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34dc7c2f BB |
1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
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. | |
7 | * | |
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. | |
12 | * | |
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] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
b02fe35d | 23 | * Copyright (c) 2011, 2014 by Delphix. All rights reserved. |
3541dc6d | 24 | * Copyright 2011 Nexenta Systems, Inc. All rights reserved. |
0c66c32d | 25 | * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. |
34dc7c2f BB |
26 | */ |
27 | ||
34dc7c2f BB |
28 | #include <sys/zfs_context.h> |
29 | #include <sys/spa_impl.h> | |
30 | #include <sys/zio.h> | |
31 | #include <sys/zio_checksum.h> | |
32 | #include <sys/zio_compress.h> | |
33 | #include <sys/dmu.h> | |
34 | #include <sys/dmu_tx.h> | |
35 | #include <sys/zap.h> | |
36 | #include <sys/zil.h> | |
37 | #include <sys/vdev_impl.h> | |
bc25c932 | 38 | #include <sys/vdev_file.h> |
34dc7c2f BB |
39 | #include <sys/metaslab.h> |
40 | #include <sys/uberblock_impl.h> | |
41 | #include <sys/txg.h> | |
42 | #include <sys/avl.h> | |
43 | #include <sys/unique.h> | |
44 | #include <sys/dsl_pool.h> | |
45 | #include <sys/dsl_dir.h> | |
46 | #include <sys/dsl_prop.h> | |
26685276 | 47 | #include <sys/fm/util.h> |
428870ff | 48 | #include <sys/dsl_scan.h> |
34dc7c2f BB |
49 | #include <sys/fs/zfs.h> |
50 | #include <sys/metaslab_impl.h> | |
b128c09f | 51 | #include <sys/arc.h> |
428870ff | 52 | #include <sys/ddt.h> |
1421c891 | 53 | #include <sys/kstat.h> |
34dc7c2f | 54 | #include "zfs_prop.h" |
9ae529ec | 55 | #include "zfeature_common.h" |
34dc7c2f BB |
56 | |
57 | /* | |
58 | * SPA locking | |
59 | * | |
60 | * There are four basic locks for managing spa_t structures: | |
61 | * | |
62 | * spa_namespace_lock (global mutex) | |
63 | * | |
64 | * This lock must be acquired to do any of the following: | |
65 | * | |
66 | * - Lookup a spa_t by name | |
67 | * - Add or remove a spa_t from the namespace | |
68 | * - Increase spa_refcount from non-zero | |
69 | * - Check if spa_refcount is zero | |
70 | * - Rename a spa_t | |
71 | * - add/remove/attach/detach devices | |
72 | * - Held for the duration of create/destroy/import/export | |
73 | * | |
74 | * It does not need to handle recursion. A create or destroy may | |
75 | * reference objects (files or zvols) in other pools, but by | |
76 | * definition they must have an existing reference, and will never need | |
77 | * to lookup a spa_t by name. | |
78 | * | |
79 | * spa_refcount (per-spa refcount_t protected by mutex) | |
80 | * | |
81 | * This reference count keep track of any active users of the spa_t. The | |
82 | * spa_t cannot be destroyed or freed while this is non-zero. Internally, | |
83 | * the refcount is never really 'zero' - opening a pool implicitly keeps | |
b128c09f | 84 | * some references in the DMU. Internally we check against spa_minref, but |
34dc7c2f BB |
85 | * present the image of a zero/non-zero value to consumers. |
86 | * | |
b128c09f | 87 | * spa_config_lock[] (per-spa array of rwlocks) |
34dc7c2f BB |
88 | * |
89 | * This protects the spa_t from config changes, and must be held in | |
90 | * the following circumstances: | |
91 | * | |
92 | * - RW_READER to perform I/O to the spa | |
93 | * - RW_WRITER to change the vdev config | |
94 | * | |
34dc7c2f BB |
95 | * The locking order is fairly straightforward: |
96 | * | |
97 | * spa_namespace_lock -> spa_refcount | |
98 | * | |
99 | * The namespace lock must be acquired to increase the refcount from 0 | |
100 | * or to check if it is zero. | |
101 | * | |
b128c09f | 102 | * spa_refcount -> spa_config_lock[] |
34dc7c2f BB |
103 | * |
104 | * There must be at least one valid reference on the spa_t to acquire | |
105 | * the config lock. | |
106 | * | |
b128c09f | 107 | * spa_namespace_lock -> spa_config_lock[] |
34dc7c2f BB |
108 | * |
109 | * The namespace lock must always be taken before the config lock. | |
110 | * | |
111 | * | |
b128c09f | 112 | * The spa_namespace_lock can be acquired directly and is globally visible. |
34dc7c2f | 113 | * |
b128c09f BB |
114 | * The namespace is manipulated using the following functions, all of which |
115 | * require the spa_namespace_lock to be held. | |
34dc7c2f BB |
116 | * |
117 | * spa_lookup() Lookup a spa_t by name. | |
118 | * | |
119 | * spa_add() Create a new spa_t in the namespace. | |
120 | * | |
121 | * spa_remove() Remove a spa_t from the namespace. This also | |
122 | * frees up any memory associated with the spa_t. | |
123 | * | |
124 | * spa_next() Returns the next spa_t in the system, or the | |
125 | * first if NULL is passed. | |
126 | * | |
127 | * spa_evict_all() Shutdown and remove all spa_t structures in | |
128 | * the system. | |
129 | * | |
130 | * spa_guid_exists() Determine whether a pool/device guid exists. | |
131 | * | |
132 | * The spa_refcount is manipulated using the following functions: | |
133 | * | |
134 | * spa_open_ref() Adds a reference to the given spa_t. Must be | |
135 | * called with spa_namespace_lock held if the | |
136 | * refcount is currently zero. | |
137 | * | |
138 | * spa_close() Remove a reference from the spa_t. This will | |
139 | * not free the spa_t or remove it from the | |
140 | * namespace. No locking is required. | |
141 | * | |
142 | * spa_refcount_zero() Returns true if the refcount is currently | |
143 | * zero. Must be called with spa_namespace_lock | |
144 | * held. | |
145 | * | |
b128c09f BB |
146 | * The spa_config_lock[] is an array of rwlocks, ordered as follows: |
147 | * SCL_CONFIG > SCL_STATE > SCL_ALLOC > SCL_ZIO > SCL_FREE > SCL_VDEV. | |
148 | * spa_config_lock[] is manipulated with spa_config_{enter,exit,held}(). | |
149 | * | |
150 | * To read the configuration, it suffices to hold one of these locks as reader. | |
151 | * To modify the configuration, you must hold all locks as writer. To modify | |
152 | * vdev state without altering the vdev tree's topology (e.g. online/offline), | |
153 | * you must hold SCL_STATE and SCL_ZIO as writer. | |
154 | * | |
155 | * We use these distinct config locks to avoid recursive lock entry. | |
156 | * For example, spa_sync() (which holds SCL_CONFIG as reader) induces | |
157 | * block allocations (SCL_ALLOC), which may require reading space maps | |
158 | * from disk (dmu_read() -> zio_read() -> SCL_ZIO). | |
159 | * | |
160 | * The spa config locks cannot be normal rwlocks because we need the | |
161 | * ability to hand off ownership. For example, SCL_ZIO is acquired | |
162 | * by the issuing thread and later released by an interrupt thread. | |
163 | * They do, however, obey the usual write-wanted semantics to prevent | |
164 | * writer (i.e. system administrator) starvation. | |
165 | * | |
166 | * The lock acquisition rules are as follows: | |
167 | * | |
168 | * SCL_CONFIG | |
169 | * Protects changes to the vdev tree topology, such as vdev | |
170 | * add/remove/attach/detach. Protects the dirty config list | |
171 | * (spa_config_dirty_list) and the set of spares and l2arc devices. | |
172 | * | |
173 | * SCL_STATE | |
174 | * Protects changes to pool state and vdev state, such as vdev | |
175 | * online/offline/fault/degrade/clear. Protects the dirty state list | |
176 | * (spa_state_dirty_list) and global pool state (spa_state). | |
177 | * | |
178 | * SCL_ALLOC | |
179 | * Protects changes to metaslab groups and classes. | |
180 | * Held as reader by metaslab_alloc() and metaslab_claim(). | |
181 | * | |
182 | * SCL_ZIO | |
183 | * Held by bp-level zios (those which have no io_vd upon entry) | |
184 | * to prevent changes to the vdev tree. The bp-level zio implicitly | |
185 | * protects all of its vdev child zios, which do not hold SCL_ZIO. | |
186 | * | |
187 | * SCL_FREE | |
188 | * Protects changes to metaslab groups and classes. | |
189 | * Held as reader by metaslab_free(). SCL_FREE is distinct from | |
190 | * SCL_ALLOC, and lower than SCL_ZIO, so that we can safely free | |
191 | * blocks in zio_done() while another i/o that holds either | |
192 | * SCL_ALLOC or SCL_ZIO is waiting for this i/o to complete. | |
193 | * | |
194 | * SCL_VDEV | |
195 | * Held as reader to prevent changes to the vdev tree during trivial | |
428870ff | 196 | * inquiries such as bp_get_dsize(). SCL_VDEV is distinct from the |
b128c09f BB |
197 | * other locks, and lower than all of them, to ensure that it's safe |
198 | * to acquire regardless of caller context. | |
199 | * | |
200 | * In addition, the following rules apply: | |
201 | * | |
202 | * (a) spa_props_lock protects pool properties, spa_config and spa_config_list. | |
203 | * The lock ordering is SCL_CONFIG > spa_props_lock. | |
204 | * | |
205 | * (b) I/O operations on leaf vdevs. For any zio operation that takes | |
206 | * an explicit vdev_t argument -- such as zio_ioctl(), zio_read_phys(), | |
207 | * or zio_write_phys() -- the caller must ensure that the config cannot | |
208 | * cannot change in the interim, and that the vdev cannot be reopened. | |
209 | * SCL_STATE as reader suffices for both. | |
34dc7c2f BB |
210 | * |
211 | * The vdev configuration is protected by spa_vdev_enter() / spa_vdev_exit(). | |
212 | * | |
213 | * spa_vdev_enter() Acquire the namespace lock and the config lock | |
214 | * for writing. | |
215 | * | |
216 | * spa_vdev_exit() Release the config lock, wait for all I/O | |
217 | * to complete, sync the updated configs to the | |
218 | * cache, and release the namespace lock. | |
219 | * | |
b128c09f BB |
220 | * vdev state is protected by spa_vdev_state_enter() / spa_vdev_state_exit(). |
221 | * Like spa_vdev_enter/exit, these are convenience wrappers -- the actual | |
222 | * locking is, always, based on spa_namespace_lock and spa_config_lock[]. | |
223 | * | |
9ae529ec | 224 | * spa_rename() is also implemented within this file since it requires |
b128c09f | 225 | * manipulation of the namespace. |
34dc7c2f BB |
226 | */ |
227 | ||
228 | static avl_tree_t spa_namespace_avl; | |
229 | kmutex_t spa_namespace_lock; | |
230 | static kcondvar_t spa_namespace_cv; | |
34dc7c2f BB |
231 | int spa_max_replication_override = SPA_DVAS_PER_BP; |
232 | ||
233 | static kmutex_t spa_spare_lock; | |
234 | static avl_tree_t spa_spare_avl; | |
235 | static kmutex_t spa_l2cache_lock; | |
236 | static avl_tree_t spa_l2cache_avl; | |
237 | ||
238 | kmem_cache_t *spa_buffer_pool; | |
fb5f0bc8 | 239 | int spa_mode_global; |
34dc7c2f | 240 | |
0b39b9f9 PS |
241 | #ifdef ZFS_DEBUG |
242 | /* Everything except dprintf and spa is on by default in debug builds */ | |
243 | int zfs_flags = ~(ZFS_DEBUG_DPRINTF | ZFS_DEBUG_SPA); | |
244 | #else | |
245 | int zfs_flags = 0; | |
246 | #endif | |
247 | ||
248 | /* | |
249 | * zfs_recover can be set to nonzero to attempt to recover from | |
250 | * otherwise-fatal errors, typically caused by on-disk corruption. When | |
251 | * set, calls to zfs_panic_recover() will turn into warning messages. | |
252 | * This should only be used as a last resort, as it typically results | |
253 | * in leaked space, or worse. | |
254 | */ | |
255 | int zfs_recover = B_FALSE; | |
256 | ||
257 | /* | |
258 | * If destroy encounters an EIO while reading metadata (e.g. indirect | |
259 | * blocks), space referenced by the missing metadata can not be freed. | |
260 | * Normally this causes the background destroy to become "stalled", as | |
261 | * it is unable to make forward progress. While in this stalled state, | |
262 | * all remaining space to free from the error-encountering filesystem is | |
263 | * "temporarily leaked". Set this flag to cause it to ignore the EIO, | |
264 | * permanently leak the space from indirect blocks that can not be read, | |
265 | * and continue to free everything else that it can. | |
266 | * | |
267 | * The default, "stalling" behavior is useful if the storage partially | |
268 | * fails (i.e. some but not all i/os fail), and then later recovers. In | |
269 | * this case, we will be able to continue pool operations while it is | |
270 | * partially failed, and when it recovers, we can continue to free the | |
271 | * space, with no leaks. However, note that this case is actually | |
272 | * fairly rare. | |
273 | * | |
274 | * Typically pools either (a) fail completely (but perhaps temporarily, | |
275 | * e.g. a top-level vdev going offline), or (b) have localized, | |
276 | * permanent errors (e.g. disk returns the wrong data due to bit flip or | |
277 | * firmware bug). In case (a), this setting does not matter because the | |
278 | * pool will be suspended and the sync thread will not be able to make | |
279 | * forward progress regardless. In case (b), because the error is | |
280 | * permanent, the best we can do is leak the minimum amount of space, | |
281 | * which is what setting this flag will do. Therefore, it is reasonable | |
282 | * for this flag to normally be set, but we chose the more conservative | |
283 | * approach of not setting it, so that there is no possibility of | |
284 | * leaking space in the "partial temporary" failure case. | |
285 | */ | |
286 | int zfs_free_leak_on_eio = B_FALSE; | |
287 | ||
cc92e9d0 | 288 | /* |
e8b96c60 MA |
289 | * Expiration time in milliseconds. This value has two meanings. First it is |
290 | * used to determine when the spa_deadman() logic should fire. By default the | |
291 | * spa_deadman() will fire if spa_sync() has not completed in 1000 seconds. | |
292 | * Secondly, the value determines if an I/O is considered "hung". Any I/O that | |
293 | * has not completed in zfs_deadman_synctime_ms is considered "hung" resulting | |
294 | * in a system panic. | |
cc92e9d0 | 295 | */ |
e8b96c60 | 296 | unsigned long zfs_deadman_synctime_ms = 1000000ULL; |
cc92e9d0 GW |
297 | |
298 | /* | |
299 | * By default the deadman is enabled. | |
300 | */ | |
301 | int zfs_deadman_enabled = 1; | |
302 | ||
e8b96c60 MA |
303 | /* |
304 | * The worst case is single-sector max-parity RAID-Z blocks, in which | |
305 | * case the space requirement is exactly (VDEV_RAIDZ_MAXPARITY + 1) | |
306 | * times the size; so just assume that. Add to this the fact that | |
307 | * we can have up to 3 DVAs per bp, and one more factor of 2 because | |
308 | * the block may be dittoed with up to 3 DVAs by ddt_sync(). All together, | |
309 | * the worst case is: | |
310 | * (VDEV_RAIDZ_MAXPARITY + 1) * SPA_DVAS_PER_BP * 2 == 24 | |
311 | */ | |
312 | int spa_asize_inflation = 24; | |
313 | ||
3d45fdd6 MA |
314 | /* |
315 | * Normally, we don't allow the last 3.2% (1/(2^spa_slop_shift)) of space in | |
316 | * the pool to be consumed. This ensures that we don't run the pool | |
317 | * completely out of space, due to unaccounted changes (e.g. to the MOS). | |
318 | * It also limits the worst-case time to allocate space. If we have | |
319 | * less than this amount of free space, most ZPL operations (e.g. write, | |
320 | * create) will return ENOSPC. | |
321 | * | |
322 | * Certain operations (e.g. file removal, most administrative actions) can | |
323 | * use half the slop space. They will only return ENOSPC if less than half | |
324 | * the slop space is free. Typically, once the pool has less than the slop | |
325 | * space free, the user will use these operations to free up space in the pool. | |
326 | * These are the operations that call dsl_pool_adjustedsize() with the netfree | |
327 | * argument set to TRUE. | |
328 | * | |
329 | * A very restricted set of operations are always permitted, regardless of | |
330 | * the amount of free space. These are the operations that call | |
331 | * dsl_sync_task(ZFS_SPACE_CHECK_NONE), e.g. "zfs destroy". If these | |
332 | * operations result in a net increase in the amount of space used, | |
333 | * it is possible to run the pool completely out of space, causing it to | |
334 | * be permanently read-only. | |
335 | * | |
336 | * See also the comments in zfs_space_check_t. | |
337 | */ | |
338 | int spa_slop_shift = 5; | |
339 | ||
34dc7c2f BB |
340 | /* |
341 | * ========================================================================== | |
342 | * SPA config locking | |
343 | * ========================================================================== | |
344 | */ | |
345 | static void | |
b128c09f BB |
346 | spa_config_lock_init(spa_t *spa) |
347 | { | |
d6320ddb BB |
348 | int i; |
349 | ||
350 | for (i = 0; i < SCL_LOCKS; i++) { | |
b128c09f BB |
351 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; |
352 | mutex_init(&scl->scl_lock, NULL, MUTEX_DEFAULT, NULL); | |
353 | cv_init(&scl->scl_cv, NULL, CV_DEFAULT, NULL); | |
13fe0198 | 354 | refcount_create_untracked(&scl->scl_count); |
b128c09f BB |
355 | scl->scl_writer = NULL; |
356 | scl->scl_write_wanted = 0; | |
357 | } | |
34dc7c2f BB |
358 | } |
359 | ||
360 | static void | |
b128c09f BB |
361 | spa_config_lock_destroy(spa_t *spa) |
362 | { | |
d6320ddb BB |
363 | int i; |
364 | ||
365 | for (i = 0; i < SCL_LOCKS; i++) { | |
b128c09f BB |
366 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; |
367 | mutex_destroy(&scl->scl_lock); | |
368 | cv_destroy(&scl->scl_cv); | |
369 | refcount_destroy(&scl->scl_count); | |
370 | ASSERT(scl->scl_writer == NULL); | |
371 | ASSERT(scl->scl_write_wanted == 0); | |
372 | } | |
373 | } | |
374 | ||
375 | int | |
376 | spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw) | |
34dc7c2f | 377 | { |
d6320ddb BB |
378 | int i; |
379 | ||
380 | for (i = 0; i < SCL_LOCKS; i++) { | |
b128c09f BB |
381 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; |
382 | if (!(locks & (1 << i))) | |
383 | continue; | |
384 | mutex_enter(&scl->scl_lock); | |
385 | if (rw == RW_READER) { | |
386 | if (scl->scl_writer || scl->scl_write_wanted) { | |
387 | mutex_exit(&scl->scl_lock); | |
388 | spa_config_exit(spa, locks ^ (1 << i), tag); | |
389 | return (0); | |
390 | } | |
391 | } else { | |
392 | ASSERT(scl->scl_writer != curthread); | |
393 | if (!refcount_is_zero(&scl->scl_count)) { | |
394 | mutex_exit(&scl->scl_lock); | |
395 | spa_config_exit(spa, locks ^ (1 << i), tag); | |
396 | return (0); | |
397 | } | |
398 | scl->scl_writer = curthread; | |
399 | } | |
400 | (void) refcount_add(&scl->scl_count, tag); | |
401 | mutex_exit(&scl->scl_lock); | |
402 | } | |
403 | return (1); | |
34dc7c2f BB |
404 | } |
405 | ||
406 | void | |
b128c09f | 407 | spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw) |
34dc7c2f | 408 | { |
45d1cae3 | 409 | int wlocks_held = 0; |
d6320ddb | 410 | int i; |
45d1cae3 | 411 | |
13fe0198 MA |
412 | ASSERT3U(SCL_LOCKS, <, sizeof (wlocks_held) * NBBY); |
413 | ||
d6320ddb | 414 | for (i = 0; i < SCL_LOCKS; i++) { |
b128c09f | 415 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; |
45d1cae3 BB |
416 | if (scl->scl_writer == curthread) |
417 | wlocks_held |= (1 << i); | |
b128c09f BB |
418 | if (!(locks & (1 << i))) |
419 | continue; | |
420 | mutex_enter(&scl->scl_lock); | |
421 | if (rw == RW_READER) { | |
422 | while (scl->scl_writer || scl->scl_write_wanted) { | |
423 | cv_wait(&scl->scl_cv, &scl->scl_lock); | |
424 | } | |
425 | } else { | |
426 | ASSERT(scl->scl_writer != curthread); | |
427 | while (!refcount_is_zero(&scl->scl_count)) { | |
428 | scl->scl_write_wanted++; | |
429 | cv_wait(&scl->scl_cv, &scl->scl_lock); | |
430 | scl->scl_write_wanted--; | |
431 | } | |
432 | scl->scl_writer = curthread; | |
433 | } | |
434 | (void) refcount_add(&scl->scl_count, tag); | |
435 | mutex_exit(&scl->scl_lock); | |
34dc7c2f | 436 | } |
45d1cae3 | 437 | ASSERT(wlocks_held <= locks); |
34dc7c2f BB |
438 | } |
439 | ||
440 | void | |
b128c09f | 441 | spa_config_exit(spa_t *spa, int locks, void *tag) |
34dc7c2f | 442 | { |
d6320ddb BB |
443 | int i; |
444 | ||
445 | for (i = SCL_LOCKS - 1; i >= 0; i--) { | |
b128c09f BB |
446 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; |
447 | if (!(locks & (1 << i))) | |
448 | continue; | |
449 | mutex_enter(&scl->scl_lock); | |
450 | ASSERT(!refcount_is_zero(&scl->scl_count)); | |
451 | if (refcount_remove(&scl->scl_count, tag) == 0) { | |
452 | ASSERT(scl->scl_writer == NULL || | |
453 | scl->scl_writer == curthread); | |
454 | scl->scl_writer = NULL; /* OK in either case */ | |
455 | cv_broadcast(&scl->scl_cv); | |
456 | } | |
457 | mutex_exit(&scl->scl_lock); | |
34dc7c2f | 458 | } |
34dc7c2f BB |
459 | } |
460 | ||
b128c09f BB |
461 | int |
462 | spa_config_held(spa_t *spa, int locks, krw_t rw) | |
34dc7c2f | 463 | { |
d6320ddb | 464 | int i, locks_held = 0; |
34dc7c2f | 465 | |
d6320ddb | 466 | for (i = 0; i < SCL_LOCKS; i++) { |
b128c09f BB |
467 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; |
468 | if (!(locks & (1 << i))) | |
469 | continue; | |
470 | if ((rw == RW_READER && !refcount_is_zero(&scl->scl_count)) || | |
471 | (rw == RW_WRITER && scl->scl_writer == curthread)) | |
472 | locks_held |= 1 << i; | |
473 | } | |
474 | ||
475 | return (locks_held); | |
34dc7c2f BB |
476 | } |
477 | ||
478 | /* | |
479 | * ========================================================================== | |
480 | * SPA namespace functions | |
481 | * ========================================================================== | |
482 | */ | |
483 | ||
484 | /* | |
485 | * Lookup the named spa_t in the AVL tree. The spa_namespace_lock must be held. | |
486 | * Returns NULL if no matching spa_t is found. | |
487 | */ | |
488 | spa_t * | |
489 | spa_lookup(const char *name) | |
490 | { | |
b128c09f BB |
491 | static spa_t search; /* spa_t is large; don't allocate on stack */ |
492 | spa_t *spa; | |
34dc7c2f | 493 | avl_index_t where; |
34dc7c2f BB |
494 | char *cp; |
495 | ||
496 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
497 | ||
13fe0198 MA |
498 | (void) strlcpy(search.spa_name, name, sizeof (search.spa_name)); |
499 | ||
34dc7c2f BB |
500 | /* |
501 | * If it's a full dataset name, figure out the pool name and | |
502 | * just use that. | |
503 | */ | |
da536844 | 504 | cp = strpbrk(search.spa_name, "/@#"); |
13fe0198 | 505 | if (cp != NULL) |
34dc7c2f | 506 | *cp = '\0'; |
34dc7c2f | 507 | |
34dc7c2f BB |
508 | spa = avl_find(&spa_namespace_avl, &search, &where); |
509 | ||
34dc7c2f BB |
510 | return (spa); |
511 | } | |
512 | ||
cc92e9d0 GW |
513 | /* |
514 | * Fires when spa_sync has not completed within zfs_deadman_synctime_ms. | |
515 | * If the zfs_deadman_enabled flag is set then it inspects all vdev queues | |
516 | * looking for potentially hung I/Os. | |
517 | */ | |
518 | void | |
519 | spa_deadman(void *arg) | |
520 | { | |
521 | spa_t *spa = arg; | |
522 | ||
523 | zfs_dbgmsg("slow spa_sync: started %llu seconds ago, calls %llu", | |
524 | (gethrtime() - spa->spa_sync_starttime) / NANOSEC, | |
525 | ++spa->spa_deadman_calls); | |
526 | if (zfs_deadman_enabled) | |
527 | vdev_deadman(spa->spa_root_vdev); | |
528 | ||
529 | spa->spa_deadman_tqid = taskq_dispatch_delay(system_taskq, | |
79c76d5b | 530 | spa_deadman, spa, KM_SLEEP, ddi_get_lbolt() + |
cc92e9d0 GW |
531 | NSEC_TO_TICK(spa->spa_deadman_synctime)); |
532 | } | |
533 | ||
34dc7c2f BB |
534 | /* |
535 | * Create an uninitialized spa_t with the given name. Requires | |
536 | * spa_namespace_lock. The caller must ensure that the spa_t doesn't already | |
537 | * exist by calling spa_lookup() first. | |
538 | */ | |
539 | spa_t * | |
428870ff | 540 | spa_add(const char *name, nvlist_t *config, const char *altroot) |
34dc7c2f BB |
541 | { |
542 | spa_t *spa; | |
b128c09f | 543 | spa_config_dirent_t *dp; |
d6320ddb | 544 | int t; |
b0bc7a84 | 545 | int i; |
34dc7c2f BB |
546 | |
547 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
548 | ||
79c76d5b | 549 | spa = kmem_zalloc(sizeof (spa_t), KM_SLEEP); |
34dc7c2f | 550 | |
34dc7c2f | 551 | mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL); |
34dc7c2f | 552 | mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL); |
428870ff | 553 | mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL); |
0c66c32d | 554 | mutex_init(&spa->spa_evicting_os_lock, NULL, MUTEX_DEFAULT, NULL); |
34dc7c2f | 555 | mutex_init(&spa->spa_history_lock, NULL, MUTEX_DEFAULT, NULL); |
428870ff | 556 | mutex_init(&spa->spa_proc_lock, NULL, MUTEX_DEFAULT, NULL); |
34dc7c2f | 557 | mutex_init(&spa->spa_props_lock, NULL, MUTEX_DEFAULT, NULL); |
428870ff BB |
558 | mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL); |
559 | mutex_init(&spa->spa_suspend_lock, NULL, MUTEX_DEFAULT, NULL); | |
560 | mutex_init(&spa->spa_vdev_top_lock, NULL, MUTEX_DEFAULT, NULL); | |
4eb30c68 | 561 | mutex_init(&spa->spa_feat_stats_lock, NULL, MUTEX_DEFAULT, NULL); |
34dc7c2f BB |
562 | |
563 | cv_init(&spa->spa_async_cv, NULL, CV_DEFAULT, NULL); | |
0c66c32d | 564 | cv_init(&spa->spa_evicting_os_cv, NULL, CV_DEFAULT, NULL); |
428870ff | 565 | cv_init(&spa->spa_proc_cv, NULL, CV_DEFAULT, NULL); |
34dc7c2f | 566 | cv_init(&spa->spa_scrub_io_cv, NULL, CV_DEFAULT, NULL); |
b128c09f | 567 | cv_init(&spa->spa_suspend_cv, NULL, CV_DEFAULT, NULL); |
34dc7c2f | 568 | |
d6320ddb | 569 | for (t = 0; t < TXG_SIZE; t++) |
428870ff BB |
570 | bplist_create(&spa->spa_free_bplist[t]); |
571 | ||
b128c09f | 572 | (void) strlcpy(spa->spa_name, name, sizeof (spa->spa_name)); |
34dc7c2f BB |
573 | spa->spa_state = POOL_STATE_UNINITIALIZED; |
574 | spa->spa_freeze_txg = UINT64_MAX; | |
575 | spa->spa_final_txg = UINT64_MAX; | |
428870ff BB |
576 | spa->spa_load_max_txg = UINT64_MAX; |
577 | spa->spa_proc = &p0; | |
578 | spa->spa_proc_state = SPA_PROC_NONE; | |
34dc7c2f | 579 | |
e8b96c60 | 580 | spa->spa_deadman_synctime = MSEC2NSEC(zfs_deadman_synctime_ms); |
cc92e9d0 | 581 | |
34dc7c2f | 582 | refcount_create(&spa->spa_refcount); |
b128c09f | 583 | spa_config_lock_init(spa); |
1421c891 | 584 | spa_stats_init(spa); |
34dc7c2f BB |
585 | |
586 | avl_add(&spa_namespace_avl, spa); | |
587 | ||
34dc7c2f BB |
588 | /* |
589 | * Set the alternate root, if there is one. | |
590 | */ | |
0336f3d0 | 591 | if (altroot) |
34dc7c2f | 592 | spa->spa_root = spa_strdup(altroot); |
34dc7c2f | 593 | |
b128c09f BB |
594 | /* |
595 | * Every pool starts with the default cachefile | |
596 | */ | |
597 | list_create(&spa->spa_config_list, sizeof (spa_config_dirent_t), | |
598 | offsetof(spa_config_dirent_t, scd_link)); | |
599 | ||
79c76d5b | 600 | dp = kmem_zalloc(sizeof (spa_config_dirent_t), KM_SLEEP); |
428870ff | 601 | dp->scd_path = altroot ? NULL : spa_strdup(spa_config_path); |
b128c09f BB |
602 | list_insert_head(&spa->spa_config_list, dp); |
603 | ||
572e2857 | 604 | VERIFY(nvlist_alloc(&spa->spa_load_info, NV_UNIQUE_NAME, |
79c76d5b | 605 | KM_SLEEP) == 0); |
572e2857 | 606 | |
9ae529ec CS |
607 | if (config != NULL) { |
608 | nvlist_t *features; | |
609 | ||
610 | if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_FEATURES_FOR_READ, | |
611 | &features) == 0) { | |
612 | VERIFY(nvlist_dup(features, &spa->spa_label_features, | |
613 | 0) == 0); | |
614 | } | |
615 | ||
428870ff | 616 | VERIFY(nvlist_dup(config, &spa->spa_config, 0) == 0); |
9ae529ec CS |
617 | } |
618 | ||
619 | if (spa->spa_label_features == NULL) { | |
620 | VERIFY(nvlist_alloc(&spa->spa_label_features, NV_UNIQUE_NAME, | |
79c76d5b | 621 | KM_SLEEP) == 0); |
9ae529ec | 622 | } |
428870ff | 623 | |
13fe0198 MA |
624 | spa->spa_debug = ((zfs_flags & ZFS_DEBUG_SPA) != 0); |
625 | ||
b0bc7a84 MG |
626 | /* |
627 | * As a pool is being created, treat all features as disabled by | |
628 | * setting SPA_FEATURE_DISABLED for all entries in the feature | |
629 | * refcount cache. | |
630 | */ | |
631 | for (i = 0; i < SPA_FEATURES; i++) { | |
632 | spa->spa_feat_refcount_cache[i] = SPA_FEATURE_DISABLED; | |
633 | } | |
634 | ||
34dc7c2f BB |
635 | return (spa); |
636 | } | |
637 | ||
638 | /* | |
639 | * Removes a spa_t from the namespace, freeing up any memory used. Requires | |
640 | * spa_namespace_lock. This is called only after the spa_t has been closed and | |
641 | * deactivated. | |
642 | */ | |
643 | void | |
644 | spa_remove(spa_t *spa) | |
645 | { | |
b128c09f | 646 | spa_config_dirent_t *dp; |
d6320ddb | 647 | int t; |
b128c09f | 648 | |
34dc7c2f BB |
649 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); |
650 | ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); | |
0c66c32d | 651 | ASSERT3U(refcount_count(&spa->spa_refcount), ==, 0); |
34dc7c2f | 652 | |
428870ff BB |
653 | nvlist_free(spa->spa_config_splitting); |
654 | ||
34dc7c2f BB |
655 | avl_remove(&spa_namespace_avl, spa); |
656 | cv_broadcast(&spa_namespace_cv); | |
657 | ||
0336f3d0 | 658 | if (spa->spa_root) |
34dc7c2f | 659 | spa_strfree(spa->spa_root); |
34dc7c2f | 660 | |
b128c09f BB |
661 | while ((dp = list_head(&spa->spa_config_list)) != NULL) { |
662 | list_remove(&spa->spa_config_list, dp); | |
663 | if (dp->scd_path != NULL) | |
664 | spa_strfree(dp->scd_path); | |
665 | kmem_free(dp, sizeof (spa_config_dirent_t)); | |
666 | } | |
34dc7c2f | 667 | |
b128c09f | 668 | list_destroy(&spa->spa_config_list); |
34dc7c2f | 669 | |
9ae529ec | 670 | nvlist_free(spa->spa_label_features); |
572e2857 | 671 | nvlist_free(spa->spa_load_info); |
417104bd | 672 | nvlist_free(spa->spa_feat_stats); |
34dc7c2f BB |
673 | spa_config_set(spa, NULL); |
674 | ||
675 | refcount_destroy(&spa->spa_refcount); | |
676 | ||
1421c891 | 677 | spa_stats_destroy(spa); |
b128c09f | 678 | spa_config_lock_destroy(spa); |
34dc7c2f | 679 | |
d6320ddb | 680 | for (t = 0; t < TXG_SIZE; t++) |
428870ff BB |
681 | bplist_destroy(&spa->spa_free_bplist[t]); |
682 | ||
34dc7c2f | 683 | cv_destroy(&spa->spa_async_cv); |
0c66c32d | 684 | cv_destroy(&spa->spa_evicting_os_cv); |
428870ff | 685 | cv_destroy(&spa->spa_proc_cv); |
34dc7c2f | 686 | cv_destroy(&spa->spa_scrub_io_cv); |
b128c09f | 687 | cv_destroy(&spa->spa_suspend_cv); |
34dc7c2f | 688 | |
34dc7c2f | 689 | mutex_destroy(&spa->spa_async_lock); |
34dc7c2f | 690 | mutex_destroy(&spa->spa_errlist_lock); |
428870ff | 691 | mutex_destroy(&spa->spa_errlog_lock); |
0c66c32d | 692 | mutex_destroy(&spa->spa_evicting_os_lock); |
34dc7c2f | 693 | mutex_destroy(&spa->spa_history_lock); |
428870ff | 694 | mutex_destroy(&spa->spa_proc_lock); |
34dc7c2f | 695 | mutex_destroy(&spa->spa_props_lock); |
428870ff | 696 | mutex_destroy(&spa->spa_scrub_lock); |
b128c09f | 697 | mutex_destroy(&spa->spa_suspend_lock); |
428870ff | 698 | mutex_destroy(&spa->spa_vdev_top_lock); |
4eb30c68 | 699 | mutex_destroy(&spa->spa_feat_stats_lock); |
34dc7c2f BB |
700 | |
701 | kmem_free(spa, sizeof (spa_t)); | |
702 | } | |
703 | ||
704 | /* | |
705 | * Given a pool, return the next pool in the namespace, or NULL if there is | |
706 | * none. If 'prev' is NULL, return the first pool. | |
707 | */ | |
708 | spa_t * | |
709 | spa_next(spa_t *prev) | |
710 | { | |
711 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
712 | ||
713 | if (prev) | |
714 | return (AVL_NEXT(&spa_namespace_avl, prev)); | |
715 | else | |
716 | return (avl_first(&spa_namespace_avl)); | |
717 | } | |
718 | ||
719 | /* | |
720 | * ========================================================================== | |
721 | * SPA refcount functions | |
722 | * ========================================================================== | |
723 | */ | |
724 | ||
725 | /* | |
726 | * Add a reference to the given spa_t. Must have at least one reference, or | |
727 | * have the namespace lock held. | |
728 | */ | |
729 | void | |
730 | spa_open_ref(spa_t *spa, void *tag) | |
731 | { | |
b128c09f | 732 | ASSERT(refcount_count(&spa->spa_refcount) >= spa->spa_minref || |
34dc7c2f | 733 | MUTEX_HELD(&spa_namespace_lock)); |
34dc7c2f BB |
734 | (void) refcount_add(&spa->spa_refcount, tag); |
735 | } | |
736 | ||
737 | /* | |
738 | * Remove a reference to the given spa_t. Must have at least one reference, or | |
739 | * have the namespace lock held. | |
740 | */ | |
741 | void | |
742 | spa_close(spa_t *spa, void *tag) | |
743 | { | |
b128c09f | 744 | ASSERT(refcount_count(&spa->spa_refcount) > spa->spa_minref || |
34dc7c2f | 745 | MUTEX_HELD(&spa_namespace_lock)); |
34dc7c2f BB |
746 | (void) refcount_remove(&spa->spa_refcount, tag); |
747 | } | |
748 | ||
0c66c32d JG |
749 | /* |
750 | * Remove a reference to the given spa_t held by a dsl dir that is | |
751 | * being asynchronously released. Async releases occur from a taskq | |
752 | * performing eviction of dsl datasets and dirs. The namespace lock | |
753 | * isn't held and the hold by the object being evicted may contribute to | |
754 | * spa_minref (e.g. dataset or directory released during pool export), | |
755 | * so the asserts in spa_close() do not apply. | |
756 | */ | |
757 | void | |
758 | spa_async_close(spa_t *spa, void *tag) | |
759 | { | |
760 | (void) refcount_remove(&spa->spa_refcount, tag); | |
761 | } | |
762 | ||
34dc7c2f BB |
763 | /* |
764 | * Check to see if the spa refcount is zero. Must be called with | |
b128c09f | 765 | * spa_namespace_lock held. We really compare against spa_minref, which is the |
34dc7c2f BB |
766 | * number of references acquired when opening a pool |
767 | */ | |
768 | boolean_t | |
769 | spa_refcount_zero(spa_t *spa) | |
770 | { | |
771 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
772 | ||
b128c09f | 773 | return (refcount_count(&spa->spa_refcount) == spa->spa_minref); |
34dc7c2f BB |
774 | } |
775 | ||
776 | /* | |
777 | * ========================================================================== | |
778 | * SPA spare and l2cache tracking | |
779 | * ========================================================================== | |
780 | */ | |
781 | ||
782 | /* | |
783 | * Hot spares and cache devices are tracked using the same code below, | |
784 | * for 'auxiliary' devices. | |
785 | */ | |
786 | ||
787 | typedef struct spa_aux { | |
788 | uint64_t aux_guid; | |
789 | uint64_t aux_pool; | |
790 | avl_node_t aux_avl; | |
791 | int aux_count; | |
792 | } spa_aux_t; | |
793 | ||
794 | static int | |
795 | spa_aux_compare(const void *a, const void *b) | |
796 | { | |
797 | const spa_aux_t *sa = a; | |
798 | const spa_aux_t *sb = b; | |
799 | ||
800 | if (sa->aux_guid < sb->aux_guid) | |
801 | return (-1); | |
802 | else if (sa->aux_guid > sb->aux_guid) | |
803 | return (1); | |
804 | else | |
805 | return (0); | |
806 | } | |
807 | ||
808 | void | |
809 | spa_aux_add(vdev_t *vd, avl_tree_t *avl) | |
810 | { | |
811 | avl_index_t where; | |
812 | spa_aux_t search; | |
813 | spa_aux_t *aux; | |
814 | ||
815 | search.aux_guid = vd->vdev_guid; | |
816 | if ((aux = avl_find(avl, &search, &where)) != NULL) { | |
817 | aux->aux_count++; | |
818 | } else { | |
79c76d5b | 819 | aux = kmem_zalloc(sizeof (spa_aux_t), KM_SLEEP); |
34dc7c2f BB |
820 | aux->aux_guid = vd->vdev_guid; |
821 | aux->aux_count = 1; | |
822 | avl_insert(avl, aux, where); | |
823 | } | |
824 | } | |
825 | ||
826 | void | |
827 | spa_aux_remove(vdev_t *vd, avl_tree_t *avl) | |
828 | { | |
829 | spa_aux_t search; | |
830 | spa_aux_t *aux; | |
831 | avl_index_t where; | |
832 | ||
833 | search.aux_guid = vd->vdev_guid; | |
834 | aux = avl_find(avl, &search, &where); | |
835 | ||
836 | ASSERT(aux != NULL); | |
837 | ||
838 | if (--aux->aux_count == 0) { | |
839 | avl_remove(avl, aux); | |
840 | kmem_free(aux, sizeof (spa_aux_t)); | |
841 | } else if (aux->aux_pool == spa_guid(vd->vdev_spa)) { | |
842 | aux->aux_pool = 0ULL; | |
843 | } | |
844 | } | |
845 | ||
846 | boolean_t | |
b128c09f | 847 | spa_aux_exists(uint64_t guid, uint64_t *pool, int *refcnt, avl_tree_t *avl) |
34dc7c2f BB |
848 | { |
849 | spa_aux_t search, *found; | |
34dc7c2f BB |
850 | |
851 | search.aux_guid = guid; | |
b128c09f | 852 | found = avl_find(avl, &search, NULL); |
34dc7c2f BB |
853 | |
854 | if (pool) { | |
855 | if (found) | |
856 | *pool = found->aux_pool; | |
857 | else | |
858 | *pool = 0ULL; | |
859 | } | |
860 | ||
b128c09f BB |
861 | if (refcnt) { |
862 | if (found) | |
863 | *refcnt = found->aux_count; | |
864 | else | |
865 | *refcnt = 0; | |
866 | } | |
867 | ||
34dc7c2f BB |
868 | return (found != NULL); |
869 | } | |
870 | ||
871 | void | |
872 | spa_aux_activate(vdev_t *vd, avl_tree_t *avl) | |
873 | { | |
874 | spa_aux_t search, *found; | |
875 | avl_index_t where; | |
876 | ||
877 | search.aux_guid = vd->vdev_guid; | |
878 | found = avl_find(avl, &search, &where); | |
879 | ASSERT(found != NULL); | |
880 | ASSERT(found->aux_pool == 0ULL); | |
881 | ||
882 | found->aux_pool = spa_guid(vd->vdev_spa); | |
883 | } | |
884 | ||
885 | /* | |
886 | * Spares are tracked globally due to the following constraints: | |
887 | * | |
888 | * - A spare may be part of multiple pools. | |
889 | * - A spare may be added to a pool even if it's actively in use within | |
890 | * another pool. | |
891 | * - A spare in use in any pool can only be the source of a replacement if | |
892 | * the target is a spare in the same pool. | |
893 | * | |
894 | * We keep track of all spares on the system through the use of a reference | |
895 | * counted AVL tree. When a vdev is added as a spare, or used as a replacement | |
896 | * spare, then we bump the reference count in the AVL tree. In addition, we set | |
897 | * the 'vdev_isspare' member to indicate that the device is a spare (active or | |
898 | * inactive). When a spare is made active (used to replace a device in the | |
899 | * pool), we also keep track of which pool its been made a part of. | |
900 | * | |
901 | * The 'spa_spare_lock' protects the AVL tree. These functions are normally | |
902 | * called under the spa_namespace lock as part of vdev reconfiguration. The | |
903 | * separate spare lock exists for the status query path, which does not need to | |
904 | * be completely consistent with respect to other vdev configuration changes. | |
905 | */ | |
906 | ||
907 | static int | |
908 | spa_spare_compare(const void *a, const void *b) | |
909 | { | |
910 | return (spa_aux_compare(a, b)); | |
911 | } | |
912 | ||
913 | void | |
914 | spa_spare_add(vdev_t *vd) | |
915 | { | |
916 | mutex_enter(&spa_spare_lock); | |
917 | ASSERT(!vd->vdev_isspare); | |
918 | spa_aux_add(vd, &spa_spare_avl); | |
919 | vd->vdev_isspare = B_TRUE; | |
920 | mutex_exit(&spa_spare_lock); | |
921 | } | |
922 | ||
923 | void | |
924 | spa_spare_remove(vdev_t *vd) | |
925 | { | |
926 | mutex_enter(&spa_spare_lock); | |
927 | ASSERT(vd->vdev_isspare); | |
928 | spa_aux_remove(vd, &spa_spare_avl); | |
929 | vd->vdev_isspare = B_FALSE; | |
930 | mutex_exit(&spa_spare_lock); | |
931 | } | |
932 | ||
933 | boolean_t | |
b128c09f | 934 | spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt) |
34dc7c2f BB |
935 | { |
936 | boolean_t found; | |
937 | ||
938 | mutex_enter(&spa_spare_lock); | |
b128c09f | 939 | found = spa_aux_exists(guid, pool, refcnt, &spa_spare_avl); |
34dc7c2f BB |
940 | mutex_exit(&spa_spare_lock); |
941 | ||
942 | return (found); | |
943 | } | |
944 | ||
945 | void | |
946 | spa_spare_activate(vdev_t *vd) | |
947 | { | |
948 | mutex_enter(&spa_spare_lock); | |
949 | ASSERT(vd->vdev_isspare); | |
950 | spa_aux_activate(vd, &spa_spare_avl); | |
951 | mutex_exit(&spa_spare_lock); | |
952 | } | |
953 | ||
954 | /* | |
955 | * Level 2 ARC devices are tracked globally for the same reasons as spares. | |
956 | * Cache devices currently only support one pool per cache device, and so | |
957 | * for these devices the aux reference count is currently unused beyond 1. | |
958 | */ | |
959 | ||
960 | static int | |
961 | spa_l2cache_compare(const void *a, const void *b) | |
962 | { | |
963 | return (spa_aux_compare(a, b)); | |
964 | } | |
965 | ||
966 | void | |
967 | spa_l2cache_add(vdev_t *vd) | |
968 | { | |
969 | mutex_enter(&spa_l2cache_lock); | |
970 | ASSERT(!vd->vdev_isl2cache); | |
971 | spa_aux_add(vd, &spa_l2cache_avl); | |
972 | vd->vdev_isl2cache = B_TRUE; | |
973 | mutex_exit(&spa_l2cache_lock); | |
974 | } | |
975 | ||
976 | void | |
977 | spa_l2cache_remove(vdev_t *vd) | |
978 | { | |
979 | mutex_enter(&spa_l2cache_lock); | |
980 | ASSERT(vd->vdev_isl2cache); | |
981 | spa_aux_remove(vd, &spa_l2cache_avl); | |
982 | vd->vdev_isl2cache = B_FALSE; | |
983 | mutex_exit(&spa_l2cache_lock); | |
984 | } | |
985 | ||
986 | boolean_t | |
987 | spa_l2cache_exists(uint64_t guid, uint64_t *pool) | |
988 | { | |
989 | boolean_t found; | |
990 | ||
991 | mutex_enter(&spa_l2cache_lock); | |
b128c09f | 992 | found = spa_aux_exists(guid, pool, NULL, &spa_l2cache_avl); |
34dc7c2f BB |
993 | mutex_exit(&spa_l2cache_lock); |
994 | ||
995 | return (found); | |
996 | } | |
997 | ||
998 | void | |
999 | spa_l2cache_activate(vdev_t *vd) | |
1000 | { | |
1001 | mutex_enter(&spa_l2cache_lock); | |
1002 | ASSERT(vd->vdev_isl2cache); | |
1003 | spa_aux_activate(vd, &spa_l2cache_avl); | |
1004 | mutex_exit(&spa_l2cache_lock); | |
1005 | } | |
1006 | ||
34dc7c2f BB |
1007 | /* |
1008 | * ========================================================================== | |
1009 | * SPA vdev locking | |
1010 | * ========================================================================== | |
1011 | */ | |
1012 | ||
1013 | /* | |
1014 | * Lock the given spa_t for the purpose of adding or removing a vdev. | |
1015 | * Grabs the global spa_namespace_lock plus the spa config lock for writing. | |
1016 | * It returns the next transaction group for the spa_t. | |
1017 | */ | |
1018 | uint64_t | |
1019 | spa_vdev_enter(spa_t *spa) | |
1020 | { | |
428870ff | 1021 | mutex_enter(&spa->spa_vdev_top_lock); |
34dc7c2f | 1022 | mutex_enter(&spa_namespace_lock); |
428870ff BB |
1023 | return (spa_vdev_config_enter(spa)); |
1024 | } | |
1025 | ||
1026 | /* | |
1027 | * Internal implementation for spa_vdev_enter(). Used when a vdev | |
1028 | * operation requires multiple syncs (i.e. removing a device) while | |
1029 | * keeping the spa_namespace_lock held. | |
1030 | */ | |
1031 | uint64_t | |
1032 | spa_vdev_config_enter(spa_t *spa) | |
1033 | { | |
1034 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
34dc7c2f | 1035 | |
b128c09f | 1036 | spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); |
34dc7c2f BB |
1037 | |
1038 | return (spa_last_synced_txg(spa) + 1); | |
1039 | } | |
1040 | ||
1041 | /* | |
428870ff BB |
1042 | * Used in combination with spa_vdev_config_enter() to allow the syncing |
1043 | * of multiple transactions without releasing the spa_namespace_lock. | |
34dc7c2f | 1044 | */ |
428870ff BB |
1045 | void |
1046 | spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error, char *tag) | |
34dc7c2f BB |
1047 | { |
1048 | int config_changed = B_FALSE; | |
1049 | ||
d6320ddb | 1050 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); |
34dc7c2f BB |
1051 | ASSERT(txg > spa_last_synced_txg(spa)); |
1052 | ||
b128c09f BB |
1053 | spa->spa_pending_vdev = NULL; |
1054 | ||
34dc7c2f BB |
1055 | /* |
1056 | * Reassess the DTLs. | |
1057 | */ | |
1058 | vdev_dtl_reassess(spa->spa_root_vdev, 0, 0, B_FALSE); | |
1059 | ||
b128c09f | 1060 | if (error == 0 && !list_is_empty(&spa->spa_config_dirty_list)) { |
34dc7c2f | 1061 | config_changed = B_TRUE; |
428870ff | 1062 | spa->spa_config_generation++; |
34dc7c2f BB |
1063 | } |
1064 | ||
428870ff BB |
1065 | /* |
1066 | * Verify the metaslab classes. | |
1067 | */ | |
1068 | ASSERT(metaslab_class_validate(spa_normal_class(spa)) == 0); | |
1069 | ASSERT(metaslab_class_validate(spa_log_class(spa)) == 0); | |
1070 | ||
b128c09f | 1071 | spa_config_exit(spa, SCL_ALL, spa); |
34dc7c2f | 1072 | |
428870ff BB |
1073 | /* |
1074 | * Panic the system if the specified tag requires it. This | |
1075 | * is useful for ensuring that configurations are updated | |
1076 | * transactionally. | |
1077 | */ | |
1078 | if (zio_injection_enabled) | |
1079 | zio_handle_panic_injection(spa, tag, 0); | |
1080 | ||
34dc7c2f BB |
1081 | /* |
1082 | * Note: this txg_wait_synced() is important because it ensures | |
1083 | * that there won't be more than one config change per txg. | |
1084 | * This allows us to use the txg as the generation number. | |
1085 | */ | |
1086 | if (error == 0) | |
1087 | txg_wait_synced(spa->spa_dsl_pool, txg); | |
1088 | ||
1089 | if (vd != NULL) { | |
93cf2076 | 1090 | ASSERT(!vd->vdev_detached || vd->vdev_dtl_sm == NULL); |
fb5f0bc8 | 1091 | spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); |
34dc7c2f | 1092 | vdev_free(vd); |
fb5f0bc8 | 1093 | spa_config_exit(spa, SCL_ALL, spa); |
34dc7c2f BB |
1094 | } |
1095 | ||
1096 | /* | |
1097 | * If the config changed, update the config cache. | |
1098 | */ | |
1099 | if (config_changed) | |
b128c09f | 1100 | spa_config_sync(spa, B_FALSE, B_TRUE); |
428870ff | 1101 | } |
34dc7c2f | 1102 | |
428870ff BB |
1103 | /* |
1104 | * Unlock the spa_t after adding or removing a vdev. Besides undoing the | |
1105 | * locking of spa_vdev_enter(), we also want make sure the transactions have | |
1106 | * synced to disk, and then update the global configuration cache with the new | |
1107 | * information. | |
1108 | */ | |
1109 | int | |
1110 | spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error) | |
1111 | { | |
1112 | spa_vdev_config_exit(spa, vd, txg, error, FTAG); | |
34dc7c2f | 1113 | mutex_exit(&spa_namespace_lock); |
428870ff | 1114 | mutex_exit(&spa->spa_vdev_top_lock); |
34dc7c2f BB |
1115 | |
1116 | return (error); | |
1117 | } | |
1118 | ||
b128c09f BB |
1119 | /* |
1120 | * Lock the given spa_t for the purpose of changing vdev state. | |
1121 | */ | |
1122 | void | |
428870ff | 1123 | spa_vdev_state_enter(spa_t *spa, int oplocks) |
b128c09f | 1124 | { |
428870ff BB |
1125 | int locks = SCL_STATE_ALL | oplocks; |
1126 | ||
1127 | /* | |
1128 | * Root pools may need to read of the underlying devfs filesystem | |
1129 | * when opening up a vdev. Unfortunately if we're holding the | |
1130 | * SCL_ZIO lock it will result in a deadlock when we try to issue | |
1131 | * the read from the root filesystem. Instead we "prefetch" | |
1132 | * the associated vnodes that we need prior to opening the | |
1133 | * underlying devices and cache them so that we can prevent | |
1134 | * any I/O when we are doing the actual open. | |
1135 | */ | |
1136 | if (spa_is_root(spa)) { | |
1137 | int low = locks & ~(SCL_ZIO - 1); | |
1138 | int high = locks & ~low; | |
1139 | ||
1140 | spa_config_enter(spa, high, spa, RW_WRITER); | |
1141 | vdev_hold(spa->spa_root_vdev); | |
1142 | spa_config_enter(spa, low, spa, RW_WRITER); | |
1143 | } else { | |
1144 | spa_config_enter(spa, locks, spa, RW_WRITER); | |
1145 | } | |
1146 | spa->spa_vdev_locks = locks; | |
b128c09f BB |
1147 | } |
1148 | ||
1149 | int | |
1150 | spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error) | |
1151 | { | |
428870ff BB |
1152 | boolean_t config_changed = B_FALSE; |
1153 | ||
1154 | if (vd != NULL || error == 0) | |
1155 | vdev_dtl_reassess(vd ? vd->vdev_top : spa->spa_root_vdev, | |
1156 | 0, 0, B_FALSE); | |
1157 | ||
1158 | if (vd != NULL) { | |
b128c09f | 1159 | vdev_state_dirty(vd->vdev_top); |
428870ff BB |
1160 | config_changed = B_TRUE; |
1161 | spa->spa_config_generation++; | |
1162 | } | |
b128c09f | 1163 | |
428870ff BB |
1164 | if (spa_is_root(spa)) |
1165 | vdev_rele(spa->spa_root_vdev); | |
1166 | ||
1167 | ASSERT3U(spa->spa_vdev_locks, >=, SCL_STATE_ALL); | |
1168 | spa_config_exit(spa, spa->spa_vdev_locks, spa); | |
b128c09f | 1169 | |
fb5f0bc8 BB |
1170 | /* |
1171 | * If anything changed, wait for it to sync. This ensures that, | |
1172 | * from the system administrator's perspective, zpool(1M) commands | |
1173 | * are synchronous. This is important for things like zpool offline: | |
1174 | * when the command completes, you expect no further I/O from ZFS. | |
1175 | */ | |
1176 | if (vd != NULL) | |
1177 | txg_wait_synced(spa->spa_dsl_pool, 0); | |
1178 | ||
428870ff BB |
1179 | /* |
1180 | * If the config changed, update the config cache. | |
1181 | */ | |
1182 | if (config_changed) { | |
1183 | mutex_enter(&spa_namespace_lock); | |
1184 | spa_config_sync(spa, B_FALSE, B_TRUE); | |
1185 | mutex_exit(&spa_namespace_lock); | |
1186 | } | |
1187 | ||
b128c09f BB |
1188 | return (error); |
1189 | } | |
1190 | ||
34dc7c2f BB |
1191 | /* |
1192 | * ========================================================================== | |
1193 | * Miscellaneous functions | |
1194 | * ========================================================================== | |
1195 | */ | |
1196 | ||
9ae529ec | 1197 | void |
b0bc7a84 | 1198 | spa_activate_mos_feature(spa_t *spa, const char *feature, dmu_tx_t *tx) |
9ae529ec | 1199 | { |
fa86b5db MA |
1200 | if (!nvlist_exists(spa->spa_label_features, feature)) { |
1201 | fnvlist_add_boolean(spa->spa_label_features, feature); | |
b0bc7a84 MG |
1202 | /* |
1203 | * When we are creating the pool (tx_txg==TXG_INITIAL), we can't | |
1204 | * dirty the vdev config because lock SCL_CONFIG is not held. | |
1205 | * Thankfully, in this case we don't need to dirty the config | |
1206 | * because it will be written out anyway when we finish | |
1207 | * creating the pool. | |
1208 | */ | |
1209 | if (tx->tx_txg != TXG_INITIAL) | |
1210 | vdev_config_dirty(spa->spa_root_vdev); | |
fa86b5db | 1211 | } |
9ae529ec CS |
1212 | } |
1213 | ||
1214 | void | |
1215 | spa_deactivate_mos_feature(spa_t *spa, const char *feature) | |
1216 | { | |
fa86b5db MA |
1217 | if (nvlist_remove_all(spa->spa_label_features, feature) == 0) |
1218 | vdev_config_dirty(spa->spa_root_vdev); | |
9ae529ec CS |
1219 | } |
1220 | ||
34dc7c2f BB |
1221 | /* |
1222 | * Rename a spa_t. | |
1223 | */ | |
1224 | int | |
1225 | spa_rename(const char *name, const char *newname) | |
1226 | { | |
1227 | spa_t *spa; | |
1228 | int err; | |
1229 | ||
1230 | /* | |
1231 | * Lookup the spa_t and grab the config lock for writing. We need to | |
1232 | * actually open the pool so that we can sync out the necessary labels. | |
1233 | * It's OK to call spa_open() with the namespace lock held because we | |
1234 | * allow recursive calls for other reasons. | |
1235 | */ | |
1236 | mutex_enter(&spa_namespace_lock); | |
1237 | if ((err = spa_open(name, &spa, FTAG)) != 0) { | |
1238 | mutex_exit(&spa_namespace_lock); | |
1239 | return (err); | |
1240 | } | |
1241 | ||
b128c09f | 1242 | spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); |
34dc7c2f BB |
1243 | |
1244 | avl_remove(&spa_namespace_avl, spa); | |
b128c09f | 1245 | (void) strlcpy(spa->spa_name, newname, sizeof (spa->spa_name)); |
34dc7c2f BB |
1246 | avl_add(&spa_namespace_avl, spa); |
1247 | ||
1248 | /* | |
1249 | * Sync all labels to disk with the new names by marking the root vdev | |
1250 | * dirty and waiting for it to sync. It will pick up the new pool name | |
1251 | * during the sync. | |
1252 | */ | |
1253 | vdev_config_dirty(spa->spa_root_vdev); | |
1254 | ||
b128c09f | 1255 | spa_config_exit(spa, SCL_ALL, FTAG); |
34dc7c2f BB |
1256 | |
1257 | txg_wait_synced(spa->spa_dsl_pool, 0); | |
1258 | ||
1259 | /* | |
1260 | * Sync the updated config cache. | |
1261 | */ | |
b128c09f | 1262 | spa_config_sync(spa, B_FALSE, B_TRUE); |
34dc7c2f BB |
1263 | |
1264 | spa_close(spa, FTAG); | |
1265 | ||
1266 | mutex_exit(&spa_namespace_lock); | |
1267 | ||
1268 | return (0); | |
1269 | } | |
1270 | ||
34dc7c2f | 1271 | /* |
572e2857 BB |
1272 | * Return the spa_t associated with given pool_guid, if it exists. If |
1273 | * device_guid is non-zero, determine whether the pool exists *and* contains | |
1274 | * a device with the specified device_guid. | |
34dc7c2f | 1275 | */ |
572e2857 BB |
1276 | spa_t * |
1277 | spa_by_guid(uint64_t pool_guid, uint64_t device_guid) | |
34dc7c2f BB |
1278 | { |
1279 | spa_t *spa; | |
1280 | avl_tree_t *t = &spa_namespace_avl; | |
1281 | ||
1282 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
1283 | ||
1284 | for (spa = avl_first(t); spa != NULL; spa = AVL_NEXT(t, spa)) { | |
1285 | if (spa->spa_state == POOL_STATE_UNINITIALIZED) | |
1286 | continue; | |
1287 | if (spa->spa_root_vdev == NULL) | |
1288 | continue; | |
1289 | if (spa_guid(spa) == pool_guid) { | |
1290 | if (device_guid == 0) | |
1291 | break; | |
1292 | ||
1293 | if (vdev_lookup_by_guid(spa->spa_root_vdev, | |
1294 | device_guid) != NULL) | |
1295 | break; | |
1296 | ||
1297 | /* | |
1298 | * Check any devices we may be in the process of adding. | |
1299 | */ | |
1300 | if (spa->spa_pending_vdev) { | |
1301 | if (vdev_lookup_by_guid(spa->spa_pending_vdev, | |
1302 | device_guid) != NULL) | |
1303 | break; | |
1304 | } | |
1305 | } | |
1306 | } | |
1307 | ||
572e2857 BB |
1308 | return (spa); |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | * Determine whether a pool with the given pool_guid exists. | |
1313 | */ | |
1314 | boolean_t | |
1315 | spa_guid_exists(uint64_t pool_guid, uint64_t device_guid) | |
1316 | { | |
1317 | return (spa_by_guid(pool_guid, device_guid) != NULL); | |
34dc7c2f BB |
1318 | } |
1319 | ||
1320 | char * | |
1321 | spa_strdup(const char *s) | |
1322 | { | |
1323 | size_t len; | |
1324 | char *new; | |
1325 | ||
1326 | len = strlen(s); | |
79c76d5b | 1327 | new = kmem_alloc(len + 1, KM_SLEEP); |
34dc7c2f BB |
1328 | bcopy(s, new, len); |
1329 | new[len] = '\0'; | |
1330 | ||
1331 | return (new); | |
1332 | } | |
1333 | ||
1334 | void | |
1335 | spa_strfree(char *s) | |
1336 | { | |
1337 | kmem_free(s, strlen(s) + 1); | |
1338 | } | |
1339 | ||
1340 | uint64_t | |
1341 | spa_get_random(uint64_t range) | |
1342 | { | |
1343 | uint64_t r; | |
1344 | ||
1345 | ASSERT(range != 0); | |
1346 | ||
1347 | (void) random_get_pseudo_bytes((void *)&r, sizeof (uint64_t)); | |
1348 | ||
1349 | return (r % range); | |
1350 | } | |
1351 | ||
428870ff BB |
1352 | uint64_t |
1353 | spa_generate_guid(spa_t *spa) | |
34dc7c2f | 1354 | { |
428870ff | 1355 | uint64_t guid = spa_get_random(-1ULL); |
34dc7c2f | 1356 | |
428870ff BB |
1357 | if (spa != NULL) { |
1358 | while (guid == 0 || spa_guid_exists(spa_guid(spa), guid)) | |
1359 | guid = spa_get_random(-1ULL); | |
1360 | } else { | |
1361 | while (guid == 0 || spa_guid_exists(guid, 0)) | |
1362 | guid = spa_get_random(-1ULL); | |
34dc7c2f BB |
1363 | } |
1364 | ||
428870ff BB |
1365 | return (guid); |
1366 | } | |
1367 | ||
1368 | void | |
b0bc7a84 | 1369 | snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp) |
428870ff | 1370 | { |
9ae529ec | 1371 | char type[256]; |
428870ff BB |
1372 | char *checksum = NULL; |
1373 | char *compress = NULL; | |
34dc7c2f | 1374 | |
428870ff | 1375 | if (bp != NULL) { |
9ae529ec CS |
1376 | if (BP_GET_TYPE(bp) & DMU_OT_NEWTYPE) { |
1377 | dmu_object_byteswap_t bswap = | |
1378 | DMU_OT_BYTESWAP(BP_GET_TYPE(bp)); | |
1379 | (void) snprintf(type, sizeof (type), "bswap %s %s", | |
1380 | DMU_OT_IS_METADATA(BP_GET_TYPE(bp)) ? | |
1381 | "metadata" : "data", | |
1382 | dmu_ot_byteswap[bswap].ob_name); | |
1383 | } else { | |
1384 | (void) strlcpy(type, dmu_ot[BP_GET_TYPE(bp)].ot_name, | |
1385 | sizeof (type)); | |
1386 | } | |
9b67f605 MA |
1387 | if (!BP_IS_EMBEDDED(bp)) { |
1388 | checksum = | |
1389 | zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name; | |
1390 | } | |
428870ff | 1391 | compress = zio_compress_table[BP_GET_COMPRESS(bp)].ci_name; |
34dc7c2f BB |
1392 | } |
1393 | ||
b0bc7a84 MG |
1394 | SNPRINTF_BLKPTR(snprintf, ' ', buf, buflen, bp, type, checksum, |
1395 | compress); | |
34dc7c2f BB |
1396 | } |
1397 | ||
1398 | void | |
1399 | spa_freeze(spa_t *spa) | |
1400 | { | |
1401 | uint64_t freeze_txg = 0; | |
1402 | ||
b128c09f | 1403 | spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); |
34dc7c2f BB |
1404 | if (spa->spa_freeze_txg == UINT64_MAX) { |
1405 | freeze_txg = spa_last_synced_txg(spa) + TXG_SIZE; | |
1406 | spa->spa_freeze_txg = freeze_txg; | |
1407 | } | |
b128c09f | 1408 | spa_config_exit(spa, SCL_ALL, FTAG); |
34dc7c2f BB |
1409 | if (freeze_txg != 0) |
1410 | txg_wait_synced(spa_get_dsl(spa), freeze_txg); | |
1411 | } | |
1412 | ||
0b39b9f9 PS |
1413 | void |
1414 | zfs_panic_recover(const char *fmt, ...) | |
1415 | { | |
1416 | va_list adx; | |
1417 | ||
1418 | va_start(adx, fmt); | |
1419 | vcmn_err(zfs_recover ? CE_WARN : CE_PANIC, fmt, adx); | |
1420 | va_end(adx); | |
1421 | } | |
1422 | ||
428870ff BB |
1423 | /* |
1424 | * This is a stripped-down version of strtoull, suitable only for converting | |
d3cc8b15 | 1425 | * lowercase hexadecimal numbers that don't overflow. |
428870ff BB |
1426 | */ |
1427 | uint64_t | |
1428 | strtonum(const char *str, char **nptr) | |
1429 | { | |
1430 | uint64_t val = 0; | |
1431 | char c; | |
1432 | int digit; | |
1433 | ||
1434 | while ((c = *str) != '\0') { | |
1435 | if (c >= '0' && c <= '9') | |
1436 | digit = c - '0'; | |
1437 | else if (c >= 'a' && c <= 'f') | |
1438 | digit = 10 + c - 'a'; | |
1439 | else | |
1440 | break; | |
1441 | ||
1442 | val *= 16; | |
1443 | val += digit; | |
1444 | ||
1445 | str++; | |
1446 | } | |
1447 | ||
1448 | if (nptr) | |
1449 | *nptr = (char *)str; | |
1450 | ||
1451 | return (val); | |
1452 | } | |
1453 | ||
34dc7c2f BB |
1454 | /* |
1455 | * ========================================================================== | |
1456 | * Accessor functions | |
1457 | * ========================================================================== | |
1458 | */ | |
1459 | ||
b128c09f BB |
1460 | boolean_t |
1461 | spa_shutting_down(spa_t *spa) | |
34dc7c2f | 1462 | { |
b128c09f | 1463 | return (spa->spa_async_suspended); |
34dc7c2f BB |
1464 | } |
1465 | ||
1466 | dsl_pool_t * | |
1467 | spa_get_dsl(spa_t *spa) | |
1468 | { | |
1469 | return (spa->spa_dsl_pool); | |
1470 | } | |
1471 | ||
9ae529ec CS |
1472 | boolean_t |
1473 | spa_is_initializing(spa_t *spa) | |
1474 | { | |
1475 | return (spa->spa_is_initializing); | |
1476 | } | |
1477 | ||
34dc7c2f BB |
1478 | blkptr_t * |
1479 | spa_get_rootblkptr(spa_t *spa) | |
1480 | { | |
1481 | return (&spa->spa_ubsync.ub_rootbp); | |
1482 | } | |
1483 | ||
1484 | void | |
1485 | spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp) | |
1486 | { | |
1487 | spa->spa_uberblock.ub_rootbp = *bp; | |
1488 | } | |
1489 | ||
1490 | void | |
1491 | spa_altroot(spa_t *spa, char *buf, size_t buflen) | |
1492 | { | |
1493 | if (spa->spa_root == NULL) | |
1494 | buf[0] = '\0'; | |
1495 | else | |
1496 | (void) strncpy(buf, spa->spa_root, buflen); | |
1497 | } | |
1498 | ||
1499 | int | |
1500 | spa_sync_pass(spa_t *spa) | |
1501 | { | |
1502 | return (spa->spa_sync_pass); | |
1503 | } | |
1504 | ||
1505 | char * | |
1506 | spa_name(spa_t *spa) | |
1507 | { | |
34dc7c2f BB |
1508 | return (spa->spa_name); |
1509 | } | |
1510 | ||
1511 | uint64_t | |
1512 | spa_guid(spa_t *spa) | |
1513 | { | |
3bc7e0fb GW |
1514 | dsl_pool_t *dp = spa_get_dsl(spa); |
1515 | uint64_t guid; | |
1516 | ||
34dc7c2f BB |
1517 | /* |
1518 | * If we fail to parse the config during spa_load(), we can go through | |
1519 | * the error path (which posts an ereport) and end up here with no root | |
3541dc6d | 1520 | * vdev. We stash the original pool guid in 'spa_config_guid' to handle |
34dc7c2f BB |
1521 | * this case. |
1522 | */ | |
3bc7e0fb GW |
1523 | if (spa->spa_root_vdev == NULL) |
1524 | return (spa->spa_config_guid); | |
1525 | ||
1526 | guid = spa->spa_last_synced_guid != 0 ? | |
1527 | spa->spa_last_synced_guid : spa->spa_root_vdev->vdev_guid; | |
1528 | ||
1529 | /* | |
1530 | * Return the most recently synced out guid unless we're | |
1531 | * in syncing context. | |
1532 | */ | |
1533 | if (dp && dsl_pool_sync_context(dp)) | |
34dc7c2f BB |
1534 | return (spa->spa_root_vdev->vdev_guid); |
1535 | else | |
3bc7e0fb | 1536 | return (guid); |
3541dc6d GA |
1537 | } |
1538 | ||
1539 | uint64_t | |
1540 | spa_load_guid(spa_t *spa) | |
1541 | { | |
1542 | /* | |
1543 | * This is a GUID that exists solely as a reference for the | |
1544 | * purposes of the arc. It is generated at load time, and | |
1545 | * is never written to persistent storage. | |
1546 | */ | |
1547 | return (spa->spa_load_guid); | |
34dc7c2f BB |
1548 | } |
1549 | ||
1550 | uint64_t | |
1551 | spa_last_synced_txg(spa_t *spa) | |
1552 | { | |
1553 | return (spa->spa_ubsync.ub_txg); | |
1554 | } | |
1555 | ||
1556 | uint64_t | |
1557 | spa_first_txg(spa_t *spa) | |
1558 | { | |
1559 | return (spa->spa_first_txg); | |
1560 | } | |
1561 | ||
428870ff BB |
1562 | uint64_t |
1563 | spa_syncing_txg(spa_t *spa) | |
1564 | { | |
1565 | return (spa->spa_syncing_txg); | |
1566 | } | |
1567 | ||
b128c09f | 1568 | pool_state_t |
34dc7c2f BB |
1569 | spa_state(spa_t *spa) |
1570 | { | |
1571 | return (spa->spa_state); | |
1572 | } | |
1573 | ||
428870ff BB |
1574 | spa_load_state_t |
1575 | spa_load_state(spa_t *spa) | |
34dc7c2f | 1576 | { |
428870ff | 1577 | return (spa->spa_load_state); |
34dc7c2f BB |
1578 | } |
1579 | ||
34dc7c2f | 1580 | uint64_t |
428870ff | 1581 | spa_freeze_txg(spa_t *spa) |
34dc7c2f | 1582 | { |
428870ff | 1583 | return (spa->spa_freeze_txg); |
34dc7c2f BB |
1584 | } |
1585 | ||
428870ff | 1586 | /* ARGSUSED */ |
34dc7c2f | 1587 | uint64_t |
428870ff | 1588 | spa_get_asize(spa_t *spa, uint64_t lsize) |
34dc7c2f | 1589 | { |
e8b96c60 | 1590 | return (lsize * spa_asize_inflation); |
34dc7c2f BB |
1591 | } |
1592 | ||
3d45fdd6 MA |
1593 | /* |
1594 | * Return the amount of slop space in bytes. It is 1/32 of the pool (3.2%), | |
1595 | * or at least 32MB. | |
1596 | * | |
1597 | * See the comment above spa_slop_shift for details. | |
1598 | */ | |
1599 | uint64_t | |
1600 | spa_get_slop_space(spa_t *spa) { | |
1601 | uint64_t space = spa_get_dspace(spa); | |
1602 | return (MAX(space >> spa_slop_shift, SPA_MINDEVSIZE >> 1)); | |
1603 | } | |
1604 | ||
34dc7c2f BB |
1605 | uint64_t |
1606 | spa_get_dspace(spa_t *spa) | |
1607 | { | |
428870ff | 1608 | return (spa->spa_dspace); |
34dc7c2f BB |
1609 | } |
1610 | ||
428870ff BB |
1611 | void |
1612 | spa_update_dspace(spa_t *spa) | |
34dc7c2f | 1613 | { |
428870ff BB |
1614 | spa->spa_dspace = metaslab_class_get_dspace(spa_normal_class(spa)) + |
1615 | ddt_get_dedup_dspace(spa); | |
34dc7c2f BB |
1616 | } |
1617 | ||
1618 | /* | |
1619 | * Return the failure mode that has been set to this pool. The default | |
1620 | * behavior will be to block all I/Os when a complete failure occurs. | |
1621 | */ | |
1622 | uint8_t | |
1623 | spa_get_failmode(spa_t *spa) | |
1624 | { | |
1625 | return (spa->spa_failmode); | |
1626 | } | |
1627 | ||
b128c09f BB |
1628 | boolean_t |
1629 | spa_suspended(spa_t *spa) | |
1630 | { | |
1631 | return (spa->spa_suspended); | |
1632 | } | |
1633 | ||
34dc7c2f BB |
1634 | uint64_t |
1635 | spa_version(spa_t *spa) | |
1636 | { | |
1637 | return (spa->spa_ubsync.ub_version); | |
1638 | } | |
1639 | ||
428870ff BB |
1640 | boolean_t |
1641 | spa_deflate(spa_t *spa) | |
1642 | { | |
1643 | return (spa->spa_deflate); | |
1644 | } | |
1645 | ||
1646 | metaslab_class_t * | |
1647 | spa_normal_class(spa_t *spa) | |
1648 | { | |
1649 | return (spa->spa_normal_class); | |
1650 | } | |
1651 | ||
1652 | metaslab_class_t * | |
1653 | spa_log_class(spa_t *spa) | |
1654 | { | |
1655 | return (spa->spa_log_class); | |
1656 | } | |
1657 | ||
0c66c32d JG |
1658 | void |
1659 | spa_evicting_os_register(spa_t *spa, objset_t *os) | |
1660 | { | |
1661 | mutex_enter(&spa->spa_evicting_os_lock); | |
1662 | list_insert_head(&spa->spa_evicting_os_list, os); | |
1663 | mutex_exit(&spa->spa_evicting_os_lock); | |
1664 | } | |
1665 | ||
1666 | void | |
1667 | spa_evicting_os_deregister(spa_t *spa, objset_t *os) | |
1668 | { | |
1669 | mutex_enter(&spa->spa_evicting_os_lock); | |
1670 | list_remove(&spa->spa_evicting_os_list, os); | |
1671 | cv_broadcast(&spa->spa_evicting_os_cv); | |
1672 | mutex_exit(&spa->spa_evicting_os_lock); | |
1673 | } | |
1674 | ||
1675 | void | |
1676 | spa_evicting_os_wait(spa_t *spa) | |
1677 | { | |
1678 | mutex_enter(&spa->spa_evicting_os_lock); | |
1679 | while (!list_is_empty(&spa->spa_evicting_os_list)) | |
1680 | cv_wait(&spa->spa_evicting_os_cv, &spa->spa_evicting_os_lock); | |
1681 | mutex_exit(&spa->spa_evicting_os_lock); | |
1682 | ||
1683 | dmu_buf_user_evict_wait(); | |
1684 | } | |
1685 | ||
34dc7c2f BB |
1686 | int |
1687 | spa_max_replication(spa_t *spa) | |
1688 | { | |
1689 | /* | |
1690 | * As of SPA_VERSION == SPA_VERSION_DITTO_BLOCKS, we are able to | |
1691 | * handle BPs with more than one DVA allocated. Set our max | |
1692 | * replication level accordingly. | |
1693 | */ | |
1694 | if (spa_version(spa) < SPA_VERSION_DITTO_BLOCKS) | |
1695 | return (1); | |
1696 | return (MIN(SPA_DVAS_PER_BP, spa_max_replication_override)); | |
1697 | } | |
1698 | ||
428870ff BB |
1699 | int |
1700 | spa_prev_software_version(spa_t *spa) | |
1701 | { | |
1702 | return (spa->spa_prev_software_version); | |
1703 | } | |
1704 | ||
cc92e9d0 GW |
1705 | uint64_t |
1706 | spa_deadman_synctime(spa_t *spa) | |
1707 | { | |
1708 | return (spa->spa_deadman_synctime); | |
1709 | } | |
1710 | ||
34dc7c2f | 1711 | uint64_t |
428870ff | 1712 | dva_get_dsize_sync(spa_t *spa, const dva_t *dva) |
34dc7c2f | 1713 | { |
428870ff BB |
1714 | uint64_t asize = DVA_GET_ASIZE(dva); |
1715 | uint64_t dsize = asize; | |
34dc7c2f | 1716 | |
428870ff | 1717 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); |
34dc7c2f | 1718 | |
428870ff BB |
1719 | if (asize != 0 && spa->spa_deflate) { |
1720 | vdev_t *vd = vdev_lookup_top(spa, DVA_GET_VDEV(dva)); | |
2c33b912 BB |
1721 | if (vd != NULL) |
1722 | dsize = (asize >> SPA_MINBLOCKSHIFT) * | |
1723 | vd->vdev_deflate_ratio; | |
34dc7c2f | 1724 | } |
428870ff BB |
1725 | |
1726 | return (dsize); | |
1727 | } | |
1728 | ||
1729 | uint64_t | |
1730 | bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp) | |
1731 | { | |
1732 | uint64_t dsize = 0; | |
d6320ddb | 1733 | int d; |
428870ff | 1734 | |
9b67f605 | 1735 | for (d = 0; d < BP_GET_NDVAS(bp); d++) |
428870ff BB |
1736 | dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]); |
1737 | ||
1738 | return (dsize); | |
1739 | } | |
1740 | ||
1741 | uint64_t | |
1742 | bp_get_dsize(spa_t *spa, const blkptr_t *bp) | |
1743 | { | |
1744 | uint64_t dsize = 0; | |
d6320ddb | 1745 | int d; |
428870ff BB |
1746 | |
1747 | spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER); | |
1748 | ||
9b67f605 | 1749 | for (d = 0; d < BP_GET_NDVAS(bp); d++) |
428870ff BB |
1750 | dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]); |
1751 | ||
b128c09f | 1752 | spa_config_exit(spa, SCL_VDEV, FTAG); |
428870ff BB |
1753 | |
1754 | return (dsize); | |
34dc7c2f BB |
1755 | } |
1756 | ||
1757 | /* | |
1758 | * ========================================================================== | |
1759 | * Initialization and Termination | |
1760 | * ========================================================================== | |
1761 | */ | |
1762 | ||
1763 | static int | |
1764 | spa_name_compare(const void *a1, const void *a2) | |
1765 | { | |
1766 | const spa_t *s1 = a1; | |
1767 | const spa_t *s2 = a2; | |
1768 | int s; | |
1769 | ||
1770 | s = strcmp(s1->spa_name, s2->spa_name); | |
1771 | if (s > 0) | |
1772 | return (1); | |
1773 | if (s < 0) | |
1774 | return (-1); | |
1775 | return (0); | |
1776 | } | |
1777 | ||
34dc7c2f | 1778 | void |
0bc8fd78 | 1779 | spa_boot_init(void) |
34dc7c2f BB |
1780 | { |
1781 | spa_config_load(); | |
1782 | } | |
1783 | ||
1784 | void | |
1785 | spa_init(int mode) | |
1786 | { | |
1787 | mutex_init(&spa_namespace_lock, NULL, MUTEX_DEFAULT, NULL); | |
1788 | mutex_init(&spa_spare_lock, NULL, MUTEX_DEFAULT, NULL); | |
1789 | mutex_init(&spa_l2cache_lock, NULL, MUTEX_DEFAULT, NULL); | |
1790 | cv_init(&spa_namespace_cv, NULL, CV_DEFAULT, NULL); | |
1791 | ||
1792 | avl_create(&spa_namespace_avl, spa_name_compare, sizeof (spa_t), | |
1793 | offsetof(spa_t, spa_avl)); | |
1794 | ||
1795 | avl_create(&spa_spare_avl, spa_spare_compare, sizeof (spa_aux_t), | |
1796 | offsetof(spa_aux_t, aux_avl)); | |
1797 | ||
1798 | avl_create(&spa_l2cache_avl, spa_l2cache_compare, sizeof (spa_aux_t), | |
1799 | offsetof(spa_aux_t, aux_avl)); | |
1800 | ||
fb5f0bc8 | 1801 | spa_mode_global = mode; |
34dc7c2f | 1802 | |
498877ba MA |
1803 | #ifndef _KERNEL |
1804 | if (spa_mode_global != FREAD && dprintf_find_string("watch")) { | |
1805 | struct sigaction sa; | |
1806 | ||
1807 | sa.sa_flags = SA_SIGINFO; | |
1808 | sigemptyset(&sa.sa_mask); | |
1809 | sa.sa_sigaction = arc_buf_sigsegv; | |
1810 | ||
1811 | if (sigaction(SIGSEGV, &sa, NULL) == -1) { | |
1812 | perror("could not enable watchpoints: " | |
1813 | "sigaction(SIGSEGV, ...) = "); | |
1814 | } else { | |
1815 | arc_watch = B_TRUE; | |
1816 | } | |
1817 | } | |
1818 | #endif | |
1819 | ||
26685276 | 1820 | fm_init(); |
34dc7c2f BB |
1821 | refcount_init(); |
1822 | unique_init(); | |
93cf2076 | 1823 | range_tree_init(); |
ecf3d9b8 | 1824 | ddt_init(); |
34dc7c2f BB |
1825 | zio_init(); |
1826 | dmu_init(); | |
1827 | zil_init(); | |
1828 | vdev_cache_stat_init(); | |
bc25c932 | 1829 | vdev_file_init(); |
34dc7c2f BB |
1830 | zfs_prop_init(); |
1831 | zpool_prop_init(); | |
9ae529ec | 1832 | zpool_feature_init(); |
34dc7c2f | 1833 | spa_config_load(); |
b128c09f | 1834 | l2arc_start(); |
34dc7c2f BB |
1835 | } |
1836 | ||
1837 | void | |
1838 | spa_fini(void) | |
1839 | { | |
b128c09f BB |
1840 | l2arc_stop(); |
1841 | ||
34dc7c2f BB |
1842 | spa_evict_all(); |
1843 | ||
bc25c932 | 1844 | vdev_file_fini(); |
34dc7c2f BB |
1845 | vdev_cache_stat_fini(); |
1846 | zil_fini(); | |
1847 | dmu_fini(); | |
1848 | zio_fini(); | |
ecf3d9b8 | 1849 | ddt_fini(); |
93cf2076 | 1850 | range_tree_fini(); |
34dc7c2f BB |
1851 | unique_fini(); |
1852 | refcount_fini(); | |
26685276 | 1853 | fm_fini(); |
34dc7c2f BB |
1854 | |
1855 | avl_destroy(&spa_namespace_avl); | |
1856 | avl_destroy(&spa_spare_avl); | |
1857 | avl_destroy(&spa_l2cache_avl); | |
1858 | ||
1859 | cv_destroy(&spa_namespace_cv); | |
1860 | mutex_destroy(&spa_namespace_lock); | |
1861 | mutex_destroy(&spa_spare_lock); | |
1862 | mutex_destroy(&spa_l2cache_lock); | |
1863 | } | |
1864 | ||
1865 | /* | |
1866 | * Return whether this pool has slogs. No locking needed. | |
1867 | * It's not a problem if the wrong answer is returned as it's only for | |
1868 | * performance and not correctness | |
1869 | */ | |
1870 | boolean_t | |
1871 | spa_has_slogs(spa_t *spa) | |
1872 | { | |
1873 | return (spa->spa_log_class->mc_rotor != NULL); | |
1874 | } | |
b128c09f | 1875 | |
428870ff BB |
1876 | spa_log_state_t |
1877 | spa_get_log_state(spa_t *spa) | |
1878 | { | |
1879 | return (spa->spa_log_state); | |
1880 | } | |
1881 | ||
1882 | void | |
1883 | spa_set_log_state(spa_t *spa, spa_log_state_t state) | |
1884 | { | |
1885 | spa->spa_log_state = state; | |
1886 | } | |
1887 | ||
b128c09f BB |
1888 | boolean_t |
1889 | spa_is_root(spa_t *spa) | |
1890 | { | |
1891 | return (spa->spa_is_root); | |
1892 | } | |
fb5f0bc8 BB |
1893 | |
1894 | boolean_t | |
1895 | spa_writeable(spa_t *spa) | |
1896 | { | |
1897 | return (!!(spa->spa_mode & FWRITE)); | |
1898 | } | |
1899 | ||
acbad6ff AR |
1900 | /* |
1901 | * Returns true if there is a pending sync task in any of the current | |
1902 | * syncing txg, the current quiescing txg, or the current open txg. | |
1903 | */ | |
1904 | boolean_t | |
1905 | spa_has_pending_synctask(spa_t *spa) | |
1906 | { | |
1907 | return (!txg_all_lists_empty(&spa->spa_dsl_pool->dp_sync_tasks)); | |
1908 | } | |
1909 | ||
fb5f0bc8 BB |
1910 | int |
1911 | spa_mode(spa_t *spa) | |
1912 | { | |
1913 | return (spa->spa_mode); | |
1914 | } | |
428870ff BB |
1915 | |
1916 | uint64_t | |
1917 | spa_bootfs(spa_t *spa) | |
1918 | { | |
1919 | return (spa->spa_bootfs); | |
1920 | } | |
1921 | ||
1922 | uint64_t | |
1923 | spa_delegation(spa_t *spa) | |
1924 | { | |
1925 | return (spa->spa_delegation); | |
1926 | } | |
1927 | ||
1928 | objset_t * | |
1929 | spa_meta_objset(spa_t *spa) | |
1930 | { | |
1931 | return (spa->spa_meta_objset); | |
1932 | } | |
1933 | ||
1934 | enum zio_checksum | |
1935 | spa_dedup_checksum(spa_t *spa) | |
1936 | { | |
1937 | return (spa->spa_dedup_checksum); | |
1938 | } | |
1939 | ||
1940 | /* | |
1941 | * Reset pool scan stat per scan pass (or reboot). | |
1942 | */ | |
1943 | void | |
1944 | spa_scan_stat_init(spa_t *spa) | |
1945 | { | |
1946 | /* data not stored on disk */ | |
1947 | spa->spa_scan_pass_start = gethrestime_sec(); | |
1948 | spa->spa_scan_pass_exam = 0; | |
1949 | vdev_scan_stat_init(spa->spa_root_vdev); | |
1950 | } | |
1951 | ||
1952 | /* | |
1953 | * Get scan stats for zpool status reports | |
1954 | */ | |
1955 | int | |
1956 | spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps) | |
1957 | { | |
1958 | dsl_scan_t *scn = spa->spa_dsl_pool ? spa->spa_dsl_pool->dp_scan : NULL; | |
1959 | ||
1960 | if (scn == NULL || scn->scn_phys.scn_func == POOL_SCAN_NONE) | |
2e528b49 | 1961 | return (SET_ERROR(ENOENT)); |
428870ff BB |
1962 | bzero(ps, sizeof (pool_scan_stat_t)); |
1963 | ||
1964 | /* data stored on disk */ | |
1965 | ps->pss_func = scn->scn_phys.scn_func; | |
1966 | ps->pss_start_time = scn->scn_phys.scn_start_time; | |
1967 | ps->pss_end_time = scn->scn_phys.scn_end_time; | |
1968 | ps->pss_to_examine = scn->scn_phys.scn_to_examine; | |
1969 | ps->pss_examined = scn->scn_phys.scn_examined; | |
1970 | ps->pss_to_process = scn->scn_phys.scn_to_process; | |
1971 | ps->pss_processed = scn->scn_phys.scn_processed; | |
1972 | ps->pss_errors = scn->scn_phys.scn_errors; | |
1973 | ps->pss_state = scn->scn_phys.scn_state; | |
1974 | ||
1975 | /* data not stored on disk */ | |
1976 | ps->pss_pass_start = spa->spa_scan_pass_start; | |
1977 | ps->pss_pass_exam = spa->spa_scan_pass_exam; | |
1978 | ||
1979 | return (0); | |
1980 | } | |
c28b2279 | 1981 | |
6d974228 GW |
1982 | boolean_t |
1983 | spa_debug_enabled(spa_t *spa) | |
1984 | { | |
1985 | return (spa->spa_debug); | |
1986 | } | |
1987 | ||
c28b2279 BB |
1988 | #if defined(_KERNEL) && defined(HAVE_SPL) |
1989 | /* Namespace manipulation */ | |
1990 | EXPORT_SYMBOL(spa_lookup); | |
1991 | EXPORT_SYMBOL(spa_add); | |
1992 | EXPORT_SYMBOL(spa_remove); | |
1993 | EXPORT_SYMBOL(spa_next); | |
1994 | ||
1995 | /* Refcount functions */ | |
1996 | EXPORT_SYMBOL(spa_open_ref); | |
1997 | EXPORT_SYMBOL(spa_close); | |
1998 | EXPORT_SYMBOL(spa_refcount_zero); | |
1999 | ||
2000 | /* Pool configuration lock */ | |
2001 | EXPORT_SYMBOL(spa_config_tryenter); | |
2002 | EXPORT_SYMBOL(spa_config_enter); | |
2003 | EXPORT_SYMBOL(spa_config_exit); | |
2004 | EXPORT_SYMBOL(spa_config_held); | |
2005 | ||
2006 | /* Pool vdev add/remove lock */ | |
2007 | EXPORT_SYMBOL(spa_vdev_enter); | |
2008 | EXPORT_SYMBOL(spa_vdev_exit); | |
2009 | ||
2010 | /* Pool vdev state change lock */ | |
2011 | EXPORT_SYMBOL(spa_vdev_state_enter); | |
2012 | EXPORT_SYMBOL(spa_vdev_state_exit); | |
2013 | ||
2014 | /* Accessor functions */ | |
2015 | EXPORT_SYMBOL(spa_shutting_down); | |
2016 | EXPORT_SYMBOL(spa_get_dsl); | |
2017 | EXPORT_SYMBOL(spa_get_rootblkptr); | |
2018 | EXPORT_SYMBOL(spa_set_rootblkptr); | |
2019 | EXPORT_SYMBOL(spa_altroot); | |
2020 | EXPORT_SYMBOL(spa_sync_pass); | |
2021 | EXPORT_SYMBOL(spa_name); | |
2022 | EXPORT_SYMBOL(spa_guid); | |
2023 | EXPORT_SYMBOL(spa_last_synced_txg); | |
2024 | EXPORT_SYMBOL(spa_first_txg); | |
2025 | EXPORT_SYMBOL(spa_syncing_txg); | |
2026 | EXPORT_SYMBOL(spa_version); | |
2027 | EXPORT_SYMBOL(spa_state); | |
2028 | EXPORT_SYMBOL(spa_load_state); | |
2029 | EXPORT_SYMBOL(spa_freeze_txg); | |
2030 | EXPORT_SYMBOL(spa_get_asize); | |
2031 | EXPORT_SYMBOL(spa_get_dspace); | |
2032 | EXPORT_SYMBOL(spa_update_dspace); | |
2033 | EXPORT_SYMBOL(spa_deflate); | |
2034 | EXPORT_SYMBOL(spa_normal_class); | |
2035 | EXPORT_SYMBOL(spa_log_class); | |
2036 | EXPORT_SYMBOL(spa_max_replication); | |
2037 | EXPORT_SYMBOL(spa_prev_software_version); | |
2038 | EXPORT_SYMBOL(spa_get_failmode); | |
2039 | EXPORT_SYMBOL(spa_suspended); | |
2040 | EXPORT_SYMBOL(spa_bootfs); | |
2041 | EXPORT_SYMBOL(spa_delegation); | |
2042 | EXPORT_SYMBOL(spa_meta_objset); | |
2043 | ||
2044 | /* Miscellaneous support routines */ | |
2045 | EXPORT_SYMBOL(spa_rename); | |
2046 | EXPORT_SYMBOL(spa_guid_exists); | |
2047 | EXPORT_SYMBOL(spa_strdup); | |
2048 | EXPORT_SYMBOL(spa_strfree); | |
2049 | EXPORT_SYMBOL(spa_get_random); | |
2050 | EXPORT_SYMBOL(spa_generate_guid); | |
b0bc7a84 | 2051 | EXPORT_SYMBOL(snprintf_blkptr); |
c28b2279 BB |
2052 | EXPORT_SYMBOL(spa_freeze); |
2053 | EXPORT_SYMBOL(spa_upgrade); | |
2054 | EXPORT_SYMBOL(spa_evict_all); | |
2055 | EXPORT_SYMBOL(spa_lookup_by_guid); | |
2056 | EXPORT_SYMBOL(spa_has_spare); | |
2057 | EXPORT_SYMBOL(dva_get_dsize_sync); | |
2058 | EXPORT_SYMBOL(bp_get_dsize_sync); | |
2059 | EXPORT_SYMBOL(bp_get_dsize); | |
2060 | EXPORT_SYMBOL(spa_has_slogs); | |
2061 | EXPORT_SYMBOL(spa_is_root); | |
2062 | EXPORT_SYMBOL(spa_writeable); | |
2063 | EXPORT_SYMBOL(spa_mode); | |
2064 | ||
2065 | EXPORT_SYMBOL(spa_namespace_lock); | |
cc92e9d0 | 2066 | |
33b6dbbc | 2067 | module_param(zfs_flags, uint, 0644); |
0b39b9f9 PS |
2068 | MODULE_PARM_DESC(zfs_flags, "Set additional debugging flags"); |
2069 | ||
2070 | module_param(zfs_recover, int, 0644); | |
2071 | MODULE_PARM_DESC(zfs_recover, "Set to attempt to recover from fatal errors"); | |
2072 | ||
2073 | module_param(zfs_free_leak_on_eio, int, 0644); | |
2074 | MODULE_PARM_DESC(zfs_free_leak_on_eio, | |
2075 | "Set to ignore IO errors during free and permanently leak the space"); | |
2076 | ||
e8b96c60 | 2077 | module_param(zfs_deadman_synctime_ms, ulong, 0644); |
d1d7e268 | 2078 | MODULE_PARM_DESC(zfs_deadman_synctime_ms, "Expiration time in milliseconds"); |
cc92e9d0 GW |
2079 | |
2080 | module_param(zfs_deadman_enabled, int, 0644); | |
2081 | MODULE_PARM_DESC(zfs_deadman_enabled, "Enable deadman timer"); | |
e8b96c60 MA |
2082 | |
2083 | module_param(spa_asize_inflation, int, 0644); | |
2084 | MODULE_PARM_DESC(spa_asize_inflation, | |
d1d7e268 | 2085 | "SPA size estimate multiplication factor"); |
c28b2279 | 2086 | #endif |