4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 * Copyright (c) 2012 by Delphix. All rights reserved.
29 * This file contains all the routines used when modifying on-disk SPA state.
30 * This includes opening, importing, destroying, exporting a pool, and syncing a
34 #include <sys/zfs_context.h>
35 #include <sys/fm/fs/zfs.h>
36 #include <sys/spa_impl.h>
38 #include <sys/zio_checksum.h>
40 #include <sys/dmu_tx.h>
44 #include <sys/vdev_impl.h>
45 #include <sys/metaslab.h>
46 #include <sys/metaslab_impl.h>
47 #include <sys/uberblock_impl.h>
50 #include <sys/dmu_traverse.h>
51 #include <sys/dmu_objset.h>
52 #include <sys/unique.h>
53 #include <sys/dsl_pool.h>
54 #include <sys/dsl_dataset.h>
55 #include <sys/dsl_dir.h>
56 #include <sys/dsl_prop.h>
57 #include <sys/dsl_synctask.h>
58 #include <sys/fs/zfs.h>
60 #include <sys/callb.h>
61 #include <sys/systeminfo.h>
62 #include <sys/spa_boot.h>
63 #include <sys/zfs_ioctl.h>
64 #include <sys/dsl_scan.h>
65 #include <sys/zfeature.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 "issue", "issue_high", "intr", "intr_high"
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(8), ZTI_FIX(5) },
112 { ZTI_FIX(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_version
;
118 static dsl_syncfunc_t spa_sync_props
;
119 static dsl_checkfunc_t spa_change_guid_check
;
120 static dsl_syncfunc_t spa_change_guid_sync
;
121 static boolean_t
spa_has_active_shared_spare(spa_t
*spa
);
122 static int spa_load_impl(spa_t
*spa
, uint64_t, nvlist_t
*config
,
123 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
125 static void spa_vdev_resilver_done(spa_t
*spa
);
127 uint_t zio_taskq_batch_pct
= 100; /* 1 thread per cpu in pset */
128 id_t zio_taskq_psrset_bind
= PS_NONE
;
129 boolean_t zio_taskq_sysdc
= B_TRUE
; /* use SDC scheduling class */
130 uint_t zio_taskq_basedc
= 80; /* base duty cycle */
132 boolean_t spa_create_process
= B_TRUE
; /* no process ==> no sysdc */
133 extern int zfs_sync_pass_deferred_free
;
136 * This (illegal) pool name is used when temporarily importing a spa_t in order
137 * to get the vdev stats associated with the imported devices.
139 #define TRYIMPORT_NAME "$import"
142 * ==========================================================================
143 * SPA properties routines
144 * ==========================================================================
148 * Add a (source=src, propname=propval) list to an nvlist.
151 spa_prop_add_list(nvlist_t
*nvl
, zpool_prop_t prop
, char *strval
,
152 uint64_t intval
, zprop_source_t src
)
154 const char *propname
= zpool_prop_to_name(prop
);
157 VERIFY(nvlist_alloc(&propval
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
158 VERIFY(nvlist_add_uint64(propval
, ZPROP_SOURCE
, src
) == 0);
161 VERIFY(nvlist_add_string(propval
, ZPROP_VALUE
, strval
) == 0);
163 VERIFY(nvlist_add_uint64(propval
, ZPROP_VALUE
, intval
) == 0);
165 VERIFY(nvlist_add_nvlist(nvl
, propname
, propval
) == 0);
166 nvlist_free(propval
);
170 * Get property values from the spa configuration.
173 spa_prop_get_config(spa_t
*spa
, nvlist_t
**nvp
)
175 vdev_t
*rvd
= spa
->spa_root_vdev
;
176 dsl_pool_t
*pool
= spa
->spa_dsl_pool
;
180 uint64_t cap
, version
;
181 zprop_source_t src
= ZPROP_SRC_NONE
;
182 spa_config_dirent_t
*dp
;
184 ASSERT(MUTEX_HELD(&spa
->spa_props_lock
));
187 alloc
= metaslab_class_get_alloc(spa_normal_class(spa
));
188 size
= metaslab_class_get_space(spa_normal_class(spa
));
189 spa_prop_add_list(*nvp
, ZPOOL_PROP_NAME
, spa_name(spa
), 0, src
);
190 spa_prop_add_list(*nvp
, ZPOOL_PROP_SIZE
, NULL
, size
, src
);
191 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALLOCATED
, NULL
, alloc
, src
);
192 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREE
, NULL
,
196 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
197 vdev_t
*tvd
= rvd
->vdev_child
[c
];
198 space
+= tvd
->vdev_max_asize
- tvd
->vdev_asize
;
200 spa_prop_add_list(*nvp
, ZPOOL_PROP_EXPANDSZ
, NULL
, space
,
203 spa_prop_add_list(*nvp
, ZPOOL_PROP_READONLY
, NULL
,
204 (spa_mode(spa
) == FREAD
), src
);
206 cap
= (size
== 0) ? 0 : (alloc
* 100 / size
);
207 spa_prop_add_list(*nvp
, ZPOOL_PROP_CAPACITY
, NULL
, cap
, src
);
209 spa_prop_add_list(*nvp
, ZPOOL_PROP_DEDUPRATIO
, NULL
,
210 ddt_get_pool_dedup_ratio(spa
), src
);
212 spa_prop_add_list(*nvp
, ZPOOL_PROP_HEALTH
, NULL
,
213 rvd
->vdev_state
, src
);
215 version
= spa_version(spa
);
216 if (version
== zpool_prop_default_numeric(ZPOOL_PROP_VERSION
))
217 src
= ZPROP_SRC_DEFAULT
;
219 src
= ZPROP_SRC_LOCAL
;
220 spa_prop_add_list(*nvp
, ZPOOL_PROP_VERSION
, NULL
, version
, src
);
224 dsl_dir_t
*freedir
= pool
->dp_free_dir
;
227 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS,
228 * when opening pools before this version freedir will be NULL.
230 if (freedir
!= NULL
) {
231 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREEING
, NULL
,
232 freedir
->dd_phys
->dd_used_bytes
, src
);
234 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREEING
,
239 spa_prop_add_list(*nvp
, ZPOOL_PROP_GUID
, NULL
, spa_guid(spa
), src
);
241 if (spa
->spa_comment
!= NULL
) {
242 spa_prop_add_list(*nvp
, ZPOOL_PROP_COMMENT
, spa
->spa_comment
,
246 if (spa
->spa_root
!= NULL
)
247 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALTROOT
, spa
->spa_root
,
250 if ((dp
= list_head(&spa
->spa_config_list
)) != NULL
) {
251 if (dp
->scd_path
== NULL
) {
252 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
253 "none", 0, ZPROP_SRC_LOCAL
);
254 } else if (strcmp(dp
->scd_path
, spa_config_path
) != 0) {
255 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
256 dp
->scd_path
, 0, ZPROP_SRC_LOCAL
);
262 * Get zpool property values.
265 spa_prop_get(spa_t
*spa
, nvlist_t
**nvp
)
267 objset_t
*mos
= spa
->spa_meta_objset
;
272 VERIFY(nvlist_alloc(nvp
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
274 mutex_enter(&spa
->spa_props_lock
);
277 * Get properties from the spa config.
279 spa_prop_get_config(spa
, nvp
);
281 /* If no pool property object, no more prop to get. */
282 if (mos
== NULL
|| spa
->spa_pool_props_object
== 0) {
283 mutex_exit(&spa
->spa_props_lock
);
288 * Get properties from the MOS pool property object.
290 for (zap_cursor_init(&zc
, mos
, spa
->spa_pool_props_object
);
291 (err
= zap_cursor_retrieve(&zc
, &za
)) == 0;
292 zap_cursor_advance(&zc
)) {
295 zprop_source_t src
= ZPROP_SRC_DEFAULT
;
298 if ((prop
= zpool_name_to_prop(za
.za_name
)) == ZPROP_INVAL
)
301 switch (za
.za_integer_length
) {
303 /* integer property */
304 if (za
.za_first_integer
!=
305 zpool_prop_default_numeric(prop
))
306 src
= ZPROP_SRC_LOCAL
;
308 if (prop
== ZPOOL_PROP_BOOTFS
) {
310 dsl_dataset_t
*ds
= NULL
;
312 dp
= spa_get_dsl(spa
);
313 rw_enter(&dp
->dp_config_rwlock
, RW_READER
);
314 if (err
= dsl_dataset_hold_obj(dp
,
315 za
.za_first_integer
, FTAG
, &ds
)) {
316 rw_exit(&dp
->dp_config_rwlock
);
321 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1,
323 dsl_dataset_name(ds
, strval
);
324 dsl_dataset_rele(ds
, FTAG
);
325 rw_exit(&dp
->dp_config_rwlock
);
328 intval
= za
.za_first_integer
;
331 spa_prop_add_list(*nvp
, prop
, strval
, intval
, src
);
335 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1);
340 /* string property */
341 strval
= kmem_alloc(za
.za_num_integers
, KM_SLEEP
);
342 err
= zap_lookup(mos
, spa
->spa_pool_props_object
,
343 za
.za_name
, 1, za
.za_num_integers
, strval
);
345 kmem_free(strval
, za
.za_num_integers
);
348 spa_prop_add_list(*nvp
, prop
, strval
, 0, src
);
349 kmem_free(strval
, za
.za_num_integers
);
356 zap_cursor_fini(&zc
);
357 mutex_exit(&spa
->spa_props_lock
);
359 if (err
&& err
!= ENOENT
) {
369 * Validate the given pool properties nvlist and modify the list
370 * for the property values to be set.
373 spa_prop_validate(spa_t
*spa
, nvlist_t
*props
)
376 int error
= 0, reset_bootfs
= 0;
378 boolean_t has_feature
= B_FALSE
;
381 while ((elem
= nvlist_next_nvpair(props
, elem
)) != NULL
) {
383 char *strval
, *slash
, *check
, *fname
;
384 const char *propname
= nvpair_name(elem
);
385 zpool_prop_t prop
= zpool_name_to_prop(propname
);
389 if (!zpool_prop_feature(propname
)) {
395 * Sanitize the input.
397 if (nvpair_type(elem
) != DATA_TYPE_UINT64
) {
402 if (nvpair_value_uint64(elem
, &intval
) != 0) {
412 fname
= strchr(propname
, '@') + 1;
413 if (zfeature_lookup_name(fname
, NULL
) != 0) {
418 has_feature
= B_TRUE
;
421 case ZPOOL_PROP_VERSION
:
422 error
= nvpair_value_uint64(elem
, &intval
);
424 (intval
< spa_version(spa
) ||
425 intval
> SPA_VERSION_BEFORE_FEATURES
||
430 case ZPOOL_PROP_DELEGATION
:
431 case ZPOOL_PROP_AUTOREPLACE
:
432 case ZPOOL_PROP_LISTSNAPS
:
433 case ZPOOL_PROP_AUTOEXPAND
:
434 error
= nvpair_value_uint64(elem
, &intval
);
435 if (!error
&& intval
> 1)
439 case ZPOOL_PROP_BOOTFS
:
441 * If the pool version is less than SPA_VERSION_BOOTFS,
442 * or the pool is still being created (version == 0),
443 * the bootfs property cannot be set.
445 if (spa_version(spa
) < SPA_VERSION_BOOTFS
) {
451 * Make sure the vdev config is bootable
453 if (!vdev_is_bootable(spa
->spa_root_vdev
)) {
460 error
= nvpair_value_string(elem
, &strval
);
466 if (strval
== NULL
|| strval
[0] == '\0') {
467 objnum
= zpool_prop_default_numeric(
472 if (error
= dmu_objset_hold(strval
, FTAG
, &os
))
475 /* Must be ZPL and not gzip compressed. */
477 if (dmu_objset_type(os
) != DMU_OST_ZFS
) {
479 } else if ((error
= dsl_prop_get_integer(strval
,
480 zfs_prop_to_name(ZFS_PROP_COMPRESSION
),
481 &compress
, NULL
)) == 0 &&
482 !BOOTFS_COMPRESS_VALID(compress
)) {
485 objnum
= dmu_objset_id(os
);
487 dmu_objset_rele(os
, FTAG
);
491 case ZPOOL_PROP_FAILUREMODE
:
492 error
= nvpair_value_uint64(elem
, &intval
);
493 if (!error
&& (intval
< ZIO_FAILURE_MODE_WAIT
||
494 intval
> ZIO_FAILURE_MODE_PANIC
))
498 * This is a special case which only occurs when
499 * the pool has completely failed. This allows
500 * the user to change the in-core failmode property
501 * without syncing it out to disk (I/Os might
502 * currently be blocked). We do this by returning
503 * EIO to the caller (spa_prop_set) to trick it
504 * into thinking we encountered a property validation
507 if (!error
&& spa_suspended(spa
)) {
508 spa
->spa_failmode
= intval
;
513 case ZPOOL_PROP_CACHEFILE
:
514 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
517 if (strval
[0] == '\0')
520 if (strcmp(strval
, "none") == 0)
523 if (strval
[0] != '/') {
528 slash
= strrchr(strval
, '/');
529 ASSERT(slash
!= NULL
);
531 if (slash
[1] == '\0' || strcmp(slash
, "/.") == 0 ||
532 strcmp(slash
, "/..") == 0)
536 case ZPOOL_PROP_COMMENT
:
537 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
539 for (check
= strval
; *check
!= '\0'; check
++) {
541 * The kernel doesn't have an easy isprint()
542 * check. For this kernel check, we merely
543 * check ASCII apart from DEL. Fix this if
544 * there is an easy-to-use kernel isprint().
546 if (*check
>= 0x7f) {
552 if (strlen(strval
) > ZPROP_MAX_COMMENT
)
556 case ZPOOL_PROP_DEDUPDITTO
:
557 if (spa_version(spa
) < SPA_VERSION_DEDUP
)
560 error
= nvpair_value_uint64(elem
, &intval
);
562 intval
!= 0 && intval
< ZIO_DEDUPDITTO_MIN
)
571 if (!error
&& reset_bootfs
) {
572 error
= nvlist_remove(props
,
573 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), DATA_TYPE_STRING
);
576 error
= nvlist_add_uint64(props
,
577 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), objnum
);
585 spa_configfile_set(spa_t
*spa
, nvlist_t
*nvp
, boolean_t need_sync
)
588 spa_config_dirent_t
*dp
;
590 if (nvlist_lookup_string(nvp
, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE
),
594 dp
= kmem_alloc(sizeof (spa_config_dirent_t
),
597 if (cachefile
[0] == '\0')
598 dp
->scd_path
= spa_strdup(spa_config_path
);
599 else if (strcmp(cachefile
, "none") == 0)
602 dp
->scd_path
= spa_strdup(cachefile
);
604 list_insert_head(&spa
->spa_config_list
, dp
);
606 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
610 spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
)
613 nvpair_t
*elem
= NULL
;
614 boolean_t need_sync
= B_FALSE
;
616 if ((error
= spa_prop_validate(spa
, nvp
)) != 0)
619 while ((elem
= nvlist_next_nvpair(nvp
, elem
)) != NULL
) {
620 zpool_prop_t prop
= zpool_name_to_prop(nvpair_name(elem
));
622 if (prop
== ZPOOL_PROP_CACHEFILE
||
623 prop
== ZPOOL_PROP_ALTROOT
||
624 prop
== ZPOOL_PROP_READONLY
)
627 if (prop
== ZPOOL_PROP_VERSION
|| prop
== ZPROP_INVAL
) {
630 if (prop
== ZPOOL_PROP_VERSION
) {
631 VERIFY(nvpair_value_uint64(elem
, &ver
) == 0);
633 ASSERT(zpool_prop_feature(nvpair_name(elem
)));
634 ver
= SPA_VERSION_FEATURES
;
638 /* Save time if the version is already set. */
639 if (ver
== spa_version(spa
))
643 * In addition to the pool directory object, we might
644 * create the pool properties object, the features for
645 * read object, the features for write object, or the
646 * feature descriptions object.
648 error
= dsl_sync_task_do(spa_get_dsl(spa
), NULL
,
649 spa_sync_version
, spa
, &ver
, 6);
660 return (dsl_sync_task_do(spa_get_dsl(spa
), NULL
, spa_sync_props
,
668 * If the bootfs property value is dsobj, clear it.
671 spa_prop_clear_bootfs(spa_t
*spa
, uint64_t dsobj
, dmu_tx_t
*tx
)
673 if (spa
->spa_bootfs
== dsobj
&& spa
->spa_pool_props_object
!= 0) {
674 VERIFY(zap_remove(spa
->spa_meta_objset
,
675 spa
->spa_pool_props_object
,
676 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), tx
) == 0);
683 spa_change_guid_check(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
686 uint64_t *newguid
= arg2
;
687 vdev_t
*rvd
= spa
->spa_root_vdev
;
690 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
691 vdev_state
= rvd
->vdev_state
;
692 spa_config_exit(spa
, SCL_STATE
, FTAG
);
694 if (vdev_state
!= VDEV_STATE_HEALTHY
)
697 ASSERT3U(spa_guid(spa
), !=, *newguid
);
703 spa_change_guid_sync(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
706 uint64_t *newguid
= arg2
;
708 vdev_t
*rvd
= spa
->spa_root_vdev
;
710 oldguid
= spa_guid(spa
);
712 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
713 rvd
->vdev_guid
= *newguid
;
714 rvd
->vdev_guid_sum
+= (*newguid
- oldguid
);
715 vdev_config_dirty(rvd
);
716 spa_config_exit(spa
, SCL_STATE
, FTAG
);
718 spa_history_log_internal(spa
, "guid change", tx
, "old=%lld new=%lld",
723 * Change the GUID for the pool. This is done so that we can later
724 * re-import a pool built from a clone of our own vdevs. We will modify
725 * the root vdev's guid, our own pool guid, and then mark all of our
726 * vdevs dirty. Note that we must make sure that all our vdevs are
727 * online when we do this, or else any vdevs that weren't present
728 * would be orphaned from our pool. We are also going to issue a
729 * sysevent to update any watchers.
732 spa_change_guid(spa_t
*spa
)
737 mutex_enter(&spa_namespace_lock
);
738 guid
= spa_generate_guid(NULL
);
740 error
= dsl_sync_task_do(spa_get_dsl(spa
), spa_change_guid_check
,
741 spa_change_guid_sync
, spa
, &guid
, 5);
744 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
745 spa_event_notify(spa
, NULL
, ESC_ZFS_POOL_REGUID
);
748 mutex_exit(&spa_namespace_lock
);
754 * ==========================================================================
755 * SPA state manipulation (open/create/destroy/import/export)
756 * ==========================================================================
760 spa_error_entry_compare(const void *a
, const void *b
)
762 spa_error_entry_t
*sa
= (spa_error_entry_t
*)a
;
763 spa_error_entry_t
*sb
= (spa_error_entry_t
*)b
;
766 ret
= bcmp(&sa
->se_bookmark
, &sb
->se_bookmark
,
767 sizeof (zbookmark_t
));
778 * Utility function which retrieves copies of the current logs and
779 * re-initializes them in the process.
782 spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
)
784 ASSERT(MUTEX_HELD(&spa
->spa_errlist_lock
));
786 bcopy(&spa
->spa_errlist_last
, last
, sizeof (avl_tree_t
));
787 bcopy(&spa
->spa_errlist_scrub
, scrub
, sizeof (avl_tree_t
));
789 avl_create(&spa
->spa_errlist_scrub
,
790 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
791 offsetof(spa_error_entry_t
, se_avl
));
792 avl_create(&spa
->spa_errlist_last
,
793 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
794 offsetof(spa_error_entry_t
, se_avl
));
798 spa_taskq_create(spa_t
*spa
, const char *name
, enum zti_modes mode
,
802 boolean_t batch
= B_FALSE
;
806 return (NULL
); /* no taskq needed */
809 ASSERT3U(value
, >=, 1);
810 value
= MAX(value
, 1);
815 flags
|= TASKQ_THREADS_CPU_PCT
;
816 value
= zio_taskq_batch_pct
;
819 case zti_mode_online_percent
:
820 flags
|= TASKQ_THREADS_CPU_PCT
;
824 panic("unrecognized mode for %s taskq (%u:%u) in "
830 if (zio_taskq_sysdc
&& spa
->spa_proc
!= &p0
) {
832 flags
|= TASKQ_DC_BATCH
;
834 return (taskq_create_sysdc(name
, value
, 50, INT_MAX
,
835 spa
->spa_proc
, zio_taskq_basedc
, flags
));
837 return (taskq_create_proc(name
, value
, maxclsyspri
, 50, INT_MAX
,
838 spa
->spa_proc
, flags
));
842 spa_create_zio_taskqs(spa_t
*spa
)
844 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
845 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
846 const zio_taskq_info_t
*ztip
= &zio_taskqs
[t
][q
];
847 enum zti_modes mode
= ztip
->zti_mode
;
848 uint_t value
= ztip
->zti_value
;
851 (void) snprintf(name
, sizeof (name
),
852 "%s_%s", zio_type_name
[t
], zio_taskq_types
[q
]);
854 spa
->spa_zio_taskq
[t
][q
] =
855 spa_taskq_create(spa
, name
, mode
, value
);
862 spa_thread(void *arg
)
867 user_t
*pu
= PTOU(curproc
);
869 CALLB_CPR_INIT(&cprinfo
, &spa
->spa_proc_lock
, callb_generic_cpr
,
872 ASSERT(curproc
!= &p0
);
873 (void) snprintf(pu
->u_psargs
, sizeof (pu
->u_psargs
),
874 "zpool-%s", spa
->spa_name
);
875 (void) strlcpy(pu
->u_comm
, pu
->u_psargs
, sizeof (pu
->u_comm
));
877 /* bind this thread to the requested psrset */
878 if (zio_taskq_psrset_bind
!= PS_NONE
) {
880 mutex_enter(&cpu_lock
);
881 mutex_enter(&pidlock
);
882 mutex_enter(&curproc
->p_lock
);
884 if (cpupart_bind_thread(curthread
, zio_taskq_psrset_bind
,
885 0, NULL
, NULL
) == 0) {
886 curthread
->t_bind_pset
= zio_taskq_psrset_bind
;
889 "Couldn't bind process for zfs pool \"%s\" to "
890 "pset %d\n", spa
->spa_name
, zio_taskq_psrset_bind
);
893 mutex_exit(&curproc
->p_lock
);
894 mutex_exit(&pidlock
);
895 mutex_exit(&cpu_lock
);
899 if (zio_taskq_sysdc
) {
900 sysdc_thread_enter(curthread
, 100, 0);
903 spa
->spa_proc
= curproc
;
904 spa
->spa_did
= curthread
->t_did
;
906 spa_create_zio_taskqs(spa
);
908 mutex_enter(&spa
->spa_proc_lock
);
909 ASSERT(spa
->spa_proc_state
== SPA_PROC_CREATED
);
911 spa
->spa_proc_state
= SPA_PROC_ACTIVE
;
912 cv_broadcast(&spa
->spa_proc_cv
);
914 CALLB_CPR_SAFE_BEGIN(&cprinfo
);
915 while (spa
->spa_proc_state
== SPA_PROC_ACTIVE
)
916 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
917 CALLB_CPR_SAFE_END(&cprinfo
, &spa
->spa_proc_lock
);
919 ASSERT(spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
);
920 spa
->spa_proc_state
= SPA_PROC_GONE
;
922 cv_broadcast(&spa
->spa_proc_cv
);
923 CALLB_CPR_EXIT(&cprinfo
); /* drops spa_proc_lock */
925 mutex_enter(&curproc
->p_lock
);
931 * Activate an uninitialized pool.
934 spa_activate(spa_t
*spa
, int mode
)
936 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
938 spa
->spa_state
= POOL_STATE_ACTIVE
;
939 spa
->spa_mode
= mode
;
941 spa
->spa_normal_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
942 spa
->spa_log_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
944 /* Try to create a covering process */
945 mutex_enter(&spa
->spa_proc_lock
);
946 ASSERT(spa
->spa_proc_state
== SPA_PROC_NONE
);
947 ASSERT(spa
->spa_proc
== &p0
);
950 /* Only create a process if we're going to be around a while. */
951 if (spa_create_process
&& strcmp(spa
->spa_name
, TRYIMPORT_NAME
) != 0) {
952 if (newproc(spa_thread
, (caddr_t
)spa
, syscid
, maxclsyspri
,
954 spa
->spa_proc_state
= SPA_PROC_CREATED
;
955 while (spa
->spa_proc_state
== SPA_PROC_CREATED
) {
956 cv_wait(&spa
->spa_proc_cv
,
957 &spa
->spa_proc_lock
);
959 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
960 ASSERT(spa
->spa_proc
!= &p0
);
961 ASSERT(spa
->spa_did
!= 0);
965 "Couldn't create process for zfs pool \"%s\"\n",
970 mutex_exit(&spa
->spa_proc_lock
);
972 /* If we didn't create a process, we need to create our taskqs. */
973 if (spa
->spa_proc
== &p0
) {
974 spa_create_zio_taskqs(spa
);
977 list_create(&spa
->spa_config_dirty_list
, sizeof (vdev_t
),
978 offsetof(vdev_t
, vdev_config_dirty_node
));
979 list_create(&spa
->spa_state_dirty_list
, sizeof (vdev_t
),
980 offsetof(vdev_t
, vdev_state_dirty_node
));
982 txg_list_create(&spa
->spa_vdev_txg_list
,
983 offsetof(struct vdev
, vdev_txg_node
));
985 avl_create(&spa
->spa_errlist_scrub
,
986 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
987 offsetof(spa_error_entry_t
, se_avl
));
988 avl_create(&spa
->spa_errlist_last
,
989 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
990 offsetof(spa_error_entry_t
, se_avl
));
994 * Opposite of spa_activate().
997 spa_deactivate(spa_t
*spa
)
999 ASSERT(spa
->spa_sync_on
== B_FALSE
);
1000 ASSERT(spa
->spa_dsl_pool
== NULL
);
1001 ASSERT(spa
->spa_root_vdev
== NULL
);
1002 ASSERT(spa
->spa_async_zio_root
== NULL
);
1003 ASSERT(spa
->spa_state
!= POOL_STATE_UNINITIALIZED
);
1005 txg_list_destroy(&spa
->spa_vdev_txg_list
);
1007 list_destroy(&spa
->spa_config_dirty_list
);
1008 list_destroy(&spa
->spa_state_dirty_list
);
1010 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
1011 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
1012 if (spa
->spa_zio_taskq
[t
][q
] != NULL
)
1013 taskq_destroy(spa
->spa_zio_taskq
[t
][q
]);
1014 spa
->spa_zio_taskq
[t
][q
] = NULL
;
1018 metaslab_class_destroy(spa
->spa_normal_class
);
1019 spa
->spa_normal_class
= NULL
;
1021 metaslab_class_destroy(spa
->spa_log_class
);
1022 spa
->spa_log_class
= NULL
;
1025 * If this was part of an import or the open otherwise failed, we may
1026 * still have errors left in the queues. Empty them just in case.
1028 spa_errlog_drain(spa
);
1030 avl_destroy(&spa
->spa_errlist_scrub
);
1031 avl_destroy(&spa
->spa_errlist_last
);
1033 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
1035 mutex_enter(&spa
->spa_proc_lock
);
1036 if (spa
->spa_proc_state
!= SPA_PROC_NONE
) {
1037 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
1038 spa
->spa_proc_state
= SPA_PROC_DEACTIVATE
;
1039 cv_broadcast(&spa
->spa_proc_cv
);
1040 while (spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
) {
1041 ASSERT(spa
->spa_proc
!= &p0
);
1042 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
1044 ASSERT(spa
->spa_proc_state
== SPA_PROC_GONE
);
1045 spa
->spa_proc_state
= SPA_PROC_NONE
;
1047 ASSERT(spa
->spa_proc
== &p0
);
1048 mutex_exit(&spa
->spa_proc_lock
);
1051 * We want to make sure spa_thread() has actually exited the ZFS
1052 * module, so that the module can't be unloaded out from underneath
1055 if (spa
->spa_did
!= 0) {
1056 thread_join(spa
->spa_did
);
1062 * Verify a pool configuration, and construct the vdev tree appropriately. This
1063 * will create all the necessary vdevs in the appropriate layout, with each vdev
1064 * in the CLOSED state. This will prep the pool before open/creation/import.
1065 * All vdev validation is done by the vdev_alloc() routine.
1068 spa_config_parse(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
,
1069 uint_t id
, int atype
)
1075 if ((error
= vdev_alloc(spa
, vdp
, nv
, parent
, id
, atype
)) != 0)
1078 if ((*vdp
)->vdev_ops
->vdev_op_leaf
)
1081 error
= nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
1084 if (error
== ENOENT
)
1093 for (int c
= 0; c
< children
; c
++) {
1095 if ((error
= spa_config_parse(spa
, &vd
, child
[c
], *vdp
, c
,
1103 ASSERT(*vdp
!= NULL
);
1109 * Opposite of spa_load().
1112 spa_unload(spa_t
*spa
)
1116 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1121 spa_async_suspend(spa
);
1126 if (spa
->spa_sync_on
) {
1127 txg_sync_stop(spa
->spa_dsl_pool
);
1128 spa
->spa_sync_on
= B_FALSE
;
1132 * Wait for any outstanding async I/O to complete.
1134 if (spa
->spa_async_zio_root
!= NULL
) {
1135 (void) zio_wait(spa
->spa_async_zio_root
);
1136 spa
->spa_async_zio_root
= NULL
;
1139 bpobj_close(&spa
->spa_deferred_bpobj
);
1142 * Close the dsl pool.
1144 if (spa
->spa_dsl_pool
) {
1145 dsl_pool_close(spa
->spa_dsl_pool
);
1146 spa
->spa_dsl_pool
= NULL
;
1147 spa
->spa_meta_objset
= NULL
;
1152 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1155 * Drop and purge level 2 cache
1157 spa_l2cache_drop(spa
);
1162 if (spa
->spa_root_vdev
)
1163 vdev_free(spa
->spa_root_vdev
);
1164 ASSERT(spa
->spa_root_vdev
== NULL
);
1166 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1167 vdev_free(spa
->spa_spares
.sav_vdevs
[i
]);
1168 if (spa
->spa_spares
.sav_vdevs
) {
1169 kmem_free(spa
->spa_spares
.sav_vdevs
,
1170 spa
->spa_spares
.sav_count
* sizeof (void *));
1171 spa
->spa_spares
.sav_vdevs
= NULL
;
1173 if (spa
->spa_spares
.sav_config
) {
1174 nvlist_free(spa
->spa_spares
.sav_config
);
1175 spa
->spa_spares
.sav_config
= NULL
;
1177 spa
->spa_spares
.sav_count
= 0;
1179 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
1180 vdev_clear_stats(spa
->spa_l2cache
.sav_vdevs
[i
]);
1181 vdev_free(spa
->spa_l2cache
.sav_vdevs
[i
]);
1183 if (spa
->spa_l2cache
.sav_vdevs
) {
1184 kmem_free(spa
->spa_l2cache
.sav_vdevs
,
1185 spa
->spa_l2cache
.sav_count
* sizeof (void *));
1186 spa
->spa_l2cache
.sav_vdevs
= NULL
;
1188 if (spa
->spa_l2cache
.sav_config
) {
1189 nvlist_free(spa
->spa_l2cache
.sav_config
);
1190 spa
->spa_l2cache
.sav_config
= NULL
;
1192 spa
->spa_l2cache
.sav_count
= 0;
1194 spa
->spa_async_suspended
= 0;
1196 if (spa
->spa_comment
!= NULL
) {
1197 spa_strfree(spa
->spa_comment
);
1198 spa
->spa_comment
= NULL
;
1201 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1205 * Load (or re-load) the current list of vdevs describing the active spares for
1206 * this pool. When this is called, we have some form of basic information in
1207 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1208 * then re-generate a more complete list including status information.
1211 spa_load_spares(spa_t
*spa
)
1218 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1221 * First, close and free any existing spare vdevs.
1223 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1224 vd
= spa
->spa_spares
.sav_vdevs
[i
];
1226 /* Undo the call to spa_activate() below */
1227 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1228 B_FALSE
)) != NULL
&& tvd
->vdev_isspare
)
1229 spa_spare_remove(tvd
);
1234 if (spa
->spa_spares
.sav_vdevs
)
1235 kmem_free(spa
->spa_spares
.sav_vdevs
,
1236 spa
->spa_spares
.sav_count
* sizeof (void *));
1238 if (spa
->spa_spares
.sav_config
== NULL
)
1241 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
1242 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
1244 spa
->spa_spares
.sav_count
= (int)nspares
;
1245 spa
->spa_spares
.sav_vdevs
= NULL
;
1251 * Construct the array of vdevs, opening them to get status in the
1252 * process. For each spare, there is potentially two different vdev_t
1253 * structures associated with it: one in the list of spares (used only
1254 * for basic validation purposes) and one in the active vdev
1255 * configuration (if it's spared in). During this phase we open and
1256 * validate each vdev on the spare list. If the vdev also exists in the
1257 * active configuration, then we also mark this vdev as an active spare.
1259 spa
->spa_spares
.sav_vdevs
= kmem_alloc(nspares
* sizeof (void *),
1261 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1262 VERIFY(spa_config_parse(spa
, &vd
, spares
[i
], NULL
, 0,
1263 VDEV_ALLOC_SPARE
) == 0);
1266 spa
->spa_spares
.sav_vdevs
[i
] = vd
;
1268 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1269 B_FALSE
)) != NULL
) {
1270 if (!tvd
->vdev_isspare
)
1274 * We only mark the spare active if we were successfully
1275 * able to load the vdev. Otherwise, importing a pool
1276 * with a bad active spare would result in strange
1277 * behavior, because multiple pool would think the spare
1278 * is actively in use.
1280 * There is a vulnerability here to an equally bizarre
1281 * circumstance, where a dead active spare is later
1282 * brought back to life (onlined or otherwise). Given
1283 * the rarity of this scenario, and the extra complexity
1284 * it adds, we ignore the possibility.
1286 if (!vdev_is_dead(tvd
))
1287 spa_spare_activate(tvd
);
1291 vd
->vdev_aux
= &spa
->spa_spares
;
1293 if (vdev_open(vd
) != 0)
1296 if (vdev_validate_aux(vd
) == 0)
1301 * Recompute the stashed list of spares, with status information
1304 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
, ZPOOL_CONFIG_SPARES
,
1305 DATA_TYPE_NVLIST_ARRAY
) == 0);
1307 spares
= kmem_alloc(spa
->spa_spares
.sav_count
* sizeof (void *),
1309 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1310 spares
[i
] = vdev_config_generate(spa
,
1311 spa
->spa_spares
.sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_SPARE
);
1312 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
1313 ZPOOL_CONFIG_SPARES
, spares
, spa
->spa_spares
.sav_count
) == 0);
1314 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1315 nvlist_free(spares
[i
]);
1316 kmem_free(spares
, spa
->spa_spares
.sav_count
* sizeof (void *));
1320 * Load (or re-load) the current list of vdevs describing the active l2cache for
1321 * this pool. When this is called, we have some form of basic information in
1322 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1323 * then re-generate a more complete list including status information.
1324 * Devices which are already active have their details maintained, and are
1328 spa_load_l2cache(spa_t
*spa
)
1332 int i
, j
, oldnvdevs
;
1334 vdev_t
*vd
, **oldvdevs
, **newvdevs
;
1335 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
1337 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1339 if (sav
->sav_config
!= NULL
) {
1340 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
1341 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
1342 newvdevs
= kmem_alloc(nl2cache
* sizeof (void *), KM_SLEEP
);
1347 oldvdevs
= sav
->sav_vdevs
;
1348 oldnvdevs
= sav
->sav_count
;
1349 sav
->sav_vdevs
= NULL
;
1353 * Process new nvlist of vdevs.
1355 for (i
= 0; i
< nl2cache
; i
++) {
1356 VERIFY(nvlist_lookup_uint64(l2cache
[i
], ZPOOL_CONFIG_GUID
,
1360 for (j
= 0; j
< oldnvdevs
; j
++) {
1362 if (vd
!= NULL
&& guid
== vd
->vdev_guid
) {
1364 * Retain previous vdev for add/remove ops.
1372 if (newvdevs
[i
] == NULL
) {
1376 VERIFY(spa_config_parse(spa
, &vd
, l2cache
[i
], NULL
, 0,
1377 VDEV_ALLOC_L2CACHE
) == 0);
1382 * Commit this vdev as an l2cache device,
1383 * even if it fails to open.
1385 spa_l2cache_add(vd
);
1390 spa_l2cache_activate(vd
);
1392 if (vdev_open(vd
) != 0)
1395 (void) vdev_validate_aux(vd
);
1397 if (!vdev_is_dead(vd
))
1398 l2arc_add_vdev(spa
, vd
);
1403 * Purge vdevs that were dropped
1405 for (i
= 0; i
< oldnvdevs
; i
++) {
1410 ASSERT(vd
->vdev_isl2cache
);
1412 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
1413 pool
!= 0ULL && l2arc_vdev_present(vd
))
1414 l2arc_remove_vdev(vd
);
1415 vdev_clear_stats(vd
);
1421 kmem_free(oldvdevs
, oldnvdevs
* sizeof (void *));
1423 if (sav
->sav_config
== NULL
)
1426 sav
->sav_vdevs
= newvdevs
;
1427 sav
->sav_count
= (int)nl2cache
;
1430 * Recompute the stashed list of l2cache devices, with status
1431 * information this time.
1433 VERIFY(nvlist_remove(sav
->sav_config
, ZPOOL_CONFIG_L2CACHE
,
1434 DATA_TYPE_NVLIST_ARRAY
) == 0);
1436 l2cache
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
1437 for (i
= 0; i
< sav
->sav_count
; i
++)
1438 l2cache
[i
] = vdev_config_generate(spa
,
1439 sav
->sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_L2CACHE
);
1440 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
1441 ZPOOL_CONFIG_L2CACHE
, l2cache
, sav
->sav_count
) == 0);
1443 for (i
= 0; i
< sav
->sav_count
; i
++)
1444 nvlist_free(l2cache
[i
]);
1446 kmem_free(l2cache
, sav
->sav_count
* sizeof (void *));
1450 load_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
**value
)
1453 char *packed
= NULL
;
1458 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
1459 nvsize
= *(uint64_t *)db
->db_data
;
1460 dmu_buf_rele(db
, FTAG
);
1462 packed
= kmem_alloc(nvsize
, KM_SLEEP
);
1463 error
= dmu_read(spa
->spa_meta_objset
, obj
, 0, nvsize
, packed
,
1466 error
= nvlist_unpack(packed
, nvsize
, value
, 0);
1467 kmem_free(packed
, nvsize
);
1473 * Checks to see if the given vdev could not be opened, in which case we post a
1474 * sysevent to notify the autoreplace code that the device has been removed.
1477 spa_check_removed(vdev_t
*vd
)
1479 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1480 spa_check_removed(vd
->vdev_child
[c
]);
1482 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_is_dead(vd
)) {
1483 zfs_post_autoreplace(vd
->vdev_spa
, vd
);
1484 spa_event_notify(vd
->vdev_spa
, vd
, ESC_ZFS_VDEV_CHECK
);
1489 * Validate the current config against the MOS config
1492 spa_config_valid(spa_t
*spa
, nvlist_t
*config
)
1494 vdev_t
*mrvd
, *rvd
= spa
->spa_root_vdev
;
1497 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nv
) == 0);
1499 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1500 VERIFY(spa_config_parse(spa
, &mrvd
, nv
, NULL
, 0, VDEV_ALLOC_LOAD
) == 0);
1502 ASSERT3U(rvd
->vdev_children
, ==, mrvd
->vdev_children
);
1505 * If we're doing a normal import, then build up any additional
1506 * diagnostic information about missing devices in this config.
1507 * We'll pass this up to the user for further processing.
1509 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
)) {
1510 nvlist_t
**child
, *nv
;
1513 child
= kmem_alloc(rvd
->vdev_children
* sizeof (nvlist_t
**),
1515 VERIFY(nvlist_alloc(&nv
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
1517 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1518 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1519 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1521 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1522 mtvd
->vdev_ops
!= &vdev_missing_ops
&&
1524 child
[idx
++] = vdev_config_generate(spa
, mtvd
,
1529 VERIFY(nvlist_add_nvlist_array(nv
,
1530 ZPOOL_CONFIG_CHILDREN
, child
, idx
) == 0);
1531 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
1532 ZPOOL_CONFIG_MISSING_DEVICES
, nv
) == 0);
1534 for (int i
= 0; i
< idx
; i
++)
1535 nvlist_free(child
[i
]);
1538 kmem_free(child
, rvd
->vdev_children
* sizeof (char **));
1542 * Compare the root vdev tree with the information we have
1543 * from the MOS config (mrvd). Check each top-level vdev
1544 * with the corresponding MOS config top-level (mtvd).
1546 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1547 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1548 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1551 * Resolve any "missing" vdevs in the current configuration.
1552 * If we find that the MOS config has more accurate information
1553 * about the top-level vdev then use that vdev instead.
1555 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1556 mtvd
->vdev_ops
!= &vdev_missing_ops
) {
1558 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
))
1562 * Device specific actions.
1564 if (mtvd
->vdev_islog
) {
1565 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
1568 * XXX - once we have 'readonly' pool
1569 * support we should be able to handle
1570 * missing data devices by transitioning
1571 * the pool to readonly.
1577 * Swap the missing vdev with the data we were
1578 * able to obtain from the MOS config.
1580 vdev_remove_child(rvd
, tvd
);
1581 vdev_remove_child(mrvd
, mtvd
);
1583 vdev_add_child(rvd
, mtvd
);
1584 vdev_add_child(mrvd
, tvd
);
1586 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1588 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1591 } else if (mtvd
->vdev_islog
) {
1593 * Load the slog device's state from the MOS config
1594 * since it's possible that the label does not
1595 * contain the most up-to-date information.
1597 vdev_load_log_state(tvd
, mtvd
);
1602 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1605 * Ensure we were able to validate the config.
1607 return (rvd
->vdev_guid_sum
== spa
->spa_uberblock
.ub_guid_sum
);
1611 * Check for missing log devices
1614 spa_check_logs(spa_t
*spa
)
1616 switch (spa
->spa_log_state
) {
1617 case SPA_LOG_MISSING
:
1618 /* need to recheck in case slog has been restored */
1619 case SPA_LOG_UNKNOWN
:
1620 if (dmu_objset_find(spa
->spa_name
, zil_check_log_chain
, NULL
,
1621 DS_FIND_CHILDREN
)) {
1622 spa_set_log_state(spa
, SPA_LOG_MISSING
);
1631 spa_passivate_log(spa_t
*spa
)
1633 vdev_t
*rvd
= spa
->spa_root_vdev
;
1634 boolean_t slog_found
= B_FALSE
;
1636 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1638 if (!spa_has_slogs(spa
))
1641 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1642 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1643 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1645 if (tvd
->vdev_islog
) {
1646 metaslab_group_passivate(mg
);
1647 slog_found
= B_TRUE
;
1651 return (slog_found
);
1655 spa_activate_log(spa_t
*spa
)
1657 vdev_t
*rvd
= spa
->spa_root_vdev
;
1659 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1661 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1662 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1663 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1665 if (tvd
->vdev_islog
)
1666 metaslab_group_activate(mg
);
1671 spa_offline_log(spa_t
*spa
)
1675 if ((error
= dmu_objset_find(spa_name(spa
), zil_vdev_offline
,
1676 NULL
, DS_FIND_CHILDREN
)) == 0) {
1679 * We successfully offlined the log device, sync out the
1680 * current txg so that the "stubby" block can be removed
1683 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1689 spa_aux_check_removed(spa_aux_vdev_t
*sav
)
1691 for (int i
= 0; i
< sav
->sav_count
; i
++)
1692 spa_check_removed(sav
->sav_vdevs
[i
]);
1696 spa_claim_notify(zio_t
*zio
)
1698 spa_t
*spa
= zio
->io_spa
;
1703 mutex_enter(&spa
->spa_props_lock
); /* any mutex will do */
1704 if (spa
->spa_claim_max_txg
< zio
->io_bp
->blk_birth
)
1705 spa
->spa_claim_max_txg
= zio
->io_bp
->blk_birth
;
1706 mutex_exit(&spa
->spa_props_lock
);
1709 typedef struct spa_load_error
{
1710 uint64_t sle_meta_count
;
1711 uint64_t sle_data_count
;
1715 spa_load_verify_done(zio_t
*zio
)
1717 blkptr_t
*bp
= zio
->io_bp
;
1718 spa_load_error_t
*sle
= zio
->io_private
;
1719 dmu_object_type_t type
= BP_GET_TYPE(bp
);
1720 int error
= zio
->io_error
;
1723 if ((BP_GET_LEVEL(bp
) != 0 || DMU_OT_IS_METADATA(type
)) &&
1724 type
!= DMU_OT_INTENT_LOG
)
1725 atomic_add_64(&sle
->sle_meta_count
, 1);
1727 atomic_add_64(&sle
->sle_data_count
, 1);
1729 zio_data_buf_free(zio
->io_data
, zio
->io_size
);
1734 spa_load_verify_cb(spa_t
*spa
, zilog_t
*zilog
, const blkptr_t
*bp
,
1735 const zbookmark_t
*zb
, const dnode_phys_t
*dnp
, void *arg
)
1739 size_t size
= BP_GET_PSIZE(bp
);
1740 void *data
= zio_data_buf_alloc(size
);
1742 zio_nowait(zio_read(rio
, spa
, bp
, data
, size
,
1743 spa_load_verify_done
, rio
->io_private
, ZIO_PRIORITY_SCRUB
,
1744 ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_CANFAIL
|
1745 ZIO_FLAG_SCRUB
| ZIO_FLAG_RAW
, zb
));
1751 spa_load_verify(spa_t
*spa
)
1754 spa_load_error_t sle
= { 0 };
1755 zpool_rewind_policy_t policy
;
1756 boolean_t verify_ok
= B_FALSE
;
1759 zpool_get_rewind_policy(spa
->spa_config
, &policy
);
1761 if (policy
.zrp_request
& ZPOOL_NEVER_REWIND
)
1764 rio
= zio_root(spa
, NULL
, &sle
,
1765 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
);
1767 error
= traverse_pool(spa
, spa
->spa_verify_min_txg
,
1768 TRAVERSE_PRE
| TRAVERSE_PREFETCH
, spa_load_verify_cb
, rio
);
1770 (void) zio_wait(rio
);
1772 spa
->spa_load_meta_errors
= sle
.sle_meta_count
;
1773 spa
->spa_load_data_errors
= sle
.sle_data_count
;
1775 if (!error
&& sle
.sle_meta_count
<= policy
.zrp_maxmeta
&&
1776 sle
.sle_data_count
<= policy
.zrp_maxdata
) {
1780 spa
->spa_load_txg
= spa
->spa_uberblock
.ub_txg
;
1781 spa
->spa_load_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
1783 loss
= spa
->spa_last_ubsync_txg_ts
- spa
->spa_load_txg_ts
;
1784 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1785 ZPOOL_CONFIG_LOAD_TIME
, spa
->spa_load_txg_ts
) == 0);
1786 VERIFY(nvlist_add_int64(spa
->spa_load_info
,
1787 ZPOOL_CONFIG_REWIND_TIME
, loss
) == 0);
1788 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1789 ZPOOL_CONFIG_LOAD_DATA_ERRORS
, sle
.sle_data_count
) == 0);
1791 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
;
1795 if (error
!= ENXIO
&& error
!= EIO
)
1800 return (verify_ok
? 0 : EIO
);
1804 * Find a value in the pool props object.
1807 spa_prop_find(spa_t
*spa
, zpool_prop_t prop
, uint64_t *val
)
1809 (void) zap_lookup(spa
->spa_meta_objset
, spa
->spa_pool_props_object
,
1810 zpool_prop_to_name(prop
), sizeof (uint64_t), 1, val
);
1814 * Find a value in the pool directory object.
1817 spa_dir_prop(spa_t
*spa
, const char *name
, uint64_t *val
)
1819 return (zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
1820 name
, sizeof (uint64_t), 1, val
));
1824 spa_vdev_err(vdev_t
*vdev
, vdev_aux_t aux
, int err
)
1826 vdev_set_state(vdev
, B_TRUE
, VDEV_STATE_CANT_OPEN
, aux
);
1831 * Fix up config after a partly-completed split. This is done with the
1832 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
1833 * pool have that entry in their config, but only the splitting one contains
1834 * a list of all the guids of the vdevs that are being split off.
1836 * This function determines what to do with that list: either rejoin
1837 * all the disks to the pool, or complete the splitting process. To attempt
1838 * the rejoin, each disk that is offlined is marked online again, and
1839 * we do a reopen() call. If the vdev label for every disk that was
1840 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
1841 * then we call vdev_split() on each disk, and complete the split.
1843 * Otherwise we leave the config alone, with all the vdevs in place in
1844 * the original pool.
1847 spa_try_repair(spa_t
*spa
, nvlist_t
*config
)
1854 boolean_t attempt_reopen
;
1856 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
, &nvl
) != 0)
1859 /* check that the config is complete */
1860 if (nvlist_lookup_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
1861 &glist
, &gcount
) != 0)
1864 vd
= kmem_zalloc(gcount
* sizeof (vdev_t
*), KM_SLEEP
);
1866 /* attempt to online all the vdevs & validate */
1867 attempt_reopen
= B_TRUE
;
1868 for (i
= 0; i
< gcount
; i
++) {
1869 if (glist
[i
] == 0) /* vdev is hole */
1872 vd
[i
] = spa_lookup_by_guid(spa
, glist
[i
], B_FALSE
);
1873 if (vd
[i
] == NULL
) {
1875 * Don't bother attempting to reopen the disks;
1876 * just do the split.
1878 attempt_reopen
= B_FALSE
;
1880 /* attempt to re-online it */
1881 vd
[i
]->vdev_offline
= B_FALSE
;
1885 if (attempt_reopen
) {
1886 vdev_reopen(spa
->spa_root_vdev
);
1888 /* check each device to see what state it's in */
1889 for (extracted
= 0, i
= 0; i
< gcount
; i
++) {
1890 if (vd
[i
] != NULL
&&
1891 vd
[i
]->vdev_stat
.vs_aux
!= VDEV_AUX_SPLIT_POOL
)
1898 * If every disk has been moved to the new pool, or if we never
1899 * even attempted to look at them, then we split them off for
1902 if (!attempt_reopen
|| gcount
== extracted
) {
1903 for (i
= 0; i
< gcount
; i
++)
1906 vdev_reopen(spa
->spa_root_vdev
);
1909 kmem_free(vd
, gcount
* sizeof (vdev_t
*));
1913 spa_load(spa_t
*spa
, spa_load_state_t state
, spa_import_type_t type
,
1914 boolean_t mosconfig
)
1916 nvlist_t
*config
= spa
->spa_config
;
1917 char *ereport
= FM_EREPORT_ZFS_POOL
;
1923 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
, &pool_guid
))
1926 ASSERT(spa
->spa_comment
== NULL
);
1927 if (nvlist_lookup_string(config
, ZPOOL_CONFIG_COMMENT
, &comment
) == 0)
1928 spa
->spa_comment
= spa_strdup(comment
);
1931 * Versioning wasn't explicitly added to the label until later, so if
1932 * it's not present treat it as the initial version.
1934 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VERSION
,
1935 &spa
->spa_ubsync
.ub_version
) != 0)
1936 spa
->spa_ubsync
.ub_version
= SPA_VERSION_INITIAL
;
1938 (void) nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
1939 &spa
->spa_config_txg
);
1941 if ((state
== SPA_LOAD_IMPORT
|| state
== SPA_LOAD_TRYIMPORT
) &&
1942 spa_guid_exists(pool_guid
, 0)) {
1945 spa
->spa_config_guid
= pool_guid
;
1947 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
,
1949 VERIFY(nvlist_dup(nvl
, &spa
->spa_config_splitting
,
1953 nvlist_free(spa
->spa_load_info
);
1954 spa
->spa_load_info
= fnvlist_alloc();
1956 gethrestime(&spa
->spa_loaded_ts
);
1957 error
= spa_load_impl(spa
, pool_guid
, config
, state
, type
,
1958 mosconfig
, &ereport
);
1961 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
1963 if (error
!= EEXIST
) {
1964 spa
->spa_loaded_ts
.tv_sec
= 0;
1965 spa
->spa_loaded_ts
.tv_nsec
= 0;
1967 if (error
!= EBADF
) {
1968 zfs_ereport_post(ereport
, spa
, NULL
, NULL
, 0, 0);
1971 spa
->spa_load_state
= error
? SPA_LOAD_ERROR
: SPA_LOAD_NONE
;
1978 * Load an existing storage pool, using the pool's builtin spa_config as a
1979 * source of configuration information.
1982 spa_load_impl(spa_t
*spa
, uint64_t pool_guid
, nvlist_t
*config
,
1983 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
1987 nvlist_t
*nvroot
= NULL
;
1990 uberblock_t
*ub
= &spa
->spa_uberblock
;
1991 uint64_t children
, config_cache_txg
= spa
->spa_config_txg
;
1992 int orig_mode
= spa
->spa_mode
;
1995 boolean_t missing_feat_write
= B_FALSE
;
1998 * If this is an untrusted config, access the pool in read-only mode.
1999 * This prevents things like resilvering recently removed devices.
2002 spa
->spa_mode
= FREAD
;
2004 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
2006 spa
->spa_load_state
= state
;
2008 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvroot
))
2011 parse
= (type
== SPA_IMPORT_EXISTING
?
2012 VDEV_ALLOC_LOAD
: VDEV_ALLOC_SPLIT
);
2015 * Create "The Godfather" zio to hold all async IOs
2017 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
2018 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
2021 * Parse the configuration into a vdev tree. We explicitly set the
2022 * value that will be returned by spa_version() since parsing the
2023 * configuration requires knowing the version number.
2025 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2026 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, parse
);
2027 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2032 ASSERT(spa
->spa_root_vdev
== rvd
);
2034 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2035 ASSERT(spa_guid(spa
) == pool_guid
);
2039 * Try to open all vdevs, loading each label in the process.
2041 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2042 error
= vdev_open(rvd
);
2043 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2048 * We need to validate the vdev labels against the configuration that
2049 * we have in hand, which is dependent on the setting of mosconfig. If
2050 * mosconfig is true then we're validating the vdev labels based on
2051 * that config. Otherwise, we're validating against the cached config
2052 * (zpool.cache) that was read when we loaded the zfs module, and then
2053 * later we will recursively call spa_load() and validate against
2056 * If we're assembling a new pool that's been split off from an
2057 * existing pool, the labels haven't yet been updated so we skip
2058 * validation for now.
2060 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2061 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2062 error
= vdev_validate(rvd
, mosconfig
);
2063 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2068 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2073 * Find the best uberblock.
2075 vdev_uberblock_load(rvd
, ub
, &label
);
2078 * If we weren't able to find a single valid uberblock, return failure.
2080 if (ub
->ub_txg
== 0) {
2082 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, ENXIO
));
2086 * If the pool has an unsupported version we can't open it.
2088 if (!SPA_VERSION_IS_SUPPORTED(ub
->ub_version
)) {
2090 return (spa_vdev_err(rvd
, VDEV_AUX_VERSION_NEWER
, ENOTSUP
));
2093 if (ub
->ub_version
>= SPA_VERSION_FEATURES
) {
2097 * If we weren't able to find what's necessary for reading the
2098 * MOS in the label, return failure.
2100 if (label
== NULL
|| nvlist_lookup_nvlist(label
,
2101 ZPOOL_CONFIG_FEATURES_FOR_READ
, &features
) != 0) {
2103 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2108 * Update our in-core representation with the definitive values
2111 nvlist_free(spa
->spa_label_features
);
2112 VERIFY(nvlist_dup(features
, &spa
->spa_label_features
, 0) == 0);
2118 * Look through entries in the label nvlist's features_for_read. If
2119 * there is a feature listed there which we don't understand then we
2120 * cannot open a pool.
2122 if (ub
->ub_version
>= SPA_VERSION_FEATURES
) {
2123 nvlist_t
*unsup_feat
;
2125 VERIFY(nvlist_alloc(&unsup_feat
, NV_UNIQUE_NAME
, KM_SLEEP
) ==
2128 for (nvpair_t
*nvp
= nvlist_next_nvpair(spa
->spa_label_features
,
2130 nvp
= nvlist_next_nvpair(spa
->spa_label_features
, nvp
)) {
2131 if (!zfeature_is_supported(nvpair_name(nvp
))) {
2132 VERIFY(nvlist_add_string(unsup_feat
,
2133 nvpair_name(nvp
), "") == 0);
2137 if (!nvlist_empty(unsup_feat
)) {
2138 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
2139 ZPOOL_CONFIG_UNSUP_FEAT
, unsup_feat
) == 0);
2140 nvlist_free(unsup_feat
);
2141 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
,
2145 nvlist_free(unsup_feat
);
2149 * If the vdev guid sum doesn't match the uberblock, we have an
2150 * incomplete configuration. We first check to see if the pool
2151 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
2152 * If it is, defer the vdev_guid_sum check till later so we
2153 * can handle missing vdevs.
2155 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VDEV_CHILDREN
,
2156 &children
) != 0 && mosconfig
&& type
!= SPA_IMPORT_ASSEMBLE
&&
2157 rvd
->vdev_guid_sum
!= ub
->ub_guid_sum
)
2158 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
, ENXIO
));
2160 if (type
!= SPA_IMPORT_ASSEMBLE
&& spa
->spa_config_splitting
) {
2161 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2162 spa_try_repair(spa
, config
);
2163 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2164 nvlist_free(spa
->spa_config_splitting
);
2165 spa
->spa_config_splitting
= NULL
;
2169 * Initialize internal SPA structures.
2171 spa
->spa_state
= POOL_STATE_ACTIVE
;
2172 spa
->spa_ubsync
= spa
->spa_uberblock
;
2173 spa
->spa_verify_min_txg
= spa
->spa_extreme_rewind
?
2174 TXG_INITIAL
- 1 : spa_last_synced_txg(spa
) - TXG_DEFER_SIZE
- 1;
2175 spa
->spa_first_txg
= spa
->spa_last_ubsync_txg
?
2176 spa
->spa_last_ubsync_txg
: spa_last_synced_txg(spa
) + 1;
2177 spa
->spa_claim_max_txg
= spa
->spa_first_txg
;
2178 spa
->spa_prev_software_version
= ub
->ub_software_version
;
2180 error
= dsl_pool_init(spa
, spa
->spa_first_txg
, &spa
->spa_dsl_pool
);
2182 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2183 spa
->spa_meta_objset
= spa
->spa_dsl_pool
->dp_meta_objset
;
2185 if (spa_dir_prop(spa
, DMU_POOL_CONFIG
, &spa
->spa_config_object
) != 0)
2186 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2188 if (spa_version(spa
) >= SPA_VERSION_FEATURES
) {
2189 boolean_t missing_feat_read
= B_FALSE
;
2190 nvlist_t
*unsup_feat
, *enabled_feat
;
2192 if (spa_dir_prop(spa
, DMU_POOL_FEATURES_FOR_READ
,
2193 &spa
->spa_feat_for_read_obj
) != 0) {
2194 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2197 if (spa_dir_prop(spa
, DMU_POOL_FEATURES_FOR_WRITE
,
2198 &spa
->spa_feat_for_write_obj
) != 0) {
2199 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2202 if (spa_dir_prop(spa
, DMU_POOL_FEATURE_DESCRIPTIONS
,
2203 &spa
->spa_feat_desc_obj
) != 0) {
2204 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2207 enabled_feat
= fnvlist_alloc();
2208 unsup_feat
= fnvlist_alloc();
2210 if (!feature_is_supported(spa
->spa_meta_objset
,
2211 spa
->spa_feat_for_read_obj
, spa
->spa_feat_desc_obj
,
2212 unsup_feat
, enabled_feat
))
2213 missing_feat_read
= B_TRUE
;
2215 if (spa_writeable(spa
) || state
== SPA_LOAD_TRYIMPORT
) {
2216 if (!feature_is_supported(spa
->spa_meta_objset
,
2217 spa
->spa_feat_for_write_obj
, spa
->spa_feat_desc_obj
,
2218 unsup_feat
, enabled_feat
)) {
2219 missing_feat_write
= B_TRUE
;
2223 fnvlist_add_nvlist(spa
->spa_load_info
,
2224 ZPOOL_CONFIG_ENABLED_FEAT
, enabled_feat
);
2226 if (!nvlist_empty(unsup_feat
)) {
2227 fnvlist_add_nvlist(spa
->spa_load_info
,
2228 ZPOOL_CONFIG_UNSUP_FEAT
, unsup_feat
);
2231 fnvlist_free(enabled_feat
);
2232 fnvlist_free(unsup_feat
);
2234 if (!missing_feat_read
) {
2235 fnvlist_add_boolean(spa
->spa_load_info
,
2236 ZPOOL_CONFIG_CAN_RDONLY
);
2240 * If the state is SPA_LOAD_TRYIMPORT, our objective is
2241 * twofold: to determine whether the pool is available for
2242 * import in read-write mode and (if it is not) whether the
2243 * pool is available for import in read-only mode. If the pool
2244 * is available for import in read-write mode, it is displayed
2245 * as available in userland; if it is not available for import
2246 * in read-only mode, it is displayed as unavailable in
2247 * userland. If the pool is available for import in read-only
2248 * mode but not read-write mode, it is displayed as unavailable
2249 * in userland with a special note that the pool is actually
2250 * available for open in read-only mode.
2252 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are
2253 * missing a feature for write, we must first determine whether
2254 * the pool can be opened read-only before returning to
2255 * userland in order to know whether to display the
2256 * abovementioned note.
2258 if (missing_feat_read
|| (missing_feat_write
&&
2259 spa_writeable(spa
))) {
2260 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
,
2265 spa
->spa_is_initializing
= B_TRUE
;
2266 error
= dsl_pool_open(spa
->spa_dsl_pool
);
2267 spa
->spa_is_initializing
= B_FALSE
;
2269 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2273 nvlist_t
*policy
= NULL
, *nvconfig
;
2275 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2276 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2278 if (!spa_is_root(spa
) && nvlist_lookup_uint64(nvconfig
,
2279 ZPOOL_CONFIG_HOSTID
, &hostid
) == 0) {
2281 unsigned long myhostid
= 0;
2283 VERIFY(nvlist_lookup_string(nvconfig
,
2284 ZPOOL_CONFIG_HOSTNAME
, &hostname
) == 0);
2287 myhostid
= zone_get_hostid(NULL
);
2290 * We're emulating the system's hostid in userland, so
2291 * we can't use zone_get_hostid().
2293 (void) ddi_strtoul(hw_serial
, NULL
, 10, &myhostid
);
2294 #endif /* _KERNEL */
2295 if (hostid
!= 0 && myhostid
!= 0 &&
2296 hostid
!= myhostid
) {
2297 nvlist_free(nvconfig
);
2298 cmn_err(CE_WARN
, "pool '%s' could not be "
2299 "loaded as it was last accessed by "
2300 "another system (host: %s hostid: 0x%lx). "
2301 "See: http://illumos.org/msg/ZFS-8000-EY",
2302 spa_name(spa
), hostname
,
2303 (unsigned long)hostid
);
2307 if (nvlist_lookup_nvlist(spa
->spa_config
,
2308 ZPOOL_REWIND_POLICY
, &policy
) == 0)
2309 VERIFY(nvlist_add_nvlist(nvconfig
,
2310 ZPOOL_REWIND_POLICY
, policy
) == 0);
2312 spa_config_set(spa
, nvconfig
);
2314 spa_deactivate(spa
);
2315 spa_activate(spa
, orig_mode
);
2317 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, B_TRUE
));
2320 if (spa_dir_prop(spa
, DMU_POOL_SYNC_BPOBJ
, &obj
) != 0)
2321 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2322 error
= bpobj_open(&spa
->spa_deferred_bpobj
, spa
->spa_meta_objset
, obj
);
2324 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2327 * Load the bit that tells us to use the new accounting function
2328 * (raid-z deflation). If we have an older pool, this will not
2331 error
= spa_dir_prop(spa
, DMU_POOL_DEFLATE
, &spa
->spa_deflate
);
2332 if (error
!= 0 && error
!= ENOENT
)
2333 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2335 error
= spa_dir_prop(spa
, DMU_POOL_CREATION_VERSION
,
2336 &spa
->spa_creation_version
);
2337 if (error
!= 0 && error
!= ENOENT
)
2338 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2341 * Load the persistent error log. If we have an older pool, this will
2344 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_LAST
, &spa
->spa_errlog_last
);
2345 if (error
!= 0 && error
!= ENOENT
)
2346 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2348 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_SCRUB
,
2349 &spa
->spa_errlog_scrub
);
2350 if (error
!= 0 && error
!= ENOENT
)
2351 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2354 * Load the history object. If we have an older pool, this
2355 * will not be present.
2357 error
= spa_dir_prop(spa
, DMU_POOL_HISTORY
, &spa
->spa_history
);
2358 if (error
!= 0 && error
!= ENOENT
)
2359 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2362 * If we're assembling the pool from the split-off vdevs of
2363 * an existing pool, we don't want to attach the spares & cache
2368 * Load any hot spares for this pool.
2370 error
= spa_dir_prop(spa
, DMU_POOL_SPARES
, &spa
->spa_spares
.sav_object
);
2371 if (error
!= 0 && error
!= ENOENT
)
2372 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2373 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2374 ASSERT(spa_version(spa
) >= SPA_VERSION_SPARES
);
2375 if (load_nvlist(spa
, spa
->spa_spares
.sav_object
,
2376 &spa
->spa_spares
.sav_config
) != 0)
2377 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2379 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2380 spa_load_spares(spa
);
2381 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2382 } else if (error
== 0) {
2383 spa
->spa_spares
.sav_sync
= B_TRUE
;
2387 * Load any level 2 ARC devices for this pool.
2389 error
= spa_dir_prop(spa
, DMU_POOL_L2CACHE
,
2390 &spa
->spa_l2cache
.sav_object
);
2391 if (error
!= 0 && error
!= ENOENT
)
2392 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2393 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2394 ASSERT(spa_version(spa
) >= SPA_VERSION_L2CACHE
);
2395 if (load_nvlist(spa
, spa
->spa_l2cache
.sav_object
,
2396 &spa
->spa_l2cache
.sav_config
) != 0)
2397 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2399 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2400 spa_load_l2cache(spa
);
2401 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2402 } else if (error
== 0) {
2403 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
2406 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
2408 error
= spa_dir_prop(spa
, DMU_POOL_PROPS
, &spa
->spa_pool_props_object
);
2409 if (error
&& error
!= ENOENT
)
2410 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2413 uint64_t autoreplace
;
2415 spa_prop_find(spa
, ZPOOL_PROP_BOOTFS
, &spa
->spa_bootfs
);
2416 spa_prop_find(spa
, ZPOOL_PROP_AUTOREPLACE
, &autoreplace
);
2417 spa_prop_find(spa
, ZPOOL_PROP_DELEGATION
, &spa
->spa_delegation
);
2418 spa_prop_find(spa
, ZPOOL_PROP_FAILUREMODE
, &spa
->spa_failmode
);
2419 spa_prop_find(spa
, ZPOOL_PROP_AUTOEXPAND
, &spa
->spa_autoexpand
);
2420 spa_prop_find(spa
, ZPOOL_PROP_DEDUPDITTO
,
2421 &spa
->spa_dedup_ditto
);
2423 spa
->spa_autoreplace
= (autoreplace
!= 0);
2427 * If the 'autoreplace' property is set, then post a resource notifying
2428 * the ZFS DE that it should not issue any faults for unopenable
2429 * devices. We also iterate over the vdevs, and post a sysevent for any
2430 * unopenable vdevs so that the normal autoreplace handler can take
2433 if (spa
->spa_autoreplace
&& state
!= SPA_LOAD_TRYIMPORT
) {
2434 spa_check_removed(spa
->spa_root_vdev
);
2436 * For the import case, this is done in spa_import(), because
2437 * at this point we're using the spare definitions from
2438 * the MOS config, not necessarily from the userland config.
2440 if (state
!= SPA_LOAD_IMPORT
) {
2441 spa_aux_check_removed(&spa
->spa_spares
);
2442 spa_aux_check_removed(&spa
->spa_l2cache
);
2447 * Load the vdev state for all toplevel vdevs.
2452 * Propagate the leaf DTLs we just loaded all the way up the tree.
2454 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2455 vdev_dtl_reassess(rvd
, 0, 0, B_FALSE
);
2456 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2459 * Load the DDTs (dedup tables).
2461 error
= ddt_load(spa
);
2463 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2465 spa_update_dspace(spa
);
2468 * Validate the config, using the MOS config to fill in any
2469 * information which might be missing. If we fail to validate
2470 * the config then declare the pool unfit for use. If we're
2471 * assembling a pool from a split, the log is not transferred
2474 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2477 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2478 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2480 if (!spa_config_valid(spa
, nvconfig
)) {
2481 nvlist_free(nvconfig
);
2482 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
,
2485 nvlist_free(nvconfig
);
2488 * Now that we've validated the config, check the state of the
2489 * root vdev. If it can't be opened, it indicates one or
2490 * more toplevel vdevs are faulted.
2492 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2495 if (spa_check_logs(spa
)) {
2496 *ereport
= FM_EREPORT_ZFS_LOG_REPLAY
;
2497 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_LOG
, ENXIO
));
2501 if (missing_feat_write
) {
2502 ASSERT(state
== SPA_LOAD_TRYIMPORT
);
2505 * At this point, we know that we can open the pool in
2506 * read-only mode but not read-write mode. We now have enough
2507 * information and can return to userland.
2509 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
, ENOTSUP
));
2513 * We've successfully opened the pool, verify that we're ready
2514 * to start pushing transactions.
2516 if (state
!= SPA_LOAD_TRYIMPORT
) {
2517 if (error
= spa_load_verify(spa
))
2518 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2522 if (spa_writeable(spa
) && (state
== SPA_LOAD_RECOVER
||
2523 spa
->spa_load_max_txg
== UINT64_MAX
)) {
2525 int need_update
= B_FALSE
;
2527 ASSERT(state
!= SPA_LOAD_TRYIMPORT
);
2530 * Claim log blocks that haven't been committed yet.
2531 * This must all happen in a single txg.
2532 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2533 * invoked from zil_claim_log_block()'s i/o done callback.
2534 * Price of rollback is that we abandon the log.
2536 spa
->spa_claiming
= B_TRUE
;
2538 tx
= dmu_tx_create_assigned(spa_get_dsl(spa
),
2539 spa_first_txg(spa
));
2540 (void) dmu_objset_find(spa_name(spa
),
2541 zil_claim
, tx
, DS_FIND_CHILDREN
);
2544 spa
->spa_claiming
= B_FALSE
;
2546 spa_set_log_state(spa
, SPA_LOG_GOOD
);
2547 spa
->spa_sync_on
= B_TRUE
;
2548 txg_sync_start(spa
->spa_dsl_pool
);
2551 * Wait for all claims to sync. We sync up to the highest
2552 * claimed log block birth time so that claimed log blocks
2553 * don't appear to be from the future. spa_claim_max_txg
2554 * will have been set for us by either zil_check_log_chain()
2555 * (invoked from spa_check_logs()) or zil_claim() above.
2557 txg_wait_synced(spa
->spa_dsl_pool
, spa
->spa_claim_max_txg
);
2560 * If the config cache is stale, or we have uninitialized
2561 * metaslabs (see spa_vdev_add()), then update the config.
2563 * If this is a verbatim import, trust the current
2564 * in-core spa_config and update the disk labels.
2566 if (config_cache_txg
!= spa
->spa_config_txg
||
2567 state
== SPA_LOAD_IMPORT
||
2568 state
== SPA_LOAD_RECOVER
||
2569 (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
))
2570 need_update
= B_TRUE
;
2572 for (int c
= 0; c
< rvd
->vdev_children
; c
++)
2573 if (rvd
->vdev_child
[c
]->vdev_ms_array
== 0)
2574 need_update
= B_TRUE
;
2577 * Update the config cache asychronously in case we're the
2578 * root pool, in which case the config cache isn't writable yet.
2581 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
2584 * Check all DTLs to see if anything needs resilvering.
2586 if (!dsl_scan_resilvering(spa
->spa_dsl_pool
) &&
2587 vdev_resilver_needed(rvd
, NULL
, NULL
))
2588 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
2591 * Log the fact that we booted up (so that we can detect if
2592 * we rebooted in the middle of an operation).
2594 spa_history_log_version(spa
, "open");
2597 * Delete any inconsistent datasets.
2599 (void) dmu_objset_find(spa_name(spa
),
2600 dsl_destroy_inconsistent
, NULL
, DS_FIND_CHILDREN
);
2603 * Clean up any stale temporary dataset userrefs.
2605 dsl_pool_clean_tmp_userrefs(spa
->spa_dsl_pool
);
2612 spa_load_retry(spa_t
*spa
, spa_load_state_t state
, int mosconfig
)
2614 int mode
= spa
->spa_mode
;
2617 spa_deactivate(spa
);
2619 spa
->spa_load_max_txg
--;
2621 spa_activate(spa
, mode
);
2622 spa_async_suspend(spa
);
2624 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, mosconfig
));
2628 * If spa_load() fails this function will try loading prior txg's. If
2629 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool
2630 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this
2631 * function will not rewind the pool and will return the same error as
2635 spa_load_best(spa_t
*spa
, spa_load_state_t state
, int mosconfig
,
2636 uint64_t max_request
, int rewind_flags
)
2638 nvlist_t
*loadinfo
= NULL
;
2639 nvlist_t
*config
= NULL
;
2640 int load_error
, rewind_error
;
2641 uint64_t safe_rewind_txg
;
2644 if (spa
->spa_load_txg
&& state
== SPA_LOAD_RECOVER
) {
2645 spa
->spa_load_max_txg
= spa
->spa_load_txg
;
2646 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2648 spa
->spa_load_max_txg
= max_request
;
2651 load_error
= rewind_error
= spa_load(spa
, state
, SPA_IMPORT_EXISTING
,
2653 if (load_error
== 0)
2656 if (spa
->spa_root_vdev
!= NULL
)
2657 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2659 spa
->spa_last_ubsync_txg
= spa
->spa_uberblock
.ub_txg
;
2660 spa
->spa_last_ubsync_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
2662 if (rewind_flags
& ZPOOL_NEVER_REWIND
) {
2663 nvlist_free(config
);
2664 return (load_error
);
2667 if (state
== SPA_LOAD_RECOVER
) {
2668 /* Price of rolling back is discarding txgs, including log */
2669 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2672 * If we aren't rolling back save the load info from our first
2673 * import attempt so that we can restore it after attempting
2676 loadinfo
= spa
->spa_load_info
;
2677 spa
->spa_load_info
= fnvlist_alloc();
2680 spa
->spa_load_max_txg
= spa
->spa_last_ubsync_txg
;
2681 safe_rewind_txg
= spa
->spa_last_ubsync_txg
- TXG_DEFER_SIZE
;
2682 min_txg
= (rewind_flags
& ZPOOL_EXTREME_REWIND
) ?
2683 TXG_INITIAL
: safe_rewind_txg
;
2686 * Continue as long as we're finding errors, we're still within
2687 * the acceptable rewind range, and we're still finding uberblocks
2689 while (rewind_error
&& spa
->spa_uberblock
.ub_txg
>= min_txg
&&
2690 spa
->spa_uberblock
.ub_txg
<= spa
->spa_load_max_txg
) {
2691 if (spa
->spa_load_max_txg
< safe_rewind_txg
)
2692 spa
->spa_extreme_rewind
= B_TRUE
;
2693 rewind_error
= spa_load_retry(spa
, state
, mosconfig
);
2696 spa
->spa_extreme_rewind
= B_FALSE
;
2697 spa
->spa_load_max_txg
= UINT64_MAX
;
2699 if (config
&& (rewind_error
|| state
!= SPA_LOAD_RECOVER
))
2700 spa_config_set(spa
, config
);
2702 if (state
== SPA_LOAD_RECOVER
) {
2703 ASSERT3P(loadinfo
, ==, NULL
);
2704 return (rewind_error
);
2706 /* Store the rewind info as part of the initial load info */
2707 fnvlist_add_nvlist(loadinfo
, ZPOOL_CONFIG_REWIND_INFO
,
2708 spa
->spa_load_info
);
2710 /* Restore the initial load info */
2711 fnvlist_free(spa
->spa_load_info
);
2712 spa
->spa_load_info
= loadinfo
;
2714 return (load_error
);
2721 * The import case is identical to an open except that the configuration is sent
2722 * down from userland, instead of grabbed from the configuration cache. For the
2723 * case of an open, the pool configuration will exist in the
2724 * POOL_STATE_UNINITIALIZED state.
2726 * The stats information (gen/count/ustats) is used to gather vdev statistics at
2727 * the same time open the pool, without having to keep around the spa_t in some
2731 spa_open_common(const char *pool
, spa_t
**spapp
, void *tag
, nvlist_t
*nvpolicy
,
2735 spa_load_state_t state
= SPA_LOAD_OPEN
;
2737 int locked
= B_FALSE
;
2742 * As disgusting as this is, we need to support recursive calls to this
2743 * function because dsl_dir_open() is called during spa_load(), and ends
2744 * up calling spa_open() again. The real fix is to figure out how to
2745 * avoid dsl_dir_open() calling this in the first place.
2747 if (mutex_owner(&spa_namespace_lock
) != curthread
) {
2748 mutex_enter(&spa_namespace_lock
);
2752 if ((spa
= spa_lookup(pool
)) == NULL
) {
2754 mutex_exit(&spa_namespace_lock
);
2758 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
) {
2759 zpool_rewind_policy_t policy
;
2761 zpool_get_rewind_policy(nvpolicy
? nvpolicy
: spa
->spa_config
,
2763 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
2764 state
= SPA_LOAD_RECOVER
;
2766 spa_activate(spa
, spa_mode_global
);
2768 if (state
!= SPA_LOAD_RECOVER
)
2769 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
2771 error
= spa_load_best(spa
, state
, B_FALSE
, policy
.zrp_txg
,
2772 policy
.zrp_request
);
2774 if (error
== EBADF
) {
2776 * If vdev_validate() returns failure (indicated by
2777 * EBADF), it indicates that one of the vdevs indicates
2778 * that the pool has been exported or destroyed. If
2779 * this is the case, the config cache is out of sync and
2780 * we should remove the pool from the namespace.
2783 spa_deactivate(spa
);
2784 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
2787 mutex_exit(&spa_namespace_lock
);
2793 * We can't open the pool, but we still have useful
2794 * information: the state of each vdev after the
2795 * attempted vdev_open(). Return this to the user.
2797 if (config
!= NULL
&& spa
->spa_config
) {
2798 VERIFY(nvlist_dup(spa
->spa_config
, config
,
2800 VERIFY(nvlist_add_nvlist(*config
,
2801 ZPOOL_CONFIG_LOAD_INFO
,
2802 spa
->spa_load_info
) == 0);
2805 spa_deactivate(spa
);
2806 spa
->spa_last_open_failed
= error
;
2808 mutex_exit(&spa_namespace_lock
);
2814 spa_open_ref(spa
, tag
);
2817 *config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2820 * If we've recovered the pool, pass back any information we
2821 * gathered while doing the load.
2823 if (state
== SPA_LOAD_RECOVER
) {
2824 VERIFY(nvlist_add_nvlist(*config
, ZPOOL_CONFIG_LOAD_INFO
,
2825 spa
->spa_load_info
) == 0);
2829 spa
->spa_last_open_failed
= 0;
2830 spa
->spa_last_ubsync_txg
= 0;
2831 spa
->spa_load_txg
= 0;
2832 mutex_exit(&spa_namespace_lock
);
2841 spa_open_rewind(const char *name
, spa_t
**spapp
, void *tag
, nvlist_t
*policy
,
2844 return (spa_open_common(name
, spapp
, tag
, policy
, config
));
2848 spa_open(const char *name
, spa_t
**spapp
, void *tag
)
2850 return (spa_open_common(name
, spapp
, tag
, NULL
, NULL
));
2854 * Lookup the given spa_t, incrementing the inject count in the process,
2855 * preventing it from being exported or destroyed.
2858 spa_inject_addref(char *name
)
2862 mutex_enter(&spa_namespace_lock
);
2863 if ((spa
= spa_lookup(name
)) == NULL
) {
2864 mutex_exit(&spa_namespace_lock
);
2867 spa
->spa_inject_ref
++;
2868 mutex_exit(&spa_namespace_lock
);
2874 spa_inject_delref(spa_t
*spa
)
2876 mutex_enter(&spa_namespace_lock
);
2877 spa
->spa_inject_ref
--;
2878 mutex_exit(&spa_namespace_lock
);
2882 * Add spares device information to the nvlist.
2885 spa_add_spares(spa_t
*spa
, nvlist_t
*config
)
2895 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2897 if (spa
->spa_spares
.sav_count
== 0)
2900 VERIFY(nvlist_lookup_nvlist(config
,
2901 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2902 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
2903 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2905 VERIFY(nvlist_add_nvlist_array(nvroot
,
2906 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
2907 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2908 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2911 * Go through and find any spares which have since been
2912 * repurposed as an active spare. If this is the case, update
2913 * their status appropriately.
2915 for (i
= 0; i
< nspares
; i
++) {
2916 VERIFY(nvlist_lookup_uint64(spares
[i
],
2917 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2918 if (spa_spare_exists(guid
, &pool
, NULL
) &&
2920 VERIFY(nvlist_lookup_uint64_array(
2921 spares
[i
], ZPOOL_CONFIG_VDEV_STATS
,
2922 (uint64_t **)&vs
, &vsc
) == 0);
2923 vs
->vs_state
= VDEV_STATE_CANT_OPEN
;
2924 vs
->vs_aux
= VDEV_AUX_SPARED
;
2931 * Add l2cache device information to the nvlist, including vdev stats.
2934 spa_add_l2cache(spa_t
*spa
, nvlist_t
*config
)
2937 uint_t i
, j
, nl2cache
;
2944 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2946 if (spa
->spa_l2cache
.sav_count
== 0)
2949 VERIFY(nvlist_lookup_nvlist(config
,
2950 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2951 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
2952 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2953 if (nl2cache
!= 0) {
2954 VERIFY(nvlist_add_nvlist_array(nvroot
,
2955 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
2956 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2957 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2960 * Update level 2 cache device stats.
2963 for (i
= 0; i
< nl2cache
; i
++) {
2964 VERIFY(nvlist_lookup_uint64(l2cache
[i
],
2965 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2968 for (j
= 0; j
< spa
->spa_l2cache
.sav_count
; j
++) {
2970 spa
->spa_l2cache
.sav_vdevs
[j
]->vdev_guid
) {
2971 vd
= spa
->spa_l2cache
.sav_vdevs
[j
];
2977 VERIFY(nvlist_lookup_uint64_array(l2cache
[i
],
2978 ZPOOL_CONFIG_VDEV_STATS
, (uint64_t **)&vs
, &vsc
)
2980 vdev_get_stats(vd
, vs
);
2986 spa_add_feature_stats(spa_t
*spa
, nvlist_t
*config
)
2992 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2993 VERIFY(nvlist_alloc(&features
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
2995 if (spa
->spa_feat_for_read_obj
!= 0) {
2996 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
2997 spa
->spa_feat_for_read_obj
);
2998 zap_cursor_retrieve(&zc
, &za
) == 0;
2999 zap_cursor_advance(&zc
)) {
3000 ASSERT(za
.za_integer_length
== sizeof (uint64_t) &&
3001 za
.za_num_integers
== 1);
3002 VERIFY3U(0, ==, nvlist_add_uint64(features
, za
.za_name
,
3003 za
.za_first_integer
));
3005 zap_cursor_fini(&zc
);
3008 if (spa
->spa_feat_for_write_obj
!= 0) {
3009 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
3010 spa
->spa_feat_for_write_obj
);
3011 zap_cursor_retrieve(&zc
, &za
) == 0;
3012 zap_cursor_advance(&zc
)) {
3013 ASSERT(za
.za_integer_length
== sizeof (uint64_t) &&
3014 za
.za_num_integers
== 1);
3015 VERIFY3U(0, ==, nvlist_add_uint64(features
, za
.za_name
,
3016 za
.za_first_integer
));
3018 zap_cursor_fini(&zc
);
3021 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_FEATURE_STATS
,
3023 nvlist_free(features
);
3027 spa_get_stats(const char *name
, nvlist_t
**config
,
3028 char *altroot
, size_t buflen
)
3034 error
= spa_open_common(name
, &spa
, FTAG
, NULL
, config
);
3038 * This still leaves a window of inconsistency where the spares
3039 * or l2cache devices could change and the config would be
3040 * self-inconsistent.
3042 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3044 if (*config
!= NULL
) {
3045 uint64_t loadtimes
[2];
3047 loadtimes
[0] = spa
->spa_loaded_ts
.tv_sec
;
3048 loadtimes
[1] = spa
->spa_loaded_ts
.tv_nsec
;
3049 VERIFY(nvlist_add_uint64_array(*config
,
3050 ZPOOL_CONFIG_LOADED_TIME
, loadtimes
, 2) == 0);
3052 VERIFY(nvlist_add_uint64(*config
,
3053 ZPOOL_CONFIG_ERRCOUNT
,
3054 spa_get_errlog_size(spa
)) == 0);
3056 if (spa_suspended(spa
))
3057 VERIFY(nvlist_add_uint64(*config
,
3058 ZPOOL_CONFIG_SUSPENDED
,
3059 spa
->spa_failmode
) == 0);
3061 spa_add_spares(spa
, *config
);
3062 spa_add_l2cache(spa
, *config
);
3063 spa_add_feature_stats(spa
, *config
);
3068 * We want to get the alternate root even for faulted pools, so we cheat
3069 * and call spa_lookup() directly.
3073 mutex_enter(&spa_namespace_lock
);
3074 spa
= spa_lookup(name
);
3076 spa_altroot(spa
, altroot
, buflen
);
3080 mutex_exit(&spa_namespace_lock
);
3082 spa_altroot(spa
, altroot
, buflen
);
3087 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3088 spa_close(spa
, FTAG
);
3095 * Validate that the auxiliary device array is well formed. We must have an
3096 * array of nvlists, each which describes a valid leaf vdev. If this is an
3097 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
3098 * specified, as long as they are well-formed.
3101 spa_validate_aux_devs(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
,
3102 spa_aux_vdev_t
*sav
, const char *config
, uint64_t version
,
3103 vdev_labeltype_t label
)
3110 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
3113 * It's acceptable to have no devs specified.
3115 if (nvlist_lookup_nvlist_array(nvroot
, config
, &dev
, &ndev
) != 0)
3122 * Make sure the pool is formatted with a version that supports this
3125 if (spa_version(spa
) < version
)
3129 * Set the pending device list so we correctly handle device in-use
3132 sav
->sav_pending
= dev
;
3133 sav
->sav_npending
= ndev
;
3135 for (i
= 0; i
< ndev
; i
++) {
3136 if ((error
= spa_config_parse(spa
, &vd
, dev
[i
], NULL
, 0,
3140 if (!vd
->vdev_ops
->vdev_op_leaf
) {
3147 * The L2ARC currently only supports disk devices in
3148 * kernel context. For user-level testing, we allow it.
3151 if ((strcmp(config
, ZPOOL_CONFIG_L2CACHE
) == 0) &&
3152 strcmp(vd
->vdev_ops
->vdev_op_type
, VDEV_TYPE_DISK
) != 0) {
3160 if ((error
= vdev_open(vd
)) == 0 &&
3161 (error
= vdev_label_init(vd
, crtxg
, label
)) == 0) {
3162 VERIFY(nvlist_add_uint64(dev
[i
], ZPOOL_CONFIG_GUID
,
3163 vd
->vdev_guid
) == 0);
3169 (mode
!= VDEV_ALLOC_SPARE
&& mode
!= VDEV_ALLOC_L2CACHE
))
3176 sav
->sav_pending
= NULL
;
3177 sav
->sav_npending
= 0;
3182 spa_validate_aux(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
)
3186 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
3188 if ((error
= spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
3189 &spa
->spa_spares
, ZPOOL_CONFIG_SPARES
, SPA_VERSION_SPARES
,
3190 VDEV_LABEL_SPARE
)) != 0) {
3194 return (spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
3195 &spa
->spa_l2cache
, ZPOOL_CONFIG_L2CACHE
, SPA_VERSION_L2CACHE
,
3196 VDEV_LABEL_L2CACHE
));
3200 spa_set_aux_vdevs(spa_aux_vdev_t
*sav
, nvlist_t
**devs
, int ndevs
,
3205 if (sav
->sav_config
!= NULL
) {
3211 * Generate new dev list by concatentating with the
3214 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
, config
,
3215 &olddevs
, &oldndevs
) == 0);
3217 newdevs
= kmem_alloc(sizeof (void *) *
3218 (ndevs
+ oldndevs
), KM_SLEEP
);
3219 for (i
= 0; i
< oldndevs
; i
++)
3220 VERIFY(nvlist_dup(olddevs
[i
], &newdevs
[i
],
3222 for (i
= 0; i
< ndevs
; i
++)
3223 VERIFY(nvlist_dup(devs
[i
], &newdevs
[i
+ oldndevs
],
3226 VERIFY(nvlist_remove(sav
->sav_config
, config
,
3227 DATA_TYPE_NVLIST_ARRAY
) == 0);
3229 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
3230 config
, newdevs
, ndevs
+ oldndevs
) == 0);
3231 for (i
= 0; i
< oldndevs
+ ndevs
; i
++)
3232 nvlist_free(newdevs
[i
]);
3233 kmem_free(newdevs
, (oldndevs
+ ndevs
) * sizeof (void *));
3236 * Generate a new dev list.
3238 VERIFY(nvlist_alloc(&sav
->sav_config
, NV_UNIQUE_NAME
,
3240 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
, config
,
3246 * Stop and drop level 2 ARC devices
3249 spa_l2cache_drop(spa_t
*spa
)
3253 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
3255 for (i
= 0; i
< sav
->sav_count
; i
++) {
3258 vd
= sav
->sav_vdevs
[i
];
3261 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
3262 pool
!= 0ULL && l2arc_vdev_present(vd
))
3263 l2arc_remove_vdev(vd
);
3271 spa_create(const char *pool
, nvlist_t
*nvroot
, nvlist_t
*props
,
3275 char *altroot
= NULL
;
3280 uint64_t txg
= TXG_INITIAL
;
3281 nvlist_t
**spares
, **l2cache
;
3282 uint_t nspares
, nl2cache
;
3283 uint64_t version
, obj
;
3284 boolean_t has_features
;
3287 * If this pool already exists, return failure.
3289 mutex_enter(&spa_namespace_lock
);
3290 if (spa_lookup(pool
) != NULL
) {
3291 mutex_exit(&spa_namespace_lock
);
3296 * Allocate a new spa_t structure.
3298 (void) nvlist_lookup_string(props
,
3299 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3300 spa
= spa_add(pool
, NULL
, altroot
);
3301 spa_activate(spa
, spa_mode_global
);
3303 if (props
&& (error
= spa_prop_validate(spa
, props
))) {
3304 spa_deactivate(spa
);
3306 mutex_exit(&spa_namespace_lock
);
3310 has_features
= B_FALSE
;
3311 for (nvpair_t
*elem
= nvlist_next_nvpair(props
, NULL
);
3312 elem
!= NULL
; elem
= nvlist_next_nvpair(props
, elem
)) {
3313 if (zpool_prop_feature(nvpair_name(elem
)))
3314 has_features
= B_TRUE
;
3317 if (has_features
|| nvlist_lookup_uint64(props
,
3318 zpool_prop_to_name(ZPOOL_PROP_VERSION
), &version
) != 0) {
3319 version
= SPA_VERSION
;
3321 ASSERT(SPA_VERSION_IS_SUPPORTED(version
));
3323 spa
->spa_first_txg
= txg
;
3324 spa
->spa_uberblock
.ub_txg
= txg
- 1;
3325 spa
->spa_uberblock
.ub_version
= version
;
3326 spa
->spa_ubsync
= spa
->spa_uberblock
;
3329 * Create "The Godfather" zio to hold all async IOs
3331 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
3332 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
3335 * Create the root vdev.
3337 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3339 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, VDEV_ALLOC_ADD
);
3341 ASSERT(error
!= 0 || rvd
!= NULL
);
3342 ASSERT(error
!= 0 || spa
->spa_root_vdev
== rvd
);
3344 if (error
== 0 && !zfs_allocatable_devs(nvroot
))
3348 (error
= vdev_create(rvd
, txg
, B_FALSE
)) == 0 &&
3349 (error
= spa_validate_aux(spa
, nvroot
, txg
,
3350 VDEV_ALLOC_ADD
)) == 0) {
3351 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
3352 vdev_metaslab_set_size(rvd
->vdev_child
[c
]);
3353 vdev_expand(rvd
->vdev_child
[c
], txg
);
3357 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3361 spa_deactivate(spa
);
3363 mutex_exit(&spa_namespace_lock
);
3368 * Get the list of spares, if specified.
3370 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3371 &spares
, &nspares
) == 0) {
3372 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
, NV_UNIQUE_NAME
,
3374 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3375 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3376 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3377 spa_load_spares(spa
);
3378 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3379 spa
->spa_spares
.sav_sync
= B_TRUE
;
3383 * Get the list of level 2 cache devices, if specified.
3385 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3386 &l2cache
, &nl2cache
) == 0) {
3387 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3388 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3389 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3390 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3391 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3392 spa_load_l2cache(spa
);
3393 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3394 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3397 spa
->spa_is_initializing
= B_TRUE
;
3398 spa
->spa_dsl_pool
= dp
= dsl_pool_create(spa
, zplprops
, txg
);
3399 spa
->spa_meta_objset
= dp
->dp_meta_objset
;
3400 spa
->spa_is_initializing
= B_FALSE
;
3403 * Create DDTs (dedup tables).
3407 spa_update_dspace(spa
);
3409 tx
= dmu_tx_create_assigned(dp
, txg
);
3412 * Create the pool config object.
3414 spa
->spa_config_object
= dmu_object_alloc(spa
->spa_meta_objset
,
3415 DMU_OT_PACKED_NVLIST
, SPA_CONFIG_BLOCKSIZE
,
3416 DMU_OT_PACKED_NVLIST_SIZE
, sizeof (uint64_t), tx
);
3418 if (zap_add(spa
->spa_meta_objset
,
3419 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CONFIG
,
3420 sizeof (uint64_t), 1, &spa
->spa_config_object
, tx
) != 0) {
3421 cmn_err(CE_PANIC
, "failed to add pool config");
3424 if (spa_version(spa
) >= SPA_VERSION_FEATURES
)
3425 spa_feature_create_zap_objects(spa
, tx
);
3427 if (zap_add(spa
->spa_meta_objset
,
3428 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CREATION_VERSION
,
3429 sizeof (uint64_t), 1, &version
, tx
) != 0) {
3430 cmn_err(CE_PANIC
, "failed to add pool version");
3433 /* Newly created pools with the right version are always deflated. */
3434 if (version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
3435 spa
->spa_deflate
= TRUE
;
3436 if (zap_add(spa
->spa_meta_objset
,
3437 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
3438 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
) != 0) {
3439 cmn_err(CE_PANIC
, "failed to add deflate");
3444 * Create the deferred-free bpobj. Turn off compression
3445 * because sync-to-convergence takes longer if the blocksize
3448 obj
= bpobj_alloc(spa
->spa_meta_objset
, 1 << 14, tx
);
3449 dmu_object_set_compress(spa
->spa_meta_objset
, obj
,
3450 ZIO_COMPRESS_OFF
, tx
);
3451 if (zap_add(spa
->spa_meta_objset
,
3452 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_SYNC_BPOBJ
,
3453 sizeof (uint64_t), 1, &obj
, tx
) != 0) {
3454 cmn_err(CE_PANIC
, "failed to add bpobj");
3456 VERIFY3U(0, ==, bpobj_open(&spa
->spa_deferred_bpobj
,
3457 spa
->spa_meta_objset
, obj
));
3460 * Create the pool's history object.
3462 if (version
>= SPA_VERSION_ZPOOL_HISTORY
)
3463 spa_history_create_obj(spa
, tx
);
3466 * Set pool properties.
3468 spa
->spa_bootfs
= zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS
);
3469 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
3470 spa
->spa_failmode
= zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE
);
3471 spa
->spa_autoexpand
= zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND
);
3473 if (props
!= NULL
) {
3474 spa_configfile_set(spa
, props
, B_FALSE
);
3475 spa_sync_props(spa
, props
, tx
);
3480 spa
->spa_sync_on
= B_TRUE
;
3481 txg_sync_start(spa
->spa_dsl_pool
);
3484 * We explicitly wait for the first transaction to complete so that our
3485 * bean counters are appropriately updated.
3487 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
3489 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3491 spa_history_log_version(spa
, "create");
3493 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
3495 mutex_exit(&spa_namespace_lock
);
3502 * Get the root pool information from the root disk, then import the root pool
3503 * during the system boot up time.
3505 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t
**);
3508 spa_generate_rootconf(char *devpath
, char *devid
, uint64_t *guid
)
3511 nvlist_t
*nvtop
, *nvroot
;
3514 if (vdev_disk_read_rootlabel(devpath
, devid
, &config
) != 0)
3518 * Add this top-level vdev to the child array.
3520 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3522 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
3524 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_GUID
, guid
) == 0);
3527 * Put this pool's top-level vdevs into a root vdev.
3529 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3530 VERIFY(nvlist_add_string(nvroot
, ZPOOL_CONFIG_TYPE
,
3531 VDEV_TYPE_ROOT
) == 0);
3532 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_ID
, 0ULL) == 0);
3533 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_GUID
, pgid
) == 0);
3534 VERIFY(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
3538 * Replace the existing vdev_tree with the new root vdev in
3539 * this pool's configuration (remove the old, add the new).
3541 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, nvroot
) == 0);
3542 nvlist_free(nvroot
);
3547 * Walk the vdev tree and see if we can find a device with "better"
3548 * configuration. A configuration is "better" if the label on that
3549 * device has a more recent txg.
3552 spa_alt_rootvdev(vdev_t
*vd
, vdev_t
**avd
, uint64_t *txg
)
3554 for (int c
= 0; c
< vd
->vdev_children
; c
++)
3555 spa_alt_rootvdev(vd
->vdev_child
[c
], avd
, txg
);
3557 if (vd
->vdev_ops
->vdev_op_leaf
) {
3561 if (vdev_disk_read_rootlabel(vd
->vdev_physpath
, vd
->vdev_devid
,
3565 VERIFY(nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_TXG
,
3569 * Do we have a better boot device?
3571 if (label_txg
> *txg
) {
3580 * Import a root pool.
3582 * For x86. devpath_list will consist of devid and/or physpath name of
3583 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3584 * The GRUB "findroot" command will return the vdev we should boot.
3586 * For Sparc, devpath_list consists the physpath name of the booting device
3587 * no matter the rootpool is a single device pool or a mirrored pool.
3589 * "/pci@1f,0/ide@d/disk@0,0:a"
3592 spa_import_rootpool(char *devpath
, char *devid
)
3595 vdev_t
*rvd
, *bvd
, *avd
= NULL
;
3596 nvlist_t
*config
, *nvtop
;
3602 * Read the label from the boot device and generate a configuration.
3604 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3605 #if defined(_OBP) && defined(_KERNEL)
3606 if (config
== NULL
) {
3607 if (strstr(devpath
, "/iscsi/ssd") != NULL
) {
3609 get_iscsi_bootpath_phy(devpath
);
3610 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3614 if (config
== NULL
) {
3615 cmn_err(CE_NOTE
, "Cannot read the pool label from '%s'",
3620 VERIFY(nvlist_lookup_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3622 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
, &txg
) == 0);
3624 mutex_enter(&spa_namespace_lock
);
3625 if ((spa
= spa_lookup(pname
)) != NULL
) {
3627 * Remove the existing root pool from the namespace so that we
3628 * can replace it with the correct config we just read in.
3633 spa
= spa_add(pname
, config
, NULL
);
3634 spa
->spa_is_root
= B_TRUE
;
3635 spa
->spa_import_flags
= ZFS_IMPORT_VERBATIM
;
3638 * Build up a vdev tree based on the boot device's label config.
3640 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3642 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3643 error
= spa_config_parse(spa
, &rvd
, nvtop
, NULL
, 0,
3644 VDEV_ALLOC_ROOTPOOL
);
3645 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3647 mutex_exit(&spa_namespace_lock
);
3648 nvlist_free(config
);
3649 cmn_err(CE_NOTE
, "Can not parse the config for pool '%s'",
3655 * Get the boot vdev.
3657 if ((bvd
= vdev_lookup_by_guid(rvd
, guid
)) == NULL
) {
3658 cmn_err(CE_NOTE
, "Can not find the boot vdev for guid %llu",
3659 (u_longlong_t
)guid
);
3665 * Determine if there is a better boot device.
3668 spa_alt_rootvdev(rvd
, &avd
, &txg
);
3670 cmn_err(CE_NOTE
, "The boot device is 'degraded'. Please "
3671 "try booting from '%s'", avd
->vdev_path
);
3677 * If the boot device is part of a spare vdev then ensure that
3678 * we're booting off the active spare.
3680 if (bvd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
3681 !bvd
->vdev_isspare
) {
3682 cmn_err(CE_NOTE
, "The boot device is currently spared. Please "
3683 "try booting from '%s'",
3685 vdev_child
[bvd
->vdev_parent
->vdev_children
- 1]->vdev_path
);
3692 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3694 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3695 mutex_exit(&spa_namespace_lock
);
3697 nvlist_free(config
);
3704 * Import a non-root pool into the system.
3707 spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
, uint64_t flags
)
3710 char *altroot
= NULL
;
3711 spa_load_state_t state
= SPA_LOAD_IMPORT
;
3712 zpool_rewind_policy_t policy
;
3713 uint64_t mode
= spa_mode_global
;
3714 uint64_t readonly
= B_FALSE
;
3717 nvlist_t
**spares
, **l2cache
;
3718 uint_t nspares
, nl2cache
;
3721 * If a pool with this name exists, return failure.
3723 mutex_enter(&spa_namespace_lock
);
3724 if (spa_lookup(pool
) != NULL
) {
3725 mutex_exit(&spa_namespace_lock
);
3730 * Create and initialize the spa structure.
3732 (void) nvlist_lookup_string(props
,
3733 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3734 (void) nvlist_lookup_uint64(props
,
3735 zpool_prop_to_name(ZPOOL_PROP_READONLY
), &readonly
);
3738 spa
= spa_add(pool
, config
, altroot
);
3739 spa
->spa_import_flags
= flags
;
3742 * Verbatim import - Take a pool and insert it into the namespace
3743 * as if it had been loaded at boot.
3745 if (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) {
3747 spa_configfile_set(spa
, props
, B_FALSE
);
3749 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3751 mutex_exit(&spa_namespace_lock
);
3752 spa_history_log_version(spa
, "import");
3757 spa_activate(spa
, mode
);
3760 * Don't start async tasks until we know everything is healthy.
3762 spa_async_suspend(spa
);
3764 zpool_get_rewind_policy(config
, &policy
);
3765 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
3766 state
= SPA_LOAD_RECOVER
;
3769 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
3770 * because the user-supplied config is actually the one to trust when
3773 if (state
!= SPA_LOAD_RECOVER
)
3774 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
3776 error
= spa_load_best(spa
, state
, B_TRUE
, policy
.zrp_txg
,
3777 policy
.zrp_request
);
3780 * Propagate anything learned while loading the pool and pass it
3781 * back to caller (i.e. rewind info, missing devices, etc).
3783 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
3784 spa
->spa_load_info
) == 0);
3786 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3788 * Toss any existing sparelist, as it doesn't have any validity
3789 * anymore, and conflicts with spa_has_spare().
3791 if (spa
->spa_spares
.sav_config
) {
3792 nvlist_free(spa
->spa_spares
.sav_config
);
3793 spa
->spa_spares
.sav_config
= NULL
;
3794 spa_load_spares(spa
);
3796 if (spa
->spa_l2cache
.sav_config
) {
3797 nvlist_free(spa
->spa_l2cache
.sav_config
);
3798 spa
->spa_l2cache
.sav_config
= NULL
;
3799 spa_load_l2cache(spa
);
3802 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3805 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3808 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3809 VDEV_ALLOC_L2CACHE
);
3810 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3813 spa_configfile_set(spa
, props
, B_FALSE
);
3815 if (error
!= 0 || (props
&& spa_writeable(spa
) &&
3816 (error
= spa_prop_set(spa
, props
)))) {
3818 spa_deactivate(spa
);
3820 mutex_exit(&spa_namespace_lock
);
3824 spa_async_resume(spa
);
3827 * Override any spares and level 2 cache devices as specified by
3828 * the user, as these may have correct device names/devids, etc.
3830 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3831 &spares
, &nspares
) == 0) {
3832 if (spa
->spa_spares
.sav_config
)
3833 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
,
3834 ZPOOL_CONFIG_SPARES
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3836 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
,
3837 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3838 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3839 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3840 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3841 spa_load_spares(spa
);
3842 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3843 spa
->spa_spares
.sav_sync
= B_TRUE
;
3845 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3846 &l2cache
, &nl2cache
) == 0) {
3847 if (spa
->spa_l2cache
.sav_config
)
3848 VERIFY(nvlist_remove(spa
->spa_l2cache
.sav_config
,
3849 ZPOOL_CONFIG_L2CACHE
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3851 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3852 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3853 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3854 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3855 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3856 spa_load_l2cache(spa
);
3857 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3858 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3862 * Check for any removed devices.
3864 if (spa
->spa_autoreplace
) {
3865 spa_aux_check_removed(&spa
->spa_spares
);
3866 spa_aux_check_removed(&spa
->spa_l2cache
);
3869 if (spa_writeable(spa
)) {
3871 * Update the config cache to include the newly-imported pool.
3873 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
3877 * It's possible that the pool was expanded while it was exported.
3878 * We kick off an async task to handle this for us.
3880 spa_async_request(spa
, SPA_ASYNC_AUTOEXPAND
);
3882 mutex_exit(&spa_namespace_lock
);
3883 spa_history_log_version(spa
, "import");
3889 spa_tryimport(nvlist_t
*tryconfig
)
3891 nvlist_t
*config
= NULL
;
3897 if (nvlist_lookup_string(tryconfig
, ZPOOL_CONFIG_POOL_NAME
, &poolname
))
3900 if (nvlist_lookup_uint64(tryconfig
, ZPOOL_CONFIG_POOL_STATE
, &state
))
3904 * Create and initialize the spa structure.
3906 mutex_enter(&spa_namespace_lock
);
3907 spa
= spa_add(TRYIMPORT_NAME
, tryconfig
, NULL
);
3908 spa_activate(spa
, FREAD
);
3911 * Pass off the heavy lifting to spa_load().
3912 * Pass TRUE for mosconfig because the user-supplied config
3913 * is actually the one to trust when doing an import.
3915 error
= spa_load(spa
, SPA_LOAD_TRYIMPORT
, SPA_IMPORT_EXISTING
, B_TRUE
);
3918 * If 'tryconfig' was at least parsable, return the current config.
3920 if (spa
->spa_root_vdev
!= NULL
) {
3921 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
3922 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3924 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
3926 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_TIMESTAMP
,
3927 spa
->spa_uberblock
.ub_timestamp
) == 0);
3928 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
3929 spa
->spa_load_info
) == 0);
3932 * If the bootfs property exists on this pool then we
3933 * copy it out so that external consumers can tell which
3934 * pools are bootable.
3936 if ((!error
|| error
== EEXIST
) && spa
->spa_bootfs
) {
3937 char *tmpname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
3940 * We have to play games with the name since the
3941 * pool was opened as TRYIMPORT_NAME.
3943 if (dsl_dsobj_to_dsname(spa_name(spa
),
3944 spa
->spa_bootfs
, tmpname
) == 0) {
3946 char *dsname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
3948 cp
= strchr(tmpname
, '/');
3950 (void) strlcpy(dsname
, tmpname
,
3953 (void) snprintf(dsname
, MAXPATHLEN
,
3954 "%s/%s", poolname
, ++cp
);
3956 VERIFY(nvlist_add_string(config
,
3957 ZPOOL_CONFIG_BOOTFS
, dsname
) == 0);
3958 kmem_free(dsname
, MAXPATHLEN
);
3960 kmem_free(tmpname
, MAXPATHLEN
);
3964 * Add the list of hot spares and level 2 cache devices.
3966 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3967 spa_add_spares(spa
, config
);
3968 spa_add_l2cache(spa
, config
);
3969 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3973 spa_deactivate(spa
);
3975 mutex_exit(&spa_namespace_lock
);
3981 * Pool export/destroy
3983 * The act of destroying or exporting a pool is very simple. We make sure there
3984 * is no more pending I/O and any references to the pool are gone. Then, we
3985 * update the pool state and sync all the labels to disk, removing the
3986 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
3987 * we don't sync the labels or remove the configuration cache.
3990 spa_export_common(char *pool
, int new_state
, nvlist_t
**oldconfig
,
3991 boolean_t force
, boolean_t hardforce
)
3998 if (!(spa_mode_global
& FWRITE
))
4001 mutex_enter(&spa_namespace_lock
);
4002 if ((spa
= spa_lookup(pool
)) == NULL
) {
4003 mutex_exit(&spa_namespace_lock
);
4008 * Put a hold on the pool, drop the namespace lock, stop async tasks,
4009 * reacquire the namespace lock, and see if we can export.
4011 spa_open_ref(spa
, FTAG
);
4012 mutex_exit(&spa_namespace_lock
);
4013 spa_async_suspend(spa
);
4014 mutex_enter(&spa_namespace_lock
);
4015 spa_close(spa
, FTAG
);
4018 * The pool will be in core if it's openable,
4019 * in which case we can modify its state.
4021 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
&& spa
->spa_sync_on
) {
4023 * Objsets may be open only because they're dirty, so we
4024 * have to force it to sync before checking spa_refcnt.
4026 txg_wait_synced(spa
->spa_dsl_pool
, 0);
4029 * A pool cannot be exported or destroyed if there are active
4030 * references. If we are resetting a pool, allow references by
4031 * fault injection handlers.
4033 if (!spa_refcount_zero(spa
) ||
4034 (spa
->spa_inject_ref
!= 0 &&
4035 new_state
!= POOL_STATE_UNINITIALIZED
)) {
4036 spa_async_resume(spa
);
4037 mutex_exit(&spa_namespace_lock
);
4042 * A pool cannot be exported if it has an active shared spare.
4043 * This is to prevent other pools stealing the active spare
4044 * from an exported pool. At user's own will, such pool can
4045 * be forcedly exported.
4047 if (!force
&& new_state
== POOL_STATE_EXPORTED
&&
4048 spa_has_active_shared_spare(spa
)) {
4049 spa_async_resume(spa
);
4050 mutex_exit(&spa_namespace_lock
);
4055 * We want this to be reflected on every label,
4056 * so mark them all dirty. spa_unload() will do the
4057 * final sync that pushes these changes out.
4059 if (new_state
!= POOL_STATE_UNINITIALIZED
&& !hardforce
) {
4060 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4061 spa
->spa_state
= new_state
;
4062 spa
->spa_final_txg
= spa_last_synced_txg(spa
) +
4064 vdev_config_dirty(spa
->spa_root_vdev
);
4065 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4069 spa_event_notify(spa
, NULL
, ESC_ZFS_POOL_DESTROY
);
4071 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
4073 spa_deactivate(spa
);
4076 if (oldconfig
&& spa
->spa_config
)
4077 VERIFY(nvlist_dup(spa
->spa_config
, oldconfig
, 0) == 0);
4079 if (new_state
!= POOL_STATE_UNINITIALIZED
) {
4081 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
4084 mutex_exit(&spa_namespace_lock
);
4090 * Destroy a storage pool.
4093 spa_destroy(char *pool
)
4095 return (spa_export_common(pool
, POOL_STATE_DESTROYED
, NULL
,
4100 * Export a storage pool.
4103 spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
4104 boolean_t hardforce
)
4106 return (spa_export_common(pool
, POOL_STATE_EXPORTED
, oldconfig
,
4111 * Similar to spa_export(), this unloads the spa_t without actually removing it
4112 * from the namespace in any way.
4115 spa_reset(char *pool
)
4117 return (spa_export_common(pool
, POOL_STATE_UNINITIALIZED
, NULL
,
4122 * ==========================================================================
4123 * Device manipulation
4124 * ==========================================================================
4128 * Add a device to a storage pool.
4131 spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
)
4135 vdev_t
*rvd
= spa
->spa_root_vdev
;
4137 nvlist_t
**spares
, **l2cache
;
4138 uint_t nspares
, nl2cache
;
4140 ASSERT(spa_writeable(spa
));
4142 txg
= spa_vdev_enter(spa
);
4144 if ((error
= spa_config_parse(spa
, &vd
, nvroot
, NULL
, 0,
4145 VDEV_ALLOC_ADD
)) != 0)
4146 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4148 spa
->spa_pending_vdev
= vd
; /* spa_vdev_exit() will clear this */
4150 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
, &spares
,
4154 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
, &l2cache
,
4158 if (vd
->vdev_children
== 0 && nspares
== 0 && nl2cache
== 0)
4159 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
4161 if (vd
->vdev_children
!= 0 &&
4162 (error
= vdev_create(vd
, txg
, B_FALSE
)) != 0)
4163 return (spa_vdev_exit(spa
, vd
, txg
, error
));
4166 * We must validate the spares and l2cache devices after checking the
4167 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
4169 if ((error
= spa_validate_aux(spa
, nvroot
, txg
, VDEV_ALLOC_ADD
)) != 0)
4170 return (spa_vdev_exit(spa
, vd
, txg
, error
));
4173 * Transfer each new top-level vdev from vd to rvd.
4175 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
4178 * Set the vdev id to the first hole, if one exists.
4180 for (id
= 0; id
< rvd
->vdev_children
; id
++) {
4181 if (rvd
->vdev_child
[id
]->vdev_ishole
) {
4182 vdev_free(rvd
->vdev_child
[id
]);
4186 tvd
= vd
->vdev_child
[c
];
4187 vdev_remove_child(vd
, tvd
);
4189 vdev_add_child(rvd
, tvd
);
4190 vdev_config_dirty(tvd
);
4194 spa_set_aux_vdevs(&spa
->spa_spares
, spares
, nspares
,
4195 ZPOOL_CONFIG_SPARES
);
4196 spa_load_spares(spa
);
4197 spa
->spa_spares
.sav_sync
= B_TRUE
;
4200 if (nl2cache
!= 0) {
4201 spa_set_aux_vdevs(&spa
->spa_l2cache
, l2cache
, nl2cache
,
4202 ZPOOL_CONFIG_L2CACHE
);
4203 spa_load_l2cache(spa
);
4204 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4208 * We have to be careful when adding new vdevs to an existing pool.
4209 * If other threads start allocating from these vdevs before we
4210 * sync the config cache, and we lose power, then upon reboot we may
4211 * fail to open the pool because there are DVAs that the config cache
4212 * can't translate. Therefore, we first add the vdevs without
4213 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
4214 * and then let spa_config_update() initialize the new metaslabs.
4216 * spa_load() checks for added-but-not-initialized vdevs, so that
4217 * if we lose power at any point in this sequence, the remaining
4218 * steps will be completed the next time we load the pool.
4220 (void) spa_vdev_exit(spa
, vd
, txg
, 0);
4222 mutex_enter(&spa_namespace_lock
);
4223 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
4224 mutex_exit(&spa_namespace_lock
);
4230 * Attach a device to a mirror. The arguments are the path to any device
4231 * in the mirror, and the nvroot for the new device. If the path specifies
4232 * a device that is not mirrored, we automatically insert the mirror vdev.
4234 * If 'replacing' is specified, the new device is intended to replace the
4235 * existing device; in this case the two devices are made into their own
4236 * mirror using the 'replacing' vdev, which is functionally identical to
4237 * the mirror vdev (it actually reuses all the same ops) but has a few
4238 * extra rules: you can't attach to it after it's been created, and upon
4239 * completion of resilvering, the first disk (the one being replaced)
4240 * is automatically detached.
4243 spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
, int replacing
)
4245 uint64_t txg
, dtl_max_txg
;
4246 vdev_t
*rvd
= spa
->spa_root_vdev
;
4247 vdev_t
*oldvd
, *newvd
, *newrootvd
, *pvd
, *tvd
;
4249 char *oldvdpath
, *newvdpath
;
4253 ASSERT(spa_writeable(spa
));
4255 txg
= spa_vdev_enter(spa
);
4257 oldvd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4260 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4262 if (!oldvd
->vdev_ops
->vdev_op_leaf
)
4263 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4265 pvd
= oldvd
->vdev_parent
;
4267 if ((error
= spa_config_parse(spa
, &newrootvd
, nvroot
, NULL
, 0,
4268 VDEV_ALLOC_ATTACH
)) != 0)
4269 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4271 if (newrootvd
->vdev_children
!= 1)
4272 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
4274 newvd
= newrootvd
->vdev_child
[0];
4276 if (!newvd
->vdev_ops
->vdev_op_leaf
)
4277 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
4279 if ((error
= vdev_create(newrootvd
, txg
, replacing
)) != 0)
4280 return (spa_vdev_exit(spa
, newrootvd
, txg
, error
));
4283 * Spares can't replace logs
4285 if (oldvd
->vdev_top
->vdev_islog
&& newvd
->vdev_isspare
)
4286 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4290 * For attach, the only allowable parent is a mirror or the root
4293 if (pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4294 pvd
->vdev_ops
!= &vdev_root_ops
)
4295 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4297 pvops
= &vdev_mirror_ops
;
4300 * Active hot spares can only be replaced by inactive hot
4303 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4304 oldvd
->vdev_isspare
&&
4305 !spa_has_spare(spa
, newvd
->vdev_guid
))
4306 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4309 * If the source is a hot spare, and the parent isn't already a
4310 * spare, then we want to create a new hot spare. Otherwise, we
4311 * want to create a replacing vdev. The user is not allowed to
4312 * attach to a spared vdev child unless the 'isspare' state is
4313 * the same (spare replaces spare, non-spare replaces
4316 if (pvd
->vdev_ops
== &vdev_replacing_ops
&&
4317 spa_version(spa
) < SPA_VERSION_MULTI_REPLACE
) {
4318 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4319 } else if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4320 newvd
->vdev_isspare
!= oldvd
->vdev_isspare
) {
4321 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4324 if (newvd
->vdev_isspare
)
4325 pvops
= &vdev_spare_ops
;
4327 pvops
= &vdev_replacing_ops
;
4331 * Make sure the new device is big enough.
4333 if (newvd
->vdev_asize
< vdev_get_min_asize(oldvd
))
4334 return (spa_vdev_exit(spa
, newrootvd
, txg
, EOVERFLOW
));
4337 * The new device cannot have a higher alignment requirement
4338 * than the top-level vdev.
4340 if (newvd
->vdev_ashift
> oldvd
->vdev_top
->vdev_ashift
)
4341 return (spa_vdev_exit(spa
, newrootvd
, txg
, EDOM
));
4344 * If this is an in-place replacement, update oldvd's path and devid
4345 * to make it distinguishable from newvd, and unopenable from now on.
4347 if (strcmp(oldvd
->vdev_path
, newvd
->vdev_path
) == 0) {
4348 spa_strfree(oldvd
->vdev_path
);
4349 oldvd
->vdev_path
= kmem_alloc(strlen(newvd
->vdev_path
) + 5,
4351 (void) sprintf(oldvd
->vdev_path
, "%s/%s",
4352 newvd
->vdev_path
, "old");
4353 if (oldvd
->vdev_devid
!= NULL
) {
4354 spa_strfree(oldvd
->vdev_devid
);
4355 oldvd
->vdev_devid
= NULL
;
4359 /* mark the device being resilvered */
4360 newvd
->vdev_resilvering
= B_TRUE
;
4363 * If the parent is not a mirror, or if we're replacing, insert the new
4364 * mirror/replacing/spare vdev above oldvd.
4366 if (pvd
->vdev_ops
!= pvops
)
4367 pvd
= vdev_add_parent(oldvd
, pvops
);
4369 ASSERT(pvd
->vdev_top
->vdev_parent
== rvd
);
4370 ASSERT(pvd
->vdev_ops
== pvops
);
4371 ASSERT(oldvd
->vdev_parent
== pvd
);
4374 * Extract the new device from its root and add it to pvd.
4376 vdev_remove_child(newrootvd
, newvd
);
4377 newvd
->vdev_id
= pvd
->vdev_children
;
4378 newvd
->vdev_crtxg
= oldvd
->vdev_crtxg
;
4379 vdev_add_child(pvd
, newvd
);
4381 tvd
= newvd
->vdev_top
;
4382 ASSERT(pvd
->vdev_top
== tvd
);
4383 ASSERT(tvd
->vdev_parent
== rvd
);
4385 vdev_config_dirty(tvd
);
4388 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
4389 * for any dmu_sync-ed blocks. It will propagate upward when
4390 * spa_vdev_exit() calls vdev_dtl_reassess().
4392 dtl_max_txg
= txg
+ TXG_CONCURRENT_STATES
;
4394 vdev_dtl_dirty(newvd
, DTL_MISSING
, TXG_INITIAL
,
4395 dtl_max_txg
- TXG_INITIAL
);
4397 if (newvd
->vdev_isspare
) {
4398 spa_spare_activate(newvd
);
4399 spa_event_notify(spa
, newvd
, ESC_ZFS_VDEV_SPARE
);
4402 oldvdpath
= spa_strdup(oldvd
->vdev_path
);
4403 newvdpath
= spa_strdup(newvd
->vdev_path
);
4404 newvd_isspare
= newvd
->vdev_isspare
;
4407 * Mark newvd's DTL dirty in this txg.
4409 vdev_dirty(tvd
, VDD_DTL
, newvd
, txg
);
4412 * Restart the resilver
4414 dsl_resilver_restart(spa
->spa_dsl_pool
, dtl_max_txg
);
4419 (void) spa_vdev_exit(spa
, newrootvd
, dtl_max_txg
, 0);
4421 spa_history_log_internal(spa
, "vdev attach", NULL
,
4422 "%s vdev=%s %s vdev=%s",
4423 replacing
&& newvd_isspare
? "spare in" :
4424 replacing
? "replace" : "attach", newvdpath
,
4425 replacing
? "for" : "to", oldvdpath
);
4427 spa_strfree(oldvdpath
);
4428 spa_strfree(newvdpath
);
4430 if (spa
->spa_bootfs
)
4431 spa_event_notify(spa
, newvd
, ESC_ZFS_BOOTFS_VDEV_ATTACH
);
4437 * Detach a device from a mirror or replacing vdev.
4438 * If 'replace_done' is specified, only detach if the parent
4439 * is a replacing vdev.
4442 spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
, int replace_done
)
4446 vdev_t
*rvd
= spa
->spa_root_vdev
;
4447 vdev_t
*vd
, *pvd
, *cvd
, *tvd
;
4448 boolean_t unspare
= B_FALSE
;
4449 uint64_t unspare_guid
;
4452 ASSERT(spa_writeable(spa
));
4454 txg
= spa_vdev_enter(spa
);
4456 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4459 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4461 if (!vd
->vdev_ops
->vdev_op_leaf
)
4462 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4464 pvd
= vd
->vdev_parent
;
4467 * If the parent/child relationship is not as expected, don't do it.
4468 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4469 * vdev that's replacing B with C. The user's intent in replacing
4470 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4471 * the replace by detaching C, the expected behavior is to end up
4472 * M(A,B). But suppose that right after deciding to detach C,
4473 * the replacement of B completes. We would have M(A,C), and then
4474 * ask to detach C, which would leave us with just A -- not what
4475 * the user wanted. To prevent this, we make sure that the
4476 * parent/child relationship hasn't changed -- in this example,
4477 * that C's parent is still the replacing vdev R.
4479 if (pvd
->vdev_guid
!= pguid
&& pguid
!= 0)
4480 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4483 * Only 'replacing' or 'spare' vdevs can be replaced.
4485 if (replace_done
&& pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4486 pvd
->vdev_ops
!= &vdev_spare_ops
)
4487 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4489 ASSERT(pvd
->vdev_ops
!= &vdev_spare_ops
||
4490 spa_version(spa
) >= SPA_VERSION_SPARES
);
4493 * Only mirror, replacing, and spare vdevs support detach.
4495 if (pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4496 pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4497 pvd
->vdev_ops
!= &vdev_spare_ops
)
4498 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4501 * If this device has the only valid copy of some data,
4502 * we cannot safely detach it.
4504 if (vdev_dtl_required(vd
))
4505 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4507 ASSERT(pvd
->vdev_children
>= 2);
4510 * If we are detaching the second disk from a replacing vdev, then
4511 * check to see if we changed the original vdev's path to have "/old"
4512 * at the end in spa_vdev_attach(). If so, undo that change now.
4514 if (pvd
->vdev_ops
== &vdev_replacing_ops
&& vd
->vdev_id
> 0 &&
4515 vd
->vdev_path
!= NULL
) {
4516 size_t len
= strlen(vd
->vdev_path
);
4518 for (int c
= 0; c
< pvd
->vdev_children
; c
++) {
4519 cvd
= pvd
->vdev_child
[c
];
4521 if (cvd
== vd
|| cvd
->vdev_path
== NULL
)
4524 if (strncmp(cvd
->vdev_path
, vd
->vdev_path
, len
) == 0 &&
4525 strcmp(cvd
->vdev_path
+ len
, "/old") == 0) {
4526 spa_strfree(cvd
->vdev_path
);
4527 cvd
->vdev_path
= spa_strdup(vd
->vdev_path
);
4534 * If we are detaching the original disk from a spare, then it implies
4535 * that the spare should become a real disk, and be removed from the
4536 * active spare list for the pool.
4538 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4540 pvd
->vdev_child
[pvd
->vdev_children
- 1]->vdev_isspare
)
4544 * Erase the disk labels so the disk can be used for other things.
4545 * This must be done after all other error cases are handled,
4546 * but before we disembowel vd (so we can still do I/O to it).
4547 * But if we can't do it, don't treat the error as fatal --
4548 * it may be that the unwritability of the disk is the reason
4549 * it's being detached!
4551 error
= vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4554 * Remove vd from its parent and compact the parent's children.
4556 vdev_remove_child(pvd
, vd
);
4557 vdev_compact_children(pvd
);
4560 * Remember one of the remaining children so we can get tvd below.
4562 cvd
= pvd
->vdev_child
[pvd
->vdev_children
- 1];
4565 * If we need to remove the remaining child from the list of hot spares,
4566 * do it now, marking the vdev as no longer a spare in the process.
4567 * We must do this before vdev_remove_parent(), because that can
4568 * change the GUID if it creates a new toplevel GUID. For a similar
4569 * reason, we must remove the spare now, in the same txg as the detach;
4570 * otherwise someone could attach a new sibling, change the GUID, and
4571 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
4574 ASSERT(cvd
->vdev_isspare
);
4575 spa_spare_remove(cvd
);
4576 unspare_guid
= cvd
->vdev_guid
;
4577 (void) spa_vdev_remove(spa
, unspare_guid
, B_TRUE
);
4578 cvd
->vdev_unspare
= B_TRUE
;
4582 * If the parent mirror/replacing vdev only has one child,
4583 * the parent is no longer needed. Remove it from the tree.
4585 if (pvd
->vdev_children
== 1) {
4586 if (pvd
->vdev_ops
== &vdev_spare_ops
)
4587 cvd
->vdev_unspare
= B_FALSE
;
4588 vdev_remove_parent(cvd
);
4589 cvd
->vdev_resilvering
= B_FALSE
;
4594 * We don't set tvd until now because the parent we just removed
4595 * may have been the previous top-level vdev.
4597 tvd
= cvd
->vdev_top
;
4598 ASSERT(tvd
->vdev_parent
== rvd
);
4601 * Reevaluate the parent vdev state.
4603 vdev_propagate_state(cvd
);
4606 * If the 'autoexpand' property is set on the pool then automatically
4607 * try to expand the size of the pool. For example if the device we
4608 * just detached was smaller than the others, it may be possible to
4609 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
4610 * first so that we can obtain the updated sizes of the leaf vdevs.
4612 if (spa
->spa_autoexpand
) {
4614 vdev_expand(tvd
, txg
);
4617 vdev_config_dirty(tvd
);
4620 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
4621 * vd->vdev_detached is set and free vd's DTL object in syncing context.
4622 * But first make sure we're not on any *other* txg's DTL list, to
4623 * prevent vd from being accessed after it's freed.
4625 vdpath
= spa_strdup(vd
->vdev_path
);
4626 for (int t
= 0; t
< TXG_SIZE
; t
++)
4627 (void) txg_list_remove_this(&tvd
->vdev_dtl_list
, vd
, t
);
4628 vd
->vdev_detached
= B_TRUE
;
4629 vdev_dirty(tvd
, VDD_DTL
, vd
, txg
);
4631 spa_event_notify(spa
, vd
, ESC_ZFS_VDEV_REMOVE
);
4633 /* hang on to the spa before we release the lock */
4634 spa_open_ref(spa
, FTAG
);
4636 error
= spa_vdev_exit(spa
, vd
, txg
, 0);
4638 spa_history_log_internal(spa
, "detach", NULL
,
4640 spa_strfree(vdpath
);
4643 * If this was the removal of the original device in a hot spare vdev,
4644 * then we want to go through and remove the device from the hot spare
4645 * list of every other pool.
4648 spa_t
*altspa
= NULL
;
4650 mutex_enter(&spa_namespace_lock
);
4651 while ((altspa
= spa_next(altspa
)) != NULL
) {
4652 if (altspa
->spa_state
!= POOL_STATE_ACTIVE
||
4656 spa_open_ref(altspa
, FTAG
);
4657 mutex_exit(&spa_namespace_lock
);
4658 (void) spa_vdev_remove(altspa
, unspare_guid
, B_TRUE
);
4659 mutex_enter(&spa_namespace_lock
);
4660 spa_close(altspa
, FTAG
);
4662 mutex_exit(&spa_namespace_lock
);
4664 /* search the rest of the vdevs for spares to remove */
4665 spa_vdev_resilver_done(spa
);
4668 /* all done with the spa; OK to release */
4669 mutex_enter(&spa_namespace_lock
);
4670 spa_close(spa
, FTAG
);
4671 mutex_exit(&spa_namespace_lock
);
4677 * Split a set of devices from their mirrors, and create a new pool from them.
4680 spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
4681 nvlist_t
*props
, boolean_t exp
)
4684 uint64_t txg
, *glist
;
4686 uint_t c
, children
, lastlog
;
4687 nvlist_t
**child
, *nvl
, *tmp
;
4689 char *altroot
= NULL
;
4690 vdev_t
*rvd
, **vml
= NULL
; /* vdev modify list */
4691 boolean_t activate_slog
;
4693 ASSERT(spa_writeable(spa
));
4695 txg
= spa_vdev_enter(spa
);
4697 /* clear the log and flush everything up to now */
4698 activate_slog
= spa_passivate_log(spa
);
4699 (void) spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4700 error
= spa_offline_log(spa
);
4701 txg
= spa_vdev_config_enter(spa
);
4704 spa_activate_log(spa
);
4707 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4709 /* check new spa name before going any further */
4710 if (spa_lookup(newname
) != NULL
)
4711 return (spa_vdev_exit(spa
, NULL
, txg
, EEXIST
));
4714 * scan through all the children to ensure they're all mirrors
4716 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
) != 0 ||
4717 nvlist_lookup_nvlist_array(nvl
, ZPOOL_CONFIG_CHILDREN
, &child
,
4719 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4721 /* first, check to ensure we've got the right child count */
4722 rvd
= spa
->spa_root_vdev
;
4724 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
4725 vdev_t
*vd
= rvd
->vdev_child
[c
];
4727 /* don't count the holes & logs as children */
4728 if (vd
->vdev_islog
|| vd
->vdev_ishole
) {
4736 if (children
!= (lastlog
!= 0 ? lastlog
: rvd
->vdev_children
))
4737 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4739 /* next, ensure no spare or cache devices are part of the split */
4740 if (nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_SPARES
, &tmp
) == 0 ||
4741 nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_L2CACHE
, &tmp
) == 0)
4742 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4744 vml
= kmem_zalloc(children
* sizeof (vdev_t
*), KM_SLEEP
);
4745 glist
= kmem_zalloc(children
* sizeof (uint64_t), KM_SLEEP
);
4747 /* then, loop over each vdev and validate it */
4748 for (c
= 0; c
< children
; c
++) {
4749 uint64_t is_hole
= 0;
4751 (void) nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_IS_HOLE
,
4755 if (spa
->spa_root_vdev
->vdev_child
[c
]->vdev_ishole
||
4756 spa
->spa_root_vdev
->vdev_child
[c
]->vdev_islog
) {
4764 /* which disk is going to be split? */
4765 if (nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_GUID
,
4771 /* look it up in the spa */
4772 vml
[c
] = spa_lookup_by_guid(spa
, glist
[c
], B_FALSE
);
4773 if (vml
[c
] == NULL
) {
4778 /* make sure there's nothing stopping the split */
4779 if (vml
[c
]->vdev_parent
->vdev_ops
!= &vdev_mirror_ops
||
4780 vml
[c
]->vdev_islog
||
4781 vml
[c
]->vdev_ishole
||
4782 vml
[c
]->vdev_isspare
||
4783 vml
[c
]->vdev_isl2cache
||
4784 !vdev_writeable(vml
[c
]) ||
4785 vml
[c
]->vdev_children
!= 0 ||
4786 vml
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
||
4787 c
!= spa
->spa_root_vdev
->vdev_child
[c
]->vdev_id
) {
4792 if (vdev_dtl_required(vml
[c
])) {
4797 /* we need certain info from the top level */
4798 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_ARRAY
,
4799 vml
[c
]->vdev_top
->vdev_ms_array
) == 0);
4800 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_SHIFT
,
4801 vml
[c
]->vdev_top
->vdev_ms_shift
) == 0);
4802 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASIZE
,
4803 vml
[c
]->vdev_top
->vdev_asize
) == 0);
4804 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASHIFT
,
4805 vml
[c
]->vdev_top
->vdev_ashift
) == 0);
4809 kmem_free(vml
, children
* sizeof (vdev_t
*));
4810 kmem_free(glist
, children
* sizeof (uint64_t));
4811 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4814 /* stop writers from using the disks */
4815 for (c
= 0; c
< children
; c
++) {
4817 vml
[c
]->vdev_offline
= B_TRUE
;
4819 vdev_reopen(spa
->spa_root_vdev
);
4822 * Temporarily record the splitting vdevs in the spa config. This
4823 * will disappear once the config is regenerated.
4825 VERIFY(nvlist_alloc(&nvl
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4826 VERIFY(nvlist_add_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
4827 glist
, children
) == 0);
4828 kmem_free(glist
, children
* sizeof (uint64_t));
4830 mutex_enter(&spa
->spa_props_lock
);
4831 VERIFY(nvlist_add_nvlist(spa
->spa_config
, ZPOOL_CONFIG_SPLIT
,
4833 mutex_exit(&spa
->spa_props_lock
);
4834 spa
->spa_config_splitting
= nvl
;
4835 vdev_config_dirty(spa
->spa_root_vdev
);
4837 /* configure and create the new pool */
4838 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
, newname
) == 0);
4839 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
4840 exp
? POOL_STATE_EXPORTED
: POOL_STATE_ACTIVE
) == 0);
4841 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
4842 spa_version(spa
)) == 0);
4843 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
4844 spa
->spa_config_txg
) == 0);
4845 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
4846 spa_generate_guid(NULL
)) == 0);
4847 (void) nvlist_lookup_string(props
,
4848 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
4850 /* add the new pool to the namespace */
4851 newspa
= spa_add(newname
, config
, altroot
);
4852 newspa
->spa_config_txg
= spa
->spa_config_txg
;
4853 spa_set_log_state(newspa
, SPA_LOG_CLEAR
);
4855 /* release the spa config lock, retaining the namespace lock */
4856 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4858 if (zio_injection_enabled
)
4859 zio_handle_panic_injection(spa
, FTAG
, 1);
4861 spa_activate(newspa
, spa_mode_global
);
4862 spa_async_suspend(newspa
);
4864 /* create the new pool from the disks of the original pool */
4865 error
= spa_load(newspa
, SPA_LOAD_IMPORT
, SPA_IMPORT_ASSEMBLE
, B_TRUE
);
4869 /* if that worked, generate a real config for the new pool */
4870 if (newspa
->spa_root_vdev
!= NULL
) {
4871 VERIFY(nvlist_alloc(&newspa
->spa_config_splitting
,
4872 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4873 VERIFY(nvlist_add_uint64(newspa
->spa_config_splitting
,
4874 ZPOOL_CONFIG_SPLIT_GUID
, spa_guid(spa
)) == 0);
4875 spa_config_set(newspa
, spa_config_generate(newspa
, NULL
, -1ULL,
4880 if (props
!= NULL
) {
4881 spa_configfile_set(newspa
, props
, B_FALSE
);
4882 error
= spa_prop_set(newspa
, props
);
4887 /* flush everything */
4888 txg
= spa_vdev_config_enter(newspa
);
4889 vdev_config_dirty(newspa
->spa_root_vdev
);
4890 (void) spa_vdev_config_exit(newspa
, NULL
, txg
, 0, FTAG
);
4892 if (zio_injection_enabled
)
4893 zio_handle_panic_injection(spa
, FTAG
, 2);
4895 spa_async_resume(newspa
);
4897 /* finally, update the original pool's config */
4898 txg
= spa_vdev_config_enter(spa
);
4899 tx
= dmu_tx_create_dd(spa_get_dsl(spa
)->dp_mos_dir
);
4900 error
= dmu_tx_assign(tx
, TXG_WAIT
);
4903 for (c
= 0; c
< children
; c
++) {
4904 if (vml
[c
] != NULL
) {
4907 spa_history_log_internal(spa
, "detach", tx
,
4908 "vdev=%s", vml
[c
]->vdev_path
);
4912 vdev_config_dirty(spa
->spa_root_vdev
);
4913 spa
->spa_config_splitting
= NULL
;
4917 (void) spa_vdev_exit(spa
, NULL
, txg
, 0);
4919 if (zio_injection_enabled
)
4920 zio_handle_panic_injection(spa
, FTAG
, 3);
4922 /* split is complete; log a history record */
4923 spa_history_log_internal(newspa
, "split", NULL
,
4924 "from pool %s", spa_name(spa
));
4926 kmem_free(vml
, children
* sizeof (vdev_t
*));
4928 /* if we're not going to mount the filesystems in userland, export */
4930 error
= spa_export_common(newname
, POOL_STATE_EXPORTED
, NULL
,
4937 spa_deactivate(newspa
);
4940 txg
= spa_vdev_config_enter(spa
);
4942 /* re-online all offlined disks */
4943 for (c
= 0; c
< children
; c
++) {
4945 vml
[c
]->vdev_offline
= B_FALSE
;
4947 vdev_reopen(spa
->spa_root_vdev
);
4949 nvlist_free(spa
->spa_config_splitting
);
4950 spa
->spa_config_splitting
= NULL
;
4951 (void) spa_vdev_exit(spa
, NULL
, txg
, error
);
4953 kmem_free(vml
, children
* sizeof (vdev_t
*));
4958 spa_nvlist_lookup_by_guid(nvlist_t
**nvpp
, int count
, uint64_t target_guid
)
4960 for (int i
= 0; i
< count
; i
++) {
4963 VERIFY(nvlist_lookup_uint64(nvpp
[i
], ZPOOL_CONFIG_GUID
,
4966 if (guid
== target_guid
)
4974 spa_vdev_remove_aux(nvlist_t
*config
, char *name
, nvlist_t
**dev
, int count
,
4975 nvlist_t
*dev_to_remove
)
4977 nvlist_t
**newdev
= NULL
;
4980 newdev
= kmem_alloc((count
- 1) * sizeof (void *), KM_SLEEP
);
4982 for (int i
= 0, j
= 0; i
< count
; i
++) {
4983 if (dev
[i
] == dev_to_remove
)
4985 VERIFY(nvlist_dup(dev
[i
], &newdev
[j
++], KM_SLEEP
) == 0);
4988 VERIFY(nvlist_remove(config
, name
, DATA_TYPE_NVLIST_ARRAY
) == 0);
4989 VERIFY(nvlist_add_nvlist_array(config
, name
, newdev
, count
- 1) == 0);
4991 for (int i
= 0; i
< count
- 1; i
++)
4992 nvlist_free(newdev
[i
]);
4995 kmem_free(newdev
, (count
- 1) * sizeof (void *));
4999 * Evacuate the device.
5002 spa_vdev_remove_evacuate(spa_t
*spa
, vdev_t
*vd
)
5007 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
5008 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5009 ASSERT(vd
== vd
->vdev_top
);
5012 * Evacuate the device. We don't hold the config lock as writer
5013 * since we need to do I/O but we do keep the
5014 * spa_namespace_lock held. Once this completes the device
5015 * should no longer have any blocks allocated on it.
5017 if (vd
->vdev_islog
) {
5018 if (vd
->vdev_stat
.vs_alloc
!= 0)
5019 error
= spa_offline_log(spa
);
5028 * The evacuation succeeded. Remove any remaining MOS metadata
5029 * associated with this vdev, and wait for these changes to sync.
5031 ASSERT0(vd
->vdev_stat
.vs_alloc
);
5032 txg
= spa_vdev_config_enter(spa
);
5033 vd
->vdev_removing
= B_TRUE
;
5034 vdev_dirty(vd
, 0, NULL
, txg
);
5035 vdev_config_dirty(vd
);
5036 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
5042 * Complete the removal by cleaning up the namespace.
5045 spa_vdev_remove_from_namespace(spa_t
*spa
, vdev_t
*vd
)
5047 vdev_t
*rvd
= spa
->spa_root_vdev
;
5048 uint64_t id
= vd
->vdev_id
;
5049 boolean_t last_vdev
= (id
== (rvd
->vdev_children
- 1));
5051 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
5052 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
5053 ASSERT(vd
== vd
->vdev_top
);
5056 * Only remove any devices which are empty.
5058 if (vd
->vdev_stat
.vs_alloc
!= 0)
5061 (void) vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
5063 if (list_link_active(&vd
->vdev_state_dirty_node
))
5064 vdev_state_clean(vd
);
5065 if (list_link_active(&vd
->vdev_config_dirty_node
))
5066 vdev_config_clean(vd
);
5071 vdev_compact_children(rvd
);
5073 vd
= vdev_alloc_common(spa
, id
, 0, &vdev_hole_ops
);
5074 vdev_add_child(rvd
, vd
);
5076 vdev_config_dirty(rvd
);
5079 * Reassess the health of our root vdev.
5085 * Remove a device from the pool -
5087 * Removing a device from the vdev namespace requires several steps
5088 * and can take a significant amount of time. As a result we use
5089 * the spa_vdev_config_[enter/exit] functions which allow us to
5090 * grab and release the spa_config_lock while still holding the namespace
5091 * lock. During each step the configuration is synced out.
5095 * Remove a device from the pool. Currently, this supports removing only hot
5096 * spares, slogs, and level 2 ARC devices.
5099 spa_vdev_remove(spa_t
*spa
, uint64_t guid
, boolean_t unspare
)
5102 metaslab_group_t
*mg
;
5103 nvlist_t
**spares
, **l2cache
, *nv
;
5105 uint_t nspares
, nl2cache
;
5107 boolean_t locked
= MUTEX_HELD(&spa_namespace_lock
);
5109 ASSERT(spa_writeable(spa
));
5112 txg
= spa_vdev_enter(spa
);
5114 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
5116 if (spa
->spa_spares
.sav_vdevs
!= NULL
&&
5117 nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
5118 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0 &&
5119 (nv
= spa_nvlist_lookup_by_guid(spares
, nspares
, guid
)) != NULL
) {
5121 * Only remove the hot spare if it's not currently in use
5124 if (vd
== NULL
|| unspare
) {
5125 spa_vdev_remove_aux(spa
->spa_spares
.sav_config
,
5126 ZPOOL_CONFIG_SPARES
, spares
, nspares
, nv
);
5127 spa_load_spares(spa
);
5128 spa
->spa_spares
.sav_sync
= B_TRUE
;
5132 } else if (spa
->spa_l2cache
.sav_vdevs
!= NULL
&&
5133 nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
5134 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0 &&
5135 (nv
= spa_nvlist_lookup_by_guid(l2cache
, nl2cache
, guid
)) != NULL
) {
5137 * Cache devices can always be removed.
5139 spa_vdev_remove_aux(spa
->spa_l2cache
.sav_config
,
5140 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
, nv
);
5141 spa_load_l2cache(spa
);
5142 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
5143 } else if (vd
!= NULL
&& vd
->vdev_islog
) {
5145 ASSERT(vd
== vd
->vdev_top
);
5148 * XXX - Once we have bp-rewrite this should
5149 * become the common case.
5155 * Stop allocating from this vdev.
5157 metaslab_group_passivate(mg
);
5160 * Wait for the youngest allocations and frees to sync,
5161 * and then wait for the deferral of those frees to finish.
5163 spa_vdev_config_exit(spa
, NULL
,
5164 txg
+ TXG_CONCURRENT_STATES
+ TXG_DEFER_SIZE
, 0, FTAG
);
5167 * Attempt to evacuate the vdev.
5169 error
= spa_vdev_remove_evacuate(spa
, vd
);
5171 txg
= spa_vdev_config_enter(spa
);
5174 * If we couldn't evacuate the vdev, unwind.
5177 metaslab_group_activate(mg
);
5178 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5182 * Clean up the vdev namespace.
5184 spa_vdev_remove_from_namespace(spa
, vd
);
5186 } else if (vd
!= NULL
) {
5188 * Normal vdevs cannot be removed (yet).
5193 * There is no vdev of any kind with the specified guid.
5199 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5205 * Find any device that's done replacing, or a vdev marked 'unspare' that's
5206 * current spared, so we can detach it.
5209 spa_vdev_resilver_done_hunt(vdev_t
*vd
)
5211 vdev_t
*newvd
, *oldvd
;
5213 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
5214 oldvd
= spa_vdev_resilver_done_hunt(vd
->vdev_child
[c
]);
5220 * Check for a completed replacement. We always consider the first
5221 * vdev in the list to be the oldest vdev, and the last one to be
5222 * the newest (see spa_vdev_attach() for how that works). In
5223 * the case where the newest vdev is faulted, we will not automatically
5224 * remove it after a resilver completes. This is OK as it will require
5225 * user intervention to determine which disk the admin wishes to keep.
5227 if (vd
->vdev_ops
== &vdev_replacing_ops
) {
5228 ASSERT(vd
->vdev_children
> 1);
5230 newvd
= vd
->vdev_child
[vd
->vdev_children
- 1];
5231 oldvd
= vd
->vdev_child
[0];
5233 if (vdev_dtl_empty(newvd
, DTL_MISSING
) &&
5234 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
5235 !vdev_dtl_required(oldvd
))
5240 * Check for a completed resilver with the 'unspare' flag set.
5242 if (vd
->vdev_ops
== &vdev_spare_ops
) {
5243 vdev_t
*first
= vd
->vdev_child
[0];
5244 vdev_t
*last
= vd
->vdev_child
[vd
->vdev_children
- 1];
5246 if (last
->vdev_unspare
) {
5249 } else if (first
->vdev_unspare
) {
5256 if (oldvd
!= NULL
&&
5257 vdev_dtl_empty(newvd
, DTL_MISSING
) &&
5258 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
5259 !vdev_dtl_required(oldvd
))
5263 * If there are more than two spares attached to a disk,
5264 * and those spares are not required, then we want to
5265 * attempt to free them up now so that they can be used
5266 * by other pools. Once we're back down to a single
5267 * disk+spare, we stop removing them.
5269 if (vd
->vdev_children
> 2) {
5270 newvd
= vd
->vdev_child
[1];
5272 if (newvd
->vdev_isspare
&& last
->vdev_isspare
&&
5273 vdev_dtl_empty(last
, DTL_MISSING
) &&
5274 vdev_dtl_empty(last
, DTL_OUTAGE
) &&
5275 !vdev_dtl_required(newvd
))
5284 spa_vdev_resilver_done(spa_t
*spa
)
5286 vdev_t
*vd
, *pvd
, *ppvd
;
5287 uint64_t guid
, sguid
, pguid
, ppguid
;
5289 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5291 while ((vd
= spa_vdev_resilver_done_hunt(spa
->spa_root_vdev
)) != NULL
) {
5292 pvd
= vd
->vdev_parent
;
5293 ppvd
= pvd
->vdev_parent
;
5294 guid
= vd
->vdev_guid
;
5295 pguid
= pvd
->vdev_guid
;
5296 ppguid
= ppvd
->vdev_guid
;
5299 * If we have just finished replacing a hot spared device, then
5300 * we need to detach the parent's first child (the original hot
5303 if (ppvd
->vdev_ops
== &vdev_spare_ops
&& pvd
->vdev_id
== 0 &&
5304 ppvd
->vdev_children
== 2) {
5305 ASSERT(pvd
->vdev_ops
== &vdev_replacing_ops
);
5306 sguid
= ppvd
->vdev_child
[1]->vdev_guid
;
5308 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5309 if (spa_vdev_detach(spa
, guid
, pguid
, B_TRUE
) != 0)
5311 if (sguid
&& spa_vdev_detach(spa
, sguid
, ppguid
, B_TRUE
) != 0)
5313 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5316 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5320 * Update the stored path or FRU for this vdev.
5323 spa_vdev_set_common(spa_t
*spa
, uint64_t guid
, const char *value
,
5327 boolean_t sync
= B_FALSE
;
5329 ASSERT(spa_writeable(spa
));
5331 spa_vdev_state_enter(spa
, SCL_ALL
);
5333 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
5334 return (spa_vdev_state_exit(spa
, NULL
, ENOENT
));
5336 if (!vd
->vdev_ops
->vdev_op_leaf
)
5337 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
5340 if (strcmp(value
, vd
->vdev_path
) != 0) {
5341 spa_strfree(vd
->vdev_path
);
5342 vd
->vdev_path
= spa_strdup(value
);
5346 if (vd
->vdev_fru
== NULL
) {
5347 vd
->vdev_fru
= spa_strdup(value
);
5349 } else if (strcmp(value
, vd
->vdev_fru
) != 0) {
5350 spa_strfree(vd
->vdev_fru
);
5351 vd
->vdev_fru
= spa_strdup(value
);
5356 return (spa_vdev_state_exit(spa
, sync
? vd
: NULL
, 0));
5360 spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
)
5362 return (spa_vdev_set_common(spa
, guid
, newpath
, B_TRUE
));
5366 spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
)
5368 return (spa_vdev_set_common(spa
, guid
, newfru
, B_FALSE
));
5372 * ==========================================================================
5374 * ==========================================================================
5378 spa_scan_stop(spa_t
*spa
)
5380 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5381 if (dsl_scan_resilvering(spa
->spa_dsl_pool
))
5383 return (dsl_scan_cancel(spa
->spa_dsl_pool
));
5387 spa_scan(spa_t
*spa
, pool_scan_func_t func
)
5389 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5391 if (func
>= POOL_SCAN_FUNCS
|| func
== POOL_SCAN_NONE
)
5395 * If a resilver was requested, but there is no DTL on a
5396 * writeable leaf device, we have nothing to do.
5398 if (func
== POOL_SCAN_RESILVER
&&
5399 !vdev_resilver_needed(spa
->spa_root_vdev
, NULL
, NULL
)) {
5400 spa_async_request(spa
, SPA_ASYNC_RESILVER_DONE
);
5404 return (dsl_scan(spa
->spa_dsl_pool
, func
));
5408 * ==========================================================================
5409 * SPA async task processing
5410 * ==========================================================================
5414 spa_async_remove(spa_t
*spa
, vdev_t
*vd
)
5416 if (vd
->vdev_remove_wanted
) {
5417 vd
->vdev_remove_wanted
= B_FALSE
;
5418 vd
->vdev_delayed_close
= B_FALSE
;
5419 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_REMOVED
, VDEV_AUX_NONE
);
5422 * We want to clear the stats, but we don't want to do a full
5423 * vdev_clear() as that will cause us to throw away
5424 * degraded/faulted state as well as attempt to reopen the
5425 * device, all of which is a waste.
5427 vd
->vdev_stat
.vs_read_errors
= 0;
5428 vd
->vdev_stat
.vs_write_errors
= 0;
5429 vd
->vdev_stat
.vs_checksum_errors
= 0;
5431 vdev_state_dirty(vd
->vdev_top
);
5434 for (int c
= 0; c
< vd
->vdev_children
; c
++)
5435 spa_async_remove(spa
, vd
->vdev_child
[c
]);
5439 spa_async_probe(spa_t
*spa
, vdev_t
*vd
)
5441 if (vd
->vdev_probe_wanted
) {
5442 vd
->vdev_probe_wanted
= B_FALSE
;
5443 vdev_reopen(vd
); /* vdev_open() does the actual probe */
5446 for (int c
= 0; c
< vd
->vdev_children
; c
++)
5447 spa_async_probe(spa
, vd
->vdev_child
[c
]);
5451 spa_async_autoexpand(spa_t
*spa
, vdev_t
*vd
)
5457 if (!spa
->spa_autoexpand
)
5460 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
5461 vdev_t
*cvd
= vd
->vdev_child
[c
];
5462 spa_async_autoexpand(spa
, cvd
);
5465 if (!vd
->vdev_ops
->vdev_op_leaf
|| vd
->vdev_physpath
== NULL
)
5468 physpath
= kmem_zalloc(MAXPATHLEN
, KM_SLEEP
);
5469 (void) snprintf(physpath
, MAXPATHLEN
, "/devices%s", vd
->vdev_physpath
);
5471 VERIFY(nvlist_alloc(&attr
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5472 VERIFY(nvlist_add_string(attr
, DEV_PHYS_PATH
, physpath
) == 0);
5474 (void) ddi_log_sysevent(zfs_dip
, SUNW_VENDOR
, EC_DEV_STATUS
,
5475 ESC_DEV_DLE
, attr
, &eid
, DDI_SLEEP
);
5478 kmem_free(physpath
, MAXPATHLEN
);
5482 spa_async_thread(spa_t
*spa
)
5486 ASSERT(spa
->spa_sync_on
);
5488 mutex_enter(&spa
->spa_async_lock
);
5489 tasks
= spa
->spa_async_tasks
;
5490 spa
->spa_async_tasks
= 0;
5491 mutex_exit(&spa
->spa_async_lock
);
5494 * See if the config needs to be updated.
5496 if (tasks
& SPA_ASYNC_CONFIG_UPDATE
) {
5497 uint64_t old_space
, new_space
;
5499 mutex_enter(&spa_namespace_lock
);
5500 old_space
= metaslab_class_get_space(spa_normal_class(spa
));
5501 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
5502 new_space
= metaslab_class_get_space(spa_normal_class(spa
));
5503 mutex_exit(&spa_namespace_lock
);
5506 * If the pool grew as a result of the config update,
5507 * then log an internal history event.
5509 if (new_space
!= old_space
) {
5510 spa_history_log_internal(spa
, "vdev online", NULL
,
5511 "pool '%s' size: %llu(+%llu)",
5512 spa_name(spa
), new_space
, new_space
- old_space
);
5517 * See if any devices need to be marked REMOVED.
5519 if (tasks
& SPA_ASYNC_REMOVE
) {
5520 spa_vdev_state_enter(spa
, SCL_NONE
);
5521 spa_async_remove(spa
, spa
->spa_root_vdev
);
5522 for (int i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
5523 spa_async_remove(spa
, spa
->spa_l2cache
.sav_vdevs
[i
]);
5524 for (int i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
5525 spa_async_remove(spa
, spa
->spa_spares
.sav_vdevs
[i
]);
5526 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5529 if ((tasks
& SPA_ASYNC_AUTOEXPAND
) && !spa_suspended(spa
)) {
5530 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5531 spa_async_autoexpand(spa
, spa
->spa_root_vdev
);
5532 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5536 * See if any devices need to be probed.
5538 if (tasks
& SPA_ASYNC_PROBE
) {
5539 spa_vdev_state_enter(spa
, SCL_NONE
);
5540 spa_async_probe(spa
, spa
->spa_root_vdev
);
5541 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5545 * If any devices are done replacing, detach them.
5547 if (tasks
& SPA_ASYNC_RESILVER_DONE
)
5548 spa_vdev_resilver_done(spa
);
5551 * Kick off a resilver.
5553 if (tasks
& SPA_ASYNC_RESILVER
)
5554 dsl_resilver_restart(spa
->spa_dsl_pool
, 0);
5557 * Let the world know that we're done.
5559 mutex_enter(&spa
->spa_async_lock
);
5560 spa
->spa_async_thread
= NULL
;
5561 cv_broadcast(&spa
->spa_async_cv
);
5562 mutex_exit(&spa
->spa_async_lock
);
5567 spa_async_suspend(spa_t
*spa
)
5569 mutex_enter(&spa
->spa_async_lock
);
5570 spa
->spa_async_suspended
++;
5571 while (spa
->spa_async_thread
!= NULL
)
5572 cv_wait(&spa
->spa_async_cv
, &spa
->spa_async_lock
);
5573 mutex_exit(&spa
->spa_async_lock
);
5577 spa_async_resume(spa_t
*spa
)
5579 mutex_enter(&spa
->spa_async_lock
);
5580 ASSERT(spa
->spa_async_suspended
!= 0);
5581 spa
->spa_async_suspended
--;
5582 mutex_exit(&spa
->spa_async_lock
);
5586 spa_async_dispatch(spa_t
*spa
)
5588 mutex_enter(&spa
->spa_async_lock
);
5589 if (spa
->spa_async_tasks
&& !spa
->spa_async_suspended
&&
5590 spa
->spa_async_thread
== NULL
&&
5591 rootdir
!= NULL
&& !vn_is_readonly(rootdir
))
5592 spa
->spa_async_thread
= thread_create(NULL
, 0,
5593 spa_async_thread
, spa
, 0, &p0
, TS_RUN
, maxclsyspri
);
5594 mutex_exit(&spa
->spa_async_lock
);
5598 spa_async_request(spa_t
*spa
, int task
)
5600 zfs_dbgmsg("spa=%s async request task=%u", spa
->spa_name
, task
);
5601 mutex_enter(&spa
->spa_async_lock
);
5602 spa
->spa_async_tasks
|= task
;
5603 mutex_exit(&spa
->spa_async_lock
);
5607 * ==========================================================================
5608 * SPA syncing routines
5609 * ==========================================================================
5613 bpobj_enqueue_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5616 bpobj_enqueue(bpo
, bp
, tx
);
5621 spa_free_sync_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5625 zio_nowait(zio_free_sync(zio
, zio
->io_spa
, dmu_tx_get_txg(tx
), bp
,
5631 spa_sync_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
*nv
, dmu_tx_t
*tx
)
5633 char *packed
= NULL
;
5638 VERIFY(nvlist_size(nv
, &nvsize
, NV_ENCODE_XDR
) == 0);
5641 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
5642 * information. This avoids the dbuf_will_dirty() path and
5643 * saves us a pre-read to get data we don't actually care about.
5645 bufsize
= P2ROUNDUP((uint64_t)nvsize
, SPA_CONFIG_BLOCKSIZE
);
5646 packed
= kmem_alloc(bufsize
, KM_SLEEP
);
5648 VERIFY(nvlist_pack(nv
, &packed
, &nvsize
, NV_ENCODE_XDR
,
5650 bzero(packed
+ nvsize
, bufsize
- nvsize
);
5652 dmu_write(spa
->spa_meta_objset
, obj
, 0, bufsize
, packed
, tx
);
5654 kmem_free(packed
, bufsize
);
5656 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
5657 dmu_buf_will_dirty(db
, tx
);
5658 *(uint64_t *)db
->db_data
= nvsize
;
5659 dmu_buf_rele(db
, FTAG
);
5663 spa_sync_aux_dev(spa_t
*spa
, spa_aux_vdev_t
*sav
, dmu_tx_t
*tx
,
5664 const char *config
, const char *entry
)
5674 * Update the MOS nvlist describing the list of available devices.
5675 * spa_validate_aux() will have already made sure this nvlist is
5676 * valid and the vdevs are labeled appropriately.
5678 if (sav
->sav_object
== 0) {
5679 sav
->sav_object
= dmu_object_alloc(spa
->spa_meta_objset
,
5680 DMU_OT_PACKED_NVLIST
, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE
,
5681 sizeof (uint64_t), tx
);
5682 VERIFY(zap_update(spa
->spa_meta_objset
,
5683 DMU_POOL_DIRECTORY_OBJECT
, entry
, sizeof (uint64_t), 1,
5684 &sav
->sav_object
, tx
) == 0);
5687 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5688 if (sav
->sav_count
== 0) {
5689 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, NULL
, 0) == 0);
5691 list
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
5692 for (i
= 0; i
< sav
->sav_count
; i
++)
5693 list
[i
] = vdev_config_generate(spa
, sav
->sav_vdevs
[i
],
5694 B_FALSE
, VDEV_CONFIG_L2CACHE
);
5695 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, list
,
5696 sav
->sav_count
) == 0);
5697 for (i
= 0; i
< sav
->sav_count
; i
++)
5698 nvlist_free(list
[i
]);
5699 kmem_free(list
, sav
->sav_count
* sizeof (void *));
5702 spa_sync_nvlist(spa
, sav
->sav_object
, nvroot
, tx
);
5703 nvlist_free(nvroot
);
5705 sav
->sav_sync
= B_FALSE
;
5709 spa_sync_config_object(spa_t
*spa
, dmu_tx_t
*tx
)
5713 if (list_is_empty(&spa
->spa_config_dirty_list
))
5716 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5718 config
= spa_config_generate(spa
, spa
->spa_root_vdev
,
5719 dmu_tx_get_txg(tx
), B_FALSE
);
5722 * If we're upgrading the spa version then make sure that
5723 * the config object gets updated with the correct version.
5725 if (spa
->spa_ubsync
.ub_version
< spa
->spa_uberblock
.ub_version
)
5726 fnvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
5727 spa
->spa_uberblock
.ub_version
);
5729 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5731 if (spa
->spa_config_syncing
)
5732 nvlist_free(spa
->spa_config_syncing
);
5733 spa
->spa_config_syncing
= config
;
5735 spa_sync_nvlist(spa
, spa
->spa_config_object
, config
, tx
);
5739 spa_sync_version(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
5742 uint64_t version
= *(uint64_t *)arg2
;
5745 * Setting the version is special cased when first creating the pool.
5747 ASSERT(tx
->tx_txg
!= TXG_INITIAL
);
5749 ASSERT(version
<= SPA_VERSION
);
5750 ASSERT(version
>= spa_version(spa
));
5752 spa
->spa_uberblock
.ub_version
= version
;
5753 vdev_config_dirty(spa
->spa_root_vdev
);
5754 spa_history_log_internal(spa
, "set", tx
, "version=%lld", version
);
5758 * Set zpool properties.
5761 spa_sync_props(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
5764 objset_t
*mos
= spa
->spa_meta_objset
;
5765 nvlist_t
*nvp
= arg2
;
5766 nvpair_t
*elem
= NULL
;
5768 mutex_enter(&spa
->spa_props_lock
);
5770 while ((elem
= nvlist_next_nvpair(nvp
, elem
))) {
5772 char *strval
, *fname
;
5774 const char *propname
;
5775 zprop_type_t proptype
;
5776 zfeature_info_t
*feature
;
5778 switch (prop
= zpool_name_to_prop(nvpair_name(elem
))) {
5781 * We checked this earlier in spa_prop_validate().
5783 ASSERT(zpool_prop_feature(nvpair_name(elem
)));
5785 fname
= strchr(nvpair_name(elem
), '@') + 1;
5786 VERIFY3U(0, ==, zfeature_lookup_name(fname
, &feature
));
5788 spa_feature_enable(spa
, feature
, tx
);
5789 spa_history_log_internal(spa
, "set", tx
,
5790 "%s=enabled", nvpair_name(elem
));
5793 case ZPOOL_PROP_VERSION
:
5794 VERIFY(nvpair_value_uint64(elem
, &intval
) == 0);
5796 * The version is synced seperatly before other
5797 * properties and should be correct by now.
5799 ASSERT3U(spa_version(spa
), >=, intval
);
5802 case ZPOOL_PROP_ALTROOT
:
5804 * 'altroot' is a non-persistent property. It should
5805 * have been set temporarily at creation or import time.
5807 ASSERT(spa
->spa_root
!= NULL
);
5810 case ZPOOL_PROP_READONLY
:
5811 case ZPOOL_PROP_CACHEFILE
:
5813 * 'readonly' and 'cachefile' are also non-persisitent
5817 case ZPOOL_PROP_COMMENT
:
5818 VERIFY(nvpair_value_string(elem
, &strval
) == 0);
5819 if (spa
->spa_comment
!= NULL
)
5820 spa_strfree(spa
->spa_comment
);
5821 spa
->spa_comment
= spa_strdup(strval
);
5823 * We need to dirty the configuration on all the vdevs
5824 * so that their labels get updated. It's unnecessary
5825 * to do this for pool creation since the vdev's
5826 * configuratoin has already been dirtied.
5828 if (tx
->tx_txg
!= TXG_INITIAL
)
5829 vdev_config_dirty(spa
->spa_root_vdev
);
5830 spa_history_log_internal(spa
, "set", tx
,
5831 "%s=%s", nvpair_name(elem
), strval
);
5835 * Set pool property values in the poolprops mos object.
5837 if (spa
->spa_pool_props_object
== 0) {
5838 spa
->spa_pool_props_object
=
5839 zap_create_link(mos
, DMU_OT_POOL_PROPS
,
5840 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_PROPS
,
5844 /* normalize the property name */
5845 propname
= zpool_prop_to_name(prop
);
5846 proptype
= zpool_prop_get_type(prop
);
5848 if (nvpair_type(elem
) == DATA_TYPE_STRING
) {
5849 ASSERT(proptype
== PROP_TYPE_STRING
);
5850 VERIFY(nvpair_value_string(elem
, &strval
) == 0);
5851 VERIFY(zap_update(mos
,
5852 spa
->spa_pool_props_object
, propname
,
5853 1, strlen(strval
) + 1, strval
, tx
) == 0);
5854 spa_history_log_internal(spa
, "set", tx
,
5855 "%s=%s", nvpair_name(elem
), strval
);
5856 } else if (nvpair_type(elem
) == DATA_TYPE_UINT64
) {
5857 VERIFY(nvpair_value_uint64(elem
, &intval
) == 0);
5859 if (proptype
== PROP_TYPE_INDEX
) {
5861 VERIFY(zpool_prop_index_to_string(
5862 prop
, intval
, &unused
) == 0);
5864 VERIFY(zap_update(mos
,
5865 spa
->spa_pool_props_object
, propname
,
5866 8, 1, &intval
, tx
) == 0);
5867 spa_history_log_internal(spa
, "set", tx
,
5868 "%s=%lld", nvpair_name(elem
), intval
);
5870 ASSERT(0); /* not allowed */
5874 case ZPOOL_PROP_DELEGATION
:
5875 spa
->spa_delegation
= intval
;
5877 case ZPOOL_PROP_BOOTFS
:
5878 spa
->spa_bootfs
= intval
;
5880 case ZPOOL_PROP_FAILUREMODE
:
5881 spa
->spa_failmode
= intval
;
5883 case ZPOOL_PROP_AUTOEXPAND
:
5884 spa
->spa_autoexpand
= intval
;
5885 if (tx
->tx_txg
!= TXG_INITIAL
)
5886 spa_async_request(spa
,
5887 SPA_ASYNC_AUTOEXPAND
);
5889 case ZPOOL_PROP_DEDUPDITTO
:
5890 spa
->spa_dedup_ditto
= intval
;
5899 mutex_exit(&spa
->spa_props_lock
);
5903 * Perform one-time upgrade on-disk changes. spa_version() does not
5904 * reflect the new version this txg, so there must be no changes this
5905 * txg to anything that the upgrade code depends on after it executes.
5906 * Therefore this must be called after dsl_pool_sync() does the sync
5910 spa_sync_upgrades(spa_t
*spa
, dmu_tx_t
*tx
)
5912 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5914 ASSERT(spa
->spa_sync_pass
== 1);
5916 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_ORIGIN
&&
5917 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_ORIGIN
) {
5918 dsl_pool_create_origin(dp
, tx
);
5920 /* Keeping the origin open increases spa_minref */
5921 spa
->spa_minref
+= 3;
5924 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_NEXT_CLONES
&&
5925 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_NEXT_CLONES
) {
5926 dsl_pool_upgrade_clones(dp
, tx
);
5929 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_DIR_CLONES
&&
5930 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_DIR_CLONES
) {
5931 dsl_pool_upgrade_dir_clones(dp
, tx
);
5933 /* Keeping the freedir open increases spa_minref */
5934 spa
->spa_minref
+= 3;
5937 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_FEATURES
&&
5938 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_FEATURES
) {
5939 spa_feature_create_zap_objects(spa
, tx
);
5944 * Sync the specified transaction group. New blocks may be dirtied as
5945 * part of the process, so we iterate until it converges.
5948 spa_sync(spa_t
*spa
, uint64_t txg
)
5950 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5951 objset_t
*mos
= spa
->spa_meta_objset
;
5952 bpobj_t
*defer_bpo
= &spa
->spa_deferred_bpobj
;
5953 bplist_t
*free_bpl
= &spa
->spa_free_bplist
[txg
& TXG_MASK
];
5954 vdev_t
*rvd
= spa
->spa_root_vdev
;
5959 VERIFY(spa_writeable(spa
));
5962 * Lock out configuration changes.
5964 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5966 spa
->spa_syncing_txg
= txg
;
5967 spa
->spa_sync_pass
= 0;
5970 * If there are any pending vdev state changes, convert them
5971 * into config changes that go out with this transaction group.
5973 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5974 while (list_head(&spa
->spa_state_dirty_list
) != NULL
) {
5976 * We need the write lock here because, for aux vdevs,
5977 * calling vdev_config_dirty() modifies sav_config.
5978 * This is ugly and will become unnecessary when we
5979 * eliminate the aux vdev wart by integrating all vdevs
5980 * into the root vdev tree.
5982 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5983 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_WRITER
);
5984 while ((vd
= list_head(&spa
->spa_state_dirty_list
)) != NULL
) {
5985 vdev_state_clean(vd
);
5986 vdev_config_dirty(vd
);
5988 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5989 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_READER
);
5991 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5993 tx
= dmu_tx_create_assigned(dp
, txg
);
5995 spa
->spa_sync_starttime
= gethrtime();
5996 VERIFY(cyclic_reprogram(spa
->spa_deadman_cycid
,
5997 spa
->spa_sync_starttime
+ spa
->spa_deadman_synctime
));
6000 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
6001 * set spa_deflate if we have no raid-z vdevs.
6003 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_RAIDZ_DEFLATE
&&
6004 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
6007 for (i
= 0; i
< rvd
->vdev_children
; i
++) {
6008 vd
= rvd
->vdev_child
[i
];
6009 if (vd
->vdev_deflate_ratio
!= SPA_MINBLOCKSIZE
)
6012 if (i
== rvd
->vdev_children
) {
6013 spa
->spa_deflate
= TRUE
;
6014 VERIFY(0 == zap_add(spa
->spa_meta_objset
,
6015 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
6016 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
));
6021 * If anything has changed in this txg, or if someone is waiting
6022 * for this txg to sync (eg, spa_vdev_remove()), push the
6023 * deferred frees from the previous txg. If not, leave them
6024 * alone so that we don't generate work on an otherwise idle
6027 if (!txg_list_empty(&dp
->dp_dirty_datasets
, txg
) ||
6028 !txg_list_empty(&dp
->dp_dirty_dirs
, txg
) ||
6029 !txg_list_empty(&dp
->dp_sync_tasks
, txg
) ||
6030 ((dsl_scan_active(dp
->dp_scan
) ||
6031 txg_sync_waiting(dp
)) && !spa_shutting_down(spa
))) {
6032 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
6033 VERIFY3U(bpobj_iterate(defer_bpo
,
6034 spa_free_sync_cb
, zio
, tx
), ==, 0);
6035 VERIFY0(zio_wait(zio
));
6039 * Iterate to convergence.
6042 int pass
= ++spa
->spa_sync_pass
;
6044 spa_sync_config_object(spa
, tx
);
6045 spa_sync_aux_dev(spa
, &spa
->spa_spares
, tx
,
6046 ZPOOL_CONFIG_SPARES
, DMU_POOL_SPARES
);
6047 spa_sync_aux_dev(spa
, &spa
->spa_l2cache
, tx
,
6048 ZPOOL_CONFIG_L2CACHE
, DMU_POOL_L2CACHE
);
6049 spa_errlog_sync(spa
, txg
);
6050 dsl_pool_sync(dp
, txg
);
6052 if (pass
< zfs_sync_pass_deferred_free
) {
6053 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
6054 bplist_iterate(free_bpl
, spa_free_sync_cb
,
6056 VERIFY(zio_wait(zio
) == 0);
6058 bplist_iterate(free_bpl
, bpobj_enqueue_cb
,
6063 dsl_scan_sync(dp
, tx
);
6065 while (vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, txg
))
6069 spa_sync_upgrades(spa
, tx
);
6071 } while (dmu_objset_is_dirty(mos
, txg
));
6074 * Rewrite the vdev configuration (which includes the uberblock)
6075 * to commit the transaction group.
6077 * If there are no dirty vdevs, we sync the uberblock to a few
6078 * random top-level vdevs that are known to be visible in the
6079 * config cache (see spa_vdev_add() for a complete description).
6080 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
6084 * We hold SCL_STATE to prevent vdev open/close/etc.
6085 * while we're attempting to write the vdev labels.
6087 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
6089 if (list_is_empty(&spa
->spa_config_dirty_list
)) {
6090 vdev_t
*svd
[SPA_DVAS_PER_BP
];
6092 int children
= rvd
->vdev_children
;
6093 int c0
= spa_get_random(children
);
6095 for (int c
= 0; c
< children
; c
++) {
6096 vd
= rvd
->vdev_child
[(c0
+ c
) % children
];
6097 if (vd
->vdev_ms_array
== 0 || vd
->vdev_islog
)
6099 svd
[svdcount
++] = vd
;
6100 if (svdcount
== SPA_DVAS_PER_BP
)
6103 error
= vdev_config_sync(svd
, svdcount
, txg
, B_FALSE
);
6105 error
= vdev_config_sync(svd
, svdcount
, txg
,
6108 error
= vdev_config_sync(rvd
->vdev_child
,
6109 rvd
->vdev_children
, txg
, B_FALSE
);
6111 error
= vdev_config_sync(rvd
->vdev_child
,
6112 rvd
->vdev_children
, txg
, B_TRUE
);
6116 spa
->spa_last_synced_guid
= rvd
->vdev_guid
;
6118 spa_config_exit(spa
, SCL_STATE
, FTAG
);
6122 zio_suspend(spa
, NULL
);
6123 zio_resume_wait(spa
);
6127 VERIFY(cyclic_reprogram(spa
->spa_deadman_cycid
, CY_INFINITY
));
6130 * Clear the dirty config list.
6132 while ((vd
= list_head(&spa
->spa_config_dirty_list
)) != NULL
)
6133 vdev_config_clean(vd
);
6136 * Now that the new config has synced transactionally,
6137 * let it become visible to the config cache.
6139 if (spa
->spa_config_syncing
!= NULL
) {
6140 spa_config_set(spa
, spa
->spa_config_syncing
);
6141 spa
->spa_config_txg
= txg
;
6142 spa
->spa_config_syncing
= NULL
;
6145 spa
->spa_ubsync
= spa
->spa_uberblock
;
6147 dsl_pool_sync_done(dp
, txg
);
6150 * Update usable space statistics.
6152 while (vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, TXG_CLEAN(txg
)))
6153 vdev_sync_done(vd
, txg
);
6155 spa_update_dspace(spa
);
6158 * It had better be the case that we didn't dirty anything
6159 * since vdev_config_sync().
6161 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
, txg
));
6162 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
6163 ASSERT(txg_list_empty(&spa
->spa_vdev_txg_list
, txg
));
6165 spa
->spa_sync_pass
= 0;
6167 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
6169 spa_handle_ignored_writes(spa
);
6172 * If any async tasks have been requested, kick them off.
6174 spa_async_dispatch(spa
);
6178 * Sync all pools. We don't want to hold the namespace lock across these
6179 * operations, so we take a reference on the spa_t and drop the lock during the
6183 spa_sync_allpools(void)
6186 mutex_enter(&spa_namespace_lock
);
6187 while ((spa
= spa_next(spa
)) != NULL
) {
6188 if (spa_state(spa
) != POOL_STATE_ACTIVE
||
6189 !spa_writeable(spa
) || spa_suspended(spa
))
6191 spa_open_ref(spa
, FTAG
);
6192 mutex_exit(&spa_namespace_lock
);
6193 txg_wait_synced(spa_get_dsl(spa
), 0);
6194 mutex_enter(&spa_namespace_lock
);
6195 spa_close(spa
, FTAG
);
6197 mutex_exit(&spa_namespace_lock
);
6201 * ==========================================================================
6202 * Miscellaneous routines
6203 * ==========================================================================
6207 * Remove all pools in the system.
6215 * Remove all cached state. All pools should be closed now,
6216 * so every spa in the AVL tree should be unreferenced.
6218 mutex_enter(&spa_namespace_lock
);
6219 while ((spa
= spa_next(NULL
)) != NULL
) {
6221 * Stop async tasks. The async thread may need to detach
6222 * a device that's been replaced, which requires grabbing
6223 * spa_namespace_lock, so we must drop it here.
6225 spa_open_ref(spa
, FTAG
);
6226 mutex_exit(&spa_namespace_lock
);
6227 spa_async_suspend(spa
);
6228 mutex_enter(&spa_namespace_lock
);
6229 spa_close(spa
, FTAG
);
6231 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
6233 spa_deactivate(spa
);
6237 mutex_exit(&spa_namespace_lock
);
6241 spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
, boolean_t aux
)
6246 if ((vd
= vdev_lookup_by_guid(spa
->spa_root_vdev
, guid
)) != NULL
)
6250 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
6251 vd
= spa
->spa_l2cache
.sav_vdevs
[i
];
6252 if (vd
->vdev_guid
== guid
)
6256 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
6257 vd
= spa
->spa_spares
.sav_vdevs
[i
];
6258 if (vd
->vdev_guid
== guid
)
6267 spa_upgrade(spa_t
*spa
, uint64_t version
)
6269 ASSERT(spa_writeable(spa
));
6271 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
6274 * This should only be called for a non-faulted pool, and since a
6275 * future version would result in an unopenable pool, this shouldn't be
6278 ASSERT(spa
->spa_uberblock
.ub_version
<= SPA_VERSION
);
6279 ASSERT(version
>= spa
->spa_uberblock
.ub_version
);
6281 spa
->spa_uberblock
.ub_version
= version
;
6282 vdev_config_dirty(spa
->spa_root_vdev
);
6284 spa_config_exit(spa
, SCL_ALL
, FTAG
);
6286 txg_wait_synced(spa_get_dsl(spa
), 0);
6290 spa_has_spare(spa_t
*spa
, uint64_t guid
)
6294 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
6296 for (i
= 0; i
< sav
->sav_count
; i
++)
6297 if (sav
->sav_vdevs
[i
]->vdev_guid
== guid
)
6300 for (i
= 0; i
< sav
->sav_npending
; i
++) {
6301 if (nvlist_lookup_uint64(sav
->sav_pending
[i
], ZPOOL_CONFIG_GUID
,
6302 &spareguid
) == 0 && spareguid
== guid
)
6310 * Check if a pool has an active shared spare device.
6311 * Note: reference count of an active spare is 2, as a spare and as a replace
6314 spa_has_active_shared_spare(spa_t
*spa
)
6318 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
6320 for (i
= 0; i
< sav
->sav_count
; i
++) {
6321 if (spa_spare_exists(sav
->sav_vdevs
[i
]->vdev_guid
, &pool
,
6322 &refcnt
) && pool
!= 0ULL && pool
== spa_guid(spa
) &&
6331 * Post a sysevent corresponding to the given event. The 'name' must be one of
6332 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
6333 * filled in from the spa and (optionally) the vdev. This doesn't do anything
6334 * in the userland libzpool, as we don't want consumers to misinterpret ztest
6335 * or zdb as real changes.
6338 spa_event_notify(spa_t
*spa
, vdev_t
*vd
, const char *name
)
6342 sysevent_attr_list_t
*attr
= NULL
;
6343 sysevent_value_t value
;
6346 ev
= sysevent_alloc(EC_ZFS
, (char *)name
, SUNW_KERN_PUB
"zfs",
6349 value
.value_type
= SE_DATA_TYPE_STRING
;
6350 value
.value
.sv_string
= spa_name(spa
);
6351 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_NAME
, &value
, SE_SLEEP
) != 0)
6354 value
.value_type
= SE_DATA_TYPE_UINT64
;
6355 value
.value
.sv_uint64
= spa_guid(spa
);
6356 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_GUID
, &value
, SE_SLEEP
) != 0)
6360 value
.value_type
= SE_DATA_TYPE_UINT64
;
6361 value
.value
.sv_uint64
= vd
->vdev_guid
;
6362 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_GUID
, &value
,
6366 if (vd
->vdev_path
) {
6367 value
.value_type
= SE_DATA_TYPE_STRING
;
6368 value
.value
.sv_string
= vd
->vdev_path
;
6369 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_PATH
,
6370 &value
, SE_SLEEP
) != 0)
6375 if (sysevent_attach_attributes(ev
, attr
) != 0)
6379 (void) log_sysevent(ev
, SE_SLEEP
, &eid
);
6383 sysevent_free_attr(attr
);