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
)
480 if (!error
&& reset_bootfs
) {
481 error
= nvlist_remove(props
,
482 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), DATA_TYPE_STRING
);
485 error
= nvlist_add_uint64(props
,
486 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), objnum
);
494 spa_configfile_set(spa_t
*spa
, nvlist_t
*nvp
, boolean_t need_sync
)
497 spa_config_dirent_t
*dp
;
499 if (nvlist_lookup_string(nvp
, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE
),
503 dp
= kmem_alloc(sizeof (spa_config_dirent_t
),
506 if (cachefile
[0] == '\0')
507 dp
->scd_path
= spa_strdup(spa_config_path
);
508 else if (strcmp(cachefile
, "none") == 0)
511 dp
->scd_path
= spa_strdup(cachefile
);
513 list_insert_head(&spa
->spa_config_list
, dp
);
515 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
519 spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
)
523 boolean_t need_sync
= B_FALSE
;
526 if ((error
= spa_prop_validate(spa
, nvp
)) != 0)
530 while ((elem
= nvlist_next_nvpair(nvp
, elem
)) != NULL
) {
531 if ((prop
= zpool_name_to_prop(
532 nvpair_name(elem
))) == ZPROP_INVAL
)
535 if (prop
== ZPOOL_PROP_CACHEFILE
||
536 prop
== ZPOOL_PROP_ALTROOT
||
537 prop
== ZPOOL_PROP_READONLY
)
545 return (dsl_sync_task_do(spa_get_dsl(spa
), NULL
, spa_sync_props
,
552 * If the bootfs property value is dsobj, clear it.
555 spa_prop_clear_bootfs(spa_t
*spa
, uint64_t dsobj
, dmu_tx_t
*tx
)
557 if (spa
->spa_bootfs
== dsobj
&& spa
->spa_pool_props_object
!= 0) {
558 VERIFY(zap_remove(spa
->spa_meta_objset
,
559 spa
->spa_pool_props_object
,
560 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), tx
) == 0);
566 * ==========================================================================
567 * SPA state manipulation (open/create/destroy/import/export)
568 * ==========================================================================
572 spa_error_entry_compare(const void *a
, const void *b
)
574 spa_error_entry_t
*sa
= (spa_error_entry_t
*)a
;
575 spa_error_entry_t
*sb
= (spa_error_entry_t
*)b
;
578 ret
= bcmp(&sa
->se_bookmark
, &sb
->se_bookmark
,
579 sizeof (zbookmark_t
));
590 * Utility function which retrieves copies of the current logs and
591 * re-initializes them in the process.
594 spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
)
596 ASSERT(MUTEX_HELD(&spa
->spa_errlist_lock
));
598 bcopy(&spa
->spa_errlist_last
, last
, sizeof (avl_tree_t
));
599 bcopy(&spa
->spa_errlist_scrub
, scrub
, sizeof (avl_tree_t
));
601 avl_create(&spa
->spa_errlist_scrub
,
602 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
603 offsetof(spa_error_entry_t
, se_avl
));
604 avl_create(&spa
->spa_errlist_last
,
605 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
606 offsetof(spa_error_entry_t
, se_avl
));
610 spa_taskq_create(spa_t
*spa
, const char *name
, enum zti_modes mode
,
613 uint_t flags
= TASKQ_PREPOPULATE
;
614 boolean_t batch
= B_FALSE
;
618 return (NULL
); /* no taskq needed */
621 ASSERT3U(value
, >=, 1);
622 value
= MAX(value
, 1);
627 flags
|= TASKQ_THREADS_CPU_PCT
;
628 value
= zio_taskq_batch_pct
;
631 case zti_mode_online_percent
:
632 flags
|= TASKQ_THREADS_CPU_PCT
;
636 panic("unrecognized mode for %s taskq (%u:%u) in "
642 if (zio_taskq_sysdc
&& spa
->spa_proc
!= &p0
) {
644 flags
|= TASKQ_DC_BATCH
;
646 return (taskq_create_sysdc(name
, value
, 50, INT_MAX
,
647 spa
->spa_proc
, zio_taskq_basedc
, flags
));
649 return (taskq_create_proc(name
, value
, maxclsyspri
, 50, INT_MAX
,
650 spa
->spa_proc
, flags
));
654 spa_create_zio_taskqs(spa_t
*spa
)
656 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
657 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
658 const zio_taskq_info_t
*ztip
= &zio_taskqs
[t
][q
];
659 enum zti_modes mode
= ztip
->zti_mode
;
660 uint_t value
= ztip
->zti_value
;
663 (void) snprintf(name
, sizeof (name
),
664 "%s_%s", zio_type_name
[t
], zio_taskq_types
[q
]);
666 spa
->spa_zio_taskq
[t
][q
] =
667 spa_taskq_create(spa
, name
, mode
, value
);
674 spa_thread(void *arg
)
679 user_t
*pu
= PTOU(curproc
);
681 CALLB_CPR_INIT(&cprinfo
, &spa
->spa_proc_lock
, callb_generic_cpr
,
684 ASSERT(curproc
!= &p0
);
685 (void) snprintf(pu
->u_psargs
, sizeof (pu
->u_psargs
),
686 "zpool-%s", spa
->spa_name
);
687 (void) strlcpy(pu
->u_comm
, pu
->u_psargs
, sizeof (pu
->u_comm
));
689 /* bind this thread to the requested psrset */
690 if (zio_taskq_psrset_bind
!= PS_NONE
) {
692 mutex_enter(&cpu_lock
);
693 mutex_enter(&pidlock
);
694 mutex_enter(&curproc
->p_lock
);
696 if (cpupart_bind_thread(curthread
, zio_taskq_psrset_bind
,
697 0, NULL
, NULL
) == 0) {
698 curthread
->t_bind_pset
= zio_taskq_psrset_bind
;
701 "Couldn't bind process for zfs pool \"%s\" to "
702 "pset %d\n", spa
->spa_name
, zio_taskq_psrset_bind
);
705 mutex_exit(&curproc
->p_lock
);
706 mutex_exit(&pidlock
);
707 mutex_exit(&cpu_lock
);
711 if (zio_taskq_sysdc
) {
712 sysdc_thread_enter(curthread
, 100, 0);
715 spa
->spa_proc
= curproc
;
716 spa
->spa_did
= curthread
->t_did
;
718 spa_create_zio_taskqs(spa
);
720 mutex_enter(&spa
->spa_proc_lock
);
721 ASSERT(spa
->spa_proc_state
== SPA_PROC_CREATED
);
723 spa
->spa_proc_state
= SPA_PROC_ACTIVE
;
724 cv_broadcast(&spa
->spa_proc_cv
);
726 CALLB_CPR_SAFE_BEGIN(&cprinfo
);
727 while (spa
->spa_proc_state
== SPA_PROC_ACTIVE
)
728 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
729 CALLB_CPR_SAFE_END(&cprinfo
, &spa
->spa_proc_lock
);
731 ASSERT(spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
);
732 spa
->spa_proc_state
= SPA_PROC_GONE
;
734 cv_broadcast(&spa
->spa_proc_cv
);
735 CALLB_CPR_EXIT(&cprinfo
); /* drops spa_proc_lock */
737 mutex_enter(&curproc
->p_lock
);
743 * Activate an uninitialized pool.
746 spa_activate(spa_t
*spa
, int mode
)
748 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
750 spa
->spa_state
= POOL_STATE_ACTIVE
;
751 spa
->spa_mode
= mode
;
753 spa
->spa_normal_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
754 spa
->spa_log_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
756 /* Try to create a covering process */
757 mutex_enter(&spa
->spa_proc_lock
);
758 ASSERT(spa
->spa_proc_state
== SPA_PROC_NONE
);
759 ASSERT(spa
->spa_proc
== &p0
);
762 /* Only create a process if we're going to be around a while. */
763 if (spa_create_process
&& strcmp(spa
->spa_name
, TRYIMPORT_NAME
) != 0) {
764 if (newproc(spa_thread
, (caddr_t
)spa
, syscid
, maxclsyspri
,
766 spa
->spa_proc_state
= SPA_PROC_CREATED
;
767 while (spa
->spa_proc_state
== SPA_PROC_CREATED
) {
768 cv_wait(&spa
->spa_proc_cv
,
769 &spa
->spa_proc_lock
);
771 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
772 ASSERT(spa
->spa_proc
!= &p0
);
773 ASSERT(spa
->spa_did
!= 0);
777 "Couldn't create process for zfs pool \"%s\"\n",
782 mutex_exit(&spa
->spa_proc_lock
);
784 /* If we didn't create a process, we need to create our taskqs. */
785 if (spa
->spa_proc
== &p0
) {
786 spa_create_zio_taskqs(spa
);
789 list_create(&spa
->spa_config_dirty_list
, sizeof (vdev_t
),
790 offsetof(vdev_t
, vdev_config_dirty_node
));
791 list_create(&spa
->spa_state_dirty_list
, sizeof (vdev_t
),
792 offsetof(vdev_t
, vdev_state_dirty_node
));
794 txg_list_create(&spa
->spa_vdev_txg_list
,
795 offsetof(struct vdev
, vdev_txg_node
));
797 avl_create(&spa
->spa_errlist_scrub
,
798 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
799 offsetof(spa_error_entry_t
, se_avl
));
800 avl_create(&spa
->spa_errlist_last
,
801 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
802 offsetof(spa_error_entry_t
, se_avl
));
806 * Opposite of spa_activate().
809 spa_deactivate(spa_t
*spa
)
811 ASSERT(spa
->spa_sync_on
== B_FALSE
);
812 ASSERT(spa
->spa_dsl_pool
== NULL
);
813 ASSERT(spa
->spa_root_vdev
== NULL
);
814 ASSERT(spa
->spa_async_zio_root
== NULL
);
815 ASSERT(spa
->spa_state
!= POOL_STATE_UNINITIALIZED
);
817 txg_list_destroy(&spa
->spa_vdev_txg_list
);
819 list_destroy(&spa
->spa_config_dirty_list
);
820 list_destroy(&spa
->spa_state_dirty_list
);
822 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
823 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
824 if (spa
->spa_zio_taskq
[t
][q
] != NULL
)
825 taskq_destroy(spa
->spa_zio_taskq
[t
][q
]);
826 spa
->spa_zio_taskq
[t
][q
] = NULL
;
830 metaslab_class_destroy(spa
->spa_normal_class
);
831 spa
->spa_normal_class
= NULL
;
833 metaslab_class_destroy(spa
->spa_log_class
);
834 spa
->spa_log_class
= NULL
;
837 * If this was part of an import or the open otherwise failed, we may
838 * still have errors left in the queues. Empty them just in case.
840 spa_errlog_drain(spa
);
842 avl_destroy(&spa
->spa_errlist_scrub
);
843 avl_destroy(&spa
->spa_errlist_last
);
845 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
847 mutex_enter(&spa
->spa_proc_lock
);
848 if (spa
->spa_proc_state
!= SPA_PROC_NONE
) {
849 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
850 spa
->spa_proc_state
= SPA_PROC_DEACTIVATE
;
851 cv_broadcast(&spa
->spa_proc_cv
);
852 while (spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
) {
853 ASSERT(spa
->spa_proc
!= &p0
);
854 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
856 ASSERT(spa
->spa_proc_state
== SPA_PROC_GONE
);
857 spa
->spa_proc_state
= SPA_PROC_NONE
;
859 ASSERT(spa
->spa_proc
== &p0
);
860 mutex_exit(&spa
->spa_proc_lock
);
863 * We want to make sure spa_thread() has actually exited the ZFS
864 * module, so that the module can't be unloaded out from underneath
867 if (spa
->spa_did
!= 0) {
868 thread_join(spa
->spa_did
);
874 * Verify a pool configuration, and construct the vdev tree appropriately. This
875 * will create all the necessary vdevs in the appropriate layout, with each vdev
876 * in the CLOSED state. This will prep the pool before open/creation/import.
877 * All vdev validation is done by the vdev_alloc() routine.
880 spa_config_parse(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
,
881 uint_t id
, int atype
)
887 if ((error
= vdev_alloc(spa
, vdp
, nv
, parent
, id
, atype
)) != 0)
890 if ((*vdp
)->vdev_ops
->vdev_op_leaf
)
893 error
= nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
905 for (int c
= 0; c
< children
; c
++) {
907 if ((error
= spa_config_parse(spa
, &vd
, child
[c
], *vdp
, c
,
915 ASSERT(*vdp
!= NULL
);
921 * Opposite of spa_load().
924 spa_unload(spa_t
*spa
)
928 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
933 spa_async_suspend(spa
);
938 if (spa
->spa_sync_on
) {
939 txg_sync_stop(spa
->spa_dsl_pool
);
940 spa
->spa_sync_on
= B_FALSE
;
944 * Wait for any outstanding async I/O to complete.
946 if (spa
->spa_async_zio_root
!= NULL
) {
947 (void) zio_wait(spa
->spa_async_zio_root
);
948 spa
->spa_async_zio_root
= NULL
;
951 bpobj_close(&spa
->spa_deferred_bpobj
);
954 * Close the dsl pool.
956 if (spa
->spa_dsl_pool
) {
957 dsl_pool_close(spa
->spa_dsl_pool
);
958 spa
->spa_dsl_pool
= NULL
;
959 spa
->spa_meta_objset
= NULL
;
964 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
967 * Drop and purge level 2 cache
969 spa_l2cache_drop(spa
);
974 if (spa
->spa_root_vdev
)
975 vdev_free(spa
->spa_root_vdev
);
976 ASSERT(spa
->spa_root_vdev
== NULL
);
978 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
979 vdev_free(spa
->spa_spares
.sav_vdevs
[i
]);
980 if (spa
->spa_spares
.sav_vdevs
) {
981 kmem_free(spa
->spa_spares
.sav_vdevs
,
982 spa
->spa_spares
.sav_count
* sizeof (void *));
983 spa
->spa_spares
.sav_vdevs
= NULL
;
985 if (spa
->spa_spares
.sav_config
) {
986 nvlist_free(spa
->spa_spares
.sav_config
);
987 spa
->spa_spares
.sav_config
= NULL
;
989 spa
->spa_spares
.sav_count
= 0;
991 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
992 vdev_free(spa
->spa_l2cache
.sav_vdevs
[i
]);
993 if (spa
->spa_l2cache
.sav_vdevs
) {
994 kmem_free(spa
->spa_l2cache
.sav_vdevs
,
995 spa
->spa_l2cache
.sav_count
* sizeof (void *));
996 spa
->spa_l2cache
.sav_vdevs
= NULL
;
998 if (spa
->spa_l2cache
.sav_config
) {
999 nvlist_free(spa
->spa_l2cache
.sav_config
);
1000 spa
->spa_l2cache
.sav_config
= NULL
;
1002 spa
->spa_l2cache
.sav_count
= 0;
1004 spa
->spa_async_suspended
= 0;
1006 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1010 * Load (or re-load) the current list of vdevs describing the active spares for
1011 * this pool. When this is called, we have some form of basic information in
1012 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1013 * then re-generate a more complete list including status information.
1016 spa_load_spares(spa_t
*spa
)
1023 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1026 * First, close and free any existing spare vdevs.
1028 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1029 vd
= spa
->spa_spares
.sav_vdevs
[i
];
1031 /* Undo the call to spa_activate() below */
1032 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1033 B_FALSE
)) != NULL
&& tvd
->vdev_isspare
)
1034 spa_spare_remove(tvd
);
1039 if (spa
->spa_spares
.sav_vdevs
)
1040 kmem_free(spa
->spa_spares
.sav_vdevs
,
1041 spa
->spa_spares
.sav_count
* sizeof (void *));
1043 if (spa
->spa_spares
.sav_config
== NULL
)
1046 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
1047 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
1049 spa
->spa_spares
.sav_count
= (int)nspares
;
1050 spa
->spa_spares
.sav_vdevs
= NULL
;
1056 * Construct the array of vdevs, opening them to get status in the
1057 * process. For each spare, there is potentially two different vdev_t
1058 * structures associated with it: one in the list of spares (used only
1059 * for basic validation purposes) and one in the active vdev
1060 * configuration (if it's spared in). During this phase we open and
1061 * validate each vdev on the spare list. If the vdev also exists in the
1062 * active configuration, then we also mark this vdev as an active spare.
1064 spa
->spa_spares
.sav_vdevs
= kmem_alloc(nspares
* sizeof (void *),
1066 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1067 VERIFY(spa_config_parse(spa
, &vd
, spares
[i
], NULL
, 0,
1068 VDEV_ALLOC_SPARE
) == 0);
1071 spa
->spa_spares
.sav_vdevs
[i
] = vd
;
1073 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1074 B_FALSE
)) != NULL
) {
1075 if (!tvd
->vdev_isspare
)
1079 * We only mark the spare active if we were successfully
1080 * able to load the vdev. Otherwise, importing a pool
1081 * with a bad active spare would result in strange
1082 * behavior, because multiple pool would think the spare
1083 * is actively in use.
1085 * There is a vulnerability here to an equally bizarre
1086 * circumstance, where a dead active spare is later
1087 * brought back to life (onlined or otherwise). Given
1088 * the rarity of this scenario, and the extra complexity
1089 * it adds, we ignore the possibility.
1091 if (!vdev_is_dead(tvd
))
1092 spa_spare_activate(tvd
);
1096 vd
->vdev_aux
= &spa
->spa_spares
;
1098 if (vdev_open(vd
) != 0)
1101 if (vdev_validate_aux(vd
) == 0)
1106 * Recompute the stashed list of spares, with status information
1109 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
, ZPOOL_CONFIG_SPARES
,
1110 DATA_TYPE_NVLIST_ARRAY
) == 0);
1112 spares
= kmem_alloc(spa
->spa_spares
.sav_count
* sizeof (void *),
1114 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1115 spares
[i
] = vdev_config_generate(spa
,
1116 spa
->spa_spares
.sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_SPARE
);
1117 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
1118 ZPOOL_CONFIG_SPARES
, spares
, spa
->spa_spares
.sav_count
) == 0);
1119 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1120 nvlist_free(spares
[i
]);
1121 kmem_free(spares
, spa
->spa_spares
.sav_count
* sizeof (void *));
1125 * Load (or re-load) the current list of vdevs describing the active l2cache for
1126 * this pool. When this is called, we have some form of basic information in
1127 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1128 * then re-generate a more complete list including status information.
1129 * Devices which are already active have their details maintained, and are
1133 spa_load_l2cache(spa_t
*spa
)
1137 int i
, j
, oldnvdevs
;
1139 vdev_t
*vd
, **oldvdevs
, **newvdevs
;
1140 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
1142 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1144 if (sav
->sav_config
!= NULL
) {
1145 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
1146 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
1147 newvdevs
= kmem_alloc(nl2cache
* sizeof (void *), KM_SLEEP
);
1152 oldvdevs
= sav
->sav_vdevs
;
1153 oldnvdevs
= sav
->sav_count
;
1154 sav
->sav_vdevs
= NULL
;
1158 * Process new nvlist of vdevs.
1160 for (i
= 0; i
< nl2cache
; i
++) {
1161 VERIFY(nvlist_lookup_uint64(l2cache
[i
], ZPOOL_CONFIG_GUID
,
1165 for (j
= 0; j
< oldnvdevs
; j
++) {
1167 if (vd
!= NULL
&& guid
== vd
->vdev_guid
) {
1169 * Retain previous vdev for add/remove ops.
1177 if (newvdevs
[i
] == NULL
) {
1181 VERIFY(spa_config_parse(spa
, &vd
, l2cache
[i
], NULL
, 0,
1182 VDEV_ALLOC_L2CACHE
) == 0);
1187 * Commit this vdev as an l2cache device,
1188 * even if it fails to open.
1190 spa_l2cache_add(vd
);
1195 spa_l2cache_activate(vd
);
1197 if (vdev_open(vd
) != 0)
1200 (void) vdev_validate_aux(vd
);
1202 if (!vdev_is_dead(vd
))
1203 l2arc_add_vdev(spa
, vd
);
1208 * Purge vdevs that were dropped
1210 for (i
= 0; i
< oldnvdevs
; i
++) {
1215 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
1216 pool
!= 0ULL && l2arc_vdev_present(vd
))
1217 l2arc_remove_vdev(vd
);
1218 (void) vdev_close(vd
);
1219 spa_l2cache_remove(vd
);
1224 kmem_free(oldvdevs
, oldnvdevs
* sizeof (void *));
1226 if (sav
->sav_config
== NULL
)
1229 sav
->sav_vdevs
= newvdevs
;
1230 sav
->sav_count
= (int)nl2cache
;
1233 * Recompute the stashed list of l2cache devices, with status
1234 * information this time.
1236 VERIFY(nvlist_remove(sav
->sav_config
, ZPOOL_CONFIG_L2CACHE
,
1237 DATA_TYPE_NVLIST_ARRAY
) == 0);
1239 l2cache
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
1240 for (i
= 0; i
< sav
->sav_count
; i
++)
1241 l2cache
[i
] = vdev_config_generate(spa
,
1242 sav
->sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_L2CACHE
);
1243 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
1244 ZPOOL_CONFIG_L2CACHE
, l2cache
, sav
->sav_count
) == 0);
1246 for (i
= 0; i
< sav
->sav_count
; i
++)
1247 nvlist_free(l2cache
[i
]);
1249 kmem_free(l2cache
, sav
->sav_count
* sizeof (void *));
1253 load_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
**value
)
1256 char *packed
= NULL
;
1261 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
1262 nvsize
= *(uint64_t *)db
->db_data
;
1263 dmu_buf_rele(db
, FTAG
);
1265 packed
= kmem_alloc(nvsize
, KM_SLEEP
);
1266 error
= dmu_read(spa
->spa_meta_objset
, obj
, 0, nvsize
, packed
,
1269 error
= nvlist_unpack(packed
, nvsize
, value
, 0);
1270 kmem_free(packed
, nvsize
);
1276 * Checks to see if the given vdev could not be opened, in which case we post a
1277 * sysevent to notify the autoreplace code that the device has been removed.
1280 spa_check_removed(vdev_t
*vd
)
1282 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1283 spa_check_removed(vd
->vdev_child
[c
]);
1285 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_is_dead(vd
)) {
1286 zfs_post_autoreplace(vd
->vdev_spa
, vd
);
1287 spa_event_notify(vd
->vdev_spa
, vd
, ESC_ZFS_VDEV_CHECK
);
1292 * Validate the current config against the MOS config
1295 spa_config_valid(spa_t
*spa
, nvlist_t
*config
)
1297 vdev_t
*mrvd
, *rvd
= spa
->spa_root_vdev
;
1300 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nv
) == 0);
1302 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1303 VERIFY(spa_config_parse(spa
, &mrvd
, nv
, NULL
, 0, VDEV_ALLOC_LOAD
) == 0);
1305 ASSERT3U(rvd
->vdev_children
, ==, mrvd
->vdev_children
);
1308 * If we're doing a normal import, then build up any additional
1309 * diagnostic information about missing devices in this config.
1310 * We'll pass this up to the user for further processing.
1312 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
)) {
1313 nvlist_t
**child
, *nv
;
1316 child
= kmem_alloc(rvd
->vdev_children
* sizeof (nvlist_t
**),
1318 VERIFY(nvlist_alloc(&nv
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
1320 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1321 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1322 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1324 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1325 mtvd
->vdev_ops
!= &vdev_missing_ops
&&
1327 child
[idx
++] = vdev_config_generate(spa
, mtvd
,
1332 VERIFY(nvlist_add_nvlist_array(nv
,
1333 ZPOOL_CONFIG_CHILDREN
, child
, idx
) == 0);
1334 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
1335 ZPOOL_CONFIG_MISSING_DEVICES
, nv
) == 0);
1337 for (int i
= 0; i
< idx
; i
++)
1338 nvlist_free(child
[i
]);
1341 kmem_free(child
, rvd
->vdev_children
* sizeof (char **));
1345 * Compare the root vdev tree with the information we have
1346 * from the MOS config (mrvd). Check each top-level vdev
1347 * with the corresponding MOS config top-level (mtvd).
1349 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1350 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1351 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1354 * Resolve any "missing" vdevs in the current configuration.
1355 * If we find that the MOS config has more accurate information
1356 * about the top-level vdev then use that vdev instead.
1358 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1359 mtvd
->vdev_ops
!= &vdev_missing_ops
) {
1361 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
))
1365 * Device specific actions.
1367 if (mtvd
->vdev_islog
) {
1368 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
1371 * XXX - once we have 'readonly' pool
1372 * support we should be able to handle
1373 * missing data devices by transitioning
1374 * the pool to readonly.
1380 * Swap the missing vdev with the data we were
1381 * able to obtain from the MOS config.
1383 vdev_remove_child(rvd
, tvd
);
1384 vdev_remove_child(mrvd
, mtvd
);
1386 vdev_add_child(rvd
, mtvd
);
1387 vdev_add_child(mrvd
, tvd
);
1389 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1391 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1394 } else if (mtvd
->vdev_islog
) {
1396 * Load the slog device's state from the MOS config
1397 * since it's possible that the label does not
1398 * contain the most up-to-date information.
1400 vdev_load_log_state(tvd
, mtvd
);
1405 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1408 * Ensure we were able to validate the config.
1410 return (rvd
->vdev_guid_sum
== spa
->spa_uberblock
.ub_guid_sum
);
1414 * Check for missing log devices
1417 spa_check_logs(spa_t
*spa
)
1419 switch (spa
->spa_log_state
) {
1420 case SPA_LOG_MISSING
:
1421 /* need to recheck in case slog has been restored */
1422 case SPA_LOG_UNKNOWN
:
1423 if (dmu_objset_find(spa
->spa_name
, zil_check_log_chain
, NULL
,
1424 DS_FIND_CHILDREN
)) {
1425 spa_set_log_state(spa
, SPA_LOG_MISSING
);
1434 spa_passivate_log(spa_t
*spa
)
1436 vdev_t
*rvd
= spa
->spa_root_vdev
;
1437 boolean_t slog_found
= B_FALSE
;
1439 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1441 if (!spa_has_slogs(spa
))
1444 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1445 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1446 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1448 if (tvd
->vdev_islog
) {
1449 metaslab_group_passivate(mg
);
1450 slog_found
= B_TRUE
;
1454 return (slog_found
);
1458 spa_activate_log(spa_t
*spa
)
1460 vdev_t
*rvd
= spa
->spa_root_vdev
;
1462 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1464 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1465 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1466 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1468 if (tvd
->vdev_islog
)
1469 metaslab_group_activate(mg
);
1474 spa_offline_log(spa_t
*spa
)
1478 if ((error
= dmu_objset_find(spa_name(spa
), zil_vdev_offline
,
1479 NULL
, DS_FIND_CHILDREN
)) == 0) {
1482 * We successfully offlined the log device, sync out the
1483 * current txg so that the "stubby" block can be removed
1486 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1492 spa_aux_check_removed(spa_aux_vdev_t
*sav
)
1494 for (int i
= 0; i
< sav
->sav_count
; i
++)
1495 spa_check_removed(sav
->sav_vdevs
[i
]);
1499 spa_claim_notify(zio_t
*zio
)
1501 spa_t
*spa
= zio
->io_spa
;
1506 mutex_enter(&spa
->spa_props_lock
); /* any mutex will do */
1507 if (spa
->spa_claim_max_txg
< zio
->io_bp
->blk_birth
)
1508 spa
->spa_claim_max_txg
= zio
->io_bp
->blk_birth
;
1509 mutex_exit(&spa
->spa_props_lock
);
1512 typedef struct spa_load_error
{
1513 uint64_t sle_meta_count
;
1514 uint64_t sle_data_count
;
1518 spa_load_verify_done(zio_t
*zio
)
1520 blkptr_t
*bp
= zio
->io_bp
;
1521 spa_load_error_t
*sle
= zio
->io_private
;
1522 dmu_object_type_t type
= BP_GET_TYPE(bp
);
1523 int error
= zio
->io_error
;
1526 if ((BP_GET_LEVEL(bp
) != 0 || dmu_ot
[type
].ot_metadata
) &&
1527 type
!= DMU_OT_INTENT_LOG
)
1528 atomic_add_64(&sle
->sle_meta_count
, 1);
1530 atomic_add_64(&sle
->sle_data_count
, 1);
1532 zio_data_buf_free(zio
->io_data
, zio
->io_size
);
1537 spa_load_verify_cb(spa_t
*spa
, zilog_t
*zilog
, const blkptr_t
*bp
,
1538 arc_buf_t
*pbuf
, const zbookmark_t
*zb
, const dnode_phys_t
*dnp
, void *arg
)
1542 size_t size
= BP_GET_PSIZE(bp
);
1543 void *data
= zio_data_buf_alloc(size
);
1545 zio_nowait(zio_read(rio
, spa
, bp
, data
, size
,
1546 spa_load_verify_done
, rio
->io_private
, ZIO_PRIORITY_SCRUB
,
1547 ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_CANFAIL
|
1548 ZIO_FLAG_SCRUB
| ZIO_FLAG_RAW
, zb
));
1554 spa_load_verify(spa_t
*spa
)
1557 spa_load_error_t sle
= { 0 };
1558 zpool_rewind_policy_t policy
;
1559 boolean_t verify_ok
= B_FALSE
;
1562 zpool_get_rewind_policy(spa
->spa_config
, &policy
);
1564 if (policy
.zrp_request
& ZPOOL_NEVER_REWIND
)
1567 rio
= zio_root(spa
, NULL
, &sle
,
1568 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
);
1570 error
= traverse_pool(spa
, spa
->spa_verify_min_txg
,
1571 TRAVERSE_PRE
| TRAVERSE_PREFETCH
, spa_load_verify_cb
, rio
);
1573 (void) zio_wait(rio
);
1575 spa
->spa_load_meta_errors
= sle
.sle_meta_count
;
1576 spa
->spa_load_data_errors
= sle
.sle_data_count
;
1578 if (!error
&& sle
.sle_meta_count
<= policy
.zrp_maxmeta
&&
1579 sle
.sle_data_count
<= policy
.zrp_maxdata
) {
1583 spa
->spa_load_txg
= spa
->spa_uberblock
.ub_txg
;
1584 spa
->spa_load_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
1586 loss
= spa
->spa_last_ubsync_txg_ts
- spa
->spa_load_txg_ts
;
1587 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1588 ZPOOL_CONFIG_LOAD_TIME
, spa
->spa_load_txg_ts
) == 0);
1589 VERIFY(nvlist_add_int64(spa
->spa_load_info
,
1590 ZPOOL_CONFIG_REWIND_TIME
, loss
) == 0);
1591 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1592 ZPOOL_CONFIG_LOAD_DATA_ERRORS
, sle
.sle_data_count
) == 0);
1594 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
;
1598 if (error
!= ENXIO
&& error
!= EIO
)
1603 return (verify_ok
? 0 : EIO
);
1607 * Find a value in the pool props object.
1610 spa_prop_find(spa_t
*spa
, zpool_prop_t prop
, uint64_t *val
)
1612 (void) zap_lookup(spa
->spa_meta_objset
, spa
->spa_pool_props_object
,
1613 zpool_prop_to_name(prop
), sizeof (uint64_t), 1, val
);
1617 * Find a value in the pool directory object.
1620 spa_dir_prop(spa_t
*spa
, const char *name
, uint64_t *val
)
1622 return (zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
1623 name
, sizeof (uint64_t), 1, val
));
1627 spa_vdev_err(vdev_t
*vdev
, vdev_aux_t aux
, int err
)
1629 vdev_set_state(vdev
, B_TRUE
, VDEV_STATE_CANT_OPEN
, aux
);
1634 * Fix up config after a partly-completed split. This is done with the
1635 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
1636 * pool have that entry in their config, but only the splitting one contains
1637 * a list of all the guids of the vdevs that are being split off.
1639 * This function determines what to do with that list: either rejoin
1640 * all the disks to the pool, or complete the splitting process. To attempt
1641 * the rejoin, each disk that is offlined is marked online again, and
1642 * we do a reopen() call. If the vdev label for every disk that was
1643 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
1644 * then we call vdev_split() on each disk, and complete the split.
1646 * Otherwise we leave the config alone, with all the vdevs in place in
1647 * the original pool.
1650 spa_try_repair(spa_t
*spa
, nvlist_t
*config
)
1657 boolean_t attempt_reopen
;
1659 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
, &nvl
) != 0)
1662 /* check that the config is complete */
1663 if (nvlist_lookup_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
1664 &glist
, &gcount
) != 0)
1667 vd
= kmem_zalloc(gcount
* sizeof (vdev_t
*), KM_SLEEP
);
1669 /* attempt to online all the vdevs & validate */
1670 attempt_reopen
= B_TRUE
;
1671 for (i
= 0; i
< gcount
; i
++) {
1672 if (glist
[i
] == 0) /* vdev is hole */
1675 vd
[i
] = spa_lookup_by_guid(spa
, glist
[i
], B_FALSE
);
1676 if (vd
[i
] == NULL
) {
1678 * Don't bother attempting to reopen the disks;
1679 * just do the split.
1681 attempt_reopen
= B_FALSE
;
1683 /* attempt to re-online it */
1684 vd
[i
]->vdev_offline
= B_FALSE
;
1688 if (attempt_reopen
) {
1689 vdev_reopen(spa
->spa_root_vdev
);
1691 /* check each device to see what state it's in */
1692 for (extracted
= 0, i
= 0; i
< gcount
; i
++) {
1693 if (vd
[i
] != NULL
&&
1694 vd
[i
]->vdev_stat
.vs_aux
!= VDEV_AUX_SPLIT_POOL
)
1701 * If every disk has been moved to the new pool, or if we never
1702 * even attempted to look at them, then we split them off for
1705 if (!attempt_reopen
|| gcount
== extracted
) {
1706 for (i
= 0; i
< gcount
; i
++)
1709 vdev_reopen(spa
->spa_root_vdev
);
1712 kmem_free(vd
, gcount
* sizeof (vdev_t
*));
1716 spa_load(spa_t
*spa
, spa_load_state_t state
, spa_import_type_t type
,
1717 boolean_t mosconfig
)
1719 nvlist_t
*config
= spa
->spa_config
;
1720 char *ereport
= FM_EREPORT_ZFS_POOL
;
1725 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
, &pool_guid
))
1729 * Versioning wasn't explicitly added to the label until later, so if
1730 * it's not present treat it as the initial version.
1732 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VERSION
,
1733 &spa
->spa_ubsync
.ub_version
) != 0)
1734 spa
->spa_ubsync
.ub_version
= SPA_VERSION_INITIAL
;
1736 (void) nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
1737 &spa
->spa_config_txg
);
1739 if ((state
== SPA_LOAD_IMPORT
|| state
== SPA_LOAD_TRYIMPORT
) &&
1740 spa_guid_exists(pool_guid
, 0)) {
1743 spa
->spa_load_guid
= pool_guid
;
1745 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
,
1747 VERIFY(nvlist_dup(nvl
, &spa
->spa_config_splitting
,
1751 gethrestime(&spa
->spa_loaded_ts
);
1752 error
= spa_load_impl(spa
, pool_guid
, config
, state
, type
,
1753 mosconfig
, &ereport
);
1756 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
1758 if (error
!= EEXIST
) {
1759 spa
->spa_loaded_ts
.tv_sec
= 0;
1760 spa
->spa_loaded_ts
.tv_nsec
= 0;
1762 if (error
!= EBADF
) {
1763 zfs_ereport_post(ereport
, spa
, NULL
, NULL
, 0, 0);
1766 spa
->spa_load_state
= error
? SPA_LOAD_ERROR
: SPA_LOAD_NONE
;
1773 * Load an existing storage pool, using the pool's builtin spa_config as a
1774 * source of configuration information.
1777 spa_load_impl(spa_t
*spa
, uint64_t pool_guid
, nvlist_t
*config
,
1778 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
1782 nvlist_t
*nvroot
= NULL
;
1784 uberblock_t
*ub
= &spa
->spa_uberblock
;
1785 uint64_t children
, config_cache_txg
= spa
->spa_config_txg
;
1786 int orig_mode
= spa
->spa_mode
;
1791 * If this is an untrusted config, access the pool in read-only mode.
1792 * This prevents things like resilvering recently removed devices.
1795 spa
->spa_mode
= FREAD
;
1797 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1799 spa
->spa_load_state
= state
;
1801 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvroot
))
1804 parse
= (type
== SPA_IMPORT_EXISTING
?
1805 VDEV_ALLOC_LOAD
: VDEV_ALLOC_SPLIT
);
1808 * Create "The Godfather" zio to hold all async IOs
1810 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
1811 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
1814 * Parse the configuration into a vdev tree. We explicitly set the
1815 * value that will be returned by spa_version() since parsing the
1816 * configuration requires knowing the version number.
1818 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1819 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, parse
);
1820 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1825 ASSERT(spa
->spa_root_vdev
== rvd
);
1827 if (type
!= SPA_IMPORT_ASSEMBLE
) {
1828 ASSERT(spa_guid(spa
) == pool_guid
);
1832 * Try to open all vdevs, loading each label in the process.
1834 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1835 error
= vdev_open(rvd
);
1836 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1841 * We need to validate the vdev labels against the configuration that
1842 * we have in hand, which is dependent on the setting of mosconfig. If
1843 * mosconfig is true then we're validating the vdev labels based on
1844 * that config. Otherwise, we're validating against the cached config
1845 * (zpool.cache) that was read when we loaded the zfs module, and then
1846 * later we will recursively call spa_load() and validate against
1849 * If we're assembling a new pool that's been split off from an
1850 * existing pool, the labels haven't yet been updated so we skip
1851 * validation for now.
1853 if (type
!= SPA_IMPORT_ASSEMBLE
) {
1854 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1855 error
= vdev_validate(rvd
);
1856 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1861 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
1866 * Find the best uberblock.
1868 vdev_uberblock_load(NULL
, rvd
, ub
);
1871 * If we weren't able to find a single valid uberblock, return failure.
1873 if (ub
->ub_txg
== 0)
1874 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, ENXIO
));
1877 * If the pool is newer than the code, we can't open it.
1879 if (ub
->ub_version
> SPA_VERSION
)
1880 return (spa_vdev_err(rvd
, VDEV_AUX_VERSION_NEWER
, ENOTSUP
));
1883 * If the vdev guid sum doesn't match the uberblock, we have an
1884 * incomplete configuration. We first check to see if the pool
1885 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
1886 * If it is, defer the vdev_guid_sum check till later so we
1887 * can handle missing vdevs.
1889 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VDEV_CHILDREN
,
1890 &children
) != 0 && mosconfig
&& type
!= SPA_IMPORT_ASSEMBLE
&&
1891 rvd
->vdev_guid_sum
!= ub
->ub_guid_sum
)
1892 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
, ENXIO
));
1894 if (type
!= SPA_IMPORT_ASSEMBLE
&& spa
->spa_config_splitting
) {
1895 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1896 spa_try_repair(spa
, config
);
1897 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1898 nvlist_free(spa
->spa_config_splitting
);
1899 spa
->spa_config_splitting
= NULL
;
1903 * Initialize internal SPA structures.
1905 spa
->spa_state
= POOL_STATE_ACTIVE
;
1906 spa
->spa_ubsync
= spa
->spa_uberblock
;
1907 spa
->spa_verify_min_txg
= spa
->spa_extreme_rewind
?
1908 TXG_INITIAL
- 1 : spa_last_synced_txg(spa
) - TXG_DEFER_SIZE
- 1;
1909 spa
->spa_first_txg
= spa
->spa_last_ubsync_txg
?
1910 spa
->spa_last_ubsync_txg
: spa_last_synced_txg(spa
) + 1;
1911 spa
->spa_claim_max_txg
= spa
->spa_first_txg
;
1912 spa
->spa_prev_software_version
= ub
->ub_software_version
;
1914 error
= dsl_pool_open(spa
, spa
->spa_first_txg
, &spa
->spa_dsl_pool
);
1916 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1917 spa
->spa_meta_objset
= spa
->spa_dsl_pool
->dp_meta_objset
;
1919 if (spa_dir_prop(spa
, DMU_POOL_CONFIG
, &spa
->spa_config_object
) != 0)
1920 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1924 nvlist_t
*policy
= NULL
, *nvconfig
;
1926 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
1927 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1929 if (!spa_is_root(spa
) && nvlist_lookup_uint64(nvconfig
,
1930 ZPOOL_CONFIG_HOSTID
, &hostid
) == 0) {
1932 unsigned long myhostid
= 0;
1934 VERIFY(nvlist_lookup_string(nvconfig
,
1935 ZPOOL_CONFIG_HOSTNAME
, &hostname
) == 0);
1938 myhostid
= zone_get_hostid(NULL
);
1941 * We're emulating the system's hostid in userland, so
1942 * we can't use zone_get_hostid().
1944 (void) ddi_strtoul(hw_serial
, NULL
, 10, &myhostid
);
1945 #endif /* _KERNEL */
1946 if (hostid
!= 0 && myhostid
!= 0 &&
1947 hostid
!= myhostid
) {
1948 nvlist_free(nvconfig
);
1949 cmn_err(CE_WARN
, "pool '%s' could not be "
1950 "loaded as it was last accessed by "
1951 "another system (host: %s hostid: 0x%lx). "
1952 "See: http://www.sun.com/msg/ZFS-8000-EY",
1953 spa_name(spa
), hostname
,
1954 (unsigned long)hostid
);
1958 if (nvlist_lookup_nvlist(spa
->spa_config
,
1959 ZPOOL_REWIND_POLICY
, &policy
) == 0)
1960 VERIFY(nvlist_add_nvlist(nvconfig
,
1961 ZPOOL_REWIND_POLICY
, policy
) == 0);
1963 spa_config_set(spa
, nvconfig
);
1965 spa_deactivate(spa
);
1966 spa_activate(spa
, orig_mode
);
1968 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, B_TRUE
));
1971 if (spa_dir_prop(spa
, DMU_POOL_SYNC_BPOBJ
, &obj
) != 0)
1972 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1973 error
= bpobj_open(&spa
->spa_deferred_bpobj
, spa
->spa_meta_objset
, obj
);
1975 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1978 * Load the bit that tells us to use the new accounting function
1979 * (raid-z deflation). If we have an older pool, this will not
1982 error
= spa_dir_prop(spa
, DMU_POOL_DEFLATE
, &spa
->spa_deflate
);
1983 if (error
!= 0 && error
!= ENOENT
)
1984 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1986 error
= spa_dir_prop(spa
, DMU_POOL_CREATION_VERSION
,
1987 &spa
->spa_creation_version
);
1988 if (error
!= 0 && error
!= ENOENT
)
1989 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1992 * Load the persistent error log. If we have an older pool, this will
1995 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_LAST
, &spa
->spa_errlog_last
);
1996 if (error
!= 0 && error
!= ENOENT
)
1997 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
1999 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_SCRUB
,
2000 &spa
->spa_errlog_scrub
);
2001 if (error
!= 0 && error
!= ENOENT
)
2002 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2005 * Load the history object. If we have an older pool, this
2006 * will not be present.
2008 error
= spa_dir_prop(spa
, DMU_POOL_HISTORY
, &spa
->spa_history
);
2009 if (error
!= 0 && error
!= ENOENT
)
2010 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2013 * If we're assembling the pool from the split-off vdevs of
2014 * an existing pool, we don't want to attach the spares & cache
2019 * Load any hot spares for this pool.
2021 error
= spa_dir_prop(spa
, DMU_POOL_SPARES
, &spa
->spa_spares
.sav_object
);
2022 if (error
!= 0 && error
!= ENOENT
)
2023 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2024 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2025 ASSERT(spa_version(spa
) >= SPA_VERSION_SPARES
);
2026 if (load_nvlist(spa
, spa
->spa_spares
.sav_object
,
2027 &spa
->spa_spares
.sav_config
) != 0)
2028 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2030 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2031 spa_load_spares(spa
);
2032 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2033 } else if (error
== 0) {
2034 spa
->spa_spares
.sav_sync
= B_TRUE
;
2038 * Load any level 2 ARC devices for this pool.
2040 error
= spa_dir_prop(spa
, DMU_POOL_L2CACHE
,
2041 &spa
->spa_l2cache
.sav_object
);
2042 if (error
!= 0 && error
!= ENOENT
)
2043 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2044 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2045 ASSERT(spa_version(spa
) >= SPA_VERSION_L2CACHE
);
2046 if (load_nvlist(spa
, spa
->spa_l2cache
.sav_object
,
2047 &spa
->spa_l2cache
.sav_config
) != 0)
2048 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2050 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2051 spa_load_l2cache(spa
);
2052 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2053 } else if (error
== 0) {
2054 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
2057 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
2059 error
= spa_dir_prop(spa
, DMU_POOL_PROPS
, &spa
->spa_pool_props_object
);
2060 if (error
&& error
!= ENOENT
)
2061 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2064 uint64_t autoreplace
;
2066 spa_prop_find(spa
, ZPOOL_PROP_BOOTFS
, &spa
->spa_bootfs
);
2067 spa_prop_find(spa
, ZPOOL_PROP_AUTOREPLACE
, &autoreplace
);
2068 spa_prop_find(spa
, ZPOOL_PROP_DELEGATION
, &spa
->spa_delegation
);
2069 spa_prop_find(spa
, ZPOOL_PROP_FAILUREMODE
, &spa
->spa_failmode
);
2070 spa_prop_find(spa
, ZPOOL_PROP_AUTOEXPAND
, &spa
->spa_autoexpand
);
2071 spa_prop_find(spa
, ZPOOL_PROP_DEDUPDITTO
,
2072 &spa
->spa_dedup_ditto
);
2074 spa
->spa_autoreplace
= (autoreplace
!= 0);
2078 * If the 'autoreplace' property is set, then post a resource notifying
2079 * the ZFS DE that it should not issue any faults for unopenable
2080 * devices. We also iterate over the vdevs, and post a sysevent for any
2081 * unopenable vdevs so that the normal autoreplace handler can take
2084 if (spa
->spa_autoreplace
&& state
!= SPA_LOAD_TRYIMPORT
) {
2085 spa_check_removed(spa
->spa_root_vdev
);
2087 * For the import case, this is done in spa_import(), because
2088 * at this point we're using the spare definitions from
2089 * the MOS config, not necessarily from the userland config.
2091 if (state
!= SPA_LOAD_IMPORT
) {
2092 spa_aux_check_removed(&spa
->spa_spares
);
2093 spa_aux_check_removed(&spa
->spa_l2cache
);
2098 * Load the vdev state for all toplevel vdevs.
2103 * Propagate the leaf DTLs we just loaded all the way up the tree.
2105 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2106 vdev_dtl_reassess(rvd
, 0, 0, B_FALSE
);
2107 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2110 * Load the DDTs (dedup tables).
2112 error
= ddt_load(spa
);
2114 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2116 spa_update_dspace(spa
);
2119 * Validate the config, using the MOS config to fill in any
2120 * information which might be missing. If we fail to validate
2121 * the config then declare the pool unfit for use. If we're
2122 * assembling a pool from a split, the log is not transferred
2125 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2128 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2129 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2131 if (!spa_config_valid(spa
, nvconfig
)) {
2132 nvlist_free(nvconfig
);
2133 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
,
2136 nvlist_free(nvconfig
);
2139 * Now that we've validate the config, check the state of the
2140 * root vdev. If it can't be opened, it indicates one or
2141 * more toplevel vdevs are faulted.
2143 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2146 if (spa_check_logs(spa
)) {
2147 *ereport
= FM_EREPORT_ZFS_LOG_REPLAY
;
2148 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_LOG
, ENXIO
));
2153 * We've successfully opened the pool, verify that we're ready
2154 * to start pushing transactions.
2156 if (state
!= SPA_LOAD_TRYIMPORT
) {
2157 if (error
= spa_load_verify(spa
))
2158 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2162 if (spa_writeable(spa
) && (state
== SPA_LOAD_RECOVER
||
2163 spa
->spa_load_max_txg
== UINT64_MAX
)) {
2165 int need_update
= B_FALSE
;
2167 ASSERT(state
!= SPA_LOAD_TRYIMPORT
);
2170 * Claim log blocks that haven't been committed yet.
2171 * This must all happen in a single txg.
2172 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2173 * invoked from zil_claim_log_block()'s i/o done callback.
2174 * Price of rollback is that we abandon the log.
2176 spa
->spa_claiming
= B_TRUE
;
2178 tx
= dmu_tx_create_assigned(spa_get_dsl(spa
),
2179 spa_first_txg(spa
));
2180 (void) dmu_objset_find(spa_name(spa
),
2181 zil_claim
, tx
, DS_FIND_CHILDREN
);
2184 spa
->spa_claiming
= B_FALSE
;
2186 spa_set_log_state(spa
, SPA_LOG_GOOD
);
2187 spa
->spa_sync_on
= B_TRUE
;
2188 txg_sync_start(spa
->spa_dsl_pool
);
2191 * Wait for all claims to sync. We sync up to the highest
2192 * claimed log block birth time so that claimed log blocks
2193 * don't appear to be from the future. spa_claim_max_txg
2194 * will have been set for us by either zil_check_log_chain()
2195 * (invoked from spa_check_logs()) or zil_claim() above.
2197 txg_wait_synced(spa
->spa_dsl_pool
, spa
->spa_claim_max_txg
);
2200 * If the config cache is stale, or we have uninitialized
2201 * metaslabs (see spa_vdev_add()), then update the config.
2203 * If this is a verbatim import, trust the current
2204 * in-core spa_config and update the disk labels.
2206 if (config_cache_txg
!= spa
->spa_config_txg
||
2207 state
== SPA_LOAD_IMPORT
||
2208 state
== SPA_LOAD_RECOVER
||
2209 (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
))
2210 need_update
= B_TRUE
;
2212 for (int c
= 0; c
< rvd
->vdev_children
; c
++)
2213 if (rvd
->vdev_child
[c
]->vdev_ms_array
== 0)
2214 need_update
= B_TRUE
;
2217 * Update the config cache asychronously in case we're the
2218 * root pool, in which case the config cache isn't writable yet.
2221 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
2224 * Check all DTLs to see if anything needs resilvering.
2226 if (!dsl_scan_resilvering(spa
->spa_dsl_pool
) &&
2227 vdev_resilver_needed(rvd
, NULL
, NULL
))
2228 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
2231 * Delete any inconsistent datasets.
2233 (void) dmu_objset_find(spa_name(spa
),
2234 dsl_destroy_inconsistent
, NULL
, DS_FIND_CHILDREN
);
2237 * Clean up any stale temporary dataset userrefs.
2239 dsl_pool_clean_tmp_userrefs(spa
->spa_dsl_pool
);
2246 spa_load_retry(spa_t
*spa
, spa_load_state_t state
, int mosconfig
)
2248 int mode
= spa
->spa_mode
;
2251 spa_deactivate(spa
);
2253 spa
->spa_load_max_txg
--;
2255 spa_activate(spa
, mode
);
2256 spa_async_suspend(spa
);
2258 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, mosconfig
));
2262 spa_load_best(spa_t
*spa
, spa_load_state_t state
, int mosconfig
,
2263 uint64_t max_request
, int rewind_flags
)
2265 nvlist_t
*config
= NULL
;
2266 int load_error
, rewind_error
;
2267 uint64_t safe_rewind_txg
;
2270 if (spa
->spa_load_txg
&& state
== SPA_LOAD_RECOVER
) {
2271 spa
->spa_load_max_txg
= spa
->spa_load_txg
;
2272 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2274 spa
->spa_load_max_txg
= max_request
;
2277 load_error
= rewind_error
= spa_load(spa
, state
, SPA_IMPORT_EXISTING
,
2279 if (load_error
== 0)
2282 if (spa
->spa_root_vdev
!= NULL
)
2283 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2285 spa
->spa_last_ubsync_txg
= spa
->spa_uberblock
.ub_txg
;
2286 spa
->spa_last_ubsync_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
2288 if (rewind_flags
& ZPOOL_NEVER_REWIND
) {
2289 nvlist_free(config
);
2290 return (load_error
);
2293 /* Price of rolling back is discarding txgs, including log */
2294 if (state
== SPA_LOAD_RECOVER
)
2295 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2297 spa
->spa_load_max_txg
= spa
->spa_last_ubsync_txg
;
2298 safe_rewind_txg
= spa
->spa_last_ubsync_txg
- TXG_DEFER_SIZE
;
2299 min_txg
= (rewind_flags
& ZPOOL_EXTREME_REWIND
) ?
2300 TXG_INITIAL
: safe_rewind_txg
;
2303 * Continue as long as we're finding errors, we're still within
2304 * the acceptable rewind range, and we're still finding uberblocks
2306 while (rewind_error
&& spa
->spa_uberblock
.ub_txg
>= min_txg
&&
2307 spa
->spa_uberblock
.ub_txg
<= spa
->spa_load_max_txg
) {
2308 if (spa
->spa_load_max_txg
< safe_rewind_txg
)
2309 spa
->spa_extreme_rewind
= B_TRUE
;
2310 rewind_error
= spa_load_retry(spa
, state
, mosconfig
);
2313 spa
->spa_extreme_rewind
= B_FALSE
;
2314 spa
->spa_load_max_txg
= UINT64_MAX
;
2316 if (config
&& (rewind_error
|| state
!= SPA_LOAD_RECOVER
))
2317 spa_config_set(spa
, config
);
2319 return (state
== SPA_LOAD_RECOVER
? rewind_error
: load_error
);
2325 * The import case is identical to an open except that the configuration is sent
2326 * down from userland, instead of grabbed from the configuration cache. For the
2327 * case of an open, the pool configuration will exist in the
2328 * POOL_STATE_UNINITIALIZED state.
2330 * The stats information (gen/count/ustats) is used to gather vdev statistics at
2331 * the same time open the pool, without having to keep around the spa_t in some
2335 spa_open_common(const char *pool
, spa_t
**spapp
, void *tag
, nvlist_t
*nvpolicy
,
2339 spa_load_state_t state
= SPA_LOAD_OPEN
;
2341 int locked
= B_FALSE
;
2346 * As disgusting as this is, we need to support recursive calls to this
2347 * function because dsl_dir_open() is called during spa_load(), and ends
2348 * up calling spa_open() again. The real fix is to figure out how to
2349 * avoid dsl_dir_open() calling this in the first place.
2351 if (mutex_owner(&spa_namespace_lock
) != curthread
) {
2352 mutex_enter(&spa_namespace_lock
);
2356 if ((spa
= spa_lookup(pool
)) == NULL
) {
2358 mutex_exit(&spa_namespace_lock
);
2362 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
) {
2363 zpool_rewind_policy_t policy
;
2365 zpool_get_rewind_policy(nvpolicy
? nvpolicy
: spa
->spa_config
,
2367 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
2368 state
= SPA_LOAD_RECOVER
;
2370 spa_activate(spa
, spa_mode_global
);
2372 if (state
!= SPA_LOAD_RECOVER
)
2373 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
2375 error
= spa_load_best(spa
, state
, B_FALSE
, policy
.zrp_txg
,
2376 policy
.zrp_request
);
2378 if (error
== EBADF
) {
2380 * If vdev_validate() returns failure (indicated by
2381 * EBADF), it indicates that one of the vdevs indicates
2382 * that the pool has been exported or destroyed. If
2383 * this is the case, the config cache is out of sync and
2384 * we should remove the pool from the namespace.
2387 spa_deactivate(spa
);
2388 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
2391 mutex_exit(&spa_namespace_lock
);
2397 * We can't open the pool, but we still have useful
2398 * information: the state of each vdev after the
2399 * attempted vdev_open(). Return this to the user.
2401 if (config
!= NULL
&& spa
->spa_config
) {
2402 VERIFY(nvlist_dup(spa
->spa_config
, config
,
2404 VERIFY(nvlist_add_nvlist(*config
,
2405 ZPOOL_CONFIG_LOAD_INFO
,
2406 spa
->spa_load_info
) == 0);
2409 spa_deactivate(spa
);
2410 spa
->spa_last_open_failed
= error
;
2412 mutex_exit(&spa_namespace_lock
);
2418 spa_open_ref(spa
, tag
);
2421 *config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2424 * If we've recovered the pool, pass back any information we
2425 * gathered while doing the load.
2427 if (state
== SPA_LOAD_RECOVER
) {
2428 VERIFY(nvlist_add_nvlist(*config
, ZPOOL_CONFIG_LOAD_INFO
,
2429 spa
->spa_load_info
) == 0);
2433 spa
->spa_last_open_failed
= 0;
2434 spa
->spa_last_ubsync_txg
= 0;
2435 spa
->spa_load_txg
= 0;
2436 mutex_exit(&spa_namespace_lock
);
2445 spa_open_rewind(const char *name
, spa_t
**spapp
, void *tag
, nvlist_t
*policy
,
2448 return (spa_open_common(name
, spapp
, tag
, policy
, config
));
2452 spa_open(const char *name
, spa_t
**spapp
, void *tag
)
2454 return (spa_open_common(name
, spapp
, tag
, NULL
, NULL
));
2458 * Lookup the given spa_t, incrementing the inject count in the process,
2459 * preventing it from being exported or destroyed.
2462 spa_inject_addref(char *name
)
2466 mutex_enter(&spa_namespace_lock
);
2467 if ((spa
= spa_lookup(name
)) == NULL
) {
2468 mutex_exit(&spa_namespace_lock
);
2471 spa
->spa_inject_ref
++;
2472 mutex_exit(&spa_namespace_lock
);
2478 spa_inject_delref(spa_t
*spa
)
2480 mutex_enter(&spa_namespace_lock
);
2481 spa
->spa_inject_ref
--;
2482 mutex_exit(&spa_namespace_lock
);
2486 * Add spares device information to the nvlist.
2489 spa_add_spares(spa_t
*spa
, nvlist_t
*config
)
2499 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2501 if (spa
->spa_spares
.sav_count
== 0)
2504 VERIFY(nvlist_lookup_nvlist(config
,
2505 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2506 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
2507 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2509 VERIFY(nvlist_add_nvlist_array(nvroot
,
2510 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
2511 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2512 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2515 * Go through and find any spares which have since been
2516 * repurposed as an active spare. If this is the case, update
2517 * their status appropriately.
2519 for (i
= 0; i
< nspares
; i
++) {
2520 VERIFY(nvlist_lookup_uint64(spares
[i
],
2521 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2522 if (spa_spare_exists(guid
, &pool
, NULL
) &&
2524 VERIFY(nvlist_lookup_uint64_array(
2525 spares
[i
], ZPOOL_CONFIG_VDEV_STATS
,
2526 (uint64_t **)&vs
, &vsc
) == 0);
2527 vs
->vs_state
= VDEV_STATE_CANT_OPEN
;
2528 vs
->vs_aux
= VDEV_AUX_SPARED
;
2535 * Add l2cache device information to the nvlist, including vdev stats.
2538 spa_add_l2cache(spa_t
*spa
, nvlist_t
*config
)
2541 uint_t i
, j
, nl2cache
;
2548 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2550 if (spa
->spa_l2cache
.sav_count
== 0)
2553 VERIFY(nvlist_lookup_nvlist(config
,
2554 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2555 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
2556 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2557 if (nl2cache
!= 0) {
2558 VERIFY(nvlist_add_nvlist_array(nvroot
,
2559 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
2560 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2561 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2564 * Update level 2 cache device stats.
2567 for (i
= 0; i
< nl2cache
; i
++) {
2568 VERIFY(nvlist_lookup_uint64(l2cache
[i
],
2569 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2572 for (j
= 0; j
< spa
->spa_l2cache
.sav_count
; j
++) {
2574 spa
->spa_l2cache
.sav_vdevs
[j
]->vdev_guid
) {
2575 vd
= spa
->spa_l2cache
.sav_vdevs
[j
];
2581 VERIFY(nvlist_lookup_uint64_array(l2cache
[i
],
2582 ZPOOL_CONFIG_VDEV_STATS
, (uint64_t **)&vs
, &vsc
)
2584 vdev_get_stats(vd
, vs
);
2590 spa_get_stats(const char *name
, nvlist_t
**config
, char *altroot
, size_t buflen
)
2596 error
= spa_open_common(name
, &spa
, FTAG
, NULL
, config
);
2600 * This still leaves a window of inconsistency where the spares
2601 * or l2cache devices could change and the config would be
2602 * self-inconsistent.
2604 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
2606 if (*config
!= NULL
) {
2607 uint64_t loadtimes
[2];
2609 loadtimes
[0] = spa
->spa_loaded_ts
.tv_sec
;
2610 loadtimes
[1] = spa
->spa_loaded_ts
.tv_nsec
;
2611 VERIFY(nvlist_add_uint64_array(*config
,
2612 ZPOOL_CONFIG_LOADED_TIME
, loadtimes
, 2) == 0);
2614 VERIFY(nvlist_add_uint64(*config
,
2615 ZPOOL_CONFIG_ERRCOUNT
,
2616 spa_get_errlog_size(spa
)) == 0);
2618 if (spa_suspended(spa
))
2619 VERIFY(nvlist_add_uint64(*config
,
2620 ZPOOL_CONFIG_SUSPENDED
,
2621 spa
->spa_failmode
) == 0);
2623 spa_add_spares(spa
, *config
);
2624 spa_add_l2cache(spa
, *config
);
2629 * We want to get the alternate root even for faulted pools, so we cheat
2630 * and call spa_lookup() directly.
2634 mutex_enter(&spa_namespace_lock
);
2635 spa
= spa_lookup(name
);
2637 spa_altroot(spa
, altroot
, buflen
);
2641 mutex_exit(&spa_namespace_lock
);
2643 spa_altroot(spa
, altroot
, buflen
);
2648 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
2649 spa_close(spa
, FTAG
);
2656 * Validate that the auxiliary device array is well formed. We must have an
2657 * array of nvlists, each which describes a valid leaf vdev. If this is an
2658 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
2659 * specified, as long as they are well-formed.
2662 spa_validate_aux_devs(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
,
2663 spa_aux_vdev_t
*sav
, const char *config
, uint64_t version
,
2664 vdev_labeltype_t label
)
2671 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
2674 * It's acceptable to have no devs specified.
2676 if (nvlist_lookup_nvlist_array(nvroot
, config
, &dev
, &ndev
) != 0)
2683 * Make sure the pool is formatted with a version that supports this
2686 if (spa_version(spa
) < version
)
2690 * Set the pending device list so we correctly handle device in-use
2693 sav
->sav_pending
= dev
;
2694 sav
->sav_npending
= ndev
;
2696 for (i
= 0; i
< ndev
; i
++) {
2697 if ((error
= spa_config_parse(spa
, &vd
, dev
[i
], NULL
, 0,
2701 if (!vd
->vdev_ops
->vdev_op_leaf
) {
2708 * The L2ARC currently only supports disk devices in
2709 * kernel context. For user-level testing, we allow it.
2712 if ((strcmp(config
, ZPOOL_CONFIG_L2CACHE
) == 0) &&
2713 strcmp(vd
->vdev_ops
->vdev_op_type
, VDEV_TYPE_DISK
) != 0) {
2720 if ((error
= vdev_open(vd
)) == 0 &&
2721 (error
= vdev_label_init(vd
, crtxg
, label
)) == 0) {
2722 VERIFY(nvlist_add_uint64(dev
[i
], ZPOOL_CONFIG_GUID
,
2723 vd
->vdev_guid
) == 0);
2729 (mode
!= VDEV_ALLOC_SPARE
&& mode
!= VDEV_ALLOC_L2CACHE
))
2736 sav
->sav_pending
= NULL
;
2737 sav
->sav_npending
= 0;
2742 spa_validate_aux(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
)
2746 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
2748 if ((error
= spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
2749 &spa
->spa_spares
, ZPOOL_CONFIG_SPARES
, SPA_VERSION_SPARES
,
2750 VDEV_LABEL_SPARE
)) != 0) {
2754 return (spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
2755 &spa
->spa_l2cache
, ZPOOL_CONFIG_L2CACHE
, SPA_VERSION_L2CACHE
,
2756 VDEV_LABEL_L2CACHE
));
2760 spa_set_aux_vdevs(spa_aux_vdev_t
*sav
, nvlist_t
**devs
, int ndevs
,
2765 if (sav
->sav_config
!= NULL
) {
2771 * Generate new dev list by concatentating with the
2774 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
, config
,
2775 &olddevs
, &oldndevs
) == 0);
2777 newdevs
= kmem_alloc(sizeof (void *) *
2778 (ndevs
+ oldndevs
), KM_SLEEP
);
2779 for (i
= 0; i
< oldndevs
; i
++)
2780 VERIFY(nvlist_dup(olddevs
[i
], &newdevs
[i
],
2782 for (i
= 0; i
< ndevs
; i
++)
2783 VERIFY(nvlist_dup(devs
[i
], &newdevs
[i
+ oldndevs
],
2786 VERIFY(nvlist_remove(sav
->sav_config
, config
,
2787 DATA_TYPE_NVLIST_ARRAY
) == 0);
2789 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
2790 config
, newdevs
, ndevs
+ oldndevs
) == 0);
2791 for (i
= 0; i
< oldndevs
+ ndevs
; i
++)
2792 nvlist_free(newdevs
[i
]);
2793 kmem_free(newdevs
, (oldndevs
+ ndevs
) * sizeof (void *));
2796 * Generate a new dev list.
2798 VERIFY(nvlist_alloc(&sav
->sav_config
, NV_UNIQUE_NAME
,
2800 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
, config
,
2806 * Stop and drop level 2 ARC devices
2809 spa_l2cache_drop(spa_t
*spa
)
2813 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
2815 for (i
= 0; i
< sav
->sav_count
; i
++) {
2818 vd
= sav
->sav_vdevs
[i
];
2821 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
2822 pool
!= 0ULL && l2arc_vdev_present(vd
))
2823 l2arc_remove_vdev(vd
);
2824 if (vd
->vdev_isl2cache
)
2825 spa_l2cache_remove(vd
);
2826 vdev_clear_stats(vd
);
2827 (void) vdev_close(vd
);
2835 spa_create(const char *pool
, nvlist_t
*nvroot
, nvlist_t
*props
,
2836 const char *history_str
, nvlist_t
*zplprops
)
2839 char *altroot
= NULL
;
2844 uint64_t txg
= TXG_INITIAL
;
2845 nvlist_t
**spares
, **l2cache
;
2846 uint_t nspares
, nl2cache
;
2847 uint64_t version
, obj
;
2850 * If this pool already exists, return failure.
2852 mutex_enter(&spa_namespace_lock
);
2853 if (spa_lookup(pool
) != NULL
) {
2854 mutex_exit(&spa_namespace_lock
);
2859 * Allocate a new spa_t structure.
2861 (void) nvlist_lookup_string(props
,
2862 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
2863 spa
= spa_add(pool
, NULL
, altroot
);
2864 spa_activate(spa
, spa_mode_global
);
2866 if (props
&& (error
= spa_prop_validate(spa
, props
))) {
2867 spa_deactivate(spa
);
2869 mutex_exit(&spa_namespace_lock
);
2873 if (nvlist_lookup_uint64(props
, zpool_prop_to_name(ZPOOL_PROP_VERSION
),
2875 version
= SPA_VERSION
;
2876 ASSERT(version
<= SPA_VERSION
);
2878 spa
->spa_first_txg
= txg
;
2879 spa
->spa_uberblock
.ub_txg
= txg
- 1;
2880 spa
->spa_uberblock
.ub_version
= version
;
2881 spa
->spa_ubsync
= spa
->spa_uberblock
;
2884 * Create "The Godfather" zio to hold all async IOs
2886 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
2887 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
2890 * Create the root vdev.
2892 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2894 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, VDEV_ALLOC_ADD
);
2896 ASSERT(error
!= 0 || rvd
!= NULL
);
2897 ASSERT(error
!= 0 || spa
->spa_root_vdev
== rvd
);
2899 if (error
== 0 && !zfs_allocatable_devs(nvroot
))
2903 (error
= vdev_create(rvd
, txg
, B_FALSE
)) == 0 &&
2904 (error
= spa_validate_aux(spa
, nvroot
, txg
,
2905 VDEV_ALLOC_ADD
)) == 0) {
2906 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
2907 vdev_metaslab_set_size(rvd
->vdev_child
[c
]);
2908 vdev_expand(rvd
->vdev_child
[c
], txg
);
2912 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2916 spa_deactivate(spa
);
2918 mutex_exit(&spa_namespace_lock
);
2923 * Get the list of spares, if specified.
2925 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
2926 &spares
, &nspares
) == 0) {
2927 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
, NV_UNIQUE_NAME
,
2929 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
2930 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
2931 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2932 spa_load_spares(spa
);
2933 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2934 spa
->spa_spares
.sav_sync
= B_TRUE
;
2938 * Get the list of level 2 cache devices, if specified.
2940 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
2941 &l2cache
, &nl2cache
) == 0) {
2942 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
2943 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
2944 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
2945 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
2946 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2947 spa_load_l2cache(spa
);
2948 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2949 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
2952 spa
->spa_dsl_pool
= dp
= dsl_pool_create(spa
, zplprops
, txg
);
2953 spa
->spa_meta_objset
= dp
->dp_meta_objset
;
2956 * Create DDTs (dedup tables).
2960 spa_update_dspace(spa
);
2962 tx
= dmu_tx_create_assigned(dp
, txg
);
2965 * Create the pool config object.
2967 spa
->spa_config_object
= dmu_object_alloc(spa
->spa_meta_objset
,
2968 DMU_OT_PACKED_NVLIST
, SPA_CONFIG_BLOCKSIZE
,
2969 DMU_OT_PACKED_NVLIST_SIZE
, sizeof (uint64_t), tx
);
2971 if (zap_add(spa
->spa_meta_objset
,
2972 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CONFIG
,
2973 sizeof (uint64_t), 1, &spa
->spa_config_object
, tx
) != 0) {
2974 cmn_err(CE_PANIC
, "failed to add pool config");
2977 if (zap_add(spa
->spa_meta_objset
,
2978 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CREATION_VERSION
,
2979 sizeof (uint64_t), 1, &version
, tx
) != 0) {
2980 cmn_err(CE_PANIC
, "failed to add pool version");
2983 /* Newly created pools with the right version are always deflated. */
2984 if (version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
2985 spa
->spa_deflate
= TRUE
;
2986 if (zap_add(spa
->spa_meta_objset
,
2987 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
2988 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
) != 0) {
2989 cmn_err(CE_PANIC
, "failed to add deflate");
2994 * Create the deferred-free bpobj. Turn off compression
2995 * because sync-to-convergence takes longer if the blocksize
2998 obj
= bpobj_alloc(spa
->spa_meta_objset
, 1 << 14, tx
);
2999 dmu_object_set_compress(spa
->spa_meta_objset
, obj
,
3000 ZIO_COMPRESS_OFF
, tx
);
3001 if (zap_add(spa
->spa_meta_objset
,
3002 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_SYNC_BPOBJ
,
3003 sizeof (uint64_t), 1, &obj
, tx
) != 0) {
3004 cmn_err(CE_PANIC
, "failed to add bpobj");
3006 VERIFY3U(0, ==, bpobj_open(&spa
->spa_deferred_bpobj
,
3007 spa
->spa_meta_objset
, obj
));
3010 * Create the pool's history object.
3012 if (version
>= SPA_VERSION_ZPOOL_HISTORY
)
3013 spa_history_create_obj(spa
, tx
);
3016 * Set pool properties.
3018 spa
->spa_bootfs
= zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS
);
3019 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
3020 spa
->spa_failmode
= zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE
);
3021 spa
->spa_autoexpand
= zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND
);
3023 if (props
!= NULL
) {
3024 spa_configfile_set(spa
, props
, B_FALSE
);
3025 spa_sync_props(spa
, props
, tx
);
3030 spa
->spa_sync_on
= B_TRUE
;
3031 txg_sync_start(spa
->spa_dsl_pool
);
3034 * We explicitly wait for the first transaction to complete so that our
3035 * bean counters are appropriately updated.
3037 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
3039 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3041 if (version
>= SPA_VERSION_ZPOOL_HISTORY
&& history_str
!= NULL
)
3042 (void) spa_history_log(spa
, history_str
, LOG_CMD_POOL_CREATE
);
3043 spa_history_log_version(spa
, LOG_POOL_CREATE
);
3045 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
3047 mutex_exit(&spa_namespace_lock
);
3054 * Get the root pool information from the root disk, then import the root pool
3055 * during the system boot up time.
3057 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t
**);
3060 spa_generate_rootconf(char *devpath
, char *devid
, uint64_t *guid
)
3063 nvlist_t
*nvtop
, *nvroot
;
3066 if (vdev_disk_read_rootlabel(devpath
, devid
, &config
) != 0)
3070 * Add this top-level vdev to the child array.
3072 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3074 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
3076 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_GUID
, guid
) == 0);
3079 * Put this pool's top-level vdevs into a root vdev.
3081 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3082 VERIFY(nvlist_add_string(nvroot
, ZPOOL_CONFIG_TYPE
,
3083 VDEV_TYPE_ROOT
) == 0);
3084 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_ID
, 0ULL) == 0);
3085 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_GUID
, pgid
) == 0);
3086 VERIFY(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
3090 * Replace the existing vdev_tree with the new root vdev in
3091 * this pool's configuration (remove the old, add the new).
3093 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, nvroot
) == 0);
3094 nvlist_free(nvroot
);
3099 * Walk the vdev tree and see if we can find a device with "better"
3100 * configuration. A configuration is "better" if the label on that
3101 * device has a more recent txg.
3104 spa_alt_rootvdev(vdev_t
*vd
, vdev_t
**avd
, uint64_t *txg
)
3106 for (int c
= 0; c
< vd
->vdev_children
; c
++)
3107 spa_alt_rootvdev(vd
->vdev_child
[c
], avd
, txg
);
3109 if (vd
->vdev_ops
->vdev_op_leaf
) {
3113 if (vdev_disk_read_rootlabel(vd
->vdev_physpath
, vd
->vdev_devid
,
3117 VERIFY(nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_TXG
,
3121 * Do we have a better boot device?
3123 if (label_txg
> *txg
) {
3132 * Import a root pool.
3134 * For x86. devpath_list will consist of devid and/or physpath name of
3135 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3136 * The GRUB "findroot" command will return the vdev we should boot.
3138 * For Sparc, devpath_list consists the physpath name of the booting device
3139 * no matter the rootpool is a single device pool or a mirrored pool.
3141 * "/pci@1f,0/ide@d/disk@0,0:a"
3144 spa_import_rootpool(char *devpath
, char *devid
)
3147 vdev_t
*rvd
, *bvd
, *avd
= NULL
;
3148 nvlist_t
*config
, *nvtop
;
3154 * Read the label from the boot device and generate a configuration.
3156 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3157 #if defined(_OBP) && defined(_KERNEL)
3158 if (config
== NULL
) {
3159 if (strstr(devpath
, "/iscsi/ssd") != NULL
) {
3161 get_iscsi_bootpath_phy(devpath
);
3162 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3166 if (config
== NULL
) {
3167 cmn_err(CE_NOTE
, "Can not read the pool label from '%s'",
3172 VERIFY(nvlist_lookup_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3174 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
, &txg
) == 0);
3176 mutex_enter(&spa_namespace_lock
);
3177 if ((spa
= spa_lookup(pname
)) != NULL
) {
3179 * Remove the existing root pool from the namespace so that we
3180 * can replace it with the correct config we just read in.
3185 spa
= spa_add(pname
, config
, NULL
);
3186 spa
->spa_is_root
= B_TRUE
;
3187 spa
->spa_import_flags
= ZFS_IMPORT_VERBATIM
;
3190 * Build up a vdev tree based on the boot device's label config.
3192 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3194 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3195 error
= spa_config_parse(spa
, &rvd
, nvtop
, NULL
, 0,
3196 VDEV_ALLOC_ROOTPOOL
);
3197 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3199 mutex_exit(&spa_namespace_lock
);
3200 nvlist_free(config
);
3201 cmn_err(CE_NOTE
, "Can not parse the config for pool '%s'",
3207 * Get the boot vdev.
3209 if ((bvd
= vdev_lookup_by_guid(rvd
, guid
)) == NULL
) {
3210 cmn_err(CE_NOTE
, "Can not find the boot vdev for guid %llu",
3211 (u_longlong_t
)guid
);
3217 * Determine if there is a better boot device.
3220 spa_alt_rootvdev(rvd
, &avd
, &txg
);
3222 cmn_err(CE_NOTE
, "The boot device is 'degraded'. Please "
3223 "try booting from '%s'", avd
->vdev_path
);
3229 * If the boot device is part of a spare vdev then ensure that
3230 * we're booting off the active spare.
3232 if (bvd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
3233 !bvd
->vdev_isspare
) {
3234 cmn_err(CE_NOTE
, "The boot device is currently spared. Please "
3235 "try booting from '%s'",
3237 vdev_child
[bvd
->vdev_parent
->vdev_children
- 1]->vdev_path
);
3243 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3245 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3247 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3248 mutex_exit(&spa_namespace_lock
);
3250 nvlist_free(config
);
3257 * Import a non-root pool into the system.
3260 spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
, uint64_t flags
)
3263 char *altroot
= NULL
;
3264 spa_load_state_t state
= SPA_LOAD_IMPORT
;
3265 zpool_rewind_policy_t policy
;
3266 uint64_t mode
= spa_mode_global
;
3267 uint64_t readonly
= B_FALSE
;
3270 nvlist_t
**spares
, **l2cache
;
3271 uint_t nspares
, nl2cache
;
3274 * If a pool with this name exists, return failure.
3276 mutex_enter(&spa_namespace_lock
);
3277 if (spa_lookup(pool
) != NULL
) {
3278 mutex_exit(&spa_namespace_lock
);
3283 * Create and initialize the spa structure.
3285 (void) nvlist_lookup_string(props
,
3286 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3287 (void) nvlist_lookup_uint64(props
,
3288 zpool_prop_to_name(ZPOOL_PROP_READONLY
), &readonly
);
3291 spa
= spa_add(pool
, config
, altroot
);
3292 spa
->spa_import_flags
= flags
;
3295 * Verbatim import - Take a pool and insert it into the namespace
3296 * as if it had been loaded at boot.
3298 if (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) {
3300 spa_configfile_set(spa
, props
, B_FALSE
);
3302 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3304 mutex_exit(&spa_namespace_lock
);
3305 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3310 spa_activate(spa
, mode
);
3313 * Don't start async tasks until we know everything is healthy.
3315 spa_async_suspend(spa
);
3317 zpool_get_rewind_policy(config
, &policy
);
3318 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
3319 state
= SPA_LOAD_RECOVER
;
3322 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
3323 * because the user-supplied config is actually the one to trust when
3326 if (state
!= SPA_LOAD_RECOVER
)
3327 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
3329 error
= spa_load_best(spa
, state
, B_TRUE
, policy
.zrp_txg
,
3330 policy
.zrp_request
);
3333 * Propagate anything learned while loading the pool and pass it
3334 * back to caller (i.e. rewind info, missing devices, etc).
3336 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
3337 spa
->spa_load_info
) == 0);
3339 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3341 * Toss any existing sparelist, as it doesn't have any validity
3342 * anymore, and conflicts with spa_has_spare().
3344 if (spa
->spa_spares
.sav_config
) {
3345 nvlist_free(spa
->spa_spares
.sav_config
);
3346 spa
->spa_spares
.sav_config
= NULL
;
3347 spa_load_spares(spa
);
3349 if (spa
->spa_l2cache
.sav_config
) {
3350 nvlist_free(spa
->spa_l2cache
.sav_config
);
3351 spa
->spa_l2cache
.sav_config
= NULL
;
3352 spa_load_l2cache(spa
);
3355 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3358 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3361 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3362 VDEV_ALLOC_L2CACHE
);
3363 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3366 spa_configfile_set(spa
, props
, B_FALSE
);
3368 if (error
!= 0 || (props
&& spa_writeable(spa
) &&
3369 (error
= spa_prop_set(spa
, props
)))) {
3371 spa_deactivate(spa
);
3373 mutex_exit(&spa_namespace_lock
);
3377 spa_async_resume(spa
);
3380 * Override any spares and level 2 cache devices as specified by
3381 * the user, as these may have correct device names/devids, etc.
3383 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3384 &spares
, &nspares
) == 0) {
3385 if (spa
->spa_spares
.sav_config
)
3386 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
,
3387 ZPOOL_CONFIG_SPARES
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3389 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
,
3390 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3391 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3392 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3393 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3394 spa_load_spares(spa
);
3395 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3396 spa
->spa_spares
.sav_sync
= B_TRUE
;
3398 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3399 &l2cache
, &nl2cache
) == 0) {
3400 if (spa
->spa_l2cache
.sav_config
)
3401 VERIFY(nvlist_remove(spa
->spa_l2cache
.sav_config
,
3402 ZPOOL_CONFIG_L2CACHE
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3404 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3405 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3406 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3407 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3408 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3409 spa_load_l2cache(spa
);
3410 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3411 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3415 * Check for any removed devices.
3417 if (spa
->spa_autoreplace
) {
3418 spa_aux_check_removed(&spa
->spa_spares
);
3419 spa_aux_check_removed(&spa
->spa_l2cache
);
3422 if (spa_writeable(spa
)) {
3424 * Update the config cache to include the newly-imported pool.
3426 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
3430 * It's possible that the pool was expanded while it was exported.
3431 * We kick off an async task to handle this for us.
3433 spa_async_request(spa
, SPA_ASYNC_AUTOEXPAND
);
3435 mutex_exit(&spa_namespace_lock
);
3436 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3442 spa_tryimport(nvlist_t
*tryconfig
)
3444 nvlist_t
*config
= NULL
;
3450 if (nvlist_lookup_string(tryconfig
, ZPOOL_CONFIG_POOL_NAME
, &poolname
))
3453 if (nvlist_lookup_uint64(tryconfig
, ZPOOL_CONFIG_POOL_STATE
, &state
))
3457 * Create and initialize the spa structure.
3459 mutex_enter(&spa_namespace_lock
);
3460 spa
= spa_add(TRYIMPORT_NAME
, tryconfig
, NULL
);
3461 spa_activate(spa
, FREAD
);
3464 * Pass off the heavy lifting to spa_load().
3465 * Pass TRUE for mosconfig because the user-supplied config
3466 * is actually the one to trust when doing an import.
3468 error
= spa_load(spa
, SPA_LOAD_TRYIMPORT
, SPA_IMPORT_EXISTING
, B_TRUE
);
3471 * If 'tryconfig' was at least parsable, return the current config.
3473 if (spa
->spa_root_vdev
!= NULL
) {
3474 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
3475 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3477 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
3479 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_TIMESTAMP
,
3480 spa
->spa_uberblock
.ub_timestamp
) == 0);
3483 * If the bootfs property exists on this pool then we
3484 * copy it out so that external consumers can tell which
3485 * pools are bootable.
3487 if ((!error
|| error
== EEXIST
) && spa
->spa_bootfs
) {
3488 char *tmpname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
3491 * We have to play games with the name since the
3492 * pool was opened as TRYIMPORT_NAME.
3494 if (dsl_dsobj_to_dsname(spa_name(spa
),
3495 spa
->spa_bootfs
, tmpname
) == 0) {
3497 char *dsname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
3499 cp
= strchr(tmpname
, '/');
3501 (void) strlcpy(dsname
, tmpname
,
3504 (void) snprintf(dsname
, MAXPATHLEN
,
3505 "%s/%s", poolname
, ++cp
);
3507 VERIFY(nvlist_add_string(config
,
3508 ZPOOL_CONFIG_BOOTFS
, dsname
) == 0);
3509 kmem_free(dsname
, MAXPATHLEN
);
3511 kmem_free(tmpname
, MAXPATHLEN
);
3515 * Add the list of hot spares and level 2 cache devices.
3517 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3518 spa_add_spares(spa
, config
);
3519 spa_add_l2cache(spa
, config
);
3520 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3524 spa_deactivate(spa
);
3526 mutex_exit(&spa_namespace_lock
);
3532 * Pool export/destroy
3534 * The act of destroying or exporting a pool is very simple. We make sure there
3535 * is no more pending I/O and any references to the pool are gone. Then, we
3536 * update the pool state and sync all the labels to disk, removing the
3537 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
3538 * we don't sync the labels or remove the configuration cache.
3541 spa_export_common(char *pool
, int new_state
, nvlist_t
**oldconfig
,
3542 boolean_t force
, boolean_t hardforce
)
3549 if (!(spa_mode_global
& FWRITE
))
3552 mutex_enter(&spa_namespace_lock
);
3553 if ((spa
= spa_lookup(pool
)) == NULL
) {
3554 mutex_exit(&spa_namespace_lock
);
3559 * Put a hold on the pool, drop the namespace lock, stop async tasks,
3560 * reacquire the namespace lock, and see if we can export.
3562 spa_open_ref(spa
, FTAG
);
3563 mutex_exit(&spa_namespace_lock
);
3564 spa_async_suspend(spa
);
3565 mutex_enter(&spa_namespace_lock
);
3566 spa_close(spa
, FTAG
);
3569 * The pool will be in core if it's openable,
3570 * in which case we can modify its state.
3572 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
&& spa
->spa_sync_on
) {
3574 * Objsets may be open only because they're dirty, so we
3575 * have to force it to sync before checking spa_refcnt.
3577 txg_wait_synced(spa
->spa_dsl_pool
, 0);
3580 * A pool cannot be exported or destroyed if there are active
3581 * references. If we are resetting a pool, allow references by
3582 * fault injection handlers.
3584 if (!spa_refcount_zero(spa
) ||
3585 (spa
->spa_inject_ref
!= 0 &&
3586 new_state
!= POOL_STATE_UNINITIALIZED
)) {
3587 spa_async_resume(spa
);
3588 mutex_exit(&spa_namespace_lock
);
3593 * A pool cannot be exported if it has an active shared spare.
3594 * This is to prevent other pools stealing the active spare
3595 * from an exported pool. At user's own will, such pool can
3596 * be forcedly exported.
3598 if (!force
&& new_state
== POOL_STATE_EXPORTED
&&
3599 spa_has_active_shared_spare(spa
)) {
3600 spa_async_resume(spa
);
3601 mutex_exit(&spa_namespace_lock
);
3606 * We want this to be reflected on every label,
3607 * so mark them all dirty. spa_unload() will do the
3608 * final sync that pushes these changes out.
3610 if (new_state
!= POOL_STATE_UNINITIALIZED
&& !hardforce
) {
3611 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3612 spa
->spa_state
= new_state
;
3613 spa
->spa_final_txg
= spa_last_synced_txg(spa
) +
3615 vdev_config_dirty(spa
->spa_root_vdev
);
3616 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3620 spa_event_notify(spa
, NULL
, ESC_ZFS_POOL_DESTROY
);
3622 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
3624 spa_deactivate(spa
);
3627 if (oldconfig
&& spa
->spa_config
)
3628 VERIFY(nvlist_dup(spa
->spa_config
, oldconfig
, 0) == 0);
3630 if (new_state
!= POOL_STATE_UNINITIALIZED
) {
3632 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
3635 mutex_exit(&spa_namespace_lock
);
3641 * Destroy a storage pool.
3644 spa_destroy(char *pool
)
3646 return (spa_export_common(pool
, POOL_STATE_DESTROYED
, NULL
,
3651 * Export a storage pool.
3654 spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
3655 boolean_t hardforce
)
3657 return (spa_export_common(pool
, POOL_STATE_EXPORTED
, oldconfig
,
3662 * Similar to spa_export(), this unloads the spa_t without actually removing it
3663 * from the namespace in any way.
3666 spa_reset(char *pool
)
3668 return (spa_export_common(pool
, POOL_STATE_UNINITIALIZED
, NULL
,
3673 * ==========================================================================
3674 * Device manipulation
3675 * ==========================================================================
3679 * Add a device to a storage pool.
3682 spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
)
3686 vdev_t
*rvd
= spa
->spa_root_vdev
;
3688 nvlist_t
**spares
, **l2cache
;
3689 uint_t nspares
, nl2cache
;
3691 ASSERT(spa_writeable(spa
));
3693 txg
= spa_vdev_enter(spa
);
3695 if ((error
= spa_config_parse(spa
, &vd
, nvroot
, NULL
, 0,
3696 VDEV_ALLOC_ADD
)) != 0)
3697 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
3699 spa
->spa_pending_vdev
= vd
; /* spa_vdev_exit() will clear this */
3701 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
, &spares
,
3705 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
, &l2cache
,
3709 if (vd
->vdev_children
== 0 && nspares
== 0 && nl2cache
== 0)
3710 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
3712 if (vd
->vdev_children
!= 0 &&
3713 (error
= vdev_create(vd
, txg
, B_FALSE
)) != 0)
3714 return (spa_vdev_exit(spa
, vd
, txg
, error
));
3717 * We must validate the spares and l2cache devices after checking the
3718 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
3720 if ((error
= spa_validate_aux(spa
, nvroot
, txg
, VDEV_ALLOC_ADD
)) != 0)
3721 return (spa_vdev_exit(spa
, vd
, txg
, error
));
3724 * Transfer each new top-level vdev from vd to rvd.
3726 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
3729 * Set the vdev id to the first hole, if one exists.
3731 for (id
= 0; id
< rvd
->vdev_children
; id
++) {
3732 if (rvd
->vdev_child
[id
]->vdev_ishole
) {
3733 vdev_free(rvd
->vdev_child
[id
]);
3737 tvd
= vd
->vdev_child
[c
];
3738 vdev_remove_child(vd
, tvd
);
3740 vdev_add_child(rvd
, tvd
);
3741 vdev_config_dirty(tvd
);
3745 spa_set_aux_vdevs(&spa
->spa_spares
, spares
, nspares
,
3746 ZPOOL_CONFIG_SPARES
);
3747 spa_load_spares(spa
);
3748 spa
->spa_spares
.sav_sync
= B_TRUE
;
3751 if (nl2cache
!= 0) {
3752 spa_set_aux_vdevs(&spa
->spa_l2cache
, l2cache
, nl2cache
,
3753 ZPOOL_CONFIG_L2CACHE
);
3754 spa_load_l2cache(spa
);
3755 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3759 * We have to be careful when adding new vdevs to an existing pool.
3760 * If other threads start allocating from these vdevs before we
3761 * sync the config cache, and we lose power, then upon reboot we may
3762 * fail to open the pool because there are DVAs that the config cache
3763 * can't translate. Therefore, we first add the vdevs without
3764 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
3765 * and then let spa_config_update() initialize the new metaslabs.
3767 * spa_load() checks for added-but-not-initialized vdevs, so that
3768 * if we lose power at any point in this sequence, the remaining
3769 * steps will be completed the next time we load the pool.
3771 (void) spa_vdev_exit(spa
, vd
, txg
, 0);
3773 mutex_enter(&spa_namespace_lock
);
3774 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
3775 mutex_exit(&spa_namespace_lock
);
3781 * Attach a device to a mirror. The arguments are the path to any device
3782 * in the mirror, and the nvroot for the new device. If the path specifies
3783 * a device that is not mirrored, we automatically insert the mirror vdev.
3785 * If 'replacing' is specified, the new device is intended to replace the
3786 * existing device; in this case the two devices are made into their own
3787 * mirror using the 'replacing' vdev, which is functionally identical to
3788 * the mirror vdev (it actually reuses all the same ops) but has a few
3789 * extra rules: you can't attach to it after it's been created, and upon
3790 * completion of resilvering, the first disk (the one being replaced)
3791 * is automatically detached.
3794 spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
, int replacing
)
3796 uint64_t txg
, dtl_max_txg
;
3797 vdev_t
*rvd
= spa
->spa_root_vdev
;
3798 vdev_t
*oldvd
, *newvd
, *newrootvd
, *pvd
, *tvd
;
3800 char *oldvdpath
, *newvdpath
;
3804 ASSERT(spa_writeable(spa
));
3806 txg
= spa_vdev_enter(spa
);
3808 oldvd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
3811 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
3813 if (!oldvd
->vdev_ops
->vdev_op_leaf
)
3814 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
3816 pvd
= oldvd
->vdev_parent
;
3818 if ((error
= spa_config_parse(spa
, &newrootvd
, nvroot
, NULL
, 0,
3819 VDEV_ALLOC_ADD
)) != 0)
3820 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
3822 if (newrootvd
->vdev_children
!= 1)
3823 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
3825 newvd
= newrootvd
->vdev_child
[0];
3827 if (!newvd
->vdev_ops
->vdev_op_leaf
)
3828 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
3830 if ((error
= vdev_create(newrootvd
, txg
, replacing
)) != 0)
3831 return (spa_vdev_exit(spa
, newrootvd
, txg
, error
));
3834 * Spares can't replace logs
3836 if (oldvd
->vdev_top
->vdev_islog
&& newvd
->vdev_isspare
)
3837 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3841 * For attach, the only allowable parent is a mirror or the root
3844 if (pvd
->vdev_ops
!= &vdev_mirror_ops
&&
3845 pvd
->vdev_ops
!= &vdev_root_ops
)
3846 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3848 pvops
= &vdev_mirror_ops
;
3851 * Active hot spares can only be replaced by inactive hot
3854 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
3855 oldvd
->vdev_isspare
&&
3856 !spa_has_spare(spa
, newvd
->vdev_guid
))
3857 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3860 * If the source is a hot spare, and the parent isn't already a
3861 * spare, then we want to create a new hot spare. Otherwise, we
3862 * want to create a replacing vdev. The user is not allowed to
3863 * attach to a spared vdev child unless the 'isspare' state is
3864 * the same (spare replaces spare, non-spare replaces
3867 if (pvd
->vdev_ops
== &vdev_replacing_ops
&&
3868 spa_version(spa
) < SPA_VERSION_MULTI_REPLACE
) {
3869 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3870 } else if (pvd
->vdev_ops
== &vdev_spare_ops
&&
3871 newvd
->vdev_isspare
!= oldvd
->vdev_isspare
) {
3872 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3875 if (newvd
->vdev_isspare
)
3876 pvops
= &vdev_spare_ops
;
3878 pvops
= &vdev_replacing_ops
;
3882 * Make sure the new device is big enough.
3884 if (newvd
->vdev_asize
< vdev_get_min_asize(oldvd
))
3885 return (spa_vdev_exit(spa
, newrootvd
, txg
, EOVERFLOW
));
3888 * The new device cannot have a higher alignment requirement
3889 * than the top-level vdev.
3891 if (newvd
->vdev_ashift
> oldvd
->vdev_top
->vdev_ashift
)
3892 return (spa_vdev_exit(spa
, newrootvd
, txg
, EDOM
));
3895 * If this is an in-place replacement, update oldvd's path and devid
3896 * to make it distinguishable from newvd, and unopenable from now on.
3898 if (strcmp(oldvd
->vdev_path
, newvd
->vdev_path
) == 0) {
3899 spa_strfree(oldvd
->vdev_path
);
3900 oldvd
->vdev_path
= kmem_alloc(strlen(newvd
->vdev_path
) + 5,
3902 (void) sprintf(oldvd
->vdev_path
, "%s/%s",
3903 newvd
->vdev_path
, "old");
3904 if (oldvd
->vdev_devid
!= NULL
) {
3905 spa_strfree(oldvd
->vdev_devid
);
3906 oldvd
->vdev_devid
= NULL
;
3910 /* mark the device being resilvered */
3911 newvd
->vdev_resilvering
= B_TRUE
;
3914 * If the parent is not a mirror, or if we're replacing, insert the new
3915 * mirror/replacing/spare vdev above oldvd.
3917 if (pvd
->vdev_ops
!= pvops
)
3918 pvd
= vdev_add_parent(oldvd
, pvops
);
3920 ASSERT(pvd
->vdev_top
->vdev_parent
== rvd
);
3921 ASSERT(pvd
->vdev_ops
== pvops
);
3922 ASSERT(oldvd
->vdev_parent
== pvd
);
3925 * Extract the new device from its root and add it to pvd.
3927 vdev_remove_child(newrootvd
, newvd
);
3928 newvd
->vdev_id
= pvd
->vdev_children
;
3929 newvd
->vdev_crtxg
= oldvd
->vdev_crtxg
;
3930 vdev_add_child(pvd
, newvd
);
3932 tvd
= newvd
->vdev_top
;
3933 ASSERT(pvd
->vdev_top
== tvd
);
3934 ASSERT(tvd
->vdev_parent
== rvd
);
3936 vdev_config_dirty(tvd
);
3939 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
3940 * for any dmu_sync-ed blocks. It will propagate upward when
3941 * spa_vdev_exit() calls vdev_dtl_reassess().
3943 dtl_max_txg
= txg
+ TXG_CONCURRENT_STATES
;
3945 vdev_dtl_dirty(newvd
, DTL_MISSING
, TXG_INITIAL
,
3946 dtl_max_txg
- TXG_INITIAL
);
3948 if (newvd
->vdev_isspare
) {
3949 spa_spare_activate(newvd
);
3950 spa_event_notify(spa
, newvd
, ESC_ZFS_VDEV_SPARE
);
3953 oldvdpath
= spa_strdup(oldvd
->vdev_path
);
3954 newvdpath
= spa_strdup(newvd
->vdev_path
);
3955 newvd_isspare
= newvd
->vdev_isspare
;
3958 * Mark newvd's DTL dirty in this txg.
3960 vdev_dirty(tvd
, VDD_DTL
, newvd
, txg
);
3963 * Restart the resilver
3965 dsl_resilver_restart(spa
->spa_dsl_pool
, dtl_max_txg
);
3970 (void) spa_vdev_exit(spa
, newrootvd
, dtl_max_txg
, 0);
3972 spa_history_log_internal(LOG_POOL_VDEV_ATTACH
, spa
, NULL
,
3973 "%s vdev=%s %s vdev=%s",
3974 replacing
&& newvd_isspare
? "spare in" :
3975 replacing
? "replace" : "attach", newvdpath
,
3976 replacing
? "for" : "to", oldvdpath
);
3978 spa_strfree(oldvdpath
);
3979 spa_strfree(newvdpath
);
3981 if (spa
->spa_bootfs
)
3982 spa_event_notify(spa
, newvd
, ESC_ZFS_BOOTFS_VDEV_ATTACH
);
3988 * Detach a device from a mirror or replacing vdev.
3989 * If 'replace_done' is specified, only detach if the parent
3990 * is a replacing vdev.
3993 spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
, int replace_done
)
3997 vdev_t
*rvd
= spa
->spa_root_vdev
;
3998 vdev_t
*vd
, *pvd
, *cvd
, *tvd
;
3999 boolean_t unspare
= B_FALSE
;
4000 uint64_t unspare_guid
;
4003 ASSERT(spa_writeable(spa
));
4005 txg
= spa_vdev_enter(spa
);
4007 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4010 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4012 if (!vd
->vdev_ops
->vdev_op_leaf
)
4013 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4015 pvd
= vd
->vdev_parent
;
4018 * If the parent/child relationship is not as expected, don't do it.
4019 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4020 * vdev that's replacing B with C. The user's intent in replacing
4021 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4022 * the replace by detaching C, the expected behavior is to end up
4023 * M(A,B). But suppose that right after deciding to detach C,
4024 * the replacement of B completes. We would have M(A,C), and then
4025 * ask to detach C, which would leave us with just A -- not what
4026 * the user wanted. To prevent this, we make sure that the
4027 * parent/child relationship hasn't changed -- in this example,
4028 * that C's parent is still the replacing vdev R.
4030 if (pvd
->vdev_guid
!= pguid
&& pguid
!= 0)
4031 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4034 * Only 'replacing' or 'spare' vdevs can be replaced.
4036 if (replace_done
&& pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4037 pvd
->vdev_ops
!= &vdev_spare_ops
)
4038 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4040 ASSERT(pvd
->vdev_ops
!= &vdev_spare_ops
||
4041 spa_version(spa
) >= SPA_VERSION_SPARES
);
4044 * Only mirror, replacing, and spare vdevs support detach.
4046 if (pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4047 pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4048 pvd
->vdev_ops
!= &vdev_spare_ops
)
4049 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4052 * If this device has the only valid copy of some data,
4053 * we cannot safely detach it.
4055 if (vdev_dtl_required(vd
))
4056 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4058 ASSERT(pvd
->vdev_children
>= 2);
4061 * If we are detaching the second disk from a replacing vdev, then
4062 * check to see if we changed the original vdev's path to have "/old"
4063 * at the end in spa_vdev_attach(). If so, undo that change now.
4065 if (pvd
->vdev_ops
== &vdev_replacing_ops
&& vd
->vdev_id
> 0 &&
4066 vd
->vdev_path
!= NULL
) {
4067 size_t len
= strlen(vd
->vdev_path
);
4069 for (int c
= 0; c
< pvd
->vdev_children
; c
++) {
4070 cvd
= pvd
->vdev_child
[c
];
4072 if (cvd
== vd
|| cvd
->vdev_path
== NULL
)
4075 if (strncmp(cvd
->vdev_path
, vd
->vdev_path
, len
) == 0 &&
4076 strcmp(cvd
->vdev_path
+ len
, "/old") == 0) {
4077 spa_strfree(cvd
->vdev_path
);
4078 cvd
->vdev_path
= spa_strdup(vd
->vdev_path
);
4085 * If we are detaching the original disk from a spare, then it implies
4086 * that the spare should become a real disk, and be removed from the
4087 * active spare list for the pool.
4089 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4091 pvd
->vdev_child
[pvd
->vdev_children
- 1]->vdev_isspare
)
4095 * Erase the disk labels so the disk can be used for other things.
4096 * This must be done after all other error cases are handled,
4097 * but before we disembowel vd (so we can still do I/O to it).
4098 * But if we can't do it, don't treat the error as fatal --
4099 * it may be that the unwritability of the disk is the reason
4100 * it's being detached!
4102 error
= vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4105 * Remove vd from its parent and compact the parent's children.
4107 vdev_remove_child(pvd
, vd
);
4108 vdev_compact_children(pvd
);
4111 * Remember one of the remaining children so we can get tvd below.
4113 cvd
= pvd
->vdev_child
[pvd
->vdev_children
- 1];
4116 * If we need to remove the remaining child from the list of hot spares,
4117 * do it now, marking the vdev as no longer a spare in the process.
4118 * We must do this before vdev_remove_parent(), because that can
4119 * change the GUID if it creates a new toplevel GUID. For a similar
4120 * reason, we must remove the spare now, in the same txg as the detach;
4121 * otherwise someone could attach a new sibling, change the GUID, and
4122 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
4125 ASSERT(cvd
->vdev_isspare
);
4126 spa_spare_remove(cvd
);
4127 unspare_guid
= cvd
->vdev_guid
;
4128 (void) spa_vdev_remove(spa
, unspare_guid
, B_TRUE
);
4129 cvd
->vdev_unspare
= B_TRUE
;
4133 * If the parent mirror/replacing vdev only has one child,
4134 * the parent is no longer needed. Remove it from the tree.
4136 if (pvd
->vdev_children
== 1) {
4137 if (pvd
->vdev_ops
== &vdev_spare_ops
)
4138 cvd
->vdev_unspare
= B_FALSE
;
4139 vdev_remove_parent(cvd
);
4140 cvd
->vdev_resilvering
= B_FALSE
;
4145 * We don't set tvd until now because the parent we just removed
4146 * may have been the previous top-level vdev.
4148 tvd
= cvd
->vdev_top
;
4149 ASSERT(tvd
->vdev_parent
== rvd
);
4152 * Reevaluate the parent vdev state.
4154 vdev_propagate_state(cvd
);
4157 * If the 'autoexpand' property is set on the pool then automatically
4158 * try to expand the size of the pool. For example if the device we
4159 * just detached was smaller than the others, it may be possible to
4160 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
4161 * first so that we can obtain the updated sizes of the leaf vdevs.
4163 if (spa
->spa_autoexpand
) {
4165 vdev_expand(tvd
, txg
);
4168 vdev_config_dirty(tvd
);
4171 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
4172 * vd->vdev_detached is set and free vd's DTL object in syncing context.
4173 * But first make sure we're not on any *other* txg's DTL list, to
4174 * prevent vd from being accessed after it's freed.
4176 vdpath
= spa_strdup(vd
->vdev_path
);
4177 for (int t
= 0; t
< TXG_SIZE
; t
++)
4178 (void) txg_list_remove_this(&tvd
->vdev_dtl_list
, vd
, t
);
4179 vd
->vdev_detached
= B_TRUE
;
4180 vdev_dirty(tvd
, VDD_DTL
, vd
, txg
);
4182 spa_event_notify(spa
, vd
, ESC_ZFS_VDEV_REMOVE
);
4184 /* hang on to the spa before we release the lock */
4185 spa_open_ref(spa
, FTAG
);
4187 error
= spa_vdev_exit(spa
, vd
, txg
, 0);
4189 spa_history_log_internal(LOG_POOL_VDEV_DETACH
, spa
, NULL
,
4191 spa_strfree(vdpath
);
4194 * If this was the removal of the original device in a hot spare vdev,
4195 * then we want to go through and remove the device from the hot spare
4196 * list of every other pool.
4199 spa_t
*altspa
= NULL
;
4201 mutex_enter(&spa_namespace_lock
);
4202 while ((altspa
= spa_next(altspa
)) != NULL
) {
4203 if (altspa
->spa_state
!= POOL_STATE_ACTIVE
||
4207 spa_open_ref(altspa
, FTAG
);
4208 mutex_exit(&spa_namespace_lock
);
4209 (void) spa_vdev_remove(altspa
, unspare_guid
, B_TRUE
);
4210 mutex_enter(&spa_namespace_lock
);
4211 spa_close(altspa
, FTAG
);
4213 mutex_exit(&spa_namespace_lock
);
4215 /* search the rest of the vdevs for spares to remove */
4216 spa_vdev_resilver_done(spa
);
4219 /* all done with the spa; OK to release */
4220 mutex_enter(&spa_namespace_lock
);
4221 spa_close(spa
, FTAG
);
4222 mutex_exit(&spa_namespace_lock
);
4228 * Split a set of devices from their mirrors, and create a new pool from them.
4231 spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
4232 nvlist_t
*props
, boolean_t exp
)
4235 uint64_t txg
, *glist
;
4237 uint_t c
, children
, lastlog
;
4238 nvlist_t
**child
, *nvl
, *tmp
;
4240 char *altroot
= NULL
;
4241 vdev_t
*rvd
, **vml
= NULL
; /* vdev modify list */
4242 boolean_t activate_slog
;
4244 ASSERT(spa_writeable(spa
));
4246 txg
= spa_vdev_enter(spa
);
4248 /* clear the log and flush everything up to now */
4249 activate_slog
= spa_passivate_log(spa
);
4250 (void) spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4251 error
= spa_offline_log(spa
);
4252 txg
= spa_vdev_config_enter(spa
);
4255 spa_activate_log(spa
);
4258 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4260 /* check new spa name before going any further */
4261 if (spa_lookup(newname
) != NULL
)
4262 return (spa_vdev_exit(spa
, NULL
, txg
, EEXIST
));
4265 * scan through all the children to ensure they're all mirrors
4267 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
) != 0 ||
4268 nvlist_lookup_nvlist_array(nvl
, ZPOOL_CONFIG_CHILDREN
, &child
,
4270 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4272 /* first, check to ensure we've got the right child count */
4273 rvd
= spa
->spa_root_vdev
;
4275 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
4276 vdev_t
*vd
= rvd
->vdev_child
[c
];
4278 /* don't count the holes & logs as children */
4279 if (vd
->vdev_islog
|| vd
->vdev_ishole
) {
4287 if (children
!= (lastlog
!= 0 ? lastlog
: rvd
->vdev_children
))
4288 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4290 /* next, ensure no spare or cache devices are part of the split */
4291 if (nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_SPARES
, &tmp
) == 0 ||
4292 nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_L2CACHE
, &tmp
) == 0)
4293 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4295 vml
= kmem_zalloc(children
* sizeof (vdev_t
*), KM_SLEEP
);
4296 glist
= kmem_zalloc(children
* sizeof (uint64_t), KM_SLEEP
);
4298 /* then, loop over each vdev and validate it */
4299 for (c
= 0; c
< children
; c
++) {
4300 uint64_t is_hole
= 0;
4302 (void) nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_IS_HOLE
,
4306 if (spa
->spa_root_vdev
->vdev_child
[c
]->vdev_ishole
||
4307 spa
->spa_root_vdev
->vdev_child
[c
]->vdev_islog
) {
4315 /* which disk is going to be split? */
4316 if (nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_GUID
,
4322 /* look it up in the spa */
4323 vml
[c
] = spa_lookup_by_guid(spa
, glist
[c
], B_FALSE
);
4324 if (vml
[c
] == NULL
) {
4329 /* make sure there's nothing stopping the split */
4330 if (vml
[c
]->vdev_parent
->vdev_ops
!= &vdev_mirror_ops
||
4331 vml
[c
]->vdev_islog
||
4332 vml
[c
]->vdev_ishole
||
4333 vml
[c
]->vdev_isspare
||
4334 vml
[c
]->vdev_isl2cache
||
4335 !vdev_writeable(vml
[c
]) ||
4336 vml
[c
]->vdev_children
!= 0 ||
4337 vml
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
||
4338 c
!= spa
->spa_root_vdev
->vdev_child
[c
]->vdev_id
) {
4343 if (vdev_dtl_required(vml
[c
])) {
4348 /* we need certain info from the top level */
4349 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_ARRAY
,
4350 vml
[c
]->vdev_top
->vdev_ms_array
) == 0);
4351 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_SHIFT
,
4352 vml
[c
]->vdev_top
->vdev_ms_shift
) == 0);
4353 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASIZE
,
4354 vml
[c
]->vdev_top
->vdev_asize
) == 0);
4355 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASHIFT
,
4356 vml
[c
]->vdev_top
->vdev_ashift
) == 0);
4360 kmem_free(vml
, children
* sizeof (vdev_t
*));
4361 kmem_free(glist
, children
* sizeof (uint64_t));
4362 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4365 /* stop writers from using the disks */
4366 for (c
= 0; c
< children
; c
++) {
4368 vml
[c
]->vdev_offline
= B_TRUE
;
4370 vdev_reopen(spa
->spa_root_vdev
);
4373 * Temporarily record the splitting vdevs in the spa config. This
4374 * will disappear once the config is regenerated.
4376 VERIFY(nvlist_alloc(&nvl
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4377 VERIFY(nvlist_add_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
4378 glist
, children
) == 0);
4379 kmem_free(glist
, children
* sizeof (uint64_t));
4381 mutex_enter(&spa
->spa_props_lock
);
4382 VERIFY(nvlist_add_nvlist(spa
->spa_config
, ZPOOL_CONFIG_SPLIT
,
4384 mutex_exit(&spa
->spa_props_lock
);
4385 spa
->spa_config_splitting
= nvl
;
4386 vdev_config_dirty(spa
->spa_root_vdev
);
4388 /* configure and create the new pool */
4389 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
, newname
) == 0);
4390 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
4391 exp
? POOL_STATE_EXPORTED
: POOL_STATE_ACTIVE
) == 0);
4392 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
4393 spa_version(spa
)) == 0);
4394 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
4395 spa
->spa_config_txg
) == 0);
4396 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
4397 spa_generate_guid(NULL
)) == 0);
4398 (void) nvlist_lookup_string(props
,
4399 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
4401 /* add the new pool to the namespace */
4402 newspa
= spa_add(newname
, config
, altroot
);
4403 newspa
->spa_config_txg
= spa
->spa_config_txg
;
4404 spa_set_log_state(newspa
, SPA_LOG_CLEAR
);
4406 /* release the spa config lock, retaining the namespace lock */
4407 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4409 if (zio_injection_enabled
)
4410 zio_handle_panic_injection(spa
, FTAG
, 1);
4412 spa_activate(newspa
, spa_mode_global
);
4413 spa_async_suspend(newspa
);
4415 /* create the new pool from the disks of the original pool */
4416 error
= spa_load(newspa
, SPA_LOAD_IMPORT
, SPA_IMPORT_ASSEMBLE
, B_TRUE
);
4420 /* if that worked, generate a real config for the new pool */
4421 if (newspa
->spa_root_vdev
!= NULL
) {
4422 VERIFY(nvlist_alloc(&newspa
->spa_config_splitting
,
4423 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4424 VERIFY(nvlist_add_uint64(newspa
->spa_config_splitting
,
4425 ZPOOL_CONFIG_SPLIT_GUID
, spa_guid(spa
)) == 0);
4426 spa_config_set(newspa
, spa_config_generate(newspa
, NULL
, -1ULL,
4431 if (props
!= NULL
) {
4432 spa_configfile_set(newspa
, props
, B_FALSE
);
4433 error
= spa_prop_set(newspa
, props
);
4438 /* flush everything */
4439 txg
= spa_vdev_config_enter(newspa
);
4440 vdev_config_dirty(newspa
->spa_root_vdev
);
4441 (void) spa_vdev_config_exit(newspa
, NULL
, txg
, 0, FTAG
);
4443 if (zio_injection_enabled
)
4444 zio_handle_panic_injection(spa
, FTAG
, 2);
4446 spa_async_resume(newspa
);
4448 /* finally, update the original pool's config */
4449 txg
= spa_vdev_config_enter(spa
);
4450 tx
= dmu_tx_create_dd(spa_get_dsl(spa
)->dp_mos_dir
);
4451 error
= dmu_tx_assign(tx
, TXG_WAIT
);
4454 for (c
= 0; c
< children
; c
++) {
4455 if (vml
[c
] != NULL
) {
4458 spa_history_log_internal(LOG_POOL_VDEV_DETACH
,
4464 vdev_config_dirty(spa
->spa_root_vdev
);
4465 spa
->spa_config_splitting
= NULL
;
4469 (void) spa_vdev_exit(spa
, NULL
, txg
, 0);
4471 if (zio_injection_enabled
)
4472 zio_handle_panic_injection(spa
, FTAG
, 3);
4474 /* split is complete; log a history record */
4475 spa_history_log_internal(LOG_POOL_SPLIT
, newspa
, NULL
,
4476 "split new pool %s from pool %s", newname
, spa_name(spa
));
4478 kmem_free(vml
, children
* sizeof (vdev_t
*));
4480 /* if we're not going to mount the filesystems in userland, export */
4482 error
= spa_export_common(newname
, POOL_STATE_EXPORTED
, NULL
,
4489 spa_deactivate(newspa
);
4492 txg
= spa_vdev_config_enter(spa
);
4494 /* re-online all offlined disks */
4495 for (c
= 0; c
< children
; c
++) {
4497 vml
[c
]->vdev_offline
= B_FALSE
;
4499 vdev_reopen(spa
->spa_root_vdev
);
4501 nvlist_free(spa
->spa_config_splitting
);
4502 spa
->spa_config_splitting
= NULL
;
4503 (void) spa_vdev_exit(spa
, NULL
, txg
, error
);
4505 kmem_free(vml
, children
* sizeof (vdev_t
*));
4510 spa_nvlist_lookup_by_guid(nvlist_t
**nvpp
, int count
, uint64_t target_guid
)
4512 for (int i
= 0; i
< count
; i
++) {
4515 VERIFY(nvlist_lookup_uint64(nvpp
[i
], ZPOOL_CONFIG_GUID
,
4518 if (guid
== target_guid
)
4526 spa_vdev_remove_aux(nvlist_t
*config
, char *name
, nvlist_t
**dev
, int count
,
4527 nvlist_t
*dev_to_remove
)
4529 nvlist_t
**newdev
= NULL
;
4532 newdev
= kmem_alloc((count
- 1) * sizeof (void *), KM_SLEEP
);
4534 for (int i
= 0, j
= 0; i
< count
; i
++) {
4535 if (dev
[i
] == dev_to_remove
)
4537 VERIFY(nvlist_dup(dev
[i
], &newdev
[j
++], KM_SLEEP
) == 0);
4540 VERIFY(nvlist_remove(config
, name
, DATA_TYPE_NVLIST_ARRAY
) == 0);
4541 VERIFY(nvlist_add_nvlist_array(config
, name
, newdev
, count
- 1) == 0);
4543 for (int i
= 0; i
< count
- 1; i
++)
4544 nvlist_free(newdev
[i
]);
4547 kmem_free(newdev
, (count
- 1) * sizeof (void *));
4551 * Evacuate the device.
4554 spa_vdev_remove_evacuate(spa_t
*spa
, vdev_t
*vd
)
4559 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
4560 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
4561 ASSERT(vd
== vd
->vdev_top
);
4564 * Evacuate the device. We don't hold the config lock as writer
4565 * since we need to do I/O but we do keep the
4566 * spa_namespace_lock held. Once this completes the device
4567 * should no longer have any blocks allocated on it.
4569 if (vd
->vdev_islog
) {
4570 if (vd
->vdev_stat
.vs_alloc
!= 0)
4571 error
= spa_offline_log(spa
);
4580 * The evacuation succeeded. Remove any remaining MOS metadata
4581 * associated with this vdev, and wait for these changes to sync.
4583 ASSERT3U(vd
->vdev_stat
.vs_alloc
, ==, 0);
4584 txg
= spa_vdev_config_enter(spa
);
4585 vd
->vdev_removing
= B_TRUE
;
4586 vdev_dirty(vd
, 0, NULL
, txg
);
4587 vdev_config_dirty(vd
);
4588 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4594 * Complete the removal by cleaning up the namespace.
4597 spa_vdev_remove_from_namespace(spa_t
*spa
, vdev_t
*vd
)
4599 vdev_t
*rvd
= spa
->spa_root_vdev
;
4600 uint64_t id
= vd
->vdev_id
;
4601 boolean_t last_vdev
= (id
== (rvd
->vdev_children
- 1));
4603 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
4604 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
4605 ASSERT(vd
== vd
->vdev_top
);
4608 * Only remove any devices which are empty.
4610 if (vd
->vdev_stat
.vs_alloc
!= 0)
4613 (void) vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4615 if (list_link_active(&vd
->vdev_state_dirty_node
))
4616 vdev_state_clean(vd
);
4617 if (list_link_active(&vd
->vdev_config_dirty_node
))
4618 vdev_config_clean(vd
);
4623 vdev_compact_children(rvd
);
4625 vd
= vdev_alloc_common(spa
, id
, 0, &vdev_hole_ops
);
4626 vdev_add_child(rvd
, vd
);
4628 vdev_config_dirty(rvd
);
4631 * Reassess the health of our root vdev.
4637 * Remove a device from the pool -
4639 * Removing a device from the vdev namespace requires several steps
4640 * and can take a significant amount of time. As a result we use
4641 * the spa_vdev_config_[enter/exit] functions which allow us to
4642 * grab and release the spa_config_lock while still holding the namespace
4643 * lock. During each step the configuration is synced out.
4647 * Remove a device from the pool. Currently, this supports removing only hot
4648 * spares, slogs, and level 2 ARC devices.
4651 spa_vdev_remove(spa_t
*spa
, uint64_t guid
, boolean_t unspare
)
4654 metaslab_group_t
*mg
;
4655 nvlist_t
**spares
, **l2cache
, *nv
;
4657 uint_t nspares
, nl2cache
;
4659 boolean_t locked
= MUTEX_HELD(&spa_namespace_lock
);
4661 ASSERT(spa_writeable(spa
));
4664 txg
= spa_vdev_enter(spa
);
4666 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4668 if (spa
->spa_spares
.sav_vdevs
!= NULL
&&
4669 nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
4670 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0 &&
4671 (nv
= spa_nvlist_lookup_by_guid(spares
, nspares
, guid
)) != NULL
) {
4673 * Only remove the hot spare if it's not currently in use
4676 if (vd
== NULL
|| unspare
) {
4677 spa_vdev_remove_aux(spa
->spa_spares
.sav_config
,
4678 ZPOOL_CONFIG_SPARES
, spares
, nspares
, nv
);
4679 spa_load_spares(spa
);
4680 spa
->spa_spares
.sav_sync
= B_TRUE
;
4684 } else if (spa
->spa_l2cache
.sav_vdevs
!= NULL
&&
4685 nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
4686 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0 &&
4687 (nv
= spa_nvlist_lookup_by_guid(l2cache
, nl2cache
, guid
)) != NULL
) {
4689 * Cache devices can always be removed.
4691 spa_vdev_remove_aux(spa
->spa_l2cache
.sav_config
,
4692 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
, nv
);
4693 spa_load_l2cache(spa
);
4694 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4695 } else if (vd
!= NULL
&& vd
->vdev_islog
) {
4697 ASSERT(vd
== vd
->vdev_top
);
4700 * XXX - Once we have bp-rewrite this should
4701 * become the common case.
4707 * Stop allocating from this vdev.
4709 metaslab_group_passivate(mg
);
4712 * Wait for the youngest allocations and frees to sync,
4713 * and then wait for the deferral of those frees to finish.
4715 spa_vdev_config_exit(spa
, NULL
,
4716 txg
+ TXG_CONCURRENT_STATES
+ TXG_DEFER_SIZE
, 0, FTAG
);
4719 * Attempt to evacuate the vdev.
4721 error
= spa_vdev_remove_evacuate(spa
, vd
);
4723 txg
= spa_vdev_config_enter(spa
);
4726 * If we couldn't evacuate the vdev, unwind.
4729 metaslab_group_activate(mg
);
4730 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4734 * Clean up the vdev namespace.
4736 spa_vdev_remove_from_namespace(spa
, vd
);
4738 } else if (vd
!= NULL
) {
4740 * Normal vdevs cannot be removed (yet).
4745 * There is no vdev of any kind with the specified guid.
4751 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4757 * Find any device that's done replacing, or a vdev marked 'unspare' that's
4758 * current spared, so we can detach it.
4761 spa_vdev_resilver_done_hunt(vdev_t
*vd
)
4763 vdev_t
*newvd
, *oldvd
;
4765 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
4766 oldvd
= spa_vdev_resilver_done_hunt(vd
->vdev_child
[c
]);
4772 * Check for a completed replacement. We always consider the first
4773 * vdev in the list to be the oldest vdev, and the last one to be
4774 * the newest (see spa_vdev_attach() for how that works). In
4775 * the case where the newest vdev is faulted, we will not automatically
4776 * remove it after a resilver completes. This is OK as it will require
4777 * user intervention to determine which disk the admin wishes to keep.
4779 if (vd
->vdev_ops
== &vdev_replacing_ops
) {
4780 ASSERT(vd
->vdev_children
> 1);
4782 newvd
= vd
->vdev_child
[vd
->vdev_children
- 1];
4783 oldvd
= vd
->vdev_child
[0];
4785 if (vdev_dtl_empty(newvd
, DTL_MISSING
) &&
4786 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
4787 !vdev_dtl_required(oldvd
))
4792 * Check for a completed resilver with the 'unspare' flag set.
4794 if (vd
->vdev_ops
== &vdev_spare_ops
) {
4795 vdev_t
*first
= vd
->vdev_child
[0];
4796 vdev_t
*last
= vd
->vdev_child
[vd
->vdev_children
- 1];
4798 if (last
->vdev_unspare
) {
4801 } else if (first
->vdev_unspare
) {
4808 if (oldvd
!= NULL
&&
4809 vdev_dtl_empty(newvd
, DTL_MISSING
) &&
4810 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
4811 !vdev_dtl_required(oldvd
))
4815 * If there are more than two spares attached to a disk,
4816 * and those spares are not required, then we want to
4817 * attempt to free them up now so that they can be used
4818 * by other pools. Once we're back down to a single
4819 * disk+spare, we stop removing them.
4821 if (vd
->vdev_children
> 2) {
4822 newvd
= vd
->vdev_child
[1];
4824 if (newvd
->vdev_isspare
&& last
->vdev_isspare
&&
4825 vdev_dtl_empty(last
, DTL_MISSING
) &&
4826 vdev_dtl_empty(last
, DTL_OUTAGE
) &&
4827 !vdev_dtl_required(newvd
))
4836 spa_vdev_resilver_done(spa_t
*spa
)
4838 vdev_t
*vd
, *pvd
, *ppvd
;
4839 uint64_t guid
, sguid
, pguid
, ppguid
;
4841 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4843 while ((vd
= spa_vdev_resilver_done_hunt(spa
->spa_root_vdev
)) != NULL
) {
4844 pvd
= vd
->vdev_parent
;
4845 ppvd
= pvd
->vdev_parent
;
4846 guid
= vd
->vdev_guid
;
4847 pguid
= pvd
->vdev_guid
;
4848 ppguid
= ppvd
->vdev_guid
;
4851 * If we have just finished replacing a hot spared device, then
4852 * we need to detach the parent's first child (the original hot
4855 if (ppvd
->vdev_ops
== &vdev_spare_ops
&& pvd
->vdev_id
== 0 &&
4856 ppvd
->vdev_children
== 2) {
4857 ASSERT(pvd
->vdev_ops
== &vdev_replacing_ops
);
4858 sguid
= ppvd
->vdev_child
[1]->vdev_guid
;
4860 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4861 if (spa_vdev_detach(spa
, guid
, pguid
, B_TRUE
) != 0)
4863 if (sguid
&& spa_vdev_detach(spa
, sguid
, ppguid
, B_TRUE
) != 0)
4865 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4868 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4872 * Update the stored path or FRU for this vdev.
4875 spa_vdev_set_common(spa_t
*spa
, uint64_t guid
, const char *value
,
4879 boolean_t sync
= B_FALSE
;
4881 ASSERT(spa_writeable(spa
));
4883 spa_vdev_state_enter(spa
, SCL_ALL
);
4885 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
4886 return (spa_vdev_state_exit(spa
, NULL
, ENOENT
));
4888 if (!vd
->vdev_ops
->vdev_op_leaf
)
4889 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
4892 if (strcmp(value
, vd
->vdev_path
) != 0) {
4893 spa_strfree(vd
->vdev_path
);
4894 vd
->vdev_path
= spa_strdup(value
);
4898 if (vd
->vdev_fru
== NULL
) {
4899 vd
->vdev_fru
= spa_strdup(value
);
4901 } else if (strcmp(value
, vd
->vdev_fru
) != 0) {
4902 spa_strfree(vd
->vdev_fru
);
4903 vd
->vdev_fru
= spa_strdup(value
);
4908 return (spa_vdev_state_exit(spa
, sync
? vd
: NULL
, 0));
4912 spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
)
4914 return (spa_vdev_set_common(spa
, guid
, newpath
, B_TRUE
));
4918 spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
)
4920 return (spa_vdev_set_common(spa
, guid
, newfru
, B_FALSE
));
4924 * ==========================================================================
4926 * ==========================================================================
4930 spa_scan_stop(spa_t
*spa
)
4932 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
4933 if (dsl_scan_resilvering(spa
->spa_dsl_pool
))
4935 return (dsl_scan_cancel(spa
->spa_dsl_pool
));
4939 spa_scan(spa_t
*spa
, pool_scan_func_t func
)
4941 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
4943 if (func
>= POOL_SCAN_FUNCS
|| func
== POOL_SCAN_NONE
)
4947 * If a resilver was requested, but there is no DTL on a
4948 * writeable leaf device, we have nothing to do.
4950 if (func
== POOL_SCAN_RESILVER
&&
4951 !vdev_resilver_needed(spa
->spa_root_vdev
, NULL
, NULL
)) {
4952 spa_async_request(spa
, SPA_ASYNC_RESILVER_DONE
);
4956 return (dsl_scan(spa
->spa_dsl_pool
, func
));
4960 * ==========================================================================
4961 * SPA async task processing
4962 * ==========================================================================
4966 spa_async_remove(spa_t
*spa
, vdev_t
*vd
)
4968 if (vd
->vdev_remove_wanted
) {
4969 vd
->vdev_remove_wanted
= B_FALSE
;
4970 vd
->vdev_delayed_close
= B_FALSE
;
4971 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_REMOVED
, VDEV_AUX_NONE
);
4974 * We want to clear the stats, but we don't want to do a full
4975 * vdev_clear() as that will cause us to throw away
4976 * degraded/faulted state as well as attempt to reopen the
4977 * device, all of which is a waste.
4979 vd
->vdev_stat
.vs_read_errors
= 0;
4980 vd
->vdev_stat
.vs_write_errors
= 0;
4981 vd
->vdev_stat
.vs_checksum_errors
= 0;
4983 vdev_state_dirty(vd
->vdev_top
);
4986 for (int c
= 0; c
< vd
->vdev_children
; c
++)
4987 spa_async_remove(spa
, vd
->vdev_child
[c
]);
4991 spa_async_probe(spa_t
*spa
, vdev_t
*vd
)
4993 if (vd
->vdev_probe_wanted
) {
4994 vd
->vdev_probe_wanted
= B_FALSE
;
4995 vdev_reopen(vd
); /* vdev_open() does the actual probe */
4998 for (int c
= 0; c
< vd
->vdev_children
; c
++)
4999 spa_async_probe(spa
, vd
->vdev_child
[c
]);
5003 spa_async_autoexpand(spa_t
*spa
, vdev_t
*vd
)
5009 if (!spa
->spa_autoexpand
)
5012 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
5013 vdev_t
*cvd
= vd
->vdev_child
[c
];
5014 spa_async_autoexpand(spa
, cvd
);
5017 if (!vd
->vdev_ops
->vdev_op_leaf
|| vd
->vdev_physpath
== NULL
)
5020 physpath
= kmem_zalloc(MAXPATHLEN
, KM_SLEEP
);
5021 (void) snprintf(physpath
, MAXPATHLEN
, "/devices%s", vd
->vdev_physpath
);
5023 VERIFY(nvlist_alloc(&attr
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5024 VERIFY(nvlist_add_string(attr
, DEV_PHYS_PATH
, physpath
) == 0);
5026 (void) ddi_log_sysevent(zfs_dip
, SUNW_VENDOR
, EC_DEV_STATUS
,
5027 ESC_DEV_DLE
, attr
, &eid
, DDI_SLEEP
);
5030 kmem_free(physpath
, MAXPATHLEN
);
5034 spa_async_thread(spa_t
*spa
)
5038 ASSERT(spa
->spa_sync_on
);
5040 mutex_enter(&spa
->spa_async_lock
);
5041 tasks
= spa
->spa_async_tasks
;
5042 spa
->spa_async_tasks
= 0;
5043 mutex_exit(&spa
->spa_async_lock
);
5046 * See if the config needs to be updated.
5048 if (tasks
& SPA_ASYNC_CONFIG_UPDATE
) {
5049 uint64_t old_space
, new_space
;
5051 mutex_enter(&spa_namespace_lock
);
5052 old_space
= metaslab_class_get_space(spa_normal_class(spa
));
5053 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
5054 new_space
= metaslab_class_get_space(spa_normal_class(spa
));
5055 mutex_exit(&spa_namespace_lock
);
5058 * If the pool grew as a result of the config update,
5059 * then log an internal history event.
5061 if (new_space
!= old_space
) {
5062 spa_history_log_internal(LOG_POOL_VDEV_ONLINE
,
5064 "pool '%s' size: %llu(+%llu)",
5065 spa_name(spa
), new_space
, new_space
- old_space
);
5070 * See if any devices need to be marked REMOVED.
5072 if (tasks
& SPA_ASYNC_REMOVE
) {
5073 spa_vdev_state_enter(spa
, SCL_NONE
);
5074 spa_async_remove(spa
, spa
->spa_root_vdev
);
5075 for (int i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
5076 spa_async_remove(spa
, spa
->spa_l2cache
.sav_vdevs
[i
]);
5077 for (int i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
5078 spa_async_remove(spa
, spa
->spa_spares
.sav_vdevs
[i
]);
5079 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5082 if ((tasks
& SPA_ASYNC_AUTOEXPAND
) && !spa_suspended(spa
)) {
5083 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5084 spa_async_autoexpand(spa
, spa
->spa_root_vdev
);
5085 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5089 * See if any devices need to be probed.
5091 if (tasks
& SPA_ASYNC_PROBE
) {
5092 spa_vdev_state_enter(spa
, SCL_NONE
);
5093 spa_async_probe(spa
, spa
->spa_root_vdev
);
5094 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5098 * If any devices are done replacing, detach them.
5100 if (tasks
& SPA_ASYNC_RESILVER_DONE
)
5101 spa_vdev_resilver_done(spa
);
5104 * Kick off a resilver.
5106 if (tasks
& SPA_ASYNC_RESILVER
)
5107 dsl_resilver_restart(spa
->spa_dsl_pool
, 0);
5110 * Let the world know that we're done.
5112 mutex_enter(&spa
->spa_async_lock
);
5113 spa
->spa_async_thread
= NULL
;
5114 cv_broadcast(&spa
->spa_async_cv
);
5115 mutex_exit(&spa
->spa_async_lock
);
5120 spa_async_suspend(spa_t
*spa
)
5122 mutex_enter(&spa
->spa_async_lock
);
5123 spa
->spa_async_suspended
++;
5124 while (spa
->spa_async_thread
!= NULL
)
5125 cv_wait(&spa
->spa_async_cv
, &spa
->spa_async_lock
);
5126 mutex_exit(&spa
->spa_async_lock
);
5130 spa_async_resume(spa_t
*spa
)
5132 mutex_enter(&spa
->spa_async_lock
);
5133 ASSERT(spa
->spa_async_suspended
!= 0);
5134 spa
->spa_async_suspended
--;
5135 mutex_exit(&spa
->spa_async_lock
);
5139 spa_async_dispatch(spa_t
*spa
)
5141 mutex_enter(&spa
->spa_async_lock
);
5142 if (spa
->spa_async_tasks
&& !spa
->spa_async_suspended
&&
5143 spa
->spa_async_thread
== NULL
&&
5144 rootdir
!= NULL
&& !vn_is_readonly(rootdir
))
5145 spa
->spa_async_thread
= thread_create(NULL
, 0,
5146 spa_async_thread
, spa
, 0, &p0
, TS_RUN
, maxclsyspri
);
5147 mutex_exit(&spa
->spa_async_lock
);
5151 spa_async_request(spa_t
*spa
, int task
)
5153 zfs_dbgmsg("spa=%s async request task=%u", spa
->spa_name
, task
);
5154 mutex_enter(&spa
->spa_async_lock
);
5155 spa
->spa_async_tasks
|= task
;
5156 mutex_exit(&spa
->spa_async_lock
);
5160 * ==========================================================================
5161 * SPA syncing routines
5162 * ==========================================================================
5166 bpobj_enqueue_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5169 bpobj_enqueue(bpo
, bp
, tx
);
5174 spa_free_sync_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5178 zio_nowait(zio_free_sync(zio
, zio
->io_spa
, dmu_tx_get_txg(tx
), bp
,
5184 spa_sync_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
*nv
, dmu_tx_t
*tx
)
5186 char *packed
= NULL
;
5191 VERIFY(nvlist_size(nv
, &nvsize
, NV_ENCODE_XDR
) == 0);
5194 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
5195 * information. This avoids the dbuf_will_dirty() path and
5196 * saves us a pre-read to get data we don't actually care about.
5198 bufsize
= P2ROUNDUP(nvsize
, SPA_CONFIG_BLOCKSIZE
);
5199 packed
= kmem_alloc(bufsize
, KM_SLEEP
);
5201 VERIFY(nvlist_pack(nv
, &packed
, &nvsize
, NV_ENCODE_XDR
,
5203 bzero(packed
+ nvsize
, bufsize
- nvsize
);
5205 dmu_write(spa
->spa_meta_objset
, obj
, 0, bufsize
, packed
, tx
);
5207 kmem_free(packed
, bufsize
);
5209 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
5210 dmu_buf_will_dirty(db
, tx
);
5211 *(uint64_t *)db
->db_data
= nvsize
;
5212 dmu_buf_rele(db
, FTAG
);
5216 spa_sync_aux_dev(spa_t
*spa
, spa_aux_vdev_t
*sav
, dmu_tx_t
*tx
,
5217 const char *config
, const char *entry
)
5227 * Update the MOS nvlist describing the list of available devices.
5228 * spa_validate_aux() will have already made sure this nvlist is
5229 * valid and the vdevs are labeled appropriately.
5231 if (sav
->sav_object
== 0) {
5232 sav
->sav_object
= dmu_object_alloc(spa
->spa_meta_objset
,
5233 DMU_OT_PACKED_NVLIST
, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE
,
5234 sizeof (uint64_t), tx
);
5235 VERIFY(zap_update(spa
->spa_meta_objset
,
5236 DMU_POOL_DIRECTORY_OBJECT
, entry
, sizeof (uint64_t), 1,
5237 &sav
->sav_object
, tx
) == 0);
5240 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5241 if (sav
->sav_count
== 0) {
5242 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, NULL
, 0) == 0);
5244 list
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
5245 for (i
= 0; i
< sav
->sav_count
; i
++)
5246 list
[i
] = vdev_config_generate(spa
, sav
->sav_vdevs
[i
],
5247 B_FALSE
, VDEV_CONFIG_L2CACHE
);
5248 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, list
,
5249 sav
->sav_count
) == 0);
5250 for (i
= 0; i
< sav
->sav_count
; i
++)
5251 nvlist_free(list
[i
]);
5252 kmem_free(list
, sav
->sav_count
* sizeof (void *));
5255 spa_sync_nvlist(spa
, sav
->sav_object
, nvroot
, tx
);
5256 nvlist_free(nvroot
);
5258 sav
->sav_sync
= B_FALSE
;
5262 spa_sync_config_object(spa_t
*spa
, dmu_tx_t
*tx
)
5266 if (list_is_empty(&spa
->spa_config_dirty_list
))
5269 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5271 config
= spa_config_generate(spa
, spa
->spa_root_vdev
,
5272 dmu_tx_get_txg(tx
), B_FALSE
);
5274 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5276 if (spa
->spa_config_syncing
)
5277 nvlist_free(spa
->spa_config_syncing
);
5278 spa
->spa_config_syncing
= config
;
5280 spa_sync_nvlist(spa
, spa
->spa_config_object
, config
, tx
);
5284 * Set zpool properties.
5287 spa_sync_props(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
5290 objset_t
*mos
= spa
->spa_meta_objset
;
5291 nvlist_t
*nvp
= arg2
;
5296 const char *propname
;
5297 zprop_type_t proptype
;
5299 mutex_enter(&spa
->spa_props_lock
);
5302 while ((elem
= nvlist_next_nvpair(nvp
, elem
))) {
5303 switch (prop
= zpool_name_to_prop(nvpair_name(elem
))) {
5304 case ZPOOL_PROP_VERSION
:
5306 * Only set version for non-zpool-creation cases
5307 * (set/import). spa_create() needs special care
5308 * for version setting.
5310 if (tx
->tx_txg
!= TXG_INITIAL
) {
5311 VERIFY(nvpair_value_uint64(elem
,
5313 ASSERT(intval
<= SPA_VERSION
);
5314 ASSERT(intval
>= spa_version(spa
));
5315 spa
->spa_uberblock
.ub_version
= intval
;
5316 vdev_config_dirty(spa
->spa_root_vdev
);
5320 case ZPOOL_PROP_ALTROOT
:
5322 * 'altroot' is a non-persistent property. It should
5323 * have been set temporarily at creation or import time.
5325 ASSERT(spa
->spa_root
!= NULL
);
5328 case ZPOOL_PROP_READONLY
:
5329 case ZPOOL_PROP_CACHEFILE
:
5331 * 'readonly' and 'cachefile' are also non-persisitent
5337 * Set pool property values in the poolprops mos object.
5339 if (spa
->spa_pool_props_object
== 0) {
5340 VERIFY((spa
->spa_pool_props_object
=
5341 zap_create(mos
, DMU_OT_POOL_PROPS
,
5342 DMU_OT_NONE
, 0, tx
)) > 0);
5344 VERIFY(zap_update(mos
,
5345 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_PROPS
,
5346 8, 1, &spa
->spa_pool_props_object
, tx
)
5350 /* normalize the property name */
5351 propname
= zpool_prop_to_name(prop
);
5352 proptype
= zpool_prop_get_type(prop
);
5354 if (nvpair_type(elem
) == DATA_TYPE_STRING
) {
5355 ASSERT(proptype
== PROP_TYPE_STRING
);
5356 VERIFY(nvpair_value_string(elem
, &strval
) == 0);
5357 VERIFY(zap_update(mos
,
5358 spa
->spa_pool_props_object
, propname
,
5359 1, strlen(strval
) + 1, strval
, tx
) == 0);
5361 } else if (nvpair_type(elem
) == DATA_TYPE_UINT64
) {
5362 VERIFY(nvpair_value_uint64(elem
, &intval
) == 0);
5364 if (proptype
== PROP_TYPE_INDEX
) {
5366 VERIFY(zpool_prop_index_to_string(
5367 prop
, intval
, &unused
) == 0);
5369 VERIFY(zap_update(mos
,
5370 spa
->spa_pool_props_object
, propname
,
5371 8, 1, &intval
, tx
) == 0);
5373 ASSERT(0); /* not allowed */
5377 case ZPOOL_PROP_DELEGATION
:
5378 spa
->spa_delegation
= intval
;
5380 case ZPOOL_PROP_BOOTFS
:
5381 spa
->spa_bootfs
= intval
;
5383 case ZPOOL_PROP_FAILUREMODE
:
5384 spa
->spa_failmode
= intval
;
5386 case ZPOOL_PROP_AUTOEXPAND
:
5387 spa
->spa_autoexpand
= intval
;
5388 if (tx
->tx_txg
!= TXG_INITIAL
)
5389 spa_async_request(spa
,
5390 SPA_ASYNC_AUTOEXPAND
);
5392 case ZPOOL_PROP_DEDUPDITTO
:
5393 spa
->spa_dedup_ditto
= intval
;
5400 /* log internal history if this is not a zpool create */
5401 if (spa_version(spa
) >= SPA_VERSION_ZPOOL_HISTORY
&&
5402 tx
->tx_txg
!= TXG_INITIAL
) {
5403 spa_history_log_internal(LOG_POOL_PROPSET
,
5404 spa
, tx
, "%s %lld %s",
5405 nvpair_name(elem
), intval
, spa_name(spa
));
5409 mutex_exit(&spa
->spa_props_lock
);
5413 * Perform one-time upgrade on-disk changes. spa_version() does not
5414 * reflect the new version this txg, so there must be no changes this
5415 * txg to anything that the upgrade code depends on after it executes.
5416 * Therefore this must be called after dsl_pool_sync() does the sync
5420 spa_sync_upgrades(spa_t
*spa
, dmu_tx_t
*tx
)
5422 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5424 ASSERT(spa
->spa_sync_pass
== 1);
5426 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_ORIGIN
&&
5427 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_ORIGIN
) {
5428 dsl_pool_create_origin(dp
, tx
);
5430 /* Keeping the origin open increases spa_minref */
5431 spa
->spa_minref
+= 3;
5434 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_NEXT_CLONES
&&
5435 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_NEXT_CLONES
) {
5436 dsl_pool_upgrade_clones(dp
, tx
);
5439 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_DIR_CLONES
&&
5440 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_DIR_CLONES
) {
5441 dsl_pool_upgrade_dir_clones(dp
, tx
);
5443 /* Keeping the freedir open increases spa_minref */
5444 spa
->spa_minref
+= 3;
5449 * Sync the specified transaction group. New blocks may be dirtied as
5450 * part of the process, so we iterate until it converges.
5453 spa_sync(spa_t
*spa
, uint64_t txg
)
5455 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5456 objset_t
*mos
= spa
->spa_meta_objset
;
5457 bpobj_t
*defer_bpo
= &spa
->spa_deferred_bpobj
;
5458 bplist_t
*free_bpl
= &spa
->spa_free_bplist
[txg
& TXG_MASK
];
5459 vdev_t
*rvd
= spa
->spa_root_vdev
;
5464 VERIFY(spa_writeable(spa
));
5467 * Lock out configuration changes.
5469 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5471 spa
->spa_syncing_txg
= txg
;
5472 spa
->spa_sync_pass
= 0;
5475 * If there are any pending vdev state changes, convert them
5476 * into config changes that go out with this transaction group.
5478 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5479 while (list_head(&spa
->spa_state_dirty_list
) != NULL
) {
5481 * We need the write lock here because, for aux vdevs,
5482 * calling vdev_config_dirty() modifies sav_config.
5483 * This is ugly and will become unnecessary when we
5484 * eliminate the aux vdev wart by integrating all vdevs
5485 * into the root vdev tree.
5487 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5488 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_WRITER
);
5489 while ((vd
= list_head(&spa
->spa_state_dirty_list
)) != NULL
) {
5490 vdev_state_clean(vd
);
5491 vdev_config_dirty(vd
);
5493 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5494 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_READER
);
5496 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5498 tx
= dmu_tx_create_assigned(dp
, txg
);
5501 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
5502 * set spa_deflate if we have no raid-z vdevs.
5504 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_RAIDZ_DEFLATE
&&
5505 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
5508 for (i
= 0; i
< rvd
->vdev_children
; i
++) {
5509 vd
= rvd
->vdev_child
[i
];
5510 if (vd
->vdev_deflate_ratio
!= SPA_MINBLOCKSIZE
)
5513 if (i
== rvd
->vdev_children
) {
5514 spa
->spa_deflate
= TRUE
;
5515 VERIFY(0 == zap_add(spa
->spa_meta_objset
,
5516 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
5517 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
));
5522 * If anything has changed in this txg, or if someone is waiting
5523 * for this txg to sync (eg, spa_vdev_remove()), push the
5524 * deferred frees from the previous txg. If not, leave them
5525 * alone so that we don't generate work on an otherwise idle
5528 if (!txg_list_empty(&dp
->dp_dirty_datasets
, txg
) ||
5529 !txg_list_empty(&dp
->dp_dirty_dirs
, txg
) ||
5530 !txg_list_empty(&dp
->dp_sync_tasks
, txg
) ||
5531 ((dsl_scan_active(dp
->dp_scan
) ||
5532 txg_sync_waiting(dp
)) && !spa_shutting_down(spa
))) {
5533 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
5534 VERIFY3U(bpobj_iterate(defer_bpo
,
5535 spa_free_sync_cb
, zio
, tx
), ==, 0);
5536 VERIFY3U(zio_wait(zio
), ==, 0);
5540 * Iterate to convergence.
5543 int pass
= ++spa
->spa_sync_pass
;
5545 spa_sync_config_object(spa
, tx
);
5546 spa_sync_aux_dev(spa
, &spa
->spa_spares
, tx
,
5547 ZPOOL_CONFIG_SPARES
, DMU_POOL_SPARES
);
5548 spa_sync_aux_dev(spa
, &spa
->spa_l2cache
, tx
,
5549 ZPOOL_CONFIG_L2CACHE
, DMU_POOL_L2CACHE
);
5550 spa_errlog_sync(spa
, txg
);
5551 dsl_pool_sync(dp
, txg
);
5553 if (pass
<= SYNC_PASS_DEFERRED_FREE
) {
5554 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
5555 bplist_iterate(free_bpl
, spa_free_sync_cb
,
5557 VERIFY(zio_wait(zio
) == 0);
5559 bplist_iterate(free_bpl
, bpobj_enqueue_cb
,
5564 dsl_scan_sync(dp
, tx
);
5566 while (vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, txg
))
5570 spa_sync_upgrades(spa
, tx
);
5572 } while (dmu_objset_is_dirty(mos
, txg
));
5575 * Rewrite the vdev configuration (which includes the uberblock)
5576 * to commit the transaction group.
5578 * If there are no dirty vdevs, we sync the uberblock to a few
5579 * random top-level vdevs that are known to be visible in the
5580 * config cache (see spa_vdev_add() for a complete description).
5581 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
5585 * We hold SCL_STATE to prevent vdev open/close/etc.
5586 * while we're attempting to write the vdev labels.
5588 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5590 if (list_is_empty(&spa
->spa_config_dirty_list
)) {
5591 vdev_t
*svd
[SPA_DVAS_PER_BP
];
5593 int children
= rvd
->vdev_children
;
5594 int c0
= spa_get_random(children
);
5596 for (int c
= 0; c
< children
; c
++) {
5597 vd
= rvd
->vdev_child
[(c0
+ c
) % children
];
5598 if (vd
->vdev_ms_array
== 0 || vd
->vdev_islog
)
5600 svd
[svdcount
++] = vd
;
5601 if (svdcount
== SPA_DVAS_PER_BP
)
5604 error
= vdev_config_sync(svd
, svdcount
, txg
, B_FALSE
);
5606 error
= vdev_config_sync(svd
, svdcount
, txg
,
5609 error
= vdev_config_sync(rvd
->vdev_child
,
5610 rvd
->vdev_children
, txg
, B_FALSE
);
5612 error
= vdev_config_sync(rvd
->vdev_child
,
5613 rvd
->vdev_children
, txg
, B_TRUE
);
5616 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5620 zio_suspend(spa
, NULL
);
5621 zio_resume_wait(spa
);
5626 * Clear the dirty config list.
5628 while ((vd
= list_head(&spa
->spa_config_dirty_list
)) != NULL
)
5629 vdev_config_clean(vd
);
5632 * Now that the new config has synced transactionally,
5633 * let it become visible to the config cache.
5635 if (spa
->spa_config_syncing
!= NULL
) {
5636 spa_config_set(spa
, spa
->spa_config_syncing
);
5637 spa
->spa_config_txg
= txg
;
5638 spa
->spa_config_syncing
= NULL
;
5641 spa
->spa_ubsync
= spa
->spa_uberblock
;
5643 dsl_pool_sync_done(dp
, txg
);
5646 * Update usable space statistics.
5648 while (vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, TXG_CLEAN(txg
)))
5649 vdev_sync_done(vd
, txg
);
5651 spa_update_dspace(spa
);
5654 * It had better be the case that we didn't dirty anything
5655 * since vdev_config_sync().
5657 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
, txg
));
5658 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
5659 ASSERT(txg_list_empty(&spa
->spa_vdev_txg_list
, txg
));
5661 spa
->spa_sync_pass
= 0;
5663 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5665 spa_handle_ignored_writes(spa
);
5668 * If any async tasks have been requested, kick them off.
5670 spa_async_dispatch(spa
);
5674 * Sync all pools. We don't want to hold the namespace lock across these
5675 * operations, so we take a reference on the spa_t and drop the lock during the
5679 spa_sync_allpools(void)
5682 mutex_enter(&spa_namespace_lock
);
5683 while ((spa
= spa_next(spa
)) != NULL
) {
5684 if (spa_state(spa
) != POOL_STATE_ACTIVE
||
5685 !spa_writeable(spa
) || spa_suspended(spa
))
5687 spa_open_ref(spa
, FTAG
);
5688 mutex_exit(&spa_namespace_lock
);
5689 txg_wait_synced(spa_get_dsl(spa
), 0);
5690 mutex_enter(&spa_namespace_lock
);
5691 spa_close(spa
, FTAG
);
5693 mutex_exit(&spa_namespace_lock
);
5697 * ==========================================================================
5698 * Miscellaneous routines
5699 * ==========================================================================
5703 * Remove all pools in the system.
5711 * Remove all cached state. All pools should be closed now,
5712 * so every spa in the AVL tree should be unreferenced.
5714 mutex_enter(&spa_namespace_lock
);
5715 while ((spa
= spa_next(NULL
)) != NULL
) {
5717 * Stop async tasks. The async thread may need to detach
5718 * a device that's been replaced, which requires grabbing
5719 * spa_namespace_lock, so we must drop it here.
5721 spa_open_ref(spa
, FTAG
);
5722 mutex_exit(&spa_namespace_lock
);
5723 spa_async_suspend(spa
);
5724 mutex_enter(&spa_namespace_lock
);
5725 spa_close(spa
, FTAG
);
5727 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
5729 spa_deactivate(spa
);
5733 mutex_exit(&spa_namespace_lock
);
5737 spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
, boolean_t aux
)
5742 if ((vd
= vdev_lookup_by_guid(spa
->spa_root_vdev
, guid
)) != NULL
)
5746 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
5747 vd
= spa
->spa_l2cache
.sav_vdevs
[i
];
5748 if (vd
->vdev_guid
== guid
)
5752 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
5753 vd
= spa
->spa_spares
.sav_vdevs
[i
];
5754 if (vd
->vdev_guid
== guid
)
5763 spa_upgrade(spa_t
*spa
, uint64_t version
)
5765 ASSERT(spa_writeable(spa
));
5767 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5770 * This should only be called for a non-faulted pool, and since a
5771 * future version would result in an unopenable pool, this shouldn't be
5774 ASSERT(spa
->spa_uberblock
.ub_version
<= SPA_VERSION
);
5775 ASSERT(version
>= spa
->spa_uberblock
.ub_version
);
5777 spa
->spa_uberblock
.ub_version
= version
;
5778 vdev_config_dirty(spa
->spa_root_vdev
);
5780 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5782 txg_wait_synced(spa_get_dsl(spa
), 0);
5786 spa_has_spare(spa_t
*spa
, uint64_t guid
)
5790 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
5792 for (i
= 0; i
< sav
->sav_count
; i
++)
5793 if (sav
->sav_vdevs
[i
]->vdev_guid
== guid
)
5796 for (i
= 0; i
< sav
->sav_npending
; i
++) {
5797 if (nvlist_lookup_uint64(sav
->sav_pending
[i
], ZPOOL_CONFIG_GUID
,
5798 &spareguid
) == 0 && spareguid
== guid
)
5806 * Check if a pool has an active shared spare device.
5807 * Note: reference count of an active spare is 2, as a spare and as a replace
5810 spa_has_active_shared_spare(spa_t
*spa
)
5814 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
5816 for (i
= 0; i
< sav
->sav_count
; i
++) {
5817 if (spa_spare_exists(sav
->sav_vdevs
[i
]->vdev_guid
, &pool
,
5818 &refcnt
) && pool
!= 0ULL && pool
== spa_guid(spa
) &&
5827 * Post a sysevent corresponding to the given event. The 'name' must be one of
5828 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
5829 * filled in from the spa and (optionally) the vdev. This doesn't do anything
5830 * in the userland libzpool, as we don't want consumers to misinterpret ztest
5831 * or zdb as real changes.
5834 spa_event_notify(spa_t
*spa
, vdev_t
*vd
, const char *name
)
5838 sysevent_attr_list_t
*attr
= NULL
;
5839 sysevent_value_t value
;
5842 ev
= sysevent_alloc(EC_ZFS
, (char *)name
, SUNW_KERN_PUB
"zfs",
5845 value
.value_type
= SE_DATA_TYPE_STRING
;
5846 value
.value
.sv_string
= spa_name(spa
);
5847 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_NAME
, &value
, SE_SLEEP
) != 0)
5850 value
.value_type
= SE_DATA_TYPE_UINT64
;
5851 value
.value
.sv_uint64
= spa_guid(spa
);
5852 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_GUID
, &value
, SE_SLEEP
) != 0)
5856 value
.value_type
= SE_DATA_TYPE_UINT64
;
5857 value
.value
.sv_uint64
= vd
->vdev_guid
;
5858 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_GUID
, &value
,
5862 if (vd
->vdev_path
) {
5863 value
.value_type
= SE_DATA_TYPE_STRING
;
5864 value
.value
.sv_string
= vd
->vdev_path
;
5865 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_PATH
,
5866 &value
, SE_SLEEP
) != 0)
5871 if (sysevent_attach_attributes(ev
, attr
) != 0)
5875 (void) log_sysevent(ev
, SE_SLEEP
, &eid
);
5879 sysevent_free_attr(attr
);