Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/spa.c @ 2417:694d5de97348
6444346 zfs promote fails in zone
6448371 'zfs promote' of a volume clone fails with EBUSY
6450292 unmount original file system, 'zfs promote' cause system panic.
6451124 assertion failed: rc->rc_count >= number
6451412 renaming snapshot with 'mv' makes unmounting snapshot impossible
| author | ahrens |
|---|---|
| date | Sat, 22 Jul 2006 14:30:52 -0700 |
| parents | e640bebc73b3 |
| children | 6f4d5ee1906a |
| 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 2006 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> | |
| 51 #include <sys/unique.h> | |
| 52 #include <sys/dsl_pool.h> | |
| 53 #include <sys/dsl_dir.h> | |
| 54 #include <sys/dsl_prop.h> | |
| 55 #include <sys/fs/zfs.h> | |
| 56 #include <sys/callb.h> | |
| 57 | |
| 58 /* | |
| 59 * ========================================================================== | |
| 60 * SPA state manipulation (open/create/destroy/import/export) | |
| 61 * ========================================================================== | |
| 62 */ | |
| 63 | |
| 1544 | 64 static int |
| 65 spa_error_entry_compare(const void *a, const void *b) | |
| 66 { | |
| 67 spa_error_entry_t *sa = (spa_error_entry_t *)a; | |
| 68 spa_error_entry_t *sb = (spa_error_entry_t *)b; | |
| 69 int ret; | |
| 70 | |
| 71 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, | |
| 72 sizeof (zbookmark_t)); | |
| 73 | |
| 74 if (ret < 0) | |
| 75 return (-1); | |
| 76 else if (ret > 0) | |
| 77 return (1); | |
| 78 else | |
| 79 return (0); | |
| 80 } | |
| 81 | |
| 82 /* | |
| 83 * Utility function which retrieves copies of the current logs and | |
| 84 * re-initializes them in the process. | |
| 85 */ | |
| 86 void | |
| 87 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) | |
| 88 { | |
| 89 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); | |
| 90 | |
| 91 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); | |
| 92 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); | |
| 93 | |
| 94 avl_create(&spa->spa_errlist_scrub, | |
| 95 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 96 offsetof(spa_error_entry_t, se_avl)); | |
| 97 avl_create(&spa->spa_errlist_last, | |
| 98 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 99 offsetof(spa_error_entry_t, se_avl)); | |
| 100 } | |
| 101 | |
| 789 | 102 /* |
| 103 * Activate an uninitialized pool. | |
| 104 */ | |
| 105 static void | |
| 106 spa_activate(spa_t *spa) | |
| 107 { | |
| 108 int t; | |
| 109 | |
| 110 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); | |
| 111 | |
| 112 spa->spa_state = POOL_STATE_ACTIVE; | |
| 113 | |
| 114 spa->spa_normal_class = metaslab_class_create(); | |
| 115 | |
| 116 for (t = 0; t < ZIO_TYPES; t++) { | |
| 117 spa->spa_zio_issue_taskq[t] = taskq_create("spa_zio_issue", | |
| 118 8, maxclsyspri, 50, INT_MAX, | |
| 119 TASKQ_PREPOPULATE); | |
| 120 spa->spa_zio_intr_taskq[t] = taskq_create("spa_zio_intr", | |
| 121 8, maxclsyspri, 50, INT_MAX, | |
| 122 TASKQ_PREPOPULATE); | |
| 123 } | |
| 124 | |
| 125 rw_init(&spa->spa_traverse_lock, NULL, RW_DEFAULT, NULL); | |
| 126 | |
| 127 list_create(&spa->spa_dirty_list, sizeof (vdev_t), | |
| 128 offsetof(vdev_t, vdev_dirty_node)); | |
| 129 | |
| 130 txg_list_create(&spa->spa_vdev_txg_list, | |
| 131 offsetof(struct vdev, vdev_txg_node)); | |
| 1544 | 132 |
| 133 avl_create(&spa->spa_errlist_scrub, | |
| 134 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 135 offsetof(spa_error_entry_t, se_avl)); | |
| 136 avl_create(&spa->spa_errlist_last, | |
| 137 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 138 offsetof(spa_error_entry_t, se_avl)); | |
| 789 | 139 } |
| 140 | |
| 141 /* | |
| 142 * Opposite of spa_activate(). | |
| 143 */ | |
| 144 static void | |
| 145 spa_deactivate(spa_t *spa) | |
| 146 { | |
| 147 int t; | |
| 148 | |
| 149 ASSERT(spa->spa_sync_on == B_FALSE); | |
| 150 ASSERT(spa->spa_dsl_pool == NULL); | |
| 151 ASSERT(spa->spa_root_vdev == NULL); | |
| 152 | |
| 153 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); | |
| 154 | |
| 155 txg_list_destroy(&spa->spa_vdev_txg_list); | |
| 156 | |
| 157 list_destroy(&spa->spa_dirty_list); | |
| 158 | |
| 159 rw_destroy(&spa->spa_traverse_lock); | |
| 160 | |
| 161 for (t = 0; t < ZIO_TYPES; t++) { | |
| 162 taskq_destroy(spa->spa_zio_issue_taskq[t]); | |
| 163 taskq_destroy(spa->spa_zio_intr_taskq[t]); | |
| 164 spa->spa_zio_issue_taskq[t] = NULL; | |
| 165 spa->spa_zio_intr_taskq[t] = NULL; | |
| 166 } | |
| 167 | |
| 168 metaslab_class_destroy(spa->spa_normal_class); | |
| 169 spa->spa_normal_class = NULL; | |
| 170 | |
| 1544 | 171 /* |
| 172 * If this was part of an import or the open otherwise failed, we may | |
| 173 * still have errors left in the queues. Empty them just in case. | |
| 174 */ | |
| 175 spa_errlog_drain(spa); | |
| 176 | |
| 177 avl_destroy(&spa->spa_errlist_scrub); | |
| 178 avl_destroy(&spa->spa_errlist_last); | |
| 179 | |
| 789 | 180 spa->spa_state = POOL_STATE_UNINITIALIZED; |
| 181 } | |
| 182 | |
| 183 /* | |
| 184 * Verify a pool configuration, and construct the vdev tree appropriately. This | |
| 185 * will create all the necessary vdevs in the appropriate layout, with each vdev | |
| 186 * in the CLOSED state. This will prep the pool before open/creation/import. | |
| 187 * All vdev validation is done by the vdev_alloc() routine. | |
| 188 */ | |
| 2082 | 189 static int |
| 190 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, | |
| 191 uint_t id, int atype) | |
| 789 | 192 { |
| 193 nvlist_t **child; | |
| 194 uint_t c, children; | |
| 2082 | 195 int error; |
| 196 | |
| 197 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) | |
| 198 return (error); | |
| 199 | |
| 200 if ((*vdp)->vdev_ops->vdev_op_leaf) | |
| 201 return (0); | |
| 789 | 202 |
| 203 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
| 204 &child, &children) != 0) { | |
| 2082 | 205 vdev_free(*vdp); |
| 206 *vdp = NULL; | |
| 207 return (EINVAL); | |
| 789 | 208 } |
| 209 | |
| 210 for (c = 0; c < children; c++) { | |
| 2082 | 211 vdev_t *vd; |
| 212 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, | |
| 213 atype)) != 0) { | |
| 214 vdev_free(*vdp); | |
| 215 *vdp = NULL; | |
| 216 return (error); | |
| 789 | 217 } |
| 218 } | |
| 219 | |
| 2082 | 220 ASSERT(*vdp != NULL); |
| 221 | |
| 222 return (0); | |
| 789 | 223 } |
| 224 | |
| 225 /* | |
| 226 * Opposite of spa_load(). | |
| 227 */ | |
| 228 static void | |
| 229 spa_unload(spa_t *spa) | |
| 230 { | |
| 2082 | 231 int i; |
| 232 | |
| 789 | 233 /* |
| 1544 | 234 * Stop async tasks. |
| 235 */ | |
| 236 spa_async_suspend(spa); | |
| 237 | |
| 238 /* | |
| 789 | 239 * Stop syncing. |
| 240 */ | |
| 241 if (spa->spa_sync_on) { | |
| 242 txg_sync_stop(spa->spa_dsl_pool); | |
| 243 spa->spa_sync_on = B_FALSE; | |
| 244 } | |
| 245 | |
| 246 /* | |
| 247 * Wait for any outstanding prefetch I/O to complete. | |
| 248 */ | |
| 1544 | 249 spa_config_enter(spa, RW_WRITER, FTAG); |
| 250 spa_config_exit(spa, FTAG); | |
| 789 | 251 |
| 252 /* | |
| 253 * Close the dsl pool. | |
| 254 */ | |
| 255 if (spa->spa_dsl_pool) { | |
| 256 dsl_pool_close(spa->spa_dsl_pool); | |
| 257 spa->spa_dsl_pool = NULL; | |
| 258 } | |
| 259 | |
| 260 /* | |
| 261 * Close all vdevs. | |
| 262 */ | |
|
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263 if (spa->spa_root_vdev) |
| 789 | 264 vdev_free(spa->spa_root_vdev); |
|
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265 ASSERT(spa->spa_root_vdev == NULL); |
| 1544 | 266 |
| 2082 | 267 for (i = 0; i < spa->spa_nspares; i++) |
| 268 vdev_free(spa->spa_spares[i]); | |
| 269 if (spa->spa_spares) { | |
| 270 kmem_free(spa->spa_spares, spa->spa_nspares * sizeof (void *)); | |
| 271 spa->spa_spares = NULL; | |
| 272 } | |
| 273 if (spa->spa_sparelist) { | |
| 274 nvlist_free(spa->spa_sparelist); | |
| 275 spa->spa_sparelist = NULL; | |
| 276 } | |
| 277 | |
| 1544 | 278 spa->spa_async_suspended = 0; |
| 789 | 279 } |
| 280 | |
| 281 /* | |
| 2082 | 282 * Load (or re-load) the current list of vdevs describing the active spares for |
| 283 * this pool. When this is called, we have some form of basic information in | |
| 284 * 'spa_sparelist'. We parse this into vdevs, try to open them, and then | |
| 285 * re-generate a more complete list including status information. | |
| 286 */ | |
| 287 static void | |
| 288 spa_load_spares(spa_t *spa) | |
| 289 { | |
| 290 nvlist_t **spares; | |
| 291 uint_t nspares; | |
| 292 int i; | |
| 293 | |
| 294 /* | |
| 295 * First, close and free any existing spare vdevs. | |
| 296 */ | |
| 297 for (i = 0; i < spa->spa_nspares; i++) { | |
| 298 vdev_close(spa->spa_spares[i]); | |
| 299 vdev_free(spa->spa_spares[i]); | |
| 300 } | |
| 301 if (spa->spa_spares) | |
| 302 kmem_free(spa->spa_spares, spa->spa_nspares * sizeof (void *)); | |
| 303 | |
| 304 if (spa->spa_sparelist == NULL) | |
| 305 nspares = 0; | |
| 306 else | |
| 307 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 308 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 309 | |
| 310 spa->spa_nspares = (int)nspares; | |
| 311 spa->spa_spares = NULL; | |
| 312 | |
| 313 if (nspares == 0) | |
| 314 return; | |
| 315 | |
| 316 /* | |
| 317 * Construct the array of vdevs, opening them to get status in the | |
| 318 * process. | |
| 319 */ | |
| 320 spa->spa_spares = kmem_alloc(nspares * sizeof (void *), KM_SLEEP); | |
| 321 for (i = 0; i < spa->spa_nspares; i++) { | |
| 322 vdev_t *vd; | |
| 323 | |
| 324 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 325 VDEV_ALLOC_SPARE) == 0); | |
| 326 ASSERT(vd != NULL); | |
| 327 | |
| 328 spa->spa_spares[i] = vd; | |
| 329 | |
| 330 if (vdev_open(vd) != 0) | |
| 331 continue; | |
| 332 | |
| 333 vd->vdev_top = vd; | |
| 334 (void) vdev_validate_spare(vd); | |
| 335 } | |
| 336 | |
| 337 /* | |
| 338 * Recompute the stashed list of spares, with status information | |
| 339 * this time. | |
| 340 */ | |
| 341 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 342 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 343 | |
| 344 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), KM_SLEEP); | |
| 345 for (i = 0; i < spa->spa_nspares; i++) | |
| 346 spares[i] = vdev_config_generate(spa, spa->spa_spares[i], | |
| 347 B_TRUE, B_TRUE); | |
| 348 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 349 spares, spa->spa_nspares) == 0); | |
| 350 for (i = 0; i < spa->spa_nspares; i++) | |
| 351 nvlist_free(spares[i]); | |
| 352 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 353 } | |
| 354 | |
| 355 static int | |
| 356 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) | |
| 357 { | |
| 358 dmu_buf_t *db; | |
| 359 char *packed = NULL; | |
| 360 size_t nvsize = 0; | |
| 361 int error; | |
| 362 *value = NULL; | |
| 363 | |
| 364 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 365 nvsize = *(uint64_t *)db->db_data; | |
| 366 dmu_buf_rele(db, FTAG); | |
| 367 | |
| 368 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 369 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed); | |
| 370 if (error == 0) | |
| 371 error = nvlist_unpack(packed, nvsize, value, 0); | |
| 372 kmem_free(packed, nvsize); | |
| 373 | |
| 374 return (error); | |
| 375 } | |
| 376 | |
| 377 /* | |
| 789 | 378 * Load an existing storage pool, using the pool's builtin spa_config as a |
| 1544 | 379 * source of configuration information. |
| 789 | 380 */ |
| 381 static int | |
| 1544 | 382 spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) |
| 789 | 383 { |
| 384 int error = 0; | |
| 385 nvlist_t *nvroot = NULL; | |
| 386 vdev_t *rvd; | |
| 387 uberblock_t *ub = &spa->spa_uberblock; | |
|
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388 uint64_t config_cache_txg = spa->spa_config_txg; |
| 789 | 389 uint64_t pool_guid; |
| 2082 | 390 uint64_t version; |
| 789 | 391 zio_t *zio; |
| 392 | |
| 1544 | 393 spa->spa_load_state = state; |
|
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394 |
| 789 | 395 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || |
| 1733 | 396 nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) { |
| 1544 | 397 error = EINVAL; |
| 398 goto out; | |
| 399 } | |
| 789 | 400 |
| 2082 | 401 /* |
| 402 * Versioning wasn't explicitly added to the label until later, so if | |
| 403 * it's not present treat it as the initial version. | |
| 404 */ | |
| 405 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, &version) != 0) | |
| 406 version = ZFS_VERSION_INITIAL; | |
| 407 | |
| 1733 | 408 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, |
| 409 &spa->spa_config_txg); | |
| 410 | |
|
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411 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && |
| 1544 | 412 spa_guid_exists(pool_guid, 0)) { |
| 413 error = EEXIST; | |
| 414 goto out; | |
| 415 } | |
| 789 | 416 |
|
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417 spa->spa_load_guid = pool_guid; |
|
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418 |
| 789 | 419 /* |
| 2082 | 420 * Parse the configuration into a vdev tree. We explicitly set the |
| 421 * value that will be returned by spa_version() since parsing the | |
| 422 * configuration requires knowing the version number. | |
| 789 | 423 */ |
| 1544 | 424 spa_config_enter(spa, RW_WRITER, FTAG); |
| 2082 | 425 spa->spa_ubsync.ub_version = version; |
| 426 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_LOAD); | |
| 1544 | 427 spa_config_exit(spa, FTAG); |
| 789 | 428 |
| 2082 | 429 if (error != 0) |
| 1544 | 430 goto out; |
| 789 | 431 |
|
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diff
changeset
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432 ASSERT(spa->spa_root_vdev == rvd); |
| 789 | 433 ASSERT(spa_guid(spa) == pool_guid); |
| 434 | |
| 435 /* | |
| 436 * Try to open all vdevs, loading each label in the process. | |
| 437 */ | |
| 1544 | 438 if (vdev_open(rvd) != 0) { |
| 439 error = ENXIO; | |
| 440 goto out; | |
| 441 } | |
| 789 | 442 |
| 443 /* | |
|
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diff
changeset
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444 * Validate the labels for all leaf vdevs. We need to grab the config |
|
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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diff
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445 * lock because all label I/O is done with the ZIO_FLAG_CONFIG_HELD |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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446 * flag. |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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447 */ |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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448 spa_config_enter(spa, RW_READER, FTAG); |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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449 error = vdev_validate(rvd); |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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450 spa_config_exit(spa, FTAG); |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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451 |
|
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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452 if (error != 0) { |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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453 error = EBADF; |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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454 goto out; |
|
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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1807
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|
455 } |
|
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6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
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456 |
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457 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
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458 error = ENXIO; |
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459 goto out; |
|
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460 } |
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461 |
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462 /* |
| 789 | 463 * Find the best uberblock. |
| 464 */ | |
| 465 bzero(ub, sizeof (uberblock_t)); | |
| 466 | |
| 467 zio = zio_root(spa, NULL, NULL, | |
| 468 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); | |
| 469 vdev_uberblock_load(zio, rvd, ub); | |
| 470 error = zio_wait(zio); | |
| 471 | |
| 472 /* | |
| 473 * If we weren't able to find a single valid uberblock, return failure. | |
| 474 */ | |
| 475 if (ub->ub_txg == 0) { | |
| 1760 | 476 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 477 VDEV_AUX_CORRUPT_DATA); | |
| 1544 | 478 error = ENXIO; |
| 479 goto out; | |
| 480 } | |
| 481 | |
| 482 /* | |
| 483 * If the pool is newer than the code, we can't open it. | |
| 484 */ | |
| 1760 | 485 if (ub->ub_version > ZFS_VERSION) { |
| 486 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 487 VDEV_AUX_VERSION_NEWER); | |
| 1544 | 488 error = ENOTSUP; |
| 489 goto out; | |
| 789 | 490 } |
| 491 | |
| 492 /* | |
| 493 * If the vdev guid sum doesn't match the uberblock, we have an | |
| 494 * incomplete configuration. | |
| 495 */ | |
| 1732 | 496 if (rvd->vdev_guid_sum != ub->ub_guid_sum && mosconfig) { |
| 1544 | 497 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 498 VDEV_AUX_BAD_GUID_SUM); | |
| 499 error = ENXIO; | |
| 500 goto out; | |
| 789 | 501 } |
| 502 | |
| 503 /* | |
| 504 * Initialize internal SPA structures. | |
| 505 */ | |
| 506 spa->spa_state = POOL_STATE_ACTIVE; | |
| 507 spa->spa_ubsync = spa->spa_uberblock; | |
| 508 spa->spa_first_txg = spa_last_synced_txg(spa) + 1; | |
| 1544 | 509 error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool); |
| 510 if (error) { | |
| 511 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 512 VDEV_AUX_CORRUPT_DATA); | |
| 513 goto out; | |
| 514 } | |
| 789 | 515 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; |
| 516 | |
| 1544 | 517 if (zap_lookup(spa->spa_meta_objset, |
| 789 | 518 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 519 sizeof (uint64_t), 1, &spa->spa_config_object) != 0) { |
| 520 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 521 VDEV_AUX_CORRUPT_DATA); | |
| 522 error = EIO; | |
| 523 goto out; | |
| 524 } | |
| 789 | 525 |
| 526 if (!mosconfig) { | |
| 2082 | 527 nvlist_t *newconfig; |
| 528 | |
| 529 if (load_nvlist(spa, spa->spa_config_object, &newconfig) != 0) { | |
| 1544 | 530 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 531 VDEV_AUX_CORRUPT_DATA); | |
| 532 error = EIO; | |
| 533 goto out; | |
| 534 } | |
| 789 | 535 |
| 536 spa_config_set(spa, newconfig); | |
| 537 spa_unload(spa); | |
| 538 spa_deactivate(spa); | |
| 539 spa_activate(spa); | |
| 540 | |
| 1544 | 541 return (spa_load(spa, newconfig, state, B_TRUE)); |
| 542 } | |
| 543 | |
| 544 if (zap_lookup(spa->spa_meta_objset, | |
| 545 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, | |
| 546 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj) != 0) { | |
| 547 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 548 VDEV_AUX_CORRUPT_DATA); | |
| 549 error = EIO; | |
| 550 goto out; | |
| 789 | 551 } |
| 552 | |
| 1544 | 553 /* |
| 2082 | 554 * Load the bit that tells us to use the new accounting function |
| 555 * (raid-z deflation). If we have an older pool, this will not | |
| 556 * be present. | |
| 557 */ | |
| 558 error = zap_lookup(spa->spa_meta_objset, | |
| 559 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 560 sizeof (uint64_t), 1, &spa->spa_deflate); | |
| 561 if (error != 0 && error != ENOENT) { | |
| 562 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 563 VDEV_AUX_CORRUPT_DATA); | |
| 564 error = EIO; | |
| 565 goto out; | |
| 566 } | |
| 567 | |
| 568 /* | |
| 1544 | 569 * Load the persistent error log. If we have an older pool, this will |
| 570 * not be present. | |
| 571 */ | |
| 572 error = zap_lookup(spa->spa_meta_objset, | |
| 573 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_LAST, | |
| 574 sizeof (uint64_t), 1, &spa->spa_errlog_last); | |
|
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575 if (error != 0 && error != ENOENT) { |
| 1544 | 576 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 577 VDEV_AUX_CORRUPT_DATA); | |
| 578 error = EIO; | |
| 579 goto out; | |
| 580 } | |
| 581 | |
| 582 error = zap_lookup(spa->spa_meta_objset, | |
| 583 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_SCRUB, | |
| 584 sizeof (uint64_t), 1, &spa->spa_errlog_scrub); | |
| 585 if (error != 0 && error != ENOENT) { | |
| 586 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 587 VDEV_AUX_CORRUPT_DATA); | |
| 588 error = EIO; | |
| 589 goto out; | |
| 590 } | |
| 789 | 591 |
| 592 /* | |
| 2082 | 593 * Load any hot spares for this pool. |
| 594 */ | |
| 595 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, | |
| 596 DMU_POOL_SPARES, sizeof (uint64_t), 1, &spa->spa_spares_object); | |
| 597 if (error != 0 && error != ENOENT) { | |
| 598 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 599 VDEV_AUX_CORRUPT_DATA); | |
| 600 error = EIO; | |
| 601 goto out; | |
| 602 } | |
| 603 if (error == 0) { | |
| 604 ASSERT(spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 605 if (load_nvlist(spa, spa->spa_spares_object, | |
| 606 &spa->spa_sparelist) != 0) { | |
| 607 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 608 VDEV_AUX_CORRUPT_DATA); | |
| 609 error = EIO; | |
| 610 goto out; | |
| 611 } | |
| 612 | |
| 613 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 614 spa_load_spares(spa); | |
| 615 spa_config_exit(spa, FTAG); | |
| 616 } | |
| 617 | |
| 618 /* | |
|
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619 * Load the vdev state for all toplevel vdevs. |
| 789 | 620 */ |
|
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621 vdev_load(rvd); |
| 789 | 622 |
| 623 /* | |
| 624 * Propagate the leaf DTLs we just loaded all the way up the tree. | |
| 625 */ | |
| 1544 | 626 spa_config_enter(spa, RW_WRITER, FTAG); |
| 789 | 627 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); |
| 1544 | 628 spa_config_exit(spa, FTAG); |
| 789 | 629 |
| 630 /* | |
| 631 * Check the state of the root vdev. If it can't be opened, it | |
| 632 * indicates one or more toplevel vdevs are faulted. | |
| 633 */ | |
| 1544 | 634 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
| 635 error = ENXIO; | |
| 636 goto out; | |
| 637 } | |
| 789 | 638 |
| 1544 | 639 if ((spa_mode & FWRITE) && state != SPA_LOAD_TRYIMPORT) { |
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640 dmu_tx_t *tx; |
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641 int need_update = B_FALSE; |
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642 int c; |
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643 |
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644 /* |
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645 * Claim log blocks that haven't been committed yet. |
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646 * This must all happen in a single txg. |
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647 */ |
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648 tx = dmu_tx_create_assigned(spa_get_dsl(spa), |
| 789 | 649 spa_first_txg(spa)); |
| 2417 | 650 (void) dmu_objset_find(spa->spa_name, |
| 651 zil_claim, tx, DS_FIND_CHILDREN); | |
| 789 | 652 dmu_tx_commit(tx); |
| 653 | |
| 654 spa->spa_sync_on = B_TRUE; | |
| 655 txg_sync_start(spa->spa_dsl_pool); | |
| 656 | |
| 657 /* | |
| 658 * Wait for all claims to sync. | |
| 659 */ | |
| 660 txg_wait_synced(spa->spa_dsl_pool, 0); | |
|
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661 |
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662 /* |
|
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663 * If the config cache is stale, or we have uninitialized |
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664 * metaslabs (see spa_vdev_add()), then update the config. |
|
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665 */ |
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666 if (config_cache_txg != spa->spa_config_txg || |
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667 state == SPA_LOAD_IMPORT) |
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668 need_update = B_TRUE; |
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669 |
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670 for (c = 0; c < rvd->vdev_children; c++) |
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671 if (rvd->vdev_child[c]->vdev_ms_array == 0) |
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672 need_update = B_TRUE; |
|
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673 |
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674 /* |
|
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675 * Update the config cache asychronously in case we're the |
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676 * root pool, in which case the config cache isn't writable yet. |
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677 */ |
|
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678 if (need_update) |
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679 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); |
| 789 | 680 } |
| 681 | |
| 1544 | 682 error = 0; |
| 683 out: | |
| 2082 | 684 if (error && error != EBADF) |
| 1544 | 685 zfs_ereport_post(FM_EREPORT_ZFS_POOL, spa, NULL, NULL, 0, 0); |
| 686 spa->spa_load_state = SPA_LOAD_NONE; | |
| 687 spa->spa_ena = 0; | |
| 688 | |
| 689 return (error); | |
| 789 | 690 } |
| 691 | |
| 692 /* | |
| 693 * Pool Open/Import | |
| 694 * | |
| 695 * The import case is identical to an open except that the configuration is sent | |
| 696 * down from userland, instead of grabbed from the configuration cache. For the | |
| 697 * case of an open, the pool configuration will exist in the | |
| 698 * POOL_STATE_UNITIALIZED state. | |
| 699 * | |
| 700 * The stats information (gen/count/ustats) is used to gather vdev statistics at | |
| 701 * the same time open the pool, without having to keep around the spa_t in some | |
| 702 * ambiguous state. | |
| 703 */ | |
| 704 static int | |
| 705 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) | |
| 706 { | |
| 707 spa_t *spa; | |
| 708 int error; | |
| 709 int loaded = B_FALSE; | |
| 710 int locked = B_FALSE; | |
| 711 | |
| 712 *spapp = NULL; | |
| 713 | |
| 714 /* | |
| 715 * As disgusting as this is, we need to support recursive calls to this | |
| 716 * function because dsl_dir_open() is called during spa_load(), and ends | |
| 717 * up calling spa_open() again. The real fix is to figure out how to | |
| 718 * avoid dsl_dir_open() calling this in the first place. | |
| 719 */ | |
| 720 if (mutex_owner(&spa_namespace_lock) != curthread) { | |
| 721 mutex_enter(&spa_namespace_lock); | |
| 722 locked = B_TRUE; | |
| 723 } | |
| 724 | |
| 725 if ((spa = spa_lookup(pool)) == NULL) { | |
| 726 if (locked) | |
| 727 mutex_exit(&spa_namespace_lock); | |
| 728 return (ENOENT); | |
| 729 } | |
| 730 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { | |
| 731 | |
| 732 spa_activate(spa); | |
| 733 | |
|
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734 error = spa_load(spa, spa->spa_config, SPA_LOAD_OPEN, B_FALSE); |
| 789 | 735 |
| 736 if (error == EBADF) { | |
| 737 /* | |
|
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738 * If vdev_validate() returns failure (indicated by |
|
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739 * EBADF), it indicates that one of the vdevs indicates |
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740 * that the pool has been exported or destroyed. If |
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741 * this is the case, the config cache is out of sync and |
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742 * we should remove the pool from the namespace. |
| 789 | 743 */ |
| 2082 | 744 zfs_post_ok(spa, NULL); |
| 789 | 745 spa_unload(spa); |
| 746 spa_deactivate(spa); | |
| 747 spa_remove(spa); | |
| 748 spa_config_sync(); | |
| 749 if (locked) | |
| 750 mutex_exit(&spa_namespace_lock); | |
| 751 return (ENOENT); | |
| 1544 | 752 } |
| 753 | |
| 754 if (error) { | |
| 789 | 755 /* |
| 756 * We can't open the pool, but we still have useful | |
| 757 * information: the state of each vdev after the | |
| 758 * attempted vdev_open(). Return this to the user. | |
| 759 */ | |
|
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760 if (config != NULL && spa->spa_root_vdev != NULL) { |
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761 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 762 *config = spa_config_generate(spa, NULL, -1ULL, |
| 763 B_TRUE); | |
|
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764 spa_config_exit(spa, FTAG); |
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765 } |
| 789 | 766 spa_unload(spa); |
| 767 spa_deactivate(spa); | |
| 1544 | 768 spa->spa_last_open_failed = B_TRUE; |
| 789 | 769 if (locked) |
| 770 mutex_exit(&spa_namespace_lock); | |
| 771 *spapp = NULL; | |
| 772 return (error); | |
| 1544 | 773 } else { |
| 774 zfs_post_ok(spa, NULL); | |
| 775 spa->spa_last_open_failed = B_FALSE; | |
| 789 | 776 } |
| 777 | |
| 778 loaded = B_TRUE; | |
| 779 } | |
| 780 | |
| 781 spa_open_ref(spa, tag); | |
| 782 if (locked) | |
| 783 mutex_exit(&spa_namespace_lock); | |
| 784 | |
| 785 *spapp = spa; | |
| 786 | |
| 787 if (config != NULL) { | |
| 1544 | 788 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 789 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
| 1544 | 790 spa_config_exit(spa, FTAG); |
| 789 | 791 } |
| 792 | |
| 793 /* | |
| 794 * If we just loaded the pool, resilver anything that's out of date. | |
| 795 */ | |
| 796 if (loaded && (spa_mode & FWRITE)) | |
| 797 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 798 | |
| 799 return (0); | |
| 800 } | |
| 801 | |
| 802 int | |
| 803 spa_open(const char *name, spa_t **spapp, void *tag) | |
| 804 { | |
| 805 return (spa_open_common(name, spapp, tag, NULL)); | |
| 806 } | |
| 807 | |
| 1544 | 808 /* |
| 809 * Lookup the given spa_t, incrementing the inject count in the process, | |
| 810 * preventing it from being exported or destroyed. | |
| 811 */ | |
| 812 spa_t * | |
| 813 spa_inject_addref(char *name) | |
| 814 { | |
| 815 spa_t *spa; | |
| 816 | |
| 817 mutex_enter(&spa_namespace_lock); | |
| 818 if ((spa = spa_lookup(name)) == NULL) { | |
| 819 mutex_exit(&spa_namespace_lock); | |
| 820 return (NULL); | |
| 821 } | |
| 822 spa->spa_inject_ref++; | |
| 823 mutex_exit(&spa_namespace_lock); | |
| 824 | |
| 825 return (spa); | |
| 826 } | |
| 827 | |
| 828 void | |
| 829 spa_inject_delref(spa_t *spa) | |
| 830 { | |
| 831 mutex_enter(&spa_namespace_lock); | |
| 832 spa->spa_inject_ref--; | |
| 833 mutex_exit(&spa_namespace_lock); | |
| 834 } | |
| 835 | |
| 2082 | 836 static void |
| 837 spa_add_spares(spa_t *spa, nvlist_t *config) | |
| 838 { | |
| 839 nvlist_t **spares; | |
| 840 uint_t i, nspares; | |
| 841 nvlist_t *nvroot; | |
| 842 uint64_t guid; | |
| 843 vdev_stat_t *vs; | |
| 844 uint_t vsc; | |
| 845 | |
| 846 if (spa->spa_nspares == 0) | |
| 847 return; | |
| 848 | |
| 849 VERIFY(nvlist_lookup_nvlist(config, | |
| 850 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); | |
| 851 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 852 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 853 if (nspares != 0) { | |
| 854 VERIFY(nvlist_add_nvlist_array(nvroot, | |
| 855 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 856 VERIFY(nvlist_lookup_nvlist_array(nvroot, | |
| 857 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 858 | |
| 859 /* | |
| 860 * Go through and find any spares which have since been | |
| 861 * repurposed as an active spare. If this is the case, update | |
| 862 * their status appropriately. | |
| 863 */ | |
| 864 for (i = 0; i < nspares; i++) { | |
| 865 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 866 ZPOOL_CONFIG_GUID, &guid) == 0); | |
| 867 if (spa_spare_inuse(guid)) { | |
| 868 VERIFY(nvlist_lookup_uint64_array( | |
| 869 spares[i], ZPOOL_CONFIG_STATS, | |
| 870 (uint64_t **)&vs, &vsc) == 0); | |
| 871 vs->vs_state = VDEV_STATE_CANT_OPEN; | |
| 872 vs->vs_aux = VDEV_AUX_SPARED; | |
| 873 } | |
| 874 } | |
| 875 } | |
| 876 } | |
| 877 | |
| 789 | 878 int |
| 1544 | 879 spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) |
| 789 | 880 { |
| 881 int error; | |
| 882 spa_t *spa; | |
| 883 | |
| 884 *config = NULL; | |
| 885 error = spa_open_common(name, &spa, FTAG, config); | |
| 886 | |
| 2082 | 887 if (spa && *config != NULL) { |
| 1544 | 888 VERIFY(nvlist_add_uint64(*config, ZPOOL_CONFIG_ERRCOUNT, |
| 889 spa_get_errlog_size(spa)) == 0); | |
| 890 | |
| 2082 | 891 spa_add_spares(spa, *config); |
| 892 } | |
| 893 | |
| 1544 | 894 /* |
| 895 * We want to get the alternate root even for faulted pools, so we cheat | |
| 896 * and call spa_lookup() directly. | |
| 897 */ | |
| 898 if (altroot) { | |
| 899 if (spa == NULL) { | |
| 900 mutex_enter(&spa_namespace_lock); | |
| 901 spa = spa_lookup(name); | |
| 902 if (spa) | |
| 903 spa_altroot(spa, altroot, buflen); | |
| 904 else | |
| 905 altroot[0] = '\0'; | |
| 906 spa = NULL; | |
| 907 mutex_exit(&spa_namespace_lock); | |
| 908 } else { | |
| 909 spa_altroot(spa, altroot, buflen); | |
| 910 } | |
| 911 } | |
| 912 | |
| 789 | 913 if (spa != NULL) |
| 914 spa_close(spa, FTAG); | |
| 915 | |
| 916 return (error); | |
| 917 } | |
| 918 | |
| 919 /* | |
| 2082 | 920 * Validate that the 'spares' array is well formed. We must have an array of |
| 921 * nvlists, each which describes a valid leaf vdev. | |
| 922 */ | |
| 923 static int | |
| 924 spa_validate_spares(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) | |
| 925 { | |
| 926 nvlist_t **spares; | |
| 927 uint_t i, nspares; | |
| 928 vdev_t *vd; | |
| 929 int error; | |
| 930 | |
| 931 /* | |
| 932 * It's acceptable to have no spares specified. | |
| 933 */ | |
| 934 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 935 &spares, &nspares) != 0) | |
| 936 return (0); | |
| 937 | |
| 938 if (nspares == 0) | |
| 939 return (EINVAL); | |
| 940 | |
| 941 /* | |
| 942 * Make sure the pool is formatted with a version that supports hot | |
| 943 * spares. | |
| 944 */ | |
| 945 if (spa_version(spa) < ZFS_VERSION_SPARES) | |
| 946 return (ENOTSUP); | |
| 947 | |
| 948 for (i = 0; i < nspares; i++) { | |
| 949 if ((error = spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 950 mode)) != 0) | |
| 951 return (error); | |
| 952 | |
| 953 if (!vd->vdev_ops->vdev_op_leaf) { | |
| 954 vdev_free(vd); | |
| 955 return (EINVAL); | |
| 956 } | |
| 957 | |
| 958 if ((error = vdev_open(vd)) != 0) { | |
| 959 vdev_free(vd); | |
| 960 return (error); | |
| 961 } | |
| 962 | |
| 963 vd->vdev_top = vd; | |
| 964 if ((error = vdev_label_spare(vd, crtxg)) != 0) { | |
| 965 vdev_free(vd); | |
| 966 return (error); | |
| 967 } | |
| 968 | |
| 969 VERIFY(nvlist_add_uint64(spares[i], ZPOOL_CONFIG_GUID, | |
| 970 vd->vdev_guid) == 0); | |
| 971 | |
| 972 vdev_free(vd); | |
| 973 } | |
| 974 | |
| 975 return (0); | |
| 976 } | |
| 977 | |
| 978 /* | |
| 789 | 979 * Pool Creation |
| 980 */ | |
| 981 int | |
|
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982 spa_create(const char *pool, nvlist_t *nvroot, const char *altroot) |
| 789 | 983 { |
| 984 spa_t *spa; | |
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985 vdev_t *rvd; |
| 789 | 986 dsl_pool_t *dp; |
| 987 dmu_tx_t *tx; | |
| 2082 | 988 int c, error = 0; |
| 789 | 989 uint64_t txg = TXG_INITIAL; |
| 2082 | 990 nvlist_t **spares; |
| 991 uint_t nspares; | |
| 789 | 992 |
| 993 /* | |
| 994 * If this pool already exists, return failure. | |
| 995 */ | |
| 996 mutex_enter(&spa_namespace_lock); | |
| 997 if (spa_lookup(pool) != NULL) { | |
| 998 mutex_exit(&spa_namespace_lock); | |
| 999 return (EEXIST); | |
| 1000 } | |
| 1001 | |
| 1002 /* | |
| 1003 * Allocate a new spa_t structure. | |
| 1004 */ | |
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1005 spa = spa_add(pool, altroot); |
| 789 | 1006 spa_activate(spa); |
| 1007 | |
| 1008 spa->spa_uberblock.ub_txg = txg - 1; | |
| 1760 | 1009 spa->spa_uberblock.ub_version = ZFS_VERSION; |
| 789 | 1010 spa->spa_ubsync = spa->spa_uberblock; |
| 1011 | |
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1012 /* |
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1013 * Create the root vdev. |
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1014 */ |
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1015 spa_config_enter(spa, RW_WRITER, FTAG); |
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1016 |
| 2082 | 1017 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); |
| 1018 | |
| 1019 ASSERT(error != 0 || rvd != NULL); | |
| 1020 ASSERT(error != 0 || spa->spa_root_vdev == rvd); | |
| 1021 | |
| 1022 if (error == 0 && rvd->vdev_children == 0) | |
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1023 error = EINVAL; |
| 2082 | 1024 |
| 1025 if (error == 0 && | |
| 1026 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && | |
| 1027 (error = spa_validate_spares(spa, nvroot, txg, | |
| 1028 VDEV_ALLOC_ADD)) == 0) { | |
| 1029 for (c = 0; c < rvd->vdev_children; c++) | |
| 1030 vdev_init(rvd->vdev_child[c], txg); | |
| 1031 vdev_config_dirty(rvd); | |
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1032 } |
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1033 |
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1034 spa_config_exit(spa, FTAG); |
| 789 | 1035 |
| 2082 | 1036 if (error != 0) { |
| 789 | 1037 spa_unload(spa); |
| 1038 spa_deactivate(spa); | |
| 1039 spa_remove(spa); | |
| 1040 mutex_exit(&spa_namespace_lock); | |
| 1041 return (error); | |
| 1042 } | |
| 1043 | |
| 2082 | 1044 /* |
| 1045 * Get the list of spares, if specified. | |
| 1046 */ | |
| 1047 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1048 &spares, &nspares) == 0) { | |
| 1049 VERIFY(nvlist_alloc(&spa->spa_sparelist, NV_UNIQUE_NAME, | |
| 1050 KM_SLEEP) == 0); | |
| 1051 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1052 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1053 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1054 spa_load_spares(spa); | |
| 1055 spa_config_exit(spa, FTAG); | |
| 1056 spa->spa_sync_spares = B_TRUE; | |
| 1057 } | |
| 1058 | |
| 789 | 1059 spa->spa_dsl_pool = dp = dsl_pool_create(spa, txg); |
| 1060 spa->spa_meta_objset = dp->dp_meta_objset; | |
| 1061 | |
| 1062 tx = dmu_tx_create_assigned(dp, txg); | |
| 1063 | |
| 1064 /* | |
| 1065 * Create the pool config object. | |
| 1066 */ | |
| 1067 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 1068 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 1069 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 1070 | |
| 1544 | 1071 if (zap_add(spa->spa_meta_objset, |
| 789 | 1072 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 1073 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { |
| 1074 cmn_err(CE_PANIC, "failed to add pool config"); | |
| 1075 } | |
| 789 | 1076 |
| 2082 | 1077 /* Newly created pools are always deflated. */ |
| 1078 spa->spa_deflate = TRUE; | |
| 1079 if (zap_add(spa->spa_meta_objset, | |
| 1080 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 1081 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { | |
| 1082 cmn_err(CE_PANIC, "failed to add deflate"); | |
| 1083 } | |
| 1084 | |
| 789 | 1085 /* |
| 1086 * Create the deferred-free bplist object. Turn off compression | |
| 1087 * because sync-to-convergence takes longer if the blocksize | |
| 1088 * keeps changing. | |
| 1089 */ | |
| 1090 spa->spa_sync_bplist_obj = bplist_create(spa->spa_meta_objset, | |
| 1091 1 << 14, tx); | |
| 1092 dmu_object_set_compress(spa->spa_meta_objset, spa->spa_sync_bplist_obj, | |
| 1093 ZIO_COMPRESS_OFF, tx); | |
| 1094 | |
| 1544 | 1095 if (zap_add(spa->spa_meta_objset, |
| 789 | 1096 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, |
| 1544 | 1097 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj, tx) != 0) { |
| 1098 cmn_err(CE_PANIC, "failed to add bplist"); | |
| 1099 } | |
| 789 | 1100 |
| 1101 dmu_tx_commit(tx); | |
| 1102 | |
| 1103 spa->spa_sync_on = B_TRUE; | |
| 1104 txg_sync_start(spa->spa_dsl_pool); | |
| 1105 | |
| 1106 /* | |
| 1107 * We explicitly wait for the first transaction to complete so that our | |
| 1108 * bean counters are appropriately updated. | |
| 1109 */ | |
| 1110 txg_wait_synced(spa->spa_dsl_pool, txg); | |
| 1111 | |
| 1112 spa_config_sync(); | |
| 1113 | |
| 1114 mutex_exit(&spa_namespace_lock); | |
| 1115 | |
| 1116 return (0); | |
| 1117 } | |
| 1118 | |
| 1119 /* | |
| 1120 * Import the given pool into the system. We set up the necessary spa_t and | |
| 1121 * then call spa_load() to do the dirty work. | |
| 1122 */ | |
| 1123 int | |
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1124 spa_import(const char *pool, nvlist_t *config, const char *altroot) |
| 789 | 1125 { |
| 1126 spa_t *spa; | |
| 1127 int error; | |
| 2082 | 1128 nvlist_t *nvroot; |
| 1129 nvlist_t **spares; | |
| 1130 uint_t nspares; | |
| 789 | 1131 |
| 1132 if (!(spa_mode & FWRITE)) | |
| 1133 return (EROFS); | |
| 1134 | |
| 1135 /* | |
| 1136 * If a pool with this name exists, return failure. | |
| 1137 */ | |
| 1138 mutex_enter(&spa_namespace_lock); | |
| 1139 if (spa_lookup(pool) != NULL) { | |
| 1140 mutex_exit(&spa_namespace_lock); | |
| 1141 return (EEXIST); | |
| 1142 } | |
| 1143 | |
| 1144 /* | |
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1145 * Create and initialize the spa structure. |
| 789 | 1146 */ |
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1147 spa = spa_add(pool, altroot); |
| 789 | 1148 spa_activate(spa); |
| 1149 | |
| 1150 /* | |
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1151 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1152 * Pass TRUE for mosconfig because the user-supplied config |
| 1153 * is actually the one to trust when doing an import. | |
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1154 */ |
| 1732 | 1155 error = spa_load(spa, config, SPA_LOAD_IMPORT, B_TRUE); |
| 789 | 1156 |
| 2082 | 1157 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1158 /* | |
| 1159 * Toss any existing sparelist, as it doesn't have any validity anymore, | |
| 1160 * and conflicts with spa_has_spare(). | |
| 1161 */ | |
| 1162 if (spa->spa_sparelist) { | |
| 1163 nvlist_free(spa->spa_sparelist); | |
| 1164 spa->spa_sparelist = NULL; | |
| 1165 spa_load_spares(spa); | |
| 1166 } | |
| 1167 | |
| 1168 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
| 1169 &nvroot) == 0); | |
| 1170 if (error == 0) | |
| 1171 error = spa_validate_spares(spa, nvroot, -1ULL, | |
| 1172 VDEV_ALLOC_SPARE); | |
| 1173 spa_config_exit(spa, FTAG); | |
| 1174 | |
| 1175 if (error != 0) { | |
| 789 | 1176 spa_unload(spa); |
| 1177 spa_deactivate(spa); | |
| 1178 spa_remove(spa); | |
| 1179 mutex_exit(&spa_namespace_lock); | |
| 1180 return (error); | |
| 1181 } | |
| 1182 | |
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1183 /* |
| 2082 | 1184 * Override any spares as specified by the user, as these may have |
| 1185 * correct device names/devids, etc. | |
| 1186 */ | |
| 1187 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1188 &spares, &nspares) == 0) { | |
| 1189 if (spa->spa_sparelist) | |
| 1190 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1191 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1192 else | |
| 1193 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1194 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1195 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1196 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1197 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1198 spa_load_spares(spa); | |
| 1199 spa_config_exit(spa, FTAG); | |
| 1200 spa->spa_sync_spares = B_TRUE; | |
| 1201 } | |
| 1202 | |
| 1203 /* | |
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1204 * Update the config cache to include the newly-imported pool. |
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1205 */ |
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1206 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1207 |
| 789 | 1208 mutex_exit(&spa_namespace_lock); |
| 1209 | |
| 1210 /* | |
| 1211 * Resilver anything that's out of date. | |
| 1212 */ | |
| 1213 if (spa_mode & FWRITE) | |
| 1214 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1215 | |
| 1216 return (0); | |
| 1217 } | |
| 1218 | |
| 1219 /* | |
| 1220 * This (illegal) pool name is used when temporarily importing a spa_t in order | |
| 1221 * to get the vdev stats associated with the imported devices. | |
| 1222 */ | |
| 1223 #define TRYIMPORT_NAME "$import" | |
| 1224 | |
| 1225 nvlist_t * | |
| 1226 spa_tryimport(nvlist_t *tryconfig) | |
| 1227 { | |
| 1228 nvlist_t *config = NULL; | |
| 1229 char *poolname; | |
| 1230 spa_t *spa; | |
| 1231 uint64_t state; | |
| 1232 | |
| 1233 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) | |
| 1234 return (NULL); | |
| 1235 | |
| 1236 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) | |
| 1237 return (NULL); | |
| 1238 | |
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1239 /* |
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1240 * Create and initialize the spa structure. |
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1241 */ |
| 789 | 1242 mutex_enter(&spa_namespace_lock); |
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1243 spa = spa_add(TRYIMPORT_NAME, NULL); |
| 789 | 1244 spa_activate(spa); |
| 1245 | |
| 1246 /* | |
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1247 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1248 * Pass TRUE for mosconfig because the user-supplied config |
| 1249 * is actually the one to trust when doing an import. | |
| 789 | 1250 */ |
| 1732 | 1251 (void) spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE); |
| 789 | 1252 |
| 1253 /* | |
| 1254 * If 'tryconfig' was at least parsable, return the current config. | |
| 1255 */ | |
| 1256 if (spa->spa_root_vdev != NULL) { | |
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1257 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 1258 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
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1259 spa_config_exit(spa, FTAG); |
| 789 | 1260 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, |
| 1261 poolname) == 0); | |
| 1262 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
| 1263 state) == 0); | |
| 2082 | 1264 |
| 1265 /* | |
| 1266 * Add the list of hot spares. | |
| 1267 */ | |
| 1268 spa_add_spares(spa, config); | |
| 789 | 1269 } |
| 1270 | |
| 1271 spa_unload(spa); | |
| 1272 spa_deactivate(spa); | |
| 1273 spa_remove(spa); | |
| 1274 mutex_exit(&spa_namespace_lock); | |
| 1275 | |
| 1276 return (config); | |
| 1277 } | |
| 1278 | |
| 1279 /* | |
| 1280 * Pool export/destroy | |
| 1281 * | |
| 1282 * The act of destroying or exporting a pool is very simple. We make sure there | |
| 1283 * is no more pending I/O and any references to the pool are gone. Then, we | |
| 1284 * update the pool state and sync all the labels to disk, removing the | |
| 1285 * configuration from the cache afterwards. | |
| 1286 */ | |
| 1287 static int | |
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1288 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig) |
| 789 | 1289 { |
| 1290 spa_t *spa; | |
| 1291 | |
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1292 if (oldconfig) |
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1293 *oldconfig = NULL; |
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1294 |
| 789 | 1295 if (!(spa_mode & FWRITE)) |
| 1296 return (EROFS); | |
| 1297 | |
| 1298 mutex_enter(&spa_namespace_lock); | |
| 1299 if ((spa = spa_lookup(pool)) == NULL) { | |
| 1300 mutex_exit(&spa_namespace_lock); | |
| 1301 return (ENOENT); | |
| 1302 } | |
| 1303 | |
| 1304 /* | |
| 1544 | 1305 * Put a hold on the pool, drop the namespace lock, stop async tasks, |
| 1306 * reacquire the namespace lock, and see if we can export. | |
| 1307 */ | |
| 1308 spa_open_ref(spa, FTAG); | |
| 1309 mutex_exit(&spa_namespace_lock); | |
| 1310 spa_async_suspend(spa); | |
| 1311 mutex_enter(&spa_namespace_lock); | |
| 1312 spa_close(spa, FTAG); | |
| 1313 | |
| 1314 /* | |
| 789 | 1315 * The pool will be in core if it's openable, |
| 1316 * in which case we can modify its state. | |
| 1317 */ | |
| 1318 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { | |
| 1319 /* | |
| 1320 * Objsets may be open only because they're dirty, so we | |
| 1321 * have to force it to sync before checking spa_refcnt. | |
| 1322 */ | |
| 1323 spa_scrub_suspend(spa); | |
| 1324 txg_wait_synced(spa->spa_dsl_pool, 0); | |
| 1325 | |
| 1544 | 1326 /* |
| 1327 * A pool cannot be exported or destroyed if there are active | |
| 1328 * references. If we are resetting a pool, allow references by | |
| 1329 * fault injection handlers. | |
| 1330 */ | |
| 1331 if (!spa_refcount_zero(spa) || | |
| 1332 (spa->spa_inject_ref != 0 && | |
| 1333 new_state != POOL_STATE_UNINITIALIZED)) { | |
| 789 | 1334 spa_scrub_resume(spa); |
| 1544 | 1335 spa_async_resume(spa); |
| 789 | 1336 mutex_exit(&spa_namespace_lock); |
| 1337 return (EBUSY); | |
| 1338 } | |
| 1339 | |
| 1340 spa_scrub_resume(spa); | |
| 1341 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); | |
| 1342 | |
| 1343 /* | |
| 1344 * We want this to be reflected on every label, | |
| 1345 * so mark them all dirty. spa_unload() will do the | |
| 1346 * final sync that pushes these changes out. | |
| 1347 */ | |
| 1544 | 1348 if (new_state != POOL_STATE_UNINITIALIZED) { |
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1349 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1544 | 1350 spa->spa_state = new_state; |
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1351 spa->spa_final_txg = spa_last_synced_txg(spa) + 1; |
| 1544 | 1352 vdev_config_dirty(spa->spa_root_vdev); |
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1353 spa_config_exit(spa, FTAG); |
| 1544 | 1354 } |
| 789 | 1355 } |
| 1356 | |
| 1357 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 1358 spa_unload(spa); | |
| 1359 spa_deactivate(spa); | |
| 1360 } | |
| 1361 | |
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1362 if (oldconfig && spa->spa_config) |
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1363 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); |
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1364 |
| 1544 | 1365 if (new_state != POOL_STATE_UNINITIALIZED) { |
| 1366 spa_remove(spa); | |
| 1367 spa_config_sync(); | |
| 1368 } | |
| 789 | 1369 mutex_exit(&spa_namespace_lock); |
| 1370 | |
| 1371 return (0); | |
| 1372 } | |
| 1373 | |
| 1374 /* | |
| 1375 * Destroy a storage pool. | |
| 1376 */ | |
| 1377 int | |
| 1378 spa_destroy(char *pool) | |
| 1379 { | |
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1380 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL)); |
| 789 | 1381 } |
| 1382 | |
| 1383 /* | |
| 1384 * Export a storage pool. | |
| 1385 */ | |
| 1386 int | |
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1387 spa_export(char *pool, nvlist_t **oldconfig) |
| 789 | 1388 { |
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1389 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig)); |
| 789 | 1390 } |
| 1391 | |
| 1392 /* | |
| 1544 | 1393 * Similar to spa_export(), this unloads the spa_t without actually removing it |
| 1394 * from the namespace in any way. | |
| 1395 */ | |
| 1396 int | |
| 1397 spa_reset(char *pool) | |
| 1398 { | |
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1399 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL)); |
| 1544 | 1400 } |
| 1401 | |
| 1402 | |
| 1403 /* | |
| 789 | 1404 * ========================================================================== |
| 1405 * Device manipulation | |
| 1406 * ========================================================================== | |
| 1407 */ | |
| 1408 | |
| 1409 /* | |
| 1410 * Add capacity to a storage pool. | |
| 1411 */ | |
| 1412 int | |
| 1413 spa_vdev_add(spa_t *spa, nvlist_t *nvroot) | |
| 1414 { | |
| 1415 uint64_t txg; | |
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1416 int c, error; |
| 789 | 1417 vdev_t *rvd = spa->spa_root_vdev; |
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1418 vdev_t *vd, *tvd; |
| 2082 | 1419 nvlist_t **spares; |
| 1420 uint_t i, nspares; | |
| 789 | 1421 |
| 1422 txg = spa_vdev_enter(spa); | |
| 1423 | |
| 2082 | 1424 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, |
| 1425 VDEV_ALLOC_ADD)) != 0) | |
| 1426 return (spa_vdev_exit(spa, NULL, txg, error)); | |
| 1427 | |
| 1428 if ((error = spa_validate_spares(spa, nvroot, txg, | |
| 1429 VDEV_ALLOC_ADD)) != 0) | |
| 789 | 1430 return (spa_vdev_exit(spa, vd, txg, error)); |
| 1431 | |
| 2082 | 1432 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, |
| 1433 &spares, &nspares) != 0) | |
| 1434 nspares = 0; | |
| 1435 | |
| 1436 if (vd->vdev_children == 0 && nspares == 0) | |
| 1437 return (spa_vdev_exit(spa, vd, txg, EINVAL)); | |
| 1438 | |
| 1439 if (vd->vdev_children != 0) { | |
| 1440 if ((error = vdev_create(vd, txg, B_FALSE)) != 0) | |
| 1441 return (spa_vdev_exit(spa, vd, txg, error)); | |
| 1442 | |
| 1443 /* | |
| 1444 * Transfer each new top-level vdev from vd to rvd. | |
| 1445 */ | |
| 1446 for (c = 0; c < vd->vdev_children; c++) { | |
| 1447 tvd = vd->vdev_child[c]; | |
| 1448 vdev_remove_child(vd, tvd); | |
| 1449 tvd->vdev_id = rvd->vdev_children; | |
| 1450 vdev_add_child(rvd, tvd); | |
| 1451 vdev_config_dirty(tvd); | |
| 1452 } | |
| 1453 } | |
| 1454 | |
| 1455 if (nspares != 0) { | |
| 1456 if (spa->spa_sparelist != NULL) { | |
| 1457 nvlist_t **oldspares; | |
| 1458 uint_t oldnspares; | |
| 1459 nvlist_t **newspares; | |
| 1460 | |
| 1461 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 1462 ZPOOL_CONFIG_SPARES, &oldspares, &oldnspares) == 0); | |
| 1463 | |
| 1464 newspares = kmem_alloc(sizeof (void *) * | |
| 1465 (nspares + oldnspares), KM_SLEEP); | |
| 1466 for (i = 0; i < oldnspares; i++) | |
| 1467 VERIFY(nvlist_dup(oldspares[i], | |
| 1468 &newspares[i], KM_SLEEP) == 0); | |
| 1469 for (i = 0; i < nspares; i++) | |
| 1470 VERIFY(nvlist_dup(spares[i], | |
| 1471 &newspares[i + oldnspares], | |
| 1472 KM_SLEEP) == 0); | |
| 1473 | |
| 1474 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1475 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1476 | |
| 1477 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1478 ZPOOL_CONFIG_SPARES, newspares, | |
| 1479 nspares + oldnspares) == 0); | |
| 1480 for (i = 0; i < oldnspares + nspares; i++) | |
| 1481 nvlist_free(newspares[i]); | |
| 1482 kmem_free(newspares, (oldnspares + nspares) * | |
| 1483 sizeof (void *)); | |
| 1484 } else { | |
| 1485 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1486 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1487 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1488 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1489 } | |
| 1490 | |
| 1491 spa_load_spares(spa); | |
| 1492 spa->spa_sync_spares = B_TRUE; | |
| 789 | 1493 } |
| 1494 | |
| 1495 /* | |
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1496 * We have to be careful when adding new vdevs to an existing pool. |
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1497 * If other threads start allocating from these vdevs before we |
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1498 * sync the config cache, and we lose power, then upon reboot we may |
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1499 * fail to open the pool because there are DVAs that the config cache |
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1500 * can't translate. Therefore, we first add the vdevs without |
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1501 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); |
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1502 * and then let spa_config_update() initialize the new metaslabs. |
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1503 * |
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1504 * spa_load() checks for added-but-not-initialized vdevs, so that |
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1505 * if we lose power at any point in this sequence, the remaining |
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1506 * steps will be completed the next time we load the pool. |
| 789 | 1507 */ |
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1508 (void) spa_vdev_exit(spa, vd, txg, 0); |
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1509 |
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1510 mutex_enter(&spa_namespace_lock); |
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1511 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1512 mutex_exit(&spa_namespace_lock); |
| 789 | 1513 |
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1514 return (0); |
| 789 | 1515 } |
| 1516 | |
| 1517 /* | |
| 1518 * Attach a device to a mirror. The arguments are the path to any device | |
| 1519 * in the mirror, and the nvroot for the new device. If the path specifies | |
| 1520 * a device that is not mirrored, we automatically insert the mirror vdev. | |
| 1521 * | |
| 1522 * If 'replacing' is specified, the new device is intended to replace the | |
| 1523 * existing device; in this case the two devices are made into their own | |
| 1524 * mirror using the 'replacing' vdev, which is functionally idendical to | |
| 1525 * the mirror vdev (it actually reuses all the same ops) but has a few | |
| 1526 * extra rules: you can't attach to it after it's been created, and upon | |
| 1527 * completion of resilvering, the first disk (the one being replaced) | |
| 1528 * is automatically detached. | |
| 1529 */ | |
| 1530 int | |
| 1544 | 1531 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) |
| 789 | 1532 { |
| 1533 uint64_t txg, open_txg; | |
| 1534 int error; | |
| 1535 vdev_t *rvd = spa->spa_root_vdev; | |
| 1536 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; | |
| 2082 | 1537 vdev_ops_t *pvops; |
| 789 | 1538 |
| 1539 txg = spa_vdev_enter(spa); | |
| 1540 | |
| 1544 | 1541 oldvd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1542 |
| 1543 if (oldvd == NULL) | |
| 1544 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1545 | |
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1546 if (!oldvd->vdev_ops->vdev_op_leaf) |
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1547 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1548 |
| 789 | 1549 pvd = oldvd->vdev_parent; |
| 1550 | |
| 2082 | 1551 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, |
| 1552 VDEV_ALLOC_ADD)) != 0 || newrootvd->vdev_children != 1) | |
| 789 | 1553 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); |
| 1554 | |
| 1555 newvd = newrootvd->vdev_child[0]; | |
| 1556 | |
| 1557 if (!newvd->vdev_ops->vdev_op_leaf) | |
| 1558 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); | |
| 1559 | |
| 2082 | 1560 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) |
| 789 | 1561 return (spa_vdev_exit(spa, newrootvd, txg, error)); |
| 1562 | |
| 2082 | 1563 if (!replacing) { |
| 1564 /* | |
| 1565 * For attach, the only allowable parent is a mirror or the root | |
| 1566 * vdev. | |
| 1567 */ | |
| 1568 if (pvd->vdev_ops != &vdev_mirror_ops && | |
| 1569 pvd->vdev_ops != &vdev_root_ops) | |
| 1570 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1571 | |
| 1572 pvops = &vdev_mirror_ops; | |
| 1573 } else { | |
| 1574 /* | |
| 1575 * Active hot spares can only be replaced by inactive hot | |
| 1576 * spares. | |
| 1577 */ | |
| 1578 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1579 pvd->vdev_child[1] == oldvd && | |
| 1580 !spa_has_spare(spa, newvd->vdev_guid)) | |
| 1581 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1582 | |
| 1583 /* | |
| 1584 * If the source is a hot spare, and the parent isn't already a | |
| 1585 * spare, then we want to create a new hot spare. Otherwise, we | |
| 1586 * want to create a replacing vdev. | |
| 1587 */ | |
| 1588 if (pvd->vdev_ops == &vdev_replacing_ops) | |
| 1589 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1590 else if (pvd->vdev_ops != &vdev_spare_ops && | |
| 1591 newvd->vdev_isspare) | |
| 1592 pvops = &vdev_spare_ops; | |
| 1593 else | |
| 1594 pvops = &vdev_replacing_ops; | |
| 1595 } | |
| 1596 | |
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1597 /* |
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1598 * Compare the new device size with the replaceable/attachable |
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1599 * device size. |
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1600 */ |
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1601 if (newvd->vdev_psize < vdev_get_rsize(oldvd)) |
| 789 | 1602 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); |
| 1603 | |
| 1732 | 1604 /* |
| 1605 * The new device cannot have a higher alignment requirement | |
| 1606 * than the top-level vdev. | |
| 1607 */ | |
| 1608 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) | |
| 789 | 1609 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); |
| 1610 | |
| 1611 /* | |
| 1612 * If this is an in-place replacement, update oldvd's path and devid | |
| 1613 * to make it distinguishable from newvd, and unopenable from now on. | |
| 1614 */ | |
| 1615 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { | |
| 1616 spa_strfree(oldvd->vdev_path); | |
| 1617 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, | |
| 1618 KM_SLEEP); | |
| 1619 (void) sprintf(oldvd->vdev_path, "%s/%s", | |
| 1620 newvd->vdev_path, "old"); | |
| 1621 if (oldvd->vdev_devid != NULL) { | |
| 1622 spa_strfree(oldvd->vdev_devid); | |
| 1623 oldvd->vdev_devid = NULL; | |
| 1624 } | |
| 1625 } | |
| 1626 | |
| 1627 /* | |
| 2082 | 1628 * If the parent is not a mirror, or if we're replacing, insert the new |
| 1629 * mirror/replacing/spare vdev above oldvd. | |
| 789 | 1630 */ |
| 1631 if (pvd->vdev_ops != pvops) | |
| 1632 pvd = vdev_add_parent(oldvd, pvops); | |
| 1633 | |
| 1634 ASSERT(pvd->vdev_top->vdev_parent == rvd); | |
| 1635 ASSERT(pvd->vdev_ops == pvops); | |
| 1636 ASSERT(oldvd->vdev_parent == pvd); | |
| 1637 | |
| 1638 /* | |
| 1639 * Extract the new device from its root and add it to pvd. | |
| 1640 */ | |
| 1641 vdev_remove_child(newrootvd, newvd); | |
| 1642 newvd->vdev_id = pvd->vdev_children; | |
| 1643 vdev_add_child(pvd, newvd); | |
| 1644 | |
| 1544 | 1645 /* |
| 1646 * If newvd is smaller than oldvd, but larger than its rsize, | |
| 1647 * the addition of newvd may have decreased our parent's asize. | |
| 1648 */ | |
| 1649 pvd->vdev_asize = MIN(pvd->vdev_asize, newvd->vdev_asize); | |
| 1650 | |
| 789 | 1651 tvd = newvd->vdev_top; |
| 1652 ASSERT(pvd->vdev_top == tvd); | |
| 1653 ASSERT(tvd->vdev_parent == rvd); | |
| 1654 | |
| 1655 vdev_config_dirty(tvd); | |
| 1656 | |
| 1657 /* | |
| 1658 * Set newvd's DTL to [TXG_INITIAL, open_txg]. It will propagate | |
| 1659 * upward when spa_vdev_exit() calls vdev_dtl_reassess(). | |
| 1660 */ | |
| 1661 open_txg = txg + TXG_CONCURRENT_STATES - 1; | |
| 1662 | |
| 1663 mutex_enter(&newvd->vdev_dtl_lock); | |
| 1664 space_map_add(&newvd->vdev_dtl_map, TXG_INITIAL, | |
| 1665 open_txg - TXG_INITIAL + 1); | |
| 1666 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1667 | |
| 1544 | 1668 dprintf("attached %s in txg %llu\n", newvd->vdev_path, txg); |
| 1669 | |
| 789 | 1670 /* |
| 1671 * Mark newvd's DTL dirty in this txg. | |
| 1672 */ | |
| 1732 | 1673 vdev_dirty(tvd, VDD_DTL, newvd, txg); |
| 789 | 1674 |
| 1675 (void) spa_vdev_exit(spa, newrootvd, open_txg, 0); | |
| 1676 | |
| 1677 /* | |
| 1678 * Kick off a resilver to update newvd. | |
| 1679 */ | |
| 1680 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1681 | |
| 1682 return (0); | |
| 1683 } | |
| 1684 | |
| 1685 /* | |
| 1686 * Detach a device from a mirror or replacing vdev. | |
| 1687 * If 'replace_done' is specified, only detach if the parent | |
| 1688 * is a replacing vdev. | |
| 1689 */ | |
| 1690 int | |
| 1544 | 1691 spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) |
| 789 | 1692 { |
| 1693 uint64_t txg; | |
| 1694 int c, t, error; | |
| 1695 vdev_t *rvd = spa->spa_root_vdev; | |
| 1696 vdev_t *vd, *pvd, *cvd, *tvd; | |
| 2082 | 1697 boolean_t unspare = B_FALSE; |
| 1698 uint64_t unspare_guid; | |
| 789 | 1699 |
| 1700 txg = spa_vdev_enter(spa); | |
| 1701 | |
| 1544 | 1702 vd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1703 |
| 1704 if (vd == NULL) | |
| 1705 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1706 | |
|
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1707 if (!vd->vdev_ops->vdev_op_leaf) |
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1708 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
|
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1709 |
| 789 | 1710 pvd = vd->vdev_parent; |
| 1711 | |
| 1712 /* | |
| 1713 * If replace_done is specified, only remove this device if it's | |
| 2082 | 1714 * the first child of a replacing vdev. For the 'spare' vdev, either |
| 1715 * disk can be removed. | |
| 789 | 1716 */ |
| 2082 | 1717 if (replace_done) { |
| 1718 if (pvd->vdev_ops == &vdev_replacing_ops) { | |
| 1719 if (vd->vdev_id != 0) | |
| 1720 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1721 } else if (pvd->vdev_ops != &vdev_spare_ops) { | |
| 1722 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1723 } | |
| 1724 } | |
| 1725 | |
| 1726 ASSERT(pvd->vdev_ops != &vdev_spare_ops || | |
| 1727 spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 789 | 1728 |
| 1729 /* | |
| 2082 | 1730 * Only mirror, replacing, and spare vdevs support detach. |
| 789 | 1731 */ |
| 1732 if (pvd->vdev_ops != &vdev_replacing_ops && | |
| 2082 | 1733 pvd->vdev_ops != &vdev_mirror_ops && |
| 1734 pvd->vdev_ops != &vdev_spare_ops) | |
| 789 | 1735 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
| 1736 | |
| 1737 /* | |
| 1738 * If there's only one replica, you can't detach it. | |
| 1739 */ | |
| 1740 if (pvd->vdev_children <= 1) | |
| 1741 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
| 1742 | |
| 1743 /* | |
| 1744 * If all siblings have non-empty DTLs, this device may have the only | |
| 1745 * valid copy of the data, which means we cannot safely detach it. | |
| 1746 * | |
| 1747 * XXX -- as in the vdev_offline() case, we really want a more | |
| 1748 * precise DTL check. | |
| 1749 */ | |
| 1750 for (c = 0; c < pvd->vdev_children; c++) { | |
| 1751 uint64_t dirty; | |
| 1752 | |
| 1753 cvd = pvd->vdev_child[c]; | |
| 1754 if (cvd == vd) | |
| 1755 continue; | |
| 1756 if (vdev_is_dead(cvd)) | |
| 1757 continue; | |
| 1758 mutex_enter(&cvd->vdev_dtl_lock); | |
| 1759 dirty = cvd->vdev_dtl_map.sm_space | | |
| 1760 cvd->vdev_dtl_scrub.sm_space; | |
| 1761 mutex_exit(&cvd->vdev_dtl_lock); | |
| 1762 if (!dirty) | |
| 1763 break; | |
| 1764 } | |
| 2082 | 1765 |
| 1766 /* | |
| 1767 * If we are a replacing or spare vdev, then we can always detach the | |
| 1768 * latter child, as that is how one cancels the operation. | |
| 1769 */ | |
| 1770 if ((pvd->vdev_ops == &vdev_mirror_ops || vd->vdev_id != 1) && | |
| 1771 c == pvd->vdev_children) | |
| 789 | 1772 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); |
| 1773 | |
| 1774 /* | |
| 2082 | 1775 * If we are detaching the original disk from a spare, then it implies |
| 1776 * that the spare should become a real disk, and be removed from the | |
| 1777 * active spare list for the pool. | |
| 1778 */ | |
| 1779 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1780 vd->vdev_id == 0) | |
| 1781 unspare = B_TRUE; | |
| 1782 | |
| 1783 /* | |
| 789 | 1784 * Erase the disk labels so the disk can be used for other things. |
| 1785 * This must be done after all other error cases are handled, | |
| 1786 * but before we disembowel vd (so we can still do I/O to it). | |
| 1787 * But if we can't do it, don't treat the error as fatal -- | |
| 1788 * it may be that the unwritability of the disk is the reason | |
| 1789 * it's being detached! | |
| 1790 */ | |
| 2082 | 1791 error = vdev_label_init(vd, 0, B_FALSE); |
| 789 | 1792 if (error) |
| 1793 dprintf("unable to erase labels on %s\n", vdev_description(vd)); | |
| 1794 | |
| 1795 /* | |
| 1796 * Remove vd from its parent and compact the parent's children. | |
| 1797 */ | |
| 1798 vdev_remove_child(pvd, vd); | |
| 1799 vdev_compact_children(pvd); | |
| 1800 | |
| 1801 /* | |
| 1802 * Remember one of the remaining children so we can get tvd below. | |
| 1803 */ | |
| 1804 cvd = pvd->vdev_child[0]; | |
| 1805 | |
| 1806 /* | |
| 2082 | 1807 * If we need to remove the remaining child from the list of hot spares, |
| 1808 * do it now, marking the vdev as no longer a spare in the process. We | |
| 1809 * must do this before vdev_remove_parent(), because that can change the | |
| 1810 * GUID if it creates a new toplevel GUID. | |
| 1811 */ | |
| 1812 if (unspare) { | |
| 1813 ASSERT(cvd->vdev_isspare); | |
| 1814 spa_spare_remove(cvd->vdev_guid); | |
| 1815 cvd->vdev_isspare = B_FALSE; | |
| 1816 unspare_guid = cvd->vdev_guid; | |
| 1817 } | |
| 1818 | |
| 1819 /* | |
| 789 | 1820 * If the parent mirror/replacing vdev only has one child, |
| 1821 * the parent is no longer needed. Remove it from the tree. | |
| 1822 */ | |
| 1823 if (pvd->vdev_children == 1) | |
| 1824 vdev_remove_parent(cvd); | |
| 1825 | |
| 1826 /* | |
| 1827 * We don't set tvd until now because the parent we just removed | |
| 1828 * may have been the previous top-level vdev. | |
| 1829 */ | |
| 1830 tvd = cvd->vdev_top; | |
| 1831 ASSERT(tvd->vdev_parent == rvd); | |
| 1832 | |
| 1833 /* | |
| 1834 * Reopen this top-level vdev to reassess health after detach. | |
| 1835 */ | |
| 1544 | 1836 vdev_reopen(tvd); |
| 789 | 1837 |
| 1838 /* | |
| 1839 * If the device we just detached was smaller than the others, | |
| 1732 | 1840 * it may be possible to add metaslabs (i.e. grow the pool). |
| 1841 * vdev_metaslab_init() can't fail because the existing metaslabs | |
| 1842 * are already in core, so there's nothing to read from disk. | |
| 789 | 1843 */ |
| 1732 | 1844 VERIFY(vdev_metaslab_init(tvd, txg) == 0); |
| 789 | 1845 |
| 1846 vdev_config_dirty(tvd); | |
| 1847 | |
| 1848 /* | |
| 1849 * Mark vd's DTL as dirty in this txg. | |
| 1850 * vdev_dtl_sync() will see that vd->vdev_detached is set | |
| 1851 * and free vd's DTL object in syncing context. | |
| 1852 * But first make sure we're not on any *other* txg's DTL list, | |
| 1853 * to prevent vd from being accessed after it's freed. | |
| 1854 */ | |
| 1855 for (t = 0; t < TXG_SIZE; t++) | |
| 1856 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); | |
| 1732 | 1857 vd->vdev_detached = B_TRUE; |
| 1858 vdev_dirty(tvd, VDD_DTL, vd, txg); | |
| 789 | 1859 |
| 1544 | 1860 dprintf("detached %s in txg %llu\n", vd->vdev_path, txg); |
| 789 | 1861 |
| 2082 | 1862 error = spa_vdev_exit(spa, vd, txg, 0); |
| 1863 | |
| 1864 /* | |
| 1865 * If we are supposed to remove the given vdev from the list of spares, | |
| 1866 * iterate over all pools in the system and replace it if it's present. | |
| 1867 */ | |
| 1868 if (unspare) { | |
| 1869 spa = NULL; | |
| 1870 mutex_enter(&spa_namespace_lock); | |
| 1871 while ((spa = spa_next(spa)) != NULL) { | |
| 1872 if (spa->spa_state != POOL_STATE_ACTIVE) | |
| 1873 continue; | |
| 1874 | |
| 1875 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); | |
| 1876 } | |
| 1877 mutex_exit(&spa_namespace_lock); | |
| 1878 } | |
| 1879 | |
| 1880 return (error); | |
| 1881 } | |
| 1882 | |
| 1883 /* | |
| 1884 * Remove a device from the pool. Currently, this supports removing only hot | |
| 1885 * spares. | |
| 1886 */ | |
| 1887 int | |
| 1888 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) | |
| 1889 { | |
| 1890 vdev_t *vd; | |
| 1891 nvlist_t **spares, *nv, **newspares; | |
| 1892 uint_t i, j, nspares; | |
| 1893 int ret = 0; | |
| 1894 | |
| 1895 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1896 | |
| 1897 vd = spa_lookup_by_guid(spa, guid); | |
| 1898 | |
| 1899 nv = NULL; | |
| 1900 if (spa->spa_spares != NULL && | |
| 1901 nvlist_lookup_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1902 &spares, &nspares) == 0) { | |
| 1903 for (i = 0; i < nspares; i++) { | |
| 1904 uint64_t theguid; | |
| 1905 | |
| 1906 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 1907 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 1908 if (theguid == guid) { | |
| 1909 nv = spares[i]; | |
| 1910 break; | |
| 1911 } | |
| 1912 } | |
| 1913 } | |
| 1914 | |
| 1915 /* | |
| 1916 * We only support removing a hot spare, and only if it's not currently | |
| 1917 * in use in this pool. | |
| 1918 */ | |
| 1919 if (nv == NULL && vd == NULL) { | |
| 1920 ret = ENOENT; | |
| 1921 goto out; | |
| 1922 } | |
| 1923 | |
| 1924 if (nv == NULL && vd != NULL) { | |
| 1925 ret = ENOTSUP; | |
| 1926 goto out; | |
| 1927 } | |
| 1928 | |
| 1929 if (!unspare && nv != NULL && vd != NULL) { | |
| 1930 ret = EBUSY; | |
| 1931 goto out; | |
| 1932 } | |
| 1933 | |
| 1934 if (nspares == 1) { | |
| 1935 newspares = NULL; | |
| 1936 } else { | |
| 1937 newspares = kmem_alloc((nspares - 1) * sizeof (void *), | |
| 1938 KM_SLEEP); | |
| 1939 for (i = 0, j = 0; i < nspares; i++) { | |
| 1940 if (spares[i] != nv) | |
| 1941 VERIFY(nvlist_dup(spares[i], | |
| 1942 &newspares[j++], KM_SLEEP) == 0); | |
| 1943 } | |
| 1944 } | |
| 1945 | |
| 1946 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1947 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1948 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1949 newspares, nspares - 1) == 0); | |
| 1950 for (i = 0; i < nspares - 1; i++) | |
| 1951 nvlist_free(newspares[i]); | |
| 1952 kmem_free(newspares, (nspares - 1) * sizeof (void *)); | |
| 1953 spa_load_spares(spa); | |
| 1954 spa->spa_sync_spares = B_TRUE; | |
| 1955 | |
| 1956 out: | |
| 1957 spa_config_exit(spa, FTAG); | |
| 1958 | |
| 1959 return (ret); | |
| 789 | 1960 } |
| 1961 | |
| 1962 /* | |
| 1544 | 1963 * Find any device that's done replacing, so we can detach it. |
| 789 | 1964 */ |
| 1544 | 1965 static vdev_t * |
| 1966 spa_vdev_replace_done_hunt(vdev_t *vd) | |
| 789 | 1967 { |
| 1544 | 1968 vdev_t *newvd, *oldvd; |
| 789 | 1969 int c; |
| 1970 | |
| 1544 | 1971 for (c = 0; c < vd->vdev_children; c++) { |
| 1972 oldvd = spa_vdev_replace_done_hunt(vd->vdev_child[c]); | |
| 1973 if (oldvd != NULL) | |
| 1974 return (oldvd); | |
| 1975 } | |
| 789 | 1976 |
| 1977 if (vd->vdev_ops == &vdev_replacing_ops && vd->vdev_children == 2) { | |
| 1544 | 1978 oldvd = vd->vdev_child[0]; |
| 1979 newvd = vd->vdev_child[1]; | |
| 789 | 1980 |
| 1544 | 1981 mutex_enter(&newvd->vdev_dtl_lock); |
| 1982 if (newvd->vdev_dtl_map.sm_space == 0 && | |
| 1983 newvd->vdev_dtl_scrub.sm_space == 0) { | |
| 1984 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1985 return (oldvd); | |
| 1986 } | |
| 1987 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1988 } | |
| 789 | 1989 |
| 1544 | 1990 return (NULL); |
| 789 | 1991 } |
| 1992 | |
| 1544 | 1993 static void |
| 789 | 1994 spa_vdev_replace_done(spa_t *spa) |
| 1995 { | |
| 1544 | 1996 vdev_t *vd; |
| 2082 | 1997 vdev_t *pvd; |
| 1544 | 1998 uint64_t guid; |
| 2082 | 1999 uint64_t pguid = 0; |
| 789 | 2000 |
| 1544 | 2001 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2002 |
| 1544 | 2003 while ((vd = spa_vdev_replace_done_hunt(spa->spa_root_vdev)) != NULL) { |
| 2004 guid = vd->vdev_guid; | |
| 2082 | 2005 /* |
| 2006 * If we have just finished replacing a hot spared device, then | |
| 2007 * we need to detach the parent's first child (the original hot | |
| 2008 * spare) as well. | |
| 2009 */ | |
| 2010 pvd = vd->vdev_parent; | |
| 2011 if (pvd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
| 2012 pvd->vdev_id == 0) { | |
| 2013 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); | |
| 2014 ASSERT(pvd->vdev_parent->vdev_children == 2); | |
| 2015 pguid = pvd->vdev_parent->vdev_child[1]->vdev_guid; | |
| 2016 } | |
| 1544 | 2017 spa_config_exit(spa, FTAG); |
| 2018 if (spa_vdev_detach(spa, guid, B_TRUE) != 0) | |
| 2019 return; | |
| 2082 | 2020 if (pguid != 0 && spa_vdev_detach(spa, pguid, B_TRUE) != 0) |
| 2021 return; | |
| 1544 | 2022 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2023 } |
| 2024 | |
| 1544 | 2025 spa_config_exit(spa, FTAG); |
| 789 | 2026 } |
| 2027 | |
| 2028 /* | |
|
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2029 * Update the stored path for this vdev. Dirty the vdev configuration, relying |
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2030 * on spa_vdev_enter/exit() to synchronize the labels and cache. |
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2031 */ |
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2032 int |
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2033 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) |
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2034 { |
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2035 vdev_t *rvd, *vd; |
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2036 uint64_t txg; |
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2037 |
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2038 rvd = spa->spa_root_vdev; |
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2039 |
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2040 txg = spa_vdev_enter(spa); |
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2041 |
| 2082 | 2042 if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) { |
| 2043 /* | |
| 2044 * Determine if this is a reference to a hot spare. In that | |
| 2045 * case, update the path as stored in the spare list. | |
| 2046 */ | |
| 2047 nvlist_t **spares; | |
| 2048 uint_t i, nspares; | |
| 2049 if (spa->spa_sparelist != NULL) { | |
| 2050 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 2051 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 2052 for (i = 0; i < nspares; i++) { | |
| 2053 uint64_t theguid; | |
| 2054 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 2055 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 2056 if (theguid == guid) | |
| 2057 break; | |
| 2058 } | |
| 2059 | |
| 2060 if (i == nspares) | |
| 2061 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2062 | |
| 2063 VERIFY(nvlist_add_string(spares[i], | |
| 2064 ZPOOL_CONFIG_PATH, newpath) == 0); | |
| 2065 spa_load_spares(spa); | |
| 2066 spa->spa_sync_spares = B_TRUE; | |
| 2067 return (spa_vdev_exit(spa, NULL, txg, 0)); | |
| 2068 } else { | |
| 2069 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2070 } | |
| 2071 } | |
|
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2072 |
|
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2073 if (!vd->vdev_ops->vdev_op_leaf) |
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2074 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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2075 |
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2076 spa_strfree(vd->vdev_path); |
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2077 vd->vdev_path = spa_strdup(newpath); |
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2078 |
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2079 vdev_config_dirty(vd->vdev_top); |
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2080 |
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2081 return (spa_vdev_exit(spa, NULL, txg, 0)); |
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2082 } |
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2083 |
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2084 /* |
| 789 | 2085 * ========================================================================== |
| 2086 * SPA Scrubbing | |
| 2087 * ========================================================================== | |
| 2088 */ | |
| 2089 | |
| 1544 | 2090 void |
| 2091 spa_scrub_throttle(spa_t *spa, int direction) | |
| 2092 { | |
| 2093 mutex_enter(&spa->spa_scrub_lock); | |
| 2094 spa->spa_scrub_throttled += direction; | |
| 2095 ASSERT(spa->spa_scrub_throttled >= 0); | |
| 2096 if (spa->spa_scrub_throttled == 0) | |
| 2097 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 2098 mutex_exit(&spa->spa_scrub_lock); | |
| 2099 } | |
| 789 | 2100 |
| 2101 static void | |
| 2102 spa_scrub_io_done(zio_t *zio) | |
| 2103 { | |
| 2104 spa_t *spa = zio->io_spa; | |
| 2105 | |
| 2106 zio_buf_free(zio->io_data, zio->io_size); | |
| 2107 | |
| 2108 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2109 if (zio->io_error && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { |
|
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2110 vdev_t *vd = zio->io_vd ? zio->io_vd : spa->spa_root_vdev; |
| 789 | 2111 spa->spa_scrub_errors++; |
| 2112 mutex_enter(&vd->vdev_stat_lock); | |
| 2113 vd->vdev_stat.vs_scrub_errors++; | |
| 2114 mutex_exit(&vd->vdev_stat_lock); | |
| 2115 } | |
| 1544 | 2116 if (--spa->spa_scrub_inflight == 0) { |
| 2117 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 2118 ASSERT(spa->spa_scrub_throttled == 0); | |
| 2119 } | |
| 2120 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 2121 } |
| 2122 | |
| 2123 static void | |
| 1544 | 2124 spa_scrub_io_start(spa_t *spa, blkptr_t *bp, int priority, int flags, |
| 2125 zbookmark_t *zb) | |
| 789 | 2126 { |
| 2127 size_t size = BP_GET_LSIZE(bp); | |
| 2128 void *data = zio_buf_alloc(size); | |
| 2129 | |
| 2130 mutex_enter(&spa->spa_scrub_lock); | |
| 2131 spa->spa_scrub_inflight++; | |
| 2132 mutex_exit(&spa->spa_scrub_lock); | |
| 2133 | |
| 1544 | 2134 if (zb->zb_level == -1 && BP_GET_TYPE(bp) != DMU_OT_OBJSET) |
| 2135 flags |= ZIO_FLAG_SPECULATIVE; /* intent log block */ | |
| 2136 | |
|
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2137 flags |= ZIO_FLAG_SCRUB_THREAD | ZIO_FLAG_CANFAIL; |
| 1544 | 2138 |
| 789 | 2139 zio_nowait(zio_read(NULL, spa, bp, data, size, |
| 1544 | 2140 spa_scrub_io_done, NULL, priority, flags, zb)); |
| 789 | 2141 } |
| 2142 | |
| 2143 /* ARGSUSED */ | |
| 2144 static int | |
| 2145 spa_scrub_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a) | |
| 2146 { | |
| 2147 blkptr_t *bp = &bc->bc_blkptr; | |
|
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2148 vdev_t *vd = spa->spa_root_vdev; |
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2149 dva_t *dva = bp->blk_dva; |
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2150 int needs_resilver = B_FALSE; |
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2151 int d; |
| 789 | 2152 |
|
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2153 if (bc->bc_errno) { |
| 789 | 2154 /* |
| 2155 * We can't scrub this block, but we can continue to scrub | |
| 2156 * the rest of the pool. Note the error and move along. | |
| 2157 */ | |
| 2158 mutex_enter(&spa->spa_scrub_lock); | |
| 2159 spa->spa_scrub_errors++; | |
| 2160 mutex_exit(&spa->spa_scrub_lock); | |
| 2161 | |
|
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2162 mutex_enter(&vd->vdev_stat_lock); |
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2163 vd->vdev_stat.vs_scrub_errors++; |
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2164 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2165 |
| 2166 return (ERESTART); | |
| 2167 } | |
| 2168 | |
| 2169 ASSERT(bp->blk_birth < spa->spa_scrub_maxtxg); | |
| 2170 | |
|
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2171 for (d = 0; d < BP_GET_NDVAS(bp); d++) { |
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2172 vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dva[d])); |
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2173 |
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2174 ASSERT(vd != NULL); |
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2175 |
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2176 /* |
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2177 * Keep track of how much data we've examined so that |
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2178 * zpool(1M) status can make useful progress reports. |
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2179 */ |
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2180 mutex_enter(&vd->vdev_stat_lock); |
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2181 vd->vdev_stat.vs_scrub_examined += DVA_GET_ASIZE(&dva[d]); |
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2182 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2183 |
|
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2184 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER) { |
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2185 if (DVA_GET_GANG(&dva[d])) { |
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2186 /* |
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2187 * Gang members may be spread across multiple |
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2188 * vdevs, so the best we can do is look at the |
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2189 * pool-wide DTL. |
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2190 * XXX -- it would be better to change our |
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2191 * allocation policy to ensure that this can't |
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2192 * happen. |
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2193 */ |
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2194 vd = spa->spa_root_vdev; |
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2195 } |
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2196 if (vdev_dtl_contains(&vd->vdev_dtl_map, |
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2197 bp->blk_birth, 1)) |
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2198 needs_resilver = B_TRUE; |
| 789 | 2199 } |
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2200 } |
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2201 |
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2202 if (spa->spa_scrub_type == POOL_SCRUB_EVERYTHING) |
| 789 | 2203 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_SCRUB, |
| 1544 | 2204 ZIO_FLAG_SCRUB, &bc->bc_bookmark); |
|
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2205 else if (needs_resilver) |
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2206 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_RESILVER, |
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2207 ZIO_FLAG_RESILVER, &bc->bc_bookmark); |
| 789 | 2208 |
| 2209 return (0); | |
| 2210 } | |
| 2211 | |
| 2212 static void | |
| 2213 spa_scrub_thread(spa_t *spa) | |
| 2214 { | |
| 2215 callb_cpr_t cprinfo; | |
| 2216 traverse_handle_t *th = spa->spa_scrub_th; | |
| 2217 vdev_t *rvd = spa->spa_root_vdev; | |
| 2218 pool_scrub_type_t scrub_type = spa->spa_scrub_type; | |
| 2219 int error = 0; | |
| 2220 boolean_t complete; | |
| 2221 | |
| 2222 CALLB_CPR_INIT(&cprinfo, &spa->spa_scrub_lock, callb_generic_cpr, FTAG); | |
| 2223 | |
|
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2224 /* |
|
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|
2225 * If we're restarting due to a snapshot create/delete, |
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2226 * wait for that to complete. |
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2227 */ |
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2228 txg_wait_synced(spa_get_dsl(spa), 0); |
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2229 |
| 1544 | 2230 dprintf("start %s mintxg=%llu maxtxg=%llu\n", |
| 2231 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 2232 spa->spa_scrub_mintxg, spa->spa_scrub_maxtxg); | |
| 2233 | |
| 2234 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2235 vdev_reopen(rvd); /* purge all vdev caches */ | |
| 789 | 2236 vdev_config_dirty(rvd); /* rewrite all disk labels */ |
| 2237 vdev_scrub_stat_update(rvd, scrub_type, B_FALSE); | |
| 1544 | 2238 spa_config_exit(spa, FTAG); |
| 789 | 2239 |
| 2240 mutex_enter(&spa->spa_scrub_lock); | |
| 2241 spa->spa_scrub_errors = 0; | |
| 2242 spa->spa_scrub_active = 1; | |
| 1544 | 2243 ASSERT(spa->spa_scrub_inflight == 0); |
| 2244 ASSERT(spa->spa_scrub_throttled == 0); | |
| 789 | 2245 |
| 2246 while (!spa->spa_scrub_stop) { | |
| 2247 CALLB_CPR_SAFE_BEGIN(&cprinfo); | |
| 1544 | 2248 while (spa->spa_scrub_suspended) { |
| 789 | 2249 spa->spa_scrub_active = 0; |
| 2250 cv_broadcast(&spa->spa_scrub_cv); | |
| 2251 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2252 spa->spa_scrub_active = 1; | |
| 2253 } | |
| 2254 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_scrub_lock); | |
| 2255 | |
| 2256 if (spa->spa_scrub_restart_txg != 0) | |
| 2257 break; | |
| 2258 | |
| 2259 mutex_exit(&spa->spa_scrub_lock); | |
| 2260 error = traverse_more(th); | |
| 2261 mutex_enter(&spa->spa_scrub_lock); | |
| 2262 if (error != EAGAIN) | |
| 2263 break; | |
| 1544 | 2264 |
| 2265 while (spa->spa_scrub_throttled > 0) | |
| 2266 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 789 | 2267 } |
| 2268 | |
| 2269 while (spa->spa_scrub_inflight) | |
| 2270 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2271 | |
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2272 spa->spa_scrub_active = 0; |
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2273 cv_broadcast(&spa->spa_scrub_cv); |
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2274 |
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2275 mutex_exit(&spa->spa_scrub_lock); |
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2276 |
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2277 spa_config_enter(spa, RW_WRITER, FTAG); |
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2278 |
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2279 mutex_enter(&spa->spa_scrub_lock); |
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2280 |
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2281 /* |
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2282 * Note: we check spa_scrub_restart_txg under both spa_scrub_lock |
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2283 * AND the spa config lock to synchronize with any config changes |
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2284 * that revise the DTLs under spa_vdev_enter() / spa_vdev_exit(). |
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2285 */ |
| 789 | 2286 if (spa->spa_scrub_restart_txg != 0) |
| 2287 error = ERESTART; | |
| 2288 | |
| 1544 | 2289 if (spa->spa_scrub_stop) |
| 2290 error = EINTR; | |
| 2291 | |
| 789 | 2292 /* |
| 1544 | 2293 * Even if there were uncorrectable errors, we consider the scrub |
| 2294 * completed. The downside is that if there is a transient error during | |
| 2295 * a resilver, we won't resilver the data properly to the target. But | |
| 2296 * if the damage is permanent (more likely) we will resilver forever, | |
| 2297 * which isn't really acceptable. Since there is enough information for | |
| 2298 * the user to know what has failed and why, this seems like a more | |
| 2299 * tractable approach. | |
| 789 | 2300 */ |
| 1544 | 2301 complete = (error == 0); |
| 789 | 2302 |
| 1544 | 2303 dprintf("end %s to maxtxg=%llu %s, traverse=%d, %llu errors, stop=%u\n", |
| 2304 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 789 | 2305 spa->spa_scrub_maxtxg, complete ? "done" : "FAILED", |
| 2306 error, spa->spa_scrub_errors, spa->spa_scrub_stop); | |
| 2307 | |
| 2308 mutex_exit(&spa->spa_scrub_lock); | |
| 2309 | |
| 2310 /* | |
| 2311 * If the scrub/resilver completed, update all DTLs to reflect this. | |
| 2312 * Whether it succeeded or not, vacate all temporary scrub DTLs. | |
| 2313 */ | |
| 2314 vdev_dtl_reassess(rvd, spa_last_synced_txg(spa) + 1, | |
| 2315 complete ? spa->spa_scrub_maxtxg : 0, B_TRUE); | |
| 2316 vdev_scrub_stat_update(rvd, POOL_SCRUB_NONE, complete); | |
| 1544 | 2317 spa_errlog_rotate(spa); |
|
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2318 |
| 1544 | 2319 spa_config_exit(spa, FTAG); |
| 789 | 2320 |
| 2321 mutex_enter(&spa->spa_scrub_lock); | |
| 2322 | |
| 1544 | 2323 /* |
| 2324 * We may have finished replacing a device. | |
| 2325 * Let the async thread assess this and handle the detach. | |
| 2326 */ | |
| 2327 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); | |
| 789 | 2328 |
| 2329 /* | |
| 2330 * If we were told to restart, our final act is to start a new scrub. | |
| 2331 */ | |
| 2332 if (error == ERESTART) | |
| 1544 | 2333 spa_async_request(spa, scrub_type == POOL_SCRUB_RESILVER ? |
| 2334 SPA_ASYNC_RESILVER : SPA_ASYNC_SCRUB); | |
| 789 | 2335 |
| 1544 | 2336 spa->spa_scrub_type = POOL_SCRUB_NONE; |
| 2337 spa->spa_scrub_active = 0; | |
| 2338 spa->spa_scrub_thread = NULL; | |
| 2339 cv_broadcast(&spa->spa_scrub_cv); | |
| 789 | 2340 CALLB_CPR_EXIT(&cprinfo); /* drops &spa->spa_scrub_lock */ |
| 2341 thread_exit(); | |
| 2342 } | |
| 2343 | |
| 2344 void | |
| 2345 spa_scrub_suspend(spa_t *spa) | |
| 2346 { | |
| 2347 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2348 spa->spa_scrub_suspended++; |
| 789 | 2349 while (spa->spa_scrub_active) { |
| 2350 cv_broadcast(&spa->spa_scrub_cv); | |
| 2351 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2352 } | |
| 2353 while (spa->spa_scrub_inflight) | |
| 2354 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2355 mutex_exit(&spa->spa_scrub_lock); | |
| 2356 } | |
| 2357 | |
| 2358 void | |
| 2359 spa_scrub_resume(spa_t *spa) | |
| 2360 { | |
| 2361 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2362 ASSERT(spa->spa_scrub_suspended != 0); |
| 2363 if (--spa->spa_scrub_suspended == 0) | |
| 789 | 2364 cv_broadcast(&spa->spa_scrub_cv); |
| 2365 mutex_exit(&spa->spa_scrub_lock); | |
| 2366 } | |
| 2367 | |
| 2368 void | |
| 2369 spa_scrub_restart(spa_t *spa, uint64_t txg) | |
| 2370 { | |
| 2371 /* | |
| 2372 * Something happened (e.g. snapshot create/delete) that means | |
| 2373 * we must restart any in-progress scrubs. The itinerary will | |
| 2374 * fix this properly. | |
| 2375 */ | |
| 2376 mutex_enter(&spa->spa_scrub_lock); | |
| 2377 spa->spa_scrub_restart_txg = txg; | |
| 2378 mutex_exit(&spa->spa_scrub_lock); | |
| 2379 } | |
| 2380 | |
| 1544 | 2381 int |
| 2382 spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force) | |
| 789 | 2383 { |
| 2384 space_seg_t *ss; | |
| 2385 uint64_t mintxg, maxtxg; | |
| 2386 vdev_t *rvd = spa->spa_root_vdev; | |
| 2387 | |
| 2388 if ((uint_t)type >= POOL_SCRUB_TYPES) | |
| 2389 return (ENOTSUP); | |
| 2390 | |
| 1544 | 2391 mutex_enter(&spa->spa_scrub_lock); |
| 2392 | |
| 789 | 2393 /* |
| 2394 * If there's a scrub or resilver already in progress, stop it. | |
| 2395 */ | |
| 2396 while (spa->spa_scrub_thread != NULL) { | |
| 2397 /* | |
| 2398 * Don't stop a resilver unless forced. | |
| 2399 */ | |
| 1544 | 2400 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER && !force) { |
| 2401 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 2402 return (EBUSY); |
| 1544 | 2403 } |
| 789 | 2404 spa->spa_scrub_stop = 1; |
| 2405 cv_broadcast(&spa->spa_scrub_cv); | |
| 2406 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2407 } | |
| 2408 | |
| 2409 /* | |
| 2410 * Terminate the previous traverse. | |
| 2411 */ | |
| 2412 if (spa->spa_scrub_th != NULL) { | |
| 2413 traverse_fini(spa->spa_scrub_th); | |
| 2414 spa->spa_scrub_th = NULL; | |
| 2415 } | |
| 2416 | |
| 1544 | 2417 if (rvd == NULL) { |
| 2418 ASSERT(spa->spa_scrub_stop == 0); | |
| 2419 ASSERT(spa->spa_scrub_type == type); | |
| 2420 ASSERT(spa->spa_scrub_restart_txg == 0); | |
| 2421 mutex_exit(&spa->spa_scrub_lock); | |
| 2422 return (0); | |
| 2423 } | |
| 789 | 2424 |
| 2425 mintxg = TXG_INITIAL - 1; | |
| 2426 maxtxg = spa_last_synced_txg(spa) + 1; | |
| 2427 | |
| 1544 | 2428 mutex_enter(&rvd->vdev_dtl_lock); |
| 789 | 2429 |
| 1544 | 2430 if (rvd->vdev_dtl_map.sm_space == 0) { |
| 2431 /* | |
| 2432 * The pool-wide DTL is empty. | |
| 1732 | 2433 * If this is a resilver, there's nothing to do except |
| 2434 * check whether any in-progress replacements have completed. | |
| 1544 | 2435 */ |
| 1732 | 2436 if (type == POOL_SCRUB_RESILVER) { |
| 1544 | 2437 type = POOL_SCRUB_NONE; |
| 1732 | 2438 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); |
| 2439 } | |
| 1544 | 2440 } else { |
| 2441 /* | |
| 2442 * The pool-wide DTL is non-empty. | |
| 2443 * If this is a normal scrub, upgrade to a resilver instead. | |
| 2444 */ | |
| 2445 if (type == POOL_SCRUB_EVERYTHING) | |
| 2446 type = POOL_SCRUB_RESILVER; | |
| 2447 } | |
| 789 | 2448 |
| 1544 | 2449 if (type == POOL_SCRUB_RESILVER) { |
| 789 | 2450 /* |
| 2451 * Determine the resilvering boundaries. | |
| 2452 * | |
| 2453 * Note: (mintxg, maxtxg) is an open interval, | |
| 2454 * i.e. mintxg and maxtxg themselves are not included. | |
| 2455 * | |
| 2456 * Note: for maxtxg, we MIN with spa_last_synced_txg(spa) + 1 | |
| 2457 * so we don't claim to resilver a txg that's still changing. | |
| 2458 */ | |
| 2459 ss = avl_first(&rvd->vdev_dtl_map.sm_root); | |
| 1544 | 2460 mintxg = ss->ss_start - 1; |
| 789 | 2461 ss = avl_last(&rvd->vdev_dtl_map.sm_root); |
| 1544 | 2462 maxtxg = MIN(ss->ss_end, maxtxg); |
| 789 | 2463 } |
| 2464 | |
| 1544 | 2465 mutex_exit(&rvd->vdev_dtl_lock); |
| 2466 | |
| 2467 spa->spa_scrub_stop = 0; | |
| 2468 spa->spa_scrub_type = type; | |
| 2469 spa->spa_scrub_restart_txg = 0; | |
| 2470 | |
| 2471 if (type != POOL_SCRUB_NONE) { | |
| 2472 spa->spa_scrub_mintxg = mintxg; | |
| 789 | 2473 spa->spa_scrub_maxtxg = maxtxg; |
| 2474 spa->spa_scrub_th = traverse_init(spa, spa_scrub_cb, NULL, | |
|
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2475 ADVANCE_PRE | ADVANCE_PRUNE | ADVANCE_ZIL, |
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2476 ZIO_FLAG_CANFAIL); |
| 789 | 2477 traverse_add_pool(spa->spa_scrub_th, mintxg, maxtxg); |
| 2478 spa->spa_scrub_thread = thread_create(NULL, 0, | |
| 2479 spa_scrub_thread, spa, 0, &p0, TS_RUN, minclsyspri); | |
| 2480 } | |
| 2481 | |
| 1544 | 2482 mutex_exit(&spa->spa_scrub_lock); |
| 2483 | |
| 789 | 2484 return (0); |
| 2485 } | |
| 2486 | |
| 1544 | 2487 /* |
| 2488 * ========================================================================== | |
| 2489 * SPA async task processing | |
| 2490 * ========================================================================== | |
| 2491 */ | |
| 2492 | |
| 2493 static void | |
| 2494 spa_async_reopen(spa_t *spa) | |
| 789 | 2495 { |
| 1544 | 2496 vdev_t *rvd = spa->spa_root_vdev; |
| 2497 vdev_t *tvd; | |
| 2498 int c; | |
| 2499 | |
| 2500 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2501 | |
| 2502 for (c = 0; c < rvd->vdev_children; c++) { | |
| 2503 tvd = rvd->vdev_child[c]; | |
| 2504 if (tvd->vdev_reopen_wanted) { | |
| 2505 tvd->vdev_reopen_wanted = 0; | |
| 2506 vdev_reopen(tvd); | |
| 2507 } | |
| 2508 } | |
| 789 | 2509 |
| 1544 | 2510 spa_config_exit(spa, FTAG); |
| 2511 } | |
| 2512 | |
| 2513 static void | |
| 2514 spa_async_thread(spa_t *spa) | |
| 2515 { | |
| 2516 int tasks; | |
| 2517 | |
| 2518 ASSERT(spa->spa_sync_on); | |
| 789 | 2519 |
| 1544 | 2520 mutex_enter(&spa->spa_async_lock); |
| 2521 tasks = spa->spa_async_tasks; | |
| 2522 spa->spa_async_tasks = 0; | |
| 2523 mutex_exit(&spa->spa_async_lock); | |
| 2524 | |
| 2525 /* | |
|
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2526 * See if the config needs to be updated. |
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2527 */ |
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2528 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { |
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2529 mutex_enter(&spa_namespace_lock); |
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2530 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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2531 mutex_exit(&spa_namespace_lock); |
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2532 } |
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2533 |
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2534 /* |
| 1544 | 2535 * See if any devices need to be reopened. |
| 2536 */ | |
| 2537 if (tasks & SPA_ASYNC_REOPEN) | |
| 2538 spa_async_reopen(spa); | |
| 2539 | |
| 2540 /* | |
| 2541 * If any devices are done replacing, detach them. | |
| 2542 */ | |
| 2543 if (tasks & SPA_ASYNC_REPLACE_DONE) | |
| 789 | 2544 spa_vdev_replace_done(spa); |
| 2545 | |
| 1544 | 2546 /* |
| 2547 * Kick off a scrub. | |
| 2548 */ | |
| 2549 if (tasks & SPA_ASYNC_SCRUB) | |
| 2550 VERIFY(spa_scrub(spa, POOL_SCRUB_EVERYTHING, B_TRUE) == 0); | |
| 2551 | |
| 2552 /* | |
| 2553 * Kick off a resilver. | |
| 2554 */ | |
| 2555 if (tasks & SPA_ASYNC_RESILVER) | |
| 2556 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 2557 | |
| 2558 /* | |
| 2559 * Let the world know that we're done. | |
| 2560 */ | |
| 2561 mutex_enter(&spa->spa_async_lock); | |
| 2562 spa->spa_async_thread = NULL; | |
| 2563 cv_broadcast(&spa->spa_async_cv); | |
| 2564 mutex_exit(&spa->spa_async_lock); | |
| 2565 thread_exit(); | |
| 2566 } | |
| 2567 | |
| 2568 void | |
| 2569 spa_async_suspend(spa_t *spa) | |
| 2570 { | |
| 2571 mutex_enter(&spa->spa_async_lock); | |
| 2572 spa->spa_async_suspended++; | |
| 2573 while (spa->spa_async_thread != NULL) | |
| 2574 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); | |
| 2575 mutex_exit(&spa->spa_async_lock); | |
| 2576 } | |
| 2577 | |
| 2578 void | |
| 2579 spa_async_resume(spa_t *spa) | |
| 2580 { | |
| 2581 mutex_enter(&spa->spa_async_lock); | |
| 2582 ASSERT(spa->spa_async_suspended != 0); | |
| 2583 spa->spa_async_suspended--; | |
| 2584 mutex_exit(&spa->spa_async_lock); | |
| 2585 } | |
| 2586 | |
| 2587 static void | |
| 2588 spa_async_dispatch(spa_t *spa) | |
| 2589 { | |
| 2590 mutex_enter(&spa->spa_async_lock); | |
| 2591 if (spa->spa_async_tasks && !spa->spa_async_suspended && | |
|
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2592 spa->spa_async_thread == NULL && |
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2593 rootdir != NULL && !vn_is_readonly(rootdir)) |
| 1544 | 2594 spa->spa_async_thread = thread_create(NULL, 0, |
| 2595 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); | |
| 2596 mutex_exit(&spa->spa_async_lock); | |
| 2597 } | |
| 2598 | |
| 2599 void | |
| 2600 spa_async_request(spa_t *spa, int task) | |
| 2601 { | |
| 2602 mutex_enter(&spa->spa_async_lock); | |
| 2603 spa->spa_async_tasks |= task; | |
| 2604 mutex_exit(&spa->spa_async_lock); | |
| 789 | 2605 } |
| 2606 | |
| 2607 /* | |
| 2608 * ========================================================================== | |
| 2609 * SPA syncing routines | |
| 2610 * ========================================================================== | |
| 2611 */ | |
| 2612 | |
| 2613 static void | |
| 2614 spa_sync_deferred_frees(spa_t *spa, uint64_t txg) | |
| 2615 { | |
| 2616 bplist_t *bpl = &spa->spa_sync_bplist; | |
| 2617 dmu_tx_t *tx; | |
| 2618 blkptr_t blk; | |
| 2619 uint64_t itor = 0; | |
| 2620 zio_t *zio; | |
| 2621 int error; | |
| 2622 uint8_t c = 1; | |
| 2623 | |
| 2624 zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CONFIG_HELD); | |
| 2625 | |
| 2626 while (bplist_iterate(bpl, &itor, &blk) == 0) | |
| 2627 zio_nowait(zio_free(zio, spa, txg, &blk, NULL, NULL)); | |
| 2628 | |
| 2629 error = zio_wait(zio); | |
| 2630 ASSERT3U(error, ==, 0); | |
| 2631 | |
| 2632 tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
| 2633 bplist_vacate(bpl, tx); | |
| 2634 | |
| 2635 /* | |
| 2636 * Pre-dirty the first block so we sync to convergence faster. | |
| 2637 * (Usually only the first block is needed.) | |
| 2638 */ | |
| 2639 dmu_write(spa->spa_meta_objset, spa->spa_sync_bplist_obj, 0, 1, &c, tx); | |
| 2640 dmu_tx_commit(tx); | |
| 2641 } | |
| 2642 | |
| 2643 static void | |
| 2082 | 2644 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) |
| 2645 { | |
| 2646 char *packed = NULL; | |
| 2647 size_t nvsize = 0; | |
| 2648 dmu_buf_t *db; | |
| 2649 | |
| 2650 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); | |
| 2651 | |
| 2652 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 2653 | |
| 2654 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, | |
| 2655 KM_SLEEP) == 0); | |
| 2656 | |
| 2657 dmu_write(spa->spa_meta_objset, obj, 0, nvsize, packed, tx); | |
| 2658 | |
| 2659 kmem_free(packed, nvsize); | |
| 2660 | |
| 2661 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 2662 dmu_buf_will_dirty(db, tx); | |
| 2663 *(uint64_t *)db->db_data = nvsize; | |
| 2664 dmu_buf_rele(db, FTAG); | |
| 2665 } | |
| 2666 | |
| 2667 static void | |
| 2668 spa_sync_spares(spa_t *spa, dmu_tx_t *tx) | |
| 2669 { | |
| 2670 nvlist_t *nvroot; | |
| 2671 nvlist_t **spares; | |
| 2672 int i; | |
| 2673 | |
| 2674 if (!spa->spa_sync_spares) | |
| 2675 return; | |
| 2676 | |
| 2677 /* | |
| 2678 * Update the MOS nvlist describing the list of available spares. | |
| 2679 * spa_validate_spares() will have already made sure this nvlist is | |
| 2680 * valid and the vdevs are labelled appropriately. | |
| 2681 */ | |
| 2682 if (spa->spa_spares_object == 0) { | |
| 2683 spa->spa_spares_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 2684 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 2685 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 2686 VERIFY(zap_update(spa->spa_meta_objset, | |
| 2687 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SPARES, | |
| 2688 sizeof (uint64_t), 1, &spa->spa_spares_object, tx) == 0); | |
| 2689 } | |
| 2690 | |
| 2691 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 2692 if (spa->spa_nspares == 0) { | |
| 2693 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2694 NULL, 0) == 0); | |
| 2695 } else { | |
| 2696 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), | |
| 2697 KM_SLEEP); | |
| 2698 for (i = 0; i < spa->spa_nspares; i++) | |
| 2699 spares[i] = vdev_config_generate(spa, | |
| 2700 spa->spa_spares[i], B_FALSE, B_TRUE); | |
| 2701 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2702 spares, spa->spa_nspares) == 0); | |
| 2703 for (i = 0; i < spa->spa_nspares; i++) | |
| 2704 nvlist_free(spares[i]); | |
| 2705 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 2706 } | |
| 2707 | |
| 2708 spa_sync_nvlist(spa, spa->spa_spares_object, nvroot, tx); | |
| 2709 | |
| 2710 spa->spa_sync_spares = B_FALSE; | |
| 2711 } | |
| 2712 | |
| 2713 static void | |
| 789 | 2714 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) |
| 2715 { | |
| 2716 nvlist_t *config; | |
| 2717 | |
| 2718 if (list_is_empty(&spa->spa_dirty_list)) | |
| 2719 return; | |
| 2720 | |
| 2721 config = spa_config_generate(spa, NULL, dmu_tx_get_txg(tx), B_FALSE); | |
| 2722 | |
|
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2723 if (spa->spa_config_syncing) |
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2724 nvlist_free(spa->spa_config_syncing); |
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2725 spa->spa_config_syncing = config; |
| 789 | 2726 |
| 2082 | 2727 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); |
| 789 | 2728 } |
| 2729 | |
| 2730 /* | |
| 2731 * Sync the specified transaction group. New blocks may be dirtied as | |
| 2732 * part of the process, so we iterate until it converges. | |
| 2733 */ | |
| 2734 void | |
| 2735 spa_sync(spa_t *spa, uint64_t txg) | |
| 2736 { | |
| 2737 dsl_pool_t *dp = spa->spa_dsl_pool; | |
| 2738 objset_t *mos = spa->spa_meta_objset; | |
| 2739 bplist_t *bpl = &spa->spa_sync_bplist; | |
|
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2740 vdev_t *rvd = spa->spa_root_vdev; |
| 789 | 2741 vdev_t *vd; |
| 2742 dmu_tx_t *tx; | |
| 2743 int dirty_vdevs; | |
| 2744 | |
| 2745 /* | |
| 2746 * Lock out configuration changes. | |
| 2747 */ | |
| 1544 | 2748 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2749 |
| 2750 spa->spa_syncing_txg = txg; | |
| 2751 spa->spa_sync_pass = 0; | |
| 2752 | |
| 1544 | 2753 VERIFY(0 == bplist_open(bpl, mos, spa->spa_sync_bplist_obj)); |
| 789 | 2754 |
| 2082 | 2755 tx = dmu_tx_create_assigned(dp, txg); |
| 2756 | |
| 2757 /* | |
| 2758 * If we are upgrading to ZFS_VERSION_RAIDZ_DEFLATE this txg, | |
| 2759 * set spa_deflate if we have no raid-z vdevs. | |
| 2760 */ | |
| 2761 if (spa->spa_ubsync.ub_version < ZFS_VERSION_RAIDZ_DEFLATE && | |
| 2762 spa->spa_uberblock.ub_version >= ZFS_VERSION_RAIDZ_DEFLATE) { | |
| 2763 int i; | |
| 2764 | |
| 2765 for (i = 0; i < rvd->vdev_children; i++) { | |
| 2766 vd = rvd->vdev_child[i]; | |
| 2767 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) | |
| 2768 break; | |
| 2769 } | |
| 2770 if (i == rvd->vdev_children) { | |
| 2771 spa->spa_deflate = TRUE; | |
| 2772 VERIFY(0 == zap_add(spa->spa_meta_objset, | |
| 2773 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 2774 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); | |
| 2775 } | |
| 2776 } | |
| 2777 | |
| 789 | 2778 /* |
| 2779 * If anything has changed in this txg, push the deferred frees | |
| 2780 * from the previous txg. If not, leave them alone so that we | |
| 2781 * don't generate work on an otherwise idle system. | |
| 2782 */ | |
| 2783 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || | |
|
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2784 !txg_list_empty(&dp->dp_dirty_dirs, txg) || |
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2785 !txg_list_empty(&dp->dp_sync_tasks, txg)) |
| 789 | 2786 spa_sync_deferred_frees(spa, txg); |
| 2787 | |
| 2788 /* | |
| 2789 * Iterate to convergence. | |
| 2790 */ | |
| 2791 do { | |
| 2792 spa->spa_sync_pass++; | |
| 2793 | |
| 2794 spa_sync_config_object(spa, tx); | |
| 2082 | 2795 spa_sync_spares(spa, tx); |
| 1544 | 2796 spa_errlog_sync(spa, txg); |
| 789 | 2797 dsl_pool_sync(dp, txg); |
| 2798 | |
| 2799 dirty_vdevs = 0; | |
| 2800 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) { | |
| 2801 vdev_sync(vd, txg); | |
| 2802 dirty_vdevs++; | |
| 2803 } | |
| 2804 | |
| 2805 bplist_sync(bpl, tx); | |
| 2806 } while (dirty_vdevs); | |
| 2807 | |
| 2808 bplist_close(bpl); | |
| 2809 | |
| 2810 dprintf("txg %llu passes %d\n", txg, spa->spa_sync_pass); | |
| 2811 | |
| 2812 /* | |
| 2813 * Rewrite the vdev configuration (which includes the uberblock) | |
| 2814 * to commit the transaction group. | |
|
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2815 * |
|
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2816 * If there are any dirty vdevs, sync the uberblock to all vdevs. |
|
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2817 * Otherwise, pick a random top-level vdev that's known to be |
|
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2818 * visible in the config cache (see spa_vdev_add() for details). |
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2819 * If the write fails, try the next vdev until we're tried them all. |
| 789 | 2820 */ |
|
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2821 if (!list_is_empty(&spa->spa_dirty_list)) { |
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2822 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2823 } else { |
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2824 int children = rvd->vdev_children; |
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2825 int c0 = spa_get_random(children); |
|
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2826 int c; |
|
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2827 |
|
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2828 for (c = 0; c < children; c++) { |
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2829 vd = rvd->vdev_child[(c0 + c) % children]; |
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2830 if (vd->vdev_ms_array == 0) |
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2831 continue; |
|
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2832 if (vdev_config_sync(vd, txg) == 0) |
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2833 break; |
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2834 } |
|
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2835 if (c == children) |
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2836 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2837 } |
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2838 |
| 2082 | 2839 dmu_tx_commit(tx); |
| 2840 | |
|
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2841 /* |
|
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2842 * Clear the dirty config list. |
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2843 */ |
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2844 while ((vd = list_head(&spa->spa_dirty_list)) != NULL) |
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2845 vdev_config_clean(vd); |
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2846 |
|
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2847 /* |
|
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2848 * Now that the new config has synced transactionally, |
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2849 * let it become visible to the config cache. |
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2850 */ |
|
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2851 if (spa->spa_config_syncing != NULL) { |
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2852 spa_config_set(spa, spa->spa_config_syncing); |
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2853 spa->spa_config_txg = txg; |
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2854 spa->spa_config_syncing = NULL; |
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2855 } |
| 789 | 2856 |
| 2857 /* | |
| 2858 * Make a stable copy of the fully synced uberblock. | |
| 2859 * We use this as the root for pool traversals. | |
| 2860 */ | |
| 2861 spa->spa_traverse_wanted = 1; /* tells traverse_more() to stop */ | |
| 2862 | |
| 2863 spa_scrub_suspend(spa); /* stop scrubbing and finish I/Os */ | |
| 2864 | |
| 2865 rw_enter(&spa->spa_traverse_lock, RW_WRITER); | |
| 2866 spa->spa_traverse_wanted = 0; | |
| 2867 spa->spa_ubsync = spa->spa_uberblock; | |
| 2868 rw_exit(&spa->spa_traverse_lock); | |
| 2869 | |
| 2870 spa_scrub_resume(spa); /* resume scrub with new ubsync */ | |
| 2871 | |
| 2872 /* | |
| 2873 * Clean up the ZIL records for the synced txg. | |
| 2874 */ | |
| 2875 dsl_pool_zil_clean(dp); | |
| 2876 | |
| 2877 /* | |
| 2878 * Update usable space statistics. | |
| 2879 */ | |
| 2880 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) | |
| 2881 vdev_sync_done(vd, txg); | |
| 2882 | |
| 2883 /* | |
| 2884 * It had better be the case that we didn't dirty anything | |
| 2082 | 2885 * since vdev_config_sync(). |
| 789 | 2886 */ |
| 2887 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); | |
| 2888 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); | |
| 2889 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); | |
| 2890 ASSERT(bpl->bpl_queue == NULL); | |
| 2891 | |
| 1544 | 2892 spa_config_exit(spa, FTAG); |
| 2893 | |
| 2894 /* | |
| 2895 * If any async tasks have been requested, kick them off. | |
| 2896 */ | |
| 2897 spa_async_dispatch(spa); | |
| 789 | 2898 } |
| 2899 | |
| 2900 /* | |
| 2901 * Sync all pools. We don't want to hold the namespace lock across these | |
| 2902 * operations, so we take a reference on the spa_t and drop the lock during the | |
| 2903 * sync. | |
| 2904 */ | |
| 2905 void | |
| 2906 spa_sync_allpools(void) | |
| 2907 { | |
| 2908 spa_t *spa = NULL; | |
| 2909 mutex_enter(&spa_namespace_lock); | |
| 2910 while ((spa = spa_next(spa)) != NULL) { | |
| 2911 if (spa_state(spa) != POOL_STATE_ACTIVE) | |
| 2912 continue; | |
| 2913 spa_open_ref(spa, FTAG); | |
| 2914 mutex_exit(&spa_namespace_lock); | |
| 2915 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 2916 mutex_enter(&spa_namespace_lock); | |
| 2917 spa_close(spa, FTAG); | |
| 2918 } | |
| 2919 mutex_exit(&spa_namespace_lock); | |
| 2920 } | |
| 2921 | |
| 2922 /* | |
| 2923 * ========================================================================== | |
| 2924 * Miscellaneous routines | |
| 2925 * ========================================================================== | |
| 2926 */ | |
| 2927 | |
| 2928 /* | |
| 2929 * Remove all pools in the system. | |
| 2930 */ | |
| 2931 void | |
| 2932 spa_evict_all(void) | |
| 2933 { | |
| 2934 spa_t *spa; | |
| 2935 | |
| 2936 /* | |
| 2937 * Remove all cached state. All pools should be closed now, | |
| 2938 * so every spa in the AVL tree should be unreferenced. | |
| 2939 */ | |
| 2940 mutex_enter(&spa_namespace_lock); | |
| 2941 while ((spa = spa_next(NULL)) != NULL) { | |
| 2942 /* | |
| 1544 | 2943 * Stop async tasks. The async thread may need to detach |
| 2944 * a device that's been replaced, which requires grabbing | |
| 2945 * spa_namespace_lock, so we must drop it here. | |
| 789 | 2946 */ |
| 2947 spa_open_ref(spa, FTAG); | |
| 2948 mutex_exit(&spa_namespace_lock); | |
| 1544 | 2949 spa_async_suspend(spa); |
| 789 | 2950 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); |
| 2951 mutex_enter(&spa_namespace_lock); | |
| 2952 spa_close(spa, FTAG); | |
| 2953 | |
| 2954 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 2955 spa_unload(spa); | |
| 2956 spa_deactivate(spa); | |
| 2957 } | |
| 2958 spa_remove(spa); | |
| 2959 } | |
| 2960 mutex_exit(&spa_namespace_lock); | |
| 2961 } | |
| 1544 | 2962 |
| 2963 vdev_t * | |
| 2964 spa_lookup_by_guid(spa_t *spa, uint64_t guid) | |
| 2965 { | |
| 2966 return (vdev_lookup_by_guid(spa->spa_root_vdev, guid)); | |
| 2967 } | |
| 1760 | 2968 |
| 2969 void | |
| 2970 spa_upgrade(spa_t *spa) | |
| 2971 { | |
| 2972 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2973 | |
| 2974 /* | |
| 2975 * This should only be called for a non-faulted pool, and since a | |
| 2976 * future version would result in an unopenable pool, this shouldn't be | |
| 2977 * possible. | |
| 2978 */ | |
| 2979 ASSERT(spa->spa_uberblock.ub_version <= ZFS_VERSION); | |
| 2980 | |
| 2981 spa->spa_uberblock.ub_version = ZFS_VERSION; | |
| 2982 vdev_config_dirty(spa->spa_root_vdev); | |
| 2983 | |
| 2984 spa_config_exit(spa, FTAG); | |
| 2082 | 2985 |
| 2986 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 1760 | 2987 } |
| 2082 | 2988 |
| 2989 boolean_t | |
| 2990 spa_has_spare(spa_t *spa, uint64_t guid) | |
| 2991 { | |
| 2992 int i; | |
| 2993 | |
| 2994 for (i = 0; i < spa->spa_nspares; i++) | |
| 2995 if (spa->spa_spares[i]->vdev_guid == guid) | |
| 2996 return (B_TRUE); | |
| 2997 | |
| 2998 return (B_FALSE); | |
| 2999 } |