Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/spa.c @ 1775:e51e26b432c0
6410698 ZFS metadata needs to be more highly replicated (ditto blocks)
6410700 zdb should support reading raw blocks out of storage pool
6410709 ztest: spa config can change before pool export
| author | billm |
|---|---|
| date | Mon, 10 Apr 2006 05:03:38 -0700 |
| parents | e1ad2821c30d |
| children | 35c8b566d7af |
| 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 */ | |
| 21 /* | |
|
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22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. |
| 789 | 23 * Use is subject to license terms. |
| 24 */ | |
| 25 | |
| 26 #pragma ident "%Z%%M% %I% %E% SMI" | |
| 27 | |
| 28 /* | |
| 29 * This file contains all the routines used when modifying on-disk SPA state. | |
| 30 * This includes opening, importing, destroying, exporting a pool, and syncing a | |
| 31 * pool. | |
| 32 */ | |
| 33 | |
| 34 #include <sys/zfs_context.h> | |
| 1544 | 35 #include <sys/fm/fs/zfs.h> |
| 789 | 36 #include <sys/spa_impl.h> |
| 37 #include <sys/zio.h> | |
| 38 #include <sys/zio_checksum.h> | |
| 39 #include <sys/zio_compress.h> | |
| 40 #include <sys/dmu.h> | |
| 41 #include <sys/dmu_tx.h> | |
| 42 #include <sys/zap.h> | |
| 43 #include <sys/zil.h> | |
| 44 #include <sys/vdev_impl.h> | |
| 45 #include <sys/metaslab.h> | |
| 46 #include <sys/uberblock_impl.h> | |
| 47 #include <sys/txg.h> | |
| 48 #include <sys/avl.h> | |
| 49 #include <sys/dmu_traverse.h> | |
| 50 #include <sys/unique.h> | |
| 51 #include <sys/dsl_pool.h> | |
| 52 #include <sys/dsl_dir.h> | |
| 53 #include <sys/dsl_prop.h> | |
| 54 #include <sys/fs/zfs.h> | |
| 55 #include <sys/callb.h> | |
| 56 | |
| 57 /* | |
| 58 * ========================================================================== | |
| 59 * SPA state manipulation (open/create/destroy/import/export) | |
| 60 * ========================================================================== | |
| 61 */ | |
| 62 | |
| 1544 | 63 static int |
| 64 spa_error_entry_compare(const void *a, const void *b) | |
| 65 { | |
| 66 spa_error_entry_t *sa = (spa_error_entry_t *)a; | |
| 67 spa_error_entry_t *sb = (spa_error_entry_t *)b; | |
| 68 int ret; | |
| 69 | |
| 70 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, | |
| 71 sizeof (zbookmark_t)); | |
| 72 | |
| 73 if (ret < 0) | |
| 74 return (-1); | |
| 75 else if (ret > 0) | |
| 76 return (1); | |
| 77 else | |
| 78 return (0); | |
| 79 } | |
| 80 | |
| 81 /* | |
| 82 * Utility function which retrieves copies of the current logs and | |
| 83 * re-initializes them in the process. | |
| 84 */ | |
| 85 void | |
| 86 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) | |
| 87 { | |
| 88 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); | |
| 89 | |
| 90 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); | |
| 91 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); | |
| 92 | |
| 93 avl_create(&spa->spa_errlist_scrub, | |
| 94 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 95 offsetof(spa_error_entry_t, se_avl)); | |
| 96 avl_create(&spa->spa_errlist_last, | |
| 97 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 98 offsetof(spa_error_entry_t, se_avl)); | |
| 99 } | |
| 100 | |
| 789 | 101 /* |
| 102 * Activate an uninitialized pool. | |
| 103 */ | |
| 104 static void | |
| 105 spa_activate(spa_t *spa) | |
| 106 { | |
| 107 int t; | |
| 108 | |
| 109 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); | |
| 110 | |
| 111 spa->spa_state = POOL_STATE_ACTIVE; | |
| 112 | |
| 113 spa->spa_normal_class = metaslab_class_create(); | |
| 114 | |
| 115 for (t = 0; t < ZIO_TYPES; t++) { | |
| 116 spa->spa_zio_issue_taskq[t] = taskq_create("spa_zio_issue", | |
| 117 8, maxclsyspri, 50, INT_MAX, | |
| 118 TASKQ_PREPOPULATE); | |
| 119 spa->spa_zio_intr_taskq[t] = taskq_create("spa_zio_intr", | |
| 120 8, maxclsyspri, 50, INT_MAX, | |
| 121 TASKQ_PREPOPULATE); | |
| 122 } | |
| 123 | |
| 124 rw_init(&spa->spa_traverse_lock, NULL, RW_DEFAULT, NULL); | |
| 125 | |
| 126 list_create(&spa->spa_dirty_list, sizeof (vdev_t), | |
| 127 offsetof(vdev_t, vdev_dirty_node)); | |
| 128 | |
| 129 txg_list_create(&spa->spa_vdev_txg_list, | |
| 130 offsetof(struct vdev, vdev_txg_node)); | |
| 1544 | 131 |
| 132 avl_create(&spa->spa_errlist_scrub, | |
| 133 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 134 offsetof(spa_error_entry_t, se_avl)); | |
| 135 avl_create(&spa->spa_errlist_last, | |
| 136 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 137 offsetof(spa_error_entry_t, se_avl)); | |
| 789 | 138 } |
| 139 | |
| 140 /* | |
| 141 * Opposite of spa_activate(). | |
| 142 */ | |
| 143 static void | |
| 144 spa_deactivate(spa_t *spa) | |
| 145 { | |
| 146 int t; | |
| 147 | |
| 148 ASSERT(spa->spa_sync_on == B_FALSE); | |
| 149 ASSERT(spa->spa_dsl_pool == NULL); | |
| 150 ASSERT(spa->spa_root_vdev == NULL); | |
| 151 | |
| 152 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); | |
| 153 | |
| 154 txg_list_destroy(&spa->spa_vdev_txg_list); | |
| 155 | |
| 156 list_destroy(&spa->spa_dirty_list); | |
| 157 | |
| 158 rw_destroy(&spa->spa_traverse_lock); | |
| 159 | |
| 160 for (t = 0; t < ZIO_TYPES; t++) { | |
| 161 taskq_destroy(spa->spa_zio_issue_taskq[t]); | |
| 162 taskq_destroy(spa->spa_zio_intr_taskq[t]); | |
| 163 spa->spa_zio_issue_taskq[t] = NULL; | |
| 164 spa->spa_zio_intr_taskq[t] = NULL; | |
| 165 } | |
| 166 | |
| 167 metaslab_class_destroy(spa->spa_normal_class); | |
| 168 spa->spa_normal_class = NULL; | |
| 169 | |
| 1544 | 170 /* |
| 171 * If this was part of an import or the open otherwise failed, we may | |
| 172 * still have errors left in the queues. Empty them just in case. | |
| 173 */ | |
| 174 spa_errlog_drain(spa); | |
| 175 | |
| 176 avl_destroy(&spa->spa_errlist_scrub); | |
| 177 avl_destroy(&spa->spa_errlist_last); | |
| 178 | |
| 789 | 179 spa->spa_state = POOL_STATE_UNINITIALIZED; |
| 180 } | |
| 181 | |
| 182 /* | |
| 183 * Verify a pool configuration, and construct the vdev tree appropriately. This | |
| 184 * will create all the necessary vdevs in the appropriate layout, with each vdev | |
| 185 * in the CLOSED state. This will prep the pool before open/creation/import. | |
| 186 * All vdev validation is done by the vdev_alloc() routine. | |
| 187 */ | |
| 188 static vdev_t * | |
| 189 spa_config_parse(spa_t *spa, nvlist_t *nv, vdev_t *parent, uint_t id, int atype) | |
| 190 { | |
| 191 nvlist_t **child; | |
| 192 uint_t c, children; | |
| 193 vdev_t *vd; | |
| 194 | |
| 195 if ((vd = vdev_alloc(spa, nv, parent, id, atype)) == NULL) | |
| 196 return (NULL); | |
| 197 | |
| 198 if (vd->vdev_ops->vdev_op_leaf) | |
| 199 return (vd); | |
| 200 | |
| 201 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
| 202 &child, &children) != 0) { | |
| 203 vdev_free(vd); | |
| 204 return (NULL); | |
| 205 } | |
| 206 | |
| 207 for (c = 0; c < children; c++) { | |
| 208 if (spa_config_parse(spa, child[c], vd, c, atype) == NULL) { | |
| 209 vdev_free(vd); | |
| 210 return (NULL); | |
| 211 } | |
| 212 } | |
| 213 | |
| 214 return (vd); | |
| 215 } | |
| 216 | |
| 217 /* | |
| 218 * Opposite of spa_load(). | |
| 219 */ | |
| 220 static void | |
| 221 spa_unload(spa_t *spa) | |
| 222 { | |
| 223 /* | |
| 1544 | 224 * Stop async tasks. |
| 225 */ | |
| 226 spa_async_suspend(spa); | |
| 227 | |
| 228 /* | |
| 789 | 229 * Stop syncing. |
| 230 */ | |
| 231 if (spa->spa_sync_on) { | |
| 232 txg_sync_stop(spa->spa_dsl_pool); | |
| 233 spa->spa_sync_on = B_FALSE; | |
| 234 } | |
| 235 | |
| 236 /* | |
| 237 * Wait for any outstanding prefetch I/O to complete. | |
| 238 */ | |
| 1544 | 239 spa_config_enter(spa, RW_WRITER, FTAG); |
| 240 spa_config_exit(spa, FTAG); | |
| 789 | 241 |
| 242 /* | |
| 243 * Close the dsl pool. | |
| 244 */ | |
| 245 if (spa->spa_dsl_pool) { | |
| 246 dsl_pool_close(spa->spa_dsl_pool); | |
| 247 spa->spa_dsl_pool = NULL; | |
| 248 } | |
| 249 | |
| 250 /* | |
| 251 * Close all vdevs. | |
| 252 */ | |
|
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253 if (spa->spa_root_vdev) |
| 789 | 254 vdev_free(spa->spa_root_vdev); |
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255 ASSERT(spa->spa_root_vdev == NULL); |
| 1544 | 256 |
| 257 spa->spa_async_suspended = 0; | |
| 789 | 258 } |
| 259 | |
| 260 /* | |
| 261 * Load an existing storage pool, using the pool's builtin spa_config as a | |
| 1544 | 262 * source of configuration information. |
| 789 | 263 */ |
| 264 static int | |
| 1544 | 265 spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) |
| 789 | 266 { |
| 267 int error = 0; | |
| 268 nvlist_t *nvroot = NULL; | |
| 269 vdev_t *rvd; | |
| 270 uberblock_t *ub = &spa->spa_uberblock; | |
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271 uint64_t config_cache_txg = spa->spa_config_txg; |
| 789 | 272 uint64_t pool_guid; |
| 273 zio_t *zio; | |
| 274 | |
| 1544 | 275 spa->spa_load_state = state; |
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276 |
| 789 | 277 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || |
| 1733 | 278 nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) { |
| 1544 | 279 error = EINVAL; |
| 280 goto out; | |
| 281 } | |
| 789 | 282 |
| 1733 | 283 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, |
| 284 &spa->spa_config_txg); | |
| 285 | |
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286 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && |
| 1544 | 287 spa_guid_exists(pool_guid, 0)) { |
| 288 error = EEXIST; | |
| 289 goto out; | |
| 290 } | |
| 789 | 291 |
| 292 /* | |
| 293 * Parse the configuration into a vdev tree. | |
| 294 */ | |
| 1544 | 295 spa_config_enter(spa, RW_WRITER, FTAG); |
| 789 | 296 rvd = spa_config_parse(spa, nvroot, NULL, 0, VDEV_ALLOC_LOAD); |
| 1544 | 297 spa_config_exit(spa, FTAG); |
| 789 | 298 |
| 1544 | 299 if (rvd == NULL) { |
| 300 error = EINVAL; | |
| 301 goto out; | |
| 302 } | |
| 789 | 303 |
|
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304 ASSERT(spa->spa_root_vdev == rvd); |
| 789 | 305 ASSERT(spa_guid(spa) == pool_guid); |
| 306 | |
| 307 /* | |
| 308 * Try to open all vdevs, loading each label in the process. | |
| 309 */ | |
| 1544 | 310 if (vdev_open(rvd) != 0) { |
| 311 error = ENXIO; | |
| 312 goto out; | |
| 313 } | |
| 789 | 314 |
| 315 /* | |
| 316 * Find the best uberblock. | |
| 317 */ | |
| 318 bzero(ub, sizeof (uberblock_t)); | |
| 319 | |
| 320 zio = zio_root(spa, NULL, NULL, | |
| 321 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); | |
| 322 vdev_uberblock_load(zio, rvd, ub); | |
| 323 error = zio_wait(zio); | |
| 324 | |
| 325 /* | |
| 326 * If we weren't able to find a single valid uberblock, return failure. | |
| 327 */ | |
| 328 if (ub->ub_txg == 0) { | |
| 1760 | 329 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 330 VDEV_AUX_CORRUPT_DATA); | |
| 1544 | 331 error = ENXIO; |
| 332 goto out; | |
| 333 } | |
| 334 | |
| 335 /* | |
| 336 * If the pool is newer than the code, we can't open it. | |
| 337 */ | |
| 1760 | 338 if (ub->ub_version > ZFS_VERSION) { |
| 339 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 340 VDEV_AUX_VERSION_NEWER); | |
| 1544 | 341 error = ENOTSUP; |
| 342 goto out; | |
| 789 | 343 } |
| 344 | |
| 345 /* | |
| 346 * If the vdev guid sum doesn't match the uberblock, we have an | |
| 347 * incomplete configuration. | |
| 348 */ | |
| 1732 | 349 if (rvd->vdev_guid_sum != ub->ub_guid_sum && mosconfig) { |
| 1544 | 350 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 351 VDEV_AUX_BAD_GUID_SUM); | |
| 352 error = ENXIO; | |
| 353 goto out; | |
| 789 | 354 } |
| 355 | |
| 356 /* | |
| 357 * Initialize internal SPA structures. | |
| 358 */ | |
| 359 spa->spa_state = POOL_STATE_ACTIVE; | |
| 360 spa->spa_ubsync = spa->spa_uberblock; | |
| 361 spa->spa_first_txg = spa_last_synced_txg(spa) + 1; | |
| 1544 | 362 error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool); |
| 363 if (error) { | |
| 364 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 365 VDEV_AUX_CORRUPT_DATA); | |
| 366 goto out; | |
| 367 } | |
| 789 | 368 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; |
| 369 | |
| 1544 | 370 if (zap_lookup(spa->spa_meta_objset, |
| 789 | 371 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 372 sizeof (uint64_t), 1, &spa->spa_config_object) != 0) { |
| 373 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 374 VDEV_AUX_CORRUPT_DATA); | |
| 375 error = EIO; | |
| 376 goto out; | |
| 377 } | |
| 789 | 378 |
| 379 if (!mosconfig) { | |
| 380 dmu_buf_t *db; | |
| 381 char *packed = NULL; | |
| 382 size_t nvsize = 0; | |
| 383 nvlist_t *newconfig = NULL; | |
| 384 | |
| 1544 | 385 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, |
| 386 spa->spa_config_object, FTAG, &db)); | |
| 789 | 387 nvsize = *(uint64_t *)db->db_data; |
| 1544 | 388 dmu_buf_rele(db, FTAG); |
| 789 | 389 |
| 390 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 1544 | 391 error = dmu_read(spa->spa_meta_objset, |
| 789 | 392 spa->spa_config_object, 0, nvsize, packed); |
| 393 if (error == 0) | |
| 394 error = nvlist_unpack(packed, nvsize, &newconfig, 0); | |
| 395 kmem_free(packed, nvsize); | |
| 396 | |
| 1544 | 397 if (error) { |
| 398 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 399 VDEV_AUX_CORRUPT_DATA); | |
| 400 error = EIO; | |
| 401 goto out; | |
| 402 } | |
| 789 | 403 |
| 404 spa_config_set(spa, newconfig); | |
| 405 | |
| 406 spa_unload(spa); | |
| 407 spa_deactivate(spa); | |
| 408 spa_activate(spa); | |
| 409 | |
| 1544 | 410 return (spa_load(spa, newconfig, state, B_TRUE)); |
| 411 } | |
| 412 | |
| 413 if (zap_lookup(spa->spa_meta_objset, | |
| 414 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, | |
| 415 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj) != 0) { | |
| 416 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 417 VDEV_AUX_CORRUPT_DATA); | |
| 418 error = EIO; | |
| 419 goto out; | |
| 789 | 420 } |
| 421 | |
| 1544 | 422 /* |
| 423 * Load the persistent error log. If we have an older pool, this will | |
| 424 * not be present. | |
| 425 */ | |
| 426 error = zap_lookup(spa->spa_meta_objset, | |
| 427 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_LAST, | |
| 428 sizeof (uint64_t), 1, &spa->spa_errlog_last); | |
| 429 if (error != 0 &&error != ENOENT) { | |
| 430 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 431 VDEV_AUX_CORRUPT_DATA); | |
| 432 error = EIO; | |
| 433 goto out; | |
| 434 } | |
| 435 | |
| 436 error = zap_lookup(spa->spa_meta_objset, | |
| 437 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_SCRUB, | |
| 438 sizeof (uint64_t), 1, &spa->spa_errlog_scrub); | |
| 439 if (error != 0 && error != ENOENT) { | |
| 440 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 441 VDEV_AUX_CORRUPT_DATA); | |
| 442 error = EIO; | |
| 443 goto out; | |
| 444 } | |
| 789 | 445 |
| 446 /* | |
| 1544 | 447 * Load the vdev state for all top level vdevs. We need to grab the |
| 448 * config lock because all label I/O is done with the | |
| 449 * ZIO_FLAG_CONFIG_HELD flag. | |
| 789 | 450 */ |
| 1544 | 451 spa_config_enter(spa, RW_READER, FTAG); |
|
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452 error = vdev_load(rvd); |
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453 spa_config_exit(spa, FTAG); |
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454 |
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455 if (error) |
| 1544 | 456 goto out; |
| 789 | 457 |
| 458 /* | |
| 459 * Propagate the leaf DTLs we just loaded all the way up the tree. | |
| 460 */ | |
| 1544 | 461 spa_config_enter(spa, RW_WRITER, FTAG); |
| 789 | 462 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); |
| 1544 | 463 spa_config_exit(spa, FTAG); |
| 789 | 464 |
| 465 /* | |
| 466 * Check the state of the root vdev. If it can't be opened, it | |
| 467 * indicates one or more toplevel vdevs are faulted. | |
| 468 */ | |
| 1544 | 469 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
| 470 error = ENXIO; | |
| 471 goto out; | |
| 472 } | |
| 789 | 473 |
| 1544 | 474 if ((spa_mode & FWRITE) && state != SPA_LOAD_TRYIMPORT) { |
|
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475 dmu_tx_t *tx; |
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476 int need_update = B_FALSE; |
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477 int c; |
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478 |
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479 /* |
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480 * Claim log blocks that haven't been committed yet. |
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481 * This must all happen in a single txg. |
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482 */ |
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483 tx = dmu_tx_create_assigned(spa_get_dsl(spa), |
| 789 | 484 spa_first_txg(spa)); |
| 485 dmu_objset_find(spa->spa_name, zil_claim, tx, 0); | |
| 486 dmu_tx_commit(tx); | |
| 487 | |
| 488 spa->spa_sync_on = B_TRUE; | |
| 489 txg_sync_start(spa->spa_dsl_pool); | |
| 490 | |
| 491 /* | |
| 492 * Wait for all claims to sync. | |
| 493 */ | |
| 494 txg_wait_synced(spa->spa_dsl_pool, 0); | |
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495 |
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496 /* |
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497 * If the config cache is stale, or we have uninitialized |
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498 * metaslabs (see spa_vdev_add()), then update the config. |
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499 */ |
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500 if (config_cache_txg != spa->spa_config_txg || |
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501 state == SPA_LOAD_IMPORT) |
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502 need_update = B_TRUE; |
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503 |
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504 for (c = 0; c < rvd->vdev_children; c++) |
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505 if (rvd->vdev_child[c]->vdev_ms_array == 0) |
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506 need_update = B_TRUE; |
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507 |
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508 /* |
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509 * Update the config cache asychronously in case we're the |
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510 * root pool, in which case the config cache isn't writable yet. |
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511 */ |
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512 if (need_update) |
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513 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); |
| 789 | 514 } |
| 515 | |
| 1544 | 516 error = 0; |
| 517 out: | |
| 518 if (error) | |
| 519 zfs_ereport_post(FM_EREPORT_ZFS_POOL, spa, NULL, NULL, 0, 0); | |
| 520 spa->spa_load_state = SPA_LOAD_NONE; | |
| 521 spa->spa_ena = 0; | |
| 522 | |
| 523 return (error); | |
| 789 | 524 } |
| 525 | |
| 526 /* | |
| 527 * Pool Open/Import | |
| 528 * | |
| 529 * The import case is identical to an open except that the configuration is sent | |
| 530 * down from userland, instead of grabbed from the configuration cache. For the | |
| 531 * case of an open, the pool configuration will exist in the | |
| 532 * POOL_STATE_UNITIALIZED state. | |
| 533 * | |
| 534 * The stats information (gen/count/ustats) is used to gather vdev statistics at | |
| 535 * the same time open the pool, without having to keep around the spa_t in some | |
| 536 * ambiguous state. | |
| 537 */ | |
| 538 static int | |
| 539 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) | |
| 540 { | |
| 541 spa_t *spa; | |
| 542 int error; | |
| 543 int loaded = B_FALSE; | |
| 544 int locked = B_FALSE; | |
| 545 | |
| 546 *spapp = NULL; | |
| 547 | |
| 548 /* | |
| 549 * As disgusting as this is, we need to support recursive calls to this | |
| 550 * function because dsl_dir_open() is called during spa_load(), and ends | |
| 551 * up calling spa_open() again. The real fix is to figure out how to | |
| 552 * avoid dsl_dir_open() calling this in the first place. | |
| 553 */ | |
| 554 if (mutex_owner(&spa_namespace_lock) != curthread) { | |
| 555 mutex_enter(&spa_namespace_lock); | |
| 556 locked = B_TRUE; | |
| 557 } | |
| 558 | |
| 559 if ((spa = spa_lookup(pool)) == NULL) { | |
| 560 if (locked) | |
| 561 mutex_exit(&spa_namespace_lock); | |
| 562 return (ENOENT); | |
| 563 } | |
| 564 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { | |
| 565 | |
| 566 spa_activate(spa); | |
| 567 | |
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568 error = spa_load(spa, spa->spa_config, SPA_LOAD_OPEN, B_FALSE); |
| 789 | 569 |
| 570 if (error == EBADF) { | |
| 571 /* | |
| 572 * If vdev_load() returns EBADF, it indicates that one | |
| 573 * of the vdevs indicates that the pool has been | |
| 574 * exported or destroyed. If this is the case, the | |
| 575 * config cache is out of sync and we should remove the | |
| 576 * pool from the namespace. | |
| 577 */ | |
| 578 spa_unload(spa); | |
| 579 spa_deactivate(spa); | |
| 580 spa_remove(spa); | |
| 581 spa_config_sync(); | |
| 582 if (locked) | |
| 583 mutex_exit(&spa_namespace_lock); | |
| 584 return (ENOENT); | |
| 1544 | 585 } |
| 586 | |
| 587 if (error) { | |
| 789 | 588 /* |
| 589 * We can't open the pool, but we still have useful | |
| 590 * information: the state of each vdev after the | |
| 591 * attempted vdev_open(). Return this to the user. | |
| 592 */ | |
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593 if (config != NULL && spa->spa_root_vdev != NULL) { |
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594 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 595 *config = spa_config_generate(spa, NULL, -1ULL, |
| 596 B_TRUE); | |
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597 spa_config_exit(spa, FTAG); |
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598 } |
| 789 | 599 spa_unload(spa); |
| 600 spa_deactivate(spa); | |
| 1544 | 601 spa->spa_last_open_failed = B_TRUE; |
| 789 | 602 if (locked) |
| 603 mutex_exit(&spa_namespace_lock); | |
| 604 *spapp = NULL; | |
| 605 return (error); | |
| 1544 | 606 } else { |
| 607 zfs_post_ok(spa, NULL); | |
| 608 spa->spa_last_open_failed = B_FALSE; | |
| 789 | 609 } |
| 610 | |
| 611 loaded = B_TRUE; | |
| 612 } | |
| 613 | |
| 614 spa_open_ref(spa, tag); | |
| 615 if (locked) | |
| 616 mutex_exit(&spa_namespace_lock); | |
| 617 | |
| 618 *spapp = spa; | |
| 619 | |
| 620 if (config != NULL) { | |
| 1544 | 621 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 622 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
| 1544 | 623 spa_config_exit(spa, FTAG); |
| 789 | 624 } |
| 625 | |
| 626 /* | |
| 627 * If we just loaded the pool, resilver anything that's out of date. | |
| 628 */ | |
| 629 if (loaded && (spa_mode & FWRITE)) | |
| 630 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 631 | |
| 632 return (0); | |
| 633 } | |
| 634 | |
| 635 int | |
| 636 spa_open(const char *name, spa_t **spapp, void *tag) | |
| 637 { | |
| 638 return (spa_open_common(name, spapp, tag, NULL)); | |
| 639 } | |
| 640 | |
| 1544 | 641 /* |
| 642 * Lookup the given spa_t, incrementing the inject count in the process, | |
| 643 * preventing it from being exported or destroyed. | |
| 644 */ | |
| 645 spa_t * | |
| 646 spa_inject_addref(char *name) | |
| 647 { | |
| 648 spa_t *spa; | |
| 649 | |
| 650 mutex_enter(&spa_namespace_lock); | |
| 651 if ((spa = spa_lookup(name)) == NULL) { | |
| 652 mutex_exit(&spa_namespace_lock); | |
| 653 return (NULL); | |
| 654 } | |
| 655 spa->spa_inject_ref++; | |
| 656 mutex_exit(&spa_namespace_lock); | |
| 657 | |
| 658 return (spa); | |
| 659 } | |
| 660 | |
| 661 void | |
| 662 spa_inject_delref(spa_t *spa) | |
| 663 { | |
| 664 mutex_enter(&spa_namespace_lock); | |
| 665 spa->spa_inject_ref--; | |
| 666 mutex_exit(&spa_namespace_lock); | |
| 667 } | |
| 668 | |
| 789 | 669 int |
| 1544 | 670 spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) |
| 789 | 671 { |
| 672 int error; | |
| 673 spa_t *spa; | |
| 674 | |
| 675 *config = NULL; | |
| 676 error = spa_open_common(name, &spa, FTAG, config); | |
| 677 | |
| 1544 | 678 if (spa && *config != NULL) |
| 679 VERIFY(nvlist_add_uint64(*config, ZPOOL_CONFIG_ERRCOUNT, | |
| 680 spa_get_errlog_size(spa)) == 0); | |
| 681 | |
| 682 /* | |
| 683 * We want to get the alternate root even for faulted pools, so we cheat | |
| 684 * and call spa_lookup() directly. | |
| 685 */ | |
| 686 if (altroot) { | |
| 687 if (spa == NULL) { | |
| 688 mutex_enter(&spa_namespace_lock); | |
| 689 spa = spa_lookup(name); | |
| 690 if (spa) | |
| 691 spa_altroot(spa, altroot, buflen); | |
| 692 else | |
| 693 altroot[0] = '\0'; | |
| 694 spa = NULL; | |
| 695 mutex_exit(&spa_namespace_lock); | |
| 696 } else { | |
| 697 spa_altroot(spa, altroot, buflen); | |
| 698 } | |
| 699 } | |
| 700 | |
| 789 | 701 if (spa != NULL) |
| 702 spa_close(spa, FTAG); | |
| 703 | |
| 704 return (error); | |
| 705 } | |
| 706 | |
| 707 /* | |
| 708 * Pool Creation | |
| 709 */ | |
| 710 int | |
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711 spa_create(const char *pool, nvlist_t *nvroot, const char *altroot) |
| 789 | 712 { |
| 713 spa_t *spa; | |
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714 vdev_t *rvd; |
| 789 | 715 dsl_pool_t *dp; |
| 716 dmu_tx_t *tx; | |
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717 int c, error; |
| 789 | 718 uint64_t txg = TXG_INITIAL; |
| 719 | |
| 720 /* | |
| 721 * If this pool already exists, return failure. | |
| 722 */ | |
| 723 mutex_enter(&spa_namespace_lock); | |
| 724 if (spa_lookup(pool) != NULL) { | |
| 725 mutex_exit(&spa_namespace_lock); | |
| 726 return (EEXIST); | |
| 727 } | |
| 728 | |
| 729 /* | |
| 730 * Allocate a new spa_t structure. | |
| 731 */ | |
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732 spa = spa_add(pool, altroot); |
| 789 | 733 spa_activate(spa); |
| 734 | |
| 735 spa->spa_uberblock.ub_txg = txg - 1; | |
| 1760 | 736 spa->spa_uberblock.ub_version = ZFS_VERSION; |
| 789 | 737 spa->spa_ubsync = spa->spa_uberblock; |
| 738 | |
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739 /* |
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740 * Create the root vdev. |
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741 */ |
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742 spa_config_enter(spa, RW_WRITER, FTAG); |
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743 |
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744 rvd = spa_config_parse(spa, nvroot, NULL, 0, VDEV_ALLOC_ADD); |
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745 |
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746 ASSERT(spa->spa_root_vdev == rvd); |
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747 |
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748 if (rvd == NULL) { |
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749 error = EINVAL; |
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750 } else { |
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751 if ((error = vdev_create(rvd, txg)) == 0) { |
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752 for (c = 0; c < rvd->vdev_children; c++) |
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753 vdev_init(rvd->vdev_child[c], txg); |
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754 vdev_config_dirty(rvd); |
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755 } |
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756 } |
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757 |
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758 spa_config_exit(spa, FTAG); |
| 789 | 759 |
| 760 if (error) { | |
| 761 spa_unload(spa); | |
| 762 spa_deactivate(spa); | |
| 763 spa_remove(spa); | |
| 764 mutex_exit(&spa_namespace_lock); | |
| 765 return (error); | |
| 766 } | |
| 767 | |
| 768 spa->spa_dsl_pool = dp = dsl_pool_create(spa, txg); | |
| 769 spa->spa_meta_objset = dp->dp_meta_objset; | |
| 770 | |
| 771 tx = dmu_tx_create_assigned(dp, txg); | |
| 772 | |
| 773 /* | |
| 774 * Create the pool config object. | |
| 775 */ | |
| 776 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 777 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 778 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 779 | |
| 1544 | 780 if (zap_add(spa->spa_meta_objset, |
| 789 | 781 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 782 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { |
| 783 cmn_err(CE_PANIC, "failed to add pool config"); | |
| 784 } | |
| 789 | 785 |
| 786 /* | |
| 787 * Create the deferred-free bplist object. Turn off compression | |
| 788 * because sync-to-convergence takes longer if the blocksize | |
| 789 * keeps changing. | |
| 790 */ | |
| 791 spa->spa_sync_bplist_obj = bplist_create(spa->spa_meta_objset, | |
| 792 1 << 14, tx); | |
| 793 dmu_object_set_compress(spa->spa_meta_objset, spa->spa_sync_bplist_obj, | |
| 794 ZIO_COMPRESS_OFF, tx); | |
| 795 | |
| 1544 | 796 if (zap_add(spa->spa_meta_objset, |
| 789 | 797 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, |
| 1544 | 798 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj, tx) != 0) { |
| 799 cmn_err(CE_PANIC, "failed to add bplist"); | |
| 800 } | |
| 789 | 801 |
| 802 dmu_tx_commit(tx); | |
| 803 | |
| 804 spa->spa_sync_on = B_TRUE; | |
| 805 txg_sync_start(spa->spa_dsl_pool); | |
| 806 | |
| 807 /* | |
| 808 * We explicitly wait for the first transaction to complete so that our | |
| 809 * bean counters are appropriately updated. | |
| 810 */ | |
| 811 txg_wait_synced(spa->spa_dsl_pool, txg); | |
| 812 | |
| 813 spa_config_sync(); | |
| 814 | |
| 815 mutex_exit(&spa_namespace_lock); | |
| 816 | |
| 817 return (0); | |
| 818 } | |
| 819 | |
| 820 /* | |
| 821 * Import the given pool into the system. We set up the necessary spa_t and | |
| 822 * then call spa_load() to do the dirty work. | |
| 823 */ | |
| 824 int | |
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825 spa_import(const char *pool, nvlist_t *config, const char *altroot) |
| 789 | 826 { |
| 827 spa_t *spa; | |
| 828 int error; | |
| 829 | |
| 830 if (!(spa_mode & FWRITE)) | |
| 831 return (EROFS); | |
| 832 | |
| 833 /* | |
| 834 * If a pool with this name exists, return failure. | |
| 835 */ | |
| 836 mutex_enter(&spa_namespace_lock); | |
| 837 if (spa_lookup(pool) != NULL) { | |
| 838 mutex_exit(&spa_namespace_lock); | |
| 839 return (EEXIST); | |
| 840 } | |
| 841 | |
| 842 /* | |
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843 * Create and initialize the spa structure. |
| 789 | 844 */ |
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845 spa = spa_add(pool, altroot); |
| 789 | 846 spa_activate(spa); |
| 847 | |
| 848 /* | |
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849 * Pass off the heavy lifting to spa_load(). |
| 1732 | 850 * Pass TRUE for mosconfig because the user-supplied config |
| 851 * is actually the one to trust when doing an import. | |
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852 */ |
| 1732 | 853 error = spa_load(spa, config, SPA_LOAD_IMPORT, B_TRUE); |
| 789 | 854 |
| 855 if (error) { | |
| 856 spa_unload(spa); | |
| 857 spa_deactivate(spa); | |
| 858 spa_remove(spa); | |
| 859 mutex_exit(&spa_namespace_lock); | |
| 860 return (error); | |
| 861 } | |
| 862 | |
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863 /* |
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864 * Update the config cache to include the newly-imported pool. |
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865 */ |
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866 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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867 |
| 789 | 868 mutex_exit(&spa_namespace_lock); |
| 869 | |
| 870 /* | |
| 871 * Resilver anything that's out of date. | |
| 872 */ | |
| 873 if (spa_mode & FWRITE) | |
| 874 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 875 | |
| 876 return (0); | |
| 877 } | |
| 878 | |
| 879 /* | |
| 880 * This (illegal) pool name is used when temporarily importing a spa_t in order | |
| 881 * to get the vdev stats associated with the imported devices. | |
| 882 */ | |
| 883 #define TRYIMPORT_NAME "$import" | |
| 884 | |
| 885 nvlist_t * | |
| 886 spa_tryimport(nvlist_t *tryconfig) | |
| 887 { | |
| 888 nvlist_t *config = NULL; | |
| 889 char *poolname; | |
| 890 spa_t *spa; | |
| 891 uint64_t state; | |
| 892 | |
| 893 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) | |
| 894 return (NULL); | |
| 895 | |
| 896 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) | |
| 897 return (NULL); | |
| 898 | |
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899 /* |
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900 * Create and initialize the spa structure. |
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901 */ |
| 789 | 902 mutex_enter(&spa_namespace_lock); |
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903 spa = spa_add(TRYIMPORT_NAME, NULL); |
| 789 | 904 spa_activate(spa); |
| 905 | |
| 906 /* | |
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907 * Pass off the heavy lifting to spa_load(). |
| 1732 | 908 * Pass TRUE for mosconfig because the user-supplied config |
| 909 * is actually the one to trust when doing an import. | |
| 789 | 910 */ |
| 1732 | 911 (void) spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE); |
| 789 | 912 |
| 913 /* | |
| 914 * If 'tryconfig' was at least parsable, return the current config. | |
| 915 */ | |
| 916 if (spa->spa_root_vdev != NULL) { | |
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917 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 918 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
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919 spa_config_exit(spa, FTAG); |
| 789 | 920 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, |
| 921 poolname) == 0); | |
| 922 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
| 923 state) == 0); | |
| 924 } | |
| 925 | |
| 926 spa_unload(spa); | |
| 927 spa_deactivate(spa); | |
| 928 spa_remove(spa); | |
| 929 mutex_exit(&spa_namespace_lock); | |
| 930 | |
| 931 return (config); | |
| 932 } | |
| 933 | |
| 934 /* | |
| 935 * Pool export/destroy | |
| 936 * | |
| 937 * The act of destroying or exporting a pool is very simple. We make sure there | |
| 938 * is no more pending I/O and any references to the pool are gone. Then, we | |
| 939 * update the pool state and sync all the labels to disk, removing the | |
| 940 * configuration from the cache afterwards. | |
| 941 */ | |
| 942 static int | |
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943 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig) |
| 789 | 944 { |
| 945 spa_t *spa; | |
| 946 | |
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947 if (oldconfig) |
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948 *oldconfig = NULL; |
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949 |
| 789 | 950 if (!(spa_mode & FWRITE)) |
| 951 return (EROFS); | |
| 952 | |
| 953 mutex_enter(&spa_namespace_lock); | |
| 954 if ((spa = spa_lookup(pool)) == NULL) { | |
| 955 mutex_exit(&spa_namespace_lock); | |
| 956 return (ENOENT); | |
| 957 } | |
| 958 | |
| 959 /* | |
| 1544 | 960 * Put a hold on the pool, drop the namespace lock, stop async tasks, |
| 961 * reacquire the namespace lock, and see if we can export. | |
| 962 */ | |
| 963 spa_open_ref(spa, FTAG); | |
| 964 mutex_exit(&spa_namespace_lock); | |
| 965 spa_async_suspend(spa); | |
| 966 mutex_enter(&spa_namespace_lock); | |
| 967 spa_close(spa, FTAG); | |
| 968 | |
| 969 /* | |
| 789 | 970 * The pool will be in core if it's openable, |
| 971 * in which case we can modify its state. | |
| 972 */ | |
| 973 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { | |
| 974 /* | |
| 975 * Objsets may be open only because they're dirty, so we | |
| 976 * have to force it to sync before checking spa_refcnt. | |
| 977 */ | |
| 978 spa_scrub_suspend(spa); | |
| 979 txg_wait_synced(spa->spa_dsl_pool, 0); | |
| 980 | |
| 1544 | 981 /* |
| 982 * A pool cannot be exported or destroyed if there are active | |
| 983 * references. If we are resetting a pool, allow references by | |
| 984 * fault injection handlers. | |
| 985 */ | |
| 986 if (!spa_refcount_zero(spa) || | |
| 987 (spa->spa_inject_ref != 0 && | |
| 988 new_state != POOL_STATE_UNINITIALIZED)) { | |
| 789 | 989 spa_scrub_resume(spa); |
| 1544 | 990 spa_async_resume(spa); |
| 789 | 991 mutex_exit(&spa_namespace_lock); |
| 992 return (EBUSY); | |
| 993 } | |
| 994 | |
| 995 spa_scrub_resume(spa); | |
| 996 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); | |
| 997 | |
| 998 /* | |
| 999 * We want this to be reflected on every label, | |
| 1000 * so mark them all dirty. spa_unload() will do the | |
| 1001 * final sync that pushes these changes out. | |
| 1002 */ | |
| 1544 | 1003 if (new_state != POOL_STATE_UNINITIALIZED) { |
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1004 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1544 | 1005 spa->spa_state = new_state; |
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1006 spa->spa_final_txg = spa_last_synced_txg(spa) + 1; |
| 1544 | 1007 vdev_config_dirty(spa->spa_root_vdev); |
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1008 spa_config_exit(spa, FTAG); |
| 1544 | 1009 } |
| 789 | 1010 } |
| 1011 | |
| 1012 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 1013 spa_unload(spa); | |
| 1014 spa_deactivate(spa); | |
| 1015 } | |
| 1016 | |
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1017 if (oldconfig && spa->spa_config) |
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1018 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); |
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1019 |
| 1544 | 1020 if (new_state != POOL_STATE_UNINITIALIZED) { |
| 1021 spa_remove(spa); | |
| 1022 spa_config_sync(); | |
| 1023 } | |
| 789 | 1024 mutex_exit(&spa_namespace_lock); |
| 1025 | |
| 1026 return (0); | |
| 1027 } | |
| 1028 | |
| 1029 /* | |
| 1030 * Destroy a storage pool. | |
| 1031 */ | |
| 1032 int | |
| 1033 spa_destroy(char *pool) | |
| 1034 { | |
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1035 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL)); |
| 789 | 1036 } |
| 1037 | |
| 1038 /* | |
| 1039 * Export a storage pool. | |
| 1040 */ | |
| 1041 int | |
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1042 spa_export(char *pool, nvlist_t **oldconfig) |
| 789 | 1043 { |
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1044 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig)); |
| 789 | 1045 } |
| 1046 | |
| 1047 /* | |
| 1544 | 1048 * Similar to spa_export(), this unloads the spa_t without actually removing it |
| 1049 * from the namespace in any way. | |
| 1050 */ | |
| 1051 int | |
| 1052 spa_reset(char *pool) | |
| 1053 { | |
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1054 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL)); |
| 1544 | 1055 } |
| 1056 | |
| 1057 | |
| 1058 /* | |
| 789 | 1059 * ========================================================================== |
| 1060 * Device manipulation | |
| 1061 * ========================================================================== | |
| 1062 */ | |
| 1063 | |
| 1064 /* | |
| 1065 * Add capacity to a storage pool. | |
| 1066 */ | |
| 1067 int | |
| 1068 spa_vdev_add(spa_t *spa, nvlist_t *nvroot) | |
| 1069 { | |
| 1070 uint64_t txg; | |
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1071 int c, error; |
| 789 | 1072 vdev_t *rvd = spa->spa_root_vdev; |
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1073 vdev_t *vd, *tvd; |
| 789 | 1074 |
| 1075 txg = spa_vdev_enter(spa); | |
| 1076 | |
| 1077 vd = spa_config_parse(spa, nvroot, NULL, 0, VDEV_ALLOC_ADD); | |
| 1078 | |
| 1079 if (vd == NULL) | |
| 1080 return (spa_vdev_exit(spa, vd, txg, EINVAL)); | |
| 1081 | |
| 1082 if ((error = vdev_create(vd, txg)) != 0) | |
| 1083 return (spa_vdev_exit(spa, vd, txg, error)); | |
| 1084 | |
| 1085 /* | |
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1086 * Transfer each new top-level vdev from vd to rvd. |
| 789 | 1087 */ |
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1088 for (c = 0; c < vd->vdev_children; c++) { |
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1089 tvd = vd->vdev_child[c]; |
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1090 vdev_remove_child(vd, tvd); |
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1091 tvd->vdev_id = rvd->vdev_children; |
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1092 vdev_add_child(rvd, tvd); |
| 789 | 1093 vdev_config_dirty(tvd); |
| 1094 } | |
| 1095 | |
| 1096 /* | |
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1097 * We have to be careful when adding new vdevs to an existing pool. |
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1098 * If other threads start allocating from these vdevs before we |
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1099 * sync the config cache, and we lose power, then upon reboot we may |
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1100 * fail to open the pool because there are DVAs that the config cache |
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1101 * can't translate. Therefore, we first add the vdevs without |
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1102 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); |
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1103 * and then let spa_config_update() initialize the new metaslabs. |
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1104 * |
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1105 * spa_load() checks for added-but-not-initialized vdevs, so that |
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1106 * if we lose power at any point in this sequence, the remaining |
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1107 * steps will be completed the next time we load the pool. |
| 789 | 1108 */ |
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1109 (void) spa_vdev_exit(spa, vd, txg, 0); |
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1110 |
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1111 mutex_enter(&spa_namespace_lock); |
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1112 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1113 mutex_exit(&spa_namespace_lock); |
| 789 | 1114 |
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1115 return (0); |
| 789 | 1116 } |
| 1117 | |
| 1118 /* | |
| 1119 * Attach a device to a mirror. The arguments are the path to any device | |
| 1120 * in the mirror, and the nvroot for the new device. If the path specifies | |
| 1121 * a device that is not mirrored, we automatically insert the mirror vdev. | |
| 1122 * | |
| 1123 * If 'replacing' is specified, the new device is intended to replace the | |
| 1124 * existing device; in this case the two devices are made into their own | |
| 1125 * mirror using the 'replacing' vdev, which is functionally idendical to | |
| 1126 * the mirror vdev (it actually reuses all the same ops) but has a few | |
| 1127 * extra rules: you can't attach to it after it's been created, and upon | |
| 1128 * completion of resilvering, the first disk (the one being replaced) | |
| 1129 * is automatically detached. | |
| 1130 */ | |
| 1131 int | |
| 1544 | 1132 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) |
| 789 | 1133 { |
| 1134 uint64_t txg, open_txg; | |
| 1135 int error; | |
| 1136 vdev_t *rvd = spa->spa_root_vdev; | |
| 1137 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; | |
| 1138 vdev_ops_t *pvops = replacing ? &vdev_replacing_ops : &vdev_mirror_ops; | |
| 1139 | |
| 1140 txg = spa_vdev_enter(spa); | |
| 1141 | |
| 1544 | 1142 oldvd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1143 |
| 1144 if (oldvd == NULL) | |
| 1145 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1146 | |
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1147 if (!oldvd->vdev_ops->vdev_op_leaf) |
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1148 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1149 |
| 789 | 1150 pvd = oldvd->vdev_parent; |
| 1151 | |
| 1152 /* | |
| 1153 * The parent must be a mirror or the root, unless we're replacing; | |
| 1154 * in that case, the parent can be anything but another replacing vdev. | |
| 1155 */ | |
| 1156 if (pvd->vdev_ops != &vdev_mirror_ops && | |
| 1157 pvd->vdev_ops != &vdev_root_ops && | |
| 1158 (!replacing || pvd->vdev_ops == &vdev_replacing_ops)) | |
| 1159 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1160 | |
| 1161 newrootvd = spa_config_parse(spa, nvroot, NULL, 0, VDEV_ALLOC_ADD); | |
| 1162 | |
| 1163 if (newrootvd == NULL || newrootvd->vdev_children != 1) | |
| 1164 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); | |
| 1165 | |
| 1166 newvd = newrootvd->vdev_child[0]; | |
| 1167 | |
| 1168 if (!newvd->vdev_ops->vdev_op_leaf) | |
| 1169 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); | |
| 1170 | |
| 1171 if ((error = vdev_create(newrootvd, txg)) != 0) | |
| 1172 return (spa_vdev_exit(spa, newrootvd, txg, error)); | |
| 1173 | |
|
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1174 /* |
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1175 * Compare the new device size with the replaceable/attachable |
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1176 * device size. |
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1177 */ |
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1178 if (newvd->vdev_psize < vdev_get_rsize(oldvd)) |
| 789 | 1179 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); |
| 1180 | |
| 1732 | 1181 /* |
| 1182 * The new device cannot have a higher alignment requirement | |
| 1183 * than the top-level vdev. | |
| 1184 */ | |
| 1185 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) | |
| 789 | 1186 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); |
| 1187 | |
| 1188 /* | |
| 1189 * If this is an in-place replacement, update oldvd's path and devid | |
| 1190 * to make it distinguishable from newvd, and unopenable from now on. | |
| 1191 */ | |
| 1192 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { | |
| 1193 spa_strfree(oldvd->vdev_path); | |
| 1194 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, | |
| 1195 KM_SLEEP); | |
| 1196 (void) sprintf(oldvd->vdev_path, "%s/%s", | |
| 1197 newvd->vdev_path, "old"); | |
| 1198 if (oldvd->vdev_devid != NULL) { | |
| 1199 spa_strfree(oldvd->vdev_devid); | |
| 1200 oldvd->vdev_devid = NULL; | |
| 1201 } | |
| 1202 } | |
| 1203 | |
| 1204 /* | |
| 1205 * If the parent is not a mirror, or if we're replacing, | |
| 1206 * insert the new mirror/replacing vdev above oldvd. | |
| 1207 */ | |
| 1208 if (pvd->vdev_ops != pvops) | |
| 1209 pvd = vdev_add_parent(oldvd, pvops); | |
| 1210 | |
| 1211 ASSERT(pvd->vdev_top->vdev_parent == rvd); | |
| 1212 ASSERT(pvd->vdev_ops == pvops); | |
| 1213 ASSERT(oldvd->vdev_parent == pvd); | |
| 1214 | |
| 1215 /* | |
| 1216 * Extract the new device from its root and add it to pvd. | |
| 1217 */ | |
| 1218 vdev_remove_child(newrootvd, newvd); | |
| 1219 newvd->vdev_id = pvd->vdev_children; | |
| 1220 vdev_add_child(pvd, newvd); | |
| 1221 | |
| 1544 | 1222 /* |
| 1223 * If newvd is smaller than oldvd, but larger than its rsize, | |
| 1224 * the addition of newvd may have decreased our parent's asize. | |
| 1225 */ | |
| 1226 pvd->vdev_asize = MIN(pvd->vdev_asize, newvd->vdev_asize); | |
| 1227 | |
| 789 | 1228 tvd = newvd->vdev_top; |
| 1229 ASSERT(pvd->vdev_top == tvd); | |
| 1230 ASSERT(tvd->vdev_parent == rvd); | |
| 1231 | |
| 1232 vdev_config_dirty(tvd); | |
| 1233 | |
| 1234 /* | |
| 1235 * Set newvd's DTL to [TXG_INITIAL, open_txg]. It will propagate | |
| 1236 * upward when spa_vdev_exit() calls vdev_dtl_reassess(). | |
| 1237 */ | |
| 1238 open_txg = txg + TXG_CONCURRENT_STATES - 1; | |
| 1239 | |
| 1240 mutex_enter(&newvd->vdev_dtl_lock); | |
| 1241 space_map_add(&newvd->vdev_dtl_map, TXG_INITIAL, | |
| 1242 open_txg - TXG_INITIAL + 1); | |
| 1243 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1244 | |
| 1544 | 1245 dprintf("attached %s in txg %llu\n", newvd->vdev_path, txg); |
| 1246 | |
| 789 | 1247 /* |
| 1248 * Mark newvd's DTL dirty in this txg. | |
| 1249 */ | |
| 1732 | 1250 vdev_dirty(tvd, VDD_DTL, newvd, txg); |
| 789 | 1251 |
| 1252 (void) spa_vdev_exit(spa, newrootvd, open_txg, 0); | |
| 1253 | |
| 1254 /* | |
| 1255 * Kick off a resilver to update newvd. | |
| 1256 */ | |
| 1257 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1258 | |
| 1259 return (0); | |
| 1260 } | |
| 1261 | |
| 1262 /* | |
| 1263 * Detach a device from a mirror or replacing vdev. | |
| 1264 * If 'replace_done' is specified, only detach if the parent | |
| 1265 * is a replacing vdev. | |
| 1266 */ | |
| 1267 int | |
| 1544 | 1268 spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) |
| 789 | 1269 { |
| 1270 uint64_t txg; | |
| 1271 int c, t, error; | |
| 1272 vdev_t *rvd = spa->spa_root_vdev; | |
| 1273 vdev_t *vd, *pvd, *cvd, *tvd; | |
| 1274 | |
| 1275 txg = spa_vdev_enter(spa); | |
| 1276 | |
| 1544 | 1277 vd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1278 |
| 1279 if (vd == NULL) | |
| 1280 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1281 | |
|
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1282 if (!vd->vdev_ops->vdev_op_leaf) |
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1283 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1284 |
| 789 | 1285 pvd = vd->vdev_parent; |
| 1286 | |
| 1287 /* | |
| 1288 * If replace_done is specified, only remove this device if it's | |
| 1289 * the first child of a replacing vdev. | |
| 1290 */ | |
| 1291 if (replace_done && | |
| 1292 (vd->vdev_id != 0 || pvd->vdev_ops != &vdev_replacing_ops)) | |
| 1293 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1294 | |
| 1295 /* | |
| 1296 * Only mirror and replacing vdevs support detach. | |
| 1297 */ | |
| 1298 if (pvd->vdev_ops != &vdev_replacing_ops && | |
| 1299 pvd->vdev_ops != &vdev_mirror_ops) | |
| 1300 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1301 | |
| 1302 /* | |
| 1303 * If there's only one replica, you can't detach it. | |
| 1304 */ | |
| 1305 if (pvd->vdev_children <= 1) | |
| 1306 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
| 1307 | |
| 1308 /* | |
| 1309 * If all siblings have non-empty DTLs, this device may have the only | |
| 1310 * valid copy of the data, which means we cannot safely detach it. | |
| 1311 * | |
| 1312 * XXX -- as in the vdev_offline() case, we really want a more | |
| 1313 * precise DTL check. | |
| 1314 */ | |
| 1315 for (c = 0; c < pvd->vdev_children; c++) { | |
| 1316 uint64_t dirty; | |
| 1317 | |
| 1318 cvd = pvd->vdev_child[c]; | |
| 1319 if (cvd == vd) | |
| 1320 continue; | |
| 1321 if (vdev_is_dead(cvd)) | |
| 1322 continue; | |
| 1323 mutex_enter(&cvd->vdev_dtl_lock); | |
| 1324 dirty = cvd->vdev_dtl_map.sm_space | | |
| 1325 cvd->vdev_dtl_scrub.sm_space; | |
| 1326 mutex_exit(&cvd->vdev_dtl_lock); | |
| 1327 if (!dirty) | |
| 1328 break; | |
| 1329 } | |
| 1330 if (c == pvd->vdev_children) | |
| 1331 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
| 1332 | |
| 1333 /* | |
| 1334 * Erase the disk labels so the disk can be used for other things. | |
| 1335 * This must be done after all other error cases are handled, | |
| 1336 * but before we disembowel vd (so we can still do I/O to it). | |
| 1337 * But if we can't do it, don't treat the error as fatal -- | |
| 1338 * it may be that the unwritability of the disk is the reason | |
| 1339 * it's being detached! | |
| 1340 */ | |
| 1341 error = vdev_label_init(vd, 0); | |
| 1342 if (error) | |
| 1343 dprintf("unable to erase labels on %s\n", vdev_description(vd)); | |
| 1344 | |
| 1345 /* | |
| 1346 * Remove vd from its parent and compact the parent's children. | |
| 1347 */ | |
| 1348 vdev_remove_child(pvd, vd); | |
| 1349 vdev_compact_children(pvd); | |
| 1350 | |
| 1351 /* | |
| 1352 * Remember one of the remaining children so we can get tvd below. | |
| 1353 */ | |
| 1354 cvd = pvd->vdev_child[0]; | |
| 1355 | |
| 1356 /* | |
| 1357 * If the parent mirror/replacing vdev only has one child, | |
| 1358 * the parent is no longer needed. Remove it from the tree. | |
| 1359 */ | |
| 1360 if (pvd->vdev_children == 1) | |
| 1361 vdev_remove_parent(cvd); | |
| 1362 | |
| 1363 /* | |
| 1364 * We don't set tvd until now because the parent we just removed | |
| 1365 * may have been the previous top-level vdev. | |
| 1366 */ | |
| 1367 tvd = cvd->vdev_top; | |
| 1368 ASSERT(tvd->vdev_parent == rvd); | |
| 1369 | |
| 1370 /* | |
| 1371 * Reopen this top-level vdev to reassess health after detach. | |
| 1372 */ | |
| 1544 | 1373 vdev_reopen(tvd); |
| 789 | 1374 |
| 1375 /* | |
| 1376 * If the device we just detached was smaller than the others, | |
| 1732 | 1377 * it may be possible to add metaslabs (i.e. grow the pool). |
| 1378 * vdev_metaslab_init() can't fail because the existing metaslabs | |
| 1379 * are already in core, so there's nothing to read from disk. | |
| 789 | 1380 */ |
| 1732 | 1381 VERIFY(vdev_metaslab_init(tvd, txg) == 0); |
| 789 | 1382 |
| 1383 vdev_config_dirty(tvd); | |
| 1384 | |
| 1385 /* | |
| 1386 * Mark vd's DTL as dirty in this txg. | |
| 1387 * vdev_dtl_sync() will see that vd->vdev_detached is set | |
| 1388 * and free vd's DTL object in syncing context. | |
| 1389 * But first make sure we're not on any *other* txg's DTL list, | |
| 1390 * to prevent vd from being accessed after it's freed. | |
| 1391 */ | |
| 1392 for (t = 0; t < TXG_SIZE; t++) | |
| 1393 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); | |
| 1732 | 1394 vd->vdev_detached = B_TRUE; |
| 1395 vdev_dirty(tvd, VDD_DTL, vd, txg); | |
| 789 | 1396 |
| 1544 | 1397 dprintf("detached %s in txg %llu\n", vd->vdev_path, txg); |
| 789 | 1398 |
| 1399 return (spa_vdev_exit(spa, vd, txg, 0)); | |
| 1400 } | |
| 1401 | |
| 1402 /* | |
| 1544 | 1403 * Find any device that's done replacing, so we can detach it. |
| 789 | 1404 */ |
| 1544 | 1405 static vdev_t * |
| 1406 spa_vdev_replace_done_hunt(vdev_t *vd) | |
| 789 | 1407 { |
| 1544 | 1408 vdev_t *newvd, *oldvd; |
| 789 | 1409 int c; |
| 1410 | |
| 1544 | 1411 for (c = 0; c < vd->vdev_children; c++) { |
| 1412 oldvd = spa_vdev_replace_done_hunt(vd->vdev_child[c]); | |
| 1413 if (oldvd != NULL) | |
| 1414 return (oldvd); | |
| 1415 } | |
| 789 | 1416 |
| 1417 if (vd->vdev_ops == &vdev_replacing_ops && vd->vdev_children == 2) { | |
| 1544 | 1418 oldvd = vd->vdev_child[0]; |
| 1419 newvd = vd->vdev_child[1]; | |
| 789 | 1420 |
| 1544 | 1421 mutex_enter(&newvd->vdev_dtl_lock); |
| 1422 if (newvd->vdev_dtl_map.sm_space == 0 && | |
| 1423 newvd->vdev_dtl_scrub.sm_space == 0) { | |
| 1424 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1425 return (oldvd); | |
| 1426 } | |
| 1427 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1428 } | |
| 789 | 1429 |
| 1544 | 1430 return (NULL); |
| 789 | 1431 } |
| 1432 | |
| 1544 | 1433 static void |
| 789 | 1434 spa_vdev_replace_done(spa_t *spa) |
| 1435 { | |
| 1544 | 1436 vdev_t *vd; |
| 1437 uint64_t guid; | |
| 789 | 1438 |
| 1544 | 1439 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 1440 |
| 1544 | 1441 while ((vd = spa_vdev_replace_done_hunt(spa->spa_root_vdev)) != NULL) { |
| 1442 guid = vd->vdev_guid; | |
| 1443 spa_config_exit(spa, FTAG); | |
| 1444 if (spa_vdev_detach(spa, guid, B_TRUE) != 0) | |
| 1445 return; | |
| 1446 spa_config_enter(spa, RW_READER, FTAG); | |
| 789 | 1447 } |
| 1448 | |
| 1544 | 1449 spa_config_exit(spa, FTAG); |
| 789 | 1450 } |
| 1451 | |
| 1452 /* | |
|
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1453 * Update the stored path for this vdev. Dirty the vdev configuration, relying |
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1454 * on spa_vdev_enter/exit() to synchronize the labels and cache. |
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1455 */ |
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1456 int |
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1457 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) |
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1458 { |
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1459 vdev_t *rvd, *vd; |
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1460 uint64_t txg; |
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1461 |
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1462 rvd = spa->spa_root_vdev; |
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1463 |
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1464 txg = spa_vdev_enter(spa); |
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1465 |
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1466 if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) |
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1467 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); |
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1468 |
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1469 if (!vd->vdev_ops->vdev_op_leaf) |
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1470 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1471 |
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1472 spa_strfree(vd->vdev_path); |
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1473 vd->vdev_path = spa_strdup(newpath); |
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1474 |
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1475 vdev_config_dirty(vd->vdev_top); |
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1476 |
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1477 return (spa_vdev_exit(spa, NULL, txg, 0)); |
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1478 } |
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1479 |
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1480 /* |
| 789 | 1481 * ========================================================================== |
| 1482 * SPA Scrubbing | |
| 1483 * ========================================================================== | |
| 1484 */ | |
| 1485 | |
| 1544 | 1486 void |
| 1487 spa_scrub_throttle(spa_t *spa, int direction) | |
| 1488 { | |
| 1489 mutex_enter(&spa->spa_scrub_lock); | |
| 1490 spa->spa_scrub_throttled += direction; | |
| 1491 ASSERT(spa->spa_scrub_throttled >= 0); | |
| 1492 if (spa->spa_scrub_throttled == 0) | |
| 1493 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 1494 mutex_exit(&spa->spa_scrub_lock); | |
| 1495 } | |
| 789 | 1496 |
| 1497 static void | |
| 1498 spa_scrub_io_done(zio_t *zio) | |
| 1499 { | |
| 1500 spa_t *spa = zio->io_spa; | |
| 1501 | |
| 1502 zio_buf_free(zio->io_data, zio->io_size); | |
| 1503 | |
| 1504 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 1505 if (zio->io_error && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { |
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1506 vdev_t *vd = zio->io_vd ? zio->io_vd : spa->spa_root_vdev; |
| 789 | 1507 spa->spa_scrub_errors++; |
| 1508 mutex_enter(&vd->vdev_stat_lock); | |
| 1509 vd->vdev_stat.vs_scrub_errors++; | |
| 1510 mutex_exit(&vd->vdev_stat_lock); | |
| 1511 } | |
| 1544 | 1512 if (--spa->spa_scrub_inflight == 0) { |
| 1513 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 1514 ASSERT(spa->spa_scrub_throttled == 0); | |
| 1515 } | |
| 1516 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 1517 } |
| 1518 | |
| 1519 static void | |
| 1544 | 1520 spa_scrub_io_start(spa_t *spa, blkptr_t *bp, int priority, int flags, |
| 1521 zbookmark_t *zb) | |
| 789 | 1522 { |
| 1523 size_t size = BP_GET_LSIZE(bp); | |
| 1524 void *data = zio_buf_alloc(size); | |
| 1525 | |
| 1526 mutex_enter(&spa->spa_scrub_lock); | |
| 1527 spa->spa_scrub_inflight++; | |
| 1528 mutex_exit(&spa->spa_scrub_lock); | |
| 1529 | |
| 1544 | 1530 if (zb->zb_level == -1 && BP_GET_TYPE(bp) != DMU_OT_OBJSET) |
| 1531 flags |= ZIO_FLAG_SPECULATIVE; /* intent log block */ | |
| 1532 | |
| 1533 flags |= ZIO_FLAG_CANFAIL; | |
| 1534 | |
| 789 | 1535 zio_nowait(zio_read(NULL, spa, bp, data, size, |
| 1544 | 1536 spa_scrub_io_done, NULL, priority, flags, zb)); |
| 789 | 1537 } |
| 1538 | |
| 1539 /* ARGSUSED */ | |
| 1540 static int | |
| 1541 spa_scrub_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a) | |
| 1542 { | |
| 1543 blkptr_t *bp = &bc->bc_blkptr; | |
|
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1544 vdev_t *vd = spa->spa_root_vdev; |
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1545 dva_t *dva = bp->blk_dva; |
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1546 int needs_resilver = B_FALSE; |
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1547 int d; |
| 789 | 1548 |
|
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1549 if (bc->bc_errno) { |
| 789 | 1550 /* |
| 1551 * We can't scrub this block, but we can continue to scrub | |
| 1552 * the rest of the pool. Note the error and move along. | |
| 1553 */ | |
| 1554 mutex_enter(&spa->spa_scrub_lock); | |
| 1555 spa->spa_scrub_errors++; | |
| 1556 mutex_exit(&spa->spa_scrub_lock); | |
| 1557 | |
|
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1558 mutex_enter(&vd->vdev_stat_lock); |
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1559 vd->vdev_stat.vs_scrub_errors++; |
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1560 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 1561 |
| 1562 return (ERESTART); | |
| 1563 } | |
| 1564 | |
| 1565 ASSERT(bp->blk_birth < spa->spa_scrub_maxtxg); | |
| 1566 | |
|
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1567 for (d = 0; d < BP_GET_NDVAS(bp); d++) { |
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1568 vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dva[d])); |
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1569 |
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1570 ASSERT(vd != NULL); |
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1571 |
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1572 /* |
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1573 * Keep track of how much data we've examined so that |
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1574 * zpool(1M) status can make useful progress reports. |
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1575 */ |
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1576 mutex_enter(&vd->vdev_stat_lock); |
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1577 vd->vdev_stat.vs_scrub_examined += DVA_GET_ASIZE(&dva[d]); |
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1578 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 1579 |
|
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1580 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER) { |
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1581 if (DVA_GET_GANG(&dva[d])) { |
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1582 /* |
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1583 * Gang members may be spread across multiple |
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1584 * vdevs, so the best we can do is look at the |
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1585 * pool-wide DTL. |
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1586 * XXX -- it would be better to change our |
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1587 * allocation policy to ensure that this can't |
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1588 * happen. |
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1589 */ |
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1590 vd = spa->spa_root_vdev; |
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1591 } |
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1592 if (vdev_dtl_contains(&vd->vdev_dtl_map, |
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1593 bp->blk_birth, 1)) |
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1594 needs_resilver = B_TRUE; |
| 789 | 1595 } |
|
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1596 } |
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1597 |
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1598 if (spa->spa_scrub_type == POOL_SCRUB_EVERYTHING) |
| 789 | 1599 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_SCRUB, |
| 1544 | 1600 ZIO_FLAG_SCRUB, &bc->bc_bookmark); |
|
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1601 else if (needs_resilver) |
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1602 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_RESILVER, |
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1603 ZIO_FLAG_RESILVER, &bc->bc_bookmark); |
| 789 | 1604 |
| 1605 return (0); | |
| 1606 } | |
| 1607 | |
| 1608 static void | |
| 1609 spa_scrub_thread(spa_t *spa) | |
| 1610 { | |
| 1611 callb_cpr_t cprinfo; | |
| 1612 traverse_handle_t *th = spa->spa_scrub_th; | |
| 1613 vdev_t *rvd = spa->spa_root_vdev; | |
| 1614 pool_scrub_type_t scrub_type = spa->spa_scrub_type; | |
| 1615 int error = 0; | |
| 1616 boolean_t complete; | |
| 1617 | |
| 1618 CALLB_CPR_INIT(&cprinfo, &spa->spa_scrub_lock, callb_generic_cpr, FTAG); | |
| 1619 | |
|
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1620 /* |
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1621 * If we're restarting due to a snapshot create/delete, |
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1622 * wait for that to complete. |
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1623 */ |
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1624 txg_wait_synced(spa_get_dsl(spa), 0); |
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1625 |
| 1544 | 1626 dprintf("start %s mintxg=%llu maxtxg=%llu\n", |
| 1627 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 1628 spa->spa_scrub_mintxg, spa->spa_scrub_maxtxg); | |
| 1629 | |
| 1630 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1631 vdev_reopen(rvd); /* purge all vdev caches */ | |
| 789 | 1632 vdev_config_dirty(rvd); /* rewrite all disk labels */ |
| 1633 vdev_scrub_stat_update(rvd, scrub_type, B_FALSE); | |
| 1544 | 1634 spa_config_exit(spa, FTAG); |
| 789 | 1635 |
| 1636 mutex_enter(&spa->spa_scrub_lock); | |
| 1637 spa->spa_scrub_errors = 0; | |
| 1638 spa->spa_scrub_active = 1; | |
| 1544 | 1639 ASSERT(spa->spa_scrub_inflight == 0); |
| 1640 ASSERT(spa->spa_scrub_throttled == 0); | |
| 789 | 1641 |
| 1642 while (!spa->spa_scrub_stop) { | |
| 1643 CALLB_CPR_SAFE_BEGIN(&cprinfo); | |
| 1544 | 1644 while (spa->spa_scrub_suspended) { |
| 789 | 1645 spa->spa_scrub_active = 0; |
| 1646 cv_broadcast(&spa->spa_scrub_cv); | |
| 1647 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 1648 spa->spa_scrub_active = 1; | |
| 1649 } | |
| 1650 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_scrub_lock); | |
| 1651 | |
| 1652 if (spa->spa_scrub_restart_txg != 0) | |
| 1653 break; | |
| 1654 | |
| 1655 mutex_exit(&spa->spa_scrub_lock); | |
| 1656 error = traverse_more(th); | |
| 1657 mutex_enter(&spa->spa_scrub_lock); | |
| 1658 if (error != EAGAIN) | |
| 1659 break; | |
| 1544 | 1660 |
| 1661 while (spa->spa_scrub_throttled > 0) | |
| 1662 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 789 | 1663 } |
| 1664 | |
| 1665 while (spa->spa_scrub_inflight) | |
| 1666 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 1667 | |
|
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1668 spa->spa_scrub_active = 0; |
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1669 cv_broadcast(&spa->spa_scrub_cv); |
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1670 |
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1671 mutex_exit(&spa->spa_scrub_lock); |
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1672 |
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1673 spa_config_enter(spa, RW_WRITER, FTAG); |
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1674 |
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1675 mutex_enter(&spa->spa_scrub_lock); |
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1676 |
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1677 /* |
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1678 * Note: we check spa_scrub_restart_txg under both spa_scrub_lock |
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1679 * AND the spa config lock to synchronize with any config changes |
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1680 * that revise the DTLs under spa_vdev_enter() / spa_vdev_exit(). |
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1681 */ |
| 789 | 1682 if (spa->spa_scrub_restart_txg != 0) |
| 1683 error = ERESTART; | |
| 1684 | |
| 1544 | 1685 if (spa->spa_scrub_stop) |
| 1686 error = EINTR; | |
| 1687 | |
| 789 | 1688 /* |
| 1544 | 1689 * Even if there were uncorrectable errors, we consider the scrub |
| 1690 * completed. The downside is that if there is a transient error during | |
| 1691 * a resilver, we won't resilver the data properly to the target. But | |
| 1692 * if the damage is permanent (more likely) we will resilver forever, | |
| 1693 * which isn't really acceptable. Since there is enough information for | |
| 1694 * the user to know what has failed and why, this seems like a more | |
| 1695 * tractable approach. | |
| 789 | 1696 */ |
| 1544 | 1697 complete = (error == 0); |
| 789 | 1698 |
| 1544 | 1699 dprintf("end %s to maxtxg=%llu %s, traverse=%d, %llu errors, stop=%u\n", |
| 1700 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 789 | 1701 spa->spa_scrub_maxtxg, complete ? "done" : "FAILED", |
| 1702 error, spa->spa_scrub_errors, spa->spa_scrub_stop); | |
| 1703 | |
| 1704 mutex_exit(&spa->spa_scrub_lock); | |
| 1705 | |
| 1706 /* | |
| 1707 * If the scrub/resilver completed, update all DTLs to reflect this. | |
| 1708 * Whether it succeeded or not, vacate all temporary scrub DTLs. | |
| 1709 */ | |
| 1710 vdev_dtl_reassess(rvd, spa_last_synced_txg(spa) + 1, | |
| 1711 complete ? spa->spa_scrub_maxtxg : 0, B_TRUE); | |
| 1712 vdev_scrub_stat_update(rvd, POOL_SCRUB_NONE, complete); | |
| 1544 | 1713 spa_errlog_rotate(spa); |
|
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1714 |
| 1544 | 1715 spa_config_exit(spa, FTAG); |
| 789 | 1716 |
| 1717 mutex_enter(&spa->spa_scrub_lock); | |
| 1718 | |
| 1544 | 1719 /* |
| 1720 * We may have finished replacing a device. | |
| 1721 * Let the async thread assess this and handle the detach. | |
| 1722 */ | |
| 1723 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); | |
| 789 | 1724 |
| 1725 /* | |
| 1726 * If we were told to restart, our final act is to start a new scrub. | |
| 1727 */ | |
| 1728 if (error == ERESTART) | |
| 1544 | 1729 spa_async_request(spa, scrub_type == POOL_SCRUB_RESILVER ? |
| 1730 SPA_ASYNC_RESILVER : SPA_ASYNC_SCRUB); | |
| 789 | 1731 |
| 1544 | 1732 spa->spa_scrub_type = POOL_SCRUB_NONE; |
| 1733 spa->spa_scrub_active = 0; | |
| 1734 spa->spa_scrub_thread = NULL; | |
| 1735 cv_broadcast(&spa->spa_scrub_cv); | |
| 789 | 1736 CALLB_CPR_EXIT(&cprinfo); /* drops &spa->spa_scrub_lock */ |
| 1737 thread_exit(); | |
| 1738 } | |
| 1739 | |
| 1740 void | |
| 1741 spa_scrub_suspend(spa_t *spa) | |
| 1742 { | |
| 1743 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 1744 spa->spa_scrub_suspended++; |
| 789 | 1745 while (spa->spa_scrub_active) { |
| 1746 cv_broadcast(&spa->spa_scrub_cv); | |
| 1747 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 1748 } | |
| 1749 while (spa->spa_scrub_inflight) | |
| 1750 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 1751 mutex_exit(&spa->spa_scrub_lock); | |
| 1752 } | |
| 1753 | |
| 1754 void | |
| 1755 spa_scrub_resume(spa_t *spa) | |
| 1756 { | |
| 1757 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 1758 ASSERT(spa->spa_scrub_suspended != 0); |
| 1759 if (--spa->spa_scrub_suspended == 0) | |
| 789 | 1760 cv_broadcast(&spa->spa_scrub_cv); |
| 1761 mutex_exit(&spa->spa_scrub_lock); | |
| 1762 } | |
| 1763 | |
| 1764 void | |
| 1765 spa_scrub_restart(spa_t *spa, uint64_t txg) | |
| 1766 { | |
| 1767 /* | |
| 1768 * Something happened (e.g. snapshot create/delete) that means | |
| 1769 * we must restart any in-progress scrubs. The itinerary will | |
| 1770 * fix this properly. | |
| 1771 */ | |
| 1772 mutex_enter(&spa->spa_scrub_lock); | |
| 1773 spa->spa_scrub_restart_txg = txg; | |
| 1774 mutex_exit(&spa->spa_scrub_lock); | |
| 1775 } | |
| 1776 | |
| 1544 | 1777 int |
| 1778 spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force) | |
| 789 | 1779 { |
| 1780 space_seg_t *ss; | |
| 1781 uint64_t mintxg, maxtxg; | |
| 1782 vdev_t *rvd = spa->spa_root_vdev; | |
| 1783 | |
| 1784 if ((uint_t)type >= POOL_SCRUB_TYPES) | |
| 1785 return (ENOTSUP); | |
| 1786 | |
| 1544 | 1787 mutex_enter(&spa->spa_scrub_lock); |
| 1788 | |
| 789 | 1789 /* |
| 1790 * If there's a scrub or resilver already in progress, stop it. | |
| 1791 */ | |
| 1792 while (spa->spa_scrub_thread != NULL) { | |
| 1793 /* | |
| 1794 * Don't stop a resilver unless forced. | |
| 1795 */ | |
| 1544 | 1796 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER && !force) { |
| 1797 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 1798 return (EBUSY); |
| 1544 | 1799 } |
| 789 | 1800 spa->spa_scrub_stop = 1; |
| 1801 cv_broadcast(&spa->spa_scrub_cv); | |
| 1802 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 1803 } | |
| 1804 | |
| 1805 /* | |
| 1806 * Terminate the previous traverse. | |
| 1807 */ | |
| 1808 if (spa->spa_scrub_th != NULL) { | |
| 1809 traverse_fini(spa->spa_scrub_th); | |
| 1810 spa->spa_scrub_th = NULL; | |
| 1811 } | |
| 1812 | |
| 1544 | 1813 if (rvd == NULL) { |
| 1814 ASSERT(spa->spa_scrub_stop == 0); | |
| 1815 ASSERT(spa->spa_scrub_type == type); | |
| 1816 ASSERT(spa->spa_scrub_restart_txg == 0); | |
| 1817 mutex_exit(&spa->spa_scrub_lock); | |
| 1818 return (0); | |
| 1819 } | |
| 789 | 1820 |
| 1821 mintxg = TXG_INITIAL - 1; | |
| 1822 maxtxg = spa_last_synced_txg(spa) + 1; | |
| 1823 | |
| 1544 | 1824 mutex_enter(&rvd->vdev_dtl_lock); |
| 789 | 1825 |
| 1544 | 1826 if (rvd->vdev_dtl_map.sm_space == 0) { |
| 1827 /* | |
| 1828 * The pool-wide DTL is empty. | |
| 1732 | 1829 * If this is a resilver, there's nothing to do except |
| 1830 * check whether any in-progress replacements have completed. | |
| 1544 | 1831 */ |
| 1732 | 1832 if (type == POOL_SCRUB_RESILVER) { |
| 1544 | 1833 type = POOL_SCRUB_NONE; |
| 1732 | 1834 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); |
| 1835 } | |
| 1544 | 1836 } else { |
| 1837 /* | |
| 1838 * The pool-wide DTL is non-empty. | |
| 1839 * If this is a normal scrub, upgrade to a resilver instead. | |
| 1840 */ | |
| 1841 if (type == POOL_SCRUB_EVERYTHING) | |
| 1842 type = POOL_SCRUB_RESILVER; | |
| 1843 } | |
| 789 | 1844 |
| 1544 | 1845 if (type == POOL_SCRUB_RESILVER) { |
| 789 | 1846 /* |
| 1847 * Determine the resilvering boundaries. | |
| 1848 * | |
| 1849 * Note: (mintxg, maxtxg) is an open interval, | |
| 1850 * i.e. mintxg and maxtxg themselves are not included. | |
| 1851 * | |
| 1852 * Note: for maxtxg, we MIN with spa_last_synced_txg(spa) + 1 | |
| 1853 * so we don't claim to resilver a txg that's still changing. | |
| 1854 */ | |
| 1855 ss = avl_first(&rvd->vdev_dtl_map.sm_root); | |
| 1544 | 1856 mintxg = ss->ss_start - 1; |
| 789 | 1857 ss = avl_last(&rvd->vdev_dtl_map.sm_root); |
| 1544 | 1858 maxtxg = MIN(ss->ss_end, maxtxg); |
| 789 | 1859 } |
| 1860 | |
| 1544 | 1861 mutex_exit(&rvd->vdev_dtl_lock); |
| 1862 | |
| 1863 spa->spa_scrub_stop = 0; | |
| 1864 spa->spa_scrub_type = type; | |
| 1865 spa->spa_scrub_restart_txg = 0; | |
| 1866 | |
| 1867 if (type != POOL_SCRUB_NONE) { | |
| 1868 spa->spa_scrub_mintxg = mintxg; | |
| 789 | 1869 spa->spa_scrub_maxtxg = maxtxg; |
| 1870 spa->spa_scrub_th = traverse_init(spa, spa_scrub_cb, NULL, | |
|
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1871 ADVANCE_PRE | ADVANCE_PRUNE | ADVANCE_ZIL, |
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1872 ZIO_FLAG_CANFAIL); |
| 789 | 1873 traverse_add_pool(spa->spa_scrub_th, mintxg, maxtxg); |
| 1874 spa->spa_scrub_thread = thread_create(NULL, 0, | |
| 1875 spa_scrub_thread, spa, 0, &p0, TS_RUN, minclsyspri); | |
| 1876 } | |
| 1877 | |
| 1544 | 1878 mutex_exit(&spa->spa_scrub_lock); |
| 1879 | |
| 789 | 1880 return (0); |
| 1881 } | |
| 1882 | |
| 1544 | 1883 /* |
| 1884 * ========================================================================== | |
| 1885 * SPA async task processing | |
| 1886 * ========================================================================== | |
| 1887 */ | |
| 1888 | |
| 1889 static void | |
| 1890 spa_async_reopen(spa_t *spa) | |
| 789 | 1891 { |
| 1544 | 1892 vdev_t *rvd = spa->spa_root_vdev; |
| 1893 vdev_t *tvd; | |
| 1894 int c; | |
| 1895 | |
| 1896 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1897 | |
| 1898 for (c = 0; c < rvd->vdev_children; c++) { | |
| 1899 tvd = rvd->vdev_child[c]; | |
| 1900 if (tvd->vdev_reopen_wanted) { | |
| 1901 tvd->vdev_reopen_wanted = 0; | |
| 1902 vdev_reopen(tvd); | |
| 1903 } | |
| 1904 } | |
| 789 | 1905 |
| 1544 | 1906 spa_config_exit(spa, FTAG); |
| 1907 } | |
| 1908 | |
| 1909 static void | |
| 1910 spa_async_thread(spa_t *spa) | |
| 1911 { | |
| 1912 int tasks; | |
| 1913 | |
| 1914 ASSERT(spa->spa_sync_on); | |
| 789 | 1915 |
| 1544 | 1916 mutex_enter(&spa->spa_async_lock); |
| 1917 tasks = spa->spa_async_tasks; | |
| 1918 spa->spa_async_tasks = 0; | |
| 1919 mutex_exit(&spa->spa_async_lock); | |
| 1920 | |
| 1921 /* | |
|
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1922 * See if the config needs to be updated. |
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1923 */ |
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1924 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { |
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1925 mutex_enter(&spa_namespace_lock); |
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1926 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1927 mutex_exit(&spa_namespace_lock); |
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1928 } |
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1929 |
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1930 /* |
| 1544 | 1931 * See if any devices need to be reopened. |
| 1932 */ | |
| 1933 if (tasks & SPA_ASYNC_REOPEN) | |
| 1934 spa_async_reopen(spa); | |
| 1935 | |
| 1936 /* | |
| 1937 * If any devices are done replacing, detach them. | |
| 1938 */ | |
| 1939 if (tasks & SPA_ASYNC_REPLACE_DONE) | |
| 789 | 1940 spa_vdev_replace_done(spa); |
| 1941 | |
| 1544 | 1942 /* |
| 1943 * Kick off a scrub. | |
| 1944 */ | |
| 1945 if (tasks & SPA_ASYNC_SCRUB) | |
| 1946 VERIFY(spa_scrub(spa, POOL_SCRUB_EVERYTHING, B_TRUE) == 0); | |
| 1947 | |
| 1948 /* | |
| 1949 * Kick off a resilver. | |
| 1950 */ | |
| 1951 if (tasks & SPA_ASYNC_RESILVER) | |
| 1952 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1953 | |
| 1954 /* | |
| 1955 * Let the world know that we're done. | |
| 1956 */ | |
| 1957 mutex_enter(&spa->spa_async_lock); | |
| 1958 spa->spa_async_thread = NULL; | |
| 1959 cv_broadcast(&spa->spa_async_cv); | |
| 1960 mutex_exit(&spa->spa_async_lock); | |
| 1961 thread_exit(); | |
| 1962 } | |
| 1963 | |
| 1964 void | |
| 1965 spa_async_suspend(spa_t *spa) | |
| 1966 { | |
| 1967 mutex_enter(&spa->spa_async_lock); | |
| 1968 spa->spa_async_suspended++; | |
| 1969 while (spa->spa_async_thread != NULL) | |
| 1970 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); | |
| 1971 mutex_exit(&spa->spa_async_lock); | |
| 1972 } | |
| 1973 | |
| 1974 void | |
| 1975 spa_async_resume(spa_t *spa) | |
| 1976 { | |
| 1977 mutex_enter(&spa->spa_async_lock); | |
| 1978 ASSERT(spa->spa_async_suspended != 0); | |
| 1979 spa->spa_async_suspended--; | |
| 1980 mutex_exit(&spa->spa_async_lock); | |
| 1981 } | |
| 1982 | |
| 1983 static void | |
| 1984 spa_async_dispatch(spa_t *spa) | |
| 1985 { | |
| 1986 mutex_enter(&spa->spa_async_lock); | |
| 1987 if (spa->spa_async_tasks && !spa->spa_async_suspended && | |
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1988 spa->spa_async_thread == NULL && |
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1989 rootdir != NULL && !vn_is_readonly(rootdir)) |
| 1544 | 1990 spa->spa_async_thread = thread_create(NULL, 0, |
| 1991 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); | |
| 1992 mutex_exit(&spa->spa_async_lock); | |
| 1993 } | |
| 1994 | |
| 1995 void | |
| 1996 spa_async_request(spa_t *spa, int task) | |
| 1997 { | |
| 1998 mutex_enter(&spa->spa_async_lock); | |
| 1999 spa->spa_async_tasks |= task; | |
| 2000 mutex_exit(&spa->spa_async_lock); | |
| 789 | 2001 } |
| 2002 | |
| 2003 /* | |
| 2004 * ========================================================================== | |
| 2005 * SPA syncing routines | |
| 2006 * ========================================================================== | |
| 2007 */ | |
| 2008 | |
| 2009 static void | |
| 2010 spa_sync_deferred_frees(spa_t *spa, uint64_t txg) | |
| 2011 { | |
| 2012 bplist_t *bpl = &spa->spa_sync_bplist; | |
| 2013 dmu_tx_t *tx; | |
| 2014 blkptr_t blk; | |
| 2015 uint64_t itor = 0; | |
| 2016 zio_t *zio; | |
| 2017 int error; | |
| 2018 uint8_t c = 1; | |
| 2019 | |
| 2020 zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CONFIG_HELD); | |
| 2021 | |
| 2022 while (bplist_iterate(bpl, &itor, &blk) == 0) | |
| 2023 zio_nowait(zio_free(zio, spa, txg, &blk, NULL, NULL)); | |
| 2024 | |
| 2025 error = zio_wait(zio); | |
| 2026 ASSERT3U(error, ==, 0); | |
| 2027 | |
| 2028 tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
| 2029 bplist_vacate(bpl, tx); | |
| 2030 | |
| 2031 /* | |
| 2032 * Pre-dirty the first block so we sync to convergence faster. | |
| 2033 * (Usually only the first block is needed.) | |
| 2034 */ | |
| 2035 dmu_write(spa->spa_meta_objset, spa->spa_sync_bplist_obj, 0, 1, &c, tx); | |
| 2036 dmu_tx_commit(tx); | |
| 2037 } | |
| 2038 | |
| 2039 static void | |
| 2040 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) | |
| 2041 { | |
| 2042 nvlist_t *config; | |
| 2043 char *packed = NULL; | |
| 2044 size_t nvsize = 0; | |
| 2045 dmu_buf_t *db; | |
| 2046 | |
| 2047 if (list_is_empty(&spa->spa_dirty_list)) | |
| 2048 return; | |
| 2049 | |
| 2050 config = spa_config_generate(spa, NULL, dmu_tx_get_txg(tx), B_FALSE); | |
| 2051 | |
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2052 if (spa->spa_config_syncing) |
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2053 nvlist_free(spa->spa_config_syncing); |
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2054 spa->spa_config_syncing = config; |
| 789 | 2055 |
| 2056 VERIFY(nvlist_size(config, &nvsize, NV_ENCODE_XDR) == 0); | |
| 2057 | |
| 2058 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 2059 | |
| 1544 | 2060 VERIFY(nvlist_pack(config, &packed, &nvsize, NV_ENCODE_XDR, |
| 2061 KM_SLEEP) == 0); | |
| 789 | 2062 |
| 2063 dmu_write(spa->spa_meta_objset, spa->spa_config_object, 0, nvsize, | |
| 2064 packed, tx); | |
| 2065 | |
| 2066 kmem_free(packed, nvsize); | |
| 2067 | |
| 1544 | 2068 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, |
| 2069 spa->spa_config_object, FTAG, &db)); | |
| 789 | 2070 dmu_buf_will_dirty(db, tx); |
| 2071 *(uint64_t *)db->db_data = nvsize; | |
| 1544 | 2072 dmu_buf_rele(db, FTAG); |
| 789 | 2073 } |
| 2074 | |
| 2075 /* | |
| 2076 * Sync the specified transaction group. New blocks may be dirtied as | |
| 2077 * part of the process, so we iterate until it converges. | |
| 2078 */ | |
| 2079 void | |
| 2080 spa_sync(spa_t *spa, uint64_t txg) | |
| 2081 { | |
| 2082 dsl_pool_t *dp = spa->spa_dsl_pool; | |
| 2083 objset_t *mos = spa->spa_meta_objset; | |
| 2084 bplist_t *bpl = &spa->spa_sync_bplist; | |
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2085 vdev_t *rvd = spa->spa_root_vdev; |
| 789 | 2086 vdev_t *vd; |
| 2087 dmu_tx_t *tx; | |
| 2088 int dirty_vdevs; | |
| 2089 | |
| 2090 /* | |
| 2091 * Lock out configuration changes. | |
| 2092 */ | |
| 1544 | 2093 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2094 |
| 2095 spa->spa_syncing_txg = txg; | |
| 2096 spa->spa_sync_pass = 0; | |
| 2097 | |
| 1544 | 2098 VERIFY(0 == bplist_open(bpl, mos, spa->spa_sync_bplist_obj)); |
| 789 | 2099 |
| 2100 /* | |
| 2101 * If anything has changed in this txg, push the deferred frees | |
| 2102 * from the previous txg. If not, leave them alone so that we | |
| 2103 * don't generate work on an otherwise idle system. | |
| 2104 */ | |
| 2105 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || | |
| 2106 !txg_list_empty(&dp->dp_dirty_dirs, txg)) | |
| 2107 spa_sync_deferred_frees(spa, txg); | |
| 2108 | |
| 2109 /* | |
| 2110 * Iterate to convergence. | |
| 2111 */ | |
| 2112 do { | |
| 2113 spa->spa_sync_pass++; | |
| 2114 | |
| 2115 tx = dmu_tx_create_assigned(dp, txg); | |
| 2116 spa_sync_config_object(spa, tx); | |
| 2117 dmu_tx_commit(tx); | |
| 2118 | |
| 1544 | 2119 spa_errlog_sync(spa, txg); |
| 2120 | |
| 789 | 2121 dsl_pool_sync(dp, txg); |
| 2122 | |
| 2123 dirty_vdevs = 0; | |
| 2124 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) { | |
| 2125 vdev_sync(vd, txg); | |
| 2126 dirty_vdevs++; | |
| 2127 } | |
| 2128 | |
| 2129 tx = dmu_tx_create_assigned(dp, txg); | |
| 2130 bplist_sync(bpl, tx); | |
| 2131 dmu_tx_commit(tx); | |
| 2132 | |
| 2133 } while (dirty_vdevs); | |
| 2134 | |
| 2135 bplist_close(bpl); | |
| 2136 | |
| 2137 dprintf("txg %llu passes %d\n", txg, spa->spa_sync_pass); | |
| 2138 | |
| 2139 /* | |
| 2140 * Rewrite the vdev configuration (which includes the uberblock) | |
| 2141 * to commit the transaction group. | |
|
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2142 * |
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2143 * If there are any dirty vdevs, sync the uberblock to all vdevs. |
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2144 * Otherwise, pick a random top-level vdev that's known to be |
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2145 * visible in the config cache (see spa_vdev_add() for details). |
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2146 * If the write fails, try the next vdev until we're tried them all. |
| 789 | 2147 */ |
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2148 if (!list_is_empty(&spa->spa_dirty_list)) { |
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2149 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2150 } else { |
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2151 int children = rvd->vdev_children; |
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2152 int c0 = spa_get_random(children); |
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2153 int c; |
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2154 |
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2155 for (c = 0; c < children; c++) { |
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2156 vd = rvd->vdev_child[(c0 + c) % children]; |
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2157 if (vd->vdev_ms_array == 0) |
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2158 continue; |
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2159 if (vdev_config_sync(vd, txg) == 0) |
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2160 break; |
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2161 } |
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2162 if (c == children) |
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2163 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2164 } |
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2165 |
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2166 /* |
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2167 * Clear the dirty config list. |
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2168 */ |
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2169 while ((vd = list_head(&spa->spa_dirty_list)) != NULL) |
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2170 vdev_config_clean(vd); |
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2171 |
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2172 /* |
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2173 * Now that the new config has synced transactionally, |
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2174 * let it become visible to the config cache. |
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2175 */ |
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2176 if (spa->spa_config_syncing != NULL) { |
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2177 spa_config_set(spa, spa->spa_config_syncing); |
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2178 spa->spa_config_txg = txg; |
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2179 spa->spa_config_syncing = NULL; |
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2180 } |
| 789 | 2181 |
| 2182 /* | |
| 2183 * Make a stable copy of the fully synced uberblock. | |
| 2184 * We use this as the root for pool traversals. | |
| 2185 */ | |
| 2186 spa->spa_traverse_wanted = 1; /* tells traverse_more() to stop */ | |
| 2187 | |
| 2188 spa_scrub_suspend(spa); /* stop scrubbing and finish I/Os */ | |
| 2189 | |
| 2190 rw_enter(&spa->spa_traverse_lock, RW_WRITER); | |
| 2191 spa->spa_traverse_wanted = 0; | |
| 2192 spa->spa_ubsync = spa->spa_uberblock; | |
| 2193 rw_exit(&spa->spa_traverse_lock); | |
| 2194 | |
| 2195 spa_scrub_resume(spa); /* resume scrub with new ubsync */ | |
| 2196 | |
| 2197 /* | |
| 2198 * Clean up the ZIL records for the synced txg. | |
| 2199 */ | |
| 2200 dsl_pool_zil_clean(dp); | |
| 2201 | |
| 2202 /* | |
| 2203 * Update usable space statistics. | |
| 2204 */ | |
| 2205 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) | |
| 2206 vdev_sync_done(vd, txg); | |
| 2207 | |
| 2208 /* | |
| 2209 * It had better be the case that we didn't dirty anything | |
| 2210 * since spa_sync_labels(). | |
| 2211 */ | |
| 2212 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); | |
| 2213 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); | |
| 2214 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); | |
| 2215 ASSERT(bpl->bpl_queue == NULL); | |
| 2216 | |
| 1544 | 2217 spa_config_exit(spa, FTAG); |
| 2218 | |
| 2219 /* | |
| 2220 * If any async tasks have been requested, kick them off. | |
| 2221 */ | |
| 2222 spa_async_dispatch(spa); | |
| 789 | 2223 } |
| 2224 | |
| 2225 /* | |
| 2226 * Sync all pools. We don't want to hold the namespace lock across these | |
| 2227 * operations, so we take a reference on the spa_t and drop the lock during the | |
| 2228 * sync. | |
| 2229 */ | |
| 2230 void | |
| 2231 spa_sync_allpools(void) | |
| 2232 { | |
| 2233 spa_t *spa = NULL; | |
| 2234 mutex_enter(&spa_namespace_lock); | |
| 2235 while ((spa = spa_next(spa)) != NULL) { | |
| 2236 if (spa_state(spa) != POOL_STATE_ACTIVE) | |
| 2237 continue; | |
| 2238 spa_open_ref(spa, FTAG); | |
| 2239 mutex_exit(&spa_namespace_lock); | |
| 2240 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 2241 mutex_enter(&spa_namespace_lock); | |
| 2242 spa_close(spa, FTAG); | |
| 2243 } | |
| 2244 mutex_exit(&spa_namespace_lock); | |
| 2245 } | |
| 2246 | |
| 2247 /* | |
| 2248 * ========================================================================== | |
| 2249 * Miscellaneous routines | |
| 2250 * ========================================================================== | |
| 2251 */ | |
| 2252 | |
| 2253 /* | |
| 2254 * Remove all pools in the system. | |
| 2255 */ | |
| 2256 void | |
| 2257 spa_evict_all(void) | |
| 2258 { | |
| 2259 spa_t *spa; | |
| 2260 | |
| 2261 /* | |
| 2262 * Remove all cached state. All pools should be closed now, | |
| 2263 * so every spa in the AVL tree should be unreferenced. | |
| 2264 */ | |
| 2265 mutex_enter(&spa_namespace_lock); | |
| 2266 while ((spa = spa_next(NULL)) != NULL) { | |
| 2267 /* | |
| 1544 | 2268 * Stop async tasks. The async thread may need to detach |
| 2269 * a device that's been replaced, which requires grabbing | |
| 2270 * spa_namespace_lock, so we must drop it here. | |
| 789 | 2271 */ |
| 2272 spa_open_ref(spa, FTAG); | |
| 2273 mutex_exit(&spa_namespace_lock); | |
| 1544 | 2274 spa_async_suspend(spa); |
| 789 | 2275 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); |
| 2276 mutex_enter(&spa_namespace_lock); | |
| 2277 spa_close(spa, FTAG); | |
| 2278 | |
| 2279 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 2280 spa_unload(spa); | |
| 2281 spa_deactivate(spa); | |
| 2282 } | |
| 2283 spa_remove(spa); | |
| 2284 } | |
| 2285 mutex_exit(&spa_namespace_lock); | |
| 2286 } | |
| 1544 | 2287 |
| 2288 vdev_t * | |
| 2289 spa_lookup_by_guid(spa_t *spa, uint64_t guid) | |
| 2290 { | |
| 2291 return (vdev_lookup_by_guid(spa->spa_root_vdev, guid)); | |
| 2292 } | |
| 1760 | 2293 |
| 2294 void | |
| 2295 spa_upgrade(spa_t *spa) | |
| 2296 { | |
| 2297 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2298 | |
| 2299 /* | |
| 2300 * This should only be called for a non-faulted pool, and since a | |
| 2301 * future version would result in an unopenable pool, this shouldn't be | |
| 2302 * possible. | |
| 2303 */ | |
| 2304 ASSERT(spa->spa_uberblock.ub_version <= ZFS_VERSION); | |
| 2305 | |
| 2306 spa->spa_uberblock.ub_version = ZFS_VERSION; | |
| 2307 vdev_config_dirty(spa->spa_root_vdev); | |
| 2308 | |
| 2309 spa_config_exit(spa, FTAG); | |
| 2310 } |