Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/spa.c @ 2082:76b439ec3ac1
PSARC 2006/223 ZFS Hot Spares
PSARC 2006/303 ZFS Clone Promotion
6276916 support for "clone swap"
6288488 du reports misleading size on RAID-Z
6393490 libzfs should be a real library
6397148 fbufs debug code should be removed from buf_hash_insert()
6405966 Hot Spare support in ZFS
6409302 passing a non-root vdev via zpool_create() panics system
6415739 assertion failed: !(zio->io_flags & 0x00040)
6416759 ::dbufs does not find bonus buffers anymore
6417978 double parity RAID-Z a.k.a. RAID6
6424554 full block re-writes need not read data in
6425111 detaching an offline device can result in import confusion
| author | eschrock |
|---|---|
| date | Tue, 30 May 2006 15:47:16 -0700 |
| parents | 628267397204 |
| children | 73de7a781492 |
| rev | line source |
|---|---|
| 789 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
| 1544 | 5 * Common Development and Distribution License (the "License"). |
| 6 * You may not use this file except in compliance with the License. | |
| 789 | 7 * |
| 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 2082 | 21 |
| 789 | 22 /* |
|
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23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. |
| 789 | 24 * Use is subject to license terms. |
| 25 */ | |
| 26 | |
| 27 #pragma ident "%Z%%M% %I% %E% SMI" | |
| 28 | |
| 29 /* | |
| 30 * This file contains all the routines used when modifying on-disk SPA state. | |
| 31 * This includes opening, importing, destroying, exporting a pool, and syncing a | |
| 32 * pool. | |
| 33 */ | |
| 34 | |
| 35 #include <sys/zfs_context.h> | |
| 1544 | 36 #include <sys/fm/fs/zfs.h> |
| 789 | 37 #include <sys/spa_impl.h> |
| 38 #include <sys/zio.h> | |
| 39 #include <sys/zio_checksum.h> | |
| 40 #include <sys/zio_compress.h> | |
| 41 #include <sys/dmu.h> | |
| 42 #include <sys/dmu_tx.h> | |
| 43 #include <sys/zap.h> | |
| 44 #include <sys/zil.h> | |
| 45 #include <sys/vdev_impl.h> | |
| 46 #include <sys/metaslab.h> | |
| 47 #include <sys/uberblock_impl.h> | |
| 48 #include <sys/txg.h> | |
| 49 #include <sys/avl.h> | |
| 50 #include <sys/dmu_traverse.h> | |
| 51 #include <sys/unique.h> | |
| 52 #include <sys/dsl_pool.h> | |
| 53 #include <sys/dsl_dir.h> | |
| 54 #include <sys/dsl_prop.h> | |
| 55 #include <sys/fs/zfs.h> | |
| 56 #include <sys/callb.h> | |
| 57 | |
| 58 /* | |
| 59 * ========================================================================== | |
| 60 * SPA state manipulation (open/create/destroy/import/export) | |
| 61 * ========================================================================== | |
| 62 */ | |
| 63 | |
| 1544 | 64 static int |
| 65 spa_error_entry_compare(const void *a, const void *b) | |
| 66 { | |
| 67 spa_error_entry_t *sa = (spa_error_entry_t *)a; | |
| 68 spa_error_entry_t *sb = (spa_error_entry_t *)b; | |
| 69 int ret; | |
| 70 | |
| 71 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, | |
| 72 sizeof (zbookmark_t)); | |
| 73 | |
| 74 if (ret < 0) | |
| 75 return (-1); | |
| 76 else if (ret > 0) | |
| 77 return (1); | |
| 78 else | |
| 79 return (0); | |
| 80 } | |
| 81 | |
| 82 /* | |
| 83 * Utility function which retrieves copies of the current logs and | |
| 84 * re-initializes them in the process. | |
| 85 */ | |
| 86 void | |
| 87 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) | |
| 88 { | |
| 89 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); | |
| 90 | |
| 91 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); | |
| 92 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); | |
| 93 | |
| 94 avl_create(&spa->spa_errlist_scrub, | |
| 95 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 96 offsetof(spa_error_entry_t, se_avl)); | |
| 97 avl_create(&spa->spa_errlist_last, | |
| 98 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 99 offsetof(spa_error_entry_t, se_avl)); | |
| 100 } | |
| 101 | |
| 789 | 102 /* |
| 103 * Activate an uninitialized pool. | |
| 104 */ | |
| 105 static void | |
| 106 spa_activate(spa_t *spa) | |
| 107 { | |
| 108 int t; | |
| 109 | |
| 110 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); | |
| 111 | |
| 112 spa->spa_state = POOL_STATE_ACTIVE; | |
| 113 | |
| 114 spa->spa_normal_class = metaslab_class_create(); | |
| 115 | |
| 116 for (t = 0; t < ZIO_TYPES; t++) { | |
| 117 spa->spa_zio_issue_taskq[t] = taskq_create("spa_zio_issue", | |
| 118 8, maxclsyspri, 50, INT_MAX, | |
| 119 TASKQ_PREPOPULATE); | |
| 120 spa->spa_zio_intr_taskq[t] = taskq_create("spa_zio_intr", | |
| 121 8, maxclsyspri, 50, INT_MAX, | |
| 122 TASKQ_PREPOPULATE); | |
| 123 } | |
| 124 | |
| 125 rw_init(&spa->spa_traverse_lock, NULL, RW_DEFAULT, NULL); | |
| 126 | |
| 127 list_create(&spa->spa_dirty_list, sizeof (vdev_t), | |
| 128 offsetof(vdev_t, vdev_dirty_node)); | |
| 129 | |
| 130 txg_list_create(&spa->spa_vdev_txg_list, | |
| 131 offsetof(struct vdev, vdev_txg_node)); | |
| 1544 | 132 |
| 133 avl_create(&spa->spa_errlist_scrub, | |
| 134 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 135 offsetof(spa_error_entry_t, se_avl)); | |
| 136 avl_create(&spa->spa_errlist_last, | |
| 137 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 138 offsetof(spa_error_entry_t, se_avl)); | |
| 789 | 139 } |
| 140 | |
| 141 /* | |
| 142 * Opposite of spa_activate(). | |
| 143 */ | |
| 144 static void | |
| 145 spa_deactivate(spa_t *spa) | |
| 146 { | |
| 147 int t; | |
| 148 | |
| 149 ASSERT(spa->spa_sync_on == B_FALSE); | |
| 150 ASSERT(spa->spa_dsl_pool == NULL); | |
| 151 ASSERT(spa->spa_root_vdev == NULL); | |
| 152 | |
| 153 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); | |
| 154 | |
| 155 txg_list_destroy(&spa->spa_vdev_txg_list); | |
| 156 | |
| 157 list_destroy(&spa->spa_dirty_list); | |
| 158 | |
| 159 rw_destroy(&spa->spa_traverse_lock); | |
| 160 | |
| 161 for (t = 0; t < ZIO_TYPES; t++) { | |
| 162 taskq_destroy(spa->spa_zio_issue_taskq[t]); | |
| 163 taskq_destroy(spa->spa_zio_intr_taskq[t]); | |
| 164 spa->spa_zio_issue_taskq[t] = NULL; | |
| 165 spa->spa_zio_intr_taskq[t] = NULL; | |
| 166 } | |
| 167 | |
| 168 metaslab_class_destroy(spa->spa_normal_class); | |
| 169 spa->spa_normal_class = NULL; | |
| 170 | |
| 1544 | 171 /* |
| 172 * If this was part of an import or the open otherwise failed, we may | |
| 173 * still have errors left in the queues. Empty them just in case. | |
| 174 */ | |
| 175 spa_errlog_drain(spa); | |
| 176 | |
| 177 avl_destroy(&spa->spa_errlist_scrub); | |
| 178 avl_destroy(&spa->spa_errlist_last); | |
| 179 | |
| 789 | 180 spa->spa_state = POOL_STATE_UNINITIALIZED; |
| 181 } | |
| 182 | |
| 183 /* | |
| 184 * Verify a pool configuration, and construct the vdev tree appropriately. This | |
| 185 * will create all the necessary vdevs in the appropriate layout, with each vdev | |
| 186 * in the CLOSED state. This will prep the pool before open/creation/import. | |
| 187 * All vdev validation is done by the vdev_alloc() routine. | |
| 188 */ | |
| 2082 | 189 static int |
| 190 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, | |
| 191 uint_t id, int atype) | |
| 789 | 192 { |
| 193 nvlist_t **child; | |
| 194 uint_t c, children; | |
| 2082 | 195 int error; |
| 196 | |
| 197 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) | |
| 198 return (error); | |
| 199 | |
| 200 if ((*vdp)->vdev_ops->vdev_op_leaf) | |
| 201 return (0); | |
| 789 | 202 |
| 203 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
| 204 &child, &children) != 0) { | |
| 2082 | 205 vdev_free(*vdp); |
| 206 *vdp = NULL; | |
| 207 return (EINVAL); | |
| 789 | 208 } |
| 209 | |
| 210 for (c = 0; c < children; c++) { | |
| 2082 | 211 vdev_t *vd; |
| 212 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, | |
| 213 atype)) != 0) { | |
| 214 vdev_free(*vdp); | |
| 215 *vdp = NULL; | |
| 216 return (error); | |
| 789 | 217 } |
| 218 } | |
| 219 | |
| 2082 | 220 ASSERT(*vdp != NULL); |
| 221 | |
| 222 return (0); | |
| 789 | 223 } |
| 224 | |
| 225 /* | |
| 226 * Opposite of spa_load(). | |
| 227 */ | |
| 228 static void | |
| 229 spa_unload(spa_t *spa) | |
| 230 { | |
| 2082 | 231 int i; |
| 232 | |
| 789 | 233 /* |
| 1544 | 234 * Stop async tasks. |
| 235 */ | |
| 236 spa_async_suspend(spa); | |
| 237 | |
| 238 /* | |
| 789 | 239 * Stop syncing. |
| 240 */ | |
| 241 if (spa->spa_sync_on) { | |
| 242 txg_sync_stop(spa->spa_dsl_pool); | |
| 243 spa->spa_sync_on = B_FALSE; | |
| 244 } | |
| 245 | |
| 246 /* | |
| 247 * Wait for any outstanding prefetch I/O to complete. | |
| 248 */ | |
| 1544 | 249 spa_config_enter(spa, RW_WRITER, FTAG); |
| 250 spa_config_exit(spa, FTAG); | |
| 789 | 251 |
| 252 /* | |
| 253 * Close the dsl pool. | |
| 254 */ | |
| 255 if (spa->spa_dsl_pool) { | |
| 256 dsl_pool_close(spa->spa_dsl_pool); | |
| 257 spa->spa_dsl_pool = NULL; | |
| 258 } | |
| 259 | |
| 260 /* | |
| 261 * Close all vdevs. | |
| 262 */ | |
|
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263 if (spa->spa_root_vdev) |
| 789 | 264 vdev_free(spa->spa_root_vdev); |
|
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265 ASSERT(spa->spa_root_vdev == NULL); |
| 1544 | 266 |
| 2082 | 267 for (i = 0; i < spa->spa_nspares; i++) |
| 268 vdev_free(spa->spa_spares[i]); | |
| 269 if (spa->spa_spares) { | |
| 270 kmem_free(spa->spa_spares, spa->spa_nspares * sizeof (void *)); | |
| 271 spa->spa_spares = NULL; | |
| 272 } | |
| 273 if (spa->spa_sparelist) { | |
| 274 nvlist_free(spa->spa_sparelist); | |
| 275 spa->spa_sparelist = NULL; | |
| 276 } | |
| 277 | |
| 1544 | 278 spa->spa_async_suspended = 0; |
| 789 | 279 } |
| 280 | |
| 281 /* | |
| 2082 | 282 * Load (or re-load) the current list of vdevs describing the active spares for |
| 283 * this pool. When this is called, we have some form of basic information in | |
| 284 * 'spa_sparelist'. We parse this into vdevs, try to open them, and then | |
| 285 * re-generate a more complete list including status information. | |
| 286 */ | |
| 287 static void | |
| 288 spa_load_spares(spa_t *spa) | |
| 289 { | |
| 290 nvlist_t **spares; | |
| 291 uint_t nspares; | |
| 292 int i; | |
| 293 | |
| 294 /* | |
| 295 * First, close and free any existing spare vdevs. | |
| 296 */ | |
| 297 for (i = 0; i < spa->spa_nspares; i++) { | |
| 298 vdev_close(spa->spa_spares[i]); | |
| 299 vdev_free(spa->spa_spares[i]); | |
| 300 } | |
| 301 if (spa->spa_spares) | |
| 302 kmem_free(spa->spa_spares, spa->spa_nspares * sizeof (void *)); | |
| 303 | |
| 304 if (spa->spa_sparelist == NULL) | |
| 305 nspares = 0; | |
| 306 else | |
| 307 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 308 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 309 | |
| 310 spa->spa_nspares = (int)nspares; | |
| 311 spa->spa_spares = NULL; | |
| 312 | |
| 313 if (nspares == 0) | |
| 314 return; | |
| 315 | |
| 316 /* | |
| 317 * Construct the array of vdevs, opening them to get status in the | |
| 318 * process. | |
| 319 */ | |
| 320 spa->spa_spares = kmem_alloc(nspares * sizeof (void *), KM_SLEEP); | |
| 321 for (i = 0; i < spa->spa_nspares; i++) { | |
| 322 vdev_t *vd; | |
| 323 | |
| 324 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 325 VDEV_ALLOC_SPARE) == 0); | |
| 326 ASSERT(vd != NULL); | |
| 327 | |
| 328 spa->spa_spares[i] = vd; | |
| 329 | |
| 330 if (vdev_open(vd) != 0) | |
| 331 continue; | |
| 332 | |
| 333 vd->vdev_top = vd; | |
| 334 (void) vdev_validate_spare(vd); | |
| 335 } | |
| 336 | |
| 337 /* | |
| 338 * Recompute the stashed list of spares, with status information | |
| 339 * this time. | |
| 340 */ | |
| 341 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 342 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 343 | |
| 344 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), KM_SLEEP); | |
| 345 for (i = 0; i < spa->spa_nspares; i++) | |
| 346 spares[i] = vdev_config_generate(spa, spa->spa_spares[i], | |
| 347 B_TRUE, B_TRUE); | |
| 348 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 349 spares, spa->spa_nspares) == 0); | |
| 350 for (i = 0; i < spa->spa_nspares; i++) | |
| 351 nvlist_free(spares[i]); | |
| 352 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 353 } | |
| 354 | |
| 355 static int | |
| 356 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) | |
| 357 { | |
| 358 dmu_buf_t *db; | |
| 359 char *packed = NULL; | |
| 360 size_t nvsize = 0; | |
| 361 int error; | |
| 362 *value = NULL; | |
| 363 | |
| 364 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 365 nvsize = *(uint64_t *)db->db_data; | |
| 366 dmu_buf_rele(db, FTAG); | |
| 367 | |
| 368 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 369 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed); | |
| 370 if (error == 0) | |
| 371 error = nvlist_unpack(packed, nvsize, value, 0); | |
| 372 kmem_free(packed, nvsize); | |
| 373 | |
| 374 return (error); | |
| 375 } | |
| 376 | |
| 377 /* | |
| 789 | 378 * Load an existing storage pool, using the pool's builtin spa_config as a |
| 1544 | 379 * source of configuration information. |
| 789 | 380 */ |
| 381 static int | |
| 1544 | 382 spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) |
| 789 | 383 { |
| 384 int error = 0; | |
| 385 nvlist_t *nvroot = NULL; | |
| 386 vdev_t *rvd; | |
| 387 uberblock_t *ub = &spa->spa_uberblock; | |
|
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388 uint64_t config_cache_txg = spa->spa_config_txg; |
| 789 | 389 uint64_t pool_guid; |
| 2082 | 390 uint64_t version; |
| 789 | 391 zio_t *zio; |
| 392 | |
| 1544 | 393 spa->spa_load_state = state; |
|
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394 |
| 789 | 395 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || |
| 1733 | 396 nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) { |
| 1544 | 397 error = EINVAL; |
| 398 goto out; | |
| 399 } | |
| 789 | 400 |
| 2082 | 401 /* |
| 402 * Versioning wasn't explicitly added to the label until later, so if | |
| 403 * it's not present treat it as the initial version. | |
| 404 */ | |
| 405 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, &version) != 0) | |
| 406 version = ZFS_VERSION_INITIAL; | |
| 407 | |
| 1733 | 408 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, |
| 409 &spa->spa_config_txg); | |
| 410 | |
|
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411 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && |
| 1544 | 412 spa_guid_exists(pool_guid, 0)) { |
| 413 error = EEXIST; | |
| 414 goto out; | |
| 415 } | |
| 789 | 416 |
| 417 /* | |
| 2082 | 418 * Parse the configuration into a vdev tree. We explicitly set the |
| 419 * value that will be returned by spa_version() since parsing the | |
| 420 * configuration requires knowing the version number. | |
| 789 | 421 */ |
| 1544 | 422 spa_config_enter(spa, RW_WRITER, FTAG); |
| 2082 | 423 spa->spa_ubsync.ub_version = version; |
| 424 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_LOAD); | |
| 1544 | 425 spa_config_exit(spa, FTAG); |
| 789 | 426 |
| 2082 | 427 if (error != 0) |
| 1544 | 428 goto out; |
| 789 | 429 |
|
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diff
changeset
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430 ASSERT(spa->spa_root_vdev == rvd); |
| 789 | 431 ASSERT(spa_guid(spa) == pool_guid); |
| 432 | |
| 433 /* | |
| 434 * Try to open all vdevs, loading each label in the process. | |
| 435 */ | |
| 1544 | 436 if (vdev_open(rvd) != 0) { |
| 437 error = ENXIO; | |
| 438 goto out; | |
| 439 } | |
| 789 | 440 |
| 441 /* | |
|
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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1807
diff
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442 * 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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changeset
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443 * lock because all label I/O is done with the ZIO_FLAG_CONFIG_HELD |
|
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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444 * flag. |
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445 */ |
|
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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diff
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446 spa_config_enter(spa, RW_READER, FTAG); |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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447 error = vdev_validate(rvd); |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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448 spa_config_exit(spa, FTAG); |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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449 |
|
628267397204
6424405 zpool import destroyed_pool can damage existing pool using same devices
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450 if (error != 0) { |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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451 error = EBADF; |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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452 goto out; |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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453 } |
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6424405 zpool import destroyed_pool can damage existing pool using same devices
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diff
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|
454 |
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455 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
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456 error = ENXIO; |
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457 goto out; |
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458 } |
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459 |
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460 /* |
| 789 | 461 * Find the best uberblock. |
| 462 */ | |
| 463 bzero(ub, sizeof (uberblock_t)); | |
| 464 | |
| 465 zio = zio_root(spa, NULL, NULL, | |
| 466 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); | |
| 467 vdev_uberblock_load(zio, rvd, ub); | |
| 468 error = zio_wait(zio); | |
| 469 | |
| 470 /* | |
| 471 * If we weren't able to find a single valid uberblock, return failure. | |
| 472 */ | |
| 473 if (ub->ub_txg == 0) { | |
| 1760 | 474 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 475 VDEV_AUX_CORRUPT_DATA); | |
| 1544 | 476 error = ENXIO; |
| 477 goto out; | |
| 478 } | |
| 479 | |
| 480 /* | |
| 481 * If the pool is newer than the code, we can't open it. | |
| 482 */ | |
| 1760 | 483 if (ub->ub_version > ZFS_VERSION) { |
| 484 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 485 VDEV_AUX_VERSION_NEWER); | |
| 1544 | 486 error = ENOTSUP; |
| 487 goto out; | |
| 789 | 488 } |
| 489 | |
| 490 /* | |
| 491 * If the vdev guid sum doesn't match the uberblock, we have an | |
| 492 * incomplete configuration. | |
| 493 */ | |
| 1732 | 494 if (rvd->vdev_guid_sum != ub->ub_guid_sum && mosconfig) { |
| 1544 | 495 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 496 VDEV_AUX_BAD_GUID_SUM); | |
| 497 error = ENXIO; | |
| 498 goto out; | |
| 789 | 499 } |
| 500 | |
| 501 /* | |
| 502 * Initialize internal SPA structures. | |
| 503 */ | |
| 504 spa->spa_state = POOL_STATE_ACTIVE; | |
| 505 spa->spa_ubsync = spa->spa_uberblock; | |
| 506 spa->spa_first_txg = spa_last_synced_txg(spa) + 1; | |
| 1544 | 507 error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool); |
| 508 if (error) { | |
| 509 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 510 VDEV_AUX_CORRUPT_DATA); | |
| 511 goto out; | |
| 512 } | |
| 789 | 513 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; |
| 514 | |
| 1544 | 515 if (zap_lookup(spa->spa_meta_objset, |
| 789 | 516 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 517 sizeof (uint64_t), 1, &spa->spa_config_object) != 0) { |
| 518 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 519 VDEV_AUX_CORRUPT_DATA); | |
| 520 error = EIO; | |
| 521 goto out; | |
| 522 } | |
| 789 | 523 |
| 524 if (!mosconfig) { | |
| 2082 | 525 nvlist_t *newconfig; |
| 526 | |
| 527 if (load_nvlist(spa, spa->spa_config_object, &newconfig) != 0) { | |
| 1544 | 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 spa_config_set(spa, newconfig); | |
| 535 spa_unload(spa); | |
| 536 spa_deactivate(spa); | |
| 537 spa_activate(spa); | |
| 538 | |
| 1544 | 539 return (spa_load(spa, newconfig, state, B_TRUE)); |
| 540 } | |
| 541 | |
| 542 if (zap_lookup(spa->spa_meta_objset, | |
| 543 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, | |
| 544 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj) != 0) { | |
| 545 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 546 VDEV_AUX_CORRUPT_DATA); | |
| 547 error = EIO; | |
| 548 goto out; | |
| 789 | 549 } |
| 550 | |
| 1544 | 551 /* |
| 2082 | 552 * Load the bit that tells us to use the new accounting function |
| 553 * (raid-z deflation). If we have an older pool, this will not | |
| 554 * be present. | |
| 555 */ | |
| 556 error = zap_lookup(spa->spa_meta_objset, | |
| 557 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 558 sizeof (uint64_t), 1, &spa->spa_deflate); | |
| 559 if (error != 0 && error != ENOENT) { | |
| 560 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 561 VDEV_AUX_CORRUPT_DATA); | |
| 562 error = EIO; | |
| 563 goto out; | |
| 564 } | |
| 565 | |
| 566 /* | |
| 1544 | 567 * Load the persistent error log. If we have an older pool, this will |
| 568 * not be present. | |
| 569 */ | |
| 570 error = zap_lookup(spa->spa_meta_objset, | |
| 571 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_LAST, | |
| 572 sizeof (uint64_t), 1, &spa->spa_errlog_last); | |
|
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573 if (error != 0 && error != ENOENT) { |
| 1544 | 574 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 575 VDEV_AUX_CORRUPT_DATA); | |
| 576 error = EIO; | |
| 577 goto out; | |
| 578 } | |
| 579 | |
| 580 error = zap_lookup(spa->spa_meta_objset, | |
| 581 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_SCRUB, | |
| 582 sizeof (uint64_t), 1, &spa->spa_errlog_scrub); | |
| 583 if (error != 0 && error != ENOENT) { | |
| 584 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 585 VDEV_AUX_CORRUPT_DATA); | |
| 586 error = EIO; | |
| 587 goto out; | |
| 588 } | |
| 789 | 589 |
| 590 /* | |
| 2082 | 591 * Load any hot spares for this pool. |
| 592 */ | |
| 593 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, | |
| 594 DMU_POOL_SPARES, sizeof (uint64_t), 1, &spa->spa_spares_object); | |
| 595 if (error != 0 && error != ENOENT) { | |
| 596 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 597 VDEV_AUX_CORRUPT_DATA); | |
| 598 error = EIO; | |
| 599 goto out; | |
| 600 } | |
| 601 if (error == 0) { | |
| 602 ASSERT(spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 603 if (load_nvlist(spa, spa->spa_spares_object, | |
| 604 &spa->spa_sparelist) != 0) { | |
| 605 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 606 VDEV_AUX_CORRUPT_DATA); | |
| 607 error = EIO; | |
| 608 goto out; | |
| 609 } | |
| 610 | |
| 611 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 612 spa_load_spares(spa); | |
| 613 spa_config_exit(spa, FTAG); | |
| 614 } | |
| 615 | |
| 616 /* | |
|
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617 * Load the vdev state for all toplevel vdevs. |
| 789 | 618 */ |
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619 vdev_load(rvd); |
| 789 | 620 |
| 621 /* | |
| 622 * Propagate the leaf DTLs we just loaded all the way up the tree. | |
| 623 */ | |
| 1544 | 624 spa_config_enter(spa, RW_WRITER, FTAG); |
| 789 | 625 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); |
| 1544 | 626 spa_config_exit(spa, FTAG); |
| 789 | 627 |
| 628 /* | |
| 629 * Check the state of the root vdev. If it can't be opened, it | |
| 630 * indicates one or more toplevel vdevs are faulted. | |
| 631 */ | |
| 1544 | 632 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
| 633 error = ENXIO; | |
| 634 goto out; | |
| 635 } | |
| 789 | 636 |
| 1544 | 637 if ((spa_mode & FWRITE) && state != SPA_LOAD_TRYIMPORT) { |
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638 dmu_tx_t *tx; |
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639 int need_update = B_FALSE; |
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640 int c; |
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641 |
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642 /* |
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643 * Claim log blocks that haven't been committed yet. |
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644 * This must all happen in a single txg. |
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645 */ |
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646 tx = dmu_tx_create_assigned(spa_get_dsl(spa), |
| 789 | 647 spa_first_txg(spa)); |
| 648 dmu_objset_find(spa->spa_name, zil_claim, tx, 0); | |
| 649 dmu_tx_commit(tx); | |
| 650 | |
| 651 spa->spa_sync_on = B_TRUE; | |
| 652 txg_sync_start(spa->spa_dsl_pool); | |
| 653 | |
| 654 /* | |
| 655 * Wait for all claims to sync. | |
| 656 */ | |
| 657 txg_wait_synced(spa->spa_dsl_pool, 0); | |
|
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658 |
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659 /* |
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660 * If the config cache is stale, or we have uninitialized |
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661 * metaslabs (see spa_vdev_add()), then update the config. |
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662 */ |
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663 if (config_cache_txg != spa->spa_config_txg || |
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664 state == SPA_LOAD_IMPORT) |
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665 need_update = B_TRUE; |
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666 |
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667 for (c = 0; c < rvd->vdev_children; c++) |
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668 if (rvd->vdev_child[c]->vdev_ms_array == 0) |
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669 need_update = B_TRUE; |
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670 |
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671 /* |
|
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672 * Update the config cache asychronously in case we're the |
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673 * root pool, in which case the config cache isn't writable yet. |
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674 */ |
|
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675 if (need_update) |
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676 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); |
| 789 | 677 } |
| 678 | |
| 1544 | 679 error = 0; |
| 680 out: | |
| 2082 | 681 if (error && error != EBADF) |
| 1544 | 682 zfs_ereport_post(FM_EREPORT_ZFS_POOL, spa, NULL, NULL, 0, 0); |
| 683 spa->spa_load_state = SPA_LOAD_NONE; | |
| 684 spa->spa_ena = 0; | |
| 685 | |
| 686 return (error); | |
| 789 | 687 } |
| 688 | |
| 689 /* | |
| 690 * Pool Open/Import | |
| 691 * | |
| 692 * The import case is identical to an open except that the configuration is sent | |
| 693 * down from userland, instead of grabbed from the configuration cache. For the | |
| 694 * case of an open, the pool configuration will exist in the | |
| 695 * POOL_STATE_UNITIALIZED state. | |
| 696 * | |
| 697 * The stats information (gen/count/ustats) is used to gather vdev statistics at | |
| 698 * the same time open the pool, without having to keep around the spa_t in some | |
| 699 * ambiguous state. | |
| 700 */ | |
| 701 static int | |
| 702 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) | |
| 703 { | |
| 704 spa_t *spa; | |
| 705 int error; | |
| 706 int loaded = B_FALSE; | |
| 707 int locked = B_FALSE; | |
| 708 | |
| 709 *spapp = NULL; | |
| 710 | |
| 711 /* | |
| 712 * As disgusting as this is, we need to support recursive calls to this | |
| 713 * function because dsl_dir_open() is called during spa_load(), and ends | |
| 714 * up calling spa_open() again. The real fix is to figure out how to | |
| 715 * avoid dsl_dir_open() calling this in the first place. | |
| 716 */ | |
| 717 if (mutex_owner(&spa_namespace_lock) != curthread) { | |
| 718 mutex_enter(&spa_namespace_lock); | |
| 719 locked = B_TRUE; | |
| 720 } | |
| 721 | |
| 722 if ((spa = spa_lookup(pool)) == NULL) { | |
| 723 if (locked) | |
| 724 mutex_exit(&spa_namespace_lock); | |
| 725 return (ENOENT); | |
| 726 } | |
| 727 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { | |
| 728 | |
| 729 spa_activate(spa); | |
| 730 | |
|
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731 error = spa_load(spa, spa->spa_config, SPA_LOAD_OPEN, B_FALSE); |
| 789 | 732 |
| 733 if (error == EBADF) { | |
| 734 /* | |
|
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735 * If vdev_validate() returns failure (indicated by |
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736 * EBADF), it indicates that one of the vdevs indicates |
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737 * that the pool has been exported or destroyed. If |
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738 * this is the case, the config cache is out of sync and |
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739 * we should remove the pool from the namespace. |
| 789 | 740 */ |
| 2082 | 741 zfs_post_ok(spa, NULL); |
| 789 | 742 spa_unload(spa); |
| 743 spa_deactivate(spa); | |
| 744 spa_remove(spa); | |
| 745 spa_config_sync(); | |
| 746 if (locked) | |
| 747 mutex_exit(&spa_namespace_lock); | |
| 748 return (ENOENT); | |
| 1544 | 749 } |
| 750 | |
| 751 if (error) { | |
| 789 | 752 /* |
| 753 * We can't open the pool, but we still have useful | |
| 754 * information: the state of each vdev after the | |
| 755 * attempted vdev_open(). Return this to the user. | |
| 756 */ | |
|
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757 if (config != NULL && spa->spa_root_vdev != NULL) { |
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758 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 759 *config = spa_config_generate(spa, NULL, -1ULL, |
| 760 B_TRUE); | |
|
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761 spa_config_exit(spa, FTAG); |
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762 } |
| 789 | 763 spa_unload(spa); |
| 764 spa_deactivate(spa); | |
| 1544 | 765 spa->spa_last_open_failed = B_TRUE; |
| 789 | 766 if (locked) |
| 767 mutex_exit(&spa_namespace_lock); | |
| 768 *spapp = NULL; | |
| 769 return (error); | |
| 1544 | 770 } else { |
| 771 zfs_post_ok(spa, NULL); | |
| 772 spa->spa_last_open_failed = B_FALSE; | |
| 789 | 773 } |
| 774 | |
| 775 loaded = B_TRUE; | |
| 776 } | |
| 777 | |
| 778 spa_open_ref(spa, tag); | |
| 779 if (locked) | |
| 780 mutex_exit(&spa_namespace_lock); | |
| 781 | |
| 782 *spapp = spa; | |
| 783 | |
| 784 if (config != NULL) { | |
| 1544 | 785 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 786 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
| 1544 | 787 spa_config_exit(spa, FTAG); |
| 789 | 788 } |
| 789 | |
| 790 /* | |
| 791 * If we just loaded the pool, resilver anything that's out of date. | |
| 792 */ | |
| 793 if (loaded && (spa_mode & FWRITE)) | |
| 794 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 795 | |
| 796 return (0); | |
| 797 } | |
| 798 | |
| 799 int | |
| 800 spa_open(const char *name, spa_t **spapp, void *tag) | |
| 801 { | |
| 802 return (spa_open_common(name, spapp, tag, NULL)); | |
| 803 } | |
| 804 | |
| 1544 | 805 /* |
| 806 * Lookup the given spa_t, incrementing the inject count in the process, | |
| 807 * preventing it from being exported or destroyed. | |
| 808 */ | |
| 809 spa_t * | |
| 810 spa_inject_addref(char *name) | |
| 811 { | |
| 812 spa_t *spa; | |
| 813 | |
| 814 mutex_enter(&spa_namespace_lock); | |
| 815 if ((spa = spa_lookup(name)) == NULL) { | |
| 816 mutex_exit(&spa_namespace_lock); | |
| 817 return (NULL); | |
| 818 } | |
| 819 spa->spa_inject_ref++; | |
| 820 mutex_exit(&spa_namespace_lock); | |
| 821 | |
| 822 return (spa); | |
| 823 } | |
| 824 | |
| 825 void | |
| 826 spa_inject_delref(spa_t *spa) | |
| 827 { | |
| 828 mutex_enter(&spa_namespace_lock); | |
| 829 spa->spa_inject_ref--; | |
| 830 mutex_exit(&spa_namespace_lock); | |
| 831 } | |
| 832 | |
| 2082 | 833 static void |
| 834 spa_add_spares(spa_t *spa, nvlist_t *config) | |
| 835 { | |
| 836 nvlist_t **spares; | |
| 837 uint_t i, nspares; | |
| 838 nvlist_t *nvroot; | |
| 839 uint64_t guid; | |
| 840 vdev_stat_t *vs; | |
| 841 uint_t vsc; | |
| 842 | |
| 843 if (spa->spa_nspares == 0) | |
| 844 return; | |
| 845 | |
| 846 VERIFY(nvlist_lookup_nvlist(config, | |
| 847 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); | |
| 848 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 849 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 850 if (nspares != 0) { | |
| 851 VERIFY(nvlist_add_nvlist_array(nvroot, | |
| 852 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 853 VERIFY(nvlist_lookup_nvlist_array(nvroot, | |
| 854 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 855 | |
| 856 /* | |
| 857 * Go through and find any spares which have since been | |
| 858 * repurposed as an active spare. If this is the case, update | |
| 859 * their status appropriately. | |
| 860 */ | |
| 861 for (i = 0; i < nspares; i++) { | |
| 862 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 863 ZPOOL_CONFIG_GUID, &guid) == 0); | |
| 864 if (spa_spare_inuse(guid)) { | |
| 865 VERIFY(nvlist_lookup_uint64_array( | |
| 866 spares[i], ZPOOL_CONFIG_STATS, | |
| 867 (uint64_t **)&vs, &vsc) == 0); | |
| 868 vs->vs_state = VDEV_STATE_CANT_OPEN; | |
| 869 vs->vs_aux = VDEV_AUX_SPARED; | |
| 870 } | |
| 871 } | |
| 872 } | |
| 873 } | |
| 874 | |
| 789 | 875 int |
| 1544 | 876 spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) |
| 789 | 877 { |
| 878 int error; | |
| 879 spa_t *spa; | |
| 880 | |
| 881 *config = NULL; | |
| 882 error = spa_open_common(name, &spa, FTAG, config); | |
| 883 | |
| 2082 | 884 if (spa && *config != NULL) { |
| 1544 | 885 VERIFY(nvlist_add_uint64(*config, ZPOOL_CONFIG_ERRCOUNT, |
| 886 spa_get_errlog_size(spa)) == 0); | |
| 887 | |
| 2082 | 888 spa_add_spares(spa, *config); |
| 889 } | |
| 890 | |
| 1544 | 891 /* |
| 892 * We want to get the alternate root even for faulted pools, so we cheat | |
| 893 * and call spa_lookup() directly. | |
| 894 */ | |
| 895 if (altroot) { | |
| 896 if (spa == NULL) { | |
| 897 mutex_enter(&spa_namespace_lock); | |
| 898 spa = spa_lookup(name); | |
| 899 if (spa) | |
| 900 spa_altroot(spa, altroot, buflen); | |
| 901 else | |
| 902 altroot[0] = '\0'; | |
| 903 spa = NULL; | |
| 904 mutex_exit(&spa_namespace_lock); | |
| 905 } else { | |
| 906 spa_altroot(spa, altroot, buflen); | |
| 907 } | |
| 908 } | |
| 909 | |
| 789 | 910 if (spa != NULL) |
| 911 spa_close(spa, FTAG); | |
| 912 | |
| 913 return (error); | |
| 914 } | |
| 915 | |
| 916 /* | |
| 2082 | 917 * Validate that the 'spares' array is well formed. We must have an array of |
| 918 * nvlists, each which describes a valid leaf vdev. | |
| 919 */ | |
| 920 static int | |
| 921 spa_validate_spares(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) | |
| 922 { | |
| 923 nvlist_t **spares; | |
| 924 uint_t i, nspares; | |
| 925 vdev_t *vd; | |
| 926 int error; | |
| 927 | |
| 928 /* | |
| 929 * It's acceptable to have no spares specified. | |
| 930 */ | |
| 931 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 932 &spares, &nspares) != 0) | |
| 933 return (0); | |
| 934 | |
| 935 if (nspares == 0) | |
| 936 return (EINVAL); | |
| 937 | |
| 938 /* | |
| 939 * Make sure the pool is formatted with a version that supports hot | |
| 940 * spares. | |
| 941 */ | |
| 942 if (spa_version(spa) < ZFS_VERSION_SPARES) | |
| 943 return (ENOTSUP); | |
| 944 | |
| 945 for (i = 0; i < nspares; i++) { | |
| 946 if ((error = spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 947 mode)) != 0) | |
| 948 return (error); | |
| 949 | |
| 950 if (!vd->vdev_ops->vdev_op_leaf) { | |
| 951 vdev_free(vd); | |
| 952 return (EINVAL); | |
| 953 } | |
| 954 | |
| 955 if ((error = vdev_open(vd)) != 0) { | |
| 956 vdev_free(vd); | |
| 957 return (error); | |
| 958 } | |
| 959 | |
| 960 vd->vdev_top = vd; | |
| 961 if ((error = vdev_label_spare(vd, crtxg)) != 0) { | |
| 962 vdev_free(vd); | |
| 963 return (error); | |
| 964 } | |
| 965 | |
| 966 VERIFY(nvlist_add_uint64(spares[i], ZPOOL_CONFIG_GUID, | |
| 967 vd->vdev_guid) == 0); | |
| 968 | |
| 969 vdev_free(vd); | |
| 970 } | |
| 971 | |
| 972 return (0); | |
| 973 } | |
| 974 | |
| 975 /* | |
| 789 | 976 * Pool Creation |
| 977 */ | |
| 978 int | |
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979 spa_create(const char *pool, nvlist_t *nvroot, const char *altroot) |
| 789 | 980 { |
| 981 spa_t *spa; | |
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982 vdev_t *rvd; |
| 789 | 983 dsl_pool_t *dp; |
| 984 dmu_tx_t *tx; | |
| 2082 | 985 int c, error = 0; |
| 789 | 986 uint64_t txg = TXG_INITIAL; |
| 2082 | 987 nvlist_t **spares; |
| 988 uint_t nspares; | |
| 789 | 989 |
| 990 /* | |
| 991 * If this pool already exists, return failure. | |
| 992 */ | |
| 993 mutex_enter(&spa_namespace_lock); | |
| 994 if (spa_lookup(pool) != NULL) { | |
| 995 mutex_exit(&spa_namespace_lock); | |
| 996 return (EEXIST); | |
| 997 } | |
| 998 | |
| 999 /* | |
| 1000 * Allocate a new spa_t structure. | |
| 1001 */ | |
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1002 spa = spa_add(pool, altroot); |
| 789 | 1003 spa_activate(spa); |
| 1004 | |
| 1005 spa->spa_uberblock.ub_txg = txg - 1; | |
| 1760 | 1006 spa->spa_uberblock.ub_version = ZFS_VERSION; |
| 789 | 1007 spa->spa_ubsync = spa->spa_uberblock; |
| 1008 | |
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1009 /* |
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1010 * Create the root vdev. |
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1011 */ |
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1012 spa_config_enter(spa, RW_WRITER, FTAG); |
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1013 |
| 2082 | 1014 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); |
| 1015 | |
| 1016 ASSERT(error != 0 || rvd != NULL); | |
| 1017 ASSERT(error != 0 || spa->spa_root_vdev == rvd); | |
| 1018 | |
| 1019 if (error == 0 && rvd->vdev_children == 0) | |
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1020 error = EINVAL; |
| 2082 | 1021 |
| 1022 if (error == 0 && | |
| 1023 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && | |
| 1024 (error = spa_validate_spares(spa, nvroot, txg, | |
| 1025 VDEV_ALLOC_ADD)) == 0) { | |
| 1026 for (c = 0; c < rvd->vdev_children; c++) | |
| 1027 vdev_init(rvd->vdev_child[c], txg); | |
| 1028 vdev_config_dirty(rvd); | |
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1029 } |
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1030 |
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1031 spa_config_exit(spa, FTAG); |
| 789 | 1032 |
| 2082 | 1033 if (error != 0) { |
| 789 | 1034 spa_unload(spa); |
| 1035 spa_deactivate(spa); | |
| 1036 spa_remove(spa); | |
| 1037 mutex_exit(&spa_namespace_lock); | |
| 1038 return (error); | |
| 1039 } | |
| 1040 | |
| 2082 | 1041 /* |
| 1042 * Get the list of spares, if specified. | |
| 1043 */ | |
| 1044 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1045 &spares, &nspares) == 0) { | |
| 1046 VERIFY(nvlist_alloc(&spa->spa_sparelist, NV_UNIQUE_NAME, | |
| 1047 KM_SLEEP) == 0); | |
| 1048 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1049 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1050 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1051 spa_load_spares(spa); | |
| 1052 spa_config_exit(spa, FTAG); | |
| 1053 spa->spa_sync_spares = B_TRUE; | |
| 1054 } | |
| 1055 | |
| 789 | 1056 spa->spa_dsl_pool = dp = dsl_pool_create(spa, txg); |
| 1057 spa->spa_meta_objset = dp->dp_meta_objset; | |
| 1058 | |
| 1059 tx = dmu_tx_create_assigned(dp, txg); | |
| 1060 | |
| 1061 /* | |
| 1062 * Create the pool config object. | |
| 1063 */ | |
| 1064 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 1065 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 1066 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 1067 | |
| 1544 | 1068 if (zap_add(spa->spa_meta_objset, |
| 789 | 1069 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 1070 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { |
| 1071 cmn_err(CE_PANIC, "failed to add pool config"); | |
| 1072 } | |
| 789 | 1073 |
| 2082 | 1074 /* Newly created pools are always deflated. */ |
| 1075 spa->spa_deflate = TRUE; | |
| 1076 if (zap_add(spa->spa_meta_objset, | |
| 1077 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 1078 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { | |
| 1079 cmn_err(CE_PANIC, "failed to add deflate"); | |
| 1080 } | |
| 1081 | |
| 789 | 1082 /* |
| 1083 * Create the deferred-free bplist object. Turn off compression | |
| 1084 * because sync-to-convergence takes longer if the blocksize | |
| 1085 * keeps changing. | |
| 1086 */ | |
| 1087 spa->spa_sync_bplist_obj = bplist_create(spa->spa_meta_objset, | |
| 1088 1 << 14, tx); | |
| 1089 dmu_object_set_compress(spa->spa_meta_objset, spa->spa_sync_bplist_obj, | |
| 1090 ZIO_COMPRESS_OFF, tx); | |
| 1091 | |
| 1544 | 1092 if (zap_add(spa->spa_meta_objset, |
| 789 | 1093 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, |
| 1544 | 1094 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj, tx) != 0) { |
| 1095 cmn_err(CE_PANIC, "failed to add bplist"); | |
| 1096 } | |
| 789 | 1097 |
| 1098 dmu_tx_commit(tx); | |
| 1099 | |
| 1100 spa->spa_sync_on = B_TRUE; | |
| 1101 txg_sync_start(spa->spa_dsl_pool); | |
| 1102 | |
| 1103 /* | |
| 1104 * We explicitly wait for the first transaction to complete so that our | |
| 1105 * bean counters are appropriately updated. | |
| 1106 */ | |
| 1107 txg_wait_synced(spa->spa_dsl_pool, txg); | |
| 1108 | |
| 1109 spa_config_sync(); | |
| 1110 | |
| 1111 mutex_exit(&spa_namespace_lock); | |
| 1112 | |
| 1113 return (0); | |
| 1114 } | |
| 1115 | |
| 1116 /* | |
| 1117 * Import the given pool into the system. We set up the necessary spa_t and | |
| 1118 * then call spa_load() to do the dirty work. | |
| 1119 */ | |
| 1120 int | |
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1121 spa_import(const char *pool, nvlist_t *config, const char *altroot) |
| 789 | 1122 { |
| 1123 spa_t *spa; | |
| 1124 int error; | |
| 2082 | 1125 nvlist_t *nvroot; |
| 1126 nvlist_t **spares; | |
| 1127 uint_t nspares; | |
| 789 | 1128 |
| 1129 if (!(spa_mode & FWRITE)) | |
| 1130 return (EROFS); | |
| 1131 | |
| 1132 /* | |
| 1133 * If a pool with this name exists, return failure. | |
| 1134 */ | |
| 1135 mutex_enter(&spa_namespace_lock); | |
| 1136 if (spa_lookup(pool) != NULL) { | |
| 1137 mutex_exit(&spa_namespace_lock); | |
| 1138 return (EEXIST); | |
| 1139 } | |
| 1140 | |
| 1141 /* | |
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1142 * Create and initialize the spa structure. |
| 789 | 1143 */ |
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1144 spa = spa_add(pool, altroot); |
| 789 | 1145 spa_activate(spa); |
| 1146 | |
| 1147 /* | |
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1148 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1149 * Pass TRUE for mosconfig because the user-supplied config |
| 1150 * is actually the one to trust when doing an import. | |
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1151 */ |
| 1732 | 1152 error = spa_load(spa, config, SPA_LOAD_IMPORT, B_TRUE); |
| 789 | 1153 |
| 2082 | 1154 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1155 /* | |
| 1156 * Toss any existing sparelist, as it doesn't have any validity anymore, | |
| 1157 * and conflicts with spa_has_spare(). | |
| 1158 */ | |
| 1159 if (spa->spa_sparelist) { | |
| 1160 nvlist_free(spa->spa_sparelist); | |
| 1161 spa->spa_sparelist = NULL; | |
| 1162 spa_load_spares(spa); | |
| 1163 } | |
| 1164 | |
| 1165 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
| 1166 &nvroot) == 0); | |
| 1167 if (error == 0) | |
| 1168 error = spa_validate_spares(spa, nvroot, -1ULL, | |
| 1169 VDEV_ALLOC_SPARE); | |
| 1170 spa_config_exit(spa, FTAG); | |
| 1171 | |
| 1172 if (error != 0) { | |
| 789 | 1173 spa_unload(spa); |
| 1174 spa_deactivate(spa); | |
| 1175 spa_remove(spa); | |
| 1176 mutex_exit(&spa_namespace_lock); | |
| 1177 return (error); | |
| 1178 } | |
| 1179 | |
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1180 /* |
| 2082 | 1181 * Override any spares as specified by the user, as these may have |
| 1182 * correct device names/devids, etc. | |
| 1183 */ | |
| 1184 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1185 &spares, &nspares) == 0) { | |
| 1186 if (spa->spa_sparelist) | |
| 1187 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1188 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1189 else | |
| 1190 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1191 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1192 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1193 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1194 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1195 spa_load_spares(spa); | |
| 1196 spa_config_exit(spa, FTAG); | |
| 1197 spa->spa_sync_spares = B_TRUE; | |
| 1198 } | |
| 1199 | |
| 1200 /* | |
|
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1201 * Update the config cache to include the newly-imported pool. |
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1202 */ |
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1203 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1204 |
| 789 | 1205 mutex_exit(&spa_namespace_lock); |
| 1206 | |
| 1207 /* | |
| 1208 * Resilver anything that's out of date. | |
| 1209 */ | |
| 1210 if (spa_mode & FWRITE) | |
| 1211 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1212 | |
| 1213 return (0); | |
| 1214 } | |
| 1215 | |
| 1216 /* | |
| 1217 * This (illegal) pool name is used when temporarily importing a spa_t in order | |
| 1218 * to get the vdev stats associated with the imported devices. | |
| 1219 */ | |
| 1220 #define TRYIMPORT_NAME "$import" | |
| 1221 | |
| 1222 nvlist_t * | |
| 1223 spa_tryimport(nvlist_t *tryconfig) | |
| 1224 { | |
| 1225 nvlist_t *config = NULL; | |
| 1226 char *poolname; | |
| 1227 spa_t *spa; | |
| 1228 uint64_t state; | |
| 1229 | |
| 1230 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) | |
| 1231 return (NULL); | |
| 1232 | |
| 1233 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) | |
| 1234 return (NULL); | |
| 1235 | |
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1236 /* |
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1237 * Create and initialize the spa structure. |
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1238 */ |
| 789 | 1239 mutex_enter(&spa_namespace_lock); |
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1240 spa = spa_add(TRYIMPORT_NAME, NULL); |
| 789 | 1241 spa_activate(spa); |
| 1242 | |
| 1243 /* | |
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1244 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1245 * Pass TRUE for mosconfig because the user-supplied config |
| 1246 * is actually the one to trust when doing an import. | |
| 789 | 1247 */ |
| 1732 | 1248 (void) spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE); |
| 789 | 1249 |
| 1250 /* | |
| 1251 * If 'tryconfig' was at least parsable, return the current config. | |
| 1252 */ | |
| 1253 if (spa->spa_root_vdev != NULL) { | |
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1254 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 1255 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
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1256 spa_config_exit(spa, FTAG); |
| 789 | 1257 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, |
| 1258 poolname) == 0); | |
| 1259 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
| 1260 state) == 0); | |
| 2082 | 1261 |
| 1262 /* | |
| 1263 * Add the list of hot spares. | |
| 1264 */ | |
| 1265 spa_add_spares(spa, config); | |
| 789 | 1266 } |
| 1267 | |
| 1268 spa_unload(spa); | |
| 1269 spa_deactivate(spa); | |
| 1270 spa_remove(spa); | |
| 1271 mutex_exit(&spa_namespace_lock); | |
| 1272 | |
| 1273 return (config); | |
| 1274 } | |
| 1275 | |
| 1276 /* | |
| 1277 * Pool export/destroy | |
| 1278 * | |
| 1279 * The act of destroying or exporting a pool is very simple. We make sure there | |
| 1280 * is no more pending I/O and any references to the pool are gone. Then, we | |
| 1281 * update the pool state and sync all the labels to disk, removing the | |
| 1282 * configuration from the cache afterwards. | |
| 1283 */ | |
| 1284 static int | |
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1285 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig) |
| 789 | 1286 { |
| 1287 spa_t *spa; | |
| 1288 | |
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1289 if (oldconfig) |
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1290 *oldconfig = NULL; |
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1291 |
| 789 | 1292 if (!(spa_mode & FWRITE)) |
| 1293 return (EROFS); | |
| 1294 | |
| 1295 mutex_enter(&spa_namespace_lock); | |
| 1296 if ((spa = spa_lookup(pool)) == NULL) { | |
| 1297 mutex_exit(&spa_namespace_lock); | |
| 1298 return (ENOENT); | |
| 1299 } | |
| 1300 | |
| 1301 /* | |
| 1544 | 1302 * Put a hold on the pool, drop the namespace lock, stop async tasks, |
| 1303 * reacquire the namespace lock, and see if we can export. | |
| 1304 */ | |
| 1305 spa_open_ref(spa, FTAG); | |
| 1306 mutex_exit(&spa_namespace_lock); | |
| 1307 spa_async_suspend(spa); | |
| 1308 mutex_enter(&spa_namespace_lock); | |
| 1309 spa_close(spa, FTAG); | |
| 1310 | |
| 1311 /* | |
| 789 | 1312 * The pool will be in core if it's openable, |
| 1313 * in which case we can modify its state. | |
| 1314 */ | |
| 1315 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { | |
| 1316 /* | |
| 1317 * Objsets may be open only because they're dirty, so we | |
| 1318 * have to force it to sync before checking spa_refcnt. | |
| 1319 */ | |
| 1320 spa_scrub_suspend(spa); | |
| 1321 txg_wait_synced(spa->spa_dsl_pool, 0); | |
| 1322 | |
| 1544 | 1323 /* |
| 1324 * A pool cannot be exported or destroyed if there are active | |
| 1325 * references. If we are resetting a pool, allow references by | |
| 1326 * fault injection handlers. | |
| 1327 */ | |
| 1328 if (!spa_refcount_zero(spa) || | |
| 1329 (spa->spa_inject_ref != 0 && | |
| 1330 new_state != POOL_STATE_UNINITIALIZED)) { | |
| 789 | 1331 spa_scrub_resume(spa); |
| 1544 | 1332 spa_async_resume(spa); |
| 789 | 1333 mutex_exit(&spa_namespace_lock); |
| 1334 return (EBUSY); | |
| 1335 } | |
| 1336 | |
| 1337 spa_scrub_resume(spa); | |
| 1338 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); | |
| 1339 | |
| 1340 /* | |
| 1341 * We want this to be reflected on every label, | |
| 1342 * so mark them all dirty. spa_unload() will do the | |
| 1343 * final sync that pushes these changes out. | |
| 1344 */ | |
| 1544 | 1345 if (new_state != POOL_STATE_UNINITIALIZED) { |
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1346 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1544 | 1347 spa->spa_state = new_state; |
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1348 spa->spa_final_txg = spa_last_synced_txg(spa) + 1; |
| 1544 | 1349 vdev_config_dirty(spa->spa_root_vdev); |
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1350 spa_config_exit(spa, FTAG); |
| 1544 | 1351 } |
| 789 | 1352 } |
| 1353 | |
| 1354 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 1355 spa_unload(spa); | |
| 1356 spa_deactivate(spa); | |
| 1357 } | |
| 1358 | |
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1359 if (oldconfig && spa->spa_config) |
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1360 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); |
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1361 |
| 1544 | 1362 if (new_state != POOL_STATE_UNINITIALIZED) { |
| 1363 spa_remove(spa); | |
| 1364 spa_config_sync(); | |
| 1365 } | |
| 789 | 1366 mutex_exit(&spa_namespace_lock); |
| 1367 | |
| 1368 return (0); | |
| 1369 } | |
| 1370 | |
| 1371 /* | |
| 1372 * Destroy a storage pool. | |
| 1373 */ | |
| 1374 int | |
| 1375 spa_destroy(char *pool) | |
| 1376 { | |
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1377 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL)); |
| 789 | 1378 } |
| 1379 | |
| 1380 /* | |
| 1381 * Export a storage pool. | |
| 1382 */ | |
| 1383 int | |
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1384 spa_export(char *pool, nvlist_t **oldconfig) |
| 789 | 1385 { |
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1386 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig)); |
| 789 | 1387 } |
| 1388 | |
| 1389 /* | |
| 1544 | 1390 * Similar to spa_export(), this unloads the spa_t without actually removing it |
| 1391 * from the namespace in any way. | |
| 1392 */ | |
| 1393 int | |
| 1394 spa_reset(char *pool) | |
| 1395 { | |
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1396 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL)); |
| 1544 | 1397 } |
| 1398 | |
| 1399 | |
| 1400 /* | |
| 789 | 1401 * ========================================================================== |
| 1402 * Device manipulation | |
| 1403 * ========================================================================== | |
| 1404 */ | |
| 1405 | |
| 1406 /* | |
| 1407 * Add capacity to a storage pool. | |
| 1408 */ | |
| 1409 int | |
| 1410 spa_vdev_add(spa_t *spa, nvlist_t *nvroot) | |
| 1411 { | |
| 1412 uint64_t txg; | |
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1413 int c, error; |
| 789 | 1414 vdev_t *rvd = spa->spa_root_vdev; |
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1415 vdev_t *vd, *tvd; |
| 2082 | 1416 nvlist_t **spares; |
| 1417 uint_t i, nspares; | |
| 789 | 1418 |
| 1419 txg = spa_vdev_enter(spa); | |
| 1420 | |
| 2082 | 1421 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, |
| 1422 VDEV_ALLOC_ADD)) != 0) | |
| 1423 return (spa_vdev_exit(spa, NULL, txg, error)); | |
| 1424 | |
| 1425 if ((error = spa_validate_spares(spa, nvroot, txg, | |
| 1426 VDEV_ALLOC_ADD)) != 0) | |
| 789 | 1427 return (spa_vdev_exit(spa, vd, txg, error)); |
| 1428 | |
| 2082 | 1429 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, |
| 1430 &spares, &nspares) != 0) | |
| 1431 nspares = 0; | |
| 1432 | |
| 1433 if (vd->vdev_children == 0 && nspares == 0) | |
| 1434 return (spa_vdev_exit(spa, vd, txg, EINVAL)); | |
| 1435 | |
| 1436 if (vd->vdev_children != 0) { | |
| 1437 if ((error = vdev_create(vd, txg, B_FALSE)) != 0) | |
| 1438 return (spa_vdev_exit(spa, vd, txg, error)); | |
| 1439 | |
| 1440 /* | |
| 1441 * Transfer each new top-level vdev from vd to rvd. | |
| 1442 */ | |
| 1443 for (c = 0; c < vd->vdev_children; c++) { | |
| 1444 tvd = vd->vdev_child[c]; | |
| 1445 vdev_remove_child(vd, tvd); | |
| 1446 tvd->vdev_id = rvd->vdev_children; | |
| 1447 vdev_add_child(rvd, tvd); | |
| 1448 vdev_config_dirty(tvd); | |
| 1449 } | |
| 1450 } | |
| 1451 | |
| 1452 if (nspares != 0) { | |
| 1453 if (spa->spa_sparelist != NULL) { | |
| 1454 nvlist_t **oldspares; | |
| 1455 uint_t oldnspares; | |
| 1456 nvlist_t **newspares; | |
| 1457 | |
| 1458 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 1459 ZPOOL_CONFIG_SPARES, &oldspares, &oldnspares) == 0); | |
| 1460 | |
| 1461 newspares = kmem_alloc(sizeof (void *) * | |
| 1462 (nspares + oldnspares), KM_SLEEP); | |
| 1463 for (i = 0; i < oldnspares; i++) | |
| 1464 VERIFY(nvlist_dup(oldspares[i], | |
| 1465 &newspares[i], KM_SLEEP) == 0); | |
| 1466 for (i = 0; i < nspares; i++) | |
| 1467 VERIFY(nvlist_dup(spares[i], | |
| 1468 &newspares[i + oldnspares], | |
| 1469 KM_SLEEP) == 0); | |
| 1470 | |
| 1471 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1472 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1473 | |
| 1474 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1475 ZPOOL_CONFIG_SPARES, newspares, | |
| 1476 nspares + oldnspares) == 0); | |
| 1477 for (i = 0; i < oldnspares + nspares; i++) | |
| 1478 nvlist_free(newspares[i]); | |
| 1479 kmem_free(newspares, (oldnspares + nspares) * | |
| 1480 sizeof (void *)); | |
| 1481 } else { | |
| 1482 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1483 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1484 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1485 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1486 } | |
| 1487 | |
| 1488 spa_load_spares(spa); | |
| 1489 spa->spa_sync_spares = B_TRUE; | |
| 789 | 1490 } |
| 1491 | |
| 1492 /* | |
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1493 * We have to be careful when adding new vdevs to an existing pool. |
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1494 * If other threads start allocating from these vdevs before we |
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1495 * sync the config cache, and we lose power, then upon reboot we may |
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1496 * fail to open the pool because there are DVAs that the config cache |
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1497 * can't translate. Therefore, we first add the vdevs without |
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1498 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); |
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1499 * and then let spa_config_update() initialize the new metaslabs. |
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1500 * |
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1501 * spa_load() checks for added-but-not-initialized vdevs, so that |
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1502 * if we lose power at any point in this sequence, the remaining |
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1503 * steps will be completed the next time we load the pool. |
| 789 | 1504 */ |
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1505 (void) spa_vdev_exit(spa, vd, txg, 0); |
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1506 |
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1507 mutex_enter(&spa_namespace_lock); |
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1508 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1509 mutex_exit(&spa_namespace_lock); |
| 789 | 1510 |
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1511 return (0); |
| 789 | 1512 } |
| 1513 | |
| 1514 /* | |
| 1515 * Attach a device to a mirror. The arguments are the path to any device | |
| 1516 * in the mirror, and the nvroot for the new device. If the path specifies | |
| 1517 * a device that is not mirrored, we automatically insert the mirror vdev. | |
| 1518 * | |
| 1519 * If 'replacing' is specified, the new device is intended to replace the | |
| 1520 * existing device; in this case the two devices are made into their own | |
| 1521 * mirror using the 'replacing' vdev, which is functionally idendical to | |
| 1522 * the mirror vdev (it actually reuses all the same ops) but has a few | |
| 1523 * extra rules: you can't attach to it after it's been created, and upon | |
| 1524 * completion of resilvering, the first disk (the one being replaced) | |
| 1525 * is automatically detached. | |
| 1526 */ | |
| 1527 int | |
| 1544 | 1528 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) |
| 789 | 1529 { |
| 1530 uint64_t txg, open_txg; | |
| 1531 int error; | |
| 1532 vdev_t *rvd = spa->spa_root_vdev; | |
| 1533 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; | |
| 2082 | 1534 vdev_ops_t *pvops; |
| 789 | 1535 |
| 1536 txg = spa_vdev_enter(spa); | |
| 1537 | |
| 1544 | 1538 oldvd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1539 |
| 1540 if (oldvd == NULL) | |
| 1541 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1542 | |
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1543 if (!oldvd->vdev_ops->vdev_op_leaf) |
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1544 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1545 |
| 789 | 1546 pvd = oldvd->vdev_parent; |
| 1547 | |
| 2082 | 1548 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, |
| 1549 VDEV_ALLOC_ADD)) != 0 || newrootvd->vdev_children != 1) | |
| 789 | 1550 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); |
| 1551 | |
| 1552 newvd = newrootvd->vdev_child[0]; | |
| 1553 | |
| 1554 if (!newvd->vdev_ops->vdev_op_leaf) | |
| 1555 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); | |
| 1556 | |
| 2082 | 1557 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) |
| 789 | 1558 return (spa_vdev_exit(spa, newrootvd, txg, error)); |
| 1559 | |
| 2082 | 1560 if (!replacing) { |
| 1561 /* | |
| 1562 * For attach, the only allowable parent is a mirror or the root | |
| 1563 * vdev. | |
| 1564 */ | |
| 1565 if (pvd->vdev_ops != &vdev_mirror_ops && | |
| 1566 pvd->vdev_ops != &vdev_root_ops) | |
| 1567 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1568 | |
| 1569 pvops = &vdev_mirror_ops; | |
| 1570 } else { | |
| 1571 /* | |
| 1572 * Active hot spares can only be replaced by inactive hot | |
| 1573 * spares. | |
| 1574 */ | |
| 1575 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1576 pvd->vdev_child[1] == oldvd && | |
| 1577 !spa_has_spare(spa, newvd->vdev_guid)) | |
| 1578 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1579 | |
| 1580 /* | |
| 1581 * If the source is a hot spare, and the parent isn't already a | |
| 1582 * spare, then we want to create a new hot spare. Otherwise, we | |
| 1583 * want to create a replacing vdev. | |
| 1584 */ | |
| 1585 if (pvd->vdev_ops == &vdev_replacing_ops) | |
| 1586 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1587 else if (pvd->vdev_ops != &vdev_spare_ops && | |
| 1588 newvd->vdev_isspare) | |
| 1589 pvops = &vdev_spare_ops; | |
| 1590 else | |
| 1591 pvops = &vdev_replacing_ops; | |
| 1592 } | |
| 1593 | |
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1594 /* |
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1595 * Compare the new device size with the replaceable/attachable |
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1596 * device size. |
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1597 */ |
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1598 if (newvd->vdev_psize < vdev_get_rsize(oldvd)) |
| 789 | 1599 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); |
| 1600 | |
| 1732 | 1601 /* |
| 1602 * The new device cannot have a higher alignment requirement | |
| 1603 * than the top-level vdev. | |
| 1604 */ | |
| 1605 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) | |
| 789 | 1606 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); |
| 1607 | |
| 1608 /* | |
| 1609 * If this is an in-place replacement, update oldvd's path and devid | |
| 1610 * to make it distinguishable from newvd, and unopenable from now on. | |
| 1611 */ | |
| 1612 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { | |
| 1613 spa_strfree(oldvd->vdev_path); | |
| 1614 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, | |
| 1615 KM_SLEEP); | |
| 1616 (void) sprintf(oldvd->vdev_path, "%s/%s", | |
| 1617 newvd->vdev_path, "old"); | |
| 1618 if (oldvd->vdev_devid != NULL) { | |
| 1619 spa_strfree(oldvd->vdev_devid); | |
| 1620 oldvd->vdev_devid = NULL; | |
| 1621 } | |
| 1622 } | |
| 1623 | |
| 1624 /* | |
| 2082 | 1625 * If the parent is not a mirror, or if we're replacing, insert the new |
| 1626 * mirror/replacing/spare vdev above oldvd. | |
| 789 | 1627 */ |
| 1628 if (pvd->vdev_ops != pvops) | |
| 1629 pvd = vdev_add_parent(oldvd, pvops); | |
| 1630 | |
| 1631 ASSERT(pvd->vdev_top->vdev_parent == rvd); | |
| 1632 ASSERT(pvd->vdev_ops == pvops); | |
| 1633 ASSERT(oldvd->vdev_parent == pvd); | |
| 1634 | |
| 1635 /* | |
| 1636 * Extract the new device from its root and add it to pvd. | |
| 1637 */ | |
| 1638 vdev_remove_child(newrootvd, newvd); | |
| 1639 newvd->vdev_id = pvd->vdev_children; | |
| 1640 vdev_add_child(pvd, newvd); | |
| 1641 | |
| 1544 | 1642 /* |
| 1643 * If newvd is smaller than oldvd, but larger than its rsize, | |
| 1644 * the addition of newvd may have decreased our parent's asize. | |
| 1645 */ | |
| 1646 pvd->vdev_asize = MIN(pvd->vdev_asize, newvd->vdev_asize); | |
| 1647 | |
| 789 | 1648 tvd = newvd->vdev_top; |
| 1649 ASSERT(pvd->vdev_top == tvd); | |
| 1650 ASSERT(tvd->vdev_parent == rvd); | |
| 1651 | |
| 1652 vdev_config_dirty(tvd); | |
| 1653 | |
| 1654 /* | |
| 1655 * Set newvd's DTL to [TXG_INITIAL, open_txg]. It will propagate | |
| 1656 * upward when spa_vdev_exit() calls vdev_dtl_reassess(). | |
| 1657 */ | |
| 1658 open_txg = txg + TXG_CONCURRENT_STATES - 1; | |
| 1659 | |
| 1660 mutex_enter(&newvd->vdev_dtl_lock); | |
| 1661 space_map_add(&newvd->vdev_dtl_map, TXG_INITIAL, | |
| 1662 open_txg - TXG_INITIAL + 1); | |
| 1663 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1664 | |
| 1544 | 1665 dprintf("attached %s in txg %llu\n", newvd->vdev_path, txg); |
| 1666 | |
| 789 | 1667 /* |
| 1668 * Mark newvd's DTL dirty in this txg. | |
| 1669 */ | |
| 1732 | 1670 vdev_dirty(tvd, VDD_DTL, newvd, txg); |
| 789 | 1671 |
| 1672 (void) spa_vdev_exit(spa, newrootvd, open_txg, 0); | |
| 1673 | |
| 1674 /* | |
| 1675 * Kick off a resilver to update newvd. | |
| 1676 */ | |
| 1677 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1678 | |
| 1679 return (0); | |
| 1680 } | |
| 1681 | |
| 1682 /* | |
| 1683 * Detach a device from a mirror or replacing vdev. | |
| 1684 * If 'replace_done' is specified, only detach if the parent | |
| 1685 * is a replacing vdev. | |
| 1686 */ | |
| 1687 int | |
| 1544 | 1688 spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) |
| 789 | 1689 { |
| 1690 uint64_t txg; | |
| 1691 int c, t, error; | |
| 1692 vdev_t *rvd = spa->spa_root_vdev; | |
| 1693 vdev_t *vd, *pvd, *cvd, *tvd; | |
| 2082 | 1694 boolean_t unspare = B_FALSE; |
| 1695 uint64_t unspare_guid; | |
| 789 | 1696 |
| 1697 txg = spa_vdev_enter(spa); | |
| 1698 | |
| 1544 | 1699 vd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1700 |
| 1701 if (vd == NULL) | |
| 1702 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1703 | |
|
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1704 if (!vd->vdev_ops->vdev_op_leaf) |
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1705 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1706 |
| 789 | 1707 pvd = vd->vdev_parent; |
| 1708 | |
| 1709 /* | |
| 1710 * If replace_done is specified, only remove this device if it's | |
| 2082 | 1711 * the first child of a replacing vdev. For the 'spare' vdev, either |
| 1712 * disk can be removed. | |
| 789 | 1713 */ |
| 2082 | 1714 if (replace_done) { |
| 1715 if (pvd->vdev_ops == &vdev_replacing_ops) { | |
| 1716 if (vd->vdev_id != 0) | |
| 1717 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1718 } else if (pvd->vdev_ops != &vdev_spare_ops) { | |
| 1719 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1720 } | |
| 1721 } | |
| 1722 | |
| 1723 ASSERT(pvd->vdev_ops != &vdev_spare_ops || | |
| 1724 spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 789 | 1725 |
| 1726 /* | |
| 2082 | 1727 * Only mirror, replacing, and spare vdevs support detach. |
| 789 | 1728 */ |
| 1729 if (pvd->vdev_ops != &vdev_replacing_ops && | |
| 2082 | 1730 pvd->vdev_ops != &vdev_mirror_ops && |
| 1731 pvd->vdev_ops != &vdev_spare_ops) | |
| 789 | 1732 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
| 1733 | |
| 1734 /* | |
| 1735 * If there's only one replica, you can't detach it. | |
| 1736 */ | |
| 1737 if (pvd->vdev_children <= 1) | |
| 1738 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
| 1739 | |
| 1740 /* | |
| 1741 * If all siblings have non-empty DTLs, this device may have the only | |
| 1742 * valid copy of the data, which means we cannot safely detach it. | |
| 1743 * | |
| 1744 * XXX -- as in the vdev_offline() case, we really want a more | |
| 1745 * precise DTL check. | |
| 1746 */ | |
| 1747 for (c = 0; c < pvd->vdev_children; c++) { | |
| 1748 uint64_t dirty; | |
| 1749 | |
| 1750 cvd = pvd->vdev_child[c]; | |
| 1751 if (cvd == vd) | |
| 1752 continue; | |
| 1753 if (vdev_is_dead(cvd)) | |
| 1754 continue; | |
| 1755 mutex_enter(&cvd->vdev_dtl_lock); | |
| 1756 dirty = cvd->vdev_dtl_map.sm_space | | |
| 1757 cvd->vdev_dtl_scrub.sm_space; | |
| 1758 mutex_exit(&cvd->vdev_dtl_lock); | |
| 1759 if (!dirty) | |
| 1760 break; | |
| 1761 } | |
| 2082 | 1762 |
| 1763 /* | |
| 1764 * If we are a replacing or spare vdev, then we can always detach the | |
| 1765 * latter child, as that is how one cancels the operation. | |
| 1766 */ | |
| 1767 if ((pvd->vdev_ops == &vdev_mirror_ops || vd->vdev_id != 1) && | |
| 1768 c == pvd->vdev_children) | |
| 789 | 1769 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); |
| 1770 | |
| 1771 /* | |
| 2082 | 1772 * If we are detaching the original disk from a spare, then it implies |
| 1773 * that the spare should become a real disk, and be removed from the | |
| 1774 * active spare list for the pool. | |
| 1775 */ | |
| 1776 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1777 vd->vdev_id == 0) | |
| 1778 unspare = B_TRUE; | |
| 1779 | |
| 1780 /* | |
| 789 | 1781 * Erase the disk labels so the disk can be used for other things. |
| 1782 * This must be done after all other error cases are handled, | |
| 1783 * but before we disembowel vd (so we can still do I/O to it). | |
| 1784 * But if we can't do it, don't treat the error as fatal -- | |
| 1785 * it may be that the unwritability of the disk is the reason | |
| 1786 * it's being detached! | |
| 1787 */ | |
| 2082 | 1788 error = vdev_label_init(vd, 0, B_FALSE); |
| 789 | 1789 if (error) |
| 1790 dprintf("unable to erase labels on %s\n", vdev_description(vd)); | |
| 1791 | |
| 1792 /* | |
| 1793 * Remove vd from its parent and compact the parent's children. | |
| 1794 */ | |
| 1795 vdev_remove_child(pvd, vd); | |
| 1796 vdev_compact_children(pvd); | |
| 1797 | |
| 1798 /* | |
| 1799 * Remember one of the remaining children so we can get tvd below. | |
| 1800 */ | |
| 1801 cvd = pvd->vdev_child[0]; | |
| 1802 | |
| 1803 /* | |
| 2082 | 1804 * If we need to remove the remaining child from the list of hot spares, |
| 1805 * do it now, marking the vdev as no longer a spare in the process. We | |
| 1806 * must do this before vdev_remove_parent(), because that can change the | |
| 1807 * GUID if it creates a new toplevel GUID. | |
| 1808 */ | |
| 1809 if (unspare) { | |
| 1810 ASSERT(cvd->vdev_isspare); | |
| 1811 spa_spare_remove(cvd->vdev_guid); | |
| 1812 cvd->vdev_isspare = B_FALSE; | |
| 1813 unspare_guid = cvd->vdev_guid; | |
| 1814 } | |
| 1815 | |
| 1816 /* | |
| 789 | 1817 * If the parent mirror/replacing vdev only has one child, |
| 1818 * the parent is no longer needed. Remove it from the tree. | |
| 1819 */ | |
| 1820 if (pvd->vdev_children == 1) | |
| 1821 vdev_remove_parent(cvd); | |
| 1822 | |
| 1823 /* | |
| 1824 * We don't set tvd until now because the parent we just removed | |
| 1825 * may have been the previous top-level vdev. | |
| 1826 */ | |
| 1827 tvd = cvd->vdev_top; | |
| 1828 ASSERT(tvd->vdev_parent == rvd); | |
| 1829 | |
| 1830 /* | |
| 1831 * Reopen this top-level vdev to reassess health after detach. | |
| 1832 */ | |
| 1544 | 1833 vdev_reopen(tvd); |
| 789 | 1834 |
| 1835 /* | |
| 1836 * If the device we just detached was smaller than the others, | |
| 1732 | 1837 * it may be possible to add metaslabs (i.e. grow the pool). |
| 1838 * vdev_metaslab_init() can't fail because the existing metaslabs | |
| 1839 * are already in core, so there's nothing to read from disk. | |
| 789 | 1840 */ |
| 1732 | 1841 VERIFY(vdev_metaslab_init(tvd, txg) == 0); |
| 789 | 1842 |
| 1843 vdev_config_dirty(tvd); | |
| 1844 | |
| 1845 /* | |
| 1846 * Mark vd's DTL as dirty in this txg. | |
| 1847 * vdev_dtl_sync() will see that vd->vdev_detached is set | |
| 1848 * and free vd's DTL object in syncing context. | |
| 1849 * But first make sure we're not on any *other* txg's DTL list, | |
| 1850 * to prevent vd from being accessed after it's freed. | |
| 1851 */ | |
| 1852 for (t = 0; t < TXG_SIZE; t++) | |
| 1853 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); | |
| 1732 | 1854 vd->vdev_detached = B_TRUE; |
| 1855 vdev_dirty(tvd, VDD_DTL, vd, txg); | |
| 789 | 1856 |
| 1544 | 1857 dprintf("detached %s in txg %llu\n", vd->vdev_path, txg); |
| 789 | 1858 |
| 2082 | 1859 error = spa_vdev_exit(spa, vd, txg, 0); |
| 1860 | |
| 1861 /* | |
| 1862 * If we are supposed to remove the given vdev from the list of spares, | |
| 1863 * iterate over all pools in the system and replace it if it's present. | |
| 1864 */ | |
| 1865 if (unspare) { | |
| 1866 spa = NULL; | |
| 1867 mutex_enter(&spa_namespace_lock); | |
| 1868 while ((spa = spa_next(spa)) != NULL) { | |
| 1869 if (spa->spa_state != POOL_STATE_ACTIVE) | |
| 1870 continue; | |
| 1871 | |
| 1872 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); | |
| 1873 } | |
| 1874 mutex_exit(&spa_namespace_lock); | |
| 1875 } | |
| 1876 | |
| 1877 return (error); | |
| 1878 } | |
| 1879 | |
| 1880 /* | |
| 1881 * Remove a device from the pool. Currently, this supports removing only hot | |
| 1882 * spares. | |
| 1883 */ | |
| 1884 int | |
| 1885 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) | |
| 1886 { | |
| 1887 vdev_t *vd; | |
| 1888 nvlist_t **spares, *nv, **newspares; | |
| 1889 uint_t i, j, nspares; | |
| 1890 int ret = 0; | |
| 1891 | |
| 1892 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1893 | |
| 1894 vd = spa_lookup_by_guid(spa, guid); | |
| 1895 | |
| 1896 nv = NULL; | |
| 1897 if (spa->spa_spares != NULL && | |
| 1898 nvlist_lookup_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1899 &spares, &nspares) == 0) { | |
| 1900 for (i = 0; i < nspares; i++) { | |
| 1901 uint64_t theguid; | |
| 1902 | |
| 1903 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 1904 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 1905 if (theguid == guid) { | |
| 1906 nv = spares[i]; | |
| 1907 break; | |
| 1908 } | |
| 1909 } | |
| 1910 } | |
| 1911 | |
| 1912 /* | |
| 1913 * We only support removing a hot spare, and only if it's not currently | |
| 1914 * in use in this pool. | |
| 1915 */ | |
| 1916 if (nv == NULL && vd == NULL) { | |
| 1917 ret = ENOENT; | |
| 1918 goto out; | |
| 1919 } | |
| 1920 | |
| 1921 if (nv == NULL && vd != NULL) { | |
| 1922 ret = ENOTSUP; | |
| 1923 goto out; | |
| 1924 } | |
| 1925 | |
| 1926 if (!unspare && nv != NULL && vd != NULL) { | |
| 1927 ret = EBUSY; | |
| 1928 goto out; | |
| 1929 } | |
| 1930 | |
| 1931 if (nspares == 1) { | |
| 1932 newspares = NULL; | |
| 1933 } else { | |
| 1934 newspares = kmem_alloc((nspares - 1) * sizeof (void *), | |
| 1935 KM_SLEEP); | |
| 1936 for (i = 0, j = 0; i < nspares; i++) { | |
| 1937 if (spares[i] != nv) | |
| 1938 VERIFY(nvlist_dup(spares[i], | |
| 1939 &newspares[j++], KM_SLEEP) == 0); | |
| 1940 } | |
| 1941 } | |
| 1942 | |
| 1943 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1944 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1945 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 1946 newspares, nspares - 1) == 0); | |
| 1947 for (i = 0; i < nspares - 1; i++) | |
| 1948 nvlist_free(newspares[i]); | |
| 1949 kmem_free(newspares, (nspares - 1) * sizeof (void *)); | |
| 1950 spa_load_spares(spa); | |
| 1951 spa->spa_sync_spares = B_TRUE; | |
| 1952 | |
| 1953 out: | |
| 1954 spa_config_exit(spa, FTAG); | |
| 1955 | |
| 1956 return (ret); | |
| 789 | 1957 } |
| 1958 | |
| 1959 /* | |
| 1544 | 1960 * Find any device that's done replacing, so we can detach it. |
| 789 | 1961 */ |
| 1544 | 1962 static vdev_t * |
| 1963 spa_vdev_replace_done_hunt(vdev_t *vd) | |
| 789 | 1964 { |
| 1544 | 1965 vdev_t *newvd, *oldvd; |
| 789 | 1966 int c; |
| 1967 | |
| 1544 | 1968 for (c = 0; c < vd->vdev_children; c++) { |
| 1969 oldvd = spa_vdev_replace_done_hunt(vd->vdev_child[c]); | |
| 1970 if (oldvd != NULL) | |
| 1971 return (oldvd); | |
| 1972 } | |
| 789 | 1973 |
| 1974 if (vd->vdev_ops == &vdev_replacing_ops && vd->vdev_children == 2) { | |
| 1544 | 1975 oldvd = vd->vdev_child[0]; |
| 1976 newvd = vd->vdev_child[1]; | |
| 789 | 1977 |
| 1544 | 1978 mutex_enter(&newvd->vdev_dtl_lock); |
| 1979 if (newvd->vdev_dtl_map.sm_space == 0 && | |
| 1980 newvd->vdev_dtl_scrub.sm_space == 0) { | |
| 1981 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1982 return (oldvd); | |
| 1983 } | |
| 1984 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1985 } | |
| 789 | 1986 |
| 1544 | 1987 return (NULL); |
| 789 | 1988 } |
| 1989 | |
| 1544 | 1990 static void |
| 789 | 1991 spa_vdev_replace_done(spa_t *spa) |
| 1992 { | |
| 1544 | 1993 vdev_t *vd; |
| 2082 | 1994 vdev_t *pvd; |
| 1544 | 1995 uint64_t guid; |
| 2082 | 1996 uint64_t pguid = 0; |
| 789 | 1997 |
| 1544 | 1998 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 1999 |
| 1544 | 2000 while ((vd = spa_vdev_replace_done_hunt(spa->spa_root_vdev)) != NULL) { |
| 2001 guid = vd->vdev_guid; | |
| 2082 | 2002 /* |
| 2003 * If we have just finished replacing a hot spared device, then | |
| 2004 * we need to detach the parent's first child (the original hot | |
| 2005 * spare) as well. | |
| 2006 */ | |
| 2007 pvd = vd->vdev_parent; | |
| 2008 if (pvd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
| 2009 pvd->vdev_id == 0) { | |
| 2010 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); | |
| 2011 ASSERT(pvd->vdev_parent->vdev_children == 2); | |
| 2012 pguid = pvd->vdev_parent->vdev_child[1]->vdev_guid; | |
| 2013 } | |
| 1544 | 2014 spa_config_exit(spa, FTAG); |
| 2015 if (spa_vdev_detach(spa, guid, B_TRUE) != 0) | |
| 2016 return; | |
| 2082 | 2017 if (pguid != 0 && spa_vdev_detach(spa, pguid, B_TRUE) != 0) |
| 2018 return; | |
| 1544 | 2019 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2020 } |
| 2021 | |
| 1544 | 2022 spa_config_exit(spa, FTAG); |
| 789 | 2023 } |
| 2024 | |
| 2025 /* | |
|
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2026 * Update the stored path for this vdev. Dirty the vdev configuration, relying |
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2027 * on spa_vdev_enter/exit() to synchronize the labels and cache. |
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2028 */ |
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2029 int |
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2030 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) |
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2031 { |
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2032 vdev_t *rvd, *vd; |
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2033 uint64_t txg; |
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2034 |
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2035 rvd = spa->spa_root_vdev; |
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2036 |
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2037 txg = spa_vdev_enter(spa); |
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2038 |
| 2082 | 2039 if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) { |
| 2040 /* | |
| 2041 * Determine if this is a reference to a hot spare. In that | |
| 2042 * case, update the path as stored in the spare list. | |
| 2043 */ | |
| 2044 nvlist_t **spares; | |
| 2045 uint_t i, nspares; | |
| 2046 if (spa->spa_sparelist != NULL) { | |
| 2047 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 2048 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 2049 for (i = 0; i < nspares; i++) { | |
| 2050 uint64_t theguid; | |
| 2051 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 2052 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 2053 if (theguid == guid) | |
| 2054 break; | |
| 2055 } | |
| 2056 | |
| 2057 if (i == nspares) | |
| 2058 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2059 | |
| 2060 VERIFY(nvlist_add_string(spares[i], | |
| 2061 ZPOOL_CONFIG_PATH, newpath) == 0); | |
| 2062 spa_load_spares(spa); | |
| 2063 spa->spa_sync_spares = B_TRUE; | |
| 2064 return (spa_vdev_exit(spa, NULL, txg, 0)); | |
| 2065 } else { | |
| 2066 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2067 } | |
| 2068 } | |
|
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2069 |
|
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2070 if (!vd->vdev_ops->vdev_op_leaf) |
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2071 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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2072 |
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2073 spa_strfree(vd->vdev_path); |
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2074 vd->vdev_path = spa_strdup(newpath); |
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2075 |
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2076 vdev_config_dirty(vd->vdev_top); |
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2077 |
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2078 return (spa_vdev_exit(spa, NULL, txg, 0)); |
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2079 } |
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2080 |
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2081 /* |
| 789 | 2082 * ========================================================================== |
| 2083 * SPA Scrubbing | |
| 2084 * ========================================================================== | |
| 2085 */ | |
| 2086 | |
| 1544 | 2087 void |
| 2088 spa_scrub_throttle(spa_t *spa, int direction) | |
| 2089 { | |
| 2090 mutex_enter(&spa->spa_scrub_lock); | |
| 2091 spa->spa_scrub_throttled += direction; | |
| 2092 ASSERT(spa->spa_scrub_throttled >= 0); | |
| 2093 if (spa->spa_scrub_throttled == 0) | |
| 2094 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 2095 mutex_exit(&spa->spa_scrub_lock); | |
| 2096 } | |
| 789 | 2097 |
| 2098 static void | |
| 2099 spa_scrub_io_done(zio_t *zio) | |
| 2100 { | |
| 2101 spa_t *spa = zio->io_spa; | |
| 2102 | |
| 2103 zio_buf_free(zio->io_data, zio->io_size); | |
| 2104 | |
| 2105 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2106 if (zio->io_error && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { |
|
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2107 vdev_t *vd = zio->io_vd ? zio->io_vd : spa->spa_root_vdev; |
| 789 | 2108 spa->spa_scrub_errors++; |
| 2109 mutex_enter(&vd->vdev_stat_lock); | |
| 2110 vd->vdev_stat.vs_scrub_errors++; | |
| 2111 mutex_exit(&vd->vdev_stat_lock); | |
| 2112 } | |
| 1544 | 2113 if (--spa->spa_scrub_inflight == 0) { |
| 2114 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 2115 ASSERT(spa->spa_scrub_throttled == 0); | |
| 2116 } | |
| 2117 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 2118 } |
| 2119 | |
| 2120 static void | |
| 1544 | 2121 spa_scrub_io_start(spa_t *spa, blkptr_t *bp, int priority, int flags, |
| 2122 zbookmark_t *zb) | |
| 789 | 2123 { |
| 2124 size_t size = BP_GET_LSIZE(bp); | |
| 2125 void *data = zio_buf_alloc(size); | |
| 2126 | |
| 2127 mutex_enter(&spa->spa_scrub_lock); | |
| 2128 spa->spa_scrub_inflight++; | |
| 2129 mutex_exit(&spa->spa_scrub_lock); | |
| 2130 | |
| 1544 | 2131 if (zb->zb_level == -1 && BP_GET_TYPE(bp) != DMU_OT_OBJSET) |
| 2132 flags |= ZIO_FLAG_SPECULATIVE; /* intent log block */ | |
| 2133 | |
|
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2134 flags |= ZIO_FLAG_SCRUB_THREAD | ZIO_FLAG_CANFAIL; |
| 1544 | 2135 |
| 789 | 2136 zio_nowait(zio_read(NULL, spa, bp, data, size, |
| 1544 | 2137 spa_scrub_io_done, NULL, priority, flags, zb)); |
| 789 | 2138 } |
| 2139 | |
| 2140 /* ARGSUSED */ | |
| 2141 static int | |
| 2142 spa_scrub_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a) | |
| 2143 { | |
| 2144 blkptr_t *bp = &bc->bc_blkptr; | |
|
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2145 vdev_t *vd = spa->spa_root_vdev; |
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2146 dva_t *dva = bp->blk_dva; |
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2147 int needs_resilver = B_FALSE; |
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2148 int d; |
| 789 | 2149 |
|
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2150 if (bc->bc_errno) { |
| 789 | 2151 /* |
| 2152 * We can't scrub this block, but we can continue to scrub | |
| 2153 * the rest of the pool. Note the error and move along. | |
| 2154 */ | |
| 2155 mutex_enter(&spa->spa_scrub_lock); | |
| 2156 spa->spa_scrub_errors++; | |
| 2157 mutex_exit(&spa->spa_scrub_lock); | |
| 2158 | |
|
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2159 mutex_enter(&vd->vdev_stat_lock); |
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2160 vd->vdev_stat.vs_scrub_errors++; |
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2161 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2162 |
| 2163 return (ERESTART); | |
| 2164 } | |
| 2165 | |
| 2166 ASSERT(bp->blk_birth < spa->spa_scrub_maxtxg); | |
| 2167 | |
|
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2168 for (d = 0; d < BP_GET_NDVAS(bp); d++) { |
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2169 vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dva[d])); |
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2170 |
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2171 ASSERT(vd != NULL); |
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2172 |
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2173 /* |
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2174 * Keep track of how much data we've examined so that |
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2175 * zpool(1M) status can make useful progress reports. |
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2176 */ |
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2177 mutex_enter(&vd->vdev_stat_lock); |
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2178 vd->vdev_stat.vs_scrub_examined += DVA_GET_ASIZE(&dva[d]); |
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2179 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2180 |
|
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2181 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER) { |
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2182 if (DVA_GET_GANG(&dva[d])) { |
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2183 /* |
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2184 * Gang members may be spread across multiple |
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2185 * vdevs, so the best we can do is look at the |
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2186 * pool-wide DTL. |
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2187 * XXX -- it would be better to change our |
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2188 * allocation policy to ensure that this can't |
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2189 * happen. |
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2190 */ |
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2191 vd = spa->spa_root_vdev; |
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2192 } |
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2193 if (vdev_dtl_contains(&vd->vdev_dtl_map, |
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2194 bp->blk_birth, 1)) |
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2195 needs_resilver = B_TRUE; |
| 789 | 2196 } |
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2197 } |
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2198 |
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2199 if (spa->spa_scrub_type == POOL_SCRUB_EVERYTHING) |
| 789 | 2200 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_SCRUB, |
| 1544 | 2201 ZIO_FLAG_SCRUB, &bc->bc_bookmark); |
|
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2202 else if (needs_resilver) |
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2203 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_RESILVER, |
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2204 ZIO_FLAG_RESILVER, &bc->bc_bookmark); |
| 789 | 2205 |
| 2206 return (0); | |
| 2207 } | |
| 2208 | |
| 2209 static void | |
| 2210 spa_scrub_thread(spa_t *spa) | |
| 2211 { | |
| 2212 callb_cpr_t cprinfo; | |
| 2213 traverse_handle_t *th = spa->spa_scrub_th; | |
| 2214 vdev_t *rvd = spa->spa_root_vdev; | |
| 2215 pool_scrub_type_t scrub_type = spa->spa_scrub_type; | |
| 2216 int error = 0; | |
| 2217 boolean_t complete; | |
| 2218 | |
| 2219 CALLB_CPR_INIT(&cprinfo, &spa->spa_scrub_lock, callb_generic_cpr, FTAG); | |
| 2220 | |
|
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2221 /* |
|
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2222 * If we're restarting due to a snapshot create/delete, |
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2223 * wait for that to complete. |
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2224 */ |
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2225 txg_wait_synced(spa_get_dsl(spa), 0); |
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2226 |
| 1544 | 2227 dprintf("start %s mintxg=%llu maxtxg=%llu\n", |
| 2228 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 2229 spa->spa_scrub_mintxg, spa->spa_scrub_maxtxg); | |
| 2230 | |
| 2231 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2232 vdev_reopen(rvd); /* purge all vdev caches */ | |
| 789 | 2233 vdev_config_dirty(rvd); /* rewrite all disk labels */ |
| 2234 vdev_scrub_stat_update(rvd, scrub_type, B_FALSE); | |
| 1544 | 2235 spa_config_exit(spa, FTAG); |
| 789 | 2236 |
| 2237 mutex_enter(&spa->spa_scrub_lock); | |
| 2238 spa->spa_scrub_errors = 0; | |
| 2239 spa->spa_scrub_active = 1; | |
| 1544 | 2240 ASSERT(spa->spa_scrub_inflight == 0); |
| 2241 ASSERT(spa->spa_scrub_throttled == 0); | |
| 789 | 2242 |
| 2243 while (!spa->spa_scrub_stop) { | |
| 2244 CALLB_CPR_SAFE_BEGIN(&cprinfo); | |
| 1544 | 2245 while (spa->spa_scrub_suspended) { |
| 789 | 2246 spa->spa_scrub_active = 0; |
| 2247 cv_broadcast(&spa->spa_scrub_cv); | |
| 2248 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2249 spa->spa_scrub_active = 1; | |
| 2250 } | |
| 2251 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_scrub_lock); | |
| 2252 | |
| 2253 if (spa->spa_scrub_restart_txg != 0) | |
| 2254 break; | |
| 2255 | |
| 2256 mutex_exit(&spa->spa_scrub_lock); | |
| 2257 error = traverse_more(th); | |
| 2258 mutex_enter(&spa->spa_scrub_lock); | |
| 2259 if (error != EAGAIN) | |
| 2260 break; | |
| 1544 | 2261 |
| 2262 while (spa->spa_scrub_throttled > 0) | |
| 2263 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 789 | 2264 } |
| 2265 | |
| 2266 while (spa->spa_scrub_inflight) | |
| 2267 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2268 | |
|
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2269 spa->spa_scrub_active = 0; |
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2270 cv_broadcast(&spa->spa_scrub_cv); |
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2271 |
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2272 mutex_exit(&spa->spa_scrub_lock); |
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2273 |
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2274 spa_config_enter(spa, RW_WRITER, FTAG); |
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2275 |
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2276 mutex_enter(&spa->spa_scrub_lock); |
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2277 |
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2278 /* |
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2279 * Note: we check spa_scrub_restart_txg under both spa_scrub_lock |
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2280 * AND the spa config lock to synchronize with any config changes |
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2281 * that revise the DTLs under spa_vdev_enter() / spa_vdev_exit(). |
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2282 */ |
| 789 | 2283 if (spa->spa_scrub_restart_txg != 0) |
| 2284 error = ERESTART; | |
| 2285 | |
| 1544 | 2286 if (spa->spa_scrub_stop) |
| 2287 error = EINTR; | |
| 2288 | |
| 789 | 2289 /* |
| 1544 | 2290 * Even if there were uncorrectable errors, we consider the scrub |
| 2291 * completed. The downside is that if there is a transient error during | |
| 2292 * a resilver, we won't resilver the data properly to the target. But | |
| 2293 * if the damage is permanent (more likely) we will resilver forever, | |
| 2294 * which isn't really acceptable. Since there is enough information for | |
| 2295 * the user to know what has failed and why, this seems like a more | |
| 2296 * tractable approach. | |
| 789 | 2297 */ |
| 1544 | 2298 complete = (error == 0); |
| 789 | 2299 |
| 1544 | 2300 dprintf("end %s to maxtxg=%llu %s, traverse=%d, %llu errors, stop=%u\n", |
| 2301 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 789 | 2302 spa->spa_scrub_maxtxg, complete ? "done" : "FAILED", |
| 2303 error, spa->spa_scrub_errors, spa->spa_scrub_stop); | |
| 2304 | |
| 2305 mutex_exit(&spa->spa_scrub_lock); | |
| 2306 | |
| 2307 /* | |
| 2308 * If the scrub/resilver completed, update all DTLs to reflect this. | |
| 2309 * Whether it succeeded or not, vacate all temporary scrub DTLs. | |
| 2310 */ | |
| 2311 vdev_dtl_reassess(rvd, spa_last_synced_txg(spa) + 1, | |
| 2312 complete ? spa->spa_scrub_maxtxg : 0, B_TRUE); | |
| 2313 vdev_scrub_stat_update(rvd, POOL_SCRUB_NONE, complete); | |
| 1544 | 2314 spa_errlog_rotate(spa); |
|
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2315 |
| 1544 | 2316 spa_config_exit(spa, FTAG); |
| 789 | 2317 |
| 2318 mutex_enter(&spa->spa_scrub_lock); | |
| 2319 | |
| 1544 | 2320 /* |
| 2321 * We may have finished replacing a device. | |
| 2322 * Let the async thread assess this and handle the detach. | |
| 2323 */ | |
| 2324 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); | |
| 789 | 2325 |
| 2326 /* | |
| 2327 * If we were told to restart, our final act is to start a new scrub. | |
| 2328 */ | |
| 2329 if (error == ERESTART) | |
| 1544 | 2330 spa_async_request(spa, scrub_type == POOL_SCRUB_RESILVER ? |
| 2331 SPA_ASYNC_RESILVER : SPA_ASYNC_SCRUB); | |
| 789 | 2332 |
| 1544 | 2333 spa->spa_scrub_type = POOL_SCRUB_NONE; |
| 2334 spa->spa_scrub_active = 0; | |
| 2335 spa->spa_scrub_thread = NULL; | |
| 2336 cv_broadcast(&spa->spa_scrub_cv); | |
| 789 | 2337 CALLB_CPR_EXIT(&cprinfo); /* drops &spa->spa_scrub_lock */ |
| 2338 thread_exit(); | |
| 2339 } | |
| 2340 | |
| 2341 void | |
| 2342 spa_scrub_suspend(spa_t *spa) | |
| 2343 { | |
| 2344 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2345 spa->spa_scrub_suspended++; |
| 789 | 2346 while (spa->spa_scrub_active) { |
| 2347 cv_broadcast(&spa->spa_scrub_cv); | |
| 2348 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2349 } | |
| 2350 while (spa->spa_scrub_inflight) | |
| 2351 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2352 mutex_exit(&spa->spa_scrub_lock); | |
| 2353 } | |
| 2354 | |
| 2355 void | |
| 2356 spa_scrub_resume(spa_t *spa) | |
| 2357 { | |
| 2358 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2359 ASSERT(spa->spa_scrub_suspended != 0); |
| 2360 if (--spa->spa_scrub_suspended == 0) | |
| 789 | 2361 cv_broadcast(&spa->spa_scrub_cv); |
| 2362 mutex_exit(&spa->spa_scrub_lock); | |
| 2363 } | |
| 2364 | |
| 2365 void | |
| 2366 spa_scrub_restart(spa_t *spa, uint64_t txg) | |
| 2367 { | |
| 2368 /* | |
| 2369 * Something happened (e.g. snapshot create/delete) that means | |
| 2370 * we must restart any in-progress scrubs. The itinerary will | |
| 2371 * fix this properly. | |
| 2372 */ | |
| 2373 mutex_enter(&spa->spa_scrub_lock); | |
| 2374 spa->spa_scrub_restart_txg = txg; | |
| 2375 mutex_exit(&spa->spa_scrub_lock); | |
| 2376 } | |
| 2377 | |
| 1544 | 2378 int |
| 2379 spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force) | |
| 789 | 2380 { |
| 2381 space_seg_t *ss; | |
| 2382 uint64_t mintxg, maxtxg; | |
| 2383 vdev_t *rvd = spa->spa_root_vdev; | |
| 2384 | |
| 2385 if ((uint_t)type >= POOL_SCRUB_TYPES) | |
| 2386 return (ENOTSUP); | |
| 2387 | |
| 1544 | 2388 mutex_enter(&spa->spa_scrub_lock); |
| 2389 | |
| 789 | 2390 /* |
| 2391 * If there's a scrub or resilver already in progress, stop it. | |
| 2392 */ | |
| 2393 while (spa->spa_scrub_thread != NULL) { | |
| 2394 /* | |
| 2395 * Don't stop a resilver unless forced. | |
| 2396 */ | |
| 1544 | 2397 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER && !force) { |
| 2398 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 2399 return (EBUSY); |
| 1544 | 2400 } |
| 789 | 2401 spa->spa_scrub_stop = 1; |
| 2402 cv_broadcast(&spa->spa_scrub_cv); | |
| 2403 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2404 } | |
| 2405 | |
| 2406 /* | |
| 2407 * Terminate the previous traverse. | |
| 2408 */ | |
| 2409 if (spa->spa_scrub_th != NULL) { | |
| 2410 traverse_fini(spa->spa_scrub_th); | |
| 2411 spa->spa_scrub_th = NULL; | |
| 2412 } | |
| 2413 | |
| 1544 | 2414 if (rvd == NULL) { |
| 2415 ASSERT(spa->spa_scrub_stop == 0); | |
| 2416 ASSERT(spa->spa_scrub_type == type); | |
| 2417 ASSERT(spa->spa_scrub_restart_txg == 0); | |
| 2418 mutex_exit(&spa->spa_scrub_lock); | |
| 2419 return (0); | |
| 2420 } | |
| 789 | 2421 |
| 2422 mintxg = TXG_INITIAL - 1; | |
| 2423 maxtxg = spa_last_synced_txg(spa) + 1; | |
| 2424 | |
| 1544 | 2425 mutex_enter(&rvd->vdev_dtl_lock); |
| 789 | 2426 |
| 1544 | 2427 if (rvd->vdev_dtl_map.sm_space == 0) { |
| 2428 /* | |
| 2429 * The pool-wide DTL is empty. | |
| 1732 | 2430 * If this is a resilver, there's nothing to do except |
| 2431 * check whether any in-progress replacements have completed. | |
| 1544 | 2432 */ |
| 1732 | 2433 if (type == POOL_SCRUB_RESILVER) { |
| 1544 | 2434 type = POOL_SCRUB_NONE; |
| 1732 | 2435 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); |
| 2436 } | |
| 1544 | 2437 } else { |
| 2438 /* | |
| 2439 * The pool-wide DTL is non-empty. | |
| 2440 * If this is a normal scrub, upgrade to a resilver instead. | |
| 2441 */ | |
| 2442 if (type == POOL_SCRUB_EVERYTHING) | |
| 2443 type = POOL_SCRUB_RESILVER; | |
| 2444 } | |
| 789 | 2445 |
| 1544 | 2446 if (type == POOL_SCRUB_RESILVER) { |
| 789 | 2447 /* |
| 2448 * Determine the resilvering boundaries. | |
| 2449 * | |
| 2450 * Note: (mintxg, maxtxg) is an open interval, | |
| 2451 * i.e. mintxg and maxtxg themselves are not included. | |
| 2452 * | |
| 2453 * Note: for maxtxg, we MIN with spa_last_synced_txg(spa) + 1 | |
| 2454 * so we don't claim to resilver a txg that's still changing. | |
| 2455 */ | |
| 2456 ss = avl_first(&rvd->vdev_dtl_map.sm_root); | |
| 1544 | 2457 mintxg = ss->ss_start - 1; |
| 789 | 2458 ss = avl_last(&rvd->vdev_dtl_map.sm_root); |
| 1544 | 2459 maxtxg = MIN(ss->ss_end, maxtxg); |
| 789 | 2460 } |
| 2461 | |
| 1544 | 2462 mutex_exit(&rvd->vdev_dtl_lock); |
| 2463 | |
| 2464 spa->spa_scrub_stop = 0; | |
| 2465 spa->spa_scrub_type = type; | |
| 2466 spa->spa_scrub_restart_txg = 0; | |
| 2467 | |
| 2468 if (type != POOL_SCRUB_NONE) { | |
| 2469 spa->spa_scrub_mintxg = mintxg; | |
| 789 | 2470 spa->spa_scrub_maxtxg = maxtxg; |
| 2471 spa->spa_scrub_th = traverse_init(spa, spa_scrub_cb, NULL, | |
|
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2472 ADVANCE_PRE | ADVANCE_PRUNE | ADVANCE_ZIL, |
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2473 ZIO_FLAG_CANFAIL); |
| 789 | 2474 traverse_add_pool(spa->spa_scrub_th, mintxg, maxtxg); |
| 2475 spa->spa_scrub_thread = thread_create(NULL, 0, | |
| 2476 spa_scrub_thread, spa, 0, &p0, TS_RUN, minclsyspri); | |
| 2477 } | |
| 2478 | |
| 1544 | 2479 mutex_exit(&spa->spa_scrub_lock); |
| 2480 | |
| 789 | 2481 return (0); |
| 2482 } | |
| 2483 | |
| 1544 | 2484 /* |
| 2485 * ========================================================================== | |
| 2486 * SPA async task processing | |
| 2487 * ========================================================================== | |
| 2488 */ | |
| 2489 | |
| 2490 static void | |
| 2491 spa_async_reopen(spa_t *spa) | |
| 789 | 2492 { |
| 1544 | 2493 vdev_t *rvd = spa->spa_root_vdev; |
| 2494 vdev_t *tvd; | |
| 2495 int c; | |
| 2496 | |
| 2497 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2498 | |
| 2499 for (c = 0; c < rvd->vdev_children; c++) { | |
| 2500 tvd = rvd->vdev_child[c]; | |
| 2501 if (tvd->vdev_reopen_wanted) { | |
| 2502 tvd->vdev_reopen_wanted = 0; | |
| 2503 vdev_reopen(tvd); | |
| 2504 } | |
| 2505 } | |
| 789 | 2506 |
| 1544 | 2507 spa_config_exit(spa, FTAG); |
| 2508 } | |
| 2509 | |
| 2510 static void | |
| 2511 spa_async_thread(spa_t *spa) | |
| 2512 { | |
| 2513 int tasks; | |
| 2514 | |
| 2515 ASSERT(spa->spa_sync_on); | |
| 789 | 2516 |
| 1544 | 2517 mutex_enter(&spa->spa_async_lock); |
| 2518 tasks = spa->spa_async_tasks; | |
| 2519 spa->spa_async_tasks = 0; | |
| 2520 mutex_exit(&spa->spa_async_lock); | |
| 2521 | |
| 2522 /* | |
|
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2523 * See if the config needs to be updated. |
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2524 */ |
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2525 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { |
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2526 mutex_enter(&spa_namespace_lock); |
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2527 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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2528 mutex_exit(&spa_namespace_lock); |
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2529 } |
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2530 |
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2531 /* |
| 1544 | 2532 * See if any devices need to be reopened. |
| 2533 */ | |
| 2534 if (tasks & SPA_ASYNC_REOPEN) | |
| 2535 spa_async_reopen(spa); | |
| 2536 | |
| 2537 /* | |
| 2538 * If any devices are done replacing, detach them. | |
| 2539 */ | |
| 2540 if (tasks & SPA_ASYNC_REPLACE_DONE) | |
| 789 | 2541 spa_vdev_replace_done(spa); |
| 2542 | |
| 1544 | 2543 /* |
| 2544 * Kick off a scrub. | |
| 2545 */ | |
| 2546 if (tasks & SPA_ASYNC_SCRUB) | |
| 2547 VERIFY(spa_scrub(spa, POOL_SCRUB_EVERYTHING, B_TRUE) == 0); | |
| 2548 | |
| 2549 /* | |
| 2550 * Kick off a resilver. | |
| 2551 */ | |
| 2552 if (tasks & SPA_ASYNC_RESILVER) | |
| 2553 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 2554 | |
| 2555 /* | |
| 2556 * Let the world know that we're done. | |
| 2557 */ | |
| 2558 mutex_enter(&spa->spa_async_lock); | |
| 2559 spa->spa_async_thread = NULL; | |
| 2560 cv_broadcast(&spa->spa_async_cv); | |
| 2561 mutex_exit(&spa->spa_async_lock); | |
| 2562 thread_exit(); | |
| 2563 } | |
| 2564 | |
| 2565 void | |
| 2566 spa_async_suspend(spa_t *spa) | |
| 2567 { | |
| 2568 mutex_enter(&spa->spa_async_lock); | |
| 2569 spa->spa_async_suspended++; | |
| 2570 while (spa->spa_async_thread != NULL) | |
| 2571 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); | |
| 2572 mutex_exit(&spa->spa_async_lock); | |
| 2573 } | |
| 2574 | |
| 2575 void | |
| 2576 spa_async_resume(spa_t *spa) | |
| 2577 { | |
| 2578 mutex_enter(&spa->spa_async_lock); | |
| 2579 ASSERT(spa->spa_async_suspended != 0); | |
| 2580 spa->spa_async_suspended--; | |
| 2581 mutex_exit(&spa->spa_async_lock); | |
| 2582 } | |
| 2583 | |
| 2584 static void | |
| 2585 spa_async_dispatch(spa_t *spa) | |
| 2586 { | |
| 2587 mutex_enter(&spa->spa_async_lock); | |
| 2588 if (spa->spa_async_tasks && !spa->spa_async_suspended && | |
|
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2589 spa->spa_async_thread == NULL && |
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2590 rootdir != NULL && !vn_is_readonly(rootdir)) |
| 1544 | 2591 spa->spa_async_thread = thread_create(NULL, 0, |
| 2592 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); | |
| 2593 mutex_exit(&spa->spa_async_lock); | |
| 2594 } | |
| 2595 | |
| 2596 void | |
| 2597 spa_async_request(spa_t *spa, int task) | |
| 2598 { | |
| 2599 mutex_enter(&spa->spa_async_lock); | |
| 2600 spa->spa_async_tasks |= task; | |
| 2601 mutex_exit(&spa->spa_async_lock); | |
| 789 | 2602 } |
| 2603 | |
| 2604 /* | |
| 2605 * ========================================================================== | |
| 2606 * SPA syncing routines | |
| 2607 * ========================================================================== | |
| 2608 */ | |
| 2609 | |
| 2610 static void | |
| 2611 spa_sync_deferred_frees(spa_t *spa, uint64_t txg) | |
| 2612 { | |
| 2613 bplist_t *bpl = &spa->spa_sync_bplist; | |
| 2614 dmu_tx_t *tx; | |
| 2615 blkptr_t blk; | |
| 2616 uint64_t itor = 0; | |
| 2617 zio_t *zio; | |
| 2618 int error; | |
| 2619 uint8_t c = 1; | |
| 2620 | |
| 2621 zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CONFIG_HELD); | |
| 2622 | |
| 2623 while (bplist_iterate(bpl, &itor, &blk) == 0) | |
| 2624 zio_nowait(zio_free(zio, spa, txg, &blk, NULL, NULL)); | |
| 2625 | |
| 2626 error = zio_wait(zio); | |
| 2627 ASSERT3U(error, ==, 0); | |
| 2628 | |
| 2629 tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
| 2630 bplist_vacate(bpl, tx); | |
| 2631 | |
| 2632 /* | |
| 2633 * Pre-dirty the first block so we sync to convergence faster. | |
| 2634 * (Usually only the first block is needed.) | |
| 2635 */ | |
| 2636 dmu_write(spa->spa_meta_objset, spa->spa_sync_bplist_obj, 0, 1, &c, tx); | |
| 2637 dmu_tx_commit(tx); | |
| 2638 } | |
| 2639 | |
| 2640 static void | |
| 2082 | 2641 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) |
| 2642 { | |
| 2643 char *packed = NULL; | |
| 2644 size_t nvsize = 0; | |
| 2645 dmu_buf_t *db; | |
| 2646 | |
| 2647 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); | |
| 2648 | |
| 2649 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 2650 | |
| 2651 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, | |
| 2652 KM_SLEEP) == 0); | |
| 2653 | |
| 2654 dmu_write(spa->spa_meta_objset, obj, 0, nvsize, packed, tx); | |
| 2655 | |
| 2656 kmem_free(packed, nvsize); | |
| 2657 | |
| 2658 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 2659 dmu_buf_will_dirty(db, tx); | |
| 2660 *(uint64_t *)db->db_data = nvsize; | |
| 2661 dmu_buf_rele(db, FTAG); | |
| 2662 } | |
| 2663 | |
| 2664 static void | |
| 2665 spa_sync_spares(spa_t *spa, dmu_tx_t *tx) | |
| 2666 { | |
| 2667 nvlist_t *nvroot; | |
| 2668 nvlist_t **spares; | |
| 2669 int i; | |
| 2670 | |
| 2671 if (!spa->spa_sync_spares) | |
| 2672 return; | |
| 2673 | |
| 2674 /* | |
| 2675 * Update the MOS nvlist describing the list of available spares. | |
| 2676 * spa_validate_spares() will have already made sure this nvlist is | |
| 2677 * valid and the vdevs are labelled appropriately. | |
| 2678 */ | |
| 2679 if (spa->spa_spares_object == 0) { | |
| 2680 spa->spa_spares_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 2681 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 2682 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 2683 VERIFY(zap_update(spa->spa_meta_objset, | |
| 2684 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SPARES, | |
| 2685 sizeof (uint64_t), 1, &spa->spa_spares_object, tx) == 0); | |
| 2686 } | |
| 2687 | |
| 2688 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 2689 if (spa->spa_nspares == 0) { | |
| 2690 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2691 NULL, 0) == 0); | |
| 2692 } else { | |
| 2693 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), | |
| 2694 KM_SLEEP); | |
| 2695 for (i = 0; i < spa->spa_nspares; i++) | |
| 2696 spares[i] = vdev_config_generate(spa, | |
| 2697 spa->spa_spares[i], B_FALSE, B_TRUE); | |
| 2698 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2699 spares, spa->spa_nspares) == 0); | |
| 2700 for (i = 0; i < spa->spa_nspares; i++) | |
| 2701 nvlist_free(spares[i]); | |
| 2702 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 2703 } | |
| 2704 | |
| 2705 spa_sync_nvlist(spa, spa->spa_spares_object, nvroot, tx); | |
| 2706 | |
| 2707 spa->spa_sync_spares = B_FALSE; | |
| 2708 } | |
| 2709 | |
| 2710 static void | |
| 789 | 2711 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) |
| 2712 { | |
| 2713 nvlist_t *config; | |
| 2714 | |
| 2715 if (list_is_empty(&spa->spa_dirty_list)) | |
| 2716 return; | |
| 2717 | |
| 2718 config = spa_config_generate(spa, NULL, dmu_tx_get_txg(tx), B_FALSE); | |
| 2719 | |
|
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2720 if (spa->spa_config_syncing) |
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2721 nvlist_free(spa->spa_config_syncing); |
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2722 spa->spa_config_syncing = config; |
| 789 | 2723 |
| 2082 | 2724 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); |
| 789 | 2725 } |
| 2726 | |
| 2727 /* | |
| 2728 * Sync the specified transaction group. New blocks may be dirtied as | |
| 2729 * part of the process, so we iterate until it converges. | |
| 2730 */ | |
| 2731 void | |
| 2732 spa_sync(spa_t *spa, uint64_t txg) | |
| 2733 { | |
| 2734 dsl_pool_t *dp = spa->spa_dsl_pool; | |
| 2735 objset_t *mos = spa->spa_meta_objset; | |
| 2736 bplist_t *bpl = &spa->spa_sync_bplist; | |
|
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2737 vdev_t *rvd = spa->spa_root_vdev; |
| 789 | 2738 vdev_t *vd; |
| 2739 dmu_tx_t *tx; | |
| 2740 int dirty_vdevs; | |
| 2741 | |
| 2742 /* | |
| 2743 * Lock out configuration changes. | |
| 2744 */ | |
| 1544 | 2745 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2746 |
| 2747 spa->spa_syncing_txg = txg; | |
| 2748 spa->spa_sync_pass = 0; | |
| 2749 | |
| 1544 | 2750 VERIFY(0 == bplist_open(bpl, mos, spa->spa_sync_bplist_obj)); |
| 789 | 2751 |
| 2082 | 2752 tx = dmu_tx_create_assigned(dp, txg); |
| 2753 | |
| 2754 /* | |
| 2755 * If we are upgrading to ZFS_VERSION_RAIDZ_DEFLATE this txg, | |
| 2756 * set spa_deflate if we have no raid-z vdevs. | |
| 2757 */ | |
| 2758 if (spa->spa_ubsync.ub_version < ZFS_VERSION_RAIDZ_DEFLATE && | |
| 2759 spa->spa_uberblock.ub_version >= ZFS_VERSION_RAIDZ_DEFLATE) { | |
| 2760 int i; | |
| 2761 | |
| 2762 for (i = 0; i < rvd->vdev_children; i++) { | |
| 2763 vd = rvd->vdev_child[i]; | |
| 2764 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) | |
| 2765 break; | |
| 2766 } | |
| 2767 if (i == rvd->vdev_children) { | |
| 2768 spa->spa_deflate = TRUE; | |
| 2769 VERIFY(0 == zap_add(spa->spa_meta_objset, | |
| 2770 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 2771 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); | |
| 2772 } | |
| 2773 } | |
| 2774 | |
| 789 | 2775 /* |
| 2776 * If anything has changed in this txg, push the deferred frees | |
| 2777 * from the previous txg. If not, leave them alone so that we | |
| 2778 * don't generate work on an otherwise idle system. | |
| 2779 */ | |
| 2780 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || | |
| 2781 !txg_list_empty(&dp->dp_dirty_dirs, txg)) | |
| 2782 spa_sync_deferred_frees(spa, txg); | |
| 2783 | |
| 2784 /* | |
| 2785 * Iterate to convergence. | |
| 2786 */ | |
| 2787 do { | |
| 2788 spa->spa_sync_pass++; | |
| 2789 | |
| 2790 spa_sync_config_object(spa, tx); | |
| 2082 | 2791 spa_sync_spares(spa, tx); |
| 1544 | 2792 spa_errlog_sync(spa, txg); |
| 789 | 2793 dsl_pool_sync(dp, txg); |
| 2794 | |
| 2795 dirty_vdevs = 0; | |
| 2796 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) { | |
| 2797 vdev_sync(vd, txg); | |
| 2798 dirty_vdevs++; | |
| 2799 } | |
| 2800 | |
| 2801 bplist_sync(bpl, tx); | |
| 2802 } while (dirty_vdevs); | |
| 2803 | |
| 2804 bplist_close(bpl); | |
| 2805 | |
| 2806 dprintf("txg %llu passes %d\n", txg, spa->spa_sync_pass); | |
| 2807 | |
| 2808 /* | |
| 2809 * Rewrite the vdev configuration (which includes the uberblock) | |
| 2810 * to commit the transaction group. | |
|
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2811 * |
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2812 * If there are any dirty vdevs, sync the uberblock to all vdevs. |
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2813 * Otherwise, pick a random top-level vdev that's known to be |
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2814 * visible in the config cache (see spa_vdev_add() for details). |
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2815 * If the write fails, try the next vdev until we're tried them all. |
| 789 | 2816 */ |
|
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2817 if (!list_is_empty(&spa->spa_dirty_list)) { |
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2818 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2819 } else { |
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2820 int children = rvd->vdev_children; |
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2821 int c0 = spa_get_random(children); |
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2822 int c; |
|
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2823 |
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2824 for (c = 0; c < children; c++) { |
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2825 vd = rvd->vdev_child[(c0 + c) % children]; |
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2826 if (vd->vdev_ms_array == 0) |
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2827 continue; |
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2828 if (vdev_config_sync(vd, txg) == 0) |
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2829 break; |
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2830 } |
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2831 if (c == children) |
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2832 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2833 } |
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2834 |
| 2082 | 2835 dmu_tx_commit(tx); |
| 2836 | |
|
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2837 /* |
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2838 * Clear the dirty config list. |
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2839 */ |
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2840 while ((vd = list_head(&spa->spa_dirty_list)) != NULL) |
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2841 vdev_config_clean(vd); |
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2842 |
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2843 /* |
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2844 * Now that the new config has synced transactionally, |
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2845 * let it become visible to the config cache. |
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2846 */ |
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2847 if (spa->spa_config_syncing != NULL) { |
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2848 spa_config_set(spa, spa->spa_config_syncing); |
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2849 spa->spa_config_txg = txg; |
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2850 spa->spa_config_syncing = NULL; |
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2851 } |
| 789 | 2852 |
| 2853 /* | |
| 2854 * Make a stable copy of the fully synced uberblock. | |
| 2855 * We use this as the root for pool traversals. | |
| 2856 */ | |
| 2857 spa->spa_traverse_wanted = 1; /* tells traverse_more() to stop */ | |
| 2858 | |
| 2859 spa_scrub_suspend(spa); /* stop scrubbing and finish I/Os */ | |
| 2860 | |
| 2861 rw_enter(&spa->spa_traverse_lock, RW_WRITER); | |
| 2862 spa->spa_traverse_wanted = 0; | |
| 2863 spa->spa_ubsync = spa->spa_uberblock; | |
| 2864 rw_exit(&spa->spa_traverse_lock); | |
| 2865 | |
| 2866 spa_scrub_resume(spa); /* resume scrub with new ubsync */ | |
| 2867 | |
| 2868 /* | |
| 2869 * Clean up the ZIL records for the synced txg. | |
| 2870 */ | |
| 2871 dsl_pool_zil_clean(dp); | |
| 2872 | |
| 2873 /* | |
| 2874 * Update usable space statistics. | |
| 2875 */ | |
| 2876 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) | |
| 2877 vdev_sync_done(vd, txg); | |
| 2878 | |
| 2879 /* | |
| 2880 * It had better be the case that we didn't dirty anything | |
| 2082 | 2881 * since vdev_config_sync(). |
| 789 | 2882 */ |
| 2883 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); | |
| 2884 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); | |
| 2885 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); | |
| 2886 ASSERT(bpl->bpl_queue == NULL); | |
| 2887 | |
| 1544 | 2888 spa_config_exit(spa, FTAG); |
| 2889 | |
| 2890 /* | |
| 2891 * If any async tasks have been requested, kick them off. | |
| 2892 */ | |
| 2893 spa_async_dispatch(spa); | |
| 789 | 2894 } |
| 2895 | |
| 2896 /* | |
| 2897 * Sync all pools. We don't want to hold the namespace lock across these | |
| 2898 * operations, so we take a reference on the spa_t and drop the lock during the | |
| 2899 * sync. | |
| 2900 */ | |
| 2901 void | |
| 2902 spa_sync_allpools(void) | |
| 2903 { | |
| 2904 spa_t *spa = NULL; | |
| 2905 mutex_enter(&spa_namespace_lock); | |
| 2906 while ((spa = spa_next(spa)) != NULL) { | |
| 2907 if (spa_state(spa) != POOL_STATE_ACTIVE) | |
| 2908 continue; | |
| 2909 spa_open_ref(spa, FTAG); | |
| 2910 mutex_exit(&spa_namespace_lock); | |
| 2911 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 2912 mutex_enter(&spa_namespace_lock); | |
| 2913 spa_close(spa, FTAG); | |
| 2914 } | |
| 2915 mutex_exit(&spa_namespace_lock); | |
| 2916 } | |
| 2917 | |
| 2918 /* | |
| 2919 * ========================================================================== | |
| 2920 * Miscellaneous routines | |
| 2921 * ========================================================================== | |
| 2922 */ | |
| 2923 | |
| 2924 /* | |
| 2925 * Remove all pools in the system. | |
| 2926 */ | |
| 2927 void | |
| 2928 spa_evict_all(void) | |
| 2929 { | |
| 2930 spa_t *spa; | |
| 2931 | |
| 2932 /* | |
| 2933 * Remove all cached state. All pools should be closed now, | |
| 2934 * so every spa in the AVL tree should be unreferenced. | |
| 2935 */ | |
| 2936 mutex_enter(&spa_namespace_lock); | |
| 2937 while ((spa = spa_next(NULL)) != NULL) { | |
| 2938 /* | |
| 1544 | 2939 * Stop async tasks. The async thread may need to detach |
| 2940 * a device that's been replaced, which requires grabbing | |
| 2941 * spa_namespace_lock, so we must drop it here. | |
| 789 | 2942 */ |
| 2943 spa_open_ref(spa, FTAG); | |
| 2944 mutex_exit(&spa_namespace_lock); | |
| 1544 | 2945 spa_async_suspend(spa); |
| 789 | 2946 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); |
| 2947 mutex_enter(&spa_namespace_lock); | |
| 2948 spa_close(spa, FTAG); | |
| 2949 | |
| 2950 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 2951 spa_unload(spa); | |
| 2952 spa_deactivate(spa); | |
| 2953 } | |
| 2954 spa_remove(spa); | |
| 2955 } | |
| 2956 mutex_exit(&spa_namespace_lock); | |
| 2957 } | |
| 1544 | 2958 |
| 2959 vdev_t * | |
| 2960 spa_lookup_by_guid(spa_t *spa, uint64_t guid) | |
| 2961 { | |
| 2962 return (vdev_lookup_by_guid(spa->spa_root_vdev, guid)); | |
| 2963 } | |
| 1760 | 2964 |
| 2965 void | |
| 2966 spa_upgrade(spa_t *spa) | |
| 2967 { | |
| 2968 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2969 | |
| 2970 /* | |
| 2971 * This should only be called for a non-faulted pool, and since a | |
| 2972 * future version would result in an unopenable pool, this shouldn't be | |
| 2973 * possible. | |
| 2974 */ | |
| 2975 ASSERT(spa->spa_uberblock.ub_version <= ZFS_VERSION); | |
| 2976 | |
| 2977 spa->spa_uberblock.ub_version = ZFS_VERSION; | |
| 2978 vdev_config_dirty(spa->spa_root_vdev); | |
| 2979 | |
| 2980 spa_config_exit(spa, FTAG); | |
| 2082 | 2981 |
| 2982 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 1760 | 2983 } |
| 2082 | 2984 |
| 2985 boolean_t | |
| 2986 spa_has_spare(spa_t *spa, uint64_t guid) | |
| 2987 { | |
| 2988 int i; | |
| 2989 | |
| 2990 for (i = 0; i < spa->spa_nspares; i++) | |
| 2991 if (spa->spa_spares[i]->vdev_guid == guid) | |
| 2992 return (B_TRUE); | |
| 2993 | |
| 2994 return (B_FALSE); | |
| 2995 } |