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 (c) 2011, 2014 by Delphix. All rights reserved.
25 * Copyright (c) 2013, 2014, Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
30 * SPA: Storage Pool Allocator
32 * This file contains all the routines used when modifying on-disk SPA state.
33 * This includes opening, importing, destroying, exporting a pool, and syncing a
37 #include <sys/zfs_context.h>
38 #include <sys/fm/fs/zfs.h>
39 #include <sys/spa_impl.h>
41 #include <sys/zio_checksum.h>
43 #include <sys/dmu_tx.h>
47 #include <sys/vdev_impl.h>
48 #include <sys/metaslab.h>
49 #include <sys/metaslab_impl.h>
50 #include <sys/uberblock_impl.h>
53 #include <sys/dmu_traverse.h>
54 #include <sys/dmu_objset.h>
55 #include <sys/unique.h>
56 #include <sys/dsl_pool.h>
57 #include <sys/dsl_dataset.h>
58 #include <sys/dsl_dir.h>
59 #include <sys/dsl_prop.h>
60 #include <sys/dsl_synctask.h>
61 #include <sys/fs/zfs.h>
63 #include <sys/callb.h>
64 #include <sys/systeminfo.h>
65 #include <sys/spa_boot.h>
66 #include <sys/zfs_ioctl.h>
67 #include <sys/dsl_scan.h>
68 #include <sys/zfeature.h>
69 #include <sys/dsl_destroy.h>
72 #include <sys/bootprops.h>
73 #include <sys/callb.h>
74 #include <sys/cpupart.h>
76 #include <sys/sysdc.h>
81 #include "zfs_comutil.h"
84 * The interval, in seconds, at which failed configuration cache file writes
87 static int zfs_ccw_retry_interval
= 300;
89 typedef enum zti_modes
{
90 ZTI_MODE_FIXED
, /* value is # of threads (min 1) */
91 ZTI_MODE_BATCH
, /* cpu-intensive; value is ignored */
92 ZTI_MODE_NULL
, /* don't create a taskq */
96 #define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) }
97 #define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 }
98 #define ZTI_NULL { ZTI_MODE_NULL, 0, 0 }
100 #define ZTI_N(n) ZTI_P(n, 1)
101 #define ZTI_ONE ZTI_N(1)
103 typedef struct zio_taskq_info
{
104 zti_modes_t zti_mode
;
109 static const char *const zio_taskq_types
[ZIO_TASKQ_TYPES
] = {
110 "issue", "issue_high", "intr", "intr_high"
114 * This table defines the taskq settings for each ZFS I/O type. When
115 * initializing a pool, we use this table to create an appropriately sized
116 * taskq. Some operations are low volume and therefore have a small, static
117 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE
118 * macros. Other operations process a large amount of data; the ZTI_BATCH
119 * macro causes us to create a taskq oriented for throughput. Some operations
120 * are so high frequency and short-lived that the taskq itself can become a a
121 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an
122 * additional degree of parallelism specified by the number of threads per-
123 * taskq and the number of taskqs; when dispatching an event in this case, the
124 * particular taskq is chosen at random.
126 * The different taskq priorities are to handle the different contexts (issue
127 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that
128 * need to be handled with minimum delay.
130 const zio_taskq_info_t zio_taskqs
[ZIO_TYPES
][ZIO_TASKQ_TYPES
] = {
131 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */
132 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* NULL */
133 { ZTI_N(8), ZTI_NULL
, ZTI_P(12, 8), ZTI_NULL
}, /* READ */
134 { ZTI_BATCH
, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */
135 { ZTI_P(12, 8), ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* FREE */
136 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* CLAIM */
137 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* IOCTL */
140 static void spa_sync_version(void *arg
, dmu_tx_t
*tx
);
141 static void spa_sync_props(void *arg
, dmu_tx_t
*tx
);
142 static boolean_t
spa_has_active_shared_spare(spa_t
*spa
);
143 static int spa_load_impl(spa_t
*spa
, uint64_t, nvlist_t
*config
,
144 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
146 static void spa_vdev_resilver_done(spa_t
*spa
);
148 uint_t zio_taskq_batch_pct
= 75; /* 1 thread per cpu in pset */
149 id_t zio_taskq_psrset_bind
= PS_NONE
;
150 boolean_t zio_taskq_sysdc
= B_TRUE
; /* use SDC scheduling class */
151 uint_t zio_taskq_basedc
= 80; /* base duty cycle */
153 boolean_t spa_create_process
= B_TRUE
; /* no process ==> no sysdc */
154 extern int zfs_sync_pass_deferred_free
;
157 * This (illegal) pool name is used when temporarily importing a spa_t in order
158 * to get the vdev stats associated with the imported devices.
160 #define TRYIMPORT_NAME "$import"
163 * ==========================================================================
164 * SPA properties routines
165 * ==========================================================================
169 * Add a (source=src, propname=propval) list to an nvlist.
172 spa_prop_add_list(nvlist_t
*nvl
, zpool_prop_t prop
, char *strval
,
173 uint64_t intval
, zprop_source_t src
)
175 const char *propname
= zpool_prop_to_name(prop
);
178 VERIFY(nvlist_alloc(&propval
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
179 VERIFY(nvlist_add_uint64(propval
, ZPROP_SOURCE
, src
) == 0);
182 VERIFY(nvlist_add_string(propval
, ZPROP_VALUE
, strval
) == 0);
184 VERIFY(nvlist_add_uint64(propval
, ZPROP_VALUE
, intval
) == 0);
186 VERIFY(nvlist_add_nvlist(nvl
, propname
, propval
) == 0);
187 nvlist_free(propval
);
191 * Get property values from the spa configuration.
194 spa_prop_get_config(spa_t
*spa
, nvlist_t
**nvp
)
196 vdev_t
*rvd
= spa
->spa_root_vdev
;
197 dsl_pool_t
*pool
= spa
->spa_dsl_pool
;
198 uint64_t size
, alloc
, cap
, version
;
199 zprop_source_t src
= ZPROP_SRC_NONE
;
200 spa_config_dirent_t
*dp
;
201 metaslab_class_t
*mc
= spa_normal_class(spa
);
203 ASSERT(MUTEX_HELD(&spa
->spa_props_lock
));
206 alloc
= metaslab_class_get_alloc(spa_normal_class(spa
));
207 size
= metaslab_class_get_space(spa_normal_class(spa
));
208 spa_prop_add_list(*nvp
, ZPOOL_PROP_NAME
, spa_name(spa
), 0, src
);
209 spa_prop_add_list(*nvp
, ZPOOL_PROP_SIZE
, NULL
, size
, src
);
210 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALLOCATED
, NULL
, alloc
, src
);
211 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREE
, NULL
,
214 spa_prop_add_list(*nvp
, ZPOOL_PROP_FRAGMENTATION
, NULL
,
215 metaslab_class_fragmentation(mc
), src
);
216 spa_prop_add_list(*nvp
, ZPOOL_PROP_EXPANDSZ
, NULL
,
217 metaslab_class_expandable_space(mc
), src
);
218 spa_prop_add_list(*nvp
, ZPOOL_PROP_READONLY
, NULL
,
219 (spa_mode(spa
) == FREAD
), src
);
221 cap
= (size
== 0) ? 0 : (alloc
* 100 / size
);
222 spa_prop_add_list(*nvp
, ZPOOL_PROP_CAPACITY
, NULL
, cap
, src
);
224 spa_prop_add_list(*nvp
, ZPOOL_PROP_DEDUPRATIO
, NULL
,
225 ddt_get_pool_dedup_ratio(spa
), src
);
227 spa_prop_add_list(*nvp
, ZPOOL_PROP_HEALTH
, NULL
,
228 rvd
->vdev_state
, src
);
230 version
= spa_version(spa
);
231 if (version
== zpool_prop_default_numeric(ZPOOL_PROP_VERSION
))
232 src
= ZPROP_SRC_DEFAULT
;
234 src
= ZPROP_SRC_LOCAL
;
235 spa_prop_add_list(*nvp
, ZPOOL_PROP_VERSION
, NULL
, version
, src
);
240 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS,
241 * when opening pools before this version freedir will be NULL.
243 if (pool
->dp_free_dir
!= NULL
) {
244 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREEING
, NULL
,
245 dsl_dir_phys(pool
->dp_free_dir
)->dd_used_bytes
,
248 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREEING
,
252 if (pool
->dp_leak_dir
!= NULL
) {
253 spa_prop_add_list(*nvp
, ZPOOL_PROP_LEAKED
, NULL
,
254 dsl_dir_phys(pool
->dp_leak_dir
)->dd_used_bytes
,
257 spa_prop_add_list(*nvp
, ZPOOL_PROP_LEAKED
,
262 spa_prop_add_list(*nvp
, ZPOOL_PROP_GUID
, NULL
, spa_guid(spa
), src
);
264 if (spa
->spa_comment
!= NULL
) {
265 spa_prop_add_list(*nvp
, ZPOOL_PROP_COMMENT
, spa
->spa_comment
,
269 if (spa
->spa_root
!= NULL
)
270 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALTROOT
, spa
->spa_root
,
273 if (spa_feature_is_enabled(spa
, SPA_FEATURE_LARGE_BLOCKS
)) {
274 spa_prop_add_list(*nvp
, ZPOOL_PROP_MAXBLOCKSIZE
, NULL
,
275 MIN(zfs_max_recordsize
, SPA_MAXBLOCKSIZE
), ZPROP_SRC_NONE
);
277 spa_prop_add_list(*nvp
, ZPOOL_PROP_MAXBLOCKSIZE
, NULL
,
278 SPA_OLD_MAXBLOCKSIZE
, ZPROP_SRC_NONE
);
281 if ((dp
= list_head(&spa
->spa_config_list
)) != NULL
) {
282 if (dp
->scd_path
== NULL
) {
283 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
284 "none", 0, ZPROP_SRC_LOCAL
);
285 } else if (strcmp(dp
->scd_path
, spa_config_path
) != 0) {
286 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
287 dp
->scd_path
, 0, ZPROP_SRC_LOCAL
);
293 * Get zpool property values.
296 spa_prop_get(spa_t
*spa
, nvlist_t
**nvp
)
298 objset_t
*mos
= spa
->spa_meta_objset
;
303 VERIFY(nvlist_alloc(nvp
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
305 mutex_enter(&spa
->spa_props_lock
);
308 * Get properties from the spa config.
310 spa_prop_get_config(spa
, nvp
);
312 /* If no pool property object, no more prop to get. */
313 if (mos
== NULL
|| spa
->spa_pool_props_object
== 0) {
314 mutex_exit(&spa
->spa_props_lock
);
319 * Get properties from the MOS pool property object.
321 for (zap_cursor_init(&zc
, mos
, spa
->spa_pool_props_object
);
322 (err
= zap_cursor_retrieve(&zc
, &za
)) == 0;
323 zap_cursor_advance(&zc
)) {
326 zprop_source_t src
= ZPROP_SRC_DEFAULT
;
329 if ((prop
= zpool_name_to_prop(za
.za_name
)) == ZPROP_INVAL
)
332 switch (za
.za_integer_length
) {
334 /* integer property */
335 if (za
.za_first_integer
!=
336 zpool_prop_default_numeric(prop
))
337 src
= ZPROP_SRC_LOCAL
;
339 if (prop
== ZPOOL_PROP_BOOTFS
) {
341 dsl_dataset_t
*ds
= NULL
;
343 dp
= spa_get_dsl(spa
);
344 dsl_pool_config_enter(dp
, FTAG
);
345 if (err
= dsl_dataset_hold_obj(dp
,
346 za
.za_first_integer
, FTAG
, &ds
)) {
347 dsl_pool_config_exit(dp
, FTAG
);
352 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1,
354 dsl_dataset_name(ds
, strval
);
355 dsl_dataset_rele(ds
, FTAG
);
356 dsl_pool_config_exit(dp
, FTAG
);
359 intval
= za
.za_first_integer
;
362 spa_prop_add_list(*nvp
, prop
, strval
, intval
, src
);
366 MAXNAMELEN
+ strlen(MOS_DIR_NAME
) + 1);
371 /* string property */
372 strval
= kmem_alloc(za
.za_num_integers
, KM_SLEEP
);
373 err
= zap_lookup(mos
, spa
->spa_pool_props_object
,
374 za
.za_name
, 1, za
.za_num_integers
, strval
);
376 kmem_free(strval
, za
.za_num_integers
);
379 spa_prop_add_list(*nvp
, prop
, strval
, 0, src
);
380 kmem_free(strval
, za
.za_num_integers
);
387 zap_cursor_fini(&zc
);
388 mutex_exit(&spa
->spa_props_lock
);
390 if (err
&& err
!= ENOENT
) {
400 * Validate the given pool properties nvlist and modify the list
401 * for the property values to be set.
404 spa_prop_validate(spa_t
*spa
, nvlist_t
*props
)
407 int error
= 0, reset_bootfs
= 0;
409 boolean_t has_feature
= B_FALSE
;
412 while ((elem
= nvlist_next_nvpair(props
, elem
)) != NULL
) {
414 char *strval
, *slash
, *check
, *fname
;
415 const char *propname
= nvpair_name(elem
);
416 zpool_prop_t prop
= zpool_name_to_prop(propname
);
420 if (!zpool_prop_feature(propname
)) {
421 error
= SET_ERROR(EINVAL
);
426 * Sanitize the input.
428 if (nvpair_type(elem
) != DATA_TYPE_UINT64
) {
429 error
= SET_ERROR(EINVAL
);
433 if (nvpair_value_uint64(elem
, &intval
) != 0) {
434 error
= SET_ERROR(EINVAL
);
439 error
= SET_ERROR(EINVAL
);
443 fname
= strchr(propname
, '@') + 1;
444 if (zfeature_lookup_name(fname
, NULL
) != 0) {
445 error
= SET_ERROR(EINVAL
);
449 has_feature
= B_TRUE
;
452 case ZPOOL_PROP_VERSION
:
453 error
= nvpair_value_uint64(elem
, &intval
);
455 (intval
< spa_version(spa
) ||
456 intval
> SPA_VERSION_BEFORE_FEATURES
||
458 error
= SET_ERROR(EINVAL
);
461 case ZPOOL_PROP_DELEGATION
:
462 case ZPOOL_PROP_AUTOREPLACE
:
463 case ZPOOL_PROP_LISTSNAPS
:
464 case ZPOOL_PROP_AUTOEXPAND
:
465 error
= nvpair_value_uint64(elem
, &intval
);
466 if (!error
&& intval
> 1)
467 error
= SET_ERROR(EINVAL
);
470 case ZPOOL_PROP_BOOTFS
:
472 * If the pool version is less than SPA_VERSION_BOOTFS,
473 * or the pool is still being created (version == 0),
474 * the bootfs property cannot be set.
476 if (spa_version(spa
) < SPA_VERSION_BOOTFS
) {
477 error
= SET_ERROR(ENOTSUP
);
482 * Make sure the vdev config is bootable
484 if (!vdev_is_bootable(spa
->spa_root_vdev
)) {
485 error
= SET_ERROR(ENOTSUP
);
491 error
= nvpair_value_string(elem
, &strval
);
497 if (strval
== NULL
|| strval
[0] == '\0') {
498 objnum
= zpool_prop_default_numeric(
503 if (error
= dmu_objset_hold(strval
, FTAG
, &os
))
507 * Must be ZPL, and its property settings
508 * must be supported by GRUB (compression
509 * is not gzip, and large blocks are not used).
512 if (dmu_objset_type(os
) != DMU_OST_ZFS
) {
513 error
= SET_ERROR(ENOTSUP
);
515 dsl_prop_get_int_ds(dmu_objset_ds(os
),
516 zfs_prop_to_name(ZFS_PROP_COMPRESSION
),
518 !BOOTFS_COMPRESS_VALID(propval
)) {
519 error
= SET_ERROR(ENOTSUP
);
521 dsl_prop_get_int_ds(dmu_objset_ds(os
),
522 zfs_prop_to_name(ZFS_PROP_RECORDSIZE
),
524 propval
> SPA_OLD_MAXBLOCKSIZE
) {
525 error
= SET_ERROR(ENOTSUP
);
527 objnum
= dmu_objset_id(os
);
529 dmu_objset_rele(os
, FTAG
);
533 case ZPOOL_PROP_FAILUREMODE
:
534 error
= nvpair_value_uint64(elem
, &intval
);
535 if (!error
&& (intval
< ZIO_FAILURE_MODE_WAIT
||
536 intval
> ZIO_FAILURE_MODE_PANIC
))
537 error
= SET_ERROR(EINVAL
);
540 * This is a special case which only occurs when
541 * the pool has completely failed. This allows
542 * the user to change the in-core failmode property
543 * without syncing it out to disk (I/Os might
544 * currently be blocked). We do this by returning
545 * EIO to the caller (spa_prop_set) to trick it
546 * into thinking we encountered a property validation
549 if (!error
&& spa_suspended(spa
)) {
550 spa
->spa_failmode
= intval
;
551 error
= SET_ERROR(EIO
);
555 case ZPOOL_PROP_CACHEFILE
:
556 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
559 if (strval
[0] == '\0')
562 if (strcmp(strval
, "none") == 0)
565 if (strval
[0] != '/') {
566 error
= SET_ERROR(EINVAL
);
570 slash
= strrchr(strval
, '/');
571 ASSERT(slash
!= NULL
);
573 if (slash
[1] == '\0' || strcmp(slash
, "/.") == 0 ||
574 strcmp(slash
, "/..") == 0)
575 error
= SET_ERROR(EINVAL
);
578 case ZPOOL_PROP_COMMENT
:
579 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
581 for (check
= strval
; *check
!= '\0'; check
++) {
583 * The kernel doesn't have an easy isprint()
584 * check. For this kernel check, we merely
585 * check ASCII apart from DEL. Fix this if
586 * there is an easy-to-use kernel isprint().
588 if (*check
>= 0x7f) {
589 error
= SET_ERROR(EINVAL
);
594 if (strlen(strval
) > ZPROP_MAX_COMMENT
)
598 case ZPOOL_PROP_DEDUPDITTO
:
599 if (spa_version(spa
) < SPA_VERSION_DEDUP
)
600 error
= SET_ERROR(ENOTSUP
);
602 error
= nvpair_value_uint64(elem
, &intval
);
604 intval
!= 0 && intval
< ZIO_DEDUPDITTO_MIN
)
605 error
= SET_ERROR(EINVAL
);
613 if (!error
&& reset_bootfs
) {
614 error
= nvlist_remove(props
,
615 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), DATA_TYPE_STRING
);
618 error
= nvlist_add_uint64(props
,
619 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), objnum
);
627 spa_configfile_set(spa_t
*spa
, nvlist_t
*nvp
, boolean_t need_sync
)
630 spa_config_dirent_t
*dp
;
632 if (nvlist_lookup_string(nvp
, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE
),
636 dp
= kmem_alloc(sizeof (spa_config_dirent_t
),
639 if (cachefile
[0] == '\0')
640 dp
->scd_path
= spa_strdup(spa_config_path
);
641 else if (strcmp(cachefile
, "none") == 0)
644 dp
->scd_path
= spa_strdup(cachefile
);
646 list_insert_head(&spa
->spa_config_list
, dp
);
648 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
652 spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
)
655 nvpair_t
*elem
= NULL
;
656 boolean_t need_sync
= B_FALSE
;
658 if ((error
= spa_prop_validate(spa
, nvp
)) != 0)
661 while ((elem
= nvlist_next_nvpair(nvp
, elem
)) != NULL
) {
662 zpool_prop_t prop
= zpool_name_to_prop(nvpair_name(elem
));
664 if (prop
== ZPOOL_PROP_CACHEFILE
||
665 prop
== ZPOOL_PROP_ALTROOT
||
666 prop
== ZPOOL_PROP_READONLY
)
669 if (prop
== ZPOOL_PROP_VERSION
|| prop
== ZPROP_INVAL
) {
672 if (prop
== ZPOOL_PROP_VERSION
) {
673 VERIFY(nvpair_value_uint64(elem
, &ver
) == 0);
675 ASSERT(zpool_prop_feature(nvpair_name(elem
)));
676 ver
= SPA_VERSION_FEATURES
;
680 /* Save time if the version is already set. */
681 if (ver
== spa_version(spa
))
685 * In addition to the pool directory object, we might
686 * create the pool properties object, the features for
687 * read object, the features for write object, or the
688 * feature descriptions object.
690 error
= dsl_sync_task(spa
->spa_name
, NULL
,
691 spa_sync_version
, &ver
,
692 6, ZFS_SPACE_CHECK_RESERVED
);
703 return (dsl_sync_task(spa
->spa_name
, NULL
, spa_sync_props
,
704 nvp
, 6, ZFS_SPACE_CHECK_RESERVED
));
711 * If the bootfs property value is dsobj, clear it.
714 spa_prop_clear_bootfs(spa_t
*spa
, uint64_t dsobj
, dmu_tx_t
*tx
)
716 if (spa
->spa_bootfs
== dsobj
&& spa
->spa_pool_props_object
!= 0) {
717 VERIFY(zap_remove(spa
->spa_meta_objset
,
718 spa
->spa_pool_props_object
,
719 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), tx
) == 0);
726 spa_change_guid_check(void *arg
, dmu_tx_t
*tx
)
728 uint64_t *newguid
= arg
;
729 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
730 vdev_t
*rvd
= spa
->spa_root_vdev
;
733 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
734 vdev_state
= rvd
->vdev_state
;
735 spa_config_exit(spa
, SCL_STATE
, FTAG
);
737 if (vdev_state
!= VDEV_STATE_HEALTHY
)
738 return (SET_ERROR(ENXIO
));
740 ASSERT3U(spa_guid(spa
), !=, *newguid
);
746 spa_change_guid_sync(void *arg
, dmu_tx_t
*tx
)
748 uint64_t *newguid
= arg
;
749 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
751 vdev_t
*rvd
= spa
->spa_root_vdev
;
753 oldguid
= spa_guid(spa
);
755 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
756 rvd
->vdev_guid
= *newguid
;
757 rvd
->vdev_guid_sum
+= (*newguid
- oldguid
);
758 vdev_config_dirty(rvd
);
759 spa_config_exit(spa
, SCL_STATE
, FTAG
);
761 spa_history_log_internal(spa
, "guid change", tx
, "old=%llu new=%llu",
766 * Change the GUID for the pool. This is done so that we can later
767 * re-import a pool built from a clone of our own vdevs. We will modify
768 * the root vdev's guid, our own pool guid, and then mark all of our
769 * vdevs dirty. Note that we must make sure that all our vdevs are
770 * online when we do this, or else any vdevs that weren't present
771 * would be orphaned from our pool. We are also going to issue a
772 * sysevent to update any watchers.
775 spa_change_guid(spa_t
*spa
)
780 mutex_enter(&spa
->spa_vdev_top_lock
);
781 mutex_enter(&spa_namespace_lock
);
782 guid
= spa_generate_guid(NULL
);
784 error
= dsl_sync_task(spa
->spa_name
, spa_change_guid_check
,
785 spa_change_guid_sync
, &guid
, 5, ZFS_SPACE_CHECK_RESERVED
);
788 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
789 spa_event_notify(spa
, NULL
, ESC_ZFS_POOL_REGUID
);
792 mutex_exit(&spa_namespace_lock
);
793 mutex_exit(&spa
->spa_vdev_top_lock
);
799 * ==========================================================================
800 * SPA state manipulation (open/create/destroy/import/export)
801 * ==========================================================================
805 spa_error_entry_compare(const void *a
, const void *b
)
807 spa_error_entry_t
*sa
= (spa_error_entry_t
*)a
;
808 spa_error_entry_t
*sb
= (spa_error_entry_t
*)b
;
811 ret
= bcmp(&sa
->se_bookmark
, &sb
->se_bookmark
,
812 sizeof (zbookmark_phys_t
));
823 * Utility function which retrieves copies of the current logs and
824 * re-initializes them in the process.
827 spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
)
829 ASSERT(MUTEX_HELD(&spa
->spa_errlist_lock
));
831 bcopy(&spa
->spa_errlist_last
, last
, sizeof (avl_tree_t
));
832 bcopy(&spa
->spa_errlist_scrub
, scrub
, sizeof (avl_tree_t
));
834 avl_create(&spa
->spa_errlist_scrub
,
835 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
836 offsetof(spa_error_entry_t
, se_avl
));
837 avl_create(&spa
->spa_errlist_last
,
838 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
839 offsetof(spa_error_entry_t
, se_avl
));
843 spa_taskqs_init(spa_t
*spa
, zio_type_t t
, zio_taskq_type_t q
)
845 const zio_taskq_info_t
*ztip
= &zio_taskqs
[t
][q
];
846 enum zti_modes mode
= ztip
->zti_mode
;
847 uint_t value
= ztip
->zti_value
;
848 uint_t count
= ztip
->zti_count
;
849 spa_taskqs_t
*tqs
= &spa
->spa_zio_taskq
[t
][q
];
852 boolean_t batch
= B_FALSE
;
854 if (mode
== ZTI_MODE_NULL
) {
856 tqs
->stqs_taskq
= NULL
;
860 ASSERT3U(count
, >, 0);
862 tqs
->stqs_count
= count
;
863 tqs
->stqs_taskq
= kmem_alloc(count
* sizeof (taskq_t
*), KM_SLEEP
);
867 ASSERT3U(value
, >=, 1);
868 value
= MAX(value
, 1);
873 flags
|= TASKQ_THREADS_CPU_PCT
;
874 value
= zio_taskq_batch_pct
;
878 panic("unrecognized mode for %s_%s taskq (%u:%u) in "
880 zio_type_name
[t
], zio_taskq_types
[q
], mode
, value
);
884 for (uint_t i
= 0; i
< count
; i
++) {
888 (void) snprintf(name
, sizeof (name
), "%s_%s_%u",
889 zio_type_name
[t
], zio_taskq_types
[q
], i
);
891 (void) snprintf(name
, sizeof (name
), "%s_%s",
892 zio_type_name
[t
], zio_taskq_types
[q
]);
895 if (zio_taskq_sysdc
&& spa
->spa_proc
!= &p0
) {
897 flags
|= TASKQ_DC_BATCH
;
899 tq
= taskq_create_sysdc(name
, value
, 50, INT_MAX
,
900 spa
->spa_proc
, zio_taskq_basedc
, flags
);
902 pri_t pri
= maxclsyspri
;
904 * The write issue taskq can be extremely CPU
905 * intensive. Run it at slightly lower priority
906 * than the other taskqs.
908 if (t
== ZIO_TYPE_WRITE
&& q
== ZIO_TASKQ_ISSUE
)
911 tq
= taskq_create_proc(name
, value
, pri
, 50,
912 INT_MAX
, spa
->spa_proc
, flags
);
915 tqs
->stqs_taskq
[i
] = tq
;
920 spa_taskqs_fini(spa_t
*spa
, zio_type_t t
, zio_taskq_type_t q
)
922 spa_taskqs_t
*tqs
= &spa
->spa_zio_taskq
[t
][q
];
924 if (tqs
->stqs_taskq
== NULL
) {
925 ASSERT0(tqs
->stqs_count
);
929 for (uint_t i
= 0; i
< tqs
->stqs_count
; i
++) {
930 ASSERT3P(tqs
->stqs_taskq
[i
], !=, NULL
);
931 taskq_destroy(tqs
->stqs_taskq
[i
]);
934 kmem_free(tqs
->stqs_taskq
, tqs
->stqs_count
* sizeof (taskq_t
*));
935 tqs
->stqs_taskq
= NULL
;
939 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority.
940 * Note that a type may have multiple discrete taskqs to avoid lock contention
941 * on the taskq itself. In that case we choose which taskq at random by using
942 * the low bits of gethrtime().
945 spa_taskq_dispatch_ent(spa_t
*spa
, zio_type_t t
, zio_taskq_type_t q
,
946 task_func_t
*func
, void *arg
, uint_t flags
, taskq_ent_t
*ent
)
948 spa_taskqs_t
*tqs
= &spa
->spa_zio_taskq
[t
][q
];
951 ASSERT3P(tqs
->stqs_taskq
, !=, NULL
);
952 ASSERT3U(tqs
->stqs_count
, !=, 0);
954 if (tqs
->stqs_count
== 1) {
955 tq
= tqs
->stqs_taskq
[0];
957 tq
= tqs
->stqs_taskq
[gethrtime() % tqs
->stqs_count
];
960 taskq_dispatch_ent(tq
, func
, arg
, flags
, ent
);
964 spa_create_zio_taskqs(spa_t
*spa
)
966 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
967 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
968 spa_taskqs_init(spa
, t
, q
);
975 spa_thread(void *arg
)
980 user_t
*pu
= PTOU(curproc
);
982 CALLB_CPR_INIT(&cprinfo
, &spa
->spa_proc_lock
, callb_generic_cpr
,
985 ASSERT(curproc
!= &p0
);
986 (void) snprintf(pu
->u_psargs
, sizeof (pu
->u_psargs
),
987 "zpool-%s", spa
->spa_name
);
988 (void) strlcpy(pu
->u_comm
, pu
->u_psargs
, sizeof (pu
->u_comm
));
990 /* bind this thread to the requested psrset */
991 if (zio_taskq_psrset_bind
!= PS_NONE
) {
993 mutex_enter(&cpu_lock
);
994 mutex_enter(&pidlock
);
995 mutex_enter(&curproc
->p_lock
);
997 if (cpupart_bind_thread(curthread
, zio_taskq_psrset_bind
,
998 0, NULL
, NULL
) == 0) {
999 curthread
->t_bind_pset
= zio_taskq_psrset_bind
;
1002 "Couldn't bind process for zfs pool \"%s\" to "
1003 "pset %d\n", spa
->spa_name
, zio_taskq_psrset_bind
);
1006 mutex_exit(&curproc
->p_lock
);
1007 mutex_exit(&pidlock
);
1008 mutex_exit(&cpu_lock
);
1012 if (zio_taskq_sysdc
) {
1013 sysdc_thread_enter(curthread
, 100, 0);
1016 spa
->spa_proc
= curproc
;
1017 spa
->spa_did
= curthread
->t_did
;
1019 spa_create_zio_taskqs(spa
);
1021 mutex_enter(&spa
->spa_proc_lock
);
1022 ASSERT(spa
->spa_proc_state
== SPA_PROC_CREATED
);
1024 spa
->spa_proc_state
= SPA_PROC_ACTIVE
;
1025 cv_broadcast(&spa
->spa_proc_cv
);
1027 CALLB_CPR_SAFE_BEGIN(&cprinfo
);
1028 while (spa
->spa_proc_state
== SPA_PROC_ACTIVE
)
1029 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
1030 CALLB_CPR_SAFE_END(&cprinfo
, &spa
->spa_proc_lock
);
1032 ASSERT(spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
);
1033 spa
->spa_proc_state
= SPA_PROC_GONE
;
1034 spa
->spa_proc
= &p0
;
1035 cv_broadcast(&spa
->spa_proc_cv
);
1036 CALLB_CPR_EXIT(&cprinfo
); /* drops spa_proc_lock */
1038 mutex_enter(&curproc
->p_lock
);
1044 * Activate an uninitialized pool.
1047 spa_activate(spa_t
*spa
, int mode
)
1049 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
1051 spa
->spa_state
= POOL_STATE_ACTIVE
;
1052 spa
->spa_mode
= mode
;
1054 spa
->spa_normal_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
1055 spa
->spa_log_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
1057 /* Try to create a covering process */
1058 mutex_enter(&spa
->spa_proc_lock
);
1059 ASSERT(spa
->spa_proc_state
== SPA_PROC_NONE
);
1060 ASSERT(spa
->spa_proc
== &p0
);
1063 /* Only create a process if we're going to be around a while. */
1064 if (spa_create_process
&& strcmp(spa
->spa_name
, TRYIMPORT_NAME
) != 0) {
1065 if (newproc(spa_thread
, (caddr_t
)spa
, syscid
, maxclsyspri
,
1067 spa
->spa_proc_state
= SPA_PROC_CREATED
;
1068 while (spa
->spa_proc_state
== SPA_PROC_CREATED
) {
1069 cv_wait(&spa
->spa_proc_cv
,
1070 &spa
->spa_proc_lock
);
1072 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
1073 ASSERT(spa
->spa_proc
!= &p0
);
1074 ASSERT(spa
->spa_did
!= 0);
1078 "Couldn't create process for zfs pool \"%s\"\n",
1083 mutex_exit(&spa
->spa_proc_lock
);
1085 /* If we didn't create a process, we need to create our taskqs. */
1086 if (spa
->spa_proc
== &p0
) {
1087 spa_create_zio_taskqs(spa
);
1090 list_create(&spa
->spa_config_dirty_list
, sizeof (vdev_t
),
1091 offsetof(vdev_t
, vdev_config_dirty_node
));
1092 list_create(&spa
->spa_evicting_os_list
, sizeof (objset_t
),
1093 offsetof(objset_t
, os_evicting_node
));
1094 list_create(&spa
->spa_state_dirty_list
, sizeof (vdev_t
),
1095 offsetof(vdev_t
, vdev_state_dirty_node
));
1097 txg_list_create(&spa
->spa_vdev_txg_list
,
1098 offsetof(struct vdev
, vdev_txg_node
));
1100 avl_create(&spa
->spa_errlist_scrub
,
1101 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
1102 offsetof(spa_error_entry_t
, se_avl
));
1103 avl_create(&spa
->spa_errlist_last
,
1104 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
1105 offsetof(spa_error_entry_t
, se_avl
));
1109 * Opposite of spa_activate().
1112 spa_deactivate(spa_t
*spa
)
1114 ASSERT(spa
->spa_sync_on
== B_FALSE
);
1115 ASSERT(spa
->spa_dsl_pool
== NULL
);
1116 ASSERT(spa
->spa_root_vdev
== NULL
);
1117 ASSERT(spa
->spa_async_zio_root
== NULL
);
1118 ASSERT(spa
->spa_state
!= POOL_STATE_UNINITIALIZED
);
1120 spa_evicting_os_wait(spa
);
1122 txg_list_destroy(&spa
->spa_vdev_txg_list
);
1124 list_destroy(&spa
->spa_config_dirty_list
);
1125 list_destroy(&spa
->spa_evicting_os_list
);
1126 list_destroy(&spa
->spa_state_dirty_list
);
1128 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
1129 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
1130 spa_taskqs_fini(spa
, t
, q
);
1134 metaslab_class_destroy(spa
->spa_normal_class
);
1135 spa
->spa_normal_class
= NULL
;
1137 metaslab_class_destroy(spa
->spa_log_class
);
1138 spa
->spa_log_class
= NULL
;
1141 * If this was part of an import or the open otherwise failed, we may
1142 * still have errors left in the queues. Empty them just in case.
1144 spa_errlog_drain(spa
);
1146 avl_destroy(&spa
->spa_errlist_scrub
);
1147 avl_destroy(&spa
->spa_errlist_last
);
1149 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
1151 mutex_enter(&spa
->spa_proc_lock
);
1152 if (spa
->spa_proc_state
!= SPA_PROC_NONE
) {
1153 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
1154 spa
->spa_proc_state
= SPA_PROC_DEACTIVATE
;
1155 cv_broadcast(&spa
->spa_proc_cv
);
1156 while (spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
) {
1157 ASSERT(spa
->spa_proc
!= &p0
);
1158 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
1160 ASSERT(spa
->spa_proc_state
== SPA_PROC_GONE
);
1161 spa
->spa_proc_state
= SPA_PROC_NONE
;
1163 ASSERT(spa
->spa_proc
== &p0
);
1164 mutex_exit(&spa
->spa_proc_lock
);
1167 * We want to make sure spa_thread() has actually exited the ZFS
1168 * module, so that the module can't be unloaded out from underneath
1171 if (spa
->spa_did
!= 0) {
1172 thread_join(spa
->spa_did
);
1178 * Verify a pool configuration, and construct the vdev tree appropriately. This
1179 * will create all the necessary vdevs in the appropriate layout, with each vdev
1180 * in the CLOSED state. This will prep the pool before open/creation/import.
1181 * All vdev validation is done by the vdev_alloc() routine.
1184 spa_config_parse(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
,
1185 uint_t id
, int atype
)
1191 if ((error
= vdev_alloc(spa
, vdp
, nv
, parent
, id
, atype
)) != 0)
1194 if ((*vdp
)->vdev_ops
->vdev_op_leaf
)
1197 error
= nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
1200 if (error
== ENOENT
)
1206 return (SET_ERROR(EINVAL
));
1209 for (int c
= 0; c
< children
; c
++) {
1211 if ((error
= spa_config_parse(spa
, &vd
, child
[c
], *vdp
, c
,
1219 ASSERT(*vdp
!= NULL
);
1225 * Opposite of spa_load().
1228 spa_unload(spa_t
*spa
)
1232 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1237 spa_async_suspend(spa
);
1242 if (spa
->spa_sync_on
) {
1243 txg_sync_stop(spa
->spa_dsl_pool
);
1244 spa
->spa_sync_on
= B_FALSE
;
1248 * Wait for any outstanding async I/O to complete.
1250 if (spa
->spa_async_zio_root
!= NULL
) {
1251 for (int i
= 0; i
< max_ncpus
; i
++)
1252 (void) zio_wait(spa
->spa_async_zio_root
[i
]);
1253 kmem_free(spa
->spa_async_zio_root
, max_ncpus
* sizeof (void *));
1254 spa
->spa_async_zio_root
= NULL
;
1257 bpobj_close(&spa
->spa_deferred_bpobj
);
1259 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1264 if (spa
->spa_root_vdev
)
1265 vdev_free(spa
->spa_root_vdev
);
1266 ASSERT(spa
->spa_root_vdev
== NULL
);
1269 * Close the dsl pool.
1271 if (spa
->spa_dsl_pool
) {
1272 dsl_pool_close(spa
->spa_dsl_pool
);
1273 spa
->spa_dsl_pool
= NULL
;
1274 spa
->spa_meta_objset
= NULL
;
1281 * Drop and purge level 2 cache
1283 spa_l2cache_drop(spa
);
1285 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1286 vdev_free(spa
->spa_spares
.sav_vdevs
[i
]);
1287 if (spa
->spa_spares
.sav_vdevs
) {
1288 kmem_free(spa
->spa_spares
.sav_vdevs
,
1289 spa
->spa_spares
.sav_count
* sizeof (void *));
1290 spa
->spa_spares
.sav_vdevs
= NULL
;
1292 if (spa
->spa_spares
.sav_config
) {
1293 nvlist_free(spa
->spa_spares
.sav_config
);
1294 spa
->spa_spares
.sav_config
= NULL
;
1296 spa
->spa_spares
.sav_count
= 0;
1298 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
1299 vdev_clear_stats(spa
->spa_l2cache
.sav_vdevs
[i
]);
1300 vdev_free(spa
->spa_l2cache
.sav_vdevs
[i
]);
1302 if (spa
->spa_l2cache
.sav_vdevs
) {
1303 kmem_free(spa
->spa_l2cache
.sav_vdevs
,
1304 spa
->spa_l2cache
.sav_count
* sizeof (void *));
1305 spa
->spa_l2cache
.sav_vdevs
= NULL
;
1307 if (spa
->spa_l2cache
.sav_config
) {
1308 nvlist_free(spa
->spa_l2cache
.sav_config
);
1309 spa
->spa_l2cache
.sav_config
= NULL
;
1311 spa
->spa_l2cache
.sav_count
= 0;
1313 spa
->spa_async_suspended
= 0;
1315 if (spa
->spa_comment
!= NULL
) {
1316 spa_strfree(spa
->spa_comment
);
1317 spa
->spa_comment
= NULL
;
1320 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1324 * Load (or re-load) the current list of vdevs describing the active spares for
1325 * this pool. When this is called, we have some form of basic information in
1326 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1327 * then re-generate a more complete list including status information.
1330 spa_load_spares(spa_t
*spa
)
1337 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1340 * First, close and free any existing spare vdevs.
1342 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1343 vd
= spa
->spa_spares
.sav_vdevs
[i
];
1345 /* Undo the call to spa_activate() below */
1346 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1347 B_FALSE
)) != NULL
&& tvd
->vdev_isspare
)
1348 spa_spare_remove(tvd
);
1353 if (spa
->spa_spares
.sav_vdevs
)
1354 kmem_free(spa
->spa_spares
.sav_vdevs
,
1355 spa
->spa_spares
.sav_count
* sizeof (void *));
1357 if (spa
->spa_spares
.sav_config
== NULL
)
1360 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
1361 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
1363 spa
->spa_spares
.sav_count
= (int)nspares
;
1364 spa
->spa_spares
.sav_vdevs
= NULL
;
1370 * Construct the array of vdevs, opening them to get status in the
1371 * process. For each spare, there is potentially two different vdev_t
1372 * structures associated with it: one in the list of spares (used only
1373 * for basic validation purposes) and one in the active vdev
1374 * configuration (if it's spared in). During this phase we open and
1375 * validate each vdev on the spare list. If the vdev also exists in the
1376 * active configuration, then we also mark this vdev as an active spare.
1378 spa
->spa_spares
.sav_vdevs
= kmem_alloc(nspares
* sizeof (void *),
1380 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1381 VERIFY(spa_config_parse(spa
, &vd
, spares
[i
], NULL
, 0,
1382 VDEV_ALLOC_SPARE
) == 0);
1385 spa
->spa_spares
.sav_vdevs
[i
] = vd
;
1387 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1388 B_FALSE
)) != NULL
) {
1389 if (!tvd
->vdev_isspare
)
1393 * We only mark the spare active if we were successfully
1394 * able to load the vdev. Otherwise, importing a pool
1395 * with a bad active spare would result in strange
1396 * behavior, because multiple pool would think the spare
1397 * is actively in use.
1399 * There is a vulnerability here to an equally bizarre
1400 * circumstance, where a dead active spare is later
1401 * brought back to life (onlined or otherwise). Given
1402 * the rarity of this scenario, and the extra complexity
1403 * it adds, we ignore the possibility.
1405 if (!vdev_is_dead(tvd
))
1406 spa_spare_activate(tvd
);
1410 vd
->vdev_aux
= &spa
->spa_spares
;
1412 if (vdev_open(vd
) != 0)
1415 if (vdev_validate_aux(vd
) == 0)
1420 * Recompute the stashed list of spares, with status information
1423 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
, ZPOOL_CONFIG_SPARES
,
1424 DATA_TYPE_NVLIST_ARRAY
) == 0);
1426 spares
= kmem_alloc(spa
->spa_spares
.sav_count
* sizeof (void *),
1428 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1429 spares
[i
] = vdev_config_generate(spa
,
1430 spa
->spa_spares
.sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_SPARE
);
1431 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
1432 ZPOOL_CONFIG_SPARES
, spares
, spa
->spa_spares
.sav_count
) == 0);
1433 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1434 nvlist_free(spares
[i
]);
1435 kmem_free(spares
, spa
->spa_spares
.sav_count
* sizeof (void *));
1439 * Load (or re-load) the current list of vdevs describing the active l2cache for
1440 * this pool. When this is called, we have some form of basic information in
1441 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1442 * then re-generate a more complete list including status information.
1443 * Devices which are already active have their details maintained, and are
1447 spa_load_l2cache(spa_t
*spa
)
1451 int i
, j
, oldnvdevs
;
1453 vdev_t
*vd
, **oldvdevs
, **newvdevs
;
1454 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
1456 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1458 if (sav
->sav_config
!= NULL
) {
1459 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
1460 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
1461 newvdevs
= kmem_alloc(nl2cache
* sizeof (void *), KM_SLEEP
);
1467 oldvdevs
= sav
->sav_vdevs
;
1468 oldnvdevs
= sav
->sav_count
;
1469 sav
->sav_vdevs
= NULL
;
1473 * Process new nvlist of vdevs.
1475 for (i
= 0; i
< nl2cache
; i
++) {
1476 VERIFY(nvlist_lookup_uint64(l2cache
[i
], ZPOOL_CONFIG_GUID
,
1480 for (j
= 0; j
< oldnvdevs
; j
++) {
1482 if (vd
!= NULL
&& guid
== vd
->vdev_guid
) {
1484 * Retain previous vdev for add/remove ops.
1492 if (newvdevs
[i
] == NULL
) {
1496 VERIFY(spa_config_parse(spa
, &vd
, l2cache
[i
], NULL
, 0,
1497 VDEV_ALLOC_L2CACHE
) == 0);
1502 * Commit this vdev as an l2cache device,
1503 * even if it fails to open.
1505 spa_l2cache_add(vd
);
1510 spa_l2cache_activate(vd
);
1512 if (vdev_open(vd
) != 0)
1515 (void) vdev_validate_aux(vd
);
1517 if (!vdev_is_dead(vd
))
1518 l2arc_add_vdev(spa
, vd
);
1523 * Purge vdevs that were dropped
1525 for (i
= 0; i
< oldnvdevs
; i
++) {
1530 ASSERT(vd
->vdev_isl2cache
);
1532 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
1533 pool
!= 0ULL && l2arc_vdev_present(vd
))
1534 l2arc_remove_vdev(vd
);
1535 vdev_clear_stats(vd
);
1541 kmem_free(oldvdevs
, oldnvdevs
* sizeof (void *));
1543 if (sav
->sav_config
== NULL
)
1546 sav
->sav_vdevs
= newvdevs
;
1547 sav
->sav_count
= (int)nl2cache
;
1550 * Recompute the stashed list of l2cache devices, with status
1551 * information this time.
1553 VERIFY(nvlist_remove(sav
->sav_config
, ZPOOL_CONFIG_L2CACHE
,
1554 DATA_TYPE_NVLIST_ARRAY
) == 0);
1556 l2cache
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
1557 for (i
= 0; i
< sav
->sav_count
; i
++)
1558 l2cache
[i
] = vdev_config_generate(spa
,
1559 sav
->sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_L2CACHE
);
1560 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
1561 ZPOOL_CONFIG_L2CACHE
, l2cache
, sav
->sav_count
) == 0);
1563 for (i
= 0; i
< sav
->sav_count
; i
++)
1564 nvlist_free(l2cache
[i
]);
1566 kmem_free(l2cache
, sav
->sav_count
* sizeof (void *));
1570 load_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
**value
)
1573 char *packed
= NULL
;
1578 error
= dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
);
1582 nvsize
= *(uint64_t *)db
->db_data
;
1583 dmu_buf_rele(db
, FTAG
);
1585 packed
= kmem_alloc(nvsize
, KM_SLEEP
);
1586 error
= dmu_read(spa
->spa_meta_objset
, obj
, 0, nvsize
, packed
,
1589 error
= nvlist_unpack(packed
, nvsize
, value
, 0);
1590 kmem_free(packed
, nvsize
);
1596 * Checks to see if the given vdev could not be opened, in which case we post a
1597 * sysevent to notify the autoreplace code that the device has been removed.
1600 spa_check_removed(vdev_t
*vd
)
1602 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1603 spa_check_removed(vd
->vdev_child
[c
]);
1605 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_is_dead(vd
) &&
1607 zfs_post_autoreplace(vd
->vdev_spa
, vd
);
1608 spa_event_notify(vd
->vdev_spa
, vd
, ESC_ZFS_VDEV_CHECK
);
1613 * Validate the current config against the MOS config
1616 spa_config_valid(spa_t
*spa
, nvlist_t
*config
)
1618 vdev_t
*mrvd
, *rvd
= spa
->spa_root_vdev
;
1621 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nv
) == 0);
1623 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1624 VERIFY(spa_config_parse(spa
, &mrvd
, nv
, NULL
, 0, VDEV_ALLOC_LOAD
) == 0);
1626 ASSERT3U(rvd
->vdev_children
, ==, mrvd
->vdev_children
);
1629 * If we're doing a normal import, then build up any additional
1630 * diagnostic information about missing devices in this config.
1631 * We'll pass this up to the user for further processing.
1633 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
)) {
1634 nvlist_t
**child
, *nv
;
1637 child
= kmem_alloc(rvd
->vdev_children
* sizeof (nvlist_t
**),
1639 VERIFY(nvlist_alloc(&nv
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
1641 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1642 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1643 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1645 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1646 mtvd
->vdev_ops
!= &vdev_missing_ops
&&
1648 child
[idx
++] = vdev_config_generate(spa
, mtvd
,
1653 VERIFY(nvlist_add_nvlist_array(nv
,
1654 ZPOOL_CONFIG_CHILDREN
, child
, idx
) == 0);
1655 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
1656 ZPOOL_CONFIG_MISSING_DEVICES
, nv
) == 0);
1658 for (int i
= 0; i
< idx
; i
++)
1659 nvlist_free(child
[i
]);
1662 kmem_free(child
, rvd
->vdev_children
* sizeof (char **));
1666 * Compare the root vdev tree with the information we have
1667 * from the MOS config (mrvd). Check each top-level vdev
1668 * with the corresponding MOS config top-level (mtvd).
1670 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1671 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1672 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1675 * Resolve any "missing" vdevs in the current configuration.
1676 * If we find that the MOS config has more accurate information
1677 * about the top-level vdev then use that vdev instead.
1679 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1680 mtvd
->vdev_ops
!= &vdev_missing_ops
) {
1682 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
))
1686 * Device specific actions.
1688 if (mtvd
->vdev_islog
) {
1689 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
1692 * XXX - once we have 'readonly' pool
1693 * support we should be able to handle
1694 * missing data devices by transitioning
1695 * the pool to readonly.
1701 * Swap the missing vdev with the data we were
1702 * able to obtain from the MOS config.
1704 vdev_remove_child(rvd
, tvd
);
1705 vdev_remove_child(mrvd
, mtvd
);
1707 vdev_add_child(rvd
, mtvd
);
1708 vdev_add_child(mrvd
, tvd
);
1710 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1712 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1715 } else if (mtvd
->vdev_islog
) {
1717 * Load the slog device's state from the MOS config
1718 * since it's possible that the label does not
1719 * contain the most up-to-date information.
1721 vdev_load_log_state(tvd
, mtvd
);
1726 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1729 * Ensure we were able to validate the config.
1731 return (rvd
->vdev_guid_sum
== spa
->spa_uberblock
.ub_guid_sum
);
1735 * Check for missing log devices
1738 spa_check_logs(spa_t
*spa
)
1740 boolean_t rv
= B_FALSE
;
1741 dsl_pool_t
*dp
= spa_get_dsl(spa
);
1743 switch (spa
->spa_log_state
) {
1744 case SPA_LOG_MISSING
:
1745 /* need to recheck in case slog has been restored */
1746 case SPA_LOG_UNKNOWN
:
1747 rv
= (dmu_objset_find_dp(dp
, dp
->dp_root_dir_obj
,
1748 zil_check_log_chain
, NULL
, DS_FIND_CHILDREN
) != 0);
1750 spa_set_log_state(spa
, SPA_LOG_MISSING
);
1757 spa_passivate_log(spa_t
*spa
)
1759 vdev_t
*rvd
= spa
->spa_root_vdev
;
1760 boolean_t slog_found
= B_FALSE
;
1762 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1764 if (!spa_has_slogs(spa
))
1767 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1768 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1769 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1771 if (tvd
->vdev_islog
) {
1772 metaslab_group_passivate(mg
);
1773 slog_found
= B_TRUE
;
1777 return (slog_found
);
1781 spa_activate_log(spa_t
*spa
)
1783 vdev_t
*rvd
= spa
->spa_root_vdev
;
1785 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1787 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1788 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1789 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1791 if (tvd
->vdev_islog
)
1792 metaslab_group_activate(mg
);
1797 spa_offline_log(spa_t
*spa
)
1801 error
= dmu_objset_find(spa_name(spa
), zil_vdev_offline
,
1802 NULL
, DS_FIND_CHILDREN
);
1805 * We successfully offlined the log device, sync out the
1806 * current txg so that the "stubby" block can be removed
1809 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1815 spa_aux_check_removed(spa_aux_vdev_t
*sav
)
1817 for (int i
= 0; i
< sav
->sav_count
; i
++)
1818 spa_check_removed(sav
->sav_vdevs
[i
]);
1822 spa_claim_notify(zio_t
*zio
)
1824 spa_t
*spa
= zio
->io_spa
;
1829 mutex_enter(&spa
->spa_props_lock
); /* any mutex will do */
1830 if (spa
->spa_claim_max_txg
< zio
->io_bp
->blk_birth
)
1831 spa
->spa_claim_max_txg
= zio
->io_bp
->blk_birth
;
1832 mutex_exit(&spa
->spa_props_lock
);
1835 typedef struct spa_load_error
{
1836 uint64_t sle_meta_count
;
1837 uint64_t sle_data_count
;
1841 spa_load_verify_done(zio_t
*zio
)
1843 blkptr_t
*bp
= zio
->io_bp
;
1844 spa_load_error_t
*sle
= zio
->io_private
;
1845 dmu_object_type_t type
= BP_GET_TYPE(bp
);
1846 int error
= zio
->io_error
;
1847 spa_t
*spa
= zio
->io_spa
;
1850 if ((BP_GET_LEVEL(bp
) != 0 || DMU_OT_IS_METADATA(type
)) &&
1851 type
!= DMU_OT_INTENT_LOG
)
1852 atomic_inc_64(&sle
->sle_meta_count
);
1854 atomic_inc_64(&sle
->sle_data_count
);
1856 zio_data_buf_free(zio
->io_data
, zio
->io_size
);
1858 mutex_enter(&spa
->spa_scrub_lock
);
1859 spa
->spa_scrub_inflight
--;
1860 cv_broadcast(&spa
->spa_scrub_io_cv
);
1861 mutex_exit(&spa
->spa_scrub_lock
);
1865 * Maximum number of concurrent scrub i/os to create while verifying
1866 * a pool while importing it.
1868 int spa_load_verify_maxinflight
= 10000;
1869 boolean_t spa_load_verify_metadata
= B_TRUE
;
1870 boolean_t spa_load_verify_data
= B_TRUE
;
1874 spa_load_verify_cb(spa_t
*spa
, zilog_t
*zilog
, const blkptr_t
*bp
,
1875 const zbookmark_phys_t
*zb
, const dnode_phys_t
*dnp
, void *arg
)
1877 if (BP_IS_HOLE(bp
) || BP_IS_EMBEDDED(bp
))
1880 * Note: normally this routine will not be called if
1881 * spa_load_verify_metadata is not set. However, it may be useful
1882 * to manually set the flag after the traversal has begun.
1884 if (!spa_load_verify_metadata
)
1886 if (BP_GET_BUFC_TYPE(bp
) == ARC_BUFC_DATA
&& !spa_load_verify_data
)
1890 size_t size
= BP_GET_PSIZE(bp
);
1891 void *data
= zio_data_buf_alloc(size
);
1893 mutex_enter(&spa
->spa_scrub_lock
);
1894 while (spa
->spa_scrub_inflight
>= spa_load_verify_maxinflight
)
1895 cv_wait(&spa
->spa_scrub_io_cv
, &spa
->spa_scrub_lock
);
1896 spa
->spa_scrub_inflight
++;
1897 mutex_exit(&spa
->spa_scrub_lock
);
1899 zio_nowait(zio_read(rio
, spa
, bp
, data
, size
,
1900 spa_load_verify_done
, rio
->io_private
, ZIO_PRIORITY_SCRUB
,
1901 ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_CANFAIL
|
1902 ZIO_FLAG_SCRUB
| ZIO_FLAG_RAW
, zb
));
1907 spa_load_verify(spa_t
*spa
)
1910 spa_load_error_t sle
= { 0 };
1911 zpool_rewind_policy_t policy
;
1912 boolean_t verify_ok
= B_FALSE
;
1915 zpool_get_rewind_policy(spa
->spa_config
, &policy
);
1917 if (policy
.zrp_request
& ZPOOL_NEVER_REWIND
)
1920 rio
= zio_root(spa
, NULL
, &sle
,
1921 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
);
1923 if (spa_load_verify_metadata
) {
1924 error
= traverse_pool(spa
, spa
->spa_verify_min_txg
,
1925 TRAVERSE_PRE
| TRAVERSE_PREFETCH_METADATA
,
1926 spa_load_verify_cb
, rio
);
1929 (void) zio_wait(rio
);
1931 spa
->spa_load_meta_errors
= sle
.sle_meta_count
;
1932 spa
->spa_load_data_errors
= sle
.sle_data_count
;
1934 if (!error
&& sle
.sle_meta_count
<= policy
.zrp_maxmeta
&&
1935 sle
.sle_data_count
<= policy
.zrp_maxdata
) {
1939 spa
->spa_load_txg
= spa
->spa_uberblock
.ub_txg
;
1940 spa
->spa_load_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
1942 loss
= spa
->spa_last_ubsync_txg_ts
- spa
->spa_load_txg_ts
;
1943 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1944 ZPOOL_CONFIG_LOAD_TIME
, spa
->spa_load_txg_ts
) == 0);
1945 VERIFY(nvlist_add_int64(spa
->spa_load_info
,
1946 ZPOOL_CONFIG_REWIND_TIME
, loss
) == 0);
1947 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1948 ZPOOL_CONFIG_LOAD_DATA_ERRORS
, sle
.sle_data_count
) == 0);
1950 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
;
1954 if (error
!= ENXIO
&& error
!= EIO
)
1955 error
= SET_ERROR(EIO
);
1959 return (verify_ok
? 0 : EIO
);
1963 * Find a value in the pool props object.
1966 spa_prop_find(spa_t
*spa
, zpool_prop_t prop
, uint64_t *val
)
1968 (void) zap_lookup(spa
->spa_meta_objset
, spa
->spa_pool_props_object
,
1969 zpool_prop_to_name(prop
), sizeof (uint64_t), 1, val
);
1973 * Find a value in the pool directory object.
1976 spa_dir_prop(spa_t
*spa
, const char *name
, uint64_t *val
)
1978 return (zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
1979 name
, sizeof (uint64_t), 1, val
));
1983 spa_vdev_err(vdev_t
*vdev
, vdev_aux_t aux
, int err
)
1985 vdev_set_state(vdev
, B_TRUE
, VDEV_STATE_CANT_OPEN
, aux
);
1990 * Fix up config after a partly-completed split. This is done with the
1991 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
1992 * pool have that entry in their config, but only the splitting one contains
1993 * a list of all the guids of the vdevs that are being split off.
1995 * This function determines what to do with that list: either rejoin
1996 * all the disks to the pool, or complete the splitting process. To attempt
1997 * the rejoin, each disk that is offlined is marked online again, and
1998 * we do a reopen() call. If the vdev label for every disk that was
1999 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
2000 * then we call vdev_split() on each disk, and complete the split.
2002 * Otherwise we leave the config alone, with all the vdevs in place in
2003 * the original pool.
2006 spa_try_repair(spa_t
*spa
, nvlist_t
*config
)
2013 boolean_t attempt_reopen
;
2015 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
, &nvl
) != 0)
2018 /* check that the config is complete */
2019 if (nvlist_lookup_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
2020 &glist
, &gcount
) != 0)
2023 vd
= kmem_zalloc(gcount
* sizeof (vdev_t
*), KM_SLEEP
);
2025 /* attempt to online all the vdevs & validate */
2026 attempt_reopen
= B_TRUE
;
2027 for (i
= 0; i
< gcount
; i
++) {
2028 if (glist
[i
] == 0) /* vdev is hole */
2031 vd
[i
] = spa_lookup_by_guid(spa
, glist
[i
], B_FALSE
);
2032 if (vd
[i
] == NULL
) {
2034 * Don't bother attempting to reopen the disks;
2035 * just do the split.
2037 attempt_reopen
= B_FALSE
;
2039 /* attempt to re-online it */
2040 vd
[i
]->vdev_offline
= B_FALSE
;
2044 if (attempt_reopen
) {
2045 vdev_reopen(spa
->spa_root_vdev
);
2047 /* check each device to see what state it's in */
2048 for (extracted
= 0, i
= 0; i
< gcount
; i
++) {
2049 if (vd
[i
] != NULL
&&
2050 vd
[i
]->vdev_stat
.vs_aux
!= VDEV_AUX_SPLIT_POOL
)
2057 * If every disk has been moved to the new pool, or if we never
2058 * even attempted to look at them, then we split them off for
2061 if (!attempt_reopen
|| gcount
== extracted
) {
2062 for (i
= 0; i
< gcount
; i
++)
2065 vdev_reopen(spa
->spa_root_vdev
);
2068 kmem_free(vd
, gcount
* sizeof (vdev_t
*));
2072 spa_load(spa_t
*spa
, spa_load_state_t state
, spa_import_type_t type
,
2073 boolean_t mosconfig
)
2075 nvlist_t
*config
= spa
->spa_config
;
2076 char *ereport
= FM_EREPORT_ZFS_POOL
;
2082 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
, &pool_guid
))
2083 return (SET_ERROR(EINVAL
));
2085 ASSERT(spa
->spa_comment
== NULL
);
2086 if (nvlist_lookup_string(config
, ZPOOL_CONFIG_COMMENT
, &comment
) == 0)
2087 spa
->spa_comment
= spa_strdup(comment
);
2090 * Versioning wasn't explicitly added to the label until later, so if
2091 * it's not present treat it as the initial version.
2093 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VERSION
,
2094 &spa
->spa_ubsync
.ub_version
) != 0)
2095 spa
->spa_ubsync
.ub_version
= SPA_VERSION_INITIAL
;
2097 (void) nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
2098 &spa
->spa_config_txg
);
2100 if ((state
== SPA_LOAD_IMPORT
|| state
== SPA_LOAD_TRYIMPORT
) &&
2101 spa_guid_exists(pool_guid
, 0)) {
2102 error
= SET_ERROR(EEXIST
);
2104 spa
->spa_config_guid
= pool_guid
;
2106 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
,
2108 VERIFY(nvlist_dup(nvl
, &spa
->spa_config_splitting
,
2112 nvlist_free(spa
->spa_load_info
);
2113 spa
->spa_load_info
= fnvlist_alloc();
2115 gethrestime(&spa
->spa_loaded_ts
);
2116 error
= spa_load_impl(spa
, pool_guid
, config
, state
, type
,
2117 mosconfig
, &ereport
);
2121 * Don't count references from objsets that are already closed
2122 * and are making their way through the eviction process.
2124 spa_evicting_os_wait(spa
);
2125 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
2127 if (error
!= EEXIST
) {
2128 spa
->spa_loaded_ts
.tv_sec
= 0;
2129 spa
->spa_loaded_ts
.tv_nsec
= 0;
2131 if (error
!= EBADF
) {
2132 zfs_ereport_post(ereport
, spa
, NULL
, NULL
, 0, 0);
2135 spa
->spa_load_state
= error
? SPA_LOAD_ERROR
: SPA_LOAD_NONE
;
2142 * Load an existing storage pool, using the pool's builtin spa_config as a
2143 * source of configuration information.
2146 spa_load_impl(spa_t
*spa
, uint64_t pool_guid
, nvlist_t
*config
,
2147 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
2151 nvlist_t
*nvroot
= NULL
;
2154 uberblock_t
*ub
= &spa
->spa_uberblock
;
2155 uint64_t children
, config_cache_txg
= spa
->spa_config_txg
;
2156 int orig_mode
= spa
->spa_mode
;
2159 boolean_t missing_feat_write
= B_FALSE
;
2162 * If this is an untrusted config, access the pool in read-only mode.
2163 * This prevents things like resilvering recently removed devices.
2166 spa
->spa_mode
= FREAD
;
2168 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
2170 spa
->spa_load_state
= state
;
2172 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvroot
))
2173 return (SET_ERROR(EINVAL
));
2175 parse
= (type
== SPA_IMPORT_EXISTING
?
2176 VDEV_ALLOC_LOAD
: VDEV_ALLOC_SPLIT
);
2179 * Create "The Godfather" zio to hold all async IOs
2181 spa
->spa_async_zio_root
= kmem_alloc(max_ncpus
* sizeof (void *),
2183 for (int i
= 0; i
< max_ncpus
; i
++) {
2184 spa
->spa_async_zio_root
[i
] = zio_root(spa
, NULL
, NULL
,
2185 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
|
2186 ZIO_FLAG_GODFATHER
);
2190 * Parse the configuration into a vdev tree. We explicitly set the
2191 * value that will be returned by spa_version() since parsing the
2192 * configuration requires knowing the version number.
2194 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2195 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, parse
);
2196 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2201 ASSERT(spa
->spa_root_vdev
== rvd
);
2202 ASSERT3U(spa
->spa_min_ashift
, >=, SPA_MINBLOCKSHIFT
);
2203 ASSERT3U(spa
->spa_max_ashift
, <=, SPA_MAXBLOCKSHIFT
);
2205 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2206 ASSERT(spa_guid(spa
) == pool_guid
);
2210 * Try to open all vdevs, loading each label in the process.
2212 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2213 error
= vdev_open(rvd
);
2214 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2219 * We need to validate the vdev labels against the configuration that
2220 * we have in hand, which is dependent on the setting of mosconfig. If
2221 * mosconfig is true then we're validating the vdev labels based on
2222 * that config. Otherwise, we're validating against the cached config
2223 * (zpool.cache) that was read when we loaded the zfs module, and then
2224 * later we will recursively call spa_load() and validate against
2227 * If we're assembling a new pool that's been split off from an
2228 * existing pool, the labels haven't yet been updated so we skip
2229 * validation for now.
2231 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2232 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2233 error
= vdev_validate(rvd
, mosconfig
);
2234 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2239 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2240 return (SET_ERROR(ENXIO
));
2244 * Find the best uberblock.
2246 vdev_uberblock_load(rvd
, ub
, &label
);
2249 * If we weren't able to find a single valid uberblock, return failure.
2251 if (ub
->ub_txg
== 0) {
2253 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, ENXIO
));
2257 * If the pool has an unsupported version we can't open it.
2259 if (!SPA_VERSION_IS_SUPPORTED(ub
->ub_version
)) {
2261 return (spa_vdev_err(rvd
, VDEV_AUX_VERSION_NEWER
, ENOTSUP
));
2264 if (ub
->ub_version
>= SPA_VERSION_FEATURES
) {
2268 * If we weren't able to find what's necessary for reading the
2269 * MOS in the label, return failure.
2271 if (label
== NULL
|| nvlist_lookup_nvlist(label
,
2272 ZPOOL_CONFIG_FEATURES_FOR_READ
, &features
) != 0) {
2274 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2279 * Update our in-core representation with the definitive values
2282 nvlist_free(spa
->spa_label_features
);
2283 VERIFY(nvlist_dup(features
, &spa
->spa_label_features
, 0) == 0);
2289 * Look through entries in the label nvlist's features_for_read. If
2290 * there is a feature listed there which we don't understand then we
2291 * cannot open a pool.
2293 if (ub
->ub_version
>= SPA_VERSION_FEATURES
) {
2294 nvlist_t
*unsup_feat
;
2296 VERIFY(nvlist_alloc(&unsup_feat
, NV_UNIQUE_NAME
, KM_SLEEP
) ==
2299 for (nvpair_t
*nvp
= nvlist_next_nvpair(spa
->spa_label_features
,
2301 nvp
= nvlist_next_nvpair(spa
->spa_label_features
, nvp
)) {
2302 if (!zfeature_is_supported(nvpair_name(nvp
))) {
2303 VERIFY(nvlist_add_string(unsup_feat
,
2304 nvpair_name(nvp
), "") == 0);
2308 if (!nvlist_empty(unsup_feat
)) {
2309 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
2310 ZPOOL_CONFIG_UNSUP_FEAT
, unsup_feat
) == 0);
2311 nvlist_free(unsup_feat
);
2312 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
,
2316 nvlist_free(unsup_feat
);
2320 * If the vdev guid sum doesn't match the uberblock, we have an
2321 * incomplete configuration. We first check to see if the pool
2322 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
2323 * If it is, defer the vdev_guid_sum check till later so we
2324 * can handle missing vdevs.
2326 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VDEV_CHILDREN
,
2327 &children
) != 0 && mosconfig
&& type
!= SPA_IMPORT_ASSEMBLE
&&
2328 rvd
->vdev_guid_sum
!= ub
->ub_guid_sum
)
2329 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
, ENXIO
));
2331 if (type
!= SPA_IMPORT_ASSEMBLE
&& spa
->spa_config_splitting
) {
2332 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2333 spa_try_repair(spa
, config
);
2334 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2335 nvlist_free(spa
->spa_config_splitting
);
2336 spa
->spa_config_splitting
= NULL
;
2340 * Initialize internal SPA structures.
2342 spa
->spa_state
= POOL_STATE_ACTIVE
;
2343 spa
->spa_ubsync
= spa
->spa_uberblock
;
2344 spa
->spa_verify_min_txg
= spa
->spa_extreme_rewind
?
2345 TXG_INITIAL
- 1 : spa_last_synced_txg(spa
) - TXG_DEFER_SIZE
- 1;
2346 spa
->spa_first_txg
= spa
->spa_last_ubsync_txg
?
2347 spa
->spa_last_ubsync_txg
: spa_last_synced_txg(spa
) + 1;
2348 spa
->spa_claim_max_txg
= spa
->spa_first_txg
;
2349 spa
->spa_prev_software_version
= ub
->ub_software_version
;
2351 error
= dsl_pool_init(spa
, spa
->spa_first_txg
, &spa
->spa_dsl_pool
);
2353 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2354 spa
->spa_meta_objset
= spa
->spa_dsl_pool
->dp_meta_objset
;
2356 if (spa_dir_prop(spa
, DMU_POOL_CONFIG
, &spa
->spa_config_object
) != 0)
2357 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2359 if (spa_version(spa
) >= SPA_VERSION_FEATURES
) {
2360 boolean_t missing_feat_read
= B_FALSE
;
2361 nvlist_t
*unsup_feat
, *enabled_feat
;
2363 if (spa_dir_prop(spa
, DMU_POOL_FEATURES_FOR_READ
,
2364 &spa
->spa_feat_for_read_obj
) != 0) {
2365 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2368 if (spa_dir_prop(spa
, DMU_POOL_FEATURES_FOR_WRITE
,
2369 &spa
->spa_feat_for_write_obj
) != 0) {
2370 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2373 if (spa_dir_prop(spa
, DMU_POOL_FEATURE_DESCRIPTIONS
,
2374 &spa
->spa_feat_desc_obj
) != 0) {
2375 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2378 enabled_feat
= fnvlist_alloc();
2379 unsup_feat
= fnvlist_alloc();
2381 if (!spa_features_check(spa
, B_FALSE
,
2382 unsup_feat
, enabled_feat
))
2383 missing_feat_read
= B_TRUE
;
2385 if (spa_writeable(spa
) || state
== SPA_LOAD_TRYIMPORT
) {
2386 if (!spa_features_check(spa
, B_TRUE
,
2387 unsup_feat
, enabled_feat
)) {
2388 missing_feat_write
= B_TRUE
;
2392 fnvlist_add_nvlist(spa
->spa_load_info
,
2393 ZPOOL_CONFIG_ENABLED_FEAT
, enabled_feat
);
2395 if (!nvlist_empty(unsup_feat
)) {
2396 fnvlist_add_nvlist(spa
->spa_load_info
,
2397 ZPOOL_CONFIG_UNSUP_FEAT
, unsup_feat
);
2400 fnvlist_free(enabled_feat
);
2401 fnvlist_free(unsup_feat
);
2403 if (!missing_feat_read
) {
2404 fnvlist_add_boolean(spa
->spa_load_info
,
2405 ZPOOL_CONFIG_CAN_RDONLY
);
2409 * If the state is SPA_LOAD_TRYIMPORT, our objective is
2410 * twofold: to determine whether the pool is available for
2411 * import in read-write mode and (if it is not) whether the
2412 * pool is available for import in read-only mode. If the pool
2413 * is available for import in read-write mode, it is displayed
2414 * as available in userland; if it is not available for import
2415 * in read-only mode, it is displayed as unavailable in
2416 * userland. If the pool is available for import in read-only
2417 * mode but not read-write mode, it is displayed as unavailable
2418 * in userland with a special note that the pool is actually
2419 * available for open in read-only mode.
2421 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are
2422 * missing a feature for write, we must first determine whether
2423 * the pool can be opened read-only before returning to
2424 * userland in order to know whether to display the
2425 * abovementioned note.
2427 if (missing_feat_read
|| (missing_feat_write
&&
2428 spa_writeable(spa
))) {
2429 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
,
2434 * Load refcounts for ZFS features from disk into an in-memory
2435 * cache during SPA initialization.
2437 for (spa_feature_t i
= 0; i
< SPA_FEATURES
; i
++) {
2440 error
= feature_get_refcount_from_disk(spa
,
2441 &spa_feature_table
[i
], &refcount
);
2443 spa
->spa_feat_refcount_cache
[i
] = refcount
;
2444 } else if (error
== ENOTSUP
) {
2445 spa
->spa_feat_refcount_cache
[i
] =
2446 SPA_FEATURE_DISABLED
;
2448 return (spa_vdev_err(rvd
,
2449 VDEV_AUX_CORRUPT_DATA
, EIO
));
2454 if (spa_feature_is_active(spa
, SPA_FEATURE_ENABLED_TXG
)) {
2455 if (spa_dir_prop(spa
, DMU_POOL_FEATURE_ENABLED_TXG
,
2456 &spa
->spa_feat_enabled_txg_obj
) != 0)
2457 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2460 spa
->spa_is_initializing
= B_TRUE
;
2461 error
= dsl_pool_open(spa
->spa_dsl_pool
);
2462 spa
->spa_is_initializing
= B_FALSE
;
2464 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2468 nvlist_t
*policy
= NULL
, *nvconfig
;
2470 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2471 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2473 if (!spa_is_root(spa
) && nvlist_lookup_uint64(nvconfig
,
2474 ZPOOL_CONFIG_HOSTID
, &hostid
) == 0) {
2476 unsigned long myhostid
= 0;
2478 VERIFY(nvlist_lookup_string(nvconfig
,
2479 ZPOOL_CONFIG_HOSTNAME
, &hostname
) == 0);
2482 myhostid
= zone_get_hostid(NULL
);
2485 * We're emulating the system's hostid in userland, so
2486 * we can't use zone_get_hostid().
2488 (void) ddi_strtoul(hw_serial
, NULL
, 10, &myhostid
);
2489 #endif /* _KERNEL */
2490 if (hostid
!= 0 && myhostid
!= 0 &&
2491 hostid
!= myhostid
) {
2492 nvlist_free(nvconfig
);
2493 cmn_err(CE_WARN
, "pool '%s' could not be "
2494 "loaded as it was last accessed by "
2495 "another system (host: %s hostid: 0x%lx). "
2496 "See: http://illumos.org/msg/ZFS-8000-EY",
2497 spa_name(spa
), hostname
,
2498 (unsigned long)hostid
);
2499 return (SET_ERROR(EBADF
));
2502 if (nvlist_lookup_nvlist(spa
->spa_config
,
2503 ZPOOL_REWIND_POLICY
, &policy
) == 0)
2504 VERIFY(nvlist_add_nvlist(nvconfig
,
2505 ZPOOL_REWIND_POLICY
, policy
) == 0);
2507 spa_config_set(spa
, nvconfig
);
2509 spa_deactivate(spa
);
2510 spa_activate(spa
, orig_mode
);
2512 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, B_TRUE
));
2515 if (spa_dir_prop(spa
, DMU_POOL_SYNC_BPOBJ
, &obj
) != 0)
2516 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2517 error
= bpobj_open(&spa
->spa_deferred_bpobj
, spa
->spa_meta_objset
, obj
);
2519 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2522 * Load the bit that tells us to use the new accounting function
2523 * (raid-z deflation). If we have an older pool, this will not
2526 error
= spa_dir_prop(spa
, DMU_POOL_DEFLATE
, &spa
->spa_deflate
);
2527 if (error
!= 0 && error
!= ENOENT
)
2528 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2530 error
= spa_dir_prop(spa
, DMU_POOL_CREATION_VERSION
,
2531 &spa
->spa_creation_version
);
2532 if (error
!= 0 && error
!= ENOENT
)
2533 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2536 * Load the persistent error log. If we have an older pool, this will
2539 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_LAST
, &spa
->spa_errlog_last
);
2540 if (error
!= 0 && error
!= ENOENT
)
2541 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2543 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_SCRUB
,
2544 &spa
->spa_errlog_scrub
);
2545 if (error
!= 0 && error
!= ENOENT
)
2546 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2549 * Load the history object. If we have an older pool, this
2550 * will not be present.
2552 error
= spa_dir_prop(spa
, DMU_POOL_HISTORY
, &spa
->spa_history
);
2553 if (error
!= 0 && error
!= ENOENT
)
2554 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2557 * If we're assembling the pool from the split-off vdevs of
2558 * an existing pool, we don't want to attach the spares & cache
2563 * Load any hot spares for this pool.
2565 error
= spa_dir_prop(spa
, DMU_POOL_SPARES
, &spa
->spa_spares
.sav_object
);
2566 if (error
!= 0 && error
!= ENOENT
)
2567 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2568 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2569 ASSERT(spa_version(spa
) >= SPA_VERSION_SPARES
);
2570 if (load_nvlist(spa
, spa
->spa_spares
.sav_object
,
2571 &spa
->spa_spares
.sav_config
) != 0)
2572 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2574 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2575 spa_load_spares(spa
);
2576 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2577 } else if (error
== 0) {
2578 spa
->spa_spares
.sav_sync
= B_TRUE
;
2582 * Load any level 2 ARC devices for this pool.
2584 error
= spa_dir_prop(spa
, DMU_POOL_L2CACHE
,
2585 &spa
->spa_l2cache
.sav_object
);
2586 if (error
!= 0 && error
!= ENOENT
)
2587 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2588 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2589 ASSERT(spa_version(spa
) >= SPA_VERSION_L2CACHE
);
2590 if (load_nvlist(spa
, spa
->spa_l2cache
.sav_object
,
2591 &spa
->spa_l2cache
.sav_config
) != 0)
2592 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2594 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2595 spa_load_l2cache(spa
);
2596 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2597 } else if (error
== 0) {
2598 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
2601 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
2603 error
= spa_dir_prop(spa
, DMU_POOL_PROPS
, &spa
->spa_pool_props_object
);
2604 if (error
&& error
!= ENOENT
)
2605 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2608 uint64_t autoreplace
;
2610 spa_prop_find(spa
, ZPOOL_PROP_BOOTFS
, &spa
->spa_bootfs
);
2611 spa_prop_find(spa
, ZPOOL_PROP_AUTOREPLACE
, &autoreplace
);
2612 spa_prop_find(spa
, ZPOOL_PROP_DELEGATION
, &spa
->spa_delegation
);
2613 spa_prop_find(spa
, ZPOOL_PROP_FAILUREMODE
, &spa
->spa_failmode
);
2614 spa_prop_find(spa
, ZPOOL_PROP_AUTOEXPAND
, &spa
->spa_autoexpand
);
2615 spa_prop_find(spa
, ZPOOL_PROP_DEDUPDITTO
,
2616 &spa
->spa_dedup_ditto
);
2618 spa
->spa_autoreplace
= (autoreplace
!= 0);
2622 * If the 'autoreplace' property is set, then post a resource notifying
2623 * the ZFS DE that it should not issue any faults for unopenable
2624 * devices. We also iterate over the vdevs, and post a sysevent for any
2625 * unopenable vdevs so that the normal autoreplace handler can take
2628 if (spa
->spa_autoreplace
&& state
!= SPA_LOAD_TRYIMPORT
) {
2629 spa_check_removed(spa
->spa_root_vdev
);
2631 * For the import case, this is done in spa_import(), because
2632 * at this point we're using the spare definitions from
2633 * the MOS config, not necessarily from the userland config.
2635 if (state
!= SPA_LOAD_IMPORT
) {
2636 spa_aux_check_removed(&spa
->spa_spares
);
2637 spa_aux_check_removed(&spa
->spa_l2cache
);
2642 * Load the vdev state for all toplevel vdevs.
2647 * Propagate the leaf DTLs we just loaded all the way up the tree.
2649 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2650 vdev_dtl_reassess(rvd
, 0, 0, B_FALSE
);
2651 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2654 * Load the DDTs (dedup tables).
2656 error
= ddt_load(spa
);
2658 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2660 spa_update_dspace(spa
);
2663 * Validate the config, using the MOS config to fill in any
2664 * information which might be missing. If we fail to validate
2665 * the config then declare the pool unfit for use. If we're
2666 * assembling a pool from a split, the log is not transferred
2669 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2672 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2673 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2675 if (!spa_config_valid(spa
, nvconfig
)) {
2676 nvlist_free(nvconfig
);
2677 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
,
2680 nvlist_free(nvconfig
);
2683 * Now that we've validated the config, check the state of the
2684 * root vdev. If it can't be opened, it indicates one or
2685 * more toplevel vdevs are faulted.
2687 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2688 return (SET_ERROR(ENXIO
));
2690 if (spa_writeable(spa
) && spa_check_logs(spa
)) {
2691 *ereport
= FM_EREPORT_ZFS_LOG_REPLAY
;
2692 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_LOG
, ENXIO
));
2696 if (missing_feat_write
) {
2697 ASSERT(state
== SPA_LOAD_TRYIMPORT
);
2700 * At this point, we know that we can open the pool in
2701 * read-only mode but not read-write mode. We now have enough
2702 * information and can return to userland.
2704 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
, ENOTSUP
));
2708 * We've successfully opened the pool, verify that we're ready
2709 * to start pushing transactions.
2711 if (state
!= SPA_LOAD_TRYIMPORT
) {
2712 if (error
= spa_load_verify(spa
))
2713 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2717 if (spa_writeable(spa
) && (state
== SPA_LOAD_RECOVER
||
2718 spa
->spa_load_max_txg
== UINT64_MAX
)) {
2720 int need_update
= B_FALSE
;
2721 dsl_pool_t
*dp
= spa_get_dsl(spa
);
2723 ASSERT(state
!= SPA_LOAD_TRYIMPORT
);
2726 * Claim log blocks that haven't been committed yet.
2727 * This must all happen in a single txg.
2728 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2729 * invoked from zil_claim_log_block()'s i/o done callback.
2730 * Price of rollback is that we abandon the log.
2732 spa
->spa_claiming
= B_TRUE
;
2734 tx
= dmu_tx_create_assigned(dp
, spa_first_txg(spa
));
2735 (void) dmu_objset_find_dp(dp
, dp
->dp_root_dir_obj
,
2736 zil_claim
, tx
, DS_FIND_CHILDREN
);
2739 spa
->spa_claiming
= B_FALSE
;
2741 spa_set_log_state(spa
, SPA_LOG_GOOD
);
2742 spa
->spa_sync_on
= B_TRUE
;
2743 txg_sync_start(spa
->spa_dsl_pool
);
2746 * Wait for all claims to sync. We sync up to the highest
2747 * claimed log block birth time so that claimed log blocks
2748 * don't appear to be from the future. spa_claim_max_txg
2749 * will have been set for us by either zil_check_log_chain()
2750 * (invoked from spa_check_logs()) or zil_claim() above.
2752 txg_wait_synced(spa
->spa_dsl_pool
, spa
->spa_claim_max_txg
);
2755 * If the config cache is stale, or we have uninitialized
2756 * metaslabs (see spa_vdev_add()), then update the config.
2758 * If this is a verbatim import, trust the current
2759 * in-core spa_config and update the disk labels.
2761 if (config_cache_txg
!= spa
->spa_config_txg
||
2762 state
== SPA_LOAD_IMPORT
||
2763 state
== SPA_LOAD_RECOVER
||
2764 (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
))
2765 need_update
= B_TRUE
;
2767 for (int c
= 0; c
< rvd
->vdev_children
; c
++)
2768 if (rvd
->vdev_child
[c
]->vdev_ms_array
== 0)
2769 need_update
= B_TRUE
;
2772 * Update the config cache asychronously in case we're the
2773 * root pool, in which case the config cache isn't writable yet.
2776 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
2779 * Check all DTLs to see if anything needs resilvering.
2781 if (!dsl_scan_resilvering(spa
->spa_dsl_pool
) &&
2782 vdev_resilver_needed(rvd
, NULL
, NULL
))
2783 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
2786 * Log the fact that we booted up (so that we can detect if
2787 * we rebooted in the middle of an operation).
2789 spa_history_log_version(spa
, "open");
2792 * Delete any inconsistent datasets.
2794 (void) dmu_objset_find(spa_name(spa
),
2795 dsl_destroy_inconsistent
, NULL
, DS_FIND_CHILDREN
);
2798 * Clean up any stale temporary dataset userrefs.
2800 dsl_pool_clean_tmp_userrefs(spa
->spa_dsl_pool
);
2807 spa_load_retry(spa_t
*spa
, spa_load_state_t state
, int mosconfig
)
2809 int mode
= spa
->spa_mode
;
2812 spa_deactivate(spa
);
2814 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
- 1;
2816 spa_activate(spa
, mode
);
2817 spa_async_suspend(spa
);
2819 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, mosconfig
));
2823 * If spa_load() fails this function will try loading prior txg's. If
2824 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool
2825 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this
2826 * function will not rewind the pool and will return the same error as
2830 spa_load_best(spa_t
*spa
, spa_load_state_t state
, int mosconfig
,
2831 uint64_t max_request
, int rewind_flags
)
2833 nvlist_t
*loadinfo
= NULL
;
2834 nvlist_t
*config
= NULL
;
2835 int load_error
, rewind_error
;
2836 uint64_t safe_rewind_txg
;
2839 if (spa
->spa_load_txg
&& state
== SPA_LOAD_RECOVER
) {
2840 spa
->spa_load_max_txg
= spa
->spa_load_txg
;
2841 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2843 spa
->spa_load_max_txg
= max_request
;
2844 if (max_request
!= UINT64_MAX
)
2845 spa
->spa_extreme_rewind
= B_TRUE
;
2848 load_error
= rewind_error
= spa_load(spa
, state
, SPA_IMPORT_EXISTING
,
2850 if (load_error
== 0)
2853 if (spa
->spa_root_vdev
!= NULL
)
2854 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2856 spa
->spa_last_ubsync_txg
= spa
->spa_uberblock
.ub_txg
;
2857 spa
->spa_last_ubsync_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
2859 if (rewind_flags
& ZPOOL_NEVER_REWIND
) {
2860 nvlist_free(config
);
2861 return (load_error
);
2864 if (state
== SPA_LOAD_RECOVER
) {
2865 /* Price of rolling back is discarding txgs, including log */
2866 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2869 * If we aren't rolling back save the load info from our first
2870 * import attempt so that we can restore it after attempting
2873 loadinfo
= spa
->spa_load_info
;
2874 spa
->spa_load_info
= fnvlist_alloc();
2877 spa
->spa_load_max_txg
= spa
->spa_last_ubsync_txg
;
2878 safe_rewind_txg
= spa
->spa_last_ubsync_txg
- TXG_DEFER_SIZE
;
2879 min_txg
= (rewind_flags
& ZPOOL_EXTREME_REWIND
) ?
2880 TXG_INITIAL
: safe_rewind_txg
;
2883 * Continue as long as we're finding errors, we're still within
2884 * the acceptable rewind range, and we're still finding uberblocks
2886 while (rewind_error
&& spa
->spa_uberblock
.ub_txg
>= min_txg
&&
2887 spa
->spa_uberblock
.ub_txg
<= spa
->spa_load_max_txg
) {
2888 if (spa
->spa_load_max_txg
< safe_rewind_txg
)
2889 spa
->spa_extreme_rewind
= B_TRUE
;
2890 rewind_error
= spa_load_retry(spa
, state
, mosconfig
);
2893 spa
->spa_extreme_rewind
= B_FALSE
;
2894 spa
->spa_load_max_txg
= UINT64_MAX
;
2896 if (config
&& (rewind_error
|| state
!= SPA_LOAD_RECOVER
))
2897 spa_config_set(spa
, config
);
2899 if (state
== SPA_LOAD_RECOVER
) {
2900 ASSERT3P(loadinfo
, ==, NULL
);
2901 return (rewind_error
);
2903 /* Store the rewind info as part of the initial load info */
2904 fnvlist_add_nvlist(loadinfo
, ZPOOL_CONFIG_REWIND_INFO
,
2905 spa
->spa_load_info
);
2907 /* Restore the initial load info */
2908 fnvlist_free(spa
->spa_load_info
);
2909 spa
->spa_load_info
= loadinfo
;
2911 return (load_error
);
2918 * The import case is identical to an open except that the configuration is sent
2919 * down from userland, instead of grabbed from the configuration cache. For the
2920 * case of an open, the pool configuration will exist in the
2921 * POOL_STATE_UNINITIALIZED state.
2923 * The stats information (gen/count/ustats) is used to gather vdev statistics at
2924 * the same time open the pool, without having to keep around the spa_t in some
2928 spa_open_common(const char *pool
, spa_t
**spapp
, void *tag
, nvlist_t
*nvpolicy
,
2932 spa_load_state_t state
= SPA_LOAD_OPEN
;
2934 int locked
= B_FALSE
;
2939 * As disgusting as this is, we need to support recursive calls to this
2940 * function because dsl_dir_open() is called during spa_load(), and ends
2941 * up calling spa_open() again. The real fix is to figure out how to
2942 * avoid dsl_dir_open() calling this in the first place.
2944 if (mutex_owner(&spa_namespace_lock
) != curthread
) {
2945 mutex_enter(&spa_namespace_lock
);
2949 if ((spa
= spa_lookup(pool
)) == NULL
) {
2951 mutex_exit(&spa_namespace_lock
);
2952 return (SET_ERROR(ENOENT
));
2955 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
) {
2956 zpool_rewind_policy_t policy
;
2958 zpool_get_rewind_policy(nvpolicy
? nvpolicy
: spa
->spa_config
,
2960 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
2961 state
= SPA_LOAD_RECOVER
;
2963 spa_activate(spa
, spa_mode_global
);
2965 if (state
!= SPA_LOAD_RECOVER
)
2966 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
2968 error
= spa_load_best(spa
, state
, B_FALSE
, policy
.zrp_txg
,
2969 policy
.zrp_request
);
2971 if (error
== EBADF
) {
2973 * If vdev_validate() returns failure (indicated by
2974 * EBADF), it indicates that one of the vdevs indicates
2975 * that the pool has been exported or destroyed. If
2976 * this is the case, the config cache is out of sync and
2977 * we should remove the pool from the namespace.
2980 spa_deactivate(spa
);
2981 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
2984 mutex_exit(&spa_namespace_lock
);
2985 return (SET_ERROR(ENOENT
));
2990 * We can't open the pool, but we still have useful
2991 * information: the state of each vdev after the
2992 * attempted vdev_open(). Return this to the user.
2994 if (config
!= NULL
&& spa
->spa_config
) {
2995 VERIFY(nvlist_dup(spa
->spa_config
, config
,
2997 VERIFY(nvlist_add_nvlist(*config
,
2998 ZPOOL_CONFIG_LOAD_INFO
,
2999 spa
->spa_load_info
) == 0);
3002 spa_deactivate(spa
);
3003 spa
->spa_last_open_failed
= error
;
3005 mutex_exit(&spa_namespace_lock
);
3011 spa_open_ref(spa
, tag
);
3014 *config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
3017 * If we've recovered the pool, pass back any information we
3018 * gathered while doing the load.
3020 if (state
== SPA_LOAD_RECOVER
) {
3021 VERIFY(nvlist_add_nvlist(*config
, ZPOOL_CONFIG_LOAD_INFO
,
3022 spa
->spa_load_info
) == 0);
3026 spa
->spa_last_open_failed
= 0;
3027 spa
->spa_last_ubsync_txg
= 0;
3028 spa
->spa_load_txg
= 0;
3029 mutex_exit(&spa_namespace_lock
);
3038 spa_open_rewind(const char *name
, spa_t
**spapp
, void *tag
, nvlist_t
*policy
,
3041 return (spa_open_common(name
, spapp
, tag
, policy
, config
));
3045 spa_open(const char *name
, spa_t
**spapp
, void *tag
)
3047 return (spa_open_common(name
, spapp
, tag
, NULL
, NULL
));
3051 * Lookup the given spa_t, incrementing the inject count in the process,
3052 * preventing it from being exported or destroyed.
3055 spa_inject_addref(char *name
)
3059 mutex_enter(&spa_namespace_lock
);
3060 if ((spa
= spa_lookup(name
)) == NULL
) {
3061 mutex_exit(&spa_namespace_lock
);
3064 spa
->spa_inject_ref
++;
3065 mutex_exit(&spa_namespace_lock
);
3071 spa_inject_delref(spa_t
*spa
)
3073 mutex_enter(&spa_namespace_lock
);
3074 spa
->spa_inject_ref
--;
3075 mutex_exit(&spa_namespace_lock
);
3079 * Add spares device information to the nvlist.
3082 spa_add_spares(spa_t
*spa
, nvlist_t
*config
)
3092 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
3094 if (spa
->spa_spares
.sav_count
== 0)
3097 VERIFY(nvlist_lookup_nvlist(config
,
3098 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
3099 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
3100 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
3102 VERIFY(nvlist_add_nvlist_array(nvroot
,
3103 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3104 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
3105 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
3108 * Go through and find any spares which have since been
3109 * repurposed as an active spare. If this is the case, update
3110 * their status appropriately.
3112 for (i
= 0; i
< nspares
; i
++) {
3113 VERIFY(nvlist_lookup_uint64(spares
[i
],
3114 ZPOOL_CONFIG_GUID
, &guid
) == 0);
3115 if (spa_spare_exists(guid
, &pool
, NULL
) &&
3117 VERIFY(nvlist_lookup_uint64_array(
3118 spares
[i
], ZPOOL_CONFIG_VDEV_STATS
,
3119 (uint64_t **)&vs
, &vsc
) == 0);
3120 vs
->vs_state
= VDEV_STATE_CANT_OPEN
;
3121 vs
->vs_aux
= VDEV_AUX_SPARED
;
3128 * Add l2cache device information to the nvlist, including vdev stats.
3131 spa_add_l2cache(spa_t
*spa
, nvlist_t
*config
)
3134 uint_t i
, j
, nl2cache
;
3141 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
3143 if (spa
->spa_l2cache
.sav_count
== 0)
3146 VERIFY(nvlist_lookup_nvlist(config
,
3147 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
3148 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
3149 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
3150 if (nl2cache
!= 0) {
3151 VERIFY(nvlist_add_nvlist_array(nvroot
,
3152 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3153 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
3154 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
3157 * Update level 2 cache device stats.
3160 for (i
= 0; i
< nl2cache
; i
++) {
3161 VERIFY(nvlist_lookup_uint64(l2cache
[i
],
3162 ZPOOL_CONFIG_GUID
, &guid
) == 0);
3165 for (j
= 0; j
< spa
->spa_l2cache
.sav_count
; j
++) {
3167 spa
->spa_l2cache
.sav_vdevs
[j
]->vdev_guid
) {
3168 vd
= spa
->spa_l2cache
.sav_vdevs
[j
];
3174 VERIFY(nvlist_lookup_uint64_array(l2cache
[i
],
3175 ZPOOL_CONFIG_VDEV_STATS
, (uint64_t **)&vs
, &vsc
)
3177 vdev_get_stats(vd
, vs
);
3183 spa_add_feature_stats(spa_t
*spa
, nvlist_t
*config
)
3189 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
3190 VERIFY(nvlist_alloc(&features
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3192 if (spa
->spa_feat_for_read_obj
!= 0) {
3193 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
3194 spa
->spa_feat_for_read_obj
);
3195 zap_cursor_retrieve(&zc
, &za
) == 0;
3196 zap_cursor_advance(&zc
)) {
3197 ASSERT(za
.za_integer_length
== sizeof (uint64_t) &&
3198 za
.za_num_integers
== 1);
3199 VERIFY3U(0, ==, nvlist_add_uint64(features
, za
.za_name
,
3200 za
.za_first_integer
));
3202 zap_cursor_fini(&zc
);
3205 if (spa
->spa_feat_for_write_obj
!= 0) {
3206 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
3207 spa
->spa_feat_for_write_obj
);
3208 zap_cursor_retrieve(&zc
, &za
) == 0;
3209 zap_cursor_advance(&zc
)) {
3210 ASSERT(za
.za_integer_length
== sizeof (uint64_t) &&
3211 za
.za_num_integers
== 1);
3212 VERIFY3U(0, ==, nvlist_add_uint64(features
, za
.za_name
,
3213 za
.za_first_integer
));
3215 zap_cursor_fini(&zc
);
3218 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_FEATURE_STATS
,
3220 nvlist_free(features
);
3224 spa_get_stats(const char *name
, nvlist_t
**config
,
3225 char *altroot
, size_t buflen
)
3231 error
= spa_open_common(name
, &spa
, FTAG
, NULL
, config
);
3235 * This still leaves a window of inconsistency where the spares
3236 * or l2cache devices could change and the config would be
3237 * self-inconsistent.
3239 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3241 if (*config
!= NULL
) {
3242 uint64_t loadtimes
[2];
3244 loadtimes
[0] = spa
->spa_loaded_ts
.tv_sec
;
3245 loadtimes
[1] = spa
->spa_loaded_ts
.tv_nsec
;
3246 VERIFY(nvlist_add_uint64_array(*config
,
3247 ZPOOL_CONFIG_LOADED_TIME
, loadtimes
, 2) == 0);
3249 VERIFY(nvlist_add_uint64(*config
,
3250 ZPOOL_CONFIG_ERRCOUNT
,
3251 spa_get_errlog_size(spa
)) == 0);
3253 if (spa_suspended(spa
))
3254 VERIFY(nvlist_add_uint64(*config
,
3255 ZPOOL_CONFIG_SUSPENDED
,
3256 spa
->spa_failmode
) == 0);
3258 spa_add_spares(spa
, *config
);
3259 spa_add_l2cache(spa
, *config
);
3260 spa_add_feature_stats(spa
, *config
);
3265 * We want to get the alternate root even for faulted pools, so we cheat
3266 * and call spa_lookup() directly.
3270 mutex_enter(&spa_namespace_lock
);
3271 spa
= spa_lookup(name
);
3273 spa_altroot(spa
, altroot
, buflen
);
3277 mutex_exit(&spa_namespace_lock
);
3279 spa_altroot(spa
, altroot
, buflen
);
3284 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3285 spa_close(spa
, FTAG
);
3292 * Validate that the auxiliary device array is well formed. We must have an
3293 * array of nvlists, each which describes a valid leaf vdev. If this is an
3294 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
3295 * specified, as long as they are well-formed.
3298 spa_validate_aux_devs(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
,
3299 spa_aux_vdev_t
*sav
, const char *config
, uint64_t version
,
3300 vdev_labeltype_t label
)
3307 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
3310 * It's acceptable to have no devs specified.
3312 if (nvlist_lookup_nvlist_array(nvroot
, config
, &dev
, &ndev
) != 0)
3316 return (SET_ERROR(EINVAL
));
3319 * Make sure the pool is formatted with a version that supports this
3322 if (spa_version(spa
) < version
)
3323 return (SET_ERROR(ENOTSUP
));
3326 * Set the pending device list so we correctly handle device in-use
3329 sav
->sav_pending
= dev
;
3330 sav
->sav_npending
= ndev
;
3332 for (i
= 0; i
< ndev
; i
++) {
3333 if ((error
= spa_config_parse(spa
, &vd
, dev
[i
], NULL
, 0,
3337 if (!vd
->vdev_ops
->vdev_op_leaf
) {
3339 error
= SET_ERROR(EINVAL
);
3344 * The L2ARC currently only supports disk devices in
3345 * kernel context. For user-level testing, we allow it.
3348 if ((strcmp(config
, ZPOOL_CONFIG_L2CACHE
) == 0) &&
3349 strcmp(vd
->vdev_ops
->vdev_op_type
, VDEV_TYPE_DISK
) != 0) {
3350 error
= SET_ERROR(ENOTBLK
);
3357 if ((error
= vdev_open(vd
)) == 0 &&
3358 (error
= vdev_label_init(vd
, crtxg
, label
)) == 0) {
3359 VERIFY(nvlist_add_uint64(dev
[i
], ZPOOL_CONFIG_GUID
,
3360 vd
->vdev_guid
) == 0);
3366 (mode
!= VDEV_ALLOC_SPARE
&& mode
!= VDEV_ALLOC_L2CACHE
))
3373 sav
->sav_pending
= NULL
;
3374 sav
->sav_npending
= 0;
3379 spa_validate_aux(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
)
3383 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
3385 if ((error
= spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
3386 &spa
->spa_spares
, ZPOOL_CONFIG_SPARES
, SPA_VERSION_SPARES
,
3387 VDEV_LABEL_SPARE
)) != 0) {
3391 return (spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
3392 &spa
->spa_l2cache
, ZPOOL_CONFIG_L2CACHE
, SPA_VERSION_L2CACHE
,
3393 VDEV_LABEL_L2CACHE
));
3397 spa_set_aux_vdevs(spa_aux_vdev_t
*sav
, nvlist_t
**devs
, int ndevs
,
3402 if (sav
->sav_config
!= NULL
) {
3408 * Generate new dev list by concatentating with the
3411 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
, config
,
3412 &olddevs
, &oldndevs
) == 0);
3414 newdevs
= kmem_alloc(sizeof (void *) *
3415 (ndevs
+ oldndevs
), KM_SLEEP
);
3416 for (i
= 0; i
< oldndevs
; i
++)
3417 VERIFY(nvlist_dup(olddevs
[i
], &newdevs
[i
],
3419 for (i
= 0; i
< ndevs
; i
++)
3420 VERIFY(nvlist_dup(devs
[i
], &newdevs
[i
+ oldndevs
],
3423 VERIFY(nvlist_remove(sav
->sav_config
, config
,
3424 DATA_TYPE_NVLIST_ARRAY
) == 0);
3426 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
3427 config
, newdevs
, ndevs
+ oldndevs
) == 0);
3428 for (i
= 0; i
< oldndevs
+ ndevs
; i
++)
3429 nvlist_free(newdevs
[i
]);
3430 kmem_free(newdevs
, (oldndevs
+ ndevs
) * sizeof (void *));
3433 * Generate a new dev list.
3435 VERIFY(nvlist_alloc(&sav
->sav_config
, NV_UNIQUE_NAME
,
3437 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
, config
,
3443 * Stop and drop level 2 ARC devices
3446 spa_l2cache_drop(spa_t
*spa
)
3450 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
3452 for (i
= 0; i
< sav
->sav_count
; i
++) {
3455 vd
= sav
->sav_vdevs
[i
];
3458 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
3459 pool
!= 0ULL && l2arc_vdev_present(vd
))
3460 l2arc_remove_vdev(vd
);
3468 spa_create(const char *pool
, nvlist_t
*nvroot
, nvlist_t
*props
,
3472 char *altroot
= NULL
;
3477 uint64_t txg
= TXG_INITIAL
;
3478 nvlist_t
**spares
, **l2cache
;
3479 uint_t nspares
, nl2cache
;
3480 uint64_t version
, obj
;
3481 boolean_t has_features
;
3484 * If this pool already exists, return failure.
3486 mutex_enter(&spa_namespace_lock
);
3487 if (spa_lookup(pool
) != NULL
) {
3488 mutex_exit(&spa_namespace_lock
);
3489 return (SET_ERROR(EEXIST
));
3493 * Allocate a new spa_t structure.
3495 (void) nvlist_lookup_string(props
,
3496 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3497 spa
= spa_add(pool
, NULL
, altroot
);
3498 spa_activate(spa
, spa_mode_global
);
3500 if (props
&& (error
= spa_prop_validate(spa
, props
))) {
3501 spa_deactivate(spa
);
3503 mutex_exit(&spa_namespace_lock
);
3507 has_features
= B_FALSE
;
3508 for (nvpair_t
*elem
= nvlist_next_nvpair(props
, NULL
);
3509 elem
!= NULL
; elem
= nvlist_next_nvpair(props
, elem
)) {
3510 if (zpool_prop_feature(nvpair_name(elem
)))
3511 has_features
= B_TRUE
;
3514 if (has_features
|| nvlist_lookup_uint64(props
,
3515 zpool_prop_to_name(ZPOOL_PROP_VERSION
), &version
) != 0) {
3516 version
= SPA_VERSION
;
3518 ASSERT(SPA_VERSION_IS_SUPPORTED(version
));
3520 spa
->spa_first_txg
= txg
;
3521 spa
->spa_uberblock
.ub_txg
= txg
- 1;
3522 spa
->spa_uberblock
.ub_version
= version
;
3523 spa
->spa_ubsync
= spa
->spa_uberblock
;
3526 * Create "The Godfather" zio to hold all async IOs
3528 spa
->spa_async_zio_root
= kmem_alloc(max_ncpus
* sizeof (void *),
3530 for (int i
= 0; i
< max_ncpus
; i
++) {
3531 spa
->spa_async_zio_root
[i
] = zio_root(spa
, NULL
, NULL
,
3532 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
|
3533 ZIO_FLAG_GODFATHER
);
3537 * Create the root vdev.
3539 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3541 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, VDEV_ALLOC_ADD
);
3543 ASSERT(error
!= 0 || rvd
!= NULL
);
3544 ASSERT(error
!= 0 || spa
->spa_root_vdev
== rvd
);
3546 if (error
== 0 && !zfs_allocatable_devs(nvroot
))
3547 error
= SET_ERROR(EINVAL
);
3550 (error
= vdev_create(rvd
, txg
, B_FALSE
)) == 0 &&
3551 (error
= spa_validate_aux(spa
, nvroot
, txg
,
3552 VDEV_ALLOC_ADD
)) == 0) {
3553 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
3554 vdev_metaslab_set_size(rvd
->vdev_child
[c
]);
3555 vdev_expand(rvd
->vdev_child
[c
], txg
);
3559 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3563 spa_deactivate(spa
);
3565 mutex_exit(&spa_namespace_lock
);
3570 * Get the list of spares, if specified.
3572 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3573 &spares
, &nspares
) == 0) {
3574 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
, NV_UNIQUE_NAME
,
3576 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3577 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3578 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3579 spa_load_spares(spa
);
3580 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3581 spa
->spa_spares
.sav_sync
= B_TRUE
;
3585 * Get the list of level 2 cache devices, if specified.
3587 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3588 &l2cache
, &nl2cache
) == 0) {
3589 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3590 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3591 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3592 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3593 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3594 spa_load_l2cache(spa
);
3595 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3596 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3599 spa
->spa_is_initializing
= B_TRUE
;
3600 spa
->spa_dsl_pool
= dp
= dsl_pool_create(spa
, zplprops
, txg
);
3601 spa
->spa_meta_objset
= dp
->dp_meta_objset
;
3602 spa
->spa_is_initializing
= B_FALSE
;
3605 * Create DDTs (dedup tables).
3609 spa_update_dspace(spa
);
3611 tx
= dmu_tx_create_assigned(dp
, txg
);
3614 * Create the pool config object.
3616 spa
->spa_config_object
= dmu_object_alloc(spa
->spa_meta_objset
,
3617 DMU_OT_PACKED_NVLIST
, SPA_CONFIG_BLOCKSIZE
,
3618 DMU_OT_PACKED_NVLIST_SIZE
, sizeof (uint64_t), tx
);
3620 if (zap_add(spa
->spa_meta_objset
,
3621 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CONFIG
,
3622 sizeof (uint64_t), 1, &spa
->spa_config_object
, tx
) != 0) {
3623 cmn_err(CE_PANIC
, "failed to add pool config");
3626 if (spa_version(spa
) >= SPA_VERSION_FEATURES
)
3627 spa_feature_create_zap_objects(spa
, tx
);
3629 if (zap_add(spa
->spa_meta_objset
,
3630 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CREATION_VERSION
,
3631 sizeof (uint64_t), 1, &version
, tx
) != 0) {
3632 cmn_err(CE_PANIC
, "failed to add pool version");
3635 /* Newly created pools with the right version are always deflated. */
3636 if (version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
3637 spa
->spa_deflate
= TRUE
;
3638 if (zap_add(spa
->spa_meta_objset
,
3639 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
3640 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
) != 0) {
3641 cmn_err(CE_PANIC
, "failed to add deflate");
3646 * Create the deferred-free bpobj. Turn off compression
3647 * because sync-to-convergence takes longer if the blocksize
3650 obj
= bpobj_alloc(spa
->spa_meta_objset
, 1 << 14, tx
);
3651 dmu_object_set_compress(spa
->spa_meta_objset
, obj
,
3652 ZIO_COMPRESS_OFF
, tx
);
3653 if (zap_add(spa
->spa_meta_objset
,
3654 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_SYNC_BPOBJ
,
3655 sizeof (uint64_t), 1, &obj
, tx
) != 0) {
3656 cmn_err(CE_PANIC
, "failed to add bpobj");
3658 VERIFY3U(0, ==, bpobj_open(&spa
->spa_deferred_bpobj
,
3659 spa
->spa_meta_objset
, obj
));
3662 * Create the pool's history object.
3664 if (version
>= SPA_VERSION_ZPOOL_HISTORY
)
3665 spa_history_create_obj(spa
, tx
);
3668 * Set pool properties.
3670 spa
->spa_bootfs
= zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS
);
3671 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
3672 spa
->spa_failmode
= zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE
);
3673 spa
->spa_autoexpand
= zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND
);
3675 if (props
!= NULL
) {
3676 spa_configfile_set(spa
, props
, B_FALSE
);
3677 spa_sync_props(props
, tx
);
3682 spa
->spa_sync_on
= B_TRUE
;
3683 txg_sync_start(spa
->spa_dsl_pool
);
3686 * We explicitly wait for the first transaction to complete so that our
3687 * bean counters are appropriately updated.
3689 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
3691 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3693 spa_history_log_version(spa
, "create");
3696 * Don't count references from objsets that are already closed
3697 * and are making their way through the eviction process.
3699 spa_evicting_os_wait(spa
);
3700 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
3702 mutex_exit(&spa_namespace_lock
);
3709 * Get the root pool information from the root disk, then import the root pool
3710 * during the system boot up time.
3712 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t
**);
3715 spa_generate_rootconf(char *devpath
, char *devid
, uint64_t *guid
)
3718 nvlist_t
*nvtop
, *nvroot
;
3721 if (vdev_disk_read_rootlabel(devpath
, devid
, &config
) != 0)
3725 * Add this top-level vdev to the child array.
3727 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3729 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
3731 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_GUID
, guid
) == 0);
3734 * Put this pool's top-level vdevs into a root vdev.
3736 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3737 VERIFY(nvlist_add_string(nvroot
, ZPOOL_CONFIG_TYPE
,
3738 VDEV_TYPE_ROOT
) == 0);
3739 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_ID
, 0ULL) == 0);
3740 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_GUID
, pgid
) == 0);
3741 VERIFY(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
3745 * Replace the existing vdev_tree with the new root vdev in
3746 * this pool's configuration (remove the old, add the new).
3748 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, nvroot
) == 0);
3749 nvlist_free(nvroot
);
3754 * Walk the vdev tree and see if we can find a device with "better"
3755 * configuration. A configuration is "better" if the label on that
3756 * device has a more recent txg.
3759 spa_alt_rootvdev(vdev_t
*vd
, vdev_t
**avd
, uint64_t *txg
)
3761 for (int c
= 0; c
< vd
->vdev_children
; c
++)
3762 spa_alt_rootvdev(vd
->vdev_child
[c
], avd
, txg
);
3764 if (vd
->vdev_ops
->vdev_op_leaf
) {
3768 if (vdev_disk_read_rootlabel(vd
->vdev_physpath
, vd
->vdev_devid
,
3772 VERIFY(nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_TXG
,
3776 * Do we have a better boot device?
3778 if (label_txg
> *txg
) {
3787 * Import a root pool.
3789 * For x86. devpath_list will consist of devid and/or physpath name of
3790 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3791 * The GRUB "findroot" command will return the vdev we should boot.
3793 * For Sparc, devpath_list consists the physpath name of the booting device
3794 * no matter the rootpool is a single device pool or a mirrored pool.
3796 * "/pci@1f,0/ide@d/disk@0,0:a"
3799 spa_import_rootpool(char *devpath
, char *devid
)
3802 vdev_t
*rvd
, *bvd
, *avd
= NULL
;
3803 nvlist_t
*config
, *nvtop
;
3809 * Read the label from the boot device and generate a configuration.
3811 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3812 #if defined(_OBP) && defined(_KERNEL)
3813 if (config
== NULL
) {
3814 if (strstr(devpath
, "/iscsi/ssd") != NULL
) {
3816 get_iscsi_bootpath_phy(devpath
);
3817 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3821 if (config
== NULL
) {
3822 cmn_err(CE_NOTE
, "Cannot read the pool label from '%s'",
3824 return (SET_ERROR(EIO
));
3827 VERIFY(nvlist_lookup_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3829 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
, &txg
) == 0);
3831 mutex_enter(&spa_namespace_lock
);
3832 if ((spa
= spa_lookup(pname
)) != NULL
) {
3834 * Remove the existing root pool from the namespace so that we
3835 * can replace it with the correct config we just read in.
3840 spa
= spa_add(pname
, config
, NULL
);
3841 spa
->spa_is_root
= B_TRUE
;
3842 spa
->spa_import_flags
= ZFS_IMPORT_VERBATIM
;
3845 * Build up a vdev tree based on the boot device's label config.
3847 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3849 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3850 error
= spa_config_parse(spa
, &rvd
, nvtop
, NULL
, 0,
3851 VDEV_ALLOC_ROOTPOOL
);
3852 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3854 mutex_exit(&spa_namespace_lock
);
3855 nvlist_free(config
);
3856 cmn_err(CE_NOTE
, "Can not parse the config for pool '%s'",
3862 * Get the boot vdev.
3864 if ((bvd
= vdev_lookup_by_guid(rvd
, guid
)) == NULL
) {
3865 cmn_err(CE_NOTE
, "Can not find the boot vdev for guid %llu",
3866 (u_longlong_t
)guid
);
3867 error
= SET_ERROR(ENOENT
);
3872 * Determine if there is a better boot device.
3875 spa_alt_rootvdev(rvd
, &avd
, &txg
);
3877 cmn_err(CE_NOTE
, "The boot device is 'degraded'. Please "
3878 "try booting from '%s'", avd
->vdev_path
);
3879 error
= SET_ERROR(EINVAL
);
3884 * If the boot device is part of a spare vdev then ensure that
3885 * we're booting off the active spare.
3887 if (bvd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
3888 !bvd
->vdev_isspare
) {
3889 cmn_err(CE_NOTE
, "The boot device is currently spared. Please "
3890 "try booting from '%s'",
3892 vdev_child
[bvd
->vdev_parent
->vdev_children
- 1]->vdev_path
);
3893 error
= SET_ERROR(EINVAL
);
3899 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3901 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3902 mutex_exit(&spa_namespace_lock
);
3904 nvlist_free(config
);
3911 * Import a non-root pool into the system.
3914 spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
, uint64_t flags
)
3917 char *altroot
= NULL
;
3918 spa_load_state_t state
= SPA_LOAD_IMPORT
;
3919 zpool_rewind_policy_t policy
;
3920 uint64_t mode
= spa_mode_global
;
3921 uint64_t readonly
= B_FALSE
;
3924 nvlist_t
**spares
, **l2cache
;
3925 uint_t nspares
, nl2cache
;
3928 * If a pool with this name exists, return failure.
3930 mutex_enter(&spa_namespace_lock
);
3931 if (spa_lookup(pool
) != NULL
) {
3932 mutex_exit(&spa_namespace_lock
);
3933 return (SET_ERROR(EEXIST
));
3937 * Create and initialize the spa structure.
3939 (void) nvlist_lookup_string(props
,
3940 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3941 (void) nvlist_lookup_uint64(props
,
3942 zpool_prop_to_name(ZPOOL_PROP_READONLY
), &readonly
);
3945 spa
= spa_add(pool
, config
, altroot
);
3946 spa
->spa_import_flags
= flags
;
3949 * Verbatim import - Take a pool and insert it into the namespace
3950 * as if it had been loaded at boot.
3952 if (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) {
3954 spa_configfile_set(spa
, props
, B_FALSE
);
3956 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3958 mutex_exit(&spa_namespace_lock
);
3962 spa_activate(spa
, mode
);
3965 * Don't start async tasks until we know everything is healthy.
3967 spa_async_suspend(spa
);
3969 zpool_get_rewind_policy(config
, &policy
);
3970 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
3971 state
= SPA_LOAD_RECOVER
;
3974 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
3975 * because the user-supplied config is actually the one to trust when
3978 if (state
!= SPA_LOAD_RECOVER
)
3979 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
3981 error
= spa_load_best(spa
, state
, B_TRUE
, policy
.zrp_txg
,
3982 policy
.zrp_request
);
3985 * Propagate anything learned while loading the pool and pass it
3986 * back to caller (i.e. rewind info, missing devices, etc).
3988 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
3989 spa
->spa_load_info
) == 0);
3991 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3993 * Toss any existing sparelist, as it doesn't have any validity
3994 * anymore, and conflicts with spa_has_spare().
3996 if (spa
->spa_spares
.sav_config
) {
3997 nvlist_free(spa
->spa_spares
.sav_config
);
3998 spa
->spa_spares
.sav_config
= NULL
;
3999 spa_load_spares(spa
);
4001 if (spa
->spa_l2cache
.sav_config
) {
4002 nvlist_free(spa
->spa_l2cache
.sav_config
);
4003 spa
->spa_l2cache
.sav_config
= NULL
;
4004 spa_load_l2cache(spa
);
4007 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
4010 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
4013 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
4014 VDEV_ALLOC_L2CACHE
);
4015 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4018 spa_configfile_set(spa
, props
, B_FALSE
);
4020 if (error
!= 0 || (props
&& spa_writeable(spa
) &&
4021 (error
= spa_prop_set(spa
, props
)))) {
4023 spa_deactivate(spa
);
4025 mutex_exit(&spa_namespace_lock
);
4029 spa_async_resume(spa
);
4032 * Override any spares and level 2 cache devices as specified by
4033 * the user, as these may have correct device names/devids, etc.
4035 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
4036 &spares
, &nspares
) == 0) {
4037 if (spa
->spa_spares
.sav_config
)
4038 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
,
4039 ZPOOL_CONFIG_SPARES
, DATA_TYPE_NVLIST_ARRAY
) == 0);
4041 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
,
4042 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4043 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
4044 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
4045 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4046 spa_load_spares(spa
);
4047 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4048 spa
->spa_spares
.sav_sync
= B_TRUE
;
4050 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
4051 &l2cache
, &nl2cache
) == 0) {
4052 if (spa
->spa_l2cache
.sav_config
)
4053 VERIFY(nvlist_remove(spa
->spa_l2cache
.sav_config
,
4054 ZPOOL_CONFIG_L2CACHE
, DATA_TYPE_NVLIST_ARRAY
) == 0);
4056 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
4057 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4058 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
4059 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
4060 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4061 spa_load_l2cache(spa
);
4062 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4063 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4067 * Check for any removed devices.
4069 if (spa
->spa_autoreplace
) {
4070 spa_aux_check_removed(&spa
->spa_spares
);
4071 spa_aux_check_removed(&spa
->spa_l2cache
);
4074 if (spa_writeable(spa
)) {
4076 * Update the config cache to include the newly-imported pool.
4078 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
4082 * It's possible that the pool was expanded while it was exported.
4083 * We kick off an async task to handle this for us.
4085 spa_async_request(spa
, SPA_ASYNC_AUTOEXPAND
);
4087 mutex_exit(&spa_namespace_lock
);
4088 spa_history_log_version(spa
, "import");
4094 spa_tryimport(nvlist_t
*tryconfig
)
4096 nvlist_t
*config
= NULL
;
4102 if (nvlist_lookup_string(tryconfig
, ZPOOL_CONFIG_POOL_NAME
, &poolname
))
4105 if (nvlist_lookup_uint64(tryconfig
, ZPOOL_CONFIG_POOL_STATE
, &state
))
4109 * Create and initialize the spa structure.
4111 mutex_enter(&spa_namespace_lock
);
4112 spa
= spa_add(TRYIMPORT_NAME
, tryconfig
, NULL
);
4113 spa_activate(spa
, FREAD
);
4116 * Pass off the heavy lifting to spa_load().
4117 * Pass TRUE for mosconfig because the user-supplied config
4118 * is actually the one to trust when doing an import.
4120 error
= spa_load(spa
, SPA_LOAD_TRYIMPORT
, SPA_IMPORT_EXISTING
, B_TRUE
);
4123 * If 'tryconfig' was at least parsable, return the current config.
4125 if (spa
->spa_root_vdev
!= NULL
) {
4126 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
4127 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
,
4129 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
4131 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_TIMESTAMP
,
4132 spa
->spa_uberblock
.ub_timestamp
) == 0);
4133 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
4134 spa
->spa_load_info
) == 0);
4137 * If the bootfs property exists on this pool then we
4138 * copy it out so that external consumers can tell which
4139 * pools are bootable.
4141 if ((!error
|| error
== EEXIST
) && spa
->spa_bootfs
) {
4142 char *tmpname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
4145 * We have to play games with the name since the
4146 * pool was opened as TRYIMPORT_NAME.
4148 if (dsl_dsobj_to_dsname(spa_name(spa
),
4149 spa
->spa_bootfs
, tmpname
) == 0) {
4151 char *dsname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
4153 cp
= strchr(tmpname
, '/');
4155 (void) strlcpy(dsname
, tmpname
,
4158 (void) snprintf(dsname
, MAXPATHLEN
,
4159 "%s/%s", poolname
, ++cp
);
4161 VERIFY(nvlist_add_string(config
,
4162 ZPOOL_CONFIG_BOOTFS
, dsname
) == 0);
4163 kmem_free(dsname
, MAXPATHLEN
);
4165 kmem_free(tmpname
, MAXPATHLEN
);
4169 * Add the list of hot spares and level 2 cache devices.
4171 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
4172 spa_add_spares(spa
, config
);
4173 spa_add_l2cache(spa
, config
);
4174 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
4178 spa_deactivate(spa
);
4180 mutex_exit(&spa_namespace_lock
);
4186 * Pool export/destroy
4188 * The act of destroying or exporting a pool is very simple. We make sure there
4189 * is no more pending I/O and any references to the pool are gone. Then, we
4190 * update the pool state and sync all the labels to disk, removing the
4191 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
4192 * we don't sync the labels or remove the configuration cache.
4195 spa_export_common(char *pool
, int new_state
, nvlist_t
**oldconfig
,
4196 boolean_t force
, boolean_t hardforce
)
4203 if (!(spa_mode_global
& FWRITE
))
4204 return (SET_ERROR(EROFS
));
4206 mutex_enter(&spa_namespace_lock
);
4207 if ((spa
= spa_lookup(pool
)) == NULL
) {
4208 mutex_exit(&spa_namespace_lock
);
4209 return (SET_ERROR(ENOENT
));
4213 * Put a hold on the pool, drop the namespace lock, stop async tasks,
4214 * reacquire the namespace lock, and see if we can export.
4216 spa_open_ref(spa
, FTAG
);
4217 mutex_exit(&spa_namespace_lock
);
4218 spa_async_suspend(spa
);
4219 mutex_enter(&spa_namespace_lock
);
4220 spa_close(spa
, FTAG
);
4223 * The pool will be in core if it's openable,
4224 * in which case we can modify its state.
4226 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
&& spa
->spa_sync_on
) {
4228 * Objsets may be open only because they're dirty, so we
4229 * have to force it to sync before checking spa_refcnt.
4231 txg_wait_synced(spa
->spa_dsl_pool
, 0);
4232 spa_evicting_os_wait(spa
);
4235 * A pool cannot be exported or destroyed if there are active
4236 * references. If we are resetting a pool, allow references by
4237 * fault injection handlers.
4239 if (!spa_refcount_zero(spa
) ||
4240 (spa
->spa_inject_ref
!= 0 &&
4241 new_state
!= POOL_STATE_UNINITIALIZED
)) {
4242 spa_async_resume(spa
);
4243 mutex_exit(&spa_namespace_lock
);
4244 return (SET_ERROR(EBUSY
));
4248 * A pool cannot be exported if it has an active shared spare.
4249 * This is to prevent other pools stealing the active spare
4250 * from an exported pool. At user's own will, such pool can
4251 * be forcedly exported.
4253 if (!force
&& new_state
== POOL_STATE_EXPORTED
&&
4254 spa_has_active_shared_spare(spa
)) {
4255 spa_async_resume(spa
);
4256 mutex_exit(&spa_namespace_lock
);
4257 return (SET_ERROR(EXDEV
));
4261 * We want this to be reflected on every label,
4262 * so mark them all dirty. spa_unload() will do the
4263 * final sync that pushes these changes out.
4265 if (new_state
!= POOL_STATE_UNINITIALIZED
&& !hardforce
) {
4266 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4267 spa
->spa_state
= new_state
;
4268 spa
->spa_final_txg
= spa_last_synced_txg(spa
) +
4270 vdev_config_dirty(spa
->spa_root_vdev
);
4271 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4275 spa_event_notify(spa
, NULL
, ESC_ZFS_POOL_DESTROY
);
4277 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
4279 spa_deactivate(spa
);
4282 if (oldconfig
&& spa
->spa_config
)
4283 VERIFY(nvlist_dup(spa
->spa_config
, oldconfig
, 0) == 0);
4285 if (new_state
!= POOL_STATE_UNINITIALIZED
) {
4287 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
4290 mutex_exit(&spa_namespace_lock
);
4296 * Destroy a storage pool.
4299 spa_destroy(char *pool
)
4301 return (spa_export_common(pool
, POOL_STATE_DESTROYED
, NULL
,
4306 * Export a storage pool.
4309 spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
4310 boolean_t hardforce
)
4312 return (spa_export_common(pool
, POOL_STATE_EXPORTED
, oldconfig
,
4317 * Similar to spa_export(), this unloads the spa_t without actually removing it
4318 * from the namespace in any way.
4321 spa_reset(char *pool
)
4323 return (spa_export_common(pool
, POOL_STATE_UNINITIALIZED
, NULL
,
4328 * ==========================================================================
4329 * Device manipulation
4330 * ==========================================================================
4334 * Add a device to a storage pool.
4337 spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
)
4341 vdev_t
*rvd
= spa
->spa_root_vdev
;
4343 nvlist_t
**spares
, **l2cache
;
4344 uint_t nspares
, nl2cache
;
4346 ASSERT(spa_writeable(spa
));
4348 txg
= spa_vdev_enter(spa
);
4350 if ((error
= spa_config_parse(spa
, &vd
, nvroot
, NULL
, 0,
4351 VDEV_ALLOC_ADD
)) != 0)
4352 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4354 spa
->spa_pending_vdev
= vd
; /* spa_vdev_exit() will clear this */
4356 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
, &spares
,
4360 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
, &l2cache
,
4364 if (vd
->vdev_children
== 0 && nspares
== 0 && nl2cache
== 0)
4365 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
4367 if (vd
->vdev_children
!= 0 &&
4368 (error
= vdev_create(vd
, txg
, B_FALSE
)) != 0)
4369 return (spa_vdev_exit(spa
, vd
, txg
, error
));
4372 * We must validate the spares and l2cache devices after checking the
4373 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
4375 if ((error
= spa_validate_aux(spa
, nvroot
, txg
, VDEV_ALLOC_ADD
)) != 0)
4376 return (spa_vdev_exit(spa
, vd
, txg
, error
));
4379 * Transfer each new top-level vdev from vd to rvd.
4381 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
4384 * Set the vdev id to the first hole, if one exists.
4386 for (id
= 0; id
< rvd
->vdev_children
; id
++) {
4387 if (rvd
->vdev_child
[id
]->vdev_ishole
) {
4388 vdev_free(rvd
->vdev_child
[id
]);
4392 tvd
= vd
->vdev_child
[c
];
4393 vdev_remove_child(vd
, tvd
);
4395 vdev_add_child(rvd
, tvd
);
4396 vdev_config_dirty(tvd
);
4400 spa_set_aux_vdevs(&spa
->spa_spares
, spares
, nspares
,
4401 ZPOOL_CONFIG_SPARES
);
4402 spa_load_spares(spa
);
4403 spa
->spa_spares
.sav_sync
= B_TRUE
;
4406 if (nl2cache
!= 0) {
4407 spa_set_aux_vdevs(&spa
->spa_l2cache
, l2cache
, nl2cache
,
4408 ZPOOL_CONFIG_L2CACHE
);
4409 spa_load_l2cache(spa
);
4410 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4414 * We have to be careful when adding new vdevs to an existing pool.
4415 * If other threads start allocating from these vdevs before we
4416 * sync the config cache, and we lose power, then upon reboot we may
4417 * fail to open the pool because there are DVAs that the config cache
4418 * can't translate. Therefore, we first add the vdevs without
4419 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
4420 * and then let spa_config_update() initialize the new metaslabs.
4422 * spa_load() checks for added-but-not-initialized vdevs, so that
4423 * if we lose power at any point in this sequence, the remaining
4424 * steps will be completed the next time we load the pool.
4426 (void) spa_vdev_exit(spa
, vd
, txg
, 0);
4428 mutex_enter(&spa_namespace_lock
);
4429 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
4430 mutex_exit(&spa_namespace_lock
);
4436 * Attach a device to a mirror. The arguments are the path to any device
4437 * in the mirror, and the nvroot for the new device. If the path specifies
4438 * a device that is not mirrored, we automatically insert the mirror vdev.
4440 * If 'replacing' is specified, the new device is intended to replace the
4441 * existing device; in this case the two devices are made into their own
4442 * mirror using the 'replacing' vdev, which is functionally identical to
4443 * the mirror vdev (it actually reuses all the same ops) but has a few
4444 * extra rules: you can't attach to it after it's been created, and upon
4445 * completion of resilvering, the first disk (the one being replaced)
4446 * is automatically detached.
4449 spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
, int replacing
)
4451 uint64_t txg
, dtl_max_txg
;
4452 vdev_t
*rvd
= spa
->spa_root_vdev
;
4453 vdev_t
*oldvd
, *newvd
, *newrootvd
, *pvd
, *tvd
;
4455 char *oldvdpath
, *newvdpath
;
4459 ASSERT(spa_writeable(spa
));
4461 txg
= spa_vdev_enter(spa
);
4463 oldvd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4466 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4468 if (!oldvd
->vdev_ops
->vdev_op_leaf
)
4469 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4471 pvd
= oldvd
->vdev_parent
;
4473 if ((error
= spa_config_parse(spa
, &newrootvd
, nvroot
, NULL
, 0,
4474 VDEV_ALLOC_ATTACH
)) != 0)
4475 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4477 if (newrootvd
->vdev_children
!= 1)
4478 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
4480 newvd
= newrootvd
->vdev_child
[0];
4482 if (!newvd
->vdev_ops
->vdev_op_leaf
)
4483 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
4485 if ((error
= vdev_create(newrootvd
, txg
, replacing
)) != 0)
4486 return (spa_vdev_exit(spa
, newrootvd
, txg
, error
));
4489 * Spares can't replace logs
4491 if (oldvd
->vdev_top
->vdev_islog
&& newvd
->vdev_isspare
)
4492 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4496 * For attach, the only allowable parent is a mirror or the root
4499 if (pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4500 pvd
->vdev_ops
!= &vdev_root_ops
)
4501 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4503 pvops
= &vdev_mirror_ops
;
4506 * Active hot spares can only be replaced by inactive hot
4509 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4510 oldvd
->vdev_isspare
&&
4511 !spa_has_spare(spa
, newvd
->vdev_guid
))
4512 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4515 * If the source is a hot spare, and the parent isn't already a
4516 * spare, then we want to create a new hot spare. Otherwise, we
4517 * want to create a replacing vdev. The user is not allowed to
4518 * attach to a spared vdev child unless the 'isspare' state is
4519 * the same (spare replaces spare, non-spare replaces
4522 if (pvd
->vdev_ops
== &vdev_replacing_ops
&&
4523 spa_version(spa
) < SPA_VERSION_MULTI_REPLACE
) {
4524 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4525 } else if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4526 newvd
->vdev_isspare
!= oldvd
->vdev_isspare
) {
4527 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4530 if (newvd
->vdev_isspare
)
4531 pvops
= &vdev_spare_ops
;
4533 pvops
= &vdev_replacing_ops
;
4537 * Make sure the new device is big enough.
4539 if (newvd
->vdev_asize
< vdev_get_min_asize(oldvd
))
4540 return (spa_vdev_exit(spa
, newrootvd
, txg
, EOVERFLOW
));
4543 * The new device cannot have a higher alignment requirement
4544 * than the top-level vdev.
4546 if (newvd
->vdev_ashift
> oldvd
->vdev_top
->vdev_ashift
)
4547 return (spa_vdev_exit(spa
, newrootvd
, txg
, EDOM
));
4550 * If this is an in-place replacement, update oldvd's path and devid
4551 * to make it distinguishable from newvd, and unopenable from now on.
4553 if (strcmp(oldvd
->vdev_path
, newvd
->vdev_path
) == 0) {
4554 spa_strfree(oldvd
->vdev_path
);
4555 oldvd
->vdev_path
= kmem_alloc(strlen(newvd
->vdev_path
) + 5,
4557 (void) sprintf(oldvd
->vdev_path
, "%s/%s",
4558 newvd
->vdev_path
, "old");
4559 if (oldvd
->vdev_devid
!= NULL
) {
4560 spa_strfree(oldvd
->vdev_devid
);
4561 oldvd
->vdev_devid
= NULL
;
4565 /* mark the device being resilvered */
4566 newvd
->vdev_resilver_txg
= txg
;
4569 * If the parent is not a mirror, or if we're replacing, insert the new
4570 * mirror/replacing/spare vdev above oldvd.
4572 if (pvd
->vdev_ops
!= pvops
)
4573 pvd
= vdev_add_parent(oldvd
, pvops
);
4575 ASSERT(pvd
->vdev_top
->vdev_parent
== rvd
);
4576 ASSERT(pvd
->vdev_ops
== pvops
);
4577 ASSERT(oldvd
->vdev_parent
== pvd
);
4580 * Extract the new device from its root and add it to pvd.
4582 vdev_remove_child(newrootvd
, newvd
);
4583 newvd
->vdev_id
= pvd
->vdev_children
;
4584 newvd
->vdev_crtxg
= oldvd
->vdev_crtxg
;
4585 vdev_add_child(pvd
, newvd
);
4587 tvd
= newvd
->vdev_top
;
4588 ASSERT(pvd
->vdev_top
== tvd
);
4589 ASSERT(tvd
->vdev_parent
== rvd
);
4591 vdev_config_dirty(tvd
);
4594 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
4595 * for any dmu_sync-ed blocks. It will propagate upward when
4596 * spa_vdev_exit() calls vdev_dtl_reassess().
4598 dtl_max_txg
= txg
+ TXG_CONCURRENT_STATES
;
4600 vdev_dtl_dirty(newvd
, DTL_MISSING
, TXG_INITIAL
,
4601 dtl_max_txg
- TXG_INITIAL
);
4603 if (newvd
->vdev_isspare
) {
4604 spa_spare_activate(newvd
);
4605 spa_event_notify(spa
, newvd
, ESC_ZFS_VDEV_SPARE
);
4608 oldvdpath
= spa_strdup(oldvd
->vdev_path
);
4609 newvdpath
= spa_strdup(newvd
->vdev_path
);
4610 newvd_isspare
= newvd
->vdev_isspare
;
4613 * Mark newvd's DTL dirty in this txg.
4615 vdev_dirty(tvd
, VDD_DTL
, newvd
, txg
);
4618 * Schedule the resilver to restart in the future. We do this to
4619 * ensure that dmu_sync-ed blocks have been stitched into the
4620 * respective datasets.
4622 dsl_resilver_restart(spa
->spa_dsl_pool
, dtl_max_txg
);
4627 (void) spa_vdev_exit(spa
, newrootvd
, dtl_max_txg
, 0);
4629 spa_history_log_internal(spa
, "vdev attach", NULL
,
4630 "%s vdev=%s %s vdev=%s",
4631 replacing
&& newvd_isspare
? "spare in" :
4632 replacing
? "replace" : "attach", newvdpath
,
4633 replacing
? "for" : "to", oldvdpath
);
4635 spa_strfree(oldvdpath
);
4636 spa_strfree(newvdpath
);
4638 if (spa
->spa_bootfs
)
4639 spa_event_notify(spa
, newvd
, ESC_ZFS_BOOTFS_VDEV_ATTACH
);
4645 * Detach a device from a mirror or replacing vdev.
4647 * If 'replace_done' is specified, only detach if the parent
4648 * is a replacing vdev.
4651 spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
, int replace_done
)
4655 vdev_t
*rvd
= spa
->spa_root_vdev
;
4656 vdev_t
*vd
, *pvd
, *cvd
, *tvd
;
4657 boolean_t unspare
= B_FALSE
;
4658 uint64_t unspare_guid
= 0;
4661 ASSERT(spa_writeable(spa
));
4663 txg
= spa_vdev_enter(spa
);
4665 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4668 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4670 if (!vd
->vdev_ops
->vdev_op_leaf
)
4671 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4673 pvd
= vd
->vdev_parent
;
4676 * If the parent/child relationship is not as expected, don't do it.
4677 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4678 * vdev that's replacing B with C. The user's intent in replacing
4679 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4680 * the replace by detaching C, the expected behavior is to end up
4681 * M(A,B). But suppose that right after deciding to detach C,
4682 * the replacement of B completes. We would have M(A,C), and then
4683 * ask to detach C, which would leave us with just A -- not what
4684 * the user wanted. To prevent this, we make sure that the
4685 * parent/child relationship hasn't changed -- in this example,
4686 * that C's parent is still the replacing vdev R.
4688 if (pvd
->vdev_guid
!= pguid
&& pguid
!= 0)
4689 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4692 * Only 'replacing' or 'spare' vdevs can be replaced.
4694 if (replace_done
&& pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4695 pvd
->vdev_ops
!= &vdev_spare_ops
)
4696 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4698 ASSERT(pvd
->vdev_ops
!= &vdev_spare_ops
||
4699 spa_version(spa
) >= SPA_VERSION_SPARES
);
4702 * Only mirror, replacing, and spare vdevs support detach.
4704 if (pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4705 pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4706 pvd
->vdev_ops
!= &vdev_spare_ops
)
4707 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4710 * If this device has the only valid copy of some data,
4711 * we cannot safely detach it.
4713 if (vdev_dtl_required(vd
))
4714 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4716 ASSERT(pvd
->vdev_children
>= 2);
4719 * If we are detaching the second disk from a replacing vdev, then
4720 * check to see if we changed the original vdev's path to have "/old"
4721 * at the end in spa_vdev_attach(). If so, undo that change now.
4723 if (pvd
->vdev_ops
== &vdev_replacing_ops
&& vd
->vdev_id
> 0 &&
4724 vd
->vdev_path
!= NULL
) {
4725 size_t len
= strlen(vd
->vdev_path
);
4727 for (int c
= 0; c
< pvd
->vdev_children
; c
++) {
4728 cvd
= pvd
->vdev_child
[c
];
4730 if (cvd
== vd
|| cvd
->vdev_path
== NULL
)
4733 if (strncmp(cvd
->vdev_path
, vd
->vdev_path
, len
) == 0 &&
4734 strcmp(cvd
->vdev_path
+ len
, "/old") == 0) {
4735 spa_strfree(cvd
->vdev_path
);
4736 cvd
->vdev_path
= spa_strdup(vd
->vdev_path
);
4743 * If we are detaching the original disk from a spare, then it implies
4744 * that the spare should become a real disk, and be removed from the
4745 * active spare list for the pool.
4747 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4749 pvd
->vdev_child
[pvd
->vdev_children
- 1]->vdev_isspare
)
4753 * Erase the disk labels so the disk can be used for other things.
4754 * This must be done after all other error cases are handled,
4755 * but before we disembowel vd (so we can still do I/O to it).
4756 * But if we can't do it, don't treat the error as fatal --
4757 * it may be that the unwritability of the disk is the reason
4758 * it's being detached!
4760 error
= vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4763 * Remove vd from its parent and compact the parent's children.
4765 vdev_remove_child(pvd
, vd
);
4766 vdev_compact_children(pvd
);
4769 * Remember one of the remaining children so we can get tvd below.
4771 cvd
= pvd
->vdev_child
[pvd
->vdev_children
- 1];
4774 * If we need to remove the remaining child from the list of hot spares,
4775 * do it now, marking the vdev as no longer a spare in the process.
4776 * We must do this before vdev_remove_parent(), because that can
4777 * change the GUID if it creates a new toplevel GUID. For a similar
4778 * reason, we must remove the spare now, in the same txg as the detach;
4779 * otherwise someone could attach a new sibling, change the GUID, and
4780 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
4783 ASSERT(cvd
->vdev_isspare
);
4784 spa_spare_remove(cvd
);
4785 unspare_guid
= cvd
->vdev_guid
;
4786 (void) spa_vdev_remove(spa
, unspare_guid
, B_TRUE
);
4787 cvd
->vdev_unspare
= B_TRUE
;
4791 * If the parent mirror/replacing vdev only has one child,
4792 * the parent is no longer needed. Remove it from the tree.
4794 if (pvd
->vdev_children
== 1) {
4795 if (pvd
->vdev_ops
== &vdev_spare_ops
)
4796 cvd
->vdev_unspare
= B_FALSE
;
4797 vdev_remove_parent(cvd
);
4802 * We don't set tvd until now because the parent we just removed
4803 * may have been the previous top-level vdev.
4805 tvd
= cvd
->vdev_top
;
4806 ASSERT(tvd
->vdev_parent
== rvd
);
4809 * Reevaluate the parent vdev state.
4811 vdev_propagate_state(cvd
);
4814 * If the 'autoexpand' property is set on the pool then automatically
4815 * try to expand the size of the pool. For example if the device we
4816 * just detached was smaller than the others, it may be possible to
4817 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
4818 * first so that we can obtain the updated sizes of the leaf vdevs.
4820 if (spa
->spa_autoexpand
) {
4822 vdev_expand(tvd
, txg
);
4825 vdev_config_dirty(tvd
);
4828 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
4829 * vd->vdev_detached is set and free vd's DTL object in syncing context.
4830 * But first make sure we're not on any *other* txg's DTL list, to
4831 * prevent vd from being accessed after it's freed.
4833 vdpath
= spa_strdup(vd
->vdev_path
);
4834 for (int t
= 0; t
< TXG_SIZE
; t
++)
4835 (void) txg_list_remove_this(&tvd
->vdev_dtl_list
, vd
, t
);
4836 vd
->vdev_detached
= B_TRUE
;
4837 vdev_dirty(tvd
, VDD_DTL
, vd
, txg
);
4839 spa_event_notify(spa
, vd
, ESC_ZFS_VDEV_REMOVE
);
4841 /* hang on to the spa before we release the lock */
4842 spa_open_ref(spa
, FTAG
);
4844 error
= spa_vdev_exit(spa
, vd
, txg
, 0);
4846 spa_history_log_internal(spa
, "detach", NULL
,
4848 spa_strfree(vdpath
);
4851 * If this was the removal of the original device in a hot spare vdev,
4852 * then we want to go through and remove the device from the hot spare
4853 * list of every other pool.
4856 spa_t
*altspa
= NULL
;
4858 mutex_enter(&spa_namespace_lock
);
4859 while ((altspa
= spa_next(altspa
)) != NULL
) {
4860 if (altspa
->spa_state
!= POOL_STATE_ACTIVE
||
4864 spa_open_ref(altspa
, FTAG
);
4865 mutex_exit(&spa_namespace_lock
);
4866 (void) spa_vdev_remove(altspa
, unspare_guid
, B_TRUE
);
4867 mutex_enter(&spa_namespace_lock
);
4868 spa_close(altspa
, FTAG
);
4870 mutex_exit(&spa_namespace_lock
);
4872 /* search the rest of the vdevs for spares to remove */
4873 spa_vdev_resilver_done(spa
);
4876 /* all done with the spa; OK to release */
4877 mutex_enter(&spa_namespace_lock
);
4878 spa_close(spa
, FTAG
);
4879 mutex_exit(&spa_namespace_lock
);
4885 * Split a set of devices from their mirrors, and create a new pool from them.
4888 spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
4889 nvlist_t
*props
, boolean_t exp
)
4892 uint64_t txg
, *glist
;
4894 uint_t c
, children
, lastlog
;
4895 nvlist_t
**child
, *nvl
, *tmp
;
4897 char *altroot
= NULL
;
4898 vdev_t
*rvd
, **vml
= NULL
; /* vdev modify list */
4899 boolean_t activate_slog
;
4901 ASSERT(spa_writeable(spa
));
4903 txg
= spa_vdev_enter(spa
);
4905 /* clear the log and flush everything up to now */
4906 activate_slog
= spa_passivate_log(spa
);
4907 (void) spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
4908 error
= spa_offline_log(spa
);
4909 txg
= spa_vdev_config_enter(spa
);
4912 spa_activate_log(spa
);
4915 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4917 /* check new spa name before going any further */
4918 if (spa_lookup(newname
) != NULL
)
4919 return (spa_vdev_exit(spa
, NULL
, txg
, EEXIST
));
4922 * scan through all the children to ensure they're all mirrors
4924 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
) != 0 ||
4925 nvlist_lookup_nvlist_array(nvl
, ZPOOL_CONFIG_CHILDREN
, &child
,
4927 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4929 /* first, check to ensure we've got the right child count */
4930 rvd
= spa
->spa_root_vdev
;
4932 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
4933 vdev_t
*vd
= rvd
->vdev_child
[c
];
4935 /* don't count the holes & logs as children */
4936 if (vd
->vdev_islog
|| vd
->vdev_ishole
) {
4944 if (children
!= (lastlog
!= 0 ? lastlog
: rvd
->vdev_children
))
4945 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4947 /* next, ensure no spare or cache devices are part of the split */
4948 if (nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_SPARES
, &tmp
) == 0 ||
4949 nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_L2CACHE
, &tmp
) == 0)
4950 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4952 vml
= kmem_zalloc(children
* sizeof (vdev_t
*), KM_SLEEP
);
4953 glist
= kmem_zalloc(children
* sizeof (uint64_t), KM_SLEEP
);
4955 /* then, loop over each vdev and validate it */
4956 for (c
= 0; c
< children
; c
++) {
4957 uint64_t is_hole
= 0;
4959 (void) nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_IS_HOLE
,
4963 if (spa
->spa_root_vdev
->vdev_child
[c
]->vdev_ishole
||
4964 spa
->spa_root_vdev
->vdev_child
[c
]->vdev_islog
) {
4967 error
= SET_ERROR(EINVAL
);
4972 /* which disk is going to be split? */
4973 if (nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_GUID
,
4975 error
= SET_ERROR(EINVAL
);
4979 /* look it up in the spa */
4980 vml
[c
] = spa_lookup_by_guid(spa
, glist
[c
], B_FALSE
);
4981 if (vml
[c
] == NULL
) {
4982 error
= SET_ERROR(ENODEV
);
4986 /* make sure there's nothing stopping the split */
4987 if (vml
[c
]->vdev_parent
->vdev_ops
!= &vdev_mirror_ops
||
4988 vml
[c
]->vdev_islog
||
4989 vml
[c
]->vdev_ishole
||
4990 vml
[c
]->vdev_isspare
||
4991 vml
[c
]->vdev_isl2cache
||
4992 !vdev_writeable(vml
[c
]) ||
4993 vml
[c
]->vdev_children
!= 0 ||
4994 vml
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
||
4995 c
!= spa
->spa_root_vdev
->vdev_child
[c
]->vdev_id
) {
4996 error
= SET_ERROR(EINVAL
);
5000 if (vdev_dtl_required(vml
[c
])) {
5001 error
= SET_ERROR(EBUSY
);
5005 /* we need certain info from the top level */
5006 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_ARRAY
,
5007 vml
[c
]->vdev_top
->vdev_ms_array
) == 0);
5008 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_SHIFT
,
5009 vml
[c
]->vdev_top
->vdev_ms_shift
) == 0);
5010 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASIZE
,
5011 vml
[c
]->vdev_top
->vdev_asize
) == 0);
5012 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASHIFT
,
5013 vml
[c
]->vdev_top
->vdev_ashift
) == 0);
5017 kmem_free(vml
, children
* sizeof (vdev_t
*));
5018 kmem_free(glist
, children
* sizeof (uint64_t));
5019 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5022 /* stop writers from using the disks */
5023 for (c
= 0; c
< children
; c
++) {
5025 vml
[c
]->vdev_offline
= B_TRUE
;
5027 vdev_reopen(spa
->spa_root_vdev
);
5030 * Temporarily record the splitting vdevs in the spa config. This
5031 * will disappear once the config is regenerated.
5033 VERIFY(nvlist_alloc(&nvl
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5034 VERIFY(nvlist_add_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
5035 glist
, children
) == 0);
5036 kmem_free(glist
, children
* sizeof (uint64_t));
5038 mutex_enter(&spa
->spa_props_lock
);
5039 VERIFY(nvlist_add_nvlist(spa
->spa_config
, ZPOOL_CONFIG_SPLIT
,
5041 mutex_exit(&spa
->spa_props_lock
);
5042 spa
->spa_config_splitting
= nvl
;
5043 vdev_config_dirty(spa
->spa_root_vdev
);
5045 /* configure and create the new pool */
5046 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
, newname
) == 0);
5047 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
5048 exp
? POOL_STATE_EXPORTED
: POOL_STATE_ACTIVE
) == 0);
5049 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
5050 spa_version(spa
)) == 0);
5051 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
5052 spa
->spa_config_txg
) == 0);
5053 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
5054 spa_generate_guid(NULL
)) == 0);
5055 (void) nvlist_lookup_string(props
,
5056 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
5058 /* add the new pool to the namespace */
5059 newspa
= spa_add(newname
, config
, altroot
);
5060 newspa
->spa_config_txg
= spa
->spa_config_txg
;
5061 spa_set_log_state(newspa
, SPA_LOG_CLEAR
);
5063 /* release the spa config lock, retaining the namespace lock */
5064 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
5066 if (zio_injection_enabled
)
5067 zio_handle_panic_injection(spa
, FTAG
, 1);
5069 spa_activate(newspa
, spa_mode_global
);
5070 spa_async_suspend(newspa
);
5072 /* create the new pool from the disks of the original pool */
5073 error
= spa_load(newspa
, SPA_LOAD_IMPORT
, SPA_IMPORT_ASSEMBLE
, B_TRUE
);
5077 /* if that worked, generate a real config for the new pool */
5078 if (newspa
->spa_root_vdev
!= NULL
) {
5079 VERIFY(nvlist_alloc(&newspa
->spa_config_splitting
,
5080 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5081 VERIFY(nvlist_add_uint64(newspa
->spa_config_splitting
,
5082 ZPOOL_CONFIG_SPLIT_GUID
, spa_guid(spa
)) == 0);
5083 spa_config_set(newspa
, spa_config_generate(newspa
, NULL
, -1ULL,
5088 if (props
!= NULL
) {
5089 spa_configfile_set(newspa
, props
, B_FALSE
);
5090 error
= spa_prop_set(newspa
, props
);
5095 /* flush everything */
5096 txg
= spa_vdev_config_enter(newspa
);
5097 vdev_config_dirty(newspa
->spa_root_vdev
);
5098 (void) spa_vdev_config_exit(newspa
, NULL
, txg
, 0, FTAG
);
5100 if (zio_injection_enabled
)
5101 zio_handle_panic_injection(spa
, FTAG
, 2);
5103 spa_async_resume(newspa
);
5105 /* finally, update the original pool's config */
5106 txg
= spa_vdev_config_enter(spa
);
5107 tx
= dmu_tx_create_dd(spa_get_dsl(spa
)->dp_mos_dir
);
5108 error
= dmu_tx_assign(tx
, TXG_WAIT
);
5111 for (c
= 0; c
< children
; c
++) {
5112 if (vml
[c
] != NULL
) {
5115 spa_history_log_internal(spa
, "detach", tx
,
5116 "vdev=%s", vml
[c
]->vdev_path
);
5120 vdev_config_dirty(spa
->spa_root_vdev
);
5121 spa
->spa_config_splitting
= NULL
;
5125 (void) spa_vdev_exit(spa
, NULL
, txg
, 0);
5127 if (zio_injection_enabled
)
5128 zio_handle_panic_injection(spa
, FTAG
, 3);
5130 /* split is complete; log a history record */
5131 spa_history_log_internal(newspa
, "split", NULL
,
5132 "from pool %s", spa_name(spa
));
5134 kmem_free(vml
, children
* sizeof (vdev_t
*));
5136 /* if we're not going to mount the filesystems in userland, export */
5138 error
= spa_export_common(newname
, POOL_STATE_EXPORTED
, NULL
,
5145 spa_deactivate(newspa
);
5148 txg
= spa_vdev_config_enter(spa
);
5150 /* re-online all offlined disks */
5151 for (c
= 0; c
< children
; c
++) {
5153 vml
[c
]->vdev_offline
= B_FALSE
;
5155 vdev_reopen(spa
->spa_root_vdev
);
5157 nvlist_free(spa
->spa_config_splitting
);
5158 spa
->spa_config_splitting
= NULL
;
5159 (void) spa_vdev_exit(spa
, NULL
, txg
, error
);
5161 kmem_free(vml
, children
* sizeof (vdev_t
*));
5166 spa_nvlist_lookup_by_guid(nvlist_t
**nvpp
, int count
, uint64_t target_guid
)
5168 for (int i
= 0; i
< count
; i
++) {
5171 VERIFY(nvlist_lookup_uint64(nvpp
[i
], ZPOOL_CONFIG_GUID
,
5174 if (guid
== target_guid
)
5182 spa_vdev_remove_aux(nvlist_t
*config
, char *name
, nvlist_t
**dev
, int count
,
5183 nvlist_t
*dev_to_remove
)
5185 nvlist_t
**newdev
= NULL
;
5188 newdev
= kmem_alloc((count
- 1) * sizeof (void *), KM_SLEEP
);
5190 for (int i
= 0, j
= 0; i
< count
; i
++) {
5191 if (dev
[i
] == dev_to_remove
)
5193 VERIFY(nvlist_dup(dev
[i
], &newdev
[j
++], KM_SLEEP
) == 0);
5196 VERIFY(nvlist_remove(config
, name
, DATA_TYPE_NVLIST_ARRAY
) == 0);
5197 VERIFY(nvlist_add_nvlist_array(config
, name
, newdev
, count
- 1) == 0);
5199 for (int i
= 0; i
< count
- 1; i
++)
5200 nvlist_free(newdev
[i
]);
5203 kmem_free(newdev
, (count
- 1) * sizeof (void *));
5207 * Evacuate the device.
5210 spa_vdev_remove_evacuate(spa_t
*spa
, vdev_t
*vd
)
5215 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
5216 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5217 ASSERT(vd
== vd
->vdev_top
);
5220 * Evacuate the device. We don't hold the config lock as writer
5221 * since we need to do I/O but we do keep the
5222 * spa_namespace_lock held. Once this completes the device
5223 * should no longer have any blocks allocated on it.
5225 if (vd
->vdev_islog
) {
5226 if (vd
->vdev_stat
.vs_alloc
!= 0)
5227 error
= spa_offline_log(spa
);
5229 error
= SET_ERROR(ENOTSUP
);
5236 * The evacuation succeeded. Remove any remaining MOS metadata
5237 * associated with this vdev, and wait for these changes to sync.
5239 ASSERT0(vd
->vdev_stat
.vs_alloc
);
5240 txg
= spa_vdev_config_enter(spa
);
5241 vd
->vdev_removing
= B_TRUE
;
5242 vdev_dirty_leaves(vd
, VDD_DTL
, txg
);
5243 vdev_config_dirty(vd
);
5244 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
5250 * Complete the removal by cleaning up the namespace.
5253 spa_vdev_remove_from_namespace(spa_t
*spa
, vdev_t
*vd
)
5255 vdev_t
*rvd
= spa
->spa_root_vdev
;
5256 uint64_t id
= vd
->vdev_id
;
5257 boolean_t last_vdev
= (id
== (rvd
->vdev_children
- 1));
5259 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
5260 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
5261 ASSERT(vd
== vd
->vdev_top
);
5264 * Only remove any devices which are empty.
5266 if (vd
->vdev_stat
.vs_alloc
!= 0)
5269 (void) vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
5271 if (list_link_active(&vd
->vdev_state_dirty_node
))
5272 vdev_state_clean(vd
);
5273 if (list_link_active(&vd
->vdev_config_dirty_node
))
5274 vdev_config_clean(vd
);
5279 vdev_compact_children(rvd
);
5281 vd
= vdev_alloc_common(spa
, id
, 0, &vdev_hole_ops
);
5282 vdev_add_child(rvd
, vd
);
5284 vdev_config_dirty(rvd
);
5287 * Reassess the health of our root vdev.
5293 * Remove a device from the pool -
5295 * Removing a device from the vdev namespace requires several steps
5296 * and can take a significant amount of time. As a result we use
5297 * the spa_vdev_config_[enter/exit] functions which allow us to
5298 * grab and release the spa_config_lock while still holding the namespace
5299 * lock. During each step the configuration is synced out.
5301 * Currently, this supports removing only hot spares, slogs, and level 2 ARC
5305 spa_vdev_remove(spa_t
*spa
, uint64_t guid
, boolean_t unspare
)
5308 metaslab_group_t
*mg
;
5309 nvlist_t
**spares
, **l2cache
, *nv
;
5311 uint_t nspares
, nl2cache
;
5313 boolean_t locked
= MUTEX_HELD(&spa_namespace_lock
);
5315 ASSERT(spa_writeable(spa
));
5318 txg
= spa_vdev_enter(spa
);
5320 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
5322 if (spa
->spa_spares
.sav_vdevs
!= NULL
&&
5323 nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
5324 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0 &&
5325 (nv
= spa_nvlist_lookup_by_guid(spares
, nspares
, guid
)) != NULL
) {
5327 * Only remove the hot spare if it's not currently in use
5330 if (vd
== NULL
|| unspare
) {
5331 spa_vdev_remove_aux(spa
->spa_spares
.sav_config
,
5332 ZPOOL_CONFIG_SPARES
, spares
, nspares
, nv
);
5333 spa_load_spares(spa
);
5334 spa
->spa_spares
.sav_sync
= B_TRUE
;
5336 error
= SET_ERROR(EBUSY
);
5338 } else if (spa
->spa_l2cache
.sav_vdevs
!= NULL
&&
5339 nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
5340 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0 &&
5341 (nv
= spa_nvlist_lookup_by_guid(l2cache
, nl2cache
, guid
)) != NULL
) {
5343 * Cache devices can always be removed.
5345 spa_vdev_remove_aux(spa
->spa_l2cache
.sav_config
,
5346 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
, nv
);
5347 spa_load_l2cache(spa
);
5348 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
5349 } else if (vd
!= NULL
&& vd
->vdev_islog
) {
5351 ASSERT(vd
== vd
->vdev_top
);
5356 * Stop allocating from this vdev.
5358 metaslab_group_passivate(mg
);
5361 * Wait for the youngest allocations and frees to sync,
5362 * and then wait for the deferral of those frees to finish.
5364 spa_vdev_config_exit(spa
, NULL
,
5365 txg
+ TXG_CONCURRENT_STATES
+ TXG_DEFER_SIZE
, 0, FTAG
);
5368 * Attempt to evacuate the vdev.
5370 error
= spa_vdev_remove_evacuate(spa
, vd
);
5372 txg
= spa_vdev_config_enter(spa
);
5375 * If we couldn't evacuate the vdev, unwind.
5378 metaslab_group_activate(mg
);
5379 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5383 * Clean up the vdev namespace.
5385 spa_vdev_remove_from_namespace(spa
, vd
);
5387 } else if (vd
!= NULL
) {
5389 * Normal vdevs cannot be removed (yet).
5391 error
= SET_ERROR(ENOTSUP
);
5394 * There is no vdev of any kind with the specified guid.
5396 error
= SET_ERROR(ENOENT
);
5400 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5406 * Find any device that's done replacing, or a vdev marked 'unspare' that's
5407 * currently spared, so we can detach it.
5410 spa_vdev_resilver_done_hunt(vdev_t
*vd
)
5412 vdev_t
*newvd
, *oldvd
;
5414 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
5415 oldvd
= spa_vdev_resilver_done_hunt(vd
->vdev_child
[c
]);
5421 * Check for a completed replacement. We always consider the first
5422 * vdev in the list to be the oldest vdev, and the last one to be
5423 * the newest (see spa_vdev_attach() for how that works). In
5424 * the case where the newest vdev is faulted, we will not automatically
5425 * remove it after a resilver completes. This is OK as it will require
5426 * user intervention to determine which disk the admin wishes to keep.
5428 if (vd
->vdev_ops
== &vdev_replacing_ops
) {
5429 ASSERT(vd
->vdev_children
> 1);
5431 newvd
= vd
->vdev_child
[vd
->vdev_children
- 1];
5432 oldvd
= vd
->vdev_child
[0];
5434 if (vdev_dtl_empty(newvd
, DTL_MISSING
) &&
5435 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
5436 !vdev_dtl_required(oldvd
))
5441 * Check for a completed resilver with the 'unspare' flag set.
5443 if (vd
->vdev_ops
== &vdev_spare_ops
) {
5444 vdev_t
*first
= vd
->vdev_child
[0];
5445 vdev_t
*last
= vd
->vdev_child
[vd
->vdev_children
- 1];
5447 if (last
->vdev_unspare
) {
5450 } else if (first
->vdev_unspare
) {
5457 if (oldvd
!= NULL
&&
5458 vdev_dtl_empty(newvd
, DTL_MISSING
) &&
5459 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
5460 !vdev_dtl_required(oldvd
))
5464 * If there are more than two spares attached to a disk,
5465 * and those spares are not required, then we want to
5466 * attempt to free them up now so that they can be used
5467 * by other pools. Once we're back down to a single
5468 * disk+spare, we stop removing them.
5470 if (vd
->vdev_children
> 2) {
5471 newvd
= vd
->vdev_child
[1];
5473 if (newvd
->vdev_isspare
&& last
->vdev_isspare
&&
5474 vdev_dtl_empty(last
, DTL_MISSING
) &&
5475 vdev_dtl_empty(last
, DTL_OUTAGE
) &&
5476 !vdev_dtl_required(newvd
))
5485 spa_vdev_resilver_done(spa_t
*spa
)
5487 vdev_t
*vd
, *pvd
, *ppvd
;
5488 uint64_t guid
, sguid
, pguid
, ppguid
;
5490 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5492 while ((vd
= spa_vdev_resilver_done_hunt(spa
->spa_root_vdev
)) != NULL
) {
5493 pvd
= vd
->vdev_parent
;
5494 ppvd
= pvd
->vdev_parent
;
5495 guid
= vd
->vdev_guid
;
5496 pguid
= pvd
->vdev_guid
;
5497 ppguid
= ppvd
->vdev_guid
;
5500 * If we have just finished replacing a hot spared device, then
5501 * we need to detach the parent's first child (the original hot
5504 if (ppvd
->vdev_ops
== &vdev_spare_ops
&& pvd
->vdev_id
== 0 &&
5505 ppvd
->vdev_children
== 2) {
5506 ASSERT(pvd
->vdev_ops
== &vdev_replacing_ops
);
5507 sguid
= ppvd
->vdev_child
[1]->vdev_guid
;
5509 ASSERT(vd
->vdev_resilver_txg
== 0 || !vdev_dtl_required(vd
));
5511 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5512 if (spa_vdev_detach(spa
, guid
, pguid
, B_TRUE
) != 0)
5514 if (sguid
&& spa_vdev_detach(spa
, sguid
, ppguid
, B_TRUE
) != 0)
5516 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5519 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5523 * Update the stored path or FRU for this vdev.
5526 spa_vdev_set_common(spa_t
*spa
, uint64_t guid
, const char *value
,
5530 boolean_t sync
= B_FALSE
;
5532 ASSERT(spa_writeable(spa
));
5534 spa_vdev_state_enter(spa
, SCL_ALL
);
5536 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
5537 return (spa_vdev_state_exit(spa
, NULL
, ENOENT
));
5539 if (!vd
->vdev_ops
->vdev_op_leaf
)
5540 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
5543 if (strcmp(value
, vd
->vdev_path
) != 0) {
5544 spa_strfree(vd
->vdev_path
);
5545 vd
->vdev_path
= spa_strdup(value
);
5549 if (vd
->vdev_fru
== NULL
) {
5550 vd
->vdev_fru
= spa_strdup(value
);
5552 } else if (strcmp(value
, vd
->vdev_fru
) != 0) {
5553 spa_strfree(vd
->vdev_fru
);
5554 vd
->vdev_fru
= spa_strdup(value
);
5559 return (spa_vdev_state_exit(spa
, sync
? vd
: NULL
, 0));
5563 spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
)
5565 return (spa_vdev_set_common(spa
, guid
, newpath
, B_TRUE
));
5569 spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
)
5571 return (spa_vdev_set_common(spa
, guid
, newfru
, B_FALSE
));
5575 * ==========================================================================
5577 * ==========================================================================
5581 spa_scan_stop(spa_t
*spa
)
5583 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5584 if (dsl_scan_resilvering(spa
->spa_dsl_pool
))
5585 return (SET_ERROR(EBUSY
));
5586 return (dsl_scan_cancel(spa
->spa_dsl_pool
));
5590 spa_scan(spa_t
*spa
, pool_scan_func_t func
)
5592 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5594 if (func
>= POOL_SCAN_FUNCS
|| func
== POOL_SCAN_NONE
)
5595 return (SET_ERROR(ENOTSUP
));
5598 * If a resilver was requested, but there is no DTL on a
5599 * writeable leaf device, we have nothing to do.
5601 if (func
== POOL_SCAN_RESILVER
&&
5602 !vdev_resilver_needed(spa
->spa_root_vdev
, NULL
, NULL
)) {
5603 spa_async_request(spa
, SPA_ASYNC_RESILVER_DONE
);
5607 return (dsl_scan(spa
->spa_dsl_pool
, func
));
5611 * ==========================================================================
5612 * SPA async task processing
5613 * ==========================================================================
5617 spa_async_remove(spa_t
*spa
, vdev_t
*vd
)
5619 if (vd
->vdev_remove_wanted
) {
5620 vd
->vdev_remove_wanted
= B_FALSE
;
5621 vd
->vdev_delayed_close
= B_FALSE
;
5622 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_REMOVED
, VDEV_AUX_NONE
);
5625 * We want to clear the stats, but we don't want to do a full
5626 * vdev_clear() as that will cause us to throw away
5627 * degraded/faulted state as well as attempt to reopen the
5628 * device, all of which is a waste.
5630 vd
->vdev_stat
.vs_read_errors
= 0;
5631 vd
->vdev_stat
.vs_write_errors
= 0;
5632 vd
->vdev_stat
.vs_checksum_errors
= 0;
5634 vdev_state_dirty(vd
->vdev_top
);
5637 for (int c
= 0; c
< vd
->vdev_children
; c
++)
5638 spa_async_remove(spa
, vd
->vdev_child
[c
]);
5642 spa_async_probe(spa_t
*spa
, vdev_t
*vd
)
5644 if (vd
->vdev_probe_wanted
) {
5645 vd
->vdev_probe_wanted
= B_FALSE
;
5646 vdev_reopen(vd
); /* vdev_open() does the actual probe */
5649 for (int c
= 0; c
< vd
->vdev_children
; c
++)
5650 spa_async_probe(spa
, vd
->vdev_child
[c
]);
5654 spa_async_autoexpand(spa_t
*spa
, vdev_t
*vd
)
5660 if (!spa
->spa_autoexpand
)
5663 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
5664 vdev_t
*cvd
= vd
->vdev_child
[c
];
5665 spa_async_autoexpand(spa
, cvd
);
5668 if (!vd
->vdev_ops
->vdev_op_leaf
|| vd
->vdev_physpath
== NULL
)
5671 physpath
= kmem_zalloc(MAXPATHLEN
, KM_SLEEP
);
5672 (void) snprintf(physpath
, MAXPATHLEN
, "/devices%s", vd
->vdev_physpath
);
5674 VERIFY(nvlist_alloc(&attr
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5675 VERIFY(nvlist_add_string(attr
, DEV_PHYS_PATH
, physpath
) == 0);
5677 (void) ddi_log_sysevent(zfs_dip
, SUNW_VENDOR
, EC_DEV_STATUS
,
5678 ESC_DEV_DLE
, attr
, &eid
, DDI_SLEEP
);
5681 kmem_free(physpath
, MAXPATHLEN
);
5685 spa_async_thread(spa_t
*spa
)
5689 ASSERT(spa
->spa_sync_on
);
5691 mutex_enter(&spa
->spa_async_lock
);
5692 tasks
= spa
->spa_async_tasks
;
5693 spa
->spa_async_tasks
= 0;
5694 mutex_exit(&spa
->spa_async_lock
);
5697 * See if the config needs to be updated.
5699 if (tasks
& SPA_ASYNC_CONFIG_UPDATE
) {
5700 uint64_t old_space
, new_space
;
5702 mutex_enter(&spa_namespace_lock
);
5703 old_space
= metaslab_class_get_space(spa_normal_class(spa
));
5704 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
5705 new_space
= metaslab_class_get_space(spa_normal_class(spa
));
5706 mutex_exit(&spa_namespace_lock
);
5709 * If the pool grew as a result of the config update,
5710 * then log an internal history event.
5712 if (new_space
!= old_space
) {
5713 spa_history_log_internal(spa
, "vdev online", NULL
,
5714 "pool '%s' size: %llu(+%llu)",
5715 spa_name(spa
), new_space
, new_space
- old_space
);
5720 * See if any devices need to be marked REMOVED.
5722 if (tasks
& SPA_ASYNC_REMOVE
) {
5723 spa_vdev_state_enter(spa
, SCL_NONE
);
5724 spa_async_remove(spa
, spa
->spa_root_vdev
);
5725 for (int i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
5726 spa_async_remove(spa
, spa
->spa_l2cache
.sav_vdevs
[i
]);
5727 for (int i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
5728 spa_async_remove(spa
, spa
->spa_spares
.sav_vdevs
[i
]);
5729 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5732 if ((tasks
& SPA_ASYNC_AUTOEXPAND
) && !spa_suspended(spa
)) {
5733 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5734 spa_async_autoexpand(spa
, spa
->spa_root_vdev
);
5735 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5739 * See if any devices need to be probed.
5741 if (tasks
& SPA_ASYNC_PROBE
) {
5742 spa_vdev_state_enter(spa
, SCL_NONE
);
5743 spa_async_probe(spa
, spa
->spa_root_vdev
);
5744 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5748 * If any devices are done replacing, detach them.
5750 if (tasks
& SPA_ASYNC_RESILVER_DONE
)
5751 spa_vdev_resilver_done(spa
);
5754 * Kick off a resilver.
5756 if (tasks
& SPA_ASYNC_RESILVER
)
5757 dsl_resilver_restart(spa
->spa_dsl_pool
, 0);
5760 * Let the world know that we're done.
5762 mutex_enter(&spa
->spa_async_lock
);
5763 spa
->spa_async_thread
= NULL
;
5764 cv_broadcast(&spa
->spa_async_cv
);
5765 mutex_exit(&spa
->spa_async_lock
);
5770 spa_async_suspend(spa_t
*spa
)
5772 mutex_enter(&spa
->spa_async_lock
);
5773 spa
->spa_async_suspended
++;
5774 while (spa
->spa_async_thread
!= NULL
)
5775 cv_wait(&spa
->spa_async_cv
, &spa
->spa_async_lock
);
5776 mutex_exit(&spa
->spa_async_lock
);
5780 spa_async_resume(spa_t
*spa
)
5782 mutex_enter(&spa
->spa_async_lock
);
5783 ASSERT(spa
->spa_async_suspended
!= 0);
5784 spa
->spa_async_suspended
--;
5785 mutex_exit(&spa
->spa_async_lock
);
5789 spa_async_tasks_pending(spa_t
*spa
)
5791 uint_t non_config_tasks
;
5793 boolean_t config_task_suspended
;
5795 non_config_tasks
= spa
->spa_async_tasks
& ~SPA_ASYNC_CONFIG_UPDATE
;
5796 config_task
= spa
->spa_async_tasks
& SPA_ASYNC_CONFIG_UPDATE
;
5797 if (spa
->spa_ccw_fail_time
== 0) {
5798 config_task_suspended
= B_FALSE
;
5800 config_task_suspended
=
5801 (gethrtime() - spa
->spa_ccw_fail_time
) <
5802 (zfs_ccw_retry_interval
* NANOSEC
);
5805 return (non_config_tasks
|| (config_task
&& !config_task_suspended
));
5809 spa_async_dispatch(spa_t
*spa
)
5811 mutex_enter(&spa
->spa_async_lock
);
5812 if (spa_async_tasks_pending(spa
) &&
5813 !spa
->spa_async_suspended
&&
5814 spa
->spa_async_thread
== NULL
&&
5816 spa
->spa_async_thread
= thread_create(NULL
, 0,
5817 spa_async_thread
, spa
, 0, &p0
, TS_RUN
, maxclsyspri
);
5818 mutex_exit(&spa
->spa_async_lock
);
5822 spa_async_request(spa_t
*spa
, int task
)
5824 zfs_dbgmsg("spa=%s async request task=%u", spa
->spa_name
, task
);
5825 mutex_enter(&spa
->spa_async_lock
);
5826 spa
->spa_async_tasks
|= task
;
5827 mutex_exit(&spa
->spa_async_lock
);
5831 * ==========================================================================
5832 * SPA syncing routines
5833 * ==========================================================================
5837 bpobj_enqueue_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5840 bpobj_enqueue(bpo
, bp
, tx
);
5845 spa_free_sync_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
5849 zio_nowait(zio_free_sync(zio
, zio
->io_spa
, dmu_tx_get_txg(tx
), bp
,
5855 * Note: this simple function is not inlined to make it easier to dtrace the
5856 * amount of time spent syncing frees.
5859 spa_sync_frees(spa_t
*spa
, bplist_t
*bpl
, dmu_tx_t
*tx
)
5861 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
5862 bplist_iterate(bpl
, spa_free_sync_cb
, zio
, tx
);
5863 VERIFY(zio_wait(zio
) == 0);
5867 * Note: this simple function is not inlined to make it easier to dtrace the
5868 * amount of time spent syncing deferred frees.
5871 spa_sync_deferred_frees(spa_t
*spa
, dmu_tx_t
*tx
)
5873 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
5874 VERIFY3U(bpobj_iterate(&spa
->spa_deferred_bpobj
,
5875 spa_free_sync_cb
, zio
, tx
), ==, 0);
5876 VERIFY0(zio_wait(zio
));
5881 spa_sync_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
*nv
, dmu_tx_t
*tx
)
5883 char *packed
= NULL
;
5888 VERIFY(nvlist_size(nv
, &nvsize
, NV_ENCODE_XDR
) == 0);
5891 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
5892 * information. This avoids the dmu_buf_will_dirty() path and
5893 * saves us a pre-read to get data we don't actually care about.
5895 bufsize
= P2ROUNDUP((uint64_t)nvsize
, SPA_CONFIG_BLOCKSIZE
);
5896 packed
= kmem_alloc(bufsize
, KM_SLEEP
);
5898 VERIFY(nvlist_pack(nv
, &packed
, &nvsize
, NV_ENCODE_XDR
,
5900 bzero(packed
+ nvsize
, bufsize
- nvsize
);
5902 dmu_write(spa
->spa_meta_objset
, obj
, 0, bufsize
, packed
, tx
);
5904 kmem_free(packed
, bufsize
);
5906 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
5907 dmu_buf_will_dirty(db
, tx
);
5908 *(uint64_t *)db
->db_data
= nvsize
;
5909 dmu_buf_rele(db
, FTAG
);
5913 spa_sync_aux_dev(spa_t
*spa
, spa_aux_vdev_t
*sav
, dmu_tx_t
*tx
,
5914 const char *config
, const char *entry
)
5924 * Update the MOS nvlist describing the list of available devices.
5925 * spa_validate_aux() will have already made sure this nvlist is
5926 * valid and the vdevs are labeled appropriately.
5928 if (sav
->sav_object
== 0) {
5929 sav
->sav_object
= dmu_object_alloc(spa
->spa_meta_objset
,
5930 DMU_OT_PACKED_NVLIST
, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE
,
5931 sizeof (uint64_t), tx
);
5932 VERIFY(zap_update(spa
->spa_meta_objset
,
5933 DMU_POOL_DIRECTORY_OBJECT
, entry
, sizeof (uint64_t), 1,
5934 &sav
->sav_object
, tx
) == 0);
5937 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5938 if (sav
->sav_count
== 0) {
5939 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, NULL
, 0) == 0);
5941 list
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
5942 for (i
= 0; i
< sav
->sav_count
; i
++)
5943 list
[i
] = vdev_config_generate(spa
, sav
->sav_vdevs
[i
],
5944 B_FALSE
, VDEV_CONFIG_L2CACHE
);
5945 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, list
,
5946 sav
->sav_count
) == 0);
5947 for (i
= 0; i
< sav
->sav_count
; i
++)
5948 nvlist_free(list
[i
]);
5949 kmem_free(list
, sav
->sav_count
* sizeof (void *));
5952 spa_sync_nvlist(spa
, sav
->sav_object
, nvroot
, tx
);
5953 nvlist_free(nvroot
);
5955 sav
->sav_sync
= B_FALSE
;
5959 spa_sync_config_object(spa_t
*spa
, dmu_tx_t
*tx
)
5963 if (list_is_empty(&spa
->spa_config_dirty_list
))
5966 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
5968 config
= spa_config_generate(spa
, spa
->spa_root_vdev
,
5969 dmu_tx_get_txg(tx
), B_FALSE
);
5972 * If we're upgrading the spa version then make sure that
5973 * the config object gets updated with the correct version.
5975 if (spa
->spa_ubsync
.ub_version
< spa
->spa_uberblock
.ub_version
)
5976 fnvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
5977 spa
->spa_uberblock
.ub_version
);
5979 spa_config_exit(spa
, SCL_STATE
, FTAG
);
5981 if (spa
->spa_config_syncing
)
5982 nvlist_free(spa
->spa_config_syncing
);
5983 spa
->spa_config_syncing
= config
;
5985 spa_sync_nvlist(spa
, spa
->spa_config_object
, config
, tx
);
5989 spa_sync_version(void *arg
, dmu_tx_t
*tx
)
5991 uint64_t *versionp
= arg
;
5992 uint64_t version
= *versionp
;
5993 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
5996 * Setting the version is special cased when first creating the pool.
5998 ASSERT(tx
->tx_txg
!= TXG_INITIAL
);
6000 ASSERT(SPA_VERSION_IS_SUPPORTED(version
));
6001 ASSERT(version
>= spa_version(spa
));
6003 spa
->spa_uberblock
.ub_version
= version
;
6004 vdev_config_dirty(spa
->spa_root_vdev
);
6005 spa_history_log_internal(spa
, "set", tx
, "version=%lld", version
);
6009 * Set zpool properties.
6012 spa_sync_props(void *arg
, dmu_tx_t
*tx
)
6014 nvlist_t
*nvp
= arg
;
6015 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
6016 objset_t
*mos
= spa
->spa_meta_objset
;
6017 nvpair_t
*elem
= NULL
;
6019 mutex_enter(&spa
->spa_props_lock
);
6021 while ((elem
= nvlist_next_nvpair(nvp
, elem
))) {
6023 char *strval
, *fname
;
6025 const char *propname
;
6026 zprop_type_t proptype
;
6029 switch (prop
= zpool_name_to_prop(nvpair_name(elem
))) {
6032 * We checked this earlier in spa_prop_validate().
6034 ASSERT(zpool_prop_feature(nvpair_name(elem
)));
6036 fname
= strchr(nvpair_name(elem
), '@') + 1;
6037 VERIFY0(zfeature_lookup_name(fname
, &fid
));
6039 spa_feature_enable(spa
, fid
, tx
);
6040 spa_history_log_internal(spa
, "set", tx
,
6041 "%s=enabled", nvpair_name(elem
));
6044 case ZPOOL_PROP_VERSION
:
6045 intval
= fnvpair_value_uint64(elem
);
6047 * The version is synced seperatly before other
6048 * properties and should be correct by now.
6050 ASSERT3U(spa_version(spa
), >=, intval
);
6053 case ZPOOL_PROP_ALTROOT
:
6055 * 'altroot' is a non-persistent property. It should
6056 * have been set temporarily at creation or import time.
6058 ASSERT(spa
->spa_root
!= NULL
);
6061 case ZPOOL_PROP_READONLY
:
6062 case ZPOOL_PROP_CACHEFILE
:
6064 * 'readonly' and 'cachefile' are also non-persisitent
6068 case ZPOOL_PROP_COMMENT
:
6069 strval
= fnvpair_value_string(elem
);
6070 if (spa
->spa_comment
!= NULL
)
6071 spa_strfree(spa
->spa_comment
);
6072 spa
->spa_comment
= spa_strdup(strval
);
6074 * We need to dirty the configuration on all the vdevs
6075 * so that their labels get updated. It's unnecessary
6076 * to do this for pool creation since the vdev's
6077 * configuratoin has already been dirtied.
6079 if (tx
->tx_txg
!= TXG_INITIAL
)
6080 vdev_config_dirty(spa
->spa_root_vdev
);
6081 spa_history_log_internal(spa
, "set", tx
,
6082 "%s=%s", nvpair_name(elem
), strval
);
6086 * Set pool property values in the poolprops mos object.
6088 if (spa
->spa_pool_props_object
== 0) {
6089 spa
->spa_pool_props_object
=
6090 zap_create_link(mos
, DMU_OT_POOL_PROPS
,
6091 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_PROPS
,
6095 /* normalize the property name */
6096 propname
= zpool_prop_to_name(prop
);
6097 proptype
= zpool_prop_get_type(prop
);
6099 if (nvpair_type(elem
) == DATA_TYPE_STRING
) {
6100 ASSERT(proptype
== PROP_TYPE_STRING
);
6101 strval
= fnvpair_value_string(elem
);
6102 VERIFY0(zap_update(mos
,
6103 spa
->spa_pool_props_object
, propname
,
6104 1, strlen(strval
) + 1, strval
, tx
));
6105 spa_history_log_internal(spa
, "set", tx
,
6106 "%s=%s", nvpair_name(elem
), strval
);
6107 } else if (nvpair_type(elem
) == DATA_TYPE_UINT64
) {
6108 intval
= fnvpair_value_uint64(elem
);
6110 if (proptype
== PROP_TYPE_INDEX
) {
6112 VERIFY0(zpool_prop_index_to_string(
6113 prop
, intval
, &unused
));
6115 VERIFY0(zap_update(mos
,
6116 spa
->spa_pool_props_object
, propname
,
6117 8, 1, &intval
, tx
));
6118 spa_history_log_internal(spa
, "set", tx
,
6119 "%s=%lld", nvpair_name(elem
), intval
);
6121 ASSERT(0); /* not allowed */
6125 case ZPOOL_PROP_DELEGATION
:
6126 spa
->spa_delegation
= intval
;
6128 case ZPOOL_PROP_BOOTFS
:
6129 spa
->spa_bootfs
= intval
;
6131 case ZPOOL_PROP_FAILUREMODE
:
6132 spa
->spa_failmode
= intval
;
6134 case ZPOOL_PROP_AUTOEXPAND
:
6135 spa
->spa_autoexpand
= intval
;
6136 if (tx
->tx_txg
!= TXG_INITIAL
)
6137 spa_async_request(spa
,
6138 SPA_ASYNC_AUTOEXPAND
);
6140 case ZPOOL_PROP_DEDUPDITTO
:
6141 spa
->spa_dedup_ditto
= intval
;
6150 mutex_exit(&spa
->spa_props_lock
);
6154 * Perform one-time upgrade on-disk changes. spa_version() does not
6155 * reflect the new version this txg, so there must be no changes this
6156 * txg to anything that the upgrade code depends on after it executes.
6157 * Therefore this must be called after dsl_pool_sync() does the sync
6161 spa_sync_upgrades(spa_t
*spa
, dmu_tx_t
*tx
)
6163 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
6165 ASSERT(spa
->spa_sync_pass
== 1);
6167 rrw_enter(&dp
->dp_config_rwlock
, RW_WRITER
, FTAG
);
6169 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_ORIGIN
&&
6170 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_ORIGIN
) {
6171 dsl_pool_create_origin(dp
, tx
);
6173 /* Keeping the origin open increases spa_minref */
6174 spa
->spa_minref
+= 3;
6177 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_NEXT_CLONES
&&
6178 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_NEXT_CLONES
) {
6179 dsl_pool_upgrade_clones(dp
, tx
);
6182 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_DIR_CLONES
&&
6183 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_DIR_CLONES
) {
6184 dsl_pool_upgrade_dir_clones(dp
, tx
);
6186 /* Keeping the freedir open increases spa_minref */
6187 spa
->spa_minref
+= 3;
6190 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_FEATURES
&&
6191 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_FEATURES
) {
6192 spa_feature_create_zap_objects(spa
, tx
);
6196 * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable
6197 * when possibility to use lz4 compression for metadata was added
6198 * Old pools that have this feature enabled must be upgraded to have
6199 * this feature active
6201 if (spa
->spa_uberblock
.ub_version
>= SPA_VERSION_FEATURES
) {
6202 boolean_t lz4_en
= spa_feature_is_enabled(spa
,
6203 SPA_FEATURE_LZ4_COMPRESS
);
6204 boolean_t lz4_ac
= spa_feature_is_active(spa
,
6205 SPA_FEATURE_LZ4_COMPRESS
);
6207 if (lz4_en
&& !lz4_ac
)
6208 spa_feature_incr(spa
, SPA_FEATURE_LZ4_COMPRESS
, tx
);
6210 rrw_exit(&dp
->dp_config_rwlock
, FTAG
);
6214 * Sync the specified transaction group. New blocks may be dirtied as
6215 * part of the process, so we iterate until it converges.
6218 spa_sync(spa_t
*spa
, uint64_t txg
)
6220 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
6221 objset_t
*mos
= spa
->spa_meta_objset
;
6222 bplist_t
*free_bpl
= &spa
->spa_free_bplist
[txg
& TXG_MASK
];
6223 vdev_t
*rvd
= spa
->spa_root_vdev
;
6228 VERIFY(spa_writeable(spa
));
6231 * Lock out configuration changes.
6233 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
6235 spa
->spa_syncing_txg
= txg
;
6236 spa
->spa_sync_pass
= 0;
6239 * If there are any pending vdev state changes, convert them
6240 * into config changes that go out with this transaction group.
6242 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
6243 while (list_head(&spa
->spa_state_dirty_list
) != NULL
) {
6245 * We need the write lock here because, for aux vdevs,
6246 * calling vdev_config_dirty() modifies sav_config.
6247 * This is ugly and will become unnecessary when we
6248 * eliminate the aux vdev wart by integrating all vdevs
6249 * into the root vdev tree.
6251 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
6252 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_WRITER
);
6253 while ((vd
= list_head(&spa
->spa_state_dirty_list
)) != NULL
) {
6254 vdev_state_clean(vd
);
6255 vdev_config_dirty(vd
);
6257 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
6258 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_READER
);
6260 spa_config_exit(spa
, SCL_STATE
, FTAG
);
6262 tx
= dmu_tx_create_assigned(dp
, txg
);
6264 spa
->spa_sync_starttime
= gethrtime();
6265 VERIFY(cyclic_reprogram(spa
->spa_deadman_cycid
,
6266 spa
->spa_sync_starttime
+ spa
->spa_deadman_synctime
));
6269 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
6270 * set spa_deflate if we have no raid-z vdevs.
6272 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_RAIDZ_DEFLATE
&&
6273 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
6276 for (i
= 0; i
< rvd
->vdev_children
; i
++) {
6277 vd
= rvd
->vdev_child
[i
];
6278 if (vd
->vdev_deflate_ratio
!= SPA_MINBLOCKSIZE
)
6281 if (i
== rvd
->vdev_children
) {
6282 spa
->spa_deflate
= TRUE
;
6283 VERIFY(0 == zap_add(spa
->spa_meta_objset
,
6284 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
6285 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
));
6290 * Iterate to convergence.
6293 int pass
= ++spa
->spa_sync_pass
;
6295 spa_sync_config_object(spa
, tx
);
6296 spa_sync_aux_dev(spa
, &spa
->spa_spares
, tx
,
6297 ZPOOL_CONFIG_SPARES
, DMU_POOL_SPARES
);
6298 spa_sync_aux_dev(spa
, &spa
->spa_l2cache
, tx
,
6299 ZPOOL_CONFIG_L2CACHE
, DMU_POOL_L2CACHE
);
6300 spa_errlog_sync(spa
, txg
);
6301 dsl_pool_sync(dp
, txg
);
6303 if (pass
< zfs_sync_pass_deferred_free
) {
6304 spa_sync_frees(spa
, free_bpl
, tx
);
6307 * We can not defer frees in pass 1, because
6308 * we sync the deferred frees later in pass 1.
6310 ASSERT3U(pass
, >, 1);
6311 bplist_iterate(free_bpl
, bpobj_enqueue_cb
,
6312 &spa
->spa_deferred_bpobj
, tx
);
6316 dsl_scan_sync(dp
, tx
);
6318 while (vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, txg
))
6322 spa_sync_upgrades(spa
, tx
);
6324 spa
->spa_uberblock
.ub_rootbp
.blk_birth
);
6326 * Note: We need to check if the MOS is dirty
6327 * because we could have marked the MOS dirty
6328 * without updating the uberblock (e.g. if we
6329 * have sync tasks but no dirty user data). We
6330 * need to check the uberblock's rootbp because
6331 * it is updated if we have synced out dirty
6332 * data (though in this case the MOS will most
6333 * likely also be dirty due to second order
6334 * effects, we don't want to rely on that here).
6336 if (spa
->spa_uberblock
.ub_rootbp
.blk_birth
< txg
&&
6337 !dmu_objset_is_dirty(mos
, txg
)) {
6339 * Nothing changed on the first pass,
6340 * therefore this TXG is a no-op. Avoid
6341 * syncing deferred frees, so that we
6342 * can keep this TXG as a no-op.
6344 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
,
6346 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
6347 ASSERT(txg_list_empty(&dp
->dp_sync_tasks
, txg
));
6350 spa_sync_deferred_frees(spa
, tx
);
6353 } while (dmu_objset_is_dirty(mos
, txg
));
6356 * Rewrite the vdev configuration (which includes the uberblock)
6357 * to commit the transaction group.
6359 * If there are no dirty vdevs, we sync the uberblock to a few
6360 * random top-level vdevs that are known to be visible in the
6361 * config cache (see spa_vdev_add() for a complete description).
6362 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
6366 * We hold SCL_STATE to prevent vdev open/close/etc.
6367 * while we're attempting to write the vdev labels.
6369 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
6371 if (list_is_empty(&spa
->spa_config_dirty_list
)) {
6372 vdev_t
*svd
[SPA_DVAS_PER_BP
];
6374 int children
= rvd
->vdev_children
;
6375 int c0
= spa_get_random(children
);
6377 for (int c
= 0; c
< children
; c
++) {
6378 vd
= rvd
->vdev_child
[(c0
+ c
) % children
];
6379 if (vd
->vdev_ms_array
== 0 || vd
->vdev_islog
)
6381 svd
[svdcount
++] = vd
;
6382 if (svdcount
== SPA_DVAS_PER_BP
)
6385 error
= vdev_config_sync(svd
, svdcount
, txg
, B_FALSE
);
6387 error
= vdev_config_sync(svd
, svdcount
, txg
,
6390 error
= vdev_config_sync(rvd
->vdev_child
,
6391 rvd
->vdev_children
, txg
, B_FALSE
);
6393 error
= vdev_config_sync(rvd
->vdev_child
,
6394 rvd
->vdev_children
, txg
, B_TRUE
);
6398 spa
->spa_last_synced_guid
= rvd
->vdev_guid
;
6400 spa_config_exit(spa
, SCL_STATE
, FTAG
);
6404 zio_suspend(spa
, NULL
);
6405 zio_resume_wait(spa
);
6409 VERIFY(cyclic_reprogram(spa
->spa_deadman_cycid
, CY_INFINITY
));
6412 * Clear the dirty config list.
6414 while ((vd
= list_head(&spa
->spa_config_dirty_list
)) != NULL
)
6415 vdev_config_clean(vd
);
6418 * Now that the new config has synced transactionally,
6419 * let it become visible to the config cache.
6421 if (spa
->spa_config_syncing
!= NULL
) {
6422 spa_config_set(spa
, spa
->spa_config_syncing
);
6423 spa
->spa_config_txg
= txg
;
6424 spa
->spa_config_syncing
= NULL
;
6427 spa
->spa_ubsync
= spa
->spa_uberblock
;
6429 dsl_pool_sync_done(dp
, txg
);
6432 * Update usable space statistics.
6434 while (vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, TXG_CLEAN(txg
)))
6435 vdev_sync_done(vd
, txg
);
6437 spa_update_dspace(spa
);
6440 * It had better be the case that we didn't dirty anything
6441 * since vdev_config_sync().
6443 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
, txg
));
6444 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
6445 ASSERT(txg_list_empty(&spa
->spa_vdev_txg_list
, txg
));
6447 spa
->spa_sync_pass
= 0;
6449 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
6451 spa_handle_ignored_writes(spa
);
6454 * If any async tasks have been requested, kick them off.
6456 spa_async_dispatch(spa
);
6460 * Sync all pools. We don't want to hold the namespace lock across these
6461 * operations, so we take a reference on the spa_t and drop the lock during the
6465 spa_sync_allpools(void)
6468 mutex_enter(&spa_namespace_lock
);
6469 while ((spa
= spa_next(spa
)) != NULL
) {
6470 if (spa_state(spa
) != POOL_STATE_ACTIVE
||
6471 !spa_writeable(spa
) || spa_suspended(spa
))
6473 spa_open_ref(spa
, FTAG
);
6474 mutex_exit(&spa_namespace_lock
);
6475 txg_wait_synced(spa_get_dsl(spa
), 0);
6476 mutex_enter(&spa_namespace_lock
);
6477 spa_close(spa
, FTAG
);
6479 mutex_exit(&spa_namespace_lock
);
6483 * ==========================================================================
6484 * Miscellaneous routines
6485 * ==========================================================================
6489 * Remove all pools in the system.
6497 * Remove all cached state. All pools should be closed now,
6498 * so every spa in the AVL tree should be unreferenced.
6500 mutex_enter(&spa_namespace_lock
);
6501 while ((spa
= spa_next(NULL
)) != NULL
) {
6503 * Stop async tasks. The async thread may need to detach
6504 * a device that's been replaced, which requires grabbing
6505 * spa_namespace_lock, so we must drop it here.
6507 spa_open_ref(spa
, FTAG
);
6508 mutex_exit(&spa_namespace_lock
);
6509 spa_async_suspend(spa
);
6510 mutex_enter(&spa_namespace_lock
);
6511 spa_close(spa
, FTAG
);
6513 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
6515 spa_deactivate(spa
);
6519 mutex_exit(&spa_namespace_lock
);
6523 spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
, boolean_t aux
)
6528 if ((vd
= vdev_lookup_by_guid(spa
->spa_root_vdev
, guid
)) != NULL
)
6532 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
6533 vd
= spa
->spa_l2cache
.sav_vdevs
[i
];
6534 if (vd
->vdev_guid
== guid
)
6538 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
6539 vd
= spa
->spa_spares
.sav_vdevs
[i
];
6540 if (vd
->vdev_guid
== guid
)
6549 spa_upgrade(spa_t
*spa
, uint64_t version
)
6551 ASSERT(spa_writeable(spa
));
6553 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
6556 * This should only be called for a non-faulted pool, and since a
6557 * future version would result in an unopenable pool, this shouldn't be
6560 ASSERT(SPA_VERSION_IS_SUPPORTED(spa
->spa_uberblock
.ub_version
));
6561 ASSERT3U(version
, >=, spa
->spa_uberblock
.ub_version
);
6563 spa
->spa_uberblock
.ub_version
= version
;
6564 vdev_config_dirty(spa
->spa_root_vdev
);
6566 spa_config_exit(spa
, SCL_ALL
, FTAG
);
6568 txg_wait_synced(spa_get_dsl(spa
), 0);
6572 spa_has_spare(spa_t
*spa
, uint64_t guid
)
6576 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
6578 for (i
= 0; i
< sav
->sav_count
; i
++)
6579 if (sav
->sav_vdevs
[i
]->vdev_guid
== guid
)
6582 for (i
= 0; i
< sav
->sav_npending
; i
++) {
6583 if (nvlist_lookup_uint64(sav
->sav_pending
[i
], ZPOOL_CONFIG_GUID
,
6584 &spareguid
) == 0 && spareguid
== guid
)
6592 * Check if a pool has an active shared spare device.
6593 * Note: reference count of an active spare is 2, as a spare and as a replace
6596 spa_has_active_shared_spare(spa_t
*spa
)
6600 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
6602 for (i
= 0; i
< sav
->sav_count
; i
++) {
6603 if (spa_spare_exists(sav
->sav_vdevs
[i
]->vdev_guid
, &pool
,
6604 &refcnt
) && pool
!= 0ULL && pool
== spa_guid(spa
) &&
6613 * Post a sysevent corresponding to the given event. The 'name' must be one of
6614 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
6615 * filled in from the spa and (optionally) the vdev. This doesn't do anything
6616 * in the userland libzpool, as we don't want consumers to misinterpret ztest
6617 * or zdb as real changes.
6620 spa_event_notify(spa_t
*spa
, vdev_t
*vd
, const char *name
)
6624 sysevent_attr_list_t
*attr
= NULL
;
6625 sysevent_value_t value
;
6628 ev
= sysevent_alloc(EC_ZFS
, (char *)name
, SUNW_KERN_PUB
"zfs",
6631 value
.value_type
= SE_DATA_TYPE_STRING
;
6632 value
.value
.sv_string
= spa_name(spa
);
6633 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_NAME
, &value
, SE_SLEEP
) != 0)
6636 value
.value_type
= SE_DATA_TYPE_UINT64
;
6637 value
.value
.sv_uint64
= spa_guid(spa
);
6638 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_GUID
, &value
, SE_SLEEP
) != 0)
6642 value
.value_type
= SE_DATA_TYPE_UINT64
;
6643 value
.value
.sv_uint64
= vd
->vdev_guid
;
6644 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_GUID
, &value
,
6648 if (vd
->vdev_path
) {
6649 value
.value_type
= SE_DATA_TYPE_STRING
;
6650 value
.value
.sv_string
= vd
->vdev_path
;
6651 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_PATH
,
6652 &value
, SE_SLEEP
) != 0)
6657 if (sysevent_attach_attributes(ev
, attr
) != 0)
6661 (void) log_sysevent(ev
, SE_SLEEP
, &eid
);
6665 sysevent_free_attr(attr
);