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.
27 * This file contains all the routines used when modifying on-disk SPA state.
28 * This includes opening, importing, destroying, exporting a pool, and syncing a
32 #include <sys/zfs_context.h>
33 #include <sys/fm/fs/zfs.h>
34 #include <sys/spa_impl.h>
36 #include <sys/zio_checksum.h>
38 #include <sys/dmu_tx.h>
42 #include <sys/vdev_impl.h>
43 #include <sys/metaslab.h>
44 #include <sys/metaslab_impl.h>
45 #include <sys/uberblock_impl.h>
48 #include <sys/dmu_traverse.h>
49 #include <sys/dmu_objset.h>
50 #include <sys/unique.h>
51 #include <sys/dsl_pool.h>
52 #include <sys/dsl_dataset.h>
53 #include <sys/dsl_dir.h>
54 #include <sys/dsl_prop.h>
55 #include <sys/dsl_synctask.h>
56 #include <sys/fs/zfs.h>
58 #include <sys/callb.h>
59 #include <sys/systeminfo.h>
60 #include <sys/spa_boot.h>
61 #include <sys/zfs_ioctl.h>
62 #include <sys/dsl_scan.h>
65 #include <sys/bootprops.h>
66 #include <sys/callb.h>
67 #include <sys/cpupart.h>
69 #include <sys/sysdc.h>
74 #include "zfs_comutil.h"
76 typedef enum zti_modes
{
77 zti_mode_fixed
, /* value is # of threads (min 1) */
78 zti_mode_online_percent
, /* value is % of online CPUs */
79 zti_mode_batch
, /* cpu-intensive; value is ignored */
80 zti_mode_null
, /* don't create a taskq */
84 #define ZTI_FIX(n) { zti_mode_fixed, (n) }
85 #define ZTI_PCT(n) { zti_mode_online_percent, (n) }
86 #define ZTI_BATCH { zti_mode_batch, 0 }
87 #define ZTI_NULL { zti_mode_null, 0 }
89 #define ZTI_ONE ZTI_FIX(1)
91 typedef struct zio_taskq_info
{
92 enum zti_modes zti_mode
;
96 static const char *const zio_taskq_types
[ZIO_TASKQ_TYPES
] = {
97 "issue", "issue_high", "intr", "intr_high"
101 * Define the taskq threads for the following I/O types:
102 * NULL, READ, WRITE, FREE, CLAIM, and IOCTL
104 const zio_taskq_info_t zio_taskqs
[ZIO_TYPES
][ZIO_TASKQ_TYPES
] = {
105 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */
106 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
107 { ZTI_FIX(8), ZTI_NULL
, ZTI_BATCH
, ZTI_NULL
},
108 { ZTI_BATCH
, ZTI_FIX(5), ZTI_FIX(8), ZTI_FIX(5) },
109 { ZTI_FIX(100), ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
110 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
111 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
114 static dsl_syncfunc_t spa_sync_props
;
115 static boolean_t
spa_has_active_shared_spare(spa_t
*spa
);
116 static int spa_load_impl(spa_t
*spa
, uint64_t, nvlist_t
*config
,
117 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
119 static void spa_vdev_resilver_done(spa_t
*spa
);
121 uint_t zio_taskq_batch_pct
= 100; /* 1 thread per cpu in pset */
122 id_t zio_taskq_psrset_bind
= PS_NONE
;
123 boolean_t zio_taskq_sysdc
= B_TRUE
; /* use SDC scheduling class */
124 uint_t zio_taskq_basedc
= 80; /* base duty cycle */
126 boolean_t spa_create_process
= B_TRUE
; /* no process ==> no sysdc */
129 * This (illegal) pool name is used when temporarily importing a spa_t in order
130 * to get the vdev stats associated with the imported devices.
132 #define TRYIMPORT_NAME "$import"
135 * ==========================================================================
136 * SPA properties routines
137 * ==========================================================================
141 * Add a (source=src, propname=propval) list to an nvlist.
144 spa_prop_add_list(nvlist_t
*nvl
, zpool_prop_t prop
, char *strval
,
145 uint64_t intval
, zprop_source_t src
)
147 const char *propname
= zpool_prop_to_name(prop
);
150 VERIFY(nvlist_alloc(&propval
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
151 VERIFY(nvlist_add_uint64(propval
, ZPROP_SOURCE
, src
) == 0);
154 VERIFY(nvlist_add_string(propval
, ZPROP_VALUE
, strval
) == 0);
156 VERIFY(nvlist_add_uint64(propval
, ZPROP_VALUE
, intval
) == 0);
158 VERIFY(nvlist_add_nvlist(nvl
, propname
, propval
) == 0);
159 nvlist_free(propval
);
163 * Get property values from the spa configuration.
166 spa_prop_get_config(spa_t
*spa
, nvlist_t
**nvp
)
170 uint64_t cap
, version
;
171 zprop_source_t src
= ZPROP_SRC_NONE
;
172 spa_config_dirent_t
*dp
;
174 ASSERT(MUTEX_HELD(&spa
->spa_props_lock
));
176 if (spa
->spa_root_vdev
!= NULL
) {
177 alloc
= metaslab_class_get_alloc(spa_normal_class(spa
));
178 size
= metaslab_class_get_space(spa_normal_class(spa
));
179 spa_prop_add_list(*nvp
, ZPOOL_PROP_NAME
, spa_name(spa
), 0, src
);
180 spa_prop_add_list(*nvp
, ZPOOL_PROP_SIZE
, NULL
, size
, src
);
181 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALLOCATED
, NULL
, alloc
, src
);
182 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREE
, NULL
,
184 spa_prop_add_list(*nvp
, ZPOOL_PROP_READONLY
, NULL
,
185 (spa_mode(spa
) == FREAD
), src
);
187 cap
= (size
== 0) ? 0 : (alloc
* 100 / size
);
188 spa_prop_add_list(*nvp
, ZPOOL_PROP_CAPACITY
, NULL
, cap
, src
);
190 spa_prop_add_list(*nvp
, ZPOOL_PROP_DEDUPRATIO
, NULL
,
191 ddt_get_pool_dedup_ratio(spa
), src
);
193 spa_prop_add_list(*nvp
, ZPOOL_PROP_HEALTH
, NULL
,
194 spa
->spa_root_vdev
->vdev_state
, src
);
196 version
= spa_version(spa
);
197 if (version
== zpool_prop_default_numeric(ZPOOL_PROP_VERSION
))
198 src
= ZPROP_SRC_DEFAULT
;
200 src
= ZPROP_SRC_LOCAL
;
201 spa_prop_add_list(*nvp
, ZPOOL_PROP_VERSION
, NULL
, version
, src
);
204 spa_prop_add_list(*nvp
, ZPOOL_PROP_GUID
, NULL
, spa_guid(spa
), src
);
206 if (spa
->spa_root
!= NULL
)
207 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALTROOT
, spa
->spa_root
,
210 if ((dp
= list_head(&spa
->spa_config_list
)) != NULL
) {
211 if (dp
->scd_path
== NULL
) {
212 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
213 "none", 0, ZPROP_SRC_LOCAL
);
214 } else if (strcmp(dp
->scd_path
, spa_config_path
) != 0) {
215 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
216 dp
->scd_path
, 0, ZPROP_SRC_LOCAL
);
222 * Get zpool property values.
225 spa_prop_get(spa_t
*spa
, nvlist_t
**nvp
)
227 objset_t
*mos
= spa
->spa_meta_objset
;
232 VERIFY(nvlist_alloc(nvp
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
234 mutex_enter(&spa
->spa_props_lock
);
237 * Get properties from the spa config.
239 spa_prop_get_config(spa
, nvp
);
241 /* If no pool property object, no more prop to get. */
242 if (mos
== NULL
|| spa
->spa_pool_props_object
== 0) {
243 mutex_exit(&spa
->spa_props_lock
);
248 * Get properties from the MOS pool property object.
250 for (zap_cursor_init(&zc
, mos
, spa
->spa_pool_props_object
);
251 (err
= zap_cursor_retrieve(&zc
, &za
)) == 0;
252 zap_cursor_advance(&zc
)) {
255 zprop_source_t src
= ZPROP_SRC_DEFAULT
;
258 if ((prop
= zpool_name_to_prop(za
.za_name
)) == ZPROP_INVAL
)
261 switch (za
.za_integer_length
) {
263 /* integer property */
264 if (za
.za_first_integer
!=
265 zpool_prop_default_numeric(prop
))
266 src
= ZPROP_SRC_LOCAL
;
268 if (prop
== ZPOOL_PROP_BOOTFS
) {
270 dsl_dataset_t
*ds
= NULL
;
272 dp
= spa_get_dsl(spa
);
273 rw_enter(&dp
->dp_config_rwlock
, RW_READER
);
274 if ((err
= dsl_dataset_hold_obj(dp
,
275 za
.za_first_integer
, FTAG
, &ds
))) {
276 rw_exit(&dp
->dp_config_rwlock
);
281 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1,
283 dsl_dataset_name(ds
, strval
);
284 dsl_dataset_rele(ds
, FTAG
);
285 rw_exit(&dp
->dp_config_rwlock
);
288 intval
= za
.za_first_integer
;
291 spa_prop_add_list(*nvp
, prop
, strval
, intval
, src
);
295 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1);
300 /* string property */
301 strval
= kmem_alloc(za
.za_num_integers
, KM_SLEEP
);
302 err
= zap_lookup(mos
, spa
->spa_pool_props_object
,
303 za
.za_name
, 1, za
.za_num_integers
, strval
);
305 kmem_free(strval
, za
.za_num_integers
);
308 spa_prop_add_list(*nvp
, prop
, strval
, 0, src
);
309 kmem_free(strval
, za
.za_num_integers
);
316 zap_cursor_fini(&zc
);
317 mutex_exit(&spa
->spa_props_lock
);
319 if (err
&& err
!= ENOENT
) {
329 * Validate the given pool properties nvlist and modify the list
330 * for the property values to be set.
333 spa_prop_validate(spa_t
*spa
, nvlist_t
*props
)
336 int error
= 0, reset_bootfs
= 0;
340 while ((elem
= nvlist_next_nvpair(props
, elem
)) != NULL
) {
342 char *propname
, *strval
;
347 propname
= nvpair_name(elem
);
349 if ((prop
= zpool_name_to_prop(propname
)) == ZPROP_INVAL
)
353 case ZPOOL_PROP_VERSION
:
354 error
= nvpair_value_uint64(elem
, &intval
);
356 (intval
< spa_version(spa
) || intval
> SPA_VERSION
))
360 case ZPOOL_PROP_DELEGATION
:
361 case ZPOOL_PROP_AUTOREPLACE
:
362 case ZPOOL_PROP_LISTSNAPS
:
363 case ZPOOL_PROP_AUTOEXPAND
:
364 error
= nvpair_value_uint64(elem
, &intval
);
365 if (!error
&& intval
> 1)
369 case ZPOOL_PROP_BOOTFS
:
371 * If the pool version is less than SPA_VERSION_BOOTFS,
372 * or the pool is still being created (version == 0),
373 * the bootfs property cannot be set.
375 if (spa_version(spa
) < SPA_VERSION_BOOTFS
) {
381 * Make sure the vdev config is bootable
383 if (!vdev_is_bootable(spa
->spa_root_vdev
)) {
390 error
= nvpair_value_string(elem
, &strval
);
395 if (strval
== NULL
|| strval
[0] == '\0') {
396 objnum
= zpool_prop_default_numeric(
401 if ((error
= dmu_objset_hold(strval
,FTAG
,&os
)))
404 /* Must be ZPL and not gzip compressed. */
406 if (dmu_objset_type(os
) != DMU_OST_ZFS
) {
408 } else if ((error
= dsl_prop_get_integer(strval
,
409 zfs_prop_to_name(ZFS_PROP_COMPRESSION
),
410 &compress
, NULL
)) == 0 &&
411 !BOOTFS_COMPRESS_VALID(compress
)) {
414 objnum
= dmu_objset_id(os
);
416 dmu_objset_rele(os
, FTAG
);
420 case ZPOOL_PROP_FAILUREMODE
:
421 error
= nvpair_value_uint64(elem
, &intval
);
422 if (!error
&& (intval
< ZIO_FAILURE_MODE_WAIT
||
423 intval
> ZIO_FAILURE_MODE_PANIC
))
427 * This is a special case which only occurs when
428 * the pool has completely failed. This allows
429 * the user to change the in-core failmode property
430 * without syncing it out to disk (I/Os might
431 * currently be blocked). We do this by returning
432 * EIO to the caller (spa_prop_set) to trick it
433 * into thinking we encountered a property validation
436 if (!error
&& spa_suspended(spa
)) {
437 spa
->spa_failmode
= intval
;
442 case ZPOOL_PROP_CACHEFILE
:
443 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
446 if (strval
[0] == '\0')
449 if (strcmp(strval
, "none") == 0)
452 if (strval
[0] != '/') {
457 slash
= strrchr(strval
, '/');
458 ASSERT(slash
!= NULL
);
460 if (slash
[1] == '\0' || strcmp(slash
, "/.") == 0 ||
461 strcmp(slash
, "/..") == 0)
465 case ZPOOL_PROP_DEDUPDITTO
:
466 if (spa_version(spa
) < SPA_VERSION_DEDUP
)
469 error
= nvpair_value_uint64(elem
, &intval
);
471 intval
!= 0 && intval
< ZIO_DEDUPDITTO_MIN
)
483 if (!error
&& reset_bootfs
) {
484 error
= nvlist_remove(props
,
485 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), DATA_TYPE_STRING
);
488 error
= nvlist_add_uint64(props
,
489 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), objnum
);
497 spa_configfile_set(spa_t
*spa
, nvlist_t
*nvp
, boolean_t need_sync
)
500 spa_config_dirent_t
*dp
;
502 if (nvlist_lookup_string(nvp
, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE
),
506 dp
= kmem_alloc(sizeof (spa_config_dirent_t
),
509 if (cachefile
[0] == '\0')
510 dp
->scd_path
= spa_strdup(spa_config_path
);
511 else if (strcmp(cachefile
, "none") == 0)
514 dp
->scd_path
= spa_strdup(cachefile
);
516 list_insert_head(&spa
->spa_config_list
, dp
);
518 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
522 spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
)
526 boolean_t need_sync
= B_FALSE
;
529 if ((error
= spa_prop_validate(spa
, nvp
)) != 0)
533 while ((elem
= nvlist_next_nvpair(nvp
, elem
)) != NULL
) {
534 if ((prop
= zpool_name_to_prop(
535 nvpair_name(elem
))) == ZPROP_INVAL
)
538 if (prop
== ZPOOL_PROP_CACHEFILE
||
539 prop
== ZPOOL_PROP_ALTROOT
||
540 prop
== ZPOOL_PROP_READONLY
)
548 return (dsl_sync_task_do(spa_get_dsl(spa
), NULL
, spa_sync_props
,
555 * If the bootfs property value is dsobj, clear it.
558 spa_prop_clear_bootfs(spa_t
*spa
, uint64_t dsobj
, dmu_tx_t
*tx
)
560 if (spa
->spa_bootfs
== dsobj
&& spa
->spa_pool_props_object
!= 0) {
561 VERIFY(zap_remove(spa
->spa_meta_objset
,
562 spa
->spa_pool_props_object
,
563 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), tx
) == 0);
569 * ==========================================================================
570 * SPA state manipulation (open/create/destroy/import/export)
571 * ==========================================================================
575 spa_error_entry_compare(const void *a
, const void *b
)
577 spa_error_entry_t
*sa
= (spa_error_entry_t
*)a
;
578 spa_error_entry_t
*sb
= (spa_error_entry_t
*)b
;
581 ret
= bcmp(&sa
->se_bookmark
, &sb
->se_bookmark
,
582 sizeof (zbookmark_t
));
593 * Utility function which retrieves copies of the current logs and
594 * re-initializes them in the process.
597 spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
)
599 ASSERT(MUTEX_HELD(&spa
->spa_errlist_lock
));
601 bcopy(&spa
->spa_errlist_last
, last
, sizeof (avl_tree_t
));
602 bcopy(&spa
->spa_errlist_scrub
, scrub
, sizeof (avl_tree_t
));
604 avl_create(&spa
->spa_errlist_scrub
,
605 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
606 offsetof(spa_error_entry_t
, se_avl
));
607 avl_create(&spa
->spa_errlist_last
,
608 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
609 offsetof(spa_error_entry_t
, se_avl
));
613 spa_taskq_create(spa_t
*spa
, const char *name
, enum zti_modes mode
,
616 uint_t flags
= TASKQ_PREPOPULATE
;
617 boolean_t batch
= B_FALSE
;
621 return (NULL
); /* no taskq needed */
624 ASSERT3U(value
, >=, 1);
625 value
= MAX(value
, 1);
630 flags
|= TASKQ_THREADS_CPU_PCT
;
631 value
= zio_taskq_batch_pct
;
634 case zti_mode_online_percent
:
635 flags
|= TASKQ_THREADS_CPU_PCT
;
639 panic("unrecognized mode for %s taskq (%u:%u) in "
645 if (zio_taskq_sysdc
&& spa
->spa_proc
!= &p0
) {
647 flags
|= TASKQ_DC_BATCH
;
649 return (taskq_create_sysdc(name
, value
, 50, INT_MAX
,
650 spa
->spa_proc
, zio_taskq_basedc
, flags
));
652 return (taskq_create_proc(name
, value
, maxclsyspri
, 50, INT_MAX
,
653 spa
->spa_proc
, flags
));
657 spa_create_zio_taskqs(spa_t
*spa
)
661 for (t
= 0; t
< ZIO_TYPES
; t
++) {
662 for (q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
663 const zio_taskq_info_t
*ztip
= &zio_taskqs
[t
][q
];
664 enum zti_modes mode
= ztip
->zti_mode
;
665 uint_t value
= ztip
->zti_value
;
668 (void) snprintf(name
, sizeof (name
),
669 "%s_%s", zio_type_name
[t
], zio_taskq_types
[q
]);
671 spa
->spa_zio_taskq
[t
][q
] =
672 spa_taskq_create(spa
, name
, mode
, value
);
679 spa_thread(void *arg
)
684 user_t
*pu
= PTOU(curproc
);
686 CALLB_CPR_INIT(&cprinfo
, &spa
->spa_proc_lock
, callb_generic_cpr
,
689 ASSERT(curproc
!= &p0
);
690 (void) snprintf(pu
->u_psargs
, sizeof (pu
->u_psargs
),
691 "zpool-%s", spa
->spa_name
);
692 (void) strlcpy(pu
->u_comm
, pu
->u_psargs
, sizeof (pu
->u_comm
));
694 /* bind this thread to the requested psrset */
695 if (zio_taskq_psrset_bind
!= PS_NONE
) {
697 mutex_enter(&cpu_lock
);
698 mutex_enter(&pidlock
);
699 mutex_enter(&curproc
->p_lock
);
701 if (cpupart_bind_thread(curthread
, zio_taskq_psrset_bind
,
702 0, NULL
, NULL
) == 0) {
703 curthread
->t_bind_pset
= zio_taskq_psrset_bind
;
706 "Couldn't bind process for zfs pool \"%s\" to "
707 "pset %d\n", spa
->spa_name
, zio_taskq_psrset_bind
);
710 mutex_exit(&curproc
->p_lock
);
711 mutex_exit(&pidlock
);
712 mutex_exit(&cpu_lock
);
716 if (zio_taskq_sysdc
) {
717 sysdc_thread_enter(curthread
, 100, 0);
720 spa
->spa_proc
= curproc
;
721 spa
->spa_did
= curthread
->t_did
;
723 spa_create_zio_taskqs(spa
);
725 mutex_enter(&spa
->spa_proc_lock
);
726 ASSERT(spa
->spa_proc_state
== SPA_PROC_CREATED
);
728 spa
->spa_proc_state
= SPA_PROC_ACTIVE
;
729 cv_broadcast(&spa
->spa_proc_cv
);
731 CALLB_CPR_SAFE_BEGIN(&cprinfo
);
732 while (spa
->spa_proc_state
== SPA_PROC_ACTIVE
)
733 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
734 CALLB_CPR_SAFE_END(&cprinfo
, &spa
->spa_proc_lock
);
736 ASSERT(spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
);
737 spa
->spa_proc_state
= SPA_PROC_GONE
;
739 cv_broadcast(&spa
->spa_proc_cv
);
740 CALLB_CPR_EXIT(&cprinfo
); /* drops spa_proc_lock */
742 mutex_enter(&curproc
->p_lock
);
748 * Activate an uninitialized pool.
751 spa_activate(spa_t
*spa
, int mode
)
753 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
755 spa
->spa_state
= POOL_STATE_ACTIVE
;
756 spa
->spa_mode
= mode
;
758 spa
->spa_normal_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
759 spa
->spa_log_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
761 /* Try to create a covering process */
762 mutex_enter(&spa
->spa_proc_lock
);
763 ASSERT(spa
->spa_proc_state
== SPA_PROC_NONE
);
764 ASSERT(spa
->spa_proc
== &p0
);
767 /* Only create a process if we're going to be around a while. */
768 if (spa_create_process
&& strcmp(spa
->spa_name
, TRYIMPORT_NAME
) != 0) {
769 if (newproc(spa_thread
, (caddr_t
)spa
, syscid
, maxclsyspri
,
771 spa
->spa_proc_state
= SPA_PROC_CREATED
;
772 while (spa
->spa_proc_state
== SPA_PROC_CREATED
) {
773 cv_wait(&spa
->spa_proc_cv
,
774 &spa
->spa_proc_lock
);
776 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
777 ASSERT(spa
->spa_proc
!= &p0
);
778 ASSERT(spa
->spa_did
!= 0);
782 "Couldn't create process for zfs pool \"%s\"\n",
787 mutex_exit(&spa
->spa_proc_lock
);
789 /* If we didn't create a process, we need to create our taskqs. */
790 if (spa
->spa_proc
== &p0
) {
791 spa_create_zio_taskqs(spa
);
794 list_create(&spa
->spa_config_dirty_list
, sizeof (vdev_t
),
795 offsetof(vdev_t
, vdev_config_dirty_node
));
796 list_create(&spa
->spa_state_dirty_list
, sizeof (vdev_t
),
797 offsetof(vdev_t
, vdev_state_dirty_node
));
799 txg_list_create(&spa
->spa_vdev_txg_list
,
800 offsetof(struct vdev
, vdev_txg_node
));
802 avl_create(&spa
->spa_errlist_scrub
,
803 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
804 offsetof(spa_error_entry_t
, se_avl
));
805 avl_create(&spa
->spa_errlist_last
,
806 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
807 offsetof(spa_error_entry_t
, se_avl
));
811 * Opposite of spa_activate().
814 spa_deactivate(spa_t
*spa
)
818 ASSERT(spa
->spa_sync_on
== B_FALSE
);
819 ASSERT(spa
->spa_dsl_pool
== NULL
);
820 ASSERT(spa
->spa_root_vdev
== NULL
);
821 ASSERT(spa
->spa_async_zio_root
== NULL
);
822 ASSERT(spa
->spa_state
!= POOL_STATE_UNINITIALIZED
);
824 txg_list_destroy(&spa
->spa_vdev_txg_list
);
826 list_destroy(&spa
->spa_config_dirty_list
);
827 list_destroy(&spa
->spa_state_dirty_list
);
829 for (t
= 0; t
< ZIO_TYPES
; t
++) {
830 for (q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
831 if (spa
->spa_zio_taskq
[t
][q
] != NULL
)
832 taskq_destroy(spa
->spa_zio_taskq
[t
][q
]);
833 spa
->spa_zio_taskq
[t
][q
] = NULL
;
837 metaslab_class_destroy(spa
->spa_normal_class
);
838 spa
->spa_normal_class
= NULL
;
840 metaslab_class_destroy(spa
->spa_log_class
);
841 spa
->spa_log_class
= NULL
;
844 * If this was part of an import or the open otherwise failed, we may
845 * still have errors left in the queues. Empty them just in case.
847 spa_errlog_drain(spa
);
849 avl_destroy(&spa
->spa_errlist_scrub
);
850 avl_destroy(&spa
->spa_errlist_last
);
852 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
854 mutex_enter(&spa
->spa_proc_lock
);
855 if (spa
->spa_proc_state
!= SPA_PROC_NONE
) {
856 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
857 spa
->spa_proc_state
= SPA_PROC_DEACTIVATE
;
858 cv_broadcast(&spa
->spa_proc_cv
);
859 while (spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
) {
860 ASSERT(spa
->spa_proc
!= &p0
);
861 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
863 ASSERT(spa
->spa_proc_state
== SPA_PROC_GONE
);
864 spa
->spa_proc_state
= SPA_PROC_NONE
;
866 ASSERT(spa
->spa_proc
== &p0
);
867 mutex_exit(&spa
->spa_proc_lock
);
870 * We want to make sure spa_thread() has actually exited the ZFS
871 * module, so that the module can't be unloaded out from underneath
874 if (spa
->spa_did
!= 0) {
875 thread_join(spa
->spa_did
);
881 * Verify a pool configuration, and construct the vdev tree appropriately. This
882 * will create all the necessary vdevs in the appropriate layout, with each vdev
883 * in the CLOSED state. This will prep the pool before open/creation/import.
884 * All vdev validation is done by the vdev_alloc() routine.
887 spa_config_parse(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
,
888 uint_t id
, int atype
)
895 if ((error
= vdev_alloc(spa
, vdp
, nv
, parent
, id
, atype
)) != 0)
898 if ((*vdp
)->vdev_ops
->vdev_op_leaf
)
901 error
= nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
913 for (c
= 0; c
< children
; c
++) {
915 if ((error
= spa_config_parse(spa
, &vd
, child
[c
], *vdp
, c
,
923 ASSERT(*vdp
!= NULL
);
929 * Opposite of spa_load().
932 spa_unload(spa_t
*spa
)
936 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
941 spa_async_suspend(spa
);
946 if (spa
->spa_sync_on
) {
947 txg_sync_stop(spa
->spa_dsl_pool
);
948 spa
->spa_sync_on
= B_FALSE
;
952 * Wait for any outstanding async I/O to complete.
954 if (spa
->spa_async_zio_root
!= NULL
) {
955 (void) zio_wait(spa
->spa_async_zio_root
);
956 spa
->spa_async_zio_root
= NULL
;
959 bpobj_close(&spa
->spa_deferred_bpobj
);
962 * Close the dsl pool.
964 if (spa
->spa_dsl_pool
) {
965 dsl_pool_close(spa
->spa_dsl_pool
);
966 spa
->spa_dsl_pool
= NULL
;
967 spa
->spa_meta_objset
= NULL
;
972 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
975 * Drop and purge level 2 cache
977 spa_l2cache_drop(spa
);
982 if (spa
->spa_root_vdev
)
983 vdev_free(spa
->spa_root_vdev
);
984 ASSERT(spa
->spa_root_vdev
== NULL
);
986 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
987 vdev_free(spa
->spa_spares
.sav_vdevs
[i
]);
988 if (spa
->spa_spares
.sav_vdevs
) {
989 kmem_free(spa
->spa_spares
.sav_vdevs
,
990 spa
->spa_spares
.sav_count
* sizeof (void *));
991 spa
->spa_spares
.sav_vdevs
= NULL
;
993 if (spa
->spa_spares
.sav_config
) {
994 nvlist_free(spa
->spa_spares
.sav_config
);
995 spa
->spa_spares
.sav_config
= NULL
;
997 spa
->spa_spares
.sav_count
= 0;
999 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
1000 vdev_free(spa
->spa_l2cache
.sav_vdevs
[i
]);
1001 if (spa
->spa_l2cache
.sav_vdevs
) {
1002 kmem_free(spa
->spa_l2cache
.sav_vdevs
,
1003 spa
->spa_l2cache
.sav_count
* sizeof (void *));
1004 spa
->spa_l2cache
.sav_vdevs
= NULL
;
1006 if (spa
->spa_l2cache
.sav_config
) {
1007 nvlist_free(spa
->spa_l2cache
.sav_config
);
1008 spa
->spa_l2cache
.sav_config
= NULL
;
1010 spa
->spa_l2cache
.sav_count
= 0;
1012 spa
->spa_async_suspended
= 0;
1014 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1018 * Load (or re-load) the current list of vdevs describing the active spares for
1019 * this pool. When this is called, we have some form of basic information in
1020 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1021 * then re-generate a more complete list including status information.
1024 spa_load_spares(spa_t
*spa
)
1031 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1034 * First, close and free any existing spare vdevs.
1036 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1037 vd
= spa
->spa_spares
.sav_vdevs
[i
];
1039 /* Undo the call to spa_activate() below */
1040 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1041 B_FALSE
)) != NULL
&& tvd
->vdev_isspare
)
1042 spa_spare_remove(tvd
);
1047 if (spa
->spa_spares
.sav_vdevs
)
1048 kmem_free(spa
->spa_spares
.sav_vdevs
,
1049 spa
->spa_spares
.sav_count
* sizeof (void *));
1051 if (spa
->spa_spares
.sav_config
== NULL
)
1054 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
1055 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
1057 spa
->spa_spares
.sav_count
= (int)nspares
;
1058 spa
->spa_spares
.sav_vdevs
= NULL
;
1064 * Construct the array of vdevs, opening them to get status in the
1065 * process. For each spare, there is potentially two different vdev_t
1066 * structures associated with it: one in the list of spares (used only
1067 * for basic validation purposes) and one in the active vdev
1068 * configuration (if it's spared in). During this phase we open and
1069 * validate each vdev on the spare list. If the vdev also exists in the
1070 * active configuration, then we also mark this vdev as an active spare.
1072 spa
->spa_spares
.sav_vdevs
= kmem_alloc(nspares
* sizeof (void *),
1074 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1075 VERIFY(spa_config_parse(spa
, &vd
, spares
[i
], NULL
, 0,
1076 VDEV_ALLOC_SPARE
) == 0);
1079 spa
->spa_spares
.sav_vdevs
[i
] = vd
;
1081 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1082 B_FALSE
)) != NULL
) {
1083 if (!tvd
->vdev_isspare
)
1087 * We only mark the spare active if we were successfully
1088 * able to load the vdev. Otherwise, importing a pool
1089 * with a bad active spare would result in strange
1090 * behavior, because multiple pool would think the spare
1091 * is actively in use.
1093 * There is a vulnerability here to an equally bizarre
1094 * circumstance, where a dead active spare is later
1095 * brought back to life (onlined or otherwise). Given
1096 * the rarity of this scenario, and the extra complexity
1097 * it adds, we ignore the possibility.
1099 if (!vdev_is_dead(tvd
))
1100 spa_spare_activate(tvd
);
1104 vd
->vdev_aux
= &spa
->spa_spares
;
1106 if (vdev_open(vd
) != 0)
1109 if (vdev_validate_aux(vd
) == 0)
1114 * Recompute the stashed list of spares, with status information
1117 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
, ZPOOL_CONFIG_SPARES
,
1118 DATA_TYPE_NVLIST_ARRAY
) == 0);
1120 spares
= kmem_alloc(spa
->spa_spares
.sav_count
* sizeof (void *),
1122 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1123 spares
[i
] = vdev_config_generate(spa
,
1124 spa
->spa_spares
.sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_SPARE
);
1125 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
1126 ZPOOL_CONFIG_SPARES
, spares
, spa
->spa_spares
.sav_count
) == 0);
1127 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1128 nvlist_free(spares
[i
]);
1129 kmem_free(spares
, spa
->spa_spares
.sav_count
* sizeof (void *));
1133 * Load (or re-load) the current list of vdevs describing the active l2cache for
1134 * this pool. When this is called, we have some form of basic information in
1135 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1136 * then re-generate a more complete list including status information.
1137 * Devices which are already active have their details maintained, and are
1141 spa_load_l2cache(spa_t
*spa
)
1145 int i
, j
, oldnvdevs
;
1147 vdev_t
*vd
, **oldvdevs
, **newvdevs
;
1148 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
1150 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1152 if (sav
->sav_config
!= NULL
) {
1153 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
1154 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
1155 newvdevs
= kmem_alloc(nl2cache
* sizeof (void *), KM_SLEEP
);
1160 oldvdevs
= sav
->sav_vdevs
;
1161 oldnvdevs
= sav
->sav_count
;
1162 sav
->sav_vdevs
= NULL
;
1166 * Process new nvlist of vdevs.
1168 for (i
= 0; i
< nl2cache
; i
++) {
1169 VERIFY(nvlist_lookup_uint64(l2cache
[i
], ZPOOL_CONFIG_GUID
,
1173 for (j
= 0; j
< oldnvdevs
; j
++) {
1175 if (vd
!= NULL
&& guid
== vd
->vdev_guid
) {
1177 * Retain previous vdev for add/remove ops.
1185 if (newvdevs
[i
] == NULL
) {
1189 VERIFY(spa_config_parse(spa
, &vd
, l2cache
[i
], NULL
, 0,
1190 VDEV_ALLOC_L2CACHE
) == 0);
1195 * Commit this vdev as an l2cache device,
1196 * even if it fails to open.
1198 spa_l2cache_add(vd
);
1203 spa_l2cache_activate(vd
);
1205 if (vdev_open(vd
) != 0)
1208 (void) vdev_validate_aux(vd
);
1210 if (!vdev_is_dead(vd
))
1211 l2arc_add_vdev(spa
, vd
);
1216 * Purge vdevs that were dropped
1218 for (i
= 0; i
< oldnvdevs
; i
++) {
1223 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
1224 pool
!= 0ULL && l2arc_vdev_present(vd
))
1225 l2arc_remove_vdev(vd
);
1226 (void) vdev_close(vd
);
1227 spa_l2cache_remove(vd
);
1232 kmem_free(oldvdevs
, oldnvdevs
* sizeof (void *));
1234 if (sav
->sav_config
== NULL
)
1237 sav
->sav_vdevs
= newvdevs
;
1238 sav
->sav_count
= (int)nl2cache
;
1241 * Recompute the stashed list of l2cache devices, with status
1242 * information this time.
1244 VERIFY(nvlist_remove(sav
->sav_config
, ZPOOL_CONFIG_L2CACHE
,
1245 DATA_TYPE_NVLIST_ARRAY
) == 0);
1247 l2cache
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
1248 for (i
= 0; i
< sav
->sav_count
; i
++)
1249 l2cache
[i
] = vdev_config_generate(spa
,
1250 sav
->sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_L2CACHE
);
1251 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
1252 ZPOOL_CONFIG_L2CACHE
, l2cache
, sav
->sav_count
) == 0);
1254 for (i
= 0; i
< sav
->sav_count
; i
++)
1255 nvlist_free(l2cache
[i
]);
1257 kmem_free(l2cache
, sav
->sav_count
* sizeof (void *));
1261 load_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
**value
)
1264 char *packed
= NULL
;
1269 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
1270 nvsize
= *(uint64_t *)db
->db_data
;
1271 dmu_buf_rele(db
, FTAG
);
1273 packed
= kmem_alloc(nvsize
, KM_SLEEP
);
1274 error
= dmu_read(spa
->spa_meta_objset
, obj
, 0, nvsize
, packed
,
1277 error
= nvlist_unpack(packed
, nvsize
, value
, 0);
1278 kmem_free(packed
, nvsize
);
1284 * Checks to see if the given vdev could not be opened, in which case we post a
1285 * sysevent to notify the autoreplace code that the device has been removed.
1288 spa_check_removed(vdev_t
*vd
)
1292 for (c
= 0; c
< vd
->vdev_children
; c
++)
1293 spa_check_removed(vd
->vdev_child
[c
]);
1295 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_is_dead(vd
)) {
1296 zfs_post_autoreplace(vd
->vdev_spa
, vd
);
1297 spa_event_notify(vd
->vdev_spa
, vd
, ESC_ZFS_VDEV_CHECK
);
1302 * Validate the current config against the MOS config
1305 spa_config_valid(spa_t
*spa
, nvlist_t
*config
)
1307 vdev_t
*mrvd
, *rvd
= spa
->spa_root_vdev
;
1311 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nv
) == 0);
1313 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1314 VERIFY(spa_config_parse(spa
, &mrvd
, nv
, NULL
, 0, VDEV_ALLOC_LOAD
) == 0);
1316 ASSERT3U(rvd
->vdev_children
, ==, mrvd
->vdev_children
);
1319 * If we're doing a normal import, then build up any additional
1320 * diagnostic information about missing devices in this config.
1321 * We'll pass this up to the user for further processing.
1323 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
)) {
1324 nvlist_t
**child
, *nv
;
1327 child
= kmem_alloc(rvd
->vdev_children
* sizeof (nvlist_t
**),
1329 VERIFY(nvlist_alloc(&nv
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
1331 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1332 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1333 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1335 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1336 mtvd
->vdev_ops
!= &vdev_missing_ops
&&
1338 child
[idx
++] = vdev_config_generate(spa
, mtvd
,
1343 VERIFY(nvlist_add_nvlist_array(nv
,
1344 ZPOOL_CONFIG_CHILDREN
, child
, idx
) == 0);
1345 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
1346 ZPOOL_CONFIG_MISSING_DEVICES
, nv
) == 0);
1348 for (i
= 0; i
< idx
; i
++)
1349 nvlist_free(child
[i
]);
1352 kmem_free(child
, rvd
->vdev_children
* sizeof (char **));
1356 * Compare the root vdev tree with the information we have
1357 * from the MOS config (mrvd). Check each top-level vdev
1358 * with the corresponding MOS config top-level (mtvd).
1360 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1361 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1362 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1365 * Resolve any "missing" vdevs in the current configuration.
1366 * If we find that the MOS config has more accurate information
1367 * about the top-level vdev then use that vdev instead.
1369 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1370 mtvd
->vdev_ops
!= &vdev_missing_ops
) {
1372 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
))
1376 * Device specific actions.
1378 if (mtvd
->vdev_islog
) {
1379 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
1382 * XXX - once we have 'readonly' pool
1383 * support we should be able to handle
1384 * missing data devices by transitioning
1385 * the pool to readonly.
1391 * Swap the missing vdev with the data we were
1392 * able to obtain from the MOS config.
1394 vdev_remove_child(rvd
, tvd
);
1395 vdev_remove_child(mrvd
, mtvd
);
1397 vdev_add_child(rvd
, mtvd
);
1398 vdev_add_child(mrvd
, tvd
);
1400 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1402 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1405 } else if (mtvd
->vdev_islog
) {
1407 * Load the slog device's state from the MOS config
1408 * since it's possible that the label does not
1409 * contain the most up-to-date information.
1411 vdev_load_log_state(tvd
, mtvd
);
1416 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1419 * Ensure we were able to validate the config.
1421 return (rvd
->vdev_guid_sum
== spa
->spa_uberblock
.ub_guid_sum
);
1425 * Check for missing log devices
1428 spa_check_logs(spa_t
*spa
)
1430 switch (spa
->spa_log_state
) {
1433 case SPA_LOG_MISSING
:
1434 /* need to recheck in case slog has been restored */
1435 case SPA_LOG_UNKNOWN
:
1436 if (dmu_objset_find(spa
->spa_name
, zil_check_log_chain
, NULL
,
1437 DS_FIND_CHILDREN
)) {
1438 spa_set_log_state(spa
, SPA_LOG_MISSING
);
1447 spa_passivate_log(spa_t
*spa
)
1449 vdev_t
*rvd
= spa
->spa_root_vdev
;
1450 boolean_t slog_found
= B_FALSE
;
1453 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1455 if (!spa_has_slogs(spa
))
1458 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1459 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1460 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1462 if (tvd
->vdev_islog
) {
1463 metaslab_group_passivate(mg
);
1464 slog_found
= B_TRUE
;
1468 return (slog_found
);
1472 spa_activate_log(spa_t
*spa
)
1474 vdev_t
*rvd
= spa
->spa_root_vdev
;
1477 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1479 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
1480 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1481 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1483 if (tvd
->vdev_islog
)
1484 metaslab_group_activate(mg
);
1489 spa_offline_log(spa_t
*spa
)
1493 if ((error
= dmu_objset_find(spa_name(spa
), zil_vdev_offline
,
1494 NULL
, DS_FIND_CHILDREN
)) == 0) {
1497 * We successfully offlined the log device, sync out the
1498 * current txg so that the "stubby" block can be removed
1501 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1507 spa_aux_check_removed(spa_aux_vdev_t
*sav
)
1511 for (i
= 0; i
< sav
->sav_count
; i
++)
1512 spa_check_removed(sav
->sav_vdevs
[i
]);
1516 spa_claim_notify(zio_t
*zio
)
1518 spa_t
*spa
= zio
->io_spa
;
1523 mutex_enter(&spa
->spa_props_lock
); /* any mutex will do */
1524 if (spa
->spa_claim_max_txg
< zio
->io_bp
->blk_birth
)
1525 spa
->spa_claim_max_txg
= zio
->io_bp
->blk_birth
;
1526 mutex_exit(&spa
->spa_props_lock
);
1529 typedef struct spa_load_error
{
1530 uint64_t sle_meta_count
;
1531 uint64_t sle_data_count
;
1535 spa_load_verify_done(zio_t
*zio
)
1537 blkptr_t
*bp
= zio
->io_bp
;
1538 spa_load_error_t
*sle
= zio
->io_private
;
1539 dmu_object_type_t type
= BP_GET_TYPE(bp
);
1540 int error
= zio
->io_error
;
1543 if ((BP_GET_LEVEL(bp
) != 0 || dmu_ot
[type
].ot_metadata
) &&
1544 type
!= DMU_OT_INTENT_LOG
)
1545 atomic_add_64(&sle
->sle_meta_count
, 1);
1547 atomic_add_64(&sle
->sle_data_count
, 1);
1549 zio_data_buf_free(zio
->io_data
, zio
->io_size
);
1554 spa_load_verify_cb(spa_t
*spa
, zilog_t
*zilog
, const blkptr_t
*bp
,
1555 arc_buf_t
*pbuf
, const zbookmark_t
*zb
, const dnode_phys_t
*dnp
, void *arg
)
1559 size_t size
= BP_GET_PSIZE(bp
);
1560 void *data
= zio_data_buf_alloc(size
);
1562 zio_nowait(zio_read(rio
, spa
, bp
, data
, size
,
1563 spa_load_verify_done
, rio
->io_private
, ZIO_PRIORITY_SCRUB
,
1564 ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_CANFAIL
|
1565 ZIO_FLAG_SCRUB
| ZIO_FLAG_RAW
, zb
));
1571 spa_load_verify(spa_t
*spa
)
1574 spa_load_error_t sle
= { 0 };
1575 zpool_rewind_policy_t policy
;
1576 boolean_t verify_ok
= B_FALSE
;
1579 zpool_get_rewind_policy(spa
->spa_config
, &policy
);
1581 if (policy
.zrp_request
& ZPOOL_NEVER_REWIND
)
1584 rio
= zio_root(spa
, NULL
, &sle
,
1585 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
);
1587 error
= traverse_pool(spa
, spa
->spa_verify_min_txg
,
1588 TRAVERSE_PRE
| TRAVERSE_PREFETCH
, spa_load_verify_cb
, rio
);
1590 (void) zio_wait(rio
);
1592 spa
->spa_load_meta_errors
= sle
.sle_meta_count
;
1593 spa
->spa_load_data_errors
= sle
.sle_data_count
;
1595 if (!error
&& sle
.sle_meta_count
<= policy
.zrp_maxmeta
&&
1596 sle
.sle_data_count
<= policy
.zrp_maxdata
) {
1600 spa
->spa_load_txg
= spa
->spa_uberblock
.ub_txg
;
1601 spa
->spa_load_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
1603 loss
= spa
->spa_last_ubsync_txg_ts
- spa
->spa_load_txg_ts
;
1604 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1605 ZPOOL_CONFIG_LOAD_TIME
, spa
->spa_load_txg_ts
) == 0);
1606 VERIFY(nvlist_add_int64(spa
->spa_load_info
,
1607 ZPOOL_CONFIG_REWIND_TIME
, loss
) == 0);
1608 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1609 ZPOOL_CONFIG_LOAD_DATA_ERRORS
, sle
.sle_data_count
) == 0);
1611 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
;
1615 if (error
!= ENXIO
&& error
!= EIO
)
1620 return (verify_ok
? 0 : EIO
);
1624 * Find a value in the pool props object.
1627 spa_prop_find(spa_t
*spa
, zpool_prop_t prop
, uint64_t *val
)
1629 (void) zap_lookup(spa
->spa_meta_objset
, spa
->spa_pool_props_object
,
1630 zpool_prop_to_name(prop
), sizeof (uint64_t), 1, val
);
1634 * Find a value in the pool directory object.
1637 spa_dir_prop(spa_t
*spa
, const char *name
, uint64_t *val
)
1639 return (zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
1640 name
, sizeof (uint64_t), 1, val
));
1644 spa_vdev_err(vdev_t
*vdev
, vdev_aux_t aux
, int err
)
1646 vdev_set_state(vdev
, B_TRUE
, VDEV_STATE_CANT_OPEN
, aux
);
1651 * Fix up config after a partly-completed split. This is done with the
1652 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
1653 * pool have that entry in their config, but only the splitting one contains
1654 * a list of all the guids of the vdevs that are being split off.
1656 * This function determines what to do with that list: either rejoin
1657 * all the disks to the pool, or complete the splitting process. To attempt
1658 * the rejoin, each disk that is offlined is marked online again, and
1659 * we do a reopen() call. If the vdev label for every disk that was
1660 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
1661 * then we call vdev_split() on each disk, and complete the split.
1663 * Otherwise we leave the config alone, with all the vdevs in place in
1664 * the original pool.
1667 spa_try_repair(spa_t
*spa
, nvlist_t
*config
)
1674 boolean_t attempt_reopen
;
1676 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
, &nvl
) != 0)
1679 /* check that the config is complete */
1680 if (nvlist_lookup_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
1681 &glist
, &gcount
) != 0)
1684 vd
= kmem_zalloc(gcount
* sizeof (vdev_t
*), KM_SLEEP
);
1686 /* attempt to online all the vdevs & validate */
1687 attempt_reopen
= B_TRUE
;
1688 for (i
= 0; i
< gcount
; i
++) {
1689 if (glist
[i
] == 0) /* vdev is hole */
1692 vd
[i
] = spa_lookup_by_guid(spa
, glist
[i
], B_FALSE
);
1693 if (vd
[i
] == NULL
) {
1695 * Don't bother attempting to reopen the disks;
1696 * just do the split.
1698 attempt_reopen
= B_FALSE
;
1700 /* attempt to re-online it */
1701 vd
[i
]->vdev_offline
= B_FALSE
;
1705 if (attempt_reopen
) {
1706 vdev_reopen(spa
->spa_root_vdev
);
1708 /* check each device to see what state it's in */
1709 for (extracted
= 0, i
= 0; i
< gcount
; i
++) {
1710 if (vd
[i
] != NULL
&&
1711 vd
[i
]->vdev_stat
.vs_aux
!= VDEV_AUX_SPLIT_POOL
)
1718 * If every disk has been moved to the new pool, or if we never
1719 * even attempted to look at them, then we split them off for
1722 if (!attempt_reopen
|| gcount
== extracted
) {
1723 for (i
= 0; i
< gcount
; i
++)
1726 vdev_reopen(spa
->spa_root_vdev
);
1729 kmem_free(vd
, gcount
* sizeof (vdev_t
*));
1733 spa_load(spa_t
*spa
, spa_load_state_t state
, spa_import_type_t type
,
1734 boolean_t mosconfig
)
1736 nvlist_t
*config
= spa
->spa_config
;
1737 char *ereport
= FM_EREPORT_ZFS_POOL
;
1742 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
, &pool_guid
))
1746 * Versioning wasn't explicitly added to the label until later, so if
1747 * it's not present treat it as the initial version.
1749 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VERSION
,
1750 &spa
->spa_ubsync
.ub_version
) != 0)
1751 spa
->spa_ubsync
.ub_version
= SPA_VERSION_INITIAL
;
1753 (void) nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
1754 &spa
->spa_config_txg
);
1756 if ((state
== SPA_LOAD_IMPORT
|| state
== SPA_LOAD_TRYIMPORT
) &&
1757 spa_guid_exists(pool_guid
, 0)) {
1760 spa
->spa_load_guid
= pool_guid
;
1762 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
,
1764 VERIFY(nvlist_dup(nvl
, &spa
->spa_config_splitting
,
1768 gethrestime(&spa
->spa_loaded_ts
);
1769 error
= spa_load_impl(spa
, pool_guid
, config
, state
, type
,
1770 mosconfig
, &ereport
);
1773 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
1775 if (error
!= EEXIST
) {
1776 spa
->spa_loaded_ts
.tv_sec
= 0;
1777 spa
->spa_loaded_ts
.tv_nsec
= 0;
1779 if (error
!= EBADF
) {
1780 zfs_ereport_post(ereport
, spa
, NULL
, NULL
, 0, 0);
1783 spa
->spa_load_state
= error
? SPA_LOAD_ERROR
: SPA_LOAD_NONE
;
1790 * Load an existing storage pool, using the pool's builtin spa_config as a
1791 * source of configuration information.
1794 spa_load_impl(spa_t
*spa
, uint64_t pool_guid
, nvlist_t
*config
,
1795 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
1799 nvlist_t
*nvroot
= NULL
;
1801 uberblock_t
*ub
= &spa
->spa_uberblock
;
1802 uint64_t children
, config_cache_txg
= spa
->spa_config_txg
;
1803 int orig_mode
= spa
->spa_mode
;
1808 * If this is an untrusted config, access the pool in read-only mode.
1809 * This prevents things like resilvering recently removed devices.
1812 spa
->spa_mode
= FREAD
;
1814 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1816 spa
->spa_load_state
= state
;
1818 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvroot
))
1821 parse
= (type
== SPA_IMPORT_EXISTING
?
1822 VDEV_ALLOC_LOAD
: VDEV_ALLOC_SPLIT
);
1825 * Create "The Godfather" zio to hold all async IOs
1827 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
1828 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
1831 * Parse the configuration into a vdev tree. We explicitly set the
1832 * value that will be returned by spa_version() since parsing the
1833 * configuration requires knowing the version number.
1835 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1836 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, parse
);
1837 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1842 ASSERT(spa
->spa_root_vdev
== rvd
);
1844 if (type
!= SPA_IMPORT_ASSEMBLE
) {
1845 ASSERT(spa_guid(spa
) == pool_guid
);
1849 * Try to open all vdevs, loading each label in the process.
1851 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1852 error
= vdev_open(rvd
);
1853 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1858 * We need to validate the vdev labels against the configuration that
1859 * we have in hand, which is dependent on the setting of mosconfig. If
1860 * mosconfig is true then we're validating the vdev labels based on
1861 * that config. Otherwise, we're validating against the cached config
1862 * (zpool.cache) that was read when we loaded the zfs module, and then
1863 * later we will recursively call spa_load() and validate against
1866 * If we're assembling a new pool that's been split off from an
1867 * existing pool, the labels haven't yet been updated so we skip
1868 * validation for now.
1870 if (type
!= SPA_IMPORT_ASSEMBLE
) {
1871 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1872 error
= vdev_validate(rvd
);
1873 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1878 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
1883 * Find the best uberblock.
1885 vdev_uberblock_load(NULL
, rvd
, ub
);
1888 * If we weren't able to find a single valid uberblock, return failure.
1890 if (ub
->ub_txg
== 0)
1891 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, ENXIO
));
1894 * If the pool is newer than the code, we can't open it.
1896 if (ub
->ub_version
> SPA_VERSION
)
1897 return (spa_vdev_err(rvd
, VDEV_AUX_VERSION_NEWER
, ENOTSUP
));
1900 * If the vdev guid sum doesn't match the uberblock, we have an
1901 * incomplete configuration. We first check to see if the pool
1902 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
1903 * If it is, defer the vdev_guid_sum check till later so we
1904 * can handle missing vdevs.
1906 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VDEV_CHILDREN
,
1907 &children
) != 0 && mosconfig
&& type
!= SPA_IMPORT_ASSEMBLE
&&
1908 rvd
->vdev_guid_sum
!= ub
->ub_guid_sum
)
1909 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
, ENXIO
));
1911 if (type
!= SPA_IMPORT_ASSEMBLE
&& spa
->spa_config_splitting
) {
1912 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1913 spa_try_repair(spa
, config
);
1914 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1915 nvlist_free(spa
->spa_config_splitting
);
1916 spa
->spa_config_splitting
= NULL
;
1920 * Initialize internal SPA structures.
1922 spa
->spa_state
= POOL_STATE_ACTIVE
;
1923 spa
->spa_ubsync
= spa
->spa_uberblock
;
1924 spa
->spa_verify_min_txg
= spa
->spa_extreme_rewind
?
1925 TXG_INITIAL
- 1 : spa_last_synced_txg(spa
) - TXG_DEFER_SIZE
- 1;
1926 spa
->spa_first_txg
= spa
->spa_last_ubsync_txg
?
1927 spa
->spa_last_ubsync_txg
: spa_last_synced_txg(spa
) + 1;
1928 spa
->spa_claim_max_txg
= spa
->spa_first_txg
;
1929 spa
->spa_prev_software_version
= ub
->ub_software_version
;
1931 error
= dsl_pool_open(spa
, spa
->spa_first_txg
, &spa
->spa_dsl_pool
);
1933 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1934 spa
->spa_meta_objset
= spa
->spa_dsl_pool
->dp_meta_objset
;
1936 if (spa_dir_prop(spa
, DMU_POOL_CONFIG
, &spa
->spa_config_object
) != 0)
1937 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1941 nvlist_t
*policy
= NULL
, *nvconfig
;
1943 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
1944 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1946 if (!spa_is_root(spa
) && nvlist_lookup_uint64(nvconfig
,
1947 ZPOOL_CONFIG_HOSTID
, &hostid
) == 0) {
1949 unsigned long myhostid
= 0;
1951 VERIFY(nvlist_lookup_string(nvconfig
,
1952 ZPOOL_CONFIG_HOSTNAME
, &hostname
) == 0);
1955 myhostid
= zone_get_hostid(NULL
);
1958 * We're emulating the system's hostid in userland, so
1959 * we can't use zone_get_hostid().
1961 (void) ddi_strtoul(hw_serial
, NULL
, 10, &myhostid
);
1962 #endif /* _KERNEL */
1963 if (hostid
!= 0 && myhostid
!= 0 &&
1964 hostid
!= myhostid
) {
1965 nvlist_free(nvconfig
);
1966 cmn_err(CE_WARN
, "pool '%s' could not be "
1967 "loaded as it was last accessed by "
1968 "another system (host: %s hostid: 0x%lx). "
1969 "See: http://www.sun.com/msg/ZFS-8000-EY",
1970 spa_name(spa
), hostname
,
1971 (unsigned long)hostid
);
1975 if (nvlist_lookup_nvlist(spa
->spa_config
,
1976 ZPOOL_REWIND_POLICY
, &policy
) == 0)
1977 VERIFY(nvlist_add_nvlist(nvconfig
,
1978 ZPOOL_REWIND_POLICY
, policy
) == 0);
1980 spa_config_set(spa
, nvconfig
);
1982 spa_deactivate(spa
);
1983 spa_activate(spa
, orig_mode
);
1985 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, B_TRUE
));
1988 if (spa_dir_prop(spa
, DMU_POOL_SYNC_BPOBJ
, &obj
) != 0)
1989 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1990 error
= bpobj_open(&spa
->spa_deferred_bpobj
, spa
->spa_meta_objset
, obj
);
1992 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1995 * Load the bit that tells us to use the new accounting function
1996 * (raid-z deflation). If we have an older pool, this will not
1999 error
= spa_dir_prop(spa
, DMU_POOL_DEFLATE
, &spa
->spa_deflate
);
2000 if (error
!= 0 && error
!= ENOENT
)
2001 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2003 error
= spa_dir_prop(spa
, DMU_POOL_CREATION_VERSION
,
2004 &spa
->spa_creation_version
);
2005 if (error
!= 0 && error
!= ENOENT
)
2006 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2009 * Load the persistent error log. If we have an older pool, this will
2012 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_LAST
, &spa
->spa_errlog_last
);
2013 if (error
!= 0 && error
!= ENOENT
)
2014 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2016 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_SCRUB
,
2017 &spa
->spa_errlog_scrub
);
2018 if (error
!= 0 && error
!= ENOENT
)
2019 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2022 * Load the history object. If we have an older pool, this
2023 * will not be present.
2025 error
= spa_dir_prop(spa
, DMU_POOL_HISTORY
, &spa
->spa_history
);
2026 if (error
!= 0 && error
!= ENOENT
)
2027 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2030 * If we're assembling the pool from the split-off vdevs of
2031 * an existing pool, we don't want to attach the spares & cache
2036 * Load any hot spares for this pool.
2038 error
= spa_dir_prop(spa
, DMU_POOL_SPARES
, &spa
->spa_spares
.sav_object
);
2039 if (error
!= 0 && error
!= ENOENT
)
2040 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2041 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2042 ASSERT(spa_version(spa
) >= SPA_VERSION_SPARES
);
2043 if (load_nvlist(spa
, spa
->spa_spares
.sav_object
,
2044 &spa
->spa_spares
.sav_config
) != 0)
2045 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2047 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2048 spa_load_spares(spa
);
2049 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2050 } else if (error
== 0) {
2051 spa
->spa_spares
.sav_sync
= B_TRUE
;
2055 * Load any level 2 ARC devices for this pool.
2057 error
= spa_dir_prop(spa
, DMU_POOL_L2CACHE
,
2058 &spa
->spa_l2cache
.sav_object
);
2059 if (error
!= 0 && error
!= ENOENT
)
2060 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2061 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2062 ASSERT(spa_version(spa
) >= SPA_VERSION_L2CACHE
);
2063 if (load_nvlist(spa
, spa
->spa_l2cache
.sav_object
,
2064 &spa
->spa_l2cache
.sav_config
) != 0)
2065 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2067 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2068 spa_load_l2cache(spa
);
2069 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2070 } else if (error
== 0) {
2071 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
2074 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
2076 error
= spa_dir_prop(spa
, DMU_POOL_PROPS
, &spa
->spa_pool_props_object
);
2077 if (error
&& error
!= ENOENT
)
2078 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2081 uint64_t autoreplace
;
2083 spa_prop_find(spa
, ZPOOL_PROP_BOOTFS
, &spa
->spa_bootfs
);
2084 spa_prop_find(spa
, ZPOOL_PROP_AUTOREPLACE
, &autoreplace
);
2085 spa_prop_find(spa
, ZPOOL_PROP_DELEGATION
, &spa
->spa_delegation
);
2086 spa_prop_find(spa
, ZPOOL_PROP_FAILUREMODE
, &spa
->spa_failmode
);
2087 spa_prop_find(spa
, ZPOOL_PROP_AUTOEXPAND
, &spa
->spa_autoexpand
);
2088 spa_prop_find(spa
, ZPOOL_PROP_DEDUPDITTO
,
2089 &spa
->spa_dedup_ditto
);
2091 spa
->spa_autoreplace
= (autoreplace
!= 0);
2095 * If the 'autoreplace' property is set, then post a resource notifying
2096 * the ZFS DE that it should not issue any faults for unopenable
2097 * devices. We also iterate over the vdevs, and post a sysevent for any
2098 * unopenable vdevs so that the normal autoreplace handler can take
2101 if (spa
->spa_autoreplace
&& state
!= SPA_LOAD_TRYIMPORT
) {
2102 spa_check_removed(spa
->spa_root_vdev
);
2104 * For the import case, this is done in spa_import(), because
2105 * at this point we're using the spare definitions from
2106 * the MOS config, not necessarily from the userland config.
2108 if (state
!= SPA_LOAD_IMPORT
) {
2109 spa_aux_check_removed(&spa
->spa_spares
);
2110 spa_aux_check_removed(&spa
->spa_l2cache
);
2115 * Load the vdev state for all toplevel vdevs.
2120 * Propagate the leaf DTLs we just loaded all the way up the tree.
2122 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2123 vdev_dtl_reassess(rvd
, 0, 0, B_FALSE
);
2124 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2127 * Load the DDTs (dedup tables).
2129 error
= ddt_load(spa
);
2131 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2133 spa_update_dspace(spa
);
2136 * Validate the config, using the MOS config to fill in any
2137 * information which might be missing. If we fail to validate
2138 * the config then declare the pool unfit for use. If we're
2139 * assembling a pool from a split, the log is not transferred
2142 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2145 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2146 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2148 if (!spa_config_valid(spa
, nvconfig
)) {
2149 nvlist_free(nvconfig
);
2150 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
,
2153 nvlist_free(nvconfig
);
2156 * Now that we've validate the config, check the state of the
2157 * root vdev. If it can't be opened, it indicates one or
2158 * more toplevel vdevs are faulted.
2160 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2163 if (spa_check_logs(spa
)) {
2164 *ereport
= FM_EREPORT_ZFS_LOG_REPLAY
;
2165 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_LOG
, ENXIO
));
2170 * We've successfully opened the pool, verify that we're ready
2171 * to start pushing transactions.
2173 if (state
!= SPA_LOAD_TRYIMPORT
) {
2174 if ((error
= spa_load_verify(spa
)))
2175 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2179 if (spa_writeable(spa
) && (state
== SPA_LOAD_RECOVER
||
2180 spa
->spa_load_max_txg
== UINT64_MAX
)) {
2182 int need_update
= B_FALSE
;
2185 ASSERT(state
!= SPA_LOAD_TRYIMPORT
);
2188 * Claim log blocks that haven't been committed yet.
2189 * This must all happen in a single txg.
2190 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2191 * invoked from zil_claim_log_block()'s i/o done callback.
2192 * Price of rollback is that we abandon the log.
2194 spa
->spa_claiming
= B_TRUE
;
2196 tx
= dmu_tx_create_assigned(spa_get_dsl(spa
),
2197 spa_first_txg(spa
));
2198 (void) dmu_objset_find(spa_name(spa
),
2199 zil_claim
, tx
, DS_FIND_CHILDREN
);
2202 spa
->spa_claiming
= B_FALSE
;
2204 spa_set_log_state(spa
, SPA_LOG_GOOD
);
2205 spa
->spa_sync_on
= B_TRUE
;
2206 txg_sync_start(spa
->spa_dsl_pool
);
2209 * Wait for all claims to sync. We sync up to the highest
2210 * claimed log block birth time so that claimed log blocks
2211 * don't appear to be from the future. spa_claim_max_txg
2212 * will have been set for us by either zil_check_log_chain()
2213 * (invoked from spa_check_logs()) or zil_claim() above.
2215 txg_wait_synced(spa
->spa_dsl_pool
, spa
->spa_claim_max_txg
);
2218 * If the config cache is stale, or we have uninitialized
2219 * metaslabs (see spa_vdev_add()), then update the config.
2221 * If this is a verbatim import, trust the current
2222 * in-core spa_config and update the disk labels.
2224 if (config_cache_txg
!= spa
->spa_config_txg
||
2225 state
== SPA_LOAD_IMPORT
||
2226 state
== SPA_LOAD_RECOVER
||
2227 (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
))
2228 need_update
= B_TRUE
;
2230 for (c
= 0; c
< rvd
->vdev_children
; c
++)
2231 if (rvd
->vdev_child
[c
]->vdev_ms_array
== 0)
2232 need_update
= B_TRUE
;
2235 * Update the config cache asychronously in case we're the
2236 * root pool, in which case the config cache isn't writable yet.
2239 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
2242 * Check all DTLs to see if anything needs resilvering.
2244 if (!dsl_scan_resilvering(spa
->spa_dsl_pool
) &&
2245 vdev_resilver_needed(rvd
, NULL
, NULL
))
2246 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
2249 * Delete any inconsistent datasets.
2251 (void) dmu_objset_find(spa_name(spa
),
2252 dsl_destroy_inconsistent
, NULL
, DS_FIND_CHILDREN
);
2255 * Clean up any stale temporary dataset userrefs.
2257 dsl_pool_clean_tmp_userrefs(spa
->spa_dsl_pool
);
2264 spa_load_retry(spa_t
*spa
, spa_load_state_t state
, int mosconfig
)
2266 int mode
= spa
->spa_mode
;
2269 spa_deactivate(spa
);
2271 spa
->spa_load_max_txg
--;
2273 spa_activate(spa
, mode
);
2274 spa_async_suspend(spa
);
2276 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, mosconfig
));
2280 spa_load_best(spa_t
*spa
, spa_load_state_t state
, int mosconfig
,
2281 uint64_t max_request
, int rewind_flags
)
2283 nvlist_t
*config
= NULL
;
2284 int load_error
, rewind_error
;
2285 uint64_t safe_rewind_txg
;
2288 if (spa
->spa_load_txg
&& state
== SPA_LOAD_RECOVER
) {
2289 spa
->spa_load_max_txg
= spa
->spa_load_txg
;
2290 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2292 spa
->spa_load_max_txg
= max_request
;
2295 load_error
= rewind_error
= spa_load(spa
, state
, SPA_IMPORT_EXISTING
,
2297 if (load_error
== 0)
2300 if (spa
->spa_root_vdev
!= NULL
)
2301 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2303 spa
->spa_last_ubsync_txg
= spa
->spa_uberblock
.ub_txg
;
2304 spa
->spa_last_ubsync_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
2306 if (rewind_flags
& ZPOOL_NEVER_REWIND
) {
2307 nvlist_free(config
);
2308 return (load_error
);
2311 /* Price of rolling back is discarding txgs, including log */
2312 if (state
== SPA_LOAD_RECOVER
)
2313 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2315 spa
->spa_load_max_txg
= spa
->spa_last_ubsync_txg
;
2316 safe_rewind_txg
= spa
->spa_last_ubsync_txg
- TXG_DEFER_SIZE
;
2317 min_txg
= (rewind_flags
& ZPOOL_EXTREME_REWIND
) ?
2318 TXG_INITIAL
: safe_rewind_txg
;
2321 * Continue as long as we're finding errors, we're still within
2322 * the acceptable rewind range, and we're still finding uberblocks
2324 while (rewind_error
&& spa
->spa_uberblock
.ub_txg
>= min_txg
&&
2325 spa
->spa_uberblock
.ub_txg
<= spa
->spa_load_max_txg
) {
2326 if (spa
->spa_load_max_txg
< safe_rewind_txg
)
2327 spa
->spa_extreme_rewind
= B_TRUE
;
2328 rewind_error
= spa_load_retry(spa
, state
, mosconfig
);
2331 spa
->spa_extreme_rewind
= B_FALSE
;
2332 spa
->spa_load_max_txg
= UINT64_MAX
;
2334 if (config
&& (rewind_error
|| state
!= SPA_LOAD_RECOVER
))
2335 spa_config_set(spa
, config
);
2337 return (state
== SPA_LOAD_RECOVER
? rewind_error
: load_error
);
2343 * The import case is identical to an open except that the configuration is sent
2344 * down from userland, instead of grabbed from the configuration cache. For the
2345 * case of an open, the pool configuration will exist in the
2346 * POOL_STATE_UNINITIALIZED state.
2348 * The stats information (gen/count/ustats) is used to gather vdev statistics at
2349 * the same time open the pool, without having to keep around the spa_t in some
2353 spa_open_common(const char *pool
, spa_t
**spapp
, void *tag
, nvlist_t
*nvpolicy
,
2357 spa_load_state_t state
= SPA_LOAD_OPEN
;
2359 int locked
= B_FALSE
;
2364 * As disgusting as this is, we need to support recursive calls to this
2365 * function because dsl_dir_open() is called during spa_load(), and ends
2366 * up calling spa_open() again. The real fix is to figure out how to
2367 * avoid dsl_dir_open() calling this in the first place.
2369 if (mutex_owner(&spa_namespace_lock
) != curthread
) {
2370 mutex_enter(&spa_namespace_lock
);
2374 if ((spa
= spa_lookup(pool
)) == NULL
) {
2376 mutex_exit(&spa_namespace_lock
);
2380 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
) {
2381 zpool_rewind_policy_t policy
;
2383 zpool_get_rewind_policy(nvpolicy
? nvpolicy
: spa
->spa_config
,
2385 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
2386 state
= SPA_LOAD_RECOVER
;
2388 spa_activate(spa
, spa_mode_global
);
2390 if (state
!= SPA_LOAD_RECOVER
)
2391 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
2393 error
= spa_load_best(spa
, state
, B_FALSE
, policy
.zrp_txg
,
2394 policy
.zrp_request
);
2396 if (error
== EBADF
) {
2398 * If vdev_validate() returns failure (indicated by
2399 * EBADF), it indicates that one of the vdevs indicates
2400 * that the pool has been exported or destroyed. If
2401 * this is the case, the config cache is out of sync and
2402 * we should remove the pool from the namespace.
2405 spa_deactivate(spa
);
2406 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
2409 mutex_exit(&spa_namespace_lock
);
2415 * We can't open the pool, but we still have useful
2416 * information: the state of each vdev after the
2417 * attempted vdev_open(). Return this to the user.
2419 if (config
!= NULL
&& spa
->spa_config
) {
2420 VERIFY(nvlist_dup(spa
->spa_config
, config
,
2422 VERIFY(nvlist_add_nvlist(*config
,
2423 ZPOOL_CONFIG_LOAD_INFO
,
2424 spa
->spa_load_info
) == 0);
2427 spa_deactivate(spa
);
2428 spa
->spa_last_open_failed
= error
;
2430 mutex_exit(&spa_namespace_lock
);
2436 spa_open_ref(spa
, tag
);
2439 *config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2442 * If we've recovered the pool, pass back any information we
2443 * gathered while doing the load.
2445 if (state
== SPA_LOAD_RECOVER
) {
2446 VERIFY(nvlist_add_nvlist(*config
, ZPOOL_CONFIG_LOAD_INFO
,
2447 spa
->spa_load_info
) == 0);
2451 spa
->spa_last_open_failed
= 0;
2452 spa
->spa_last_ubsync_txg
= 0;
2453 spa
->spa_load_txg
= 0;
2454 mutex_exit(&spa_namespace_lock
);
2463 spa_open_rewind(const char *name
, spa_t
**spapp
, void *tag
, nvlist_t
*policy
,
2466 return (spa_open_common(name
, spapp
, tag
, policy
, config
));
2470 spa_open(const char *name
, spa_t
**spapp
, void *tag
)
2472 return (spa_open_common(name
, spapp
, tag
, NULL
, NULL
));
2476 * Lookup the given spa_t, incrementing the inject count in the process,
2477 * preventing it from being exported or destroyed.
2480 spa_inject_addref(char *name
)
2484 mutex_enter(&spa_namespace_lock
);
2485 if ((spa
= spa_lookup(name
)) == NULL
) {
2486 mutex_exit(&spa_namespace_lock
);
2489 spa
->spa_inject_ref
++;
2490 mutex_exit(&spa_namespace_lock
);
2496 spa_inject_delref(spa_t
*spa
)
2498 mutex_enter(&spa_namespace_lock
);
2499 spa
->spa_inject_ref
--;
2500 mutex_exit(&spa_namespace_lock
);
2504 * Add spares device information to the nvlist.
2507 spa_add_spares(spa_t
*spa
, nvlist_t
*config
)
2517 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2519 if (spa
->spa_spares
.sav_count
== 0)
2522 VERIFY(nvlist_lookup_nvlist(config
,
2523 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2524 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
2525 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2527 VERIFY(nvlist_add_nvlist_array(nvroot
,
2528 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
2529 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2530 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2533 * Go through and find any spares which have since been
2534 * repurposed as an active spare. If this is the case, update
2535 * their status appropriately.
2537 for (i
= 0; i
< nspares
; i
++) {
2538 VERIFY(nvlist_lookup_uint64(spares
[i
],
2539 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2540 if (spa_spare_exists(guid
, &pool
, NULL
) &&
2542 VERIFY(nvlist_lookup_uint64_array(
2543 spares
[i
], ZPOOL_CONFIG_VDEV_STATS
,
2544 (uint64_t **)&vs
, &vsc
) == 0);
2545 vs
->vs_state
= VDEV_STATE_CANT_OPEN
;
2546 vs
->vs_aux
= VDEV_AUX_SPARED
;
2553 * Add l2cache device information to the nvlist, including vdev stats.
2556 spa_add_l2cache(spa_t
*spa
, nvlist_t
*config
)
2559 uint_t i
, j
, nl2cache
;
2566 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2568 if (spa
->spa_l2cache
.sav_count
== 0)
2571 VERIFY(nvlist_lookup_nvlist(config
,
2572 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2573 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
2574 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2575 if (nl2cache
!= 0) {
2576 VERIFY(nvlist_add_nvlist_array(nvroot
,
2577 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
2578 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2579 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2582 * Update level 2 cache device stats.
2585 for (i
= 0; i
< nl2cache
; i
++) {
2586 VERIFY(nvlist_lookup_uint64(l2cache
[i
],
2587 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2590 for (j
= 0; j
< spa
->spa_l2cache
.sav_count
; j
++) {
2592 spa
->spa_l2cache
.sav_vdevs
[j
]->vdev_guid
) {
2593 vd
= spa
->spa_l2cache
.sav_vdevs
[j
];
2599 VERIFY(nvlist_lookup_uint64_array(l2cache
[i
],
2600 ZPOOL_CONFIG_VDEV_STATS
, (uint64_t **)&vs
, &vsc
)
2602 vdev_get_stats(vd
, vs
);
2608 spa_get_stats(const char *name
, nvlist_t
**config
, char *altroot
, size_t buflen
)
2614 error
= spa_open_common(name
, &spa
, FTAG
, NULL
, config
);
2618 * This still leaves a window of inconsistency where the spares
2619 * or l2cache devices could change and the config would be
2620 * self-inconsistent.
2622 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
2624 if (*config
!= NULL
) {
2625 uint64_t loadtimes
[2];
2627 loadtimes
[0] = spa
->spa_loaded_ts
.tv_sec
;
2628 loadtimes
[1] = spa
->spa_loaded_ts
.tv_nsec
;
2629 VERIFY(nvlist_add_uint64_array(*config
,
2630 ZPOOL_CONFIG_LOADED_TIME
, loadtimes
, 2) == 0);
2632 VERIFY(nvlist_add_uint64(*config
,
2633 ZPOOL_CONFIG_ERRCOUNT
,
2634 spa_get_errlog_size(spa
)) == 0);
2636 if (spa_suspended(spa
))
2637 VERIFY(nvlist_add_uint64(*config
,
2638 ZPOOL_CONFIG_SUSPENDED
,
2639 spa
->spa_failmode
) == 0);
2641 spa_add_spares(spa
, *config
);
2642 spa_add_l2cache(spa
, *config
);
2647 * We want to get the alternate root even for faulted pools, so we cheat
2648 * and call spa_lookup() directly.
2652 mutex_enter(&spa_namespace_lock
);
2653 spa
= spa_lookup(name
);
2655 spa_altroot(spa
, altroot
, buflen
);
2659 mutex_exit(&spa_namespace_lock
);
2661 spa_altroot(spa
, altroot
, buflen
);
2666 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
2667 spa_close(spa
, FTAG
);
2674 * Validate that the auxiliary device array is well formed. We must have an
2675 * array of nvlists, each which describes a valid leaf vdev. If this is an
2676 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
2677 * specified, as long as they are well-formed.
2680 spa_validate_aux_devs(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
,
2681 spa_aux_vdev_t
*sav
, const char *config
, uint64_t version
,
2682 vdev_labeltype_t label
)
2689 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
2692 * It's acceptable to have no devs specified.
2694 if (nvlist_lookup_nvlist_array(nvroot
, config
, &dev
, &ndev
) != 0)
2701 * Make sure the pool is formatted with a version that supports this
2704 if (spa_version(spa
) < version
)
2708 * Set the pending device list so we correctly handle device in-use
2711 sav
->sav_pending
= dev
;
2712 sav
->sav_npending
= ndev
;
2714 for (i
= 0; i
< ndev
; i
++) {
2715 if ((error
= spa_config_parse(spa
, &vd
, dev
[i
], NULL
, 0,
2719 if (!vd
->vdev_ops
->vdev_op_leaf
) {
2726 * The L2ARC currently only supports disk devices in
2727 * kernel context. For user-level testing, we allow it.
2730 if ((strcmp(config
, ZPOOL_CONFIG_L2CACHE
) == 0) &&
2731 strcmp(vd
->vdev_ops
->vdev_op_type
, VDEV_TYPE_DISK
) != 0) {
2738 if ((error
= vdev_open(vd
)) == 0 &&
2739 (error
= vdev_label_init(vd
, crtxg
, label
)) == 0) {
2740 VERIFY(nvlist_add_uint64(dev
[i
], ZPOOL_CONFIG_GUID
,
2741 vd
->vdev_guid
) == 0);
2747 (mode
!= VDEV_ALLOC_SPARE
&& mode
!= VDEV_ALLOC_L2CACHE
))
2754 sav
->sav_pending
= NULL
;
2755 sav
->sav_npending
= 0;
2760 spa_validate_aux(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
)
2764 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
2766 if ((error
= spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
2767 &spa
->spa_spares
, ZPOOL_CONFIG_SPARES
, SPA_VERSION_SPARES
,
2768 VDEV_LABEL_SPARE
)) != 0) {
2772 return (spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
2773 &spa
->spa_l2cache
, ZPOOL_CONFIG_L2CACHE
, SPA_VERSION_L2CACHE
,
2774 VDEV_LABEL_L2CACHE
));
2778 spa_set_aux_vdevs(spa_aux_vdev_t
*sav
, nvlist_t
**devs
, int ndevs
,
2783 if (sav
->sav_config
!= NULL
) {
2789 * Generate new dev list by concatentating with the
2792 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
, config
,
2793 &olddevs
, &oldndevs
) == 0);
2795 newdevs
= kmem_alloc(sizeof (void *) *
2796 (ndevs
+ oldndevs
), KM_SLEEP
);
2797 for (i
= 0; i
< oldndevs
; i
++)
2798 VERIFY(nvlist_dup(olddevs
[i
], &newdevs
[i
],
2800 for (i
= 0; i
< ndevs
; i
++)
2801 VERIFY(nvlist_dup(devs
[i
], &newdevs
[i
+ oldndevs
],
2804 VERIFY(nvlist_remove(sav
->sav_config
, config
,
2805 DATA_TYPE_NVLIST_ARRAY
) == 0);
2807 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
2808 config
, newdevs
, ndevs
+ oldndevs
) == 0);
2809 for (i
= 0; i
< oldndevs
+ ndevs
; i
++)
2810 nvlist_free(newdevs
[i
]);
2811 kmem_free(newdevs
, (oldndevs
+ ndevs
) * sizeof (void *));
2814 * Generate a new dev list.
2816 VERIFY(nvlist_alloc(&sav
->sav_config
, NV_UNIQUE_NAME
,
2818 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
, config
,
2824 * Stop and drop level 2 ARC devices
2827 spa_l2cache_drop(spa_t
*spa
)
2831 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
2833 for (i
= 0; i
< sav
->sav_count
; i
++) {
2836 vd
= sav
->sav_vdevs
[i
];
2839 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
2840 pool
!= 0ULL && l2arc_vdev_present(vd
))
2841 l2arc_remove_vdev(vd
);
2842 if (vd
->vdev_isl2cache
)
2843 spa_l2cache_remove(vd
);
2844 vdev_clear_stats(vd
);
2845 (void) vdev_close(vd
);
2853 spa_create(const char *pool
, nvlist_t
*nvroot
, nvlist_t
*props
,
2854 const char *history_str
, nvlist_t
*zplprops
)
2857 char *altroot
= NULL
;
2862 uint64_t txg
= TXG_INITIAL
;
2863 nvlist_t
**spares
, **l2cache
;
2864 uint_t nspares
, nl2cache
;
2865 uint64_t version
, obj
;
2869 * If this pool already exists, return failure.
2871 mutex_enter(&spa_namespace_lock
);
2872 if (spa_lookup(pool
) != NULL
) {
2873 mutex_exit(&spa_namespace_lock
);
2878 * Allocate a new spa_t structure.
2880 (void) nvlist_lookup_string(props
,
2881 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
2882 spa
= spa_add(pool
, NULL
, altroot
);
2883 spa_activate(spa
, spa_mode_global
);
2885 if (props
&& (error
= spa_prop_validate(spa
, props
))) {
2886 spa_deactivate(spa
);
2888 mutex_exit(&spa_namespace_lock
);
2892 if (nvlist_lookup_uint64(props
, zpool_prop_to_name(ZPOOL_PROP_VERSION
),
2894 version
= SPA_VERSION
;
2895 ASSERT(version
<= SPA_VERSION
);
2897 spa
->spa_first_txg
= txg
;
2898 spa
->spa_uberblock
.ub_txg
= txg
- 1;
2899 spa
->spa_uberblock
.ub_version
= version
;
2900 spa
->spa_ubsync
= spa
->spa_uberblock
;
2903 * Create "The Godfather" zio to hold all async IOs
2905 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
2906 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
2909 * Create the root vdev.
2911 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2913 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, VDEV_ALLOC_ADD
);
2915 ASSERT(error
!= 0 || rvd
!= NULL
);
2916 ASSERT(error
!= 0 || spa
->spa_root_vdev
== rvd
);
2918 if (error
== 0 && !zfs_allocatable_devs(nvroot
))
2922 (error
= vdev_create(rvd
, txg
, B_FALSE
)) == 0 &&
2923 (error
= spa_validate_aux(spa
, nvroot
, txg
,
2924 VDEV_ALLOC_ADD
)) == 0) {
2925 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
2926 vdev_metaslab_set_size(rvd
->vdev_child
[c
]);
2927 vdev_expand(rvd
->vdev_child
[c
], txg
);
2931 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2935 spa_deactivate(spa
);
2937 mutex_exit(&spa_namespace_lock
);
2942 * Get the list of spares, if specified.
2944 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
2945 &spares
, &nspares
) == 0) {
2946 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
, NV_UNIQUE_NAME
,
2948 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
2949 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
2950 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2951 spa_load_spares(spa
);
2952 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2953 spa
->spa_spares
.sav_sync
= B_TRUE
;
2957 * Get the list of level 2 cache devices, if specified.
2959 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
2960 &l2cache
, &nl2cache
) == 0) {
2961 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
2962 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
2963 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
2964 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
2965 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2966 spa_load_l2cache(spa
);
2967 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2968 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
2971 spa
->spa_dsl_pool
= dp
= dsl_pool_create(spa
, zplprops
, txg
);
2972 spa
->spa_meta_objset
= dp
->dp_meta_objset
;
2975 * Create DDTs (dedup tables).
2979 spa_update_dspace(spa
);
2981 tx
= dmu_tx_create_assigned(dp
, txg
);
2984 * Create the pool config object.
2986 spa
->spa_config_object
= dmu_object_alloc(spa
->spa_meta_objset
,
2987 DMU_OT_PACKED_NVLIST
, SPA_CONFIG_BLOCKSIZE
,
2988 DMU_OT_PACKED_NVLIST_SIZE
, sizeof (uint64_t), tx
);
2990 if (zap_add(spa
->spa_meta_objset
,
2991 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CONFIG
,
2992 sizeof (uint64_t), 1, &spa
->spa_config_object
, tx
) != 0) {
2993 cmn_err(CE_PANIC
, "failed to add pool config");
2996 if (zap_add(spa
->spa_meta_objset
,
2997 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CREATION_VERSION
,
2998 sizeof (uint64_t), 1, &version
, tx
) != 0) {
2999 cmn_err(CE_PANIC
, "failed to add pool version");
3002 /* Newly created pools with the right version are always deflated. */
3003 if (version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
3004 spa
->spa_deflate
= TRUE
;
3005 if (zap_add(spa
->spa_meta_objset
,
3006 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
3007 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
) != 0) {
3008 cmn_err(CE_PANIC
, "failed to add deflate");
3013 * Create the deferred-free bpobj. Turn off compression
3014 * because sync-to-convergence takes longer if the blocksize
3017 obj
= bpobj_alloc(spa
->spa_meta_objset
, 1 << 14, tx
);
3018 dmu_object_set_compress(spa
->spa_meta_objset
, obj
,
3019 ZIO_COMPRESS_OFF
, tx
);
3020 if (zap_add(spa
->spa_meta_objset
,
3021 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_SYNC_BPOBJ
,
3022 sizeof (uint64_t), 1, &obj
, tx
) != 0) {
3023 cmn_err(CE_PANIC
, "failed to add bpobj");
3025 VERIFY3U(0, ==, bpobj_open(&spa
->spa_deferred_bpobj
,
3026 spa
->spa_meta_objset
, obj
));
3029 * Create the pool's history object.
3031 if (version
>= SPA_VERSION_ZPOOL_HISTORY
)
3032 spa_history_create_obj(spa
, tx
);
3035 * Set pool properties.
3037 spa
->spa_bootfs
= zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS
);
3038 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
3039 spa
->spa_failmode
= zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE
);
3040 spa
->spa_autoexpand
= zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND
);
3042 if (props
!= NULL
) {
3043 spa_configfile_set(spa
, props
, B_FALSE
);
3044 spa_sync_props(spa
, props
, tx
);
3049 spa
->spa_sync_on
= B_TRUE
;
3050 txg_sync_start(spa
->spa_dsl_pool
);
3053 * We explicitly wait for the first transaction to complete so that our
3054 * bean counters are appropriately updated.
3056 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
3058 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3060 if (version
>= SPA_VERSION_ZPOOL_HISTORY
&& history_str
!= NULL
)
3061 (void) spa_history_log(spa
, history_str
, LOG_CMD_POOL_CREATE
);
3062 spa_history_log_version(spa
, LOG_POOL_CREATE
);
3064 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
3066 mutex_exit(&spa_namespace_lock
);
3073 * Get the root pool information from the root disk, then import the root pool
3074 * during the system boot up time.
3076 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t
**);
3079 spa_generate_rootconf(char *devpath
, char *devid
, uint64_t *guid
)
3082 nvlist_t
*nvtop
, *nvroot
;
3085 if (vdev_disk_read_rootlabel(devpath
, devid
, &config
) != 0)
3089 * Add this top-level vdev to the child array.
3091 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3093 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
3095 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_GUID
, guid
) == 0);
3098 * Put this pool's top-level vdevs into a root vdev.
3100 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3101 VERIFY(nvlist_add_string(nvroot
, ZPOOL_CONFIG_TYPE
,
3102 VDEV_TYPE_ROOT
) == 0);
3103 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_ID
, 0ULL) == 0);
3104 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_GUID
, pgid
) == 0);
3105 VERIFY(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
3109 * Replace the existing vdev_tree with the new root vdev in
3110 * this pool's configuration (remove the old, add the new).
3112 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, nvroot
) == 0);
3113 nvlist_free(nvroot
);
3118 * Walk the vdev tree and see if we can find a device with "better"
3119 * configuration. A configuration is "better" if the label on that
3120 * device has a more recent txg.
3123 spa_alt_rootvdev(vdev_t
*vd
, vdev_t
**avd
, uint64_t *txg
)
3127 for (c
= 0; c
< vd
->vdev_children
; c
++)
3128 spa_alt_rootvdev(vd
->vdev_child
[c
], avd
, txg
);
3130 if (vd
->vdev_ops
->vdev_op_leaf
) {
3134 if (vdev_disk_read_rootlabel(vd
->vdev_physpath
, vd
->vdev_devid
,
3138 VERIFY(nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_TXG
,
3142 * Do we have a better boot device?
3144 if (label_txg
> *txg
) {
3153 * Import a root pool.
3155 * For x86. devpath_list will consist of devid and/or physpath name of
3156 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3157 * The GRUB "findroot" command will return the vdev we should boot.
3159 * For Sparc, devpath_list consists the physpath name of the booting device
3160 * no matter the rootpool is a single device pool or a mirrored pool.
3162 * "/pci@1f,0/ide@d/disk@0,0:a"
3165 spa_import_rootpool(char *devpath
, char *devid
)
3168 vdev_t
*rvd
, *bvd
, *avd
= NULL
;
3169 nvlist_t
*config
, *nvtop
;
3175 * Read the label from the boot device and generate a configuration.
3177 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3178 #if defined(_OBP) && defined(_KERNEL)
3179 if (config
== NULL
) {
3180 if (strstr(devpath
, "/iscsi/ssd") != NULL
) {
3182 get_iscsi_bootpath_phy(devpath
);
3183 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3187 if (config
== NULL
) {
3188 cmn_err(CE_NOTE
, "Can not read the pool label from '%s'",
3193 VERIFY(nvlist_lookup_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3195 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
, &txg
) == 0);
3197 mutex_enter(&spa_namespace_lock
);
3198 if ((spa
= spa_lookup(pname
)) != NULL
) {
3200 * Remove the existing root pool from the namespace so that we
3201 * can replace it with the correct config we just read in.
3206 spa
= spa_add(pname
, config
, NULL
);
3207 spa
->spa_is_root
= B_TRUE
;
3208 spa
->spa_import_flags
= ZFS_IMPORT_VERBATIM
;
3211 * Build up a vdev tree based on the boot device's label config.
3213 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3215 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3216 error
= spa_config_parse(spa
, &rvd
, nvtop
, NULL
, 0,
3217 VDEV_ALLOC_ROOTPOOL
);
3218 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3220 mutex_exit(&spa_namespace_lock
);
3221 nvlist_free(config
);
3222 cmn_err(CE_NOTE
, "Can not parse the config for pool '%s'",
3228 * Get the boot vdev.
3230 if ((bvd
= vdev_lookup_by_guid(rvd
, guid
)) == NULL
) {
3231 cmn_err(CE_NOTE
, "Can not find the boot vdev for guid %llu",
3232 (u_longlong_t
)guid
);
3238 * Determine if there is a better boot device.
3241 spa_alt_rootvdev(rvd
, &avd
, &txg
);
3243 cmn_err(CE_NOTE
, "The boot device is 'degraded'. Please "
3244 "try booting from '%s'", avd
->vdev_path
);
3250 * If the boot device is part of a spare vdev then ensure that
3251 * we're booting off the active spare.
3253 if (bvd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
3254 !bvd
->vdev_isspare
) {
3255 cmn_err(CE_NOTE
, "The boot device is currently spared. Please "
3256 "try booting from '%s'",
3258 vdev_child
[bvd
->vdev_parent
->vdev_children
- 1]->vdev_path
);
3264 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3266 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3268 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3269 mutex_exit(&spa_namespace_lock
);
3271 nvlist_free(config
);
3278 * Import a non-root pool into the system.
3281 spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
, uint64_t flags
)
3284 char *altroot
= NULL
;
3285 spa_load_state_t state
= SPA_LOAD_IMPORT
;
3286 zpool_rewind_policy_t policy
;
3287 uint64_t mode
= spa_mode_global
;
3288 uint64_t readonly
= B_FALSE
;
3291 nvlist_t
**spares
, **l2cache
;
3292 uint_t nspares
, nl2cache
;
3295 * If a pool with this name exists, return failure.
3297 mutex_enter(&spa_namespace_lock
);
3298 if (spa_lookup(pool
) != NULL
) {
3299 mutex_exit(&spa_namespace_lock
);
3304 * Create and initialize the spa structure.
3306 (void) nvlist_lookup_string(props
,
3307 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3308 (void) nvlist_lookup_uint64(props
,
3309 zpool_prop_to_name(ZPOOL_PROP_READONLY
), &readonly
);
3312 spa
= spa_add(pool
, config
, altroot
);
3313 spa
->spa_import_flags
= flags
;
3316 * Verbatim import - Take a pool and insert it into the namespace
3317 * as if it had been loaded at boot.
3319 if (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) {
3321 spa_configfile_set(spa
, props
, B_FALSE
);
3323 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3325 mutex_exit(&spa_namespace_lock
);
3326 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3331 spa_activate(spa
, mode
);
3334 * Don't start async tasks until we know everything is healthy.
3336 spa_async_suspend(spa
);
3338 zpool_get_rewind_policy(config
, &policy
);
3339 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
3340 state
= SPA_LOAD_RECOVER
;
3343 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
3344 * because the user-supplied config is actually the one to trust when
3347 if (state
!= SPA_LOAD_RECOVER
)
3348 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
3350 error
= spa_load_best(spa
, state
, B_TRUE
, policy
.zrp_txg
,
3351 policy
.zrp_request
);
3354 * Propagate anything learned while loading the pool and pass it
3355 * back to caller (i.e. rewind info, missing devices, etc).
3357 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
3358 spa
->spa_load_info
) == 0);
3360 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3362 * Toss any existing sparelist, as it doesn't have any validity
3363 * anymore, and conflicts with spa_has_spare().
3365 if (spa
->spa_spares
.sav_config
) {
3366 nvlist_free(spa
->spa_spares
.sav_config
);
3367 spa
->spa_spares
.sav_config
= NULL
;
3368 spa_load_spares(spa
);
3370 if (spa
->spa_l2cache
.sav_config
) {
3371 nvlist_free(spa
->spa_l2cache
.sav_config
);
3372 spa
->spa_l2cache
.sav_config
= NULL
;
3373 spa_load_l2cache(spa
);
3376 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3379 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3382 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3383 VDEV_ALLOC_L2CACHE
);
3384 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3387 spa_configfile_set(spa
, props
, B_FALSE
);
3389 if (error
!= 0 || (props
&& spa_writeable(spa
) &&
3390 (error
= spa_prop_set(spa
, props
)))) {
3392 spa_deactivate(spa
);
3394 mutex_exit(&spa_namespace_lock
);
3398 spa_async_resume(spa
);
3401 * Override any spares and level 2 cache devices as specified by
3402 * the user, as these may have correct device names/devids, etc.
3404 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3405 &spares
, &nspares
) == 0) {
3406 if (spa
->spa_spares
.sav_config
)
3407 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
,
3408 ZPOOL_CONFIG_SPARES
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3410 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
,
3411 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3412 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3413 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3414 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3415 spa_load_spares(spa
);
3416 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3417 spa
->spa_spares
.sav_sync
= B_TRUE
;
3419 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3420 &l2cache
, &nl2cache
) == 0) {
3421 if (spa
->spa_l2cache
.sav_config
)
3422 VERIFY(nvlist_remove(spa
->spa_l2cache
.sav_config
,
3423 ZPOOL_CONFIG_L2CACHE
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3425 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3426 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3427 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3428 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3429 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3430 spa_load_l2cache(spa
);
3431 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3432 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3436 * Check for any removed devices.
3438 if (spa
->spa_autoreplace
) {
3439 spa_aux_check_removed(&spa
->spa_spares
);
3440 spa_aux_check_removed(&spa
->spa_l2cache
);
3443 if (spa_writeable(spa
)) {
3445 * Update the config cache to include the newly-imported pool.
3447 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
3451 * It's possible that the pool was expanded while it was exported.
3452 * We kick off an async task to handle this for us.
3454 spa_async_request(spa
, SPA_ASYNC_AUTOEXPAND
);
3456 mutex_exit(&spa_namespace_lock
);
3457 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3463 spa_tryimport(nvlist_t
*tryconfig
)
3465 nvlist_t
*config
= NULL
;
3471 if (nvlist_lookup_string(tryconfig
, ZPOOL_CONFIG_POOL_NAME
, &poolname
))
3474 if (nvlist_lookup_uint64(tryconfig
, ZPOOL_CONFIG_POOL_STATE
, &state
))
3478 * Create and initialize the spa structure.
3480 mutex_enter(&spa_namespace_lock
);
3481 spa
= spa_add(TRYIMPORT_NAME
, tryconfig
, NULL
);
3482 spa_activate(spa
, FREAD
);
3485 * Pass off the heavy lifting to spa_load().
3486 * Pass TRUE for mosconfig because the user-supplied config
3487 * is actually the one to trust when doing an import.
3489 error
= spa_load(spa
, SPA_LOAD_TRYIMPORT
, SPA_IMPORT_EXISTING
, B_TRUE
);
3492 * If 'tryconfig' was at least parsable, return the current config.
3494 if (spa
->spa_root_vdev
!= NULL
) {
3495 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
3496 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3498 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
3500 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_TIMESTAMP
,
3501 spa
->spa_uberblock
.ub_timestamp
) == 0);
3504 * If the bootfs property exists on this pool then we
3505 * copy it out so that external consumers can tell which
3506 * pools are bootable.
3508 if ((!error
|| error
== EEXIST
) && spa
->spa_bootfs
) {
3509 char *tmpname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
3512 * We have to play games with the name since the
3513 * pool was opened as TRYIMPORT_NAME.
3515 if (dsl_dsobj_to_dsname(spa_name(spa
),
3516 spa
->spa_bootfs
, tmpname
) == 0) {
3518 char *dsname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
3520 cp
= strchr(tmpname
, '/');
3522 (void) strlcpy(dsname
, tmpname
,
3525 (void) snprintf(dsname
, MAXPATHLEN
,
3526 "%s/%s", poolname
, ++cp
);
3528 VERIFY(nvlist_add_string(config
,
3529 ZPOOL_CONFIG_BOOTFS
, dsname
) == 0);
3530 kmem_free(dsname
, MAXPATHLEN
);
3532 kmem_free(tmpname
, MAXPATHLEN
);
3536 * Add the list of hot spares and level 2 cache devices.
3538 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3539 spa_add_spares(spa
, config
);
3540 spa_add_l2cache(spa
, config
);
3541 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3545 spa_deactivate(spa
);
3547 mutex_exit(&spa_namespace_lock
);
3553 * Pool export/destroy
3555 * The act of destroying or exporting a pool is very simple. We make sure there
3556 * is no more pending I/O and any references to the pool are gone. Then, we
3557 * update the pool state and sync all the labels to disk, removing the
3558 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
3559 * we don't sync the labels or remove the configuration cache.
3562 spa_export_common(char *pool
, int new_state
, nvlist_t
**oldconfig
,
3563 boolean_t force
, boolean_t hardforce
)
3570 if (!(spa_mode_global
& FWRITE
))
3573 mutex_enter(&spa_namespace_lock
);
3574 if ((spa
= spa_lookup(pool
)) == NULL
) {
3575 mutex_exit(&spa_namespace_lock
);
3580 * Put a hold on the pool, drop the namespace lock, stop async tasks,
3581 * reacquire the namespace lock, and see if we can export.
3583 spa_open_ref(spa
, FTAG
);
3584 mutex_exit(&spa_namespace_lock
);
3585 spa_async_suspend(spa
);
3586 mutex_enter(&spa_namespace_lock
);
3587 spa_close(spa
, FTAG
);
3590 * The pool will be in core if it's openable,
3591 * in which case we can modify its state.
3593 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
&& spa
->spa_sync_on
) {
3595 * Objsets may be open only because they're dirty, so we
3596 * have to force it to sync before checking spa_refcnt.
3598 txg_wait_synced(spa
->spa_dsl_pool
, 0);
3601 * A pool cannot be exported or destroyed if there are active
3602 * references. If we are resetting a pool, allow references by
3603 * fault injection handlers.
3605 if (!spa_refcount_zero(spa
) ||
3606 (spa
->spa_inject_ref
!= 0 &&
3607 new_state
!= POOL_STATE_UNINITIALIZED
)) {
3608 spa_async_resume(spa
);
3609 mutex_exit(&spa_namespace_lock
);
3614 * A pool cannot be exported if it has an active shared spare.
3615 * This is to prevent other pools stealing the active spare
3616 * from an exported pool. At user's own will, such pool can
3617 * be forcedly exported.
3619 if (!force
&& new_state
== POOL_STATE_EXPORTED
&&
3620 spa_has_active_shared_spare(spa
)) {
3621 spa_async_resume(spa
);
3622 mutex_exit(&spa_namespace_lock
);
3627 * We want this to be reflected on every label,
3628 * so mark them all dirty. spa_unload() will do the
3629 * final sync that pushes these changes out.
3631 if (new_state
!= POOL_STATE_UNINITIALIZED
&& !hardforce
) {
3632 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3633 spa
->spa_state
= new_state
;
3634 spa
->spa_final_txg
= spa_last_synced_txg(spa
) +
3636 vdev_config_dirty(spa
->spa_root_vdev
);
3637 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3641 spa_event_notify(spa
, NULL
, ESC_ZFS_POOL_DESTROY
);
3643 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
3645 spa_deactivate(spa
);
3648 if (oldconfig
&& spa
->spa_config
)
3649 VERIFY(nvlist_dup(spa
->spa_config
, oldconfig
, 0) == 0);
3651 if (new_state
!= POOL_STATE_UNINITIALIZED
) {
3653 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
3656 mutex_exit(&spa_namespace_lock
);
3662 * Destroy a storage pool.
3665 spa_destroy(char *pool
)
3667 return (spa_export_common(pool
, POOL_STATE_DESTROYED
, NULL
,
3672 * Export a storage pool.
3675 spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
3676 boolean_t hardforce
)
3678 return (spa_export_common(pool
, POOL_STATE_EXPORTED
, oldconfig
,
3683 * Similar to spa_export(), this unloads the spa_t without actually removing it
3684 * from the namespace in any way.
3687 spa_reset(char *pool
)
3689 return (spa_export_common(pool
, POOL_STATE_UNINITIALIZED
, NULL
,
3694 * ==========================================================================
3695 * Device manipulation
3696 * ==========================================================================
3700 * Add a device to a storage pool.
3703 spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
)
3707 vdev_t
*rvd
= spa
->spa_root_vdev
;
3709 nvlist_t
**spares
, **l2cache
;
3710 uint_t nspares
, nl2cache
;
3713 ASSERT(spa_writeable(spa
));
3715 txg
= spa_vdev_enter(spa
);
3717 if ((error
= spa_config_parse(spa
, &vd
, nvroot
, NULL
, 0,
3718 VDEV_ALLOC_ADD
)) != 0)
3719 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
3721 spa
->spa_pending_vdev
= vd
; /* spa_vdev_exit() will clear this */
3723 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
, &spares
,
3727 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
, &l2cache
,
3731 if (vd
->vdev_children
== 0 && nspares
== 0 && nl2cache
== 0)
3732 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
3734 if (vd
->vdev_children
!= 0 &&
3735 (error
= vdev_create(vd
, txg
, B_FALSE
)) != 0)
3736 return (spa_vdev_exit(spa
, vd
, txg
, error
));
3739 * We must validate the spares and l2cache devices after checking the
3740 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
3742 if ((error
= spa_validate_aux(spa
, nvroot
, txg
, VDEV_ALLOC_ADD
)) != 0)
3743 return (spa_vdev_exit(spa
, vd
, txg
, error
));
3746 * Transfer each new top-level vdev from vd to rvd.
3748 for (c
= 0; c
< vd
->vdev_children
; c
++) {
3751 * Set the vdev id to the first hole, if one exists.
3753 for (id
= 0; id
< rvd
->vdev_children
; id
++) {
3754 if (rvd
->vdev_child
[id
]->vdev_ishole
) {
3755 vdev_free(rvd
->vdev_child
[id
]);
3759 tvd
= vd
->vdev_child
[c
];
3760 vdev_remove_child(vd
, tvd
);
3762 vdev_add_child(rvd
, tvd
);
3763 vdev_config_dirty(tvd
);
3767 spa_set_aux_vdevs(&spa
->spa_spares
, spares
, nspares
,
3768 ZPOOL_CONFIG_SPARES
);
3769 spa_load_spares(spa
);
3770 spa
->spa_spares
.sav_sync
= B_TRUE
;
3773 if (nl2cache
!= 0) {
3774 spa_set_aux_vdevs(&spa
->spa_l2cache
, l2cache
, nl2cache
,
3775 ZPOOL_CONFIG_L2CACHE
);
3776 spa_load_l2cache(spa
);
3777 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3781 * We have to be careful when adding new vdevs to an existing pool.
3782 * If other threads start allocating from these vdevs before we
3783 * sync the config cache, and we lose power, then upon reboot we may
3784 * fail to open the pool because there are DVAs that the config cache
3785 * can't translate. Therefore, we first add the vdevs without
3786 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
3787 * and then let spa_config_update() initialize the new metaslabs.
3789 * spa_load() checks for added-but-not-initialized vdevs, so that
3790 * if we lose power at any point in this sequence, the remaining
3791 * steps will be completed the next time we load the pool.
3793 (void) spa_vdev_exit(spa
, vd
, txg
, 0);
3795 mutex_enter(&spa_namespace_lock
);
3796 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
3797 mutex_exit(&spa_namespace_lock
);
3803 * Attach a device to a mirror. The arguments are the path to any device
3804 * in the mirror, and the nvroot for the new device. If the path specifies
3805 * a device that is not mirrored, we automatically insert the mirror vdev.
3807 * If 'replacing' is specified, the new device is intended to replace the
3808 * existing device; in this case the two devices are made into their own
3809 * mirror using the 'replacing' vdev, which is functionally identical to
3810 * the mirror vdev (it actually reuses all the same ops) but has a few
3811 * extra rules: you can't attach to it after it's been created, and upon
3812 * completion of resilvering, the first disk (the one being replaced)
3813 * is automatically detached.
3816 spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
, int replacing
)
3818 uint64_t txg
, dtl_max_txg
;
3819 vdev_t
*rvd
= spa
->spa_root_vdev
;
3820 vdev_t
*oldvd
, *newvd
, *newrootvd
, *pvd
, *tvd
;
3822 char *oldvdpath
, *newvdpath
;
3826 ASSERT(spa_writeable(spa
));
3828 txg
= spa_vdev_enter(spa
);
3830 oldvd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
3833 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
3835 if (!oldvd
->vdev_ops
->vdev_op_leaf
)
3836 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
3838 pvd
= oldvd
->vdev_parent
;
3840 if ((error
= spa_config_parse(spa
, &newrootvd
, nvroot
, NULL
, 0,
3841 VDEV_ALLOC_ADD
)) != 0)
3842 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
3844 if (newrootvd
->vdev_children
!= 1)
3845 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
3847 newvd
= newrootvd
->vdev_child
[0];
3849 if (!newvd
->vdev_ops
->vdev_op_leaf
)
3850 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
3852 if ((error
= vdev_create(newrootvd
, txg
, replacing
)) != 0)
3853 return (spa_vdev_exit(spa
, newrootvd
, txg
, error
));
3856 * Spares can't replace logs
3858 if (oldvd
->vdev_top
->vdev_islog
&& newvd
->vdev_isspare
)
3859 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3863 * For attach, the only allowable parent is a mirror or the root
3866 if (pvd
->vdev_ops
!= &vdev_mirror_ops
&&
3867 pvd
->vdev_ops
!= &vdev_root_ops
)
3868 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3870 pvops
= &vdev_mirror_ops
;
3873 * Active hot spares can only be replaced by inactive hot
3876 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
3877 oldvd
->vdev_isspare
&&
3878 !spa_has_spare(spa
, newvd
->vdev_guid
))
3879 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3882 * If the source is a hot spare, and the parent isn't already a
3883 * spare, then we want to create a new hot spare. Otherwise, we
3884 * want to create a replacing vdev. The user is not allowed to
3885 * attach to a spared vdev child unless the 'isspare' state is
3886 * the same (spare replaces spare, non-spare replaces
3889 if (pvd
->vdev_ops
== &vdev_replacing_ops
&&
3890 spa_version(spa
) < SPA_VERSION_MULTI_REPLACE
) {
3891 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3892 } else if (pvd
->vdev_ops
== &vdev_spare_ops
&&
3893 newvd
->vdev_isspare
!= oldvd
->vdev_isspare
) {
3894 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3897 if (newvd
->vdev_isspare
)
3898 pvops
= &vdev_spare_ops
;
3900 pvops
= &vdev_replacing_ops
;
3904 * Make sure the new device is big enough.
3906 if (newvd
->vdev_asize
< vdev_get_min_asize(oldvd
))
3907 return (spa_vdev_exit(spa
, newrootvd
, txg
, EOVERFLOW
));
3910 * The new device cannot have a higher alignment requirement
3911 * than the top-level vdev.
3913 if (newvd
->vdev_ashift
> oldvd
->vdev_top
->vdev_ashift
)
3914 return (spa_vdev_exit(spa
, newrootvd
, txg
, EDOM
));
3917 * If this is an in-place replacement, update oldvd's path and devid
3918 * to make it distinguishable from newvd, and unopenable from now on.
3920 if (strcmp(oldvd
->vdev_path
, newvd
->vdev_path
) == 0) {
3921 spa_strfree(oldvd
->vdev_path
);
3922 oldvd
->vdev_path
= kmem_alloc(strlen(newvd
->vdev_path
) + 5,
3924 (void) sprintf(oldvd
->vdev_path
, "%s/%s",
3925 newvd
->vdev_path
, "old");
3926 if (oldvd
->vdev_devid
!= NULL
) {
3927 spa_strfree(oldvd
->vdev_devid
);
3928 oldvd
->vdev_devid
= NULL
;
3932 /* mark the device being resilvered */
3933 newvd
->vdev_resilvering
= B_TRUE
;
3936 * If the parent is not a mirror, or if we're replacing, insert the new
3937 * mirror/replacing/spare vdev above oldvd.
3939 if (pvd
->vdev_ops
!= pvops
)
3940 pvd
= vdev_add_parent(oldvd
, pvops
);
3942 ASSERT(pvd
->vdev_top
->vdev_parent
== rvd
);
3943 ASSERT(pvd
->vdev_ops
== pvops
);
3944 ASSERT(oldvd
->vdev_parent
== pvd
);
3947 * Extract the new device from its root and add it to pvd.
3949 vdev_remove_child(newrootvd
, newvd
);
3950 newvd
->vdev_id
= pvd
->vdev_children
;
3951 newvd
->vdev_crtxg
= oldvd
->vdev_crtxg
;
3952 vdev_add_child(pvd
, newvd
);
3954 tvd
= newvd
->vdev_top
;
3955 ASSERT(pvd
->vdev_top
== tvd
);
3956 ASSERT(tvd
->vdev_parent
== rvd
);
3958 vdev_config_dirty(tvd
);
3961 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
3962 * for any dmu_sync-ed blocks. It will propagate upward when
3963 * spa_vdev_exit() calls vdev_dtl_reassess().
3965 dtl_max_txg
= txg
+ TXG_CONCURRENT_STATES
;
3967 vdev_dtl_dirty(newvd
, DTL_MISSING
, TXG_INITIAL
,
3968 dtl_max_txg
- TXG_INITIAL
);
3970 if (newvd
->vdev_isspare
) {
3971 spa_spare_activate(newvd
);
3972 spa_event_notify(spa
, newvd
, ESC_ZFS_VDEV_SPARE
);
3975 oldvdpath
= spa_strdup(oldvd
->vdev_path
);
3976 newvdpath
= spa_strdup(newvd
->vdev_path
);
3977 newvd_isspare
= newvd
->vdev_isspare
;
3980 * Mark newvd's DTL dirty in this txg.
3982 vdev_dirty(tvd
, VDD_DTL
, newvd
, txg
);
3985 * Restart the resilver
3987 dsl_resilver_restart(spa
->spa_dsl_pool
, dtl_max_txg
);
3992 (void) spa_vdev_exit(spa
, newrootvd
, dtl_max_txg
, 0);
3994 spa_history_log_internal(LOG_POOL_VDEV_ATTACH
, spa
, NULL
,
3995 "%s vdev=%s %s vdev=%s",
3996 replacing
&& newvd_isspare
? "spare in" :
3997 replacing
? "replace" : "attach", newvdpath
,
3998 replacing
? "for" : "to", oldvdpath
);
4000 spa_strfree(oldvdpath
);
4001 spa_strfree(newvdpath
);
4003 if (spa
->spa_bootfs
)
4004 spa_event_notify(spa
, newvd
, ESC_ZFS_BOOTFS_VDEV_ATTACH
);
4010 * Detach a device from a mirror or replacing vdev.
4011 * If 'replace_done' is specified, only detach if the parent
4012 * is a replacing vdev.
4015 spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
, int replace_done
)
4019 vdev_t
*rvd
= spa
->spa_root_vdev
;
4020 vdev_t
*vd
, *pvd
, *cvd
, *tvd
;
4021 boolean_t unspare
= B_FALSE
;
4022 uint64_t unspare_guid
;
4026 ASSERT(spa_writeable(spa
));
4028 txg
= spa_vdev_enter(spa
);
4030 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4033 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4035 if (!vd
->vdev_ops
->vdev_op_leaf
)
4036 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4038 pvd
= vd
->vdev_parent
;
4041 * If the parent/child relationship is not as expected, don't do it.
4042 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4043 * vdev that's replacing B with C. The user's intent in replacing
4044 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4045 * the replace by detaching C, the expected behavior is to end up
4046 * M(A,B). But suppose that right after deciding to detach C,
4047 * the replacement of B completes. We would have M(A,C), and then
4048 * ask to detach C, which would leave us with just A -- not what
4049 * the user wanted. To prevent this, we make sure that the
4050 * parent/child relationship hasn't changed -- in this example,
4051 * that C's parent is still the replacing vdev R.
4053 if (pvd
->vdev_guid
!= pguid
&& pguid
!= 0)
4054 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4057 * Only 'replacing' or 'spare' vdevs can be replaced.
4059 if (replace_done
&& pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4060 pvd
->vdev_ops
!= &vdev_spare_ops
)
4061 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4063 ASSERT(pvd
->vdev_ops
!= &vdev_spare_ops
||
4064 spa_version(spa
) >= SPA_VERSION_SPARES
);
4067 * Only mirror, replacing, and spare vdevs support detach.
4069 if (pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4070 pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4071 pvd
->vdev_ops
!= &vdev_spare_ops
)
4072 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4075 * If this device has the only valid copy of some data,
4076 * we cannot safely detach it.
4078 if (vdev_dtl_required(vd
))
4079 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4081 ASSERT(pvd
->vdev_children
>= 2);
4084 * If we are detaching the second disk from a replacing vdev, then
4085 * check to see if we changed the original vdev's path to have "/old"
4086 * at the end in spa_vdev_attach(). If so, undo that change now.
4088 if (pvd
->vdev_ops
== &vdev_replacing_ops
&& vd
->vdev_id
> 0 &&
4089 vd
->vdev_path
!= NULL
) {
4090 size_t len
= strlen(vd
->vdev_path
);
4092 for (c
= 0; c
< pvd
->vdev_children
; c
++) {
4093 cvd
= pvd
->vdev_child
[c
];
4095 if (cvd
== vd
|| cvd
->vdev_path
== NULL
)
4098 if (strncmp(cvd
->vdev_path
, vd
->vdev_path
, len
) == 0 &&
4099 strcmp(cvd
->vdev_path
+ len
, "/old") == 0) {
4100 spa_strfree(cvd
->vdev_path
);
4101 cvd
->vdev_path
= spa_strdup(vd
->vdev_path
);
4108 * If we are detaching the original disk from a spare, then it implies
4109 * that the spare should become a real disk, and be removed from the
4110 * active spare list for the pool.
4112 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4114 pvd
->vdev_child
[pvd
->vdev_children
- 1]->vdev_isspare
)
4118 * Erase the disk labels so the disk can be used for other things.
4119 * This must be done after all other error cases are handled,
4120 * but before we disembowel vd (so we can still do I/O to it).
4121 * But if we can't do it, don't treat the error as fatal --
4122 * it may be that the unwritability of the disk is the reason
4123 * it's being detached!
4125 error
= vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4128 * Remove vd from its parent and compact the parent's children.
4130 vdev_remove_child(pvd
, vd
);
4131 vdev_compact_children(pvd
);
4134 * Remember one of the remaining children so we can get tvd below.
4136 cvd
= pvd
->vdev_child
[pvd
->vdev_children
- 1];
4139 * If we need to remove the remaining child from the list of hot spares,
4140 * do it now, marking the vdev as no longer a spare in the process.
4141 * We must do this before vdev_remove_parent(), because that can
4142 * change the GUID if it creates a new toplevel GUID. For a similar
4143 * reason, we must remove the spare now, in the same txg as the detach;
4144 * otherwise someone could attach a new sibling, change the GUID, and
4145 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
4148 ASSERT(cvd
->vdev_isspare
);
4149 spa_spare_remove(cvd
);
4150 unspare_guid
= cvd
->vdev_guid
;
4151 (void) spa_vdev_remove(spa
, unspare_guid
, B_TRUE
);
4152 cvd
->vdev_unspare
= B_TRUE
;
4156 * If the parent mirror/replacing vdev only has one child,
4157 * the parent is no longer needed. Remove it from the tree.
4159 if (pvd
->vdev_children
== 1) {
4160 if (pvd
->vdev_ops
== &vdev_spare_ops
)
4161 cvd
->vdev_unspare
= B_FALSE
;
4162 vdev_remove_parent(cvd
);
4163 cvd
->vdev_resilvering
= B_FALSE
;
4168 * We don't set tvd until now because the parent we just removed
4169 * may have been the previous top-level vdev.
4171 tvd
= cvd
->vdev_top
;
4172 ASSERT(tvd
->vdev_parent
== rvd
);
4175 * Reevaluate the parent vdev state.
4177 vdev_propagate_state(cvd
);
4180 * If the 'autoexpand' property is set on the pool then automatically
4181 * try to expand the size of the pool. For example if the device we
4182 * just detached was smaller than the others, it may be possible to
4183 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
4184 * first so that we can obtain the updated sizes of the leaf vdevs.
4186 if (spa
->spa_autoexpand
) {
4188 vdev_expand(tvd
, txg
);
4191 vdev_config_dirty(tvd
);
4194 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
4195 * vd->vdev_detached is set and free vd's DTL object in syncing context.
4196 * But first make sure we're not on any *other* txg's DTL list, to
4197 * prevent vd from being accessed after it's freed.
4199 vdpath
= spa_strdup(vd
->vdev_path
);
4200 for (t
= 0; t
< TXG_SIZE
; t
++)
4201 (void) txg_list_remove_this(&tvd
->vdev_dtl_list
, vd
, t
);
4202 vd
->vdev_detached
= B_TRUE
;
4203 vdev_dirty(tvd
, VDD_DTL
, vd
, txg
);
4205 spa_event_notify(spa
, vd
, ESC_ZFS_VDEV_REMOVE
);
4207 /* hang on to the spa before we release the lock */
4208 spa_open_ref(spa
, FTAG
);
4210 error
= spa_vdev_exit(spa
, vd
, txg
, 0);
4212 spa_history_log_internal(LOG_POOL_VDEV_DETACH
, spa
, NULL
,
4214 spa_strfree(vdpath
);
4217 * If this was the removal of the original device in a hot spare vdev,
4218 * then we want to go through and remove the device from the hot spare
4219 * list of every other pool.
4222 spa_t
*altspa
= NULL
;
4224 mutex_enter(&spa_namespace_lock
);
4225 while ((altspa
= spa_next(altspa
)) != NULL
) {
4226 if (altspa
->spa_state
!= POOL_STATE_ACTIVE
||
4230 spa_open_ref(altspa
, FTAG
);
4231 mutex_exit(&spa_namespace_lock
);
4232 (void) spa_vdev_remove(altspa
, unspare_guid
, B_TRUE
);
4233 mutex_enter(&spa_namespace_lock
);
4234 spa_close(altspa
, FTAG
);
4236 mutex_exit(&spa_namespace_lock
);
4238 /* search the rest of the vdevs for spares to remove */
4239 spa_vdev_resilver_done(spa
);
4242 /* all done with the spa; OK to release */
4243 mutex_enter(&spa_namespace_lock
);
4244 spa_close(spa
, FTAG
);
4245 mutex_exit(&spa_namespace_lock
);
4251 * Split a set of devices from their mirrors, and create a new pool from them.
4254 spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
4255 nvlist_t
*props
, boolean_t exp
)
4258 uint64_t txg
, *glist
;
4260 uint_t c
, children
, lastlog
;
4261 nvlist_t
**child
, *nvl
, *tmp
;
4263 char *altroot
= NULL
;
4264 vdev_t
*rvd
, **vml
= NULL
; /* vdev modify list */
4265 boolean_t activate_slog
;
4267 ASSERT(spa_writeable(spa
));
4269 txg
= spa_vdev_enter(spa
);
4271 /* clear the log and flush everything up to now */
4272 activate_slog
= spa_passivate_log(spa
);
4273 (void) spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4274 error
= spa_offline_log(spa
);
4275 txg
= spa_vdev_config_enter(spa
);
4278 spa_activate_log(spa
);
4281 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4283 /* check new spa name before going any further */
4284 if (spa_lookup(newname
) != NULL
)
4285 return (spa_vdev_exit(spa
, NULL
, txg
, EEXIST
));
4288 * scan through all the children to ensure they're all mirrors
4290 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
) != 0 ||
4291 nvlist_lookup_nvlist_array(nvl
, ZPOOL_CONFIG_CHILDREN
, &child
,
4293 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4295 /* first, check to ensure we've got the right child count */
4296 rvd
= spa
->spa_root_vdev
;
4298 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
4299 vdev_t
*vd
= rvd
->vdev_child
[c
];
4301 /* don't count the holes & logs as children */
4302 if (vd
->vdev_islog
|| vd
->vdev_ishole
) {
4310 if (children
!= (lastlog
!= 0 ? lastlog
: rvd
->vdev_children
))
4311 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4313 /* next, ensure no spare or cache devices are part of the split */
4314 if (nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_SPARES
, &tmp
) == 0 ||
4315 nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_L2CACHE
, &tmp
) == 0)
4316 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4318 vml
= kmem_zalloc(children
* sizeof (vdev_t
*), KM_SLEEP
);
4319 glist
= kmem_zalloc(children
* sizeof (uint64_t), KM_SLEEP
);
4321 /* then, loop over each vdev and validate it */
4322 for (c
= 0; c
< children
; c
++) {
4323 uint64_t is_hole
= 0;
4325 (void) nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_IS_HOLE
,
4329 if (spa
->spa_root_vdev
->vdev_child
[c
]->vdev_ishole
||
4330 spa
->spa_root_vdev
->vdev_child
[c
]->vdev_islog
) {
4338 /* which disk is going to be split? */
4339 if (nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_GUID
,
4345 /* look it up in the spa */
4346 vml
[c
] = spa_lookup_by_guid(spa
, glist
[c
], B_FALSE
);
4347 if (vml
[c
] == NULL
) {
4352 /* make sure there's nothing stopping the split */
4353 if (vml
[c
]->vdev_parent
->vdev_ops
!= &vdev_mirror_ops
||
4354 vml
[c
]->vdev_islog
||
4355 vml
[c
]->vdev_ishole
||
4356 vml
[c
]->vdev_isspare
||
4357 vml
[c
]->vdev_isl2cache
||
4358 !vdev_writeable(vml
[c
]) ||
4359 vml
[c
]->vdev_children
!= 0 ||
4360 vml
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
||
4361 c
!= spa
->spa_root_vdev
->vdev_child
[c
]->vdev_id
) {
4366 if (vdev_dtl_required(vml
[c
])) {
4371 /* we need certain info from the top level */
4372 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_ARRAY
,
4373 vml
[c
]->vdev_top
->vdev_ms_array
) == 0);
4374 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_SHIFT
,
4375 vml
[c
]->vdev_top
->vdev_ms_shift
) == 0);
4376 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASIZE
,
4377 vml
[c
]->vdev_top
->vdev_asize
) == 0);
4378 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASHIFT
,
4379 vml
[c
]->vdev_top
->vdev_ashift
) == 0);
4383 kmem_free(vml
, children
* sizeof (vdev_t
*));
4384 kmem_free(glist
, children
* sizeof (uint64_t));
4385 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4388 /* stop writers from using the disks */
4389 for (c
= 0; c
< children
; c
++) {
4391 vml
[c
]->vdev_offline
= B_TRUE
;
4393 vdev_reopen(spa
->spa_root_vdev
);
4396 * Temporarily record the splitting vdevs in the spa config. This
4397 * will disappear once the config is regenerated.
4399 VERIFY(nvlist_alloc(&nvl
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4400 VERIFY(nvlist_add_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
4401 glist
, children
) == 0);
4402 kmem_free(glist
, children
* sizeof (uint64_t));
4404 mutex_enter(&spa
->spa_props_lock
);
4405 VERIFY(nvlist_add_nvlist(spa
->spa_config
, ZPOOL_CONFIG_SPLIT
,
4407 mutex_exit(&spa
->spa_props_lock
);
4408 spa
->spa_config_splitting
= nvl
;
4409 vdev_config_dirty(spa
->spa_root_vdev
);
4411 /* configure and create the new pool */
4412 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
, newname
) == 0);
4413 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
4414 exp
? POOL_STATE_EXPORTED
: POOL_STATE_ACTIVE
) == 0);
4415 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
4416 spa_version(spa
)) == 0);
4417 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
4418 spa
->spa_config_txg
) == 0);
4419 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
4420 spa_generate_guid(NULL
)) == 0);
4421 (void) nvlist_lookup_string(props
,
4422 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
4424 /* add the new pool to the namespace */
4425 newspa
= spa_add(newname
, config
, altroot
);
4426 newspa
->spa_config_txg
= spa
->spa_config_txg
;
4427 spa_set_log_state(newspa
, SPA_LOG_CLEAR
);
4429 /* release the spa config lock, retaining the namespace lock */
4430 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4432 if (zio_injection_enabled
)
4433 zio_handle_panic_injection(spa
, FTAG
, 1);
4435 spa_activate(newspa
, spa_mode_global
);
4436 spa_async_suspend(newspa
);
4438 /* create the new pool from the disks of the original pool */
4439 error
= spa_load(newspa
, SPA_LOAD_IMPORT
, SPA_IMPORT_ASSEMBLE
, B_TRUE
);
4443 /* if that worked, generate a real config for the new pool */
4444 if (newspa
->spa_root_vdev
!= NULL
) {
4445 VERIFY(nvlist_alloc(&newspa
->spa_config_splitting
,
4446 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4447 VERIFY(nvlist_add_uint64(newspa
->spa_config_splitting
,
4448 ZPOOL_CONFIG_SPLIT_GUID
, spa_guid(spa
)) == 0);
4449 spa_config_set(newspa
, spa_config_generate(newspa
, NULL
, -1ULL,
4454 if (props
!= NULL
) {
4455 spa_configfile_set(newspa
, props
, B_FALSE
);
4456 error
= spa_prop_set(newspa
, props
);
4461 /* flush everything */
4462 txg
= spa_vdev_config_enter(newspa
);
4463 vdev_config_dirty(newspa
->spa_root_vdev
);
4464 (void) spa_vdev_config_exit(newspa
, NULL
, txg
, 0, FTAG
);
4466 if (zio_injection_enabled
)
4467 zio_handle_panic_injection(spa
, FTAG
, 2);
4469 spa_async_resume(newspa
);
4471 /* finally, update the original pool's config */
4472 txg
= spa_vdev_config_enter(spa
);
4473 tx
= dmu_tx_create_dd(spa_get_dsl(spa
)->dp_mos_dir
);
4474 error
= dmu_tx_assign(tx
, TXG_WAIT
);
4477 for (c
= 0; c
< children
; c
++) {
4478 if (vml
[c
] != NULL
) {
4481 spa_history_log_internal(LOG_POOL_VDEV_DETACH
,
4487 vdev_config_dirty(spa
->spa_root_vdev
);
4488 spa
->spa_config_splitting
= NULL
;
4492 (void) spa_vdev_exit(spa
, NULL
, txg
, 0);
4494 if (zio_injection_enabled
)
4495 zio_handle_panic_injection(spa
, FTAG
, 3);
4497 /* split is complete; log a history record */
4498 spa_history_log_internal(LOG_POOL_SPLIT
, newspa
, NULL
,
4499 "split new pool %s from pool %s", newname
, spa_name(spa
));
4501 kmem_free(vml
, children
* sizeof (vdev_t
*));
4503 /* if we're not going to mount the filesystems in userland, export */
4505 error
= spa_export_common(newname
, POOL_STATE_EXPORTED
, NULL
,
4512 spa_deactivate(newspa
);
4515 txg
= spa_vdev_config_enter(spa
);
4517 /* re-online all offlined disks */
4518 for (c
= 0; c
< children
; c
++) {
4520 vml
[c
]->vdev_offline
= B_FALSE
;
4522 vdev_reopen(spa
->spa_root_vdev
);
4524 nvlist_free(spa
->spa_config_splitting
);
4525 spa
->spa_config_splitting
= NULL
;
4526 (void) spa_vdev_exit(spa
, NULL
, txg
, error
);
4528 kmem_free(vml
, children
* sizeof (vdev_t
*));
4533 spa_nvlist_lookup_by_guid(nvlist_t
**nvpp
, int count
, uint64_t target_guid
)
4537 for (i
= 0; i
< count
; i
++) {
4540 VERIFY(nvlist_lookup_uint64(nvpp
[i
], ZPOOL_CONFIG_GUID
,
4543 if (guid
== target_guid
)
4551 spa_vdev_remove_aux(nvlist_t
*config
, char *name
, nvlist_t
**dev
, int count
,
4552 nvlist_t
*dev_to_remove
)
4554 nvlist_t
**newdev
= NULL
;
4558 newdev
= kmem_alloc((count
- 1) * sizeof (void *), KM_SLEEP
);
4560 for (i
= 0, j
= 0; i
< count
; i
++) {
4561 if (dev
[i
] == dev_to_remove
)
4563 VERIFY(nvlist_dup(dev
[i
], &newdev
[j
++], KM_SLEEP
) == 0);
4566 VERIFY(nvlist_remove(config
, name
, DATA_TYPE_NVLIST_ARRAY
) == 0);
4567 VERIFY(nvlist_add_nvlist_array(config
, name
, newdev
, count
- 1) == 0);
4569 for (i
= 0; i
< count
- 1; i
++)
4570 nvlist_free(newdev
[i
]);
4573 kmem_free(newdev
, (count
- 1) * sizeof (void *));
4577 * Evacuate the device.
4580 spa_vdev_remove_evacuate(spa_t
*spa
, vdev_t
*vd
)
4585 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
4586 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
4587 ASSERT(vd
== vd
->vdev_top
);
4590 * Evacuate the device. We don't hold the config lock as writer
4591 * since we need to do I/O but we do keep the
4592 * spa_namespace_lock held. Once this completes the device
4593 * should no longer have any blocks allocated on it.
4595 if (vd
->vdev_islog
) {
4596 if (vd
->vdev_stat
.vs_alloc
!= 0)
4597 error
= spa_offline_log(spa
);
4606 * The evacuation succeeded. Remove any remaining MOS metadata
4607 * associated with this vdev, and wait for these changes to sync.
4609 ASSERT3U(vd
->vdev_stat
.vs_alloc
, ==, 0);
4610 txg
= spa_vdev_config_enter(spa
);
4611 vd
->vdev_removing
= B_TRUE
;
4612 vdev_dirty(vd
, 0, NULL
, txg
);
4613 vdev_config_dirty(vd
);
4614 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4620 * Complete the removal by cleaning up the namespace.
4623 spa_vdev_remove_from_namespace(spa_t
*spa
, vdev_t
*vd
)
4625 vdev_t
*rvd
= spa
->spa_root_vdev
;
4626 uint64_t id
= vd
->vdev_id
;
4627 boolean_t last_vdev
= (id
== (rvd
->vdev_children
- 1));
4629 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
4630 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
4631 ASSERT(vd
== vd
->vdev_top
);
4634 * Only remove any devices which are empty.
4636 if (vd
->vdev_stat
.vs_alloc
!= 0)
4639 (void) vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4641 if (list_link_active(&vd
->vdev_state_dirty_node
))
4642 vdev_state_clean(vd
);
4643 if (list_link_active(&vd
->vdev_config_dirty_node
))
4644 vdev_config_clean(vd
);
4649 vdev_compact_children(rvd
);
4651 vd
= vdev_alloc_common(spa
, id
, 0, &vdev_hole_ops
);
4652 vdev_add_child(rvd
, vd
);
4654 vdev_config_dirty(rvd
);
4657 * Reassess the health of our root vdev.
4663 * Remove a device from the pool -
4665 * Removing a device from the vdev namespace requires several steps
4666 * and can take a significant amount of time. As a result we use
4667 * the spa_vdev_config_[enter/exit] functions which allow us to
4668 * grab and release the spa_config_lock while still holding the namespace
4669 * lock. During each step the configuration is synced out.
4673 * Remove a device from the pool. Currently, this supports removing only hot
4674 * spares, slogs, and level 2 ARC devices.
4677 spa_vdev_remove(spa_t
*spa
, uint64_t guid
, boolean_t unspare
)
4680 metaslab_group_t
*mg
;
4681 nvlist_t
**spares
, **l2cache
, *nv
;
4683 uint_t nspares
, nl2cache
;
4685 boolean_t locked
= MUTEX_HELD(&spa_namespace_lock
);
4687 ASSERT(spa_writeable(spa
));
4690 txg
= spa_vdev_enter(spa
);
4692 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4694 if (spa
->spa_spares
.sav_vdevs
!= NULL
&&
4695 nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
4696 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0 &&
4697 (nv
= spa_nvlist_lookup_by_guid(spares
, nspares
, guid
)) != NULL
) {
4699 * Only remove the hot spare if it's not currently in use
4702 if (vd
== NULL
|| unspare
) {
4703 spa_vdev_remove_aux(spa
->spa_spares
.sav_config
,
4704 ZPOOL_CONFIG_SPARES
, spares
, nspares
, nv
);
4705 spa_load_spares(spa
);
4706 spa
->spa_spares
.sav_sync
= B_TRUE
;
4710 } else if (spa
->spa_l2cache
.sav_vdevs
!= NULL
&&
4711 nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
4712 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0 &&
4713 (nv
= spa_nvlist_lookup_by_guid(l2cache
, nl2cache
, guid
)) != NULL
) {
4715 * Cache devices can always be removed.
4717 spa_vdev_remove_aux(spa
->spa_l2cache
.sav_config
,
4718 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
, nv
);
4719 spa_load_l2cache(spa
);
4720 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4721 } else if (vd
!= NULL
&& vd
->vdev_islog
) {
4723 ASSERT(vd
== vd
->vdev_top
);
4726 * XXX - Once we have bp-rewrite this should
4727 * become the common case.
4733 * Stop allocating from this vdev.
4735 metaslab_group_passivate(mg
);
4738 * Wait for the youngest allocations and frees to sync,
4739 * and then wait for the deferral of those frees to finish.
4741 spa_vdev_config_exit(spa
, NULL
,
4742 txg
+ TXG_CONCURRENT_STATES
+ TXG_DEFER_SIZE
, 0, FTAG
);
4745 * Attempt to evacuate the vdev.
4747 error
= spa_vdev_remove_evacuate(spa
, vd
);
4749 txg
= spa_vdev_config_enter(spa
);
4752 * If we couldn't evacuate the vdev, unwind.
4755 metaslab_group_activate(mg
);
4756 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4760 * Clean up the vdev namespace.
4762 spa_vdev_remove_from_namespace(spa
, vd
);
4764 } else if (vd
!= NULL
) {
4766 * Normal vdevs cannot be removed (yet).
4771 * There is no vdev of any kind with the specified guid.
4777 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4783 * Find any device that's done replacing, or a vdev marked 'unspare' that's
4784 * current spared, so we can detach it.
4787 spa_vdev_resilver_done_hunt(vdev_t
*vd
)
4789 vdev_t
*newvd
, *oldvd
;
4792 for (c
= 0; c
< vd
->vdev_children
; c
++) {
4793 oldvd
= spa_vdev_resilver_done_hunt(vd
->vdev_child
[c
]);
4799 * Check for a completed replacement. We always consider the first
4800 * vdev in the list to be the oldest vdev, and the last one to be
4801 * the newest (see spa_vdev_attach() for how that works). In
4802 * the case where the newest vdev is faulted, we will not automatically
4803 * remove it after a resilver completes. This is OK as it will require
4804 * user intervention to determine which disk the admin wishes to keep.
4806 if (vd
->vdev_ops
== &vdev_replacing_ops
) {
4807 ASSERT(vd
->vdev_children
> 1);
4809 newvd
= vd
->vdev_child
[vd
->vdev_children
- 1];
4810 oldvd
= vd
->vdev_child
[0];
4812 if (vdev_dtl_empty(newvd
, DTL_MISSING
) &&
4813 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
4814 !vdev_dtl_required(oldvd
))
4819 * Check for a completed resilver with the 'unspare' flag set.
4821 if (vd
->vdev_ops
== &vdev_spare_ops
) {
4822 vdev_t
*first
= vd
->vdev_child
[0];
4823 vdev_t
*last
= vd
->vdev_child
[vd
->vdev_children
- 1];
4825 if (last
->vdev_unspare
) {
4828 } else if (first
->vdev_unspare
) {
4835 if (oldvd
!= NULL
&&
4836 vdev_dtl_empty(newvd
, DTL_MISSING
) &&
4837 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
4838 !vdev_dtl_required(oldvd
))
4842 * If there are more than two spares attached to a disk,
4843 * and those spares are not required, then we want to
4844 * attempt to free them up now so that they can be used
4845 * by other pools. Once we're back down to a single
4846 * disk+spare, we stop removing them.
4848 if (vd
->vdev_children
> 2) {
4849 newvd
= vd
->vdev_child
[1];
4851 if (newvd
->vdev_isspare
&& last
->vdev_isspare
&&
4852 vdev_dtl_empty(last
, DTL_MISSING
) &&
4853 vdev_dtl_empty(last
, DTL_OUTAGE
) &&
4854 !vdev_dtl_required(newvd
))
4863 spa_vdev_resilver_done(spa_t
*spa
)
4865 vdev_t
*vd
, *pvd
, *ppvd
;
4866 uint64_t guid
, sguid
, pguid
, ppguid
;
4868 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4870 while ((vd
= spa_vdev_resilver_done_hunt(spa
->spa_root_vdev
)) != NULL
) {
4871 pvd
= vd
->vdev_parent
;
4872 ppvd
= pvd
->vdev_parent
;
4873 guid
= vd
->vdev_guid
;
4874 pguid
= pvd
->vdev_guid
;
4875 ppguid
= ppvd
->vdev_guid
;
4878 * If we have just finished replacing a hot spared device, then
4879 * we need to detach the parent's first child (the original hot
4882 if (ppvd
->vdev_ops
== &vdev_spare_ops
&& pvd
->vdev_id
== 0 &&
4883 ppvd
->vdev_children
== 2) {
4884 ASSERT(pvd
->vdev_ops
== &vdev_replacing_ops
);
4885 sguid
= ppvd
->vdev_child
[1]->vdev_guid
;
4887 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4888 if (spa_vdev_detach(spa
, guid
, pguid
, B_TRUE
) != 0)
4890 if (sguid
&& spa_vdev_detach(spa
, sguid
, ppguid
, B_TRUE
) != 0)
4892 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4895 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4899 * Update the stored path or FRU for this vdev.
4902 spa_vdev_set_common(spa_t
*spa
, uint64_t guid
, const char *value
,
4906 boolean_t sync
= B_FALSE
;
4908 ASSERT(spa_writeable(spa
));
4910 spa_vdev_state_enter(spa
, SCL_ALL
);
4912 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
4913 return (spa_vdev_state_exit(spa
, NULL
, ENOENT
));
4915 if (!vd
->vdev_ops
->vdev_op_leaf
)
4916 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
4919 if (strcmp(value
, vd
->vdev_path
) != 0) {
4920 spa_strfree(vd
->vdev_path
);
4921 vd
->vdev_path
= spa_strdup(value
);
4925 if (vd
->vdev_fru
== NULL
) {
4926 vd
->vdev_fru
= spa_strdup(value
);
4928 } else if (strcmp(value
, vd
->vdev_fru
) != 0) {
4929 spa_strfree(vd
->vdev_fru
);
4930 vd
->vdev_fru
= spa_strdup(value
);
4935 return (spa_vdev_state_exit(spa
, sync
? vd
: NULL
, 0));
4939 spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
)
4941 return (spa_vdev_set_common(spa
, guid
, newpath
, B_TRUE
));
4945 spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
)
4947 return (spa_vdev_set_common(spa
, guid
, newfru
, B_FALSE
));
4951 * ==========================================================================
4953 * ==========================================================================
4957 spa_scan_stop(spa_t
*spa
)
4959 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
4960 if (dsl_scan_resilvering(spa
->spa_dsl_pool
))
4962 return (dsl_scan_cancel(spa
->spa_dsl_pool
));
4966 spa_scan(spa_t
*spa
, pool_scan_func_t func
)
4968 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
4970 if (func
>= POOL_SCAN_FUNCS
|| func
== POOL_SCAN_NONE
)
4974 * If a resilver was requested, but there is no DTL on a
4975 * writeable leaf device, we have nothing to do.
4977 if (func
== POOL_SCAN_RESILVER
&&
4978 !vdev_resilver_needed(spa
->spa_root_vdev
, NULL
, NULL
)) {
4979 spa_async_request(spa
, SPA_ASYNC_RESILVER_DONE
);
4983 return (dsl_scan(spa
->spa_dsl_pool
, func
));
4987 * ==========================================================================
4988 * SPA async task processing
4989 * ==========================================================================
4993 spa_async_remove(spa_t
*spa
, vdev_t
*vd
)
4997 if (vd
->vdev_remove_wanted
) {
4998 vd
->vdev_remove_wanted
= B_FALSE
;
4999 vd
->vdev_delayed_close
= B_FALSE
;
5000 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_REMOVED
, VDEV_AUX_NONE
);
5003 * We want to clear the stats, but we don't want to do a full
5004 * vdev_clear() as that will cause us to throw away
5005 * degraded/faulted state as well as attempt to reopen the
5006 * device, all of which is a waste.
5008 vd
->vdev_stat
.vs_read_errors
= 0;
5009 vd
->vdev_stat
.vs_write_errors
= 0;
5010 vd
->vdev_stat
.vs_checksum_errors
= 0;
5012 vdev_state_dirty(vd
->vdev_top
);
5015 for (c
= 0; c
< vd
->vdev_children
; c
++)
5016 spa_async_remove(spa
, vd
->vdev_child
[c
]);
5020 spa_async_probe(spa_t
*spa
, vdev_t
*vd
)
5024 if (vd
->vdev_probe_wanted
) {
5025 vd
->vdev_probe_wanted
= B_FALSE
;
5026 vdev_reopen(vd
); /* vdev_open() does the actual probe */
5029 for (c
= 0; c
< vd
->vdev_children
; c
++)
5030 spa_async_probe(spa
, vd
->vdev_child
[c
]);
5034 spa_async_autoexpand(spa_t
*spa
, vdev_t
*vd
)
5041 if (!spa
->spa_autoexpand
)
5044 for (c
= 0; c
< vd
->vdev_children
; c
++) {
5045 vdev_t
*cvd
= vd
->vdev_child
[c
];
5046 spa_async_autoexpand(spa
, cvd
);
5049 if (!vd
->vdev_ops
->vdev_op_leaf
|| vd
->vdev_physpath
== NULL
)
5052 physpath
= kmem_zalloc(MAXPATHLEN
, KM_SLEEP
);
5053 (void) snprintf(physpath
, MAXPATHLEN
, "/devices%s", vd
->vdev_physpath
);
5055 VERIFY(nvlist_alloc(&attr
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5056 VERIFY(nvlist_add_string(attr
, DEV_PHYS_PATH
, physpath
) == 0);
5058 (void) ddi_log_sysevent(zfs_dip
, SUNW_VENDOR
, EC_DEV_STATUS
,
5059 ESC_DEV_DLE
, attr
, &eid
, DDI_SLEEP
);
5062 kmem_free(physpath
, MAXPATHLEN
);
5066 spa_async_thread(spa_t
*spa
)
5070 ASSERT(spa
->spa_sync_on
);
5072 mutex_enter(&spa
->spa_async_lock
);
5073 tasks
= spa
->spa_async_tasks
;
5074 spa
->spa_async_tasks
= 0;
5075 mutex_exit(&spa
->spa_async_lock
);
5078 * See if the config needs to be updated.
5080 if (tasks
& SPA_ASYNC_CONFIG_UPDATE
) {
5081 uint64_t old_space
, new_space
;
5083 mutex_enter(&spa_namespace_lock
);
5084 old_space
= metaslab_class_get_space(spa_normal_class(spa
));
5085 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
5086 new_space
= metaslab_class_get_space(spa_normal_class(spa
));
5087 mutex_exit(&spa_namespace_lock
);
5090 * If the pool grew as a result of the config update,
5091 * then log an internal history event.
5093 if (new_space
!= old_space
) {
5094 spa_history_log_internal(LOG_POOL_VDEV_ONLINE
,
5096 "pool '%s' size: %llu(+%llu)",
5097 spa_name(spa
), new_space
, new_space
- old_space
);
5102 * See if any devices need to be marked REMOVED.
5104 if (tasks
& SPA_ASYNC_REMOVE
) {
5105 spa_vdev_state_enter(spa
, SCL_NONE
);
5106 spa_async_remove(spa
, spa
->spa_root_vdev
);
5107 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
5108 spa_async_remove(spa
, spa
->spa_l2cache
.sav_vdevs
[i
]);
5109 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
5110 spa_async_remove(spa
, spa
->spa_spares
.sav_vdevs
[i
]);
5111 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5114 if ((tasks
& SPA_ASYNC_AUTOEXPAND
) && !spa_suspended(spa
)) {
5115 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5116 spa_async_autoexpand(spa
, spa
->spa_root_vdev
);
5117 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5121 * See if any devices need to be probed.
5123 if (tasks
& SPA_ASYNC_PROBE
) {
5124 spa_vdev_state_enter(spa
, SCL_NONE
);
5125 spa_async_probe(spa
, spa
->spa_root_vdev
);
5126 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5130 * If any devices are done replacing, detach them.
5132 if (tasks
& SPA_ASYNC_RESILVER_DONE
)
5133 spa_vdev_resilver_done(spa
);
5136 * Kick off a resilver.
5138 if (tasks
& SPA_ASYNC_RESILVER
)
5139 dsl_resilver_restart(spa
->spa_dsl_pool
, 0);
5142 * Let the world know that we're done.
5144 mutex_enter(&spa
->spa_async_lock
);
5145 spa
->spa_async_thread
= NULL
;
5146 cv_broadcast(&spa
->spa_async_cv
);
5147 mutex_exit(&spa
->spa_async_lock
);
5152 spa_async_suspend(spa_t
*spa
)
5154 mutex_enter(&spa
->spa_async_lock
);
5155 spa
->spa_async_suspended
++;
5156 while (spa
->spa_async_thread
!= NULL
)
5157 cv_wait(&spa
->spa_async_cv
, &spa
->spa_async_lock
);
5158 mutex_exit(&spa
->spa_async_lock
);
5162 spa_async_resume(spa_t
*spa
)
5164 mutex_enter(&spa
->spa_async_lock
);
5165 ASSERT(spa
->spa_async_suspended
!= 0);
5166 spa
->spa_async_suspended
--;
5167 mutex_exit(&spa
->spa_async_lock
);
5171 spa_async_dispatch(spa_t
*spa
)
5173 mutex_enter(&spa
->spa_async_lock
);
5174 if (spa
->spa_async_tasks
&& !spa
->spa_async_suspended
&&
5175 spa
->spa_async_thread
== NULL
&&
5176 rootdir
!= NULL
&& !vn_is_readonly(rootdir
))
5177 spa
->spa_async_thread
= thread_create(NULL
, 0,
5178 spa_async_thread
, spa
, 0, &p0
, TS_RUN
, maxclsyspri
);
5179 mutex_exit(&spa
->spa_async_lock
);
5183 spa_async_request(spa_t
*spa
, int task
)
5185 zfs_dbgmsg("spa=%s async request task=%u", spa
->spa_name
, task
);
5186 mutex_enter(&spa
->spa_async_lock
);
5187 spa
->spa_async_tasks
|= task
;
5188 mutex_exit(&spa
->spa_async_lock
);
5192 * ==========================================================================
5193 * SPA syncing routines
5194 * ==========================================================================
5198 bpobj_enqueue_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5201 bpobj_enqueue(bpo
, bp
, tx
);
5206 spa_free_sync_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5210 zio_nowait(zio_free_sync(zio
, zio
->io_spa
, dmu_tx_get_txg(tx
), bp
,
5216 spa_sync_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
*nv
, dmu_tx_t
*tx
)
5218 char *packed
= NULL
;
5223 VERIFY(nvlist_size(nv
, &nvsize
, NV_ENCODE_XDR
) == 0);
5226 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
5227 * information. This avoids the dbuf_will_dirty() path and
5228 * saves us a pre-read to get data we don't actually care about.
5230 bufsize
= P2ROUNDUP(nvsize
, SPA_CONFIG_BLOCKSIZE
);
5231 packed
= kmem_alloc(bufsize
, KM_SLEEP
);
5233 VERIFY(nvlist_pack(nv
, &packed
, &nvsize
, NV_ENCODE_XDR
,
5235 bzero(packed
+ nvsize
, bufsize
- nvsize
);
5237 dmu_write(spa
->spa_meta_objset
, obj
, 0, bufsize
, packed
, tx
);
5239 kmem_free(packed
, bufsize
);
5241 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
5242 dmu_buf_will_dirty(db
, tx
);
5243 *(uint64_t *)db
->db_data
= nvsize
;
5244 dmu_buf_rele(db
, FTAG
);
5248 spa_sync_aux_dev(spa_t
*spa
, spa_aux_vdev_t
*sav
, dmu_tx_t
*tx
,
5249 const char *config
, const char *entry
)
5259 * Update the MOS nvlist describing the list of available devices.
5260 * spa_validate_aux() will have already made sure this nvlist is
5261 * valid and the vdevs are labeled appropriately.
5263 if (sav
->sav_object
== 0) {
5264 sav
->sav_object
= dmu_object_alloc(spa
->spa_meta_objset
,
5265 DMU_OT_PACKED_NVLIST
, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE
,
5266 sizeof (uint64_t), tx
);
5267 VERIFY(zap_update(spa
->spa_meta_objset
,
5268 DMU_POOL_DIRECTORY_OBJECT
, entry
, sizeof (uint64_t), 1,
5269 &sav
->sav_object
, tx
) == 0);
5272 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5273 if (sav
->sav_count
== 0) {
5274 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, NULL
, 0) == 0);
5276 list
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
5277 for (i
= 0; i
< sav
->sav_count
; i
++)
5278 list
[i
] = vdev_config_generate(spa
, sav
->sav_vdevs
[i
],
5279 B_FALSE
, VDEV_CONFIG_L2CACHE
);
5280 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, list
,
5281 sav
->sav_count
) == 0);
5282 for (i
= 0; i
< sav
->sav_count
; i
++)
5283 nvlist_free(list
[i
]);
5284 kmem_free(list
, sav
->sav_count
* sizeof (void *));
5287 spa_sync_nvlist(spa
, sav
->sav_object
, nvroot
, tx
);
5288 nvlist_free(nvroot
);
5290 sav
->sav_sync
= B_FALSE
;
5294 spa_sync_config_object(spa_t
*spa
, dmu_tx_t
*tx
)
5298 if (list_is_empty(&spa
->spa_config_dirty_list
))
5301 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5303 config
= spa_config_generate(spa
, spa
->spa_root_vdev
,
5304 dmu_tx_get_txg(tx
), B_FALSE
);
5306 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5308 if (spa
->spa_config_syncing
)
5309 nvlist_free(spa
->spa_config_syncing
);
5310 spa
->spa_config_syncing
= config
;
5312 spa_sync_nvlist(spa
, spa
->spa_config_object
, config
, tx
);
5316 * Set zpool properties.
5319 spa_sync_props(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
5322 objset_t
*mos
= spa
->spa_meta_objset
;
5323 nvlist_t
*nvp
= arg2
;
5328 const char *propname
;
5329 zprop_type_t proptype
;
5331 mutex_enter(&spa
->spa_props_lock
);
5334 while ((elem
= nvlist_next_nvpair(nvp
, elem
))) {
5335 switch (prop
= zpool_name_to_prop(nvpair_name(elem
))) {
5336 case ZPOOL_PROP_VERSION
:
5338 * Only set version for non-zpool-creation cases
5339 * (set/import). spa_create() needs special care
5340 * for version setting.
5342 if (tx
->tx_txg
!= TXG_INITIAL
) {
5343 VERIFY(nvpair_value_uint64(elem
,
5345 ASSERT(intval
<= SPA_VERSION
);
5346 ASSERT(intval
>= spa_version(spa
));
5347 spa
->spa_uberblock
.ub_version
= intval
;
5348 vdev_config_dirty(spa
->spa_root_vdev
);
5352 case ZPOOL_PROP_ALTROOT
:
5354 * 'altroot' is a non-persistent property. It should
5355 * have been set temporarily at creation or import time.
5357 ASSERT(spa
->spa_root
!= NULL
);
5360 case ZPOOL_PROP_READONLY
:
5361 case ZPOOL_PROP_CACHEFILE
:
5363 * 'readonly' and 'cachefile' are also non-persisitent
5369 * Set pool property values in the poolprops mos object.
5371 if (spa
->spa_pool_props_object
== 0) {
5372 VERIFY((spa
->spa_pool_props_object
=
5373 zap_create(mos
, DMU_OT_POOL_PROPS
,
5374 DMU_OT_NONE
, 0, tx
)) > 0);
5376 VERIFY(zap_update(mos
,
5377 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_PROPS
,
5378 8, 1, &spa
->spa_pool_props_object
, tx
)
5382 /* normalize the property name */
5383 propname
= zpool_prop_to_name(prop
);
5384 proptype
= zpool_prop_get_type(prop
);
5386 if (nvpair_type(elem
) == DATA_TYPE_STRING
) {
5387 ASSERT(proptype
== PROP_TYPE_STRING
);
5388 VERIFY(nvpair_value_string(elem
, &strval
) == 0);
5389 VERIFY(zap_update(mos
,
5390 spa
->spa_pool_props_object
, propname
,
5391 1, strlen(strval
) + 1, strval
, tx
) == 0);
5393 } else if (nvpair_type(elem
) == DATA_TYPE_UINT64
) {
5394 VERIFY(nvpair_value_uint64(elem
, &intval
) == 0);
5396 if (proptype
== PROP_TYPE_INDEX
) {
5398 VERIFY(zpool_prop_index_to_string(
5399 prop
, intval
, &unused
) == 0);
5401 VERIFY(zap_update(mos
,
5402 spa
->spa_pool_props_object
, propname
,
5403 8, 1, &intval
, tx
) == 0);
5405 ASSERT(0); /* not allowed */
5409 case ZPOOL_PROP_DELEGATION
:
5410 spa
->spa_delegation
= intval
;
5412 case ZPOOL_PROP_BOOTFS
:
5413 spa
->spa_bootfs
= intval
;
5415 case ZPOOL_PROP_FAILUREMODE
:
5416 spa
->spa_failmode
= intval
;
5418 case ZPOOL_PROP_AUTOEXPAND
:
5419 spa
->spa_autoexpand
= intval
;
5420 if (tx
->tx_txg
!= TXG_INITIAL
)
5421 spa_async_request(spa
,
5422 SPA_ASYNC_AUTOEXPAND
);
5424 case ZPOOL_PROP_DEDUPDITTO
:
5425 spa
->spa_dedup_ditto
= intval
;
5432 /* log internal history if this is not a zpool create */
5433 if (spa_version(spa
) >= SPA_VERSION_ZPOOL_HISTORY
&&
5434 tx
->tx_txg
!= TXG_INITIAL
) {
5435 spa_history_log_internal(LOG_POOL_PROPSET
,
5436 spa
, tx
, "%s %lld %s",
5437 nvpair_name(elem
), intval
, spa_name(spa
));
5441 mutex_exit(&spa
->spa_props_lock
);
5445 * Perform one-time upgrade on-disk changes. spa_version() does not
5446 * reflect the new version this txg, so there must be no changes this
5447 * txg to anything that the upgrade code depends on after it executes.
5448 * Therefore this must be called after dsl_pool_sync() does the sync
5452 spa_sync_upgrades(spa_t
*spa
, dmu_tx_t
*tx
)
5454 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5456 ASSERT(spa
->spa_sync_pass
== 1);
5458 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_ORIGIN
&&
5459 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_ORIGIN
) {
5460 dsl_pool_create_origin(dp
, tx
);
5462 /* Keeping the origin open increases spa_minref */
5463 spa
->spa_minref
+= 3;
5466 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_NEXT_CLONES
&&
5467 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_NEXT_CLONES
) {
5468 dsl_pool_upgrade_clones(dp
, tx
);
5471 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_DIR_CLONES
&&
5472 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_DIR_CLONES
) {
5473 dsl_pool_upgrade_dir_clones(dp
, tx
);
5475 /* Keeping the freedir open increases spa_minref */
5476 spa
->spa_minref
+= 3;
5481 * Sync the specified transaction group. New blocks may be dirtied as
5482 * part of the process, so we iterate until it converges.
5485 spa_sync(spa_t
*spa
, uint64_t txg
)
5487 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5488 objset_t
*mos
= spa
->spa_meta_objset
;
5489 bpobj_t
*defer_bpo
= &spa
->spa_deferred_bpobj
;
5490 bplist_t
*free_bpl
= &spa
->spa_free_bplist
[txg
& TXG_MASK
];
5491 vdev_t
*rvd
= spa
->spa_root_vdev
;
5497 VERIFY(spa_writeable(spa
));
5500 * Lock out configuration changes.
5502 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5504 spa
->spa_syncing_txg
= txg
;
5505 spa
->spa_sync_pass
= 0;
5508 * If there are any pending vdev state changes, convert them
5509 * into config changes that go out with this transaction group.
5511 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5512 while (list_head(&spa
->spa_state_dirty_list
) != NULL
) {
5514 * We need the write lock here because, for aux vdevs,
5515 * calling vdev_config_dirty() modifies sav_config.
5516 * This is ugly and will become unnecessary when we
5517 * eliminate the aux vdev wart by integrating all vdevs
5518 * into the root vdev tree.
5520 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5521 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_WRITER
);
5522 while ((vd
= list_head(&spa
->spa_state_dirty_list
)) != NULL
) {
5523 vdev_state_clean(vd
);
5524 vdev_config_dirty(vd
);
5526 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5527 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_READER
);
5529 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5531 tx
= dmu_tx_create_assigned(dp
, txg
);
5534 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
5535 * set spa_deflate if we have no raid-z vdevs.
5537 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_RAIDZ_DEFLATE
&&
5538 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
5541 for (i
= 0; i
< rvd
->vdev_children
; i
++) {
5542 vd
= rvd
->vdev_child
[i
];
5543 if (vd
->vdev_deflate_ratio
!= SPA_MINBLOCKSIZE
)
5546 if (i
== rvd
->vdev_children
) {
5547 spa
->spa_deflate
= TRUE
;
5548 VERIFY(0 == zap_add(spa
->spa_meta_objset
,
5549 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
5550 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
));
5555 * If anything has changed in this txg, or if someone is waiting
5556 * for this txg to sync (eg, spa_vdev_remove()), push the
5557 * deferred frees from the previous txg. If not, leave them
5558 * alone so that we don't generate work on an otherwise idle
5561 if (!txg_list_empty(&dp
->dp_dirty_datasets
, txg
) ||
5562 !txg_list_empty(&dp
->dp_dirty_dirs
, txg
) ||
5563 !txg_list_empty(&dp
->dp_sync_tasks
, txg
) ||
5564 ((dsl_scan_active(dp
->dp_scan
) ||
5565 txg_sync_waiting(dp
)) && !spa_shutting_down(spa
))) {
5566 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
5567 VERIFY3U(bpobj_iterate(defer_bpo
,
5568 spa_free_sync_cb
, zio
, tx
), ==, 0);
5569 VERIFY3U(zio_wait(zio
), ==, 0);
5573 * Iterate to convergence.
5576 int pass
= ++spa
->spa_sync_pass
;
5578 spa_sync_config_object(spa
, tx
);
5579 spa_sync_aux_dev(spa
, &spa
->spa_spares
, tx
,
5580 ZPOOL_CONFIG_SPARES
, DMU_POOL_SPARES
);
5581 spa_sync_aux_dev(spa
, &spa
->spa_l2cache
, tx
,
5582 ZPOOL_CONFIG_L2CACHE
, DMU_POOL_L2CACHE
);
5583 spa_errlog_sync(spa
, txg
);
5584 dsl_pool_sync(dp
, txg
);
5586 if (pass
<= SYNC_PASS_DEFERRED_FREE
) {
5587 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
5588 bplist_iterate(free_bpl
, spa_free_sync_cb
,
5590 VERIFY(zio_wait(zio
) == 0);
5592 bplist_iterate(free_bpl
, bpobj_enqueue_cb
,
5597 dsl_scan_sync(dp
, tx
);
5599 while ((vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, txg
)))
5603 spa_sync_upgrades(spa
, tx
);
5605 } while (dmu_objset_is_dirty(mos
, txg
));
5608 * Rewrite the vdev configuration (which includes the uberblock)
5609 * to commit the transaction group.
5611 * If there are no dirty vdevs, we sync the uberblock to a few
5612 * random top-level vdevs that are known to be visible in the
5613 * config cache (see spa_vdev_add() for a complete description).
5614 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
5618 * We hold SCL_STATE to prevent vdev open/close/etc.
5619 * while we're attempting to write the vdev labels.
5621 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5623 if (list_is_empty(&spa
->spa_config_dirty_list
)) {
5624 vdev_t
*svd
[SPA_DVAS_PER_BP
];
5626 int children
= rvd
->vdev_children
;
5627 int c0
= spa_get_random(children
);
5629 for (c
= 0; c
< children
; c
++) {
5630 vd
= rvd
->vdev_child
[(c0
+ c
) % children
];
5631 if (vd
->vdev_ms_array
== 0 || vd
->vdev_islog
)
5633 svd
[svdcount
++] = vd
;
5634 if (svdcount
== SPA_DVAS_PER_BP
)
5637 error
= vdev_config_sync(svd
, svdcount
, txg
, B_FALSE
);
5639 error
= vdev_config_sync(svd
, svdcount
, txg
,
5642 error
= vdev_config_sync(rvd
->vdev_child
,
5643 rvd
->vdev_children
, txg
, B_FALSE
);
5645 error
= vdev_config_sync(rvd
->vdev_child
,
5646 rvd
->vdev_children
, txg
, B_TRUE
);
5649 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5653 zio_suspend(spa
, NULL
);
5654 zio_resume_wait(spa
);
5659 * Clear the dirty config list.
5661 while ((vd
= list_head(&spa
->spa_config_dirty_list
)) != NULL
)
5662 vdev_config_clean(vd
);
5665 * Now that the new config has synced transactionally,
5666 * let it become visible to the config cache.
5668 if (spa
->spa_config_syncing
!= NULL
) {
5669 spa_config_set(spa
, spa
->spa_config_syncing
);
5670 spa
->spa_config_txg
= txg
;
5671 spa
->spa_config_syncing
= NULL
;
5674 spa
->spa_ubsync
= spa
->spa_uberblock
;
5676 dsl_pool_sync_done(dp
, txg
);
5679 * Update usable space statistics.
5681 while ((vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, TXG_CLEAN(txg
))))
5682 vdev_sync_done(vd
, txg
);
5684 spa_update_dspace(spa
);
5687 * It had better be the case that we didn't dirty anything
5688 * since vdev_config_sync().
5690 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
, txg
));
5691 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
5692 ASSERT(txg_list_empty(&spa
->spa_vdev_txg_list
, txg
));
5694 spa
->spa_sync_pass
= 0;
5696 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5698 spa_handle_ignored_writes(spa
);
5701 * If any async tasks have been requested, kick them off.
5703 spa_async_dispatch(spa
);
5707 * Sync all pools. We don't want to hold the namespace lock across these
5708 * operations, so we take a reference on the spa_t and drop the lock during the
5712 spa_sync_allpools(void)
5715 mutex_enter(&spa_namespace_lock
);
5716 while ((spa
= spa_next(spa
)) != NULL
) {
5717 if (spa_state(spa
) != POOL_STATE_ACTIVE
||
5718 !spa_writeable(spa
) || spa_suspended(spa
))
5720 spa_open_ref(spa
, FTAG
);
5721 mutex_exit(&spa_namespace_lock
);
5722 txg_wait_synced(spa_get_dsl(spa
), 0);
5723 mutex_enter(&spa_namespace_lock
);
5724 spa_close(spa
, FTAG
);
5726 mutex_exit(&spa_namespace_lock
);
5730 * ==========================================================================
5731 * Miscellaneous routines
5732 * ==========================================================================
5736 * Remove all pools in the system.
5744 * Remove all cached state. All pools should be closed now,
5745 * so every spa in the AVL tree should be unreferenced.
5747 mutex_enter(&spa_namespace_lock
);
5748 while ((spa
= spa_next(NULL
)) != NULL
) {
5750 * Stop async tasks. The async thread may need to detach
5751 * a device that's been replaced, which requires grabbing
5752 * spa_namespace_lock, so we must drop it here.
5754 spa_open_ref(spa
, FTAG
);
5755 mutex_exit(&spa_namespace_lock
);
5756 spa_async_suspend(spa
);
5757 mutex_enter(&spa_namespace_lock
);
5758 spa_close(spa
, FTAG
);
5760 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
5762 spa_deactivate(spa
);
5766 mutex_exit(&spa_namespace_lock
);
5770 spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
, boolean_t aux
)
5775 if ((vd
= vdev_lookup_by_guid(spa
->spa_root_vdev
, guid
)) != NULL
)
5779 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
5780 vd
= spa
->spa_l2cache
.sav_vdevs
[i
];
5781 if (vd
->vdev_guid
== guid
)
5785 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
5786 vd
= spa
->spa_spares
.sav_vdevs
[i
];
5787 if (vd
->vdev_guid
== guid
)
5796 spa_upgrade(spa_t
*spa
, uint64_t version
)
5798 ASSERT(spa_writeable(spa
));
5800 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5803 * This should only be called for a non-faulted pool, and since a
5804 * future version would result in an unopenable pool, this shouldn't be
5807 ASSERT(spa
->spa_uberblock
.ub_version
<= SPA_VERSION
);
5808 ASSERT(version
>= spa
->spa_uberblock
.ub_version
);
5810 spa
->spa_uberblock
.ub_version
= version
;
5811 vdev_config_dirty(spa
->spa_root_vdev
);
5813 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5815 txg_wait_synced(spa_get_dsl(spa
), 0);
5819 spa_has_spare(spa_t
*spa
, uint64_t guid
)
5823 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
5825 for (i
= 0; i
< sav
->sav_count
; i
++)
5826 if (sav
->sav_vdevs
[i
]->vdev_guid
== guid
)
5829 for (i
= 0; i
< sav
->sav_npending
; i
++) {
5830 if (nvlist_lookup_uint64(sav
->sav_pending
[i
], ZPOOL_CONFIG_GUID
,
5831 &spareguid
) == 0 && spareguid
== guid
)
5839 * Check if a pool has an active shared spare device.
5840 * Note: reference count of an active spare is 2, as a spare and as a replace
5843 spa_has_active_shared_spare(spa_t
*spa
)
5847 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
5849 for (i
= 0; i
< sav
->sav_count
; i
++) {
5850 if (spa_spare_exists(sav
->sav_vdevs
[i
]->vdev_guid
, &pool
,
5851 &refcnt
) && pool
!= 0ULL && pool
== spa_guid(spa
) &&
5860 * Post a sysevent corresponding to the given event. The 'name' must be one of
5861 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
5862 * filled in from the spa and (optionally) the vdev. This doesn't do anything
5863 * in the userland libzpool, as we don't want consumers to misinterpret ztest
5864 * or zdb as real changes.
5867 spa_event_notify(spa_t
*spa
, vdev_t
*vd
, const char *name
)
5871 sysevent_attr_list_t
*attr
= NULL
;
5872 sysevent_value_t value
;
5875 ev
= sysevent_alloc(EC_ZFS
, (char *)name
, SUNW_KERN_PUB
"zfs",
5878 value
.value_type
= SE_DATA_TYPE_STRING
;
5879 value
.value
.sv_string
= spa_name(spa
);
5880 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_NAME
, &value
, SE_SLEEP
) != 0)
5883 value
.value_type
= SE_DATA_TYPE_UINT64
;
5884 value
.value
.sv_uint64
= spa_guid(spa
);
5885 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_GUID
, &value
, SE_SLEEP
) != 0)
5889 value
.value_type
= SE_DATA_TYPE_UINT64
;
5890 value
.value
.sv_uint64
= vd
->vdev_guid
;
5891 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_GUID
, &value
,
5895 if (vd
->vdev_path
) {
5896 value
.value_type
= SE_DATA_TYPE_STRING
;
5897 value
.value
.sv_string
= vd
->vdev_path
;
5898 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_PATH
,
5899 &value
, SE_SLEEP
) != 0)
5904 if (sysevent_attach_attributes(ev
, attr
) != 0)
5908 (void) log_sysevent(ev
, SE_SLEEP
, &eid
);
5912 sysevent_free_attr(attr
);