4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
25 * Copyright (c) 2012 by Delphix. All rights reserved.
29 * This file contains all the routines used when modifying on-disk SPA state.
30 * This includes opening, importing, destroying, exporting a pool, and syncing a
34 #include <sys/zfs_context.h>
35 #include <sys/fm/fs/zfs.h>
36 #include <sys/spa_impl.h>
38 #include <sys/zio_checksum.h>
40 #include <sys/dmu_tx.h>
44 #include <sys/vdev_impl.h>
45 #include <sys/metaslab.h>
46 #include <sys/metaslab_impl.h>
47 #include <sys/uberblock_impl.h>
50 #include <sys/dmu_traverse.h>
51 #include <sys/dmu_objset.h>
52 #include <sys/unique.h>
53 #include <sys/dsl_pool.h>
54 #include <sys/dsl_dataset.h>
55 #include <sys/dsl_dir.h>
56 #include <sys/dsl_prop.h>
57 #include <sys/dsl_synctask.h>
58 #include <sys/fs/zfs.h>
60 #include <sys/callb.h>
61 #include <sys/systeminfo.h>
62 #include <sys/spa_boot.h>
63 #include <sys/zfs_ioctl.h>
64 #include <sys/dsl_scan.h>
67 #include <sys/bootprops.h>
68 #include <sys/callb.h>
69 #include <sys/cpupart.h>
71 #include <sys/sysdc.h>
76 #include "zfs_comutil.h"
78 typedef enum zti_modes
{
79 zti_mode_fixed
, /* value is # of threads (min 1) */
80 zti_mode_online_percent
, /* value is % of online CPUs */
81 zti_mode_batch
, /* cpu-intensive; value is ignored */
82 zti_mode_null
, /* don't create a taskq */
86 #define ZTI_FIX(n) { zti_mode_fixed, (n) }
87 #define ZTI_PCT(n) { zti_mode_online_percent, (n) }
88 #define ZTI_BATCH { zti_mode_batch, 0 }
89 #define ZTI_NULL { zti_mode_null, 0 }
91 #define ZTI_ONE ZTI_FIX(1)
93 typedef struct zio_taskq_info
{
94 enum zti_modes zti_mode
;
98 static const char *const zio_taskq_types
[ZIO_TASKQ_TYPES
] = {
99 "issue", "issue_high", "intr", "intr_high"
103 * Define the taskq threads for the following I/O types:
104 * NULL, READ, WRITE, FREE, CLAIM, and IOCTL
106 const zio_taskq_info_t zio_taskqs
[ZIO_TYPES
][ZIO_TASKQ_TYPES
] = {
107 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */
108 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
109 { ZTI_FIX(8), ZTI_NULL
, ZTI_BATCH
, ZTI_NULL
},
110 { ZTI_BATCH
, ZTI_FIX(5), ZTI_FIX(8), ZTI_FIX(5) },
111 { ZTI_FIX(100), ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
112 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
113 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
},
116 static dsl_syncfunc_t spa_sync_props
;
117 static boolean_t
spa_has_active_shared_spare(spa_t
*spa
);
118 static int spa_load_impl(spa_t
*spa
, uint64_t, nvlist_t
*config
,
119 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
121 static void spa_vdev_resilver_done(spa_t
*spa
);
123 uint_t zio_taskq_batch_pct
= 100; /* 1 thread per cpu in pset */
124 id_t zio_taskq_psrset_bind
= PS_NONE
;
125 boolean_t zio_taskq_sysdc
= B_TRUE
; /* use SDC scheduling class */
126 uint_t zio_taskq_basedc
= 80; /* base duty cycle */
128 boolean_t spa_create_process
= B_TRUE
; /* no process ==> no sysdc */
131 * This (illegal) pool name is used when temporarily importing a spa_t in order
132 * to get the vdev stats associated with the imported devices.
134 #define TRYIMPORT_NAME "$import"
137 * ==========================================================================
138 * SPA properties routines
139 * ==========================================================================
143 * Add a (source=src, propname=propval) list to an nvlist.
146 spa_prop_add_list(nvlist_t
*nvl
, zpool_prop_t prop
, char *strval
,
147 uint64_t intval
, zprop_source_t src
)
149 const char *propname
= zpool_prop_to_name(prop
);
152 VERIFY(nvlist_alloc(&propval
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
153 VERIFY(nvlist_add_uint64(propval
, ZPROP_SOURCE
, src
) == 0);
156 VERIFY(nvlist_add_string(propval
, ZPROP_VALUE
, strval
) == 0);
158 VERIFY(nvlist_add_uint64(propval
, ZPROP_VALUE
, intval
) == 0);
160 VERIFY(nvlist_add_nvlist(nvl
, propname
, propval
) == 0);
161 nvlist_free(propval
);
165 * Get property values from the spa configuration.
168 spa_prop_get_config(spa_t
*spa
, nvlist_t
**nvp
)
170 vdev_t
*rvd
= spa
->spa_root_vdev
;
174 uint64_t cap
, version
;
175 zprop_source_t src
= ZPROP_SRC_NONE
;
176 spa_config_dirent_t
*dp
;
178 ASSERT(MUTEX_HELD(&spa
->spa_props_lock
));
181 alloc
= metaslab_class_get_alloc(spa_normal_class(spa
));
182 size
= metaslab_class_get_space(spa_normal_class(spa
));
183 spa_prop_add_list(*nvp
, ZPOOL_PROP_NAME
, spa_name(spa
), 0, src
);
184 spa_prop_add_list(*nvp
, ZPOOL_PROP_SIZE
, NULL
, size
, src
);
185 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALLOCATED
, NULL
, alloc
, src
);
186 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREE
, NULL
,
190 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
191 vdev_t
*tvd
= rvd
->vdev_child
[c
];
192 space
+= tvd
->vdev_max_asize
- tvd
->vdev_asize
;
194 spa_prop_add_list(*nvp
, ZPOOL_PROP_EXPANDSZ
, NULL
, space
,
197 spa_prop_add_list(*nvp
, ZPOOL_PROP_READONLY
, NULL
,
198 (spa_mode(spa
) == FREAD
), src
);
200 cap
= (size
== 0) ? 0 : (alloc
* 100 / size
);
201 spa_prop_add_list(*nvp
, ZPOOL_PROP_CAPACITY
, NULL
, cap
, src
);
203 spa_prop_add_list(*nvp
, ZPOOL_PROP_DEDUPRATIO
, NULL
,
204 ddt_get_pool_dedup_ratio(spa
), src
);
206 spa_prop_add_list(*nvp
, ZPOOL_PROP_HEALTH
, NULL
,
207 rvd
->vdev_state
, src
);
209 version
= spa_version(spa
);
210 if (version
== zpool_prop_default_numeric(ZPOOL_PROP_VERSION
))
211 src
= ZPROP_SRC_DEFAULT
;
213 src
= ZPROP_SRC_LOCAL
;
214 spa_prop_add_list(*nvp
, ZPOOL_PROP_VERSION
, NULL
, version
, src
);
217 spa_prop_add_list(*nvp
, ZPOOL_PROP_GUID
, NULL
, spa_guid(spa
), src
);
219 if (spa
->spa_comment
!= NULL
) {
220 spa_prop_add_list(*nvp
, ZPOOL_PROP_COMMENT
, spa
->spa_comment
,
224 if (spa
->spa_root
!= NULL
)
225 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALTROOT
, spa
->spa_root
,
228 if ((dp
= list_head(&spa
->spa_config_list
)) != NULL
) {
229 if (dp
->scd_path
== NULL
) {
230 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
231 "none", 0, ZPROP_SRC_LOCAL
);
232 } else if (strcmp(dp
->scd_path
, spa_config_path
) != 0) {
233 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
234 dp
->scd_path
, 0, ZPROP_SRC_LOCAL
);
240 * Get zpool property values.
243 spa_prop_get(spa_t
*spa
, nvlist_t
**nvp
)
245 objset_t
*mos
= spa
->spa_meta_objset
;
250 VERIFY(nvlist_alloc(nvp
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
252 mutex_enter(&spa
->spa_props_lock
);
255 * Get properties from the spa config.
257 spa_prop_get_config(spa
, nvp
);
259 /* If no pool property object, no more prop to get. */
260 if (mos
== NULL
|| spa
->spa_pool_props_object
== 0) {
261 mutex_exit(&spa
->spa_props_lock
);
266 * Get properties from the MOS pool property object.
268 for (zap_cursor_init(&zc
, mos
, spa
->spa_pool_props_object
);
269 (err
= zap_cursor_retrieve(&zc
, &za
)) == 0;
270 zap_cursor_advance(&zc
)) {
273 zprop_source_t src
= ZPROP_SRC_DEFAULT
;
276 if ((prop
= zpool_name_to_prop(za
.za_name
)) == ZPROP_INVAL
)
279 switch (za
.za_integer_length
) {
281 /* integer property */
282 if (za
.za_first_integer
!=
283 zpool_prop_default_numeric(prop
))
284 src
= ZPROP_SRC_LOCAL
;
286 if (prop
== ZPOOL_PROP_BOOTFS
) {
288 dsl_dataset_t
*ds
= NULL
;
290 dp
= spa_get_dsl(spa
);
291 rw_enter(&dp
->dp_config_rwlock
, RW_READER
);
292 if (err
= dsl_dataset_hold_obj(dp
,
293 za
.za_first_integer
, FTAG
, &ds
)) {
294 rw_exit(&dp
->dp_config_rwlock
);
299 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1,
301 dsl_dataset_name(ds
, strval
);
302 dsl_dataset_rele(ds
, FTAG
);
303 rw_exit(&dp
->dp_config_rwlock
);
306 intval
= za
.za_first_integer
;
309 spa_prop_add_list(*nvp
, prop
, strval
, intval
, src
);
313 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1);
318 /* string property */
319 strval
= kmem_alloc(za
.za_num_integers
, KM_SLEEP
);
320 err
= zap_lookup(mos
, spa
->spa_pool_props_object
,
321 za
.za_name
, 1, za
.za_num_integers
, strval
);
323 kmem_free(strval
, za
.za_num_integers
);
326 spa_prop_add_list(*nvp
, prop
, strval
, 0, src
);
327 kmem_free(strval
, za
.za_num_integers
);
334 zap_cursor_fini(&zc
);
335 mutex_exit(&spa
->spa_props_lock
);
337 if (err
&& err
!= ENOENT
) {
347 * Validate the given pool properties nvlist and modify the list
348 * for the property values to be set.
351 spa_prop_validate(spa_t
*spa
, nvlist_t
*props
)
354 int error
= 0, reset_bootfs
= 0;
358 while ((elem
= nvlist_next_nvpair(props
, elem
)) != NULL
) {
360 char *propname
, *strval
;
365 propname
= nvpair_name(elem
);
367 if ((prop
= zpool_name_to_prop(propname
)) == ZPROP_INVAL
)
371 case ZPOOL_PROP_VERSION
:
372 error
= nvpair_value_uint64(elem
, &intval
);
374 (intval
< spa_version(spa
) || intval
> SPA_VERSION
))
378 case ZPOOL_PROP_DELEGATION
:
379 case ZPOOL_PROP_AUTOREPLACE
:
380 case ZPOOL_PROP_LISTSNAPS
:
381 case ZPOOL_PROP_AUTOEXPAND
:
382 error
= nvpair_value_uint64(elem
, &intval
);
383 if (!error
&& intval
> 1)
387 case ZPOOL_PROP_BOOTFS
:
389 * If the pool version is less than SPA_VERSION_BOOTFS,
390 * or the pool is still being created (version == 0),
391 * the bootfs property cannot be set.
393 if (spa_version(spa
) < SPA_VERSION_BOOTFS
) {
399 * Make sure the vdev config is bootable
401 if (!vdev_is_bootable(spa
->spa_root_vdev
)) {
408 error
= nvpair_value_string(elem
, &strval
);
413 if (strval
== NULL
|| strval
[0] == '\0') {
414 objnum
= zpool_prop_default_numeric(
419 if (error
= dmu_objset_hold(strval
, FTAG
, &os
))
422 /* Must be ZPL and not gzip compressed. */
424 if (dmu_objset_type(os
) != DMU_OST_ZFS
) {
426 } else if ((error
= dsl_prop_get_integer(strval
,
427 zfs_prop_to_name(ZFS_PROP_COMPRESSION
),
428 &compress
, NULL
)) == 0 &&
429 !BOOTFS_COMPRESS_VALID(compress
)) {
432 objnum
= dmu_objset_id(os
);
434 dmu_objset_rele(os
, FTAG
);
438 case ZPOOL_PROP_FAILUREMODE
:
439 error
= nvpair_value_uint64(elem
, &intval
);
440 if (!error
&& (intval
< ZIO_FAILURE_MODE_WAIT
||
441 intval
> ZIO_FAILURE_MODE_PANIC
))
445 * This is a special case which only occurs when
446 * the pool has completely failed. This allows
447 * the user to change the in-core failmode property
448 * without syncing it out to disk (I/Os might
449 * currently be blocked). We do this by returning
450 * EIO to the caller (spa_prop_set) to trick it
451 * into thinking we encountered a property validation
454 if (!error
&& spa_suspended(spa
)) {
455 spa
->spa_failmode
= intval
;
460 case ZPOOL_PROP_CACHEFILE
:
461 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
464 if (strval
[0] == '\0')
467 if (strcmp(strval
, "none") == 0)
470 if (strval
[0] != '/') {
475 slash
= strrchr(strval
, '/');
476 ASSERT(slash
!= NULL
);
478 if (slash
[1] == '\0' || strcmp(slash
, "/.") == 0 ||
479 strcmp(slash
, "/..") == 0)
483 case ZPOOL_PROP_COMMENT
:
484 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
486 for (check
= strval
; *check
!= '\0'; check
++) {
488 * The kernel doesn't have an easy isprint()
489 * check. For this kernel check, we merely
490 * check ASCII apart from DEL. Fix this if
491 * there is an easy-to-use kernel isprint().
493 if (*check
>= 0x7f) {
499 if (strlen(strval
) > ZPROP_MAX_COMMENT
)
503 case ZPOOL_PROP_DEDUPDITTO
:
504 if (spa_version(spa
) < SPA_VERSION_DEDUP
)
507 error
= nvpair_value_uint64(elem
, &intval
);
509 intval
!= 0 && intval
< ZIO_DEDUPDITTO_MIN
)
518 if (!error
&& reset_bootfs
) {
519 error
= nvlist_remove(props
,
520 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), DATA_TYPE_STRING
);
523 error
= nvlist_add_uint64(props
,
524 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), objnum
);
532 spa_configfile_set(spa_t
*spa
, nvlist_t
*nvp
, boolean_t need_sync
)
535 spa_config_dirent_t
*dp
;
537 if (nvlist_lookup_string(nvp
, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE
),
541 dp
= kmem_alloc(sizeof (spa_config_dirent_t
),
544 if (cachefile
[0] == '\0')
545 dp
->scd_path
= spa_strdup(spa_config_path
);
546 else if (strcmp(cachefile
, "none") == 0)
549 dp
->scd_path
= spa_strdup(cachefile
);
551 list_insert_head(&spa
->spa_config_list
, dp
);
553 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
557 spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
)
561 boolean_t need_sync
= B_FALSE
;
564 if ((error
= spa_prop_validate(spa
, nvp
)) != 0)
568 while ((elem
= nvlist_next_nvpair(nvp
, elem
)) != NULL
) {
569 if ((prop
= zpool_name_to_prop(
570 nvpair_name(elem
))) == ZPROP_INVAL
)
573 if (prop
== ZPOOL_PROP_CACHEFILE
||
574 prop
== ZPOOL_PROP_ALTROOT
||
575 prop
== ZPOOL_PROP_READONLY
)
583 return (dsl_sync_task_do(spa_get_dsl(spa
), NULL
, spa_sync_props
,
590 * If the bootfs property value is dsobj, clear it.
593 spa_prop_clear_bootfs(spa_t
*spa
, uint64_t dsobj
, dmu_tx_t
*tx
)
595 if (spa
->spa_bootfs
== dsobj
&& spa
->spa_pool_props_object
!= 0) {
596 VERIFY(zap_remove(spa
->spa_meta_objset
,
597 spa
->spa_pool_props_object
,
598 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), tx
) == 0);
604 * Change the GUID for the pool. This is done so that we can later
605 * re-import a pool built from a clone of our own vdevs. We will modify
606 * the root vdev's guid, our own pool guid, and then mark all of our
607 * vdevs dirty. Note that we must make sure that all our vdevs are
608 * online when we do this, or else any vdevs that weren't present
609 * would be orphaned from our pool. We are also going to issue a
610 * sysevent to update any watchers.
613 spa_change_guid(spa_t
*spa
)
615 uint64_t oldguid
, newguid
;
618 if (!(spa_mode_global
& FWRITE
))
621 txg
= spa_vdev_enter(spa
);
623 if (spa
->spa_root_vdev
->vdev_state
!= VDEV_STATE_HEALTHY
)
624 return (spa_vdev_exit(spa
, NULL
, txg
, ENXIO
));
626 oldguid
= spa_guid(spa
);
627 newguid
= spa_generate_guid(NULL
);
628 ASSERT3U(oldguid
, !=, newguid
);
630 spa
->spa_root_vdev
->vdev_guid
= newguid
;
631 spa
->spa_root_vdev
->vdev_guid_sum
+= (newguid
- oldguid
);
633 vdev_config_dirty(spa
->spa_root_vdev
);
635 spa_event_notify(spa
, NULL
, ESC_ZFS_POOL_REGUID
);
637 return (spa_vdev_exit(spa
, NULL
, txg
, 0));
641 * ==========================================================================
642 * SPA state manipulation (open/create/destroy/import/export)
643 * ==========================================================================
647 spa_error_entry_compare(const void *a
, const void *b
)
649 spa_error_entry_t
*sa
= (spa_error_entry_t
*)a
;
650 spa_error_entry_t
*sb
= (spa_error_entry_t
*)b
;
653 ret
= bcmp(&sa
->se_bookmark
, &sb
->se_bookmark
,
654 sizeof (zbookmark_t
));
665 * Utility function which retrieves copies of the current logs and
666 * re-initializes them in the process.
669 spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
)
671 ASSERT(MUTEX_HELD(&spa
->spa_errlist_lock
));
673 bcopy(&spa
->spa_errlist_last
, last
, sizeof (avl_tree_t
));
674 bcopy(&spa
->spa_errlist_scrub
, scrub
, sizeof (avl_tree_t
));
676 avl_create(&spa
->spa_errlist_scrub
,
677 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
678 offsetof(spa_error_entry_t
, se_avl
));
679 avl_create(&spa
->spa_errlist_last
,
680 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
681 offsetof(spa_error_entry_t
, se_avl
));
685 spa_taskq_create(spa_t
*spa
, const char *name
, enum zti_modes mode
,
689 boolean_t batch
= B_FALSE
;
693 return (NULL
); /* no taskq needed */
696 ASSERT3U(value
, >=, 1);
697 value
= MAX(value
, 1);
702 flags
|= TASKQ_THREADS_CPU_PCT
;
703 value
= zio_taskq_batch_pct
;
706 case zti_mode_online_percent
:
707 flags
|= TASKQ_THREADS_CPU_PCT
;
711 panic("unrecognized mode for %s taskq (%u:%u) in "
717 if (zio_taskq_sysdc
&& spa
->spa_proc
!= &p0
) {
719 flags
|= TASKQ_DC_BATCH
;
721 return (taskq_create_sysdc(name
, value
, 50, INT_MAX
,
722 spa
->spa_proc
, zio_taskq_basedc
, flags
));
724 return (taskq_create_proc(name
, value
, maxclsyspri
, 50, INT_MAX
,
725 spa
->spa_proc
, flags
));
729 spa_create_zio_taskqs(spa_t
*spa
)
731 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
732 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
733 const zio_taskq_info_t
*ztip
= &zio_taskqs
[t
][q
];
734 enum zti_modes mode
= ztip
->zti_mode
;
735 uint_t value
= ztip
->zti_value
;
738 (void) snprintf(name
, sizeof (name
),
739 "%s_%s", zio_type_name
[t
], zio_taskq_types
[q
]);
741 spa
->spa_zio_taskq
[t
][q
] =
742 spa_taskq_create(spa
, name
, mode
, value
);
749 spa_thread(void *arg
)
754 user_t
*pu
= PTOU(curproc
);
756 CALLB_CPR_INIT(&cprinfo
, &spa
->spa_proc_lock
, callb_generic_cpr
,
759 ASSERT(curproc
!= &p0
);
760 (void) snprintf(pu
->u_psargs
, sizeof (pu
->u_psargs
),
761 "zpool-%s", spa
->spa_name
);
762 (void) strlcpy(pu
->u_comm
, pu
->u_psargs
, sizeof (pu
->u_comm
));
764 /* bind this thread to the requested psrset */
765 if (zio_taskq_psrset_bind
!= PS_NONE
) {
767 mutex_enter(&cpu_lock
);
768 mutex_enter(&pidlock
);
769 mutex_enter(&curproc
->p_lock
);
771 if (cpupart_bind_thread(curthread
, zio_taskq_psrset_bind
,
772 0, NULL
, NULL
) == 0) {
773 curthread
->t_bind_pset
= zio_taskq_psrset_bind
;
776 "Couldn't bind process for zfs pool \"%s\" to "
777 "pset %d\n", spa
->spa_name
, zio_taskq_psrset_bind
);
780 mutex_exit(&curproc
->p_lock
);
781 mutex_exit(&pidlock
);
782 mutex_exit(&cpu_lock
);
786 if (zio_taskq_sysdc
) {
787 sysdc_thread_enter(curthread
, 100, 0);
790 spa
->spa_proc
= curproc
;
791 spa
->spa_did
= curthread
->t_did
;
793 spa_create_zio_taskqs(spa
);
795 mutex_enter(&spa
->spa_proc_lock
);
796 ASSERT(spa
->spa_proc_state
== SPA_PROC_CREATED
);
798 spa
->spa_proc_state
= SPA_PROC_ACTIVE
;
799 cv_broadcast(&spa
->spa_proc_cv
);
801 CALLB_CPR_SAFE_BEGIN(&cprinfo
);
802 while (spa
->spa_proc_state
== SPA_PROC_ACTIVE
)
803 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
804 CALLB_CPR_SAFE_END(&cprinfo
, &spa
->spa_proc_lock
);
806 ASSERT(spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
);
807 spa
->spa_proc_state
= SPA_PROC_GONE
;
809 cv_broadcast(&spa
->spa_proc_cv
);
810 CALLB_CPR_EXIT(&cprinfo
); /* drops spa_proc_lock */
812 mutex_enter(&curproc
->p_lock
);
818 * Activate an uninitialized pool.
821 spa_activate(spa_t
*spa
, int mode
)
823 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
825 spa
->spa_state
= POOL_STATE_ACTIVE
;
826 spa
->spa_mode
= mode
;
828 spa
->spa_normal_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
829 spa
->spa_log_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
831 /* Try to create a covering process */
832 mutex_enter(&spa
->spa_proc_lock
);
833 ASSERT(spa
->spa_proc_state
== SPA_PROC_NONE
);
834 ASSERT(spa
->spa_proc
== &p0
);
837 /* Only create a process if we're going to be around a while. */
838 if (spa_create_process
&& strcmp(spa
->spa_name
, TRYIMPORT_NAME
) != 0) {
839 if (newproc(spa_thread
, (caddr_t
)spa
, syscid
, maxclsyspri
,
841 spa
->spa_proc_state
= SPA_PROC_CREATED
;
842 while (spa
->spa_proc_state
== SPA_PROC_CREATED
) {
843 cv_wait(&spa
->spa_proc_cv
,
844 &spa
->spa_proc_lock
);
846 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
847 ASSERT(spa
->spa_proc
!= &p0
);
848 ASSERT(spa
->spa_did
!= 0);
852 "Couldn't create process for zfs pool \"%s\"\n",
857 mutex_exit(&spa
->spa_proc_lock
);
859 /* If we didn't create a process, we need to create our taskqs. */
860 if (spa
->spa_proc
== &p0
) {
861 spa_create_zio_taskqs(spa
);
864 list_create(&spa
->spa_config_dirty_list
, sizeof (vdev_t
),
865 offsetof(vdev_t
, vdev_config_dirty_node
));
866 list_create(&spa
->spa_state_dirty_list
, sizeof (vdev_t
),
867 offsetof(vdev_t
, vdev_state_dirty_node
));
869 txg_list_create(&spa
->spa_vdev_txg_list
,
870 offsetof(struct vdev
, vdev_txg_node
));
872 avl_create(&spa
->spa_errlist_scrub
,
873 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
874 offsetof(spa_error_entry_t
, se_avl
));
875 avl_create(&spa
->spa_errlist_last
,
876 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
877 offsetof(spa_error_entry_t
, se_avl
));
881 * Opposite of spa_activate().
884 spa_deactivate(spa_t
*spa
)
886 ASSERT(spa
->spa_sync_on
== B_FALSE
);
887 ASSERT(spa
->spa_dsl_pool
== NULL
);
888 ASSERT(spa
->spa_root_vdev
== NULL
);
889 ASSERT(spa
->spa_async_zio_root
== NULL
);
890 ASSERT(spa
->spa_state
!= POOL_STATE_UNINITIALIZED
);
892 txg_list_destroy(&spa
->spa_vdev_txg_list
);
894 list_destroy(&spa
->spa_config_dirty_list
);
895 list_destroy(&spa
->spa_state_dirty_list
);
897 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
898 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
899 if (spa
->spa_zio_taskq
[t
][q
] != NULL
)
900 taskq_destroy(spa
->spa_zio_taskq
[t
][q
]);
901 spa
->spa_zio_taskq
[t
][q
] = NULL
;
905 metaslab_class_destroy(spa
->spa_normal_class
);
906 spa
->spa_normal_class
= NULL
;
908 metaslab_class_destroy(spa
->spa_log_class
);
909 spa
->spa_log_class
= NULL
;
912 * If this was part of an import or the open otherwise failed, we may
913 * still have errors left in the queues. Empty them just in case.
915 spa_errlog_drain(spa
);
917 avl_destroy(&spa
->spa_errlist_scrub
);
918 avl_destroy(&spa
->spa_errlist_last
);
920 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
922 mutex_enter(&spa
->spa_proc_lock
);
923 if (spa
->spa_proc_state
!= SPA_PROC_NONE
) {
924 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
925 spa
->spa_proc_state
= SPA_PROC_DEACTIVATE
;
926 cv_broadcast(&spa
->spa_proc_cv
);
927 while (spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
) {
928 ASSERT(spa
->spa_proc
!= &p0
);
929 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
931 ASSERT(spa
->spa_proc_state
== SPA_PROC_GONE
);
932 spa
->spa_proc_state
= SPA_PROC_NONE
;
934 ASSERT(spa
->spa_proc
== &p0
);
935 mutex_exit(&spa
->spa_proc_lock
);
938 * We want to make sure spa_thread() has actually exited the ZFS
939 * module, so that the module can't be unloaded out from underneath
942 if (spa
->spa_did
!= 0) {
943 thread_join(spa
->spa_did
);
949 * Verify a pool configuration, and construct the vdev tree appropriately. This
950 * will create all the necessary vdevs in the appropriate layout, with each vdev
951 * in the CLOSED state. This will prep the pool before open/creation/import.
952 * All vdev validation is done by the vdev_alloc() routine.
955 spa_config_parse(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
,
956 uint_t id
, int atype
)
962 if ((error
= vdev_alloc(spa
, vdp
, nv
, parent
, id
, atype
)) != 0)
965 if ((*vdp
)->vdev_ops
->vdev_op_leaf
)
968 error
= nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
980 for (int c
= 0; c
< children
; c
++) {
982 if ((error
= spa_config_parse(spa
, &vd
, child
[c
], *vdp
, c
,
990 ASSERT(*vdp
!= NULL
);
996 * Opposite of spa_load().
999 spa_unload(spa_t
*spa
)
1003 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1008 spa_async_suspend(spa
);
1013 if (spa
->spa_sync_on
) {
1014 txg_sync_stop(spa
->spa_dsl_pool
);
1015 spa
->spa_sync_on
= B_FALSE
;
1019 * Wait for any outstanding async I/O to complete.
1021 if (spa
->spa_async_zio_root
!= NULL
) {
1022 (void) zio_wait(spa
->spa_async_zio_root
);
1023 spa
->spa_async_zio_root
= NULL
;
1026 bpobj_close(&spa
->spa_deferred_bpobj
);
1029 * Close the dsl pool.
1031 if (spa
->spa_dsl_pool
) {
1032 dsl_pool_close(spa
->spa_dsl_pool
);
1033 spa
->spa_dsl_pool
= NULL
;
1034 spa
->spa_meta_objset
= NULL
;
1039 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1042 * Drop and purge level 2 cache
1044 spa_l2cache_drop(spa
);
1049 if (spa
->spa_root_vdev
)
1050 vdev_free(spa
->spa_root_vdev
);
1051 ASSERT(spa
->spa_root_vdev
== NULL
);
1053 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1054 vdev_free(spa
->spa_spares
.sav_vdevs
[i
]);
1055 if (spa
->spa_spares
.sav_vdevs
) {
1056 kmem_free(spa
->spa_spares
.sav_vdevs
,
1057 spa
->spa_spares
.sav_count
* sizeof (void *));
1058 spa
->spa_spares
.sav_vdevs
= NULL
;
1060 if (spa
->spa_spares
.sav_config
) {
1061 nvlist_free(spa
->spa_spares
.sav_config
);
1062 spa
->spa_spares
.sav_config
= NULL
;
1064 spa
->spa_spares
.sav_count
= 0;
1066 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
1067 vdev_clear_stats(spa
->spa_l2cache
.sav_vdevs
[i
]);
1068 vdev_free(spa
->spa_l2cache
.sav_vdevs
[i
]);
1070 if (spa
->spa_l2cache
.sav_vdevs
) {
1071 kmem_free(spa
->spa_l2cache
.sav_vdevs
,
1072 spa
->spa_l2cache
.sav_count
* sizeof (void *));
1073 spa
->spa_l2cache
.sav_vdevs
= NULL
;
1075 if (spa
->spa_l2cache
.sav_config
) {
1076 nvlist_free(spa
->spa_l2cache
.sav_config
);
1077 spa
->spa_l2cache
.sav_config
= NULL
;
1079 spa
->spa_l2cache
.sav_count
= 0;
1081 spa
->spa_async_suspended
= 0;
1083 if (spa
->spa_comment
!= NULL
) {
1084 spa_strfree(spa
->spa_comment
);
1085 spa
->spa_comment
= NULL
;
1088 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1092 * Load (or re-load) the current list of vdevs describing the active spares for
1093 * this pool. When this is called, we have some form of basic information in
1094 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1095 * then re-generate a more complete list including status information.
1098 spa_load_spares(spa_t
*spa
)
1105 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1108 * First, close and free any existing spare vdevs.
1110 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1111 vd
= spa
->spa_spares
.sav_vdevs
[i
];
1113 /* Undo the call to spa_activate() below */
1114 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1115 B_FALSE
)) != NULL
&& tvd
->vdev_isspare
)
1116 spa_spare_remove(tvd
);
1121 if (spa
->spa_spares
.sav_vdevs
)
1122 kmem_free(spa
->spa_spares
.sav_vdevs
,
1123 spa
->spa_spares
.sav_count
* sizeof (void *));
1125 if (spa
->spa_spares
.sav_config
== NULL
)
1128 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
1129 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
1131 spa
->spa_spares
.sav_count
= (int)nspares
;
1132 spa
->spa_spares
.sav_vdevs
= NULL
;
1138 * Construct the array of vdevs, opening them to get status in the
1139 * process. For each spare, there is potentially two different vdev_t
1140 * structures associated with it: one in the list of spares (used only
1141 * for basic validation purposes) and one in the active vdev
1142 * configuration (if it's spared in). During this phase we open and
1143 * validate each vdev on the spare list. If the vdev also exists in the
1144 * active configuration, then we also mark this vdev as an active spare.
1146 spa
->spa_spares
.sav_vdevs
= kmem_alloc(nspares
* sizeof (void *),
1148 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1149 VERIFY(spa_config_parse(spa
, &vd
, spares
[i
], NULL
, 0,
1150 VDEV_ALLOC_SPARE
) == 0);
1153 spa
->spa_spares
.sav_vdevs
[i
] = vd
;
1155 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1156 B_FALSE
)) != NULL
) {
1157 if (!tvd
->vdev_isspare
)
1161 * We only mark the spare active if we were successfully
1162 * able to load the vdev. Otherwise, importing a pool
1163 * with a bad active spare would result in strange
1164 * behavior, because multiple pool would think the spare
1165 * is actively in use.
1167 * There is a vulnerability here to an equally bizarre
1168 * circumstance, where a dead active spare is later
1169 * brought back to life (onlined or otherwise). Given
1170 * the rarity of this scenario, and the extra complexity
1171 * it adds, we ignore the possibility.
1173 if (!vdev_is_dead(tvd
))
1174 spa_spare_activate(tvd
);
1178 vd
->vdev_aux
= &spa
->spa_spares
;
1180 if (vdev_open(vd
) != 0)
1183 if (vdev_validate_aux(vd
) == 0)
1188 * Recompute the stashed list of spares, with status information
1191 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
, ZPOOL_CONFIG_SPARES
,
1192 DATA_TYPE_NVLIST_ARRAY
) == 0);
1194 spares
= kmem_alloc(spa
->spa_spares
.sav_count
* sizeof (void *),
1196 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1197 spares
[i
] = vdev_config_generate(spa
,
1198 spa
->spa_spares
.sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_SPARE
);
1199 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
1200 ZPOOL_CONFIG_SPARES
, spares
, spa
->spa_spares
.sav_count
) == 0);
1201 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1202 nvlist_free(spares
[i
]);
1203 kmem_free(spares
, spa
->spa_spares
.sav_count
* sizeof (void *));
1207 * Load (or re-load) the current list of vdevs describing the active l2cache for
1208 * this pool. When this is called, we have some form of basic information in
1209 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1210 * then re-generate a more complete list including status information.
1211 * Devices which are already active have their details maintained, and are
1215 spa_load_l2cache(spa_t
*spa
)
1219 int i
, j
, oldnvdevs
;
1221 vdev_t
*vd
, **oldvdevs
, **newvdevs
;
1222 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
1224 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1226 if (sav
->sav_config
!= NULL
) {
1227 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
1228 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
1229 newvdevs
= kmem_alloc(nl2cache
* sizeof (void *), KM_SLEEP
);
1234 oldvdevs
= sav
->sav_vdevs
;
1235 oldnvdevs
= sav
->sav_count
;
1236 sav
->sav_vdevs
= NULL
;
1240 * Process new nvlist of vdevs.
1242 for (i
= 0; i
< nl2cache
; i
++) {
1243 VERIFY(nvlist_lookup_uint64(l2cache
[i
], ZPOOL_CONFIG_GUID
,
1247 for (j
= 0; j
< oldnvdevs
; j
++) {
1249 if (vd
!= NULL
&& guid
== vd
->vdev_guid
) {
1251 * Retain previous vdev for add/remove ops.
1259 if (newvdevs
[i
] == NULL
) {
1263 VERIFY(spa_config_parse(spa
, &vd
, l2cache
[i
], NULL
, 0,
1264 VDEV_ALLOC_L2CACHE
) == 0);
1269 * Commit this vdev as an l2cache device,
1270 * even if it fails to open.
1272 spa_l2cache_add(vd
);
1277 spa_l2cache_activate(vd
);
1279 if (vdev_open(vd
) != 0)
1282 (void) vdev_validate_aux(vd
);
1284 if (!vdev_is_dead(vd
))
1285 l2arc_add_vdev(spa
, vd
);
1290 * Purge vdevs that were dropped
1292 for (i
= 0; i
< oldnvdevs
; i
++) {
1297 ASSERT(vd
->vdev_isl2cache
);
1299 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
1300 pool
!= 0ULL && l2arc_vdev_present(vd
))
1301 l2arc_remove_vdev(vd
);
1302 vdev_clear_stats(vd
);
1308 kmem_free(oldvdevs
, oldnvdevs
* sizeof (void *));
1310 if (sav
->sav_config
== NULL
)
1313 sav
->sav_vdevs
= newvdevs
;
1314 sav
->sav_count
= (int)nl2cache
;
1317 * Recompute the stashed list of l2cache devices, with status
1318 * information this time.
1320 VERIFY(nvlist_remove(sav
->sav_config
, ZPOOL_CONFIG_L2CACHE
,
1321 DATA_TYPE_NVLIST_ARRAY
) == 0);
1323 l2cache
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
1324 for (i
= 0; i
< sav
->sav_count
; i
++)
1325 l2cache
[i
] = vdev_config_generate(spa
,
1326 sav
->sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_L2CACHE
);
1327 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
1328 ZPOOL_CONFIG_L2CACHE
, l2cache
, sav
->sav_count
) == 0);
1330 for (i
= 0; i
< sav
->sav_count
; i
++)
1331 nvlist_free(l2cache
[i
]);
1333 kmem_free(l2cache
, sav
->sav_count
* sizeof (void *));
1337 load_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
**value
)
1340 char *packed
= NULL
;
1345 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
1346 nvsize
= *(uint64_t *)db
->db_data
;
1347 dmu_buf_rele(db
, FTAG
);
1349 packed
= kmem_alloc(nvsize
, KM_SLEEP
);
1350 error
= dmu_read(spa
->spa_meta_objset
, obj
, 0, nvsize
, packed
,
1353 error
= nvlist_unpack(packed
, nvsize
, value
, 0);
1354 kmem_free(packed
, nvsize
);
1360 * Checks to see if the given vdev could not be opened, in which case we post a
1361 * sysevent to notify the autoreplace code that the device has been removed.
1364 spa_check_removed(vdev_t
*vd
)
1366 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1367 spa_check_removed(vd
->vdev_child
[c
]);
1369 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_is_dead(vd
)) {
1370 zfs_post_autoreplace(vd
->vdev_spa
, vd
);
1371 spa_event_notify(vd
->vdev_spa
, vd
, ESC_ZFS_VDEV_CHECK
);
1376 * Validate the current config against the MOS config
1379 spa_config_valid(spa_t
*spa
, nvlist_t
*config
)
1381 vdev_t
*mrvd
, *rvd
= spa
->spa_root_vdev
;
1384 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nv
) == 0);
1386 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1387 VERIFY(spa_config_parse(spa
, &mrvd
, nv
, NULL
, 0, VDEV_ALLOC_LOAD
) == 0);
1389 ASSERT3U(rvd
->vdev_children
, ==, mrvd
->vdev_children
);
1392 * If we're doing a normal import, then build up any additional
1393 * diagnostic information about missing devices in this config.
1394 * We'll pass this up to the user for further processing.
1396 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
)) {
1397 nvlist_t
**child
, *nv
;
1400 child
= kmem_alloc(rvd
->vdev_children
* sizeof (nvlist_t
**),
1402 VERIFY(nvlist_alloc(&nv
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
1404 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1405 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1406 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1408 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1409 mtvd
->vdev_ops
!= &vdev_missing_ops
&&
1411 child
[idx
++] = vdev_config_generate(spa
, mtvd
,
1416 VERIFY(nvlist_add_nvlist_array(nv
,
1417 ZPOOL_CONFIG_CHILDREN
, child
, idx
) == 0);
1418 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
1419 ZPOOL_CONFIG_MISSING_DEVICES
, nv
) == 0);
1421 for (int i
= 0; i
< idx
; i
++)
1422 nvlist_free(child
[i
]);
1425 kmem_free(child
, rvd
->vdev_children
* sizeof (char **));
1429 * Compare the root vdev tree with the information we have
1430 * from the MOS config (mrvd). Check each top-level vdev
1431 * with the corresponding MOS config top-level (mtvd).
1433 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1434 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1435 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1438 * Resolve any "missing" vdevs in the current configuration.
1439 * If we find that the MOS config has more accurate information
1440 * about the top-level vdev then use that vdev instead.
1442 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1443 mtvd
->vdev_ops
!= &vdev_missing_ops
) {
1445 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
))
1449 * Device specific actions.
1451 if (mtvd
->vdev_islog
) {
1452 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
1455 * XXX - once we have 'readonly' pool
1456 * support we should be able to handle
1457 * missing data devices by transitioning
1458 * the pool to readonly.
1464 * Swap the missing vdev with the data we were
1465 * able to obtain from the MOS config.
1467 vdev_remove_child(rvd
, tvd
);
1468 vdev_remove_child(mrvd
, mtvd
);
1470 vdev_add_child(rvd
, mtvd
);
1471 vdev_add_child(mrvd
, tvd
);
1473 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1475 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1478 } else if (mtvd
->vdev_islog
) {
1480 * Load the slog device's state from the MOS config
1481 * since it's possible that the label does not
1482 * contain the most up-to-date information.
1484 vdev_load_log_state(tvd
, mtvd
);
1489 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1492 * Ensure we were able to validate the config.
1494 return (rvd
->vdev_guid_sum
== spa
->spa_uberblock
.ub_guid_sum
);
1498 * Check for missing log devices
1501 spa_check_logs(spa_t
*spa
)
1503 switch (spa
->spa_log_state
) {
1504 case SPA_LOG_MISSING
:
1505 /* need to recheck in case slog has been restored */
1506 case SPA_LOG_UNKNOWN
:
1507 if (dmu_objset_find(spa
->spa_name
, zil_check_log_chain
, NULL
,
1508 DS_FIND_CHILDREN
)) {
1509 spa_set_log_state(spa
, SPA_LOG_MISSING
);
1518 spa_passivate_log(spa_t
*spa
)
1520 vdev_t
*rvd
= spa
->spa_root_vdev
;
1521 boolean_t slog_found
= B_FALSE
;
1523 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1525 if (!spa_has_slogs(spa
))
1528 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1529 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1530 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1532 if (tvd
->vdev_islog
) {
1533 metaslab_group_passivate(mg
);
1534 slog_found
= B_TRUE
;
1538 return (slog_found
);
1542 spa_activate_log(spa_t
*spa
)
1544 vdev_t
*rvd
= spa
->spa_root_vdev
;
1546 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1548 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1549 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1550 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1552 if (tvd
->vdev_islog
)
1553 metaslab_group_activate(mg
);
1558 spa_offline_log(spa_t
*spa
)
1562 if ((error
= dmu_objset_find(spa_name(spa
), zil_vdev_offline
,
1563 NULL
, DS_FIND_CHILDREN
)) == 0) {
1566 * We successfully offlined the log device, sync out the
1567 * current txg so that the "stubby" block can be removed
1570 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1576 spa_aux_check_removed(spa_aux_vdev_t
*sav
)
1578 for (int i
= 0; i
< sav
->sav_count
; i
++)
1579 spa_check_removed(sav
->sav_vdevs
[i
]);
1583 spa_claim_notify(zio_t
*zio
)
1585 spa_t
*spa
= zio
->io_spa
;
1590 mutex_enter(&spa
->spa_props_lock
); /* any mutex will do */
1591 if (spa
->spa_claim_max_txg
< zio
->io_bp
->blk_birth
)
1592 spa
->spa_claim_max_txg
= zio
->io_bp
->blk_birth
;
1593 mutex_exit(&spa
->spa_props_lock
);
1596 typedef struct spa_load_error
{
1597 uint64_t sle_meta_count
;
1598 uint64_t sle_data_count
;
1602 spa_load_verify_done(zio_t
*zio
)
1604 blkptr_t
*bp
= zio
->io_bp
;
1605 spa_load_error_t
*sle
= zio
->io_private
;
1606 dmu_object_type_t type
= BP_GET_TYPE(bp
);
1607 int error
= zio
->io_error
;
1610 if ((BP_GET_LEVEL(bp
) != 0 || dmu_ot
[type
].ot_metadata
) &&
1611 type
!= DMU_OT_INTENT_LOG
)
1612 atomic_add_64(&sle
->sle_meta_count
, 1);
1614 atomic_add_64(&sle
->sle_data_count
, 1);
1616 zio_data_buf_free(zio
->io_data
, zio
->io_size
);
1621 spa_load_verify_cb(spa_t
*spa
, zilog_t
*zilog
, const blkptr_t
*bp
,
1622 arc_buf_t
*pbuf
, const zbookmark_t
*zb
, const dnode_phys_t
*dnp
, void *arg
)
1626 size_t size
= BP_GET_PSIZE(bp
);
1627 void *data
= zio_data_buf_alloc(size
);
1629 zio_nowait(zio_read(rio
, spa
, bp
, data
, size
,
1630 spa_load_verify_done
, rio
->io_private
, ZIO_PRIORITY_SCRUB
,
1631 ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_CANFAIL
|
1632 ZIO_FLAG_SCRUB
| ZIO_FLAG_RAW
, zb
));
1638 spa_load_verify(spa_t
*spa
)
1641 spa_load_error_t sle
= { 0 };
1642 zpool_rewind_policy_t policy
;
1643 boolean_t verify_ok
= B_FALSE
;
1646 zpool_get_rewind_policy(spa
->spa_config
, &policy
);
1648 if (policy
.zrp_request
& ZPOOL_NEVER_REWIND
)
1651 rio
= zio_root(spa
, NULL
, &sle
,
1652 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
);
1654 error
= traverse_pool(spa
, spa
->spa_verify_min_txg
,
1655 TRAVERSE_PRE
| TRAVERSE_PREFETCH
, spa_load_verify_cb
, rio
);
1657 (void) zio_wait(rio
);
1659 spa
->spa_load_meta_errors
= sle
.sle_meta_count
;
1660 spa
->spa_load_data_errors
= sle
.sle_data_count
;
1662 if (!error
&& sle
.sle_meta_count
<= policy
.zrp_maxmeta
&&
1663 sle
.sle_data_count
<= policy
.zrp_maxdata
) {
1667 spa
->spa_load_txg
= spa
->spa_uberblock
.ub_txg
;
1668 spa
->spa_load_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
1670 loss
= spa
->spa_last_ubsync_txg_ts
- spa
->spa_load_txg_ts
;
1671 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1672 ZPOOL_CONFIG_LOAD_TIME
, spa
->spa_load_txg_ts
) == 0);
1673 VERIFY(nvlist_add_int64(spa
->spa_load_info
,
1674 ZPOOL_CONFIG_REWIND_TIME
, loss
) == 0);
1675 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1676 ZPOOL_CONFIG_LOAD_DATA_ERRORS
, sle
.sle_data_count
) == 0);
1678 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
;
1682 if (error
!= ENXIO
&& error
!= EIO
)
1687 return (verify_ok
? 0 : EIO
);
1691 * Find a value in the pool props object.
1694 spa_prop_find(spa_t
*spa
, zpool_prop_t prop
, uint64_t *val
)
1696 (void) zap_lookup(spa
->spa_meta_objset
, spa
->spa_pool_props_object
,
1697 zpool_prop_to_name(prop
), sizeof (uint64_t), 1, val
);
1701 * Find a value in the pool directory object.
1704 spa_dir_prop(spa_t
*spa
, const char *name
, uint64_t *val
)
1706 return (zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
1707 name
, sizeof (uint64_t), 1, val
));
1711 spa_vdev_err(vdev_t
*vdev
, vdev_aux_t aux
, int err
)
1713 vdev_set_state(vdev
, B_TRUE
, VDEV_STATE_CANT_OPEN
, aux
);
1718 * Fix up config after a partly-completed split. This is done with the
1719 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
1720 * pool have that entry in their config, but only the splitting one contains
1721 * a list of all the guids of the vdevs that are being split off.
1723 * This function determines what to do with that list: either rejoin
1724 * all the disks to the pool, or complete the splitting process. To attempt
1725 * the rejoin, each disk that is offlined is marked online again, and
1726 * we do a reopen() call. If the vdev label for every disk that was
1727 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
1728 * then we call vdev_split() on each disk, and complete the split.
1730 * Otherwise we leave the config alone, with all the vdevs in place in
1731 * the original pool.
1734 spa_try_repair(spa_t
*spa
, nvlist_t
*config
)
1741 boolean_t attempt_reopen
;
1743 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
, &nvl
) != 0)
1746 /* check that the config is complete */
1747 if (nvlist_lookup_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
1748 &glist
, &gcount
) != 0)
1751 vd
= kmem_zalloc(gcount
* sizeof (vdev_t
*), KM_SLEEP
);
1753 /* attempt to online all the vdevs & validate */
1754 attempt_reopen
= B_TRUE
;
1755 for (i
= 0; i
< gcount
; i
++) {
1756 if (glist
[i
] == 0) /* vdev is hole */
1759 vd
[i
] = spa_lookup_by_guid(spa
, glist
[i
], B_FALSE
);
1760 if (vd
[i
] == NULL
) {
1762 * Don't bother attempting to reopen the disks;
1763 * just do the split.
1765 attempt_reopen
= B_FALSE
;
1767 /* attempt to re-online it */
1768 vd
[i
]->vdev_offline
= B_FALSE
;
1772 if (attempt_reopen
) {
1773 vdev_reopen(spa
->spa_root_vdev
);
1775 /* check each device to see what state it's in */
1776 for (extracted
= 0, i
= 0; i
< gcount
; i
++) {
1777 if (vd
[i
] != NULL
&&
1778 vd
[i
]->vdev_stat
.vs_aux
!= VDEV_AUX_SPLIT_POOL
)
1785 * If every disk has been moved to the new pool, or if we never
1786 * even attempted to look at them, then we split them off for
1789 if (!attempt_reopen
|| gcount
== extracted
) {
1790 for (i
= 0; i
< gcount
; i
++)
1793 vdev_reopen(spa
->spa_root_vdev
);
1796 kmem_free(vd
, gcount
* sizeof (vdev_t
*));
1800 spa_load(spa_t
*spa
, spa_load_state_t state
, spa_import_type_t type
,
1801 boolean_t mosconfig
)
1803 nvlist_t
*config
= spa
->spa_config
;
1804 char *ereport
= FM_EREPORT_ZFS_POOL
;
1810 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
, &pool_guid
))
1813 ASSERT(spa
->spa_comment
== NULL
);
1814 if (nvlist_lookup_string(config
, ZPOOL_CONFIG_COMMENT
, &comment
) == 0)
1815 spa
->spa_comment
= spa_strdup(comment
);
1818 * Versioning wasn't explicitly added to the label until later, so if
1819 * it's not present treat it as the initial version.
1821 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VERSION
,
1822 &spa
->spa_ubsync
.ub_version
) != 0)
1823 spa
->spa_ubsync
.ub_version
= SPA_VERSION_INITIAL
;
1825 (void) nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
1826 &spa
->spa_config_txg
);
1828 if ((state
== SPA_LOAD_IMPORT
|| state
== SPA_LOAD_TRYIMPORT
) &&
1829 spa_guid_exists(pool_guid
, 0)) {
1832 spa
->spa_config_guid
= pool_guid
;
1834 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
,
1836 VERIFY(nvlist_dup(nvl
, &spa
->spa_config_splitting
,
1840 gethrestime(&spa
->spa_loaded_ts
);
1841 error
= spa_load_impl(spa
, pool_guid
, config
, state
, type
,
1842 mosconfig
, &ereport
);
1845 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
1847 if (error
!= EEXIST
) {
1848 spa
->spa_loaded_ts
.tv_sec
= 0;
1849 spa
->spa_loaded_ts
.tv_nsec
= 0;
1851 if (error
!= EBADF
) {
1852 zfs_ereport_post(ereport
, spa
, NULL
, NULL
, 0, 0);
1855 spa
->spa_load_state
= error
? SPA_LOAD_ERROR
: SPA_LOAD_NONE
;
1862 * Load an existing storage pool, using the pool's builtin spa_config as a
1863 * source of configuration information.
1866 spa_load_impl(spa_t
*spa
, uint64_t pool_guid
, nvlist_t
*config
,
1867 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
1871 nvlist_t
*nvroot
= NULL
;
1873 uberblock_t
*ub
= &spa
->spa_uberblock
;
1874 uint64_t children
, config_cache_txg
= spa
->spa_config_txg
;
1875 int orig_mode
= spa
->spa_mode
;
1880 * If this is an untrusted config, access the pool in read-only mode.
1881 * This prevents things like resilvering recently removed devices.
1884 spa
->spa_mode
= FREAD
;
1886 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1888 spa
->spa_load_state
= state
;
1890 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvroot
))
1893 parse
= (type
== SPA_IMPORT_EXISTING
?
1894 VDEV_ALLOC_LOAD
: VDEV_ALLOC_SPLIT
);
1897 * Create "The Godfather" zio to hold all async IOs
1899 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
1900 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
1903 * Parse the configuration into a vdev tree. We explicitly set the
1904 * value that will be returned by spa_version() since parsing the
1905 * configuration requires knowing the version number.
1907 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1908 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, parse
);
1909 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1914 ASSERT(spa
->spa_root_vdev
== rvd
);
1916 if (type
!= SPA_IMPORT_ASSEMBLE
) {
1917 ASSERT(spa_guid(spa
) == pool_guid
);
1921 * Try to open all vdevs, loading each label in the process.
1923 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1924 error
= vdev_open(rvd
);
1925 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1930 * We need to validate the vdev labels against the configuration that
1931 * we have in hand, which is dependent on the setting of mosconfig. If
1932 * mosconfig is true then we're validating the vdev labels based on
1933 * that config. Otherwise, we're validating against the cached config
1934 * (zpool.cache) that was read when we loaded the zfs module, and then
1935 * later we will recursively call spa_load() and validate against
1938 * If we're assembling a new pool that's been split off from an
1939 * existing pool, the labels haven't yet been updated so we skip
1940 * validation for now.
1942 if (type
!= SPA_IMPORT_ASSEMBLE
) {
1943 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1944 error
= vdev_validate(rvd
, mosconfig
);
1945 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1950 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
1955 * Find the best uberblock.
1957 vdev_uberblock_load(NULL
, rvd
, ub
);
1960 * If we weren't able to find a single valid uberblock, return failure.
1962 if (ub
->ub_txg
== 0)
1963 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, ENXIO
));
1966 * If the pool is newer than the code, we can't open it.
1968 if (ub
->ub_version
> SPA_VERSION
)
1969 return (spa_vdev_err(rvd
, VDEV_AUX_VERSION_NEWER
, ENOTSUP
));
1972 * If the vdev guid sum doesn't match the uberblock, we have an
1973 * incomplete configuration. We first check to see if the pool
1974 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
1975 * If it is, defer the vdev_guid_sum check till later so we
1976 * can handle missing vdevs.
1978 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VDEV_CHILDREN
,
1979 &children
) != 0 && mosconfig
&& type
!= SPA_IMPORT_ASSEMBLE
&&
1980 rvd
->vdev_guid_sum
!= ub
->ub_guid_sum
)
1981 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
, ENXIO
));
1983 if (type
!= SPA_IMPORT_ASSEMBLE
&& spa
->spa_config_splitting
) {
1984 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1985 spa_try_repair(spa
, config
);
1986 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1987 nvlist_free(spa
->spa_config_splitting
);
1988 spa
->spa_config_splitting
= NULL
;
1992 * Initialize internal SPA structures.
1994 spa
->spa_state
= POOL_STATE_ACTIVE
;
1995 spa
->spa_ubsync
= spa
->spa_uberblock
;
1996 spa
->spa_verify_min_txg
= spa
->spa_extreme_rewind
?
1997 TXG_INITIAL
- 1 : spa_last_synced_txg(spa
) - TXG_DEFER_SIZE
- 1;
1998 spa
->spa_first_txg
= spa
->spa_last_ubsync_txg
?
1999 spa
->spa_last_ubsync_txg
: spa_last_synced_txg(spa
) + 1;
2000 spa
->spa_claim_max_txg
= spa
->spa_first_txg
;
2001 spa
->spa_prev_software_version
= ub
->ub_software_version
;
2003 error
= dsl_pool_open(spa
, spa
->spa_first_txg
, &spa
->spa_dsl_pool
);
2005 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2006 spa
->spa_meta_objset
= spa
->spa_dsl_pool
->dp_meta_objset
;
2008 if (spa_dir_prop(spa
, DMU_POOL_CONFIG
, &spa
->spa_config_object
) != 0)
2009 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2013 nvlist_t
*policy
= NULL
, *nvconfig
;
2015 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2016 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2018 if (!spa_is_root(spa
) && nvlist_lookup_uint64(nvconfig
,
2019 ZPOOL_CONFIG_HOSTID
, &hostid
) == 0) {
2021 unsigned long myhostid
= 0;
2023 VERIFY(nvlist_lookup_string(nvconfig
,
2024 ZPOOL_CONFIG_HOSTNAME
, &hostname
) == 0);
2027 myhostid
= zone_get_hostid(NULL
);
2030 * We're emulating the system's hostid in userland, so
2031 * we can't use zone_get_hostid().
2033 (void) ddi_strtoul(hw_serial
, NULL
, 10, &myhostid
);
2034 #endif /* _KERNEL */
2035 if (hostid
!= 0 && myhostid
!= 0 &&
2036 hostid
!= myhostid
) {
2037 nvlist_free(nvconfig
);
2038 cmn_err(CE_WARN
, "pool '%s' could not be "
2039 "loaded as it was last accessed by "
2040 "another system (host: %s hostid: 0x%lx). "
2041 "See: http://illumos.org/msg/ZFS-8000-EY",
2042 spa_name(spa
), hostname
,
2043 (unsigned long)hostid
);
2047 if (nvlist_lookup_nvlist(spa
->spa_config
,
2048 ZPOOL_REWIND_POLICY
, &policy
) == 0)
2049 VERIFY(nvlist_add_nvlist(nvconfig
,
2050 ZPOOL_REWIND_POLICY
, policy
) == 0);
2052 spa_config_set(spa
, nvconfig
);
2054 spa_deactivate(spa
);
2055 spa_activate(spa
, orig_mode
);
2057 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, B_TRUE
));
2060 if (spa_dir_prop(spa
, DMU_POOL_SYNC_BPOBJ
, &obj
) != 0)
2061 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2062 error
= bpobj_open(&spa
->spa_deferred_bpobj
, spa
->spa_meta_objset
, obj
);
2064 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2067 * Load the bit that tells us to use the new accounting function
2068 * (raid-z deflation). If we have an older pool, this will not
2071 error
= spa_dir_prop(spa
, DMU_POOL_DEFLATE
, &spa
->spa_deflate
);
2072 if (error
!= 0 && error
!= ENOENT
)
2073 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2075 error
= spa_dir_prop(spa
, DMU_POOL_CREATION_VERSION
,
2076 &spa
->spa_creation_version
);
2077 if (error
!= 0 && error
!= ENOENT
)
2078 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2081 * Load the persistent error log. If we have an older pool, this will
2084 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_LAST
, &spa
->spa_errlog_last
);
2085 if (error
!= 0 && error
!= ENOENT
)
2086 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2088 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_SCRUB
,
2089 &spa
->spa_errlog_scrub
);
2090 if (error
!= 0 && error
!= ENOENT
)
2091 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2094 * Load the history object. If we have an older pool, this
2095 * will not be present.
2097 error
= spa_dir_prop(spa
, DMU_POOL_HISTORY
, &spa
->spa_history
);
2098 if (error
!= 0 && error
!= ENOENT
)
2099 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2102 * If we're assembling the pool from the split-off vdevs of
2103 * an existing pool, we don't want to attach the spares & cache
2108 * Load any hot spares for this pool.
2110 error
= spa_dir_prop(spa
, DMU_POOL_SPARES
, &spa
->spa_spares
.sav_object
);
2111 if (error
!= 0 && error
!= ENOENT
)
2112 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2113 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2114 ASSERT(spa_version(spa
) >= SPA_VERSION_SPARES
);
2115 if (load_nvlist(spa
, spa
->spa_spares
.sav_object
,
2116 &spa
->spa_spares
.sav_config
) != 0)
2117 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2119 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2120 spa_load_spares(spa
);
2121 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2122 } else if (error
== 0) {
2123 spa
->spa_spares
.sav_sync
= B_TRUE
;
2127 * Load any level 2 ARC devices for this pool.
2129 error
= spa_dir_prop(spa
, DMU_POOL_L2CACHE
,
2130 &spa
->spa_l2cache
.sav_object
);
2131 if (error
!= 0 && error
!= ENOENT
)
2132 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2133 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2134 ASSERT(spa_version(spa
) >= SPA_VERSION_L2CACHE
);
2135 if (load_nvlist(spa
, spa
->spa_l2cache
.sav_object
,
2136 &spa
->spa_l2cache
.sav_config
) != 0)
2137 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2139 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2140 spa_load_l2cache(spa
);
2141 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2142 } else if (error
== 0) {
2143 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
2146 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
2148 error
= spa_dir_prop(spa
, DMU_POOL_PROPS
, &spa
->spa_pool_props_object
);
2149 if (error
&& error
!= ENOENT
)
2150 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2153 uint64_t autoreplace
;
2155 spa_prop_find(spa
, ZPOOL_PROP_BOOTFS
, &spa
->spa_bootfs
);
2156 spa_prop_find(spa
, ZPOOL_PROP_AUTOREPLACE
, &autoreplace
);
2157 spa_prop_find(spa
, ZPOOL_PROP_DELEGATION
, &spa
->spa_delegation
);
2158 spa_prop_find(spa
, ZPOOL_PROP_FAILUREMODE
, &spa
->spa_failmode
);
2159 spa_prop_find(spa
, ZPOOL_PROP_AUTOEXPAND
, &spa
->spa_autoexpand
);
2160 spa_prop_find(spa
, ZPOOL_PROP_DEDUPDITTO
,
2161 &spa
->spa_dedup_ditto
);
2163 spa
->spa_autoreplace
= (autoreplace
!= 0);
2167 * If the 'autoreplace' property is set, then post a resource notifying
2168 * the ZFS DE that it should not issue any faults for unopenable
2169 * devices. We also iterate over the vdevs, and post a sysevent for any
2170 * unopenable vdevs so that the normal autoreplace handler can take
2173 if (spa
->spa_autoreplace
&& state
!= SPA_LOAD_TRYIMPORT
) {
2174 spa_check_removed(spa
->spa_root_vdev
);
2176 * For the import case, this is done in spa_import(), because
2177 * at this point we're using the spare definitions from
2178 * the MOS config, not necessarily from the userland config.
2180 if (state
!= SPA_LOAD_IMPORT
) {
2181 spa_aux_check_removed(&spa
->spa_spares
);
2182 spa_aux_check_removed(&spa
->spa_l2cache
);
2187 * Load the vdev state for all toplevel vdevs.
2192 * Propagate the leaf DTLs we just loaded all the way up the tree.
2194 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2195 vdev_dtl_reassess(rvd
, 0, 0, B_FALSE
);
2196 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2199 * Load the DDTs (dedup tables).
2201 error
= ddt_load(spa
);
2203 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2205 spa_update_dspace(spa
);
2208 * Validate the config, using the MOS config to fill in any
2209 * information which might be missing. If we fail to validate
2210 * the config then declare the pool unfit for use. If we're
2211 * assembling a pool from a split, the log is not transferred
2214 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2217 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2218 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2220 if (!spa_config_valid(spa
, nvconfig
)) {
2221 nvlist_free(nvconfig
);
2222 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
,
2225 nvlist_free(nvconfig
);
2228 * Now that we've validate the config, check the state of the
2229 * root vdev. If it can't be opened, it indicates one or
2230 * more toplevel vdevs are faulted.
2232 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2235 if (spa_check_logs(spa
)) {
2236 *ereport
= FM_EREPORT_ZFS_LOG_REPLAY
;
2237 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_LOG
, ENXIO
));
2242 * We've successfully opened the pool, verify that we're ready
2243 * to start pushing transactions.
2245 if (state
!= SPA_LOAD_TRYIMPORT
) {
2246 if (error
= spa_load_verify(spa
))
2247 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2251 if (spa_writeable(spa
) && (state
== SPA_LOAD_RECOVER
||
2252 spa
->spa_load_max_txg
== UINT64_MAX
)) {
2254 int need_update
= B_FALSE
;
2256 ASSERT(state
!= SPA_LOAD_TRYIMPORT
);
2259 * Claim log blocks that haven't been committed yet.
2260 * This must all happen in a single txg.
2261 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2262 * invoked from zil_claim_log_block()'s i/o done callback.
2263 * Price of rollback is that we abandon the log.
2265 spa
->spa_claiming
= B_TRUE
;
2267 tx
= dmu_tx_create_assigned(spa_get_dsl(spa
),
2268 spa_first_txg(spa
));
2269 (void) dmu_objset_find(spa_name(spa
),
2270 zil_claim
, tx
, DS_FIND_CHILDREN
);
2273 spa
->spa_claiming
= B_FALSE
;
2275 spa_set_log_state(spa
, SPA_LOG_GOOD
);
2276 spa
->spa_sync_on
= B_TRUE
;
2277 txg_sync_start(spa
->spa_dsl_pool
);
2280 * Wait for all claims to sync. We sync up to the highest
2281 * claimed log block birth time so that claimed log blocks
2282 * don't appear to be from the future. spa_claim_max_txg
2283 * will have been set for us by either zil_check_log_chain()
2284 * (invoked from spa_check_logs()) or zil_claim() above.
2286 txg_wait_synced(spa
->spa_dsl_pool
, spa
->spa_claim_max_txg
);
2289 * If the config cache is stale, or we have uninitialized
2290 * metaslabs (see spa_vdev_add()), then update the config.
2292 * If this is a verbatim import, trust the current
2293 * in-core spa_config and update the disk labels.
2295 if (config_cache_txg
!= spa
->spa_config_txg
||
2296 state
== SPA_LOAD_IMPORT
||
2297 state
== SPA_LOAD_RECOVER
||
2298 (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
))
2299 need_update
= B_TRUE
;
2301 for (int c
= 0; c
< rvd
->vdev_children
; c
++)
2302 if (rvd
->vdev_child
[c
]->vdev_ms_array
== 0)
2303 need_update
= B_TRUE
;
2306 * Update the config cache asychronously in case we're the
2307 * root pool, in which case the config cache isn't writable yet.
2310 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
2313 * Check all DTLs to see if anything needs resilvering.
2315 if (!dsl_scan_resilvering(spa
->spa_dsl_pool
) &&
2316 vdev_resilver_needed(rvd
, NULL
, NULL
))
2317 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
2320 * Delete any inconsistent datasets.
2322 (void) dmu_objset_find(spa_name(spa
),
2323 dsl_destroy_inconsistent
, NULL
, DS_FIND_CHILDREN
);
2326 * Clean up any stale temporary dataset userrefs.
2328 dsl_pool_clean_tmp_userrefs(spa
->spa_dsl_pool
);
2335 spa_load_retry(spa_t
*spa
, spa_load_state_t state
, int mosconfig
)
2337 int mode
= spa
->spa_mode
;
2340 spa_deactivate(spa
);
2342 spa
->spa_load_max_txg
--;
2344 spa_activate(spa
, mode
);
2345 spa_async_suspend(spa
);
2347 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, mosconfig
));
2351 spa_load_best(spa_t
*spa
, spa_load_state_t state
, int mosconfig
,
2352 uint64_t max_request
, int rewind_flags
)
2354 nvlist_t
*config
= NULL
;
2355 int load_error
, rewind_error
;
2356 uint64_t safe_rewind_txg
;
2359 if (spa
->spa_load_txg
&& state
== SPA_LOAD_RECOVER
) {
2360 spa
->spa_load_max_txg
= spa
->spa_load_txg
;
2361 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2363 spa
->spa_load_max_txg
= max_request
;
2366 load_error
= rewind_error
= spa_load(spa
, state
, SPA_IMPORT_EXISTING
,
2368 if (load_error
== 0)
2371 if (spa
->spa_root_vdev
!= NULL
)
2372 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2374 spa
->spa_last_ubsync_txg
= spa
->spa_uberblock
.ub_txg
;
2375 spa
->spa_last_ubsync_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
2377 if (rewind_flags
& ZPOOL_NEVER_REWIND
) {
2378 nvlist_free(config
);
2379 return (load_error
);
2382 /* Price of rolling back is discarding txgs, including log */
2383 if (state
== SPA_LOAD_RECOVER
)
2384 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2386 spa
->spa_load_max_txg
= spa
->spa_last_ubsync_txg
;
2387 safe_rewind_txg
= spa
->spa_last_ubsync_txg
- TXG_DEFER_SIZE
;
2388 min_txg
= (rewind_flags
& ZPOOL_EXTREME_REWIND
) ?
2389 TXG_INITIAL
: safe_rewind_txg
;
2392 * Continue as long as we're finding errors, we're still within
2393 * the acceptable rewind range, and we're still finding uberblocks
2395 while (rewind_error
&& spa
->spa_uberblock
.ub_txg
>= min_txg
&&
2396 spa
->spa_uberblock
.ub_txg
<= spa
->spa_load_max_txg
) {
2397 if (spa
->spa_load_max_txg
< safe_rewind_txg
)
2398 spa
->spa_extreme_rewind
= B_TRUE
;
2399 rewind_error
= spa_load_retry(spa
, state
, mosconfig
);
2402 spa
->spa_extreme_rewind
= B_FALSE
;
2403 spa
->spa_load_max_txg
= UINT64_MAX
;
2405 if (config
&& (rewind_error
|| state
!= SPA_LOAD_RECOVER
))
2406 spa_config_set(spa
, config
);
2408 return (state
== SPA_LOAD_RECOVER
? rewind_error
: load_error
);
2414 * The import case is identical to an open except that the configuration is sent
2415 * down from userland, instead of grabbed from the configuration cache. For the
2416 * case of an open, the pool configuration will exist in the
2417 * POOL_STATE_UNINITIALIZED state.
2419 * The stats information (gen/count/ustats) is used to gather vdev statistics at
2420 * the same time open the pool, without having to keep around the spa_t in some
2424 spa_open_common(const char *pool
, spa_t
**spapp
, void *tag
, nvlist_t
*nvpolicy
,
2428 spa_load_state_t state
= SPA_LOAD_OPEN
;
2430 int locked
= B_FALSE
;
2435 * As disgusting as this is, we need to support recursive calls to this
2436 * function because dsl_dir_open() is called during spa_load(), and ends
2437 * up calling spa_open() again. The real fix is to figure out how to
2438 * avoid dsl_dir_open() calling this in the first place.
2440 if (mutex_owner(&spa_namespace_lock
) != curthread
) {
2441 mutex_enter(&spa_namespace_lock
);
2445 if ((spa
= spa_lookup(pool
)) == NULL
) {
2447 mutex_exit(&spa_namespace_lock
);
2451 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
) {
2452 zpool_rewind_policy_t policy
;
2454 zpool_get_rewind_policy(nvpolicy
? nvpolicy
: spa
->spa_config
,
2456 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
2457 state
= SPA_LOAD_RECOVER
;
2459 spa_activate(spa
, spa_mode_global
);
2461 if (state
!= SPA_LOAD_RECOVER
)
2462 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
2464 error
= spa_load_best(spa
, state
, B_FALSE
, policy
.zrp_txg
,
2465 policy
.zrp_request
);
2467 if (error
== EBADF
) {
2469 * If vdev_validate() returns failure (indicated by
2470 * EBADF), it indicates that one of the vdevs indicates
2471 * that the pool has been exported or destroyed. If
2472 * this is the case, the config cache is out of sync and
2473 * we should remove the pool from the namespace.
2476 spa_deactivate(spa
);
2477 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
2480 mutex_exit(&spa_namespace_lock
);
2486 * We can't open the pool, but we still have useful
2487 * information: the state of each vdev after the
2488 * attempted vdev_open(). Return this to the user.
2490 if (config
!= NULL
&& spa
->spa_config
) {
2491 VERIFY(nvlist_dup(spa
->spa_config
, config
,
2493 VERIFY(nvlist_add_nvlist(*config
,
2494 ZPOOL_CONFIG_LOAD_INFO
,
2495 spa
->spa_load_info
) == 0);
2498 spa_deactivate(spa
);
2499 spa
->spa_last_open_failed
= error
;
2501 mutex_exit(&spa_namespace_lock
);
2507 spa_open_ref(spa
, tag
);
2510 *config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2513 * If we've recovered the pool, pass back any information we
2514 * gathered while doing the load.
2516 if (state
== SPA_LOAD_RECOVER
) {
2517 VERIFY(nvlist_add_nvlist(*config
, ZPOOL_CONFIG_LOAD_INFO
,
2518 spa
->spa_load_info
) == 0);
2522 spa
->spa_last_open_failed
= 0;
2523 spa
->spa_last_ubsync_txg
= 0;
2524 spa
->spa_load_txg
= 0;
2525 mutex_exit(&spa_namespace_lock
);
2534 spa_open_rewind(const char *name
, spa_t
**spapp
, void *tag
, nvlist_t
*policy
,
2537 return (spa_open_common(name
, spapp
, tag
, policy
, config
));
2541 spa_open(const char *name
, spa_t
**spapp
, void *tag
)
2543 return (spa_open_common(name
, spapp
, tag
, NULL
, NULL
));
2547 * Lookup the given spa_t, incrementing the inject count in the process,
2548 * preventing it from being exported or destroyed.
2551 spa_inject_addref(char *name
)
2555 mutex_enter(&spa_namespace_lock
);
2556 if ((spa
= spa_lookup(name
)) == NULL
) {
2557 mutex_exit(&spa_namespace_lock
);
2560 spa
->spa_inject_ref
++;
2561 mutex_exit(&spa_namespace_lock
);
2567 spa_inject_delref(spa_t
*spa
)
2569 mutex_enter(&spa_namespace_lock
);
2570 spa
->spa_inject_ref
--;
2571 mutex_exit(&spa_namespace_lock
);
2575 * Add spares device information to the nvlist.
2578 spa_add_spares(spa_t
*spa
, nvlist_t
*config
)
2588 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2590 if (spa
->spa_spares
.sav_count
== 0)
2593 VERIFY(nvlist_lookup_nvlist(config
,
2594 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2595 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
2596 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2598 VERIFY(nvlist_add_nvlist_array(nvroot
,
2599 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
2600 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2601 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
2604 * Go through and find any spares which have since been
2605 * repurposed as an active spare. If this is the case, update
2606 * their status appropriately.
2608 for (i
= 0; i
< nspares
; i
++) {
2609 VERIFY(nvlist_lookup_uint64(spares
[i
],
2610 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2611 if (spa_spare_exists(guid
, &pool
, NULL
) &&
2613 VERIFY(nvlist_lookup_uint64_array(
2614 spares
[i
], ZPOOL_CONFIG_VDEV_STATS
,
2615 (uint64_t **)&vs
, &vsc
) == 0);
2616 vs
->vs_state
= VDEV_STATE_CANT_OPEN
;
2617 vs
->vs_aux
= VDEV_AUX_SPARED
;
2624 * Add l2cache device information to the nvlist, including vdev stats.
2627 spa_add_l2cache(spa_t
*spa
, nvlist_t
*config
)
2630 uint_t i
, j
, nl2cache
;
2637 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
2639 if (spa
->spa_l2cache
.sav_count
== 0)
2642 VERIFY(nvlist_lookup_nvlist(config
,
2643 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
2644 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
2645 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2646 if (nl2cache
!= 0) {
2647 VERIFY(nvlist_add_nvlist_array(nvroot
,
2648 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
2649 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
2650 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
2653 * Update level 2 cache device stats.
2656 for (i
= 0; i
< nl2cache
; i
++) {
2657 VERIFY(nvlist_lookup_uint64(l2cache
[i
],
2658 ZPOOL_CONFIG_GUID
, &guid
) == 0);
2661 for (j
= 0; j
< spa
->spa_l2cache
.sav_count
; j
++) {
2663 spa
->spa_l2cache
.sav_vdevs
[j
]->vdev_guid
) {
2664 vd
= spa
->spa_l2cache
.sav_vdevs
[j
];
2670 VERIFY(nvlist_lookup_uint64_array(l2cache
[i
],
2671 ZPOOL_CONFIG_VDEV_STATS
, (uint64_t **)&vs
, &vsc
)
2673 vdev_get_stats(vd
, vs
);
2679 spa_get_stats(const char *name
, nvlist_t
**config
, char *altroot
, size_t buflen
)
2685 error
= spa_open_common(name
, &spa
, FTAG
, NULL
, config
);
2689 * This still leaves a window of inconsistency where the spares
2690 * or l2cache devices could change and the config would be
2691 * self-inconsistent.
2693 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
2695 if (*config
!= NULL
) {
2696 uint64_t loadtimes
[2];
2698 loadtimes
[0] = spa
->spa_loaded_ts
.tv_sec
;
2699 loadtimes
[1] = spa
->spa_loaded_ts
.tv_nsec
;
2700 VERIFY(nvlist_add_uint64_array(*config
,
2701 ZPOOL_CONFIG_LOADED_TIME
, loadtimes
, 2) == 0);
2703 VERIFY(nvlist_add_uint64(*config
,
2704 ZPOOL_CONFIG_ERRCOUNT
,
2705 spa_get_errlog_size(spa
)) == 0);
2707 if (spa_suspended(spa
))
2708 VERIFY(nvlist_add_uint64(*config
,
2709 ZPOOL_CONFIG_SUSPENDED
,
2710 spa
->spa_failmode
) == 0);
2712 spa_add_spares(spa
, *config
);
2713 spa_add_l2cache(spa
, *config
);
2718 * We want to get the alternate root even for faulted pools, so we cheat
2719 * and call spa_lookup() directly.
2723 mutex_enter(&spa_namespace_lock
);
2724 spa
= spa_lookup(name
);
2726 spa_altroot(spa
, altroot
, buflen
);
2730 mutex_exit(&spa_namespace_lock
);
2732 spa_altroot(spa
, altroot
, buflen
);
2737 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
2738 spa_close(spa
, FTAG
);
2745 * Validate that the auxiliary device array is well formed. We must have an
2746 * array of nvlists, each which describes a valid leaf vdev. If this is an
2747 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
2748 * specified, as long as they are well-formed.
2751 spa_validate_aux_devs(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
,
2752 spa_aux_vdev_t
*sav
, const char *config
, uint64_t version
,
2753 vdev_labeltype_t label
)
2760 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
2763 * It's acceptable to have no devs specified.
2765 if (nvlist_lookup_nvlist_array(nvroot
, config
, &dev
, &ndev
) != 0)
2772 * Make sure the pool is formatted with a version that supports this
2775 if (spa_version(spa
) < version
)
2779 * Set the pending device list so we correctly handle device in-use
2782 sav
->sav_pending
= dev
;
2783 sav
->sav_npending
= ndev
;
2785 for (i
= 0; i
< ndev
; i
++) {
2786 if ((error
= spa_config_parse(spa
, &vd
, dev
[i
], NULL
, 0,
2790 if (!vd
->vdev_ops
->vdev_op_leaf
) {
2797 * The L2ARC currently only supports disk devices in
2798 * kernel context. For user-level testing, we allow it.
2801 if ((strcmp(config
, ZPOOL_CONFIG_L2CACHE
) == 0) &&
2802 strcmp(vd
->vdev_ops
->vdev_op_type
, VDEV_TYPE_DISK
) != 0) {
2810 if ((error
= vdev_open(vd
)) == 0 &&
2811 (error
= vdev_label_init(vd
, crtxg
, label
)) == 0) {
2812 VERIFY(nvlist_add_uint64(dev
[i
], ZPOOL_CONFIG_GUID
,
2813 vd
->vdev_guid
) == 0);
2819 (mode
!= VDEV_ALLOC_SPARE
&& mode
!= VDEV_ALLOC_L2CACHE
))
2826 sav
->sav_pending
= NULL
;
2827 sav
->sav_npending
= 0;
2832 spa_validate_aux(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
)
2836 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
2838 if ((error
= spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
2839 &spa
->spa_spares
, ZPOOL_CONFIG_SPARES
, SPA_VERSION_SPARES
,
2840 VDEV_LABEL_SPARE
)) != 0) {
2844 return (spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
2845 &spa
->spa_l2cache
, ZPOOL_CONFIG_L2CACHE
, SPA_VERSION_L2CACHE
,
2846 VDEV_LABEL_L2CACHE
));
2850 spa_set_aux_vdevs(spa_aux_vdev_t
*sav
, nvlist_t
**devs
, int ndevs
,
2855 if (sav
->sav_config
!= NULL
) {
2861 * Generate new dev list by concatentating with the
2864 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
, config
,
2865 &olddevs
, &oldndevs
) == 0);
2867 newdevs
= kmem_alloc(sizeof (void *) *
2868 (ndevs
+ oldndevs
), KM_SLEEP
);
2869 for (i
= 0; i
< oldndevs
; i
++)
2870 VERIFY(nvlist_dup(olddevs
[i
], &newdevs
[i
],
2872 for (i
= 0; i
< ndevs
; i
++)
2873 VERIFY(nvlist_dup(devs
[i
], &newdevs
[i
+ oldndevs
],
2876 VERIFY(nvlist_remove(sav
->sav_config
, config
,
2877 DATA_TYPE_NVLIST_ARRAY
) == 0);
2879 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
2880 config
, newdevs
, ndevs
+ oldndevs
) == 0);
2881 for (i
= 0; i
< oldndevs
+ ndevs
; i
++)
2882 nvlist_free(newdevs
[i
]);
2883 kmem_free(newdevs
, (oldndevs
+ ndevs
) * sizeof (void *));
2886 * Generate a new dev list.
2888 VERIFY(nvlist_alloc(&sav
->sav_config
, NV_UNIQUE_NAME
,
2890 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
, config
,
2896 * Stop and drop level 2 ARC devices
2899 spa_l2cache_drop(spa_t
*spa
)
2903 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
2905 for (i
= 0; i
< sav
->sav_count
; i
++) {
2908 vd
= sav
->sav_vdevs
[i
];
2911 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
2912 pool
!= 0ULL && l2arc_vdev_present(vd
))
2913 l2arc_remove_vdev(vd
);
2921 spa_create(const char *pool
, nvlist_t
*nvroot
, nvlist_t
*props
,
2922 const char *history_str
, nvlist_t
*zplprops
)
2925 char *altroot
= NULL
;
2930 uint64_t txg
= TXG_INITIAL
;
2931 nvlist_t
**spares
, **l2cache
;
2932 uint_t nspares
, nl2cache
;
2933 uint64_t version
, obj
;
2936 * If this pool already exists, return failure.
2938 mutex_enter(&spa_namespace_lock
);
2939 if (spa_lookup(pool
) != NULL
) {
2940 mutex_exit(&spa_namespace_lock
);
2945 * Allocate a new spa_t structure.
2947 (void) nvlist_lookup_string(props
,
2948 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
2949 spa
= spa_add(pool
, NULL
, altroot
);
2950 spa_activate(spa
, spa_mode_global
);
2952 if (props
&& (error
= spa_prop_validate(spa
, props
))) {
2953 spa_deactivate(spa
);
2955 mutex_exit(&spa_namespace_lock
);
2959 if (nvlist_lookup_uint64(props
, zpool_prop_to_name(ZPOOL_PROP_VERSION
),
2961 version
= SPA_VERSION
;
2962 ASSERT(version
<= SPA_VERSION
);
2964 spa
->spa_first_txg
= txg
;
2965 spa
->spa_uberblock
.ub_txg
= txg
- 1;
2966 spa
->spa_uberblock
.ub_version
= version
;
2967 spa
->spa_ubsync
= spa
->spa_uberblock
;
2970 * Create "The Godfather" zio to hold all async IOs
2972 spa
->spa_async_zio_root
= zio_root(spa
, NULL
, NULL
,
2973 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_GODFATHER
);
2976 * Create the root vdev.
2978 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2980 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, VDEV_ALLOC_ADD
);
2982 ASSERT(error
!= 0 || rvd
!= NULL
);
2983 ASSERT(error
!= 0 || spa
->spa_root_vdev
== rvd
);
2985 if (error
== 0 && !zfs_allocatable_devs(nvroot
))
2989 (error
= vdev_create(rvd
, txg
, B_FALSE
)) == 0 &&
2990 (error
= spa_validate_aux(spa
, nvroot
, txg
,
2991 VDEV_ALLOC_ADD
)) == 0) {
2992 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
2993 vdev_metaslab_set_size(rvd
->vdev_child
[c
]);
2994 vdev_expand(rvd
->vdev_child
[c
], txg
);
2998 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3002 spa_deactivate(spa
);
3004 mutex_exit(&spa_namespace_lock
);
3009 * Get the list of spares, if specified.
3011 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3012 &spares
, &nspares
) == 0) {
3013 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
, NV_UNIQUE_NAME
,
3015 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3016 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3017 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3018 spa_load_spares(spa
);
3019 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3020 spa
->spa_spares
.sav_sync
= B_TRUE
;
3024 * Get the list of level 2 cache devices, if specified.
3026 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3027 &l2cache
, &nl2cache
) == 0) {
3028 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3029 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3030 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3031 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3032 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3033 spa_load_l2cache(spa
);
3034 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3035 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3038 spa
->spa_dsl_pool
= dp
= dsl_pool_create(spa
, zplprops
, txg
);
3039 spa
->spa_meta_objset
= dp
->dp_meta_objset
;
3042 * Create DDTs (dedup tables).
3046 spa_update_dspace(spa
);
3048 tx
= dmu_tx_create_assigned(dp
, txg
);
3051 * Create the pool config object.
3053 spa
->spa_config_object
= dmu_object_alloc(spa
->spa_meta_objset
,
3054 DMU_OT_PACKED_NVLIST
, SPA_CONFIG_BLOCKSIZE
,
3055 DMU_OT_PACKED_NVLIST_SIZE
, sizeof (uint64_t), tx
);
3057 if (zap_add(spa
->spa_meta_objset
,
3058 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CONFIG
,
3059 sizeof (uint64_t), 1, &spa
->spa_config_object
, tx
) != 0) {
3060 cmn_err(CE_PANIC
, "failed to add pool config");
3063 if (zap_add(spa
->spa_meta_objset
,
3064 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CREATION_VERSION
,
3065 sizeof (uint64_t), 1, &version
, tx
) != 0) {
3066 cmn_err(CE_PANIC
, "failed to add pool version");
3069 /* Newly created pools with the right version are always deflated. */
3070 if (version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
3071 spa
->spa_deflate
= TRUE
;
3072 if (zap_add(spa
->spa_meta_objset
,
3073 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
3074 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
) != 0) {
3075 cmn_err(CE_PANIC
, "failed to add deflate");
3080 * Create the deferred-free bpobj. Turn off compression
3081 * because sync-to-convergence takes longer if the blocksize
3084 obj
= bpobj_alloc(spa
->spa_meta_objset
, 1 << 14, tx
);
3085 dmu_object_set_compress(spa
->spa_meta_objset
, obj
,
3086 ZIO_COMPRESS_OFF
, tx
);
3087 if (zap_add(spa
->spa_meta_objset
,
3088 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_SYNC_BPOBJ
,
3089 sizeof (uint64_t), 1, &obj
, tx
) != 0) {
3090 cmn_err(CE_PANIC
, "failed to add bpobj");
3092 VERIFY3U(0, ==, bpobj_open(&spa
->spa_deferred_bpobj
,
3093 spa
->spa_meta_objset
, obj
));
3096 * Create the pool's history object.
3098 if (version
>= SPA_VERSION_ZPOOL_HISTORY
)
3099 spa_history_create_obj(spa
, tx
);
3102 * Set pool properties.
3104 spa
->spa_bootfs
= zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS
);
3105 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
3106 spa
->spa_failmode
= zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE
);
3107 spa
->spa_autoexpand
= zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND
);
3109 if (props
!= NULL
) {
3110 spa_configfile_set(spa
, props
, B_FALSE
);
3111 spa_sync_props(spa
, props
, tx
);
3116 spa
->spa_sync_on
= B_TRUE
;
3117 txg_sync_start(spa
->spa_dsl_pool
);
3120 * We explicitly wait for the first transaction to complete so that our
3121 * bean counters are appropriately updated.
3123 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
3125 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3127 if (version
>= SPA_VERSION_ZPOOL_HISTORY
&& history_str
!= NULL
)
3128 (void) spa_history_log(spa
, history_str
, LOG_CMD_POOL_CREATE
);
3129 spa_history_log_version(spa
, LOG_POOL_CREATE
);
3131 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
3133 mutex_exit(&spa_namespace_lock
);
3140 * Get the root pool information from the root disk, then import the root pool
3141 * during the system boot up time.
3143 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t
**);
3146 spa_generate_rootconf(char *devpath
, char *devid
, uint64_t *guid
)
3149 nvlist_t
*nvtop
, *nvroot
;
3152 if (vdev_disk_read_rootlabel(devpath
, devid
, &config
) != 0)
3156 * Add this top-level vdev to the child array.
3158 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3160 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
3162 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_GUID
, guid
) == 0);
3165 * Put this pool's top-level vdevs into a root vdev.
3167 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3168 VERIFY(nvlist_add_string(nvroot
, ZPOOL_CONFIG_TYPE
,
3169 VDEV_TYPE_ROOT
) == 0);
3170 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_ID
, 0ULL) == 0);
3171 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_GUID
, pgid
) == 0);
3172 VERIFY(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
3176 * Replace the existing vdev_tree with the new root vdev in
3177 * this pool's configuration (remove the old, add the new).
3179 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, nvroot
) == 0);
3180 nvlist_free(nvroot
);
3185 * Walk the vdev tree and see if we can find a device with "better"
3186 * configuration. A configuration is "better" if the label on that
3187 * device has a more recent txg.
3190 spa_alt_rootvdev(vdev_t
*vd
, vdev_t
**avd
, uint64_t *txg
)
3192 for (int c
= 0; c
< vd
->vdev_children
; c
++)
3193 spa_alt_rootvdev(vd
->vdev_child
[c
], avd
, txg
);
3195 if (vd
->vdev_ops
->vdev_op_leaf
) {
3199 if (vdev_disk_read_rootlabel(vd
->vdev_physpath
, vd
->vdev_devid
,
3203 VERIFY(nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_TXG
,
3207 * Do we have a better boot device?
3209 if (label_txg
> *txg
) {
3218 * Import a root pool.
3220 * For x86. devpath_list will consist of devid and/or physpath name of
3221 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3222 * The GRUB "findroot" command will return the vdev we should boot.
3224 * For Sparc, devpath_list consists the physpath name of the booting device
3225 * no matter the rootpool is a single device pool or a mirrored pool.
3227 * "/pci@1f,0/ide@d/disk@0,0:a"
3230 spa_import_rootpool(char *devpath
, char *devid
)
3233 vdev_t
*rvd
, *bvd
, *avd
= NULL
;
3234 nvlist_t
*config
, *nvtop
;
3240 * Read the label from the boot device and generate a configuration.
3242 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3243 #if defined(_OBP) && defined(_KERNEL)
3244 if (config
== NULL
) {
3245 if (strstr(devpath
, "/iscsi/ssd") != NULL
) {
3247 get_iscsi_bootpath_phy(devpath
);
3248 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3252 if (config
== NULL
) {
3253 cmn_err(CE_NOTE
, "Can not read the pool label from '%s'",
3258 VERIFY(nvlist_lookup_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3260 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
, &txg
) == 0);
3262 mutex_enter(&spa_namespace_lock
);
3263 if ((spa
= spa_lookup(pname
)) != NULL
) {
3265 * Remove the existing root pool from the namespace so that we
3266 * can replace it with the correct config we just read in.
3271 spa
= spa_add(pname
, config
, NULL
);
3272 spa
->spa_is_root
= B_TRUE
;
3273 spa
->spa_import_flags
= ZFS_IMPORT_VERBATIM
;
3276 * Build up a vdev tree based on the boot device's label config.
3278 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3280 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3281 error
= spa_config_parse(spa
, &rvd
, nvtop
, NULL
, 0,
3282 VDEV_ALLOC_ROOTPOOL
);
3283 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3285 mutex_exit(&spa_namespace_lock
);
3286 nvlist_free(config
);
3287 cmn_err(CE_NOTE
, "Can not parse the config for pool '%s'",
3293 * Get the boot vdev.
3295 if ((bvd
= vdev_lookup_by_guid(rvd
, guid
)) == NULL
) {
3296 cmn_err(CE_NOTE
, "Can not find the boot vdev for guid %llu",
3297 (u_longlong_t
)guid
);
3303 * Determine if there is a better boot device.
3306 spa_alt_rootvdev(rvd
, &avd
, &txg
);
3308 cmn_err(CE_NOTE
, "The boot device is 'degraded'. Please "
3309 "try booting from '%s'", avd
->vdev_path
);
3315 * If the boot device is part of a spare vdev then ensure that
3316 * we're booting off the active spare.
3318 if (bvd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
3319 !bvd
->vdev_isspare
) {
3320 cmn_err(CE_NOTE
, "The boot device is currently spared. Please "
3321 "try booting from '%s'",
3323 vdev_child
[bvd
->vdev_parent
->vdev_children
- 1]->vdev_path
);
3329 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3331 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3333 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3334 mutex_exit(&spa_namespace_lock
);
3336 nvlist_free(config
);
3343 * Import a non-root pool into the system.
3346 spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
, uint64_t flags
)
3349 char *altroot
= NULL
;
3350 spa_load_state_t state
= SPA_LOAD_IMPORT
;
3351 zpool_rewind_policy_t policy
;
3352 uint64_t mode
= spa_mode_global
;
3353 uint64_t readonly
= B_FALSE
;
3356 nvlist_t
**spares
, **l2cache
;
3357 uint_t nspares
, nl2cache
;
3360 * If a pool with this name exists, return failure.
3362 mutex_enter(&spa_namespace_lock
);
3363 if (spa_lookup(pool
) != NULL
) {
3364 mutex_exit(&spa_namespace_lock
);
3369 * Create and initialize the spa structure.
3371 (void) nvlist_lookup_string(props
,
3372 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3373 (void) nvlist_lookup_uint64(props
,
3374 zpool_prop_to_name(ZPOOL_PROP_READONLY
), &readonly
);
3377 spa
= spa_add(pool
, config
, altroot
);
3378 spa
->spa_import_flags
= flags
;
3381 * Verbatim import - Take a pool and insert it into the namespace
3382 * as if it had been loaded at boot.
3384 if (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) {
3386 spa_configfile_set(spa
, props
, B_FALSE
);
3388 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3390 mutex_exit(&spa_namespace_lock
);
3391 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3396 spa_activate(spa
, mode
);
3399 * Don't start async tasks until we know everything is healthy.
3401 spa_async_suspend(spa
);
3403 zpool_get_rewind_policy(config
, &policy
);
3404 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
3405 state
= SPA_LOAD_RECOVER
;
3408 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
3409 * because the user-supplied config is actually the one to trust when
3412 if (state
!= SPA_LOAD_RECOVER
)
3413 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
3415 error
= spa_load_best(spa
, state
, B_TRUE
, policy
.zrp_txg
,
3416 policy
.zrp_request
);
3419 * Propagate anything learned while loading the pool and pass it
3420 * back to caller (i.e. rewind info, missing devices, etc).
3422 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
3423 spa
->spa_load_info
) == 0);
3425 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3427 * Toss any existing sparelist, as it doesn't have any validity
3428 * anymore, and conflicts with spa_has_spare().
3430 if (spa
->spa_spares
.sav_config
) {
3431 nvlist_free(spa
->spa_spares
.sav_config
);
3432 spa
->spa_spares
.sav_config
= NULL
;
3433 spa_load_spares(spa
);
3435 if (spa
->spa_l2cache
.sav_config
) {
3436 nvlist_free(spa
->spa_l2cache
.sav_config
);
3437 spa
->spa_l2cache
.sav_config
= NULL
;
3438 spa_load_l2cache(spa
);
3441 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3444 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3447 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
3448 VDEV_ALLOC_L2CACHE
);
3449 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3452 spa_configfile_set(spa
, props
, B_FALSE
);
3454 if (error
!= 0 || (props
&& spa_writeable(spa
) &&
3455 (error
= spa_prop_set(spa
, props
)))) {
3457 spa_deactivate(spa
);
3459 mutex_exit(&spa_namespace_lock
);
3463 spa_async_resume(spa
);
3466 * Override any spares and level 2 cache devices as specified by
3467 * the user, as these may have correct device names/devids, etc.
3469 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3470 &spares
, &nspares
) == 0) {
3471 if (spa
->spa_spares
.sav_config
)
3472 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
,
3473 ZPOOL_CONFIG_SPARES
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3475 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
,
3476 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3477 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3478 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3479 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3480 spa_load_spares(spa
);
3481 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3482 spa
->spa_spares
.sav_sync
= B_TRUE
;
3484 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3485 &l2cache
, &nl2cache
) == 0) {
3486 if (spa
->spa_l2cache
.sav_config
)
3487 VERIFY(nvlist_remove(spa
->spa_l2cache
.sav_config
,
3488 ZPOOL_CONFIG_L2CACHE
, DATA_TYPE_NVLIST_ARRAY
) == 0);
3490 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3491 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3492 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3493 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3494 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3495 spa_load_l2cache(spa
);
3496 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3497 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3501 * Check for any removed devices.
3503 if (spa
->spa_autoreplace
) {
3504 spa_aux_check_removed(&spa
->spa_spares
);
3505 spa_aux_check_removed(&spa
->spa_l2cache
);
3508 if (spa_writeable(spa
)) {
3510 * Update the config cache to include the newly-imported pool.
3512 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
3516 * It's possible that the pool was expanded while it was exported.
3517 * We kick off an async task to handle this for us.
3519 spa_async_request(spa
, SPA_ASYNC_AUTOEXPAND
);
3521 mutex_exit(&spa_namespace_lock
);
3522 spa_history_log_version(spa
, LOG_POOL_IMPORT
);
3528 spa_tryimport(nvlist_t
*tryconfig
)
3530 nvlist_t
*config
= NULL
;
3536 if (nvlist_lookup_string(tryconfig
, ZPOOL_CONFIG_POOL_NAME
, &poolname
))
3539 if (nvlist_lookup_uint64(tryconfig
, ZPOOL_CONFIG_POOL_STATE
, &state
))
3543 * Create and initialize the spa structure.
3545 mutex_enter(&spa_namespace_lock
);
3546 spa
= spa_add(TRYIMPORT_NAME
, tryconfig
, NULL
);
3547 spa_activate(spa
, FREAD
);
3550 * Pass off the heavy lifting to spa_load().
3551 * Pass TRUE for mosconfig because the user-supplied config
3552 * is actually the one to trust when doing an import.
3554 error
= spa_load(spa
, SPA_LOAD_TRYIMPORT
, SPA_IMPORT_EXISTING
, B_TRUE
);
3557 * If 'tryconfig' was at least parsable, return the current config.
3559 if (spa
->spa_root_vdev
!= NULL
) {
3560 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
3561 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3563 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
3565 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_TIMESTAMP
,
3566 spa
->spa_uberblock
.ub_timestamp
) == 0);
3569 * If the bootfs property exists on this pool then we
3570 * copy it out so that external consumers can tell which
3571 * pools are bootable.
3573 if ((!error
|| error
== EEXIST
) && spa
->spa_bootfs
) {
3574 char *tmpname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
3577 * We have to play games with the name since the
3578 * pool was opened as TRYIMPORT_NAME.
3580 if (dsl_dsobj_to_dsname(spa_name(spa
),
3581 spa
->spa_bootfs
, tmpname
) == 0) {
3583 char *dsname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
3585 cp
= strchr(tmpname
, '/');
3587 (void) strlcpy(dsname
, tmpname
,
3590 (void) snprintf(dsname
, MAXPATHLEN
,
3591 "%s/%s", poolname
, ++cp
);
3593 VERIFY(nvlist_add_string(config
,
3594 ZPOOL_CONFIG_BOOTFS
, dsname
) == 0);
3595 kmem_free(dsname
, MAXPATHLEN
);
3597 kmem_free(tmpname
, MAXPATHLEN
);
3601 * Add the list of hot spares and level 2 cache devices.
3603 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3604 spa_add_spares(spa
, config
);
3605 spa_add_l2cache(spa
, config
);
3606 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3610 spa_deactivate(spa
);
3612 mutex_exit(&spa_namespace_lock
);
3618 * Pool export/destroy
3620 * The act of destroying or exporting a pool is very simple. We make sure there
3621 * is no more pending I/O and any references to the pool are gone. Then, we
3622 * update the pool state and sync all the labels to disk, removing the
3623 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
3624 * we don't sync the labels or remove the configuration cache.
3627 spa_export_common(char *pool
, int new_state
, nvlist_t
**oldconfig
,
3628 boolean_t force
, boolean_t hardforce
)
3635 if (!(spa_mode_global
& FWRITE
))
3638 mutex_enter(&spa_namespace_lock
);
3639 if ((spa
= spa_lookup(pool
)) == NULL
) {
3640 mutex_exit(&spa_namespace_lock
);
3645 * Put a hold on the pool, drop the namespace lock, stop async tasks,
3646 * reacquire the namespace lock, and see if we can export.
3648 spa_open_ref(spa
, FTAG
);
3649 mutex_exit(&spa_namespace_lock
);
3650 spa_async_suspend(spa
);
3651 mutex_enter(&spa_namespace_lock
);
3652 spa_close(spa
, FTAG
);
3655 * The pool will be in core if it's openable,
3656 * in which case we can modify its state.
3658 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
&& spa
->spa_sync_on
) {
3660 * Objsets may be open only because they're dirty, so we
3661 * have to force it to sync before checking spa_refcnt.
3663 txg_wait_synced(spa
->spa_dsl_pool
, 0);
3666 * A pool cannot be exported or destroyed if there are active
3667 * references. If we are resetting a pool, allow references by
3668 * fault injection handlers.
3670 if (!spa_refcount_zero(spa
) ||
3671 (spa
->spa_inject_ref
!= 0 &&
3672 new_state
!= POOL_STATE_UNINITIALIZED
)) {
3673 spa_async_resume(spa
);
3674 mutex_exit(&spa_namespace_lock
);
3679 * A pool cannot be exported if it has an active shared spare.
3680 * This is to prevent other pools stealing the active spare
3681 * from an exported pool. At user's own will, such pool can
3682 * be forcedly exported.
3684 if (!force
&& new_state
== POOL_STATE_EXPORTED
&&
3685 spa_has_active_shared_spare(spa
)) {
3686 spa_async_resume(spa
);
3687 mutex_exit(&spa_namespace_lock
);
3692 * We want this to be reflected on every label,
3693 * so mark them all dirty. spa_unload() will do the
3694 * final sync that pushes these changes out.
3696 if (new_state
!= POOL_STATE_UNINITIALIZED
&& !hardforce
) {
3697 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3698 spa
->spa_state
= new_state
;
3699 spa
->spa_final_txg
= spa_last_synced_txg(spa
) +
3701 vdev_config_dirty(spa
->spa_root_vdev
);
3702 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3706 spa_event_notify(spa
, NULL
, ESC_ZFS_POOL_DESTROY
);
3708 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
3710 spa_deactivate(spa
);
3713 if (oldconfig
&& spa
->spa_config
)
3714 VERIFY(nvlist_dup(spa
->spa_config
, oldconfig
, 0) == 0);
3716 if (new_state
!= POOL_STATE_UNINITIALIZED
) {
3718 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
3721 mutex_exit(&spa_namespace_lock
);
3727 * Destroy a storage pool.
3730 spa_destroy(char *pool
)
3732 return (spa_export_common(pool
, POOL_STATE_DESTROYED
, NULL
,
3737 * Export a storage pool.
3740 spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
3741 boolean_t hardforce
)
3743 return (spa_export_common(pool
, POOL_STATE_EXPORTED
, oldconfig
,
3748 * Similar to spa_export(), this unloads the spa_t without actually removing it
3749 * from the namespace in any way.
3752 spa_reset(char *pool
)
3754 return (spa_export_common(pool
, POOL_STATE_UNINITIALIZED
, NULL
,
3759 * ==========================================================================
3760 * Device manipulation
3761 * ==========================================================================
3765 * Add a device to a storage pool.
3768 spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
)
3772 vdev_t
*rvd
= spa
->spa_root_vdev
;
3774 nvlist_t
**spares
, **l2cache
;
3775 uint_t nspares
, nl2cache
;
3777 ASSERT(spa_writeable(spa
));
3779 txg
= spa_vdev_enter(spa
);
3781 if ((error
= spa_config_parse(spa
, &vd
, nvroot
, NULL
, 0,
3782 VDEV_ALLOC_ADD
)) != 0)
3783 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
3785 spa
->spa_pending_vdev
= vd
; /* spa_vdev_exit() will clear this */
3787 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
, &spares
,
3791 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
, &l2cache
,
3795 if (vd
->vdev_children
== 0 && nspares
== 0 && nl2cache
== 0)
3796 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
3798 if (vd
->vdev_children
!= 0 &&
3799 (error
= vdev_create(vd
, txg
, B_FALSE
)) != 0)
3800 return (spa_vdev_exit(spa
, vd
, txg
, error
));
3803 * We must validate the spares and l2cache devices after checking the
3804 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
3806 if ((error
= spa_validate_aux(spa
, nvroot
, txg
, VDEV_ALLOC_ADD
)) != 0)
3807 return (spa_vdev_exit(spa
, vd
, txg
, error
));
3810 * Transfer each new top-level vdev from vd to rvd.
3812 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
3815 * Set the vdev id to the first hole, if one exists.
3817 for (id
= 0; id
< rvd
->vdev_children
; id
++) {
3818 if (rvd
->vdev_child
[id
]->vdev_ishole
) {
3819 vdev_free(rvd
->vdev_child
[id
]);
3823 tvd
= vd
->vdev_child
[c
];
3824 vdev_remove_child(vd
, tvd
);
3826 vdev_add_child(rvd
, tvd
);
3827 vdev_config_dirty(tvd
);
3831 spa_set_aux_vdevs(&spa
->spa_spares
, spares
, nspares
,
3832 ZPOOL_CONFIG_SPARES
);
3833 spa_load_spares(spa
);
3834 spa
->spa_spares
.sav_sync
= B_TRUE
;
3837 if (nl2cache
!= 0) {
3838 spa_set_aux_vdevs(&spa
->spa_l2cache
, l2cache
, nl2cache
,
3839 ZPOOL_CONFIG_L2CACHE
);
3840 spa_load_l2cache(spa
);
3841 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3845 * We have to be careful when adding new vdevs to an existing pool.
3846 * If other threads start allocating from these vdevs before we
3847 * sync the config cache, and we lose power, then upon reboot we may
3848 * fail to open the pool because there are DVAs that the config cache
3849 * can't translate. Therefore, we first add the vdevs without
3850 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
3851 * and then let spa_config_update() initialize the new metaslabs.
3853 * spa_load() checks for added-but-not-initialized vdevs, so that
3854 * if we lose power at any point in this sequence, the remaining
3855 * steps will be completed the next time we load the pool.
3857 (void) spa_vdev_exit(spa
, vd
, txg
, 0);
3859 mutex_enter(&spa_namespace_lock
);
3860 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
3861 mutex_exit(&spa_namespace_lock
);
3867 * Attach a device to a mirror. The arguments are the path to any device
3868 * in the mirror, and the nvroot for the new device. If the path specifies
3869 * a device that is not mirrored, we automatically insert the mirror vdev.
3871 * If 'replacing' is specified, the new device is intended to replace the
3872 * existing device; in this case the two devices are made into their own
3873 * mirror using the 'replacing' vdev, which is functionally identical to
3874 * the mirror vdev (it actually reuses all the same ops) but has a few
3875 * extra rules: you can't attach to it after it's been created, and upon
3876 * completion of resilvering, the first disk (the one being replaced)
3877 * is automatically detached.
3880 spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
, int replacing
)
3882 uint64_t txg
, dtl_max_txg
;
3883 vdev_t
*rvd
= spa
->spa_root_vdev
;
3884 vdev_t
*oldvd
, *newvd
, *newrootvd
, *pvd
, *tvd
;
3886 char *oldvdpath
, *newvdpath
;
3890 ASSERT(spa_writeable(spa
));
3892 txg
= spa_vdev_enter(spa
);
3894 oldvd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
3897 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
3899 if (!oldvd
->vdev_ops
->vdev_op_leaf
)
3900 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
3902 pvd
= oldvd
->vdev_parent
;
3904 if ((error
= spa_config_parse(spa
, &newrootvd
, nvroot
, NULL
, 0,
3905 VDEV_ALLOC_ATTACH
)) != 0)
3906 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
3908 if (newrootvd
->vdev_children
!= 1)
3909 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
3911 newvd
= newrootvd
->vdev_child
[0];
3913 if (!newvd
->vdev_ops
->vdev_op_leaf
)
3914 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
3916 if ((error
= vdev_create(newrootvd
, txg
, replacing
)) != 0)
3917 return (spa_vdev_exit(spa
, newrootvd
, txg
, error
));
3920 * Spares can't replace logs
3922 if (oldvd
->vdev_top
->vdev_islog
&& newvd
->vdev_isspare
)
3923 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3927 * For attach, the only allowable parent is a mirror or the root
3930 if (pvd
->vdev_ops
!= &vdev_mirror_ops
&&
3931 pvd
->vdev_ops
!= &vdev_root_ops
)
3932 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3934 pvops
= &vdev_mirror_ops
;
3937 * Active hot spares can only be replaced by inactive hot
3940 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
3941 oldvd
->vdev_isspare
&&
3942 !spa_has_spare(spa
, newvd
->vdev_guid
))
3943 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3946 * If the source is a hot spare, and the parent isn't already a
3947 * spare, then we want to create a new hot spare. Otherwise, we
3948 * want to create a replacing vdev. The user is not allowed to
3949 * attach to a spared vdev child unless the 'isspare' state is
3950 * the same (spare replaces spare, non-spare replaces
3953 if (pvd
->vdev_ops
== &vdev_replacing_ops
&&
3954 spa_version(spa
) < SPA_VERSION_MULTI_REPLACE
) {
3955 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3956 } else if (pvd
->vdev_ops
== &vdev_spare_ops
&&
3957 newvd
->vdev_isspare
!= oldvd
->vdev_isspare
) {
3958 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
3961 if (newvd
->vdev_isspare
)
3962 pvops
= &vdev_spare_ops
;
3964 pvops
= &vdev_replacing_ops
;
3968 * Make sure the new device is big enough.
3970 if (newvd
->vdev_asize
< vdev_get_min_asize(oldvd
))
3971 return (spa_vdev_exit(spa
, newrootvd
, txg
, EOVERFLOW
));
3974 * The new device cannot have a higher alignment requirement
3975 * than the top-level vdev.
3977 if (newvd
->vdev_ashift
> oldvd
->vdev_top
->vdev_ashift
)
3978 return (spa_vdev_exit(spa
, newrootvd
, txg
, EDOM
));
3981 * If this is an in-place replacement, update oldvd's path and devid
3982 * to make it distinguishable from newvd, and unopenable from now on.
3984 if (strcmp(oldvd
->vdev_path
, newvd
->vdev_path
) == 0) {
3985 spa_strfree(oldvd
->vdev_path
);
3986 oldvd
->vdev_path
= kmem_alloc(strlen(newvd
->vdev_path
) + 5,
3988 (void) sprintf(oldvd
->vdev_path
, "%s/%s",
3989 newvd
->vdev_path
, "old");
3990 if (oldvd
->vdev_devid
!= NULL
) {
3991 spa_strfree(oldvd
->vdev_devid
);
3992 oldvd
->vdev_devid
= NULL
;
3996 /* mark the device being resilvered */
3997 newvd
->vdev_resilvering
= B_TRUE
;
4000 * If the parent is not a mirror, or if we're replacing, insert the new
4001 * mirror/replacing/spare vdev above oldvd.
4003 if (pvd
->vdev_ops
!= pvops
)
4004 pvd
= vdev_add_parent(oldvd
, pvops
);
4006 ASSERT(pvd
->vdev_top
->vdev_parent
== rvd
);
4007 ASSERT(pvd
->vdev_ops
== pvops
);
4008 ASSERT(oldvd
->vdev_parent
== pvd
);
4011 * Extract the new device from its root and add it to pvd.
4013 vdev_remove_child(newrootvd
, newvd
);
4014 newvd
->vdev_id
= pvd
->vdev_children
;
4015 newvd
->vdev_crtxg
= oldvd
->vdev_crtxg
;
4016 vdev_add_child(pvd
, newvd
);
4018 tvd
= newvd
->vdev_top
;
4019 ASSERT(pvd
->vdev_top
== tvd
);
4020 ASSERT(tvd
->vdev_parent
== rvd
);
4022 vdev_config_dirty(tvd
);
4025 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
4026 * for any dmu_sync-ed blocks. It will propagate upward when
4027 * spa_vdev_exit() calls vdev_dtl_reassess().
4029 dtl_max_txg
= txg
+ TXG_CONCURRENT_STATES
;
4031 vdev_dtl_dirty(newvd
, DTL_MISSING
, TXG_INITIAL
,
4032 dtl_max_txg
- TXG_INITIAL
);
4034 if (newvd
->vdev_isspare
) {
4035 spa_spare_activate(newvd
);
4036 spa_event_notify(spa
, newvd
, ESC_ZFS_VDEV_SPARE
);
4039 oldvdpath
= spa_strdup(oldvd
->vdev_path
);
4040 newvdpath
= spa_strdup(newvd
->vdev_path
);
4041 newvd_isspare
= newvd
->vdev_isspare
;
4044 * Mark newvd's DTL dirty in this txg.
4046 vdev_dirty(tvd
, VDD_DTL
, newvd
, txg
);
4049 * Restart the resilver
4051 dsl_resilver_restart(spa
->spa_dsl_pool
, dtl_max_txg
);
4056 (void) spa_vdev_exit(spa
, newrootvd
, dtl_max_txg
, 0);
4058 spa_history_log_internal(LOG_POOL_VDEV_ATTACH
, spa
, NULL
,
4059 "%s vdev=%s %s vdev=%s",
4060 replacing
&& newvd_isspare
? "spare in" :
4061 replacing
? "replace" : "attach", newvdpath
,
4062 replacing
? "for" : "to", oldvdpath
);
4064 spa_strfree(oldvdpath
);
4065 spa_strfree(newvdpath
);
4067 if (spa
->spa_bootfs
)
4068 spa_event_notify(spa
, newvd
, ESC_ZFS_BOOTFS_VDEV_ATTACH
);
4074 * Detach a device from a mirror or replacing vdev.
4075 * If 'replace_done' is specified, only detach if the parent
4076 * is a replacing vdev.
4079 spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
, int replace_done
)
4083 vdev_t
*rvd
= spa
->spa_root_vdev
;
4084 vdev_t
*vd
, *pvd
, *cvd
, *tvd
;
4085 boolean_t unspare
= B_FALSE
;
4086 uint64_t unspare_guid
;
4089 ASSERT(spa_writeable(spa
));
4091 txg
= spa_vdev_enter(spa
);
4093 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4096 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4098 if (!vd
->vdev_ops
->vdev_op_leaf
)
4099 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4101 pvd
= vd
->vdev_parent
;
4104 * If the parent/child relationship is not as expected, don't do it.
4105 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4106 * vdev that's replacing B with C. The user's intent in replacing
4107 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4108 * the replace by detaching C, the expected behavior is to end up
4109 * M(A,B). But suppose that right after deciding to detach C,
4110 * the replacement of B completes. We would have M(A,C), and then
4111 * ask to detach C, which would leave us with just A -- not what
4112 * the user wanted. To prevent this, we make sure that the
4113 * parent/child relationship hasn't changed -- in this example,
4114 * that C's parent is still the replacing vdev R.
4116 if (pvd
->vdev_guid
!= pguid
&& pguid
!= 0)
4117 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4120 * Only 'replacing' or 'spare' vdevs can be replaced.
4122 if (replace_done
&& pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4123 pvd
->vdev_ops
!= &vdev_spare_ops
)
4124 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4126 ASSERT(pvd
->vdev_ops
!= &vdev_spare_ops
||
4127 spa_version(spa
) >= SPA_VERSION_SPARES
);
4130 * Only mirror, replacing, and spare vdevs support detach.
4132 if (pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4133 pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4134 pvd
->vdev_ops
!= &vdev_spare_ops
)
4135 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4138 * If this device has the only valid copy of some data,
4139 * we cannot safely detach it.
4141 if (vdev_dtl_required(vd
))
4142 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4144 ASSERT(pvd
->vdev_children
>= 2);
4147 * If we are detaching the second disk from a replacing vdev, then
4148 * check to see if we changed the original vdev's path to have "/old"
4149 * at the end in spa_vdev_attach(). If so, undo that change now.
4151 if (pvd
->vdev_ops
== &vdev_replacing_ops
&& vd
->vdev_id
> 0 &&
4152 vd
->vdev_path
!= NULL
) {
4153 size_t len
= strlen(vd
->vdev_path
);
4155 for (int c
= 0; c
< pvd
->vdev_children
; c
++) {
4156 cvd
= pvd
->vdev_child
[c
];
4158 if (cvd
== vd
|| cvd
->vdev_path
== NULL
)
4161 if (strncmp(cvd
->vdev_path
, vd
->vdev_path
, len
) == 0 &&
4162 strcmp(cvd
->vdev_path
+ len
, "/old") == 0) {
4163 spa_strfree(cvd
->vdev_path
);
4164 cvd
->vdev_path
= spa_strdup(vd
->vdev_path
);
4171 * If we are detaching the original disk from a spare, then it implies
4172 * that the spare should become a real disk, and be removed from the
4173 * active spare list for the pool.
4175 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4177 pvd
->vdev_child
[pvd
->vdev_children
- 1]->vdev_isspare
)
4181 * Erase the disk labels so the disk can be used for other things.
4182 * This must be done after all other error cases are handled,
4183 * but before we disembowel vd (so we can still do I/O to it).
4184 * But if we can't do it, don't treat the error as fatal --
4185 * it may be that the unwritability of the disk is the reason
4186 * it's being detached!
4188 error
= vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4191 * Remove vd from its parent and compact the parent's children.
4193 vdev_remove_child(pvd
, vd
);
4194 vdev_compact_children(pvd
);
4197 * Remember one of the remaining children so we can get tvd below.
4199 cvd
= pvd
->vdev_child
[pvd
->vdev_children
- 1];
4202 * If we need to remove the remaining child from the list of hot spares,
4203 * do it now, marking the vdev as no longer a spare in the process.
4204 * We must do this before vdev_remove_parent(), because that can
4205 * change the GUID if it creates a new toplevel GUID. For a similar
4206 * reason, we must remove the spare now, in the same txg as the detach;
4207 * otherwise someone could attach a new sibling, change the GUID, and
4208 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
4211 ASSERT(cvd
->vdev_isspare
);
4212 spa_spare_remove(cvd
);
4213 unspare_guid
= cvd
->vdev_guid
;
4214 (void) spa_vdev_remove(spa
, unspare_guid
, B_TRUE
);
4215 cvd
->vdev_unspare
= B_TRUE
;
4219 * If the parent mirror/replacing vdev only has one child,
4220 * the parent is no longer needed. Remove it from the tree.
4222 if (pvd
->vdev_children
== 1) {
4223 if (pvd
->vdev_ops
== &vdev_spare_ops
)
4224 cvd
->vdev_unspare
= B_FALSE
;
4225 vdev_remove_parent(cvd
);
4226 cvd
->vdev_resilvering
= B_FALSE
;
4231 * We don't set tvd until now because the parent we just removed
4232 * may have been the previous top-level vdev.
4234 tvd
= cvd
->vdev_top
;
4235 ASSERT(tvd
->vdev_parent
== rvd
);
4238 * Reevaluate the parent vdev state.
4240 vdev_propagate_state(cvd
);
4243 * If the 'autoexpand' property is set on the pool then automatically
4244 * try to expand the size of the pool. For example if the device we
4245 * just detached was smaller than the others, it may be possible to
4246 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
4247 * first so that we can obtain the updated sizes of the leaf vdevs.
4249 if (spa
->spa_autoexpand
) {
4251 vdev_expand(tvd
, txg
);
4254 vdev_config_dirty(tvd
);
4257 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
4258 * vd->vdev_detached is set and free vd's DTL object in syncing context.
4259 * But first make sure we're not on any *other* txg's DTL list, to
4260 * prevent vd from being accessed after it's freed.
4262 vdpath
= spa_strdup(vd
->vdev_path
);
4263 for (int t
= 0; t
< TXG_SIZE
; t
++)
4264 (void) txg_list_remove_this(&tvd
->vdev_dtl_list
, vd
, t
);
4265 vd
->vdev_detached
= B_TRUE
;
4266 vdev_dirty(tvd
, VDD_DTL
, vd
, txg
);
4268 spa_event_notify(spa
, vd
, ESC_ZFS_VDEV_REMOVE
);
4270 /* hang on to the spa before we release the lock */
4271 spa_open_ref(spa
, FTAG
);
4273 error
= spa_vdev_exit(spa
, vd
, txg
, 0);
4275 spa_history_log_internal(LOG_POOL_VDEV_DETACH
, spa
, NULL
,
4277 spa_strfree(vdpath
);
4280 * If this was the removal of the original device in a hot spare vdev,
4281 * then we want to go through and remove the device from the hot spare
4282 * list of every other pool.
4285 spa_t
*altspa
= NULL
;
4287 mutex_enter(&spa_namespace_lock
);
4288 while ((altspa
= spa_next(altspa
)) != NULL
) {
4289 if (altspa
->spa_state
!= POOL_STATE_ACTIVE
||
4293 spa_open_ref(altspa
, FTAG
);
4294 mutex_exit(&spa_namespace_lock
);
4295 (void) spa_vdev_remove(altspa
, unspare_guid
, B_TRUE
);
4296 mutex_enter(&spa_namespace_lock
);
4297 spa_close(altspa
, FTAG
);
4299 mutex_exit(&spa_namespace_lock
);
4301 /* search the rest of the vdevs for spares to remove */
4302 spa_vdev_resilver_done(spa
);
4305 /* all done with the spa; OK to release */
4306 mutex_enter(&spa_namespace_lock
);
4307 spa_close(spa
, FTAG
);
4308 mutex_exit(&spa_namespace_lock
);
4314 * Split a set of devices from their mirrors, and create a new pool from them.
4317 spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
4318 nvlist_t
*props
, boolean_t exp
)
4321 uint64_t txg
, *glist
;
4323 uint_t c
, children
, lastlog
;
4324 nvlist_t
**child
, *nvl
, *tmp
;
4326 char *altroot
= NULL
;
4327 vdev_t
*rvd
, **vml
= NULL
; /* vdev modify list */
4328 boolean_t activate_slog
;
4330 ASSERT(spa_writeable(spa
));
4332 txg
= spa_vdev_enter(spa
);
4334 /* clear the log and flush everything up to now */
4335 activate_slog
= spa_passivate_log(spa
);
4336 (void) spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4337 error
= spa_offline_log(spa
);
4338 txg
= spa_vdev_config_enter(spa
);
4341 spa_activate_log(spa
);
4344 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4346 /* check new spa name before going any further */
4347 if (spa_lookup(newname
) != NULL
)
4348 return (spa_vdev_exit(spa
, NULL
, txg
, EEXIST
));
4351 * scan through all the children to ensure they're all mirrors
4353 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
) != 0 ||
4354 nvlist_lookup_nvlist_array(nvl
, ZPOOL_CONFIG_CHILDREN
, &child
,
4356 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4358 /* first, check to ensure we've got the right child count */
4359 rvd
= spa
->spa_root_vdev
;
4361 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
4362 vdev_t
*vd
= rvd
->vdev_child
[c
];
4364 /* don't count the holes & logs as children */
4365 if (vd
->vdev_islog
|| vd
->vdev_ishole
) {
4373 if (children
!= (lastlog
!= 0 ? lastlog
: rvd
->vdev_children
))
4374 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4376 /* next, ensure no spare or cache devices are part of the split */
4377 if (nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_SPARES
, &tmp
) == 0 ||
4378 nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_L2CACHE
, &tmp
) == 0)
4379 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4381 vml
= kmem_zalloc(children
* sizeof (vdev_t
*), KM_SLEEP
);
4382 glist
= kmem_zalloc(children
* sizeof (uint64_t), KM_SLEEP
);
4384 /* then, loop over each vdev and validate it */
4385 for (c
= 0; c
< children
; c
++) {
4386 uint64_t is_hole
= 0;
4388 (void) nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_IS_HOLE
,
4392 if (spa
->spa_root_vdev
->vdev_child
[c
]->vdev_ishole
||
4393 spa
->spa_root_vdev
->vdev_child
[c
]->vdev_islog
) {
4401 /* which disk is going to be split? */
4402 if (nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_GUID
,
4408 /* look it up in the spa */
4409 vml
[c
] = spa_lookup_by_guid(spa
, glist
[c
], B_FALSE
);
4410 if (vml
[c
] == NULL
) {
4415 /* make sure there's nothing stopping the split */
4416 if (vml
[c
]->vdev_parent
->vdev_ops
!= &vdev_mirror_ops
||
4417 vml
[c
]->vdev_islog
||
4418 vml
[c
]->vdev_ishole
||
4419 vml
[c
]->vdev_isspare
||
4420 vml
[c
]->vdev_isl2cache
||
4421 !vdev_writeable(vml
[c
]) ||
4422 vml
[c
]->vdev_children
!= 0 ||
4423 vml
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
||
4424 c
!= spa
->spa_root_vdev
->vdev_child
[c
]->vdev_id
) {
4429 if (vdev_dtl_required(vml
[c
])) {
4434 /* we need certain info from the top level */
4435 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_ARRAY
,
4436 vml
[c
]->vdev_top
->vdev_ms_array
) == 0);
4437 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_SHIFT
,
4438 vml
[c
]->vdev_top
->vdev_ms_shift
) == 0);
4439 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASIZE
,
4440 vml
[c
]->vdev_top
->vdev_asize
) == 0);
4441 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASHIFT
,
4442 vml
[c
]->vdev_top
->vdev_ashift
) == 0);
4446 kmem_free(vml
, children
* sizeof (vdev_t
*));
4447 kmem_free(glist
, children
* sizeof (uint64_t));
4448 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4451 /* stop writers from using the disks */
4452 for (c
= 0; c
< children
; c
++) {
4454 vml
[c
]->vdev_offline
= B_TRUE
;
4456 vdev_reopen(spa
->spa_root_vdev
);
4459 * Temporarily record the splitting vdevs in the spa config. This
4460 * will disappear once the config is regenerated.
4462 VERIFY(nvlist_alloc(&nvl
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4463 VERIFY(nvlist_add_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
4464 glist
, children
) == 0);
4465 kmem_free(glist
, children
* sizeof (uint64_t));
4467 mutex_enter(&spa
->spa_props_lock
);
4468 VERIFY(nvlist_add_nvlist(spa
->spa_config
, ZPOOL_CONFIG_SPLIT
,
4470 mutex_exit(&spa
->spa_props_lock
);
4471 spa
->spa_config_splitting
= nvl
;
4472 vdev_config_dirty(spa
->spa_root_vdev
);
4474 /* configure and create the new pool */
4475 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
, newname
) == 0);
4476 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
4477 exp
? POOL_STATE_EXPORTED
: POOL_STATE_ACTIVE
) == 0);
4478 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
4479 spa_version(spa
)) == 0);
4480 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
4481 spa
->spa_config_txg
) == 0);
4482 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
4483 spa_generate_guid(NULL
)) == 0);
4484 (void) nvlist_lookup_string(props
,
4485 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
4487 /* add the new pool to the namespace */
4488 newspa
= spa_add(newname
, config
, altroot
);
4489 newspa
->spa_config_txg
= spa
->spa_config_txg
;
4490 spa_set_log_state(newspa
, SPA_LOG_CLEAR
);
4492 /* release the spa config lock, retaining the namespace lock */
4493 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4495 if (zio_injection_enabled
)
4496 zio_handle_panic_injection(spa
, FTAG
, 1);
4498 spa_activate(newspa
, spa_mode_global
);
4499 spa_async_suspend(newspa
);
4501 /* create the new pool from the disks of the original pool */
4502 error
= spa_load(newspa
, SPA_LOAD_IMPORT
, SPA_IMPORT_ASSEMBLE
, B_TRUE
);
4506 /* if that worked, generate a real config for the new pool */
4507 if (newspa
->spa_root_vdev
!= NULL
) {
4508 VERIFY(nvlist_alloc(&newspa
->spa_config_splitting
,
4509 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4510 VERIFY(nvlist_add_uint64(newspa
->spa_config_splitting
,
4511 ZPOOL_CONFIG_SPLIT_GUID
, spa_guid(spa
)) == 0);
4512 spa_config_set(newspa
, spa_config_generate(newspa
, NULL
, -1ULL,
4517 if (props
!= NULL
) {
4518 spa_configfile_set(newspa
, props
, B_FALSE
);
4519 error
= spa_prop_set(newspa
, props
);
4524 /* flush everything */
4525 txg
= spa_vdev_config_enter(newspa
);
4526 vdev_config_dirty(newspa
->spa_root_vdev
);
4527 (void) spa_vdev_config_exit(newspa
, NULL
, txg
, 0, FTAG
);
4529 if (zio_injection_enabled
)
4530 zio_handle_panic_injection(spa
, FTAG
, 2);
4532 spa_async_resume(newspa
);
4534 /* finally, update the original pool's config */
4535 txg
= spa_vdev_config_enter(spa
);
4536 tx
= dmu_tx_create_dd(spa_get_dsl(spa
)->dp_mos_dir
);
4537 error
= dmu_tx_assign(tx
, TXG_WAIT
);
4540 for (c
= 0; c
< children
; c
++) {
4541 if (vml
[c
] != NULL
) {
4544 spa_history_log_internal(LOG_POOL_VDEV_DETACH
,
4550 vdev_config_dirty(spa
->spa_root_vdev
);
4551 spa
->spa_config_splitting
= NULL
;
4555 (void) spa_vdev_exit(spa
, NULL
, txg
, 0);
4557 if (zio_injection_enabled
)
4558 zio_handle_panic_injection(spa
, FTAG
, 3);
4560 /* split is complete; log a history record */
4561 spa_history_log_internal(LOG_POOL_SPLIT
, newspa
, NULL
,
4562 "split new pool %s from pool %s", newname
, spa_name(spa
));
4564 kmem_free(vml
, children
* sizeof (vdev_t
*));
4566 /* if we're not going to mount the filesystems in userland, export */
4568 error
= spa_export_common(newname
, POOL_STATE_EXPORTED
, NULL
,
4575 spa_deactivate(newspa
);
4578 txg
= spa_vdev_config_enter(spa
);
4580 /* re-online all offlined disks */
4581 for (c
= 0; c
< children
; c
++) {
4583 vml
[c
]->vdev_offline
= B_FALSE
;
4585 vdev_reopen(spa
->spa_root_vdev
);
4587 nvlist_free(spa
->spa_config_splitting
);
4588 spa
->spa_config_splitting
= NULL
;
4589 (void) spa_vdev_exit(spa
, NULL
, txg
, error
);
4591 kmem_free(vml
, children
* sizeof (vdev_t
*));
4596 spa_nvlist_lookup_by_guid(nvlist_t
**nvpp
, int count
, uint64_t target_guid
)
4598 for (int i
= 0; i
< count
; i
++) {
4601 VERIFY(nvlist_lookup_uint64(nvpp
[i
], ZPOOL_CONFIG_GUID
,
4604 if (guid
== target_guid
)
4612 spa_vdev_remove_aux(nvlist_t
*config
, char *name
, nvlist_t
**dev
, int count
,
4613 nvlist_t
*dev_to_remove
)
4615 nvlist_t
**newdev
= NULL
;
4618 newdev
= kmem_alloc((count
- 1) * sizeof (void *), KM_SLEEP
);
4620 for (int i
= 0, j
= 0; i
< count
; i
++) {
4621 if (dev
[i
] == dev_to_remove
)
4623 VERIFY(nvlist_dup(dev
[i
], &newdev
[j
++], KM_SLEEP
) == 0);
4626 VERIFY(nvlist_remove(config
, name
, DATA_TYPE_NVLIST_ARRAY
) == 0);
4627 VERIFY(nvlist_add_nvlist_array(config
, name
, newdev
, count
- 1) == 0);
4629 for (int i
= 0; i
< count
- 1; i
++)
4630 nvlist_free(newdev
[i
]);
4633 kmem_free(newdev
, (count
- 1) * sizeof (void *));
4637 * Evacuate the device.
4640 spa_vdev_remove_evacuate(spa_t
*spa
, vdev_t
*vd
)
4645 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
4646 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
4647 ASSERT(vd
== vd
->vdev_top
);
4650 * Evacuate the device. We don't hold the config lock as writer
4651 * since we need to do I/O but we do keep the
4652 * spa_namespace_lock held. Once this completes the device
4653 * should no longer have any blocks allocated on it.
4655 if (vd
->vdev_islog
) {
4656 if (vd
->vdev_stat
.vs_alloc
!= 0)
4657 error
= spa_offline_log(spa
);
4666 * The evacuation succeeded. Remove any remaining MOS metadata
4667 * associated with this vdev, and wait for these changes to sync.
4669 ASSERT3U(vd
->vdev_stat
.vs_alloc
, ==, 0);
4670 txg
= spa_vdev_config_enter(spa
);
4671 vd
->vdev_removing
= B_TRUE
;
4672 vdev_dirty(vd
, 0, NULL
, txg
);
4673 vdev_config_dirty(vd
);
4674 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4680 * Complete the removal by cleaning up the namespace.
4683 spa_vdev_remove_from_namespace(spa_t
*spa
, vdev_t
*vd
)
4685 vdev_t
*rvd
= spa
->spa_root_vdev
;
4686 uint64_t id
= vd
->vdev_id
;
4687 boolean_t last_vdev
= (id
== (rvd
->vdev_children
- 1));
4689 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
4690 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
4691 ASSERT(vd
== vd
->vdev_top
);
4694 * Only remove any devices which are empty.
4696 if (vd
->vdev_stat
.vs_alloc
!= 0)
4699 (void) vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4701 if (list_link_active(&vd
->vdev_state_dirty_node
))
4702 vdev_state_clean(vd
);
4703 if (list_link_active(&vd
->vdev_config_dirty_node
))
4704 vdev_config_clean(vd
);
4709 vdev_compact_children(rvd
);
4711 vd
= vdev_alloc_common(spa
, id
, 0, &vdev_hole_ops
);
4712 vdev_add_child(rvd
, vd
);
4714 vdev_config_dirty(rvd
);
4717 * Reassess the health of our root vdev.
4723 * Remove a device from the pool -
4725 * Removing a device from the vdev namespace requires several steps
4726 * and can take a significant amount of time. As a result we use
4727 * the spa_vdev_config_[enter/exit] functions which allow us to
4728 * grab and release the spa_config_lock while still holding the namespace
4729 * lock. During each step the configuration is synced out.
4733 * Remove a device from the pool. Currently, this supports removing only hot
4734 * spares, slogs, and level 2 ARC devices.
4737 spa_vdev_remove(spa_t
*spa
, uint64_t guid
, boolean_t unspare
)
4740 metaslab_group_t
*mg
;
4741 nvlist_t
**spares
, **l2cache
, *nv
;
4743 uint_t nspares
, nl2cache
;
4745 boolean_t locked
= MUTEX_HELD(&spa_namespace_lock
);
4747 ASSERT(spa_writeable(spa
));
4750 txg
= spa_vdev_enter(spa
);
4752 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4754 if (spa
->spa_spares
.sav_vdevs
!= NULL
&&
4755 nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
4756 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0 &&
4757 (nv
= spa_nvlist_lookup_by_guid(spares
, nspares
, guid
)) != NULL
) {
4759 * Only remove the hot spare if it's not currently in use
4762 if (vd
== NULL
|| unspare
) {
4763 spa_vdev_remove_aux(spa
->spa_spares
.sav_config
,
4764 ZPOOL_CONFIG_SPARES
, spares
, nspares
, nv
);
4765 spa_load_spares(spa
);
4766 spa
->spa_spares
.sav_sync
= B_TRUE
;
4770 } else if (spa
->spa_l2cache
.sav_vdevs
!= NULL
&&
4771 nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
4772 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0 &&
4773 (nv
= spa_nvlist_lookup_by_guid(l2cache
, nl2cache
, guid
)) != NULL
) {
4775 * Cache devices can always be removed.
4777 spa_vdev_remove_aux(spa
->spa_l2cache
.sav_config
,
4778 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
, nv
);
4779 spa_load_l2cache(spa
);
4780 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4781 } else if (vd
!= NULL
&& vd
->vdev_islog
) {
4783 ASSERT(vd
== vd
->vdev_top
);
4786 * XXX - Once we have bp-rewrite this should
4787 * become the common case.
4793 * Stop allocating from this vdev.
4795 metaslab_group_passivate(mg
);
4798 * Wait for the youngest allocations and frees to sync,
4799 * and then wait for the deferral of those frees to finish.
4801 spa_vdev_config_exit(spa
, NULL
,
4802 txg
+ TXG_CONCURRENT_STATES
+ TXG_DEFER_SIZE
, 0, FTAG
);
4805 * Attempt to evacuate the vdev.
4807 error
= spa_vdev_remove_evacuate(spa
, vd
);
4809 txg
= spa_vdev_config_enter(spa
);
4812 * If we couldn't evacuate the vdev, unwind.
4815 metaslab_group_activate(mg
);
4816 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4820 * Clean up the vdev namespace.
4822 spa_vdev_remove_from_namespace(spa
, vd
);
4824 } else if (vd
!= NULL
) {
4826 * Normal vdevs cannot be removed (yet).
4831 * There is no vdev of any kind with the specified guid.
4837 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4843 * Find any device that's done replacing, or a vdev marked 'unspare' that's
4844 * current spared, so we can detach it.
4847 spa_vdev_resilver_done_hunt(vdev_t
*vd
)
4849 vdev_t
*newvd
, *oldvd
;
4851 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
4852 oldvd
= spa_vdev_resilver_done_hunt(vd
->vdev_child
[c
]);
4858 * Check for a completed replacement. We always consider the first
4859 * vdev in the list to be the oldest vdev, and the last one to be
4860 * the newest (see spa_vdev_attach() for how that works). In
4861 * the case where the newest vdev is faulted, we will not automatically
4862 * remove it after a resilver completes. This is OK as it will require
4863 * user intervention to determine which disk the admin wishes to keep.
4865 if (vd
->vdev_ops
== &vdev_replacing_ops
) {
4866 ASSERT(vd
->vdev_children
> 1);
4868 newvd
= vd
->vdev_child
[vd
->vdev_children
- 1];
4869 oldvd
= vd
->vdev_child
[0];
4871 if (vdev_dtl_empty(newvd
, DTL_MISSING
) &&
4872 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
4873 !vdev_dtl_required(oldvd
))
4878 * Check for a completed resilver with the 'unspare' flag set.
4880 if (vd
->vdev_ops
== &vdev_spare_ops
) {
4881 vdev_t
*first
= vd
->vdev_child
[0];
4882 vdev_t
*last
= vd
->vdev_child
[vd
->vdev_children
- 1];
4884 if (last
->vdev_unspare
) {
4887 } else if (first
->vdev_unspare
) {
4894 if (oldvd
!= NULL
&&
4895 vdev_dtl_empty(newvd
, DTL_MISSING
) &&
4896 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
4897 !vdev_dtl_required(oldvd
))
4901 * If there are more than two spares attached to a disk,
4902 * and those spares are not required, then we want to
4903 * attempt to free them up now so that they can be used
4904 * by other pools. Once we're back down to a single
4905 * disk+spare, we stop removing them.
4907 if (vd
->vdev_children
> 2) {
4908 newvd
= vd
->vdev_child
[1];
4910 if (newvd
->vdev_isspare
&& last
->vdev_isspare
&&
4911 vdev_dtl_empty(last
, DTL_MISSING
) &&
4912 vdev_dtl_empty(last
, DTL_OUTAGE
) &&
4913 !vdev_dtl_required(newvd
))
4922 spa_vdev_resilver_done(spa_t
*spa
)
4924 vdev_t
*vd
, *pvd
, *ppvd
;
4925 uint64_t guid
, sguid
, pguid
, ppguid
;
4927 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4929 while ((vd
= spa_vdev_resilver_done_hunt(spa
->spa_root_vdev
)) != NULL
) {
4930 pvd
= vd
->vdev_parent
;
4931 ppvd
= pvd
->vdev_parent
;
4932 guid
= vd
->vdev_guid
;
4933 pguid
= pvd
->vdev_guid
;
4934 ppguid
= ppvd
->vdev_guid
;
4937 * If we have just finished replacing a hot spared device, then
4938 * we need to detach the parent's first child (the original hot
4941 if (ppvd
->vdev_ops
== &vdev_spare_ops
&& pvd
->vdev_id
== 0 &&
4942 ppvd
->vdev_children
== 2) {
4943 ASSERT(pvd
->vdev_ops
== &vdev_replacing_ops
);
4944 sguid
= ppvd
->vdev_child
[1]->vdev_guid
;
4946 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4947 if (spa_vdev_detach(spa
, guid
, pguid
, B_TRUE
) != 0)
4949 if (sguid
&& spa_vdev_detach(spa
, sguid
, ppguid
, B_TRUE
) != 0)
4951 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4954 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4958 * Update the stored path or FRU for this vdev.
4961 spa_vdev_set_common(spa_t
*spa
, uint64_t guid
, const char *value
,
4965 boolean_t sync
= B_FALSE
;
4967 ASSERT(spa_writeable(spa
));
4969 spa_vdev_state_enter(spa
, SCL_ALL
);
4971 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
4972 return (spa_vdev_state_exit(spa
, NULL
, ENOENT
));
4974 if (!vd
->vdev_ops
->vdev_op_leaf
)
4975 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
4978 if (strcmp(value
, vd
->vdev_path
) != 0) {
4979 spa_strfree(vd
->vdev_path
);
4980 vd
->vdev_path
= spa_strdup(value
);
4984 if (vd
->vdev_fru
== NULL
) {
4985 vd
->vdev_fru
= spa_strdup(value
);
4987 } else if (strcmp(value
, vd
->vdev_fru
) != 0) {
4988 spa_strfree(vd
->vdev_fru
);
4989 vd
->vdev_fru
= spa_strdup(value
);
4994 return (spa_vdev_state_exit(spa
, sync
? vd
: NULL
, 0));
4998 spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
)
5000 return (spa_vdev_set_common(spa
, guid
, newpath
, B_TRUE
));
5004 spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
)
5006 return (spa_vdev_set_common(spa
, guid
, newfru
, B_FALSE
));
5010 * ==========================================================================
5012 * ==========================================================================
5016 spa_scan_stop(spa_t
*spa
)
5018 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5019 if (dsl_scan_resilvering(spa
->spa_dsl_pool
))
5021 return (dsl_scan_cancel(spa
->spa_dsl_pool
));
5025 spa_scan(spa_t
*spa
, pool_scan_func_t func
)
5027 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5029 if (func
>= POOL_SCAN_FUNCS
|| func
== POOL_SCAN_NONE
)
5033 * If a resilver was requested, but there is no DTL on a
5034 * writeable leaf device, we have nothing to do.
5036 if (func
== POOL_SCAN_RESILVER
&&
5037 !vdev_resilver_needed(spa
->spa_root_vdev
, NULL
, NULL
)) {
5038 spa_async_request(spa
, SPA_ASYNC_RESILVER_DONE
);
5042 return (dsl_scan(spa
->spa_dsl_pool
, func
));
5046 * ==========================================================================
5047 * SPA async task processing
5048 * ==========================================================================
5052 spa_async_remove(spa_t
*spa
, vdev_t
*vd
)
5054 if (vd
->vdev_remove_wanted
) {
5055 vd
->vdev_remove_wanted
= B_FALSE
;
5056 vd
->vdev_delayed_close
= B_FALSE
;
5057 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_REMOVED
, VDEV_AUX_NONE
);
5060 * We want to clear the stats, but we don't want to do a full
5061 * vdev_clear() as that will cause us to throw away
5062 * degraded/faulted state as well as attempt to reopen the
5063 * device, all of which is a waste.
5065 vd
->vdev_stat
.vs_read_errors
= 0;
5066 vd
->vdev_stat
.vs_write_errors
= 0;
5067 vd
->vdev_stat
.vs_checksum_errors
= 0;
5069 vdev_state_dirty(vd
->vdev_top
);
5072 for (int c
= 0; c
< vd
->vdev_children
; c
++)
5073 spa_async_remove(spa
, vd
->vdev_child
[c
]);
5077 spa_async_probe(spa_t
*spa
, vdev_t
*vd
)
5079 if (vd
->vdev_probe_wanted
) {
5080 vd
->vdev_probe_wanted
= B_FALSE
;
5081 vdev_reopen(vd
); /* vdev_open() does the actual probe */
5084 for (int c
= 0; c
< vd
->vdev_children
; c
++)
5085 spa_async_probe(spa
, vd
->vdev_child
[c
]);
5089 spa_async_autoexpand(spa_t
*spa
, vdev_t
*vd
)
5095 if (!spa
->spa_autoexpand
)
5098 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
5099 vdev_t
*cvd
= vd
->vdev_child
[c
];
5100 spa_async_autoexpand(spa
, cvd
);
5103 if (!vd
->vdev_ops
->vdev_op_leaf
|| vd
->vdev_physpath
== NULL
)
5106 physpath
= kmem_zalloc(MAXPATHLEN
, KM_SLEEP
);
5107 (void) snprintf(physpath
, MAXPATHLEN
, "/devices%s", vd
->vdev_physpath
);
5109 VERIFY(nvlist_alloc(&attr
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5110 VERIFY(nvlist_add_string(attr
, DEV_PHYS_PATH
, physpath
) == 0);
5112 (void) ddi_log_sysevent(zfs_dip
, SUNW_VENDOR
, EC_DEV_STATUS
,
5113 ESC_DEV_DLE
, attr
, &eid
, DDI_SLEEP
);
5116 kmem_free(physpath
, MAXPATHLEN
);
5120 spa_async_thread(spa_t
*spa
)
5124 ASSERT(spa
->spa_sync_on
);
5126 mutex_enter(&spa
->spa_async_lock
);
5127 tasks
= spa
->spa_async_tasks
;
5128 spa
->spa_async_tasks
= 0;
5129 mutex_exit(&spa
->spa_async_lock
);
5132 * See if the config needs to be updated.
5134 if (tasks
& SPA_ASYNC_CONFIG_UPDATE
) {
5135 uint64_t old_space
, new_space
;
5137 mutex_enter(&spa_namespace_lock
);
5138 old_space
= metaslab_class_get_space(spa_normal_class(spa
));
5139 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
5140 new_space
= metaslab_class_get_space(spa_normal_class(spa
));
5141 mutex_exit(&spa_namespace_lock
);
5144 * If the pool grew as a result of the config update,
5145 * then log an internal history event.
5147 if (new_space
!= old_space
) {
5148 spa_history_log_internal(LOG_POOL_VDEV_ONLINE
,
5150 "pool '%s' size: %llu(+%llu)",
5151 spa_name(spa
), new_space
, new_space
- old_space
);
5156 * See if any devices need to be marked REMOVED.
5158 if (tasks
& SPA_ASYNC_REMOVE
) {
5159 spa_vdev_state_enter(spa
, SCL_NONE
);
5160 spa_async_remove(spa
, spa
->spa_root_vdev
);
5161 for (int i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
5162 spa_async_remove(spa
, spa
->spa_l2cache
.sav_vdevs
[i
]);
5163 for (int i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
5164 spa_async_remove(spa
, spa
->spa_spares
.sav_vdevs
[i
]);
5165 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5168 if ((tasks
& SPA_ASYNC_AUTOEXPAND
) && !spa_suspended(spa
)) {
5169 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5170 spa_async_autoexpand(spa
, spa
->spa_root_vdev
);
5171 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5175 * See if any devices need to be probed.
5177 if (tasks
& SPA_ASYNC_PROBE
) {
5178 spa_vdev_state_enter(spa
, SCL_NONE
);
5179 spa_async_probe(spa
, spa
->spa_root_vdev
);
5180 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5184 * If any devices are done replacing, detach them.
5186 if (tasks
& SPA_ASYNC_RESILVER_DONE
)
5187 spa_vdev_resilver_done(spa
);
5190 * Kick off a resilver.
5192 if (tasks
& SPA_ASYNC_RESILVER
)
5193 dsl_resilver_restart(spa
->spa_dsl_pool
, 0);
5196 * Let the world know that we're done.
5198 mutex_enter(&spa
->spa_async_lock
);
5199 spa
->spa_async_thread
= NULL
;
5200 cv_broadcast(&spa
->spa_async_cv
);
5201 mutex_exit(&spa
->spa_async_lock
);
5206 spa_async_suspend(spa_t
*spa
)
5208 mutex_enter(&spa
->spa_async_lock
);
5209 spa
->spa_async_suspended
++;
5210 while (spa
->spa_async_thread
!= NULL
)
5211 cv_wait(&spa
->spa_async_cv
, &spa
->spa_async_lock
);
5212 mutex_exit(&spa
->spa_async_lock
);
5216 spa_async_resume(spa_t
*spa
)
5218 mutex_enter(&spa
->spa_async_lock
);
5219 ASSERT(spa
->spa_async_suspended
!= 0);
5220 spa
->spa_async_suspended
--;
5221 mutex_exit(&spa
->spa_async_lock
);
5225 spa_async_dispatch(spa_t
*spa
)
5227 mutex_enter(&spa
->spa_async_lock
);
5228 if (spa
->spa_async_tasks
&& !spa
->spa_async_suspended
&&
5229 spa
->spa_async_thread
== NULL
&&
5230 rootdir
!= NULL
&& !vn_is_readonly(rootdir
))
5231 spa
->spa_async_thread
= thread_create(NULL
, 0,
5232 spa_async_thread
, spa
, 0, &p0
, TS_RUN
, maxclsyspri
);
5233 mutex_exit(&spa
->spa_async_lock
);
5237 spa_async_request(spa_t
*spa
, int task
)
5239 zfs_dbgmsg("spa=%s async request task=%u", spa
->spa_name
, task
);
5240 mutex_enter(&spa
->spa_async_lock
);
5241 spa
->spa_async_tasks
|= task
;
5242 mutex_exit(&spa
->spa_async_lock
);
5246 * ==========================================================================
5247 * SPA syncing routines
5248 * ==========================================================================
5252 bpobj_enqueue_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5255 bpobj_enqueue(bpo
, bp
, tx
);
5260 spa_free_sync_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5264 zio_nowait(zio_free_sync(zio
, zio
->io_spa
, dmu_tx_get_txg(tx
), bp
,
5270 spa_sync_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
*nv
, dmu_tx_t
*tx
)
5272 char *packed
= NULL
;
5277 VERIFY(nvlist_size(nv
, &nvsize
, NV_ENCODE_XDR
) == 0);
5280 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
5281 * information. This avoids the dbuf_will_dirty() path and
5282 * saves us a pre-read to get data we don't actually care about.
5284 bufsize
= P2ROUNDUP(nvsize
, SPA_CONFIG_BLOCKSIZE
);
5285 packed
= kmem_alloc(bufsize
, KM_SLEEP
);
5287 VERIFY(nvlist_pack(nv
, &packed
, &nvsize
, NV_ENCODE_XDR
,
5289 bzero(packed
+ nvsize
, bufsize
- nvsize
);
5291 dmu_write(spa
->spa_meta_objset
, obj
, 0, bufsize
, packed
, tx
);
5293 kmem_free(packed
, bufsize
);
5295 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
5296 dmu_buf_will_dirty(db
, tx
);
5297 *(uint64_t *)db
->db_data
= nvsize
;
5298 dmu_buf_rele(db
, FTAG
);
5302 spa_sync_aux_dev(spa_t
*spa
, spa_aux_vdev_t
*sav
, dmu_tx_t
*tx
,
5303 const char *config
, const char *entry
)
5313 * Update the MOS nvlist describing the list of available devices.
5314 * spa_validate_aux() will have already made sure this nvlist is
5315 * valid and the vdevs are labeled appropriately.
5317 if (sav
->sav_object
== 0) {
5318 sav
->sav_object
= dmu_object_alloc(spa
->spa_meta_objset
,
5319 DMU_OT_PACKED_NVLIST
, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE
,
5320 sizeof (uint64_t), tx
);
5321 VERIFY(zap_update(spa
->spa_meta_objset
,
5322 DMU_POOL_DIRECTORY_OBJECT
, entry
, sizeof (uint64_t), 1,
5323 &sav
->sav_object
, tx
) == 0);
5326 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5327 if (sav
->sav_count
== 0) {
5328 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, NULL
, 0) == 0);
5330 list
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
5331 for (i
= 0; i
< sav
->sav_count
; i
++)
5332 list
[i
] = vdev_config_generate(spa
, sav
->sav_vdevs
[i
],
5333 B_FALSE
, VDEV_CONFIG_L2CACHE
);
5334 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, list
,
5335 sav
->sav_count
) == 0);
5336 for (i
= 0; i
< sav
->sav_count
; i
++)
5337 nvlist_free(list
[i
]);
5338 kmem_free(list
, sav
->sav_count
* sizeof (void *));
5341 spa_sync_nvlist(spa
, sav
->sav_object
, nvroot
, tx
);
5342 nvlist_free(nvroot
);
5344 sav
->sav_sync
= B_FALSE
;
5348 spa_sync_config_object(spa_t
*spa
, dmu_tx_t
*tx
)
5352 if (list_is_empty(&spa
->spa_config_dirty_list
))
5355 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5357 config
= spa_config_generate(spa
, spa
->spa_root_vdev
,
5358 dmu_tx_get_txg(tx
), B_FALSE
);
5360 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5362 if (spa
->spa_config_syncing
)
5363 nvlist_free(spa
->spa_config_syncing
);
5364 spa
->spa_config_syncing
= config
;
5366 spa_sync_nvlist(spa
, spa
->spa_config_object
, config
, tx
);
5370 * Set zpool properties.
5373 spa_sync_props(void *arg1
, void *arg2
, dmu_tx_t
*tx
)
5376 objset_t
*mos
= spa
->spa_meta_objset
;
5377 nvlist_t
*nvp
= arg2
;
5382 const char *propname
;
5383 zprop_type_t proptype
;
5385 mutex_enter(&spa
->spa_props_lock
);
5388 while ((elem
= nvlist_next_nvpair(nvp
, elem
))) {
5389 switch (prop
= zpool_name_to_prop(nvpair_name(elem
))) {
5390 case ZPOOL_PROP_VERSION
:
5392 * Only set version for non-zpool-creation cases
5393 * (set/import). spa_create() needs special care
5394 * for version setting.
5396 if (tx
->tx_txg
!= TXG_INITIAL
) {
5397 VERIFY(nvpair_value_uint64(elem
,
5399 ASSERT(intval
<= SPA_VERSION
);
5400 ASSERT(intval
>= spa_version(spa
));
5401 spa
->spa_uberblock
.ub_version
= intval
;
5402 vdev_config_dirty(spa
->spa_root_vdev
);
5406 case ZPOOL_PROP_ALTROOT
:
5408 * 'altroot' is a non-persistent property. It should
5409 * have been set temporarily at creation or import time.
5411 ASSERT(spa
->spa_root
!= NULL
);
5414 case ZPOOL_PROP_READONLY
:
5415 case ZPOOL_PROP_CACHEFILE
:
5417 * 'readonly' and 'cachefile' are also non-persisitent
5421 case ZPOOL_PROP_COMMENT
:
5422 VERIFY(nvpair_value_string(elem
, &strval
) == 0);
5423 if (spa
->spa_comment
!= NULL
)
5424 spa_strfree(spa
->spa_comment
);
5425 spa
->spa_comment
= spa_strdup(strval
);
5427 * We need to dirty the configuration on all the vdevs
5428 * so that their labels get updated. It's unnecessary
5429 * to do this for pool creation since the vdev's
5430 * configuratoin has already been dirtied.
5432 if (tx
->tx_txg
!= TXG_INITIAL
)
5433 vdev_config_dirty(spa
->spa_root_vdev
);
5437 * Set pool property values in the poolprops mos object.
5439 if (spa
->spa_pool_props_object
== 0) {
5440 VERIFY((spa
->spa_pool_props_object
=
5441 zap_create(mos
, DMU_OT_POOL_PROPS
,
5442 DMU_OT_NONE
, 0, tx
)) > 0);
5444 VERIFY(zap_update(mos
,
5445 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_PROPS
,
5446 8, 1, &spa
->spa_pool_props_object
, tx
)
5450 /* normalize the property name */
5451 propname
= zpool_prop_to_name(prop
);
5452 proptype
= zpool_prop_get_type(prop
);
5454 if (nvpair_type(elem
) == DATA_TYPE_STRING
) {
5455 ASSERT(proptype
== PROP_TYPE_STRING
);
5456 VERIFY(nvpair_value_string(elem
, &strval
) == 0);
5457 VERIFY(zap_update(mos
,
5458 spa
->spa_pool_props_object
, propname
,
5459 1, strlen(strval
) + 1, strval
, tx
) == 0);
5461 } else if (nvpair_type(elem
) == DATA_TYPE_UINT64
) {
5462 VERIFY(nvpair_value_uint64(elem
, &intval
) == 0);
5464 if (proptype
== PROP_TYPE_INDEX
) {
5466 VERIFY(zpool_prop_index_to_string(
5467 prop
, intval
, &unused
) == 0);
5469 VERIFY(zap_update(mos
,
5470 spa
->spa_pool_props_object
, propname
,
5471 8, 1, &intval
, tx
) == 0);
5473 ASSERT(0); /* not allowed */
5477 case ZPOOL_PROP_DELEGATION
:
5478 spa
->spa_delegation
= intval
;
5480 case ZPOOL_PROP_BOOTFS
:
5481 spa
->spa_bootfs
= intval
;
5483 case ZPOOL_PROP_FAILUREMODE
:
5484 spa
->spa_failmode
= intval
;
5486 case ZPOOL_PROP_AUTOEXPAND
:
5487 spa
->spa_autoexpand
= intval
;
5488 if (tx
->tx_txg
!= TXG_INITIAL
)
5489 spa_async_request(spa
,
5490 SPA_ASYNC_AUTOEXPAND
);
5492 case ZPOOL_PROP_DEDUPDITTO
:
5493 spa
->spa_dedup_ditto
= intval
;
5500 /* log internal history if this is not a zpool create */
5501 if (spa_version(spa
) >= SPA_VERSION_ZPOOL_HISTORY
&&
5502 tx
->tx_txg
!= TXG_INITIAL
) {
5503 spa_history_log_internal(LOG_POOL_PROPSET
,
5504 spa
, tx
, "%s %lld %s",
5505 nvpair_name(elem
), intval
, spa_name(spa
));
5509 mutex_exit(&spa
->spa_props_lock
);
5513 * Perform one-time upgrade on-disk changes. spa_version() does not
5514 * reflect the new version this txg, so there must be no changes this
5515 * txg to anything that the upgrade code depends on after it executes.
5516 * Therefore this must be called after dsl_pool_sync() does the sync
5520 spa_sync_upgrades(spa_t
*spa
, dmu_tx_t
*tx
)
5522 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5524 ASSERT(spa
->spa_sync_pass
== 1);
5526 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_ORIGIN
&&
5527 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_ORIGIN
) {
5528 dsl_pool_create_origin(dp
, tx
);
5530 /* Keeping the origin open increases spa_minref */
5531 spa
->spa_minref
+= 3;
5534 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_NEXT_CLONES
&&
5535 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_NEXT_CLONES
) {
5536 dsl_pool_upgrade_clones(dp
, tx
);
5539 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_DIR_CLONES
&&
5540 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_DIR_CLONES
) {
5541 dsl_pool_upgrade_dir_clones(dp
, tx
);
5543 /* Keeping the freedir open increases spa_minref */
5544 spa
->spa_minref
+= 3;
5549 * Sync the specified transaction group. New blocks may be dirtied as
5550 * part of the process, so we iterate until it converges.
5553 spa_sync(spa_t
*spa
, uint64_t txg
)
5555 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
5556 objset_t
*mos
= spa
->spa_meta_objset
;
5557 bpobj_t
*defer_bpo
= &spa
->spa_deferred_bpobj
;
5558 bplist_t
*free_bpl
= &spa
->spa_free_bplist
[txg
& TXG_MASK
];
5559 vdev_t
*rvd
= spa
->spa_root_vdev
;
5564 VERIFY(spa_writeable(spa
));
5567 * Lock out configuration changes.
5569 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5571 spa
->spa_syncing_txg
= txg
;
5572 spa
->spa_sync_pass
= 0;
5575 * If there are any pending vdev state changes, convert them
5576 * into config changes that go out with this transaction group.
5578 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5579 while (list_head(&spa
->spa_state_dirty_list
) != NULL
) {
5581 * We need the write lock here because, for aux vdevs,
5582 * calling vdev_config_dirty() modifies sav_config.
5583 * This is ugly and will become unnecessary when we
5584 * eliminate the aux vdev wart by integrating all vdevs
5585 * into the root vdev tree.
5587 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5588 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_WRITER
);
5589 while ((vd
= list_head(&spa
->spa_state_dirty_list
)) != NULL
) {
5590 vdev_state_clean(vd
);
5591 vdev_config_dirty(vd
);
5593 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
5594 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_READER
);
5596 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5598 tx
= dmu_tx_create_assigned(dp
, txg
);
5601 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
5602 * set spa_deflate if we have no raid-z vdevs.
5604 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_RAIDZ_DEFLATE
&&
5605 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
5608 for (i
= 0; i
< rvd
->vdev_children
; i
++) {
5609 vd
= rvd
->vdev_child
[i
];
5610 if (vd
->vdev_deflate_ratio
!= SPA_MINBLOCKSIZE
)
5613 if (i
== rvd
->vdev_children
) {
5614 spa
->spa_deflate
= TRUE
;
5615 VERIFY(0 == zap_add(spa
->spa_meta_objset
,
5616 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
5617 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
));
5622 * If anything has changed in this txg, or if someone is waiting
5623 * for this txg to sync (eg, spa_vdev_remove()), push the
5624 * deferred frees from the previous txg. If not, leave them
5625 * alone so that we don't generate work on an otherwise idle
5628 if (!txg_list_empty(&dp
->dp_dirty_datasets
, txg
) ||
5629 !txg_list_empty(&dp
->dp_dirty_dirs
, txg
) ||
5630 !txg_list_empty(&dp
->dp_sync_tasks
, txg
) ||
5631 ((dsl_scan_active(dp
->dp_scan
) ||
5632 txg_sync_waiting(dp
)) && !spa_shutting_down(spa
))) {
5633 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
5634 VERIFY3U(bpobj_iterate(defer_bpo
,
5635 spa_free_sync_cb
, zio
, tx
), ==, 0);
5636 VERIFY3U(zio_wait(zio
), ==, 0);
5640 * Iterate to convergence.
5643 int pass
= ++spa
->spa_sync_pass
;
5645 spa_sync_config_object(spa
, tx
);
5646 spa_sync_aux_dev(spa
, &spa
->spa_spares
, tx
,
5647 ZPOOL_CONFIG_SPARES
, DMU_POOL_SPARES
);
5648 spa_sync_aux_dev(spa
, &spa
->spa_l2cache
, tx
,
5649 ZPOOL_CONFIG_L2CACHE
, DMU_POOL_L2CACHE
);
5650 spa_errlog_sync(spa
, txg
);
5651 dsl_pool_sync(dp
, txg
);
5653 if (pass
<= SYNC_PASS_DEFERRED_FREE
) {
5654 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
5655 bplist_iterate(free_bpl
, spa_free_sync_cb
,
5657 VERIFY(zio_wait(zio
) == 0);
5659 bplist_iterate(free_bpl
, bpobj_enqueue_cb
,
5664 dsl_scan_sync(dp
, tx
);
5666 while (vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, txg
))
5670 spa_sync_upgrades(spa
, tx
);
5672 } while (dmu_objset_is_dirty(mos
, txg
));
5675 * Rewrite the vdev configuration (which includes the uberblock)
5676 * to commit the transaction group.
5678 * If there are no dirty vdevs, we sync the uberblock to a few
5679 * random top-level vdevs that are known to be visible in the
5680 * config cache (see spa_vdev_add() for a complete description).
5681 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
5685 * We hold SCL_STATE to prevent vdev open/close/etc.
5686 * while we're attempting to write the vdev labels.
5688 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5690 if (list_is_empty(&spa
->spa_config_dirty_list
)) {
5691 vdev_t
*svd
[SPA_DVAS_PER_BP
];
5693 int children
= rvd
->vdev_children
;
5694 int c0
= spa_get_random(children
);
5696 for (int c
= 0; c
< children
; c
++) {
5697 vd
= rvd
->vdev_child
[(c0
+ c
) % children
];
5698 if (vd
->vdev_ms_array
== 0 || vd
->vdev_islog
)
5700 svd
[svdcount
++] = vd
;
5701 if (svdcount
== SPA_DVAS_PER_BP
)
5704 error
= vdev_config_sync(svd
, svdcount
, txg
, B_FALSE
);
5706 error
= vdev_config_sync(svd
, svdcount
, txg
,
5709 error
= vdev_config_sync(rvd
->vdev_child
,
5710 rvd
->vdev_children
, txg
, B_FALSE
);
5712 error
= vdev_config_sync(rvd
->vdev_child
,
5713 rvd
->vdev_children
, txg
, B_TRUE
);
5716 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5720 zio_suspend(spa
, NULL
);
5721 zio_resume_wait(spa
);
5726 * Clear the dirty config list.
5728 while ((vd
= list_head(&spa
->spa_config_dirty_list
)) != NULL
)
5729 vdev_config_clean(vd
);
5732 * Now that the new config has synced transactionally,
5733 * let it become visible to the config cache.
5735 if (spa
->spa_config_syncing
!= NULL
) {
5736 spa_config_set(spa
, spa
->spa_config_syncing
);
5737 spa
->spa_config_txg
= txg
;
5738 spa
->spa_config_syncing
= NULL
;
5741 spa
->spa_ubsync
= spa
->spa_uberblock
;
5743 dsl_pool_sync_done(dp
, txg
);
5746 * Update usable space statistics.
5748 while (vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, TXG_CLEAN(txg
)))
5749 vdev_sync_done(vd
, txg
);
5751 spa_update_dspace(spa
);
5754 * It had better be the case that we didn't dirty anything
5755 * since vdev_config_sync().
5757 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
, txg
));
5758 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
5759 ASSERT(txg_list_empty(&spa
->spa_vdev_txg_list
, txg
));
5761 spa
->spa_sync_pass
= 0;
5763 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5765 spa_handle_ignored_writes(spa
);
5768 * If any async tasks have been requested, kick them off.
5770 spa_async_dispatch(spa
);
5774 * Sync all pools. We don't want to hold the namespace lock across these
5775 * operations, so we take a reference on the spa_t and drop the lock during the
5779 spa_sync_allpools(void)
5782 mutex_enter(&spa_namespace_lock
);
5783 while ((spa
= spa_next(spa
)) != NULL
) {
5784 if (spa_state(spa
) != POOL_STATE_ACTIVE
||
5785 !spa_writeable(spa
) || spa_suspended(spa
))
5787 spa_open_ref(spa
, FTAG
);
5788 mutex_exit(&spa_namespace_lock
);
5789 txg_wait_synced(spa_get_dsl(spa
), 0);
5790 mutex_enter(&spa_namespace_lock
);
5791 spa_close(spa
, FTAG
);
5793 mutex_exit(&spa_namespace_lock
);
5797 * ==========================================================================
5798 * Miscellaneous routines
5799 * ==========================================================================
5803 * Remove all pools in the system.
5811 * Remove all cached state. All pools should be closed now,
5812 * so every spa in the AVL tree should be unreferenced.
5814 mutex_enter(&spa_namespace_lock
);
5815 while ((spa
= spa_next(NULL
)) != NULL
) {
5817 * Stop async tasks. The async thread may need to detach
5818 * a device that's been replaced, which requires grabbing
5819 * spa_namespace_lock, so we must drop it here.
5821 spa_open_ref(spa
, FTAG
);
5822 mutex_exit(&spa_namespace_lock
);
5823 spa_async_suspend(spa
);
5824 mutex_enter(&spa_namespace_lock
);
5825 spa_close(spa
, FTAG
);
5827 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
5829 spa_deactivate(spa
);
5833 mutex_exit(&spa_namespace_lock
);
5837 spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
, boolean_t aux
)
5842 if ((vd
= vdev_lookup_by_guid(spa
->spa_root_vdev
, guid
)) != NULL
)
5846 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
5847 vd
= spa
->spa_l2cache
.sav_vdevs
[i
];
5848 if (vd
->vdev_guid
== guid
)
5852 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
5853 vd
= spa
->spa_spares
.sav_vdevs
[i
];
5854 if (vd
->vdev_guid
== guid
)
5863 spa_upgrade(spa_t
*spa
, uint64_t version
)
5865 ASSERT(spa_writeable(spa
));
5867 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5870 * This should only be called for a non-faulted pool, and since a
5871 * future version would result in an unopenable pool, this shouldn't be
5874 ASSERT(spa
->spa_uberblock
.ub_version
<= SPA_VERSION
);
5875 ASSERT(version
>= spa
->spa_uberblock
.ub_version
);
5877 spa
->spa_uberblock
.ub_version
= version
;
5878 vdev_config_dirty(spa
->spa_root_vdev
);
5880 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5882 txg_wait_synced(spa_get_dsl(spa
), 0);
5886 spa_has_spare(spa_t
*spa
, uint64_t guid
)
5890 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
5892 for (i
= 0; i
< sav
->sav_count
; i
++)
5893 if (sav
->sav_vdevs
[i
]->vdev_guid
== guid
)
5896 for (i
= 0; i
< sav
->sav_npending
; i
++) {
5897 if (nvlist_lookup_uint64(sav
->sav_pending
[i
], ZPOOL_CONFIG_GUID
,
5898 &spareguid
) == 0 && spareguid
== guid
)
5906 * Check if a pool has an active shared spare device.
5907 * Note: reference count of an active spare is 2, as a spare and as a replace
5910 spa_has_active_shared_spare(spa_t
*spa
)
5914 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
5916 for (i
= 0; i
< sav
->sav_count
; i
++) {
5917 if (spa_spare_exists(sav
->sav_vdevs
[i
]->vdev_guid
, &pool
,
5918 &refcnt
) && pool
!= 0ULL && pool
== spa_guid(spa
) &&
5927 * Post a sysevent corresponding to the given event. The 'name' must be one of
5928 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
5929 * filled in from the spa and (optionally) the vdev. This doesn't do anything
5930 * in the userland libzpool, as we don't want consumers to misinterpret ztest
5931 * or zdb as real changes.
5934 spa_event_notify(spa_t
*spa
, vdev_t
*vd
, const char *name
)
5938 sysevent_attr_list_t
*attr
= NULL
;
5939 sysevent_value_t value
;
5942 ev
= sysevent_alloc(EC_ZFS
, (char *)name
, SUNW_KERN_PUB
"zfs",
5945 value
.value_type
= SE_DATA_TYPE_STRING
;
5946 value
.value
.sv_string
= spa_name(spa
);
5947 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_NAME
, &value
, SE_SLEEP
) != 0)
5950 value
.value_type
= SE_DATA_TYPE_UINT64
;
5951 value
.value
.sv_uint64
= spa_guid(spa
);
5952 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_GUID
, &value
, SE_SLEEP
) != 0)
5956 value
.value_type
= SE_DATA_TYPE_UINT64
;
5957 value
.value
.sv_uint64
= vd
->vdev_guid
;
5958 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_GUID
, &value
,
5962 if (vd
->vdev_path
) {
5963 value
.value_type
= SE_DATA_TYPE_STRING
;
5964 value
.value
.sv_string
= vd
->vdev_path
;
5965 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_PATH
,
5966 &value
, SE_SLEEP
) != 0)
5971 if (sysevent_attach_attributes(ev
, attr
) != 0)
5975 (void) log_sysevent(ev
, SE_SLEEP
, &eid
);
5979 sysevent_free_attr(attr
);