Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/spa.c @ 2174:73de7a781492
6433717 offline devices should not be marked persistently unavailble
6436524 importing a bogus pool config can panic system
6436800 ztest failure: spa_vdev_attach() returns EBUSY instead of ENOTSUP
| author | eschrock |
|---|---|
| date | Mon, 12 Jun 2006 08:20:57 -0700 |
| parents | 76b439ec3ac1 |
| children | 712a788c2dfd |
| 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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diff
changeset
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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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changeset
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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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1544
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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628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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parents:
1807
diff
changeset
|
444 * Validate the labels for all leaf vdevs. We need to grab the config |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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parents:
1807
diff
changeset
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445 * lock because all label I/O is done with the ZIO_FLAG_CONFIG_HELD |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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parents:
1807
diff
changeset
|
446 * flag. |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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parents:
1807
diff
changeset
|
447 */ |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
parents:
1807
diff
changeset
|
448 spa_config_enter(spa, RW_READER, FTAG); |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
parents:
1807
diff
changeset
|
449 error = vdev_validate(rvd); |
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628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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1807
diff
changeset
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450 spa_config_exit(spa, FTAG); |
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628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
parents:
1807
diff
changeset
|
451 |
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628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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parents:
1807
diff
changeset
|
452 if (error != 0) { |
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628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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1807
diff
changeset
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453 error = EBADF; |
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628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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1807
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454 goto out; |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
parents:
1807
diff
changeset
|
455 } |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
parents:
1807
diff
changeset
|
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)); |
| 650 dmu_objset_find(spa->spa_name, zil_claim, tx, 0); | |
| 651 dmu_tx_commit(tx); | |
| 652 | |
| 653 spa->spa_sync_on = B_TRUE; | |
| 654 txg_sync_start(spa->spa_dsl_pool); | |
| 655 | |
| 656 /* | |
| 657 * Wait for all claims to sync. | |
| 658 */ | |
| 659 txg_wait_synced(spa->spa_dsl_pool, 0); | |
|
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660 |
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661 /* |
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662 * If the config cache is stale, or we have uninitialized |
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663 * metaslabs (see spa_vdev_add()), then update the config. |
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664 */ |
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665 if (config_cache_txg != spa->spa_config_txg || |
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666 state == SPA_LOAD_IMPORT) |
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667 need_update = B_TRUE; |
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668 |
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669 for (c = 0; c < rvd->vdev_children; c++) |
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670 if (rvd->vdev_child[c]->vdev_ms_array == 0) |
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671 need_update = B_TRUE; |
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672 |
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673 /* |
|
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674 * Update the config cache asychronously in case we're the |
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675 * root pool, in which case the config cache isn't writable yet. |
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676 */ |
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677 if (need_update) |
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678 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); |
| 789 | 679 } |
| 680 | |
| 1544 | 681 error = 0; |
| 682 out: | |
| 2082 | 683 if (error && error != EBADF) |
| 1544 | 684 zfs_ereport_post(FM_EREPORT_ZFS_POOL, spa, NULL, NULL, 0, 0); |
| 685 spa->spa_load_state = SPA_LOAD_NONE; | |
| 686 spa->spa_ena = 0; | |
| 687 | |
| 688 return (error); | |
| 789 | 689 } |
| 690 | |
| 691 /* | |
| 692 * Pool Open/Import | |
| 693 * | |
| 694 * The import case is identical to an open except that the configuration is sent | |
| 695 * down from userland, instead of grabbed from the configuration cache. For the | |
| 696 * case of an open, the pool configuration will exist in the | |
| 697 * POOL_STATE_UNITIALIZED state. | |
| 698 * | |
| 699 * The stats information (gen/count/ustats) is used to gather vdev statistics at | |
| 700 * the same time open the pool, without having to keep around the spa_t in some | |
| 701 * ambiguous state. | |
| 702 */ | |
| 703 static int | |
| 704 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) | |
| 705 { | |
| 706 spa_t *spa; | |
| 707 int error; | |
| 708 int loaded = B_FALSE; | |
| 709 int locked = B_FALSE; | |
| 710 | |
| 711 *spapp = NULL; | |
| 712 | |
| 713 /* | |
| 714 * As disgusting as this is, we need to support recursive calls to this | |
| 715 * function because dsl_dir_open() is called during spa_load(), and ends | |
| 716 * up calling spa_open() again. The real fix is to figure out how to | |
| 717 * avoid dsl_dir_open() calling this in the first place. | |
| 718 */ | |
| 719 if (mutex_owner(&spa_namespace_lock) != curthread) { | |
| 720 mutex_enter(&spa_namespace_lock); | |
| 721 locked = B_TRUE; | |
| 722 } | |
| 723 | |
| 724 if ((spa = spa_lookup(pool)) == NULL) { | |
| 725 if (locked) | |
| 726 mutex_exit(&spa_namespace_lock); | |
| 727 return (ENOENT); | |
| 728 } | |
| 729 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { | |
| 730 | |
| 731 spa_activate(spa); | |
| 732 | |
|
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733 error = spa_load(spa, spa->spa_config, SPA_LOAD_OPEN, B_FALSE); |
| 789 | 734 |
| 735 if (error == EBADF) { | |
| 736 /* | |
|
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737 * If vdev_validate() returns failure (indicated by |
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738 * EBADF), it indicates that one of the vdevs indicates |
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739 * that the pool has been exported or destroyed. If |
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740 * this is the case, the config cache is out of sync and |
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741 * we should remove the pool from the namespace. |
| 789 | 742 */ |
| 2082 | 743 zfs_post_ok(spa, NULL); |
| 789 | 744 spa_unload(spa); |
| 745 spa_deactivate(spa); | |
| 746 spa_remove(spa); | |
| 747 spa_config_sync(); | |
| 748 if (locked) | |
| 749 mutex_exit(&spa_namespace_lock); | |
| 750 return (ENOENT); | |
| 1544 | 751 } |
| 752 | |
| 753 if (error) { | |
| 789 | 754 /* |
| 755 * We can't open the pool, but we still have useful | |
| 756 * information: the state of each vdev after the | |
| 757 * attempted vdev_open(). Return this to the user. | |
| 758 */ | |
|
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759 if (config != NULL && spa->spa_root_vdev != NULL) { |
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760 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 761 *config = spa_config_generate(spa, NULL, -1ULL, |
| 762 B_TRUE); | |
|
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763 spa_config_exit(spa, FTAG); |
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764 } |
| 789 | 765 spa_unload(spa); |
| 766 spa_deactivate(spa); | |
| 1544 | 767 spa->spa_last_open_failed = B_TRUE; |
| 789 | 768 if (locked) |
| 769 mutex_exit(&spa_namespace_lock); | |
| 770 *spapp = NULL; | |
| 771 return (error); | |
| 1544 | 772 } else { |
| 773 zfs_post_ok(spa, NULL); | |
| 774 spa->spa_last_open_failed = B_FALSE; | |
| 789 | 775 } |
| 776 | |
| 777 loaded = B_TRUE; | |
| 778 } | |
| 779 | |
| 780 spa_open_ref(spa, tag); | |
| 781 if (locked) | |
| 782 mutex_exit(&spa_namespace_lock); | |
| 783 | |
| 784 *spapp = spa; | |
| 785 | |
| 786 if (config != NULL) { | |
| 1544 | 787 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 788 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
| 1544 | 789 spa_config_exit(spa, FTAG); |
| 789 | 790 } |
| 791 | |
| 792 /* | |
| 793 * If we just loaded the pool, resilver anything that's out of date. | |
| 794 */ | |
| 795 if (loaded && (spa_mode & FWRITE)) | |
| 796 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 797 | |
| 798 return (0); | |
| 799 } | |
| 800 | |
| 801 int | |
| 802 spa_open(const char *name, spa_t **spapp, void *tag) | |
| 803 { | |
| 804 return (spa_open_common(name, spapp, tag, NULL)); | |
| 805 } | |
| 806 | |
| 1544 | 807 /* |
| 808 * Lookup the given spa_t, incrementing the inject count in the process, | |
| 809 * preventing it from being exported or destroyed. | |
| 810 */ | |
| 811 spa_t * | |
| 812 spa_inject_addref(char *name) | |
| 813 { | |
| 814 spa_t *spa; | |
| 815 | |
| 816 mutex_enter(&spa_namespace_lock); | |
| 817 if ((spa = spa_lookup(name)) == NULL) { | |
| 818 mutex_exit(&spa_namespace_lock); | |
| 819 return (NULL); | |
| 820 } | |
| 821 spa->spa_inject_ref++; | |
| 822 mutex_exit(&spa_namespace_lock); | |
| 823 | |
| 824 return (spa); | |
| 825 } | |
| 826 | |
| 827 void | |
| 828 spa_inject_delref(spa_t *spa) | |
| 829 { | |
| 830 mutex_enter(&spa_namespace_lock); | |
| 831 spa->spa_inject_ref--; | |
| 832 mutex_exit(&spa_namespace_lock); | |
| 833 } | |
| 834 | |
| 2082 | 835 static void |
| 836 spa_add_spares(spa_t *spa, nvlist_t *config) | |
| 837 { | |
| 838 nvlist_t **spares; | |
| 839 uint_t i, nspares; | |
| 840 nvlist_t *nvroot; | |
| 841 uint64_t guid; | |
| 842 vdev_stat_t *vs; | |
| 843 uint_t vsc; | |
| 844 | |
| 845 if (spa->spa_nspares == 0) | |
| 846 return; | |
| 847 | |
| 848 VERIFY(nvlist_lookup_nvlist(config, | |
| 849 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); | |
| 850 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 851 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 852 if (nspares != 0) { | |
| 853 VERIFY(nvlist_add_nvlist_array(nvroot, | |
| 854 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 855 VERIFY(nvlist_lookup_nvlist_array(nvroot, | |
| 856 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 857 | |
| 858 /* | |
| 859 * Go through and find any spares which have since been | |
| 860 * repurposed as an active spare. If this is the case, update | |
| 861 * their status appropriately. | |
| 862 */ | |
| 863 for (i = 0; i < nspares; i++) { | |
| 864 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 865 ZPOOL_CONFIG_GUID, &guid) == 0); | |
| 866 if (spa_spare_inuse(guid)) { | |
| 867 VERIFY(nvlist_lookup_uint64_array( | |
| 868 spares[i], ZPOOL_CONFIG_STATS, | |
| 869 (uint64_t **)&vs, &vsc) == 0); | |
| 870 vs->vs_state = VDEV_STATE_CANT_OPEN; | |
| 871 vs->vs_aux = VDEV_AUX_SPARED; | |
| 872 } | |
| 873 } | |
| 874 } | |
| 875 } | |
| 876 | |
| 789 | 877 int |
| 1544 | 878 spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) |
| 789 | 879 { |
| 880 int error; | |
| 881 spa_t *spa; | |
| 882 | |
| 883 *config = NULL; | |
| 884 error = spa_open_common(name, &spa, FTAG, config); | |
| 885 | |
| 2082 | 886 if (spa && *config != NULL) { |
| 1544 | 887 VERIFY(nvlist_add_uint64(*config, ZPOOL_CONFIG_ERRCOUNT, |
| 888 spa_get_errlog_size(spa)) == 0); | |
| 889 | |
| 2082 | 890 spa_add_spares(spa, *config); |
| 891 } | |
| 892 | |
| 1544 | 893 /* |
| 894 * We want to get the alternate root even for faulted pools, so we cheat | |
| 895 * and call spa_lookup() directly. | |
| 896 */ | |
| 897 if (altroot) { | |
| 898 if (spa == NULL) { | |
| 899 mutex_enter(&spa_namespace_lock); | |
| 900 spa = spa_lookup(name); | |
| 901 if (spa) | |
| 902 spa_altroot(spa, altroot, buflen); | |
| 903 else | |
| 904 altroot[0] = '\0'; | |
| 905 spa = NULL; | |
| 906 mutex_exit(&spa_namespace_lock); | |
| 907 } else { | |
| 908 spa_altroot(spa, altroot, buflen); | |
| 909 } | |
| 910 } | |
| 911 | |
| 789 | 912 if (spa != NULL) |
| 913 spa_close(spa, FTAG); | |
| 914 | |
| 915 return (error); | |
| 916 } | |
| 917 | |
| 918 /* | |
| 2082 | 919 * Validate that the 'spares' array is well formed. We must have an array of |
| 920 * nvlists, each which describes a valid leaf vdev. | |
| 921 */ | |
| 922 static int | |
| 923 spa_validate_spares(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) | |
| 924 { | |
| 925 nvlist_t **spares; | |
| 926 uint_t i, nspares; | |
| 927 vdev_t *vd; | |
| 928 int error; | |
| 929 | |
| 930 /* | |
| 931 * It's acceptable to have no spares specified. | |
| 932 */ | |
| 933 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 934 &spares, &nspares) != 0) | |
| 935 return (0); | |
| 936 | |
| 937 if (nspares == 0) | |
| 938 return (EINVAL); | |
| 939 | |
| 940 /* | |
| 941 * Make sure the pool is formatted with a version that supports hot | |
| 942 * spares. | |
| 943 */ | |
| 944 if (spa_version(spa) < ZFS_VERSION_SPARES) | |
| 945 return (ENOTSUP); | |
| 946 | |
| 947 for (i = 0; i < nspares; i++) { | |
| 948 if ((error = spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 949 mode)) != 0) | |
| 950 return (error); | |
| 951 | |
| 952 if (!vd->vdev_ops->vdev_op_leaf) { | |
| 953 vdev_free(vd); | |
| 954 return (EINVAL); | |
| 955 } | |
| 956 | |
| 957 if ((error = vdev_open(vd)) != 0) { | |
| 958 vdev_free(vd); | |
| 959 return (error); | |
| 960 } | |
| 961 | |
| 962 vd->vdev_top = vd; | |
| 963 if ((error = vdev_label_spare(vd, crtxg)) != 0) { | |
| 964 vdev_free(vd); | |
| 965 return (error); | |
| 966 } | |
| 967 | |
| 968 VERIFY(nvlist_add_uint64(spares[i], ZPOOL_CONFIG_GUID, | |
| 969 vd->vdev_guid) == 0); | |
| 970 | |
| 971 vdev_free(vd); | |
| 972 } | |
| 973 | |
| 974 return (0); | |
| 975 } | |
| 976 | |
| 977 /* | |
| 789 | 978 * Pool Creation |
| 979 */ | |
| 980 int | |
|
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981 spa_create(const char *pool, nvlist_t *nvroot, const char *altroot) |
| 789 | 982 { |
| 983 spa_t *spa; | |
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984 vdev_t *rvd; |
| 789 | 985 dsl_pool_t *dp; |
| 986 dmu_tx_t *tx; | |
| 2082 | 987 int c, error = 0; |
| 789 | 988 uint64_t txg = TXG_INITIAL; |
| 2082 | 989 nvlist_t **spares; |
| 990 uint_t nspares; | |
| 789 | 991 |
| 992 /* | |
| 993 * If this pool already exists, return failure. | |
| 994 */ | |
| 995 mutex_enter(&spa_namespace_lock); | |
| 996 if (spa_lookup(pool) != NULL) { | |
| 997 mutex_exit(&spa_namespace_lock); | |
| 998 return (EEXIST); | |
| 999 } | |
| 1000 | |
| 1001 /* | |
| 1002 * Allocate a new spa_t structure. | |
| 1003 */ | |
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1004 spa = spa_add(pool, altroot); |
| 789 | 1005 spa_activate(spa); |
| 1006 | |
| 1007 spa->spa_uberblock.ub_txg = txg - 1; | |
| 1760 | 1008 spa->spa_uberblock.ub_version = ZFS_VERSION; |
| 789 | 1009 spa->spa_ubsync = spa->spa_uberblock; |
| 1010 | |
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1011 /* |
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1012 * Create the root vdev. |
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1013 */ |
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1014 spa_config_enter(spa, RW_WRITER, FTAG); |
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1015 |
| 2082 | 1016 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); |
| 1017 | |
| 1018 ASSERT(error != 0 || rvd != NULL); | |
| 1019 ASSERT(error != 0 || spa->spa_root_vdev == rvd); | |
| 1020 | |
| 1021 if (error == 0 && rvd->vdev_children == 0) | |
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1022 error = EINVAL; |
| 2082 | 1023 |
| 1024 if (error == 0 && | |
| 1025 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && | |
| 1026 (error = spa_validate_spares(spa, nvroot, txg, | |
| 1027 VDEV_ALLOC_ADD)) == 0) { | |
| 1028 for (c = 0; c < rvd->vdev_children; c++) | |
| 1029 vdev_init(rvd->vdev_child[c], txg); | |
| 1030 vdev_config_dirty(rvd); | |
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1031 } |
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1032 |
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1033 spa_config_exit(spa, FTAG); |
| 789 | 1034 |
| 2082 | 1035 if (error != 0) { |
| 789 | 1036 spa_unload(spa); |
| 1037 spa_deactivate(spa); | |
| 1038 spa_remove(spa); | |
| 1039 mutex_exit(&spa_namespace_lock); | |
| 1040 return (error); | |
| 1041 } | |
| 1042 | |
| 2082 | 1043 /* |
| 1044 * Get the list of spares, if specified. | |
| 1045 */ | |
| 1046 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1047 &spares, &nspares) == 0) { | |
| 1048 VERIFY(nvlist_alloc(&spa->spa_sparelist, NV_UNIQUE_NAME, | |
| 1049 KM_SLEEP) == 0); | |
| 1050 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1051 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1052 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1053 spa_load_spares(spa); | |
| 1054 spa_config_exit(spa, FTAG); | |
| 1055 spa->spa_sync_spares = B_TRUE; | |
| 1056 } | |
| 1057 | |
| 789 | 1058 spa->spa_dsl_pool = dp = dsl_pool_create(spa, txg); |
| 1059 spa->spa_meta_objset = dp->dp_meta_objset; | |
| 1060 | |
| 1061 tx = dmu_tx_create_assigned(dp, txg); | |
| 1062 | |
| 1063 /* | |
| 1064 * Create the pool config object. | |
| 1065 */ | |
| 1066 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 1067 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 1068 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 1069 | |
| 1544 | 1070 if (zap_add(spa->spa_meta_objset, |
| 789 | 1071 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 1072 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { |
| 1073 cmn_err(CE_PANIC, "failed to add pool config"); | |
| 1074 } | |
| 789 | 1075 |
| 2082 | 1076 /* Newly created pools are always deflated. */ |
| 1077 spa->spa_deflate = TRUE; | |
| 1078 if (zap_add(spa->spa_meta_objset, | |
| 1079 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 1080 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { | |
| 1081 cmn_err(CE_PANIC, "failed to add deflate"); | |
| 1082 } | |
| 1083 | |
| 789 | 1084 /* |
| 1085 * Create the deferred-free bplist object. Turn off compression | |
| 1086 * because sync-to-convergence takes longer if the blocksize | |
| 1087 * keeps changing. | |
| 1088 */ | |
| 1089 spa->spa_sync_bplist_obj = bplist_create(spa->spa_meta_objset, | |
| 1090 1 << 14, tx); | |
| 1091 dmu_object_set_compress(spa->spa_meta_objset, spa->spa_sync_bplist_obj, | |
| 1092 ZIO_COMPRESS_OFF, tx); | |
| 1093 | |
| 1544 | 1094 if (zap_add(spa->spa_meta_objset, |
| 789 | 1095 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, |
| 1544 | 1096 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj, tx) != 0) { |
| 1097 cmn_err(CE_PANIC, "failed to add bplist"); | |
| 1098 } | |
| 789 | 1099 |
| 1100 dmu_tx_commit(tx); | |
| 1101 | |
| 1102 spa->spa_sync_on = B_TRUE; | |
| 1103 txg_sync_start(spa->spa_dsl_pool); | |
| 1104 | |
| 1105 /* | |
| 1106 * We explicitly wait for the first transaction to complete so that our | |
| 1107 * bean counters are appropriately updated. | |
| 1108 */ | |
| 1109 txg_wait_synced(spa->spa_dsl_pool, txg); | |
| 1110 | |
| 1111 spa_config_sync(); | |
| 1112 | |
| 1113 mutex_exit(&spa_namespace_lock); | |
| 1114 | |
| 1115 return (0); | |
| 1116 } | |
| 1117 | |
| 1118 /* | |
| 1119 * Import the given pool into the system. We set up the necessary spa_t and | |
| 1120 * then call spa_load() to do the dirty work. | |
| 1121 */ | |
| 1122 int | |
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1123 spa_import(const char *pool, nvlist_t *config, const char *altroot) |
| 789 | 1124 { |
| 1125 spa_t *spa; | |
| 1126 int error; | |
| 2082 | 1127 nvlist_t *nvroot; |
| 1128 nvlist_t **spares; | |
| 1129 uint_t nspares; | |
| 789 | 1130 |
| 1131 if (!(spa_mode & FWRITE)) | |
| 1132 return (EROFS); | |
| 1133 | |
| 1134 /* | |
| 1135 * If a pool with this name exists, return failure. | |
| 1136 */ | |
| 1137 mutex_enter(&spa_namespace_lock); | |
| 1138 if (spa_lookup(pool) != NULL) { | |
| 1139 mutex_exit(&spa_namespace_lock); | |
| 1140 return (EEXIST); | |
| 1141 } | |
| 1142 | |
| 1143 /* | |
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1144 * Create and initialize the spa structure. |
| 789 | 1145 */ |
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1146 spa = spa_add(pool, altroot); |
| 789 | 1147 spa_activate(spa); |
| 1148 | |
| 1149 /* | |
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1150 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1151 * Pass TRUE for mosconfig because the user-supplied config |
| 1152 * is actually the one to trust when doing an import. | |
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1153 */ |
| 1732 | 1154 error = spa_load(spa, config, SPA_LOAD_IMPORT, B_TRUE); |
| 789 | 1155 |
| 2082 | 1156 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1157 /* | |
| 1158 * Toss any existing sparelist, as it doesn't have any validity anymore, | |
| 1159 * and conflicts with spa_has_spare(). | |
| 1160 */ | |
| 1161 if (spa->spa_sparelist) { | |
| 1162 nvlist_free(spa->spa_sparelist); | |
| 1163 spa->spa_sparelist = NULL; | |
| 1164 spa_load_spares(spa); | |
| 1165 } | |
| 1166 | |
| 1167 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
| 1168 &nvroot) == 0); | |
| 1169 if (error == 0) | |
| 1170 error = spa_validate_spares(spa, nvroot, -1ULL, | |
| 1171 VDEV_ALLOC_SPARE); | |
| 1172 spa_config_exit(spa, FTAG); | |
| 1173 | |
| 1174 if (error != 0) { | |
| 789 | 1175 spa_unload(spa); |
| 1176 spa_deactivate(spa); | |
| 1177 spa_remove(spa); | |
| 1178 mutex_exit(&spa_namespace_lock); | |
| 1179 return (error); | |
| 1180 } | |
| 1181 | |
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1182 /* |
| 2082 | 1183 * Override any spares as specified by the user, as these may have |
| 1184 * correct device names/devids, etc. | |
| 1185 */ | |
| 1186 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1187 &spares, &nspares) == 0) { | |
| 1188 if (spa->spa_sparelist) | |
| 1189 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1190 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1191 else | |
| 1192 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1193 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1194 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1195 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1196 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1197 spa_load_spares(spa); | |
| 1198 spa_config_exit(spa, FTAG); | |
| 1199 spa->spa_sync_spares = B_TRUE; | |
| 1200 } | |
| 1201 | |
| 1202 /* | |
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1203 * Update the config cache to include the newly-imported pool. |
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1204 */ |
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1205 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1206 |
| 789 | 1207 mutex_exit(&spa_namespace_lock); |
| 1208 | |
| 1209 /* | |
| 1210 * Resilver anything that's out of date. | |
| 1211 */ | |
| 1212 if (spa_mode & FWRITE) | |
| 1213 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1214 | |
| 1215 return (0); | |
| 1216 } | |
| 1217 | |
| 1218 /* | |
| 1219 * This (illegal) pool name is used when temporarily importing a spa_t in order | |
| 1220 * to get the vdev stats associated with the imported devices. | |
| 1221 */ | |
| 1222 #define TRYIMPORT_NAME "$import" | |
| 1223 | |
| 1224 nvlist_t * | |
| 1225 spa_tryimport(nvlist_t *tryconfig) | |
| 1226 { | |
| 1227 nvlist_t *config = NULL; | |
| 1228 char *poolname; | |
| 1229 spa_t *spa; | |
| 1230 uint64_t state; | |
| 1231 | |
| 1232 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) | |
| 1233 return (NULL); | |
| 1234 | |
| 1235 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) | |
| 1236 return (NULL); | |
| 1237 | |
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1238 /* |
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1239 * Create and initialize the spa structure. |
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1240 */ |
| 789 | 1241 mutex_enter(&spa_namespace_lock); |
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1242 spa = spa_add(TRYIMPORT_NAME, NULL); |
| 789 | 1243 spa_activate(spa); |
| 1244 | |
| 1245 /* | |
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1246 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1247 * Pass TRUE for mosconfig because the user-supplied config |
| 1248 * is actually the one to trust when doing an import. | |
| 789 | 1249 */ |
| 1732 | 1250 (void) spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE); |
| 789 | 1251 |
| 1252 /* | |
| 1253 * If 'tryconfig' was at least parsable, return the current config. | |
| 1254 */ | |
| 1255 if (spa->spa_root_vdev != NULL) { | |
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1256 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 1257 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
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1258 spa_config_exit(spa, FTAG); |
| 789 | 1259 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, |
| 1260 poolname) == 0); | |
| 1261 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
| 1262 state) == 0); | |
| 2082 | 1263 |
| 1264 /* | |
| 1265 * Add the list of hot spares. | |
| 1266 */ | |
| 1267 spa_add_spares(spa, config); | |
| 789 | 1268 } |
| 1269 | |
| 1270 spa_unload(spa); | |
| 1271 spa_deactivate(spa); | |
| 1272 spa_remove(spa); | |
| 1273 mutex_exit(&spa_namespace_lock); | |
| 1274 | |
| 1275 return (config); | |
| 1276 } | |
| 1277 | |
| 1278 /* | |
| 1279 * Pool export/destroy | |
| 1280 * | |
| 1281 * The act of destroying or exporting a pool is very simple. We make sure there | |
| 1282 * is no more pending I/O and any references to the pool are gone. Then, we | |
| 1283 * update the pool state and sync all the labels to disk, removing the | |
| 1284 * configuration from the cache afterwards. | |
| 1285 */ | |
| 1286 static int | |
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1287 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig) |
| 789 | 1288 { |
| 1289 spa_t *spa; | |
| 1290 | |
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1291 if (oldconfig) |
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1292 *oldconfig = NULL; |
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1293 |
| 789 | 1294 if (!(spa_mode & FWRITE)) |
| 1295 return (EROFS); | |
| 1296 | |
| 1297 mutex_enter(&spa_namespace_lock); | |
| 1298 if ((spa = spa_lookup(pool)) == NULL) { | |
| 1299 mutex_exit(&spa_namespace_lock); | |
| 1300 return (ENOENT); | |
| 1301 } | |
| 1302 | |
| 1303 /* | |
| 1544 | 1304 * Put a hold on the pool, drop the namespace lock, stop async tasks, |
| 1305 * reacquire the namespace lock, and see if we can export. | |
| 1306 */ | |
| 1307 spa_open_ref(spa, FTAG); | |
| 1308 mutex_exit(&spa_namespace_lock); | |
| 1309 spa_async_suspend(spa); | |
| 1310 mutex_enter(&spa_namespace_lock); | |
| 1311 spa_close(spa, FTAG); | |
| 1312 | |
| 1313 /* | |
| 789 | 1314 * The pool will be in core if it's openable, |
| 1315 * in which case we can modify its state. | |
| 1316 */ | |
| 1317 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { | |
| 1318 /* | |
| 1319 * Objsets may be open only because they're dirty, so we | |
| 1320 * have to force it to sync before checking spa_refcnt. | |
| 1321 */ | |
| 1322 spa_scrub_suspend(spa); | |
| 1323 txg_wait_synced(spa->spa_dsl_pool, 0); | |
| 1324 | |
| 1544 | 1325 /* |
| 1326 * A pool cannot be exported or destroyed if there are active | |
| 1327 * references. If we are resetting a pool, allow references by | |
| 1328 * fault injection handlers. | |
| 1329 */ | |
| 1330 if (!spa_refcount_zero(spa) || | |
| 1331 (spa->spa_inject_ref != 0 && | |
| 1332 new_state != POOL_STATE_UNINITIALIZED)) { | |
| 789 | 1333 spa_scrub_resume(spa); |
| 1544 | 1334 spa_async_resume(spa); |
| 789 | 1335 mutex_exit(&spa_namespace_lock); |
| 1336 return (EBUSY); | |
| 1337 } | |
| 1338 | |
| 1339 spa_scrub_resume(spa); | |
| 1340 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); | |
| 1341 | |
| 1342 /* | |
| 1343 * We want this to be reflected on every label, | |
| 1344 * so mark them all dirty. spa_unload() will do the | |
| 1345 * final sync that pushes these changes out. | |
| 1346 */ | |
| 1544 | 1347 if (new_state != POOL_STATE_UNINITIALIZED) { |
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1348 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1544 | 1349 spa->spa_state = new_state; |
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1350 spa->spa_final_txg = spa_last_synced_txg(spa) + 1; |
| 1544 | 1351 vdev_config_dirty(spa->spa_root_vdev); |
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1352 spa_config_exit(spa, FTAG); |
| 1544 | 1353 } |
| 789 | 1354 } |
| 1355 | |
| 1356 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 1357 spa_unload(spa); | |
| 1358 spa_deactivate(spa); | |
| 1359 } | |
| 1360 | |
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1361 if (oldconfig && spa->spa_config) |
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1362 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); |
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1363 |
| 1544 | 1364 if (new_state != POOL_STATE_UNINITIALIZED) { |
| 1365 spa_remove(spa); | |
| 1366 spa_config_sync(); | |
| 1367 } | |
| 789 | 1368 mutex_exit(&spa_namespace_lock); |
| 1369 | |
| 1370 return (0); | |
| 1371 } | |
| 1372 | |
| 1373 /* | |
| 1374 * Destroy a storage pool. | |
| 1375 */ | |
| 1376 int | |
| 1377 spa_destroy(char *pool) | |
| 1378 { | |
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1379 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL)); |
| 789 | 1380 } |
| 1381 | |
| 1382 /* | |
| 1383 * Export a storage pool. | |
| 1384 */ | |
| 1385 int | |
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1386 spa_export(char *pool, nvlist_t **oldconfig) |
| 789 | 1387 { |
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1388 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig)); |
| 789 | 1389 } |
| 1390 | |
| 1391 /* | |
| 1544 | 1392 * Similar to spa_export(), this unloads the spa_t without actually removing it |
| 1393 * from the namespace in any way. | |
| 1394 */ | |
| 1395 int | |
| 1396 spa_reset(char *pool) | |
| 1397 { | |
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1398 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL)); |
| 1544 | 1399 } |
| 1400 | |
| 1401 | |
| 1402 /* | |
| 789 | 1403 * ========================================================================== |
| 1404 * Device manipulation | |
| 1405 * ========================================================================== | |
| 1406 */ | |
| 1407 | |
| 1408 /* | |
| 1409 * Add capacity to a storage pool. | |
| 1410 */ | |
| 1411 int | |
| 1412 spa_vdev_add(spa_t *spa, nvlist_t *nvroot) | |
| 1413 { | |
| 1414 uint64_t txg; | |
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1415 int c, error; |
| 789 | 1416 vdev_t *rvd = spa->spa_root_vdev; |
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1417 vdev_t *vd, *tvd; |
| 2082 | 1418 nvlist_t **spares; |
| 1419 uint_t i, nspares; | |
| 789 | 1420 |
| 1421 txg = spa_vdev_enter(spa); | |
| 1422 | |
| 2082 | 1423 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, |
| 1424 VDEV_ALLOC_ADD)) != 0) | |
| 1425 return (spa_vdev_exit(spa, NULL, txg, error)); | |
| 1426 | |
| 1427 if ((error = spa_validate_spares(spa, nvroot, txg, | |
| 1428 VDEV_ALLOC_ADD)) != 0) | |
| 789 | 1429 return (spa_vdev_exit(spa, vd, txg, error)); |
| 1430 | |
| 2082 | 1431 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, |
| 1432 &spares, &nspares) != 0) | |
| 1433 nspares = 0; | |
| 1434 | |
| 1435 if (vd->vdev_children == 0 && nspares == 0) | |
| 1436 return (spa_vdev_exit(spa, vd, txg, EINVAL)); | |
| 1437 | |
| 1438 if (vd->vdev_children != 0) { | |
| 1439 if ((error = vdev_create(vd, txg, B_FALSE)) != 0) | |
| 1440 return (spa_vdev_exit(spa, vd, txg, error)); | |
| 1441 | |
| 1442 /* | |
| 1443 * Transfer each new top-level vdev from vd to rvd. | |
| 1444 */ | |
| 1445 for (c = 0; c < vd->vdev_children; c++) { | |
| 1446 tvd = vd->vdev_child[c]; | |
| 1447 vdev_remove_child(vd, tvd); | |
| 1448 tvd->vdev_id = rvd->vdev_children; | |
| 1449 vdev_add_child(rvd, tvd); | |
| 1450 vdev_config_dirty(tvd); | |
| 1451 } | |
| 1452 } | |
| 1453 | |
| 1454 if (nspares != 0) { | |
| 1455 if (spa->spa_sparelist != NULL) { | |
| 1456 nvlist_t **oldspares; | |
| 1457 uint_t oldnspares; | |
| 1458 nvlist_t **newspares; | |
| 1459 | |
| 1460 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 1461 ZPOOL_CONFIG_SPARES, &oldspares, &oldnspares) == 0); | |
| 1462 | |
| 1463 newspares = kmem_alloc(sizeof (void *) * | |
| 1464 (nspares + oldnspares), KM_SLEEP); | |
| 1465 for (i = 0; i < oldnspares; i++) | |
| 1466 VERIFY(nvlist_dup(oldspares[i], | |
| 1467 &newspares[i], KM_SLEEP) == 0); | |
| 1468 for (i = 0; i < nspares; i++) | |
| 1469 VERIFY(nvlist_dup(spares[i], | |
| 1470 &newspares[i + oldnspares], | |
| 1471 KM_SLEEP) == 0); | |
| 1472 | |
| 1473 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1474 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1475 | |
| 1476 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1477 ZPOOL_CONFIG_SPARES, newspares, | |
| 1478 nspares + oldnspares) == 0); | |
| 1479 for (i = 0; i < oldnspares + nspares; i++) | |
| 1480 nvlist_free(newspares[i]); | |
| 1481 kmem_free(newspares, (oldnspares + nspares) * | |
| 1482 sizeof (void *)); | |
| 1483 } else { | |
| 1484 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1485 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1486 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1487 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1488 } | |
| 1489 | |
| 1490 spa_load_spares(spa); | |
| 1491 spa->spa_sync_spares = B_TRUE; | |
| 789 | 1492 } |
| 1493 | |
| 1494 /* | |
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1495 * We have to be careful when adding new vdevs to an existing pool. |
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1496 * If other threads start allocating from these vdevs before we |
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1497 * sync the config cache, and we lose power, then upon reboot we may |
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1498 * fail to open the pool because there are DVAs that the config cache |
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1499 * can't translate. Therefore, we first add the vdevs without |
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1500 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); |
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1501 * and then let spa_config_update() initialize the new metaslabs. |
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1502 * |
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1503 * spa_load() checks for added-but-not-initialized vdevs, so that |
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1504 * if we lose power at any point in this sequence, the remaining |
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1505 * steps will be completed the next time we load the pool. |
| 789 | 1506 */ |
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1507 (void) spa_vdev_exit(spa, vd, txg, 0); |
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1508 |
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1509 mutex_enter(&spa_namespace_lock); |
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1510 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1511 mutex_exit(&spa_namespace_lock); |
| 789 | 1512 |
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1513 return (0); |
| 789 | 1514 } |
| 1515 | |
| 1516 /* | |
| 1517 * Attach a device to a mirror. The arguments are the path to any device | |
| 1518 * in the mirror, and the nvroot for the new device. If the path specifies | |
| 1519 * a device that is not mirrored, we automatically insert the mirror vdev. | |
| 1520 * | |
| 1521 * If 'replacing' is specified, the new device is intended to replace the | |
| 1522 * existing device; in this case the two devices are made into their own | |
| 1523 * mirror using the 'replacing' vdev, which is functionally idendical to | |
| 1524 * the mirror vdev (it actually reuses all the same ops) but has a few | |
| 1525 * extra rules: you can't attach to it after it's been created, and upon | |
| 1526 * completion of resilvering, the first disk (the one being replaced) | |
| 1527 * is automatically detached. | |
| 1528 */ | |
| 1529 int | |
| 1544 | 1530 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) |
| 789 | 1531 { |
| 1532 uint64_t txg, open_txg; | |
| 1533 int error; | |
| 1534 vdev_t *rvd = spa->spa_root_vdev; | |
| 1535 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; | |
| 2082 | 1536 vdev_ops_t *pvops; |
| 789 | 1537 |
| 1538 txg = spa_vdev_enter(spa); | |
| 1539 | |
| 1544 | 1540 oldvd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1541 |
| 1542 if (oldvd == NULL) | |
| 1543 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1544 | |
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1545 if (!oldvd->vdev_ops->vdev_op_leaf) |
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1546 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1547 |
| 789 | 1548 pvd = oldvd->vdev_parent; |
| 1549 | |
| 2082 | 1550 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, |
| 1551 VDEV_ALLOC_ADD)) != 0 || newrootvd->vdev_children != 1) | |
| 789 | 1552 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); |
| 1553 | |
| 1554 newvd = newrootvd->vdev_child[0]; | |
| 1555 | |
| 1556 if (!newvd->vdev_ops->vdev_op_leaf) | |
| 1557 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); | |
| 1558 | |
| 2082 | 1559 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) |
| 789 | 1560 return (spa_vdev_exit(spa, newrootvd, txg, error)); |
| 1561 | |
| 2082 | 1562 if (!replacing) { |
| 1563 /* | |
| 1564 * For attach, the only allowable parent is a mirror or the root | |
| 1565 * vdev. | |
| 1566 */ | |
| 1567 if (pvd->vdev_ops != &vdev_mirror_ops && | |
| 1568 pvd->vdev_ops != &vdev_root_ops) | |
| 1569 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1570 | |
| 1571 pvops = &vdev_mirror_ops; | |
| 1572 } else { | |
| 1573 /* | |
| 1574 * Active hot spares can only be replaced by inactive hot | |
| 1575 * spares. | |
| 1576 */ | |
| 1577 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1578 pvd->vdev_child[1] == oldvd && | |
| 1579 !spa_has_spare(spa, newvd->vdev_guid)) | |
| 1580 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1581 | |
| 1582 /* | |
| 1583 * If the source is a hot spare, and the parent isn't already a | |
| 1584 * spare, then we want to create a new hot spare. Otherwise, we | |
| 1585 * want to create a replacing vdev. | |
| 1586 */ | |
| 1587 if (pvd->vdev_ops == &vdev_replacing_ops) | |
| 1588 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1589 else if (pvd->vdev_ops != &vdev_spare_ops && | |
| 1590 newvd->vdev_isspare) | |
| 1591 pvops = &vdev_spare_ops; | |
| 1592 else | |
| 1593 pvops = &vdev_replacing_ops; | |
| 1594 } | |
| 1595 | |
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1596 /* |
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1597 * Compare the new device size with the replaceable/attachable |
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1598 * device size. |
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1599 */ |
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1600 if (newvd->vdev_psize < vdev_get_rsize(oldvd)) |
| 789 | 1601 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); |
| 1602 | |
| 1732 | 1603 /* |
| 1604 * The new device cannot have a higher alignment requirement | |
| 1605 * than the top-level vdev. | |
| 1606 */ | |
| 1607 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) | |
| 789 | 1608 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); |
| 1609 | |
| 1610 /* | |
| 1611 * If this is an in-place replacement, update oldvd's path and devid | |
| 1612 * to make it distinguishable from newvd, and unopenable from now on. | |
| 1613 */ | |
| 1614 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { | |
| 1615 spa_strfree(oldvd->vdev_path); | |
| 1616 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, | |
| 1617 KM_SLEEP); | |
| 1618 (void) sprintf(oldvd->vdev_path, "%s/%s", | |
| 1619 newvd->vdev_path, "old"); | |
| 1620 if (oldvd->vdev_devid != NULL) { | |
| 1621 spa_strfree(oldvd->vdev_devid); | |
| 1622 oldvd->vdev_devid = NULL; | |
| 1623 } | |
| 1624 } | |
| 1625 | |
| 1626 /* | |
| 2082 | 1627 * If the parent is not a mirror, or if we're replacing, insert the new |
| 1628 * mirror/replacing/spare vdev above oldvd. | |
| 789 | 1629 */ |
| 1630 if (pvd->vdev_ops != pvops) | |
| 1631 pvd = vdev_add_parent(oldvd, pvops); | |
| 1632 | |
| 1633 ASSERT(pvd->vdev_top->vdev_parent == rvd); | |
| 1634 ASSERT(pvd->vdev_ops == pvops); | |
| 1635 ASSERT(oldvd->vdev_parent == pvd); | |
| 1636 | |
| 1637 /* | |
| 1638 * Extract the new device from its root and add it to pvd. | |
| 1639 */ | |
| 1640 vdev_remove_child(newrootvd, newvd); | |
| 1641 newvd->vdev_id = pvd->vdev_children; | |
| 1642 vdev_add_child(pvd, newvd); | |
| 1643 | |
| 1544 | 1644 /* |
| 1645 * If newvd is smaller than oldvd, but larger than its rsize, | |
| 1646 * the addition of newvd may have decreased our parent's asize. | |
| 1647 */ | |
| 1648 pvd->vdev_asize = MIN(pvd->vdev_asize, newvd->vdev_asize); | |
| 1649 | |
| 789 | 1650 tvd = newvd->vdev_top; |
| 1651 ASSERT(pvd->vdev_top == tvd); | |
| 1652 ASSERT(tvd->vdev_parent == rvd); | |
| 1653 | |
| 1654 vdev_config_dirty(tvd); | |
| 1655 | |
| 1656 /* | |
| 1657 * Set newvd's DTL to [TXG_INITIAL, open_txg]. It will propagate | |
| 1658 * upward when spa_vdev_exit() calls vdev_dtl_reassess(). | |
| 1659 */ | |
| 1660 open_txg = txg + TXG_CONCURRENT_STATES - 1; | |
| 1661 | |
| 1662 mutex_enter(&newvd->vdev_dtl_lock); | |
| 1663 space_map_add(&newvd->vdev_dtl_map, TXG_INITIAL, | |
| 1664 open_txg - TXG_INITIAL + 1); | |
| 1665 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1666 | |
| 1544 | 1667 dprintf("attached %s in txg %llu\n", newvd->vdev_path, txg); |
| 1668 | |
| 789 | 1669 /* |
| 1670 * Mark newvd's DTL dirty in this txg. | |
| 1671 */ | |
| 1732 | 1672 vdev_dirty(tvd, VDD_DTL, newvd, txg); |
| 789 | 1673 |
| 1674 (void) spa_vdev_exit(spa, newrootvd, open_txg, 0); | |
| 1675 | |
| 1676 /* | |
| 1677 * Kick off a resilver to update newvd. | |
| 1678 */ | |
| 1679 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1680 | |
| 1681 return (0); | |
| 1682 } | |
| 1683 | |
| 1684 /* | |
| 1685 * Detach a device from a mirror or replacing vdev. | |
| 1686 * If 'replace_done' is specified, only detach if the parent | |
| 1687 * is a replacing vdev. | |
| 1688 */ | |
| 1689 int | |
| 1544 | 1690 spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) |
| 789 | 1691 { |
| 1692 uint64_t txg; | |
| 1693 int c, t, error; | |
| 1694 vdev_t *rvd = spa->spa_root_vdev; | |
| 1695 vdev_t *vd, *pvd, *cvd, *tvd; | |
| 2082 | 1696 boolean_t unspare = B_FALSE; |
| 1697 uint64_t unspare_guid; | |
| 789 | 1698 |
| 1699 txg = spa_vdev_enter(spa); | |
| 1700 | |
| 1544 | 1701 vd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1702 |
| 1703 if (vd == NULL) | |
| 1704 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1705 | |
|
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1706 if (!vd->vdev_ops->vdev_op_leaf) |
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1707 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1708 |
| 789 | 1709 pvd = vd->vdev_parent; |
| 1710 | |
| 1711 /* | |
| 1712 * If replace_done is specified, only remove this device if it's | |
| 2082 | 1713 * the first child of a replacing vdev. For the 'spare' vdev, either |
| 1714 * disk can be removed. | |
| 789 | 1715 */ |
| 2082 | 1716 if (replace_done) { |
| 1717 if (pvd->vdev_ops == &vdev_replacing_ops) { | |
| 1718 if (vd->vdev_id != 0) | |
| 1719 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1720 } else if (pvd->vdev_ops != &vdev_spare_ops) { | |
| 1721 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1722 } | |
| 1723 } | |
| 1724 | |
| 1725 ASSERT(pvd->vdev_ops != &vdev_spare_ops || | |
| 1726 spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 789 | 1727 |
| 1728 /* | |
| 2082 | 1729 * Only mirror, replacing, and spare vdevs support detach. |
| 789 | 1730 */ |
| 1731 if (pvd->vdev_ops != &vdev_replacing_ops && | |
| 2082 | 1732 pvd->vdev_ops != &vdev_mirror_ops && |
| 1733 pvd->vdev_ops != &vdev_spare_ops) | |
| 789 | 1734 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
| 1735 | |
| 1736 /* | |
| 1737 * If there's only one replica, you can't detach it. | |
| 1738 */ | |
| 1739 if (pvd->vdev_children <= 1) | |
| 1740 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
| 1741 | |
| 1742 /* | |
| 1743 * If all siblings have non-empty DTLs, this device may have the only | |
| 1744 * valid copy of the data, which means we cannot safely detach it. | |
| 1745 * | |
| 1746 * XXX -- as in the vdev_offline() case, we really want a more | |
| 1747 * precise DTL check. | |
| 1748 */ | |
| 1749 for (c = 0; c < pvd->vdev_children; c++) { | |
| 1750 uint64_t dirty; | |
| 1751 | |
| 1752 cvd = pvd->vdev_child[c]; | |
| 1753 if (cvd == vd) | |
| 1754 continue; | |
| 1755 if (vdev_is_dead(cvd)) | |
| 1756 continue; | |
| 1757 mutex_enter(&cvd->vdev_dtl_lock); | |
| 1758 dirty = cvd->vdev_dtl_map.sm_space | | |
| 1759 cvd->vdev_dtl_scrub.sm_space; | |
| 1760 mutex_exit(&cvd->vdev_dtl_lock); | |
| 1761 if (!dirty) | |
| 1762 break; | |
| 1763 } | |
| 2082 | 1764 |
| 1765 /* | |
| 1766 * If we are a replacing or spare vdev, then we can always detach the | |
| 1767 * latter child, as that is how one cancels the operation. | |
| 1768 */ | |
| 1769 if ((pvd->vdev_ops == &vdev_mirror_ops || vd->vdev_id != 1) && | |
| 1770 c == pvd->vdev_children) | |
| 789 | 1771 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); |
| 1772 | |
| 1773 /* | |
| 2082 | 1774 * If we are detaching the original disk from a spare, then it implies |
| 1775 * that the spare should become a real disk, and be removed from the | |
| 1776 * active spare list for the pool. | |
| 1777 */ | |
| 1778 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1779 vd->vdev_id == 0) | |
| 1780 unspare = B_TRUE; | |
| 1781 | |
| 1782 /* | |
| 789 | 1783 * Erase the disk labels so the disk can be used for other things. |
| 1784 * This must be done after all other error cases are handled, | |
| 1785 * but before we disembowel vd (so we can still do I/O to it). | |
| 1786 * But if we can't do it, don't treat the error as fatal -- | |
| 1787 * it may be that the unwritability of the disk is the reason | |
| 1788 * it's being detached! | |
| 1789 */ | |
| 2082 | 1790 error = vdev_label_init(vd, 0, B_FALSE); |
| 789 | 1791 if (error) |
| 1792 dprintf("unable to erase labels on %s\n", vdev_description(vd)); | |
| 1793 | |
| 1794 /* | |
| 1795 * Remove vd from its parent and compact the parent's children. | |
| 1796 */ | |
| 1797 vdev_remove_child(pvd, vd); | |
| 1798 vdev_compact_children(pvd); | |
| 1799 | |
| 1800 /* | |
| 1801 * Remember one of the remaining children so we can get tvd below. | |
| 1802 */ | |
| 1803 cvd = pvd->vdev_child[0]; | |
| 1804 | |
| 1805 /* | |
| 2082 | 1806 * If we need to remove the remaining child from the list of hot spares, |
| 1807 * do it now, marking the vdev as no longer a spare in the process. We | |
| 1808 * must do this before vdev_remove_parent(), because that can change the | |
| 1809 * GUID if it creates a new toplevel GUID. | |
| 1810 */ | |
| 1811 if (unspare) { | |
| 1812 ASSERT(cvd->vdev_isspare); | |
| 1813 spa_spare_remove(cvd->vdev_guid); | |
| 1814 cvd->vdev_isspare = B_FALSE; | |
| 1815 unspare_guid = cvd->vdev_guid; | |
| 1816 } | |
| 1817 | |
| 1818 /* | |
| 789 | 1819 * If the parent mirror/replacing vdev only has one child, |
| 1820 * the parent is no longer needed. Remove it from the tree. | |
| 1821 */ | |
| 1822 if (pvd->vdev_children == 1) | |
| 1823 vdev_remove_parent(cvd); | |
| 1824 | |
| 1825 /* | |
| 1826 * We don't set tvd until now because the parent we just removed | |
| 1827 * may have been the previous top-level vdev. | |
| 1828 */ | |
| 1829 tvd = cvd->vdev_top; | |
| 1830 ASSERT(tvd->vdev_parent == rvd); | |
| 1831 | |
| 1832 /* | |
| 1833 * Reopen this top-level vdev to reassess health after detach. | |
| 1834 */ | |
| 1544 | 1835 vdev_reopen(tvd); |
| 789 | 1836 |
| 1837 /* | |
| 1838 * If the device we just detached was smaller than the others, | |
| 1732 | 1839 * it may be possible to add metaslabs (i.e. grow the pool). |
| 1840 * vdev_metaslab_init() can't fail because the existing metaslabs | |
| 1841 * are already in core, so there's nothing to read from disk. | |
| 789 | 1842 */ |
| 1732 | 1843 VERIFY(vdev_metaslab_init(tvd, txg) == 0); |
| 789 | 1844 |
| 1845 vdev_config_dirty(tvd); | |
| 1846 | |
| 1847 /* | |
| 1848 * Mark vd's DTL as dirty in this txg. | |
| 1849 * vdev_dtl_sync() will see that vd->vdev_detached is set | |
| 1850 * and free vd's DTL object in syncing context. | |
| 1851 * But first make sure we're not on any *other* txg's DTL list, | |
| 1852 * to prevent vd from being accessed after it's freed. | |
| 1853 */ | |
| 1854 for (t = 0; t < TXG_SIZE; t++) | |
| 1855 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); | |
| 1732 | 1856 vd->vdev_detached = B_TRUE; |
| 1857 vdev_dirty(tvd, VDD_DTL, vd, txg); | |
| 789 | 1858 |
| 1544 | 1859 dprintf("detached %s in txg %llu\n", vd->vdev_path, txg); |
| 789 | 1860 |
| 2082 | 1861 error = spa_vdev_exit(spa, vd, txg, 0); |
| 1862 | |
| 1863 /* | |
| 1864 * If we are supposed to remove the given vdev from the list of spares, | |
| 1865 * iterate over all pools in the system and replace it if it's present. | |
| 1866 */ | |
| 1867 if (unspare) { | |
| 1868 spa = NULL; | |
| 1869 mutex_enter(&spa_namespace_lock); | |
| 1870 while ((spa = spa_next(spa)) != NULL) { | |
| 1871 if (spa->spa_state != POOL_STATE_ACTIVE) | |
| 1872 continue; | |
| 1873 | |
| 1874 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); | |
| 1875 } | |
| 1876 mutex_exit(&spa_namespace_lock); | |
| 1877 } | |
| 1878 | |
| 1879 return (error); | |
| 1880 } | |
| 1881 | |
| 1882 /* | |
| 1883 * Remove a device from the pool. Currently, this supports removing only hot | |
| 1884 * spares. | |
| 1885 */ | |
| 1886 int | |
| 1887 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) | |
| 1888 { | |
| 1889 vdev_t *vd; | |
| 1890 nvlist_t **spares, *nv, **newspares; | |
| 1891 uint_t i, j, nspares; | |
| 1892 int ret = 0; | |
| 1893 | |
| 1894 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1895 | |
| 1896 vd = spa_lookup_by_guid(spa, guid); | |
| 1897 | |
| 1898 nv = NULL; | |
| 1899 if (spa->spa_spares != NULL && | |
| 1900 nvlist_lookup_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1901 &spares, &nspares) == 0) { | |
| 1902 for (i = 0; i < nspares; i++) { | |
| 1903 uint64_t theguid; | |
| 1904 | |
| 1905 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 1906 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 1907 if (theguid == guid) { | |
| 1908 nv = spares[i]; | |
| 1909 break; | |
| 1910 } | |
| 1911 } | |
| 1912 } | |
| 1913 | |
| 1914 /* | |
| 1915 * We only support removing a hot spare, and only if it's not currently | |
| 1916 * in use in this pool. | |
| 1917 */ | |
| 1918 if (nv == NULL && vd == NULL) { | |
| 1919 ret = ENOENT; | |
| 1920 goto out; | |
| 1921 } | |
| 1922 | |
| 1923 if (nv == NULL && vd != NULL) { | |
| 1924 ret = ENOTSUP; | |
| 1925 goto out; | |
| 1926 } | |
| 1927 | |
| 1928 if (!unspare && nv != NULL && vd != NULL) { | |
| 1929 ret = EBUSY; | |
| 1930 goto out; | |
| 1931 } | |
| 1932 | |
| 1933 if (nspares == 1) { | |
| 1934 newspares = NULL; | |
| 1935 } else { | |
| 1936 newspares = kmem_alloc((nspares - 1) * sizeof (void *), | |
| 1937 KM_SLEEP); | |
| 1938 for (i = 0, j = 0; i < nspares; i++) { | |
| 1939 if (spares[i] != nv) | |
| 1940 VERIFY(nvlist_dup(spares[i], | |
| 1941 &newspares[j++], KM_SLEEP) == 0); | |
| 1942 } | |
| 1943 } | |
| 1944 | |
| 1945 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1946 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1947 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1948 newspares, nspares - 1) == 0); | |
| 1949 for (i = 0; i < nspares - 1; i++) | |
| 1950 nvlist_free(newspares[i]); | |
| 1951 kmem_free(newspares, (nspares - 1) * sizeof (void *)); | |
| 1952 spa_load_spares(spa); | |
| 1953 spa->spa_sync_spares = B_TRUE; | |
| 1954 | |
| 1955 out: | |
| 1956 spa_config_exit(spa, FTAG); | |
| 1957 | |
| 1958 return (ret); | |
| 789 | 1959 } |
| 1960 | |
| 1961 /* | |
| 1544 | 1962 * Find any device that's done replacing, so we can detach it. |
| 789 | 1963 */ |
| 1544 | 1964 static vdev_t * |
| 1965 spa_vdev_replace_done_hunt(vdev_t *vd) | |
| 789 | 1966 { |
| 1544 | 1967 vdev_t *newvd, *oldvd; |
| 789 | 1968 int c; |
| 1969 | |
| 1544 | 1970 for (c = 0; c < vd->vdev_children; c++) { |
| 1971 oldvd = spa_vdev_replace_done_hunt(vd->vdev_child[c]); | |
| 1972 if (oldvd != NULL) | |
| 1973 return (oldvd); | |
| 1974 } | |
| 789 | 1975 |
| 1976 if (vd->vdev_ops == &vdev_replacing_ops && vd->vdev_children == 2) { | |
| 1544 | 1977 oldvd = vd->vdev_child[0]; |
| 1978 newvd = vd->vdev_child[1]; | |
| 789 | 1979 |
| 1544 | 1980 mutex_enter(&newvd->vdev_dtl_lock); |
| 1981 if (newvd->vdev_dtl_map.sm_space == 0 && | |
| 1982 newvd->vdev_dtl_scrub.sm_space == 0) { | |
| 1983 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1984 return (oldvd); | |
| 1985 } | |
| 1986 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1987 } | |
| 789 | 1988 |
| 1544 | 1989 return (NULL); |
| 789 | 1990 } |
| 1991 | |
| 1544 | 1992 static void |
| 789 | 1993 spa_vdev_replace_done(spa_t *spa) |
| 1994 { | |
| 1544 | 1995 vdev_t *vd; |
| 2082 | 1996 vdev_t *pvd; |
| 1544 | 1997 uint64_t guid; |
| 2082 | 1998 uint64_t pguid = 0; |
| 789 | 1999 |
| 1544 | 2000 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2001 |
| 1544 | 2002 while ((vd = spa_vdev_replace_done_hunt(spa->spa_root_vdev)) != NULL) { |
| 2003 guid = vd->vdev_guid; | |
| 2082 | 2004 /* |
| 2005 * If we have just finished replacing a hot spared device, then | |
| 2006 * we need to detach the parent's first child (the original hot | |
| 2007 * spare) as well. | |
| 2008 */ | |
| 2009 pvd = vd->vdev_parent; | |
| 2010 if (pvd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
| 2011 pvd->vdev_id == 0) { | |
| 2012 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); | |
| 2013 ASSERT(pvd->vdev_parent->vdev_children == 2); | |
| 2014 pguid = pvd->vdev_parent->vdev_child[1]->vdev_guid; | |
| 2015 } | |
| 1544 | 2016 spa_config_exit(spa, FTAG); |
| 2017 if (spa_vdev_detach(spa, guid, B_TRUE) != 0) | |
| 2018 return; | |
| 2082 | 2019 if (pguid != 0 && spa_vdev_detach(spa, pguid, B_TRUE) != 0) |
| 2020 return; | |
| 1544 | 2021 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2022 } |
| 2023 | |
| 1544 | 2024 spa_config_exit(spa, FTAG); |
| 789 | 2025 } |
| 2026 | |
| 2027 /* | |
|
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2028 * Update the stored path for this vdev. Dirty the vdev configuration, relying |
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2029 * on spa_vdev_enter/exit() to synchronize the labels and cache. |
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2030 */ |
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2031 int |
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2032 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) |
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2033 { |
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2034 vdev_t *rvd, *vd; |
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2035 uint64_t txg; |
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2036 |
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2037 rvd = spa->spa_root_vdev; |
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2038 |
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2039 txg = spa_vdev_enter(spa); |
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2040 |
| 2082 | 2041 if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) { |
| 2042 /* | |
| 2043 * Determine if this is a reference to a hot spare. In that | |
| 2044 * case, update the path as stored in the spare list. | |
| 2045 */ | |
| 2046 nvlist_t **spares; | |
| 2047 uint_t i, nspares; | |
| 2048 if (spa->spa_sparelist != NULL) { | |
| 2049 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 2050 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 2051 for (i = 0; i < nspares; i++) { | |
| 2052 uint64_t theguid; | |
| 2053 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 2054 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 2055 if (theguid == guid) | |
| 2056 break; | |
| 2057 } | |
| 2058 | |
| 2059 if (i == nspares) | |
| 2060 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2061 | |
| 2062 VERIFY(nvlist_add_string(spares[i], | |
| 2063 ZPOOL_CONFIG_PATH, newpath) == 0); | |
| 2064 spa_load_spares(spa); | |
| 2065 spa->spa_sync_spares = B_TRUE; | |
| 2066 return (spa_vdev_exit(spa, NULL, txg, 0)); | |
| 2067 } else { | |
| 2068 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2069 } | |
| 2070 } | |
|
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2071 |
|
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2072 if (!vd->vdev_ops->vdev_op_leaf) |
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2073 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
|
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2074 |
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2075 spa_strfree(vd->vdev_path); |
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2076 vd->vdev_path = spa_strdup(newpath); |
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2077 |
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2078 vdev_config_dirty(vd->vdev_top); |
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2079 |
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2080 return (spa_vdev_exit(spa, NULL, txg, 0)); |
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2081 } |
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2082 |
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2083 /* |
| 789 | 2084 * ========================================================================== |
| 2085 * SPA Scrubbing | |
| 2086 * ========================================================================== | |
| 2087 */ | |
| 2088 | |
| 1544 | 2089 void |
| 2090 spa_scrub_throttle(spa_t *spa, int direction) | |
| 2091 { | |
| 2092 mutex_enter(&spa->spa_scrub_lock); | |
| 2093 spa->spa_scrub_throttled += direction; | |
| 2094 ASSERT(spa->spa_scrub_throttled >= 0); | |
| 2095 if (spa->spa_scrub_throttled == 0) | |
| 2096 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 2097 mutex_exit(&spa->spa_scrub_lock); | |
| 2098 } | |
| 789 | 2099 |
| 2100 static void | |
| 2101 spa_scrub_io_done(zio_t *zio) | |
| 2102 { | |
| 2103 spa_t *spa = zio->io_spa; | |
| 2104 | |
| 2105 zio_buf_free(zio->io_data, zio->io_size); | |
| 2106 | |
| 2107 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2108 if (zio->io_error && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { |
|
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2109 vdev_t *vd = zio->io_vd ? zio->io_vd : spa->spa_root_vdev; |
| 789 | 2110 spa->spa_scrub_errors++; |
| 2111 mutex_enter(&vd->vdev_stat_lock); | |
| 2112 vd->vdev_stat.vs_scrub_errors++; | |
| 2113 mutex_exit(&vd->vdev_stat_lock); | |
| 2114 } | |
| 1544 | 2115 if (--spa->spa_scrub_inflight == 0) { |
| 2116 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 2117 ASSERT(spa->spa_scrub_throttled == 0); | |
| 2118 } | |
| 2119 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 2120 } |
| 2121 | |
| 2122 static void | |
| 1544 | 2123 spa_scrub_io_start(spa_t *spa, blkptr_t *bp, int priority, int flags, |
| 2124 zbookmark_t *zb) | |
| 789 | 2125 { |
| 2126 size_t size = BP_GET_LSIZE(bp); | |
| 2127 void *data = zio_buf_alloc(size); | |
| 2128 | |
| 2129 mutex_enter(&spa->spa_scrub_lock); | |
| 2130 spa->spa_scrub_inflight++; | |
| 2131 mutex_exit(&spa->spa_scrub_lock); | |
| 2132 | |
| 1544 | 2133 if (zb->zb_level == -1 && BP_GET_TYPE(bp) != DMU_OT_OBJSET) |
| 2134 flags |= ZIO_FLAG_SPECULATIVE; /* intent log block */ | |
| 2135 | |
|
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2136 flags |= ZIO_FLAG_SCRUB_THREAD | ZIO_FLAG_CANFAIL; |
| 1544 | 2137 |
| 789 | 2138 zio_nowait(zio_read(NULL, spa, bp, data, size, |
| 1544 | 2139 spa_scrub_io_done, NULL, priority, flags, zb)); |
| 789 | 2140 } |
| 2141 | |
| 2142 /* ARGSUSED */ | |
| 2143 static int | |
| 2144 spa_scrub_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a) | |
| 2145 { | |
| 2146 blkptr_t *bp = &bc->bc_blkptr; | |
|
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2147 vdev_t *vd = spa->spa_root_vdev; |
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2148 dva_t *dva = bp->blk_dva; |
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2149 int needs_resilver = B_FALSE; |
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2150 int d; |
| 789 | 2151 |
|
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2152 if (bc->bc_errno) { |
| 789 | 2153 /* |
| 2154 * We can't scrub this block, but we can continue to scrub | |
| 2155 * the rest of the pool. Note the error and move along. | |
| 2156 */ | |
| 2157 mutex_enter(&spa->spa_scrub_lock); | |
| 2158 spa->spa_scrub_errors++; | |
| 2159 mutex_exit(&spa->spa_scrub_lock); | |
| 2160 | |
|
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2161 mutex_enter(&vd->vdev_stat_lock); |
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2162 vd->vdev_stat.vs_scrub_errors++; |
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2163 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2164 |
| 2165 return (ERESTART); | |
| 2166 } | |
| 2167 | |
| 2168 ASSERT(bp->blk_birth < spa->spa_scrub_maxtxg); | |
| 2169 | |
|
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2170 for (d = 0; d < BP_GET_NDVAS(bp); d++) { |
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2171 vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dva[d])); |
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2172 |
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2173 ASSERT(vd != NULL); |
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2174 |
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2175 /* |
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2176 * Keep track of how much data we've examined so that |
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2177 * zpool(1M) status can make useful progress reports. |
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2178 */ |
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2179 mutex_enter(&vd->vdev_stat_lock); |
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2180 vd->vdev_stat.vs_scrub_examined += DVA_GET_ASIZE(&dva[d]); |
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2181 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2182 |
|
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2183 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER) { |
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2184 if (DVA_GET_GANG(&dva[d])) { |
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2185 /* |
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2186 * Gang members may be spread across multiple |
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2187 * vdevs, so the best we can do is look at the |
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2188 * pool-wide DTL. |
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2189 * XXX -- it would be better to change our |
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2190 * allocation policy to ensure that this can't |
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2191 * happen. |
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2192 */ |
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2193 vd = spa->spa_root_vdev; |
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2194 } |
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2195 if (vdev_dtl_contains(&vd->vdev_dtl_map, |
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2196 bp->blk_birth, 1)) |
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2197 needs_resilver = B_TRUE; |
| 789 | 2198 } |
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2199 } |
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2200 |
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2201 if (spa->spa_scrub_type == POOL_SCRUB_EVERYTHING) |
| 789 | 2202 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_SCRUB, |
| 1544 | 2203 ZIO_FLAG_SCRUB, &bc->bc_bookmark); |
|
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2204 else if (needs_resilver) |
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2205 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_RESILVER, |
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2206 ZIO_FLAG_RESILVER, &bc->bc_bookmark); |
| 789 | 2207 |
| 2208 return (0); | |
| 2209 } | |
| 2210 | |
| 2211 static void | |
| 2212 spa_scrub_thread(spa_t *spa) | |
| 2213 { | |
| 2214 callb_cpr_t cprinfo; | |
| 2215 traverse_handle_t *th = spa->spa_scrub_th; | |
| 2216 vdev_t *rvd = spa->spa_root_vdev; | |
| 2217 pool_scrub_type_t scrub_type = spa->spa_scrub_type; | |
| 2218 int error = 0; | |
| 2219 boolean_t complete; | |
| 2220 | |
| 2221 CALLB_CPR_INIT(&cprinfo, &spa->spa_scrub_lock, callb_generic_cpr, FTAG); | |
| 2222 | |
|
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2223 /* |
|
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|
2224 * If we're restarting due to a snapshot create/delete, |
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2225 * wait for that to complete. |
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2226 */ |
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2227 txg_wait_synced(spa_get_dsl(spa), 0); |
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2228 |
| 1544 | 2229 dprintf("start %s mintxg=%llu maxtxg=%llu\n", |
| 2230 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 2231 spa->spa_scrub_mintxg, spa->spa_scrub_maxtxg); | |
| 2232 | |
| 2233 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2234 vdev_reopen(rvd); /* purge all vdev caches */ | |
| 789 | 2235 vdev_config_dirty(rvd); /* rewrite all disk labels */ |
| 2236 vdev_scrub_stat_update(rvd, scrub_type, B_FALSE); | |
| 1544 | 2237 spa_config_exit(spa, FTAG); |
| 789 | 2238 |
| 2239 mutex_enter(&spa->spa_scrub_lock); | |
| 2240 spa->spa_scrub_errors = 0; | |
| 2241 spa->spa_scrub_active = 1; | |
| 1544 | 2242 ASSERT(spa->spa_scrub_inflight == 0); |
| 2243 ASSERT(spa->spa_scrub_throttled == 0); | |
| 789 | 2244 |
| 2245 while (!spa->spa_scrub_stop) { | |
| 2246 CALLB_CPR_SAFE_BEGIN(&cprinfo); | |
| 1544 | 2247 while (spa->spa_scrub_suspended) { |
| 789 | 2248 spa->spa_scrub_active = 0; |
| 2249 cv_broadcast(&spa->spa_scrub_cv); | |
| 2250 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2251 spa->spa_scrub_active = 1; | |
| 2252 } | |
| 2253 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_scrub_lock); | |
| 2254 | |
| 2255 if (spa->spa_scrub_restart_txg != 0) | |
| 2256 break; | |
| 2257 | |
| 2258 mutex_exit(&spa->spa_scrub_lock); | |
| 2259 error = traverse_more(th); | |
| 2260 mutex_enter(&spa->spa_scrub_lock); | |
| 2261 if (error != EAGAIN) | |
| 2262 break; | |
| 1544 | 2263 |
| 2264 while (spa->spa_scrub_throttled > 0) | |
| 2265 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 789 | 2266 } |
| 2267 | |
| 2268 while (spa->spa_scrub_inflight) | |
| 2269 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2270 | |
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2271 spa->spa_scrub_active = 0; |
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2272 cv_broadcast(&spa->spa_scrub_cv); |
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2273 |
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2274 mutex_exit(&spa->spa_scrub_lock); |
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2275 |
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2276 spa_config_enter(spa, RW_WRITER, FTAG); |
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2277 |
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2278 mutex_enter(&spa->spa_scrub_lock); |
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2279 |
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2280 /* |
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2281 * Note: we check spa_scrub_restart_txg under both spa_scrub_lock |
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2282 * AND the spa config lock to synchronize with any config changes |
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2283 * that revise the DTLs under spa_vdev_enter() / spa_vdev_exit(). |
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2284 */ |
| 789 | 2285 if (spa->spa_scrub_restart_txg != 0) |
| 2286 error = ERESTART; | |
| 2287 | |
| 1544 | 2288 if (spa->spa_scrub_stop) |
| 2289 error = EINTR; | |
| 2290 | |
| 789 | 2291 /* |
| 1544 | 2292 * Even if there were uncorrectable errors, we consider the scrub |
| 2293 * completed. The downside is that if there is a transient error during | |
| 2294 * a resilver, we won't resilver the data properly to the target. But | |
| 2295 * if the damage is permanent (more likely) we will resilver forever, | |
| 2296 * which isn't really acceptable. Since there is enough information for | |
| 2297 * the user to know what has failed and why, this seems like a more | |
| 2298 * tractable approach. | |
| 789 | 2299 */ |
| 1544 | 2300 complete = (error == 0); |
| 789 | 2301 |
| 1544 | 2302 dprintf("end %s to maxtxg=%llu %s, traverse=%d, %llu errors, stop=%u\n", |
| 2303 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 789 | 2304 spa->spa_scrub_maxtxg, complete ? "done" : "FAILED", |
| 2305 error, spa->spa_scrub_errors, spa->spa_scrub_stop); | |
| 2306 | |
| 2307 mutex_exit(&spa->spa_scrub_lock); | |
| 2308 | |
| 2309 /* | |
| 2310 * If the scrub/resilver completed, update all DTLs to reflect this. | |
| 2311 * Whether it succeeded or not, vacate all temporary scrub DTLs. | |
| 2312 */ | |
| 2313 vdev_dtl_reassess(rvd, spa_last_synced_txg(spa) + 1, | |
| 2314 complete ? spa->spa_scrub_maxtxg : 0, B_TRUE); | |
| 2315 vdev_scrub_stat_update(rvd, POOL_SCRUB_NONE, complete); | |
| 1544 | 2316 spa_errlog_rotate(spa); |
|
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2317 |
| 1544 | 2318 spa_config_exit(spa, FTAG); |
| 789 | 2319 |
| 2320 mutex_enter(&spa->spa_scrub_lock); | |
| 2321 | |
| 1544 | 2322 /* |
| 2323 * We may have finished replacing a device. | |
| 2324 * Let the async thread assess this and handle the detach. | |
| 2325 */ | |
| 2326 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); | |
| 789 | 2327 |
| 2328 /* | |
| 2329 * If we were told to restart, our final act is to start a new scrub. | |
| 2330 */ | |
| 2331 if (error == ERESTART) | |
| 1544 | 2332 spa_async_request(spa, scrub_type == POOL_SCRUB_RESILVER ? |
| 2333 SPA_ASYNC_RESILVER : SPA_ASYNC_SCRUB); | |
| 789 | 2334 |
| 1544 | 2335 spa->spa_scrub_type = POOL_SCRUB_NONE; |
| 2336 spa->spa_scrub_active = 0; | |
| 2337 spa->spa_scrub_thread = NULL; | |
| 2338 cv_broadcast(&spa->spa_scrub_cv); | |
| 789 | 2339 CALLB_CPR_EXIT(&cprinfo); /* drops &spa->spa_scrub_lock */ |
| 2340 thread_exit(); | |
| 2341 } | |
| 2342 | |
| 2343 void | |
| 2344 spa_scrub_suspend(spa_t *spa) | |
| 2345 { | |
| 2346 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2347 spa->spa_scrub_suspended++; |
| 789 | 2348 while (spa->spa_scrub_active) { |
| 2349 cv_broadcast(&spa->spa_scrub_cv); | |
| 2350 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2351 } | |
| 2352 while (spa->spa_scrub_inflight) | |
| 2353 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2354 mutex_exit(&spa->spa_scrub_lock); | |
| 2355 } | |
| 2356 | |
| 2357 void | |
| 2358 spa_scrub_resume(spa_t *spa) | |
| 2359 { | |
| 2360 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2361 ASSERT(spa->spa_scrub_suspended != 0); |
| 2362 if (--spa->spa_scrub_suspended == 0) | |
| 789 | 2363 cv_broadcast(&spa->spa_scrub_cv); |
| 2364 mutex_exit(&spa->spa_scrub_lock); | |
| 2365 } | |
| 2366 | |
| 2367 void | |
| 2368 spa_scrub_restart(spa_t *spa, uint64_t txg) | |
| 2369 { | |
| 2370 /* | |
| 2371 * Something happened (e.g. snapshot create/delete) that means | |
| 2372 * we must restart any in-progress scrubs. The itinerary will | |
| 2373 * fix this properly. | |
| 2374 */ | |
| 2375 mutex_enter(&spa->spa_scrub_lock); | |
| 2376 spa->spa_scrub_restart_txg = txg; | |
| 2377 mutex_exit(&spa->spa_scrub_lock); | |
| 2378 } | |
| 2379 | |
| 1544 | 2380 int |
| 2381 spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force) | |
| 789 | 2382 { |
| 2383 space_seg_t *ss; | |
| 2384 uint64_t mintxg, maxtxg; | |
| 2385 vdev_t *rvd = spa->spa_root_vdev; | |
| 2386 | |
| 2387 if ((uint_t)type >= POOL_SCRUB_TYPES) | |
| 2388 return (ENOTSUP); | |
| 2389 | |
| 1544 | 2390 mutex_enter(&spa->spa_scrub_lock); |
| 2391 | |
| 789 | 2392 /* |
| 2393 * If there's a scrub or resilver already in progress, stop it. | |
| 2394 */ | |
| 2395 while (spa->spa_scrub_thread != NULL) { | |
| 2396 /* | |
| 2397 * Don't stop a resilver unless forced. | |
| 2398 */ | |
| 1544 | 2399 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER && !force) { |
| 2400 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 2401 return (EBUSY); |
| 1544 | 2402 } |
| 789 | 2403 spa->spa_scrub_stop = 1; |
| 2404 cv_broadcast(&spa->spa_scrub_cv); | |
| 2405 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2406 } | |
| 2407 | |
| 2408 /* | |
| 2409 * Terminate the previous traverse. | |
| 2410 */ | |
| 2411 if (spa->spa_scrub_th != NULL) { | |
| 2412 traverse_fini(spa->spa_scrub_th); | |
| 2413 spa->spa_scrub_th = NULL; | |
| 2414 } | |
| 2415 | |
| 1544 | 2416 if (rvd == NULL) { |
| 2417 ASSERT(spa->spa_scrub_stop == 0); | |
| 2418 ASSERT(spa->spa_scrub_type == type); | |
| 2419 ASSERT(spa->spa_scrub_restart_txg == 0); | |
| 2420 mutex_exit(&spa->spa_scrub_lock); | |
| 2421 return (0); | |
| 2422 } | |
| 789 | 2423 |
| 2424 mintxg = TXG_INITIAL - 1; | |
| 2425 maxtxg = spa_last_synced_txg(spa) + 1; | |
| 2426 | |
| 1544 | 2427 mutex_enter(&rvd->vdev_dtl_lock); |
| 789 | 2428 |
| 1544 | 2429 if (rvd->vdev_dtl_map.sm_space == 0) { |
| 2430 /* | |
| 2431 * The pool-wide DTL is empty. | |
| 1732 | 2432 * If this is a resilver, there's nothing to do except |
| 2433 * check whether any in-progress replacements have completed. | |
| 1544 | 2434 */ |
| 1732 | 2435 if (type == POOL_SCRUB_RESILVER) { |
| 1544 | 2436 type = POOL_SCRUB_NONE; |
| 1732 | 2437 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); |
| 2438 } | |
| 1544 | 2439 } else { |
| 2440 /* | |
| 2441 * The pool-wide DTL is non-empty. | |
| 2442 * If this is a normal scrub, upgrade to a resilver instead. | |
| 2443 */ | |
| 2444 if (type == POOL_SCRUB_EVERYTHING) | |
| 2445 type = POOL_SCRUB_RESILVER; | |
| 2446 } | |
| 789 | 2447 |
| 1544 | 2448 if (type == POOL_SCRUB_RESILVER) { |
| 789 | 2449 /* |
| 2450 * Determine the resilvering boundaries. | |
| 2451 * | |
| 2452 * Note: (mintxg, maxtxg) is an open interval, | |
| 2453 * i.e. mintxg and maxtxg themselves are not included. | |
| 2454 * | |
| 2455 * Note: for maxtxg, we MIN with spa_last_synced_txg(spa) + 1 | |
| 2456 * so we don't claim to resilver a txg that's still changing. | |
| 2457 */ | |
| 2458 ss = avl_first(&rvd->vdev_dtl_map.sm_root); | |
| 1544 | 2459 mintxg = ss->ss_start - 1; |
| 789 | 2460 ss = avl_last(&rvd->vdev_dtl_map.sm_root); |
| 1544 | 2461 maxtxg = MIN(ss->ss_end, maxtxg); |
| 789 | 2462 } |
| 2463 | |
| 1544 | 2464 mutex_exit(&rvd->vdev_dtl_lock); |
| 2465 | |
| 2466 spa->spa_scrub_stop = 0; | |
| 2467 spa->spa_scrub_type = type; | |
| 2468 spa->spa_scrub_restart_txg = 0; | |
| 2469 | |
| 2470 if (type != POOL_SCRUB_NONE) { | |
| 2471 spa->spa_scrub_mintxg = mintxg; | |
| 789 | 2472 spa->spa_scrub_maxtxg = maxtxg; |
| 2473 spa->spa_scrub_th = traverse_init(spa, spa_scrub_cb, NULL, | |
|
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2474 ADVANCE_PRE | ADVANCE_PRUNE | ADVANCE_ZIL, |
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2475 ZIO_FLAG_CANFAIL); |
| 789 | 2476 traverse_add_pool(spa->spa_scrub_th, mintxg, maxtxg); |
| 2477 spa->spa_scrub_thread = thread_create(NULL, 0, | |
| 2478 spa_scrub_thread, spa, 0, &p0, TS_RUN, minclsyspri); | |
| 2479 } | |
| 2480 | |
| 1544 | 2481 mutex_exit(&spa->spa_scrub_lock); |
| 2482 | |
| 789 | 2483 return (0); |
| 2484 } | |
| 2485 | |
| 1544 | 2486 /* |
| 2487 * ========================================================================== | |
| 2488 * SPA async task processing | |
| 2489 * ========================================================================== | |
| 2490 */ | |
| 2491 | |
| 2492 static void | |
| 2493 spa_async_reopen(spa_t *spa) | |
| 789 | 2494 { |
| 1544 | 2495 vdev_t *rvd = spa->spa_root_vdev; |
| 2496 vdev_t *tvd; | |
| 2497 int c; | |
| 2498 | |
| 2499 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2500 | |
| 2501 for (c = 0; c < rvd->vdev_children; c++) { | |
| 2502 tvd = rvd->vdev_child[c]; | |
| 2503 if (tvd->vdev_reopen_wanted) { | |
| 2504 tvd->vdev_reopen_wanted = 0; | |
| 2505 vdev_reopen(tvd); | |
| 2506 } | |
| 2507 } | |
| 789 | 2508 |
| 1544 | 2509 spa_config_exit(spa, FTAG); |
| 2510 } | |
| 2511 | |
| 2512 static void | |
| 2513 spa_async_thread(spa_t *spa) | |
| 2514 { | |
| 2515 int tasks; | |
| 2516 | |
| 2517 ASSERT(spa->spa_sync_on); | |
| 789 | 2518 |
| 1544 | 2519 mutex_enter(&spa->spa_async_lock); |
| 2520 tasks = spa->spa_async_tasks; | |
| 2521 spa->spa_async_tasks = 0; | |
| 2522 mutex_exit(&spa->spa_async_lock); | |
| 2523 | |
| 2524 /* | |
|
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2525 * See if the config needs to be updated. |
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2526 */ |
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2527 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { |
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2528 mutex_enter(&spa_namespace_lock); |
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2529 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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2530 mutex_exit(&spa_namespace_lock); |
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2531 } |
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2532 |
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2533 /* |
| 1544 | 2534 * See if any devices need to be reopened. |
| 2535 */ | |
| 2536 if (tasks & SPA_ASYNC_REOPEN) | |
| 2537 spa_async_reopen(spa); | |
| 2538 | |
| 2539 /* | |
| 2540 * If any devices are done replacing, detach them. | |
| 2541 */ | |
| 2542 if (tasks & SPA_ASYNC_REPLACE_DONE) | |
| 789 | 2543 spa_vdev_replace_done(spa); |
| 2544 | |
| 1544 | 2545 /* |
| 2546 * Kick off a scrub. | |
| 2547 */ | |
| 2548 if (tasks & SPA_ASYNC_SCRUB) | |
| 2549 VERIFY(spa_scrub(spa, POOL_SCRUB_EVERYTHING, B_TRUE) == 0); | |
| 2550 | |
| 2551 /* | |
| 2552 * Kick off a resilver. | |
| 2553 */ | |
| 2554 if (tasks & SPA_ASYNC_RESILVER) | |
| 2555 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 2556 | |
| 2557 /* | |
| 2558 * Let the world know that we're done. | |
| 2559 */ | |
| 2560 mutex_enter(&spa->spa_async_lock); | |
| 2561 spa->spa_async_thread = NULL; | |
| 2562 cv_broadcast(&spa->spa_async_cv); | |
| 2563 mutex_exit(&spa->spa_async_lock); | |
| 2564 thread_exit(); | |
| 2565 } | |
| 2566 | |
| 2567 void | |
| 2568 spa_async_suspend(spa_t *spa) | |
| 2569 { | |
| 2570 mutex_enter(&spa->spa_async_lock); | |
| 2571 spa->spa_async_suspended++; | |
| 2572 while (spa->spa_async_thread != NULL) | |
| 2573 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); | |
| 2574 mutex_exit(&spa->spa_async_lock); | |
| 2575 } | |
| 2576 | |
| 2577 void | |
| 2578 spa_async_resume(spa_t *spa) | |
| 2579 { | |
| 2580 mutex_enter(&spa->spa_async_lock); | |
| 2581 ASSERT(spa->spa_async_suspended != 0); | |
| 2582 spa->spa_async_suspended--; | |
| 2583 mutex_exit(&spa->spa_async_lock); | |
| 2584 } | |
| 2585 | |
| 2586 static void | |
| 2587 spa_async_dispatch(spa_t *spa) | |
| 2588 { | |
| 2589 mutex_enter(&spa->spa_async_lock); | |
| 2590 if (spa->spa_async_tasks && !spa->spa_async_suspended && | |
|
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2591 spa->spa_async_thread == NULL && |
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2592 rootdir != NULL && !vn_is_readonly(rootdir)) |
| 1544 | 2593 spa->spa_async_thread = thread_create(NULL, 0, |
| 2594 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); | |
| 2595 mutex_exit(&spa->spa_async_lock); | |
| 2596 } | |
| 2597 | |
| 2598 void | |
| 2599 spa_async_request(spa_t *spa, int task) | |
| 2600 { | |
| 2601 mutex_enter(&spa->spa_async_lock); | |
| 2602 spa->spa_async_tasks |= task; | |
| 2603 mutex_exit(&spa->spa_async_lock); | |
| 789 | 2604 } |
| 2605 | |
| 2606 /* | |
| 2607 * ========================================================================== | |
| 2608 * SPA syncing routines | |
| 2609 * ========================================================================== | |
| 2610 */ | |
| 2611 | |
| 2612 static void | |
| 2613 spa_sync_deferred_frees(spa_t *spa, uint64_t txg) | |
| 2614 { | |
| 2615 bplist_t *bpl = &spa->spa_sync_bplist; | |
| 2616 dmu_tx_t *tx; | |
| 2617 blkptr_t blk; | |
| 2618 uint64_t itor = 0; | |
| 2619 zio_t *zio; | |
| 2620 int error; | |
| 2621 uint8_t c = 1; | |
| 2622 | |
| 2623 zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CONFIG_HELD); | |
| 2624 | |
| 2625 while (bplist_iterate(bpl, &itor, &blk) == 0) | |
| 2626 zio_nowait(zio_free(zio, spa, txg, &blk, NULL, NULL)); | |
| 2627 | |
| 2628 error = zio_wait(zio); | |
| 2629 ASSERT3U(error, ==, 0); | |
| 2630 | |
| 2631 tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
| 2632 bplist_vacate(bpl, tx); | |
| 2633 | |
| 2634 /* | |
| 2635 * Pre-dirty the first block so we sync to convergence faster. | |
| 2636 * (Usually only the first block is needed.) | |
| 2637 */ | |
| 2638 dmu_write(spa->spa_meta_objset, spa->spa_sync_bplist_obj, 0, 1, &c, tx); | |
| 2639 dmu_tx_commit(tx); | |
| 2640 } | |
| 2641 | |
| 2642 static void | |
| 2082 | 2643 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) |
| 2644 { | |
| 2645 char *packed = NULL; | |
| 2646 size_t nvsize = 0; | |
| 2647 dmu_buf_t *db; | |
| 2648 | |
| 2649 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); | |
| 2650 | |
| 2651 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 2652 | |
| 2653 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, | |
| 2654 KM_SLEEP) == 0); | |
| 2655 | |
| 2656 dmu_write(spa->spa_meta_objset, obj, 0, nvsize, packed, tx); | |
| 2657 | |
| 2658 kmem_free(packed, nvsize); | |
| 2659 | |
| 2660 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 2661 dmu_buf_will_dirty(db, tx); | |
| 2662 *(uint64_t *)db->db_data = nvsize; | |
| 2663 dmu_buf_rele(db, FTAG); | |
| 2664 } | |
| 2665 | |
| 2666 static void | |
| 2667 spa_sync_spares(spa_t *spa, dmu_tx_t *tx) | |
| 2668 { | |
| 2669 nvlist_t *nvroot; | |
| 2670 nvlist_t **spares; | |
| 2671 int i; | |
| 2672 | |
| 2673 if (!spa->spa_sync_spares) | |
| 2674 return; | |
| 2675 | |
| 2676 /* | |
| 2677 * Update the MOS nvlist describing the list of available spares. | |
| 2678 * spa_validate_spares() will have already made sure this nvlist is | |
| 2679 * valid and the vdevs are labelled appropriately. | |
| 2680 */ | |
| 2681 if (spa->spa_spares_object == 0) { | |
| 2682 spa->spa_spares_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 2683 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 2684 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 2685 VERIFY(zap_update(spa->spa_meta_objset, | |
| 2686 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SPARES, | |
| 2687 sizeof (uint64_t), 1, &spa->spa_spares_object, tx) == 0); | |
| 2688 } | |
| 2689 | |
| 2690 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 2691 if (spa->spa_nspares == 0) { | |
| 2692 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2693 NULL, 0) == 0); | |
| 2694 } else { | |
| 2695 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), | |
| 2696 KM_SLEEP); | |
| 2697 for (i = 0; i < spa->spa_nspares; i++) | |
| 2698 spares[i] = vdev_config_generate(spa, | |
| 2699 spa->spa_spares[i], B_FALSE, B_TRUE); | |
| 2700 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2701 spares, spa->spa_nspares) == 0); | |
| 2702 for (i = 0; i < spa->spa_nspares; i++) | |
| 2703 nvlist_free(spares[i]); | |
| 2704 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 2705 } | |
| 2706 | |
| 2707 spa_sync_nvlist(spa, spa->spa_spares_object, nvroot, tx); | |
| 2708 | |
| 2709 spa->spa_sync_spares = B_FALSE; | |
| 2710 } | |
| 2711 | |
| 2712 static void | |
| 789 | 2713 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) |
| 2714 { | |
| 2715 nvlist_t *config; | |
| 2716 | |
| 2717 if (list_is_empty(&spa->spa_dirty_list)) | |
| 2718 return; | |
| 2719 | |
| 2720 config = spa_config_generate(spa, NULL, dmu_tx_get_txg(tx), B_FALSE); | |
| 2721 | |
|
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2722 if (spa->spa_config_syncing) |
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2723 nvlist_free(spa->spa_config_syncing); |
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2724 spa->spa_config_syncing = config; |
| 789 | 2725 |
| 2082 | 2726 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); |
| 789 | 2727 } |
| 2728 | |
| 2729 /* | |
| 2730 * Sync the specified transaction group. New blocks may be dirtied as | |
| 2731 * part of the process, so we iterate until it converges. | |
| 2732 */ | |
| 2733 void | |
| 2734 spa_sync(spa_t *spa, uint64_t txg) | |
| 2735 { | |
| 2736 dsl_pool_t *dp = spa->spa_dsl_pool; | |
| 2737 objset_t *mos = spa->spa_meta_objset; | |
| 2738 bplist_t *bpl = &spa->spa_sync_bplist; | |
|
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2739 vdev_t *rvd = spa->spa_root_vdev; |
| 789 | 2740 vdev_t *vd; |
| 2741 dmu_tx_t *tx; | |
| 2742 int dirty_vdevs; | |
| 2743 | |
| 2744 /* | |
| 2745 * Lock out configuration changes. | |
| 2746 */ | |
| 1544 | 2747 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2748 |
| 2749 spa->spa_syncing_txg = txg; | |
| 2750 spa->spa_sync_pass = 0; | |
| 2751 | |
| 1544 | 2752 VERIFY(0 == bplist_open(bpl, mos, spa->spa_sync_bplist_obj)); |
| 789 | 2753 |
| 2082 | 2754 tx = dmu_tx_create_assigned(dp, txg); |
| 2755 | |
| 2756 /* | |
| 2757 * If we are upgrading to ZFS_VERSION_RAIDZ_DEFLATE this txg, | |
| 2758 * set spa_deflate if we have no raid-z vdevs. | |
| 2759 */ | |
| 2760 if (spa->spa_ubsync.ub_version < ZFS_VERSION_RAIDZ_DEFLATE && | |
| 2761 spa->spa_uberblock.ub_version >= ZFS_VERSION_RAIDZ_DEFLATE) { | |
| 2762 int i; | |
| 2763 | |
| 2764 for (i = 0; i < rvd->vdev_children; i++) { | |
| 2765 vd = rvd->vdev_child[i]; | |
| 2766 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) | |
| 2767 break; | |
| 2768 } | |
| 2769 if (i == rvd->vdev_children) { | |
| 2770 spa->spa_deflate = TRUE; | |
| 2771 VERIFY(0 == zap_add(spa->spa_meta_objset, | |
| 2772 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 2773 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); | |
| 2774 } | |
| 2775 } | |
| 2776 | |
| 789 | 2777 /* |
| 2778 * If anything has changed in this txg, push the deferred frees | |
| 2779 * from the previous txg. If not, leave them alone so that we | |
| 2780 * don't generate work on an otherwise idle system. | |
| 2781 */ | |
| 2782 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || | |
| 2783 !txg_list_empty(&dp->dp_dirty_dirs, txg)) | |
| 2784 spa_sync_deferred_frees(spa, txg); | |
| 2785 | |
| 2786 /* | |
| 2787 * Iterate to convergence. | |
| 2788 */ | |
| 2789 do { | |
| 2790 spa->spa_sync_pass++; | |
| 2791 | |
| 2792 spa_sync_config_object(spa, tx); | |
| 2082 | 2793 spa_sync_spares(spa, tx); |
| 1544 | 2794 spa_errlog_sync(spa, txg); |
| 789 | 2795 dsl_pool_sync(dp, txg); |
| 2796 | |
| 2797 dirty_vdevs = 0; | |
| 2798 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) { | |
| 2799 vdev_sync(vd, txg); | |
| 2800 dirty_vdevs++; | |
| 2801 } | |
| 2802 | |
| 2803 bplist_sync(bpl, tx); | |
| 2804 } while (dirty_vdevs); | |
| 2805 | |
| 2806 bplist_close(bpl); | |
| 2807 | |
| 2808 dprintf("txg %llu passes %d\n", txg, spa->spa_sync_pass); | |
| 2809 | |
| 2810 /* | |
| 2811 * Rewrite the vdev configuration (which includes the uberblock) | |
| 2812 * to commit the transaction group. | |
|
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2813 * |
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2814 * If there are any dirty vdevs, sync the uberblock to all vdevs. |
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2815 * Otherwise, pick a random top-level vdev that's known to be |
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2816 * visible in the config cache (see spa_vdev_add() for details). |
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2817 * If the write fails, try the next vdev until we're tried them all. |
| 789 | 2818 */ |
|
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2819 if (!list_is_empty(&spa->spa_dirty_list)) { |
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2820 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2821 } else { |
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2822 int children = rvd->vdev_children; |
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2823 int c0 = spa_get_random(children); |
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2824 int c; |
|
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2825 |
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2826 for (c = 0; c < children; c++) { |
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2827 vd = rvd->vdev_child[(c0 + c) % children]; |
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2828 if (vd->vdev_ms_array == 0) |
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2829 continue; |
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2830 if (vdev_config_sync(vd, txg) == 0) |
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2831 break; |
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2832 } |
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2833 if (c == children) |
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2834 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2835 } |
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2836 |
| 2082 | 2837 dmu_tx_commit(tx); |
| 2838 | |
|
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2839 /* |
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2840 * Clear the dirty config list. |
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2841 */ |
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2842 while ((vd = list_head(&spa->spa_dirty_list)) != NULL) |
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2843 vdev_config_clean(vd); |
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2844 |
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2845 /* |
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2846 * Now that the new config has synced transactionally, |
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2847 * let it become visible to the config cache. |
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2848 */ |
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2849 if (spa->spa_config_syncing != NULL) { |
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2850 spa_config_set(spa, spa->spa_config_syncing); |
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2851 spa->spa_config_txg = txg; |
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2852 spa->spa_config_syncing = NULL; |
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2853 } |
| 789 | 2854 |
| 2855 /* | |
| 2856 * Make a stable copy of the fully synced uberblock. | |
| 2857 * We use this as the root for pool traversals. | |
| 2858 */ | |
| 2859 spa->spa_traverse_wanted = 1; /* tells traverse_more() to stop */ | |
| 2860 | |
| 2861 spa_scrub_suspend(spa); /* stop scrubbing and finish I/Os */ | |
| 2862 | |
| 2863 rw_enter(&spa->spa_traverse_lock, RW_WRITER); | |
| 2864 spa->spa_traverse_wanted = 0; | |
| 2865 spa->spa_ubsync = spa->spa_uberblock; | |
| 2866 rw_exit(&spa->spa_traverse_lock); | |
| 2867 | |
| 2868 spa_scrub_resume(spa); /* resume scrub with new ubsync */ | |
| 2869 | |
| 2870 /* | |
| 2871 * Clean up the ZIL records for the synced txg. | |
| 2872 */ | |
| 2873 dsl_pool_zil_clean(dp); | |
| 2874 | |
| 2875 /* | |
| 2876 * Update usable space statistics. | |
| 2877 */ | |
| 2878 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) | |
| 2879 vdev_sync_done(vd, txg); | |
| 2880 | |
| 2881 /* | |
| 2882 * It had better be the case that we didn't dirty anything | |
| 2082 | 2883 * since vdev_config_sync(). |
| 789 | 2884 */ |
| 2885 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); | |
| 2886 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); | |
| 2887 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); | |
| 2888 ASSERT(bpl->bpl_queue == NULL); | |
| 2889 | |
| 1544 | 2890 spa_config_exit(spa, FTAG); |
| 2891 | |
| 2892 /* | |
| 2893 * If any async tasks have been requested, kick them off. | |
| 2894 */ | |
| 2895 spa_async_dispatch(spa); | |
| 789 | 2896 } |
| 2897 | |
| 2898 /* | |
| 2899 * Sync all pools. We don't want to hold the namespace lock across these | |
| 2900 * operations, so we take a reference on the spa_t and drop the lock during the | |
| 2901 * sync. | |
| 2902 */ | |
| 2903 void | |
| 2904 spa_sync_allpools(void) | |
| 2905 { | |
| 2906 spa_t *spa = NULL; | |
| 2907 mutex_enter(&spa_namespace_lock); | |
| 2908 while ((spa = spa_next(spa)) != NULL) { | |
| 2909 if (spa_state(spa) != POOL_STATE_ACTIVE) | |
| 2910 continue; | |
| 2911 spa_open_ref(spa, FTAG); | |
| 2912 mutex_exit(&spa_namespace_lock); | |
| 2913 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 2914 mutex_enter(&spa_namespace_lock); | |
| 2915 spa_close(spa, FTAG); | |
| 2916 } | |
| 2917 mutex_exit(&spa_namespace_lock); | |
| 2918 } | |
| 2919 | |
| 2920 /* | |
| 2921 * ========================================================================== | |
| 2922 * Miscellaneous routines | |
| 2923 * ========================================================================== | |
| 2924 */ | |
| 2925 | |
| 2926 /* | |
| 2927 * Remove all pools in the system. | |
| 2928 */ | |
| 2929 void | |
| 2930 spa_evict_all(void) | |
| 2931 { | |
| 2932 spa_t *spa; | |
| 2933 | |
| 2934 /* | |
| 2935 * Remove all cached state. All pools should be closed now, | |
| 2936 * so every spa in the AVL tree should be unreferenced. | |
| 2937 */ | |
| 2938 mutex_enter(&spa_namespace_lock); | |
| 2939 while ((spa = spa_next(NULL)) != NULL) { | |
| 2940 /* | |
| 1544 | 2941 * Stop async tasks. The async thread may need to detach |
| 2942 * a device that's been replaced, which requires grabbing | |
| 2943 * spa_namespace_lock, so we must drop it here. | |
| 789 | 2944 */ |
| 2945 spa_open_ref(spa, FTAG); | |
| 2946 mutex_exit(&spa_namespace_lock); | |
| 1544 | 2947 spa_async_suspend(spa); |
| 789 | 2948 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); |
| 2949 mutex_enter(&spa_namespace_lock); | |
| 2950 spa_close(spa, FTAG); | |
| 2951 | |
| 2952 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 2953 spa_unload(spa); | |
| 2954 spa_deactivate(spa); | |
| 2955 } | |
| 2956 spa_remove(spa); | |
| 2957 } | |
| 2958 mutex_exit(&spa_namespace_lock); | |
| 2959 } | |
| 1544 | 2960 |
| 2961 vdev_t * | |
| 2962 spa_lookup_by_guid(spa_t *spa, uint64_t guid) | |
| 2963 { | |
| 2964 return (vdev_lookup_by_guid(spa->spa_root_vdev, guid)); | |
| 2965 } | |
| 1760 | 2966 |
| 2967 void | |
| 2968 spa_upgrade(spa_t *spa) | |
| 2969 { | |
| 2970 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2971 | |
| 2972 /* | |
| 2973 * This should only be called for a non-faulted pool, and since a | |
| 2974 * future version would result in an unopenable pool, this shouldn't be | |
| 2975 * possible. | |
| 2976 */ | |
| 2977 ASSERT(spa->spa_uberblock.ub_version <= ZFS_VERSION); | |
| 2978 | |
| 2979 spa->spa_uberblock.ub_version = ZFS_VERSION; | |
| 2980 vdev_config_dirty(spa->spa_root_vdev); | |
| 2981 | |
| 2982 spa_config_exit(spa, FTAG); | |
| 2082 | 2983 |
| 2984 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 1760 | 2985 } |
| 2082 | 2986 |
| 2987 boolean_t | |
| 2988 spa_has_spare(spa_t *spa, uint64_t guid) | |
| 2989 { | |
| 2990 int i; | |
| 2991 | |
| 2992 for (i = 0; i < spa->spa_nspares; i++) | |
| 2993 if (spa->spa_spares[i]->vdev_guid == guid) | |
| 2994 return (B_TRUE); | |
| 2995 | |
| 2996 return (B_FALSE); | |
| 2997 } |