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.
25 #include <sys/zfs_context.h>
26 #include <sys/spa_impl.h>
28 #include <sys/zio_checksum.h>
29 #include <sys/zio_compress.h>
31 #include <sys/dmu_tx.h>
34 #include <sys/vdev_impl.h>
35 #include <sys/metaslab.h>
36 #include <sys/uberblock_impl.h>
39 #include <sys/unique.h>
40 #include <sys/dsl_pool.h>
41 #include <sys/dsl_dir.h>
42 #include <sys/dsl_prop.h>
43 #include <sys/fm/util.h>
44 #include <sys/dsl_scan.h>
45 #include <sys/fs/zfs.h>
46 #include <sys/metaslab_impl.h>
54 * There are four basic locks for managing spa_t structures:
56 * spa_namespace_lock (global mutex)
58 * This lock must be acquired to do any of the following:
60 * - Lookup a spa_t by name
61 * - Add or remove a spa_t from the namespace
62 * - Increase spa_refcount from non-zero
63 * - Check if spa_refcount is zero
65 * - add/remove/attach/detach devices
66 * - Held for the duration of create/destroy/import/export
68 * It does not need to handle recursion. A create or destroy may
69 * reference objects (files or zvols) in other pools, but by
70 * definition they must have an existing reference, and will never need
71 * to lookup a spa_t by name.
73 * spa_refcount (per-spa refcount_t protected by mutex)
75 * This reference count keep track of any active users of the spa_t. The
76 * spa_t cannot be destroyed or freed while this is non-zero. Internally,
77 * the refcount is never really 'zero' - opening a pool implicitly keeps
78 * some references in the DMU. Internally we check against spa_minref, but
79 * present the image of a zero/non-zero value to consumers.
81 * spa_config_lock[] (per-spa array of rwlocks)
83 * This protects the spa_t from config changes, and must be held in
84 * the following circumstances:
86 * - RW_READER to perform I/O to the spa
87 * - RW_WRITER to change the vdev config
89 * The locking order is fairly straightforward:
91 * spa_namespace_lock -> spa_refcount
93 * The namespace lock must be acquired to increase the refcount from 0
94 * or to check if it is zero.
96 * spa_refcount -> spa_config_lock[]
98 * There must be at least one valid reference on the spa_t to acquire
101 * spa_namespace_lock -> spa_config_lock[]
103 * The namespace lock must always be taken before the config lock.
106 * The spa_namespace_lock can be acquired directly and is globally visible.
108 * The namespace is manipulated using the following functions, all of which
109 * require the spa_namespace_lock to be held.
111 * spa_lookup() Lookup a spa_t by name.
113 * spa_add() Create a new spa_t in the namespace.
115 * spa_remove() Remove a spa_t from the namespace. This also
116 * frees up any memory associated with the spa_t.
118 * spa_next() Returns the next spa_t in the system, or the
119 * first if NULL is passed.
121 * spa_evict_all() Shutdown and remove all spa_t structures in
124 * spa_guid_exists() Determine whether a pool/device guid exists.
126 * The spa_refcount is manipulated using the following functions:
128 * spa_open_ref() Adds a reference to the given spa_t. Must be
129 * called with spa_namespace_lock held if the
130 * refcount is currently zero.
132 * spa_close() Remove a reference from the spa_t. This will
133 * not free the spa_t or remove it from the
134 * namespace. No locking is required.
136 * spa_refcount_zero() Returns true if the refcount is currently
137 * zero. Must be called with spa_namespace_lock
140 * The spa_config_lock[] is an array of rwlocks, ordered as follows:
141 * SCL_CONFIG > SCL_STATE > SCL_ALLOC > SCL_ZIO > SCL_FREE > SCL_VDEV.
142 * spa_config_lock[] is manipulated with spa_config_{enter,exit,held}().
144 * To read the configuration, it suffices to hold one of these locks as reader.
145 * To modify the configuration, you must hold all locks as writer. To modify
146 * vdev state without altering the vdev tree's topology (e.g. online/offline),
147 * you must hold SCL_STATE and SCL_ZIO as writer.
149 * We use these distinct config locks to avoid recursive lock entry.
150 * For example, spa_sync() (which holds SCL_CONFIG as reader) induces
151 * block allocations (SCL_ALLOC), which may require reading space maps
152 * from disk (dmu_read() -> zio_read() -> SCL_ZIO).
154 * The spa config locks cannot be normal rwlocks because we need the
155 * ability to hand off ownership. For example, SCL_ZIO is acquired
156 * by the issuing thread and later released by an interrupt thread.
157 * They do, however, obey the usual write-wanted semantics to prevent
158 * writer (i.e. system administrator) starvation.
160 * The lock acquisition rules are as follows:
163 * Protects changes to the vdev tree topology, such as vdev
164 * add/remove/attach/detach. Protects the dirty config list
165 * (spa_config_dirty_list) and the set of spares and l2arc devices.
168 * Protects changes to pool state and vdev state, such as vdev
169 * online/offline/fault/degrade/clear. Protects the dirty state list
170 * (spa_state_dirty_list) and global pool state (spa_state).
173 * Protects changes to metaslab groups and classes.
174 * Held as reader by metaslab_alloc() and metaslab_claim().
177 * Held by bp-level zios (those which have no io_vd upon entry)
178 * to prevent changes to the vdev tree. The bp-level zio implicitly
179 * protects all of its vdev child zios, which do not hold SCL_ZIO.
182 * Protects changes to metaslab groups and classes.
183 * Held as reader by metaslab_free(). SCL_FREE is distinct from
184 * SCL_ALLOC, and lower than SCL_ZIO, so that we can safely free
185 * blocks in zio_done() while another i/o that holds either
186 * SCL_ALLOC or SCL_ZIO is waiting for this i/o to complete.
189 * Held as reader to prevent changes to the vdev tree during trivial
190 * inquiries such as bp_get_dsize(). SCL_VDEV is distinct from the
191 * other locks, and lower than all of them, to ensure that it's safe
192 * to acquire regardless of caller context.
194 * In addition, the following rules apply:
196 * (a) spa_props_lock protects pool properties, spa_config and spa_config_list.
197 * The lock ordering is SCL_CONFIG > spa_props_lock.
199 * (b) I/O operations on leaf vdevs. For any zio operation that takes
200 * an explicit vdev_t argument -- such as zio_ioctl(), zio_read_phys(),
201 * or zio_write_phys() -- the caller must ensure that the config cannot
202 * cannot change in the interim, and that the vdev cannot be reopened.
203 * SCL_STATE as reader suffices for both.
205 * The vdev configuration is protected by spa_vdev_enter() / spa_vdev_exit().
207 * spa_vdev_enter() Acquire the namespace lock and the config lock
210 * spa_vdev_exit() Release the config lock, wait for all I/O
211 * to complete, sync the updated configs to the
212 * cache, and release the namespace lock.
214 * vdev state is protected by spa_vdev_state_enter() / spa_vdev_state_exit().
215 * Like spa_vdev_enter/exit, these are convenience wrappers -- the actual
216 * locking is, always, based on spa_namespace_lock and spa_config_lock[].
218 * spa_rename() is also implemented within this file since is requires
219 * manipulation of the namespace.
222 static avl_tree_t spa_namespace_avl
;
223 kmutex_t spa_namespace_lock
;
224 static kcondvar_t spa_namespace_cv
;
225 static int spa_active_count
;
226 int spa_max_replication_override
= SPA_DVAS_PER_BP
;
228 static kmutex_t spa_spare_lock
;
229 static avl_tree_t spa_spare_avl
;
230 static kmutex_t spa_l2cache_lock
;
231 static avl_tree_t spa_l2cache_avl
;
233 kmem_cache_t
*spa_buffer_pool
;
237 /* Everything except dprintf is on by default in debug builds */
238 int zfs_flags
= ~ZFS_DEBUG_DPRINTF
;
244 * zfs_recover can be set to nonzero to attempt to recover from
245 * otherwise-fatal errors, typically caused by on-disk corruption. When
246 * set, calls to zfs_panic_recover() will turn into warning messages.
252 * ==========================================================================
254 * ==========================================================================
257 spa_config_lock_init(spa_t
*spa
)
261 for (i
= 0; i
< SCL_LOCKS
; i
++) {
262 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
263 mutex_init(&scl
->scl_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
264 cv_init(&scl
->scl_cv
, NULL
, CV_DEFAULT
, NULL
);
265 refcount_create(&scl
->scl_count
);
266 scl
->scl_writer
= NULL
;
267 scl
->scl_write_wanted
= 0;
272 spa_config_lock_destroy(spa_t
*spa
)
276 for (i
= 0; i
< SCL_LOCKS
; i
++) {
277 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
278 mutex_destroy(&scl
->scl_lock
);
279 cv_destroy(&scl
->scl_cv
);
280 refcount_destroy(&scl
->scl_count
);
281 ASSERT(scl
->scl_writer
== NULL
);
282 ASSERT(scl
->scl_write_wanted
== 0);
287 spa_config_tryenter(spa_t
*spa
, int locks
, void *tag
, krw_t rw
)
291 for (i
= 0; i
< SCL_LOCKS
; i
++) {
292 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
293 if (!(locks
& (1 << i
)))
295 mutex_enter(&scl
->scl_lock
);
296 if (rw
== RW_READER
) {
297 if (scl
->scl_writer
|| scl
->scl_write_wanted
) {
298 mutex_exit(&scl
->scl_lock
);
299 spa_config_exit(spa
, locks
^ (1 << i
), tag
);
303 ASSERT(scl
->scl_writer
!= curthread
);
304 if (!refcount_is_zero(&scl
->scl_count
)) {
305 mutex_exit(&scl
->scl_lock
);
306 spa_config_exit(spa
, locks
^ (1 << i
), tag
);
309 scl
->scl_writer
= curthread
;
311 (void) refcount_add(&scl
->scl_count
, tag
);
312 mutex_exit(&scl
->scl_lock
);
318 spa_config_enter(spa_t
*spa
, int locks
, void *tag
, krw_t rw
)
323 for (i
= 0; i
< SCL_LOCKS
; i
++) {
324 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
325 if (scl
->scl_writer
== curthread
)
326 wlocks_held
|= (1 << i
);
327 if (!(locks
& (1 << i
)))
329 mutex_enter(&scl
->scl_lock
);
330 if (rw
== RW_READER
) {
331 while (scl
->scl_writer
|| scl
->scl_write_wanted
) {
332 cv_wait(&scl
->scl_cv
, &scl
->scl_lock
);
335 ASSERT(scl
->scl_writer
!= curthread
);
336 while (!refcount_is_zero(&scl
->scl_count
)) {
337 scl
->scl_write_wanted
++;
338 cv_wait(&scl
->scl_cv
, &scl
->scl_lock
);
339 scl
->scl_write_wanted
--;
341 scl
->scl_writer
= curthread
;
343 (void) refcount_add(&scl
->scl_count
, tag
);
344 mutex_exit(&scl
->scl_lock
);
346 ASSERT(wlocks_held
<= locks
);
350 spa_config_exit(spa_t
*spa
, int locks
, void *tag
)
354 for (i
= SCL_LOCKS
- 1; i
>= 0; i
--) {
355 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
356 if (!(locks
& (1 << i
)))
358 mutex_enter(&scl
->scl_lock
);
359 ASSERT(!refcount_is_zero(&scl
->scl_count
));
360 if (refcount_remove(&scl
->scl_count
, tag
) == 0) {
361 ASSERT(scl
->scl_writer
== NULL
||
362 scl
->scl_writer
== curthread
);
363 scl
->scl_writer
= NULL
; /* OK in either case */
364 cv_broadcast(&scl
->scl_cv
);
366 mutex_exit(&scl
->scl_lock
);
371 spa_config_held(spa_t
*spa
, int locks
, krw_t rw
)
373 int i
, locks_held
= 0;
375 for (i
= 0; i
< SCL_LOCKS
; i
++) {
376 spa_config_lock_t
*scl
= &spa
->spa_config_lock
[i
];
377 if (!(locks
& (1 << i
)))
379 if ((rw
== RW_READER
&& !refcount_is_zero(&scl
->scl_count
)) ||
380 (rw
== RW_WRITER
&& scl
->scl_writer
== curthread
))
381 locks_held
|= 1 << i
;
388 * ==========================================================================
389 * SPA namespace functions
390 * ==========================================================================
394 * Lookup the named spa_t in the AVL tree. The spa_namespace_lock must be held.
395 * Returns NULL if no matching spa_t is found.
398 spa_lookup(const char *name
)
400 static spa_t search
; /* spa_t is large; don't allocate on stack */
406 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
409 * If it's a full dataset name, figure out the pool name and
412 cp
= strpbrk(name
, "/@");
418 (void) strlcpy(search
.spa_name
, name
, sizeof (search
.spa_name
));
419 spa
= avl_find(&spa_namespace_avl
, &search
, &where
);
428 * Create an uninitialized spa_t with the given name. Requires
429 * spa_namespace_lock. The caller must ensure that the spa_t doesn't already
430 * exist by calling spa_lookup() first.
433 spa_add(const char *name
, nvlist_t
*config
, const char *altroot
)
436 spa_config_dirent_t
*dp
;
439 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
441 spa
= kmem_zalloc(sizeof (spa_t
), KM_SLEEP
| KM_NODEBUG
);
443 mutex_init(&spa
->spa_async_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
444 mutex_init(&spa
->spa_errlist_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
445 mutex_init(&spa
->spa_errlog_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
446 mutex_init(&spa
->spa_history_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
447 mutex_init(&spa
->spa_proc_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
448 mutex_init(&spa
->spa_props_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
449 mutex_init(&spa
->spa_scrub_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
450 mutex_init(&spa
->spa_suspend_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
451 mutex_init(&spa
->spa_vdev_top_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
453 cv_init(&spa
->spa_async_cv
, NULL
, CV_DEFAULT
, NULL
);
454 cv_init(&spa
->spa_proc_cv
, NULL
, CV_DEFAULT
, NULL
);
455 cv_init(&spa
->spa_scrub_io_cv
, NULL
, CV_DEFAULT
, NULL
);
456 cv_init(&spa
->spa_suspend_cv
, NULL
, CV_DEFAULT
, NULL
);
458 for (t
= 0; t
< TXG_SIZE
; t
++)
459 bplist_create(&spa
->spa_free_bplist
[t
]);
461 (void) strlcpy(spa
->spa_name
, name
, sizeof (spa
->spa_name
));
462 spa
->spa_state
= POOL_STATE_UNINITIALIZED
;
463 spa
->spa_freeze_txg
= UINT64_MAX
;
464 spa
->spa_final_txg
= UINT64_MAX
;
465 spa
->spa_load_max_txg
= UINT64_MAX
;
467 spa
->spa_proc_state
= SPA_PROC_NONE
;
469 refcount_create(&spa
->spa_refcount
);
470 spa_config_lock_init(spa
);
472 avl_add(&spa_namespace_avl
, spa
);
475 * Set the alternate root, if there is one.
478 spa
->spa_root
= spa_strdup(altroot
);
483 * Every pool starts with the default cachefile
485 list_create(&spa
->spa_config_list
, sizeof (spa_config_dirent_t
),
486 offsetof(spa_config_dirent_t
, scd_link
));
488 dp
= kmem_zalloc(sizeof (spa_config_dirent_t
), KM_SLEEP
);
489 dp
->scd_path
= altroot
? NULL
: spa_strdup(spa_config_path
);
490 list_insert_head(&spa
->spa_config_list
, dp
);
492 VERIFY(nvlist_alloc(&spa
->spa_load_info
, NV_UNIQUE_NAME
,
496 VERIFY(nvlist_dup(config
, &spa
->spa_config
, 0) == 0);
502 * Removes a spa_t from the namespace, freeing up any memory used. Requires
503 * spa_namespace_lock. This is called only after the spa_t has been closed and
507 spa_remove(spa_t
*spa
)
509 spa_config_dirent_t
*dp
;
512 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
513 ASSERT(spa
->spa_state
== POOL_STATE_UNINITIALIZED
);
515 nvlist_free(spa
->spa_config_splitting
);
517 avl_remove(&spa_namespace_avl
, spa
);
518 cv_broadcast(&spa_namespace_cv
);
521 spa_strfree(spa
->spa_root
);
525 while ((dp
= list_head(&spa
->spa_config_list
)) != NULL
) {
526 list_remove(&spa
->spa_config_list
, dp
);
527 if (dp
->scd_path
!= NULL
)
528 spa_strfree(dp
->scd_path
);
529 kmem_free(dp
, sizeof (spa_config_dirent_t
));
532 list_destroy(&spa
->spa_config_list
);
534 nvlist_free(spa
->spa_load_info
);
535 spa_config_set(spa
, NULL
);
537 refcount_destroy(&spa
->spa_refcount
);
539 spa_config_lock_destroy(spa
);
541 for (t
= 0; t
< TXG_SIZE
; t
++)
542 bplist_destroy(&spa
->spa_free_bplist
[t
]);
544 cv_destroy(&spa
->spa_async_cv
);
545 cv_destroy(&spa
->spa_proc_cv
);
546 cv_destroy(&spa
->spa_scrub_io_cv
);
547 cv_destroy(&spa
->spa_suspend_cv
);
549 mutex_destroy(&spa
->spa_async_lock
);
550 mutex_destroy(&spa
->spa_errlist_lock
);
551 mutex_destroy(&spa
->spa_errlog_lock
);
552 mutex_destroy(&spa
->spa_history_lock
);
553 mutex_destroy(&spa
->spa_proc_lock
);
554 mutex_destroy(&spa
->spa_props_lock
);
555 mutex_destroy(&spa
->spa_scrub_lock
);
556 mutex_destroy(&spa
->spa_suspend_lock
);
557 mutex_destroy(&spa
->spa_vdev_top_lock
);
559 kmem_free(spa
, sizeof (spa_t
));
563 * Given a pool, return the next pool in the namespace, or NULL if there is
564 * none. If 'prev' is NULL, return the first pool.
567 spa_next(spa_t
*prev
)
569 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
572 return (AVL_NEXT(&spa_namespace_avl
, prev
));
574 return (avl_first(&spa_namespace_avl
));
578 * ==========================================================================
579 * SPA refcount functions
580 * ==========================================================================
584 * Add a reference to the given spa_t. Must have at least one reference, or
585 * have the namespace lock held.
588 spa_open_ref(spa_t
*spa
, void *tag
)
590 ASSERT(refcount_count(&spa
->spa_refcount
) >= spa
->spa_minref
||
591 MUTEX_HELD(&spa_namespace_lock
));
592 (void) refcount_add(&spa
->spa_refcount
, tag
);
596 * Remove a reference to the given spa_t. Must have at least one reference, or
597 * have the namespace lock held.
600 spa_close(spa_t
*spa
, void *tag
)
602 ASSERT(refcount_count(&spa
->spa_refcount
) > spa
->spa_minref
||
603 MUTEX_HELD(&spa_namespace_lock
));
604 (void) refcount_remove(&spa
->spa_refcount
, tag
);
608 * Check to see if the spa refcount is zero. Must be called with
609 * spa_namespace_lock held. We really compare against spa_minref, which is the
610 * number of references acquired when opening a pool
613 spa_refcount_zero(spa_t
*spa
)
615 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
617 return (refcount_count(&spa
->spa_refcount
) == spa
->spa_minref
);
621 * ==========================================================================
622 * SPA spare and l2cache tracking
623 * ==========================================================================
627 * Hot spares and cache devices are tracked using the same code below,
628 * for 'auxiliary' devices.
631 typedef struct spa_aux
{
639 spa_aux_compare(const void *a
, const void *b
)
641 const spa_aux_t
*sa
= a
;
642 const spa_aux_t
*sb
= b
;
644 if (sa
->aux_guid
< sb
->aux_guid
)
646 else if (sa
->aux_guid
> sb
->aux_guid
)
653 spa_aux_add(vdev_t
*vd
, avl_tree_t
*avl
)
659 search
.aux_guid
= vd
->vdev_guid
;
660 if ((aux
= avl_find(avl
, &search
, &where
)) != NULL
) {
663 aux
= kmem_zalloc(sizeof (spa_aux_t
), KM_SLEEP
);
664 aux
->aux_guid
= vd
->vdev_guid
;
666 avl_insert(avl
, aux
, where
);
671 spa_aux_remove(vdev_t
*vd
, avl_tree_t
*avl
)
677 search
.aux_guid
= vd
->vdev_guid
;
678 aux
= avl_find(avl
, &search
, &where
);
682 if (--aux
->aux_count
== 0) {
683 avl_remove(avl
, aux
);
684 kmem_free(aux
, sizeof (spa_aux_t
));
685 } else if (aux
->aux_pool
== spa_guid(vd
->vdev_spa
)) {
686 aux
->aux_pool
= 0ULL;
691 spa_aux_exists(uint64_t guid
, uint64_t *pool
, int *refcnt
, avl_tree_t
*avl
)
693 spa_aux_t search
, *found
;
695 search
.aux_guid
= guid
;
696 found
= avl_find(avl
, &search
, NULL
);
700 *pool
= found
->aux_pool
;
707 *refcnt
= found
->aux_count
;
712 return (found
!= NULL
);
716 spa_aux_activate(vdev_t
*vd
, avl_tree_t
*avl
)
718 spa_aux_t search
, *found
;
721 search
.aux_guid
= vd
->vdev_guid
;
722 found
= avl_find(avl
, &search
, &where
);
723 ASSERT(found
!= NULL
);
724 ASSERT(found
->aux_pool
== 0ULL);
726 found
->aux_pool
= spa_guid(vd
->vdev_spa
);
730 * Spares are tracked globally due to the following constraints:
732 * - A spare may be part of multiple pools.
733 * - A spare may be added to a pool even if it's actively in use within
735 * - A spare in use in any pool can only be the source of a replacement if
736 * the target is a spare in the same pool.
738 * We keep track of all spares on the system through the use of a reference
739 * counted AVL tree. When a vdev is added as a spare, or used as a replacement
740 * spare, then we bump the reference count in the AVL tree. In addition, we set
741 * the 'vdev_isspare' member to indicate that the device is a spare (active or
742 * inactive). When a spare is made active (used to replace a device in the
743 * pool), we also keep track of which pool its been made a part of.
745 * The 'spa_spare_lock' protects the AVL tree. These functions are normally
746 * called under the spa_namespace lock as part of vdev reconfiguration. The
747 * separate spare lock exists for the status query path, which does not need to
748 * be completely consistent with respect to other vdev configuration changes.
752 spa_spare_compare(const void *a
, const void *b
)
754 return (spa_aux_compare(a
, b
));
758 spa_spare_add(vdev_t
*vd
)
760 mutex_enter(&spa_spare_lock
);
761 ASSERT(!vd
->vdev_isspare
);
762 spa_aux_add(vd
, &spa_spare_avl
);
763 vd
->vdev_isspare
= B_TRUE
;
764 mutex_exit(&spa_spare_lock
);
768 spa_spare_remove(vdev_t
*vd
)
770 mutex_enter(&spa_spare_lock
);
771 ASSERT(vd
->vdev_isspare
);
772 spa_aux_remove(vd
, &spa_spare_avl
);
773 vd
->vdev_isspare
= B_FALSE
;
774 mutex_exit(&spa_spare_lock
);
778 spa_spare_exists(uint64_t guid
, uint64_t *pool
, int *refcnt
)
782 mutex_enter(&spa_spare_lock
);
783 found
= spa_aux_exists(guid
, pool
, refcnt
, &spa_spare_avl
);
784 mutex_exit(&spa_spare_lock
);
790 spa_spare_activate(vdev_t
*vd
)
792 mutex_enter(&spa_spare_lock
);
793 ASSERT(vd
->vdev_isspare
);
794 spa_aux_activate(vd
, &spa_spare_avl
);
795 mutex_exit(&spa_spare_lock
);
799 * Level 2 ARC devices are tracked globally for the same reasons as spares.
800 * Cache devices currently only support one pool per cache device, and so
801 * for these devices the aux reference count is currently unused beyond 1.
805 spa_l2cache_compare(const void *a
, const void *b
)
807 return (spa_aux_compare(a
, b
));
811 spa_l2cache_add(vdev_t
*vd
)
813 mutex_enter(&spa_l2cache_lock
);
814 ASSERT(!vd
->vdev_isl2cache
);
815 spa_aux_add(vd
, &spa_l2cache_avl
);
816 vd
->vdev_isl2cache
= B_TRUE
;
817 mutex_exit(&spa_l2cache_lock
);
821 spa_l2cache_remove(vdev_t
*vd
)
823 mutex_enter(&spa_l2cache_lock
);
824 ASSERT(vd
->vdev_isl2cache
);
825 spa_aux_remove(vd
, &spa_l2cache_avl
);
826 vd
->vdev_isl2cache
= B_FALSE
;
827 mutex_exit(&spa_l2cache_lock
);
831 spa_l2cache_exists(uint64_t guid
, uint64_t *pool
)
835 mutex_enter(&spa_l2cache_lock
);
836 found
= spa_aux_exists(guid
, pool
, NULL
, &spa_l2cache_avl
);
837 mutex_exit(&spa_l2cache_lock
);
843 spa_l2cache_activate(vdev_t
*vd
)
845 mutex_enter(&spa_l2cache_lock
);
846 ASSERT(vd
->vdev_isl2cache
);
847 spa_aux_activate(vd
, &spa_l2cache_avl
);
848 mutex_exit(&spa_l2cache_lock
);
852 * ==========================================================================
854 * ==========================================================================
858 * Lock the given spa_t for the purpose of adding or removing a vdev.
859 * Grabs the global spa_namespace_lock plus the spa config lock for writing.
860 * It returns the next transaction group for the spa_t.
863 spa_vdev_enter(spa_t
*spa
)
865 mutex_enter(&spa
->spa_vdev_top_lock
);
866 mutex_enter(&spa_namespace_lock
);
867 return (spa_vdev_config_enter(spa
));
871 * Internal implementation for spa_vdev_enter(). Used when a vdev
872 * operation requires multiple syncs (i.e. removing a device) while
873 * keeping the spa_namespace_lock held.
876 spa_vdev_config_enter(spa_t
*spa
)
878 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
880 spa_config_enter(spa
, SCL_ALL
, spa
, RW_WRITER
);
882 return (spa_last_synced_txg(spa
) + 1);
886 * Used in combination with spa_vdev_config_enter() to allow the syncing
887 * of multiple transactions without releasing the spa_namespace_lock.
890 spa_vdev_config_exit(spa_t
*spa
, vdev_t
*vd
, uint64_t txg
, int error
, char *tag
)
892 int config_changed
= B_FALSE
;
894 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
895 ASSERT(txg
> spa_last_synced_txg(spa
));
897 spa
->spa_pending_vdev
= NULL
;
902 vdev_dtl_reassess(spa
->spa_root_vdev
, 0, 0, B_FALSE
);
904 if (error
== 0 && !list_is_empty(&spa
->spa_config_dirty_list
)) {
905 config_changed
= B_TRUE
;
906 spa
->spa_config_generation
++;
910 * Verify the metaslab classes.
912 ASSERT(metaslab_class_validate(spa_normal_class(spa
)) == 0);
913 ASSERT(metaslab_class_validate(spa_log_class(spa
)) == 0);
915 spa_config_exit(spa
, SCL_ALL
, spa
);
918 * Panic the system if the specified tag requires it. This
919 * is useful for ensuring that configurations are updated
922 if (zio_injection_enabled
)
923 zio_handle_panic_injection(spa
, tag
, 0);
926 * Note: this txg_wait_synced() is important because it ensures
927 * that there won't be more than one config change per txg.
928 * This allows us to use the txg as the generation number.
931 txg_wait_synced(spa
->spa_dsl_pool
, txg
);
934 ASSERT(!vd
->vdev_detached
|| vd
->vdev_dtl_smo
.smo_object
== 0);
935 spa_config_enter(spa
, SCL_ALL
, spa
, RW_WRITER
);
937 spa_config_exit(spa
, SCL_ALL
, spa
);
941 * If the config changed, update the config cache.
944 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
948 * Unlock the spa_t after adding or removing a vdev. Besides undoing the
949 * locking of spa_vdev_enter(), we also want make sure the transactions have
950 * synced to disk, and then update the global configuration cache with the new
954 spa_vdev_exit(spa_t
*spa
, vdev_t
*vd
, uint64_t txg
, int error
)
956 spa_vdev_config_exit(spa
, vd
, txg
, error
, FTAG
);
957 mutex_exit(&spa_namespace_lock
);
958 mutex_exit(&spa
->spa_vdev_top_lock
);
964 * Lock the given spa_t for the purpose of changing vdev state.
967 spa_vdev_state_enter(spa_t
*spa
, int oplocks
)
969 int locks
= SCL_STATE_ALL
| oplocks
;
972 * Root pools may need to read of the underlying devfs filesystem
973 * when opening up a vdev. Unfortunately if we're holding the
974 * SCL_ZIO lock it will result in a deadlock when we try to issue
975 * the read from the root filesystem. Instead we "prefetch"
976 * the associated vnodes that we need prior to opening the
977 * underlying devices and cache them so that we can prevent
978 * any I/O when we are doing the actual open.
980 if (spa_is_root(spa
)) {
981 int low
= locks
& ~(SCL_ZIO
- 1);
982 int high
= locks
& ~low
;
984 spa_config_enter(spa
, high
, spa
, RW_WRITER
);
985 vdev_hold(spa
->spa_root_vdev
);
986 spa_config_enter(spa
, low
, spa
, RW_WRITER
);
988 spa_config_enter(spa
, locks
, spa
, RW_WRITER
);
990 spa
->spa_vdev_locks
= locks
;
994 spa_vdev_state_exit(spa_t
*spa
, vdev_t
*vd
, int error
)
996 boolean_t config_changed
= B_FALSE
;
998 if (vd
!= NULL
|| error
== 0)
999 vdev_dtl_reassess(vd
? vd
->vdev_top
: spa
->spa_root_vdev
,
1003 vdev_state_dirty(vd
->vdev_top
);
1004 config_changed
= B_TRUE
;
1005 spa
->spa_config_generation
++;
1008 if (spa_is_root(spa
))
1009 vdev_rele(spa
->spa_root_vdev
);
1011 ASSERT3U(spa
->spa_vdev_locks
, >=, SCL_STATE_ALL
);
1012 spa_config_exit(spa
, spa
->spa_vdev_locks
, spa
);
1015 * If anything changed, wait for it to sync. This ensures that,
1016 * from the system administrator's perspective, zpool(1M) commands
1017 * are synchronous. This is important for things like zpool offline:
1018 * when the command completes, you expect no further I/O from ZFS.
1021 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1024 * If the config changed, update the config cache.
1026 if (config_changed
) {
1027 mutex_enter(&spa_namespace_lock
);
1028 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
1029 mutex_exit(&spa_namespace_lock
);
1036 * ==========================================================================
1037 * Miscellaneous functions
1038 * ==========================================================================
1045 spa_rename(const char *name
, const char *newname
)
1051 * Lookup the spa_t and grab the config lock for writing. We need to
1052 * actually open the pool so that we can sync out the necessary labels.
1053 * It's OK to call spa_open() with the namespace lock held because we
1054 * allow recursive calls for other reasons.
1056 mutex_enter(&spa_namespace_lock
);
1057 if ((err
= spa_open(name
, &spa
, FTAG
)) != 0) {
1058 mutex_exit(&spa_namespace_lock
);
1062 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1064 avl_remove(&spa_namespace_avl
, spa
);
1065 (void) strlcpy(spa
->spa_name
, newname
, sizeof (spa
->spa_name
));
1066 avl_add(&spa_namespace_avl
, spa
);
1069 * Sync all labels to disk with the new names by marking the root vdev
1070 * dirty and waiting for it to sync. It will pick up the new pool name
1073 vdev_config_dirty(spa
->spa_root_vdev
);
1075 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1077 txg_wait_synced(spa
->spa_dsl_pool
, 0);
1080 * Sync the updated config cache.
1082 spa_config_sync(spa
, B_FALSE
, B_TRUE
);
1084 spa_close(spa
, FTAG
);
1086 mutex_exit(&spa_namespace_lock
);
1092 * Return the spa_t associated with given pool_guid, if it exists. If
1093 * device_guid is non-zero, determine whether the pool exists *and* contains
1094 * a device with the specified device_guid.
1097 spa_by_guid(uint64_t pool_guid
, uint64_t device_guid
)
1100 avl_tree_t
*t
= &spa_namespace_avl
;
1102 ASSERT(MUTEX_HELD(&spa_namespace_lock
));
1104 for (spa
= avl_first(t
); spa
!= NULL
; spa
= AVL_NEXT(t
, spa
)) {
1105 if (spa
->spa_state
== POOL_STATE_UNINITIALIZED
)
1107 if (spa
->spa_root_vdev
== NULL
)
1109 if (spa_guid(spa
) == pool_guid
) {
1110 if (device_guid
== 0)
1113 if (vdev_lookup_by_guid(spa
->spa_root_vdev
,
1114 device_guid
) != NULL
)
1118 * Check any devices we may be in the process of adding.
1120 if (spa
->spa_pending_vdev
) {
1121 if (vdev_lookup_by_guid(spa
->spa_pending_vdev
,
1122 device_guid
) != NULL
)
1132 * Determine whether a pool with the given pool_guid exists.
1135 spa_guid_exists(uint64_t pool_guid
, uint64_t device_guid
)
1137 return (spa_by_guid(pool_guid
, device_guid
) != NULL
);
1141 spa_strdup(const char *s
)
1147 new = kmem_alloc(len
+ 1, KM_SLEEP
);
1155 spa_strfree(char *s
)
1157 kmem_free(s
, strlen(s
) + 1);
1161 spa_get_random(uint64_t range
)
1167 (void) random_get_pseudo_bytes((void *)&r
, sizeof (uint64_t));
1173 spa_generate_guid(spa_t
*spa
)
1175 uint64_t guid
= spa_get_random(-1ULL);
1178 while (guid
== 0 || spa_guid_exists(spa_guid(spa
), guid
))
1179 guid
= spa_get_random(-1ULL);
1181 while (guid
== 0 || spa_guid_exists(guid
, 0))
1182 guid
= spa_get_random(-1ULL);
1189 sprintf_blkptr(char *buf
, const blkptr_t
*bp
)
1192 char *checksum
= NULL
;
1193 char *compress
= NULL
;
1196 type
= dmu_ot
[BP_GET_TYPE(bp
)].ot_name
;
1197 checksum
= zio_checksum_table
[BP_GET_CHECKSUM(bp
)].ci_name
;
1198 compress
= zio_compress_table
[BP_GET_COMPRESS(bp
)].ci_name
;
1201 SPRINTF_BLKPTR(snprintf
, ' ', buf
, bp
, type
, checksum
, compress
);
1205 spa_freeze(spa_t
*spa
)
1207 uint64_t freeze_txg
= 0;
1209 spa_config_enter(spa
, SCL_ALL
, FTAG
, RW_WRITER
);
1210 if (spa
->spa_freeze_txg
== UINT64_MAX
) {
1211 freeze_txg
= spa_last_synced_txg(spa
) + TXG_SIZE
;
1212 spa
->spa_freeze_txg
= freeze_txg
;
1214 spa_config_exit(spa
, SCL_ALL
, FTAG
);
1215 if (freeze_txg
!= 0)
1216 txg_wait_synced(spa_get_dsl(spa
), freeze_txg
);
1220 zfs_panic_recover(const char *fmt
, ...)
1225 vcmn_err(zfs_recover
? CE_WARN
: CE_PANIC
, fmt
, adx
);
1230 * This is a stripped-down version of strtoull, suitable only for converting
1231 * lowercase hexidecimal numbers that don't overflow.
1234 strtonum(const char *str
, char **nptr
)
1240 while ((c
= *str
) != '\0') {
1241 if (c
>= '0' && c
<= '9')
1243 else if (c
>= 'a' && c
<= 'f')
1244 digit
= 10 + c
- 'a';
1255 *nptr
= (char *)str
;
1261 * ==========================================================================
1262 * Accessor functions
1263 * ==========================================================================
1267 spa_shutting_down(spa_t
*spa
)
1269 return (spa
->spa_async_suspended
);
1273 spa_get_dsl(spa_t
*spa
)
1275 return (spa
->spa_dsl_pool
);
1279 spa_get_rootblkptr(spa_t
*spa
)
1281 return (&spa
->spa_ubsync
.ub_rootbp
);
1285 spa_set_rootblkptr(spa_t
*spa
, const blkptr_t
*bp
)
1287 spa
->spa_uberblock
.ub_rootbp
= *bp
;
1291 spa_altroot(spa_t
*spa
, char *buf
, size_t buflen
)
1293 if (spa
->spa_root
== NULL
)
1296 (void) strncpy(buf
, spa
->spa_root
, buflen
);
1300 spa_sync_pass(spa_t
*spa
)
1302 return (spa
->spa_sync_pass
);
1306 spa_name(spa_t
*spa
)
1308 return (spa
->spa_name
);
1312 spa_guid(spa_t
*spa
)
1315 * If we fail to parse the config during spa_load(), we can go through
1316 * the error path (which posts an ereport) and end up here with no root
1317 * vdev. We stash the original pool guid in 'spa_load_guid' to handle
1320 if (spa
->spa_root_vdev
!= NULL
)
1321 return (spa
->spa_root_vdev
->vdev_guid
);
1323 return (spa
->spa_load_guid
);
1327 spa_last_synced_txg(spa_t
*spa
)
1329 return (spa
->spa_ubsync
.ub_txg
);
1333 spa_first_txg(spa_t
*spa
)
1335 return (spa
->spa_first_txg
);
1339 spa_syncing_txg(spa_t
*spa
)
1341 return (spa
->spa_syncing_txg
);
1345 spa_state(spa_t
*spa
)
1347 return (spa
->spa_state
);
1351 spa_load_state(spa_t
*spa
)
1353 return (spa
->spa_load_state
);
1357 spa_freeze_txg(spa_t
*spa
)
1359 return (spa
->spa_freeze_txg
);
1364 spa_get_asize(spa_t
*spa
, uint64_t lsize
)
1367 * The worst case is single-sector max-parity RAID-Z blocks, in which
1368 * case the space requirement is exactly (VDEV_RAIDZ_MAXPARITY + 1)
1369 * times the size; so just assume that. Add to this the fact that
1370 * we can have up to 3 DVAs per bp, and one more factor of 2 because
1371 * the block may be dittoed with up to 3 DVAs by ddt_sync().
1373 return (lsize
* (VDEV_RAIDZ_MAXPARITY
+ 1) * SPA_DVAS_PER_BP
* 2);
1377 spa_get_dspace(spa_t
*spa
)
1379 return (spa
->spa_dspace
);
1383 spa_update_dspace(spa_t
*spa
)
1385 spa
->spa_dspace
= metaslab_class_get_dspace(spa_normal_class(spa
)) +
1386 ddt_get_dedup_dspace(spa
);
1390 * Return the failure mode that has been set to this pool. The default
1391 * behavior will be to block all I/Os when a complete failure occurs.
1394 spa_get_failmode(spa_t
*spa
)
1396 return (spa
->spa_failmode
);
1400 spa_suspended(spa_t
*spa
)
1402 return (spa
->spa_suspended
);
1406 spa_version(spa_t
*spa
)
1408 return (spa
->spa_ubsync
.ub_version
);
1412 spa_deflate(spa_t
*spa
)
1414 return (spa
->spa_deflate
);
1418 spa_normal_class(spa_t
*spa
)
1420 return (spa
->spa_normal_class
);
1424 spa_log_class(spa_t
*spa
)
1426 return (spa
->spa_log_class
);
1430 spa_max_replication(spa_t
*spa
)
1433 * As of SPA_VERSION == SPA_VERSION_DITTO_BLOCKS, we are able to
1434 * handle BPs with more than one DVA allocated. Set our max
1435 * replication level accordingly.
1437 if (spa_version(spa
) < SPA_VERSION_DITTO_BLOCKS
)
1439 return (MIN(SPA_DVAS_PER_BP
, spa_max_replication_override
));
1443 spa_prev_software_version(spa_t
*spa
)
1445 return (spa
->spa_prev_software_version
);
1449 dva_get_dsize_sync(spa_t
*spa
, const dva_t
*dva
)
1451 uint64_t asize
= DVA_GET_ASIZE(dva
);
1452 uint64_t dsize
= asize
;
1454 ASSERT(spa_config_held(spa
, SCL_ALL
, RW_READER
) != 0);
1456 if (asize
!= 0 && spa
->spa_deflate
) {
1457 vdev_t
*vd
= vdev_lookup_top(spa
, DVA_GET_VDEV(dva
));
1458 dsize
= (asize
>> SPA_MINBLOCKSHIFT
) * vd
->vdev_deflate_ratio
;
1465 bp_get_dsize_sync(spa_t
*spa
, const blkptr_t
*bp
)
1470 for (d
= 0; d
< SPA_DVAS_PER_BP
; d
++)
1471 dsize
+= dva_get_dsize_sync(spa
, &bp
->blk_dva
[d
]);
1477 bp_get_dsize(spa_t
*spa
, const blkptr_t
*bp
)
1482 spa_config_enter(spa
, SCL_VDEV
, FTAG
, RW_READER
);
1484 for (d
= 0; d
< SPA_DVAS_PER_BP
; d
++)
1485 dsize
+= dva_get_dsize_sync(spa
, &bp
->blk_dva
[d
]);
1487 spa_config_exit(spa
, SCL_VDEV
, FTAG
);
1493 * ==========================================================================
1494 * Initialization and Termination
1495 * ==========================================================================
1499 spa_name_compare(const void *a1
, const void *a2
)
1501 const spa_t
*s1
= a1
;
1502 const spa_t
*s2
= a2
;
1505 s
= strcmp(s1
->spa_name
, s2
->spa_name
);
1522 mutex_init(&spa_namespace_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
1523 mutex_init(&spa_spare_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
1524 mutex_init(&spa_l2cache_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
1525 cv_init(&spa_namespace_cv
, NULL
, CV_DEFAULT
, NULL
);
1527 avl_create(&spa_namespace_avl
, spa_name_compare
, sizeof (spa_t
),
1528 offsetof(spa_t
, spa_avl
));
1530 avl_create(&spa_spare_avl
, spa_spare_compare
, sizeof (spa_aux_t
),
1531 offsetof(spa_aux_t
, aux_avl
));
1533 avl_create(&spa_l2cache_avl
, spa_l2cache_compare
, sizeof (spa_aux_t
),
1534 offsetof(spa_aux_t
, aux_avl
));
1536 spa_mode_global
= mode
;
1544 vdev_cache_stat_init();
1558 vdev_cache_stat_fini();
1566 avl_destroy(&spa_namespace_avl
);
1567 avl_destroy(&spa_spare_avl
);
1568 avl_destroy(&spa_l2cache_avl
);
1570 cv_destroy(&spa_namespace_cv
);
1571 mutex_destroy(&spa_namespace_lock
);
1572 mutex_destroy(&spa_spare_lock
);
1573 mutex_destroy(&spa_l2cache_lock
);
1577 * Return whether this pool has slogs. No locking needed.
1578 * It's not a problem if the wrong answer is returned as it's only for
1579 * performance and not correctness
1582 spa_has_slogs(spa_t
*spa
)
1584 return (spa
->spa_log_class
->mc_rotor
!= NULL
);
1588 spa_get_log_state(spa_t
*spa
)
1590 return (spa
->spa_log_state
);
1594 spa_set_log_state(spa_t
*spa
, spa_log_state_t state
)
1596 spa
->spa_log_state
= state
;
1600 spa_is_root(spa_t
*spa
)
1602 return (spa
->spa_is_root
);
1606 spa_writeable(spa_t
*spa
)
1608 return (!!(spa
->spa_mode
& FWRITE
));
1612 spa_mode(spa_t
*spa
)
1614 return (spa
->spa_mode
);
1618 spa_bootfs(spa_t
*spa
)
1620 return (spa
->spa_bootfs
);
1624 spa_delegation(spa_t
*spa
)
1626 return (spa
->spa_delegation
);
1630 spa_meta_objset(spa_t
*spa
)
1632 return (spa
->spa_meta_objset
);
1636 spa_dedup_checksum(spa_t
*spa
)
1638 return (spa
->spa_dedup_checksum
);
1642 * Reset pool scan stat per scan pass (or reboot).
1645 spa_scan_stat_init(spa_t
*spa
)
1647 /* data not stored on disk */
1648 spa
->spa_scan_pass_start
= gethrestime_sec();
1649 spa
->spa_scan_pass_exam
= 0;
1650 vdev_scan_stat_init(spa
->spa_root_vdev
);
1654 * Get scan stats for zpool status reports
1657 spa_scan_get_stats(spa_t
*spa
, pool_scan_stat_t
*ps
)
1659 dsl_scan_t
*scn
= spa
->spa_dsl_pool
? spa
->spa_dsl_pool
->dp_scan
: NULL
;
1661 if (scn
== NULL
|| scn
->scn_phys
.scn_func
== POOL_SCAN_NONE
)
1663 bzero(ps
, sizeof (pool_scan_stat_t
));
1665 /* data stored on disk */
1666 ps
->pss_func
= scn
->scn_phys
.scn_func
;
1667 ps
->pss_start_time
= scn
->scn_phys
.scn_start_time
;
1668 ps
->pss_end_time
= scn
->scn_phys
.scn_end_time
;
1669 ps
->pss_to_examine
= scn
->scn_phys
.scn_to_examine
;
1670 ps
->pss_examined
= scn
->scn_phys
.scn_examined
;
1671 ps
->pss_to_process
= scn
->scn_phys
.scn_to_process
;
1672 ps
->pss_processed
= scn
->scn_phys
.scn_processed
;
1673 ps
->pss_errors
= scn
->scn_phys
.scn_errors
;
1674 ps
->pss_state
= scn
->scn_phys
.scn_state
;
1676 /* data not stored on disk */
1677 ps
->pss_pass_start
= spa
->spa_scan_pass_start
;
1678 ps
->pss_pass_exam
= spa
->spa_scan_pass_exam
;
1683 #if defined(_KERNEL) && defined(HAVE_SPL)
1684 /* Namespace manipulation */
1685 EXPORT_SYMBOL(spa_lookup
);
1686 EXPORT_SYMBOL(spa_add
);
1687 EXPORT_SYMBOL(spa_remove
);
1688 EXPORT_SYMBOL(spa_next
);
1690 /* Refcount functions */
1691 EXPORT_SYMBOL(spa_open_ref
);
1692 EXPORT_SYMBOL(spa_close
);
1693 EXPORT_SYMBOL(spa_refcount_zero
);
1695 /* Pool configuration lock */
1696 EXPORT_SYMBOL(spa_config_tryenter
);
1697 EXPORT_SYMBOL(spa_config_enter
);
1698 EXPORT_SYMBOL(spa_config_exit
);
1699 EXPORT_SYMBOL(spa_config_held
);
1701 /* Pool vdev add/remove lock */
1702 EXPORT_SYMBOL(spa_vdev_enter
);
1703 EXPORT_SYMBOL(spa_vdev_exit
);
1705 /* Pool vdev state change lock */
1706 EXPORT_SYMBOL(spa_vdev_state_enter
);
1707 EXPORT_SYMBOL(spa_vdev_state_exit
);
1709 /* Accessor functions */
1710 EXPORT_SYMBOL(spa_shutting_down
);
1711 EXPORT_SYMBOL(spa_get_dsl
);
1712 EXPORT_SYMBOL(spa_get_rootblkptr
);
1713 EXPORT_SYMBOL(spa_set_rootblkptr
);
1714 EXPORT_SYMBOL(spa_altroot
);
1715 EXPORT_SYMBOL(spa_sync_pass
);
1716 EXPORT_SYMBOL(spa_name
);
1717 EXPORT_SYMBOL(spa_guid
);
1718 EXPORT_SYMBOL(spa_last_synced_txg
);
1719 EXPORT_SYMBOL(spa_first_txg
);
1720 EXPORT_SYMBOL(spa_syncing_txg
);
1721 EXPORT_SYMBOL(spa_version
);
1722 EXPORT_SYMBOL(spa_state
);
1723 EXPORT_SYMBOL(spa_load_state
);
1724 EXPORT_SYMBOL(spa_freeze_txg
);
1725 EXPORT_SYMBOL(spa_get_asize
);
1726 EXPORT_SYMBOL(spa_get_dspace
);
1727 EXPORT_SYMBOL(spa_update_dspace
);
1728 EXPORT_SYMBOL(spa_deflate
);
1729 EXPORT_SYMBOL(spa_normal_class
);
1730 EXPORT_SYMBOL(spa_log_class
);
1731 EXPORT_SYMBOL(spa_max_replication
);
1732 EXPORT_SYMBOL(spa_prev_software_version
);
1733 EXPORT_SYMBOL(spa_get_failmode
);
1734 EXPORT_SYMBOL(spa_suspended
);
1735 EXPORT_SYMBOL(spa_bootfs
);
1736 EXPORT_SYMBOL(spa_delegation
);
1737 EXPORT_SYMBOL(spa_meta_objset
);
1739 /* Miscellaneous support routines */
1740 EXPORT_SYMBOL(spa_rename
);
1741 EXPORT_SYMBOL(spa_guid_exists
);
1742 EXPORT_SYMBOL(spa_strdup
);
1743 EXPORT_SYMBOL(spa_strfree
);
1744 EXPORT_SYMBOL(spa_get_random
);
1745 EXPORT_SYMBOL(spa_generate_guid
);
1746 EXPORT_SYMBOL(sprintf_blkptr
);
1747 EXPORT_SYMBOL(spa_freeze
);
1748 EXPORT_SYMBOL(spa_upgrade
);
1749 EXPORT_SYMBOL(spa_evict_all
);
1750 EXPORT_SYMBOL(spa_lookup_by_guid
);
1751 EXPORT_SYMBOL(spa_has_spare
);
1752 EXPORT_SYMBOL(dva_get_dsize_sync
);
1753 EXPORT_SYMBOL(bp_get_dsize_sync
);
1754 EXPORT_SYMBOL(bp_get_dsize
);
1755 EXPORT_SYMBOL(spa_has_slogs
);
1756 EXPORT_SYMBOL(spa_is_root
);
1757 EXPORT_SYMBOL(spa_writeable
);
1758 EXPORT_SYMBOL(spa_mode
);
1760 EXPORT_SYMBOL(spa_namespace_lock
);