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 2011 Nexenta Systems, Inc. All rights reserved.
25 * Copyright (c) 2012 by Delphix. All rights reserved.
29 * This file contains all the routines used when modifying on-disk SPA state.
30 * This includes opening, importing, destroying, exporting a pool, and syncing a
34 #include <sys/zfs_context.h>
35 #include <sys/fm/fs/zfs.h>
36 #include <sys/spa_impl.h>
38 #include <sys/zio_checksum.h>
40 #include <sys/dmu_tx.h>
44 #include <sys/vdev_impl.h>
45 #include <sys/vdev_disk.h>
46 #include <sys/metaslab.h>
47 #include <sys/metaslab_impl.h>
48 #include <sys/uberblock_impl.h>
51 #include <sys/dmu_traverse.h>
52 #include <sys/dmu_objset.h>
53 #include <sys/unique.h>
54 #include <sys/dsl_pool.h>
55 #include <sys/dsl_dataset.h>
56 #include <sys/dsl_dir.h>
57 #include <sys/dsl_prop.h>
58 #include <sys/dsl_synctask.h>
59 #include <sys/fs/zfs.h>
61 #include <sys/callb.h>
62 #include <sys/systeminfo.h>
63 #include <sys/spa_boot.h>
64 #include <sys/zfs_ioctl.h>
65 #include <sys/dsl_scan.h>
66 #include <sys/zfeature.h>
69 #include <sys/bootprops.h>
70 #include <sys/callb.h>
71 #include <sys/cpupart.h>
73 #include <sys/sysdc.h>
78 #include "zfs_comutil.h"
80 typedef enum zti_modes
{
81 zti_mode_fixed
, /* value is # of threads (min 1) */
82 zti_mode_online_percent
, /* value is % of online CPUs */
83 zti_mode_batch
, /* cpu-intensive; value is ignored */
84 zti_mode_null
, /* don't create a taskq */
88 #define ZTI_FIX(n) { zti_mode_fixed, (n) }
89 #define ZTI_PCT(n) { zti_mode_online_percent, (n) }
90 #define ZTI_BATCH { zti_mode_batch, 0 }
91 #define ZTI_NULL { zti_mode_null, 0 }
93 #define ZTI_ONE ZTI_FIX(1)
95 typedef struct zio_taskq_info
{
96 enum zti_modes zti_mode
;
100 static const char *const zio_taskq_types
[ZIO_TASKQ_TYPES
] = {
101 "iss", "iss_h", "int", "int_h"
105 * Define the taskq threads for the following I/O types:
106 * NULL, READ, WRITE, FREE, CLAIM, and IOCTL
108 const zio_taskq_info_t zio_taskqs
[ZIO_TYPES
][ZIO_TASKQ_TYPES
] = {
109 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */
110 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
111 { ZTI_FIX(8), ZTI_NULL
, ZTI_BATCH
, ZTI_NULL
},
112 { ZTI_BATCH
, ZTI_FIX(5), ZTI_FIX(16), ZTI_FIX(5) },
113 { ZTI_PCT(100), ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
114 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
115 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
118 static dsl_syncfunc_t spa_sync_version
;
119 static dsl_syncfunc_t spa_sync_props
;
120 static dsl_checkfunc_t spa_change_guid_check
;
121 static dsl_syncfunc_t spa_change_guid_sync
;
122 static boolean_t
spa_has_active_shared_spare(spa_t
*spa
);
123 static inline int spa_load_impl(spa_t
*spa
, uint64_t, nvlist_t
*config
,
124 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
126 static void spa_vdev_resilver_done(spa_t
*spa
);
128 uint_t zio_taskq_batch_pct
= 100; /* 1 thread per cpu in pset */
129 id_t zio_taskq_psrset_bind
= PS_NONE
;
130 boolean_t zio_taskq_sysdc
= B_TRUE
; /* use SDC scheduling class */
131 uint_t zio_taskq_basedc
= 80; /* base duty cycle */
133 boolean_t spa_create_process
= B_TRUE
; /* no process ==> no sysdc */
136 * This (illegal) pool name is used when temporarily importing a spa_t in order
137 * to get the vdev stats associated with the imported devices.
139 #define TRYIMPORT_NAME "$import"
142 * ==========================================================================
143 * SPA properties routines
144 * ==========================================================================
148 * Add a (source=src, propname=propval) list to an nvlist.
151 spa_prop_add_list(nvlist_t
*nvl
, zpool_prop_t prop
, char *strval
,
152 uint64_t intval
, zprop_source_t src
)
154 const char *propname
= zpool_prop_to_name(prop
);
157 VERIFY(nvlist_alloc(&propval
, NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
158 VERIFY(nvlist_add_uint64(propval
, ZPROP_SOURCE
, src
) == 0);
161 VERIFY(nvlist_add_string(propval
, ZPROP_VALUE
, strval
) == 0);
163 VERIFY(nvlist_add_uint64(propval
, ZPROP_VALUE
, intval
) == 0);
165 VERIFY(nvlist_add_nvlist(nvl
, propname
, propval
) == 0);
166 nvlist_free(propval
);
170 * Get property values from the spa configuration.
173 spa_prop_get_config(spa_t
*spa
, nvlist_t
**nvp
)
175 vdev_t
*rvd
= spa
->spa_root_vdev
;
176 dsl_pool_t
*pool
= spa
->spa_dsl_pool
;
180 uint64_t cap
, version
;
181 zprop_source_t src
= ZPROP_SRC_NONE
;
182 spa_config_dirent_t
*dp
;
185 ASSERT(MUTEX_HELD(&spa
->spa_props_lock
));
188 alloc
= metaslab_class_get_alloc(spa_normal_class(spa
));
189 size
= metaslab_class_get_space(spa_normal_class(spa
));
190 spa_prop_add_list(*nvp
, ZPOOL_PROP_NAME
, spa_name(spa
), 0, src
);
191 spa_prop_add_list(*nvp
, ZPOOL_PROP_SIZE
, NULL
, size
, src
);
192 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALLOCATED
, NULL
, alloc
, src
);
193 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREE
, NULL
,
197 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
198 vdev_t
*tvd
= rvd
->vdev_child
[c
];
199 space
+= tvd
->vdev_max_asize
- tvd
->vdev_asize
;
201 spa_prop_add_list(*nvp
, ZPOOL_PROP_EXPANDSZ
, NULL
, space
,
204 spa_prop_add_list(*nvp
, ZPOOL_PROP_READONLY
, NULL
,
205 (spa_mode(spa
) == FREAD
), src
);
207 cap
= (size
== 0) ? 0 : (alloc
* 100 / size
);
208 spa_prop_add_list(*nvp
, ZPOOL_PROP_CAPACITY
, NULL
, cap
, src
);
210 spa_prop_add_list(*nvp
, ZPOOL_PROP_DEDUPRATIO
, NULL
,
211 ddt_get_pool_dedup_ratio(spa
), src
);
213 spa_prop_add_list(*nvp
, ZPOOL_PROP_HEALTH
, NULL
,
214 rvd
->vdev_state
, src
);
216 version
= spa_version(spa
);
217 if (version
== zpool_prop_default_numeric(ZPOOL_PROP_VERSION
))
218 src
= ZPROP_SRC_DEFAULT
;
220 src
= ZPROP_SRC_LOCAL
;
221 spa_prop_add_list(*nvp
, ZPOOL_PROP_VERSION
, NULL
, version
, src
);
225 dsl_dir_t
*freedir
= pool
->dp_free_dir
;
228 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS,
229 * when opening pools before this version freedir will be NULL.
231 if (freedir
!= NULL
) {
232 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREEING
, NULL
,
233 freedir
->dd_phys
->dd_used_bytes
, src
);
235 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREEING
,
240 spa_prop_add_list(*nvp
, ZPOOL_PROP_GUID
, NULL
, spa_guid(spa
), src
);
242 if (spa
->spa_comment
!= NULL
) {
243 spa_prop_add_list(*nvp
, ZPOOL_PROP_COMMENT
, spa
->spa_comment
,
247 if (spa
->spa_root
!= NULL
)
248 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALTROOT
, spa
->spa_root
,
251 if ((dp
= list_head(&spa
->spa_config_list
)) != NULL
) {
252 if (dp
->scd_path
== NULL
) {
253 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
254 "none", 0, ZPROP_SRC_LOCAL
);
255 } else if (strcmp(dp
->scd_path
, spa_config_path
) != 0) {
256 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
257 dp
->scd_path
, 0, ZPROP_SRC_LOCAL
);
263 * Get zpool property values.
266 spa_prop_get(spa_t
*spa
, nvlist_t
**nvp
)
268 objset_t
*mos
= spa
->spa_meta_objset
;
273 err
= nvlist_alloc(nvp
, NV_UNIQUE_NAME
, KM_PUSHPAGE
);
277 mutex_enter(&spa
->spa_props_lock
);
280 * Get properties from the spa config.
282 spa_prop_get_config(spa
, nvp
);
284 /* If no pool property object, no more prop to get. */
285 if (mos
== NULL
|| spa
->spa_pool_props_object
== 0) {
286 mutex_exit(&spa
->spa_props_lock
);
291 * Get properties from the MOS pool property object.
293 for (zap_cursor_init(&zc
, mos
, spa
->spa_pool_props_object
);
294 (err
= zap_cursor_retrieve(&zc
, &za
)) == 0;
295 zap_cursor_advance(&zc
)) {
298 zprop_source_t src
= ZPROP_SRC_DEFAULT
;
301 if ((prop
= zpool_name_to_prop(za
.za_name
)) == ZPROP_INVAL
)
304 switch (za
.za_integer_length
) {
306 /* integer property */
307 if (za
.za_first_integer
!=
308 zpool_prop_default_numeric(prop
))
309 src
= ZPROP_SRC_LOCAL
;
311 if (prop
== ZPOOL_PROP_BOOTFS
) {
313 dsl_dataset_t
*ds
= NULL
;
315 dp
= spa_get_dsl(spa
);
316 rw_enter(&dp
->dp_config_rwlock
, RW_READER
);
317 if ((err
= dsl_dataset_hold_obj(dp
,
318 za
.za_first_integer
, FTAG
, &ds
))) {
319 rw_exit(&dp
->dp_config_rwlock
);
324 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1,
326 dsl_dataset_name(ds
, strval
);
327 dsl_dataset_rele(ds
, FTAG
);
328 rw_exit(&dp
->dp_config_rwlock
);
331 intval
= za
.za_first_integer
;
334 spa_prop_add_list(*nvp
, prop
, strval
, intval
, src
);
338 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1);
343 /* string property */
344 strval
= kmem_alloc(za
.za_num_integers
, KM_PUSHPAGE
);
345 err
= zap_lookup(mos
, spa
->spa_pool_props_object
,
346 za
.za_name
, 1, za
.za_num_integers
, strval
);
348 kmem_free(strval
, za
.za_num_integers
);
351 spa_prop_add_list(*nvp
, prop
, strval
, 0, src
);
352 kmem_free(strval
, za
.za_num_integers
);
359 zap_cursor_fini(&zc
);
360 mutex_exit(&spa
->spa_props_lock
);
362 if (err
&& err
!= ENOENT
) {
372 * Validate the given pool properties nvlist and modify the list
373 * for the property values to be set.
376 spa_prop_validate(spa_t
*spa
, nvlist_t
*props
)
379 int error
= 0, reset_bootfs
= 0;
381 boolean_t has_feature
= B_FALSE
;
384 while ((elem
= nvlist_next_nvpair(props
, elem
)) != NULL
) {
386 char *strval
, *slash
, *check
, *fname
;
387 const char *propname
= nvpair_name(elem
);
388 zpool_prop_t prop
= zpool_name_to_prop(propname
);
392 if (!zpool_prop_feature(propname
)) {
398 * Sanitize the input.
400 if (nvpair_type(elem
) != DATA_TYPE_UINT64
) {
405 if (nvpair_value_uint64(elem
, &intval
) != 0) {
415 fname
= strchr(propname
, '@') + 1;
416 if (zfeature_lookup_name(fname
, NULL
) != 0) {
421 has_feature
= B_TRUE
;
424 case ZPOOL_PROP_VERSION
:
425 error
= nvpair_value_uint64(elem
, &intval
);
427 (intval
< spa_version(spa
) ||
428 intval
> SPA_VERSION_BEFORE_FEATURES
||
433 case ZPOOL_PROP_DELEGATION
:
434 case ZPOOL_PROP_AUTOREPLACE
:
435 case ZPOOL_PROP_LISTSNAPS
:
436 case ZPOOL_PROP_AUTOEXPAND
:
437 error
= nvpair_value_uint64(elem
, &intval
);
438 if (!error
&& intval
> 1)
442 case ZPOOL_PROP_BOOTFS
:
444 * If the pool version is less than SPA_VERSION_BOOTFS,
445 * or the pool is still being created (version == 0),
446 * the bootfs property cannot be set.
448 if (spa_version(spa
) < SPA_VERSION_BOOTFS
) {
454 * Make sure the vdev config is bootable
456 if (!vdev_is_bootable(spa
->spa_root_vdev
)) {
463 error
= nvpair_value_string(elem
, &strval
);
469 if (strval
== NULL
|| strval
[0] == '\0') {
470 objnum
= zpool_prop_default_numeric(
475 if ((error
= dmu_objset_hold(strval
,FTAG
,&os
)))
478 /* Must be ZPL and not gzip compressed. */
480 if (dmu_objset_type(os
) != DMU_OST_ZFS
) {
482 } else if ((error
= dsl_prop_get_integer(strval
,
483 zfs_prop_to_name(ZFS_PROP_COMPRESSION
),
484 &compress
, NULL
)) == 0 &&
485 !BOOTFS_COMPRESS_VALID(compress
)) {
488 objnum
= dmu_objset_id(os
);
490 dmu_objset_rele(os
, FTAG
);
494 case ZPOOL_PROP_FAILUREMODE
:
495 error
= nvpair_value_uint64(elem
, &intval
);
496 if (!error
&& (intval
< ZIO_FAILURE_MODE_WAIT
||
497 intval
> ZIO_FAILURE_MODE_PANIC
))
501 * This is a special case which only occurs when
502 * the pool has completely failed. This allows
503 * the user to change the in-core failmode property
504 * without syncing it out to disk (I/Os might
505 * currently be blocked). We do this by returning
506 * EIO to the caller (spa_prop_set) to trick it
507 * into thinking we encountered a property validation
510 if (!error
&& spa_suspended(spa
)) {
511 spa
->spa_failmode
= intval
;
516 case ZPOOL_PROP_CACHEFILE
:
517 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
520 if (strval
[0] == '\0')
523 if (strcmp(strval
, "none") == 0)
526 if (strval
[0] != '/') {
531 slash
= strrchr(strval
, '/');
532 ASSERT(slash
!= NULL
);
534 if (slash
[1] == '\0' || strcmp(slash
, "/.") == 0 ||
535 strcmp(slash
, "/..") == 0)
539 case ZPOOL_PROP_COMMENT
:
540 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
542 for (check
= strval
; *check
!= '\0'; check
++) {
543 if (!isprint(*check
)) {
549 if (strlen(strval
) > ZPROP_MAX_COMMENT
)
553 case ZPOOL_PROP_DEDUPDITTO
:
554 if (spa_version(spa
) < SPA_VERSION_DEDUP
)
557 error
= nvpair_value_uint64(elem
, &intval
);
559 intval
!= 0 && intval
< ZIO_DEDUPDITTO_MIN
)
571 if (!error
&& reset_bootfs
) {
572 error
= nvlist_remove(props
,
573 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), DATA_TYPE_STRING
);
576 error
= nvlist_add_uint64(props
,
577 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), objnum
);
585 spa_configfile_set(spa_t
*spa
, nvlist_t
*nvp
, boolean_t need_sync
)
588 spa_config_dirent_t
*dp
;
590 if (nvlist_lookup_string(nvp
, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE
),
594 dp
= kmem_alloc(sizeof (spa_config_dirent_t
),
597 if (cachefile
[0] == '\0')
598 dp
->scd_path
= spa_strdup(spa_config_path
);
599 else if (strcmp(cachefile
, "none") == 0)
602 dp
->scd_path
= spa_strdup(cachefile
);
604 list_insert_head(&spa
->spa_config_list
, dp
);
606 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
610 spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
)
613 nvpair_t
*elem
= NULL
;
614 boolean_t need_sync
= B_FALSE
;
616 if ((error
= spa_prop_validate(spa
, nvp
)) != 0)
619 while ((elem
= nvlist_next_nvpair(nvp
, elem
)) != NULL
) {
620 zpool_prop_t prop
= zpool_name_to_prop(nvpair_name(elem
));
622 if (prop
== ZPOOL_PROP_CACHEFILE
||
623 prop
== ZPOOL_PROP_ALTROOT
||
624 prop
== ZPOOL_PROP_READONLY
)
627 if (prop
== ZPOOL_PROP_VERSION
|| prop
== ZPROP_INVAL
) {
630 if (prop
== ZPOOL_PROP_VERSION
) {
631 VERIFY(nvpair_value_uint64(elem
, &ver
) == 0);
633 ASSERT(zpool_prop_feature(nvpair_name(elem
)));
634 ver
= SPA_VERSION_FEATURES
;
638 /* Save time if the version is already set. */
639 if (ver
== spa_version(spa
))
643 * In addition to the pool directory object, we might
644 * create the pool properties object, the features for
645 * read object, the features for write object, or the
646 * feature descriptions object.
648 error
= dsl_sync_task_do(spa_get_dsl(spa
), NULL
,
649 spa_sync_version
, spa
, &ver
, 6);
660 return (dsl_sync_task_do(spa_get_dsl(spa
), NULL
, spa_sync_props
,
668 * If the bootfs property value is dsobj, clear it.
671 spa_prop_clear_bootfs(spa_t
*spa
, uint64_t dsobj
, dmu_tx_t
*tx
)
673 if (spa
->spa_bootfs
== dsobj
&& spa
->spa_pool_props_object
!= 0) {
674 VERIFY(zap_remove(spa
->spa_meta_objset
,
675 spa
->spa_pool_props_object
,
676 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), tx
) == 0);
683 spa_change_guid_check(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
686 vdev_t
*rvd
= spa
->spa_root_vdev
;
688 ASSERTV(uint64_t *newguid
= arg2
);
690 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
691 vdev_state
= rvd
->vdev_state
;
692 spa_config_exit(spa
, SCL_STATE
, FTAG
);
694 if (vdev_state
!= VDEV_STATE_HEALTHY
)
697 ASSERT3U(spa_guid(spa
), !=, *newguid
);
703 spa_change_guid_sync(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
706 uint64_t *newguid
= arg2
;
708 vdev_t
*rvd
= spa
->spa_root_vdev
;
710 oldguid
= spa_guid(spa
);
712 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
713 rvd
->vdev_guid
= *newguid
;
714 rvd
->vdev_guid_sum
+= (*newguid
- oldguid
);
715 vdev_config_dirty(rvd
);
716 spa_config_exit(spa
, SCL_STATE
, FTAG
);
718 spa_history_log_internal(LOG_POOL_GUID_CHANGE
, spa
, tx
,
719 "old=%lld new=%lld", oldguid
, *newguid
);
723 * Change the GUID for the pool. This is done so that we can later
724 * re-import a pool built from a clone of our own vdevs. We will modify
725 * the root vdev's guid, our own pool guid, and then mark all of our
726 * vdevs dirty. Note that we must make sure that all our vdevs are
727 * online when we do this, or else any vdevs that weren't present
728 * would be orphaned from our pool. We are also going to issue a
729 * sysevent to update any watchers.
732 spa_change_guid(spa_t
*spa
)
737 mutex_enter(&spa_namespace_lock
);
738 guid
= spa_generate_guid(NULL
);
740 error
= dsl_sync_task_do(spa_get_dsl(spa
), spa_change_guid_check
,
741 spa_change_guid_sync
, spa
, &guid
, 5);
744 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
745 spa_event_notify(spa
, NULL
, FM_EREPORT_ZFS_POOL_REGUID
);
748 mutex_exit(&spa_namespace_lock
);
754 * ==========================================================================
755 * SPA state manipulation (open/create/destroy/import/export)
756 * ==========================================================================
760 spa_error_entry_compare(const void *a
, const void *b
)
762 spa_error_entry_t
*sa
= (spa_error_entry_t
*)a
;
763 spa_error_entry_t
*sb
= (spa_error_entry_t
*)b
;
766 ret
= bcmp(&sa
->se_bookmark
, &sb
->se_bookmark
,
767 sizeof (zbookmark_t
));
778 * Utility function which retrieves copies of the current logs and
779 * re-initializes them in the process.
782 spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
)
784 ASSERT(MUTEX_HELD(&spa
->spa_errlist_lock
));
786 bcopy(&spa
->spa_errlist_last
, last
, sizeof (avl_tree_t
));
787 bcopy(&spa
->spa_errlist_scrub
, scrub
, sizeof (avl_tree_t
));
789 avl_create(&spa
->spa_errlist_scrub
,
790 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
791 offsetof(spa_error_entry_t
, se_avl
));
792 avl_create(&spa
->spa_errlist_last
,
793 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
794 offsetof(spa_error_entry_t
, se_avl
));
798 spa_taskq_create(spa_t
*spa
, const char *name
, enum zti_modes mode
,
801 uint_t flags
= TASKQ_PREPOPULATE
;
802 boolean_t batch
= B_FALSE
;
806 return (NULL
); /* no taskq needed */
809 ASSERT3U(value
, >=, 1);
810 value
= MAX(value
, 1);
815 flags
|= TASKQ_THREADS_CPU_PCT
;
816 value
= zio_taskq_batch_pct
;
819 case zti_mode_online_percent
:
820 flags
|= TASKQ_THREADS_CPU_PCT
;
824 panic("unrecognized mode for %s taskq (%u:%u) in "
830 if (zio_taskq_sysdc
&& spa
->spa_proc
!= &p0
) {
832 flags
|= TASKQ_DC_BATCH
;
834 return (taskq_create_sysdc(name
, value
, 50, INT_MAX
,
835 spa
->spa_proc
, zio_taskq_basedc
, flags
));
837 return (taskq_create_proc(name
, value
, maxclsyspri
, 50, INT_MAX
,
838 spa
->spa_proc
, flags
));
842 spa_create_zio_taskqs(spa_t
*spa
)
846 for (t
= 0; t
< ZIO_TYPES
; t
++) {
847 for (q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
848 const zio_taskq_info_t
*ztip
= &zio_taskqs
[t
][q
];
849 enum zti_modes mode
= ztip
->zti_mode
;
850 uint_t value
= ztip
->zti_value
;
853 (void) snprintf(name
, sizeof (name
),
854 "%s_%s", zio_type_name
[t
], zio_taskq_types
[q
]);
856 spa
->spa_zio_taskq
[t
][q
] =
857 spa_taskq_create(spa
, name
, mode
, value
);
862 #if defined(_KERNEL) && defined(HAVE_SPA_THREAD)
864 spa_thread(void *arg
)
869 user_t
*pu
= PTOU(curproc
);
871 CALLB_CPR_INIT(&cprinfo
, &spa
->spa_proc_lock
, callb_generic_cpr
,
874 ASSERT(curproc
!= &p0
);
875 (void) snprintf(pu
->u_psargs
, sizeof (pu
->u_psargs
),
876 "zpool-%s", spa
->spa_name
);
877 (void) strlcpy(pu
->u_comm
, pu
->u_psargs
, sizeof (pu
->u_comm
));
879 /* bind this thread to the requested psrset */
880 if (zio_taskq_psrset_bind
!= PS_NONE
) {
882 mutex_enter(&cpu_lock
);
883 mutex_enter(&pidlock
);
884 mutex_enter(&curproc
->p_lock
);
886 if (cpupart_bind_thread(curthread
, zio_taskq_psrset_bind
,
887 0, NULL
, NULL
) == 0) {
888 curthread
->t_bind_pset
= zio_taskq_psrset_bind
;
891 "Couldn't bind process for zfs pool \"%s\" to "
892 "pset %d\n", spa
->spa_name
, zio_taskq_psrset_bind
);
895 mutex_exit(&curproc
->p_lock
);
896 mutex_exit(&pidlock
);
897 mutex_exit(&cpu_lock
);
901 if (zio_taskq_sysdc
) {
902 sysdc_thread_enter(curthread
, 100, 0);
905 spa
->spa_proc
= curproc
;
906 spa
->spa_did
= curthread
->t_did
;
908 spa_create_zio_taskqs(spa
);
910 mutex_enter(&spa
->spa_proc_lock
);
911 ASSERT(spa
->spa_proc_state
== SPA_PROC_CREATED
);
913 spa
->spa_proc_state
= SPA_PROC_ACTIVE
;
914 cv_broadcast(&spa
->spa_proc_cv
);
916 CALLB_CPR_SAFE_BEGIN(&cprinfo
);
917 while (spa
->spa_proc_state
== SPA_PROC_ACTIVE
)
918 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
919 CALLB_CPR_SAFE_END(&cprinfo
, &spa
->spa_proc_lock
);
921 ASSERT(spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
);
922 spa
->spa_proc_state
= SPA_PROC_GONE
;
924 cv_broadcast(&spa
->spa_proc_cv
);
925 CALLB_CPR_EXIT(&cprinfo
); /* drops spa_proc_lock */
927 mutex_enter(&curproc
->p_lock
);
933 * Activate an uninitialized pool.
936 spa_activate(spa_t
*spa
, int mode
)
938 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
940 spa
->spa_state
= POOL_STATE_ACTIVE
;
941 spa
->spa_mode
= mode
;
943 spa
->spa_normal_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
944 spa
->spa_log_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
946 /* Try to create a covering process */
947 mutex_enter(&spa
->spa_proc_lock
);
948 ASSERT(spa
->spa_proc_state
== SPA_PROC_NONE
);
949 ASSERT(spa
->spa_proc
== &p0
);
952 #ifdef HAVE_SPA_THREAD
953 /* Only create a process if we're going to be around a while. */
954 if (spa_create_process
&& strcmp(spa
->spa_name
, TRYIMPORT_NAME
) != 0) {
955 if (newproc(spa_thread
, (caddr_t
)spa
, syscid
, maxclsyspri
,
957 spa
->spa_proc_state
= SPA_PROC_CREATED
;
958 while (spa
->spa_proc_state
== SPA_PROC_CREATED
) {
959 cv_wait(&spa
->spa_proc_cv
,
960 &spa
->spa_proc_lock
);
962 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
963 ASSERT(spa
->spa_proc
!= &p0
);
964 ASSERT(spa
->spa_did
!= 0);
968 "Couldn't create process for zfs pool \"%s\"\n",
973 #endif /* HAVE_SPA_THREAD */
974 mutex_exit(&spa
->spa_proc_lock
);
976 /* If we didn't create a process, we need to create our taskqs. */
977 if (spa
->spa_proc
== &p0
) {
978 spa_create_zio_taskqs(spa
);
981 list_create(&spa
->spa_config_dirty_list
, sizeof (vdev_t
),
982 offsetof(vdev_t
, vdev_config_dirty_node
));
983 list_create(&spa
->spa_state_dirty_list
, sizeof (vdev_t
),
984 offsetof(vdev_t
, vdev_state_dirty_node
));
986 txg_list_create(&spa
->spa_vdev_txg_list
,
987 offsetof(struct vdev
, vdev_txg_node
));
989 avl_create(&spa
->spa_errlist_scrub
,
990 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
991 offsetof(spa_error_entry_t
, se_avl
));
992 avl_create(&spa
->spa_errlist_last
,
993 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
994 offsetof(spa_error_entry_t
, se_avl
));
998 * Opposite of spa_activate().
1001 spa_deactivate(spa_t
*spa
)
1005 ASSERT(spa
->spa_sync_on
== B_FALSE
);
1006 ASSERT(spa
->spa_dsl_pool
== NULL
);
1007 ASSERT(spa
->spa_root_vdev
== NULL
);
1008 ASSERT(spa
->spa_async_zio_root
== NULL
);
1009 ASSERT(spa
->spa_state
!= POOL_STATE_UNINITIALIZED
);
1011 txg_list_destroy(&spa
->spa_vdev_txg_list
);
1013 list_destroy(&spa
->spa_config_dirty_list
);
1014 list_destroy(&spa
->spa_state_dirty_list
);
1016 for (t
= 0; t
< ZIO_TYPES
; t
++) {
1017 for (q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
1018 if (spa
->spa_zio_taskq
[t
][q
] != NULL
)
1019 taskq_destroy(spa
->spa_zio_taskq
[t
][q
]);
1020 spa
->spa_zio_taskq
[t
][q
] = NULL
;
1024 metaslab_class_destroy(spa
->spa_normal_class
);
1025 spa
->spa_normal_class
= NULL
;
1027 metaslab_class_destroy(spa
->spa_log_class
);
1028 spa
->spa_log_class
= NULL
;
1031 * If this was part of an import or the open otherwise failed, we may
1032 * still have errors left in the queues. Empty them just in case.
1034 spa_errlog_drain(spa
);
1036 avl_destroy(&spa
->spa_errlist_scrub
);
1037 avl_destroy(&spa
->spa_errlist_last
);
1039 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
1041 mutex_enter(&spa
->spa_proc_lock
);
1042 if (spa
->spa_proc_state
!= SPA_PROC_NONE
) {
1043 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
1044 spa
->spa_proc_state
= SPA_PROC_DEACTIVATE
;
1045 cv_broadcast(&spa
->spa_proc_cv
);
1046 while (spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
) {
1047 ASSERT(spa
->spa_proc
!= &p0
);
1048 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
1050 ASSERT(spa
->spa_proc_state
== SPA_PROC_GONE
);
1051 spa
->spa_proc_state
= SPA_PROC_NONE
;
1053 ASSERT(spa
->spa_proc
== &p0
);
1054 mutex_exit(&spa
->spa_proc_lock
);
1057 * We want to make sure spa_thread() has actually exited the ZFS
1058 * module, so that the module can't be unloaded out from underneath
1061 if (spa
->spa_did
!= 0) {
1062 thread_join(spa
->spa_did
);
1068 * Verify a pool configuration, and construct the vdev tree appropriately. This
1069 * will create all the necessary vdevs in the appropriate layout, with each vdev
1070 * in the CLOSED state. This will prep the pool before open/creation/import.
1071 * All vdev validation is done by the vdev_alloc() routine.
1074 spa_config_parse(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
,
1075 uint_t id
, int atype
)
1082 if ((error
= vdev_alloc(spa
, vdp
, nv
, parent
, id
, atype
)) != 0)
1085 if ((*vdp
)->vdev_ops
->vdev_op_leaf
)
1088 error
= nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
1091 if (error
== ENOENT
)
1100 for (c
= 0; c
< children
; c
++) {
1102 if ((error
= spa_config_parse(spa
, &vd
, child
[c
], *vdp
, c
,
1110 ASSERT(*vdp
!= NULL
);
1116 * Opposite of spa_load().
1119 spa_unload(spa_t
*spa
)
1123 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1128 spa_async_suspend(spa
);
1133 if (spa
->spa_sync_on
) {
1134 txg_sync_stop(spa
->spa_dsl_pool
);
1135 spa
->spa_sync_on
= B_FALSE
;
1139 * Wait for any outstanding async I/O to complete.
1141 if (spa
->spa_async_zio_root
!= NULL
) {
1142 (void) zio_wait(spa
->spa_async_zio_root
);
1143 spa
->spa_async_zio_root
= NULL
;
1146 bpobj_close(&spa
->spa_deferred_bpobj
);
1149 * Close the dsl pool.
1151 if (spa
->spa_dsl_pool
) {
1152 dsl_pool_close(spa
->spa_dsl_pool
);
1153 spa
->spa_dsl_pool
= NULL
;
1154 spa
->spa_meta_objset
= NULL
;
1159 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1162 * Drop and purge level 2 cache
1164 spa_l2cache_drop(spa
);
1169 if (spa
->spa_root_vdev
)
1170 vdev_free(spa
->spa_root_vdev
);
1171 ASSERT(spa
->spa_root_vdev
== NULL
);
1173 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1174 vdev_free(spa
->spa_spares
.sav_vdevs
[i
]);
1175 if (spa
->spa_spares
.sav_vdevs
) {
1176 kmem_free(spa
->spa_spares
.sav_vdevs
,
1177 spa
->spa_spares
.sav_count
* sizeof (void *));
1178 spa
->spa_spares
.sav_vdevs
= NULL
;
1180 if (spa
->spa_spares
.sav_config
) {
1181 nvlist_free(spa
->spa_spares
.sav_config
);
1182 spa
->spa_spares
.sav_config
= NULL
;
1184 spa
->spa_spares
.sav_count
= 0;
1186 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
1187 vdev_clear_stats(spa
->spa_l2cache
.sav_vdevs
[i
]);
1188 vdev_free(spa
->spa_l2cache
.sav_vdevs
[i
]);
1190 if (spa
->spa_l2cache
.sav_vdevs
) {
1191 kmem_free(spa
->spa_l2cache
.sav_vdevs
,
1192 spa
->spa_l2cache
.sav_count
* sizeof (void *));
1193 spa
->spa_l2cache
.sav_vdevs
= NULL
;
1195 if (spa
->spa_l2cache
.sav_config
) {
1196 nvlist_free(spa
->spa_l2cache
.sav_config
);
1197 spa
->spa_l2cache
.sav_config
= NULL
;
1199 spa
->spa_l2cache
.sav_count
= 0;
1201 spa
->spa_async_suspended
= 0;
1203 if (spa
->spa_comment
!= NULL
) {
1204 spa_strfree(spa
->spa_comment
);
1205 spa
->spa_comment
= NULL
;
1208 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1212 * Load (or re-load) the current list of vdevs describing the active spares for
1213 * this pool. When this is called, we have some form of basic information in
1214 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1215 * then re-generate a more complete list including status information.
1218 spa_load_spares(spa_t
*spa
)
1225 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1228 * First, close and free any existing spare vdevs.
1230 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1231 vd
= spa
->spa_spares
.sav_vdevs
[i
];
1233 /* Undo the call to spa_activate() below */
1234 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1235 B_FALSE
)) != NULL
&& tvd
->vdev_isspare
)
1236 spa_spare_remove(tvd
);
1241 if (spa
->spa_spares
.sav_vdevs
)
1242 kmem_free(spa
->spa_spares
.sav_vdevs
,
1243 spa
->spa_spares
.sav_count
* sizeof (void *));
1245 if (spa
->spa_spares
.sav_config
== NULL
)
1248 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
1249 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
1251 spa
->spa_spares
.sav_count
= (int)nspares
;
1252 spa
->spa_spares
.sav_vdevs
= NULL
;
1258 * Construct the array of vdevs, opening them to get status in the
1259 * process. For each spare, there is potentially two different vdev_t
1260 * structures associated with it: one in the list of spares (used only
1261 * for basic validation purposes) and one in the active vdev
1262 * configuration (if it's spared in). During this phase we open and
1263 * validate each vdev on the spare list. If the vdev also exists in the
1264 * active configuration, then we also mark this vdev as an active spare.
1266 spa
->spa_spares
.sav_vdevs
= kmem_alloc(nspares
* sizeof (void *),
1268 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1269 VERIFY(spa_config_parse(spa
, &vd
, spares
[i
], NULL
, 0,
1270 VDEV_ALLOC_SPARE
) == 0);
1273 spa
->spa_spares
.sav_vdevs
[i
] = vd
;
1275 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1276 B_FALSE
)) != NULL
) {
1277 if (!tvd
->vdev_isspare
)
1281 * We only mark the spare active if we were successfully
1282 * able to load the vdev. Otherwise, importing a pool
1283 * with a bad active spare would result in strange
1284 * behavior, because multiple pool would think the spare
1285 * is actively in use.
1287 * There is a vulnerability here to an equally bizarre
1288 * circumstance, where a dead active spare is later
1289 * brought back to life (onlined or otherwise). Given
1290 * the rarity of this scenario, and the extra complexity
1291 * it adds, we ignore the possibility.
1293 if (!vdev_is_dead(tvd
))
1294 spa_spare_activate(tvd
);
1298 vd
->vdev_aux
= &spa
->spa_spares
;
1300 if (vdev_open(vd
) != 0)
1303 if (vdev_validate_aux(vd
) == 0)
1308 * Recompute the stashed list of spares, with status information
1311 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
, ZPOOL_CONFIG_SPARES
,
1312 DATA_TYPE_NVLIST_ARRAY
) == 0);
1314 spares
= kmem_alloc(spa
->spa_spares
.sav_count
* sizeof (void *),
1316 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1317 spares
[i
] = vdev_config_generate(spa
,
1318 spa
->spa_spares
.sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_SPARE
);
1319 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
1320 ZPOOL_CONFIG_SPARES
, spares
, spa
->spa_spares
.sav_count
) == 0);
1321 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1322 nvlist_free(spares
[i
]);
1323 kmem_free(spares
, spa
->spa_spares
.sav_count
* sizeof (void *));
1327 * Load (or re-load) the current list of vdevs describing the active l2cache for
1328 * this pool. When this is called, we have some form of basic information in
1329 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1330 * then re-generate a more complete list including status information.
1331 * Devices which are already active have their details maintained, and are
1335 spa_load_l2cache(spa_t
*spa
)
1339 int i
, j
, oldnvdevs
;
1341 vdev_t
*vd
, **oldvdevs
, **newvdevs
= NULL
;
1342 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
1344 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1346 if (sav
->sav_config
!= NULL
) {
1347 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
1348 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
1349 newvdevs
= kmem_alloc(nl2cache
* sizeof (void *), KM_PUSHPAGE
);
1354 oldvdevs
= sav
->sav_vdevs
;
1355 oldnvdevs
= sav
->sav_count
;
1356 sav
->sav_vdevs
= NULL
;
1360 * Process new nvlist of vdevs.
1362 for (i
= 0; i
< nl2cache
; i
++) {
1363 VERIFY(nvlist_lookup_uint64(l2cache
[i
], ZPOOL_CONFIG_GUID
,
1367 for (j
= 0; j
< oldnvdevs
; j
++) {
1369 if (vd
!= NULL
&& guid
== vd
->vdev_guid
) {
1371 * Retain previous vdev for add/remove ops.
1379 if (newvdevs
[i
] == NULL
) {
1383 VERIFY(spa_config_parse(spa
, &vd
, l2cache
[i
], NULL
, 0,
1384 VDEV_ALLOC_L2CACHE
) == 0);
1389 * Commit this vdev as an l2cache device,
1390 * even if it fails to open.
1392 spa_l2cache_add(vd
);
1397 spa_l2cache_activate(vd
);
1399 if (vdev_open(vd
) != 0)
1402 (void) vdev_validate_aux(vd
);
1404 if (!vdev_is_dead(vd
))
1405 l2arc_add_vdev(spa
, vd
);
1410 * Purge vdevs that were dropped
1412 for (i
= 0; i
< oldnvdevs
; i
++) {
1417 ASSERT(vd
->vdev_isl2cache
);
1419 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
1420 pool
!= 0ULL && l2arc_vdev_present(vd
))
1421 l2arc_remove_vdev(vd
);
1422 vdev_clear_stats(vd
);
1428 kmem_free(oldvdevs
, oldnvdevs
* sizeof (void *));
1430 if (sav
->sav_config
== NULL
)
1433 sav
->sav_vdevs
= newvdevs
;
1434 sav
->sav_count
= (int)nl2cache
;
1437 * Recompute the stashed list of l2cache devices, with status
1438 * information this time.
1440 VERIFY(nvlist_remove(sav
->sav_config
, ZPOOL_CONFIG_L2CACHE
,
1441 DATA_TYPE_NVLIST_ARRAY
) == 0);
1443 l2cache
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_PUSHPAGE
);
1444 for (i
= 0; i
< sav
->sav_count
; i
++)
1445 l2cache
[i
] = vdev_config_generate(spa
,
1446 sav
->sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_L2CACHE
);
1447 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
1448 ZPOOL_CONFIG_L2CACHE
, l2cache
, sav
->sav_count
) == 0);
1450 for (i
= 0; i
< sav
->sav_count
; i
++)
1451 nvlist_free(l2cache
[i
]);
1453 kmem_free(l2cache
, sav
->sav_count
* sizeof (void *));
1457 load_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
**value
)
1460 char *packed
= NULL
;
1465 error
= dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
);
1469 nvsize
= *(uint64_t *)db
->db_data
;
1470 dmu_buf_rele(db
, FTAG
);
1472 packed
= kmem_alloc(nvsize
, KM_PUSHPAGE
| KM_NODEBUG
);
1473 error
= dmu_read(spa
->spa_meta_objset
, obj
, 0, nvsize
, packed
,
1476 error
= nvlist_unpack(packed
, nvsize
, value
, 0);
1477 kmem_free(packed
, nvsize
);
1483 * Checks to see if the given vdev could not be opened, in which case we post a
1484 * sysevent to notify the autoreplace code that the device has been removed.
1487 spa_check_removed(vdev_t
*vd
)
1491 for (c
= 0; c
< vd
->vdev_children
; c
++)
1492 spa_check_removed(vd
->vdev_child
[c
]);
1494 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_is_dead(vd
)) {
1495 zfs_ereport_post(FM_EREPORT_RESOURCE_AUTOREPLACE
,
1496 vd
->vdev_spa
, vd
, NULL
, 0, 0);
1497 spa_event_notify(vd
->vdev_spa
, vd
, FM_EREPORT_ZFS_DEVICE_CHECK
);
1502 * Validate the current config against the MOS config
1505 spa_config_valid(spa_t
*spa
, nvlist_t
*config
)
1507 vdev_t
*mrvd
, *rvd
= spa
->spa_root_vdev
;
1511 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nv
) == 0);
1513 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1514 VERIFY(spa_config_parse(spa
, &mrvd
, nv
, NULL
, 0, VDEV_ALLOC_LOAD
) == 0);
1516 ASSERT3U(rvd
->vdev_children
, ==, mrvd
->vdev_children
);
1519 * If we're doing a normal import, then build up any additional
1520 * diagnostic information about missing devices in this config.
1521 * We'll pass this up to the user for further processing.
1523 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
)) {
1524 nvlist_t
**child
, *nv
;
1527 child
= kmem_alloc(rvd
->vdev_children
* sizeof (nvlist_t
**),
1529 VERIFY(nvlist_alloc(&nv
, NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
1531 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1532 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1533 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1535 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1536 mtvd
->vdev_ops
!= &vdev_missing_ops
&&
1538 child
[idx
++] = vdev_config_generate(spa
, mtvd
,
1543 VERIFY(nvlist_add_nvlist_array(nv
,
1544 ZPOOL_CONFIG_CHILDREN
, child
, idx
) == 0);
1545 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
1546 ZPOOL_CONFIG_MISSING_DEVICES
, nv
) == 0);
1548 for (i
= 0; i
< idx
; i
++)
1549 nvlist_free(child
[i
]);
1552 kmem_free(child
, rvd
->vdev_children
* sizeof (char **));
1556 * Compare the root vdev tree with the information we have
1557 * from the MOS config (mrvd). Check each top-level vdev
1558 * with the corresponding MOS config top-level (mtvd).
1560 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1561 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1562 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1565 * Resolve any "missing" vdevs in the current configuration.
1566 * If we find that the MOS config has more accurate information
1567 * about the top-level vdev then use that vdev instead.
1569 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1570 mtvd
->vdev_ops
!= &vdev_missing_ops
) {
1572 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
))
1576 * Device specific actions.
1578 if (mtvd
->vdev_islog
) {
1579 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
1582 * XXX - once we have 'readonly' pool
1583 * support we should be able to handle
1584 * missing data devices by transitioning
1585 * the pool to readonly.
1591 * Swap the missing vdev with the data we were
1592 * able to obtain from the MOS config.
1594 vdev_remove_child(rvd
, tvd
);
1595 vdev_remove_child(mrvd
, mtvd
);
1597 vdev_add_child(rvd
, mtvd
);
1598 vdev_add_child(mrvd
, tvd
);
1600 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1602 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1605 } else if (mtvd
->vdev_islog
) {
1607 * Load the slog device's state from the MOS config
1608 * since it's possible that the label does not
1609 * contain the most up-to-date information.
1611 vdev_load_log_state(tvd
, mtvd
);
1616 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1619 * Ensure we were able to validate the config.
1621 return (rvd
->vdev_guid_sum
== spa
->spa_uberblock
.ub_guid_sum
);
1625 * Check for missing log devices
1628 spa_check_logs(spa_t
*spa
)
1630 switch (spa
->spa_log_state
) {
1633 case SPA_LOG_MISSING
:
1634 /* need to recheck in case slog has been restored */
1635 case SPA_LOG_UNKNOWN
:
1636 if (dmu_objset_find(spa
->spa_name
, zil_check_log_chain
, NULL
,
1637 DS_FIND_CHILDREN
)) {
1638 spa_set_log_state(spa
, SPA_LOG_MISSING
);
1647 spa_passivate_log(spa_t
*spa
)
1649 vdev_t
*rvd
= spa
->spa_root_vdev
;
1650 boolean_t slog_found
= B_FALSE
;
1653 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1655 if (!spa_has_slogs(spa
))
1658 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1659 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1660 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1662 if (tvd
->vdev_islog
) {
1663 metaslab_group_passivate(mg
);
1664 slog_found
= B_TRUE
;
1668 return (slog_found
);
1672 spa_activate_log(spa_t
*spa
)
1674 vdev_t
*rvd
= spa
->spa_root_vdev
;
1677 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1679 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1680 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1681 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1683 if (tvd
->vdev_islog
)
1684 metaslab_group_activate(mg
);
1689 spa_offline_log(spa_t
*spa
)
1693 if ((error
= dmu_objset_find(spa_name(spa
), zil_vdev_offline
,
1694 NULL
, DS_FIND_CHILDREN
)) == 0) {
1697 * We successfully offlined the log device, sync out the
1698 * current txg so that the "stubby" block can be removed
1701 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1707 spa_aux_check_removed(spa_aux_vdev_t
*sav
)
1711 for (i
= 0; i
< sav
->sav_count
; i
++)
1712 spa_check_removed(sav
->sav_vdevs
[i
]);
1716 spa_claim_notify(zio_t
*zio
)
1718 spa_t
*spa
= zio
->io_spa
;
1723 mutex_enter(&spa
->spa_props_lock
); /* any mutex will do */
1724 if (spa
->spa_claim_max_txg
< zio
->io_bp
->blk_birth
)
1725 spa
->spa_claim_max_txg
= zio
->io_bp
->blk_birth
;
1726 mutex_exit(&spa
->spa_props_lock
);
1729 typedef struct spa_load_error
{
1730 uint64_t sle_meta_count
;
1731 uint64_t sle_data_count
;
1735 spa_load_verify_done(zio_t
*zio
)
1737 blkptr_t
*bp
= zio
->io_bp
;
1738 spa_load_error_t
*sle
= zio
->io_private
;
1739 dmu_object_type_t type
= BP_GET_TYPE(bp
);
1740 int error
= zio
->io_error
;
1743 if ((BP_GET_LEVEL(bp
) != 0 || DMU_OT_IS_METADATA(type
)) &&
1744 type
!= DMU_OT_INTENT_LOG
)
1745 atomic_add_64(&sle
->sle_meta_count
, 1);
1747 atomic_add_64(&sle
->sle_data_count
, 1);
1749 zio_data_buf_free(zio
->io_data
, zio
->io_size
);
1754 spa_load_verify_cb(spa_t
*spa
, zilog_t
*zilog
, const blkptr_t
*bp
,
1755 arc_buf_t
*pbuf
, const zbookmark_t
*zb
, const dnode_phys_t
*dnp
, void *arg
)
1759 size_t size
= BP_GET_PSIZE(bp
);
1760 void *data
= zio_data_buf_alloc(size
);
1762 zio_nowait(zio_read(rio
, spa
, bp
, data
, size
,
1763 spa_load_verify_done
, rio
->io_private
, ZIO_PRIORITY_SCRUB
,
1764 ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_CANFAIL
|
1765 ZIO_FLAG_SCRUB
| ZIO_FLAG_RAW
, zb
));
1771 spa_load_verify(spa_t
*spa
)
1774 spa_load_error_t sle
= { 0 };
1775 zpool_rewind_policy_t policy
;
1776 boolean_t verify_ok
= B_FALSE
;
1779 zpool_get_rewind_policy(spa
->spa_config
, &policy
);
1781 if (policy
.zrp_request
& ZPOOL_NEVER_REWIND
)
1784 rio
= zio_root(spa
, NULL
, &sle
,
1785 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
);
1787 error
= traverse_pool(spa
, spa
->spa_verify_min_txg
,
1788 TRAVERSE_PRE
| TRAVERSE_PREFETCH
, spa_load_verify_cb
, rio
);
1790 (void) zio_wait(rio
);
1792 spa
->spa_load_meta_errors
= sle
.sle_meta_count
;
1793 spa
->spa_load_data_errors
= sle
.sle_data_count
;
1795 if (!error
&& sle
.sle_meta_count
<= policy
.zrp_maxmeta
&&
1796 sle
.sle_data_count
<= policy
.zrp_maxdata
) {
1800 spa
->spa_load_txg
= spa
->spa_uberblock
.ub_txg
;
1801 spa
->spa_load_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
1803 loss
= spa
->spa_last_ubsync_txg_ts
- spa
->spa_load_txg_ts
;
1804 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1805 ZPOOL_CONFIG_LOAD_TIME
, spa
->spa_load_txg_ts
) == 0);
1806 VERIFY(nvlist_add_int64(spa
->spa_load_info
,
1807 ZPOOL_CONFIG_REWIND_TIME
, loss
) == 0);
1808 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1809 ZPOOL_CONFIG_LOAD_DATA_ERRORS
, sle
.sle_data_count
) == 0);
1811 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
;
1815 if (error
!= ENXIO
&& error
!= EIO
)
1820 return (verify_ok
? 0 : EIO
);
1824 * Find a value in the pool props object.
1827 spa_prop_find(spa_t
*spa
, zpool_prop_t prop
, uint64_t *val
)
1829 (void) zap_lookup(spa
->spa_meta_objset
, spa
->spa_pool_props_object
,
1830 zpool_prop_to_name(prop
), sizeof (uint64_t), 1, val
);
1834 * Find a value in the pool directory object.
1837 spa_dir_prop(spa_t
*spa
, const char *name
, uint64_t *val
)
1839 return (zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
1840 name
, sizeof (uint64_t), 1, val
));
1844 spa_vdev_err(vdev_t
*vdev
, vdev_aux_t aux
, int err
)
1846 vdev_set_state(vdev
, B_TRUE
, VDEV_STATE_CANT_OPEN
, aux
);
1851 * Fix up config after a partly-completed split. This is done with the
1852 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
1853 * pool have that entry in their config, but only the splitting one contains
1854 * a list of all the guids of the vdevs that are being split off.
1856 * This function determines what to do with that list: either rejoin
1857 * all the disks to the pool, or complete the splitting process. To attempt
1858 * the rejoin, each disk that is offlined is marked online again, and
1859 * we do a reopen() call. If the vdev label for every disk that was
1860 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
1861 * then we call vdev_split() on each disk, and complete the split.
1863 * Otherwise we leave the config alone, with all the vdevs in place in
1864 * the original pool.
1867 spa_try_repair(spa_t
*spa
, nvlist_t
*config
)
1874 boolean_t attempt_reopen
;
1876 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
, &nvl
) != 0)
1879 /* check that the config is complete */
1880 if (nvlist_lookup_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
1881 &glist
, &gcount
) != 0)
1884 vd
= kmem_zalloc(gcount
* sizeof (vdev_t
*), KM_PUSHPAGE
);
1886 /* attempt to online all the vdevs & validate */
1887 attempt_reopen
= B_TRUE
;
1888 for (i
= 0; i
< gcount
; i
++) {
1889 if (glist
[i
] == 0) /* vdev is hole */
1892 vd
[i
] = spa_lookup_by_guid(spa
, glist
[i
], B_FALSE
);
1893 if (vd
[i
] == NULL
) {
1895 * Don't bother attempting to reopen the disks;
1896 * just do the split.
1898 attempt_reopen
= B_FALSE
;
1900 /* attempt to re-online it */
1901 vd
[i
]->vdev_offline
= B_FALSE
;
1905 if (attempt_reopen
) {
1906 vdev_reopen(spa
->spa_root_vdev
);
1908 /* check each device to see what state it's in */
1909 for (extracted
= 0, i
= 0; i
< gcount
; i
++) {
1910 if (vd
[i
] != NULL
&&
1911 vd
[i
]->vdev_stat
.vs_aux
!= VDEV_AUX_SPLIT_POOL
)
1918 * If every disk has been moved to the new pool, or if we never
1919 * even attempted to look at them, then we split them off for
1922 if (!attempt_reopen
|| gcount
== extracted
) {
1923 for (i
= 0; i
< gcount
; i
++)
1926 vdev_reopen(spa
->spa_root_vdev
);
1929 kmem_free(vd
, gcount
* sizeof (vdev_t
*));
1933 spa_load(spa_t
*spa
, spa_load_state_t state
, spa_import_type_t type
,
1934 boolean_t mosconfig
)
1936 nvlist_t
*config
= spa
->spa_config
;
1937 char *ereport
= FM_EREPORT_ZFS_POOL
;
1943 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
, &pool_guid
))
1946 ASSERT(spa
->spa_comment
== NULL
);
1947 if (nvlist_lookup_string(config
, ZPOOL_CONFIG_COMMENT
, &comment
) == 0)
1948 spa
->spa_comment
= spa_strdup(comment
);
1951 * Versioning wasn't explicitly added to the label until later, so if
1952 * it's not present treat it as the initial version.
1954 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VERSION
,
1955 &spa
->spa_ubsync
.ub_version
) != 0)
1956 spa
->spa_ubsync
.ub_version
= SPA_VERSION_INITIAL
;
1958 (void) nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
1959 &spa
->spa_config_txg
);
1961 if ((state
== SPA_LOAD_IMPORT
|| state
== SPA_LOAD_TRYIMPORT
) &&
1962 spa_guid_exists(pool_guid
, 0)) {
1965 spa
->spa_config_guid
= pool_guid
;
1967 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
,
1969 VERIFY(nvlist_dup(nvl
, &spa
->spa_config_splitting
,
1973 nvlist_free(spa
->spa_load_info
);
1974 spa
->spa_load_info
= fnvlist_alloc();
1976 gethrestime(&spa
->spa_loaded_ts
);
1977 error
= spa_load_impl(spa
, pool_guid
, config
, state
, type
,
1978 mosconfig
, &ereport
);
1981 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
1983 if (error
!= EEXIST
) {
1984 spa
->spa_loaded_ts
.tv_sec
= 0;
1985 spa
->spa_loaded_ts
.tv_nsec
= 0;
1987 if (error
!= EBADF
) {
1988 zfs_ereport_post(ereport
, spa
, NULL
, NULL
, 0, 0);
1991 spa
->spa_load_state
= error
? SPA_LOAD_ERROR
: SPA_LOAD_NONE
;
1998 * Load an existing storage pool, using the pool's builtin spa_config as a
1999 * source of configuration information.
2001 __attribute__((always_inline
))
2003 spa_load_impl(spa_t
*spa
, uint64_t pool_guid
, nvlist_t
*config
,
2004 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
2008 nvlist_t
*nvroot
= NULL
;
2011 uberblock_t
*ub
= &spa
->spa_uberblock
;
2012 uint64_t children
, config_cache_txg
= spa
->spa_config_txg
;
2013 int orig_mode
= spa
->spa_mode
;
2016 boolean_t missing_feat_write
= B_FALSE
;
2019 * If this is an untrusted config, access the pool in read-only mode.
2020 * This prevents things like resilvering recently removed devices.
2023 spa
->spa_mode
= FREAD
;
2025 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
2027 spa
->spa_load_state
= state
;
2029 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvroot
))
2032 parse
= (type
== SPA_IMPORT_EXISTING
?
2033 VDEV_ALLOC_LOAD
: VDEV_ALLOC_SPLIT
);
2036 * Create "The Godfather" zio to hold all async IOs
2038 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
2039 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
2042 * Parse the configuration into a vdev tree. We explicitly set the
2043 * value that will be returned by spa_version() since parsing the
2044 * configuration requires knowing the version number.
2046 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2047 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, parse
);
2048 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2053 ASSERT(spa
->spa_root_vdev
== rvd
);
2055 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2056 ASSERT(spa_guid(spa
) == pool_guid
);
2060 * Try to open all vdevs, loading each label in the process.
2062 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2063 error
= vdev_open(rvd
);
2064 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2069 * We need to validate the vdev labels against the configuration that
2070 * we have in hand, which is dependent on the setting of mosconfig. If
2071 * mosconfig is true then we're validating the vdev labels based on
2072 * that config. Otherwise, we're validating against the cached config
2073 * (zpool.cache) that was read when we loaded the zfs module, and then
2074 * later we will recursively call spa_load() and validate against
2077 * If we're assembling a new pool that's been split off from an
2078 * existing pool, the labels haven't yet been updated so we skip
2079 * validation for now.
2081 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2082 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2083 error
= vdev_validate(rvd
, mosconfig
);
2084 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2089 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2094 * Find the best uberblock.
2096 vdev_uberblock_load(rvd
, ub
, &label
);
2099 * If we weren't able to find a single valid uberblock, return failure.
2101 if (ub
->ub_txg
== 0) {
2103 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, ENXIO
));
2107 * If the pool has an unsupported version we can't open it.
2109 if (!SPA_VERSION_IS_SUPPORTED(ub
->ub_version
)) {
2111 return (spa_vdev_err(rvd
, VDEV_AUX_VERSION_NEWER
, ENOTSUP
));
2114 if (ub
->ub_version
>= SPA_VERSION_FEATURES
) {
2118 * If we weren't able to find what's necessary for reading the
2119 * MOS in the label, return failure.
2121 if (label
== NULL
|| nvlist_lookup_nvlist(label
,
2122 ZPOOL_CONFIG_FEATURES_FOR_READ
, &features
) != 0) {
2124 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2129 * Update our in-core representation with the definitive values
2132 nvlist_free(spa
->spa_label_features
);
2133 VERIFY(nvlist_dup(features
, &spa
->spa_label_features
, 0) == 0);
2139 * Look through entries in the label nvlist's features_for_read. If
2140 * there is a feature listed there which we don't understand then we
2141 * cannot open a pool.
2143 if (ub
->ub_version
>= SPA_VERSION_FEATURES
) {
2144 nvlist_t
*unsup_feat
;
2147 VERIFY(nvlist_alloc(&unsup_feat
, NV_UNIQUE_NAME
, KM_SLEEP
) ==
2150 for (nvp
= nvlist_next_nvpair(spa
->spa_label_features
, NULL
);
2152 nvp
= nvlist_next_nvpair(spa
->spa_label_features
, nvp
)) {
2153 if (!zfeature_is_supported(nvpair_name(nvp
))) {
2154 VERIFY(nvlist_add_string(unsup_feat
,
2155 nvpair_name(nvp
), "") == 0);
2159 if (!nvlist_empty(unsup_feat
)) {
2160 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
2161 ZPOOL_CONFIG_UNSUP_FEAT
, unsup_feat
) == 0);
2162 nvlist_free(unsup_feat
);
2163 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
,
2167 nvlist_free(unsup_feat
);
2171 * If the vdev guid sum doesn't match the uberblock, we have an
2172 * incomplete configuration. We first check to see if the pool
2173 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
2174 * If it is, defer the vdev_guid_sum check till later so we
2175 * can handle missing vdevs.
2177 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VDEV_CHILDREN
,
2178 &children
) != 0 && mosconfig
&& type
!= SPA_IMPORT_ASSEMBLE
&&
2179 rvd
->vdev_guid_sum
!= ub
->ub_guid_sum
)
2180 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
, ENXIO
));
2182 if (type
!= SPA_IMPORT_ASSEMBLE
&& spa
->spa_config_splitting
) {
2183 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2184 spa_try_repair(spa
, config
);
2185 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2186 nvlist_free(spa
->spa_config_splitting
);
2187 spa
->spa_config_splitting
= NULL
;
2191 * Initialize internal SPA structures.
2193 spa
->spa_state
= POOL_STATE_ACTIVE
;
2194 spa
->spa_ubsync
= spa
->spa_uberblock
;
2195 spa
->spa_verify_min_txg
= spa
->spa_extreme_rewind
?
2196 TXG_INITIAL
- 1 : spa_last_synced_txg(spa
) - TXG_DEFER_SIZE
- 1;
2197 spa
->spa_first_txg
= spa
->spa_last_ubsync_txg
?
2198 spa
->spa_last_ubsync_txg
: spa_last_synced_txg(spa
) + 1;
2199 spa
->spa_claim_max_txg
= spa
->spa_first_txg
;
2200 spa
->spa_prev_software_version
= ub
->ub_software_version
;
2202 error
= dsl_pool_init(spa
, spa
->spa_first_txg
, &spa
->spa_dsl_pool
);
2204 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2205 spa
->spa_meta_objset
= spa
->spa_dsl_pool
->dp_meta_objset
;
2207 if (spa_dir_prop(spa
, DMU_POOL_CONFIG
, &spa
->spa_config_object
) != 0)
2208 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2210 if (spa_version(spa
) >= SPA_VERSION_FEATURES
) {
2211 boolean_t missing_feat_read
= B_FALSE
;
2212 nvlist_t
*unsup_feat
;
2214 if (spa_dir_prop(spa
, DMU_POOL_FEATURES_FOR_READ
,
2215 &spa
->spa_feat_for_read_obj
) != 0) {
2216 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2219 if (spa_dir_prop(spa
, DMU_POOL_FEATURES_FOR_WRITE
,
2220 &spa
->spa_feat_for_write_obj
) != 0) {
2221 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2224 if (spa_dir_prop(spa
, DMU_POOL_FEATURE_DESCRIPTIONS
,
2225 &spa
->spa_feat_desc_obj
) != 0) {
2226 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2229 VERIFY(nvlist_alloc(&unsup_feat
, NV_UNIQUE_NAME
, KM_SLEEP
) ==
2232 if (!feature_is_supported(spa
->spa_meta_objset
,
2233 spa
->spa_feat_for_read_obj
, spa
->spa_feat_desc_obj
,
2235 missing_feat_read
= B_TRUE
;
2237 if (spa_writeable(spa
) || state
== SPA_LOAD_TRYIMPORT
) {
2238 if (!feature_is_supported(spa
->spa_meta_objset
,
2239 spa
->spa_feat_for_write_obj
, spa
->spa_feat_desc_obj
,
2241 missing_feat_write
= B_TRUE
;
2244 if (!nvlist_empty(unsup_feat
)) {
2245 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
2246 ZPOOL_CONFIG_UNSUP_FEAT
, unsup_feat
) == 0);
2249 nvlist_free(unsup_feat
);
2251 if (!missing_feat_read
) {
2252 fnvlist_add_boolean(spa
->spa_load_info
,
2253 ZPOOL_CONFIG_CAN_RDONLY
);
2257 * If the state is SPA_LOAD_TRYIMPORT, our objective is
2258 * twofold: to determine whether the pool is available for
2259 * import in read-write mode and (if it is not) whether the
2260 * pool is available for import in read-only mode. If the pool
2261 * is available for import in read-write mode, it is displayed
2262 * as available in userland; if it is not available for import
2263 * in read-only mode, it is displayed as unavailable in
2264 * userland. If the pool is available for import in read-only
2265 * mode but not read-write mode, it is displayed as unavailable
2266 * in userland with a special note that the pool is actually
2267 * available for open in read-only mode.
2269 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are
2270 * missing a feature for write, we must first determine whether
2271 * the pool can be opened read-only before returning to
2272 * userland in order to know whether to display the
2273 * abovementioned note.
2275 if (missing_feat_read
|| (missing_feat_write
&&
2276 spa_writeable(spa
))) {
2277 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
,
2282 spa
->spa_is_initializing
= B_TRUE
;
2283 error
= dsl_pool_open(spa
->spa_dsl_pool
);
2284 spa
->spa_is_initializing
= B_FALSE
;
2286 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2290 nvlist_t
*policy
= NULL
, *nvconfig
;
2292 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2293 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2295 if (!spa_is_root(spa
) && nvlist_lookup_uint64(nvconfig
,
2296 ZPOOL_CONFIG_HOSTID
, &hostid
) == 0) {
2298 unsigned long myhostid
= 0;
2300 VERIFY(nvlist_lookup_string(nvconfig
,
2301 ZPOOL_CONFIG_HOSTNAME
, &hostname
) == 0);
2304 myhostid
= zone_get_hostid(NULL
);
2307 * We're emulating the system's hostid in userland, so
2308 * we can't use zone_get_hostid().
2310 (void) ddi_strtoul(hw_serial
, NULL
, 10, &myhostid
);
2311 #endif /* _KERNEL */
2312 if (hostid
!= 0 && myhostid
!= 0 &&
2313 hostid
!= myhostid
) {
2314 nvlist_free(nvconfig
);
2315 cmn_err(CE_WARN
, "pool '%s' could not be "
2316 "loaded as it was last accessed by "
2317 "another system (host: %s hostid: 0x%lx). "
2318 "See: http://zfsonlinux.org/msg/ZFS-8000-EY",
2319 spa_name(spa
), hostname
,
2320 (unsigned long)hostid
);
2324 if (nvlist_lookup_nvlist(spa
->spa_config
,
2325 ZPOOL_REWIND_POLICY
, &policy
) == 0)
2326 VERIFY(nvlist_add_nvlist(nvconfig
,
2327 ZPOOL_REWIND_POLICY
, policy
) == 0);
2329 spa_config_set(spa
, nvconfig
);
2331 spa_deactivate(spa
);
2332 spa_activate(spa
, orig_mode
);
2334 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, B_TRUE
));
2337 if (spa_dir_prop(spa
, DMU_POOL_SYNC_BPOBJ
, &obj
) != 0)
2338 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2339 error
= bpobj_open(&spa
->spa_deferred_bpobj
, spa
->spa_meta_objset
, obj
);
2341 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2344 * Load the bit that tells us to use the new accounting function
2345 * (raid-z deflation). If we have an older pool, this will not
2348 error
= spa_dir_prop(spa
, DMU_POOL_DEFLATE
, &spa
->spa_deflate
);
2349 if (error
!= 0 && error
!= ENOENT
)
2350 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2352 error
= spa_dir_prop(spa
, DMU_POOL_CREATION_VERSION
,
2353 &spa
->spa_creation_version
);
2354 if (error
!= 0 && error
!= ENOENT
)
2355 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2358 * Load the persistent error log. If we have an older pool, this will
2361 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_LAST
, &spa
->spa_errlog_last
);
2362 if (error
!= 0 && error
!= ENOENT
)
2363 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2365 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_SCRUB
,
2366 &spa
->spa_errlog_scrub
);
2367 if (error
!= 0 && error
!= ENOENT
)
2368 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2371 * Load the history object. If we have an older pool, this
2372 * will not be present.
2374 error
= spa_dir_prop(spa
, DMU_POOL_HISTORY
, &spa
->spa_history
);
2375 if (error
!= 0 && error
!= ENOENT
)
2376 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2379 * If we're assembling the pool from the split-off vdevs of
2380 * an existing pool, we don't want to attach the spares & cache
2385 * Load any hot spares for this pool.
2387 error
= spa_dir_prop(spa
, DMU_POOL_SPARES
, &spa
->spa_spares
.sav_object
);
2388 if (error
!= 0 && error
!= ENOENT
)
2389 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2390 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2391 ASSERT(spa_version(spa
) >= SPA_VERSION_SPARES
);
2392 if (load_nvlist(spa
, spa
->spa_spares
.sav_object
,
2393 &spa
->spa_spares
.sav_config
) != 0)
2394 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2396 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2397 spa_load_spares(spa
);
2398 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2399 } else if (error
== 0) {
2400 spa
->spa_spares
.sav_sync
= B_TRUE
;
2404 * Load any level 2 ARC devices for this pool.
2406 error
= spa_dir_prop(spa
, DMU_POOL_L2CACHE
,
2407 &spa
->spa_l2cache
.sav_object
);
2408 if (error
!= 0 && error
!= ENOENT
)
2409 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2410 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2411 ASSERT(spa_version(spa
) >= SPA_VERSION_L2CACHE
);
2412 if (load_nvlist(spa
, spa
->spa_l2cache
.sav_object
,
2413 &spa
->spa_l2cache
.sav_config
) != 0)
2414 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2416 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2417 spa_load_l2cache(spa
);
2418 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2419 } else if (error
== 0) {
2420 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
2423 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
2425 error
= spa_dir_prop(spa
, DMU_POOL_PROPS
, &spa
->spa_pool_props_object
);
2426 if (error
&& error
!= ENOENT
)
2427 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2430 uint64_t autoreplace
;
2432 spa_prop_find(spa
, ZPOOL_PROP_BOOTFS
, &spa
->spa_bootfs
);
2433 spa_prop_find(spa
, ZPOOL_PROP_AUTOREPLACE
, &autoreplace
);
2434 spa_prop_find(spa
, ZPOOL_PROP_DELEGATION
, &spa
->spa_delegation
);
2435 spa_prop_find(spa
, ZPOOL_PROP_FAILUREMODE
, &spa
->spa_failmode
);
2436 spa_prop_find(spa
, ZPOOL_PROP_AUTOEXPAND
, &spa
->spa_autoexpand
);
2437 spa_prop_find(spa
, ZPOOL_PROP_DEDUPDITTO
,
2438 &spa
->spa_dedup_ditto
);
2440 spa
->spa_autoreplace
= (autoreplace
!= 0);
2444 * If the 'autoreplace' property is set, then post a resource notifying
2445 * the ZFS DE that it should not issue any faults for unopenable
2446 * devices. We also iterate over the vdevs, and post a sysevent for any
2447 * unopenable vdevs so that the normal autoreplace handler can take
2450 if (spa
->spa_autoreplace
&& state
!= SPA_LOAD_TRYIMPORT
) {
2451 spa_check_removed(spa
->spa_root_vdev
);
2453 * For the import case, this is done in spa_import(), because
2454 * at this point we're using the spare definitions from
2455 * the MOS config, not necessarily from the userland config.
2457 if (state
!= SPA_LOAD_IMPORT
) {
2458 spa_aux_check_removed(&spa
->spa_spares
);
2459 spa_aux_check_removed(&spa
->spa_l2cache
);
2464 * Load the vdev state for all toplevel vdevs.
2469 * Propagate the leaf DTLs we just loaded all the way up the tree.
2471 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2472 vdev_dtl_reassess(rvd
, 0, 0, B_FALSE
);
2473 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2476 * Load the DDTs (dedup tables).
2478 error
= ddt_load(spa
);
2480 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2482 spa_update_dspace(spa
);
2485 * Validate the config, using the MOS config to fill in any
2486 * information which might be missing. If we fail to validate
2487 * the config then declare the pool unfit for use. If we're
2488 * assembling a pool from a split, the log is not transferred
2491 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2494 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2495 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2497 if (!spa_config_valid(spa
, nvconfig
)) {
2498 nvlist_free(nvconfig
);
2499 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
,
2502 nvlist_free(nvconfig
);
2505 * Now that we've validated the config, check the state of the
2506 * root vdev. If it can't be opened, it indicates one or
2507 * more toplevel vdevs are faulted.
2509 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2512 if (spa_check_logs(spa
)) {
2513 *ereport
= FM_EREPORT_ZFS_LOG_REPLAY
;
2514 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_LOG
, ENXIO
));
2518 if (missing_feat_write
) {
2519 ASSERT(state
== SPA_LOAD_TRYIMPORT
);
2522 * At this point, we know that we can open the pool in
2523 * read-only mode but not read-write mode. We now have enough
2524 * information and can return to userland.
2526 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
, ENOTSUP
));
2530 * We've successfully opened the pool, verify that we're ready
2531 * to start pushing transactions.
2533 if (state
!= SPA_LOAD_TRYIMPORT
) {
2534 if ((error
= spa_load_verify(spa
)))
2535 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2539 if (spa_writeable(spa
) && (state
== SPA_LOAD_RECOVER
||
2540 spa
->spa_load_max_txg
== UINT64_MAX
)) {
2542 int need_update
= B_FALSE
;
2545 ASSERT(state
!= SPA_LOAD_TRYIMPORT
);
2548 * Claim log blocks that haven't been committed yet.
2549 * This must all happen in a single txg.
2550 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2551 * invoked from zil_claim_log_block()'s i/o done callback.
2552 * Price of rollback is that we abandon the log.
2554 spa
->spa_claiming
= B_TRUE
;
2556 tx
= dmu_tx_create_assigned(spa_get_dsl(spa
),
2557 spa_first_txg(spa
));
2558 (void) dmu_objset_find(spa_name(spa
),
2559 zil_claim
, tx
, DS_FIND_CHILDREN
);
2562 spa
->spa_claiming
= B_FALSE
;
2564 spa_set_log_state(spa
, SPA_LOG_GOOD
);
2565 spa
->spa_sync_on
= B_TRUE
;
2566 txg_sync_start(spa
->spa_dsl_pool
);
2569 * Wait for all claims to sync. We sync up to the highest
2570 * claimed log block birth time so that claimed log blocks
2571 * don't appear to be from the future. spa_claim_max_txg
2572 * will have been set for us by either zil_check_log_chain()
2573 * (invoked from spa_check_logs()) or zil_claim() above.
2575 txg_wait_synced(spa
->spa_dsl_pool
, spa
->spa_claim_max_txg
);
2578 * If the config cache is stale, or we have uninitialized
2579 * metaslabs (see spa_vdev_add()), then update the config.
2581 * If this is a verbatim import, trust the current
2582 * in-core spa_config and update the disk labels.
2584 if (config_cache_txg
!= spa
->spa_config_txg
||
2585 state
== SPA_LOAD_IMPORT
||
2586 state
== SPA_LOAD_RECOVER
||
2587 (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
))
2588 need_update
= B_TRUE
;
2590 for (c
= 0; c
< rvd
->vdev_children
; c
++)
2591 if (rvd
->vdev_child
[c
]->vdev_ms_array
== 0)
2592 need_update
= B_TRUE
;
2595 * Update the config cache asychronously in case we're the
2596 * root pool, in which case the config cache isn't writable yet.
2599 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
2602 * Check all DTLs to see if anything needs resilvering.
2604 if (!dsl_scan_resilvering(spa
->spa_dsl_pool
) &&
2605 vdev_resilver_needed(rvd
, NULL
, NULL
))
2606 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
2609 * Delete any inconsistent datasets.
2611 (void) dmu_objset_find(spa_name(spa
),
2612 dsl_destroy_inconsistent
, NULL
, DS_FIND_CHILDREN
);
2615 * Clean up any stale temporary dataset userrefs.
2617 dsl_pool_clean_tmp_userrefs(spa
->spa_dsl_pool
);
2624 spa_load_retry(spa_t
*spa
, spa_load_state_t state
, int mosconfig
)
2626 int mode
= spa
->spa_mode
;
2629 spa_deactivate(spa
);
2631 spa
->spa_load_max_txg
--;
2633 spa_activate(spa
, mode
);
2634 spa_async_suspend(spa
);
2636 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, mosconfig
));
2640 * If spa_load() fails this function will try loading prior txg's. If
2641 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool
2642 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this
2643 * function will not rewind the pool and will return the same error as
2647 spa_load_best(spa_t
*spa
, spa_load_state_t state
, int mosconfig
,
2648 uint64_t max_request
, int rewind_flags
)
2650 nvlist_t
*loadinfo
= NULL
;
2651 nvlist_t
*config
= NULL
;
2652 int load_error
, rewind_error
;
2653 uint64_t safe_rewind_txg
;
2656 if (spa
->spa_load_txg
&& state
== SPA_LOAD_RECOVER
) {
2657 spa
->spa_load_max_txg
= spa
->spa_load_txg
;
2658 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2660 spa
->spa_load_max_txg
= max_request
;
2663 load_error
= rewind_error
= spa_load(spa
, state
, SPA_IMPORT_EXISTING
,
2665 if (load_error
== 0)
2668 if (spa
->spa_root_vdev
!= NULL
)
2669 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2671 spa
->spa_last_ubsync_txg
= spa
->spa_uberblock
.ub_txg
;
2672 spa
->spa_last_ubsync_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
2674 if (rewind_flags
& ZPOOL_NEVER_REWIND
) {
2675 nvlist_free(config
);
2676 return (load_error
);
2679 if (state
== SPA_LOAD_RECOVER
) {
2680 /* Price of rolling back is discarding txgs, including log */
2681 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2684 * If we aren't rolling back save the load info from our first
2685 * import attempt so that we can restore it after attempting
2688 loadinfo
= spa
->spa_load_info
;
2689 spa
->spa_load_info
= fnvlist_alloc();
2692 spa
->spa_load_max_txg
= spa
->spa_last_ubsync_txg
;
2693 safe_rewind_txg
= spa
->spa_last_ubsync_txg
- TXG_DEFER_SIZE
;
2694 min_txg
= (rewind_flags
& ZPOOL_EXTREME_REWIND
) ?
2695 TXG_INITIAL
: safe_rewind_txg
;
2698 * Continue as long as we're finding errors, we're still within
2699 * the acceptable rewind range, and we're still finding uberblocks
2701 while (rewind_error
&& spa
->spa_uberblock
.ub_txg
>= min_txg
&&
2702 spa
->spa_uberblock
.ub_txg
<= spa
->spa_load_max_txg
) {
2703 if (spa
->spa_load_max_txg
< safe_rewind_txg
)
2704 spa
->spa_extreme_rewind
= B_TRUE
;
2705 rewind_error
= spa_load_retry(spa
, state
, mosconfig
);
2708 spa
->spa_extreme_rewind
= B_FALSE
;
2709 spa
->spa_load_max_txg
= UINT64_MAX
;
2711 if (config
&& (rewind_error
|| state
!= SPA_LOAD_RECOVER
))
2712 spa_config_set(spa
, config
);
2714 if (state
== SPA_LOAD_RECOVER
) {
2715 ASSERT3P(loadinfo
, ==, NULL
);
2716 return (rewind_error
);
2718 /* Store the rewind info as part of the initial load info */
2719 fnvlist_add_nvlist(loadinfo
, ZPOOL_CONFIG_REWIND_INFO
,
2720 spa
->spa_load_info
);
2722 /* Restore the initial load info */
2723 fnvlist_free(spa
->spa_load_info
);
2724 spa
->spa_load_info
= loadinfo
;
2726 return (load_error
);
2733 * The import case is identical to an open except that the configuration is sent
2734 * down from userland, instead of grabbed from the configuration cache. For the
2735 * case of an open, the pool configuration will exist in the
2736 * POOL_STATE_UNINITIALIZED state.
2738 * The stats information (gen/count/ustats) is used to gather vdev statistics at
2739 * the same time open the pool, without having to keep around the spa_t in some
2743 spa_open_common(const char *pool
, spa_t
**spapp
, void *tag
, nvlist_t
*nvpolicy
,
2747 spa_load_state_t state
= SPA_LOAD_OPEN
;
2749 int locked
= B_FALSE
;
2754 * As disgusting as this is, we need to support recursive calls to this
2755 * function because dsl_dir_open() is called during spa_load(), and ends
2756 * up calling spa_open() again. The real fix is to figure out how to
2757 * avoid dsl_dir_open() calling this in the first place.
2759 if (mutex_owner(&spa_namespace_lock
) != curthread
) {
2760 mutex_enter(&spa_namespace_lock
);
2764 if ((spa
= spa_lookup(pool
)) == NULL
) {
2766 mutex_exit(&spa_namespace_lock
);
2770 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
) {
2771 zpool_rewind_policy_t policy
;
2773 zpool_get_rewind_policy(nvpolicy
? nvpolicy
: spa
->spa_config
,
2775 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
2776 state
= SPA_LOAD_RECOVER
;
2778 spa_activate(spa
, spa_mode_global
);
2780 if (state
!= SPA_LOAD_RECOVER
)
2781 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
2783 error
= spa_load_best(spa
, state
, B_FALSE
, policy
.zrp_txg
,
2784 policy
.zrp_request
);
2786 if (error
== EBADF
) {
2788 * If vdev_validate() returns failure (indicated by
2789 * EBADF), it indicates that one of the vdevs indicates
2790 * that the pool has been exported or destroyed. If
2791 * this is the case, the config cache is out of sync and
2792 * we should remove the pool from the namespace.
2795 spa_deactivate(spa
);
2796 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
2799 mutex_exit(&spa_namespace_lock
);
2805 * We can't open the pool, but we still have useful
2806 * information: the state of each vdev after the
2807 * attempted vdev_open(). Return this to the user.
2809 if (config
!= NULL
&& spa
->spa_config
) {
2810 VERIFY(nvlist_dup(spa
->spa_config
, config
,
2812 VERIFY(nvlist_add_nvlist(*config
,
2813 ZPOOL_CONFIG_LOAD_INFO
,
2814 spa
->spa_load_info
) == 0);
2817 spa_deactivate(spa
);
2818 spa
->spa_last_open_failed
= error
;
2820 mutex_exit(&spa_namespace_lock
);
2826 spa_open_ref(spa
, tag
);
2829 *config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2832 * If we've recovered the pool, pass back any information we
2833 * gathered while doing the load.
2835 if (state
== SPA_LOAD_RECOVER
) {
2836 VERIFY(nvlist_add_nvlist(*config
, ZPOOL_CONFIG_LOAD_INFO
,
2837 spa
->spa_load_info
) == 0);
2841 spa
->spa_last_open_failed
= 0;
2842 spa
->spa_last_ubsync_txg
= 0;
2843 spa
->spa_load_txg
= 0;
2844 mutex_exit(&spa_namespace_lock
);
2853 spa_open_rewind(const char *name
, spa_t
**spapp
, void *tag
, nvlist_t
*policy
,
2856 return (spa_open_common(name
, spapp
, tag
, policy
, config
));
2860 spa_open(const char *name
, spa_t
**spapp
, void *tag
)
2862 return (spa_open_common(name
, spapp
, tag
, NULL
, NULL
));
2866 * Lookup the given spa_t, incrementing the inject count in the process,
2867 * preventing it from being exported or destroyed.
2870 spa_inject_addref(char *name
)
2874 mutex_enter(&spa_namespace_lock
);
2875 if ((spa
= spa_lookup(name
)) == NULL
) {
2876 mutex_exit(&spa_namespace_lock
);
2879 spa
->spa_inject_ref
++;
2880 mutex_exit(&spa_namespace_lock
);
2886 spa_inject_delref(spa_t
*spa
)
2888 mutex_enter(&spa_namespace_lock
);
2889 spa
->spa_inject_ref
--;
2890 mutex_exit(&spa_namespace_lock
);
2894 * Add spares device information to the nvlist.
2897 spa_add_spares(spa_t
*spa
, nvlist_t
*config
)
2907 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2909 if (spa
->spa_spares
.sav_count
== 0)
2912 VERIFY(nvlist_lookup_nvlist(config
,
2913 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2914 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
2915 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2917 VERIFY(nvlist_add_nvlist_array(nvroot
,
2918 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
2919 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2920 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2923 * Go through and find any spares which have since been
2924 * repurposed as an active spare. If this is the case, update
2925 * their status appropriately.
2927 for (i
= 0; i
< nspares
; i
++) {
2928 VERIFY(nvlist_lookup_uint64(spares
[i
],
2929 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2930 if (spa_spare_exists(guid
, &pool
, NULL
) &&
2932 VERIFY(nvlist_lookup_uint64_array(
2933 spares
[i
], ZPOOL_CONFIG_VDEV_STATS
,
2934 (uint64_t **)&vs
, &vsc
) == 0);
2935 vs
->vs_state
= VDEV_STATE_CANT_OPEN
;
2936 vs
->vs_aux
= VDEV_AUX_SPARED
;
2943 * Add l2cache device information to the nvlist, including vdev stats.
2946 spa_add_l2cache(spa_t
*spa
, nvlist_t
*config
)
2949 uint_t i
, j
, nl2cache
;
2956 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2958 if (spa
->spa_l2cache
.sav_count
== 0)
2961 VERIFY(nvlist_lookup_nvlist(config
,
2962 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2963 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
2964 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2965 if (nl2cache
!= 0) {
2966 VERIFY(nvlist_add_nvlist_array(nvroot
,
2967 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
2968 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2969 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2972 * Update level 2 cache device stats.
2975 for (i
= 0; i
< nl2cache
; i
++) {
2976 VERIFY(nvlist_lookup_uint64(l2cache
[i
],
2977 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2980 for (j
= 0; j
< spa
->spa_l2cache
.sav_count
; j
++) {
2982 spa
->spa_l2cache
.sav_vdevs
[j
]->vdev_guid
) {
2983 vd
= spa
->spa_l2cache
.sav_vdevs
[j
];
2989 VERIFY(nvlist_lookup_uint64_array(l2cache
[i
],
2990 ZPOOL_CONFIG_VDEV_STATS
, (uint64_t **)&vs
, &vsc
)
2992 vdev_get_stats(vd
, vs
);
2998 spa_add_feature_stats(spa_t
*spa
, nvlist_t
*config
)
3004 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
3005 VERIFY(nvlist_alloc(&features
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3007 if (spa
->spa_feat_for_read_obj
!= 0) {
3008 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
3009 spa
->spa_feat_for_read_obj
);
3010 zap_cursor_retrieve(&zc
, &za
) == 0;
3011 zap_cursor_advance(&zc
)) {
3012 ASSERT(za
.za_integer_length
== sizeof (uint64_t) &&
3013 za
.za_num_integers
== 1);
3014 VERIFY3U(0, ==, nvlist_add_uint64(features
, za
.za_name
,
3015 za
.za_first_integer
));
3017 zap_cursor_fini(&zc
);
3020 if (spa
->spa_feat_for_write_obj
!= 0) {
3021 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
3022 spa
->spa_feat_for_write_obj
);
3023 zap_cursor_retrieve(&zc
, &za
) == 0;
3024 zap_cursor_advance(&zc
)) {
3025 ASSERT(za
.za_integer_length
== sizeof (uint64_t) &&
3026 za
.za_num_integers
== 1);
3027 VERIFY3U(0, ==, nvlist_add_uint64(features
, za
.za_name
,
3028 za
.za_first_integer
));
3030 zap_cursor_fini(&zc
);
3033 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_FEATURE_STATS
,
3035 nvlist_free(features
);
3039 spa_get_stats(const char *name
, nvlist_t
**config
,
3040 char *altroot
, size_t buflen
)
3046 error
= spa_open_common(name
, &spa
, FTAG
, NULL
, config
);
3050 * This still leaves a window of inconsistency where the spares
3051 * or l2cache devices could change and the config would be
3052 * self-inconsistent.
3054 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3056 if (*config
!= NULL
) {
3057 uint64_t loadtimes
[2];
3059 loadtimes
[0] = spa
->spa_loaded_ts
.tv_sec
;
3060 loadtimes
[1] = spa
->spa_loaded_ts
.tv_nsec
;
3061 VERIFY(nvlist_add_uint64_array(*config
,
3062 ZPOOL_CONFIG_LOADED_TIME
, loadtimes
, 2) == 0);
3064 VERIFY(nvlist_add_uint64(*config
,
3065 ZPOOL_CONFIG_ERRCOUNT
,
3066 spa_get_errlog_size(spa
)) == 0);
3068 if (spa_suspended(spa
))
3069 VERIFY(nvlist_add_uint64(*config
,
3070 ZPOOL_CONFIG_SUSPENDED
,
3071 spa
->spa_failmode
) == 0);
3073 spa_add_spares(spa
, *config
);
3074 spa_add_l2cache(spa
, *config
);
3075 spa_add_feature_stats(spa
, *config
);
3080 * We want to get the alternate root even for faulted pools, so we cheat
3081 * and call spa_lookup() directly.
3085 mutex_enter(&spa_namespace_lock
);
3086 spa
= spa_lookup(name
);
3088 spa_altroot(spa
, altroot
, buflen
);
3092 mutex_exit(&spa_namespace_lock
);
3094 spa_altroot(spa
, altroot
, buflen
);
3099 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3100 spa_close(spa
, FTAG
);
3107 * Validate that the auxiliary device array is well formed. We must have an
3108 * array of nvlists, each which describes a valid leaf vdev. If this is an
3109 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
3110 * specified, as long as they are well-formed.
3113 spa_validate_aux_devs(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
,
3114 spa_aux_vdev_t
*sav
, const char *config
, uint64_t version
,
3115 vdev_labeltype_t label
)
3122 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
3125 * It's acceptable to have no devs specified.
3127 if (nvlist_lookup_nvlist_array(nvroot
, config
, &dev
, &ndev
) != 0)
3134 * Make sure the pool is formatted with a version that supports this
3137 if (spa_version(spa
) < version
)
3141 * Set the pending device list so we correctly handle device in-use
3144 sav
->sav_pending
= dev
;
3145 sav
->sav_npending
= ndev
;
3147 for (i
= 0; i
< ndev
; i
++) {
3148 if ((error
= spa_config_parse(spa
, &vd
, dev
[i
], NULL
, 0,
3152 if (!vd
->vdev_ops
->vdev_op_leaf
) {
3159 * The L2ARC currently only supports disk devices in
3160 * kernel context. For user-level testing, we allow it.
3163 if ((strcmp(config
, ZPOOL_CONFIG_L2CACHE
) == 0) &&
3164 strcmp(vd
->vdev_ops
->vdev_op_type
, VDEV_TYPE_DISK
) != 0) {
3172 if ((error
= vdev_open(vd
)) == 0 &&
3173 (error
= vdev_label_init(vd
, crtxg
, label
)) == 0) {
3174 VERIFY(nvlist_add_uint64(dev
[i
], ZPOOL_CONFIG_GUID
,
3175 vd
->vdev_guid
) == 0);
3181 (mode
!= VDEV_ALLOC_SPARE
&& mode
!= VDEV_ALLOC_L2CACHE
))
3188 sav
->sav_pending
= NULL
;
3189 sav
->sav_npending
= 0;
3194 spa_validate_aux(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
)
3198 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
3200 if ((error
= spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
3201 &spa
->spa_spares
, ZPOOL_CONFIG_SPARES
, SPA_VERSION_SPARES
,
3202 VDEV_LABEL_SPARE
)) != 0) {
3206 return (spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
3207 &spa
->spa_l2cache
, ZPOOL_CONFIG_L2CACHE
, SPA_VERSION_L2CACHE
,
3208 VDEV_LABEL_L2CACHE
));
3212 spa_set_aux_vdevs(spa_aux_vdev_t
*sav
, nvlist_t
**devs
, int ndevs
,
3217 if (sav
->sav_config
!= NULL
) {
3223 * Generate new dev list by concatentating with the
3226 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
, config
,
3227 &olddevs
, &oldndevs
) == 0);
3229 newdevs
= kmem_alloc(sizeof (void *) *
3230 (ndevs
+ oldndevs
), KM_PUSHPAGE
);
3231 for (i
= 0; i
< oldndevs
; i
++)
3232 VERIFY(nvlist_dup(olddevs
[i
], &newdevs
[i
],
3234 for (i
= 0; i
< ndevs
; i
++)
3235 VERIFY(nvlist_dup(devs
[i
], &newdevs
[i
+ oldndevs
],
3238 VERIFY(nvlist_remove(sav
->sav_config
, config
,
3239 DATA_TYPE_NVLIST_ARRAY
) == 0);
3241 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
3242 config
, newdevs
, ndevs
+ oldndevs
) == 0);
3243 for (i
= 0; i
< oldndevs
+ ndevs
; i
++)
3244 nvlist_free(newdevs
[i
]);
3245 kmem_free(newdevs
, (oldndevs
+ ndevs
) * sizeof (void *));
3248 * Generate a new dev list.
3250 VERIFY(nvlist_alloc(&sav
->sav_config
, NV_UNIQUE_NAME
,
3252 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
, config
,
3258 * Stop and drop level 2 ARC devices
3261 spa_l2cache_drop(spa_t
*spa
)
3265 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
3267 for (i
= 0; i
< sav
->sav_count
; i
++) {
3270 vd
= sav
->sav_vdevs
[i
];
3273 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
3274 pool
!= 0ULL && l2arc_vdev_present(vd
))
3275 l2arc_remove_vdev(vd
);
3283 spa_create(const char *pool
, nvlist_t
*nvroot
, nvlist_t
*props
,
3284 const char *history_str
, nvlist_t
*zplprops
)
3287 char *altroot
= NULL
;
3292 uint64_t txg
= TXG_INITIAL
;
3293 nvlist_t
**spares
, **l2cache
;
3294 uint_t nspares
, nl2cache
;
3295 uint64_t version
, obj
;
3296 boolean_t has_features
;
3301 * If this pool already exists, return failure.
3303 mutex_enter(&spa_namespace_lock
);
3304 if (spa_lookup(pool
) != NULL
) {
3305 mutex_exit(&spa_namespace_lock
);
3310 * Allocate a new spa_t structure.
3312 (void) nvlist_lookup_string(props
,
3313 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3314 spa
= spa_add(pool
, NULL
, altroot
);
3315 spa_activate(spa
, spa_mode_global
);
3317 if (props
&& (error
= spa_prop_validate(spa
, props
))) {
3318 spa_deactivate(spa
);
3320 mutex_exit(&spa_namespace_lock
);
3324 has_features
= B_FALSE
;
3325 for (elem
= nvlist_next_nvpair(props
, NULL
);
3326 elem
!= NULL
; elem
= nvlist_next_nvpair(props
, elem
)) {
3327 if (zpool_prop_feature(nvpair_name(elem
)))
3328 has_features
= B_TRUE
;
3331 if (has_features
|| nvlist_lookup_uint64(props
,
3332 zpool_prop_to_name(ZPOOL_PROP_VERSION
), &version
) != 0) {
3333 version
= SPA_VERSION
;
3335 ASSERT(SPA_VERSION_IS_SUPPORTED(version
));
3337 spa
->spa_first_txg
= txg
;
3338 spa
->spa_uberblock
.ub_txg
= txg
- 1;
3339 spa
->spa_uberblock
.ub_version
= version
;
3340 spa
->spa_ubsync
= spa
->spa_uberblock
;
3343 * Create "The Godfather" zio to hold all async IOs
3345 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
3346 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
3349 * Create the root vdev.
3351 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3353 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, VDEV_ALLOC_ADD
);
3355 ASSERT(error
!= 0 || rvd
!= NULL
);
3356 ASSERT(error
!= 0 || spa
->spa_root_vdev
== rvd
);
3358 if (error
== 0 && !zfs_allocatable_devs(nvroot
))
3362 (error
= vdev_create(rvd
, txg
, B_FALSE
)) == 0 &&
3363 (error
= spa_validate_aux(spa
, nvroot
, txg
,
3364 VDEV_ALLOC_ADD
)) == 0) {
3365 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
3366 vdev_metaslab_set_size(rvd
->vdev_child
[c
]);
3367 vdev_expand(rvd
->vdev_child
[c
], txg
);
3371 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3375 spa_deactivate(spa
);
3377 mutex_exit(&spa_namespace_lock
);
3382 * Get the list of spares, if specified.
3384 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3385 &spares
, &nspares
) == 0) {
3386 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
, NV_UNIQUE_NAME
,
3388 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3389 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3390 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3391 spa_load_spares(spa
);
3392 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3393 spa
->spa_spares
.sav_sync
= B_TRUE
;
3397 * Get the list of level 2 cache devices, if specified.
3399 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3400 &l2cache
, &nl2cache
) == 0) {
3401 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3402 NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
3403 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3404 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3405 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3406 spa_load_l2cache(spa
);
3407 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3408 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3411 spa
->spa_is_initializing
= B_TRUE
;
3412 spa
->spa_dsl_pool
= dp
= dsl_pool_create(spa
, zplprops
, txg
);
3413 spa
->spa_meta_objset
= dp
->dp_meta_objset
;
3414 spa
->spa_is_initializing
= B_FALSE
;
3417 * Create DDTs (dedup tables).
3421 spa_update_dspace(spa
);
3423 tx
= dmu_tx_create_assigned(dp
, txg
);
3426 * Create the pool config object.
3428 spa
->spa_config_object
= dmu_object_alloc(spa
->spa_meta_objset
,
3429 DMU_OT_PACKED_NVLIST
, SPA_CONFIG_BLOCKSIZE
,
3430 DMU_OT_PACKED_NVLIST_SIZE
, sizeof (uint64_t), tx
);
3432 if (zap_add(spa
->spa_meta_objset
,
3433 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CONFIG
,
3434 sizeof (uint64_t), 1, &spa
->spa_config_object
, tx
) != 0) {
3435 cmn_err(CE_PANIC
, "failed to add pool config");
3438 if (spa_version(spa
) >= SPA_VERSION_FEATURES
)
3439 spa_feature_create_zap_objects(spa
, tx
);
3441 if (zap_add(spa
->spa_meta_objset
,
3442 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CREATION_VERSION
,
3443 sizeof (uint64_t), 1, &version
, tx
) != 0) {
3444 cmn_err(CE_PANIC
, "failed to add pool version");
3447 /* Newly created pools with the right version are always deflated. */
3448 if (version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
3449 spa
->spa_deflate
= TRUE
;
3450 if (zap_add(spa
->spa_meta_objset
,
3451 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
3452 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
) != 0) {
3453 cmn_err(CE_PANIC
, "failed to add deflate");
3458 * Create the deferred-free bpobj. Turn off compression
3459 * because sync-to-convergence takes longer if the blocksize
3462 obj
= bpobj_alloc(spa
->spa_meta_objset
, 1 << 14, tx
);
3463 dmu_object_set_compress(spa
->spa_meta_objset
, obj
,
3464 ZIO_COMPRESS_OFF
, tx
);
3465 if (zap_add(spa
->spa_meta_objset
,
3466 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_SYNC_BPOBJ
,
3467 sizeof (uint64_t), 1, &obj
, tx
) != 0) {
3468 cmn_err(CE_PANIC
, "failed to add bpobj");
3470 VERIFY3U(0, ==, bpobj_open(&spa
->spa_deferred_bpobj
,
3471 spa
->spa_meta_objset
, obj
));
3474 * Create the pool's history object.
3476 if (version
>= SPA_VERSION_ZPOOL_HISTORY
)
3477 spa_history_create_obj(spa
, tx
);
3480 * Set pool properties.
3482 spa
->spa_bootfs
= zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS
);
3483 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
3484 spa
->spa_failmode
= zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE
);
3485 spa
->spa_autoexpand
= zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND
);
3487 if (props
!= NULL
) {
3488 spa_configfile_set(spa
, props
, B_FALSE
);
3489 spa_sync_props(spa
, props
, tx
);
3494 spa
->spa_sync_on
= B_TRUE
;
3495 txg_sync_start(spa
->spa_dsl_pool
);
3498 * We explicitly wait for the first transaction to complete so that our
3499 * bean counters are appropriately updated.
3501 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
3503 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3505 if (version
>= SPA_VERSION_ZPOOL_HISTORY
&& history_str
!= NULL
)
3506 (void) spa_history_log(spa
, history_str
, LOG_CMD_POOL_CREATE
);
3507 spa_history_log_version(spa
, LOG_POOL_CREATE
);
3509 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
3511 mutex_exit(&spa_namespace_lock
);
3518 * Get the root pool information from the root disk, then import the root pool
3519 * during the system boot up time.
3521 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t
**);
3524 spa_generate_rootconf(char *devpath
, char *devid
, uint64_t *guid
)
3527 nvlist_t
*nvtop
, *nvroot
;
3530 if (vdev_disk_read_rootlabel(devpath
, devid
, &config
) != 0)
3534 * Add this top-level vdev to the child array.
3536 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3538 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
3540 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_GUID
, guid
) == 0);
3543 * Put this pool's top-level vdevs into a root vdev.
3545 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
3546 VERIFY(nvlist_add_string(nvroot
, ZPOOL_CONFIG_TYPE
,
3547 VDEV_TYPE_ROOT
) == 0);
3548 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_ID
, 0ULL) == 0);
3549 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_GUID
, pgid
) == 0);
3550 VERIFY(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
3554 * Replace the existing vdev_tree with the new root vdev in
3555 * this pool's configuration (remove the old, add the new).
3557 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, nvroot
) == 0);
3558 nvlist_free(nvroot
);
3563 * Walk the vdev tree and see if we can find a device with "better"
3564 * configuration. A configuration is "better" if the label on that
3565 * device has a more recent txg.
3568 spa_alt_rootvdev(vdev_t
*vd
, vdev_t
**avd
, uint64_t *txg
)
3572 for (c
= 0; c
< vd
->vdev_children
; c
++)
3573 spa_alt_rootvdev(vd
->vdev_child
[c
], avd
, txg
);
3575 if (vd
->vdev_ops
->vdev_op_leaf
) {
3579 if (vdev_disk_read_rootlabel(vd
->vdev_physpath
, vd
->vdev_devid
,
3583 VERIFY(nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_TXG
,
3587 * Do we have a better boot device?
3589 if (label_txg
> *txg
) {
3598 * Import a root pool.
3600 * For x86. devpath_list will consist of devid and/or physpath name of
3601 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3602 * The GRUB "findroot" command will return the vdev we should boot.
3604 * For Sparc, devpath_list consists the physpath name of the booting device
3605 * no matter the rootpool is a single device pool or a mirrored pool.
3607 * "/pci@1f,0/ide@d/disk@0,0:a"
3610 spa_import_rootpool(char *devpath
, char *devid
)
3613 vdev_t
*rvd
, *bvd
, *avd
= NULL
;
3614 nvlist_t
*config
, *nvtop
;
3620 * Read the label from the boot device and generate a configuration.
3622 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3623 #if defined(_OBP) && defined(_KERNEL)
3624 if (config
== NULL
) {
3625 if (strstr(devpath
, "/iscsi/ssd") != NULL
) {
3627 get_iscsi_bootpath_phy(devpath
);
3628 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3632 if (config
== NULL
) {
3633 cmn_err(CE_NOTE
, "Cannot read the pool label from '%s'",
3638 VERIFY(nvlist_lookup_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3640 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
, &txg
) == 0);
3642 mutex_enter(&spa_namespace_lock
);
3643 if ((spa
= spa_lookup(pname
)) != NULL
) {
3645 * Remove the existing root pool from the namespace so that we
3646 * can replace it with the correct config we just read in.
3651 spa
= spa_add(pname
, config
, NULL
);
3652 spa
->spa_is_root
= B_TRUE
;
3653 spa
->spa_import_flags
= ZFS_IMPORT_VERBATIM
;
3656 * Build up a vdev tree based on the boot device's label config.
3658 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3660 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3661 error
= spa_config_parse(spa
, &rvd
, nvtop
, NULL
, 0,
3662 VDEV_ALLOC_ROOTPOOL
);
3663 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3665 mutex_exit(&spa_namespace_lock
);
3666 nvlist_free(config
);
3667 cmn_err(CE_NOTE
, "Can not parse the config for pool '%s'",
3673 * Get the boot vdev.
3675 if ((bvd
= vdev_lookup_by_guid(rvd
, guid
)) == NULL
) {
3676 cmn_err(CE_NOTE
, "Can not find the boot vdev for guid %llu",
3677 (u_longlong_t
)guid
);
3683 * Determine if there is a better boot device.
3686 spa_alt_rootvdev(rvd
, &avd
, &txg
);
3688 cmn_err(CE_NOTE
, "The boot device is 'degraded'. Please "
3689 "try booting from '%s'", avd
->vdev_path
);
3695 * If the boot device is part of a spare vdev then ensure that
3696 * we're booting off the active spare.
3698 if (bvd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
3699 !bvd
->vdev_isspare
) {
3700 cmn_err(CE_NOTE
, "The boot device is currently spared. Please "
3701 "try booting from '%s'",
3703 vdev_child
[bvd
->vdev_parent
->vdev_children
- 1]->vdev_path
);
3709 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3711 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3713 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3714 mutex_exit(&spa_namespace_lock
);
3716 nvlist_free(config
);
3723 * Import a non-root pool into the system.
3726 spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
, uint64_t flags
)
3729 char *altroot
= NULL
;
3730 spa_load_state_t state
= SPA_LOAD_IMPORT
;
3731 zpool_rewind_policy_t policy
;
3732 uint64_t mode
= spa_mode_global
;
3733 uint64_t readonly
= B_FALSE
;
3736 nvlist_t
**spares
, **l2cache
;
3737 uint_t nspares
, nl2cache
;
3740 * If a pool with this name exists, return failure.
3742 mutex_enter(&spa_namespace_lock
);
3743 if (spa_lookup(pool
) != NULL
) {
3744 mutex_exit(&spa_namespace_lock
);
3749 * Create and initialize the spa structure.
3751 (void) nvlist_lookup_string(props
,
3752 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3753 (void) nvlist_lookup_uint64(props
,
3754 zpool_prop_to_name(ZPOOL_PROP_READONLY
), &readonly
);
3757 spa
= spa_add(pool
, config
, altroot
);
3758 spa
->spa_import_flags
= flags
;
3761 * Verbatim import - Take a pool and insert it into the namespace
3762 * as if it had been loaded at boot.
3764 if (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) {
3766 spa_configfile_set(spa
, props
, B_FALSE
);
3768 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3770 mutex_exit(&spa_namespace_lock
);
3771 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3776 spa_activate(spa
, mode
);
3779 * Don't start async tasks until we know everything is healthy.
3781 spa_async_suspend(spa
);
3783 zpool_get_rewind_policy(config
, &policy
);
3784 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
3785 state
= SPA_LOAD_RECOVER
;
3788 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
3789 * because the user-supplied config is actually the one to trust when
3792 if (state
!= SPA_LOAD_RECOVER
)
3793 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
3795 error
= spa_load_best(spa
, state
, B_TRUE
, policy
.zrp_txg
,
3796 policy
.zrp_request
);
3799 * Propagate anything learned while loading the pool and pass it
3800 * back to caller (i.e. rewind info, missing devices, etc).
3802 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
3803 spa
->spa_load_info
) == 0);
3805 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3807 * Toss any existing sparelist, as it doesn't have any validity
3808 * anymore, and conflicts with spa_has_spare().
3810 if (spa
->spa_spares
.sav_config
) {
3811 nvlist_free(spa
->spa_spares
.sav_config
);
3812 spa
->spa_spares
.sav_config
= NULL
;
3813 spa_load_spares(spa
);
3815 if (spa
->spa_l2cache
.sav_config
) {
3816 nvlist_free(spa
->spa_l2cache
.sav_config
);
3817 spa
->spa_l2cache
.sav_config
= NULL
;
3818 spa_load_l2cache(spa
);
3821 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3824 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3827 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3828 VDEV_ALLOC_L2CACHE
);
3829 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3832 spa_configfile_set(spa
, props
, B_FALSE
);
3834 if (error
!= 0 || (props
&& spa_writeable(spa
) &&
3835 (error
= spa_prop_set(spa
, props
)))) {
3837 spa_deactivate(spa
);
3839 mutex_exit(&spa_namespace_lock
);
3843 spa_async_resume(spa
);
3846 * Override any spares and level 2 cache devices as specified by
3847 * the user, as these may have correct device names/devids, etc.
3849 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3850 &spares
, &nspares
) == 0) {
3851 if (spa
->spa_spares
.sav_config
)
3852 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
,
3853 ZPOOL_CONFIG_SPARES
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3855 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
,
3856 NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
3857 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3858 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3859 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3860 spa_load_spares(spa
);
3861 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3862 spa
->spa_spares
.sav_sync
= B_TRUE
;
3864 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3865 &l2cache
, &nl2cache
) == 0) {
3866 if (spa
->spa_l2cache
.sav_config
)
3867 VERIFY(nvlist_remove(spa
->spa_l2cache
.sav_config
,
3868 ZPOOL_CONFIG_L2CACHE
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3870 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3871 NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
3872 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3873 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3874 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3875 spa_load_l2cache(spa
);
3876 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3877 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3881 * Check for any removed devices.
3883 if (spa
->spa_autoreplace
) {
3884 spa_aux_check_removed(&spa
->spa_spares
);
3885 spa_aux_check_removed(&spa
->spa_l2cache
);
3888 if (spa_writeable(spa
)) {
3890 * Update the config cache to include the newly-imported pool.
3892 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
3896 * It's possible that the pool was expanded while it was exported.
3897 * We kick off an async task to handle this for us.
3899 spa_async_request(spa
, SPA_ASYNC_AUTOEXPAND
);
3901 mutex_exit(&spa_namespace_lock
);
3902 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3908 spa_tryimport(nvlist_t
*tryconfig
)
3910 nvlist_t
*config
= NULL
;
3916 if (nvlist_lookup_string(tryconfig
, ZPOOL_CONFIG_POOL_NAME
, &poolname
))
3919 if (nvlist_lookup_uint64(tryconfig
, ZPOOL_CONFIG_POOL_STATE
, &state
))
3923 * Create and initialize the spa structure.
3925 mutex_enter(&spa_namespace_lock
);
3926 spa
= spa_add(TRYIMPORT_NAME
, tryconfig
, NULL
);
3927 spa_activate(spa
, FREAD
);
3930 * Pass off the heavy lifting to spa_load().
3931 * Pass TRUE for mosconfig because the user-supplied config
3932 * is actually the one to trust when doing an import.
3934 error
= spa_load(spa
, SPA_LOAD_TRYIMPORT
, SPA_IMPORT_EXISTING
, B_TRUE
);
3937 * If 'tryconfig' was at least parsable, return the current config.
3939 if (spa
->spa_root_vdev
!= NULL
) {
3940 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
3941 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3943 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
3945 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_TIMESTAMP
,
3946 spa
->spa_uberblock
.ub_timestamp
) == 0);
3947 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
3948 spa
->spa_load_info
) == 0);
3951 * If the bootfs property exists on this pool then we
3952 * copy it out so that external consumers can tell which
3953 * pools are bootable.
3955 if ((!error
|| error
== EEXIST
) && spa
->spa_bootfs
) {
3956 char *tmpname
= kmem_alloc(MAXPATHLEN
, KM_PUSHPAGE
);
3959 * We have to play games with the name since the
3960 * pool was opened as TRYIMPORT_NAME.
3962 if (dsl_dsobj_to_dsname(spa_name(spa
),
3963 spa
->spa_bootfs
, tmpname
) == 0) {
3965 char *dsname
= kmem_alloc(MAXPATHLEN
, KM_PUSHPAGE
);
3967 cp
= strchr(tmpname
, '/');
3969 (void) strlcpy(dsname
, tmpname
,
3972 (void) snprintf(dsname
, MAXPATHLEN
,
3973 "%s/%s", poolname
, ++cp
);
3975 VERIFY(nvlist_add_string(config
,
3976 ZPOOL_CONFIG_BOOTFS
, dsname
) == 0);
3977 kmem_free(dsname
, MAXPATHLEN
);
3979 kmem_free(tmpname
, MAXPATHLEN
);
3983 * Add the list of hot spares and level 2 cache devices.
3985 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3986 spa_add_spares(spa
, config
);
3987 spa_add_l2cache(spa
, config
);
3988 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3992 spa_deactivate(spa
);
3994 mutex_exit(&spa_namespace_lock
);
4000 * Pool export/destroy
4002 * The act of destroying or exporting a pool is very simple. We make sure there
4003 * is no more pending I/O and any references to the pool are gone. Then, we
4004 * update the pool state and sync all the labels to disk, removing the
4005 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
4006 * we don't sync the labels or remove the configuration cache.
4009 spa_export_common(char *pool
, int new_state
, nvlist_t
**oldconfig
,
4010 boolean_t force
, boolean_t hardforce
)
4017 if (!(spa_mode_global
& FWRITE
))
4020 mutex_enter(&spa_namespace_lock
);
4021 if ((spa
= spa_lookup(pool
)) == NULL
) {
4022 mutex_exit(&spa_namespace_lock
);
4027 * Put a hold on the pool, drop the namespace lock, stop async tasks,
4028 * reacquire the namespace lock, and see if we can export.
4030 spa_open_ref(spa
, FTAG
);
4031 mutex_exit(&spa_namespace_lock
);
4032 spa_async_suspend(spa
);
4033 mutex_enter(&spa_namespace_lock
);
4034 spa_close(spa
, FTAG
);
4037 * The pool will be in core if it's openable,
4038 * in which case we can modify its state.
4040 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
&& spa
->spa_sync_on
) {
4042 * Objsets may be open only because they're dirty, so we
4043 * have to force it to sync before checking spa_refcnt.
4045 txg_wait_synced(spa
->spa_dsl_pool
, 0);
4048 * A pool cannot be exported or destroyed if there are active
4049 * references. If we are resetting a pool, allow references by
4050 * fault injection handlers.
4052 if (!spa_refcount_zero(spa
) ||
4053 (spa
->spa_inject_ref
!= 0 &&
4054 new_state
!= POOL_STATE_UNINITIALIZED
)) {
4055 spa_async_resume(spa
);
4056 mutex_exit(&spa_namespace_lock
);
4061 * A pool cannot be exported if it has an active shared spare.
4062 * This is to prevent other pools stealing the active spare
4063 * from an exported pool. At user's own will, such pool can
4064 * be forcedly exported.
4066 if (!force
&& new_state
== POOL_STATE_EXPORTED
&&
4067 spa_has_active_shared_spare(spa
)) {
4068 spa_async_resume(spa
);
4069 mutex_exit(&spa_namespace_lock
);
4074 * We want this to be reflected on every label,
4075 * so mark them all dirty. spa_unload() will do the
4076 * final sync that pushes these changes out.
4078 if (new_state
!= POOL_STATE_UNINITIALIZED
&& !hardforce
) {
4079 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4080 spa
->spa_state
= new_state
;
4081 spa
->spa_final_txg
= spa_last_synced_txg(spa
) +
4083 vdev_config_dirty(spa
->spa_root_vdev
);
4084 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4088 spa_event_notify(spa
, NULL
, FM_EREPORT_ZFS_POOL_DESTROY
);
4090 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
4092 spa_deactivate(spa
);
4095 if (oldconfig
&& spa
->spa_config
)
4096 VERIFY(nvlist_dup(spa
->spa_config
, oldconfig
, 0) == 0);
4098 if (new_state
!= POOL_STATE_UNINITIALIZED
) {
4100 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
4103 mutex_exit(&spa_namespace_lock
);
4109 * Destroy a storage pool.
4112 spa_destroy(char *pool
)
4114 return (spa_export_common(pool
, POOL_STATE_DESTROYED
, NULL
,
4119 * Export a storage pool.
4122 spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
4123 boolean_t hardforce
)
4125 return (spa_export_common(pool
, POOL_STATE_EXPORTED
, oldconfig
,
4130 * Similar to spa_export(), this unloads the spa_t without actually removing it
4131 * from the namespace in any way.
4134 spa_reset(char *pool
)
4136 return (spa_export_common(pool
, POOL_STATE_UNINITIALIZED
, NULL
,
4141 * ==========================================================================
4142 * Device manipulation
4143 * ==========================================================================
4147 * Add a device to a storage pool.
4150 spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
)
4154 vdev_t
*rvd
= spa
->spa_root_vdev
;
4156 nvlist_t
**spares
, **l2cache
;
4157 uint_t nspares
, nl2cache
;
4160 ASSERT(spa_writeable(spa
));
4162 txg
= spa_vdev_enter(spa
);
4164 if ((error
= spa_config_parse(spa
, &vd
, nvroot
, NULL
, 0,
4165 VDEV_ALLOC_ADD
)) != 0)
4166 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4168 spa
->spa_pending_vdev
= vd
; /* spa_vdev_exit() will clear this */
4170 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
, &spares
,
4174 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
, &l2cache
,
4178 if (vd
->vdev_children
== 0 && nspares
== 0 && nl2cache
== 0)
4179 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
4181 if (vd
->vdev_children
!= 0 &&
4182 (error
= vdev_create(vd
, txg
, B_FALSE
)) != 0)
4183 return (spa_vdev_exit(spa
, vd
, txg
, error
));
4186 * We must validate the spares and l2cache devices after checking the
4187 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
4189 if ((error
= spa_validate_aux(spa
, nvroot
, txg
, VDEV_ALLOC_ADD
)) != 0)
4190 return (spa_vdev_exit(spa
, vd
, txg
, error
));
4193 * Transfer each new top-level vdev from vd to rvd.
4195 for (c
= 0; c
< vd
->vdev_children
; c
++) {
4198 * Set the vdev id to the first hole, if one exists.
4200 for (id
= 0; id
< rvd
->vdev_children
; id
++) {
4201 if (rvd
->vdev_child
[id
]->vdev_ishole
) {
4202 vdev_free(rvd
->vdev_child
[id
]);
4206 tvd
= vd
->vdev_child
[c
];
4207 vdev_remove_child(vd
, tvd
);
4209 vdev_add_child(rvd
, tvd
);
4210 vdev_config_dirty(tvd
);
4214 spa_set_aux_vdevs(&spa
->spa_spares
, spares
, nspares
,
4215 ZPOOL_CONFIG_SPARES
);
4216 spa_load_spares(spa
);
4217 spa
->spa_spares
.sav_sync
= B_TRUE
;
4220 if (nl2cache
!= 0) {
4221 spa_set_aux_vdevs(&spa
->spa_l2cache
, l2cache
, nl2cache
,
4222 ZPOOL_CONFIG_L2CACHE
);
4223 spa_load_l2cache(spa
);
4224 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4228 * We have to be careful when adding new vdevs to an existing pool.
4229 * If other threads start allocating from these vdevs before we
4230 * sync the config cache, and we lose power, then upon reboot we may
4231 * fail to open the pool because there are DVAs that the config cache
4232 * can't translate. Therefore, we first add the vdevs without
4233 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
4234 * and then let spa_config_update() initialize the new metaslabs.
4236 * spa_load() checks for added-but-not-initialized vdevs, so that
4237 * if we lose power at any point in this sequence, the remaining
4238 * steps will be completed the next time we load the pool.
4240 (void) spa_vdev_exit(spa
, vd
, txg
, 0);
4242 mutex_enter(&spa_namespace_lock
);
4243 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
4244 mutex_exit(&spa_namespace_lock
);
4250 * Attach a device to a mirror. The arguments are the path to any device
4251 * in the mirror, and the nvroot for the new device. If the path specifies
4252 * a device that is not mirrored, we automatically insert the mirror vdev.
4254 * If 'replacing' is specified, the new device is intended to replace the
4255 * existing device; in this case the two devices are made into their own
4256 * mirror using the 'replacing' vdev, which is functionally identical to
4257 * the mirror vdev (it actually reuses all the same ops) but has a few
4258 * extra rules: you can't attach to it after it's been created, and upon
4259 * completion of resilvering, the first disk (the one being replaced)
4260 * is automatically detached.
4263 spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
, int replacing
)
4265 uint64_t txg
, dtl_max_txg
;
4266 ASSERTV(vdev_t
*rvd
= spa
->spa_root_vdev
;)
4267 vdev_t
*oldvd
, *newvd
, *newrootvd
, *pvd
, *tvd
;
4269 char *oldvdpath
, *newvdpath
;
4273 ASSERT(spa_writeable(spa
));
4275 txg
= spa_vdev_enter(spa
);
4277 oldvd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4280 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4282 if (!oldvd
->vdev_ops
->vdev_op_leaf
)
4283 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4285 pvd
= oldvd
->vdev_parent
;
4287 if ((error
= spa_config_parse(spa
, &newrootvd
, nvroot
, NULL
, 0,
4288 VDEV_ALLOC_ATTACH
)) != 0)
4289 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4291 if (newrootvd
->vdev_children
!= 1)
4292 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
4294 newvd
= newrootvd
->vdev_child
[0];
4296 if (!newvd
->vdev_ops
->vdev_op_leaf
)
4297 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
4299 if ((error
= vdev_create(newrootvd
, txg
, replacing
)) != 0)
4300 return (spa_vdev_exit(spa
, newrootvd
, txg
, error
));
4303 * Spares can't replace logs
4305 if (oldvd
->vdev_top
->vdev_islog
&& newvd
->vdev_isspare
)
4306 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4310 * For attach, the only allowable parent is a mirror or the root
4313 if (pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4314 pvd
->vdev_ops
!= &vdev_root_ops
)
4315 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4317 pvops
= &vdev_mirror_ops
;
4320 * Active hot spares can only be replaced by inactive hot
4323 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4324 oldvd
->vdev_isspare
&&
4325 !spa_has_spare(spa
, newvd
->vdev_guid
))
4326 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4329 * If the source is a hot spare, and the parent isn't already a
4330 * spare, then we want to create a new hot spare. Otherwise, we
4331 * want to create a replacing vdev. The user is not allowed to
4332 * attach to a spared vdev child unless the 'isspare' state is
4333 * the same (spare replaces spare, non-spare replaces
4336 if (pvd
->vdev_ops
== &vdev_replacing_ops
&&
4337 spa_version(spa
) < SPA_VERSION_MULTI_REPLACE
) {
4338 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4339 } else if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4340 newvd
->vdev_isspare
!= oldvd
->vdev_isspare
) {
4341 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4344 if (newvd
->vdev_isspare
)
4345 pvops
= &vdev_spare_ops
;
4347 pvops
= &vdev_replacing_ops
;
4351 * Make sure the new device is big enough.
4353 if (newvd
->vdev_asize
< vdev_get_min_asize(oldvd
))
4354 return (spa_vdev_exit(spa
, newrootvd
, txg
, EOVERFLOW
));
4357 * The new device cannot have a higher alignment requirement
4358 * than the top-level vdev.
4360 if (newvd
->vdev_ashift
> oldvd
->vdev_top
->vdev_ashift
)
4361 return (spa_vdev_exit(spa
, newrootvd
, txg
, EDOM
));
4364 * If this is an in-place replacement, update oldvd's path and devid
4365 * to make it distinguishable from newvd, and unopenable from now on.
4367 if (strcmp(oldvd
->vdev_path
, newvd
->vdev_path
) == 0) {
4368 spa_strfree(oldvd
->vdev_path
);
4369 oldvd
->vdev_path
= kmem_alloc(strlen(newvd
->vdev_path
) + 5,
4371 (void) sprintf(oldvd
->vdev_path
, "%s/%s",
4372 newvd
->vdev_path
, "old");
4373 if (oldvd
->vdev_devid
!= NULL
) {
4374 spa_strfree(oldvd
->vdev_devid
);
4375 oldvd
->vdev_devid
= NULL
;
4379 /* mark the device being resilvered */
4380 newvd
->vdev_resilvering
= B_TRUE
;
4383 * If the parent is not a mirror, or if we're replacing, insert the new
4384 * mirror/replacing/spare vdev above oldvd.
4386 if (pvd
->vdev_ops
!= pvops
)
4387 pvd
= vdev_add_parent(oldvd
, pvops
);
4389 ASSERT(pvd
->vdev_top
->vdev_parent
== rvd
);
4390 ASSERT(pvd
->vdev_ops
== pvops
);
4391 ASSERT(oldvd
->vdev_parent
== pvd
);
4394 * Extract the new device from its root and add it to pvd.
4396 vdev_remove_child(newrootvd
, newvd
);
4397 newvd
->vdev_id
= pvd
->vdev_children
;
4398 newvd
->vdev_crtxg
= oldvd
->vdev_crtxg
;
4399 vdev_add_child(pvd
, newvd
);
4401 tvd
= newvd
->vdev_top
;
4402 ASSERT(pvd
->vdev_top
== tvd
);
4403 ASSERT(tvd
->vdev_parent
== rvd
);
4405 vdev_config_dirty(tvd
);
4408 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
4409 * for any dmu_sync-ed blocks. It will propagate upward when
4410 * spa_vdev_exit() calls vdev_dtl_reassess().
4412 dtl_max_txg
= txg
+ TXG_CONCURRENT_STATES
;
4414 vdev_dtl_dirty(newvd
, DTL_MISSING
, TXG_INITIAL
,
4415 dtl_max_txg
- TXG_INITIAL
);
4417 if (newvd
->vdev_isspare
) {
4418 spa_spare_activate(newvd
);
4419 spa_event_notify(spa
, newvd
, FM_EREPORT_ZFS_DEVICE_SPARE
);
4422 oldvdpath
= spa_strdup(oldvd
->vdev_path
);
4423 newvdpath
= spa_strdup(newvd
->vdev_path
);
4424 newvd_isspare
= newvd
->vdev_isspare
;
4427 * Mark newvd's DTL dirty in this txg.
4429 vdev_dirty(tvd
, VDD_DTL
, newvd
, txg
);
4432 * Restart the resilver
4434 dsl_resilver_restart(spa
->spa_dsl_pool
, dtl_max_txg
);
4439 (void) spa_vdev_exit(spa
, newrootvd
, dtl_max_txg
, 0);
4441 spa_history_log_internal(LOG_POOL_VDEV_ATTACH
, spa
, NULL
,
4442 "%s vdev=%s %s vdev=%s",
4443 replacing
&& newvd_isspare
? "spare in" :
4444 replacing
? "replace" : "attach", newvdpath
,
4445 replacing
? "for" : "to", oldvdpath
);
4447 spa_strfree(oldvdpath
);
4448 spa_strfree(newvdpath
);
4450 if (spa
->spa_bootfs
)
4451 spa_event_notify(spa
, newvd
, FM_EREPORT_ZFS_BOOTFS_VDEV_ATTACH
);
4457 * Detach a device from a mirror or replacing vdev.
4458 * If 'replace_done' is specified, only detach if the parent
4459 * is a replacing vdev.
4462 spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
, int replace_done
)
4466 ASSERTV(vdev_t
*rvd
= spa
->spa_root_vdev
;)
4467 vdev_t
*vd
, *pvd
, *cvd
, *tvd
;
4468 boolean_t unspare
= B_FALSE
;
4469 uint64_t unspare_guid
= 0;
4473 ASSERT(spa_writeable(spa
));
4475 txg
= spa_vdev_enter(spa
);
4477 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4480 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4482 if (!vd
->vdev_ops
->vdev_op_leaf
)
4483 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4485 pvd
= vd
->vdev_parent
;
4488 * If the parent/child relationship is not as expected, don't do it.
4489 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4490 * vdev that's replacing B with C. The user's intent in replacing
4491 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4492 * the replace by detaching C, the expected behavior is to end up
4493 * M(A,B). But suppose that right after deciding to detach C,
4494 * the replacement of B completes. We would have M(A,C), and then
4495 * ask to detach C, which would leave us with just A -- not what
4496 * the user wanted. To prevent this, we make sure that the
4497 * parent/child relationship hasn't changed -- in this example,
4498 * that C's parent is still the replacing vdev R.
4500 if (pvd
->vdev_guid
!= pguid
&& pguid
!= 0)
4501 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4504 * Only 'replacing' or 'spare' vdevs can be replaced.
4506 if (replace_done
&& pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4507 pvd
->vdev_ops
!= &vdev_spare_ops
)
4508 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4510 ASSERT(pvd
->vdev_ops
!= &vdev_spare_ops
||
4511 spa_version(spa
) >= SPA_VERSION_SPARES
);
4514 * Only mirror, replacing, and spare vdevs support detach.
4516 if (pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4517 pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4518 pvd
->vdev_ops
!= &vdev_spare_ops
)
4519 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4522 * If this device has the only valid copy of some data,
4523 * we cannot safely detach it.
4525 if (vdev_dtl_required(vd
))
4526 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4528 ASSERT(pvd
->vdev_children
>= 2);
4531 * If we are detaching the second disk from a replacing vdev, then
4532 * check to see if we changed the original vdev's path to have "/old"
4533 * at the end in spa_vdev_attach(). If so, undo that change now.
4535 if (pvd
->vdev_ops
== &vdev_replacing_ops
&& vd
->vdev_id
> 0 &&
4536 vd
->vdev_path
!= NULL
) {
4537 size_t len
= strlen(vd
->vdev_path
);
4539 for (c
= 0; c
< pvd
->vdev_children
; c
++) {
4540 cvd
= pvd
->vdev_child
[c
];
4542 if (cvd
== vd
|| cvd
->vdev_path
== NULL
)
4545 if (strncmp(cvd
->vdev_path
, vd
->vdev_path
, len
) == 0 &&
4546 strcmp(cvd
->vdev_path
+ len
, "/old") == 0) {
4547 spa_strfree(cvd
->vdev_path
);
4548 cvd
->vdev_path
= spa_strdup(vd
->vdev_path
);
4555 * If we are detaching the original disk from a spare, then it implies
4556 * that the spare should become a real disk, and be removed from the
4557 * active spare list for the pool.
4559 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4561 pvd
->vdev_child
[pvd
->vdev_children
- 1]->vdev_isspare
)
4565 * Erase the disk labels so the disk can be used for other things.
4566 * This must be done after all other error cases are handled,
4567 * but before we disembowel vd (so we can still do I/O to it).
4568 * But if we can't do it, don't treat the error as fatal --
4569 * it may be that the unwritability of the disk is the reason
4570 * it's being detached!
4572 error
= vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4575 * Remove vd from its parent and compact the parent's children.
4577 vdev_remove_child(pvd
, vd
);
4578 vdev_compact_children(pvd
);
4581 * Remember one of the remaining children so we can get tvd below.
4583 cvd
= pvd
->vdev_child
[pvd
->vdev_children
- 1];
4586 * If we need to remove the remaining child from the list of hot spares,
4587 * do it now, marking the vdev as no longer a spare in the process.
4588 * We must do this before vdev_remove_parent(), because that can
4589 * change the GUID if it creates a new toplevel GUID. For a similar
4590 * reason, we must remove the spare now, in the same txg as the detach;
4591 * otherwise someone could attach a new sibling, change the GUID, and
4592 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
4595 ASSERT(cvd
->vdev_isspare
);
4596 spa_spare_remove(cvd
);
4597 unspare_guid
= cvd
->vdev_guid
;
4598 (void) spa_vdev_remove(spa
, unspare_guid
, B_TRUE
);
4599 cvd
->vdev_unspare
= B_TRUE
;
4603 * If the parent mirror/replacing vdev only has one child,
4604 * the parent is no longer needed. Remove it from the tree.
4606 if (pvd
->vdev_children
== 1) {
4607 if (pvd
->vdev_ops
== &vdev_spare_ops
)
4608 cvd
->vdev_unspare
= B_FALSE
;
4609 vdev_remove_parent(cvd
);
4610 cvd
->vdev_resilvering
= B_FALSE
;
4615 * We don't set tvd until now because the parent we just removed
4616 * may have been the previous top-level vdev.
4618 tvd
= cvd
->vdev_top
;
4619 ASSERT(tvd
->vdev_parent
== rvd
);
4622 * Reevaluate the parent vdev state.
4624 vdev_propagate_state(cvd
);
4627 * If the 'autoexpand' property is set on the pool then automatically
4628 * try to expand the size of the pool. For example if the device we
4629 * just detached was smaller than the others, it may be possible to
4630 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
4631 * first so that we can obtain the updated sizes of the leaf vdevs.
4633 if (spa
->spa_autoexpand
) {
4635 vdev_expand(tvd
, txg
);
4638 vdev_config_dirty(tvd
);
4641 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
4642 * vd->vdev_detached is set and free vd's DTL object in syncing context.
4643 * But first make sure we're not on any *other* txg's DTL list, to
4644 * prevent vd from being accessed after it's freed.
4646 vdpath
= spa_strdup(vd
->vdev_path
);
4647 for (t
= 0; t
< TXG_SIZE
; t
++)
4648 (void) txg_list_remove_this(&tvd
->vdev_dtl_list
, vd
, t
);
4649 vd
->vdev_detached
= B_TRUE
;
4650 vdev_dirty(tvd
, VDD_DTL
, vd
, txg
);
4652 spa_event_notify(spa
, vd
, FM_EREPORT_ZFS_DEVICE_REMOVE
);
4654 /* hang on to the spa before we release the lock */
4655 spa_open_ref(spa
, FTAG
);
4657 error
= spa_vdev_exit(spa
, vd
, txg
, 0);
4659 spa_history_log_internal(LOG_POOL_VDEV_DETACH
, spa
, NULL
,
4661 spa_strfree(vdpath
);
4664 * If this was the removal of the original device in a hot spare vdev,
4665 * then we want to go through and remove the device from the hot spare
4666 * list of every other pool.
4669 spa_t
*altspa
= NULL
;
4671 mutex_enter(&spa_namespace_lock
);
4672 while ((altspa
= spa_next(altspa
)) != NULL
) {
4673 if (altspa
->spa_state
!= POOL_STATE_ACTIVE
||
4677 spa_open_ref(altspa
, FTAG
);
4678 mutex_exit(&spa_namespace_lock
);
4679 (void) spa_vdev_remove(altspa
, unspare_guid
, B_TRUE
);
4680 mutex_enter(&spa_namespace_lock
);
4681 spa_close(altspa
, FTAG
);
4683 mutex_exit(&spa_namespace_lock
);
4685 /* search the rest of the vdevs for spares to remove */
4686 spa_vdev_resilver_done(spa
);
4689 /* all done with the spa; OK to release */
4690 mutex_enter(&spa_namespace_lock
);
4691 spa_close(spa
, FTAG
);
4692 mutex_exit(&spa_namespace_lock
);
4698 * Split a set of devices from their mirrors, and create a new pool from them.
4701 spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
4702 nvlist_t
*props
, boolean_t exp
)
4705 uint64_t txg
, *glist
;
4707 uint_t c
, children
, lastlog
;
4708 nvlist_t
**child
, *nvl
, *tmp
;
4710 char *altroot
= NULL
;
4711 vdev_t
*rvd
, **vml
= NULL
; /* vdev modify list */
4712 boolean_t activate_slog
;
4714 ASSERT(spa_writeable(spa
));
4716 txg
= spa_vdev_enter(spa
);
4718 /* clear the log and flush everything up to now */
4719 activate_slog
= spa_passivate_log(spa
);
4720 (void) spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4721 error
= spa_offline_log(spa
);
4722 txg
= spa_vdev_config_enter(spa
);
4725 spa_activate_log(spa
);
4728 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4730 /* check new spa name before going any further */
4731 if (spa_lookup(newname
) != NULL
)
4732 return (spa_vdev_exit(spa
, NULL
, txg
, EEXIST
));
4735 * scan through all the children to ensure they're all mirrors
4737 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
) != 0 ||
4738 nvlist_lookup_nvlist_array(nvl
, ZPOOL_CONFIG_CHILDREN
, &child
,
4740 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4742 /* first, check to ensure we've got the right child count */
4743 rvd
= spa
->spa_root_vdev
;
4745 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
4746 vdev_t
*vd
= rvd
->vdev_child
[c
];
4748 /* don't count the holes & logs as children */
4749 if (vd
->vdev_islog
|| vd
->vdev_ishole
) {
4757 if (children
!= (lastlog
!= 0 ? lastlog
: rvd
->vdev_children
))
4758 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4760 /* next, ensure no spare or cache devices are part of the split */
4761 if (nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_SPARES
, &tmp
) == 0 ||
4762 nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_L2CACHE
, &tmp
) == 0)
4763 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4765 vml
= kmem_zalloc(children
* sizeof (vdev_t
*), KM_PUSHPAGE
);
4766 glist
= kmem_zalloc(children
* sizeof (uint64_t), KM_PUSHPAGE
);
4768 /* then, loop over each vdev and validate it */
4769 for (c
= 0; c
< children
; c
++) {
4770 uint64_t is_hole
= 0;
4772 (void) nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_IS_HOLE
,
4776 if (spa
->spa_root_vdev
->vdev_child
[c
]->vdev_ishole
||
4777 spa
->spa_root_vdev
->vdev_child
[c
]->vdev_islog
) {
4785 /* which disk is going to be split? */
4786 if (nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_GUID
,
4792 /* look it up in the spa */
4793 vml
[c
] = spa_lookup_by_guid(spa
, glist
[c
], B_FALSE
);
4794 if (vml
[c
] == NULL
) {
4799 /* make sure there's nothing stopping the split */
4800 if (vml
[c
]->vdev_parent
->vdev_ops
!= &vdev_mirror_ops
||
4801 vml
[c
]->vdev_islog
||
4802 vml
[c
]->vdev_ishole
||
4803 vml
[c
]->vdev_isspare
||
4804 vml
[c
]->vdev_isl2cache
||
4805 !vdev_writeable(vml
[c
]) ||
4806 vml
[c
]->vdev_children
!= 0 ||
4807 vml
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
||
4808 c
!= spa
->spa_root_vdev
->vdev_child
[c
]->vdev_id
) {
4813 if (vdev_dtl_required(vml
[c
])) {
4818 /* we need certain info from the top level */
4819 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_ARRAY
,
4820 vml
[c
]->vdev_top
->vdev_ms_array
) == 0);
4821 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_SHIFT
,
4822 vml
[c
]->vdev_top
->vdev_ms_shift
) == 0);
4823 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASIZE
,
4824 vml
[c
]->vdev_top
->vdev_asize
) == 0);
4825 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASHIFT
,
4826 vml
[c
]->vdev_top
->vdev_ashift
) == 0);
4830 kmem_free(vml
, children
* sizeof (vdev_t
*));
4831 kmem_free(glist
, children
* sizeof (uint64_t));
4832 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4835 /* stop writers from using the disks */
4836 for (c
= 0; c
< children
; c
++) {
4838 vml
[c
]->vdev_offline
= B_TRUE
;
4840 vdev_reopen(spa
->spa_root_vdev
);
4843 * Temporarily record the splitting vdevs in the spa config. This
4844 * will disappear once the config is regenerated.
4846 VERIFY(nvlist_alloc(&nvl
, NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
4847 VERIFY(nvlist_add_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
4848 glist
, children
) == 0);
4849 kmem_free(glist
, children
* sizeof (uint64_t));
4851 mutex_enter(&spa
->spa_props_lock
);
4852 VERIFY(nvlist_add_nvlist(spa
->spa_config
, ZPOOL_CONFIG_SPLIT
,
4854 mutex_exit(&spa
->spa_props_lock
);
4855 spa
->spa_config_splitting
= nvl
;
4856 vdev_config_dirty(spa
->spa_root_vdev
);
4858 /* configure and create the new pool */
4859 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
, newname
) == 0);
4860 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
4861 exp
? POOL_STATE_EXPORTED
: POOL_STATE_ACTIVE
) == 0);
4862 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
4863 spa_version(spa
)) == 0);
4864 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
4865 spa
->spa_config_txg
) == 0);
4866 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
4867 spa_generate_guid(NULL
)) == 0);
4868 (void) nvlist_lookup_string(props
,
4869 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
4871 /* add the new pool to the namespace */
4872 newspa
= spa_add(newname
, config
, altroot
);
4873 newspa
->spa_config_txg
= spa
->spa_config_txg
;
4874 spa_set_log_state(newspa
, SPA_LOG_CLEAR
);
4876 /* release the spa config lock, retaining the namespace lock */
4877 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4879 if (zio_injection_enabled
)
4880 zio_handle_panic_injection(spa
, FTAG
, 1);
4882 spa_activate(newspa
, spa_mode_global
);
4883 spa_async_suspend(newspa
);
4885 /* create the new pool from the disks of the original pool */
4886 error
= spa_load(newspa
, SPA_LOAD_IMPORT
, SPA_IMPORT_ASSEMBLE
, B_TRUE
);
4890 /* if that worked, generate a real config for the new pool */
4891 if (newspa
->spa_root_vdev
!= NULL
) {
4892 VERIFY(nvlist_alloc(&newspa
->spa_config_splitting
,
4893 NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
4894 VERIFY(nvlist_add_uint64(newspa
->spa_config_splitting
,
4895 ZPOOL_CONFIG_SPLIT_GUID
, spa_guid(spa
)) == 0);
4896 spa_config_set(newspa
, spa_config_generate(newspa
, NULL
, -1ULL,
4901 if (props
!= NULL
) {
4902 spa_configfile_set(newspa
, props
, B_FALSE
);
4903 error
= spa_prop_set(newspa
, props
);
4908 /* flush everything */
4909 txg
= spa_vdev_config_enter(newspa
);
4910 vdev_config_dirty(newspa
->spa_root_vdev
);
4911 (void) spa_vdev_config_exit(newspa
, NULL
, txg
, 0, FTAG
);
4913 if (zio_injection_enabled
)
4914 zio_handle_panic_injection(spa
, FTAG
, 2);
4916 spa_async_resume(newspa
);
4918 /* finally, update the original pool's config */
4919 txg
= spa_vdev_config_enter(spa
);
4920 tx
= dmu_tx_create_dd(spa_get_dsl(spa
)->dp_mos_dir
);
4921 error
= dmu_tx_assign(tx
, TXG_WAIT
);
4924 for (c
= 0; c
< children
; c
++) {
4925 if (vml
[c
] != NULL
) {
4928 spa_history_log_internal(LOG_POOL_VDEV_DETACH
,
4934 vdev_config_dirty(spa
->spa_root_vdev
);
4935 spa
->spa_config_splitting
= NULL
;
4939 (void) spa_vdev_exit(spa
, NULL
, txg
, 0);
4941 if (zio_injection_enabled
)
4942 zio_handle_panic_injection(spa
, FTAG
, 3);
4944 /* split is complete; log a history record */
4945 spa_history_log_internal(LOG_POOL_SPLIT
, newspa
, NULL
,
4946 "split new pool %s from pool %s", newname
, spa_name(spa
));
4948 kmem_free(vml
, children
* sizeof (vdev_t
*));
4950 /* if we're not going to mount the filesystems in userland, export */
4952 error
= spa_export_common(newname
, POOL_STATE_EXPORTED
, NULL
,
4959 spa_deactivate(newspa
);
4962 txg
= spa_vdev_config_enter(spa
);
4964 /* re-online all offlined disks */
4965 for (c
= 0; c
< children
; c
++) {
4967 vml
[c
]->vdev_offline
= B_FALSE
;
4969 vdev_reopen(spa
->spa_root_vdev
);
4971 nvlist_free(spa
->spa_config_splitting
);
4972 spa
->spa_config_splitting
= NULL
;
4973 (void) spa_vdev_exit(spa
, NULL
, txg
, error
);
4975 kmem_free(vml
, children
* sizeof (vdev_t
*));
4980 spa_nvlist_lookup_by_guid(nvlist_t
**nvpp
, int count
, uint64_t target_guid
)
4984 for (i
= 0; i
< count
; i
++) {
4987 VERIFY(nvlist_lookup_uint64(nvpp
[i
], ZPOOL_CONFIG_GUID
,
4990 if (guid
== target_guid
)
4998 spa_vdev_remove_aux(nvlist_t
*config
, char *name
, nvlist_t
**dev
, int count
,
4999 nvlist_t
*dev_to_remove
)
5001 nvlist_t
**newdev
= NULL
;
5005 newdev
= kmem_alloc((count
- 1) * sizeof (void *), KM_PUSHPAGE
);
5007 for (i
= 0, j
= 0; i
< count
; i
++) {
5008 if (dev
[i
] == dev_to_remove
)
5010 VERIFY(nvlist_dup(dev
[i
], &newdev
[j
++], KM_PUSHPAGE
) == 0);
5013 VERIFY(nvlist_remove(config
, name
, DATA_TYPE_NVLIST_ARRAY
) == 0);
5014 VERIFY(nvlist_add_nvlist_array(config
, name
, newdev
, count
- 1) == 0);
5016 for (i
= 0; i
< count
- 1; i
++)
5017 nvlist_free(newdev
[i
]);
5020 kmem_free(newdev
, (count
- 1) * sizeof (void *));
5024 * Evacuate the device.
5027 spa_vdev_remove_evacuate(spa_t
*spa
, vdev_t
*vd
)
5032 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
5033 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5034 ASSERT(vd
== vd
->vdev_top
);
5037 * Evacuate the device. We don't hold the config lock as writer
5038 * since we need to do I/O but we do keep the
5039 * spa_namespace_lock held. Once this completes the device
5040 * should no longer have any blocks allocated on it.
5042 if (vd
->vdev_islog
) {
5043 if (vd
->vdev_stat
.vs_alloc
!= 0)
5044 error
= spa_offline_log(spa
);
5053 * The evacuation succeeded. Remove any remaining MOS metadata
5054 * associated with this vdev, and wait for these changes to sync.
5056 ASSERT3U(vd
->vdev_stat
.vs_alloc
, ==, 0);
5057 txg
= spa_vdev_config_enter(spa
);
5058 vd
->vdev_removing
= B_TRUE
;
5059 vdev_dirty(vd
, 0, NULL
, txg
);
5060 vdev_config_dirty(vd
);
5061 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
5067 * Complete the removal by cleaning up the namespace.
5070 spa_vdev_remove_from_namespace(spa_t
*spa
, vdev_t
*vd
)
5072 vdev_t
*rvd
= spa
->spa_root_vdev
;
5073 uint64_t id
= vd
->vdev_id
;
5074 boolean_t last_vdev
= (id
== (rvd
->vdev_children
- 1));
5076 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
5077 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
5078 ASSERT(vd
== vd
->vdev_top
);
5081 * Only remove any devices which are empty.
5083 if (vd
->vdev_stat
.vs_alloc
!= 0)
5086 (void) vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
5088 if (list_link_active(&vd
->vdev_state_dirty_node
))
5089 vdev_state_clean(vd
);
5090 if (list_link_active(&vd
->vdev_config_dirty_node
))
5091 vdev_config_clean(vd
);
5096 vdev_compact_children(rvd
);
5098 vd
= vdev_alloc_common(spa
, id
, 0, &vdev_hole_ops
);
5099 vdev_add_child(rvd
, vd
);
5101 vdev_config_dirty(rvd
);
5104 * Reassess the health of our root vdev.
5110 * Remove a device from the pool -
5112 * Removing a device from the vdev namespace requires several steps
5113 * and can take a significant amount of time. As a result we use
5114 * the spa_vdev_config_[enter/exit] functions which allow us to
5115 * grab and release the spa_config_lock while still holding the namespace
5116 * lock. During each step the configuration is synced out.
5120 * Remove a device from the pool. Currently, this supports removing only hot
5121 * spares, slogs, and level 2 ARC devices.
5124 spa_vdev_remove(spa_t
*spa
, uint64_t guid
, boolean_t unspare
)
5127 metaslab_group_t
*mg
;
5128 nvlist_t
**spares
, **l2cache
, *nv
;
5130 uint_t nspares
, nl2cache
;
5132 boolean_t locked
= MUTEX_HELD(&spa_namespace_lock
);
5134 ASSERT(spa_writeable(spa
));
5137 txg
= spa_vdev_enter(spa
);
5139 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
5141 if (spa
->spa_spares
.sav_vdevs
!= NULL
&&
5142 nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
5143 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0 &&
5144 (nv
= spa_nvlist_lookup_by_guid(spares
, nspares
, guid
)) != NULL
) {
5146 * Only remove the hot spare if it's not currently in use
5149 if (vd
== NULL
|| unspare
) {
5150 spa_vdev_remove_aux(spa
->spa_spares
.sav_config
,
5151 ZPOOL_CONFIG_SPARES
, spares
, nspares
, nv
);
5152 spa_load_spares(spa
);
5153 spa
->spa_spares
.sav_sync
= B_TRUE
;
5157 } else if (spa
->spa_l2cache
.sav_vdevs
!= NULL
&&
5158 nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
5159 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0 &&
5160 (nv
= spa_nvlist_lookup_by_guid(l2cache
, nl2cache
, guid
)) != NULL
) {
5162 * Cache devices can always be removed.
5164 spa_vdev_remove_aux(spa
->spa_l2cache
.sav_config
,
5165 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
, nv
);
5166 spa_load_l2cache(spa
);
5167 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
5168 } else if (vd
!= NULL
&& vd
->vdev_islog
) {
5170 ASSERT(vd
== vd
->vdev_top
);
5173 * XXX - Once we have bp-rewrite this should
5174 * become the common case.
5180 * Stop allocating from this vdev.
5182 metaslab_group_passivate(mg
);
5185 * Wait for the youngest allocations and frees to sync,
5186 * and then wait for the deferral of those frees to finish.
5188 spa_vdev_config_exit(spa
, NULL
,
5189 txg
+ TXG_CONCURRENT_STATES
+ TXG_DEFER_SIZE
, 0, FTAG
);
5192 * Attempt to evacuate the vdev.
5194 error
= spa_vdev_remove_evacuate(spa
, vd
);
5196 txg
= spa_vdev_config_enter(spa
);
5199 * If we couldn't evacuate the vdev, unwind.
5202 metaslab_group_activate(mg
);
5203 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5207 * Clean up the vdev namespace.
5209 spa_vdev_remove_from_namespace(spa
, vd
);
5211 } else if (vd
!= NULL
) {
5213 * Normal vdevs cannot be removed (yet).
5218 * There is no vdev of any kind with the specified guid.
5224 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5230 * Find any device that's done replacing, or a vdev marked 'unspare' that's
5231 * current spared, so we can detach it.
5234 spa_vdev_resilver_done_hunt(vdev_t
*vd
)
5236 vdev_t
*newvd
, *oldvd
;
5239 for (c
= 0; c
< vd
->vdev_children
; c
++) {
5240 oldvd
= spa_vdev_resilver_done_hunt(vd
->vdev_child
[c
]);
5246 * Check for a completed replacement. We always consider the first
5247 * vdev in the list to be the oldest vdev, and the last one to be
5248 * the newest (see spa_vdev_attach() for how that works). In
5249 * the case where the newest vdev is faulted, we will not automatically
5250 * remove it after a resilver completes. This is OK as it will require
5251 * user intervention to determine which disk the admin wishes to keep.
5253 if (vd
->vdev_ops
== &vdev_replacing_ops
) {
5254 ASSERT(vd
->vdev_children
> 1);
5256 newvd
= vd
->vdev_child
[vd
->vdev_children
- 1];
5257 oldvd
= vd
->vdev_child
[0];
5259 if (vdev_dtl_empty(newvd
, DTL_MISSING
) &&
5260 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
5261 !vdev_dtl_required(oldvd
))
5266 * Check for a completed resilver with the 'unspare' flag set.
5268 if (vd
->vdev_ops
== &vdev_spare_ops
) {
5269 vdev_t
*first
= vd
->vdev_child
[0];
5270 vdev_t
*last
= vd
->vdev_child
[vd
->vdev_children
- 1];
5272 if (last
->vdev_unspare
) {
5275 } else if (first
->vdev_unspare
) {
5282 if (oldvd
!= NULL
&&
5283 vdev_dtl_empty(newvd
, DTL_MISSING
) &&
5284 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
5285 !vdev_dtl_required(oldvd
))
5289 * If there are more than two spares attached to a disk,
5290 * and those spares are not required, then we want to
5291 * attempt to free them up now so that they can be used
5292 * by other pools. Once we're back down to a single
5293 * disk+spare, we stop removing them.
5295 if (vd
->vdev_children
> 2) {
5296 newvd
= vd
->vdev_child
[1];
5298 if (newvd
->vdev_isspare
&& last
->vdev_isspare
&&
5299 vdev_dtl_empty(last
, DTL_MISSING
) &&
5300 vdev_dtl_empty(last
, DTL_OUTAGE
) &&
5301 !vdev_dtl_required(newvd
))
5310 spa_vdev_resilver_done(spa_t
*spa
)
5312 vdev_t
*vd
, *pvd
, *ppvd
;
5313 uint64_t guid
, sguid
, pguid
, ppguid
;
5315 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5317 while ((vd
= spa_vdev_resilver_done_hunt(spa
->spa_root_vdev
)) != NULL
) {
5318 pvd
= vd
->vdev_parent
;
5319 ppvd
= pvd
->vdev_parent
;
5320 guid
= vd
->vdev_guid
;
5321 pguid
= pvd
->vdev_guid
;
5322 ppguid
= ppvd
->vdev_guid
;
5325 * If we have just finished replacing a hot spared device, then
5326 * we need to detach the parent's first child (the original hot
5329 if (ppvd
->vdev_ops
== &vdev_spare_ops
&& pvd
->vdev_id
== 0 &&
5330 ppvd
->vdev_children
== 2) {
5331 ASSERT(pvd
->vdev_ops
== &vdev_replacing_ops
);
5332 sguid
= ppvd
->vdev_child
[1]->vdev_guid
;
5334 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5335 if (spa_vdev_detach(spa
, guid
, pguid
, B_TRUE
) != 0)
5337 if (sguid
&& spa_vdev_detach(spa
, sguid
, ppguid
, B_TRUE
) != 0)
5339 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5342 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5346 * Update the stored path or FRU for this vdev.
5349 spa_vdev_set_common(spa_t
*spa
, uint64_t guid
, const char *value
,
5353 boolean_t sync
= B_FALSE
;
5355 ASSERT(spa_writeable(spa
));
5357 spa_vdev_state_enter(spa
, SCL_ALL
);
5359 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
5360 return (spa_vdev_state_exit(spa
, NULL
, ENOENT
));
5362 if (!vd
->vdev_ops
->vdev_op_leaf
)
5363 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
5366 if (strcmp(value
, vd
->vdev_path
) != 0) {
5367 spa_strfree(vd
->vdev_path
);
5368 vd
->vdev_path
= spa_strdup(value
);
5372 if (vd
->vdev_fru
== NULL
) {
5373 vd
->vdev_fru
= spa_strdup(value
);
5375 } else if (strcmp(value
, vd
->vdev_fru
) != 0) {
5376 spa_strfree(vd
->vdev_fru
);
5377 vd
->vdev_fru
= spa_strdup(value
);
5382 return (spa_vdev_state_exit(spa
, sync
? vd
: NULL
, 0));
5386 spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
)
5388 return (spa_vdev_set_common(spa
, guid
, newpath
, B_TRUE
));
5392 spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
)
5394 return (spa_vdev_set_common(spa
, guid
, newfru
, B_FALSE
));
5398 * ==========================================================================
5400 * ==========================================================================
5404 spa_scan_stop(spa_t
*spa
)
5406 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5407 if (dsl_scan_resilvering(spa
->spa_dsl_pool
))
5409 return (dsl_scan_cancel(spa
->spa_dsl_pool
));
5413 spa_scan(spa_t
*spa
, pool_scan_func_t func
)
5415 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5417 if (func
>= POOL_SCAN_FUNCS
|| func
== POOL_SCAN_NONE
)
5421 * If a resilver was requested, but there is no DTL on a
5422 * writeable leaf device, we have nothing to do.
5424 if (func
== POOL_SCAN_RESILVER
&&
5425 !vdev_resilver_needed(spa
->spa_root_vdev
, NULL
, NULL
)) {
5426 spa_async_request(spa
, SPA_ASYNC_RESILVER_DONE
);
5430 return (dsl_scan(spa
->spa_dsl_pool
, func
));
5434 * ==========================================================================
5435 * SPA async task processing
5436 * ==========================================================================
5440 spa_async_remove(spa_t
*spa
, vdev_t
*vd
)
5444 if (vd
->vdev_remove_wanted
) {
5445 vd
->vdev_remove_wanted
= B_FALSE
;
5446 vd
->vdev_delayed_close
= B_FALSE
;
5447 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_REMOVED
, VDEV_AUX_NONE
);
5450 * We want to clear the stats, but we don't want to do a full
5451 * vdev_clear() as that will cause us to throw away
5452 * degraded/faulted state as well as attempt to reopen the
5453 * device, all of which is a waste.
5455 vd
->vdev_stat
.vs_read_errors
= 0;
5456 vd
->vdev_stat
.vs_write_errors
= 0;
5457 vd
->vdev_stat
.vs_checksum_errors
= 0;
5459 vdev_state_dirty(vd
->vdev_top
);
5462 for (c
= 0; c
< vd
->vdev_children
; c
++)
5463 spa_async_remove(spa
, vd
->vdev_child
[c
]);
5467 spa_async_probe(spa_t
*spa
, vdev_t
*vd
)
5471 if (vd
->vdev_probe_wanted
) {
5472 vd
->vdev_probe_wanted
= B_FALSE
;
5473 vdev_reopen(vd
); /* vdev_open() does the actual probe */
5476 for (c
= 0; c
< vd
->vdev_children
; c
++)
5477 spa_async_probe(spa
, vd
->vdev_child
[c
]);
5481 spa_async_autoexpand(spa_t
*spa
, vdev_t
*vd
)
5485 if (!spa
->spa_autoexpand
)
5488 for (c
= 0; c
< vd
->vdev_children
; c
++) {
5489 vdev_t
*cvd
= vd
->vdev_child
[c
];
5490 spa_async_autoexpand(spa
, cvd
);
5493 if (!vd
->vdev_ops
->vdev_op_leaf
|| vd
->vdev_physpath
== NULL
)
5496 spa_event_notify(vd
->vdev_spa
, vd
, FM_EREPORT_ZFS_DEVICE_AUTOEXPAND
);
5500 spa_async_thread(spa_t
*spa
)
5504 ASSERT(spa
->spa_sync_on
);
5506 mutex_enter(&spa
->spa_async_lock
);
5507 tasks
= spa
->spa_async_tasks
;
5508 spa
->spa_async_tasks
= 0;
5509 mutex_exit(&spa
->spa_async_lock
);
5512 * See if the config needs to be updated.
5514 if (tasks
& SPA_ASYNC_CONFIG_UPDATE
) {
5515 uint64_t old_space
, new_space
;
5517 mutex_enter(&spa_namespace_lock
);
5518 old_space
= metaslab_class_get_space(spa_normal_class(spa
));
5519 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
5520 new_space
= metaslab_class_get_space(spa_normal_class(spa
));
5521 mutex_exit(&spa_namespace_lock
);
5524 * If the pool grew as a result of the config update,
5525 * then log an internal history event.
5527 if (new_space
!= old_space
) {
5528 spa_history_log_internal(LOG_POOL_VDEV_ONLINE
,
5530 "pool '%s' size: %llu(+%llu)",
5531 spa_name(spa
), new_space
, new_space
- old_space
);
5536 * See if any devices need to be marked REMOVED.
5538 if (tasks
& SPA_ASYNC_REMOVE
) {
5539 spa_vdev_state_enter(spa
, SCL_NONE
);
5540 spa_async_remove(spa
, spa
->spa_root_vdev
);
5541 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
5542 spa_async_remove(spa
, spa
->spa_l2cache
.sav_vdevs
[i
]);
5543 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
5544 spa_async_remove(spa
, spa
->spa_spares
.sav_vdevs
[i
]);
5545 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5548 if ((tasks
& SPA_ASYNC_AUTOEXPAND
) && !spa_suspended(spa
)) {
5549 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5550 spa_async_autoexpand(spa
, spa
->spa_root_vdev
);
5551 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5555 * See if any devices need to be probed.
5557 if (tasks
& SPA_ASYNC_PROBE
) {
5558 spa_vdev_state_enter(spa
, SCL_NONE
);
5559 spa_async_probe(spa
, spa
->spa_root_vdev
);
5560 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5564 * If any devices are done replacing, detach them.
5566 if (tasks
& SPA_ASYNC_RESILVER_DONE
)
5567 spa_vdev_resilver_done(spa
);
5570 * Kick off a resilver.
5572 if (tasks
& SPA_ASYNC_RESILVER
)
5573 dsl_resilver_restart(spa
->spa_dsl_pool
, 0);
5576 * Let the world know that we're done.
5578 mutex_enter(&spa
->spa_async_lock
);
5579 spa
->spa_async_thread
= NULL
;
5580 cv_broadcast(&spa
->spa_async_cv
);
5581 mutex_exit(&spa
->spa_async_lock
);
5586 spa_async_suspend(spa_t
*spa
)
5588 mutex_enter(&spa
->spa_async_lock
);
5589 spa
->spa_async_suspended
++;
5590 while (spa
->spa_async_thread
!= NULL
)
5591 cv_wait(&spa
->spa_async_cv
, &spa
->spa_async_lock
);
5592 mutex_exit(&spa
->spa_async_lock
);
5596 spa_async_resume(spa_t
*spa
)
5598 mutex_enter(&spa
->spa_async_lock
);
5599 ASSERT(spa
->spa_async_suspended
!= 0);
5600 spa
->spa_async_suspended
--;
5601 mutex_exit(&spa
->spa_async_lock
);
5605 spa_async_dispatch(spa_t
*spa
)
5607 mutex_enter(&spa
->spa_async_lock
);
5608 if (spa
->spa_async_tasks
&& !spa
->spa_async_suspended
&&
5609 spa
->spa_async_thread
== NULL
&&
5610 rootdir
!= NULL
&& !vn_is_readonly(rootdir
))
5611 spa
->spa_async_thread
= thread_create(NULL
, 0,
5612 spa_async_thread
, spa
, 0, &p0
, TS_RUN
, maxclsyspri
);
5613 mutex_exit(&spa
->spa_async_lock
);
5617 spa_async_request(spa_t
*spa
, int task
)
5619 zfs_dbgmsg("spa=%s async request task=%u", spa
->spa_name
, task
);
5620 mutex_enter(&spa
->spa_async_lock
);
5621 spa
->spa_async_tasks
|= task
;
5622 mutex_exit(&spa
->spa_async_lock
);
5626 * ==========================================================================
5627 * SPA syncing routines
5628 * ==========================================================================
5632 bpobj_enqueue_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5635 bpobj_enqueue(bpo
, bp
, tx
);
5640 spa_free_sync_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5644 zio_nowait(zio_free_sync(zio
, zio
->io_spa
, dmu_tx_get_txg(tx
), bp
,
5650 spa_sync_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
*nv
, dmu_tx_t
*tx
)
5652 char *packed
= NULL
;
5657 VERIFY(nvlist_size(nv
, &nvsize
, NV_ENCODE_XDR
) == 0);
5660 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
5661 * information. This avoids the dbuf_will_dirty() path and
5662 * saves us a pre-read to get data we don't actually care about.
5664 bufsize
= P2ROUNDUP((uint64_t)nvsize
, SPA_CONFIG_BLOCKSIZE
);
5665 packed
= vmem_alloc(bufsize
, KM_PUSHPAGE
);
5667 VERIFY(nvlist_pack(nv
, &packed
, &nvsize
, NV_ENCODE_XDR
,
5669 bzero(packed
+ nvsize
, bufsize
- nvsize
);
5671 dmu_write(spa
->spa_meta_objset
, obj
, 0, bufsize
, packed
, tx
);
5673 vmem_free(packed
, bufsize
);
5675 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
5676 dmu_buf_will_dirty(db
, tx
);
5677 *(uint64_t *)db
->db_data
= nvsize
;
5678 dmu_buf_rele(db
, FTAG
);
5682 spa_sync_aux_dev(spa_t
*spa
, spa_aux_vdev_t
*sav
, dmu_tx_t
*tx
,
5683 const char *config
, const char *entry
)
5693 * Update the MOS nvlist describing the list of available devices.
5694 * spa_validate_aux() will have already made sure this nvlist is
5695 * valid and the vdevs are labeled appropriately.
5697 if (sav
->sav_object
== 0) {
5698 sav
->sav_object
= dmu_object_alloc(spa
->spa_meta_objset
,
5699 DMU_OT_PACKED_NVLIST
, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE
,
5700 sizeof (uint64_t), tx
);
5701 VERIFY(zap_update(spa
->spa_meta_objset
,
5702 DMU_POOL_DIRECTORY_OBJECT
, entry
, sizeof (uint64_t), 1,
5703 &sav
->sav_object
, tx
) == 0);
5706 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
5707 if (sav
->sav_count
== 0) {
5708 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, NULL
, 0) == 0);
5710 list
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_PUSHPAGE
);
5711 for (i
= 0; i
< sav
->sav_count
; i
++)
5712 list
[i
] = vdev_config_generate(spa
, sav
->sav_vdevs
[i
],
5713 B_FALSE
, VDEV_CONFIG_L2CACHE
);
5714 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, list
,
5715 sav
->sav_count
) == 0);
5716 for (i
= 0; i
< sav
->sav_count
; i
++)
5717 nvlist_free(list
[i
]);
5718 kmem_free(list
, sav
->sav_count
* sizeof (void *));
5721 spa_sync_nvlist(spa
, sav
->sav_object
, nvroot
, tx
);
5722 nvlist_free(nvroot
);
5724 sav
->sav_sync
= B_FALSE
;
5728 spa_sync_config_object(spa_t
*spa
, dmu_tx_t
*tx
)
5732 if (list_is_empty(&spa
->spa_config_dirty_list
))
5735 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5737 config
= spa_config_generate(spa
, spa
->spa_root_vdev
,
5738 dmu_tx_get_txg(tx
), B_FALSE
);
5740 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5742 if (spa
->spa_config_syncing
)
5743 nvlist_free(spa
->spa_config_syncing
);
5744 spa
->spa_config_syncing
= config
;
5746 spa_sync_nvlist(spa
, spa
->spa_config_object
, config
, tx
);
5750 spa_sync_version(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
5753 uint64_t version
= *(uint64_t *)arg2
;
5756 * Setting the version is special cased when first creating the pool.
5758 ASSERT(tx
->tx_txg
!= TXG_INITIAL
);
5760 ASSERT(version
<= SPA_VERSION
);
5761 ASSERT(version
>= spa_version(spa
));
5763 spa
->spa_uberblock
.ub_version
= version
;
5764 vdev_config_dirty(spa
->spa_root_vdev
);
5768 * Set zpool properties.
5771 spa_sync_props(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
5774 objset_t
*mos
= spa
->spa_meta_objset
;
5775 nvlist_t
*nvp
= arg2
;
5776 nvpair_t
*elem
= NULL
;
5778 mutex_enter(&spa
->spa_props_lock
);
5780 while ((elem
= nvlist_next_nvpair(nvp
, elem
))) {
5782 char *strval
, *fname
;
5784 const char *propname
;
5785 zprop_type_t proptype
;
5786 zfeature_info_t
*feature
;
5788 prop
= zpool_name_to_prop(nvpair_name(elem
));
5789 switch ((int)prop
) {
5792 * We checked this earlier in spa_prop_validate().
5794 ASSERT(zpool_prop_feature(nvpair_name(elem
)));
5796 fname
= strchr(nvpair_name(elem
), '@') + 1;
5797 VERIFY3U(0, ==, zfeature_lookup_name(fname
, &feature
));
5799 spa_feature_enable(spa
, feature
, tx
);
5802 case ZPOOL_PROP_VERSION
:
5803 VERIFY(nvpair_value_uint64(elem
, &intval
) == 0);
5805 * The version is synced seperatly before other
5806 * properties and should be correct by now.
5808 ASSERT3U(spa_version(spa
), >=, intval
);
5811 case ZPOOL_PROP_ALTROOT
:
5813 * 'altroot' is a non-persistent property. It should
5814 * have been set temporarily at creation or import time.
5816 ASSERT(spa
->spa_root
!= NULL
);
5819 case ZPOOL_PROP_READONLY
:
5820 case ZPOOL_PROP_CACHEFILE
:
5822 * 'readonly' and 'cachefile' are also non-persisitent
5826 case ZPOOL_PROP_COMMENT
:
5827 VERIFY(nvpair_value_string(elem
, &strval
) == 0);
5828 if (spa
->spa_comment
!= NULL
)
5829 spa_strfree(spa
->spa_comment
);
5830 spa
->spa_comment
= spa_strdup(strval
);
5832 * We need to dirty the configuration on all the vdevs
5833 * so that their labels get updated. It's unnecessary
5834 * to do this for pool creation since the vdev's
5835 * configuratoin has already been dirtied.
5837 if (tx
->tx_txg
!= TXG_INITIAL
)
5838 vdev_config_dirty(spa
->spa_root_vdev
);
5842 * Set pool property values in the poolprops mos object.
5844 if (spa
->spa_pool_props_object
== 0) {
5845 spa
->spa_pool_props_object
=
5846 zap_create_link(mos
, DMU_OT_POOL_PROPS
,
5847 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_PROPS
,
5851 /* normalize the property name */
5852 propname
= zpool_prop_to_name(prop
);
5853 proptype
= zpool_prop_get_type(prop
);
5855 if (nvpair_type(elem
) == DATA_TYPE_STRING
) {
5856 ASSERT(proptype
== PROP_TYPE_STRING
);
5857 VERIFY(nvpair_value_string(elem
, &strval
) == 0);
5858 VERIFY(zap_update(mos
,
5859 spa
->spa_pool_props_object
, propname
,
5860 1, strlen(strval
) + 1, strval
, tx
) == 0);
5862 } else if (nvpair_type(elem
) == DATA_TYPE_UINT64
) {
5863 VERIFY(nvpair_value_uint64(elem
, &intval
) == 0);
5865 if (proptype
== PROP_TYPE_INDEX
) {
5867 VERIFY(zpool_prop_index_to_string(
5868 prop
, intval
, &unused
) == 0);
5870 VERIFY(zap_update(mos
,
5871 spa
->spa_pool_props_object
, propname
,
5872 8, 1, &intval
, tx
) == 0);
5874 ASSERT(0); /* not allowed */
5878 case ZPOOL_PROP_DELEGATION
:
5879 spa
->spa_delegation
= intval
;
5881 case ZPOOL_PROP_BOOTFS
:
5882 spa
->spa_bootfs
= intval
;
5884 case ZPOOL_PROP_FAILUREMODE
:
5885 spa
->spa_failmode
= intval
;
5887 case ZPOOL_PROP_AUTOEXPAND
:
5888 spa
->spa_autoexpand
= intval
;
5889 if (tx
->tx_txg
!= TXG_INITIAL
)
5890 spa_async_request(spa
,
5891 SPA_ASYNC_AUTOEXPAND
);
5893 case ZPOOL_PROP_DEDUPDITTO
:
5894 spa
->spa_dedup_ditto
= intval
;
5901 /* log internal history if this is not a zpool create */
5902 if (spa_version(spa
) >= SPA_VERSION_ZPOOL_HISTORY
&&
5903 tx
->tx_txg
!= TXG_INITIAL
) {
5904 spa_history_log_internal(LOG_POOL_PROPSET
,
5905 spa
, tx
, "%s %lld %s",
5906 nvpair_name(elem
), intval
, spa_name(spa
));
5910 mutex_exit(&spa
->spa_props_lock
);
5914 * Perform one-time upgrade on-disk changes. spa_version() does not
5915 * reflect the new version this txg, so there must be no changes this
5916 * txg to anything that the upgrade code depends on after it executes.
5917 * Therefore this must be called after dsl_pool_sync() does the sync
5921 spa_sync_upgrades(spa_t
*spa
, dmu_tx_t
*tx
)
5923 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5925 ASSERT(spa
->spa_sync_pass
== 1);
5927 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_ORIGIN
&&
5928 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_ORIGIN
) {
5929 dsl_pool_create_origin(dp
, tx
);
5931 /* Keeping the origin open increases spa_minref */
5932 spa
->spa_minref
+= 3;
5935 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_NEXT_CLONES
&&
5936 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_NEXT_CLONES
) {
5937 dsl_pool_upgrade_clones(dp
, tx
);
5940 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_DIR_CLONES
&&
5941 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_DIR_CLONES
) {
5942 dsl_pool_upgrade_dir_clones(dp
, tx
);
5944 /* Keeping the freedir open increases spa_minref */
5945 spa
->spa_minref
+= 3;
5948 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_FEATURES
&&
5949 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_FEATURES
) {
5950 spa_feature_create_zap_objects(spa
, tx
);
5955 * Sync the specified transaction group. New blocks may be dirtied as
5956 * part of the process, so we iterate until it converges.
5959 spa_sync(spa_t
*spa
, uint64_t txg
)
5961 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5962 objset_t
*mos
= spa
->spa_meta_objset
;
5963 bpobj_t
*defer_bpo
= &spa
->spa_deferred_bpobj
;
5964 bplist_t
*free_bpl
= &spa
->spa_free_bplist
[txg
& TXG_MASK
];
5965 vdev_t
*rvd
= spa
->spa_root_vdev
;
5971 VERIFY(spa_writeable(spa
));
5974 * Lock out configuration changes.
5976 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5978 spa
->spa_syncing_txg
= txg
;
5979 spa
->spa_sync_pass
= 0;
5982 * If there are any pending vdev state changes, convert them
5983 * into config changes that go out with this transaction group.
5985 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5986 while (list_head(&spa
->spa_state_dirty_list
) != NULL
) {
5988 * We need the write lock here because, for aux vdevs,
5989 * calling vdev_config_dirty() modifies sav_config.
5990 * This is ugly and will become unnecessary when we
5991 * eliminate the aux vdev wart by integrating all vdevs
5992 * into the root vdev tree.
5994 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5995 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_WRITER
);
5996 while ((vd
= list_head(&spa
->spa_state_dirty_list
)) != NULL
) {
5997 vdev_state_clean(vd
);
5998 vdev_config_dirty(vd
);
6000 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
6001 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_READER
);
6003 spa_config_exit(spa
, SCL_STATE
, FTAG
);
6005 tx
= dmu_tx_create_assigned(dp
, txg
);
6008 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
6009 * set spa_deflate if we have no raid-z vdevs.
6011 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_RAIDZ_DEFLATE
&&
6012 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
6015 for (i
= 0; i
< rvd
->vdev_children
; i
++) {
6016 vd
= rvd
->vdev_child
[i
];
6017 if (vd
->vdev_deflate_ratio
!= SPA_MINBLOCKSIZE
)
6020 if (i
== rvd
->vdev_children
) {
6021 spa
->spa_deflate
= TRUE
;
6022 VERIFY(0 == zap_add(spa
->spa_meta_objset
,
6023 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
6024 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
));
6029 * If anything has changed in this txg, or if someone is waiting
6030 * for this txg to sync (eg, spa_vdev_remove()), push the
6031 * deferred frees from the previous txg. If not, leave them
6032 * alone so that we don't generate work on an otherwise idle
6035 if (!txg_list_empty(&dp
->dp_dirty_datasets
, txg
) ||
6036 !txg_list_empty(&dp
->dp_dirty_dirs
, txg
) ||
6037 !txg_list_empty(&dp
->dp_sync_tasks
, txg
) ||
6038 ((dsl_scan_active(dp
->dp_scan
) ||
6039 txg_sync_waiting(dp
)) && !spa_shutting_down(spa
))) {
6040 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
6041 VERIFY3U(bpobj_iterate(defer_bpo
,
6042 spa_free_sync_cb
, zio
, tx
), ==, 0);
6043 VERIFY3U(zio_wait(zio
), ==, 0);
6047 * Iterate to convergence.
6050 int pass
= ++spa
->spa_sync_pass
;
6052 spa_sync_config_object(spa
, tx
);
6053 spa_sync_aux_dev(spa
, &spa
->spa_spares
, tx
,
6054 ZPOOL_CONFIG_SPARES
, DMU_POOL_SPARES
);
6055 spa_sync_aux_dev(spa
, &spa
->spa_l2cache
, tx
,
6056 ZPOOL_CONFIG_L2CACHE
, DMU_POOL_L2CACHE
);
6057 spa_errlog_sync(spa
, txg
);
6058 dsl_pool_sync(dp
, txg
);
6060 if (pass
<= SYNC_PASS_DEFERRED_FREE
) {
6061 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
6062 bplist_iterate(free_bpl
, spa_free_sync_cb
,
6064 VERIFY(zio_wait(zio
) == 0);
6066 bplist_iterate(free_bpl
, bpobj_enqueue_cb
,
6071 dsl_scan_sync(dp
, tx
);
6073 while ((vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, txg
)))
6077 spa_sync_upgrades(spa
, tx
);
6079 } while (dmu_objset_is_dirty(mos
, txg
));
6082 * Rewrite the vdev configuration (which includes the uberblock)
6083 * to commit the transaction group.
6085 * If there are no dirty vdevs, we sync the uberblock to a few
6086 * random top-level vdevs that are known to be visible in the
6087 * config cache (see spa_vdev_add() for a complete description).
6088 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
6092 * We hold SCL_STATE to prevent vdev open/close/etc.
6093 * while we're attempting to write the vdev labels.
6095 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
6097 if (list_is_empty(&spa
->spa_config_dirty_list
)) {
6098 vdev_t
*svd
[SPA_DVAS_PER_BP
];
6100 int children
= rvd
->vdev_children
;
6101 int c0
= spa_get_random(children
);
6103 for (c
= 0; c
< children
; c
++) {
6104 vd
= rvd
->vdev_child
[(c0
+ c
) % children
];
6105 if (vd
->vdev_ms_array
== 0 || vd
->vdev_islog
)
6107 svd
[svdcount
++] = vd
;
6108 if (svdcount
== SPA_DVAS_PER_BP
)
6111 error
= vdev_config_sync(svd
, svdcount
, txg
, B_FALSE
);
6113 error
= vdev_config_sync(svd
, svdcount
, txg
,
6116 error
= vdev_config_sync(rvd
->vdev_child
,
6117 rvd
->vdev_children
, txg
, B_FALSE
);
6119 error
= vdev_config_sync(rvd
->vdev_child
,
6120 rvd
->vdev_children
, txg
, B_TRUE
);
6124 spa
->spa_last_synced_guid
= rvd
->vdev_guid
;
6126 spa_config_exit(spa
, SCL_STATE
, FTAG
);
6130 zio_suspend(spa
, NULL
);
6131 zio_resume_wait(spa
);
6136 * Clear the dirty config list.
6138 while ((vd
= list_head(&spa
->spa_config_dirty_list
)) != NULL
)
6139 vdev_config_clean(vd
);
6142 * Now that the new config has synced transactionally,
6143 * let it become visible to the config cache.
6145 if (spa
->spa_config_syncing
!= NULL
) {
6146 spa_config_set(spa
, spa
->spa_config_syncing
);
6147 spa
->spa_config_txg
= txg
;
6148 spa
->spa_config_syncing
= NULL
;
6151 spa
->spa_ubsync
= spa
->spa_uberblock
;
6153 dsl_pool_sync_done(dp
, txg
);
6156 * Update usable space statistics.
6158 while ((vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, TXG_CLEAN(txg
))))
6159 vdev_sync_done(vd
, txg
);
6161 spa_update_dspace(spa
);
6164 * It had better be the case that we didn't dirty anything
6165 * since vdev_config_sync().
6167 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
, txg
));
6168 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
6169 ASSERT(txg_list_empty(&spa
->spa_vdev_txg_list
, txg
));
6171 spa
->spa_sync_pass
= 0;
6173 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
6175 spa_handle_ignored_writes(spa
);
6178 * If any async tasks have been requested, kick them off.
6180 spa_async_dispatch(spa
);
6184 * Sync all pools. We don't want to hold the namespace lock across these
6185 * operations, so we take a reference on the spa_t and drop the lock during the
6189 spa_sync_allpools(void)
6192 mutex_enter(&spa_namespace_lock
);
6193 while ((spa
= spa_next(spa
)) != NULL
) {
6194 if (spa_state(spa
) != POOL_STATE_ACTIVE
||
6195 !spa_writeable(spa
) || spa_suspended(spa
))
6197 spa_open_ref(spa
, FTAG
);
6198 mutex_exit(&spa_namespace_lock
);
6199 txg_wait_synced(spa_get_dsl(spa
), 0);
6200 mutex_enter(&spa_namespace_lock
);
6201 spa_close(spa
, FTAG
);
6203 mutex_exit(&spa_namespace_lock
);
6207 * ==========================================================================
6208 * Miscellaneous routines
6209 * ==========================================================================
6213 * Remove all pools in the system.
6221 * Remove all cached state. All pools should be closed now,
6222 * so every spa in the AVL tree should be unreferenced.
6224 mutex_enter(&spa_namespace_lock
);
6225 while ((spa
= spa_next(NULL
)) != NULL
) {
6227 * Stop async tasks. The async thread may need to detach
6228 * a device that's been replaced, which requires grabbing
6229 * spa_namespace_lock, so we must drop it here.
6231 spa_open_ref(spa
, FTAG
);
6232 mutex_exit(&spa_namespace_lock
);
6233 spa_async_suspend(spa
);
6234 mutex_enter(&spa_namespace_lock
);
6235 spa_close(spa
, FTAG
);
6237 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
6239 spa_deactivate(spa
);
6243 mutex_exit(&spa_namespace_lock
);
6247 spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
, boolean_t aux
)
6252 if ((vd
= vdev_lookup_by_guid(spa
->spa_root_vdev
, guid
)) != NULL
)
6256 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
6257 vd
= spa
->spa_l2cache
.sav_vdevs
[i
];
6258 if (vd
->vdev_guid
== guid
)
6262 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
6263 vd
= spa
->spa_spares
.sav_vdevs
[i
];
6264 if (vd
->vdev_guid
== guid
)
6273 spa_upgrade(spa_t
*spa
, uint64_t version
)
6275 ASSERT(spa_writeable(spa
));
6277 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
6280 * This should only be called for a non-faulted pool, and since a
6281 * future version would result in an unopenable pool, this shouldn't be
6284 ASSERT(spa
->spa_uberblock
.ub_version
<= SPA_VERSION
);
6285 ASSERT(version
>= spa
->spa_uberblock
.ub_version
);
6287 spa
->spa_uberblock
.ub_version
= version
;
6288 vdev_config_dirty(spa
->spa_root_vdev
);
6290 spa_config_exit(spa
, SCL_ALL
, FTAG
);
6292 txg_wait_synced(spa_get_dsl(spa
), 0);
6296 spa_has_spare(spa_t
*spa
, uint64_t guid
)
6300 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
6302 for (i
= 0; i
< sav
->sav_count
; i
++)
6303 if (sav
->sav_vdevs
[i
]->vdev_guid
== guid
)
6306 for (i
= 0; i
< sav
->sav_npending
; i
++) {
6307 if (nvlist_lookup_uint64(sav
->sav_pending
[i
], ZPOOL_CONFIG_GUID
,
6308 &spareguid
) == 0 && spareguid
== guid
)
6316 * Check if a pool has an active shared spare device.
6317 * Note: reference count of an active spare is 2, as a spare and as a replace
6320 spa_has_active_shared_spare(spa_t
*spa
)
6324 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
6326 for (i
= 0; i
< sav
->sav_count
; i
++) {
6327 if (spa_spare_exists(sav
->sav_vdevs
[i
]->vdev_guid
, &pool
,
6328 &refcnt
) && pool
!= 0ULL && pool
== spa_guid(spa
) &&
6337 * Post a FM_EREPORT_ZFS_* event from sys/fm/fs/zfs.h. The payload will be
6338 * filled in from the spa and (optionally) the vdev. This doesn't do anything
6339 * in the userland libzpool, as we don't want consumers to misinterpret ztest
6340 * or zdb as real changes.
6343 spa_event_notify(spa_t
*spa
, vdev_t
*vd
, const char *name
)
6346 zfs_ereport_post(name
, spa
, vd
, NULL
, 0, 0);
6350 #if defined(_KERNEL) && defined(HAVE_SPL)
6351 /* state manipulation functions */
6352 EXPORT_SYMBOL(spa_open
);
6353 EXPORT_SYMBOL(spa_open_rewind
);
6354 EXPORT_SYMBOL(spa_get_stats
);
6355 EXPORT_SYMBOL(spa_create
);
6356 EXPORT_SYMBOL(spa_import_rootpool
);
6357 EXPORT_SYMBOL(spa_import
);
6358 EXPORT_SYMBOL(spa_tryimport
);
6359 EXPORT_SYMBOL(spa_destroy
);
6360 EXPORT_SYMBOL(spa_export
);
6361 EXPORT_SYMBOL(spa_reset
);
6362 EXPORT_SYMBOL(spa_async_request
);
6363 EXPORT_SYMBOL(spa_async_suspend
);
6364 EXPORT_SYMBOL(spa_async_resume
);
6365 EXPORT_SYMBOL(spa_inject_addref
);
6366 EXPORT_SYMBOL(spa_inject_delref
);
6367 EXPORT_SYMBOL(spa_scan_stat_init
);
6368 EXPORT_SYMBOL(spa_scan_get_stats
);
6370 /* device maniion */
6371 EXPORT_SYMBOL(spa_vdev_add
);
6372 EXPORT_SYMBOL(spa_vdev_attach
);
6373 EXPORT_SYMBOL(spa_vdev_detach
);
6374 EXPORT_SYMBOL(spa_vdev_remove
);
6375 EXPORT_SYMBOL(spa_vdev_setpath
);
6376 EXPORT_SYMBOL(spa_vdev_setfru
);
6377 EXPORT_SYMBOL(spa_vdev_split_mirror
);
6379 /* spare statech is global across all pools) */
6380 EXPORT_SYMBOL(spa_spare_add
);
6381 EXPORT_SYMBOL(spa_spare_remove
);
6382 EXPORT_SYMBOL(spa_spare_exists
);
6383 EXPORT_SYMBOL(spa_spare_activate
);
6385 /* L2ARC statech is global across all pools) */
6386 EXPORT_SYMBOL(spa_l2cache_add
);
6387 EXPORT_SYMBOL(spa_l2cache_remove
);
6388 EXPORT_SYMBOL(spa_l2cache_exists
);
6389 EXPORT_SYMBOL(spa_l2cache_activate
);
6390 EXPORT_SYMBOL(spa_l2cache_drop
);
6393 EXPORT_SYMBOL(spa_scan
);
6394 EXPORT_SYMBOL(spa_scan_stop
);
6397 EXPORT_SYMBOL(spa_sync
); /* only for DMU use */
6398 EXPORT_SYMBOL(spa_sync_allpools
);
6401 EXPORT_SYMBOL(spa_prop_set
);
6402 EXPORT_SYMBOL(spa_prop_get
);
6403 EXPORT_SYMBOL(spa_prop_clear_bootfs
);
6405 /* asynchronous event notification */
6406 EXPORT_SYMBOL(spa_event_notify
);