[c]);
3537 vdev_expand(rvd->vdev_child[c], txg);
3541 spa_config_exit(spa, SCL_ALL, FTAG);
3545 spa_deactivate(spa);
3547 mutex_exit(&spa_namespace_lock);
3552 * Get the list of spares, if specified.
3554 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
3555 &spares, &nspares) == 0) {
3556 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME,
3558 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
3559 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
3560 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3561 spa_load_spares(spa);
3562 spa_config_exit(spa, SCL_ALL, FTAG);
3563 spa->spa_spares.sav_sync = B_TRUE;
3567 * Get the list of level 2 cache devices, if specified.
3569 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
3570 &l2cache, &nl2cache) == 0) {
3571 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
3572 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3573 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
3574 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
3575 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3576 spa_load_l2cache(spa);
3577 spa_config_exit(spa, SCL_ALL, FTAG);
3578 spa->spa_l2cache.sav_sync = B_TRUE;
3581 spa->spa_is_initializing = B_TRUE;
3582 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg);
3583 spa->spa_meta_objset = dp->dp_meta_objset;
3584 spa->spa_is_initializing = B_FALSE;
3587 * Create DDTs (dedup tables).
3591 spa_update_dspace(spa);
3593 tx = dmu_tx_create_assigned(dp, txg);
3596 * Create the pool config object.
3598 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset,
3599 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE,
3600 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx);
3602 if (zap_add(spa->spa_meta_objset,
3603 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG,
3604 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) {
3605 cmn_err(CE_PANIC, "failed to add pool config");
3608 if (spa_version(spa) >= SPA_VERSION_FEATURES)
3609 spa_feature_create_zap_objects(spa, tx);
3611 if (zap_add(spa->spa_meta_objset,
3612 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION,
3613 sizeof (uint64_t), 1, &version, tx) != 0) {
3614 cmn_err(CE_PANIC, "failed to add pool version");
3617 /* Newly created pools with the right version are always deflated. */
3618 if (version >= SPA_VERSION_RAIDZ_DEFLATE) {
3619 spa->spa_deflate = TRUE;
3620 if (zap_add(spa->spa_meta_objset,
3621 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
3622 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) {
3623 cmn_err(CE_PANIC, "failed to add deflate");
3628 * Create the deferred-free bpobj. Turn off compression
3629 * because sync-to-convergence takes longer if the blocksize
3632 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx);
3633 dmu_object_set_compress(spa->spa_meta_objset, obj,
3634 ZIO_COMPRESS_OFF, tx);
3635 if (zap_add(spa->spa_meta_objset,
3636 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ,
3637 sizeof (uint64_t), 1, &obj, tx) != 0) {
3638 cmn_err(CE_PANIC, "failed to add bpobj");
3640 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj,
3641 spa->spa_meta_objset, obj));
3644 * Create the pool's history object.
3646 if (version >= SPA_VERSION_ZPOOL_HISTORY)
3647 spa_history_create_obj(spa, tx);
3650 * Set pool properties.
3652 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS);
3653 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
3654 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE);
3655 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND);
3657 if (props != NULL) {
3658 spa_configfile_set(spa, props, B_FALSE);
3659 spa_sync_props(props, tx);
3664 spa->spa_sync_on = B_TRUE;
3665 txg_sync_start(spa->spa_dsl_pool);
3668 * We explicitly wait for the first transaction to complete so that our
3669 * bean counters are appropriately updated.
3671 txg_wait_synced(spa->spa_dsl_pool, txg);
3673 spa_config_sync(spa, B_FALSE, B_TRUE);
3675 spa_history_log_version(spa, "create");
3677 spa->spa_minref = refcount_count(&spa->spa_refcount);
3679 mutex_exit(&spa_namespace_lock);
3687 * Get the root pool information from the root disk, then import the root pool
3688 * during the system boot up time.
3690 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
3693 spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid)
3696 nvlist_t *nvtop, *nvroot;
3699 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0)
3703 * Add this top-level vdev to the child array.
3705 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
3707 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
3709 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0);
3712 * Put this pool's top-level vdevs into a root vdev.
3714 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3715 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
3716 VDEV_TYPE_ROOT) == 0);
3717 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0);
3718 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0);
3719 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
3723 * Replace the existing vdev_tree with the new root vdev in
3724 * this pool's configuration (remove the old, add the new).
3726 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
3727 nvlist_free(nvroot);
3732 * Walk the vdev tree and see if we can find a device with "better"
3733 * configuration. A configuration is "better" if the label on that
3734 * device has a more recent txg.
3737 spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg)
3739 for (int c = 0; c < vd->vdev_children; c++)
3740 spa_alt_rootvdev(vd->vdev_child[c], avd, txg);
3742 if (vd->vdev_ops->vdev_op_leaf) {
3746 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid,
3750 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG,
3754 * Do we have a better boot device?
3756 if (label_txg > *txg) {
3765 * Import a root pool.
3767 * For x86. devpath_list will consist of devid and/or physpath name of
3768 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3769 * The GRUB "findroot" command will return the vdev we should boot.
3771 * For Sparc, devpath_list consists the physpath name of the booting device
3772 * no matter the rootpool is a single device pool or a mirrored pool.
3774 * "/pci@1f,0/ide@d/disk@0,0:a"
3777 spa_import_rootpool(char *devpath, char *devid)
3780 vdev_t *rvd, *bvd, *avd = NULL;
3781 nvlist_t *config, *nvtop;
3787 * Read the label from the boot device and generate a configuration.
3789 config = spa_generate_rootconf(devpath, devid, &guid);
3790 #if defined(_OBP) && defined(_KERNEL)
3791 if (config == NULL) {
3792 if (strstr(devpath, "/iscsi/ssd") != NULL) {
3794 get_iscsi_bootpath_phy(devpath);
3795 config = spa_generate_rootconf(devpath, devid, &guid);
3799 if (config == NULL) {
3800 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'",
3802 return (SET_ERROR(EIO));
3805 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
3807 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0);
3809 mutex_enter(&spa_namespace_lock);
3810 if ((spa = spa_lookup(pname)) != NULL) {
3812 * Remove the existing root pool from the namespace so that we
3813 * can replace it with the correct config we just read in.
3818 spa = spa_add(pname, config, NULL);
3819 spa->spa_is_root = B_TRUE;
3820 spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
3823 * Build up a vdev tree based on the boot device's label config.
3825 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
3827 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3828 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
3829 VDEV_ALLOC_ROOTPOOL);
3830 spa_config_exit(spa, SCL_ALL, FTAG);
3832 mutex_exit(&spa_namespace_lock);
3833 nvlist_free(config);
3834 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
3840 * Get the boot vdev.
3842 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) {
3843 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu",
3844 (u_longlong_t)guid);
3845 error = SET_ERROR(ENOENT);
3850 * Determine if there is a better boot device.
3853 spa_alt_rootvdev(rvd, &avd, &txg);
3855 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please "
3856 "try booting from '%s'", avd->vdev_path);
3857 error = SET_ERROR(EINVAL);
3862 * If the boot device is part of a spare vdev then ensure that
3863 * we're booting off the active spare.
3865 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops &&
3866 !bvd->vdev_isspare) {
3867 cmn_err(CE_NOTE, "The boot device is currently spared. Please "
3868 "try booting from '%s'",
3870 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path);
3871 error = SET_ERROR(EINVAL);
3877 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3879 spa_config_exit(spa, SCL_ALL, FTAG);
3880 mutex_exit(&spa_namespace_lock);
3882 nvlist_free(config);
3888 extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs,
3892 spa_generate_rootconf(const char *name)
3894 nvlist_t **configs, **tops;
3896 nvlist_t *best_cfg, *nvtop, *nvroot;
3905 if (vdev_geom_read_pool_label(name, &configs, &count) != 0)
3908 ASSERT3U(count, !=, 0);
3910 for (i = 0; i < count; i++) {
3913 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG,
3915 if (txg > best_txg) {
3917 best_cfg = configs[i];
3922 * Multi-vdev root pool configuration discovery is not supported yet.
3925 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren);
3927 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY,
3930 tops = kmem_zalloc(nchildren * sizeof(void *), KM_SLEEP);
3931 for (i = 0; i < nchildren; i++) {
3934 if (configs[i] == NULL)
3936 VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE,
3938 nvlist_dup(nvtop, &tops[i], KM_SLEEP);
3940 for (i = 0; holes != NULL && i < nholes; i++) {
3943 if (tops[holes[i]] != NULL)
3945 nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP);
3946 VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE,
3947 VDEV_TYPE_HOLE) == 0);
3948 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID,
3950 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID,
3953 for (i = 0; i < nchildren; i++) {
3954 if (tops[i] != NULL)
3956 nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP);
3957 VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE,
3958 VDEV_TYPE_MISSING) == 0);
3959 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID,
3961 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID,
3966 * Create pool config based on the best vdev config.
3968 nvlist_dup(best_cfg, &config, KM_SLEEP);
3971 * Put this pool's top-level vdevs into a root vdev.
3973 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
3975 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3976 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
3977 VDEV_TYPE_ROOT) == 0);
3978 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0);
3979 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0);
3980 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
3981 tops, nchildren) == 0);
3984 * Replace the existing vdev_tree with the new root vdev in
3985 * this pool's configuration (remove the old, add the new).
3987 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
3990 * Drop vdev config elements that should not be present at pool level.
3992 nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64);
3993 nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64);
3995 for (i = 0; i < count; i++)
3996 nvlist_free(configs[i]);
3997 kmem_free(configs, count * sizeof(void *));
3998 for (i = 0; i < nchildren; i++)
3999 nvlist_free(tops[i]);
4000 kmem_free(tops, nchildren * sizeof(void *));
4001 nvlist_free(nvroot);
4006 spa_import_rootpool(const char *name)
4009 vdev_t *rvd, *bvd, *avd = NULL;
4010 nvlist_t *config, *nvtop;
4016 * Read the label from the boot device and generate a configuration.
4018 config = spa_generate_rootconf(name);
4020 mutex_enter(&spa_namespace_lock);
4021 if (config != NULL) {
4022 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
4023 &pname) == 0 && strcmp(name, pname) == 0);
4024 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg)
4027 if ((spa = spa_lookup(pname)) != NULL) {
4029 * Remove the existing root pool from the namespace so
4030 * that we can replace it with the correct config
4035 spa = spa_add(pname, config, NULL);
4038 * Set spa_ubsync.ub_version as it can be used in vdev_alloc()
4039 * via spa_version().
4041 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
4042 &spa->spa_ubsync.ub_version) != 0)
4043 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
4044 } else if ((spa = spa_lookup(name)) == NULL) {
4045 mutex_exit(&spa_namespace_lock);
4046 nvlist_free(config);
4047 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'",
4051 VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0);
4053 spa->spa_is_root = B_TRUE;
4054 spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
4057 * Build up a vdev tree based on the boot device's label config.
4059 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
4061 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4062 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
4063 VDEV_ALLOC_ROOTPOOL);
4064 spa_config_exit(spa, SCL_ALL, FTAG);
4066 mutex_exit(&spa_namespace_lock);
4067 nvlist_free(config);
4068 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
4073 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4075 spa_config_exit(spa, SCL_ALL, FTAG);
4076 mutex_exit(&spa_namespace_lock);
4078 nvlist_free(config);
4086 * Import a non-root pool into the system.
4089 spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags)
4092 char *altroot = NULL;
4093 spa_load_state_t state = SPA_LOAD_IMPORT;
4094 zpool_rewind_policy_t policy;
4095 uint64_t mode = spa_mode_global;
4096 uint64_t readonly = B_FALSE;
4099 nvlist_t **spares, **l2cache;
4100 uint_t nspares, nl2cache;
4103 * If a pool with this name exists, return failure.
4105 mutex_enter(&spa_namespace_lock);
4106 if (spa_lookup(pool) != NULL) {
4107 mutex_exit(&spa_namespace_lock);
4108 return (SET_ERROR(EEXIST));
4112 * Create and initialize the spa structure.
4114 (void) nvlist_lookup_string(props,
4115 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
4116 (void) nvlist_lookup_uint64(props,
4117 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly);
4120 spa = spa_add(pool, config, altroot);
4121 spa->spa_import_flags = flags;
4124 * Verbatim import - Take a pool and insert it into the namespace
4125 * as if it had been loaded at boot.
4127 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) {
4129 spa_configfile_set(spa, props, B_FALSE);
4131 spa_config_sync(spa, B_FALSE, B_TRUE);
4133 mutex_exit(&spa_namespace_lock);
4137 spa_activate(spa, mode);
4140 * Don't start async tasks until we know everything is healthy.
4142 spa_async_suspend(spa);
4144 zpool_get_rewind_policy(config, &policy);
4145 if (policy.zrp_request & ZPOOL_DO_REWIND)
4146 state = SPA_LOAD_RECOVER;
4149 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
4150 * because the user-supplied config is actually the one to trust when
4153 if (state != SPA_LOAD_RECOVER)
4154 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0;
4156 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg,
4157 policy.zrp_request);
4160 * Propagate anything learned while loading the pool and pass it
4161 * back to caller (i.e. rewind info, missing devices, etc).
4163 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO,
4164 spa->spa_load_info) == 0);
4166 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4168 * Toss any existing sparelist, as it doesn't have any validity
4169 * anymore, and conflicts with spa_has_spare().
4171 if (spa->spa_spares.sav_config) {
4172 nvlist_free(spa->spa_spares.sav_config);
4173 spa->spa_spares.sav_config = NULL;
4174 spa_load_spares(spa);
4176 if (spa->spa_l2cache.sav_config) {
4177 nvlist_free(spa->spa_l2cache.sav_config);
4178 spa->spa_l2cache.sav_config = NULL;
4179 spa_load_l2cache(spa);
4182 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
4185 error = spa_validate_aux(spa, nvroot, -1ULL,
4188 error = spa_validate_aux(spa, nvroot, -1ULL,
4189 VDEV_ALLOC_L2CACHE);
4190 spa_config_exit(spa, SCL_ALL, FTAG);
4193 spa_configfile_set(spa, props, B_FALSE);
4195 if (error != 0 || (props && spa_writeable(spa) &&
4196 (error = spa_prop_set(spa, props)))) {
4198 spa_deactivate(spa);
4200 mutex_exit(&spa_namespace_lock);
4204 spa_async_resume(spa);
4207 * Override any spares and level 2 cache devices as specified by
4208 * the user, as these may have correct device names/devids, etc.
4210 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
4211 &spares, &nspares) == 0) {
4212 if (spa->spa_spares.sav_config)
4213 VERIFY(nvlist_remove(spa->spa_spares.sav_config,
4214 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0);
4216 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config,
4217 NV_UNIQUE_NAME, KM_SLEEP) == 0);
4218 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
4219 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
4220 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4221 spa_load_spares(spa);
4222 spa_config_exit(spa, SCL_ALL, FTAG);
4223 spa->spa_spares.sav_sync = B_TRUE;
4225 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
4226 &l2cache, &nl2cache) == 0) {
4227 if (spa->spa_l2cache.sav_config)
4228 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config,
4229 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0);
4231 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
4232 NV_UNIQUE_NAME, KM_SLEEP) == 0);
4233 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
4234 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
4235 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4236 spa_load_l2cache(spa);
4237 spa_config_exit(spa, SCL_ALL, FTAG);
4238 spa->spa_l2cache.sav_sync = B_TRUE;
4242 * Check for any removed devices.
4244 if (spa->spa_autoreplace) {
4245 spa_aux_check_removed(&spa->spa_spares);
4246 spa_aux_check_removed(&spa->spa_l2cache);
4249 if (spa_writeable(spa)) {
4251 * Update the config cache to include the newly-imported pool.
4253 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
4257 * It's possible that the pool was expanded while it was exported.
4258 * We kick off an async task to handle this for us.
4260 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND);
4262 mutex_exit(&spa_namespace_lock);
4263 spa_history_log_version(spa, "import");
4267 zvol_create_minors(pool);
4274 spa_tryimport(nvlist_t *tryconfig)
4276 nvlist_t *config = NULL;
4282 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname))
4285 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state))
4289 * Create and initialize the spa structure.
4291 mutex_enter(&spa_namespace_lock);
4292 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL);
4293 spa_activate(spa, FREAD);
4296 * Pass off the heavy lifting to spa_load().
4297 * Pass TRUE for mosconfig because the user-supplied config
4298 * is actually the one to trust when doing an import.
4300 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE);
4303 * If 'tryconfig' was at least parsable, return the current config.
4305 if (spa->spa_root_vdev != NULL) {
4306 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
4307 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME,
4309 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
4311 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP,
4312 spa->spa_uberblock.ub_timestamp) == 0);
4313 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO,
4314 spa->spa_load_info) == 0);
4317 * If the bootfs property exists on this pool then we
4318 * copy it out so that external consumers can tell which
4319 * pools are bootable.
4321 if ((!error || error == EEXIST) && spa->spa_bootfs) {
4322 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
4325 * We have to play games with the name since the
4326 * pool was opened as TRYIMPORT_NAME.
4328 if (dsl_dsobj_to_dsname(spa_name(spa),
4329 spa->spa_bootfs, tmpname) == 0) {
4331 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
4333 cp = strchr(tmpname, '/');
4335 (void) strlcpy(dsname, tmpname,
4338 (void) snprintf(dsname, MAXPATHLEN,
4339 "%s/%s", poolname, ++cp);
4341 VERIFY(nvlist_add_string(config,
4342 ZPOOL_CONFIG_BOOTFS, dsname) == 0);
4343 kmem_free(dsname, MAXPATHLEN);
4345 kmem_free(tmpname, MAXPATHLEN);
4349 * Add the list of hot spares and level 2 cache devices.
4351 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
4352 spa_add_spares(spa, config);
4353 spa_add_l2cache(spa, config);
4354 spa_config_exit(spa, SCL_CONFIG, FTAG);
4358 spa_deactivate(spa);
4360 mutex_exit(&spa_namespace_lock);
4366 * Pool export/destroy
4368 * The act of destroying or exporting a pool is very simple. We make sure there
4369 * is no more pending I/O and any references to the pool are gone. Then, we
4370 * update the pool state and sync all the labels to disk, removing the
4371 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
4372 * we don't sync the labels or remove the configuration cache.
4375 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig,
4376 boolean_t force, boolean_t hardforce)
4383 if (!(spa_mode_global & FWRITE))
4384 return (SET_ERROR(EROFS));
4386 mutex_enter(&spa_namespace_lock);
4387 if ((spa = spa_lookup(pool)) == NULL) {
4388 mutex_exit(&spa_namespace_lock);
4389 return (SET_ERROR(ENOENT));
4393 * Put a hold on the pool, drop the namespace lock, stop async tasks,
4394 * reacquire the namespace lock, and see if we can export.
4396 spa_open_ref(spa, FTAG);
4397 mutex_exit(&spa_namespace_lock);
4398 spa_async_suspend(spa);
4399 mutex_enter(&spa_namespace_lock);
4400 spa_close(spa, FTAG);
4403 * The pool will be in core if it's openable,
4404 * in which case we can modify its state.
4406 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) {
4408 * Objsets may be open only because they're dirty, so we
4409 * have to force it to sync before checking spa_refcnt.
4411 txg_wait_synced(spa->spa_dsl_pool, 0);
4414 * A pool cannot be exported or destroyed if there are active
4415 * references. If we are resetting a pool, allow references by
4416 * fault injection handlers.
4418 if (!spa_refcount_zero(spa) ||
4419 (spa->spa_inject_ref != 0 &&
4420 new_state != POOL_STATE_UNINITIALIZED)) {
4421 spa_async_resume(spa);
4422 mutex_exit(&spa_namespace_lock);
4423 return (SET_ERROR(EBUSY));
4427 * A pool cannot be exported if it has an active shared spare.
4428 * This is to prevent other pools stealing the active spare
4429 * from an exported pool. At user's own will, such pool can
4430 * be forcedly exported.
4432 if (!force && new_state == POOL_STATE_EXPORTED &&
4433 spa_has_active_shared_spare(spa)) {
4434 spa_async_resume(spa);
4435 mutex_exit(&spa_namespace_lock);
4436 return (SET_ERROR(EXDEV));
4440 * We want this to be reflected on every label,
4441 * so mark them all dirty. spa_unload() will do the
4442 * final sync that pushes these changes out.
4444 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) {
4445 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4446 spa->spa_state = new_state;
4447 spa->spa_final_txg = spa_last_synced_txg(spa) +
4449 vdev_config_dirty(spa->spa_root_vdev);
4450 spa_config_exit(spa, SCL_ALL, FTAG);
4454 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY);
4456 if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
4458 spa_deactivate(spa);
4461 if (oldconfig && spa->spa_config)
4462 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0);
4464 if (new_state != POOL_STATE_UNINITIALIZED) {
4466 spa_config_sync(spa, B_TRUE, B_TRUE);
4469 mutex_exit(&spa_namespace_lock);
4475 * Destroy a storage pool.
4478 spa_destroy(char *pool)
4480 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL,
4485 * Export a storage pool.
4488 spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
4489 boolean_t hardforce)
4491 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig,
4496 * Similar to spa_export(), this unloads the spa_t without actually removing it
4497 * from the namespace in any way.
4500 spa_reset(char *pool)
4502 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL,
4507 * ==========================================================================
4508 * Device manipulation
4509 * ==========================================================================
4513 * Add a device to a storage pool.
4516 spa_vdev_add(spa_t *spa, nvlist_t *nvroot)
4520 vdev_t *rvd = spa->spa_root_vdev;
4522 nvlist_t **spares, **l2cache;
4523 uint_t nspares, nl2cache;
4525 ASSERT(spa_writeable(spa));
4527 txg = spa_vdev_enter(spa);
4529 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0,
4530 VDEV_ALLOC_ADD)) != 0)
4531 return (spa_vdev_exit(spa, NULL, txg, error));
4533 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */
4535 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares,
4539 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache,
4543 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0)
4544 return (spa_vdev_exit(spa, vd, txg, EINVAL));
4546 if (vd->vdev_children != 0 &&
4547 (error = vdev_create(vd, txg, B_FALSE)) != 0)
4548 return (spa_vdev_exit(spa, vd, txg, error));
4551 * We must validate the spares and l2cache devices after checking the
4552 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
4554 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0)
4555 return (spa_vdev_exit(spa, vd, txg, error));
4558 * Transfer each new top-level vdev from vd to rvd.
4560 for (int c = 0; c < vd->vdev_children; c++) {
4563 * Set the vdev id to the first hole, if one exists.
4565 for (id = 0; id < rvd->vdev_children; id++) {
4566 if (rvd->vdev_child[id]->vdev_ishole) {
4567 vdev_free(rvd->vdev_child[id]);
4571 tvd = vd->vdev_child[c];
4572 vdev_remove_child(vd, tvd);
4574 vdev_add_child(rvd, tvd);
4575 vdev_config_dirty(tvd);
4579 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares,
4580 ZPOOL_CONFIG_SPARES);
4581 spa_load_spares(spa);
4582 spa->spa_spares.sav_sync = B_TRUE;
4585 if (nl2cache != 0) {
4586 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache,
4587 ZPOOL_CONFIG_L2CACHE);
4588 spa_load_l2cache(spa);
4589 spa->spa_l2cache.sav_sync = B_TRUE;
4593 * We have to be careful when adding new vdevs to an existing pool.
4594 * If other threads start allocating from these vdevs before we
4595 * sync the config cache, and we lose power, then upon reboot we may
4596 * fail to open the pool because there are DVAs that the config cache
4597 * can't translate. Therefore, we first add the vdevs without
4598 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
4599 * and then let spa_config_update() initialize the new metaslabs.
4601 * spa_load() checks for added-but-not-initialized vdevs, so that
4602 * if we lose power at any point in this sequence, the remaining
4603 * steps will be completed the next time we load the pool.
4605 (void) spa_vdev_exit(spa, vd, txg, 0);
4607 mutex_enter(&spa_namespace_lock);
4608 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
4609 mutex_exit(&spa_namespace_lock);
4615 * Attach a device to a mirror. The arguments are the path to any device
4616 * in the mirror, and the nvroot for the new device. If the path specifies
4617 * a device that is not mirrored, we automatically insert the mirror vdev.
4619 * If 'replacing' is specified, the new device is intended to replace the
4620 * existing device; in this case the two devices are made into their own
4621 * mirror using the 'replacing' vdev, which is functionally identical to
4622 * the mirror vdev (it actually reuses all the same ops) but has a few
4623 * extra rules: you can't attach to it after it's been created, and upon
4624 * completion of resilvering, the first disk (the one being replaced)
4625 * is automatically detached.
4628 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing)
4630 uint64_t txg, dtl_max_txg;
4631 vdev_t *rvd = spa->spa_root_vdev;
4632 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd;
4634 char *oldvdpath, *newvdpath;
4638 ASSERT(spa_writeable(spa));
4640 txg = spa_vdev_enter(spa);
4642 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE);
4645 return (spa_vdev_exit(spa, NULL, txg, ENODEV));
4647 if (!oldvd->vdev_ops->vdev_op_leaf)
4648 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4650 pvd = oldvd->vdev_parent;
4652 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0,
4653 VDEV_ALLOC_ATTACH)) != 0)
4654 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
4656 if (newrootvd->vdev_children != 1)
4657 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
4659 newvd = newrootvd->vdev_child[0];
4661 if (!newvd->vdev_ops->vdev_op_leaf)
4662 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
4664 if ((error = vdev_create(newrootvd, txg, replacing)) != 0)
4665 return (spa_vdev_exit(spa, newrootvd, txg, error));
4668 * Spares can't replace logs
4670 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare)
4671 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4675 * For attach, the only allowable parent is a mirror or the root
4678 if (pvd->vdev_ops != &vdev_mirror_ops &&
4679 pvd->vdev_ops != &vdev_root_ops)
4680 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4682 pvops = &vdev_mirror_ops;
4685 * Active hot spares can only be replaced by inactive hot
4688 if (pvd->vdev_ops == &vdev_spare_ops &&
4689 oldvd->vdev_isspare &&
4690 !spa_has_spare(spa, newvd->vdev_guid))
4691 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4694 * If the source is a hot spare, and the parent isn't already a
4695 * spare, then we want to create a new hot spare. Otherwise, we
4696 * want to create a replacing vdev. The user is not allowed to
4697 * attach to a spared vdev child unless the 'isspare' state is
4698 * the same (spare replaces spare, non-spare replaces
4701 if (pvd->vdev_ops == &vdev_replacing_ops &&
4702 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) {
4703 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4704 } else if (pvd->vdev_ops == &vdev_spare_ops &&
4705 newvd->vdev_isspare != oldvd->vdev_isspare) {
4706 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4709 if (newvd->vdev_isspare)
4710 pvops = &vdev_spare_ops;
4712 pvops = &vdev_replacing_ops;
4716 * Make sure the new device is big enough.
4718 if (newvd->vdev_asize < vdev_get_min_asize(oldvd))
4719 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW));
4722 * The new device cannot have a higher alignment requirement
4723 * than the top-level vdev.
4725 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift)
4726 return (spa_vdev_exit(spa, newrootvd, txg, EDOM));
4729 * If this is an in-place replacement, update oldvd's path and devid
4730 * to make it distinguishable from newvd, and unopenable from now on.
4732 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) {
4733 spa_strfree(oldvd->vdev_path);
4734 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5,
4736 (void) sprintf(oldvd->vdev_path, "%s/%s",
4737 newvd->vdev_path, "old");
4738 if (oldvd->vdev_devid != NULL) {
4739 spa_strfree(oldvd->vdev_devid);
4740 oldvd->vdev_devid = NULL;
4744 /* mark the device being resilvered */
4745 newvd->vdev_resilver_txg = txg;
4748 * If the parent is not a mirror, or if we're replacing, insert the new
4749 * mirror/replacing/spare vdev above oldvd.
4751 if (pvd->vdev_ops != pvops)
4752 pvd = vdev_add_parent(oldvd, pvops);
4754 ASSERT(pvd->vdev_top->vdev_parent == rvd);
4755 ASSERT(pvd->vdev_ops == pvops);
4756 ASSERT(oldvd->vdev_parent == pvd);
4759 * Extract the new device from its root and add it to pvd.
4761 vdev_remove_child(newrootvd, newvd);
4762 newvd->vdev_id = pvd->vdev_children;
4763 newvd->vdev_crtxg = oldvd->vdev_crtxg;
4764 vdev_add_child(pvd, newvd);
4766 tvd = newvd->vdev_top;
4767 ASSERT(pvd->vdev_top == tvd);
4768 ASSERT(tvd->vdev_parent == rvd);
4770 vdev_config_dirty(tvd);
4773 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
4774 * for any dmu_sync-ed blocks. It will propagate upward when
4775 * spa_vdev_exit() calls vdev_dtl_reassess().
4777 dtl_max_txg = txg + TXG_CONCURRENT_STATES;
4779 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL,
4780 dtl_max_txg - TXG_INITIAL);
4782 if (newvd->vdev_isspare) {
4783 spa_spare_activate(newvd);
4784 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE);
4787 oldvdpath = spa_strdup(oldvd->vdev_path);
4788 newvdpath = spa_strdup(newvd->vdev_path);
4789 newvd_isspare = newvd->vdev_isspare;
4792 * Mark newvd's DTL dirty in this txg.
4794 vdev_dirty(tvd, VDD_DTL, newvd, txg);
4797 * Schedule the resilver to restart in the future. We do this to
4798 * ensure that dmu_sync-ed blocks have been stitched into the
4799 * respective datasets.
4801 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg);
4806 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0);
4808 spa_history_log_internal(spa, "vdev attach", NULL,
4809 "%s vdev=%s %s vdev=%s",
4810 replacing && newvd_isspare ? "spare in" :
4811 replacing ? "replace" : "attach", newvdpath,
4812 replacing ? "for" : "to", oldvdpath);
4814 spa_strfree(oldvdpath);
4815 spa_strfree(newvdpath);
4817 if (spa->spa_bootfs)
4818 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH);
4824 * Detach a device from a mirror or replacing vdev.
4826 * If 'replace_done' is specified, only detach if the parent
4827 * is a replacing vdev.
4830 spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done)
4834 vdev_t *rvd = spa->spa_root_vdev;
4835 vdev_t *vd, *pvd, *cvd, *tvd;
4836 boolean_t unspare = B_FALSE;
4837 uint64_t unspare_guid = 0;
4840 ASSERT(spa_writeable(spa));
4842 txg = spa_vdev_enter(spa);
4844 vd = spa_lookup_by_guid(spa, guid, B_FALSE);
4847 return (spa_vdev_exit(spa, NULL, txg, ENODEV));
4849 if (!vd->vdev_ops->vdev_op_leaf)
4850 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4852 pvd = vd->vdev_parent;
4855 * If the parent/child relationship is not as expected, don't do it.
4856 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4857 * vdev that's replacing B with C. The user's intent in replacing
4858 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4859 * the replace by detaching C, the expected behavior is to end up
4860 * M(A,B). But suppose that right after deciding to detach C,
4861 * the replacement of B completes. We would have M(A,C), and then
4862 * ask to detach C, which would leave us with just A -- not what
4863 * the user wanted. To prevent this, we make sure that the
4864 * parent/child relationship hasn't changed -- in this example,
4865 * that C's parent is still the replacing vdev R.
4867 if (pvd->vdev_guid != pguid && pguid != 0)
4868 return (spa_vdev_exit(spa, NULL, txg, EBUSY));
4871 * Only 'replacing' or 'spare' vdevs can be replaced.
4873 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops &&
4874 pvd->vdev_ops != &vdev_spare_ops)
4875 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4877 ASSERT(pvd->vdev_ops != &vdev_spare_ops ||
4878 spa_version(spa) >= SPA_VERSION_SPARES);
4881 * Only mirror, replacing, and spare vdevs support detach.
4883 if (pvd->vdev_ops != &vdev_replacing_ops &&
4884 pvd->vdev_ops != &vdev_mirror_ops &&
4885 pvd->vdev_ops != &vdev_spare_ops)
4886 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4889 * If this device has the only valid copy of some data,
4890 * we cannot safely detach it.
4892 if (vdev_dtl_required(vd))
4893 return (spa_vdev_exit(spa, NULL, txg, EBUSY));
4895 ASSERT(pvd->vdev_children >= 2);
4898 * If we are detaching the second disk from a replacing vdev, then
4899 * check to see if we changed the original vdev's path to have "/old"
4900 * at the end in spa_vdev_attach(). If so, undo that change now.
4902 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 &&
4903 vd->vdev_path != NULL) {
4904 size_t len = strlen(vd->vdev_path);
4906 for (int c = 0; c < pvd->vdev_children; c++) {
4907 cvd = pvd->vdev_child[c];
4909 if (cvd == vd || cvd->vdev_path == NULL)
4912 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 &&
4913 strcmp(cvd->vdev_path + len, "/old") == 0) {
4914 spa_strfree(cvd->vdev_path);
4915 cvd->vdev_path = spa_strdup(vd->vdev_path);
4922 * If we are detaching the original disk from a spare, then it implies
4923 * that the spare should become a real disk, and be removed from the
4924 * active spare list for the pool.
4926 if (pvd->vdev_ops == &vdev_spare_ops &&
4928 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare)
4932 * Erase the disk labels so the disk can be used for other things.
4933 * This must be done after all other error cases are handled,
4934 * but before we disembowel vd (so we can still do I/O to it).
4935 * But if we can't do it, don't treat the error as fatal --
4936 * it may be that the unwritability of the disk is the reason
4937 * it's being detached!
4939 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
4942 * Remove vd from its parent and compact the parent's children.
4944 vdev_remove_child(pvd, vd);
4945 vdev_compact_children(pvd);
4948 * Remember one of the remaining children so we can get tvd below.
4950 cvd = pvd->vdev_child[pvd->vdev_children - 1];
4953 * If we need to remove the remaining child from the list of hot spares,
4954 * do it now, marking the vdev as no longer a spare in the process.
4955 * We must do this before vdev_remove_parent(), because that can
4956 * change the GUID if it creates a new toplevel GUID. For a similar
4957 * reason, we must remove the spare now, in the same txg as the detach;
4958 * otherwise someone could attach a new sibling, change the GUID, and
4959 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
4962 ASSERT(cvd->vdev_isspare);
4963 spa_spare_remove(cvd);
4964 unspare_guid = cvd->vdev_guid;
4965 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE);
4966 cvd->vdev_unspare = B_TRUE;
4970 * If the parent mirror/replacing vdev only has one child,
4971 * the parent is no longer needed. Remove it from the tree.
4973 if (pvd->vdev_children == 1) {
4974 if (pvd->vdev_ops == &vdev_spare_ops)
4975 cvd->vdev_unspare = B_FALSE;
4976 vdev_remove_parent(cvd);
4981 * We don't set tvd until now because the parent we just removed
4982 * may have been the previous top-level vdev.
4984 tvd = cvd->vdev_top;
4985 ASSERT(tvd->vdev_parent == rvd);
4988 * Reevaluate the parent vdev state.
4990 vdev_propagate_state(cvd);
4993 * If the 'autoexpand' property is set on the pool then automatically
4994 * try to expand the size of the pool. For example if the device we
4995 * just detached was smaller than the others, it may be possible to
4996 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
4997 * first so that we can obtain the updated sizes of the leaf vdevs.
4999 if (spa->spa_autoexpand) {
5001 vdev_expand(tvd, txg);
5004 vdev_config_dirty(tvd);
5007 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
5008 * vd->vdev_detached is set and free vd's DTL object in syncing context.
5009 * But first make sure we're not on any *other* txg's DTL list, to
5010 * prevent vd from being accessed after it's freed.
5012 vdpath = spa_strdup(vd->vdev_path);
5013 for (int t = 0; t < TXG_SIZE; t++)
5014 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t);
5015 vd->vdev_detached = B_TRUE;
5016 vdev_dirty(tvd, VDD_DTL, vd, txg);
5018 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE);
5020 /* hang on to the spa before we release the lock */
5021 spa_open_ref(spa, FTAG);
5023 error = spa_vdev_exit(spa, vd, txg, 0);
5025 spa_history_log_internal(spa, "detach", NULL,
5027 spa_strfree(vdpath);
5030 * If this was the removal of the original device in a hot spare vdev,
5031 * then we want to go through and remove the device from the hot spare
5032 * list of every other pool.
5035 spa_t *altspa = NULL;
5037 mutex_enter(&spa_namespace_lock);
5038 while ((altspa = spa_next(altspa)) != NULL) {
5039 if (altspa->spa_state != POOL_STATE_ACTIVE ||
5043 spa_open_ref(altspa, FTAG);
5044 mutex_exit(&spa_namespace_lock);
5045 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE);
5046 mutex_enter(&spa_namespace_lock);
5047 spa_close(altspa, FTAG);
5049 mutex_exit(&spa_namespace_lock);
5051 /* search the rest of the vdevs for spares to remove */
5052 spa_vdev_resilver_done(spa);
5055 /* all done with the spa; OK to release */
5056 mutex_enter(&spa_namespace_lock);
5057 spa_close(spa, FTAG);
5058 mutex_exit(&spa_namespace_lock);
5064 * Split a set of devices from their mirrors, and create a new pool from them.
5067 spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
5068 nvlist_t *props, boolean_t exp)
5071 uint64_t txg, *glist;
5073 uint_t c, children, lastlog;
5074 nvlist_t **child, *nvl, *tmp;
5076 char *altroot = NULL;
5077 vdev_t *rvd, **vml = NULL; /* vdev modify list */
5078 boolean_t activate_slog;
5080 ASSERT(spa_writeable(spa));
5082 txg = spa_vdev_enter(spa);
5084 /* clear the log and flush everything up to now */
5085 activate_slog = spa_passivate_log(spa);
5086 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
5087 error = spa_offline_log(spa);
5088 txg = spa_vdev_config_enter(spa);
5091 spa_activate_log(spa);
5094 return (spa_vdev_exit(spa, NULL, txg, error));
5096 /* check new spa name before going any further */
5097 if (spa_lookup(newname) != NULL)
5098 return (spa_vdev_exit(spa, NULL, txg, EEXIST));
5101 * scan through all the children to ensure they're all mirrors
5103 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 ||
5104 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child,
5106 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
5108 /* first, check to ensure we've got the right child count */
5109 rvd = spa->spa_root_vdev;
5111 for (c = 0; c < rvd->vdev_children; c++) {
5112 vdev_t *vd = rvd->vdev_child[c];
5114 /* don't count the holes & logs as children */
5115 if (vd->vdev_islog || vd->vdev_ishole) {
5123 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children))
5124 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
5126 /* next, ensure no spare or cache devices are part of the split */
5127 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 ||
5128 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0)
5129 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
5131 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP);
5132 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP);
5134 /* then, loop over each vdev and validate it */
5135 for (c = 0; c < children; c++) {
5136 uint64_t is_hole = 0;
5138 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE,
5142 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole ||
5143 spa->spa_root_vdev->vdev_child[c]->vdev_islog) {
5146 error = SET_ERROR(EINVAL);
5151 /* which disk is going to be split? */
5152 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID,
5154 error = SET_ERROR(EINVAL);
5158 /* look it up in the spa */
5159 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE);
5160 if (vml[c] == NULL) {
5161 error = SET_ERROR(ENODEV);
5165 /* make sure there's nothing stopping the split */
5166 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops ||
5167 vml[c]->vdev_islog ||
5168 vml[c]->vdev_ishole ||
5169 vml[c]->vdev_isspare ||
5170 vml[c]->vdev_isl2cache ||
5171 !vdev_writeable(vml[c]) ||
5172 vml[c]->vdev_children != 0 ||
5173 vml[c]->vdev_state != VDEV_STATE_HEALTHY ||
5174 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) {
5175 error = SET_ERROR(EINVAL);
5179 if (vdev_dtl_required(vml[c])) {
5180 error = SET_ERROR(EBUSY);
5184 /* we need certain info from the top level */
5185 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY,
5186 vml[c]->vdev_top->vdev_ms_array) == 0);
5187 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT,
5188 vml[c]->vdev_top->vdev_ms_shift) == 0);
5189 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE,
5190 vml[c]->vdev_top->vdev_asize) == 0);
5191 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT,
5192 vml[c]->vdev_top->vdev_ashift) == 0);
5196 kmem_free(vml, children * sizeof (vdev_t *));
5197 kmem_free(glist, children * sizeof (uint64_t));
5198 return (spa_vdev_exit(spa, NULL, txg, error));
5201 /* stop writers from using the disks */
5202 for (c = 0; c < children; c++) {
5204 vml[c]->vdev_offline = B_TRUE;
5206 vdev_reopen(spa->spa_root_vdev);
5209 * Temporarily record the splitting vdevs in the spa config. This
5210 * will disappear once the config is regenerated.
5212 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
5213 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST,
5214 glist, children) == 0);
5215 kmem_free(glist, children * sizeof (uint64_t));
5217 mutex_enter(&spa->spa_props_lock);
5218 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT,
5220 mutex_exit(&spa->spa_props_lock);
5221 spa->spa_config_splitting = nvl;
5222 vdev_config_dirty(spa->spa_root_vdev);
5224 /* configure and create the new pool */
5225 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0);
5226 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
5227 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0);
5228 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION,
5229 spa_version(spa)) == 0);
5230 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG,
5231 spa->spa_config_txg) == 0);
5232 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID,
5233 spa_generate_guid(NULL)) == 0);
5234 (void) nvlist_lookup_string(props,
5235 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
5237 /* add the new pool to the namespace */
5238 newspa = spa_add(newname, config, altroot);
5239 newspa->spa_config_txg = spa->spa_config_txg;
5240 spa_set_log_state(newspa, SPA_LOG_CLEAR);
5242 /* release the spa config lock, retaining the namespace lock */
5243 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
5245 if (zio_injection_enabled)
5246 zio_handle_panic_injection(spa, FTAG, 1);
5248 spa_activate(newspa, spa_mode_global);
5249 spa_async_suspend(newspa);
5252 /* mark that we are creating new spa by splitting */
5253 newspa->spa_splitting_newspa = B_TRUE;
5255 /* create the new pool from the disks of the original pool */
5256 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE);
5258 newspa->spa_splitting_newspa = B_FALSE;
5263 /* if that worked, generate a real config for the new pool */
5264 if (newspa->spa_root_vdev != NULL) {
5265 VERIFY(nvlist_alloc(&newspa->spa_config_splitting,
5266 NV_UNIQUE_NAME, KM_SLEEP) == 0);
5267 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting,
5268 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0);
5269 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL,
5274 if (props != NULL) {
5275 spa_configfile_set(newspa, props, B_FALSE);
5276 error = spa_prop_set(newspa, props);
5281 /* flush everything */
5282 txg = spa_vdev_config_enter(newspa);
5283 vdev_config_dirty(newspa->spa_root_vdev);
5284 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG);
5286 if (zio_injection_enabled)
5287 zio_handle_panic_injection(spa, FTAG, 2);
5289 spa_async_resume(newspa);
5291 /* finally, update the original pool's config */
5292 txg = spa_vdev_config_enter(spa);
5293 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
5294 error = dmu_tx_assign(tx, TXG_WAIT);
5297 for (c = 0; c < children; c++) {
5298 if (vml[c] != NULL) {
5301 spa_history_log_internal(spa, "detach", tx,
5302 "vdev=%s", vml[c]->vdev_path);
5306 vdev_config_dirty(spa->spa_root_vdev);
5307 spa->spa_config_splitting = NULL;
5311 (void) spa_vdev_exit(spa, NULL, txg, 0);
5313 if (zio_injection_enabled)
5314 zio_handle_panic_injection(spa, FTAG, 3);
5316 /* split is complete; log a history record */
5317 spa_history_log_internal(newspa, "split", NULL,
5318 "from pool %s", spa_name(spa));
5320 kmem_free(vml, children * sizeof (vdev_t *));
5322 /* if we're not going to mount the filesystems in userland, export */
5324 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL,
5331 spa_deactivate(newspa);
5334 txg = spa_vdev_config_enter(spa);
5336 /* re-online all offlined disks */
5337 for (c = 0; c < children; c++) {
5339 vml[c]->vdev_offline = B_FALSE;
5341 vdev_reopen(spa->spa_root_vdev);
5343 nvlist_free(spa->spa_config_splitting);
5344 spa->spa_config_splitting = NULL;
5345 (void) spa_vdev_exit(spa, NULL, txg, error);
5347 kmem_free(vml, children * sizeof (vdev_t *));
5352 spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid)
5354 for (int i = 0; i < count; i++) {
5357 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID,
5360 if (guid == target_guid)
5368 spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count,
5369 nvlist_t *dev_to_remove)
5371 nvlist_t **newdev = NULL;
5374 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP);
5376 for (int i = 0, j = 0; i < count; i++) {
5377 if (dev[i] == dev_to_remove)
5379 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0);
5382 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0);
5383 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0);
5385 for (int i = 0; i < count - 1; i++)
5386 nvlist_free(newdev[i]);
5389 kmem_free(newdev, (count - 1) * sizeof (void *));
5393 * Evacuate the device.
5396 spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd)
5401 ASSERT(MUTEX_HELD(&spa_namespace_lock));
5402 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
5403 ASSERT(vd == vd->vdev_top);
5406 * Evacuate the device. We don't hold the config lock as writer
5407 * since we need to do I/O but we do keep the
5408 * spa_namespace_lock held. Once this completes the device
5409 * should no longer have any blocks allocated on it.
5411 if (vd->vdev_islog) {
5412 if (vd->vdev_stat.vs_alloc != 0)
5413 error = spa_offline_log(spa);
5415 error = SET_ERROR(ENOTSUP);
5422 * The evacuation succeeded. Remove any remaining MOS metadata
5423 * associated with this vdev, and wait for these changes to sync.
5425 ASSERT0(vd->vdev_stat.vs_alloc);
5426 txg = spa_vdev_config_enter(spa);
5427 vd->vdev_removing = B_TRUE;
5428 vdev_dirty_leaves(vd, VDD_DTL, txg);
5429 vdev_config_dirty(vd);
5430 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
5436 * Complete the removal by cleaning up the namespace.
5439 spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd)
5441 vdev_t *rvd = spa->spa_root_vdev;
5442 uint64_t id = vd->vdev_id;
5443 boolean_t last_vdev = (id == (rvd->vdev_children - 1));
5445 ASSERT(MUTEX_HELD(&spa_namespace_lock));
5446 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
5447 ASSERT(vd == vd->vdev_top);
5450 * Only remove any devices which are empty.
5452 if (vd->vdev_stat.vs_alloc != 0)
5455 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
5457 if (list_link_active(&vd->vdev_state_dirty_node))
5458 vdev_state_clean(vd);
5459 if (list_link_active(&vd->vdev_config_dirty_node))
5460 vdev_config_clean(vd);
5465 vdev_compact_children(rvd);
5467 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops);
5468 vdev_add_child(rvd, vd);
5470 vdev_config_dirty(rvd);
5473 * Reassess the health of our root vdev.
5479 * Remove a device from the pool -
5481 * Removing a device from the vdev namespace requires several steps
5482 * and can take a significant amount of time. As a result we use
5483 * the spa_vdev_config_[enter/exit] functions which allow us to
5484 * grab and release the spa_config_lock while still holding the namespace
5485 * lock. During each step the configuration is synced out.
5487 * Currently, this supports removing only hot spares, slogs, and level 2 ARC
5491 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare)
5494 metaslab_group_t *mg;
5495 nvlist_t **spares, **l2cache, *nv;
5497 uint_t nspares, nl2cache;
5499 boolean_t locked = MUTEX_HELD(&spa_namespace_lock);
5501 ASSERT(spa_writeable(spa));
5504 txg = spa_vdev_enter(spa);
5506 vd = spa_lookup_by_guid(spa, guid, B_FALSE);
5508 if (spa->spa_spares.sav_vdevs != NULL &&
5509 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
5510 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 &&
5511 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) {
5513 * Only remove the hot spare if it's not currently in use
5516 if (vd == NULL || unspare) {
5517 spa_vdev_remove_aux(spa->spa_spares.sav_config,
5518 ZPOOL_CONFIG_SPARES, spares, nspares, nv);
5519 spa_load_spares(spa);
5520 spa->spa_spares.sav_sync = B_TRUE;
5522 error = SET_ERROR(EBUSY);
5524 } else if (spa->spa_l2cache.sav_vdevs != NULL &&
5525 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
5526 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 &&
5527 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) {
5529 * Cache devices can always be removed.
5531 spa_vdev_remove_aux(spa->spa_l2cache.sav_config,
5532 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv);
5533 spa_load_l2cache(spa);
5534 spa->spa_l2cache.sav_sync = B_TRUE;
5535 } else if (vd != NULL && vd->vdev_islog) {
5537 ASSERT(vd == vd->vdev_top);
5540 * XXX - Once we have bp-rewrite this should
5541 * become the common case.
5547 * Stop allocating from this vdev.
5549 metaslab_group_passivate(mg);
5552 * Wait for the youngest allocations and frees to sync,
5553 * and then wait for the deferral of those frees to finish.
5555 spa_vdev_config_exit(spa, NULL,
5556 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG);
5559 * Attempt to evacuate the vdev.
5561 error = spa_vdev_remove_evacuate(spa, vd);
5563 txg = spa_vdev_config_enter(spa);
5566 * If we couldn't evacuate the vdev, unwind.
5569 metaslab_group_activate(mg);
5570 return (spa_vdev_exit(spa, NULL, txg, error));
5574 * Clean up the vdev namespace.
5576 spa_vdev_remove_from_namespace(spa, vd);
5578 } else if (vd != NULL) {
5580 * Normal vdevs cannot be removed (yet).
5582 error = SET_ERROR(ENOTSUP);
5585 * There is no vdev of any kind with the specified guid.
5587 error = SET_ERROR(ENOENT);
5591 return (spa_vdev_exit(spa, NULL, txg, error));
5597 * Find any device that's done replacing, or a vdev marked 'unspare' that's
5598 * currently spared, so we can detach it.
5601 spa_vdev_resilver_done_hunt(vdev_t *vd)
5603 vdev_t *newvd, *oldvd;
5605 for (int c = 0; c < vd->vdev_children; c++) {
5606 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]);
5612 * Check for a completed replacement. We always consider the first
5613 * vdev in the list to be the oldest vdev, and the last one to be
5614 * the newest (see spa_vdev_attach() for how that works). In
5615 * the case where the newest vdev is faulted, we will not automatically
5616 * remove it after a resilver completes. This is OK as it will require
5617 * user intervention to determine which disk the admin wishes to keep.
5619 if (vd->vdev_ops == &vdev_replacing_ops) {
5620 ASSERT(vd->vdev_children > 1);
5622 newvd = vd->vdev_child[vd->vdev_children - 1];
5623 oldvd = vd->vdev_child[0];
5625 if (vdev_dtl_empty(newvd, DTL_MISSING) &&
5626 vdev_dtl_empty(newvd, DTL_OUTAGE) &&
5627 !vdev_dtl_required(oldvd))
5632 * Check for a completed resilver with the 'unspare' flag set.
5634 if (vd->vdev_ops == &vdev_spare_ops) {
5635 vdev_t *first = vd->vdev_child[0];
5636 vdev_t *last = vd->vdev_child[vd->vdev_children - 1];
5638 if (last->vdev_unspare) {
5641 } else if (first->vdev_unspare) {
5648 if (oldvd != NULL &&
5649 vdev_dtl_empty(newvd, DTL_MISSING) &&
5650 vdev_dtl_empty(newvd, DTL_OUTAGE) &&
5651 !vdev_dtl_required(oldvd))
5655 * If there are more than two spares attached to a disk,
5656 * and those spares are not required, then we want to
5657 * attempt to free them up now so that they can be used
5658 * by other pools. Once we're back down to a single
5659 * disk+spare, we stop removing them.
5661 if (vd->vdev_children > 2) {
5662 newvd = vd->vdev_child[1];
5664 if (newvd->vdev_isspare && last->vdev_isspare &&
5665 vdev_dtl_empty(last, DTL_MISSING) &&
5666 vdev_dtl_empty(last, DTL_OUTAGE) &&
5667 !vdev_dtl_required(newvd))
5676 spa_vdev_resilver_done(spa_t *spa)
5678 vdev_t *vd, *pvd, *ppvd;
5679 uint64_t guid, sguid, pguid, ppguid;
5681 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
5683 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) {
5684 pvd = vd->vdev_parent;
5685 ppvd = pvd->vdev_parent;
5686 guid = vd->vdev_guid;
5687 pguid = pvd->vdev_guid;
5688 ppguid = ppvd->vdev_guid;
5691 * If we have just finished replacing a hot spared device, then
5692 * we need to detach the parent's first child (the original hot
5695 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 &&
5696 ppvd->vdev_children == 2) {
5697 ASSERT(pvd->vdev_ops == &vdev_replacing_ops);
5698 sguid = ppvd->vdev_child[1]->vdev_guid;
5700 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd));
5702 spa_config_exit(spa, SCL_ALL, FTAG);
5703 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0)
5705 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0)
5707 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
5710 spa_config_exit(spa, SCL_ALL, FTAG);
5714 * Update the stored path or FRU for this vdev.
5717 spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value,
5721 boolean_t sync = B_FALSE;
5723 ASSERT(spa_writeable(spa));
5725 spa_vdev_state_enter(spa, SCL_ALL);
5727 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
5728 return (spa_vdev_state_exit(spa, NULL, ENOENT));
5730 if (!vd->vdev_ops->vdev_op_leaf)
5731 return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
5734 if (strcmp(value, vd->vdev_path) != 0) {
5735 spa_strfree(vd->vdev_path);
5736 vd->vdev_path = spa_strdup(value);
5740 if (vd->vdev_fru == NULL) {
5741 vd->vdev_fru = spa_strdup(value);
5743 } else if (strcmp(value, vd->vdev_fru) != 0) {
5744 spa_strfree(vd->vdev_fru);
5745 vd->vdev_fru = spa_strdup(value);
5750 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0));
5754 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath)
5756 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE));
5760 spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru)
5762 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE));
5766 * ==========================================================================
5768 * ==========================================================================
5772 spa_scan_stop(spa_t *spa)
5774 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
5775 if (dsl_scan_resilvering(spa->spa_dsl_pool))
5776 return (SET_ERROR(EBUSY));
5777 return (dsl_scan_cancel(spa->spa_dsl_pool));
5781 spa_scan(spa_t *spa, pool_scan_func_t func)
5783 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
5785 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE)
5786 return (SET_ERROR(ENOTSUP));
5789 * If a resilver was requested, but there is no DTL on a
5790 * writeable leaf device, we have nothing to do.
5792 if (func == POOL_SCAN_RESILVER &&
5793 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) {
5794 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE);
5798 return (dsl_scan(spa->spa_dsl_pool, func));
5802 * ==========================================================================
5803 * SPA async task processing
5804 * ==========================================================================
5808 spa_async_remove(spa_t *spa, vdev_t *vd)
5810 if (vd->vdev_remove_wanted) {
5811 vd->vdev_remove_wanted = B_FALSE;
5812 vd->vdev_delayed_close = B_FALSE;
5813 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE);
5816 * We want to clear the stats, but we don't want to do a full
5817 * vdev_clear() as that will cause us to throw away
5818 * degraded/faulted state as well as attempt to reopen the
5819 * device, all of which is a waste.
5821 vd->vdev_stat.vs_read_errors = 0;
5822 vd->vdev_stat.vs_write_errors = 0;
5823 vd->vdev_stat.vs_checksum_errors = 0;
5825 vdev_state_dirty(vd->vdev_top);
5828 for (int c = 0; c < vd->vdev_children; c++)
5829 spa_async_remove(spa, vd->vdev_child[c]);
5833 spa_async_probe(spa_t *spa, vdev_t *vd)
5835 if (vd->vdev_probe_wanted) {
5836 vd->vdev_probe_wanted = B_FALSE;
5837 vdev_reopen(vd); /* vdev_open() does the actual probe */
5840 for (int c = 0; c < vd->vdev_children; c++)
5841 spa_async_probe(spa, vd->vdev_child[c]);
5845 spa_async_autoexpand(spa_t *spa, vdev_t *vd)
5851 if (!spa->spa_autoexpand)
5854 for (int c = 0; c < vd->vdev_children; c++) {
5855 vdev_t *cvd = vd->vdev_child[c];
5856 spa_async_autoexpand(spa, cvd);
5859 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL)
5862 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
5863 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath);
5865 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0);
5866 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0);
5868 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS,
5869 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP);
5872 kmem_free(physpath, MAXPATHLEN);
5876 spa_async_thread(void *arg)
5881 ASSERT(spa->spa_sync_on);
5883 mutex_enter(&spa->spa_async_lock);
5884 tasks = spa->spa_async_tasks;
5885 spa->spa_async_tasks &= SPA_ASYNC_REMOVE;
5886 mutex_exit(&spa->spa_async_lock);
5889 * See if the config needs to be updated.
5891 if (tasks & SPA_ASYNC_CONFIG_UPDATE) {
5892 uint64_t old_space, new_space;
5894 mutex_enter(&spa_namespace_lock);
5895 old_space = metaslab_class_get_space(spa_normal_class(spa));
5896 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
5897 new_space = metaslab_class_get_space(spa_normal_class(spa));
5898 mutex_exit(&spa_namespace_lock);
5901 * If the pool grew as a result of the config update,
5902 * then log an internal history event.
5904 if (new_space != old_space) {
5905 spa_history_log_internal(spa, "vdev online", NULL,
5906 "pool '%s' size: %llu(+%llu)",
5907 spa_name(spa), new_space, new_space - old_space);
5911 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) {
5912 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
5913 spa_async_autoexpand(spa, spa->spa_root_vdev);
5914 spa_config_exit(spa, SCL_CONFIG, FTAG);
5918 * See if any devices need to be probed.
5920 if (tasks & SPA_ASYNC_PROBE) {
5921 spa_vdev_state_enter(spa, SCL_NONE);
5922 spa_async_probe(spa, spa->spa_root_vdev);
5923 (void) spa_vdev_state_exit(spa, NULL, 0);
5927 * If any devices are done replacing, detach them.
5929 if (tasks & SPA_ASYNC_RESILVER_DONE)
5930 spa_vdev_resilver_done(spa);
5933 * Kick off a resilver.
5935 if (tasks & SPA_ASYNC_RESILVER)
5936 dsl_resilver_restart(spa->spa_dsl_pool, 0);
5939 * Let the world know that we're done.
5941 mutex_enter(&spa->spa_async_lock);
5942 spa->spa_async_thread = NULL;
5943 cv_broadcast(&spa->spa_async_cv);
5944 mutex_exit(&spa->spa_async_lock);
5949 spa_async_thread_vd(void *arg)
5954 ASSERT(spa->spa_sync_on);
5956 mutex_enter(&spa->spa_async_lock);
5957 tasks = spa->spa_async_tasks;
5959 spa->spa_async_tasks &= ~SPA_ASYNC_REMOVE;
5960 mutex_exit(&spa->spa_async_lock);
5963 * See if any devices need to be marked REMOVED.
5965 if (tasks & SPA_ASYNC_REMOVE) {
5966 spa_vdev_state_enter(spa, SCL_NONE);
5967 spa_async_remove(spa, spa->spa_root_vdev);
5968 for (int i = 0; i < spa->spa_l2cache.sav_count; i++)
5969 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]);
5970 for (int i = 0; i < spa->spa_spares.sav_count; i++)
5971 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]);
5972 (void) spa_vdev_state_exit(spa, NULL, 0);
5976 * Let the world know that we're done.
5978 mutex_enter(&spa->spa_async_lock);
5979 tasks = spa->spa_async_tasks;
5980 if ((tasks & SPA_ASYNC_REMOVE) != 0)
5982 spa->spa_async_thread_vd = NULL;
5983 cv_broadcast(&spa->spa_async_cv);
5984 mutex_exit(&spa->spa_async_lock);
5989 spa_async_suspend(spa_t *spa)
5991 mutex_enter(&spa->spa_async_lock);
5992 spa->spa_async_suspended++;
5993 while (spa->spa_async_thread != NULL &&
5994 spa->spa_async_thread_vd != NULL)
5995 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock);
5996 mutex_exit(&spa->spa_async_lock);
6000 spa_async_resume(spa_t *spa)
6002 mutex_enter(&spa->spa_async_lock);
6003 ASSERT(spa->spa_async_suspended != 0);
6004 spa->spa_async_suspended--;
6005 mutex_exit(&spa->spa_async_lock);
6009 spa_async_tasks_pending(spa_t *spa)
6011 uint_t non_config_tasks;
6013 boolean_t config_task_suspended;
6015 non_config_tasks = spa->spa_async_tasks & ~(SPA_ASYNC_CONFIG_UPDATE |
6017 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE;
6018 if (spa->spa_ccw_fail_time == 0) {
6019 config_task_suspended = B_FALSE;
6021 config_task_suspended =
6022 (gethrtime() - spa->spa_ccw_fail_time) <
6023 (zfs_ccw_retry_interval * NANOSEC);
6026 return (non_config_tasks || (config_task && !config_task_suspended));
6030 spa_async_dispatch(spa_t *spa)
6032 mutex_enter(&spa->spa_async_lock);
6033 if (spa_async_tasks_pending(spa) &&
6034 !spa->spa_async_suspended &&
6035 spa->spa_async_thread == NULL &&
6037 spa->spa_async_thread = thread_create(NULL, 0,
6038 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri);
6039 mutex_exit(&spa->spa_async_lock);
6043 spa_async_dispatch_vd(spa_t *spa)
6045 mutex_enter(&spa->spa_async_lock);
6046 if ((spa->spa_async_tasks & SPA_ASYNC_REMOVE) != 0 &&
6047 !spa->spa_async_suspended &&
6048 spa->spa_async_thread_vd == NULL &&
6050 spa->spa_async_thread_vd = thread_create(NULL, 0,
6051 spa_async_thread_vd, spa, 0, &p0, TS_RUN, maxclsyspri);
6052 mutex_exit(&spa->spa_async_lock);
6056 spa_async_request(spa_t *spa, int task)
6058 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task);
6059 mutex_enter(&spa->spa_async_lock);
6060 spa->spa_async_tasks |= task;
6061 mutex_exit(&spa->spa_async_lock);
6062 spa_async_dispatch_vd(spa);
6066 * ==========================================================================
6067 * SPA syncing routines
6068 * ==========================================================================
6072 bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
6075 bpobj_enqueue(bpo, bp, tx);
6080 spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
6084 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp,
6085 BP_GET_PSIZE(bp), zio->io_flags));
6090 * Note: this simple function is not inlined to make it easier to dtrace the
6091 * amount of time spent syncing frees.
6094 spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx)
6096 zio_t *zio = zio_root(spa, NULL, NULL, 0);
6097 bplist_iterate(bpl, spa_free_sync_cb, zio, tx);
6098 VERIFY(zio_wait(zio) == 0);
6102 * Note: this simple function is not inlined to make it easier to dtrace the
6103 * amount of time spent syncing deferred frees.
6106 spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx)
6108 zio_t *zio = zio_root(spa, NULL, NULL, 0);
6109 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj,
6110 spa_free_sync_cb, zio, tx), ==, 0);
6111 VERIFY0(zio_wait(zio));
6116 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx)
6118 char *packed = NULL;
6123 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0);
6126 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
6127 * information. This avoids the dmu_buf_will_dirty() path and
6128 * saves us a pre-read to get data we don't actually care about.
6130 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE);
6131 packed = kmem_alloc(bufsize, KM_SLEEP);
6133 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR,
6135 bzero(packed + nvsize, bufsize - nvsize);
6137 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx);
6139 kmem_free(packed, bufsize);
6141 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db));
6142 dmu_buf_will_dirty(db, tx);
6143 *(uint64_t *)db->db_data = nvsize;
6144 dmu_buf_rele(db, FTAG);
6148 spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx,
6149 const char *config, const char *entry)
6159 * Update the MOS nvlist describing the list of available devices.
6160 * spa_validate_aux() will have already made sure this nvlist is
6161 * valid and the vdevs are labeled appropriately.
6163 if (sav->sav_object == 0) {
6164 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset,
6165 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE,
6166 sizeof (uint64_t), tx);
6167 VERIFY(zap_update(spa->spa_meta_objset,
6168 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1,
6169 &sav->sav_object, tx) == 0);
6172 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
6173 if (sav->sav_count == 0) {
6174 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0);
6176 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
6177 for (i = 0; i < sav->sav_count; i++)
6178 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i],
6179 B_FALSE, VDEV_CONFIG_L2CACHE);
6180 VERIFY(nvlist_add_nvlist_array(nvroot, config, list,
6181 sav->sav_count) == 0);
6182 for (i = 0; i < sav->sav_count; i++)
6183 nvlist_free(list[i]);
6184 kmem_free(list, sav->sav_count * sizeof (void *));
6187 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx);
6188 nvlist_free(nvroot);
6190 sav->sav_sync = B_FALSE;
6194 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx)
6198 if (list_is_empty(&spa->spa_config_dirty_list))
6201 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
6203 config = spa_config_generate(spa, spa->spa_root_vdev,
6204 dmu_tx_get_txg(tx), B_FALSE);
6207 * If we're upgrading the spa version then make sure that
6208 * the config object gets updated with the correct version.
6210 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version)
6211 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION,
6212 spa->spa_uberblock.ub_version);
6214 spa_config_exit(spa, SCL_STATE, FTAG);
6216 if (spa->spa_config_syncing)
6217 nvlist_free(spa->spa_config_syncing);
6218 spa->spa_config_syncing = config;
6220 spa_sync_nvlist(spa, spa->spa_config_object, config, tx);
6224 spa_sync_version(void *arg, dmu_tx_t *tx)
6226 uint64_t *versionp = arg;
6227 uint64_t version = *versionp;
6228 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
6231 * Setting the version is special cased when first creating the pool.
6233 ASSERT(tx->tx_txg != TXG_INITIAL);
6235 ASSERT(SPA_VERSION_IS_SUPPORTED(version));
6236 ASSERT(version >= spa_version(spa));
6238 spa->spa_uberblock.ub_version = version;
6239 vdev_config_dirty(spa->spa_root_vdev);
6240 spa_history_log_internal(spa, "set", tx, "version=%lld", version);
6244 * Set zpool properties.
6247 spa_sync_props(void *arg, dmu_tx_t *tx)
6249 nvlist_t *nvp = arg;
6250 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
6251 objset_t *mos = spa->spa_meta_objset;
6252 nvpair_t *elem = NULL;
6254 mutex_enter(&spa->spa_props_lock);
6256 while ((elem = nvlist_next_nvpair(nvp, elem))) {
6258 char *strval, *fname;
6260 const char *propname;
6261 zprop_type_t proptype;
6264 switch (prop = zpool_name_to_prop(nvpair_name(elem))) {
6267 * We checked this earlier in spa_prop_validate().
6269 ASSERT(zpool_prop_feature(nvpair_name(elem)));
6271 fname = strchr(nvpair_name(elem), '@') + 1;
6272 VERIFY0(zfeature_lookup_name(fname, &fid));
6274 spa_feature_enable(spa, fid, tx);
6275 spa_history_log_internal(spa, "set", tx,
6276 "%s=enabled", nvpair_name(elem));
6279 case ZPOOL_PROP_VERSION:
6280 intval = fnvpair_value_uint64(elem);
6282 * The version is synced seperatly before other
6283 * properties and should be correct by now.
6285 ASSERT3U(spa_version(spa), >=, intval);
6288 case ZPOOL_PROP_ALTROOT:
6290 * 'altroot' is a non-persistent property. It should
6291 * have been set temporarily at creation or import time.
6293 ASSERT(spa->spa_root != NULL);
6296 case ZPOOL_PROP_READONLY:
6297 case ZPOOL_PROP_CACHEFILE:
6299 * 'readonly' and 'cachefile' are also non-persisitent
6303 case ZPOOL_PROP_COMMENT:
6304 strval = fnvpair_value_string(elem);
6305 if (spa->spa_comment != NULL)
6306 spa_strfree(spa->spa_comment);
6307 spa->spa_comment = spa_strdup(strval);
6309 * We need to dirty the configuration on all the vdevs
6310 * so that their labels get updated. It's unnecessary
6311 * to do this for pool creation since the vdev's
6312 * configuratoin has already been dirtied.
6314 if (tx->tx_txg != TXG_INITIAL)
6315 vdev_config_dirty(spa->spa_root_vdev);
6316 spa_history_log_internal(spa, "set", tx,
6317 "%s=%s", nvpair_name(elem), strval);
6321 * Set pool property values in the poolprops mos object.
6323 if (spa->spa_pool_props_object == 0) {
6324 spa->spa_pool_props_object =
6325 zap_create_link(mos, DMU_OT_POOL_PROPS,
6326 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS,
6330 /* normalize the property name */
6331 propname = zpool_prop_to_name(prop);
6332 proptype = zpool_prop_get_type(prop);
6334 if (nvpair_type(elem) == DATA_TYPE_STRING) {
6335 ASSERT(proptype == PROP_TYPE_STRING);
6336 strval = fnvpair_value_string(elem);
6337 VERIFY0(zap_update(mos,
6338 spa->spa_pool_props_object, propname,
6339 1, strlen(strval) + 1, strval, tx));
6340 spa_history_log_internal(spa, "set", tx,
6341 "%s=%s", nvpair_name(elem), strval);
6342 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) {
6343 intval = fnvpair_value_uint64(elem);
6345 if (proptype == PROP_TYPE_INDEX) {
6347 VERIFY0(zpool_prop_index_to_string(
6348 prop, intval, &unused));
6350 VERIFY0(zap_update(mos,
6351 spa->spa_pool_props_object, propname,
6352 8, 1, &intval, tx));
6353 spa_history_log_internal(spa, "set", tx,
6354 "%s=%lld", nvpair_name(elem), intval);
6356 ASSERT(0); /* not allowed */
6360 case ZPOOL_PROP_DELEGATION:
6361 spa->spa_delegation = intval;
6363 case ZPOOL_PROP_BOOTFS:
6364 spa->spa_bootfs = intval;
6366 case ZPOOL_PROP_FAILUREMODE:
6367 spa->spa_failmode = intval;
6369 case ZPOOL_PROP_AUTOEXPAND:
6370 spa->spa_autoexpand = intval;
6371 if (tx->tx_txg != TXG_INITIAL)
6372 spa_async_request(spa,
6373 SPA_ASYNC_AUTOEXPAND);
6375 case ZPOOL_PROP_DEDUPDITTO:
6376 spa->spa_dedup_ditto = intval;
6385 mutex_exit(&spa->spa_props_lock);
6389 * Perform one-time upgrade on-disk changes. spa_version() does not
6390 * reflect the new version this txg, so there must be no changes this
6391 * txg to anything that the upgrade code depends on after it executes.
6392 * Therefore this must be called after dsl_pool_sync() does the sync
6396 spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx)
6398 dsl_pool_t *dp = spa->spa_dsl_pool;
6400 ASSERT(spa->spa_sync_pass == 1);
6402 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG);
6404 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN &&
6405 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) {
6406 dsl_pool_create_origin(dp, tx);
6408 /* Keeping the origin open increases spa_minref */
6409 spa->spa_minref += 3;
6412 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES &&
6413 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) {
6414 dsl_pool_upgrade_clones(dp, tx);
6417 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES &&
6418 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) {
6419 dsl_pool_upgrade_dir_clones(dp, tx);
6421 /* Keeping the freedir open increases spa_minref */
6422 spa->spa_minref += 3;
6425 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES &&
6426 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) {
6427 spa_feature_create_zap_objects(spa, tx);
6429 rrw_exit(&dp->dp_config_rwlock, FTAG);
6433 * Sync the specified transaction group. New blocks may be dirtied as
6434 * part of the process, so we iterate until it converges.
6437 spa_sync(spa_t *spa, uint64_t txg)
6439 dsl_pool_t *dp = spa->spa_dsl_pool;
6440 objset_t *mos = spa->spa_meta_objset;
6441 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK];
6442 vdev_t *rvd = spa->spa_root_vdev;
6447 VERIFY(spa_writeable(spa));
6450 * Lock out configuration changes.
6452 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
6454 spa->spa_syncing_txg = txg;
6455 spa->spa_sync_pass = 0;
6458 * If there are any pending vdev state changes, convert them
6459 * into config changes that go out with this transaction group.
6461 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
6462 while (list_head(&spa->spa_state_dirty_list) != NULL) {
6464 * We need the write lock here because, for aux vdevs,
6465 * calling vdev_config_dirty() modifies sav_config.
6466 * This is ugly and will become unnecessary when we
6467 * eliminate the aux vdev wart by integrating all vdevs
6468 * into the root vdev tree.
6470 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
6471 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER);
6472 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) {
6473 vdev_state_clean(vd);
6474 vdev_config_dirty(vd);
6476 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
6477 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER);
6479 spa_config_exit(spa, SCL_STATE, FTAG);
6481 tx = dmu_tx_create_assigned(dp, txg);
6483 spa->spa_sync_starttime = gethrtime();
6485 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid,
6486 spa->spa_sync_starttime + spa->spa_deadman_synctime));
6489 callout_reset(&spa->spa_deadman_cycid,
6490 hz * spa->spa_deadman_synctime / NANOSEC, spa_deadman, spa);
6495 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
6496 * set spa_deflate if we have no raid-z vdevs.
6498 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE &&
6499 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) {
6502 for (i = 0; i < rvd->vdev_children; i++) {
6503 vd = rvd->vdev_child[i];
6504 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE)
6507 if (i == rvd->vdev_children) {
6508 spa->spa_deflate = TRUE;
6509 VERIFY(0 == zap_add(spa->spa_meta_objset,
6510 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
6511 sizeof (uint64_t), 1, &spa->spa_deflate, tx));
6516 * If anything has changed in this txg, or if someone is waiting
6517 * for this txg to sync (eg, spa_vdev_remove()), push the
6518 * deferred frees from the previous txg. If not, leave them
6519 * alone so that we don't generate work on an otherwise idle
6522 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) ||
6523 !txg_list_empty(&dp->dp_dirty_dirs, txg) ||
6524 !txg_list_empty(&dp->dp_sync_tasks, txg) ||
6525 ((dsl_scan_active(dp->dp_scan) ||
6526 txg_sync_waiting(dp)) && !spa_shutting_down(spa))) {
6527 spa_sync_deferred_frees(spa, tx);
6531 * Iterate to convergence.
6534 int pass = ++spa->spa_sync_pass;
6536 spa_sync_config_object(spa, tx);
6537 spa_sync_aux_dev(spa, &spa->spa_spares, tx,
6538 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES);
6539 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx,
6540 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE);
6541 spa_errlog_sync(spa, txg);
6542 dsl_pool_sync(dp, txg);
6544 if (pass < zfs_sync_pass_deferred_free) {
6545 spa_sync_frees(spa, free_bpl, tx);
6547 bplist_iterate(free_bpl, bpobj_enqueue_cb,
6548 &spa->spa_deferred_bpobj, tx);
6552 dsl_scan_sync(dp, tx);
6554 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg))
6558 spa_sync_upgrades(spa, tx);
6560 } while (dmu_objset_is_dirty(mos, txg));
6563 * Rewrite the vdev configuration (which includes the uberblock)
6564 * to commit the transaction group.
6566 * If there are no dirty vdevs, we sync the uberblock to a few
6567 * random top-level vdevs that are known to be visible in the
6568 * config cache (see spa_vdev_add() for a complete description).
6569 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
6573 * We hold SCL_STATE to prevent vdev open/close/etc.
6574 * while we're attempting to write the vdev labels.
6576 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
6578 if (list_is_empty(&spa->spa_config_dirty_list)) {
6579 vdev_t *svd[SPA_DVAS_PER_BP];
6581 int children = rvd->vdev_children;
6582 int c0 = spa_get_random(children);
6584 for (int c = 0; c < children; c++) {
6585 vd = rvd->vdev_child[(c0 + c) % children];
6586 if (vd->vdev_ms_array == 0 || vd->vdev_islog)
6588 svd[svdcount++] = vd;
6589 if (svdcount == SPA_DVAS_PER_BP)
6592 error = vdev_config_sync(svd, svdcount, txg, B_FALSE);
6594 error = vdev_config_sync(svd, svdcount, txg,
6597 error = vdev_config_sync(rvd->vdev_child,
6598 rvd->vdev_children, txg, B_FALSE);
6600 error = vdev_config_sync(rvd->vdev_child,
6601 rvd->vdev_children, txg, B_TRUE);
6605 spa->spa_last_synced_guid = rvd->vdev_guid;
6607 spa_config_exit(spa, SCL_STATE, FTAG);
6611 zio_suspend(spa, NULL);
6612 zio_resume_wait(spa);
6617 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY));
6620 callout_drain(&spa->spa_deadman_cycid);
6625 * Clear the dirty config list.
6627 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL)
6628 vdev_config_clean(vd);
6631 * Now that the new config has synced transactionally,
6632 * let it become visible to the config cache.
6634 if (spa->spa_config_syncing != NULL) {
6635 spa_config_set(spa, spa->spa_config_syncing);
6636 spa->spa_config_txg = txg;
6637 spa->spa_config_syncing = NULL;
6640 spa->spa_ubsync = spa->spa_uberblock;
6642 dsl_pool_sync_done(dp, txg);
6645 * Update usable space statistics.
6647 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg)))
6648 vdev_sync_done(vd, txg);
6650 spa_update_dspace(spa);
6653 * It had better be the case that we didn't dirty anything
6654 * since vdev_config_sync().
6656 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg));
6657 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg));
6658 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg));
6660 spa->spa_sync_pass = 0;
6662 spa_config_exit(spa, SCL_CONFIG, FTAG);
6664 spa_handle_ignored_writes(spa);
6667 * If any async tasks have been requested, kick them off.
6669 spa_async_dispatch(spa);
6670 spa_async_dispatch_vd(spa);
6674 * Sync all pools. We don't want to hold the namespace lock across these
6675 * operations, so we take a reference on the spa_t and drop the lock during the
6679 spa_sync_allpools(void)
6682 mutex_enter(&spa_namespace_lock);
6683 while ((spa = spa_next(spa)) != NULL) {
6684 if (spa_state(spa) != POOL_STATE_ACTIVE ||
6685 !spa_writeable(spa) || spa_suspended(spa))
6687 spa_open_ref(spa, FTAG);
6688 mutex_exit(&spa_namespace_lock);
6689 txg_wait_synced(spa_get_dsl(spa), 0);
6690 mutex_enter(&spa_namespace_lock);
6691 spa_close(spa, FTAG);
6693 mutex_exit(&spa_namespace_lock);
6697 * ==========================================================================
6698 * Miscellaneous routines
6699 * ==========================================================================
6703 * Remove all pools in the system.
6711 * Remove all cached state. All pools should be closed now,
6712 * so every spa in the AVL tree should be unreferenced.
6714 mutex_enter(&spa_namespace_lock);
6715 while ((spa = spa_next(NULL)) != NULL) {
6717 * Stop async tasks. The async thread may need to detach
6718 * a device that's been replaced, which requires grabbing
6719 * spa_namespace_lock, so we must drop it here.
6721 spa_open_ref(spa, FTAG);
6722 mutex_exit(&spa_namespace_lock);
6723 spa_async_suspend(spa);
6724 mutex_enter(&spa_namespace_lock);
6725 spa_close(spa, FTAG);
6727 if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
6729 spa_deactivate(spa);
6733 mutex_exit(&spa_namespace_lock);
6737 spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux)
6742 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL)
6746 for (i = 0; i < spa->spa_l2cache.sav_count; i++) {
6747 vd = spa->spa_l2cache.sav_vdevs[i];
6748 if (vd->vdev_guid == guid)
6752 for (i = 0; i < spa->spa_spares.sav_count; i++) {
6753 vd = spa->spa_spares.sav_vdevs[i];
6754 if (vd->vdev_guid == guid)
6763 spa_upgrade(spa_t *spa, uint64_t version)
6765 ASSERT(spa_writeable(spa));
6767 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
6770 * This should only be called for a non-faulted pool, and since a
6771 * future version would result in an unopenable pool, this shouldn't be
6774 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version));
6775 ASSERT(version >= spa->spa_uberblock.ub_version);
6777 spa->spa_uberblock.ub_version = version;
6778 vdev_config_dirty(spa->spa_root_vdev);
6780 spa_config_exit(spa, SCL_ALL, FTAG);
6782 txg_wait_synced(spa_get_dsl(spa), 0);
6786 spa_has_spare(spa_t *spa, uint64_t guid)
6790 spa_aux_vdev_t *sav = &spa->spa_spares;
6792 for (i = 0; i < sav->sav_count; i++)
6793 if (sav->sav_vdevs[i]->vdev_guid == guid)
6796 for (i = 0; i < sav->sav_npending; i++) {
6797 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID,
6798 &spareguid) == 0 && spareguid == guid)
6806 * Check if a pool has an active shared spare device.
6807 * Note: reference count of an active spare is 2, as a spare and as a replace
6810 spa_has_active_shared_spare(spa_t *spa)
6814 spa_aux_vdev_t *sav = &spa->spa_spares;
6816 for (i = 0; i < sav->sav_count; i++) {
6817 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool,
6818 &refcnt) && pool != 0ULL && pool == spa_guid(spa) &&
6827 * Post a sysevent corresponding to the given event. The 'name' must be one of
6828 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
6829 * filled in from the spa and (optionally) the vdev. This doesn't do anything
6830 * in the userland libzpool, as we don't want consumers to misinterpret ztest
6831 * or zdb as real changes.
6834 spa_event_notify(spa_t *spa, vdev_t *vd, const char *name)
6838 sysevent_attr_list_t *attr = NULL;
6839 sysevent_value_t value;
6842 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs",
6845 value.value_type = SE_DATA_TYPE_STRING;
6846 value.value.sv_string = spa_name(spa);
6847 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0)
6850 value.value_type = SE_DATA_TYPE_UINT64;
6851 value.value.sv_uint64 = spa_guid(spa);
6852 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0)
6856 value.value_type = SE_DATA_TYPE_UINT64;
6857 value.value.sv_uint64 = vd->vdev_guid;
6858 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value,
6862 if (vd->vdev_path) {
6863 value.value_type = SE_DATA_TYPE_STRING;
6864 value.value.sv_string = vd->vdev_path;
6865 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH,
6866 &value, SE_SLEEP) != 0)
6871 if (sysevent_attach_attributes(ev, attr) != 0)
6875 (void) log_sysevent(ev, SE_SLEEP, &eid);
6879 sysevent_free_attr(attr);