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) 2011, 2014 by Delphix. All rights reserved.
25 * Copyright (c) 2015, Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
27 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
28 * Copyright 2013 Saso Kiselkov. All rights reserved.
29 * Copyright (c) 2014 Integros [integros.com]
33 * SPA: Storage Pool Allocator
35 * This file contains all the routines used when modifying on-disk SPA state.
36 * This includes opening, importing, destroying, exporting a pool, and syncing a
40 #include <sys/zfs_context.h>
41 #include <sys/fm/fs/zfs.h>
42 #include <sys/spa_impl.h>
44 #include <sys/zio_checksum.h>
46 #include <sys/dmu_tx.h>
50 #include <sys/vdev_impl.h>
51 #include <sys/metaslab.h>
52 #include <sys/metaslab_impl.h>
53 #include <sys/uberblock_impl.h>
56 #include <sys/dmu_traverse.h>
57 #include <sys/dmu_objset.h>
58 #include <sys/unique.h>
59 #include <sys/dsl_pool.h>
60 #include <sys/dsl_dataset.h>
61 #include <sys/dsl_dir.h>
62 #include <sys/dsl_prop.h>
63 #include <sys/dsl_synctask.h>
64 #include <sys/fs/zfs.h>
66 #include <sys/callb.h>
67 #include <sys/spa_boot.h>
68 #include <sys/zfs_ioctl.h>
69 #include <sys/dsl_scan.h>
70 #include <sys/dmu_send.h>
71 #include <sys/dsl_destroy.h>
72 #include <sys/dsl_userhold.h>
73 #include <sys/zfeature.h>
75 #include <sys/trim_map.h>
78 #include <sys/callb.h>
79 #include <sys/cpupart.h>
84 #include "zfs_comutil.h"
86 /* Check hostid on import? */
87 static int check_hostid = 1;
90 * The interval, in seconds, at which failed configuration cache file writes
93 static int zfs_ccw_retry_interval = 300;
95 SYSCTL_DECL(_vfs_zfs);
96 TUNABLE_INT("vfs.zfs.check_hostid", &check_hostid);
97 SYSCTL_INT(_vfs_zfs, OID_AUTO, check_hostid, CTLFLAG_RWTUN, &check_hostid, 0,
98 "Check hostid on import?");
99 TUNABLE_INT("vfs.zfs.ccw_retry_interval", &zfs_ccw_retry_interval);
100 SYSCTL_INT(_vfs_zfs, OID_AUTO, ccw_retry_interval, CTLFLAG_RW,
101 &zfs_ccw_retry_interval, 0,
102 "Configuration cache file write, retry after failure, interval (seconds)");
104 typedef enum zti_modes {
105 ZTI_MODE_FIXED, /* value is # of threads (min 1) */
106 ZTI_MODE_BATCH, /* cpu-intensive; value is ignored */
107 ZTI_MODE_NULL, /* don't create a taskq */
111 #define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) }
112 #define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 }
113 #define ZTI_NULL { ZTI_MODE_NULL, 0, 0 }
115 #define ZTI_N(n) ZTI_P(n, 1)
116 #define ZTI_ONE ZTI_N(1)
118 typedef struct zio_taskq_info {
119 zti_modes_t zti_mode;
124 static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = {
125 "issue", "issue_high", "intr", "intr_high"
129 * This table defines the taskq settings for each ZFS I/O type. When
130 * initializing a pool, we use this table to create an appropriately sized
131 * taskq. Some operations are low volume and therefore have a small, static
132 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE
133 * macros. Other operations process a large amount of data; the ZTI_BATCH
134 * macro causes us to create a taskq oriented for throughput. Some operations
135 * are so high frequency and short-lived that the taskq itself can become a a
136 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an
137 * additional degree of parallelism specified by the number of threads per-
138 * taskq and the number of taskqs; when dispatching an event in this case, the
139 * particular taskq is chosen at random.
141 * The different taskq priorities are to handle the different contexts (issue
142 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that
143 * need to be handled with minimum delay.
145 const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = {
146 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */
147 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* NULL */
148 { ZTI_N(8), ZTI_NULL, ZTI_P(12, 8), ZTI_NULL }, /* READ */
149 { ZTI_BATCH, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */
150 { ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */
151 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */
152 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */
155 static sysevent_t *spa_event_create(spa_t *spa, vdev_t *vd, const char *name);
156 static void spa_event_post(sysevent_t *ev);
157 static void spa_sync_version(void *arg, dmu_tx_t *tx);
158 static void spa_sync_props(void *arg, dmu_tx_t *tx);
159 static boolean_t spa_has_active_shared_spare(spa_t *spa);
160 static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config,
161 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig,
163 static void spa_vdev_resilver_done(spa_t *spa);
165 uint_t zio_taskq_batch_pct = 75; /* 1 thread per cpu in pset */
167 id_t zio_taskq_psrset_bind = PS_NONE;
170 boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */
171 uint_t zio_taskq_basedc = 80; /* base duty cycle */
174 boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */
175 extern int zfs_sync_pass_deferred_free;
178 * This (illegal) pool name is used when temporarily importing a spa_t in order
179 * to get the vdev stats associated with the imported devices.
181 #define TRYIMPORT_NAME "$import"
184 * ==========================================================================
185 * SPA properties routines
186 * ==========================================================================
190 * Add a (source=src, propname=propval) list to an nvlist.
193 spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval,
194 uint64_t intval, zprop_source_t src)
196 const char *propname = zpool_prop_to_name(prop);
199 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0);
200 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0);
203 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0);
205 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0);
207 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0);
208 nvlist_free(propval);
212 * Get property values from the spa configuration.
215 spa_prop_get_config(spa_t *spa, nvlist_t **nvp)
217 vdev_t *rvd = spa->spa_root_vdev;
218 dsl_pool_t *pool = spa->spa_dsl_pool;
219 uint64_t size, alloc, cap, version;
220 zprop_source_t src = ZPROP_SRC_NONE;
221 spa_config_dirent_t *dp;
222 metaslab_class_t *mc = spa_normal_class(spa);
224 ASSERT(MUTEX_HELD(&spa->spa_props_lock));
227 alloc = metaslab_class_get_alloc(spa_normal_class(spa));
228 size = metaslab_class_get_space(spa_normal_class(spa));
229 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src);
230 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src);
231 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src);
232 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL,
235 spa_prop_add_list(*nvp, ZPOOL_PROP_FRAGMENTATION, NULL,
236 metaslab_class_fragmentation(mc), src);
237 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL,
238 metaslab_class_expandable_space(mc), src);
239 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL,
240 (spa_mode(spa) == FREAD), src);
242 cap = (size == 0) ? 0 : (alloc * 100 / size);
243 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src);
245 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL,
246 ddt_get_pool_dedup_ratio(spa), src);
248 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL,
249 rvd->vdev_state, src);
251 version = spa_version(spa);
252 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION))
253 src = ZPROP_SRC_DEFAULT;
255 src = ZPROP_SRC_LOCAL;
256 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src);
261 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS,
262 * when opening pools before this version freedir will be NULL.
264 if (pool->dp_free_dir != NULL) {
265 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL,
266 dsl_dir_phys(pool->dp_free_dir)->dd_used_bytes,
269 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING,
273 if (pool->dp_leak_dir != NULL) {
274 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, NULL,
275 dsl_dir_phys(pool->dp_leak_dir)->dd_used_bytes,
278 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED,
283 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src);
285 if (spa->spa_comment != NULL) {
286 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment,
290 if (spa->spa_root != NULL)
291 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root,
294 if (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_BLOCKS)) {
295 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL,
296 MIN(zfs_max_recordsize, SPA_MAXBLOCKSIZE), ZPROP_SRC_NONE);
298 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL,
299 SPA_OLD_MAXBLOCKSIZE, ZPROP_SRC_NONE);
302 if ((dp = list_head(&spa->spa_config_list)) != NULL) {
303 if (dp->scd_path == NULL) {
304 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
305 "none", 0, ZPROP_SRC_LOCAL);
306 } else if (strcmp(dp->scd_path, spa_config_path) != 0) {
307 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE,
308 dp->scd_path, 0, ZPROP_SRC_LOCAL);
314 * Get zpool property values.
317 spa_prop_get(spa_t *spa, nvlist_t **nvp)
319 objset_t *mos = spa->spa_meta_objset;
324 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0);
326 mutex_enter(&spa->spa_props_lock);
329 * Get properties from the spa config.
331 spa_prop_get_config(spa, nvp);
333 /* If no pool property object, no more prop to get. */
334 if (mos == NULL || spa->spa_pool_props_object == 0) {
335 mutex_exit(&spa->spa_props_lock);
340 * Get properties from the MOS pool property object.
342 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object);
343 (err = zap_cursor_retrieve(&zc, &za)) == 0;
344 zap_cursor_advance(&zc)) {
347 zprop_source_t src = ZPROP_SRC_DEFAULT;
350 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL)
353 switch (za.za_integer_length) {
355 /* integer property */
356 if (za.za_first_integer !=
357 zpool_prop_default_numeric(prop))
358 src = ZPROP_SRC_LOCAL;
360 if (prop == ZPOOL_PROP_BOOTFS) {
362 dsl_dataset_t *ds = NULL;
364 dp = spa_get_dsl(spa);
365 dsl_pool_config_enter(dp, FTAG);
366 if (err = dsl_dataset_hold_obj(dp,
367 za.za_first_integer, FTAG, &ds)) {
368 dsl_pool_config_exit(dp, FTAG);
372 strval = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN,
374 dsl_dataset_name(ds, strval);
375 dsl_dataset_rele(ds, FTAG);
376 dsl_pool_config_exit(dp, FTAG);
379 intval = za.za_first_integer;
382 spa_prop_add_list(*nvp, prop, strval, intval, src);
385 kmem_free(strval, ZFS_MAX_DATASET_NAME_LEN);
390 /* string property */
391 strval = kmem_alloc(za.za_num_integers, KM_SLEEP);
392 err = zap_lookup(mos, spa->spa_pool_props_object,
393 za.za_name, 1, za.za_num_integers, strval);
395 kmem_free(strval, za.za_num_integers);
398 spa_prop_add_list(*nvp, prop, strval, 0, src);
399 kmem_free(strval, za.za_num_integers);
406 zap_cursor_fini(&zc);
407 mutex_exit(&spa->spa_props_lock);
409 if (err && err != ENOENT) {
419 * Validate the given pool properties nvlist and modify the list
420 * for the property values to be set.
423 spa_prop_validate(spa_t *spa, nvlist_t *props)
426 int error = 0, reset_bootfs = 0;
428 boolean_t has_feature = B_FALSE;
431 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
433 char *strval, *slash, *check, *fname;
434 const char *propname = nvpair_name(elem);
435 zpool_prop_t prop = zpool_name_to_prop(propname);
439 if (!zpool_prop_feature(propname)) {
440 error = SET_ERROR(EINVAL);
445 * Sanitize the input.
447 if (nvpair_type(elem) != DATA_TYPE_UINT64) {
448 error = SET_ERROR(EINVAL);
452 if (nvpair_value_uint64(elem, &intval) != 0) {
453 error = SET_ERROR(EINVAL);
458 error = SET_ERROR(EINVAL);
462 fname = strchr(propname, '@') + 1;
463 if (zfeature_lookup_name(fname, NULL) != 0) {
464 error = SET_ERROR(EINVAL);
468 has_feature = B_TRUE;
471 case ZPOOL_PROP_VERSION:
472 error = nvpair_value_uint64(elem, &intval);
474 (intval < spa_version(spa) ||
475 intval > SPA_VERSION_BEFORE_FEATURES ||
477 error = SET_ERROR(EINVAL);
480 case ZPOOL_PROP_DELEGATION:
481 case ZPOOL_PROP_AUTOREPLACE:
482 case ZPOOL_PROP_LISTSNAPS:
483 case ZPOOL_PROP_AUTOEXPAND:
484 error = nvpair_value_uint64(elem, &intval);
485 if (!error && intval > 1)
486 error = SET_ERROR(EINVAL);
489 case ZPOOL_PROP_BOOTFS:
491 * If the pool version is less than SPA_VERSION_BOOTFS,
492 * or the pool is still being created (version == 0),
493 * the bootfs property cannot be set.
495 if (spa_version(spa) < SPA_VERSION_BOOTFS) {
496 error = SET_ERROR(ENOTSUP);
501 * Make sure the vdev config is bootable
503 if (!vdev_is_bootable(spa->spa_root_vdev)) {
504 error = SET_ERROR(ENOTSUP);
510 error = nvpair_value_string(elem, &strval);
516 if (strval == NULL || strval[0] == '\0') {
517 objnum = zpool_prop_default_numeric(
522 if (error = dmu_objset_hold(strval, FTAG, &os))
526 * Must be ZPL, and its property settings
527 * must be supported by GRUB (compression
528 * is not gzip, and large blocks are not used).
531 if (dmu_objset_type(os) != DMU_OST_ZFS) {
532 error = SET_ERROR(ENOTSUP);
534 dsl_prop_get_int_ds(dmu_objset_ds(os),
535 zfs_prop_to_name(ZFS_PROP_COMPRESSION),
537 !BOOTFS_COMPRESS_VALID(propval)) {
538 error = SET_ERROR(ENOTSUP);
540 dsl_prop_get_int_ds(dmu_objset_ds(os),
541 zfs_prop_to_name(ZFS_PROP_RECORDSIZE),
543 propval > SPA_OLD_MAXBLOCKSIZE) {
544 error = SET_ERROR(ENOTSUP);
546 objnum = dmu_objset_id(os);
548 dmu_objset_rele(os, FTAG);
552 case ZPOOL_PROP_FAILUREMODE:
553 error = nvpair_value_uint64(elem, &intval);
554 if (!error && (intval < ZIO_FAILURE_MODE_WAIT ||
555 intval > ZIO_FAILURE_MODE_PANIC))
556 error = SET_ERROR(EINVAL);
559 * This is a special case which only occurs when
560 * the pool has completely failed. This allows
561 * the user to change the in-core failmode property
562 * without syncing it out to disk (I/Os might
563 * currently be blocked). We do this by returning
564 * EIO to the caller (spa_prop_set) to trick it
565 * into thinking we encountered a property validation
568 if (!error && spa_suspended(spa)) {
569 spa->spa_failmode = intval;
570 error = SET_ERROR(EIO);
574 case ZPOOL_PROP_CACHEFILE:
575 if ((error = nvpair_value_string(elem, &strval)) != 0)
578 if (strval[0] == '\0')
581 if (strcmp(strval, "none") == 0)
584 if (strval[0] != '/') {
585 error = SET_ERROR(EINVAL);
589 slash = strrchr(strval, '/');
590 ASSERT(slash != NULL);
592 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 ||
593 strcmp(slash, "/..") == 0)
594 error = SET_ERROR(EINVAL);
597 case ZPOOL_PROP_COMMENT:
598 if ((error = nvpair_value_string(elem, &strval)) != 0)
600 for (check = strval; *check != '\0'; check++) {
602 * The kernel doesn't have an easy isprint()
603 * check. For this kernel check, we merely
604 * check ASCII apart from DEL. Fix this if
605 * there is an easy-to-use kernel isprint().
607 if (*check >= 0x7f) {
608 error = SET_ERROR(EINVAL);
612 if (strlen(strval) > ZPROP_MAX_COMMENT)
616 case ZPOOL_PROP_DEDUPDITTO:
617 if (spa_version(spa) < SPA_VERSION_DEDUP)
618 error = SET_ERROR(ENOTSUP);
620 error = nvpair_value_uint64(elem, &intval);
622 intval != 0 && intval < ZIO_DEDUPDITTO_MIN)
623 error = SET_ERROR(EINVAL);
631 if (!error && reset_bootfs) {
632 error = nvlist_remove(props,
633 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING);
636 error = nvlist_add_uint64(props,
637 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum);
645 spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync)
648 spa_config_dirent_t *dp;
650 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE),
654 dp = kmem_alloc(sizeof (spa_config_dirent_t),
657 if (cachefile[0] == '\0')
658 dp->scd_path = spa_strdup(spa_config_path);
659 else if (strcmp(cachefile, "none") == 0)
662 dp->scd_path = spa_strdup(cachefile);
664 list_insert_head(&spa->spa_config_list, dp);
666 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
670 spa_prop_set(spa_t *spa, nvlist_t *nvp)
673 nvpair_t *elem = NULL;
674 boolean_t need_sync = B_FALSE;
676 if ((error = spa_prop_validate(spa, nvp)) != 0)
679 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) {
680 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem));
682 if (prop == ZPOOL_PROP_CACHEFILE ||
683 prop == ZPOOL_PROP_ALTROOT ||
684 prop == ZPOOL_PROP_READONLY)
687 if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) {
690 if (prop == ZPOOL_PROP_VERSION) {
691 VERIFY(nvpair_value_uint64(elem, &ver) == 0);
693 ASSERT(zpool_prop_feature(nvpair_name(elem)));
694 ver = SPA_VERSION_FEATURES;
698 /* Save time if the version is already set. */
699 if (ver == spa_version(spa))
703 * In addition to the pool directory object, we might
704 * create the pool properties object, the features for
705 * read object, the features for write object, or the
706 * feature descriptions object.
708 error = dsl_sync_task(spa->spa_name, NULL,
709 spa_sync_version, &ver,
710 6, ZFS_SPACE_CHECK_RESERVED);
721 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props,
722 nvp, 6, ZFS_SPACE_CHECK_RESERVED));
729 * If the bootfs property value is dsobj, clear it.
732 spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx)
734 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) {
735 VERIFY(zap_remove(spa->spa_meta_objset,
736 spa->spa_pool_props_object,
737 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0);
744 spa_change_guid_check(void *arg, dmu_tx_t *tx)
746 uint64_t *newguid = arg;
747 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
748 vdev_t *rvd = spa->spa_root_vdev;
751 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
752 vdev_state = rvd->vdev_state;
753 spa_config_exit(spa, SCL_STATE, FTAG);
755 if (vdev_state != VDEV_STATE_HEALTHY)
756 return (SET_ERROR(ENXIO));
758 ASSERT3U(spa_guid(spa), !=, *newguid);
764 spa_change_guid_sync(void *arg, dmu_tx_t *tx)
766 uint64_t *newguid = arg;
767 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
769 vdev_t *rvd = spa->spa_root_vdev;
771 oldguid = spa_guid(spa);
773 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
774 rvd->vdev_guid = *newguid;
775 rvd->vdev_guid_sum += (*newguid - oldguid);
776 vdev_config_dirty(rvd);
777 spa_config_exit(spa, SCL_STATE, FTAG);
779 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu",
784 * Change the GUID for the pool. This is done so that we can later
785 * re-import a pool built from a clone of our own vdevs. We will modify
786 * the root vdev's guid, our own pool guid, and then mark all of our
787 * vdevs dirty. Note that we must make sure that all our vdevs are
788 * online when we do this, or else any vdevs that weren't present
789 * would be orphaned from our pool. We are also going to issue a
790 * sysevent to update any watchers.
793 spa_change_guid(spa_t *spa)
798 mutex_enter(&spa->spa_vdev_top_lock);
799 mutex_enter(&spa_namespace_lock);
800 guid = spa_generate_guid(NULL);
802 error = dsl_sync_task(spa->spa_name, spa_change_guid_check,
803 spa_change_guid_sync, &guid, 5, ZFS_SPACE_CHECK_RESERVED);
806 spa_config_sync(spa, B_FALSE, B_TRUE);
807 spa_event_notify(spa, NULL, ESC_ZFS_POOL_REGUID);
810 mutex_exit(&spa_namespace_lock);
811 mutex_exit(&spa->spa_vdev_top_lock);
817 * ==========================================================================
818 * SPA state manipulation (open/create/destroy/import/export)
819 * ==========================================================================
823 spa_error_entry_compare(const void *a, const void *b)
825 spa_error_entry_t *sa = (spa_error_entry_t *)a;
826 spa_error_entry_t *sb = (spa_error_entry_t *)b;
829 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark,
830 sizeof (zbookmark_phys_t));
841 * Utility function which retrieves copies of the current logs and
842 * re-initializes them in the process.
845 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub)
847 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock));
849 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t));
850 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t));
852 avl_create(&spa->spa_errlist_scrub,
853 spa_error_entry_compare, sizeof (spa_error_entry_t),
854 offsetof(spa_error_entry_t, se_avl));
855 avl_create(&spa->spa_errlist_last,
856 spa_error_entry_compare, sizeof (spa_error_entry_t),
857 offsetof(spa_error_entry_t, se_avl));
861 spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q)
863 const zio_taskq_info_t *ztip = &zio_taskqs[t][q];
864 enum zti_modes mode = ztip->zti_mode;
865 uint_t value = ztip->zti_value;
866 uint_t count = ztip->zti_count;
867 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q];
870 boolean_t batch = B_FALSE;
872 if (mode == ZTI_MODE_NULL) {
874 tqs->stqs_taskq = NULL;
878 ASSERT3U(count, >, 0);
880 tqs->stqs_count = count;
881 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP);
885 ASSERT3U(value, >=, 1);
886 value = MAX(value, 1);
891 flags |= TASKQ_THREADS_CPU_PCT;
892 value = zio_taskq_batch_pct;
896 panic("unrecognized mode for %s_%s taskq (%u:%u) in "
898 zio_type_name[t], zio_taskq_types[q], mode, value);
902 for (uint_t i = 0; i < count; i++) {
906 (void) snprintf(name, sizeof (name), "%s_%s_%u",
907 zio_type_name[t], zio_taskq_types[q], i);
909 (void) snprintf(name, sizeof (name), "%s_%s",
910 zio_type_name[t], zio_taskq_types[q]);
914 if (zio_taskq_sysdc && spa->spa_proc != &p0) {
916 flags |= TASKQ_DC_BATCH;
918 tq = taskq_create_sysdc(name, value, 50, INT_MAX,
919 spa->spa_proc, zio_taskq_basedc, flags);
922 pri_t pri = maxclsyspri;
924 * The write issue taskq can be extremely CPU
925 * intensive. Run it at slightly lower priority
926 * than the other taskqs.
928 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE)
931 tq = taskq_create_proc(name, value, pri, 50,
932 INT_MAX, spa->spa_proc, flags);
937 tqs->stqs_taskq[i] = tq;
942 spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q)
944 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q];
946 if (tqs->stqs_taskq == NULL) {
947 ASSERT0(tqs->stqs_count);
951 for (uint_t i = 0; i < tqs->stqs_count; i++) {
952 ASSERT3P(tqs->stqs_taskq[i], !=, NULL);
953 taskq_destroy(tqs->stqs_taskq[i]);
956 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *));
957 tqs->stqs_taskq = NULL;
961 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority.
962 * Note that a type may have multiple discrete taskqs to avoid lock contention
963 * on the taskq itself. In that case we choose which taskq at random by using
964 * the low bits of gethrtime().
967 spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
968 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent)
970 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q];
973 ASSERT3P(tqs->stqs_taskq, !=, NULL);
974 ASSERT3U(tqs->stqs_count, !=, 0);
976 if (tqs->stqs_count == 1) {
977 tq = tqs->stqs_taskq[0];
980 tq = tqs->stqs_taskq[cpu_ticks() % tqs->stqs_count];
982 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count];
986 taskq_dispatch_ent(tq, func, arg, flags, ent);
990 spa_create_zio_taskqs(spa_t *spa)
992 for (int t = 0; t < ZIO_TYPES; t++) {
993 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) {
994 spa_taskqs_init(spa, t, q);
1002 spa_thread(void *arg)
1004 callb_cpr_t cprinfo;
1007 user_t *pu = PTOU(curproc);
1009 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr,
1012 ASSERT(curproc != &p0);
1013 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs),
1014 "zpool-%s", spa->spa_name);
1015 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm));
1018 /* bind this thread to the requested psrset */
1019 if (zio_taskq_psrset_bind != PS_NONE) {
1021 mutex_enter(&cpu_lock);
1022 mutex_enter(&pidlock);
1023 mutex_enter(&curproc->p_lock);
1025 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind,
1026 0, NULL, NULL) == 0) {
1027 curthread->t_bind_pset = zio_taskq_psrset_bind;
1030 "Couldn't bind process for zfs pool \"%s\" to "
1031 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind);
1034 mutex_exit(&curproc->p_lock);
1035 mutex_exit(&pidlock);
1036 mutex_exit(&cpu_lock);
1042 if (zio_taskq_sysdc) {
1043 sysdc_thread_enter(curthread, 100, 0);
1047 spa->spa_proc = curproc;
1048 spa->spa_did = curthread->t_did;
1050 spa_create_zio_taskqs(spa);
1052 mutex_enter(&spa->spa_proc_lock);
1053 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED);
1055 spa->spa_proc_state = SPA_PROC_ACTIVE;
1056 cv_broadcast(&spa->spa_proc_cv);
1058 CALLB_CPR_SAFE_BEGIN(&cprinfo);
1059 while (spa->spa_proc_state == SPA_PROC_ACTIVE)
1060 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock);
1061 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock);
1063 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE);
1064 spa->spa_proc_state = SPA_PROC_GONE;
1065 spa->spa_proc = &p0;
1066 cv_broadcast(&spa->spa_proc_cv);
1067 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */
1069 mutex_enter(&curproc->p_lock);
1072 #endif /* SPA_PROCESS */
1076 * Activate an uninitialized pool.
1079 spa_activate(spa_t *spa, int mode)
1081 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED);
1083 spa->spa_state = POOL_STATE_ACTIVE;
1084 spa->spa_mode = mode;
1086 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops);
1087 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops);
1089 /* Try to create a covering process */
1090 mutex_enter(&spa->spa_proc_lock);
1091 ASSERT(spa->spa_proc_state == SPA_PROC_NONE);
1092 ASSERT(spa->spa_proc == &p0);
1096 /* Only create a process if we're going to be around a while. */
1097 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) {
1098 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri,
1100 spa->spa_proc_state = SPA_PROC_CREATED;
1101 while (spa->spa_proc_state == SPA_PROC_CREATED) {
1102 cv_wait(&spa->spa_proc_cv,
1103 &spa->spa_proc_lock);
1105 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE);
1106 ASSERT(spa->spa_proc != &p0);
1107 ASSERT(spa->spa_did != 0);
1111 "Couldn't create process for zfs pool \"%s\"\n",
1116 #endif /* SPA_PROCESS */
1117 mutex_exit(&spa->spa_proc_lock);
1119 /* If we didn't create a process, we need to create our taskqs. */
1120 ASSERT(spa->spa_proc == &p0);
1121 if (spa->spa_proc == &p0) {
1122 spa_create_zio_taskqs(spa);
1126 * Start TRIM thread.
1128 trim_thread_create(spa);
1130 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t),
1131 offsetof(vdev_t, vdev_config_dirty_node));
1132 list_create(&spa->spa_evicting_os_list, sizeof (objset_t),
1133 offsetof(objset_t, os_evicting_node));
1134 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t),
1135 offsetof(vdev_t, vdev_state_dirty_node));
1137 txg_list_create(&spa->spa_vdev_txg_list,
1138 offsetof(struct vdev, vdev_txg_node));
1140 avl_create(&spa->spa_errlist_scrub,
1141 spa_error_entry_compare, sizeof (spa_error_entry_t),
1142 offsetof(spa_error_entry_t, se_avl));
1143 avl_create(&spa->spa_errlist_last,
1144 spa_error_entry_compare, sizeof (spa_error_entry_t),
1145 offsetof(spa_error_entry_t, se_avl));
1149 * Opposite of spa_activate().
1152 spa_deactivate(spa_t *spa)
1154 ASSERT(spa->spa_sync_on == B_FALSE);
1155 ASSERT(spa->spa_dsl_pool == NULL);
1156 ASSERT(spa->spa_root_vdev == NULL);
1157 ASSERT(spa->spa_async_zio_root == NULL);
1158 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED);
1161 * Stop TRIM thread in case spa_unload() wasn't called directly
1162 * before spa_deactivate().
1164 trim_thread_destroy(spa);
1166 spa_evicting_os_wait(spa);
1168 txg_list_destroy(&spa->spa_vdev_txg_list);
1170 list_destroy(&spa->spa_config_dirty_list);
1171 list_destroy(&spa->spa_evicting_os_list);
1172 list_destroy(&spa->spa_state_dirty_list);
1174 for (int t = 0; t < ZIO_TYPES; t++) {
1175 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) {
1176 spa_taskqs_fini(spa, t, q);
1180 metaslab_class_destroy(spa->spa_normal_class);
1181 spa->spa_normal_class = NULL;
1183 metaslab_class_destroy(spa->spa_log_class);
1184 spa->spa_log_class = NULL;
1187 * If this was part of an import or the open otherwise failed, we may
1188 * still have errors left in the queues. Empty them just in case.
1190 spa_errlog_drain(spa);
1192 avl_destroy(&spa->spa_errlist_scrub);
1193 avl_destroy(&spa->spa_errlist_last);
1195 spa->spa_state = POOL_STATE_UNINITIALIZED;
1197 mutex_enter(&spa->spa_proc_lock);
1198 if (spa->spa_proc_state != SPA_PROC_NONE) {
1199 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE);
1200 spa->spa_proc_state = SPA_PROC_DEACTIVATE;
1201 cv_broadcast(&spa->spa_proc_cv);
1202 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) {
1203 ASSERT(spa->spa_proc != &p0);
1204 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock);
1206 ASSERT(spa->spa_proc_state == SPA_PROC_GONE);
1207 spa->spa_proc_state = SPA_PROC_NONE;
1209 ASSERT(spa->spa_proc == &p0);
1210 mutex_exit(&spa->spa_proc_lock);
1214 * We want to make sure spa_thread() has actually exited the ZFS
1215 * module, so that the module can't be unloaded out from underneath
1218 if (spa->spa_did != 0) {
1219 thread_join(spa->spa_did);
1222 #endif /* SPA_PROCESS */
1226 * Verify a pool configuration, and construct the vdev tree appropriately. This
1227 * will create all the necessary vdevs in the appropriate layout, with each vdev
1228 * in the CLOSED state. This will prep the pool before open/creation/import.
1229 * All vdev validation is done by the vdev_alloc() routine.
1232 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent,
1233 uint_t id, int atype)
1239 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0)
1242 if ((*vdp)->vdev_ops->vdev_op_leaf)
1245 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
1248 if (error == ENOENT)
1254 return (SET_ERROR(EINVAL));
1257 for (int c = 0; c < children; c++) {
1259 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c,
1267 ASSERT(*vdp != NULL);
1273 * Opposite of spa_load().
1276 spa_unload(spa_t *spa)
1280 ASSERT(MUTEX_HELD(&spa_namespace_lock));
1285 trim_thread_destroy(spa);
1290 spa_async_suspend(spa);
1295 if (spa->spa_sync_on) {
1296 txg_sync_stop(spa->spa_dsl_pool);
1297 spa->spa_sync_on = B_FALSE;
1301 * Wait for any outstanding async I/O to complete.
1303 if (spa->spa_async_zio_root != NULL) {
1304 for (int i = 0; i < max_ncpus; i++)
1305 (void) zio_wait(spa->spa_async_zio_root[i]);
1306 kmem_free(spa->spa_async_zio_root, max_ncpus * sizeof (void *));
1307 spa->spa_async_zio_root = NULL;
1310 bpobj_close(&spa->spa_deferred_bpobj);
1312 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1317 if (spa->spa_root_vdev)
1318 vdev_free(spa->spa_root_vdev);
1319 ASSERT(spa->spa_root_vdev == NULL);
1322 * Close the dsl pool.
1324 if (spa->spa_dsl_pool) {
1325 dsl_pool_close(spa->spa_dsl_pool);
1326 spa->spa_dsl_pool = NULL;
1327 spa->spa_meta_objset = NULL;
1333 * Drop and purge level 2 cache
1335 spa_l2cache_drop(spa);
1337 for (i = 0; i < spa->spa_spares.sav_count; i++)
1338 vdev_free(spa->spa_spares.sav_vdevs[i]);
1339 if (spa->spa_spares.sav_vdevs) {
1340 kmem_free(spa->spa_spares.sav_vdevs,
1341 spa->spa_spares.sav_count * sizeof (void *));
1342 spa->spa_spares.sav_vdevs = NULL;
1344 if (spa->spa_spares.sav_config) {
1345 nvlist_free(spa->spa_spares.sav_config);
1346 spa->spa_spares.sav_config = NULL;
1348 spa->spa_spares.sav_count = 0;
1350 for (i = 0; i < spa->spa_l2cache.sav_count; i++) {
1351 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]);
1352 vdev_free(spa->spa_l2cache.sav_vdevs[i]);
1354 if (spa->spa_l2cache.sav_vdevs) {
1355 kmem_free(spa->spa_l2cache.sav_vdevs,
1356 spa->spa_l2cache.sav_count * sizeof (void *));
1357 spa->spa_l2cache.sav_vdevs = NULL;
1359 if (spa->spa_l2cache.sav_config) {
1360 nvlist_free(spa->spa_l2cache.sav_config);
1361 spa->spa_l2cache.sav_config = NULL;
1363 spa->spa_l2cache.sav_count = 0;
1365 spa->spa_async_suspended = 0;
1367 if (spa->spa_comment != NULL) {
1368 spa_strfree(spa->spa_comment);
1369 spa->spa_comment = NULL;
1372 spa_config_exit(spa, SCL_ALL, FTAG);
1376 * Load (or re-load) the current list of vdevs describing the active spares for
1377 * this pool. When this is called, we have some form of basic information in
1378 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1379 * then re-generate a more complete list including status information.
1382 spa_load_spares(spa_t *spa)
1389 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1392 * First, close and free any existing spare vdevs.
1394 for (i = 0; i < spa->spa_spares.sav_count; i++) {
1395 vd = spa->spa_spares.sav_vdevs[i];
1397 /* Undo the call to spa_activate() below */
1398 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
1399 B_FALSE)) != NULL && tvd->vdev_isspare)
1400 spa_spare_remove(tvd);
1405 if (spa->spa_spares.sav_vdevs)
1406 kmem_free(spa->spa_spares.sav_vdevs,
1407 spa->spa_spares.sav_count * sizeof (void *));
1409 if (spa->spa_spares.sav_config == NULL)
1412 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
1413 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
1415 spa->spa_spares.sav_count = (int)nspares;
1416 spa->spa_spares.sav_vdevs = NULL;
1422 * Construct the array of vdevs, opening them to get status in the
1423 * process. For each spare, there is potentially two different vdev_t
1424 * structures associated with it: one in the list of spares (used only
1425 * for basic validation purposes) and one in the active vdev
1426 * configuration (if it's spared in). During this phase we open and
1427 * validate each vdev on the spare list. If the vdev also exists in the
1428 * active configuration, then we also mark this vdev as an active spare.
1430 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *),
1432 for (i = 0; i < spa->spa_spares.sav_count; i++) {
1433 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0,
1434 VDEV_ALLOC_SPARE) == 0);
1437 spa->spa_spares.sav_vdevs[i] = vd;
1439 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
1440 B_FALSE)) != NULL) {
1441 if (!tvd->vdev_isspare)
1445 * We only mark the spare active if we were successfully
1446 * able to load the vdev. Otherwise, importing a pool
1447 * with a bad active spare would result in strange
1448 * behavior, because multiple pool would think the spare
1449 * is actively in use.
1451 * There is a vulnerability here to an equally bizarre
1452 * circumstance, where a dead active spare is later
1453 * brought back to life (onlined or otherwise). Given
1454 * the rarity of this scenario, and the extra complexity
1455 * it adds, we ignore the possibility.
1457 if (!vdev_is_dead(tvd))
1458 spa_spare_activate(tvd);
1462 vd->vdev_aux = &spa->spa_spares;
1464 if (vdev_open(vd) != 0)
1467 if (vdev_validate_aux(vd) == 0)
1472 * Recompute the stashed list of spares, with status information
1475 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES,
1476 DATA_TYPE_NVLIST_ARRAY) == 0);
1478 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *),
1480 for (i = 0; i < spa->spa_spares.sav_count; i++)
1481 spares[i] = vdev_config_generate(spa,
1482 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE);
1483 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
1484 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0);
1485 for (i = 0; i < spa->spa_spares.sav_count; i++)
1486 nvlist_free(spares[i]);
1487 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *));
1491 * Load (or re-load) the current list of vdevs describing the active l2cache for
1492 * this pool. When this is called, we have some form of basic information in
1493 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1494 * then re-generate a more complete list including status information.
1495 * Devices which are already active have their details maintained, and are
1499 spa_load_l2cache(spa_t *spa)
1503 int i, j, oldnvdevs;
1505 vdev_t *vd, **oldvdevs, **newvdevs;
1506 spa_aux_vdev_t *sav = &spa->spa_l2cache;
1508 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
1510 if (sav->sav_config != NULL) {
1511 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config,
1512 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
1513 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP);
1519 oldvdevs = sav->sav_vdevs;
1520 oldnvdevs = sav->sav_count;
1521 sav->sav_vdevs = NULL;
1525 * Process new nvlist of vdevs.
1527 for (i = 0; i < nl2cache; i++) {
1528 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID,
1532 for (j = 0; j < oldnvdevs; j++) {
1534 if (vd != NULL && guid == vd->vdev_guid) {
1536 * Retain previous vdev for add/remove ops.
1544 if (newvdevs[i] == NULL) {
1548 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0,
1549 VDEV_ALLOC_L2CACHE) == 0);
1554 * Commit this vdev as an l2cache device,
1555 * even if it fails to open.
1557 spa_l2cache_add(vd);
1562 spa_l2cache_activate(vd);
1564 if (vdev_open(vd) != 0)
1567 (void) vdev_validate_aux(vd);
1569 if (!vdev_is_dead(vd))
1570 l2arc_add_vdev(spa, vd);
1575 * Purge vdevs that were dropped
1577 for (i = 0; i < oldnvdevs; i++) {
1582 ASSERT(vd->vdev_isl2cache);
1584 if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
1585 pool != 0ULL && l2arc_vdev_present(vd))
1586 l2arc_remove_vdev(vd);
1587 vdev_clear_stats(vd);
1593 kmem_free(oldvdevs, oldnvdevs * sizeof (void *));
1595 if (sav->sav_config == NULL)
1598 sav->sav_vdevs = newvdevs;
1599 sav->sav_count = (int)nl2cache;
1602 * Recompute the stashed list of l2cache devices, with status
1603 * information this time.
1605 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE,
1606 DATA_TYPE_NVLIST_ARRAY) == 0);
1608 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
1609 for (i = 0; i < sav->sav_count; i++)
1610 l2cache[i] = vdev_config_generate(spa,
1611 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE);
1612 VERIFY(nvlist_add_nvlist_array(sav->sav_config,
1613 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0);
1615 for (i = 0; i < sav->sav_count; i++)
1616 nvlist_free(l2cache[i]);
1618 kmem_free(l2cache, sav->sav_count * sizeof (void *));
1622 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value)
1625 char *packed = NULL;
1630 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db);
1634 nvsize = *(uint64_t *)db->db_data;
1635 dmu_buf_rele(db, FTAG);
1637 packed = kmem_alloc(nvsize, KM_SLEEP);
1638 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed,
1641 error = nvlist_unpack(packed, nvsize, value, 0);
1642 kmem_free(packed, nvsize);
1648 * Checks to see if the given vdev could not be opened, in which case we post a
1649 * sysevent to notify the autoreplace code that the device has been removed.
1652 spa_check_removed(vdev_t *vd)
1654 for (int c = 0; c < vd->vdev_children; c++)
1655 spa_check_removed(vd->vdev_child[c]);
1657 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) &&
1659 zfs_post_autoreplace(vd->vdev_spa, vd);
1660 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK);
1665 * Validate the current config against the MOS config
1668 spa_config_valid(spa_t *spa, nvlist_t *config)
1670 vdev_t *mrvd, *rvd = spa->spa_root_vdev;
1673 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0);
1675 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1676 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0);
1678 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children);
1681 * If we're doing a normal import, then build up any additional
1682 * diagnostic information about missing devices in this config.
1683 * We'll pass this up to the user for further processing.
1685 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) {
1686 nvlist_t **child, *nv;
1689 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **),
1691 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0);
1693 for (int c = 0; c < rvd->vdev_children; c++) {
1694 vdev_t *tvd = rvd->vdev_child[c];
1695 vdev_t *mtvd = mrvd->vdev_child[c];
1697 if (tvd->vdev_ops == &vdev_missing_ops &&
1698 mtvd->vdev_ops != &vdev_missing_ops &&
1700 child[idx++] = vdev_config_generate(spa, mtvd,
1705 VERIFY(nvlist_add_nvlist_array(nv,
1706 ZPOOL_CONFIG_CHILDREN, child, idx) == 0);
1707 VERIFY(nvlist_add_nvlist(spa->spa_load_info,
1708 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0);
1710 for (int i = 0; i < idx; i++)
1711 nvlist_free(child[i]);
1714 kmem_free(child, rvd->vdev_children * sizeof (char **));
1718 * Compare the root vdev tree with the information we have
1719 * from the MOS config (mrvd). Check each top-level vdev
1720 * with the corresponding MOS config top-level (mtvd).
1722 for (int c = 0; c < rvd->vdev_children; c++) {
1723 vdev_t *tvd = rvd->vdev_child[c];
1724 vdev_t *mtvd = mrvd->vdev_child[c];
1727 * Resolve any "missing" vdevs in the current configuration.
1728 * If we find that the MOS config has more accurate information
1729 * about the top-level vdev then use that vdev instead.
1731 if (tvd->vdev_ops == &vdev_missing_ops &&
1732 mtvd->vdev_ops != &vdev_missing_ops) {
1734 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG))
1738 * Device specific actions.
1740 if (mtvd->vdev_islog) {
1741 spa_set_log_state(spa, SPA_LOG_CLEAR);
1744 * XXX - once we have 'readonly' pool
1745 * support we should be able to handle
1746 * missing data devices by transitioning
1747 * the pool to readonly.
1753 * Swap the missing vdev with the data we were
1754 * able to obtain from the MOS config.
1756 vdev_remove_child(rvd, tvd);
1757 vdev_remove_child(mrvd, mtvd);
1759 vdev_add_child(rvd, mtvd);
1760 vdev_add_child(mrvd, tvd);
1762 spa_config_exit(spa, SCL_ALL, FTAG);
1764 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
1767 } else if (mtvd->vdev_islog) {
1769 * Load the slog device's state from the MOS config
1770 * since it's possible that the label does not
1771 * contain the most up-to-date information.
1773 vdev_load_log_state(tvd, mtvd);
1778 spa_config_exit(spa, SCL_ALL, FTAG);
1781 * Ensure we were able to validate the config.
1783 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum);
1787 * Check for missing log devices
1790 spa_check_logs(spa_t *spa)
1792 boolean_t rv = B_FALSE;
1793 dsl_pool_t *dp = spa_get_dsl(spa);
1795 switch (spa->spa_log_state) {
1796 case SPA_LOG_MISSING:
1797 /* need to recheck in case slog has been restored */
1798 case SPA_LOG_UNKNOWN:
1799 rv = (dmu_objset_find_dp(dp, dp->dp_root_dir_obj,
1800 zil_check_log_chain, NULL, DS_FIND_CHILDREN) != 0);
1802 spa_set_log_state(spa, SPA_LOG_MISSING);
1809 spa_passivate_log(spa_t *spa)
1811 vdev_t *rvd = spa->spa_root_vdev;
1812 boolean_t slog_found = B_FALSE;
1814 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER));
1816 if (!spa_has_slogs(spa))
1819 for (int c = 0; c < rvd->vdev_children; c++) {
1820 vdev_t *tvd = rvd->vdev_child[c];
1821 metaslab_group_t *mg = tvd->vdev_mg;
1823 if (tvd->vdev_islog) {
1824 metaslab_group_passivate(mg);
1825 slog_found = B_TRUE;
1829 return (slog_found);
1833 spa_activate_log(spa_t *spa)
1835 vdev_t *rvd = spa->spa_root_vdev;
1837 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER));
1839 for (int c = 0; c < rvd->vdev_children; c++) {
1840 vdev_t *tvd = rvd->vdev_child[c];
1841 metaslab_group_t *mg = tvd->vdev_mg;
1843 if (tvd->vdev_islog)
1844 metaslab_group_activate(mg);
1849 spa_offline_log(spa_t *spa)
1853 error = dmu_objset_find(spa_name(spa), zil_vdev_offline,
1854 NULL, DS_FIND_CHILDREN);
1857 * We successfully offlined the log device, sync out the
1858 * current txg so that the "stubby" block can be removed
1861 txg_wait_synced(spa->spa_dsl_pool, 0);
1867 spa_aux_check_removed(spa_aux_vdev_t *sav)
1871 for (i = 0; i < sav->sav_count; i++)
1872 spa_check_removed(sav->sav_vdevs[i]);
1876 spa_claim_notify(zio_t *zio)
1878 spa_t *spa = zio->io_spa;
1883 mutex_enter(&spa->spa_props_lock); /* any mutex will do */
1884 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth)
1885 spa->spa_claim_max_txg = zio->io_bp->blk_birth;
1886 mutex_exit(&spa->spa_props_lock);
1889 typedef struct spa_load_error {
1890 uint64_t sle_meta_count;
1891 uint64_t sle_data_count;
1895 spa_load_verify_done(zio_t *zio)
1897 blkptr_t *bp = zio->io_bp;
1898 spa_load_error_t *sle = zio->io_private;
1899 dmu_object_type_t type = BP_GET_TYPE(bp);
1900 int error = zio->io_error;
1901 spa_t *spa = zio->io_spa;
1904 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) &&
1905 type != DMU_OT_INTENT_LOG)
1906 atomic_inc_64(&sle->sle_meta_count);
1908 atomic_inc_64(&sle->sle_data_count);
1910 zio_data_buf_free(zio->io_data, zio->io_size);
1912 mutex_enter(&spa->spa_scrub_lock);
1913 spa->spa_scrub_inflight--;
1914 cv_broadcast(&spa->spa_scrub_io_cv);
1915 mutex_exit(&spa->spa_scrub_lock);
1919 * Maximum number of concurrent scrub i/os to create while verifying
1920 * a pool while importing it.
1922 int spa_load_verify_maxinflight = 10000;
1923 boolean_t spa_load_verify_metadata = B_TRUE;
1924 boolean_t spa_load_verify_data = B_TRUE;
1926 SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_maxinflight, CTLFLAG_RWTUN,
1927 &spa_load_verify_maxinflight, 0,
1928 "Maximum number of concurrent scrub I/Os to create while verifying a "
1929 "pool while importing it");
1931 SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_metadata, CTLFLAG_RWTUN,
1932 &spa_load_verify_metadata, 0,
1933 "Check metadata on import?");
1935 SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_data, CTLFLAG_RWTUN,
1936 &spa_load_verify_data, 0,
1937 "Check user data on import?");
1941 spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
1942 const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
1944 if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
1947 * Note: normally this routine will not be called if
1948 * spa_load_verify_metadata is not set. However, it may be useful
1949 * to manually set the flag after the traversal has begun.
1951 if (!spa_load_verify_metadata)
1953 if (BP_GET_BUFC_TYPE(bp) == ARC_BUFC_DATA && !spa_load_verify_data)
1957 size_t size = BP_GET_PSIZE(bp);
1958 void *data = zio_data_buf_alloc(size);
1960 mutex_enter(&spa->spa_scrub_lock);
1961 while (spa->spa_scrub_inflight >= spa_load_verify_maxinflight)
1962 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
1963 spa->spa_scrub_inflight++;
1964 mutex_exit(&spa->spa_scrub_lock);
1966 zio_nowait(zio_read(rio, spa, bp, data, size,
1967 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB,
1968 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL |
1969 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb));
1975 verify_dataset_name_len(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg)
1977 if (dsl_dataset_namelen(ds) >= ZFS_MAX_DATASET_NAME_LEN)
1978 return (SET_ERROR(ENAMETOOLONG));
1984 spa_load_verify(spa_t *spa)
1987 spa_load_error_t sle = { 0 };
1988 zpool_rewind_policy_t policy;
1989 boolean_t verify_ok = B_FALSE;
1992 zpool_get_rewind_policy(spa->spa_config, &policy);
1994 if (policy.zrp_request & ZPOOL_NEVER_REWIND)
1997 dsl_pool_config_enter(spa->spa_dsl_pool, FTAG);
1998 error = dmu_objset_find_dp(spa->spa_dsl_pool,
1999 spa->spa_dsl_pool->dp_root_dir_obj, verify_dataset_name_len, NULL,
2001 dsl_pool_config_exit(spa->spa_dsl_pool, FTAG);
2005 rio = zio_root(spa, NULL, &sle,
2006 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE);
2008 if (spa_load_verify_metadata) {
2009 error = traverse_pool(spa, spa->spa_verify_min_txg,
2010 TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA,
2011 spa_load_verify_cb, rio);
2014 (void) zio_wait(rio);
2016 spa->spa_load_meta_errors = sle.sle_meta_count;
2017 spa->spa_load_data_errors = sle.sle_data_count;
2019 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta &&
2020 sle.sle_data_count <= policy.zrp_maxdata) {
2024 spa->spa_load_txg = spa->spa_uberblock.ub_txg;
2025 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp;
2027 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts;
2028 VERIFY(nvlist_add_uint64(spa->spa_load_info,
2029 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0);
2030 VERIFY(nvlist_add_int64(spa->spa_load_info,
2031 ZPOOL_CONFIG_REWIND_TIME, loss) == 0);
2032 VERIFY(nvlist_add_uint64(spa->spa_load_info,
2033 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0);
2035 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg;
2039 if (error != ENXIO && error != EIO)
2040 error = SET_ERROR(EIO);
2044 return (verify_ok ? 0 : EIO);
2048 * Find a value in the pool props object.
2051 spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val)
2053 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object,
2054 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val);
2058 * Find a value in the pool directory object.
2061 spa_dir_prop(spa_t *spa, const char *name, uint64_t *val)
2063 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
2064 name, sizeof (uint64_t), 1, val));
2068 spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err)
2070 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux);
2075 * Fix up config after a partly-completed split. This is done with the
2076 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
2077 * pool have that entry in their config, but only the splitting one contains
2078 * a list of all the guids of the vdevs that are being split off.
2080 * This function determines what to do with that list: either rejoin
2081 * all the disks to the pool, or complete the splitting process. To attempt
2082 * the rejoin, each disk that is offlined is marked online again, and
2083 * we do a reopen() call. If the vdev label for every disk that was
2084 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
2085 * then we call vdev_split() on each disk, and complete the split.
2087 * Otherwise we leave the config alone, with all the vdevs in place in
2088 * the original pool.
2091 spa_try_repair(spa_t *spa, nvlist_t *config)
2098 boolean_t attempt_reopen;
2100 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0)
2103 /* check that the config is complete */
2104 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST,
2105 &glist, &gcount) != 0)
2108 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP);
2110 /* attempt to online all the vdevs & validate */
2111 attempt_reopen = B_TRUE;
2112 for (i = 0; i < gcount; i++) {
2113 if (glist[i] == 0) /* vdev is hole */
2116 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE);
2117 if (vd[i] == NULL) {
2119 * Don't bother attempting to reopen the disks;
2120 * just do the split.
2122 attempt_reopen = B_FALSE;
2124 /* attempt to re-online it */
2125 vd[i]->vdev_offline = B_FALSE;
2129 if (attempt_reopen) {
2130 vdev_reopen(spa->spa_root_vdev);
2132 /* check each device to see what state it's in */
2133 for (extracted = 0, i = 0; i < gcount; i++) {
2134 if (vd[i] != NULL &&
2135 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL)
2142 * If every disk has been moved to the new pool, or if we never
2143 * even attempted to look at them, then we split them off for
2146 if (!attempt_reopen || gcount == extracted) {
2147 for (i = 0; i < gcount; i++)
2150 vdev_reopen(spa->spa_root_vdev);
2153 kmem_free(vd, gcount * sizeof (vdev_t *));
2157 spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type,
2158 boolean_t mosconfig)
2160 nvlist_t *config = spa->spa_config;
2161 char *ereport = FM_EREPORT_ZFS_POOL;
2167 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid))
2168 return (SET_ERROR(EINVAL));
2170 ASSERT(spa->spa_comment == NULL);
2171 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0)
2172 spa->spa_comment = spa_strdup(comment);
2175 * Versioning wasn't explicitly added to the label until later, so if
2176 * it's not present treat it as the initial version.
2178 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
2179 &spa->spa_ubsync.ub_version) != 0)
2180 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
2182 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG,
2183 &spa->spa_config_txg);
2185 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) &&
2186 spa_guid_exists(pool_guid, 0)) {
2187 error = SET_ERROR(EEXIST);
2189 spa->spa_config_guid = pool_guid;
2191 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT,
2193 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting,
2197 nvlist_free(spa->spa_load_info);
2198 spa->spa_load_info = fnvlist_alloc();
2200 gethrestime(&spa->spa_loaded_ts);
2201 error = spa_load_impl(spa, pool_guid, config, state, type,
2202 mosconfig, &ereport);
2206 * Don't count references from objsets that are already closed
2207 * and are making their way through the eviction process.
2209 spa_evicting_os_wait(spa);
2210 spa->spa_minref = refcount_count(&spa->spa_refcount);
2212 if (error != EEXIST) {
2213 spa->spa_loaded_ts.tv_sec = 0;
2214 spa->spa_loaded_ts.tv_nsec = 0;
2216 if (error != EBADF) {
2217 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0);
2220 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE;
2227 * Load an existing storage pool, using the pool's builtin spa_config as a
2228 * source of configuration information.
2231 spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config,
2232 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig,
2236 nvlist_t *nvroot = NULL;
2239 uberblock_t *ub = &spa->spa_uberblock;
2240 uint64_t children, config_cache_txg = spa->spa_config_txg;
2241 int orig_mode = spa->spa_mode;
2244 boolean_t missing_feat_write = B_FALSE;
2247 * If this is an untrusted config, access the pool in read-only mode.
2248 * This prevents things like resilvering recently removed devices.
2251 spa->spa_mode = FREAD;
2253 ASSERT(MUTEX_HELD(&spa_namespace_lock));
2255 spa->spa_load_state = state;
2257 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot))
2258 return (SET_ERROR(EINVAL));
2260 parse = (type == SPA_IMPORT_EXISTING ?
2261 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT);
2264 * Create "The Godfather" zio to hold all async IOs
2266 spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *),
2268 for (int i = 0; i < max_ncpus; i++) {
2269 spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
2270 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
2271 ZIO_FLAG_GODFATHER);
2275 * Parse the configuration into a vdev tree. We explicitly set the
2276 * value that will be returned by spa_version() since parsing the
2277 * configuration requires knowing the version number.
2279 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2280 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse);
2281 spa_config_exit(spa, SCL_ALL, FTAG);
2286 ASSERT(spa->spa_root_vdev == rvd);
2287 ASSERT3U(spa->spa_min_ashift, >=, SPA_MINBLOCKSHIFT);
2288 ASSERT3U(spa->spa_max_ashift, <=, SPA_MAXBLOCKSHIFT);
2290 if (type != SPA_IMPORT_ASSEMBLE) {
2291 ASSERT(spa_guid(spa) == pool_guid);
2295 * Try to open all vdevs, loading each label in the process.
2297 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2298 error = vdev_open(rvd);
2299 spa_config_exit(spa, SCL_ALL, FTAG);
2304 * We need to validate the vdev labels against the configuration that
2305 * we have in hand, which is dependent on the setting of mosconfig. If
2306 * mosconfig is true then we're validating the vdev labels based on
2307 * that config. Otherwise, we're validating against the cached config
2308 * (zpool.cache) that was read when we loaded the zfs module, and then
2309 * later we will recursively call spa_load() and validate against
2312 * If we're assembling a new pool that's been split off from an
2313 * existing pool, the labels haven't yet been updated so we skip
2314 * validation for now.
2316 if (type != SPA_IMPORT_ASSEMBLE) {
2317 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2318 error = vdev_validate(rvd, mosconfig);
2319 spa_config_exit(spa, SCL_ALL, FTAG);
2324 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN)
2325 return (SET_ERROR(ENXIO));
2329 * Find the best uberblock.
2331 vdev_uberblock_load(rvd, ub, &label);
2334 * If we weren't able to find a single valid uberblock, return failure.
2336 if (ub->ub_txg == 0) {
2338 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO));
2342 * If the pool has an unsupported version we can't open it.
2344 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) {
2346 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP));
2349 if (ub->ub_version >= SPA_VERSION_FEATURES) {
2353 * If we weren't able to find what's necessary for reading the
2354 * MOS in the label, return failure.
2356 if (label == NULL || nvlist_lookup_nvlist(label,
2357 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) {
2359 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA,
2364 * Update our in-core representation with the definitive values
2367 nvlist_free(spa->spa_label_features);
2368 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0);
2374 * Look through entries in the label nvlist's features_for_read. If
2375 * there is a feature listed there which we don't understand then we
2376 * cannot open a pool.
2378 if (ub->ub_version >= SPA_VERSION_FEATURES) {
2379 nvlist_t *unsup_feat;
2381 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) ==
2384 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features,
2386 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) {
2387 if (!zfeature_is_supported(nvpair_name(nvp))) {
2388 VERIFY(nvlist_add_string(unsup_feat,
2389 nvpair_name(nvp), "") == 0);
2393 if (!nvlist_empty(unsup_feat)) {
2394 VERIFY(nvlist_add_nvlist(spa->spa_load_info,
2395 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0);
2396 nvlist_free(unsup_feat);
2397 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT,
2401 nvlist_free(unsup_feat);
2405 * If the vdev guid sum doesn't match the uberblock, we have an
2406 * incomplete configuration. We first check to see if the pool
2407 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
2408 * If it is, defer the vdev_guid_sum check till later so we
2409 * can handle missing vdevs.
2411 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN,
2412 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE &&
2413 rvd->vdev_guid_sum != ub->ub_guid_sum)
2414 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO));
2416 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) {
2417 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2418 spa_try_repair(spa, config);
2419 spa_config_exit(spa, SCL_ALL, FTAG);
2420 nvlist_free(spa->spa_config_splitting);
2421 spa->spa_config_splitting = NULL;
2425 * Initialize internal SPA structures.
2427 spa->spa_state = POOL_STATE_ACTIVE;
2428 spa->spa_ubsync = spa->spa_uberblock;
2429 spa->spa_verify_min_txg = spa->spa_extreme_rewind ?
2430 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1;
2431 spa->spa_first_txg = spa->spa_last_ubsync_txg ?
2432 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1;
2433 spa->spa_claim_max_txg = spa->spa_first_txg;
2434 spa->spa_prev_software_version = ub->ub_software_version;
2436 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool);
2438 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2439 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset;
2441 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0)
2442 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2444 if (spa_version(spa) >= SPA_VERSION_FEATURES) {
2445 boolean_t missing_feat_read = B_FALSE;
2446 nvlist_t *unsup_feat, *enabled_feat;
2448 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ,
2449 &spa->spa_feat_for_read_obj) != 0) {
2450 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2453 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE,
2454 &spa->spa_feat_for_write_obj) != 0) {
2455 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2458 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS,
2459 &spa->spa_feat_desc_obj) != 0) {
2460 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2463 enabled_feat = fnvlist_alloc();
2464 unsup_feat = fnvlist_alloc();
2466 if (!spa_features_check(spa, B_FALSE,
2467 unsup_feat, enabled_feat))
2468 missing_feat_read = B_TRUE;
2470 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) {
2471 if (!spa_features_check(spa, B_TRUE,
2472 unsup_feat, enabled_feat)) {
2473 missing_feat_write = B_TRUE;
2477 fnvlist_add_nvlist(spa->spa_load_info,
2478 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat);
2480 if (!nvlist_empty(unsup_feat)) {
2481 fnvlist_add_nvlist(spa->spa_load_info,
2482 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat);
2485 fnvlist_free(enabled_feat);
2486 fnvlist_free(unsup_feat);
2488 if (!missing_feat_read) {
2489 fnvlist_add_boolean(spa->spa_load_info,
2490 ZPOOL_CONFIG_CAN_RDONLY);
2494 * If the state is SPA_LOAD_TRYIMPORT, our objective is
2495 * twofold: to determine whether the pool is available for
2496 * import in read-write mode and (if it is not) whether the
2497 * pool is available for import in read-only mode. If the pool
2498 * is available for import in read-write mode, it is displayed
2499 * as available in userland; if it is not available for import
2500 * in read-only mode, it is displayed as unavailable in
2501 * userland. If the pool is available for import in read-only
2502 * mode but not read-write mode, it is displayed as unavailable
2503 * in userland with a special note that the pool is actually
2504 * available for open in read-only mode.
2506 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are
2507 * missing a feature for write, we must first determine whether
2508 * the pool can be opened read-only before returning to
2509 * userland in order to know whether to display the
2510 * abovementioned note.
2512 if (missing_feat_read || (missing_feat_write &&
2513 spa_writeable(spa))) {
2514 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT,
2519 * Load refcounts for ZFS features from disk into an in-memory
2520 * cache during SPA initialization.
2522 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
2525 error = feature_get_refcount_from_disk(spa,
2526 &spa_feature_table[i], &refcount);
2528 spa->spa_feat_refcount_cache[i] = refcount;
2529 } else if (error == ENOTSUP) {
2530 spa->spa_feat_refcount_cache[i] =
2531 SPA_FEATURE_DISABLED;
2533 return (spa_vdev_err(rvd,
2534 VDEV_AUX_CORRUPT_DATA, EIO));
2539 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) {
2540 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG,
2541 &spa->spa_feat_enabled_txg_obj) != 0)
2542 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2545 spa->spa_is_initializing = B_TRUE;
2546 error = dsl_pool_open(spa->spa_dsl_pool);
2547 spa->spa_is_initializing = B_FALSE;
2549 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2553 nvlist_t *policy = NULL, *nvconfig;
2555 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0)
2556 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2558 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig,
2559 ZPOOL_CONFIG_HOSTID, &hostid) == 0) {
2561 unsigned long myhostid = 0;
2563 VERIFY(nvlist_lookup_string(nvconfig,
2564 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0);
2567 myhostid = zone_get_hostid(NULL);
2570 * We're emulating the system's hostid in userland, so
2571 * we can't use zone_get_hostid().
2573 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid);
2574 #endif /* _KERNEL */
2575 if (check_hostid && hostid != 0 && myhostid != 0 &&
2576 hostid != myhostid) {
2577 nvlist_free(nvconfig);
2578 cmn_err(CE_WARN, "pool '%s' could not be "
2579 "loaded as it was last accessed by "
2580 "another system (host: %s hostid: 0x%lx). "
2581 "See: http://illumos.org/msg/ZFS-8000-EY",
2582 spa_name(spa), hostname,
2583 (unsigned long)hostid);
2584 return (SET_ERROR(EBADF));
2587 if (nvlist_lookup_nvlist(spa->spa_config,
2588 ZPOOL_REWIND_POLICY, &policy) == 0)
2589 VERIFY(nvlist_add_nvlist(nvconfig,
2590 ZPOOL_REWIND_POLICY, policy) == 0);
2592 spa_config_set(spa, nvconfig);
2594 spa_deactivate(spa);
2595 spa_activate(spa, orig_mode);
2597 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE));
2600 /* Grab the secret checksum salt from the MOS. */
2601 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
2602 DMU_POOL_CHECKSUM_SALT, 1,
2603 sizeof (spa->spa_cksum_salt.zcs_bytes),
2604 spa->spa_cksum_salt.zcs_bytes);
2605 if (error == ENOENT) {
2606 /* Generate a new salt for subsequent use */
2607 (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes,
2608 sizeof (spa->spa_cksum_salt.zcs_bytes));
2609 } else if (error != 0) {
2610 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2613 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0)
2614 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2615 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj);
2617 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2620 * Load the bit that tells us to use the new accounting function
2621 * (raid-z deflation). If we have an older pool, this will not
2624 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate);
2625 if (error != 0 && error != ENOENT)
2626 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2628 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION,
2629 &spa->spa_creation_version);
2630 if (error != 0 && error != ENOENT)
2631 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2634 * Load the persistent error log. If we have an older pool, this will
2637 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last);
2638 if (error != 0 && error != ENOENT)
2639 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2641 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB,
2642 &spa->spa_errlog_scrub);
2643 if (error != 0 && error != ENOENT)
2644 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2647 * Load the history object. If we have an older pool, this
2648 * will not be present.
2650 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history);
2651 if (error != 0 && error != ENOENT)
2652 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2655 * If we're assembling the pool from the split-off vdevs of
2656 * an existing pool, we don't want to attach the spares & cache
2661 * Load any hot spares for this pool.
2663 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object);
2664 if (error != 0 && error != ENOENT)
2665 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2666 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) {
2667 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES);
2668 if (load_nvlist(spa, spa->spa_spares.sav_object,
2669 &spa->spa_spares.sav_config) != 0)
2670 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2672 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2673 spa_load_spares(spa);
2674 spa_config_exit(spa, SCL_ALL, FTAG);
2675 } else if (error == 0) {
2676 spa->spa_spares.sav_sync = B_TRUE;
2680 * Load any level 2 ARC devices for this pool.
2682 error = spa_dir_prop(spa, DMU_POOL_L2CACHE,
2683 &spa->spa_l2cache.sav_object);
2684 if (error != 0 && error != ENOENT)
2685 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2686 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) {
2687 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE);
2688 if (load_nvlist(spa, spa->spa_l2cache.sav_object,
2689 &spa->spa_l2cache.sav_config) != 0)
2690 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2692 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2693 spa_load_l2cache(spa);
2694 spa_config_exit(spa, SCL_ALL, FTAG);
2695 } else if (error == 0) {
2696 spa->spa_l2cache.sav_sync = B_TRUE;
2699 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
2701 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object);
2702 if (error && error != ENOENT)
2703 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2706 uint64_t autoreplace;
2708 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs);
2709 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace);
2710 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation);
2711 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode);
2712 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand);
2713 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO,
2714 &spa->spa_dedup_ditto);
2716 spa->spa_autoreplace = (autoreplace != 0);
2720 * If the 'autoreplace' property is set, then post a resource notifying
2721 * the ZFS DE that it should not issue any faults for unopenable
2722 * devices. We also iterate over the vdevs, and post a sysevent for any
2723 * unopenable vdevs so that the normal autoreplace handler can take
2726 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) {
2727 spa_check_removed(spa->spa_root_vdev);
2729 * For the import case, this is done in spa_import(), because
2730 * at this point we're using the spare definitions from
2731 * the MOS config, not necessarily from the userland config.
2733 if (state != SPA_LOAD_IMPORT) {
2734 spa_aux_check_removed(&spa->spa_spares);
2735 spa_aux_check_removed(&spa->spa_l2cache);
2740 * Load the vdev state for all toplevel vdevs.
2745 * Propagate the leaf DTLs we just loaded all the way up the tree.
2747 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
2748 vdev_dtl_reassess(rvd, 0, 0, B_FALSE);
2749 spa_config_exit(spa, SCL_ALL, FTAG);
2752 * Load the DDTs (dedup tables).
2754 error = ddt_load(spa);
2756 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2758 spa_update_dspace(spa);
2761 * Validate the config, using the MOS config to fill in any
2762 * information which might be missing. If we fail to validate
2763 * the config then declare the pool unfit for use. If we're
2764 * assembling a pool from a split, the log is not transferred
2767 if (type != SPA_IMPORT_ASSEMBLE) {
2770 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0)
2771 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
2773 if (!spa_config_valid(spa, nvconfig)) {
2774 nvlist_free(nvconfig);
2775 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM,
2778 nvlist_free(nvconfig);
2781 * Now that we've validated the config, check the state of the
2782 * root vdev. If it can't be opened, it indicates one or
2783 * more toplevel vdevs are faulted.
2785 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN)
2786 return (SET_ERROR(ENXIO));
2788 if (spa_writeable(spa) && spa_check_logs(spa)) {
2789 *ereport = FM_EREPORT_ZFS_LOG_REPLAY;
2790 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO));
2794 if (missing_feat_write) {
2795 ASSERT(state == SPA_LOAD_TRYIMPORT);
2798 * At this point, we know that we can open the pool in
2799 * read-only mode but not read-write mode. We now have enough
2800 * information and can return to userland.
2802 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP));
2806 * We've successfully opened the pool, verify that we're ready
2807 * to start pushing transactions.
2809 if (state != SPA_LOAD_TRYIMPORT) {
2810 if (error = spa_load_verify(spa))
2811 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA,
2815 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER ||
2816 spa->spa_load_max_txg == UINT64_MAX)) {
2818 int need_update = B_FALSE;
2819 dsl_pool_t *dp = spa_get_dsl(spa);
2821 ASSERT(state != SPA_LOAD_TRYIMPORT);
2824 * Claim log blocks that haven't been committed yet.
2825 * This must all happen in a single txg.
2826 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2827 * invoked from zil_claim_log_block()'s i/o done callback.
2828 * Price of rollback is that we abandon the log.
2830 spa->spa_claiming = B_TRUE;
2832 tx = dmu_tx_create_assigned(dp, spa_first_txg(spa));
2833 (void) dmu_objset_find_dp(dp, dp->dp_root_dir_obj,
2834 zil_claim, tx, DS_FIND_CHILDREN);
2837 spa->spa_claiming = B_FALSE;
2839 spa_set_log_state(spa, SPA_LOG_GOOD);
2840 spa->spa_sync_on = B_TRUE;
2841 txg_sync_start(spa->spa_dsl_pool);
2844 * Wait for all claims to sync. We sync up to the highest
2845 * claimed log block birth time so that claimed log blocks
2846 * don't appear to be from the future. spa_claim_max_txg
2847 * will have been set for us by either zil_check_log_chain()
2848 * (invoked from spa_check_logs()) or zil_claim() above.
2850 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg);
2853 * If the config cache is stale, or we have uninitialized
2854 * metaslabs (see spa_vdev_add()), then update the config.
2856 * If this is a verbatim import, trust the current
2857 * in-core spa_config and update the disk labels.
2859 if (config_cache_txg != spa->spa_config_txg ||
2860 state == SPA_LOAD_IMPORT ||
2861 state == SPA_LOAD_RECOVER ||
2862 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM))
2863 need_update = B_TRUE;
2865 for (int c = 0; c < rvd->vdev_children; c++)
2866 if (rvd->vdev_child[c]->vdev_ms_array == 0)
2867 need_update = B_TRUE;
2870 * Update the config cache asychronously in case we're the
2871 * root pool, in which case the config cache isn't writable yet.
2874 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE);
2877 * Check all DTLs to see if anything needs resilvering.
2879 if (!dsl_scan_resilvering(spa->spa_dsl_pool) &&
2880 vdev_resilver_needed(rvd, NULL, NULL))
2881 spa_async_request(spa, SPA_ASYNC_RESILVER);
2884 * Log the fact that we booted up (so that we can detect if
2885 * we rebooted in the middle of an operation).
2887 spa_history_log_version(spa, "open");
2890 * Delete any inconsistent datasets.
2892 (void) dmu_objset_find(spa_name(spa),
2893 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN);
2896 * Clean up any stale temporary dataset userrefs.
2898 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool);
2905 spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig)
2907 int mode = spa->spa_mode;
2910 spa_deactivate(spa);
2912 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg - 1;
2914 spa_activate(spa, mode);
2915 spa_async_suspend(spa);
2917 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig));
2921 * If spa_load() fails this function will try loading prior txg's. If
2922 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool
2923 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this
2924 * function will not rewind the pool and will return the same error as
2928 spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig,
2929 uint64_t max_request, int rewind_flags)
2931 nvlist_t *loadinfo = NULL;
2932 nvlist_t *config = NULL;
2933 int load_error, rewind_error;
2934 uint64_t safe_rewind_txg;
2937 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) {
2938 spa->spa_load_max_txg = spa->spa_load_txg;
2939 spa_set_log_state(spa, SPA_LOG_CLEAR);
2941 spa->spa_load_max_txg = max_request;
2942 if (max_request != UINT64_MAX)
2943 spa->spa_extreme_rewind = B_TRUE;
2946 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING,
2948 if (load_error == 0)
2951 if (spa->spa_root_vdev != NULL)
2952 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
2954 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg;
2955 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp;
2957 if (rewind_flags & ZPOOL_NEVER_REWIND) {
2958 nvlist_free(config);
2959 return (load_error);
2962 if (state == SPA_LOAD_RECOVER) {
2963 /* Price of rolling back is discarding txgs, including log */
2964 spa_set_log_state(spa, SPA_LOG_CLEAR);
2967 * If we aren't rolling back save the load info from our first
2968 * import attempt so that we can restore it after attempting
2971 loadinfo = spa->spa_load_info;
2972 spa->spa_load_info = fnvlist_alloc();
2975 spa->spa_load_max_txg = spa->spa_last_ubsync_txg;
2976 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE;
2977 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ?
2978 TXG_INITIAL : safe_rewind_txg;
2981 * Continue as long as we're finding errors, we're still within
2982 * the acceptable rewind range, and we're still finding uberblocks
2984 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg &&
2985 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) {
2986 if (spa->spa_load_max_txg < safe_rewind_txg)
2987 spa->spa_extreme_rewind = B_TRUE;
2988 rewind_error = spa_load_retry(spa, state, mosconfig);
2991 spa->spa_extreme_rewind = B_FALSE;
2992 spa->spa_load_max_txg = UINT64_MAX;
2994 if (config && (rewind_error || state != SPA_LOAD_RECOVER))
2995 spa_config_set(spa, config);
2997 if (state == SPA_LOAD_RECOVER) {
2998 ASSERT3P(loadinfo, ==, NULL);
2999 return (rewind_error);
3001 /* Store the rewind info as part of the initial load info */
3002 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO,
3003 spa->spa_load_info);
3005 /* Restore the initial load info */
3006 fnvlist_free(spa->spa_load_info);
3007 spa->spa_load_info = loadinfo;
3009 return (load_error);
3016 * The import case is identical to an open except that the configuration is sent
3017 * down from userland, instead of grabbed from the configuration cache. For the
3018 * case of an open, the pool configuration will exist in the
3019 * POOL_STATE_UNINITIALIZED state.
3021 * The stats information (gen/count/ustats) is used to gather vdev statistics at
3022 * the same time open the pool, without having to keep around the spa_t in some
3026 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy,
3030 spa_load_state_t state = SPA_LOAD_OPEN;
3032 int locked = B_FALSE;
3033 int firstopen = B_FALSE;
3038 * As disgusting as this is, we need to support recursive calls to this
3039 * function because dsl_dir_open() is called during spa_load(), and ends
3040 * up calling spa_open() again. The real fix is to figure out how to
3041 * avoid dsl_dir_open() calling this in the first place.
3043 if (mutex_owner(&spa_namespace_lock) != curthread) {
3044 mutex_enter(&spa_namespace_lock);
3048 if ((spa = spa_lookup(pool)) == NULL) {
3050 mutex_exit(&spa_namespace_lock);
3051 return (SET_ERROR(ENOENT));
3054 if (spa->spa_state == POOL_STATE_UNINITIALIZED) {
3055 zpool_rewind_policy_t policy;
3059 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config,
3061 if (policy.zrp_request & ZPOOL_DO_REWIND)
3062 state = SPA_LOAD_RECOVER;
3064 spa_activate(spa, spa_mode_global);
3066 if (state != SPA_LOAD_RECOVER)
3067 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0;
3069 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg,
3070 policy.zrp_request);
3072 if (error == EBADF) {
3074 * If vdev_validate() returns failure (indicated by
3075 * EBADF), it indicates that one of the vdevs indicates
3076 * that the pool has been exported or destroyed. If
3077 * this is the case, the config cache is out of sync and
3078 * we should remove the pool from the namespace.
3081 spa_deactivate(spa);
3082 spa_config_sync(spa, B_TRUE, B_TRUE);
3085 mutex_exit(&spa_namespace_lock);
3086 return (SET_ERROR(ENOENT));
3091 * We can't open the pool, but we still have useful
3092 * information: the state of each vdev after the
3093 * attempted vdev_open(). Return this to the user.
3095 if (config != NULL && spa->spa_config) {
3096 VERIFY(nvlist_dup(spa->spa_config, config,
3098 VERIFY(nvlist_add_nvlist(*config,
3099 ZPOOL_CONFIG_LOAD_INFO,
3100 spa->spa_load_info) == 0);
3103 spa_deactivate(spa);
3104 spa->spa_last_open_failed = error;
3106 mutex_exit(&spa_namespace_lock);
3112 spa_open_ref(spa, tag);
3115 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
3118 * If we've recovered the pool, pass back any information we
3119 * gathered while doing the load.
3121 if (state == SPA_LOAD_RECOVER) {
3122 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO,
3123 spa->spa_load_info) == 0);
3127 spa->spa_last_open_failed = 0;
3128 spa->spa_last_ubsync_txg = 0;
3129 spa->spa_load_txg = 0;
3130 mutex_exit(&spa_namespace_lock);
3134 zvol_create_minors(spa->spa_name);
3145 spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy,
3148 return (spa_open_common(name, spapp, tag, policy, config));
3152 spa_open(const char *name, spa_t **spapp, void *tag)
3154 return (spa_open_common(name, spapp, tag, NULL, NULL));
3158 * Lookup the given spa_t, incrementing the inject count in the process,
3159 * preventing it from being exported or destroyed.
3162 spa_inject_addref(char *name)
3166 mutex_enter(&spa_namespace_lock);
3167 if ((spa = spa_lookup(name)) == NULL) {
3168 mutex_exit(&spa_namespace_lock);
3171 spa->spa_inject_ref++;
3172 mutex_exit(&spa_namespace_lock);
3178 spa_inject_delref(spa_t *spa)
3180 mutex_enter(&spa_namespace_lock);
3181 spa->spa_inject_ref--;
3182 mutex_exit(&spa_namespace_lock);
3186 * Add spares device information to the nvlist.
3189 spa_add_spares(spa_t *spa, nvlist_t *config)
3199 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
3201 if (spa->spa_spares.sav_count == 0)
3204 VERIFY(nvlist_lookup_nvlist(config,
3205 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
3206 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
3207 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
3209 VERIFY(nvlist_add_nvlist_array(nvroot,
3210 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
3211 VERIFY(nvlist_lookup_nvlist_array(nvroot,
3212 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0);
3215 * Go through and find any spares which have since been
3216 * repurposed as an active spare. If this is the case, update
3217 * their status appropriately.
3219 for (i = 0; i < nspares; i++) {
3220 VERIFY(nvlist_lookup_uint64(spares[i],
3221 ZPOOL_CONFIG_GUID, &guid) == 0);
3222 if (spa_spare_exists(guid, &pool, NULL) &&
3224 VERIFY(nvlist_lookup_uint64_array(
3225 spares[i], ZPOOL_CONFIG_VDEV_STATS,
3226 (uint64_t **)&vs, &vsc) == 0);
3227 vs->vs_state = VDEV_STATE_CANT_OPEN;
3228 vs->vs_aux = VDEV_AUX_SPARED;
3235 * Add l2cache device information to the nvlist, including vdev stats.
3238 spa_add_l2cache(spa_t *spa, nvlist_t *config)
3241 uint_t i, j, nl2cache;
3248 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
3250 if (spa->spa_l2cache.sav_count == 0)
3253 VERIFY(nvlist_lookup_nvlist(config,
3254 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
3255 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
3256 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
3257 if (nl2cache != 0) {
3258 VERIFY(nvlist_add_nvlist_array(nvroot,
3259 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
3260 VERIFY(nvlist_lookup_nvlist_array(nvroot,
3261 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0);
3264 * Update level 2 cache device stats.
3267 for (i = 0; i < nl2cache; i++) {
3268 VERIFY(nvlist_lookup_uint64(l2cache[i],
3269 ZPOOL_CONFIG_GUID, &guid) == 0);
3272 for (j = 0; j < spa->spa_l2cache.sav_count; j++) {
3274 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) {
3275 vd = spa->spa_l2cache.sav_vdevs[j];
3281 VERIFY(nvlist_lookup_uint64_array(l2cache[i],
3282 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc)
3284 vdev_get_stats(vd, vs);
3290 spa_add_feature_stats(spa_t *spa, nvlist_t *config)
3296 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER));
3297 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3299 /* We may be unable to read features if pool is suspended. */
3300 if (spa_suspended(spa))
3303 if (spa->spa_feat_for_read_obj != 0) {
3304 for (zap_cursor_init(&zc, spa->spa_meta_objset,
3305 spa->spa_feat_for_read_obj);
3306 zap_cursor_retrieve(&zc, &za) == 0;
3307 zap_cursor_advance(&zc)) {
3308 ASSERT(za.za_integer_length == sizeof (uint64_t) &&
3309 za.za_num_integers == 1);
3310 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name,
3311 za.za_first_integer));
3313 zap_cursor_fini(&zc);
3316 if (spa->spa_feat_for_write_obj != 0) {
3317 for (zap_cursor_init(&zc, spa->spa_meta_objset,
3318 spa->spa_feat_for_write_obj);
3319 zap_cursor_retrieve(&zc, &za) == 0;
3320 zap_cursor_advance(&zc)) {
3321 ASSERT(za.za_integer_length == sizeof (uint64_t) &&
3322 za.za_num_integers == 1);
3323 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name,
3324 za.za_first_integer));
3326 zap_cursor_fini(&zc);
3330 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS,
3332 nvlist_free(features);
3336 spa_get_stats(const char *name, nvlist_t **config,
3337 char *altroot, size_t buflen)
3343 error = spa_open_common(name, &spa, FTAG, NULL, config);
3347 * This still leaves a window of inconsistency where the spares
3348 * or l2cache devices could change and the config would be
3349 * self-inconsistent.
3351 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
3353 if (*config != NULL) {
3354 uint64_t loadtimes[2];
3356 loadtimes[0] = spa->spa_loaded_ts.tv_sec;
3357 loadtimes[1] = spa->spa_loaded_ts.tv_nsec;
3358 VERIFY(nvlist_add_uint64_array(*config,
3359 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0);
3361 VERIFY(nvlist_add_uint64(*config,
3362 ZPOOL_CONFIG_ERRCOUNT,
3363 spa_get_errlog_size(spa)) == 0);
3365 if (spa_suspended(spa))
3366 VERIFY(nvlist_add_uint64(*config,
3367 ZPOOL_CONFIG_SUSPENDED,
3368 spa->spa_failmode) == 0);
3370 spa_add_spares(spa, *config);
3371 spa_add_l2cache(spa, *config);
3372 spa_add_feature_stats(spa, *config);
3377 * We want to get the alternate root even for faulted pools, so we cheat
3378 * and call spa_lookup() directly.
3382 mutex_enter(&spa_namespace_lock);
3383 spa = spa_lookup(name);
3385 spa_altroot(spa, altroot, buflen);
3389 mutex_exit(&spa_namespace_lock);
3391 spa_altroot(spa, altroot, buflen);
3396 spa_config_exit(spa, SCL_CONFIG, FTAG);
3397 spa_close(spa, FTAG);
3404 * Validate that the auxiliary device array is well formed. We must have an
3405 * array of nvlists, each which describes a valid leaf vdev. If this is an
3406 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
3407 * specified, as long as they are well-formed.
3410 spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode,
3411 spa_aux_vdev_t *sav, const char *config, uint64_t version,
3412 vdev_labeltype_t label)
3419 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
3422 * It's acceptable to have no devs specified.
3424 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0)
3428 return (SET_ERROR(EINVAL));
3431 * Make sure the pool is formatted with a version that supports this
3434 if (spa_version(spa) < version)
3435 return (SET_ERROR(ENOTSUP));
3438 * Set the pending device list so we correctly handle device in-use
3441 sav->sav_pending = dev;
3442 sav->sav_npending = ndev;
3444 for (i = 0; i < ndev; i++) {
3445 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0,
3449 if (!vd->vdev_ops->vdev_op_leaf) {
3451 error = SET_ERROR(EINVAL);
3456 * The L2ARC currently only supports disk devices in
3457 * kernel context. For user-level testing, we allow it.
3460 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) &&
3461 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) {
3462 error = SET_ERROR(ENOTBLK);
3469 if ((error = vdev_open(vd)) == 0 &&
3470 (error = vdev_label_init(vd, crtxg, label)) == 0) {
3471 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID,
3472 vd->vdev_guid) == 0);
3478 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE))
3485 sav->sav_pending = NULL;
3486 sav->sav_npending = 0;
3491 spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode)
3495 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
3497 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode,
3498 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES,
3499 VDEV_LABEL_SPARE)) != 0) {
3503 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode,
3504 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE,
3505 VDEV_LABEL_L2CACHE));
3509 spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs,
3514 if (sav->sav_config != NULL) {
3520 * Generate new dev list by concatentating with the
3523 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config,
3524 &olddevs, &oldndevs) == 0);
3526 newdevs = kmem_alloc(sizeof (void *) *
3527 (ndevs + oldndevs), KM_SLEEP);
3528 for (i = 0; i < oldndevs; i++)
3529 VERIFY(nvlist_dup(olddevs[i], &newdevs[i],
3531 for (i = 0; i < ndevs; i++)
3532 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs],
3535 VERIFY(nvlist_remove(sav->sav_config, config,
3536 DATA_TYPE_NVLIST_ARRAY) == 0);
3538 VERIFY(nvlist_add_nvlist_array(sav->sav_config,
3539 config, newdevs, ndevs + oldndevs) == 0);
3540 for (i = 0; i < oldndevs + ndevs; i++)
3541 nvlist_free(newdevs[i]);
3542 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *));
3545 * Generate a new dev list.
3547 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME,
3549 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config,
3555 * Stop and drop level 2 ARC devices
3558 spa_l2cache_drop(spa_t *spa)
3562 spa_aux_vdev_t *sav = &spa->spa_l2cache;
3564 for (i = 0; i < sav->sav_count; i++) {
3567 vd = sav->sav_vdevs[i];
3570 if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
3571 pool != 0ULL && l2arc_vdev_present(vd))
3572 l2arc_remove_vdev(vd);
3580 spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props,
3584 char *altroot = NULL;
3589 uint64_t txg = TXG_INITIAL;
3590 nvlist_t **spares, **l2cache;
3591 uint_t nspares, nl2cache;
3592 uint64_t version, obj;
3593 boolean_t has_features;
3596 * If this pool already exists, return failure.
3598 mutex_enter(&spa_namespace_lock);
3599 if (spa_lookup(pool) != NULL) {
3600 mutex_exit(&spa_namespace_lock);
3601 return (SET_ERROR(EEXIST));
3605 * Allocate a new spa_t structure.
3607 (void) nvlist_lookup_string(props,
3608 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
3609 spa = spa_add(pool, NULL, altroot);
3610 spa_activate(spa, spa_mode_global);
3612 if (props && (error = spa_prop_validate(spa, props))) {
3613 spa_deactivate(spa);
3615 mutex_exit(&spa_namespace_lock);
3619 has_features = B_FALSE;
3620 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL);
3621 elem != NULL; elem = nvlist_next_nvpair(props, elem)) {
3622 if (zpool_prop_feature(nvpair_name(elem)))
3623 has_features = B_TRUE;
3626 if (has_features || nvlist_lookup_uint64(props,
3627 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) {
3628 version = SPA_VERSION;
3630 ASSERT(SPA_VERSION_IS_SUPPORTED(version));
3632 spa->spa_first_txg = txg;
3633 spa->spa_uberblock.ub_txg = txg - 1;
3634 spa->spa_uberblock.ub_version = version;
3635 spa->spa_ubsync = spa->spa_uberblock;
3636 spa->spa_load_state = SPA_LOAD_CREATE;
3639 * Create "The Godfather" zio to hold all async IOs
3641 spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *),
3643 for (int i = 0; i < max_ncpus; i++) {
3644 spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL,
3645 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE |
3646 ZIO_FLAG_GODFATHER);
3650 * Create the root vdev.
3652 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3654 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD);
3656 ASSERT(error != 0 || rvd != NULL);
3657 ASSERT(error != 0 || spa->spa_root_vdev == rvd);
3659 if (error == 0 && !zfs_allocatable_devs(nvroot))
3660 error = SET_ERROR(EINVAL);
3663 (error = vdev_create(rvd, txg, B_FALSE)) == 0 &&
3664 (error = spa_validate_aux(spa, nvroot, txg,
3665 VDEV_ALLOC_ADD)) == 0) {
3666 for (int c = 0; c < rvd->vdev_children; c++) {
3667 vdev_ashift_optimize(rvd->vdev_child[c]);
3668 vdev_metaslab_set_size(rvd->vdev_child[c]);
3669 vdev_expand(rvd->vdev_child[c], txg);
3673 spa_config_exit(spa, SCL_ALL, FTAG);
3677 spa_deactivate(spa);
3679 mutex_exit(&spa_namespace_lock);
3684 * Get the list of spares, if specified.
3686 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
3687 &spares, &nspares) == 0) {
3688 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME,
3690 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
3691 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
3692 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3693 spa_load_spares(spa);
3694 spa_config_exit(spa, SCL_ALL, FTAG);
3695 spa->spa_spares.sav_sync = B_TRUE;
3699 * Get the list of level 2 cache devices, if specified.
3701 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
3702 &l2cache, &nl2cache) == 0) {
3703 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
3704 NV_UNIQUE_NAME, KM_SLEEP) == 0);
3705 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
3706 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
3707 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3708 spa_load_l2cache(spa);
3709 spa_config_exit(spa, SCL_ALL, FTAG);
3710 spa->spa_l2cache.sav_sync = B_TRUE;
3713 spa->spa_is_initializing = B_TRUE;
3714 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg);
3715 spa->spa_meta_objset = dp->dp_meta_objset;
3716 spa->spa_is_initializing = B_FALSE;
3719 * Create DDTs (dedup tables).
3723 spa_update_dspace(spa);
3725 tx = dmu_tx_create_assigned(dp, txg);
3728 * Create the pool config object.
3730 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset,
3731 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE,
3732 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx);
3734 if (zap_add(spa->spa_meta_objset,
3735 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG,
3736 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) {
3737 cmn_err(CE_PANIC, "failed to add pool config");
3740 if (spa_version(spa) >= SPA_VERSION_FEATURES)
3741 spa_feature_create_zap_objects(spa, tx);
3743 if (zap_add(spa->spa_meta_objset,
3744 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION,
3745 sizeof (uint64_t), 1, &version, tx) != 0) {
3746 cmn_err(CE_PANIC, "failed to add pool version");
3749 /* Newly created pools with the right version are always deflated. */
3750 if (version >= SPA_VERSION_RAIDZ_DEFLATE) {
3751 spa->spa_deflate = TRUE;
3752 if (zap_add(spa->spa_meta_objset,
3753 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
3754 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) {
3755 cmn_err(CE_PANIC, "failed to add deflate");
3760 * Create the deferred-free bpobj. Turn off compression
3761 * because sync-to-convergence takes longer if the blocksize
3764 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx);
3765 dmu_object_set_compress(spa->spa_meta_objset, obj,
3766 ZIO_COMPRESS_OFF, tx);
3767 if (zap_add(spa->spa_meta_objset,
3768 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ,
3769 sizeof (uint64_t), 1, &obj, tx) != 0) {
3770 cmn_err(CE_PANIC, "failed to add bpobj");
3772 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj,
3773 spa->spa_meta_objset, obj));
3776 * Create the pool's history object.
3778 if (version >= SPA_VERSION_ZPOOL_HISTORY)
3779 spa_history_create_obj(spa, tx);
3782 * Generate some random noise for salted checksums to operate on.
3784 (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes,
3785 sizeof (spa->spa_cksum_salt.zcs_bytes));
3788 * Set pool properties.
3790 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS);
3791 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION);
3792 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE);
3793 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND);
3795 if (props != NULL) {
3796 spa_configfile_set(spa, props, B_FALSE);
3797 spa_sync_props(props, tx);
3802 spa->spa_sync_on = B_TRUE;
3803 txg_sync_start(spa->spa_dsl_pool);
3806 * We explicitly wait for the first transaction to complete so that our
3807 * bean counters are appropriately updated.
3809 txg_wait_synced(spa->spa_dsl_pool, txg);
3811 spa_config_sync(spa, B_FALSE, B_TRUE);
3812 spa_event_notify(spa, NULL, ESC_ZFS_POOL_CREATE);
3814 spa_history_log_version(spa, "create");
3817 * Don't count references from objsets that are already closed
3818 * and are making their way through the eviction process.
3820 spa_evicting_os_wait(spa);
3821 spa->spa_minref = refcount_count(&spa->spa_refcount);
3822 spa->spa_load_state = SPA_LOAD_NONE;
3824 mutex_exit(&spa_namespace_lock);
3832 * Get the root pool information from the root disk, then import the root pool
3833 * during the system boot up time.
3835 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **);
3838 spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid)
3841 nvlist_t *nvtop, *nvroot;
3844 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0)
3848 * Add this top-level vdev to the child array.
3850 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
3852 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
3854 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0);
3857 * Put this pool's top-level vdevs into a root vdev.
3859 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
3860 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
3861 VDEV_TYPE_ROOT) == 0);
3862 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0);
3863 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0);
3864 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
3868 * Replace the existing vdev_tree with the new root vdev in
3869 * this pool's configuration (remove the old, add the new).
3871 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
3872 nvlist_free(nvroot);
3877 * Walk the vdev tree and see if we can find a device with "better"
3878 * configuration. A configuration is "better" if the label on that
3879 * device has a more recent txg.
3882 spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg)
3884 for (int c = 0; c < vd->vdev_children; c++)
3885 spa_alt_rootvdev(vd->vdev_child[c], avd, txg);
3887 if (vd->vdev_ops->vdev_op_leaf) {
3891 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid,
3895 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG,
3899 * Do we have a better boot device?
3901 if (label_txg > *txg) {
3910 * Import a root pool.
3912 * For x86. devpath_list will consist of devid and/or physpath name of
3913 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3914 * The GRUB "findroot" command will return the vdev we should boot.
3916 * For Sparc, devpath_list consists the physpath name of the booting device
3917 * no matter the rootpool is a single device pool or a mirrored pool.
3919 * "/pci@1f,0/ide@d/disk@0,0:a"
3922 spa_import_rootpool(char *devpath, char *devid)
3925 vdev_t *rvd, *bvd, *avd = NULL;
3926 nvlist_t *config, *nvtop;
3932 * Read the label from the boot device and generate a configuration.
3934 config = spa_generate_rootconf(devpath, devid, &guid);
3935 #if defined(_OBP) && defined(_KERNEL)
3936 if (config == NULL) {
3937 if (strstr(devpath, "/iscsi/ssd") != NULL) {
3939 get_iscsi_bootpath_phy(devpath);
3940 config = spa_generate_rootconf(devpath, devid, &guid);
3944 if (config == NULL) {
3945 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'",
3947 return (SET_ERROR(EIO));
3950 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
3952 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0);
3954 mutex_enter(&spa_namespace_lock);
3955 if ((spa = spa_lookup(pname)) != NULL) {
3957 * Remove the existing root pool from the namespace so that we
3958 * can replace it with the correct config we just read in.
3963 spa = spa_add(pname, config, NULL);
3964 spa->spa_is_root = B_TRUE;
3965 spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
3968 * Build up a vdev tree based on the boot device's label config.
3970 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
3972 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
3973 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
3974 VDEV_ALLOC_ROOTPOOL);
3975 spa_config_exit(spa, SCL_ALL, FTAG);
3977 mutex_exit(&spa_namespace_lock);
3978 nvlist_free(config);
3979 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
3985 * Get the boot vdev.
3987 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) {
3988 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu",
3989 (u_longlong_t)guid);
3990 error = SET_ERROR(ENOENT);
3995 * Determine if there is a better boot device.
3998 spa_alt_rootvdev(rvd, &avd, &txg);
4000 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please "
4001 "try booting from '%s'", avd->vdev_path);
4002 error = SET_ERROR(EINVAL);
4007 * If the boot device is part of a spare vdev then ensure that
4008 * we're booting off the active spare.
4010 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops &&
4011 !bvd->vdev_isspare) {
4012 cmn_err(CE_NOTE, "The boot device is currently spared. Please "
4013 "try booting from '%s'",
4015 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path);
4016 error = SET_ERROR(EINVAL);
4022 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4024 spa_config_exit(spa, SCL_ALL, FTAG);
4025 mutex_exit(&spa_namespace_lock);
4027 nvlist_free(config);
4031 #else /* !illumos */
4033 extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs,
4037 spa_generate_rootconf(const char *name)
4039 nvlist_t **configs, **tops;
4041 nvlist_t *best_cfg, *nvtop, *nvroot;
4050 if (vdev_geom_read_pool_label(name, &configs, &count) != 0)
4053 ASSERT3U(count, !=, 0);
4055 for (i = 0; i < count; i++) {
4058 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG,
4060 if (txg > best_txg) {
4062 best_cfg = configs[i];
4067 * Multi-vdev root pool configuration discovery is not supported yet.
4070 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren);
4072 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY,
4075 tops = kmem_zalloc(nchildren * sizeof(void *), KM_SLEEP);
4076 for (i = 0; i < nchildren; i++) {
4079 if (configs[i] == NULL)
4081 VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE,
4083 nvlist_dup(nvtop, &tops[i], KM_SLEEP);
4085 for (i = 0; holes != NULL && i < nholes; i++) {
4088 if (tops[holes[i]] != NULL)
4090 nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP);
4091 VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE,
4092 VDEV_TYPE_HOLE) == 0);
4093 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID,
4095 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID,
4098 for (i = 0; i < nchildren; i++) {
4099 if (tops[i] != NULL)
4101 nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP);
4102 VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE,
4103 VDEV_TYPE_MISSING) == 0);
4104 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID,
4106 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID,
4111 * Create pool config based on the best vdev config.
4113 nvlist_dup(best_cfg, &config, KM_SLEEP);
4116 * Put this pool's top-level vdevs into a root vdev.
4118 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
4120 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
4121 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
4122 VDEV_TYPE_ROOT) == 0);
4123 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0);
4124 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0);
4125 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
4126 tops, nchildren) == 0);
4129 * Replace the existing vdev_tree with the new root vdev in
4130 * this pool's configuration (remove the old, add the new).
4132 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
4135 * Drop vdev config elements that should not be present at pool level.
4137 nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64);
4138 nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64);
4140 for (i = 0; i < count; i++)
4141 nvlist_free(configs[i]);
4142 kmem_free(configs, count * sizeof(void *));
4143 for (i = 0; i < nchildren; i++)
4144 nvlist_free(tops[i]);
4145 kmem_free(tops, nchildren * sizeof(void *));
4146 nvlist_free(nvroot);
4151 spa_import_rootpool(const char *name)
4154 vdev_t *rvd, *bvd, *avd = NULL;
4155 nvlist_t *config, *nvtop;
4161 * Read the label from the boot device and generate a configuration.
4163 config = spa_generate_rootconf(name);
4165 mutex_enter(&spa_namespace_lock);
4166 if (config != NULL) {
4167 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
4168 &pname) == 0 && strcmp(name, pname) == 0);
4169 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg)
4172 if ((spa = spa_lookup(pname)) != NULL) {
4174 * Remove the existing root pool from the namespace so
4175 * that we can replace it with the correct config
4180 spa = spa_add(pname, config, NULL);
4183 * Set spa_ubsync.ub_version as it can be used in vdev_alloc()
4184 * via spa_version().
4186 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
4187 &spa->spa_ubsync.ub_version) != 0)
4188 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
4189 } else if ((spa = spa_lookup(name)) == NULL) {
4190 mutex_exit(&spa_namespace_lock);
4191 nvlist_free(config);
4192 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'",
4196 VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0);
4198 spa->spa_is_root = B_TRUE;
4199 spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
4202 * Build up a vdev tree based on the boot device's label config.
4204 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
4206 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4207 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
4208 VDEV_ALLOC_ROOTPOOL);
4209 spa_config_exit(spa, SCL_ALL, FTAG);
4211 mutex_exit(&spa_namespace_lock);
4212 nvlist_free(config);
4213 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
4218 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4220 spa_config_exit(spa, SCL_ALL, FTAG);
4221 mutex_exit(&spa_namespace_lock);
4223 nvlist_free(config);
4227 #endif /* illumos */
4228 #endif /* _KERNEL */
4231 * Import a non-root pool into the system.
4234 spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags)
4237 char *altroot = NULL;
4238 spa_load_state_t state = SPA_LOAD_IMPORT;
4239 zpool_rewind_policy_t policy;
4240 uint64_t mode = spa_mode_global;
4241 uint64_t readonly = B_FALSE;
4244 nvlist_t **spares, **l2cache;
4245 uint_t nspares, nl2cache;
4248 * If a pool with this name exists, return failure.
4250 mutex_enter(&spa_namespace_lock);
4251 if (spa_lookup(pool) != NULL) {
4252 mutex_exit(&spa_namespace_lock);
4253 return (SET_ERROR(EEXIST));
4257 * Create and initialize the spa structure.
4259 (void) nvlist_lookup_string(props,
4260 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
4261 (void) nvlist_lookup_uint64(props,
4262 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly);
4265 spa = spa_add(pool, config, altroot);
4266 spa->spa_import_flags = flags;
4269 * Verbatim import - Take a pool and insert it into the namespace
4270 * as if it had been loaded at boot.
4272 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) {
4274 spa_configfile_set(spa, props, B_FALSE);
4276 spa_config_sync(spa, B_FALSE, B_TRUE);
4277 spa_event_notify(spa, NULL, ESC_ZFS_POOL_IMPORT);
4279 mutex_exit(&spa_namespace_lock);
4283 spa_activate(spa, mode);
4286 * Don't start async tasks until we know everything is healthy.
4288 spa_async_suspend(spa);
4290 zpool_get_rewind_policy(config, &policy);
4291 if (policy.zrp_request & ZPOOL_DO_REWIND)
4292 state = SPA_LOAD_RECOVER;
4295 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
4296 * because the user-supplied config is actually the one to trust when
4299 if (state != SPA_LOAD_RECOVER)
4300 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0;
4302 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg,
4303 policy.zrp_request);
4306 * Propagate anything learned while loading the pool and pass it
4307 * back to caller (i.e. rewind info, missing devices, etc).
4309 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO,
4310 spa->spa_load_info) == 0);
4312 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4314 * Toss any existing sparelist, as it doesn't have any validity
4315 * anymore, and conflicts with spa_has_spare().
4317 if (spa->spa_spares.sav_config) {
4318 nvlist_free(spa->spa_spares.sav_config);
4319 spa->spa_spares.sav_config = NULL;
4320 spa_load_spares(spa);
4322 if (spa->spa_l2cache.sav_config) {
4323 nvlist_free(spa->spa_l2cache.sav_config);
4324 spa->spa_l2cache.sav_config = NULL;
4325 spa_load_l2cache(spa);
4328 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
4331 error = spa_validate_aux(spa, nvroot, -1ULL,
4334 error = spa_validate_aux(spa, nvroot, -1ULL,
4335 VDEV_ALLOC_L2CACHE);
4336 spa_config_exit(spa, SCL_ALL, FTAG);
4339 spa_configfile_set(spa, props, B_FALSE);
4341 if (error != 0 || (props && spa_writeable(spa) &&
4342 (error = spa_prop_set(spa, props)))) {
4344 spa_deactivate(spa);
4346 mutex_exit(&spa_namespace_lock);
4350 spa_async_resume(spa);
4353 * Override any spares and level 2 cache devices as specified by
4354 * the user, as these may have correct device names/devids, etc.
4356 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
4357 &spares, &nspares) == 0) {
4358 if (spa->spa_spares.sav_config)
4359 VERIFY(nvlist_remove(spa->spa_spares.sav_config,
4360 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0);
4362 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config,
4363 NV_UNIQUE_NAME, KM_SLEEP) == 0);
4364 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config,
4365 ZPOOL_CONFIG_SPARES, spares, nspares) == 0);
4366 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4367 spa_load_spares(spa);
4368 spa_config_exit(spa, SCL_ALL, FTAG);
4369 spa->spa_spares.sav_sync = B_TRUE;
4371 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE,
4372 &l2cache, &nl2cache) == 0) {
4373 if (spa->spa_l2cache.sav_config)
4374 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config,
4375 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0);
4377 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config,
4378 NV_UNIQUE_NAME, KM_SLEEP) == 0);
4379 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config,
4380 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0);
4381 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4382 spa_load_l2cache(spa);
4383 spa_config_exit(spa, SCL_ALL, FTAG);
4384 spa->spa_l2cache.sav_sync = B_TRUE;
4388 * Check for any removed devices.
4390 if (spa->spa_autoreplace) {
4391 spa_aux_check_removed(&spa->spa_spares);
4392 spa_aux_check_removed(&spa->spa_l2cache);
4395 if (spa_writeable(spa)) {
4397 * Update the config cache to include the newly-imported pool.
4399 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
4403 * It's possible that the pool was expanded while it was exported.
4404 * We kick off an async task to handle this for us.
4406 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND);
4408 spa_history_log_version(spa, "import");
4410 spa_event_notify(spa, NULL, ESC_ZFS_POOL_IMPORT);
4412 mutex_exit(&spa_namespace_lock);
4416 zvol_create_minors(pool);
4423 spa_tryimport(nvlist_t *tryconfig)
4425 nvlist_t *config = NULL;
4431 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname))
4434 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state))
4438 * Create and initialize the spa structure.
4440 mutex_enter(&spa_namespace_lock);
4441 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL);
4442 spa_activate(spa, FREAD);
4445 * Pass off the heavy lifting to spa_load().
4446 * Pass TRUE for mosconfig because the user-supplied config
4447 * is actually the one to trust when doing an import.
4449 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE);
4452 * If 'tryconfig' was at least parsable, return the current config.
4454 if (spa->spa_root_vdev != NULL) {
4455 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE);
4456 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME,
4458 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
4460 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP,
4461 spa->spa_uberblock.ub_timestamp) == 0);
4462 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO,
4463 spa->spa_load_info) == 0);
4466 * If the bootfs property exists on this pool then we
4467 * copy it out so that external consumers can tell which
4468 * pools are bootable.
4470 if ((!error || error == EEXIST) && spa->spa_bootfs) {
4471 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
4474 * We have to play games with the name since the
4475 * pool was opened as TRYIMPORT_NAME.
4477 if (dsl_dsobj_to_dsname(spa_name(spa),
4478 spa->spa_bootfs, tmpname) == 0) {
4480 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP);
4482 cp = strchr(tmpname, '/');
4484 (void) strlcpy(dsname, tmpname,
4487 (void) snprintf(dsname, MAXPATHLEN,
4488 "%s/%s", poolname, ++cp);
4490 VERIFY(nvlist_add_string(config,
4491 ZPOOL_CONFIG_BOOTFS, dsname) == 0);
4492 kmem_free(dsname, MAXPATHLEN);
4494 kmem_free(tmpname, MAXPATHLEN);
4498 * Add the list of hot spares and level 2 cache devices.
4500 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
4501 spa_add_spares(spa, config);
4502 spa_add_l2cache(spa, config);
4503 spa_config_exit(spa, SCL_CONFIG, FTAG);
4507 spa_deactivate(spa);
4509 mutex_exit(&spa_namespace_lock);
4515 * Pool export/destroy
4517 * The act of destroying or exporting a pool is very simple. We make sure there
4518 * is no more pending I/O and any references to the pool are gone. Then, we
4519 * update the pool state and sync all the labels to disk, removing the
4520 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
4521 * we don't sync the labels or remove the configuration cache.
4524 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig,
4525 boolean_t force, boolean_t hardforce)
4532 if (!(spa_mode_global & FWRITE))
4533 return (SET_ERROR(EROFS));
4535 mutex_enter(&spa_namespace_lock);
4536 if ((spa = spa_lookup(pool)) == NULL) {
4537 mutex_exit(&spa_namespace_lock);
4538 return (SET_ERROR(ENOENT));
4542 * Put a hold on the pool, drop the namespace lock, stop async tasks,
4543 * reacquire the namespace lock, and see if we can export.
4545 spa_open_ref(spa, FTAG);
4546 mutex_exit(&spa_namespace_lock);
4547 spa_async_suspend(spa);
4548 mutex_enter(&spa_namespace_lock);
4549 spa_close(spa, FTAG);
4552 * The pool will be in core if it's openable,
4553 * in which case we can modify its state.
4555 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) {
4557 * Objsets may be open only because they're dirty, so we
4558 * have to force it to sync before checking spa_refcnt.
4560 txg_wait_synced(spa->spa_dsl_pool, 0);
4561 spa_evicting_os_wait(spa);
4564 * A pool cannot be exported or destroyed if there are active
4565 * references. If we are resetting a pool, allow references by
4566 * fault injection handlers.
4568 if (!spa_refcount_zero(spa) ||
4569 (spa->spa_inject_ref != 0 &&
4570 new_state != POOL_STATE_UNINITIALIZED)) {
4571 spa_async_resume(spa);
4572 mutex_exit(&spa_namespace_lock);
4573 return (SET_ERROR(EBUSY));
4577 * A pool cannot be exported if it has an active shared spare.
4578 * This is to prevent other pools stealing the active spare
4579 * from an exported pool. At user's own will, such pool can
4580 * be forcedly exported.
4582 if (!force && new_state == POOL_STATE_EXPORTED &&
4583 spa_has_active_shared_spare(spa)) {
4584 spa_async_resume(spa);
4585 mutex_exit(&spa_namespace_lock);
4586 return (SET_ERROR(EXDEV));
4590 * We want this to be reflected on every label,
4591 * so mark them all dirty. spa_unload() will do the
4592 * final sync that pushes these changes out.
4594 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) {
4595 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
4596 spa->spa_state = new_state;
4597 spa->spa_final_txg = spa_last_synced_txg(spa) +
4599 vdev_config_dirty(spa->spa_root_vdev);
4600 spa_config_exit(spa, SCL_ALL, FTAG);
4604 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY);
4606 if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
4608 spa_deactivate(spa);
4611 if (oldconfig && spa->spa_config)
4612 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0);
4614 if (new_state != POOL_STATE_UNINITIALIZED) {
4616 spa_config_sync(spa, B_TRUE, B_TRUE);
4619 mutex_exit(&spa_namespace_lock);
4625 * Destroy a storage pool.
4628 spa_destroy(char *pool)
4630 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL,
4635 * Export a storage pool.
4638 spa_export(char *pool, nvlist_t **oldconfig, boolean_t force,
4639 boolean_t hardforce)
4641 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig,
4646 * Similar to spa_export(), this unloads the spa_t without actually removing it
4647 * from the namespace in any way.
4650 spa_reset(char *pool)
4652 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL,
4657 * ==========================================================================
4658 * Device manipulation
4659 * ==========================================================================
4663 * Add a device to a storage pool.
4666 spa_vdev_add(spa_t *spa, nvlist_t *nvroot)
4670 vdev_t *rvd = spa->spa_root_vdev;
4672 nvlist_t **spares, **l2cache;
4673 uint_t nspares, nl2cache;
4675 ASSERT(spa_writeable(spa));
4677 txg = spa_vdev_enter(spa);
4679 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0,
4680 VDEV_ALLOC_ADD)) != 0)
4681 return (spa_vdev_exit(spa, NULL, txg, error));
4683 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */
4685 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares,
4689 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache,
4693 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0)
4694 return (spa_vdev_exit(spa, vd, txg, EINVAL));
4696 if (vd->vdev_children != 0 &&
4697 (error = vdev_create(vd, txg, B_FALSE)) != 0)
4698 return (spa_vdev_exit(spa, vd, txg, error));
4701 * We must validate the spares and l2cache devices after checking the
4702 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
4704 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0)
4705 return (spa_vdev_exit(spa, vd, txg, error));
4708 * Transfer each new top-level vdev from vd to rvd.
4710 for (int c = 0; c < vd->vdev_children; c++) {
4713 * Set the vdev id to the first hole, if one exists.
4715 for (id = 0; id < rvd->vdev_children; id++) {
4716 if (rvd->vdev_child[id]->vdev_ishole) {
4717 vdev_free(rvd->vdev_child[id]);
4721 tvd = vd->vdev_child[c];
4722 vdev_remove_child(vd, tvd);
4724 vdev_add_child(rvd, tvd);
4725 vdev_config_dirty(tvd);
4729 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares,
4730 ZPOOL_CONFIG_SPARES);
4731 spa_load_spares(spa);
4732 spa->spa_spares.sav_sync = B_TRUE;
4735 if (nl2cache != 0) {
4736 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache,
4737 ZPOOL_CONFIG_L2CACHE);
4738 spa_load_l2cache(spa);
4739 spa->spa_l2cache.sav_sync = B_TRUE;
4743 * We have to be careful when adding new vdevs to an existing pool.
4744 * If other threads start allocating from these vdevs before we
4745 * sync the config cache, and we lose power, then upon reboot we may
4746 * fail to open the pool because there are DVAs that the config cache
4747 * can't translate. Therefore, we first add the vdevs without
4748 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
4749 * and then let spa_config_update() initialize the new metaslabs.
4751 * spa_load() checks for added-but-not-initialized vdevs, so that
4752 * if we lose power at any point in this sequence, the remaining
4753 * steps will be completed the next time we load the pool.
4755 (void) spa_vdev_exit(spa, vd, txg, 0);
4757 mutex_enter(&spa_namespace_lock);
4758 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
4759 spa_event_notify(spa, NULL, ESC_ZFS_VDEV_ADD);
4760 mutex_exit(&spa_namespace_lock);
4766 * Attach a device to a mirror. The arguments are the path to any device
4767 * in the mirror, and the nvroot for the new device. If the path specifies
4768 * a device that is not mirrored, we automatically insert the mirror vdev.
4770 * If 'replacing' is specified, the new device is intended to replace the
4771 * existing device; in this case the two devices are made into their own
4772 * mirror using the 'replacing' vdev, which is functionally identical to
4773 * the mirror vdev (it actually reuses all the same ops) but has a few
4774 * extra rules: you can't attach to it after it's been created, and upon
4775 * completion of resilvering, the first disk (the one being replaced)
4776 * is automatically detached.
4779 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing)
4781 uint64_t txg, dtl_max_txg;
4782 vdev_t *rvd = spa->spa_root_vdev;
4783 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd;
4785 char *oldvdpath, *newvdpath;
4789 ASSERT(spa_writeable(spa));
4791 txg = spa_vdev_enter(spa);
4793 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE);
4796 return (spa_vdev_exit(spa, NULL, txg, ENODEV));
4798 if (!oldvd->vdev_ops->vdev_op_leaf)
4799 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
4801 pvd = oldvd->vdev_parent;
4803 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0,
4804 VDEV_ALLOC_ATTACH)) != 0)
4805 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
4807 if (newrootvd->vdev_children != 1)
4808 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
4810 newvd = newrootvd->vdev_child[0];
4812 if (!newvd->vdev_ops->vdev_op_leaf)
4813 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL));
4815 if ((error = vdev_create(newrootvd, txg, replacing)) != 0)
4816 return (spa_vdev_exit(spa, newrootvd, txg, error));
4819 * Spares can't replace logs
4821 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare)
4822 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4826 * For attach, the only allowable parent is a mirror or the root
4829 if (pvd->vdev_ops != &vdev_mirror_ops &&
4830 pvd->vdev_ops != &vdev_root_ops)
4831 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4833 pvops = &vdev_mirror_ops;
4836 * Active hot spares can only be replaced by inactive hot
4839 if (pvd->vdev_ops == &vdev_spare_ops &&
4840 oldvd->vdev_isspare &&
4841 !spa_has_spare(spa, newvd->vdev_guid))
4842 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4845 * If the source is a hot spare, and the parent isn't already a
4846 * spare, then we want to create a new hot spare. Otherwise, we
4847 * want to create a replacing vdev. The user is not allowed to
4848 * attach to a spared vdev child unless the 'isspare' state is
4849 * the same (spare replaces spare, non-spare replaces
4852 if (pvd->vdev_ops == &vdev_replacing_ops &&
4853 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) {
4854 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4855 } else if (pvd->vdev_ops == &vdev_spare_ops &&
4856 newvd->vdev_isspare != oldvd->vdev_isspare) {
4857 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP));
4860 if (newvd->vdev_isspare)
4861 pvops = &vdev_spare_ops;
4863 pvops = &vdev_replacing_ops;
4867 * Make sure the new device is big enough.
4869 if (newvd->vdev_asize < vdev_get_min_asize(oldvd))
4870 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW));
4873 * The new device cannot have a higher alignment requirement
4874 * than the top-level vdev.
4876 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift)
4877 return (spa_vdev_exit(spa, newrootvd, txg, EDOM));
4880 * If this is an in-place replacement, update oldvd's path and devid
4881 * to make it distinguishable from newvd, and unopenable from now on.
4883 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) {
4884 spa_strfree(oldvd->vdev_path);
4885 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5,
4887 (void) sprintf(oldvd->vdev_path, "%s/%s",
4888 newvd->vdev_path, "old");
4889 if (oldvd->vdev_devid != NULL) {
4890 spa_strfree(oldvd->vdev_devid);
4891 oldvd->vdev_devid = NULL;
4895 /* mark the device being resilvered */
4896 newvd->vdev_resilver_txg = txg;
4899 * If the parent is not a mirror, or if we're replacing, insert the new
4900 * mirror/replacing/spare vdev above oldvd.
4902 if (pvd->vdev_ops != pvops)
4903 pvd = vdev_add_parent(oldvd, pvops);
4905 ASSERT(pvd->vdev_top->vdev_parent == rvd);
4906 ASSERT(pvd->vdev_ops == pvops);
4907 ASSERT(oldvd->vdev_parent == pvd);
4910 * Extract the new device from its root and add it to pvd.
4912 vdev_remove_child(newrootvd, newvd);
4913 newvd->vdev_id = pvd->vdev_children;
4914 newvd->vdev_crtxg = oldvd->vdev_crtxg;
4915 vdev_add_child(pvd, newvd);
4917 tvd = newvd->vdev_top;
4918 ASSERT(pvd->vdev_top == tvd);
4919 ASSERT(tvd->vdev_parent == rvd);
4921 vdev_config_dirty(tvd);
4924 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
4925 * for any dmu_sync-ed blocks. It will propagate upward when
4926 * spa_vdev_exit() calls vdev_dtl_reassess().
4928 dtl_max_txg = txg + TXG_CONCURRENT_STATES;
4930 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL,
4931 dtl_max_txg - TXG_INITIAL);
4933 if (newvd->vdev_isspare) {
4934 spa_spare_activate(newvd);
4935 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE);
4938 oldvdpath = spa_strdup(oldvd->vdev_path);
4939 newvdpath = spa_strdup(newvd->vdev_path);
4940 newvd_isspare = newvd->vdev_isspare;
4943 * Mark newvd's DTL dirty in this txg.
4945 vdev_dirty(tvd, VDD_DTL, newvd, txg);
4948 * Schedule the resilver to restart in the future. We do this to
4949 * ensure that dmu_sync-ed blocks have been stitched into the
4950 * respective datasets.
4952 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg);
4954 if (spa->spa_bootfs)
4955 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH);
4957 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_ATTACH);
4962 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0);
4964 spa_history_log_internal(spa, "vdev attach", NULL,
4965 "%s vdev=%s %s vdev=%s",
4966 replacing && newvd_isspare ? "spare in" :
4967 replacing ? "replace" : "attach", newvdpath,
4968 replacing ? "for" : "to", oldvdpath);
4970 spa_strfree(oldvdpath);
4971 spa_strfree(newvdpath);
4977 * Detach a device from a mirror or replacing vdev.
4979 * If 'replace_done' is specified, only detach if the parent
4980 * is a replacing vdev.
4983 spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done)
4987 vdev_t *rvd = spa->spa_root_vdev;
4988 vdev_t *vd, *pvd, *cvd, *tvd;
4989 boolean_t unspare = B_FALSE;
4990 uint64_t unspare_guid = 0;
4993 ASSERT(spa_writeable(spa));
4995 txg = spa_vdev_enter(spa);
4997 vd = spa_lookup_by_guid(spa, guid, B_FALSE);
5000 return (spa_vdev_exit(spa, NULL, txg, ENODEV));
5002 if (!vd->vdev_ops->vdev_op_leaf)
5003 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
5005 pvd = vd->vdev_parent;
5008 * If the parent/child relationship is not as expected, don't do it.
5009 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
5010 * vdev that's replacing B with C. The user's intent in replacing
5011 * is to go from M(A,B) to M(A,C). If the user decides to cancel
5012 * the replace by detaching C, the expected behavior is to end up
5013 * M(A,B). But suppose that right after deciding to detach C,
5014 * the replacement of B completes. We would have M(A,C), and then
5015 * ask to detach C, which would leave us with just A -- not what
5016 * the user wanted. To prevent this, we make sure that the
5017 * parent/child relationship hasn't changed -- in this example,
5018 * that C's parent is still the replacing vdev R.
5020 if (pvd->vdev_guid != pguid && pguid != 0)
5021 return (spa_vdev_exit(spa, NULL, txg, EBUSY));
5024 * Only 'replacing' or 'spare' vdevs can be replaced.
5026 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops &&
5027 pvd->vdev_ops != &vdev_spare_ops)
5028 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
5030 ASSERT(pvd->vdev_ops != &vdev_spare_ops ||
5031 spa_version(spa) >= SPA_VERSION_SPARES);
5034 * Only mirror, replacing, and spare vdevs support detach.
5036 if (pvd->vdev_ops != &vdev_replacing_ops &&
5037 pvd->vdev_ops != &vdev_mirror_ops &&
5038 pvd->vdev_ops != &vdev_spare_ops)
5039 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP));
5042 * If this device has the only valid copy of some data,
5043 * we cannot safely detach it.
5045 if (vdev_dtl_required(vd))
5046 return (spa_vdev_exit(spa, NULL, txg, EBUSY));
5048 ASSERT(pvd->vdev_children >= 2);
5051 * If we are detaching the second disk from a replacing vdev, then
5052 * check to see if we changed the original vdev's path to have "/old"
5053 * at the end in spa_vdev_attach(). If so, undo that change now.
5055 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 &&
5056 vd->vdev_path != NULL) {
5057 size_t len = strlen(vd->vdev_path);
5059 for (int c = 0; c < pvd->vdev_children; c++) {
5060 cvd = pvd->vdev_child[c];
5062 if (cvd == vd || cvd->vdev_path == NULL)
5065 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 &&
5066 strcmp(cvd->vdev_path + len, "/old") == 0) {
5067 spa_strfree(cvd->vdev_path);
5068 cvd->vdev_path = spa_strdup(vd->vdev_path);
5075 * If we are detaching the original disk from a spare, then it implies
5076 * that the spare should become a real disk, and be removed from the
5077 * active spare list for the pool.
5079 if (pvd->vdev_ops == &vdev_spare_ops &&
5081 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare)
5085 * Erase the disk labels so the disk can be used for other things.
5086 * This must be done after all other error cases are handled,
5087 * but before we disembowel vd (so we can still do I/O to it).
5088 * But if we can't do it, don't treat the error as fatal --
5089 * it may be that the unwritability of the disk is the reason
5090 * it's being detached!
5092 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
5095 * Remove vd from its parent and compact the parent's children.
5097 vdev_remove_child(pvd, vd);
5098 vdev_compact_children(pvd);
5101 * Remember one of the remaining children so we can get tvd below.
5103 cvd = pvd->vdev_child[pvd->vdev_children - 1];
5106 * If we need to remove the remaining child from the list of hot spares,
5107 * do it now, marking the vdev as no longer a spare in the process.
5108 * We must do this before vdev_remove_parent(), because that can
5109 * change the GUID if it creates a new toplevel GUID. For a similar
5110 * reason, we must remove the spare now, in the same txg as the detach;
5111 * otherwise someone could attach a new sibling, change the GUID, and
5112 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
5115 ASSERT(cvd->vdev_isspare);
5116 spa_spare_remove(cvd);
5117 unspare_guid = cvd->vdev_guid;
5118 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE);
5119 cvd->vdev_unspare = B_TRUE;
5123 * If the parent mirror/replacing vdev only has one child,
5124 * the parent is no longer needed. Remove it from the tree.
5126 if (pvd->vdev_children == 1) {
5127 if (pvd->vdev_ops == &vdev_spare_ops)
5128 cvd->vdev_unspare = B_FALSE;
5129 vdev_remove_parent(cvd);
5134 * We don't set tvd until now because the parent we just removed
5135 * may have been the previous top-level vdev.
5137 tvd = cvd->vdev_top;
5138 ASSERT(tvd->vdev_parent == rvd);
5141 * Reevaluate the parent vdev state.
5143 vdev_propagate_state(cvd);
5146 * If the 'autoexpand' property is set on the pool then automatically
5147 * try to expand the size of the pool. For example if the device we
5148 * just detached was smaller than the others, it may be possible to
5149 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
5150 * first so that we can obtain the updated sizes of the leaf vdevs.
5152 if (spa->spa_autoexpand) {
5154 vdev_expand(tvd, txg);
5157 vdev_config_dirty(tvd);
5160 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
5161 * vd->vdev_detached is set and free vd's DTL object in syncing context.
5162 * But first make sure we're not on any *other* txg's DTL list, to
5163 * prevent vd from being accessed after it's freed.
5165 vdpath = spa_strdup(vd->vdev_path);
5166 for (int t = 0; t < TXG_SIZE; t++)
5167 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t);
5168 vd->vdev_detached = B_TRUE;
5169 vdev_dirty(tvd, VDD_DTL, vd, txg);
5171 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE);
5173 /* hang on to the spa before we release the lock */
5174 spa_open_ref(spa, FTAG);
5176 error = spa_vdev_exit(spa, vd, txg, 0);
5178 spa_history_log_internal(spa, "detach", NULL,
5180 spa_strfree(vdpath);
5183 * If this was the removal of the original device in a hot spare vdev,
5184 * then we want to go through and remove the device from the hot spare
5185 * list of every other pool.
5188 spa_t *altspa = NULL;
5190 mutex_enter(&spa_namespace_lock);
5191 while ((altspa = spa_next(altspa)) != NULL) {
5192 if (altspa->spa_state != POOL_STATE_ACTIVE ||
5196 spa_open_ref(altspa, FTAG);
5197 mutex_exit(&spa_namespace_lock);
5198 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE);
5199 mutex_enter(&spa_namespace_lock);
5200 spa_close(altspa, FTAG);
5202 mutex_exit(&spa_namespace_lock);
5204 /* search the rest of the vdevs for spares to remove */
5205 spa_vdev_resilver_done(spa);
5208 /* all done with the spa; OK to release */
5209 mutex_enter(&spa_namespace_lock);
5210 spa_close(spa, FTAG);
5211 mutex_exit(&spa_namespace_lock);
5217 * Split a set of devices from their mirrors, and create a new pool from them.
5220 spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config,
5221 nvlist_t *props, boolean_t exp)
5224 uint64_t txg, *glist;
5226 uint_t c, children, lastlog;
5227 nvlist_t **child, *nvl, *tmp;
5229 char *altroot = NULL;
5230 vdev_t *rvd, **vml = NULL; /* vdev modify list */
5231 boolean_t activate_slog;
5233 ASSERT(spa_writeable(spa));
5235 txg = spa_vdev_enter(spa);
5237 /* clear the log and flush everything up to now */
5238 activate_slog = spa_passivate_log(spa);
5239 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
5240 error = spa_offline_log(spa);
5241 txg = spa_vdev_config_enter(spa);
5244 spa_activate_log(spa);
5247 return (spa_vdev_exit(spa, NULL, txg, error));
5249 /* check new spa name before going any further */
5250 if (spa_lookup(newname) != NULL)
5251 return (spa_vdev_exit(spa, NULL, txg, EEXIST));
5254 * scan through all the children to ensure they're all mirrors
5256 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 ||
5257 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child,
5259 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
5261 /* first, check to ensure we've got the right child count */
5262 rvd = spa->spa_root_vdev;
5264 for (c = 0; c < rvd->vdev_children; c++) {
5265 vdev_t *vd = rvd->vdev_child[c];
5267 /* don't count the holes & logs as children */
5268 if (vd->vdev_islog || vd->vdev_ishole) {
5276 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children))
5277 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
5279 /* next, ensure no spare or cache devices are part of the split */
5280 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 ||
5281 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0)
5282 return (spa_vdev_exit(spa, NULL, txg, EINVAL));
5284 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP);
5285 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP);
5287 /* then, loop over each vdev and validate it */
5288 for (c = 0; c < children; c++) {
5289 uint64_t is_hole = 0;
5291 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE,
5295 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole ||
5296 spa->spa_root_vdev->vdev_child[c]->vdev_islog) {
5299 error = SET_ERROR(EINVAL);
5304 /* which disk is going to be split? */
5305 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID,
5307 error = SET_ERROR(EINVAL);
5311 /* look it up in the spa */
5312 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE);
5313 if (vml[c] == NULL) {
5314 error = SET_ERROR(ENODEV);
5318 /* make sure there's nothing stopping the split */
5319 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops ||
5320 vml[c]->vdev_islog ||
5321 vml[c]->vdev_ishole ||
5322 vml[c]->vdev_isspare ||
5323 vml[c]->vdev_isl2cache ||
5324 !vdev_writeable(vml[c]) ||
5325 vml[c]->vdev_children != 0 ||
5326 vml[c]->vdev_state != VDEV_STATE_HEALTHY ||
5327 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) {
5328 error = SET_ERROR(EINVAL);
5332 if (vdev_dtl_required(vml[c])) {
5333 error = SET_ERROR(EBUSY);
5337 /* we need certain info from the top level */
5338 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY,
5339 vml[c]->vdev_top->vdev_ms_array) == 0);
5340 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT,
5341 vml[c]->vdev_top->vdev_ms_shift) == 0);
5342 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE,
5343 vml[c]->vdev_top->vdev_asize) == 0);
5344 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT,
5345 vml[c]->vdev_top->vdev_ashift) == 0);
5349 kmem_free(vml, children * sizeof (vdev_t *));
5350 kmem_free(glist, children * sizeof (uint64_t));
5351 return (spa_vdev_exit(spa, NULL, txg, error));
5354 /* stop writers from using the disks */
5355 for (c = 0; c < children; c++) {
5357 vml[c]->vdev_offline = B_TRUE;
5359 vdev_reopen(spa->spa_root_vdev);
5362 * Temporarily record the splitting vdevs in the spa config. This
5363 * will disappear once the config is regenerated.
5365 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0);
5366 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST,
5367 glist, children) == 0);
5368 kmem_free(glist, children * sizeof (uint64_t));
5370 mutex_enter(&spa->spa_props_lock);
5371 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT,
5373 mutex_exit(&spa->spa_props_lock);
5374 spa->spa_config_splitting = nvl;
5375 vdev_config_dirty(spa->spa_root_vdev);
5377 /* configure and create the new pool */
5378 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0);
5379 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE,
5380 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0);
5381 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION,
5382 spa_version(spa)) == 0);
5383 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG,
5384 spa->spa_config_txg) == 0);
5385 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID,
5386 spa_generate_guid(NULL)) == 0);
5387 (void) nvlist_lookup_string(props,
5388 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot);
5390 /* add the new pool to the namespace */
5391 newspa = spa_add(newname, config, altroot);
5392 newspa->spa_config_txg = spa->spa_config_txg;
5393 spa_set_log_state(newspa, SPA_LOG_CLEAR);
5395 /* release the spa config lock, retaining the namespace lock */
5396 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
5398 if (zio_injection_enabled)
5399 zio_handle_panic_injection(spa, FTAG, 1);
5401 spa_activate(newspa, spa_mode_global);
5402 spa_async_suspend(newspa);
5405 /* mark that we are creating new spa by splitting */
5406 newspa->spa_splitting_newspa = B_TRUE;
5408 /* create the new pool from the disks of the original pool */
5409 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE);
5411 newspa->spa_splitting_newspa = B_FALSE;
5416 /* if that worked, generate a real config for the new pool */
5417 if (newspa->spa_root_vdev != NULL) {
5418 VERIFY(nvlist_alloc(&newspa->spa_config_splitting,
5419 NV_UNIQUE_NAME, KM_SLEEP) == 0);
5420 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting,
5421 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0);
5422 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL,
5427 if (props != NULL) {
5428 spa_configfile_set(newspa, props, B_FALSE);
5429 error = spa_prop_set(newspa, props);
5434 /* flush everything */
5435 txg = spa_vdev_config_enter(newspa);
5436 vdev_config_dirty(newspa->spa_root_vdev);
5437 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG);
5439 if (zio_injection_enabled)
5440 zio_handle_panic_injection(spa, FTAG, 2);
5442 spa_async_resume(newspa);
5444 /* finally, update the original pool's config */
5445 txg = spa_vdev_config_enter(spa);
5446 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir);
5447 error = dmu_tx_assign(tx, TXG_WAIT);
5450 for (c = 0; c < children; c++) {
5451 if (vml[c] != NULL) {
5454 spa_history_log_internal(spa, "detach", tx,
5455 "vdev=%s", vml[c]->vdev_path);
5459 vdev_config_dirty(spa->spa_root_vdev);
5460 spa->spa_config_splitting = NULL;
5464 (void) spa_vdev_exit(spa, NULL, txg, 0);
5466 if (zio_injection_enabled)
5467 zio_handle_panic_injection(spa, FTAG, 3);
5469 /* split is complete; log a history record */
5470 spa_history_log_internal(newspa, "split", NULL,
5471 "from pool %s", spa_name(spa));
5473 kmem_free(vml, children * sizeof (vdev_t *));
5475 /* if we're not going to mount the filesystems in userland, export */
5477 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL,
5484 spa_deactivate(newspa);
5487 txg = spa_vdev_config_enter(spa);
5489 /* re-online all offlined disks */
5490 for (c = 0; c < children; c++) {
5492 vml[c]->vdev_offline = B_FALSE;
5494 vdev_reopen(spa->spa_root_vdev);
5496 nvlist_free(spa->spa_config_splitting);
5497 spa->spa_config_splitting = NULL;
5498 (void) spa_vdev_exit(spa, NULL, txg, error);
5500 kmem_free(vml, children * sizeof (vdev_t *));
5505 spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid)
5507 for (int i = 0; i < count; i++) {
5510 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID,
5513 if (guid == target_guid)
5521 spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count,
5522 nvlist_t *dev_to_remove)
5524 nvlist_t **newdev = NULL;
5527 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP);
5529 for (int i = 0, j = 0; i < count; i++) {
5530 if (dev[i] == dev_to_remove)
5532 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0);
5535 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0);
5536 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0);
5538 for (int i = 0; i < count - 1; i++)
5539 nvlist_free(newdev[i]);
5542 kmem_free(newdev, (count - 1) * sizeof (void *));
5546 * Evacuate the device.
5549 spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd)
5554 ASSERT(MUTEX_HELD(&spa_namespace_lock));
5555 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
5556 ASSERT(vd == vd->vdev_top);
5559 * Evacuate the device. We don't hold the config lock as writer
5560 * since we need to do I/O but we do keep the
5561 * spa_namespace_lock held. Once this completes the device
5562 * should no longer have any blocks allocated on it.
5564 if (vd->vdev_islog) {
5565 if (vd->vdev_stat.vs_alloc != 0)
5566 error = spa_offline_log(spa);
5568 error = SET_ERROR(ENOTSUP);
5575 * The evacuation succeeded. Remove any remaining MOS metadata
5576 * associated with this vdev, and wait for these changes to sync.
5578 ASSERT0(vd->vdev_stat.vs_alloc);
5579 txg = spa_vdev_config_enter(spa);
5580 vd->vdev_removing = B_TRUE;
5581 vdev_dirty_leaves(vd, VDD_DTL, txg);
5582 vdev_config_dirty(vd);
5583 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG);
5589 * Complete the removal by cleaning up the namespace.
5592 spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd)
5594 vdev_t *rvd = spa->spa_root_vdev;
5595 uint64_t id = vd->vdev_id;
5596 boolean_t last_vdev = (id == (rvd->vdev_children - 1));
5598 ASSERT(MUTEX_HELD(&spa_namespace_lock));
5599 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL);
5600 ASSERT(vd == vd->vdev_top);
5603 * Only remove any devices which are empty.
5605 if (vd->vdev_stat.vs_alloc != 0)
5608 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE);
5610 if (list_link_active(&vd->vdev_state_dirty_node))
5611 vdev_state_clean(vd);
5612 if (list_link_active(&vd->vdev_config_dirty_node))
5613 vdev_config_clean(vd);
5618 vdev_compact_children(rvd);
5620 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops);
5621 vdev_add_child(rvd, vd);
5623 vdev_config_dirty(rvd);
5626 * Reassess the health of our root vdev.
5632 * Remove a device from the pool -
5634 * Removing a device from the vdev namespace requires several steps
5635 * and can take a significant amount of time. As a result we use
5636 * the spa_vdev_config_[enter/exit] functions which allow us to
5637 * grab and release the spa_config_lock while still holding the namespace
5638 * lock. During each step the configuration is synced out.
5640 * Currently, this supports removing only hot spares, slogs, and level 2 ARC
5644 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare)
5647 sysevent_t *ev = NULL;
5648 metaslab_group_t *mg;
5649 nvlist_t **spares, **l2cache, *nv;
5651 uint_t nspares, nl2cache;
5653 boolean_t locked = MUTEX_HELD(&spa_namespace_lock);
5655 ASSERT(spa_writeable(spa));
5658 txg = spa_vdev_enter(spa);
5660 vd = spa_lookup_by_guid(spa, guid, B_FALSE);
5662 if (spa->spa_spares.sav_vdevs != NULL &&
5663 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config,
5664 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 &&
5665 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) {
5667 * Only remove the hot spare if it's not currently in use
5670 if (vd == NULL || unspare) {
5672 vd = spa_lookup_by_guid(spa, guid, B_TRUE);
5673 ev = spa_event_create(spa, vd, ESC_ZFS_VDEV_REMOVE_AUX);
5674 spa_vdev_remove_aux(spa->spa_spares.sav_config,
5675 ZPOOL_CONFIG_SPARES, spares, nspares, nv);
5676 spa_load_spares(spa);
5677 spa->spa_spares.sav_sync = B_TRUE;
5679 error = SET_ERROR(EBUSY);
5681 } else if (spa->spa_l2cache.sav_vdevs != NULL &&
5682 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config,
5683 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 &&
5684 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) {
5686 * Cache devices can always be removed.
5688 vd = spa_lookup_by_guid(spa, guid, B_TRUE);
5689 ev = spa_event_create(spa, vd, ESC_ZFS_VDEV_REMOVE_AUX);
5690 spa_vdev_remove_aux(spa->spa_l2cache.sav_config,
5691 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv);
5692 spa_load_l2cache(spa);
5693 spa->spa_l2cache.sav_sync = B_TRUE;
5694 } else if (vd != NULL && vd->vdev_islog) {
5696 ASSERT(vd == vd->vdev_top);
5701 * Stop allocating from this vdev.
5703 metaslab_group_passivate(mg);
5706 * Wait for the youngest allocations and frees to sync,
5707 * and then wait for the deferral of those frees to finish.
5709 spa_vdev_config_exit(spa, NULL,
5710 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG);
5713 * Attempt to evacuate the vdev.
5715 error = spa_vdev_remove_evacuate(spa, vd);
5717 txg = spa_vdev_config_enter(spa);
5720 * If we couldn't evacuate the vdev, unwind.
5723 metaslab_group_activate(mg);
5724 return (spa_vdev_exit(spa, NULL, txg, error));
5728 * Clean up the vdev namespace.
5730 ev = spa_event_create(spa, vd, ESC_ZFS_VDEV_REMOVE_DEV);
5731 spa_vdev_remove_from_namespace(spa, vd);
5733 } else if (vd != NULL) {
5735 * Normal vdevs cannot be removed (yet).
5737 error = SET_ERROR(ENOTSUP);
5740 * There is no vdev of any kind with the specified guid.
5742 error = SET_ERROR(ENOENT);
5746 error = spa_vdev_exit(spa, NULL, txg, error);
5755 * Find any device that's done replacing, or a vdev marked 'unspare' that's
5756 * currently spared, so we can detach it.
5759 spa_vdev_resilver_done_hunt(vdev_t *vd)
5761 vdev_t *newvd, *oldvd;
5763 for (int c = 0; c < vd->vdev_children; c++) {
5764 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]);
5770 * Check for a completed replacement. We always consider the first
5771 * vdev in the list to be the oldest vdev, and the last one to be
5772 * the newest (see spa_vdev_attach() for how that works). In
5773 * the case where the newest vdev is faulted, we will not automatically
5774 * remove it after a resilver completes. This is OK as it will require
5775 * user intervention to determine which disk the admin wishes to keep.
5777 if (vd->vdev_ops == &vdev_replacing_ops) {
5778 ASSERT(vd->vdev_children > 1);
5780 newvd = vd->vdev_child[vd->vdev_children - 1];
5781 oldvd = vd->vdev_child[0];
5783 if (vdev_dtl_empty(newvd, DTL_MISSING) &&
5784 vdev_dtl_empty(newvd, DTL_OUTAGE) &&
5785 !vdev_dtl_required(oldvd))
5790 * Check for a completed resilver with the 'unspare' flag set.
5792 if (vd->vdev_ops == &vdev_spare_ops) {
5793 vdev_t *first = vd->vdev_child[0];
5794 vdev_t *last = vd->vdev_child[vd->vdev_children - 1];
5796 if (last->vdev_unspare) {
5799 } else if (first->vdev_unspare) {
5806 if (oldvd != NULL &&
5807 vdev_dtl_empty(newvd, DTL_MISSING) &&
5808 vdev_dtl_empty(newvd, DTL_OUTAGE) &&
5809 !vdev_dtl_required(oldvd))
5813 * If there are more than two spares attached to a disk,
5814 * and those spares are not required, then we want to
5815 * attempt to free them up now so that they can be used
5816 * by other pools. Once we're back down to a single
5817 * disk+spare, we stop removing them.
5819 if (vd->vdev_children > 2) {
5820 newvd = vd->vdev_child[1];
5822 if (newvd->vdev_isspare && last->vdev_isspare &&
5823 vdev_dtl_empty(last, DTL_MISSING) &&
5824 vdev_dtl_empty(last, DTL_OUTAGE) &&
5825 !vdev_dtl_required(newvd))
5834 spa_vdev_resilver_done(spa_t *spa)
5836 vdev_t *vd, *pvd, *ppvd;
5837 uint64_t guid, sguid, pguid, ppguid;
5839 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
5841 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) {
5842 pvd = vd->vdev_parent;
5843 ppvd = pvd->vdev_parent;
5844 guid = vd->vdev_guid;
5845 pguid = pvd->vdev_guid;
5846 ppguid = ppvd->vdev_guid;
5849 * If we have just finished replacing a hot spared device, then
5850 * we need to detach the parent's first child (the original hot
5853 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 &&
5854 ppvd->vdev_children == 2) {
5855 ASSERT(pvd->vdev_ops == &vdev_replacing_ops);
5856 sguid = ppvd->vdev_child[1]->vdev_guid;
5858 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd));
5860 spa_config_exit(spa, SCL_ALL, FTAG);
5861 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0)
5863 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0)
5865 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
5868 spa_config_exit(spa, SCL_ALL, FTAG);
5872 * Update the stored path or FRU for this vdev.
5875 spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value,
5879 boolean_t sync = B_FALSE;
5881 ASSERT(spa_writeable(spa));
5883 spa_vdev_state_enter(spa, SCL_ALL);
5885 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL)
5886 return (spa_vdev_state_exit(spa, NULL, ENOENT));
5888 if (!vd->vdev_ops->vdev_op_leaf)
5889 return (spa_vdev_state_exit(spa, NULL, ENOTSUP));
5892 if (strcmp(value, vd->vdev_path) != 0) {
5893 spa_strfree(vd->vdev_path);
5894 vd->vdev_path = spa_strdup(value);
5898 if (vd->vdev_fru == NULL) {
5899 vd->vdev_fru = spa_strdup(value);
5901 } else if (strcmp(value, vd->vdev_fru) != 0) {
5902 spa_strfree(vd->vdev_fru);
5903 vd->vdev_fru = spa_strdup(value);
5908 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0));
5912 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath)
5914 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE));
5918 spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru)
5920 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE));
5924 * ==========================================================================
5926 * ==========================================================================
5930 spa_scan_stop(spa_t *spa)
5932 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
5933 if (dsl_scan_resilvering(spa->spa_dsl_pool))
5934 return (SET_ERROR(EBUSY));
5935 return (dsl_scan_cancel(spa->spa_dsl_pool));
5939 spa_scan(spa_t *spa, pool_scan_func_t func)
5941 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0);
5943 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE)
5944 return (SET_ERROR(ENOTSUP));
5947 * If a resilver was requested, but there is no DTL on a
5948 * writeable leaf device, we have nothing to do.
5950 if (func == POOL_SCAN_RESILVER &&
5951 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) {
5952 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE);
5956 return (dsl_scan(spa->spa_dsl_pool, func));
5960 * ==========================================================================
5961 * SPA async task processing
5962 * ==========================================================================
5966 spa_async_remove(spa_t *spa, vdev_t *vd)
5968 if (vd->vdev_remove_wanted) {
5969 vd->vdev_remove_wanted = B_FALSE;
5970 vd->vdev_delayed_close = B_FALSE;
5971 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE);
5974 * We want to clear the stats, but we don't want to do a full
5975 * vdev_clear() as that will cause us to throw away
5976 * degraded/faulted state as well as attempt to reopen the
5977 * device, all of which is a waste.
5979 vd->vdev_stat.vs_read_errors = 0;
5980 vd->vdev_stat.vs_write_errors = 0;
5981 vd->vdev_stat.vs_checksum_errors = 0;
5983 vdev_state_dirty(vd->vdev_top);
5984 /* Tell userspace that the vdev is gone. */
5985 zfs_post_remove(spa, vd);
5988 for (int c = 0; c < vd->vdev_children; c++)
5989 spa_async_remove(spa, vd->vdev_child[c]);
5993 spa_async_probe(spa_t *spa, vdev_t *vd)
5995 if (vd->vdev_probe_wanted) {
5996 vd->vdev_probe_wanted = B_FALSE;
5997 vdev_reopen(vd); /* vdev_open() does the actual probe */
6000 for (int c = 0; c < vd->vdev_children; c++)
6001 spa_async_probe(spa, vd->vdev_child[c]);
6005 spa_async_autoexpand(spa_t *spa, vdev_t *vd)
6011 if (!spa->spa_autoexpand)
6014 for (int c = 0; c < vd->vdev_children; c++) {
6015 vdev_t *cvd = vd->vdev_child[c];
6016 spa_async_autoexpand(spa, cvd);
6019 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL)
6022 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP);
6023 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath);
6025 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0);
6026 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0);
6028 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS,
6029 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP);
6032 kmem_free(physpath, MAXPATHLEN);
6036 spa_async_thread(void *arg)
6041 ASSERT(spa->spa_sync_on);
6043 mutex_enter(&spa->spa_async_lock);
6044 tasks = spa->spa_async_tasks;
6045 spa->spa_async_tasks &= SPA_ASYNC_REMOVE;
6046 mutex_exit(&spa->spa_async_lock);
6049 * See if the config needs to be updated.
6051 if (tasks & SPA_ASYNC_CONFIG_UPDATE) {
6052 uint64_t old_space, new_space;
6054 mutex_enter(&spa_namespace_lock);
6055 old_space = metaslab_class_get_space(spa_normal_class(spa));
6056 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL);
6057 new_space = metaslab_class_get_space(spa_normal_class(spa));
6058 mutex_exit(&spa_namespace_lock);
6061 * If the pool grew as a result of the config update,
6062 * then log an internal history event.
6064 if (new_space != old_space) {
6065 spa_history_log_internal(spa, "vdev online", NULL,
6066 "pool '%s' size: %llu(+%llu)",
6067 spa_name(spa), new_space, new_space - old_space);
6071 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) {
6072 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
6073 spa_async_autoexpand(spa, spa->spa_root_vdev);
6074 spa_config_exit(spa, SCL_CONFIG, FTAG);
6078 * See if any devices need to be probed.
6080 if (tasks & SPA_ASYNC_PROBE) {
6081 spa_vdev_state_enter(spa, SCL_NONE);
6082 spa_async_probe(spa, spa->spa_root_vdev);
6083 (void) spa_vdev_state_exit(spa, NULL, 0);
6087 * If any devices are done replacing, detach them.
6089 if (tasks & SPA_ASYNC_RESILVER_DONE)
6090 spa_vdev_resilver_done(spa);
6093 * Kick off a resilver.
6095 if (tasks & SPA_ASYNC_RESILVER)
6096 dsl_resilver_restart(spa->spa_dsl_pool, 0);
6099 * Let the world know that we're done.
6101 mutex_enter(&spa->spa_async_lock);
6102 spa->spa_async_thread = NULL;
6103 cv_broadcast(&spa->spa_async_cv);
6104 mutex_exit(&spa->spa_async_lock);
6109 spa_async_thread_vd(void *arg)
6114 ASSERT(spa->spa_sync_on);
6116 mutex_enter(&spa->spa_async_lock);
6117 tasks = spa->spa_async_tasks;
6119 spa->spa_async_tasks &= ~SPA_ASYNC_REMOVE;
6120 mutex_exit(&spa->spa_async_lock);
6123 * See if any devices need to be marked REMOVED.
6125 if (tasks & SPA_ASYNC_REMOVE) {
6126 spa_vdev_state_enter(spa, SCL_NONE);
6127 spa_async_remove(spa, spa->spa_root_vdev);
6128 for (int i = 0; i < spa->spa_l2cache.sav_count; i++)
6129 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]);
6130 for (int i = 0; i < spa->spa_spares.sav_count; i++)
6131 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]);
6132 (void) spa_vdev_state_exit(spa, NULL, 0);
6136 * Let the world know that we're done.
6138 mutex_enter(&spa->spa_async_lock);
6139 tasks = spa->spa_async_tasks;
6140 if ((tasks & SPA_ASYNC_REMOVE) != 0)
6142 spa->spa_async_thread_vd = NULL;
6143 cv_broadcast(&spa->spa_async_cv);
6144 mutex_exit(&spa->spa_async_lock);
6149 spa_async_suspend(spa_t *spa)
6151 mutex_enter(&spa->spa_async_lock);
6152 spa->spa_async_suspended++;
6153 while (spa->spa_async_thread != NULL &&
6154 spa->spa_async_thread_vd != NULL)
6155 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock);
6156 mutex_exit(&spa->spa_async_lock);
6160 spa_async_resume(spa_t *spa)
6162 mutex_enter(&spa->spa_async_lock);
6163 ASSERT(spa->spa_async_suspended != 0);
6164 spa->spa_async_suspended--;
6165 mutex_exit(&spa->spa_async_lock);
6169 spa_async_tasks_pending(spa_t *spa)
6171 uint_t non_config_tasks;
6173 boolean_t config_task_suspended;
6175 non_config_tasks = spa->spa_async_tasks & ~(SPA_ASYNC_CONFIG_UPDATE |
6177 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE;
6178 if (spa->spa_ccw_fail_time == 0) {
6179 config_task_suspended = B_FALSE;
6181 config_task_suspended =
6182 (gethrtime() - spa->spa_ccw_fail_time) <
6183 (zfs_ccw_retry_interval * NANOSEC);
6186 return (non_config_tasks || (config_task && !config_task_suspended));
6190 spa_async_dispatch(spa_t *spa)
6192 mutex_enter(&spa->spa_async_lock);
6193 if (spa_async_tasks_pending(spa) &&
6194 !spa->spa_async_suspended &&
6195 spa->spa_async_thread == NULL &&
6197 spa->spa_async_thread = thread_create(NULL, 0,
6198 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri);
6199 mutex_exit(&spa->spa_async_lock);
6203 spa_async_dispatch_vd(spa_t *spa)
6205 mutex_enter(&spa->spa_async_lock);
6206 if ((spa->spa_async_tasks & SPA_ASYNC_REMOVE) != 0 &&
6207 !spa->spa_async_suspended &&
6208 spa->spa_async_thread_vd == NULL &&
6210 spa->spa_async_thread_vd = thread_create(NULL, 0,
6211 spa_async_thread_vd, spa, 0, &p0, TS_RUN, maxclsyspri);
6212 mutex_exit(&spa->spa_async_lock);
6216 spa_async_request(spa_t *spa, int task)
6218 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task);
6219 mutex_enter(&spa->spa_async_lock);
6220 spa->spa_async_tasks |= task;
6221 mutex_exit(&spa->spa_async_lock);
6222 spa_async_dispatch_vd(spa);
6226 * ==========================================================================
6227 * SPA syncing routines
6228 * ==========================================================================
6232 bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
6235 bpobj_enqueue(bpo, bp, tx);
6240 spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx)
6244 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp,
6245 BP_GET_PSIZE(bp), zio->io_flags));
6250 * Note: this simple function is not inlined to make it easier to dtrace the
6251 * amount of time spent syncing frees.
6254 spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx)
6256 zio_t *zio = zio_root(spa, NULL, NULL, 0);
6257 bplist_iterate(bpl, spa_free_sync_cb, zio, tx);
6258 VERIFY(zio_wait(zio) == 0);
6262 * Note: this simple function is not inlined to make it easier to dtrace the
6263 * amount of time spent syncing deferred frees.
6266 spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx)
6268 zio_t *zio = zio_root(spa, NULL, NULL, 0);
6269 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj,
6270 spa_free_sync_cb, zio, tx), ==, 0);
6271 VERIFY0(zio_wait(zio));
6276 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx)
6278 char *packed = NULL;
6283 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0);
6286 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
6287 * information. This avoids the dmu_buf_will_dirty() path and
6288 * saves us a pre-read to get data we don't actually care about.
6290 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE);
6291 packed = kmem_alloc(bufsize, KM_SLEEP);
6293 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR,
6295 bzero(packed + nvsize, bufsize - nvsize);
6297 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx);
6299 kmem_free(packed, bufsize);
6301 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db));
6302 dmu_buf_will_dirty(db, tx);
6303 *(uint64_t *)db->db_data = nvsize;
6304 dmu_buf_rele(db, FTAG);
6308 spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx,
6309 const char *config, const char *entry)
6319 * Update the MOS nvlist describing the list of available devices.
6320 * spa_validate_aux() will have already made sure this nvlist is
6321 * valid and the vdevs are labeled appropriately.
6323 if (sav->sav_object == 0) {
6324 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset,
6325 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE,
6326 sizeof (uint64_t), tx);
6327 VERIFY(zap_update(spa->spa_meta_objset,
6328 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1,
6329 &sav->sav_object, tx) == 0);
6332 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
6333 if (sav->sav_count == 0) {
6334 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0);
6336 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP);
6337 for (i = 0; i < sav->sav_count; i++)
6338 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i],
6339 B_FALSE, VDEV_CONFIG_L2CACHE);
6340 VERIFY(nvlist_add_nvlist_array(nvroot, config, list,
6341 sav->sav_count) == 0);
6342 for (i = 0; i < sav->sav_count; i++)
6343 nvlist_free(list[i]);
6344 kmem_free(list, sav->sav_count * sizeof (void *));
6347 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx);
6348 nvlist_free(nvroot);
6350 sav->sav_sync = B_FALSE;
6354 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx)
6358 if (list_is_empty(&spa->spa_config_dirty_list))
6361 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
6363 config = spa_config_generate(spa, spa->spa_root_vdev,
6364 dmu_tx_get_txg(tx), B_FALSE);
6367 * If we're upgrading the spa version then make sure that
6368 * the config object gets updated with the correct version.
6370 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version)
6371 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION,
6372 spa->spa_uberblock.ub_version);
6374 spa_config_exit(spa, SCL_STATE, FTAG);
6376 nvlist_free(spa->spa_config_syncing);
6377 spa->spa_config_syncing = config;
6379 spa_sync_nvlist(spa, spa->spa_config_object, config, tx);
6383 spa_sync_version(void *arg, dmu_tx_t *tx)
6385 uint64_t *versionp = arg;
6386 uint64_t version = *versionp;
6387 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
6390 * Setting the version is special cased when first creating the pool.
6392 ASSERT(tx->tx_txg != TXG_INITIAL);
6394 ASSERT(SPA_VERSION_IS_SUPPORTED(version));
6395 ASSERT(version >= spa_version(spa));
6397 spa->spa_uberblock.ub_version = version;
6398 vdev_config_dirty(spa->spa_root_vdev);
6399 spa_history_log_internal(spa, "set", tx, "version=%lld", version);
6403 * Set zpool properties.
6406 spa_sync_props(void *arg, dmu_tx_t *tx)
6408 nvlist_t *nvp = arg;
6409 spa_t *spa = dmu_tx_pool(tx)->dp_spa;
6410 objset_t *mos = spa->spa_meta_objset;
6411 nvpair_t *elem = NULL;
6413 mutex_enter(&spa->spa_props_lock);
6415 while ((elem = nvlist_next_nvpair(nvp, elem))) {
6417 char *strval, *fname;
6419 const char *propname;
6420 zprop_type_t proptype;
6423 switch (prop = zpool_name_to_prop(nvpair_name(elem))) {
6426 * We checked this earlier in spa_prop_validate().
6428 ASSERT(zpool_prop_feature(nvpair_name(elem)));
6430 fname = strchr(nvpair_name(elem), '@') + 1;
6431 VERIFY0(zfeature_lookup_name(fname, &fid));
6433 spa_feature_enable(spa, fid, tx);
6434 spa_history_log_internal(spa, "set", tx,
6435 "%s=enabled", nvpair_name(elem));
6438 case ZPOOL_PROP_VERSION:
6439 intval = fnvpair_value_uint64(elem);
6441 * The version is synced seperatly before other
6442 * properties and should be correct by now.
6444 ASSERT3U(spa_version(spa), >=, intval);
6447 case ZPOOL_PROP_ALTROOT:
6449 * 'altroot' is a non-persistent property. It should
6450 * have been set temporarily at creation or import time.
6452 ASSERT(spa->spa_root != NULL);
6455 case ZPOOL_PROP_READONLY:
6456 case ZPOOL_PROP_CACHEFILE:
6458 * 'readonly' and 'cachefile' are also non-persisitent
6462 case ZPOOL_PROP_COMMENT:
6463 strval = fnvpair_value_string(elem);
6464 if (spa->spa_comment != NULL)
6465 spa_strfree(spa->spa_comment);
6466 spa->spa_comment = spa_strdup(strval);
6468 * We need to dirty the configuration on all the vdevs
6469 * so that their labels get updated. It's unnecessary
6470 * to do this for pool creation since the vdev's
6471 * configuratoin has already been dirtied.
6473 if (tx->tx_txg != TXG_INITIAL)
6474 vdev_config_dirty(spa->spa_root_vdev);
6475 spa_history_log_internal(spa, "set", tx,
6476 "%s=%s", nvpair_name(elem), strval);
6480 * Set pool property values in the poolprops mos object.
6482 if (spa->spa_pool_props_object == 0) {
6483 spa->spa_pool_props_object =
6484 zap_create_link(mos, DMU_OT_POOL_PROPS,
6485 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS,
6489 /* normalize the property name */
6490 propname = zpool_prop_to_name(prop);
6491 proptype = zpool_prop_get_type(prop);
6493 if (nvpair_type(elem) == DATA_TYPE_STRING) {
6494 ASSERT(proptype == PROP_TYPE_STRING);
6495 strval = fnvpair_value_string(elem);
6496 VERIFY0(zap_update(mos,
6497 spa->spa_pool_props_object, propname,
6498 1, strlen(strval) + 1, strval, tx));
6499 spa_history_log_internal(spa, "set", tx,
6500 "%s=%s", nvpair_name(elem), strval);
6501 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) {
6502 intval = fnvpair_value_uint64(elem);
6504 if (proptype == PROP_TYPE_INDEX) {
6506 VERIFY0(zpool_prop_index_to_string(
6507 prop, intval, &unused));
6509 VERIFY0(zap_update(mos,
6510 spa->spa_pool_props_object, propname,
6511 8, 1, &intval, tx));
6512 spa_history_log_internal(spa, "set", tx,
6513 "%s=%lld", nvpair_name(elem), intval);
6515 ASSERT(0); /* not allowed */
6519 case ZPOOL_PROP_DELEGATION:
6520 spa->spa_delegation = intval;
6522 case ZPOOL_PROP_BOOTFS:
6523 spa->spa_bootfs = intval;
6525 case ZPOOL_PROP_FAILUREMODE:
6526 spa->spa_failmode = intval;
6528 case ZPOOL_PROP_AUTOEXPAND:
6529 spa->spa_autoexpand = intval;
6530 if (tx->tx_txg != TXG_INITIAL)
6531 spa_async_request(spa,
6532 SPA_ASYNC_AUTOEXPAND);
6534 case ZPOOL_PROP_DEDUPDITTO:
6535 spa->spa_dedup_ditto = intval;
6544 mutex_exit(&spa->spa_props_lock);
6548 * Perform one-time upgrade on-disk changes. spa_version() does not
6549 * reflect the new version this txg, so there must be no changes this
6550 * txg to anything that the upgrade code depends on after it executes.
6551 * Therefore this must be called after dsl_pool_sync() does the sync
6555 spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx)
6557 dsl_pool_t *dp = spa->spa_dsl_pool;
6559 ASSERT(spa->spa_sync_pass == 1);
6561 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG);
6563 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN &&
6564 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) {
6565 dsl_pool_create_origin(dp, tx);
6567 /* Keeping the origin open increases spa_minref */
6568 spa->spa_minref += 3;
6571 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES &&
6572 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) {
6573 dsl_pool_upgrade_clones(dp, tx);
6576 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES &&
6577 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) {
6578 dsl_pool_upgrade_dir_clones(dp, tx);
6580 /* Keeping the freedir open increases spa_minref */
6581 spa->spa_minref += 3;
6584 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES &&
6585 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) {
6586 spa_feature_create_zap_objects(spa, tx);
6590 * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable
6591 * when possibility to use lz4 compression for metadata was added
6592 * Old pools that have this feature enabled must be upgraded to have
6593 * this feature active
6595 if (spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) {
6596 boolean_t lz4_en = spa_feature_is_enabled(spa,
6597 SPA_FEATURE_LZ4_COMPRESS);
6598 boolean_t lz4_ac = spa_feature_is_active(spa,
6599 SPA_FEATURE_LZ4_COMPRESS);
6601 if (lz4_en && !lz4_ac)
6602 spa_feature_incr(spa, SPA_FEATURE_LZ4_COMPRESS, tx);
6606 * If we haven't written the salt, do so now. Note that the
6607 * feature may not be activated yet, but that's fine since
6608 * the presence of this ZAP entry is backwards compatible.
6610 if (zap_contains(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
6611 DMU_POOL_CHECKSUM_SALT) == ENOENT) {
6612 VERIFY0(zap_add(spa->spa_meta_objset,
6613 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CHECKSUM_SALT, 1,
6614 sizeof (spa->spa_cksum_salt.zcs_bytes),
6615 spa->spa_cksum_salt.zcs_bytes, tx));
6618 rrw_exit(&dp->dp_config_rwlock, FTAG);
6622 * Sync the specified transaction group. New blocks may be dirtied as
6623 * part of the process, so we iterate until it converges.
6626 spa_sync(spa_t *spa, uint64_t txg)
6628 dsl_pool_t *dp = spa->spa_dsl_pool;
6629 objset_t *mos = spa->spa_meta_objset;
6630 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK];
6631 vdev_t *rvd = spa->spa_root_vdev;
6635 uint32_t max_queue_depth = zfs_vdev_async_write_max_active *
6636 zfs_vdev_queue_depth_pct / 100;
6638 VERIFY(spa_writeable(spa));
6641 * Lock out configuration changes.
6643 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER);
6645 spa->spa_syncing_txg = txg;
6646 spa->spa_sync_pass = 0;
6648 mutex_enter(&spa->spa_alloc_lock);
6649 VERIFY0(avl_numnodes(&spa->spa_alloc_tree));
6650 mutex_exit(&spa->spa_alloc_lock);
6653 * If there are any pending vdev state changes, convert them
6654 * into config changes that go out with this transaction group.
6656 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
6657 while (list_head(&spa->spa_state_dirty_list) != NULL) {
6659 * We need the write lock here because, for aux vdevs,
6660 * calling vdev_config_dirty() modifies sav_config.
6661 * This is ugly and will become unnecessary when we
6662 * eliminate the aux vdev wart by integrating all vdevs
6663 * into the root vdev tree.
6665 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
6666 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER);
6667 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) {
6668 vdev_state_clean(vd);
6669 vdev_config_dirty(vd);
6671 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG);
6672 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER);
6674 spa_config_exit(spa, SCL_STATE, FTAG);
6676 tx = dmu_tx_create_assigned(dp, txg);
6678 spa->spa_sync_starttime = gethrtime();
6680 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid,
6681 spa->spa_sync_starttime + spa->spa_deadman_synctime));
6682 #else /* !illumos */
6684 callout_schedule(&spa->spa_deadman_cycid,
6685 hz * spa->spa_deadman_synctime / NANOSEC);
6687 #endif /* illumos */
6690 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
6691 * set spa_deflate if we have no raid-z vdevs.
6693 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE &&
6694 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) {
6697 for (i = 0; i < rvd->vdev_children; i++) {
6698 vd = rvd->vdev_child[i];
6699 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE)
6702 if (i == rvd->vdev_children) {
6703 spa->spa_deflate = TRUE;
6704 VERIFY(0 == zap_add(spa->spa_meta_objset,
6705 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE,
6706 sizeof (uint64_t), 1, &spa->spa_deflate, tx));
6711 * Set the top-level vdev's max queue depth. Evaluate each
6712 * top-level's async write queue depth in case it changed.
6713 * The max queue depth will not change in the middle of syncing
6716 uint64_t queue_depth_total = 0;
6717 for (int c = 0; c < rvd->vdev_children; c++) {
6718 vdev_t *tvd = rvd->vdev_child[c];
6719 metaslab_group_t *mg = tvd->vdev_mg;
6721 if (mg == NULL || mg->mg_class != spa_normal_class(spa) ||
6722 !metaslab_group_initialized(mg))
6726 * It is safe to do a lock-free check here because only async
6727 * allocations look at mg_max_alloc_queue_depth, and async
6728 * allocations all happen from spa_sync().
6730 ASSERT0(refcount_count(&mg->mg_alloc_queue_depth));
6731 mg->mg_max_alloc_queue_depth = max_queue_depth;
6732 queue_depth_total += mg->mg_max_alloc_queue_depth;
6734 metaslab_class_t *mc = spa_normal_class(spa);
6735 ASSERT0(refcount_count(&mc->mc_alloc_slots));
6736 mc->mc_alloc_max_slots = queue_depth_total;
6737 mc->mc_alloc_throttle_enabled = zio_dva_throttle_enabled;
6739 ASSERT3U(mc->mc_alloc_max_slots, <=,
6740 max_queue_depth * rvd->vdev_children);
6743 * Iterate to convergence.
6746 int pass = ++spa->spa_sync_pass;
6748 spa_sync_config_object(spa, tx);
6749 spa_sync_aux_dev(spa, &spa->spa_spares, tx,
6750 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES);
6751 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx,
6752 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE);
6753 spa_errlog_sync(spa, txg);
6754 dsl_pool_sync(dp, txg);
6756 if (pass < zfs_sync_pass_deferred_free) {
6757 spa_sync_frees(spa, free_bpl, tx);
6760 * We can not defer frees in pass 1, because
6761 * we sync the deferred frees later in pass 1.
6763 ASSERT3U(pass, >, 1);
6764 bplist_iterate(free_bpl, bpobj_enqueue_cb,
6765 &spa->spa_deferred_bpobj, tx);
6769 dsl_scan_sync(dp, tx);
6771 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg))
6775 spa_sync_upgrades(spa, tx);
6777 spa->spa_uberblock.ub_rootbp.blk_birth);
6779 * Note: We need to check if the MOS is dirty
6780 * because we could have marked the MOS dirty
6781 * without updating the uberblock (e.g. if we
6782 * have sync tasks but no dirty user data). We
6783 * need to check the uberblock's rootbp because
6784 * it is updated if we have synced out dirty
6785 * data (though in this case the MOS will most
6786 * likely also be dirty due to second order
6787 * effects, we don't want to rely on that here).
6789 if (spa->spa_uberblock.ub_rootbp.blk_birth < txg &&
6790 !dmu_objset_is_dirty(mos, txg)) {
6792 * Nothing changed on the first pass,
6793 * therefore this TXG is a no-op. Avoid
6794 * syncing deferred frees, so that we
6795 * can keep this TXG as a no-op.
6797 ASSERT(txg_list_empty(&dp->dp_dirty_datasets,
6799 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg));
6800 ASSERT(txg_list_empty(&dp->dp_sync_tasks, txg));
6803 spa_sync_deferred_frees(spa, tx);
6806 } while (dmu_objset_is_dirty(mos, txg));
6809 * Rewrite the vdev configuration (which includes the uberblock)
6810 * to commit the transaction group.
6812 * If there are no dirty vdevs, we sync the uberblock to a few
6813 * random top-level vdevs that are known to be visible in the
6814 * config cache (see spa_vdev_add() for a complete description).
6815 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
6819 * We hold SCL_STATE to prevent vdev open/close/etc.
6820 * while we're attempting to write the vdev labels.
6822 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER);
6824 if (list_is_empty(&spa->spa_config_dirty_list)) {
6825 vdev_t *svd[SPA_DVAS_PER_BP];
6827 int children = rvd->vdev_children;
6828 int c0 = spa_get_random(children);
6830 for (int c = 0; c < children; c++) {
6831 vd = rvd->vdev_child[(c0 + c) % children];
6832 if (vd->vdev_ms_array == 0 || vd->vdev_islog)
6834 svd[svdcount++] = vd;
6835 if (svdcount == SPA_DVAS_PER_BP)
6838 error = vdev_config_sync(svd, svdcount, txg);
6840 error = vdev_config_sync(rvd->vdev_child,
6841 rvd->vdev_children, txg);
6845 spa->spa_last_synced_guid = rvd->vdev_guid;
6847 spa_config_exit(spa, SCL_STATE, FTAG);
6851 zio_suspend(spa, NULL);
6852 zio_resume_wait(spa);
6857 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY));
6858 #else /* !illumos */
6860 callout_drain(&spa->spa_deadman_cycid);
6862 #endif /* illumos */
6865 * Clear the dirty config list.
6867 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL)
6868 vdev_config_clean(vd);
6871 * Now that the new config has synced transactionally,
6872 * let it become visible to the config cache.
6874 if (spa->spa_config_syncing != NULL) {
6875 spa_config_set(spa, spa->spa_config_syncing);
6876 spa->spa_config_txg = txg;
6877 spa->spa_config_syncing = NULL;
6880 dsl_pool_sync_done(dp, txg);
6882 mutex_enter(&spa->spa_alloc_lock);
6883 VERIFY0(avl_numnodes(&spa->spa_alloc_tree));
6884 mutex_exit(&spa->spa_alloc_lock);
6887 * Update usable space statistics.
6889 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg)))
6890 vdev_sync_done(vd, txg);
6892 spa_update_dspace(spa);
6895 * It had better be the case that we didn't dirty anything
6896 * since vdev_config_sync().
6898 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg));
6899 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg));
6900 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg));
6902 spa->spa_sync_pass = 0;
6905 * Update the last synced uberblock here. We want to do this at
6906 * the end of spa_sync() so that consumers of spa_last_synced_txg()
6907 * will be guaranteed that all the processing associated with
6908 * that txg has been completed.
6910 spa->spa_ubsync = spa->spa_uberblock;
6911 spa_config_exit(spa, SCL_CONFIG, FTAG);
6913 spa_handle_ignored_writes(spa);
6916 * If any async tasks have been requested, kick them off.
6918 spa_async_dispatch(spa);
6919 spa_async_dispatch_vd(spa);
6923 * Sync all pools. We don't want to hold the namespace lock across these
6924 * operations, so we take a reference on the spa_t and drop the lock during the
6928 spa_sync_allpools(void)
6931 mutex_enter(&spa_namespace_lock);
6932 while ((spa = spa_next(spa)) != NULL) {
6933 if (spa_state(spa) != POOL_STATE_ACTIVE ||
6934 !spa_writeable(spa) || spa_suspended(spa))
6936 spa_open_ref(spa, FTAG);
6937 mutex_exit(&spa_namespace_lock);
6938 txg_wait_synced(spa_get_dsl(spa), 0);
6939 mutex_enter(&spa_namespace_lock);
6940 spa_close(spa, FTAG);
6942 mutex_exit(&spa_namespace_lock);
6946 * ==========================================================================
6947 * Miscellaneous routines
6948 * ==========================================================================
6952 * Remove all pools in the system.
6960 * Remove all cached state. All pools should be closed now,
6961 * so every spa in the AVL tree should be unreferenced.
6963 mutex_enter(&spa_namespace_lock);
6964 while ((spa = spa_next(NULL)) != NULL) {
6966 * Stop async tasks. The async thread may need to detach
6967 * a device that's been replaced, which requires grabbing
6968 * spa_namespace_lock, so we must drop it here.
6970 spa_open_ref(spa, FTAG);
6971 mutex_exit(&spa_namespace_lock);
6972 spa_async_suspend(spa);
6973 mutex_enter(&spa_namespace_lock);
6974 spa_close(spa, FTAG);
6976 if (spa->spa_state != POOL_STATE_UNINITIALIZED) {
6978 spa_deactivate(spa);
6982 mutex_exit(&spa_namespace_lock);
6986 spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux)
6991 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL)
6995 for (i = 0; i < spa->spa_l2cache.sav_count; i++) {
6996 vd = spa->spa_l2cache.sav_vdevs[i];
6997 if (vd->vdev_guid == guid)
7001 for (i = 0; i < spa->spa_spares.sav_count; i++) {
7002 vd = spa->spa_spares.sav_vdevs[i];
7003 if (vd->vdev_guid == guid)
7012 spa_upgrade(spa_t *spa, uint64_t version)
7014 ASSERT(spa_writeable(spa));
7016 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
7019 * This should only be called for a non-faulted pool, and since a
7020 * future version would result in an unopenable pool, this shouldn't be
7023 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version));
7024 ASSERT3U(version, >=, spa->spa_uberblock.ub_version);
7026 spa->spa_uberblock.ub_version = version;
7027 vdev_config_dirty(spa->spa_root_vdev);
7029 spa_config_exit(spa, SCL_ALL, FTAG);
7031 txg_wait_synced(spa_get_dsl(spa), 0);
7035 spa_has_spare(spa_t *spa, uint64_t guid)
7039 spa_aux_vdev_t *sav = &spa->spa_spares;
7041 for (i = 0; i < sav->sav_count; i++)
7042 if (sav->sav_vdevs[i]->vdev_guid == guid)
7045 for (i = 0; i < sav->sav_npending; i++) {
7046 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID,
7047 &spareguid) == 0 && spareguid == guid)
7055 * Check if a pool has an active shared spare device.
7056 * Note: reference count of an active spare is 2, as a spare and as a replace
7059 spa_has_active_shared_spare(spa_t *spa)
7063 spa_aux_vdev_t *sav = &spa->spa_spares;
7065 for (i = 0; i < sav->sav_count; i++) {
7066 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool,
7067 &refcnt) && pool != 0ULL && pool == spa_guid(spa) &&
7076 spa_event_create(spa_t *spa, vdev_t *vd, const char *name)
7078 sysevent_t *ev = NULL;
7080 sysevent_attr_list_t *attr = NULL;
7081 sysevent_value_t value;
7083 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs",
7087 value.value_type = SE_DATA_TYPE_STRING;
7088 value.value.sv_string = spa_name(spa);
7089 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0)
7092 value.value_type = SE_DATA_TYPE_UINT64;
7093 value.value.sv_uint64 = spa_guid(spa);
7094 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0)
7098 value.value_type = SE_DATA_TYPE_UINT64;
7099 value.value.sv_uint64 = vd->vdev_guid;
7100 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value,
7104 if (vd->vdev_path) {
7105 value.value_type = SE_DATA_TYPE_STRING;
7106 value.value.sv_string = vd->vdev_path;
7107 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH,
7108 &value, SE_SLEEP) != 0)
7113 if (sysevent_attach_attributes(ev, attr) != 0)
7119 sysevent_free_attr(attr);
7126 spa_event_post(sysevent_t *ev)
7131 (void) log_sysevent(ev, SE_SLEEP, &eid);
7137 * Post a sysevent corresponding to the given event. The 'name' must be one of
7138 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
7139 * filled in from the spa and (optionally) the vdev. This doesn't do anything
7140 * in the userland libzpool, as we don't want consumers to misinterpret ztest
7141 * or zdb as real changes.
7144 spa_event_notify(spa_t *spa, vdev_t *vd, const char *name)
7146 spa_event_post(spa_event_create(spa, vd, name));