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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. |
34dc7c2f BB |
23 | */ |
24 | ||
34dc7c2f BB |
25 | #include <sys/zfs_context.h> |
26 | #include <sys/spa_impl.h> | |
27 | #include <sys/zio.h> | |
28 | #include <sys/zio_checksum.h> | |
29 | #include <sys/zio_compress.h> | |
30 | #include <sys/dmu.h> | |
31 | #include <sys/dmu_tx.h> | |
32 | #include <sys/zap.h> | |
33 | #include <sys/zil.h> | |
34 | #include <sys/vdev_impl.h> | |
35 | #include <sys/metaslab.h> | |
36 | #include <sys/uberblock_impl.h> | |
37 | #include <sys/txg.h> | |
38 | #include <sys/avl.h> | |
39 | #include <sys/unique.h> | |
40 | #include <sys/dsl_pool.h> | |
41 | #include <sys/dsl_dir.h> | |
42 | #include <sys/dsl_prop.h> | |
428870ff | 43 | #include <sys/dsl_scan.h> |
34dc7c2f BB |
44 | #include <sys/fs/zfs.h> |
45 | #include <sys/metaslab_impl.h> | |
b128c09f | 46 | #include <sys/arc.h> |
428870ff | 47 | #include <sys/ddt.h> |
34dc7c2f BB |
48 | #include "zfs_prop.h" |
49 | ||
50 | /* | |
51 | * SPA locking | |
52 | * | |
53 | * There are four basic locks for managing spa_t structures: | |
54 | * | |
55 | * spa_namespace_lock (global mutex) | |
56 | * | |
57 | * This lock must be acquired to do any of the following: | |
58 | * | |
59 | * - Lookup a spa_t by name | |
60 | * - Add or remove a spa_t from the namespace | |
61 | * - Increase spa_refcount from non-zero | |
62 | * - Check if spa_refcount is zero | |
63 | * - Rename a spa_t | |
64 | * - add/remove/attach/detach devices | |
65 | * - Held for the duration of create/destroy/import/export | |
66 | * | |
67 | * It does not need to handle recursion. A create or destroy may | |
68 | * reference objects (files or zvols) in other pools, but by | |
69 | * definition they must have an existing reference, and will never need | |
70 | * to lookup a spa_t by name. | |
71 | * | |
72 | * spa_refcount (per-spa refcount_t protected by mutex) | |
73 | * | |
74 | * This reference count keep track of any active users of the spa_t. The | |
75 | * spa_t cannot be destroyed or freed while this is non-zero. Internally, | |
76 | * the refcount is never really 'zero' - opening a pool implicitly keeps | |
b128c09f | 77 | * some references in the DMU. Internally we check against spa_minref, but |
34dc7c2f BB |
78 | * present the image of a zero/non-zero value to consumers. |
79 | * | |
b128c09f | 80 | * spa_config_lock[] (per-spa array of rwlocks) |
34dc7c2f BB |
81 | * |
82 | * This protects the spa_t from config changes, and must be held in | |
83 | * the following circumstances: | |
84 | * | |
85 | * - RW_READER to perform I/O to the spa | |
86 | * - RW_WRITER to change the vdev config | |
87 | * | |
34dc7c2f BB |
88 | * The locking order is fairly straightforward: |
89 | * | |
90 | * spa_namespace_lock -> spa_refcount | |
91 | * | |
92 | * The namespace lock must be acquired to increase the refcount from 0 | |
93 | * or to check if it is zero. | |
94 | * | |
b128c09f | 95 | * spa_refcount -> spa_config_lock[] |
34dc7c2f BB |
96 | * |
97 | * There must be at least one valid reference on the spa_t to acquire | |
98 | * the config lock. | |
99 | * | |
b128c09f | 100 | * spa_namespace_lock -> spa_config_lock[] |
34dc7c2f BB |
101 | * |
102 | * The namespace lock must always be taken before the config lock. | |
103 | * | |
104 | * | |
b128c09f | 105 | * The spa_namespace_lock can be acquired directly and is globally visible. |
34dc7c2f | 106 | * |
b128c09f BB |
107 | * The namespace is manipulated using the following functions, all of which |
108 | * require the spa_namespace_lock to be held. | |
34dc7c2f BB |
109 | * |
110 | * spa_lookup() Lookup a spa_t by name. | |
111 | * | |
112 | * spa_add() Create a new spa_t in the namespace. | |
113 | * | |
114 | * spa_remove() Remove a spa_t from the namespace. This also | |
115 | * frees up any memory associated with the spa_t. | |
116 | * | |
117 | * spa_next() Returns the next spa_t in the system, or the | |
118 | * first if NULL is passed. | |
119 | * | |
120 | * spa_evict_all() Shutdown and remove all spa_t structures in | |
121 | * the system. | |
122 | * | |
123 | * spa_guid_exists() Determine whether a pool/device guid exists. | |
124 | * | |
125 | * The spa_refcount is manipulated using the following functions: | |
126 | * | |
127 | * spa_open_ref() Adds a reference to the given spa_t. Must be | |
128 | * called with spa_namespace_lock held if the | |
129 | * refcount is currently zero. | |
130 | * | |
131 | * spa_close() Remove a reference from the spa_t. This will | |
132 | * not free the spa_t or remove it from the | |
133 | * namespace. No locking is required. | |
134 | * | |
135 | * spa_refcount_zero() Returns true if the refcount is currently | |
136 | * zero. Must be called with spa_namespace_lock | |
137 | * held. | |
138 | * | |
b128c09f BB |
139 | * The spa_config_lock[] is an array of rwlocks, ordered as follows: |
140 | * SCL_CONFIG > SCL_STATE > SCL_ALLOC > SCL_ZIO > SCL_FREE > SCL_VDEV. | |
141 | * spa_config_lock[] is manipulated with spa_config_{enter,exit,held}(). | |
142 | * | |
143 | * To read the configuration, it suffices to hold one of these locks as reader. | |
144 | * To modify the configuration, you must hold all locks as writer. To modify | |
145 | * vdev state without altering the vdev tree's topology (e.g. online/offline), | |
146 | * you must hold SCL_STATE and SCL_ZIO as writer. | |
147 | * | |
148 | * We use these distinct config locks to avoid recursive lock entry. | |
149 | * For example, spa_sync() (which holds SCL_CONFIG as reader) induces | |
150 | * block allocations (SCL_ALLOC), which may require reading space maps | |
151 | * from disk (dmu_read() -> zio_read() -> SCL_ZIO). | |
152 | * | |
153 | * The spa config locks cannot be normal rwlocks because we need the | |
154 | * ability to hand off ownership. For example, SCL_ZIO is acquired | |
155 | * by the issuing thread and later released by an interrupt thread. | |
156 | * They do, however, obey the usual write-wanted semantics to prevent | |
157 | * writer (i.e. system administrator) starvation. | |
158 | * | |
159 | * The lock acquisition rules are as follows: | |
160 | * | |
161 | * SCL_CONFIG | |
162 | * Protects changes to the vdev tree topology, such as vdev | |
163 | * add/remove/attach/detach. Protects the dirty config list | |
164 | * (spa_config_dirty_list) and the set of spares and l2arc devices. | |
165 | * | |
166 | * SCL_STATE | |
167 | * Protects changes to pool state and vdev state, such as vdev | |
168 | * online/offline/fault/degrade/clear. Protects the dirty state list | |
169 | * (spa_state_dirty_list) and global pool state (spa_state). | |
170 | * | |
171 | * SCL_ALLOC | |
172 | * Protects changes to metaslab groups and classes. | |
173 | * Held as reader by metaslab_alloc() and metaslab_claim(). | |
174 | * | |
175 | * SCL_ZIO | |
176 | * Held by bp-level zios (those which have no io_vd upon entry) | |
177 | * to prevent changes to the vdev tree. The bp-level zio implicitly | |
178 | * protects all of its vdev child zios, which do not hold SCL_ZIO. | |
179 | * | |
180 | * SCL_FREE | |
181 | * Protects changes to metaslab groups and classes. | |
182 | * Held as reader by metaslab_free(). SCL_FREE is distinct from | |
183 | * SCL_ALLOC, and lower than SCL_ZIO, so that we can safely free | |
184 | * blocks in zio_done() while another i/o that holds either | |
185 | * SCL_ALLOC or SCL_ZIO is waiting for this i/o to complete. | |
186 | * | |
187 | * SCL_VDEV | |
188 | * Held as reader to prevent changes to the vdev tree during trivial | |
428870ff | 189 | * inquiries such as bp_get_dsize(). SCL_VDEV is distinct from the |
b128c09f BB |
190 | * other locks, and lower than all of them, to ensure that it's safe |
191 | * to acquire regardless of caller context. | |
192 | * | |
193 | * In addition, the following rules apply: | |
194 | * | |
195 | * (a) spa_props_lock protects pool properties, spa_config and spa_config_list. | |
196 | * The lock ordering is SCL_CONFIG > spa_props_lock. | |
197 | * | |
198 | * (b) I/O operations on leaf vdevs. For any zio operation that takes | |
199 | * an explicit vdev_t argument -- such as zio_ioctl(), zio_read_phys(), | |
200 | * or zio_write_phys() -- the caller must ensure that the config cannot | |
201 | * cannot change in the interim, and that the vdev cannot be reopened. | |
202 | * SCL_STATE as reader suffices for both. | |
34dc7c2f BB |
203 | * |
204 | * The vdev configuration is protected by spa_vdev_enter() / spa_vdev_exit(). | |
205 | * | |
206 | * spa_vdev_enter() Acquire the namespace lock and the config lock | |
207 | * for writing. | |
208 | * | |
209 | * spa_vdev_exit() Release the config lock, wait for all I/O | |
210 | * to complete, sync the updated configs to the | |
211 | * cache, and release the namespace lock. | |
212 | * | |
b128c09f BB |
213 | * vdev state is protected by spa_vdev_state_enter() / spa_vdev_state_exit(). |
214 | * Like spa_vdev_enter/exit, these are convenience wrappers -- the actual | |
215 | * locking is, always, based on spa_namespace_lock and spa_config_lock[]. | |
216 | * | |
217 | * spa_rename() is also implemented within this file since is requires | |
218 | * manipulation of the namespace. | |
34dc7c2f BB |
219 | */ |
220 | ||
221 | static avl_tree_t spa_namespace_avl; | |
222 | kmutex_t spa_namespace_lock; | |
223 | static kcondvar_t spa_namespace_cv; | |
224 | static int spa_active_count; | |
225 | int spa_max_replication_override = SPA_DVAS_PER_BP; | |
226 | ||
227 | static kmutex_t spa_spare_lock; | |
228 | static avl_tree_t spa_spare_avl; | |
229 | static kmutex_t spa_l2cache_lock; | |
230 | static avl_tree_t spa_l2cache_avl; | |
231 | ||
232 | kmem_cache_t *spa_buffer_pool; | |
fb5f0bc8 | 233 | int spa_mode_global; |
34dc7c2f BB |
234 | |
235 | #ifdef ZFS_DEBUG | |
236 | /* Everything except dprintf is on by default in debug builds */ | |
237 | int zfs_flags = ~ZFS_DEBUG_DPRINTF; | |
238 | #else | |
239 | int zfs_flags = 0; | |
240 | #endif | |
241 | ||
242 | /* | |
243 | * zfs_recover can be set to nonzero to attempt to recover from | |
244 | * otherwise-fatal errors, typically caused by on-disk corruption. When | |
245 | * set, calls to zfs_panic_recover() will turn into warning messages. | |
246 | */ | |
247 | int zfs_recover = 0; | |
248 | ||
34dc7c2f BB |
249 | |
250 | /* | |
251 | * ========================================================================== | |
252 | * SPA config locking | |
253 | * ========================================================================== | |
254 | */ | |
255 | static void | |
b128c09f BB |
256 | spa_config_lock_init(spa_t *spa) |
257 | { | |
258 | for (int i = 0; i < SCL_LOCKS; i++) { | |
259 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; | |
260 | mutex_init(&scl->scl_lock, NULL, MUTEX_DEFAULT, NULL); | |
261 | cv_init(&scl->scl_cv, NULL, CV_DEFAULT, NULL); | |
262 | refcount_create(&scl->scl_count); | |
263 | scl->scl_writer = NULL; | |
264 | scl->scl_write_wanted = 0; | |
265 | } | |
34dc7c2f BB |
266 | } |
267 | ||
268 | static void | |
b128c09f BB |
269 | spa_config_lock_destroy(spa_t *spa) |
270 | { | |
271 | for (int i = 0; i < SCL_LOCKS; i++) { | |
272 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; | |
273 | mutex_destroy(&scl->scl_lock); | |
274 | cv_destroy(&scl->scl_cv); | |
275 | refcount_destroy(&scl->scl_count); | |
276 | ASSERT(scl->scl_writer == NULL); | |
277 | ASSERT(scl->scl_write_wanted == 0); | |
278 | } | |
279 | } | |
280 | ||
281 | int | |
282 | spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw) | |
34dc7c2f | 283 | { |
b128c09f BB |
284 | for (int i = 0; i < SCL_LOCKS; i++) { |
285 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; | |
286 | if (!(locks & (1 << i))) | |
287 | continue; | |
288 | mutex_enter(&scl->scl_lock); | |
289 | if (rw == RW_READER) { | |
290 | if (scl->scl_writer || scl->scl_write_wanted) { | |
291 | mutex_exit(&scl->scl_lock); | |
292 | spa_config_exit(spa, locks ^ (1 << i), tag); | |
293 | return (0); | |
294 | } | |
295 | } else { | |
296 | ASSERT(scl->scl_writer != curthread); | |
297 | if (!refcount_is_zero(&scl->scl_count)) { | |
298 | mutex_exit(&scl->scl_lock); | |
299 | spa_config_exit(spa, locks ^ (1 << i), tag); | |
300 | return (0); | |
301 | } | |
302 | scl->scl_writer = curthread; | |
303 | } | |
304 | (void) refcount_add(&scl->scl_count, tag); | |
305 | mutex_exit(&scl->scl_lock); | |
306 | } | |
307 | return (1); | |
34dc7c2f BB |
308 | } |
309 | ||
310 | void | |
b128c09f | 311 | spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw) |
34dc7c2f | 312 | { |
45d1cae3 BB |
313 | int wlocks_held = 0; |
314 | ||
b128c09f BB |
315 | for (int i = 0; i < SCL_LOCKS; i++) { |
316 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; | |
45d1cae3 BB |
317 | if (scl->scl_writer == curthread) |
318 | wlocks_held |= (1 << i); | |
b128c09f BB |
319 | if (!(locks & (1 << i))) |
320 | continue; | |
321 | mutex_enter(&scl->scl_lock); | |
322 | if (rw == RW_READER) { | |
323 | while (scl->scl_writer || scl->scl_write_wanted) { | |
324 | cv_wait(&scl->scl_cv, &scl->scl_lock); | |
325 | } | |
326 | } else { | |
327 | ASSERT(scl->scl_writer != curthread); | |
328 | while (!refcount_is_zero(&scl->scl_count)) { | |
329 | scl->scl_write_wanted++; | |
330 | cv_wait(&scl->scl_cv, &scl->scl_lock); | |
331 | scl->scl_write_wanted--; | |
332 | } | |
333 | scl->scl_writer = curthread; | |
334 | } | |
335 | (void) refcount_add(&scl->scl_count, tag); | |
336 | mutex_exit(&scl->scl_lock); | |
34dc7c2f | 337 | } |
45d1cae3 | 338 | ASSERT(wlocks_held <= locks); |
34dc7c2f BB |
339 | } |
340 | ||
341 | void | |
b128c09f | 342 | spa_config_exit(spa_t *spa, int locks, void *tag) |
34dc7c2f | 343 | { |
b128c09f BB |
344 | for (int i = SCL_LOCKS - 1; i >= 0; i--) { |
345 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; | |
346 | if (!(locks & (1 << i))) | |
347 | continue; | |
348 | mutex_enter(&scl->scl_lock); | |
349 | ASSERT(!refcount_is_zero(&scl->scl_count)); | |
350 | if (refcount_remove(&scl->scl_count, tag) == 0) { | |
351 | ASSERT(scl->scl_writer == NULL || | |
352 | scl->scl_writer == curthread); | |
353 | scl->scl_writer = NULL; /* OK in either case */ | |
354 | cv_broadcast(&scl->scl_cv); | |
355 | } | |
356 | mutex_exit(&scl->scl_lock); | |
34dc7c2f | 357 | } |
34dc7c2f BB |
358 | } |
359 | ||
b128c09f BB |
360 | int |
361 | spa_config_held(spa_t *spa, int locks, krw_t rw) | |
34dc7c2f | 362 | { |
b128c09f | 363 | int locks_held = 0; |
34dc7c2f | 364 | |
b128c09f BB |
365 | for (int i = 0; i < SCL_LOCKS; i++) { |
366 | spa_config_lock_t *scl = &spa->spa_config_lock[i]; | |
367 | if (!(locks & (1 << i))) | |
368 | continue; | |
369 | if ((rw == RW_READER && !refcount_is_zero(&scl->scl_count)) || | |
370 | (rw == RW_WRITER && scl->scl_writer == curthread)) | |
371 | locks_held |= 1 << i; | |
372 | } | |
373 | ||
374 | return (locks_held); | |
34dc7c2f BB |
375 | } |
376 | ||
377 | /* | |
378 | * ========================================================================== | |
379 | * SPA namespace functions | |
380 | * ========================================================================== | |
381 | */ | |
382 | ||
383 | /* | |
384 | * Lookup the named spa_t in the AVL tree. The spa_namespace_lock must be held. | |
385 | * Returns NULL if no matching spa_t is found. | |
386 | */ | |
387 | spa_t * | |
388 | spa_lookup(const char *name) | |
389 | { | |
b128c09f BB |
390 | static spa_t search; /* spa_t is large; don't allocate on stack */ |
391 | spa_t *spa; | |
34dc7c2f BB |
392 | avl_index_t where; |
393 | char c; | |
394 | char *cp; | |
395 | ||
396 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
397 | ||
398 | /* | |
399 | * If it's a full dataset name, figure out the pool name and | |
400 | * just use that. | |
401 | */ | |
402 | cp = strpbrk(name, "/@"); | |
403 | if (cp) { | |
404 | c = *cp; | |
405 | *cp = '\0'; | |
406 | } | |
407 | ||
b128c09f | 408 | (void) strlcpy(search.spa_name, name, sizeof (search.spa_name)); |
34dc7c2f BB |
409 | spa = avl_find(&spa_namespace_avl, &search, &where); |
410 | ||
411 | if (cp) | |
412 | *cp = c; | |
413 | ||
414 | return (spa); | |
415 | } | |
416 | ||
417 | /* | |
418 | * Create an uninitialized spa_t with the given name. Requires | |
419 | * spa_namespace_lock. The caller must ensure that the spa_t doesn't already | |
420 | * exist by calling spa_lookup() first. | |
421 | */ | |
422 | spa_t * | |
428870ff | 423 | spa_add(const char *name, nvlist_t *config, const char *altroot) |
34dc7c2f BB |
424 | { |
425 | spa_t *spa; | |
b128c09f | 426 | spa_config_dirent_t *dp; |
34dc7c2f BB |
427 | |
428 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
429 | ||
430 | spa = kmem_zalloc(sizeof (spa_t), KM_SLEEP); | |
431 | ||
34dc7c2f | 432 | mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL); |
34dc7c2f | 433 | mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL); |
428870ff | 434 | mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL); |
34dc7c2f | 435 | mutex_init(&spa->spa_history_lock, NULL, MUTEX_DEFAULT, NULL); |
428870ff | 436 | mutex_init(&spa->spa_proc_lock, NULL, MUTEX_DEFAULT, NULL); |
34dc7c2f | 437 | mutex_init(&spa->spa_props_lock, NULL, MUTEX_DEFAULT, NULL); |
428870ff BB |
438 | mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL); |
439 | mutex_init(&spa->spa_suspend_lock, NULL, MUTEX_DEFAULT, NULL); | |
440 | mutex_init(&spa->spa_vdev_top_lock, NULL, MUTEX_DEFAULT, NULL); | |
34dc7c2f BB |
441 | |
442 | cv_init(&spa->spa_async_cv, NULL, CV_DEFAULT, NULL); | |
428870ff | 443 | cv_init(&spa->spa_proc_cv, NULL, CV_DEFAULT, NULL); |
34dc7c2f | 444 | cv_init(&spa->spa_scrub_io_cv, NULL, CV_DEFAULT, NULL); |
b128c09f | 445 | cv_init(&spa->spa_suspend_cv, NULL, CV_DEFAULT, NULL); |
34dc7c2f | 446 | |
428870ff BB |
447 | for (int t = 0; t < TXG_SIZE; t++) |
448 | bplist_create(&spa->spa_free_bplist[t]); | |
449 | ||
b128c09f | 450 | (void) strlcpy(spa->spa_name, name, sizeof (spa->spa_name)); |
34dc7c2f BB |
451 | spa->spa_state = POOL_STATE_UNINITIALIZED; |
452 | spa->spa_freeze_txg = UINT64_MAX; | |
453 | spa->spa_final_txg = UINT64_MAX; | |
428870ff BB |
454 | spa->spa_load_max_txg = UINT64_MAX; |
455 | spa->spa_proc = &p0; | |
456 | spa->spa_proc_state = SPA_PROC_NONE; | |
34dc7c2f BB |
457 | |
458 | refcount_create(&spa->spa_refcount); | |
b128c09f | 459 | spa_config_lock_init(spa); |
34dc7c2f BB |
460 | |
461 | avl_add(&spa_namespace_avl, spa); | |
462 | ||
34dc7c2f BB |
463 | /* |
464 | * Set the alternate root, if there is one. | |
465 | */ | |
466 | if (altroot) { | |
467 | spa->spa_root = spa_strdup(altroot); | |
468 | spa_active_count++; | |
469 | } | |
470 | ||
b128c09f BB |
471 | /* |
472 | * Every pool starts with the default cachefile | |
473 | */ | |
474 | list_create(&spa->spa_config_list, sizeof (spa_config_dirent_t), | |
475 | offsetof(spa_config_dirent_t, scd_link)); | |
476 | ||
477 | dp = kmem_zalloc(sizeof (spa_config_dirent_t), KM_SLEEP); | |
428870ff | 478 | dp->scd_path = altroot ? NULL : spa_strdup(spa_config_path); |
b128c09f BB |
479 | list_insert_head(&spa->spa_config_list, dp); |
480 | ||
572e2857 BB |
481 | VERIFY(nvlist_alloc(&spa->spa_load_info, NV_UNIQUE_NAME, |
482 | KM_SLEEP) == 0); | |
483 | ||
428870ff BB |
484 | if (config != NULL) |
485 | VERIFY(nvlist_dup(config, &spa->spa_config, 0) == 0); | |
486 | ||
34dc7c2f BB |
487 | return (spa); |
488 | } | |
489 | ||
490 | /* | |
491 | * Removes a spa_t from the namespace, freeing up any memory used. Requires | |
492 | * spa_namespace_lock. This is called only after the spa_t has been closed and | |
493 | * deactivated. | |
494 | */ | |
495 | void | |
496 | spa_remove(spa_t *spa) | |
497 | { | |
b128c09f BB |
498 | spa_config_dirent_t *dp; |
499 | ||
34dc7c2f BB |
500 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); |
501 | ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); | |
34dc7c2f | 502 | |
428870ff BB |
503 | nvlist_free(spa->spa_config_splitting); |
504 | ||
34dc7c2f BB |
505 | avl_remove(&spa_namespace_avl, spa); |
506 | cv_broadcast(&spa_namespace_cv); | |
507 | ||
508 | if (spa->spa_root) { | |
509 | spa_strfree(spa->spa_root); | |
510 | spa_active_count--; | |
511 | } | |
512 | ||
b128c09f BB |
513 | while ((dp = list_head(&spa->spa_config_list)) != NULL) { |
514 | list_remove(&spa->spa_config_list, dp); | |
515 | if (dp->scd_path != NULL) | |
516 | spa_strfree(dp->scd_path); | |
517 | kmem_free(dp, sizeof (spa_config_dirent_t)); | |
518 | } | |
34dc7c2f | 519 | |
b128c09f | 520 | list_destroy(&spa->spa_config_list); |
34dc7c2f | 521 | |
572e2857 | 522 | nvlist_free(spa->spa_load_info); |
34dc7c2f BB |
523 | spa_config_set(spa, NULL); |
524 | ||
525 | refcount_destroy(&spa->spa_refcount); | |
526 | ||
b128c09f | 527 | spa_config_lock_destroy(spa); |
34dc7c2f | 528 | |
428870ff BB |
529 | for (int t = 0; t < TXG_SIZE; t++) |
530 | bplist_destroy(&spa->spa_free_bplist[t]); | |
531 | ||
34dc7c2f | 532 | cv_destroy(&spa->spa_async_cv); |
428870ff | 533 | cv_destroy(&spa->spa_proc_cv); |
34dc7c2f | 534 | cv_destroy(&spa->spa_scrub_io_cv); |
b128c09f | 535 | cv_destroy(&spa->spa_suspend_cv); |
34dc7c2f | 536 | |
34dc7c2f | 537 | mutex_destroy(&spa->spa_async_lock); |
34dc7c2f | 538 | mutex_destroy(&spa->spa_errlist_lock); |
428870ff | 539 | mutex_destroy(&spa->spa_errlog_lock); |
34dc7c2f | 540 | mutex_destroy(&spa->spa_history_lock); |
428870ff | 541 | mutex_destroy(&spa->spa_proc_lock); |
34dc7c2f | 542 | mutex_destroy(&spa->spa_props_lock); |
428870ff | 543 | mutex_destroy(&spa->spa_scrub_lock); |
b128c09f | 544 | mutex_destroy(&spa->spa_suspend_lock); |
428870ff | 545 | mutex_destroy(&spa->spa_vdev_top_lock); |
34dc7c2f BB |
546 | |
547 | kmem_free(spa, sizeof (spa_t)); | |
548 | } | |
549 | ||
550 | /* | |
551 | * Given a pool, return the next pool in the namespace, or NULL if there is | |
552 | * none. If 'prev' is NULL, return the first pool. | |
553 | */ | |
554 | spa_t * | |
555 | spa_next(spa_t *prev) | |
556 | { | |
557 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
558 | ||
559 | if (prev) | |
560 | return (AVL_NEXT(&spa_namespace_avl, prev)); | |
561 | else | |
562 | return (avl_first(&spa_namespace_avl)); | |
563 | } | |
564 | ||
565 | /* | |
566 | * ========================================================================== | |
567 | * SPA refcount functions | |
568 | * ========================================================================== | |
569 | */ | |
570 | ||
571 | /* | |
572 | * Add a reference to the given spa_t. Must have at least one reference, or | |
573 | * have the namespace lock held. | |
574 | */ | |
575 | void | |
576 | spa_open_ref(spa_t *spa, void *tag) | |
577 | { | |
b128c09f | 578 | ASSERT(refcount_count(&spa->spa_refcount) >= spa->spa_minref || |
34dc7c2f | 579 | MUTEX_HELD(&spa_namespace_lock)); |
34dc7c2f BB |
580 | (void) refcount_add(&spa->spa_refcount, tag); |
581 | } | |
582 | ||
583 | /* | |
584 | * Remove a reference to the given spa_t. Must have at least one reference, or | |
585 | * have the namespace lock held. | |
586 | */ | |
587 | void | |
588 | spa_close(spa_t *spa, void *tag) | |
589 | { | |
b128c09f | 590 | ASSERT(refcount_count(&spa->spa_refcount) > spa->spa_minref || |
34dc7c2f | 591 | MUTEX_HELD(&spa_namespace_lock)); |
34dc7c2f BB |
592 | (void) refcount_remove(&spa->spa_refcount, tag); |
593 | } | |
594 | ||
595 | /* | |
596 | * Check to see if the spa refcount is zero. Must be called with | |
b128c09f | 597 | * spa_namespace_lock held. We really compare against spa_minref, which is the |
34dc7c2f BB |
598 | * number of references acquired when opening a pool |
599 | */ | |
600 | boolean_t | |
601 | spa_refcount_zero(spa_t *spa) | |
602 | { | |
603 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
604 | ||
b128c09f | 605 | return (refcount_count(&spa->spa_refcount) == spa->spa_minref); |
34dc7c2f BB |
606 | } |
607 | ||
608 | /* | |
609 | * ========================================================================== | |
610 | * SPA spare and l2cache tracking | |
611 | * ========================================================================== | |
612 | */ | |
613 | ||
614 | /* | |
615 | * Hot spares and cache devices are tracked using the same code below, | |
616 | * for 'auxiliary' devices. | |
617 | */ | |
618 | ||
619 | typedef struct spa_aux { | |
620 | uint64_t aux_guid; | |
621 | uint64_t aux_pool; | |
622 | avl_node_t aux_avl; | |
623 | int aux_count; | |
624 | } spa_aux_t; | |
625 | ||
626 | static int | |
627 | spa_aux_compare(const void *a, const void *b) | |
628 | { | |
629 | const spa_aux_t *sa = a; | |
630 | const spa_aux_t *sb = b; | |
631 | ||
632 | if (sa->aux_guid < sb->aux_guid) | |
633 | return (-1); | |
634 | else if (sa->aux_guid > sb->aux_guid) | |
635 | return (1); | |
636 | else | |
637 | return (0); | |
638 | } | |
639 | ||
640 | void | |
641 | spa_aux_add(vdev_t *vd, avl_tree_t *avl) | |
642 | { | |
643 | avl_index_t where; | |
644 | spa_aux_t search; | |
645 | spa_aux_t *aux; | |
646 | ||
647 | search.aux_guid = vd->vdev_guid; | |
648 | if ((aux = avl_find(avl, &search, &where)) != NULL) { | |
649 | aux->aux_count++; | |
650 | } else { | |
651 | aux = kmem_zalloc(sizeof (spa_aux_t), KM_SLEEP); | |
652 | aux->aux_guid = vd->vdev_guid; | |
653 | aux->aux_count = 1; | |
654 | avl_insert(avl, aux, where); | |
655 | } | |
656 | } | |
657 | ||
658 | void | |
659 | spa_aux_remove(vdev_t *vd, avl_tree_t *avl) | |
660 | { | |
661 | spa_aux_t search; | |
662 | spa_aux_t *aux; | |
663 | avl_index_t where; | |
664 | ||
665 | search.aux_guid = vd->vdev_guid; | |
666 | aux = avl_find(avl, &search, &where); | |
667 | ||
668 | ASSERT(aux != NULL); | |
669 | ||
670 | if (--aux->aux_count == 0) { | |
671 | avl_remove(avl, aux); | |
672 | kmem_free(aux, sizeof (spa_aux_t)); | |
673 | } else if (aux->aux_pool == spa_guid(vd->vdev_spa)) { | |
674 | aux->aux_pool = 0ULL; | |
675 | } | |
676 | } | |
677 | ||
678 | boolean_t | |
b128c09f | 679 | spa_aux_exists(uint64_t guid, uint64_t *pool, int *refcnt, avl_tree_t *avl) |
34dc7c2f BB |
680 | { |
681 | spa_aux_t search, *found; | |
34dc7c2f BB |
682 | |
683 | search.aux_guid = guid; | |
b128c09f | 684 | found = avl_find(avl, &search, NULL); |
34dc7c2f BB |
685 | |
686 | if (pool) { | |
687 | if (found) | |
688 | *pool = found->aux_pool; | |
689 | else | |
690 | *pool = 0ULL; | |
691 | } | |
692 | ||
b128c09f BB |
693 | if (refcnt) { |
694 | if (found) | |
695 | *refcnt = found->aux_count; | |
696 | else | |
697 | *refcnt = 0; | |
698 | } | |
699 | ||
34dc7c2f BB |
700 | return (found != NULL); |
701 | } | |
702 | ||
703 | void | |
704 | spa_aux_activate(vdev_t *vd, avl_tree_t *avl) | |
705 | { | |
706 | spa_aux_t search, *found; | |
707 | avl_index_t where; | |
708 | ||
709 | search.aux_guid = vd->vdev_guid; | |
710 | found = avl_find(avl, &search, &where); | |
711 | ASSERT(found != NULL); | |
712 | ASSERT(found->aux_pool == 0ULL); | |
713 | ||
714 | found->aux_pool = spa_guid(vd->vdev_spa); | |
715 | } | |
716 | ||
717 | /* | |
718 | * Spares are tracked globally due to the following constraints: | |
719 | * | |
720 | * - A spare may be part of multiple pools. | |
721 | * - A spare may be added to a pool even if it's actively in use within | |
722 | * another pool. | |
723 | * - A spare in use in any pool can only be the source of a replacement if | |
724 | * the target is a spare in the same pool. | |
725 | * | |
726 | * We keep track of all spares on the system through the use of a reference | |
727 | * counted AVL tree. When a vdev is added as a spare, or used as a replacement | |
728 | * spare, then we bump the reference count in the AVL tree. In addition, we set | |
729 | * the 'vdev_isspare' member to indicate that the device is a spare (active or | |
730 | * inactive). When a spare is made active (used to replace a device in the | |
731 | * pool), we also keep track of which pool its been made a part of. | |
732 | * | |
733 | * The 'spa_spare_lock' protects the AVL tree. These functions are normally | |
734 | * called under the spa_namespace lock as part of vdev reconfiguration. The | |
735 | * separate spare lock exists for the status query path, which does not need to | |
736 | * be completely consistent with respect to other vdev configuration changes. | |
737 | */ | |
738 | ||
739 | static int | |
740 | spa_spare_compare(const void *a, const void *b) | |
741 | { | |
742 | return (spa_aux_compare(a, b)); | |
743 | } | |
744 | ||
745 | void | |
746 | spa_spare_add(vdev_t *vd) | |
747 | { | |
748 | mutex_enter(&spa_spare_lock); | |
749 | ASSERT(!vd->vdev_isspare); | |
750 | spa_aux_add(vd, &spa_spare_avl); | |
751 | vd->vdev_isspare = B_TRUE; | |
752 | mutex_exit(&spa_spare_lock); | |
753 | } | |
754 | ||
755 | void | |
756 | spa_spare_remove(vdev_t *vd) | |
757 | { | |
758 | mutex_enter(&spa_spare_lock); | |
759 | ASSERT(vd->vdev_isspare); | |
760 | spa_aux_remove(vd, &spa_spare_avl); | |
761 | vd->vdev_isspare = B_FALSE; | |
762 | mutex_exit(&spa_spare_lock); | |
763 | } | |
764 | ||
765 | boolean_t | |
b128c09f | 766 | spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt) |
34dc7c2f BB |
767 | { |
768 | boolean_t found; | |
769 | ||
770 | mutex_enter(&spa_spare_lock); | |
b128c09f | 771 | found = spa_aux_exists(guid, pool, refcnt, &spa_spare_avl); |
34dc7c2f BB |
772 | mutex_exit(&spa_spare_lock); |
773 | ||
774 | return (found); | |
775 | } | |
776 | ||
777 | void | |
778 | spa_spare_activate(vdev_t *vd) | |
779 | { | |
780 | mutex_enter(&spa_spare_lock); | |
781 | ASSERT(vd->vdev_isspare); | |
782 | spa_aux_activate(vd, &spa_spare_avl); | |
783 | mutex_exit(&spa_spare_lock); | |
784 | } | |
785 | ||
786 | /* | |
787 | * Level 2 ARC devices are tracked globally for the same reasons as spares. | |
788 | * Cache devices currently only support one pool per cache device, and so | |
789 | * for these devices the aux reference count is currently unused beyond 1. | |
790 | */ | |
791 | ||
792 | static int | |
793 | spa_l2cache_compare(const void *a, const void *b) | |
794 | { | |
795 | return (spa_aux_compare(a, b)); | |
796 | } | |
797 | ||
798 | void | |
799 | spa_l2cache_add(vdev_t *vd) | |
800 | { | |
801 | mutex_enter(&spa_l2cache_lock); | |
802 | ASSERT(!vd->vdev_isl2cache); | |
803 | spa_aux_add(vd, &spa_l2cache_avl); | |
804 | vd->vdev_isl2cache = B_TRUE; | |
805 | mutex_exit(&spa_l2cache_lock); | |
806 | } | |
807 | ||
808 | void | |
809 | spa_l2cache_remove(vdev_t *vd) | |
810 | { | |
811 | mutex_enter(&spa_l2cache_lock); | |
812 | ASSERT(vd->vdev_isl2cache); | |
813 | spa_aux_remove(vd, &spa_l2cache_avl); | |
814 | vd->vdev_isl2cache = B_FALSE; | |
815 | mutex_exit(&spa_l2cache_lock); | |
816 | } | |
817 | ||
818 | boolean_t | |
819 | spa_l2cache_exists(uint64_t guid, uint64_t *pool) | |
820 | { | |
821 | boolean_t found; | |
822 | ||
823 | mutex_enter(&spa_l2cache_lock); | |
b128c09f | 824 | found = spa_aux_exists(guid, pool, NULL, &spa_l2cache_avl); |
34dc7c2f BB |
825 | mutex_exit(&spa_l2cache_lock); |
826 | ||
827 | return (found); | |
828 | } | |
829 | ||
830 | void | |
831 | spa_l2cache_activate(vdev_t *vd) | |
832 | { | |
833 | mutex_enter(&spa_l2cache_lock); | |
834 | ASSERT(vd->vdev_isl2cache); | |
835 | spa_aux_activate(vd, &spa_l2cache_avl); | |
836 | mutex_exit(&spa_l2cache_lock); | |
837 | } | |
838 | ||
34dc7c2f BB |
839 | /* |
840 | * ========================================================================== | |
841 | * SPA vdev locking | |
842 | * ========================================================================== | |
843 | */ | |
844 | ||
845 | /* | |
846 | * Lock the given spa_t for the purpose of adding or removing a vdev. | |
847 | * Grabs the global spa_namespace_lock plus the spa config lock for writing. | |
848 | * It returns the next transaction group for the spa_t. | |
849 | */ | |
850 | uint64_t | |
851 | spa_vdev_enter(spa_t *spa) | |
852 | { | |
428870ff | 853 | mutex_enter(&spa->spa_vdev_top_lock); |
34dc7c2f | 854 | mutex_enter(&spa_namespace_lock); |
428870ff BB |
855 | return (spa_vdev_config_enter(spa)); |
856 | } | |
857 | ||
858 | /* | |
859 | * Internal implementation for spa_vdev_enter(). Used when a vdev | |
860 | * operation requires multiple syncs (i.e. removing a device) while | |
861 | * keeping the spa_namespace_lock held. | |
862 | */ | |
863 | uint64_t | |
864 | spa_vdev_config_enter(spa_t *spa) | |
865 | { | |
866 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
34dc7c2f | 867 | |
b128c09f | 868 | spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); |
34dc7c2f BB |
869 | |
870 | return (spa_last_synced_txg(spa) + 1); | |
871 | } | |
872 | ||
873 | /* | |
428870ff BB |
874 | * Used in combination with spa_vdev_config_enter() to allow the syncing |
875 | * of multiple transactions without releasing the spa_namespace_lock. | |
34dc7c2f | 876 | */ |
428870ff BB |
877 | void |
878 | spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error, char *tag) | |
34dc7c2f | 879 | { |
428870ff BB |
880 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); |
881 | ||
34dc7c2f BB |
882 | int config_changed = B_FALSE; |
883 | ||
884 | ASSERT(txg > spa_last_synced_txg(spa)); | |
885 | ||
b128c09f BB |
886 | spa->spa_pending_vdev = NULL; |
887 | ||
34dc7c2f BB |
888 | /* |
889 | * Reassess the DTLs. | |
890 | */ | |
891 | vdev_dtl_reassess(spa->spa_root_vdev, 0, 0, B_FALSE); | |
892 | ||
b128c09f | 893 | if (error == 0 && !list_is_empty(&spa->spa_config_dirty_list)) { |
34dc7c2f | 894 | config_changed = B_TRUE; |
428870ff | 895 | spa->spa_config_generation++; |
34dc7c2f BB |
896 | } |
897 | ||
428870ff BB |
898 | /* |
899 | * Verify the metaslab classes. | |
900 | */ | |
901 | ASSERT(metaslab_class_validate(spa_normal_class(spa)) == 0); | |
902 | ASSERT(metaslab_class_validate(spa_log_class(spa)) == 0); | |
903 | ||
b128c09f | 904 | spa_config_exit(spa, SCL_ALL, spa); |
34dc7c2f | 905 | |
428870ff BB |
906 | /* |
907 | * Panic the system if the specified tag requires it. This | |
908 | * is useful for ensuring that configurations are updated | |
909 | * transactionally. | |
910 | */ | |
911 | if (zio_injection_enabled) | |
912 | zio_handle_panic_injection(spa, tag, 0); | |
913 | ||
34dc7c2f BB |
914 | /* |
915 | * Note: this txg_wait_synced() is important because it ensures | |
916 | * that there won't be more than one config change per txg. | |
917 | * This allows us to use the txg as the generation number. | |
918 | */ | |
919 | if (error == 0) | |
920 | txg_wait_synced(spa->spa_dsl_pool, txg); | |
921 | ||
922 | if (vd != NULL) { | |
fb5f0bc8 BB |
923 | ASSERT(!vd->vdev_detached || vd->vdev_dtl_smo.smo_object == 0); |
924 | spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); | |
34dc7c2f | 925 | vdev_free(vd); |
fb5f0bc8 | 926 | spa_config_exit(spa, SCL_ALL, spa); |
34dc7c2f BB |
927 | } |
928 | ||
929 | /* | |
930 | * If the config changed, update the config cache. | |
931 | */ | |
932 | if (config_changed) | |
b128c09f | 933 | spa_config_sync(spa, B_FALSE, B_TRUE); |
428870ff | 934 | } |
34dc7c2f | 935 | |
428870ff BB |
936 | /* |
937 | * Unlock the spa_t after adding or removing a vdev. Besides undoing the | |
938 | * locking of spa_vdev_enter(), we also want make sure the transactions have | |
939 | * synced to disk, and then update the global configuration cache with the new | |
940 | * information. | |
941 | */ | |
942 | int | |
943 | spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error) | |
944 | { | |
945 | spa_vdev_config_exit(spa, vd, txg, error, FTAG); | |
34dc7c2f | 946 | mutex_exit(&spa_namespace_lock); |
428870ff | 947 | mutex_exit(&spa->spa_vdev_top_lock); |
34dc7c2f BB |
948 | |
949 | return (error); | |
950 | } | |
951 | ||
b128c09f BB |
952 | /* |
953 | * Lock the given spa_t for the purpose of changing vdev state. | |
954 | */ | |
955 | void | |
428870ff | 956 | spa_vdev_state_enter(spa_t *spa, int oplocks) |
b128c09f | 957 | { |
428870ff BB |
958 | int locks = SCL_STATE_ALL | oplocks; |
959 | ||
960 | /* | |
961 | * Root pools may need to read of the underlying devfs filesystem | |
962 | * when opening up a vdev. Unfortunately if we're holding the | |
963 | * SCL_ZIO lock it will result in a deadlock when we try to issue | |
964 | * the read from the root filesystem. Instead we "prefetch" | |
965 | * the associated vnodes that we need prior to opening the | |
966 | * underlying devices and cache them so that we can prevent | |
967 | * any I/O when we are doing the actual open. | |
968 | */ | |
969 | if (spa_is_root(spa)) { | |
970 | int low = locks & ~(SCL_ZIO - 1); | |
971 | int high = locks & ~low; | |
972 | ||
973 | spa_config_enter(spa, high, spa, RW_WRITER); | |
974 | vdev_hold(spa->spa_root_vdev); | |
975 | spa_config_enter(spa, low, spa, RW_WRITER); | |
976 | } else { | |
977 | spa_config_enter(spa, locks, spa, RW_WRITER); | |
978 | } | |
979 | spa->spa_vdev_locks = locks; | |
b128c09f BB |
980 | } |
981 | ||
982 | int | |
983 | spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error) | |
984 | { | |
428870ff BB |
985 | boolean_t config_changed = B_FALSE; |
986 | ||
987 | if (vd != NULL || error == 0) | |
988 | vdev_dtl_reassess(vd ? vd->vdev_top : spa->spa_root_vdev, | |
989 | 0, 0, B_FALSE); | |
990 | ||
991 | if (vd != NULL) { | |
b128c09f | 992 | vdev_state_dirty(vd->vdev_top); |
428870ff BB |
993 | config_changed = B_TRUE; |
994 | spa->spa_config_generation++; | |
995 | } | |
b128c09f | 996 | |
428870ff BB |
997 | if (spa_is_root(spa)) |
998 | vdev_rele(spa->spa_root_vdev); | |
999 | ||
1000 | ASSERT3U(spa->spa_vdev_locks, >=, SCL_STATE_ALL); | |
1001 | spa_config_exit(spa, spa->spa_vdev_locks, spa); | |
b128c09f | 1002 | |
fb5f0bc8 BB |
1003 | /* |
1004 | * If anything changed, wait for it to sync. This ensures that, | |
1005 | * from the system administrator's perspective, zpool(1M) commands | |
1006 | * are synchronous. This is important for things like zpool offline: | |
1007 | * when the command completes, you expect no further I/O from ZFS. | |
1008 | */ | |
1009 | if (vd != NULL) | |
1010 | txg_wait_synced(spa->spa_dsl_pool, 0); | |
1011 | ||
428870ff BB |
1012 | /* |
1013 | * If the config changed, update the config cache. | |
1014 | */ | |
1015 | if (config_changed) { | |
1016 | mutex_enter(&spa_namespace_lock); | |
1017 | spa_config_sync(spa, B_FALSE, B_TRUE); | |
1018 | mutex_exit(&spa_namespace_lock); | |
1019 | } | |
1020 | ||
b128c09f BB |
1021 | return (error); |
1022 | } | |
1023 | ||
34dc7c2f BB |
1024 | /* |
1025 | * ========================================================================== | |
1026 | * Miscellaneous functions | |
1027 | * ========================================================================== | |
1028 | */ | |
1029 | ||
1030 | /* | |
1031 | * Rename a spa_t. | |
1032 | */ | |
1033 | int | |
1034 | spa_rename(const char *name, const char *newname) | |
1035 | { | |
1036 | spa_t *spa; | |
1037 | int err; | |
1038 | ||
1039 | /* | |
1040 | * Lookup the spa_t and grab the config lock for writing. We need to | |
1041 | * actually open the pool so that we can sync out the necessary labels. | |
1042 | * It's OK to call spa_open() with the namespace lock held because we | |
1043 | * allow recursive calls for other reasons. | |
1044 | */ | |
1045 | mutex_enter(&spa_namespace_lock); | |
1046 | if ((err = spa_open(name, &spa, FTAG)) != 0) { | |
1047 | mutex_exit(&spa_namespace_lock); | |
1048 | return (err); | |
1049 | } | |
1050 | ||
b128c09f | 1051 | spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); |
34dc7c2f BB |
1052 | |
1053 | avl_remove(&spa_namespace_avl, spa); | |
b128c09f | 1054 | (void) strlcpy(spa->spa_name, newname, sizeof (spa->spa_name)); |
34dc7c2f BB |
1055 | avl_add(&spa_namespace_avl, spa); |
1056 | ||
1057 | /* | |
1058 | * Sync all labels to disk with the new names by marking the root vdev | |
1059 | * dirty and waiting for it to sync. It will pick up the new pool name | |
1060 | * during the sync. | |
1061 | */ | |
1062 | vdev_config_dirty(spa->spa_root_vdev); | |
1063 | ||
b128c09f | 1064 | spa_config_exit(spa, SCL_ALL, FTAG); |
34dc7c2f BB |
1065 | |
1066 | txg_wait_synced(spa->spa_dsl_pool, 0); | |
1067 | ||
1068 | /* | |
1069 | * Sync the updated config cache. | |
1070 | */ | |
b128c09f | 1071 | spa_config_sync(spa, B_FALSE, B_TRUE); |
34dc7c2f BB |
1072 | |
1073 | spa_close(spa, FTAG); | |
1074 | ||
1075 | mutex_exit(&spa_namespace_lock); | |
1076 | ||
1077 | return (0); | |
1078 | } | |
1079 | ||
34dc7c2f | 1080 | /* |
572e2857 BB |
1081 | * Return the spa_t associated with given pool_guid, if it exists. If |
1082 | * device_guid is non-zero, determine whether the pool exists *and* contains | |
1083 | * a device with the specified device_guid. | |
34dc7c2f | 1084 | */ |
572e2857 BB |
1085 | spa_t * |
1086 | spa_by_guid(uint64_t pool_guid, uint64_t device_guid) | |
34dc7c2f BB |
1087 | { |
1088 | spa_t *spa; | |
1089 | avl_tree_t *t = &spa_namespace_avl; | |
1090 | ||
1091 | ASSERT(MUTEX_HELD(&spa_namespace_lock)); | |
1092 | ||
1093 | for (spa = avl_first(t); spa != NULL; spa = AVL_NEXT(t, spa)) { | |
1094 | if (spa->spa_state == POOL_STATE_UNINITIALIZED) | |
1095 | continue; | |
1096 | if (spa->spa_root_vdev == NULL) | |
1097 | continue; | |
1098 | if (spa_guid(spa) == pool_guid) { | |
1099 | if (device_guid == 0) | |
1100 | break; | |
1101 | ||
1102 | if (vdev_lookup_by_guid(spa->spa_root_vdev, | |
1103 | device_guid) != NULL) | |
1104 | break; | |
1105 | ||
1106 | /* | |
1107 | * Check any devices we may be in the process of adding. | |
1108 | */ | |
1109 | if (spa->spa_pending_vdev) { | |
1110 | if (vdev_lookup_by_guid(spa->spa_pending_vdev, | |
1111 | device_guid) != NULL) | |
1112 | break; | |
1113 | } | |
1114 | } | |
1115 | } | |
1116 | ||
572e2857 BB |
1117 | return (spa); |
1118 | } | |
1119 | ||
1120 | /* | |
1121 | * Determine whether a pool with the given pool_guid exists. | |
1122 | */ | |
1123 | boolean_t | |
1124 | spa_guid_exists(uint64_t pool_guid, uint64_t device_guid) | |
1125 | { | |
1126 | return (spa_by_guid(pool_guid, device_guid) != NULL); | |
34dc7c2f BB |
1127 | } |
1128 | ||
1129 | char * | |
1130 | spa_strdup(const char *s) | |
1131 | { | |
1132 | size_t len; | |
1133 | char *new; | |
1134 | ||
1135 | len = strlen(s); | |
1136 | new = kmem_alloc(len + 1, KM_SLEEP); | |
1137 | bcopy(s, new, len); | |
1138 | new[len] = '\0'; | |
1139 | ||
1140 | return (new); | |
1141 | } | |
1142 | ||
1143 | void | |
1144 | spa_strfree(char *s) | |
1145 | { | |
1146 | kmem_free(s, strlen(s) + 1); | |
1147 | } | |
1148 | ||
1149 | uint64_t | |
1150 | spa_get_random(uint64_t range) | |
1151 | { | |
1152 | uint64_t r; | |
1153 | ||
1154 | ASSERT(range != 0); | |
1155 | ||
1156 | (void) random_get_pseudo_bytes((void *)&r, sizeof (uint64_t)); | |
1157 | ||
1158 | return (r % range); | |
1159 | } | |
1160 | ||
428870ff BB |
1161 | uint64_t |
1162 | spa_generate_guid(spa_t *spa) | |
34dc7c2f | 1163 | { |
428870ff | 1164 | uint64_t guid = spa_get_random(-1ULL); |
34dc7c2f | 1165 | |
428870ff BB |
1166 | if (spa != NULL) { |
1167 | while (guid == 0 || spa_guid_exists(spa_guid(spa), guid)) | |
1168 | guid = spa_get_random(-1ULL); | |
1169 | } else { | |
1170 | while (guid == 0 || spa_guid_exists(guid, 0)) | |
1171 | guid = spa_get_random(-1ULL); | |
34dc7c2f BB |
1172 | } |
1173 | ||
428870ff BB |
1174 | return (guid); |
1175 | } | |
1176 | ||
1177 | void | |
1178 | sprintf_blkptr(char *buf, const blkptr_t *bp) | |
1179 | { | |
1180 | char *type = NULL; | |
1181 | char *checksum = NULL; | |
1182 | char *compress = NULL; | |
34dc7c2f | 1183 | |
428870ff BB |
1184 | if (bp != NULL) { |
1185 | type = dmu_ot[BP_GET_TYPE(bp)].ot_name; | |
1186 | checksum = zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name; | |
1187 | compress = zio_compress_table[BP_GET_COMPRESS(bp)].ci_name; | |
34dc7c2f BB |
1188 | } |
1189 | ||
428870ff | 1190 | SPRINTF_BLKPTR(snprintf, ' ', buf, bp, type, checksum, compress); |
34dc7c2f BB |
1191 | } |
1192 | ||
1193 | void | |
1194 | spa_freeze(spa_t *spa) | |
1195 | { | |
1196 | uint64_t freeze_txg = 0; | |
1197 | ||
b128c09f | 1198 | spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); |
34dc7c2f BB |
1199 | if (spa->spa_freeze_txg == UINT64_MAX) { |
1200 | freeze_txg = spa_last_synced_txg(spa) + TXG_SIZE; | |
1201 | spa->spa_freeze_txg = freeze_txg; | |
1202 | } | |
b128c09f | 1203 | spa_config_exit(spa, SCL_ALL, FTAG); |
34dc7c2f BB |
1204 | if (freeze_txg != 0) |
1205 | txg_wait_synced(spa_get_dsl(spa), freeze_txg); | |
1206 | } | |
1207 | ||
1208 | void | |
1209 | zfs_panic_recover(const char *fmt, ...) | |
1210 | { | |
1211 | va_list adx; | |
1212 | ||
1213 | va_start(adx, fmt); | |
1214 | vcmn_err(zfs_recover ? CE_WARN : CE_PANIC, fmt, adx); | |
1215 | va_end(adx); | |
1216 | } | |
1217 | ||
428870ff BB |
1218 | /* |
1219 | * This is a stripped-down version of strtoull, suitable only for converting | |
1220 | * lowercase hexidecimal numbers that don't overflow. | |
1221 | */ | |
1222 | uint64_t | |
1223 | strtonum(const char *str, char **nptr) | |
1224 | { | |
1225 | uint64_t val = 0; | |
1226 | char c; | |
1227 | int digit; | |
1228 | ||
1229 | while ((c = *str) != '\0') { | |
1230 | if (c >= '0' && c <= '9') | |
1231 | digit = c - '0'; | |
1232 | else if (c >= 'a' && c <= 'f') | |
1233 | digit = 10 + c - 'a'; | |
1234 | else | |
1235 | break; | |
1236 | ||
1237 | val *= 16; | |
1238 | val += digit; | |
1239 | ||
1240 | str++; | |
1241 | } | |
1242 | ||
1243 | if (nptr) | |
1244 | *nptr = (char *)str; | |
1245 | ||
1246 | return (val); | |
1247 | } | |
1248 | ||
34dc7c2f BB |
1249 | /* |
1250 | * ========================================================================== | |
1251 | * Accessor functions | |
1252 | * ========================================================================== | |
1253 | */ | |
1254 | ||
b128c09f BB |
1255 | boolean_t |
1256 | spa_shutting_down(spa_t *spa) | |
34dc7c2f | 1257 | { |
b128c09f | 1258 | return (spa->spa_async_suspended); |
34dc7c2f BB |
1259 | } |
1260 | ||
1261 | dsl_pool_t * | |
1262 | spa_get_dsl(spa_t *spa) | |
1263 | { | |
1264 | return (spa->spa_dsl_pool); | |
1265 | } | |
1266 | ||
1267 | blkptr_t * | |
1268 | spa_get_rootblkptr(spa_t *spa) | |
1269 | { | |
1270 | return (&spa->spa_ubsync.ub_rootbp); | |
1271 | } | |
1272 | ||
1273 | void | |
1274 | spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp) | |
1275 | { | |
1276 | spa->spa_uberblock.ub_rootbp = *bp; | |
1277 | } | |
1278 | ||
1279 | void | |
1280 | spa_altroot(spa_t *spa, char *buf, size_t buflen) | |
1281 | { | |
1282 | if (spa->spa_root == NULL) | |
1283 | buf[0] = '\0'; | |
1284 | else | |
1285 | (void) strncpy(buf, spa->spa_root, buflen); | |
1286 | } | |
1287 | ||
1288 | int | |
1289 | spa_sync_pass(spa_t *spa) | |
1290 | { | |
1291 | return (spa->spa_sync_pass); | |
1292 | } | |
1293 | ||
1294 | char * | |
1295 | spa_name(spa_t *spa) | |
1296 | { | |
34dc7c2f BB |
1297 | return (spa->spa_name); |
1298 | } | |
1299 | ||
1300 | uint64_t | |
1301 | spa_guid(spa_t *spa) | |
1302 | { | |
1303 | /* | |
1304 | * If we fail to parse the config during spa_load(), we can go through | |
1305 | * the error path (which posts an ereport) and end up here with no root | |
1306 | * vdev. We stash the original pool guid in 'spa_load_guid' to handle | |
1307 | * this case. | |
1308 | */ | |
1309 | if (spa->spa_root_vdev != NULL) | |
1310 | return (spa->spa_root_vdev->vdev_guid); | |
1311 | else | |
1312 | return (spa->spa_load_guid); | |
1313 | } | |
1314 | ||
1315 | uint64_t | |
1316 | spa_last_synced_txg(spa_t *spa) | |
1317 | { | |
1318 | return (spa->spa_ubsync.ub_txg); | |
1319 | } | |
1320 | ||
1321 | uint64_t | |
1322 | spa_first_txg(spa_t *spa) | |
1323 | { | |
1324 | return (spa->spa_first_txg); | |
1325 | } | |
1326 | ||
428870ff BB |
1327 | uint64_t |
1328 | spa_syncing_txg(spa_t *spa) | |
1329 | { | |
1330 | return (spa->spa_syncing_txg); | |
1331 | } | |
1332 | ||
b128c09f | 1333 | pool_state_t |
34dc7c2f BB |
1334 | spa_state(spa_t *spa) |
1335 | { | |
1336 | return (spa->spa_state); | |
1337 | } | |
1338 | ||
428870ff BB |
1339 | spa_load_state_t |
1340 | spa_load_state(spa_t *spa) | |
34dc7c2f | 1341 | { |
428870ff | 1342 | return (spa->spa_load_state); |
34dc7c2f BB |
1343 | } |
1344 | ||
34dc7c2f | 1345 | uint64_t |
428870ff | 1346 | spa_freeze_txg(spa_t *spa) |
34dc7c2f | 1347 | { |
428870ff | 1348 | return (spa->spa_freeze_txg); |
34dc7c2f BB |
1349 | } |
1350 | ||
428870ff | 1351 | /* ARGSUSED */ |
34dc7c2f | 1352 | uint64_t |
428870ff | 1353 | spa_get_asize(spa_t *spa, uint64_t lsize) |
34dc7c2f | 1354 | { |
428870ff BB |
1355 | /* |
1356 | * The worst case is single-sector max-parity RAID-Z blocks, in which | |
1357 | * case the space requirement is exactly (VDEV_RAIDZ_MAXPARITY + 1) | |
1358 | * times the size; so just assume that. Add to this the fact that | |
1359 | * we can have up to 3 DVAs per bp, and one more factor of 2 because | |
1360 | * the block may be dittoed with up to 3 DVAs by ddt_sync(). | |
1361 | */ | |
1362 | return (lsize * (VDEV_RAIDZ_MAXPARITY + 1) * SPA_DVAS_PER_BP * 2); | |
34dc7c2f BB |
1363 | } |
1364 | ||
34dc7c2f BB |
1365 | uint64_t |
1366 | spa_get_dspace(spa_t *spa) | |
1367 | { | |
428870ff | 1368 | return (spa->spa_dspace); |
34dc7c2f BB |
1369 | } |
1370 | ||
428870ff BB |
1371 | void |
1372 | spa_update_dspace(spa_t *spa) | |
34dc7c2f | 1373 | { |
428870ff BB |
1374 | spa->spa_dspace = metaslab_class_get_dspace(spa_normal_class(spa)) + |
1375 | ddt_get_dedup_dspace(spa); | |
34dc7c2f BB |
1376 | } |
1377 | ||
1378 | /* | |
1379 | * Return the failure mode that has been set to this pool. The default | |
1380 | * behavior will be to block all I/Os when a complete failure occurs. | |
1381 | */ | |
1382 | uint8_t | |
1383 | spa_get_failmode(spa_t *spa) | |
1384 | { | |
1385 | return (spa->spa_failmode); | |
1386 | } | |
1387 | ||
b128c09f BB |
1388 | boolean_t |
1389 | spa_suspended(spa_t *spa) | |
1390 | { | |
1391 | return (spa->spa_suspended); | |
1392 | } | |
1393 | ||
34dc7c2f BB |
1394 | uint64_t |
1395 | spa_version(spa_t *spa) | |
1396 | { | |
1397 | return (spa->spa_ubsync.ub_version); | |
1398 | } | |
1399 | ||
428870ff BB |
1400 | boolean_t |
1401 | spa_deflate(spa_t *spa) | |
1402 | { | |
1403 | return (spa->spa_deflate); | |
1404 | } | |
1405 | ||
1406 | metaslab_class_t * | |
1407 | spa_normal_class(spa_t *spa) | |
1408 | { | |
1409 | return (spa->spa_normal_class); | |
1410 | } | |
1411 | ||
1412 | metaslab_class_t * | |
1413 | spa_log_class(spa_t *spa) | |
1414 | { | |
1415 | return (spa->spa_log_class); | |
1416 | } | |
1417 | ||
34dc7c2f BB |
1418 | int |
1419 | spa_max_replication(spa_t *spa) | |
1420 | { | |
1421 | /* | |
1422 | * As of SPA_VERSION == SPA_VERSION_DITTO_BLOCKS, we are able to | |
1423 | * handle BPs with more than one DVA allocated. Set our max | |
1424 | * replication level accordingly. | |
1425 | */ | |
1426 | if (spa_version(spa) < SPA_VERSION_DITTO_BLOCKS) | |
1427 | return (1); | |
1428 | return (MIN(SPA_DVAS_PER_BP, spa_max_replication_override)); | |
1429 | } | |
1430 | ||
428870ff BB |
1431 | int |
1432 | spa_prev_software_version(spa_t *spa) | |
1433 | { | |
1434 | return (spa->spa_prev_software_version); | |
1435 | } | |
1436 | ||
34dc7c2f | 1437 | uint64_t |
428870ff | 1438 | dva_get_dsize_sync(spa_t *spa, const dva_t *dva) |
34dc7c2f | 1439 | { |
428870ff BB |
1440 | uint64_t asize = DVA_GET_ASIZE(dva); |
1441 | uint64_t dsize = asize; | |
34dc7c2f | 1442 | |
428870ff | 1443 | ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); |
34dc7c2f | 1444 | |
428870ff BB |
1445 | if (asize != 0 && spa->spa_deflate) { |
1446 | vdev_t *vd = vdev_lookup_top(spa, DVA_GET_VDEV(dva)); | |
1447 | dsize = (asize >> SPA_MINBLOCKSHIFT) * vd->vdev_deflate_ratio; | |
34dc7c2f | 1448 | } |
428870ff BB |
1449 | |
1450 | return (dsize); | |
1451 | } | |
1452 | ||
1453 | uint64_t | |
1454 | bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp) | |
1455 | { | |
1456 | uint64_t dsize = 0; | |
1457 | ||
1458 | for (int d = 0; d < SPA_DVAS_PER_BP; d++) | |
1459 | dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]); | |
1460 | ||
1461 | return (dsize); | |
1462 | } | |
1463 | ||
1464 | uint64_t | |
1465 | bp_get_dsize(spa_t *spa, const blkptr_t *bp) | |
1466 | { | |
1467 | uint64_t dsize = 0; | |
1468 | ||
1469 | spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER); | |
1470 | ||
1471 | for (int d = 0; d < SPA_DVAS_PER_BP; d++) | |
1472 | dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]); | |
1473 | ||
b128c09f | 1474 | spa_config_exit(spa, SCL_VDEV, FTAG); |
428870ff BB |
1475 | |
1476 | return (dsize); | |
34dc7c2f BB |
1477 | } |
1478 | ||
1479 | /* | |
1480 | * ========================================================================== | |
1481 | * Initialization and Termination | |
1482 | * ========================================================================== | |
1483 | */ | |
1484 | ||
1485 | static int | |
1486 | spa_name_compare(const void *a1, const void *a2) | |
1487 | { | |
1488 | const spa_t *s1 = a1; | |
1489 | const spa_t *s2 = a2; | |
1490 | int s; | |
1491 | ||
1492 | s = strcmp(s1->spa_name, s2->spa_name); | |
1493 | if (s > 0) | |
1494 | return (1); | |
1495 | if (s < 0) | |
1496 | return (-1); | |
1497 | return (0); | |
1498 | } | |
1499 | ||
1500 | int | |
1501 | spa_busy(void) | |
1502 | { | |
1503 | return (spa_active_count); | |
1504 | } | |
1505 | ||
1506 | void | |
1507 | spa_boot_init() | |
1508 | { | |
1509 | spa_config_load(); | |
1510 | } | |
1511 | ||
1512 | void | |
1513 | spa_init(int mode) | |
1514 | { | |
1515 | mutex_init(&spa_namespace_lock, NULL, MUTEX_DEFAULT, NULL); | |
1516 | mutex_init(&spa_spare_lock, NULL, MUTEX_DEFAULT, NULL); | |
1517 | mutex_init(&spa_l2cache_lock, NULL, MUTEX_DEFAULT, NULL); | |
1518 | cv_init(&spa_namespace_cv, NULL, CV_DEFAULT, NULL); | |
1519 | ||
1520 | avl_create(&spa_namespace_avl, spa_name_compare, sizeof (spa_t), | |
1521 | offsetof(spa_t, spa_avl)); | |
1522 | ||
1523 | avl_create(&spa_spare_avl, spa_spare_compare, sizeof (spa_aux_t), | |
1524 | offsetof(spa_aux_t, aux_avl)); | |
1525 | ||
1526 | avl_create(&spa_l2cache_avl, spa_l2cache_compare, sizeof (spa_aux_t), | |
1527 | offsetof(spa_aux_t, aux_avl)); | |
1528 | ||
fb5f0bc8 | 1529 | spa_mode_global = mode; |
34dc7c2f BB |
1530 | |
1531 | refcount_init(); | |
1532 | unique_init(); | |
1533 | zio_init(); | |
1534 | dmu_init(); | |
1535 | zil_init(); | |
1536 | vdev_cache_stat_init(); | |
1537 | zfs_prop_init(); | |
1538 | zpool_prop_init(); | |
1539 | spa_config_load(); | |
b128c09f | 1540 | l2arc_start(); |
34dc7c2f BB |
1541 | } |
1542 | ||
1543 | void | |
1544 | spa_fini(void) | |
1545 | { | |
b128c09f BB |
1546 | l2arc_stop(); |
1547 | ||
34dc7c2f BB |
1548 | spa_evict_all(); |
1549 | ||
1550 | vdev_cache_stat_fini(); | |
1551 | zil_fini(); | |
1552 | dmu_fini(); | |
1553 | zio_fini(); | |
1554 | unique_fini(); | |
1555 | refcount_fini(); | |
1556 | ||
1557 | avl_destroy(&spa_namespace_avl); | |
1558 | avl_destroy(&spa_spare_avl); | |
1559 | avl_destroy(&spa_l2cache_avl); | |
1560 | ||
1561 | cv_destroy(&spa_namespace_cv); | |
1562 | mutex_destroy(&spa_namespace_lock); | |
1563 | mutex_destroy(&spa_spare_lock); | |
1564 | mutex_destroy(&spa_l2cache_lock); | |
1565 | } | |
1566 | ||
1567 | /* | |
1568 | * Return whether this pool has slogs. No locking needed. | |
1569 | * It's not a problem if the wrong answer is returned as it's only for | |
1570 | * performance and not correctness | |
1571 | */ | |
1572 | boolean_t | |
1573 | spa_has_slogs(spa_t *spa) | |
1574 | { | |
1575 | return (spa->spa_log_class->mc_rotor != NULL); | |
1576 | } | |
b128c09f | 1577 | |
428870ff BB |
1578 | spa_log_state_t |
1579 | spa_get_log_state(spa_t *spa) | |
1580 | { | |
1581 | return (spa->spa_log_state); | |
1582 | } | |
1583 | ||
1584 | void | |
1585 | spa_set_log_state(spa_t *spa, spa_log_state_t state) | |
1586 | { | |
1587 | spa->spa_log_state = state; | |
1588 | } | |
1589 | ||
b128c09f BB |
1590 | boolean_t |
1591 | spa_is_root(spa_t *spa) | |
1592 | { | |
1593 | return (spa->spa_is_root); | |
1594 | } | |
fb5f0bc8 BB |
1595 | |
1596 | boolean_t | |
1597 | spa_writeable(spa_t *spa) | |
1598 | { | |
1599 | return (!!(spa->spa_mode & FWRITE)); | |
1600 | } | |
1601 | ||
1602 | int | |
1603 | spa_mode(spa_t *spa) | |
1604 | { | |
1605 | return (spa->spa_mode); | |
1606 | } | |
428870ff BB |
1607 | |
1608 | uint64_t | |
1609 | spa_bootfs(spa_t *spa) | |
1610 | { | |
1611 | return (spa->spa_bootfs); | |
1612 | } | |
1613 | ||
1614 | uint64_t | |
1615 | spa_delegation(spa_t *spa) | |
1616 | { | |
1617 | return (spa->spa_delegation); | |
1618 | } | |
1619 | ||
1620 | objset_t * | |
1621 | spa_meta_objset(spa_t *spa) | |
1622 | { | |
1623 | return (spa->spa_meta_objset); | |
1624 | } | |
1625 | ||
1626 | enum zio_checksum | |
1627 | spa_dedup_checksum(spa_t *spa) | |
1628 | { | |
1629 | return (spa->spa_dedup_checksum); | |
1630 | } | |
1631 | ||
1632 | /* | |
1633 | * Reset pool scan stat per scan pass (or reboot). | |
1634 | */ | |
1635 | void | |
1636 | spa_scan_stat_init(spa_t *spa) | |
1637 | { | |
1638 | /* data not stored on disk */ | |
1639 | spa->spa_scan_pass_start = gethrestime_sec(); | |
1640 | spa->spa_scan_pass_exam = 0; | |
1641 | vdev_scan_stat_init(spa->spa_root_vdev); | |
1642 | } | |
1643 | ||
1644 | /* | |
1645 | * Get scan stats for zpool status reports | |
1646 | */ | |
1647 | int | |
1648 | spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps) | |
1649 | { | |
1650 | dsl_scan_t *scn = spa->spa_dsl_pool ? spa->spa_dsl_pool->dp_scan : NULL; | |
1651 | ||
1652 | if (scn == NULL || scn->scn_phys.scn_func == POOL_SCAN_NONE) | |
1653 | return (ENOENT); | |
1654 | bzero(ps, sizeof (pool_scan_stat_t)); | |
1655 | ||
1656 | /* data stored on disk */ | |
1657 | ps->pss_func = scn->scn_phys.scn_func; | |
1658 | ps->pss_start_time = scn->scn_phys.scn_start_time; | |
1659 | ps->pss_end_time = scn->scn_phys.scn_end_time; | |
1660 | ps->pss_to_examine = scn->scn_phys.scn_to_examine; | |
1661 | ps->pss_examined = scn->scn_phys.scn_examined; | |
1662 | ps->pss_to_process = scn->scn_phys.scn_to_process; | |
1663 | ps->pss_processed = scn->scn_phys.scn_processed; | |
1664 | ps->pss_errors = scn->scn_phys.scn_errors; | |
1665 | ps->pss_state = scn->scn_phys.scn_state; | |
1666 | ||
1667 | /* data not stored on disk */ | |
1668 | ps->pss_pass_start = spa->spa_scan_pass_start; | |
1669 | ps->pss_pass_exam = spa->spa_scan_pass_exam; | |
1670 | ||
1671 | return (0); | |
1672 | } |