Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/spa.c @ 1585:4ad213e858a9
6395480 ztest ASSERT: rbt.bt_objset == wbt.bt_objset, line 2041
6395485 ensure the gu in vdev_guid
6395487 config cache can become stale relative to mosconfig
6395488 vdev addition must sync to config cache before allocation begins
| author | bonwick |
|---|---|
| date | Thu, 09 Mar 2006 16:56:05 -0800 |
| parents | 938876158511 |
| children | 438b928f80c7 |
| 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 static uint32_t spa_active_count; | |
| 58 | |
| 59 /* | |
| 60 * ========================================================================== | |
| 61 * SPA state manipulation (open/create/destroy/import/export) | |
| 62 * ========================================================================== | |
| 63 */ | |
| 64 | |
| 1544 | 65 static int |
| 66 spa_error_entry_compare(const void *a, const void *b) | |
| 67 { | |
| 68 spa_error_entry_t *sa = (spa_error_entry_t *)a; | |
| 69 spa_error_entry_t *sb = (spa_error_entry_t *)b; | |
| 70 int ret; | |
| 71 | |
| 72 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, | |
| 73 sizeof (zbookmark_t)); | |
| 74 | |
| 75 if (ret < 0) | |
| 76 return (-1); | |
| 77 else if (ret > 0) | |
| 78 return (1); | |
| 79 else | |
| 80 return (0); | |
| 81 } | |
| 82 | |
| 83 /* | |
| 84 * Utility function which retrieves copies of the current logs and | |
| 85 * re-initializes them in the process. | |
| 86 */ | |
| 87 void | |
| 88 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) | |
| 89 { | |
| 90 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); | |
| 91 | |
| 92 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); | |
| 93 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); | |
| 94 | |
| 95 avl_create(&spa->spa_errlist_scrub, | |
| 96 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 97 offsetof(spa_error_entry_t, se_avl)); | |
| 98 avl_create(&spa->spa_errlist_last, | |
| 99 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 100 offsetof(spa_error_entry_t, se_avl)); | |
| 101 } | |
| 102 | |
| 789 | 103 /* |
| 104 * Activate an uninitialized pool. | |
| 105 */ | |
| 106 static void | |
| 107 spa_activate(spa_t *spa) | |
| 108 { | |
| 109 int t; | |
| 110 | |
| 111 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); | |
| 112 | |
| 113 spa->spa_state = POOL_STATE_ACTIVE; | |
| 114 | |
| 115 spa->spa_normal_class = metaslab_class_create(); | |
| 116 | |
| 117 for (t = 0; t < ZIO_TYPES; t++) { | |
| 118 spa->spa_zio_issue_taskq[t] = taskq_create("spa_zio_issue", | |
| 119 8, maxclsyspri, 50, INT_MAX, | |
| 120 TASKQ_PREPOPULATE); | |
| 121 spa->spa_zio_intr_taskq[t] = taskq_create("spa_zio_intr", | |
| 122 8, maxclsyspri, 50, INT_MAX, | |
| 123 TASKQ_PREPOPULATE); | |
| 124 } | |
| 125 | |
| 126 rw_init(&spa->spa_traverse_lock, NULL, RW_DEFAULT, NULL); | |
| 127 | |
| 128 list_create(&spa->spa_dirty_list, sizeof (vdev_t), | |
| 129 offsetof(vdev_t, vdev_dirty_node)); | |
| 130 | |
| 131 txg_list_create(&spa->spa_vdev_txg_list, | |
| 132 offsetof(struct vdev, vdev_txg_node)); | |
| 1544 | 133 |
| 134 avl_create(&spa->spa_errlist_scrub, | |
| 135 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 136 offsetof(spa_error_entry_t, se_avl)); | |
| 137 avl_create(&spa->spa_errlist_last, | |
| 138 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 139 offsetof(spa_error_entry_t, se_avl)); | |
| 789 | 140 } |
| 141 | |
| 142 /* | |
| 143 * Opposite of spa_activate(). | |
| 144 */ | |
| 145 static void | |
| 146 spa_deactivate(spa_t *spa) | |
| 147 { | |
| 148 int t; | |
| 149 | |
| 150 ASSERT(spa->spa_sync_on == B_FALSE); | |
| 151 ASSERT(spa->spa_dsl_pool == NULL); | |
| 152 ASSERT(spa->spa_root_vdev == NULL); | |
| 153 | |
| 154 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); | |
| 155 | |
| 156 txg_list_destroy(&spa->spa_vdev_txg_list); | |
| 157 | |
| 158 list_destroy(&spa->spa_dirty_list); | |
| 159 | |
| 160 rw_destroy(&spa->spa_traverse_lock); | |
| 161 | |
| 162 for (t = 0; t < ZIO_TYPES; t++) { | |
| 163 taskq_destroy(spa->spa_zio_issue_taskq[t]); | |
| 164 taskq_destroy(spa->spa_zio_intr_taskq[t]); | |
| 165 spa->spa_zio_issue_taskq[t] = NULL; | |
| 166 spa->spa_zio_intr_taskq[t] = NULL; | |
| 167 } | |
| 168 | |
| 169 metaslab_class_destroy(spa->spa_normal_class); | |
| 170 spa->spa_normal_class = NULL; | |
| 171 | |
| 1544 | 172 /* |
| 173 * If this was part of an import or the open otherwise failed, we may | |
| 174 * still have errors left in the queues. Empty them just in case. | |
| 175 */ | |
| 176 spa_errlog_drain(spa); | |
| 177 | |
| 178 avl_destroy(&spa->spa_errlist_scrub); | |
| 179 avl_destroy(&spa->spa_errlist_last); | |
| 180 | |
| 789 | 181 spa->spa_state = POOL_STATE_UNINITIALIZED; |
| 182 } | |
| 183 | |
| 184 /* | |
| 185 * Verify a pool configuration, and construct the vdev tree appropriately. This | |
| 186 * will create all the necessary vdevs in the appropriate layout, with each vdev | |
| 187 * in the CLOSED state. This will prep the pool before open/creation/import. | |
| 188 * All vdev validation is done by the vdev_alloc() routine. | |
| 189 */ | |
| 190 static vdev_t * | |
| 191 spa_config_parse(spa_t *spa, nvlist_t *nv, vdev_t *parent, uint_t id, int atype) | |
| 192 { | |
| 193 nvlist_t **child; | |
| 194 uint_t c, children; | |
| 195 vdev_t *vd; | |
| 196 | |
| 197 if ((vd = vdev_alloc(spa, nv, parent, id, atype)) == NULL) | |
| 198 return (NULL); | |
| 199 | |
| 200 if (vd->vdev_ops->vdev_op_leaf) | |
| 201 return (vd); | |
| 202 | |
| 203 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
| 204 &child, &children) != 0) { | |
| 205 vdev_free(vd); | |
| 206 return (NULL); | |
| 207 } | |
| 208 | |
| 209 for (c = 0; c < children; c++) { | |
| 210 if (spa_config_parse(spa, child[c], vd, c, atype) == NULL) { | |
| 211 vdev_free(vd); | |
| 212 return (NULL); | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 return (vd); | |
| 217 } | |
| 218 | |
| 219 /* | |
| 220 * Opposite of spa_load(). | |
| 221 */ | |
| 222 static void | |
| 223 spa_unload(spa_t *spa) | |
| 224 { | |
| 225 /* | |
| 1544 | 226 * Stop async tasks. |
| 227 */ | |
| 228 spa_async_suspend(spa); | |
| 229 | |
| 230 /* | |
| 789 | 231 * Stop syncing. |
| 232 */ | |
| 233 if (spa->spa_sync_on) { | |
| 234 txg_sync_stop(spa->spa_dsl_pool); | |
| 235 spa->spa_sync_on = B_FALSE; | |
| 236 } | |
| 237 | |
| 238 /* | |
| 239 * Wait for any outstanding prefetch I/O to complete. | |
| 240 */ | |
| 1544 | 241 spa_config_enter(spa, RW_WRITER, FTAG); |
| 242 spa_config_exit(spa, FTAG); | |
| 789 | 243 |
| 244 /* | |
| 245 * Close the dsl pool. | |
| 246 */ | |
| 247 if (spa->spa_dsl_pool) { | |
| 248 dsl_pool_close(spa->spa_dsl_pool); | |
| 249 spa->spa_dsl_pool = NULL; | |
| 250 } | |
| 251 | |
| 252 /* | |
| 253 * Close all vdevs. | |
| 254 */ | |
|
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255 if (spa->spa_root_vdev) |
| 789 | 256 vdev_free(spa->spa_root_vdev); |
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257 ASSERT(spa->spa_root_vdev == NULL); |
| 1544 | 258 |
| 259 spa->spa_async_suspended = 0; | |
| 789 | 260 } |
| 261 | |
| 262 /* | |
| 263 * Load an existing storage pool, using the pool's builtin spa_config as a | |
| 1544 | 264 * source of configuration information. |
| 789 | 265 */ |
| 266 static int | |
| 1544 | 267 spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) |
| 789 | 268 { |
| 269 int error = 0; | |
|
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270 uint64_t config_cache_txg = spa->spa_config_txg; |
| 789 | 271 nvlist_t *nvroot = NULL; |
| 272 vdev_t *rvd; | |
| 273 uberblock_t *ub = &spa->spa_uberblock; | |
| 274 uint64_t pool_guid; | |
| 275 zio_t *zio; | |
| 276 | |
| 1544 | 277 spa->spa_load_state = state; |
| 789 | 278 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || |
| 1544 | 279 nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) { |
| 280 error = EINVAL; | |
| 281 goto out; | |
| 282 } | |
| 789 | 283 |
| 284 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, | |
| 285 &spa->spa_config_txg); | |
| 286 | |
| 1544 | 287 if ((spa->spa_load_state == SPA_LOAD_IMPORT || |
| 288 spa->spa_load_state == SPA_LOAD_TRYIMPORT) && | |
| 289 spa_guid_exists(pool_guid, 0)) { | |
| 290 error = EEXIST; | |
| 291 goto out; | |
| 292 } | |
| 789 | 293 |
| 294 /* | |
| 295 * Parse the configuration into a vdev tree. | |
| 296 */ | |
| 1544 | 297 spa_config_enter(spa, RW_WRITER, FTAG); |
| 789 | 298 rvd = spa_config_parse(spa, nvroot, NULL, 0, VDEV_ALLOC_LOAD); |
| 1544 | 299 spa_config_exit(spa, FTAG); |
| 789 | 300 |
| 1544 | 301 if (rvd == NULL) { |
| 302 error = EINVAL; | |
| 303 goto out; | |
| 304 } | |
| 789 | 305 |
|
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306 ASSERT(spa->spa_root_vdev == rvd); |
| 789 | 307 ASSERT(spa_guid(spa) == pool_guid); |
| 308 | |
| 309 /* | |
| 310 * Try to open all vdevs, loading each label in the process. | |
| 311 */ | |
| 1544 | 312 if (vdev_open(rvd) != 0) { |
| 313 error = ENXIO; | |
| 314 goto out; | |
| 315 } | |
| 789 | 316 |
| 317 /* | |
| 318 * Find the best uberblock. | |
| 319 */ | |
| 320 bzero(ub, sizeof (uberblock_t)); | |
| 321 | |
| 322 zio = zio_root(spa, NULL, NULL, | |
| 323 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); | |
| 324 vdev_uberblock_load(zio, rvd, ub); | |
| 325 error = zio_wait(zio); | |
| 326 | |
| 327 /* | |
| 328 * If we weren't able to find a single valid uberblock, return failure. | |
| 329 */ | |
| 330 if (ub->ub_txg == 0) { | |
| 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 */ | |
| 338 if (ub->ub_version > UBERBLOCK_VERSION) { | |
| 339 error = ENOTSUP; | |
| 340 goto out; | |
| 789 | 341 } |
| 342 | |
| 343 /* | |
| 344 * If the vdev guid sum doesn't match the uberblock, we have an | |
| 345 * incomplete configuration. | |
| 346 */ | |
| 347 if (rvd->vdev_guid_sum != ub->ub_guid_sum && mosconfig) { | |
| 1544 | 348 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 349 VDEV_AUX_BAD_GUID_SUM); | |
| 350 error = ENXIO; | |
| 351 goto out; | |
| 789 | 352 } |
| 353 | |
| 354 /* | |
| 355 * Initialize internal SPA structures. | |
| 356 */ | |
| 357 spa->spa_state = POOL_STATE_ACTIVE; | |
| 358 spa->spa_ubsync = spa->spa_uberblock; | |
| 359 spa->spa_first_txg = spa_last_synced_txg(spa) + 1; | |
| 1544 | 360 error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool); |
| 361 if (error) { | |
| 362 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 363 VDEV_AUX_CORRUPT_DATA); | |
| 364 goto out; | |
| 365 } | |
| 789 | 366 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; |
| 367 | |
| 1544 | 368 if (zap_lookup(spa->spa_meta_objset, |
| 789 | 369 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 370 sizeof (uint64_t), 1, &spa->spa_config_object) != 0) { |
| 371 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 372 VDEV_AUX_CORRUPT_DATA); | |
| 373 error = EIO; | |
| 374 goto out; | |
| 375 } | |
| 789 | 376 |
| 377 if (!mosconfig) { | |
| 378 dmu_buf_t *db; | |
| 379 char *packed = NULL; | |
| 380 size_t nvsize = 0; | |
| 381 nvlist_t *newconfig = NULL; | |
| 382 | |
| 1544 | 383 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, |
| 384 spa->spa_config_object, FTAG, &db)); | |
| 789 | 385 nvsize = *(uint64_t *)db->db_data; |
| 1544 | 386 dmu_buf_rele(db, FTAG); |
| 789 | 387 |
| 388 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 1544 | 389 error = dmu_read(spa->spa_meta_objset, |
| 789 | 390 spa->spa_config_object, 0, nvsize, packed); |
| 391 if (error == 0) | |
| 392 error = nvlist_unpack(packed, nvsize, &newconfig, 0); | |
| 393 kmem_free(packed, nvsize); | |
| 394 | |
| 1544 | 395 if (error) { |
| 396 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 397 VDEV_AUX_CORRUPT_DATA); | |
| 398 error = EIO; | |
| 399 goto out; | |
| 400 } | |
| 789 | 401 |
| 402 spa_config_set(spa, newconfig); | |
| 403 | |
| 404 spa_unload(spa); | |
| 405 spa_deactivate(spa); | |
| 406 spa_activate(spa); | |
| 407 | |
| 1544 | 408 return (spa_load(spa, newconfig, state, B_TRUE)); |
| 409 } | |
| 410 | |
| 411 if (zap_lookup(spa->spa_meta_objset, | |
| 412 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, | |
| 413 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj) != 0) { | |
| 414 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 415 VDEV_AUX_CORRUPT_DATA); | |
| 416 error = EIO; | |
| 417 goto out; | |
| 789 | 418 } |
| 419 | |
| 1544 | 420 /* |
| 421 * Load the persistent error log. If we have an older pool, this will | |
| 422 * not be present. | |
| 423 */ | |
| 424 error = zap_lookup(spa->spa_meta_objset, | |
| 425 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_LAST, | |
| 426 sizeof (uint64_t), 1, &spa->spa_errlog_last); | |
| 427 if (error != 0 &&error != ENOENT) { | |
| 428 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 429 VDEV_AUX_CORRUPT_DATA); | |
| 430 error = EIO; | |
| 431 goto out; | |
| 432 } | |
| 433 | |
| 434 error = zap_lookup(spa->spa_meta_objset, | |
| 435 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_SCRUB, | |
| 436 sizeof (uint64_t), 1, &spa->spa_errlog_scrub); | |
| 437 if (error != 0 && error != ENOENT) { | |
| 438 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 439 VDEV_AUX_CORRUPT_DATA); | |
| 440 error = EIO; | |
| 441 goto out; | |
| 442 } | |
| 789 | 443 |
| 444 /* | |
| 1544 | 445 * Load the vdev state for all top level vdevs. We need to grab the |
| 446 * config lock because all label I/O is done with the | |
| 447 * ZIO_FLAG_CONFIG_HELD flag. | |
| 789 | 448 */ |
| 1544 | 449 spa_config_enter(spa, RW_READER, FTAG); |
| 450 if ((error = vdev_load(rvd)) != 0) { | |
| 451 spa_config_exit(spa, FTAG); | |
| 452 goto out; | |
| 453 } | |
| 454 spa_config_exit(spa, FTAG); | |
| 789 | 455 |
| 456 /* | |
| 457 * Propagate the leaf DTLs we just loaded all the way up the tree. | |
| 458 */ | |
| 1544 | 459 spa_config_enter(spa, RW_WRITER, FTAG); |
| 789 | 460 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); |
| 1544 | 461 spa_config_exit(spa, FTAG); |
| 789 | 462 |
| 463 /* | |
| 464 * Check the state of the root vdev. If it can't be opened, it | |
| 465 * indicates one or more toplevel vdevs are faulted. | |
| 466 */ | |
| 1544 | 467 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
| 468 error = ENXIO; | |
| 469 goto out; | |
| 470 } | |
| 789 | 471 |
| 472 /* | |
| 473 * Claim log blocks that haven't been committed yet, and update all | |
| 474 * top-level vdevs to sync any config changes found in vdev_load(). | |
| 475 * This must all happen in a single txg. | |
| 476 */ | |
| 1544 | 477 if ((spa_mode & FWRITE) && state != SPA_LOAD_TRYIMPORT) { |
|
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changeset
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478 int c; |
| 789 | 479 dmu_tx_t *tx = dmu_tx_create_assigned(spa_get_dsl(spa), |
| 480 spa_first_txg(spa)); | |
| 481 dmu_objset_find(spa->spa_name, zil_claim, tx, 0); | |
| 482 vdev_config_dirty(rvd); | |
| 483 dmu_tx_commit(tx); | |
| 484 | |
| 485 spa->spa_sync_on = B_TRUE; | |
| 486 txg_sync_start(spa->spa_dsl_pool); | |
| 487 | |
| 488 /* | |
| 489 * Wait for all claims to sync. | |
| 490 */ | |
| 491 txg_wait_synced(spa->spa_dsl_pool, 0); | |
|
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492 |
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6395480 ztest ASSERT: rbt.bt_objset == wbt.bt_objset, line 2041
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493 /* |
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494 * If the config cache is stale relative to the mosconfig, |
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495 * sync the config cache. |
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496 */ |
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497 if (config_cache_txg != spa->spa_config_txg) |
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498 spa_config_sync(); |
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499 |
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500 /* |
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501 * If we have top-level vdevs that were added but have |
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502 * not yet been prepared for allocation, do that now. |
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503 * (It's safe now because the config cache is up to date, |
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504 * so it will be able to translate the new DVAs.) |
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505 * See comments in spa_vdev_add() for full details. |
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506 */ |
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507 for (c = 0; c < rvd->vdev_children; c++) { |
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508 vdev_t *tvd = rvd->vdev_child[c]; |
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509 if (tvd->vdev_ms_array == 0) { |
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510 uint64_t txg = spa_last_synced_txg(spa) + 1; |
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511 ASSERT(tvd->vdev_ms_shift == 0); |
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512 spa_config_enter(spa, RW_WRITER, FTAG); |
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513 vdev_init(tvd, txg); |
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514 vdev_config_dirty(tvd); |
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515 spa_config_set(spa, |
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516 spa_config_generate(spa, rvd, txg, 0)); |
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517 spa_config_exit(spa, FTAG); |
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518 txg_wait_synced(spa->spa_dsl_pool, txg); |
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519 ASSERT(tvd->vdev_ms_shift != 0); |
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520 ASSERT(tvd->vdev_ms_array != 0); |
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521 spa_config_sync(); |
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522 } |
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523 } |
| 789 | 524 } |
| 525 | |
| 1544 | 526 error = 0; |
| 527 out: | |
| 528 if (error) | |
| 529 zfs_ereport_post(FM_EREPORT_ZFS_POOL, spa, NULL, NULL, 0, 0); | |
| 530 spa->spa_load_state = SPA_LOAD_NONE; | |
| 531 spa->spa_ena = 0; | |
| 532 | |
| 533 return (error); | |
| 789 | 534 } |
| 535 | |
| 536 /* | |
| 537 * Pool Open/Import | |
| 538 * | |
| 539 * The import case is identical to an open except that the configuration is sent | |
| 540 * down from userland, instead of grabbed from the configuration cache. For the | |
| 541 * case of an open, the pool configuration will exist in the | |
| 542 * POOL_STATE_UNITIALIZED state. | |
| 543 * | |
| 544 * The stats information (gen/count/ustats) is used to gather vdev statistics at | |
| 545 * the same time open the pool, without having to keep around the spa_t in some | |
| 546 * ambiguous state. | |
| 547 */ | |
| 548 static int | |
| 549 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) | |
| 550 { | |
| 551 spa_t *spa; | |
| 552 int error; | |
| 553 int loaded = B_FALSE; | |
| 554 int locked = B_FALSE; | |
| 555 | |
| 556 *spapp = NULL; | |
| 557 | |
| 558 /* | |
| 559 * As disgusting as this is, we need to support recursive calls to this | |
| 560 * function because dsl_dir_open() is called during spa_load(), and ends | |
| 561 * up calling spa_open() again. The real fix is to figure out how to | |
| 562 * avoid dsl_dir_open() calling this in the first place. | |
| 563 */ | |
| 564 if (mutex_owner(&spa_namespace_lock) != curthread) { | |
| 565 mutex_enter(&spa_namespace_lock); | |
| 566 locked = B_TRUE; | |
| 567 } | |
| 568 | |
| 569 if ((spa = spa_lookup(pool)) == NULL) { | |
| 570 if (locked) | |
| 571 mutex_exit(&spa_namespace_lock); | |
| 572 return (ENOENT); | |
| 573 } | |
| 574 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { | |
| 575 | |
| 576 spa_activate(spa); | |
| 577 | |
| 578 error = spa_load(spa, spa->spa_config, | |
| 1544 | 579 SPA_LOAD_OPEN, B_FALSE); |
| 789 | 580 |
| 581 if (error == EBADF) { | |
| 582 /* | |
| 583 * If vdev_load() returns EBADF, it indicates that one | |
| 584 * of the vdevs indicates that the pool has been | |
| 585 * exported or destroyed. If this is the case, the | |
| 586 * config cache is out of sync and we should remove the | |
| 587 * pool from the namespace. | |
| 588 */ | |
| 589 spa_unload(spa); | |
| 590 spa_deactivate(spa); | |
| 591 spa_remove(spa); | |
| 592 spa_config_sync(); | |
| 593 if (locked) | |
| 594 mutex_exit(&spa_namespace_lock); | |
| 595 return (ENOENT); | |
| 1544 | 596 } |
| 597 | |
| 598 if (error) { | |
| 789 | 599 /* |
| 600 * We can't open the pool, but we still have useful | |
| 601 * information: the state of each vdev after the | |
| 602 * attempted vdev_open(). Return this to the user. | |
| 603 */ | |
| 604 if (config != NULL && spa->spa_root_vdev != NULL) | |
| 605 *config = spa_config_generate(spa, NULL, -1ULL, | |
| 606 B_TRUE); | |
| 607 spa_unload(spa); | |
| 608 spa_deactivate(spa); | |
| 1544 | 609 spa->spa_last_open_failed = B_TRUE; |
| 789 | 610 if (locked) |
| 611 mutex_exit(&spa_namespace_lock); | |
| 612 *spapp = NULL; | |
| 613 return (error); | |
| 1544 | 614 } else { |
| 615 zfs_post_ok(spa, NULL); | |
| 616 spa->spa_last_open_failed = B_FALSE; | |
| 789 | 617 } |
| 618 | |
| 619 loaded = B_TRUE; | |
| 620 } | |
| 621 | |
| 622 spa_open_ref(spa, tag); | |
| 623 if (locked) | |
| 624 mutex_exit(&spa_namespace_lock); | |
| 625 | |
| 626 *spapp = spa; | |
| 627 | |
| 628 if (config != NULL) { | |
| 1544 | 629 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 630 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
| 1544 | 631 spa_config_exit(spa, FTAG); |
| 789 | 632 } |
| 633 | |
| 634 /* | |
| 635 * If we just loaded the pool, resilver anything that's out of date. | |
| 636 */ | |
| 637 if (loaded && (spa_mode & FWRITE)) | |
| 638 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 639 | |
| 640 return (0); | |
| 641 } | |
| 642 | |
| 643 int | |
| 644 spa_open(const char *name, spa_t **spapp, void *tag) | |
| 645 { | |
| 646 return (spa_open_common(name, spapp, tag, NULL)); | |
| 647 } | |
| 648 | |
| 1544 | 649 /* |
| 650 * Lookup the given spa_t, incrementing the inject count in the process, | |
| 651 * preventing it from being exported or destroyed. | |
| 652 */ | |
| 653 spa_t * | |
| 654 spa_inject_addref(char *name) | |
| 655 { | |
| 656 spa_t *spa; | |
| 657 | |
| 658 mutex_enter(&spa_namespace_lock); | |
| 659 if ((spa = spa_lookup(name)) == NULL) { | |
| 660 mutex_exit(&spa_namespace_lock); | |
| 661 return (NULL); | |
| 662 } | |
| 663 spa->spa_inject_ref++; | |
| 664 mutex_exit(&spa_namespace_lock); | |
| 665 | |
| 666 return (spa); | |
| 667 } | |
| 668 | |
| 669 void | |
| 670 spa_inject_delref(spa_t *spa) | |
| 671 { | |
| 672 mutex_enter(&spa_namespace_lock); | |
| 673 spa->spa_inject_ref--; | |
| 674 mutex_exit(&spa_namespace_lock); | |
| 675 } | |
| 676 | |
| 789 | 677 int |
| 1544 | 678 spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) |
| 789 | 679 { |
| 680 int error; | |
| 681 spa_t *spa; | |
| 682 | |
| 683 *config = NULL; | |
| 684 error = spa_open_common(name, &spa, FTAG, config); | |
| 685 | |
| 1544 | 686 if (spa && *config != NULL) |
| 687 VERIFY(nvlist_add_uint64(*config, ZPOOL_CONFIG_ERRCOUNT, | |
| 688 spa_get_errlog_size(spa)) == 0); | |
| 689 | |
| 690 /* | |
| 691 * We want to get the alternate root even for faulted pools, so we cheat | |
| 692 * and call spa_lookup() directly. | |
| 693 */ | |
| 694 if (altroot) { | |
| 695 if (spa == NULL) { | |
| 696 mutex_enter(&spa_namespace_lock); | |
| 697 spa = spa_lookup(name); | |
| 698 if (spa) | |
| 699 spa_altroot(spa, altroot, buflen); | |
| 700 else | |
| 701 altroot[0] = '\0'; | |
| 702 spa = NULL; | |
| 703 mutex_exit(&spa_namespace_lock); | |
| 704 } else { | |
| 705 spa_altroot(spa, altroot, buflen); | |
| 706 } | |
| 707 } | |
| 708 | |
| 789 | 709 if (spa != NULL) |
| 710 spa_close(spa, FTAG); | |
| 711 | |
| 712 return (error); | |
| 713 } | |
| 714 | |
| 715 /* | |
| 716 * Pool Creation | |
| 717 */ | |
| 718 int | |
| 719 spa_create(const char *pool, nvlist_t *nvroot, char *altroot) | |
| 720 { | |
| 721 spa_t *spa; | |
| 722 dsl_pool_t *dp; | |
| 723 dmu_tx_t *tx; | |
| 724 int error; | |
| 725 uint64_t txg = TXG_INITIAL; | |
| 726 | |
| 727 /* | |
| 728 * If this pool already exists, return failure. | |
| 729 */ | |
| 730 mutex_enter(&spa_namespace_lock); | |
| 731 if (spa_lookup(pool) != NULL) { | |
| 732 mutex_exit(&spa_namespace_lock); | |
| 733 return (EEXIST); | |
| 734 } | |
| 735 spa = spa_add(pool); | |
| 736 | |
| 737 /* | |
| 738 * Allocate a new spa_t structure. | |
| 739 */ | |
| 740 spa_activate(spa); | |
| 741 | |
| 742 spa->spa_uberblock.ub_txg = txg - 1; | |
| 743 spa->spa_ubsync = spa->spa_uberblock; | |
| 744 | |
| 745 error = spa_vdev_add(spa, nvroot); | |
| 746 | |
| 747 if (error) { | |
| 748 spa_unload(spa); | |
| 749 spa_deactivate(spa); | |
| 750 spa_remove(spa); | |
| 751 mutex_exit(&spa_namespace_lock); | |
| 752 return (error); | |
| 753 } | |
| 754 | |
| 755 if (altroot != NULL) { | |
| 756 spa->spa_root = spa_strdup(altroot); | |
| 757 atomic_add_32(&spa_active_count, 1); | |
| 758 } | |
| 759 | |
| 760 spa->spa_dsl_pool = dp = dsl_pool_create(spa, txg); | |
| 761 spa->spa_meta_objset = dp->dp_meta_objset; | |
| 762 | |
| 763 tx = dmu_tx_create_assigned(dp, txg); | |
| 764 | |
| 765 /* | |
| 766 * Create the pool config object. | |
| 767 */ | |
| 768 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 769 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 770 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 771 | |
| 1544 | 772 if (zap_add(spa->spa_meta_objset, |
| 789 | 773 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 774 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { |
| 775 cmn_err(CE_PANIC, "failed to add pool config"); | |
| 776 } | |
| 789 | 777 |
| 778 /* | |
| 779 * Create the deferred-free bplist object. Turn off compression | |
| 780 * because sync-to-convergence takes longer if the blocksize | |
| 781 * keeps changing. | |
| 782 */ | |
| 783 spa->spa_sync_bplist_obj = bplist_create(spa->spa_meta_objset, | |
| 784 1 << 14, tx); | |
| 785 dmu_object_set_compress(spa->spa_meta_objset, spa->spa_sync_bplist_obj, | |
| 786 ZIO_COMPRESS_OFF, tx); | |
| 787 | |
| 1544 | 788 if (zap_add(spa->spa_meta_objset, |
| 789 | 789 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, |
| 1544 | 790 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj, tx) != 0) { |
| 791 cmn_err(CE_PANIC, "failed to add bplist"); | |
| 792 } | |
| 789 | 793 |
| 794 dmu_tx_commit(tx); | |
| 795 | |
| 796 spa->spa_sync_on = B_TRUE; | |
| 797 txg_sync_start(spa->spa_dsl_pool); | |
| 798 | |
| 799 /* | |
| 800 * We explicitly wait for the first transaction to complete so that our | |
| 801 * bean counters are appropriately updated. | |
| 802 */ | |
| 803 txg_wait_synced(spa->spa_dsl_pool, txg); | |
| 804 | |
| 805 spa_config_sync(); | |
| 806 | |
| 807 mutex_exit(&spa_namespace_lock); | |
| 808 | |
| 809 return (0); | |
| 810 } | |
| 811 | |
| 812 /* | |
| 813 * Import the given pool into the system. We set up the necessary spa_t and | |
| 814 * then call spa_load() to do the dirty work. | |
| 815 */ | |
| 816 int | |
| 817 spa_import(const char *pool, nvlist_t *config, char *altroot) | |
| 818 { | |
| 819 spa_t *spa; | |
| 820 int error; | |
| 821 | |
| 822 if (!(spa_mode & FWRITE)) | |
| 823 return (EROFS); | |
| 824 | |
| 825 /* | |
| 826 * If a pool with this name exists, return failure. | |
| 827 */ | |
| 828 mutex_enter(&spa_namespace_lock); | |
| 829 if (spa_lookup(pool) != NULL) { | |
| 830 mutex_exit(&spa_namespace_lock); | |
| 831 return (EEXIST); | |
| 832 } | |
| 833 | |
| 834 /* | |
| 835 * Create an initialize the spa structure | |
| 836 */ | |
| 837 spa = spa_add(pool); | |
| 838 spa_activate(spa); | |
| 839 | |
| 840 /* | |
| 841 * Pass off the heavy lifting to spa_load(). We pass TRUE for mosconfig | |
| 842 * so that we don't try to open the pool if the config is damaged. | |
| 843 */ | |
| 1544 | 844 error = spa_load(spa, config, SPA_LOAD_IMPORT, B_TRUE); |
| 789 | 845 |
| 846 if (error) { | |
| 847 spa_unload(spa); | |
| 848 spa_deactivate(spa); | |
| 849 spa_remove(spa); | |
| 850 mutex_exit(&spa_namespace_lock); | |
| 851 return (error); | |
| 852 } | |
| 853 | |
| 854 /* | |
| 855 * Set the alternate root, if there is one. | |
| 856 */ | |
| 857 if (altroot != NULL) { | |
| 858 atomic_add_32(&spa_active_count, 1); | |
| 859 spa->spa_root = spa_strdup(altroot); | |
| 860 } | |
| 861 | |
| 862 /* | |
| 863 * Initialize the config based on the in-core state. | |
| 864 */ | |
| 865 config = spa_config_generate(spa, NULL, spa_last_synced_txg(spa), 0); | |
| 866 | |
| 867 spa_config_set(spa, config); | |
| 868 | |
| 869 /* | |
| 870 * Sync the configuration cache. | |
| 871 */ | |
| 872 spa_config_sync(); | |
| 873 | |
| 874 mutex_exit(&spa_namespace_lock); | |
| 875 | |
| 876 /* | |
| 877 * Resilver anything that's out of date. | |
| 878 */ | |
| 879 if (spa_mode & FWRITE) | |
| 880 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 881 | |
| 882 return (0); | |
| 883 } | |
| 884 | |
| 885 /* | |
| 886 * This (illegal) pool name is used when temporarily importing a spa_t in order | |
| 887 * to get the vdev stats associated with the imported devices. | |
| 888 */ | |
| 889 #define TRYIMPORT_NAME "$import" | |
| 890 | |
| 891 nvlist_t * | |
| 892 spa_tryimport(nvlist_t *tryconfig) | |
| 893 { | |
| 894 nvlist_t *config = NULL; | |
| 895 char *poolname; | |
| 896 spa_t *spa; | |
| 897 uint64_t state; | |
| 898 | |
| 899 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) | |
| 900 return (NULL); | |
| 901 | |
| 902 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) | |
| 903 return (NULL); | |
| 904 | |
| 905 mutex_enter(&spa_namespace_lock); | |
| 906 spa = spa_add(TRYIMPORT_NAME); | |
| 907 | |
| 908 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); | |
| 909 | |
| 910 /* | |
| 911 * Initialize the spa_t structure. | |
| 912 */ | |
| 913 spa_activate(spa); | |
| 914 | |
| 915 /* | |
| 916 * Pass off the heavy lifting to spa_load(). We pass TRUE for mosconfig | |
| 917 * so we don't try to open the pool if the config is damaged. | |
| 918 */ | |
| 1544 | 919 (void) spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE); |
| 789 | 920 |
| 921 /* | |
| 922 * If 'tryconfig' was at least parsable, return the current config. | |
| 923 */ | |
| 924 if (spa->spa_root_vdev != NULL) { | |
| 925 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); | |
| 926 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, | |
| 927 poolname) == 0); | |
| 928 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
| 929 state) == 0); | |
| 930 } | |
| 931 | |
| 932 spa_unload(spa); | |
| 933 spa_deactivate(spa); | |
| 934 spa_remove(spa); | |
| 935 mutex_exit(&spa_namespace_lock); | |
| 936 | |
| 937 return (config); | |
| 938 } | |
| 939 | |
| 940 /* | |
| 941 * Pool export/destroy | |
| 942 * | |
| 943 * The act of destroying or exporting a pool is very simple. We make sure there | |
| 944 * is no more pending I/O and any references to the pool are gone. Then, we | |
| 945 * update the pool state and sync all the labels to disk, removing the | |
| 946 * configuration from the cache afterwards. | |
| 947 */ | |
| 948 static int | |
| 949 spa_export_common(char *pool, int new_state) | |
| 950 { | |
| 951 spa_t *spa; | |
| 952 | |
| 953 if (!(spa_mode & FWRITE)) | |
| 954 return (EROFS); | |
| 955 | |
| 956 mutex_enter(&spa_namespace_lock); | |
| 957 if ((spa = spa_lookup(pool)) == NULL) { | |
| 958 mutex_exit(&spa_namespace_lock); | |
| 959 return (ENOENT); | |
| 960 } | |
| 961 | |
| 962 /* | |
| 1544 | 963 * Put a hold on the pool, drop the namespace lock, stop async tasks, |
| 964 * reacquire the namespace lock, and see if we can export. | |
| 965 */ | |
| 966 spa_open_ref(spa, FTAG); | |
| 967 mutex_exit(&spa_namespace_lock); | |
| 968 spa_async_suspend(spa); | |
| 969 mutex_enter(&spa_namespace_lock); | |
| 970 spa_close(spa, FTAG); | |
| 971 | |
| 972 /* | |
| 789 | 973 * The pool will be in core if it's openable, |
| 974 * in which case we can modify its state. | |
| 975 */ | |
| 976 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { | |
| 977 /* | |
| 978 * Objsets may be open only because they're dirty, so we | |
| 979 * have to force it to sync before checking spa_refcnt. | |
| 980 */ | |
| 981 spa_scrub_suspend(spa); | |
| 982 txg_wait_synced(spa->spa_dsl_pool, 0); | |
| 983 | |
| 1544 | 984 /* |
| 985 * A pool cannot be exported or destroyed if there are active | |
| 986 * references. If we are resetting a pool, allow references by | |
| 987 * fault injection handlers. | |
| 988 */ | |
| 989 if (!spa_refcount_zero(spa) || | |
| 990 (spa->spa_inject_ref != 0 && | |
| 991 new_state != POOL_STATE_UNINITIALIZED)) { | |
| 789 | 992 spa_scrub_resume(spa); |
| 1544 | 993 spa_async_resume(spa); |
| 789 | 994 mutex_exit(&spa_namespace_lock); |
| 995 return (EBUSY); | |
| 996 } | |
| 997 | |
| 998 spa_scrub_resume(spa); | |
| 999 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); | |
| 1000 | |
| 1001 if (spa->spa_root != NULL) | |
| 1002 atomic_add_32(&spa_active_count, -1); | |
| 1003 | |
| 1004 /* | |
| 1005 * We want this to be reflected on every label, | |
| 1006 * so mark them all dirty. spa_unload() will do the | |
| 1007 * final sync that pushes these changes out. | |
| 1008 */ | |
| 1544 | 1009 if (new_state != POOL_STATE_UNINITIALIZED) { |
| 1010 spa->spa_state = new_state; | |
| 1011 vdev_config_dirty(spa->spa_root_vdev); | |
| 1012 } | |
| 789 | 1013 } |
| 1014 | |
| 1015 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 1016 spa_unload(spa); | |
| 1017 spa_deactivate(spa); | |
| 1018 } | |
| 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 { | |
| 1035 return (spa_export_common(pool, POOL_STATE_DESTROYED)); | |
| 1036 } | |
| 1037 | |
| 1038 /* | |
| 1039 * Export a storage pool. | |
| 1040 */ | |
| 1041 int | |
| 1042 spa_export(char *pool) | |
| 1043 { | |
| 1044 return (spa_export_common(pool, POOL_STATE_EXPORTED)); | |
| 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 { | |
| 1054 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED)); | |
| 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, c0, children, 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 | |
|
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1082 if (rvd == NULL) { /* spa_create() */ |
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1083 rvd = vd; |
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1084 c0 = 0; |
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1085 } else { |
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1086 c0 = rvd->vdev_children; |
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1087 } |
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1088 |
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1089 ASSERT(spa->spa_root_vdev == rvd); |
| 789 | 1090 |
| 1091 if ((error = vdev_create(vd, txg)) != 0) | |
| 1092 return (spa_vdev_exit(spa, vd, txg, error)); | |
| 1093 | |
|
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1094 children = vd->vdev_children; |
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1095 |
| 789 | 1096 /* |
|
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1097 * Transfer each new top-level vdev from vd to rvd. |
| 789 | 1098 */ |
|
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1099 for (c = 0; c < children; c++) { |
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1100 tvd = vd->vdev_child[c]; |
| 789 | 1101 if (vd != rvd) { |
| 1102 vdev_remove_child(vd, tvd); | |
|
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1103 tvd->vdev_id = c0 + c; |
| 789 | 1104 vdev_add_child(rvd, tvd); |
| 1105 } | |
| 1106 vdev_config_dirty(tvd); | |
| 1107 } | |
| 1108 | |
| 1109 /* | |
|
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1110 * We have to be careful when adding new vdevs to an existing pool. |
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1111 * If other threads start allocating from these vdevs before we |
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1112 * sync the config cache, and we lose power, then upon reboot we may |
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1113 * fail to open the pool because there are DVAs that the config cache |
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1114 * can't translate. Therefore, we first add the vdevs without |
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1115 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); |
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1116 * initialize the metaslabs; and sync the config cache again. |
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1117 * |
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1118 * spa_load() checks for added-but-not-initialized vdevs, so that |
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1119 * if we lose power at any point in this sequence, the remaining |
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1120 * steps will be completed the next time we load the pool. |
| 789 | 1121 */ |
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1122 if (vd != rvd) { |
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1123 (void) spa_vdev_exit(spa, vd, txg, 0); |
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1124 txg = spa_vdev_enter(spa); |
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1125 vd = NULL; |
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1126 } |
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1127 |
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1128 /* |
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1129 * Now that the config is safely on disk, we can use the new space. |
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1130 */ |
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1131 for (c = 0; c < children; c++) { |
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1132 tvd = rvd->vdev_child[c0 + c]; |
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1133 ASSERT(tvd->vdev_ms_array == 0); |
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1134 vdev_init(tvd, txg); |
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1135 vdev_config_dirty(tvd); |
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1136 } |
| 789 | 1137 |
| 1138 return (spa_vdev_exit(spa, vd, txg, 0)); | |
| 1139 } | |
| 1140 | |
| 1141 /* | |
| 1142 * Attach a device to a mirror. The arguments are the path to any device | |
| 1143 * in the mirror, and the nvroot for the new device. If the path specifies | |
| 1144 * a device that is not mirrored, we automatically insert the mirror vdev. | |
| 1145 * | |
| 1146 * If 'replacing' is specified, the new device is intended to replace the | |
| 1147 * existing device; in this case the two devices are made into their own | |
| 1148 * mirror using the 'replacing' vdev, which is functionally idendical to | |
| 1149 * the mirror vdev (it actually reuses all the same ops) but has a few | |
| 1150 * extra rules: you can't attach to it after it's been created, and upon | |
| 1151 * completion of resilvering, the first disk (the one being replaced) | |
| 1152 * is automatically detached. | |
| 1153 */ | |
| 1154 int | |
| 1544 | 1155 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) |
| 789 | 1156 { |
| 1157 uint64_t txg, open_txg; | |
| 1158 int error; | |
| 1159 vdev_t *rvd = spa->spa_root_vdev; | |
| 1160 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; | |
| 1161 vdev_ops_t *pvops = replacing ? &vdev_replacing_ops : &vdev_mirror_ops; | |
| 1162 | |
| 1163 txg = spa_vdev_enter(spa); | |
| 1164 | |
| 1544 | 1165 oldvd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1166 |
| 1167 if (oldvd == NULL) | |
| 1168 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1169 | |
|
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1170 if (!oldvd->vdev_ops->vdev_op_leaf) |
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1171 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1172 |
| 789 | 1173 pvd = oldvd->vdev_parent; |
| 1174 | |
| 1175 /* | |
| 1176 * The parent must be a mirror or the root, unless we're replacing; | |
| 1177 * in that case, the parent can be anything but another replacing vdev. | |
| 1178 */ | |
| 1179 if (pvd->vdev_ops != &vdev_mirror_ops && | |
| 1180 pvd->vdev_ops != &vdev_root_ops && | |
| 1181 (!replacing || pvd->vdev_ops == &vdev_replacing_ops)) | |
| 1182 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1183 | |
| 1184 newrootvd = spa_config_parse(spa, nvroot, NULL, 0, VDEV_ALLOC_ADD); | |
| 1185 | |
| 1186 if (newrootvd == NULL || newrootvd->vdev_children != 1) | |
| 1187 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); | |
| 1188 | |
| 1189 newvd = newrootvd->vdev_child[0]; | |
| 1190 | |
| 1191 if (!newvd->vdev_ops->vdev_op_leaf) | |
| 1192 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); | |
| 1193 | |
| 1194 if ((error = vdev_create(newrootvd, txg)) != 0) | |
| 1195 return (spa_vdev_exit(spa, newrootvd, txg, error)); | |
| 1196 | |
|
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1197 /* |
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1198 * Compare the new device size with the replaceable/attachable |
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1199 * device size. |
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1200 */ |
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1201 if (newvd->vdev_psize < vdev_get_rsize(oldvd)) |
| 789 | 1202 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); |
| 1203 | |
| 1204 if (newvd->vdev_ashift != oldvd->vdev_ashift && oldvd->vdev_ashift != 0) | |
| 1205 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); | |
| 1206 | |
| 1207 /* | |
| 1208 * If this is an in-place replacement, update oldvd's path and devid | |
| 1209 * to make it distinguishable from newvd, and unopenable from now on. | |
| 1210 */ | |
| 1211 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { | |
| 1212 spa_strfree(oldvd->vdev_path); | |
| 1213 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, | |
| 1214 KM_SLEEP); | |
| 1215 (void) sprintf(oldvd->vdev_path, "%s/%s", | |
| 1216 newvd->vdev_path, "old"); | |
| 1217 if (oldvd->vdev_devid != NULL) { | |
| 1218 spa_strfree(oldvd->vdev_devid); | |
| 1219 oldvd->vdev_devid = NULL; | |
| 1220 } | |
| 1221 } | |
| 1222 | |
| 1223 /* | |
| 1224 * If the parent is not a mirror, or if we're replacing, | |
| 1225 * insert the new mirror/replacing vdev above oldvd. | |
| 1226 */ | |
| 1227 if (pvd->vdev_ops != pvops) | |
| 1228 pvd = vdev_add_parent(oldvd, pvops); | |
| 1229 | |
| 1230 ASSERT(pvd->vdev_top->vdev_parent == rvd); | |
| 1231 ASSERT(pvd->vdev_ops == pvops); | |
| 1232 ASSERT(oldvd->vdev_parent == pvd); | |
| 1233 | |
| 1234 /* | |
| 1235 * Extract the new device from its root and add it to pvd. | |
| 1236 */ | |
| 1237 vdev_remove_child(newrootvd, newvd); | |
| 1238 newvd->vdev_id = pvd->vdev_children; | |
| 1239 vdev_add_child(pvd, newvd); | |
| 1240 | |
| 1544 | 1241 /* |
| 1242 * If newvd is smaller than oldvd, but larger than its rsize, | |
| 1243 * the addition of newvd may have decreased our parent's asize. | |
| 1244 */ | |
| 1245 pvd->vdev_asize = MIN(pvd->vdev_asize, newvd->vdev_asize); | |
| 1246 | |
| 789 | 1247 tvd = newvd->vdev_top; |
| 1248 ASSERT(pvd->vdev_top == tvd); | |
| 1249 ASSERT(tvd->vdev_parent == rvd); | |
| 1250 | |
| 1251 vdev_config_dirty(tvd); | |
| 1252 | |
| 1253 /* | |
| 1254 * Set newvd's DTL to [TXG_INITIAL, open_txg]. It will propagate | |
| 1255 * upward when spa_vdev_exit() calls vdev_dtl_reassess(). | |
| 1256 */ | |
| 1257 open_txg = txg + TXG_CONCURRENT_STATES - 1; | |
| 1258 | |
| 1259 mutex_enter(&newvd->vdev_dtl_lock); | |
| 1260 space_map_add(&newvd->vdev_dtl_map, TXG_INITIAL, | |
| 1261 open_txg - TXG_INITIAL + 1); | |
| 1262 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1263 | |
| 1544 | 1264 dprintf("attached %s in txg %llu\n", newvd->vdev_path, txg); |
| 1265 | |
| 789 | 1266 /* |
| 1267 * Mark newvd's DTL dirty in this txg. | |
| 1268 */ | |
| 1269 vdev_dirty(tvd, VDD_DTL, txg); | |
| 1270 (void) txg_list_add(&tvd->vdev_dtl_list, newvd, txg); | |
| 1271 | |
| 1272 (void) spa_vdev_exit(spa, newrootvd, open_txg, 0); | |
| 1273 | |
| 1274 /* | |
| 1275 * Kick off a resilver to update newvd. | |
| 1276 */ | |
| 1277 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1278 | |
| 1279 return (0); | |
| 1280 } | |
| 1281 | |
| 1282 /* | |
| 1283 * Detach a device from a mirror or replacing vdev. | |
| 1284 * If 'replace_done' is specified, only detach if the parent | |
| 1285 * is a replacing vdev. | |
| 1286 */ | |
| 1287 int | |
| 1544 | 1288 spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) |
| 789 | 1289 { |
| 1290 uint64_t txg; | |
| 1291 int c, t, error; | |
| 1292 vdev_t *rvd = spa->spa_root_vdev; | |
| 1293 vdev_t *vd, *pvd, *cvd, *tvd; | |
| 1294 | |
| 1295 txg = spa_vdev_enter(spa); | |
| 1296 | |
| 1544 | 1297 vd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1298 |
| 1299 if (vd == NULL) | |
| 1300 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1301 | |
|
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1302 if (!vd->vdev_ops->vdev_op_leaf) |
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1303 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1304 |
| 789 | 1305 pvd = vd->vdev_parent; |
| 1306 | |
| 1307 /* | |
| 1308 * If replace_done is specified, only remove this device if it's | |
| 1309 * the first child of a replacing vdev. | |
| 1310 */ | |
| 1311 if (replace_done && | |
| 1312 (vd->vdev_id != 0 || pvd->vdev_ops != &vdev_replacing_ops)) | |
| 1313 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1314 | |
| 1315 /* | |
| 1316 * Only mirror and replacing vdevs support detach. | |
| 1317 */ | |
| 1318 if (pvd->vdev_ops != &vdev_replacing_ops && | |
| 1319 pvd->vdev_ops != &vdev_mirror_ops) | |
| 1320 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1321 | |
| 1322 /* | |
| 1323 * If there's only one replica, you can't detach it. | |
| 1324 */ | |
| 1325 if (pvd->vdev_children <= 1) | |
| 1326 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
| 1327 | |
| 1328 /* | |
| 1329 * If all siblings have non-empty DTLs, this device may have the only | |
| 1330 * valid copy of the data, which means we cannot safely detach it. | |
| 1331 * | |
| 1332 * XXX -- as in the vdev_offline() case, we really want a more | |
| 1333 * precise DTL check. | |
| 1334 */ | |
| 1335 for (c = 0; c < pvd->vdev_children; c++) { | |
| 1336 uint64_t dirty; | |
| 1337 | |
| 1338 cvd = pvd->vdev_child[c]; | |
| 1339 if (cvd == vd) | |
| 1340 continue; | |
| 1341 if (vdev_is_dead(cvd)) | |
| 1342 continue; | |
| 1343 mutex_enter(&cvd->vdev_dtl_lock); | |
| 1344 dirty = cvd->vdev_dtl_map.sm_space | | |
| 1345 cvd->vdev_dtl_scrub.sm_space; | |
| 1346 mutex_exit(&cvd->vdev_dtl_lock); | |
| 1347 if (!dirty) | |
| 1348 break; | |
| 1349 } | |
| 1350 if (c == pvd->vdev_children) | |
| 1351 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
| 1352 | |
| 1353 /* | |
| 1354 * Erase the disk labels so the disk can be used for other things. | |
| 1355 * This must be done after all other error cases are handled, | |
| 1356 * but before we disembowel vd (so we can still do I/O to it). | |
| 1357 * But if we can't do it, don't treat the error as fatal -- | |
| 1358 * it may be that the unwritability of the disk is the reason | |
| 1359 * it's being detached! | |
| 1360 */ | |
| 1361 error = vdev_label_init(vd, 0); | |
| 1362 if (error) | |
| 1363 dprintf("unable to erase labels on %s\n", vdev_description(vd)); | |
| 1364 | |
| 1365 /* | |
| 1366 * Remove vd from its parent and compact the parent's children. | |
| 1367 */ | |
| 1368 vdev_remove_child(pvd, vd); | |
| 1369 vdev_compact_children(pvd); | |
| 1370 | |
| 1371 /* | |
| 1372 * Remember one of the remaining children so we can get tvd below. | |
| 1373 */ | |
| 1374 cvd = pvd->vdev_child[0]; | |
| 1375 | |
| 1376 /* | |
| 1377 * If the parent mirror/replacing vdev only has one child, | |
| 1378 * the parent is no longer needed. Remove it from the tree. | |
| 1379 */ | |
| 1380 if (pvd->vdev_children == 1) | |
| 1381 vdev_remove_parent(cvd); | |
| 1382 | |
| 1383 /* | |
| 1384 * We don't set tvd until now because the parent we just removed | |
| 1385 * may have been the previous top-level vdev. | |
| 1386 */ | |
| 1387 tvd = cvd->vdev_top; | |
| 1388 ASSERT(tvd->vdev_parent == rvd); | |
| 1389 | |
| 1390 /* | |
| 1391 * Reopen this top-level vdev to reassess health after detach. | |
| 1392 */ | |
| 1544 | 1393 vdev_reopen(tvd); |
| 789 | 1394 |
| 1395 /* | |
| 1396 * If the device we just detached was smaller than the others, | |
| 1544 | 1397 * it may be possible to add metaslabs (i.e. grow the pool). We ignore |
| 1398 * the error here because the detach still succeeded - we just weren't | |
| 1399 * able to reinitialize the metaslabs. This pool is in for a world of | |
| 1400 * hurt, in any case. | |
| 789 | 1401 */ |
| 1544 | 1402 (void) vdev_metaslab_init(tvd, txg); |
| 789 | 1403 |
| 1404 vdev_config_dirty(tvd); | |
| 1405 | |
| 1406 /* | |
| 1407 * Mark vd's DTL as dirty in this txg. | |
| 1408 * vdev_dtl_sync() will see that vd->vdev_detached is set | |
| 1409 * and free vd's DTL object in syncing context. | |
| 1410 * But first make sure we're not on any *other* txg's DTL list, | |
| 1411 * to prevent vd from being accessed after it's freed. | |
| 1412 */ | |
| 1413 vdev_dirty(tvd, VDD_DTL, txg); | |
| 1414 vd->vdev_detached = B_TRUE; | |
| 1415 for (t = 0; t < TXG_SIZE; t++) | |
| 1416 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); | |
| 1417 (void) txg_list_add(&tvd->vdev_dtl_list, vd, txg); | |
| 1418 | |
| 1544 | 1419 dprintf("detached %s in txg %llu\n", vd->vdev_path, txg); |
| 789 | 1420 |
| 1421 return (spa_vdev_exit(spa, vd, txg, 0)); | |
| 1422 } | |
| 1423 | |
| 1424 /* | |
| 1544 | 1425 * Find any device that's done replacing, so we can detach it. |
| 789 | 1426 */ |
| 1544 | 1427 static vdev_t * |
| 1428 spa_vdev_replace_done_hunt(vdev_t *vd) | |
| 789 | 1429 { |
| 1544 | 1430 vdev_t *newvd, *oldvd; |
| 789 | 1431 int c; |
| 1432 | |
| 1544 | 1433 for (c = 0; c < vd->vdev_children; c++) { |
| 1434 oldvd = spa_vdev_replace_done_hunt(vd->vdev_child[c]); | |
| 1435 if (oldvd != NULL) | |
| 1436 return (oldvd); | |
| 1437 } | |
| 789 | 1438 |
| 1439 if (vd->vdev_ops == &vdev_replacing_ops && vd->vdev_children == 2) { | |
| 1544 | 1440 oldvd = vd->vdev_child[0]; |
| 1441 newvd = vd->vdev_child[1]; | |
| 789 | 1442 |
| 1544 | 1443 mutex_enter(&newvd->vdev_dtl_lock); |
| 1444 if (newvd->vdev_dtl_map.sm_space == 0 && | |
| 1445 newvd->vdev_dtl_scrub.sm_space == 0) { | |
| 1446 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1447 return (oldvd); | |
| 1448 } | |
| 1449 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1450 } | |
| 789 | 1451 |
| 1544 | 1452 return (NULL); |
| 789 | 1453 } |
| 1454 | |
| 1544 | 1455 static void |
| 789 | 1456 spa_vdev_replace_done(spa_t *spa) |
| 1457 { | |
| 1544 | 1458 vdev_t *vd; |
| 1459 uint64_t guid; | |
| 789 | 1460 |
| 1544 | 1461 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 1462 |
| 1544 | 1463 while ((vd = spa_vdev_replace_done_hunt(spa->spa_root_vdev)) != NULL) { |
| 1464 guid = vd->vdev_guid; | |
| 1465 spa_config_exit(spa, FTAG); | |
| 1466 if (spa_vdev_detach(spa, guid, B_TRUE) != 0) | |
| 1467 return; | |
| 1468 spa_config_enter(spa, RW_READER, FTAG); | |
| 789 | 1469 } |
| 1470 | |
| 1544 | 1471 spa_config_exit(spa, FTAG); |
| 789 | 1472 } |
| 1473 | |
| 1474 /* | |
|
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1475 * Update the stored path for this vdev. Dirty the vdev configuration, relying |
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1476 * on spa_vdev_enter/exit() to synchronize the labels and cache. |
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1477 */ |
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1478 int |
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1479 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) |
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1480 { |
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1481 vdev_t *rvd, *vd; |
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1482 uint64_t txg; |
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1483 |
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1484 rvd = spa->spa_root_vdev; |
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1485 |
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1486 txg = spa_vdev_enter(spa); |
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1487 |
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1488 if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) |
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1489 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); |
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1490 |
|
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1491 if (!vd->vdev_ops->vdev_op_leaf) |
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1492 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1493 |
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1494 spa_strfree(vd->vdev_path); |
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1495 vd->vdev_path = spa_strdup(newpath); |
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1496 |
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1497 vdev_config_dirty(vd->vdev_top); |
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1498 |
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1499 return (spa_vdev_exit(spa, NULL, txg, 0)); |
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1500 } |
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1501 |
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1502 /* |
| 789 | 1503 * ========================================================================== |
| 1504 * SPA Scrubbing | |
| 1505 * ========================================================================== | |
| 1506 */ | |
| 1507 | |
| 1544 | 1508 void |
| 1509 spa_scrub_throttle(spa_t *spa, int direction) | |
| 1510 { | |
| 1511 mutex_enter(&spa->spa_scrub_lock); | |
| 1512 spa->spa_scrub_throttled += direction; | |
| 1513 ASSERT(spa->spa_scrub_throttled >= 0); | |
| 1514 if (spa->spa_scrub_throttled == 0) | |
| 1515 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 1516 mutex_exit(&spa->spa_scrub_lock); | |
| 1517 } | |
| 789 | 1518 |
| 1519 static void | |
| 1520 spa_scrub_io_done(zio_t *zio) | |
| 1521 { | |
| 1522 spa_t *spa = zio->io_spa; | |
| 1523 | |
| 1524 zio_buf_free(zio->io_data, zio->io_size); | |
| 1525 | |
| 1526 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 1527 if (zio->io_error && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { |
| 1528 vdev_t *vd = zio->io_vd; | |
| 789 | 1529 spa->spa_scrub_errors++; |
| 1530 mutex_enter(&vd->vdev_stat_lock); | |
| 1531 vd->vdev_stat.vs_scrub_errors++; | |
| 1532 mutex_exit(&vd->vdev_stat_lock); | |
| 1533 } | |
| 1544 | 1534 if (--spa->spa_scrub_inflight == 0) { |
| 1535 cv_broadcast(&spa->spa_scrub_io_cv); | |
| 1536 ASSERT(spa->spa_scrub_throttled == 0); | |
| 1537 } | |
| 1538 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 1539 } |
| 1540 | |
| 1541 static void | |
| 1544 | 1542 spa_scrub_io_start(spa_t *spa, blkptr_t *bp, int priority, int flags, |
| 1543 zbookmark_t *zb) | |
| 789 | 1544 { |
| 1545 size_t size = BP_GET_LSIZE(bp); | |
| 1546 void *data = zio_buf_alloc(size); | |
| 1547 | |
| 1548 mutex_enter(&spa->spa_scrub_lock); | |
| 1549 spa->spa_scrub_inflight++; | |
| 1550 mutex_exit(&spa->spa_scrub_lock); | |
| 1551 | |
| 1544 | 1552 if (zb->zb_level == -1 && BP_GET_TYPE(bp) != DMU_OT_OBJSET) |
| 1553 flags |= ZIO_FLAG_SPECULATIVE; /* intent log block */ | |
| 1554 | |
| 1555 flags |= ZIO_FLAG_CANFAIL; | |
| 1556 | |
| 789 | 1557 zio_nowait(zio_read(NULL, spa, bp, data, size, |
| 1544 | 1558 spa_scrub_io_done, NULL, priority, flags, zb)); |
| 789 | 1559 } |
| 1560 | |
| 1561 /* ARGSUSED */ | |
| 1562 static int | |
| 1563 spa_scrub_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a) | |
| 1564 { | |
| 1565 blkptr_t *bp = &bc->bc_blkptr; | |
| 1566 vdev_t *vd = vdev_lookup_top(spa, DVA_GET_VDEV(&bp->blk_dva[0])); | |
| 1567 | |
| 1568 if (bc->bc_errno || vd == NULL) { | |
| 1569 /* | |
| 1570 * We can't scrub this block, but we can continue to scrub | |
| 1571 * the rest of the pool. Note the error and move along. | |
| 1572 */ | |
| 1573 mutex_enter(&spa->spa_scrub_lock); | |
| 1574 spa->spa_scrub_errors++; | |
| 1575 mutex_exit(&spa->spa_scrub_lock); | |
| 1576 | |
| 1577 if (vd != NULL) { | |
| 1578 mutex_enter(&vd->vdev_stat_lock); | |
| 1579 vd->vdev_stat.vs_scrub_errors++; | |
| 1580 mutex_exit(&vd->vdev_stat_lock); | |
| 1581 } | |
| 1582 | |
| 1583 return (ERESTART); | |
| 1584 } | |
| 1585 | |
| 1586 ASSERT(bp->blk_birth < spa->spa_scrub_maxtxg); | |
| 1587 | |
| 1588 /* | |
| 1589 * Keep track of how much data we've examined so that | |
| 1590 * zpool(1M) status can make useful progress reports. | |
| 1591 */ | |
| 1592 mutex_enter(&vd->vdev_stat_lock); | |
| 1593 vd->vdev_stat.vs_scrub_examined += BP_GET_ASIZE(bp); | |
| 1594 mutex_exit(&vd->vdev_stat_lock); | |
| 1595 | |
| 1596 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER) { | |
| 1597 if (DVA_GET_GANG(&bp->blk_dva[0])) { | |
| 1598 /* | |
| 1599 * Gang members may be spread across multiple vdevs, | |
| 1600 * so the best we can do is look at the pool-wide DTL. | |
| 1601 * XXX -- it would be better to change our allocation | |
| 1602 * policy to ensure that this can't happen. | |
| 1603 */ | |
| 1604 vd = spa->spa_root_vdev; | |
| 1605 } | |
| 1606 if (vdev_dtl_contains(&vd->vdev_dtl_map, bp->blk_birth, 1)) { | |
| 1607 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_RESILVER, | |
| 1544 | 1608 ZIO_FLAG_RESILVER, &bc->bc_bookmark); |
| 789 | 1609 } |
| 1610 } else { | |
| 1611 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_SCRUB, | |
| 1544 | 1612 ZIO_FLAG_SCRUB, &bc->bc_bookmark); |
| 789 | 1613 } |
| 1614 | |
| 1615 return (0); | |
| 1616 } | |
| 1617 | |
| 1618 static void | |
| 1619 spa_scrub_thread(spa_t *spa) | |
| 1620 { | |
| 1621 callb_cpr_t cprinfo; | |
| 1622 traverse_handle_t *th = spa->spa_scrub_th; | |
| 1623 vdev_t *rvd = spa->spa_root_vdev; | |
| 1624 pool_scrub_type_t scrub_type = spa->spa_scrub_type; | |
| 1625 int error = 0; | |
| 1626 boolean_t complete; | |
| 1627 | |
| 1628 CALLB_CPR_INIT(&cprinfo, &spa->spa_scrub_lock, callb_generic_cpr, FTAG); | |
| 1629 | |
|
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1630 /* |
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1631 * If we're restarting due to a snapshot create/delete, |
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1632 * wait for that to complete. |
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1633 */ |
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1634 txg_wait_synced(spa_get_dsl(spa), 0); |
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|
1635 |
| 1544 | 1636 dprintf("start %s mintxg=%llu maxtxg=%llu\n", |
| 1637 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 1638 spa->spa_scrub_mintxg, spa->spa_scrub_maxtxg); | |
| 1639 | |
| 1640 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1641 vdev_reopen(rvd); /* purge all vdev caches */ | |
| 789 | 1642 vdev_config_dirty(rvd); /* rewrite all disk labels */ |
| 1643 vdev_scrub_stat_update(rvd, scrub_type, B_FALSE); | |
| 1544 | 1644 spa_config_exit(spa, FTAG); |
| 789 | 1645 |
| 1646 mutex_enter(&spa->spa_scrub_lock); | |
| 1647 spa->spa_scrub_errors = 0; | |
| 1648 spa->spa_scrub_active = 1; | |
| 1544 | 1649 ASSERT(spa->spa_scrub_inflight == 0); |
| 1650 ASSERT(spa->spa_scrub_throttled == 0); | |
| 789 | 1651 |
| 1652 while (!spa->spa_scrub_stop) { | |
| 1653 CALLB_CPR_SAFE_BEGIN(&cprinfo); | |
| 1544 | 1654 while (spa->spa_scrub_suspended) { |
| 789 | 1655 spa->spa_scrub_active = 0; |
| 1656 cv_broadcast(&spa->spa_scrub_cv); | |
| 1657 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 1658 spa->spa_scrub_active = 1; | |
| 1659 } | |
| 1660 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_scrub_lock); | |
| 1661 | |
| 1662 if (spa->spa_scrub_restart_txg != 0) | |
| 1663 break; | |
| 1664 | |
| 1665 mutex_exit(&spa->spa_scrub_lock); | |
| 1666 error = traverse_more(th); | |
| 1667 mutex_enter(&spa->spa_scrub_lock); | |
| 1668 if (error != EAGAIN) | |
| 1669 break; | |
| 1544 | 1670 |
| 1671 while (spa->spa_scrub_throttled > 0) | |
| 1672 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 789 | 1673 } |
| 1674 | |
| 1675 while (spa->spa_scrub_inflight) | |
| 1676 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 1677 | |
| 1678 if (spa->spa_scrub_restart_txg != 0) | |
| 1679 error = ERESTART; | |
| 1680 | |
| 1544 | 1681 if (spa->spa_scrub_stop) |
| 1682 error = EINTR; | |
| 1683 | |
| 789 | 1684 spa->spa_scrub_active = 0; |
| 1685 cv_broadcast(&spa->spa_scrub_cv); | |
| 1686 | |
| 1687 /* | |
| 1544 | 1688 * Even if there were uncorrectable errors, we consider the scrub |
| 1689 * completed. The downside is that if there is a transient error during | |
| 1690 * a resilver, we won't resilver the data properly to the target. But | |
| 1691 * if the damage is permanent (more likely) we will resilver forever, | |
| 1692 * which isn't really acceptable. Since there is enough information for | |
| 1693 * the user to know what has failed and why, this seems like a more | |
| 1694 * tractable approach. | |
| 789 | 1695 */ |
| 1544 | 1696 complete = (error == 0); |
| 789 | 1697 |
| 1544 | 1698 dprintf("end %s to maxtxg=%llu %s, traverse=%d, %llu errors, stop=%u\n", |
| 1699 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 789 | 1700 spa->spa_scrub_maxtxg, complete ? "done" : "FAILED", |
| 1701 error, spa->spa_scrub_errors, spa->spa_scrub_stop); | |
| 1702 | |
| 1703 mutex_exit(&spa->spa_scrub_lock); | |
| 1704 | |
| 1705 /* | |
| 1706 * If the scrub/resilver completed, update all DTLs to reflect this. | |
| 1707 * Whether it succeeded or not, vacate all temporary scrub DTLs. | |
| 1708 */ | |
| 1544 | 1709 spa_config_enter(spa, RW_WRITER, FTAG); |
| 789 | 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); |
| 1714 spa_config_exit(spa, FTAG); | |
| 789 | 1715 |
| 1716 mutex_enter(&spa->spa_scrub_lock); | |
| 1717 | |
| 1544 | 1718 /* |
| 1719 * We may have finished replacing a device. | |
| 1720 * Let the async thread assess this and handle the detach. | |
| 1721 */ | |
| 1722 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); | |
| 789 | 1723 |
| 1724 /* | |
| 1725 * If we were told to restart, our final act is to start a new scrub. | |
| 1726 */ | |
| 1727 if (error == ERESTART) | |
| 1544 | 1728 spa_async_request(spa, scrub_type == POOL_SCRUB_RESILVER ? |
| 1729 SPA_ASYNC_RESILVER : SPA_ASYNC_SCRUB); | |
| 789 | 1730 |
| 1544 | 1731 spa->spa_scrub_type = POOL_SCRUB_NONE; |
| 1732 spa->spa_scrub_active = 0; | |
| 1733 spa->spa_scrub_thread = NULL; | |
| 1734 cv_broadcast(&spa->spa_scrub_cv); | |
| 789 | 1735 CALLB_CPR_EXIT(&cprinfo); /* drops &spa->spa_scrub_lock */ |
| 1736 thread_exit(); | |
| 1737 } | |
| 1738 | |
| 1739 void | |
| 1740 spa_scrub_suspend(spa_t *spa) | |
| 1741 { | |
| 1742 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 1743 spa->spa_scrub_suspended++; |
| 789 | 1744 while (spa->spa_scrub_active) { |
| 1745 cv_broadcast(&spa->spa_scrub_cv); | |
| 1746 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 1747 } | |
| 1748 while (spa->spa_scrub_inflight) | |
| 1749 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 1750 mutex_exit(&spa->spa_scrub_lock); | |
| 1751 } | |
| 1752 | |
| 1753 void | |
| 1754 spa_scrub_resume(spa_t *spa) | |
| 1755 { | |
| 1756 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 1757 ASSERT(spa->spa_scrub_suspended != 0); |
| 1758 if (--spa->spa_scrub_suspended == 0) | |
| 789 | 1759 cv_broadcast(&spa->spa_scrub_cv); |
| 1760 mutex_exit(&spa->spa_scrub_lock); | |
| 1761 } | |
| 1762 | |
| 1763 void | |
| 1764 spa_scrub_restart(spa_t *spa, uint64_t txg) | |
| 1765 { | |
| 1766 /* | |
| 1767 * Something happened (e.g. snapshot create/delete) that means | |
| 1768 * we must restart any in-progress scrubs. The itinerary will | |
| 1769 * fix this properly. | |
| 1770 */ | |
| 1771 mutex_enter(&spa->spa_scrub_lock); | |
| 1772 spa->spa_scrub_restart_txg = txg; | |
| 1773 mutex_exit(&spa->spa_scrub_lock); | |
| 1774 } | |
| 1775 | |
| 1544 | 1776 int |
| 1777 spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force) | |
| 789 | 1778 { |
| 1779 space_seg_t *ss; | |
| 1780 uint64_t mintxg, maxtxg; | |
| 1781 vdev_t *rvd = spa->spa_root_vdev; | |
| 1544 | 1782 int advance = ADVANCE_PRE | ADVANCE_ZIL; |
| 789 | 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. | |
| 1829 * If this is a resilver, there's nothing to do. | |
| 1830 */ | |
| 1831 if (type == POOL_SCRUB_RESILVER) | |
| 1832 type = POOL_SCRUB_NONE; | |
| 1833 } else { | |
| 1834 /* | |
| 1835 * The pool-wide DTL is non-empty. | |
| 1836 * If this is a normal scrub, upgrade to a resilver instead. | |
| 1837 */ | |
| 1838 if (type == POOL_SCRUB_EVERYTHING) | |
| 1839 type = POOL_SCRUB_RESILVER; | |
| 1840 } | |
| 789 | 1841 |
| 1544 | 1842 if (type == POOL_SCRUB_RESILVER) { |
| 789 | 1843 /* |
| 1844 * Determine the resilvering boundaries. | |
| 1845 * | |
| 1846 * Note: (mintxg, maxtxg) is an open interval, | |
| 1847 * i.e. mintxg and maxtxg themselves are not included. | |
| 1848 * | |
| 1849 * Note: for maxtxg, we MIN with spa_last_synced_txg(spa) + 1 | |
| 1850 * so we don't claim to resilver a txg that's still changing. | |
| 1851 */ | |
| 1852 ss = avl_first(&rvd->vdev_dtl_map.sm_root); | |
| 1544 | 1853 mintxg = ss->ss_start - 1; |
| 789 | 1854 ss = avl_last(&rvd->vdev_dtl_map.sm_root); |
| 1544 | 1855 maxtxg = MIN(ss->ss_end, maxtxg); |
| 789 | 1856 |
| 1544 | 1857 advance |= ADVANCE_PRUNE; |
| 789 | 1858 } |
| 1859 | |
| 1544 | 1860 mutex_exit(&rvd->vdev_dtl_lock); |
| 1861 | |
| 1862 spa->spa_scrub_stop = 0; | |
| 1863 spa->spa_scrub_type = type; | |
| 1864 spa->spa_scrub_restart_txg = 0; | |
| 1865 | |
| 1866 if (type != POOL_SCRUB_NONE) { | |
| 1867 spa->spa_scrub_mintxg = mintxg; | |
| 789 | 1868 spa->spa_scrub_maxtxg = maxtxg; |
| 1869 spa->spa_scrub_th = traverse_init(spa, spa_scrub_cb, NULL, | |
| 1870 advance, ZIO_FLAG_CANFAIL); | |
| 1871 traverse_add_pool(spa->spa_scrub_th, mintxg, maxtxg); | |
| 1872 spa->spa_scrub_thread = thread_create(NULL, 0, | |
| 1873 spa_scrub_thread, spa, 0, &p0, TS_RUN, minclsyspri); | |
| 1874 } | |
| 1875 | |
| 1544 | 1876 mutex_exit(&spa->spa_scrub_lock); |
| 1877 | |
| 789 | 1878 return (0); |
| 1879 } | |
| 1880 | |
| 1544 | 1881 /* |
| 1882 * ========================================================================== | |
| 1883 * SPA async task processing | |
| 1884 * ========================================================================== | |
| 1885 */ | |
| 1886 | |
| 1887 static void | |
| 1888 spa_async_reopen(spa_t *spa) | |
| 789 | 1889 { |
| 1544 | 1890 vdev_t *rvd = spa->spa_root_vdev; |
| 1891 vdev_t *tvd; | |
| 1892 int c; | |
| 1893 | |
| 1894 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1895 | |
| 1896 for (c = 0; c < rvd->vdev_children; c++) { | |
| 1897 tvd = rvd->vdev_child[c]; | |
| 1898 if (tvd->vdev_reopen_wanted) { | |
| 1899 tvd->vdev_reopen_wanted = 0; | |
| 1900 vdev_reopen(tvd); | |
| 1901 } | |
| 1902 } | |
| 789 | 1903 |
| 1544 | 1904 spa_config_exit(spa, FTAG); |
| 1905 } | |
| 1906 | |
| 1907 static void | |
| 1908 spa_async_thread(spa_t *spa) | |
| 1909 { | |
| 1910 int tasks; | |
| 1911 | |
| 1912 ASSERT(spa->spa_sync_on); | |
| 789 | 1913 |
| 1544 | 1914 mutex_enter(&spa->spa_async_lock); |
| 1915 tasks = spa->spa_async_tasks; | |
| 1916 spa->spa_async_tasks = 0; | |
| 1917 mutex_exit(&spa->spa_async_lock); | |
| 1918 | |
| 1919 /* | |
| 1920 * See if any devices need to be reopened. | |
| 1921 */ | |
| 1922 if (tasks & SPA_ASYNC_REOPEN) | |
| 1923 spa_async_reopen(spa); | |
| 1924 | |
| 1925 /* | |
| 1926 * If any devices are done replacing, detach them. | |
| 1927 */ | |
| 1928 if (tasks & SPA_ASYNC_REPLACE_DONE) | |
| 789 | 1929 spa_vdev_replace_done(spa); |
| 1930 | |
| 1544 | 1931 /* |
| 1932 * Kick off a scrub. | |
| 1933 */ | |
| 1934 if (tasks & SPA_ASYNC_SCRUB) | |
| 1935 VERIFY(spa_scrub(spa, POOL_SCRUB_EVERYTHING, B_TRUE) == 0); | |
| 1936 | |
| 1937 /* | |
| 1938 * Kick off a resilver. | |
| 1939 */ | |
| 1940 if (tasks & SPA_ASYNC_RESILVER) | |
| 1941 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1942 | |
| 1943 /* | |
| 1944 * Let the world know that we're done. | |
| 1945 */ | |
| 1946 mutex_enter(&spa->spa_async_lock); | |
| 1947 spa->spa_async_thread = NULL; | |
| 1948 cv_broadcast(&spa->spa_async_cv); | |
| 1949 mutex_exit(&spa->spa_async_lock); | |
| 1950 thread_exit(); | |
| 1951 } | |
| 1952 | |
| 1953 void | |
| 1954 spa_async_suspend(spa_t *spa) | |
| 1955 { | |
| 1956 mutex_enter(&spa->spa_async_lock); | |
| 1957 spa->spa_async_suspended++; | |
| 1958 while (spa->spa_async_thread != NULL) | |
| 1959 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); | |
| 1960 mutex_exit(&spa->spa_async_lock); | |
| 1961 } | |
| 1962 | |
| 1963 void | |
| 1964 spa_async_resume(spa_t *spa) | |
| 1965 { | |
| 1966 mutex_enter(&spa->spa_async_lock); | |
| 1967 ASSERT(spa->spa_async_suspended != 0); | |
| 1968 spa->spa_async_suspended--; | |
| 1969 mutex_exit(&spa->spa_async_lock); | |
| 1970 } | |
| 1971 | |
| 1972 static void | |
| 1973 spa_async_dispatch(spa_t *spa) | |
| 1974 { | |
| 1975 mutex_enter(&spa->spa_async_lock); | |
| 1976 if (spa->spa_async_tasks && !spa->spa_async_suspended && | |
| 1977 spa->spa_async_thread == NULL) | |
| 1978 spa->spa_async_thread = thread_create(NULL, 0, | |
| 1979 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); | |
| 1980 mutex_exit(&spa->spa_async_lock); | |
| 1981 } | |
| 1982 | |
| 1983 void | |
| 1984 spa_async_request(spa_t *spa, int task) | |
| 1985 { | |
| 1986 mutex_enter(&spa->spa_async_lock); | |
| 1987 spa->spa_async_tasks |= task; | |
| 1988 mutex_exit(&spa->spa_async_lock); | |
| 789 | 1989 } |
| 1990 | |
| 1991 /* | |
| 1992 * ========================================================================== | |
| 1993 * SPA syncing routines | |
| 1994 * ========================================================================== | |
| 1995 */ | |
| 1996 | |
| 1997 static void | |
| 1998 spa_sync_deferred_frees(spa_t *spa, uint64_t txg) | |
| 1999 { | |
| 2000 bplist_t *bpl = &spa->spa_sync_bplist; | |
| 2001 dmu_tx_t *tx; | |
| 2002 blkptr_t blk; | |
| 2003 uint64_t itor = 0; | |
| 2004 zio_t *zio; | |
| 2005 int error; | |
| 2006 uint8_t c = 1; | |
| 2007 | |
| 2008 zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CONFIG_HELD); | |
| 2009 | |
| 2010 while (bplist_iterate(bpl, &itor, &blk) == 0) | |
| 2011 zio_nowait(zio_free(zio, spa, txg, &blk, NULL, NULL)); | |
| 2012 | |
| 2013 error = zio_wait(zio); | |
| 2014 ASSERT3U(error, ==, 0); | |
| 2015 | |
| 2016 tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
| 2017 bplist_vacate(bpl, tx); | |
| 2018 | |
| 2019 /* | |
| 2020 * Pre-dirty the first block so we sync to convergence faster. | |
| 2021 * (Usually only the first block is needed.) | |
| 2022 */ | |
| 2023 dmu_write(spa->spa_meta_objset, spa->spa_sync_bplist_obj, 0, 1, &c, tx); | |
| 2024 dmu_tx_commit(tx); | |
| 2025 } | |
| 2026 | |
| 2027 static void | |
| 2028 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) | |
| 2029 { | |
| 2030 nvlist_t *config; | |
| 2031 char *packed = NULL; | |
| 2032 size_t nvsize = 0; | |
| 2033 dmu_buf_t *db; | |
| 2034 | |
| 2035 if (list_is_empty(&spa->spa_dirty_list)) | |
| 2036 return; | |
| 2037 | |
| 2038 config = spa_config_generate(spa, NULL, dmu_tx_get_txg(tx), B_FALSE); | |
| 2039 | |
| 2040 spa_config_set(spa, config); | |
| 2041 | |
| 2042 VERIFY(nvlist_size(config, &nvsize, NV_ENCODE_XDR) == 0); | |
| 2043 | |
| 2044 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 2045 | |
| 1544 | 2046 VERIFY(nvlist_pack(config, &packed, &nvsize, NV_ENCODE_XDR, |
| 2047 KM_SLEEP) == 0); | |
| 789 | 2048 |
| 2049 dmu_write(spa->spa_meta_objset, spa->spa_config_object, 0, nvsize, | |
| 2050 packed, tx); | |
| 2051 | |
| 2052 kmem_free(packed, nvsize); | |
| 2053 | |
| 1544 | 2054 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, |
| 2055 spa->spa_config_object, FTAG, &db)); | |
| 789 | 2056 dmu_buf_will_dirty(db, tx); |
| 2057 *(uint64_t *)db->db_data = nvsize; | |
| 1544 | 2058 dmu_buf_rele(db, FTAG); |
| 789 | 2059 } |
| 2060 | |
| 2061 /* | |
| 2062 * Sync the specified transaction group. New blocks may be dirtied as | |
| 2063 * part of the process, so we iterate until it converges. | |
| 2064 */ | |
| 2065 void | |
| 2066 spa_sync(spa_t *spa, uint64_t txg) | |
| 2067 { | |
| 2068 dsl_pool_t *dp = spa->spa_dsl_pool; | |
| 2069 objset_t *mos = spa->spa_meta_objset; | |
| 2070 bplist_t *bpl = &spa->spa_sync_bplist; | |
| 2071 vdev_t *vd; | |
| 2072 dmu_tx_t *tx; | |
| 2073 int dirty_vdevs; | |
| 2074 | |
| 2075 /* | |
| 2076 * Lock out configuration changes. | |
| 2077 */ | |
| 1544 | 2078 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2079 |
| 2080 spa->spa_syncing_txg = txg; | |
| 2081 spa->spa_sync_pass = 0; | |
| 2082 | |
| 1544 | 2083 VERIFY(0 == bplist_open(bpl, mos, spa->spa_sync_bplist_obj)); |
| 789 | 2084 |
| 2085 /* | |
| 2086 * If anything has changed in this txg, push the deferred frees | |
| 2087 * from the previous txg. If not, leave them alone so that we | |
| 2088 * don't generate work on an otherwise idle system. | |
| 2089 */ | |
| 2090 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || | |
| 2091 !txg_list_empty(&dp->dp_dirty_dirs, txg)) | |
| 2092 spa_sync_deferred_frees(spa, txg); | |
| 2093 | |
| 2094 /* | |
| 2095 * Iterate to convergence. | |
| 2096 */ | |
| 2097 do { | |
| 2098 spa->spa_sync_pass++; | |
| 2099 | |
| 2100 tx = dmu_tx_create_assigned(dp, txg); | |
| 2101 spa_sync_config_object(spa, tx); | |
| 2102 dmu_tx_commit(tx); | |
| 2103 | |
| 1544 | 2104 spa_errlog_sync(spa, txg); |
| 2105 | |
| 789 | 2106 dsl_pool_sync(dp, txg); |
| 2107 | |
| 2108 dirty_vdevs = 0; | |
| 2109 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) { | |
| 2110 vdev_sync(vd, txg); | |
| 2111 dirty_vdevs++; | |
| 2112 } | |
| 2113 | |
| 2114 tx = dmu_tx_create_assigned(dp, txg); | |
| 2115 bplist_sync(bpl, tx); | |
| 2116 dmu_tx_commit(tx); | |
| 2117 | |
| 2118 } while (dirty_vdevs); | |
| 2119 | |
| 2120 bplist_close(bpl); | |
| 2121 | |
| 2122 dprintf("txg %llu passes %d\n", txg, spa->spa_sync_pass); | |
| 2123 | |
| 2124 /* | |
| 2125 * Rewrite the vdev configuration (which includes the uberblock) | |
| 2126 * to commit the transaction group. | |
| 2127 */ | |
| 1544 | 2128 VERIFY(0 == spa_sync_labels(spa, txg)); |
| 789 | 2129 |
| 2130 /* | |
| 2131 * Make a stable copy of the fully synced uberblock. | |
| 2132 * We use this as the root for pool traversals. | |
| 2133 */ | |
| 2134 spa->spa_traverse_wanted = 1; /* tells traverse_more() to stop */ | |
| 2135 | |
| 2136 spa_scrub_suspend(spa); /* stop scrubbing and finish I/Os */ | |
| 2137 | |
| 2138 rw_enter(&spa->spa_traverse_lock, RW_WRITER); | |
| 2139 spa->spa_traverse_wanted = 0; | |
| 2140 spa->spa_ubsync = spa->spa_uberblock; | |
| 2141 rw_exit(&spa->spa_traverse_lock); | |
| 2142 | |
| 2143 spa_scrub_resume(spa); /* resume scrub with new ubsync */ | |
| 2144 | |
| 2145 /* | |
| 2146 * Clean up the ZIL records for the synced txg. | |
| 2147 */ | |
| 2148 dsl_pool_zil_clean(dp); | |
| 2149 | |
| 2150 /* | |
| 2151 * Update usable space statistics. | |
| 2152 */ | |
| 2153 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) | |
| 2154 vdev_sync_done(vd, txg); | |
| 2155 | |
| 2156 /* | |
| 2157 * It had better be the case that we didn't dirty anything | |
| 2158 * since spa_sync_labels(). | |
| 2159 */ | |
| 2160 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); | |
| 2161 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); | |
| 2162 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); | |
| 2163 ASSERT(bpl->bpl_queue == NULL); | |
| 2164 | |
| 1544 | 2165 spa_config_exit(spa, FTAG); |
| 2166 | |
| 2167 /* | |
| 2168 * If any async tasks have been requested, kick them off. | |
| 2169 */ | |
| 2170 spa_async_dispatch(spa); | |
| 789 | 2171 } |
| 2172 | |
| 2173 /* | |
| 2174 * Sync all pools. We don't want to hold the namespace lock across these | |
| 2175 * operations, so we take a reference on the spa_t and drop the lock during the | |
| 2176 * sync. | |
| 2177 */ | |
| 2178 void | |
| 2179 spa_sync_allpools(void) | |
| 2180 { | |
| 2181 spa_t *spa = NULL; | |
| 2182 mutex_enter(&spa_namespace_lock); | |
| 2183 while ((spa = spa_next(spa)) != NULL) { | |
| 2184 if (spa_state(spa) != POOL_STATE_ACTIVE) | |
| 2185 continue; | |
| 2186 spa_open_ref(spa, FTAG); | |
| 2187 mutex_exit(&spa_namespace_lock); | |
| 2188 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 2189 mutex_enter(&spa_namespace_lock); | |
| 2190 spa_close(spa, FTAG); | |
| 2191 } | |
| 2192 mutex_exit(&spa_namespace_lock); | |
| 2193 } | |
| 2194 | |
| 2195 /* | |
| 2196 * ========================================================================== | |
| 2197 * Miscellaneous routines | |
| 2198 * ========================================================================== | |
| 2199 */ | |
| 2200 | |
| 2201 int | |
| 2202 spa_busy(void) | |
| 2203 { | |
| 2204 return (spa_active_count != 0); | |
| 2205 } | |
| 2206 | |
| 2207 /* | |
| 2208 * Remove all pools in the system. | |
| 2209 */ | |
| 2210 void | |
| 2211 spa_evict_all(void) | |
| 2212 { | |
| 2213 spa_t *spa; | |
| 2214 | |
| 2215 /* | |
| 2216 * Remove all cached state. All pools should be closed now, | |
| 2217 * so every spa in the AVL tree should be unreferenced. | |
| 2218 */ | |
| 2219 mutex_enter(&spa_namespace_lock); | |
| 2220 while ((spa = spa_next(NULL)) != NULL) { | |
| 2221 /* | |
| 1544 | 2222 * Stop async tasks. The async thread may need to detach |
| 2223 * a device that's been replaced, which requires grabbing | |
| 2224 * spa_namespace_lock, so we must drop it here. | |
| 789 | 2225 */ |
| 2226 spa_open_ref(spa, FTAG); | |
| 2227 mutex_exit(&spa_namespace_lock); | |
| 1544 | 2228 spa_async_suspend(spa); |
| 789 | 2229 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); |
| 2230 mutex_enter(&spa_namespace_lock); | |
| 2231 spa_close(spa, FTAG); | |
| 2232 | |
| 2233 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 2234 spa_unload(spa); | |
| 2235 spa_deactivate(spa); | |
| 2236 } | |
| 2237 spa_remove(spa); | |
| 2238 } | |
| 2239 mutex_exit(&spa_namespace_lock); | |
| 2240 } | |
| 1544 | 2241 |
| 2242 vdev_t * | |
| 2243 spa_lookup_by_guid(spa_t *spa, uint64_t guid) | |
| 2244 { | |
| 2245 return (vdev_lookup_by_guid(spa->spa_root_vdev, guid)); | |
| 2246 } |