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) 2011 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>
68 #include <sys/bootprops.h>
69 #include <sys/callb.h>
70 #include <sys/cpupart.h>
72 #include <sys/sysdc.h>
77 #include "zfs_comutil.h"
79 typedef enum zti_modes
{
80 zti_mode_fixed
, /* value is # of threads (min 1) */
81 zti_mode_online_percent
, /* value is % of online CPUs */
82 zti_mode_batch
, /* cpu-intensive; value is ignored */
83 zti_mode_null
, /* don't create a taskq */
87 #define ZTI_FIX(n) { zti_mode_fixed, (n) }
88 #define ZTI_PCT(n) { zti_mode_online_percent, (n) }
89 #define ZTI_BATCH { zti_mode_batch, 0 }
90 #define ZTI_NULL { zti_mode_null, 0 }
92 #define ZTI_ONE ZTI_FIX(1)
94 typedef struct zio_taskq_info
{
95 enum zti_modes zti_mode
;
99 static const char *const zio_taskq_types
[ZIO_TASKQ_TYPES
] = {
100 "iss", "iss_h", "int", "int_h"
104 * Define the taskq threads for the following I/O types:
105 * NULL, READ, WRITE, FREE, CLAIM, and IOCTL
107 const zio_taskq_info_t zio_taskqs
[ZIO_TYPES
][ZIO_TASKQ_TYPES
] = {
108 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */
109 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
110 { ZTI_FIX(8), ZTI_NULL
, ZTI_BATCH
, ZTI_NULL
},
111 { ZTI_BATCH
, ZTI_FIX(5), ZTI_FIX(16), ZTI_FIX(5) },
112 { ZTI_PCT(100), ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
113 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
114 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
117 static dsl_syncfunc_t spa_sync_props
;
118 static boolean_t
spa_has_active_shared_spare(spa_t
*spa
);
119 static inline int spa_load_impl(spa_t
*spa
, uint64_t, nvlist_t
*config
,
120 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
122 static void spa_vdev_resilver_done(spa_t
*spa
);
124 uint_t zio_taskq_batch_pct
= 100; /* 1 thread per cpu in pset */
125 id_t zio_taskq_psrset_bind
= PS_NONE
;
126 boolean_t zio_taskq_sysdc
= B_TRUE
; /* use SDC scheduling class */
127 uint_t zio_taskq_basedc
= 80; /* base duty cycle */
129 boolean_t spa_create_process
= B_TRUE
; /* no process ==> no sysdc */
132 * This (illegal) pool name is used when temporarily importing a spa_t in order
133 * to get the vdev stats associated with the imported devices.
135 #define TRYIMPORT_NAME "$import"
138 * ==========================================================================
139 * SPA properties routines
140 * ==========================================================================
144 * Add a (source=src, propname=propval) list to an nvlist.
147 spa_prop_add_list(nvlist_t
*nvl
, zpool_prop_t prop
, char *strval
,
148 uint64_t intval
, zprop_source_t src
)
150 const char *propname
= zpool_prop_to_name(prop
);
153 VERIFY(nvlist_alloc(&propval
, NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
154 VERIFY(nvlist_add_uint64(propval
, ZPROP_SOURCE
, src
) == 0);
157 VERIFY(nvlist_add_string(propval
, ZPROP_VALUE
, strval
) == 0);
159 VERIFY(nvlist_add_uint64(propval
, ZPROP_VALUE
, intval
) == 0);
161 VERIFY(nvlist_add_nvlist(nvl
, propname
, propval
) == 0);
162 nvlist_free(propval
);
166 * Get property values from the spa configuration.
169 spa_prop_get_config(spa_t
*spa
, nvlist_t
**nvp
)
173 uint64_t cap
, version
;
174 zprop_source_t src
= ZPROP_SRC_NONE
;
175 spa_config_dirent_t
*dp
;
177 ASSERT(MUTEX_HELD(&spa
->spa_props_lock
));
179 if (spa
->spa_root_vdev
!= NULL
) {
180 alloc
= metaslab_class_get_alloc(spa_normal_class(spa
));
181 size
= metaslab_class_get_space(spa_normal_class(spa
));
182 spa_prop_add_list(*nvp
, ZPOOL_PROP_NAME
, spa_name(spa
), 0, src
);
183 spa_prop_add_list(*nvp
, ZPOOL_PROP_SIZE
, NULL
, size
, src
);
184 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALLOCATED
, NULL
, alloc
, src
);
185 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREE
, NULL
,
187 spa_prop_add_list(*nvp
, ZPOOL_PROP_READONLY
, NULL
,
188 (spa_mode(spa
) == FREAD
), src
);
190 cap
= (size
== 0) ? 0 : (alloc
* 100 / size
);
191 spa_prop_add_list(*nvp
, ZPOOL_PROP_CAPACITY
, NULL
, cap
, src
);
193 spa_prop_add_list(*nvp
, ZPOOL_PROP_DEDUPRATIO
, NULL
,
194 ddt_get_pool_dedup_ratio(spa
), src
);
196 spa_prop_add_list(*nvp
, ZPOOL_PROP_HEALTH
, NULL
,
197 spa
->spa_root_vdev
->vdev_state
, src
);
199 version
= spa_version(spa
);
200 if (version
== zpool_prop_default_numeric(ZPOOL_PROP_VERSION
))
201 src
= ZPROP_SRC_DEFAULT
;
203 src
= ZPROP_SRC_LOCAL
;
204 spa_prop_add_list(*nvp
, ZPOOL_PROP_VERSION
, NULL
, version
, src
);
207 spa_prop_add_list(*nvp
, ZPOOL_PROP_GUID
, NULL
, spa_guid(spa
), src
);
209 if (spa
->spa_comment
!= NULL
) {
210 spa_prop_add_list(*nvp
, ZPOOL_PROP_COMMENT
, spa
->spa_comment
,
214 if (spa
->spa_root
!= NULL
)
215 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALTROOT
, spa
->spa_root
,
218 if ((dp
= list_head(&spa
->spa_config_list
)) != NULL
) {
219 if (dp
->scd_path
== NULL
) {
220 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
221 "none", 0, ZPROP_SRC_LOCAL
);
222 } else if (strcmp(dp
->scd_path
, spa_config_path
) != 0) {
223 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
224 dp
->scd_path
, 0, ZPROP_SRC_LOCAL
);
230 * Get zpool property values.
233 spa_prop_get(spa_t
*spa
, nvlist_t
**nvp
)
235 objset_t
*mos
= spa
->spa_meta_objset
;
240 err
= nvlist_alloc(nvp
, NV_UNIQUE_NAME
, KM_PUSHPAGE
);
244 mutex_enter(&spa
->spa_props_lock
);
247 * Get properties from the spa config.
249 spa_prop_get_config(spa
, nvp
);
251 /* If no pool property object, no more prop to get. */
252 if (mos
== NULL
|| spa
->spa_pool_props_object
== 0) {
253 mutex_exit(&spa
->spa_props_lock
);
258 * Get properties from the MOS pool property object.
260 for (zap_cursor_init(&zc
, mos
, spa
->spa_pool_props_object
);
261 (err
= zap_cursor_retrieve(&zc
, &za
)) == 0;
262 zap_cursor_advance(&zc
)) {
265 zprop_source_t src
= ZPROP_SRC_DEFAULT
;
268 if ((prop
= zpool_name_to_prop(za
.za_name
)) == ZPROP_INVAL
)
271 switch (za
.za_integer_length
) {
273 /* integer property */
274 if (za
.za_first_integer
!=
275 zpool_prop_default_numeric(prop
))
276 src
= ZPROP_SRC_LOCAL
;
278 if (prop
== ZPOOL_PROP_BOOTFS
) {
280 dsl_dataset_t
*ds
= NULL
;
282 dp
= spa_get_dsl(spa
);
283 rw_enter(&dp
->dp_config_rwlock
, RW_READER
);
284 if ((err
= dsl_dataset_hold_obj(dp
,
285 za
.za_first_integer
, FTAG
, &ds
))) {
286 rw_exit(&dp
->dp_config_rwlock
);
291 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1,
293 dsl_dataset_name(ds
, strval
);
294 dsl_dataset_rele(ds
, FTAG
);
295 rw_exit(&dp
->dp_config_rwlock
);
298 intval
= za
.za_first_integer
;
301 spa_prop_add_list(*nvp
, prop
, strval
, intval
, src
);
305 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1);
310 /* string property */
311 strval
= kmem_alloc(za
.za_num_integers
, KM_PUSHPAGE
);
312 err
= zap_lookup(mos
, spa
->spa_pool_props_object
,
313 za
.za_name
, 1, za
.za_num_integers
, strval
);
315 kmem_free(strval
, za
.za_num_integers
);
318 spa_prop_add_list(*nvp
, prop
, strval
, 0, src
);
319 kmem_free(strval
, za
.za_num_integers
);
326 zap_cursor_fini(&zc
);
327 mutex_exit(&spa
->spa_props_lock
);
329 if (err
&& err
!= ENOENT
) {
339 * Validate the given pool properties nvlist and modify the list
340 * for the property values to be set.
343 spa_prop_validate(spa_t
*spa
, nvlist_t
*props
)
346 int error
= 0, reset_bootfs
= 0;
350 while ((elem
= nvlist_next_nvpair(props
, elem
)) != NULL
) {
352 char *propname
, *strval
;
357 propname
= nvpair_name(elem
);
359 if ((prop
= zpool_name_to_prop(propname
)) == ZPROP_INVAL
)
363 case ZPOOL_PROP_VERSION
:
364 error
= nvpair_value_uint64(elem
, &intval
);
366 (intval
< spa_version(spa
) || intval
> SPA_VERSION
))
370 case ZPOOL_PROP_DELEGATION
:
371 case ZPOOL_PROP_AUTOREPLACE
:
372 case ZPOOL_PROP_LISTSNAPS
:
373 case ZPOOL_PROP_AUTOEXPAND
:
374 error
= nvpair_value_uint64(elem
, &intval
);
375 if (!error
&& intval
> 1)
379 case ZPOOL_PROP_BOOTFS
:
381 * If the pool version is less than SPA_VERSION_BOOTFS,
382 * or the pool is still being created (version == 0),
383 * the bootfs property cannot be set.
385 if (spa_version(spa
) < SPA_VERSION_BOOTFS
) {
391 * Make sure the vdev config is bootable
393 if (!vdev_is_bootable(spa
->spa_root_vdev
)) {
400 error
= nvpair_value_string(elem
, &strval
);
405 if (strval
== NULL
|| strval
[0] == '\0') {
406 objnum
= zpool_prop_default_numeric(
411 if ((error
= dmu_objset_hold(strval
,FTAG
,&os
)))
414 /* Must be ZPL and not gzip compressed. */
416 if (dmu_objset_type(os
) != DMU_OST_ZFS
) {
418 } else if ((error
= dsl_prop_get_integer(strval
,
419 zfs_prop_to_name(ZFS_PROP_COMPRESSION
),
420 &compress
, NULL
)) == 0 &&
421 !BOOTFS_COMPRESS_VALID(compress
)) {
424 objnum
= dmu_objset_id(os
);
426 dmu_objset_rele(os
, FTAG
);
430 case ZPOOL_PROP_FAILUREMODE
:
431 error
= nvpair_value_uint64(elem
, &intval
);
432 if (!error
&& (intval
< ZIO_FAILURE_MODE_WAIT
||
433 intval
> ZIO_FAILURE_MODE_PANIC
))
437 * This is a special case which only occurs when
438 * the pool has completely failed. This allows
439 * the user to change the in-core failmode property
440 * without syncing it out to disk (I/Os might
441 * currently be blocked). We do this by returning
442 * EIO to the caller (spa_prop_set) to trick it
443 * into thinking we encountered a property validation
446 if (!error
&& spa_suspended(spa
)) {
447 spa
->spa_failmode
= intval
;
452 case ZPOOL_PROP_CACHEFILE
:
453 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
456 if (strval
[0] == '\0')
459 if (strcmp(strval
, "none") == 0)
462 if (strval
[0] != '/') {
467 slash
= strrchr(strval
, '/');
468 ASSERT(slash
!= NULL
);
470 if (slash
[1] == '\0' || strcmp(slash
, "/.") == 0 ||
471 strcmp(slash
, "/..") == 0)
475 case ZPOOL_PROP_COMMENT
:
476 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
478 for (check
= strval
; *check
!= '\0'; check
++) {
479 if (!isprint(*check
)) {
485 if (strlen(strval
) > ZPROP_MAX_COMMENT
)
489 case ZPOOL_PROP_DEDUPDITTO
:
490 if (spa_version(spa
) < SPA_VERSION_DEDUP
)
493 error
= nvpair_value_uint64(elem
, &intval
);
495 intval
!= 0 && intval
< ZIO_DEDUPDITTO_MIN
)
507 if (!error
&& reset_bootfs
) {
508 error
= nvlist_remove(props
,
509 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), DATA_TYPE_STRING
);
512 error
= nvlist_add_uint64(props
,
513 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), objnum
);
521 spa_configfile_set(spa_t
*spa
, nvlist_t
*nvp
, boolean_t need_sync
)
524 spa_config_dirent_t
*dp
;
526 if (nvlist_lookup_string(nvp
, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE
),
530 dp
= kmem_alloc(sizeof (spa_config_dirent_t
),
533 if (cachefile
[0] == '\0')
534 dp
->scd_path
= spa_strdup(spa_config_path
);
535 else if (strcmp(cachefile
, "none") == 0)
538 dp
->scd_path
= spa_strdup(cachefile
);
540 list_insert_head(&spa
->spa_config_list
, dp
);
542 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
546 spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
)
550 boolean_t need_sync
= B_FALSE
;
553 if ((error
= spa_prop_validate(spa
, nvp
)) != 0)
557 while ((elem
= nvlist_next_nvpair(nvp
, elem
)) != NULL
) {
558 if ((prop
= zpool_name_to_prop(
559 nvpair_name(elem
))) == ZPROP_INVAL
)
562 if (prop
== ZPOOL_PROP_CACHEFILE
||
563 prop
== ZPOOL_PROP_ALTROOT
||
564 prop
== ZPOOL_PROP_READONLY
)
572 return (dsl_sync_task_do(spa_get_dsl(spa
), NULL
, spa_sync_props
,
579 * If the bootfs property value is dsobj, clear it.
582 spa_prop_clear_bootfs(spa_t
*spa
, uint64_t dsobj
, dmu_tx_t
*tx
)
584 if (spa
->spa_bootfs
== dsobj
&& spa
->spa_pool_props_object
!= 0) {
585 VERIFY(zap_remove(spa
->spa_meta_objset
,
586 spa
->spa_pool_props_object
,
587 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), tx
) == 0);
593 * Change the GUID for the pool. This is done so that we can later
594 * re-import a pool built from a clone of our own vdevs. We will modify
595 * the root vdev's guid, our own pool guid, and then mark all of our
596 * vdevs dirty. Note that we must make sure that all our vdevs are
597 * online when we do this, or else any vdevs that weren't present
598 * would be orphaned from our pool. We are also going to issue a
599 * sysevent to update any watchers.
602 spa_change_guid(spa_t
*spa
)
604 uint64_t oldguid
, newguid
;
607 if (!(spa_mode_global
& FWRITE
))
610 txg
= spa_vdev_enter(spa
);
612 if (spa
->spa_root_vdev
->vdev_state
!= VDEV_STATE_HEALTHY
)
613 return (spa_vdev_exit(spa
, NULL
, txg
, ENXIO
));
615 oldguid
= spa_guid(spa
);
616 newguid
= spa_generate_guid(NULL
);
617 ASSERT3U(oldguid
, !=, newguid
);
619 spa
->spa_root_vdev
->vdev_guid
= newguid
;
620 spa
->spa_root_vdev
->vdev_guid_sum
+= (newguid
- oldguid
);
622 vdev_config_dirty(spa
->spa_root_vdev
);
624 spa_event_notify(spa
, NULL
, FM_EREPORT_ZFS_POOL_REGUID
);
626 return (spa_vdev_exit(spa
, NULL
, txg
, 0));
630 * ==========================================================================
631 * SPA state manipulation (open/create/destroy/import/export)
632 * ==========================================================================
636 spa_error_entry_compare(const void *a
, const void *b
)
638 spa_error_entry_t
*sa
= (spa_error_entry_t
*)a
;
639 spa_error_entry_t
*sb
= (spa_error_entry_t
*)b
;
642 ret
= bcmp(&sa
->se_bookmark
, &sb
->se_bookmark
,
643 sizeof (zbookmark_t
));
654 * Utility function which retrieves copies of the current logs and
655 * re-initializes them in the process.
658 spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
)
660 ASSERT(MUTEX_HELD(&spa
->spa_errlist_lock
));
662 bcopy(&spa
->spa_errlist_last
, last
, sizeof (avl_tree_t
));
663 bcopy(&spa
->spa_errlist_scrub
, scrub
, sizeof (avl_tree_t
));
665 avl_create(&spa
->spa_errlist_scrub
,
666 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
667 offsetof(spa_error_entry_t
, se_avl
));
668 avl_create(&spa
->spa_errlist_last
,
669 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
670 offsetof(spa_error_entry_t
, se_avl
));
674 spa_taskq_create(spa_t
*spa
, const char *name
, enum zti_modes mode
,
677 uint_t flags
= TASKQ_PREPOPULATE
;
678 boolean_t batch
= B_FALSE
;
682 return (NULL
); /* no taskq needed */
685 ASSERT3U(value
, >=, 1);
686 value
= MAX(value
, 1);
691 flags
|= TASKQ_THREADS_CPU_PCT
;
692 value
= zio_taskq_batch_pct
;
695 case zti_mode_online_percent
:
696 flags
|= TASKQ_THREADS_CPU_PCT
;
700 panic("unrecognized mode for %s taskq (%u:%u) in "
706 if (zio_taskq_sysdc
&& spa
->spa_proc
!= &p0
) {
708 flags
|= TASKQ_DC_BATCH
;
710 return (taskq_create_sysdc(name
, value
, 50, INT_MAX
,
711 spa
->spa_proc
, zio_taskq_basedc
, flags
));
713 return (taskq_create_proc(name
, value
, maxclsyspri
, 50, INT_MAX
,
714 spa
->spa_proc
, flags
));
718 spa_create_zio_taskqs(spa_t
*spa
)
722 for (t
= 0; t
< ZIO_TYPES
; t
++) {
723 for (q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
724 const zio_taskq_info_t
*ztip
= &zio_taskqs
[t
][q
];
725 enum zti_modes mode
= ztip
->zti_mode
;
726 uint_t value
= ztip
->zti_value
;
729 (void) snprintf(name
, sizeof (name
),
730 "%s_%s", zio_type_name
[t
], zio_taskq_types
[q
]);
732 spa
->spa_zio_taskq
[t
][q
] =
733 spa_taskq_create(spa
, name
, mode
, value
);
738 #if defined(_KERNEL) && defined(HAVE_SPA_THREAD)
740 spa_thread(void *arg
)
745 user_t
*pu
= PTOU(curproc
);
747 CALLB_CPR_INIT(&cprinfo
, &spa
->spa_proc_lock
, callb_generic_cpr
,
750 ASSERT(curproc
!= &p0
);
751 (void) snprintf(pu
->u_psargs
, sizeof (pu
->u_psargs
),
752 "zpool-%s", spa
->spa_name
);
753 (void) strlcpy(pu
->u_comm
, pu
->u_psargs
, sizeof (pu
->u_comm
));
755 /* bind this thread to the requested psrset */
756 if (zio_taskq_psrset_bind
!= PS_NONE
) {
758 mutex_enter(&cpu_lock
);
759 mutex_enter(&pidlock
);
760 mutex_enter(&curproc
->p_lock
);
762 if (cpupart_bind_thread(curthread
, zio_taskq_psrset_bind
,
763 0, NULL
, NULL
) == 0) {
764 curthread
->t_bind_pset
= zio_taskq_psrset_bind
;
767 "Couldn't bind process for zfs pool \"%s\" to "
768 "pset %d\n", spa
->spa_name
, zio_taskq_psrset_bind
);
771 mutex_exit(&curproc
->p_lock
);
772 mutex_exit(&pidlock
);
773 mutex_exit(&cpu_lock
);
777 if (zio_taskq_sysdc
) {
778 sysdc_thread_enter(curthread
, 100, 0);
781 spa
->spa_proc
= curproc
;
782 spa
->spa_did
= curthread
->t_did
;
784 spa_create_zio_taskqs(spa
);
786 mutex_enter(&spa
->spa_proc_lock
);
787 ASSERT(spa
->spa_proc_state
== SPA_PROC_CREATED
);
789 spa
->spa_proc_state
= SPA_PROC_ACTIVE
;
790 cv_broadcast(&spa
->spa_proc_cv
);
792 CALLB_CPR_SAFE_BEGIN(&cprinfo
);
793 while (spa
->spa_proc_state
== SPA_PROC_ACTIVE
)
794 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
795 CALLB_CPR_SAFE_END(&cprinfo
, &spa
->spa_proc_lock
);
797 ASSERT(spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
);
798 spa
->spa_proc_state
= SPA_PROC_GONE
;
800 cv_broadcast(&spa
->spa_proc_cv
);
801 CALLB_CPR_EXIT(&cprinfo
); /* drops spa_proc_lock */
803 mutex_enter(&curproc
->p_lock
);
809 * Activate an uninitialized pool.
812 spa_activate(spa_t
*spa
, int mode
)
814 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
816 spa
->spa_state
= POOL_STATE_ACTIVE
;
817 spa
->spa_mode
= mode
;
819 spa
->spa_normal_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
820 spa
->spa_log_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
822 /* Try to create a covering process */
823 mutex_enter(&spa
->spa_proc_lock
);
824 ASSERT(spa
->spa_proc_state
== SPA_PROC_NONE
);
825 ASSERT(spa
->spa_proc
== &p0
);
828 #ifdef HAVE_SPA_THREAD
829 /* Only create a process if we're going to be around a while. */
830 if (spa_create_process
&& strcmp(spa
->spa_name
, TRYIMPORT_NAME
) != 0) {
831 if (newproc(spa_thread
, (caddr_t
)spa
, syscid
, maxclsyspri
,
833 spa
->spa_proc_state
= SPA_PROC_CREATED
;
834 while (spa
->spa_proc_state
== SPA_PROC_CREATED
) {
835 cv_wait(&spa
->spa_proc_cv
,
836 &spa
->spa_proc_lock
);
838 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
839 ASSERT(spa
->spa_proc
!= &p0
);
840 ASSERT(spa
->spa_did
!= 0);
844 "Couldn't create process for zfs pool \"%s\"\n",
849 #endif /* HAVE_SPA_THREAD */
850 mutex_exit(&spa
->spa_proc_lock
);
852 /* If we didn't create a process, we need to create our taskqs. */
853 if (spa
->spa_proc
== &p0
) {
854 spa_create_zio_taskqs(spa
);
857 list_create(&spa
->spa_config_dirty_list
, sizeof (vdev_t
),
858 offsetof(vdev_t
, vdev_config_dirty_node
));
859 list_create(&spa
->spa_state_dirty_list
, sizeof (vdev_t
),
860 offsetof(vdev_t
, vdev_state_dirty_node
));
862 txg_list_create(&spa
->spa_vdev_txg_list
,
863 offsetof(struct vdev
, vdev_txg_node
));
865 avl_create(&spa
->spa_errlist_scrub
,
866 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
867 offsetof(spa_error_entry_t
, se_avl
));
868 avl_create(&spa
->spa_errlist_last
,
869 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
870 offsetof(spa_error_entry_t
, se_avl
));
874 * Opposite of spa_activate().
877 spa_deactivate(spa_t
*spa
)
881 ASSERT(spa
->spa_sync_on
== B_FALSE
);
882 ASSERT(spa
->spa_dsl_pool
== NULL
);
883 ASSERT(spa
->spa_root_vdev
== NULL
);
884 ASSERT(spa
->spa_async_zio_root
== NULL
);
885 ASSERT(spa
->spa_state
!= POOL_STATE_UNINITIALIZED
);
887 txg_list_destroy(&spa
->spa_vdev_txg_list
);
889 list_destroy(&spa
->spa_config_dirty_list
);
890 list_destroy(&spa
->spa_state_dirty_list
);
892 for (t
= 0; t
< ZIO_TYPES
; t
++) {
893 for (q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
894 if (spa
->spa_zio_taskq
[t
][q
] != NULL
)
895 taskq_destroy(spa
->spa_zio_taskq
[t
][q
]);
896 spa
->spa_zio_taskq
[t
][q
] = NULL
;
900 metaslab_class_destroy(spa
->spa_normal_class
);
901 spa
->spa_normal_class
= NULL
;
903 metaslab_class_destroy(spa
->spa_log_class
);
904 spa
->spa_log_class
= NULL
;
907 * If this was part of an import or the open otherwise failed, we may
908 * still have errors left in the queues. Empty them just in case.
910 spa_errlog_drain(spa
);
912 avl_destroy(&spa
->spa_errlist_scrub
);
913 avl_destroy(&spa
->spa_errlist_last
);
915 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
917 mutex_enter(&spa
->spa_proc_lock
);
918 if (spa
->spa_proc_state
!= SPA_PROC_NONE
) {
919 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
920 spa
->spa_proc_state
= SPA_PROC_DEACTIVATE
;
921 cv_broadcast(&spa
->spa_proc_cv
);
922 while (spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
) {
923 ASSERT(spa
->spa_proc
!= &p0
);
924 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
926 ASSERT(spa
->spa_proc_state
== SPA_PROC_GONE
);
927 spa
->spa_proc_state
= SPA_PROC_NONE
;
929 ASSERT(spa
->spa_proc
== &p0
);
930 mutex_exit(&spa
->spa_proc_lock
);
933 * We want to make sure spa_thread() has actually exited the ZFS
934 * module, so that the module can't be unloaded out from underneath
937 if (spa
->spa_did
!= 0) {
938 thread_join(spa
->spa_did
);
944 * Verify a pool configuration, and construct the vdev tree appropriately. This
945 * will create all the necessary vdevs in the appropriate layout, with each vdev
946 * in the CLOSED state. This will prep the pool before open/creation/import.
947 * All vdev validation is done by the vdev_alloc() routine.
950 spa_config_parse(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
,
951 uint_t id
, int atype
)
958 if ((error
= vdev_alloc(spa
, vdp
, nv
, parent
, id
, atype
)) != 0)
961 if ((*vdp
)->vdev_ops
->vdev_op_leaf
)
964 error
= nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
976 for (c
= 0; c
< children
; c
++) {
978 if ((error
= spa_config_parse(spa
, &vd
, child
[c
], *vdp
, c
,
986 ASSERT(*vdp
!= NULL
);
992 * Opposite of spa_load().
995 spa_unload(spa_t
*spa
)
999 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1004 spa_async_suspend(spa
);
1009 if (spa
->spa_sync_on
) {
1010 txg_sync_stop(spa
->spa_dsl_pool
);
1011 spa
->spa_sync_on
= B_FALSE
;
1015 * Wait for any outstanding async I/O to complete.
1017 if (spa
->spa_async_zio_root
!= NULL
) {
1018 (void) zio_wait(spa
->spa_async_zio_root
);
1019 spa
->spa_async_zio_root
= NULL
;
1022 bpobj_close(&spa
->spa_deferred_bpobj
);
1025 * Close the dsl pool.
1027 if (spa
->spa_dsl_pool
) {
1028 dsl_pool_close(spa
->spa_dsl_pool
);
1029 spa
->spa_dsl_pool
= NULL
;
1030 spa
->spa_meta_objset
= NULL
;
1035 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1038 * Drop and purge level 2 cache
1040 spa_l2cache_drop(spa
);
1045 if (spa
->spa_root_vdev
)
1046 vdev_free(spa
->spa_root_vdev
);
1047 ASSERT(spa
->spa_root_vdev
== NULL
);
1049 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1050 vdev_free(spa
->spa_spares
.sav_vdevs
[i
]);
1051 if (spa
->spa_spares
.sav_vdevs
) {
1052 kmem_free(spa
->spa_spares
.sav_vdevs
,
1053 spa
->spa_spares
.sav_count
* sizeof (void *));
1054 spa
->spa_spares
.sav_vdevs
= NULL
;
1056 if (spa
->spa_spares
.sav_config
) {
1057 nvlist_free(spa
->spa_spares
.sav_config
);
1058 spa
->spa_spares
.sav_config
= NULL
;
1060 spa
->spa_spares
.sav_count
= 0;
1062 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
1063 vdev_clear_stats(spa
->spa_l2cache
.sav_vdevs
[i
]);
1064 vdev_free(spa
->spa_l2cache
.sav_vdevs
[i
]);
1066 if (spa
->spa_l2cache
.sav_vdevs
) {
1067 kmem_free(spa
->spa_l2cache
.sav_vdevs
,
1068 spa
->spa_l2cache
.sav_count
* sizeof (void *));
1069 spa
->spa_l2cache
.sav_vdevs
= NULL
;
1071 if (spa
->spa_l2cache
.sav_config
) {
1072 nvlist_free(spa
->spa_l2cache
.sav_config
);
1073 spa
->spa_l2cache
.sav_config
= NULL
;
1075 spa
->spa_l2cache
.sav_count
= 0;
1077 spa
->spa_async_suspended
= 0;
1079 if (spa
->spa_comment
!= NULL
) {
1080 spa_strfree(spa
->spa_comment
);
1081 spa
->spa_comment
= NULL
;
1084 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1088 * Load (or re-load) the current list of vdevs describing the active spares for
1089 * this pool. When this is called, we have some form of basic information in
1090 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1091 * then re-generate a more complete list including status information.
1094 spa_load_spares(spa_t
*spa
)
1101 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1104 * First, close and free any existing spare vdevs.
1106 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1107 vd
= spa
->spa_spares
.sav_vdevs
[i
];
1109 /* Undo the call to spa_activate() below */
1110 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1111 B_FALSE
)) != NULL
&& tvd
->vdev_isspare
)
1112 spa_spare_remove(tvd
);
1117 if (spa
->spa_spares
.sav_vdevs
)
1118 kmem_free(spa
->spa_spares
.sav_vdevs
,
1119 spa
->spa_spares
.sav_count
* sizeof (void *));
1121 if (spa
->spa_spares
.sav_config
== NULL
)
1124 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
1125 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
1127 spa
->spa_spares
.sav_count
= (int)nspares
;
1128 spa
->spa_spares
.sav_vdevs
= NULL
;
1134 * Construct the array of vdevs, opening them to get status in the
1135 * process. For each spare, there is potentially two different vdev_t
1136 * structures associated with it: one in the list of spares (used only
1137 * for basic validation purposes) and one in the active vdev
1138 * configuration (if it's spared in). During this phase we open and
1139 * validate each vdev on the spare list. If the vdev also exists in the
1140 * active configuration, then we also mark this vdev as an active spare.
1142 spa
->spa_spares
.sav_vdevs
= kmem_alloc(nspares
* sizeof (void *),
1144 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1145 VERIFY(spa_config_parse(spa
, &vd
, spares
[i
], NULL
, 0,
1146 VDEV_ALLOC_SPARE
) == 0);
1149 spa
->spa_spares
.sav_vdevs
[i
] = vd
;
1151 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1152 B_FALSE
)) != NULL
) {
1153 if (!tvd
->vdev_isspare
)
1157 * We only mark the spare active if we were successfully
1158 * able to load the vdev. Otherwise, importing a pool
1159 * with a bad active spare would result in strange
1160 * behavior, because multiple pool would think the spare
1161 * is actively in use.
1163 * There is a vulnerability here to an equally bizarre
1164 * circumstance, where a dead active spare is later
1165 * brought back to life (onlined or otherwise). Given
1166 * the rarity of this scenario, and the extra complexity
1167 * it adds, we ignore the possibility.
1169 if (!vdev_is_dead(tvd
))
1170 spa_spare_activate(tvd
);
1174 vd
->vdev_aux
= &spa
->spa_spares
;
1176 if (vdev_open(vd
) != 0)
1179 if (vdev_validate_aux(vd
) == 0)
1184 * Recompute the stashed list of spares, with status information
1187 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
, ZPOOL_CONFIG_SPARES
,
1188 DATA_TYPE_NVLIST_ARRAY
) == 0);
1190 spares
= kmem_alloc(spa
->spa_spares
.sav_count
* sizeof (void *),
1192 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1193 spares
[i
] = vdev_config_generate(spa
,
1194 spa
->spa_spares
.sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_SPARE
);
1195 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
1196 ZPOOL_CONFIG_SPARES
, spares
, spa
->spa_spares
.sav_count
) == 0);
1197 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1198 nvlist_free(spares
[i
]);
1199 kmem_free(spares
, spa
->spa_spares
.sav_count
* sizeof (void *));
1203 * Load (or re-load) the current list of vdevs describing the active l2cache for
1204 * this pool. When this is called, we have some form of basic information in
1205 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1206 * then re-generate a more complete list including status information.
1207 * Devices which are already active have their details maintained, and are
1211 spa_load_l2cache(spa_t
*spa
)
1215 int i
, j
, oldnvdevs
;
1217 vdev_t
*vd
, **oldvdevs
, **newvdevs
= NULL
;
1218 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
1220 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1222 if (sav
->sav_config
!= NULL
) {
1223 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
1224 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
1225 newvdevs
= kmem_alloc(nl2cache
* sizeof (void *), KM_PUSHPAGE
);
1230 oldvdevs
= sav
->sav_vdevs
;
1231 oldnvdevs
= sav
->sav_count
;
1232 sav
->sav_vdevs
= NULL
;
1236 * Process new nvlist of vdevs.
1238 for (i
= 0; i
< nl2cache
; i
++) {
1239 VERIFY(nvlist_lookup_uint64(l2cache
[i
], ZPOOL_CONFIG_GUID
,
1243 for (j
= 0; j
< oldnvdevs
; j
++) {
1245 if (vd
!= NULL
&& guid
== vd
->vdev_guid
) {
1247 * Retain previous vdev for add/remove ops.
1255 if (newvdevs
[i
] == NULL
) {
1259 VERIFY(spa_config_parse(spa
, &vd
, l2cache
[i
], NULL
, 0,
1260 VDEV_ALLOC_L2CACHE
) == 0);
1265 * Commit this vdev as an l2cache device,
1266 * even if it fails to open.
1268 spa_l2cache_add(vd
);
1273 spa_l2cache_activate(vd
);
1275 if (vdev_open(vd
) != 0)
1278 (void) vdev_validate_aux(vd
);
1280 if (!vdev_is_dead(vd
))
1281 l2arc_add_vdev(spa
, vd
);
1286 * Purge vdevs that were dropped
1288 for (i
= 0; i
< oldnvdevs
; i
++) {
1293 ASSERT(vd
->vdev_isl2cache
);
1295 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
1296 pool
!= 0ULL && l2arc_vdev_present(vd
))
1297 l2arc_remove_vdev(vd
);
1298 vdev_clear_stats(vd
);
1304 kmem_free(oldvdevs
, oldnvdevs
* sizeof (void *));
1306 if (sav
->sav_config
== NULL
)
1309 sav
->sav_vdevs
= newvdevs
;
1310 sav
->sav_count
= (int)nl2cache
;
1313 * Recompute the stashed list of l2cache devices, with status
1314 * information this time.
1316 VERIFY(nvlist_remove(sav
->sav_config
, ZPOOL_CONFIG_L2CACHE
,
1317 DATA_TYPE_NVLIST_ARRAY
) == 0);
1319 l2cache
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_PUSHPAGE
);
1320 for (i
= 0; i
< sav
->sav_count
; i
++)
1321 l2cache
[i
] = vdev_config_generate(spa
,
1322 sav
->sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_L2CACHE
);
1323 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
1324 ZPOOL_CONFIG_L2CACHE
, l2cache
, sav
->sav_count
) == 0);
1326 for (i
= 0; i
< sav
->sav_count
; i
++)
1327 nvlist_free(l2cache
[i
]);
1329 kmem_free(l2cache
, sav
->sav_count
* sizeof (void *));
1333 load_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
**value
)
1336 char *packed
= NULL
;
1341 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
1342 nvsize
= *(uint64_t *)db
->db_data
;
1343 dmu_buf_rele(db
, FTAG
);
1345 packed
= kmem_alloc(nvsize
, KM_PUSHPAGE
| KM_NODEBUG
);
1346 error
= dmu_read(spa
->spa_meta_objset
, obj
, 0, nvsize
, packed
,
1349 error
= nvlist_unpack(packed
, nvsize
, value
, 0);
1350 kmem_free(packed
, nvsize
);
1356 * Checks to see if the given vdev could not be opened, in which case we post a
1357 * sysevent to notify the autoreplace code that the device has been removed.
1360 spa_check_removed(vdev_t
*vd
)
1364 for (c
= 0; c
< vd
->vdev_children
; c
++)
1365 spa_check_removed(vd
->vdev_child
[c
]);
1367 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_is_dead(vd
)) {
1368 zfs_ereport_post(FM_EREPORT_RESOURCE_AUTOREPLACE
,
1369 vd
->vdev_spa
, vd
, NULL
, 0, 0);
1370 spa_event_notify(vd
->vdev_spa
, vd
, FM_EREPORT_ZFS_DEVICE_CHECK
);
1375 * Validate the current config against the MOS config
1378 spa_config_valid(spa_t
*spa
, nvlist_t
*config
)
1380 vdev_t
*mrvd
, *rvd
= spa
->spa_root_vdev
;
1384 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nv
) == 0);
1386 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1387 VERIFY(spa_config_parse(spa
, &mrvd
, nv
, NULL
, 0, VDEV_ALLOC_LOAD
) == 0);
1389 ASSERT3U(rvd
->vdev_children
, ==, mrvd
->vdev_children
);
1392 * If we're doing a normal import, then build up any additional
1393 * diagnostic information about missing devices in this config.
1394 * We'll pass this up to the user for further processing.
1396 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
)) {
1397 nvlist_t
**child
, *nv
;
1400 child
= kmem_alloc(rvd
->vdev_children
* sizeof (nvlist_t
**),
1402 VERIFY(nvlist_alloc(&nv
, NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
1404 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1405 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1406 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1408 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1409 mtvd
->vdev_ops
!= &vdev_missing_ops
&&
1411 child
[idx
++] = vdev_config_generate(spa
, mtvd
,
1416 VERIFY(nvlist_add_nvlist_array(nv
,
1417 ZPOOL_CONFIG_CHILDREN
, child
, idx
) == 0);
1418 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
1419 ZPOOL_CONFIG_MISSING_DEVICES
, nv
) == 0);
1421 for (i
= 0; i
< idx
; i
++)
1422 nvlist_free(child
[i
]);
1425 kmem_free(child
, rvd
->vdev_children
* sizeof (char **));
1429 * Compare the root vdev tree with the information we have
1430 * from the MOS config (mrvd). Check each top-level vdev
1431 * with the corresponding MOS config top-level (mtvd).
1433 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1434 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1435 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1438 * Resolve any "missing" vdevs in the current configuration.
1439 * If we find that the MOS config has more accurate information
1440 * about the top-level vdev then use that vdev instead.
1442 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1443 mtvd
->vdev_ops
!= &vdev_missing_ops
) {
1445 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
))
1449 * Device specific actions.
1451 if (mtvd
->vdev_islog
) {
1452 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
1455 * XXX - once we have 'readonly' pool
1456 * support we should be able to handle
1457 * missing data devices by transitioning
1458 * the pool to readonly.
1464 * Swap the missing vdev with the data we were
1465 * able to obtain from the MOS config.
1467 vdev_remove_child(rvd
, tvd
);
1468 vdev_remove_child(mrvd
, mtvd
);
1470 vdev_add_child(rvd
, mtvd
);
1471 vdev_add_child(mrvd
, tvd
);
1473 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1475 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1478 } else if (mtvd
->vdev_islog
) {
1480 * Load the slog device's state from the MOS config
1481 * since it's possible that the label does not
1482 * contain the most up-to-date information.
1484 vdev_load_log_state(tvd
, mtvd
);
1489 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1492 * Ensure we were able to validate the config.
1494 return (rvd
->vdev_guid_sum
== spa
->spa_uberblock
.ub_guid_sum
);
1498 * Check for missing log devices
1501 spa_check_logs(spa_t
*spa
)
1503 switch (spa
->spa_log_state
) {
1506 case SPA_LOG_MISSING
:
1507 /* need to recheck in case slog has been restored */
1508 case SPA_LOG_UNKNOWN
:
1509 if (dmu_objset_find(spa
->spa_name
, zil_check_log_chain
, NULL
,
1510 DS_FIND_CHILDREN
)) {
1511 spa_set_log_state(spa
, SPA_LOG_MISSING
);
1520 spa_passivate_log(spa_t
*spa
)
1522 vdev_t
*rvd
= spa
->spa_root_vdev
;
1523 boolean_t slog_found
= B_FALSE
;
1526 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1528 if (!spa_has_slogs(spa
))
1531 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1532 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1533 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1535 if (tvd
->vdev_islog
) {
1536 metaslab_group_passivate(mg
);
1537 slog_found
= B_TRUE
;
1541 return (slog_found
);
1545 spa_activate_log(spa_t
*spa
)
1547 vdev_t
*rvd
= spa
->spa_root_vdev
;
1550 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1552 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1553 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1554 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1556 if (tvd
->vdev_islog
)
1557 metaslab_group_activate(mg
);
1562 spa_offline_log(spa_t
*spa
)
1566 if ((error
= dmu_objset_find(spa_name(spa
), zil_vdev_offline
,
1567 NULL
, DS_FIND_CHILDREN
)) == 0) {
1570 * We successfully offlined the log device, sync out the
1571 * current txg so that the "stubby" block can be removed
1574 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1580 spa_aux_check_removed(spa_aux_vdev_t
*sav
)
1584 for (i
= 0; i
< sav
->sav_count
; i
++)
1585 spa_check_removed(sav
->sav_vdevs
[i
]);
1589 spa_claim_notify(zio_t
*zio
)
1591 spa_t
*spa
= zio
->io_spa
;
1596 mutex_enter(&spa
->spa_props_lock
); /* any mutex will do */
1597 if (spa
->spa_claim_max_txg
< zio
->io_bp
->blk_birth
)
1598 spa
->spa_claim_max_txg
= zio
->io_bp
->blk_birth
;
1599 mutex_exit(&spa
->spa_props_lock
);
1602 typedef struct spa_load_error
{
1603 uint64_t sle_meta_count
;
1604 uint64_t sle_data_count
;
1608 spa_load_verify_done(zio_t
*zio
)
1610 blkptr_t
*bp
= zio
->io_bp
;
1611 spa_load_error_t
*sle
= zio
->io_private
;
1612 dmu_object_type_t type
= BP_GET_TYPE(bp
);
1613 int error
= zio
->io_error
;
1616 if ((BP_GET_LEVEL(bp
) != 0 || dmu_ot
[type
].ot_metadata
) &&
1617 type
!= DMU_OT_INTENT_LOG
)
1618 atomic_add_64(&sle
->sle_meta_count
, 1);
1620 atomic_add_64(&sle
->sle_data_count
, 1);
1622 zio_data_buf_free(zio
->io_data
, zio
->io_size
);
1627 spa_load_verify_cb(spa_t
*spa
, zilog_t
*zilog
, const blkptr_t
*bp
,
1628 arc_buf_t
*pbuf
, const zbookmark_t
*zb
, const dnode_phys_t
*dnp
, void *arg
)
1632 size_t size
= BP_GET_PSIZE(bp
);
1633 void *data
= zio_data_buf_alloc(size
);
1635 zio_nowait(zio_read(rio
, spa
, bp
, data
, size
,
1636 spa_load_verify_done
, rio
->io_private
, ZIO_PRIORITY_SCRUB
,
1637 ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_CANFAIL
|
1638 ZIO_FLAG_SCRUB
| ZIO_FLAG_RAW
, zb
));
1644 spa_load_verify(spa_t
*spa
)
1647 spa_load_error_t sle
= { 0 };
1648 zpool_rewind_policy_t policy
;
1649 boolean_t verify_ok
= B_FALSE
;
1652 zpool_get_rewind_policy(spa
->spa_config
, &policy
);
1654 if (policy
.zrp_request
& ZPOOL_NEVER_REWIND
)
1657 rio
= zio_root(spa
, NULL
, &sle
,
1658 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
);
1660 error
= traverse_pool(spa
, spa
->spa_verify_min_txg
,
1661 TRAVERSE_PRE
| TRAVERSE_PREFETCH
, spa_load_verify_cb
, rio
);
1663 (void) zio_wait(rio
);
1665 spa
->spa_load_meta_errors
= sle
.sle_meta_count
;
1666 spa
->spa_load_data_errors
= sle
.sle_data_count
;
1668 if (!error
&& sle
.sle_meta_count
<= policy
.zrp_maxmeta
&&
1669 sle
.sle_data_count
<= policy
.zrp_maxdata
) {
1673 spa
->spa_load_txg
= spa
->spa_uberblock
.ub_txg
;
1674 spa
->spa_load_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
1676 loss
= spa
->spa_last_ubsync_txg_ts
- spa
->spa_load_txg_ts
;
1677 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1678 ZPOOL_CONFIG_LOAD_TIME
, spa
->spa_load_txg_ts
) == 0);
1679 VERIFY(nvlist_add_int64(spa
->spa_load_info
,
1680 ZPOOL_CONFIG_REWIND_TIME
, loss
) == 0);
1681 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1682 ZPOOL_CONFIG_LOAD_DATA_ERRORS
, sle
.sle_data_count
) == 0);
1684 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
;
1688 if (error
!= ENXIO
&& error
!= EIO
)
1693 return (verify_ok
? 0 : EIO
);
1697 * Find a value in the pool props object.
1700 spa_prop_find(spa_t
*spa
, zpool_prop_t prop
, uint64_t *val
)
1702 (void) zap_lookup(spa
->spa_meta_objset
, spa
->spa_pool_props_object
,
1703 zpool_prop_to_name(prop
), sizeof (uint64_t), 1, val
);
1707 * Find a value in the pool directory object.
1710 spa_dir_prop(spa_t
*spa
, const char *name
, uint64_t *val
)
1712 return (zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
1713 name
, sizeof (uint64_t), 1, val
));
1717 spa_vdev_err(vdev_t
*vdev
, vdev_aux_t aux
, int err
)
1719 vdev_set_state(vdev
, B_TRUE
, VDEV_STATE_CANT_OPEN
, aux
);
1724 * Fix up config after a partly-completed split. This is done with the
1725 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
1726 * pool have that entry in their config, but only the splitting one contains
1727 * a list of all the guids of the vdevs that are being split off.
1729 * This function determines what to do with that list: either rejoin
1730 * all the disks to the pool, or complete the splitting process. To attempt
1731 * the rejoin, each disk that is offlined is marked online again, and
1732 * we do a reopen() call. If the vdev label for every disk that was
1733 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
1734 * then we call vdev_split() on each disk, and complete the split.
1736 * Otherwise we leave the config alone, with all the vdevs in place in
1737 * the original pool.
1740 spa_try_repair(spa_t
*spa
, nvlist_t
*config
)
1747 boolean_t attempt_reopen
;
1749 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
, &nvl
) != 0)
1752 /* check that the config is complete */
1753 if (nvlist_lookup_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
1754 &glist
, &gcount
) != 0)
1757 vd
= kmem_zalloc(gcount
* sizeof (vdev_t
*), KM_PUSHPAGE
);
1759 /* attempt to online all the vdevs & validate */
1760 attempt_reopen
= B_TRUE
;
1761 for (i
= 0; i
< gcount
; i
++) {
1762 if (glist
[i
] == 0) /* vdev is hole */
1765 vd
[i
] = spa_lookup_by_guid(spa
, glist
[i
], B_FALSE
);
1766 if (vd
[i
] == NULL
) {
1768 * Don't bother attempting to reopen the disks;
1769 * just do the split.
1771 attempt_reopen
= B_FALSE
;
1773 /* attempt to re-online it */
1774 vd
[i
]->vdev_offline
= B_FALSE
;
1778 if (attempt_reopen
) {
1779 vdev_reopen(spa
->spa_root_vdev
);
1781 /* check each device to see what state it's in */
1782 for (extracted
= 0, i
= 0; i
< gcount
; i
++) {
1783 if (vd
[i
] != NULL
&&
1784 vd
[i
]->vdev_stat
.vs_aux
!= VDEV_AUX_SPLIT_POOL
)
1791 * If every disk has been moved to the new pool, or if we never
1792 * even attempted to look at them, then we split them off for
1795 if (!attempt_reopen
|| gcount
== extracted
) {
1796 for (i
= 0; i
< gcount
; i
++)
1799 vdev_reopen(spa
->spa_root_vdev
);
1802 kmem_free(vd
, gcount
* sizeof (vdev_t
*));
1806 spa_load(spa_t
*spa
, spa_load_state_t state
, spa_import_type_t type
,
1807 boolean_t mosconfig
)
1809 nvlist_t
*config
= spa
->spa_config
;
1810 char *ereport
= FM_EREPORT_ZFS_POOL
;
1816 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
, &pool_guid
))
1819 ASSERT(spa
->spa_comment
== NULL
);
1820 if (nvlist_lookup_string(config
, ZPOOL_CONFIG_COMMENT
, &comment
) == 0)
1821 spa
->spa_comment
= spa_strdup(comment
);
1824 * Versioning wasn't explicitly added to the label until later, so if
1825 * it's not present treat it as the initial version.
1827 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VERSION
,
1828 &spa
->spa_ubsync
.ub_version
) != 0)
1829 spa
->spa_ubsync
.ub_version
= SPA_VERSION_INITIAL
;
1831 (void) nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
1832 &spa
->spa_config_txg
);
1834 if ((state
== SPA_LOAD_IMPORT
|| state
== SPA_LOAD_TRYIMPORT
) &&
1835 spa_guid_exists(pool_guid
, 0)) {
1838 spa
->spa_config_guid
= pool_guid
;
1840 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
,
1842 VERIFY(nvlist_dup(nvl
, &spa
->spa_config_splitting
,
1846 gethrestime(&spa
->spa_loaded_ts
);
1847 error
= spa_load_impl(spa
, pool_guid
, config
, state
, type
,
1848 mosconfig
, &ereport
);
1851 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
1853 if (error
!= EEXIST
) {
1854 spa
->spa_loaded_ts
.tv_sec
= 0;
1855 spa
->spa_loaded_ts
.tv_nsec
= 0;
1857 if (error
!= EBADF
) {
1858 zfs_ereport_post(ereport
, spa
, NULL
, NULL
, 0, 0);
1861 spa
->spa_load_state
= error
? SPA_LOAD_ERROR
: SPA_LOAD_NONE
;
1868 * Load an existing storage pool, using the pool's builtin spa_config as a
1869 * source of configuration information.
1871 __attribute__((always_inline
))
1873 spa_load_impl(spa_t
*spa
, uint64_t pool_guid
, nvlist_t
*config
,
1874 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
1878 nvlist_t
*nvroot
= NULL
;
1880 uberblock_t
*ub
= &spa
->spa_uberblock
;
1881 uint64_t children
, config_cache_txg
= spa
->spa_config_txg
;
1882 int orig_mode
= spa
->spa_mode
;
1887 * If this is an untrusted config, access the pool in read-only mode.
1888 * This prevents things like resilvering recently removed devices.
1891 spa
->spa_mode
= FREAD
;
1893 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1895 spa
->spa_load_state
= state
;
1897 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvroot
))
1900 parse
= (type
== SPA_IMPORT_EXISTING
?
1901 VDEV_ALLOC_LOAD
: VDEV_ALLOC_SPLIT
);
1904 * Create "The Godfather" zio to hold all async IOs
1906 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
1907 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
1910 * Parse the configuration into a vdev tree. We explicitly set the
1911 * value that will be returned by spa_version() since parsing the
1912 * configuration requires knowing the version number.
1914 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1915 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, parse
);
1916 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1921 ASSERT(spa
->spa_root_vdev
== rvd
);
1923 if (type
!= SPA_IMPORT_ASSEMBLE
) {
1924 ASSERT(spa_guid(spa
) == pool_guid
);
1928 * Try to open all vdevs, loading each label in the process.
1930 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1931 error
= vdev_open(rvd
);
1932 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1937 * We need to validate the vdev labels against the configuration that
1938 * we have in hand, which is dependent on the setting of mosconfig. If
1939 * mosconfig is true then we're validating the vdev labels based on
1940 * that config. Otherwise, we're validating against the cached config
1941 * (zpool.cache) that was read when we loaded the zfs module, and then
1942 * later we will recursively call spa_load() and validate against
1945 * If we're assembling a new pool that's been split off from an
1946 * existing pool, the labels haven't yet been updated so we skip
1947 * validation for now.
1949 if (type
!= SPA_IMPORT_ASSEMBLE
) {
1950 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1951 error
= vdev_validate(rvd
, mosconfig
);
1952 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1957 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
1962 * Find the best uberblock.
1964 vdev_uberblock_load(NULL
, rvd
, ub
);
1967 * If we weren't able to find a single valid uberblock, return failure.
1969 if (ub
->ub_txg
== 0)
1970 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, ENXIO
));
1973 * If the pool is newer than the code, we can't open it.
1975 if (ub
->ub_version
> SPA_VERSION
)
1976 return (spa_vdev_err(rvd
, VDEV_AUX_VERSION_NEWER
, ENOTSUP
));
1979 * If the vdev guid sum doesn't match the uberblock, we have an
1980 * incomplete configuration. We first check to see if the pool
1981 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
1982 * If it is, defer the vdev_guid_sum check till later so we
1983 * can handle missing vdevs.
1985 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VDEV_CHILDREN
,
1986 &children
) != 0 && mosconfig
&& type
!= SPA_IMPORT_ASSEMBLE
&&
1987 rvd
->vdev_guid_sum
!= ub
->ub_guid_sum
)
1988 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
, ENXIO
));
1990 if (type
!= SPA_IMPORT_ASSEMBLE
&& spa
->spa_config_splitting
) {
1991 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1992 spa_try_repair(spa
, config
);
1993 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1994 nvlist_free(spa
->spa_config_splitting
);
1995 spa
->spa_config_splitting
= NULL
;
1999 * Initialize internal SPA structures.
2001 spa
->spa_state
= POOL_STATE_ACTIVE
;
2002 spa
->spa_ubsync
= spa
->spa_uberblock
;
2003 spa
->spa_verify_min_txg
= spa
->spa_extreme_rewind
?
2004 TXG_INITIAL
- 1 : spa_last_synced_txg(spa
) - TXG_DEFER_SIZE
- 1;
2005 spa
->spa_first_txg
= spa
->spa_last_ubsync_txg
?
2006 spa
->spa_last_ubsync_txg
: spa_last_synced_txg(spa
) + 1;
2007 spa
->spa_claim_max_txg
= spa
->spa_first_txg
;
2008 spa
->spa_prev_software_version
= ub
->ub_software_version
;
2010 error
= dsl_pool_open(spa
, spa
->spa_first_txg
, &spa
->spa_dsl_pool
);
2012 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2013 spa
->spa_meta_objset
= spa
->spa_dsl_pool
->dp_meta_objset
;
2015 if (spa_dir_prop(spa
, DMU_POOL_CONFIG
, &spa
->spa_config_object
) != 0)
2016 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2020 nvlist_t
*policy
= NULL
, *nvconfig
;
2022 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2023 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2025 if (!spa_is_root(spa
) && nvlist_lookup_uint64(nvconfig
,
2026 ZPOOL_CONFIG_HOSTID
, &hostid
) == 0) {
2028 unsigned long myhostid
= 0;
2030 VERIFY(nvlist_lookup_string(nvconfig
,
2031 ZPOOL_CONFIG_HOSTNAME
, &hostname
) == 0);
2034 myhostid
= zone_get_hostid(NULL
);
2037 * We're emulating the system's hostid in userland, so
2038 * we can't use zone_get_hostid().
2040 (void) ddi_strtoul(hw_serial
, NULL
, 10, &myhostid
);
2041 #endif /* _KERNEL */
2042 if (hostid
!= 0 && myhostid
!= 0 &&
2043 hostid
!= myhostid
) {
2044 nvlist_free(nvconfig
);
2045 cmn_err(CE_WARN
, "pool '%s' could not be "
2046 "loaded as it was last accessed by "
2047 "another system (host: %s hostid: 0x%lx). "
2048 "See: http://zfsonlinux.org/msg/ZFS-8000-EY",
2049 spa_name(spa
), hostname
,
2050 (unsigned long)hostid
);
2054 if (nvlist_lookup_nvlist(spa
->spa_config
,
2055 ZPOOL_REWIND_POLICY
, &policy
) == 0)
2056 VERIFY(nvlist_add_nvlist(nvconfig
,
2057 ZPOOL_REWIND_POLICY
, policy
) == 0);
2059 spa_config_set(spa
, nvconfig
);
2061 spa_deactivate(spa
);
2062 spa_activate(spa
, orig_mode
);
2064 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, B_TRUE
));
2067 if (spa_dir_prop(spa
, DMU_POOL_SYNC_BPOBJ
, &obj
) != 0)
2068 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2069 error
= bpobj_open(&spa
->spa_deferred_bpobj
, spa
->spa_meta_objset
, obj
);
2071 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2074 * Load the bit that tells us to use the new accounting function
2075 * (raid-z deflation). If we have an older pool, this will not
2078 error
= spa_dir_prop(spa
, DMU_POOL_DEFLATE
, &spa
->spa_deflate
);
2079 if (error
!= 0 && error
!= ENOENT
)
2080 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2082 error
= spa_dir_prop(spa
, DMU_POOL_CREATION_VERSION
,
2083 &spa
->spa_creation_version
);
2084 if (error
!= 0 && error
!= ENOENT
)
2085 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2088 * Load the persistent error log. If we have an older pool, this will
2091 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_LAST
, &spa
->spa_errlog_last
);
2092 if (error
!= 0 && error
!= ENOENT
)
2093 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2095 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_SCRUB
,
2096 &spa
->spa_errlog_scrub
);
2097 if (error
!= 0 && error
!= ENOENT
)
2098 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2101 * Load the history object. If we have an older pool, this
2102 * will not be present.
2104 error
= spa_dir_prop(spa
, DMU_POOL_HISTORY
, &spa
->spa_history
);
2105 if (error
!= 0 && error
!= ENOENT
)
2106 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2109 * If we're assembling the pool from the split-off vdevs of
2110 * an existing pool, we don't want to attach the spares & cache
2115 * Load any hot spares for this pool.
2117 error
= spa_dir_prop(spa
, DMU_POOL_SPARES
, &spa
->spa_spares
.sav_object
);
2118 if (error
!= 0 && error
!= ENOENT
)
2119 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2120 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2121 ASSERT(spa_version(spa
) >= SPA_VERSION_SPARES
);
2122 if (load_nvlist(spa
, spa
->spa_spares
.sav_object
,
2123 &spa
->spa_spares
.sav_config
) != 0)
2124 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2126 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2127 spa_load_spares(spa
);
2128 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2129 } else if (error
== 0) {
2130 spa
->spa_spares
.sav_sync
= B_TRUE
;
2134 * Load any level 2 ARC devices for this pool.
2136 error
= spa_dir_prop(spa
, DMU_POOL_L2CACHE
,
2137 &spa
->spa_l2cache
.sav_object
);
2138 if (error
!= 0 && error
!= ENOENT
)
2139 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2140 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2141 ASSERT(spa_version(spa
) >= SPA_VERSION_L2CACHE
);
2142 if (load_nvlist(spa
, spa
->spa_l2cache
.sav_object
,
2143 &spa
->spa_l2cache
.sav_config
) != 0)
2144 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2146 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2147 spa_load_l2cache(spa
);
2148 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2149 } else if (error
== 0) {
2150 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
2153 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
2155 error
= spa_dir_prop(spa
, DMU_POOL_PROPS
, &spa
->spa_pool_props_object
);
2156 if (error
&& error
!= ENOENT
)
2157 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2160 uint64_t autoreplace
;
2162 spa_prop_find(spa
, ZPOOL_PROP_BOOTFS
, &spa
->spa_bootfs
);
2163 spa_prop_find(spa
, ZPOOL_PROP_AUTOREPLACE
, &autoreplace
);
2164 spa_prop_find(spa
, ZPOOL_PROP_DELEGATION
, &spa
->spa_delegation
);
2165 spa_prop_find(spa
, ZPOOL_PROP_FAILUREMODE
, &spa
->spa_failmode
);
2166 spa_prop_find(spa
, ZPOOL_PROP_AUTOEXPAND
, &spa
->spa_autoexpand
);
2167 spa_prop_find(spa
, ZPOOL_PROP_DEDUPDITTO
,
2168 &spa
->spa_dedup_ditto
);
2170 spa
->spa_autoreplace
= (autoreplace
!= 0);
2174 * If the 'autoreplace' property is set, then post a resource notifying
2175 * the ZFS DE that it should not issue any faults for unopenable
2176 * devices. We also iterate over the vdevs, and post a sysevent for any
2177 * unopenable vdevs so that the normal autoreplace handler can take
2180 if (spa
->spa_autoreplace
&& state
!= SPA_LOAD_TRYIMPORT
) {
2181 spa_check_removed(spa
->spa_root_vdev
);
2183 * For the import case, this is done in spa_import(), because
2184 * at this point we're using the spare definitions from
2185 * the MOS config, not necessarily from the userland config.
2187 if (state
!= SPA_LOAD_IMPORT
) {
2188 spa_aux_check_removed(&spa
->spa_spares
);
2189 spa_aux_check_removed(&spa
->spa_l2cache
);
2194 * Load the vdev state for all toplevel vdevs.
2199 * Propagate the leaf DTLs we just loaded all the way up the tree.
2201 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2202 vdev_dtl_reassess(rvd
, 0, 0, B_FALSE
);
2203 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2206 * Load the DDTs (dedup tables).
2208 error
= ddt_load(spa
);
2210 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2212 spa_update_dspace(spa
);
2215 * Validate the config, using the MOS config to fill in any
2216 * information which might be missing. If we fail to validate
2217 * the config then declare the pool unfit for use. If we're
2218 * assembling a pool from a split, the log is not transferred
2221 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2224 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2225 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2227 if (!spa_config_valid(spa
, nvconfig
)) {
2228 nvlist_free(nvconfig
);
2229 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
,
2232 nvlist_free(nvconfig
);
2235 * Now that we've validate the config, check the state of the
2236 * root vdev. If it can't be opened, it indicates one or
2237 * more toplevel vdevs are faulted.
2239 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2242 if (spa_check_logs(spa
)) {
2243 *ereport
= FM_EREPORT_ZFS_LOG_REPLAY
;
2244 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_LOG
, ENXIO
));
2249 * We've successfully opened the pool, verify that we're ready
2250 * to start pushing transactions.
2252 if (state
!= SPA_LOAD_TRYIMPORT
) {
2253 if ((error
= spa_load_verify(spa
)))
2254 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2258 if (spa_writeable(spa
) && (state
== SPA_LOAD_RECOVER
||
2259 spa
->spa_load_max_txg
== UINT64_MAX
)) {
2261 int need_update
= B_FALSE
;
2264 ASSERT(state
!= SPA_LOAD_TRYIMPORT
);
2267 * Claim log blocks that haven't been committed yet.
2268 * This must all happen in a single txg.
2269 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2270 * invoked from zil_claim_log_block()'s i/o done callback.
2271 * Price of rollback is that we abandon the log.
2273 spa
->spa_claiming
= B_TRUE
;
2275 tx
= dmu_tx_create_assigned(spa_get_dsl(spa
),
2276 spa_first_txg(spa
));
2277 (void) dmu_objset_find(spa_name(spa
),
2278 zil_claim
, tx
, DS_FIND_CHILDREN
);
2281 spa
->spa_claiming
= B_FALSE
;
2283 spa_set_log_state(spa
, SPA_LOG_GOOD
);
2284 spa
->spa_sync_on
= B_TRUE
;
2285 txg_sync_start(spa
->spa_dsl_pool
);
2288 * Wait for all claims to sync. We sync up to the highest
2289 * claimed log block birth time so that claimed log blocks
2290 * don't appear to be from the future. spa_claim_max_txg
2291 * will have been set for us by either zil_check_log_chain()
2292 * (invoked from spa_check_logs()) or zil_claim() above.
2294 txg_wait_synced(spa
->spa_dsl_pool
, spa
->spa_claim_max_txg
);
2297 * If the config cache is stale, or we have uninitialized
2298 * metaslabs (see spa_vdev_add()), then update the config.
2300 * If this is a verbatim import, trust the current
2301 * in-core spa_config and update the disk labels.
2303 if (config_cache_txg
!= spa
->spa_config_txg
||
2304 state
== SPA_LOAD_IMPORT
||
2305 state
== SPA_LOAD_RECOVER
||
2306 (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
))
2307 need_update
= B_TRUE
;
2309 for (c
= 0; c
< rvd
->vdev_children
; c
++)
2310 if (rvd
->vdev_child
[c
]->vdev_ms_array
== 0)
2311 need_update
= B_TRUE
;
2314 * Update the config cache asychronously in case we're the
2315 * root pool, in which case the config cache isn't writable yet.
2318 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
2321 * Check all DTLs to see if anything needs resilvering.
2323 if (!dsl_scan_resilvering(spa
->spa_dsl_pool
) &&
2324 vdev_resilver_needed(rvd
, NULL
, NULL
))
2325 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
2328 * Delete any inconsistent datasets.
2330 (void) dmu_objset_find(spa_name(spa
),
2331 dsl_destroy_inconsistent
, NULL
, DS_FIND_CHILDREN
);
2334 * Clean up any stale temporary dataset userrefs.
2336 dsl_pool_clean_tmp_userrefs(spa
->spa_dsl_pool
);
2343 spa_load_retry(spa_t
*spa
, spa_load_state_t state
, int mosconfig
)
2345 int mode
= spa
->spa_mode
;
2348 spa_deactivate(spa
);
2350 spa
->spa_load_max_txg
--;
2352 spa_activate(spa
, mode
);
2353 spa_async_suspend(spa
);
2355 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, mosconfig
));
2359 spa_load_best(spa_t
*spa
, spa_load_state_t state
, int mosconfig
,
2360 uint64_t max_request
, int rewind_flags
)
2362 nvlist_t
*config
= NULL
;
2363 int load_error
, rewind_error
;
2364 uint64_t safe_rewind_txg
;
2367 if (spa
->spa_load_txg
&& state
== SPA_LOAD_RECOVER
) {
2368 spa
->spa_load_max_txg
= spa
->spa_load_txg
;
2369 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2371 spa
->spa_load_max_txg
= max_request
;
2374 load_error
= rewind_error
= spa_load(spa
, state
, SPA_IMPORT_EXISTING
,
2376 if (load_error
== 0)
2379 if (spa
->spa_root_vdev
!= NULL
)
2380 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2382 spa
->spa_last_ubsync_txg
= spa
->spa_uberblock
.ub_txg
;
2383 spa
->spa_last_ubsync_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
2385 if (rewind_flags
& ZPOOL_NEVER_REWIND
) {
2386 nvlist_free(config
);
2387 return (load_error
);
2390 /* Price of rolling back is discarding txgs, including log */
2391 if (state
== SPA_LOAD_RECOVER
)
2392 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2394 spa
->spa_load_max_txg
= spa
->spa_last_ubsync_txg
;
2395 safe_rewind_txg
= spa
->spa_last_ubsync_txg
- TXG_DEFER_SIZE
;
2396 min_txg
= (rewind_flags
& ZPOOL_EXTREME_REWIND
) ?
2397 TXG_INITIAL
: safe_rewind_txg
;
2400 * Continue as long as we're finding errors, we're still within
2401 * the acceptable rewind range, and we're still finding uberblocks
2403 while (rewind_error
&& spa
->spa_uberblock
.ub_txg
>= min_txg
&&
2404 spa
->spa_uberblock
.ub_txg
<= spa
->spa_load_max_txg
) {
2405 if (spa
->spa_load_max_txg
< safe_rewind_txg
)
2406 spa
->spa_extreme_rewind
= B_TRUE
;
2407 rewind_error
= spa_load_retry(spa
, state
, mosconfig
);
2410 spa
->spa_extreme_rewind
= B_FALSE
;
2411 spa
->spa_load_max_txg
= UINT64_MAX
;
2413 if (config
&& (rewind_error
|| state
!= SPA_LOAD_RECOVER
))
2414 spa_config_set(spa
, config
);
2416 return (state
== SPA_LOAD_RECOVER
? rewind_error
: load_error
);
2422 * The import case is identical to an open except that the configuration is sent
2423 * down from userland, instead of grabbed from the configuration cache. For the
2424 * case of an open, the pool configuration will exist in the
2425 * POOL_STATE_UNINITIALIZED state.
2427 * The stats information (gen/count/ustats) is used to gather vdev statistics at
2428 * the same time open the pool, without having to keep around the spa_t in some
2432 spa_open_common(const char *pool
, spa_t
**spapp
, void *tag
, nvlist_t
*nvpolicy
,
2436 spa_load_state_t state
= SPA_LOAD_OPEN
;
2438 int locked
= B_FALSE
;
2443 * As disgusting as this is, we need to support recursive calls to this
2444 * function because dsl_dir_open() is called during spa_load(), and ends
2445 * up calling spa_open() again. The real fix is to figure out how to
2446 * avoid dsl_dir_open() calling this in the first place.
2448 if (mutex_owner(&spa_namespace_lock
) != curthread
) {
2449 mutex_enter(&spa_namespace_lock
);
2453 if ((spa
= spa_lookup(pool
)) == NULL
) {
2455 mutex_exit(&spa_namespace_lock
);
2459 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
) {
2460 zpool_rewind_policy_t policy
;
2462 zpool_get_rewind_policy(nvpolicy
? nvpolicy
: spa
->spa_config
,
2464 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
2465 state
= SPA_LOAD_RECOVER
;
2467 spa_activate(spa
, spa_mode_global
);
2469 if (state
!= SPA_LOAD_RECOVER
)
2470 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
2472 error
= spa_load_best(spa
, state
, B_FALSE
, policy
.zrp_txg
,
2473 policy
.zrp_request
);
2475 if (error
== EBADF
) {
2477 * If vdev_validate() returns failure (indicated by
2478 * EBADF), it indicates that one of the vdevs indicates
2479 * that the pool has been exported or destroyed. If
2480 * this is the case, the config cache is out of sync and
2481 * we should remove the pool from the namespace.
2484 spa_deactivate(spa
);
2485 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
2488 mutex_exit(&spa_namespace_lock
);
2494 * We can't open the pool, but we still have useful
2495 * information: the state of each vdev after the
2496 * attempted vdev_open(). Return this to the user.
2498 if (config
!= NULL
&& spa
->spa_config
) {
2499 VERIFY(nvlist_dup(spa
->spa_config
, config
,
2501 VERIFY(nvlist_add_nvlist(*config
,
2502 ZPOOL_CONFIG_LOAD_INFO
,
2503 spa
->spa_load_info
) == 0);
2506 spa_deactivate(spa
);
2507 spa
->spa_last_open_failed
= error
;
2509 mutex_exit(&spa_namespace_lock
);
2515 spa_open_ref(spa
, tag
);
2518 *config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2521 * If we've recovered the pool, pass back any information we
2522 * gathered while doing the load.
2524 if (state
== SPA_LOAD_RECOVER
) {
2525 VERIFY(nvlist_add_nvlist(*config
, ZPOOL_CONFIG_LOAD_INFO
,
2526 spa
->spa_load_info
) == 0);
2530 spa
->spa_last_open_failed
= 0;
2531 spa
->spa_last_ubsync_txg
= 0;
2532 spa
->spa_load_txg
= 0;
2533 mutex_exit(&spa_namespace_lock
);
2542 spa_open_rewind(const char *name
, spa_t
**spapp
, void *tag
, nvlist_t
*policy
,
2545 return (spa_open_common(name
, spapp
, tag
, policy
, config
));
2549 spa_open(const char *name
, spa_t
**spapp
, void *tag
)
2551 return (spa_open_common(name
, spapp
, tag
, NULL
, NULL
));
2555 * Lookup the given spa_t, incrementing the inject count in the process,
2556 * preventing it from being exported or destroyed.
2559 spa_inject_addref(char *name
)
2563 mutex_enter(&spa_namespace_lock
);
2564 if ((spa
= spa_lookup(name
)) == NULL
) {
2565 mutex_exit(&spa_namespace_lock
);
2568 spa
->spa_inject_ref
++;
2569 mutex_exit(&spa_namespace_lock
);
2575 spa_inject_delref(spa_t
*spa
)
2577 mutex_enter(&spa_namespace_lock
);
2578 spa
->spa_inject_ref
--;
2579 mutex_exit(&spa_namespace_lock
);
2583 * Add spares device information to the nvlist.
2586 spa_add_spares(spa_t
*spa
, nvlist_t
*config
)
2596 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2598 if (spa
->spa_spares
.sav_count
== 0)
2601 VERIFY(nvlist_lookup_nvlist(config
,
2602 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2603 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
2604 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2606 VERIFY(nvlist_add_nvlist_array(nvroot
,
2607 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
2608 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2609 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2612 * Go through and find any spares which have since been
2613 * repurposed as an active spare. If this is the case, update
2614 * their status appropriately.
2616 for (i
= 0; i
< nspares
; i
++) {
2617 VERIFY(nvlist_lookup_uint64(spares
[i
],
2618 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2619 if (spa_spare_exists(guid
, &pool
, NULL
) &&
2621 VERIFY(nvlist_lookup_uint64_array(
2622 spares
[i
], ZPOOL_CONFIG_VDEV_STATS
,
2623 (uint64_t **)&vs
, &vsc
) == 0);
2624 vs
->vs_state
= VDEV_STATE_CANT_OPEN
;
2625 vs
->vs_aux
= VDEV_AUX_SPARED
;
2632 * Add l2cache device information to the nvlist, including vdev stats.
2635 spa_add_l2cache(spa_t
*spa
, nvlist_t
*config
)
2638 uint_t i
, j
, nl2cache
;
2645 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2647 if (spa
->spa_l2cache
.sav_count
== 0)
2650 VERIFY(nvlist_lookup_nvlist(config
,
2651 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2652 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
2653 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2654 if (nl2cache
!= 0) {
2655 VERIFY(nvlist_add_nvlist_array(nvroot
,
2656 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
2657 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2658 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2661 * Update level 2 cache device stats.
2664 for (i
= 0; i
< nl2cache
; i
++) {
2665 VERIFY(nvlist_lookup_uint64(l2cache
[i
],
2666 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2669 for (j
= 0; j
< spa
->spa_l2cache
.sav_count
; j
++) {
2671 spa
->spa_l2cache
.sav_vdevs
[j
]->vdev_guid
) {
2672 vd
= spa
->spa_l2cache
.sav_vdevs
[j
];
2678 VERIFY(nvlist_lookup_uint64_array(l2cache
[i
],
2679 ZPOOL_CONFIG_VDEV_STATS
, (uint64_t **)&vs
, &vsc
)
2681 vdev_get_stats(vd
, vs
);
2687 spa_get_stats(const char *name
, nvlist_t
**config
, char *altroot
, size_t buflen
)
2693 error
= spa_open_common(name
, &spa
, FTAG
, NULL
, config
);
2697 * This still leaves a window of inconsistency where the spares
2698 * or l2cache devices could change and the config would be
2699 * self-inconsistent.
2701 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
2703 if (*config
!= NULL
) {
2704 uint64_t loadtimes
[2];
2706 loadtimes
[0] = spa
->spa_loaded_ts
.tv_sec
;
2707 loadtimes
[1] = spa
->spa_loaded_ts
.tv_nsec
;
2708 VERIFY(nvlist_add_uint64_array(*config
,
2709 ZPOOL_CONFIG_LOADED_TIME
, loadtimes
, 2) == 0);
2711 VERIFY(nvlist_add_uint64(*config
,
2712 ZPOOL_CONFIG_ERRCOUNT
,
2713 spa_get_errlog_size(spa
)) == 0);
2715 if (spa_suspended(spa
))
2716 VERIFY(nvlist_add_uint64(*config
,
2717 ZPOOL_CONFIG_SUSPENDED
,
2718 spa
->spa_failmode
) == 0);
2720 spa_add_spares(spa
, *config
);
2721 spa_add_l2cache(spa
, *config
);
2726 * We want to get the alternate root even for faulted pools, so we cheat
2727 * and call spa_lookup() directly.
2731 mutex_enter(&spa_namespace_lock
);
2732 spa
= spa_lookup(name
);
2734 spa_altroot(spa
, altroot
, buflen
);
2738 mutex_exit(&spa_namespace_lock
);
2740 spa_altroot(spa
, altroot
, buflen
);
2745 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
2746 spa_close(spa
, FTAG
);
2753 * Validate that the auxiliary device array is well formed. We must have an
2754 * array of nvlists, each which describes a valid leaf vdev. If this is an
2755 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
2756 * specified, as long as they are well-formed.
2759 spa_validate_aux_devs(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
,
2760 spa_aux_vdev_t
*sav
, const char *config
, uint64_t version
,
2761 vdev_labeltype_t label
)
2768 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
2771 * It's acceptable to have no devs specified.
2773 if (nvlist_lookup_nvlist_array(nvroot
, config
, &dev
, &ndev
) != 0)
2780 * Make sure the pool is formatted with a version that supports this
2783 if (spa_version(spa
) < version
)
2787 * Set the pending device list so we correctly handle device in-use
2790 sav
->sav_pending
= dev
;
2791 sav
->sav_npending
= ndev
;
2793 for (i
= 0; i
< ndev
; i
++) {
2794 if ((error
= spa_config_parse(spa
, &vd
, dev
[i
], NULL
, 0,
2798 if (!vd
->vdev_ops
->vdev_op_leaf
) {
2805 * The L2ARC currently only supports disk devices in
2806 * kernel context. For user-level testing, we allow it.
2809 if ((strcmp(config
, ZPOOL_CONFIG_L2CACHE
) == 0) &&
2810 strcmp(vd
->vdev_ops
->vdev_op_type
, VDEV_TYPE_DISK
) != 0) {
2818 if ((error
= vdev_open(vd
)) == 0 &&
2819 (error
= vdev_label_init(vd
, crtxg
, label
)) == 0) {
2820 VERIFY(nvlist_add_uint64(dev
[i
], ZPOOL_CONFIG_GUID
,
2821 vd
->vdev_guid
) == 0);
2827 (mode
!= VDEV_ALLOC_SPARE
&& mode
!= VDEV_ALLOC_L2CACHE
))
2834 sav
->sav_pending
= NULL
;
2835 sav
->sav_npending
= 0;
2840 spa_validate_aux(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
)
2844 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
2846 if ((error
= spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
2847 &spa
->spa_spares
, ZPOOL_CONFIG_SPARES
, SPA_VERSION_SPARES
,
2848 VDEV_LABEL_SPARE
)) != 0) {
2852 return (spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
2853 &spa
->spa_l2cache
, ZPOOL_CONFIG_L2CACHE
, SPA_VERSION_L2CACHE
,
2854 VDEV_LABEL_L2CACHE
));
2858 spa_set_aux_vdevs(spa_aux_vdev_t
*sav
, nvlist_t
**devs
, int ndevs
,
2863 if (sav
->sav_config
!= NULL
) {
2869 * Generate new dev list by concatentating with the
2872 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
, config
,
2873 &olddevs
, &oldndevs
) == 0);
2875 newdevs
= kmem_alloc(sizeof (void *) *
2876 (ndevs
+ oldndevs
), KM_PUSHPAGE
);
2877 for (i
= 0; i
< oldndevs
; i
++)
2878 VERIFY(nvlist_dup(olddevs
[i
], &newdevs
[i
],
2880 for (i
= 0; i
< ndevs
; i
++)
2881 VERIFY(nvlist_dup(devs
[i
], &newdevs
[i
+ oldndevs
],
2884 VERIFY(nvlist_remove(sav
->sav_config
, config
,
2885 DATA_TYPE_NVLIST_ARRAY
) == 0);
2887 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
2888 config
, newdevs
, ndevs
+ oldndevs
) == 0);
2889 for (i
= 0; i
< oldndevs
+ ndevs
; i
++)
2890 nvlist_free(newdevs
[i
]);
2891 kmem_free(newdevs
, (oldndevs
+ ndevs
) * sizeof (void *));
2894 * Generate a new dev list.
2896 VERIFY(nvlist_alloc(&sav
->sav_config
, NV_UNIQUE_NAME
,
2898 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
, config
,
2904 * Stop and drop level 2 ARC devices
2907 spa_l2cache_drop(spa_t
*spa
)
2911 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
2913 for (i
= 0; i
< sav
->sav_count
; i
++) {
2916 vd
= sav
->sav_vdevs
[i
];
2919 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
2920 pool
!= 0ULL && l2arc_vdev_present(vd
))
2921 l2arc_remove_vdev(vd
);
2929 spa_create(const char *pool
, nvlist_t
*nvroot
, nvlist_t
*props
,
2930 const char *history_str
, nvlist_t
*zplprops
)
2933 char *altroot
= NULL
;
2938 uint64_t txg
= TXG_INITIAL
;
2939 nvlist_t
**spares
, **l2cache
;
2940 uint_t nspares
, nl2cache
;
2941 uint64_t version
, obj
;
2945 * If this pool already exists, return failure.
2947 mutex_enter(&spa_namespace_lock
);
2948 if (spa_lookup(pool
) != NULL
) {
2949 mutex_exit(&spa_namespace_lock
);
2954 * Allocate a new spa_t structure.
2956 (void) nvlist_lookup_string(props
,
2957 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
2958 spa
= spa_add(pool
, NULL
, altroot
);
2959 spa_activate(spa
, spa_mode_global
);
2961 if (props
&& (error
= spa_prop_validate(spa
, props
))) {
2962 spa_deactivate(spa
);
2964 mutex_exit(&spa_namespace_lock
);
2968 if (nvlist_lookup_uint64(props
, zpool_prop_to_name(ZPOOL_PROP_VERSION
),
2970 version
= SPA_VERSION
;
2971 ASSERT(version
<= SPA_VERSION
);
2973 spa
->spa_first_txg
= txg
;
2974 spa
->spa_uberblock
.ub_txg
= txg
- 1;
2975 spa
->spa_uberblock
.ub_version
= version
;
2976 spa
->spa_ubsync
= spa
->spa_uberblock
;
2979 * Create "The Godfather" zio to hold all async IOs
2981 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
2982 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
2985 * Create the root vdev.
2987 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2989 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, VDEV_ALLOC_ADD
);
2991 ASSERT(error
!= 0 || rvd
!= NULL
);
2992 ASSERT(error
!= 0 || spa
->spa_root_vdev
== rvd
);
2994 if (error
== 0 && !zfs_allocatable_devs(nvroot
))
2998 (error
= vdev_create(rvd
, txg
, B_FALSE
)) == 0 &&
2999 (error
= spa_validate_aux(spa
, nvroot
, txg
,
3000 VDEV_ALLOC_ADD
)) == 0) {
3001 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
3002 vdev_metaslab_set_size(rvd
->vdev_child
[c
]);
3003 vdev_expand(rvd
->vdev_child
[c
], txg
);
3007 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3011 spa_deactivate(spa
);
3013 mutex_exit(&spa_namespace_lock
);
3018 * Get the list of spares, if specified.
3020 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3021 &spares
, &nspares
) == 0) {
3022 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
, NV_UNIQUE_NAME
,
3024 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3025 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3026 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3027 spa_load_spares(spa
);
3028 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3029 spa
->spa_spares
.sav_sync
= B_TRUE
;
3033 * Get the list of level 2 cache devices, if specified.
3035 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3036 &l2cache
, &nl2cache
) == 0) {
3037 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3038 NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
3039 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3040 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3041 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3042 spa_load_l2cache(spa
);
3043 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3044 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3047 spa
->spa_dsl_pool
= dp
= dsl_pool_create(spa
, zplprops
, txg
);
3048 spa
->spa_meta_objset
= dp
->dp_meta_objset
;
3051 * Create DDTs (dedup tables).
3055 spa_update_dspace(spa
);
3057 tx
= dmu_tx_create_assigned(dp
, txg
);
3060 * Create the pool config object.
3062 spa
->spa_config_object
= dmu_object_alloc(spa
->spa_meta_objset
,
3063 DMU_OT_PACKED_NVLIST
, SPA_CONFIG_BLOCKSIZE
,
3064 DMU_OT_PACKED_NVLIST_SIZE
, sizeof (uint64_t), tx
);
3066 if (zap_add(spa
->spa_meta_objset
,
3067 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CONFIG
,
3068 sizeof (uint64_t), 1, &spa
->spa_config_object
, tx
) != 0) {
3069 cmn_err(CE_PANIC
, "failed to add pool config");
3072 if (zap_add(spa
->spa_meta_objset
,
3073 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CREATION_VERSION
,
3074 sizeof (uint64_t), 1, &version
, tx
) != 0) {
3075 cmn_err(CE_PANIC
, "failed to add pool version");
3078 /* Newly created pools with the right version are always deflated. */
3079 if (version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
3080 spa
->spa_deflate
= TRUE
;
3081 if (zap_add(spa
->spa_meta_objset
,
3082 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
3083 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
) != 0) {
3084 cmn_err(CE_PANIC
, "failed to add deflate");
3089 * Create the deferred-free bpobj. Turn off compression
3090 * because sync-to-convergence takes longer if the blocksize
3093 obj
= bpobj_alloc(spa
->spa_meta_objset
, 1 << 14, tx
);
3094 dmu_object_set_compress(spa
->spa_meta_objset
, obj
,
3095 ZIO_COMPRESS_OFF
, tx
);
3096 if (zap_add(spa
->spa_meta_objset
,
3097 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_SYNC_BPOBJ
,
3098 sizeof (uint64_t), 1, &obj
, tx
) != 0) {
3099 cmn_err(CE_PANIC
, "failed to add bpobj");
3101 VERIFY3U(0, ==, bpobj_open(&spa
->spa_deferred_bpobj
,
3102 spa
->spa_meta_objset
, obj
));
3105 * Create the pool's history object.
3107 if (version
>= SPA_VERSION_ZPOOL_HISTORY
)
3108 spa_history_create_obj(spa
, tx
);
3111 * Set pool properties.
3113 spa
->spa_bootfs
= zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS
);
3114 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
3115 spa
->spa_failmode
= zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE
);
3116 spa
->spa_autoexpand
= zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND
);
3118 if (props
!= NULL
) {
3119 spa_configfile_set(spa
, props
, B_FALSE
);
3120 spa_sync_props(spa
, props
, tx
);
3125 spa
->spa_sync_on
= B_TRUE
;
3126 txg_sync_start(spa
->spa_dsl_pool
);
3129 * We explicitly wait for the first transaction to complete so that our
3130 * bean counters are appropriately updated.
3132 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
3134 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3136 if (version
>= SPA_VERSION_ZPOOL_HISTORY
&& history_str
!= NULL
)
3137 (void) spa_history_log(spa
, history_str
, LOG_CMD_POOL_CREATE
);
3138 spa_history_log_version(spa
, LOG_POOL_CREATE
);
3140 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
3142 mutex_exit(&spa_namespace_lock
);
3149 * Get the root pool information from the root disk, then import the root pool
3150 * during the system boot up time.
3152 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t
**);
3155 spa_generate_rootconf(char *devpath
, char *devid
, uint64_t *guid
)
3158 nvlist_t
*nvtop
, *nvroot
;
3161 if (vdev_disk_read_rootlabel(devpath
, devid
, &config
) != 0)
3165 * Add this top-level vdev to the child array.
3167 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3169 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
3171 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_GUID
, guid
) == 0);
3174 * Put this pool's top-level vdevs into a root vdev.
3176 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
3177 VERIFY(nvlist_add_string(nvroot
, ZPOOL_CONFIG_TYPE
,
3178 VDEV_TYPE_ROOT
) == 0);
3179 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_ID
, 0ULL) == 0);
3180 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_GUID
, pgid
) == 0);
3181 VERIFY(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
3185 * Replace the existing vdev_tree with the new root vdev in
3186 * this pool's configuration (remove the old, add the new).
3188 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, nvroot
) == 0);
3189 nvlist_free(nvroot
);
3194 * Walk the vdev tree and see if we can find a device with "better"
3195 * configuration. A configuration is "better" if the label on that
3196 * device has a more recent txg.
3199 spa_alt_rootvdev(vdev_t
*vd
, vdev_t
**avd
, uint64_t *txg
)
3203 for (c
= 0; c
< vd
->vdev_children
; c
++)
3204 spa_alt_rootvdev(vd
->vdev_child
[c
], avd
, txg
);
3206 if (vd
->vdev_ops
->vdev_op_leaf
) {
3210 if (vdev_disk_read_rootlabel(vd
->vdev_physpath
, vd
->vdev_devid
,
3214 VERIFY(nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_TXG
,
3218 * Do we have a better boot device?
3220 if (label_txg
> *txg
) {
3229 * Import a root pool.
3231 * For x86. devpath_list will consist of devid and/or physpath name of
3232 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3233 * The GRUB "findroot" command will return the vdev we should boot.
3235 * For Sparc, devpath_list consists the physpath name of the booting device
3236 * no matter the rootpool is a single device pool or a mirrored pool.
3238 * "/pci@1f,0/ide@d/disk@0,0:a"
3241 spa_import_rootpool(char *devpath
, char *devid
)
3244 vdev_t
*rvd
, *bvd
, *avd
= NULL
;
3245 nvlist_t
*config
, *nvtop
;
3251 * Read the label from the boot device and generate a configuration.
3253 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3254 #if defined(_OBP) && defined(_KERNEL)
3255 if (config
== NULL
) {
3256 if (strstr(devpath
, "/iscsi/ssd") != NULL
) {
3258 get_iscsi_bootpath_phy(devpath
);
3259 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3263 if (config
== NULL
) {
3264 cmn_err(CE_NOTE
, "Can not read the pool label from '%s'",
3269 VERIFY(nvlist_lookup_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3271 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
, &txg
) == 0);
3273 mutex_enter(&spa_namespace_lock
);
3274 if ((spa
= spa_lookup(pname
)) != NULL
) {
3276 * Remove the existing root pool from the namespace so that we
3277 * can replace it with the correct config we just read in.
3282 spa
= spa_add(pname
, config
, NULL
);
3283 spa
->spa_is_root
= B_TRUE
;
3284 spa
->spa_import_flags
= ZFS_IMPORT_VERBATIM
;
3287 * Build up a vdev tree based on the boot device's label config.
3289 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3291 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3292 error
= spa_config_parse(spa
, &rvd
, nvtop
, NULL
, 0,
3293 VDEV_ALLOC_ROOTPOOL
);
3294 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3296 mutex_exit(&spa_namespace_lock
);
3297 nvlist_free(config
);
3298 cmn_err(CE_NOTE
, "Can not parse the config for pool '%s'",
3304 * Get the boot vdev.
3306 if ((bvd
= vdev_lookup_by_guid(rvd
, guid
)) == NULL
) {
3307 cmn_err(CE_NOTE
, "Can not find the boot vdev for guid %llu",
3308 (u_longlong_t
)guid
);
3314 * Determine if there is a better boot device.
3317 spa_alt_rootvdev(rvd
, &avd
, &txg
);
3319 cmn_err(CE_NOTE
, "The boot device is 'degraded'. Please "
3320 "try booting from '%s'", avd
->vdev_path
);
3326 * If the boot device is part of a spare vdev then ensure that
3327 * we're booting off the active spare.
3329 if (bvd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
3330 !bvd
->vdev_isspare
) {
3331 cmn_err(CE_NOTE
, "The boot device is currently spared. Please "
3332 "try booting from '%s'",
3334 vdev_child
[bvd
->vdev_parent
->vdev_children
- 1]->vdev_path
);
3340 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3342 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3344 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3345 mutex_exit(&spa_namespace_lock
);
3347 nvlist_free(config
);
3354 * Import a non-root pool into the system.
3357 spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
, uint64_t flags
)
3360 char *altroot
= NULL
;
3361 spa_load_state_t state
= SPA_LOAD_IMPORT
;
3362 zpool_rewind_policy_t policy
;
3363 uint64_t mode
= spa_mode_global
;
3364 uint64_t readonly
= B_FALSE
;
3367 nvlist_t
**spares
, **l2cache
;
3368 uint_t nspares
, nl2cache
;
3371 * If a pool with this name exists, return failure.
3373 mutex_enter(&spa_namespace_lock
);
3374 if (spa_lookup(pool
) != NULL
) {
3375 mutex_exit(&spa_namespace_lock
);
3380 * Create and initialize the spa structure.
3382 (void) nvlist_lookup_string(props
,
3383 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3384 (void) nvlist_lookup_uint64(props
,
3385 zpool_prop_to_name(ZPOOL_PROP_READONLY
), &readonly
);
3388 spa
= spa_add(pool
, config
, altroot
);
3389 spa
->spa_import_flags
= flags
;
3392 * Verbatim import - Take a pool and insert it into the namespace
3393 * as if it had been loaded at boot.
3395 if (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) {
3397 spa_configfile_set(spa
, props
, B_FALSE
);
3399 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3401 mutex_exit(&spa_namespace_lock
);
3402 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3407 spa_activate(spa
, mode
);
3410 * Don't start async tasks until we know everything is healthy.
3412 spa_async_suspend(spa
);
3414 zpool_get_rewind_policy(config
, &policy
);
3415 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
3416 state
= SPA_LOAD_RECOVER
;
3419 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
3420 * because the user-supplied config is actually the one to trust when
3423 if (state
!= SPA_LOAD_RECOVER
)
3424 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
3426 error
= spa_load_best(spa
, state
, B_TRUE
, policy
.zrp_txg
,
3427 policy
.zrp_request
);
3430 * Propagate anything learned while loading the pool and pass it
3431 * back to caller (i.e. rewind info, missing devices, etc).
3433 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
3434 spa
->spa_load_info
) == 0);
3436 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3438 * Toss any existing sparelist, as it doesn't have any validity
3439 * anymore, and conflicts with spa_has_spare().
3441 if (spa
->spa_spares
.sav_config
) {
3442 nvlist_free(spa
->spa_spares
.sav_config
);
3443 spa
->spa_spares
.sav_config
= NULL
;
3444 spa_load_spares(spa
);
3446 if (spa
->spa_l2cache
.sav_config
) {
3447 nvlist_free(spa
->spa_l2cache
.sav_config
);
3448 spa
->spa_l2cache
.sav_config
= NULL
;
3449 spa_load_l2cache(spa
);
3452 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3455 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3458 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3459 VDEV_ALLOC_L2CACHE
);
3460 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3463 spa_configfile_set(spa
, props
, B_FALSE
);
3465 if (error
!= 0 || (props
&& spa_writeable(spa
) &&
3466 (error
= spa_prop_set(spa
, props
)))) {
3468 spa_deactivate(spa
);
3470 mutex_exit(&spa_namespace_lock
);
3474 spa_async_resume(spa
);
3477 * Override any spares and level 2 cache devices as specified by
3478 * the user, as these may have correct device names/devids, etc.
3480 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3481 &spares
, &nspares
) == 0) {
3482 if (spa
->spa_spares
.sav_config
)
3483 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
,
3484 ZPOOL_CONFIG_SPARES
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3486 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
,
3487 NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
3488 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3489 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3490 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3491 spa_load_spares(spa
);
3492 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3493 spa
->spa_spares
.sav_sync
= B_TRUE
;
3495 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3496 &l2cache
, &nl2cache
) == 0) {
3497 if (spa
->spa_l2cache
.sav_config
)
3498 VERIFY(nvlist_remove(spa
->spa_l2cache
.sav_config
,
3499 ZPOOL_CONFIG_L2CACHE
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3501 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3502 NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
3503 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3504 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3505 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3506 spa_load_l2cache(spa
);
3507 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3508 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3512 * Check for any removed devices.
3514 if (spa
->spa_autoreplace
) {
3515 spa_aux_check_removed(&spa
->spa_spares
);
3516 spa_aux_check_removed(&spa
->spa_l2cache
);
3519 if (spa_writeable(spa
)) {
3521 * Update the config cache to include the newly-imported pool.
3523 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
3527 * It's possible that the pool was expanded while it was exported.
3528 * We kick off an async task to handle this for us.
3530 spa_async_request(spa
, SPA_ASYNC_AUTOEXPAND
);
3532 mutex_exit(&spa_namespace_lock
);
3533 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3539 spa_tryimport(nvlist_t
*tryconfig
)
3541 nvlist_t
*config
= NULL
;
3547 if (nvlist_lookup_string(tryconfig
, ZPOOL_CONFIG_POOL_NAME
, &poolname
))
3550 if (nvlist_lookup_uint64(tryconfig
, ZPOOL_CONFIG_POOL_STATE
, &state
))
3554 * Create and initialize the spa structure.
3556 mutex_enter(&spa_namespace_lock
);
3557 spa
= spa_add(TRYIMPORT_NAME
, tryconfig
, NULL
);
3558 spa_activate(spa
, FREAD
);
3561 * Pass off the heavy lifting to spa_load().
3562 * Pass TRUE for mosconfig because the user-supplied config
3563 * is actually the one to trust when doing an import.
3565 error
= spa_load(spa
, SPA_LOAD_TRYIMPORT
, SPA_IMPORT_EXISTING
, B_TRUE
);
3568 * If 'tryconfig' was at least parsable, return the current config.
3570 if (spa
->spa_root_vdev
!= NULL
) {
3571 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
3572 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3574 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
3576 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_TIMESTAMP
,
3577 spa
->spa_uberblock
.ub_timestamp
) == 0);
3580 * If the bootfs property exists on this pool then we
3581 * copy it out so that external consumers can tell which
3582 * pools are bootable.
3584 if ((!error
|| error
== EEXIST
) && spa
->spa_bootfs
) {
3585 char *tmpname
= kmem_alloc(MAXPATHLEN
, KM_PUSHPAGE
);
3588 * We have to play games with the name since the
3589 * pool was opened as TRYIMPORT_NAME.
3591 if (dsl_dsobj_to_dsname(spa_name(spa
),
3592 spa
->spa_bootfs
, tmpname
) == 0) {
3594 char *dsname
= kmem_alloc(MAXPATHLEN
, KM_PUSHPAGE
);
3596 cp
= strchr(tmpname
, '/');
3598 (void) strlcpy(dsname
, tmpname
,
3601 (void) snprintf(dsname
, MAXPATHLEN
,
3602 "%s/%s", poolname
, ++cp
);
3604 VERIFY(nvlist_add_string(config
,
3605 ZPOOL_CONFIG_BOOTFS
, dsname
) == 0);
3606 kmem_free(dsname
, MAXPATHLEN
);
3608 kmem_free(tmpname
, MAXPATHLEN
);
3612 * Add the list of hot spares and level 2 cache devices.
3614 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3615 spa_add_spares(spa
, config
);
3616 spa_add_l2cache(spa
, config
);
3617 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3621 spa_deactivate(spa
);
3623 mutex_exit(&spa_namespace_lock
);
3629 * Pool export/destroy
3631 * The act of destroying or exporting a pool is very simple. We make sure there
3632 * is no more pending I/O and any references to the pool are gone. Then, we
3633 * update the pool state and sync all the labels to disk, removing the
3634 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
3635 * we don't sync the labels or remove the configuration cache.
3638 spa_export_common(char *pool
, int new_state
, nvlist_t
**oldconfig
,
3639 boolean_t force
, boolean_t hardforce
)
3646 if (!(spa_mode_global
& FWRITE
))
3649 mutex_enter(&spa_namespace_lock
);
3650 if ((spa
= spa_lookup(pool
)) == NULL
) {
3651 mutex_exit(&spa_namespace_lock
);
3656 * Put a hold on the pool, drop the namespace lock, stop async tasks,
3657 * reacquire the namespace lock, and see if we can export.
3659 spa_open_ref(spa
, FTAG
);
3660 mutex_exit(&spa_namespace_lock
);
3661 spa_async_suspend(spa
);
3662 mutex_enter(&spa_namespace_lock
);
3663 spa_close(spa
, FTAG
);
3666 * The pool will be in core if it's openable,
3667 * in which case we can modify its state.
3669 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
&& spa
->spa_sync_on
) {
3671 * Objsets may be open only because they're dirty, so we
3672 * have to force it to sync before checking spa_refcnt.
3674 txg_wait_synced(spa
->spa_dsl_pool
, 0);
3677 * A pool cannot be exported or destroyed if there are active
3678 * references. If we are resetting a pool, allow references by
3679 * fault injection handlers.
3681 if (!spa_refcount_zero(spa
) ||
3682 (spa
->spa_inject_ref
!= 0 &&
3683 new_state
!= POOL_STATE_UNINITIALIZED
)) {
3684 spa_async_resume(spa
);
3685 mutex_exit(&spa_namespace_lock
);
3690 * A pool cannot be exported if it has an active shared spare.
3691 * This is to prevent other pools stealing the active spare
3692 * from an exported pool. At user's own will, such pool can
3693 * be forcedly exported.
3695 if (!force
&& new_state
== POOL_STATE_EXPORTED
&&
3696 spa_has_active_shared_spare(spa
)) {
3697 spa_async_resume(spa
);
3698 mutex_exit(&spa_namespace_lock
);
3703 * We want this to be reflected on every label,
3704 * so mark them all dirty. spa_unload() will do the
3705 * final sync that pushes these changes out.
3707 if (new_state
!= POOL_STATE_UNINITIALIZED
&& !hardforce
) {
3708 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3709 spa
->spa_state
= new_state
;
3710 spa
->spa_final_txg
= spa_last_synced_txg(spa
) +
3712 vdev_config_dirty(spa
->spa_root_vdev
);
3713 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3717 spa_event_notify(spa
, NULL
, FM_EREPORT_ZFS_POOL_DESTROY
);
3719 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
3721 spa_deactivate(spa
);
3724 if (oldconfig
&& spa
->spa_config
)
3725 VERIFY(nvlist_dup(spa
->spa_config
, oldconfig
, 0) == 0);
3727 if (new_state
!= POOL_STATE_UNINITIALIZED
) {
3729 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
3732 mutex_exit(&spa_namespace_lock
);
3738 * Destroy a storage pool.
3741 spa_destroy(char *pool
)
3743 return (spa_export_common(pool
, POOL_STATE_DESTROYED
, NULL
,
3748 * Export a storage pool.
3751 spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
3752 boolean_t hardforce
)
3754 return (spa_export_common(pool
, POOL_STATE_EXPORTED
, oldconfig
,
3759 * Similar to spa_export(), this unloads the spa_t without actually removing it
3760 * from the namespace in any way.
3763 spa_reset(char *pool
)
3765 return (spa_export_common(pool
, POOL_STATE_UNINITIALIZED
, NULL
,
3770 * ==========================================================================
3771 * Device manipulation
3772 * ==========================================================================
3776 * Add a device to a storage pool.
3779 spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
)
3783 vdev_t
*rvd
= spa
->spa_root_vdev
;
3785 nvlist_t
**spares
, **l2cache
;
3786 uint_t nspares
, nl2cache
;
3789 ASSERT(spa_writeable(spa
));
3791 txg
= spa_vdev_enter(spa
);
3793 if ((error
= spa_config_parse(spa
, &vd
, nvroot
, NULL
, 0,
3794 VDEV_ALLOC_ADD
)) != 0)
3795 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
3797 spa
->spa_pending_vdev
= vd
; /* spa_vdev_exit() will clear this */
3799 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
, &spares
,
3803 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
, &l2cache
,
3807 if (vd
->vdev_children
== 0 && nspares
== 0 && nl2cache
== 0)
3808 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
3810 if (vd
->vdev_children
!= 0 &&
3811 (error
= vdev_create(vd
, txg
, B_FALSE
)) != 0)
3812 return (spa_vdev_exit(spa
, vd
, txg
, error
));
3815 * We must validate the spares and l2cache devices after checking the
3816 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
3818 if ((error
= spa_validate_aux(spa
, nvroot
, txg
, VDEV_ALLOC_ADD
)) != 0)
3819 return (spa_vdev_exit(spa
, vd
, txg
, error
));
3822 * Transfer each new top-level vdev from vd to rvd.
3824 for (c
= 0; c
< vd
->vdev_children
; c
++) {
3827 * Set the vdev id to the first hole, if one exists.
3829 for (id
= 0; id
< rvd
->vdev_children
; id
++) {
3830 if (rvd
->vdev_child
[id
]->vdev_ishole
) {
3831 vdev_free(rvd
->vdev_child
[id
]);
3835 tvd
= vd
->vdev_child
[c
];
3836 vdev_remove_child(vd
, tvd
);
3838 vdev_add_child(rvd
, tvd
);
3839 vdev_config_dirty(tvd
);
3843 spa_set_aux_vdevs(&spa
->spa_spares
, spares
, nspares
,
3844 ZPOOL_CONFIG_SPARES
);
3845 spa_load_spares(spa
);
3846 spa
->spa_spares
.sav_sync
= B_TRUE
;
3849 if (nl2cache
!= 0) {
3850 spa_set_aux_vdevs(&spa
->spa_l2cache
, l2cache
, nl2cache
,
3851 ZPOOL_CONFIG_L2CACHE
);
3852 spa_load_l2cache(spa
);
3853 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3857 * We have to be careful when adding new vdevs to an existing pool.
3858 * If other threads start allocating from these vdevs before we
3859 * sync the config cache, and we lose power, then upon reboot we may
3860 * fail to open the pool because there are DVAs that the config cache
3861 * can't translate. Therefore, we first add the vdevs without
3862 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
3863 * and then let spa_config_update() initialize the new metaslabs.
3865 * spa_load() checks for added-but-not-initialized vdevs, so that
3866 * if we lose power at any point in this sequence, the remaining
3867 * steps will be completed the next time we load the pool.
3869 (void) spa_vdev_exit(spa
, vd
, txg
, 0);
3871 mutex_enter(&spa_namespace_lock
);
3872 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
3873 mutex_exit(&spa_namespace_lock
);
3879 * Attach a device to a mirror. The arguments are the path to any device
3880 * in the mirror, and the nvroot for the new device. If the path specifies
3881 * a device that is not mirrored, we automatically insert the mirror vdev.
3883 * If 'replacing' is specified, the new device is intended to replace the
3884 * existing device; in this case the two devices are made into their own
3885 * mirror using the 'replacing' vdev, which is functionally identical to
3886 * the mirror vdev (it actually reuses all the same ops) but has a few
3887 * extra rules: you can't attach to it after it's been created, and upon
3888 * completion of resilvering, the first disk (the one being replaced)
3889 * is automatically detached.
3892 spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
, int replacing
)
3894 uint64_t txg
, dtl_max_txg
;
3895 ASSERTV(vdev_t
*rvd
= spa
->spa_root_vdev
;)
3896 vdev_t
*oldvd
, *newvd
, *newrootvd
, *pvd
, *tvd
;
3898 char *oldvdpath
, *newvdpath
;
3902 ASSERT(spa_writeable(spa
));
3904 txg
= spa_vdev_enter(spa
);
3906 oldvd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
3909 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
3911 if (!oldvd
->vdev_ops
->vdev_op_leaf
)
3912 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
3914 pvd
= oldvd
->vdev_parent
;
3916 if ((error
= spa_config_parse(spa
, &newrootvd
, nvroot
, NULL
, 0,
3917 VDEV_ALLOC_ATTACH
)) != 0)
3918 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
3920 if (newrootvd
->vdev_children
!= 1)
3921 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
3923 newvd
= newrootvd
->vdev_child
[0];
3925 if (!newvd
->vdev_ops
->vdev_op_leaf
)
3926 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
3928 if ((error
= vdev_create(newrootvd
, txg
, replacing
)) != 0)
3929 return (spa_vdev_exit(spa
, newrootvd
, txg
, error
));
3932 * Spares can't replace logs
3934 if (oldvd
->vdev_top
->vdev_islog
&& newvd
->vdev_isspare
)
3935 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3939 * For attach, the only allowable parent is a mirror or the root
3942 if (pvd
->vdev_ops
!= &vdev_mirror_ops
&&
3943 pvd
->vdev_ops
!= &vdev_root_ops
)
3944 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3946 pvops
= &vdev_mirror_ops
;
3949 * Active hot spares can only be replaced by inactive hot
3952 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
3953 oldvd
->vdev_isspare
&&
3954 !spa_has_spare(spa
, newvd
->vdev_guid
))
3955 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3958 * If the source is a hot spare, and the parent isn't already a
3959 * spare, then we want to create a new hot spare. Otherwise, we
3960 * want to create a replacing vdev. The user is not allowed to
3961 * attach to a spared vdev child unless the 'isspare' state is
3962 * the same (spare replaces spare, non-spare replaces
3965 if (pvd
->vdev_ops
== &vdev_replacing_ops
&&
3966 spa_version(spa
) < SPA_VERSION_MULTI_REPLACE
) {
3967 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3968 } else if (pvd
->vdev_ops
== &vdev_spare_ops
&&
3969 newvd
->vdev_isspare
!= oldvd
->vdev_isspare
) {
3970 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3973 if (newvd
->vdev_isspare
)
3974 pvops
= &vdev_spare_ops
;
3976 pvops
= &vdev_replacing_ops
;
3980 * Make sure the new device is big enough.
3982 if (newvd
->vdev_asize
< vdev_get_min_asize(oldvd
))
3983 return (spa_vdev_exit(spa
, newrootvd
, txg
, EOVERFLOW
));
3986 * The new device cannot have a higher alignment requirement
3987 * than the top-level vdev.
3989 if (newvd
->vdev_ashift
> oldvd
->vdev_top
->vdev_ashift
)
3990 return (spa_vdev_exit(spa
, newrootvd
, txg
, EDOM
));
3993 * If this is an in-place replacement, update oldvd's path and devid
3994 * to make it distinguishable from newvd, and unopenable from now on.
3996 if (strcmp(oldvd
->vdev_path
, newvd
->vdev_path
) == 0) {
3997 spa_strfree(oldvd
->vdev_path
);
3998 oldvd
->vdev_path
= kmem_alloc(strlen(newvd
->vdev_path
) + 5,
4000 (void) sprintf(oldvd
->vdev_path
, "%s/%s",
4001 newvd
->vdev_path
, "old");
4002 if (oldvd
->vdev_devid
!= NULL
) {
4003 spa_strfree(oldvd
->vdev_devid
);
4004 oldvd
->vdev_devid
= NULL
;
4008 /* mark the device being resilvered */
4009 newvd
->vdev_resilvering
= B_TRUE
;
4012 * If the parent is not a mirror, or if we're replacing, insert the new
4013 * mirror/replacing/spare vdev above oldvd.
4015 if (pvd
->vdev_ops
!= pvops
)
4016 pvd
= vdev_add_parent(oldvd
, pvops
);
4018 ASSERT(pvd
->vdev_top
->vdev_parent
== rvd
);
4019 ASSERT(pvd
->vdev_ops
== pvops
);
4020 ASSERT(oldvd
->vdev_parent
== pvd
);
4023 * Extract the new device from its root and add it to pvd.
4025 vdev_remove_child(newrootvd
, newvd
);
4026 newvd
->vdev_id
= pvd
->vdev_children
;
4027 newvd
->vdev_crtxg
= oldvd
->vdev_crtxg
;
4028 vdev_add_child(pvd
, newvd
);
4030 tvd
= newvd
->vdev_top
;
4031 ASSERT(pvd
->vdev_top
== tvd
);
4032 ASSERT(tvd
->vdev_parent
== rvd
);
4034 vdev_config_dirty(tvd
);
4037 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
4038 * for any dmu_sync-ed blocks. It will propagate upward when
4039 * spa_vdev_exit() calls vdev_dtl_reassess().
4041 dtl_max_txg
= txg
+ TXG_CONCURRENT_STATES
;
4043 vdev_dtl_dirty(newvd
, DTL_MISSING
, TXG_INITIAL
,
4044 dtl_max_txg
- TXG_INITIAL
);
4046 if (newvd
->vdev_isspare
) {
4047 spa_spare_activate(newvd
);
4048 spa_event_notify(spa
, newvd
, FM_EREPORT_ZFS_DEVICE_SPARE
);
4051 oldvdpath
= spa_strdup(oldvd
->vdev_path
);
4052 newvdpath
= spa_strdup(newvd
->vdev_path
);
4053 newvd_isspare
= newvd
->vdev_isspare
;
4056 * Mark newvd's DTL dirty in this txg.
4058 vdev_dirty(tvd
, VDD_DTL
, newvd
, txg
);
4061 * Restart the resilver
4063 dsl_resilver_restart(spa
->spa_dsl_pool
, dtl_max_txg
);
4068 (void) spa_vdev_exit(spa
, newrootvd
, dtl_max_txg
, 0);
4070 spa_history_log_internal(LOG_POOL_VDEV_ATTACH
, spa
, NULL
,
4071 "%s vdev=%s %s vdev=%s",
4072 replacing
&& newvd_isspare
? "spare in" :
4073 replacing
? "replace" : "attach", newvdpath
,
4074 replacing
? "for" : "to", oldvdpath
);
4076 spa_strfree(oldvdpath
);
4077 spa_strfree(newvdpath
);
4079 if (spa
->spa_bootfs
)
4080 spa_event_notify(spa
, newvd
, FM_EREPORT_ZFS_BOOTFS_VDEV_ATTACH
);
4086 * Detach a device from a mirror or replacing vdev.
4087 * If 'replace_done' is specified, only detach if the parent
4088 * is a replacing vdev.
4091 spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
, int replace_done
)
4095 ASSERTV(vdev_t
*rvd
= spa
->spa_root_vdev
;)
4096 vdev_t
*vd
, *pvd
, *cvd
, *tvd
;
4097 boolean_t unspare
= B_FALSE
;
4098 uint64_t unspare_guid
= 0;
4102 ASSERT(spa_writeable(spa
));
4104 txg
= spa_vdev_enter(spa
);
4106 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4109 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4111 if (!vd
->vdev_ops
->vdev_op_leaf
)
4112 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4114 pvd
= vd
->vdev_parent
;
4117 * If the parent/child relationship is not as expected, don't do it.
4118 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4119 * vdev that's replacing B with C. The user's intent in replacing
4120 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4121 * the replace by detaching C, the expected behavior is to end up
4122 * M(A,B). But suppose that right after deciding to detach C,
4123 * the replacement of B completes. We would have M(A,C), and then
4124 * ask to detach C, which would leave us with just A -- not what
4125 * the user wanted. To prevent this, we make sure that the
4126 * parent/child relationship hasn't changed -- in this example,
4127 * that C's parent is still the replacing vdev R.
4129 if (pvd
->vdev_guid
!= pguid
&& pguid
!= 0)
4130 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4133 * Only 'replacing' or 'spare' vdevs can be replaced.
4135 if (replace_done
&& pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4136 pvd
->vdev_ops
!= &vdev_spare_ops
)
4137 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4139 ASSERT(pvd
->vdev_ops
!= &vdev_spare_ops
||
4140 spa_version(spa
) >= SPA_VERSION_SPARES
);
4143 * Only mirror, replacing, and spare vdevs support detach.
4145 if (pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4146 pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4147 pvd
->vdev_ops
!= &vdev_spare_ops
)
4148 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4151 * If this device has the only valid copy of some data,
4152 * we cannot safely detach it.
4154 if (vdev_dtl_required(vd
))
4155 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4157 ASSERT(pvd
->vdev_children
>= 2);
4160 * If we are detaching the second disk from a replacing vdev, then
4161 * check to see if we changed the original vdev's path to have "/old"
4162 * at the end in spa_vdev_attach(). If so, undo that change now.
4164 if (pvd
->vdev_ops
== &vdev_replacing_ops
&& vd
->vdev_id
> 0 &&
4165 vd
->vdev_path
!= NULL
) {
4166 size_t len
= strlen(vd
->vdev_path
);
4168 for (c
= 0; c
< pvd
->vdev_children
; c
++) {
4169 cvd
= pvd
->vdev_child
[c
];
4171 if (cvd
== vd
|| cvd
->vdev_path
== NULL
)
4174 if (strncmp(cvd
->vdev_path
, vd
->vdev_path
, len
) == 0 &&
4175 strcmp(cvd
->vdev_path
+ len
, "/old") == 0) {
4176 spa_strfree(cvd
->vdev_path
);
4177 cvd
->vdev_path
= spa_strdup(vd
->vdev_path
);
4184 * If we are detaching the original disk from a spare, then it implies
4185 * that the spare should become a real disk, and be removed from the
4186 * active spare list for the pool.
4188 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4190 pvd
->vdev_child
[pvd
->vdev_children
- 1]->vdev_isspare
)
4194 * Erase the disk labels so the disk can be used for other things.
4195 * This must be done after all other error cases are handled,
4196 * but before we disembowel vd (so we can still do I/O to it).
4197 * But if we can't do it, don't treat the error as fatal --
4198 * it may be that the unwritability of the disk is the reason
4199 * it's being detached!
4201 error
= vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4204 * Remove vd from its parent and compact the parent's children.
4206 vdev_remove_child(pvd
, vd
);
4207 vdev_compact_children(pvd
);
4210 * Remember one of the remaining children so we can get tvd below.
4212 cvd
= pvd
->vdev_child
[pvd
->vdev_children
- 1];
4215 * If we need to remove the remaining child from the list of hot spares,
4216 * do it now, marking the vdev as no longer a spare in the process.
4217 * We must do this before vdev_remove_parent(), because that can
4218 * change the GUID if it creates a new toplevel GUID. For a similar
4219 * reason, we must remove the spare now, in the same txg as the detach;
4220 * otherwise someone could attach a new sibling, change the GUID, and
4221 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
4224 ASSERT(cvd
->vdev_isspare
);
4225 spa_spare_remove(cvd
);
4226 unspare_guid
= cvd
->vdev_guid
;
4227 (void) spa_vdev_remove(spa
, unspare_guid
, B_TRUE
);
4228 cvd
->vdev_unspare
= B_TRUE
;
4232 * If the parent mirror/replacing vdev only has one child,
4233 * the parent is no longer needed. Remove it from the tree.
4235 if (pvd
->vdev_children
== 1) {
4236 if (pvd
->vdev_ops
== &vdev_spare_ops
)
4237 cvd
->vdev_unspare
= B_FALSE
;
4238 vdev_remove_parent(cvd
);
4239 cvd
->vdev_resilvering
= B_FALSE
;
4244 * We don't set tvd until now because the parent we just removed
4245 * may have been the previous top-level vdev.
4247 tvd
= cvd
->vdev_top
;
4248 ASSERT(tvd
->vdev_parent
== rvd
);
4251 * Reevaluate the parent vdev state.
4253 vdev_propagate_state(cvd
);
4256 * If the 'autoexpand' property is set on the pool then automatically
4257 * try to expand the size of the pool. For example if the device we
4258 * just detached was smaller than the others, it may be possible to
4259 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
4260 * first so that we can obtain the updated sizes of the leaf vdevs.
4262 if (spa
->spa_autoexpand
) {
4264 vdev_expand(tvd
, txg
);
4267 vdev_config_dirty(tvd
);
4270 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
4271 * vd->vdev_detached is set and free vd's DTL object in syncing context.
4272 * But first make sure we're not on any *other* txg's DTL list, to
4273 * prevent vd from being accessed after it's freed.
4275 vdpath
= spa_strdup(vd
->vdev_path
);
4276 for (t
= 0; t
< TXG_SIZE
; t
++)
4277 (void) txg_list_remove_this(&tvd
->vdev_dtl_list
, vd
, t
);
4278 vd
->vdev_detached
= B_TRUE
;
4279 vdev_dirty(tvd
, VDD_DTL
, vd
, txg
);
4281 spa_event_notify(spa
, vd
, FM_EREPORT_ZFS_DEVICE_REMOVE
);
4283 /* hang on to the spa before we release the lock */
4284 spa_open_ref(spa
, FTAG
);
4286 error
= spa_vdev_exit(spa
, vd
, txg
, 0);
4288 spa_history_log_internal(LOG_POOL_VDEV_DETACH
, spa
, NULL
,
4290 spa_strfree(vdpath
);
4293 * If this was the removal of the original device in a hot spare vdev,
4294 * then we want to go through and remove the device from the hot spare
4295 * list of every other pool.
4298 spa_t
*altspa
= NULL
;
4300 mutex_enter(&spa_namespace_lock
);
4301 while ((altspa
= spa_next(altspa
)) != NULL
) {
4302 if (altspa
->spa_state
!= POOL_STATE_ACTIVE
||
4306 spa_open_ref(altspa
, FTAG
);
4307 mutex_exit(&spa_namespace_lock
);
4308 (void) spa_vdev_remove(altspa
, unspare_guid
, B_TRUE
);
4309 mutex_enter(&spa_namespace_lock
);
4310 spa_close(altspa
, FTAG
);
4312 mutex_exit(&spa_namespace_lock
);
4314 /* search the rest of the vdevs for spares to remove */
4315 spa_vdev_resilver_done(spa
);
4318 /* all done with the spa; OK to release */
4319 mutex_enter(&spa_namespace_lock
);
4320 spa_close(spa
, FTAG
);
4321 mutex_exit(&spa_namespace_lock
);
4327 * Split a set of devices from their mirrors, and create a new pool from them.
4330 spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
4331 nvlist_t
*props
, boolean_t exp
)
4334 uint64_t txg
, *glist
;
4336 uint_t c
, children
, lastlog
;
4337 nvlist_t
**child
, *nvl
, *tmp
;
4339 char *altroot
= NULL
;
4340 vdev_t
*rvd
, **vml
= NULL
; /* vdev modify list */
4341 boolean_t activate_slog
;
4343 ASSERT(spa_writeable(spa
));
4345 txg
= spa_vdev_enter(spa
);
4347 /* clear the log and flush everything up to now */
4348 activate_slog
= spa_passivate_log(spa
);
4349 (void) spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4350 error
= spa_offline_log(spa
);
4351 txg
= spa_vdev_config_enter(spa
);
4354 spa_activate_log(spa
);
4357 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4359 /* check new spa name before going any further */
4360 if (spa_lookup(newname
) != NULL
)
4361 return (spa_vdev_exit(spa
, NULL
, txg
, EEXIST
));
4364 * scan through all the children to ensure they're all mirrors
4366 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
) != 0 ||
4367 nvlist_lookup_nvlist_array(nvl
, ZPOOL_CONFIG_CHILDREN
, &child
,
4369 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4371 /* first, check to ensure we've got the right child count */
4372 rvd
= spa
->spa_root_vdev
;
4374 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
4375 vdev_t
*vd
= rvd
->vdev_child
[c
];
4377 /* don't count the holes & logs as children */
4378 if (vd
->vdev_islog
|| vd
->vdev_ishole
) {
4386 if (children
!= (lastlog
!= 0 ? lastlog
: rvd
->vdev_children
))
4387 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4389 /* next, ensure no spare or cache devices are part of the split */
4390 if (nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_SPARES
, &tmp
) == 0 ||
4391 nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_L2CACHE
, &tmp
) == 0)
4392 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4394 vml
= kmem_zalloc(children
* sizeof (vdev_t
*), KM_PUSHPAGE
);
4395 glist
= kmem_zalloc(children
* sizeof (uint64_t), KM_PUSHPAGE
);
4397 /* then, loop over each vdev and validate it */
4398 for (c
= 0; c
< children
; c
++) {
4399 uint64_t is_hole
= 0;
4401 (void) nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_IS_HOLE
,
4405 if (spa
->spa_root_vdev
->vdev_child
[c
]->vdev_ishole
||
4406 spa
->spa_root_vdev
->vdev_child
[c
]->vdev_islog
) {
4414 /* which disk is going to be split? */
4415 if (nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_GUID
,
4421 /* look it up in the spa */
4422 vml
[c
] = spa_lookup_by_guid(spa
, glist
[c
], B_FALSE
);
4423 if (vml
[c
] == NULL
) {
4428 /* make sure there's nothing stopping the split */
4429 if (vml
[c
]->vdev_parent
->vdev_ops
!= &vdev_mirror_ops
||
4430 vml
[c
]->vdev_islog
||
4431 vml
[c
]->vdev_ishole
||
4432 vml
[c
]->vdev_isspare
||
4433 vml
[c
]->vdev_isl2cache
||
4434 !vdev_writeable(vml
[c
]) ||
4435 vml
[c
]->vdev_children
!= 0 ||
4436 vml
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
||
4437 c
!= spa
->spa_root_vdev
->vdev_child
[c
]->vdev_id
) {
4442 if (vdev_dtl_required(vml
[c
])) {
4447 /* we need certain info from the top level */
4448 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_ARRAY
,
4449 vml
[c
]->vdev_top
->vdev_ms_array
) == 0);
4450 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_SHIFT
,
4451 vml
[c
]->vdev_top
->vdev_ms_shift
) == 0);
4452 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASIZE
,
4453 vml
[c
]->vdev_top
->vdev_asize
) == 0);
4454 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASHIFT
,
4455 vml
[c
]->vdev_top
->vdev_ashift
) == 0);
4459 kmem_free(vml
, children
* sizeof (vdev_t
*));
4460 kmem_free(glist
, children
* sizeof (uint64_t));
4461 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4464 /* stop writers from using the disks */
4465 for (c
= 0; c
< children
; c
++) {
4467 vml
[c
]->vdev_offline
= B_TRUE
;
4469 vdev_reopen(spa
->spa_root_vdev
);
4472 * Temporarily record the splitting vdevs in the spa config. This
4473 * will disappear once the config is regenerated.
4475 VERIFY(nvlist_alloc(&nvl
, NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
4476 VERIFY(nvlist_add_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
4477 glist
, children
) == 0);
4478 kmem_free(glist
, children
* sizeof (uint64_t));
4480 mutex_enter(&spa
->spa_props_lock
);
4481 VERIFY(nvlist_add_nvlist(spa
->spa_config
, ZPOOL_CONFIG_SPLIT
,
4483 mutex_exit(&spa
->spa_props_lock
);
4484 spa
->spa_config_splitting
= nvl
;
4485 vdev_config_dirty(spa
->spa_root_vdev
);
4487 /* configure and create the new pool */
4488 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
, newname
) == 0);
4489 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
4490 exp
? POOL_STATE_EXPORTED
: POOL_STATE_ACTIVE
) == 0);
4491 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
4492 spa_version(spa
)) == 0);
4493 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
4494 spa
->spa_config_txg
) == 0);
4495 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
4496 spa_generate_guid(NULL
)) == 0);
4497 (void) nvlist_lookup_string(props
,
4498 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
4500 /* add the new pool to the namespace */
4501 newspa
= spa_add(newname
, config
, altroot
);
4502 newspa
->spa_config_txg
= spa
->spa_config_txg
;
4503 spa_set_log_state(newspa
, SPA_LOG_CLEAR
);
4505 /* release the spa config lock, retaining the namespace lock */
4506 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4508 if (zio_injection_enabled
)
4509 zio_handle_panic_injection(spa
, FTAG
, 1);
4511 spa_activate(newspa
, spa_mode_global
);
4512 spa_async_suspend(newspa
);
4514 /* create the new pool from the disks of the original pool */
4515 error
= spa_load(newspa
, SPA_LOAD_IMPORT
, SPA_IMPORT_ASSEMBLE
, B_TRUE
);
4519 /* if that worked, generate a real config for the new pool */
4520 if (newspa
->spa_root_vdev
!= NULL
) {
4521 VERIFY(nvlist_alloc(&newspa
->spa_config_splitting
,
4522 NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
4523 VERIFY(nvlist_add_uint64(newspa
->spa_config_splitting
,
4524 ZPOOL_CONFIG_SPLIT_GUID
, spa_guid(spa
)) == 0);
4525 spa_config_set(newspa
, spa_config_generate(newspa
, NULL
, -1ULL,
4530 if (props
!= NULL
) {
4531 spa_configfile_set(newspa
, props
, B_FALSE
);
4532 error
= spa_prop_set(newspa
, props
);
4537 /* flush everything */
4538 txg
= spa_vdev_config_enter(newspa
);
4539 vdev_config_dirty(newspa
->spa_root_vdev
);
4540 (void) spa_vdev_config_exit(newspa
, NULL
, txg
, 0, FTAG
);
4542 if (zio_injection_enabled
)
4543 zio_handle_panic_injection(spa
, FTAG
, 2);
4545 spa_async_resume(newspa
);
4547 /* finally, update the original pool's config */
4548 txg
= spa_vdev_config_enter(spa
);
4549 tx
= dmu_tx_create_dd(spa_get_dsl(spa
)->dp_mos_dir
);
4550 error
= dmu_tx_assign(tx
, TXG_WAIT
);
4553 for (c
= 0; c
< children
; c
++) {
4554 if (vml
[c
] != NULL
) {
4557 spa_history_log_internal(LOG_POOL_VDEV_DETACH
,
4563 vdev_config_dirty(spa
->spa_root_vdev
);
4564 spa
->spa_config_splitting
= NULL
;
4568 (void) spa_vdev_exit(spa
, NULL
, txg
, 0);
4570 if (zio_injection_enabled
)
4571 zio_handle_panic_injection(spa
, FTAG
, 3);
4573 /* split is complete; log a history record */
4574 spa_history_log_internal(LOG_POOL_SPLIT
, newspa
, NULL
,
4575 "split new pool %s from pool %s", newname
, spa_name(spa
));
4577 kmem_free(vml
, children
* sizeof (vdev_t
*));
4579 /* if we're not going to mount the filesystems in userland, export */
4581 error
= spa_export_common(newname
, POOL_STATE_EXPORTED
, NULL
,
4588 spa_deactivate(newspa
);
4591 txg
= spa_vdev_config_enter(spa
);
4593 /* re-online all offlined disks */
4594 for (c
= 0; c
< children
; c
++) {
4596 vml
[c
]->vdev_offline
= B_FALSE
;
4598 vdev_reopen(spa
->spa_root_vdev
);
4600 nvlist_free(spa
->spa_config_splitting
);
4601 spa
->spa_config_splitting
= NULL
;
4602 (void) spa_vdev_exit(spa
, NULL
, txg
, error
);
4604 kmem_free(vml
, children
* sizeof (vdev_t
*));
4609 spa_nvlist_lookup_by_guid(nvlist_t
**nvpp
, int count
, uint64_t target_guid
)
4613 for (i
= 0; i
< count
; i
++) {
4616 VERIFY(nvlist_lookup_uint64(nvpp
[i
], ZPOOL_CONFIG_GUID
,
4619 if (guid
== target_guid
)
4627 spa_vdev_remove_aux(nvlist_t
*config
, char *name
, nvlist_t
**dev
, int count
,
4628 nvlist_t
*dev_to_remove
)
4630 nvlist_t
**newdev
= NULL
;
4634 newdev
= kmem_alloc((count
- 1) * sizeof (void *), KM_PUSHPAGE
);
4636 for (i
= 0, j
= 0; i
< count
; i
++) {
4637 if (dev
[i
] == dev_to_remove
)
4639 VERIFY(nvlist_dup(dev
[i
], &newdev
[j
++], KM_PUSHPAGE
) == 0);
4642 VERIFY(nvlist_remove(config
, name
, DATA_TYPE_NVLIST_ARRAY
) == 0);
4643 VERIFY(nvlist_add_nvlist_array(config
, name
, newdev
, count
- 1) == 0);
4645 for (i
= 0; i
< count
- 1; i
++)
4646 nvlist_free(newdev
[i
]);
4649 kmem_free(newdev
, (count
- 1) * sizeof (void *));
4653 * Evacuate the device.
4656 spa_vdev_remove_evacuate(spa_t
*spa
, vdev_t
*vd
)
4661 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
4662 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
4663 ASSERT(vd
== vd
->vdev_top
);
4666 * Evacuate the device. We don't hold the config lock as writer
4667 * since we need to do I/O but we do keep the
4668 * spa_namespace_lock held. Once this completes the device
4669 * should no longer have any blocks allocated on it.
4671 if (vd
->vdev_islog
) {
4672 if (vd
->vdev_stat
.vs_alloc
!= 0)
4673 error
= spa_offline_log(spa
);
4682 * The evacuation succeeded. Remove any remaining MOS metadata
4683 * associated with this vdev, and wait for these changes to sync.
4685 ASSERT3U(vd
->vdev_stat
.vs_alloc
, ==, 0);
4686 txg
= spa_vdev_config_enter(spa
);
4687 vd
->vdev_removing
= B_TRUE
;
4688 vdev_dirty(vd
, 0, NULL
, txg
);
4689 vdev_config_dirty(vd
);
4690 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4696 * Complete the removal by cleaning up the namespace.
4699 spa_vdev_remove_from_namespace(spa_t
*spa
, vdev_t
*vd
)
4701 vdev_t
*rvd
= spa
->spa_root_vdev
;
4702 uint64_t id
= vd
->vdev_id
;
4703 boolean_t last_vdev
= (id
== (rvd
->vdev_children
- 1));
4705 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
4706 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
4707 ASSERT(vd
== vd
->vdev_top
);
4710 * Only remove any devices which are empty.
4712 if (vd
->vdev_stat
.vs_alloc
!= 0)
4715 (void) vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4717 if (list_link_active(&vd
->vdev_state_dirty_node
))
4718 vdev_state_clean(vd
);
4719 if (list_link_active(&vd
->vdev_config_dirty_node
))
4720 vdev_config_clean(vd
);
4725 vdev_compact_children(rvd
);
4727 vd
= vdev_alloc_common(spa
, id
, 0, &vdev_hole_ops
);
4728 vdev_add_child(rvd
, vd
);
4730 vdev_config_dirty(rvd
);
4733 * Reassess the health of our root vdev.
4739 * Remove a device from the pool -
4741 * Removing a device from the vdev namespace requires several steps
4742 * and can take a significant amount of time. As a result we use
4743 * the spa_vdev_config_[enter/exit] functions which allow us to
4744 * grab and release the spa_config_lock while still holding the namespace
4745 * lock. During each step the configuration is synced out.
4749 * Remove a device from the pool. Currently, this supports removing only hot
4750 * spares, slogs, and level 2 ARC devices.
4753 spa_vdev_remove(spa_t
*spa
, uint64_t guid
, boolean_t unspare
)
4756 metaslab_group_t
*mg
;
4757 nvlist_t
**spares
, **l2cache
, *nv
;
4759 uint_t nspares
, nl2cache
;
4761 boolean_t locked
= MUTEX_HELD(&spa_namespace_lock
);
4763 ASSERT(spa_writeable(spa
));
4766 txg
= spa_vdev_enter(spa
);
4768 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4770 if (spa
->spa_spares
.sav_vdevs
!= NULL
&&
4771 nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
4772 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0 &&
4773 (nv
= spa_nvlist_lookup_by_guid(spares
, nspares
, guid
)) != NULL
) {
4775 * Only remove the hot spare if it's not currently in use
4778 if (vd
== NULL
|| unspare
) {
4779 spa_vdev_remove_aux(spa
->spa_spares
.sav_config
,
4780 ZPOOL_CONFIG_SPARES
, spares
, nspares
, nv
);
4781 spa_load_spares(spa
);
4782 spa
->spa_spares
.sav_sync
= B_TRUE
;
4786 } else if (spa
->spa_l2cache
.sav_vdevs
!= NULL
&&
4787 nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
4788 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0 &&
4789 (nv
= spa_nvlist_lookup_by_guid(l2cache
, nl2cache
, guid
)) != NULL
) {
4791 * Cache devices can always be removed.
4793 spa_vdev_remove_aux(spa
->spa_l2cache
.sav_config
,
4794 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
, nv
);
4795 spa_load_l2cache(spa
);
4796 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4797 } else if (vd
!= NULL
&& vd
->vdev_islog
) {
4799 ASSERT(vd
== vd
->vdev_top
);
4802 * XXX - Once we have bp-rewrite this should
4803 * become the common case.
4809 * Stop allocating from this vdev.
4811 metaslab_group_passivate(mg
);
4814 * Wait for the youngest allocations and frees to sync,
4815 * and then wait for the deferral of those frees to finish.
4817 spa_vdev_config_exit(spa
, NULL
,
4818 txg
+ TXG_CONCURRENT_STATES
+ TXG_DEFER_SIZE
, 0, FTAG
);
4821 * Attempt to evacuate the vdev.
4823 error
= spa_vdev_remove_evacuate(spa
, vd
);
4825 txg
= spa_vdev_config_enter(spa
);
4828 * If we couldn't evacuate the vdev, unwind.
4831 metaslab_group_activate(mg
);
4832 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4836 * Clean up the vdev namespace.
4838 spa_vdev_remove_from_namespace(spa
, vd
);
4840 } else if (vd
!= NULL
) {
4842 * Normal vdevs cannot be removed (yet).
4847 * There is no vdev of any kind with the specified guid.
4853 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4859 * Find any device that's done replacing, or a vdev marked 'unspare' that's
4860 * current spared, so we can detach it.
4863 spa_vdev_resilver_done_hunt(vdev_t
*vd
)
4865 vdev_t
*newvd
, *oldvd
;
4868 for (c
= 0; c
< vd
->vdev_children
; c
++) {
4869 oldvd
= spa_vdev_resilver_done_hunt(vd
->vdev_child
[c
]);
4875 * Check for a completed replacement. We always consider the first
4876 * vdev in the list to be the oldest vdev, and the last one to be
4877 * the newest (see spa_vdev_attach() for how that works). In
4878 * the case where the newest vdev is faulted, we will not automatically
4879 * remove it after a resilver completes. This is OK as it will require
4880 * user intervention to determine which disk the admin wishes to keep.
4882 if (vd
->vdev_ops
== &vdev_replacing_ops
) {
4883 ASSERT(vd
->vdev_children
> 1);
4885 newvd
= vd
->vdev_child
[vd
->vdev_children
- 1];
4886 oldvd
= vd
->vdev_child
[0];
4888 if (vdev_dtl_empty(newvd
, DTL_MISSING
) &&
4889 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
4890 !vdev_dtl_required(oldvd
))
4895 * Check for a completed resilver with the 'unspare' flag set.
4897 if (vd
->vdev_ops
== &vdev_spare_ops
) {
4898 vdev_t
*first
= vd
->vdev_child
[0];
4899 vdev_t
*last
= vd
->vdev_child
[vd
->vdev_children
- 1];
4901 if (last
->vdev_unspare
) {
4904 } else if (first
->vdev_unspare
) {
4911 if (oldvd
!= NULL
&&
4912 vdev_dtl_empty(newvd
, DTL_MISSING
) &&
4913 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
4914 !vdev_dtl_required(oldvd
))
4918 * If there are more than two spares attached to a disk,
4919 * and those spares are not required, then we want to
4920 * attempt to free them up now so that they can be used
4921 * by other pools. Once we're back down to a single
4922 * disk+spare, we stop removing them.
4924 if (vd
->vdev_children
> 2) {
4925 newvd
= vd
->vdev_child
[1];
4927 if (newvd
->vdev_isspare
&& last
->vdev_isspare
&&
4928 vdev_dtl_empty(last
, DTL_MISSING
) &&
4929 vdev_dtl_empty(last
, DTL_OUTAGE
) &&
4930 !vdev_dtl_required(newvd
))
4939 spa_vdev_resilver_done(spa_t
*spa
)
4941 vdev_t
*vd
, *pvd
, *ppvd
;
4942 uint64_t guid
, sguid
, pguid
, ppguid
;
4944 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4946 while ((vd
= spa_vdev_resilver_done_hunt(spa
->spa_root_vdev
)) != NULL
) {
4947 pvd
= vd
->vdev_parent
;
4948 ppvd
= pvd
->vdev_parent
;
4949 guid
= vd
->vdev_guid
;
4950 pguid
= pvd
->vdev_guid
;
4951 ppguid
= ppvd
->vdev_guid
;
4954 * If we have just finished replacing a hot spared device, then
4955 * we need to detach the parent's first child (the original hot
4958 if (ppvd
->vdev_ops
== &vdev_spare_ops
&& pvd
->vdev_id
== 0 &&
4959 ppvd
->vdev_children
== 2) {
4960 ASSERT(pvd
->vdev_ops
== &vdev_replacing_ops
);
4961 sguid
= ppvd
->vdev_child
[1]->vdev_guid
;
4963 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4964 if (spa_vdev_detach(spa
, guid
, pguid
, B_TRUE
) != 0)
4966 if (sguid
&& spa_vdev_detach(spa
, sguid
, ppguid
, B_TRUE
) != 0)
4968 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4971 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4975 * Update the stored path or FRU for this vdev.
4978 spa_vdev_set_common(spa_t
*spa
, uint64_t guid
, const char *value
,
4982 boolean_t sync
= B_FALSE
;
4984 ASSERT(spa_writeable(spa
));
4986 spa_vdev_state_enter(spa
, SCL_ALL
);
4988 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
4989 return (spa_vdev_state_exit(spa
, NULL
, ENOENT
));
4991 if (!vd
->vdev_ops
->vdev_op_leaf
)
4992 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
4995 if (strcmp(value
, vd
->vdev_path
) != 0) {
4996 spa_strfree(vd
->vdev_path
);
4997 vd
->vdev_path
= spa_strdup(value
);
5001 if (vd
->vdev_fru
== NULL
) {
5002 vd
->vdev_fru
= spa_strdup(value
);
5004 } else if (strcmp(value
, vd
->vdev_fru
) != 0) {
5005 spa_strfree(vd
->vdev_fru
);
5006 vd
->vdev_fru
= spa_strdup(value
);
5011 return (spa_vdev_state_exit(spa
, sync
? vd
: NULL
, 0));
5015 spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
)
5017 return (spa_vdev_set_common(spa
, guid
, newpath
, B_TRUE
));
5021 spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
)
5023 return (spa_vdev_set_common(spa
, guid
, newfru
, B_FALSE
));
5027 * ==========================================================================
5029 * ==========================================================================
5033 spa_scan_stop(spa_t
*spa
)
5035 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5036 if (dsl_scan_resilvering(spa
->spa_dsl_pool
))
5038 return (dsl_scan_cancel(spa
->spa_dsl_pool
));
5042 spa_scan(spa_t
*spa
, pool_scan_func_t func
)
5044 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5046 if (func
>= POOL_SCAN_FUNCS
|| func
== POOL_SCAN_NONE
)
5050 * If a resilver was requested, but there is no DTL on a
5051 * writeable leaf device, we have nothing to do.
5053 if (func
== POOL_SCAN_RESILVER
&&
5054 !vdev_resilver_needed(spa
->spa_root_vdev
, NULL
, NULL
)) {
5055 spa_async_request(spa
, SPA_ASYNC_RESILVER_DONE
);
5059 return (dsl_scan(spa
->spa_dsl_pool
, func
));
5063 * ==========================================================================
5064 * SPA async task processing
5065 * ==========================================================================
5069 spa_async_remove(spa_t
*spa
, vdev_t
*vd
)
5073 if (vd
->vdev_remove_wanted
) {
5074 vd
->vdev_remove_wanted
= B_FALSE
;
5075 vd
->vdev_delayed_close
= B_FALSE
;
5076 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_REMOVED
, VDEV_AUX_NONE
);
5079 * We want to clear the stats, but we don't want to do a full
5080 * vdev_clear() as that will cause us to throw away
5081 * degraded/faulted state as well as attempt to reopen the
5082 * device, all of which is a waste.
5084 vd
->vdev_stat
.vs_read_errors
= 0;
5085 vd
->vdev_stat
.vs_write_errors
= 0;
5086 vd
->vdev_stat
.vs_checksum_errors
= 0;
5088 vdev_state_dirty(vd
->vdev_top
);
5091 for (c
= 0; c
< vd
->vdev_children
; c
++)
5092 spa_async_remove(spa
, vd
->vdev_child
[c
]);
5096 spa_async_probe(spa_t
*spa
, vdev_t
*vd
)
5100 if (vd
->vdev_probe_wanted
) {
5101 vd
->vdev_probe_wanted
= B_FALSE
;
5102 vdev_reopen(vd
); /* vdev_open() does the actual probe */
5105 for (c
= 0; c
< vd
->vdev_children
; c
++)
5106 spa_async_probe(spa
, vd
->vdev_child
[c
]);
5110 spa_async_autoexpand(spa_t
*spa
, vdev_t
*vd
)
5114 if (!spa
->spa_autoexpand
)
5117 for (c
= 0; c
< vd
->vdev_children
; c
++) {
5118 vdev_t
*cvd
= vd
->vdev_child
[c
];
5119 spa_async_autoexpand(spa
, cvd
);
5122 if (!vd
->vdev_ops
->vdev_op_leaf
|| vd
->vdev_physpath
== NULL
)
5125 spa_event_notify(vd
->vdev_spa
, vd
, FM_EREPORT_ZFS_DEVICE_AUTOEXPAND
);
5129 spa_async_thread(spa_t
*spa
)
5133 ASSERT(spa
->spa_sync_on
);
5135 mutex_enter(&spa
->spa_async_lock
);
5136 tasks
= spa
->spa_async_tasks
;
5137 spa
->spa_async_tasks
= 0;
5138 mutex_exit(&spa
->spa_async_lock
);
5141 * See if the config needs to be updated.
5143 if (tasks
& SPA_ASYNC_CONFIG_UPDATE
) {
5144 uint64_t old_space
, new_space
;
5146 mutex_enter(&spa_namespace_lock
);
5147 old_space
= metaslab_class_get_space(spa_normal_class(spa
));
5148 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
5149 new_space
= metaslab_class_get_space(spa_normal_class(spa
));
5150 mutex_exit(&spa_namespace_lock
);
5153 * If the pool grew as a result of the config update,
5154 * then log an internal history event.
5156 if (new_space
!= old_space
) {
5157 spa_history_log_internal(LOG_POOL_VDEV_ONLINE
,
5159 "pool '%s' size: %llu(+%llu)",
5160 spa_name(spa
), new_space
, new_space
- old_space
);
5165 * See if any devices need to be marked REMOVED.
5167 if (tasks
& SPA_ASYNC_REMOVE
) {
5168 spa_vdev_state_enter(spa
, SCL_NONE
);
5169 spa_async_remove(spa
, spa
->spa_root_vdev
);
5170 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
5171 spa_async_remove(spa
, spa
->spa_l2cache
.sav_vdevs
[i
]);
5172 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
5173 spa_async_remove(spa
, spa
->spa_spares
.sav_vdevs
[i
]);
5174 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5177 if ((tasks
& SPA_ASYNC_AUTOEXPAND
) && !spa_suspended(spa
)) {
5178 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5179 spa_async_autoexpand(spa
, spa
->spa_root_vdev
);
5180 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5184 * See if any devices need to be probed.
5186 if (tasks
& SPA_ASYNC_PROBE
) {
5187 spa_vdev_state_enter(spa
, SCL_NONE
);
5188 spa_async_probe(spa
, spa
->spa_root_vdev
);
5189 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5193 * If any devices are done replacing, detach them.
5195 if (tasks
& SPA_ASYNC_RESILVER_DONE
)
5196 spa_vdev_resilver_done(spa
);
5199 * Kick off a resilver.
5201 if (tasks
& SPA_ASYNC_RESILVER
)
5202 dsl_resilver_restart(spa
->spa_dsl_pool
, 0);
5205 * Let the world know that we're done.
5207 mutex_enter(&spa
->spa_async_lock
);
5208 spa
->spa_async_thread
= NULL
;
5209 cv_broadcast(&spa
->spa_async_cv
);
5210 mutex_exit(&spa
->spa_async_lock
);
5215 spa_async_suspend(spa_t
*spa
)
5217 mutex_enter(&spa
->spa_async_lock
);
5218 spa
->spa_async_suspended
++;
5219 while (spa
->spa_async_thread
!= NULL
)
5220 cv_wait(&spa
->spa_async_cv
, &spa
->spa_async_lock
);
5221 mutex_exit(&spa
->spa_async_lock
);
5225 spa_async_resume(spa_t
*spa
)
5227 mutex_enter(&spa
->spa_async_lock
);
5228 ASSERT(spa
->spa_async_suspended
!= 0);
5229 spa
->spa_async_suspended
--;
5230 mutex_exit(&spa
->spa_async_lock
);
5234 spa_async_dispatch(spa_t
*spa
)
5236 mutex_enter(&spa
->spa_async_lock
);
5237 if (spa
->spa_async_tasks
&& !spa
->spa_async_suspended
&&
5238 spa
->spa_async_thread
== NULL
&&
5239 rootdir
!= NULL
&& !vn_is_readonly(rootdir
))
5240 spa
->spa_async_thread
= thread_create(NULL
, 0,
5241 spa_async_thread
, spa
, 0, &p0
, TS_RUN
, maxclsyspri
);
5242 mutex_exit(&spa
->spa_async_lock
);
5246 spa_async_request(spa_t
*spa
, int task
)
5248 zfs_dbgmsg("spa=%s async request task=%u", spa
->spa_name
, task
);
5249 mutex_enter(&spa
->spa_async_lock
);
5250 spa
->spa_async_tasks
|= task
;
5251 mutex_exit(&spa
->spa_async_lock
);
5255 * ==========================================================================
5256 * SPA syncing routines
5257 * ==========================================================================
5261 bpobj_enqueue_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5264 bpobj_enqueue(bpo
, bp
, tx
);
5269 spa_free_sync_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5273 zio_nowait(zio_free_sync(zio
, zio
->io_spa
, dmu_tx_get_txg(tx
), bp
,
5279 spa_sync_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
*nv
, dmu_tx_t
*tx
)
5281 char *packed
= NULL
;
5286 VERIFY(nvlist_size(nv
, &nvsize
, NV_ENCODE_XDR
) == 0);
5289 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
5290 * information. This avoids the dbuf_will_dirty() path and
5291 * saves us a pre-read to get data we don't actually care about.
5293 bufsize
= P2ROUNDUP(nvsize
, SPA_CONFIG_BLOCKSIZE
);
5294 packed
= vmem_alloc(bufsize
, KM_PUSHPAGE
);
5296 VERIFY(nvlist_pack(nv
, &packed
, &nvsize
, NV_ENCODE_XDR
,
5298 bzero(packed
+ nvsize
, bufsize
- nvsize
);
5300 dmu_write(spa
->spa_meta_objset
, obj
, 0, bufsize
, packed
, tx
);
5302 vmem_free(packed
, bufsize
);
5304 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
5305 dmu_buf_will_dirty(db
, tx
);
5306 *(uint64_t *)db
->db_data
= nvsize
;
5307 dmu_buf_rele(db
, FTAG
);
5311 spa_sync_aux_dev(spa_t
*spa
, spa_aux_vdev_t
*sav
, dmu_tx_t
*tx
,
5312 const char *config
, const char *entry
)
5322 * Update the MOS nvlist describing the list of available devices.
5323 * spa_validate_aux() will have already made sure this nvlist is
5324 * valid and the vdevs are labeled appropriately.
5326 if (sav
->sav_object
== 0) {
5327 sav
->sav_object
= dmu_object_alloc(spa
->spa_meta_objset
,
5328 DMU_OT_PACKED_NVLIST
, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE
,
5329 sizeof (uint64_t), tx
);
5330 VERIFY(zap_update(spa
->spa_meta_objset
,
5331 DMU_POOL_DIRECTORY_OBJECT
, entry
, sizeof (uint64_t), 1,
5332 &sav
->sav_object
, tx
) == 0);
5335 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_PUSHPAGE
) == 0);
5336 if (sav
->sav_count
== 0) {
5337 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, NULL
, 0) == 0);
5339 list
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_PUSHPAGE
);
5340 for (i
= 0; i
< sav
->sav_count
; i
++)
5341 list
[i
] = vdev_config_generate(spa
, sav
->sav_vdevs
[i
],
5342 B_FALSE
, VDEV_CONFIG_L2CACHE
);
5343 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, list
,
5344 sav
->sav_count
) == 0);
5345 for (i
= 0; i
< sav
->sav_count
; i
++)
5346 nvlist_free(list
[i
]);
5347 kmem_free(list
, sav
->sav_count
* sizeof (void *));
5350 spa_sync_nvlist(spa
, sav
->sav_object
, nvroot
, tx
);
5351 nvlist_free(nvroot
);
5353 sav
->sav_sync
= B_FALSE
;
5357 spa_sync_config_object(spa_t
*spa
, dmu_tx_t
*tx
)
5361 if (list_is_empty(&spa
->spa_config_dirty_list
))
5364 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5366 config
= spa_config_generate(spa
, spa
->spa_root_vdev
,
5367 dmu_tx_get_txg(tx
), B_FALSE
);
5369 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5371 if (spa
->spa_config_syncing
)
5372 nvlist_free(spa
->spa_config_syncing
);
5373 spa
->spa_config_syncing
= config
;
5375 spa_sync_nvlist(spa
, spa
->spa_config_object
, config
, tx
);
5379 * Set zpool properties.
5382 spa_sync_props(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
5385 objset_t
*mos
= spa
->spa_meta_objset
;
5386 nvlist_t
*nvp
= arg2
;
5391 const char *propname
;
5392 zprop_type_t proptype
;
5394 mutex_enter(&spa
->spa_props_lock
);
5397 while ((elem
= nvlist_next_nvpair(nvp
, elem
))) {
5398 switch (prop
= zpool_name_to_prop(nvpair_name(elem
))) {
5399 case ZPOOL_PROP_VERSION
:
5401 * Only set version for non-zpool-creation cases
5402 * (set/import). spa_create() needs special care
5403 * for version setting.
5405 if (tx
->tx_txg
!= TXG_INITIAL
) {
5406 VERIFY(nvpair_value_uint64(elem
,
5408 ASSERT(intval
<= SPA_VERSION
);
5409 ASSERT(intval
>= spa_version(spa
));
5410 spa
->spa_uberblock
.ub_version
= intval
;
5411 vdev_config_dirty(spa
->spa_root_vdev
);
5415 case ZPOOL_PROP_ALTROOT
:
5417 * 'altroot' is a non-persistent property. It should
5418 * have been set temporarily at creation or import time.
5420 ASSERT(spa
->spa_root
!= NULL
);
5423 case ZPOOL_PROP_READONLY
:
5424 case ZPOOL_PROP_CACHEFILE
:
5426 * 'readonly' and 'cachefile' are also non-persisitent
5430 case ZPOOL_PROP_COMMENT
:
5431 VERIFY(nvpair_value_string(elem
, &strval
) == 0);
5432 if (spa
->spa_comment
!= NULL
)
5433 spa_strfree(spa
->spa_comment
);
5434 spa
->spa_comment
= spa_strdup(strval
);
5436 * We need to dirty the configuration on all the vdevs
5437 * so that their labels get updated. It's unnecessary
5438 * to do this for pool creation since the vdev's
5439 * configuratoin has already been dirtied.
5441 if (tx
->tx_txg
!= TXG_INITIAL
)
5442 vdev_config_dirty(spa
->spa_root_vdev
);
5446 * Set pool property values in the poolprops mos object.
5448 if (spa
->spa_pool_props_object
== 0) {
5449 VERIFY((spa
->spa_pool_props_object
=
5450 zap_create(mos
, DMU_OT_POOL_PROPS
,
5451 DMU_OT_NONE
, 0, tx
)) > 0);
5453 VERIFY(zap_update(mos
,
5454 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_PROPS
,
5455 8, 1, &spa
->spa_pool_props_object
, tx
)
5459 /* normalize the property name */
5460 propname
= zpool_prop_to_name(prop
);
5461 proptype
= zpool_prop_get_type(prop
);
5463 if (nvpair_type(elem
) == DATA_TYPE_STRING
) {
5464 ASSERT(proptype
== PROP_TYPE_STRING
);
5465 VERIFY(nvpair_value_string(elem
, &strval
) == 0);
5466 VERIFY(zap_update(mos
,
5467 spa
->spa_pool_props_object
, propname
,
5468 1, strlen(strval
) + 1, strval
, tx
) == 0);
5470 } else if (nvpair_type(elem
) == DATA_TYPE_UINT64
) {
5471 VERIFY(nvpair_value_uint64(elem
, &intval
) == 0);
5473 if (proptype
== PROP_TYPE_INDEX
) {
5475 VERIFY(zpool_prop_index_to_string(
5476 prop
, intval
, &unused
) == 0);
5478 VERIFY(zap_update(mos
,
5479 spa
->spa_pool_props_object
, propname
,
5480 8, 1, &intval
, tx
) == 0);
5482 ASSERT(0); /* not allowed */
5486 case ZPOOL_PROP_DELEGATION
:
5487 spa
->spa_delegation
= intval
;
5489 case ZPOOL_PROP_BOOTFS
:
5490 spa
->spa_bootfs
= intval
;
5492 case ZPOOL_PROP_FAILUREMODE
:
5493 spa
->spa_failmode
= intval
;
5495 case ZPOOL_PROP_AUTOEXPAND
:
5496 spa
->spa_autoexpand
= intval
;
5497 if (tx
->tx_txg
!= TXG_INITIAL
)
5498 spa_async_request(spa
,
5499 SPA_ASYNC_AUTOEXPAND
);
5501 case ZPOOL_PROP_DEDUPDITTO
:
5502 spa
->spa_dedup_ditto
= intval
;
5509 /* log internal history if this is not a zpool create */
5510 if (spa_version(spa
) >= SPA_VERSION_ZPOOL_HISTORY
&&
5511 tx
->tx_txg
!= TXG_INITIAL
) {
5512 spa_history_log_internal(LOG_POOL_PROPSET
,
5513 spa
, tx
, "%s %lld %s",
5514 nvpair_name(elem
), intval
, spa_name(spa
));
5518 mutex_exit(&spa
->spa_props_lock
);
5522 * Perform one-time upgrade on-disk changes. spa_version() does not
5523 * reflect the new version this txg, so there must be no changes this
5524 * txg to anything that the upgrade code depends on after it executes.
5525 * Therefore this must be called after dsl_pool_sync() does the sync
5529 spa_sync_upgrades(spa_t
*spa
, dmu_tx_t
*tx
)
5531 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5533 ASSERT(spa
->spa_sync_pass
== 1);
5535 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_ORIGIN
&&
5536 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_ORIGIN
) {
5537 dsl_pool_create_origin(dp
, tx
);
5539 /* Keeping the origin open increases spa_minref */
5540 spa
->spa_minref
+= 3;
5543 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_NEXT_CLONES
&&
5544 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_NEXT_CLONES
) {
5545 dsl_pool_upgrade_clones(dp
, tx
);
5548 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_DIR_CLONES
&&
5549 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_DIR_CLONES
) {
5550 dsl_pool_upgrade_dir_clones(dp
, tx
);
5552 /* Keeping the freedir open increases spa_minref */
5553 spa
->spa_minref
+= 3;
5558 * Sync the specified transaction group. New blocks may be dirtied as
5559 * part of the process, so we iterate until it converges.
5562 spa_sync(spa_t
*spa
, uint64_t txg
)
5564 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5565 objset_t
*mos
= spa
->spa_meta_objset
;
5566 bpobj_t
*defer_bpo
= &spa
->spa_deferred_bpobj
;
5567 bplist_t
*free_bpl
= &spa
->spa_free_bplist
[txg
& TXG_MASK
];
5568 vdev_t
*rvd
= spa
->spa_root_vdev
;
5574 VERIFY(spa_writeable(spa
));
5577 * Lock out configuration changes.
5579 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5581 spa
->spa_syncing_txg
= txg
;
5582 spa
->spa_sync_pass
= 0;
5585 * If there are any pending vdev state changes, convert them
5586 * into config changes that go out with this transaction group.
5588 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5589 while (list_head(&spa
->spa_state_dirty_list
) != NULL
) {
5591 * We need the write lock here because, for aux vdevs,
5592 * calling vdev_config_dirty() modifies sav_config.
5593 * This is ugly and will become unnecessary when we
5594 * eliminate the aux vdev wart by integrating all vdevs
5595 * into the root vdev tree.
5597 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5598 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_WRITER
);
5599 while ((vd
= list_head(&spa
->spa_state_dirty_list
)) != NULL
) {
5600 vdev_state_clean(vd
);
5601 vdev_config_dirty(vd
);
5603 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5604 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_READER
);
5606 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5608 tx
= dmu_tx_create_assigned(dp
, txg
);
5611 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
5612 * set spa_deflate if we have no raid-z vdevs.
5614 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_RAIDZ_DEFLATE
&&
5615 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
5618 for (i
= 0; i
< rvd
->vdev_children
; i
++) {
5619 vd
= rvd
->vdev_child
[i
];
5620 if (vd
->vdev_deflate_ratio
!= SPA_MINBLOCKSIZE
)
5623 if (i
== rvd
->vdev_children
) {
5624 spa
->spa_deflate
= TRUE
;
5625 VERIFY(0 == zap_add(spa
->spa_meta_objset
,
5626 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
5627 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
));
5632 * If anything has changed in this txg, or if someone is waiting
5633 * for this txg to sync (eg, spa_vdev_remove()), push the
5634 * deferred frees from the previous txg. If not, leave them
5635 * alone so that we don't generate work on an otherwise idle
5638 if (!txg_list_empty(&dp
->dp_dirty_datasets
, txg
) ||
5639 !txg_list_empty(&dp
->dp_dirty_dirs
, txg
) ||
5640 !txg_list_empty(&dp
->dp_sync_tasks
, txg
) ||
5641 ((dsl_scan_active(dp
->dp_scan
) ||
5642 txg_sync_waiting(dp
)) && !spa_shutting_down(spa
))) {
5643 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
5644 VERIFY3U(bpobj_iterate(defer_bpo
,
5645 spa_free_sync_cb
, zio
, tx
), ==, 0);
5646 VERIFY3U(zio_wait(zio
), ==, 0);
5650 * Iterate to convergence.
5653 int pass
= ++spa
->spa_sync_pass
;
5655 spa_sync_config_object(spa
, tx
);
5656 spa_sync_aux_dev(spa
, &spa
->spa_spares
, tx
,
5657 ZPOOL_CONFIG_SPARES
, DMU_POOL_SPARES
);
5658 spa_sync_aux_dev(spa
, &spa
->spa_l2cache
, tx
,
5659 ZPOOL_CONFIG_L2CACHE
, DMU_POOL_L2CACHE
);
5660 spa_errlog_sync(spa
, txg
);
5661 dsl_pool_sync(dp
, txg
);
5663 if (pass
<= SYNC_PASS_DEFERRED_FREE
) {
5664 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
5665 bplist_iterate(free_bpl
, spa_free_sync_cb
,
5667 VERIFY(zio_wait(zio
) == 0);
5669 bplist_iterate(free_bpl
, bpobj_enqueue_cb
,
5674 dsl_scan_sync(dp
, tx
);
5676 while ((vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, txg
)))
5680 spa_sync_upgrades(spa
, tx
);
5682 } while (dmu_objset_is_dirty(mos
, txg
));
5685 * Rewrite the vdev configuration (which includes the uberblock)
5686 * to commit the transaction group.
5688 * If there are no dirty vdevs, we sync the uberblock to a few
5689 * random top-level vdevs that are known to be visible in the
5690 * config cache (see spa_vdev_add() for a complete description).
5691 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
5695 * We hold SCL_STATE to prevent vdev open/close/etc.
5696 * while we're attempting to write the vdev labels.
5698 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5700 if (list_is_empty(&spa
->spa_config_dirty_list
)) {
5701 vdev_t
*svd
[SPA_DVAS_PER_BP
];
5703 int children
= rvd
->vdev_children
;
5704 int c0
= spa_get_random(children
);
5706 for (c
= 0; c
< children
; c
++) {
5707 vd
= rvd
->vdev_child
[(c0
+ c
) % children
];
5708 if (vd
->vdev_ms_array
== 0 || vd
->vdev_islog
)
5710 svd
[svdcount
++] = vd
;
5711 if (svdcount
== SPA_DVAS_PER_BP
)
5714 error
= vdev_config_sync(svd
, svdcount
, txg
, B_FALSE
);
5716 error
= vdev_config_sync(svd
, svdcount
, txg
,
5719 error
= vdev_config_sync(rvd
->vdev_child
,
5720 rvd
->vdev_children
, txg
, B_FALSE
);
5722 error
= vdev_config_sync(rvd
->vdev_child
,
5723 rvd
->vdev_children
, txg
, B_TRUE
);
5726 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5730 zio_suspend(spa
, NULL
);
5731 zio_resume_wait(spa
);
5736 * Clear the dirty config list.
5738 while ((vd
= list_head(&spa
->spa_config_dirty_list
)) != NULL
)
5739 vdev_config_clean(vd
);
5742 * Now that the new config has synced transactionally,
5743 * let it become visible to the config cache.
5745 if (spa
->spa_config_syncing
!= NULL
) {
5746 spa_config_set(spa
, spa
->spa_config_syncing
);
5747 spa
->spa_config_txg
= txg
;
5748 spa
->spa_config_syncing
= NULL
;
5751 spa
->spa_ubsync
= spa
->spa_uberblock
;
5753 dsl_pool_sync_done(dp
, txg
);
5756 * Update usable space statistics.
5758 while ((vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, TXG_CLEAN(txg
))))
5759 vdev_sync_done(vd
, txg
);
5761 spa_update_dspace(spa
);
5764 * It had better be the case that we didn't dirty anything
5765 * since vdev_config_sync().
5767 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
, txg
));
5768 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
5769 ASSERT(txg_list_empty(&spa
->spa_vdev_txg_list
, txg
));
5771 spa
->spa_sync_pass
= 0;
5773 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5775 spa_handle_ignored_writes(spa
);
5778 * If any async tasks have been requested, kick them off.
5780 spa_async_dispatch(spa
);
5784 * Sync all pools. We don't want to hold the namespace lock across these
5785 * operations, so we take a reference on the spa_t and drop the lock during the
5789 spa_sync_allpools(void)
5792 mutex_enter(&spa_namespace_lock
);
5793 while ((spa
= spa_next(spa
)) != NULL
) {
5794 if (spa_state(spa
) != POOL_STATE_ACTIVE
||
5795 !spa_writeable(spa
) || spa_suspended(spa
))
5797 spa_open_ref(spa
, FTAG
);
5798 mutex_exit(&spa_namespace_lock
);
5799 txg_wait_synced(spa_get_dsl(spa
), 0);
5800 mutex_enter(&spa_namespace_lock
);
5801 spa_close(spa
, FTAG
);
5803 mutex_exit(&spa_namespace_lock
);
5807 * ==========================================================================
5808 * Miscellaneous routines
5809 * ==========================================================================
5813 * Remove all pools in the system.
5821 * Remove all cached state. All pools should be closed now,
5822 * so every spa in the AVL tree should be unreferenced.
5824 mutex_enter(&spa_namespace_lock
);
5825 while ((spa
= spa_next(NULL
)) != NULL
) {
5827 * Stop async tasks. The async thread may need to detach
5828 * a device that's been replaced, which requires grabbing
5829 * spa_namespace_lock, so we must drop it here.
5831 spa_open_ref(spa
, FTAG
);
5832 mutex_exit(&spa_namespace_lock
);
5833 spa_async_suspend(spa
);
5834 mutex_enter(&spa_namespace_lock
);
5835 spa_close(spa
, FTAG
);
5837 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
5839 spa_deactivate(spa
);
5843 mutex_exit(&spa_namespace_lock
);
5847 spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
, boolean_t aux
)
5852 if ((vd
= vdev_lookup_by_guid(spa
->spa_root_vdev
, guid
)) != NULL
)
5856 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
5857 vd
= spa
->spa_l2cache
.sav_vdevs
[i
];
5858 if (vd
->vdev_guid
== guid
)
5862 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
5863 vd
= spa
->spa_spares
.sav_vdevs
[i
];
5864 if (vd
->vdev_guid
== guid
)
5873 spa_upgrade(spa_t
*spa
, uint64_t version
)
5875 ASSERT(spa_writeable(spa
));
5877 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5880 * This should only be called for a non-faulted pool, and since a
5881 * future version would result in an unopenable pool, this shouldn't be
5884 ASSERT(spa
->spa_uberblock
.ub_version
<= SPA_VERSION
);
5885 ASSERT(version
>= spa
->spa_uberblock
.ub_version
);
5887 spa
->spa_uberblock
.ub_version
= version
;
5888 vdev_config_dirty(spa
->spa_root_vdev
);
5890 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5892 txg_wait_synced(spa_get_dsl(spa
), 0);
5896 spa_has_spare(spa_t
*spa
, uint64_t guid
)
5900 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
5902 for (i
= 0; i
< sav
->sav_count
; i
++)
5903 if (sav
->sav_vdevs
[i
]->vdev_guid
== guid
)
5906 for (i
= 0; i
< sav
->sav_npending
; i
++) {
5907 if (nvlist_lookup_uint64(sav
->sav_pending
[i
], ZPOOL_CONFIG_GUID
,
5908 &spareguid
) == 0 && spareguid
== guid
)
5916 * Check if a pool has an active shared spare device.
5917 * Note: reference count of an active spare is 2, as a spare and as a replace
5920 spa_has_active_shared_spare(spa_t
*spa
)
5924 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
5926 for (i
= 0; i
< sav
->sav_count
; i
++) {
5927 if (spa_spare_exists(sav
->sav_vdevs
[i
]->vdev_guid
, &pool
,
5928 &refcnt
) && pool
!= 0ULL && pool
== spa_guid(spa
) &&
5937 * Post a FM_EREPORT_ZFS_* event from sys/fm/fs/zfs.h. The payload will be
5938 * filled in from the spa and (optionally) the vdev. This doesn't do anything
5939 * in the userland libzpool, as we don't want consumers to misinterpret ztest
5940 * or zdb as real changes.
5943 spa_event_notify(spa_t
*spa
, vdev_t
*vd
, const char *name
)
5946 zfs_ereport_post(name
, spa
, vd
, NULL
, 0, 0);
5950 #if defined(_KERNEL) && defined(HAVE_SPL)
5951 /* state manipulation functions */
5952 EXPORT_SYMBOL(spa_open
);
5953 EXPORT_SYMBOL(spa_open_rewind
);
5954 EXPORT_SYMBOL(spa_get_stats
);
5955 EXPORT_SYMBOL(spa_create
);
5956 EXPORT_SYMBOL(spa_import_rootpool
);
5957 EXPORT_SYMBOL(spa_import
);
5958 EXPORT_SYMBOL(spa_tryimport
);
5959 EXPORT_SYMBOL(spa_destroy
);
5960 EXPORT_SYMBOL(spa_export
);
5961 EXPORT_SYMBOL(spa_reset
);
5962 EXPORT_SYMBOL(spa_async_request
);
5963 EXPORT_SYMBOL(spa_async_suspend
);
5964 EXPORT_SYMBOL(spa_async_resume
);
5965 EXPORT_SYMBOL(spa_inject_addref
);
5966 EXPORT_SYMBOL(spa_inject_delref
);
5967 EXPORT_SYMBOL(spa_scan_stat_init
);
5968 EXPORT_SYMBOL(spa_scan_get_stats
);
5970 /* device maniion */
5971 EXPORT_SYMBOL(spa_vdev_add
);
5972 EXPORT_SYMBOL(spa_vdev_attach
);
5973 EXPORT_SYMBOL(spa_vdev_detach
);
5974 EXPORT_SYMBOL(spa_vdev_remove
);
5975 EXPORT_SYMBOL(spa_vdev_setpath
);
5976 EXPORT_SYMBOL(spa_vdev_setfru
);
5977 EXPORT_SYMBOL(spa_vdev_split_mirror
);
5979 /* spare statech is global across all pools) */
5980 EXPORT_SYMBOL(spa_spare_add
);
5981 EXPORT_SYMBOL(spa_spare_remove
);
5982 EXPORT_SYMBOL(spa_spare_exists
);
5983 EXPORT_SYMBOL(spa_spare_activate
);
5985 /* L2ARC statech is global across all pools) */
5986 EXPORT_SYMBOL(spa_l2cache_add
);
5987 EXPORT_SYMBOL(spa_l2cache_remove
);
5988 EXPORT_SYMBOL(spa_l2cache_exists
);
5989 EXPORT_SYMBOL(spa_l2cache_activate
);
5990 EXPORT_SYMBOL(spa_l2cache_drop
);
5993 EXPORT_SYMBOL(spa_scan
);
5994 EXPORT_SYMBOL(spa_scan_stop
);
5997 EXPORT_SYMBOL(spa_sync
); /* only for DMU use */
5998 EXPORT_SYMBOL(spa_sync_allpools
);
6001 EXPORT_SYMBOL(spa_prop_set
);
6002 EXPORT_SYMBOL(spa_prop_get
);
6003 EXPORT_SYMBOL(spa_prop_clear_bootfs
);
6005 /* asynchronous event notification */
6006 EXPORT_SYMBOL(spa_event_notify
);