Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/spa.c @ 4070:4390ea390a1e
6386594 zdb message should be clearer when failing for lack of permissions
| author | mc142369 |
|---|---|
| date | Thu, 19 Apr 2007 15:50:31 -0700 |
| parents | 6674f5d79069 |
| children | ad95fd86760b |
| rev | line source |
|---|---|
| 789 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
| 1544 | 5 * Common Development and Distribution License (the "License"). |
| 6 * You may not use this file except in compliance with the License. | |
| 789 | 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 */ | |
| 2082 | 21 |
| 789 | 22 /* |
|
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23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
| 789 | 24 * Use is subject to license terms. |
| 25 */ | |
| 26 | |
| 27 #pragma ident "%Z%%M% %I% %E% SMI" | |
| 28 | |
| 29 /* | |
| 30 * This file contains all the routines used when modifying on-disk SPA state. | |
| 31 * This includes opening, importing, destroying, exporting a pool, and syncing a | |
| 32 * pool. | |
| 33 */ | |
| 34 | |
| 35 #include <sys/zfs_context.h> | |
| 1544 | 36 #include <sys/fm/fs/zfs.h> |
| 789 | 37 #include <sys/spa_impl.h> |
| 38 #include <sys/zio.h> | |
| 39 #include <sys/zio_checksum.h> | |
| 40 #include <sys/zio_compress.h> | |
| 41 #include <sys/dmu.h> | |
| 42 #include <sys/dmu_tx.h> | |
| 43 #include <sys/zap.h> | |
| 44 #include <sys/zil.h> | |
| 45 #include <sys/vdev_impl.h> | |
| 46 #include <sys/metaslab.h> | |
| 47 #include <sys/uberblock_impl.h> | |
| 48 #include <sys/txg.h> | |
| 49 #include <sys/avl.h> | |
| 50 #include <sys/dmu_traverse.h> | |
| 3912 | 51 #include <sys/dmu_objset.h> |
| 789 | 52 #include <sys/unique.h> |
| 53 #include <sys/dsl_pool.h> | |
| 3912 | 54 #include <sys/dsl_dataset.h> |
| 789 | 55 #include <sys/dsl_dir.h> |
| 56 #include <sys/dsl_prop.h> | |
| 3912 | 57 #include <sys/dsl_synctask.h> |
| 789 | 58 #include <sys/fs/zfs.h> |
| 59 #include <sys/callb.h> | |
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60 #include <sys/systeminfo.h> |
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61 #include <sys/sunddi.h> |
| 789 | 62 |
| 2986 | 63 int zio_taskq_threads = 8; |
| 64 | |
| 789 | 65 /* |
| 66 * ========================================================================== | |
| 67 * SPA state manipulation (open/create/destroy/import/export) | |
| 68 * ========================================================================== | |
| 69 */ | |
| 70 | |
| 1544 | 71 static int |
| 72 spa_error_entry_compare(const void *a, const void *b) | |
| 73 { | |
| 74 spa_error_entry_t *sa = (spa_error_entry_t *)a; | |
| 75 spa_error_entry_t *sb = (spa_error_entry_t *)b; | |
| 76 int ret; | |
| 77 | |
| 78 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, | |
| 79 sizeof (zbookmark_t)); | |
| 80 | |
| 81 if (ret < 0) | |
| 82 return (-1); | |
| 83 else if (ret > 0) | |
| 84 return (1); | |
| 85 else | |
| 86 return (0); | |
| 87 } | |
| 88 | |
| 89 /* | |
| 90 * Utility function which retrieves copies of the current logs and | |
| 91 * re-initializes them in the process. | |
| 92 */ | |
| 93 void | |
| 94 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) | |
| 95 { | |
| 96 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); | |
| 97 | |
| 98 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); | |
| 99 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); | |
| 100 | |
| 101 avl_create(&spa->spa_errlist_scrub, | |
| 102 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 103 offsetof(spa_error_entry_t, se_avl)); | |
| 104 avl_create(&spa->spa_errlist_last, | |
| 105 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 106 offsetof(spa_error_entry_t, se_avl)); | |
| 107 } | |
| 108 | |
| 789 | 109 /* |
| 110 * Activate an uninitialized pool. | |
| 111 */ | |
| 112 static void | |
| 113 spa_activate(spa_t *spa) | |
| 114 { | |
| 115 int t; | |
| 116 | |
| 117 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); | |
| 118 | |
| 119 spa->spa_state = POOL_STATE_ACTIVE; | |
| 120 | |
| 121 spa->spa_normal_class = metaslab_class_create(); | |
| 122 | |
| 123 for (t = 0; t < ZIO_TYPES; t++) { | |
| 124 spa->spa_zio_issue_taskq[t] = taskq_create("spa_zio_issue", | |
| 2986 | 125 zio_taskq_threads, maxclsyspri, 50, INT_MAX, |
| 789 | 126 TASKQ_PREPOPULATE); |
| 127 spa->spa_zio_intr_taskq[t] = taskq_create("spa_zio_intr", | |
| 2986 | 128 zio_taskq_threads, maxclsyspri, 50, INT_MAX, |
| 789 | 129 TASKQ_PREPOPULATE); |
| 130 } | |
| 131 | |
| 132 rw_init(&spa->spa_traverse_lock, NULL, RW_DEFAULT, NULL); | |
| 133 | |
| 2856 | 134 mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL); |
| 135 mutex_init(&spa->spa_config_cache_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 136 mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 137 mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 138 mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 139 mutex_init(&spa->spa_config_lock.scl_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 140 mutex_init(&spa->spa_sync_bplist.bpl_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 2926 | 141 mutex_init(&spa->spa_history_lock, NULL, MUTEX_DEFAULT, NULL); |
| 3912 | 142 mutex_init(&spa->spa_props_lock, NULL, MUTEX_DEFAULT, NULL); |
| 2856 | 143 |
| 789 | 144 list_create(&spa->spa_dirty_list, sizeof (vdev_t), |
| 145 offsetof(vdev_t, vdev_dirty_node)); | |
| 146 | |
| 147 txg_list_create(&spa->spa_vdev_txg_list, | |
| 148 offsetof(struct vdev, vdev_txg_node)); | |
| 1544 | 149 |
| 150 avl_create(&spa->spa_errlist_scrub, | |
| 151 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 152 offsetof(spa_error_entry_t, se_avl)); | |
| 153 avl_create(&spa->spa_errlist_last, | |
| 154 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 155 offsetof(spa_error_entry_t, se_avl)); | |
| 789 | 156 } |
| 157 | |
| 158 /* | |
| 159 * Opposite of spa_activate(). | |
| 160 */ | |
| 161 static void | |
| 162 spa_deactivate(spa_t *spa) | |
| 163 { | |
| 164 int t; | |
| 165 | |
| 166 ASSERT(spa->spa_sync_on == B_FALSE); | |
| 167 ASSERT(spa->spa_dsl_pool == NULL); | |
| 168 ASSERT(spa->spa_root_vdev == NULL); | |
| 169 | |
| 170 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); | |
| 171 | |
| 172 txg_list_destroy(&spa->spa_vdev_txg_list); | |
| 173 | |
| 174 list_destroy(&spa->spa_dirty_list); | |
| 175 | |
| 176 rw_destroy(&spa->spa_traverse_lock); | |
| 177 | |
| 178 for (t = 0; t < ZIO_TYPES; t++) { | |
| 179 taskq_destroy(spa->spa_zio_issue_taskq[t]); | |
| 180 taskq_destroy(spa->spa_zio_intr_taskq[t]); | |
| 181 spa->spa_zio_issue_taskq[t] = NULL; | |
| 182 spa->spa_zio_intr_taskq[t] = NULL; | |
| 183 } | |
| 184 | |
| 185 metaslab_class_destroy(spa->spa_normal_class); | |
| 186 spa->spa_normal_class = NULL; | |
| 187 | |
| 1544 | 188 /* |
| 189 * If this was part of an import or the open otherwise failed, we may | |
| 190 * still have errors left in the queues. Empty them just in case. | |
| 191 */ | |
| 192 spa_errlog_drain(spa); | |
| 193 | |
| 194 avl_destroy(&spa->spa_errlist_scrub); | |
| 195 avl_destroy(&spa->spa_errlist_last); | |
| 196 | |
| 789 | 197 spa->spa_state = POOL_STATE_UNINITIALIZED; |
| 198 } | |
| 199 | |
| 200 /* | |
| 201 * Verify a pool configuration, and construct the vdev tree appropriately. This | |
| 202 * will create all the necessary vdevs in the appropriate layout, with each vdev | |
| 203 * in the CLOSED state. This will prep the pool before open/creation/import. | |
| 204 * All vdev validation is done by the vdev_alloc() routine. | |
| 205 */ | |
| 2082 | 206 static int |
| 207 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, | |
| 208 uint_t id, int atype) | |
| 789 | 209 { |
| 210 nvlist_t **child; | |
| 211 uint_t c, children; | |
| 2082 | 212 int error; |
| 213 | |
| 214 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) | |
| 215 return (error); | |
| 216 | |
| 217 if ((*vdp)->vdev_ops->vdev_op_leaf) | |
| 218 return (0); | |
| 789 | 219 |
| 220 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
| 221 &child, &children) != 0) { | |
| 2082 | 222 vdev_free(*vdp); |
| 223 *vdp = NULL; | |
| 224 return (EINVAL); | |
| 789 | 225 } |
| 226 | |
| 227 for (c = 0; c < children; c++) { | |
| 2082 | 228 vdev_t *vd; |
| 229 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, | |
| 230 atype)) != 0) { | |
| 231 vdev_free(*vdp); | |
| 232 *vdp = NULL; | |
| 233 return (error); | |
| 789 | 234 } |
| 235 } | |
| 236 | |
| 2082 | 237 ASSERT(*vdp != NULL); |
| 238 | |
| 239 return (0); | |
| 789 | 240 } |
| 241 | |
| 242 /* | |
| 243 * Opposite of spa_load(). | |
| 244 */ | |
| 245 static void | |
| 246 spa_unload(spa_t *spa) | |
| 247 { | |
| 2082 | 248 int i; |
| 249 | |
| 789 | 250 /* |
| 1544 | 251 * Stop async tasks. |
| 252 */ | |
| 253 spa_async_suspend(spa); | |
| 254 | |
| 255 /* | |
| 789 | 256 * Stop syncing. |
| 257 */ | |
| 258 if (spa->spa_sync_on) { | |
| 259 txg_sync_stop(spa->spa_dsl_pool); | |
| 260 spa->spa_sync_on = B_FALSE; | |
| 261 } | |
| 262 | |
| 263 /* | |
| 264 * Wait for any outstanding prefetch I/O to complete. | |
| 265 */ | |
| 1544 | 266 spa_config_enter(spa, RW_WRITER, FTAG); |
| 267 spa_config_exit(spa, FTAG); | |
| 789 | 268 |
| 269 /* | |
| 270 * Close the dsl pool. | |
| 271 */ | |
| 272 if (spa->spa_dsl_pool) { | |
| 273 dsl_pool_close(spa->spa_dsl_pool); | |
| 274 spa->spa_dsl_pool = NULL; | |
| 275 } | |
| 276 | |
| 277 /* | |
| 278 * Close all vdevs. | |
| 279 */ | |
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280 if (spa->spa_root_vdev) |
| 789 | 281 vdev_free(spa->spa_root_vdev); |
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282 ASSERT(spa->spa_root_vdev == NULL); |
| 1544 | 283 |
| 2082 | 284 for (i = 0; i < spa->spa_nspares; i++) |
| 285 vdev_free(spa->spa_spares[i]); | |
| 286 if (spa->spa_spares) { | |
| 287 kmem_free(spa->spa_spares, spa->spa_nspares * sizeof (void *)); | |
| 288 spa->spa_spares = NULL; | |
| 289 } | |
| 290 if (spa->spa_sparelist) { | |
| 291 nvlist_free(spa->spa_sparelist); | |
| 292 spa->spa_sparelist = NULL; | |
| 293 } | |
| 294 | |
| 1544 | 295 spa->spa_async_suspended = 0; |
| 789 | 296 } |
| 297 | |
| 298 /* | |
| 2082 | 299 * Load (or re-load) the current list of vdevs describing the active spares for |
| 300 * this pool. When this is called, we have some form of basic information in | |
| 301 * 'spa_sparelist'. We parse this into vdevs, try to open them, and then | |
| 302 * re-generate a more complete list including status information. | |
| 303 */ | |
| 304 static void | |
| 305 spa_load_spares(spa_t *spa) | |
| 306 { | |
| 307 nvlist_t **spares; | |
| 308 uint_t nspares; | |
| 309 int i; | |
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310 vdev_t *vd, *tvd; |
| 2082 | 311 |
| 312 /* | |
| 313 * First, close and free any existing spare vdevs. | |
| 314 */ | |
| 315 for (i = 0; i < spa->spa_nspares; i++) { | |
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316 vd = spa->spa_spares[i]; |
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317 |
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318 /* Undo the call to spa_activate() below */ |
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319 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid)) != NULL && |
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320 tvd->vdev_isspare) |
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321 spa_spare_remove(tvd); |
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322 vdev_close(vd); |
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323 vdev_free(vd); |
| 2082 | 324 } |
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325 |
| 2082 | 326 if (spa->spa_spares) |
| 327 kmem_free(spa->spa_spares, spa->spa_nspares * sizeof (void *)); | |
| 328 | |
| 329 if (spa->spa_sparelist == NULL) | |
| 330 nspares = 0; | |
| 331 else | |
| 332 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 333 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 334 | |
| 335 spa->spa_nspares = (int)nspares; | |
| 336 spa->spa_spares = NULL; | |
| 337 | |
| 338 if (nspares == 0) | |
| 339 return; | |
| 340 | |
| 341 /* | |
| 342 * Construct the array of vdevs, opening them to get status in the | |
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343 * process. For each spare, there is potentially two different vdev_t |
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344 * structures associated with it: one in the list of spares (used only |
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345 * for basic validation purposes) and one in the active vdev |
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346 * configuration (if it's spared in). During this phase we open and |
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347 * validate each vdev on the spare list. If the vdev also exists in the |
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348 * active configuration, then we also mark this vdev as an active spare. |
| 2082 | 349 */ |
| 350 spa->spa_spares = kmem_alloc(nspares * sizeof (void *), KM_SLEEP); | |
| 351 for (i = 0; i < spa->spa_nspares; i++) { | |
| 352 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 353 VDEV_ALLOC_SPARE) == 0); | |
| 354 ASSERT(vd != NULL); | |
| 355 | |
| 356 spa->spa_spares[i] = vd; | |
| 357 | |
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358 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid)) != NULL) { |
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359 if (!tvd->vdev_isspare) |
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360 spa_spare_add(tvd); |
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361 |
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362 /* |
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363 * We only mark the spare active if we were successfully |
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364 * able to load the vdev. Otherwise, importing a pool |
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365 * with a bad active spare would result in strange |
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366 * behavior, because multiple pool would think the spare |
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367 * is actively in use. |
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368 * |
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369 * There is a vulnerability here to an equally bizarre |
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370 * circumstance, where a dead active spare is later |
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371 * brought back to life (onlined or otherwise). Given |
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372 * the rarity of this scenario, and the extra complexity |
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373 * it adds, we ignore the possibility. |
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374 */ |
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375 if (!vdev_is_dead(tvd)) |
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376 spa_spare_activate(tvd); |
|
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|
377 } |
|
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|
378 |
| 2082 | 379 if (vdev_open(vd) != 0) |
| 380 continue; | |
| 381 | |
| 382 vd->vdev_top = vd; | |
| 383 (void) vdev_validate_spare(vd); | |
| 384 } | |
| 385 | |
| 386 /* | |
| 387 * Recompute the stashed list of spares, with status information | |
| 388 * this time. | |
| 389 */ | |
| 390 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 391 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 392 | |
| 393 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), KM_SLEEP); | |
| 394 for (i = 0; i < spa->spa_nspares; i++) | |
| 395 spares[i] = vdev_config_generate(spa, spa->spa_spares[i], | |
| 396 B_TRUE, B_TRUE); | |
| 397 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 398 spares, spa->spa_nspares) == 0); | |
| 399 for (i = 0; i < spa->spa_nspares; i++) | |
| 400 nvlist_free(spares[i]); | |
| 401 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 402 } | |
| 403 | |
| 404 static int | |
| 405 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) | |
| 406 { | |
| 407 dmu_buf_t *db; | |
| 408 char *packed = NULL; | |
| 409 size_t nvsize = 0; | |
| 410 int error; | |
| 411 *value = NULL; | |
| 412 | |
| 413 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 414 nvsize = *(uint64_t *)db->db_data; | |
| 415 dmu_buf_rele(db, FTAG); | |
| 416 | |
| 417 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 418 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed); | |
| 419 if (error == 0) | |
| 420 error = nvlist_unpack(packed, nvsize, value, 0); | |
| 421 kmem_free(packed, nvsize); | |
| 422 | |
| 423 return (error); | |
| 424 } | |
| 425 | |
| 426 /* | |
| 789 | 427 * Load an existing storage pool, using the pool's builtin spa_config as a |
| 1544 | 428 * source of configuration information. |
| 789 | 429 */ |
| 430 static int | |
| 1544 | 431 spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) |
| 789 | 432 { |
| 433 int error = 0; | |
| 434 nvlist_t *nvroot = NULL; | |
| 435 vdev_t *rvd; | |
| 436 uberblock_t *ub = &spa->spa_uberblock; | |
|
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437 uint64_t config_cache_txg = spa->spa_config_txg; |
| 789 | 438 uint64_t pool_guid; |
| 2082 | 439 uint64_t version; |
| 789 | 440 zio_t *zio; |
| 441 | |
| 1544 | 442 spa->spa_load_state = state; |
|
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|
443 |
| 789 | 444 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || |
| 1733 | 445 nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) { |
| 1544 | 446 error = EINVAL; |
| 447 goto out; | |
| 448 } | |
| 789 | 449 |
| 2082 | 450 /* |
| 451 * Versioning wasn't explicitly added to the label until later, so if | |
| 452 * it's not present treat it as the initial version. | |
| 453 */ | |
| 454 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, &version) != 0) | |
| 455 version = ZFS_VERSION_INITIAL; | |
| 456 | |
| 1733 | 457 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, |
| 458 &spa->spa_config_txg); | |
| 459 | |
|
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|
460 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && |
| 1544 | 461 spa_guid_exists(pool_guid, 0)) { |
| 462 error = EEXIST; | |
| 463 goto out; | |
| 464 } | |
| 789 | 465 |
|
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466 spa->spa_load_guid = pool_guid; |
|
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467 |
| 789 | 468 /* |
| 2082 | 469 * Parse the configuration into a vdev tree. We explicitly set the |
| 470 * value that will be returned by spa_version() since parsing the | |
| 471 * configuration requires knowing the version number. | |
| 789 | 472 */ |
| 1544 | 473 spa_config_enter(spa, RW_WRITER, FTAG); |
| 2082 | 474 spa->spa_ubsync.ub_version = version; |
| 475 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_LOAD); | |
| 1544 | 476 spa_config_exit(spa, FTAG); |
| 789 | 477 |
| 2082 | 478 if (error != 0) |
| 1544 | 479 goto out; |
| 789 | 480 |
|
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|
481 ASSERT(spa->spa_root_vdev == rvd); |
| 789 | 482 ASSERT(spa_guid(spa) == pool_guid); |
| 483 | |
| 484 /* | |
| 485 * Try to open all vdevs, loading each label in the process. | |
| 486 */ | |
|
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487 error = vdev_open(rvd); |
|
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|
488 if (error != 0) |
| 1544 | 489 goto out; |
| 789 | 490 |
| 491 /* | |
|
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|
492 * Validate the labels for all leaf vdevs. We need to grab the config |
|
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493 * lock because all label I/O is done with the ZIO_FLAG_CONFIG_HELD |
|
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|
494 * flag. |
|
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|
495 */ |
|
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|
496 spa_config_enter(spa, RW_READER, FTAG); |
|
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497 error = vdev_validate(rvd); |
|
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498 spa_config_exit(spa, FTAG); |
|
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499 |
|
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500 if (error != 0) |
|
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501 goto out; |
|
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|
502 |
|
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503 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
|
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504 error = ENXIO; |
|
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|
505 goto out; |
|
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|
506 } |
|
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|
507 |
|
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|
508 /* |
| 789 | 509 * Find the best uberblock. |
| 510 */ | |
| 511 bzero(ub, sizeof (uberblock_t)); | |
| 512 | |
| 513 zio = zio_root(spa, NULL, NULL, | |
| 514 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); | |
| 515 vdev_uberblock_load(zio, rvd, ub); | |
| 516 error = zio_wait(zio); | |
| 517 | |
| 518 /* | |
| 519 * If we weren't able to find a single valid uberblock, return failure. | |
| 520 */ | |
| 521 if (ub->ub_txg == 0) { | |
| 1760 | 522 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 523 VDEV_AUX_CORRUPT_DATA); | |
| 1544 | 524 error = ENXIO; |
| 525 goto out; | |
| 526 } | |
| 527 | |
| 528 /* | |
| 529 * If the pool is newer than the code, we can't open it. | |
| 530 */ | |
| 1760 | 531 if (ub->ub_version > ZFS_VERSION) { |
| 532 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 533 VDEV_AUX_VERSION_NEWER); | |
| 1544 | 534 error = ENOTSUP; |
| 535 goto out; | |
| 789 | 536 } |
| 537 | |
| 538 /* | |
| 539 * If the vdev guid sum doesn't match the uberblock, we have an | |
| 540 * incomplete configuration. | |
| 541 */ | |
| 1732 | 542 if (rvd->vdev_guid_sum != ub->ub_guid_sum && mosconfig) { |
| 1544 | 543 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 544 VDEV_AUX_BAD_GUID_SUM); | |
| 545 error = ENXIO; | |
| 546 goto out; | |
| 789 | 547 } |
| 548 | |
| 549 /* | |
| 550 * Initialize internal SPA structures. | |
| 551 */ | |
| 552 spa->spa_state = POOL_STATE_ACTIVE; | |
| 553 spa->spa_ubsync = spa->spa_uberblock; | |
| 554 spa->spa_first_txg = spa_last_synced_txg(spa) + 1; | |
| 1544 | 555 error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool); |
| 556 if (error) { | |
| 557 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 558 VDEV_AUX_CORRUPT_DATA); | |
| 559 goto out; | |
| 560 } | |
| 789 | 561 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; |
| 562 | |
| 1544 | 563 if (zap_lookup(spa->spa_meta_objset, |
| 789 | 564 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 565 sizeof (uint64_t), 1, &spa->spa_config_object) != 0) { |
| 566 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 567 VDEV_AUX_CORRUPT_DATA); | |
| 568 error = EIO; | |
| 569 goto out; | |
| 570 } | |
| 789 | 571 |
| 572 if (!mosconfig) { | |
| 2082 | 573 nvlist_t *newconfig; |
|
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|
574 uint64_t hostid; |
| 2082 | 575 |
| 576 if (load_nvlist(spa, spa->spa_config_object, &newconfig) != 0) { | |
| 1544 | 577 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 578 VDEV_AUX_CORRUPT_DATA); | |
| 579 error = EIO; | |
| 580 goto out; | |
| 581 } | |
| 789 | 582 |
|
3975
6674f5d79069
6282725 hostname/hostid should be stored in the label
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diff
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|
583 if (nvlist_lookup_uint64(newconfig, ZPOOL_CONFIG_HOSTID, |
|
6674f5d79069
6282725 hostname/hostid should be stored in the label
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diff
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|
584 &hostid) == 0) { |
|
6674f5d79069
6282725 hostname/hostid should be stored in the label
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|
585 char *hostname; |
|
6674f5d79069
6282725 hostname/hostid should be stored in the label
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|
586 unsigned long myhostid = 0; |
|
6674f5d79069
6282725 hostname/hostid should be stored in the label
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|
587 |
|
6674f5d79069
6282725 hostname/hostid should be stored in the label
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|
588 VERIFY(nvlist_lookup_string(newconfig, |
|
6674f5d79069
6282725 hostname/hostid should be stored in the label
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diff
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|
589 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); |
|
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6282725 hostname/hostid should be stored in the label
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|
590 |
|
6674f5d79069
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|
591 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); |
|
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6282725 hostname/hostid should be stored in the label
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|
592 if ((unsigned long)hostid != myhostid) { |
|
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|
593 cmn_err(CE_WARN, "pool '%s' could not be " |
|
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6282725 hostname/hostid should be stored in the label
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diff
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|
594 "loaded as it was last accessed by " |
|
6674f5d79069
6282725 hostname/hostid should be stored in the label
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diff
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|
595 "another system (host: %s hostid: 0x%lx). " |
|
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6282725 hostname/hostid should be stored in the label
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|
596 "See: http://www.sun.com/msg/ZFS-8000-EY", |
|
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|
597 spa->spa_name, hostname, |
|
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6282725 hostname/hostid should be stored in the label
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|
598 (unsigned long)hostid); |
|
6674f5d79069
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|
599 error = EBADF; |
|
6674f5d79069
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|
600 goto out; |
|
6674f5d79069
6282725 hostname/hostid should be stored in the label
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|
601 } |
|
6674f5d79069
6282725 hostname/hostid should be stored in the label
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|
602 } |
|
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|
603 |
| 789 | 604 spa_config_set(spa, newconfig); |
| 605 spa_unload(spa); | |
| 606 spa_deactivate(spa); | |
| 607 spa_activate(spa); | |
| 608 | |
| 1544 | 609 return (spa_load(spa, newconfig, state, B_TRUE)); |
| 610 } | |
| 611 | |
| 612 if (zap_lookup(spa->spa_meta_objset, | |
| 613 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, | |
| 614 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj) != 0) { | |
| 615 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 616 VDEV_AUX_CORRUPT_DATA); | |
| 617 error = EIO; | |
| 618 goto out; | |
| 789 | 619 } |
| 620 | |
| 1544 | 621 /* |
| 2082 | 622 * Load the bit that tells us to use the new accounting function |
| 623 * (raid-z deflation). If we have an older pool, this will not | |
| 624 * be present. | |
| 625 */ | |
| 626 error = zap_lookup(spa->spa_meta_objset, | |
| 627 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 628 sizeof (uint64_t), 1, &spa->spa_deflate); | |
| 629 if (error != 0 && error != ENOENT) { | |
| 630 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 631 VDEV_AUX_CORRUPT_DATA); | |
| 632 error = EIO; | |
| 633 goto out; | |
| 634 } | |
| 635 | |
| 636 /* | |
| 1544 | 637 * Load the persistent error log. If we have an older pool, this will |
| 638 * not be present. | |
| 639 */ | |
| 640 error = zap_lookup(spa->spa_meta_objset, | |
| 641 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_LAST, | |
| 642 sizeof (uint64_t), 1, &spa->spa_errlog_last); | |
|
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|
643 if (error != 0 && error != ENOENT) { |
| 1544 | 644 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 645 VDEV_AUX_CORRUPT_DATA); | |
| 646 error = EIO; | |
| 647 goto out; | |
| 648 } | |
| 649 | |
| 650 error = zap_lookup(spa->spa_meta_objset, | |
| 651 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_SCRUB, | |
| 652 sizeof (uint64_t), 1, &spa->spa_errlog_scrub); | |
| 653 if (error != 0 && error != ENOENT) { | |
| 654 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 655 VDEV_AUX_CORRUPT_DATA); | |
| 656 error = EIO; | |
| 657 goto out; | |
| 658 } | |
| 789 | 659 |
| 660 /* | |
| 2926 | 661 * Load the history object. If we have an older pool, this |
| 662 * will not be present. | |
| 663 */ | |
| 664 error = zap_lookup(spa->spa_meta_objset, | |
| 665 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_HISTORY, | |
| 666 sizeof (uint64_t), 1, &spa->spa_history); | |
| 667 if (error != 0 && error != ENOENT) { | |
| 668 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 669 VDEV_AUX_CORRUPT_DATA); | |
| 670 error = EIO; | |
| 671 goto out; | |
| 672 } | |
| 673 | |
| 674 /* | |
| 2082 | 675 * Load any hot spares for this pool. |
| 676 */ | |
| 677 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, | |
| 678 DMU_POOL_SPARES, sizeof (uint64_t), 1, &spa->spa_spares_object); | |
| 679 if (error != 0 && error != ENOENT) { | |
| 680 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 681 VDEV_AUX_CORRUPT_DATA); | |
| 682 error = EIO; | |
| 683 goto out; | |
| 684 } | |
| 685 if (error == 0) { | |
| 686 ASSERT(spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 687 if (load_nvlist(spa, spa->spa_spares_object, | |
| 688 &spa->spa_sparelist) != 0) { | |
| 689 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 690 VDEV_AUX_CORRUPT_DATA); | |
| 691 error = EIO; | |
| 692 goto out; | |
| 693 } | |
| 694 | |
| 695 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 696 spa_load_spares(spa); | |
| 697 spa_config_exit(spa, FTAG); | |
| 698 } | |
| 699 | |
| 3912 | 700 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, |
| 701 DMU_POOL_PROPS, sizeof (uint64_t), 1, &spa->spa_pool_props_object); | |
| 702 | |
| 703 if (error && error != ENOENT) { | |
| 704 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 705 VDEV_AUX_CORRUPT_DATA); | |
| 706 error = EIO; | |
| 707 goto out; | |
| 708 } | |
| 709 | |
| 710 if (error == 0) { | |
| 711 (void) zap_lookup(spa->spa_meta_objset, | |
| 712 spa->spa_pool_props_object, | |
| 713 zpool_prop_to_name(ZFS_PROP_BOOTFS), | |
| 714 sizeof (uint64_t), 1, &spa->spa_bootfs); | |
| 715 } | |
| 716 | |
| 2082 | 717 /* |
|
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628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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diff
changeset
|
718 * Load the vdev state for all toplevel vdevs. |
| 789 | 719 */ |
|
1986
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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|
720 vdev_load(rvd); |
| 789 | 721 |
| 722 /* | |
| 723 * Propagate the leaf DTLs we just loaded all the way up the tree. | |
| 724 */ | |
| 1544 | 725 spa_config_enter(spa, RW_WRITER, FTAG); |
| 789 | 726 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); |
| 1544 | 727 spa_config_exit(spa, FTAG); |
| 789 | 728 |
| 729 /* | |
| 730 * Check the state of the root vdev. If it can't be opened, it | |
| 731 * indicates one or more toplevel vdevs are faulted. | |
| 732 */ | |
| 1544 | 733 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
| 734 error = ENXIO; | |
| 735 goto out; | |
| 736 } | |
| 789 | 737 |
| 1544 | 738 if ((spa_mode & FWRITE) && state != SPA_LOAD_TRYIMPORT) { |
|
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739 dmu_tx_t *tx; |
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740 int need_update = B_FALSE; |
|
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741 int c; |
|
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742 |
|
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743 /* |
|
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744 * Claim log blocks that haven't been committed yet. |
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745 * This must all happen in a single txg. |
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746 */ |
|
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747 tx = dmu_tx_create_assigned(spa_get_dsl(spa), |
| 789 | 748 spa_first_txg(spa)); |
| 2417 | 749 (void) dmu_objset_find(spa->spa_name, |
| 750 zil_claim, tx, DS_FIND_CHILDREN); | |
| 789 | 751 dmu_tx_commit(tx); |
| 752 | |
| 753 spa->spa_sync_on = B_TRUE; | |
| 754 txg_sync_start(spa->spa_dsl_pool); | |
| 755 | |
| 756 /* | |
| 757 * Wait for all claims to sync. | |
| 758 */ | |
| 759 txg_wait_synced(spa->spa_dsl_pool, 0); | |
|
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760 |
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761 /* |
|
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762 * If the config cache is stale, or we have uninitialized |
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763 * metaslabs (see spa_vdev_add()), then update the config. |
|
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764 */ |
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765 if (config_cache_txg != spa->spa_config_txg || |
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766 state == SPA_LOAD_IMPORT) |
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767 need_update = B_TRUE; |
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768 |
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769 for (c = 0; c < rvd->vdev_children; c++) |
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770 if (rvd->vdev_child[c]->vdev_ms_array == 0) |
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771 need_update = B_TRUE; |
|
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772 |
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773 /* |
|
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774 * Update the config cache asychronously in case we're the |
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775 * root pool, in which case the config cache isn't writable yet. |
|
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776 */ |
|
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777 if (need_update) |
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778 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); |
| 789 | 779 } |
| 780 | |
| 1544 | 781 error = 0; |
| 782 out: | |
| 2082 | 783 if (error && error != EBADF) |
| 1544 | 784 zfs_ereport_post(FM_EREPORT_ZFS_POOL, spa, NULL, NULL, 0, 0); |
| 785 spa->spa_load_state = SPA_LOAD_NONE; | |
| 786 spa->spa_ena = 0; | |
| 787 | |
| 788 return (error); | |
| 789 | 789 } |
| 790 | |
| 791 /* | |
| 792 * Pool Open/Import | |
| 793 * | |
| 794 * The import case is identical to an open except that the configuration is sent | |
| 795 * down from userland, instead of grabbed from the configuration cache. For the | |
| 796 * case of an open, the pool configuration will exist in the | |
| 797 * POOL_STATE_UNITIALIZED state. | |
| 798 * | |
| 799 * The stats information (gen/count/ustats) is used to gather vdev statistics at | |
| 800 * the same time open the pool, without having to keep around the spa_t in some | |
| 801 * ambiguous state. | |
| 802 */ | |
| 803 static int | |
| 804 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) | |
| 805 { | |
| 806 spa_t *spa; | |
| 807 int error; | |
| 808 int loaded = B_FALSE; | |
| 809 int locked = B_FALSE; | |
| 810 | |
| 811 *spapp = NULL; | |
| 812 | |
| 813 /* | |
| 814 * As disgusting as this is, we need to support recursive calls to this | |
| 815 * function because dsl_dir_open() is called during spa_load(), and ends | |
| 816 * up calling spa_open() again. The real fix is to figure out how to | |
| 817 * avoid dsl_dir_open() calling this in the first place. | |
| 818 */ | |
| 819 if (mutex_owner(&spa_namespace_lock) != curthread) { | |
| 820 mutex_enter(&spa_namespace_lock); | |
| 821 locked = B_TRUE; | |
| 822 } | |
| 823 | |
| 824 if ((spa = spa_lookup(pool)) == NULL) { | |
| 825 if (locked) | |
| 826 mutex_exit(&spa_namespace_lock); | |
| 827 return (ENOENT); | |
| 828 } | |
| 829 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { | |
| 830 | |
| 831 spa_activate(spa); | |
| 832 | |
|
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833 error = spa_load(spa, spa->spa_config, SPA_LOAD_OPEN, B_FALSE); |
| 789 | 834 |
| 835 if (error == EBADF) { | |
| 836 /* | |
|
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837 * If vdev_validate() returns failure (indicated by |
|
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838 * EBADF), it indicates that one of the vdevs indicates |
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839 * that the pool has been exported or destroyed. If |
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840 * this is the case, the config cache is out of sync and |
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841 * we should remove the pool from the namespace. |
| 789 | 842 */ |
| 2082 | 843 zfs_post_ok(spa, NULL); |
| 789 | 844 spa_unload(spa); |
| 845 spa_deactivate(spa); | |
| 846 spa_remove(spa); | |
| 847 spa_config_sync(); | |
| 848 if (locked) | |
| 849 mutex_exit(&spa_namespace_lock); | |
| 850 return (ENOENT); | |
| 1544 | 851 } |
| 852 | |
| 853 if (error) { | |
| 789 | 854 /* |
| 855 * We can't open the pool, but we still have useful | |
| 856 * information: the state of each vdev after the | |
| 857 * attempted vdev_open(). Return this to the user. | |
| 858 */ | |
|
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859 if (config != NULL && spa->spa_root_vdev != NULL) { |
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860 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 861 *config = spa_config_generate(spa, NULL, -1ULL, |
| 862 B_TRUE); | |
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863 spa_config_exit(spa, FTAG); |
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864 } |
| 789 | 865 spa_unload(spa); |
| 866 spa_deactivate(spa); | |
| 1544 | 867 spa->spa_last_open_failed = B_TRUE; |
| 789 | 868 if (locked) |
| 869 mutex_exit(&spa_namespace_lock); | |
| 870 *spapp = NULL; | |
| 871 return (error); | |
| 1544 | 872 } else { |
| 873 zfs_post_ok(spa, NULL); | |
| 874 spa->spa_last_open_failed = B_FALSE; | |
| 789 | 875 } |
| 876 | |
| 877 loaded = B_TRUE; | |
| 878 } | |
| 879 | |
| 880 spa_open_ref(spa, tag); | |
| 881 if (locked) | |
| 882 mutex_exit(&spa_namespace_lock); | |
| 883 | |
| 884 *spapp = spa; | |
| 885 | |
| 886 if (config != NULL) { | |
| 1544 | 887 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 888 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
| 1544 | 889 spa_config_exit(spa, FTAG); |
| 789 | 890 } |
| 891 | |
| 892 /* | |
| 893 * If we just loaded the pool, resilver anything that's out of date. | |
| 894 */ | |
| 895 if (loaded && (spa_mode & FWRITE)) | |
| 896 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 897 | |
| 898 return (0); | |
| 899 } | |
| 900 | |
| 901 int | |
| 902 spa_open(const char *name, spa_t **spapp, void *tag) | |
| 903 { | |
| 904 return (spa_open_common(name, spapp, tag, NULL)); | |
| 905 } | |
| 906 | |
| 1544 | 907 /* |
| 908 * Lookup the given spa_t, incrementing the inject count in the process, | |
| 909 * preventing it from being exported or destroyed. | |
| 910 */ | |
| 911 spa_t * | |
| 912 spa_inject_addref(char *name) | |
| 913 { | |
| 914 spa_t *spa; | |
| 915 | |
| 916 mutex_enter(&spa_namespace_lock); | |
| 917 if ((spa = spa_lookup(name)) == NULL) { | |
| 918 mutex_exit(&spa_namespace_lock); | |
| 919 return (NULL); | |
| 920 } | |
| 921 spa->spa_inject_ref++; | |
| 922 mutex_exit(&spa_namespace_lock); | |
| 923 | |
| 924 return (spa); | |
| 925 } | |
| 926 | |
| 927 void | |
| 928 spa_inject_delref(spa_t *spa) | |
| 929 { | |
| 930 mutex_enter(&spa_namespace_lock); | |
| 931 spa->spa_inject_ref--; | |
| 932 mutex_exit(&spa_namespace_lock); | |
| 933 } | |
| 934 | |
| 2082 | 935 static void |
| 936 spa_add_spares(spa_t *spa, nvlist_t *config) | |
| 937 { | |
| 938 nvlist_t **spares; | |
| 939 uint_t i, nspares; | |
| 940 nvlist_t *nvroot; | |
| 941 uint64_t guid; | |
| 942 vdev_stat_t *vs; | |
| 943 uint_t vsc; | |
|
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944 uint64_t pool; |
| 2082 | 945 |
| 946 if (spa->spa_nspares == 0) | |
| 947 return; | |
| 948 | |
| 949 VERIFY(nvlist_lookup_nvlist(config, | |
| 950 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); | |
| 951 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 952 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 953 if (nspares != 0) { | |
| 954 VERIFY(nvlist_add_nvlist_array(nvroot, | |
| 955 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 956 VERIFY(nvlist_lookup_nvlist_array(nvroot, | |
| 957 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 958 | |
| 959 /* | |
| 960 * Go through and find any spares which have since been | |
| 961 * repurposed as an active spare. If this is the case, update | |
| 962 * their status appropriately. | |
| 963 */ | |
| 964 for (i = 0; i < nspares; i++) { | |
| 965 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 966 ZPOOL_CONFIG_GUID, &guid) == 0); | |
|
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967 if (spa_spare_exists(guid, &pool) && pool != 0ULL) { |
| 2082 | 968 VERIFY(nvlist_lookup_uint64_array( |
| 969 spares[i], ZPOOL_CONFIG_STATS, | |
| 970 (uint64_t **)&vs, &vsc) == 0); | |
| 971 vs->vs_state = VDEV_STATE_CANT_OPEN; | |
| 972 vs->vs_aux = VDEV_AUX_SPARED; | |
| 973 } | |
| 974 } | |
| 975 } | |
| 976 } | |
| 977 | |
| 789 | 978 int |
| 1544 | 979 spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) |
| 789 | 980 { |
| 981 int error; | |
| 982 spa_t *spa; | |
| 983 | |
| 984 *config = NULL; | |
| 985 error = spa_open_common(name, &spa, FTAG, config); | |
| 986 | |
| 2082 | 987 if (spa && *config != NULL) { |
| 1544 | 988 VERIFY(nvlist_add_uint64(*config, ZPOOL_CONFIG_ERRCOUNT, |
| 989 spa_get_errlog_size(spa)) == 0); | |
| 990 | |
| 2082 | 991 spa_add_spares(spa, *config); |
| 992 } | |
| 993 | |
| 1544 | 994 /* |
| 995 * We want to get the alternate root even for faulted pools, so we cheat | |
| 996 * and call spa_lookup() directly. | |
| 997 */ | |
| 998 if (altroot) { | |
| 999 if (spa == NULL) { | |
| 1000 mutex_enter(&spa_namespace_lock); | |
| 1001 spa = spa_lookup(name); | |
| 1002 if (spa) | |
| 1003 spa_altroot(spa, altroot, buflen); | |
| 1004 else | |
| 1005 altroot[0] = '\0'; | |
| 1006 spa = NULL; | |
| 1007 mutex_exit(&spa_namespace_lock); | |
| 1008 } else { | |
| 1009 spa_altroot(spa, altroot, buflen); | |
| 1010 } | |
| 1011 } | |
| 1012 | |
| 789 | 1013 if (spa != NULL) |
| 1014 spa_close(spa, FTAG); | |
| 1015 | |
| 1016 return (error); | |
| 1017 } | |
| 1018 | |
| 1019 /* | |
| 2082 | 1020 * Validate that the 'spares' array is well formed. We must have an array of |
|
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1021 * nvlists, each which describes a valid leaf vdev. If this is an import (mode |
|
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1022 * is VDEV_ALLOC_SPARE), then we allow corrupted spares to be specified, as long |
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|
1023 * as they are well-formed. |
| 2082 | 1024 */ |
| 1025 static int | |
| 1026 spa_validate_spares(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) | |
| 1027 { | |
| 1028 nvlist_t **spares; | |
| 1029 uint_t i, nspares; | |
| 1030 vdev_t *vd; | |
| 1031 int error; | |
| 1032 | |
| 1033 /* | |
| 1034 * It's acceptable to have no spares specified. | |
| 1035 */ | |
| 1036 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1037 &spares, &nspares) != 0) | |
| 1038 return (0); | |
| 1039 | |
| 1040 if (nspares == 0) | |
| 1041 return (EINVAL); | |
| 1042 | |
| 1043 /* | |
| 1044 * Make sure the pool is formatted with a version that supports hot | |
| 1045 * spares. | |
| 1046 */ | |
| 1047 if (spa_version(spa) < ZFS_VERSION_SPARES) | |
| 1048 return (ENOTSUP); | |
| 1049 | |
|
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|
1050 /* |
|
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1051 * Set the pending spare list so we correctly handle device in-use |
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1052 * checking. |
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1053 */ |
|
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1054 spa->spa_pending_spares = spares; |
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1055 spa->spa_pending_nspares = nspares; |
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1056 |
| 2082 | 1057 for (i = 0; i < nspares; i++) { |
| 1058 if ((error = spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 1059 mode)) != 0) | |
|
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1060 goto out; |
| 2082 | 1061 |
| 1062 if (!vd->vdev_ops->vdev_op_leaf) { | |
| 1063 vdev_free(vd); | |
|
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1064 error = EINVAL; |
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1065 goto out; |
| 2082 | 1066 } |
| 1067 | |
| 1068 vd->vdev_top = vd; | |
|
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1069 |
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1070 if ((error = vdev_open(vd)) == 0 && |
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1071 (error = vdev_label_init(vd, crtxg, |
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1072 VDEV_LABEL_SPARE)) == 0) { |
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1073 VERIFY(nvlist_add_uint64(spares[i], ZPOOL_CONFIG_GUID, |
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1074 vd->vdev_guid) == 0); |
| 2082 | 1075 } |
| 1076 | |
| 1077 vdev_free(vd); | |
|
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1078 |
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1079 if (error && mode != VDEV_ALLOC_SPARE) |
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1080 goto out; |
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1081 else |
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1082 error = 0; |
| 2082 | 1083 } |
| 1084 | |
|
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1085 out: |
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1086 spa->spa_pending_spares = NULL; |
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1087 spa->spa_pending_nspares = 0; |
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1088 return (error); |
| 2082 | 1089 } |
| 1090 | |
| 1091 /* | |
| 789 | 1092 * Pool Creation |
| 1093 */ | |
| 1094 int | |
|
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1095 spa_create(const char *pool, nvlist_t *nvroot, const char *altroot) |
| 789 | 1096 { |
| 1097 spa_t *spa; | |
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1098 vdev_t *rvd; |
| 789 | 1099 dsl_pool_t *dp; |
| 1100 dmu_tx_t *tx; | |
| 2082 | 1101 int c, error = 0; |
| 789 | 1102 uint64_t txg = TXG_INITIAL; |
| 2082 | 1103 nvlist_t **spares; |
| 1104 uint_t nspares; | |
| 789 | 1105 |
| 1106 /* | |
| 1107 * If this pool already exists, return failure. | |
| 1108 */ | |
| 1109 mutex_enter(&spa_namespace_lock); | |
| 1110 if (spa_lookup(pool) != NULL) { | |
| 1111 mutex_exit(&spa_namespace_lock); | |
| 1112 return (EEXIST); | |
| 1113 } | |
| 1114 | |
| 1115 /* | |
| 1116 * Allocate a new spa_t structure. | |
| 1117 */ | |
|
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1118 spa = spa_add(pool, altroot); |
| 789 | 1119 spa_activate(spa); |
| 1120 | |
| 1121 spa->spa_uberblock.ub_txg = txg - 1; | |
| 1760 | 1122 spa->spa_uberblock.ub_version = ZFS_VERSION; |
| 789 | 1123 spa->spa_ubsync = spa->spa_uberblock; |
| 1124 | |
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1125 /* |
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1126 * Create the root vdev. |
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1127 */ |
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1128 spa_config_enter(spa, RW_WRITER, FTAG); |
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1129 |
| 2082 | 1130 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); |
| 1131 | |
| 1132 ASSERT(error != 0 || rvd != NULL); | |
| 1133 ASSERT(error != 0 || spa->spa_root_vdev == rvd); | |
| 1134 | |
| 1135 if (error == 0 && rvd->vdev_children == 0) | |
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1136 error = EINVAL; |
| 2082 | 1137 |
| 1138 if (error == 0 && | |
| 1139 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && | |
| 1140 (error = spa_validate_spares(spa, nvroot, txg, | |
| 1141 VDEV_ALLOC_ADD)) == 0) { | |
| 1142 for (c = 0; c < rvd->vdev_children; c++) | |
| 1143 vdev_init(rvd->vdev_child[c], txg); | |
| 1144 vdev_config_dirty(rvd); | |
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1145 } |
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1146 |
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1147 spa_config_exit(spa, FTAG); |
| 789 | 1148 |
| 2082 | 1149 if (error != 0) { |
| 789 | 1150 spa_unload(spa); |
| 1151 spa_deactivate(spa); | |
| 1152 spa_remove(spa); | |
| 1153 mutex_exit(&spa_namespace_lock); | |
| 1154 return (error); | |
| 1155 } | |
| 1156 | |
| 2082 | 1157 /* |
| 1158 * Get the list of spares, if specified. | |
| 1159 */ | |
| 1160 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1161 &spares, &nspares) == 0) { | |
| 1162 VERIFY(nvlist_alloc(&spa->spa_sparelist, NV_UNIQUE_NAME, | |
| 1163 KM_SLEEP) == 0); | |
| 1164 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1165 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1166 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1167 spa_load_spares(spa); | |
| 1168 spa_config_exit(spa, FTAG); | |
| 1169 spa->spa_sync_spares = B_TRUE; | |
| 1170 } | |
| 1171 | |
| 789 | 1172 spa->spa_dsl_pool = dp = dsl_pool_create(spa, txg); |
| 1173 spa->spa_meta_objset = dp->dp_meta_objset; | |
| 1174 | |
| 1175 tx = dmu_tx_create_assigned(dp, txg); | |
| 1176 | |
| 1177 /* | |
| 1178 * Create the pool config object. | |
| 1179 */ | |
| 1180 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 1181 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 1182 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 1183 | |
| 1544 | 1184 if (zap_add(spa->spa_meta_objset, |
| 789 | 1185 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 1186 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { |
| 1187 cmn_err(CE_PANIC, "failed to add pool config"); | |
| 1188 } | |
| 789 | 1189 |
| 2082 | 1190 /* Newly created pools are always deflated. */ |
| 1191 spa->spa_deflate = TRUE; | |
| 1192 if (zap_add(spa->spa_meta_objset, | |
| 1193 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 1194 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { | |
| 1195 cmn_err(CE_PANIC, "failed to add deflate"); | |
| 1196 } | |
| 1197 | |
| 789 | 1198 /* |
| 1199 * Create the deferred-free bplist object. Turn off compression | |
| 1200 * because sync-to-convergence takes longer if the blocksize | |
| 1201 * keeps changing. | |
| 1202 */ | |
| 1203 spa->spa_sync_bplist_obj = bplist_create(spa->spa_meta_objset, | |
| 1204 1 << 14, tx); | |
| 1205 dmu_object_set_compress(spa->spa_meta_objset, spa->spa_sync_bplist_obj, | |
| 1206 ZIO_COMPRESS_OFF, tx); | |
| 1207 | |
| 1544 | 1208 if (zap_add(spa->spa_meta_objset, |
| 789 | 1209 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, |
| 1544 | 1210 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj, tx) != 0) { |
| 1211 cmn_err(CE_PANIC, "failed to add bplist"); | |
| 1212 } | |
| 789 | 1213 |
| 2926 | 1214 /* |
| 1215 * Create the pool's history object. | |
| 1216 */ | |
| 1217 spa_history_create_obj(spa, tx); | |
| 1218 | |
| 789 | 1219 dmu_tx_commit(tx); |
| 1220 | |
| 3912 | 1221 spa->spa_bootfs = zfs_prop_default_numeric(ZFS_PROP_BOOTFS); |
| 789 | 1222 spa->spa_sync_on = B_TRUE; |
| 1223 txg_sync_start(spa->spa_dsl_pool); | |
| 1224 | |
| 1225 /* | |
| 1226 * We explicitly wait for the first transaction to complete so that our | |
| 1227 * bean counters are appropriately updated. | |
| 1228 */ | |
| 1229 txg_wait_synced(spa->spa_dsl_pool, txg); | |
| 1230 | |
| 1231 spa_config_sync(); | |
| 1232 | |
| 1233 mutex_exit(&spa_namespace_lock); | |
| 1234 | |
| 1235 return (0); | |
| 1236 } | |
| 1237 | |
| 1238 /* | |
| 1239 * Import the given pool into the system. We set up the necessary spa_t and | |
| 1240 * then call spa_load() to do the dirty work. | |
| 1241 */ | |
| 1242 int | |
|
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1243 spa_import(const char *pool, nvlist_t *config, const char *altroot) |
| 789 | 1244 { |
| 1245 spa_t *spa; | |
| 1246 int error; | |
| 2082 | 1247 nvlist_t *nvroot; |
| 1248 nvlist_t **spares; | |
| 1249 uint_t nspares; | |
| 789 | 1250 |
| 1251 if (!(spa_mode & FWRITE)) | |
| 1252 return (EROFS); | |
| 1253 | |
| 1254 /* | |
| 1255 * If a pool with this name exists, return failure. | |
| 1256 */ | |
| 1257 mutex_enter(&spa_namespace_lock); | |
| 1258 if (spa_lookup(pool) != NULL) { | |
| 1259 mutex_exit(&spa_namespace_lock); | |
| 1260 return (EEXIST); | |
| 1261 } | |
| 1262 | |
| 1263 /* | |
|
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1264 * Create and initialize the spa structure. |
| 789 | 1265 */ |
|
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1266 spa = spa_add(pool, altroot); |
| 789 | 1267 spa_activate(spa); |
| 1268 | |
| 1269 /* | |
|
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1270 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1271 * Pass TRUE for mosconfig because the user-supplied config |
| 1272 * is actually the one to trust when doing an import. | |
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1273 */ |
| 1732 | 1274 error = spa_load(spa, config, SPA_LOAD_IMPORT, B_TRUE); |
| 789 | 1275 |
| 2082 | 1276 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1277 /* | |
| 1278 * Toss any existing sparelist, as it doesn't have any validity anymore, | |
| 1279 * and conflicts with spa_has_spare(). | |
| 1280 */ | |
| 1281 if (spa->spa_sparelist) { | |
| 1282 nvlist_free(spa->spa_sparelist); | |
| 1283 spa->spa_sparelist = NULL; | |
| 1284 spa_load_spares(spa); | |
| 1285 } | |
| 1286 | |
| 1287 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
| 1288 &nvroot) == 0); | |
| 1289 if (error == 0) | |
| 1290 error = spa_validate_spares(spa, nvroot, -1ULL, | |
| 1291 VDEV_ALLOC_SPARE); | |
| 1292 spa_config_exit(spa, FTAG); | |
| 1293 | |
| 1294 if (error != 0) { | |
| 789 | 1295 spa_unload(spa); |
| 1296 spa_deactivate(spa); | |
| 1297 spa_remove(spa); | |
| 1298 mutex_exit(&spa_namespace_lock); | |
| 1299 return (error); | |
| 1300 } | |
| 1301 | |
|
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1302 /* |
| 2082 | 1303 * Override any spares as specified by the user, as these may have |
| 1304 * correct device names/devids, etc. | |
| 1305 */ | |
| 1306 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1307 &spares, &nspares) == 0) { | |
| 1308 if (spa->spa_sparelist) | |
| 1309 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1310 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1311 else | |
| 1312 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1313 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1314 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1315 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1316 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1317 spa_load_spares(spa); | |
| 1318 spa_config_exit(spa, FTAG); | |
| 1319 spa->spa_sync_spares = B_TRUE; | |
| 1320 } | |
| 1321 | |
| 1322 /* | |
|
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1323 * Update the config cache to include the newly-imported pool. |
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1324 */ |
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1325 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1326 |
| 789 | 1327 mutex_exit(&spa_namespace_lock); |
| 1328 | |
| 1329 /* | |
| 1330 * Resilver anything that's out of date. | |
| 1331 */ | |
| 1332 if (spa_mode & FWRITE) | |
| 1333 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1334 | |
| 1335 return (0); | |
| 1336 } | |
| 1337 | |
| 1338 /* | |
| 1339 * This (illegal) pool name is used when temporarily importing a spa_t in order | |
| 1340 * to get the vdev stats associated with the imported devices. | |
| 1341 */ | |
| 1342 #define TRYIMPORT_NAME "$import" | |
| 1343 | |
| 1344 nvlist_t * | |
| 1345 spa_tryimport(nvlist_t *tryconfig) | |
| 1346 { | |
| 1347 nvlist_t *config = NULL; | |
| 1348 char *poolname; | |
| 1349 spa_t *spa; | |
| 1350 uint64_t state; | |
| 1351 | |
| 1352 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) | |
| 1353 return (NULL); | |
| 1354 | |
| 1355 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) | |
| 1356 return (NULL); | |
| 1357 | |
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1358 /* |
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1359 * Create and initialize the spa structure. |
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1360 */ |
| 789 | 1361 mutex_enter(&spa_namespace_lock); |
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1362 spa = spa_add(TRYIMPORT_NAME, NULL); |
| 789 | 1363 spa_activate(spa); |
| 1364 | |
| 1365 /* | |
|
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1366 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1367 * Pass TRUE for mosconfig because the user-supplied config |
| 1368 * is actually the one to trust when doing an import. | |
| 789 | 1369 */ |
| 1732 | 1370 (void) spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE); |
| 789 | 1371 |
| 1372 /* | |
| 1373 * If 'tryconfig' was at least parsable, return the current config. | |
| 1374 */ | |
| 1375 if (spa->spa_root_vdev != NULL) { | |
|
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1376 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 1377 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
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1378 spa_config_exit(spa, FTAG); |
| 789 | 1379 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, |
| 1380 poolname) == 0); | |
| 1381 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
| 1382 state) == 0); | |
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1383 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, |
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1384 spa->spa_uberblock.ub_timestamp) == 0); |
| 2082 | 1385 |
| 1386 /* | |
| 1387 * Add the list of hot spares. | |
| 1388 */ | |
| 1389 spa_add_spares(spa, config); | |
| 789 | 1390 } |
| 1391 | |
| 1392 spa_unload(spa); | |
| 1393 spa_deactivate(spa); | |
| 1394 spa_remove(spa); | |
| 1395 mutex_exit(&spa_namespace_lock); | |
| 1396 | |
| 1397 return (config); | |
| 1398 } | |
| 1399 | |
| 1400 /* | |
| 1401 * Pool export/destroy | |
| 1402 * | |
| 1403 * The act of destroying or exporting a pool is very simple. We make sure there | |
| 1404 * is no more pending I/O and any references to the pool are gone. Then, we | |
| 1405 * update the pool state and sync all the labels to disk, removing the | |
| 1406 * configuration from the cache afterwards. | |
| 1407 */ | |
| 1408 static int | |
|
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1409 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig) |
| 789 | 1410 { |
| 1411 spa_t *spa; | |
| 1412 | |
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1413 if (oldconfig) |
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1414 *oldconfig = NULL; |
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1415 |
| 789 | 1416 if (!(spa_mode & FWRITE)) |
| 1417 return (EROFS); | |
| 1418 | |
| 1419 mutex_enter(&spa_namespace_lock); | |
| 1420 if ((spa = spa_lookup(pool)) == NULL) { | |
| 1421 mutex_exit(&spa_namespace_lock); | |
| 1422 return (ENOENT); | |
| 1423 } | |
| 1424 | |
| 1425 /* | |
| 1544 | 1426 * Put a hold on the pool, drop the namespace lock, stop async tasks, |
| 1427 * reacquire the namespace lock, and see if we can export. | |
| 1428 */ | |
| 1429 spa_open_ref(spa, FTAG); | |
| 1430 mutex_exit(&spa_namespace_lock); | |
| 1431 spa_async_suspend(spa); | |
| 1432 mutex_enter(&spa_namespace_lock); | |
| 1433 spa_close(spa, FTAG); | |
| 1434 | |
| 1435 /* | |
| 789 | 1436 * The pool will be in core if it's openable, |
| 1437 * in which case we can modify its state. | |
| 1438 */ | |
| 1439 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { | |
| 1440 /* | |
| 1441 * Objsets may be open only because they're dirty, so we | |
| 1442 * have to force it to sync before checking spa_refcnt. | |
| 1443 */ | |
| 1444 spa_scrub_suspend(spa); | |
| 1445 txg_wait_synced(spa->spa_dsl_pool, 0); | |
| 1446 | |
| 1544 | 1447 /* |
| 1448 * A pool cannot be exported or destroyed if there are active | |
| 1449 * references. If we are resetting a pool, allow references by | |
| 1450 * fault injection handlers. | |
| 1451 */ | |
| 1452 if (!spa_refcount_zero(spa) || | |
| 1453 (spa->spa_inject_ref != 0 && | |
| 1454 new_state != POOL_STATE_UNINITIALIZED)) { | |
| 789 | 1455 spa_scrub_resume(spa); |
| 1544 | 1456 spa_async_resume(spa); |
| 789 | 1457 mutex_exit(&spa_namespace_lock); |
| 1458 return (EBUSY); | |
| 1459 } | |
| 1460 | |
| 1461 spa_scrub_resume(spa); | |
| 1462 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); | |
| 1463 | |
| 1464 /* | |
| 1465 * We want this to be reflected on every label, | |
| 1466 * so mark them all dirty. spa_unload() will do the | |
| 1467 * final sync that pushes these changes out. | |
| 1468 */ | |
| 1544 | 1469 if (new_state != POOL_STATE_UNINITIALIZED) { |
|
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1470 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1544 | 1471 spa->spa_state = new_state; |
|
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1472 spa->spa_final_txg = spa_last_synced_txg(spa) + 1; |
| 1544 | 1473 vdev_config_dirty(spa->spa_root_vdev); |
|
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1474 spa_config_exit(spa, FTAG); |
| 1544 | 1475 } |
| 789 | 1476 } |
| 1477 | |
| 1478 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 1479 spa_unload(spa); | |
| 1480 spa_deactivate(spa); | |
| 1481 } | |
| 1482 | |
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1483 if (oldconfig && spa->spa_config) |
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1484 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); |
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1485 |
| 1544 | 1486 if (new_state != POOL_STATE_UNINITIALIZED) { |
| 1487 spa_remove(spa); | |
| 1488 spa_config_sync(); | |
| 1489 } | |
| 789 | 1490 mutex_exit(&spa_namespace_lock); |
| 1491 | |
| 1492 return (0); | |
| 1493 } | |
| 1494 | |
| 1495 /* | |
| 1496 * Destroy a storage pool. | |
| 1497 */ | |
| 1498 int | |
| 1499 spa_destroy(char *pool) | |
| 1500 { | |
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1501 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL)); |
| 789 | 1502 } |
| 1503 | |
| 1504 /* | |
| 1505 * Export a storage pool. | |
| 1506 */ | |
| 1507 int | |
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1508 spa_export(char *pool, nvlist_t **oldconfig) |
| 789 | 1509 { |
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1510 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig)); |
| 789 | 1511 } |
| 1512 | |
| 1513 /* | |
| 1544 | 1514 * Similar to spa_export(), this unloads the spa_t without actually removing it |
| 1515 * from the namespace in any way. | |
| 1516 */ | |
| 1517 int | |
| 1518 spa_reset(char *pool) | |
| 1519 { | |
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1520 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL)); |
| 1544 | 1521 } |
| 1522 | |
| 1523 | |
| 1524 /* | |
| 789 | 1525 * ========================================================================== |
| 1526 * Device manipulation | |
| 1527 * ========================================================================== | |
| 1528 */ | |
| 1529 | |
| 1530 /* | |
| 1531 * Add capacity to a storage pool. | |
| 1532 */ | |
| 1533 int | |
| 1534 spa_vdev_add(spa_t *spa, nvlist_t *nvroot) | |
| 1535 { | |
| 1536 uint64_t txg; | |
|
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1537 int c, error; |
| 789 | 1538 vdev_t *rvd = spa->spa_root_vdev; |
|
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1539 vdev_t *vd, *tvd; |
| 2082 | 1540 nvlist_t **spares; |
| 1541 uint_t i, nspares; | |
| 789 | 1542 |
| 1543 txg = spa_vdev_enter(spa); | |
| 1544 | |
| 2082 | 1545 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, |
| 1546 VDEV_ALLOC_ADD)) != 0) | |
| 1547 return (spa_vdev_exit(spa, NULL, txg, error)); | |
| 1548 | |
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1549 spa->spa_pending_vdev = vd; |
| 789 | 1550 |
| 2082 | 1551 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, |
| 1552 &spares, &nspares) != 0) | |
| 1553 nspares = 0; | |
| 1554 | |
|
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1555 if (vd->vdev_children == 0 && nspares == 0) { |
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1556 spa->spa_pending_vdev = NULL; |
| 2082 | 1557 return (spa_vdev_exit(spa, vd, txg, EINVAL)); |
|
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1558 } |
| 2082 | 1559 |
| 1560 if (vd->vdev_children != 0) { | |
|
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1561 if ((error = vdev_create(vd, txg, B_FALSE)) != 0) { |
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1562 spa->spa_pending_vdev = NULL; |
| 2082 | 1563 return (spa_vdev_exit(spa, vd, txg, error)); |
| 1564 } | |
| 1565 } | |
| 1566 | |
|
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1567 /* |
|
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1568 * We must validate the spares after checking the children. Otherwise, |
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1569 * vdev_inuse() will blindly overwrite the spare. |
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1570 */ |
|
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1571 if ((error = spa_validate_spares(spa, nvroot, txg, |
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1572 VDEV_ALLOC_ADD)) != 0) { |
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1573 spa->spa_pending_vdev = NULL; |
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1574 return (spa_vdev_exit(spa, vd, txg, error)); |
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1575 } |
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1576 |
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1577 spa->spa_pending_vdev = NULL; |
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1578 |
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1579 /* |
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1580 * Transfer each new top-level vdev from vd to rvd. |
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1581 */ |
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1582 for (c = 0; c < vd->vdev_children; c++) { |
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1583 tvd = vd->vdev_child[c]; |
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1584 vdev_remove_child(vd, tvd); |
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1585 tvd->vdev_id = rvd->vdev_children; |
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1586 vdev_add_child(rvd, tvd); |
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1587 vdev_config_dirty(tvd); |
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1588 } |
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1589 |
| 2082 | 1590 if (nspares != 0) { |
| 1591 if (spa->spa_sparelist != NULL) { | |
| 1592 nvlist_t **oldspares; | |
| 1593 uint_t oldnspares; | |
| 1594 nvlist_t **newspares; | |
| 1595 | |
| 1596 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 1597 ZPOOL_CONFIG_SPARES, &oldspares, &oldnspares) == 0); | |
| 1598 | |
| 1599 newspares = kmem_alloc(sizeof (void *) * | |
| 1600 (nspares + oldnspares), KM_SLEEP); | |
| 1601 for (i = 0; i < oldnspares; i++) | |
| 1602 VERIFY(nvlist_dup(oldspares[i], | |
| 1603 &newspares[i], KM_SLEEP) == 0); | |
| 1604 for (i = 0; i < nspares; i++) | |
| 1605 VERIFY(nvlist_dup(spares[i], | |
| 1606 &newspares[i + oldnspares], | |
| 1607 KM_SLEEP) == 0); | |
| 1608 | |
| 1609 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1610 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1611 | |
| 1612 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1613 ZPOOL_CONFIG_SPARES, newspares, | |
| 1614 nspares + oldnspares) == 0); | |
| 1615 for (i = 0; i < oldnspares + nspares; i++) | |
| 1616 nvlist_free(newspares[i]); | |
| 1617 kmem_free(newspares, (oldnspares + nspares) * | |
| 1618 sizeof (void *)); | |
| 1619 } else { | |
| 1620 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1621 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1622 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1623 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1624 } | |
| 1625 | |
| 1626 spa_load_spares(spa); | |
| 1627 spa->spa_sync_spares = B_TRUE; | |
| 789 | 1628 } |
| 1629 | |
| 1630 /* | |
|
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1631 * We have to be careful when adding new vdevs to an existing pool. |
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1632 * If other threads start allocating from these vdevs before we |
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1633 * sync the config cache, and we lose power, then upon reboot we may |
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1634 * fail to open the pool because there are DVAs that the config cache |
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1635 * can't translate. Therefore, we first add the vdevs without |
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1636 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); |
|
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1637 * and then let spa_config_update() initialize the new metaslabs. |
|
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1638 * |
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1639 * spa_load() checks for added-but-not-initialized vdevs, so that |
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1640 * if we lose power at any point in this sequence, the remaining |
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1641 * steps will be completed the next time we load the pool. |
| 789 | 1642 */ |
|
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1643 (void) spa_vdev_exit(spa, vd, txg, 0); |
|
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1644 |
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1645 mutex_enter(&spa_namespace_lock); |
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1646 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1647 mutex_exit(&spa_namespace_lock); |
| 789 | 1648 |
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1649 return (0); |
| 789 | 1650 } |
| 1651 | |
| 1652 /* | |
| 1653 * Attach a device to a mirror. The arguments are the path to any device | |
| 1654 * in the mirror, and the nvroot for the new device. If the path specifies | |
| 1655 * a device that is not mirrored, we automatically insert the mirror vdev. | |
| 1656 * | |
| 1657 * If 'replacing' is specified, the new device is intended to replace the | |
| 1658 * existing device; in this case the two devices are made into their own | |
| 1659 * mirror using the 'replacing' vdev, which is functionally idendical to | |
| 1660 * the mirror vdev (it actually reuses all the same ops) but has a few | |
| 1661 * extra rules: you can't attach to it after it's been created, and upon | |
| 1662 * completion of resilvering, the first disk (the one being replaced) | |
| 1663 * is automatically detached. | |
| 1664 */ | |
| 1665 int | |
| 1544 | 1666 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) |
| 789 | 1667 { |
| 1668 uint64_t txg, open_txg; | |
| 1669 int error; | |
| 1670 vdev_t *rvd = spa->spa_root_vdev; | |
| 1671 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; | |
| 2082 | 1672 vdev_ops_t *pvops; |
| 789 | 1673 |
| 1674 txg = spa_vdev_enter(spa); | |
| 1675 | |
| 1544 | 1676 oldvd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1677 |
| 1678 if (oldvd == NULL) | |
| 1679 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1680 | |
|
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1681 if (!oldvd->vdev_ops->vdev_op_leaf) |
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1682 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1683 |
| 789 | 1684 pvd = oldvd->vdev_parent; |
| 1685 | |
| 2082 | 1686 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, |
| 1687 VDEV_ALLOC_ADD)) != 0 || newrootvd->vdev_children != 1) | |
| 789 | 1688 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); |
| 1689 | |
| 1690 newvd = newrootvd->vdev_child[0]; | |
| 1691 | |
| 1692 if (!newvd->vdev_ops->vdev_op_leaf) | |
| 1693 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); | |
| 1694 | |
| 2082 | 1695 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) |
| 789 | 1696 return (spa_vdev_exit(spa, newrootvd, txg, error)); |
| 1697 | |
| 2082 | 1698 if (!replacing) { |
| 1699 /* | |
| 1700 * For attach, the only allowable parent is a mirror or the root | |
| 1701 * vdev. | |
| 1702 */ | |
| 1703 if (pvd->vdev_ops != &vdev_mirror_ops && | |
| 1704 pvd->vdev_ops != &vdev_root_ops) | |
| 1705 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1706 | |
| 1707 pvops = &vdev_mirror_ops; | |
| 1708 } else { | |
| 1709 /* | |
| 1710 * Active hot spares can only be replaced by inactive hot | |
| 1711 * spares. | |
| 1712 */ | |
| 1713 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1714 pvd->vdev_child[1] == oldvd && | |
| 1715 !spa_has_spare(spa, newvd->vdev_guid)) | |
| 1716 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1717 | |
| 1718 /* | |
| 1719 * If the source is a hot spare, and the parent isn't already a | |
| 1720 * spare, then we want to create a new hot spare. Otherwise, we | |
|
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1721 * want to create a replacing vdev. The user is not allowed to |
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1722 * attach to a spared vdev child unless the 'isspare' state is |
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1723 * the same (spare replaces spare, non-spare replaces |
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1724 * non-spare). |
| 2082 | 1725 */ |
| 1726 if (pvd->vdev_ops == &vdev_replacing_ops) | |
| 1727 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
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1728 else if (pvd->vdev_ops == &vdev_spare_ops && |
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1729 newvd->vdev_isspare != oldvd->vdev_isspare) |
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1730 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); |
| 2082 | 1731 else if (pvd->vdev_ops != &vdev_spare_ops && |
| 1732 newvd->vdev_isspare) | |
| 1733 pvops = &vdev_spare_ops; | |
| 1734 else | |
| 1735 pvops = &vdev_replacing_ops; | |
| 1736 } | |
| 1737 | |
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1738 /* |
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1739 * Compare the new device size with the replaceable/attachable |
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1740 * device size. |
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1741 */ |
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1742 if (newvd->vdev_psize < vdev_get_rsize(oldvd)) |
| 789 | 1743 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); |
| 1744 | |
| 1732 | 1745 /* |
| 1746 * The new device cannot have a higher alignment requirement | |
| 1747 * than the top-level vdev. | |
| 1748 */ | |
| 1749 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) | |
| 789 | 1750 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); |
| 1751 | |
| 1752 /* | |
| 1753 * If this is an in-place replacement, update oldvd's path and devid | |
| 1754 * to make it distinguishable from newvd, and unopenable from now on. | |
| 1755 */ | |
| 1756 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { | |
| 1757 spa_strfree(oldvd->vdev_path); | |
| 1758 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, | |
| 1759 KM_SLEEP); | |
| 1760 (void) sprintf(oldvd->vdev_path, "%s/%s", | |
| 1761 newvd->vdev_path, "old"); | |
| 1762 if (oldvd->vdev_devid != NULL) { | |
| 1763 spa_strfree(oldvd->vdev_devid); | |
| 1764 oldvd->vdev_devid = NULL; | |
| 1765 } | |
| 1766 } | |
| 1767 | |
| 1768 /* | |
| 2082 | 1769 * If the parent is not a mirror, or if we're replacing, insert the new |
| 1770 * mirror/replacing/spare vdev above oldvd. | |
| 789 | 1771 */ |
| 1772 if (pvd->vdev_ops != pvops) | |
| 1773 pvd = vdev_add_parent(oldvd, pvops); | |
| 1774 | |
| 1775 ASSERT(pvd->vdev_top->vdev_parent == rvd); | |
| 1776 ASSERT(pvd->vdev_ops == pvops); | |
| 1777 ASSERT(oldvd->vdev_parent == pvd); | |
| 1778 | |
| 1779 /* | |
| 1780 * Extract the new device from its root and add it to pvd. | |
| 1781 */ | |
| 1782 vdev_remove_child(newrootvd, newvd); | |
| 1783 newvd->vdev_id = pvd->vdev_children; | |
| 1784 vdev_add_child(pvd, newvd); | |
| 1785 | |
| 1544 | 1786 /* |
| 1787 * If newvd is smaller than oldvd, but larger than its rsize, | |
| 1788 * the addition of newvd may have decreased our parent's asize. | |
| 1789 */ | |
| 1790 pvd->vdev_asize = MIN(pvd->vdev_asize, newvd->vdev_asize); | |
| 1791 | |
| 789 | 1792 tvd = newvd->vdev_top; |
| 1793 ASSERT(pvd->vdev_top == tvd); | |
| 1794 ASSERT(tvd->vdev_parent == rvd); | |
| 1795 | |
| 1796 vdev_config_dirty(tvd); | |
| 1797 | |
| 1798 /* | |
| 1799 * Set newvd's DTL to [TXG_INITIAL, open_txg]. It will propagate | |
| 1800 * upward when spa_vdev_exit() calls vdev_dtl_reassess(). | |
| 1801 */ | |
| 1802 open_txg = txg + TXG_CONCURRENT_STATES - 1; | |
| 1803 | |
| 1804 mutex_enter(&newvd->vdev_dtl_lock); | |
| 1805 space_map_add(&newvd->vdev_dtl_map, TXG_INITIAL, | |
| 1806 open_txg - TXG_INITIAL + 1); | |
| 1807 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1808 | |
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1809 if (newvd->vdev_isspare) |
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1810 spa_spare_activate(newvd); |
| 1544 | 1811 |
| 789 | 1812 /* |
| 1813 * Mark newvd's DTL dirty in this txg. | |
| 1814 */ | |
| 1732 | 1815 vdev_dirty(tvd, VDD_DTL, newvd, txg); |
| 789 | 1816 |
| 1817 (void) spa_vdev_exit(spa, newrootvd, open_txg, 0); | |
| 1818 | |
| 1819 /* | |
| 1820 * Kick off a resilver to update newvd. | |
| 1821 */ | |
| 1822 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1823 | |
| 1824 return (0); | |
| 1825 } | |
| 1826 | |
| 1827 /* | |
| 1828 * Detach a device from a mirror or replacing vdev. | |
| 1829 * If 'replace_done' is specified, only detach if the parent | |
| 1830 * is a replacing vdev. | |
| 1831 */ | |
| 1832 int | |
| 1544 | 1833 spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) |
| 789 | 1834 { |
| 1835 uint64_t txg; | |
| 1836 int c, t, error; | |
| 1837 vdev_t *rvd = spa->spa_root_vdev; | |
| 1838 vdev_t *vd, *pvd, *cvd, *tvd; | |
| 2082 | 1839 boolean_t unspare = B_FALSE; |
| 1840 uint64_t unspare_guid; | |
| 789 | 1841 |
| 1842 txg = spa_vdev_enter(spa); | |
| 1843 | |
| 1544 | 1844 vd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1845 |
| 1846 if (vd == NULL) | |
| 1847 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1848 | |
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1849 if (!vd->vdev_ops->vdev_op_leaf) |
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1850 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1851 |
| 789 | 1852 pvd = vd->vdev_parent; |
| 1853 | |
| 1854 /* | |
| 1855 * If replace_done is specified, only remove this device if it's | |
| 2082 | 1856 * the first child of a replacing vdev. For the 'spare' vdev, either |
| 1857 * disk can be removed. | |
| 789 | 1858 */ |
| 2082 | 1859 if (replace_done) { |
| 1860 if (pvd->vdev_ops == &vdev_replacing_ops) { | |
| 1861 if (vd->vdev_id != 0) | |
| 1862 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1863 } else if (pvd->vdev_ops != &vdev_spare_ops) { | |
| 1864 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1865 } | |
| 1866 } | |
| 1867 | |
| 1868 ASSERT(pvd->vdev_ops != &vdev_spare_ops || | |
| 1869 spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 789 | 1870 |
| 1871 /* | |
| 2082 | 1872 * Only mirror, replacing, and spare vdevs support detach. |
| 789 | 1873 */ |
| 1874 if (pvd->vdev_ops != &vdev_replacing_ops && | |
| 2082 | 1875 pvd->vdev_ops != &vdev_mirror_ops && |
| 1876 pvd->vdev_ops != &vdev_spare_ops) | |
| 789 | 1877 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
| 1878 | |
| 1879 /* | |
| 1880 * If there's only one replica, you can't detach it. | |
| 1881 */ | |
| 1882 if (pvd->vdev_children <= 1) | |
| 1883 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
| 1884 | |
| 1885 /* | |
| 1886 * If all siblings have non-empty DTLs, this device may have the only | |
| 1887 * valid copy of the data, which means we cannot safely detach it. | |
| 1888 * | |
| 1889 * XXX -- as in the vdev_offline() case, we really want a more | |
| 1890 * precise DTL check. | |
| 1891 */ | |
| 1892 for (c = 0; c < pvd->vdev_children; c++) { | |
| 1893 uint64_t dirty; | |
| 1894 | |
| 1895 cvd = pvd->vdev_child[c]; | |
| 1896 if (cvd == vd) | |
| 1897 continue; | |
| 1898 if (vdev_is_dead(cvd)) | |
| 1899 continue; | |
| 1900 mutex_enter(&cvd->vdev_dtl_lock); | |
| 1901 dirty = cvd->vdev_dtl_map.sm_space | | |
| 1902 cvd->vdev_dtl_scrub.sm_space; | |
| 1903 mutex_exit(&cvd->vdev_dtl_lock); | |
| 1904 if (!dirty) | |
| 1905 break; | |
| 1906 } | |
| 2082 | 1907 |
| 1908 /* | |
| 1909 * If we are a replacing or spare vdev, then we can always detach the | |
| 1910 * latter child, as that is how one cancels the operation. | |
| 1911 */ | |
| 1912 if ((pvd->vdev_ops == &vdev_mirror_ops || vd->vdev_id != 1) && | |
| 1913 c == pvd->vdev_children) | |
| 789 | 1914 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); |
| 1915 | |
| 1916 /* | |
| 2082 | 1917 * If we are detaching the original disk from a spare, then it implies |
| 1918 * that the spare should become a real disk, and be removed from the | |
| 1919 * active spare list for the pool. | |
| 1920 */ | |
| 1921 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1922 vd->vdev_id == 0) | |
| 1923 unspare = B_TRUE; | |
| 1924 | |
| 1925 /* | |
| 789 | 1926 * Erase the disk labels so the disk can be used for other things. |
| 1927 * This must be done after all other error cases are handled, | |
| 1928 * but before we disembowel vd (so we can still do I/O to it). | |
| 1929 * But if we can't do it, don't treat the error as fatal -- | |
| 1930 * it may be that the unwritability of the disk is the reason | |
| 1931 * it's being detached! | |
| 1932 */ | |
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1933 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); |
| 789 | 1934 |
| 1935 /* | |
| 1936 * Remove vd from its parent and compact the parent's children. | |
| 1937 */ | |
| 1938 vdev_remove_child(pvd, vd); | |
| 1939 vdev_compact_children(pvd); | |
| 1940 | |
| 1941 /* | |
| 1942 * Remember one of the remaining children so we can get tvd below. | |
| 1943 */ | |
| 1944 cvd = pvd->vdev_child[0]; | |
| 1945 | |
| 1946 /* | |
| 2082 | 1947 * If we need to remove the remaining child from the list of hot spares, |
| 1948 * do it now, marking the vdev as no longer a spare in the process. We | |
| 1949 * must do this before vdev_remove_parent(), because that can change the | |
| 1950 * GUID if it creates a new toplevel GUID. | |
| 1951 */ | |
| 1952 if (unspare) { | |
| 1953 ASSERT(cvd->vdev_isspare); | |
|
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1954 spa_spare_remove(cvd); |
| 2082 | 1955 unspare_guid = cvd->vdev_guid; |
| 1956 } | |
| 1957 | |
| 1958 /* | |
| 789 | 1959 * If the parent mirror/replacing vdev only has one child, |
| 1960 * the parent is no longer needed. Remove it from the tree. | |
| 1961 */ | |
| 1962 if (pvd->vdev_children == 1) | |
| 1963 vdev_remove_parent(cvd); | |
| 1964 | |
| 1965 /* | |
| 1966 * We don't set tvd until now because the parent we just removed | |
| 1967 * may have been the previous top-level vdev. | |
| 1968 */ | |
| 1969 tvd = cvd->vdev_top; | |
| 1970 ASSERT(tvd->vdev_parent == rvd); | |
| 1971 | |
| 1972 /* | |
|
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1973 * Reevaluate the parent vdev state. |
| 789 | 1974 */ |
|
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1975 vdev_propagate_state(cvd->vdev_parent); |
| 789 | 1976 |
| 1977 /* | |
|
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1978 * If the device we just detached was smaller than the others, it may be |
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1979 * possible to add metaslabs (i.e. grow the pool). vdev_metaslab_init() |
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1980 * can't fail because the existing metaslabs are already in core, so |
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1981 * there's nothing to read from disk. |
| 789 | 1982 */ |
| 1732 | 1983 VERIFY(vdev_metaslab_init(tvd, txg) == 0); |
| 789 | 1984 |
| 1985 vdev_config_dirty(tvd); | |
| 1986 | |
| 1987 /* | |
|
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1988 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that |
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1989 * vd->vdev_detached is set and free vd's DTL object in syncing context. |
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1990 * But first make sure we're not on any *other* txg's DTL list, to |
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1991 * prevent vd from being accessed after it's freed. |
| 789 | 1992 */ |
| 1993 for (t = 0; t < TXG_SIZE; t++) | |
| 1994 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); | |
| 1732 | 1995 vd->vdev_detached = B_TRUE; |
| 1996 vdev_dirty(tvd, VDD_DTL, vd, txg); | |
| 789 | 1997 |
| 2082 | 1998 error = spa_vdev_exit(spa, vd, txg, 0); |
| 1999 | |
| 2000 /* | |
|
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2001 * If this was the removal of the original device in a hot spare vdev, |
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2002 * then we want to go through and remove the device from the hot spare |
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2003 * list of every other pool. |
| 2082 | 2004 */ |
| 2005 if (unspare) { | |
| 2006 spa = NULL; | |
| 2007 mutex_enter(&spa_namespace_lock); | |
| 2008 while ((spa = spa_next(spa)) != NULL) { | |
| 2009 if (spa->spa_state != POOL_STATE_ACTIVE) | |
| 2010 continue; | |
| 2011 | |
| 2012 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); | |
| 2013 } | |
| 2014 mutex_exit(&spa_namespace_lock); | |
| 2015 } | |
| 2016 | |
| 2017 return (error); | |
| 2018 } | |
| 2019 | |
| 2020 /* | |
| 2021 * Remove a device from the pool. Currently, this supports removing only hot | |
| 2022 * spares. | |
| 2023 */ | |
| 2024 int | |
| 2025 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) | |
| 2026 { | |
| 2027 vdev_t *vd; | |
| 2028 nvlist_t **spares, *nv, **newspares; | |
| 2029 uint_t i, j, nspares; | |
| 2030 int ret = 0; | |
| 2031 | |
| 2032 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2033 | |
| 2034 vd = spa_lookup_by_guid(spa, guid); | |
| 2035 | |
| 2036 nv = NULL; | |
| 2037 if (spa->spa_spares != NULL && | |
| 2038 nvlist_lookup_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 2039 &spares, &nspares) == 0) { | |
| 2040 for (i = 0; i < nspares; i++) { | |
| 2041 uint64_t theguid; | |
| 2042 | |
| 2043 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 2044 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 2045 if (theguid == guid) { | |
| 2046 nv = spares[i]; | |
| 2047 break; | |
| 2048 } | |
| 2049 } | |
| 2050 } | |
| 2051 | |
| 2052 /* | |
| 2053 * We only support removing a hot spare, and only if it's not currently | |
| 2054 * in use in this pool. | |
| 2055 */ | |
| 2056 if (nv == NULL && vd == NULL) { | |
| 2057 ret = ENOENT; | |
| 2058 goto out; | |
| 2059 } | |
| 2060 | |
| 2061 if (nv == NULL && vd != NULL) { | |
| 2062 ret = ENOTSUP; | |
| 2063 goto out; | |
| 2064 } | |
| 2065 | |
| 2066 if (!unspare && nv != NULL && vd != NULL) { | |
| 2067 ret = EBUSY; | |
| 2068 goto out; | |
| 2069 } | |
| 2070 | |
| 2071 if (nspares == 1) { | |
| 2072 newspares = NULL; | |
| 2073 } else { | |
| 2074 newspares = kmem_alloc((nspares - 1) * sizeof (void *), | |
| 2075 KM_SLEEP); | |
| 2076 for (i = 0, j = 0; i < nspares; i++) { | |
| 2077 if (spares[i] != nv) | |
| 2078 VERIFY(nvlist_dup(spares[i], | |
| 2079 &newspares[j++], KM_SLEEP) == 0); | |
| 2080 } | |
| 2081 } | |
| 2082 | |
| 2083 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 2084 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 2085 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 2086 newspares, nspares - 1) == 0); | |
| 2087 for (i = 0; i < nspares - 1; i++) | |
| 2088 nvlist_free(newspares[i]); | |
| 2089 kmem_free(newspares, (nspares - 1) * sizeof (void *)); | |
| 2090 spa_load_spares(spa); | |
| 2091 spa->spa_sync_spares = B_TRUE; | |
| 2092 | |
| 2093 out: | |
| 2094 spa_config_exit(spa, FTAG); | |
| 2095 | |
| 2096 return (ret); | |
| 789 | 2097 } |
| 2098 | |
| 2099 /* | |
| 1544 | 2100 * Find any device that's done replacing, so we can detach it. |
| 789 | 2101 */ |
| 1544 | 2102 static vdev_t * |
| 2103 spa_vdev_replace_done_hunt(vdev_t *vd) | |
| 789 | 2104 { |
| 1544 | 2105 vdev_t *newvd, *oldvd; |
| 789 | 2106 int c; |
| 2107 | |
| 1544 | 2108 for (c = 0; c < vd->vdev_children; c++) { |
| 2109 oldvd = spa_vdev_replace_done_hunt(vd->vdev_child[c]); | |
| 2110 if (oldvd != NULL) | |
| 2111 return (oldvd); | |
| 2112 } | |
| 789 | 2113 |
| 2114 if (vd->vdev_ops == &vdev_replacing_ops && vd->vdev_children == 2) { | |
| 1544 | 2115 oldvd = vd->vdev_child[0]; |
| 2116 newvd = vd->vdev_child[1]; | |
| 789 | 2117 |
| 1544 | 2118 mutex_enter(&newvd->vdev_dtl_lock); |
| 2119 if (newvd->vdev_dtl_map.sm_space == 0 && | |
| 2120 newvd->vdev_dtl_scrub.sm_space == 0) { | |
| 2121 mutex_exit(&newvd->vdev_dtl_lock); | |
| 2122 return (oldvd); | |
| 2123 } | |
| 2124 mutex_exit(&newvd->vdev_dtl_lock); | |
| 2125 } | |
| 789 | 2126 |
| 1544 | 2127 return (NULL); |
| 789 | 2128 } |
| 2129 | |
| 1544 | 2130 static void |
| 789 | 2131 spa_vdev_replace_done(spa_t *spa) |
| 2132 { | |
| 1544 | 2133 vdev_t *vd; |
| 2082 | 2134 vdev_t *pvd; |
| 1544 | 2135 uint64_t guid; |
| 2082 | 2136 uint64_t pguid = 0; |
| 789 | 2137 |
| 1544 | 2138 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2139 |
| 1544 | 2140 while ((vd = spa_vdev_replace_done_hunt(spa->spa_root_vdev)) != NULL) { |
| 2141 guid = vd->vdev_guid; | |
| 2082 | 2142 /* |
| 2143 * If we have just finished replacing a hot spared device, then | |
| 2144 * we need to detach the parent's first child (the original hot | |
| 2145 * spare) as well. | |
| 2146 */ | |
| 2147 pvd = vd->vdev_parent; | |
| 2148 if (pvd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
| 2149 pvd->vdev_id == 0) { | |
| 2150 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); | |
| 2151 ASSERT(pvd->vdev_parent->vdev_children == 2); | |
| 2152 pguid = pvd->vdev_parent->vdev_child[1]->vdev_guid; | |
| 2153 } | |
| 1544 | 2154 spa_config_exit(spa, FTAG); |
| 2155 if (spa_vdev_detach(spa, guid, B_TRUE) != 0) | |
| 2156 return; | |
| 2082 | 2157 if (pguid != 0 && spa_vdev_detach(spa, pguid, B_TRUE) != 0) |
| 2158 return; | |
| 1544 | 2159 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2160 } |
| 2161 | |
| 1544 | 2162 spa_config_exit(spa, FTAG); |
| 789 | 2163 } |
| 2164 | |
| 2165 /* | |
|
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2166 * Update the stored path for this vdev. Dirty the vdev configuration, relying |
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2167 * on spa_vdev_enter/exit() to synchronize the labels and cache. |
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2168 */ |
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2169 int |
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2170 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) |
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2171 { |
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2172 vdev_t *rvd, *vd; |
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2173 uint64_t txg; |
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2174 |
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2175 rvd = spa->spa_root_vdev; |
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2176 |
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2177 txg = spa_vdev_enter(spa); |
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2178 |
| 2082 | 2179 if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) { |
| 2180 /* | |
| 2181 * Determine if this is a reference to a hot spare. In that | |
| 2182 * case, update the path as stored in the spare list. | |
| 2183 */ | |
| 2184 nvlist_t **spares; | |
| 2185 uint_t i, nspares; | |
| 2186 if (spa->spa_sparelist != NULL) { | |
| 2187 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 2188 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 2189 for (i = 0; i < nspares; i++) { | |
| 2190 uint64_t theguid; | |
| 2191 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 2192 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 2193 if (theguid == guid) | |
| 2194 break; | |
| 2195 } | |
| 2196 | |
| 2197 if (i == nspares) | |
| 2198 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2199 | |
| 2200 VERIFY(nvlist_add_string(spares[i], | |
| 2201 ZPOOL_CONFIG_PATH, newpath) == 0); | |
| 2202 spa_load_spares(spa); | |
| 2203 spa->spa_sync_spares = B_TRUE; | |
| 2204 return (spa_vdev_exit(spa, NULL, txg, 0)); | |
| 2205 } else { | |
| 2206 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2207 } | |
| 2208 } | |
|
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2209 |
|
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2210 if (!vd->vdev_ops->vdev_op_leaf) |
|
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2211 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
|
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2212 |
|
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2213 spa_strfree(vd->vdev_path); |
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2214 vd->vdev_path = spa_strdup(newpath); |
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2215 |
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2216 vdev_config_dirty(vd->vdev_top); |
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2217 |
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2218 return (spa_vdev_exit(spa, NULL, txg, 0)); |
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2219 } |
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2220 |
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2221 /* |
| 789 | 2222 * ========================================================================== |
| 2223 * SPA Scrubbing | |
| 2224 * ========================================================================== | |
| 2225 */ | |
| 2226 | |
| 2227 static void | |
| 2228 spa_scrub_io_done(zio_t *zio) | |
| 2229 { | |
| 2230 spa_t *spa = zio->io_spa; | |
| 2231 | |
| 3290 | 2232 zio_data_buf_free(zio->io_data, zio->io_size); |
| 789 | 2233 |
| 2234 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2235 if (zio->io_error && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { |
|
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2236 vdev_t *vd = zio->io_vd ? zio->io_vd : spa->spa_root_vdev; |
| 789 | 2237 spa->spa_scrub_errors++; |
| 2238 mutex_enter(&vd->vdev_stat_lock); | |
| 2239 vd->vdev_stat.vs_scrub_errors++; | |
| 2240 mutex_exit(&vd->vdev_stat_lock); | |
| 2241 } | |
|
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2242 |
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2243 if (--spa->spa_scrub_inflight < spa->spa_scrub_maxinflight) |
| 1544 | 2244 cv_broadcast(&spa->spa_scrub_io_cv); |
|
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2245 |
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2246 ASSERT(spa->spa_scrub_inflight >= 0); |
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2247 |
| 1544 | 2248 mutex_exit(&spa->spa_scrub_lock); |
| 789 | 2249 } |
| 2250 | |
| 2251 static void | |
| 1544 | 2252 spa_scrub_io_start(spa_t *spa, blkptr_t *bp, int priority, int flags, |
| 2253 zbookmark_t *zb) | |
| 789 | 2254 { |
| 2255 size_t size = BP_GET_LSIZE(bp); | |
|
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2256 void *data; |
| 789 | 2257 |
| 2258 mutex_enter(&spa->spa_scrub_lock); | |
|
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2259 /* |
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2260 * Do not give too much work to vdev(s). |
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2261 */ |
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2262 while (spa->spa_scrub_inflight >= spa->spa_scrub_maxinflight) { |
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2263 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); |
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2264 } |
| 789 | 2265 spa->spa_scrub_inflight++; |
| 2266 mutex_exit(&spa->spa_scrub_lock); | |
| 2267 | |
|
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2268 data = zio_data_buf_alloc(size); |
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2269 |
| 1544 | 2270 if (zb->zb_level == -1 && BP_GET_TYPE(bp) != DMU_OT_OBJSET) |
| 2271 flags |= ZIO_FLAG_SPECULATIVE; /* intent log block */ | |
| 2272 | |
|
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2273 flags |= ZIO_FLAG_SCRUB_THREAD | ZIO_FLAG_CANFAIL; |
| 1544 | 2274 |
| 789 | 2275 zio_nowait(zio_read(NULL, spa, bp, data, size, |
| 1544 | 2276 spa_scrub_io_done, NULL, priority, flags, zb)); |
| 789 | 2277 } |
| 2278 | |
| 2279 /* ARGSUSED */ | |
| 2280 static int | |
| 2281 spa_scrub_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a) | |
| 2282 { | |
| 2283 blkptr_t *bp = &bc->bc_blkptr; | |
|
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2284 vdev_t *vd = spa->spa_root_vdev; |
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2285 dva_t *dva = bp->blk_dva; |
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2286 int needs_resilver = B_FALSE; |
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2287 int d; |
| 789 | 2288 |
|
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2289 if (bc->bc_errno) { |
| 789 | 2290 /* |
| 2291 * We can't scrub this block, but we can continue to scrub | |
| 2292 * the rest of the pool. Note the error and move along. | |
| 2293 */ | |
| 2294 mutex_enter(&spa->spa_scrub_lock); | |
| 2295 spa->spa_scrub_errors++; | |
| 2296 mutex_exit(&spa->spa_scrub_lock); | |
| 2297 | |
|
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2298 mutex_enter(&vd->vdev_stat_lock); |
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2299 vd->vdev_stat.vs_scrub_errors++; |
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2300 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2301 |
| 2302 return (ERESTART); | |
| 2303 } | |
| 2304 | |
| 2305 ASSERT(bp->blk_birth < spa->spa_scrub_maxtxg); | |
| 2306 | |
|
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2307 for (d = 0; d < BP_GET_NDVAS(bp); d++) { |
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2308 vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dva[d])); |
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2309 |
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2310 ASSERT(vd != NULL); |
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2311 |
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2312 /* |
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2313 * Keep track of how much data we've examined so that |
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2314 * zpool(1M) status can make useful progress reports. |
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2315 */ |
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2316 mutex_enter(&vd->vdev_stat_lock); |
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2317 vd->vdev_stat.vs_scrub_examined += DVA_GET_ASIZE(&dva[d]); |
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2318 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2319 |
|
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2320 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER) { |
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2321 if (DVA_GET_GANG(&dva[d])) { |
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2322 /* |
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2323 * Gang members may be spread across multiple |
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2324 * vdevs, so the best we can do is look at the |
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2325 * pool-wide DTL. |
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2326 * XXX -- it would be better to change our |
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2327 * allocation policy to ensure that this can't |
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2328 * happen. |
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2329 */ |
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2330 vd = spa->spa_root_vdev; |
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2331 } |
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2332 if (vdev_dtl_contains(&vd->vdev_dtl_map, |
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2333 bp->blk_birth, 1)) |
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2334 needs_resilver = B_TRUE; |
| 789 | 2335 } |
|
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2336 } |
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2337 |
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2338 if (spa->spa_scrub_type == POOL_SCRUB_EVERYTHING) |
| 789 | 2339 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_SCRUB, |
| 1544 | 2340 ZIO_FLAG_SCRUB, &bc->bc_bookmark); |
|
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2341 else if (needs_resilver) |
|
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2342 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_RESILVER, |
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2343 ZIO_FLAG_RESILVER, &bc->bc_bookmark); |
| 789 | 2344 |
| 2345 return (0); | |
| 2346 } | |
| 2347 | |
| 2348 static void | |
| 2349 spa_scrub_thread(spa_t *spa) | |
| 2350 { | |
| 2351 callb_cpr_t cprinfo; | |
| 2352 traverse_handle_t *th = spa->spa_scrub_th; | |
| 2353 vdev_t *rvd = spa->spa_root_vdev; | |
| 2354 pool_scrub_type_t scrub_type = spa->spa_scrub_type; | |
| 2355 int error = 0; | |
| 2356 boolean_t complete; | |
| 2357 | |
| 2358 CALLB_CPR_INIT(&cprinfo, &spa->spa_scrub_lock, callb_generic_cpr, FTAG); | |
| 2359 | |
|
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2360 /* |
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2361 * If we're restarting due to a snapshot create/delete, |
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2362 * wait for that to complete. |
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2363 */ |
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2364 txg_wait_synced(spa_get_dsl(spa), 0); |
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2365 |
| 1544 | 2366 dprintf("start %s mintxg=%llu maxtxg=%llu\n", |
| 2367 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 2368 spa->spa_scrub_mintxg, spa->spa_scrub_maxtxg); | |
| 2369 | |
| 2370 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2371 vdev_reopen(rvd); /* purge all vdev caches */ | |
| 789 | 2372 vdev_config_dirty(rvd); /* rewrite all disk labels */ |
| 2373 vdev_scrub_stat_update(rvd, scrub_type, B_FALSE); | |
| 1544 | 2374 spa_config_exit(spa, FTAG); |
| 789 | 2375 |
| 2376 mutex_enter(&spa->spa_scrub_lock); | |
| 2377 spa->spa_scrub_errors = 0; | |
| 2378 spa->spa_scrub_active = 1; | |
| 1544 | 2379 ASSERT(spa->spa_scrub_inflight == 0); |
| 789 | 2380 |
| 2381 while (!spa->spa_scrub_stop) { | |
| 2382 CALLB_CPR_SAFE_BEGIN(&cprinfo); | |
| 1544 | 2383 while (spa->spa_scrub_suspended) { |
| 789 | 2384 spa->spa_scrub_active = 0; |
| 2385 cv_broadcast(&spa->spa_scrub_cv); | |
| 2386 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2387 spa->spa_scrub_active = 1; | |
| 2388 } | |
| 2389 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_scrub_lock); | |
| 2390 | |
| 2391 if (spa->spa_scrub_restart_txg != 0) | |
| 2392 break; | |
| 2393 | |
| 2394 mutex_exit(&spa->spa_scrub_lock); | |
| 2395 error = traverse_more(th); | |
| 2396 mutex_enter(&spa->spa_scrub_lock); | |
| 2397 if (error != EAGAIN) | |
| 2398 break; | |
| 2399 } | |
| 2400 | |
| 2401 while (spa->spa_scrub_inflight) | |
| 2402 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2403 | |
|
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2404 spa->spa_scrub_active = 0; |
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2405 cv_broadcast(&spa->spa_scrub_cv); |
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2406 |
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2407 mutex_exit(&spa->spa_scrub_lock); |
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2408 |
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2409 spa_config_enter(spa, RW_WRITER, FTAG); |
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2410 |
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2411 mutex_enter(&spa->spa_scrub_lock); |
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2412 |
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2413 /* |
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2414 * Note: we check spa_scrub_restart_txg under both spa_scrub_lock |
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2415 * AND the spa config lock to synchronize with any config changes |
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2416 * that revise the DTLs under spa_vdev_enter() / spa_vdev_exit(). |
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2417 */ |
| 789 | 2418 if (spa->spa_scrub_restart_txg != 0) |
| 2419 error = ERESTART; | |
| 2420 | |
| 1544 | 2421 if (spa->spa_scrub_stop) |
| 2422 error = EINTR; | |
| 2423 | |
| 789 | 2424 /* |
| 1544 | 2425 * Even if there were uncorrectable errors, we consider the scrub |
| 2426 * completed. The downside is that if there is a transient error during | |
| 2427 * a resilver, we won't resilver the data properly to the target. But | |
| 2428 * if the damage is permanent (more likely) we will resilver forever, | |
| 2429 * which isn't really acceptable. Since there is enough information for | |
| 2430 * the user to know what has failed and why, this seems like a more | |
| 2431 * tractable approach. | |
| 789 | 2432 */ |
| 1544 | 2433 complete = (error == 0); |
| 789 | 2434 |
| 1544 | 2435 dprintf("end %s to maxtxg=%llu %s, traverse=%d, %llu errors, stop=%u\n", |
| 2436 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 789 | 2437 spa->spa_scrub_maxtxg, complete ? "done" : "FAILED", |
| 2438 error, spa->spa_scrub_errors, spa->spa_scrub_stop); | |
| 2439 | |
| 2440 mutex_exit(&spa->spa_scrub_lock); | |
| 2441 | |
| 2442 /* | |
| 2443 * If the scrub/resilver completed, update all DTLs to reflect this. | |
| 2444 * Whether it succeeded or not, vacate all temporary scrub DTLs. | |
| 2445 */ | |
| 2446 vdev_dtl_reassess(rvd, spa_last_synced_txg(spa) + 1, | |
| 2447 complete ? spa->spa_scrub_maxtxg : 0, B_TRUE); | |
| 2448 vdev_scrub_stat_update(rvd, POOL_SCRUB_NONE, complete); | |
| 1544 | 2449 spa_errlog_rotate(spa); |
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2450 |
| 1544 | 2451 spa_config_exit(spa, FTAG); |
| 789 | 2452 |
| 2453 mutex_enter(&spa->spa_scrub_lock); | |
| 2454 | |
| 1544 | 2455 /* |
| 2456 * We may have finished replacing a device. | |
| 2457 * Let the async thread assess this and handle the detach. | |
| 2458 */ | |
| 2459 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); | |
| 789 | 2460 |
| 2461 /* | |
| 2462 * If we were told to restart, our final act is to start a new scrub. | |
| 2463 */ | |
| 2464 if (error == ERESTART) | |
| 1544 | 2465 spa_async_request(spa, scrub_type == POOL_SCRUB_RESILVER ? |
| 2466 SPA_ASYNC_RESILVER : SPA_ASYNC_SCRUB); | |
| 789 | 2467 |
| 1544 | 2468 spa->spa_scrub_type = POOL_SCRUB_NONE; |
| 2469 spa->spa_scrub_active = 0; | |
| 2470 spa->spa_scrub_thread = NULL; | |
| 2471 cv_broadcast(&spa->spa_scrub_cv); | |
| 789 | 2472 CALLB_CPR_EXIT(&cprinfo); /* drops &spa->spa_scrub_lock */ |
| 2473 thread_exit(); | |
| 2474 } | |
| 2475 | |
| 2476 void | |
| 2477 spa_scrub_suspend(spa_t *spa) | |
| 2478 { | |
| 2479 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2480 spa->spa_scrub_suspended++; |
| 789 | 2481 while (spa->spa_scrub_active) { |
| 2482 cv_broadcast(&spa->spa_scrub_cv); | |
| 2483 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2484 } | |
| 2485 while (spa->spa_scrub_inflight) | |
| 2486 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2487 mutex_exit(&spa->spa_scrub_lock); | |
| 2488 } | |
| 2489 | |
| 2490 void | |
| 2491 spa_scrub_resume(spa_t *spa) | |
| 2492 { | |
| 2493 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2494 ASSERT(spa->spa_scrub_suspended != 0); |
| 2495 if (--spa->spa_scrub_suspended == 0) | |
| 789 | 2496 cv_broadcast(&spa->spa_scrub_cv); |
| 2497 mutex_exit(&spa->spa_scrub_lock); | |
| 2498 } | |
| 2499 | |
| 2500 void | |
| 2501 spa_scrub_restart(spa_t *spa, uint64_t txg) | |
| 2502 { | |
| 2503 /* | |
| 2504 * Something happened (e.g. snapshot create/delete) that means | |
| 2505 * we must restart any in-progress scrubs. The itinerary will | |
| 2506 * fix this properly. | |
| 2507 */ | |
| 2508 mutex_enter(&spa->spa_scrub_lock); | |
| 2509 spa->spa_scrub_restart_txg = txg; | |
| 2510 mutex_exit(&spa->spa_scrub_lock); | |
| 2511 } | |
| 2512 | |
| 1544 | 2513 int |
| 2514 spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force) | |
| 789 | 2515 { |
| 2516 space_seg_t *ss; | |
| 2517 uint64_t mintxg, maxtxg; | |
| 2518 vdev_t *rvd = spa->spa_root_vdev; | |
| 2519 | |
| 2520 if ((uint_t)type >= POOL_SCRUB_TYPES) | |
| 2521 return (ENOTSUP); | |
| 2522 | |
| 1544 | 2523 mutex_enter(&spa->spa_scrub_lock); |
| 2524 | |
| 789 | 2525 /* |
| 2526 * If there's a scrub or resilver already in progress, stop it. | |
| 2527 */ | |
| 2528 while (spa->spa_scrub_thread != NULL) { | |
| 2529 /* | |
| 2530 * Don't stop a resilver unless forced. | |
| 2531 */ | |
| 1544 | 2532 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER && !force) { |
| 2533 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 2534 return (EBUSY); |
| 1544 | 2535 } |
| 789 | 2536 spa->spa_scrub_stop = 1; |
| 2537 cv_broadcast(&spa->spa_scrub_cv); | |
| 2538 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2539 } | |
| 2540 | |
| 2541 /* | |
| 2542 * Terminate the previous traverse. | |
| 2543 */ | |
| 2544 if (spa->spa_scrub_th != NULL) { | |
| 2545 traverse_fini(spa->spa_scrub_th); | |
| 2546 spa->spa_scrub_th = NULL; | |
| 2547 } | |
| 2548 | |
| 1544 | 2549 if (rvd == NULL) { |
| 2550 ASSERT(spa->spa_scrub_stop == 0); | |
| 2551 ASSERT(spa->spa_scrub_type == type); | |
| 2552 ASSERT(spa->spa_scrub_restart_txg == 0); | |
| 2553 mutex_exit(&spa->spa_scrub_lock); | |
| 2554 return (0); | |
| 2555 } | |
| 789 | 2556 |
| 2557 mintxg = TXG_INITIAL - 1; | |
| 2558 maxtxg = spa_last_synced_txg(spa) + 1; | |
| 2559 | |
| 1544 | 2560 mutex_enter(&rvd->vdev_dtl_lock); |
| 789 | 2561 |
| 1544 | 2562 if (rvd->vdev_dtl_map.sm_space == 0) { |
| 2563 /* | |
| 2564 * The pool-wide DTL is empty. | |
| 1732 | 2565 * If this is a resilver, there's nothing to do except |
| 2566 * check whether any in-progress replacements have completed. | |
| 1544 | 2567 */ |
| 1732 | 2568 if (type == POOL_SCRUB_RESILVER) { |
| 1544 | 2569 type = POOL_SCRUB_NONE; |
| 1732 | 2570 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); |
| 2571 } | |
| 1544 | 2572 } else { |
| 2573 /* | |
| 2574 * The pool-wide DTL is non-empty. | |
| 2575 * If this is a normal scrub, upgrade to a resilver instead. | |
| 2576 */ | |
| 2577 if (type == POOL_SCRUB_EVERYTHING) | |
| 2578 type = POOL_SCRUB_RESILVER; | |
| 2579 } | |
| 789 | 2580 |
| 1544 | 2581 if (type == POOL_SCRUB_RESILVER) { |
| 789 | 2582 /* |
| 2583 * Determine the resilvering boundaries. | |
| 2584 * | |
| 2585 * Note: (mintxg, maxtxg) is an open interval, | |
| 2586 * i.e. mintxg and maxtxg themselves are not included. | |
| 2587 * | |
| 2588 * Note: for maxtxg, we MIN with spa_last_synced_txg(spa) + 1 | |
| 2589 * so we don't claim to resilver a txg that's still changing. | |
| 2590 */ | |
| 2591 ss = avl_first(&rvd->vdev_dtl_map.sm_root); | |
| 1544 | 2592 mintxg = ss->ss_start - 1; |
| 789 | 2593 ss = avl_last(&rvd->vdev_dtl_map.sm_root); |
| 1544 | 2594 maxtxg = MIN(ss->ss_end, maxtxg); |
| 789 | 2595 } |
| 2596 | |
| 1544 | 2597 mutex_exit(&rvd->vdev_dtl_lock); |
| 2598 | |
| 2599 spa->spa_scrub_stop = 0; | |
| 2600 spa->spa_scrub_type = type; | |
| 2601 spa->spa_scrub_restart_txg = 0; | |
| 2602 | |
| 2603 if (type != POOL_SCRUB_NONE) { | |
| 2604 spa->spa_scrub_mintxg = mintxg; | |
| 789 | 2605 spa->spa_scrub_maxtxg = maxtxg; |
| 2606 spa->spa_scrub_th = traverse_init(spa, spa_scrub_cb, NULL, | |
|
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2607 ADVANCE_PRE | ADVANCE_PRUNE | ADVANCE_ZIL, |
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2608 ZIO_FLAG_CANFAIL); |
| 789 | 2609 traverse_add_pool(spa->spa_scrub_th, mintxg, maxtxg); |
| 2610 spa->spa_scrub_thread = thread_create(NULL, 0, | |
| 2611 spa_scrub_thread, spa, 0, &p0, TS_RUN, minclsyspri); | |
| 2612 } | |
| 2613 | |
| 1544 | 2614 mutex_exit(&spa->spa_scrub_lock); |
| 2615 | |
| 789 | 2616 return (0); |
| 2617 } | |
| 2618 | |
| 1544 | 2619 /* |
| 2620 * ========================================================================== | |
| 2621 * SPA async task processing | |
| 2622 * ========================================================================== | |
| 2623 */ | |
| 2624 | |
| 2625 static void | |
| 2626 spa_async_reopen(spa_t *spa) | |
| 789 | 2627 { |
| 1544 | 2628 vdev_t *rvd = spa->spa_root_vdev; |
| 2629 vdev_t *tvd; | |
| 2630 int c; | |
| 2631 | |
| 2632 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2633 | |
| 2634 for (c = 0; c < rvd->vdev_children; c++) { | |
| 2635 tvd = rvd->vdev_child[c]; | |
| 2636 if (tvd->vdev_reopen_wanted) { | |
| 2637 tvd->vdev_reopen_wanted = 0; | |
| 2638 vdev_reopen(tvd); | |
| 2639 } | |
| 2640 } | |
| 789 | 2641 |
| 1544 | 2642 spa_config_exit(spa, FTAG); |
| 2643 } | |
| 2644 | |
| 2645 static void | |
| 2646 spa_async_thread(spa_t *spa) | |
| 2647 { | |
| 2648 int tasks; | |
| 2649 | |
| 2650 ASSERT(spa->spa_sync_on); | |
| 789 | 2651 |
| 1544 | 2652 mutex_enter(&spa->spa_async_lock); |
| 2653 tasks = spa->spa_async_tasks; | |
| 2654 spa->spa_async_tasks = 0; | |
| 2655 mutex_exit(&spa->spa_async_lock); | |
| 2656 | |
| 2657 /* | |
|
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2658 * See if the config needs to be updated. |
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2659 */ |
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2660 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { |
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2661 mutex_enter(&spa_namespace_lock); |
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2662 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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2663 mutex_exit(&spa_namespace_lock); |
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2664 } |
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2665 |
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2666 /* |
| 1544 | 2667 * See if any devices need to be reopened. |
| 2668 */ | |
| 2669 if (tasks & SPA_ASYNC_REOPEN) | |
| 2670 spa_async_reopen(spa); | |
| 2671 | |
| 2672 /* | |
| 2673 * If any devices are done replacing, detach them. | |
| 2674 */ | |
| 2675 if (tasks & SPA_ASYNC_REPLACE_DONE) | |
| 789 | 2676 spa_vdev_replace_done(spa); |
| 2677 | |
| 1544 | 2678 /* |
| 2679 * Kick off a scrub. | |
| 2680 */ | |
| 2681 if (tasks & SPA_ASYNC_SCRUB) | |
| 2682 VERIFY(spa_scrub(spa, POOL_SCRUB_EVERYTHING, B_TRUE) == 0); | |
| 2683 | |
| 2684 /* | |
| 2685 * Kick off a resilver. | |
| 2686 */ | |
| 2687 if (tasks & SPA_ASYNC_RESILVER) | |
| 2688 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 2689 | |
| 2690 /* | |
| 2691 * Let the world know that we're done. | |
| 2692 */ | |
| 2693 mutex_enter(&spa->spa_async_lock); | |
| 2694 spa->spa_async_thread = NULL; | |
| 2695 cv_broadcast(&spa->spa_async_cv); | |
| 2696 mutex_exit(&spa->spa_async_lock); | |
| 2697 thread_exit(); | |
| 2698 } | |
| 2699 | |
| 2700 void | |
| 2701 spa_async_suspend(spa_t *spa) | |
| 2702 { | |
| 2703 mutex_enter(&spa->spa_async_lock); | |
| 2704 spa->spa_async_suspended++; | |
| 2705 while (spa->spa_async_thread != NULL) | |
| 2706 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); | |
| 2707 mutex_exit(&spa->spa_async_lock); | |
| 2708 } | |
| 2709 | |
| 2710 void | |
| 2711 spa_async_resume(spa_t *spa) | |
| 2712 { | |
| 2713 mutex_enter(&spa->spa_async_lock); | |
| 2714 ASSERT(spa->spa_async_suspended != 0); | |
| 2715 spa->spa_async_suspended--; | |
| 2716 mutex_exit(&spa->spa_async_lock); | |
| 2717 } | |
| 2718 | |
| 2719 static void | |
| 2720 spa_async_dispatch(spa_t *spa) | |
| 2721 { | |
| 2722 mutex_enter(&spa->spa_async_lock); | |
| 2723 if (spa->spa_async_tasks && !spa->spa_async_suspended && | |
|
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2724 spa->spa_async_thread == NULL && |
|
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2725 rootdir != NULL && !vn_is_readonly(rootdir)) |
| 1544 | 2726 spa->spa_async_thread = thread_create(NULL, 0, |
| 2727 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); | |
| 2728 mutex_exit(&spa->spa_async_lock); | |
| 2729 } | |
| 2730 | |
| 2731 void | |
| 2732 spa_async_request(spa_t *spa, int task) | |
| 2733 { | |
| 2734 mutex_enter(&spa->spa_async_lock); | |
| 2735 spa->spa_async_tasks |= task; | |
| 2736 mutex_exit(&spa->spa_async_lock); | |
| 789 | 2737 } |
| 2738 | |
| 2739 /* | |
| 2740 * ========================================================================== | |
| 2741 * SPA syncing routines | |
| 2742 * ========================================================================== | |
| 2743 */ | |
| 2744 | |
| 2745 static void | |
| 2746 spa_sync_deferred_frees(spa_t *spa, uint64_t txg) | |
| 2747 { | |
| 2748 bplist_t *bpl = &spa->spa_sync_bplist; | |
| 2749 dmu_tx_t *tx; | |
| 2750 blkptr_t blk; | |
| 2751 uint64_t itor = 0; | |
| 2752 zio_t *zio; | |
| 2753 int error; | |
| 2754 uint8_t c = 1; | |
| 2755 | |
| 2756 zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CONFIG_HELD); | |
| 2757 | |
| 2758 while (bplist_iterate(bpl, &itor, &blk) == 0) | |
| 2759 zio_nowait(zio_free(zio, spa, txg, &blk, NULL, NULL)); | |
| 2760 | |
| 2761 error = zio_wait(zio); | |
| 2762 ASSERT3U(error, ==, 0); | |
| 2763 | |
| 2764 tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
| 2765 bplist_vacate(bpl, tx); | |
| 2766 | |
| 2767 /* | |
| 2768 * Pre-dirty the first block so we sync to convergence faster. | |
| 2769 * (Usually only the first block is needed.) | |
| 2770 */ | |
| 2771 dmu_write(spa->spa_meta_objset, spa->spa_sync_bplist_obj, 0, 1, &c, tx); | |
| 2772 dmu_tx_commit(tx); | |
| 2773 } | |
| 2774 | |
| 2775 static void | |
| 2082 | 2776 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) |
| 2777 { | |
| 2778 char *packed = NULL; | |
| 2779 size_t nvsize = 0; | |
| 2780 dmu_buf_t *db; | |
| 2781 | |
| 2782 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); | |
| 2783 | |
| 2784 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 2785 | |
| 2786 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, | |
| 2787 KM_SLEEP) == 0); | |
| 2788 | |
| 2789 dmu_write(spa->spa_meta_objset, obj, 0, nvsize, packed, tx); | |
| 2790 | |
| 2791 kmem_free(packed, nvsize); | |
| 2792 | |
| 2793 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 2794 dmu_buf_will_dirty(db, tx); | |
| 2795 *(uint64_t *)db->db_data = nvsize; | |
| 2796 dmu_buf_rele(db, FTAG); | |
| 2797 } | |
| 2798 | |
| 2799 static void | |
| 2800 spa_sync_spares(spa_t *spa, dmu_tx_t *tx) | |
| 2801 { | |
| 2802 nvlist_t *nvroot; | |
| 2803 nvlist_t **spares; | |
| 2804 int i; | |
| 2805 | |
| 2806 if (!spa->spa_sync_spares) | |
| 2807 return; | |
| 2808 | |
| 2809 /* | |
| 2810 * Update the MOS nvlist describing the list of available spares. | |
| 2811 * spa_validate_spares() will have already made sure this nvlist is | |
| 2812 * valid and the vdevs are labelled appropriately. | |
| 2813 */ | |
| 2814 if (spa->spa_spares_object == 0) { | |
| 2815 spa->spa_spares_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 2816 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 2817 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 2818 VERIFY(zap_update(spa->spa_meta_objset, | |
| 2819 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SPARES, | |
| 2820 sizeof (uint64_t), 1, &spa->spa_spares_object, tx) == 0); | |
| 2821 } | |
| 2822 | |
| 2823 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 2824 if (spa->spa_nspares == 0) { | |
| 2825 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2826 NULL, 0) == 0); | |
| 2827 } else { | |
| 2828 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), | |
| 2829 KM_SLEEP); | |
| 2830 for (i = 0; i < spa->spa_nspares; i++) | |
| 2831 spares[i] = vdev_config_generate(spa, | |
| 2832 spa->spa_spares[i], B_FALSE, B_TRUE); | |
| 2833 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2834 spares, spa->spa_nspares) == 0); | |
| 2835 for (i = 0; i < spa->spa_nspares; i++) | |
| 2836 nvlist_free(spares[i]); | |
| 2837 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 2838 } | |
| 2839 | |
| 2840 spa_sync_nvlist(spa, spa->spa_spares_object, nvroot, tx); | |
| 2926 | 2841 nvlist_free(nvroot); |
| 2082 | 2842 |
| 2843 spa->spa_sync_spares = B_FALSE; | |
| 2844 } | |
| 2845 | |
| 2846 static void | |
| 789 | 2847 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) |
| 2848 { | |
| 2849 nvlist_t *config; | |
| 2850 | |
| 2851 if (list_is_empty(&spa->spa_dirty_list)) | |
| 2852 return; | |
| 2853 | |
| 2854 config = spa_config_generate(spa, NULL, dmu_tx_get_txg(tx), B_FALSE); | |
| 2855 | |
|
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2856 if (spa->spa_config_syncing) |
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2857 nvlist_free(spa->spa_config_syncing); |
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2858 spa->spa_config_syncing = config; |
| 789 | 2859 |
| 2082 | 2860 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); |
| 789 | 2861 } |
| 2862 | |
| 3912 | 2863 static void |
| 2864 spa_sync_props(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 2865 { | |
| 2866 spa_t *spa = arg1; | |
| 2867 nvlist_t *nvp = arg2; | |
| 2868 nvpair_t *nvpair; | |
| 2869 objset_t *mos = spa->spa_meta_objset; | |
| 2870 uint64_t zapobj; | |
| 2871 | |
| 2872 mutex_enter(&spa->spa_props_lock); | |
| 2873 if (spa->spa_pool_props_object == 0) { | |
| 2874 zapobj = zap_create(mos, DMU_OT_POOL_PROPS, DMU_OT_NONE, 0, tx); | |
| 2875 VERIFY(zapobj > 0); | |
| 2876 | |
| 2877 spa->spa_pool_props_object = zapobj; | |
| 2878 | |
| 2879 VERIFY(zap_update(mos, DMU_POOL_DIRECTORY_OBJECT, | |
| 2880 DMU_POOL_PROPS, 8, 1, | |
| 2881 &spa->spa_pool_props_object, tx) == 0); | |
| 2882 } | |
| 2883 mutex_exit(&spa->spa_props_lock); | |
| 2884 | |
| 2885 nvpair = NULL; | |
| 2886 while ((nvpair = nvlist_next_nvpair(nvp, nvpair))) { | |
| 2887 switch (zpool_name_to_prop(nvpair_name(nvpair))) { | |
| 2888 case ZFS_PROP_BOOTFS: | |
| 2889 VERIFY(nvlist_lookup_uint64(nvp, | |
| 2890 nvpair_name(nvpair), &spa->spa_bootfs) == 0); | |
| 2891 VERIFY(zap_update(mos, | |
| 2892 spa->spa_pool_props_object, | |
| 2893 zpool_prop_to_name(ZFS_PROP_BOOTFS), 8, 1, | |
| 2894 &spa->spa_bootfs, tx) == 0); | |
| 2895 break; | |
| 2896 } | |
| 2897 } | |
| 2898 } | |
| 2899 | |
| 789 | 2900 /* |
| 2901 * Sync the specified transaction group. New blocks may be dirtied as | |
| 2902 * part of the process, so we iterate until it converges. | |
| 2903 */ | |
| 2904 void | |
| 2905 spa_sync(spa_t *spa, uint64_t txg) | |
| 2906 { | |
| 2907 dsl_pool_t *dp = spa->spa_dsl_pool; | |
| 2908 objset_t *mos = spa->spa_meta_objset; | |
| 2909 bplist_t *bpl = &spa->spa_sync_bplist; | |
|
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2910 vdev_t *rvd = spa->spa_root_vdev; |
| 789 | 2911 vdev_t *vd; |
| 2912 dmu_tx_t *tx; | |
| 2913 int dirty_vdevs; | |
| 2914 | |
| 2915 /* | |
| 2916 * Lock out configuration changes. | |
| 2917 */ | |
| 1544 | 2918 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2919 |
| 2920 spa->spa_syncing_txg = txg; | |
| 2921 spa->spa_sync_pass = 0; | |
| 2922 | |
| 1544 | 2923 VERIFY(0 == bplist_open(bpl, mos, spa->spa_sync_bplist_obj)); |
| 789 | 2924 |
| 2082 | 2925 tx = dmu_tx_create_assigned(dp, txg); |
| 2926 | |
| 2927 /* | |
| 2928 * If we are upgrading to ZFS_VERSION_RAIDZ_DEFLATE this txg, | |
| 2929 * set spa_deflate if we have no raid-z vdevs. | |
| 2930 */ | |
| 2931 if (spa->spa_ubsync.ub_version < ZFS_VERSION_RAIDZ_DEFLATE && | |
| 2932 spa->spa_uberblock.ub_version >= ZFS_VERSION_RAIDZ_DEFLATE) { | |
| 2933 int i; | |
| 2934 | |
| 2935 for (i = 0; i < rvd->vdev_children; i++) { | |
| 2936 vd = rvd->vdev_child[i]; | |
| 2937 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) | |
| 2938 break; | |
| 2939 } | |
| 2940 if (i == rvd->vdev_children) { | |
| 2941 spa->spa_deflate = TRUE; | |
| 2942 VERIFY(0 == zap_add(spa->spa_meta_objset, | |
| 2943 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 2944 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); | |
| 2945 } | |
| 2946 } | |
| 2947 | |
| 789 | 2948 /* |
| 2949 * If anything has changed in this txg, push the deferred frees | |
| 2950 * from the previous txg. If not, leave them alone so that we | |
| 2951 * don't generate work on an otherwise idle system. | |
| 2952 */ | |
| 2953 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || | |
|
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2954 !txg_list_empty(&dp->dp_dirty_dirs, txg) || |
|
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2955 !txg_list_empty(&dp->dp_sync_tasks, txg)) |
| 789 | 2956 spa_sync_deferred_frees(spa, txg); |
| 2957 | |
| 2958 /* | |
| 2959 * Iterate to convergence. | |
| 2960 */ | |
| 2961 do { | |
| 2962 spa->spa_sync_pass++; | |
| 2963 | |
| 2964 spa_sync_config_object(spa, tx); | |
| 2082 | 2965 spa_sync_spares(spa, tx); |
| 1544 | 2966 spa_errlog_sync(spa, txg); |
| 789 | 2967 dsl_pool_sync(dp, txg); |
| 2968 | |
| 2969 dirty_vdevs = 0; | |
| 2970 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) { | |
| 2971 vdev_sync(vd, txg); | |
| 2972 dirty_vdevs++; | |
| 2973 } | |
| 2974 | |
| 2975 bplist_sync(bpl, tx); | |
| 2976 } while (dirty_vdevs); | |
| 2977 | |
| 2978 bplist_close(bpl); | |
| 2979 | |
| 2980 dprintf("txg %llu passes %d\n", txg, spa->spa_sync_pass); | |
| 2981 | |
| 2982 /* | |
| 2983 * Rewrite the vdev configuration (which includes the uberblock) | |
| 2984 * to commit the transaction group. | |
|
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2985 * |
|
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2986 * If there are any dirty vdevs, sync the uberblock to all vdevs. |
|
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2987 * Otherwise, pick a random top-level vdev that's known to be |
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2988 * visible in the config cache (see spa_vdev_add() for details). |
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2989 * If the write fails, try the next vdev until we're tried them all. |
| 789 | 2990 */ |
|
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2991 if (!list_is_empty(&spa->spa_dirty_list)) { |
|
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2992 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2993 } else { |
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2994 int children = rvd->vdev_children; |
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2995 int c0 = spa_get_random(children); |
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2996 int c; |
|
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2997 |
|
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2998 for (c = 0; c < children; c++) { |
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2999 vd = rvd->vdev_child[(c0 + c) % children]; |
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3000 if (vd->vdev_ms_array == 0) |
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3001 continue; |
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3002 if (vdev_config_sync(vd, txg) == 0) |
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3003 break; |
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3004 } |
|
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3005 if (c == children) |
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3006 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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3007 } |
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3008 |
| 2082 | 3009 dmu_tx_commit(tx); |
| 3010 | |
|
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3011 /* |
|
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3012 * Clear the dirty config list. |
|
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3013 */ |
|
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3014 while ((vd = list_head(&spa->spa_dirty_list)) != NULL) |
|
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3015 vdev_config_clean(vd); |
|
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3016 |
|
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3017 /* |
|
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3018 * Now that the new config has synced transactionally, |
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3019 * let it become visible to the config cache. |
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3020 */ |
|
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3021 if (spa->spa_config_syncing != NULL) { |
|
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3022 spa_config_set(spa, spa->spa_config_syncing); |
|
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3023 spa->spa_config_txg = txg; |
|
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3024 spa->spa_config_syncing = NULL; |
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3025 } |
| 789 | 3026 |
| 3027 /* | |
| 3028 * Make a stable copy of the fully synced uberblock. | |
| 3029 * We use this as the root for pool traversals. | |
| 3030 */ | |
| 3031 spa->spa_traverse_wanted = 1; /* tells traverse_more() to stop */ | |
| 3032 | |
| 3033 spa_scrub_suspend(spa); /* stop scrubbing and finish I/Os */ | |
| 3034 | |
| 3035 rw_enter(&spa->spa_traverse_lock, RW_WRITER); | |
| 3036 spa->spa_traverse_wanted = 0; | |
| 3037 spa->spa_ubsync = spa->spa_uberblock; | |
| 3038 rw_exit(&spa->spa_traverse_lock); | |
| 3039 | |
| 3040 spa_scrub_resume(spa); /* resume scrub with new ubsync */ | |
| 3041 | |
| 3042 /* | |
| 3043 * Clean up the ZIL records for the synced txg. | |
| 3044 */ | |
| 3045 dsl_pool_zil_clean(dp); | |
| 3046 | |
| 3047 /* | |
| 3048 * Update usable space statistics. | |
| 3049 */ | |
| 3050 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) | |
| 3051 vdev_sync_done(vd, txg); | |
| 3052 | |
| 3053 /* | |
| 3054 * It had better be the case that we didn't dirty anything | |
| 2082 | 3055 * since vdev_config_sync(). |
| 789 | 3056 */ |
| 3057 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); | |
| 3058 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); | |
| 3059 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); | |
| 3060 ASSERT(bpl->bpl_queue == NULL); | |
| 3061 | |
| 1544 | 3062 spa_config_exit(spa, FTAG); |
| 3063 | |
| 3064 /* | |
| 3065 * If any async tasks have been requested, kick them off. | |
| 3066 */ | |
| 3067 spa_async_dispatch(spa); | |
| 789 | 3068 } |
| 3069 | |
| 3070 /* | |
| 3071 * Sync all pools. We don't want to hold the namespace lock across these | |
| 3072 * operations, so we take a reference on the spa_t and drop the lock during the | |
| 3073 * sync. | |
| 3074 */ | |
| 3075 void | |
| 3076 spa_sync_allpools(void) | |
| 3077 { | |
| 3078 spa_t *spa = NULL; | |
| 3079 mutex_enter(&spa_namespace_lock); | |
| 3080 while ((spa = spa_next(spa)) != NULL) { | |
| 3081 if (spa_state(spa) != POOL_STATE_ACTIVE) | |
| 3082 continue; | |
| 3083 spa_open_ref(spa, FTAG); | |
| 3084 mutex_exit(&spa_namespace_lock); | |
| 3085 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 3086 mutex_enter(&spa_namespace_lock); | |
| 3087 spa_close(spa, FTAG); | |
| 3088 } | |
| 3089 mutex_exit(&spa_namespace_lock); | |
| 3090 } | |
| 3091 | |
| 3092 /* | |
| 3093 * ========================================================================== | |
| 3094 * Miscellaneous routines | |
| 3095 * ========================================================================== | |
| 3096 */ | |
| 3097 | |
| 3098 /* | |
| 3099 * Remove all pools in the system. | |
| 3100 */ | |
| 3101 void | |
| 3102 spa_evict_all(void) | |
| 3103 { | |
| 3104 spa_t *spa; | |
| 3105 | |
| 3106 /* | |
| 3107 * Remove all cached state. All pools should be closed now, | |
| 3108 * so every spa in the AVL tree should be unreferenced. | |
| 3109 */ | |
| 3110 mutex_enter(&spa_namespace_lock); | |
| 3111 while ((spa = spa_next(NULL)) != NULL) { | |
| 3112 /* | |
| 1544 | 3113 * Stop async tasks. The async thread may need to detach |
| 3114 * a device that's been replaced, which requires grabbing | |
| 3115 * spa_namespace_lock, so we must drop it here. | |
| 789 | 3116 */ |
| 3117 spa_open_ref(spa, FTAG); | |
| 3118 mutex_exit(&spa_namespace_lock); | |
| 1544 | 3119 spa_async_suspend(spa); |
| 789 | 3120 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); |
| 3121 mutex_enter(&spa_namespace_lock); | |
| 3122 spa_close(spa, FTAG); | |
| 3123 | |
| 3124 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 3125 spa_unload(spa); | |
| 3126 spa_deactivate(spa); | |
| 3127 } | |
| 3128 spa_remove(spa); | |
| 3129 } | |
| 3130 mutex_exit(&spa_namespace_lock); | |
| 3131 } | |
| 1544 | 3132 |
| 3133 vdev_t * | |
| 3134 spa_lookup_by_guid(spa_t *spa, uint64_t guid) | |
| 3135 { | |
| 3136 return (vdev_lookup_by_guid(spa->spa_root_vdev, guid)); | |
| 3137 } | |
| 1760 | 3138 |
| 3139 void | |
| 3140 spa_upgrade(spa_t *spa) | |
| 3141 { | |
| 3142 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 3143 | |
| 3144 /* | |
| 3145 * This should only be called for a non-faulted pool, and since a | |
| 3146 * future version would result in an unopenable pool, this shouldn't be | |
| 3147 * possible. | |
| 3148 */ | |
| 3149 ASSERT(spa->spa_uberblock.ub_version <= ZFS_VERSION); | |
| 3150 | |
| 3151 spa->spa_uberblock.ub_version = ZFS_VERSION; | |
| 3152 vdev_config_dirty(spa->spa_root_vdev); | |
| 3153 | |
| 3154 spa_config_exit(spa, FTAG); | |
| 2082 | 3155 |
| 3156 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 1760 | 3157 } |
| 2082 | 3158 |
| 3159 boolean_t | |
| 3160 spa_has_spare(spa_t *spa, uint64_t guid) | |
| 3161 { | |
| 3162 int i; | |
|
3377
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3163 uint64_t spareguid; |
| 2082 | 3164 |
| 3165 for (i = 0; i < spa->spa_nspares; i++) | |
| 3166 if (spa->spa_spares[i]->vdev_guid == guid) | |
| 3167 return (B_TRUE); | |
| 3168 | |
|
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3169 for (i = 0; i < spa->spa_pending_nspares; i++) { |
|
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3170 if (nvlist_lookup_uint64(spa->spa_pending_spares[i], |
|
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|
3171 ZPOOL_CONFIG_GUID, &spareguid) == 0 && |
|
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3172 spareguid == guid) |
|
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3173 return (B_TRUE); |
|
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3174 } |
|
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3175 |
| 2082 | 3176 return (B_FALSE); |
| 3177 } | |
| 3912 | 3178 |
| 3179 int | |
| 3180 spa_set_props(spa_t *spa, nvlist_t *nvp) | |
| 3181 { | |
| 3182 return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props, | |
| 3183 spa, nvp, 3)); | |
| 3184 } | |
| 3185 | |
| 3186 int | |
| 3187 spa_get_props(spa_t *spa, nvlist_t **nvp) | |
| 3188 { | |
| 3189 zap_cursor_t zc; | |
| 3190 zap_attribute_t za; | |
| 3191 objset_t *mos = spa->spa_meta_objset; | |
| 3192 zfs_source_t src; | |
| 3193 zfs_prop_t prop; | |
| 3194 nvlist_t *propval; | |
| 3195 uint64_t value; | |
| 3196 int err; | |
| 3197 | |
| 3198 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 3199 | |
| 3200 mutex_enter(&spa->spa_props_lock); | |
| 3201 /* If no props object, then just return empty nvlist */ | |
| 3202 if (spa->spa_pool_props_object == 0) { | |
| 3203 mutex_exit(&spa->spa_props_lock); | |
| 3204 return (0); | |
| 3205 } | |
| 3206 | |
| 3207 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); | |
| 3208 (err = zap_cursor_retrieve(&zc, &za)) == 0; | |
| 3209 zap_cursor_advance(&zc)) { | |
| 3210 | |
| 3211 if ((prop = zpool_name_to_prop(za.za_name)) == ZFS_PROP_INVAL) | |
| 3212 continue; | |
| 3213 | |
| 3214 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 3215 switch (za.za_integer_length) { | |
| 3216 case 8: | |
| 3217 if (zfs_prop_default_numeric(prop) == | |
| 3218 za.za_first_integer) | |
| 3219 src = ZFS_SRC_DEFAULT; | |
| 3220 else | |
| 3221 src = ZFS_SRC_LOCAL; | |
| 3222 value = za.za_first_integer; | |
| 3223 | |
| 3224 if (prop == ZFS_PROP_BOOTFS) { | |
| 3225 dsl_pool_t *dp; | |
| 3226 dsl_dataset_t *ds = NULL; | |
| 3227 char strval[MAXPATHLEN]; | |
| 3228 | |
| 3229 dp = spa_get_dsl(spa); | |
| 3230 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 3231 if ((err = dsl_dataset_open_obj(dp, | |
| 3232 za.za_first_integer, NULL, DS_MODE_NONE, | |
| 3233 FTAG, &ds)) != 0) { | |
| 3234 rw_exit(&dp->dp_config_rwlock); | |
| 3235 break; | |
| 3236 } | |
| 3237 dsl_dataset_name(ds, strval); | |
| 3238 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 3239 rw_exit(&dp->dp_config_rwlock); | |
| 3240 | |
| 3241 VERIFY(nvlist_add_uint64(propval, | |
| 3242 ZFS_PROP_SOURCE, src) == 0); | |
| 3243 VERIFY(nvlist_add_string(propval, | |
| 3244 ZFS_PROP_VALUE, strval) == 0); | |
| 3245 } else { | |
| 3246 VERIFY(nvlist_add_uint64(propval, | |
| 3247 ZFS_PROP_SOURCE, src) == 0); | |
| 3248 VERIFY(nvlist_add_uint64(propval, | |
| 3249 ZFS_PROP_VALUE, value) == 0); | |
| 3250 } | |
| 3251 VERIFY(nvlist_add_nvlist(*nvp, za.za_name, | |
| 3252 propval) == 0); | |
| 3253 break; | |
| 3254 } | |
| 3255 nvlist_free(propval); | |
| 3256 } | |
| 3257 zap_cursor_fini(&zc); | |
| 3258 mutex_exit(&spa->spa_props_lock); | |
| 3259 if (err && err != ENOENT) { | |
| 3260 nvlist_free(*nvp); | |
| 3261 return (err); | |
| 3262 } | |
| 3263 | |
| 3264 return (0); | |
| 3265 } | |
| 3266 | |
| 3267 /* | |
| 3268 * If the bootfs property value is dsobj, clear it. | |
| 3269 */ | |
| 3270 void | |
| 3271 spa_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) | |
| 3272 { | |
| 3273 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { | |
| 3274 VERIFY(zap_remove(spa->spa_meta_objset, | |
| 3275 spa->spa_pool_props_object, | |
| 3276 zpool_prop_to_name(ZFS_PROP_BOOTFS), tx) == 0); | |
| 3277 spa->spa_bootfs = 0; | |
| 3278 } | |
| 3279 } |