Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/spa.c @ 2856:6f4d5ee1906a
6463348 ZFS code could be more portable
| author | nd150628 |
|---|---|
| date | Tue, 03 Oct 2006 15:01:10 -0700 |
| parents | 694d5de97348 |
| children | acfcfefbc60d |
| 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 | |
| 2856 | 127 mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL); |
| 128 mutex_init(&spa->spa_config_cache_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 129 mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 130 mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 131 mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 132 mutex_init(&spa->spa_config_lock.scl_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 133 mutex_init(&spa->spa_sync_bplist.bpl_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 134 | |
| 789 | 135 list_create(&spa->spa_dirty_list, sizeof (vdev_t), |
| 136 offsetof(vdev_t, vdev_dirty_node)); | |
| 137 | |
| 138 txg_list_create(&spa->spa_vdev_txg_list, | |
| 139 offsetof(struct vdev, vdev_txg_node)); | |
| 1544 | 140 |
| 141 avl_create(&spa->spa_errlist_scrub, | |
| 142 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 143 offsetof(spa_error_entry_t, se_avl)); | |
| 144 avl_create(&spa->spa_errlist_last, | |
| 145 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 146 offsetof(spa_error_entry_t, se_avl)); | |
| 789 | 147 } |
| 148 | |
| 149 /* | |
| 150 * Opposite of spa_activate(). | |
| 151 */ | |
| 152 static void | |
| 153 spa_deactivate(spa_t *spa) | |
| 154 { | |
| 155 int t; | |
| 156 | |
| 157 ASSERT(spa->spa_sync_on == B_FALSE); | |
| 158 ASSERT(spa->spa_dsl_pool == NULL); | |
| 159 ASSERT(spa->spa_root_vdev == NULL); | |
| 160 | |
| 161 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); | |
| 162 | |
| 163 txg_list_destroy(&spa->spa_vdev_txg_list); | |
| 164 | |
| 165 list_destroy(&spa->spa_dirty_list); | |
| 166 | |
| 167 rw_destroy(&spa->spa_traverse_lock); | |
| 168 | |
| 169 for (t = 0; t < ZIO_TYPES; t++) { | |
| 170 taskq_destroy(spa->spa_zio_issue_taskq[t]); | |
| 171 taskq_destroy(spa->spa_zio_intr_taskq[t]); | |
| 172 spa->spa_zio_issue_taskq[t] = NULL; | |
| 173 spa->spa_zio_intr_taskq[t] = NULL; | |
| 174 } | |
| 175 | |
| 176 metaslab_class_destroy(spa->spa_normal_class); | |
| 177 spa->spa_normal_class = NULL; | |
| 178 | |
| 1544 | 179 /* |
| 180 * If this was part of an import or the open otherwise failed, we may | |
| 181 * still have errors left in the queues. Empty them just in case. | |
| 182 */ | |
| 183 spa_errlog_drain(spa); | |
| 184 | |
| 185 avl_destroy(&spa->spa_errlist_scrub); | |
| 186 avl_destroy(&spa->spa_errlist_last); | |
| 187 | |
| 789 | 188 spa->spa_state = POOL_STATE_UNINITIALIZED; |
| 189 } | |
| 190 | |
| 191 /* | |
| 192 * Verify a pool configuration, and construct the vdev tree appropriately. This | |
| 193 * will create all the necessary vdevs in the appropriate layout, with each vdev | |
| 194 * in the CLOSED state. This will prep the pool before open/creation/import. | |
| 195 * All vdev validation is done by the vdev_alloc() routine. | |
| 196 */ | |
| 2082 | 197 static int |
| 198 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, | |
| 199 uint_t id, int atype) | |
| 789 | 200 { |
| 201 nvlist_t **child; | |
| 202 uint_t c, children; | |
| 2082 | 203 int error; |
| 204 | |
| 205 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) | |
| 206 return (error); | |
| 207 | |
| 208 if ((*vdp)->vdev_ops->vdev_op_leaf) | |
| 209 return (0); | |
| 789 | 210 |
| 211 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
| 212 &child, &children) != 0) { | |
| 2082 | 213 vdev_free(*vdp); |
| 214 *vdp = NULL; | |
| 215 return (EINVAL); | |
| 789 | 216 } |
| 217 | |
| 218 for (c = 0; c < children; c++) { | |
| 2082 | 219 vdev_t *vd; |
| 220 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, | |
| 221 atype)) != 0) { | |
| 222 vdev_free(*vdp); | |
| 223 *vdp = NULL; | |
| 224 return (error); | |
| 789 | 225 } |
| 226 } | |
| 227 | |
| 2082 | 228 ASSERT(*vdp != NULL); |
| 229 | |
| 230 return (0); | |
| 789 | 231 } |
| 232 | |
| 233 /* | |
| 234 * Opposite of spa_load(). | |
| 235 */ | |
| 236 static void | |
| 237 spa_unload(spa_t *spa) | |
| 238 { | |
| 2082 | 239 int i; |
| 240 | |
| 789 | 241 /* |
| 1544 | 242 * Stop async tasks. |
| 243 */ | |
| 244 spa_async_suspend(spa); | |
| 245 | |
| 246 /* | |
| 789 | 247 * Stop syncing. |
| 248 */ | |
| 249 if (spa->spa_sync_on) { | |
| 250 txg_sync_stop(spa->spa_dsl_pool); | |
| 251 spa->spa_sync_on = B_FALSE; | |
| 252 } | |
| 253 | |
| 254 /* | |
| 255 * Wait for any outstanding prefetch I/O to complete. | |
| 256 */ | |
| 1544 | 257 spa_config_enter(spa, RW_WRITER, FTAG); |
| 258 spa_config_exit(spa, FTAG); | |
| 789 | 259 |
| 260 /* | |
| 261 * Close the dsl pool. | |
| 262 */ | |
| 263 if (spa->spa_dsl_pool) { | |
| 264 dsl_pool_close(spa->spa_dsl_pool); | |
| 265 spa->spa_dsl_pool = NULL; | |
| 266 } | |
| 267 | |
| 268 /* | |
| 269 * Close all vdevs. | |
| 270 */ | |
|
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271 if (spa->spa_root_vdev) |
| 789 | 272 vdev_free(spa->spa_root_vdev); |
|
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273 ASSERT(spa->spa_root_vdev == NULL); |
| 1544 | 274 |
| 2082 | 275 for (i = 0; i < spa->spa_nspares; i++) |
| 276 vdev_free(spa->spa_spares[i]); | |
| 277 if (spa->spa_spares) { | |
| 278 kmem_free(spa->spa_spares, spa->spa_nspares * sizeof (void *)); | |
| 279 spa->spa_spares = NULL; | |
| 280 } | |
| 281 if (spa->spa_sparelist) { | |
| 282 nvlist_free(spa->spa_sparelist); | |
| 283 spa->spa_sparelist = NULL; | |
| 284 } | |
| 285 | |
| 1544 | 286 spa->spa_async_suspended = 0; |
| 789 | 287 } |
| 288 | |
| 289 /* | |
| 2082 | 290 * Load (or re-load) the current list of vdevs describing the active spares for |
| 291 * this pool. When this is called, we have some form of basic information in | |
| 292 * 'spa_sparelist'. We parse this into vdevs, try to open them, and then | |
| 293 * re-generate a more complete list including status information. | |
| 294 */ | |
| 295 static void | |
| 296 spa_load_spares(spa_t *spa) | |
| 297 { | |
| 298 nvlist_t **spares; | |
| 299 uint_t nspares; | |
| 300 int i; | |
| 301 | |
| 302 /* | |
| 303 * First, close and free any existing spare vdevs. | |
| 304 */ | |
| 305 for (i = 0; i < spa->spa_nspares; i++) { | |
| 306 vdev_close(spa->spa_spares[i]); | |
| 307 vdev_free(spa->spa_spares[i]); | |
| 308 } | |
| 309 if (spa->spa_spares) | |
| 310 kmem_free(spa->spa_spares, spa->spa_nspares * sizeof (void *)); | |
| 311 | |
| 312 if (spa->spa_sparelist == NULL) | |
| 313 nspares = 0; | |
| 314 else | |
| 315 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 316 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 317 | |
| 318 spa->spa_nspares = (int)nspares; | |
| 319 spa->spa_spares = NULL; | |
| 320 | |
| 321 if (nspares == 0) | |
| 322 return; | |
| 323 | |
| 324 /* | |
| 325 * Construct the array of vdevs, opening them to get status in the | |
| 326 * process. | |
| 327 */ | |
| 328 spa->spa_spares = kmem_alloc(nspares * sizeof (void *), KM_SLEEP); | |
| 329 for (i = 0; i < spa->spa_nspares; i++) { | |
| 330 vdev_t *vd; | |
| 331 | |
| 332 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 333 VDEV_ALLOC_SPARE) == 0); | |
| 334 ASSERT(vd != NULL); | |
| 335 | |
| 336 spa->spa_spares[i] = vd; | |
| 337 | |
| 338 if (vdev_open(vd) != 0) | |
| 339 continue; | |
| 340 | |
| 341 vd->vdev_top = vd; | |
| 342 (void) vdev_validate_spare(vd); | |
| 343 } | |
| 344 | |
| 345 /* | |
| 346 * Recompute the stashed list of spares, with status information | |
| 347 * this time. | |
| 348 */ | |
| 349 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 350 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 351 | |
| 352 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), KM_SLEEP); | |
| 353 for (i = 0; i < spa->spa_nspares; i++) | |
| 354 spares[i] = vdev_config_generate(spa, spa->spa_spares[i], | |
| 355 B_TRUE, B_TRUE); | |
| 356 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 357 spares, spa->spa_nspares) == 0); | |
| 358 for (i = 0; i < spa->spa_nspares; i++) | |
| 359 nvlist_free(spares[i]); | |
| 360 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 361 } | |
| 362 | |
| 363 static int | |
| 364 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) | |
| 365 { | |
| 366 dmu_buf_t *db; | |
| 367 char *packed = NULL; | |
| 368 size_t nvsize = 0; | |
| 369 int error; | |
| 370 *value = NULL; | |
| 371 | |
| 372 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 373 nvsize = *(uint64_t *)db->db_data; | |
| 374 dmu_buf_rele(db, FTAG); | |
| 375 | |
| 376 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 377 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed); | |
| 378 if (error == 0) | |
| 379 error = nvlist_unpack(packed, nvsize, value, 0); | |
| 380 kmem_free(packed, nvsize); | |
| 381 | |
| 382 return (error); | |
| 383 } | |
| 384 | |
| 385 /* | |
| 789 | 386 * Load an existing storage pool, using the pool's builtin spa_config as a |
| 1544 | 387 * source of configuration information. |
| 789 | 388 */ |
| 389 static int | |
| 1544 | 390 spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) |
| 789 | 391 { |
| 392 int error = 0; | |
| 393 nvlist_t *nvroot = NULL; | |
| 394 vdev_t *rvd; | |
| 395 uberblock_t *ub = &spa->spa_uberblock; | |
|
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396 uint64_t config_cache_txg = spa->spa_config_txg; |
| 789 | 397 uint64_t pool_guid; |
| 2082 | 398 uint64_t version; |
| 789 | 399 zio_t *zio; |
| 400 | |
| 1544 | 401 spa->spa_load_state = state; |
|
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402 |
| 789 | 403 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || |
| 1733 | 404 nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) { |
| 1544 | 405 error = EINVAL; |
| 406 goto out; | |
| 407 } | |
| 789 | 408 |
| 2082 | 409 /* |
| 410 * Versioning wasn't explicitly added to the label until later, so if | |
| 411 * it's not present treat it as the initial version. | |
| 412 */ | |
| 413 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, &version) != 0) | |
| 414 version = ZFS_VERSION_INITIAL; | |
| 415 | |
| 1733 | 416 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, |
| 417 &spa->spa_config_txg); | |
| 418 | |
|
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419 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && |
| 1544 | 420 spa_guid_exists(pool_guid, 0)) { |
| 421 error = EEXIST; | |
| 422 goto out; | |
| 423 } | |
| 789 | 424 |
|
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425 spa->spa_load_guid = pool_guid; |
|
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426 |
| 789 | 427 /* |
| 2082 | 428 * Parse the configuration into a vdev tree. We explicitly set the |
| 429 * value that will be returned by spa_version() since parsing the | |
| 430 * configuration requires knowing the version number. | |
| 789 | 431 */ |
| 1544 | 432 spa_config_enter(spa, RW_WRITER, FTAG); |
| 2082 | 433 spa->spa_ubsync.ub_version = version; |
| 434 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_LOAD); | |
| 1544 | 435 spa_config_exit(spa, FTAG); |
| 789 | 436 |
| 2082 | 437 if (error != 0) |
| 1544 | 438 goto out; |
| 789 | 439 |
|
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diff
changeset
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440 ASSERT(spa->spa_root_vdev == rvd); |
| 789 | 441 ASSERT(spa_guid(spa) == pool_guid); |
| 442 | |
| 443 /* | |
| 444 * Try to open all vdevs, loading each label in the process. | |
| 445 */ | |
| 1544 | 446 if (vdev_open(rvd) != 0) { |
| 447 error = ENXIO; | |
| 448 goto out; | |
| 449 } | |
| 789 | 450 |
| 451 /* | |
|
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6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
parents:
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diff
changeset
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452 * Validate the labels for all leaf vdevs. We need to grab the config |
|
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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parents:
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diff
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453 * 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
eschrock
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454 * flag. |
|
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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455 */ |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
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1807
diff
changeset
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456 spa_config_enter(spa, RW_READER, FTAG); |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
parents:
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diff
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457 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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diff
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458 spa_config_exit(spa, FTAG); |
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628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
parents:
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diff
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459 |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
eschrock
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1807
diff
changeset
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460 if (error != 0) { |
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628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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461 error = EBADF; |
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462 goto out; |
|
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463 } |
|
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464 |
|
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465 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
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466 error = ENXIO; |
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467 goto out; |
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468 } |
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469 |
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470 /* |
| 789 | 471 * Find the best uberblock. |
| 472 */ | |
| 473 bzero(ub, sizeof (uberblock_t)); | |
| 474 | |
| 475 zio = zio_root(spa, NULL, NULL, | |
| 476 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); | |
| 477 vdev_uberblock_load(zio, rvd, ub); | |
| 478 error = zio_wait(zio); | |
| 479 | |
| 480 /* | |
| 481 * If we weren't able to find a single valid uberblock, return failure. | |
| 482 */ | |
| 483 if (ub->ub_txg == 0) { | |
| 1760 | 484 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 485 VDEV_AUX_CORRUPT_DATA); | |
| 1544 | 486 error = ENXIO; |
| 487 goto out; | |
| 488 } | |
| 489 | |
| 490 /* | |
| 491 * If the pool is newer than the code, we can't open it. | |
| 492 */ | |
| 1760 | 493 if (ub->ub_version > ZFS_VERSION) { |
| 494 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 495 VDEV_AUX_VERSION_NEWER); | |
| 1544 | 496 error = ENOTSUP; |
| 497 goto out; | |
| 789 | 498 } |
| 499 | |
| 500 /* | |
| 501 * If the vdev guid sum doesn't match the uberblock, we have an | |
| 502 * incomplete configuration. | |
| 503 */ | |
| 1732 | 504 if (rvd->vdev_guid_sum != ub->ub_guid_sum && mosconfig) { |
| 1544 | 505 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 506 VDEV_AUX_BAD_GUID_SUM); | |
| 507 error = ENXIO; | |
| 508 goto out; | |
| 789 | 509 } |
| 510 | |
| 511 /* | |
| 512 * Initialize internal SPA structures. | |
| 513 */ | |
| 514 spa->spa_state = POOL_STATE_ACTIVE; | |
| 515 spa->spa_ubsync = spa->spa_uberblock; | |
| 516 spa->spa_first_txg = spa_last_synced_txg(spa) + 1; | |
| 1544 | 517 error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool); |
| 518 if (error) { | |
| 519 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 520 VDEV_AUX_CORRUPT_DATA); | |
| 521 goto out; | |
| 522 } | |
| 789 | 523 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; |
| 524 | |
| 1544 | 525 if (zap_lookup(spa->spa_meta_objset, |
| 789 | 526 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 527 sizeof (uint64_t), 1, &spa->spa_config_object) != 0) { |
| 528 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 529 VDEV_AUX_CORRUPT_DATA); | |
| 530 error = EIO; | |
| 531 goto out; | |
| 532 } | |
| 789 | 533 |
| 534 if (!mosconfig) { | |
| 2082 | 535 nvlist_t *newconfig; |
| 536 | |
| 537 if (load_nvlist(spa, spa->spa_config_object, &newconfig) != 0) { | |
| 1544 | 538 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 539 VDEV_AUX_CORRUPT_DATA); | |
| 540 error = EIO; | |
| 541 goto out; | |
| 542 } | |
| 789 | 543 |
| 544 spa_config_set(spa, newconfig); | |
| 545 spa_unload(spa); | |
| 546 spa_deactivate(spa); | |
| 547 spa_activate(spa); | |
| 548 | |
| 1544 | 549 return (spa_load(spa, newconfig, state, B_TRUE)); |
| 550 } | |
| 551 | |
| 552 if (zap_lookup(spa->spa_meta_objset, | |
| 553 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, | |
| 554 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj) != 0) { | |
| 555 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 556 VDEV_AUX_CORRUPT_DATA); | |
| 557 error = EIO; | |
| 558 goto out; | |
| 789 | 559 } |
| 560 | |
| 1544 | 561 /* |
| 2082 | 562 * Load the bit that tells us to use the new accounting function |
| 563 * (raid-z deflation). If we have an older pool, this will not | |
| 564 * be present. | |
| 565 */ | |
| 566 error = zap_lookup(spa->spa_meta_objset, | |
| 567 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 568 sizeof (uint64_t), 1, &spa->spa_deflate); | |
| 569 if (error != 0 && error != ENOENT) { | |
| 570 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 571 VDEV_AUX_CORRUPT_DATA); | |
| 572 error = EIO; | |
| 573 goto out; | |
| 574 } | |
| 575 | |
| 576 /* | |
| 1544 | 577 * Load the persistent error log. If we have an older pool, this will |
| 578 * not be present. | |
| 579 */ | |
| 580 error = zap_lookup(spa->spa_meta_objset, | |
| 581 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_LAST, | |
| 582 sizeof (uint64_t), 1, &spa->spa_errlog_last); | |
|
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583 if (error != 0 && error != ENOENT) { |
| 1544 | 584 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 585 VDEV_AUX_CORRUPT_DATA); | |
| 586 error = EIO; | |
| 587 goto out; | |
| 588 } | |
| 589 | |
| 590 error = zap_lookup(spa->spa_meta_objset, | |
| 591 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_SCRUB, | |
| 592 sizeof (uint64_t), 1, &spa->spa_errlog_scrub); | |
| 593 if (error != 0 && error != ENOENT) { | |
| 594 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 595 VDEV_AUX_CORRUPT_DATA); | |
| 596 error = EIO; | |
| 597 goto out; | |
| 598 } | |
| 789 | 599 |
| 600 /* | |
| 2082 | 601 * Load any hot spares for this pool. |
| 602 */ | |
| 603 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, | |
| 604 DMU_POOL_SPARES, sizeof (uint64_t), 1, &spa->spa_spares_object); | |
| 605 if (error != 0 && error != ENOENT) { | |
| 606 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 607 VDEV_AUX_CORRUPT_DATA); | |
| 608 error = EIO; | |
| 609 goto out; | |
| 610 } | |
| 611 if (error == 0) { | |
| 612 ASSERT(spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 613 if (load_nvlist(spa, spa->spa_spares_object, | |
| 614 &spa->spa_sparelist) != 0) { | |
| 615 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 616 VDEV_AUX_CORRUPT_DATA); | |
| 617 error = EIO; | |
| 618 goto out; | |
| 619 } | |
| 620 | |
| 621 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 622 spa_load_spares(spa); | |
| 623 spa_config_exit(spa, FTAG); | |
| 624 } | |
| 625 | |
| 626 /* | |
|
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627 * Load the vdev state for all toplevel vdevs. |
| 789 | 628 */ |
|
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629 vdev_load(rvd); |
| 789 | 630 |
| 631 /* | |
| 632 * Propagate the leaf DTLs we just loaded all the way up the tree. | |
| 633 */ | |
| 1544 | 634 spa_config_enter(spa, RW_WRITER, FTAG); |
| 789 | 635 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); |
| 1544 | 636 spa_config_exit(spa, FTAG); |
| 789 | 637 |
| 638 /* | |
| 639 * Check the state of the root vdev. If it can't be opened, it | |
| 640 * indicates one or more toplevel vdevs are faulted. | |
| 641 */ | |
| 1544 | 642 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
| 643 error = ENXIO; | |
| 644 goto out; | |
| 645 } | |
| 789 | 646 |
| 1544 | 647 if ((spa_mode & FWRITE) && state != SPA_LOAD_TRYIMPORT) { |
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648 dmu_tx_t *tx; |
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649 int need_update = B_FALSE; |
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650 int c; |
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651 |
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652 /* |
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653 * Claim log blocks that haven't been committed yet. |
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654 * This must all happen in a single txg. |
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655 */ |
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656 tx = dmu_tx_create_assigned(spa_get_dsl(spa), |
| 789 | 657 spa_first_txg(spa)); |
| 2417 | 658 (void) dmu_objset_find(spa->spa_name, |
| 659 zil_claim, tx, DS_FIND_CHILDREN); | |
| 789 | 660 dmu_tx_commit(tx); |
| 661 | |
| 662 spa->spa_sync_on = B_TRUE; | |
| 663 txg_sync_start(spa->spa_dsl_pool); | |
| 664 | |
| 665 /* | |
| 666 * Wait for all claims to sync. | |
| 667 */ | |
| 668 txg_wait_synced(spa->spa_dsl_pool, 0); | |
|
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669 |
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670 /* |
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671 * If the config cache is stale, or we have uninitialized |
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672 * metaslabs (see spa_vdev_add()), then update the config. |
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673 */ |
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674 if (config_cache_txg != spa->spa_config_txg || |
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675 state == SPA_LOAD_IMPORT) |
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676 need_update = B_TRUE; |
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677 |
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678 for (c = 0; c < rvd->vdev_children; c++) |
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679 if (rvd->vdev_child[c]->vdev_ms_array == 0) |
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680 need_update = B_TRUE; |
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681 |
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682 /* |
|
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683 * Update the config cache asychronously in case we're the |
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684 * root pool, in which case the config cache isn't writable yet. |
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685 */ |
|
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686 if (need_update) |
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687 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); |
| 789 | 688 } |
| 689 | |
| 1544 | 690 error = 0; |
| 691 out: | |
| 2082 | 692 if (error && error != EBADF) |
| 1544 | 693 zfs_ereport_post(FM_EREPORT_ZFS_POOL, spa, NULL, NULL, 0, 0); |
| 694 spa->spa_load_state = SPA_LOAD_NONE; | |
| 695 spa->spa_ena = 0; | |
| 696 | |
| 697 return (error); | |
| 789 | 698 } |
| 699 | |
| 700 /* | |
| 701 * Pool Open/Import | |
| 702 * | |
| 703 * The import case is identical to an open except that the configuration is sent | |
| 704 * down from userland, instead of grabbed from the configuration cache. For the | |
| 705 * case of an open, the pool configuration will exist in the | |
| 706 * POOL_STATE_UNITIALIZED state. | |
| 707 * | |
| 708 * The stats information (gen/count/ustats) is used to gather vdev statistics at | |
| 709 * the same time open the pool, without having to keep around the spa_t in some | |
| 710 * ambiguous state. | |
| 711 */ | |
| 712 static int | |
| 713 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) | |
| 714 { | |
| 715 spa_t *spa; | |
| 716 int error; | |
| 717 int loaded = B_FALSE; | |
| 718 int locked = B_FALSE; | |
| 719 | |
| 720 *spapp = NULL; | |
| 721 | |
| 722 /* | |
| 723 * As disgusting as this is, we need to support recursive calls to this | |
| 724 * function because dsl_dir_open() is called during spa_load(), and ends | |
| 725 * up calling spa_open() again. The real fix is to figure out how to | |
| 726 * avoid dsl_dir_open() calling this in the first place. | |
| 727 */ | |
| 728 if (mutex_owner(&spa_namespace_lock) != curthread) { | |
| 729 mutex_enter(&spa_namespace_lock); | |
| 730 locked = B_TRUE; | |
| 731 } | |
| 732 | |
| 733 if ((spa = spa_lookup(pool)) == NULL) { | |
| 734 if (locked) | |
| 735 mutex_exit(&spa_namespace_lock); | |
| 736 return (ENOENT); | |
| 737 } | |
| 738 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { | |
| 739 | |
| 740 spa_activate(spa); | |
| 741 | |
|
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742 error = spa_load(spa, spa->spa_config, SPA_LOAD_OPEN, B_FALSE); |
| 789 | 743 |
| 744 if (error == EBADF) { | |
| 745 /* | |
|
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746 * If vdev_validate() returns failure (indicated by |
|
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747 * EBADF), it indicates that one of the vdevs indicates |
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748 * that the pool has been exported or destroyed. If |
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749 * this is the case, the config cache is out of sync and |
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750 * we should remove the pool from the namespace. |
| 789 | 751 */ |
| 2082 | 752 zfs_post_ok(spa, NULL); |
| 789 | 753 spa_unload(spa); |
| 754 spa_deactivate(spa); | |
| 755 spa_remove(spa); | |
| 756 spa_config_sync(); | |
| 757 if (locked) | |
| 758 mutex_exit(&spa_namespace_lock); | |
| 759 return (ENOENT); | |
| 1544 | 760 } |
| 761 | |
| 762 if (error) { | |
| 789 | 763 /* |
| 764 * We can't open the pool, but we still have useful | |
| 765 * information: the state of each vdev after the | |
| 766 * attempted vdev_open(). Return this to the user. | |
| 767 */ | |
|
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768 if (config != NULL && spa->spa_root_vdev != NULL) { |
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769 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 770 *config = spa_config_generate(spa, NULL, -1ULL, |
| 771 B_TRUE); | |
|
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772 spa_config_exit(spa, FTAG); |
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773 } |
| 789 | 774 spa_unload(spa); |
| 775 spa_deactivate(spa); | |
| 1544 | 776 spa->spa_last_open_failed = B_TRUE; |
| 789 | 777 if (locked) |
| 778 mutex_exit(&spa_namespace_lock); | |
| 779 *spapp = NULL; | |
| 780 return (error); | |
| 1544 | 781 } else { |
| 782 zfs_post_ok(spa, NULL); | |
| 783 spa->spa_last_open_failed = B_FALSE; | |
| 789 | 784 } |
| 785 | |
| 786 loaded = B_TRUE; | |
| 787 } | |
| 788 | |
| 789 spa_open_ref(spa, tag); | |
| 790 if (locked) | |
| 791 mutex_exit(&spa_namespace_lock); | |
| 792 | |
| 793 *spapp = spa; | |
| 794 | |
| 795 if (config != NULL) { | |
| 1544 | 796 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 797 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
| 1544 | 798 spa_config_exit(spa, FTAG); |
| 789 | 799 } |
| 800 | |
| 801 /* | |
| 802 * If we just loaded the pool, resilver anything that's out of date. | |
| 803 */ | |
| 804 if (loaded && (spa_mode & FWRITE)) | |
| 805 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 806 | |
| 807 return (0); | |
| 808 } | |
| 809 | |
| 810 int | |
| 811 spa_open(const char *name, spa_t **spapp, void *tag) | |
| 812 { | |
| 813 return (spa_open_common(name, spapp, tag, NULL)); | |
| 814 } | |
| 815 | |
| 1544 | 816 /* |
| 817 * Lookup the given spa_t, incrementing the inject count in the process, | |
| 818 * preventing it from being exported or destroyed. | |
| 819 */ | |
| 820 spa_t * | |
| 821 spa_inject_addref(char *name) | |
| 822 { | |
| 823 spa_t *spa; | |
| 824 | |
| 825 mutex_enter(&spa_namespace_lock); | |
| 826 if ((spa = spa_lookup(name)) == NULL) { | |
| 827 mutex_exit(&spa_namespace_lock); | |
| 828 return (NULL); | |
| 829 } | |
| 830 spa->spa_inject_ref++; | |
| 831 mutex_exit(&spa_namespace_lock); | |
| 832 | |
| 833 return (spa); | |
| 834 } | |
| 835 | |
| 836 void | |
| 837 spa_inject_delref(spa_t *spa) | |
| 838 { | |
| 839 mutex_enter(&spa_namespace_lock); | |
| 840 spa->spa_inject_ref--; | |
| 841 mutex_exit(&spa_namespace_lock); | |
| 842 } | |
| 843 | |
| 2082 | 844 static void |
| 845 spa_add_spares(spa_t *spa, nvlist_t *config) | |
| 846 { | |
| 847 nvlist_t **spares; | |
| 848 uint_t i, nspares; | |
| 849 nvlist_t *nvroot; | |
| 850 uint64_t guid; | |
| 851 vdev_stat_t *vs; | |
| 852 uint_t vsc; | |
| 853 | |
| 854 if (spa->spa_nspares == 0) | |
| 855 return; | |
| 856 | |
| 857 VERIFY(nvlist_lookup_nvlist(config, | |
| 858 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); | |
| 859 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 860 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 861 if (nspares != 0) { | |
| 862 VERIFY(nvlist_add_nvlist_array(nvroot, | |
| 863 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 864 VERIFY(nvlist_lookup_nvlist_array(nvroot, | |
| 865 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 866 | |
| 867 /* | |
| 868 * Go through and find any spares which have since been | |
| 869 * repurposed as an active spare. If this is the case, update | |
| 870 * their status appropriately. | |
| 871 */ | |
| 872 for (i = 0; i < nspares; i++) { | |
| 873 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 874 ZPOOL_CONFIG_GUID, &guid) == 0); | |
| 875 if (spa_spare_inuse(guid)) { | |
| 876 VERIFY(nvlist_lookup_uint64_array( | |
| 877 spares[i], ZPOOL_CONFIG_STATS, | |
| 878 (uint64_t **)&vs, &vsc) == 0); | |
| 879 vs->vs_state = VDEV_STATE_CANT_OPEN; | |
| 880 vs->vs_aux = VDEV_AUX_SPARED; | |
| 881 } | |
| 882 } | |
| 883 } | |
| 884 } | |
| 885 | |
| 789 | 886 int |
| 1544 | 887 spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) |
| 789 | 888 { |
| 889 int error; | |
| 890 spa_t *spa; | |
| 891 | |
| 892 *config = NULL; | |
| 893 error = spa_open_common(name, &spa, FTAG, config); | |
| 894 | |
| 2082 | 895 if (spa && *config != NULL) { |
| 1544 | 896 VERIFY(nvlist_add_uint64(*config, ZPOOL_CONFIG_ERRCOUNT, |
| 897 spa_get_errlog_size(spa)) == 0); | |
| 898 | |
| 2082 | 899 spa_add_spares(spa, *config); |
| 900 } | |
| 901 | |
| 1544 | 902 /* |
| 903 * We want to get the alternate root even for faulted pools, so we cheat | |
| 904 * and call spa_lookup() directly. | |
| 905 */ | |
| 906 if (altroot) { | |
| 907 if (spa == NULL) { | |
| 908 mutex_enter(&spa_namespace_lock); | |
| 909 spa = spa_lookup(name); | |
| 910 if (spa) | |
| 911 spa_altroot(spa, altroot, buflen); | |
| 912 else | |
| 913 altroot[0] = '\0'; | |
| 914 spa = NULL; | |
| 915 mutex_exit(&spa_namespace_lock); | |
| 916 } else { | |
| 917 spa_altroot(spa, altroot, buflen); | |
| 918 } | |
| 919 } | |
| 920 | |
| 789 | 921 if (spa != NULL) |
| 922 spa_close(spa, FTAG); | |
| 923 | |
| 924 return (error); | |
| 925 } | |
| 926 | |
| 927 /* | |
| 2082 | 928 * Validate that the 'spares' array is well formed. We must have an array of |
| 929 * nvlists, each which describes a valid leaf vdev. | |
| 930 */ | |
| 931 static int | |
| 932 spa_validate_spares(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) | |
| 933 { | |
| 934 nvlist_t **spares; | |
| 935 uint_t i, nspares; | |
| 936 vdev_t *vd; | |
| 937 int error; | |
| 938 | |
| 939 /* | |
| 940 * It's acceptable to have no spares specified. | |
| 941 */ | |
| 942 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 943 &spares, &nspares) != 0) | |
| 944 return (0); | |
| 945 | |
| 946 if (nspares == 0) | |
| 947 return (EINVAL); | |
| 948 | |
| 949 /* | |
| 950 * Make sure the pool is formatted with a version that supports hot | |
| 951 * spares. | |
| 952 */ | |
| 953 if (spa_version(spa) < ZFS_VERSION_SPARES) | |
| 954 return (ENOTSUP); | |
| 955 | |
| 956 for (i = 0; i < nspares; i++) { | |
| 957 if ((error = spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 958 mode)) != 0) | |
| 959 return (error); | |
| 960 | |
| 961 if (!vd->vdev_ops->vdev_op_leaf) { | |
| 962 vdev_free(vd); | |
| 963 return (EINVAL); | |
| 964 } | |
| 965 | |
| 966 if ((error = vdev_open(vd)) != 0) { | |
| 967 vdev_free(vd); | |
| 968 return (error); | |
| 969 } | |
| 970 | |
| 971 vd->vdev_top = vd; | |
| 972 if ((error = vdev_label_spare(vd, crtxg)) != 0) { | |
| 973 vdev_free(vd); | |
| 974 return (error); | |
| 975 } | |
| 976 | |
| 977 VERIFY(nvlist_add_uint64(spares[i], ZPOOL_CONFIG_GUID, | |
| 978 vd->vdev_guid) == 0); | |
| 979 | |
| 980 vdev_free(vd); | |
| 981 } | |
| 982 | |
| 983 return (0); | |
| 984 } | |
| 985 | |
| 986 /* | |
| 789 | 987 * Pool Creation |
| 988 */ | |
| 989 int | |
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990 spa_create(const char *pool, nvlist_t *nvroot, const char *altroot) |
| 789 | 991 { |
| 992 spa_t *spa; | |
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993 vdev_t *rvd; |
| 789 | 994 dsl_pool_t *dp; |
| 995 dmu_tx_t *tx; | |
| 2082 | 996 int c, error = 0; |
| 789 | 997 uint64_t txg = TXG_INITIAL; |
| 2082 | 998 nvlist_t **spares; |
| 999 uint_t nspares; | |
| 789 | 1000 |
| 1001 /* | |
| 1002 * If this pool already exists, return failure. | |
| 1003 */ | |
| 1004 mutex_enter(&spa_namespace_lock); | |
| 1005 if (spa_lookup(pool) != NULL) { | |
| 1006 mutex_exit(&spa_namespace_lock); | |
| 1007 return (EEXIST); | |
| 1008 } | |
| 1009 | |
| 1010 /* | |
| 1011 * Allocate a new spa_t structure. | |
| 1012 */ | |
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1013 spa = spa_add(pool, altroot); |
| 789 | 1014 spa_activate(spa); |
| 1015 | |
| 1016 spa->spa_uberblock.ub_txg = txg - 1; | |
| 1760 | 1017 spa->spa_uberblock.ub_version = ZFS_VERSION; |
| 789 | 1018 spa->spa_ubsync = spa->spa_uberblock; |
| 1019 | |
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1020 /* |
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1021 * Create the root vdev. |
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1022 */ |
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1023 spa_config_enter(spa, RW_WRITER, FTAG); |
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1024 |
| 2082 | 1025 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); |
| 1026 | |
| 1027 ASSERT(error != 0 || rvd != NULL); | |
| 1028 ASSERT(error != 0 || spa->spa_root_vdev == rvd); | |
| 1029 | |
| 1030 if (error == 0 && rvd->vdev_children == 0) | |
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1031 error = EINVAL; |
| 2082 | 1032 |
| 1033 if (error == 0 && | |
| 1034 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && | |
| 1035 (error = spa_validate_spares(spa, nvroot, txg, | |
| 1036 VDEV_ALLOC_ADD)) == 0) { | |
| 1037 for (c = 0; c < rvd->vdev_children; c++) | |
| 1038 vdev_init(rvd->vdev_child[c], txg); | |
| 1039 vdev_config_dirty(rvd); | |
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1040 } |
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1041 |
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1042 spa_config_exit(spa, FTAG); |
| 789 | 1043 |
| 2082 | 1044 if (error != 0) { |
| 789 | 1045 spa_unload(spa); |
| 1046 spa_deactivate(spa); | |
| 1047 spa_remove(spa); | |
| 1048 mutex_exit(&spa_namespace_lock); | |
| 1049 return (error); | |
| 1050 } | |
| 1051 | |
| 2082 | 1052 /* |
| 1053 * Get the list of spares, if specified. | |
| 1054 */ | |
| 1055 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1056 &spares, &nspares) == 0) { | |
| 1057 VERIFY(nvlist_alloc(&spa->spa_sparelist, NV_UNIQUE_NAME, | |
| 1058 KM_SLEEP) == 0); | |
| 1059 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1060 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1061 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1062 spa_load_spares(spa); | |
| 1063 spa_config_exit(spa, FTAG); | |
| 1064 spa->spa_sync_spares = B_TRUE; | |
| 1065 } | |
| 1066 | |
| 789 | 1067 spa->spa_dsl_pool = dp = dsl_pool_create(spa, txg); |
| 1068 spa->spa_meta_objset = dp->dp_meta_objset; | |
| 1069 | |
| 1070 tx = dmu_tx_create_assigned(dp, txg); | |
| 1071 | |
| 1072 /* | |
| 1073 * Create the pool config object. | |
| 1074 */ | |
| 1075 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 1076 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 1077 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 1078 | |
| 1544 | 1079 if (zap_add(spa->spa_meta_objset, |
| 789 | 1080 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 1081 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { |
| 1082 cmn_err(CE_PANIC, "failed to add pool config"); | |
| 1083 } | |
| 789 | 1084 |
| 2082 | 1085 /* Newly created pools are always deflated. */ |
| 1086 spa->spa_deflate = TRUE; | |
| 1087 if (zap_add(spa->spa_meta_objset, | |
| 1088 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 1089 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { | |
| 1090 cmn_err(CE_PANIC, "failed to add deflate"); | |
| 1091 } | |
| 1092 | |
| 789 | 1093 /* |
| 1094 * Create the deferred-free bplist object. Turn off compression | |
| 1095 * because sync-to-convergence takes longer if the blocksize | |
| 1096 * keeps changing. | |
| 1097 */ | |
| 1098 spa->spa_sync_bplist_obj = bplist_create(spa->spa_meta_objset, | |
| 1099 1 << 14, tx); | |
| 1100 dmu_object_set_compress(spa->spa_meta_objset, spa->spa_sync_bplist_obj, | |
| 1101 ZIO_COMPRESS_OFF, tx); | |
| 1102 | |
| 1544 | 1103 if (zap_add(spa->spa_meta_objset, |
| 789 | 1104 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, |
| 1544 | 1105 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj, tx) != 0) { |
| 1106 cmn_err(CE_PANIC, "failed to add bplist"); | |
| 1107 } | |
| 789 | 1108 |
| 1109 dmu_tx_commit(tx); | |
| 1110 | |
| 1111 spa->spa_sync_on = B_TRUE; | |
| 1112 txg_sync_start(spa->spa_dsl_pool); | |
| 1113 | |
| 1114 /* | |
| 1115 * We explicitly wait for the first transaction to complete so that our | |
| 1116 * bean counters are appropriately updated. | |
| 1117 */ | |
| 1118 txg_wait_synced(spa->spa_dsl_pool, txg); | |
| 1119 | |
| 1120 spa_config_sync(); | |
| 1121 | |
| 1122 mutex_exit(&spa_namespace_lock); | |
| 1123 | |
| 1124 return (0); | |
| 1125 } | |
| 1126 | |
| 1127 /* | |
| 1128 * Import the given pool into the system. We set up the necessary spa_t and | |
| 1129 * then call spa_load() to do the dirty work. | |
| 1130 */ | |
| 1131 int | |
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1132 spa_import(const char *pool, nvlist_t *config, const char *altroot) |
| 789 | 1133 { |
| 1134 spa_t *spa; | |
| 1135 int error; | |
| 2082 | 1136 nvlist_t *nvroot; |
| 1137 nvlist_t **spares; | |
| 1138 uint_t nspares; | |
| 789 | 1139 |
| 1140 if (!(spa_mode & FWRITE)) | |
| 1141 return (EROFS); | |
| 1142 | |
| 1143 /* | |
| 1144 * If a pool with this name exists, return failure. | |
| 1145 */ | |
| 1146 mutex_enter(&spa_namespace_lock); | |
| 1147 if (spa_lookup(pool) != NULL) { | |
| 1148 mutex_exit(&spa_namespace_lock); | |
| 1149 return (EEXIST); | |
| 1150 } | |
| 1151 | |
| 1152 /* | |
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1153 * Create and initialize the spa structure. |
| 789 | 1154 */ |
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1155 spa = spa_add(pool, altroot); |
| 789 | 1156 spa_activate(spa); |
| 1157 | |
| 1158 /* | |
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1159 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1160 * Pass TRUE for mosconfig because the user-supplied config |
| 1161 * is actually the one to trust when doing an import. | |
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1162 */ |
| 1732 | 1163 error = spa_load(spa, config, SPA_LOAD_IMPORT, B_TRUE); |
| 789 | 1164 |
| 2082 | 1165 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1166 /* | |
| 1167 * Toss any existing sparelist, as it doesn't have any validity anymore, | |
| 1168 * and conflicts with spa_has_spare(). | |
| 1169 */ | |
| 1170 if (spa->spa_sparelist) { | |
| 1171 nvlist_free(spa->spa_sparelist); | |
| 1172 spa->spa_sparelist = NULL; | |
| 1173 spa_load_spares(spa); | |
| 1174 } | |
| 1175 | |
| 1176 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
| 1177 &nvroot) == 0); | |
| 1178 if (error == 0) | |
| 1179 error = spa_validate_spares(spa, nvroot, -1ULL, | |
| 1180 VDEV_ALLOC_SPARE); | |
| 1181 spa_config_exit(spa, FTAG); | |
| 1182 | |
| 1183 if (error != 0) { | |
| 789 | 1184 spa_unload(spa); |
| 1185 spa_deactivate(spa); | |
| 1186 spa_remove(spa); | |
| 1187 mutex_exit(&spa_namespace_lock); | |
| 1188 return (error); | |
| 1189 } | |
| 1190 | |
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1191 /* |
| 2082 | 1192 * Override any spares as specified by the user, as these may have |
| 1193 * correct device names/devids, etc. | |
| 1194 */ | |
| 1195 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1196 &spares, &nspares) == 0) { | |
| 1197 if (spa->spa_sparelist) | |
| 1198 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1199 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1200 else | |
| 1201 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1202 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1203 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1204 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1205 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1206 spa_load_spares(spa); | |
| 1207 spa_config_exit(spa, FTAG); | |
| 1208 spa->spa_sync_spares = B_TRUE; | |
| 1209 } | |
| 1210 | |
| 1211 /* | |
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1212 * Update the config cache to include the newly-imported pool. |
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1213 */ |
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1214 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1215 |
| 789 | 1216 mutex_exit(&spa_namespace_lock); |
| 1217 | |
| 1218 /* | |
| 1219 * Resilver anything that's out of date. | |
| 1220 */ | |
| 1221 if (spa_mode & FWRITE) | |
| 1222 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1223 | |
| 1224 return (0); | |
| 1225 } | |
| 1226 | |
| 1227 /* | |
| 1228 * This (illegal) pool name is used when temporarily importing a spa_t in order | |
| 1229 * to get the vdev stats associated with the imported devices. | |
| 1230 */ | |
| 1231 #define TRYIMPORT_NAME "$import" | |
| 1232 | |
| 1233 nvlist_t * | |
| 1234 spa_tryimport(nvlist_t *tryconfig) | |
| 1235 { | |
| 1236 nvlist_t *config = NULL; | |
| 1237 char *poolname; | |
| 1238 spa_t *spa; | |
| 1239 uint64_t state; | |
| 1240 | |
| 1241 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) | |
| 1242 return (NULL); | |
| 1243 | |
| 1244 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) | |
| 1245 return (NULL); | |
| 1246 | |
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1247 /* |
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1248 * Create and initialize the spa structure. |
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1249 */ |
| 789 | 1250 mutex_enter(&spa_namespace_lock); |
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1251 spa = spa_add(TRYIMPORT_NAME, NULL); |
| 789 | 1252 spa_activate(spa); |
| 1253 | |
| 1254 /* | |
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1255 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1256 * Pass TRUE for mosconfig because the user-supplied config |
| 1257 * is actually the one to trust when doing an import. | |
| 789 | 1258 */ |
| 1732 | 1259 (void) spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE); |
| 789 | 1260 |
| 1261 /* | |
| 1262 * If 'tryconfig' was at least parsable, return the current config. | |
| 1263 */ | |
| 1264 if (spa->spa_root_vdev != NULL) { | |
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1265 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 1266 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
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1267 spa_config_exit(spa, FTAG); |
| 789 | 1268 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, |
| 1269 poolname) == 0); | |
| 1270 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
| 1271 state) == 0); | |
| 2082 | 1272 |
| 1273 /* | |
| 1274 * Add the list of hot spares. | |
| 1275 */ | |
| 1276 spa_add_spares(spa, config); | |
| 789 | 1277 } |
| 1278 | |
| 1279 spa_unload(spa); | |
| 1280 spa_deactivate(spa); | |
| 1281 spa_remove(spa); | |
| 1282 mutex_exit(&spa_namespace_lock); | |
| 1283 | |
| 1284 return (config); | |
| 1285 } | |
| 1286 | |
| 1287 /* | |
| 1288 * Pool export/destroy | |
| 1289 * | |
| 1290 * The act of destroying or exporting a pool is very simple. We make sure there | |
| 1291 * is no more pending I/O and any references to the pool are gone. Then, we | |
| 1292 * update the pool state and sync all the labels to disk, removing the | |
| 1293 * configuration from the cache afterwards. | |
| 1294 */ | |
| 1295 static int | |
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1296 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig) |
| 789 | 1297 { |
| 1298 spa_t *spa; | |
| 1299 | |
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1300 if (oldconfig) |
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1301 *oldconfig = NULL; |
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1302 |
| 789 | 1303 if (!(spa_mode & FWRITE)) |
| 1304 return (EROFS); | |
| 1305 | |
| 1306 mutex_enter(&spa_namespace_lock); | |
| 1307 if ((spa = spa_lookup(pool)) == NULL) { | |
| 1308 mutex_exit(&spa_namespace_lock); | |
| 1309 return (ENOENT); | |
| 1310 } | |
| 1311 | |
| 1312 /* | |
| 1544 | 1313 * Put a hold on the pool, drop the namespace lock, stop async tasks, |
| 1314 * reacquire the namespace lock, and see if we can export. | |
| 1315 */ | |
| 1316 spa_open_ref(spa, FTAG); | |
| 1317 mutex_exit(&spa_namespace_lock); | |
| 1318 spa_async_suspend(spa); | |
| 1319 mutex_enter(&spa_namespace_lock); | |
| 1320 spa_close(spa, FTAG); | |
| 1321 | |
| 1322 /* | |
| 789 | 1323 * The pool will be in core if it's openable, |
| 1324 * in which case we can modify its state. | |
| 1325 */ | |
| 1326 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { | |
| 1327 /* | |
| 1328 * Objsets may be open only because they're dirty, so we | |
| 1329 * have to force it to sync before checking spa_refcnt. | |
| 1330 */ | |
| 1331 spa_scrub_suspend(spa); | |
| 1332 txg_wait_synced(spa->spa_dsl_pool, 0); | |
| 1333 | |
| 1544 | 1334 /* |
| 1335 * A pool cannot be exported or destroyed if there are active | |
| 1336 * references. If we are resetting a pool, allow references by | |
| 1337 * fault injection handlers. | |
| 1338 */ | |
| 1339 if (!spa_refcount_zero(spa) || | |
| 1340 (spa->spa_inject_ref != 0 && | |
| 1341 new_state != POOL_STATE_UNINITIALIZED)) { | |
| 789 | 1342 spa_scrub_resume(spa); |
| 1544 | 1343 spa_async_resume(spa); |
| 789 | 1344 mutex_exit(&spa_namespace_lock); |
| 1345 return (EBUSY); | |
| 1346 } | |
| 1347 | |
| 1348 spa_scrub_resume(spa); | |
| 1349 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); | |
| 1350 | |
| 1351 /* | |
| 1352 * We want this to be reflected on every label, | |
| 1353 * so mark them all dirty. spa_unload() will do the | |
| 1354 * final sync that pushes these changes out. | |
| 1355 */ | |
| 1544 | 1356 if (new_state != POOL_STATE_UNINITIALIZED) { |
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1357 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1544 | 1358 spa->spa_state = new_state; |
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1359 spa->spa_final_txg = spa_last_synced_txg(spa) + 1; |
| 1544 | 1360 vdev_config_dirty(spa->spa_root_vdev); |
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1361 spa_config_exit(spa, FTAG); |
| 1544 | 1362 } |
| 789 | 1363 } |
| 1364 | |
| 1365 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 1366 spa_unload(spa); | |
| 1367 spa_deactivate(spa); | |
| 1368 } | |
| 1369 | |
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1370 if (oldconfig && spa->spa_config) |
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1371 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); |
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1372 |
| 1544 | 1373 if (new_state != POOL_STATE_UNINITIALIZED) { |
| 1374 spa_remove(spa); | |
| 1375 spa_config_sync(); | |
| 1376 } | |
| 789 | 1377 mutex_exit(&spa_namespace_lock); |
| 1378 | |
| 1379 return (0); | |
| 1380 } | |
| 1381 | |
| 1382 /* | |
| 1383 * Destroy a storage pool. | |
| 1384 */ | |
| 1385 int | |
| 1386 spa_destroy(char *pool) | |
| 1387 { | |
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1388 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL)); |
| 789 | 1389 } |
| 1390 | |
| 1391 /* | |
| 1392 * Export a storage pool. | |
| 1393 */ | |
| 1394 int | |
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1395 spa_export(char *pool, nvlist_t **oldconfig) |
| 789 | 1396 { |
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1397 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig)); |
| 789 | 1398 } |
| 1399 | |
| 1400 /* | |
| 1544 | 1401 * Similar to spa_export(), this unloads the spa_t without actually removing it |
| 1402 * from the namespace in any way. | |
| 1403 */ | |
| 1404 int | |
| 1405 spa_reset(char *pool) | |
| 1406 { | |
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1407 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL)); |
| 1544 | 1408 } |
| 1409 | |
| 1410 | |
| 1411 /* | |
| 789 | 1412 * ========================================================================== |
| 1413 * Device manipulation | |
| 1414 * ========================================================================== | |
| 1415 */ | |
| 1416 | |
| 1417 /* | |
| 1418 * Add capacity to a storage pool. | |
| 1419 */ | |
| 1420 int | |
| 1421 spa_vdev_add(spa_t *spa, nvlist_t *nvroot) | |
| 1422 { | |
| 1423 uint64_t txg; | |
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1424 int c, error; |
| 789 | 1425 vdev_t *rvd = spa->spa_root_vdev; |
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1426 vdev_t *vd, *tvd; |
| 2082 | 1427 nvlist_t **spares; |
| 1428 uint_t i, nspares; | |
| 789 | 1429 |
| 1430 txg = spa_vdev_enter(spa); | |
| 1431 | |
| 2082 | 1432 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, |
| 1433 VDEV_ALLOC_ADD)) != 0) | |
| 1434 return (spa_vdev_exit(spa, NULL, txg, error)); | |
| 1435 | |
| 1436 if ((error = spa_validate_spares(spa, nvroot, txg, | |
| 1437 VDEV_ALLOC_ADD)) != 0) | |
| 789 | 1438 return (spa_vdev_exit(spa, vd, txg, error)); |
| 1439 | |
| 2082 | 1440 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, |
| 1441 &spares, &nspares) != 0) | |
| 1442 nspares = 0; | |
| 1443 | |
| 1444 if (vd->vdev_children == 0 && nspares == 0) | |
| 1445 return (spa_vdev_exit(spa, vd, txg, EINVAL)); | |
| 1446 | |
| 1447 if (vd->vdev_children != 0) { | |
| 1448 if ((error = vdev_create(vd, txg, B_FALSE)) != 0) | |
| 1449 return (spa_vdev_exit(spa, vd, txg, error)); | |
| 1450 | |
| 1451 /* | |
| 1452 * Transfer each new top-level vdev from vd to rvd. | |
| 1453 */ | |
| 1454 for (c = 0; c < vd->vdev_children; c++) { | |
| 1455 tvd = vd->vdev_child[c]; | |
| 1456 vdev_remove_child(vd, tvd); | |
| 1457 tvd->vdev_id = rvd->vdev_children; | |
| 1458 vdev_add_child(rvd, tvd); | |
| 1459 vdev_config_dirty(tvd); | |
| 1460 } | |
| 1461 } | |
| 1462 | |
| 1463 if (nspares != 0) { | |
| 1464 if (spa->spa_sparelist != NULL) { | |
| 1465 nvlist_t **oldspares; | |
| 1466 uint_t oldnspares; | |
| 1467 nvlist_t **newspares; | |
| 1468 | |
| 1469 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 1470 ZPOOL_CONFIG_SPARES, &oldspares, &oldnspares) == 0); | |
| 1471 | |
| 1472 newspares = kmem_alloc(sizeof (void *) * | |
| 1473 (nspares + oldnspares), KM_SLEEP); | |
| 1474 for (i = 0; i < oldnspares; i++) | |
| 1475 VERIFY(nvlist_dup(oldspares[i], | |
| 1476 &newspares[i], KM_SLEEP) == 0); | |
| 1477 for (i = 0; i < nspares; i++) | |
| 1478 VERIFY(nvlist_dup(spares[i], | |
| 1479 &newspares[i + oldnspares], | |
| 1480 KM_SLEEP) == 0); | |
| 1481 | |
| 1482 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1483 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1484 | |
| 1485 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1486 ZPOOL_CONFIG_SPARES, newspares, | |
| 1487 nspares + oldnspares) == 0); | |
| 1488 for (i = 0; i < oldnspares + nspares; i++) | |
| 1489 nvlist_free(newspares[i]); | |
| 1490 kmem_free(newspares, (oldnspares + nspares) * | |
| 1491 sizeof (void *)); | |
| 1492 } else { | |
| 1493 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1494 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1495 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1496 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1497 } | |
| 1498 | |
| 1499 spa_load_spares(spa); | |
| 1500 spa->spa_sync_spares = B_TRUE; | |
| 789 | 1501 } |
| 1502 | |
| 1503 /* | |
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1504 * We have to be careful when adding new vdevs to an existing pool. |
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1505 * If other threads start allocating from these vdevs before we |
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1506 * sync the config cache, and we lose power, then upon reboot we may |
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1507 * fail to open the pool because there are DVAs that the config cache |
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1508 * can't translate. Therefore, we first add the vdevs without |
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1509 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); |
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1510 * and then let spa_config_update() initialize the new metaslabs. |
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1511 * |
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1512 * spa_load() checks for added-but-not-initialized vdevs, so that |
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1513 * if we lose power at any point in this sequence, the remaining |
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1514 * steps will be completed the next time we load the pool. |
| 789 | 1515 */ |
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1516 (void) spa_vdev_exit(spa, vd, txg, 0); |
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1517 |
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1518 mutex_enter(&spa_namespace_lock); |
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1519 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1520 mutex_exit(&spa_namespace_lock); |
| 789 | 1521 |
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1522 return (0); |
| 789 | 1523 } |
| 1524 | |
| 1525 /* | |
| 1526 * Attach a device to a mirror. The arguments are the path to any device | |
| 1527 * in the mirror, and the nvroot for the new device. If the path specifies | |
| 1528 * a device that is not mirrored, we automatically insert the mirror vdev. | |
| 1529 * | |
| 1530 * If 'replacing' is specified, the new device is intended to replace the | |
| 1531 * existing device; in this case the two devices are made into their own | |
| 1532 * mirror using the 'replacing' vdev, which is functionally idendical to | |
| 1533 * the mirror vdev (it actually reuses all the same ops) but has a few | |
| 1534 * extra rules: you can't attach to it after it's been created, and upon | |
| 1535 * completion of resilvering, the first disk (the one being replaced) | |
| 1536 * is automatically detached. | |
| 1537 */ | |
| 1538 int | |
| 1544 | 1539 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) |
| 789 | 1540 { |
| 1541 uint64_t txg, open_txg; | |
| 1542 int error; | |
| 1543 vdev_t *rvd = spa->spa_root_vdev; | |
| 1544 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; | |
| 2082 | 1545 vdev_ops_t *pvops; |
| 789 | 1546 |
| 1547 txg = spa_vdev_enter(spa); | |
| 1548 | |
| 1544 | 1549 oldvd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1550 |
| 1551 if (oldvd == NULL) | |
| 1552 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1553 | |
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1554 if (!oldvd->vdev_ops->vdev_op_leaf) |
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1555 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1556 |
| 789 | 1557 pvd = oldvd->vdev_parent; |
| 1558 | |
| 2082 | 1559 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, |
| 1560 VDEV_ALLOC_ADD)) != 0 || newrootvd->vdev_children != 1) | |
| 789 | 1561 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); |
| 1562 | |
| 1563 newvd = newrootvd->vdev_child[0]; | |
| 1564 | |
| 1565 if (!newvd->vdev_ops->vdev_op_leaf) | |
| 1566 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); | |
| 1567 | |
| 2082 | 1568 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) |
| 789 | 1569 return (spa_vdev_exit(spa, newrootvd, txg, error)); |
| 1570 | |
| 2082 | 1571 if (!replacing) { |
| 1572 /* | |
| 1573 * For attach, the only allowable parent is a mirror or the root | |
| 1574 * vdev. | |
| 1575 */ | |
| 1576 if (pvd->vdev_ops != &vdev_mirror_ops && | |
| 1577 pvd->vdev_ops != &vdev_root_ops) | |
| 1578 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1579 | |
| 1580 pvops = &vdev_mirror_ops; | |
| 1581 } else { | |
| 1582 /* | |
| 1583 * Active hot spares can only be replaced by inactive hot | |
| 1584 * spares. | |
| 1585 */ | |
| 1586 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1587 pvd->vdev_child[1] == oldvd && | |
| 1588 !spa_has_spare(spa, newvd->vdev_guid)) | |
| 1589 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1590 | |
| 1591 /* | |
| 1592 * If the source is a hot spare, and the parent isn't already a | |
| 1593 * spare, then we want to create a new hot spare. Otherwise, we | |
| 1594 * want to create a replacing vdev. | |
| 1595 */ | |
| 1596 if (pvd->vdev_ops == &vdev_replacing_ops) | |
| 1597 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1598 else if (pvd->vdev_ops != &vdev_spare_ops && | |
| 1599 newvd->vdev_isspare) | |
| 1600 pvops = &vdev_spare_ops; | |
| 1601 else | |
| 1602 pvops = &vdev_replacing_ops; | |
| 1603 } | |
| 1604 | |
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1605 /* |
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1606 * Compare the new device size with the replaceable/attachable |
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1607 * device size. |
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1608 */ |
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1609 if (newvd->vdev_psize < vdev_get_rsize(oldvd)) |
| 789 | 1610 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); |
| 1611 | |
| 1732 | 1612 /* |
| 1613 * The new device cannot have a higher alignment requirement | |
| 1614 * than the top-level vdev. | |
| 1615 */ | |
| 1616 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) | |
| 789 | 1617 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); |
| 1618 | |
| 1619 /* | |
| 1620 * If this is an in-place replacement, update oldvd's path and devid | |
| 1621 * to make it distinguishable from newvd, and unopenable from now on. | |
| 1622 */ | |
| 1623 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { | |
| 1624 spa_strfree(oldvd->vdev_path); | |
| 1625 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, | |
| 1626 KM_SLEEP); | |
| 1627 (void) sprintf(oldvd->vdev_path, "%s/%s", | |
| 1628 newvd->vdev_path, "old"); | |
| 1629 if (oldvd->vdev_devid != NULL) { | |
| 1630 spa_strfree(oldvd->vdev_devid); | |
| 1631 oldvd->vdev_devid = NULL; | |
| 1632 } | |
| 1633 } | |
| 1634 | |
| 1635 /* | |
| 2082 | 1636 * If the parent is not a mirror, or if we're replacing, insert the new |
| 1637 * mirror/replacing/spare vdev above oldvd. | |
| 789 | 1638 */ |
| 1639 if (pvd->vdev_ops != pvops) | |
| 1640 pvd = vdev_add_parent(oldvd, pvops); | |
| 1641 | |
| 1642 ASSERT(pvd->vdev_top->vdev_parent == rvd); | |
| 1643 ASSERT(pvd->vdev_ops == pvops); | |
| 1644 ASSERT(oldvd->vdev_parent == pvd); | |
| 1645 | |
| 1646 /* | |
| 1647 * Extract the new device from its root and add it to pvd. | |
| 1648 */ | |
| 1649 vdev_remove_child(newrootvd, newvd); | |
| 1650 newvd->vdev_id = pvd->vdev_children; | |
| 1651 vdev_add_child(pvd, newvd); | |
| 1652 | |
| 1544 | 1653 /* |
| 1654 * If newvd is smaller than oldvd, but larger than its rsize, | |
| 1655 * the addition of newvd may have decreased our parent's asize. | |
| 1656 */ | |
| 1657 pvd->vdev_asize = MIN(pvd->vdev_asize, newvd->vdev_asize); | |
| 1658 | |
| 789 | 1659 tvd = newvd->vdev_top; |
| 1660 ASSERT(pvd->vdev_top == tvd); | |
| 1661 ASSERT(tvd->vdev_parent == rvd); | |
| 1662 | |
| 1663 vdev_config_dirty(tvd); | |
| 1664 | |
| 1665 /* | |
| 1666 * Set newvd's DTL to [TXG_INITIAL, open_txg]. It will propagate | |
| 1667 * upward when spa_vdev_exit() calls vdev_dtl_reassess(). | |
| 1668 */ | |
| 1669 open_txg = txg + TXG_CONCURRENT_STATES - 1; | |
| 1670 | |
| 1671 mutex_enter(&newvd->vdev_dtl_lock); | |
| 1672 space_map_add(&newvd->vdev_dtl_map, TXG_INITIAL, | |
| 1673 open_txg - TXG_INITIAL + 1); | |
| 1674 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1675 | |
| 1544 | 1676 dprintf("attached %s in txg %llu\n", newvd->vdev_path, txg); |
| 1677 | |
| 789 | 1678 /* |
| 1679 * Mark newvd's DTL dirty in this txg. | |
| 1680 */ | |
| 1732 | 1681 vdev_dirty(tvd, VDD_DTL, newvd, txg); |
| 789 | 1682 |
| 1683 (void) spa_vdev_exit(spa, newrootvd, open_txg, 0); | |
| 1684 | |
| 1685 /* | |
| 1686 * Kick off a resilver to update newvd. | |
| 1687 */ | |
| 1688 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1689 | |
| 1690 return (0); | |
| 1691 } | |
| 1692 | |
| 1693 /* | |
| 1694 * Detach a device from a mirror or replacing vdev. | |
| 1695 * If 'replace_done' is specified, only detach if the parent | |
| 1696 * is a replacing vdev. | |
| 1697 */ | |
| 1698 int | |
| 1544 | 1699 spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) |
| 789 | 1700 { |
| 1701 uint64_t txg; | |
| 1702 int c, t, error; | |
| 1703 vdev_t *rvd = spa->spa_root_vdev; | |
| 1704 vdev_t *vd, *pvd, *cvd, *tvd; | |
| 2082 | 1705 boolean_t unspare = B_FALSE; |
| 1706 uint64_t unspare_guid; | |
| 789 | 1707 |
| 1708 txg = spa_vdev_enter(spa); | |
| 1709 | |
| 1544 | 1710 vd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1711 |
| 1712 if (vd == NULL) | |
| 1713 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1714 | |
|
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1715 if (!vd->vdev_ops->vdev_op_leaf) |
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1716 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1717 |
| 789 | 1718 pvd = vd->vdev_parent; |
| 1719 | |
| 1720 /* | |
| 1721 * If replace_done is specified, only remove this device if it's | |
| 2082 | 1722 * the first child of a replacing vdev. For the 'spare' vdev, either |
| 1723 * disk can be removed. | |
| 789 | 1724 */ |
| 2082 | 1725 if (replace_done) { |
| 1726 if (pvd->vdev_ops == &vdev_replacing_ops) { | |
| 1727 if (vd->vdev_id != 0) | |
| 1728 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1729 } else if (pvd->vdev_ops != &vdev_spare_ops) { | |
| 1730 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1731 } | |
| 1732 } | |
| 1733 | |
| 1734 ASSERT(pvd->vdev_ops != &vdev_spare_ops || | |
| 1735 spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 789 | 1736 |
| 1737 /* | |
| 2082 | 1738 * Only mirror, replacing, and spare vdevs support detach. |
| 789 | 1739 */ |
| 1740 if (pvd->vdev_ops != &vdev_replacing_ops && | |
| 2082 | 1741 pvd->vdev_ops != &vdev_mirror_ops && |
| 1742 pvd->vdev_ops != &vdev_spare_ops) | |
| 789 | 1743 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
| 1744 | |
| 1745 /* | |
| 1746 * If there's only one replica, you can't detach it. | |
| 1747 */ | |
| 1748 if (pvd->vdev_children <= 1) | |
| 1749 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
| 1750 | |
| 1751 /* | |
| 1752 * If all siblings have non-empty DTLs, this device may have the only | |
| 1753 * valid copy of the data, which means we cannot safely detach it. | |
| 1754 * | |
| 1755 * XXX -- as in the vdev_offline() case, we really want a more | |
| 1756 * precise DTL check. | |
| 1757 */ | |
| 1758 for (c = 0; c < pvd->vdev_children; c++) { | |
| 1759 uint64_t dirty; | |
| 1760 | |
| 1761 cvd = pvd->vdev_child[c]; | |
| 1762 if (cvd == vd) | |
| 1763 continue; | |
| 1764 if (vdev_is_dead(cvd)) | |
| 1765 continue; | |
| 1766 mutex_enter(&cvd->vdev_dtl_lock); | |
| 1767 dirty = cvd->vdev_dtl_map.sm_space | | |
| 1768 cvd->vdev_dtl_scrub.sm_space; | |
| 1769 mutex_exit(&cvd->vdev_dtl_lock); | |
| 1770 if (!dirty) | |
| 1771 break; | |
| 1772 } | |
| 2082 | 1773 |
| 1774 /* | |
| 1775 * If we are a replacing or spare vdev, then we can always detach the | |
| 1776 * latter child, as that is how one cancels the operation. | |
| 1777 */ | |
| 1778 if ((pvd->vdev_ops == &vdev_mirror_ops || vd->vdev_id != 1) && | |
| 1779 c == pvd->vdev_children) | |
| 789 | 1780 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); |
| 1781 | |
| 1782 /* | |
| 2082 | 1783 * If we are detaching the original disk from a spare, then it implies |
| 1784 * that the spare should become a real disk, and be removed from the | |
| 1785 * active spare list for the pool. | |
| 1786 */ | |
| 1787 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1788 vd->vdev_id == 0) | |
| 1789 unspare = B_TRUE; | |
| 1790 | |
| 1791 /* | |
| 789 | 1792 * Erase the disk labels so the disk can be used for other things. |
| 1793 * This must be done after all other error cases are handled, | |
| 1794 * but before we disembowel vd (so we can still do I/O to it). | |
| 1795 * But if we can't do it, don't treat the error as fatal -- | |
| 1796 * it may be that the unwritability of the disk is the reason | |
| 1797 * it's being detached! | |
| 1798 */ | |
| 2082 | 1799 error = vdev_label_init(vd, 0, B_FALSE); |
| 789 | 1800 if (error) |
| 1801 dprintf("unable to erase labels on %s\n", vdev_description(vd)); | |
| 1802 | |
| 1803 /* | |
| 1804 * Remove vd from its parent and compact the parent's children. | |
| 1805 */ | |
| 1806 vdev_remove_child(pvd, vd); | |
| 1807 vdev_compact_children(pvd); | |
| 1808 | |
| 1809 /* | |
| 1810 * Remember one of the remaining children so we can get tvd below. | |
| 1811 */ | |
| 1812 cvd = pvd->vdev_child[0]; | |
| 1813 | |
| 1814 /* | |
| 2082 | 1815 * If we need to remove the remaining child from the list of hot spares, |
| 1816 * do it now, marking the vdev as no longer a spare in the process. We | |
| 1817 * must do this before vdev_remove_parent(), because that can change the | |
| 1818 * GUID if it creates a new toplevel GUID. | |
| 1819 */ | |
| 1820 if (unspare) { | |
| 1821 ASSERT(cvd->vdev_isspare); | |
| 1822 spa_spare_remove(cvd->vdev_guid); | |
| 1823 cvd->vdev_isspare = B_FALSE; | |
| 1824 unspare_guid = cvd->vdev_guid; | |
| 1825 } | |
| 1826 | |
| 1827 /* | |
| 789 | 1828 * If the parent mirror/replacing vdev only has one child, |
| 1829 * the parent is no longer needed. Remove it from the tree. | |
| 1830 */ | |
| 1831 if (pvd->vdev_children == 1) | |
| 1832 vdev_remove_parent(cvd); | |
| 1833 | |
| 1834 /* | |
| 1835 * We don't set tvd until now because the parent we just removed | |
| 1836 * may have been the previous top-level vdev. | |
| 1837 */ | |
| 1838 tvd = cvd->vdev_top; | |
| 1839 ASSERT(tvd->vdev_parent == rvd); | |
| 1840 | |
| 1841 /* | |
| 1842 * Reopen this top-level vdev to reassess health after detach. | |
| 1843 */ | |
| 1544 | 1844 vdev_reopen(tvd); |
| 789 | 1845 |
| 1846 /* | |
| 1847 * If the device we just detached was smaller than the others, | |
| 1732 | 1848 * it may be possible to add metaslabs (i.e. grow the pool). |
| 1849 * vdev_metaslab_init() can't fail because the existing metaslabs | |
| 1850 * are already in core, so there's nothing to read from disk. | |
| 789 | 1851 */ |
| 1732 | 1852 VERIFY(vdev_metaslab_init(tvd, txg) == 0); |
| 789 | 1853 |
| 1854 vdev_config_dirty(tvd); | |
| 1855 | |
| 1856 /* | |
| 1857 * Mark vd's DTL as dirty in this txg. | |
| 1858 * vdev_dtl_sync() will see that vd->vdev_detached is set | |
| 1859 * and free vd's DTL object in syncing context. | |
| 1860 * But first make sure we're not on any *other* txg's DTL list, | |
| 1861 * to prevent vd from being accessed after it's freed. | |
| 1862 */ | |
| 1863 for (t = 0; t < TXG_SIZE; t++) | |
| 1864 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); | |
| 1732 | 1865 vd->vdev_detached = B_TRUE; |
| 1866 vdev_dirty(tvd, VDD_DTL, vd, txg); | |
| 789 | 1867 |
| 1544 | 1868 dprintf("detached %s in txg %llu\n", vd->vdev_path, txg); |
| 789 | 1869 |
| 2082 | 1870 error = spa_vdev_exit(spa, vd, txg, 0); |
| 1871 | |
| 1872 /* | |
| 1873 * If we are supposed to remove the given vdev from the list of spares, | |
| 1874 * iterate over all pools in the system and replace it if it's present. | |
| 1875 */ | |
| 1876 if (unspare) { | |
| 1877 spa = NULL; | |
| 1878 mutex_enter(&spa_namespace_lock); | |
| 1879 while ((spa = spa_next(spa)) != NULL) { | |
| 1880 if (spa->spa_state != POOL_STATE_ACTIVE) | |
| 1881 continue; | |
| 1882 | |
| 1883 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); | |
| 1884 } | |
| 1885 mutex_exit(&spa_namespace_lock); | |
| 1886 } | |
| 1887 | |
| 1888 return (error); | |
| 1889 } | |
| 1890 | |
| 1891 /* | |
| 1892 * Remove a device from the pool. Currently, this supports removing only hot | |
| 1893 * spares. | |
| 1894 */ | |
| 1895 int | |
| 1896 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) | |
| 1897 { | |
| 1898 vdev_t *vd; | |
| 1899 nvlist_t **spares, *nv, **newspares; | |
| 1900 uint_t i, j, nspares; | |
| 1901 int ret = 0; | |
| 1902 | |
| 1903 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1904 | |
| 1905 vd = spa_lookup_by_guid(spa, guid); | |
| 1906 | |
| 1907 nv = NULL; | |
| 1908 if (spa->spa_spares != NULL && | |
| 1909 nvlist_lookup_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1910 &spares, &nspares) == 0) { | |
| 1911 for (i = 0; i < nspares; i++) { | |
| 1912 uint64_t theguid; | |
| 1913 | |
| 1914 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 1915 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 1916 if (theguid == guid) { | |
| 1917 nv = spares[i]; | |
| 1918 break; | |
| 1919 } | |
| 1920 } | |
| 1921 } | |
| 1922 | |
| 1923 /* | |
| 1924 * We only support removing a hot spare, and only if it's not currently | |
| 1925 * in use in this pool. | |
| 1926 */ | |
| 1927 if (nv == NULL && vd == NULL) { | |
| 1928 ret = ENOENT; | |
| 1929 goto out; | |
| 1930 } | |
| 1931 | |
| 1932 if (nv == NULL && vd != NULL) { | |
| 1933 ret = ENOTSUP; | |
| 1934 goto out; | |
| 1935 } | |
| 1936 | |
| 1937 if (!unspare && nv != NULL && vd != NULL) { | |
| 1938 ret = EBUSY; | |
| 1939 goto out; | |
| 1940 } | |
| 1941 | |
| 1942 if (nspares == 1) { | |
| 1943 newspares = NULL; | |
| 1944 } else { | |
| 1945 newspares = kmem_alloc((nspares - 1) * sizeof (void *), | |
| 1946 KM_SLEEP); | |
| 1947 for (i = 0, j = 0; i < nspares; i++) { | |
| 1948 if (spares[i] != nv) | |
| 1949 VERIFY(nvlist_dup(spares[i], | |
| 1950 &newspares[j++], KM_SLEEP) == 0); | |
| 1951 } | |
| 1952 } | |
| 1953 | |
| 1954 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1955 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1956 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1957 newspares, nspares - 1) == 0); | |
| 1958 for (i = 0; i < nspares - 1; i++) | |
| 1959 nvlist_free(newspares[i]); | |
| 1960 kmem_free(newspares, (nspares - 1) * sizeof (void *)); | |
| 1961 spa_load_spares(spa); | |
| 1962 spa->spa_sync_spares = B_TRUE; | |
| 1963 | |
| 1964 out: | |
| 1965 spa_config_exit(spa, FTAG); | |
| 1966 | |
| 1967 return (ret); | |
| 789 | 1968 } |
| 1969 | |
| 1970 /* | |
| 1544 | 1971 * Find any device that's done replacing, so we can detach it. |
| 789 | 1972 */ |
| 1544 | 1973 static vdev_t * |
| 1974 spa_vdev_replace_done_hunt(vdev_t *vd) | |
| 789 | 1975 { |
| 1544 | 1976 vdev_t *newvd, *oldvd; |
| 789 | 1977 int c; |
| 1978 | |
| 1544 | 1979 for (c = 0; c < vd->vdev_children; c++) { |
| 1980 oldvd = spa_vdev_replace_done_hunt(vd->vdev_child[c]); | |
| 1981 if (oldvd != NULL) | |
| 1982 return (oldvd); | |
| 1983 } | |
| 789 | 1984 |
| 1985 if (vd->vdev_ops == &vdev_replacing_ops && vd->vdev_children == 2) { | |
| 1544 | 1986 oldvd = vd->vdev_child[0]; |
| 1987 newvd = vd->vdev_child[1]; | |
| 789 | 1988 |
| 1544 | 1989 mutex_enter(&newvd->vdev_dtl_lock); |
| 1990 if (newvd->vdev_dtl_map.sm_space == 0 && | |
| 1991 newvd->vdev_dtl_scrub.sm_space == 0) { | |
| 1992 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1993 return (oldvd); | |
| 1994 } | |
| 1995 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1996 } | |
| 789 | 1997 |
| 1544 | 1998 return (NULL); |
| 789 | 1999 } |
| 2000 | |
| 1544 | 2001 static void |
| 789 | 2002 spa_vdev_replace_done(spa_t *spa) |
| 2003 { | |
| 1544 | 2004 vdev_t *vd; |
| 2082 | 2005 vdev_t *pvd; |
| 1544 | 2006 uint64_t guid; |
| 2082 | 2007 uint64_t pguid = 0; |
| 789 | 2008 |
| 1544 | 2009 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2010 |
| 1544 | 2011 while ((vd = spa_vdev_replace_done_hunt(spa->spa_root_vdev)) != NULL) { |
| 2012 guid = vd->vdev_guid; | |
| 2082 | 2013 /* |
| 2014 * If we have just finished replacing a hot spared device, then | |
| 2015 * we need to detach the parent's first child (the original hot | |
| 2016 * spare) as well. | |
| 2017 */ | |
| 2018 pvd = vd->vdev_parent; | |
| 2019 if (pvd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
| 2020 pvd->vdev_id == 0) { | |
| 2021 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); | |
| 2022 ASSERT(pvd->vdev_parent->vdev_children == 2); | |
| 2023 pguid = pvd->vdev_parent->vdev_child[1]->vdev_guid; | |
| 2024 } | |
| 1544 | 2025 spa_config_exit(spa, FTAG); |
| 2026 if (spa_vdev_detach(spa, guid, B_TRUE) != 0) | |
| 2027 return; | |
| 2082 | 2028 if (pguid != 0 && spa_vdev_detach(spa, pguid, B_TRUE) != 0) |
| 2029 return; | |
| 1544 | 2030 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2031 } |
| 2032 | |
| 1544 | 2033 spa_config_exit(spa, FTAG); |
| 789 | 2034 } |
| 2035 | |
| 2036 /* | |
|
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2037 * Update the stored path for this vdev. Dirty the vdev configuration, relying |
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2038 * on spa_vdev_enter/exit() to synchronize the labels and cache. |
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2039 */ |
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2040 int |
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2041 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) |
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2042 { |
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2043 vdev_t *rvd, *vd; |
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2044 uint64_t txg; |
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2045 |
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2046 rvd = spa->spa_root_vdev; |
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2047 |
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2048 txg = spa_vdev_enter(spa); |
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2049 |
| 2082 | 2050 if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) { |
| 2051 /* | |
| 2052 * Determine if this is a reference to a hot spare. In that | |
| 2053 * case, update the path as stored in the spare list. | |
| 2054 */ | |
| 2055 nvlist_t **spares; | |
| 2056 uint_t i, nspares; | |
| 2057 if (spa->spa_sparelist != NULL) { | |
| 2058 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 2059 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 2060 for (i = 0; i < nspares; i++) { | |
| 2061 uint64_t theguid; | |
| 2062 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 2063 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 2064 if (theguid == guid) | |
| 2065 break; | |
| 2066 } | |
| 2067 | |
| 2068 if (i == nspares) | |
| 2069 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2070 | |
| 2071 VERIFY(nvlist_add_string(spares[i], | |
| 2072 ZPOOL_CONFIG_PATH, newpath) == 0); | |
| 2073 spa_load_spares(spa); | |
| 2074 spa->spa_sync_spares = B_TRUE; | |
| 2075 return (spa_vdev_exit(spa, NULL, txg, 0)); | |
| 2076 } else { | |
| 2077 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2078 } | |
| 2079 } | |
|
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2080 |
|
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2081 if (!vd->vdev_ops->vdev_op_leaf) |
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2082 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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2083 |
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2084 spa_strfree(vd->vdev_path); |
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2085 vd->vdev_path = spa_strdup(newpath); |
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2086 |
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2087 vdev_config_dirty(vd->vdev_top); |
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2088 |
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2089 return (spa_vdev_exit(spa, NULL, txg, 0)); |
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2090 } |
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2091 |
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2092 /* |
| 789 | 2093 * ========================================================================== |
| 2094 * SPA Scrubbing | |
| 2095 * ========================================================================== | |
| 2096 */ | |
| 2097 | |
| 1544 | 2098 void |
| 2099 spa_scrub_throttle(spa_t *spa, int direction) | |
| 2100 { | |
| 2101 mutex_enter(&spa->spa_scrub_lock); | |
| 2102 spa->spa_scrub_throttled += direction; | |
| 2103 ASSERT(spa->spa_scrub_throttled >= 0); | |
| 2104 if (spa->spa_scrub_throttled == 0) | |
| 2105 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 2106 mutex_exit(&spa->spa_scrub_lock); | |
| 2107 } | |
| 789 | 2108 |
| 2109 static void | |
| 2110 spa_scrub_io_done(zio_t *zio) | |
| 2111 { | |
| 2112 spa_t *spa = zio->io_spa; | |
| 2113 | |
| 2114 zio_buf_free(zio->io_data, zio->io_size); | |
| 2115 | |
| 2116 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2117 if (zio->io_error && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { |
|
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2118 vdev_t *vd = zio->io_vd ? zio->io_vd : spa->spa_root_vdev; |
| 789 | 2119 spa->spa_scrub_errors++; |
| 2120 mutex_enter(&vd->vdev_stat_lock); | |
| 2121 vd->vdev_stat.vs_scrub_errors++; | |
| 2122 mutex_exit(&vd->vdev_stat_lock); | |
| 2123 } | |
| 1544 | 2124 if (--spa->spa_scrub_inflight == 0) { |
| 2125 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 2126 ASSERT(spa->spa_scrub_throttled == 0); | |
| 2127 } | |
| 2128 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 2129 } |
| 2130 | |
| 2131 static void | |
| 1544 | 2132 spa_scrub_io_start(spa_t *spa, blkptr_t *bp, int priority, int flags, |
| 2133 zbookmark_t *zb) | |
| 789 | 2134 { |
| 2135 size_t size = BP_GET_LSIZE(bp); | |
| 2136 void *data = zio_buf_alloc(size); | |
| 2137 | |
| 2138 mutex_enter(&spa->spa_scrub_lock); | |
| 2139 spa->spa_scrub_inflight++; | |
| 2140 mutex_exit(&spa->spa_scrub_lock); | |
| 2141 | |
| 1544 | 2142 if (zb->zb_level == -1 && BP_GET_TYPE(bp) != DMU_OT_OBJSET) |
| 2143 flags |= ZIO_FLAG_SPECULATIVE; /* intent log block */ | |
| 2144 | |
|
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2145 flags |= ZIO_FLAG_SCRUB_THREAD | ZIO_FLAG_CANFAIL; |
| 1544 | 2146 |
| 789 | 2147 zio_nowait(zio_read(NULL, spa, bp, data, size, |
| 1544 | 2148 spa_scrub_io_done, NULL, priority, flags, zb)); |
| 789 | 2149 } |
| 2150 | |
| 2151 /* ARGSUSED */ | |
| 2152 static int | |
| 2153 spa_scrub_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a) | |
| 2154 { | |
| 2155 blkptr_t *bp = &bc->bc_blkptr; | |
|
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2156 vdev_t *vd = spa->spa_root_vdev; |
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2157 dva_t *dva = bp->blk_dva; |
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2158 int needs_resilver = B_FALSE; |
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2159 int d; |
| 789 | 2160 |
|
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2161 if (bc->bc_errno) { |
| 789 | 2162 /* |
| 2163 * We can't scrub this block, but we can continue to scrub | |
| 2164 * the rest of the pool. Note the error and move along. | |
| 2165 */ | |
| 2166 mutex_enter(&spa->spa_scrub_lock); | |
| 2167 spa->spa_scrub_errors++; | |
| 2168 mutex_exit(&spa->spa_scrub_lock); | |
| 2169 | |
|
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2170 mutex_enter(&vd->vdev_stat_lock); |
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2171 vd->vdev_stat.vs_scrub_errors++; |
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2172 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2173 |
| 2174 return (ERESTART); | |
| 2175 } | |
| 2176 | |
| 2177 ASSERT(bp->blk_birth < spa->spa_scrub_maxtxg); | |
| 2178 | |
|
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2179 for (d = 0; d < BP_GET_NDVAS(bp); d++) { |
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2180 vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dva[d])); |
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2181 |
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2182 ASSERT(vd != NULL); |
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2183 |
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2184 /* |
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2185 * Keep track of how much data we've examined so that |
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2186 * zpool(1M) status can make useful progress reports. |
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2187 */ |
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2188 mutex_enter(&vd->vdev_stat_lock); |
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2189 vd->vdev_stat.vs_scrub_examined += DVA_GET_ASIZE(&dva[d]); |
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2190 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2191 |
|
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2192 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER) { |
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2193 if (DVA_GET_GANG(&dva[d])) { |
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2194 /* |
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2195 * Gang members may be spread across multiple |
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2196 * vdevs, so the best we can do is look at the |
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2197 * pool-wide DTL. |
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2198 * XXX -- it would be better to change our |
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2199 * allocation policy to ensure that this can't |
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2200 * happen. |
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2201 */ |
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2202 vd = spa->spa_root_vdev; |
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2203 } |
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2204 if (vdev_dtl_contains(&vd->vdev_dtl_map, |
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2205 bp->blk_birth, 1)) |
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2206 needs_resilver = B_TRUE; |
| 789 | 2207 } |
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2208 } |
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2209 |
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2210 if (spa->spa_scrub_type == POOL_SCRUB_EVERYTHING) |
| 789 | 2211 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_SCRUB, |
| 1544 | 2212 ZIO_FLAG_SCRUB, &bc->bc_bookmark); |
|
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2213 else if (needs_resilver) |
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2214 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_RESILVER, |
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2215 ZIO_FLAG_RESILVER, &bc->bc_bookmark); |
| 789 | 2216 |
| 2217 return (0); | |
| 2218 } | |
| 2219 | |
| 2220 static void | |
| 2221 spa_scrub_thread(spa_t *spa) | |
| 2222 { | |
| 2223 callb_cpr_t cprinfo; | |
| 2224 traverse_handle_t *th = spa->spa_scrub_th; | |
| 2225 vdev_t *rvd = spa->spa_root_vdev; | |
| 2226 pool_scrub_type_t scrub_type = spa->spa_scrub_type; | |
| 2227 int error = 0; | |
| 2228 boolean_t complete; | |
| 2229 | |
| 2230 CALLB_CPR_INIT(&cprinfo, &spa->spa_scrub_lock, callb_generic_cpr, FTAG); | |
| 2231 | |
|
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2232 /* |
|
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|
2233 * If we're restarting due to a snapshot create/delete, |
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2234 * wait for that to complete. |
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2235 */ |
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2236 txg_wait_synced(spa_get_dsl(spa), 0); |
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2237 |
| 1544 | 2238 dprintf("start %s mintxg=%llu maxtxg=%llu\n", |
| 2239 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 2240 spa->spa_scrub_mintxg, spa->spa_scrub_maxtxg); | |
| 2241 | |
| 2242 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2243 vdev_reopen(rvd); /* purge all vdev caches */ | |
| 789 | 2244 vdev_config_dirty(rvd); /* rewrite all disk labels */ |
| 2245 vdev_scrub_stat_update(rvd, scrub_type, B_FALSE); | |
| 1544 | 2246 spa_config_exit(spa, FTAG); |
| 789 | 2247 |
| 2248 mutex_enter(&spa->spa_scrub_lock); | |
| 2249 spa->spa_scrub_errors = 0; | |
| 2250 spa->spa_scrub_active = 1; | |
| 1544 | 2251 ASSERT(spa->spa_scrub_inflight == 0); |
| 2252 ASSERT(spa->spa_scrub_throttled == 0); | |
| 789 | 2253 |
| 2254 while (!spa->spa_scrub_stop) { | |
| 2255 CALLB_CPR_SAFE_BEGIN(&cprinfo); | |
| 1544 | 2256 while (spa->spa_scrub_suspended) { |
| 789 | 2257 spa->spa_scrub_active = 0; |
| 2258 cv_broadcast(&spa->spa_scrub_cv); | |
| 2259 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2260 spa->spa_scrub_active = 1; | |
| 2261 } | |
| 2262 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_scrub_lock); | |
| 2263 | |
| 2264 if (spa->spa_scrub_restart_txg != 0) | |
| 2265 break; | |
| 2266 | |
| 2267 mutex_exit(&spa->spa_scrub_lock); | |
| 2268 error = traverse_more(th); | |
| 2269 mutex_enter(&spa->spa_scrub_lock); | |
| 2270 if (error != EAGAIN) | |
| 2271 break; | |
| 1544 | 2272 |
| 2273 while (spa->spa_scrub_throttled > 0) | |
| 2274 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 789 | 2275 } |
| 2276 | |
| 2277 while (spa->spa_scrub_inflight) | |
| 2278 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2279 | |
|
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2280 spa->spa_scrub_active = 0; |
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2281 cv_broadcast(&spa->spa_scrub_cv); |
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2282 |
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2283 mutex_exit(&spa->spa_scrub_lock); |
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2284 |
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2285 spa_config_enter(spa, RW_WRITER, FTAG); |
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2286 |
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2287 mutex_enter(&spa->spa_scrub_lock); |
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2288 |
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2289 /* |
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2290 * Note: we check spa_scrub_restart_txg under both spa_scrub_lock |
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2291 * AND the spa config lock to synchronize with any config changes |
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2292 * that revise the DTLs under spa_vdev_enter() / spa_vdev_exit(). |
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2293 */ |
| 789 | 2294 if (spa->spa_scrub_restart_txg != 0) |
| 2295 error = ERESTART; | |
| 2296 | |
| 1544 | 2297 if (spa->spa_scrub_stop) |
| 2298 error = EINTR; | |
| 2299 | |
| 789 | 2300 /* |
| 1544 | 2301 * Even if there were uncorrectable errors, we consider the scrub |
| 2302 * completed. The downside is that if there is a transient error during | |
| 2303 * a resilver, we won't resilver the data properly to the target. But | |
| 2304 * if the damage is permanent (more likely) we will resilver forever, | |
| 2305 * which isn't really acceptable. Since there is enough information for | |
| 2306 * the user to know what has failed and why, this seems like a more | |
| 2307 * tractable approach. | |
| 789 | 2308 */ |
| 1544 | 2309 complete = (error == 0); |
| 789 | 2310 |
| 1544 | 2311 dprintf("end %s to maxtxg=%llu %s, traverse=%d, %llu errors, stop=%u\n", |
| 2312 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 789 | 2313 spa->spa_scrub_maxtxg, complete ? "done" : "FAILED", |
| 2314 error, spa->spa_scrub_errors, spa->spa_scrub_stop); | |
| 2315 | |
| 2316 mutex_exit(&spa->spa_scrub_lock); | |
| 2317 | |
| 2318 /* | |
| 2319 * If the scrub/resilver completed, update all DTLs to reflect this. | |
| 2320 * Whether it succeeded or not, vacate all temporary scrub DTLs. | |
| 2321 */ | |
| 2322 vdev_dtl_reassess(rvd, spa_last_synced_txg(spa) + 1, | |
| 2323 complete ? spa->spa_scrub_maxtxg : 0, B_TRUE); | |
| 2324 vdev_scrub_stat_update(rvd, POOL_SCRUB_NONE, complete); | |
| 1544 | 2325 spa_errlog_rotate(spa); |
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2326 |
| 1544 | 2327 spa_config_exit(spa, FTAG); |
| 789 | 2328 |
| 2329 mutex_enter(&spa->spa_scrub_lock); | |
| 2330 | |
| 1544 | 2331 /* |
| 2332 * We may have finished replacing a device. | |
| 2333 * Let the async thread assess this and handle the detach. | |
| 2334 */ | |
| 2335 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); | |
| 789 | 2336 |
| 2337 /* | |
| 2338 * If we were told to restart, our final act is to start a new scrub. | |
| 2339 */ | |
| 2340 if (error == ERESTART) | |
| 1544 | 2341 spa_async_request(spa, scrub_type == POOL_SCRUB_RESILVER ? |
| 2342 SPA_ASYNC_RESILVER : SPA_ASYNC_SCRUB); | |
| 789 | 2343 |
| 1544 | 2344 spa->spa_scrub_type = POOL_SCRUB_NONE; |
| 2345 spa->spa_scrub_active = 0; | |
| 2346 spa->spa_scrub_thread = NULL; | |
| 2347 cv_broadcast(&spa->spa_scrub_cv); | |
| 789 | 2348 CALLB_CPR_EXIT(&cprinfo); /* drops &spa->spa_scrub_lock */ |
| 2349 thread_exit(); | |
| 2350 } | |
| 2351 | |
| 2352 void | |
| 2353 spa_scrub_suspend(spa_t *spa) | |
| 2354 { | |
| 2355 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2356 spa->spa_scrub_suspended++; |
| 789 | 2357 while (spa->spa_scrub_active) { |
| 2358 cv_broadcast(&spa->spa_scrub_cv); | |
| 2359 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2360 } | |
| 2361 while (spa->spa_scrub_inflight) | |
| 2362 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2363 mutex_exit(&spa->spa_scrub_lock); | |
| 2364 } | |
| 2365 | |
| 2366 void | |
| 2367 spa_scrub_resume(spa_t *spa) | |
| 2368 { | |
| 2369 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2370 ASSERT(spa->spa_scrub_suspended != 0); |
| 2371 if (--spa->spa_scrub_suspended == 0) | |
| 789 | 2372 cv_broadcast(&spa->spa_scrub_cv); |
| 2373 mutex_exit(&spa->spa_scrub_lock); | |
| 2374 } | |
| 2375 | |
| 2376 void | |
| 2377 spa_scrub_restart(spa_t *spa, uint64_t txg) | |
| 2378 { | |
| 2379 /* | |
| 2380 * Something happened (e.g. snapshot create/delete) that means | |
| 2381 * we must restart any in-progress scrubs. The itinerary will | |
| 2382 * fix this properly. | |
| 2383 */ | |
| 2384 mutex_enter(&spa->spa_scrub_lock); | |
| 2385 spa->spa_scrub_restart_txg = txg; | |
| 2386 mutex_exit(&spa->spa_scrub_lock); | |
| 2387 } | |
| 2388 | |
| 1544 | 2389 int |
| 2390 spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force) | |
| 789 | 2391 { |
| 2392 space_seg_t *ss; | |
| 2393 uint64_t mintxg, maxtxg; | |
| 2394 vdev_t *rvd = spa->spa_root_vdev; | |
| 2395 | |
| 2396 if ((uint_t)type >= POOL_SCRUB_TYPES) | |
| 2397 return (ENOTSUP); | |
| 2398 | |
| 1544 | 2399 mutex_enter(&spa->spa_scrub_lock); |
| 2400 | |
| 789 | 2401 /* |
| 2402 * If there's a scrub or resilver already in progress, stop it. | |
| 2403 */ | |
| 2404 while (spa->spa_scrub_thread != NULL) { | |
| 2405 /* | |
| 2406 * Don't stop a resilver unless forced. | |
| 2407 */ | |
| 1544 | 2408 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER && !force) { |
| 2409 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 2410 return (EBUSY); |
| 1544 | 2411 } |
| 789 | 2412 spa->spa_scrub_stop = 1; |
| 2413 cv_broadcast(&spa->spa_scrub_cv); | |
| 2414 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2415 } | |
| 2416 | |
| 2417 /* | |
| 2418 * Terminate the previous traverse. | |
| 2419 */ | |
| 2420 if (spa->spa_scrub_th != NULL) { | |
| 2421 traverse_fini(spa->spa_scrub_th); | |
| 2422 spa->spa_scrub_th = NULL; | |
| 2423 } | |
| 2424 | |
| 1544 | 2425 if (rvd == NULL) { |
| 2426 ASSERT(spa->spa_scrub_stop == 0); | |
| 2427 ASSERT(spa->spa_scrub_type == type); | |
| 2428 ASSERT(spa->spa_scrub_restart_txg == 0); | |
| 2429 mutex_exit(&spa->spa_scrub_lock); | |
| 2430 return (0); | |
| 2431 } | |
| 789 | 2432 |
| 2433 mintxg = TXG_INITIAL - 1; | |
| 2434 maxtxg = spa_last_synced_txg(spa) + 1; | |
| 2435 | |
| 1544 | 2436 mutex_enter(&rvd->vdev_dtl_lock); |
| 789 | 2437 |
| 1544 | 2438 if (rvd->vdev_dtl_map.sm_space == 0) { |
| 2439 /* | |
| 2440 * The pool-wide DTL is empty. | |
| 1732 | 2441 * If this is a resilver, there's nothing to do except |
| 2442 * check whether any in-progress replacements have completed. | |
| 1544 | 2443 */ |
| 1732 | 2444 if (type == POOL_SCRUB_RESILVER) { |
| 1544 | 2445 type = POOL_SCRUB_NONE; |
| 1732 | 2446 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); |
| 2447 } | |
| 1544 | 2448 } else { |
| 2449 /* | |
| 2450 * The pool-wide DTL is non-empty. | |
| 2451 * If this is a normal scrub, upgrade to a resilver instead. | |
| 2452 */ | |
| 2453 if (type == POOL_SCRUB_EVERYTHING) | |
| 2454 type = POOL_SCRUB_RESILVER; | |
| 2455 } | |
| 789 | 2456 |
| 1544 | 2457 if (type == POOL_SCRUB_RESILVER) { |
| 789 | 2458 /* |
| 2459 * Determine the resilvering boundaries. | |
| 2460 * | |
| 2461 * Note: (mintxg, maxtxg) is an open interval, | |
| 2462 * i.e. mintxg and maxtxg themselves are not included. | |
| 2463 * | |
| 2464 * Note: for maxtxg, we MIN with spa_last_synced_txg(spa) + 1 | |
| 2465 * so we don't claim to resilver a txg that's still changing. | |
| 2466 */ | |
| 2467 ss = avl_first(&rvd->vdev_dtl_map.sm_root); | |
| 1544 | 2468 mintxg = ss->ss_start - 1; |
| 789 | 2469 ss = avl_last(&rvd->vdev_dtl_map.sm_root); |
| 1544 | 2470 maxtxg = MIN(ss->ss_end, maxtxg); |
| 789 | 2471 } |
| 2472 | |
| 1544 | 2473 mutex_exit(&rvd->vdev_dtl_lock); |
| 2474 | |
| 2475 spa->spa_scrub_stop = 0; | |
| 2476 spa->spa_scrub_type = type; | |
| 2477 spa->spa_scrub_restart_txg = 0; | |
| 2478 | |
| 2479 if (type != POOL_SCRUB_NONE) { | |
| 2480 spa->spa_scrub_mintxg = mintxg; | |
| 789 | 2481 spa->spa_scrub_maxtxg = maxtxg; |
| 2482 spa->spa_scrub_th = traverse_init(spa, spa_scrub_cb, NULL, | |
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2483 ADVANCE_PRE | ADVANCE_PRUNE | ADVANCE_ZIL, |
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2484 ZIO_FLAG_CANFAIL); |
| 789 | 2485 traverse_add_pool(spa->spa_scrub_th, mintxg, maxtxg); |
| 2486 spa->spa_scrub_thread = thread_create(NULL, 0, | |
| 2487 spa_scrub_thread, spa, 0, &p0, TS_RUN, minclsyspri); | |
| 2488 } | |
| 2489 | |
| 1544 | 2490 mutex_exit(&spa->spa_scrub_lock); |
| 2491 | |
| 789 | 2492 return (0); |
| 2493 } | |
| 2494 | |
| 1544 | 2495 /* |
| 2496 * ========================================================================== | |
| 2497 * SPA async task processing | |
| 2498 * ========================================================================== | |
| 2499 */ | |
| 2500 | |
| 2501 static void | |
| 2502 spa_async_reopen(spa_t *spa) | |
| 789 | 2503 { |
| 1544 | 2504 vdev_t *rvd = spa->spa_root_vdev; |
| 2505 vdev_t *tvd; | |
| 2506 int c; | |
| 2507 | |
| 2508 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2509 | |
| 2510 for (c = 0; c < rvd->vdev_children; c++) { | |
| 2511 tvd = rvd->vdev_child[c]; | |
| 2512 if (tvd->vdev_reopen_wanted) { | |
| 2513 tvd->vdev_reopen_wanted = 0; | |
| 2514 vdev_reopen(tvd); | |
| 2515 } | |
| 2516 } | |
| 789 | 2517 |
| 1544 | 2518 spa_config_exit(spa, FTAG); |
| 2519 } | |
| 2520 | |
| 2521 static void | |
| 2522 spa_async_thread(spa_t *spa) | |
| 2523 { | |
| 2524 int tasks; | |
| 2525 | |
| 2526 ASSERT(spa->spa_sync_on); | |
| 789 | 2527 |
| 1544 | 2528 mutex_enter(&spa->spa_async_lock); |
| 2529 tasks = spa->spa_async_tasks; | |
| 2530 spa->spa_async_tasks = 0; | |
| 2531 mutex_exit(&spa->spa_async_lock); | |
| 2532 | |
| 2533 /* | |
|
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2534 * See if the config needs to be updated. |
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2535 */ |
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2536 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { |
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2537 mutex_enter(&spa_namespace_lock); |
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2538 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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2539 mutex_exit(&spa_namespace_lock); |
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2540 } |
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2541 |
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2542 /* |
| 1544 | 2543 * See if any devices need to be reopened. |
| 2544 */ | |
| 2545 if (tasks & SPA_ASYNC_REOPEN) | |
| 2546 spa_async_reopen(spa); | |
| 2547 | |
| 2548 /* | |
| 2549 * If any devices are done replacing, detach them. | |
| 2550 */ | |
| 2551 if (tasks & SPA_ASYNC_REPLACE_DONE) | |
| 789 | 2552 spa_vdev_replace_done(spa); |
| 2553 | |
| 1544 | 2554 /* |
| 2555 * Kick off a scrub. | |
| 2556 */ | |
| 2557 if (tasks & SPA_ASYNC_SCRUB) | |
| 2558 VERIFY(spa_scrub(spa, POOL_SCRUB_EVERYTHING, B_TRUE) == 0); | |
| 2559 | |
| 2560 /* | |
| 2561 * Kick off a resilver. | |
| 2562 */ | |
| 2563 if (tasks & SPA_ASYNC_RESILVER) | |
| 2564 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 2565 | |
| 2566 /* | |
| 2567 * Let the world know that we're done. | |
| 2568 */ | |
| 2569 mutex_enter(&spa->spa_async_lock); | |
| 2570 spa->spa_async_thread = NULL; | |
| 2571 cv_broadcast(&spa->spa_async_cv); | |
| 2572 mutex_exit(&spa->spa_async_lock); | |
| 2573 thread_exit(); | |
| 2574 } | |
| 2575 | |
| 2576 void | |
| 2577 spa_async_suspend(spa_t *spa) | |
| 2578 { | |
| 2579 mutex_enter(&spa->spa_async_lock); | |
| 2580 spa->spa_async_suspended++; | |
| 2581 while (spa->spa_async_thread != NULL) | |
| 2582 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); | |
| 2583 mutex_exit(&spa->spa_async_lock); | |
| 2584 } | |
| 2585 | |
| 2586 void | |
| 2587 spa_async_resume(spa_t *spa) | |
| 2588 { | |
| 2589 mutex_enter(&spa->spa_async_lock); | |
| 2590 ASSERT(spa->spa_async_suspended != 0); | |
| 2591 spa->spa_async_suspended--; | |
| 2592 mutex_exit(&spa->spa_async_lock); | |
| 2593 } | |
| 2594 | |
| 2595 static void | |
| 2596 spa_async_dispatch(spa_t *spa) | |
| 2597 { | |
| 2598 mutex_enter(&spa->spa_async_lock); | |
| 2599 if (spa->spa_async_tasks && !spa->spa_async_suspended && | |
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2600 spa->spa_async_thread == NULL && |
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2601 rootdir != NULL && !vn_is_readonly(rootdir)) |
| 1544 | 2602 spa->spa_async_thread = thread_create(NULL, 0, |
| 2603 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); | |
| 2604 mutex_exit(&spa->spa_async_lock); | |
| 2605 } | |
| 2606 | |
| 2607 void | |
| 2608 spa_async_request(spa_t *spa, int task) | |
| 2609 { | |
| 2610 mutex_enter(&spa->spa_async_lock); | |
| 2611 spa->spa_async_tasks |= task; | |
| 2612 mutex_exit(&spa->spa_async_lock); | |
| 789 | 2613 } |
| 2614 | |
| 2615 /* | |
| 2616 * ========================================================================== | |
| 2617 * SPA syncing routines | |
| 2618 * ========================================================================== | |
| 2619 */ | |
| 2620 | |
| 2621 static void | |
| 2622 spa_sync_deferred_frees(spa_t *spa, uint64_t txg) | |
| 2623 { | |
| 2624 bplist_t *bpl = &spa->spa_sync_bplist; | |
| 2625 dmu_tx_t *tx; | |
| 2626 blkptr_t blk; | |
| 2627 uint64_t itor = 0; | |
| 2628 zio_t *zio; | |
| 2629 int error; | |
| 2630 uint8_t c = 1; | |
| 2631 | |
| 2632 zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CONFIG_HELD); | |
| 2633 | |
| 2634 while (bplist_iterate(bpl, &itor, &blk) == 0) | |
| 2635 zio_nowait(zio_free(zio, spa, txg, &blk, NULL, NULL)); | |
| 2636 | |
| 2637 error = zio_wait(zio); | |
| 2638 ASSERT3U(error, ==, 0); | |
| 2639 | |
| 2640 tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
| 2641 bplist_vacate(bpl, tx); | |
| 2642 | |
| 2643 /* | |
| 2644 * Pre-dirty the first block so we sync to convergence faster. | |
| 2645 * (Usually only the first block is needed.) | |
| 2646 */ | |
| 2647 dmu_write(spa->spa_meta_objset, spa->spa_sync_bplist_obj, 0, 1, &c, tx); | |
| 2648 dmu_tx_commit(tx); | |
| 2649 } | |
| 2650 | |
| 2651 static void | |
| 2082 | 2652 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) |
| 2653 { | |
| 2654 char *packed = NULL; | |
| 2655 size_t nvsize = 0; | |
| 2656 dmu_buf_t *db; | |
| 2657 | |
| 2658 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); | |
| 2659 | |
| 2660 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 2661 | |
| 2662 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, | |
| 2663 KM_SLEEP) == 0); | |
| 2664 | |
| 2665 dmu_write(spa->spa_meta_objset, obj, 0, nvsize, packed, tx); | |
| 2666 | |
| 2667 kmem_free(packed, nvsize); | |
| 2668 | |
| 2669 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 2670 dmu_buf_will_dirty(db, tx); | |
| 2671 *(uint64_t *)db->db_data = nvsize; | |
| 2672 dmu_buf_rele(db, FTAG); | |
| 2673 } | |
| 2674 | |
| 2675 static void | |
| 2676 spa_sync_spares(spa_t *spa, dmu_tx_t *tx) | |
| 2677 { | |
| 2678 nvlist_t *nvroot; | |
| 2679 nvlist_t **spares; | |
| 2680 int i; | |
| 2681 | |
| 2682 if (!spa->spa_sync_spares) | |
| 2683 return; | |
| 2684 | |
| 2685 /* | |
| 2686 * Update the MOS nvlist describing the list of available spares. | |
| 2687 * spa_validate_spares() will have already made sure this nvlist is | |
| 2688 * valid and the vdevs are labelled appropriately. | |
| 2689 */ | |
| 2690 if (spa->spa_spares_object == 0) { | |
| 2691 spa->spa_spares_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 2692 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 2693 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 2694 VERIFY(zap_update(spa->spa_meta_objset, | |
| 2695 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SPARES, | |
| 2696 sizeof (uint64_t), 1, &spa->spa_spares_object, tx) == 0); | |
| 2697 } | |
| 2698 | |
| 2699 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 2700 if (spa->spa_nspares == 0) { | |
| 2701 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2702 NULL, 0) == 0); | |
| 2703 } else { | |
| 2704 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), | |
| 2705 KM_SLEEP); | |
| 2706 for (i = 0; i < spa->spa_nspares; i++) | |
| 2707 spares[i] = vdev_config_generate(spa, | |
| 2708 spa->spa_spares[i], B_FALSE, B_TRUE); | |
| 2709 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2710 spares, spa->spa_nspares) == 0); | |
| 2711 for (i = 0; i < spa->spa_nspares; i++) | |
| 2712 nvlist_free(spares[i]); | |
| 2713 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 2714 } | |
| 2715 | |
| 2716 spa_sync_nvlist(spa, spa->spa_spares_object, nvroot, tx); | |
| 2717 | |
| 2718 spa->spa_sync_spares = B_FALSE; | |
| 2719 } | |
| 2720 | |
| 2721 static void | |
| 789 | 2722 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) |
| 2723 { | |
| 2724 nvlist_t *config; | |
| 2725 | |
| 2726 if (list_is_empty(&spa->spa_dirty_list)) | |
| 2727 return; | |
| 2728 | |
| 2729 config = spa_config_generate(spa, NULL, dmu_tx_get_txg(tx), B_FALSE); | |
| 2730 | |
|
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2731 if (spa->spa_config_syncing) |
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2732 nvlist_free(spa->spa_config_syncing); |
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2733 spa->spa_config_syncing = config; |
| 789 | 2734 |
| 2082 | 2735 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); |
| 789 | 2736 } |
| 2737 | |
| 2738 /* | |
| 2739 * Sync the specified transaction group. New blocks may be dirtied as | |
| 2740 * part of the process, so we iterate until it converges. | |
| 2741 */ | |
| 2742 void | |
| 2743 spa_sync(spa_t *spa, uint64_t txg) | |
| 2744 { | |
| 2745 dsl_pool_t *dp = spa->spa_dsl_pool; | |
| 2746 objset_t *mos = spa->spa_meta_objset; | |
| 2747 bplist_t *bpl = &spa->spa_sync_bplist; | |
|
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2748 vdev_t *rvd = spa->spa_root_vdev; |
| 789 | 2749 vdev_t *vd; |
| 2750 dmu_tx_t *tx; | |
| 2751 int dirty_vdevs; | |
| 2752 | |
| 2753 /* | |
| 2754 * Lock out configuration changes. | |
| 2755 */ | |
| 1544 | 2756 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2757 |
| 2758 spa->spa_syncing_txg = txg; | |
| 2759 spa->spa_sync_pass = 0; | |
| 2760 | |
| 1544 | 2761 VERIFY(0 == bplist_open(bpl, mos, spa->spa_sync_bplist_obj)); |
| 789 | 2762 |
| 2082 | 2763 tx = dmu_tx_create_assigned(dp, txg); |
| 2764 | |
| 2765 /* | |
| 2766 * If we are upgrading to ZFS_VERSION_RAIDZ_DEFLATE this txg, | |
| 2767 * set spa_deflate if we have no raid-z vdevs. | |
| 2768 */ | |
| 2769 if (spa->spa_ubsync.ub_version < ZFS_VERSION_RAIDZ_DEFLATE && | |
| 2770 spa->spa_uberblock.ub_version >= ZFS_VERSION_RAIDZ_DEFLATE) { | |
| 2771 int i; | |
| 2772 | |
| 2773 for (i = 0; i < rvd->vdev_children; i++) { | |
| 2774 vd = rvd->vdev_child[i]; | |
| 2775 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) | |
| 2776 break; | |
| 2777 } | |
| 2778 if (i == rvd->vdev_children) { | |
| 2779 spa->spa_deflate = TRUE; | |
| 2780 VERIFY(0 == zap_add(spa->spa_meta_objset, | |
| 2781 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 2782 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); | |
| 2783 } | |
| 2784 } | |
| 2785 | |
| 789 | 2786 /* |
| 2787 * If anything has changed in this txg, push the deferred frees | |
| 2788 * from the previous txg. If not, leave them alone so that we | |
| 2789 * don't generate work on an otherwise idle system. | |
| 2790 */ | |
| 2791 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || | |
|
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2792 !txg_list_empty(&dp->dp_dirty_dirs, txg) || |
|
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2793 !txg_list_empty(&dp->dp_sync_tasks, txg)) |
| 789 | 2794 spa_sync_deferred_frees(spa, txg); |
| 2795 | |
| 2796 /* | |
| 2797 * Iterate to convergence. | |
| 2798 */ | |
| 2799 do { | |
| 2800 spa->spa_sync_pass++; | |
| 2801 | |
| 2802 spa_sync_config_object(spa, tx); | |
| 2082 | 2803 spa_sync_spares(spa, tx); |
| 1544 | 2804 spa_errlog_sync(spa, txg); |
| 789 | 2805 dsl_pool_sync(dp, txg); |
| 2806 | |
| 2807 dirty_vdevs = 0; | |
| 2808 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) { | |
| 2809 vdev_sync(vd, txg); | |
| 2810 dirty_vdevs++; | |
| 2811 } | |
| 2812 | |
| 2813 bplist_sync(bpl, tx); | |
| 2814 } while (dirty_vdevs); | |
| 2815 | |
| 2816 bplist_close(bpl); | |
| 2817 | |
| 2818 dprintf("txg %llu passes %d\n", txg, spa->spa_sync_pass); | |
| 2819 | |
| 2820 /* | |
| 2821 * Rewrite the vdev configuration (which includes the uberblock) | |
| 2822 * to commit the transaction group. | |
|
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2823 * |
|
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2824 * If there are any dirty vdevs, sync the uberblock to all vdevs. |
|
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2825 * Otherwise, pick a random top-level vdev that's known to be |
|
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2826 * visible in the config cache (see spa_vdev_add() for details). |
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2827 * If the write fails, try the next vdev until we're tried them all. |
| 789 | 2828 */ |
|
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2829 if (!list_is_empty(&spa->spa_dirty_list)) { |
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2830 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2831 } else { |
|
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2832 int children = rvd->vdev_children; |
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2833 int c0 = spa_get_random(children); |
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2834 int c; |
|
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2835 |
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2836 for (c = 0; c < children; c++) { |
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2837 vd = rvd->vdev_child[(c0 + c) % children]; |
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2838 if (vd->vdev_ms_array == 0) |
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2839 continue; |
|
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2840 if (vdev_config_sync(vd, txg) == 0) |
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2841 break; |
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2842 } |
|
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2843 if (c == children) |
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2844 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2845 } |
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2846 |
| 2082 | 2847 dmu_tx_commit(tx); |
| 2848 | |
|
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2849 /* |
|
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2850 * Clear the dirty config list. |
|
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2851 */ |
|
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2852 while ((vd = list_head(&spa->spa_dirty_list)) != NULL) |
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2853 vdev_config_clean(vd); |
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2854 |
|
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2855 /* |
|
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2856 * Now that the new config has synced transactionally, |
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2857 * let it become visible to the config cache. |
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2858 */ |
|
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2859 if (spa->spa_config_syncing != NULL) { |
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2860 spa_config_set(spa, spa->spa_config_syncing); |
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2861 spa->spa_config_txg = txg; |
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2862 spa->spa_config_syncing = NULL; |
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2863 } |
| 789 | 2864 |
| 2865 /* | |
| 2866 * Make a stable copy of the fully synced uberblock. | |
| 2867 * We use this as the root for pool traversals. | |
| 2868 */ | |
| 2869 spa->spa_traverse_wanted = 1; /* tells traverse_more() to stop */ | |
| 2870 | |
| 2871 spa_scrub_suspend(spa); /* stop scrubbing and finish I/Os */ | |
| 2872 | |
| 2873 rw_enter(&spa->spa_traverse_lock, RW_WRITER); | |
| 2874 spa->spa_traverse_wanted = 0; | |
| 2875 spa->spa_ubsync = spa->spa_uberblock; | |
| 2876 rw_exit(&spa->spa_traverse_lock); | |
| 2877 | |
| 2878 spa_scrub_resume(spa); /* resume scrub with new ubsync */ | |
| 2879 | |
| 2880 /* | |
| 2881 * Clean up the ZIL records for the synced txg. | |
| 2882 */ | |
| 2883 dsl_pool_zil_clean(dp); | |
| 2884 | |
| 2885 /* | |
| 2886 * Update usable space statistics. | |
| 2887 */ | |
| 2888 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) | |
| 2889 vdev_sync_done(vd, txg); | |
| 2890 | |
| 2891 /* | |
| 2892 * It had better be the case that we didn't dirty anything | |
| 2082 | 2893 * since vdev_config_sync(). |
| 789 | 2894 */ |
| 2895 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); | |
| 2896 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); | |
| 2897 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); | |
| 2898 ASSERT(bpl->bpl_queue == NULL); | |
| 2899 | |
| 1544 | 2900 spa_config_exit(spa, FTAG); |
| 2901 | |
| 2902 /* | |
| 2903 * If any async tasks have been requested, kick them off. | |
| 2904 */ | |
| 2905 spa_async_dispatch(spa); | |
| 789 | 2906 } |
| 2907 | |
| 2908 /* | |
| 2909 * Sync all pools. We don't want to hold the namespace lock across these | |
| 2910 * operations, so we take a reference on the spa_t and drop the lock during the | |
| 2911 * sync. | |
| 2912 */ | |
| 2913 void | |
| 2914 spa_sync_allpools(void) | |
| 2915 { | |
| 2916 spa_t *spa = NULL; | |
| 2917 mutex_enter(&spa_namespace_lock); | |
| 2918 while ((spa = spa_next(spa)) != NULL) { | |
| 2919 if (spa_state(spa) != POOL_STATE_ACTIVE) | |
| 2920 continue; | |
| 2921 spa_open_ref(spa, FTAG); | |
| 2922 mutex_exit(&spa_namespace_lock); | |
| 2923 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 2924 mutex_enter(&spa_namespace_lock); | |
| 2925 spa_close(spa, FTAG); | |
| 2926 } | |
| 2927 mutex_exit(&spa_namespace_lock); | |
| 2928 } | |
| 2929 | |
| 2930 /* | |
| 2931 * ========================================================================== | |
| 2932 * Miscellaneous routines | |
| 2933 * ========================================================================== | |
| 2934 */ | |
| 2935 | |
| 2936 /* | |
| 2937 * Remove all pools in the system. | |
| 2938 */ | |
| 2939 void | |
| 2940 spa_evict_all(void) | |
| 2941 { | |
| 2942 spa_t *spa; | |
| 2943 | |
| 2944 /* | |
| 2945 * Remove all cached state. All pools should be closed now, | |
| 2946 * so every spa in the AVL tree should be unreferenced. | |
| 2947 */ | |
| 2948 mutex_enter(&spa_namespace_lock); | |
| 2949 while ((spa = spa_next(NULL)) != NULL) { | |
| 2950 /* | |
| 1544 | 2951 * Stop async tasks. The async thread may need to detach |
| 2952 * a device that's been replaced, which requires grabbing | |
| 2953 * spa_namespace_lock, so we must drop it here. | |
| 789 | 2954 */ |
| 2955 spa_open_ref(spa, FTAG); | |
| 2956 mutex_exit(&spa_namespace_lock); | |
| 1544 | 2957 spa_async_suspend(spa); |
| 789 | 2958 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); |
| 2959 mutex_enter(&spa_namespace_lock); | |
| 2960 spa_close(spa, FTAG); | |
| 2961 | |
| 2962 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 2963 spa_unload(spa); | |
| 2964 spa_deactivate(spa); | |
| 2965 } | |
| 2966 spa_remove(spa); | |
| 2967 } | |
| 2968 mutex_exit(&spa_namespace_lock); | |
| 2969 } | |
| 1544 | 2970 |
| 2971 vdev_t * | |
| 2972 spa_lookup_by_guid(spa_t *spa, uint64_t guid) | |
| 2973 { | |
| 2974 return (vdev_lookup_by_guid(spa->spa_root_vdev, guid)); | |
| 2975 } | |
| 1760 | 2976 |
| 2977 void | |
| 2978 spa_upgrade(spa_t *spa) | |
| 2979 { | |
| 2980 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2981 | |
| 2982 /* | |
| 2983 * This should only be called for a non-faulted pool, and since a | |
| 2984 * future version would result in an unopenable pool, this shouldn't be | |
| 2985 * possible. | |
| 2986 */ | |
| 2987 ASSERT(spa->spa_uberblock.ub_version <= ZFS_VERSION); | |
| 2988 | |
| 2989 spa->spa_uberblock.ub_version = ZFS_VERSION; | |
| 2990 vdev_config_dirty(spa->spa_root_vdev); | |
| 2991 | |
| 2992 spa_config_exit(spa, FTAG); | |
| 2082 | 2993 |
| 2994 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 1760 | 2995 } |
| 2082 | 2996 |
| 2997 boolean_t | |
| 2998 spa_has_spare(spa_t *spa, uint64_t guid) | |
| 2999 { | |
| 3000 int i; | |
| 3001 | |
| 3002 for (i = 0; i < spa->spa_nspares; i++) | |
| 3003 if (spa->spa_spares[i]->vdev_guid == guid) | |
| 3004 return (B_TRUE); | |
| 3005 | |
| 3006 return (B_FALSE); | |
| 3007 } |