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, 2018 by Delphix. All rights reserved.
25 * Copyright (c) 2015, Nexenta Systems, Inc. All rights reserved.
26 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
27 * Copyright 2013 Saso Kiselkov. All rights reserved.
28 * Copyright (c) 2014 Integros [integros.com]
29 * Copyright 2016 Toomas Soome <tsoome@me.com>
30 * Copyright 2017 Joyent, Inc.
31 * Copyright (c) 2017 Datto Inc.
32 * Copyright 2018 OmniOS Community Edition (OmniOSce) Association.
36 * SPA: Storage Pool Allocator
38 * This file contains all the routines used when modifying on-disk SPA state.
39 * This includes opening, importing, destroying, exporting a pool, and syncing a
43 #include <sys/zfs_context.h>
44 #include <sys/fm/fs/zfs.h>
45 #include <sys/spa_impl.h>
47 #include <sys/zio_checksum.h>
49 #include <sys/dmu_tx.h>
53 #include <sys/vdev_impl.h>
54 #include <sys/vdev_removal.h>
55 #include <sys/vdev_indirect_mapping.h>
56 #include <sys/vdev_indirect_births.h>
57 #include <sys/vdev_initialize.h>
58 #include <sys/metaslab.h>
59 #include <sys/metaslab_impl.h>
60 #include <sys/uberblock_impl.h>
63 #include <sys/bpobj.h>
64 #include <sys/dmu_traverse.h>
65 #include <sys/dmu_objset.h>
66 #include <sys/unique.h>
67 #include <sys/dsl_pool.h>
68 #include <sys/dsl_dataset.h>
69 #include <sys/dsl_dir.h>
70 #include <sys/dsl_prop.h>
71 #include <sys/dsl_synctask.h>
72 #include <sys/fs/zfs.h>
74 #include <sys/callb.h>
75 #include <sys/systeminfo.h>
76 #include <sys/spa_boot.h>
77 #include <sys/zfs_ioctl.h>
78 #include <sys/dsl_scan.h>
79 #include <sys/zfeature.h>
80 #include <sys/dsl_destroy.h>
84 #include <sys/bootprops.h>
85 #include <sys/callb.h>
86 #include <sys/cpupart.h>
88 #include <sys/sysdc.h>
93 #include "zfs_comutil.h"
96 * The interval, in seconds, at which failed configuration cache file writes
99 int zfs_ccw_retry_interval
= 300;
101 typedef enum zti_modes
{
102 ZTI_MODE_FIXED
, /* value is # of threads (min 1) */
103 ZTI_MODE_BATCH
, /* cpu-intensive; value is ignored */
104 ZTI_MODE_NULL
, /* don't create a taskq */
108 #define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) }
109 #define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 }
110 #define ZTI_NULL { ZTI_MODE_NULL, 0, 0 }
112 #define ZTI_N(n) ZTI_P(n, 1)
113 #define ZTI_ONE ZTI_N(1)
115 typedef struct zio_taskq_info
{
116 zti_modes_t zti_mode
;
121 static const char *const zio_taskq_types
[ZIO_TASKQ_TYPES
] = {
122 "issue", "issue_high", "intr", "intr_high"
126 * This table defines the taskq settings for each ZFS I/O type. When
127 * initializing a pool, we use this table to create an appropriately sized
128 * taskq. Some operations are low volume and therefore have a small, static
129 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE
130 * macros. Other operations process a large amount of data; the ZTI_BATCH
131 * macro causes us to create a taskq oriented for throughput. Some operations
132 * are so high frequency and short-lived that the taskq itself can become a a
133 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an
134 * additional degree of parallelism specified by the number of threads per-
135 * taskq and the number of taskqs; when dispatching an event in this case, the
136 * particular taskq is chosen at random.
138 * The different taskq priorities are to handle the different contexts (issue
139 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that
140 * need to be handled with minimum delay.
142 const zio_taskq_info_t zio_taskqs
[ZIO_TYPES
][ZIO_TASKQ_TYPES
] = {
143 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */
144 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* NULL */
145 { ZTI_N(8), ZTI_NULL
, ZTI_P(12, 8), ZTI_NULL
}, /* READ */
146 { ZTI_BATCH
, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */
147 { ZTI_P(12, 8), ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* FREE */
148 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* CLAIM */
149 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* IOCTL */
152 static void spa_sync_version(void *arg
, dmu_tx_t
*tx
);
153 static void spa_sync_props(void *arg
, dmu_tx_t
*tx
);
154 static boolean_t
spa_has_active_shared_spare(spa_t
*spa
);
155 static int spa_load_impl(spa_t
*spa
, spa_import_type_t type
, char **ereport
);
156 static void spa_vdev_resilver_done(spa_t
*spa
);
158 uint_t zio_taskq_batch_pct
= 75; /* 1 thread per cpu in pset */
159 id_t zio_taskq_psrset_bind
= PS_NONE
;
160 boolean_t zio_taskq_sysdc
= B_TRUE
; /* use SDC scheduling class */
161 uint_t zio_taskq_basedc
= 80; /* base duty cycle */
163 boolean_t spa_create_process
= B_TRUE
; /* no process ==> no sysdc */
164 extern int zfs_sync_pass_deferred_free
;
167 * Report any spa_load_verify errors found, but do not fail spa_load.
168 * This is used by zdb to analyze non-idle pools.
170 boolean_t spa_load_verify_dryrun
= B_FALSE
;
173 * This (illegal) pool name is used when temporarily importing a spa_t in order
174 * to get the vdev stats associated with the imported devices.
176 #define TRYIMPORT_NAME "$import"
179 * For debugging purposes: print out vdev tree during pool import.
181 boolean_t spa_load_print_vdev_tree
= B_FALSE
;
184 * A non-zero value for zfs_max_missing_tvds means that we allow importing
185 * pools with missing top-level vdevs. This is strictly intended for advanced
186 * pool recovery cases since missing data is almost inevitable. Pools with
187 * missing devices can only be imported read-only for safety reasons, and their
188 * fail-mode will be automatically set to "continue".
190 * With 1 missing vdev we should be able to import the pool and mount all
191 * datasets. User data that was not modified after the missing device has been
192 * added should be recoverable. This means that snapshots created prior to the
193 * addition of that device should be completely intact.
195 * With 2 missing vdevs, some datasets may fail to mount since there are
196 * dataset statistics that are stored as regular metadata. Some data might be
197 * recoverable if those vdevs were added recently.
199 * With 3 or more missing vdevs, the pool is severely damaged and MOS entries
200 * may be missing entirely. Chances of data recovery are very low. Note that
201 * there are also risks of performing an inadvertent rewind as we might be
202 * missing all the vdevs with the latest uberblocks.
204 uint64_t zfs_max_missing_tvds
= 0;
207 * The parameters below are similar to zfs_max_missing_tvds but are only
208 * intended for a preliminary open of the pool with an untrusted config which
209 * might be incomplete or out-dated.
211 * We are more tolerant for pools opened from a cachefile since we could have
212 * an out-dated cachefile where a device removal was not registered.
213 * We could have set the limit arbitrarily high but in the case where devices
214 * are really missing we would want to return the proper error codes; we chose
215 * SPA_DVAS_PER_BP - 1 so that some copies of the MOS would still be available
216 * and we get a chance to retrieve the trusted config.
218 uint64_t zfs_max_missing_tvds_cachefile
= SPA_DVAS_PER_BP
- 1;
221 * In the case where config was assembled by scanning device paths (/dev/dsks
222 * by default) we are less tolerant since all the existing devices should have
223 * been detected and we want spa_load to return the right error codes.
225 uint64_t zfs_max_missing_tvds_scan
= 0;
228 * Debugging aid that pauses spa_sync() towards the end.
230 boolean_t zfs_pause_spa_sync
= B_FALSE
;
233 * ==========================================================================
234 * SPA properties routines
235 * ==========================================================================
239 * Add a (source=src, propname=propval) list to an nvlist.
242 spa_prop_add_list(nvlist_t
*nvl
, zpool_prop_t prop
, char *strval
,
243 uint64_t intval
, zprop_source_t src
)
245 const char *propname
= zpool_prop_to_name(prop
);
248 VERIFY(nvlist_alloc(&propval
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
249 VERIFY(nvlist_add_uint64(propval
, ZPROP_SOURCE
, src
) == 0);
252 VERIFY(nvlist_add_string(propval
, ZPROP_VALUE
, strval
) == 0);
254 VERIFY(nvlist_add_uint64(propval
, ZPROP_VALUE
, intval
) == 0);
256 VERIFY(nvlist_add_nvlist(nvl
, propname
, propval
) == 0);
257 nvlist_free(propval
);
261 * Get property values from the spa configuration.
264 spa_prop_get_config(spa_t
*spa
, nvlist_t
**nvp
)
266 vdev_t
*rvd
= spa
->spa_root_vdev
;
267 dsl_pool_t
*pool
= spa
->spa_dsl_pool
;
268 uint64_t size
, alloc
, cap
, version
;
269 zprop_source_t src
= ZPROP_SRC_NONE
;
270 spa_config_dirent_t
*dp
;
271 metaslab_class_t
*mc
= spa_normal_class(spa
);
273 ASSERT(MUTEX_HELD(&spa
->spa_props_lock
));
276 alloc
= metaslab_class_get_alloc(spa_normal_class(spa
));
277 size
= metaslab_class_get_space(spa_normal_class(spa
));
278 spa_prop_add_list(*nvp
, ZPOOL_PROP_NAME
, spa_name(spa
), 0, src
);
279 spa_prop_add_list(*nvp
, ZPOOL_PROP_SIZE
, NULL
, size
, src
);
280 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALLOCATED
, NULL
, alloc
, src
);
281 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREE
, NULL
,
283 spa_prop_add_list(*nvp
, ZPOOL_PROP_CHECKPOINT
, NULL
,
284 spa
->spa_checkpoint_info
.sci_dspace
, src
);
286 spa_prop_add_list(*nvp
, ZPOOL_PROP_FRAGMENTATION
, NULL
,
287 metaslab_class_fragmentation(mc
), src
);
288 spa_prop_add_list(*nvp
, ZPOOL_PROP_EXPANDSZ
, NULL
,
289 metaslab_class_expandable_space(mc
), src
);
290 spa_prop_add_list(*nvp
, ZPOOL_PROP_READONLY
, NULL
,
291 (spa_mode(spa
) == FREAD
), src
);
293 cap
= (size
== 0) ? 0 : (alloc
* 100 / size
);
294 spa_prop_add_list(*nvp
, ZPOOL_PROP_CAPACITY
, NULL
, cap
, src
);
296 spa_prop_add_list(*nvp
, ZPOOL_PROP_DEDUPRATIO
, NULL
,
297 ddt_get_pool_dedup_ratio(spa
), src
);
299 spa_prop_add_list(*nvp
, ZPOOL_PROP_HEALTH
, NULL
,
300 rvd
->vdev_state
, src
);
302 version
= spa_version(spa
);
303 if (version
== zpool_prop_default_numeric(ZPOOL_PROP_VERSION
))
304 src
= ZPROP_SRC_DEFAULT
;
306 src
= ZPROP_SRC_LOCAL
;
307 spa_prop_add_list(*nvp
, ZPOOL_PROP_VERSION
, NULL
, version
, src
);
312 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS,
313 * when opening pools before this version freedir will be NULL.
315 if (pool
->dp_free_dir
!= NULL
) {
316 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREEING
, NULL
,
317 dsl_dir_phys(pool
->dp_free_dir
)->dd_used_bytes
,
320 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREEING
,
324 if (pool
->dp_leak_dir
!= NULL
) {
325 spa_prop_add_list(*nvp
, ZPOOL_PROP_LEAKED
, NULL
,
326 dsl_dir_phys(pool
->dp_leak_dir
)->dd_used_bytes
,
329 spa_prop_add_list(*nvp
, ZPOOL_PROP_LEAKED
,
334 spa_prop_add_list(*nvp
, ZPOOL_PROP_GUID
, NULL
, spa_guid(spa
), src
);
336 if (spa
->spa_comment
!= NULL
) {
337 spa_prop_add_list(*nvp
, ZPOOL_PROP_COMMENT
, spa
->spa_comment
,
341 if (spa
->spa_root
!= NULL
)
342 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALTROOT
, spa
->spa_root
,
345 if (spa_feature_is_enabled(spa
, SPA_FEATURE_LARGE_BLOCKS
)) {
346 spa_prop_add_list(*nvp
, ZPOOL_PROP_MAXBLOCKSIZE
, NULL
,
347 MIN(zfs_max_recordsize
, SPA_MAXBLOCKSIZE
), ZPROP_SRC_NONE
);
349 spa_prop_add_list(*nvp
, ZPOOL_PROP_MAXBLOCKSIZE
, NULL
,
350 SPA_OLD_MAXBLOCKSIZE
, ZPROP_SRC_NONE
);
353 if ((dp
= list_head(&spa
->spa_config_list
)) != NULL
) {
354 if (dp
->scd_path
== NULL
) {
355 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
356 "none", 0, ZPROP_SRC_LOCAL
);
357 } else if (strcmp(dp
->scd_path
, spa_config_path
) != 0) {
358 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
359 dp
->scd_path
, 0, ZPROP_SRC_LOCAL
);
365 * Get zpool property values.
368 spa_prop_get(spa_t
*spa
, nvlist_t
**nvp
)
370 objset_t
*mos
= spa
->spa_meta_objset
;
375 VERIFY(nvlist_alloc(nvp
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
377 mutex_enter(&spa
->spa_props_lock
);
380 * Get properties from the spa config.
382 spa_prop_get_config(spa
, nvp
);
384 /* If no pool property object, no more prop to get. */
385 if (mos
== NULL
|| spa
->spa_pool_props_object
== 0) {
386 mutex_exit(&spa
->spa_props_lock
);
391 * Get properties from the MOS pool property object.
393 for (zap_cursor_init(&zc
, mos
, spa
->spa_pool_props_object
);
394 (err
= zap_cursor_retrieve(&zc
, &za
)) == 0;
395 zap_cursor_advance(&zc
)) {
398 zprop_source_t src
= ZPROP_SRC_DEFAULT
;
401 if ((prop
= zpool_name_to_prop(za
.za_name
)) == ZPOOL_PROP_INVAL
)
404 switch (za
.za_integer_length
) {
406 /* integer property */
407 if (za
.za_first_integer
!=
408 zpool_prop_default_numeric(prop
))
409 src
= ZPROP_SRC_LOCAL
;
411 if (prop
== ZPOOL_PROP_BOOTFS
) {
413 dsl_dataset_t
*ds
= NULL
;
415 dp
= spa_get_dsl(spa
);
416 dsl_pool_config_enter(dp
, FTAG
);
417 err
= dsl_dataset_hold_obj(dp
,
418 za
.za_first_integer
, FTAG
, &ds
);
420 dsl_pool_config_exit(dp
, FTAG
);
424 strval
= kmem_alloc(ZFS_MAX_DATASET_NAME_LEN
,
426 dsl_dataset_name(ds
, strval
);
427 dsl_dataset_rele(ds
, FTAG
);
428 dsl_pool_config_exit(dp
, FTAG
);
431 intval
= za
.za_first_integer
;
434 spa_prop_add_list(*nvp
, prop
, strval
, intval
, src
);
437 kmem_free(strval
, ZFS_MAX_DATASET_NAME_LEN
);
442 /* string property */
443 strval
= kmem_alloc(za
.za_num_integers
, KM_SLEEP
);
444 err
= zap_lookup(mos
, spa
->spa_pool_props_object
,
445 za
.za_name
, 1, za
.za_num_integers
, strval
);
447 kmem_free(strval
, za
.za_num_integers
);
450 spa_prop_add_list(*nvp
, prop
, strval
, 0, src
);
451 kmem_free(strval
, za
.za_num_integers
);
458 zap_cursor_fini(&zc
);
459 mutex_exit(&spa
->spa_props_lock
);
461 if (err
&& err
!= ENOENT
) {
471 * Validate the given pool properties nvlist and modify the list
472 * for the property values to be set.
475 spa_prop_validate(spa_t
*spa
, nvlist_t
*props
)
478 int error
= 0, reset_bootfs
= 0;
480 boolean_t has_feature
= B_FALSE
;
483 while ((elem
= nvlist_next_nvpair(props
, elem
)) != NULL
) {
485 char *strval
, *slash
, *check
, *fname
;
486 const char *propname
= nvpair_name(elem
);
487 zpool_prop_t prop
= zpool_name_to_prop(propname
);
490 case ZPOOL_PROP_INVAL
:
491 if (!zpool_prop_feature(propname
)) {
492 error
= SET_ERROR(EINVAL
);
497 * Sanitize the input.
499 if (nvpair_type(elem
) != DATA_TYPE_UINT64
) {
500 error
= SET_ERROR(EINVAL
);
504 if (nvpair_value_uint64(elem
, &intval
) != 0) {
505 error
= SET_ERROR(EINVAL
);
510 error
= SET_ERROR(EINVAL
);
514 fname
= strchr(propname
, '@') + 1;
515 if (zfeature_lookup_name(fname
, NULL
) != 0) {
516 error
= SET_ERROR(EINVAL
);
520 has_feature
= B_TRUE
;
523 case ZPOOL_PROP_VERSION
:
524 error
= nvpair_value_uint64(elem
, &intval
);
526 (intval
< spa_version(spa
) ||
527 intval
> SPA_VERSION_BEFORE_FEATURES
||
529 error
= SET_ERROR(EINVAL
);
532 case ZPOOL_PROP_DELEGATION
:
533 case ZPOOL_PROP_AUTOREPLACE
:
534 case ZPOOL_PROP_LISTSNAPS
:
535 case ZPOOL_PROP_AUTOEXPAND
:
536 error
= nvpair_value_uint64(elem
, &intval
);
537 if (!error
&& intval
> 1)
538 error
= SET_ERROR(EINVAL
);
541 case ZPOOL_PROP_BOOTFS
:
543 * If the pool version is less than SPA_VERSION_BOOTFS,
544 * or the pool is still being created (version == 0),
545 * the bootfs property cannot be set.
547 if (spa_version(spa
) < SPA_VERSION_BOOTFS
) {
548 error
= SET_ERROR(ENOTSUP
);
553 * Make sure the vdev config is bootable
555 if (!vdev_is_bootable(spa
->spa_root_vdev
)) {
556 error
= SET_ERROR(ENOTSUP
);
562 error
= nvpair_value_string(elem
, &strval
);
568 if (strval
== NULL
|| strval
[0] == '\0') {
569 objnum
= zpool_prop_default_numeric(
574 error
= dmu_objset_hold(strval
, FTAG
, &os
);
579 * Must be ZPL, and its property settings
580 * must be supported by GRUB (compression
581 * is not gzip, and large blocks are not used).
584 if (dmu_objset_type(os
) != DMU_OST_ZFS
) {
585 error
= SET_ERROR(ENOTSUP
);
587 dsl_prop_get_int_ds(dmu_objset_ds(os
),
588 zfs_prop_to_name(ZFS_PROP_COMPRESSION
),
590 !BOOTFS_COMPRESS_VALID(propval
)) {
591 error
= SET_ERROR(ENOTSUP
);
593 objnum
= dmu_objset_id(os
);
595 dmu_objset_rele(os
, FTAG
);
599 case ZPOOL_PROP_FAILUREMODE
:
600 error
= nvpair_value_uint64(elem
, &intval
);
601 if (!error
&& (intval
< ZIO_FAILURE_MODE_WAIT
||
602 intval
> ZIO_FAILURE_MODE_PANIC
))
603 error
= SET_ERROR(EINVAL
);
606 * This is a special case which only occurs when
607 * the pool has completely failed. This allows
608 * the user to change the in-core failmode property
609 * without syncing it out to disk (I/Os might
610 * currently be blocked). We do this by returning
611 * EIO to the caller (spa_prop_set) to trick it
612 * into thinking we encountered a property validation
615 if (!error
&& spa_suspended(spa
)) {
616 spa
->spa_failmode
= intval
;
617 error
= SET_ERROR(EIO
);
621 case ZPOOL_PROP_CACHEFILE
:
622 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
625 if (strval
[0] == '\0')
628 if (strcmp(strval
, "none") == 0)
631 if (strval
[0] != '/') {
632 error
= SET_ERROR(EINVAL
);
636 slash
= strrchr(strval
, '/');
637 ASSERT(slash
!= NULL
);
639 if (slash
[1] == '\0' || strcmp(slash
, "/.") == 0 ||
640 strcmp(slash
, "/..") == 0)
641 error
= SET_ERROR(EINVAL
);
644 case ZPOOL_PROP_COMMENT
:
645 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
647 for (check
= strval
; *check
!= '\0'; check
++) {
649 * The kernel doesn't have an easy isprint()
650 * check. For this kernel check, we merely
651 * check ASCII apart from DEL. Fix this if
652 * there is an easy-to-use kernel isprint().
654 if (*check
>= 0x7f) {
655 error
= SET_ERROR(EINVAL
);
659 if (strlen(strval
) > ZPROP_MAX_COMMENT
)
663 case ZPOOL_PROP_DEDUPDITTO
:
664 if (spa_version(spa
) < SPA_VERSION_DEDUP
)
665 error
= SET_ERROR(ENOTSUP
);
667 error
= nvpair_value_uint64(elem
, &intval
);
669 intval
!= 0 && intval
< ZIO_DEDUPDITTO_MIN
)
670 error
= SET_ERROR(EINVAL
);
678 if (!error
&& reset_bootfs
) {
679 error
= nvlist_remove(props
,
680 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), DATA_TYPE_STRING
);
683 error
= nvlist_add_uint64(props
,
684 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), objnum
);
692 spa_configfile_set(spa_t
*spa
, nvlist_t
*nvp
, boolean_t need_sync
)
695 spa_config_dirent_t
*dp
;
697 if (nvlist_lookup_string(nvp
, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE
),
701 dp
= kmem_alloc(sizeof (spa_config_dirent_t
),
704 if (cachefile
[0] == '\0')
705 dp
->scd_path
= spa_strdup(spa_config_path
);
706 else if (strcmp(cachefile
, "none") == 0)
709 dp
->scd_path
= spa_strdup(cachefile
);
711 list_insert_head(&spa
->spa_config_list
, dp
);
713 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
717 spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
)
720 nvpair_t
*elem
= NULL
;
721 boolean_t need_sync
= B_FALSE
;
723 if ((error
= spa_prop_validate(spa
, nvp
)) != 0)
726 while ((elem
= nvlist_next_nvpair(nvp
, elem
)) != NULL
) {
727 zpool_prop_t prop
= zpool_name_to_prop(nvpair_name(elem
));
729 if (prop
== ZPOOL_PROP_CACHEFILE
||
730 prop
== ZPOOL_PROP_ALTROOT
||
731 prop
== ZPOOL_PROP_READONLY
)
734 if (prop
== ZPOOL_PROP_VERSION
|| prop
== ZPOOL_PROP_INVAL
) {
737 if (prop
== ZPOOL_PROP_VERSION
) {
738 VERIFY(nvpair_value_uint64(elem
, &ver
) == 0);
740 ASSERT(zpool_prop_feature(nvpair_name(elem
)));
741 ver
= SPA_VERSION_FEATURES
;
745 /* Save time if the version is already set. */
746 if (ver
== spa_version(spa
))
750 * In addition to the pool directory object, we might
751 * create the pool properties object, the features for
752 * read object, the features for write object, or the
753 * feature descriptions object.
755 error
= dsl_sync_task(spa
->spa_name
, NULL
,
756 spa_sync_version
, &ver
,
757 6, ZFS_SPACE_CHECK_RESERVED
);
768 return (dsl_sync_task(spa
->spa_name
, NULL
, spa_sync_props
,
769 nvp
, 6, ZFS_SPACE_CHECK_RESERVED
));
776 * If the bootfs property value is dsobj, clear it.
779 spa_prop_clear_bootfs(spa_t
*spa
, uint64_t dsobj
, dmu_tx_t
*tx
)
781 if (spa
->spa_bootfs
== dsobj
&& spa
->spa_pool_props_object
!= 0) {
782 VERIFY(zap_remove(spa
->spa_meta_objset
,
783 spa
->spa_pool_props_object
,
784 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), tx
) == 0);
791 spa_change_guid_check(void *arg
, dmu_tx_t
*tx
)
793 uint64_t *newguid
= arg
;
794 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
795 vdev_t
*rvd
= spa
->spa_root_vdev
;
798 if (spa_feature_is_active(spa
, SPA_FEATURE_POOL_CHECKPOINT
)) {
799 int error
= (spa_has_checkpoint(spa
)) ?
800 ZFS_ERR_CHECKPOINT_EXISTS
: ZFS_ERR_DISCARDING_CHECKPOINT
;
801 return (SET_ERROR(error
));
804 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
805 vdev_state
= rvd
->vdev_state
;
806 spa_config_exit(spa
, SCL_STATE
, FTAG
);
808 if (vdev_state
!= VDEV_STATE_HEALTHY
)
809 return (SET_ERROR(ENXIO
));
811 ASSERT3U(spa_guid(spa
), !=, *newguid
);
817 spa_change_guid_sync(void *arg
, dmu_tx_t
*tx
)
819 uint64_t *newguid
= arg
;
820 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
822 vdev_t
*rvd
= spa
->spa_root_vdev
;
824 oldguid
= spa_guid(spa
);
826 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
827 rvd
->vdev_guid
= *newguid
;
828 rvd
->vdev_guid_sum
+= (*newguid
- oldguid
);
829 vdev_config_dirty(rvd
);
830 spa_config_exit(spa
, SCL_STATE
, FTAG
);
832 spa_history_log_internal(spa
, "guid change", tx
, "old=%llu new=%llu",
837 * Change the GUID for the pool. This is done so that we can later
838 * re-import a pool built from a clone of our own vdevs. We will modify
839 * the root vdev's guid, our own pool guid, and then mark all of our
840 * vdevs dirty. Note that we must make sure that all our vdevs are
841 * online when we do this, or else any vdevs that weren't present
842 * would be orphaned from our pool. We are also going to issue a
843 * sysevent to update any watchers.
846 spa_change_guid(spa_t
*spa
)
851 mutex_enter(&spa
->spa_vdev_top_lock
);
852 mutex_enter(&spa_namespace_lock
);
853 guid
= spa_generate_guid(NULL
);
855 error
= dsl_sync_task(spa
->spa_name
, spa_change_guid_check
,
856 spa_change_guid_sync
, &guid
, 5, ZFS_SPACE_CHECK_RESERVED
);
859 spa_write_cachefile(spa
, B_FALSE
, B_TRUE
);
860 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_POOL_REGUID
);
863 mutex_exit(&spa_namespace_lock
);
864 mutex_exit(&spa
->spa_vdev_top_lock
);
870 * ==========================================================================
871 * SPA state manipulation (open/create/destroy/import/export)
872 * ==========================================================================
876 spa_error_entry_compare(const void *a
, const void *b
)
878 spa_error_entry_t
*sa
= (spa_error_entry_t
*)a
;
879 spa_error_entry_t
*sb
= (spa_error_entry_t
*)b
;
882 ret
= bcmp(&sa
->se_bookmark
, &sb
->se_bookmark
,
883 sizeof (zbookmark_phys_t
));
894 * Utility function which retrieves copies of the current logs and
895 * re-initializes them in the process.
898 spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
)
900 ASSERT(MUTEX_HELD(&spa
->spa_errlist_lock
));
902 bcopy(&spa
->spa_errlist_last
, last
, sizeof (avl_tree_t
));
903 bcopy(&spa
->spa_errlist_scrub
, scrub
, sizeof (avl_tree_t
));
905 avl_create(&spa
->spa_errlist_scrub
,
906 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
907 offsetof(spa_error_entry_t
, se_avl
));
908 avl_create(&spa
->spa_errlist_last
,
909 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
910 offsetof(spa_error_entry_t
, se_avl
));
914 spa_taskqs_init(spa_t
*spa
, zio_type_t t
, zio_taskq_type_t q
)
916 const zio_taskq_info_t
*ztip
= &zio_taskqs
[t
][q
];
917 enum zti_modes mode
= ztip
->zti_mode
;
918 uint_t value
= ztip
->zti_value
;
919 uint_t count
= ztip
->zti_count
;
920 spa_taskqs_t
*tqs
= &spa
->spa_zio_taskq
[t
][q
];
923 boolean_t batch
= B_FALSE
;
925 if (mode
== ZTI_MODE_NULL
) {
927 tqs
->stqs_taskq
= NULL
;
931 ASSERT3U(count
, >, 0);
933 tqs
->stqs_count
= count
;
934 tqs
->stqs_taskq
= kmem_alloc(count
* sizeof (taskq_t
*), KM_SLEEP
);
938 ASSERT3U(value
, >=, 1);
939 value
= MAX(value
, 1);
944 flags
|= TASKQ_THREADS_CPU_PCT
;
945 value
= zio_taskq_batch_pct
;
949 panic("unrecognized mode for %s_%s taskq (%u:%u) in "
951 zio_type_name
[t
], zio_taskq_types
[q
], mode
, value
);
955 for (uint_t i
= 0; i
< count
; i
++) {
959 (void) snprintf(name
, sizeof (name
), "%s_%s_%u",
960 zio_type_name
[t
], zio_taskq_types
[q
], i
);
962 (void) snprintf(name
, sizeof (name
), "%s_%s",
963 zio_type_name
[t
], zio_taskq_types
[q
]);
966 if (zio_taskq_sysdc
&& spa
->spa_proc
!= &p0
) {
968 flags
|= TASKQ_DC_BATCH
;
970 tq
= taskq_create_sysdc(name
, value
, 50, INT_MAX
,
971 spa
->spa_proc
, zio_taskq_basedc
, flags
);
973 pri_t pri
= maxclsyspri
;
975 * The write issue taskq can be extremely CPU
976 * intensive. Run it at slightly lower priority
977 * than the other taskqs.
979 if (t
== ZIO_TYPE_WRITE
&& q
== ZIO_TASKQ_ISSUE
)
982 tq
= taskq_create_proc(name
, value
, pri
, 50,
983 INT_MAX
, spa
->spa_proc
, flags
);
986 tqs
->stqs_taskq
[i
] = tq
;
991 spa_taskqs_fini(spa_t
*spa
, zio_type_t t
, zio_taskq_type_t q
)
993 spa_taskqs_t
*tqs
= &spa
->spa_zio_taskq
[t
][q
];
995 if (tqs
->stqs_taskq
== NULL
) {
996 ASSERT0(tqs
->stqs_count
);
1000 for (uint_t i
= 0; i
< tqs
->stqs_count
; i
++) {
1001 ASSERT3P(tqs
->stqs_taskq
[i
], !=, NULL
);
1002 taskq_destroy(tqs
->stqs_taskq
[i
]);
1005 kmem_free(tqs
->stqs_taskq
, tqs
->stqs_count
* sizeof (taskq_t
*));
1006 tqs
->stqs_taskq
= NULL
;
1010 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority.
1011 * Note that a type may have multiple discrete taskqs to avoid lock contention
1012 * on the taskq itself. In that case we choose which taskq at random by using
1013 * the low bits of gethrtime().
1016 spa_taskq_dispatch_ent(spa_t
*spa
, zio_type_t t
, zio_taskq_type_t q
,
1017 task_func_t
*func
, void *arg
, uint_t flags
, taskq_ent_t
*ent
)
1019 spa_taskqs_t
*tqs
= &spa
->spa_zio_taskq
[t
][q
];
1022 ASSERT3P(tqs
->stqs_taskq
, !=, NULL
);
1023 ASSERT3U(tqs
->stqs_count
, !=, 0);
1025 if (tqs
->stqs_count
== 1) {
1026 tq
= tqs
->stqs_taskq
[0];
1028 tq
= tqs
->stqs_taskq
[gethrtime() % tqs
->stqs_count
];
1031 taskq_dispatch_ent(tq
, func
, arg
, flags
, ent
);
1035 spa_create_zio_taskqs(spa_t
*spa
)
1037 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
1038 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
1039 spa_taskqs_init(spa
, t
, q
);
1046 spa_thread(void *arg
)
1048 callb_cpr_t cprinfo
;
1051 user_t
*pu
= PTOU(curproc
);
1053 CALLB_CPR_INIT(&cprinfo
, &spa
->spa_proc_lock
, callb_generic_cpr
,
1056 ASSERT(curproc
!= &p0
);
1057 (void) snprintf(pu
->u_psargs
, sizeof (pu
->u_psargs
),
1058 "zpool-%s", spa
->spa_name
);
1059 (void) strlcpy(pu
->u_comm
, pu
->u_psargs
, sizeof (pu
->u_comm
));
1061 /* bind this thread to the requested psrset */
1062 if (zio_taskq_psrset_bind
!= PS_NONE
) {
1064 mutex_enter(&cpu_lock
);
1065 mutex_enter(&pidlock
);
1066 mutex_enter(&curproc
->p_lock
);
1068 if (cpupart_bind_thread(curthread
, zio_taskq_psrset_bind
,
1069 0, NULL
, NULL
) == 0) {
1070 curthread
->t_bind_pset
= zio_taskq_psrset_bind
;
1073 "Couldn't bind process for zfs pool \"%s\" to "
1074 "pset %d\n", spa
->spa_name
, zio_taskq_psrset_bind
);
1077 mutex_exit(&curproc
->p_lock
);
1078 mutex_exit(&pidlock
);
1079 mutex_exit(&cpu_lock
);
1083 if (zio_taskq_sysdc
) {
1084 sysdc_thread_enter(curthread
, 100, 0);
1087 spa
->spa_proc
= curproc
;
1088 spa
->spa_did
= curthread
->t_did
;
1090 spa_create_zio_taskqs(spa
);
1092 mutex_enter(&spa
->spa_proc_lock
);
1093 ASSERT(spa
->spa_proc_state
== SPA_PROC_CREATED
);
1095 spa
->spa_proc_state
= SPA_PROC_ACTIVE
;
1096 cv_broadcast(&spa
->spa_proc_cv
);
1098 CALLB_CPR_SAFE_BEGIN(&cprinfo
);
1099 while (spa
->spa_proc_state
== SPA_PROC_ACTIVE
)
1100 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
1101 CALLB_CPR_SAFE_END(&cprinfo
, &spa
->spa_proc_lock
);
1103 ASSERT(spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
);
1104 spa
->spa_proc_state
= SPA_PROC_GONE
;
1105 spa
->spa_proc
= &p0
;
1106 cv_broadcast(&spa
->spa_proc_cv
);
1107 CALLB_CPR_EXIT(&cprinfo
); /* drops spa_proc_lock */
1109 mutex_enter(&curproc
->p_lock
);
1115 * Activate an uninitialized pool.
1118 spa_activate(spa_t
*spa
, int mode
)
1120 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
1122 spa
->spa_state
= POOL_STATE_ACTIVE
;
1123 spa
->spa_mode
= mode
;
1125 spa
->spa_normal_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
1126 spa
->spa_log_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
1128 /* Try to create a covering process */
1129 mutex_enter(&spa
->spa_proc_lock
);
1130 ASSERT(spa
->spa_proc_state
== SPA_PROC_NONE
);
1131 ASSERT(spa
->spa_proc
== &p0
);
1134 /* Only create a process if we're going to be around a while. */
1135 if (spa_create_process
&& strcmp(spa
->spa_name
, TRYIMPORT_NAME
) != 0) {
1136 if (newproc(spa_thread
, (caddr_t
)spa
, syscid
, maxclsyspri
,
1138 spa
->spa_proc_state
= SPA_PROC_CREATED
;
1139 while (spa
->spa_proc_state
== SPA_PROC_CREATED
) {
1140 cv_wait(&spa
->spa_proc_cv
,
1141 &spa
->spa_proc_lock
);
1143 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
1144 ASSERT(spa
->spa_proc
!= &p0
);
1145 ASSERT(spa
->spa_did
!= 0);
1149 "Couldn't create process for zfs pool \"%s\"\n",
1154 mutex_exit(&spa
->spa_proc_lock
);
1156 /* If we didn't create a process, we need to create our taskqs. */
1157 if (spa
->spa_proc
== &p0
) {
1158 spa_create_zio_taskqs(spa
);
1161 for (size_t i
= 0; i
< TXG_SIZE
; i
++) {
1162 spa
->spa_txg_zio
[i
] = zio_root(spa
, NULL
, NULL
,
1166 list_create(&spa
->spa_config_dirty_list
, sizeof (vdev_t
),
1167 offsetof(vdev_t
, vdev_config_dirty_node
));
1168 list_create(&spa
->spa_evicting_os_list
, sizeof (objset_t
),
1169 offsetof(objset_t
, os_evicting_node
));
1170 list_create(&spa
->spa_state_dirty_list
, sizeof (vdev_t
),
1171 offsetof(vdev_t
, vdev_state_dirty_node
));
1173 txg_list_create(&spa
->spa_vdev_txg_list
, spa
,
1174 offsetof(struct vdev
, vdev_txg_node
));
1176 avl_create(&spa
->spa_errlist_scrub
,
1177 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
1178 offsetof(spa_error_entry_t
, se_avl
));
1179 avl_create(&spa
->spa_errlist_last
,
1180 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
1181 offsetof(spa_error_entry_t
, se_avl
));
1185 * Opposite of spa_activate().
1188 spa_deactivate(spa_t
*spa
)
1190 ASSERT(spa
->spa_sync_on
== B_FALSE
);
1191 ASSERT(spa
->spa_dsl_pool
== NULL
);
1192 ASSERT(spa
->spa_root_vdev
== NULL
);
1193 ASSERT(spa
->spa_async_zio_root
== NULL
);
1194 ASSERT(spa
->spa_state
!= POOL_STATE_UNINITIALIZED
);
1196 spa_evicting_os_wait(spa
);
1198 txg_list_destroy(&spa
->spa_vdev_txg_list
);
1200 list_destroy(&spa
->spa_config_dirty_list
);
1201 list_destroy(&spa
->spa_evicting_os_list
);
1202 list_destroy(&spa
->spa_state_dirty_list
);
1204 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
1205 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
1206 spa_taskqs_fini(spa
, t
, q
);
1210 for (size_t i
= 0; i
< TXG_SIZE
; i
++) {
1211 ASSERT3P(spa
->spa_txg_zio
[i
], !=, NULL
);
1212 VERIFY0(zio_wait(spa
->spa_txg_zio
[i
]));
1213 spa
->spa_txg_zio
[i
] = NULL
;
1216 metaslab_class_destroy(spa
->spa_normal_class
);
1217 spa
->spa_normal_class
= NULL
;
1219 metaslab_class_destroy(spa
->spa_log_class
);
1220 spa
->spa_log_class
= NULL
;
1223 * If this was part of an import or the open otherwise failed, we may
1224 * still have errors left in the queues. Empty them just in case.
1226 spa_errlog_drain(spa
);
1228 avl_destroy(&spa
->spa_errlist_scrub
);
1229 avl_destroy(&spa
->spa_errlist_last
);
1231 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
1233 mutex_enter(&spa
->spa_proc_lock
);
1234 if (spa
->spa_proc_state
!= SPA_PROC_NONE
) {
1235 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
1236 spa
->spa_proc_state
= SPA_PROC_DEACTIVATE
;
1237 cv_broadcast(&spa
->spa_proc_cv
);
1238 while (spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
) {
1239 ASSERT(spa
->spa_proc
!= &p0
);
1240 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
1242 ASSERT(spa
->spa_proc_state
== SPA_PROC_GONE
);
1243 spa
->spa_proc_state
= SPA_PROC_NONE
;
1245 ASSERT(spa
->spa_proc
== &p0
);
1246 mutex_exit(&spa
->spa_proc_lock
);
1249 * We want to make sure spa_thread() has actually exited the ZFS
1250 * module, so that the module can't be unloaded out from underneath
1253 if (spa
->spa_did
!= 0) {
1254 thread_join(spa
->spa_did
);
1260 * Verify a pool configuration, and construct the vdev tree appropriately. This
1261 * will create all the necessary vdevs in the appropriate layout, with each vdev
1262 * in the CLOSED state. This will prep the pool before open/creation/import.
1263 * All vdev validation is done by the vdev_alloc() routine.
1266 spa_config_parse(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
,
1267 uint_t id
, int atype
)
1273 if ((error
= vdev_alloc(spa
, vdp
, nv
, parent
, id
, atype
)) != 0)
1276 if ((*vdp
)->vdev_ops
->vdev_op_leaf
)
1279 error
= nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
1282 if (error
== ENOENT
)
1288 return (SET_ERROR(EINVAL
));
1291 for (int c
= 0; c
< children
; c
++) {
1293 if ((error
= spa_config_parse(spa
, &vd
, child
[c
], *vdp
, c
,
1301 ASSERT(*vdp
!= NULL
);
1307 * Opposite of spa_load().
1310 spa_unload(spa_t
*spa
)
1314 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1316 spa_load_note(spa
, "UNLOADING");
1321 spa_async_suspend(spa
);
1323 if (spa
->spa_root_vdev
) {
1324 vdev_initialize_stop_all(spa
->spa_root_vdev
,
1325 VDEV_INITIALIZE_ACTIVE
);
1331 if (spa
->spa_sync_on
) {
1332 txg_sync_stop(spa
->spa_dsl_pool
);
1333 spa
->spa_sync_on
= B_FALSE
;
1337 * Even though vdev_free() also calls vdev_metaslab_fini, we need
1338 * to call it earlier, before we wait for async i/o to complete.
1339 * This ensures that there is no async metaslab prefetching, by
1340 * calling taskq_wait(mg_taskq).
1342 if (spa
->spa_root_vdev
!= NULL
) {
1343 spa_config_enter(spa
, SCL_ALL
, spa
, RW_WRITER
);
1344 for (int c
= 0; c
< spa
->spa_root_vdev
->vdev_children
; c
++)
1345 vdev_metaslab_fini(spa
->spa_root_vdev
->vdev_child
[c
]);
1346 spa_config_exit(spa
, SCL_ALL
, spa
);
1350 * Wait for any outstanding async I/O to complete.
1352 if (spa
->spa_async_zio_root
!= NULL
) {
1353 for (int i
= 0; i
< max_ncpus
; i
++)
1354 (void) zio_wait(spa
->spa_async_zio_root
[i
]);
1355 kmem_free(spa
->spa_async_zio_root
, max_ncpus
* sizeof (void *));
1356 spa
->spa_async_zio_root
= NULL
;
1359 if (spa
->spa_vdev_removal
!= NULL
) {
1360 spa_vdev_removal_destroy(spa
->spa_vdev_removal
);
1361 spa
->spa_vdev_removal
= NULL
;
1364 if (spa
->spa_condense_zthr
!= NULL
) {
1365 ASSERT(!zthr_isrunning(spa
->spa_condense_zthr
));
1366 zthr_destroy(spa
->spa_condense_zthr
);
1367 spa
->spa_condense_zthr
= NULL
;
1370 if (spa
->spa_checkpoint_discard_zthr
!= NULL
) {
1371 ASSERT(!zthr_isrunning(spa
->spa_checkpoint_discard_zthr
));
1372 zthr_destroy(spa
->spa_checkpoint_discard_zthr
);
1373 spa
->spa_checkpoint_discard_zthr
= NULL
;
1376 spa_condense_fini(spa
);
1378 bpobj_close(&spa
->spa_deferred_bpobj
);
1380 spa_config_enter(spa
, SCL_ALL
, spa
, RW_WRITER
);
1385 if (spa
->spa_root_vdev
)
1386 vdev_free(spa
->spa_root_vdev
);
1387 ASSERT(spa
->spa_root_vdev
== NULL
);
1390 * Close the dsl pool.
1392 if (spa
->spa_dsl_pool
) {
1393 dsl_pool_close(spa
->spa_dsl_pool
);
1394 spa
->spa_dsl_pool
= NULL
;
1395 spa
->spa_meta_objset
= NULL
;
1401 * Drop and purge level 2 cache
1403 spa_l2cache_drop(spa
);
1405 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1406 vdev_free(spa
->spa_spares
.sav_vdevs
[i
]);
1407 if (spa
->spa_spares
.sav_vdevs
) {
1408 kmem_free(spa
->spa_spares
.sav_vdevs
,
1409 spa
->spa_spares
.sav_count
* sizeof (void *));
1410 spa
->spa_spares
.sav_vdevs
= NULL
;
1412 if (spa
->spa_spares
.sav_config
) {
1413 nvlist_free(spa
->spa_spares
.sav_config
);
1414 spa
->spa_spares
.sav_config
= NULL
;
1416 spa
->spa_spares
.sav_count
= 0;
1418 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
1419 vdev_clear_stats(spa
->spa_l2cache
.sav_vdevs
[i
]);
1420 vdev_free(spa
->spa_l2cache
.sav_vdevs
[i
]);
1422 if (spa
->spa_l2cache
.sav_vdevs
) {
1423 kmem_free(spa
->spa_l2cache
.sav_vdevs
,
1424 spa
->spa_l2cache
.sav_count
* sizeof (void *));
1425 spa
->spa_l2cache
.sav_vdevs
= NULL
;
1427 if (spa
->spa_l2cache
.sav_config
) {
1428 nvlist_free(spa
->spa_l2cache
.sav_config
);
1429 spa
->spa_l2cache
.sav_config
= NULL
;
1431 spa
->spa_l2cache
.sav_count
= 0;
1433 spa
->spa_async_suspended
= 0;
1435 spa
->spa_indirect_vdevs_loaded
= B_FALSE
;
1437 if (spa
->spa_comment
!= NULL
) {
1438 spa_strfree(spa
->spa_comment
);
1439 spa
->spa_comment
= NULL
;
1442 spa_config_exit(spa
, SCL_ALL
, spa
);
1446 * Load (or re-load) the current list of vdevs describing the active spares for
1447 * this pool. When this is called, we have some form of basic information in
1448 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1449 * then re-generate a more complete list including status information.
1452 spa_load_spares(spa_t
*spa
)
1461 * zdb opens both the current state of the pool and the
1462 * checkpointed state (if present), with a different spa_t.
1464 * As spare vdevs are shared among open pools, we skip loading
1465 * them when we load the checkpointed state of the pool.
1467 if (!spa_writeable(spa
))
1471 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1474 * First, close and free any existing spare vdevs.
1476 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1477 vd
= spa
->spa_spares
.sav_vdevs
[i
];
1479 /* Undo the call to spa_activate() below */
1480 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1481 B_FALSE
)) != NULL
&& tvd
->vdev_isspare
)
1482 spa_spare_remove(tvd
);
1487 if (spa
->spa_spares
.sav_vdevs
)
1488 kmem_free(spa
->spa_spares
.sav_vdevs
,
1489 spa
->spa_spares
.sav_count
* sizeof (void *));
1491 if (spa
->spa_spares
.sav_config
== NULL
)
1494 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
1495 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
1497 spa
->spa_spares
.sav_count
= (int)nspares
;
1498 spa
->spa_spares
.sav_vdevs
= NULL
;
1504 * Construct the array of vdevs, opening them to get status in the
1505 * process. For each spare, there is potentially two different vdev_t
1506 * structures associated with it: one in the list of spares (used only
1507 * for basic validation purposes) and one in the active vdev
1508 * configuration (if it's spared in). During this phase we open and
1509 * validate each vdev on the spare list. If the vdev also exists in the
1510 * active configuration, then we also mark this vdev as an active spare.
1512 spa
->spa_spares
.sav_vdevs
= kmem_alloc(nspares
* sizeof (void *),
1514 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1515 VERIFY(spa_config_parse(spa
, &vd
, spares
[i
], NULL
, 0,
1516 VDEV_ALLOC_SPARE
) == 0);
1519 spa
->spa_spares
.sav_vdevs
[i
] = vd
;
1521 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1522 B_FALSE
)) != NULL
) {
1523 if (!tvd
->vdev_isspare
)
1527 * We only mark the spare active if we were successfully
1528 * able to load the vdev. Otherwise, importing a pool
1529 * with a bad active spare would result in strange
1530 * behavior, because multiple pool would think the spare
1531 * is actively in use.
1533 * There is a vulnerability here to an equally bizarre
1534 * circumstance, where a dead active spare is later
1535 * brought back to life (onlined or otherwise). Given
1536 * the rarity of this scenario, and the extra complexity
1537 * it adds, we ignore the possibility.
1539 if (!vdev_is_dead(tvd
))
1540 spa_spare_activate(tvd
);
1544 vd
->vdev_aux
= &spa
->spa_spares
;
1546 if (vdev_open(vd
) != 0)
1549 if (vdev_validate_aux(vd
) == 0)
1554 * Recompute the stashed list of spares, with status information
1557 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
, ZPOOL_CONFIG_SPARES
,
1558 DATA_TYPE_NVLIST_ARRAY
) == 0);
1560 spares
= kmem_alloc(spa
->spa_spares
.sav_count
* sizeof (void *),
1562 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1563 spares
[i
] = vdev_config_generate(spa
,
1564 spa
->spa_spares
.sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_SPARE
);
1565 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
1566 ZPOOL_CONFIG_SPARES
, spares
, spa
->spa_spares
.sav_count
) == 0);
1567 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1568 nvlist_free(spares
[i
]);
1569 kmem_free(spares
, spa
->spa_spares
.sav_count
* sizeof (void *));
1573 * Load (or re-load) the current list of vdevs describing the active l2cache for
1574 * this pool. When this is called, we have some form of basic information in
1575 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1576 * then re-generate a more complete list including status information.
1577 * Devices which are already active have their details maintained, and are
1581 spa_load_l2cache(spa_t
*spa
)
1585 int i
, j
, oldnvdevs
;
1587 vdev_t
*vd
, **oldvdevs
, **newvdevs
;
1588 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
1592 * zdb opens both the current state of the pool and the
1593 * checkpointed state (if present), with a different spa_t.
1595 * As L2 caches are part of the ARC which is shared among open
1596 * pools, we skip loading them when we load the checkpointed
1597 * state of the pool.
1599 if (!spa_writeable(spa
))
1603 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1605 if (sav
->sav_config
!= NULL
) {
1606 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
1607 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
1608 newvdevs
= kmem_alloc(nl2cache
* sizeof (void *), KM_SLEEP
);
1614 oldvdevs
= sav
->sav_vdevs
;
1615 oldnvdevs
= sav
->sav_count
;
1616 sav
->sav_vdevs
= NULL
;
1620 * Process new nvlist of vdevs.
1622 for (i
= 0; i
< nl2cache
; i
++) {
1623 VERIFY(nvlist_lookup_uint64(l2cache
[i
], ZPOOL_CONFIG_GUID
,
1627 for (j
= 0; j
< oldnvdevs
; j
++) {
1629 if (vd
!= NULL
&& guid
== vd
->vdev_guid
) {
1631 * Retain previous vdev for add/remove ops.
1639 if (newvdevs
[i
] == NULL
) {
1643 VERIFY(spa_config_parse(spa
, &vd
, l2cache
[i
], NULL
, 0,
1644 VDEV_ALLOC_L2CACHE
) == 0);
1649 * Commit this vdev as an l2cache device,
1650 * even if it fails to open.
1652 spa_l2cache_add(vd
);
1657 spa_l2cache_activate(vd
);
1659 if (vdev_open(vd
) != 0)
1662 (void) vdev_validate_aux(vd
);
1664 if (!vdev_is_dead(vd
))
1665 l2arc_add_vdev(spa
, vd
);
1670 * Purge vdevs that were dropped
1672 for (i
= 0; i
< oldnvdevs
; i
++) {
1677 ASSERT(vd
->vdev_isl2cache
);
1679 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
1680 pool
!= 0ULL && l2arc_vdev_present(vd
))
1681 l2arc_remove_vdev(vd
);
1682 vdev_clear_stats(vd
);
1688 kmem_free(oldvdevs
, oldnvdevs
* sizeof (void *));
1690 if (sav
->sav_config
== NULL
)
1693 sav
->sav_vdevs
= newvdevs
;
1694 sav
->sav_count
= (int)nl2cache
;
1697 * Recompute the stashed list of l2cache devices, with status
1698 * information this time.
1700 VERIFY(nvlist_remove(sav
->sav_config
, ZPOOL_CONFIG_L2CACHE
,
1701 DATA_TYPE_NVLIST_ARRAY
) == 0);
1703 l2cache
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
1704 for (i
= 0; i
< sav
->sav_count
; i
++)
1705 l2cache
[i
] = vdev_config_generate(spa
,
1706 sav
->sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_L2CACHE
);
1707 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
1708 ZPOOL_CONFIG_L2CACHE
, l2cache
, sav
->sav_count
) == 0);
1710 for (i
= 0; i
< sav
->sav_count
; i
++)
1711 nvlist_free(l2cache
[i
]);
1713 kmem_free(l2cache
, sav
->sav_count
* sizeof (void *));
1717 load_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
**value
)
1720 char *packed
= NULL
;
1725 error
= dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
);
1729 nvsize
= *(uint64_t *)db
->db_data
;
1730 dmu_buf_rele(db
, FTAG
);
1732 packed
= kmem_alloc(nvsize
, KM_SLEEP
);
1733 error
= dmu_read(spa
->spa_meta_objset
, obj
, 0, nvsize
, packed
,
1736 error
= nvlist_unpack(packed
, nvsize
, value
, 0);
1737 kmem_free(packed
, nvsize
);
1743 * Concrete top-level vdevs that are not missing and are not logs. At every
1744 * spa_sync we write new uberblocks to at least SPA_SYNC_MIN_VDEVS core tvds.
1747 spa_healthy_core_tvds(spa_t
*spa
)
1749 vdev_t
*rvd
= spa
->spa_root_vdev
;
1752 for (uint64_t i
= 0; i
< rvd
->vdev_children
; i
++) {
1753 vdev_t
*vd
= rvd
->vdev_child
[i
];
1756 if (vdev_is_concrete(vd
) && !vdev_is_dead(vd
))
1764 * Checks to see if the given vdev could not be opened, in which case we post a
1765 * sysevent to notify the autoreplace code that the device has been removed.
1768 spa_check_removed(vdev_t
*vd
)
1770 for (uint64_t c
= 0; c
< vd
->vdev_children
; c
++)
1771 spa_check_removed(vd
->vdev_child
[c
]);
1773 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_is_dead(vd
) &&
1774 vdev_is_concrete(vd
)) {
1775 zfs_post_autoreplace(vd
->vdev_spa
, vd
);
1776 spa_event_notify(vd
->vdev_spa
, vd
, NULL
, ESC_ZFS_VDEV_CHECK
);
1781 spa_check_for_missing_logs(spa_t
*spa
)
1783 vdev_t
*rvd
= spa
->spa_root_vdev
;
1786 * If we're doing a normal import, then build up any additional
1787 * diagnostic information about missing log devices.
1788 * We'll pass this up to the user for further processing.
1790 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
)) {
1791 nvlist_t
**child
, *nv
;
1794 child
= kmem_alloc(rvd
->vdev_children
* sizeof (nvlist_t
**),
1796 VERIFY(nvlist_alloc(&nv
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
1798 for (uint64_t c
= 0; c
< rvd
->vdev_children
; c
++) {
1799 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1802 * We consider a device as missing only if it failed
1803 * to open (i.e. offline or faulted is not considered
1806 if (tvd
->vdev_islog
&&
1807 tvd
->vdev_state
== VDEV_STATE_CANT_OPEN
) {
1808 child
[idx
++] = vdev_config_generate(spa
, tvd
,
1809 B_FALSE
, VDEV_CONFIG_MISSING
);
1814 fnvlist_add_nvlist_array(nv
,
1815 ZPOOL_CONFIG_CHILDREN
, child
, idx
);
1816 fnvlist_add_nvlist(spa
->spa_load_info
,
1817 ZPOOL_CONFIG_MISSING_DEVICES
, nv
);
1819 for (uint64_t i
= 0; i
< idx
; i
++)
1820 nvlist_free(child
[i
]);
1823 kmem_free(child
, rvd
->vdev_children
* sizeof (char **));
1826 spa_load_failed(spa
, "some log devices are missing");
1827 vdev_dbgmsg_print_tree(rvd
, 2);
1828 return (SET_ERROR(ENXIO
));
1831 for (uint64_t c
= 0; c
< rvd
->vdev_children
; c
++) {
1832 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1834 if (tvd
->vdev_islog
&&
1835 tvd
->vdev_state
== VDEV_STATE_CANT_OPEN
) {
1836 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
1837 spa_load_note(spa
, "some log devices are "
1838 "missing, ZIL is dropped.");
1839 vdev_dbgmsg_print_tree(rvd
, 2);
1849 * Check for missing log devices
1852 spa_check_logs(spa_t
*spa
)
1854 boolean_t rv
= B_FALSE
;
1855 dsl_pool_t
*dp
= spa_get_dsl(spa
);
1857 switch (spa
->spa_log_state
) {
1858 case SPA_LOG_MISSING
:
1859 /* need to recheck in case slog has been restored */
1860 case SPA_LOG_UNKNOWN
:
1861 rv
= (dmu_objset_find_dp(dp
, dp
->dp_root_dir_obj
,
1862 zil_check_log_chain
, NULL
, DS_FIND_CHILDREN
) != 0);
1864 spa_set_log_state(spa
, SPA_LOG_MISSING
);
1871 spa_passivate_log(spa_t
*spa
)
1873 vdev_t
*rvd
= spa
->spa_root_vdev
;
1874 boolean_t slog_found
= B_FALSE
;
1876 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1878 if (!spa_has_slogs(spa
))
1881 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1882 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1883 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1885 if (tvd
->vdev_islog
) {
1886 metaslab_group_passivate(mg
);
1887 slog_found
= B_TRUE
;
1891 return (slog_found
);
1895 spa_activate_log(spa_t
*spa
)
1897 vdev_t
*rvd
= spa
->spa_root_vdev
;
1899 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1901 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1902 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1903 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1905 if (tvd
->vdev_islog
)
1906 metaslab_group_activate(mg
);
1911 spa_reset_logs(spa_t
*spa
)
1915 error
= dmu_objset_find(spa_name(spa
), zil_reset
,
1916 NULL
, DS_FIND_CHILDREN
);
1919 * We successfully offlined the log device, sync out the
1920 * current txg so that the "stubby" block can be removed
1923 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1929 spa_aux_check_removed(spa_aux_vdev_t
*sav
)
1931 for (int i
= 0; i
< sav
->sav_count
; i
++)
1932 spa_check_removed(sav
->sav_vdevs
[i
]);
1936 spa_claim_notify(zio_t
*zio
)
1938 spa_t
*spa
= zio
->io_spa
;
1943 mutex_enter(&spa
->spa_props_lock
); /* any mutex will do */
1944 if (spa
->spa_claim_max_txg
< zio
->io_bp
->blk_birth
)
1945 spa
->spa_claim_max_txg
= zio
->io_bp
->blk_birth
;
1946 mutex_exit(&spa
->spa_props_lock
);
1949 typedef struct spa_load_error
{
1950 uint64_t sle_meta_count
;
1951 uint64_t sle_data_count
;
1955 spa_load_verify_done(zio_t
*zio
)
1957 blkptr_t
*bp
= zio
->io_bp
;
1958 spa_load_error_t
*sle
= zio
->io_private
;
1959 dmu_object_type_t type
= BP_GET_TYPE(bp
);
1960 int error
= zio
->io_error
;
1961 spa_t
*spa
= zio
->io_spa
;
1963 abd_free(zio
->io_abd
);
1965 if ((BP_GET_LEVEL(bp
) != 0 || DMU_OT_IS_METADATA(type
)) &&
1966 type
!= DMU_OT_INTENT_LOG
)
1967 atomic_inc_64(&sle
->sle_meta_count
);
1969 atomic_inc_64(&sle
->sle_data_count
);
1972 mutex_enter(&spa
->spa_scrub_lock
);
1973 spa
->spa_scrub_inflight
--;
1974 cv_broadcast(&spa
->spa_scrub_io_cv
);
1975 mutex_exit(&spa
->spa_scrub_lock
);
1979 * Maximum number of concurrent scrub i/os to create while verifying
1980 * a pool while importing it.
1982 int spa_load_verify_maxinflight
= 10000;
1983 boolean_t spa_load_verify_metadata
= B_TRUE
;
1984 boolean_t spa_load_verify_data
= B_TRUE
;
1988 spa_load_verify_cb(spa_t
*spa
, zilog_t
*zilog
, const blkptr_t
*bp
,
1989 const zbookmark_phys_t
*zb
, const dnode_phys_t
*dnp
, void *arg
)
1991 if (bp
== NULL
|| BP_IS_HOLE(bp
) || BP_IS_EMBEDDED(bp
))
1994 * Note: normally this routine will not be called if
1995 * spa_load_verify_metadata is not set. However, it may be useful
1996 * to manually set the flag after the traversal has begun.
1998 if (!spa_load_verify_metadata
)
2000 if (!BP_IS_METADATA(bp
) && !spa_load_verify_data
)
2004 size_t size
= BP_GET_PSIZE(bp
);
2006 mutex_enter(&spa
->spa_scrub_lock
);
2007 while (spa
->spa_scrub_inflight
>= spa_load_verify_maxinflight
)
2008 cv_wait(&spa
->spa_scrub_io_cv
, &spa
->spa_scrub_lock
);
2009 spa
->spa_scrub_inflight
++;
2010 mutex_exit(&spa
->spa_scrub_lock
);
2012 zio_nowait(zio_read(rio
, spa
, bp
, abd_alloc_for_io(size
, B_FALSE
), size
,
2013 spa_load_verify_done
, rio
->io_private
, ZIO_PRIORITY_SCRUB
,
2014 ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_CANFAIL
|
2015 ZIO_FLAG_SCRUB
| ZIO_FLAG_RAW
, zb
));
2021 verify_dataset_name_len(dsl_pool_t
*dp
, dsl_dataset_t
*ds
, void *arg
)
2023 if (dsl_dataset_namelen(ds
) >= ZFS_MAX_DATASET_NAME_LEN
)
2024 return (SET_ERROR(ENAMETOOLONG
));
2030 spa_load_verify(spa_t
*spa
)
2033 spa_load_error_t sle
= { 0 };
2034 zpool_load_policy_t policy
;
2035 boolean_t verify_ok
= B_FALSE
;
2038 zpool_get_load_policy(spa
->spa_config
, &policy
);
2040 if (policy
.zlp_rewind
& ZPOOL_NEVER_REWIND
)
2043 dsl_pool_config_enter(spa
->spa_dsl_pool
, FTAG
);
2044 error
= dmu_objset_find_dp(spa
->spa_dsl_pool
,
2045 spa
->spa_dsl_pool
->dp_root_dir_obj
, verify_dataset_name_len
, NULL
,
2047 dsl_pool_config_exit(spa
->spa_dsl_pool
, FTAG
);
2051 rio
= zio_root(spa
, NULL
, &sle
,
2052 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
);
2054 if (spa_load_verify_metadata
) {
2055 if (spa
->spa_extreme_rewind
) {
2056 spa_load_note(spa
, "performing a complete scan of the "
2057 "pool since extreme rewind is on. This may take "
2058 "a very long time.\n (spa_load_verify_data=%u, "
2059 "spa_load_verify_metadata=%u)",
2060 spa_load_verify_data
, spa_load_verify_metadata
);
2062 error
= traverse_pool(spa
, spa
->spa_verify_min_txg
,
2063 TRAVERSE_PRE
| TRAVERSE_PREFETCH_METADATA
,
2064 spa_load_verify_cb
, rio
);
2067 (void) zio_wait(rio
);
2069 spa
->spa_load_meta_errors
= sle
.sle_meta_count
;
2070 spa
->spa_load_data_errors
= sle
.sle_data_count
;
2072 if (sle
.sle_meta_count
!= 0 || sle
.sle_data_count
!= 0) {
2073 spa_load_note(spa
, "spa_load_verify found %llu metadata errors "
2074 "and %llu data errors", (u_longlong_t
)sle
.sle_meta_count
,
2075 (u_longlong_t
)sle
.sle_data_count
);
2078 if (spa_load_verify_dryrun
||
2079 (!error
&& sle
.sle_meta_count
<= policy
.zlp_maxmeta
&&
2080 sle
.sle_data_count
<= policy
.zlp_maxdata
)) {
2084 spa
->spa_load_txg
= spa
->spa_uberblock
.ub_txg
;
2085 spa
->spa_load_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
2087 loss
= spa
->spa_last_ubsync_txg_ts
- spa
->spa_load_txg_ts
;
2088 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
2089 ZPOOL_CONFIG_LOAD_TIME
, spa
->spa_load_txg_ts
) == 0);
2090 VERIFY(nvlist_add_int64(spa
->spa_load_info
,
2091 ZPOOL_CONFIG_REWIND_TIME
, loss
) == 0);
2092 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
2093 ZPOOL_CONFIG_LOAD_DATA_ERRORS
, sle
.sle_data_count
) == 0);
2095 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
;
2098 if (spa_load_verify_dryrun
)
2102 if (error
!= ENXIO
&& error
!= EIO
)
2103 error
= SET_ERROR(EIO
);
2107 return (verify_ok
? 0 : EIO
);
2111 * Find a value in the pool props object.
2114 spa_prop_find(spa_t
*spa
, zpool_prop_t prop
, uint64_t *val
)
2116 (void) zap_lookup(spa
->spa_meta_objset
, spa
->spa_pool_props_object
,
2117 zpool_prop_to_name(prop
), sizeof (uint64_t), 1, val
);
2121 * Find a value in the pool directory object.
2124 spa_dir_prop(spa_t
*spa
, const char *name
, uint64_t *val
, boolean_t log_enoent
)
2126 int error
= zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
2127 name
, sizeof (uint64_t), 1, val
);
2129 if (error
!= 0 && (error
!= ENOENT
|| log_enoent
)) {
2130 spa_load_failed(spa
, "couldn't get '%s' value in MOS directory "
2131 "[error=%d]", name
, error
);
2138 spa_vdev_err(vdev_t
*vdev
, vdev_aux_t aux
, int err
)
2140 vdev_set_state(vdev
, B_TRUE
, VDEV_STATE_CANT_OPEN
, aux
);
2141 return (SET_ERROR(err
));
2145 spa_spawn_aux_threads(spa_t
*spa
)
2147 ASSERT(spa_writeable(spa
));
2149 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
2151 spa_start_indirect_condensing_thread(spa
);
2153 ASSERT3P(spa
->spa_checkpoint_discard_zthr
, ==, NULL
);
2154 spa
->spa_checkpoint_discard_zthr
=
2155 zthr_create(spa_checkpoint_discard_thread_check
,
2156 spa_checkpoint_discard_thread
, spa
);
2160 * Fix up config after a partly-completed split. This is done with the
2161 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
2162 * pool have that entry in their config, but only the splitting one contains
2163 * a list of all the guids of the vdevs that are being split off.
2165 * This function determines what to do with that list: either rejoin
2166 * all the disks to the pool, or complete the splitting process. To attempt
2167 * the rejoin, each disk that is offlined is marked online again, and
2168 * we do a reopen() call. If the vdev label for every disk that was
2169 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
2170 * then we call vdev_split() on each disk, and complete the split.
2172 * Otherwise we leave the config alone, with all the vdevs in place in
2173 * the original pool.
2176 spa_try_repair(spa_t
*spa
, nvlist_t
*config
)
2183 boolean_t attempt_reopen
;
2185 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
, &nvl
) != 0)
2188 /* check that the config is complete */
2189 if (nvlist_lookup_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
2190 &glist
, &gcount
) != 0)
2193 vd
= kmem_zalloc(gcount
* sizeof (vdev_t
*), KM_SLEEP
);
2195 /* attempt to online all the vdevs & validate */
2196 attempt_reopen
= B_TRUE
;
2197 for (i
= 0; i
< gcount
; i
++) {
2198 if (glist
[i
] == 0) /* vdev is hole */
2201 vd
[i
] = spa_lookup_by_guid(spa
, glist
[i
], B_FALSE
);
2202 if (vd
[i
] == NULL
) {
2204 * Don't bother attempting to reopen the disks;
2205 * just do the split.
2207 attempt_reopen
= B_FALSE
;
2209 /* attempt to re-online it */
2210 vd
[i
]->vdev_offline
= B_FALSE
;
2214 if (attempt_reopen
) {
2215 vdev_reopen(spa
->spa_root_vdev
);
2217 /* check each device to see what state it's in */
2218 for (extracted
= 0, i
= 0; i
< gcount
; i
++) {
2219 if (vd
[i
] != NULL
&&
2220 vd
[i
]->vdev_stat
.vs_aux
!= VDEV_AUX_SPLIT_POOL
)
2227 * If every disk has been moved to the new pool, or if we never
2228 * even attempted to look at them, then we split them off for
2231 if (!attempt_reopen
|| gcount
== extracted
) {
2232 for (i
= 0; i
< gcount
; i
++)
2235 vdev_reopen(spa
->spa_root_vdev
);
2238 kmem_free(vd
, gcount
* sizeof (vdev_t
*));
2242 spa_load(spa_t
*spa
, spa_load_state_t state
, spa_import_type_t type
)
2244 char *ereport
= FM_EREPORT_ZFS_POOL
;
2247 spa
->spa_load_state
= state
;
2249 gethrestime(&spa
->spa_loaded_ts
);
2250 error
= spa_load_impl(spa
, type
, &ereport
);
2253 * Don't count references from objsets that are already closed
2254 * and are making their way through the eviction process.
2256 spa_evicting_os_wait(spa
);
2257 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
2259 if (error
!= EEXIST
) {
2260 spa
->spa_loaded_ts
.tv_sec
= 0;
2261 spa
->spa_loaded_ts
.tv_nsec
= 0;
2263 if (error
!= EBADF
) {
2264 zfs_ereport_post(ereport
, spa
, NULL
, NULL
, 0, 0);
2267 spa
->spa_load_state
= error
? SPA_LOAD_ERROR
: SPA_LOAD_NONE
;
2274 * Count the number of per-vdev ZAPs associated with all of the vdevs in the
2275 * vdev tree rooted in the given vd, and ensure that each ZAP is present in the
2276 * spa's per-vdev ZAP list.
2279 vdev_count_verify_zaps(vdev_t
*vd
)
2281 spa_t
*spa
= vd
->vdev_spa
;
2283 if (vd
->vdev_top_zap
!= 0) {
2285 ASSERT0(zap_lookup_int(spa
->spa_meta_objset
,
2286 spa
->spa_all_vdev_zaps
, vd
->vdev_top_zap
));
2288 if (vd
->vdev_leaf_zap
!= 0) {
2290 ASSERT0(zap_lookup_int(spa
->spa_meta_objset
,
2291 spa
->spa_all_vdev_zaps
, vd
->vdev_leaf_zap
));
2294 for (uint64_t i
= 0; i
< vd
->vdev_children
; i
++) {
2295 total
+= vdev_count_verify_zaps(vd
->vdev_child
[i
]);
2302 spa_verify_host(spa_t
*spa
, nvlist_t
*mos_config
)
2306 uint64_t myhostid
= 0;
2308 if (!spa_is_root(spa
) && nvlist_lookup_uint64(mos_config
,
2309 ZPOOL_CONFIG_HOSTID
, &hostid
) == 0) {
2310 hostname
= fnvlist_lookup_string(mos_config
,
2311 ZPOOL_CONFIG_HOSTNAME
);
2313 myhostid
= zone_get_hostid(NULL
);
2315 if (hostid
!= 0 && myhostid
!= 0 && hostid
!= myhostid
) {
2316 cmn_err(CE_WARN
, "pool '%s' could not be "
2317 "loaded as it was last accessed by "
2318 "another system (host: %s hostid: 0x%llx). "
2319 "See: http://illumos.org/msg/ZFS-8000-EY",
2320 spa_name(spa
), hostname
, (u_longlong_t
)hostid
);
2321 spa_load_failed(spa
, "hostid verification failed: pool "
2322 "last accessed by host: %s (hostid: 0x%llx)",
2323 hostname
, (u_longlong_t
)hostid
);
2324 return (SET_ERROR(EBADF
));
2332 spa_ld_parse_config(spa_t
*spa
, spa_import_type_t type
)
2335 nvlist_t
*nvtree
, *nvl
, *config
= spa
->spa_config
;
2342 * Versioning wasn't explicitly added to the label until later, so if
2343 * it's not present treat it as the initial version.
2345 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VERSION
,
2346 &spa
->spa_ubsync
.ub_version
) != 0)
2347 spa
->spa_ubsync
.ub_version
= SPA_VERSION_INITIAL
;
2349 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
, &pool_guid
)) {
2350 spa_load_failed(spa
, "invalid config provided: '%s' missing",
2351 ZPOOL_CONFIG_POOL_GUID
);
2352 return (SET_ERROR(EINVAL
));
2356 * If we are doing an import, ensure that the pool is not already
2357 * imported by checking if its pool guid already exists in the
2360 * The only case that we allow an already imported pool to be
2361 * imported again, is when the pool is checkpointed and we want to
2362 * look at its checkpointed state from userland tools like zdb.
2365 if ((spa
->spa_load_state
== SPA_LOAD_IMPORT
||
2366 spa
->spa_load_state
== SPA_LOAD_TRYIMPORT
) &&
2367 spa_guid_exists(pool_guid
, 0)) {
2369 if ((spa
->spa_load_state
== SPA_LOAD_IMPORT
||
2370 spa
->spa_load_state
== SPA_LOAD_TRYIMPORT
) &&
2371 spa_guid_exists(pool_guid
, 0) &&
2372 !spa_importing_readonly_checkpoint(spa
)) {
2374 spa_load_failed(spa
, "a pool with guid %llu is already open",
2375 (u_longlong_t
)pool_guid
);
2376 return (SET_ERROR(EEXIST
));
2379 spa
->spa_config_guid
= pool_guid
;
2381 nvlist_free(spa
->spa_load_info
);
2382 spa
->spa_load_info
= fnvlist_alloc();
2384 ASSERT(spa
->spa_comment
== NULL
);
2385 if (nvlist_lookup_string(config
, ZPOOL_CONFIG_COMMENT
, &comment
) == 0)
2386 spa
->spa_comment
= spa_strdup(comment
);
2388 (void) nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
2389 &spa
->spa_config_txg
);
2391 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
, &nvl
) == 0)
2392 spa
->spa_config_splitting
= fnvlist_dup(nvl
);
2394 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvtree
)) {
2395 spa_load_failed(spa
, "invalid config provided: '%s' missing",
2396 ZPOOL_CONFIG_VDEV_TREE
);
2397 return (SET_ERROR(EINVAL
));
2401 * Create "The Godfather" zio to hold all async IOs
2403 spa
->spa_async_zio_root
= kmem_alloc(max_ncpus
* sizeof (void *),
2405 for (int i
= 0; i
< max_ncpus
; i
++) {
2406 spa
->spa_async_zio_root
[i
] = zio_root(spa
, NULL
, NULL
,
2407 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
|
2408 ZIO_FLAG_GODFATHER
);
2412 * Parse the configuration into a vdev tree. We explicitly set the
2413 * value that will be returned by spa_version() since parsing the
2414 * configuration requires knowing the version number.
2416 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2417 parse
= (type
== SPA_IMPORT_EXISTING
?
2418 VDEV_ALLOC_LOAD
: VDEV_ALLOC_SPLIT
);
2419 error
= spa_config_parse(spa
, &rvd
, nvtree
, NULL
, 0, parse
);
2420 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2423 spa_load_failed(spa
, "unable to parse config [error=%d]",
2428 ASSERT(spa
->spa_root_vdev
== rvd
);
2429 ASSERT3U(spa
->spa_min_ashift
, >=, SPA_MINBLOCKSHIFT
);
2430 ASSERT3U(spa
->spa_max_ashift
, <=, SPA_MAXBLOCKSHIFT
);
2432 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2433 ASSERT(spa_guid(spa
) == pool_guid
);
2440 * Recursively open all vdevs in the vdev tree. This function is called twice:
2441 * first with the untrusted config, then with the trusted config.
2444 spa_ld_open_vdevs(spa_t
*spa
)
2449 * spa_missing_tvds_allowed defines how many top-level vdevs can be
2450 * missing/unopenable for the root vdev to be still considered openable.
2452 if (spa
->spa_trust_config
) {
2453 spa
->spa_missing_tvds_allowed
= zfs_max_missing_tvds
;
2454 } else if (spa
->spa_config_source
== SPA_CONFIG_SRC_CACHEFILE
) {
2455 spa
->spa_missing_tvds_allowed
= zfs_max_missing_tvds_cachefile
;
2456 } else if (spa
->spa_config_source
== SPA_CONFIG_SRC_SCAN
) {
2457 spa
->spa_missing_tvds_allowed
= zfs_max_missing_tvds_scan
;
2459 spa
->spa_missing_tvds_allowed
= 0;
2462 spa
->spa_missing_tvds_allowed
=
2463 MAX(zfs_max_missing_tvds
, spa
->spa_missing_tvds_allowed
);
2465 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2466 error
= vdev_open(spa
->spa_root_vdev
);
2467 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2469 if (spa
->spa_missing_tvds
!= 0) {
2470 spa_load_note(spa
, "vdev tree has %lld missing top-level "
2471 "vdevs.", (u_longlong_t
)spa
->spa_missing_tvds
);
2472 if (spa
->spa_trust_config
&& (spa
->spa_mode
& FWRITE
)) {
2474 * Although theoretically we could allow users to open
2475 * incomplete pools in RW mode, we'd need to add a lot
2476 * of extra logic (e.g. adjust pool space to account
2477 * for missing vdevs).
2478 * This limitation also prevents users from accidentally
2479 * opening the pool in RW mode during data recovery and
2480 * damaging it further.
2482 spa_load_note(spa
, "pools with missing top-level "
2483 "vdevs can only be opened in read-only mode.");
2484 error
= SET_ERROR(ENXIO
);
2486 spa_load_note(spa
, "current settings allow for maximum "
2487 "%lld missing top-level vdevs at this stage.",
2488 (u_longlong_t
)spa
->spa_missing_tvds_allowed
);
2492 spa_load_failed(spa
, "unable to open vdev tree [error=%d]",
2495 if (spa
->spa_missing_tvds
!= 0 || error
!= 0)
2496 vdev_dbgmsg_print_tree(spa
->spa_root_vdev
, 2);
2502 * We need to validate the vdev labels against the configuration that
2503 * we have in hand. This function is called twice: first with an untrusted
2504 * config, then with a trusted config. The validation is more strict when the
2505 * config is trusted.
2508 spa_ld_validate_vdevs(spa_t
*spa
)
2511 vdev_t
*rvd
= spa
->spa_root_vdev
;
2513 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2514 error
= vdev_validate(rvd
);
2515 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2518 spa_load_failed(spa
, "vdev_validate failed [error=%d]", error
);
2522 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
) {
2523 spa_load_failed(spa
, "cannot open vdev tree after invalidating "
2525 vdev_dbgmsg_print_tree(rvd
, 2);
2526 return (SET_ERROR(ENXIO
));
2533 spa_ld_select_uberblock_done(spa_t
*spa
, uberblock_t
*ub
)
2535 spa
->spa_state
= POOL_STATE_ACTIVE
;
2536 spa
->spa_ubsync
= spa
->spa_uberblock
;
2537 spa
->spa_verify_min_txg
= spa
->spa_extreme_rewind
?
2538 TXG_INITIAL
- 1 : spa_last_synced_txg(spa
) - TXG_DEFER_SIZE
- 1;
2539 spa
->spa_first_txg
= spa
->spa_last_ubsync_txg
?
2540 spa
->spa_last_ubsync_txg
: spa_last_synced_txg(spa
) + 1;
2541 spa
->spa_claim_max_txg
= spa
->spa_first_txg
;
2542 spa
->spa_prev_software_version
= ub
->ub_software_version
;
2546 spa_ld_select_uberblock(spa_t
*spa
, spa_import_type_t type
)
2548 vdev_t
*rvd
= spa
->spa_root_vdev
;
2550 uberblock_t
*ub
= &spa
->spa_uberblock
;
2553 * If we are opening the checkpointed state of the pool by
2554 * rewinding to it, at this point we will have written the
2555 * checkpointed uberblock to the vdev labels, so searching
2556 * the labels will find the right uberblock. However, if
2557 * we are opening the checkpointed state read-only, we have
2558 * not modified the labels. Therefore, we must ignore the
2559 * labels and continue using the spa_uberblock that was set
2560 * by spa_ld_checkpoint_rewind.
2562 * Note that it would be fine to ignore the labels when
2563 * rewinding (opening writeable) as well. However, if we
2564 * crash just after writing the labels, we will end up
2565 * searching the labels. Doing so in the common case means
2566 * that this code path gets exercised normally, rather than
2567 * just in the edge case.
2569 if (ub
->ub_checkpoint_txg
!= 0 &&
2570 spa_importing_readonly_checkpoint(spa
)) {
2571 spa_ld_select_uberblock_done(spa
, ub
);
2576 * Find the best uberblock.
2578 vdev_uberblock_load(rvd
, ub
, &label
);
2581 * If we weren't able to find a single valid uberblock, return failure.
2583 if (ub
->ub_txg
== 0) {
2585 spa_load_failed(spa
, "no valid uberblock found");
2586 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, ENXIO
));
2589 spa_load_note(spa
, "using uberblock with txg=%llu",
2590 (u_longlong_t
)ub
->ub_txg
);
2593 * If the pool has an unsupported version we can't open it.
2595 if (!SPA_VERSION_IS_SUPPORTED(ub
->ub_version
)) {
2597 spa_load_failed(spa
, "version %llu is not supported",
2598 (u_longlong_t
)ub
->ub_version
);
2599 return (spa_vdev_err(rvd
, VDEV_AUX_VERSION_NEWER
, ENOTSUP
));
2602 if (ub
->ub_version
>= SPA_VERSION_FEATURES
) {
2606 * If we weren't able to find what's necessary for reading the
2607 * MOS in the label, return failure.
2609 if (label
== NULL
) {
2610 spa_load_failed(spa
, "label config unavailable");
2611 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2615 if (nvlist_lookup_nvlist(label
, ZPOOL_CONFIG_FEATURES_FOR_READ
,
2618 spa_load_failed(spa
, "invalid label: '%s' missing",
2619 ZPOOL_CONFIG_FEATURES_FOR_READ
);
2620 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2625 * Update our in-core representation with the definitive values
2628 nvlist_free(spa
->spa_label_features
);
2629 VERIFY(nvlist_dup(features
, &spa
->spa_label_features
, 0) == 0);
2635 * Look through entries in the label nvlist's features_for_read. If
2636 * there is a feature listed there which we don't understand then we
2637 * cannot open a pool.
2639 if (ub
->ub_version
>= SPA_VERSION_FEATURES
) {
2640 nvlist_t
*unsup_feat
;
2642 VERIFY(nvlist_alloc(&unsup_feat
, NV_UNIQUE_NAME
, KM_SLEEP
) ==
2645 for (nvpair_t
*nvp
= nvlist_next_nvpair(spa
->spa_label_features
,
2647 nvp
= nvlist_next_nvpair(spa
->spa_label_features
, nvp
)) {
2648 if (!zfeature_is_supported(nvpair_name(nvp
))) {
2649 VERIFY(nvlist_add_string(unsup_feat
,
2650 nvpair_name(nvp
), "") == 0);
2654 if (!nvlist_empty(unsup_feat
)) {
2655 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
2656 ZPOOL_CONFIG_UNSUP_FEAT
, unsup_feat
) == 0);
2657 nvlist_free(unsup_feat
);
2658 spa_load_failed(spa
, "some features are unsupported");
2659 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
,
2663 nvlist_free(unsup_feat
);
2666 if (type
!= SPA_IMPORT_ASSEMBLE
&& spa
->spa_config_splitting
) {
2667 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2668 spa_try_repair(spa
, spa
->spa_config
);
2669 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2670 nvlist_free(spa
->spa_config_splitting
);
2671 spa
->spa_config_splitting
= NULL
;
2675 * Initialize internal SPA structures.
2677 spa_ld_select_uberblock_done(spa
, ub
);
2683 spa_ld_open_rootbp(spa_t
*spa
)
2686 vdev_t
*rvd
= spa
->spa_root_vdev
;
2688 error
= dsl_pool_init(spa
, spa
->spa_first_txg
, &spa
->spa_dsl_pool
);
2690 spa_load_failed(spa
, "unable to open rootbp in dsl_pool_init "
2691 "[error=%d]", error
);
2692 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2694 spa
->spa_meta_objset
= spa
->spa_dsl_pool
->dp_meta_objset
;
2700 spa_ld_trusted_config(spa_t
*spa
, spa_import_type_t type
,
2701 boolean_t reloading
)
2703 vdev_t
*mrvd
, *rvd
= spa
->spa_root_vdev
;
2704 nvlist_t
*nv
, *mos_config
, *policy
;
2705 int error
= 0, copy_error
;
2706 uint64_t healthy_tvds
, healthy_tvds_mos
;
2707 uint64_t mos_config_txg
;
2709 if (spa_dir_prop(spa
, DMU_POOL_CONFIG
, &spa
->spa_config_object
, B_TRUE
)
2711 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2714 * If we're assembling a pool from a split, the config provided is
2715 * already trusted so there is nothing to do.
2717 if (type
== SPA_IMPORT_ASSEMBLE
)
2720 healthy_tvds
= spa_healthy_core_tvds(spa
);
2722 if (load_nvlist(spa
, spa
->spa_config_object
, &mos_config
)
2724 spa_load_failed(spa
, "unable to retrieve MOS config");
2725 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2729 * If we are doing an open, pool owner wasn't verified yet, thus do
2730 * the verification here.
2732 if (spa
->spa_load_state
== SPA_LOAD_OPEN
) {
2733 error
= spa_verify_host(spa
, mos_config
);
2735 nvlist_free(mos_config
);
2740 nv
= fnvlist_lookup_nvlist(mos_config
, ZPOOL_CONFIG_VDEV_TREE
);
2742 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2745 * Build a new vdev tree from the trusted config
2747 VERIFY(spa_config_parse(spa
, &mrvd
, nv
, NULL
, 0, VDEV_ALLOC_LOAD
) == 0);
2750 * Vdev paths in the MOS may be obsolete. If the untrusted config was
2751 * obtained by scanning /dev/dsk, then it will have the right vdev
2752 * paths. We update the trusted MOS config with this information.
2753 * We first try to copy the paths with vdev_copy_path_strict, which
2754 * succeeds only when both configs have exactly the same vdev tree.
2755 * If that fails, we fall back to a more flexible method that has a
2756 * best effort policy.
2758 copy_error
= vdev_copy_path_strict(rvd
, mrvd
);
2759 if (copy_error
!= 0 || spa_load_print_vdev_tree
) {
2760 spa_load_note(spa
, "provided vdev tree:");
2761 vdev_dbgmsg_print_tree(rvd
, 2);
2762 spa_load_note(spa
, "MOS vdev tree:");
2763 vdev_dbgmsg_print_tree(mrvd
, 2);
2765 if (copy_error
!= 0) {
2766 spa_load_note(spa
, "vdev_copy_path_strict failed, falling "
2767 "back to vdev_copy_path_relaxed");
2768 vdev_copy_path_relaxed(rvd
, mrvd
);
2773 spa
->spa_root_vdev
= mrvd
;
2775 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2778 * We will use spa_config if we decide to reload the spa or if spa_load
2779 * fails and we rewind. We must thus regenerate the config using the
2780 * MOS information with the updated paths. ZPOOL_LOAD_POLICY is used to
2781 * pass settings on how to load the pool and is not stored in the MOS.
2782 * We copy it over to our new, trusted config.
2784 mos_config_txg
= fnvlist_lookup_uint64(mos_config
,
2785 ZPOOL_CONFIG_POOL_TXG
);
2786 nvlist_free(mos_config
);
2787 mos_config
= spa_config_generate(spa
, NULL
, mos_config_txg
, B_FALSE
);
2788 if (nvlist_lookup_nvlist(spa
->spa_config
, ZPOOL_LOAD_POLICY
,
2790 fnvlist_add_nvlist(mos_config
, ZPOOL_LOAD_POLICY
, policy
);
2791 spa_config_set(spa
, mos_config
);
2792 spa
->spa_config_source
= SPA_CONFIG_SRC_MOS
;
2795 * Now that we got the config from the MOS, we should be more strict
2796 * in checking blkptrs and can make assumptions about the consistency
2797 * of the vdev tree. spa_trust_config must be set to true before opening
2798 * vdevs in order for them to be writeable.
2800 spa
->spa_trust_config
= B_TRUE
;
2803 * Open and validate the new vdev tree
2805 error
= spa_ld_open_vdevs(spa
);
2809 error
= spa_ld_validate_vdevs(spa
);
2813 if (copy_error
!= 0 || spa_load_print_vdev_tree
) {
2814 spa_load_note(spa
, "final vdev tree:");
2815 vdev_dbgmsg_print_tree(rvd
, 2);
2818 if (spa
->spa_load_state
!= SPA_LOAD_TRYIMPORT
&&
2819 !spa
->spa_extreme_rewind
&& zfs_max_missing_tvds
== 0) {
2821 * Sanity check to make sure that we are indeed loading the
2822 * latest uberblock. If we missed SPA_SYNC_MIN_VDEVS tvds
2823 * in the config provided and they happened to be the only ones
2824 * to have the latest uberblock, we could involuntarily perform
2825 * an extreme rewind.
2827 healthy_tvds_mos
= spa_healthy_core_tvds(spa
);
2828 if (healthy_tvds_mos
- healthy_tvds
>=
2829 SPA_SYNC_MIN_VDEVS
) {
2830 spa_load_note(spa
, "config provided misses too many "
2831 "top-level vdevs compared to MOS (%lld vs %lld). ",
2832 (u_longlong_t
)healthy_tvds
,
2833 (u_longlong_t
)healthy_tvds_mos
);
2834 spa_load_note(spa
, "vdev tree:");
2835 vdev_dbgmsg_print_tree(rvd
, 2);
2837 spa_load_failed(spa
, "config was already "
2838 "provided from MOS. Aborting.");
2839 return (spa_vdev_err(rvd
,
2840 VDEV_AUX_CORRUPT_DATA
, EIO
));
2842 spa_load_note(spa
, "spa must be reloaded using MOS "
2844 return (SET_ERROR(EAGAIN
));
2848 error
= spa_check_for_missing_logs(spa
);
2850 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
, ENXIO
));
2852 if (rvd
->vdev_guid_sum
!= spa
->spa_uberblock
.ub_guid_sum
) {
2853 spa_load_failed(spa
, "uberblock guid sum doesn't match MOS "
2854 "guid sum (%llu != %llu)",
2855 (u_longlong_t
)spa
->spa_uberblock
.ub_guid_sum
,
2856 (u_longlong_t
)rvd
->vdev_guid_sum
);
2857 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
,
2865 spa_ld_open_indirect_vdev_metadata(spa_t
*spa
)
2868 vdev_t
*rvd
= spa
->spa_root_vdev
;
2871 * Everything that we read before spa_remove_init() must be stored
2872 * on concreted vdevs. Therefore we do this as early as possible.
2874 error
= spa_remove_init(spa
);
2876 spa_load_failed(spa
, "spa_remove_init failed [error=%d]",
2878 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2882 * Retrieve information needed to condense indirect vdev mappings.
2884 error
= spa_condense_init(spa
);
2886 spa_load_failed(spa
, "spa_condense_init failed [error=%d]",
2888 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, error
));
2895 spa_ld_check_features(spa_t
*spa
, boolean_t
*missing_feat_writep
)
2898 vdev_t
*rvd
= spa
->spa_root_vdev
;
2900 if (spa_version(spa
) >= SPA_VERSION_FEATURES
) {
2901 boolean_t missing_feat_read
= B_FALSE
;
2902 nvlist_t
*unsup_feat
, *enabled_feat
;
2904 if (spa_dir_prop(spa
, DMU_POOL_FEATURES_FOR_READ
,
2905 &spa
->spa_feat_for_read_obj
, B_TRUE
) != 0) {
2906 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2909 if (spa_dir_prop(spa
, DMU_POOL_FEATURES_FOR_WRITE
,
2910 &spa
->spa_feat_for_write_obj
, B_TRUE
) != 0) {
2911 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2914 if (spa_dir_prop(spa
, DMU_POOL_FEATURE_DESCRIPTIONS
,
2915 &spa
->spa_feat_desc_obj
, B_TRUE
) != 0) {
2916 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2919 enabled_feat
= fnvlist_alloc();
2920 unsup_feat
= fnvlist_alloc();
2922 if (!spa_features_check(spa
, B_FALSE
,
2923 unsup_feat
, enabled_feat
))
2924 missing_feat_read
= B_TRUE
;
2926 if (spa_writeable(spa
) ||
2927 spa
->spa_load_state
== SPA_LOAD_TRYIMPORT
) {
2928 if (!spa_features_check(spa
, B_TRUE
,
2929 unsup_feat
, enabled_feat
)) {
2930 *missing_feat_writep
= B_TRUE
;
2934 fnvlist_add_nvlist(spa
->spa_load_info
,
2935 ZPOOL_CONFIG_ENABLED_FEAT
, enabled_feat
);
2937 if (!nvlist_empty(unsup_feat
)) {
2938 fnvlist_add_nvlist(spa
->spa_load_info
,
2939 ZPOOL_CONFIG_UNSUP_FEAT
, unsup_feat
);
2942 fnvlist_free(enabled_feat
);
2943 fnvlist_free(unsup_feat
);
2945 if (!missing_feat_read
) {
2946 fnvlist_add_boolean(spa
->spa_load_info
,
2947 ZPOOL_CONFIG_CAN_RDONLY
);
2951 * If the state is SPA_LOAD_TRYIMPORT, our objective is
2952 * twofold: to determine whether the pool is available for
2953 * import in read-write mode and (if it is not) whether the
2954 * pool is available for import in read-only mode. If the pool
2955 * is available for import in read-write mode, it is displayed
2956 * as available in userland; if it is not available for import
2957 * in read-only mode, it is displayed as unavailable in
2958 * userland. If the pool is available for import in read-only
2959 * mode but not read-write mode, it is displayed as unavailable
2960 * in userland with a special note that the pool is actually
2961 * available for open in read-only mode.
2963 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are
2964 * missing a feature for write, we must first determine whether
2965 * the pool can be opened read-only before returning to
2966 * userland in order to know whether to display the
2967 * abovementioned note.
2969 if (missing_feat_read
|| (*missing_feat_writep
&&
2970 spa_writeable(spa
))) {
2971 spa_load_failed(spa
, "pool uses unsupported features");
2972 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
,
2977 * Load refcounts for ZFS features from disk into an in-memory
2978 * cache during SPA initialization.
2980 for (spa_feature_t i
= 0; i
< SPA_FEATURES
; i
++) {
2983 error
= feature_get_refcount_from_disk(spa
,
2984 &spa_feature_table
[i
], &refcount
);
2986 spa
->spa_feat_refcount_cache
[i
] = refcount
;
2987 } else if (error
== ENOTSUP
) {
2988 spa
->spa_feat_refcount_cache
[i
] =
2989 SPA_FEATURE_DISABLED
;
2991 spa_load_failed(spa
, "error getting refcount "
2992 "for feature %s [error=%d]",
2993 spa_feature_table
[i
].fi_guid
, error
);
2994 return (spa_vdev_err(rvd
,
2995 VDEV_AUX_CORRUPT_DATA
, EIO
));
3000 if (spa_feature_is_active(spa
, SPA_FEATURE_ENABLED_TXG
)) {
3001 if (spa_dir_prop(spa
, DMU_POOL_FEATURE_ENABLED_TXG
,
3002 &spa
->spa_feat_enabled_txg_obj
, B_TRUE
) != 0)
3003 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3010 spa_ld_load_special_directories(spa_t
*spa
)
3013 vdev_t
*rvd
= spa
->spa_root_vdev
;
3015 spa
->spa_is_initializing
= B_TRUE
;
3016 error
= dsl_pool_open(spa
->spa_dsl_pool
);
3017 spa
->spa_is_initializing
= B_FALSE
;
3019 spa_load_failed(spa
, "dsl_pool_open failed [error=%d]", error
);
3020 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3027 spa_ld_get_props(spa_t
*spa
)
3031 vdev_t
*rvd
= spa
->spa_root_vdev
;
3033 /* Grab the secret checksum salt from the MOS. */
3034 error
= zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
3035 DMU_POOL_CHECKSUM_SALT
, 1,
3036 sizeof (spa
->spa_cksum_salt
.zcs_bytes
),
3037 spa
->spa_cksum_salt
.zcs_bytes
);
3038 if (error
== ENOENT
) {
3039 /* Generate a new salt for subsequent use */
3040 (void) random_get_pseudo_bytes(spa
->spa_cksum_salt
.zcs_bytes
,
3041 sizeof (spa
->spa_cksum_salt
.zcs_bytes
));
3042 } else if (error
!= 0) {
3043 spa_load_failed(spa
, "unable to retrieve checksum salt from "
3044 "MOS [error=%d]", error
);
3045 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3048 if (spa_dir_prop(spa
, DMU_POOL_SYNC_BPOBJ
, &obj
, B_TRUE
) != 0)
3049 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3050 error
= bpobj_open(&spa
->spa_deferred_bpobj
, spa
->spa_meta_objset
, obj
);
3052 spa_load_failed(spa
, "error opening deferred-frees bpobj "
3053 "[error=%d]", error
);
3054 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3058 * Load the bit that tells us to use the new accounting function
3059 * (raid-z deflation). If we have an older pool, this will not
3062 error
= spa_dir_prop(spa
, DMU_POOL_DEFLATE
, &spa
->spa_deflate
, B_FALSE
);
3063 if (error
!= 0 && error
!= ENOENT
)
3064 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3066 error
= spa_dir_prop(spa
, DMU_POOL_CREATION_VERSION
,
3067 &spa
->spa_creation_version
, B_FALSE
);
3068 if (error
!= 0 && error
!= ENOENT
)
3069 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3072 * Load the persistent error log. If we have an older pool, this will
3075 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_LAST
, &spa
->spa_errlog_last
,
3077 if (error
!= 0 && error
!= ENOENT
)
3078 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3080 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_SCRUB
,
3081 &spa
->spa_errlog_scrub
, B_FALSE
);
3082 if (error
!= 0 && error
!= ENOENT
)
3083 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3086 * Load the history object. If we have an older pool, this
3087 * will not be present.
3089 error
= spa_dir_prop(spa
, DMU_POOL_HISTORY
, &spa
->spa_history
, B_FALSE
);
3090 if (error
!= 0 && error
!= ENOENT
)
3091 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3094 * Load the per-vdev ZAP map. If we have an older pool, this will not
3095 * be present; in this case, defer its creation to a later time to
3096 * avoid dirtying the MOS this early / out of sync context. See
3097 * spa_sync_config_object.
3100 /* The sentinel is only available in the MOS config. */
3101 nvlist_t
*mos_config
;
3102 if (load_nvlist(spa
, spa
->spa_config_object
, &mos_config
) != 0) {
3103 spa_load_failed(spa
, "unable to retrieve MOS config");
3104 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3107 error
= spa_dir_prop(spa
, DMU_POOL_VDEV_ZAP_MAP
,
3108 &spa
->spa_all_vdev_zaps
, B_FALSE
);
3110 if (error
== ENOENT
) {
3111 VERIFY(!nvlist_exists(mos_config
,
3112 ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS
));
3113 spa
->spa_avz_action
= AVZ_ACTION_INITIALIZE
;
3114 ASSERT0(vdev_count_verify_zaps(spa
->spa_root_vdev
));
3115 } else if (error
!= 0) {
3116 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3117 } else if (!nvlist_exists(mos_config
, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS
)) {
3119 * An older version of ZFS overwrote the sentinel value, so
3120 * we have orphaned per-vdev ZAPs in the MOS. Defer their
3121 * destruction to later; see spa_sync_config_object.
3123 spa
->spa_avz_action
= AVZ_ACTION_DESTROY
;
3125 * We're assuming that no vdevs have had their ZAPs created
3126 * before this. Better be sure of it.
3128 ASSERT0(vdev_count_verify_zaps(spa
->spa_root_vdev
));
3130 nvlist_free(mos_config
);
3132 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
3134 error
= spa_dir_prop(spa
, DMU_POOL_PROPS
, &spa
->spa_pool_props_object
,
3136 if (error
&& error
!= ENOENT
)
3137 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3140 uint64_t autoreplace
;
3142 spa_prop_find(spa
, ZPOOL_PROP_BOOTFS
, &spa
->spa_bootfs
);
3143 spa_prop_find(spa
, ZPOOL_PROP_AUTOREPLACE
, &autoreplace
);
3144 spa_prop_find(spa
, ZPOOL_PROP_DELEGATION
, &spa
->spa_delegation
);
3145 spa_prop_find(spa
, ZPOOL_PROP_FAILUREMODE
, &spa
->spa_failmode
);
3146 spa_prop_find(spa
, ZPOOL_PROP_AUTOEXPAND
, &spa
->spa_autoexpand
);
3147 spa_prop_find(spa
, ZPOOL_PROP_DEDUPDITTO
,
3148 &spa
->spa_dedup_ditto
);
3150 spa
->spa_autoreplace
= (autoreplace
!= 0);
3154 * If we are importing a pool with missing top-level vdevs,
3155 * we enforce that the pool doesn't panic or get suspended on
3156 * error since the likelihood of missing data is extremely high.
3158 if (spa
->spa_missing_tvds
> 0 &&
3159 spa
->spa_failmode
!= ZIO_FAILURE_MODE_CONTINUE
&&
3160 spa
->spa_load_state
!= SPA_LOAD_TRYIMPORT
) {
3161 spa_load_note(spa
, "forcing failmode to 'continue' "
3162 "as some top level vdevs are missing");
3163 spa
->spa_failmode
= ZIO_FAILURE_MODE_CONTINUE
;
3170 spa_ld_open_aux_vdevs(spa_t
*spa
, spa_import_type_t type
)
3173 vdev_t
*rvd
= spa
->spa_root_vdev
;
3176 * If we're assembling the pool from the split-off vdevs of
3177 * an existing pool, we don't want to attach the spares & cache
3182 * Load any hot spares for this pool.
3184 error
= spa_dir_prop(spa
, DMU_POOL_SPARES
, &spa
->spa_spares
.sav_object
,
3186 if (error
!= 0 && error
!= ENOENT
)
3187 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3188 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
3189 ASSERT(spa_version(spa
) >= SPA_VERSION_SPARES
);
3190 if (load_nvlist(spa
, spa
->spa_spares
.sav_object
,
3191 &spa
->spa_spares
.sav_config
) != 0) {
3192 spa_load_failed(spa
, "error loading spares nvlist");
3193 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3196 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3197 spa_load_spares(spa
);
3198 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3199 } else if (error
== 0) {
3200 spa
->spa_spares
.sav_sync
= B_TRUE
;
3204 * Load any level 2 ARC devices for this pool.
3206 error
= spa_dir_prop(spa
, DMU_POOL_L2CACHE
,
3207 &spa
->spa_l2cache
.sav_object
, B_FALSE
);
3208 if (error
!= 0 && error
!= ENOENT
)
3209 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3210 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
3211 ASSERT(spa_version(spa
) >= SPA_VERSION_L2CACHE
);
3212 if (load_nvlist(spa
, spa
->spa_l2cache
.sav_object
,
3213 &spa
->spa_l2cache
.sav_config
) != 0) {
3214 spa_load_failed(spa
, "error loading l2cache nvlist");
3215 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3218 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3219 spa_load_l2cache(spa
);
3220 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3221 } else if (error
== 0) {
3222 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3229 spa_ld_load_vdev_metadata(spa_t
*spa
)
3232 vdev_t
*rvd
= spa
->spa_root_vdev
;
3235 * If the 'autoreplace' property is set, then post a resource notifying
3236 * the ZFS DE that it should not issue any faults for unopenable
3237 * devices. We also iterate over the vdevs, and post a sysevent for any
3238 * unopenable vdevs so that the normal autoreplace handler can take
3241 if (spa
->spa_autoreplace
&& spa
->spa_load_state
!= SPA_LOAD_TRYIMPORT
) {
3242 spa_check_removed(spa
->spa_root_vdev
);
3244 * For the import case, this is done in spa_import(), because
3245 * at this point we're using the spare definitions from
3246 * the MOS config, not necessarily from the userland config.
3248 if (spa
->spa_load_state
!= SPA_LOAD_IMPORT
) {
3249 spa_aux_check_removed(&spa
->spa_spares
);
3250 spa_aux_check_removed(&spa
->spa_l2cache
);
3255 * Load the vdev metadata such as metaslabs, DTLs, spacemap object, etc.
3257 error
= vdev_load(rvd
);
3259 spa_load_failed(spa
, "vdev_load failed [error=%d]", error
);
3260 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, error
));
3264 * Propagate the leaf DTLs we just loaded all the way up the vdev tree.
3266 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3267 vdev_dtl_reassess(rvd
, 0, 0, B_FALSE
);
3268 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3274 spa_ld_load_dedup_tables(spa_t
*spa
)
3277 vdev_t
*rvd
= spa
->spa_root_vdev
;
3279 error
= ddt_load(spa
);
3281 spa_load_failed(spa
, "ddt_load failed [error=%d]", error
);
3282 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
3289 spa_ld_verify_logs(spa_t
*spa
, spa_import_type_t type
, char **ereport
)
3291 vdev_t
*rvd
= spa
->spa_root_vdev
;
3293 if (type
!= SPA_IMPORT_ASSEMBLE
&& spa_writeable(spa
)) {
3294 boolean_t missing
= spa_check_logs(spa
);
3296 if (spa
->spa_missing_tvds
!= 0) {
3297 spa_load_note(spa
, "spa_check_logs failed "
3298 "so dropping the logs");
3300 *ereport
= FM_EREPORT_ZFS_LOG_REPLAY
;
3301 spa_load_failed(spa
, "spa_check_logs failed");
3302 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_LOG
,
3312 spa_ld_verify_pool_data(spa_t
*spa
)
3315 vdev_t
*rvd
= spa
->spa_root_vdev
;
3318 * We've successfully opened the pool, verify that we're ready
3319 * to start pushing transactions.
3321 if (spa
->spa_load_state
!= SPA_LOAD_TRYIMPORT
) {
3322 error
= spa_load_verify(spa
);
3324 spa_load_failed(spa
, "spa_load_verify failed "
3325 "[error=%d]", error
);
3326 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
3335 spa_ld_claim_log_blocks(spa_t
*spa
)
3338 dsl_pool_t
*dp
= spa_get_dsl(spa
);
3341 * Claim log blocks that haven't been committed yet.
3342 * This must all happen in a single txg.
3343 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
3344 * invoked from zil_claim_log_block()'s i/o done callback.
3345 * Price of rollback is that we abandon the log.
3347 spa
->spa_claiming
= B_TRUE
;
3349 tx
= dmu_tx_create_assigned(dp
, spa_first_txg(spa
));
3350 (void) dmu_objset_find_dp(dp
, dp
->dp_root_dir_obj
,
3351 zil_claim
, tx
, DS_FIND_CHILDREN
);
3354 spa
->spa_claiming
= B_FALSE
;
3356 spa_set_log_state(spa
, SPA_LOG_GOOD
);
3360 spa_ld_check_for_config_update(spa_t
*spa
, uint64_t config_cache_txg
,
3361 boolean_t update_config_cache
)
3363 vdev_t
*rvd
= spa
->spa_root_vdev
;
3364 int need_update
= B_FALSE
;
3367 * If the config cache is stale, or we have uninitialized
3368 * metaslabs (see spa_vdev_add()), then update the config.
3370 * If this is a verbatim import, trust the current
3371 * in-core spa_config and update the disk labels.
3373 if (update_config_cache
|| config_cache_txg
!= spa
->spa_config_txg
||
3374 spa
->spa_load_state
== SPA_LOAD_IMPORT
||
3375 spa
->spa_load_state
== SPA_LOAD_RECOVER
||
3376 (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
))
3377 need_update
= B_TRUE
;
3379 for (int c
= 0; c
< rvd
->vdev_children
; c
++)
3380 if (rvd
->vdev_child
[c
]->vdev_ms_array
== 0)
3381 need_update
= B_TRUE
;
3384 * Update the config cache asychronously in case we're the
3385 * root pool, in which case the config cache isn't writable yet.
3388 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
3392 spa_ld_prepare_for_reload(spa_t
*spa
)
3394 int mode
= spa
->spa_mode
;
3395 int async_suspended
= spa
->spa_async_suspended
;
3398 spa_deactivate(spa
);
3399 spa_activate(spa
, mode
);
3402 * We save the value of spa_async_suspended as it gets reset to 0 by
3403 * spa_unload(). We want to restore it back to the original value before
3404 * returning as we might be calling spa_async_resume() later.
3406 spa
->spa_async_suspended
= async_suspended
;
3410 spa_ld_read_checkpoint_txg(spa_t
*spa
)
3412 uberblock_t checkpoint
;
3415 ASSERT0(spa
->spa_checkpoint_txg
);
3416 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
3418 error
= zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
3419 DMU_POOL_ZPOOL_CHECKPOINT
, sizeof (uint64_t),
3420 sizeof (uberblock_t
) / sizeof (uint64_t), &checkpoint
);
3422 if (error
== ENOENT
)
3428 ASSERT3U(checkpoint
.ub_txg
, !=, 0);
3429 ASSERT3U(checkpoint
.ub_checkpoint_txg
, !=, 0);
3430 ASSERT3U(checkpoint
.ub_timestamp
, !=, 0);
3431 spa
->spa_checkpoint_txg
= checkpoint
.ub_txg
;
3432 spa
->spa_checkpoint_info
.sci_timestamp
= checkpoint
.ub_timestamp
;
3438 spa_ld_mos_init(spa_t
*spa
, spa_import_type_t type
)
3442 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
3443 ASSERT(spa
->spa_config_source
!= SPA_CONFIG_SRC_NONE
);
3446 * Never trust the config that is provided unless we are assembling
3447 * a pool following a split.
3448 * This means don't trust blkptrs and the vdev tree in general. This
3449 * also effectively puts the spa in read-only mode since
3450 * spa_writeable() checks for spa_trust_config to be true.
3451 * We will later load a trusted config from the MOS.
3453 if (type
!= SPA_IMPORT_ASSEMBLE
)
3454 spa
->spa_trust_config
= B_FALSE
;
3457 * Parse the config provided to create a vdev tree.
3459 error
= spa_ld_parse_config(spa
, type
);
3464 * Now that we have the vdev tree, try to open each vdev. This involves
3465 * opening the underlying physical device, retrieving its geometry and
3466 * probing the vdev with a dummy I/O. The state of each vdev will be set
3467 * based on the success of those operations. After this we'll be ready
3468 * to read from the vdevs.
3470 error
= spa_ld_open_vdevs(spa
);
3475 * Read the label of each vdev and make sure that the GUIDs stored
3476 * there match the GUIDs in the config provided.
3477 * If we're assembling a new pool that's been split off from an
3478 * existing pool, the labels haven't yet been updated so we skip
3479 * validation for now.
3481 if (type
!= SPA_IMPORT_ASSEMBLE
) {
3482 error
= spa_ld_validate_vdevs(spa
);
3488 * Read all vdev labels to find the best uberblock (i.e. latest,
3489 * unless spa_load_max_txg is set) and store it in spa_uberblock. We
3490 * get the list of features required to read blkptrs in the MOS from
3491 * the vdev label with the best uberblock and verify that our version
3492 * of zfs supports them all.
3494 error
= spa_ld_select_uberblock(spa
, type
);
3499 * Pass that uberblock to the dsl_pool layer which will open the root
3500 * blkptr. This blkptr points to the latest version of the MOS and will
3501 * allow us to read its contents.
3503 error
= spa_ld_open_rootbp(spa
);
3511 spa_ld_checkpoint_rewind(spa_t
*spa
)
3513 uberblock_t checkpoint
;
3516 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
3517 ASSERT(spa
->spa_import_flags
& ZFS_IMPORT_CHECKPOINT
);
3519 error
= zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
3520 DMU_POOL_ZPOOL_CHECKPOINT
, sizeof (uint64_t),
3521 sizeof (uberblock_t
) / sizeof (uint64_t), &checkpoint
);
3524 spa_load_failed(spa
, "unable to retrieve checkpointed "
3525 "uberblock from the MOS config [error=%d]", error
);
3527 if (error
== ENOENT
)
3528 error
= ZFS_ERR_NO_CHECKPOINT
;
3533 ASSERT3U(checkpoint
.ub_txg
, <, spa
->spa_uberblock
.ub_txg
);
3534 ASSERT3U(checkpoint
.ub_txg
, ==, checkpoint
.ub_checkpoint_txg
);
3537 * We need to update the txg and timestamp of the checkpointed
3538 * uberblock to be higher than the latest one. This ensures that
3539 * the checkpointed uberblock is selected if we were to close and
3540 * reopen the pool right after we've written it in the vdev labels.
3541 * (also see block comment in vdev_uberblock_compare)
3543 checkpoint
.ub_txg
= spa
->spa_uberblock
.ub_txg
+ 1;
3544 checkpoint
.ub_timestamp
= gethrestime_sec();
3547 * Set current uberblock to be the checkpointed uberblock.
3549 spa
->spa_uberblock
= checkpoint
;
3552 * If we are doing a normal rewind, then the pool is open for
3553 * writing and we sync the "updated" checkpointed uberblock to
3554 * disk. Once this is done, we've basically rewound the whole
3555 * pool and there is no way back.
3557 * There are cases when we don't want to attempt and sync the
3558 * checkpointed uberblock to disk because we are opening a
3559 * pool as read-only. Specifically, verifying the checkpointed
3560 * state with zdb, and importing the checkpointed state to get
3561 * a "preview" of its content.
3563 if (spa_writeable(spa
)) {
3564 vdev_t
*rvd
= spa
->spa_root_vdev
;
3566 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3567 vdev_t
*svd
[SPA_SYNC_MIN_VDEVS
] = { NULL
};
3569 int children
= rvd
->vdev_children
;
3570 int c0
= spa_get_random(children
);
3572 for (int c
= 0; c
< children
; c
++) {
3573 vdev_t
*vd
= rvd
->vdev_child
[(c0
+ c
) % children
];
3575 /* Stop when revisiting the first vdev */
3576 if (c
> 0 && svd
[0] == vd
)
3579 if (vd
->vdev_ms_array
== 0 || vd
->vdev_islog
||
3580 !vdev_is_concrete(vd
))
3583 svd
[svdcount
++] = vd
;
3584 if (svdcount
== SPA_SYNC_MIN_VDEVS
)
3587 error
= vdev_config_sync(svd
, svdcount
, spa
->spa_first_txg
);
3589 spa
->spa_last_synced_guid
= rvd
->vdev_guid
;
3590 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3593 spa_load_failed(spa
, "failed to write checkpointed "
3594 "uberblock to the vdev labels [error=%d]", error
);
3603 spa_ld_mos_with_trusted_config(spa_t
*spa
, spa_import_type_t type
,
3604 boolean_t
*update_config_cache
)
3609 * Parse the config for pool, open and validate vdevs,
3610 * select an uberblock, and use that uberblock to open
3613 error
= spa_ld_mos_init(spa
, type
);
3618 * Retrieve the trusted config stored in the MOS and use it to create
3619 * a new, exact version of the vdev tree, then reopen all vdevs.
3621 error
= spa_ld_trusted_config(spa
, type
, B_FALSE
);
3622 if (error
== EAGAIN
) {
3623 if (update_config_cache
!= NULL
)
3624 *update_config_cache
= B_TRUE
;
3627 * Redo the loading process with the trusted config if it is
3628 * too different from the untrusted config.
3630 spa_ld_prepare_for_reload(spa
);
3631 spa_load_note(spa
, "RELOADING");
3632 error
= spa_ld_mos_init(spa
, type
);
3636 error
= spa_ld_trusted_config(spa
, type
, B_TRUE
);
3640 } else if (error
!= 0) {
3648 * Load an existing storage pool, using the config provided. This config
3649 * describes which vdevs are part of the pool and is later validated against
3650 * partial configs present in each vdev's label and an entire copy of the
3651 * config stored in the MOS.
3654 spa_load_impl(spa_t
*spa
, spa_import_type_t type
, char **ereport
)
3657 boolean_t missing_feat_write
= B_FALSE
;
3658 boolean_t checkpoint_rewind
=
3659 (spa
->spa_import_flags
& ZFS_IMPORT_CHECKPOINT
);
3660 boolean_t update_config_cache
= B_FALSE
;
3662 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
3663 ASSERT(spa
->spa_config_source
!= SPA_CONFIG_SRC_NONE
);
3665 spa_load_note(spa
, "LOADING");
3667 error
= spa_ld_mos_with_trusted_config(spa
, type
, &update_config_cache
);
3672 * If we are rewinding to the checkpoint then we need to repeat
3673 * everything we've done so far in this function but this time
3674 * selecting the checkpointed uberblock and using that to open
3677 if (checkpoint_rewind
) {
3679 * If we are rewinding to the checkpoint update config cache
3682 update_config_cache
= B_TRUE
;
3685 * Extract the checkpointed uberblock from the current MOS
3686 * and use this as the pool's uberblock from now on. If the
3687 * pool is imported as writeable we also write the checkpoint
3688 * uberblock to the labels, making the rewind permanent.
3690 error
= spa_ld_checkpoint_rewind(spa
);
3695 * Redo the loading process process again with the
3696 * checkpointed uberblock.
3698 spa_ld_prepare_for_reload(spa
);
3699 spa_load_note(spa
, "LOADING checkpointed uberblock");
3700 error
= spa_ld_mos_with_trusted_config(spa
, type
, NULL
);
3706 * Retrieve the checkpoint txg if the pool has a checkpoint.
3708 error
= spa_ld_read_checkpoint_txg(spa
);
3713 * Retrieve the mapping of indirect vdevs. Those vdevs were removed
3714 * from the pool and their contents were re-mapped to other vdevs. Note
3715 * that everything that we read before this step must have been
3716 * rewritten on concrete vdevs after the last device removal was
3717 * initiated. Otherwise we could be reading from indirect vdevs before
3718 * we have loaded their mappings.
3720 error
= spa_ld_open_indirect_vdev_metadata(spa
);
3725 * Retrieve the full list of active features from the MOS and check if
3726 * they are all supported.
3728 error
= spa_ld_check_features(spa
, &missing_feat_write
);
3733 * Load several special directories from the MOS needed by the dsl_pool
3736 error
= spa_ld_load_special_directories(spa
);
3741 * Retrieve pool properties from the MOS.
3743 error
= spa_ld_get_props(spa
);
3748 * Retrieve the list of auxiliary devices - cache devices and spares -
3751 error
= spa_ld_open_aux_vdevs(spa
, type
);
3756 * Load the metadata for all vdevs. Also check if unopenable devices
3757 * should be autoreplaced.
3759 error
= spa_ld_load_vdev_metadata(spa
);
3763 error
= spa_ld_load_dedup_tables(spa
);
3768 * Verify the logs now to make sure we don't have any unexpected errors
3769 * when we claim log blocks later.
3771 error
= spa_ld_verify_logs(spa
, type
, ereport
);
3775 if (missing_feat_write
) {
3776 ASSERT(spa
->spa_load_state
== SPA_LOAD_TRYIMPORT
);
3779 * At this point, we know that we can open the pool in
3780 * read-only mode but not read-write mode. We now have enough
3781 * information and can return to userland.
3783 return (spa_vdev_err(spa
->spa_root_vdev
, VDEV_AUX_UNSUP_FEAT
,
3788 * Traverse the last txgs to make sure the pool was left off in a safe
3789 * state. When performing an extreme rewind, we verify the whole pool,
3790 * which can take a very long time.
3792 error
= spa_ld_verify_pool_data(spa
);
3797 * Calculate the deflated space for the pool. This must be done before
3798 * we write anything to the pool because we'd need to update the space
3799 * accounting using the deflated sizes.
3801 spa_update_dspace(spa
);
3804 * We have now retrieved all the information we needed to open the
3805 * pool. If we are importing the pool in read-write mode, a few
3806 * additional steps must be performed to finish the import.
3808 if (spa_writeable(spa
) && (spa
->spa_load_state
== SPA_LOAD_RECOVER
||
3809 spa
->spa_load_max_txg
== UINT64_MAX
)) {
3810 uint64_t config_cache_txg
= spa
->spa_config_txg
;
3812 ASSERT(spa
->spa_load_state
!= SPA_LOAD_TRYIMPORT
);
3815 * In case of a checkpoint rewind, log the original txg
3816 * of the checkpointed uberblock.
3818 if (checkpoint_rewind
) {
3819 spa_history_log_internal(spa
, "checkpoint rewind",
3820 NULL
, "rewound state to txg=%llu",
3821 (u_longlong_t
)spa
->spa_uberblock
.ub_checkpoint_txg
);
3825 * Traverse the ZIL and claim all blocks.
3827 spa_ld_claim_log_blocks(spa
);
3830 * Kick-off the syncing thread.
3832 spa
->spa_sync_on
= B_TRUE
;
3833 txg_sync_start(spa
->spa_dsl_pool
);
3836 * Wait for all claims to sync. We sync up to the highest
3837 * claimed log block birth time so that claimed log blocks
3838 * don't appear to be from the future. spa_claim_max_txg
3839 * will have been set for us by ZIL traversal operations
3842 txg_wait_synced(spa
->spa_dsl_pool
, spa
->spa_claim_max_txg
);
3845 * Check if we need to request an update of the config. On the
3846 * next sync, we would update the config stored in vdev labels
3847 * and the cachefile (by default /etc/zfs/zpool.cache).
3849 spa_ld_check_for_config_update(spa
, config_cache_txg
,
3850 update_config_cache
);
3853 * Check all DTLs to see if anything needs resilvering.
3855 if (!dsl_scan_resilvering(spa
->spa_dsl_pool
) &&
3856 vdev_resilver_needed(spa
->spa_root_vdev
, NULL
, NULL
))
3857 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
3860 * Log the fact that we booted up (so that we can detect if
3861 * we rebooted in the middle of an operation).
3863 spa_history_log_version(spa
, "open");
3866 * Delete any inconsistent datasets.
3868 (void) dmu_objset_find(spa_name(spa
),
3869 dsl_destroy_inconsistent
, NULL
, DS_FIND_CHILDREN
);
3872 * Clean up any stale temporary dataset userrefs.
3874 dsl_pool_clean_tmp_userrefs(spa
->spa_dsl_pool
);
3876 spa_restart_removal(spa
);
3878 spa_spawn_aux_threads(spa
);
3880 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3881 vdev_initialize_restart(spa
->spa_root_vdev
);
3882 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3885 spa_load_note(spa
, "LOADED");
3891 spa_load_retry(spa_t
*spa
, spa_load_state_t state
)
3893 int mode
= spa
->spa_mode
;
3896 spa_deactivate(spa
);
3898 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
- 1;
3900 spa_activate(spa
, mode
);
3901 spa_async_suspend(spa
);
3903 spa_load_note(spa
, "spa_load_retry: rewind, max txg: %llu",
3904 (u_longlong_t
)spa
->spa_load_max_txg
);
3906 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
));
3910 * If spa_load() fails this function will try loading prior txg's. If
3911 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool
3912 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this
3913 * function will not rewind the pool and will return the same error as
3917 spa_load_best(spa_t
*spa
, spa_load_state_t state
, uint64_t max_request
,
3920 nvlist_t
*loadinfo
= NULL
;
3921 nvlist_t
*config
= NULL
;
3922 int load_error
, rewind_error
;
3923 uint64_t safe_rewind_txg
;
3926 if (spa
->spa_load_txg
&& state
== SPA_LOAD_RECOVER
) {
3927 spa
->spa_load_max_txg
= spa
->spa_load_txg
;
3928 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
3930 spa
->spa_load_max_txg
= max_request
;
3931 if (max_request
!= UINT64_MAX
)
3932 spa
->spa_extreme_rewind
= B_TRUE
;
3935 load_error
= rewind_error
= spa_load(spa
, state
, SPA_IMPORT_EXISTING
);
3936 if (load_error
== 0)
3938 if (load_error
== ZFS_ERR_NO_CHECKPOINT
) {
3940 * When attempting checkpoint-rewind on a pool with no
3941 * checkpoint, we should not attempt to load uberblocks
3942 * from previous txgs when spa_load fails.
3944 ASSERT(spa
->spa_import_flags
& ZFS_IMPORT_CHECKPOINT
);
3945 return (load_error
);
3948 if (spa
->spa_root_vdev
!= NULL
)
3949 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
3951 spa
->spa_last_ubsync_txg
= spa
->spa_uberblock
.ub_txg
;
3952 spa
->spa_last_ubsync_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
3954 if (rewind_flags
& ZPOOL_NEVER_REWIND
) {
3955 nvlist_free(config
);
3956 return (load_error
);
3959 if (state
== SPA_LOAD_RECOVER
) {
3960 /* Price of rolling back is discarding txgs, including log */
3961 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
3964 * If we aren't rolling back save the load info from our first
3965 * import attempt so that we can restore it after attempting
3968 loadinfo
= spa
->spa_load_info
;
3969 spa
->spa_load_info
= fnvlist_alloc();
3972 spa
->spa_load_max_txg
= spa
->spa_last_ubsync_txg
;
3973 safe_rewind_txg
= spa
->spa_last_ubsync_txg
- TXG_DEFER_SIZE
;
3974 min_txg
= (rewind_flags
& ZPOOL_EXTREME_REWIND
) ?
3975 TXG_INITIAL
: safe_rewind_txg
;
3978 * Continue as long as we're finding errors, we're still within
3979 * the acceptable rewind range, and we're still finding uberblocks
3981 while (rewind_error
&& spa
->spa_uberblock
.ub_txg
>= min_txg
&&
3982 spa
->spa_uberblock
.ub_txg
<= spa
->spa_load_max_txg
) {
3983 if (spa
->spa_load_max_txg
< safe_rewind_txg
)
3984 spa
->spa_extreme_rewind
= B_TRUE
;
3985 rewind_error
= spa_load_retry(spa
, state
);
3988 spa
->spa_extreme_rewind
= B_FALSE
;
3989 spa
->spa_load_max_txg
= UINT64_MAX
;
3991 if (config
&& (rewind_error
|| state
!= SPA_LOAD_RECOVER
))
3992 spa_config_set(spa
, config
);
3994 nvlist_free(config
);
3996 if (state
== SPA_LOAD_RECOVER
) {
3997 ASSERT3P(loadinfo
, ==, NULL
);
3998 return (rewind_error
);
4000 /* Store the rewind info as part of the initial load info */
4001 fnvlist_add_nvlist(loadinfo
, ZPOOL_CONFIG_REWIND_INFO
,
4002 spa
->spa_load_info
);
4004 /* Restore the initial load info */
4005 fnvlist_free(spa
->spa_load_info
);
4006 spa
->spa_load_info
= loadinfo
;
4008 return (load_error
);
4015 * The import case is identical to an open except that the configuration is sent
4016 * down from userland, instead of grabbed from the configuration cache. For the
4017 * case of an open, the pool configuration will exist in the
4018 * POOL_STATE_UNINITIALIZED state.
4020 * The stats information (gen/count/ustats) is used to gather vdev statistics at
4021 * the same time open the pool, without having to keep around the spa_t in some
4025 spa_open_common(const char *pool
, spa_t
**spapp
, void *tag
, nvlist_t
*nvpolicy
,
4029 spa_load_state_t state
= SPA_LOAD_OPEN
;
4031 int locked
= B_FALSE
;
4036 * As disgusting as this is, we need to support recursive calls to this
4037 * function because dsl_dir_open() is called during spa_load(), and ends
4038 * up calling spa_open() again. The real fix is to figure out how to
4039 * avoid dsl_dir_open() calling this in the first place.
4041 if (mutex_owner(&spa_namespace_lock
) != curthread
) {
4042 mutex_enter(&spa_namespace_lock
);
4046 if ((spa
= spa_lookup(pool
)) == NULL
) {
4048 mutex_exit(&spa_namespace_lock
);
4049 return (SET_ERROR(ENOENT
));
4052 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
) {
4053 zpool_load_policy_t policy
;
4055 zpool_get_load_policy(nvpolicy
? nvpolicy
: spa
->spa_config
,
4057 if (policy
.zlp_rewind
& ZPOOL_DO_REWIND
)
4058 state
= SPA_LOAD_RECOVER
;
4060 spa_activate(spa
, spa_mode_global
);
4062 if (state
!= SPA_LOAD_RECOVER
)
4063 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
4064 spa
->spa_config_source
= SPA_CONFIG_SRC_CACHEFILE
;
4066 zfs_dbgmsg("spa_open_common: opening %s", pool
);
4067 error
= spa_load_best(spa
, state
, policy
.zlp_txg
,
4070 if (error
== EBADF
) {
4072 * If vdev_validate() returns failure (indicated by
4073 * EBADF), it indicates that one of the vdevs indicates
4074 * that the pool has been exported or destroyed. If
4075 * this is the case, the config cache is out of sync and
4076 * we should remove the pool from the namespace.
4079 spa_deactivate(spa
);
4080 spa_write_cachefile(spa
, B_TRUE
, B_TRUE
);
4083 mutex_exit(&spa_namespace_lock
);
4084 return (SET_ERROR(ENOENT
));
4089 * We can't open the pool, but we still have useful
4090 * information: the state of each vdev after the
4091 * attempted vdev_open(). Return this to the user.
4093 if (config
!= NULL
&& spa
->spa_config
) {
4094 VERIFY(nvlist_dup(spa
->spa_config
, config
,
4096 VERIFY(nvlist_add_nvlist(*config
,
4097 ZPOOL_CONFIG_LOAD_INFO
,
4098 spa
->spa_load_info
) == 0);
4101 spa_deactivate(spa
);
4102 spa
->spa_last_open_failed
= error
;
4104 mutex_exit(&spa_namespace_lock
);
4110 spa_open_ref(spa
, tag
);
4113 *config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
4116 * If we've recovered the pool, pass back any information we
4117 * gathered while doing the load.
4119 if (state
== SPA_LOAD_RECOVER
) {
4120 VERIFY(nvlist_add_nvlist(*config
, ZPOOL_CONFIG_LOAD_INFO
,
4121 spa
->spa_load_info
) == 0);
4125 spa
->spa_last_open_failed
= 0;
4126 spa
->spa_last_ubsync_txg
= 0;
4127 spa
->spa_load_txg
= 0;
4128 mutex_exit(&spa_namespace_lock
);
4137 spa_open_rewind(const char *name
, spa_t
**spapp
, void *tag
, nvlist_t
*policy
,
4140 return (spa_open_common(name
, spapp
, tag
, policy
, config
));
4144 spa_open(const char *name
, spa_t
**spapp
, void *tag
)
4146 return (spa_open_common(name
, spapp
, tag
, NULL
, NULL
));
4150 * Lookup the given spa_t, incrementing the inject count in the process,
4151 * preventing it from being exported or destroyed.
4154 spa_inject_addref(char *name
)
4158 mutex_enter(&spa_namespace_lock
);
4159 if ((spa
= spa_lookup(name
)) == NULL
) {
4160 mutex_exit(&spa_namespace_lock
);
4163 spa
->spa_inject_ref
++;
4164 mutex_exit(&spa_namespace_lock
);
4170 spa_inject_delref(spa_t
*spa
)
4172 mutex_enter(&spa_namespace_lock
);
4173 spa
->spa_inject_ref
--;
4174 mutex_exit(&spa_namespace_lock
);
4178 * Add spares device information to the nvlist.
4181 spa_add_spares(spa_t
*spa
, nvlist_t
*config
)
4191 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
4193 if (spa
->spa_spares
.sav_count
== 0)
4196 VERIFY(nvlist_lookup_nvlist(config
,
4197 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
4198 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
4199 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
4201 VERIFY(nvlist_add_nvlist_array(nvroot
,
4202 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
4203 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
4204 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
4207 * Go through and find any spares which have since been
4208 * repurposed as an active spare. If this is the case, update
4209 * their status appropriately.
4211 for (i
= 0; i
< nspares
; i
++) {
4212 VERIFY(nvlist_lookup_uint64(spares
[i
],
4213 ZPOOL_CONFIG_GUID
, &guid
) == 0);
4214 if (spa_spare_exists(guid
, &pool
, NULL
) &&
4216 VERIFY(nvlist_lookup_uint64_array(
4217 spares
[i
], ZPOOL_CONFIG_VDEV_STATS
,
4218 (uint64_t **)&vs
, &vsc
) == 0);
4219 vs
->vs_state
= VDEV_STATE_CANT_OPEN
;
4220 vs
->vs_aux
= VDEV_AUX_SPARED
;
4227 * Add l2cache device information to the nvlist, including vdev stats.
4230 spa_add_l2cache(spa_t
*spa
, nvlist_t
*config
)
4233 uint_t i
, j
, nl2cache
;
4240 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
4242 if (spa
->spa_l2cache
.sav_count
== 0)
4245 VERIFY(nvlist_lookup_nvlist(config
,
4246 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
4247 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
4248 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
4249 if (nl2cache
!= 0) {
4250 VERIFY(nvlist_add_nvlist_array(nvroot
,
4251 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
4252 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
4253 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
4256 * Update level 2 cache device stats.
4259 for (i
= 0; i
< nl2cache
; i
++) {
4260 VERIFY(nvlist_lookup_uint64(l2cache
[i
],
4261 ZPOOL_CONFIG_GUID
, &guid
) == 0);
4264 for (j
= 0; j
< spa
->spa_l2cache
.sav_count
; j
++) {
4266 spa
->spa_l2cache
.sav_vdevs
[j
]->vdev_guid
) {
4267 vd
= spa
->spa_l2cache
.sav_vdevs
[j
];
4273 VERIFY(nvlist_lookup_uint64_array(l2cache
[i
],
4274 ZPOOL_CONFIG_VDEV_STATS
, (uint64_t **)&vs
, &vsc
)
4276 vdev_get_stats(vd
, vs
);
4282 spa_add_feature_stats(spa_t
*spa
, nvlist_t
*config
)
4288 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
4289 VERIFY(nvlist_alloc(&features
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4291 if (spa
->spa_feat_for_read_obj
!= 0) {
4292 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
4293 spa
->spa_feat_for_read_obj
);
4294 zap_cursor_retrieve(&zc
, &za
) == 0;
4295 zap_cursor_advance(&zc
)) {
4296 ASSERT(za
.za_integer_length
== sizeof (uint64_t) &&
4297 za
.za_num_integers
== 1);
4298 VERIFY3U(0, ==, nvlist_add_uint64(features
, za
.za_name
,
4299 za
.za_first_integer
));
4301 zap_cursor_fini(&zc
);
4304 if (spa
->spa_feat_for_write_obj
!= 0) {
4305 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
4306 spa
->spa_feat_for_write_obj
);
4307 zap_cursor_retrieve(&zc
, &za
) == 0;
4308 zap_cursor_advance(&zc
)) {
4309 ASSERT(za
.za_integer_length
== sizeof (uint64_t) &&
4310 za
.za_num_integers
== 1);
4311 VERIFY3U(0, ==, nvlist_add_uint64(features
, za
.za_name
,
4312 za
.za_first_integer
));
4314 zap_cursor_fini(&zc
);
4317 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_FEATURE_STATS
,
4319 nvlist_free(features
);
4323 spa_get_stats(const char *name
, nvlist_t
**config
,
4324 char *altroot
, size_t buflen
)
4330 error
= spa_open_common(name
, &spa
, FTAG
, NULL
, config
);
4334 * This still leaves a window of inconsistency where the spares
4335 * or l2cache devices could change and the config would be
4336 * self-inconsistent.
4338 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
4340 if (*config
!= NULL
) {
4341 uint64_t loadtimes
[2];
4343 loadtimes
[0] = spa
->spa_loaded_ts
.tv_sec
;
4344 loadtimes
[1] = spa
->spa_loaded_ts
.tv_nsec
;
4345 VERIFY(nvlist_add_uint64_array(*config
,
4346 ZPOOL_CONFIG_LOADED_TIME
, loadtimes
, 2) == 0);
4348 VERIFY(nvlist_add_uint64(*config
,
4349 ZPOOL_CONFIG_ERRCOUNT
,
4350 spa_get_errlog_size(spa
)) == 0);
4352 if (spa_suspended(spa
))
4353 VERIFY(nvlist_add_uint64(*config
,
4354 ZPOOL_CONFIG_SUSPENDED
,
4355 spa
->spa_failmode
) == 0);
4357 spa_add_spares(spa
, *config
);
4358 spa_add_l2cache(spa
, *config
);
4359 spa_add_feature_stats(spa
, *config
);
4364 * We want to get the alternate root even for faulted pools, so we cheat
4365 * and call spa_lookup() directly.
4369 mutex_enter(&spa_namespace_lock
);
4370 spa
= spa_lookup(name
);
4372 spa_altroot(spa
, altroot
, buflen
);
4376 mutex_exit(&spa_namespace_lock
);
4378 spa_altroot(spa
, altroot
, buflen
);
4383 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
4384 spa_close(spa
, FTAG
);
4391 * Validate that the auxiliary device array is well formed. We must have an
4392 * array of nvlists, each which describes a valid leaf vdev. If this is an
4393 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
4394 * specified, as long as they are well-formed.
4397 spa_validate_aux_devs(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
,
4398 spa_aux_vdev_t
*sav
, const char *config
, uint64_t version
,
4399 vdev_labeltype_t label
)
4406 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
4409 * It's acceptable to have no devs specified.
4411 if (nvlist_lookup_nvlist_array(nvroot
, config
, &dev
, &ndev
) != 0)
4415 return (SET_ERROR(EINVAL
));
4418 * Make sure the pool is formatted with a version that supports this
4421 if (spa_version(spa
) < version
)
4422 return (SET_ERROR(ENOTSUP
));
4425 * Set the pending device list so we correctly handle device in-use
4428 sav
->sav_pending
= dev
;
4429 sav
->sav_npending
= ndev
;
4431 for (i
= 0; i
< ndev
; i
++) {
4432 if ((error
= spa_config_parse(spa
, &vd
, dev
[i
], NULL
, 0,
4436 if (!vd
->vdev_ops
->vdev_op_leaf
) {
4438 error
= SET_ERROR(EINVAL
);
4443 * The L2ARC currently only supports disk devices in
4444 * kernel context. For user-level testing, we allow it.
4447 if ((strcmp(config
, ZPOOL_CONFIG_L2CACHE
) == 0) &&
4448 strcmp(vd
->vdev_ops
->vdev_op_type
, VDEV_TYPE_DISK
) != 0) {
4449 error
= SET_ERROR(ENOTBLK
);
4456 if ((error
= vdev_open(vd
)) == 0 &&
4457 (error
= vdev_label_init(vd
, crtxg
, label
)) == 0) {
4458 VERIFY(nvlist_add_uint64(dev
[i
], ZPOOL_CONFIG_GUID
,
4459 vd
->vdev_guid
) == 0);
4465 (mode
!= VDEV_ALLOC_SPARE
&& mode
!= VDEV_ALLOC_L2CACHE
))
4472 sav
->sav_pending
= NULL
;
4473 sav
->sav_npending
= 0;
4478 spa_validate_aux(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
)
4482 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
4484 if ((error
= spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
4485 &spa
->spa_spares
, ZPOOL_CONFIG_SPARES
, SPA_VERSION_SPARES
,
4486 VDEV_LABEL_SPARE
)) != 0) {
4490 return (spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
4491 &spa
->spa_l2cache
, ZPOOL_CONFIG_L2CACHE
, SPA_VERSION_L2CACHE
,
4492 VDEV_LABEL_L2CACHE
));
4496 spa_set_aux_vdevs(spa_aux_vdev_t
*sav
, nvlist_t
**devs
, int ndevs
,
4501 if (sav
->sav_config
!= NULL
) {
4507 * Generate new dev list by concatentating with the
4510 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
, config
,
4511 &olddevs
, &oldndevs
) == 0);
4513 newdevs
= kmem_alloc(sizeof (void *) *
4514 (ndevs
+ oldndevs
), KM_SLEEP
);
4515 for (i
= 0; i
< oldndevs
; i
++)
4516 VERIFY(nvlist_dup(olddevs
[i
], &newdevs
[i
],
4518 for (i
= 0; i
< ndevs
; i
++)
4519 VERIFY(nvlist_dup(devs
[i
], &newdevs
[i
+ oldndevs
],
4522 VERIFY(nvlist_remove(sav
->sav_config
, config
,
4523 DATA_TYPE_NVLIST_ARRAY
) == 0);
4525 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
4526 config
, newdevs
, ndevs
+ oldndevs
) == 0);
4527 for (i
= 0; i
< oldndevs
+ ndevs
; i
++)
4528 nvlist_free(newdevs
[i
]);
4529 kmem_free(newdevs
, (oldndevs
+ ndevs
) * sizeof (void *));
4532 * Generate a new dev list.
4534 VERIFY(nvlist_alloc(&sav
->sav_config
, NV_UNIQUE_NAME
,
4536 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
, config
,
4542 * Stop and drop level 2 ARC devices
4545 spa_l2cache_drop(spa_t
*spa
)
4549 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
4551 for (i
= 0; i
< sav
->sav_count
; i
++) {
4554 vd
= sav
->sav_vdevs
[i
];
4557 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
4558 pool
!= 0ULL && l2arc_vdev_present(vd
))
4559 l2arc_remove_vdev(vd
);
4567 spa_create(const char *pool
, nvlist_t
*nvroot
, nvlist_t
*props
,
4571 char *altroot
= NULL
;
4576 uint64_t txg
= TXG_INITIAL
;
4577 nvlist_t
**spares
, **l2cache
;
4578 uint_t nspares
, nl2cache
;
4579 uint64_t version
, obj
;
4580 boolean_t has_features
;
4583 * If this pool already exists, return failure.
4585 mutex_enter(&spa_namespace_lock
);
4586 if (spa_lookup(pool
) != NULL
) {
4587 mutex_exit(&spa_namespace_lock
);
4588 return (SET_ERROR(EEXIST
));
4592 * Allocate a new spa_t structure.
4594 (void) nvlist_lookup_string(props
,
4595 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
4596 spa
= spa_add(pool
, NULL
, altroot
);
4597 spa_activate(spa
, spa_mode_global
);
4599 if (props
&& (error
= spa_prop_validate(spa
, props
))) {
4600 spa_deactivate(spa
);
4602 mutex_exit(&spa_namespace_lock
);
4606 has_features
= B_FALSE
;
4607 for (nvpair_t
*elem
= nvlist_next_nvpair(props
, NULL
);
4608 elem
!= NULL
; elem
= nvlist_next_nvpair(props
, elem
)) {
4609 if (zpool_prop_feature(nvpair_name(elem
)))
4610 has_features
= B_TRUE
;
4613 if (has_features
|| nvlist_lookup_uint64(props
,
4614 zpool_prop_to_name(ZPOOL_PROP_VERSION
), &version
) != 0) {
4615 version
= SPA_VERSION
;
4617 ASSERT(SPA_VERSION_IS_SUPPORTED(version
));
4619 spa
->spa_first_txg
= txg
;
4620 spa
->spa_uberblock
.ub_txg
= txg
- 1;
4621 spa
->spa_uberblock
.ub_version
= version
;
4622 spa
->spa_ubsync
= spa
->spa_uberblock
;
4623 spa
->spa_load_state
= SPA_LOAD_CREATE
;
4624 spa
->spa_removing_phys
.sr_state
= DSS_NONE
;
4625 spa
->spa_removing_phys
.sr_removing_vdev
= -1;
4626 spa
->spa_removing_phys
.sr_prev_indirect_vdev
= -1;
4629 * Create "The Godfather" zio to hold all async IOs
4631 spa
->spa_async_zio_root
= kmem_alloc(max_ncpus
* sizeof (void *),
4633 for (int i
= 0; i
< max_ncpus
; i
++) {
4634 spa
->spa_async_zio_root
[i
] = zio_root(spa
, NULL
, NULL
,
4635 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
|
4636 ZIO_FLAG_GODFATHER
);
4640 * Create the root vdev.
4642 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4644 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, VDEV_ALLOC_ADD
);
4646 ASSERT(error
!= 0 || rvd
!= NULL
);
4647 ASSERT(error
!= 0 || spa
->spa_root_vdev
== rvd
);
4649 if (error
== 0 && !zfs_allocatable_devs(nvroot
))
4650 error
= SET_ERROR(EINVAL
);
4653 (error
= vdev_create(rvd
, txg
, B_FALSE
)) == 0 &&
4654 (error
= spa_validate_aux(spa
, nvroot
, txg
,
4655 VDEV_ALLOC_ADD
)) == 0) {
4656 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
4657 vdev_metaslab_set_size(rvd
->vdev_child
[c
]);
4658 vdev_expand(rvd
->vdev_child
[c
], txg
);
4662 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4666 spa_deactivate(spa
);
4668 mutex_exit(&spa_namespace_lock
);
4673 * Get the list of spares, if specified.
4675 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
4676 &spares
, &nspares
) == 0) {
4677 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
, NV_UNIQUE_NAME
,
4679 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
4680 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
4681 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4682 spa_load_spares(spa
);
4683 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4684 spa
->spa_spares
.sav_sync
= B_TRUE
;
4688 * Get the list of level 2 cache devices, if specified.
4690 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
4691 &l2cache
, &nl2cache
) == 0) {
4692 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
4693 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4694 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
4695 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
4696 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4697 spa_load_l2cache(spa
);
4698 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4699 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4702 spa
->spa_is_initializing
= B_TRUE
;
4703 spa
->spa_dsl_pool
= dp
= dsl_pool_create(spa
, zplprops
, txg
);
4704 spa
->spa_meta_objset
= dp
->dp_meta_objset
;
4705 spa
->spa_is_initializing
= B_FALSE
;
4708 * Create DDTs (dedup tables).
4712 spa_update_dspace(spa
);
4714 tx
= dmu_tx_create_assigned(dp
, txg
);
4717 * Create the pool config object.
4719 spa
->spa_config_object
= dmu_object_alloc(spa
->spa_meta_objset
,
4720 DMU_OT_PACKED_NVLIST
, SPA_CONFIG_BLOCKSIZE
,
4721 DMU_OT_PACKED_NVLIST_SIZE
, sizeof (uint64_t), tx
);
4723 if (zap_add(spa
->spa_meta_objset
,
4724 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CONFIG
,
4725 sizeof (uint64_t), 1, &spa
->spa_config_object
, tx
) != 0) {
4726 cmn_err(CE_PANIC
, "failed to add pool config");
4729 if (spa_version(spa
) >= SPA_VERSION_FEATURES
)
4730 spa_feature_create_zap_objects(spa
, tx
);
4732 if (zap_add(spa
->spa_meta_objset
,
4733 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CREATION_VERSION
,
4734 sizeof (uint64_t), 1, &version
, tx
) != 0) {
4735 cmn_err(CE_PANIC
, "failed to add pool version");
4738 /* Newly created pools with the right version are always deflated. */
4739 if (version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
4740 spa
->spa_deflate
= TRUE
;
4741 if (zap_add(spa
->spa_meta_objset
,
4742 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
4743 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
) != 0) {
4744 cmn_err(CE_PANIC
, "failed to add deflate");
4749 * Create the deferred-free bpobj. Turn off compression
4750 * because sync-to-convergence takes longer if the blocksize
4753 obj
= bpobj_alloc(spa
->spa_meta_objset
, 1 << 14, tx
);
4754 dmu_object_set_compress(spa
->spa_meta_objset
, obj
,
4755 ZIO_COMPRESS_OFF
, tx
);
4756 if (zap_add(spa
->spa_meta_objset
,
4757 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_SYNC_BPOBJ
,
4758 sizeof (uint64_t), 1, &obj
, tx
) != 0) {
4759 cmn_err(CE_PANIC
, "failed to add bpobj");
4761 VERIFY3U(0, ==, bpobj_open(&spa
->spa_deferred_bpobj
,
4762 spa
->spa_meta_objset
, obj
));
4765 * Create the pool's history object.
4767 if (version
>= SPA_VERSION_ZPOOL_HISTORY
)
4768 spa_history_create_obj(spa
, tx
);
4771 * Generate some random noise for salted checksums to operate on.
4773 (void) random_get_pseudo_bytes(spa
->spa_cksum_salt
.zcs_bytes
,
4774 sizeof (spa
->spa_cksum_salt
.zcs_bytes
));
4777 * Set pool properties.
4779 spa
->spa_bootfs
= zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS
);
4780 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
4781 spa
->spa_failmode
= zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE
);
4782 spa
->spa_autoexpand
= zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND
);
4784 if (props
!= NULL
) {
4785 spa_configfile_set(spa
, props
, B_FALSE
);
4786 spa_sync_props(props
, tx
);
4791 spa
->spa_sync_on
= B_TRUE
;
4792 txg_sync_start(spa
->spa_dsl_pool
);
4795 * We explicitly wait for the first transaction to complete so that our
4796 * bean counters are appropriately updated.
4798 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
4800 spa_spawn_aux_threads(spa
);
4802 spa_write_cachefile(spa
, B_FALSE
, B_TRUE
);
4803 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_POOL_CREATE
);
4805 spa_history_log_version(spa
, "create");
4808 * Don't count references from objsets that are already closed
4809 * and are making their way through the eviction process.
4811 spa_evicting_os_wait(spa
);
4812 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
4813 spa
->spa_load_state
= SPA_LOAD_NONE
;
4815 mutex_exit(&spa_namespace_lock
);
4822 * Get the root pool information from the root disk, then import the root pool
4823 * during the system boot up time.
4825 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t
**);
4828 spa_generate_rootconf(char *devpath
, char *devid
, uint64_t *guid
)
4831 nvlist_t
*nvtop
, *nvroot
;
4834 if (vdev_disk_read_rootlabel(devpath
, devid
, &config
) != 0)
4838 * Add this top-level vdev to the child array.
4840 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
4842 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
4844 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_GUID
, guid
) == 0);
4847 * Put this pool's top-level vdevs into a root vdev.
4849 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4850 VERIFY(nvlist_add_string(nvroot
, ZPOOL_CONFIG_TYPE
,
4851 VDEV_TYPE_ROOT
) == 0);
4852 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_ID
, 0ULL) == 0);
4853 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_GUID
, pgid
) == 0);
4854 VERIFY(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
4858 * Replace the existing vdev_tree with the new root vdev in
4859 * this pool's configuration (remove the old, add the new).
4861 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, nvroot
) == 0);
4862 nvlist_free(nvroot
);
4867 * Walk the vdev tree and see if we can find a device with "better"
4868 * configuration. A configuration is "better" if the label on that
4869 * device has a more recent txg.
4872 spa_alt_rootvdev(vdev_t
*vd
, vdev_t
**avd
, uint64_t *txg
)
4874 for (int c
= 0; c
< vd
->vdev_children
; c
++)
4875 spa_alt_rootvdev(vd
->vdev_child
[c
], avd
, txg
);
4877 if (vd
->vdev_ops
->vdev_op_leaf
) {
4881 if (vdev_disk_read_rootlabel(vd
->vdev_physpath
, vd
->vdev_devid
,
4885 VERIFY(nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_TXG
,
4889 * Do we have a better boot device?
4891 if (label_txg
> *txg
) {
4900 * Import a root pool.
4902 * For x86. devpath_list will consist of devid and/or physpath name of
4903 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
4904 * The GRUB "findroot" command will return the vdev we should boot.
4906 * For Sparc, devpath_list consists the physpath name of the booting device
4907 * no matter the rootpool is a single device pool or a mirrored pool.
4909 * "/pci@1f,0/ide@d/disk@0,0:a"
4912 spa_import_rootpool(char *devpath
, char *devid
)
4915 vdev_t
*rvd
, *bvd
, *avd
= NULL
;
4916 nvlist_t
*config
, *nvtop
;
4922 * Read the label from the boot device and generate a configuration.
4924 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
4925 #if defined(_OBP) && defined(_KERNEL)
4926 if (config
== NULL
) {
4927 if (strstr(devpath
, "/iscsi/ssd") != NULL
) {
4929 get_iscsi_bootpath_phy(devpath
);
4930 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
4934 if (config
== NULL
) {
4935 cmn_err(CE_NOTE
, "Cannot read the pool label from '%s'",
4937 return (SET_ERROR(EIO
));
4940 VERIFY(nvlist_lookup_string(config
, ZPOOL_CONFIG_POOL_NAME
,
4942 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
, &txg
) == 0);
4944 mutex_enter(&spa_namespace_lock
);
4945 if ((spa
= spa_lookup(pname
)) != NULL
) {
4947 * Remove the existing root pool from the namespace so that we
4948 * can replace it with the correct config we just read in.
4953 spa
= spa_add(pname
, config
, NULL
);
4954 spa
->spa_is_root
= B_TRUE
;
4955 spa
->spa_import_flags
= ZFS_IMPORT_VERBATIM
;
4956 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VERSION
,
4957 &spa
->spa_ubsync
.ub_version
) != 0)
4958 spa
->spa_ubsync
.ub_version
= SPA_VERSION_INITIAL
;
4961 * Build up a vdev tree based on the boot device's label config.
4963 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
4965 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4966 error
= spa_config_parse(spa
, &rvd
, nvtop
, NULL
, 0,
4967 VDEV_ALLOC_ROOTPOOL
);
4968 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4970 mutex_exit(&spa_namespace_lock
);
4971 nvlist_free(config
);
4972 cmn_err(CE_NOTE
, "Can not parse the config for pool '%s'",
4978 * Get the boot vdev.
4980 if ((bvd
= vdev_lookup_by_guid(rvd
, guid
)) == NULL
) {
4981 cmn_err(CE_NOTE
, "Can not find the boot vdev for guid %llu",
4982 (u_longlong_t
)guid
);
4983 error
= SET_ERROR(ENOENT
);
4988 * Determine if there is a better boot device.
4991 spa_alt_rootvdev(rvd
, &avd
, &txg
);
4993 cmn_err(CE_NOTE
, "The boot device is 'degraded'. Please "
4994 "try booting from '%s'", avd
->vdev_path
);
4995 error
= SET_ERROR(EINVAL
);
5000 * If the boot device is part of a spare vdev then ensure that
5001 * we're booting off the active spare.
5003 if (bvd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
5004 !bvd
->vdev_isspare
) {
5005 cmn_err(CE_NOTE
, "The boot device is currently spared. Please "
5006 "try booting from '%s'",
5008 vdev_child
[bvd
->vdev_parent
->vdev_children
- 1]->vdev_path
);
5009 error
= SET_ERROR(EINVAL
);
5015 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5017 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5018 mutex_exit(&spa_namespace_lock
);
5020 nvlist_free(config
);
5027 * Import a non-root pool into the system.
5030 spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
, uint64_t flags
)
5033 char *altroot
= NULL
;
5034 spa_load_state_t state
= SPA_LOAD_IMPORT
;
5035 zpool_load_policy_t policy
;
5036 uint64_t mode
= spa_mode_global
;
5037 uint64_t readonly
= B_FALSE
;
5040 nvlist_t
**spares
, **l2cache
;
5041 uint_t nspares
, nl2cache
;
5044 * If a pool with this name exists, return failure.
5046 mutex_enter(&spa_namespace_lock
);
5047 if (spa_lookup(pool
) != NULL
) {
5048 mutex_exit(&spa_namespace_lock
);
5049 return (SET_ERROR(EEXIST
));
5053 * Create and initialize the spa structure.
5055 (void) nvlist_lookup_string(props
,
5056 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
5057 (void) nvlist_lookup_uint64(props
,
5058 zpool_prop_to_name(ZPOOL_PROP_READONLY
), &readonly
);
5061 spa
= spa_add(pool
, config
, altroot
);
5062 spa
->spa_import_flags
= flags
;
5065 * Verbatim import - Take a pool and insert it into the namespace
5066 * as if it had been loaded at boot.
5068 if (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) {
5070 spa_configfile_set(spa
, props
, B_FALSE
);
5072 spa_write_cachefile(spa
, B_FALSE
, B_TRUE
);
5073 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_POOL_IMPORT
);
5074 zfs_dbgmsg("spa_import: verbatim import of %s", pool
);
5075 mutex_exit(&spa_namespace_lock
);
5079 spa_activate(spa
, mode
);
5082 * Don't start async tasks until we know everything is healthy.
5084 spa_async_suspend(spa
);
5086 zpool_get_load_policy(config
, &policy
);
5087 if (policy
.zlp_rewind
& ZPOOL_DO_REWIND
)
5088 state
= SPA_LOAD_RECOVER
;
5090 spa
->spa_config_source
= SPA_CONFIG_SRC_TRYIMPORT
;
5092 if (state
!= SPA_LOAD_RECOVER
) {
5093 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
5094 zfs_dbgmsg("spa_import: importing %s", pool
);
5096 zfs_dbgmsg("spa_import: importing %s, max_txg=%lld "
5097 "(RECOVERY MODE)", pool
, (longlong_t
)policy
.zlp_txg
);
5099 error
= spa_load_best(spa
, state
, policy
.zlp_txg
, policy
.zlp_rewind
);
5102 * Propagate anything learned while loading the pool and pass it
5103 * back to caller (i.e. rewind info, missing devices, etc).
5105 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
5106 spa
->spa_load_info
) == 0);
5108 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5110 * Toss any existing sparelist, as it doesn't have any validity
5111 * anymore, and conflicts with spa_has_spare().
5113 if (spa
->spa_spares
.sav_config
) {
5114 nvlist_free(spa
->spa_spares
.sav_config
);
5115 spa
->spa_spares
.sav_config
= NULL
;
5116 spa_load_spares(spa
);
5118 if (spa
->spa_l2cache
.sav_config
) {
5119 nvlist_free(spa
->spa_l2cache
.sav_config
);
5120 spa
->spa_l2cache
.sav_config
= NULL
;
5121 spa_load_l2cache(spa
);
5124 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
5127 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
5130 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
5131 VDEV_ALLOC_L2CACHE
);
5132 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5135 spa_configfile_set(spa
, props
, B_FALSE
);
5137 if (error
!= 0 || (props
&& spa_writeable(spa
) &&
5138 (error
= spa_prop_set(spa
, props
)))) {
5140 spa_deactivate(spa
);
5142 mutex_exit(&spa_namespace_lock
);
5146 spa_async_resume(spa
);
5149 * Override any spares and level 2 cache devices as specified by
5150 * the user, as these may have correct device names/devids, etc.
5152 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
5153 &spares
, &nspares
) == 0) {
5154 if (spa
->spa_spares
.sav_config
)
5155 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
,
5156 ZPOOL_CONFIG_SPARES
, DATA_TYPE_NVLIST_ARRAY
) == 0);
5158 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
,
5159 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5160 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
5161 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
5162 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5163 spa_load_spares(spa
);
5164 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5165 spa
->spa_spares
.sav_sync
= B_TRUE
;
5167 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
5168 &l2cache
, &nl2cache
) == 0) {
5169 if (spa
->spa_l2cache
.sav_config
)
5170 VERIFY(nvlist_remove(spa
->spa_l2cache
.sav_config
,
5171 ZPOOL_CONFIG_L2CACHE
, DATA_TYPE_NVLIST_ARRAY
) == 0);
5173 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
5174 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5175 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
5176 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
5177 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5178 spa_load_l2cache(spa
);
5179 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5180 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
5184 * Check for any removed devices.
5186 if (spa
->spa_autoreplace
) {
5187 spa_aux_check_removed(&spa
->spa_spares
);
5188 spa_aux_check_removed(&spa
->spa_l2cache
);
5191 if (spa_writeable(spa
)) {
5193 * Update the config cache to include the newly-imported pool.
5195 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
5199 * It's possible that the pool was expanded while it was exported.
5200 * We kick off an async task to handle this for us.
5202 spa_async_request(spa
, SPA_ASYNC_AUTOEXPAND
);
5204 spa_history_log_version(spa
, "import");
5206 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_POOL_IMPORT
);
5208 mutex_exit(&spa_namespace_lock
);
5214 spa_tryimport(nvlist_t
*tryconfig
)
5216 nvlist_t
*config
= NULL
;
5217 char *poolname
, *cachefile
;
5221 zpool_load_policy_t policy
;
5223 if (nvlist_lookup_string(tryconfig
, ZPOOL_CONFIG_POOL_NAME
, &poolname
))
5226 if (nvlist_lookup_uint64(tryconfig
, ZPOOL_CONFIG_POOL_STATE
, &state
))
5230 * Create and initialize the spa structure.
5232 mutex_enter(&spa_namespace_lock
);
5233 spa
= spa_add(TRYIMPORT_NAME
, tryconfig
, NULL
);
5234 spa_activate(spa
, FREAD
);
5237 * Rewind pool if a max txg was provided.
5239 zpool_get_load_policy(spa
->spa_config
, &policy
);
5240 if (policy
.zlp_txg
!= UINT64_MAX
) {
5241 spa
->spa_load_max_txg
= policy
.zlp_txg
;
5242 spa
->spa_extreme_rewind
= B_TRUE
;
5243 zfs_dbgmsg("spa_tryimport: importing %s, max_txg=%lld",
5244 poolname
, (longlong_t
)policy
.zlp_txg
);
5246 zfs_dbgmsg("spa_tryimport: importing %s", poolname
);
5249 if (nvlist_lookup_string(tryconfig
, ZPOOL_CONFIG_CACHEFILE
, &cachefile
)
5251 zfs_dbgmsg("spa_tryimport: using cachefile '%s'", cachefile
);
5252 spa
->spa_config_source
= SPA_CONFIG_SRC_CACHEFILE
;
5254 spa
->spa_config_source
= SPA_CONFIG_SRC_SCAN
;
5257 error
= spa_load(spa
, SPA_LOAD_TRYIMPORT
, SPA_IMPORT_EXISTING
);
5260 * If 'tryconfig' was at least parsable, return the current config.
5262 if (spa
->spa_root_vdev
!= NULL
) {
5263 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
5264 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
,
5266 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
5268 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_TIMESTAMP
,
5269 spa
->spa_uberblock
.ub_timestamp
) == 0);
5270 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
5271 spa
->spa_load_info
) == 0);
5274 * If the bootfs property exists on this pool then we
5275 * copy it out so that external consumers can tell which
5276 * pools are bootable.
5278 if ((!error
|| error
== EEXIST
) && spa
->spa_bootfs
) {
5279 char *tmpname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
5282 * We have to play games with the name since the
5283 * pool was opened as TRYIMPORT_NAME.
5285 if (dsl_dsobj_to_dsname(spa_name(spa
),
5286 spa
->spa_bootfs
, tmpname
) == 0) {
5288 char *dsname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
5290 cp
= strchr(tmpname
, '/');
5292 (void) strlcpy(dsname
, tmpname
,
5295 (void) snprintf(dsname
, MAXPATHLEN
,
5296 "%s/%s", poolname
, ++cp
);
5298 VERIFY(nvlist_add_string(config
,
5299 ZPOOL_CONFIG_BOOTFS
, dsname
) == 0);
5300 kmem_free(dsname
, MAXPATHLEN
);
5302 kmem_free(tmpname
, MAXPATHLEN
);
5306 * Add the list of hot spares and level 2 cache devices.
5308 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5309 spa_add_spares(spa
, config
);
5310 spa_add_l2cache(spa
, config
);
5311 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5315 spa_deactivate(spa
);
5317 mutex_exit(&spa_namespace_lock
);
5323 * Pool export/destroy
5325 * The act of destroying or exporting a pool is very simple. We make sure there
5326 * is no more pending I/O and any references to the pool are gone. Then, we
5327 * update the pool state and sync all the labels to disk, removing the
5328 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
5329 * we don't sync the labels or remove the configuration cache.
5332 spa_export_common(char *pool
, int new_state
, nvlist_t
**oldconfig
,
5333 boolean_t force
, boolean_t hardforce
)
5340 if (!(spa_mode_global
& FWRITE
))
5341 return (SET_ERROR(EROFS
));
5343 mutex_enter(&spa_namespace_lock
);
5344 if ((spa
= spa_lookup(pool
)) == NULL
) {
5345 mutex_exit(&spa_namespace_lock
);
5346 return (SET_ERROR(ENOENT
));
5350 * Put a hold on the pool, drop the namespace lock, stop async tasks,
5351 * reacquire the namespace lock, and see if we can export.
5353 spa_open_ref(spa
, FTAG
);
5354 mutex_exit(&spa_namespace_lock
);
5355 spa_async_suspend(spa
);
5356 mutex_enter(&spa_namespace_lock
);
5357 spa_close(spa
, FTAG
);
5360 * The pool will be in core if it's openable,
5361 * in which case we can modify its state.
5363 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
&& spa
->spa_sync_on
) {
5366 * Objsets may be open only because they're dirty, so we
5367 * have to force it to sync before checking spa_refcnt.
5369 txg_wait_synced(spa
->spa_dsl_pool
, 0);
5370 spa_evicting_os_wait(spa
);
5373 * A pool cannot be exported or destroyed if there are active
5374 * references. If we are resetting a pool, allow references by
5375 * fault injection handlers.
5377 if (!spa_refcount_zero(spa
) ||
5378 (spa
->spa_inject_ref
!= 0 &&
5379 new_state
!= POOL_STATE_UNINITIALIZED
)) {
5380 spa_async_resume(spa
);
5381 mutex_exit(&spa_namespace_lock
);
5382 return (SET_ERROR(EBUSY
));
5386 * A pool cannot be exported if it has an active shared spare.
5387 * This is to prevent other pools stealing the active spare
5388 * from an exported pool. At user's own will, such pool can
5389 * be forcedly exported.
5391 if (!force
&& new_state
== POOL_STATE_EXPORTED
&&
5392 spa_has_active_shared_spare(spa
)) {
5393 spa_async_resume(spa
);
5394 mutex_exit(&spa_namespace_lock
);
5395 return (SET_ERROR(EXDEV
));
5399 * We're about to export or destroy this pool. Make sure
5400 * we stop all initializtion activity here before we
5401 * set the spa_final_txg. This will ensure that all
5402 * dirty data resulting from the initialization is
5403 * committed to disk before we unload the pool.
5405 if (spa
->spa_root_vdev
!= NULL
) {
5406 vdev_initialize_stop_all(spa
->spa_root_vdev
,
5407 VDEV_INITIALIZE_ACTIVE
);
5411 * We want this to be reflected on every label,
5412 * so mark them all dirty. spa_unload() will do the
5413 * final sync that pushes these changes out.
5415 if (new_state
!= POOL_STATE_UNINITIALIZED
&& !hardforce
) {
5416 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5417 spa
->spa_state
= new_state
;
5418 spa
->spa_final_txg
= spa_last_synced_txg(spa
) +
5420 vdev_config_dirty(spa
->spa_root_vdev
);
5421 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5425 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_POOL_DESTROY
);
5427 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
5429 spa_deactivate(spa
);
5432 if (oldconfig
&& spa
->spa_config
)
5433 VERIFY(nvlist_dup(spa
->spa_config
, oldconfig
, 0) == 0);
5435 if (new_state
!= POOL_STATE_UNINITIALIZED
) {
5437 spa_write_cachefile(spa
, B_TRUE
, B_TRUE
);
5440 mutex_exit(&spa_namespace_lock
);
5446 * Destroy a storage pool.
5449 spa_destroy(char *pool
)
5451 return (spa_export_common(pool
, POOL_STATE_DESTROYED
, NULL
,
5456 * Export a storage pool.
5459 spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
5460 boolean_t hardforce
)
5462 return (spa_export_common(pool
, POOL_STATE_EXPORTED
, oldconfig
,
5467 * Similar to spa_export(), this unloads the spa_t without actually removing it
5468 * from the namespace in any way.
5471 spa_reset(char *pool
)
5473 return (spa_export_common(pool
, POOL_STATE_UNINITIALIZED
, NULL
,
5478 * ==========================================================================
5479 * Device manipulation
5480 * ==========================================================================
5484 * Add a device to a storage pool.
5487 spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
)
5491 vdev_t
*rvd
= spa
->spa_root_vdev
;
5493 nvlist_t
**spares
, **l2cache
;
5494 uint_t nspares
, nl2cache
;
5496 ASSERT(spa_writeable(spa
));
5498 txg
= spa_vdev_enter(spa
);
5500 if ((error
= spa_config_parse(spa
, &vd
, nvroot
, NULL
, 0,
5501 VDEV_ALLOC_ADD
)) != 0)
5502 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5504 spa
->spa_pending_vdev
= vd
; /* spa_vdev_exit() will clear this */
5506 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
, &spares
,
5510 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
, &l2cache
,
5514 if (vd
->vdev_children
== 0 && nspares
== 0 && nl2cache
== 0)
5515 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
5517 if (vd
->vdev_children
!= 0 &&
5518 (error
= vdev_create(vd
, txg
, B_FALSE
)) != 0)
5519 return (spa_vdev_exit(spa
, vd
, txg
, error
));
5522 * We must validate the spares and l2cache devices after checking the
5523 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
5525 if ((error
= spa_validate_aux(spa
, nvroot
, txg
, VDEV_ALLOC_ADD
)) != 0)
5526 return (spa_vdev_exit(spa
, vd
, txg
, error
));
5529 * If we are in the middle of a device removal, we can only add
5530 * devices which match the existing devices in the pool.
5531 * If we are in the middle of a removal, or have some indirect
5532 * vdevs, we can not add raidz toplevels.
5534 if (spa
->spa_vdev_removal
!= NULL
||
5535 spa
->spa_removing_phys
.sr_prev_indirect_vdev
!= -1) {
5536 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
5537 tvd
= vd
->vdev_child
[c
];
5538 if (spa
->spa_vdev_removal
!= NULL
&&
5539 tvd
->vdev_ashift
!= spa
->spa_max_ashift
) {
5540 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
5542 /* Fail if top level vdev is raidz */
5543 if (tvd
->vdev_ops
== &vdev_raidz_ops
) {
5544 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
5547 * Need the top level mirror to be
5548 * a mirror of leaf vdevs only
5550 if (tvd
->vdev_ops
== &vdev_mirror_ops
) {
5551 for (uint64_t cid
= 0;
5552 cid
< tvd
->vdev_children
; cid
++) {
5553 vdev_t
*cvd
= tvd
->vdev_child
[cid
];
5554 if (!cvd
->vdev_ops
->vdev_op_leaf
) {
5555 return (spa_vdev_exit(spa
, vd
,
5563 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
5566 * Set the vdev id to the first hole, if one exists.
5568 for (id
= 0; id
< rvd
->vdev_children
; id
++) {
5569 if (rvd
->vdev_child
[id
]->vdev_ishole
) {
5570 vdev_free(rvd
->vdev_child
[id
]);
5574 tvd
= vd
->vdev_child
[c
];
5575 vdev_remove_child(vd
, tvd
);
5577 vdev_add_child(rvd
, tvd
);
5578 vdev_config_dirty(tvd
);
5582 spa_set_aux_vdevs(&spa
->spa_spares
, spares
, nspares
,
5583 ZPOOL_CONFIG_SPARES
);
5584 spa_load_spares(spa
);
5585 spa
->spa_spares
.sav_sync
= B_TRUE
;
5588 if (nl2cache
!= 0) {
5589 spa_set_aux_vdevs(&spa
->spa_l2cache
, l2cache
, nl2cache
,
5590 ZPOOL_CONFIG_L2CACHE
);
5591 spa_load_l2cache(spa
);
5592 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
5596 * We have to be careful when adding new vdevs to an existing pool.
5597 * If other threads start allocating from these vdevs before we
5598 * sync the config cache, and we lose power, then upon reboot we may
5599 * fail to open the pool because there are DVAs that the config cache
5600 * can't translate. Therefore, we first add the vdevs without
5601 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
5602 * and then let spa_config_update() initialize the new metaslabs.
5604 * spa_load() checks for added-but-not-initialized vdevs, so that
5605 * if we lose power at any point in this sequence, the remaining
5606 * steps will be completed the next time we load the pool.
5608 (void) spa_vdev_exit(spa
, vd
, txg
, 0);
5610 mutex_enter(&spa_namespace_lock
);
5611 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
5612 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_VDEV_ADD
);
5613 mutex_exit(&spa_namespace_lock
);
5619 * Attach a device to a mirror. The arguments are the path to any device
5620 * in the mirror, and the nvroot for the new device. If the path specifies
5621 * a device that is not mirrored, we automatically insert the mirror vdev.
5623 * If 'replacing' is specified, the new device is intended to replace the
5624 * existing device; in this case the two devices are made into their own
5625 * mirror using the 'replacing' vdev, which is functionally identical to
5626 * the mirror vdev (it actually reuses all the same ops) but has a few
5627 * extra rules: you can't attach to it after it's been created, and upon
5628 * completion of resilvering, the first disk (the one being replaced)
5629 * is automatically detached.
5632 spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
, int replacing
)
5634 uint64_t txg
, dtl_max_txg
;
5635 vdev_t
*rvd
= spa
->spa_root_vdev
;
5636 vdev_t
*oldvd
, *newvd
, *newrootvd
, *pvd
, *tvd
;
5638 char *oldvdpath
, *newvdpath
;
5642 ASSERT(spa_writeable(spa
));
5644 txg
= spa_vdev_enter(spa
);
5646 oldvd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
5648 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
5649 if (spa_feature_is_active(spa
, SPA_FEATURE_POOL_CHECKPOINT
)) {
5650 error
= (spa_has_checkpoint(spa
)) ?
5651 ZFS_ERR_CHECKPOINT_EXISTS
: ZFS_ERR_DISCARDING_CHECKPOINT
;
5652 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5655 if (spa
->spa_vdev_removal
!= NULL
)
5656 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
5659 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
5661 if (!oldvd
->vdev_ops
->vdev_op_leaf
)
5662 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
5664 pvd
= oldvd
->vdev_parent
;
5666 if ((error
= spa_config_parse(spa
, &newrootvd
, nvroot
, NULL
, 0,
5667 VDEV_ALLOC_ATTACH
)) != 0)
5668 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
5670 if (newrootvd
->vdev_children
!= 1)
5671 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
5673 newvd
= newrootvd
->vdev_child
[0];
5675 if (!newvd
->vdev_ops
->vdev_op_leaf
)
5676 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
5678 if ((error
= vdev_create(newrootvd
, txg
, replacing
)) != 0)
5679 return (spa_vdev_exit(spa
, newrootvd
, txg
, error
));
5682 * Spares can't replace logs
5684 if (oldvd
->vdev_top
->vdev_islog
&& newvd
->vdev_isspare
)
5685 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
5689 * For attach, the only allowable parent is a mirror or the root
5692 if (pvd
->vdev_ops
!= &vdev_mirror_ops
&&
5693 pvd
->vdev_ops
!= &vdev_root_ops
)
5694 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
5696 pvops
= &vdev_mirror_ops
;
5699 * Active hot spares can only be replaced by inactive hot
5702 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
5703 oldvd
->vdev_isspare
&&
5704 !spa_has_spare(spa
, newvd
->vdev_guid
))
5705 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
5708 * If the source is a hot spare, and the parent isn't already a
5709 * spare, then we want to create a new hot spare. Otherwise, we
5710 * want to create a replacing vdev. The user is not allowed to
5711 * attach to a spared vdev child unless the 'isspare' state is
5712 * the same (spare replaces spare, non-spare replaces
5715 if (pvd
->vdev_ops
== &vdev_replacing_ops
&&
5716 spa_version(spa
) < SPA_VERSION_MULTI_REPLACE
) {
5717 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
5718 } else if (pvd
->vdev_ops
== &vdev_spare_ops
&&
5719 newvd
->vdev_isspare
!= oldvd
->vdev_isspare
) {
5720 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
5723 if (newvd
->vdev_isspare
)
5724 pvops
= &vdev_spare_ops
;
5726 pvops
= &vdev_replacing_ops
;
5730 * Make sure the new device is big enough.
5732 if (newvd
->vdev_asize
< vdev_get_min_asize(oldvd
))
5733 return (spa_vdev_exit(spa
, newrootvd
, txg
, EOVERFLOW
));
5736 * The new device cannot have a higher alignment requirement
5737 * than the top-level vdev.
5739 if (newvd
->vdev_ashift
> oldvd
->vdev_top
->vdev_ashift
)
5740 return (spa_vdev_exit(spa
, newrootvd
, txg
, EDOM
));
5743 * If this is an in-place replacement, update oldvd's path and devid
5744 * to make it distinguishable from newvd, and unopenable from now on.
5746 if (strcmp(oldvd
->vdev_path
, newvd
->vdev_path
) == 0) {
5747 spa_strfree(oldvd
->vdev_path
);
5748 oldvd
->vdev_path
= kmem_alloc(strlen(newvd
->vdev_path
) + 5,
5750 (void) sprintf(oldvd
->vdev_path
, "%s/%s",
5751 newvd
->vdev_path
, "old");
5752 if (oldvd
->vdev_devid
!= NULL
) {
5753 spa_strfree(oldvd
->vdev_devid
);
5754 oldvd
->vdev_devid
= NULL
;
5758 /* mark the device being resilvered */
5759 newvd
->vdev_resilver_txg
= txg
;
5762 * If the parent is not a mirror, or if we're replacing, insert the new
5763 * mirror/replacing/spare vdev above oldvd.
5765 if (pvd
->vdev_ops
!= pvops
)
5766 pvd
= vdev_add_parent(oldvd
, pvops
);
5768 ASSERT(pvd
->vdev_top
->vdev_parent
== rvd
);
5769 ASSERT(pvd
->vdev_ops
== pvops
);
5770 ASSERT(oldvd
->vdev_parent
== pvd
);
5773 * Extract the new device from its root and add it to pvd.
5775 vdev_remove_child(newrootvd
, newvd
);
5776 newvd
->vdev_id
= pvd
->vdev_children
;
5777 newvd
->vdev_crtxg
= oldvd
->vdev_crtxg
;
5778 vdev_add_child(pvd
, newvd
);
5780 tvd
= newvd
->vdev_top
;
5781 ASSERT(pvd
->vdev_top
== tvd
);
5782 ASSERT(tvd
->vdev_parent
== rvd
);
5784 vdev_config_dirty(tvd
);
5787 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
5788 * for any dmu_sync-ed blocks. It will propagate upward when
5789 * spa_vdev_exit() calls vdev_dtl_reassess().
5791 dtl_max_txg
= txg
+ TXG_CONCURRENT_STATES
;
5793 vdev_dtl_dirty(newvd
, DTL_MISSING
, TXG_INITIAL
,
5794 dtl_max_txg
- TXG_INITIAL
);
5796 if (newvd
->vdev_isspare
) {
5797 spa_spare_activate(newvd
);
5798 spa_event_notify(spa
, newvd
, NULL
, ESC_ZFS_VDEV_SPARE
);
5801 oldvdpath
= spa_strdup(oldvd
->vdev_path
);
5802 newvdpath
= spa_strdup(newvd
->vdev_path
);
5803 newvd_isspare
= newvd
->vdev_isspare
;
5806 * Mark newvd's DTL dirty in this txg.
5808 vdev_dirty(tvd
, VDD_DTL
, newvd
, txg
);
5811 * Schedule the resilver to restart in the future. We do this to
5812 * ensure that dmu_sync-ed blocks have been stitched into the
5813 * respective datasets.
5815 dsl_resilver_restart(spa
->spa_dsl_pool
, dtl_max_txg
);
5817 if (spa
->spa_bootfs
)
5818 spa_event_notify(spa
, newvd
, NULL
, ESC_ZFS_BOOTFS_VDEV_ATTACH
);
5820 spa_event_notify(spa
, newvd
, NULL
, ESC_ZFS_VDEV_ATTACH
);
5825 (void) spa_vdev_exit(spa
, newrootvd
, dtl_max_txg
, 0);
5827 spa_history_log_internal(spa
, "vdev attach", NULL
,
5828 "%s vdev=%s %s vdev=%s",
5829 replacing
&& newvd_isspare
? "spare in" :
5830 replacing
? "replace" : "attach", newvdpath
,
5831 replacing
? "for" : "to", oldvdpath
);
5833 spa_strfree(oldvdpath
);
5834 spa_strfree(newvdpath
);
5840 * Detach a device from a mirror or replacing vdev.
5842 * If 'replace_done' is specified, only detach if the parent
5843 * is a replacing vdev.
5846 spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
, int replace_done
)
5850 vdev_t
*rvd
= spa
->spa_root_vdev
;
5851 vdev_t
*vd
, *pvd
, *cvd
, *tvd
;
5852 boolean_t unspare
= B_FALSE
;
5853 uint64_t unspare_guid
= 0;
5856 ASSERT(spa_writeable(spa
));
5858 txg
= spa_vdev_enter(spa
);
5860 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
5863 * Besides being called directly from the userland through the
5864 * ioctl interface, spa_vdev_detach() can be potentially called
5865 * at the end of spa_vdev_resilver_done().
5867 * In the regular case, when we have a checkpoint this shouldn't
5868 * happen as we never empty the DTLs of a vdev during the scrub
5869 * [see comment in dsl_scan_done()]. Thus spa_vdev_resilvering_done()
5870 * should never get here when we have a checkpoint.
5872 * That said, even in a case when we checkpoint the pool exactly
5873 * as spa_vdev_resilver_done() calls this function everything
5874 * should be fine as the resilver will return right away.
5876 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
5877 if (spa_feature_is_active(spa
, SPA_FEATURE_POOL_CHECKPOINT
)) {
5878 error
= (spa_has_checkpoint(spa
)) ?
5879 ZFS_ERR_CHECKPOINT_EXISTS
: ZFS_ERR_DISCARDING_CHECKPOINT
;
5880 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5884 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
5886 if (!vd
->vdev_ops
->vdev_op_leaf
)
5887 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
5889 pvd
= vd
->vdev_parent
;
5892 * If the parent/child relationship is not as expected, don't do it.
5893 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
5894 * vdev that's replacing B with C. The user's intent in replacing
5895 * is to go from M(A,B) to M(A,C). If the user decides to cancel
5896 * the replace by detaching C, the expected behavior is to end up
5897 * M(A,B). But suppose that right after deciding to detach C,
5898 * the replacement of B completes. We would have M(A,C), and then
5899 * ask to detach C, which would leave us with just A -- not what
5900 * the user wanted. To prevent this, we make sure that the
5901 * parent/child relationship hasn't changed -- in this example,
5902 * that C's parent is still the replacing vdev R.
5904 if (pvd
->vdev_guid
!= pguid
&& pguid
!= 0)
5905 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
5908 * Only 'replacing' or 'spare' vdevs can be replaced.
5910 if (replace_done
&& pvd
->vdev_ops
!= &vdev_replacing_ops
&&
5911 pvd
->vdev_ops
!= &vdev_spare_ops
)
5912 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
5914 ASSERT(pvd
->vdev_ops
!= &vdev_spare_ops
||
5915 spa_version(spa
) >= SPA_VERSION_SPARES
);
5918 * Only mirror, replacing, and spare vdevs support detach.
5920 if (pvd
->vdev_ops
!= &vdev_replacing_ops
&&
5921 pvd
->vdev_ops
!= &vdev_mirror_ops
&&
5922 pvd
->vdev_ops
!= &vdev_spare_ops
)
5923 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
5926 * If this device has the only valid copy of some data,
5927 * we cannot safely detach it.
5929 if (vdev_dtl_required(vd
))
5930 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
5932 ASSERT(pvd
->vdev_children
>= 2);
5935 * If we are detaching the second disk from a replacing vdev, then
5936 * check to see if we changed the original vdev's path to have "/old"
5937 * at the end in spa_vdev_attach(). If so, undo that change now.
5939 if (pvd
->vdev_ops
== &vdev_replacing_ops
&& vd
->vdev_id
> 0 &&
5940 vd
->vdev_path
!= NULL
) {
5941 size_t len
= strlen(vd
->vdev_path
);
5943 for (int c
= 0; c
< pvd
->vdev_children
; c
++) {
5944 cvd
= pvd
->vdev_child
[c
];
5946 if (cvd
== vd
|| cvd
->vdev_path
== NULL
)
5949 if (strncmp(cvd
->vdev_path
, vd
->vdev_path
, len
) == 0 &&
5950 strcmp(cvd
->vdev_path
+ len
, "/old") == 0) {
5951 spa_strfree(cvd
->vdev_path
);
5952 cvd
->vdev_path
= spa_strdup(vd
->vdev_path
);
5959 * If we are detaching the original disk from a spare, then it implies
5960 * that the spare should become a real disk, and be removed from the
5961 * active spare list for the pool.
5963 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
5965 pvd
->vdev_child
[pvd
->vdev_children
- 1]->vdev_isspare
)
5969 * Erase the disk labels so the disk can be used for other things.
5970 * This must be done after all other error cases are handled,
5971 * but before we disembowel vd (so we can still do I/O to it).
5972 * But if we can't do it, don't treat the error as fatal --
5973 * it may be that the unwritability of the disk is the reason
5974 * it's being detached!
5976 error
= vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
5979 * Remove vd from its parent and compact the parent's children.
5981 vdev_remove_child(pvd
, vd
);
5982 vdev_compact_children(pvd
);
5985 * Remember one of the remaining children so we can get tvd below.
5987 cvd
= pvd
->vdev_child
[pvd
->vdev_children
- 1];
5990 * If we need to remove the remaining child from the list of hot spares,
5991 * do it now, marking the vdev as no longer a spare in the process.
5992 * We must do this before vdev_remove_parent(), because that can
5993 * change the GUID if it creates a new toplevel GUID. For a similar
5994 * reason, we must remove the spare now, in the same txg as the detach;
5995 * otherwise someone could attach a new sibling, change the GUID, and
5996 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
5999 ASSERT(cvd
->vdev_isspare
);
6000 spa_spare_remove(cvd
);
6001 unspare_guid
= cvd
->vdev_guid
;
6002 (void) spa_vdev_remove(spa
, unspare_guid
, B_TRUE
);
6003 cvd
->vdev_unspare
= B_TRUE
;
6007 * If the parent mirror/replacing vdev only has one child,
6008 * the parent is no longer needed. Remove it from the tree.
6010 if (pvd
->vdev_children
== 1) {
6011 if (pvd
->vdev_ops
== &vdev_spare_ops
)
6012 cvd
->vdev_unspare
= B_FALSE
;
6013 vdev_remove_parent(cvd
);
6018 * We don't set tvd until now because the parent we just removed
6019 * may have been the previous top-level vdev.
6021 tvd
= cvd
->vdev_top
;
6022 ASSERT(tvd
->vdev_parent
== rvd
);
6025 * Reevaluate the parent vdev state.
6027 vdev_propagate_state(cvd
);
6030 * If the 'autoexpand' property is set on the pool then automatically
6031 * try to expand the size of the pool. For example if the device we
6032 * just detached was smaller than the others, it may be possible to
6033 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
6034 * first so that we can obtain the updated sizes of the leaf vdevs.
6036 if (spa
->spa_autoexpand
) {
6038 vdev_expand(tvd
, txg
);
6041 vdev_config_dirty(tvd
);
6044 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
6045 * vd->vdev_detached is set and free vd's DTL object in syncing context.
6046 * But first make sure we're not on any *other* txg's DTL list, to
6047 * prevent vd from being accessed after it's freed.
6049 vdpath
= spa_strdup(vd
->vdev_path
);
6050 for (int t
= 0; t
< TXG_SIZE
; t
++)
6051 (void) txg_list_remove_this(&tvd
->vdev_dtl_list
, vd
, t
);
6052 vd
->vdev_detached
= B_TRUE
;
6053 vdev_dirty(tvd
, VDD_DTL
, vd
, txg
);
6055 spa_event_notify(spa
, vd
, NULL
, ESC_ZFS_VDEV_REMOVE
);
6057 /* hang on to the spa before we release the lock */
6058 spa_open_ref(spa
, FTAG
);
6060 error
= spa_vdev_exit(spa
, vd
, txg
, 0);
6062 spa_history_log_internal(spa
, "detach", NULL
,
6064 spa_strfree(vdpath
);
6067 * If this was the removal of the original device in a hot spare vdev,
6068 * then we want to go through and remove the device from the hot spare
6069 * list of every other pool.
6072 spa_t
*altspa
= NULL
;
6074 mutex_enter(&spa_namespace_lock
);
6075 while ((altspa
= spa_next(altspa
)) != NULL
) {
6076 if (altspa
->spa_state
!= POOL_STATE_ACTIVE
||
6080 spa_open_ref(altspa
, FTAG
);
6081 mutex_exit(&spa_namespace_lock
);
6082 (void) spa_vdev_remove(altspa
, unspare_guid
, B_TRUE
);
6083 mutex_enter(&spa_namespace_lock
);
6084 spa_close(altspa
, FTAG
);
6086 mutex_exit(&spa_namespace_lock
);
6088 /* search the rest of the vdevs for spares to remove */
6089 spa_vdev_resilver_done(spa
);
6092 /* all done with the spa; OK to release */
6093 mutex_enter(&spa_namespace_lock
);
6094 spa_close(spa
, FTAG
);
6095 mutex_exit(&spa_namespace_lock
);
6101 spa_vdev_initialize(spa_t
*spa
, uint64_t guid
, uint64_t cmd_type
)
6104 * We hold the namespace lock through the whole function
6105 * to prevent any changes to the pool while we're starting or
6106 * stopping initialization. The config and state locks are held so that
6107 * we can properly assess the vdev state before we commit to
6108 * the initializing operation.
6110 mutex_enter(&spa_namespace_lock
);
6111 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_READER
);
6113 /* Look up vdev and ensure it's a leaf. */
6114 vdev_t
*vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
6115 if (vd
== NULL
|| vd
->vdev_detached
) {
6116 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
6117 mutex_exit(&spa_namespace_lock
);
6118 return (SET_ERROR(ENODEV
));
6119 } else if (!vd
->vdev_ops
->vdev_op_leaf
|| !vdev_is_concrete(vd
)) {
6120 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
6121 mutex_exit(&spa_namespace_lock
);
6122 return (SET_ERROR(EINVAL
));
6123 } else if (!vdev_writeable(vd
)) {
6124 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
6125 mutex_exit(&spa_namespace_lock
);
6126 return (SET_ERROR(EROFS
));
6128 mutex_enter(&vd
->vdev_initialize_lock
);
6129 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
6132 * When we activate an initialize action we check to see
6133 * if the vdev_initialize_thread is NULL. We do this instead
6134 * of using the vdev_initialize_state since there might be
6135 * a previous initialization process which has completed but
6136 * the thread is not exited.
6138 if (cmd_type
== POOL_INITIALIZE_DO
&&
6139 (vd
->vdev_initialize_thread
!= NULL
||
6140 vd
->vdev_top
->vdev_removing
)) {
6141 mutex_exit(&vd
->vdev_initialize_lock
);
6142 mutex_exit(&spa_namespace_lock
);
6143 return (SET_ERROR(EBUSY
));
6144 } else if (cmd_type
== POOL_INITIALIZE_CANCEL
&&
6145 (vd
->vdev_initialize_state
!= VDEV_INITIALIZE_ACTIVE
&&
6146 vd
->vdev_initialize_state
!= VDEV_INITIALIZE_SUSPENDED
)) {
6147 mutex_exit(&vd
->vdev_initialize_lock
);
6148 mutex_exit(&spa_namespace_lock
);
6149 return (SET_ERROR(ESRCH
));
6150 } else if (cmd_type
== POOL_INITIALIZE_SUSPEND
&&
6151 vd
->vdev_initialize_state
!= VDEV_INITIALIZE_ACTIVE
) {
6152 mutex_exit(&vd
->vdev_initialize_lock
);
6153 mutex_exit(&spa_namespace_lock
);
6154 return (SET_ERROR(ESRCH
));
6158 case POOL_INITIALIZE_DO
:
6159 vdev_initialize(vd
);
6161 case POOL_INITIALIZE_CANCEL
:
6162 vdev_initialize_stop(vd
, VDEV_INITIALIZE_CANCELED
);
6164 case POOL_INITIALIZE_SUSPEND
:
6165 vdev_initialize_stop(vd
, VDEV_INITIALIZE_SUSPENDED
);
6168 panic("invalid cmd_type %llu", (unsigned long long)cmd_type
);
6170 mutex_exit(&vd
->vdev_initialize_lock
);
6172 /* Sync out the initializing state */
6173 txg_wait_synced(spa
->spa_dsl_pool
, 0);
6174 mutex_exit(&spa_namespace_lock
);
6181 * Split a set of devices from their mirrors, and create a new pool from them.
6184 spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
6185 nvlist_t
*props
, boolean_t exp
)
6188 uint64_t txg
, *glist
;
6190 uint_t c
, children
, lastlog
;
6191 nvlist_t
**child
, *nvl
, *tmp
;
6193 char *altroot
= NULL
;
6194 vdev_t
*rvd
, **vml
= NULL
; /* vdev modify list */
6195 boolean_t activate_slog
;
6197 ASSERT(spa_writeable(spa
));
6199 txg
= spa_vdev_enter(spa
);
6201 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
6202 if (spa_feature_is_active(spa
, SPA_FEATURE_POOL_CHECKPOINT
)) {
6203 error
= (spa_has_checkpoint(spa
)) ?
6204 ZFS_ERR_CHECKPOINT_EXISTS
: ZFS_ERR_DISCARDING_CHECKPOINT
;
6205 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
6208 /* clear the log and flush everything up to now */
6209 activate_slog
= spa_passivate_log(spa
);
6210 (void) spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
6211 error
= spa_reset_logs(spa
);
6212 txg
= spa_vdev_config_enter(spa
);
6215 spa_activate_log(spa
);
6218 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
6220 /* check new spa name before going any further */
6221 if (spa_lookup(newname
) != NULL
)
6222 return (spa_vdev_exit(spa
, NULL
, txg
, EEXIST
));
6225 * scan through all the children to ensure they're all mirrors
6227 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
) != 0 ||
6228 nvlist_lookup_nvlist_array(nvl
, ZPOOL_CONFIG_CHILDREN
, &child
,
6230 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
6232 /* first, check to ensure we've got the right child count */
6233 rvd
= spa
->spa_root_vdev
;
6235 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
6236 vdev_t
*vd
= rvd
->vdev_child
[c
];
6238 /* don't count the holes & logs as children */
6239 if (vd
->vdev_islog
|| !vdev_is_concrete(vd
)) {
6247 if (children
!= (lastlog
!= 0 ? lastlog
: rvd
->vdev_children
))
6248 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
6250 /* next, ensure no spare or cache devices are part of the split */
6251 if (nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_SPARES
, &tmp
) == 0 ||
6252 nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_L2CACHE
, &tmp
) == 0)
6253 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
6255 vml
= kmem_zalloc(children
* sizeof (vdev_t
*), KM_SLEEP
);
6256 glist
= kmem_zalloc(children
* sizeof (uint64_t), KM_SLEEP
);
6258 /* then, loop over each vdev and validate it */
6259 for (c
= 0; c
< children
; c
++) {
6260 uint64_t is_hole
= 0;
6262 (void) nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_IS_HOLE
,
6266 if (spa
->spa_root_vdev
->vdev_child
[c
]->vdev_ishole
||
6267 spa
->spa_root_vdev
->vdev_child
[c
]->vdev_islog
) {
6270 error
= SET_ERROR(EINVAL
);
6275 /* which disk is going to be split? */
6276 if (nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_GUID
,
6278 error
= SET_ERROR(EINVAL
);
6282 /* look it up in the spa */
6283 vml
[c
] = spa_lookup_by_guid(spa
, glist
[c
], B_FALSE
);
6284 if (vml
[c
] == NULL
) {
6285 error
= SET_ERROR(ENODEV
);
6289 /* make sure there's nothing stopping the split */
6290 if (vml
[c
]->vdev_parent
->vdev_ops
!= &vdev_mirror_ops
||
6291 vml
[c
]->vdev_islog
||
6292 !vdev_is_concrete(vml
[c
]) ||
6293 vml
[c
]->vdev_isspare
||
6294 vml
[c
]->vdev_isl2cache
||
6295 !vdev_writeable(vml
[c
]) ||
6296 vml
[c
]->vdev_children
!= 0 ||
6297 vml
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
||
6298 c
!= spa
->spa_root_vdev
->vdev_child
[c
]->vdev_id
) {
6299 error
= SET_ERROR(EINVAL
);
6303 if (vdev_dtl_required(vml
[c
])) {
6304 error
= SET_ERROR(EBUSY
);
6308 /* we need certain info from the top level */
6309 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_ARRAY
,
6310 vml
[c
]->vdev_top
->vdev_ms_array
) == 0);
6311 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_SHIFT
,
6312 vml
[c
]->vdev_top
->vdev_ms_shift
) == 0);
6313 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASIZE
,
6314 vml
[c
]->vdev_top
->vdev_asize
) == 0);
6315 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASHIFT
,
6316 vml
[c
]->vdev_top
->vdev_ashift
) == 0);
6318 /* transfer per-vdev ZAPs */
6319 ASSERT3U(vml
[c
]->vdev_leaf_zap
, !=, 0);
6320 VERIFY0(nvlist_add_uint64(child
[c
],
6321 ZPOOL_CONFIG_VDEV_LEAF_ZAP
, vml
[c
]->vdev_leaf_zap
));
6323 ASSERT3U(vml
[c
]->vdev_top
->vdev_top_zap
, !=, 0);
6324 VERIFY0(nvlist_add_uint64(child
[c
],
6325 ZPOOL_CONFIG_VDEV_TOP_ZAP
,
6326 vml
[c
]->vdev_parent
->vdev_top_zap
));
6330 kmem_free(vml
, children
* sizeof (vdev_t
*));
6331 kmem_free(glist
, children
* sizeof (uint64_t));
6332 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
6335 /* stop writers from using the disks */
6336 for (c
= 0; c
< children
; c
++) {
6338 vml
[c
]->vdev_offline
= B_TRUE
;
6340 vdev_reopen(spa
->spa_root_vdev
);
6343 * Temporarily record the splitting vdevs in the spa config. This
6344 * will disappear once the config is regenerated.
6346 VERIFY(nvlist_alloc(&nvl
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
6347 VERIFY(nvlist_add_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
6348 glist
, children
) == 0);
6349 kmem_free(glist
, children
* sizeof (uint64_t));
6351 mutex_enter(&spa
->spa_props_lock
);
6352 VERIFY(nvlist_add_nvlist(spa
->spa_config
, ZPOOL_CONFIG_SPLIT
,
6354 mutex_exit(&spa
->spa_props_lock
);
6355 spa
->spa_config_splitting
= nvl
;
6356 vdev_config_dirty(spa
->spa_root_vdev
);
6358 /* configure and create the new pool */
6359 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
, newname
) == 0);
6360 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
6361 exp
? POOL_STATE_EXPORTED
: POOL_STATE_ACTIVE
) == 0);
6362 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
6363 spa_version(spa
)) == 0);
6364 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
6365 spa
->spa_config_txg
) == 0);
6366 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
6367 spa_generate_guid(NULL
)) == 0);
6368 VERIFY0(nvlist_add_boolean(config
, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS
));
6369 (void) nvlist_lookup_string(props
,
6370 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
6372 /* add the new pool to the namespace */
6373 newspa
= spa_add(newname
, config
, altroot
);
6374 newspa
->spa_avz_action
= AVZ_ACTION_REBUILD
;
6375 newspa
->spa_config_txg
= spa
->spa_config_txg
;
6376 spa_set_log_state(newspa
, SPA_LOG_CLEAR
);
6378 /* release the spa config lock, retaining the namespace lock */
6379 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
6381 if (zio_injection_enabled
)
6382 zio_handle_panic_injection(spa
, FTAG
, 1);
6384 spa_activate(newspa
, spa_mode_global
);
6385 spa_async_suspend(newspa
);
6387 for (c
= 0; c
< children
; c
++) {
6388 if (vml
[c
] != NULL
) {
6390 * Temporarily stop the initializing activity. We set
6391 * the state to ACTIVE so that we know to resume
6392 * the initializing once the split has completed.
6394 mutex_enter(&vml
[c
]->vdev_initialize_lock
);
6395 vdev_initialize_stop(vml
[c
], VDEV_INITIALIZE_ACTIVE
);
6396 mutex_exit(&vml
[c
]->vdev_initialize_lock
);
6400 newspa
->spa_config_source
= SPA_CONFIG_SRC_SPLIT
;
6402 /* create the new pool from the disks of the original pool */
6403 error
= spa_load(newspa
, SPA_LOAD_IMPORT
, SPA_IMPORT_ASSEMBLE
);
6407 /* if that worked, generate a real config for the new pool */
6408 if (newspa
->spa_root_vdev
!= NULL
) {
6409 VERIFY(nvlist_alloc(&newspa
->spa_config_splitting
,
6410 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
6411 VERIFY(nvlist_add_uint64(newspa
->spa_config_splitting
,
6412 ZPOOL_CONFIG_SPLIT_GUID
, spa_guid(spa
)) == 0);
6413 spa_config_set(newspa
, spa_config_generate(newspa
, NULL
, -1ULL,
6418 if (props
!= NULL
) {
6419 spa_configfile_set(newspa
, props
, B_FALSE
);
6420 error
= spa_prop_set(newspa
, props
);
6425 /* flush everything */
6426 txg
= spa_vdev_config_enter(newspa
);
6427 vdev_config_dirty(newspa
->spa_root_vdev
);
6428 (void) spa_vdev_config_exit(newspa
, NULL
, txg
, 0, FTAG
);
6430 if (zio_injection_enabled
)
6431 zio_handle_panic_injection(spa
, FTAG
, 2);
6433 spa_async_resume(newspa
);
6435 /* finally, update the original pool's config */
6436 txg
= spa_vdev_config_enter(spa
);
6437 tx
= dmu_tx_create_dd(spa_get_dsl(spa
)->dp_mos_dir
);
6438 error
= dmu_tx_assign(tx
, TXG_WAIT
);
6441 for (c
= 0; c
< children
; c
++) {
6442 if (vml
[c
] != NULL
) {
6445 spa_history_log_internal(spa
, "detach", tx
,
6446 "vdev=%s", vml
[c
]->vdev_path
);
6451 spa
->spa_avz_action
= AVZ_ACTION_REBUILD
;
6452 vdev_config_dirty(spa
->spa_root_vdev
);
6453 spa
->spa_config_splitting
= NULL
;
6457 (void) spa_vdev_exit(spa
, NULL
, txg
, 0);
6459 if (zio_injection_enabled
)
6460 zio_handle_panic_injection(spa
, FTAG
, 3);
6462 /* split is complete; log a history record */
6463 spa_history_log_internal(newspa
, "split", NULL
,
6464 "from pool %s", spa_name(spa
));
6466 kmem_free(vml
, children
* sizeof (vdev_t
*));
6468 /* if we're not going to mount the filesystems in userland, export */
6470 error
= spa_export_common(newname
, POOL_STATE_EXPORTED
, NULL
,
6477 spa_deactivate(newspa
);
6480 txg
= spa_vdev_config_enter(spa
);
6482 /* re-online all offlined disks */
6483 for (c
= 0; c
< children
; c
++) {
6485 vml
[c
]->vdev_offline
= B_FALSE
;
6488 /* restart initializing disks as necessary */
6489 spa_async_request(spa
, SPA_ASYNC_INITIALIZE_RESTART
);
6491 vdev_reopen(spa
->spa_root_vdev
);
6493 nvlist_free(spa
->spa_config_splitting
);
6494 spa
->spa_config_splitting
= NULL
;
6495 (void) spa_vdev_exit(spa
, NULL
, txg
, error
);
6497 kmem_free(vml
, children
* sizeof (vdev_t
*));
6502 * Find any device that's done replacing, or a vdev marked 'unspare' that's
6503 * currently spared, so we can detach it.
6506 spa_vdev_resilver_done_hunt(vdev_t
*vd
)
6508 vdev_t
*newvd
, *oldvd
;
6510 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
6511 oldvd
= spa_vdev_resilver_done_hunt(vd
->vdev_child
[c
]);
6517 * Check for a completed replacement. We always consider the first
6518 * vdev in the list to be the oldest vdev, and the last one to be
6519 * the newest (see spa_vdev_attach() for how that works). In
6520 * the case where the newest vdev is faulted, we will not automatically
6521 * remove it after a resilver completes. This is OK as it will require
6522 * user intervention to determine which disk the admin wishes to keep.
6524 if (vd
->vdev_ops
== &vdev_replacing_ops
) {
6525 ASSERT(vd
->vdev_children
> 1);
6527 newvd
= vd
->vdev_child
[vd
->vdev_children
- 1];
6528 oldvd
= vd
->vdev_child
[0];
6530 if (vdev_dtl_empty(newvd
, DTL_MISSING
) &&
6531 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
6532 !vdev_dtl_required(oldvd
))
6537 * Check for a completed resilver with the 'unspare' flag set.
6539 if (vd
->vdev_ops
== &vdev_spare_ops
) {
6540 vdev_t
*first
= vd
->vdev_child
[0];
6541 vdev_t
*last
= vd
->vdev_child
[vd
->vdev_children
- 1];
6543 if (last
->vdev_unspare
) {
6546 } else if (first
->vdev_unspare
) {
6553 if (oldvd
!= NULL
&&
6554 vdev_dtl_empty(newvd
, DTL_MISSING
) &&
6555 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
6556 !vdev_dtl_required(oldvd
))
6560 * If there are more than two spares attached to a disk,
6561 * and those spares are not required, then we want to
6562 * attempt to free them up now so that they can be used
6563 * by other pools. Once we're back down to a single
6564 * disk+spare, we stop removing them.
6566 if (vd
->vdev_children
> 2) {
6567 newvd
= vd
->vdev_child
[1];
6569 if (newvd
->vdev_isspare
&& last
->vdev_isspare
&&
6570 vdev_dtl_empty(last
, DTL_MISSING
) &&
6571 vdev_dtl_empty(last
, DTL_OUTAGE
) &&
6572 !vdev_dtl_required(newvd
))
6581 spa_vdev_resilver_done(spa_t
*spa
)
6583 vdev_t
*vd
, *pvd
, *ppvd
;
6584 uint64_t guid
, sguid
, pguid
, ppguid
;
6586 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
6588 while ((vd
= spa_vdev_resilver_done_hunt(spa
->spa_root_vdev
)) != NULL
) {
6589 pvd
= vd
->vdev_parent
;
6590 ppvd
= pvd
->vdev_parent
;
6591 guid
= vd
->vdev_guid
;
6592 pguid
= pvd
->vdev_guid
;
6593 ppguid
= ppvd
->vdev_guid
;
6596 * If we have just finished replacing a hot spared device, then
6597 * we need to detach the parent's first child (the original hot
6600 if (ppvd
->vdev_ops
== &vdev_spare_ops
&& pvd
->vdev_id
== 0 &&
6601 ppvd
->vdev_children
== 2) {
6602 ASSERT(pvd
->vdev_ops
== &vdev_replacing_ops
);
6603 sguid
= ppvd
->vdev_child
[1]->vdev_guid
;
6605 ASSERT(vd
->vdev_resilver_txg
== 0 || !vdev_dtl_required(vd
));
6607 spa_config_exit(spa
, SCL_ALL
, FTAG
);
6608 if (spa_vdev_detach(spa
, guid
, pguid
, B_TRUE
) != 0)
6610 if (sguid
&& spa_vdev_detach(spa
, sguid
, ppguid
, B_TRUE
) != 0)
6612 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
6615 spa_config_exit(spa
, SCL_ALL
, FTAG
);
6619 * Update the stored path or FRU for this vdev.
6622 spa_vdev_set_common(spa_t
*spa
, uint64_t guid
, const char *value
,
6626 boolean_t sync
= B_FALSE
;
6628 ASSERT(spa_writeable(spa
));
6630 spa_vdev_state_enter(spa
, SCL_ALL
);
6632 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
6633 return (spa_vdev_state_exit(spa
, NULL
, ENOENT
));
6635 if (!vd
->vdev_ops
->vdev_op_leaf
)
6636 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
6639 if (strcmp(value
, vd
->vdev_path
) != 0) {
6640 spa_strfree(vd
->vdev_path
);
6641 vd
->vdev_path
= spa_strdup(value
);
6645 if (vd
->vdev_fru
== NULL
) {
6646 vd
->vdev_fru
= spa_strdup(value
);
6648 } else if (strcmp(value
, vd
->vdev_fru
) != 0) {
6649 spa_strfree(vd
->vdev_fru
);
6650 vd
->vdev_fru
= spa_strdup(value
);
6655 return (spa_vdev_state_exit(spa
, sync
? vd
: NULL
, 0));
6659 spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
)
6661 return (spa_vdev_set_common(spa
, guid
, newpath
, B_TRUE
));
6665 spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
)
6667 return (spa_vdev_set_common(spa
, guid
, newfru
, B_FALSE
));
6671 * ==========================================================================
6673 * ==========================================================================
6676 spa_scrub_pause_resume(spa_t
*spa
, pool_scrub_cmd_t cmd
)
6678 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
6680 if (dsl_scan_resilvering(spa
->spa_dsl_pool
))
6681 return (SET_ERROR(EBUSY
));
6683 return (dsl_scrub_set_pause_resume(spa
->spa_dsl_pool
, cmd
));
6687 spa_scan_stop(spa_t
*spa
)
6689 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
6690 if (dsl_scan_resilvering(spa
->spa_dsl_pool
))
6691 return (SET_ERROR(EBUSY
));
6692 return (dsl_scan_cancel(spa
->spa_dsl_pool
));
6696 spa_scan(spa_t
*spa
, pool_scan_func_t func
)
6698 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
6700 if (func
>= POOL_SCAN_FUNCS
|| func
== POOL_SCAN_NONE
)
6701 return (SET_ERROR(ENOTSUP
));
6704 * If a resilver was requested, but there is no DTL on a
6705 * writeable leaf device, we have nothing to do.
6707 if (func
== POOL_SCAN_RESILVER
&&
6708 !vdev_resilver_needed(spa
->spa_root_vdev
, NULL
, NULL
)) {
6709 spa_async_request(spa
, SPA_ASYNC_RESILVER_DONE
);
6713 return (dsl_scan(spa
->spa_dsl_pool
, func
));
6717 * ==========================================================================
6718 * SPA async task processing
6719 * ==========================================================================
6723 spa_async_remove(spa_t
*spa
, vdev_t
*vd
)
6725 if (vd
->vdev_remove_wanted
) {
6726 vd
->vdev_remove_wanted
= B_FALSE
;
6727 vd
->vdev_delayed_close
= B_FALSE
;
6728 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_REMOVED
, VDEV_AUX_NONE
);
6731 * We want to clear the stats, but we don't want to do a full
6732 * vdev_clear() as that will cause us to throw away
6733 * degraded/faulted state as well as attempt to reopen the
6734 * device, all of which is a waste.
6736 vd
->vdev_stat
.vs_read_errors
= 0;
6737 vd
->vdev_stat
.vs_write_errors
= 0;
6738 vd
->vdev_stat
.vs_checksum_errors
= 0;
6740 vdev_state_dirty(vd
->vdev_top
);
6743 for (int c
= 0; c
< vd
->vdev_children
; c
++)
6744 spa_async_remove(spa
, vd
->vdev_child
[c
]);
6748 spa_async_probe(spa_t
*spa
, vdev_t
*vd
)
6750 if (vd
->vdev_probe_wanted
) {
6751 vd
->vdev_probe_wanted
= B_FALSE
;
6752 vdev_reopen(vd
); /* vdev_open() does the actual probe */
6755 for (int c
= 0; c
< vd
->vdev_children
; c
++)
6756 spa_async_probe(spa
, vd
->vdev_child
[c
]);
6760 spa_async_autoexpand(spa_t
*spa
, vdev_t
*vd
)
6766 if (!spa
->spa_autoexpand
)
6769 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
6770 vdev_t
*cvd
= vd
->vdev_child
[c
];
6771 spa_async_autoexpand(spa
, cvd
);
6774 if (!vd
->vdev_ops
->vdev_op_leaf
|| vd
->vdev_physpath
== NULL
)
6777 physpath
= kmem_zalloc(MAXPATHLEN
, KM_SLEEP
);
6778 (void) snprintf(physpath
, MAXPATHLEN
, "/devices%s", vd
->vdev_physpath
);
6780 VERIFY(nvlist_alloc(&attr
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
6781 VERIFY(nvlist_add_string(attr
, DEV_PHYS_PATH
, physpath
) == 0);
6783 (void) ddi_log_sysevent(zfs_dip
, SUNW_VENDOR
, EC_DEV_STATUS
,
6784 ESC_DEV_DLE
, attr
, &eid
, DDI_SLEEP
);
6787 kmem_free(physpath
, MAXPATHLEN
);
6791 spa_async_thread(void *arg
)
6793 spa_t
*spa
= (spa_t
*)arg
;
6796 ASSERT(spa
->spa_sync_on
);
6798 mutex_enter(&spa
->spa_async_lock
);
6799 tasks
= spa
->spa_async_tasks
;
6800 spa
->spa_async_tasks
= 0;
6801 mutex_exit(&spa
->spa_async_lock
);
6804 * See if the config needs to be updated.
6806 if (tasks
& SPA_ASYNC_CONFIG_UPDATE
) {
6807 uint64_t old_space
, new_space
;
6809 mutex_enter(&spa_namespace_lock
);
6810 old_space
= metaslab_class_get_space(spa_normal_class(spa
));
6811 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
6812 new_space
= metaslab_class_get_space(spa_normal_class(spa
));
6813 mutex_exit(&spa_namespace_lock
);
6816 * If the pool grew as a result of the config update,
6817 * then log an internal history event.
6819 if (new_space
!= old_space
) {
6820 spa_history_log_internal(spa
, "vdev online", NULL
,
6821 "pool '%s' size: %llu(+%llu)",
6822 spa_name(spa
), new_space
, new_space
- old_space
);
6827 * See if any devices need to be marked REMOVED.
6829 if (tasks
& SPA_ASYNC_REMOVE
) {
6830 spa_vdev_state_enter(spa
, SCL_NONE
);
6831 spa_async_remove(spa
, spa
->spa_root_vdev
);
6832 for (int i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
6833 spa_async_remove(spa
, spa
->spa_l2cache
.sav_vdevs
[i
]);
6834 for (int i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
6835 spa_async_remove(spa
, spa
->spa_spares
.sav_vdevs
[i
]);
6836 (void) spa_vdev_state_exit(spa
, NULL
, 0);
6839 if ((tasks
& SPA_ASYNC_AUTOEXPAND
) && !spa_suspended(spa
)) {
6840 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
6841 spa_async_autoexpand(spa
, spa
->spa_root_vdev
);
6842 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
6846 * See if any devices need to be probed.
6848 if (tasks
& SPA_ASYNC_PROBE
) {
6849 spa_vdev_state_enter(spa
, SCL_NONE
);
6850 spa_async_probe(spa
, spa
->spa_root_vdev
);
6851 (void) spa_vdev_state_exit(spa
, NULL
, 0);
6855 * If any devices are done replacing, detach them.
6857 if (tasks
& SPA_ASYNC_RESILVER_DONE
)
6858 spa_vdev_resilver_done(spa
);
6861 * Kick off a resilver.
6863 if (tasks
& SPA_ASYNC_RESILVER
)
6864 dsl_resilver_restart(spa
->spa_dsl_pool
, 0);
6866 if (tasks
& SPA_ASYNC_INITIALIZE_RESTART
) {
6867 mutex_enter(&spa_namespace_lock
);
6868 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
6869 vdev_initialize_restart(spa
->spa_root_vdev
);
6870 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
6871 mutex_exit(&spa_namespace_lock
);
6875 * Let the world know that we're done.
6877 mutex_enter(&spa
->spa_async_lock
);
6878 spa
->spa_async_thread
= NULL
;
6879 cv_broadcast(&spa
->spa_async_cv
);
6880 mutex_exit(&spa
->spa_async_lock
);
6885 spa_async_suspend(spa_t
*spa
)
6887 mutex_enter(&spa
->spa_async_lock
);
6888 spa
->spa_async_suspended
++;
6889 while (spa
->spa_async_thread
!= NULL
)
6890 cv_wait(&spa
->spa_async_cv
, &spa
->spa_async_lock
);
6891 mutex_exit(&spa
->spa_async_lock
);
6893 spa_vdev_remove_suspend(spa
);
6895 zthr_t
*condense_thread
= spa
->spa_condense_zthr
;
6896 if (condense_thread
!= NULL
&& zthr_isrunning(condense_thread
))
6897 VERIFY0(zthr_cancel(condense_thread
));
6899 zthr_t
*discard_thread
= spa
->spa_checkpoint_discard_zthr
;
6900 if (discard_thread
!= NULL
&& zthr_isrunning(discard_thread
))
6901 VERIFY0(zthr_cancel(discard_thread
));
6905 spa_async_resume(spa_t
*spa
)
6907 mutex_enter(&spa
->spa_async_lock
);
6908 ASSERT(spa
->spa_async_suspended
!= 0);
6909 spa
->spa_async_suspended
--;
6910 mutex_exit(&spa
->spa_async_lock
);
6911 spa_restart_removal(spa
);
6913 zthr_t
*condense_thread
= spa
->spa_condense_zthr
;
6914 if (condense_thread
!= NULL
&& !zthr_isrunning(condense_thread
))
6915 zthr_resume(condense_thread
);
6917 zthr_t
*discard_thread
= spa
->spa_checkpoint_discard_zthr
;
6918 if (discard_thread
!= NULL
&& !zthr_isrunning(discard_thread
))
6919 zthr_resume(discard_thread
);
6923 spa_async_tasks_pending(spa_t
*spa
)
6925 uint_t non_config_tasks
;
6927 boolean_t config_task_suspended
;
6929 non_config_tasks
= spa
->spa_async_tasks
& ~SPA_ASYNC_CONFIG_UPDATE
;
6930 config_task
= spa
->spa_async_tasks
& SPA_ASYNC_CONFIG_UPDATE
;
6931 if (spa
->spa_ccw_fail_time
== 0) {
6932 config_task_suspended
= B_FALSE
;
6934 config_task_suspended
=
6935 (gethrtime() - spa
->spa_ccw_fail_time
) <
6936 (zfs_ccw_retry_interval
* NANOSEC
);
6939 return (non_config_tasks
|| (config_task
&& !config_task_suspended
));
6943 spa_async_dispatch(spa_t
*spa
)
6945 mutex_enter(&spa
->spa_async_lock
);
6946 if (spa_async_tasks_pending(spa
) &&
6947 !spa
->spa_async_suspended
&&
6948 spa
->spa_async_thread
== NULL
&&
6950 spa
->spa_async_thread
= thread_create(NULL
, 0,
6951 spa_async_thread
, spa
, 0, &p0
, TS_RUN
, maxclsyspri
);
6952 mutex_exit(&spa
->spa_async_lock
);
6956 spa_async_request(spa_t
*spa
, int task
)
6958 zfs_dbgmsg("spa=%s async request task=%u", spa
->spa_name
, task
);
6959 mutex_enter(&spa
->spa_async_lock
);
6960 spa
->spa_async_tasks
|= task
;
6961 mutex_exit(&spa
->spa_async_lock
);
6965 * ==========================================================================
6966 * SPA syncing routines
6967 * ==========================================================================
6971 bpobj_enqueue_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
6974 bpobj_enqueue(bpo
, bp
, tx
);
6979 spa_free_sync_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
6983 zio_nowait(zio_free_sync(zio
, zio
->io_spa
, dmu_tx_get_txg(tx
), bp
,
6989 * Note: this simple function is not inlined to make it easier to dtrace the
6990 * amount of time spent syncing frees.
6993 spa_sync_frees(spa_t
*spa
, bplist_t
*bpl
, dmu_tx_t
*tx
)
6995 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
6996 bplist_iterate(bpl
, spa_free_sync_cb
, zio
, tx
);
6997 VERIFY(zio_wait(zio
) == 0);
7001 * Note: this simple function is not inlined to make it easier to dtrace the
7002 * amount of time spent syncing deferred frees.
7005 spa_sync_deferred_frees(spa_t
*spa
, dmu_tx_t
*tx
)
7007 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
7008 VERIFY3U(bpobj_iterate(&spa
->spa_deferred_bpobj
,
7009 spa_free_sync_cb
, zio
, tx
), ==, 0);
7010 VERIFY0(zio_wait(zio
));
7015 spa_sync_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
*nv
, dmu_tx_t
*tx
)
7017 char *packed
= NULL
;
7022 VERIFY(nvlist_size(nv
, &nvsize
, NV_ENCODE_XDR
) == 0);
7025 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
7026 * information. This avoids the dmu_buf_will_dirty() path and
7027 * saves us a pre-read to get data we don't actually care about.
7029 bufsize
= P2ROUNDUP((uint64_t)nvsize
, SPA_CONFIG_BLOCKSIZE
);
7030 packed
= kmem_alloc(bufsize
, KM_SLEEP
);
7032 VERIFY(nvlist_pack(nv
, &packed
, &nvsize
, NV_ENCODE_XDR
,
7034 bzero(packed
+ nvsize
, bufsize
- nvsize
);
7036 dmu_write(spa
->spa_meta_objset
, obj
, 0, bufsize
, packed
, tx
);
7038 kmem_free(packed
, bufsize
);
7040 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
7041 dmu_buf_will_dirty(db
, tx
);
7042 *(uint64_t *)db
->db_data
= nvsize
;
7043 dmu_buf_rele(db
, FTAG
);
7047 spa_sync_aux_dev(spa_t
*spa
, spa_aux_vdev_t
*sav
, dmu_tx_t
*tx
,
7048 const char *config
, const char *entry
)
7058 * Update the MOS nvlist describing the list of available devices.
7059 * spa_validate_aux() will have already made sure this nvlist is
7060 * valid and the vdevs are labeled appropriately.
7062 if (sav
->sav_object
== 0) {
7063 sav
->sav_object
= dmu_object_alloc(spa
->spa_meta_objset
,
7064 DMU_OT_PACKED_NVLIST
, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE
,
7065 sizeof (uint64_t), tx
);
7066 VERIFY(zap_update(spa
->spa_meta_objset
,
7067 DMU_POOL_DIRECTORY_OBJECT
, entry
, sizeof (uint64_t), 1,
7068 &sav
->sav_object
, tx
) == 0);
7071 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
7072 if (sav
->sav_count
== 0) {
7073 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, NULL
, 0) == 0);
7075 list
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
7076 for (i
= 0; i
< sav
->sav_count
; i
++)
7077 list
[i
] = vdev_config_generate(spa
, sav
->sav_vdevs
[i
],
7078 B_FALSE
, VDEV_CONFIG_L2CACHE
);
7079 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, list
,
7080 sav
->sav_count
) == 0);
7081 for (i
= 0; i
< sav
->sav_count
; i
++)
7082 nvlist_free(list
[i
]);
7083 kmem_free(list
, sav
->sav_count
* sizeof (void *));
7086 spa_sync_nvlist(spa
, sav
->sav_object
, nvroot
, tx
);
7087 nvlist_free(nvroot
);
7089 sav
->sav_sync
= B_FALSE
;
7093 * Rebuild spa's all-vdev ZAP from the vdev ZAPs indicated in each vdev_t.
7094 * The all-vdev ZAP must be empty.
7097 spa_avz_build(vdev_t
*vd
, uint64_t avz
, dmu_tx_t
*tx
)
7099 spa_t
*spa
= vd
->vdev_spa
;
7100 if (vd
->vdev_top_zap
!= 0) {
7101 VERIFY0(zap_add_int(spa
->spa_meta_objset
, avz
,
7102 vd
->vdev_top_zap
, tx
));
7104 if (vd
->vdev_leaf_zap
!= 0) {
7105 VERIFY0(zap_add_int(spa
->spa_meta_objset
, avz
,
7106 vd
->vdev_leaf_zap
, tx
));
7108 for (uint64_t i
= 0; i
< vd
->vdev_children
; i
++) {
7109 spa_avz_build(vd
->vdev_child
[i
], avz
, tx
);
7114 spa_sync_config_object(spa_t
*spa
, dmu_tx_t
*tx
)
7119 * If the pool is being imported from a pre-per-vdev-ZAP version of ZFS,
7120 * its config may not be dirty but we still need to build per-vdev ZAPs.
7121 * Similarly, if the pool is being assembled (e.g. after a split), we
7122 * need to rebuild the AVZ although the config may not be dirty.
7124 if (list_is_empty(&spa
->spa_config_dirty_list
) &&
7125 spa
->spa_avz_action
== AVZ_ACTION_NONE
)
7128 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
7130 ASSERT(spa
->spa_avz_action
== AVZ_ACTION_NONE
||
7131 spa
->spa_avz_action
== AVZ_ACTION_INITIALIZE
||
7132 spa
->spa_all_vdev_zaps
!= 0);
7134 if (spa
->spa_avz_action
== AVZ_ACTION_REBUILD
) {
7135 /* Make and build the new AVZ */
7136 uint64_t new_avz
= zap_create(spa
->spa_meta_objset
,
7137 DMU_OTN_ZAP_METADATA
, DMU_OT_NONE
, 0, tx
);
7138 spa_avz_build(spa
->spa_root_vdev
, new_avz
, tx
);
7140 /* Diff old AVZ with new one */
7144 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
7145 spa
->spa_all_vdev_zaps
);
7146 zap_cursor_retrieve(&zc
, &za
) == 0;
7147 zap_cursor_advance(&zc
)) {
7148 uint64_t vdzap
= za
.za_first_integer
;
7149 if (zap_lookup_int(spa
->spa_meta_objset
, new_avz
,
7152 * ZAP is listed in old AVZ but not in new one;
7155 VERIFY0(zap_destroy(spa
->spa_meta_objset
, vdzap
,
7160 zap_cursor_fini(&zc
);
7162 /* Destroy the old AVZ */
7163 VERIFY0(zap_destroy(spa
->spa_meta_objset
,
7164 spa
->spa_all_vdev_zaps
, tx
));
7166 /* Replace the old AVZ in the dir obj with the new one */
7167 VERIFY0(zap_update(spa
->spa_meta_objset
,
7168 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_VDEV_ZAP_MAP
,
7169 sizeof (new_avz
), 1, &new_avz
, tx
));
7171 spa
->spa_all_vdev_zaps
= new_avz
;
7172 } else if (spa
->spa_avz_action
== AVZ_ACTION_DESTROY
) {
7176 /* Walk through the AVZ and destroy all listed ZAPs */
7177 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
7178 spa
->spa_all_vdev_zaps
);
7179 zap_cursor_retrieve(&zc
, &za
) == 0;
7180 zap_cursor_advance(&zc
)) {
7181 uint64_t zap
= za
.za_first_integer
;
7182 VERIFY0(zap_destroy(spa
->spa_meta_objset
, zap
, tx
));
7185 zap_cursor_fini(&zc
);
7187 /* Destroy and unlink the AVZ itself */
7188 VERIFY0(zap_destroy(spa
->spa_meta_objset
,
7189 spa
->spa_all_vdev_zaps
, tx
));
7190 VERIFY0(zap_remove(spa
->spa_meta_objset
,
7191 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_VDEV_ZAP_MAP
, tx
));
7192 spa
->spa_all_vdev_zaps
= 0;
7195 if (spa
->spa_all_vdev_zaps
== 0) {
7196 spa
->spa_all_vdev_zaps
= zap_create_link(spa
->spa_meta_objset
,
7197 DMU_OTN_ZAP_METADATA
, DMU_POOL_DIRECTORY_OBJECT
,
7198 DMU_POOL_VDEV_ZAP_MAP
, tx
);
7200 spa
->spa_avz_action
= AVZ_ACTION_NONE
;
7202 /* Create ZAPs for vdevs that don't have them. */
7203 vdev_construct_zaps(spa
->spa_root_vdev
, tx
);
7205 config
= spa_config_generate(spa
, spa
->spa_root_vdev
,
7206 dmu_tx_get_txg(tx
), B_FALSE
);
7209 * If we're upgrading the spa version then make sure that
7210 * the config object gets updated with the correct version.
7212 if (spa
->spa_ubsync
.ub_version
< spa
->spa_uberblock
.ub_version
)
7213 fnvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
7214 spa
->spa_uberblock
.ub_version
);
7216 spa_config_exit(spa
, SCL_STATE
, FTAG
);
7218 nvlist_free(spa
->spa_config_syncing
);
7219 spa
->spa_config_syncing
= config
;
7221 spa_sync_nvlist(spa
, spa
->spa_config_object
, config
, tx
);
7225 spa_sync_version(void *arg
, dmu_tx_t
*tx
)
7227 uint64_t *versionp
= arg
;
7228 uint64_t version
= *versionp
;
7229 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
7232 * Setting the version is special cased when first creating the pool.
7234 ASSERT(tx
->tx_txg
!= TXG_INITIAL
);
7236 ASSERT(SPA_VERSION_IS_SUPPORTED(version
));
7237 ASSERT(version
>= spa_version(spa
));
7239 spa
->spa_uberblock
.ub_version
= version
;
7240 vdev_config_dirty(spa
->spa_root_vdev
);
7241 spa_history_log_internal(spa
, "set", tx
, "version=%lld", version
);
7245 * Set zpool properties.
7248 spa_sync_props(void *arg
, dmu_tx_t
*tx
)
7250 nvlist_t
*nvp
= arg
;
7251 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
7252 objset_t
*mos
= spa
->spa_meta_objset
;
7253 nvpair_t
*elem
= NULL
;
7255 mutex_enter(&spa
->spa_props_lock
);
7257 while ((elem
= nvlist_next_nvpair(nvp
, elem
))) {
7259 char *strval
, *fname
;
7261 const char *propname
;
7262 zprop_type_t proptype
;
7265 switch (prop
= zpool_name_to_prop(nvpair_name(elem
))) {
7266 case ZPOOL_PROP_INVAL
:
7268 * We checked this earlier in spa_prop_validate().
7270 ASSERT(zpool_prop_feature(nvpair_name(elem
)));
7272 fname
= strchr(nvpair_name(elem
), '@') + 1;
7273 VERIFY0(zfeature_lookup_name(fname
, &fid
));
7275 spa_feature_enable(spa
, fid
, tx
);
7276 spa_history_log_internal(spa
, "set", tx
,
7277 "%s=enabled", nvpair_name(elem
));
7280 case ZPOOL_PROP_VERSION
:
7281 intval
= fnvpair_value_uint64(elem
);
7283 * The version is synced seperatly before other
7284 * properties and should be correct by now.
7286 ASSERT3U(spa_version(spa
), >=, intval
);
7289 case ZPOOL_PROP_ALTROOT
:
7291 * 'altroot' is a non-persistent property. It should
7292 * have been set temporarily at creation or import time.
7294 ASSERT(spa
->spa_root
!= NULL
);
7297 case ZPOOL_PROP_READONLY
:
7298 case ZPOOL_PROP_CACHEFILE
:
7300 * 'readonly' and 'cachefile' are also non-persisitent
7304 case ZPOOL_PROP_COMMENT
:
7305 strval
= fnvpair_value_string(elem
);
7306 if (spa
->spa_comment
!= NULL
)
7307 spa_strfree(spa
->spa_comment
);
7308 spa
->spa_comment
= spa_strdup(strval
);
7310 * We need to dirty the configuration on all the vdevs
7311 * so that their labels get updated. It's unnecessary
7312 * to do this for pool creation since the vdev's
7313 * configuratoin has already been dirtied.
7315 if (tx
->tx_txg
!= TXG_INITIAL
)
7316 vdev_config_dirty(spa
->spa_root_vdev
);
7317 spa_history_log_internal(spa
, "set", tx
,
7318 "%s=%s", nvpair_name(elem
), strval
);
7322 * Set pool property values in the poolprops mos object.
7324 if (spa
->spa_pool_props_object
== 0) {
7325 spa
->spa_pool_props_object
=
7326 zap_create_link(mos
, DMU_OT_POOL_PROPS
,
7327 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_PROPS
,
7331 /* normalize the property name */
7332 propname
= zpool_prop_to_name(prop
);
7333 proptype
= zpool_prop_get_type(prop
);
7335 if (nvpair_type(elem
) == DATA_TYPE_STRING
) {
7336 ASSERT(proptype
== PROP_TYPE_STRING
);
7337 strval
= fnvpair_value_string(elem
);
7338 VERIFY0(zap_update(mos
,
7339 spa
->spa_pool_props_object
, propname
,
7340 1, strlen(strval
) + 1, strval
, tx
));
7341 spa_history_log_internal(spa
, "set", tx
,
7342 "%s=%s", nvpair_name(elem
), strval
);
7343 } else if (nvpair_type(elem
) == DATA_TYPE_UINT64
) {
7344 intval
= fnvpair_value_uint64(elem
);
7346 if (proptype
== PROP_TYPE_INDEX
) {
7348 VERIFY0(zpool_prop_index_to_string(
7349 prop
, intval
, &unused
));
7351 VERIFY0(zap_update(mos
,
7352 spa
->spa_pool_props_object
, propname
,
7353 8, 1, &intval
, tx
));
7354 spa_history_log_internal(spa
, "set", tx
,
7355 "%s=%lld", nvpair_name(elem
), intval
);
7357 ASSERT(0); /* not allowed */
7361 case ZPOOL_PROP_DELEGATION
:
7362 spa
->spa_delegation
= intval
;
7364 case ZPOOL_PROP_BOOTFS
:
7365 spa
->spa_bootfs
= intval
;
7367 case ZPOOL_PROP_FAILUREMODE
:
7368 spa
->spa_failmode
= intval
;
7370 case ZPOOL_PROP_AUTOEXPAND
:
7371 spa
->spa_autoexpand
= intval
;
7372 if (tx
->tx_txg
!= TXG_INITIAL
)
7373 spa_async_request(spa
,
7374 SPA_ASYNC_AUTOEXPAND
);
7376 case ZPOOL_PROP_DEDUPDITTO
:
7377 spa
->spa_dedup_ditto
= intval
;
7386 mutex_exit(&spa
->spa_props_lock
);
7390 * Perform one-time upgrade on-disk changes. spa_version() does not
7391 * reflect the new version this txg, so there must be no changes this
7392 * txg to anything that the upgrade code depends on after it executes.
7393 * Therefore this must be called after dsl_pool_sync() does the sync
7397 spa_sync_upgrades(spa_t
*spa
, dmu_tx_t
*tx
)
7399 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
7401 ASSERT(spa
->spa_sync_pass
== 1);
7403 rrw_enter(&dp
->dp_config_rwlock
, RW_WRITER
, FTAG
);
7405 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_ORIGIN
&&
7406 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_ORIGIN
) {
7407 dsl_pool_create_origin(dp
, tx
);
7409 /* Keeping the origin open increases spa_minref */
7410 spa
->spa_minref
+= 3;
7413 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_NEXT_CLONES
&&
7414 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_NEXT_CLONES
) {
7415 dsl_pool_upgrade_clones(dp
, tx
);
7418 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_DIR_CLONES
&&
7419 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_DIR_CLONES
) {
7420 dsl_pool_upgrade_dir_clones(dp
, tx
);
7422 /* Keeping the freedir open increases spa_minref */
7423 spa
->spa_minref
+= 3;
7426 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_FEATURES
&&
7427 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_FEATURES
) {
7428 spa_feature_create_zap_objects(spa
, tx
);
7432 * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable
7433 * when possibility to use lz4 compression for metadata was added
7434 * Old pools that have this feature enabled must be upgraded to have
7435 * this feature active
7437 if (spa
->spa_uberblock
.ub_version
>= SPA_VERSION_FEATURES
) {
7438 boolean_t lz4_en
= spa_feature_is_enabled(spa
,
7439 SPA_FEATURE_LZ4_COMPRESS
);
7440 boolean_t lz4_ac
= spa_feature_is_active(spa
,
7441 SPA_FEATURE_LZ4_COMPRESS
);
7443 if (lz4_en
&& !lz4_ac
)
7444 spa_feature_incr(spa
, SPA_FEATURE_LZ4_COMPRESS
, tx
);
7448 * If we haven't written the salt, do so now. Note that the
7449 * feature may not be activated yet, but that's fine since
7450 * the presence of this ZAP entry is backwards compatible.
7452 if (zap_contains(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
7453 DMU_POOL_CHECKSUM_SALT
) == ENOENT
) {
7454 VERIFY0(zap_add(spa
->spa_meta_objset
,
7455 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CHECKSUM_SALT
, 1,
7456 sizeof (spa
->spa_cksum_salt
.zcs_bytes
),
7457 spa
->spa_cksum_salt
.zcs_bytes
, tx
));
7460 rrw_exit(&dp
->dp_config_rwlock
, FTAG
);
7464 vdev_indirect_state_sync_verify(vdev_t
*vd
)
7466 vdev_indirect_mapping_t
*vim
= vd
->vdev_indirect_mapping
;
7467 vdev_indirect_births_t
*vib
= vd
->vdev_indirect_births
;
7469 if (vd
->vdev_ops
== &vdev_indirect_ops
) {
7470 ASSERT(vim
!= NULL
);
7471 ASSERT(vib
!= NULL
);
7474 if (vdev_obsolete_sm_object(vd
) != 0) {
7475 ASSERT(vd
->vdev_obsolete_sm
!= NULL
);
7476 ASSERT(vd
->vdev_removing
||
7477 vd
->vdev_ops
== &vdev_indirect_ops
);
7478 ASSERT(vdev_indirect_mapping_num_entries(vim
) > 0);
7479 ASSERT(vdev_indirect_mapping_bytes_mapped(vim
) > 0);
7481 ASSERT3U(vdev_obsolete_sm_object(vd
), ==,
7482 space_map_object(vd
->vdev_obsolete_sm
));
7483 ASSERT3U(vdev_indirect_mapping_bytes_mapped(vim
), >=,
7484 space_map_allocated(vd
->vdev_obsolete_sm
));
7486 ASSERT(vd
->vdev_obsolete_segments
!= NULL
);
7489 * Since frees / remaps to an indirect vdev can only
7490 * happen in syncing context, the obsolete segments
7491 * tree must be empty when we start syncing.
7493 ASSERT0(range_tree_space(vd
->vdev_obsolete_segments
));
7497 * Sync the specified transaction group. New blocks may be dirtied as
7498 * part of the process, so we iterate until it converges.
7501 spa_sync(spa_t
*spa
, uint64_t txg
)
7503 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
7504 objset_t
*mos
= spa
->spa_meta_objset
;
7505 bplist_t
*free_bpl
= &spa
->spa_free_bplist
[txg
& TXG_MASK
];
7506 vdev_t
*rvd
= spa
->spa_root_vdev
;
7510 uint32_t max_queue_depth
= zfs_vdev_async_write_max_active
*
7511 zfs_vdev_queue_depth_pct
/ 100;
7513 VERIFY(spa_writeable(spa
));
7516 * Wait for i/os issued in open context that need to complete
7517 * before this txg syncs.
7519 (void) zio_wait(spa
->spa_txg_zio
[txg
& TXG_MASK
]);
7520 spa
->spa_txg_zio
[txg
& TXG_MASK
] = zio_root(spa
, NULL
, NULL
,
7524 * Lock out configuration changes.
7526 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
7528 spa
->spa_syncing_txg
= txg
;
7529 spa
->spa_sync_pass
= 0;
7531 for (int i
= 0; i
< spa
->spa_alloc_count
; i
++) {
7532 mutex_enter(&spa
->spa_alloc_locks
[i
]);
7533 VERIFY0(avl_numnodes(&spa
->spa_alloc_trees
[i
]));
7534 mutex_exit(&spa
->spa_alloc_locks
[i
]);
7538 * If there are any pending vdev state changes, convert them
7539 * into config changes that go out with this transaction group.
7541 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
7542 while (list_head(&spa
->spa_state_dirty_list
) != NULL
) {
7544 * We need the write lock here because, for aux vdevs,
7545 * calling vdev_config_dirty() modifies sav_config.
7546 * This is ugly and will become unnecessary when we
7547 * eliminate the aux vdev wart by integrating all vdevs
7548 * into the root vdev tree.
7550 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
7551 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_WRITER
);
7552 while ((vd
= list_head(&spa
->spa_state_dirty_list
)) != NULL
) {
7553 vdev_state_clean(vd
);
7554 vdev_config_dirty(vd
);
7556 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
7557 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_READER
);
7559 spa_config_exit(spa
, SCL_STATE
, FTAG
);
7561 tx
= dmu_tx_create_assigned(dp
, txg
);
7563 spa
->spa_sync_starttime
= gethrtime();
7564 VERIFY(cyclic_reprogram(spa
->spa_deadman_cycid
,
7565 spa
->spa_sync_starttime
+ spa
->spa_deadman_synctime
));
7568 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
7569 * set spa_deflate if we have no raid-z vdevs.
7571 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_RAIDZ_DEFLATE
&&
7572 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
7575 for (i
= 0; i
< rvd
->vdev_children
; i
++) {
7576 vd
= rvd
->vdev_child
[i
];
7577 if (vd
->vdev_deflate_ratio
!= SPA_MINBLOCKSIZE
)
7580 if (i
== rvd
->vdev_children
) {
7581 spa
->spa_deflate
= TRUE
;
7582 VERIFY(0 == zap_add(spa
->spa_meta_objset
,
7583 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
7584 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
));
7589 * Set the top-level vdev's max queue depth. Evaluate each
7590 * top-level's async write queue depth in case it changed.
7591 * The max queue depth will not change in the middle of syncing
7594 uint64_t slots_per_allocator
= 0;
7595 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
7596 vdev_t
*tvd
= rvd
->vdev_child
[c
];
7597 metaslab_group_t
*mg
= tvd
->vdev_mg
;
7599 if (mg
== NULL
|| mg
->mg_class
!= spa_normal_class(spa
) ||
7600 !metaslab_group_initialized(mg
))
7604 * It is safe to do a lock-free check here because only async
7605 * allocations look at mg_max_alloc_queue_depth, and async
7606 * allocations all happen from spa_sync().
7608 for (int i
= 0; i
< spa
->spa_alloc_count
; i
++)
7609 ASSERT0(refcount_count(&(mg
->mg_alloc_queue_depth
[i
])));
7610 mg
->mg_max_alloc_queue_depth
= max_queue_depth
;
7612 for (int i
= 0; i
< spa
->spa_alloc_count
; i
++) {
7613 mg
->mg_cur_max_alloc_queue_depth
[i
] =
7614 zfs_vdev_def_queue_depth
;
7616 slots_per_allocator
+= zfs_vdev_def_queue_depth
;
7618 metaslab_class_t
*mc
= spa_normal_class(spa
);
7619 for (int i
= 0; i
< spa
->spa_alloc_count
; i
++) {
7620 ASSERT0(refcount_count(&mc
->mc_alloc_slots
[i
]));
7621 mc
->mc_alloc_max_slots
[i
] = slots_per_allocator
;
7623 mc
->mc_alloc_throttle_enabled
= zio_dva_throttle_enabled
;
7625 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
7626 vdev_t
*vd
= rvd
->vdev_child
[c
];
7627 vdev_indirect_state_sync_verify(vd
);
7629 if (vdev_indirect_should_condense(vd
)) {
7630 spa_condense_indirect_start_sync(vd
, tx
);
7636 * Iterate to convergence.
7639 int pass
= ++spa
->spa_sync_pass
;
7641 spa_sync_config_object(spa
, tx
);
7642 spa_sync_aux_dev(spa
, &spa
->spa_spares
, tx
,
7643 ZPOOL_CONFIG_SPARES
, DMU_POOL_SPARES
);
7644 spa_sync_aux_dev(spa
, &spa
->spa_l2cache
, tx
,
7645 ZPOOL_CONFIG_L2CACHE
, DMU_POOL_L2CACHE
);
7646 spa_errlog_sync(spa
, txg
);
7647 dsl_pool_sync(dp
, txg
);
7649 if (pass
< zfs_sync_pass_deferred_free
) {
7650 spa_sync_frees(spa
, free_bpl
, tx
);
7653 * We can not defer frees in pass 1, because
7654 * we sync the deferred frees later in pass 1.
7656 ASSERT3U(pass
, >, 1);
7657 bplist_iterate(free_bpl
, bpobj_enqueue_cb
,
7658 &spa
->spa_deferred_bpobj
, tx
);
7662 dsl_scan_sync(dp
, tx
);
7664 if (spa
->spa_vdev_removal
!= NULL
)
7667 while ((vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, txg
))
7672 spa_sync_upgrades(spa
, tx
);
7674 spa
->spa_uberblock
.ub_rootbp
.blk_birth
);
7676 * Note: We need to check if the MOS is dirty
7677 * because we could have marked the MOS dirty
7678 * without updating the uberblock (e.g. if we
7679 * have sync tasks but no dirty user data). We
7680 * need to check the uberblock's rootbp because
7681 * it is updated if we have synced out dirty
7682 * data (though in this case the MOS will most
7683 * likely also be dirty due to second order
7684 * effects, we don't want to rely on that here).
7686 if (spa
->spa_uberblock
.ub_rootbp
.blk_birth
< txg
&&
7687 !dmu_objset_is_dirty(mos
, txg
)) {
7689 * Nothing changed on the first pass,
7690 * therefore this TXG is a no-op. Avoid
7691 * syncing deferred frees, so that we
7692 * can keep this TXG as a no-op.
7694 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
,
7696 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
7697 ASSERT(txg_list_empty(&dp
->dp_sync_tasks
, txg
));
7698 ASSERT(txg_list_empty(&dp
->dp_early_sync_tasks
,
7702 spa_sync_deferred_frees(spa
, tx
);
7705 } while (dmu_objset_is_dirty(mos
, txg
));
7707 if (!list_is_empty(&spa
->spa_config_dirty_list
)) {
7709 * Make sure that the number of ZAPs for all the vdevs matches
7710 * the number of ZAPs in the per-vdev ZAP list. This only gets
7711 * called if the config is dirty; otherwise there may be
7712 * outstanding AVZ operations that weren't completed in
7713 * spa_sync_config_object.
7715 uint64_t all_vdev_zap_entry_count
;
7716 ASSERT0(zap_count(spa
->spa_meta_objset
,
7717 spa
->spa_all_vdev_zaps
, &all_vdev_zap_entry_count
));
7718 ASSERT3U(vdev_count_verify_zaps(spa
->spa_root_vdev
), ==,
7719 all_vdev_zap_entry_count
);
7722 if (spa
->spa_vdev_removal
!= NULL
) {
7723 ASSERT0(spa
->spa_vdev_removal
->svr_bytes_done
[txg
& TXG_MASK
]);
7727 * Rewrite the vdev configuration (which includes the uberblock)
7728 * to commit the transaction group.
7730 * If there are no dirty vdevs, we sync the uberblock to a few
7731 * random top-level vdevs that are known to be visible in the
7732 * config cache (see spa_vdev_add() for a complete description).
7733 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
7737 * We hold SCL_STATE to prevent vdev open/close/etc.
7738 * while we're attempting to write the vdev labels.
7740 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
7742 if (list_is_empty(&spa
->spa_config_dirty_list
)) {
7743 vdev_t
*svd
[SPA_SYNC_MIN_VDEVS
] = { NULL
};
7745 int children
= rvd
->vdev_children
;
7746 int c0
= spa_get_random(children
);
7748 for (int c
= 0; c
< children
; c
++) {
7749 vd
= rvd
->vdev_child
[(c0
+ c
) % children
];
7751 /* Stop when revisiting the first vdev */
7752 if (c
> 0 && svd
[0] == vd
)
7755 if (vd
->vdev_ms_array
== 0 || vd
->vdev_islog
||
7756 !vdev_is_concrete(vd
))
7759 svd
[svdcount
++] = vd
;
7760 if (svdcount
== SPA_SYNC_MIN_VDEVS
)
7763 error
= vdev_config_sync(svd
, svdcount
, txg
);
7765 error
= vdev_config_sync(rvd
->vdev_child
,
7766 rvd
->vdev_children
, txg
);
7770 spa
->spa_last_synced_guid
= rvd
->vdev_guid
;
7772 spa_config_exit(spa
, SCL_STATE
, FTAG
);
7776 zio_suspend(spa
, NULL
);
7777 zio_resume_wait(spa
);
7781 VERIFY(cyclic_reprogram(spa
->spa_deadman_cycid
, CY_INFINITY
));
7784 * Clear the dirty config list.
7786 while ((vd
= list_head(&spa
->spa_config_dirty_list
)) != NULL
)
7787 vdev_config_clean(vd
);
7790 * Now that the new config has synced transactionally,
7791 * let it become visible to the config cache.
7793 if (spa
->spa_config_syncing
!= NULL
) {
7794 spa_config_set(spa
, spa
->spa_config_syncing
);
7795 spa
->spa_config_txg
= txg
;
7796 spa
->spa_config_syncing
= NULL
;
7799 dsl_pool_sync_done(dp
, txg
);
7801 for (int i
= 0; i
< spa
->spa_alloc_count
; i
++) {
7802 mutex_enter(&spa
->spa_alloc_locks
[i
]);
7803 VERIFY0(avl_numnodes(&spa
->spa_alloc_trees
[i
]));
7804 mutex_exit(&spa
->spa_alloc_locks
[i
]);
7808 * Update usable space statistics.
7810 while ((vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, TXG_CLEAN(txg
)))
7812 vdev_sync_done(vd
, txg
);
7814 spa_update_dspace(spa
);
7817 * It had better be the case that we didn't dirty anything
7818 * since vdev_config_sync().
7820 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
, txg
));
7821 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
7822 ASSERT(txg_list_empty(&spa
->spa_vdev_txg_list
, txg
));
7824 while (zfs_pause_spa_sync
)
7827 spa
->spa_sync_pass
= 0;
7830 * Update the last synced uberblock here. We want to do this at
7831 * the end of spa_sync() so that consumers of spa_last_synced_txg()
7832 * will be guaranteed that all the processing associated with
7833 * that txg has been completed.
7835 spa
->spa_ubsync
= spa
->spa_uberblock
;
7836 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
7838 spa_handle_ignored_writes(spa
);
7841 * If any async tasks have been requested, kick them off.
7843 spa_async_dispatch(spa
);
7847 * Sync all pools. We don't want to hold the namespace lock across these
7848 * operations, so we take a reference on the spa_t and drop the lock during the
7852 spa_sync_allpools(void)
7855 mutex_enter(&spa_namespace_lock
);
7856 while ((spa
= spa_next(spa
)) != NULL
) {
7857 if (spa_state(spa
) != POOL_STATE_ACTIVE
||
7858 !spa_writeable(spa
) || spa_suspended(spa
))
7860 spa_open_ref(spa
, FTAG
);
7861 mutex_exit(&spa_namespace_lock
);
7862 txg_wait_synced(spa_get_dsl(spa
), 0);
7863 mutex_enter(&spa_namespace_lock
);
7864 spa_close(spa
, FTAG
);
7866 mutex_exit(&spa_namespace_lock
);
7870 * ==========================================================================
7871 * Miscellaneous routines
7872 * ==========================================================================
7876 * Remove all pools in the system.
7884 * Remove all cached state. All pools should be closed now,
7885 * so every spa in the AVL tree should be unreferenced.
7887 mutex_enter(&spa_namespace_lock
);
7888 while ((spa
= spa_next(NULL
)) != NULL
) {
7890 * Stop async tasks. The async thread may need to detach
7891 * a device that's been replaced, which requires grabbing
7892 * spa_namespace_lock, so we must drop it here.
7894 spa_open_ref(spa
, FTAG
);
7895 mutex_exit(&spa_namespace_lock
);
7896 spa_async_suspend(spa
);
7897 mutex_enter(&spa_namespace_lock
);
7898 spa_close(spa
, FTAG
);
7900 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
7902 spa_deactivate(spa
);
7906 mutex_exit(&spa_namespace_lock
);
7910 spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
, boolean_t aux
)
7915 if ((vd
= vdev_lookup_by_guid(spa
->spa_root_vdev
, guid
)) != NULL
)
7919 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
7920 vd
= spa
->spa_l2cache
.sav_vdevs
[i
];
7921 if (vd
->vdev_guid
== guid
)
7925 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
7926 vd
= spa
->spa_spares
.sav_vdevs
[i
];
7927 if (vd
->vdev_guid
== guid
)
7936 spa_upgrade(spa_t
*spa
, uint64_t version
)
7938 ASSERT(spa_writeable(spa
));
7940 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
7943 * This should only be called for a non-faulted pool, and since a
7944 * future version would result in an unopenable pool, this shouldn't be
7947 ASSERT(SPA_VERSION_IS_SUPPORTED(spa
->spa_uberblock
.ub_version
));
7948 ASSERT3U(version
, >=, spa
->spa_uberblock
.ub_version
);
7950 spa
->spa_uberblock
.ub_version
= version
;
7951 vdev_config_dirty(spa
->spa_root_vdev
);
7953 spa_config_exit(spa
, SCL_ALL
, FTAG
);
7955 txg_wait_synced(spa_get_dsl(spa
), 0);
7959 spa_has_spare(spa_t
*spa
, uint64_t guid
)
7963 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
7965 for (i
= 0; i
< sav
->sav_count
; i
++)
7966 if (sav
->sav_vdevs
[i
]->vdev_guid
== guid
)
7969 for (i
= 0; i
< sav
->sav_npending
; i
++) {
7970 if (nvlist_lookup_uint64(sav
->sav_pending
[i
], ZPOOL_CONFIG_GUID
,
7971 &spareguid
) == 0 && spareguid
== guid
)
7979 * Check if a pool has an active shared spare device.
7980 * Note: reference count of an active spare is 2, as a spare and as a replace
7983 spa_has_active_shared_spare(spa_t
*spa
)
7987 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
7989 for (i
= 0; i
< sav
->sav_count
; i
++) {
7990 if (spa_spare_exists(sav
->sav_vdevs
[i
]->vdev_guid
, &pool
,
7991 &refcnt
) && pool
!= 0ULL && pool
== spa_guid(spa
) &&
8000 spa_event_create(spa_t
*spa
, vdev_t
*vd
, nvlist_t
*hist_nvl
, const char *name
)
8002 sysevent_t
*ev
= NULL
;
8004 sysevent_attr_list_t
*attr
= NULL
;
8005 sysevent_value_t value
;
8007 ev
= sysevent_alloc(EC_ZFS
, (char *)name
, SUNW_KERN_PUB
"zfs",
8011 value
.value_type
= SE_DATA_TYPE_STRING
;
8012 value
.value
.sv_string
= spa_name(spa
);
8013 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_NAME
, &value
, SE_SLEEP
) != 0)
8016 value
.value_type
= SE_DATA_TYPE_UINT64
;
8017 value
.value
.sv_uint64
= spa_guid(spa
);
8018 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_GUID
, &value
, SE_SLEEP
) != 0)
8022 value
.value_type
= SE_DATA_TYPE_UINT64
;
8023 value
.value
.sv_uint64
= vd
->vdev_guid
;
8024 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_GUID
, &value
,
8028 if (vd
->vdev_path
) {
8029 value
.value_type
= SE_DATA_TYPE_STRING
;
8030 value
.value
.sv_string
= vd
->vdev_path
;
8031 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_PATH
,
8032 &value
, SE_SLEEP
) != 0)
8037 if (hist_nvl
!= NULL
) {
8038 fnvlist_merge((nvlist_t
*)attr
, hist_nvl
);
8041 if (sysevent_attach_attributes(ev
, attr
) != 0)
8047 sysevent_free_attr(attr
);
8054 spa_event_post(sysevent_t
*ev
)
8059 (void) log_sysevent(ev
, SE_SLEEP
, &eid
);
8065 spa_event_discard(sysevent_t
*ev
)
8073 * Post a sysevent corresponding to the given event. The 'name' must be one of
8074 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
8075 * filled in from the spa and (optionally) the vdev and history nvl. This
8076 * doesn't do anything in the userland libzpool, as we don't want consumers to
8077 * misinterpret ztest or zdb as real changes.
8080 spa_event_notify(spa_t
*spa
, vdev_t
*vd
, nvlist_t
*hist_nvl
, const char *name
)
8082 spa_event_post(spa_event_create(spa
, vd
, hist_nvl
, name
));