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 (c) 2013, 2014, 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;
214 uint64_t size, alloc, cap, version;
215 zprop_source_t src = ZPROP_SRC_NONE;
216 spa_config_dirent_t *dp;
217 metaslab_class_t *mc = spa_normal_class(spa);
219 ASSERT(MUTEX_HELD(&spa->spa_props_lock));
222 alloc = metaslab_class_get_alloc(spa_normal_class(spa));
223 size = metaslab_class_get_space(spa_normal_class(spa));
224 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src);
225 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src);
226 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src);
227 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL,
230 spa_prop_add_list(*nvp, ZPOOL_PROP_FRAGMENTATION, NULL,
231 metaslab_class_fragmentation(mc), src);
232 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL,
233 metaslab_class_expandable_space(mc), src);
234 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL,
235 (spa_mode(spa) == FREAD), src);
237 cap = (size == 0) ? 0 : (alloc * 100 / size);
238 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src);
240 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL,
241 ddt_get_pool_dedup_ratio(spa), src);
243 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL,
244 rvd->vdev_state, src);
246 version = spa_version(spa);
247 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION))
248 src = ZPROP_SRC_DEFAULT;
250 src = ZPROP_SRC_LOCAL;
251 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src);
256 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS,
257 * when opening pools before this version freedir will be NULL.
259 if (pool->dp_free_dir != NULL) {
260 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL,
261 pool->dp_free_dir->dd_phys->dd_used_bytes, src);
263 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING,
267 if (pool->dp_leak_dir != NULL) {
268 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, NULL,
269 pool->dp_leak_dir->dd_phys->dd_used_bytes, src);
271 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED,
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 (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_BLOCKS)) {
288 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL,
289 MIN(zfs_max_recordsize, SPA_MAXBLOCKSIZE), ZPROP_SRC_NONE);
291 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL,
292 SPA_OLD_MAXBLOCKSIZE, ZPROP_SRC_NONE);
295 if ((dp = list_head(&spa->spa_config_list)) != NULL) {
296 if (dp->scd_path == NULL) {
297 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
298 "none", 0, ZPROP_SRC_LOCAL);
299 } else if (strcmp(dp->scd_path, spa_config_path) != 0) {
300 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
301 dp->scd_path, 0, ZPROP_SRC_LOCAL);
307 * Get zpool property values.
310 spa_prop_get(spa_t *spa, nvlist_t **nvp)
312 objset_t *mos = spa->spa_meta_objset;
317 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
319 mutex_enter(&spa->spa_props_lock);
322 * Get properties from the spa config.
324 spa_prop_get_config(spa, nvp);
326 /* If no pool property object, no more prop to get. */
327 if (mos == NULL || spa->spa_pool_props_object == 0) {
328 mutex_exit(&spa->spa_props_lock);
333 * Get properties from the MOS pool property object.
335 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object);
336 (err = zap_cursor_retrieve(&zc, &za)) == 0;
337 zap_cursor_advance(&zc)) {
340 zprop_source_t src = ZPROP_SRC_DEFAULT;
343 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL)
346 switch (za.za_integer_length) {
348 /* integer property */
349 if (za.za_first_integer !=
350 zpool_prop_default_numeric(prop))
351 src = ZPROP_SRC_LOCAL;
353 if (prop == ZPOOL_PROP_BOOTFS) {
355 dsl_dataset_t *ds = NULL;
357 dp = spa_get_dsl(spa);
358 dsl_pool_config_enter(dp, FTAG);
359 if (err = dsl_dataset_hold_obj(dp,
360 za.za_first_integer, FTAG, &ds)) {
361 dsl_pool_config_exit(dp, FTAG);
366 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1,
368 dsl_dataset_name(ds, strval);
369 dsl_dataset_rele(ds, FTAG);
370 dsl_pool_config_exit(dp, FTAG);
373 intval = za.za_first_integer;
376 spa_prop_add_list(*nvp, prop, strval, intval, src);
380 MAXNAMELEN + strlen(MOS_DIR_NAME) + 1);
385 /* string property */
386 strval = kmem_alloc(za.za_num_integers, KM_SLEEP);
387 err = zap_lookup(mos, spa->spa_pool_props_object,
388 za.za_name, 1, za.za_num_integers, strval);
390 kmem_free(strval, za.za_num_integers);
393 spa_prop_add_list(*nvp, prop, strval, 0, src);
394 kmem_free(strval, za.za_num_integers);
401 zap_cursor_fini(&zc);
402 mutex_exit(&spa->spa_props_lock);
404 if (err && err != ENOENT) {
414 * Validate the given pool properties nvlist and modify the list
415 * for the property values to be set.
418 spa_prop_validate(spa_t *spa, nvlist_t *props)
421 int error = 0, reset_bootfs = 0;
423 boolean_t has_feature = B_FALSE;
426 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
428 char *strval, *slash, *check, *fname;
429 const char *propname = nvpair_name(elem);
430 zpool_prop_t prop = zpool_name_to_prop(propname);
434 if (!zpool_prop_feature(propname)) {
435 error = SET_ERROR(EINVAL);
440 * Sanitize the input.
442 if (nvpair_type(elem) != DATA_TYPE_UINT64) {
443 error = SET_ERROR(EINVAL);
447 if (nvpair_value_uint64(elem, &intval) != 0) {
448 error = SET_ERROR(EINVAL);
453 error = SET_ERROR(EINVAL);
457 fname = strchr(propname, '@') + 1;
458 if (zfeature_lookup_name(fname, NULL) != 0) {
459 error = SET_ERROR(EINVAL);
463 has_feature = B_TRUE;
466 case ZPOOL_PROP_VERSION:
467 error = nvpair_value_uint64(elem, &intval);
469 (intval < spa_version(spa) ||
470 intval > SPA_VERSION_BEFORE_FEATURES ||
472 error = SET_ERROR(EINVAL);
475 case ZPOOL_PROP_DELEGATION:
476 case ZPOOL_PROP_AUTOREPLACE:
477 case ZPOOL_PROP_LISTSNAPS:
478 case ZPOOL_PROP_AUTOEXPAND:
479 error = nvpair_value_uint64(elem, &intval);
480 if (!error && intval > 1)
481 error = SET_ERROR(EINVAL);
484 case ZPOOL_PROP_BOOTFS:
486 * If the pool version is less than SPA_VERSION_BOOTFS,
487 * or the pool is still being created (version == 0),
488 * the bootfs property cannot be set.
490 if (spa_version(spa) < SPA_VERSION_BOOTFS) {
491 error = SET_ERROR(ENOTSUP);
496 * Make sure the vdev config is bootable
498 if (!vdev_is_bootable(spa->spa_root_vdev)) {
499 error = SET_ERROR(ENOTSUP);
505 error = nvpair_value_string(elem, &strval);
511 if (strval == NULL || strval[0] == '\0') {
512 objnum = zpool_prop_default_numeric(
517 if (error = dmu_objset_hold(strval, FTAG, &os))
521 * Must be ZPL, and its property settings
522 * must be supported by GRUB (compression
523 * is not gzip, and large blocks are not used).
526 if (dmu_objset_type(os) != DMU_OST_ZFS) {
527 error = SET_ERROR(ENOTSUP);
529 dsl_prop_get_int_ds(dmu_objset_ds(os),
530 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
532 !BOOTFS_COMPRESS_VALID(propval)) {
533 error = SET_ERROR(ENOTSUP);
535 dsl_prop_get_int_ds(dmu_objset_ds(os),
536 zfs_prop_to_name(ZFS_PROP_RECORDSIZE),
538 propval > SPA_OLD_MAXBLOCKSIZE) {
539 error = SET_ERROR(ENOTSUP);
541 objnum = dmu_objset_id(os);
543 dmu_objset_rele(os, FTAG);
547 case ZPOOL_PROP_FAILUREMODE:
548 error = nvpair_value_uint64(elem, &intval);
549 if (!error && (intval < ZIO_FAILURE_MODE_WAIT ||
550 intval > ZIO_FAILURE_MODE_PANIC))
551 error = SET_ERROR(EINVAL);
554 * This is a special case which only occurs when
555 * the pool has completely failed. This allows
556 * the user to change the in-core failmode property
557 * without syncing it out to disk (I/Os might
558 * currently be blocked). We do this by returning
559 * EIO to the caller (spa_prop_set) to trick it
560 * into thinking we encountered a property validation
563 if (!error && spa_suspended(spa)) {
564 spa->spa_failmode = intval;
565 error = SET_ERROR(EIO);
569 case ZPOOL_PROP_CACHEFILE:
570 if ((error = nvpair_value_string(elem, &strval)) != 0)
573 if (strval[0] == '\0')
576 if (strcmp(strval, "none") == 0)
579 if (strval[0] != '/') {
580 error = SET_ERROR(EINVAL);
584 slash = strrchr(strval, '/');
585 ASSERT(slash != NULL);
587 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 ||
588 strcmp(slash, "/..") == 0)
589 error = SET_ERROR(EINVAL);
592 case ZPOOL_PROP_COMMENT:
593 if ((error = nvpair_value_string(elem, &strval)) != 0)
595 for (check = strval; *check != '\0'; check++) {
597 * The kernel doesn't have an easy isprint()
598 * check. For this kernel check, we merely
599 * check ASCII apart from DEL. Fix this if
600 * there is an easy-to-use kernel isprint().
602 if (*check >= 0x7f) {
603 error = SET_ERROR(EINVAL);
608 if (strlen(strval) > ZPROP_MAX_COMMENT)
612 case ZPOOL_PROP_DEDUPDITTO:
613 if (spa_version(spa) < SPA_VERSION_DEDUP)
614 error = SET_ERROR(ENOTSUP);
616 error = nvpair_value_uint64(elem, &intval);
618 intval != 0 && intval < ZIO_DEDUPDITTO_MIN)
619 error = SET_ERROR(EINVAL);
627 if (!error && reset_bootfs) {
628 error = nvlist_remove(props,
629 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING);
632 error = nvlist_add_uint64(props,
633 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum);
641 spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync)
644 spa_config_dirent_t *dp;
646 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE),
650 dp = kmem_alloc(sizeof (spa_config_dirent_t),
653 if (cachefile[0] == '\0')
654 dp->scd_path = spa_strdup(spa_config_path);
655 else if (strcmp(cachefile, "none") == 0)
658 dp->scd_path = spa_strdup(cachefile);
660 list_insert_head(&spa->spa_config_list, dp);
662 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
666 spa_prop_set(spa_t *spa, nvlist_t *nvp)
669 nvpair_t *elem = NULL;
670 boolean_t need_sync = B_FALSE;
672 if ((error = spa_prop_validate(spa, nvp)) != 0)
675 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) {
676 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem));
678 if (prop == ZPOOL_PROP_CACHEFILE ||
679 prop == ZPOOL_PROP_ALTROOT ||
680 prop == ZPOOL_PROP_READONLY)
683 if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) {
686 if (prop == ZPOOL_PROP_VERSION) {
687 VERIFY(nvpair_value_uint64(elem, &ver) == 0);
689 ASSERT(zpool_prop_feature(nvpair_name(elem)));
690 ver = SPA_VERSION_FEATURES;
694 /* Save time if the version is already set. */
695 if (ver == spa_version(spa))
699 * In addition to the pool directory object, we might
700 * create the pool properties object, the features for
701 * read object, the features for write object, or the
702 * feature descriptions object.
704 error = dsl_sync_task(spa->spa_name, NULL,
705 spa_sync_version, &ver,
706 6, ZFS_SPACE_CHECK_RESERVED);
717 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props,
718 nvp, 6, ZFS_SPACE_CHECK_RESERVED));
725 * If the bootfs property value is dsobj, clear it.
728 spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx)
730 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) {
731 VERIFY(zap_remove(spa->spa_meta_objset,
732 spa->spa_pool_props_object,
733 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0);
740 spa_change_guid_check(void *arg, dmu_tx_t *tx)
742 uint64_t *newguid = arg;
743 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
744 vdev_t *rvd = spa->spa_root_vdev;
747 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
748 vdev_state = rvd->vdev_state;
749 spa_config_exit(spa, SCL_STATE, FTAG);
751 if (vdev_state != VDEV_STATE_HEALTHY)
752 return (SET_ERROR(ENXIO));
754 ASSERT3U(spa_guid(spa), !=, *newguid);
760 spa_change_guid_sync(void *arg, dmu_tx_t *tx)
762 uint64_t *newguid = arg;
763 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
765 vdev_t *rvd = spa->spa_root_vdev;
767 oldguid = spa_guid(spa);
769 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
770 rvd->vdev_guid = *newguid;
771 rvd->vdev_guid_sum += (*newguid - oldguid);
772 vdev_config_dirty(rvd);
773 spa_config_exit(spa, SCL_STATE, FTAG);
775 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu",
780 * Change the GUID for the pool. This is done so that we can later
781 * re-import a pool built from a clone of our own vdevs. We will modify
782 * the root vdev's guid, our own pool guid, and then mark all of our
783 * vdevs dirty. Note that we must make sure that all our vdevs are
784 * online when we do this, or else any vdevs that weren't present
785 * would be orphaned from our pool. We are also going to issue a
786 * sysevent to update any watchers.
789 spa_change_guid(spa_t *spa)
794 mutex_enter(&spa->spa_vdev_top_lock);
795 mutex_enter(&spa_namespace_lock);
796 guid = spa_generate_guid(NULL);
798 error = dsl_sync_task(spa->spa_name, spa_change_guid_check,
799 spa_change_guid_sync, &guid, 5, ZFS_SPACE_CHECK_RESERVED);
802 spa_config_sync(spa, B_FALSE, B_TRUE);
803 spa_event_notify(spa, NULL, ESC_ZFS_POOL_REGUID);
806 mutex_exit(&spa_namespace_lock);
807 mutex_exit(&spa->spa_vdev_top_lock);
813 * ==========================================================================
814 * SPA state manipulation (open/create/destroy/import/export)
815 * ==========================================================================
819 spa_error_entry_compare(const void *a, const void *b)
821 spa_error_entry_t *sa = (spa_error_entry_t *)a;
822 spa_error_entry_t *sb = (spa_error_entry_t *)b;
825 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark,
826 sizeof (zbookmark_phys_t));
837 * Utility function which retrieves copies of the current logs and
838 * re-initializes them in the process.
841 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub)
843 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock));
845 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t));
846 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t));
848 avl_create(&spa->spa_errlist_scrub,
849 spa_error_entry_compare, sizeof (spa_error_entry_t),
850 offsetof(spa_error_entry_t, se_avl));
851 avl_create(&spa->spa_errlist_last,
852 spa_error_entry_compare, sizeof (spa_error_entry_t),
853 offsetof(spa_error_entry_t, se_avl));
857 spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q)
859 const zio_taskq_info_t *ztip = &zio_taskqs[t][q];
860 enum zti_modes mode = ztip->zti_mode;
861 uint_t value = ztip->zti_value;
862 uint_t count = ztip->zti_count;
863 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q];
866 boolean_t batch = B_FALSE;
868 if (mode == ZTI_MODE_NULL) {
870 tqs->stqs_taskq = NULL;
874 ASSERT3U(count, >, 0);
876 tqs->stqs_count = count;
877 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP);
881 ASSERT3U(value, >=, 1);
882 value = MAX(value, 1);
887 flags |= TASKQ_THREADS_CPU_PCT;
888 value = zio_taskq_batch_pct;
892 panic("unrecognized mode for %s_%s taskq (%u:%u) in "
894 zio_type_name[t], zio_taskq_types[q], mode, value);
898 for (uint_t i = 0; i < count; i++) {
902 (void) snprintf(name, sizeof (name), "%s_%s_%u",
903 zio_type_name[t], zio_taskq_types[q], i);
905 (void) snprintf(name, sizeof (name), "%s_%s",
906 zio_type_name[t], zio_taskq_types[q]);
910 if (zio_taskq_sysdc && spa->spa_proc != &p0) {
912 flags |= TASKQ_DC_BATCH;
914 tq = taskq_create_sysdc(name, value, 50, INT_MAX,
915 spa->spa_proc, zio_taskq_basedc, flags);
918 pri_t pri = maxclsyspri;
920 * The write issue taskq can be extremely CPU
921 * intensive. Run it at slightly lower priority
922 * than the other taskqs.
924 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE)
927 tq = taskq_create_proc(name, value, pri, 50,
928 INT_MAX, spa->spa_proc, flags);
933 tqs->stqs_taskq[i] = tq;
938 spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q)
940 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q];
942 if (tqs->stqs_taskq == NULL) {
943 ASSERT0(tqs->stqs_count);
947 for (uint_t i = 0; i < tqs->stqs_count; i++) {
948 ASSERT3P(tqs->stqs_taskq[i], !=, NULL);
949 taskq_destroy(tqs->stqs_taskq[i]);
952 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *));
953 tqs->stqs_taskq = NULL;
957 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority.
958 * Note that a type may have multiple discrete taskqs to avoid lock contention
959 * on the taskq itself. In that case we choose which taskq at random by using
960 * the low bits of gethrtime().
963 spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
964 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent)
966 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q];
969 ASSERT3P(tqs->stqs_taskq, !=, NULL);
970 ASSERT3U(tqs->stqs_count, !=, 0);
972 if (tqs->stqs_count == 1) {
973 tq = tqs->stqs_taskq[0];
976 tq = tqs->stqs_taskq[cpu_ticks() % tqs->stqs_count];
978 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count];
982 taskq_dispatch_ent(tq, func, arg, flags, ent);
986 spa_create_zio_taskqs(spa_t *spa)
988 for (int t = 0; t < ZIO_TYPES; t++) {
989 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) {
990 spa_taskqs_init(spa, t, q);
998 spa_thread(void *arg)
1000 callb_cpr_t cprinfo;
1003 user_t *pu = PTOU(curproc);
1005 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr,
1008 ASSERT(curproc != &p0);
1009 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs),
1010 "zpool-%s", spa->spa_name);
1011 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm));
1014 /* bind this thread to the requested psrset */
1015 if (zio_taskq_psrset_bind != PS_NONE) {
1017 mutex_enter(&cpu_lock);
1018 mutex_enter(&pidlock);
1019 mutex_enter(&curproc->p_lock);
1021 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind,
1022 0, NULL, NULL) == 0) {
1023 curthread->t_bind_pset = zio_taskq_psrset_bind;
1026 "Couldn't bind process for zfs pool \"%s\" to "
1027 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind);
1030 mutex_exit(&curproc->p_lock);
1031 mutex_exit(&pidlock);
1032 mutex_exit(&cpu_lock);
1038 if (zio_taskq_sysdc) {
1039 sysdc_thread_enter(curthread, 100, 0);
1043 spa->spa_proc = curproc;
1044 spa->spa_did = curthread->t_did;
1046 spa_create_zio_taskqs(spa);
1048 mutex_enter(&spa->spa_proc_lock);
1049 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED);
1051 spa->spa_proc_state = SPA_PROC_ACTIVE;
1052 cv_broadcast(&spa->spa_proc_cv);
1054 CALLB_CPR_SAFE_BEGIN(&cprinfo);
1055 while (spa->spa_proc_state == SPA_PROC_ACTIVE)
1056 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock);
1057 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock);
1059 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE);
1060 spa->spa_proc_state = SPA_PROC_GONE;
1061 spa->spa_proc = &p0;
1062 cv_broadcast(&spa->spa_proc_cv);
1063 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */
1065 mutex_enter(&curproc->p_lock);
1068 #endif /* SPA_PROCESS */
1072 * Activate an uninitialized pool.
1075 spa_activate(spa_t *spa, int mode)
1077 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED);
1079 spa->spa_state = POOL_STATE_ACTIVE;
1080 spa->spa_mode = mode;
1082 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops);
1083 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops);
1085 /* Try to create a covering process */
1086 mutex_enter(&spa->spa_proc_lock);
1087 ASSERT(spa->spa_proc_state == SPA_PROC_NONE);
1088 ASSERT(spa->spa_proc == &p0);
1092 /* Only create a process if we're going to be around a while. */
1093 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) {
1094 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri,
1096 spa->spa_proc_state = SPA_PROC_CREATED;
1097 while (spa->spa_proc_state == SPA_PROC_CREATED) {
1098 cv_wait(&spa->spa_proc_cv,
1099 &spa->spa_proc_lock);
1101 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE);
1102 ASSERT(spa->spa_proc != &p0);
1103 ASSERT(spa->spa_did != 0);
1107 "Couldn't create process for zfs pool \"%s\"\n",
1112 #endif /* SPA_PROCESS */
1113 mutex_exit(&spa->spa_proc_lock);
1115 /* If we didn't create a process, we need to create our taskqs. */
1116 ASSERT(spa->spa_proc == &p0);
1117 if (spa->spa_proc == &p0) {
1118 spa_create_zio_taskqs(spa);
1122 * Start TRIM thread.
1124 trim_thread_create(spa);
1126 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t),
1127 offsetof(vdev_t, vdev_config_dirty_node));
1128 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t),
1129 offsetof(vdev_t, vdev_state_dirty_node));
1131 txg_list_create(&spa->spa_vdev_txg_list,
1132 offsetof(struct vdev, vdev_txg_node));
1134 avl_create(&spa->spa_errlist_scrub,
1135 spa_error_entry_compare, sizeof (spa_error_entry_t),
1136 offsetof(spa_error_entry_t, se_avl));
1137 avl_create(&spa->spa_errlist_last,
1138 spa_error_entry_compare, sizeof (spa_error_entry_t),
1139 offsetof(spa_error_entry_t, se_avl));
1143 * Opposite of spa_activate().
1146 spa_deactivate(spa_t *spa)
1148 ASSERT(spa->spa_sync_on == B_FALSE);
1149 ASSERT(spa->spa_dsl_pool == NULL);
1150 ASSERT(spa->spa_root_vdev == NULL);
1151 ASSERT(spa->spa_async_zio_root == NULL);
1152 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED);
1155 * Stop TRIM thread in case spa_unload() wasn't called directly
1156 * before spa_deactivate().
1158 trim_thread_destroy(spa);
1160 txg_list_destroy(&spa->spa_vdev_txg_list);
1162 list_destroy(&spa->spa_config_dirty_list);
1163 list_destroy(&spa->spa_state_dirty_list);
1165 for (int t = 0; t < ZIO_TYPES; t++) {
1166 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) {
1167 spa_taskqs_fini(spa, t, q);
1171 metaslab_class_destroy(spa->spa_normal_class);
1172 spa->spa_normal_class = NULL;
1174 metaslab_class_destroy(spa->spa_log_class);
1175 spa->spa_log_class = NULL;
1178 * If this was part of an import or the open otherwise failed, we may
1179 * still have errors left in the queues. Empty them just in case.
1181 spa_errlog_drain(spa);
1183 avl_destroy(&spa->spa_errlist_scrub);
1184 avl_destroy(&spa->spa_errlist_last);
1186 spa->spa_state = POOL_STATE_UNINITIALIZED;
1188 mutex_enter(&spa->spa_proc_lock);
1189 if (spa->spa_proc_state != SPA_PROC_NONE) {
1190 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE);
1191 spa->spa_proc_state = SPA_PROC_DEACTIVATE;
1192 cv_broadcast(&spa->spa_proc_cv);
1193 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) {
1194 ASSERT(spa->spa_proc != &p0);
1195 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock);
1197 ASSERT(spa->spa_proc_state == SPA_PROC_GONE);
1198 spa->spa_proc_state = SPA_PROC_NONE;
1200 ASSERT(spa->spa_proc == &p0);
1201 mutex_exit(&spa->spa_proc_lock);
1205 * We want to make sure spa_thread() has actually exited the ZFS
1206 * module, so that the module can't be unloaded out from underneath
1209 if (spa->spa_did != 0) {
1210 thread_join(spa->spa_did);
1213 #endif /* SPA_PROCESS */
1217 * Verify a pool configuration, and construct the vdev tree appropriately. This
1218 * will create all the necessary vdevs in the appropriate layout, with each vdev
1219 * in the CLOSED state. This will prep the pool before open/creation/import.
1220 * All vdev validation is done by the vdev_alloc() routine.
1223 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent,
1224 uint_t id, int atype)
1230 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0)
1233 if ((*vdp)->vdev_ops->vdev_op_leaf)
1236 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
1239 if (error == ENOENT)
1245 return (SET_ERROR(EINVAL));
1248 for (int c = 0; c < children; c++) {
1250 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c,
1258 ASSERT(*vdp != NULL);
1264 * Opposite of spa_load().
1267 spa_unload(spa_t *spa)
1271 ASSERT(MUTEX_HELD(&spa_namespace_lock));
1276 trim_thread_destroy(spa);
1281 spa_async_suspend(spa);
1286 if (spa->spa_sync_on) {
1287 txg_sync_stop(spa->spa_dsl_pool);
1288 spa->spa_sync_on = B_FALSE;
1292 * Wait for any outstanding async I/O to complete.
1294 if (spa->spa_async_zio_root != NULL) {
1295 for (int i = 0; i < max_ncpus; i++)
1296 (void) zio_wait(spa->spa_async_zio_root[i]);
1297 kmem_free(spa->spa_async_zio_root, max_ncpus * sizeof (void *));
1298 spa->spa_async_zio_root = NULL;
1301 bpobj_close(&spa->spa_deferred_bpobj);
1303 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1308 if (spa->spa_root_vdev)
1309 vdev_free(spa->spa_root_vdev);
1310 ASSERT(spa->spa_root_vdev == NULL);
1313 * Close the dsl pool.
1315 if (spa->spa_dsl_pool) {
1316 dsl_pool_close(spa->spa_dsl_pool);
1317 spa->spa_dsl_pool = NULL;
1318 spa->spa_meta_objset = NULL;
1325 * Drop and purge level 2 cache
1327 spa_l2cache_drop(spa);
1329 for (i = 0; i < spa->spa_spares.sav_count; i++)
1330 vdev_free(spa->spa_spares.sav_vdevs[i]);
1331 if (spa->spa_spares.sav_vdevs) {
1332 kmem_free(spa->spa_spares.sav_vdevs,
1333 spa->spa_spares.sav_count * sizeof (void *));
1334 spa->spa_spares.sav_vdevs = NULL;
1336 if (spa->spa_spares.sav_config) {
1337 nvlist_free(spa->spa_spares.sav_config);
1338 spa->spa_spares.sav_config = NULL;
1340 spa->spa_spares.sav_count = 0;
1342 for (i = 0; i < spa->spa_l2cache.sav_count; i++) {
1343 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]);
1344 vdev_free(spa->spa_l2cache.sav_vdevs[i]);
1346 if (spa->spa_l2cache.sav_vdevs) {
1347 kmem_free(spa->spa_l2cache.sav_vdevs,
1348 spa->spa_l2cache.sav_count * sizeof (void *));
1349 spa->spa_l2cache.sav_vdevs = NULL;
1351 if (spa->spa_l2cache.sav_config) {
1352 nvlist_free(spa->spa_l2cache.sav_config);
1353 spa->spa_l2cache.sav_config = NULL;
1355 spa->spa_l2cache.sav_count = 0;
1357 spa->spa_async_suspended = 0;
1359 if (spa->spa_comment != NULL) {
1360 spa_strfree(spa->spa_comment);
1361 spa->spa_comment = NULL;
1364 spa_config_exit(spa, SCL_ALL, FTAG);
1368 * Load (or re-load) the current list of vdevs describing the active spares for
1369 * this pool. When this is called, we have some form of basic information in
1370 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1371 * then re-generate a more complete list including status information.
1374 spa_load_spares(spa_t *spa)
1381 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1384 * First, close and free any existing spare vdevs.
1386 for (i = 0; i < spa->spa_spares.sav_count; i++) {
1387 vd = spa->spa_spares.sav_vdevs[i];
1389 /* Undo the call to spa_activate() below */
1390 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
1391 B_FALSE)) != NULL && tvd->vdev_isspare)
1392 spa_spare_remove(tvd);
1397 if (spa->spa_spares.sav_vdevs)
1398 kmem_free(spa->spa_spares.sav_vdevs,
1399 spa->spa_spares.sav_count * sizeof (void *));
1401 if (spa->spa_spares.sav_config == NULL)
1404 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
1405 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
1407 spa->spa_spares.sav_count = (int)nspares;
1408 spa->spa_spares.sav_vdevs = NULL;
1414 * Construct the array of vdevs, opening them to get status in the
1415 * process. For each spare, there is potentially two different vdev_t
1416 * structures associated with it: one in the list of spares (used only
1417 * for basic validation purposes) and one in the active vdev
1418 * configuration (if it's spared in). During this phase we open and
1419 * validate each vdev on the spare list. If the vdev also exists in the
1420 * active configuration, then we also mark this vdev as an active spare.
1422 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *),
1424 for (i = 0; i < spa->spa_spares.sav_count; i++) {
1425 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0,
1426 VDEV_ALLOC_SPARE) == 0);
1429 spa->spa_spares.sav_vdevs[i] = vd;
1431 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
1432 B_FALSE)) != NULL) {
1433 if (!tvd->vdev_isspare)
1437 * We only mark the spare active if we were successfully
1438 * able to load the vdev. Otherwise, importing a pool
1439 * with a bad active spare would result in strange
1440 * behavior, because multiple pool would think the spare
1441 * is actively in use.
1443 * There is a vulnerability here to an equally bizarre
1444 * circumstance, where a dead active spare is later
1445 * brought back to life (onlined or otherwise). Given
1446 * the rarity of this scenario, and the extra complexity
1447 * it adds, we ignore the possibility.
1449 if (!vdev_is_dead(tvd))
1450 spa_spare_activate(tvd);
1454 vd->vdev_aux = &spa->spa_spares;
1456 if (vdev_open(vd) != 0)
1459 if (vdev_validate_aux(vd) == 0)
1464 * Recompute the stashed list of spares, with status information
1467 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES,
1468 DATA_TYPE_NVLIST_ARRAY) == 0);
1470 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *),
1472 for (i = 0; i < spa->spa_spares.sav_count; i++)
1473 spares[i] = vdev_config_generate(spa,
1474 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE);
1475 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
1476 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0);
1477 for (i = 0; i < spa->spa_spares.sav_count; i++)
1478 nvlist_free(spares[i]);
1479 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *));
1483 * Load (or re-load) the current list of vdevs describing the active l2cache for
1484 * this pool. When this is called, we have some form of basic information in
1485 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1486 * then re-generate a more complete list including status information.
1487 * Devices which are already active have their details maintained, and are
1491 spa_load_l2cache(spa_t *spa)
1495 int i, j, oldnvdevs;
1497 vdev_t *vd, **oldvdevs, **newvdevs;
1498 spa_aux_vdev_t *sav = &spa->spa_l2cache;
1500 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1502 if (sav->sav_config != NULL) {
1503 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config,
1504 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
1505 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP);
1511 oldvdevs = sav->sav_vdevs;
1512 oldnvdevs = sav->sav_count;
1513 sav->sav_vdevs = NULL;
1517 * Process new nvlist of vdevs.
1519 for (i = 0; i < nl2cache; i++) {
1520 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID,
1524 for (j = 0; j < oldnvdevs; j++) {
1526 if (vd != NULL && guid == vd->vdev_guid) {
1528 * Retain previous vdev for add/remove ops.
1536 if (newvdevs[i] == NULL) {
1540 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0,
1541 VDEV_ALLOC_L2CACHE) == 0);
1546 * Commit this vdev as an l2cache device,
1547 * even if it fails to open.
1549 spa_l2cache_add(vd);
1554 spa_l2cache_activate(vd);
1556 if (vdev_open(vd) != 0)
1559 (void) vdev_validate_aux(vd);
1561 if (!vdev_is_dead(vd))
1562 l2arc_add_vdev(spa, vd);
1567 * Purge vdevs that were dropped
1569 for (i = 0; i < oldnvdevs; i++) {
1574 ASSERT(vd->vdev_isl2cache);
1576 if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
1577 pool != 0ULL && l2arc_vdev_present(vd))
1578 l2arc_remove_vdev(vd);
1579 vdev_clear_stats(vd);
1585 kmem_free(oldvdevs, oldnvdevs * sizeof (void *));
1587 if (sav->sav_config == NULL)
1590 sav->sav_vdevs = newvdevs;
1591 sav->sav_count = (int)nl2cache;
1594 * Recompute the stashed list of l2cache devices, with status
1595 * information this time.
1597 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE,
1598 DATA_TYPE_NVLIST_ARRAY) == 0);
1600 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
1601 for (i = 0; i < sav->sav_count; i++)
1602 l2cache[i] = vdev_config_generate(spa,
1603 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE);
1604 VERIFY(nvlist_add_nvlist_array(sav->sav_config,
1605 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0);
1607 for (i = 0; i < sav->sav_count; i++)
1608 nvlist_free(l2cache[i]);
1610 kmem_free(l2cache, sav->sav_count * sizeof (void *));
1614 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value)
1617 char *packed = NULL;
1622 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db);
1625 nvsize = *(uint64_t *)db->db_data;
1626 dmu_buf_rele(db, FTAG);
1628 packed = kmem_alloc(nvsize, KM_SLEEP);
1629 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed,
1632 error = nvlist_unpack(packed, nvsize, value, 0);
1633 kmem_free(packed, nvsize);
1639 * Checks to see if the given vdev could not be opened, in which case we post a
1640 * sysevent to notify the autoreplace code that the device has been removed.
1643 spa_check_removed(vdev_t *vd)
1645 for (int c = 0; c < vd->vdev_children; c++)
1646 spa_check_removed(vd->vdev_child[c]);
1648 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) &&
1650 zfs_post_autoreplace(vd->vdev_spa, vd);
1651 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK);
1656 * Validate the current config against the MOS config
1659 spa_config_valid(spa_t *spa, nvlist_t *config)
1661 vdev_t *mrvd, *rvd = spa->spa_root_vdev;
1664 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0);
1666 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1667 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0);
1669 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children);
1672 * If we're doing a normal import, then build up any additional
1673 * diagnostic information about missing devices in this config.
1674 * We'll pass this up to the user for further processing.
1676 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) {
1677 nvlist_t **child, *nv;
1680 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **),
1682 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1684 for (int c = 0; c < rvd->vdev_children; c++) {
1685 vdev_t *tvd = rvd->vdev_child[c];
1686 vdev_t *mtvd = mrvd->vdev_child[c];
1688 if (tvd->vdev_ops == &vdev_missing_ops &&
1689 mtvd->vdev_ops != &vdev_missing_ops &&
1691 child[idx++] = vdev_config_generate(spa, mtvd,
1696 VERIFY(nvlist_add_nvlist_array(nv,
1697 ZPOOL_CONFIG_CHILDREN, child, idx) == 0);
1698 VERIFY(nvlist_add_nvlist(spa->spa_load_info,
1699 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0);
1701 for (int i = 0; i < idx; i++)
1702 nvlist_free(child[i]);
1705 kmem_free(child, rvd->vdev_children * sizeof (char **));
1709 * Compare the root vdev tree with the information we have
1710 * from the MOS config (mrvd). Check each top-level vdev
1711 * with the corresponding MOS config top-level (mtvd).
1713 for (int c = 0; c < rvd->vdev_children; c++) {
1714 vdev_t *tvd = rvd->vdev_child[c];
1715 vdev_t *mtvd = mrvd->vdev_child[c];
1718 * Resolve any "missing" vdevs in the current configuration.
1719 * If we find that the MOS config has more accurate information
1720 * about the top-level vdev then use that vdev instead.
1722 if (tvd->vdev_ops == &vdev_missing_ops &&
1723 mtvd->vdev_ops != &vdev_missing_ops) {
1725 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG))
1729 * Device specific actions.
1731 if (mtvd->vdev_islog) {
1732 spa_set_log_state(spa, SPA_LOG_CLEAR);
1735 * XXX - once we have 'readonly' pool
1736 * support we should be able to handle
1737 * missing data devices by transitioning
1738 * the pool to readonly.
1744 * Swap the missing vdev with the data we were
1745 * able to obtain from the MOS config.
1747 vdev_remove_child(rvd, tvd);
1748 vdev_remove_child(mrvd, mtvd);
1750 vdev_add_child(rvd, mtvd);
1751 vdev_add_child(mrvd, tvd);
1753 spa_config_exit(spa, SCL_ALL, FTAG);
1755 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1758 } else if (mtvd->vdev_islog) {
1760 * Load the slog device's state from the MOS config
1761 * since it's possible that the label does not
1762 * contain the most up-to-date information.
1764 vdev_load_log_state(tvd, mtvd);
1769 spa_config_exit(spa, SCL_ALL, FTAG);
1772 * Ensure we were able to validate the config.
1774 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum);
1778 * Check for missing log devices
1781 spa_check_logs(spa_t *spa)
1783 boolean_t rv = B_FALSE;
1785 switch (spa->spa_log_state) {
1786 case SPA_LOG_MISSING:
1787 /* need to recheck in case slog has been restored */
1788 case SPA_LOG_UNKNOWN:
1789 rv = (dmu_objset_find(spa->spa_name, zil_check_log_chain,
1790 NULL, DS_FIND_CHILDREN) != 0);
1792 spa_set_log_state(spa, SPA_LOG_MISSING);
1799 spa_passivate_log(spa_t *spa)
1801 vdev_t *rvd = spa->spa_root_vdev;
1802 boolean_t slog_found = B_FALSE;
1804 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER));
1806 if (!spa_has_slogs(spa))
1809 for (int c = 0; c < rvd->vdev_children; c++) {
1810 vdev_t *tvd = rvd->vdev_child[c];
1811 metaslab_group_t *mg = tvd->vdev_mg;
1813 if (tvd->vdev_islog) {
1814 metaslab_group_passivate(mg);
1815 slog_found = B_TRUE;
1819 return (slog_found);
1823 spa_activate_log(spa_t *spa)
1825 vdev_t *rvd = spa->spa_root_vdev;
1827 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER));
1829 for (int c = 0; c < rvd->vdev_children; c++) {
1830 vdev_t *tvd = rvd->vdev_child[c];
1831 metaslab_group_t *mg = tvd->vdev_mg;
1833 if (tvd->vdev_islog)
1834 metaslab_group_activate(mg);
1839 spa_offline_log(spa_t *spa)
1843 error = dmu_objset_find(spa_name(spa), zil_vdev_offline,
1844 NULL, DS_FIND_CHILDREN);
1847 * We successfully offlined the log device, sync out the
1848 * current txg so that the "stubby" block can be removed
1851 txg_wait_synced(spa->spa_dsl_pool, 0);
1857 spa_aux_check_removed(spa_aux_vdev_t *sav)
1861 for (i = 0; i < sav->sav_count; i++)
1862 spa_check_removed(sav->sav_vdevs[i]);
1866 spa_claim_notify(zio_t *zio)
1868 spa_t *spa = zio->io_spa;
1873 mutex_enter(&spa->spa_props_lock); /* any mutex will do */
1874 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth)
1875 spa->spa_claim_max_txg = zio->io_bp->blk_birth;
1876 mutex_exit(&spa->spa_props_lock);
1879 typedef struct spa_load_error {
1880 uint64_t sle_meta_count;
1881 uint64_t sle_data_count;
1885 spa_load_verify_done(zio_t *zio)
1887 blkptr_t *bp = zio->io_bp;
1888 spa_load_error_t *sle = zio->io_private;
1889 dmu_object_type_t type = BP_GET_TYPE(bp);
1890 int error = zio->io_error;
1891 spa_t *spa = zio->io_spa;
1894 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) &&
1895 type != DMU_OT_INTENT_LOG)
1896 atomic_inc_64(&sle->sle_meta_count);
1898 atomic_inc_64(&sle->sle_data_count);
1900 zio_data_buf_free(zio->io_data, zio->io_size);
1902 mutex_enter(&spa->spa_scrub_lock);
1903 spa->spa_scrub_inflight--;
1904 cv_broadcast(&spa->spa_scrub_io_cv);
1905 mutex_exit(&spa->spa_scrub_lock);
1909 * Maximum number of concurrent scrub i/os to create while verifying
1910 * a pool while importing it.
1912 int spa_load_verify_maxinflight = 10000;
1913 boolean_t spa_load_verify_metadata = B_TRUE;
1914 boolean_t spa_load_verify_data = B_TRUE;
1916 SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_maxinflight, CTLFLAG_RWTUN,
1917 &spa_load_verify_maxinflight, 0,
1918 "Maximum number of concurrent scrub I/Os to create while verifying a "
1919 "pool while importing it");
1921 SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_metadata, CTLFLAG_RWTUN,
1922 &spa_load_verify_metadata, 0,
1923 "Check metadata on import?");
1925 SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_data, CTLFLAG_RWTUN,
1926 &spa_load_verify_data, 0,
1927 "Check user data on import?");
1931 spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
1932 const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
1934 if (BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
1937 * Note: normally this routine will not be called if
1938 * spa_load_verify_metadata is not set. However, it may be useful
1939 * to manually set the flag after the traversal has begun.
1941 if (!spa_load_verify_metadata)
1943 if (BP_GET_BUFC_TYPE(bp) == ARC_BUFC_DATA && !spa_load_verify_data)
1947 size_t size = BP_GET_PSIZE(bp);
1948 void *data = zio_data_buf_alloc(size);
1950 mutex_enter(&spa->spa_scrub_lock);
1951 while (spa->spa_scrub_inflight >= spa_load_verify_maxinflight)
1952 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
1953 spa->spa_scrub_inflight++;
1954 mutex_exit(&spa->spa_scrub_lock);
1956 zio_nowait(zio_read(rio, spa, bp, data, size,
1957 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB,
1958 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL |
1959 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb));
1964 spa_load_verify(spa_t *spa)
1967 spa_load_error_t sle = { 0 };
1968 zpool_rewind_policy_t policy;
1969 boolean_t verify_ok = B_FALSE;
1972 zpool_get_rewind_policy(spa->spa_config, &policy);
1974 if (policy.zrp_request & ZPOOL_NEVER_REWIND)
1977 rio = zio_root(spa, NULL, &sle,
1978 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
1980 if (spa_load_verify_metadata) {
1981 error = traverse_pool(spa, spa->spa_verify_min_txg,
1982 TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
1983 spa_load_verify_cb, rio);
1986 (void) zio_wait(rio);
1988 spa->spa_load_meta_errors = sle.sle_meta_count;
1989 spa->spa_load_data_errors = sle.sle_data_count;
1991 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta &&
1992 sle.sle_data_count <= policy.zrp_maxdata) {
1996 spa->spa_load_txg = spa->spa_uberblock.ub_txg;
1997 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp;
1999 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts;
2000 VERIFY(nvlist_add_uint64(spa->spa_load_info,
2001 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0);
2002 VERIFY(nvlist_add_int64(spa->spa_load_info,
2003 ZPOOL_CONFIG_REWIND_TIME, loss) == 0);
2004 VERIFY(nvlist_add_uint64(spa->spa_load_info,
2005 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0);
2007 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg;
2011 if (error != ENXIO && error != EIO)
2012 error = SET_ERROR(EIO);
2016 return (verify_ok ? 0 : EIO);
2020 * Find a value in the pool props object.
2023 spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val)
2025 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object,
2026 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val);
2030 * Find a value in the pool directory object.
2033 spa_dir_prop(spa_t *spa, const char *name, uint64_t *val)
2035 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
2036 name, sizeof (uint64_t), 1, val));
2040 spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err)
2042 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux);
2047 * Fix up config after a partly-completed split. This is done with the
2048 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
2049 * pool have that entry in their config, but only the splitting one contains
2050 * a list of all the guids of the vdevs that are being split off.
2052 * This function determines what to do with that list: either rejoin
2053 * all the disks to the pool, or complete the splitting process. To attempt
2054 * the rejoin, each disk that is offlined is marked online again, and
2055 * we do a reopen() call. If the vdev label for every disk that was
2056 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
2057 * then we call vdev_split() on each disk, and complete the split.
2059 * Otherwise we leave the config alone, with all the vdevs in place in
2060 * the original pool.
2063 spa_try_repair(spa_t *spa, nvlist_t *config)
2070 boolean_t attempt_reopen;
2072 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0)
2075 /* check that the config is complete */
2076 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST,
2077 &glist, &gcount) != 0)
2080 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP);
2082 /* attempt to online all the vdevs & validate */
2083 attempt_reopen = B_TRUE;
2084 for (i = 0; i < gcount; i++) {
2085 if (glist[i] == 0) /* vdev is hole */
2088 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE);
2089 if (vd[i] == NULL) {
2091 * Don't bother attempting to reopen the disks;
2092 * just do the split.
2094 attempt_reopen = B_FALSE;
2096 /* attempt to re-online it */
2097 vd[i]->vdev_offline = B_FALSE;
2101 if (attempt_reopen) {
2102 vdev_reopen(spa->spa_root_vdev);
2104 /* check each device to see what state it's in */
2105 for (extracted = 0, i = 0; i < gcount; i++) {
2106 if (vd[i] != NULL &&
2107 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL)
2114 * If every disk has been moved to the new pool, or if we never
2115 * even attempted to look at them, then we split them off for
2118 if (!attempt_reopen || gcount == extracted) {
2119 for (i = 0; i < gcount; i++)
2122 vdev_reopen(spa->spa_root_vdev);
2125 kmem_free(vd, gcount * sizeof (vdev_t *));
2129 spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type,
2130 boolean_t mosconfig)
2132 nvlist_t *config = spa->spa_config;
2133 char *ereport = FM_EREPORT_ZFS_POOL;
2139 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid))
2140 return (SET_ERROR(EINVAL));
2142 ASSERT(spa->spa_comment == NULL);
2143 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0)
2144 spa->spa_comment = spa_strdup(comment);
2147 * Versioning wasn't explicitly added to the label until later, so if
2148 * it's not present treat it as the initial version.
2150 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
2151 &spa->spa_ubsync.ub_version) != 0)
2152 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
2154 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG,
2155 &spa->spa_config_txg);
2157 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) &&
2158 spa_guid_exists(pool_guid, 0)) {
2159 error = SET_ERROR(EEXIST);
2161 spa->spa_config_guid = pool_guid;
2163 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT,
2165 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting,
2169 nvlist_free(spa->spa_load_info);
2170 spa->spa_load_info = fnvlist_alloc();
2172 gethrestime(&spa->spa_loaded_ts);
2173 error = spa_load_impl(spa, pool_guid, config, state, type,
2174 mosconfig, &ereport);
2177 spa->spa_minref = refcount_count(&spa->spa_refcount);
2179 if (error != EEXIST) {
2180 spa->spa_loaded_ts.tv_sec = 0;
2181 spa->spa_loaded_ts.tv_nsec = 0;
2183 if (error != EBADF) {
2184 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0);
2187 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE;
2194 * Load an existing storage pool, using the pool's builtin spa_config as a
2195 * source of configuration information.
2198 spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config,
2199 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig,
2203 nvlist_t *nvroot = NULL;
2206 uberblock_t *ub = &spa->spa_uberblock;
2207 uint64_t children, config_cache_txg = spa->spa_config_txg;
2208 int orig_mode = spa->spa_mode;
2211 boolean_t missing_feat_write = B_FALSE;
2214 * If this is an untrusted config, access the pool in read-only mode.
2215 * This prevents things like resilvering recently removed devices.
2218 spa->spa_mode = FREAD;
2220 ASSERT(MUTEX_HELD(&spa_namespace_lock));
2222 spa->spa_load_state = state;
2224 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot))
2225 return (SET_ERROR(EINVAL));
2227 parse = (type == SPA_IMPORT_EXISTING ?
2228 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT);
2231 * Create "The Godfather" zio to hold all async IOs
2233 spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *),
2235 for (int i = 0; i < max_ncpus; i++) {
2236 spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
2237 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
2238 ZIO_FLAG_GODFATHER);
2242 * Parse the configuration into a vdev tree. We explicitly set the
2243 * value that will be returned by spa_version() since parsing the
2244 * configuration requires knowing the version number.
2246 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2247 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse);
2248 spa_config_exit(spa, SCL_ALL, FTAG);
2253 ASSERT(spa->spa_root_vdev == rvd);
2255 if (type != SPA_IMPORT_ASSEMBLE) {
2256 ASSERT(spa_guid(spa) == pool_guid);
2260 * Try to open all vdevs, loading each label in the process.
2262 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2263 error = vdev_open(rvd);
2264 spa_config_exit(spa, SCL_ALL, FTAG);
2269 * We need to validate the vdev labels against the configuration that
2270 * we have in hand, which is dependent on the setting of mosconfig. If
2271 * mosconfig is true then we're validating the vdev labels based on
2272 * that config. Otherwise, we're validating against the cached config
2273 * (zpool.cache) that was read when we loaded the zfs module, and then
2274 * later we will recursively call spa_load() and validate against
2277 * If we're assembling a new pool that's been split off from an
2278 * existing pool, the labels haven't yet been updated so we skip
2279 * validation for now.
2281 if (type != SPA_IMPORT_ASSEMBLE) {
2282 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2283 error = vdev_validate(rvd, mosconfig);
2284 spa_config_exit(spa, SCL_ALL, FTAG);
2289 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN)
2290 return (SET_ERROR(ENXIO));
2294 * Find the best uberblock.
2296 vdev_uberblock_load(rvd, ub, &label);
2299 * If we weren't able to find a single valid uberblock, return failure.
2301 if (ub->ub_txg == 0) {
2303 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO));
2307 * If the pool has an unsupported version we can't open it.
2309 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) {
2311 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP));
2314 if (ub->ub_version >= SPA_VERSION_FEATURES) {
2318 * If we weren't able to find what's necessary for reading the
2319 * MOS in the label, return failure.
2321 if (label == NULL || nvlist_lookup_nvlist(label,
2322 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) {
2324 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA,
2329 * Update our in-core representation with the definitive values
2332 nvlist_free(spa->spa_label_features);
2333 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0);
2339 * Look through entries in the label nvlist's features_for_read. If
2340 * there is a feature listed there which we don't understand then we
2341 * cannot open a pool.
2343 if (ub->ub_version >= SPA_VERSION_FEATURES) {
2344 nvlist_t *unsup_feat;
2346 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) ==
2349 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features,
2351 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) {
2352 if (!zfeature_is_supported(nvpair_name(nvp))) {
2353 VERIFY(nvlist_add_string(unsup_feat,
2354 nvpair_name(nvp), "") == 0);
2358 if (!nvlist_empty(unsup_feat)) {
2359 VERIFY(nvlist_add_nvlist(spa->spa_load_info,
2360 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0);
2361 nvlist_free(unsup_feat);
2362 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT,
2366 nvlist_free(unsup_feat);
2370 * If the vdev guid sum doesn't match the uberblock, we have an
2371 * incomplete configuration. We first check to see if the pool
2372 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
2373 * If it is, defer the vdev_guid_sum check till later so we
2374 * can handle missing vdevs.
2376 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN,
2377 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE &&
2378 rvd->vdev_guid_sum != ub->ub_guid_sum)
2379 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO));
2381 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) {
2382 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2383 spa_try_repair(spa, config);
2384 spa_config_exit(spa, SCL_ALL, FTAG);
2385 nvlist_free(spa->spa_config_splitting);
2386 spa->spa_config_splitting = NULL;
2390 * Initialize internal SPA structures.
2392 spa->spa_state = POOL_STATE_ACTIVE;
2393 spa->spa_ubsync = spa->spa_uberblock;
2394 spa->spa_verify_min_txg = spa->spa_extreme_rewind ?
2395 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1;
2396 spa->spa_first_txg = spa->spa_last_ubsync_txg ?
2397 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1;
2398 spa->spa_claim_max_txg = spa->spa_first_txg;
2399 spa->spa_prev_software_version = ub->ub_software_version;
2401 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool);
2403 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2404 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset;
2406 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0)
2407 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2409 if (spa_version(spa) >= SPA_VERSION_FEATURES) {
2410 boolean_t missing_feat_read = B_FALSE;
2411 nvlist_t *unsup_feat, *enabled_feat;
2413 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ,
2414 &spa->spa_feat_for_read_obj) != 0) {
2415 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2418 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE,
2419 &spa->spa_feat_for_write_obj) != 0) {
2420 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2423 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS,
2424 &spa->spa_feat_desc_obj) != 0) {
2425 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2428 enabled_feat = fnvlist_alloc();
2429 unsup_feat = fnvlist_alloc();
2431 if (!spa_features_check(spa, B_FALSE,
2432 unsup_feat, enabled_feat))
2433 missing_feat_read = B_TRUE;
2435 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) {
2436 if (!spa_features_check(spa, B_TRUE,
2437 unsup_feat, enabled_feat)) {
2438 missing_feat_write = B_TRUE;
2442 fnvlist_add_nvlist(spa->spa_load_info,
2443 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat);
2445 if (!nvlist_empty(unsup_feat)) {
2446 fnvlist_add_nvlist(spa->spa_load_info,
2447 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat);
2450 fnvlist_free(enabled_feat);
2451 fnvlist_free(unsup_feat);
2453 if (!missing_feat_read) {
2454 fnvlist_add_boolean(spa->spa_load_info,
2455 ZPOOL_CONFIG_CAN_RDONLY);
2459 * If the state is SPA_LOAD_TRYIMPORT, our objective is
2460 * twofold: to determine whether the pool is available for
2461 * import in read-write mode and (if it is not) whether the
2462 * pool is available for import in read-only mode. If the pool
2463 * is available for import in read-write mode, it is displayed
2464 * as available in userland; if it is not available for import
2465 * in read-only mode, it is displayed as unavailable in
2466 * userland. If the pool is available for import in read-only
2467 * mode but not read-write mode, it is displayed as unavailable
2468 * in userland with a special note that the pool is actually
2469 * available for open in read-only mode.
2471 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are
2472 * missing a feature for write, we must first determine whether
2473 * the pool can be opened read-only before returning to
2474 * userland in order to know whether to display the
2475 * abovementioned note.
2477 if (missing_feat_read || (missing_feat_write &&
2478 spa_writeable(spa))) {
2479 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT,
2484 * Load refcounts for ZFS features from disk into an in-memory
2485 * cache during SPA initialization.
2487 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
2490 error = feature_get_refcount_from_disk(spa,
2491 &spa_feature_table[i], &refcount);
2493 spa->spa_feat_refcount_cache[i] = refcount;
2494 } else if (error == ENOTSUP) {
2495 spa->spa_feat_refcount_cache[i] =
2496 SPA_FEATURE_DISABLED;
2498 return (spa_vdev_err(rvd,
2499 VDEV_AUX_CORRUPT_DATA, EIO));
2504 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) {
2505 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG,
2506 &spa->spa_feat_enabled_txg_obj) != 0)
2507 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2510 spa->spa_is_initializing = B_TRUE;
2511 error = dsl_pool_open(spa->spa_dsl_pool);
2512 spa->spa_is_initializing = B_FALSE;
2514 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2518 nvlist_t *policy = NULL, *nvconfig;
2520 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0)
2521 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2523 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig,
2524 ZPOOL_CONFIG_HOSTID, &hostid) == 0) {
2526 unsigned long myhostid = 0;
2528 VERIFY(nvlist_lookup_string(nvconfig,
2529 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0);
2532 myhostid = zone_get_hostid(NULL);
2535 * We're emulating the system's hostid in userland, so
2536 * we can't use zone_get_hostid().
2538 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid);
2539 #endif /* _KERNEL */
2540 if (check_hostid && hostid != 0 && myhostid != 0 &&
2541 hostid != myhostid) {
2542 nvlist_free(nvconfig);
2543 cmn_err(CE_WARN, "pool '%s' could not be "
2544 "loaded as it was last accessed by "
2545 "another system (host: %s hostid: 0x%lx). "
2546 "See: http://illumos.org/msg/ZFS-8000-EY",
2547 spa_name(spa), hostname,
2548 (unsigned long)hostid);
2549 return (SET_ERROR(EBADF));
2552 if (nvlist_lookup_nvlist(spa->spa_config,
2553 ZPOOL_REWIND_POLICY, &policy) == 0)
2554 VERIFY(nvlist_add_nvlist(nvconfig,
2555 ZPOOL_REWIND_POLICY, policy) == 0);
2557 spa_config_set(spa, nvconfig);
2559 spa_deactivate(spa);
2560 spa_activate(spa, orig_mode);
2562 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE));
2565 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0)
2566 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2567 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj);
2569 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2572 * Load the bit that tells us to use the new accounting function
2573 * (raid-z deflation). If we have an older pool, this will not
2576 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate);
2577 if (error != 0 && error != ENOENT)
2578 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2580 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION,
2581 &spa->spa_creation_version);
2582 if (error != 0 && error != ENOENT)
2583 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2586 * Load the persistent error log. If we have an older pool, this will
2589 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last);
2590 if (error != 0 && error != ENOENT)
2591 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2593 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB,
2594 &spa->spa_errlog_scrub);
2595 if (error != 0 && error != ENOENT)
2596 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2599 * Load the history object. If we have an older pool, this
2600 * will not be present.
2602 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history);
2603 if (error != 0 && error != ENOENT)
2604 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2607 * If we're assembling the pool from the split-off vdevs of
2608 * an existing pool, we don't want to attach the spares & cache
2613 * Load any hot spares for this pool.
2615 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object);
2616 if (error != 0 && error != ENOENT)
2617 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2618 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) {
2619 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES);
2620 if (load_nvlist(spa, spa->spa_spares.sav_object,
2621 &spa->spa_spares.sav_config) != 0)
2622 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2624 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2625 spa_load_spares(spa);
2626 spa_config_exit(spa, SCL_ALL, FTAG);
2627 } else if (error == 0) {
2628 spa->spa_spares.sav_sync = B_TRUE;
2632 * Load any level 2 ARC devices for this pool.
2634 error = spa_dir_prop(spa, DMU_POOL_L2CACHE,
2635 &spa->spa_l2cache.sav_object);
2636 if (error != 0 && error != ENOENT)
2637 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2638 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) {
2639 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE);
2640 if (load_nvlist(spa, spa->spa_l2cache.sav_object,
2641 &spa->spa_l2cache.sav_config) != 0)
2642 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2644 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2645 spa_load_l2cache(spa);
2646 spa_config_exit(spa, SCL_ALL, FTAG);
2647 } else if (error == 0) {
2648 spa->spa_l2cache.sav_sync = B_TRUE;
2651 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
2653 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object);
2654 if (error && error != ENOENT)
2655 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2658 uint64_t autoreplace;
2660 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs);
2661 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace);
2662 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation);
2663 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode);
2664 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand);
2665 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO,
2666 &spa->spa_dedup_ditto);
2668 spa->spa_autoreplace = (autoreplace != 0);
2672 * If the 'autoreplace' property is set, then post a resource notifying
2673 * the ZFS DE that it should not issue any faults for unopenable
2674 * devices. We also iterate over the vdevs, and post a sysevent for any
2675 * unopenable vdevs so that the normal autoreplace handler can take
2678 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) {
2679 spa_check_removed(spa->spa_root_vdev);
2681 * For the import case, this is done in spa_import(), because
2682 * at this point we're using the spare definitions from
2683 * the MOS config, not necessarily from the userland config.
2685 if (state != SPA_LOAD_IMPORT) {
2686 spa_aux_check_removed(&spa->spa_spares);
2687 spa_aux_check_removed(&spa->spa_l2cache);
2692 * Load the vdev state for all toplevel vdevs.
2697 * Propagate the leaf DTLs we just loaded all the way up the tree.
2699 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2700 vdev_dtl_reassess(rvd, 0, 0, B_FALSE);
2701 spa_config_exit(spa, SCL_ALL, FTAG);
2704 * Load the DDTs (dedup tables).
2706 error = ddt_load(spa);
2708 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2710 spa_update_dspace(spa);
2713 * Validate the config, using the MOS config to fill in any
2714 * information which might be missing. If we fail to validate
2715 * the config then declare the pool unfit for use. If we're
2716 * assembling a pool from a split, the log is not transferred
2719 if (type != SPA_IMPORT_ASSEMBLE) {
2722 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0)
2723 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2725 if (!spa_config_valid(spa, nvconfig)) {
2726 nvlist_free(nvconfig);
2727 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM,
2730 nvlist_free(nvconfig);
2733 * Now that we've validated the config, check the state of the
2734 * root vdev. If it can't be opened, it indicates one or
2735 * more toplevel vdevs are faulted.
2737 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN)
2738 return (SET_ERROR(ENXIO));
2740 if (spa_check_logs(spa)) {
2741 *ereport = FM_EREPORT_ZFS_LOG_REPLAY;
2742 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO));
2746 if (missing_feat_write) {
2747 ASSERT(state == SPA_LOAD_TRYIMPORT);
2750 * At this point, we know that we can open the pool in
2751 * read-only mode but not read-write mode. We now have enough
2752 * information and can return to userland.
2754 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP));
2758 * We've successfully opened the pool, verify that we're ready
2759 * to start pushing transactions.
2761 if (state != SPA_LOAD_TRYIMPORT) {
2762 if (error = spa_load_verify(spa))
2763 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA,
2767 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER ||
2768 spa->spa_load_max_txg == UINT64_MAX)) {
2770 int need_update = B_FALSE;
2772 ASSERT(state != SPA_LOAD_TRYIMPORT);
2775 * Claim log blocks that haven't been committed yet.
2776 * This must all happen in a single txg.
2777 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2778 * invoked from zil_claim_log_block()'s i/o done callback.
2779 * Price of rollback is that we abandon the log.
2781 spa->spa_claiming = B_TRUE;
2783 tx = dmu_tx_create_assigned(spa_get_dsl(spa),
2784 spa_first_txg(spa));
2785 (void) dmu_objset_find(spa_name(spa),
2786 zil_claim, tx, DS_FIND_CHILDREN);
2789 spa->spa_claiming = B_FALSE;
2791 spa_set_log_state(spa, SPA_LOG_GOOD);
2792 spa->spa_sync_on = B_TRUE;
2793 txg_sync_start(spa->spa_dsl_pool);
2796 * Wait for all claims to sync. We sync up to the highest
2797 * claimed log block birth time so that claimed log blocks
2798 * don't appear to be from the future. spa_claim_max_txg
2799 * will have been set for us by either zil_check_log_chain()
2800 * (invoked from spa_check_logs()) or zil_claim() above.
2802 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg);
2805 * If the config cache is stale, or we have uninitialized
2806 * metaslabs (see spa_vdev_add()), then update the config.
2808 * If this is a verbatim import, trust the current
2809 * in-core spa_config and update the disk labels.
2811 if (config_cache_txg != spa->spa_config_txg ||
2812 state == SPA_LOAD_IMPORT ||
2813 state == SPA_LOAD_RECOVER ||
2814 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM))
2815 need_update = B_TRUE;
2817 for (int c = 0; c < rvd->vdev_children; c++)
2818 if (rvd->vdev_child[c]->vdev_ms_array == 0)
2819 need_update = B_TRUE;
2822 * Update the config cache asychronously in case we're the
2823 * root pool, in which case the config cache isn't writable yet.
2826 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
2829 * Check all DTLs to see if anything needs resilvering.
2831 if (!dsl_scan_resilvering(spa->spa_dsl_pool) &&
2832 vdev_resilver_needed(rvd, NULL, NULL))
2833 spa_async_request(spa, SPA_ASYNC_RESILVER);
2836 * Log the fact that we booted up (so that we can detect if
2837 * we rebooted in the middle of an operation).
2839 spa_history_log_version(spa, "open");
2842 * Delete any inconsistent datasets.
2844 (void) dmu_objset_find(spa_name(spa),
2845 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN);
2848 * Clean up any stale temporary dataset userrefs.
2850 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool);
2857 spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig)
2859 int mode = spa->spa_mode;
2862 spa_deactivate(spa);
2864 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg - 1;
2866 spa_activate(spa, mode);
2867 spa_async_suspend(spa);
2869 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig));
2873 * If spa_load() fails this function will try loading prior txg's. If
2874 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool
2875 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this
2876 * function will not rewind the pool and will return the same error as
2880 spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig,
2881 uint64_t max_request, int rewind_flags)
2883 nvlist_t *loadinfo = NULL;
2884 nvlist_t *config = NULL;
2885 int load_error, rewind_error;
2886 uint64_t safe_rewind_txg;
2889 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) {
2890 spa->spa_load_max_txg = spa->spa_load_txg;
2891 spa_set_log_state(spa, SPA_LOG_CLEAR);
2893 spa->spa_load_max_txg = max_request;
2894 if (max_request != UINT64_MAX)
2895 spa->spa_extreme_rewind = B_TRUE;
2898 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING,
2900 if (load_error == 0)
2903 if (spa->spa_root_vdev != NULL)
2904 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
2906 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg;
2907 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp;
2909 if (rewind_flags & ZPOOL_NEVER_REWIND) {
2910 nvlist_free(config);
2911 return (load_error);
2914 if (state == SPA_LOAD_RECOVER) {
2915 /* Price of rolling back is discarding txgs, including log */
2916 spa_set_log_state(spa, SPA_LOG_CLEAR);
2919 * If we aren't rolling back save the load info from our first
2920 * import attempt so that we can restore it after attempting
2923 loadinfo = spa->spa_load_info;
2924 spa->spa_load_info = fnvlist_alloc();
2927 spa->spa_load_max_txg = spa->spa_last_ubsync_txg;
2928 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE;
2929 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ?
2930 TXG_INITIAL : safe_rewind_txg;
2933 * Continue as long as we're finding errors, we're still within
2934 * the acceptable rewind range, and we're still finding uberblocks
2936 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg &&
2937 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) {
2938 if (spa->spa_load_max_txg < safe_rewind_txg)
2939 spa->spa_extreme_rewind = B_TRUE;
2940 rewind_error = spa_load_retry(spa, state, mosconfig);
2943 spa->spa_extreme_rewind = B_FALSE;
2944 spa->spa_load_max_txg = UINT64_MAX;
2946 if (config && (rewind_error || state != SPA_LOAD_RECOVER))
2947 spa_config_set(spa, config);
2949 if (state == SPA_LOAD_RECOVER) {
2950 ASSERT3P(loadinfo, ==, NULL);
2951 return (rewind_error);
2953 /* Store the rewind info as part of the initial load info */
2954 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO,
2955 spa->spa_load_info);
2957 /* Restore the initial load info */
2958 fnvlist_free(spa->spa_load_info);
2959 spa->spa_load_info = loadinfo;
2961 return (load_error);
2968 * The import case is identical to an open except that the configuration is sent
2969 * down from userland, instead of grabbed from the configuration cache. For the
2970 * case of an open, the pool configuration will exist in the
2971 * POOL_STATE_UNINITIALIZED state.
2973 * The stats information (gen/count/ustats) is used to gather vdev statistics at
2974 * the same time open the pool, without having to keep around the spa_t in some
2978 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy,
2982 spa_load_state_t state = SPA_LOAD_OPEN;
2984 int locked = B_FALSE;
2985 int firstopen = B_FALSE;
2990 * As disgusting as this is, we need to support recursive calls to this
2991 * function because dsl_dir_open() is called during spa_load(), and ends
2992 * up calling spa_open() again. The real fix is to figure out how to
2993 * avoid dsl_dir_open() calling this in the first place.
2995 if (mutex_owner(&spa_namespace_lock) != curthread) {
2996 mutex_enter(&spa_namespace_lock);
3000 if ((spa = spa_lookup(pool)) == NULL) {
3002 mutex_exit(&spa_namespace_lock);
3003 return (SET_ERROR(ENOENT));
3006 if (spa->spa_state == POOL_STATE_UNINITIALIZED) {
3007 zpool_rewind_policy_t policy;
3011 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config,
3013 if (policy.zrp_request & ZPOOL_DO_REWIND)
3014 state = SPA_LOAD_RECOVER;
3016 spa_activate(spa, spa_mode_global);
3018 if (state != SPA_LOAD_RECOVER)
3019 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0;
3021 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg,
3022 policy.zrp_request);
3024 if (error == EBADF) {
3026 * If vdev_validate() returns failure (indicated by
3027 * EBADF), it indicates that one of the vdevs indicates
3028 * that the pool has been exported or destroyed. If
3029 * this is the case, the config cache is out of sync and
3030 * we should remove the pool from the namespace.
3033 spa_deactivate(spa);
3034 spa_config_sync(spa, B_TRUE, B_TRUE);
3037 mutex_exit(&spa_namespace_lock);
3038 return (SET_ERROR(ENOENT));
3043 * We can't open the pool, but we still have useful
3044 * information: the state of each vdev after the
3045 * attempted vdev_open(). Return this to the user.
3047 if (config != NULL && spa->spa_config) {
3048 VERIFY(nvlist_dup(spa->spa_config, config,
3050 VERIFY(nvlist_add_nvlist(*config,
3051 ZPOOL_CONFIG_LOAD_INFO,
3052 spa->spa_load_info) == 0);
3055 spa_deactivate(spa);
3056 spa->spa_last_open_failed = error;
3058 mutex_exit(&spa_namespace_lock);
3064 spa_open_ref(spa, tag);
3067 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
3070 * If we've recovered the pool, pass back any information we
3071 * gathered while doing the load.
3073 if (state == SPA_LOAD_RECOVER) {
3074 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO,
3075 spa->spa_load_info) == 0);
3079 spa->spa_last_open_failed = 0;
3080 spa->spa_last_ubsync_txg = 0;
3081 spa->spa_load_txg = 0;
3082 mutex_exit(&spa_namespace_lock);
3086 zvol_create_minors(spa->spa_name);
3097 spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy,
3100 return (spa_open_common(name, spapp, tag, policy, config));
3104 spa_open(const char *name, spa_t **spapp, void *tag)
3106 return (spa_open_common(name, spapp, tag, NULL, NULL));
3110 * Lookup the given spa_t, incrementing the inject count in the process,
3111 * preventing it from being exported or destroyed.
3114 spa_inject_addref(char *name)
3118 mutex_enter(&spa_namespace_lock);
3119 if ((spa = spa_lookup(name)) == NULL) {
3120 mutex_exit(&spa_namespace_lock);
3123 spa->spa_inject_ref++;
3124 mutex_exit(&spa_namespace_lock);
3130 spa_inject_delref(spa_t *spa)
3132 mutex_enter(&spa_namespace_lock);
3133 spa->spa_inject_ref--;
3134 mutex_exit(&spa_namespace_lock);
3138 * Add spares device information to the nvlist.
3141 spa_add_spares(spa_t *spa, nvlist_t *config)
3151 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
3153 if (spa->spa_spares.sav_count == 0)
3156 VERIFY(nvlist_lookup_nvlist(config,
3157 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
3158 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
3159 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
3161 VERIFY(nvlist_add_nvlist_array(nvroot,
3162 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
3163 VERIFY(nvlist_lookup_nvlist_array(nvroot,
3164 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
3167 * Go through and find any spares which have since been
3168 * repurposed as an active spare. If this is the case, update
3169 * their status appropriately.
3171 for (i = 0; i < nspares; i++) {
3172 VERIFY(nvlist_lookup_uint64(spares[i],
3173 ZPOOL_CONFIG_GUID, &guid) == 0);
3174 if (spa_spare_exists(guid, &pool, NULL) &&
3176 VERIFY(nvlist_lookup_uint64_array(
3177 spares[i], ZPOOL_CONFIG_VDEV_STATS,
3178 (uint64_t **)&vs, &vsc) == 0);
3179 vs->vs_state = VDEV_STATE_CANT_OPEN;
3180 vs->vs_aux = VDEV_AUX_SPARED;
3187 * Add l2cache device information to the nvlist, including vdev stats.
3190 spa_add_l2cache(spa_t *spa, nvlist_t *config)
3193 uint_t i, j, nl2cache;
3200 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
3202 if (spa->spa_l2cache.sav_count == 0)
3205 VERIFY(nvlist_lookup_nvlist(config,
3206 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
3207 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
3208 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
3209 if (nl2cache != 0) {
3210 VERIFY(nvlist_add_nvlist_array(nvroot,
3211 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
3212 VERIFY(nvlist_lookup_nvlist_array(nvroot,
3213 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
3216 * Update level 2 cache device stats.
3219 for (i = 0; i < nl2cache; i++) {
3220 VERIFY(nvlist_lookup_uint64(l2cache[i],
3221 ZPOOL_CONFIG_GUID, &guid) == 0);
3224 for (j = 0; j < spa->spa_l2cache.sav_count; j++) {
3226 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) {
3227 vd = spa->spa_l2cache.sav_vdevs[j];
3233 VERIFY(nvlist_lookup_uint64_array(l2cache[i],
3234 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc)
3236 vdev_get_stats(vd, vs);
3242 spa_add_feature_stats(spa_t *spa, nvlist_t *config)
3248 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
3249 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3251 /* We may be unable to read features if pool is suspended. */
3252 if (spa_suspended(spa))
3255 if (spa->spa_feat_for_read_obj != 0) {
3256 for (zap_cursor_init(&zc, spa->spa_meta_objset,
3257 spa->spa_feat_for_read_obj);
3258 zap_cursor_retrieve(&zc, &za) == 0;
3259 zap_cursor_advance(&zc)) {
3260 ASSERT(za.za_integer_length == sizeof (uint64_t) &&
3261 za.za_num_integers == 1);
3262 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name,
3263 za.za_first_integer));
3265 zap_cursor_fini(&zc);
3268 if (spa->spa_feat_for_write_obj != 0) {
3269 for (zap_cursor_init(&zc, spa->spa_meta_objset,
3270 spa->spa_feat_for_write_obj);
3271 zap_cursor_retrieve(&zc, &za) == 0;
3272 zap_cursor_advance(&zc)) {
3273 ASSERT(za.za_integer_length == sizeof (uint64_t) &&
3274 za.za_num_integers == 1);
3275 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name,
3276 za.za_first_integer));
3278 zap_cursor_fini(&zc);
3282 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS,
3284 nvlist_free(features);
3288 spa_get_stats(const char *name, nvlist_t **config,
3289 char *altroot, size_t buflen)
3295 error = spa_open_common(name, &spa, FTAG, NULL, config);
3299 * This still leaves a window of inconsistency where the spares
3300 * or l2cache devices could change and the config would be
3301 * self-inconsistent.
3303 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3305 if (*config != NULL) {
3306 uint64_t loadtimes[2];
3308 loadtimes[0] = spa->spa_loaded_ts.tv_sec;
3309 loadtimes[1] = spa->spa_loaded_ts.tv_nsec;
3310 VERIFY(nvlist_add_uint64_array(*config,
3311 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0);
3313 VERIFY(nvlist_add_uint64(*config,
3314 ZPOOL_CONFIG_ERRCOUNT,
3315 spa_get_errlog_size(spa)) == 0);
3317 if (spa_suspended(spa))
3318 VERIFY(nvlist_add_uint64(*config,
3319 ZPOOL_CONFIG_SUSPENDED,
3320 spa->spa_failmode) == 0);
3322 spa_add_spares(spa, *config);
3323 spa_add_l2cache(spa, *config);
3324 spa_add_feature_stats(spa, *config);
3329 * We want to get the alternate root even for faulted pools, so we cheat
3330 * and call spa_lookup() directly.
3334 mutex_enter(&spa_namespace_lock);
3335 spa = spa_lookup(name);
3337 spa_altroot(spa, altroot, buflen);
3341 mutex_exit(&spa_namespace_lock);
3343 spa_altroot(spa, altroot, buflen);
3348 spa_config_exit(spa, SCL_CONFIG, FTAG);
3349 spa_close(spa, FTAG);
3356 * Validate that the auxiliary device array is well formed. We must have an
3357 * array of nvlists, each which describes a valid leaf vdev. If this is an
3358 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
3359 * specified, as long as they are well-formed.
3362 spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode,
3363 spa_aux_vdev_t *sav, const char *config, uint64_t version,
3364 vdev_labeltype_t label)
3371 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
3374 * It's acceptable to have no devs specified.
3376 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0)
3380 return (SET_ERROR(EINVAL));
3383 * Make sure the pool is formatted with a version that supports this
3386 if (spa_version(spa) < version)
3387 return (SET_ERROR(ENOTSUP));
3390 * Set the pending device list so we correctly handle device in-use
3393 sav->sav_pending = dev;
3394 sav->sav_npending = ndev;
3396 for (i = 0; i < ndev; i++) {
3397 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0,
3401 if (!vd->vdev_ops->vdev_op_leaf) {
3403 error = SET_ERROR(EINVAL);
3408 * The L2ARC currently only supports disk devices in
3409 * kernel context. For user-level testing, we allow it.
3412 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) &&
3413 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) {
3414 error = SET_ERROR(ENOTBLK);
3421 if ((error = vdev_open(vd)) == 0 &&
3422 (error = vdev_label_init(vd, crtxg, label)) == 0) {
3423 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID,
3424 vd->vdev_guid) == 0);
3430 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE))
3437 sav->sav_pending = NULL;
3438 sav->sav_npending = 0;
3443 spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode)
3447 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
3449 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode,
3450 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES,
3451 VDEV_LABEL_SPARE)) != 0) {
3455 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode,
3456 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE,
3457 VDEV_LABEL_L2CACHE));
3461 spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs,
3466 if (sav->sav_config != NULL) {
3472 * Generate new dev list by concatentating with the
3475 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config,
3476 &olddevs, &oldndevs) == 0);
3478 newdevs = kmem_alloc(sizeof (void *) *
3479 (ndevs + oldndevs), KM_SLEEP);
3480 for (i = 0; i < oldndevs; i++)
3481 VERIFY(nvlist_dup(olddevs[i], &newdevs[i],
3483 for (i = 0; i < ndevs; i++)
3484 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs],
3487 VERIFY(nvlist_remove(sav->sav_config, config,
3488 DATA_TYPE_NVLIST_ARRAY) == 0);
3490 VERIFY(nvlist_add_nvlist_array(sav->sav_config,
3491 config, newdevs, ndevs + oldndevs) == 0);
3492 for (i = 0; i < oldndevs + ndevs; i++)
3493 nvlist_free(newdevs[i]);
3494 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *));
3497 * Generate a new dev list.
3499 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME,
3501 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config,
3507 * Stop and drop level 2 ARC devices
3510 spa_l2cache_drop(spa_t *spa)
3514 spa_aux_vdev_t *sav = &spa->spa_l2cache;
3516 for (i = 0; i < sav->sav_count; i++) {
3519 vd = sav->sav_vdevs[i];
3522 if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
3523 pool != 0ULL && l2arc_vdev_present(vd))
3524 l2arc_remove_vdev(vd);
3532 spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props,
3536 char *altroot = NULL;
3541 uint64_t txg = TXG_INITIAL;
3542 nvlist_t **spares, **l2cache;
3543 uint_t nspares, nl2cache;
3544 uint64_t version, obj;
3545 boolean_t has_features;
3548 * If this pool already exists, return failure.
3550 mutex_enter(&spa_namespace_lock);
3551 if (spa_lookup(pool) != NULL) {
3552 mutex_exit(&spa_namespace_lock);
3553 return (SET_ERROR(EEXIST));
3557 * Allocate a new spa_t structure.
3559 (void) nvlist_lookup_string(props,
3560 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
3561 spa = spa_add(pool, NULL, altroot);
3562 spa_activate(spa, spa_mode_global);
3564 if (props && (error = spa_prop_validate(spa, props))) {
3565 spa_deactivate(spa);
3567 mutex_exit(&spa_namespace_lock);
3571 has_features = B_FALSE;
3572 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL);
3573 elem != NULL; elem = nvlist_next_nvpair(props, elem)) {
3574 if (zpool_prop_feature(nvpair_name(elem)))
3575 has_features = B_TRUE;
3578 if (has_features || nvlist_lookup_uint64(props,
3579 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) {
3580 version = SPA_VERSION;
3582 ASSERT(SPA_VERSION_IS_SUPPORTED(version));
3584 spa->spa_first_txg = txg;
3585 spa->spa_uberblock.ub_txg = txg - 1;
3586 spa->spa_uberblock.ub_version = version;
3587 spa->spa_ubsync = spa->spa_uberblock;
3590 * Create "The Godfather" zio to hold all async IOs
3592 spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *),
3594 for (int i = 0; i < max_ncpus; i++) {
3595 spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
3596 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
3597 ZIO_FLAG_GODFATHER);
3601 * Create the root vdev.
3603 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3605 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD);
3607 ASSERT(error != 0 || rvd != NULL);
3608 ASSERT(error != 0 || spa->spa_root_vdev == rvd);
3610 if (error == 0 && !zfs_allocatable_devs(nvroot))
3611 error = SET_ERROR(EINVAL);
3614 (error = vdev_create(rvd, txg, B_FALSE)) == 0 &&
3615 (error = spa_validate_aux(spa, nvroot, txg,
3616 VDEV_ALLOC_ADD)) == 0) {
3617 for (int c = 0; c < rvd->vdev_children; c++) {
3618 vdev_ashift_optimize(rvd->vdev_child[c]);
3619 vdev_metaslab_set_size(rvd->vdev_child[c]);
3620 vdev_expand(rvd->vdev_child[c], txg);
3624 spa_config_exit(spa, SCL_ALL, FTAG);
3628 spa_deactivate(spa);
3630 mutex_exit(&spa_namespace_lock);
3635 * Get the list of spares, if specified.
3637 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
3638 &spares, &nspares) == 0) {
3639 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME,
3641 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
3642 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
3643 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3644 spa_load_spares(spa);
3645 spa_config_exit(spa, SCL_ALL, FTAG);
3646 spa->spa_spares.sav_sync = B_TRUE;
3650 * Get the list of level 2 cache devices, if specified.
3652 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
3653 &l2cache, &nl2cache) == 0) {
3654 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
3655 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3656 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
3657 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
3658 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3659 spa_load_l2cache(spa);
3660 spa_config_exit(spa, SCL_ALL, FTAG);
3661 spa->spa_l2cache.sav_sync = B_TRUE;
3664 spa->spa_is_initializing = B_TRUE;
3665 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg);
3666 spa->spa_meta_objset = dp->dp_meta_objset;
3667 spa->spa_is_initializing = B_FALSE;
3670 * Create DDTs (dedup tables).
3674 spa_update_dspace(spa);
3676 tx = dmu_tx_create_assigned(dp, txg);
3679 * Create the pool config object.
3681 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset,
3682 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE,
3683 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx);
3685 if (zap_add(spa->spa_meta_objset,
3686 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG,
3687 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) {
3688 cmn_err(CE_PANIC, "failed to add pool config");
3691 if (spa_version(spa) >= SPA_VERSION_FEATURES)
3692 spa_feature_create_zap_objects(spa, tx);
3694 if (zap_add(spa->spa_meta_objset,
3695 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION,
3696 sizeof (uint64_t), 1, &version, tx) != 0) {
3697 cmn_err(CE_PANIC, "failed to add pool version");
3700 /* Newly created pools with the right version are always deflated. */
3701 if (version >= SPA_VERSION_RAIDZ_DEFLATE) {
3702 spa->spa_deflate = TRUE;
3703 if (zap_add(spa->spa_meta_objset,
3704 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
3705 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) {
3706 cmn_err(CE_PANIC, "failed to add deflate");
3711 * Create the deferred-free bpobj. Turn off compression
3712 * because sync-to-convergence takes longer if the blocksize
3715 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx);
3716 dmu_object_set_compress(spa->spa_meta_objset, obj,
3717 ZIO_COMPRESS_OFF, tx);
3718 if (zap_add(spa->spa_meta_objset,
3719 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ,
3720 sizeof (uint64_t), 1, &obj, tx) != 0) {
3721 cmn_err(CE_PANIC, "failed to add bpobj");
3723 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj,
3724 spa->spa_meta_objset, obj));
3727 * Create the pool's history object.
3729 if (version >= SPA_VERSION_ZPOOL_HISTORY)
3730 spa_history_create_obj(spa, tx);
3733 * Set pool properties.
3735 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS);
3736 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
3737 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE);
3738 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND);
3740 if (props != NULL) {
3741 spa_configfile_set(spa, props, B_FALSE);
3742 spa_sync_props(props, tx);
3747 spa->spa_sync_on = B_TRUE;
3748 txg_sync_start(spa->spa_dsl_pool);
3751 * We explicitly wait for the first transaction to complete so that our
3752 * bean counters are appropriately updated.
3754 txg_wait_synced(spa->spa_dsl_pool, txg);
3756 spa_config_sync(spa, B_FALSE, B_TRUE);
3758 spa_history_log_version(spa, "create");
3760 spa->spa_minref = refcount_count(&spa->spa_refcount);
3762 mutex_exit(&spa_namespace_lock);
3770 * Get the root pool information from the root disk, then import the root pool
3771 * during the system boot up time.
3773 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
3776 spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid)
3779 nvlist_t *nvtop, *nvroot;
3782 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0)
3786 * Add this top-level vdev to the child array.
3788 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
3790 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
3792 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0);
3795 * Put this pool's top-level vdevs into a root vdev.
3797 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3798 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
3799 VDEV_TYPE_ROOT) == 0);
3800 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0);
3801 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0);
3802 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
3806 * Replace the existing vdev_tree with the new root vdev in
3807 * this pool's configuration (remove the old, add the new).
3809 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
3810 nvlist_free(nvroot);
3815 * Walk the vdev tree and see if we can find a device with "better"
3816 * configuration. A configuration is "better" if the label on that
3817 * device has a more recent txg.
3820 spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg)
3822 for (int c = 0; c < vd->vdev_children; c++)
3823 spa_alt_rootvdev(vd->vdev_child[c], avd, txg);
3825 if (vd->vdev_ops->vdev_op_leaf) {
3829 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid,
3833 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG,
3837 * Do we have a better boot device?
3839 if (label_txg > *txg) {
3848 * Import a root pool.
3850 * For x86. devpath_list will consist of devid and/or physpath name of
3851 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3852 * The GRUB "findroot" command will return the vdev we should boot.
3854 * For Sparc, devpath_list consists the physpath name of the booting device
3855 * no matter the rootpool is a single device pool or a mirrored pool.
3857 * "/pci@1f,0/ide@d/disk@0,0:a"
3860 spa_import_rootpool(char *devpath, char *devid)
3863 vdev_t *rvd, *bvd, *avd = NULL;
3864 nvlist_t *config, *nvtop;
3870 * Read the label from the boot device and generate a configuration.
3872 config = spa_generate_rootconf(devpath, devid, &guid);
3873 #if defined(_OBP) && defined(_KERNEL)
3874 if (config == NULL) {
3875 if (strstr(devpath, "/iscsi/ssd") != NULL) {
3877 get_iscsi_bootpath_phy(devpath);
3878 config = spa_generate_rootconf(devpath, devid, &guid);
3882 if (config == NULL) {
3883 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'",
3885 return (SET_ERROR(EIO));
3888 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
3890 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0);
3892 mutex_enter(&spa_namespace_lock);
3893 if ((spa = spa_lookup(pname)) != NULL) {
3895 * Remove the existing root pool from the namespace so that we
3896 * can replace it with the correct config we just read in.
3901 spa = spa_add(pname, config, NULL);
3902 spa->spa_is_root = B_TRUE;
3903 spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
3906 * Build up a vdev tree based on the boot device's label config.
3908 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
3910 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3911 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
3912 VDEV_ALLOC_ROOTPOOL);
3913 spa_config_exit(spa, SCL_ALL, FTAG);
3915 mutex_exit(&spa_namespace_lock);
3916 nvlist_free(config);
3917 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
3923 * Get the boot vdev.
3925 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) {
3926 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu",
3927 (u_longlong_t)guid);
3928 error = SET_ERROR(ENOENT);
3933 * Determine if there is a better boot device.
3936 spa_alt_rootvdev(rvd, &avd, &txg);
3938 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please "
3939 "try booting from '%s'", avd->vdev_path);
3940 error = SET_ERROR(EINVAL);
3945 * If the boot device is part of a spare vdev then ensure that
3946 * we're booting off the active spare.
3948 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops &&
3949 !bvd->vdev_isspare) {
3950 cmn_err(CE_NOTE, "The boot device is currently spared. Please "
3951 "try booting from '%s'",
3953 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path);
3954 error = SET_ERROR(EINVAL);
3960 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3962 spa_config_exit(spa, SCL_ALL, FTAG);
3963 mutex_exit(&spa_namespace_lock);
3965 nvlist_free(config);
3971 extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs,
3975 spa_generate_rootconf(const char *name)
3977 nvlist_t **configs, **tops;
3979 nvlist_t *best_cfg, *nvtop, *nvroot;
3988 if (vdev_geom_read_pool_label(name, &configs, &count) != 0)
3991 ASSERT3U(count, !=, 0);
3993 for (i = 0; i < count; i++) {
3996 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG,
3998 if (txg > best_txg) {
4000 best_cfg = configs[i];
4005 * Multi-vdev root pool configuration discovery is not supported yet.
4008 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren);
4010 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY,
4013 tops = kmem_zalloc(nchildren * sizeof(void *), KM_SLEEP);
4014 for (i = 0; i < nchildren; i++) {
4017 if (configs[i] == NULL)
4019 VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE,
4021 nvlist_dup(nvtop, &tops[i], KM_SLEEP);
4023 for (i = 0; holes != NULL && i < nholes; i++) {
4026 if (tops[holes[i]] != NULL)
4028 nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP);
4029 VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE,
4030 VDEV_TYPE_HOLE) == 0);
4031 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID,
4033 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID,
4036 for (i = 0; i < nchildren; i++) {
4037 if (tops[i] != NULL)
4039 nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP);
4040 VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE,
4041 VDEV_TYPE_MISSING) == 0);
4042 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID,
4044 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID,
4049 * Create pool config based on the best vdev config.
4051 nvlist_dup(best_cfg, &config, KM_SLEEP);
4054 * Put this pool's top-level vdevs into a root vdev.
4056 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
4058 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
4059 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
4060 VDEV_TYPE_ROOT) == 0);
4061 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0);
4062 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0);
4063 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
4064 tops, nchildren) == 0);
4067 * Replace the existing vdev_tree with the new root vdev in
4068 * this pool's configuration (remove the old, add the new).
4070 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
4073 * Drop vdev config elements that should not be present at pool level.
4075 nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64);
4076 nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64);
4078 for (i = 0; i < count; i++)
4079 nvlist_free(configs[i]);
4080 kmem_free(configs, count * sizeof(void *));
4081 for (i = 0; i < nchildren; i++)
4082 nvlist_free(tops[i]);
4083 kmem_free(tops, nchildren * sizeof(void *));
4084 nvlist_free(nvroot);
4089 spa_import_rootpool(const char *name)
4092 vdev_t *rvd, *bvd, *avd = NULL;
4093 nvlist_t *config, *nvtop;
4099 * Read the label from the boot device and generate a configuration.
4101 config = spa_generate_rootconf(name);
4103 mutex_enter(&spa_namespace_lock);
4104 if (config != NULL) {
4105 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
4106 &pname) == 0 && strcmp(name, pname) == 0);
4107 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg)
4110 if ((spa = spa_lookup(pname)) != NULL) {
4112 * Remove the existing root pool from the namespace so
4113 * that we can replace it with the correct config
4118 spa = spa_add(pname, config, NULL);
4121 * Set spa_ubsync.ub_version as it can be used in vdev_alloc()
4122 * via spa_version().
4124 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
4125 &spa->spa_ubsync.ub_version) != 0)
4126 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
4127 } else if ((spa = spa_lookup(name)) == NULL) {
4128 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'",
4132 VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0);
4134 spa->spa_is_root = B_TRUE;
4135 spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
4138 * Build up a vdev tree based on the boot device's label config.
4140 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
4142 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4143 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
4144 VDEV_ALLOC_ROOTPOOL);
4145 spa_config_exit(spa, SCL_ALL, FTAG);
4147 mutex_exit(&spa_namespace_lock);
4148 nvlist_free(config);
4149 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
4154 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4156 spa_config_exit(spa, SCL_ALL, FTAG);
4157 mutex_exit(&spa_namespace_lock);
4159 nvlist_free(config);
4167 * Import a non-root pool into the system.
4170 spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags)
4173 char *altroot = NULL;
4174 spa_load_state_t state = SPA_LOAD_IMPORT;
4175 zpool_rewind_policy_t policy;
4176 uint64_t mode = spa_mode_global;
4177 uint64_t readonly = B_FALSE;
4180 nvlist_t **spares, **l2cache;
4181 uint_t nspares, nl2cache;
4184 * If a pool with this name exists, return failure.
4186 mutex_enter(&spa_namespace_lock);
4187 if (spa_lookup(pool) != NULL) {
4188 mutex_exit(&spa_namespace_lock);
4189 return (SET_ERROR(EEXIST));
4193 * Create and initialize the spa structure.
4195 (void) nvlist_lookup_string(props,
4196 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
4197 (void) nvlist_lookup_uint64(props,
4198 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly);
4201 spa = spa_add(pool, config, altroot);
4202 spa->spa_import_flags = flags;
4205 * Verbatim import - Take a pool and insert it into the namespace
4206 * as if it had been loaded at boot.
4208 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) {
4210 spa_configfile_set(spa, props, B_FALSE);
4212 spa_config_sync(spa, B_FALSE, B_TRUE);
4214 mutex_exit(&spa_namespace_lock);
4218 spa_activate(spa, mode);
4221 * Don't start async tasks until we know everything is healthy.
4223 spa_async_suspend(spa);
4225 zpool_get_rewind_policy(config, &policy);
4226 if (policy.zrp_request & ZPOOL_DO_REWIND)
4227 state = SPA_LOAD_RECOVER;
4230 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
4231 * because the user-supplied config is actually the one to trust when
4234 if (state != SPA_LOAD_RECOVER)
4235 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0;
4237 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg,
4238 policy.zrp_request);
4241 * Propagate anything learned while loading the pool and pass it
4242 * back to caller (i.e. rewind info, missing devices, etc).
4244 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO,
4245 spa->spa_load_info) == 0);
4247 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4249 * Toss any existing sparelist, as it doesn't have any validity
4250 * anymore, and conflicts with spa_has_spare().
4252 if (spa->spa_spares.sav_config) {
4253 nvlist_free(spa->spa_spares.sav_config);
4254 spa->spa_spares.sav_config = NULL;
4255 spa_load_spares(spa);
4257 if (spa->spa_l2cache.sav_config) {
4258 nvlist_free(spa->spa_l2cache.sav_config);
4259 spa->spa_l2cache.sav_config = NULL;
4260 spa_load_l2cache(spa);
4263 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
4266 error = spa_validate_aux(spa, nvroot, -1ULL,
4269 error = spa_validate_aux(spa, nvroot, -1ULL,
4270 VDEV_ALLOC_L2CACHE);
4271 spa_config_exit(spa, SCL_ALL, FTAG);
4274 spa_configfile_set(spa, props, B_FALSE);
4276 if (error != 0 || (props && spa_writeable(spa) &&
4277 (error = spa_prop_set(spa, props)))) {
4279 spa_deactivate(spa);
4281 mutex_exit(&spa_namespace_lock);
4285 spa_async_resume(spa);
4288 * Override any spares and level 2 cache devices as specified by
4289 * the user, as these may have correct device names/devids, etc.
4291 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
4292 &spares, &nspares) == 0) {
4293 if (spa->spa_spares.sav_config)
4294 VERIFY(nvlist_remove(spa->spa_spares.sav_config,
4295 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0);
4297 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config,
4298 NV_UNIQUE_NAME, KM_SLEEP) == 0);
4299 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
4300 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
4301 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4302 spa_load_spares(spa);
4303 spa_config_exit(spa, SCL_ALL, FTAG);
4304 spa->spa_spares.sav_sync = B_TRUE;
4306 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
4307 &l2cache, &nl2cache) == 0) {
4308 if (spa->spa_l2cache.sav_config)
4309 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config,
4310 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0);
4312 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
4313 NV_UNIQUE_NAME, KM_SLEEP) == 0);
4314 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
4315 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
4316 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4317 spa_load_l2cache(spa);
4318 spa_config_exit(spa, SCL_ALL, FTAG);
4319 spa->spa_l2cache.sav_sync = B_TRUE;
4323 * Check for any removed devices.
4325 if (spa->spa_autoreplace) {
4326 spa_aux_check_removed(&spa->spa_spares);
4327 spa_aux_check_removed(&spa->spa_l2cache);
4330 if (spa_writeable(spa)) {
4332 * Update the config cache to include the newly-imported pool.
4334 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
4338 * It's possible that the pool was expanded while it was exported.
4339 * We kick off an async task to handle this for us.
4341 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND);
4343 mutex_exit(&spa_namespace_lock);
4344 spa_history_log_version(spa, "import");
4348 zvol_create_minors(pool);
4355 spa_tryimport(nvlist_t *tryconfig)
4357 nvlist_t *config = NULL;
4363 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname))
4366 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state))
4370 * Create and initialize the spa structure.
4372 mutex_enter(&spa_namespace_lock);
4373 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL);
4374 spa_activate(spa, FREAD);
4377 * Pass off the heavy lifting to spa_load().
4378 * Pass TRUE for mosconfig because the user-supplied config
4379 * is actually the one to trust when doing an import.
4381 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE);
4384 * If 'tryconfig' was at least parsable, return the current config.
4386 if (spa->spa_root_vdev != NULL) {
4387 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
4388 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME,
4390 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
4392 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP,
4393 spa->spa_uberblock.ub_timestamp) == 0);
4394 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO,
4395 spa->spa_load_info) == 0);
4398 * If the bootfs property exists on this pool then we
4399 * copy it out so that external consumers can tell which
4400 * pools are bootable.
4402 if ((!error || error == EEXIST) && spa->spa_bootfs) {
4403 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
4406 * We have to play games with the name since the
4407 * pool was opened as TRYIMPORT_NAME.
4409 if (dsl_dsobj_to_dsname(spa_name(spa),
4410 spa->spa_bootfs, tmpname) == 0) {
4412 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
4414 cp = strchr(tmpname, '/');
4416 (void) strlcpy(dsname, tmpname,
4419 (void) snprintf(dsname, MAXPATHLEN,
4420 "%s/%s", poolname, ++cp);
4422 VERIFY(nvlist_add_string(config,
4423 ZPOOL_CONFIG_BOOTFS, dsname) == 0);
4424 kmem_free(dsname, MAXPATHLEN);
4426 kmem_free(tmpname, MAXPATHLEN);
4430 * Add the list of hot spares and level 2 cache devices.
4432 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
4433 spa_add_spares(spa, config);
4434 spa_add_l2cache(spa, config);
4435 spa_config_exit(spa, SCL_CONFIG, FTAG);
4439 spa_deactivate(spa);
4441 mutex_exit(&spa_namespace_lock);
4447 * Pool export/destroy
4449 * The act of destroying or exporting a pool is very simple. We make sure there
4450 * is no more pending I/O and any references to the pool are gone. Then, we
4451 * update the pool state and sync all the labels to disk, removing the
4452 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
4453 * we don't sync the labels or remove the configuration cache.
4456 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig,
4457 boolean_t force, boolean_t hardforce)
4464 if (!(spa_mode_global & FWRITE))
4465 return (SET_ERROR(EROFS));
4467 mutex_enter(&spa_namespace_lock);
4468 if ((spa = spa_lookup(pool)) == NULL) {
4469 mutex_exit(&spa_namespace_lock);
4470 return (SET_ERROR(ENOENT));
4474 * Put a hold on the pool, drop the namespace lock, stop async tasks,
4475 * reacquire the namespace lock, and see if we can export.
4477 spa_open_ref(spa, FTAG);
4478 mutex_exit(&spa_namespace_lock);
4479 spa_async_suspend(spa);
4480 mutex_enter(&spa_namespace_lock);
4481 spa_close(spa, FTAG);
4484 * The pool will be in core if it's openable,
4485 * in which case we can modify its state.
4487 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) {
4489 * Objsets may be open only because they're dirty, so we
4490 * have to force it to sync before checking spa_refcnt.
4492 txg_wait_synced(spa->spa_dsl_pool, 0);
4495 * A pool cannot be exported or destroyed if there are active
4496 * references. If we are resetting a pool, allow references by
4497 * fault injection handlers.
4499 if (!spa_refcount_zero(spa) ||
4500 (spa->spa_inject_ref != 0 &&
4501 new_state != POOL_STATE_UNINITIALIZED)) {
4502 spa_async_resume(spa);
4503 mutex_exit(&spa_namespace_lock);
4504 return (SET_ERROR(EBUSY));
4508 * A pool cannot be exported if it has an active shared spare.
4509 * This is to prevent other pools stealing the active spare
4510 * from an exported pool. At user's own will, such pool can
4511 * be forcedly exported.
4513 if (!force && new_state == POOL_STATE_EXPORTED &&
4514 spa_has_active_shared_spare(spa)) {
4515 spa_async_resume(spa);
4516 mutex_exit(&spa_namespace_lock);
4517 return (SET_ERROR(EXDEV));
4521 * We want this to be reflected on every label,
4522 * so mark them all dirty. spa_unload() will do the
4523 * final sync that pushes these changes out.
4525 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) {
4526 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4527 spa->spa_state = new_state;
4528 spa->spa_final_txg = spa_last_synced_txg(spa) +
4530 vdev_config_dirty(spa->spa_root_vdev);
4531 spa_config_exit(spa, SCL_ALL, FTAG);
4535 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY);
4537 if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
4539 spa_deactivate(spa);
4542 if (oldconfig && spa->spa_config)
4543 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0);
4545 if (new_state != POOL_STATE_UNINITIALIZED) {
4547 spa_config_sync(spa, B_TRUE, B_TRUE);
4550 mutex_exit(&spa_namespace_lock);
4556 * Destroy a storage pool.
4559 spa_destroy(char *pool)
4561 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL,
4566 * Export a storage pool.
4569 spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
4570 boolean_t hardforce)
4572 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig,
4577 * Similar to spa_export(), this unloads the spa_t without actually removing it
4578 * from the namespace in any way.
4581 spa_reset(char *pool)
4583 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL,
4588 * ==========================================================================
4589 * Device manipulation
4590 * ==========================================================================
4594 * Add a device to a storage pool.
4597 spa_vdev_add(spa_t *spa, nvlist_t *nvroot)
4601 vdev_t *rvd = spa->spa_root_vdev;
4603 nvlist_t **spares, **l2cache;
4604 uint_t nspares, nl2cache;
4606 ASSERT(spa_writeable(spa));
4608 txg = spa_vdev_enter(spa);
4610 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0,
4611 VDEV_ALLOC_ADD)) != 0)
4612 return (spa_vdev_exit(spa, NULL, txg, error));
4614 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */
4616 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares,
4620 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache,
4624 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0)
4625 return (spa_vdev_exit(spa, vd, txg, EINVAL));
4627 if (vd->vdev_children != 0 &&
4628 (error = vdev_create(vd, txg, B_FALSE)) != 0)
4629 return (spa_vdev_exit(spa, vd, txg, error));
4632 * We must validate the spares and l2cache devices after checking the
4633 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
4635 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0)
4636 return (spa_vdev_exit(spa, vd, txg, error));
4639 * Transfer each new top-level vdev from vd to rvd.
4641 for (int c = 0; c < vd->vdev_children; c++) {
4644 * Set the vdev id to the first hole, if one exists.
4646 for (id = 0; id < rvd->vdev_children; id++) {
4647 if (rvd->vdev_child[id]->vdev_ishole) {
4648 vdev_free(rvd->vdev_child[id]);
4652 tvd = vd->vdev_child[c];
4653 vdev_remove_child(vd, tvd);
4655 vdev_add_child(rvd, tvd);
4656 vdev_config_dirty(tvd);
4660 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares,
4661 ZPOOL_CONFIG_SPARES);
4662 spa_load_spares(spa);
4663 spa->spa_spares.sav_sync = B_TRUE;
4666 if (nl2cache != 0) {
4667 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache,
4668 ZPOOL_CONFIG_L2CACHE);
4669 spa_load_l2cache(spa);
4670 spa->spa_l2cache.sav_sync = B_TRUE;
4674 * We have to be careful when adding new vdevs to an existing pool.
4675 * If other threads start allocating from these vdevs before we
4676 * sync the config cache, and we lose power, then upon reboot we may
4677 * fail to open the pool because there are DVAs that the config cache
4678 * can't translate. Therefore, we first add the vdevs without
4679 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
4680 * and then let spa_config_update() initialize the new metaslabs.
4682 * spa_load() checks for added-but-not-initialized vdevs, so that
4683 * if we lose power at any point in this sequence, the remaining
4684 * steps will be completed the next time we load the pool.
4686 (void) spa_vdev_exit(spa, vd, txg, 0);
4688 mutex_enter(&spa_namespace_lock);
4689 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
4690 mutex_exit(&spa_namespace_lock);
4696 * Attach a device to a mirror. The arguments are the path to any device
4697 * in the mirror, and the nvroot for the new device. If the path specifies
4698 * a device that is not mirrored, we automatically insert the mirror vdev.
4700 * If 'replacing' is specified, the new device is intended to replace the
4701 * existing device; in this case the two devices are made into their own
4702 * mirror using the 'replacing' vdev, which is functionally identical to
4703 * the mirror vdev (it actually reuses all the same ops) but has a few
4704 * extra rules: you can't attach to it after it's been created, and upon
4705 * completion of resilvering, the first disk (the one being replaced)
4706 * is automatically detached.
4709 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing)
4711 uint64_t txg, dtl_max_txg;
4712 vdev_t *rvd = spa->spa_root_vdev;
4713 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd;
4715 char *oldvdpath, *newvdpath;
4719 ASSERT(spa_writeable(spa));
4721 txg = spa_vdev_enter(spa);
4723 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE);
4726 return (spa_vdev_exit(spa, NULL, txg, ENODEV));
4728 if (!oldvd->vdev_ops->vdev_op_leaf)
4729 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4731 pvd = oldvd->vdev_parent;
4733 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0,
4734 VDEV_ALLOC_ATTACH)) != 0)
4735 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
4737 if (newrootvd->vdev_children != 1)
4738 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
4740 newvd = newrootvd->vdev_child[0];
4742 if (!newvd->vdev_ops->vdev_op_leaf)
4743 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
4745 if ((error = vdev_create(newrootvd, txg, replacing)) != 0)
4746 return (spa_vdev_exit(spa, newrootvd, txg, error));
4749 * Spares can't replace logs
4751 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare)
4752 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4756 * For attach, the only allowable parent is a mirror or the root
4759 if (pvd->vdev_ops != &vdev_mirror_ops &&
4760 pvd->vdev_ops != &vdev_root_ops)
4761 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4763 pvops = &vdev_mirror_ops;
4766 * Active hot spares can only be replaced by inactive hot
4769 if (pvd->vdev_ops == &vdev_spare_ops &&
4770 oldvd->vdev_isspare &&
4771 !spa_has_spare(spa, newvd->vdev_guid))
4772 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4775 * If the source is a hot spare, and the parent isn't already a
4776 * spare, then we want to create a new hot spare. Otherwise, we
4777 * want to create a replacing vdev. The user is not allowed to
4778 * attach to a spared vdev child unless the 'isspare' state is
4779 * the same (spare replaces spare, non-spare replaces
4782 if (pvd->vdev_ops == &vdev_replacing_ops &&
4783 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) {
4784 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4785 } else if (pvd->vdev_ops == &vdev_spare_ops &&
4786 newvd->vdev_isspare != oldvd->vdev_isspare) {
4787 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4790 if (newvd->vdev_isspare)
4791 pvops = &vdev_spare_ops;
4793 pvops = &vdev_replacing_ops;
4797 * Make sure the new device is big enough.
4799 if (newvd->vdev_asize < vdev_get_min_asize(oldvd))
4800 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW));
4803 * The new device cannot have a higher alignment requirement
4804 * than the top-level vdev.
4806 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift)
4807 return (spa_vdev_exit(spa, newrootvd, txg, EDOM));
4810 * If this is an in-place replacement, update oldvd's path and devid
4811 * to make it distinguishable from newvd, and unopenable from now on.
4813 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) {
4814 spa_strfree(oldvd->vdev_path);
4815 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5,
4817 (void) sprintf(oldvd->vdev_path, "%s/%s",
4818 newvd->vdev_path, "old");
4819 if (oldvd->vdev_devid != NULL) {
4820 spa_strfree(oldvd->vdev_devid);
4821 oldvd->vdev_devid = NULL;
4825 /* mark the device being resilvered */
4826 newvd->vdev_resilver_txg = txg;
4829 * If the parent is not a mirror, or if we're replacing, insert the new
4830 * mirror/replacing/spare vdev above oldvd.
4832 if (pvd->vdev_ops != pvops)
4833 pvd = vdev_add_parent(oldvd, pvops);
4835 ASSERT(pvd->vdev_top->vdev_parent == rvd);
4836 ASSERT(pvd->vdev_ops == pvops);
4837 ASSERT(oldvd->vdev_parent == pvd);
4840 * Extract the new device from its root and add it to pvd.
4842 vdev_remove_child(newrootvd, newvd);
4843 newvd->vdev_id = pvd->vdev_children;
4844 newvd->vdev_crtxg = oldvd->vdev_crtxg;
4845 vdev_add_child(pvd, newvd);
4847 tvd = newvd->vdev_top;
4848 ASSERT(pvd->vdev_top == tvd);
4849 ASSERT(tvd->vdev_parent == rvd);
4851 vdev_config_dirty(tvd);
4854 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
4855 * for any dmu_sync-ed blocks. It will propagate upward when
4856 * spa_vdev_exit() calls vdev_dtl_reassess().
4858 dtl_max_txg = txg + TXG_CONCURRENT_STATES;
4860 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL,
4861 dtl_max_txg - TXG_INITIAL);
4863 if (newvd->vdev_isspare) {
4864 spa_spare_activate(newvd);
4865 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE);
4868 oldvdpath = spa_strdup(oldvd->vdev_path);
4869 newvdpath = spa_strdup(newvd->vdev_path);
4870 newvd_isspare = newvd->vdev_isspare;
4873 * Mark newvd's DTL dirty in this txg.
4875 vdev_dirty(tvd, VDD_DTL, newvd, txg);
4878 * Schedule the resilver to restart in the future. We do this to
4879 * ensure that dmu_sync-ed blocks have been stitched into the
4880 * respective datasets.
4882 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg);
4887 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0);
4889 spa_history_log_internal(spa, "vdev attach", NULL,
4890 "%s vdev=%s %s vdev=%s",
4891 replacing && newvd_isspare ? "spare in" :
4892 replacing ? "replace" : "attach", newvdpath,
4893 replacing ? "for" : "to", oldvdpath);
4895 spa_strfree(oldvdpath);
4896 spa_strfree(newvdpath);
4898 if (spa->spa_bootfs)
4899 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH);
4905 * Detach a device from a mirror or replacing vdev.
4907 * If 'replace_done' is specified, only detach if the parent
4908 * is a replacing vdev.
4911 spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done)
4915 vdev_t *rvd = spa->spa_root_vdev;
4916 vdev_t *vd, *pvd, *cvd, *tvd;
4917 boolean_t unspare = B_FALSE;
4918 uint64_t unspare_guid = 0;
4921 ASSERT(spa_writeable(spa));
4923 txg = spa_vdev_enter(spa);
4925 vd = spa_lookup_by_guid(spa, guid, B_FALSE);
4928 return (spa_vdev_exit(spa, NULL, txg, ENODEV));
4930 if (!vd->vdev_ops->vdev_op_leaf)
4931 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4933 pvd = vd->vdev_parent;
4936 * If the parent/child relationship is not as expected, don't do it.
4937 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4938 * vdev that's replacing B with C. The user's intent in replacing
4939 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4940 * the replace by detaching C, the expected behavior is to end up
4941 * M(A,B). But suppose that right after deciding to detach C,
4942 * the replacement of B completes. We would have M(A,C), and then
4943 * ask to detach C, which would leave us with just A -- not what
4944 * the user wanted. To prevent this, we make sure that the
4945 * parent/child relationship hasn't changed -- in this example,
4946 * that C's parent is still the replacing vdev R.
4948 if (pvd->vdev_guid != pguid && pguid != 0)
4949 return (spa_vdev_exit(spa, NULL, txg, EBUSY));
4952 * Only 'replacing' or 'spare' vdevs can be replaced.
4954 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops &&
4955 pvd->vdev_ops != &vdev_spare_ops)
4956 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4958 ASSERT(pvd->vdev_ops != &vdev_spare_ops ||
4959 spa_version(spa) >= SPA_VERSION_SPARES);
4962 * Only mirror, replacing, and spare vdevs support detach.
4964 if (pvd->vdev_ops != &vdev_replacing_ops &&
4965 pvd->vdev_ops != &vdev_mirror_ops &&
4966 pvd->vdev_ops != &vdev_spare_ops)
4967 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4970 * If this device has the only valid copy of some data,
4971 * we cannot safely detach it.
4973 if (vdev_dtl_required(vd))
4974 return (spa_vdev_exit(spa, NULL, txg, EBUSY));
4976 ASSERT(pvd->vdev_children >= 2);
4979 * If we are detaching the second disk from a replacing vdev, then
4980 * check to see if we changed the original vdev's path to have "/old"
4981 * at the end in spa_vdev_attach(). If so, undo that change now.
4983 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 &&
4984 vd->vdev_path != NULL) {
4985 size_t len = strlen(vd->vdev_path);
4987 for (int c = 0; c < pvd->vdev_children; c++) {
4988 cvd = pvd->vdev_child[c];
4990 if (cvd == vd || cvd->vdev_path == NULL)
4993 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 &&
4994 strcmp(cvd->vdev_path + len, "/old") == 0) {
4995 spa_strfree(cvd->vdev_path);
4996 cvd->vdev_path = spa_strdup(vd->vdev_path);
5003 * If we are detaching the original disk from a spare, then it implies
5004 * that the spare should become a real disk, and be removed from the
5005 * active spare list for the pool.
5007 if (pvd->vdev_ops == &vdev_spare_ops &&
5009 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare)
5013 * Erase the disk labels so the disk can be used for other things.
5014 * This must be done after all other error cases are handled,
5015 * but before we disembowel vd (so we can still do I/O to it).
5016 * But if we can't do it, don't treat the error as fatal --
5017 * it may be that the unwritability of the disk is the reason
5018 * it's being detached!
5020 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
5023 * Remove vd from its parent and compact the parent's children.
5025 vdev_remove_child(pvd, vd);
5026 vdev_compact_children(pvd);
5029 * Remember one of the remaining children so we can get tvd below.
5031 cvd = pvd->vdev_child[pvd->vdev_children - 1];
5034 * If we need to remove the remaining child from the list of hot spares,
5035 * do it now, marking the vdev as no longer a spare in the process.
5036 * We must do this before vdev_remove_parent(), because that can
5037 * change the GUID if it creates a new toplevel GUID. For a similar
5038 * reason, we must remove the spare now, in the same txg as the detach;
5039 * otherwise someone could attach a new sibling, change the GUID, and
5040 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
5043 ASSERT(cvd->vdev_isspare);
5044 spa_spare_remove(cvd);
5045 unspare_guid = cvd->vdev_guid;
5046 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE);
5047 cvd->vdev_unspare = B_TRUE;
5051 * If the parent mirror/replacing vdev only has one child,
5052 * the parent is no longer needed. Remove it from the tree.
5054 if (pvd->vdev_children == 1) {
5055 if (pvd->vdev_ops == &vdev_spare_ops)
5056 cvd->vdev_unspare = B_FALSE;
5057 vdev_remove_parent(cvd);
5062 * We don't set tvd until now because the parent we just removed
5063 * may have been the previous top-level vdev.
5065 tvd = cvd->vdev_top;
5066 ASSERT(tvd->vdev_parent == rvd);
5069 * Reevaluate the parent vdev state.
5071 vdev_propagate_state(cvd);
5074 * If the 'autoexpand' property is set on the pool then automatically
5075 * try to expand the size of the pool. For example if the device we
5076 * just detached was smaller than the others, it may be possible to
5077 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
5078 * first so that we can obtain the updated sizes of the leaf vdevs.
5080 if (spa->spa_autoexpand) {
5082 vdev_expand(tvd, txg);
5085 vdev_config_dirty(tvd);
5088 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
5089 * vd->vdev_detached is set and free vd's DTL object in syncing context.
5090 * But first make sure we're not on any *other* txg's DTL list, to
5091 * prevent vd from being accessed after it's freed.
5093 vdpath = spa_strdup(vd->vdev_path);
5094 for (int t = 0; t < TXG_SIZE; t++)
5095 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t);
5096 vd->vdev_detached = B_TRUE;
5097 vdev_dirty(tvd, VDD_DTL, vd, txg);
5099 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE);
5101 /* hang on to the spa before we release the lock */
5102 spa_open_ref(spa, FTAG);
5104 error = spa_vdev_exit(spa, vd, txg, 0);
5106 spa_history_log_internal(spa, "detach", NULL,
5108 spa_strfree(vdpath);
5111 * If this was the removal of the original device in a hot spare vdev,
5112 * then we want to go through and remove the device from the hot spare
5113 * list of every other pool.
5116 spa_t *altspa = NULL;
5118 mutex_enter(&spa_namespace_lock);
5119 while ((altspa = spa_next(altspa)) != NULL) {
5120 if (altspa->spa_state != POOL_STATE_ACTIVE ||
5124 spa_open_ref(altspa, FTAG);
5125 mutex_exit(&spa_namespace_lock);
5126 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE);
5127 mutex_enter(&spa_namespace_lock);
5128 spa_close(altspa, FTAG);
5130 mutex_exit(&spa_namespace_lock);
5132 /* search the rest of the vdevs for spares to remove */
5133 spa_vdev_resilver_done(spa);
5136 /* all done with the spa; OK to release */
5137 mutex_enter(&spa_namespace_lock);
5138 spa_close(spa, FTAG);
5139 mutex_exit(&spa_namespace_lock);
5145 * Split a set of devices from their mirrors, and create a new pool from them.
5148 spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
5149 nvlist_t *props, boolean_t exp)
5152 uint64_t txg, *glist;
5154 uint_t c, children, lastlog;
5155 nvlist_t **child, *nvl, *tmp;
5157 char *altroot = NULL;
5158 vdev_t *rvd, **vml = NULL; /* vdev modify list */
5159 boolean_t activate_slog;
5161 ASSERT(spa_writeable(spa));
5163 txg = spa_vdev_enter(spa);
5165 /* clear the log and flush everything up to now */
5166 activate_slog = spa_passivate_log(spa);
5167 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
5168 error = spa_offline_log(spa);
5169 txg = spa_vdev_config_enter(spa);
5172 spa_activate_log(spa);
5175 return (spa_vdev_exit(spa, NULL, txg, error));
5177 /* check new spa name before going any further */
5178 if (spa_lookup(newname) != NULL)
5179 return (spa_vdev_exit(spa, NULL, txg, EEXIST));
5182 * scan through all the children to ensure they're all mirrors
5184 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 ||
5185 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child,
5187 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
5189 /* first, check to ensure we've got the right child count */
5190 rvd = spa->spa_root_vdev;
5192 for (c = 0; c < rvd->vdev_children; c++) {
5193 vdev_t *vd = rvd->vdev_child[c];
5195 /* don't count the holes & logs as children */
5196 if (vd->vdev_islog || vd->vdev_ishole) {
5204 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children))
5205 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
5207 /* next, ensure no spare or cache devices are part of the split */
5208 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 ||
5209 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0)
5210 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
5212 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP);
5213 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP);
5215 /* then, loop over each vdev and validate it */
5216 for (c = 0; c < children; c++) {
5217 uint64_t is_hole = 0;
5219 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE,
5223 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole ||
5224 spa->spa_root_vdev->vdev_child[c]->vdev_islog) {
5227 error = SET_ERROR(EINVAL);
5232 /* which disk is going to be split? */
5233 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID,
5235 error = SET_ERROR(EINVAL);
5239 /* look it up in the spa */
5240 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE);
5241 if (vml[c] == NULL) {
5242 error = SET_ERROR(ENODEV);
5246 /* make sure there's nothing stopping the split */
5247 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops ||
5248 vml[c]->vdev_islog ||
5249 vml[c]->vdev_ishole ||
5250 vml[c]->vdev_isspare ||
5251 vml[c]->vdev_isl2cache ||
5252 !vdev_writeable(vml[c]) ||
5253 vml[c]->vdev_children != 0 ||
5254 vml[c]->vdev_state != VDEV_STATE_HEALTHY ||
5255 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) {
5256 error = SET_ERROR(EINVAL);
5260 if (vdev_dtl_required(vml[c])) {
5261 error = SET_ERROR(EBUSY);
5265 /* we need certain info from the top level */
5266 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY,
5267 vml[c]->vdev_top->vdev_ms_array) == 0);
5268 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT,
5269 vml[c]->vdev_top->vdev_ms_shift) == 0);
5270 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE,
5271 vml[c]->vdev_top->vdev_asize) == 0);
5272 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT,
5273 vml[c]->vdev_top->vdev_ashift) == 0);
5277 kmem_free(vml, children * sizeof (vdev_t *));
5278 kmem_free(glist, children * sizeof (uint64_t));
5279 return (spa_vdev_exit(spa, NULL, txg, error));
5282 /* stop writers from using the disks */
5283 for (c = 0; c < children; c++) {
5285 vml[c]->vdev_offline = B_TRUE;
5287 vdev_reopen(spa->spa_root_vdev);
5290 * Temporarily record the splitting vdevs in the spa config. This
5291 * will disappear once the config is regenerated.
5293 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
5294 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST,
5295 glist, children) == 0);
5296 kmem_free(glist, children * sizeof (uint64_t));
5298 mutex_enter(&spa->spa_props_lock);
5299 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT,
5301 mutex_exit(&spa->spa_props_lock);
5302 spa->spa_config_splitting = nvl;
5303 vdev_config_dirty(spa->spa_root_vdev);
5305 /* configure and create the new pool */
5306 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0);
5307 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
5308 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0);
5309 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION,
5310 spa_version(spa)) == 0);
5311 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG,
5312 spa->spa_config_txg) == 0);
5313 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID,
5314 spa_generate_guid(NULL)) == 0);
5315 (void) nvlist_lookup_string(props,
5316 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
5318 /* add the new pool to the namespace */
5319 newspa = spa_add(newname, config, altroot);
5320 newspa->spa_config_txg = spa->spa_config_txg;
5321 spa_set_log_state(newspa, SPA_LOG_CLEAR);
5323 /* release the spa config lock, retaining the namespace lock */
5324 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
5326 if (zio_injection_enabled)
5327 zio_handle_panic_injection(spa, FTAG, 1);
5329 spa_activate(newspa, spa_mode_global);
5330 spa_async_suspend(newspa);
5333 /* mark that we are creating new spa by splitting */
5334 newspa->spa_splitting_newspa = B_TRUE;
5336 /* create the new pool from the disks of the original pool */
5337 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE);
5339 newspa->spa_splitting_newspa = B_FALSE;
5344 /* if that worked, generate a real config for the new pool */
5345 if (newspa->spa_root_vdev != NULL) {
5346 VERIFY(nvlist_alloc(&newspa->spa_config_splitting,
5347 NV_UNIQUE_NAME, KM_SLEEP) == 0);
5348 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting,
5349 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0);
5350 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL,
5355 if (props != NULL) {
5356 spa_configfile_set(newspa, props, B_FALSE);
5357 error = spa_prop_set(newspa, props);
5362 /* flush everything */
5363 txg = spa_vdev_config_enter(newspa);
5364 vdev_config_dirty(newspa->spa_root_vdev);
5365 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG);
5367 if (zio_injection_enabled)
5368 zio_handle_panic_injection(spa, FTAG, 2);
5370 spa_async_resume(newspa);
5372 /* finally, update the original pool's config */
5373 txg = spa_vdev_config_enter(spa);
5374 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
5375 error = dmu_tx_assign(tx, TXG_WAIT);
5378 for (c = 0; c < children; c++) {
5379 if (vml[c] != NULL) {
5382 spa_history_log_internal(spa, "detach", tx,
5383 "vdev=%s", vml[c]->vdev_path);
5387 vdev_config_dirty(spa->spa_root_vdev);
5388 spa->spa_config_splitting = NULL;
5392 (void) spa_vdev_exit(spa, NULL, txg, 0);
5394 if (zio_injection_enabled)
5395 zio_handle_panic_injection(spa, FTAG, 3);
5397 /* split is complete; log a history record */
5398 spa_history_log_internal(newspa, "split", NULL,
5399 "from pool %s", spa_name(spa));
5401 kmem_free(vml, children * sizeof (vdev_t *));
5403 /* if we're not going to mount the filesystems in userland, export */
5405 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL,
5412 spa_deactivate(newspa);
5415 txg = spa_vdev_config_enter(spa);
5417 /* re-online all offlined disks */
5418 for (c = 0; c < children; c++) {
5420 vml[c]->vdev_offline = B_FALSE;
5422 vdev_reopen(spa->spa_root_vdev);
5424 nvlist_free(spa->spa_config_splitting);
5425 spa->spa_config_splitting = NULL;
5426 (void) spa_vdev_exit(spa, NULL, txg, error);
5428 kmem_free(vml, children * sizeof (vdev_t *));
5433 spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid)
5435 for (int i = 0; i < count; i++) {
5438 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID,
5441 if (guid == target_guid)
5449 spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count,
5450 nvlist_t *dev_to_remove)
5452 nvlist_t **newdev = NULL;
5455 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP);
5457 for (int i = 0, j = 0; i < count; i++) {
5458 if (dev[i] == dev_to_remove)
5460 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0);
5463 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0);
5464 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0);
5466 for (int i = 0; i < count - 1; i++)
5467 nvlist_free(newdev[i]);
5470 kmem_free(newdev, (count - 1) * sizeof (void *));
5474 * Evacuate the device.
5477 spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd)
5482 ASSERT(MUTEX_HELD(&spa_namespace_lock));
5483 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
5484 ASSERT(vd == vd->vdev_top);
5487 * Evacuate the device. We don't hold the config lock as writer
5488 * since we need to do I/O but we do keep the
5489 * spa_namespace_lock held. Once this completes the device
5490 * should no longer have any blocks allocated on it.
5492 if (vd->vdev_islog) {
5493 if (vd->vdev_stat.vs_alloc != 0)
5494 error = spa_offline_log(spa);
5496 error = SET_ERROR(ENOTSUP);
5503 * The evacuation succeeded. Remove any remaining MOS metadata
5504 * associated with this vdev, and wait for these changes to sync.
5506 ASSERT0(vd->vdev_stat.vs_alloc);
5507 txg = spa_vdev_config_enter(spa);
5508 vd->vdev_removing = B_TRUE;
5509 vdev_dirty_leaves(vd, VDD_DTL, txg);
5510 vdev_config_dirty(vd);
5511 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
5517 * Complete the removal by cleaning up the namespace.
5520 spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd)
5522 vdev_t *rvd = spa->spa_root_vdev;
5523 uint64_t id = vd->vdev_id;
5524 boolean_t last_vdev = (id == (rvd->vdev_children - 1));
5526 ASSERT(MUTEX_HELD(&spa_namespace_lock));
5527 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
5528 ASSERT(vd == vd->vdev_top);
5531 * Only remove any devices which are empty.
5533 if (vd->vdev_stat.vs_alloc != 0)
5536 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
5538 if (list_link_active(&vd->vdev_state_dirty_node))
5539 vdev_state_clean(vd);
5540 if (list_link_active(&vd->vdev_config_dirty_node))
5541 vdev_config_clean(vd);
5546 vdev_compact_children(rvd);
5548 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops);
5549 vdev_add_child(rvd, vd);
5551 vdev_config_dirty(rvd);
5554 * Reassess the health of our root vdev.
5560 * Remove a device from the pool -
5562 * Removing a device from the vdev namespace requires several steps
5563 * and can take a significant amount of time. As a result we use
5564 * the spa_vdev_config_[enter/exit] functions which allow us to
5565 * grab and release the spa_config_lock while still holding the namespace
5566 * lock. During each step the configuration is synced out.
5568 * Currently, this supports removing only hot spares, slogs, and level 2 ARC
5572 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare)
5575 metaslab_group_t *mg;
5576 nvlist_t **spares, **l2cache, *nv;
5578 uint_t nspares, nl2cache;
5580 boolean_t locked = MUTEX_HELD(&spa_namespace_lock);
5582 ASSERT(spa_writeable(spa));
5585 txg = spa_vdev_enter(spa);
5587 vd = spa_lookup_by_guid(spa, guid, B_FALSE);
5589 if (spa->spa_spares.sav_vdevs != NULL &&
5590 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
5591 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 &&
5592 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) {
5594 * Only remove the hot spare if it's not currently in use
5597 if (vd == NULL || unspare) {
5598 spa_vdev_remove_aux(spa->spa_spares.sav_config,
5599 ZPOOL_CONFIG_SPARES, spares, nspares, nv);
5600 spa_load_spares(spa);
5601 spa->spa_spares.sav_sync = B_TRUE;
5603 error = SET_ERROR(EBUSY);
5605 } else if (spa->spa_l2cache.sav_vdevs != NULL &&
5606 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
5607 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 &&
5608 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) {
5610 * Cache devices can always be removed.
5612 spa_vdev_remove_aux(spa->spa_l2cache.sav_config,
5613 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv);
5614 spa_load_l2cache(spa);
5615 spa->spa_l2cache.sav_sync = B_TRUE;
5616 } else if (vd != NULL && vd->vdev_islog) {
5618 ASSERT(vd == vd->vdev_top);
5623 * Stop allocating from this vdev.
5625 metaslab_group_passivate(mg);
5628 * Wait for the youngest allocations and frees to sync,
5629 * and then wait for the deferral of those frees to finish.
5631 spa_vdev_config_exit(spa, NULL,
5632 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG);
5635 * Attempt to evacuate the vdev.
5637 error = spa_vdev_remove_evacuate(spa, vd);
5639 txg = spa_vdev_config_enter(spa);
5642 * If we couldn't evacuate the vdev, unwind.
5645 metaslab_group_activate(mg);
5646 return (spa_vdev_exit(spa, NULL, txg, error));
5650 * Clean up the vdev namespace.
5652 spa_vdev_remove_from_namespace(spa, vd);
5654 } else if (vd != NULL) {
5656 * Normal vdevs cannot be removed (yet).
5658 error = SET_ERROR(ENOTSUP);
5661 * There is no vdev of any kind with the specified guid.
5663 error = SET_ERROR(ENOENT);
5667 return (spa_vdev_exit(spa, NULL, txg, error));
5673 * Find any device that's done replacing, or a vdev marked 'unspare' that's
5674 * currently spared, so we can detach it.
5677 spa_vdev_resilver_done_hunt(vdev_t *vd)
5679 vdev_t *newvd, *oldvd;
5681 for (int c = 0; c < vd->vdev_children; c++) {
5682 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]);
5688 * Check for a completed replacement. We always consider the first
5689 * vdev in the list to be the oldest vdev, and the last one to be
5690 * the newest (see spa_vdev_attach() for how that works). In
5691 * the case where the newest vdev is faulted, we will not automatically
5692 * remove it after a resilver completes. This is OK as it will require
5693 * user intervention to determine which disk the admin wishes to keep.
5695 if (vd->vdev_ops == &vdev_replacing_ops) {
5696 ASSERT(vd->vdev_children > 1);
5698 newvd = vd->vdev_child[vd->vdev_children - 1];
5699 oldvd = vd->vdev_child[0];
5701 if (vdev_dtl_empty(newvd, DTL_MISSING) &&
5702 vdev_dtl_empty(newvd, DTL_OUTAGE) &&
5703 !vdev_dtl_required(oldvd))
5708 * Check for a completed resilver with the 'unspare' flag set.
5710 if (vd->vdev_ops == &vdev_spare_ops) {
5711 vdev_t *first = vd->vdev_child[0];
5712 vdev_t *last = vd->vdev_child[vd->vdev_children - 1];
5714 if (last->vdev_unspare) {
5717 } else if (first->vdev_unspare) {
5724 if (oldvd != NULL &&
5725 vdev_dtl_empty(newvd, DTL_MISSING) &&
5726 vdev_dtl_empty(newvd, DTL_OUTAGE) &&
5727 !vdev_dtl_required(oldvd))
5731 * If there are more than two spares attached to a disk,
5732 * and those spares are not required, then we want to
5733 * attempt to free them up now so that they can be used
5734 * by other pools. Once we're back down to a single
5735 * disk+spare, we stop removing them.
5737 if (vd->vdev_children > 2) {
5738 newvd = vd->vdev_child[1];
5740 if (newvd->vdev_isspare && last->vdev_isspare &&
5741 vdev_dtl_empty(last, DTL_MISSING) &&
5742 vdev_dtl_empty(last, DTL_OUTAGE) &&
5743 !vdev_dtl_required(newvd))
5752 spa_vdev_resilver_done(spa_t *spa)
5754 vdev_t *vd, *pvd, *ppvd;
5755 uint64_t guid, sguid, pguid, ppguid;
5757 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
5759 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) {
5760 pvd = vd->vdev_parent;
5761 ppvd = pvd->vdev_parent;
5762 guid = vd->vdev_guid;
5763 pguid = pvd->vdev_guid;
5764 ppguid = ppvd->vdev_guid;
5767 * If we have just finished replacing a hot spared device, then
5768 * we need to detach the parent's first child (the original hot
5771 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 &&
5772 ppvd->vdev_children == 2) {
5773 ASSERT(pvd->vdev_ops == &vdev_replacing_ops);
5774 sguid = ppvd->vdev_child[1]->vdev_guid;
5776 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd));
5778 spa_config_exit(spa, SCL_ALL, FTAG);
5779 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0)
5781 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0)
5783 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
5786 spa_config_exit(spa, SCL_ALL, FTAG);
5790 * Update the stored path or FRU for this vdev.
5793 spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value,
5797 boolean_t sync = B_FALSE;
5799 ASSERT(spa_writeable(spa));
5801 spa_vdev_state_enter(spa, SCL_ALL);
5803 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
5804 return (spa_vdev_state_exit(spa, NULL, ENOENT));
5806 if (!vd->vdev_ops->vdev_op_leaf)
5807 return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
5810 if (strcmp(value, vd->vdev_path) != 0) {
5811 spa_strfree(vd->vdev_path);
5812 vd->vdev_path = spa_strdup(value);
5816 if (vd->vdev_fru == NULL) {
5817 vd->vdev_fru = spa_strdup(value);
5819 } else if (strcmp(value, vd->vdev_fru) != 0) {
5820 spa_strfree(vd->vdev_fru);
5821 vd->vdev_fru = spa_strdup(value);
5826 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0));
5830 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath)
5832 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE));
5836 spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru)
5838 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE));
5842 * ==========================================================================
5844 * ==========================================================================
5848 spa_scan_stop(spa_t *spa)
5850 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
5851 if (dsl_scan_resilvering(spa->spa_dsl_pool))
5852 return (SET_ERROR(EBUSY));
5853 return (dsl_scan_cancel(spa->spa_dsl_pool));
5857 spa_scan(spa_t *spa, pool_scan_func_t func)
5859 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
5861 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE)
5862 return (SET_ERROR(ENOTSUP));
5865 * If a resilver was requested, but there is no DTL on a
5866 * writeable leaf device, we have nothing to do.
5868 if (func == POOL_SCAN_RESILVER &&
5869 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) {
5870 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE);
5874 return (dsl_scan(spa->spa_dsl_pool, func));
5878 * ==========================================================================
5879 * SPA async task processing
5880 * ==========================================================================
5884 spa_async_remove(spa_t *spa, vdev_t *vd)
5886 if (vd->vdev_remove_wanted) {
5887 vd->vdev_remove_wanted = B_FALSE;
5888 vd->vdev_delayed_close = B_FALSE;
5889 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE);
5892 * We want to clear the stats, but we don't want to do a full
5893 * vdev_clear() as that will cause us to throw away
5894 * degraded/faulted state as well as attempt to reopen the
5895 * device, all of which is a waste.
5897 vd->vdev_stat.vs_read_errors = 0;
5898 vd->vdev_stat.vs_write_errors = 0;
5899 vd->vdev_stat.vs_checksum_errors = 0;
5901 vdev_state_dirty(vd->vdev_top);
5904 for (int c = 0; c < vd->vdev_children; c++)
5905 spa_async_remove(spa, vd->vdev_child[c]);
5909 spa_async_probe(spa_t *spa, vdev_t *vd)
5911 if (vd->vdev_probe_wanted) {
5912 vd->vdev_probe_wanted = B_FALSE;
5913 vdev_reopen(vd); /* vdev_open() does the actual probe */
5916 for (int c = 0; c < vd->vdev_children; c++)
5917 spa_async_probe(spa, vd->vdev_child[c]);
5921 spa_async_autoexpand(spa_t *spa, vdev_t *vd)
5927 if (!spa->spa_autoexpand)
5930 for (int c = 0; c < vd->vdev_children; c++) {
5931 vdev_t *cvd = vd->vdev_child[c];
5932 spa_async_autoexpand(spa, cvd);
5935 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL)
5938 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
5939 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath);
5941 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0);
5942 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0);
5944 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS,
5945 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP);
5948 kmem_free(physpath, MAXPATHLEN);
5952 spa_async_thread(void *arg)
5957 ASSERT(spa->spa_sync_on);
5959 mutex_enter(&spa->spa_async_lock);
5960 tasks = spa->spa_async_tasks;
5961 spa->spa_async_tasks &= SPA_ASYNC_REMOVE;
5962 mutex_exit(&spa->spa_async_lock);
5965 * See if the config needs to be updated.
5967 if (tasks & SPA_ASYNC_CONFIG_UPDATE) {
5968 uint64_t old_space, new_space;
5970 mutex_enter(&spa_namespace_lock);
5971 old_space = metaslab_class_get_space(spa_normal_class(spa));
5972 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
5973 new_space = metaslab_class_get_space(spa_normal_class(spa));
5974 mutex_exit(&spa_namespace_lock);
5977 * If the pool grew as a result of the config update,
5978 * then log an internal history event.
5980 if (new_space != old_space) {
5981 spa_history_log_internal(spa, "vdev online", NULL,
5982 "pool '%s' size: %llu(+%llu)",
5983 spa_name(spa), new_space, new_space - old_space);
5987 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) {
5988 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
5989 spa_async_autoexpand(spa, spa->spa_root_vdev);
5990 spa_config_exit(spa, SCL_CONFIG, FTAG);
5994 * See if any devices need to be probed.
5996 if (tasks & SPA_ASYNC_PROBE) {
5997 spa_vdev_state_enter(spa, SCL_NONE);
5998 spa_async_probe(spa, spa->spa_root_vdev);
5999 (void) spa_vdev_state_exit(spa, NULL, 0);
6003 * If any devices are done replacing, detach them.
6005 if (tasks & SPA_ASYNC_RESILVER_DONE)
6006 spa_vdev_resilver_done(spa);
6009 * Kick off a resilver.
6011 if (tasks & SPA_ASYNC_RESILVER)
6012 dsl_resilver_restart(spa->spa_dsl_pool, 0);
6015 * Let the world know that we're done.
6017 mutex_enter(&spa->spa_async_lock);
6018 spa->spa_async_thread = NULL;
6019 cv_broadcast(&spa->spa_async_cv);
6020 mutex_exit(&spa->spa_async_lock);
6025 spa_async_thread_vd(void *arg)
6030 ASSERT(spa->spa_sync_on);
6032 mutex_enter(&spa->spa_async_lock);
6033 tasks = spa->spa_async_tasks;
6035 spa->spa_async_tasks &= ~SPA_ASYNC_REMOVE;
6036 mutex_exit(&spa->spa_async_lock);
6039 * See if any devices need to be marked REMOVED.
6041 if (tasks & SPA_ASYNC_REMOVE) {
6042 spa_vdev_state_enter(spa, SCL_NONE);
6043 spa_async_remove(spa, spa->spa_root_vdev);
6044 for (int i = 0; i < spa->spa_l2cache.sav_count; i++)
6045 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]);
6046 for (int i = 0; i < spa->spa_spares.sav_count; i++)
6047 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]);
6048 (void) spa_vdev_state_exit(spa, NULL, 0);
6052 * Let the world know that we're done.
6054 mutex_enter(&spa->spa_async_lock);
6055 tasks = spa->spa_async_tasks;
6056 if ((tasks & SPA_ASYNC_REMOVE) != 0)
6058 spa->spa_async_thread_vd = NULL;
6059 cv_broadcast(&spa->spa_async_cv);
6060 mutex_exit(&spa->spa_async_lock);
6065 spa_async_suspend(spa_t *spa)
6067 mutex_enter(&spa->spa_async_lock);
6068 spa->spa_async_suspended++;
6069 while (spa->spa_async_thread != NULL &&
6070 spa->spa_async_thread_vd != NULL)
6071 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock);
6072 mutex_exit(&spa->spa_async_lock);
6076 spa_async_resume(spa_t *spa)
6078 mutex_enter(&spa->spa_async_lock);
6079 ASSERT(spa->spa_async_suspended != 0);
6080 spa->spa_async_suspended--;
6081 mutex_exit(&spa->spa_async_lock);
6085 spa_async_tasks_pending(spa_t *spa)
6087 uint_t non_config_tasks;
6089 boolean_t config_task_suspended;
6091 non_config_tasks = spa->spa_async_tasks & ~(SPA_ASYNC_CONFIG_UPDATE |
6093 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE;
6094 if (spa->spa_ccw_fail_time == 0) {
6095 config_task_suspended = B_FALSE;
6097 config_task_suspended =
6098 (gethrtime() - spa->spa_ccw_fail_time) <
6099 (zfs_ccw_retry_interval * NANOSEC);
6102 return (non_config_tasks || (config_task && !config_task_suspended));
6106 spa_async_dispatch(spa_t *spa)
6108 mutex_enter(&spa->spa_async_lock);
6109 if (spa_async_tasks_pending(spa) &&
6110 !spa->spa_async_suspended &&
6111 spa->spa_async_thread == NULL &&
6113 spa->spa_async_thread = thread_create(NULL, 0,
6114 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri);
6115 mutex_exit(&spa->spa_async_lock);
6119 spa_async_dispatch_vd(spa_t *spa)
6121 mutex_enter(&spa->spa_async_lock);
6122 if ((spa->spa_async_tasks & SPA_ASYNC_REMOVE) != 0 &&
6123 !spa->spa_async_suspended &&
6124 spa->spa_async_thread_vd == NULL &&
6126 spa->spa_async_thread_vd = thread_create(NULL, 0,
6127 spa_async_thread_vd, spa, 0, &p0, TS_RUN, maxclsyspri);
6128 mutex_exit(&spa->spa_async_lock);
6132 spa_async_request(spa_t *spa, int task)
6134 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task);
6135 mutex_enter(&spa->spa_async_lock);
6136 spa->spa_async_tasks |= task;
6137 mutex_exit(&spa->spa_async_lock);
6138 spa_async_dispatch_vd(spa);
6142 * ==========================================================================
6143 * SPA syncing routines
6144 * ==========================================================================
6148 bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
6151 bpobj_enqueue(bpo, bp, tx);
6156 spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
6160 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp,
6161 BP_GET_PSIZE(bp), zio->io_flags));
6166 * Note: this simple function is not inlined to make it easier to dtrace the
6167 * amount of time spent syncing frees.
6170 spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx)
6172 zio_t *zio = zio_root(spa, NULL, NULL, 0);
6173 bplist_iterate(bpl, spa_free_sync_cb, zio, tx);
6174 VERIFY(zio_wait(zio) == 0);
6178 * Note: this simple function is not inlined to make it easier to dtrace the
6179 * amount of time spent syncing deferred frees.
6182 spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx)
6184 zio_t *zio = zio_root(spa, NULL, NULL, 0);
6185 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj,
6186 spa_free_sync_cb, zio, tx), ==, 0);
6187 VERIFY0(zio_wait(zio));
6192 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx)
6194 char *packed = NULL;
6199 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0);
6202 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
6203 * information. This avoids the dmu_buf_will_dirty() path and
6204 * saves us a pre-read to get data we don't actually care about.
6206 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE);
6207 packed = kmem_alloc(bufsize, KM_SLEEP);
6209 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR,
6211 bzero(packed + nvsize, bufsize - nvsize);
6213 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx);
6215 kmem_free(packed, bufsize);
6217 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db));
6218 dmu_buf_will_dirty(db, tx);
6219 *(uint64_t *)db->db_data = nvsize;
6220 dmu_buf_rele(db, FTAG);
6224 spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx,
6225 const char *config, const char *entry)
6235 * Update the MOS nvlist describing the list of available devices.
6236 * spa_validate_aux() will have already made sure this nvlist is
6237 * valid and the vdevs are labeled appropriately.
6239 if (sav->sav_object == 0) {
6240 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset,
6241 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE,
6242 sizeof (uint64_t), tx);
6243 VERIFY(zap_update(spa->spa_meta_objset,
6244 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1,
6245 &sav->sav_object, tx) == 0);
6248 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
6249 if (sav->sav_count == 0) {
6250 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0);
6252 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
6253 for (i = 0; i < sav->sav_count; i++)
6254 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i],
6255 B_FALSE, VDEV_CONFIG_L2CACHE);
6256 VERIFY(nvlist_add_nvlist_array(nvroot, config, list,
6257 sav->sav_count) == 0);
6258 for (i = 0; i < sav->sav_count; i++)
6259 nvlist_free(list[i]);
6260 kmem_free(list, sav->sav_count * sizeof (void *));
6263 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx);
6264 nvlist_free(nvroot);
6266 sav->sav_sync = B_FALSE;
6270 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx)
6274 if (list_is_empty(&spa->spa_config_dirty_list))
6277 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
6279 config = spa_config_generate(spa, spa->spa_root_vdev,
6280 dmu_tx_get_txg(tx), B_FALSE);
6283 * If we're upgrading the spa version then make sure that
6284 * the config object gets updated with the correct version.
6286 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version)
6287 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION,
6288 spa->spa_uberblock.ub_version);
6290 spa_config_exit(spa, SCL_STATE, FTAG);
6292 if (spa->spa_config_syncing)
6293 nvlist_free(spa->spa_config_syncing);
6294 spa->spa_config_syncing = config;
6296 spa_sync_nvlist(spa, spa->spa_config_object, config, tx);
6300 spa_sync_version(void *arg, dmu_tx_t *tx)
6302 uint64_t *versionp = arg;
6303 uint64_t version = *versionp;
6304 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
6307 * Setting the version is special cased when first creating the pool.
6309 ASSERT(tx->tx_txg != TXG_INITIAL);
6311 ASSERT(SPA_VERSION_IS_SUPPORTED(version));
6312 ASSERT(version >= spa_version(spa));
6314 spa->spa_uberblock.ub_version = version;
6315 vdev_config_dirty(spa->spa_root_vdev);
6316 spa_history_log_internal(spa, "set", tx, "version=%lld", version);
6320 * Set zpool properties.
6323 spa_sync_props(void *arg, dmu_tx_t *tx)
6325 nvlist_t *nvp = arg;
6326 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
6327 objset_t *mos = spa->spa_meta_objset;
6328 nvpair_t *elem = NULL;
6330 mutex_enter(&spa->spa_props_lock);
6332 while ((elem = nvlist_next_nvpair(nvp, elem))) {
6334 char *strval, *fname;
6336 const char *propname;
6337 zprop_type_t proptype;
6340 switch (prop = zpool_name_to_prop(nvpair_name(elem))) {
6343 * We checked this earlier in spa_prop_validate().
6345 ASSERT(zpool_prop_feature(nvpair_name(elem)));
6347 fname = strchr(nvpair_name(elem), '@') + 1;
6348 VERIFY0(zfeature_lookup_name(fname, &fid));
6350 spa_feature_enable(spa, fid, tx);
6351 spa_history_log_internal(spa, "set", tx,
6352 "%s=enabled", nvpair_name(elem));
6355 case ZPOOL_PROP_VERSION:
6356 intval = fnvpair_value_uint64(elem);
6358 * The version is synced seperatly before other
6359 * properties and should be correct by now.
6361 ASSERT3U(spa_version(spa), >=, intval);
6364 case ZPOOL_PROP_ALTROOT:
6366 * 'altroot' is a non-persistent property. It should
6367 * have been set temporarily at creation or import time.
6369 ASSERT(spa->spa_root != NULL);
6372 case ZPOOL_PROP_READONLY:
6373 case ZPOOL_PROP_CACHEFILE:
6375 * 'readonly' and 'cachefile' are also non-persisitent
6379 case ZPOOL_PROP_COMMENT:
6380 strval = fnvpair_value_string(elem);
6381 if (spa->spa_comment != NULL)
6382 spa_strfree(spa->spa_comment);
6383 spa->spa_comment = spa_strdup(strval);
6385 * We need to dirty the configuration on all the vdevs
6386 * so that their labels get updated. It's unnecessary
6387 * to do this for pool creation since the vdev's
6388 * configuratoin has already been dirtied.
6390 if (tx->tx_txg != TXG_INITIAL)
6391 vdev_config_dirty(spa->spa_root_vdev);
6392 spa_history_log_internal(spa, "set", tx,
6393 "%s=%s", nvpair_name(elem), strval);
6397 * Set pool property values in the poolprops mos object.
6399 if (spa->spa_pool_props_object == 0) {
6400 spa->spa_pool_props_object =
6401 zap_create_link(mos, DMU_OT_POOL_PROPS,
6402 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS,
6406 /* normalize the property name */
6407 propname = zpool_prop_to_name(prop);
6408 proptype = zpool_prop_get_type(prop);
6410 if (nvpair_type(elem) == DATA_TYPE_STRING) {
6411 ASSERT(proptype == PROP_TYPE_STRING);
6412 strval = fnvpair_value_string(elem);
6413 VERIFY0(zap_update(mos,
6414 spa->spa_pool_props_object, propname,
6415 1, strlen(strval) + 1, strval, tx));
6416 spa_history_log_internal(spa, "set", tx,
6417 "%s=%s", nvpair_name(elem), strval);
6418 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) {
6419 intval = fnvpair_value_uint64(elem);
6421 if (proptype == PROP_TYPE_INDEX) {
6423 VERIFY0(zpool_prop_index_to_string(
6424 prop, intval, &unused));
6426 VERIFY0(zap_update(mos,
6427 spa->spa_pool_props_object, propname,
6428 8, 1, &intval, tx));
6429 spa_history_log_internal(spa, "set", tx,
6430 "%s=%lld", nvpair_name(elem), intval);
6432 ASSERT(0); /* not allowed */
6436 case ZPOOL_PROP_DELEGATION:
6437 spa->spa_delegation = intval;
6439 case ZPOOL_PROP_BOOTFS:
6440 spa->spa_bootfs = intval;
6442 case ZPOOL_PROP_FAILUREMODE:
6443 spa->spa_failmode = intval;
6445 case ZPOOL_PROP_AUTOEXPAND:
6446 spa->spa_autoexpand = intval;
6447 if (tx->tx_txg != TXG_INITIAL)
6448 spa_async_request(spa,
6449 SPA_ASYNC_AUTOEXPAND);
6451 case ZPOOL_PROP_DEDUPDITTO:
6452 spa->spa_dedup_ditto = intval;
6461 mutex_exit(&spa->spa_props_lock);
6465 * Perform one-time upgrade on-disk changes. spa_version() does not
6466 * reflect the new version this txg, so there must be no changes this
6467 * txg to anything that the upgrade code depends on after it executes.
6468 * Therefore this must be called after dsl_pool_sync() does the sync
6472 spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx)
6474 dsl_pool_t *dp = spa->spa_dsl_pool;
6476 ASSERT(spa->spa_sync_pass == 1);
6478 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG);
6480 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN &&
6481 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) {
6482 dsl_pool_create_origin(dp, tx);
6484 /* Keeping the origin open increases spa_minref */
6485 spa->spa_minref += 3;
6488 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES &&
6489 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) {
6490 dsl_pool_upgrade_clones(dp, tx);
6493 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES &&
6494 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) {
6495 dsl_pool_upgrade_dir_clones(dp, tx);
6497 /* Keeping the freedir open increases spa_minref */
6498 spa->spa_minref += 3;
6501 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES &&
6502 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) {
6503 spa_feature_create_zap_objects(spa, tx);
6507 * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable
6508 * when possibility to use lz4 compression for metadata was added
6509 * Old pools that have this feature enabled must be upgraded to have
6510 * this feature active
6512 if (spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) {
6513 boolean_t lz4_en = spa_feature_is_enabled(spa,
6514 SPA_FEATURE_LZ4_COMPRESS);
6515 boolean_t lz4_ac = spa_feature_is_active(spa,
6516 SPA_FEATURE_LZ4_COMPRESS);
6518 if (lz4_en && !lz4_ac)
6519 spa_feature_incr(spa, SPA_FEATURE_LZ4_COMPRESS, tx);
6521 rrw_exit(&dp->dp_config_rwlock, FTAG);
6525 * Sync the specified transaction group. New blocks may be dirtied as
6526 * part of the process, so we iterate until it converges.
6529 spa_sync(spa_t *spa, uint64_t txg)
6531 dsl_pool_t *dp = spa->spa_dsl_pool;
6532 objset_t *mos = spa->spa_meta_objset;
6533 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK];
6534 vdev_t *rvd = spa->spa_root_vdev;
6539 VERIFY(spa_writeable(spa));
6542 * Lock out configuration changes.
6544 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
6546 spa->spa_syncing_txg = txg;
6547 spa->spa_sync_pass = 0;
6550 * If there are any pending vdev state changes, convert them
6551 * into config changes that go out with this transaction group.
6553 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
6554 while (list_head(&spa->spa_state_dirty_list) != NULL) {
6556 * We need the write lock here because, for aux vdevs,
6557 * calling vdev_config_dirty() modifies sav_config.
6558 * This is ugly and will become unnecessary when we
6559 * eliminate the aux vdev wart by integrating all vdevs
6560 * into the root vdev tree.
6562 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
6563 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER);
6564 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) {
6565 vdev_state_clean(vd);
6566 vdev_config_dirty(vd);
6568 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
6569 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER);
6571 spa_config_exit(spa, SCL_STATE, FTAG);
6573 tx = dmu_tx_create_assigned(dp, txg);
6575 spa->spa_sync_starttime = gethrtime();
6577 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid,
6578 spa->spa_sync_starttime + spa->spa_deadman_synctime));
6581 callout_reset(&spa->spa_deadman_cycid,
6582 hz * spa->spa_deadman_synctime / NANOSEC, spa_deadman, spa);
6587 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
6588 * set spa_deflate if we have no raid-z vdevs.
6590 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE &&
6591 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) {
6594 for (i = 0; i < rvd->vdev_children; i++) {
6595 vd = rvd->vdev_child[i];
6596 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE)
6599 if (i == rvd->vdev_children) {
6600 spa->spa_deflate = TRUE;
6601 VERIFY(0 == zap_add(spa->spa_meta_objset,
6602 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
6603 sizeof (uint64_t), 1, &spa->spa_deflate, tx));
6608 * If anything has changed in this txg, or if someone is waiting
6609 * for this txg to sync (eg, spa_vdev_remove()), push the
6610 * deferred frees from the previous txg. If not, leave them
6611 * alone so that we don't generate work on an otherwise idle
6614 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) ||
6615 !txg_list_empty(&dp->dp_dirty_dirs, txg) ||
6616 !txg_list_empty(&dp->dp_sync_tasks, txg) ||
6617 ((dsl_scan_active(dp->dp_scan) ||
6618 txg_sync_waiting(dp)) && !spa_shutting_down(spa))) {
6619 spa_sync_deferred_frees(spa, tx);
6623 * Iterate to convergence.
6626 int pass = ++spa->spa_sync_pass;
6628 spa_sync_config_object(spa, tx);
6629 spa_sync_aux_dev(spa, &spa->spa_spares, tx,
6630 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES);
6631 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx,
6632 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE);
6633 spa_errlog_sync(spa, txg);
6634 dsl_pool_sync(dp, txg);
6636 if (pass < zfs_sync_pass_deferred_free) {
6637 spa_sync_frees(spa, free_bpl, tx);
6639 bplist_iterate(free_bpl, bpobj_enqueue_cb,
6640 &spa->spa_deferred_bpobj, tx);
6644 dsl_scan_sync(dp, tx);
6646 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg))
6650 spa_sync_upgrades(spa, tx);
6652 } while (dmu_objset_is_dirty(mos, txg));
6655 * Rewrite the vdev configuration (which includes the uberblock)
6656 * to commit the transaction group.
6658 * If there are no dirty vdevs, we sync the uberblock to a few
6659 * random top-level vdevs that are known to be visible in the
6660 * config cache (see spa_vdev_add() for a complete description).
6661 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
6665 * We hold SCL_STATE to prevent vdev open/close/etc.
6666 * while we're attempting to write the vdev labels.
6668 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
6670 if (list_is_empty(&spa->spa_config_dirty_list)) {
6671 vdev_t *svd[SPA_DVAS_PER_BP];
6673 int children = rvd->vdev_children;
6674 int c0 = spa_get_random(children);
6676 for (int c = 0; c < children; c++) {
6677 vd = rvd->vdev_child[(c0 + c) % children];
6678 if (vd->vdev_ms_array == 0 || vd->vdev_islog)
6680 svd[svdcount++] = vd;
6681 if (svdcount == SPA_DVAS_PER_BP)
6684 error = vdev_config_sync(svd, svdcount, txg, B_FALSE);
6686 error = vdev_config_sync(svd, svdcount, txg,
6689 error = vdev_config_sync(rvd->vdev_child,
6690 rvd->vdev_children, txg, B_FALSE);
6692 error = vdev_config_sync(rvd->vdev_child,
6693 rvd->vdev_children, txg, B_TRUE);
6697 spa->spa_last_synced_guid = rvd->vdev_guid;
6699 spa_config_exit(spa, SCL_STATE, FTAG);
6703 zio_suspend(spa, NULL);
6704 zio_resume_wait(spa);
6709 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY));
6712 callout_drain(&spa->spa_deadman_cycid);
6717 * Clear the dirty config list.
6719 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL)
6720 vdev_config_clean(vd);
6723 * Now that the new config has synced transactionally,
6724 * let it become visible to the config cache.
6726 if (spa->spa_config_syncing != NULL) {
6727 spa_config_set(spa, spa->spa_config_syncing);
6728 spa->spa_config_txg = txg;
6729 spa->spa_config_syncing = NULL;
6732 spa->spa_ubsync = spa->spa_uberblock;
6734 dsl_pool_sync_done(dp, txg);
6737 * Update usable space statistics.
6739 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg)))
6740 vdev_sync_done(vd, txg);
6742 spa_update_dspace(spa);
6745 * It had better be the case that we didn't dirty anything
6746 * since vdev_config_sync().
6748 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg));
6749 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg));
6750 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg));
6752 spa->spa_sync_pass = 0;
6754 spa_config_exit(spa, SCL_CONFIG, FTAG);
6756 spa_handle_ignored_writes(spa);
6759 * If any async tasks have been requested, kick them off.
6761 spa_async_dispatch(spa);
6762 spa_async_dispatch_vd(spa);
6766 * Sync all pools. We don't want to hold the namespace lock across these
6767 * operations, so we take a reference on the spa_t and drop the lock during the
6771 spa_sync_allpools(void)
6774 mutex_enter(&spa_namespace_lock);
6775 while ((spa = spa_next(spa)) != NULL) {
6776 if (spa_state(spa) != POOL_STATE_ACTIVE ||
6777 !spa_writeable(spa) || spa_suspended(spa))
6779 spa_open_ref(spa, FTAG);
6780 mutex_exit(&spa_namespace_lock);
6781 txg_wait_synced(spa_get_dsl(spa), 0);
6782 mutex_enter(&spa_namespace_lock);
6783 spa_close(spa, FTAG);
6785 mutex_exit(&spa_namespace_lock);
6789 * ==========================================================================
6790 * Miscellaneous routines
6791 * ==========================================================================
6795 * Remove all pools in the system.
6803 * Remove all cached state. All pools should be closed now,
6804 * so every spa in the AVL tree should be unreferenced.
6806 mutex_enter(&spa_namespace_lock);
6807 while ((spa = spa_next(NULL)) != NULL) {
6809 * Stop async tasks. The async thread may need to detach
6810 * a device that's been replaced, which requires grabbing
6811 * spa_namespace_lock, so we must drop it here.
6813 spa_open_ref(spa, FTAG);
6814 mutex_exit(&spa_namespace_lock);
6815 spa_async_suspend(spa);
6816 mutex_enter(&spa_namespace_lock);
6817 spa_close(spa, FTAG);
6819 if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
6821 spa_deactivate(spa);
6825 mutex_exit(&spa_namespace_lock);
6829 spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux)
6834 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL)
6838 for (i = 0; i < spa->spa_l2cache.sav_count; i++) {
6839 vd = spa->spa_l2cache.sav_vdevs[i];
6840 if (vd->vdev_guid == guid)
6844 for (i = 0; i < spa->spa_spares.sav_count; i++) {
6845 vd = spa->spa_spares.sav_vdevs[i];
6846 if (vd->vdev_guid == guid)
6855 spa_upgrade(spa_t *spa, uint64_t version)
6857 ASSERT(spa_writeable(spa));
6859 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
6862 * This should only be called for a non-faulted pool, and since a
6863 * future version would result in an unopenable pool, this shouldn't be
6866 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version));
6867 ASSERT3U(version, >=, spa->spa_uberblock.ub_version);
6869 spa->spa_uberblock.ub_version = version;
6870 vdev_config_dirty(spa->spa_root_vdev);
6872 spa_config_exit(spa, SCL_ALL, FTAG);
6874 txg_wait_synced(spa_get_dsl(spa), 0);
6878 spa_has_spare(spa_t *spa, uint64_t guid)
6882 spa_aux_vdev_t *sav = &spa->spa_spares;
6884 for (i = 0; i < sav->sav_count; i++)
6885 if (sav->sav_vdevs[i]->vdev_guid == guid)
6888 for (i = 0; i < sav->sav_npending; i++) {
6889 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID,
6890 &spareguid) == 0 && spareguid == guid)
6898 * Check if a pool has an active shared spare device.
6899 * Note: reference count of an active spare is 2, as a spare and as a replace
6902 spa_has_active_shared_spare(spa_t *spa)
6906 spa_aux_vdev_t *sav = &spa->spa_spares;
6908 for (i = 0; i < sav->sav_count; i++) {
6909 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool,
6910 &refcnt) && pool != 0ULL && pool == spa_guid(spa) &&
6919 * Post a sysevent corresponding to the given event. The 'name' must be one of
6920 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
6921 * filled in from the spa and (optionally) the vdev. This doesn't do anything
6922 * in the userland libzpool, as we don't want consumers to misinterpret ztest
6923 * or zdb as real changes.
6926 spa_event_notify(spa_t *spa, vdev_t *vd, const char *name)
6930 sysevent_attr_list_t *attr = NULL;
6931 sysevent_value_t value;
6934 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs",
6937 value.value_type = SE_DATA_TYPE_STRING;
6938 value.value.sv_string = spa_name(spa);
6939 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0)
6942 value.value_type = SE_DATA_TYPE_UINT64;
6943 value.value.sv_uint64 = spa_guid(spa);
6944 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0)
6948 value.value_type = SE_DATA_TYPE_UINT64;
6949 value.value.sv_uint64 = vd->vdev_guid;
6950 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value,
6954 if (vd->vdev_path) {
6955 value.value_type = SE_DATA_TYPE_STRING;
6956 value.value.sv_string = vd->vdev_path;
6957 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH,
6958 &value, SE_SLEEP) != 0)
6963 if (sysevent_attach_attributes(ev, attr) != 0)
6967 (void) log_sysevent(ev, SE_SLEEP, &eid);
6971 sysevent_free_attr(attr);