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, 2017 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.
34 * SPA: Storage Pool Allocator
36 * This file contains all the routines used when modifying on-disk SPA state.
37 * This includes opening, importing, destroying, exporting a pool, and syncing a
41 #include <sys/zfs_context.h>
42 #include <sys/fm/fs/zfs.h>
43 #include <sys/spa_impl.h>
45 #include <sys/zio_checksum.h>
47 #include <sys/dmu_tx.h>
51 #include <sys/vdev_impl.h>
52 #include <sys/metaslab.h>
53 #include <sys/metaslab_impl.h>
54 #include <sys/uberblock_impl.h>
57 #include <sys/dmu_traverse.h>
58 #include <sys/dmu_objset.h>
59 #include <sys/unique.h>
60 #include <sys/dsl_pool.h>
61 #include <sys/dsl_dataset.h>
62 #include <sys/dsl_dir.h>
63 #include <sys/dsl_prop.h>
64 #include <sys/dsl_synctask.h>
65 #include <sys/fs/zfs.h>
67 #include <sys/callb.h>
68 #include <sys/systeminfo.h>
69 #include <sys/spa_boot.h>
70 #include <sys/zfs_ioctl.h>
71 #include <sys/dsl_scan.h>
72 #include <sys/zfeature.h>
73 #include <sys/dsl_destroy.h>
77 #include <sys/bootprops.h>
78 #include <sys/callb.h>
79 #include <sys/cpupart.h>
81 #include <sys/sysdc.h>
86 #include "zfs_comutil.h"
89 * The interval, in seconds, at which failed configuration cache file writes
92 static int zfs_ccw_retry_interval
= 300;
94 typedef enum zti_modes
{
95 ZTI_MODE_FIXED
, /* value is # of threads (min 1) */
96 ZTI_MODE_BATCH
, /* cpu-intensive; value is ignored */
97 ZTI_MODE_NULL
, /* don't create a taskq */
101 #define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) }
102 #define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 }
103 #define ZTI_NULL { ZTI_MODE_NULL, 0, 0 }
105 #define ZTI_N(n) ZTI_P(n, 1)
106 #define ZTI_ONE ZTI_N(1)
108 typedef struct zio_taskq_info
{
109 zti_modes_t zti_mode
;
114 static const char *const zio_taskq_types
[ZIO_TASKQ_TYPES
] = {
115 "issue", "issue_high", "intr", "intr_high"
119 * This table defines the taskq settings for each ZFS I/O type. When
120 * initializing a pool, we use this table to create an appropriately sized
121 * taskq. Some operations are low volume and therefore have a small, static
122 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE
123 * macros. Other operations process a large amount of data; the ZTI_BATCH
124 * macro causes us to create a taskq oriented for throughput. Some operations
125 * are so high frequency and short-lived that the taskq itself can become a a
126 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an
127 * additional degree of parallelism specified by the number of threads per-
128 * taskq and the number of taskqs; when dispatching an event in this case, the
129 * particular taskq is chosen at random.
131 * The different taskq priorities are to handle the different contexts (issue
132 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that
133 * need to be handled with minimum delay.
135 const zio_taskq_info_t zio_taskqs
[ZIO_TYPES
][ZIO_TASKQ_TYPES
] = {
136 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */
137 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* NULL */
138 { ZTI_N(8), ZTI_NULL
, ZTI_P(12, 8), ZTI_NULL
}, /* READ */
139 { ZTI_BATCH
, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */
140 { ZTI_P(12, 8), ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* FREE */
141 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* CLAIM */
142 { ZTI_ONE
, ZTI_NULL
, ZTI_ONE
, ZTI_NULL
}, /* IOCTL */
145 static sysevent_t
*spa_event_create(spa_t
*spa
, vdev_t
*vd
, nvlist_t
*hist_nvl
,
147 static void spa_event_post(sysevent_t
*ev
);
148 static void spa_sync_version(void *arg
, dmu_tx_t
*tx
);
149 static void spa_sync_props(void *arg
, dmu_tx_t
*tx
);
150 static boolean_t
spa_has_active_shared_spare(spa_t
*spa
);
151 static int spa_load_impl(spa_t
*spa
, uint64_t, nvlist_t
*config
,
152 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
154 static void spa_vdev_resilver_done(spa_t
*spa
);
156 uint_t zio_taskq_batch_pct
= 75; /* 1 thread per cpu in pset */
157 id_t zio_taskq_psrset_bind
= PS_NONE
;
158 boolean_t zio_taskq_sysdc
= B_TRUE
; /* use SDC scheduling class */
159 uint_t zio_taskq_basedc
= 80; /* base duty cycle */
161 boolean_t spa_create_process
= B_TRUE
; /* no process ==> no sysdc */
162 extern int zfs_sync_pass_deferred_free
;
165 * This (illegal) pool name is used when temporarily importing a spa_t in order
166 * to get the vdev stats associated with the imported devices.
168 #define TRYIMPORT_NAME "$import"
171 * ==========================================================================
172 * SPA properties routines
173 * ==========================================================================
177 * Add a (source=src, propname=propval) list to an nvlist.
180 spa_prop_add_list(nvlist_t
*nvl
, zpool_prop_t prop
, char *strval
,
181 uint64_t intval
, zprop_source_t src
)
183 const char *propname
= zpool_prop_to_name(prop
);
186 VERIFY(nvlist_alloc(&propval
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
187 VERIFY(nvlist_add_uint64(propval
, ZPROP_SOURCE
, src
) == 0);
190 VERIFY(nvlist_add_string(propval
, ZPROP_VALUE
, strval
) == 0);
192 VERIFY(nvlist_add_uint64(propval
, ZPROP_VALUE
, intval
) == 0);
194 VERIFY(nvlist_add_nvlist(nvl
, propname
, propval
) == 0);
195 nvlist_free(propval
);
199 * Get property values from the spa configuration.
202 spa_prop_get_config(spa_t
*spa
, nvlist_t
**nvp
)
204 vdev_t
*rvd
= spa
->spa_root_vdev
;
205 dsl_pool_t
*pool
= spa
->spa_dsl_pool
;
206 uint64_t size
, alloc
, cap
, version
;
207 zprop_source_t src
= ZPROP_SRC_NONE
;
208 spa_config_dirent_t
*dp
;
209 metaslab_class_t
*mc
= spa_normal_class(spa
);
211 ASSERT(MUTEX_HELD(&spa
->spa_props_lock
));
214 alloc
= metaslab_class_get_alloc(spa_normal_class(spa
));
215 size
= metaslab_class_get_space(spa_normal_class(spa
));
216 spa_prop_add_list(*nvp
, ZPOOL_PROP_NAME
, spa_name(spa
), 0, src
);
217 spa_prop_add_list(*nvp
, ZPOOL_PROP_SIZE
, NULL
, size
, src
);
218 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALLOCATED
, NULL
, alloc
, src
);
219 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREE
, NULL
,
222 spa_prop_add_list(*nvp
, ZPOOL_PROP_FRAGMENTATION
, NULL
,
223 metaslab_class_fragmentation(mc
), src
);
224 spa_prop_add_list(*nvp
, ZPOOL_PROP_EXPANDSZ
, NULL
,
225 metaslab_class_expandable_space(mc
), src
);
226 spa_prop_add_list(*nvp
, ZPOOL_PROP_READONLY
, NULL
,
227 (spa_mode(spa
) == FREAD
), src
);
229 cap
= (size
== 0) ? 0 : (alloc
* 100 / size
);
230 spa_prop_add_list(*nvp
, ZPOOL_PROP_CAPACITY
, NULL
, cap
, src
);
232 spa_prop_add_list(*nvp
, ZPOOL_PROP_DEDUPRATIO
, NULL
,
233 ddt_get_pool_dedup_ratio(spa
), src
);
235 spa_prop_add_list(*nvp
, ZPOOL_PROP_HEALTH
, NULL
,
236 rvd
->vdev_state
, src
);
238 version
= spa_version(spa
);
239 if (version
== zpool_prop_default_numeric(ZPOOL_PROP_VERSION
))
240 src
= ZPROP_SRC_DEFAULT
;
242 src
= ZPROP_SRC_LOCAL
;
243 spa_prop_add_list(*nvp
, ZPOOL_PROP_VERSION
, NULL
, version
, src
);
248 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS,
249 * when opening pools before this version freedir will be NULL.
251 if (pool
->dp_free_dir
!= NULL
) {
252 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREEING
, NULL
,
253 dsl_dir_phys(pool
->dp_free_dir
)->dd_used_bytes
,
256 spa_prop_add_list(*nvp
, ZPOOL_PROP_FREEING
,
260 if (pool
->dp_leak_dir
!= NULL
) {
261 spa_prop_add_list(*nvp
, ZPOOL_PROP_LEAKED
, NULL
,
262 dsl_dir_phys(pool
->dp_leak_dir
)->dd_used_bytes
,
265 spa_prop_add_list(*nvp
, ZPOOL_PROP_LEAKED
,
270 spa_prop_add_list(*nvp
, ZPOOL_PROP_GUID
, NULL
, spa_guid(spa
), src
);
272 if (spa
->spa_comment
!= NULL
) {
273 spa_prop_add_list(*nvp
, ZPOOL_PROP_COMMENT
, spa
->spa_comment
,
277 if (spa
->spa_root
!= NULL
)
278 spa_prop_add_list(*nvp
, ZPOOL_PROP_ALTROOT
, spa
->spa_root
,
281 if (spa_feature_is_enabled(spa
, SPA_FEATURE_LARGE_BLOCKS
)) {
282 spa_prop_add_list(*nvp
, ZPOOL_PROP_MAXBLOCKSIZE
, NULL
,
283 MIN(zfs_max_recordsize
, SPA_MAXBLOCKSIZE
), ZPROP_SRC_NONE
);
285 spa_prop_add_list(*nvp
, ZPOOL_PROP_MAXBLOCKSIZE
, NULL
,
286 SPA_OLD_MAXBLOCKSIZE
, ZPROP_SRC_NONE
);
289 if ((dp
= list_head(&spa
->spa_config_list
)) != NULL
) {
290 if (dp
->scd_path
== NULL
) {
291 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
292 "none", 0, ZPROP_SRC_LOCAL
);
293 } else if (strcmp(dp
->scd_path
, spa_config_path
) != 0) {
294 spa_prop_add_list(*nvp
, ZPOOL_PROP_CACHEFILE
,
295 dp
->scd_path
, 0, ZPROP_SRC_LOCAL
);
301 * Get zpool property values.
304 spa_prop_get(spa_t
*spa
, nvlist_t
**nvp
)
306 objset_t
*mos
= spa
->spa_meta_objset
;
311 VERIFY(nvlist_alloc(nvp
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
313 mutex_enter(&spa
->spa_props_lock
);
316 * Get properties from the spa config.
318 spa_prop_get_config(spa
, nvp
);
320 /* If no pool property object, no more prop to get. */
321 if (mos
== NULL
|| spa
->spa_pool_props_object
== 0) {
322 mutex_exit(&spa
->spa_props_lock
);
327 * Get properties from the MOS pool property object.
329 for (zap_cursor_init(&zc
, mos
, spa
->spa_pool_props_object
);
330 (err
= zap_cursor_retrieve(&zc
, &za
)) == 0;
331 zap_cursor_advance(&zc
)) {
334 zprop_source_t src
= ZPROP_SRC_DEFAULT
;
337 if ((prop
= zpool_name_to_prop(za
.za_name
)) == ZPROP_INVAL
)
340 switch (za
.za_integer_length
) {
342 /* integer property */
343 if (za
.za_first_integer
!=
344 zpool_prop_default_numeric(prop
))
345 src
= ZPROP_SRC_LOCAL
;
347 if (prop
== ZPOOL_PROP_BOOTFS
) {
349 dsl_dataset_t
*ds
= NULL
;
351 dp
= spa_get_dsl(spa
);
352 dsl_pool_config_enter(dp
, FTAG
);
353 if (err
= dsl_dataset_hold_obj(dp
,
354 za
.za_first_integer
, FTAG
, &ds
)) {
355 dsl_pool_config_exit(dp
, FTAG
);
359 strval
= kmem_alloc(ZFS_MAX_DATASET_NAME_LEN
,
361 dsl_dataset_name(ds
, strval
);
362 dsl_dataset_rele(ds
, FTAG
);
363 dsl_pool_config_exit(dp
, FTAG
);
366 intval
= za
.za_first_integer
;
369 spa_prop_add_list(*nvp
, prop
, strval
, intval
, src
);
372 kmem_free(strval
, ZFS_MAX_DATASET_NAME_LEN
);
377 /* string property */
378 strval
= kmem_alloc(za
.za_num_integers
, KM_SLEEP
);
379 err
= zap_lookup(mos
, spa
->spa_pool_props_object
,
380 za
.za_name
, 1, za
.za_num_integers
, strval
);
382 kmem_free(strval
, za
.za_num_integers
);
385 spa_prop_add_list(*nvp
, prop
, strval
, 0, src
);
386 kmem_free(strval
, za
.za_num_integers
);
393 zap_cursor_fini(&zc
);
394 mutex_exit(&spa
->spa_props_lock
);
396 if (err
&& err
!= ENOENT
) {
406 * Validate the given pool properties nvlist and modify the list
407 * for the property values to be set.
410 spa_prop_validate(spa_t
*spa
, nvlist_t
*props
)
413 int error
= 0, reset_bootfs
= 0;
415 boolean_t has_feature
= B_FALSE
;
418 while ((elem
= nvlist_next_nvpair(props
, elem
)) != NULL
) {
420 char *strval
, *slash
, *check
, *fname
;
421 const char *propname
= nvpair_name(elem
);
422 zpool_prop_t prop
= zpool_name_to_prop(propname
);
426 if (!zpool_prop_feature(propname
)) {
427 error
= SET_ERROR(EINVAL
);
432 * Sanitize the input.
434 if (nvpair_type(elem
) != DATA_TYPE_UINT64
) {
435 error
= SET_ERROR(EINVAL
);
439 if (nvpair_value_uint64(elem
, &intval
) != 0) {
440 error
= SET_ERROR(EINVAL
);
445 error
= SET_ERROR(EINVAL
);
449 fname
= strchr(propname
, '@') + 1;
450 if (zfeature_lookup_name(fname
, NULL
) != 0) {
451 error
= SET_ERROR(EINVAL
);
455 has_feature
= B_TRUE
;
458 case ZPOOL_PROP_VERSION
:
459 error
= nvpair_value_uint64(elem
, &intval
);
461 (intval
< spa_version(spa
) ||
462 intval
> SPA_VERSION_BEFORE_FEATURES
||
464 error
= SET_ERROR(EINVAL
);
467 case ZPOOL_PROP_DELEGATION
:
468 case ZPOOL_PROP_AUTOREPLACE
:
469 case ZPOOL_PROP_LISTSNAPS
:
470 case ZPOOL_PROP_AUTOEXPAND
:
471 error
= nvpair_value_uint64(elem
, &intval
);
472 if (!error
&& intval
> 1)
473 error
= SET_ERROR(EINVAL
);
476 case ZPOOL_PROP_BOOTFS
:
478 * If the pool version is less than SPA_VERSION_BOOTFS,
479 * or the pool is still being created (version == 0),
480 * the bootfs property cannot be set.
482 if (spa_version(spa
) < SPA_VERSION_BOOTFS
) {
483 error
= SET_ERROR(ENOTSUP
);
488 * Make sure the vdev config is bootable
490 if (!vdev_is_bootable(spa
->spa_root_vdev
)) {
491 error
= SET_ERROR(ENOTSUP
);
497 error
= nvpair_value_string(elem
, &strval
);
503 if (strval
== NULL
|| strval
[0] == '\0') {
504 objnum
= zpool_prop_default_numeric(
509 if (error
= dmu_objset_hold(strval
, FTAG
, &os
))
513 * Must be ZPL, and its property settings
514 * must be supported by GRUB (compression
515 * is not gzip, and large blocks are not used).
518 if (dmu_objset_type(os
) != DMU_OST_ZFS
) {
519 error
= SET_ERROR(ENOTSUP
);
521 dsl_prop_get_int_ds(dmu_objset_ds(os
),
522 zfs_prop_to_name(ZFS_PROP_COMPRESSION
),
524 !BOOTFS_COMPRESS_VALID(propval
)) {
525 error
= SET_ERROR(ENOTSUP
);
527 objnum
= dmu_objset_id(os
);
529 dmu_objset_rele(os
, FTAG
);
533 case ZPOOL_PROP_FAILUREMODE
:
534 error
= nvpair_value_uint64(elem
, &intval
);
535 if (!error
&& (intval
< ZIO_FAILURE_MODE_WAIT
||
536 intval
> ZIO_FAILURE_MODE_PANIC
))
537 error
= SET_ERROR(EINVAL
);
540 * This is a special case which only occurs when
541 * the pool has completely failed. This allows
542 * the user to change the in-core failmode property
543 * without syncing it out to disk (I/Os might
544 * currently be blocked). We do this by returning
545 * EIO to the caller (spa_prop_set) to trick it
546 * into thinking we encountered a property validation
549 if (!error
&& spa_suspended(spa
)) {
550 spa
->spa_failmode
= intval
;
551 error
= SET_ERROR(EIO
);
555 case ZPOOL_PROP_CACHEFILE
:
556 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
559 if (strval
[0] == '\0')
562 if (strcmp(strval
, "none") == 0)
565 if (strval
[0] != '/') {
566 error
= SET_ERROR(EINVAL
);
570 slash
= strrchr(strval
, '/');
571 ASSERT(slash
!= NULL
);
573 if (slash
[1] == '\0' || strcmp(slash
, "/.") == 0 ||
574 strcmp(slash
, "/..") == 0)
575 error
= SET_ERROR(EINVAL
);
578 case ZPOOL_PROP_COMMENT
:
579 if ((error
= nvpair_value_string(elem
, &strval
)) != 0)
581 for (check
= strval
; *check
!= '\0'; check
++) {
583 * The kernel doesn't have an easy isprint()
584 * check. For this kernel check, we merely
585 * check ASCII apart from DEL. Fix this if
586 * there is an easy-to-use kernel isprint().
588 if (*check
>= 0x7f) {
589 error
= SET_ERROR(EINVAL
);
593 if (strlen(strval
) > ZPROP_MAX_COMMENT
)
597 case ZPOOL_PROP_DEDUPDITTO
:
598 if (spa_version(spa
) < SPA_VERSION_DEDUP
)
599 error
= SET_ERROR(ENOTSUP
);
601 error
= nvpair_value_uint64(elem
, &intval
);
603 intval
!= 0 && intval
< ZIO_DEDUPDITTO_MIN
)
604 error
= SET_ERROR(EINVAL
);
612 if (!error
&& reset_bootfs
) {
613 error
= nvlist_remove(props
,
614 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), DATA_TYPE_STRING
);
617 error
= nvlist_add_uint64(props
,
618 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), objnum
);
626 spa_configfile_set(spa_t
*spa
, nvlist_t
*nvp
, boolean_t need_sync
)
629 spa_config_dirent_t
*dp
;
631 if (nvlist_lookup_string(nvp
, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE
),
635 dp
= kmem_alloc(sizeof (spa_config_dirent_t
),
638 if (cachefile
[0] == '\0')
639 dp
->scd_path
= spa_strdup(spa_config_path
);
640 else if (strcmp(cachefile
, "none") == 0)
643 dp
->scd_path
= spa_strdup(cachefile
);
645 list_insert_head(&spa
->spa_config_list
, dp
);
647 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
651 spa_prop_set(spa_t
*spa
, nvlist_t
*nvp
)
654 nvpair_t
*elem
= NULL
;
655 boolean_t need_sync
= B_FALSE
;
657 if ((error
= spa_prop_validate(spa
, nvp
)) != 0)
660 while ((elem
= nvlist_next_nvpair(nvp
, elem
)) != NULL
) {
661 zpool_prop_t prop
= zpool_name_to_prop(nvpair_name(elem
));
663 if (prop
== ZPOOL_PROP_CACHEFILE
||
664 prop
== ZPOOL_PROP_ALTROOT
||
665 prop
== ZPOOL_PROP_READONLY
)
668 if (prop
== ZPOOL_PROP_VERSION
|| prop
== ZPROP_INVAL
) {
671 if (prop
== ZPOOL_PROP_VERSION
) {
672 VERIFY(nvpair_value_uint64(elem
, &ver
) == 0);
674 ASSERT(zpool_prop_feature(nvpair_name(elem
)));
675 ver
= SPA_VERSION_FEATURES
;
679 /* Save time if the version is already set. */
680 if (ver
== spa_version(spa
))
684 * In addition to the pool directory object, we might
685 * create the pool properties object, the features for
686 * read object, the features for write object, or the
687 * feature descriptions object.
689 error
= dsl_sync_task(spa
->spa_name
, NULL
,
690 spa_sync_version
, &ver
,
691 6, ZFS_SPACE_CHECK_RESERVED
);
702 return (dsl_sync_task(spa
->spa_name
, NULL
, spa_sync_props
,
703 nvp
, 6, ZFS_SPACE_CHECK_RESERVED
));
710 * If the bootfs property value is dsobj, clear it.
713 spa_prop_clear_bootfs(spa_t
*spa
, uint64_t dsobj
, dmu_tx_t
*tx
)
715 if (spa
->spa_bootfs
== dsobj
&& spa
->spa_pool_props_object
!= 0) {
716 VERIFY(zap_remove(spa
->spa_meta_objset
,
717 spa
->spa_pool_props_object
,
718 zpool_prop_to_name(ZPOOL_PROP_BOOTFS
), tx
) == 0);
725 spa_change_guid_check(void *arg
, dmu_tx_t
*tx
)
727 uint64_t *newguid
= arg
;
728 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
729 vdev_t
*rvd
= spa
->spa_root_vdev
;
732 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
733 vdev_state
= rvd
->vdev_state
;
734 spa_config_exit(spa
, SCL_STATE
, FTAG
);
736 if (vdev_state
!= VDEV_STATE_HEALTHY
)
737 return (SET_ERROR(ENXIO
));
739 ASSERT3U(spa_guid(spa
), !=, *newguid
);
745 spa_change_guid_sync(void *arg
, dmu_tx_t
*tx
)
747 uint64_t *newguid
= arg
;
748 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
750 vdev_t
*rvd
= spa
->spa_root_vdev
;
752 oldguid
= spa_guid(spa
);
754 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
755 rvd
->vdev_guid
= *newguid
;
756 rvd
->vdev_guid_sum
+= (*newguid
- oldguid
);
757 vdev_config_dirty(rvd
);
758 spa_config_exit(spa
, SCL_STATE
, FTAG
);
760 spa_history_log_internal(spa
, "guid change", tx
, "old=%llu new=%llu",
765 * Change the GUID for the pool. This is done so that we can later
766 * re-import a pool built from a clone of our own vdevs. We will modify
767 * the root vdev's guid, our own pool guid, and then mark all of our
768 * vdevs dirty. Note that we must make sure that all our vdevs are
769 * online when we do this, or else any vdevs that weren't present
770 * would be orphaned from our pool. We are also going to issue a
771 * sysevent to update any watchers.
774 spa_change_guid(spa_t
*spa
)
779 mutex_enter(&spa
->spa_vdev_top_lock
);
780 mutex_enter(&spa_namespace_lock
);
781 guid
= spa_generate_guid(NULL
);
783 error
= dsl_sync_task(spa
->spa_name
, spa_change_guid_check
,
784 spa_change_guid_sync
, &guid
, 5, ZFS_SPACE_CHECK_RESERVED
);
787 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
788 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_POOL_REGUID
);
791 mutex_exit(&spa_namespace_lock
);
792 mutex_exit(&spa
->spa_vdev_top_lock
);
798 * ==========================================================================
799 * SPA state manipulation (open/create/destroy/import/export)
800 * ==========================================================================
804 spa_error_entry_compare(const void *a
, const void *b
)
806 spa_error_entry_t
*sa
= (spa_error_entry_t
*)a
;
807 spa_error_entry_t
*sb
= (spa_error_entry_t
*)b
;
810 ret
= bcmp(&sa
->se_bookmark
, &sb
->se_bookmark
,
811 sizeof (zbookmark_phys_t
));
822 * Utility function which retrieves copies of the current logs and
823 * re-initializes them in the process.
826 spa_get_errlists(spa_t
*spa
, avl_tree_t
*last
, avl_tree_t
*scrub
)
828 ASSERT(MUTEX_HELD(&spa
->spa_errlist_lock
));
830 bcopy(&spa
->spa_errlist_last
, last
, sizeof (avl_tree_t
));
831 bcopy(&spa
->spa_errlist_scrub
, scrub
, sizeof (avl_tree_t
));
833 avl_create(&spa
->spa_errlist_scrub
,
834 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
835 offsetof(spa_error_entry_t
, se_avl
));
836 avl_create(&spa
->spa_errlist_last
,
837 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
838 offsetof(spa_error_entry_t
, se_avl
));
842 spa_taskqs_init(spa_t
*spa
, zio_type_t t
, zio_taskq_type_t q
)
844 const zio_taskq_info_t
*ztip
= &zio_taskqs
[t
][q
];
845 enum zti_modes mode
= ztip
->zti_mode
;
846 uint_t value
= ztip
->zti_value
;
847 uint_t count
= ztip
->zti_count
;
848 spa_taskqs_t
*tqs
= &spa
->spa_zio_taskq
[t
][q
];
851 boolean_t batch
= B_FALSE
;
853 if (mode
== ZTI_MODE_NULL
) {
855 tqs
->stqs_taskq
= NULL
;
859 ASSERT3U(count
, >, 0);
861 tqs
->stqs_count
= count
;
862 tqs
->stqs_taskq
= kmem_alloc(count
* sizeof (taskq_t
*), KM_SLEEP
);
866 ASSERT3U(value
, >=, 1);
867 value
= MAX(value
, 1);
872 flags
|= TASKQ_THREADS_CPU_PCT
;
873 value
= zio_taskq_batch_pct
;
877 panic("unrecognized mode for %s_%s taskq (%u:%u) in "
879 zio_type_name
[t
], zio_taskq_types
[q
], mode
, value
);
883 for (uint_t i
= 0; i
< count
; i
++) {
887 (void) snprintf(name
, sizeof (name
), "%s_%s_%u",
888 zio_type_name
[t
], zio_taskq_types
[q
], i
);
890 (void) snprintf(name
, sizeof (name
), "%s_%s",
891 zio_type_name
[t
], zio_taskq_types
[q
]);
894 if (zio_taskq_sysdc
&& spa
->spa_proc
!= &p0
) {
896 flags
|= TASKQ_DC_BATCH
;
898 tq
= taskq_create_sysdc(name
, value
, 50, INT_MAX
,
899 spa
->spa_proc
, zio_taskq_basedc
, flags
);
901 pri_t pri
= maxclsyspri
;
903 * The write issue taskq can be extremely CPU
904 * intensive. Run it at slightly lower priority
905 * than the other taskqs.
907 if (t
== ZIO_TYPE_WRITE
&& q
== ZIO_TASKQ_ISSUE
)
910 tq
= taskq_create_proc(name
, value
, pri
, 50,
911 INT_MAX
, spa
->spa_proc
, flags
);
914 tqs
->stqs_taskq
[i
] = tq
;
919 spa_taskqs_fini(spa_t
*spa
, zio_type_t t
, zio_taskq_type_t q
)
921 spa_taskqs_t
*tqs
= &spa
->spa_zio_taskq
[t
][q
];
923 if (tqs
->stqs_taskq
== NULL
) {
924 ASSERT0(tqs
->stqs_count
);
928 for (uint_t i
= 0; i
< tqs
->stqs_count
; i
++) {
929 ASSERT3P(tqs
->stqs_taskq
[i
], !=, NULL
);
930 taskq_destroy(tqs
->stqs_taskq
[i
]);
933 kmem_free(tqs
->stqs_taskq
, tqs
->stqs_count
* sizeof (taskq_t
*));
934 tqs
->stqs_taskq
= NULL
;
938 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority.
939 * Note that a type may have multiple discrete taskqs to avoid lock contention
940 * on the taskq itself. In that case we choose which taskq at random by using
941 * the low bits of gethrtime().
944 spa_taskq_dispatch_ent(spa_t
*spa
, zio_type_t t
, zio_taskq_type_t q
,
945 task_func_t
*func
, void *arg
, uint_t flags
, taskq_ent_t
*ent
)
947 spa_taskqs_t
*tqs
= &spa
->spa_zio_taskq
[t
][q
];
950 ASSERT3P(tqs
->stqs_taskq
, !=, NULL
);
951 ASSERT3U(tqs
->stqs_count
, !=, 0);
953 if (tqs
->stqs_count
== 1) {
954 tq
= tqs
->stqs_taskq
[0];
956 tq
= tqs
->stqs_taskq
[gethrtime() % tqs
->stqs_count
];
959 taskq_dispatch_ent(tq
, func
, arg
, flags
, ent
);
963 spa_create_zio_taskqs(spa_t
*spa
)
965 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
966 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
967 spa_taskqs_init(spa
, t
, q
);
974 spa_thread(void *arg
)
979 user_t
*pu
= PTOU(curproc
);
981 CALLB_CPR_INIT(&cprinfo
, &spa
->spa_proc_lock
, callb_generic_cpr
,
984 ASSERT(curproc
!= &p0
);
985 (void) snprintf(pu
->u_psargs
, sizeof (pu
->u_psargs
),
986 "zpool-%s", spa
->spa_name
);
987 (void) strlcpy(pu
->u_comm
, pu
->u_psargs
, sizeof (pu
->u_comm
));
989 /* bind this thread to the requested psrset */
990 if (zio_taskq_psrset_bind
!= PS_NONE
) {
992 mutex_enter(&cpu_lock
);
993 mutex_enter(&pidlock
);
994 mutex_enter(&curproc
->p_lock
);
996 if (cpupart_bind_thread(curthread
, zio_taskq_psrset_bind
,
997 0, NULL
, NULL
) == 0) {
998 curthread
->t_bind_pset
= zio_taskq_psrset_bind
;
1001 "Couldn't bind process for zfs pool \"%s\" to "
1002 "pset %d\n", spa
->spa_name
, zio_taskq_psrset_bind
);
1005 mutex_exit(&curproc
->p_lock
);
1006 mutex_exit(&pidlock
);
1007 mutex_exit(&cpu_lock
);
1011 if (zio_taskq_sysdc
) {
1012 sysdc_thread_enter(curthread
, 100, 0);
1015 spa
->spa_proc
= curproc
;
1016 spa
->spa_did
= curthread
->t_did
;
1018 spa_create_zio_taskqs(spa
);
1020 mutex_enter(&spa
->spa_proc_lock
);
1021 ASSERT(spa
->spa_proc_state
== SPA_PROC_CREATED
);
1023 spa
->spa_proc_state
= SPA_PROC_ACTIVE
;
1024 cv_broadcast(&spa
->spa_proc_cv
);
1026 CALLB_CPR_SAFE_BEGIN(&cprinfo
);
1027 while (spa
->spa_proc_state
== SPA_PROC_ACTIVE
)
1028 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
1029 CALLB_CPR_SAFE_END(&cprinfo
, &spa
->spa_proc_lock
);
1031 ASSERT(spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
);
1032 spa
->spa_proc_state
= SPA_PROC_GONE
;
1033 spa
->spa_proc
= &p0
;
1034 cv_broadcast(&spa
->spa_proc_cv
);
1035 CALLB_CPR_EXIT(&cprinfo
); /* drops spa_proc_lock */
1037 mutex_enter(&curproc
->p_lock
);
1043 * Activate an uninitialized pool.
1046 spa_activate(spa_t
*spa
, int mode
)
1048 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
1050 spa
->spa_state
= POOL_STATE_ACTIVE
;
1051 spa
->spa_mode
= mode
;
1053 spa
->spa_normal_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
1054 spa
->spa_log_class
= metaslab_class_create(spa
, zfs_metaslab_ops
);
1056 /* Try to create a covering process */
1057 mutex_enter(&spa
->spa_proc_lock
);
1058 ASSERT(spa
->spa_proc_state
== SPA_PROC_NONE
);
1059 ASSERT(spa
->spa_proc
== &p0
);
1062 /* Only create a process if we're going to be around a while. */
1063 if (spa_create_process
&& strcmp(spa
->spa_name
, TRYIMPORT_NAME
) != 0) {
1064 if (newproc(spa_thread
, (caddr_t
)spa
, syscid
, maxclsyspri
,
1066 spa
->spa_proc_state
= SPA_PROC_CREATED
;
1067 while (spa
->spa_proc_state
== SPA_PROC_CREATED
) {
1068 cv_wait(&spa
->spa_proc_cv
,
1069 &spa
->spa_proc_lock
);
1071 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
1072 ASSERT(spa
->spa_proc
!= &p0
);
1073 ASSERT(spa
->spa_did
!= 0);
1077 "Couldn't create process for zfs pool \"%s\"\n",
1082 mutex_exit(&spa
->spa_proc_lock
);
1084 /* If we didn't create a process, we need to create our taskqs. */
1085 if (spa
->spa_proc
== &p0
) {
1086 spa_create_zio_taskqs(spa
);
1089 list_create(&spa
->spa_config_dirty_list
, sizeof (vdev_t
),
1090 offsetof(vdev_t
, vdev_config_dirty_node
));
1091 list_create(&spa
->spa_evicting_os_list
, sizeof (objset_t
),
1092 offsetof(objset_t
, os_evicting_node
));
1093 list_create(&spa
->spa_state_dirty_list
, sizeof (vdev_t
),
1094 offsetof(vdev_t
, vdev_state_dirty_node
));
1096 txg_list_create(&spa
->spa_vdev_txg_list
, spa
,
1097 offsetof(struct vdev
, vdev_txg_node
));
1099 avl_create(&spa
->spa_errlist_scrub
,
1100 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
1101 offsetof(spa_error_entry_t
, se_avl
));
1102 avl_create(&spa
->spa_errlist_last
,
1103 spa_error_entry_compare
, sizeof (spa_error_entry_t
),
1104 offsetof(spa_error_entry_t
, se_avl
));
1108 * Opposite of spa_activate().
1111 spa_deactivate(spa_t
*spa
)
1113 ASSERT(spa
->spa_sync_on
== B_FALSE
);
1114 ASSERT(spa
->spa_dsl_pool
== NULL
);
1115 ASSERT(spa
->spa_root_vdev
== NULL
);
1116 ASSERT(spa
->spa_async_zio_root
== NULL
);
1117 ASSERT(spa
->spa_state
!= POOL_STATE_UNINITIALIZED
);
1119 spa_evicting_os_wait(spa
);
1121 txg_list_destroy(&spa
->spa_vdev_txg_list
);
1123 list_destroy(&spa
->spa_config_dirty_list
);
1124 list_destroy(&spa
->spa_evicting_os_list
);
1125 list_destroy(&spa
->spa_state_dirty_list
);
1127 for (int t
= 0; t
< ZIO_TYPES
; t
++) {
1128 for (int q
= 0; q
< ZIO_TASKQ_TYPES
; q
++) {
1129 spa_taskqs_fini(spa
, t
, q
);
1133 metaslab_class_destroy(spa
->spa_normal_class
);
1134 spa
->spa_normal_class
= NULL
;
1136 metaslab_class_destroy(spa
->spa_log_class
);
1137 spa
->spa_log_class
= NULL
;
1140 * If this was part of an import or the open otherwise failed, we may
1141 * still have errors left in the queues. Empty them just in case.
1143 spa_errlog_drain(spa
);
1145 avl_destroy(&spa
->spa_errlist_scrub
);
1146 avl_destroy(&spa
->spa_errlist_last
);
1148 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
1150 mutex_enter(&spa
->spa_proc_lock
);
1151 if (spa
->spa_proc_state
!= SPA_PROC_NONE
) {
1152 ASSERT(spa
->spa_proc_state
== SPA_PROC_ACTIVE
);
1153 spa
->spa_proc_state
= SPA_PROC_DEACTIVATE
;
1154 cv_broadcast(&spa
->spa_proc_cv
);
1155 while (spa
->spa_proc_state
== SPA_PROC_DEACTIVATE
) {
1156 ASSERT(spa
->spa_proc
!= &p0
);
1157 cv_wait(&spa
->spa_proc_cv
, &spa
->spa_proc_lock
);
1159 ASSERT(spa
->spa_proc_state
== SPA_PROC_GONE
);
1160 spa
->spa_proc_state
= SPA_PROC_NONE
;
1162 ASSERT(spa
->spa_proc
== &p0
);
1163 mutex_exit(&spa
->spa_proc_lock
);
1166 * We want to make sure spa_thread() has actually exited the ZFS
1167 * module, so that the module can't be unloaded out from underneath
1170 if (spa
->spa_did
!= 0) {
1171 thread_join(spa
->spa_did
);
1177 * Verify a pool configuration, and construct the vdev tree appropriately. This
1178 * will create all the necessary vdevs in the appropriate layout, with each vdev
1179 * in the CLOSED state. This will prep the pool before open/creation/import.
1180 * All vdev validation is done by the vdev_alloc() routine.
1183 spa_config_parse(spa_t
*spa
, vdev_t
**vdp
, nvlist_t
*nv
, vdev_t
*parent
,
1184 uint_t id
, int atype
)
1190 if ((error
= vdev_alloc(spa
, vdp
, nv
, parent
, id
, atype
)) != 0)
1193 if ((*vdp
)->vdev_ops
->vdev_op_leaf
)
1196 error
= nvlist_lookup_nvlist_array(nv
, ZPOOL_CONFIG_CHILDREN
,
1199 if (error
== ENOENT
)
1205 return (SET_ERROR(EINVAL
));
1208 for (int c
= 0; c
< children
; c
++) {
1210 if ((error
= spa_config_parse(spa
, &vd
, child
[c
], *vdp
, c
,
1218 ASSERT(*vdp
!= NULL
);
1224 * Opposite of spa_load().
1227 spa_unload(spa_t
*spa
)
1231 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1236 spa_async_suspend(spa
);
1241 if (spa
->spa_sync_on
) {
1242 txg_sync_stop(spa
->spa_dsl_pool
);
1243 spa
->spa_sync_on
= B_FALSE
;
1247 * Even though vdev_free() also calls vdev_metaslab_fini, we need
1248 * to call it earlier, before we wait for async i/o to complete.
1249 * This ensures that there is no async metaslab prefetching, by
1250 * calling taskq_wait(mg_taskq).
1252 if (spa
->spa_root_vdev
!= NULL
) {
1253 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1254 for (int c
= 0; c
< spa
->spa_root_vdev
->vdev_children
; c
++)
1255 vdev_metaslab_fini(spa
->spa_root_vdev
->vdev_child
[c
]);
1256 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1260 * Wait for any outstanding async I/O to complete.
1262 if (spa
->spa_async_zio_root
!= NULL
) {
1263 for (int i
= 0; i
< max_ncpus
; i
++)
1264 (void) zio_wait(spa
->spa_async_zio_root
[i
]);
1265 kmem_free(spa
->spa_async_zio_root
, max_ncpus
* sizeof (void *));
1266 spa
->spa_async_zio_root
= NULL
;
1269 bpobj_close(&spa
->spa_deferred_bpobj
);
1271 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1276 if (spa
->spa_root_vdev
)
1277 vdev_free(spa
->spa_root_vdev
);
1278 ASSERT(spa
->spa_root_vdev
== NULL
);
1281 * Close the dsl pool.
1283 if (spa
->spa_dsl_pool
) {
1284 dsl_pool_close(spa
->spa_dsl_pool
);
1285 spa
->spa_dsl_pool
= NULL
;
1286 spa
->spa_meta_objset
= NULL
;
1292 * Drop and purge level 2 cache
1294 spa_l2cache_drop(spa
);
1296 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1297 vdev_free(spa
->spa_spares
.sav_vdevs
[i
]);
1298 if (spa
->spa_spares
.sav_vdevs
) {
1299 kmem_free(spa
->spa_spares
.sav_vdevs
,
1300 spa
->spa_spares
.sav_count
* sizeof (void *));
1301 spa
->spa_spares
.sav_vdevs
= NULL
;
1303 if (spa
->spa_spares
.sav_config
) {
1304 nvlist_free(spa
->spa_spares
.sav_config
);
1305 spa
->spa_spares
.sav_config
= NULL
;
1307 spa
->spa_spares
.sav_count
= 0;
1309 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
1310 vdev_clear_stats(spa
->spa_l2cache
.sav_vdevs
[i
]);
1311 vdev_free(spa
->spa_l2cache
.sav_vdevs
[i
]);
1313 if (spa
->spa_l2cache
.sav_vdevs
) {
1314 kmem_free(spa
->spa_l2cache
.sav_vdevs
,
1315 spa
->spa_l2cache
.sav_count
* sizeof (void *));
1316 spa
->spa_l2cache
.sav_vdevs
= NULL
;
1318 if (spa
->spa_l2cache
.sav_config
) {
1319 nvlist_free(spa
->spa_l2cache
.sav_config
);
1320 spa
->spa_l2cache
.sav_config
= NULL
;
1322 spa
->spa_l2cache
.sav_count
= 0;
1324 spa
->spa_async_suspended
= 0;
1326 if (spa
->spa_comment
!= NULL
) {
1327 spa_strfree(spa
->spa_comment
);
1328 spa
->spa_comment
= NULL
;
1331 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1335 * Load (or re-load) the current list of vdevs describing the active spares for
1336 * this pool. When this is called, we have some form of basic information in
1337 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and
1338 * then re-generate a more complete list including status information.
1341 spa_load_spares(spa_t
*spa
)
1348 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1351 * First, close and free any existing spare vdevs.
1353 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1354 vd
= spa
->spa_spares
.sav_vdevs
[i
];
1356 /* Undo the call to spa_activate() below */
1357 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1358 B_FALSE
)) != NULL
&& tvd
->vdev_isspare
)
1359 spa_spare_remove(tvd
);
1364 if (spa
->spa_spares
.sav_vdevs
)
1365 kmem_free(spa
->spa_spares
.sav_vdevs
,
1366 spa
->spa_spares
.sav_count
* sizeof (void *));
1368 if (spa
->spa_spares
.sav_config
== NULL
)
1371 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
1372 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
1374 spa
->spa_spares
.sav_count
= (int)nspares
;
1375 spa
->spa_spares
.sav_vdevs
= NULL
;
1381 * Construct the array of vdevs, opening them to get status in the
1382 * process. For each spare, there is potentially two different vdev_t
1383 * structures associated with it: one in the list of spares (used only
1384 * for basic validation purposes) and one in the active vdev
1385 * configuration (if it's spared in). During this phase we open and
1386 * validate each vdev on the spare list. If the vdev also exists in the
1387 * active configuration, then we also mark this vdev as an active spare.
1389 spa
->spa_spares
.sav_vdevs
= kmem_alloc(nspares
* sizeof (void *),
1391 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
1392 VERIFY(spa_config_parse(spa
, &vd
, spares
[i
], NULL
, 0,
1393 VDEV_ALLOC_SPARE
) == 0);
1396 spa
->spa_spares
.sav_vdevs
[i
] = vd
;
1398 if ((tvd
= spa_lookup_by_guid(spa
, vd
->vdev_guid
,
1399 B_FALSE
)) != NULL
) {
1400 if (!tvd
->vdev_isspare
)
1404 * We only mark the spare active if we were successfully
1405 * able to load the vdev. Otherwise, importing a pool
1406 * with a bad active spare would result in strange
1407 * behavior, because multiple pool would think the spare
1408 * is actively in use.
1410 * There is a vulnerability here to an equally bizarre
1411 * circumstance, where a dead active spare is later
1412 * brought back to life (onlined or otherwise). Given
1413 * the rarity of this scenario, and the extra complexity
1414 * it adds, we ignore the possibility.
1416 if (!vdev_is_dead(tvd
))
1417 spa_spare_activate(tvd
);
1421 vd
->vdev_aux
= &spa
->spa_spares
;
1423 if (vdev_open(vd
) != 0)
1426 if (vdev_validate_aux(vd
) == 0)
1431 * Recompute the stashed list of spares, with status information
1434 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
, ZPOOL_CONFIG_SPARES
,
1435 DATA_TYPE_NVLIST_ARRAY
) == 0);
1437 spares
= kmem_alloc(spa
->spa_spares
.sav_count
* sizeof (void *),
1439 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1440 spares
[i
] = vdev_config_generate(spa
,
1441 spa
->spa_spares
.sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_SPARE
);
1442 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
1443 ZPOOL_CONFIG_SPARES
, spares
, spa
->spa_spares
.sav_count
) == 0);
1444 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
1445 nvlist_free(spares
[i
]);
1446 kmem_free(spares
, spa
->spa_spares
.sav_count
* sizeof (void *));
1450 * Load (or re-load) the current list of vdevs describing the active l2cache for
1451 * this pool. When this is called, we have some form of basic information in
1452 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and
1453 * then re-generate a more complete list including status information.
1454 * Devices which are already active have their details maintained, and are
1458 spa_load_l2cache(spa_t
*spa
)
1462 int i
, j
, oldnvdevs
;
1464 vdev_t
*vd
, **oldvdevs
, **newvdevs
;
1465 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
1467 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
1469 if (sav
->sav_config
!= NULL
) {
1470 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
,
1471 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
1472 newvdevs
= kmem_alloc(nl2cache
* sizeof (void *), KM_SLEEP
);
1478 oldvdevs
= sav
->sav_vdevs
;
1479 oldnvdevs
= sav
->sav_count
;
1480 sav
->sav_vdevs
= NULL
;
1484 * Process new nvlist of vdevs.
1486 for (i
= 0; i
< nl2cache
; i
++) {
1487 VERIFY(nvlist_lookup_uint64(l2cache
[i
], ZPOOL_CONFIG_GUID
,
1491 for (j
= 0; j
< oldnvdevs
; j
++) {
1493 if (vd
!= NULL
&& guid
== vd
->vdev_guid
) {
1495 * Retain previous vdev for add/remove ops.
1503 if (newvdevs
[i
] == NULL
) {
1507 VERIFY(spa_config_parse(spa
, &vd
, l2cache
[i
], NULL
, 0,
1508 VDEV_ALLOC_L2CACHE
) == 0);
1513 * Commit this vdev as an l2cache device,
1514 * even if it fails to open.
1516 spa_l2cache_add(vd
);
1521 spa_l2cache_activate(vd
);
1523 if (vdev_open(vd
) != 0)
1526 (void) vdev_validate_aux(vd
);
1528 if (!vdev_is_dead(vd
))
1529 l2arc_add_vdev(spa
, vd
);
1534 * Purge vdevs that were dropped
1536 for (i
= 0; i
< oldnvdevs
; i
++) {
1541 ASSERT(vd
->vdev_isl2cache
);
1543 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
1544 pool
!= 0ULL && l2arc_vdev_present(vd
))
1545 l2arc_remove_vdev(vd
);
1546 vdev_clear_stats(vd
);
1552 kmem_free(oldvdevs
, oldnvdevs
* sizeof (void *));
1554 if (sav
->sav_config
== NULL
)
1557 sav
->sav_vdevs
= newvdevs
;
1558 sav
->sav_count
= (int)nl2cache
;
1561 * Recompute the stashed list of l2cache devices, with status
1562 * information this time.
1564 VERIFY(nvlist_remove(sav
->sav_config
, ZPOOL_CONFIG_L2CACHE
,
1565 DATA_TYPE_NVLIST_ARRAY
) == 0);
1567 l2cache
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
1568 for (i
= 0; i
< sav
->sav_count
; i
++)
1569 l2cache
[i
] = vdev_config_generate(spa
,
1570 sav
->sav_vdevs
[i
], B_TRUE
, VDEV_CONFIG_L2CACHE
);
1571 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
1572 ZPOOL_CONFIG_L2CACHE
, l2cache
, sav
->sav_count
) == 0);
1574 for (i
= 0; i
< sav
->sav_count
; i
++)
1575 nvlist_free(l2cache
[i
]);
1577 kmem_free(l2cache
, sav
->sav_count
* sizeof (void *));
1581 load_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
**value
)
1584 char *packed
= NULL
;
1589 error
= dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
);
1593 nvsize
= *(uint64_t *)db
->db_data
;
1594 dmu_buf_rele(db
, FTAG
);
1596 packed
= kmem_alloc(nvsize
, KM_SLEEP
);
1597 error
= dmu_read(spa
->spa_meta_objset
, obj
, 0, nvsize
, packed
,
1600 error
= nvlist_unpack(packed
, nvsize
, value
, 0);
1601 kmem_free(packed
, nvsize
);
1607 * Checks to see if the given vdev could not be opened, in which case we post a
1608 * sysevent to notify the autoreplace code that the device has been removed.
1611 spa_check_removed(vdev_t
*vd
)
1613 for (int c
= 0; c
< vd
->vdev_children
; c
++)
1614 spa_check_removed(vd
->vdev_child
[c
]);
1616 if (vd
->vdev_ops
->vdev_op_leaf
&& vdev_is_dead(vd
) &&
1618 zfs_post_autoreplace(vd
->vdev_spa
, vd
);
1619 spa_event_notify(vd
->vdev_spa
, vd
, NULL
, ESC_ZFS_VDEV_CHECK
);
1624 spa_config_valid_zaps(vdev_t
*vd
, vdev_t
*mvd
)
1626 ASSERT3U(vd
->vdev_children
, ==, mvd
->vdev_children
);
1628 vd
->vdev_top_zap
= mvd
->vdev_top_zap
;
1629 vd
->vdev_leaf_zap
= mvd
->vdev_leaf_zap
;
1631 for (uint64_t i
= 0; i
< vd
->vdev_children
; i
++) {
1632 spa_config_valid_zaps(vd
->vdev_child
[i
], mvd
->vdev_child
[i
]);
1637 * Validate the current config against the MOS config
1640 spa_config_valid(spa_t
*spa
, nvlist_t
*config
)
1642 vdev_t
*mrvd
, *rvd
= spa
->spa_root_vdev
;
1645 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nv
) == 0);
1647 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1648 VERIFY(spa_config_parse(spa
, &mrvd
, nv
, NULL
, 0, VDEV_ALLOC_LOAD
) == 0);
1650 ASSERT3U(rvd
->vdev_children
, ==, mrvd
->vdev_children
);
1653 * If we're doing a normal import, then build up any additional
1654 * diagnostic information about missing devices in this config.
1655 * We'll pass this up to the user for further processing.
1657 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
)) {
1658 nvlist_t
**child
, *nv
;
1661 child
= kmem_alloc(rvd
->vdev_children
* sizeof (nvlist_t
**),
1663 VERIFY(nvlist_alloc(&nv
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
1665 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1666 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1667 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1669 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1670 mtvd
->vdev_ops
!= &vdev_missing_ops
&&
1672 child
[idx
++] = vdev_config_generate(spa
, mtvd
,
1677 VERIFY(nvlist_add_nvlist_array(nv
,
1678 ZPOOL_CONFIG_CHILDREN
, child
, idx
) == 0);
1679 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
1680 ZPOOL_CONFIG_MISSING_DEVICES
, nv
) == 0);
1682 for (int i
= 0; i
< idx
; i
++)
1683 nvlist_free(child
[i
]);
1686 kmem_free(child
, rvd
->vdev_children
* sizeof (char **));
1690 * Compare the root vdev tree with the information we have
1691 * from the MOS config (mrvd). Check each top-level vdev
1692 * with the corresponding MOS config top-level (mtvd).
1694 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1695 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1696 vdev_t
*mtvd
= mrvd
->vdev_child
[c
];
1699 * Resolve any "missing" vdevs in the current configuration.
1700 * If we find that the MOS config has more accurate information
1701 * about the top-level vdev then use that vdev instead.
1703 if (tvd
->vdev_ops
== &vdev_missing_ops
&&
1704 mtvd
->vdev_ops
!= &vdev_missing_ops
) {
1706 if (!(spa
->spa_import_flags
& ZFS_IMPORT_MISSING_LOG
))
1710 * Device specific actions.
1712 if (mtvd
->vdev_islog
) {
1713 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
1716 * XXX - once we have 'readonly' pool
1717 * support we should be able to handle
1718 * missing data devices by transitioning
1719 * the pool to readonly.
1725 * Swap the missing vdev with the data we were
1726 * able to obtain from the MOS config.
1728 vdev_remove_child(rvd
, tvd
);
1729 vdev_remove_child(mrvd
, mtvd
);
1731 vdev_add_child(rvd
, mtvd
);
1732 vdev_add_child(mrvd
, tvd
);
1734 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1736 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1740 if (mtvd
->vdev_islog
) {
1742 * Load the slog device's state from the MOS
1743 * config since it's possible that the label
1744 * does not contain the most up-to-date
1747 vdev_load_log_state(tvd
, mtvd
);
1752 * Per-vdev ZAP info is stored exclusively in the MOS.
1754 spa_config_valid_zaps(tvd
, mtvd
);
1759 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1762 * Ensure we were able to validate the config.
1764 return (rvd
->vdev_guid_sum
== spa
->spa_uberblock
.ub_guid_sum
);
1768 * Check for missing log devices
1771 spa_check_logs(spa_t
*spa
)
1773 boolean_t rv
= B_FALSE
;
1774 dsl_pool_t
*dp
= spa_get_dsl(spa
);
1776 switch (spa
->spa_log_state
) {
1777 case SPA_LOG_MISSING
:
1778 /* need to recheck in case slog has been restored */
1779 case SPA_LOG_UNKNOWN
:
1780 rv
= (dmu_objset_find_dp(dp
, dp
->dp_root_dir_obj
,
1781 zil_check_log_chain
, NULL
, DS_FIND_CHILDREN
) != 0);
1783 spa_set_log_state(spa
, SPA_LOG_MISSING
);
1790 spa_passivate_log(spa_t
*spa
)
1792 vdev_t
*rvd
= spa
->spa_root_vdev
;
1793 boolean_t slog_found
= B_FALSE
;
1795 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1797 if (!spa_has_slogs(spa
))
1800 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1801 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1802 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1804 if (tvd
->vdev_islog
) {
1805 metaslab_group_passivate(mg
);
1806 slog_found
= B_TRUE
;
1810 return (slog_found
);
1814 spa_activate_log(spa_t
*spa
)
1816 vdev_t
*rvd
= spa
->spa_root_vdev
;
1818 ASSERT(spa_config_held(spa
, SCL_ALLOC
, RW_WRITER
));
1820 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
1821 vdev_t
*tvd
= rvd
->vdev_child
[c
];
1822 metaslab_group_t
*mg
= tvd
->vdev_mg
;
1824 if (tvd
->vdev_islog
)
1825 metaslab_group_activate(mg
);
1830 spa_offline_log(spa_t
*spa
)
1834 error
= dmu_objset_find(spa_name(spa
), zil_vdev_offline
,
1835 NULL
, DS_FIND_CHILDREN
);
1838 * We successfully offlined the log device, sync out the
1839 * current txg so that the "stubby" block can be removed
1842 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1848 spa_aux_check_removed(spa_aux_vdev_t
*sav
)
1850 for (int i
= 0; i
< sav
->sav_count
; i
++)
1851 spa_check_removed(sav
->sav_vdevs
[i
]);
1855 spa_claim_notify(zio_t
*zio
)
1857 spa_t
*spa
= zio
->io_spa
;
1862 mutex_enter(&spa
->spa_props_lock
); /* any mutex will do */
1863 if (spa
->spa_claim_max_txg
< zio
->io_bp
->blk_birth
)
1864 spa
->spa_claim_max_txg
= zio
->io_bp
->blk_birth
;
1865 mutex_exit(&spa
->spa_props_lock
);
1868 typedef struct spa_load_error
{
1869 uint64_t sle_meta_count
;
1870 uint64_t sle_data_count
;
1874 spa_load_verify_done(zio_t
*zio
)
1876 blkptr_t
*bp
= zio
->io_bp
;
1877 spa_load_error_t
*sle
= zio
->io_private
;
1878 dmu_object_type_t type
= BP_GET_TYPE(bp
);
1879 int error
= zio
->io_error
;
1880 spa_t
*spa
= zio
->io_spa
;
1882 abd_free(zio
->io_abd
);
1884 if ((BP_GET_LEVEL(bp
) != 0 || DMU_OT_IS_METADATA(type
)) &&
1885 type
!= DMU_OT_INTENT_LOG
)
1886 atomic_inc_64(&sle
->sle_meta_count
);
1888 atomic_inc_64(&sle
->sle_data_count
);
1891 mutex_enter(&spa
->spa_scrub_lock
);
1892 spa
->spa_scrub_inflight
--;
1893 cv_broadcast(&spa
->spa_scrub_io_cv
);
1894 mutex_exit(&spa
->spa_scrub_lock
);
1898 * Maximum number of concurrent scrub i/os to create while verifying
1899 * a pool while importing it.
1901 int spa_load_verify_maxinflight
= 10000;
1902 boolean_t spa_load_verify_metadata
= B_TRUE
;
1903 boolean_t spa_load_verify_data
= B_TRUE
;
1907 spa_load_verify_cb(spa_t
*spa
, zilog_t
*zilog
, const blkptr_t
*bp
,
1908 const zbookmark_phys_t
*zb
, const dnode_phys_t
*dnp
, void *arg
)
1910 if (bp
== NULL
|| BP_IS_HOLE(bp
) || BP_IS_EMBEDDED(bp
))
1913 * Note: normally this routine will not be called if
1914 * spa_load_verify_metadata is not set. However, it may be useful
1915 * to manually set the flag after the traversal has begun.
1917 if (!spa_load_verify_metadata
)
1919 if (!BP_IS_METADATA(bp
) && !spa_load_verify_data
)
1923 size_t size
= BP_GET_PSIZE(bp
);
1925 mutex_enter(&spa
->spa_scrub_lock
);
1926 while (spa
->spa_scrub_inflight
>= spa_load_verify_maxinflight
)
1927 cv_wait(&spa
->spa_scrub_io_cv
, &spa
->spa_scrub_lock
);
1928 spa
->spa_scrub_inflight
++;
1929 mutex_exit(&spa
->spa_scrub_lock
);
1931 zio_nowait(zio_read(rio
, spa
, bp
, abd_alloc_for_io(size
, B_FALSE
), size
,
1932 spa_load_verify_done
, rio
->io_private
, ZIO_PRIORITY_SCRUB
,
1933 ZIO_FLAG_SPECULATIVE
| ZIO_FLAG_CANFAIL
|
1934 ZIO_FLAG_SCRUB
| ZIO_FLAG_RAW
, zb
));
1940 verify_dataset_name_len(dsl_pool_t
*dp
, dsl_dataset_t
*ds
, void *arg
)
1942 if (dsl_dataset_namelen(ds
) >= ZFS_MAX_DATASET_NAME_LEN
)
1943 return (SET_ERROR(ENAMETOOLONG
));
1949 spa_load_verify(spa_t
*spa
)
1952 spa_load_error_t sle
= { 0 };
1953 zpool_rewind_policy_t policy
;
1954 boolean_t verify_ok
= B_FALSE
;
1957 zpool_get_rewind_policy(spa
->spa_config
, &policy
);
1959 if (policy
.zrp_request
& ZPOOL_NEVER_REWIND
)
1962 dsl_pool_config_enter(spa
->spa_dsl_pool
, FTAG
);
1963 error
= dmu_objset_find_dp(spa
->spa_dsl_pool
,
1964 spa
->spa_dsl_pool
->dp_root_dir_obj
, verify_dataset_name_len
, NULL
,
1966 dsl_pool_config_exit(spa
->spa_dsl_pool
, FTAG
);
1970 rio
= zio_root(spa
, NULL
, &sle
,
1971 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
);
1973 if (spa_load_verify_metadata
) {
1974 error
= traverse_pool(spa
, spa
->spa_verify_min_txg
,
1975 TRAVERSE_PRE
| TRAVERSE_PREFETCH_METADATA
,
1976 spa_load_verify_cb
, rio
);
1979 (void) zio_wait(rio
);
1981 spa
->spa_load_meta_errors
= sle
.sle_meta_count
;
1982 spa
->spa_load_data_errors
= sle
.sle_data_count
;
1984 if (!error
&& sle
.sle_meta_count
<= policy
.zrp_maxmeta
&&
1985 sle
.sle_data_count
<= policy
.zrp_maxdata
) {
1989 spa
->spa_load_txg
= spa
->spa_uberblock
.ub_txg
;
1990 spa
->spa_load_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
1992 loss
= spa
->spa_last_ubsync_txg_ts
- spa
->spa_load_txg_ts
;
1993 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1994 ZPOOL_CONFIG_LOAD_TIME
, spa
->spa_load_txg_ts
) == 0);
1995 VERIFY(nvlist_add_int64(spa
->spa_load_info
,
1996 ZPOOL_CONFIG_REWIND_TIME
, loss
) == 0);
1997 VERIFY(nvlist_add_uint64(spa
->spa_load_info
,
1998 ZPOOL_CONFIG_LOAD_DATA_ERRORS
, sle
.sle_data_count
) == 0);
2000 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
;
2004 if (error
!= ENXIO
&& error
!= EIO
)
2005 error
= SET_ERROR(EIO
);
2009 return (verify_ok
? 0 : EIO
);
2013 * Find a value in the pool props object.
2016 spa_prop_find(spa_t
*spa
, zpool_prop_t prop
, uint64_t *val
)
2018 (void) zap_lookup(spa
->spa_meta_objset
, spa
->spa_pool_props_object
,
2019 zpool_prop_to_name(prop
), sizeof (uint64_t), 1, val
);
2023 * Find a value in the pool directory object.
2026 spa_dir_prop(spa_t
*spa
, const char *name
, uint64_t *val
)
2028 return (zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
2029 name
, sizeof (uint64_t), 1, val
));
2033 spa_vdev_err(vdev_t
*vdev
, vdev_aux_t aux
, int err
)
2035 vdev_set_state(vdev
, B_TRUE
, VDEV_STATE_CANT_OPEN
, aux
);
2040 * Fix up config after a partly-completed split. This is done with the
2041 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off
2042 * pool have that entry in their config, but only the splitting one contains
2043 * a list of all the guids of the vdevs that are being split off.
2045 * This function determines what to do with that list: either rejoin
2046 * all the disks to the pool, or complete the splitting process. To attempt
2047 * the rejoin, each disk that is offlined is marked online again, and
2048 * we do a reopen() call. If the vdev label for every disk that was
2049 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL)
2050 * then we call vdev_split() on each disk, and complete the split.
2052 * Otherwise we leave the config alone, with all the vdevs in place in
2053 * the original pool.
2056 spa_try_repair(spa_t
*spa
, nvlist_t
*config
)
2063 boolean_t attempt_reopen
;
2065 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
, &nvl
) != 0)
2068 /* check that the config is complete */
2069 if (nvlist_lookup_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
2070 &glist
, &gcount
) != 0)
2073 vd
= kmem_zalloc(gcount
* sizeof (vdev_t
*), KM_SLEEP
);
2075 /* attempt to online all the vdevs & validate */
2076 attempt_reopen
= B_TRUE
;
2077 for (i
= 0; i
< gcount
; i
++) {
2078 if (glist
[i
] == 0) /* vdev is hole */
2081 vd
[i
] = spa_lookup_by_guid(spa
, glist
[i
], B_FALSE
);
2082 if (vd
[i
] == NULL
) {
2084 * Don't bother attempting to reopen the disks;
2085 * just do the split.
2087 attempt_reopen
= B_FALSE
;
2089 /* attempt to re-online it */
2090 vd
[i
]->vdev_offline
= B_FALSE
;
2094 if (attempt_reopen
) {
2095 vdev_reopen(spa
->spa_root_vdev
);
2097 /* check each device to see what state it's in */
2098 for (extracted
= 0, i
= 0; i
< gcount
; i
++) {
2099 if (vd
[i
] != NULL
&&
2100 vd
[i
]->vdev_stat
.vs_aux
!= VDEV_AUX_SPLIT_POOL
)
2107 * If every disk has been moved to the new pool, or if we never
2108 * even attempted to look at them, then we split them off for
2111 if (!attempt_reopen
|| gcount
== extracted
) {
2112 for (i
= 0; i
< gcount
; i
++)
2115 vdev_reopen(spa
->spa_root_vdev
);
2118 kmem_free(vd
, gcount
* sizeof (vdev_t
*));
2122 spa_load(spa_t
*spa
, spa_load_state_t state
, spa_import_type_t type
,
2123 boolean_t mosconfig
)
2125 nvlist_t
*config
= spa
->spa_config
;
2126 char *ereport
= FM_EREPORT_ZFS_POOL
;
2132 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
, &pool_guid
))
2133 return (SET_ERROR(EINVAL
));
2135 ASSERT(spa
->spa_comment
== NULL
);
2136 if (nvlist_lookup_string(config
, ZPOOL_CONFIG_COMMENT
, &comment
) == 0)
2137 spa
->spa_comment
= spa_strdup(comment
);
2140 * Versioning wasn't explicitly added to the label until later, so if
2141 * it's not present treat it as the initial version.
2143 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VERSION
,
2144 &spa
->spa_ubsync
.ub_version
) != 0)
2145 spa
->spa_ubsync
.ub_version
= SPA_VERSION_INITIAL
;
2147 (void) nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
2148 &spa
->spa_config_txg
);
2150 if ((state
== SPA_LOAD_IMPORT
|| state
== SPA_LOAD_TRYIMPORT
) &&
2151 spa_guid_exists(pool_guid
, 0)) {
2152 error
= SET_ERROR(EEXIST
);
2154 spa
->spa_config_guid
= pool_guid
;
2156 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_SPLIT
,
2158 VERIFY(nvlist_dup(nvl
, &spa
->spa_config_splitting
,
2162 nvlist_free(spa
->spa_load_info
);
2163 spa
->spa_load_info
= fnvlist_alloc();
2165 gethrestime(&spa
->spa_loaded_ts
);
2166 error
= spa_load_impl(spa
, pool_guid
, config
, state
, type
,
2167 mosconfig
, &ereport
);
2171 * Don't count references from objsets that are already closed
2172 * and are making their way through the eviction process.
2174 spa_evicting_os_wait(spa
);
2175 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
2177 if (error
!= EEXIST
) {
2178 spa
->spa_loaded_ts
.tv_sec
= 0;
2179 spa
->spa_loaded_ts
.tv_nsec
= 0;
2181 if (error
!= EBADF
) {
2182 zfs_ereport_post(ereport
, spa
, NULL
, NULL
, 0, 0);
2185 spa
->spa_load_state
= error
? SPA_LOAD_ERROR
: SPA_LOAD_NONE
;
2192 * Count the number of per-vdev ZAPs associated with all of the vdevs in the
2193 * vdev tree rooted in the given vd, and ensure that each ZAP is present in the
2194 * spa's per-vdev ZAP list.
2197 vdev_count_verify_zaps(vdev_t
*vd
)
2199 spa_t
*spa
= vd
->vdev_spa
;
2201 if (vd
->vdev_top_zap
!= 0) {
2203 ASSERT0(zap_lookup_int(spa
->spa_meta_objset
,
2204 spa
->spa_all_vdev_zaps
, vd
->vdev_top_zap
));
2206 if (vd
->vdev_leaf_zap
!= 0) {
2208 ASSERT0(zap_lookup_int(spa
->spa_meta_objset
,
2209 spa
->spa_all_vdev_zaps
, vd
->vdev_leaf_zap
));
2212 for (uint64_t i
= 0; i
< vd
->vdev_children
; i
++) {
2213 total
+= vdev_count_verify_zaps(vd
->vdev_child
[i
]);
2220 * Load an existing storage pool, using the pool's builtin spa_config as a
2221 * source of configuration information.
2224 spa_load_impl(spa_t
*spa
, uint64_t pool_guid
, nvlist_t
*config
,
2225 spa_load_state_t state
, spa_import_type_t type
, boolean_t mosconfig
,
2229 nvlist_t
*nvroot
= NULL
;
2232 uberblock_t
*ub
= &spa
->spa_uberblock
;
2233 uint64_t children
, config_cache_txg
= spa
->spa_config_txg
;
2234 int orig_mode
= spa
->spa_mode
;
2237 boolean_t missing_feat_write
= B_FALSE
;
2240 * If this is an untrusted config, access the pool in read-only mode.
2241 * This prevents things like resilvering recently removed devices.
2244 spa
->spa_mode
= FREAD
;
2246 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
2248 spa
->spa_load_state
= state
;
2250 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvroot
))
2251 return (SET_ERROR(EINVAL
));
2253 parse
= (type
== SPA_IMPORT_EXISTING
?
2254 VDEV_ALLOC_LOAD
: VDEV_ALLOC_SPLIT
);
2257 * Create "The Godfather" zio to hold all async IOs
2259 spa
->spa_async_zio_root
= kmem_alloc(max_ncpus
* sizeof (void *),
2261 for (int i
= 0; i
< max_ncpus
; i
++) {
2262 spa
->spa_async_zio_root
[i
] = zio_root(spa
, NULL
, NULL
,
2263 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
|
2264 ZIO_FLAG_GODFATHER
);
2268 * Parse the configuration into a vdev tree. We explicitly set the
2269 * value that will be returned by spa_version() since parsing the
2270 * configuration requires knowing the version number.
2272 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2273 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, parse
);
2274 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2279 ASSERT(spa
->spa_root_vdev
== rvd
);
2280 ASSERT3U(spa
->spa_min_ashift
, >=, SPA_MINBLOCKSHIFT
);
2281 ASSERT3U(spa
->spa_max_ashift
, <=, SPA_MAXBLOCKSHIFT
);
2283 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2284 ASSERT(spa_guid(spa
) == pool_guid
);
2288 * Try to open all vdevs, loading each label in the process.
2290 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2291 error
= vdev_open(rvd
);
2292 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2297 * We need to validate the vdev labels against the configuration that
2298 * we have in hand, which is dependent on the setting of mosconfig. If
2299 * mosconfig is true then we're validating the vdev labels based on
2300 * that config. Otherwise, we're validating against the cached config
2301 * (zpool.cache) that was read when we loaded the zfs module, and then
2302 * later we will recursively call spa_load() and validate against
2305 * If we're assembling a new pool that's been split off from an
2306 * existing pool, the labels haven't yet been updated so we skip
2307 * validation for now.
2309 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2310 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2311 error
= vdev_validate(rvd
, mosconfig
);
2312 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2317 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2318 return (SET_ERROR(ENXIO
));
2322 * Find the best uberblock.
2324 vdev_uberblock_load(rvd
, ub
, &label
);
2327 * If we weren't able to find a single valid uberblock, return failure.
2329 if (ub
->ub_txg
== 0) {
2331 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, ENXIO
));
2335 * If the pool has an unsupported version we can't open it.
2337 if (!SPA_VERSION_IS_SUPPORTED(ub
->ub_version
)) {
2339 return (spa_vdev_err(rvd
, VDEV_AUX_VERSION_NEWER
, ENOTSUP
));
2342 if (ub
->ub_version
>= SPA_VERSION_FEATURES
) {
2346 * If we weren't able to find what's necessary for reading the
2347 * MOS in the label, return failure.
2349 if (label
== NULL
|| nvlist_lookup_nvlist(label
,
2350 ZPOOL_CONFIG_FEATURES_FOR_READ
, &features
) != 0) {
2352 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2357 * Update our in-core representation with the definitive values
2360 nvlist_free(spa
->spa_label_features
);
2361 VERIFY(nvlist_dup(features
, &spa
->spa_label_features
, 0) == 0);
2367 * Look through entries in the label nvlist's features_for_read. If
2368 * there is a feature listed there which we don't understand then we
2369 * cannot open a pool.
2371 if (ub
->ub_version
>= SPA_VERSION_FEATURES
) {
2372 nvlist_t
*unsup_feat
;
2374 VERIFY(nvlist_alloc(&unsup_feat
, NV_UNIQUE_NAME
, KM_SLEEP
) ==
2377 for (nvpair_t
*nvp
= nvlist_next_nvpair(spa
->spa_label_features
,
2379 nvp
= nvlist_next_nvpair(spa
->spa_label_features
, nvp
)) {
2380 if (!zfeature_is_supported(nvpair_name(nvp
))) {
2381 VERIFY(nvlist_add_string(unsup_feat
,
2382 nvpair_name(nvp
), "") == 0);
2386 if (!nvlist_empty(unsup_feat
)) {
2387 VERIFY(nvlist_add_nvlist(spa
->spa_load_info
,
2388 ZPOOL_CONFIG_UNSUP_FEAT
, unsup_feat
) == 0);
2389 nvlist_free(unsup_feat
);
2390 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
,
2394 nvlist_free(unsup_feat
);
2398 * If the vdev guid sum doesn't match the uberblock, we have an
2399 * incomplete configuration. We first check to see if the pool
2400 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN).
2401 * If it is, defer the vdev_guid_sum check till later so we
2402 * can handle missing vdevs.
2404 if (nvlist_lookup_uint64(config
, ZPOOL_CONFIG_VDEV_CHILDREN
,
2405 &children
) != 0 && mosconfig
&& type
!= SPA_IMPORT_ASSEMBLE
&&
2406 rvd
->vdev_guid_sum
!= ub
->ub_guid_sum
)
2407 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
, ENXIO
));
2409 if (type
!= SPA_IMPORT_ASSEMBLE
&& spa
->spa_config_splitting
) {
2410 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2411 spa_try_repair(spa
, config
);
2412 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2413 nvlist_free(spa
->spa_config_splitting
);
2414 spa
->spa_config_splitting
= NULL
;
2418 * Initialize internal SPA structures.
2420 spa
->spa_state
= POOL_STATE_ACTIVE
;
2421 spa
->spa_ubsync
= spa
->spa_uberblock
;
2422 spa
->spa_verify_min_txg
= spa
->spa_extreme_rewind
?
2423 TXG_INITIAL
- 1 : spa_last_synced_txg(spa
) - TXG_DEFER_SIZE
- 1;
2424 spa
->spa_first_txg
= spa
->spa_last_ubsync_txg
?
2425 spa
->spa_last_ubsync_txg
: spa_last_synced_txg(spa
) + 1;
2426 spa
->spa_claim_max_txg
= spa
->spa_first_txg
;
2427 spa
->spa_prev_software_version
= ub
->ub_software_version
;
2429 error
= dsl_pool_init(spa
, spa
->spa_first_txg
, &spa
->spa_dsl_pool
);
2431 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2432 spa
->spa_meta_objset
= spa
->spa_dsl_pool
->dp_meta_objset
;
2434 if (spa_dir_prop(spa
, DMU_POOL_CONFIG
, &spa
->spa_config_object
) != 0)
2435 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2437 if (spa_version(spa
) >= SPA_VERSION_FEATURES
) {
2438 boolean_t missing_feat_read
= B_FALSE
;
2439 nvlist_t
*unsup_feat
, *enabled_feat
;
2441 if (spa_dir_prop(spa
, DMU_POOL_FEATURES_FOR_READ
,
2442 &spa
->spa_feat_for_read_obj
) != 0) {
2443 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2446 if (spa_dir_prop(spa
, DMU_POOL_FEATURES_FOR_WRITE
,
2447 &spa
->spa_feat_for_write_obj
) != 0) {
2448 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2451 if (spa_dir_prop(spa
, DMU_POOL_FEATURE_DESCRIPTIONS
,
2452 &spa
->spa_feat_desc_obj
) != 0) {
2453 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2456 enabled_feat
= fnvlist_alloc();
2457 unsup_feat
= fnvlist_alloc();
2459 if (!spa_features_check(spa
, B_FALSE
,
2460 unsup_feat
, enabled_feat
))
2461 missing_feat_read
= B_TRUE
;
2463 if (spa_writeable(spa
) || state
== SPA_LOAD_TRYIMPORT
) {
2464 if (!spa_features_check(spa
, B_TRUE
,
2465 unsup_feat
, enabled_feat
)) {
2466 missing_feat_write
= B_TRUE
;
2470 fnvlist_add_nvlist(spa
->spa_load_info
,
2471 ZPOOL_CONFIG_ENABLED_FEAT
, enabled_feat
);
2473 if (!nvlist_empty(unsup_feat
)) {
2474 fnvlist_add_nvlist(spa
->spa_load_info
,
2475 ZPOOL_CONFIG_UNSUP_FEAT
, unsup_feat
);
2478 fnvlist_free(enabled_feat
);
2479 fnvlist_free(unsup_feat
);
2481 if (!missing_feat_read
) {
2482 fnvlist_add_boolean(spa
->spa_load_info
,
2483 ZPOOL_CONFIG_CAN_RDONLY
);
2487 * If the state is SPA_LOAD_TRYIMPORT, our objective is
2488 * twofold: to determine whether the pool is available for
2489 * import in read-write mode and (if it is not) whether the
2490 * pool is available for import in read-only mode. If the pool
2491 * is available for import in read-write mode, it is displayed
2492 * as available in userland; if it is not available for import
2493 * in read-only mode, it is displayed as unavailable in
2494 * userland. If the pool is available for import in read-only
2495 * mode but not read-write mode, it is displayed as unavailable
2496 * in userland with a special note that the pool is actually
2497 * available for open in read-only mode.
2499 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are
2500 * missing a feature for write, we must first determine whether
2501 * the pool can be opened read-only before returning to
2502 * userland in order to know whether to display the
2503 * abovementioned note.
2505 if (missing_feat_read
|| (missing_feat_write
&&
2506 spa_writeable(spa
))) {
2507 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
,
2512 * Load refcounts for ZFS features from disk into an in-memory
2513 * cache during SPA initialization.
2515 for (spa_feature_t i
= 0; i
< SPA_FEATURES
; i
++) {
2518 error
= feature_get_refcount_from_disk(spa
,
2519 &spa_feature_table
[i
], &refcount
);
2521 spa
->spa_feat_refcount_cache
[i
] = refcount
;
2522 } else if (error
== ENOTSUP
) {
2523 spa
->spa_feat_refcount_cache
[i
] =
2524 SPA_FEATURE_DISABLED
;
2526 return (spa_vdev_err(rvd
,
2527 VDEV_AUX_CORRUPT_DATA
, EIO
));
2532 if (spa_feature_is_active(spa
, SPA_FEATURE_ENABLED_TXG
)) {
2533 if (spa_dir_prop(spa
, DMU_POOL_FEATURE_ENABLED_TXG
,
2534 &spa
->spa_feat_enabled_txg_obj
) != 0)
2535 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2538 spa
->spa_is_initializing
= B_TRUE
;
2539 error
= dsl_pool_open(spa
->spa_dsl_pool
);
2540 spa
->spa_is_initializing
= B_FALSE
;
2542 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2546 nvlist_t
*policy
= NULL
, *nvconfig
;
2548 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2549 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2551 if (!spa_is_root(spa
) && nvlist_lookup_uint64(nvconfig
,
2552 ZPOOL_CONFIG_HOSTID
, &hostid
) == 0) {
2554 unsigned long myhostid
= 0;
2556 VERIFY(nvlist_lookup_string(nvconfig
,
2557 ZPOOL_CONFIG_HOSTNAME
, &hostname
) == 0);
2560 myhostid
= zone_get_hostid(NULL
);
2563 * We're emulating the system's hostid in userland, so
2564 * we can't use zone_get_hostid().
2566 (void) ddi_strtoul(hw_serial
, NULL
, 10, &myhostid
);
2567 #endif /* _KERNEL */
2568 if (hostid
!= 0 && myhostid
!= 0 &&
2569 hostid
!= myhostid
) {
2570 nvlist_free(nvconfig
);
2571 cmn_err(CE_WARN
, "pool '%s' could not be "
2572 "loaded as it was last accessed by "
2573 "another system (host: %s hostid: 0x%lx). "
2574 "See: http://illumos.org/msg/ZFS-8000-EY",
2575 spa_name(spa
), hostname
,
2576 (unsigned long)hostid
);
2577 return (SET_ERROR(EBADF
));
2580 if (nvlist_lookup_nvlist(spa
->spa_config
,
2581 ZPOOL_REWIND_POLICY
, &policy
) == 0)
2582 VERIFY(nvlist_add_nvlist(nvconfig
,
2583 ZPOOL_REWIND_POLICY
, policy
) == 0);
2585 spa_config_set(spa
, nvconfig
);
2587 spa_deactivate(spa
);
2588 spa_activate(spa
, orig_mode
);
2590 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, B_TRUE
));
2593 /* Grab the secret checksum salt from the MOS. */
2594 error
= zap_lookup(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
2595 DMU_POOL_CHECKSUM_SALT
, 1,
2596 sizeof (spa
->spa_cksum_salt
.zcs_bytes
),
2597 spa
->spa_cksum_salt
.zcs_bytes
);
2598 if (error
== ENOENT
) {
2599 /* Generate a new salt for subsequent use */
2600 (void) random_get_pseudo_bytes(spa
->spa_cksum_salt
.zcs_bytes
,
2601 sizeof (spa
->spa_cksum_salt
.zcs_bytes
));
2602 } else if (error
!= 0) {
2603 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2606 if (spa_dir_prop(spa
, DMU_POOL_SYNC_BPOBJ
, &obj
) != 0)
2607 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2608 error
= bpobj_open(&spa
->spa_deferred_bpobj
, spa
->spa_meta_objset
, obj
);
2610 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2613 * Load the bit that tells us to use the new accounting function
2614 * (raid-z deflation). If we have an older pool, this will not
2617 error
= spa_dir_prop(spa
, DMU_POOL_DEFLATE
, &spa
->spa_deflate
);
2618 if (error
!= 0 && error
!= ENOENT
)
2619 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2621 error
= spa_dir_prop(spa
, DMU_POOL_CREATION_VERSION
,
2622 &spa
->spa_creation_version
);
2623 if (error
!= 0 && error
!= ENOENT
)
2624 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2627 * Load the persistent error log. If we have an older pool, this will
2630 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_LAST
, &spa
->spa_errlog_last
);
2631 if (error
!= 0 && error
!= ENOENT
)
2632 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2634 error
= spa_dir_prop(spa
, DMU_POOL_ERRLOG_SCRUB
,
2635 &spa
->spa_errlog_scrub
);
2636 if (error
!= 0 && error
!= ENOENT
)
2637 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2640 * Load the history object. If we have an older pool, this
2641 * will not be present.
2643 error
= spa_dir_prop(spa
, DMU_POOL_HISTORY
, &spa
->spa_history
);
2644 if (error
!= 0 && error
!= ENOENT
)
2645 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2648 * Load the per-vdev ZAP map. If we have an older pool, this will not
2649 * be present; in this case, defer its creation to a later time to
2650 * avoid dirtying the MOS this early / out of sync context. See
2651 * spa_sync_config_object.
2654 /* The sentinel is only available in the MOS config. */
2655 nvlist_t
*mos_config
;
2656 if (load_nvlist(spa
, spa
->spa_config_object
, &mos_config
) != 0)
2657 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2659 error
= spa_dir_prop(spa
, DMU_POOL_VDEV_ZAP_MAP
,
2660 &spa
->spa_all_vdev_zaps
);
2662 if (error
== ENOENT
) {
2663 VERIFY(!nvlist_exists(mos_config
,
2664 ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS
));
2665 spa
->spa_avz_action
= AVZ_ACTION_INITIALIZE
;
2666 ASSERT0(vdev_count_verify_zaps(spa
->spa_root_vdev
));
2667 } else if (error
!= 0) {
2668 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2669 } else if (!nvlist_exists(mos_config
, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS
)) {
2671 * An older version of ZFS overwrote the sentinel value, so
2672 * we have orphaned per-vdev ZAPs in the MOS. Defer their
2673 * destruction to later; see spa_sync_config_object.
2675 spa
->spa_avz_action
= AVZ_ACTION_DESTROY
;
2677 * We're assuming that no vdevs have had their ZAPs created
2678 * before this. Better be sure of it.
2680 ASSERT0(vdev_count_verify_zaps(spa
->spa_root_vdev
));
2682 nvlist_free(mos_config
);
2685 * If we're assembling the pool from the split-off vdevs of
2686 * an existing pool, we don't want to attach the spares & cache
2691 * Load any hot spares for this pool.
2693 error
= spa_dir_prop(spa
, DMU_POOL_SPARES
, &spa
->spa_spares
.sav_object
);
2694 if (error
!= 0 && error
!= ENOENT
)
2695 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2696 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2697 ASSERT(spa_version(spa
) >= SPA_VERSION_SPARES
);
2698 if (load_nvlist(spa
, spa
->spa_spares
.sav_object
,
2699 &spa
->spa_spares
.sav_config
) != 0)
2700 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2702 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2703 spa_load_spares(spa
);
2704 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2705 } else if (error
== 0) {
2706 spa
->spa_spares
.sav_sync
= B_TRUE
;
2710 * Load any level 2 ARC devices for this pool.
2712 error
= spa_dir_prop(spa
, DMU_POOL_L2CACHE
,
2713 &spa
->spa_l2cache
.sav_object
);
2714 if (error
!= 0 && error
!= ENOENT
)
2715 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2716 if (error
== 0 && type
!= SPA_IMPORT_ASSEMBLE
) {
2717 ASSERT(spa_version(spa
) >= SPA_VERSION_L2CACHE
);
2718 if (load_nvlist(spa
, spa
->spa_l2cache
.sav_object
,
2719 &spa
->spa_l2cache
.sav_config
) != 0)
2720 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2722 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2723 spa_load_l2cache(spa
);
2724 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2725 } else if (error
== 0) {
2726 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
2729 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
2731 error
= spa_dir_prop(spa
, DMU_POOL_PROPS
, &spa
->spa_pool_props_object
);
2732 if (error
&& error
!= ENOENT
)
2733 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2736 uint64_t autoreplace
;
2738 spa_prop_find(spa
, ZPOOL_PROP_BOOTFS
, &spa
->spa_bootfs
);
2739 spa_prop_find(spa
, ZPOOL_PROP_AUTOREPLACE
, &autoreplace
);
2740 spa_prop_find(spa
, ZPOOL_PROP_DELEGATION
, &spa
->spa_delegation
);
2741 spa_prop_find(spa
, ZPOOL_PROP_FAILUREMODE
, &spa
->spa_failmode
);
2742 spa_prop_find(spa
, ZPOOL_PROP_AUTOEXPAND
, &spa
->spa_autoexpand
);
2743 spa_prop_find(spa
, ZPOOL_PROP_BOOTSIZE
, &spa
->spa_bootsize
);
2744 spa_prop_find(spa
, ZPOOL_PROP_DEDUPDITTO
,
2745 &spa
->spa_dedup_ditto
);
2747 spa
->spa_autoreplace
= (autoreplace
!= 0);
2751 * If the 'autoreplace' property is set, then post a resource notifying
2752 * the ZFS DE that it should not issue any faults for unopenable
2753 * devices. We also iterate over the vdevs, and post a sysevent for any
2754 * unopenable vdevs so that the normal autoreplace handler can take
2757 if (spa
->spa_autoreplace
&& state
!= SPA_LOAD_TRYIMPORT
) {
2758 spa_check_removed(spa
->spa_root_vdev
);
2760 * For the import case, this is done in spa_import(), because
2761 * at this point we're using the spare definitions from
2762 * the MOS config, not necessarily from the userland config.
2764 if (state
!= SPA_LOAD_IMPORT
) {
2765 spa_aux_check_removed(&spa
->spa_spares
);
2766 spa_aux_check_removed(&spa
->spa_l2cache
);
2771 * Load the vdev state for all toplevel vdevs.
2776 * Propagate the leaf DTLs we just loaded all the way up the tree.
2778 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
2779 vdev_dtl_reassess(rvd
, 0, 0, B_FALSE
);
2780 spa_config_exit(spa
, SCL_ALL
, FTAG
);
2783 * Load the DDTs (dedup tables).
2785 error
= ddt_load(spa
);
2787 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2789 spa_update_dspace(spa
);
2792 * Validate the config, using the MOS config to fill in any
2793 * information which might be missing. If we fail to validate
2794 * the config then declare the pool unfit for use. If we're
2795 * assembling a pool from a split, the log is not transferred
2798 if (type
!= SPA_IMPORT_ASSEMBLE
) {
2801 if (load_nvlist(spa
, spa
->spa_config_object
, &nvconfig
) != 0)
2802 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
, EIO
));
2804 if (!spa_config_valid(spa
, nvconfig
)) {
2805 nvlist_free(nvconfig
);
2806 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_GUID_SUM
,
2809 nvlist_free(nvconfig
);
2812 * Now that we've validated the config, check the state of the
2813 * root vdev. If it can't be opened, it indicates one or
2814 * more toplevel vdevs are faulted.
2816 if (rvd
->vdev_state
<= VDEV_STATE_CANT_OPEN
)
2817 return (SET_ERROR(ENXIO
));
2819 if (spa_writeable(spa
) && spa_check_logs(spa
)) {
2820 *ereport
= FM_EREPORT_ZFS_LOG_REPLAY
;
2821 return (spa_vdev_err(rvd
, VDEV_AUX_BAD_LOG
, ENXIO
));
2825 if (missing_feat_write
) {
2826 ASSERT(state
== SPA_LOAD_TRYIMPORT
);
2829 * At this point, we know that we can open the pool in
2830 * read-only mode but not read-write mode. We now have enough
2831 * information and can return to userland.
2833 return (spa_vdev_err(rvd
, VDEV_AUX_UNSUP_FEAT
, ENOTSUP
));
2837 * We've successfully opened the pool, verify that we're ready
2838 * to start pushing transactions.
2840 if (state
!= SPA_LOAD_TRYIMPORT
) {
2841 if (error
= spa_load_verify(spa
))
2842 return (spa_vdev_err(rvd
, VDEV_AUX_CORRUPT_DATA
,
2846 if (spa_writeable(spa
) && (state
== SPA_LOAD_RECOVER
||
2847 spa
->spa_load_max_txg
== UINT64_MAX
)) {
2849 int need_update
= B_FALSE
;
2850 dsl_pool_t
*dp
= spa_get_dsl(spa
);
2852 ASSERT(state
!= SPA_LOAD_TRYIMPORT
);
2855 * Claim log blocks that haven't been committed yet.
2856 * This must all happen in a single txg.
2857 * Note: spa_claim_max_txg is updated by spa_claim_notify(),
2858 * invoked from zil_claim_log_block()'s i/o done callback.
2859 * Price of rollback is that we abandon the log.
2861 spa
->spa_claiming
= B_TRUE
;
2863 tx
= dmu_tx_create_assigned(dp
, spa_first_txg(spa
));
2864 (void) dmu_objset_find_dp(dp
, dp
->dp_root_dir_obj
,
2865 zil_claim
, tx
, DS_FIND_CHILDREN
);
2868 spa
->spa_claiming
= B_FALSE
;
2870 spa_set_log_state(spa
, SPA_LOG_GOOD
);
2871 spa
->spa_sync_on
= B_TRUE
;
2872 txg_sync_start(spa
->spa_dsl_pool
);
2875 * Wait for all claims to sync. We sync up to the highest
2876 * claimed log block birth time so that claimed log blocks
2877 * don't appear to be from the future. spa_claim_max_txg
2878 * will have been set for us by either zil_check_log_chain()
2879 * (invoked from spa_check_logs()) or zil_claim() above.
2881 txg_wait_synced(spa
->spa_dsl_pool
, spa
->spa_claim_max_txg
);
2884 * If the config cache is stale, or we have uninitialized
2885 * metaslabs (see spa_vdev_add()), then update the config.
2887 * If this is a verbatim import, trust the current
2888 * in-core spa_config and update the disk labels.
2890 if (config_cache_txg
!= spa
->spa_config_txg
||
2891 state
== SPA_LOAD_IMPORT
||
2892 state
== SPA_LOAD_RECOVER
||
2893 (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
))
2894 need_update
= B_TRUE
;
2896 for (int c
= 0; c
< rvd
->vdev_children
; c
++)
2897 if (rvd
->vdev_child
[c
]->vdev_ms_array
== 0)
2898 need_update
= B_TRUE
;
2901 * Update the config cache asychronously in case we're the
2902 * root pool, in which case the config cache isn't writable yet.
2905 spa_async_request(spa
, SPA_ASYNC_CONFIG_UPDATE
);
2908 * Check all DTLs to see if anything needs resilvering.
2910 if (!dsl_scan_resilvering(spa
->spa_dsl_pool
) &&
2911 vdev_resilver_needed(rvd
, NULL
, NULL
))
2912 spa_async_request(spa
, SPA_ASYNC_RESILVER
);
2915 * Log the fact that we booted up (so that we can detect if
2916 * we rebooted in the middle of an operation).
2918 spa_history_log_version(spa
, "open");
2921 * Delete any inconsistent datasets.
2923 (void) dmu_objset_find(spa_name(spa
),
2924 dsl_destroy_inconsistent
, NULL
, DS_FIND_CHILDREN
);
2927 * Clean up any stale temporary dataset userrefs.
2929 dsl_pool_clean_tmp_userrefs(spa
->spa_dsl_pool
);
2936 spa_load_retry(spa_t
*spa
, spa_load_state_t state
, int mosconfig
)
2938 int mode
= spa
->spa_mode
;
2941 spa_deactivate(spa
);
2943 spa
->spa_load_max_txg
= spa
->spa_uberblock
.ub_txg
- 1;
2945 spa_activate(spa
, mode
);
2946 spa_async_suspend(spa
);
2948 return (spa_load(spa
, state
, SPA_IMPORT_EXISTING
, mosconfig
));
2952 * If spa_load() fails this function will try loading prior txg's. If
2953 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool
2954 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this
2955 * function will not rewind the pool and will return the same error as
2959 spa_load_best(spa_t
*spa
, spa_load_state_t state
, int mosconfig
,
2960 uint64_t max_request
, int rewind_flags
)
2962 nvlist_t
*loadinfo
= NULL
;
2963 nvlist_t
*config
= NULL
;
2964 int load_error
, rewind_error
;
2965 uint64_t safe_rewind_txg
;
2968 if (spa
->spa_load_txg
&& state
== SPA_LOAD_RECOVER
) {
2969 spa
->spa_load_max_txg
= spa
->spa_load_txg
;
2970 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2972 spa
->spa_load_max_txg
= max_request
;
2973 if (max_request
!= UINT64_MAX
)
2974 spa
->spa_extreme_rewind
= B_TRUE
;
2977 load_error
= rewind_error
= spa_load(spa
, state
, SPA_IMPORT_EXISTING
,
2979 if (load_error
== 0)
2982 if (spa
->spa_root_vdev
!= NULL
)
2983 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
2985 spa
->spa_last_ubsync_txg
= spa
->spa_uberblock
.ub_txg
;
2986 spa
->spa_last_ubsync_txg_ts
= spa
->spa_uberblock
.ub_timestamp
;
2988 if (rewind_flags
& ZPOOL_NEVER_REWIND
) {
2989 nvlist_free(config
);
2990 return (load_error
);
2993 if (state
== SPA_LOAD_RECOVER
) {
2994 /* Price of rolling back is discarding txgs, including log */
2995 spa_set_log_state(spa
, SPA_LOG_CLEAR
);
2998 * If we aren't rolling back save the load info from our first
2999 * import attempt so that we can restore it after attempting
3002 loadinfo
= spa
->spa_load_info
;
3003 spa
->spa_load_info
= fnvlist_alloc();
3006 spa
->spa_load_max_txg
= spa
->spa_last_ubsync_txg
;
3007 safe_rewind_txg
= spa
->spa_last_ubsync_txg
- TXG_DEFER_SIZE
;
3008 min_txg
= (rewind_flags
& ZPOOL_EXTREME_REWIND
) ?
3009 TXG_INITIAL
: safe_rewind_txg
;
3012 * Continue as long as we're finding errors, we're still within
3013 * the acceptable rewind range, and we're still finding uberblocks
3015 while (rewind_error
&& spa
->spa_uberblock
.ub_txg
>= min_txg
&&
3016 spa
->spa_uberblock
.ub_txg
<= spa
->spa_load_max_txg
) {
3017 if (spa
->spa_load_max_txg
< safe_rewind_txg
)
3018 spa
->spa_extreme_rewind
= B_TRUE
;
3019 rewind_error
= spa_load_retry(spa
, state
, mosconfig
);
3022 spa
->spa_extreme_rewind
= B_FALSE
;
3023 spa
->spa_load_max_txg
= UINT64_MAX
;
3025 if (config
&& (rewind_error
|| state
!= SPA_LOAD_RECOVER
))
3026 spa_config_set(spa
, config
);
3028 if (state
== SPA_LOAD_RECOVER
) {
3029 ASSERT3P(loadinfo
, ==, NULL
);
3030 return (rewind_error
);
3032 /* Store the rewind info as part of the initial load info */
3033 fnvlist_add_nvlist(loadinfo
, ZPOOL_CONFIG_REWIND_INFO
,
3034 spa
->spa_load_info
);
3036 /* Restore the initial load info */
3037 fnvlist_free(spa
->spa_load_info
);
3038 spa
->spa_load_info
= loadinfo
;
3040 return (load_error
);
3047 * The import case is identical to an open except that the configuration is sent
3048 * down from userland, instead of grabbed from the configuration cache. For the
3049 * case of an open, the pool configuration will exist in the
3050 * POOL_STATE_UNINITIALIZED state.
3052 * The stats information (gen/count/ustats) is used to gather vdev statistics at
3053 * the same time open the pool, without having to keep around the spa_t in some
3057 spa_open_common(const char *pool
, spa_t
**spapp
, void *tag
, nvlist_t
*nvpolicy
,
3061 spa_load_state_t state
= SPA_LOAD_OPEN
;
3063 int locked
= B_FALSE
;
3068 * As disgusting as this is, we need to support recursive calls to this
3069 * function because dsl_dir_open() is called during spa_load(), and ends
3070 * up calling spa_open() again. The real fix is to figure out how to
3071 * avoid dsl_dir_open() calling this in the first place.
3073 if (mutex_owner(&spa_namespace_lock
) != curthread
) {
3074 mutex_enter(&spa_namespace_lock
);
3078 if ((spa
= spa_lookup(pool
)) == NULL
) {
3080 mutex_exit(&spa_namespace_lock
);
3081 return (SET_ERROR(ENOENT
));
3084 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
) {
3085 zpool_rewind_policy_t policy
;
3087 zpool_get_rewind_policy(nvpolicy
? nvpolicy
: spa
->spa_config
,
3089 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
3090 state
= SPA_LOAD_RECOVER
;
3092 spa_activate(spa
, spa_mode_global
);
3094 if (state
!= SPA_LOAD_RECOVER
)
3095 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
3097 error
= spa_load_best(spa
, state
, B_FALSE
, policy
.zrp_txg
,
3098 policy
.zrp_request
);
3100 if (error
== EBADF
) {
3102 * If vdev_validate() returns failure (indicated by
3103 * EBADF), it indicates that one of the vdevs indicates
3104 * that the pool has been exported or destroyed. If
3105 * this is the case, the config cache is out of sync and
3106 * we should remove the pool from the namespace.
3109 spa_deactivate(spa
);
3110 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
3113 mutex_exit(&spa_namespace_lock
);
3114 return (SET_ERROR(ENOENT
));
3119 * We can't open the pool, but we still have useful
3120 * information: the state of each vdev after the
3121 * attempted vdev_open(). Return this to the user.
3123 if (config
!= NULL
&& spa
->spa_config
) {
3124 VERIFY(nvlist_dup(spa
->spa_config
, config
,
3126 VERIFY(nvlist_add_nvlist(*config
,
3127 ZPOOL_CONFIG_LOAD_INFO
,
3128 spa
->spa_load_info
) == 0);
3131 spa_deactivate(spa
);
3132 spa
->spa_last_open_failed
= error
;
3134 mutex_exit(&spa_namespace_lock
);
3140 spa_open_ref(spa
, tag
);
3143 *config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
3146 * If we've recovered the pool, pass back any information we
3147 * gathered while doing the load.
3149 if (state
== SPA_LOAD_RECOVER
) {
3150 VERIFY(nvlist_add_nvlist(*config
, ZPOOL_CONFIG_LOAD_INFO
,
3151 spa
->spa_load_info
) == 0);
3155 spa
->spa_last_open_failed
= 0;
3156 spa
->spa_last_ubsync_txg
= 0;
3157 spa
->spa_load_txg
= 0;
3158 mutex_exit(&spa_namespace_lock
);
3167 spa_open_rewind(const char *name
, spa_t
**spapp
, void *tag
, nvlist_t
*policy
,
3170 return (spa_open_common(name
, spapp
, tag
, policy
, config
));
3174 spa_open(const char *name
, spa_t
**spapp
, void *tag
)
3176 return (spa_open_common(name
, spapp
, tag
, NULL
, NULL
));
3180 * Lookup the given spa_t, incrementing the inject count in the process,
3181 * preventing it from being exported or destroyed.
3184 spa_inject_addref(char *name
)
3188 mutex_enter(&spa_namespace_lock
);
3189 if ((spa
= spa_lookup(name
)) == NULL
) {
3190 mutex_exit(&spa_namespace_lock
);
3193 spa
->spa_inject_ref
++;
3194 mutex_exit(&spa_namespace_lock
);
3200 spa_inject_delref(spa_t
*spa
)
3202 mutex_enter(&spa_namespace_lock
);
3203 spa
->spa_inject_ref
--;
3204 mutex_exit(&spa_namespace_lock
);
3208 * Add spares device information to the nvlist.
3211 spa_add_spares(spa_t
*spa
, nvlist_t
*config
)
3221 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
3223 if (spa
->spa_spares
.sav_count
== 0)
3226 VERIFY(nvlist_lookup_nvlist(config
,
3227 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
3228 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
3229 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
3231 VERIFY(nvlist_add_nvlist_array(nvroot
,
3232 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3233 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
3234 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0);
3237 * Go through and find any spares which have since been
3238 * repurposed as an active spare. If this is the case, update
3239 * their status appropriately.
3241 for (i
= 0; i
< nspares
; i
++) {
3242 VERIFY(nvlist_lookup_uint64(spares
[i
],
3243 ZPOOL_CONFIG_GUID
, &guid
) == 0);
3244 if (spa_spare_exists(guid
, &pool
, NULL
) &&
3246 VERIFY(nvlist_lookup_uint64_array(
3247 spares
[i
], ZPOOL_CONFIG_VDEV_STATS
,
3248 (uint64_t **)&vs
, &vsc
) == 0);
3249 vs
->vs_state
= VDEV_STATE_CANT_OPEN
;
3250 vs
->vs_aux
= VDEV_AUX_SPARED
;
3257 * Add l2cache device information to the nvlist, including vdev stats.
3260 spa_add_l2cache(spa_t
*spa
, nvlist_t
*config
)
3263 uint_t i
, j
, nl2cache
;
3270 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
3272 if (spa
->spa_l2cache
.sav_count
== 0)
3275 VERIFY(nvlist_lookup_nvlist(config
,
3276 ZPOOL_CONFIG_VDEV_TREE
, &nvroot
) == 0);
3277 VERIFY(nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
3278 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
3279 if (nl2cache
!= 0) {
3280 VERIFY(nvlist_add_nvlist_array(nvroot
,
3281 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3282 VERIFY(nvlist_lookup_nvlist_array(nvroot
,
3283 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0);
3286 * Update level 2 cache device stats.
3289 for (i
= 0; i
< nl2cache
; i
++) {
3290 VERIFY(nvlist_lookup_uint64(l2cache
[i
],
3291 ZPOOL_CONFIG_GUID
, &guid
) == 0);
3294 for (j
= 0; j
< spa
->spa_l2cache
.sav_count
; j
++) {
3296 spa
->spa_l2cache
.sav_vdevs
[j
]->vdev_guid
) {
3297 vd
= spa
->spa_l2cache
.sav_vdevs
[j
];
3303 VERIFY(nvlist_lookup_uint64_array(l2cache
[i
],
3304 ZPOOL_CONFIG_VDEV_STATS
, (uint64_t **)&vs
, &vsc
)
3306 vdev_get_stats(vd
, vs
);
3312 spa_add_feature_stats(spa_t
*spa
, nvlist_t
*config
)
3318 ASSERT(spa_config_held(spa
, SCL_CONFIG
, RW_READER
));
3319 VERIFY(nvlist_alloc(&features
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3321 if (spa
->spa_feat_for_read_obj
!= 0) {
3322 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
3323 spa
->spa_feat_for_read_obj
);
3324 zap_cursor_retrieve(&zc
, &za
) == 0;
3325 zap_cursor_advance(&zc
)) {
3326 ASSERT(za
.za_integer_length
== sizeof (uint64_t) &&
3327 za
.za_num_integers
== 1);
3328 VERIFY3U(0, ==, nvlist_add_uint64(features
, za
.za_name
,
3329 za
.za_first_integer
));
3331 zap_cursor_fini(&zc
);
3334 if (spa
->spa_feat_for_write_obj
!= 0) {
3335 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
3336 spa
->spa_feat_for_write_obj
);
3337 zap_cursor_retrieve(&zc
, &za
) == 0;
3338 zap_cursor_advance(&zc
)) {
3339 ASSERT(za
.za_integer_length
== sizeof (uint64_t) &&
3340 za
.za_num_integers
== 1);
3341 VERIFY3U(0, ==, nvlist_add_uint64(features
, za
.za_name
,
3342 za
.za_first_integer
));
3344 zap_cursor_fini(&zc
);
3347 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_FEATURE_STATS
,
3349 nvlist_free(features
);
3353 spa_get_stats(const char *name
, nvlist_t
**config
,
3354 char *altroot
, size_t buflen
)
3360 error
= spa_open_common(name
, &spa
, FTAG
, NULL
, config
);
3364 * This still leaves a window of inconsistency where the spares
3365 * or l2cache devices could change and the config would be
3366 * self-inconsistent.
3368 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
3370 if (*config
!= NULL
) {
3371 uint64_t loadtimes
[2];
3373 loadtimes
[0] = spa
->spa_loaded_ts
.tv_sec
;
3374 loadtimes
[1] = spa
->spa_loaded_ts
.tv_nsec
;
3375 VERIFY(nvlist_add_uint64_array(*config
,
3376 ZPOOL_CONFIG_LOADED_TIME
, loadtimes
, 2) == 0);
3378 VERIFY(nvlist_add_uint64(*config
,
3379 ZPOOL_CONFIG_ERRCOUNT
,
3380 spa_get_errlog_size(spa
)) == 0);
3382 if (spa_suspended(spa
))
3383 VERIFY(nvlist_add_uint64(*config
,
3384 ZPOOL_CONFIG_SUSPENDED
,
3385 spa
->spa_failmode
) == 0);
3387 spa_add_spares(spa
, *config
);
3388 spa_add_l2cache(spa
, *config
);
3389 spa_add_feature_stats(spa
, *config
);
3394 * We want to get the alternate root even for faulted pools, so we cheat
3395 * and call spa_lookup() directly.
3399 mutex_enter(&spa_namespace_lock
);
3400 spa
= spa_lookup(name
);
3402 spa_altroot(spa
, altroot
, buflen
);
3406 mutex_exit(&spa_namespace_lock
);
3408 spa_altroot(spa
, altroot
, buflen
);
3413 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
3414 spa_close(spa
, FTAG
);
3421 * Validate that the auxiliary device array is well formed. We must have an
3422 * array of nvlists, each which describes a valid leaf vdev. If this is an
3423 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be
3424 * specified, as long as they are well-formed.
3427 spa_validate_aux_devs(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
,
3428 spa_aux_vdev_t
*sav
, const char *config
, uint64_t version
,
3429 vdev_labeltype_t label
)
3436 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
3439 * It's acceptable to have no devs specified.
3441 if (nvlist_lookup_nvlist_array(nvroot
, config
, &dev
, &ndev
) != 0)
3445 return (SET_ERROR(EINVAL
));
3448 * Make sure the pool is formatted with a version that supports this
3451 if (spa_version(spa
) < version
)
3452 return (SET_ERROR(ENOTSUP
));
3455 * Set the pending device list so we correctly handle device in-use
3458 sav
->sav_pending
= dev
;
3459 sav
->sav_npending
= ndev
;
3461 for (i
= 0; i
< ndev
; i
++) {
3462 if ((error
= spa_config_parse(spa
, &vd
, dev
[i
], NULL
, 0,
3466 if (!vd
->vdev_ops
->vdev_op_leaf
) {
3468 error
= SET_ERROR(EINVAL
);
3473 * The L2ARC currently only supports disk devices in
3474 * kernel context. For user-level testing, we allow it.
3477 if ((strcmp(config
, ZPOOL_CONFIG_L2CACHE
) == 0) &&
3478 strcmp(vd
->vdev_ops
->vdev_op_type
, VDEV_TYPE_DISK
) != 0) {
3479 error
= SET_ERROR(ENOTBLK
);
3486 if ((error
= vdev_open(vd
)) == 0 &&
3487 (error
= vdev_label_init(vd
, crtxg
, label
)) == 0) {
3488 VERIFY(nvlist_add_uint64(dev
[i
], ZPOOL_CONFIG_GUID
,
3489 vd
->vdev_guid
) == 0);
3495 (mode
!= VDEV_ALLOC_SPARE
&& mode
!= VDEV_ALLOC_L2CACHE
))
3502 sav
->sav_pending
= NULL
;
3503 sav
->sav_npending
= 0;
3508 spa_validate_aux(spa_t
*spa
, nvlist_t
*nvroot
, uint64_t crtxg
, int mode
)
3512 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
3514 if ((error
= spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
3515 &spa
->spa_spares
, ZPOOL_CONFIG_SPARES
, SPA_VERSION_SPARES
,
3516 VDEV_LABEL_SPARE
)) != 0) {
3520 return (spa_validate_aux_devs(spa
, nvroot
, crtxg
, mode
,
3521 &spa
->spa_l2cache
, ZPOOL_CONFIG_L2CACHE
, SPA_VERSION_L2CACHE
,
3522 VDEV_LABEL_L2CACHE
));
3526 spa_set_aux_vdevs(spa_aux_vdev_t
*sav
, nvlist_t
**devs
, int ndevs
,
3531 if (sav
->sav_config
!= NULL
) {
3537 * Generate new dev list by concatentating with the
3540 VERIFY(nvlist_lookup_nvlist_array(sav
->sav_config
, config
,
3541 &olddevs
, &oldndevs
) == 0);
3543 newdevs
= kmem_alloc(sizeof (void *) *
3544 (ndevs
+ oldndevs
), KM_SLEEP
);
3545 for (i
= 0; i
< oldndevs
; i
++)
3546 VERIFY(nvlist_dup(olddevs
[i
], &newdevs
[i
],
3548 for (i
= 0; i
< ndevs
; i
++)
3549 VERIFY(nvlist_dup(devs
[i
], &newdevs
[i
+ oldndevs
],
3552 VERIFY(nvlist_remove(sav
->sav_config
, config
,
3553 DATA_TYPE_NVLIST_ARRAY
) == 0);
3555 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
,
3556 config
, newdevs
, ndevs
+ oldndevs
) == 0);
3557 for (i
= 0; i
< oldndevs
+ ndevs
; i
++)
3558 nvlist_free(newdevs
[i
]);
3559 kmem_free(newdevs
, (oldndevs
+ ndevs
) * sizeof (void *));
3562 * Generate a new dev list.
3564 VERIFY(nvlist_alloc(&sav
->sav_config
, NV_UNIQUE_NAME
,
3566 VERIFY(nvlist_add_nvlist_array(sav
->sav_config
, config
,
3572 * Stop and drop level 2 ARC devices
3575 spa_l2cache_drop(spa_t
*spa
)
3579 spa_aux_vdev_t
*sav
= &spa
->spa_l2cache
;
3581 for (i
= 0; i
< sav
->sav_count
; i
++) {
3584 vd
= sav
->sav_vdevs
[i
];
3587 if (spa_l2cache_exists(vd
->vdev_guid
, &pool
) &&
3588 pool
!= 0ULL && l2arc_vdev_present(vd
))
3589 l2arc_remove_vdev(vd
);
3597 spa_create(const char *pool
, nvlist_t
*nvroot
, nvlist_t
*props
,
3601 char *altroot
= NULL
;
3606 uint64_t txg
= TXG_INITIAL
;
3607 nvlist_t
**spares
, **l2cache
;
3608 uint_t nspares
, nl2cache
;
3609 uint64_t version
, obj
;
3610 boolean_t has_features
;
3613 * If this pool already exists, return failure.
3615 mutex_enter(&spa_namespace_lock
);
3616 if (spa_lookup(pool
) != NULL
) {
3617 mutex_exit(&spa_namespace_lock
);
3618 return (SET_ERROR(EEXIST
));
3622 * Allocate a new spa_t structure.
3624 (void) nvlist_lookup_string(props
,
3625 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
3626 spa
= spa_add(pool
, NULL
, altroot
);
3627 spa_activate(spa
, spa_mode_global
);
3629 if (props
&& (error
= spa_prop_validate(spa
, props
))) {
3630 spa_deactivate(spa
);
3632 mutex_exit(&spa_namespace_lock
);
3636 has_features
= B_FALSE
;
3637 for (nvpair_t
*elem
= nvlist_next_nvpair(props
, NULL
);
3638 elem
!= NULL
; elem
= nvlist_next_nvpair(props
, elem
)) {
3639 if (zpool_prop_feature(nvpair_name(elem
)))
3640 has_features
= B_TRUE
;
3643 if (has_features
|| nvlist_lookup_uint64(props
,
3644 zpool_prop_to_name(ZPOOL_PROP_VERSION
), &version
) != 0) {
3645 version
= SPA_VERSION
;
3647 ASSERT(SPA_VERSION_IS_SUPPORTED(version
));
3649 spa
->spa_first_txg
= txg
;
3650 spa
->spa_uberblock
.ub_txg
= txg
- 1;
3651 spa
->spa_uberblock
.ub_version
= version
;
3652 spa
->spa_ubsync
= spa
->spa_uberblock
;
3653 spa
->spa_load_state
= SPA_LOAD_CREATE
;
3656 * Create "The Godfather" zio to hold all async IOs
3658 spa
->spa_async_zio_root
= kmem_alloc(max_ncpus
* sizeof (void *),
3660 for (int i
= 0; i
< max_ncpus
; i
++) {
3661 spa
->spa_async_zio_root
[i
] = zio_root(spa
, NULL
, NULL
,
3662 ZIO_FLAG_CANFAIL
| ZIO_FLAG_SPECULATIVE
|
3663 ZIO_FLAG_GODFATHER
);
3667 * Create the root vdev.
3669 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3671 error
= spa_config_parse(spa
, &rvd
, nvroot
, NULL
, 0, VDEV_ALLOC_ADD
);
3673 ASSERT(error
!= 0 || rvd
!= NULL
);
3674 ASSERT(error
!= 0 || spa
->spa_root_vdev
== rvd
);
3676 if (error
== 0 && !zfs_allocatable_devs(nvroot
))
3677 error
= SET_ERROR(EINVAL
);
3680 (error
= vdev_create(rvd
, txg
, B_FALSE
)) == 0 &&
3681 (error
= spa_validate_aux(spa
, nvroot
, txg
,
3682 VDEV_ALLOC_ADD
)) == 0) {
3683 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
3684 vdev_metaslab_set_size(rvd
->vdev_child
[c
]);
3685 vdev_expand(rvd
->vdev_child
[c
], txg
);
3689 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3693 spa_deactivate(spa
);
3695 mutex_exit(&spa_namespace_lock
);
3700 * Get the list of spares, if specified.
3702 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
3703 &spares
, &nspares
) == 0) {
3704 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
, NV_UNIQUE_NAME
,
3706 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
3707 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
3708 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3709 spa_load_spares(spa
);
3710 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3711 spa
->spa_spares
.sav_sync
= B_TRUE
;
3715 * Get the list of level 2 cache devices, if specified.
3717 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
3718 &l2cache
, &nl2cache
) == 0) {
3719 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
3720 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3721 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
3722 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
3723 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3724 spa_load_l2cache(spa
);
3725 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3726 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
3729 spa
->spa_is_initializing
= B_TRUE
;
3730 spa
->spa_dsl_pool
= dp
= dsl_pool_create(spa
, zplprops
, txg
);
3731 spa
->spa_meta_objset
= dp
->dp_meta_objset
;
3732 spa
->spa_is_initializing
= B_FALSE
;
3735 * Create DDTs (dedup tables).
3739 spa_update_dspace(spa
);
3741 tx
= dmu_tx_create_assigned(dp
, txg
);
3744 * Create the pool config object.
3746 spa
->spa_config_object
= dmu_object_alloc(spa
->spa_meta_objset
,
3747 DMU_OT_PACKED_NVLIST
, SPA_CONFIG_BLOCKSIZE
,
3748 DMU_OT_PACKED_NVLIST_SIZE
, sizeof (uint64_t), tx
);
3750 if (zap_add(spa
->spa_meta_objset
,
3751 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CONFIG
,
3752 sizeof (uint64_t), 1, &spa
->spa_config_object
, tx
) != 0) {
3753 cmn_err(CE_PANIC
, "failed to add pool config");
3756 if (spa_version(spa
) >= SPA_VERSION_FEATURES
)
3757 spa_feature_create_zap_objects(spa
, tx
);
3759 if (zap_add(spa
->spa_meta_objset
,
3760 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CREATION_VERSION
,
3761 sizeof (uint64_t), 1, &version
, tx
) != 0) {
3762 cmn_err(CE_PANIC
, "failed to add pool version");
3765 /* Newly created pools with the right version are always deflated. */
3766 if (version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
3767 spa
->spa_deflate
= TRUE
;
3768 if (zap_add(spa
->spa_meta_objset
,
3769 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
3770 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
) != 0) {
3771 cmn_err(CE_PANIC
, "failed to add deflate");
3776 * Create the deferred-free bpobj. Turn off compression
3777 * because sync-to-convergence takes longer if the blocksize
3780 obj
= bpobj_alloc(spa
->spa_meta_objset
, 1 << 14, tx
);
3781 dmu_object_set_compress(spa
->spa_meta_objset
, obj
,
3782 ZIO_COMPRESS_OFF
, tx
);
3783 if (zap_add(spa
->spa_meta_objset
,
3784 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_SYNC_BPOBJ
,
3785 sizeof (uint64_t), 1, &obj
, tx
) != 0) {
3786 cmn_err(CE_PANIC
, "failed to add bpobj");
3788 VERIFY3U(0, ==, bpobj_open(&spa
->spa_deferred_bpobj
,
3789 spa
->spa_meta_objset
, obj
));
3792 * Create the pool's history object.
3794 if (version
>= SPA_VERSION_ZPOOL_HISTORY
)
3795 spa_history_create_obj(spa
, tx
);
3798 * Generate some random noise for salted checksums to operate on.
3800 (void) random_get_pseudo_bytes(spa
->spa_cksum_salt
.zcs_bytes
,
3801 sizeof (spa
->spa_cksum_salt
.zcs_bytes
));
3804 * Set pool properties.
3806 spa
->spa_bootfs
= zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS
);
3807 spa
->spa_delegation
= zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION
);
3808 spa
->spa_failmode
= zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE
);
3809 spa
->spa_autoexpand
= zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND
);
3811 if (props
!= NULL
) {
3812 spa_configfile_set(spa
, props
, B_FALSE
);
3813 spa_sync_props(props
, tx
);
3818 spa
->spa_sync_on
= B_TRUE
;
3819 txg_sync_start(spa
->spa_dsl_pool
);
3822 * We explicitly wait for the first transaction to complete so that our
3823 * bean counters are appropriately updated.
3825 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
3827 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
3828 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_POOL_CREATE
);
3830 spa_history_log_version(spa
, "create");
3833 * Don't count references from objsets that are already closed
3834 * and are making their way through the eviction process.
3836 spa_evicting_os_wait(spa
);
3837 spa
->spa_minref
= refcount_count(&spa
->spa_refcount
);
3838 spa
->spa_load_state
= SPA_LOAD_NONE
;
3840 mutex_exit(&spa_namespace_lock
);
3847 * Get the root pool information from the root disk, then import the root pool
3848 * during the system boot up time.
3850 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t
**);
3853 spa_generate_rootconf(char *devpath
, char *devid
, uint64_t *guid
)
3856 nvlist_t
*nvtop
, *nvroot
;
3859 if (vdev_disk_read_rootlabel(devpath
, devid
, &config
) != 0)
3863 * Add this top-level vdev to the child array.
3865 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3867 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
3869 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_GUID
, guid
) == 0);
3872 * Put this pool's top-level vdevs into a root vdev.
3874 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
3875 VERIFY(nvlist_add_string(nvroot
, ZPOOL_CONFIG_TYPE
,
3876 VDEV_TYPE_ROOT
) == 0);
3877 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_ID
, 0ULL) == 0);
3878 VERIFY(nvlist_add_uint64(nvroot
, ZPOOL_CONFIG_GUID
, pgid
) == 0);
3879 VERIFY(nvlist_add_nvlist_array(nvroot
, ZPOOL_CONFIG_CHILDREN
,
3883 * Replace the existing vdev_tree with the new root vdev in
3884 * this pool's configuration (remove the old, add the new).
3886 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, nvroot
) == 0);
3887 nvlist_free(nvroot
);
3892 * Walk the vdev tree and see if we can find a device with "better"
3893 * configuration. A configuration is "better" if the label on that
3894 * device has a more recent txg.
3897 spa_alt_rootvdev(vdev_t
*vd
, vdev_t
**avd
, uint64_t *txg
)
3899 for (int c
= 0; c
< vd
->vdev_children
; c
++)
3900 spa_alt_rootvdev(vd
->vdev_child
[c
], avd
, txg
);
3902 if (vd
->vdev_ops
->vdev_op_leaf
) {
3906 if (vdev_disk_read_rootlabel(vd
->vdev_physpath
, vd
->vdev_devid
,
3910 VERIFY(nvlist_lookup_uint64(label
, ZPOOL_CONFIG_POOL_TXG
,
3914 * Do we have a better boot device?
3916 if (label_txg
> *txg
) {
3925 * Import a root pool.
3927 * For x86. devpath_list will consist of devid and/or physpath name of
3928 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a").
3929 * The GRUB "findroot" command will return the vdev we should boot.
3931 * For Sparc, devpath_list consists the physpath name of the booting device
3932 * no matter the rootpool is a single device pool or a mirrored pool.
3934 * "/pci@1f,0/ide@d/disk@0,0:a"
3937 spa_import_rootpool(char *devpath
, char *devid
)
3940 vdev_t
*rvd
, *bvd
, *avd
= NULL
;
3941 nvlist_t
*config
, *nvtop
;
3947 * Read the label from the boot device and generate a configuration.
3949 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3950 #if defined(_OBP) && defined(_KERNEL)
3951 if (config
== NULL
) {
3952 if (strstr(devpath
, "/iscsi/ssd") != NULL
) {
3954 get_iscsi_bootpath_phy(devpath
);
3955 config
= spa_generate_rootconf(devpath
, devid
, &guid
);
3959 if (config
== NULL
) {
3960 cmn_err(CE_NOTE
, "Cannot read the pool label from '%s'",
3962 return (SET_ERROR(EIO
));
3965 VERIFY(nvlist_lookup_string(config
, ZPOOL_CONFIG_POOL_NAME
,
3967 VERIFY(nvlist_lookup_uint64(config
, ZPOOL_CONFIG_POOL_TXG
, &txg
) == 0);
3969 mutex_enter(&spa_namespace_lock
);
3970 if ((spa
= spa_lookup(pname
)) != NULL
) {
3972 * Remove the existing root pool from the namespace so that we
3973 * can replace it with the correct config we just read in.
3978 spa
= spa_add(pname
, config
, NULL
);
3979 spa
->spa_is_root
= B_TRUE
;
3980 spa
->spa_import_flags
= ZFS_IMPORT_VERBATIM
;
3983 * Build up a vdev tree based on the boot device's label config.
3985 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
3987 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
3988 error
= spa_config_parse(spa
, &rvd
, nvtop
, NULL
, 0,
3989 VDEV_ALLOC_ROOTPOOL
);
3990 spa_config_exit(spa
, SCL_ALL
, FTAG
);
3992 mutex_exit(&spa_namespace_lock
);
3993 nvlist_free(config
);
3994 cmn_err(CE_NOTE
, "Can not parse the config for pool '%s'",
4000 * Get the boot vdev.
4002 if ((bvd
= vdev_lookup_by_guid(rvd
, guid
)) == NULL
) {
4003 cmn_err(CE_NOTE
, "Can not find the boot vdev for guid %llu",
4004 (u_longlong_t
)guid
);
4005 error
= SET_ERROR(ENOENT
);
4010 * Determine if there is a better boot device.
4013 spa_alt_rootvdev(rvd
, &avd
, &txg
);
4015 cmn_err(CE_NOTE
, "The boot device is 'degraded'. Please "
4016 "try booting from '%s'", avd
->vdev_path
);
4017 error
= SET_ERROR(EINVAL
);
4022 * If the boot device is part of a spare vdev then ensure that
4023 * we're booting off the active spare.
4025 if (bvd
->vdev_parent
->vdev_ops
== &vdev_spare_ops
&&
4026 !bvd
->vdev_isspare
) {
4027 cmn_err(CE_NOTE
, "The boot device is currently spared. Please "
4028 "try booting from '%s'",
4030 vdev_child
[bvd
->vdev_parent
->vdev_children
- 1]->vdev_path
);
4031 error
= SET_ERROR(EINVAL
);
4037 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4039 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4040 mutex_exit(&spa_namespace_lock
);
4042 nvlist_free(config
);
4049 * Import a non-root pool into the system.
4052 spa_import(const char *pool
, nvlist_t
*config
, nvlist_t
*props
, uint64_t flags
)
4055 char *altroot
= NULL
;
4056 spa_load_state_t state
= SPA_LOAD_IMPORT
;
4057 zpool_rewind_policy_t policy
;
4058 uint64_t mode
= spa_mode_global
;
4059 uint64_t readonly
= B_FALSE
;
4062 nvlist_t
**spares
, **l2cache
;
4063 uint_t nspares
, nl2cache
;
4066 * If a pool with this name exists, return failure.
4068 mutex_enter(&spa_namespace_lock
);
4069 if (spa_lookup(pool
) != NULL
) {
4070 mutex_exit(&spa_namespace_lock
);
4071 return (SET_ERROR(EEXIST
));
4075 * Create and initialize the spa structure.
4077 (void) nvlist_lookup_string(props
,
4078 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
4079 (void) nvlist_lookup_uint64(props
,
4080 zpool_prop_to_name(ZPOOL_PROP_READONLY
), &readonly
);
4083 spa
= spa_add(pool
, config
, altroot
);
4084 spa
->spa_import_flags
= flags
;
4087 * Verbatim import - Take a pool and insert it into the namespace
4088 * as if it had been loaded at boot.
4090 if (spa
->spa_import_flags
& ZFS_IMPORT_VERBATIM
) {
4092 spa_configfile_set(spa
, props
, B_FALSE
);
4094 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
4095 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_POOL_IMPORT
);
4097 mutex_exit(&spa_namespace_lock
);
4101 spa_activate(spa
, mode
);
4104 * Don't start async tasks until we know everything is healthy.
4106 spa_async_suspend(spa
);
4108 zpool_get_rewind_policy(config
, &policy
);
4109 if (policy
.zrp_request
& ZPOOL_DO_REWIND
)
4110 state
= SPA_LOAD_RECOVER
;
4113 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig
4114 * because the user-supplied config is actually the one to trust when
4117 if (state
!= SPA_LOAD_RECOVER
)
4118 spa
->spa_last_ubsync_txg
= spa
->spa_load_txg
= 0;
4120 error
= spa_load_best(spa
, state
, B_TRUE
, policy
.zrp_txg
,
4121 policy
.zrp_request
);
4124 * Propagate anything learned while loading the pool and pass it
4125 * back to caller (i.e. rewind info, missing devices, etc).
4127 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
4128 spa
->spa_load_info
) == 0);
4130 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4132 * Toss any existing sparelist, as it doesn't have any validity
4133 * anymore, and conflicts with spa_has_spare().
4135 if (spa
->spa_spares
.sav_config
) {
4136 nvlist_free(spa
->spa_spares
.sav_config
);
4137 spa
->spa_spares
.sav_config
= NULL
;
4138 spa_load_spares(spa
);
4140 if (spa
->spa_l2cache
.sav_config
) {
4141 nvlist_free(spa
->spa_l2cache
.sav_config
);
4142 spa
->spa_l2cache
.sav_config
= NULL
;
4143 spa_load_l2cache(spa
);
4146 VERIFY(nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
,
4149 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
4152 error
= spa_validate_aux(spa
, nvroot
, -1ULL,
4153 VDEV_ALLOC_L2CACHE
);
4154 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4157 spa_configfile_set(spa
, props
, B_FALSE
);
4159 if (error
!= 0 || (props
&& spa_writeable(spa
) &&
4160 (error
= spa_prop_set(spa
, props
)))) {
4162 spa_deactivate(spa
);
4164 mutex_exit(&spa_namespace_lock
);
4168 spa_async_resume(spa
);
4171 * Override any spares and level 2 cache devices as specified by
4172 * the user, as these may have correct device names/devids, etc.
4174 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
,
4175 &spares
, &nspares
) == 0) {
4176 if (spa
->spa_spares
.sav_config
)
4177 VERIFY(nvlist_remove(spa
->spa_spares
.sav_config
,
4178 ZPOOL_CONFIG_SPARES
, DATA_TYPE_NVLIST_ARRAY
) == 0);
4180 VERIFY(nvlist_alloc(&spa
->spa_spares
.sav_config
,
4181 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4182 VERIFY(nvlist_add_nvlist_array(spa
->spa_spares
.sav_config
,
4183 ZPOOL_CONFIG_SPARES
, spares
, nspares
) == 0);
4184 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4185 spa_load_spares(spa
);
4186 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4187 spa
->spa_spares
.sav_sync
= B_TRUE
;
4189 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
,
4190 &l2cache
, &nl2cache
) == 0) {
4191 if (spa
->spa_l2cache
.sav_config
)
4192 VERIFY(nvlist_remove(spa
->spa_l2cache
.sav_config
,
4193 ZPOOL_CONFIG_L2CACHE
, DATA_TYPE_NVLIST_ARRAY
) == 0);
4195 VERIFY(nvlist_alloc(&spa
->spa_l2cache
.sav_config
,
4196 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
4197 VERIFY(nvlist_add_nvlist_array(spa
->spa_l2cache
.sav_config
,
4198 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
) == 0);
4199 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4200 spa_load_l2cache(spa
);
4201 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4202 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4206 * Check for any removed devices.
4208 if (spa
->spa_autoreplace
) {
4209 spa_aux_check_removed(&spa
->spa_spares
);
4210 spa_aux_check_removed(&spa
->spa_l2cache
);
4213 if (spa_writeable(spa
)) {
4215 * Update the config cache to include the newly-imported pool.
4217 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
4221 * It's possible that the pool was expanded while it was exported.
4222 * We kick off an async task to handle this for us.
4224 spa_async_request(spa
, SPA_ASYNC_AUTOEXPAND
);
4226 spa_history_log_version(spa
, "import");
4228 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_POOL_IMPORT
);
4230 mutex_exit(&spa_namespace_lock
);
4236 spa_tryimport(nvlist_t
*tryconfig
)
4238 nvlist_t
*config
= NULL
;
4244 if (nvlist_lookup_string(tryconfig
, ZPOOL_CONFIG_POOL_NAME
, &poolname
))
4247 if (nvlist_lookup_uint64(tryconfig
, ZPOOL_CONFIG_POOL_STATE
, &state
))
4251 * Create and initialize the spa structure.
4253 mutex_enter(&spa_namespace_lock
);
4254 spa
= spa_add(TRYIMPORT_NAME
, tryconfig
, NULL
);
4255 spa_activate(spa
, FREAD
);
4258 * Pass off the heavy lifting to spa_load().
4259 * Pass TRUE for mosconfig because the user-supplied config
4260 * is actually the one to trust when doing an import.
4262 error
= spa_load(spa
, SPA_LOAD_TRYIMPORT
, SPA_IMPORT_EXISTING
, B_TRUE
);
4265 * If 'tryconfig' was at least parsable, return the current config.
4267 if (spa
->spa_root_vdev
!= NULL
) {
4268 config
= spa_config_generate(spa
, NULL
, -1ULL, B_TRUE
);
4269 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
,
4271 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
4273 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_TIMESTAMP
,
4274 spa
->spa_uberblock
.ub_timestamp
) == 0);
4275 VERIFY(nvlist_add_nvlist(config
, ZPOOL_CONFIG_LOAD_INFO
,
4276 spa
->spa_load_info
) == 0);
4279 * If the bootfs property exists on this pool then we
4280 * copy it out so that external consumers can tell which
4281 * pools are bootable.
4283 if ((!error
|| error
== EEXIST
) && spa
->spa_bootfs
) {
4284 char *tmpname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
4287 * We have to play games with the name since the
4288 * pool was opened as TRYIMPORT_NAME.
4290 if (dsl_dsobj_to_dsname(spa_name(spa
),
4291 spa
->spa_bootfs
, tmpname
) == 0) {
4293 char *dsname
= kmem_alloc(MAXPATHLEN
, KM_SLEEP
);
4295 cp
= strchr(tmpname
, '/');
4297 (void) strlcpy(dsname
, tmpname
,
4300 (void) snprintf(dsname
, MAXPATHLEN
,
4301 "%s/%s", poolname
, ++cp
);
4303 VERIFY(nvlist_add_string(config
,
4304 ZPOOL_CONFIG_BOOTFS
, dsname
) == 0);
4305 kmem_free(dsname
, MAXPATHLEN
);
4307 kmem_free(tmpname
, MAXPATHLEN
);
4311 * Add the list of hot spares and level 2 cache devices.
4313 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
4314 spa_add_spares(spa
, config
);
4315 spa_add_l2cache(spa
, config
);
4316 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
4320 spa_deactivate(spa
);
4322 mutex_exit(&spa_namespace_lock
);
4328 * Pool export/destroy
4330 * The act of destroying or exporting a pool is very simple. We make sure there
4331 * is no more pending I/O and any references to the pool are gone. Then, we
4332 * update the pool state and sync all the labels to disk, removing the
4333 * configuration from the cache afterwards. If the 'hardforce' flag is set, then
4334 * we don't sync the labels or remove the configuration cache.
4337 spa_export_common(char *pool
, int new_state
, nvlist_t
**oldconfig
,
4338 boolean_t force
, boolean_t hardforce
)
4345 if (!(spa_mode_global
& FWRITE
))
4346 return (SET_ERROR(EROFS
));
4348 mutex_enter(&spa_namespace_lock
);
4349 if ((spa
= spa_lookup(pool
)) == NULL
) {
4350 mutex_exit(&spa_namespace_lock
);
4351 return (SET_ERROR(ENOENT
));
4355 * Put a hold on the pool, drop the namespace lock, stop async tasks,
4356 * reacquire the namespace lock, and see if we can export.
4358 spa_open_ref(spa
, FTAG
);
4359 mutex_exit(&spa_namespace_lock
);
4360 spa_async_suspend(spa
);
4361 mutex_enter(&spa_namespace_lock
);
4362 spa_close(spa
, FTAG
);
4365 * The pool will be in core if it's openable,
4366 * in which case we can modify its state.
4368 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
&& spa
->spa_sync_on
) {
4370 * Objsets may be open only because they're dirty, so we
4371 * have to force it to sync before checking spa_refcnt.
4373 txg_wait_synced(spa
->spa_dsl_pool
, 0);
4374 spa_evicting_os_wait(spa
);
4377 * A pool cannot be exported or destroyed if there are active
4378 * references. If we are resetting a pool, allow references by
4379 * fault injection handlers.
4381 if (!spa_refcount_zero(spa
) ||
4382 (spa
->spa_inject_ref
!= 0 &&
4383 new_state
!= POOL_STATE_UNINITIALIZED
)) {
4384 spa_async_resume(spa
);
4385 mutex_exit(&spa_namespace_lock
);
4386 return (SET_ERROR(EBUSY
));
4390 * A pool cannot be exported if it has an active shared spare.
4391 * This is to prevent other pools stealing the active spare
4392 * from an exported pool. At user's own will, such pool can
4393 * be forcedly exported.
4395 if (!force
&& new_state
== POOL_STATE_EXPORTED
&&
4396 spa_has_active_shared_spare(spa
)) {
4397 spa_async_resume(spa
);
4398 mutex_exit(&spa_namespace_lock
);
4399 return (SET_ERROR(EXDEV
));
4403 * We want this to be reflected on every label,
4404 * so mark them all dirty. spa_unload() will do the
4405 * final sync that pushes these changes out.
4407 if (new_state
!= POOL_STATE_UNINITIALIZED
&& !hardforce
) {
4408 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
4409 spa
->spa_state
= new_state
;
4410 spa
->spa_final_txg
= spa_last_synced_txg(spa
) +
4412 vdev_config_dirty(spa
->spa_root_vdev
);
4413 spa_config_exit(spa
, SCL_ALL
, FTAG
);
4417 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_POOL_DESTROY
);
4419 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
4421 spa_deactivate(spa
);
4424 if (oldconfig
&& spa
->spa_config
)
4425 VERIFY(nvlist_dup(spa
->spa_config
, oldconfig
, 0) == 0);
4427 if (new_state
!= POOL_STATE_UNINITIALIZED
) {
4429 spa_config_sync(spa
, B_TRUE
, B_TRUE
);
4432 mutex_exit(&spa_namespace_lock
);
4438 * Destroy a storage pool.
4441 spa_destroy(char *pool
)
4443 return (spa_export_common(pool
, POOL_STATE_DESTROYED
, NULL
,
4448 * Export a storage pool.
4451 spa_export(char *pool
, nvlist_t
**oldconfig
, boolean_t force
,
4452 boolean_t hardforce
)
4454 return (spa_export_common(pool
, POOL_STATE_EXPORTED
, oldconfig
,
4459 * Similar to spa_export(), this unloads the spa_t without actually removing it
4460 * from the namespace in any way.
4463 spa_reset(char *pool
)
4465 return (spa_export_common(pool
, POOL_STATE_UNINITIALIZED
, NULL
,
4470 * ==========================================================================
4471 * Device manipulation
4472 * ==========================================================================
4476 * Add a device to a storage pool.
4479 spa_vdev_add(spa_t
*spa
, nvlist_t
*nvroot
)
4483 vdev_t
*rvd
= spa
->spa_root_vdev
;
4485 nvlist_t
**spares
, **l2cache
;
4486 uint_t nspares
, nl2cache
;
4488 ASSERT(spa_writeable(spa
));
4490 txg
= spa_vdev_enter(spa
);
4492 if ((error
= spa_config_parse(spa
, &vd
, nvroot
, NULL
, 0,
4493 VDEV_ALLOC_ADD
)) != 0)
4494 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
4496 spa
->spa_pending_vdev
= vd
; /* spa_vdev_exit() will clear this */
4498 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_SPARES
, &spares
,
4502 if (nvlist_lookup_nvlist_array(nvroot
, ZPOOL_CONFIG_L2CACHE
, &l2cache
,
4506 if (vd
->vdev_children
== 0 && nspares
== 0 && nl2cache
== 0)
4507 return (spa_vdev_exit(spa
, vd
, txg
, EINVAL
));
4509 if (vd
->vdev_children
!= 0 &&
4510 (error
= vdev_create(vd
, txg
, B_FALSE
)) != 0)
4511 return (spa_vdev_exit(spa
, vd
, txg
, error
));
4514 * We must validate the spares and l2cache devices after checking the
4515 * children. Otherwise, vdev_inuse() will blindly overwrite the spare.
4517 if ((error
= spa_validate_aux(spa
, nvroot
, txg
, VDEV_ALLOC_ADD
)) != 0)
4518 return (spa_vdev_exit(spa
, vd
, txg
, error
));
4521 * Transfer each new top-level vdev from vd to rvd.
4523 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
4526 * Set the vdev id to the first hole, if one exists.
4528 for (id
= 0; id
< rvd
->vdev_children
; id
++) {
4529 if (rvd
->vdev_child
[id
]->vdev_ishole
) {
4530 vdev_free(rvd
->vdev_child
[id
]);
4534 tvd
= vd
->vdev_child
[c
];
4535 vdev_remove_child(vd
, tvd
);
4537 vdev_add_child(rvd
, tvd
);
4538 vdev_config_dirty(tvd
);
4542 spa_set_aux_vdevs(&spa
->spa_spares
, spares
, nspares
,
4543 ZPOOL_CONFIG_SPARES
);
4544 spa_load_spares(spa
);
4545 spa
->spa_spares
.sav_sync
= B_TRUE
;
4548 if (nl2cache
!= 0) {
4549 spa_set_aux_vdevs(&spa
->spa_l2cache
, l2cache
, nl2cache
,
4550 ZPOOL_CONFIG_L2CACHE
);
4551 spa_load_l2cache(spa
);
4552 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
4556 * We have to be careful when adding new vdevs to an existing pool.
4557 * If other threads start allocating from these vdevs before we
4558 * sync the config cache, and we lose power, then upon reboot we may
4559 * fail to open the pool because there are DVAs that the config cache
4560 * can't translate. Therefore, we first add the vdevs without
4561 * initializing metaslabs; sync the config cache (via spa_vdev_exit());
4562 * and then let spa_config_update() initialize the new metaslabs.
4564 * spa_load() checks for added-but-not-initialized vdevs, so that
4565 * if we lose power at any point in this sequence, the remaining
4566 * steps will be completed the next time we load the pool.
4568 (void) spa_vdev_exit(spa
, vd
, txg
, 0);
4570 mutex_enter(&spa_namespace_lock
);
4571 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
4572 spa_event_notify(spa
, NULL
, NULL
, ESC_ZFS_VDEV_ADD
);
4573 mutex_exit(&spa_namespace_lock
);
4579 * Attach a device to a mirror. The arguments are the path to any device
4580 * in the mirror, and the nvroot for the new device. If the path specifies
4581 * a device that is not mirrored, we automatically insert the mirror vdev.
4583 * If 'replacing' is specified, the new device is intended to replace the
4584 * existing device; in this case the two devices are made into their own
4585 * mirror using the 'replacing' vdev, which is functionally identical to
4586 * the mirror vdev (it actually reuses all the same ops) but has a few
4587 * extra rules: you can't attach to it after it's been created, and upon
4588 * completion of resilvering, the first disk (the one being replaced)
4589 * is automatically detached.
4592 spa_vdev_attach(spa_t
*spa
, uint64_t guid
, nvlist_t
*nvroot
, int replacing
)
4594 uint64_t txg
, dtl_max_txg
;
4595 vdev_t
*rvd
= spa
->spa_root_vdev
;
4596 vdev_t
*oldvd
, *newvd
, *newrootvd
, *pvd
, *tvd
;
4598 char *oldvdpath
, *newvdpath
;
4602 ASSERT(spa_writeable(spa
));
4604 txg
= spa_vdev_enter(spa
);
4606 oldvd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4609 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4611 if (!oldvd
->vdev_ops
->vdev_op_leaf
)
4612 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4614 pvd
= oldvd
->vdev_parent
;
4616 if ((error
= spa_config_parse(spa
, &newrootvd
, nvroot
, NULL
, 0,
4617 VDEV_ALLOC_ATTACH
)) != 0)
4618 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
4620 if (newrootvd
->vdev_children
!= 1)
4621 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
4623 newvd
= newrootvd
->vdev_child
[0];
4625 if (!newvd
->vdev_ops
->vdev_op_leaf
)
4626 return (spa_vdev_exit(spa
, newrootvd
, txg
, EINVAL
));
4628 if ((error
= vdev_create(newrootvd
, txg
, replacing
)) != 0)
4629 return (spa_vdev_exit(spa
, newrootvd
, txg
, error
));
4632 * Spares can't replace logs
4634 if (oldvd
->vdev_top
->vdev_islog
&& newvd
->vdev_isspare
)
4635 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4639 * For attach, the only allowable parent is a mirror or the root
4642 if (pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4643 pvd
->vdev_ops
!= &vdev_root_ops
)
4644 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4646 pvops
= &vdev_mirror_ops
;
4649 * Active hot spares can only be replaced by inactive hot
4652 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4653 oldvd
->vdev_isspare
&&
4654 !spa_has_spare(spa
, newvd
->vdev_guid
))
4655 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4658 * If the source is a hot spare, and the parent isn't already a
4659 * spare, then we want to create a new hot spare. Otherwise, we
4660 * want to create a replacing vdev. The user is not allowed to
4661 * attach to a spared vdev child unless the 'isspare' state is
4662 * the same (spare replaces spare, non-spare replaces
4665 if (pvd
->vdev_ops
== &vdev_replacing_ops
&&
4666 spa_version(spa
) < SPA_VERSION_MULTI_REPLACE
) {
4667 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4668 } else if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4669 newvd
->vdev_isspare
!= oldvd
->vdev_isspare
) {
4670 return (spa_vdev_exit(spa
, newrootvd
, txg
, ENOTSUP
));
4673 if (newvd
->vdev_isspare
)
4674 pvops
= &vdev_spare_ops
;
4676 pvops
= &vdev_replacing_ops
;
4680 * Make sure the new device is big enough.
4682 if (newvd
->vdev_asize
< vdev_get_min_asize(oldvd
))
4683 return (spa_vdev_exit(spa
, newrootvd
, txg
, EOVERFLOW
));
4686 * The new device cannot have a higher alignment requirement
4687 * than the top-level vdev.
4689 if (newvd
->vdev_ashift
> oldvd
->vdev_top
->vdev_ashift
)
4690 return (spa_vdev_exit(spa
, newrootvd
, txg
, EDOM
));
4693 * If this is an in-place replacement, update oldvd's path and devid
4694 * to make it distinguishable from newvd, and unopenable from now on.
4696 if (strcmp(oldvd
->vdev_path
, newvd
->vdev_path
) == 0) {
4697 spa_strfree(oldvd
->vdev_path
);
4698 oldvd
->vdev_path
= kmem_alloc(strlen(newvd
->vdev_path
) + 5,
4700 (void) sprintf(oldvd
->vdev_path
, "%s/%s",
4701 newvd
->vdev_path
, "old");
4702 if (oldvd
->vdev_devid
!= NULL
) {
4703 spa_strfree(oldvd
->vdev_devid
);
4704 oldvd
->vdev_devid
= NULL
;
4708 /* mark the device being resilvered */
4709 newvd
->vdev_resilver_txg
= txg
;
4712 * If the parent is not a mirror, or if we're replacing, insert the new
4713 * mirror/replacing/spare vdev above oldvd.
4715 if (pvd
->vdev_ops
!= pvops
)
4716 pvd
= vdev_add_parent(oldvd
, pvops
);
4718 ASSERT(pvd
->vdev_top
->vdev_parent
== rvd
);
4719 ASSERT(pvd
->vdev_ops
== pvops
);
4720 ASSERT(oldvd
->vdev_parent
== pvd
);
4723 * Extract the new device from its root and add it to pvd.
4725 vdev_remove_child(newrootvd
, newvd
);
4726 newvd
->vdev_id
= pvd
->vdev_children
;
4727 newvd
->vdev_crtxg
= oldvd
->vdev_crtxg
;
4728 vdev_add_child(pvd
, newvd
);
4730 tvd
= newvd
->vdev_top
;
4731 ASSERT(pvd
->vdev_top
== tvd
);
4732 ASSERT(tvd
->vdev_parent
== rvd
);
4734 vdev_config_dirty(tvd
);
4737 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account
4738 * for any dmu_sync-ed blocks. It will propagate upward when
4739 * spa_vdev_exit() calls vdev_dtl_reassess().
4741 dtl_max_txg
= txg
+ TXG_CONCURRENT_STATES
;
4743 vdev_dtl_dirty(newvd
, DTL_MISSING
, TXG_INITIAL
,
4744 dtl_max_txg
- TXG_INITIAL
);
4746 if (newvd
->vdev_isspare
) {
4747 spa_spare_activate(newvd
);
4748 spa_event_notify(spa
, newvd
, NULL
, ESC_ZFS_VDEV_SPARE
);
4751 oldvdpath
= spa_strdup(oldvd
->vdev_path
);
4752 newvdpath
= spa_strdup(newvd
->vdev_path
);
4753 newvd_isspare
= newvd
->vdev_isspare
;
4756 * Mark newvd's DTL dirty in this txg.
4758 vdev_dirty(tvd
, VDD_DTL
, newvd
, txg
);
4761 * Schedule the resilver to restart in the future. We do this to
4762 * ensure that dmu_sync-ed blocks have been stitched into the
4763 * respective datasets.
4765 dsl_resilver_restart(spa
->spa_dsl_pool
, dtl_max_txg
);
4767 if (spa
->spa_bootfs
)
4768 spa_event_notify(spa
, newvd
, NULL
, ESC_ZFS_BOOTFS_VDEV_ATTACH
);
4770 spa_event_notify(spa
, newvd
, NULL
, ESC_ZFS_VDEV_ATTACH
);
4775 (void) spa_vdev_exit(spa
, newrootvd
, dtl_max_txg
, 0);
4777 spa_history_log_internal(spa
, "vdev attach", NULL
,
4778 "%s vdev=%s %s vdev=%s",
4779 replacing
&& newvd_isspare
? "spare in" :
4780 replacing
? "replace" : "attach", newvdpath
,
4781 replacing
? "for" : "to", oldvdpath
);
4783 spa_strfree(oldvdpath
);
4784 spa_strfree(newvdpath
);
4790 * Detach a device from a mirror or replacing vdev.
4792 * If 'replace_done' is specified, only detach if the parent
4793 * is a replacing vdev.
4796 spa_vdev_detach(spa_t
*spa
, uint64_t guid
, uint64_t pguid
, int replace_done
)
4800 vdev_t
*rvd
= spa
->spa_root_vdev
;
4801 vdev_t
*vd
, *pvd
, *cvd
, *tvd
;
4802 boolean_t unspare
= B_FALSE
;
4803 uint64_t unspare_guid
= 0;
4806 ASSERT(spa_writeable(spa
));
4808 txg
= spa_vdev_enter(spa
);
4810 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
4813 return (spa_vdev_exit(spa
, NULL
, txg
, ENODEV
));
4815 if (!vd
->vdev_ops
->vdev_op_leaf
)
4816 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4818 pvd
= vd
->vdev_parent
;
4821 * If the parent/child relationship is not as expected, don't do it.
4822 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing
4823 * vdev that's replacing B with C. The user's intent in replacing
4824 * is to go from M(A,B) to M(A,C). If the user decides to cancel
4825 * the replace by detaching C, the expected behavior is to end up
4826 * M(A,B). But suppose that right after deciding to detach C,
4827 * the replacement of B completes. We would have M(A,C), and then
4828 * ask to detach C, which would leave us with just A -- not what
4829 * the user wanted. To prevent this, we make sure that the
4830 * parent/child relationship hasn't changed -- in this example,
4831 * that C's parent is still the replacing vdev R.
4833 if (pvd
->vdev_guid
!= pguid
&& pguid
!= 0)
4834 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4837 * Only 'replacing' or 'spare' vdevs can be replaced.
4839 if (replace_done
&& pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4840 pvd
->vdev_ops
!= &vdev_spare_ops
)
4841 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4843 ASSERT(pvd
->vdev_ops
!= &vdev_spare_ops
||
4844 spa_version(spa
) >= SPA_VERSION_SPARES
);
4847 * Only mirror, replacing, and spare vdevs support detach.
4849 if (pvd
->vdev_ops
!= &vdev_replacing_ops
&&
4850 pvd
->vdev_ops
!= &vdev_mirror_ops
&&
4851 pvd
->vdev_ops
!= &vdev_spare_ops
)
4852 return (spa_vdev_exit(spa
, NULL
, txg
, ENOTSUP
));
4855 * If this device has the only valid copy of some data,
4856 * we cannot safely detach it.
4858 if (vdev_dtl_required(vd
))
4859 return (spa_vdev_exit(spa
, NULL
, txg
, EBUSY
));
4861 ASSERT(pvd
->vdev_children
>= 2);
4864 * If we are detaching the second disk from a replacing vdev, then
4865 * check to see if we changed the original vdev's path to have "/old"
4866 * at the end in spa_vdev_attach(). If so, undo that change now.
4868 if (pvd
->vdev_ops
== &vdev_replacing_ops
&& vd
->vdev_id
> 0 &&
4869 vd
->vdev_path
!= NULL
) {
4870 size_t len
= strlen(vd
->vdev_path
);
4872 for (int c
= 0; c
< pvd
->vdev_children
; c
++) {
4873 cvd
= pvd
->vdev_child
[c
];
4875 if (cvd
== vd
|| cvd
->vdev_path
== NULL
)
4878 if (strncmp(cvd
->vdev_path
, vd
->vdev_path
, len
) == 0 &&
4879 strcmp(cvd
->vdev_path
+ len
, "/old") == 0) {
4880 spa_strfree(cvd
->vdev_path
);
4881 cvd
->vdev_path
= spa_strdup(vd
->vdev_path
);
4888 * If we are detaching the original disk from a spare, then it implies
4889 * that the spare should become a real disk, and be removed from the
4890 * active spare list for the pool.
4892 if (pvd
->vdev_ops
== &vdev_spare_ops
&&
4894 pvd
->vdev_child
[pvd
->vdev_children
- 1]->vdev_isspare
)
4898 * Erase the disk labels so the disk can be used for other things.
4899 * This must be done after all other error cases are handled,
4900 * but before we disembowel vd (so we can still do I/O to it).
4901 * But if we can't do it, don't treat the error as fatal --
4902 * it may be that the unwritability of the disk is the reason
4903 * it's being detached!
4905 error
= vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
4908 * Remove vd from its parent and compact the parent's children.
4910 vdev_remove_child(pvd
, vd
);
4911 vdev_compact_children(pvd
);
4914 * Remember one of the remaining children so we can get tvd below.
4916 cvd
= pvd
->vdev_child
[pvd
->vdev_children
- 1];
4919 * If we need to remove the remaining child from the list of hot spares,
4920 * do it now, marking the vdev as no longer a spare in the process.
4921 * We must do this before vdev_remove_parent(), because that can
4922 * change the GUID if it creates a new toplevel GUID. For a similar
4923 * reason, we must remove the spare now, in the same txg as the detach;
4924 * otherwise someone could attach a new sibling, change the GUID, and
4925 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail.
4928 ASSERT(cvd
->vdev_isspare
);
4929 spa_spare_remove(cvd
);
4930 unspare_guid
= cvd
->vdev_guid
;
4931 (void) spa_vdev_remove(spa
, unspare_guid
, B_TRUE
);
4932 cvd
->vdev_unspare
= B_TRUE
;
4936 * If the parent mirror/replacing vdev only has one child,
4937 * the parent is no longer needed. Remove it from the tree.
4939 if (pvd
->vdev_children
== 1) {
4940 if (pvd
->vdev_ops
== &vdev_spare_ops
)
4941 cvd
->vdev_unspare
= B_FALSE
;
4942 vdev_remove_parent(cvd
);
4947 * We don't set tvd until now because the parent we just removed
4948 * may have been the previous top-level vdev.
4950 tvd
= cvd
->vdev_top
;
4951 ASSERT(tvd
->vdev_parent
== rvd
);
4954 * Reevaluate the parent vdev state.
4956 vdev_propagate_state(cvd
);
4959 * If the 'autoexpand' property is set on the pool then automatically
4960 * try to expand the size of the pool. For example if the device we
4961 * just detached was smaller than the others, it may be possible to
4962 * add metaslabs (i.e. grow the pool). We need to reopen the vdev
4963 * first so that we can obtain the updated sizes of the leaf vdevs.
4965 if (spa
->spa_autoexpand
) {
4967 vdev_expand(tvd
, txg
);
4970 vdev_config_dirty(tvd
);
4973 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that
4974 * vd->vdev_detached is set and free vd's DTL object in syncing context.
4975 * But first make sure we're not on any *other* txg's DTL list, to
4976 * prevent vd from being accessed after it's freed.
4978 vdpath
= spa_strdup(vd
->vdev_path
);
4979 for (int t
= 0; t
< TXG_SIZE
; t
++)
4980 (void) txg_list_remove_this(&tvd
->vdev_dtl_list
, vd
, t
);
4981 vd
->vdev_detached
= B_TRUE
;
4982 vdev_dirty(tvd
, VDD_DTL
, vd
, txg
);
4984 spa_event_notify(spa
, vd
, NULL
, ESC_ZFS_VDEV_REMOVE
);
4986 /* hang on to the spa before we release the lock */
4987 spa_open_ref(spa
, FTAG
);
4989 error
= spa_vdev_exit(spa
, vd
, txg
, 0);
4991 spa_history_log_internal(spa
, "detach", NULL
,
4993 spa_strfree(vdpath
);
4996 * If this was the removal of the original device in a hot spare vdev,
4997 * then we want to go through and remove the device from the hot spare
4998 * list of every other pool.
5001 spa_t
*altspa
= NULL
;
5003 mutex_enter(&spa_namespace_lock
);
5004 while ((altspa
= spa_next(altspa
)) != NULL
) {
5005 if (altspa
->spa_state
!= POOL_STATE_ACTIVE
||
5009 spa_open_ref(altspa
, FTAG
);
5010 mutex_exit(&spa_namespace_lock
);
5011 (void) spa_vdev_remove(altspa
, unspare_guid
, B_TRUE
);
5012 mutex_enter(&spa_namespace_lock
);
5013 spa_close(altspa
, FTAG
);
5015 mutex_exit(&spa_namespace_lock
);
5017 /* search the rest of the vdevs for spares to remove */
5018 spa_vdev_resilver_done(spa
);
5021 /* all done with the spa; OK to release */
5022 mutex_enter(&spa_namespace_lock
);
5023 spa_close(spa
, FTAG
);
5024 mutex_exit(&spa_namespace_lock
);
5030 * Split a set of devices from their mirrors, and create a new pool from them.
5033 spa_vdev_split_mirror(spa_t
*spa
, char *newname
, nvlist_t
*config
,
5034 nvlist_t
*props
, boolean_t exp
)
5037 uint64_t txg
, *glist
;
5039 uint_t c
, children
, lastlog
;
5040 nvlist_t
**child
, *nvl
, *tmp
;
5042 char *altroot
= NULL
;
5043 vdev_t
*rvd
, **vml
= NULL
; /* vdev modify list */
5044 boolean_t activate_slog
;
5046 ASSERT(spa_writeable(spa
));
5048 txg
= spa_vdev_enter(spa
);
5050 /* clear the log and flush everything up to now */
5051 activate_slog
= spa_passivate_log(spa
);
5052 (void) spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
5053 error
= spa_offline_log(spa
);
5054 txg
= spa_vdev_config_enter(spa
);
5057 spa_activate_log(spa
);
5060 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5062 /* check new spa name before going any further */
5063 if (spa_lookup(newname
) != NULL
)
5064 return (spa_vdev_exit(spa
, NULL
, txg
, EEXIST
));
5067 * scan through all the children to ensure they're all mirrors
5069 if (nvlist_lookup_nvlist(config
, ZPOOL_CONFIG_VDEV_TREE
, &nvl
) != 0 ||
5070 nvlist_lookup_nvlist_array(nvl
, ZPOOL_CONFIG_CHILDREN
, &child
,
5072 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
5074 /* first, check to ensure we've got the right child count */
5075 rvd
= spa
->spa_root_vdev
;
5077 for (c
= 0; c
< rvd
->vdev_children
; c
++) {
5078 vdev_t
*vd
= rvd
->vdev_child
[c
];
5080 /* don't count the holes & logs as children */
5081 if (vd
->vdev_islog
|| vd
->vdev_ishole
) {
5089 if (children
!= (lastlog
!= 0 ? lastlog
: rvd
->vdev_children
))
5090 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
5092 /* next, ensure no spare or cache devices are part of the split */
5093 if (nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_SPARES
, &tmp
) == 0 ||
5094 nvlist_lookup_nvlist(nvl
, ZPOOL_CONFIG_L2CACHE
, &tmp
) == 0)
5095 return (spa_vdev_exit(spa
, NULL
, txg
, EINVAL
));
5097 vml
= kmem_zalloc(children
* sizeof (vdev_t
*), KM_SLEEP
);
5098 glist
= kmem_zalloc(children
* sizeof (uint64_t), KM_SLEEP
);
5100 /* then, loop over each vdev and validate it */
5101 for (c
= 0; c
< children
; c
++) {
5102 uint64_t is_hole
= 0;
5104 (void) nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_IS_HOLE
,
5108 if (spa
->spa_root_vdev
->vdev_child
[c
]->vdev_ishole
||
5109 spa
->spa_root_vdev
->vdev_child
[c
]->vdev_islog
) {
5112 error
= SET_ERROR(EINVAL
);
5117 /* which disk is going to be split? */
5118 if (nvlist_lookup_uint64(child
[c
], ZPOOL_CONFIG_GUID
,
5120 error
= SET_ERROR(EINVAL
);
5124 /* look it up in the spa */
5125 vml
[c
] = spa_lookup_by_guid(spa
, glist
[c
], B_FALSE
);
5126 if (vml
[c
] == NULL
) {
5127 error
= SET_ERROR(ENODEV
);
5131 /* make sure there's nothing stopping the split */
5132 if (vml
[c
]->vdev_parent
->vdev_ops
!= &vdev_mirror_ops
||
5133 vml
[c
]->vdev_islog
||
5134 vml
[c
]->vdev_ishole
||
5135 vml
[c
]->vdev_isspare
||
5136 vml
[c
]->vdev_isl2cache
||
5137 !vdev_writeable(vml
[c
]) ||
5138 vml
[c
]->vdev_children
!= 0 ||
5139 vml
[c
]->vdev_state
!= VDEV_STATE_HEALTHY
||
5140 c
!= spa
->spa_root_vdev
->vdev_child
[c
]->vdev_id
) {
5141 error
= SET_ERROR(EINVAL
);
5145 if (vdev_dtl_required(vml
[c
])) {
5146 error
= SET_ERROR(EBUSY
);
5150 /* we need certain info from the top level */
5151 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_ARRAY
,
5152 vml
[c
]->vdev_top
->vdev_ms_array
) == 0);
5153 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_METASLAB_SHIFT
,
5154 vml
[c
]->vdev_top
->vdev_ms_shift
) == 0);
5155 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASIZE
,
5156 vml
[c
]->vdev_top
->vdev_asize
) == 0);
5157 VERIFY(nvlist_add_uint64(child
[c
], ZPOOL_CONFIG_ASHIFT
,
5158 vml
[c
]->vdev_top
->vdev_ashift
) == 0);
5160 /* transfer per-vdev ZAPs */
5161 ASSERT3U(vml
[c
]->vdev_leaf_zap
, !=, 0);
5162 VERIFY0(nvlist_add_uint64(child
[c
],
5163 ZPOOL_CONFIG_VDEV_LEAF_ZAP
, vml
[c
]->vdev_leaf_zap
));
5165 ASSERT3U(vml
[c
]->vdev_top
->vdev_top_zap
, !=, 0);
5166 VERIFY0(nvlist_add_uint64(child
[c
],
5167 ZPOOL_CONFIG_VDEV_TOP_ZAP
,
5168 vml
[c
]->vdev_parent
->vdev_top_zap
));
5172 kmem_free(vml
, children
* sizeof (vdev_t
*));
5173 kmem_free(glist
, children
* sizeof (uint64_t));
5174 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5177 /* stop writers from using the disks */
5178 for (c
= 0; c
< children
; c
++) {
5180 vml
[c
]->vdev_offline
= B_TRUE
;
5182 vdev_reopen(spa
->spa_root_vdev
);
5185 * Temporarily record the splitting vdevs in the spa config. This
5186 * will disappear once the config is regenerated.
5188 VERIFY(nvlist_alloc(&nvl
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5189 VERIFY(nvlist_add_uint64_array(nvl
, ZPOOL_CONFIG_SPLIT_LIST
,
5190 glist
, children
) == 0);
5191 kmem_free(glist
, children
* sizeof (uint64_t));
5193 mutex_enter(&spa
->spa_props_lock
);
5194 VERIFY(nvlist_add_nvlist(spa
->spa_config
, ZPOOL_CONFIG_SPLIT
,
5196 mutex_exit(&spa
->spa_props_lock
);
5197 spa
->spa_config_splitting
= nvl
;
5198 vdev_config_dirty(spa
->spa_root_vdev
);
5200 /* configure and create the new pool */
5201 VERIFY(nvlist_add_string(config
, ZPOOL_CONFIG_POOL_NAME
, newname
) == 0);
5202 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_STATE
,
5203 exp
? POOL_STATE_EXPORTED
: POOL_STATE_ACTIVE
) == 0);
5204 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
5205 spa_version(spa
)) == 0);
5206 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_TXG
,
5207 spa
->spa_config_txg
) == 0);
5208 VERIFY(nvlist_add_uint64(config
, ZPOOL_CONFIG_POOL_GUID
,
5209 spa_generate_guid(NULL
)) == 0);
5210 VERIFY0(nvlist_add_boolean(config
, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS
));
5211 (void) nvlist_lookup_string(props
,
5212 zpool_prop_to_name(ZPOOL_PROP_ALTROOT
), &altroot
);
5214 /* add the new pool to the namespace */
5215 newspa
= spa_add(newname
, config
, altroot
);
5216 newspa
->spa_avz_action
= AVZ_ACTION_REBUILD
;
5217 newspa
->spa_config_txg
= spa
->spa_config_txg
;
5218 spa_set_log_state(newspa
, SPA_LOG_CLEAR
);
5220 /* release the spa config lock, retaining the namespace lock */
5221 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
5223 if (zio_injection_enabled
)
5224 zio_handle_panic_injection(spa
, FTAG
, 1);
5226 spa_activate(newspa
, spa_mode_global
);
5227 spa_async_suspend(newspa
);
5229 /* create the new pool from the disks of the original pool */
5230 error
= spa_load(newspa
, SPA_LOAD_IMPORT
, SPA_IMPORT_ASSEMBLE
, B_TRUE
);
5234 /* if that worked, generate a real config for the new pool */
5235 if (newspa
->spa_root_vdev
!= NULL
) {
5236 VERIFY(nvlist_alloc(&newspa
->spa_config_splitting
,
5237 NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5238 VERIFY(nvlist_add_uint64(newspa
->spa_config_splitting
,
5239 ZPOOL_CONFIG_SPLIT_GUID
, spa_guid(spa
)) == 0);
5240 spa_config_set(newspa
, spa_config_generate(newspa
, NULL
, -1ULL,
5245 if (props
!= NULL
) {
5246 spa_configfile_set(newspa
, props
, B_FALSE
);
5247 error
= spa_prop_set(newspa
, props
);
5252 /* flush everything */
5253 txg
= spa_vdev_config_enter(newspa
);
5254 vdev_config_dirty(newspa
->spa_root_vdev
);
5255 (void) spa_vdev_config_exit(newspa
, NULL
, txg
, 0, FTAG
);
5257 if (zio_injection_enabled
)
5258 zio_handle_panic_injection(spa
, FTAG
, 2);
5260 spa_async_resume(newspa
);
5262 /* finally, update the original pool's config */
5263 txg
= spa_vdev_config_enter(spa
);
5264 tx
= dmu_tx_create_dd(spa_get_dsl(spa
)->dp_mos_dir
);
5265 error
= dmu_tx_assign(tx
, TXG_WAIT
);
5268 for (c
= 0; c
< children
; c
++) {
5269 if (vml
[c
] != NULL
) {
5272 spa_history_log_internal(spa
, "detach", tx
,
5273 "vdev=%s", vml
[c
]->vdev_path
);
5278 spa
->spa_avz_action
= AVZ_ACTION_REBUILD
;
5279 vdev_config_dirty(spa
->spa_root_vdev
);
5280 spa
->spa_config_splitting
= NULL
;
5284 (void) spa_vdev_exit(spa
, NULL
, txg
, 0);
5286 if (zio_injection_enabled
)
5287 zio_handle_panic_injection(spa
, FTAG
, 3);
5289 /* split is complete; log a history record */
5290 spa_history_log_internal(newspa
, "split", NULL
,
5291 "from pool %s", spa_name(spa
));
5293 kmem_free(vml
, children
* sizeof (vdev_t
*));
5295 /* if we're not going to mount the filesystems in userland, export */
5297 error
= spa_export_common(newname
, POOL_STATE_EXPORTED
, NULL
,
5304 spa_deactivate(newspa
);
5307 txg
= spa_vdev_config_enter(spa
);
5309 /* re-online all offlined disks */
5310 for (c
= 0; c
< children
; c
++) {
5312 vml
[c
]->vdev_offline
= B_FALSE
;
5314 vdev_reopen(spa
->spa_root_vdev
);
5316 nvlist_free(spa
->spa_config_splitting
);
5317 spa
->spa_config_splitting
= NULL
;
5318 (void) spa_vdev_exit(spa
, NULL
, txg
, error
);
5320 kmem_free(vml
, children
* sizeof (vdev_t
*));
5325 spa_nvlist_lookup_by_guid(nvlist_t
**nvpp
, int count
, uint64_t target_guid
)
5327 for (int i
= 0; i
< count
; i
++) {
5330 VERIFY(nvlist_lookup_uint64(nvpp
[i
], ZPOOL_CONFIG_GUID
,
5333 if (guid
== target_guid
)
5341 spa_vdev_remove_aux(nvlist_t
*config
, char *name
, nvlist_t
**dev
, int count
,
5342 nvlist_t
*dev_to_remove
)
5344 nvlist_t
**newdev
= NULL
;
5347 newdev
= kmem_alloc((count
- 1) * sizeof (void *), KM_SLEEP
);
5349 for (int i
= 0, j
= 0; i
< count
; i
++) {
5350 if (dev
[i
] == dev_to_remove
)
5352 VERIFY(nvlist_dup(dev
[i
], &newdev
[j
++], KM_SLEEP
) == 0);
5355 VERIFY(nvlist_remove(config
, name
, DATA_TYPE_NVLIST_ARRAY
) == 0);
5356 VERIFY(nvlist_add_nvlist_array(config
, name
, newdev
, count
- 1) == 0);
5358 for (int i
= 0; i
< count
- 1; i
++)
5359 nvlist_free(newdev
[i
]);
5362 kmem_free(newdev
, (count
- 1) * sizeof (void *));
5366 * Evacuate the device.
5369 spa_vdev_remove_evacuate(spa_t
*spa
, vdev_t
*vd
)
5374 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
5375 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5376 ASSERT(vd
== vd
->vdev_top
);
5379 * Evacuate the device. We don't hold the config lock as writer
5380 * since we need to do I/O but we do keep the
5381 * spa_namespace_lock held. Once this completes the device
5382 * should no longer have any blocks allocated on it.
5384 if (vd
->vdev_islog
) {
5385 if (vd
->vdev_stat
.vs_alloc
!= 0)
5386 error
= spa_offline_log(spa
);
5388 error
= SET_ERROR(ENOTSUP
);
5395 * The evacuation succeeded. Remove any remaining MOS metadata
5396 * associated with this vdev, and wait for these changes to sync.
5398 ASSERT0(vd
->vdev_stat
.vs_alloc
);
5399 txg
= spa_vdev_config_enter(spa
);
5400 vd
->vdev_removing
= B_TRUE
;
5401 vdev_dirty_leaves(vd
, VDD_DTL
, txg
);
5402 vdev_config_dirty(vd
);
5403 spa_vdev_config_exit(spa
, NULL
, txg
, 0, FTAG
);
5409 * Complete the removal by cleaning up the namespace.
5412 spa_vdev_remove_from_namespace(spa_t
*spa
, vdev_t
*vd
)
5414 vdev_t
*rvd
= spa
->spa_root_vdev
;
5415 uint64_t id
= vd
->vdev_id
;
5416 boolean_t last_vdev
= (id
== (rvd
->vdev_children
- 1));
5418 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
5419 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == SCL_ALL
);
5420 ASSERT(vd
== vd
->vdev_top
);
5423 * Only remove any devices which are empty.
5425 if (vd
->vdev_stat
.vs_alloc
!= 0)
5428 (void) vdev_label_init(vd
, 0, VDEV_LABEL_REMOVE
);
5430 if (list_link_active(&vd
->vdev_state_dirty_node
))
5431 vdev_state_clean(vd
);
5432 if (list_link_active(&vd
->vdev_config_dirty_node
))
5433 vdev_config_clean(vd
);
5438 vdev_compact_children(rvd
);
5440 vd
= vdev_alloc_common(spa
, id
, 0, &vdev_hole_ops
);
5441 vdev_add_child(rvd
, vd
);
5443 vdev_config_dirty(rvd
);
5446 * Reassess the health of our root vdev.
5452 * Remove a device from the pool -
5454 * Removing a device from the vdev namespace requires several steps
5455 * and can take a significant amount of time. As a result we use
5456 * the spa_vdev_config_[enter/exit] functions which allow us to
5457 * grab and release the spa_config_lock while still holding the namespace
5458 * lock. During each step the configuration is synced out.
5460 * Currently, this supports removing only hot spares, slogs, and level 2 ARC
5464 spa_vdev_remove(spa_t
*spa
, uint64_t guid
, boolean_t unspare
)
5467 sysevent_t
*ev
= NULL
;
5468 metaslab_group_t
*mg
;
5469 nvlist_t
**spares
, **l2cache
, *nv
;
5471 uint_t nspares
, nl2cache
;
5473 boolean_t locked
= MUTEX_HELD(&spa_namespace_lock
);
5475 ASSERT(spa_writeable(spa
));
5478 txg
= spa_vdev_enter(spa
);
5480 vd
= spa_lookup_by_guid(spa
, guid
, B_FALSE
);
5482 if (spa
->spa_spares
.sav_vdevs
!= NULL
&&
5483 nvlist_lookup_nvlist_array(spa
->spa_spares
.sav_config
,
5484 ZPOOL_CONFIG_SPARES
, &spares
, &nspares
) == 0 &&
5485 (nv
= spa_nvlist_lookup_by_guid(spares
, nspares
, guid
)) != NULL
) {
5487 * Only remove the hot spare if it's not currently in use
5490 if (vd
== NULL
|| unspare
) {
5492 vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
);
5493 ev
= spa_event_create(spa
, vd
, NULL
,
5494 ESC_ZFS_VDEV_REMOVE_AUX
);
5495 spa_vdev_remove_aux(spa
->spa_spares
.sav_config
,
5496 ZPOOL_CONFIG_SPARES
, spares
, nspares
, nv
);
5497 spa_load_spares(spa
);
5498 spa
->spa_spares
.sav_sync
= B_TRUE
;
5500 error
= SET_ERROR(EBUSY
);
5502 } else if (spa
->spa_l2cache
.sav_vdevs
!= NULL
&&
5503 nvlist_lookup_nvlist_array(spa
->spa_l2cache
.sav_config
,
5504 ZPOOL_CONFIG_L2CACHE
, &l2cache
, &nl2cache
) == 0 &&
5505 (nv
= spa_nvlist_lookup_by_guid(l2cache
, nl2cache
, guid
)) != NULL
) {
5507 * Cache devices can always be removed.
5509 vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
);
5510 ev
= spa_event_create(spa
, vd
, NULL
, ESC_ZFS_VDEV_REMOVE_AUX
);
5511 spa_vdev_remove_aux(spa
->spa_l2cache
.sav_config
,
5512 ZPOOL_CONFIG_L2CACHE
, l2cache
, nl2cache
, nv
);
5513 spa_load_l2cache(spa
);
5514 spa
->spa_l2cache
.sav_sync
= B_TRUE
;
5515 } else if (vd
!= NULL
&& vd
->vdev_islog
) {
5517 ASSERT(vd
== vd
->vdev_top
);
5522 * Stop allocating from this vdev.
5524 metaslab_group_passivate(mg
);
5527 * Wait for the youngest allocations and frees to sync,
5528 * and then wait for the deferral of those frees to finish.
5530 spa_vdev_config_exit(spa
, NULL
,
5531 txg
+ TXG_CONCURRENT_STATES
+ TXG_DEFER_SIZE
, 0, FTAG
);
5534 * Attempt to evacuate the vdev.
5536 error
= spa_vdev_remove_evacuate(spa
, vd
);
5538 txg
= spa_vdev_config_enter(spa
);
5541 * If we couldn't evacuate the vdev, unwind.
5544 metaslab_group_activate(mg
);
5545 return (spa_vdev_exit(spa
, NULL
, txg
, error
));
5549 * Clean up the vdev namespace.
5551 ev
= spa_event_create(spa
, vd
, NULL
, ESC_ZFS_VDEV_REMOVE_DEV
);
5552 spa_vdev_remove_from_namespace(spa
, vd
);
5554 } else if (vd
!= NULL
) {
5556 * Normal vdevs cannot be removed (yet).
5558 error
= SET_ERROR(ENOTSUP
);
5561 * There is no vdev of any kind with the specified guid.
5563 error
= SET_ERROR(ENOENT
);
5567 error
= spa_vdev_exit(spa
, NULL
, txg
, error
);
5576 * Find any device that's done replacing, or a vdev marked 'unspare' that's
5577 * currently spared, so we can detach it.
5580 spa_vdev_resilver_done_hunt(vdev_t
*vd
)
5582 vdev_t
*newvd
, *oldvd
;
5584 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
5585 oldvd
= spa_vdev_resilver_done_hunt(vd
->vdev_child
[c
]);
5591 * Check for a completed replacement. We always consider the first
5592 * vdev in the list to be the oldest vdev, and the last one to be
5593 * the newest (see spa_vdev_attach() for how that works). In
5594 * the case where the newest vdev is faulted, we will not automatically
5595 * remove it after a resilver completes. This is OK as it will require
5596 * user intervention to determine which disk the admin wishes to keep.
5598 if (vd
->vdev_ops
== &vdev_replacing_ops
) {
5599 ASSERT(vd
->vdev_children
> 1);
5601 newvd
= vd
->vdev_child
[vd
->vdev_children
- 1];
5602 oldvd
= vd
->vdev_child
[0];
5604 if (vdev_dtl_empty(newvd
, DTL_MISSING
) &&
5605 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
5606 !vdev_dtl_required(oldvd
))
5611 * Check for a completed resilver with the 'unspare' flag set.
5613 if (vd
->vdev_ops
== &vdev_spare_ops
) {
5614 vdev_t
*first
= vd
->vdev_child
[0];
5615 vdev_t
*last
= vd
->vdev_child
[vd
->vdev_children
- 1];
5617 if (last
->vdev_unspare
) {
5620 } else if (first
->vdev_unspare
) {
5627 if (oldvd
!= NULL
&&
5628 vdev_dtl_empty(newvd
, DTL_MISSING
) &&
5629 vdev_dtl_empty(newvd
, DTL_OUTAGE
) &&
5630 !vdev_dtl_required(oldvd
))
5634 * If there are more than two spares attached to a disk,
5635 * and those spares are not required, then we want to
5636 * attempt to free them up now so that they can be used
5637 * by other pools. Once we're back down to a single
5638 * disk+spare, we stop removing them.
5640 if (vd
->vdev_children
> 2) {
5641 newvd
= vd
->vdev_child
[1];
5643 if (newvd
->vdev_isspare
&& last
->vdev_isspare
&&
5644 vdev_dtl_empty(last
, DTL_MISSING
) &&
5645 vdev_dtl_empty(last
, DTL_OUTAGE
) &&
5646 !vdev_dtl_required(newvd
))
5655 spa_vdev_resilver_done(spa_t
*spa
)
5657 vdev_t
*vd
, *pvd
, *ppvd
;
5658 uint64_t guid
, sguid
, pguid
, ppguid
;
5660 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5662 while ((vd
= spa_vdev_resilver_done_hunt(spa
->spa_root_vdev
)) != NULL
) {
5663 pvd
= vd
->vdev_parent
;
5664 ppvd
= pvd
->vdev_parent
;
5665 guid
= vd
->vdev_guid
;
5666 pguid
= pvd
->vdev_guid
;
5667 ppguid
= ppvd
->vdev_guid
;
5670 * If we have just finished replacing a hot spared device, then
5671 * we need to detach the parent's first child (the original hot
5674 if (ppvd
->vdev_ops
== &vdev_spare_ops
&& pvd
->vdev_id
== 0 &&
5675 ppvd
->vdev_children
== 2) {
5676 ASSERT(pvd
->vdev_ops
== &vdev_replacing_ops
);
5677 sguid
= ppvd
->vdev_child
[1]->vdev_guid
;
5679 ASSERT(vd
->vdev_resilver_txg
== 0 || !vdev_dtl_required(vd
));
5681 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5682 if (spa_vdev_detach(spa
, guid
, pguid
, B_TRUE
) != 0)
5684 if (sguid
&& spa_vdev_detach(spa
, sguid
, ppguid
, B_TRUE
) != 0)
5686 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
5689 spa_config_exit(spa
, SCL_ALL
, FTAG
);
5693 * Update the stored path or FRU for this vdev.
5696 spa_vdev_set_common(spa_t
*spa
, uint64_t guid
, const char *value
,
5700 boolean_t sync
= B_FALSE
;
5702 ASSERT(spa_writeable(spa
));
5704 spa_vdev_state_enter(spa
, SCL_ALL
);
5706 if ((vd
= spa_lookup_by_guid(spa
, guid
, B_TRUE
)) == NULL
)
5707 return (spa_vdev_state_exit(spa
, NULL
, ENOENT
));
5709 if (!vd
->vdev_ops
->vdev_op_leaf
)
5710 return (spa_vdev_state_exit(spa
, NULL
, ENOTSUP
));
5713 if (strcmp(value
, vd
->vdev_path
) != 0) {
5714 spa_strfree(vd
->vdev_path
);
5715 vd
->vdev_path
= spa_strdup(value
);
5719 if (vd
->vdev_fru
== NULL
) {
5720 vd
->vdev_fru
= spa_strdup(value
);
5722 } else if (strcmp(value
, vd
->vdev_fru
) != 0) {
5723 spa_strfree(vd
->vdev_fru
);
5724 vd
->vdev_fru
= spa_strdup(value
);
5729 return (spa_vdev_state_exit(spa
, sync
? vd
: NULL
, 0));
5733 spa_vdev_setpath(spa_t
*spa
, uint64_t guid
, const char *newpath
)
5735 return (spa_vdev_set_common(spa
, guid
, newpath
, B_TRUE
));
5739 spa_vdev_setfru(spa_t
*spa
, uint64_t guid
, const char *newfru
)
5741 return (spa_vdev_set_common(spa
, guid
, newfru
, B_FALSE
));
5745 * ==========================================================================
5747 * ==========================================================================
5751 spa_scan_stop(spa_t
*spa
)
5753 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5754 if (dsl_scan_resilvering(spa
->spa_dsl_pool
))
5755 return (SET_ERROR(EBUSY
));
5756 return (dsl_scan_cancel(spa
->spa_dsl_pool
));
5760 spa_scan(spa_t
*spa
, pool_scan_func_t func
)
5762 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_WRITER
) == 0);
5764 if (func
>= POOL_SCAN_FUNCS
|| func
== POOL_SCAN_NONE
)
5765 return (SET_ERROR(ENOTSUP
));
5768 * If a resilver was requested, but there is no DTL on a
5769 * writeable leaf device, we have nothing to do.
5771 if (func
== POOL_SCAN_RESILVER
&&
5772 !vdev_resilver_needed(spa
->spa_root_vdev
, NULL
, NULL
)) {
5773 spa_async_request(spa
, SPA_ASYNC_RESILVER_DONE
);
5777 return (dsl_scan(spa
->spa_dsl_pool
, func
));
5781 * ==========================================================================
5782 * SPA async task processing
5783 * ==========================================================================
5787 spa_async_remove(spa_t
*spa
, vdev_t
*vd
)
5789 if (vd
->vdev_remove_wanted
) {
5790 vd
->vdev_remove_wanted
= B_FALSE
;
5791 vd
->vdev_delayed_close
= B_FALSE
;
5792 vdev_set_state(vd
, B_FALSE
, VDEV_STATE_REMOVED
, VDEV_AUX_NONE
);
5795 * We want to clear the stats, but we don't want to do a full
5796 * vdev_clear() as that will cause us to throw away
5797 * degraded/faulted state as well as attempt to reopen the
5798 * device, all of which is a waste.
5800 vd
->vdev_stat
.vs_read_errors
= 0;
5801 vd
->vdev_stat
.vs_write_errors
= 0;
5802 vd
->vdev_stat
.vs_checksum_errors
= 0;
5804 vdev_state_dirty(vd
->vdev_top
);
5807 for (int c
= 0; c
< vd
->vdev_children
; c
++)
5808 spa_async_remove(spa
, vd
->vdev_child
[c
]);
5812 spa_async_probe(spa_t
*spa
, vdev_t
*vd
)
5814 if (vd
->vdev_probe_wanted
) {
5815 vd
->vdev_probe_wanted
= B_FALSE
;
5816 vdev_reopen(vd
); /* vdev_open() does the actual probe */
5819 for (int c
= 0; c
< vd
->vdev_children
; c
++)
5820 spa_async_probe(spa
, vd
->vdev_child
[c
]);
5824 spa_async_autoexpand(spa_t
*spa
, vdev_t
*vd
)
5830 if (!spa
->spa_autoexpand
)
5833 for (int c
= 0; c
< vd
->vdev_children
; c
++) {
5834 vdev_t
*cvd
= vd
->vdev_child
[c
];
5835 spa_async_autoexpand(spa
, cvd
);
5838 if (!vd
->vdev_ops
->vdev_op_leaf
|| vd
->vdev_physpath
== NULL
)
5841 physpath
= kmem_zalloc(MAXPATHLEN
, KM_SLEEP
);
5842 (void) snprintf(physpath
, MAXPATHLEN
, "/devices%s", vd
->vdev_physpath
);
5844 VERIFY(nvlist_alloc(&attr
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
5845 VERIFY(nvlist_add_string(attr
, DEV_PHYS_PATH
, physpath
) == 0);
5847 (void) ddi_log_sysevent(zfs_dip
, SUNW_VENDOR
, EC_DEV_STATUS
,
5848 ESC_DEV_DLE
, attr
, &eid
, DDI_SLEEP
);
5851 kmem_free(physpath
, MAXPATHLEN
);
5855 spa_async_thread(spa_t
*spa
)
5859 ASSERT(spa
->spa_sync_on
);
5861 mutex_enter(&spa
->spa_async_lock
);
5862 tasks
= spa
->spa_async_tasks
;
5863 spa
->spa_async_tasks
= 0;
5864 mutex_exit(&spa
->spa_async_lock
);
5867 * See if the config needs to be updated.
5869 if (tasks
& SPA_ASYNC_CONFIG_UPDATE
) {
5870 uint64_t old_space
, new_space
;
5872 mutex_enter(&spa_namespace_lock
);
5873 old_space
= metaslab_class_get_space(spa_normal_class(spa
));
5874 spa_config_update(spa
, SPA_CONFIG_UPDATE_POOL
);
5875 new_space
= metaslab_class_get_space(spa_normal_class(spa
));
5876 mutex_exit(&spa_namespace_lock
);
5879 * If the pool grew as a result of the config update,
5880 * then log an internal history event.
5882 if (new_space
!= old_space
) {
5883 spa_history_log_internal(spa
, "vdev online", NULL
,
5884 "pool '%s' size: %llu(+%llu)",
5885 spa_name(spa
), new_space
, new_space
- old_space
);
5890 * See if any devices need to be marked REMOVED.
5892 if (tasks
& SPA_ASYNC_REMOVE
) {
5893 spa_vdev_state_enter(spa
, SCL_NONE
);
5894 spa_async_remove(spa
, spa
->spa_root_vdev
);
5895 for (int i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++)
5896 spa_async_remove(spa
, spa
->spa_l2cache
.sav_vdevs
[i
]);
5897 for (int i
= 0; i
< spa
->spa_spares
.sav_count
; i
++)
5898 spa_async_remove(spa
, spa
->spa_spares
.sav_vdevs
[i
]);
5899 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5902 if ((tasks
& SPA_ASYNC_AUTOEXPAND
) && !spa_suspended(spa
)) {
5903 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
5904 spa_async_autoexpand(spa
, spa
->spa_root_vdev
);
5905 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
5909 * See if any devices need to be probed.
5911 if (tasks
& SPA_ASYNC_PROBE
) {
5912 spa_vdev_state_enter(spa
, SCL_NONE
);
5913 spa_async_probe(spa
, spa
->spa_root_vdev
);
5914 (void) spa_vdev_state_exit(spa
, NULL
, 0);
5918 * If any devices are done replacing, detach them.
5920 if (tasks
& SPA_ASYNC_RESILVER_DONE
)
5921 spa_vdev_resilver_done(spa
);
5924 * Kick off a resilver.
5926 if (tasks
& SPA_ASYNC_RESILVER
)
5927 dsl_resilver_restart(spa
->spa_dsl_pool
, 0);
5930 * Let the world know that we're done.
5932 mutex_enter(&spa
->spa_async_lock
);
5933 spa
->spa_async_thread
= NULL
;
5934 cv_broadcast(&spa
->spa_async_cv
);
5935 mutex_exit(&spa
->spa_async_lock
);
5940 spa_async_suspend(spa_t
*spa
)
5942 mutex_enter(&spa
->spa_async_lock
);
5943 spa
->spa_async_suspended
++;
5944 while (spa
->spa_async_thread
!= NULL
)
5945 cv_wait(&spa
->spa_async_cv
, &spa
->spa_async_lock
);
5946 mutex_exit(&spa
->spa_async_lock
);
5950 spa_async_resume(spa_t
*spa
)
5952 mutex_enter(&spa
->spa_async_lock
);
5953 ASSERT(spa
->spa_async_suspended
!= 0);
5954 spa
->spa_async_suspended
--;
5955 mutex_exit(&spa
->spa_async_lock
);
5959 spa_async_tasks_pending(spa_t
*spa
)
5961 uint_t non_config_tasks
;
5963 boolean_t config_task_suspended
;
5965 non_config_tasks
= spa
->spa_async_tasks
& ~SPA_ASYNC_CONFIG_UPDATE
;
5966 config_task
= spa
->spa_async_tasks
& SPA_ASYNC_CONFIG_UPDATE
;
5967 if (spa
->spa_ccw_fail_time
== 0) {
5968 config_task_suspended
= B_FALSE
;
5970 config_task_suspended
=
5971 (gethrtime() - spa
->spa_ccw_fail_time
) <
5972 (zfs_ccw_retry_interval
* NANOSEC
);
5975 return (non_config_tasks
|| (config_task
&& !config_task_suspended
));
5979 spa_async_dispatch(spa_t
*spa
)
5981 mutex_enter(&spa
->spa_async_lock
);
5982 if (spa_async_tasks_pending(spa
) &&
5983 !spa
->spa_async_suspended
&&
5984 spa
->spa_async_thread
== NULL
&&
5986 spa
->spa_async_thread
= thread_create(NULL
, 0,
5987 spa_async_thread
, spa
, 0, &p0
, TS_RUN
, maxclsyspri
);
5988 mutex_exit(&spa
->spa_async_lock
);
5992 spa_async_request(spa_t
*spa
, int task
)
5994 zfs_dbgmsg("spa=%s async request task=%u", spa
->spa_name
, task
);
5995 mutex_enter(&spa
->spa_async_lock
);
5996 spa
->spa_async_tasks
|= task
;
5997 mutex_exit(&spa
->spa_async_lock
);
6001 * ==========================================================================
6002 * SPA syncing routines
6003 * ==========================================================================
6007 bpobj_enqueue_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
6010 bpobj_enqueue(bpo
, bp
, tx
);
6015 spa_free_sync_cb(void *arg
, const blkptr_t
*bp
, dmu_tx_t
*tx
)
6019 zio_nowait(zio_free_sync(zio
, zio
->io_spa
, dmu_tx_get_txg(tx
), bp
,
6025 * Note: this simple function is not inlined to make it easier to dtrace the
6026 * amount of time spent syncing frees.
6029 spa_sync_frees(spa_t
*spa
, bplist_t
*bpl
, dmu_tx_t
*tx
)
6031 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
6032 bplist_iterate(bpl
, spa_free_sync_cb
, zio
, tx
);
6033 VERIFY(zio_wait(zio
) == 0);
6037 * Note: this simple function is not inlined to make it easier to dtrace the
6038 * amount of time spent syncing deferred frees.
6041 spa_sync_deferred_frees(spa_t
*spa
, dmu_tx_t
*tx
)
6043 zio_t
*zio
= zio_root(spa
, NULL
, NULL
, 0);
6044 VERIFY3U(bpobj_iterate(&spa
->spa_deferred_bpobj
,
6045 spa_free_sync_cb
, zio
, tx
), ==, 0);
6046 VERIFY0(zio_wait(zio
));
6051 spa_sync_nvlist(spa_t
*spa
, uint64_t obj
, nvlist_t
*nv
, dmu_tx_t
*tx
)
6053 char *packed
= NULL
;
6058 VERIFY(nvlist_size(nv
, &nvsize
, NV_ENCODE_XDR
) == 0);
6061 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration
6062 * information. This avoids the dmu_buf_will_dirty() path and
6063 * saves us a pre-read to get data we don't actually care about.
6065 bufsize
= P2ROUNDUP((uint64_t)nvsize
, SPA_CONFIG_BLOCKSIZE
);
6066 packed
= kmem_alloc(bufsize
, KM_SLEEP
);
6068 VERIFY(nvlist_pack(nv
, &packed
, &nvsize
, NV_ENCODE_XDR
,
6070 bzero(packed
+ nvsize
, bufsize
- nvsize
);
6072 dmu_write(spa
->spa_meta_objset
, obj
, 0, bufsize
, packed
, tx
);
6074 kmem_free(packed
, bufsize
);
6076 VERIFY(0 == dmu_bonus_hold(spa
->spa_meta_objset
, obj
, FTAG
, &db
));
6077 dmu_buf_will_dirty(db
, tx
);
6078 *(uint64_t *)db
->db_data
= nvsize
;
6079 dmu_buf_rele(db
, FTAG
);
6083 spa_sync_aux_dev(spa_t
*spa
, spa_aux_vdev_t
*sav
, dmu_tx_t
*tx
,
6084 const char *config
, const char *entry
)
6094 * Update the MOS nvlist describing the list of available devices.
6095 * spa_validate_aux() will have already made sure this nvlist is
6096 * valid and the vdevs are labeled appropriately.
6098 if (sav
->sav_object
== 0) {
6099 sav
->sav_object
= dmu_object_alloc(spa
->spa_meta_objset
,
6100 DMU_OT_PACKED_NVLIST
, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE
,
6101 sizeof (uint64_t), tx
);
6102 VERIFY(zap_update(spa
->spa_meta_objset
,
6103 DMU_POOL_DIRECTORY_OBJECT
, entry
, sizeof (uint64_t), 1,
6104 &sav
->sav_object
, tx
) == 0);
6107 VERIFY(nvlist_alloc(&nvroot
, NV_UNIQUE_NAME
, KM_SLEEP
) == 0);
6108 if (sav
->sav_count
== 0) {
6109 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, NULL
, 0) == 0);
6111 list
= kmem_alloc(sav
->sav_count
* sizeof (void *), KM_SLEEP
);
6112 for (i
= 0; i
< sav
->sav_count
; i
++)
6113 list
[i
] = vdev_config_generate(spa
, sav
->sav_vdevs
[i
],
6114 B_FALSE
, VDEV_CONFIG_L2CACHE
);
6115 VERIFY(nvlist_add_nvlist_array(nvroot
, config
, list
,
6116 sav
->sav_count
) == 0);
6117 for (i
= 0; i
< sav
->sav_count
; i
++)
6118 nvlist_free(list
[i
]);
6119 kmem_free(list
, sav
->sav_count
* sizeof (void *));
6122 spa_sync_nvlist(spa
, sav
->sav_object
, nvroot
, tx
);
6123 nvlist_free(nvroot
);
6125 sav
->sav_sync
= B_FALSE
;
6129 * Rebuild spa's all-vdev ZAP from the vdev ZAPs indicated in each vdev_t.
6130 * The all-vdev ZAP must be empty.
6133 spa_avz_build(vdev_t
*vd
, uint64_t avz
, dmu_tx_t
*tx
)
6135 spa_t
*spa
= vd
->vdev_spa
;
6136 if (vd
->vdev_top_zap
!= 0) {
6137 VERIFY0(zap_add_int(spa
->spa_meta_objset
, avz
,
6138 vd
->vdev_top_zap
, tx
));
6140 if (vd
->vdev_leaf_zap
!= 0) {
6141 VERIFY0(zap_add_int(spa
->spa_meta_objset
, avz
,
6142 vd
->vdev_leaf_zap
, tx
));
6144 for (uint64_t i
= 0; i
< vd
->vdev_children
; i
++) {
6145 spa_avz_build(vd
->vdev_child
[i
], avz
, tx
);
6150 spa_sync_config_object(spa_t
*spa
, dmu_tx_t
*tx
)
6155 * If the pool is being imported from a pre-per-vdev-ZAP version of ZFS,
6156 * its config may not be dirty but we still need to build per-vdev ZAPs.
6157 * Similarly, if the pool is being assembled (e.g. after a split), we
6158 * need to rebuild the AVZ although the config may not be dirty.
6160 if (list_is_empty(&spa
->spa_config_dirty_list
) &&
6161 spa
->spa_avz_action
== AVZ_ACTION_NONE
)
6164 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
6166 ASSERT(spa
->spa_avz_action
== AVZ_ACTION_NONE
||
6167 spa
->spa_avz_action
== AVZ_ACTION_INITIALIZE
||
6168 spa
->spa_all_vdev_zaps
!= 0);
6170 if (spa
->spa_avz_action
== AVZ_ACTION_REBUILD
) {
6171 /* Make and build the new AVZ */
6172 uint64_t new_avz
= zap_create(spa
->spa_meta_objset
,
6173 DMU_OTN_ZAP_METADATA
, DMU_OT_NONE
, 0, tx
);
6174 spa_avz_build(spa
->spa_root_vdev
, new_avz
, tx
);
6176 /* Diff old AVZ with new one */
6180 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
6181 spa
->spa_all_vdev_zaps
);
6182 zap_cursor_retrieve(&zc
, &za
) == 0;
6183 zap_cursor_advance(&zc
)) {
6184 uint64_t vdzap
= za
.za_first_integer
;
6185 if (zap_lookup_int(spa
->spa_meta_objset
, new_avz
,
6188 * ZAP is listed in old AVZ but not in new one;
6191 VERIFY0(zap_destroy(spa
->spa_meta_objset
, vdzap
,
6196 zap_cursor_fini(&zc
);
6198 /* Destroy the old AVZ */
6199 VERIFY0(zap_destroy(spa
->spa_meta_objset
,
6200 spa
->spa_all_vdev_zaps
, tx
));
6202 /* Replace the old AVZ in the dir obj with the new one */
6203 VERIFY0(zap_update(spa
->spa_meta_objset
,
6204 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_VDEV_ZAP_MAP
,
6205 sizeof (new_avz
), 1, &new_avz
, tx
));
6207 spa
->spa_all_vdev_zaps
= new_avz
;
6208 } else if (spa
->spa_avz_action
== AVZ_ACTION_DESTROY
) {
6212 /* Walk through the AVZ and destroy all listed ZAPs */
6213 for (zap_cursor_init(&zc
, spa
->spa_meta_objset
,
6214 spa
->spa_all_vdev_zaps
);
6215 zap_cursor_retrieve(&zc
, &za
) == 0;
6216 zap_cursor_advance(&zc
)) {
6217 uint64_t zap
= za
.za_first_integer
;
6218 VERIFY0(zap_destroy(spa
->spa_meta_objset
, zap
, tx
));
6221 zap_cursor_fini(&zc
);
6223 /* Destroy and unlink the AVZ itself */
6224 VERIFY0(zap_destroy(spa
->spa_meta_objset
,
6225 spa
->spa_all_vdev_zaps
, tx
));
6226 VERIFY0(zap_remove(spa
->spa_meta_objset
,
6227 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_VDEV_ZAP_MAP
, tx
));
6228 spa
->spa_all_vdev_zaps
= 0;
6231 if (spa
->spa_all_vdev_zaps
== 0) {
6232 spa
->spa_all_vdev_zaps
= zap_create_link(spa
->spa_meta_objset
,
6233 DMU_OTN_ZAP_METADATA
, DMU_POOL_DIRECTORY_OBJECT
,
6234 DMU_POOL_VDEV_ZAP_MAP
, tx
);
6236 spa
->spa_avz_action
= AVZ_ACTION_NONE
;
6238 /* Create ZAPs for vdevs that don't have them. */
6239 vdev_construct_zaps(spa
->spa_root_vdev
, tx
);
6241 config
= spa_config_generate(spa
, spa
->spa_root_vdev
,
6242 dmu_tx_get_txg(tx
), B_FALSE
);
6245 * If we're upgrading the spa version then make sure that
6246 * the config object gets updated with the correct version.
6248 if (spa
->spa_ubsync
.ub_version
< spa
->spa_uberblock
.ub_version
)
6249 fnvlist_add_uint64(config
, ZPOOL_CONFIG_VERSION
,
6250 spa
->spa_uberblock
.ub_version
);
6252 spa_config_exit(spa
, SCL_STATE
, FTAG
);
6254 nvlist_free(spa
->spa_config_syncing
);
6255 spa
->spa_config_syncing
= config
;
6257 spa_sync_nvlist(spa
, spa
->spa_config_object
, config
, tx
);
6261 spa_sync_version(void *arg
, dmu_tx_t
*tx
)
6263 uint64_t *versionp
= arg
;
6264 uint64_t version
= *versionp
;
6265 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
6268 * Setting the version is special cased when first creating the pool.
6270 ASSERT(tx
->tx_txg
!= TXG_INITIAL
);
6272 ASSERT(SPA_VERSION_IS_SUPPORTED(version
));
6273 ASSERT(version
>= spa_version(spa
));
6275 spa
->spa_uberblock
.ub_version
= version
;
6276 vdev_config_dirty(spa
->spa_root_vdev
);
6277 spa_history_log_internal(spa
, "set", tx
, "version=%lld", version
);
6281 * Set zpool properties.
6284 spa_sync_props(void *arg
, dmu_tx_t
*tx
)
6286 nvlist_t
*nvp
= arg
;
6287 spa_t
*spa
= dmu_tx_pool(tx
)->dp_spa
;
6288 objset_t
*mos
= spa
->spa_meta_objset
;
6289 nvpair_t
*elem
= NULL
;
6291 mutex_enter(&spa
->spa_props_lock
);
6293 while ((elem
= nvlist_next_nvpair(nvp
, elem
))) {
6295 char *strval
, *fname
;
6297 const char *propname
;
6298 zprop_type_t proptype
;
6301 switch (prop
= zpool_name_to_prop(nvpair_name(elem
))) {
6304 * We checked this earlier in spa_prop_validate().
6306 ASSERT(zpool_prop_feature(nvpair_name(elem
)));
6308 fname
= strchr(nvpair_name(elem
), '@') + 1;
6309 VERIFY0(zfeature_lookup_name(fname
, &fid
));
6311 spa_feature_enable(spa
, fid
, tx
);
6312 spa_history_log_internal(spa
, "set", tx
,
6313 "%s=enabled", nvpair_name(elem
));
6316 case ZPOOL_PROP_VERSION
:
6317 intval
= fnvpair_value_uint64(elem
);
6319 * The version is synced seperatly before other
6320 * properties and should be correct by now.
6322 ASSERT3U(spa_version(spa
), >=, intval
);
6325 case ZPOOL_PROP_ALTROOT
:
6327 * 'altroot' is a non-persistent property. It should
6328 * have been set temporarily at creation or import time.
6330 ASSERT(spa
->spa_root
!= NULL
);
6333 case ZPOOL_PROP_READONLY
:
6334 case ZPOOL_PROP_CACHEFILE
:
6336 * 'readonly' and 'cachefile' are also non-persisitent
6340 case ZPOOL_PROP_COMMENT
:
6341 strval
= fnvpair_value_string(elem
);
6342 if (spa
->spa_comment
!= NULL
)
6343 spa_strfree(spa
->spa_comment
);
6344 spa
->spa_comment
= spa_strdup(strval
);
6346 * We need to dirty the configuration on all the vdevs
6347 * so that their labels get updated. It's unnecessary
6348 * to do this for pool creation since the vdev's
6349 * configuratoin has already been dirtied.
6351 if (tx
->tx_txg
!= TXG_INITIAL
)
6352 vdev_config_dirty(spa
->spa_root_vdev
);
6353 spa_history_log_internal(spa
, "set", tx
,
6354 "%s=%s", nvpair_name(elem
), strval
);
6358 * Set pool property values in the poolprops mos object.
6360 if (spa
->spa_pool_props_object
== 0) {
6361 spa
->spa_pool_props_object
=
6362 zap_create_link(mos
, DMU_OT_POOL_PROPS
,
6363 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_PROPS
,
6367 /* normalize the property name */
6368 propname
= zpool_prop_to_name(prop
);
6369 proptype
= zpool_prop_get_type(prop
);
6371 if (nvpair_type(elem
) == DATA_TYPE_STRING
) {
6372 ASSERT(proptype
== PROP_TYPE_STRING
);
6373 strval
= fnvpair_value_string(elem
);
6374 VERIFY0(zap_update(mos
,
6375 spa
->spa_pool_props_object
, propname
,
6376 1, strlen(strval
) + 1, strval
, tx
));
6377 spa_history_log_internal(spa
, "set", tx
,
6378 "%s=%s", nvpair_name(elem
), strval
);
6379 } else if (nvpair_type(elem
) == DATA_TYPE_UINT64
) {
6380 intval
= fnvpair_value_uint64(elem
);
6382 if (proptype
== PROP_TYPE_INDEX
) {
6384 VERIFY0(zpool_prop_index_to_string(
6385 prop
, intval
, &unused
));
6387 VERIFY0(zap_update(mos
,
6388 spa
->spa_pool_props_object
, propname
,
6389 8, 1, &intval
, tx
));
6390 spa_history_log_internal(spa
, "set", tx
,
6391 "%s=%lld", nvpair_name(elem
), intval
);
6393 ASSERT(0); /* not allowed */
6397 case ZPOOL_PROP_DELEGATION
:
6398 spa
->spa_delegation
= intval
;
6400 case ZPOOL_PROP_BOOTFS
:
6401 spa
->spa_bootfs
= intval
;
6403 case ZPOOL_PROP_FAILUREMODE
:
6404 spa
->spa_failmode
= intval
;
6406 case ZPOOL_PROP_AUTOEXPAND
:
6407 spa
->spa_autoexpand
= intval
;
6408 if (tx
->tx_txg
!= TXG_INITIAL
)
6409 spa_async_request(spa
,
6410 SPA_ASYNC_AUTOEXPAND
);
6412 case ZPOOL_PROP_DEDUPDITTO
:
6413 spa
->spa_dedup_ditto
= intval
;
6422 mutex_exit(&spa
->spa_props_lock
);
6426 * Perform one-time upgrade on-disk changes. spa_version() does not
6427 * reflect the new version this txg, so there must be no changes this
6428 * txg to anything that the upgrade code depends on after it executes.
6429 * Therefore this must be called after dsl_pool_sync() does the sync
6433 spa_sync_upgrades(spa_t
*spa
, dmu_tx_t
*tx
)
6435 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
6437 ASSERT(spa
->spa_sync_pass
== 1);
6439 rrw_enter(&dp
->dp_config_rwlock
, RW_WRITER
, FTAG
);
6441 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_ORIGIN
&&
6442 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_ORIGIN
) {
6443 dsl_pool_create_origin(dp
, tx
);
6445 /* Keeping the origin open increases spa_minref */
6446 spa
->spa_minref
+= 3;
6449 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_NEXT_CLONES
&&
6450 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_NEXT_CLONES
) {
6451 dsl_pool_upgrade_clones(dp
, tx
);
6454 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_DIR_CLONES
&&
6455 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_DIR_CLONES
) {
6456 dsl_pool_upgrade_dir_clones(dp
, tx
);
6458 /* Keeping the freedir open increases spa_minref */
6459 spa
->spa_minref
+= 3;
6462 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_FEATURES
&&
6463 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_FEATURES
) {
6464 spa_feature_create_zap_objects(spa
, tx
);
6468 * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable
6469 * when possibility to use lz4 compression for metadata was added
6470 * Old pools that have this feature enabled must be upgraded to have
6471 * this feature active
6473 if (spa
->spa_uberblock
.ub_version
>= SPA_VERSION_FEATURES
) {
6474 boolean_t lz4_en
= spa_feature_is_enabled(spa
,
6475 SPA_FEATURE_LZ4_COMPRESS
);
6476 boolean_t lz4_ac
= spa_feature_is_active(spa
,
6477 SPA_FEATURE_LZ4_COMPRESS
);
6479 if (lz4_en
&& !lz4_ac
)
6480 spa_feature_incr(spa
, SPA_FEATURE_LZ4_COMPRESS
, tx
);
6484 * If we haven't written the salt, do so now. Note that the
6485 * feature may not be activated yet, but that's fine since
6486 * the presence of this ZAP entry is backwards compatible.
6488 if (zap_contains(spa
->spa_meta_objset
, DMU_POOL_DIRECTORY_OBJECT
,
6489 DMU_POOL_CHECKSUM_SALT
) == ENOENT
) {
6490 VERIFY0(zap_add(spa
->spa_meta_objset
,
6491 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_CHECKSUM_SALT
, 1,
6492 sizeof (spa
->spa_cksum_salt
.zcs_bytes
),
6493 spa
->spa_cksum_salt
.zcs_bytes
, tx
));
6496 rrw_exit(&dp
->dp_config_rwlock
, FTAG
);
6500 * Sync the specified transaction group. New blocks may be dirtied as
6501 * part of the process, so we iterate until it converges.
6504 spa_sync(spa_t
*spa
, uint64_t txg
)
6506 dsl_pool_t
*dp
= spa
->spa_dsl_pool
;
6507 objset_t
*mos
= spa
->spa_meta_objset
;
6508 bplist_t
*free_bpl
= &spa
->spa_free_bplist
[txg
& TXG_MASK
];
6509 vdev_t
*rvd
= spa
->spa_root_vdev
;
6513 uint32_t max_queue_depth
= zfs_vdev_async_write_max_active
*
6514 zfs_vdev_queue_depth_pct
/ 100;
6516 VERIFY(spa_writeable(spa
));
6519 * Lock out configuration changes.
6521 spa_config_enter(spa
, SCL_CONFIG
, FTAG
, RW_READER
);
6523 spa
->spa_syncing_txg
= txg
;
6524 spa
->spa_sync_pass
= 0;
6526 mutex_enter(&spa
->spa_alloc_lock
);
6527 VERIFY0(avl_numnodes(&spa
->spa_alloc_tree
));
6528 mutex_exit(&spa
->spa_alloc_lock
);
6531 * If there are any pending vdev state changes, convert them
6532 * into config changes that go out with this transaction group.
6534 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
6535 while (list_head(&spa
->spa_state_dirty_list
) != NULL
) {
6537 * We need the write lock here because, for aux vdevs,
6538 * calling vdev_config_dirty() modifies sav_config.
6539 * This is ugly and will become unnecessary when we
6540 * eliminate the aux vdev wart by integrating all vdevs
6541 * into the root vdev tree.
6543 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
6544 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_WRITER
);
6545 while ((vd
= list_head(&spa
->spa_state_dirty_list
)) != NULL
) {
6546 vdev_state_clean(vd
);
6547 vdev_config_dirty(vd
);
6549 spa_config_exit(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
);
6550 spa_config_enter(spa
, SCL_CONFIG
| SCL_STATE
, FTAG
, RW_READER
);
6552 spa_config_exit(spa
, SCL_STATE
, FTAG
);
6554 tx
= dmu_tx_create_assigned(dp
, txg
);
6556 spa
->spa_sync_starttime
= gethrtime();
6557 VERIFY(cyclic_reprogram(spa
->spa_deadman_cycid
,
6558 spa
->spa_sync_starttime
+ spa
->spa_deadman_synctime
));
6561 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg,
6562 * set spa_deflate if we have no raid-z vdevs.
6564 if (spa
->spa_ubsync
.ub_version
< SPA_VERSION_RAIDZ_DEFLATE
&&
6565 spa
->spa_uberblock
.ub_version
>= SPA_VERSION_RAIDZ_DEFLATE
) {
6568 for (i
= 0; i
< rvd
->vdev_children
; i
++) {
6569 vd
= rvd
->vdev_child
[i
];
6570 if (vd
->vdev_deflate_ratio
!= SPA_MINBLOCKSIZE
)
6573 if (i
== rvd
->vdev_children
) {
6574 spa
->spa_deflate
= TRUE
;
6575 VERIFY(0 == zap_add(spa
->spa_meta_objset
,
6576 DMU_POOL_DIRECTORY_OBJECT
, DMU_POOL_DEFLATE
,
6577 sizeof (uint64_t), 1, &spa
->spa_deflate
, tx
));
6582 * Set the top-level vdev's max queue depth. Evaluate each
6583 * top-level's async write queue depth in case it changed.
6584 * The max queue depth will not change in the middle of syncing
6587 uint64_t queue_depth_total
= 0;
6588 for (int c
= 0; c
< rvd
->vdev_children
; c
++) {
6589 vdev_t
*tvd
= rvd
->vdev_child
[c
];
6590 metaslab_group_t
*mg
= tvd
->vdev_mg
;
6592 if (mg
== NULL
|| mg
->mg_class
!= spa_normal_class(spa
) ||
6593 !metaslab_group_initialized(mg
))
6597 * It is safe to do a lock-free check here because only async
6598 * allocations look at mg_max_alloc_queue_depth, and async
6599 * allocations all happen from spa_sync().
6601 ASSERT0(refcount_count(&mg
->mg_alloc_queue_depth
));
6602 mg
->mg_max_alloc_queue_depth
= max_queue_depth
;
6603 queue_depth_total
+= mg
->mg_max_alloc_queue_depth
;
6605 metaslab_class_t
*mc
= spa_normal_class(spa
);
6606 ASSERT0(refcount_count(&mc
->mc_alloc_slots
));
6607 mc
->mc_alloc_max_slots
= queue_depth_total
;
6608 mc
->mc_alloc_throttle_enabled
= zio_dva_throttle_enabled
;
6610 ASSERT3U(mc
->mc_alloc_max_slots
, <=,
6611 max_queue_depth
* rvd
->vdev_children
);
6614 * Iterate to convergence.
6617 int pass
= ++spa
->spa_sync_pass
;
6619 spa_sync_config_object(spa
, tx
);
6620 spa_sync_aux_dev(spa
, &spa
->spa_spares
, tx
,
6621 ZPOOL_CONFIG_SPARES
, DMU_POOL_SPARES
);
6622 spa_sync_aux_dev(spa
, &spa
->spa_l2cache
, tx
,
6623 ZPOOL_CONFIG_L2CACHE
, DMU_POOL_L2CACHE
);
6624 spa_errlog_sync(spa
, txg
);
6625 dsl_pool_sync(dp
, txg
);
6627 if (pass
< zfs_sync_pass_deferred_free
) {
6628 spa_sync_frees(spa
, free_bpl
, tx
);
6631 * We can not defer frees in pass 1, because
6632 * we sync the deferred frees later in pass 1.
6634 ASSERT3U(pass
, >, 1);
6635 bplist_iterate(free_bpl
, bpobj_enqueue_cb
,
6636 &spa
->spa_deferred_bpobj
, tx
);
6640 dsl_scan_sync(dp
, tx
);
6642 while (vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, txg
))
6646 spa_sync_upgrades(spa
, tx
);
6648 spa
->spa_uberblock
.ub_rootbp
.blk_birth
);
6650 * Note: We need to check if the MOS is dirty
6651 * because we could have marked the MOS dirty
6652 * without updating the uberblock (e.g. if we
6653 * have sync tasks but no dirty user data). We
6654 * need to check the uberblock's rootbp because
6655 * it is updated if we have synced out dirty
6656 * data (though in this case the MOS will most
6657 * likely also be dirty due to second order
6658 * effects, we don't want to rely on that here).
6660 if (spa
->spa_uberblock
.ub_rootbp
.blk_birth
< txg
&&
6661 !dmu_objset_is_dirty(mos
, txg
)) {
6663 * Nothing changed on the first pass,
6664 * therefore this TXG is a no-op. Avoid
6665 * syncing deferred frees, so that we
6666 * can keep this TXG as a no-op.
6668 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
,
6670 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
6671 ASSERT(txg_list_empty(&dp
->dp_sync_tasks
, txg
));
6674 spa_sync_deferred_frees(spa
, tx
);
6677 } while (dmu_objset_is_dirty(mos
, txg
));
6679 if (!list_is_empty(&spa
->spa_config_dirty_list
)) {
6681 * Make sure that the number of ZAPs for all the vdevs matches
6682 * the number of ZAPs in the per-vdev ZAP list. This only gets
6683 * called if the config is dirty; otherwise there may be
6684 * outstanding AVZ operations that weren't completed in
6685 * spa_sync_config_object.
6687 uint64_t all_vdev_zap_entry_count
;
6688 ASSERT0(zap_count(spa
->spa_meta_objset
,
6689 spa
->spa_all_vdev_zaps
, &all_vdev_zap_entry_count
));
6690 ASSERT3U(vdev_count_verify_zaps(spa
->spa_root_vdev
), ==,
6691 all_vdev_zap_entry_count
);
6695 * Rewrite the vdev configuration (which includes the uberblock)
6696 * to commit the transaction group.
6698 * If there are no dirty vdevs, we sync the uberblock to a few
6699 * random top-level vdevs that are known to be visible in the
6700 * config cache (see spa_vdev_add() for a complete description).
6701 * If there *are* dirty vdevs, sync the uberblock to all vdevs.
6705 * We hold SCL_STATE to prevent vdev open/close/etc.
6706 * while we're attempting to write the vdev labels.
6708 spa_config_enter(spa
, SCL_STATE
, FTAG
, RW_READER
);
6710 if (list_is_empty(&spa
->spa_config_dirty_list
)) {
6711 vdev_t
*svd
[SPA_DVAS_PER_BP
];
6713 int children
= rvd
->vdev_children
;
6714 int c0
= spa_get_random(children
);
6716 for (int c
= 0; c
< children
; c
++) {
6717 vd
= rvd
->vdev_child
[(c0
+ c
) % children
];
6718 if (vd
->vdev_ms_array
== 0 || vd
->vdev_islog
)
6720 svd
[svdcount
++] = vd
;
6721 if (svdcount
== SPA_DVAS_PER_BP
)
6724 error
= vdev_config_sync(svd
, svdcount
, txg
);
6726 error
= vdev_config_sync(rvd
->vdev_child
,
6727 rvd
->vdev_children
, txg
);
6731 spa
->spa_last_synced_guid
= rvd
->vdev_guid
;
6733 spa_config_exit(spa
, SCL_STATE
, FTAG
);
6737 zio_suspend(spa
, NULL
);
6738 zio_resume_wait(spa
);
6742 VERIFY(cyclic_reprogram(spa
->spa_deadman_cycid
, CY_INFINITY
));
6745 * Clear the dirty config list.
6747 while ((vd
= list_head(&spa
->spa_config_dirty_list
)) != NULL
)
6748 vdev_config_clean(vd
);
6751 * Now that the new config has synced transactionally,
6752 * let it become visible to the config cache.
6754 if (spa
->spa_config_syncing
!= NULL
) {
6755 spa_config_set(spa
, spa
->spa_config_syncing
);
6756 spa
->spa_config_txg
= txg
;
6757 spa
->spa_config_syncing
= NULL
;
6760 dsl_pool_sync_done(dp
, txg
);
6762 mutex_enter(&spa
->spa_alloc_lock
);
6763 VERIFY0(avl_numnodes(&spa
->spa_alloc_tree
));
6764 mutex_exit(&spa
->spa_alloc_lock
);
6767 * Update usable space statistics.
6769 while (vd
= txg_list_remove(&spa
->spa_vdev_txg_list
, TXG_CLEAN(txg
)))
6770 vdev_sync_done(vd
, txg
);
6772 spa_update_dspace(spa
);
6775 * It had better be the case that we didn't dirty anything
6776 * since vdev_config_sync().
6778 ASSERT(txg_list_empty(&dp
->dp_dirty_datasets
, txg
));
6779 ASSERT(txg_list_empty(&dp
->dp_dirty_dirs
, txg
));
6780 ASSERT(txg_list_empty(&spa
->spa_vdev_txg_list
, txg
));
6782 spa
->spa_sync_pass
= 0;
6785 * Update the last synced uberblock here. We want to do this at
6786 * the end of spa_sync() so that consumers of spa_last_synced_txg()
6787 * will be guaranteed that all the processing associated with
6788 * that txg has been completed.
6790 spa
->spa_ubsync
= spa
->spa_uberblock
;
6791 spa_config_exit(spa
, SCL_CONFIG
, FTAG
);
6793 spa_handle_ignored_writes(spa
);
6796 * If any async tasks have been requested, kick them off.
6798 spa_async_dispatch(spa
);
6802 * Sync all pools. We don't want to hold the namespace lock across these
6803 * operations, so we take a reference on the spa_t and drop the lock during the
6807 spa_sync_allpools(void)
6810 mutex_enter(&spa_namespace_lock
);
6811 while ((spa
= spa_next(spa
)) != NULL
) {
6812 if (spa_state(spa
) != POOL_STATE_ACTIVE
||
6813 !spa_writeable(spa
) || spa_suspended(spa
))
6815 spa_open_ref(spa
, FTAG
);
6816 mutex_exit(&spa_namespace_lock
);
6817 txg_wait_synced(spa_get_dsl(spa
), 0);
6818 mutex_enter(&spa_namespace_lock
);
6819 spa_close(spa
, FTAG
);
6821 mutex_exit(&spa_namespace_lock
);
6825 * ==========================================================================
6826 * Miscellaneous routines
6827 * ==========================================================================
6831 * Remove all pools in the system.
6839 * Remove all cached state. All pools should be closed now,
6840 * so every spa in the AVL tree should be unreferenced.
6842 mutex_enter(&spa_namespace_lock
);
6843 while ((spa
= spa_next(NULL
)) != NULL
) {
6845 * Stop async tasks. The async thread may need to detach
6846 * a device that's been replaced, which requires grabbing
6847 * spa_namespace_lock, so we must drop it here.
6849 spa_open_ref(spa
, FTAG
);
6850 mutex_exit(&spa_namespace_lock
);
6851 spa_async_suspend(spa
);
6852 mutex_enter(&spa_namespace_lock
);
6853 spa_close(spa
, FTAG
);
6855 if (spa
->spa_state
!= POOL_STATE_UNINITIALIZED
) {
6857 spa_deactivate(spa
);
6861 mutex_exit(&spa_namespace_lock
);
6865 spa_lookup_by_guid(spa_t
*spa
, uint64_t guid
, boolean_t aux
)
6870 if ((vd
= vdev_lookup_by_guid(spa
->spa_root_vdev
, guid
)) != NULL
)
6874 for (i
= 0; i
< spa
->spa_l2cache
.sav_count
; i
++) {
6875 vd
= spa
->spa_l2cache
.sav_vdevs
[i
];
6876 if (vd
->vdev_guid
== guid
)
6880 for (i
= 0; i
< spa
->spa_spares
.sav_count
; i
++) {
6881 vd
= spa
->spa_spares
.sav_vdevs
[i
];
6882 if (vd
->vdev_guid
== guid
)
6891 spa_upgrade(spa_t
*spa
, uint64_t version
)
6893 ASSERT(spa_writeable(spa
));
6895 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
6898 * This should only be called for a non-faulted pool, and since a
6899 * future version would result in an unopenable pool, this shouldn't be
6902 ASSERT(SPA_VERSION_IS_SUPPORTED(spa
->spa_uberblock
.ub_version
));
6903 ASSERT3U(version
, >=, spa
->spa_uberblock
.ub_version
);
6905 spa
->spa_uberblock
.ub_version
= version
;
6906 vdev_config_dirty(spa
->spa_root_vdev
);
6908 spa_config_exit(spa
, SCL_ALL
, FTAG
);
6910 txg_wait_synced(spa_get_dsl(spa
), 0);
6914 spa_has_spare(spa_t
*spa
, uint64_t guid
)
6918 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
6920 for (i
= 0; i
< sav
->sav_count
; i
++)
6921 if (sav
->sav_vdevs
[i
]->vdev_guid
== guid
)
6924 for (i
= 0; i
< sav
->sav_npending
; i
++) {
6925 if (nvlist_lookup_uint64(sav
->sav_pending
[i
], ZPOOL_CONFIG_GUID
,
6926 &spareguid
) == 0 && spareguid
== guid
)
6934 * Check if a pool has an active shared spare device.
6935 * Note: reference count of an active spare is 2, as a spare and as a replace
6938 spa_has_active_shared_spare(spa_t
*spa
)
6942 spa_aux_vdev_t
*sav
= &spa
->spa_spares
;
6944 for (i
= 0; i
< sav
->sav_count
; i
++) {
6945 if (spa_spare_exists(sav
->sav_vdevs
[i
]->vdev_guid
, &pool
,
6946 &refcnt
) && pool
!= 0ULL && pool
== spa_guid(spa
) &&
6955 spa_event_create(spa_t
*spa
, vdev_t
*vd
, nvlist_t
*hist_nvl
, const char *name
)
6957 sysevent_t
*ev
= NULL
;
6959 sysevent_attr_list_t
*attr
= NULL
;
6960 sysevent_value_t value
;
6962 ev
= sysevent_alloc(EC_ZFS
, (char *)name
, SUNW_KERN_PUB
"zfs",
6966 value
.value_type
= SE_DATA_TYPE_STRING
;
6967 value
.value
.sv_string
= spa_name(spa
);
6968 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_NAME
, &value
, SE_SLEEP
) != 0)
6971 value
.value_type
= SE_DATA_TYPE_UINT64
;
6972 value
.value
.sv_uint64
= spa_guid(spa
);
6973 if (sysevent_add_attr(&attr
, ZFS_EV_POOL_GUID
, &value
, SE_SLEEP
) != 0)
6977 value
.value_type
= SE_DATA_TYPE_UINT64
;
6978 value
.value
.sv_uint64
= vd
->vdev_guid
;
6979 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_GUID
, &value
,
6983 if (vd
->vdev_path
) {
6984 value
.value_type
= SE_DATA_TYPE_STRING
;
6985 value
.value
.sv_string
= vd
->vdev_path
;
6986 if (sysevent_add_attr(&attr
, ZFS_EV_VDEV_PATH
,
6987 &value
, SE_SLEEP
) != 0)
6992 if (hist_nvl
!= NULL
) {
6993 fnvlist_merge((nvlist_t
*)attr
, hist_nvl
);
6996 if (sysevent_attach_attributes(ev
, attr
) != 0)
7002 sysevent_free_attr(attr
);
7009 spa_event_post(sysevent_t
*ev
)
7014 (void) log_sysevent(ev
, SE_SLEEP
, &eid
);
7020 * Post a sysevent corresponding to the given event. The 'name' must be one of
7021 * the event definitions in sys/sysevent/eventdefs.h. The payload will be
7022 * filled in from the spa and (optionally) the vdev and history nvl. This
7023 * doesn't do anything in the userland libzpool, as we don't want consumers to
7024 * misinterpret ztest or zdb as real changes.
7027 spa_event_notify(spa_t
*spa
, vdev_t
*vd
, nvlist_t
*hist_nvl
, const char *name
)
7029 spa_event_post(spa_event_create(spa
, vd
, hist_nvl
, name
));