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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2011 by Delphix. All rights reserved.
24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
27 #include <sys/zfs_context.h>
28 #include <sys/spa_impl.h>
30 #include <sys/zio_checksum.h>
31 #include <sys/zio_compress.h>
33 #include <sys/dmu_tx.h>
36 #include <sys/vdev_impl.h>
37 #include <sys/metaslab.h>
38 #include <sys/uberblock_impl.h>
41 #include <sys/unique.h>
42 #include <sys/dsl_pool.h>
43 #include <sys/dsl_dir.h>
44 #include <sys/dsl_prop.h>
45 #include <sys/fm/util.h>
46 #include <sys/dsl_scan.h>
47 #include <sys/fs/zfs.h>
48 #include <sys/metaslab_impl.h>
56 * There are four basic locks for managing spa_t structures:
58 * spa_namespace_lock (global mutex)
60 * This lock must be acquired to do any of the following:
62 * - Lookup a spa_t by name
63 * - Add or remove a spa_t from the namespace
64 * - Increase spa_refcount from non-zero
65 * - Check if spa_refcount is zero
67 * - add/remove/attach/detach devices
68 * - Held for the duration of create/destroy/import/export
70 * It does not need to handle recursion. A create or destroy may
71 * reference objects (files or zvols) in other pools, but by
72 * definition they must have an existing reference, and will never need
73 * to lookup a spa_t by name.
75 * spa_refcount (per-spa refcount_t protected by mutex)
77 * This reference count keep track of any active users of the spa_t. The
78 * spa_t cannot be destroyed or freed while this is non-zero. Internally,
79 * the refcount is never really 'zero' - opening a pool implicitly keeps
80 * some references in the DMU. Internally we check against spa_minref, but
81 * present the image of a zero/non-zero value to consumers.
83 * spa_config_lock[] (per-spa array of rwlocks)
85 * This protects the spa_t from config changes, and must be held in
86 * the following circumstances:
88 * - RW_READER to perform I/O to the spa
89 * - RW_WRITER to change the vdev config
91 * The locking order is fairly straightforward:
93 * spa_namespace_lock -> spa_refcount
95 * The namespace lock must be acquired to increase the refcount from 0
96 * or to check if it is zero.
98 * spa_refcount -> spa_config_lock[]
100 * There must be at least one valid reference on the spa_t to acquire
103 * spa_namespace_lock -> spa_config_lock[]
105 * The namespace lock must always be taken before the config lock.
108 * The spa_namespace_lock can be acquired directly and is globally visible.
110 * The namespace is manipulated using the following functions, all of which
111 * require the spa_namespace_lock to be held.
113 * spa_lookup() Lookup a spa_t by name.
115 * spa_add() Create a new spa_t in the namespace.
117 * spa_remove() Remove a spa_t from the namespace. This also
118 * frees up any memory associated with the spa_t.
120 * spa_next() Returns the next spa_t in the system, or the
121 * first if NULL is passed.
123 * spa_evict_all() Shutdown and remove all spa_t structures in
126 * spa_guid_exists() Determine whether a pool/device guid exists.
128 * The spa_refcount is manipulated using the following functions:
130 * spa_open_ref() Adds a reference to the given spa_t. Must be
131 * called with spa_namespace_lock held if the
132 * refcount is currently zero.
134 * spa_close() Remove a reference from the spa_t. This will
135 * not free the spa_t or remove it from the
136 * namespace. No locking is required.
138 * spa_refcount_zero() Returns true if the refcount is currently
139 * zero. Must be called with spa_namespace_lock
142 * The spa_config_lock[] is an array of rwlocks, ordered as follows:
143 * SCL_CONFIG > SCL_STATE > SCL_ALLOC > SCL_ZIO > SCL_FREE > SCL_VDEV.
144 * spa_config_lock[] is manipulated with spa_config_{enter,exit,held}().
146 * To read the configuration, it suffices to hold one of these locks as reader.
147 * To modify the configuration, you must hold all locks as writer. To modify
148 * vdev state without altering the vdev tree's topology (e.g. online/offline),
149 * you must hold SCL_STATE and SCL_ZIO as writer.
151 * We use these distinct config locks to avoid recursive lock entry.
152 * For example, spa_sync() (which holds SCL_CONFIG as reader) induces
153 * block allocations (SCL_ALLOC), which may require reading space maps
154 * from disk (dmu_read() -> zio_read() -> SCL_ZIO).
156 * The spa config locks cannot be normal rwlocks because we need the
157 * ability to hand off ownership. For example, SCL_ZIO is acquired
158 * by the issuing thread and later released by an interrupt thread.
159 * They do, however, obey the usual write-wanted semantics to prevent
160 * writer (i.e. system administrator) starvation.
162 * The lock acquisition rules are as follows:
165 * Protects changes to the vdev tree topology, such as vdev
166 * add/remove/attach/detach. Protects the dirty config list
167 * (spa_config_dirty_list) and the set of spares and l2arc devices.
170 * Protects changes to pool state and vdev state, such as vdev
171 * online/offline/fault/degrade/clear. Protects the dirty state list
172 * (spa_state_dirty_list) and global pool state (spa_state).
175 * Protects changes to metaslab groups and classes.
176 * Held as reader by metaslab_alloc() and metaslab_claim().
179 * Held by bp-level zios (those which have no io_vd upon entry)
180 * to prevent changes to the vdev tree. The bp-level zio implicitly
181 * protects all of its vdev child zios, which do not hold SCL_ZIO.
184 * Protects changes to metaslab groups and classes.
185 * Held as reader by metaslab_free(). SCL_FREE is distinct from
186 * SCL_ALLOC, and lower than SCL_ZIO, so that we can safely free
187 * blocks in zio_done() while another i/o that holds either
188 * SCL_ALLOC or SCL_ZIO is waiting for this i/o to complete.
191 * Held as reader to prevent changes to the vdev tree during trivial
192 * inquiries such as bp_get_dsize(). SCL_VDEV is distinct from the
193 * other locks, and lower than all of them, to ensure that it's safe
194 * to acquire regardless of caller context.
196 * In addition, the following rules apply:
198 * (a) spa_props_lock protects pool properties, spa_config and spa_config_list.
199 * The lock ordering is SCL_CONFIG > spa_props_lock.
201 * (b) I/O operations on leaf vdevs. For any zio operation that takes
202 * an explicit vdev_t argument -- such as zio_ioctl(), zio_read_phys(),
203 * or zio_write_phys() -- the caller must ensure that the config cannot
204 * cannot change in the interim, and that the vdev cannot be reopened.
205 * SCL_STATE as reader suffices for both.
207 * The vdev configuration is protected by spa_vdev_enter() / spa_vdev_exit().
209 * spa_vdev_enter() Acquire the namespace lock and the config lock
212 * spa_vdev_exit() Release the config lock, wait for all I/O
213 * to complete, sync the updated configs to the
214 * cache, and release the namespace lock.
216 * vdev state is protected by spa_vdev_state_enter() / spa_vdev_state_exit().
217 * Like spa_vdev_enter/exit, these are convenience wrappers -- the actual
218 * locking is, always, based on spa_namespace_lock and spa_config_lock[].
220 * spa_rename() is also implemented within this file since is requires
221 * manipulation of the namespace.
224 static avl_tree_t spa_namespace_avl
;
225 kmutex_t spa_namespace_lock
;
226 static kcondvar_t spa_namespace_cv
;
227 static int spa_active_count
;
228 int spa_max_replication_override
= SPA_DVAS_PER_BP
;
230 static kmutex_t spa_spare_lock
;
231 static avl_tree_t spa_spare_avl
;
232 static kmutex_t spa_l2cache_lock
;
233 static avl_tree_t spa_l2cache_avl
;
235 kmem_cache_t
*spa_buffer_pool
;
239 * ==========================================================================
241 * ==========================================================================
244 spa_config_lock_init(spa_t
*spa
)
248 for (i
= 0; i
< SCL_LOCKS
; i
++) {
249 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
250 mutex_init(&scl
->scl_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
251 cv_init(&scl
->scl_cv
, NULL
, CV_DEFAULT
, NULL
);
252 refcount_create(&scl
->scl_count
);
253 scl
->scl_writer
= NULL
;
254 scl
->scl_write_wanted
= 0;
259 spa_config_lock_destroy(spa_t
*spa
)
263 for (i
= 0; i
< SCL_LOCKS
; i
++) {
264 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
265 mutex_destroy(&scl
->scl_lock
);
266 cv_destroy(&scl
->scl_cv
);
267 refcount_destroy(&scl
->scl_count
);
268 ASSERT(scl
->scl_writer
== NULL
);
269 ASSERT(scl
->scl_write_wanted
== 0);
274 spa_config_tryenter(spa_t
*spa
, int locks
, void *tag
, krw_t rw
)
278 for (i
= 0; i
< SCL_LOCKS
; i
++) {
279 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
280 if (!(locks
& (1 << i
)))
282 mutex_enter(&scl
->scl_lock
);
283 if (rw
== RW_READER
) {
284 if (scl
->scl_writer
|| scl
->scl_write_wanted
) {
285 mutex_exit(&scl
->scl_lock
);
286 spa_config_exit(spa
, locks
^ (1 << i
), tag
);
290 ASSERT(scl
->scl_writer
!= curthread
);
291 if (!refcount_is_zero(&scl
->scl_count
)) {
292 mutex_exit(&scl
->scl_lock
);
293 spa_config_exit(spa
, locks
^ (1 << i
), tag
);
296 scl
->scl_writer
= curthread
;
298 (void) refcount_add(&scl
->scl_count
, tag
);
299 mutex_exit(&scl
->scl_lock
);
305 spa_config_enter(spa_t
*spa
, int locks
, void *tag
, krw_t rw
)
310 for (i
= 0; i
< SCL_LOCKS
; i
++) {
311 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
312 if (scl
->scl_writer
== curthread
)
313 wlocks_held
|= (1 << i
);
314 if (!(locks
& (1 << i
)))
316 mutex_enter(&scl
->scl_lock
);
317 if (rw
== RW_READER
) {
318 while (scl
->scl_writer
|| scl
->scl_write_wanted
) {
319 cv_wait(&scl
->scl_cv
, &scl
->scl_lock
);
322 ASSERT(scl
->scl_writer
!= curthread
);
323 while (!refcount_is_zero(&scl
->scl_count
)) {
324 scl
->scl_write_wanted
++;
325 cv_wait(&scl
->scl_cv
, &scl
->scl_lock
);
326 scl
->scl_write_wanted
--;
328 scl
->scl_writer
= curthread
;
330 (void) refcount_add(&scl
->scl_count
, tag
);
331 mutex_exit(&scl
->scl_lock
);
333 ASSERT(wlocks_held
<= locks
);
337 spa_config_exit(spa_t
*spa
, int locks
, void *tag
)
341 for (i
= SCL_LOCKS
- 1; i
>= 0; i
--) {
342 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
343 if (!(locks
& (1 << i
)))
345 mutex_enter(&scl
->scl_lock
);
346 ASSERT(!refcount_is_zero(&scl
->scl_count
));
347 if (refcount_remove(&scl
->scl_count
, tag
) == 0) {
348 ASSERT(scl
->scl_writer
== NULL
||
349 scl
->scl_writer
== curthread
);
350 scl
->scl_writer
= NULL
; /* OK in either case */
351 cv_broadcast(&scl
->scl_cv
);
353 mutex_exit(&scl
->scl_lock
);
358 spa_config_held(spa_t
*spa
, int locks
, krw_t rw
)
360 int i
, locks_held
= 0;
362 for (i
= 0; i
< SCL_LOCKS
; i
++) {
363 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
364 if (!(locks
& (1 << i
)))
366 if ((rw
== RW_READER
&& !refcount_is_zero(&scl
->scl_count
)) ||
367 (rw
== RW_WRITER
&& scl
->scl_writer
== curthread
))
368 locks_held
|= 1 << i
;
375 * ==========================================================================
376 * SPA namespace functions
377 * ==========================================================================
381 * Lookup the named spa_t in the AVL tree. The spa_namespace_lock must be held.
382 * Returns NULL if no matching spa_t is found.
385 spa_lookup(const char *name
)
387 static spa_t search
; /* spa_t is large; don't allocate on stack */
393 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
396 * If it's a full dataset name, figure out the pool name and
399 cp
= strpbrk(name
, "/@");
405 (void) strlcpy(search
.spa_name
, name
, sizeof (search
.spa_name
));
406 spa
= avl_find(&spa_namespace_avl
, &search
, &where
);
415 * Create an uninitialized spa_t with the given name. Requires
416 * spa_namespace_lock. The caller must ensure that the spa_t doesn't already
417 * exist by calling spa_lookup() first.
420 spa_add(const char *name
, nvlist_t
*config
, const char *altroot
)
423 spa_config_dirent_t
*dp
;
426 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
428 spa
= kmem_zalloc(sizeof (spa_t
), KM_SLEEP
| KM_NODEBUG
);
430 mutex_init(&spa
->spa_async_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
431 mutex_init(&spa
->spa_errlist_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
432 mutex_init(&spa
->spa_errlog_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
433 mutex_init(&spa
->spa_history_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
434 mutex_init(&spa
->spa_proc_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
435 mutex_init(&spa
->spa_props_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
436 mutex_init(&spa
->spa_scrub_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
437 mutex_init(&spa
->spa_suspend_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
438 mutex_init(&spa
->spa_vdev_top_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
440 cv_init(&spa
->spa_async_cv
, NULL
, CV_DEFAULT
, NULL
);
441 cv_init(&spa
->spa_proc_cv
, NULL
, CV_DEFAULT
, NULL
);
442 cv_init(&spa
->spa_scrub_io_cv
, NULL
, CV_DEFAULT
, NULL
);
443 cv_init(&spa
->spa_suspend_cv
, NULL
, CV_DEFAULT
, NULL
);
445 for (t
= 0; t
< TXG_SIZE
; t
++)
446 bplist_create(&spa
->spa_free_bplist
[t
]);
448 (void) strlcpy(spa
->spa_name
, name
, sizeof (spa
->spa_name
));
449 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
450 spa
->spa_freeze_txg
= UINT64_MAX
;
451 spa
->spa_final_txg
= UINT64_MAX
;
452 spa
->spa_load_max_txg
= UINT64_MAX
;
454 spa
->spa_proc_state
= SPA_PROC_NONE
;
456 refcount_create(&spa
->spa_refcount
);
457 spa_config_lock_init(spa
);
459 avl_add(&spa_namespace_avl
, spa
);
462 * Set the alternate root, if there is one.
465 spa
->spa_root
= spa_strdup(altroot
);
470 * Every pool starts with the default cachefile
472 list_create(&spa
->spa_config_list
, sizeof (spa_config_dirent_t
),
473 offsetof(spa_config_dirent_t
, scd_link
));
475 dp
= kmem_zalloc(sizeof (spa_config_dirent_t
), KM_SLEEP
);
476 dp
->scd_path
= altroot
? NULL
: spa_strdup(spa_config_path
);
477 list_insert_head(&spa
->spa_config_list
, dp
);
479 VERIFY(nvlist_alloc(&spa
->spa_load_info
, NV_UNIQUE_NAME
,
483 VERIFY(nvlist_dup(config
, &spa
->spa_config
, 0) == 0);
489 * Removes a spa_t from the namespace, freeing up any memory used. Requires
490 * spa_namespace_lock. This is called only after the spa_t has been closed and
494 spa_remove(spa_t
*spa
)
496 spa_config_dirent_t
*dp
;
499 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
500 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
502 nvlist_free(spa
->spa_config_splitting
);
504 avl_remove(&spa_namespace_avl
, spa
);
505 cv_broadcast(&spa_namespace_cv
);
508 spa_strfree(spa
->spa_root
);
512 while ((dp
= list_head(&spa
->spa_config_list
)) != NULL
) {
513 list_remove(&spa
->spa_config_list
, dp
);
514 if (dp
->scd_path
!= NULL
)
515 spa_strfree(dp
->scd_path
);
516 kmem_free(dp
, sizeof (spa_config_dirent_t
));
519 list_destroy(&spa
->spa_config_list
);
521 nvlist_free(spa
->spa_load_info
);
522 spa_config_set(spa
, NULL
);
524 refcount_destroy(&spa
->spa_refcount
);
526 spa_config_lock_destroy(spa
);
528 for (t
= 0; t
< TXG_SIZE
; t
++)
529 bplist_destroy(&spa
->spa_free_bplist
[t
]);
531 cv_destroy(&spa
->spa_async_cv
);
532 cv_destroy(&spa
->spa_proc_cv
);
533 cv_destroy(&spa
->spa_scrub_io_cv
);
534 cv_destroy(&spa
->spa_suspend_cv
);
536 mutex_destroy(&spa
->spa_async_lock
);
537 mutex_destroy(&spa
->spa_errlist_lock
);
538 mutex_destroy(&spa
->spa_errlog_lock
);
539 mutex_destroy(&spa
->spa_history_lock
);
540 mutex_destroy(&spa
->spa_proc_lock
);
541 mutex_destroy(&spa
->spa_props_lock
);
542 mutex_destroy(&spa
->spa_scrub_lock
);
543 mutex_destroy(&spa
->spa_suspend_lock
);
544 mutex_destroy(&spa
->spa_vdev_top_lock
);
546 kmem_free(spa
, sizeof (spa_t
));
550 * Given a pool, return the next pool in the namespace, or NULL if there is
551 * none. If 'prev' is NULL, return the first pool.
554 spa_next(spa_t
*prev
)
556 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
559 return (AVL_NEXT(&spa_namespace_avl
, prev
));
561 return (avl_first(&spa_namespace_avl
));
565 * ==========================================================================
566 * SPA refcount functions
567 * ==========================================================================
571 * Add a reference to the given spa_t. Must have at least one reference, or
572 * have the namespace lock held.
575 spa_open_ref(spa_t
*spa
, void *tag
)
577 ASSERT(refcount_count(&spa
->spa_refcount
) >= spa
->spa_minref
||
578 MUTEX_HELD(&spa_namespace_lock
));
579 (void) refcount_add(&spa
->spa_refcount
, tag
);
583 * Remove a reference to the given spa_t. Must have at least one reference, or
584 * have the namespace lock held.
587 spa_close(spa_t
*spa
, void *tag
)
589 ASSERT(refcount_count(&spa
->spa_refcount
) > spa
->spa_minref
||
590 MUTEX_HELD(&spa_namespace_lock
));
591 (void) refcount_remove(&spa
->spa_refcount
, tag
);
595 * Check to see if the spa refcount is zero. Must be called with
596 * spa_namespace_lock held. We really compare against spa_minref, which is the
597 * number of references acquired when opening a pool
600 spa_refcount_zero(spa_t
*spa
)
602 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
604 return (refcount_count(&spa
->spa_refcount
) == spa
->spa_minref
);
608 * ==========================================================================
609 * SPA spare and l2cache tracking
610 * ==========================================================================
614 * Hot spares and cache devices are tracked using the same code below,
615 * for 'auxiliary' devices.
618 typedef struct spa_aux
{
626 spa_aux_compare(const void *a
, const void *b
)
628 const spa_aux_t
*sa
= a
;
629 const spa_aux_t
*sb
= b
;
631 if (sa
->aux_guid
< sb
->aux_guid
)
633 else if (sa
->aux_guid
> sb
->aux_guid
)
640 spa_aux_add(vdev_t
*vd
, avl_tree_t
*avl
)
646 search
.aux_guid
= vd
->vdev_guid
;
647 if ((aux
= avl_find(avl
, &search
, &where
)) != NULL
) {
650 aux
= kmem_zalloc(sizeof (spa_aux_t
), KM_SLEEP
);
651 aux
->aux_guid
= vd
->vdev_guid
;
653 avl_insert(avl
, aux
, where
);
658 spa_aux_remove(vdev_t
*vd
, avl_tree_t
*avl
)
664 search
.aux_guid
= vd
->vdev_guid
;
665 aux
= avl_find(avl
, &search
, &where
);
669 if (--aux
->aux_count
== 0) {
670 avl_remove(avl
, aux
);
671 kmem_free(aux
, sizeof (spa_aux_t
));
672 } else if (aux
->aux_pool
== spa_guid(vd
->vdev_spa
)) {
673 aux
->aux_pool
= 0ULL;
678 spa_aux_exists(uint64_t guid
, uint64_t *pool
, int *refcnt
, avl_tree_t
*avl
)
680 spa_aux_t search
, *found
;
682 search
.aux_guid
= guid
;
683 found
= avl_find(avl
, &search
, NULL
);
687 *pool
= found
->aux_pool
;
694 *refcnt
= found
->aux_count
;
699 return (found
!= NULL
);
703 spa_aux_activate(vdev_t
*vd
, avl_tree_t
*avl
)
705 spa_aux_t search
, *found
;
708 search
.aux_guid
= vd
->vdev_guid
;
709 found
= avl_find(avl
, &search
, &where
);
710 ASSERT(found
!= NULL
);
711 ASSERT(found
->aux_pool
== 0ULL);
713 found
->aux_pool
= spa_guid(vd
->vdev_spa
);
717 * Spares are tracked globally due to the following constraints:
719 * - A spare may be part of multiple pools.
720 * - A spare may be added to a pool even if it's actively in use within
722 * - A spare in use in any pool can only be the source of a replacement if
723 * the target is a spare in the same pool.
725 * We keep track of all spares on the system through the use of a reference
726 * counted AVL tree. When a vdev is added as a spare, or used as a replacement
727 * spare, then we bump the reference count in the AVL tree. In addition, we set
728 * the 'vdev_isspare' member to indicate that the device is a spare (active or
729 * inactive). When a spare is made active (used to replace a device in the
730 * pool), we also keep track of which pool its been made a part of.
732 * The 'spa_spare_lock' protects the AVL tree. These functions are normally
733 * called under the spa_namespace lock as part of vdev reconfiguration. The
734 * separate spare lock exists for the status query path, which does not need to
735 * be completely consistent with respect to other vdev configuration changes.
739 spa_spare_compare(const void *a
, const void *b
)
741 return (spa_aux_compare(a
, b
));
745 spa_spare_add(vdev_t
*vd
)
747 mutex_enter(&spa_spare_lock
);
748 ASSERT(!vd
->vdev_isspare
);
749 spa_aux_add(vd
, &spa_spare_avl
);
750 vd
->vdev_isspare
= B_TRUE
;
751 mutex_exit(&spa_spare_lock
);
755 spa_spare_remove(vdev_t
*vd
)
757 mutex_enter(&spa_spare_lock
);
758 ASSERT(vd
->vdev_isspare
);
759 spa_aux_remove(vd
, &spa_spare_avl
);
760 vd
->vdev_isspare
= B_FALSE
;
761 mutex_exit(&spa_spare_lock
);
765 spa_spare_exists(uint64_t guid
, uint64_t *pool
, int *refcnt
)
769 mutex_enter(&spa_spare_lock
);
770 found
= spa_aux_exists(guid
, pool
, refcnt
, &spa_spare_avl
);
771 mutex_exit(&spa_spare_lock
);
777 spa_spare_activate(vdev_t
*vd
)
779 mutex_enter(&spa_spare_lock
);
780 ASSERT(vd
->vdev_isspare
);
781 spa_aux_activate(vd
, &spa_spare_avl
);
782 mutex_exit(&spa_spare_lock
);
786 * Level 2 ARC devices are tracked globally for the same reasons as spares.
787 * Cache devices currently only support one pool per cache device, and so
788 * for these devices the aux reference count is currently unused beyond 1.
792 spa_l2cache_compare(const void *a
, const void *b
)
794 return (spa_aux_compare(a
, b
));
798 spa_l2cache_add(vdev_t
*vd
)
800 mutex_enter(&spa_l2cache_lock
);
801 ASSERT(!vd
->vdev_isl2cache
);
802 spa_aux_add(vd
, &spa_l2cache_avl
);
803 vd
->vdev_isl2cache
= B_TRUE
;
804 mutex_exit(&spa_l2cache_lock
);
808 spa_l2cache_remove(vdev_t
*vd
)
810 mutex_enter(&spa_l2cache_lock
);
811 ASSERT(vd
->vdev_isl2cache
);
812 spa_aux_remove(vd
, &spa_l2cache_avl
);
813 vd
->vdev_isl2cache
= B_FALSE
;
814 mutex_exit(&spa_l2cache_lock
);
818 spa_l2cache_exists(uint64_t guid
, uint64_t *pool
)
822 mutex_enter(&spa_l2cache_lock
);
823 found
= spa_aux_exists(guid
, pool
, NULL
, &spa_l2cache_avl
);
824 mutex_exit(&spa_l2cache_lock
);
830 spa_l2cache_activate(vdev_t
*vd
)
832 mutex_enter(&spa_l2cache_lock
);
833 ASSERT(vd
->vdev_isl2cache
);
834 spa_aux_activate(vd
, &spa_l2cache_avl
);
835 mutex_exit(&spa_l2cache_lock
);
839 * ==========================================================================
841 * ==========================================================================
845 * Lock the given spa_t for the purpose of adding or removing a vdev.
846 * Grabs the global spa_namespace_lock plus the spa config lock for writing.
847 * It returns the next transaction group for the spa_t.
850 spa_vdev_enter(spa_t
*spa
)
852 mutex_enter(&spa
->spa_vdev_top_lock
);
853 mutex_enter(&spa_namespace_lock
);
854 return (spa_vdev_config_enter(spa
));
858 * Internal implementation for spa_vdev_enter(). Used when a vdev
859 * operation requires multiple syncs (i.e. removing a device) while
860 * keeping the spa_namespace_lock held.
863 spa_vdev_config_enter(spa_t
*spa
)
865 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
867 spa_config_enter(spa
, SCL_ALL
, spa
, RW_WRITER
);
869 return (spa_last_synced_txg(spa
) + 1);
873 * Used in combination with spa_vdev_config_enter() to allow the syncing
874 * of multiple transactions without releasing the spa_namespace_lock.
877 spa_vdev_config_exit(spa_t
*spa
, vdev_t
*vd
, uint64_t txg
, int error
, char *tag
)
879 int config_changed
= B_FALSE
;
881 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
882 ASSERT(txg
> spa_last_synced_txg(spa
));
884 spa
->spa_pending_vdev
= NULL
;
889 vdev_dtl_reassess(spa
->spa_root_vdev
, 0, 0, B_FALSE
);
891 if (error
== 0 && !list_is_empty(&spa
->spa_config_dirty_list
)) {
892 config_changed
= B_TRUE
;
893 spa
->spa_config_generation
++;
897 * Verify the metaslab classes.
899 ASSERT(metaslab_class_validate(spa_normal_class(spa
)) == 0);
900 ASSERT(metaslab_class_validate(spa_log_class(spa
)) == 0);
902 spa_config_exit(spa
, SCL_ALL
, spa
);
905 * Panic the system if the specified tag requires it. This
906 * is useful for ensuring that configurations are updated
909 if (zio_injection_enabled
)
910 zio_handle_panic_injection(spa
, tag
, 0);
913 * Note: this txg_wait_synced() is important because it ensures
914 * that there won't be more than one config change per txg.
915 * This allows us to use the txg as the generation number.
918 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
921 ASSERT(!vd
->vdev_detached
|| vd
->vdev_dtl_smo
.smo_object
== 0);
922 spa_config_enter(spa
, SCL_ALL
, spa
, RW_WRITER
);
924 spa_config_exit(spa
, SCL_ALL
, spa
);
928 * If the config changed, update the config cache.
931 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
935 * Unlock the spa_t after adding or removing a vdev. Besides undoing the
936 * locking of spa_vdev_enter(), we also want make sure the transactions have
937 * synced to disk, and then update the global configuration cache with the new
941 spa_vdev_exit(spa_t
*spa
, vdev_t
*vd
, uint64_t txg
, int error
)
943 spa_vdev_config_exit(spa
, vd
, txg
, error
, FTAG
);
944 mutex_exit(&spa_namespace_lock
);
945 mutex_exit(&spa
->spa_vdev_top_lock
);
951 * Lock the given spa_t for the purpose of changing vdev state.
954 spa_vdev_state_enter(spa_t
*spa
, int oplocks
)
956 int locks
= SCL_STATE_ALL
| oplocks
;
959 * Root pools may need to read of the underlying devfs filesystem
960 * when opening up a vdev. Unfortunately if we're holding the
961 * SCL_ZIO lock it will result in a deadlock when we try to issue
962 * the read from the root filesystem. Instead we "prefetch"
963 * the associated vnodes that we need prior to opening the
964 * underlying devices and cache them so that we can prevent
965 * any I/O when we are doing the actual open.
967 if (spa_is_root(spa
)) {
968 int low
= locks
& ~(SCL_ZIO
- 1);
969 int high
= locks
& ~low
;
971 spa_config_enter(spa
, high
, spa
, RW_WRITER
);
972 vdev_hold(spa
->spa_root_vdev
);
973 spa_config_enter(spa
, low
, spa
, RW_WRITER
);
975 spa_config_enter(spa
, locks
, spa
, RW_WRITER
);
977 spa
->spa_vdev_locks
= locks
;
981 spa_vdev_state_exit(spa_t
*spa
, vdev_t
*vd
, int error
)
983 boolean_t config_changed
= B_FALSE
;
985 if (vd
!= NULL
|| error
== 0)
986 vdev_dtl_reassess(vd
? vd
->vdev_top
: spa
->spa_root_vdev
,
990 vdev_state_dirty(vd
->vdev_top
);
991 config_changed
= B_TRUE
;
992 spa
->spa_config_generation
++;
995 if (spa_is_root(spa
))
996 vdev_rele(spa
->spa_root_vdev
);
998 ASSERT3U(spa
->spa_vdev_locks
, >=, SCL_STATE_ALL
);
999 spa_config_exit(spa
, spa
->spa_vdev_locks
, spa
);
1002 * If anything changed, wait for it to sync. This ensures that,
1003 * from the system administrator's perspective, zpool(1M) commands
1004 * are synchronous. This is important for things like zpool offline:
1005 * when the command completes, you expect no further I/O from ZFS.
1008 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1011 * If the config changed, update the config cache.
1013 if (config_changed
) {
1014 mutex_enter(&spa_namespace_lock
);
1015 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
1016 mutex_exit(&spa_namespace_lock
);
1023 * ==========================================================================
1024 * Miscellaneous functions
1025 * ==========================================================================
1032 spa_rename(const char *name
, const char *newname
)
1038 * Lookup the spa_t and grab the config lock for writing. We need to
1039 * actually open the pool so that we can sync out the necessary labels.
1040 * It's OK to call spa_open() with the namespace lock held because we
1041 * allow recursive calls for other reasons.
1043 mutex_enter(&spa_namespace_lock
);
1044 if ((err
= spa_open(name
, &spa
, FTAG
)) != 0) {
1045 mutex_exit(&spa_namespace_lock
);
1049 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1051 avl_remove(&spa_namespace_avl
, spa
);
1052 (void) strlcpy(spa
->spa_name
, newname
, sizeof (spa
->spa_name
));
1053 avl_add(&spa_namespace_avl
, spa
);
1056 * Sync all labels to disk with the new names by marking the root vdev
1057 * dirty and waiting for it to sync. It will pick up the new pool name
1060 vdev_config_dirty(spa
->spa_root_vdev
);
1062 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1064 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1067 * Sync the updated config cache.
1069 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
1071 spa_close(spa
, FTAG
);
1073 mutex_exit(&spa_namespace_lock
);
1079 * Return the spa_t associated with given pool_guid, if it exists. If
1080 * device_guid is non-zero, determine whether the pool exists *and* contains
1081 * a device with the specified device_guid.
1084 spa_by_guid(uint64_t pool_guid
, uint64_t device_guid
)
1087 avl_tree_t
*t
= &spa_namespace_avl
;
1089 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1091 for (spa
= avl_first(t
); spa
!= NULL
; spa
= AVL_NEXT(t
, spa
)) {
1092 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
)
1094 if (spa
->spa_root_vdev
== NULL
)
1096 if (spa_guid(spa
) == pool_guid
) {
1097 if (device_guid
== 0)
1100 if (vdev_lookup_by_guid(spa
->spa_root_vdev
,
1101 device_guid
) != NULL
)
1105 * Check any devices we may be in the process of adding.
1107 if (spa
->spa_pending_vdev
) {
1108 if (vdev_lookup_by_guid(spa
->spa_pending_vdev
,
1109 device_guid
) != NULL
)
1119 * Determine whether a pool with the given pool_guid exists.
1122 spa_guid_exists(uint64_t pool_guid
, uint64_t device_guid
)
1124 return (spa_by_guid(pool_guid
, device_guid
) != NULL
);
1128 spa_strdup(const char *s
)
1134 new = kmem_alloc(len
+ 1, KM_SLEEP
);
1142 spa_strfree(char *s
)
1144 kmem_free(s
, strlen(s
) + 1);
1148 spa_get_random(uint64_t range
)
1154 (void) random_get_pseudo_bytes((void *)&r
, sizeof (uint64_t));
1160 spa_generate_guid(spa_t
*spa
)
1162 uint64_t guid
= spa_get_random(-1ULL);
1165 while (guid
== 0 || spa_guid_exists(spa_guid(spa
), guid
))
1166 guid
= spa_get_random(-1ULL);
1168 while (guid
== 0 || spa_guid_exists(guid
, 0))
1169 guid
= spa_get_random(-1ULL);
1176 sprintf_blkptr(char *buf
, const blkptr_t
*bp
)
1179 char *checksum
= NULL
;
1180 char *compress
= NULL
;
1183 type
= dmu_ot
[BP_GET_TYPE(bp
)].ot_name
;
1184 checksum
= zio_checksum_table
[BP_GET_CHECKSUM(bp
)].ci_name
;
1185 compress
= zio_compress_table
[BP_GET_COMPRESS(bp
)].ci_name
;
1188 SPRINTF_BLKPTR(snprintf
, ' ', buf
, bp
, type
, checksum
, compress
);
1192 spa_freeze(spa_t
*spa
)
1194 uint64_t freeze_txg
= 0;
1196 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1197 if (spa
->spa_freeze_txg
== UINT64_MAX
) {
1198 freeze_txg
= spa_last_synced_txg(spa
) + TXG_SIZE
;
1199 spa
->spa_freeze_txg
= freeze_txg
;
1201 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1202 if (freeze_txg
!= 0)
1203 txg_wait_synced(spa_get_dsl(spa
), freeze_txg
);
1207 * This is a stripped-down version of strtoull, suitable only for converting
1208 * lowercase hexidecimal numbers that don't overflow.
1211 strtonum(const char *str
, char **nptr
)
1217 while ((c
= *str
) != '\0') {
1218 if (c
>= '0' && c
<= '9')
1220 else if (c
>= 'a' && c
<= 'f')
1221 digit
= 10 + c
- 'a';
1232 *nptr
= (char *)str
;
1238 * ==========================================================================
1239 * Accessor functions
1240 * ==========================================================================
1244 spa_shutting_down(spa_t
*spa
)
1246 return (spa
->spa_async_suspended
);
1250 spa_get_dsl(spa_t
*spa
)
1252 return (spa
->spa_dsl_pool
);
1256 spa_get_rootblkptr(spa_t
*spa
)
1258 return (&spa
->spa_ubsync
.ub_rootbp
);
1262 spa_set_rootblkptr(spa_t
*spa
, const blkptr_t
*bp
)
1264 spa
->spa_uberblock
.ub_rootbp
= *bp
;
1268 spa_altroot(spa_t
*spa
, char *buf
, size_t buflen
)
1270 if (spa
->spa_root
== NULL
)
1273 (void) strncpy(buf
, spa
->spa_root
, buflen
);
1277 spa_sync_pass(spa_t
*spa
)
1279 return (spa
->spa_sync_pass
);
1283 spa_name(spa_t
*spa
)
1285 return (spa
->spa_name
);
1289 spa_guid(spa_t
*spa
)
1292 * If we fail to parse the config during spa_load(), we can go through
1293 * the error path (which posts an ereport) and end up here with no root
1294 * vdev. We stash the original pool guid in 'spa_config_guid' to handle
1297 if (spa
->spa_root_vdev
!= NULL
)
1298 return (spa
->spa_root_vdev
->vdev_guid
);
1300 return (spa
->spa_config_guid
);
1304 spa_load_guid(spa_t
*spa
)
1307 * This is a GUID that exists solely as a reference for the
1308 * purposes of the arc. It is generated at load time, and
1309 * is never written to persistent storage.
1311 return (spa
->spa_load_guid
);
1315 spa_last_synced_txg(spa_t
*spa
)
1317 return (spa
->spa_ubsync
.ub_txg
);
1321 spa_first_txg(spa_t
*spa
)
1323 return (spa
->spa_first_txg
);
1327 spa_syncing_txg(spa_t
*spa
)
1329 return (spa
->spa_syncing_txg
);
1333 spa_state(spa_t
*spa
)
1335 return (spa
->spa_state
);
1339 spa_load_state(spa_t
*spa
)
1341 return (spa
->spa_load_state
);
1345 spa_freeze_txg(spa_t
*spa
)
1347 return (spa
->spa_freeze_txg
);
1352 spa_get_asize(spa_t
*spa
, uint64_t lsize
)
1355 * The worst case is single-sector max-parity RAID-Z blocks, in which
1356 * case the space requirement is exactly (VDEV_RAIDZ_MAXPARITY + 1)
1357 * times the size; so just assume that. Add to this the fact that
1358 * we can have up to 3 DVAs per bp, and one more factor of 2 because
1359 * the block may be dittoed with up to 3 DVAs by ddt_sync().
1361 return (lsize
* (VDEV_RAIDZ_MAXPARITY
+ 1) * SPA_DVAS_PER_BP
* 2);
1365 spa_get_dspace(spa_t
*spa
)
1367 return (spa
->spa_dspace
);
1371 spa_update_dspace(spa_t
*spa
)
1373 spa
->spa_dspace
= metaslab_class_get_dspace(spa_normal_class(spa
)) +
1374 ddt_get_dedup_dspace(spa
);
1378 * Return the failure mode that has been set to this pool. The default
1379 * behavior will be to block all I/Os when a complete failure occurs.
1382 spa_get_failmode(spa_t
*spa
)
1384 return (spa
->spa_failmode
);
1388 spa_suspended(spa_t
*spa
)
1390 return (spa
->spa_suspended
);
1394 spa_version(spa_t
*spa
)
1396 return (spa
->spa_ubsync
.ub_version
);
1400 spa_deflate(spa_t
*spa
)
1402 return (spa
->spa_deflate
);
1406 spa_normal_class(spa_t
*spa
)
1408 return (spa
->spa_normal_class
);
1412 spa_log_class(spa_t
*spa
)
1414 return (spa
->spa_log_class
);
1418 spa_max_replication(spa_t
*spa
)
1421 * As of SPA_VERSION == SPA_VERSION_DITTO_BLOCKS, we are able to
1422 * handle BPs with more than one DVA allocated. Set our max
1423 * replication level accordingly.
1425 if (spa_version(spa
) < SPA_VERSION_DITTO_BLOCKS
)
1427 return (MIN(SPA_DVAS_PER_BP
, spa_max_replication_override
));
1431 spa_prev_software_version(spa_t
*spa
)
1433 return (spa
->spa_prev_software_version
);
1437 dva_get_dsize_sync(spa_t
*spa
, const dva_t
*dva
)
1439 uint64_t asize
= DVA_GET_ASIZE(dva
);
1440 uint64_t dsize
= asize
;
1442 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_READER
) != 0);
1444 if (asize
!= 0 && spa
->spa_deflate
) {
1445 vdev_t
*vd
= vdev_lookup_top(spa
, DVA_GET_VDEV(dva
));
1446 dsize
= (asize
>> SPA_MINBLOCKSHIFT
) * vd
->vdev_deflate_ratio
;
1453 bp_get_dsize_sync(spa_t
*spa
, const blkptr_t
*bp
)
1458 for (d
= 0; d
< SPA_DVAS_PER_BP
; d
++)
1459 dsize
+= dva_get_dsize_sync(spa
, &bp
->blk_dva
[d
]);
1465 bp_get_dsize(spa_t
*spa
, const blkptr_t
*bp
)
1470 spa_config_enter(spa
, SCL_VDEV
, FTAG
, RW_READER
);
1472 for (d
= 0; d
< SPA_DVAS_PER_BP
; d
++)
1473 dsize
+= dva_get_dsize_sync(spa
, &bp
->blk_dva
[d
]);
1475 spa_config_exit(spa
, SCL_VDEV
, FTAG
);
1481 * ==========================================================================
1482 * Initialization and Termination
1483 * ==========================================================================
1487 spa_name_compare(const void *a1
, const void *a2
)
1489 const spa_t
*s1
= a1
;
1490 const spa_t
*s2
= a2
;
1493 s
= strcmp(s1
->spa_name
, s2
->spa_name
);
1510 mutex_init(&spa_namespace_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
1511 mutex_init(&spa_spare_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
1512 mutex_init(&spa_l2cache_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
1513 cv_init(&spa_namespace_cv
, NULL
, CV_DEFAULT
, NULL
);
1515 avl_create(&spa_namespace_avl
, spa_name_compare
, sizeof (spa_t
),
1516 offsetof(spa_t
, spa_avl
));
1518 avl_create(&spa_spare_avl
, spa_spare_compare
, sizeof (spa_aux_t
),
1519 offsetof(spa_aux_t
, aux_avl
));
1521 avl_create(&spa_l2cache_avl
, spa_l2cache_compare
, sizeof (spa_aux_t
),
1522 offsetof(spa_aux_t
, aux_avl
));
1524 spa_mode_global
= mode
;
1532 vdev_cache_stat_init();
1546 vdev_cache_stat_fini();
1554 avl_destroy(&spa_namespace_avl
);
1555 avl_destroy(&spa_spare_avl
);
1556 avl_destroy(&spa_l2cache_avl
);
1558 cv_destroy(&spa_namespace_cv
);
1559 mutex_destroy(&spa_namespace_lock
);
1560 mutex_destroy(&spa_spare_lock
);
1561 mutex_destroy(&spa_l2cache_lock
);
1565 * Return whether this pool has slogs. No locking needed.
1566 * It's not a problem if the wrong answer is returned as it's only for
1567 * performance and not correctness
1570 spa_has_slogs(spa_t
*spa
)
1572 return (spa
->spa_log_class
->mc_rotor
!= NULL
);
1576 spa_get_log_state(spa_t
*spa
)
1578 return (spa
->spa_log_state
);
1582 spa_set_log_state(spa_t
*spa
, spa_log_state_t state
)
1584 spa
->spa_log_state
= state
;
1588 spa_is_root(spa_t
*spa
)
1590 return (spa
->spa_is_root
);
1594 spa_writeable(spa_t
*spa
)
1596 return (!!(spa
->spa_mode
& FWRITE
));
1600 spa_mode(spa_t
*spa
)
1602 return (spa
->spa_mode
);
1606 spa_bootfs(spa_t
*spa
)
1608 return (spa
->spa_bootfs
);
1612 spa_delegation(spa_t
*spa
)
1614 return (spa
->spa_delegation
);
1618 spa_meta_objset(spa_t
*spa
)
1620 return (spa
->spa_meta_objset
);
1624 spa_dedup_checksum(spa_t
*spa
)
1626 return (spa
->spa_dedup_checksum
);
1630 * Reset pool scan stat per scan pass (or reboot).
1633 spa_scan_stat_init(spa_t
*spa
)
1635 /* data not stored on disk */
1636 spa
->spa_scan_pass_start
= gethrestime_sec();
1637 spa
->spa_scan_pass_exam
= 0;
1638 vdev_scan_stat_init(spa
->spa_root_vdev
);
1642 * Get scan stats for zpool status reports
1645 spa_scan_get_stats(spa_t
*spa
, pool_scan_stat_t
*ps
)
1647 dsl_scan_t
*scn
= spa
->spa_dsl_pool
? spa
->spa_dsl_pool
->dp_scan
: NULL
;
1649 if (scn
== NULL
|| scn
->scn_phys
.scn_func
== POOL_SCAN_NONE
)
1651 bzero(ps
, sizeof (pool_scan_stat_t
));
1653 /* data stored on disk */
1654 ps
->pss_func
= scn
->scn_phys
.scn_func
;
1655 ps
->pss_start_time
= scn
->scn_phys
.scn_start_time
;
1656 ps
->pss_end_time
= scn
->scn_phys
.scn_end_time
;
1657 ps
->pss_to_examine
= scn
->scn_phys
.scn_to_examine
;
1658 ps
->pss_examined
= scn
->scn_phys
.scn_examined
;
1659 ps
->pss_to_process
= scn
->scn_phys
.scn_to_process
;
1660 ps
->pss_processed
= scn
->scn_phys
.scn_processed
;
1661 ps
->pss_errors
= scn
->scn_phys
.scn_errors
;
1662 ps
->pss_state
= scn
->scn_phys
.scn_state
;
1664 /* data not stored on disk */
1665 ps
->pss_pass_start
= spa
->spa_scan_pass_start
;
1666 ps
->pss_pass_exam
= spa
->spa_scan_pass_exam
;
1672 spa_debug_enabled(spa_t
*spa
)
1674 return (spa
->spa_debug
);
1677 #if defined(_KERNEL) && defined(HAVE_SPL)
1678 /* Namespace manipulation */
1679 EXPORT_SYMBOL(spa_lookup
);
1680 EXPORT_SYMBOL(spa_add
);
1681 EXPORT_SYMBOL(spa_remove
);
1682 EXPORT_SYMBOL(spa_next
);
1684 /* Refcount functions */
1685 EXPORT_SYMBOL(spa_open_ref
);
1686 EXPORT_SYMBOL(spa_close
);
1687 EXPORT_SYMBOL(spa_refcount_zero
);
1689 /* Pool configuration lock */
1690 EXPORT_SYMBOL(spa_config_tryenter
);
1691 EXPORT_SYMBOL(spa_config_enter
);
1692 EXPORT_SYMBOL(spa_config_exit
);
1693 EXPORT_SYMBOL(spa_config_held
);
1695 /* Pool vdev add/remove lock */
1696 EXPORT_SYMBOL(spa_vdev_enter
);
1697 EXPORT_SYMBOL(spa_vdev_exit
);
1699 /* Pool vdev state change lock */
1700 EXPORT_SYMBOL(spa_vdev_state_enter
);
1701 EXPORT_SYMBOL(spa_vdev_state_exit
);
1703 /* Accessor functions */
1704 EXPORT_SYMBOL(spa_shutting_down
);
1705 EXPORT_SYMBOL(spa_get_dsl
);
1706 EXPORT_SYMBOL(spa_get_rootblkptr
);
1707 EXPORT_SYMBOL(spa_set_rootblkptr
);
1708 EXPORT_SYMBOL(spa_altroot
);
1709 EXPORT_SYMBOL(spa_sync_pass
);
1710 EXPORT_SYMBOL(spa_name
);
1711 EXPORT_SYMBOL(spa_guid
);
1712 EXPORT_SYMBOL(spa_last_synced_txg
);
1713 EXPORT_SYMBOL(spa_first_txg
);
1714 EXPORT_SYMBOL(spa_syncing_txg
);
1715 EXPORT_SYMBOL(spa_version
);
1716 EXPORT_SYMBOL(spa_state
);
1717 EXPORT_SYMBOL(spa_load_state
);
1718 EXPORT_SYMBOL(spa_freeze_txg
);
1719 EXPORT_SYMBOL(spa_get_asize
);
1720 EXPORT_SYMBOL(spa_get_dspace
);
1721 EXPORT_SYMBOL(spa_update_dspace
);
1722 EXPORT_SYMBOL(spa_deflate
);
1723 EXPORT_SYMBOL(spa_normal_class
);
1724 EXPORT_SYMBOL(spa_log_class
);
1725 EXPORT_SYMBOL(spa_max_replication
);
1726 EXPORT_SYMBOL(spa_prev_software_version
);
1727 EXPORT_SYMBOL(spa_get_failmode
);
1728 EXPORT_SYMBOL(spa_suspended
);
1729 EXPORT_SYMBOL(spa_bootfs
);
1730 EXPORT_SYMBOL(spa_delegation
);
1731 EXPORT_SYMBOL(spa_meta_objset
);
1733 /* Miscellaneous support routines */
1734 EXPORT_SYMBOL(spa_rename
);
1735 EXPORT_SYMBOL(spa_guid_exists
);
1736 EXPORT_SYMBOL(spa_strdup
);
1737 EXPORT_SYMBOL(spa_strfree
);
1738 EXPORT_SYMBOL(spa_get_random
);
1739 EXPORT_SYMBOL(spa_generate_guid
);
1740 EXPORT_SYMBOL(sprintf_blkptr
);
1741 EXPORT_SYMBOL(spa_freeze
);
1742 EXPORT_SYMBOL(spa_upgrade
);
1743 EXPORT_SYMBOL(spa_evict_all
);
1744 EXPORT_SYMBOL(spa_lookup_by_guid
);
1745 EXPORT_SYMBOL(spa_has_spare
);
1746 EXPORT_SYMBOL(dva_get_dsize_sync
);
1747 EXPORT_SYMBOL(bp_get_dsize_sync
);
1748 EXPORT_SYMBOL(bp_get_dsize
);
1749 EXPORT_SYMBOL(spa_has_slogs
);
1750 EXPORT_SYMBOL(spa_is_root
);
1751 EXPORT_SYMBOL(spa_writeable
);
1752 EXPORT_SYMBOL(spa_mode
);
1754 EXPORT_SYMBOL(spa_namespace_lock
);