Mercurial > illumos > illumos-gate
annotate usr/src/uts/common/fs/zfs/spa.c @ 3912:f6891a60bd72
PSARC 2007/083 ZFS bootable datasets
4929890 ZFS Boot support for the x86 platform
6479807 pools need properties
6531774 reserve bits in directory entry for file type
| author | lling |
|---|---|
| date | Wed, 28 Mar 2007 12:48:13 -0700 |
| parents | 5340a4d98e0b |
| children | 6674f5d79069 |
| rev | line source |
|---|---|
| 789 | 1 /* |
| 2 * CDDL HEADER START | |
| 3 * | |
| 4 * The contents of this file are subject to the terms of the | |
| 1544 | 5 * Common Development and Distribution License (the "License"). |
| 6 * You may not use this file except in compliance with the License. | |
| 789 | 7 * |
| 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
| 9 * or http://www.opensolaris.org/os/licensing. | |
| 10 * See the License for the specific language governing permissions | |
| 11 * and limitations under the License. | |
| 12 * | |
| 13 * When distributing Covered Code, include this CDDL HEADER in each | |
| 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
| 15 * If applicable, add the following below this CDDL HEADER, with the | |
| 16 * fields enclosed by brackets "[]" replaced with your own identifying | |
| 17 * information: Portions Copyright [yyyy] [name of copyright owner] | |
| 18 * | |
| 19 * CDDL HEADER END | |
| 20 */ | |
| 2082 | 21 |
| 789 | 22 /* |
|
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23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
| 789 | 24 * Use is subject to license terms. |
| 25 */ | |
| 26 | |
| 27 #pragma ident "%Z%%M% %I% %E% SMI" | |
| 28 | |
| 29 /* | |
| 30 * This file contains all the routines used when modifying on-disk SPA state. | |
| 31 * This includes opening, importing, destroying, exporting a pool, and syncing a | |
| 32 * pool. | |
| 33 */ | |
| 34 | |
| 35 #include <sys/zfs_context.h> | |
| 1544 | 36 #include <sys/fm/fs/zfs.h> |
| 789 | 37 #include <sys/spa_impl.h> |
| 38 #include <sys/zio.h> | |
| 39 #include <sys/zio_checksum.h> | |
| 40 #include <sys/zio_compress.h> | |
| 41 #include <sys/dmu.h> | |
| 42 #include <sys/dmu_tx.h> | |
| 43 #include <sys/zap.h> | |
| 44 #include <sys/zil.h> | |
| 45 #include <sys/vdev_impl.h> | |
| 46 #include <sys/metaslab.h> | |
| 47 #include <sys/uberblock_impl.h> | |
| 48 #include <sys/txg.h> | |
| 49 #include <sys/avl.h> | |
| 50 #include <sys/dmu_traverse.h> | |
| 3912 | 51 #include <sys/dmu_objset.h> |
| 789 | 52 #include <sys/unique.h> |
| 53 #include <sys/dsl_pool.h> | |
| 3912 | 54 #include <sys/dsl_dataset.h> |
| 789 | 55 #include <sys/dsl_dir.h> |
| 56 #include <sys/dsl_prop.h> | |
| 3912 | 57 #include <sys/dsl_synctask.h> |
| 789 | 58 #include <sys/fs/zfs.h> |
| 59 #include <sys/callb.h> | |
| 60 | |
| 2986 | 61 int zio_taskq_threads = 8; |
| 62 | |
| 789 | 63 /* |
| 64 * ========================================================================== | |
| 65 * SPA state manipulation (open/create/destroy/import/export) | |
| 66 * ========================================================================== | |
| 67 */ | |
| 68 | |
| 1544 | 69 static int |
| 70 spa_error_entry_compare(const void *a, const void *b) | |
| 71 { | |
| 72 spa_error_entry_t *sa = (spa_error_entry_t *)a; | |
| 73 spa_error_entry_t *sb = (spa_error_entry_t *)b; | |
| 74 int ret; | |
| 75 | |
| 76 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, | |
| 77 sizeof (zbookmark_t)); | |
| 78 | |
| 79 if (ret < 0) | |
| 80 return (-1); | |
| 81 else if (ret > 0) | |
| 82 return (1); | |
| 83 else | |
| 84 return (0); | |
| 85 } | |
| 86 | |
| 87 /* | |
| 88 * Utility function which retrieves copies of the current logs and | |
| 89 * re-initializes them in the process. | |
| 90 */ | |
| 91 void | |
| 92 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) | |
| 93 { | |
| 94 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); | |
| 95 | |
| 96 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); | |
| 97 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); | |
| 98 | |
| 99 avl_create(&spa->spa_errlist_scrub, | |
| 100 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 101 offsetof(spa_error_entry_t, se_avl)); | |
| 102 avl_create(&spa->spa_errlist_last, | |
| 103 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 104 offsetof(spa_error_entry_t, se_avl)); | |
| 105 } | |
| 106 | |
| 789 | 107 /* |
| 108 * Activate an uninitialized pool. | |
| 109 */ | |
| 110 static void | |
| 111 spa_activate(spa_t *spa) | |
| 112 { | |
| 113 int t; | |
| 114 | |
| 115 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); | |
| 116 | |
| 117 spa->spa_state = POOL_STATE_ACTIVE; | |
| 118 | |
| 119 spa->spa_normal_class = metaslab_class_create(); | |
| 120 | |
| 121 for (t = 0; t < ZIO_TYPES; t++) { | |
| 122 spa->spa_zio_issue_taskq[t] = taskq_create("spa_zio_issue", | |
| 2986 | 123 zio_taskq_threads, maxclsyspri, 50, INT_MAX, |
| 789 | 124 TASKQ_PREPOPULATE); |
| 125 spa->spa_zio_intr_taskq[t] = taskq_create("spa_zio_intr", | |
| 2986 | 126 zio_taskq_threads, maxclsyspri, 50, INT_MAX, |
| 789 | 127 TASKQ_PREPOPULATE); |
| 128 } | |
| 129 | |
| 130 rw_init(&spa->spa_traverse_lock, NULL, RW_DEFAULT, NULL); | |
| 131 | |
| 2856 | 132 mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL); |
| 133 mutex_init(&spa->spa_config_cache_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 134 mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 135 mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 136 mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 137 mutex_init(&spa->spa_config_lock.scl_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 138 mutex_init(&spa->spa_sync_bplist.bpl_lock, NULL, MUTEX_DEFAULT, NULL); | |
| 2926 | 139 mutex_init(&spa->spa_history_lock, NULL, MUTEX_DEFAULT, NULL); |
| 3912 | 140 mutex_init(&spa->spa_props_lock, NULL, MUTEX_DEFAULT, NULL); |
| 2856 | 141 |
| 789 | 142 list_create(&spa->spa_dirty_list, sizeof (vdev_t), |
| 143 offsetof(vdev_t, vdev_dirty_node)); | |
| 144 | |
| 145 txg_list_create(&spa->spa_vdev_txg_list, | |
| 146 offsetof(struct vdev, vdev_txg_node)); | |
| 1544 | 147 |
| 148 avl_create(&spa->spa_errlist_scrub, | |
| 149 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 150 offsetof(spa_error_entry_t, se_avl)); | |
| 151 avl_create(&spa->spa_errlist_last, | |
| 152 spa_error_entry_compare, sizeof (spa_error_entry_t), | |
| 153 offsetof(spa_error_entry_t, se_avl)); | |
| 789 | 154 } |
| 155 | |
| 156 /* | |
| 157 * Opposite of spa_activate(). | |
| 158 */ | |
| 159 static void | |
| 160 spa_deactivate(spa_t *spa) | |
| 161 { | |
| 162 int t; | |
| 163 | |
| 164 ASSERT(spa->spa_sync_on == B_FALSE); | |
| 165 ASSERT(spa->spa_dsl_pool == NULL); | |
| 166 ASSERT(spa->spa_root_vdev == NULL); | |
| 167 | |
| 168 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); | |
| 169 | |
| 170 txg_list_destroy(&spa->spa_vdev_txg_list); | |
| 171 | |
| 172 list_destroy(&spa->spa_dirty_list); | |
| 173 | |
| 174 rw_destroy(&spa->spa_traverse_lock); | |
| 175 | |
| 176 for (t = 0; t < ZIO_TYPES; t++) { | |
| 177 taskq_destroy(spa->spa_zio_issue_taskq[t]); | |
| 178 taskq_destroy(spa->spa_zio_intr_taskq[t]); | |
| 179 spa->spa_zio_issue_taskq[t] = NULL; | |
| 180 spa->spa_zio_intr_taskq[t] = NULL; | |
| 181 } | |
| 182 | |
| 183 metaslab_class_destroy(spa->spa_normal_class); | |
| 184 spa->spa_normal_class = NULL; | |
| 185 | |
| 1544 | 186 /* |
| 187 * If this was part of an import or the open otherwise failed, we may | |
| 188 * still have errors left in the queues. Empty them just in case. | |
| 189 */ | |
| 190 spa_errlog_drain(spa); | |
| 191 | |
| 192 avl_destroy(&spa->spa_errlist_scrub); | |
| 193 avl_destroy(&spa->spa_errlist_last); | |
| 194 | |
| 789 | 195 spa->spa_state = POOL_STATE_UNINITIALIZED; |
| 196 } | |
| 197 | |
| 198 /* | |
| 199 * Verify a pool configuration, and construct the vdev tree appropriately. This | |
| 200 * will create all the necessary vdevs in the appropriate layout, with each vdev | |
| 201 * in the CLOSED state. This will prep the pool before open/creation/import. | |
| 202 * All vdev validation is done by the vdev_alloc() routine. | |
| 203 */ | |
| 2082 | 204 static int |
| 205 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, | |
| 206 uint_t id, int atype) | |
| 789 | 207 { |
| 208 nvlist_t **child; | |
| 209 uint_t c, children; | |
| 2082 | 210 int error; |
| 211 | |
| 212 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) | |
| 213 return (error); | |
| 214 | |
| 215 if ((*vdp)->vdev_ops->vdev_op_leaf) | |
| 216 return (0); | |
| 789 | 217 |
| 218 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, | |
| 219 &child, &children) != 0) { | |
| 2082 | 220 vdev_free(*vdp); |
| 221 *vdp = NULL; | |
| 222 return (EINVAL); | |
| 789 | 223 } |
| 224 | |
| 225 for (c = 0; c < children; c++) { | |
| 2082 | 226 vdev_t *vd; |
| 227 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, | |
| 228 atype)) != 0) { | |
| 229 vdev_free(*vdp); | |
| 230 *vdp = NULL; | |
| 231 return (error); | |
| 789 | 232 } |
| 233 } | |
| 234 | |
| 2082 | 235 ASSERT(*vdp != NULL); |
| 236 | |
| 237 return (0); | |
| 789 | 238 } |
| 239 | |
| 240 /* | |
| 241 * Opposite of spa_load(). | |
| 242 */ | |
| 243 static void | |
| 244 spa_unload(spa_t *spa) | |
| 245 { | |
| 2082 | 246 int i; |
| 247 | |
| 789 | 248 /* |
| 1544 | 249 * Stop async tasks. |
| 250 */ | |
| 251 spa_async_suspend(spa); | |
| 252 | |
| 253 /* | |
| 789 | 254 * Stop syncing. |
| 255 */ | |
| 256 if (spa->spa_sync_on) { | |
| 257 txg_sync_stop(spa->spa_dsl_pool); | |
| 258 spa->spa_sync_on = B_FALSE; | |
| 259 } | |
| 260 | |
| 261 /* | |
| 262 * Wait for any outstanding prefetch I/O to complete. | |
| 263 */ | |
| 1544 | 264 spa_config_enter(spa, RW_WRITER, FTAG); |
| 265 spa_config_exit(spa, FTAG); | |
| 789 | 266 |
| 267 /* | |
| 268 * Close the dsl pool. | |
| 269 */ | |
| 270 if (spa->spa_dsl_pool) { | |
| 271 dsl_pool_close(spa->spa_dsl_pool); | |
| 272 spa->spa_dsl_pool = NULL; | |
| 273 } | |
| 274 | |
| 275 /* | |
| 276 * Close all vdevs. | |
| 277 */ | |
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278 if (spa->spa_root_vdev) |
| 789 | 279 vdev_free(spa->spa_root_vdev); |
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280 ASSERT(spa->spa_root_vdev == NULL); |
| 1544 | 281 |
| 2082 | 282 for (i = 0; i < spa->spa_nspares; i++) |
| 283 vdev_free(spa->spa_spares[i]); | |
| 284 if (spa->spa_spares) { | |
| 285 kmem_free(spa->spa_spares, spa->spa_nspares * sizeof (void *)); | |
| 286 spa->spa_spares = NULL; | |
| 287 } | |
| 288 if (spa->spa_sparelist) { | |
| 289 nvlist_free(spa->spa_sparelist); | |
| 290 spa->spa_sparelist = NULL; | |
| 291 } | |
| 292 | |
| 1544 | 293 spa->spa_async_suspended = 0; |
| 789 | 294 } |
| 295 | |
| 296 /* | |
| 2082 | 297 * Load (or re-load) the current list of vdevs describing the active spares for |
| 298 * this pool. When this is called, we have some form of basic information in | |
| 299 * 'spa_sparelist'. We parse this into vdevs, try to open them, and then | |
| 300 * re-generate a more complete list including status information. | |
| 301 */ | |
| 302 static void | |
| 303 spa_load_spares(spa_t *spa) | |
| 304 { | |
| 305 nvlist_t **spares; | |
| 306 uint_t nspares; | |
| 307 int i; | |
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308 vdev_t *vd, *tvd; |
| 2082 | 309 |
| 310 /* | |
| 311 * First, close and free any existing spare vdevs. | |
| 312 */ | |
| 313 for (i = 0; i < spa->spa_nspares; i++) { | |
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314 vd = spa->spa_spares[i]; |
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315 |
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316 /* Undo the call to spa_activate() below */ |
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317 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid)) != NULL && |
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318 tvd->vdev_isspare) |
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319 spa_spare_remove(tvd); |
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320 vdev_close(vd); |
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321 vdev_free(vd); |
| 2082 | 322 } |
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323 |
| 2082 | 324 if (spa->spa_spares) |
| 325 kmem_free(spa->spa_spares, spa->spa_nspares * sizeof (void *)); | |
| 326 | |
| 327 if (spa->spa_sparelist == NULL) | |
| 328 nspares = 0; | |
| 329 else | |
| 330 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 331 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 332 | |
| 333 spa->spa_nspares = (int)nspares; | |
| 334 spa->spa_spares = NULL; | |
| 335 | |
| 336 if (nspares == 0) | |
| 337 return; | |
| 338 | |
| 339 /* | |
| 340 * Construct the array of vdevs, opening them to get status in the | |
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341 * process. For each spare, there is potentially two different vdev_t |
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342 * structures associated with it: one in the list of spares (used only |
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343 * for basic validation purposes) and one in the active vdev |
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344 * configuration (if it's spared in). During this phase we open and |
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345 * validate each vdev on the spare list. If the vdev also exists in the |
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346 * active configuration, then we also mark this vdev as an active spare. |
| 2082 | 347 */ |
| 348 spa->spa_spares = kmem_alloc(nspares * sizeof (void *), KM_SLEEP); | |
| 349 for (i = 0; i < spa->spa_nspares; i++) { | |
| 350 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 351 VDEV_ALLOC_SPARE) == 0); | |
| 352 ASSERT(vd != NULL); | |
| 353 | |
| 354 spa->spa_spares[i] = vd; | |
| 355 | |
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356 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid)) != NULL) { |
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357 if (!tvd->vdev_isspare) |
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358 spa_spare_add(tvd); |
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359 |
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360 /* |
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361 * We only mark the spare active if we were successfully |
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362 * able to load the vdev. Otherwise, importing a pool |
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363 * with a bad active spare would result in strange |
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364 * behavior, because multiple pool would think the spare |
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365 * is actively in use. |
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366 * |
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367 * There is a vulnerability here to an equally bizarre |
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368 * circumstance, where a dead active spare is later |
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369 * brought back to life (onlined or otherwise). Given |
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370 * the rarity of this scenario, and the extra complexity |
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371 * it adds, we ignore the possibility. |
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372 */ |
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373 if (!vdev_is_dead(tvd)) |
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374 spa_spare_activate(tvd); |
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375 } |
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376 |
| 2082 | 377 if (vdev_open(vd) != 0) |
| 378 continue; | |
| 379 | |
| 380 vd->vdev_top = vd; | |
| 381 (void) vdev_validate_spare(vd); | |
| 382 } | |
| 383 | |
| 384 /* | |
| 385 * Recompute the stashed list of spares, with status information | |
| 386 * this time. | |
| 387 */ | |
| 388 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 389 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 390 | |
| 391 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), KM_SLEEP); | |
| 392 for (i = 0; i < spa->spa_nspares; i++) | |
| 393 spares[i] = vdev_config_generate(spa, spa->spa_spares[i], | |
| 394 B_TRUE, B_TRUE); | |
| 395 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 396 spares, spa->spa_nspares) == 0); | |
| 397 for (i = 0; i < spa->spa_nspares; i++) | |
| 398 nvlist_free(spares[i]); | |
| 399 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 400 } | |
| 401 | |
| 402 static int | |
| 403 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) | |
| 404 { | |
| 405 dmu_buf_t *db; | |
| 406 char *packed = NULL; | |
| 407 size_t nvsize = 0; | |
| 408 int error; | |
| 409 *value = NULL; | |
| 410 | |
| 411 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 412 nvsize = *(uint64_t *)db->db_data; | |
| 413 dmu_buf_rele(db, FTAG); | |
| 414 | |
| 415 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 416 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed); | |
| 417 if (error == 0) | |
| 418 error = nvlist_unpack(packed, nvsize, value, 0); | |
| 419 kmem_free(packed, nvsize); | |
| 420 | |
| 421 return (error); | |
| 422 } | |
| 423 | |
| 424 /* | |
| 789 | 425 * Load an existing storage pool, using the pool's builtin spa_config as a |
| 1544 | 426 * source of configuration information. |
| 789 | 427 */ |
| 428 static int | |
| 1544 | 429 spa_load(spa_t *spa, nvlist_t *config, spa_load_state_t state, int mosconfig) |
| 789 | 430 { |
| 431 int error = 0; | |
| 432 nvlist_t *nvroot = NULL; | |
| 433 vdev_t *rvd; | |
| 434 uberblock_t *ub = &spa->spa_uberblock; | |
|
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435 uint64_t config_cache_txg = spa->spa_config_txg; |
| 789 | 436 uint64_t pool_guid; |
| 2082 | 437 uint64_t version; |
| 789 | 438 zio_t *zio; |
| 439 | |
| 1544 | 440 spa->spa_load_state = state; |
|
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441 |
| 789 | 442 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || |
| 1733 | 443 nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) { |
| 1544 | 444 error = EINVAL; |
| 445 goto out; | |
| 446 } | |
| 789 | 447 |
| 2082 | 448 /* |
| 449 * Versioning wasn't explicitly added to the label until later, so if | |
| 450 * it's not present treat it as the initial version. | |
| 451 */ | |
| 452 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, &version) != 0) | |
| 453 version = ZFS_VERSION_INITIAL; | |
| 454 | |
| 1733 | 455 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, |
| 456 &spa->spa_config_txg); | |
| 457 | |
|
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458 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && |
| 1544 | 459 spa_guid_exists(pool_guid, 0)) { |
| 460 error = EEXIST; | |
| 461 goto out; | |
| 462 } | |
| 789 | 463 |
|
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464 spa->spa_load_guid = pool_guid; |
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465 |
| 789 | 466 /* |
| 2082 | 467 * Parse the configuration into a vdev tree. We explicitly set the |
| 468 * value that will be returned by spa_version() since parsing the | |
| 469 * configuration requires knowing the version number. | |
| 789 | 470 */ |
| 1544 | 471 spa_config_enter(spa, RW_WRITER, FTAG); |
| 2082 | 472 spa->spa_ubsync.ub_version = version; |
| 473 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_LOAD); | |
| 1544 | 474 spa_config_exit(spa, FTAG); |
| 789 | 475 |
| 2082 | 476 if (error != 0) |
| 1544 | 477 goto out; |
| 789 | 478 |
|
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479 ASSERT(spa->spa_root_vdev == rvd); |
| 789 | 480 ASSERT(spa_guid(spa) == pool_guid); |
| 481 | |
| 482 /* | |
| 483 * Try to open all vdevs, loading each label in the process. | |
| 484 */ | |
| 1544 | 485 if (vdev_open(rvd) != 0) { |
| 486 error = ENXIO; | |
| 487 goto out; | |
| 488 } | |
| 789 | 489 |
| 490 /* | |
|
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491 * Validate the labels for all leaf vdevs. We need to grab the config |
|
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492 * lock because all label I/O is done with the ZIO_FLAG_CONFIG_HELD |
|
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493 * flag. |
|
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494 */ |
|
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495 spa_config_enter(spa, RW_READER, FTAG); |
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496 error = vdev_validate(rvd); |
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497 spa_config_exit(spa, FTAG); |
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498 |
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499 if (error != 0) { |
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500 error = EBADF; |
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501 goto out; |
|
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502 } |
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503 |
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504 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
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505 error = ENXIO; |
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506 goto out; |
|
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507 } |
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508 |
|
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|
509 /* |
| 789 | 510 * Find the best uberblock. |
| 511 */ | |
| 512 bzero(ub, sizeof (uberblock_t)); | |
| 513 | |
| 514 zio = zio_root(spa, NULL, NULL, | |
| 515 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); | |
| 516 vdev_uberblock_load(zio, rvd, ub); | |
| 517 error = zio_wait(zio); | |
| 518 | |
| 519 /* | |
| 520 * If we weren't able to find a single valid uberblock, return failure. | |
| 521 */ | |
| 522 if (ub->ub_txg == 0) { | |
| 1760 | 523 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 524 VDEV_AUX_CORRUPT_DATA); | |
| 1544 | 525 error = ENXIO; |
| 526 goto out; | |
| 527 } | |
| 528 | |
| 529 /* | |
| 530 * If the pool is newer than the code, we can't open it. | |
| 531 */ | |
| 1760 | 532 if (ub->ub_version > ZFS_VERSION) { |
| 533 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 534 VDEV_AUX_VERSION_NEWER); | |
| 1544 | 535 error = ENOTSUP; |
| 536 goto out; | |
| 789 | 537 } |
| 538 | |
| 539 /* | |
| 540 * If the vdev guid sum doesn't match the uberblock, we have an | |
| 541 * incomplete configuration. | |
| 542 */ | |
| 1732 | 543 if (rvd->vdev_guid_sum != ub->ub_guid_sum && mosconfig) { |
| 1544 | 544 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 545 VDEV_AUX_BAD_GUID_SUM); | |
| 546 error = ENXIO; | |
| 547 goto out; | |
| 789 | 548 } |
| 549 | |
| 550 /* | |
| 551 * Initialize internal SPA structures. | |
| 552 */ | |
| 553 spa->spa_state = POOL_STATE_ACTIVE; | |
| 554 spa->spa_ubsync = spa->spa_uberblock; | |
| 555 spa->spa_first_txg = spa_last_synced_txg(spa) + 1; | |
| 1544 | 556 error = dsl_pool_open(spa, spa->spa_first_txg, &spa->spa_dsl_pool); |
| 557 if (error) { | |
| 558 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 559 VDEV_AUX_CORRUPT_DATA); | |
| 560 goto out; | |
| 561 } | |
| 789 | 562 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; |
| 563 | |
| 1544 | 564 if (zap_lookup(spa->spa_meta_objset, |
| 789 | 565 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 566 sizeof (uint64_t), 1, &spa->spa_config_object) != 0) { |
| 567 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 568 VDEV_AUX_CORRUPT_DATA); | |
| 569 error = EIO; | |
| 570 goto out; | |
| 571 } | |
| 789 | 572 |
| 573 if (!mosconfig) { | |
| 2082 | 574 nvlist_t *newconfig; |
| 575 | |
| 576 if (load_nvlist(spa, spa->spa_config_object, &newconfig) != 0) { | |
| 1544 | 577 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 578 VDEV_AUX_CORRUPT_DATA); | |
| 579 error = EIO; | |
| 580 goto out; | |
| 581 } | |
| 789 | 582 |
| 583 spa_config_set(spa, newconfig); | |
| 584 spa_unload(spa); | |
| 585 spa_deactivate(spa); | |
| 586 spa_activate(spa); | |
| 587 | |
| 1544 | 588 return (spa_load(spa, newconfig, state, B_TRUE)); |
| 589 } | |
| 590 | |
| 591 if (zap_lookup(spa->spa_meta_objset, | |
| 592 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, | |
| 593 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj) != 0) { | |
| 594 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 595 VDEV_AUX_CORRUPT_DATA); | |
| 596 error = EIO; | |
| 597 goto out; | |
| 789 | 598 } |
| 599 | |
| 1544 | 600 /* |
| 2082 | 601 * Load the bit that tells us to use the new accounting function |
| 602 * (raid-z deflation). If we have an older pool, this will not | |
| 603 * be present. | |
| 604 */ | |
| 605 error = zap_lookup(spa->spa_meta_objset, | |
| 606 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 607 sizeof (uint64_t), 1, &spa->spa_deflate); | |
| 608 if (error != 0 && error != ENOENT) { | |
| 609 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 610 VDEV_AUX_CORRUPT_DATA); | |
| 611 error = EIO; | |
| 612 goto out; | |
| 613 } | |
| 614 | |
| 615 /* | |
| 1544 | 616 * Load the persistent error log. If we have an older pool, this will |
| 617 * not be present. | |
| 618 */ | |
| 619 error = zap_lookup(spa->spa_meta_objset, | |
| 620 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_LAST, | |
| 621 sizeof (uint64_t), 1, &spa->spa_errlog_last); | |
|
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622 if (error != 0 && error != ENOENT) { |
| 1544 | 623 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, |
| 624 VDEV_AUX_CORRUPT_DATA); | |
| 625 error = EIO; | |
| 626 goto out; | |
| 627 } | |
| 628 | |
| 629 error = zap_lookup(spa->spa_meta_objset, | |
| 630 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_ERRLOG_SCRUB, | |
| 631 sizeof (uint64_t), 1, &spa->spa_errlog_scrub); | |
| 632 if (error != 0 && error != ENOENT) { | |
| 633 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 634 VDEV_AUX_CORRUPT_DATA); | |
| 635 error = EIO; | |
| 636 goto out; | |
| 637 } | |
| 789 | 638 |
| 639 /* | |
| 2926 | 640 * Load the history object. If we have an older pool, this |
| 641 * will not be present. | |
| 642 */ | |
| 643 error = zap_lookup(spa->spa_meta_objset, | |
| 644 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_HISTORY, | |
| 645 sizeof (uint64_t), 1, &spa->spa_history); | |
| 646 if (error != 0 && error != ENOENT) { | |
| 647 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 648 VDEV_AUX_CORRUPT_DATA); | |
| 649 error = EIO; | |
| 650 goto out; | |
| 651 } | |
| 652 | |
| 653 /* | |
| 2082 | 654 * Load any hot spares for this pool. |
| 655 */ | |
| 656 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, | |
| 657 DMU_POOL_SPARES, sizeof (uint64_t), 1, &spa->spa_spares_object); | |
| 658 if (error != 0 && error != ENOENT) { | |
| 659 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 660 VDEV_AUX_CORRUPT_DATA); | |
| 661 error = EIO; | |
| 662 goto out; | |
| 663 } | |
| 664 if (error == 0) { | |
| 665 ASSERT(spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 666 if (load_nvlist(spa, spa->spa_spares_object, | |
| 667 &spa->spa_sparelist) != 0) { | |
| 668 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 669 VDEV_AUX_CORRUPT_DATA); | |
| 670 error = EIO; | |
| 671 goto out; | |
| 672 } | |
| 673 | |
| 674 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 675 spa_load_spares(spa); | |
| 676 spa_config_exit(spa, FTAG); | |
| 677 } | |
| 678 | |
| 3912 | 679 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, |
| 680 DMU_POOL_PROPS, sizeof (uint64_t), 1, &spa->spa_pool_props_object); | |
| 681 | |
| 682 if (error && error != ENOENT) { | |
| 683 vdev_set_state(rvd, B_TRUE, VDEV_STATE_CANT_OPEN, | |
| 684 VDEV_AUX_CORRUPT_DATA); | |
| 685 error = EIO; | |
| 686 goto out; | |
| 687 } | |
| 688 | |
| 689 if (error == 0) { | |
| 690 (void) zap_lookup(spa->spa_meta_objset, | |
| 691 spa->spa_pool_props_object, | |
| 692 zpool_prop_to_name(ZFS_PROP_BOOTFS), | |
| 693 sizeof (uint64_t), 1, &spa->spa_bootfs); | |
| 694 } | |
| 695 | |
| 2082 | 696 /* |
|
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|
697 * Load the vdev state for all toplevel vdevs. |
| 789 | 698 */ |
|
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699 vdev_load(rvd); |
| 789 | 700 |
| 701 /* | |
| 702 * Propagate the leaf DTLs we just loaded all the way up the tree. | |
| 703 */ | |
| 1544 | 704 spa_config_enter(spa, RW_WRITER, FTAG); |
| 789 | 705 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); |
| 1544 | 706 spa_config_exit(spa, FTAG); |
| 789 | 707 |
| 708 /* | |
| 709 * Check the state of the root vdev. If it can't be opened, it | |
| 710 * indicates one or more toplevel vdevs are faulted. | |
| 711 */ | |
| 1544 | 712 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { |
| 713 error = ENXIO; | |
| 714 goto out; | |
| 715 } | |
| 789 | 716 |
| 1544 | 717 if ((spa_mode & FWRITE) && state != SPA_LOAD_TRYIMPORT) { |
|
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718 dmu_tx_t *tx; |
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719 int need_update = B_FALSE; |
|
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720 int c; |
|
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721 |
|
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722 /* |
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723 * Claim log blocks that haven't been committed yet. |
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724 * This must all happen in a single txg. |
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725 */ |
|
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726 tx = dmu_tx_create_assigned(spa_get_dsl(spa), |
| 789 | 727 spa_first_txg(spa)); |
| 2417 | 728 (void) dmu_objset_find(spa->spa_name, |
| 729 zil_claim, tx, DS_FIND_CHILDREN); | |
| 789 | 730 dmu_tx_commit(tx); |
| 731 | |
| 732 spa->spa_sync_on = B_TRUE; | |
| 733 txg_sync_start(spa->spa_dsl_pool); | |
| 734 | |
| 735 /* | |
| 736 * Wait for all claims to sync. | |
| 737 */ | |
| 738 txg_wait_synced(spa->spa_dsl_pool, 0); | |
|
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|
739 |
|
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740 /* |
|
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741 * If the config cache is stale, or we have uninitialized |
|
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742 * metaslabs (see spa_vdev_add()), then update the config. |
|
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743 */ |
|
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744 if (config_cache_txg != spa->spa_config_txg || |
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745 state == SPA_LOAD_IMPORT) |
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746 need_update = B_TRUE; |
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747 |
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748 for (c = 0; c < rvd->vdev_children; c++) |
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749 if (rvd->vdev_child[c]->vdev_ms_array == 0) |
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750 need_update = B_TRUE; |
|
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751 |
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752 /* |
|
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753 * Update the config cache asychronously in case we're the |
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754 * root pool, in which case the config cache isn't writable yet. |
|
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755 */ |
|
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756 if (need_update) |
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757 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); |
| 789 | 758 } |
| 759 | |
| 1544 | 760 error = 0; |
| 761 out: | |
| 2082 | 762 if (error && error != EBADF) |
| 1544 | 763 zfs_ereport_post(FM_EREPORT_ZFS_POOL, spa, NULL, NULL, 0, 0); |
| 764 spa->spa_load_state = SPA_LOAD_NONE; | |
| 765 spa->spa_ena = 0; | |
| 766 | |
| 767 return (error); | |
| 789 | 768 } |
| 769 | |
| 770 /* | |
| 771 * Pool Open/Import | |
| 772 * | |
| 773 * The import case is identical to an open except that the configuration is sent | |
| 774 * down from userland, instead of grabbed from the configuration cache. For the | |
| 775 * case of an open, the pool configuration will exist in the | |
| 776 * POOL_STATE_UNITIALIZED state. | |
| 777 * | |
| 778 * The stats information (gen/count/ustats) is used to gather vdev statistics at | |
| 779 * the same time open the pool, without having to keep around the spa_t in some | |
| 780 * ambiguous state. | |
| 781 */ | |
| 782 static int | |
| 783 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t **config) | |
| 784 { | |
| 785 spa_t *spa; | |
| 786 int error; | |
| 787 int loaded = B_FALSE; | |
| 788 int locked = B_FALSE; | |
| 789 | |
| 790 *spapp = NULL; | |
| 791 | |
| 792 /* | |
| 793 * As disgusting as this is, we need to support recursive calls to this | |
| 794 * function because dsl_dir_open() is called during spa_load(), and ends | |
| 795 * up calling spa_open() again. The real fix is to figure out how to | |
| 796 * avoid dsl_dir_open() calling this in the first place. | |
| 797 */ | |
| 798 if (mutex_owner(&spa_namespace_lock) != curthread) { | |
| 799 mutex_enter(&spa_namespace_lock); | |
| 800 locked = B_TRUE; | |
| 801 } | |
| 802 | |
| 803 if ((spa = spa_lookup(pool)) == NULL) { | |
| 804 if (locked) | |
| 805 mutex_exit(&spa_namespace_lock); | |
| 806 return (ENOENT); | |
| 807 } | |
| 808 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { | |
| 809 | |
| 810 spa_activate(spa); | |
| 811 | |
|
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812 error = spa_load(spa, spa->spa_config, SPA_LOAD_OPEN, B_FALSE); |
| 789 | 813 |
| 814 if (error == EBADF) { | |
| 815 /* | |
|
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816 * If vdev_validate() returns failure (indicated by |
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817 * EBADF), it indicates that one of the vdevs indicates |
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818 * that the pool has been exported or destroyed. If |
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819 * this is the case, the config cache is out of sync and |
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820 * we should remove the pool from the namespace. |
| 789 | 821 */ |
| 2082 | 822 zfs_post_ok(spa, NULL); |
| 789 | 823 spa_unload(spa); |
| 824 spa_deactivate(spa); | |
| 825 spa_remove(spa); | |
| 826 spa_config_sync(); | |
| 827 if (locked) | |
| 828 mutex_exit(&spa_namespace_lock); | |
| 829 return (ENOENT); | |
| 1544 | 830 } |
| 831 | |
| 832 if (error) { | |
| 789 | 833 /* |
| 834 * We can't open the pool, but we still have useful | |
| 835 * information: the state of each vdev after the | |
| 836 * attempted vdev_open(). Return this to the user. | |
| 837 */ | |
|
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838 if (config != NULL && spa->spa_root_vdev != NULL) { |
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839 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 840 *config = spa_config_generate(spa, NULL, -1ULL, |
| 841 B_TRUE); | |
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842 spa_config_exit(spa, FTAG); |
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843 } |
| 789 | 844 spa_unload(spa); |
| 845 spa_deactivate(spa); | |
| 1544 | 846 spa->spa_last_open_failed = B_TRUE; |
| 789 | 847 if (locked) |
| 848 mutex_exit(&spa_namespace_lock); | |
| 849 *spapp = NULL; | |
| 850 return (error); | |
| 1544 | 851 } else { |
| 852 zfs_post_ok(spa, NULL); | |
| 853 spa->spa_last_open_failed = B_FALSE; | |
| 789 | 854 } |
| 855 | |
| 856 loaded = B_TRUE; | |
| 857 } | |
| 858 | |
| 859 spa_open_ref(spa, tag); | |
| 860 if (locked) | |
| 861 mutex_exit(&spa_namespace_lock); | |
| 862 | |
| 863 *spapp = spa; | |
| 864 | |
| 865 if (config != NULL) { | |
| 1544 | 866 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 867 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
| 1544 | 868 spa_config_exit(spa, FTAG); |
| 789 | 869 } |
| 870 | |
| 871 /* | |
| 872 * If we just loaded the pool, resilver anything that's out of date. | |
| 873 */ | |
| 874 if (loaded && (spa_mode & FWRITE)) | |
| 875 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 876 | |
| 877 return (0); | |
| 878 } | |
| 879 | |
| 880 int | |
| 881 spa_open(const char *name, spa_t **spapp, void *tag) | |
| 882 { | |
| 883 return (spa_open_common(name, spapp, tag, NULL)); | |
| 884 } | |
| 885 | |
| 1544 | 886 /* |
| 887 * Lookup the given spa_t, incrementing the inject count in the process, | |
| 888 * preventing it from being exported or destroyed. | |
| 889 */ | |
| 890 spa_t * | |
| 891 spa_inject_addref(char *name) | |
| 892 { | |
| 893 spa_t *spa; | |
| 894 | |
| 895 mutex_enter(&spa_namespace_lock); | |
| 896 if ((spa = spa_lookup(name)) == NULL) { | |
| 897 mutex_exit(&spa_namespace_lock); | |
| 898 return (NULL); | |
| 899 } | |
| 900 spa->spa_inject_ref++; | |
| 901 mutex_exit(&spa_namespace_lock); | |
| 902 | |
| 903 return (spa); | |
| 904 } | |
| 905 | |
| 906 void | |
| 907 spa_inject_delref(spa_t *spa) | |
| 908 { | |
| 909 mutex_enter(&spa_namespace_lock); | |
| 910 spa->spa_inject_ref--; | |
| 911 mutex_exit(&spa_namespace_lock); | |
| 912 } | |
| 913 | |
| 2082 | 914 static void |
| 915 spa_add_spares(spa_t *spa, nvlist_t *config) | |
| 916 { | |
| 917 nvlist_t **spares; | |
| 918 uint_t i, nspares; | |
| 919 nvlist_t *nvroot; | |
| 920 uint64_t guid; | |
| 921 vdev_stat_t *vs; | |
| 922 uint_t vsc; | |
|
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923 uint64_t pool; |
| 2082 | 924 |
| 925 if (spa->spa_nspares == 0) | |
| 926 return; | |
| 927 | |
| 928 VERIFY(nvlist_lookup_nvlist(config, | |
| 929 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); | |
| 930 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 931 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 932 if (nspares != 0) { | |
| 933 VERIFY(nvlist_add_nvlist_array(nvroot, | |
| 934 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 935 VERIFY(nvlist_lookup_nvlist_array(nvroot, | |
| 936 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 937 | |
| 938 /* | |
| 939 * Go through and find any spares which have since been | |
| 940 * repurposed as an active spare. If this is the case, update | |
| 941 * their status appropriately. | |
| 942 */ | |
| 943 for (i = 0; i < nspares; i++) { | |
| 944 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 945 ZPOOL_CONFIG_GUID, &guid) == 0); | |
|
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946 if (spa_spare_exists(guid, &pool) && pool != 0ULL) { |
| 2082 | 947 VERIFY(nvlist_lookup_uint64_array( |
| 948 spares[i], ZPOOL_CONFIG_STATS, | |
| 949 (uint64_t **)&vs, &vsc) == 0); | |
| 950 vs->vs_state = VDEV_STATE_CANT_OPEN; | |
| 951 vs->vs_aux = VDEV_AUX_SPARED; | |
| 952 } | |
| 953 } | |
| 954 } | |
| 955 } | |
| 956 | |
| 789 | 957 int |
| 1544 | 958 spa_get_stats(const char *name, nvlist_t **config, char *altroot, size_t buflen) |
| 789 | 959 { |
| 960 int error; | |
| 961 spa_t *spa; | |
| 962 | |
| 963 *config = NULL; | |
| 964 error = spa_open_common(name, &spa, FTAG, config); | |
| 965 | |
| 2082 | 966 if (spa && *config != NULL) { |
| 1544 | 967 VERIFY(nvlist_add_uint64(*config, ZPOOL_CONFIG_ERRCOUNT, |
| 968 spa_get_errlog_size(spa)) == 0); | |
| 969 | |
| 2082 | 970 spa_add_spares(spa, *config); |
| 971 } | |
| 972 | |
| 1544 | 973 /* |
| 974 * We want to get the alternate root even for faulted pools, so we cheat | |
| 975 * and call spa_lookup() directly. | |
| 976 */ | |
| 977 if (altroot) { | |
| 978 if (spa == NULL) { | |
| 979 mutex_enter(&spa_namespace_lock); | |
| 980 spa = spa_lookup(name); | |
| 981 if (spa) | |
| 982 spa_altroot(spa, altroot, buflen); | |
| 983 else | |
| 984 altroot[0] = '\0'; | |
| 985 spa = NULL; | |
| 986 mutex_exit(&spa_namespace_lock); | |
| 987 } else { | |
| 988 spa_altroot(spa, altroot, buflen); | |
| 989 } | |
| 990 } | |
| 991 | |
| 789 | 992 if (spa != NULL) |
| 993 spa_close(spa, FTAG); | |
| 994 | |
| 995 return (error); | |
| 996 } | |
| 997 | |
| 998 /* | |
| 2082 | 999 * Validate that the 'spares' array is well formed. We must have an array of |
|
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|
1000 * nvlists, each which describes a valid leaf vdev. If this is an import (mode |
|
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|
1001 * is VDEV_ALLOC_SPARE), then we allow corrupted spares to be specified, as long |
|
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|
1002 * as they are well-formed. |
| 2082 | 1003 */ |
| 1004 static int | |
| 1005 spa_validate_spares(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) | |
| 1006 { | |
| 1007 nvlist_t **spares; | |
| 1008 uint_t i, nspares; | |
| 1009 vdev_t *vd; | |
| 1010 int error; | |
| 1011 | |
| 1012 /* | |
| 1013 * It's acceptable to have no spares specified. | |
| 1014 */ | |
| 1015 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1016 &spares, &nspares) != 0) | |
| 1017 return (0); | |
| 1018 | |
| 1019 if (nspares == 0) | |
| 1020 return (EINVAL); | |
| 1021 | |
| 1022 /* | |
| 1023 * Make sure the pool is formatted with a version that supports hot | |
| 1024 * spares. | |
| 1025 */ | |
| 1026 if (spa_version(spa) < ZFS_VERSION_SPARES) | |
| 1027 return (ENOTSUP); | |
| 1028 | |
|
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|
1029 /* |
|
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|
1030 * Set the pending spare list so we correctly handle device in-use |
|
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|
1031 * checking. |
|
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|
1032 */ |
|
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1033 spa->spa_pending_spares = spares; |
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1034 spa->spa_pending_nspares = nspares; |
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1035 |
| 2082 | 1036 for (i = 0; i < nspares; i++) { |
| 1037 if ((error = spa_config_parse(spa, &vd, spares[i], NULL, 0, | |
| 1038 mode)) != 0) | |
|
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1039 goto out; |
| 2082 | 1040 |
| 1041 if (!vd->vdev_ops->vdev_op_leaf) { | |
| 1042 vdev_free(vd); | |
|
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1043 error = EINVAL; |
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|
1044 goto out; |
| 2082 | 1045 } |
| 1046 | |
| 1047 vd->vdev_top = vd; | |
|
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1048 |
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1049 if ((error = vdev_open(vd)) == 0 && |
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1050 (error = vdev_label_init(vd, crtxg, |
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1051 VDEV_LABEL_SPARE)) == 0) { |
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1052 VERIFY(nvlist_add_uint64(spares[i], ZPOOL_CONFIG_GUID, |
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1053 vd->vdev_guid) == 0); |
| 2082 | 1054 } |
| 1055 | |
| 1056 vdev_free(vd); | |
|
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1057 |
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1058 if (error && mode != VDEV_ALLOC_SPARE) |
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|
1059 goto out; |
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|
1060 else |
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1061 error = 0; |
| 2082 | 1062 } |
| 1063 | |
|
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1064 out: |
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1065 spa->spa_pending_spares = NULL; |
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1066 spa->spa_pending_nspares = 0; |
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1067 return (error); |
| 2082 | 1068 } |
| 1069 | |
| 1070 /* | |
| 789 | 1071 * Pool Creation |
| 1072 */ | |
| 1073 int | |
|
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1074 spa_create(const char *pool, nvlist_t *nvroot, const char *altroot) |
| 789 | 1075 { |
| 1076 spa_t *spa; | |
|
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1077 vdev_t *rvd; |
| 789 | 1078 dsl_pool_t *dp; |
| 1079 dmu_tx_t *tx; | |
| 2082 | 1080 int c, error = 0; |
| 789 | 1081 uint64_t txg = TXG_INITIAL; |
| 2082 | 1082 nvlist_t **spares; |
| 1083 uint_t nspares; | |
| 789 | 1084 |
| 1085 /* | |
| 1086 * If this pool already exists, return failure. | |
| 1087 */ | |
| 1088 mutex_enter(&spa_namespace_lock); | |
| 1089 if (spa_lookup(pool) != NULL) { | |
| 1090 mutex_exit(&spa_namespace_lock); | |
| 1091 return (EEXIST); | |
| 1092 } | |
| 1093 | |
| 1094 /* | |
| 1095 * Allocate a new spa_t structure. | |
| 1096 */ | |
|
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1097 spa = spa_add(pool, altroot); |
| 789 | 1098 spa_activate(spa); |
| 1099 | |
| 1100 spa->spa_uberblock.ub_txg = txg - 1; | |
| 1760 | 1101 spa->spa_uberblock.ub_version = ZFS_VERSION; |
| 789 | 1102 spa->spa_ubsync = spa->spa_uberblock; |
| 1103 | |
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1104 /* |
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1105 * Create the root vdev. |
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1106 */ |
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1107 spa_config_enter(spa, RW_WRITER, FTAG); |
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1108 |
| 2082 | 1109 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); |
| 1110 | |
| 1111 ASSERT(error != 0 || rvd != NULL); | |
| 1112 ASSERT(error != 0 || spa->spa_root_vdev == rvd); | |
| 1113 | |
| 1114 if (error == 0 && rvd->vdev_children == 0) | |
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1115 error = EINVAL; |
| 2082 | 1116 |
| 1117 if (error == 0 && | |
| 1118 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && | |
| 1119 (error = spa_validate_spares(spa, nvroot, txg, | |
| 1120 VDEV_ALLOC_ADD)) == 0) { | |
| 1121 for (c = 0; c < rvd->vdev_children; c++) | |
| 1122 vdev_init(rvd->vdev_child[c], txg); | |
| 1123 vdev_config_dirty(rvd); | |
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1124 } |
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1125 |
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1126 spa_config_exit(spa, FTAG); |
| 789 | 1127 |
| 2082 | 1128 if (error != 0) { |
| 789 | 1129 spa_unload(spa); |
| 1130 spa_deactivate(spa); | |
| 1131 spa_remove(spa); | |
| 1132 mutex_exit(&spa_namespace_lock); | |
| 1133 return (error); | |
| 1134 } | |
| 1135 | |
| 2082 | 1136 /* |
| 1137 * Get the list of spares, if specified. | |
| 1138 */ | |
| 1139 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1140 &spares, &nspares) == 0) { | |
| 1141 VERIFY(nvlist_alloc(&spa->spa_sparelist, NV_UNIQUE_NAME, | |
| 1142 KM_SLEEP) == 0); | |
| 1143 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1144 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1145 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1146 spa_load_spares(spa); | |
| 1147 spa_config_exit(spa, FTAG); | |
| 1148 spa->spa_sync_spares = B_TRUE; | |
| 1149 } | |
| 1150 | |
| 789 | 1151 spa->spa_dsl_pool = dp = dsl_pool_create(spa, txg); |
| 1152 spa->spa_meta_objset = dp->dp_meta_objset; | |
| 1153 | |
| 1154 tx = dmu_tx_create_assigned(dp, txg); | |
| 1155 | |
| 1156 /* | |
| 1157 * Create the pool config object. | |
| 1158 */ | |
| 1159 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 1160 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 1161 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 1162 | |
| 1544 | 1163 if (zap_add(spa->spa_meta_objset, |
| 789 | 1164 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, |
| 1544 | 1165 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { |
| 1166 cmn_err(CE_PANIC, "failed to add pool config"); | |
| 1167 } | |
| 789 | 1168 |
| 2082 | 1169 /* Newly created pools are always deflated. */ |
| 1170 spa->spa_deflate = TRUE; | |
| 1171 if (zap_add(spa->spa_meta_objset, | |
| 1172 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 1173 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { | |
| 1174 cmn_err(CE_PANIC, "failed to add deflate"); | |
| 1175 } | |
| 1176 | |
| 789 | 1177 /* |
| 1178 * Create the deferred-free bplist object. Turn off compression | |
| 1179 * because sync-to-convergence takes longer if the blocksize | |
| 1180 * keeps changing. | |
| 1181 */ | |
| 1182 spa->spa_sync_bplist_obj = bplist_create(spa->spa_meta_objset, | |
| 1183 1 << 14, tx); | |
| 1184 dmu_object_set_compress(spa->spa_meta_objset, spa->spa_sync_bplist_obj, | |
| 1185 ZIO_COMPRESS_OFF, tx); | |
| 1186 | |
| 1544 | 1187 if (zap_add(spa->spa_meta_objset, |
| 789 | 1188 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPLIST, |
| 1544 | 1189 sizeof (uint64_t), 1, &spa->spa_sync_bplist_obj, tx) != 0) { |
| 1190 cmn_err(CE_PANIC, "failed to add bplist"); | |
| 1191 } | |
| 789 | 1192 |
| 2926 | 1193 /* |
| 1194 * Create the pool's history object. | |
| 1195 */ | |
| 1196 spa_history_create_obj(spa, tx); | |
| 1197 | |
| 789 | 1198 dmu_tx_commit(tx); |
| 1199 | |
| 3912 | 1200 spa->spa_bootfs = zfs_prop_default_numeric(ZFS_PROP_BOOTFS); |
| 789 | 1201 spa->spa_sync_on = B_TRUE; |
| 1202 txg_sync_start(spa->spa_dsl_pool); | |
| 1203 | |
| 1204 /* | |
| 1205 * We explicitly wait for the first transaction to complete so that our | |
| 1206 * bean counters are appropriately updated. | |
| 1207 */ | |
| 1208 txg_wait_synced(spa->spa_dsl_pool, txg); | |
| 1209 | |
| 1210 spa_config_sync(); | |
| 1211 | |
| 1212 mutex_exit(&spa_namespace_lock); | |
| 1213 | |
| 1214 return (0); | |
| 1215 } | |
| 1216 | |
| 1217 /* | |
| 1218 * Import the given pool into the system. We set up the necessary spa_t and | |
| 1219 * then call spa_load() to do the dirty work. | |
| 1220 */ | |
| 1221 int | |
|
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1222 spa_import(const char *pool, nvlist_t *config, const char *altroot) |
| 789 | 1223 { |
| 1224 spa_t *spa; | |
| 1225 int error; | |
| 2082 | 1226 nvlist_t *nvroot; |
| 1227 nvlist_t **spares; | |
| 1228 uint_t nspares; | |
| 789 | 1229 |
| 1230 if (!(spa_mode & FWRITE)) | |
| 1231 return (EROFS); | |
| 1232 | |
| 1233 /* | |
| 1234 * If a pool with this name exists, return failure. | |
| 1235 */ | |
| 1236 mutex_enter(&spa_namespace_lock); | |
| 1237 if (spa_lookup(pool) != NULL) { | |
| 1238 mutex_exit(&spa_namespace_lock); | |
| 1239 return (EEXIST); | |
| 1240 } | |
| 1241 | |
| 1242 /* | |
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1243 * Create and initialize the spa structure. |
| 789 | 1244 */ |
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1245 spa = spa_add(pool, altroot); |
| 789 | 1246 spa_activate(spa); |
| 1247 | |
| 1248 /* | |
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1249 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1250 * Pass TRUE for mosconfig because the user-supplied config |
| 1251 * is actually the one to trust when doing an import. | |
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1252 */ |
| 1732 | 1253 error = spa_load(spa, config, SPA_LOAD_IMPORT, B_TRUE); |
| 789 | 1254 |
| 2082 | 1255 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1256 /* | |
| 1257 * Toss any existing sparelist, as it doesn't have any validity anymore, | |
| 1258 * and conflicts with spa_has_spare(). | |
| 1259 */ | |
| 1260 if (spa->spa_sparelist) { | |
| 1261 nvlist_free(spa->spa_sparelist); | |
| 1262 spa->spa_sparelist = NULL; | |
| 1263 spa_load_spares(spa); | |
| 1264 } | |
| 1265 | |
| 1266 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, | |
| 1267 &nvroot) == 0); | |
| 1268 if (error == 0) | |
| 1269 error = spa_validate_spares(spa, nvroot, -1ULL, | |
| 1270 VDEV_ALLOC_SPARE); | |
| 1271 spa_config_exit(spa, FTAG); | |
| 1272 | |
| 1273 if (error != 0) { | |
| 789 | 1274 spa_unload(spa); |
| 1275 spa_deactivate(spa); | |
| 1276 spa_remove(spa); | |
| 1277 mutex_exit(&spa_namespace_lock); | |
| 1278 return (error); | |
| 1279 } | |
| 1280 | |
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1281 /* |
| 2082 | 1282 * Override any spares as specified by the user, as these may have |
| 1283 * correct device names/devids, etc. | |
| 1284 */ | |
| 1285 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 1286 &spares, &nspares) == 0) { | |
| 1287 if (spa->spa_sparelist) | |
| 1288 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1289 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1290 else | |
| 1291 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1292 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1293 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1294 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1295 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 1296 spa_load_spares(spa); | |
| 1297 spa_config_exit(spa, FTAG); | |
| 1298 spa->spa_sync_spares = B_TRUE; | |
| 1299 } | |
| 1300 | |
| 1301 /* | |
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1302 * Update the config cache to include the newly-imported pool. |
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1303 */ |
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1304 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1305 |
| 789 | 1306 mutex_exit(&spa_namespace_lock); |
| 1307 | |
| 1308 /* | |
| 1309 * Resilver anything that's out of date. | |
| 1310 */ | |
| 1311 if (spa_mode & FWRITE) | |
| 1312 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1313 | |
| 1314 return (0); | |
| 1315 } | |
| 1316 | |
| 1317 /* | |
| 1318 * This (illegal) pool name is used when temporarily importing a spa_t in order | |
| 1319 * to get the vdev stats associated with the imported devices. | |
| 1320 */ | |
| 1321 #define TRYIMPORT_NAME "$import" | |
| 1322 | |
| 1323 nvlist_t * | |
| 1324 spa_tryimport(nvlist_t *tryconfig) | |
| 1325 { | |
| 1326 nvlist_t *config = NULL; | |
| 1327 char *poolname; | |
| 1328 spa_t *spa; | |
| 1329 uint64_t state; | |
| 1330 | |
| 1331 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) | |
| 1332 return (NULL); | |
| 1333 | |
| 1334 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) | |
| 1335 return (NULL); | |
| 1336 | |
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1337 /* |
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1338 * Create and initialize the spa structure. |
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1339 */ |
| 789 | 1340 mutex_enter(&spa_namespace_lock); |
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1341 spa = spa_add(TRYIMPORT_NAME, NULL); |
| 789 | 1342 spa_activate(spa); |
| 1343 | |
| 1344 /* | |
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1345 * Pass off the heavy lifting to spa_load(). |
| 1732 | 1346 * Pass TRUE for mosconfig because the user-supplied config |
| 1347 * is actually the one to trust when doing an import. | |
| 789 | 1348 */ |
| 1732 | 1349 (void) spa_load(spa, tryconfig, SPA_LOAD_TRYIMPORT, B_TRUE); |
| 789 | 1350 |
| 1351 /* | |
| 1352 * If 'tryconfig' was at least parsable, return the current config. | |
| 1353 */ | |
| 1354 if (spa->spa_root_vdev != NULL) { | |
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1355 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 1356 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); |
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1357 spa_config_exit(spa, FTAG); |
| 789 | 1358 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, |
| 1359 poolname) == 0); | |
| 1360 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, | |
| 1361 state) == 0); | |
| 2082 | 1362 |
| 1363 /* | |
| 1364 * Add the list of hot spares. | |
| 1365 */ | |
| 1366 spa_add_spares(spa, config); | |
| 789 | 1367 } |
| 1368 | |
| 1369 spa_unload(spa); | |
| 1370 spa_deactivate(spa); | |
| 1371 spa_remove(spa); | |
| 1372 mutex_exit(&spa_namespace_lock); | |
| 1373 | |
| 1374 return (config); | |
| 1375 } | |
| 1376 | |
| 1377 /* | |
| 1378 * Pool export/destroy | |
| 1379 * | |
| 1380 * The act of destroying or exporting a pool is very simple. We make sure there | |
| 1381 * is no more pending I/O and any references to the pool are gone. Then, we | |
| 1382 * update the pool state and sync all the labels to disk, removing the | |
| 1383 * configuration from the cache afterwards. | |
| 1384 */ | |
| 1385 static int | |
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1386 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig) |
| 789 | 1387 { |
| 1388 spa_t *spa; | |
| 1389 | |
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1390 if (oldconfig) |
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1391 *oldconfig = NULL; |
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1392 |
| 789 | 1393 if (!(spa_mode & FWRITE)) |
| 1394 return (EROFS); | |
| 1395 | |
| 1396 mutex_enter(&spa_namespace_lock); | |
| 1397 if ((spa = spa_lookup(pool)) == NULL) { | |
| 1398 mutex_exit(&spa_namespace_lock); | |
| 1399 return (ENOENT); | |
| 1400 } | |
| 1401 | |
| 1402 /* | |
| 1544 | 1403 * Put a hold on the pool, drop the namespace lock, stop async tasks, |
| 1404 * reacquire the namespace lock, and see if we can export. | |
| 1405 */ | |
| 1406 spa_open_ref(spa, FTAG); | |
| 1407 mutex_exit(&spa_namespace_lock); | |
| 1408 spa_async_suspend(spa); | |
| 1409 mutex_enter(&spa_namespace_lock); | |
| 1410 spa_close(spa, FTAG); | |
| 1411 | |
| 1412 /* | |
| 789 | 1413 * The pool will be in core if it's openable, |
| 1414 * in which case we can modify its state. | |
| 1415 */ | |
| 1416 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { | |
| 1417 /* | |
| 1418 * Objsets may be open only because they're dirty, so we | |
| 1419 * have to force it to sync before checking spa_refcnt. | |
| 1420 */ | |
| 1421 spa_scrub_suspend(spa); | |
| 1422 txg_wait_synced(spa->spa_dsl_pool, 0); | |
| 1423 | |
| 1544 | 1424 /* |
| 1425 * A pool cannot be exported or destroyed if there are active | |
| 1426 * references. If we are resetting a pool, allow references by | |
| 1427 * fault injection handlers. | |
| 1428 */ | |
| 1429 if (!spa_refcount_zero(spa) || | |
| 1430 (spa->spa_inject_ref != 0 && | |
| 1431 new_state != POOL_STATE_UNINITIALIZED)) { | |
| 789 | 1432 spa_scrub_resume(spa); |
| 1544 | 1433 spa_async_resume(spa); |
| 789 | 1434 mutex_exit(&spa_namespace_lock); |
| 1435 return (EBUSY); | |
| 1436 } | |
| 1437 | |
| 1438 spa_scrub_resume(spa); | |
| 1439 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); | |
| 1440 | |
| 1441 /* | |
| 1442 * We want this to be reflected on every label, | |
| 1443 * so mark them all dirty. spa_unload() will do the | |
| 1444 * final sync that pushes these changes out. | |
| 1445 */ | |
| 1544 | 1446 if (new_state != POOL_STATE_UNINITIALIZED) { |
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1447 spa_config_enter(spa, RW_WRITER, FTAG); |
| 1544 | 1448 spa->spa_state = new_state; |
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1449 spa->spa_final_txg = spa_last_synced_txg(spa) + 1; |
| 1544 | 1450 vdev_config_dirty(spa->spa_root_vdev); |
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1451 spa_config_exit(spa, FTAG); |
| 1544 | 1452 } |
| 789 | 1453 } |
| 1454 | |
| 1455 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 1456 spa_unload(spa); | |
| 1457 spa_deactivate(spa); | |
| 1458 } | |
| 1459 | |
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1460 if (oldconfig && spa->spa_config) |
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1461 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); |
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1462 |
| 1544 | 1463 if (new_state != POOL_STATE_UNINITIALIZED) { |
| 1464 spa_remove(spa); | |
| 1465 spa_config_sync(); | |
| 1466 } | |
| 789 | 1467 mutex_exit(&spa_namespace_lock); |
| 1468 | |
| 1469 return (0); | |
| 1470 } | |
| 1471 | |
| 1472 /* | |
| 1473 * Destroy a storage pool. | |
| 1474 */ | |
| 1475 int | |
| 1476 spa_destroy(char *pool) | |
| 1477 { | |
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1478 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL)); |
| 789 | 1479 } |
| 1480 | |
| 1481 /* | |
| 1482 * Export a storage pool. | |
| 1483 */ | |
| 1484 int | |
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1485 spa_export(char *pool, nvlist_t **oldconfig) |
| 789 | 1486 { |
|
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1487 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig)); |
| 789 | 1488 } |
| 1489 | |
| 1490 /* | |
| 1544 | 1491 * Similar to spa_export(), this unloads the spa_t without actually removing it |
| 1492 * from the namespace in any way. | |
| 1493 */ | |
| 1494 int | |
| 1495 spa_reset(char *pool) | |
| 1496 { | |
|
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1497 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL)); |
| 1544 | 1498 } |
| 1499 | |
| 1500 | |
| 1501 /* | |
| 789 | 1502 * ========================================================================== |
| 1503 * Device manipulation | |
| 1504 * ========================================================================== | |
| 1505 */ | |
| 1506 | |
| 1507 /* | |
| 1508 * Add capacity to a storage pool. | |
| 1509 */ | |
| 1510 int | |
| 1511 spa_vdev_add(spa_t *spa, nvlist_t *nvroot) | |
| 1512 { | |
| 1513 uint64_t txg; | |
|
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1514 int c, error; |
| 789 | 1515 vdev_t *rvd = spa->spa_root_vdev; |
|
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1516 vdev_t *vd, *tvd; |
| 2082 | 1517 nvlist_t **spares; |
| 1518 uint_t i, nspares; | |
| 789 | 1519 |
| 1520 txg = spa_vdev_enter(spa); | |
| 1521 | |
| 2082 | 1522 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, |
| 1523 VDEV_ALLOC_ADD)) != 0) | |
| 1524 return (spa_vdev_exit(spa, NULL, txg, error)); | |
| 1525 | |
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1526 spa->spa_pending_vdev = vd; |
| 789 | 1527 |
| 2082 | 1528 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, |
| 1529 &spares, &nspares) != 0) | |
| 1530 nspares = 0; | |
| 1531 | |
|
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1532 if (vd->vdev_children == 0 && nspares == 0) { |
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1533 spa->spa_pending_vdev = NULL; |
| 2082 | 1534 return (spa_vdev_exit(spa, vd, txg, EINVAL)); |
|
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1535 } |
| 2082 | 1536 |
| 1537 if (vd->vdev_children != 0) { | |
|
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1538 if ((error = vdev_create(vd, txg, B_FALSE)) != 0) { |
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1539 spa->spa_pending_vdev = NULL; |
| 2082 | 1540 return (spa_vdev_exit(spa, vd, txg, error)); |
| 1541 } | |
| 1542 } | |
| 1543 | |
|
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1544 /* |
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1545 * We must validate the spares after checking the children. Otherwise, |
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1546 * vdev_inuse() will blindly overwrite the spare. |
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1547 */ |
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1548 if ((error = spa_validate_spares(spa, nvroot, txg, |
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1549 VDEV_ALLOC_ADD)) != 0) { |
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1550 spa->spa_pending_vdev = NULL; |
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1551 return (spa_vdev_exit(spa, vd, txg, error)); |
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1552 } |
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1553 |
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1554 spa->spa_pending_vdev = NULL; |
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1555 |
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1556 /* |
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1557 * Transfer each new top-level vdev from vd to rvd. |
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1558 */ |
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1559 for (c = 0; c < vd->vdev_children; c++) { |
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1560 tvd = vd->vdev_child[c]; |
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1561 vdev_remove_child(vd, tvd); |
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1562 tvd->vdev_id = rvd->vdev_children; |
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1563 vdev_add_child(rvd, tvd); |
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1564 vdev_config_dirty(tvd); |
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1565 } |
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1566 |
| 2082 | 1567 if (nspares != 0) { |
| 1568 if (spa->spa_sparelist != NULL) { | |
| 1569 nvlist_t **oldspares; | |
| 1570 uint_t oldnspares; | |
| 1571 nvlist_t **newspares; | |
| 1572 | |
| 1573 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 1574 ZPOOL_CONFIG_SPARES, &oldspares, &oldnspares) == 0); | |
| 1575 | |
| 1576 newspares = kmem_alloc(sizeof (void *) * | |
| 1577 (nspares + oldnspares), KM_SLEEP); | |
| 1578 for (i = 0; i < oldnspares; i++) | |
| 1579 VERIFY(nvlist_dup(oldspares[i], | |
| 1580 &newspares[i], KM_SLEEP) == 0); | |
| 1581 for (i = 0; i < nspares; i++) | |
| 1582 VERIFY(nvlist_dup(spares[i], | |
| 1583 &newspares[i + oldnspares], | |
| 1584 KM_SLEEP) == 0); | |
| 1585 | |
| 1586 VERIFY(nvlist_remove(spa->spa_sparelist, | |
| 1587 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 1588 | |
| 1589 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1590 ZPOOL_CONFIG_SPARES, newspares, | |
| 1591 nspares + oldnspares) == 0); | |
| 1592 for (i = 0; i < oldnspares + nspares; i++) | |
| 1593 nvlist_free(newspares[i]); | |
| 1594 kmem_free(newspares, (oldnspares + nspares) * | |
| 1595 sizeof (void *)); | |
| 1596 } else { | |
| 1597 VERIFY(nvlist_alloc(&spa->spa_sparelist, | |
| 1598 NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 1599 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, | |
| 1600 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); | |
| 1601 } | |
| 1602 | |
| 1603 spa_load_spares(spa); | |
| 1604 spa->spa_sync_spares = B_TRUE; | |
| 789 | 1605 } |
| 1606 | |
| 1607 /* | |
|
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1608 * We have to be careful when adding new vdevs to an existing pool. |
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1609 * If other threads start allocating from these vdevs before we |
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1610 * sync the config cache, and we lose power, then upon reboot we may |
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1611 * fail to open the pool because there are DVAs that the config cache |
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1612 * can't translate. Therefore, we first add the vdevs without |
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1613 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); |
|
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1614 * and then let spa_config_update() initialize the new metaslabs. |
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1615 * |
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1616 * spa_load() checks for added-but-not-initialized vdevs, so that |
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1617 * if we lose power at any point in this sequence, the remaining |
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1618 * steps will be completed the next time we load the pool. |
| 789 | 1619 */ |
|
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1620 (void) spa_vdev_exit(spa, vd, txg, 0); |
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1621 |
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1622 mutex_enter(&spa_namespace_lock); |
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1623 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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1624 mutex_exit(&spa_namespace_lock); |
| 789 | 1625 |
|
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1626 return (0); |
| 789 | 1627 } |
| 1628 | |
| 1629 /* | |
| 1630 * Attach a device to a mirror. The arguments are the path to any device | |
| 1631 * in the mirror, and the nvroot for the new device. If the path specifies | |
| 1632 * a device that is not mirrored, we automatically insert the mirror vdev. | |
| 1633 * | |
| 1634 * If 'replacing' is specified, the new device is intended to replace the | |
| 1635 * existing device; in this case the two devices are made into their own | |
| 1636 * mirror using the 'replacing' vdev, which is functionally idendical to | |
| 1637 * the mirror vdev (it actually reuses all the same ops) but has a few | |
| 1638 * extra rules: you can't attach to it after it's been created, and upon | |
| 1639 * completion of resilvering, the first disk (the one being replaced) | |
| 1640 * is automatically detached. | |
| 1641 */ | |
| 1642 int | |
| 1544 | 1643 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) |
| 789 | 1644 { |
| 1645 uint64_t txg, open_txg; | |
| 1646 int error; | |
| 1647 vdev_t *rvd = spa->spa_root_vdev; | |
| 1648 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; | |
| 2082 | 1649 vdev_ops_t *pvops; |
| 789 | 1650 |
| 1651 txg = spa_vdev_enter(spa); | |
| 1652 | |
| 1544 | 1653 oldvd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1654 |
| 1655 if (oldvd == NULL) | |
| 1656 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1657 | |
|
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1658 if (!oldvd->vdev_ops->vdev_op_leaf) |
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1659 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1660 |
| 789 | 1661 pvd = oldvd->vdev_parent; |
| 1662 | |
| 2082 | 1663 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, |
| 1664 VDEV_ALLOC_ADD)) != 0 || newrootvd->vdev_children != 1) | |
| 789 | 1665 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); |
| 1666 | |
| 1667 newvd = newrootvd->vdev_child[0]; | |
| 1668 | |
| 1669 if (!newvd->vdev_ops->vdev_op_leaf) | |
| 1670 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); | |
| 1671 | |
| 2082 | 1672 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) |
| 789 | 1673 return (spa_vdev_exit(spa, newrootvd, txg, error)); |
| 1674 | |
| 2082 | 1675 if (!replacing) { |
| 1676 /* | |
| 1677 * For attach, the only allowable parent is a mirror or the root | |
| 1678 * vdev. | |
| 1679 */ | |
| 1680 if (pvd->vdev_ops != &vdev_mirror_ops && | |
| 1681 pvd->vdev_ops != &vdev_root_ops) | |
| 1682 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1683 | |
| 1684 pvops = &vdev_mirror_ops; | |
| 1685 } else { | |
| 1686 /* | |
| 1687 * Active hot spares can only be replaced by inactive hot | |
| 1688 * spares. | |
| 1689 */ | |
| 1690 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1691 pvd->vdev_child[1] == oldvd && | |
| 1692 !spa_has_spare(spa, newvd->vdev_guid)) | |
| 1693 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
| 1694 | |
| 1695 /* | |
| 1696 * If the source is a hot spare, and the parent isn't already a | |
| 1697 * spare, then we want to create a new hot spare. Otherwise, we | |
|
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1698 * want to create a replacing vdev. The user is not allowed to |
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1699 * attach to a spared vdev child unless the 'isspare' state is |
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1700 * the same (spare replaces spare, non-spare replaces |
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1701 * non-spare). |
| 2082 | 1702 */ |
| 1703 if (pvd->vdev_ops == &vdev_replacing_ops) | |
| 1704 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); | |
|
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1705 else if (pvd->vdev_ops == &vdev_spare_ops && |
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1706 newvd->vdev_isspare != oldvd->vdev_isspare) |
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1707 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); |
| 2082 | 1708 else if (pvd->vdev_ops != &vdev_spare_ops && |
| 1709 newvd->vdev_isspare) | |
| 1710 pvops = &vdev_spare_ops; | |
| 1711 else | |
| 1712 pvops = &vdev_replacing_ops; | |
| 1713 } | |
| 1714 | |
|
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1715 /* |
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1716 * Compare the new device size with the replaceable/attachable |
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1717 * device size. |
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1718 */ |
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1719 if (newvd->vdev_psize < vdev_get_rsize(oldvd)) |
| 789 | 1720 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); |
| 1721 | |
| 1732 | 1722 /* |
| 1723 * The new device cannot have a higher alignment requirement | |
| 1724 * than the top-level vdev. | |
| 1725 */ | |
| 1726 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) | |
| 789 | 1727 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); |
| 1728 | |
| 1729 /* | |
| 1730 * If this is an in-place replacement, update oldvd's path and devid | |
| 1731 * to make it distinguishable from newvd, and unopenable from now on. | |
| 1732 */ | |
| 1733 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { | |
| 1734 spa_strfree(oldvd->vdev_path); | |
| 1735 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, | |
| 1736 KM_SLEEP); | |
| 1737 (void) sprintf(oldvd->vdev_path, "%s/%s", | |
| 1738 newvd->vdev_path, "old"); | |
| 1739 if (oldvd->vdev_devid != NULL) { | |
| 1740 spa_strfree(oldvd->vdev_devid); | |
| 1741 oldvd->vdev_devid = NULL; | |
| 1742 } | |
| 1743 } | |
| 1744 | |
| 1745 /* | |
| 2082 | 1746 * If the parent is not a mirror, or if we're replacing, insert the new |
| 1747 * mirror/replacing/spare vdev above oldvd. | |
| 789 | 1748 */ |
| 1749 if (pvd->vdev_ops != pvops) | |
| 1750 pvd = vdev_add_parent(oldvd, pvops); | |
| 1751 | |
| 1752 ASSERT(pvd->vdev_top->vdev_parent == rvd); | |
| 1753 ASSERT(pvd->vdev_ops == pvops); | |
| 1754 ASSERT(oldvd->vdev_parent == pvd); | |
| 1755 | |
| 1756 /* | |
| 1757 * Extract the new device from its root and add it to pvd. | |
| 1758 */ | |
| 1759 vdev_remove_child(newrootvd, newvd); | |
| 1760 newvd->vdev_id = pvd->vdev_children; | |
| 1761 vdev_add_child(pvd, newvd); | |
| 1762 | |
| 1544 | 1763 /* |
| 1764 * If newvd is smaller than oldvd, but larger than its rsize, | |
| 1765 * the addition of newvd may have decreased our parent's asize. | |
| 1766 */ | |
| 1767 pvd->vdev_asize = MIN(pvd->vdev_asize, newvd->vdev_asize); | |
| 1768 | |
| 789 | 1769 tvd = newvd->vdev_top; |
| 1770 ASSERT(pvd->vdev_top == tvd); | |
| 1771 ASSERT(tvd->vdev_parent == rvd); | |
| 1772 | |
| 1773 vdev_config_dirty(tvd); | |
| 1774 | |
| 1775 /* | |
| 1776 * Set newvd's DTL to [TXG_INITIAL, open_txg]. It will propagate | |
| 1777 * upward when spa_vdev_exit() calls vdev_dtl_reassess(). | |
| 1778 */ | |
| 1779 open_txg = txg + TXG_CONCURRENT_STATES - 1; | |
| 1780 | |
| 1781 mutex_enter(&newvd->vdev_dtl_lock); | |
| 1782 space_map_add(&newvd->vdev_dtl_map, TXG_INITIAL, | |
| 1783 open_txg - TXG_INITIAL + 1); | |
| 1784 mutex_exit(&newvd->vdev_dtl_lock); | |
| 1785 | |
|
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1786 if (newvd->vdev_isspare) |
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1787 spa_spare_activate(newvd); |
| 1544 | 1788 |
| 789 | 1789 /* |
| 1790 * Mark newvd's DTL dirty in this txg. | |
| 1791 */ | |
| 1732 | 1792 vdev_dirty(tvd, VDD_DTL, newvd, txg); |
| 789 | 1793 |
| 1794 (void) spa_vdev_exit(spa, newrootvd, open_txg, 0); | |
| 1795 | |
| 1796 /* | |
| 1797 * Kick off a resilver to update newvd. | |
| 1798 */ | |
| 1799 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 1800 | |
| 1801 return (0); | |
| 1802 } | |
| 1803 | |
| 1804 /* | |
| 1805 * Detach a device from a mirror or replacing vdev. | |
| 1806 * If 'replace_done' is specified, only detach if the parent | |
| 1807 * is a replacing vdev. | |
| 1808 */ | |
| 1809 int | |
| 1544 | 1810 spa_vdev_detach(spa_t *spa, uint64_t guid, int replace_done) |
| 789 | 1811 { |
| 1812 uint64_t txg; | |
| 1813 int c, t, error; | |
| 1814 vdev_t *rvd = spa->spa_root_vdev; | |
| 1815 vdev_t *vd, *pvd, *cvd, *tvd; | |
| 2082 | 1816 boolean_t unspare = B_FALSE; |
| 1817 uint64_t unspare_guid; | |
| 789 | 1818 |
| 1819 txg = spa_vdev_enter(spa); | |
| 1820 | |
| 1544 | 1821 vd = vdev_lookup_by_guid(rvd, guid); |
| 789 | 1822 |
| 1823 if (vd == NULL) | |
| 1824 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); | |
| 1825 | |
|
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1826 if (!vd->vdev_ops->vdev_op_leaf) |
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1827 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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1828 |
| 789 | 1829 pvd = vd->vdev_parent; |
| 1830 | |
| 1831 /* | |
| 1832 * If replace_done is specified, only remove this device if it's | |
| 2082 | 1833 * the first child of a replacing vdev. For the 'spare' vdev, either |
| 1834 * disk can be removed. | |
| 789 | 1835 */ |
| 2082 | 1836 if (replace_done) { |
| 1837 if (pvd->vdev_ops == &vdev_replacing_ops) { | |
| 1838 if (vd->vdev_id != 0) | |
| 1839 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1840 } else if (pvd->vdev_ops != &vdev_spare_ops) { | |
| 1841 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); | |
| 1842 } | |
| 1843 } | |
| 1844 | |
| 1845 ASSERT(pvd->vdev_ops != &vdev_spare_ops || | |
| 1846 spa_version(spa) >= ZFS_VERSION_SPARES); | |
| 789 | 1847 |
| 1848 /* | |
| 2082 | 1849 * Only mirror, replacing, and spare vdevs support detach. |
| 789 | 1850 */ |
| 1851 if (pvd->vdev_ops != &vdev_replacing_ops && | |
| 2082 | 1852 pvd->vdev_ops != &vdev_mirror_ops && |
| 1853 pvd->vdev_ops != &vdev_spare_ops) | |
| 789 | 1854 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
| 1855 | |
| 1856 /* | |
| 1857 * If there's only one replica, you can't detach it. | |
| 1858 */ | |
| 1859 if (pvd->vdev_children <= 1) | |
| 1860 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); | |
| 1861 | |
| 1862 /* | |
| 1863 * If all siblings have non-empty DTLs, this device may have the only | |
| 1864 * valid copy of the data, which means we cannot safely detach it. | |
| 1865 * | |
| 1866 * XXX -- as in the vdev_offline() case, we really want a more | |
| 1867 * precise DTL check. | |
| 1868 */ | |
| 1869 for (c = 0; c < pvd->vdev_children; c++) { | |
| 1870 uint64_t dirty; | |
| 1871 | |
| 1872 cvd = pvd->vdev_child[c]; | |
| 1873 if (cvd == vd) | |
| 1874 continue; | |
| 1875 if (vdev_is_dead(cvd)) | |
| 1876 continue; | |
| 1877 mutex_enter(&cvd->vdev_dtl_lock); | |
| 1878 dirty = cvd->vdev_dtl_map.sm_space | | |
| 1879 cvd->vdev_dtl_scrub.sm_space; | |
| 1880 mutex_exit(&cvd->vdev_dtl_lock); | |
| 1881 if (!dirty) | |
| 1882 break; | |
| 1883 } | |
| 2082 | 1884 |
| 1885 /* | |
| 1886 * If we are a replacing or spare vdev, then we can always detach the | |
| 1887 * latter child, as that is how one cancels the operation. | |
| 1888 */ | |
| 1889 if ((pvd->vdev_ops == &vdev_mirror_ops || vd->vdev_id != 1) && | |
| 1890 c == pvd->vdev_children) | |
| 789 | 1891 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); |
| 1892 | |
| 1893 /* | |
| 2082 | 1894 * If we are detaching the original disk from a spare, then it implies |
| 1895 * that the spare should become a real disk, and be removed from the | |
| 1896 * active spare list for the pool. | |
| 1897 */ | |
| 1898 if (pvd->vdev_ops == &vdev_spare_ops && | |
| 1899 vd->vdev_id == 0) | |
| 1900 unspare = B_TRUE; | |
| 1901 | |
| 1902 /* | |
| 789 | 1903 * Erase the disk labels so the disk can be used for other things. |
| 1904 * This must be done after all other error cases are handled, | |
| 1905 * but before we disembowel vd (so we can still do I/O to it). | |
| 1906 * But if we can't do it, don't treat the error as fatal -- | |
| 1907 * it may be that the unwritability of the disk is the reason | |
| 1908 * it's being detached! | |
| 1909 */ | |
|
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1910 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); |
| 789 | 1911 |
| 1912 /* | |
| 1913 * Remove vd from its parent and compact the parent's children. | |
| 1914 */ | |
| 1915 vdev_remove_child(pvd, vd); | |
| 1916 vdev_compact_children(pvd); | |
| 1917 | |
| 1918 /* | |
| 1919 * Remember one of the remaining children so we can get tvd below. | |
| 1920 */ | |
| 1921 cvd = pvd->vdev_child[0]; | |
| 1922 | |
| 1923 /* | |
| 2082 | 1924 * If we need to remove the remaining child from the list of hot spares, |
| 1925 * do it now, marking the vdev as no longer a spare in the process. We | |
| 1926 * must do this before vdev_remove_parent(), because that can change the | |
| 1927 * GUID if it creates a new toplevel GUID. | |
| 1928 */ | |
| 1929 if (unspare) { | |
| 1930 ASSERT(cvd->vdev_isspare); | |
|
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1931 spa_spare_remove(cvd); |
| 2082 | 1932 unspare_guid = cvd->vdev_guid; |
| 1933 } | |
| 1934 | |
| 1935 /* | |
| 789 | 1936 * If the parent mirror/replacing vdev only has one child, |
| 1937 * the parent is no longer needed. Remove it from the tree. | |
| 1938 */ | |
| 1939 if (pvd->vdev_children == 1) | |
| 1940 vdev_remove_parent(cvd); | |
| 1941 | |
| 1942 /* | |
| 1943 * We don't set tvd until now because the parent we just removed | |
| 1944 * may have been the previous top-level vdev. | |
| 1945 */ | |
| 1946 tvd = cvd->vdev_top; | |
| 1947 ASSERT(tvd->vdev_parent == rvd); | |
| 1948 | |
| 1949 /* | |
|
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1950 * Reevaluate the parent vdev state. |
| 789 | 1951 */ |
|
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1952 vdev_propagate_state(cvd->vdev_parent); |
| 789 | 1953 |
| 1954 /* | |
|
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1955 * If the device we just detached was smaller than the others, it may be |
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1956 * possible to add metaslabs (i.e. grow the pool). vdev_metaslab_init() |
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1957 * can't fail because the existing metaslabs are already in core, so |
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1958 * there's nothing to read from disk. |
| 789 | 1959 */ |
| 1732 | 1960 VERIFY(vdev_metaslab_init(tvd, txg) == 0); |
| 789 | 1961 |
| 1962 vdev_config_dirty(tvd); | |
| 1963 | |
| 1964 /* | |
|
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1965 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that |
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1966 * vd->vdev_detached is set and free vd's DTL object in syncing context. |
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1967 * But first make sure we're not on any *other* txg's DTL list, to |
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1968 * prevent vd from being accessed after it's freed. |
| 789 | 1969 */ |
| 1970 for (t = 0; t < TXG_SIZE; t++) | |
| 1971 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); | |
| 1732 | 1972 vd->vdev_detached = B_TRUE; |
| 1973 vdev_dirty(tvd, VDD_DTL, vd, txg); | |
| 789 | 1974 |
| 2082 | 1975 error = spa_vdev_exit(spa, vd, txg, 0); |
| 1976 | |
| 1977 /* | |
|
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1978 * If this was the removal of the original device in a hot spare vdev, |
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1979 * then we want to go through and remove the device from the hot spare |
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1980 * list of every other pool. |
| 2082 | 1981 */ |
| 1982 if (unspare) { | |
| 1983 spa = NULL; | |
| 1984 mutex_enter(&spa_namespace_lock); | |
| 1985 while ((spa = spa_next(spa)) != NULL) { | |
| 1986 if (spa->spa_state != POOL_STATE_ACTIVE) | |
| 1987 continue; | |
| 1988 | |
| 1989 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); | |
| 1990 } | |
| 1991 mutex_exit(&spa_namespace_lock); | |
| 1992 } | |
| 1993 | |
| 1994 return (error); | |
| 1995 } | |
| 1996 | |
| 1997 /* | |
| 1998 * Remove a device from the pool. Currently, this supports removing only hot | |
| 1999 * spares. | |
| 2000 */ | |
| 2001 int | |
| 2002 spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) | |
| 2003 { | |
| 2004 vdev_t *vd; | |
| 2005 nvlist_t **spares, *nv, **newspares; | |
| 2006 uint_t i, j, nspares; | |
| 2007 int ret = 0; | |
| 2008 | |
| 2009 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2010 | |
| 2011 vd = spa_lookup_by_guid(spa, guid); | |
| 2012 | |
| 2013 nv = NULL; | |
| 2014 if (spa->spa_spares != NULL && | |
| 2015 nvlist_lookup_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 2016 &spares, &nspares) == 0) { | |
| 2017 for (i = 0; i < nspares; i++) { | |
| 2018 uint64_t theguid; | |
| 2019 | |
| 2020 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 2021 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 2022 if (theguid == guid) { | |
| 2023 nv = spares[i]; | |
| 2024 break; | |
| 2025 } | |
| 2026 } | |
| 2027 } | |
| 2028 | |
| 2029 /* | |
| 2030 * We only support removing a hot spare, and only if it's not currently | |
| 2031 * in use in this pool. | |
| 2032 */ | |
| 2033 if (nv == NULL && vd == NULL) { | |
| 2034 ret = ENOENT; | |
| 2035 goto out; | |
| 2036 } | |
| 2037 | |
| 2038 if (nv == NULL && vd != NULL) { | |
| 2039 ret = ENOTSUP; | |
| 2040 goto out; | |
| 2041 } | |
| 2042 | |
| 2043 if (!unspare && nv != NULL && vd != NULL) { | |
| 2044 ret = EBUSY; | |
| 2045 goto out; | |
| 2046 } | |
| 2047 | |
| 2048 if (nspares == 1) { | |
| 2049 newspares = NULL; | |
| 2050 } else { | |
| 2051 newspares = kmem_alloc((nspares - 1) * sizeof (void *), | |
| 2052 KM_SLEEP); | |
| 2053 for (i = 0, j = 0; i < nspares; i++) { | |
| 2054 if (spares[i] != nv) | |
| 2055 VERIFY(nvlist_dup(spares[i], | |
| 2056 &newspares[j++], KM_SLEEP) == 0); | |
| 2057 } | |
| 2058 } | |
| 2059 | |
| 2060 VERIFY(nvlist_remove(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 2061 DATA_TYPE_NVLIST_ARRAY) == 0); | |
| 2062 VERIFY(nvlist_add_nvlist_array(spa->spa_sparelist, ZPOOL_CONFIG_SPARES, | |
| 2063 newspares, nspares - 1) == 0); | |
| 2064 for (i = 0; i < nspares - 1; i++) | |
| 2065 nvlist_free(newspares[i]); | |
| 2066 kmem_free(newspares, (nspares - 1) * sizeof (void *)); | |
| 2067 spa_load_spares(spa); | |
| 2068 spa->spa_sync_spares = B_TRUE; | |
| 2069 | |
| 2070 out: | |
| 2071 spa_config_exit(spa, FTAG); | |
| 2072 | |
| 2073 return (ret); | |
| 789 | 2074 } |
| 2075 | |
| 2076 /* | |
| 1544 | 2077 * Find any device that's done replacing, so we can detach it. |
| 789 | 2078 */ |
| 1544 | 2079 static vdev_t * |
| 2080 spa_vdev_replace_done_hunt(vdev_t *vd) | |
| 789 | 2081 { |
| 1544 | 2082 vdev_t *newvd, *oldvd; |
| 789 | 2083 int c; |
| 2084 | |
| 1544 | 2085 for (c = 0; c < vd->vdev_children; c++) { |
| 2086 oldvd = spa_vdev_replace_done_hunt(vd->vdev_child[c]); | |
| 2087 if (oldvd != NULL) | |
| 2088 return (oldvd); | |
| 2089 } | |
| 789 | 2090 |
| 2091 if (vd->vdev_ops == &vdev_replacing_ops && vd->vdev_children == 2) { | |
| 1544 | 2092 oldvd = vd->vdev_child[0]; |
| 2093 newvd = vd->vdev_child[1]; | |
| 789 | 2094 |
| 1544 | 2095 mutex_enter(&newvd->vdev_dtl_lock); |
| 2096 if (newvd->vdev_dtl_map.sm_space == 0 && | |
| 2097 newvd->vdev_dtl_scrub.sm_space == 0) { | |
| 2098 mutex_exit(&newvd->vdev_dtl_lock); | |
| 2099 return (oldvd); | |
| 2100 } | |
| 2101 mutex_exit(&newvd->vdev_dtl_lock); | |
| 2102 } | |
| 789 | 2103 |
| 1544 | 2104 return (NULL); |
| 789 | 2105 } |
| 2106 | |
| 1544 | 2107 static void |
| 789 | 2108 spa_vdev_replace_done(spa_t *spa) |
| 2109 { | |
| 1544 | 2110 vdev_t *vd; |
| 2082 | 2111 vdev_t *pvd; |
| 1544 | 2112 uint64_t guid; |
| 2082 | 2113 uint64_t pguid = 0; |
| 789 | 2114 |
| 1544 | 2115 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2116 |
| 1544 | 2117 while ((vd = spa_vdev_replace_done_hunt(spa->spa_root_vdev)) != NULL) { |
| 2118 guid = vd->vdev_guid; | |
| 2082 | 2119 /* |
| 2120 * If we have just finished replacing a hot spared device, then | |
| 2121 * we need to detach the parent's first child (the original hot | |
| 2122 * spare) as well. | |
| 2123 */ | |
| 2124 pvd = vd->vdev_parent; | |
| 2125 if (pvd->vdev_parent->vdev_ops == &vdev_spare_ops && | |
| 2126 pvd->vdev_id == 0) { | |
| 2127 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); | |
| 2128 ASSERT(pvd->vdev_parent->vdev_children == 2); | |
| 2129 pguid = pvd->vdev_parent->vdev_child[1]->vdev_guid; | |
| 2130 } | |
| 1544 | 2131 spa_config_exit(spa, FTAG); |
| 2132 if (spa_vdev_detach(spa, guid, B_TRUE) != 0) | |
| 2133 return; | |
| 2082 | 2134 if (pguid != 0 && spa_vdev_detach(spa, pguid, B_TRUE) != 0) |
| 2135 return; | |
| 1544 | 2136 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2137 } |
| 2138 | |
| 1544 | 2139 spa_config_exit(spa, FTAG); |
| 789 | 2140 } |
| 2141 | |
| 2142 /* | |
|
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2143 * Update the stored path for this vdev. Dirty the vdev configuration, relying |
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2144 * on spa_vdev_enter/exit() to synchronize the labels and cache. |
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2145 */ |
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2146 int |
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2147 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) |
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2148 { |
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2149 vdev_t *rvd, *vd; |
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2150 uint64_t txg; |
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2151 |
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2152 rvd = spa->spa_root_vdev; |
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2153 |
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2154 txg = spa_vdev_enter(spa); |
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2155 |
| 2082 | 2156 if ((vd = vdev_lookup_by_guid(rvd, guid)) == NULL) { |
| 2157 /* | |
| 2158 * Determine if this is a reference to a hot spare. In that | |
| 2159 * case, update the path as stored in the spare list. | |
| 2160 */ | |
| 2161 nvlist_t **spares; | |
| 2162 uint_t i, nspares; | |
| 2163 if (spa->spa_sparelist != NULL) { | |
| 2164 VERIFY(nvlist_lookup_nvlist_array(spa->spa_sparelist, | |
| 2165 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); | |
| 2166 for (i = 0; i < nspares; i++) { | |
| 2167 uint64_t theguid; | |
| 2168 VERIFY(nvlist_lookup_uint64(spares[i], | |
| 2169 ZPOOL_CONFIG_GUID, &theguid) == 0); | |
| 2170 if (theguid == guid) | |
| 2171 break; | |
| 2172 } | |
| 2173 | |
| 2174 if (i == nspares) | |
| 2175 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2176 | |
| 2177 VERIFY(nvlist_add_string(spares[i], | |
| 2178 ZPOOL_CONFIG_PATH, newpath) == 0); | |
| 2179 spa_load_spares(spa); | |
| 2180 spa->spa_sync_spares = B_TRUE; | |
| 2181 return (spa_vdev_exit(spa, NULL, txg, 0)); | |
| 2182 } else { | |
| 2183 return (spa_vdev_exit(spa, NULL, txg, ENOENT)); | |
| 2184 } | |
| 2185 } | |
|
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2186 |
|
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2187 if (!vd->vdev_ops->vdev_op_leaf) |
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2188 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); |
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2189 |
|
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2190 spa_strfree(vd->vdev_path); |
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2191 vd->vdev_path = spa_strdup(newpath); |
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2192 |
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2193 vdev_config_dirty(vd->vdev_top); |
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2194 |
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2195 return (spa_vdev_exit(spa, NULL, txg, 0)); |
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2196 } |
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2197 |
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2198 /* |
| 789 | 2199 * ========================================================================== |
| 2200 * SPA Scrubbing | |
| 2201 * ========================================================================== | |
| 2202 */ | |
| 2203 | |
| 2204 static void | |
| 2205 spa_scrub_io_done(zio_t *zio) | |
| 2206 { | |
| 2207 spa_t *spa = zio->io_spa; | |
| 2208 | |
| 3290 | 2209 zio_data_buf_free(zio->io_data, zio->io_size); |
| 789 | 2210 |
| 2211 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2212 if (zio->io_error && !(zio->io_flags & ZIO_FLAG_SPECULATIVE)) { |
|
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2213 vdev_t *vd = zio->io_vd ? zio->io_vd : spa->spa_root_vdev; |
| 789 | 2214 spa->spa_scrub_errors++; |
| 2215 mutex_enter(&vd->vdev_stat_lock); | |
| 2216 vd->vdev_stat.vs_scrub_errors++; | |
| 2217 mutex_exit(&vd->vdev_stat_lock); | |
| 2218 } | |
|
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2219 |
|
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2220 if (--spa->spa_scrub_inflight < spa->spa_scrub_maxinflight) |
| 1544 | 2221 cv_broadcast(&spa->spa_scrub_io_cv); |
|
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2222 |
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2223 ASSERT(spa->spa_scrub_inflight >= 0); |
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2224 |
| 1544 | 2225 mutex_exit(&spa->spa_scrub_lock); |
| 789 | 2226 } |
| 2227 | |
| 2228 static void | |
| 1544 | 2229 spa_scrub_io_start(spa_t *spa, blkptr_t *bp, int priority, int flags, |
| 2230 zbookmark_t *zb) | |
| 789 | 2231 { |
| 2232 size_t size = BP_GET_LSIZE(bp); | |
|
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2233 void *data; |
| 789 | 2234 |
| 2235 mutex_enter(&spa->spa_scrub_lock); | |
|
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2236 /* |
|
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2237 * Do not give too much work to vdev(s). |
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2238 */ |
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2239 while (spa->spa_scrub_inflight >= spa->spa_scrub_maxinflight) { |
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2240 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); |
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2241 } |
| 789 | 2242 spa->spa_scrub_inflight++; |
| 2243 mutex_exit(&spa->spa_scrub_lock); | |
| 2244 | |
|
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2245 data = zio_data_buf_alloc(size); |
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2246 |
| 1544 | 2247 if (zb->zb_level == -1 && BP_GET_TYPE(bp) != DMU_OT_OBJSET) |
| 2248 flags |= ZIO_FLAG_SPECULATIVE; /* intent log block */ | |
| 2249 | |
|
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2250 flags |= ZIO_FLAG_SCRUB_THREAD | ZIO_FLAG_CANFAIL; |
| 1544 | 2251 |
| 789 | 2252 zio_nowait(zio_read(NULL, spa, bp, data, size, |
| 1544 | 2253 spa_scrub_io_done, NULL, priority, flags, zb)); |
| 789 | 2254 } |
| 2255 | |
| 2256 /* ARGSUSED */ | |
| 2257 static int | |
| 2258 spa_scrub_cb(traverse_blk_cache_t *bc, spa_t *spa, void *a) | |
| 2259 { | |
| 2260 blkptr_t *bp = &bc->bc_blkptr; | |
|
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2261 vdev_t *vd = spa->spa_root_vdev; |
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2262 dva_t *dva = bp->blk_dva; |
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2263 int needs_resilver = B_FALSE; |
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2264 int d; |
| 789 | 2265 |
|
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2266 if (bc->bc_errno) { |
| 789 | 2267 /* |
| 2268 * We can't scrub this block, but we can continue to scrub | |
| 2269 * the rest of the pool. Note the error and move along. | |
| 2270 */ | |
| 2271 mutex_enter(&spa->spa_scrub_lock); | |
| 2272 spa->spa_scrub_errors++; | |
| 2273 mutex_exit(&spa->spa_scrub_lock); | |
| 2274 | |
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2275 mutex_enter(&vd->vdev_stat_lock); |
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2276 vd->vdev_stat.vs_scrub_errors++; |
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2277 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2278 |
| 2279 return (ERESTART); | |
| 2280 } | |
| 2281 | |
| 2282 ASSERT(bp->blk_birth < spa->spa_scrub_maxtxg); | |
| 2283 | |
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2284 for (d = 0; d < BP_GET_NDVAS(bp); d++) { |
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2285 vd = vdev_lookup_top(spa, DVA_GET_VDEV(&dva[d])); |
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2286 |
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2287 ASSERT(vd != NULL); |
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2288 |
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2289 /* |
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2290 * Keep track of how much data we've examined so that |
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2291 * zpool(1M) status can make useful progress reports. |
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2292 */ |
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2293 mutex_enter(&vd->vdev_stat_lock); |
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2294 vd->vdev_stat.vs_scrub_examined += DVA_GET_ASIZE(&dva[d]); |
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2295 mutex_exit(&vd->vdev_stat_lock); |
| 789 | 2296 |
|
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2297 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER) { |
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2298 if (DVA_GET_GANG(&dva[d])) { |
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2299 /* |
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2300 * Gang members may be spread across multiple |
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2301 * vdevs, so the best we can do is look at the |
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2302 * pool-wide DTL. |
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2303 * XXX -- it would be better to change our |
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2304 * allocation policy to ensure that this can't |
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2305 * happen. |
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2306 */ |
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2307 vd = spa->spa_root_vdev; |
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2308 } |
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2309 if (vdev_dtl_contains(&vd->vdev_dtl_map, |
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2310 bp->blk_birth, 1)) |
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2311 needs_resilver = B_TRUE; |
| 789 | 2312 } |
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2313 } |
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2314 |
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2315 if (spa->spa_scrub_type == POOL_SCRUB_EVERYTHING) |
| 789 | 2316 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_SCRUB, |
| 1544 | 2317 ZIO_FLAG_SCRUB, &bc->bc_bookmark); |
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2318 else if (needs_resilver) |
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2319 spa_scrub_io_start(spa, bp, ZIO_PRIORITY_RESILVER, |
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2320 ZIO_FLAG_RESILVER, &bc->bc_bookmark); |
| 789 | 2321 |
| 2322 return (0); | |
| 2323 } | |
| 2324 | |
| 2325 static void | |
| 2326 spa_scrub_thread(spa_t *spa) | |
| 2327 { | |
| 2328 callb_cpr_t cprinfo; | |
| 2329 traverse_handle_t *th = spa->spa_scrub_th; | |
| 2330 vdev_t *rvd = spa->spa_root_vdev; | |
| 2331 pool_scrub_type_t scrub_type = spa->spa_scrub_type; | |
| 2332 int error = 0; | |
| 2333 boolean_t complete; | |
| 2334 | |
| 2335 CALLB_CPR_INIT(&cprinfo, &spa->spa_scrub_lock, callb_generic_cpr, FTAG); | |
| 2336 | |
|
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2337 /* |
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2338 * If we're restarting due to a snapshot create/delete, |
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2339 * wait for that to complete. |
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2340 */ |
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2341 txg_wait_synced(spa_get_dsl(spa), 0); |
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2342 |
| 1544 | 2343 dprintf("start %s mintxg=%llu maxtxg=%llu\n", |
| 2344 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 2345 spa->spa_scrub_mintxg, spa->spa_scrub_maxtxg); | |
| 2346 | |
| 2347 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2348 vdev_reopen(rvd); /* purge all vdev caches */ | |
| 789 | 2349 vdev_config_dirty(rvd); /* rewrite all disk labels */ |
| 2350 vdev_scrub_stat_update(rvd, scrub_type, B_FALSE); | |
| 1544 | 2351 spa_config_exit(spa, FTAG); |
| 789 | 2352 |
| 2353 mutex_enter(&spa->spa_scrub_lock); | |
| 2354 spa->spa_scrub_errors = 0; | |
| 2355 spa->spa_scrub_active = 1; | |
| 1544 | 2356 ASSERT(spa->spa_scrub_inflight == 0); |
| 789 | 2357 |
| 2358 while (!spa->spa_scrub_stop) { | |
| 2359 CALLB_CPR_SAFE_BEGIN(&cprinfo); | |
| 1544 | 2360 while (spa->spa_scrub_suspended) { |
| 789 | 2361 spa->spa_scrub_active = 0; |
| 2362 cv_broadcast(&spa->spa_scrub_cv); | |
| 2363 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2364 spa->spa_scrub_active = 1; | |
| 2365 } | |
| 2366 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_scrub_lock); | |
| 2367 | |
| 2368 if (spa->spa_scrub_restart_txg != 0) | |
| 2369 break; | |
| 2370 | |
| 2371 mutex_exit(&spa->spa_scrub_lock); | |
| 2372 error = traverse_more(th); | |
| 2373 mutex_enter(&spa->spa_scrub_lock); | |
| 2374 if (error != EAGAIN) | |
| 2375 break; | |
| 2376 } | |
| 2377 | |
| 2378 while (spa->spa_scrub_inflight) | |
| 2379 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2380 | |
|
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2381 spa->spa_scrub_active = 0; |
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2382 cv_broadcast(&spa->spa_scrub_cv); |
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2383 |
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2384 mutex_exit(&spa->spa_scrub_lock); |
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2385 |
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2386 spa_config_enter(spa, RW_WRITER, FTAG); |
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2387 |
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2388 mutex_enter(&spa->spa_scrub_lock); |
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2389 |
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2390 /* |
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2391 * Note: we check spa_scrub_restart_txg under both spa_scrub_lock |
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2392 * AND the spa config lock to synchronize with any config changes |
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2393 * that revise the DTLs under spa_vdev_enter() / spa_vdev_exit(). |
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2394 */ |
| 789 | 2395 if (spa->spa_scrub_restart_txg != 0) |
| 2396 error = ERESTART; | |
| 2397 | |
| 1544 | 2398 if (spa->spa_scrub_stop) |
| 2399 error = EINTR; | |
| 2400 | |
| 789 | 2401 /* |
| 1544 | 2402 * Even if there were uncorrectable errors, we consider the scrub |
| 2403 * completed. The downside is that if there is a transient error during | |
| 2404 * a resilver, we won't resilver the data properly to the target. But | |
| 2405 * if the damage is permanent (more likely) we will resilver forever, | |
| 2406 * which isn't really acceptable. Since there is enough information for | |
| 2407 * the user to know what has failed and why, this seems like a more | |
| 2408 * tractable approach. | |
| 789 | 2409 */ |
| 1544 | 2410 complete = (error == 0); |
| 789 | 2411 |
| 1544 | 2412 dprintf("end %s to maxtxg=%llu %s, traverse=%d, %llu errors, stop=%u\n", |
| 2413 scrub_type == POOL_SCRUB_RESILVER ? "resilver" : "scrub", | |
| 789 | 2414 spa->spa_scrub_maxtxg, complete ? "done" : "FAILED", |
| 2415 error, spa->spa_scrub_errors, spa->spa_scrub_stop); | |
| 2416 | |
| 2417 mutex_exit(&spa->spa_scrub_lock); | |
| 2418 | |
| 2419 /* | |
| 2420 * If the scrub/resilver completed, update all DTLs to reflect this. | |
| 2421 * Whether it succeeded or not, vacate all temporary scrub DTLs. | |
| 2422 */ | |
| 2423 vdev_dtl_reassess(rvd, spa_last_synced_txg(spa) + 1, | |
| 2424 complete ? spa->spa_scrub_maxtxg : 0, B_TRUE); | |
| 2425 vdev_scrub_stat_update(rvd, POOL_SCRUB_NONE, complete); | |
| 1544 | 2426 spa_errlog_rotate(spa); |
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2427 |
| 1544 | 2428 spa_config_exit(spa, FTAG); |
| 789 | 2429 |
| 2430 mutex_enter(&spa->spa_scrub_lock); | |
| 2431 | |
| 1544 | 2432 /* |
| 2433 * We may have finished replacing a device. | |
| 2434 * Let the async thread assess this and handle the detach. | |
| 2435 */ | |
| 2436 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); | |
| 789 | 2437 |
| 2438 /* | |
| 2439 * If we were told to restart, our final act is to start a new scrub. | |
| 2440 */ | |
| 2441 if (error == ERESTART) | |
| 1544 | 2442 spa_async_request(spa, scrub_type == POOL_SCRUB_RESILVER ? |
| 2443 SPA_ASYNC_RESILVER : SPA_ASYNC_SCRUB); | |
| 789 | 2444 |
| 1544 | 2445 spa->spa_scrub_type = POOL_SCRUB_NONE; |
| 2446 spa->spa_scrub_active = 0; | |
| 2447 spa->spa_scrub_thread = NULL; | |
| 2448 cv_broadcast(&spa->spa_scrub_cv); | |
| 789 | 2449 CALLB_CPR_EXIT(&cprinfo); /* drops &spa->spa_scrub_lock */ |
| 2450 thread_exit(); | |
| 2451 } | |
| 2452 | |
| 2453 void | |
| 2454 spa_scrub_suspend(spa_t *spa) | |
| 2455 { | |
| 2456 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2457 spa->spa_scrub_suspended++; |
| 789 | 2458 while (spa->spa_scrub_active) { |
| 2459 cv_broadcast(&spa->spa_scrub_cv); | |
| 2460 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2461 } | |
| 2462 while (spa->spa_scrub_inflight) | |
| 2463 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); | |
| 2464 mutex_exit(&spa->spa_scrub_lock); | |
| 2465 } | |
| 2466 | |
| 2467 void | |
| 2468 spa_scrub_resume(spa_t *spa) | |
| 2469 { | |
| 2470 mutex_enter(&spa->spa_scrub_lock); | |
| 1544 | 2471 ASSERT(spa->spa_scrub_suspended != 0); |
| 2472 if (--spa->spa_scrub_suspended == 0) | |
| 789 | 2473 cv_broadcast(&spa->spa_scrub_cv); |
| 2474 mutex_exit(&spa->spa_scrub_lock); | |
| 2475 } | |
| 2476 | |
| 2477 void | |
| 2478 spa_scrub_restart(spa_t *spa, uint64_t txg) | |
| 2479 { | |
| 2480 /* | |
| 2481 * Something happened (e.g. snapshot create/delete) that means | |
| 2482 * we must restart any in-progress scrubs. The itinerary will | |
| 2483 * fix this properly. | |
| 2484 */ | |
| 2485 mutex_enter(&spa->spa_scrub_lock); | |
| 2486 spa->spa_scrub_restart_txg = txg; | |
| 2487 mutex_exit(&spa->spa_scrub_lock); | |
| 2488 } | |
| 2489 | |
| 1544 | 2490 int |
| 2491 spa_scrub(spa_t *spa, pool_scrub_type_t type, boolean_t force) | |
| 789 | 2492 { |
| 2493 space_seg_t *ss; | |
| 2494 uint64_t mintxg, maxtxg; | |
| 2495 vdev_t *rvd = spa->spa_root_vdev; | |
| 2496 | |
| 2497 if ((uint_t)type >= POOL_SCRUB_TYPES) | |
| 2498 return (ENOTSUP); | |
| 2499 | |
| 1544 | 2500 mutex_enter(&spa->spa_scrub_lock); |
| 2501 | |
| 789 | 2502 /* |
| 2503 * If there's a scrub or resilver already in progress, stop it. | |
| 2504 */ | |
| 2505 while (spa->spa_scrub_thread != NULL) { | |
| 2506 /* | |
| 2507 * Don't stop a resilver unless forced. | |
| 2508 */ | |
| 1544 | 2509 if (spa->spa_scrub_type == POOL_SCRUB_RESILVER && !force) { |
| 2510 mutex_exit(&spa->spa_scrub_lock); | |
| 789 | 2511 return (EBUSY); |
| 1544 | 2512 } |
| 789 | 2513 spa->spa_scrub_stop = 1; |
| 2514 cv_broadcast(&spa->spa_scrub_cv); | |
| 2515 cv_wait(&spa->spa_scrub_cv, &spa->spa_scrub_lock); | |
| 2516 } | |
| 2517 | |
| 2518 /* | |
| 2519 * Terminate the previous traverse. | |
| 2520 */ | |
| 2521 if (spa->spa_scrub_th != NULL) { | |
| 2522 traverse_fini(spa->spa_scrub_th); | |
| 2523 spa->spa_scrub_th = NULL; | |
| 2524 } | |
| 2525 | |
| 1544 | 2526 if (rvd == NULL) { |
| 2527 ASSERT(spa->spa_scrub_stop == 0); | |
| 2528 ASSERT(spa->spa_scrub_type == type); | |
| 2529 ASSERT(spa->spa_scrub_restart_txg == 0); | |
| 2530 mutex_exit(&spa->spa_scrub_lock); | |
| 2531 return (0); | |
| 2532 } | |
| 789 | 2533 |
| 2534 mintxg = TXG_INITIAL - 1; | |
| 2535 maxtxg = spa_last_synced_txg(spa) + 1; | |
| 2536 | |
| 1544 | 2537 mutex_enter(&rvd->vdev_dtl_lock); |
| 789 | 2538 |
| 1544 | 2539 if (rvd->vdev_dtl_map.sm_space == 0) { |
| 2540 /* | |
| 2541 * The pool-wide DTL is empty. | |
| 1732 | 2542 * If this is a resilver, there's nothing to do except |
| 2543 * check whether any in-progress replacements have completed. | |
| 1544 | 2544 */ |
| 1732 | 2545 if (type == POOL_SCRUB_RESILVER) { |
| 1544 | 2546 type = POOL_SCRUB_NONE; |
| 1732 | 2547 spa_async_request(spa, SPA_ASYNC_REPLACE_DONE); |
| 2548 } | |
| 1544 | 2549 } else { |
| 2550 /* | |
| 2551 * The pool-wide DTL is non-empty. | |
| 2552 * If this is a normal scrub, upgrade to a resilver instead. | |
| 2553 */ | |
| 2554 if (type == POOL_SCRUB_EVERYTHING) | |
| 2555 type = POOL_SCRUB_RESILVER; | |
| 2556 } | |
| 789 | 2557 |
| 1544 | 2558 if (type == POOL_SCRUB_RESILVER) { |
| 789 | 2559 /* |
| 2560 * Determine the resilvering boundaries. | |
| 2561 * | |
| 2562 * Note: (mintxg, maxtxg) is an open interval, | |
| 2563 * i.e. mintxg and maxtxg themselves are not included. | |
| 2564 * | |
| 2565 * Note: for maxtxg, we MIN with spa_last_synced_txg(spa) + 1 | |
| 2566 * so we don't claim to resilver a txg that's still changing. | |
| 2567 */ | |
| 2568 ss = avl_first(&rvd->vdev_dtl_map.sm_root); | |
| 1544 | 2569 mintxg = ss->ss_start - 1; |
| 789 | 2570 ss = avl_last(&rvd->vdev_dtl_map.sm_root); |
| 1544 | 2571 maxtxg = MIN(ss->ss_end, maxtxg); |
| 789 | 2572 } |
| 2573 | |
| 1544 | 2574 mutex_exit(&rvd->vdev_dtl_lock); |
| 2575 | |
| 2576 spa->spa_scrub_stop = 0; | |
| 2577 spa->spa_scrub_type = type; | |
| 2578 spa->spa_scrub_restart_txg = 0; | |
| 2579 | |
| 2580 if (type != POOL_SCRUB_NONE) { | |
| 2581 spa->spa_scrub_mintxg = mintxg; | |
| 789 | 2582 spa->spa_scrub_maxtxg = maxtxg; |
| 2583 spa->spa_scrub_th = traverse_init(spa, spa_scrub_cb, NULL, | |
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2584 ADVANCE_PRE | ADVANCE_PRUNE | ADVANCE_ZIL, |
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2585 ZIO_FLAG_CANFAIL); |
| 789 | 2586 traverse_add_pool(spa->spa_scrub_th, mintxg, maxtxg); |
| 2587 spa->spa_scrub_thread = thread_create(NULL, 0, | |
| 2588 spa_scrub_thread, spa, 0, &p0, TS_RUN, minclsyspri); | |
| 2589 } | |
| 2590 | |
| 1544 | 2591 mutex_exit(&spa->spa_scrub_lock); |
| 2592 | |
| 789 | 2593 return (0); |
| 2594 } | |
| 2595 | |
| 1544 | 2596 /* |
| 2597 * ========================================================================== | |
| 2598 * SPA async task processing | |
| 2599 * ========================================================================== | |
| 2600 */ | |
| 2601 | |
| 2602 static void | |
| 2603 spa_async_reopen(spa_t *spa) | |
| 789 | 2604 { |
| 1544 | 2605 vdev_t *rvd = spa->spa_root_vdev; |
| 2606 vdev_t *tvd; | |
| 2607 int c; | |
| 2608 | |
| 2609 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 2610 | |
| 2611 for (c = 0; c < rvd->vdev_children; c++) { | |
| 2612 tvd = rvd->vdev_child[c]; | |
| 2613 if (tvd->vdev_reopen_wanted) { | |
| 2614 tvd->vdev_reopen_wanted = 0; | |
| 2615 vdev_reopen(tvd); | |
| 2616 } | |
| 2617 } | |
| 789 | 2618 |
| 1544 | 2619 spa_config_exit(spa, FTAG); |
| 2620 } | |
| 2621 | |
| 2622 static void | |
| 2623 spa_async_thread(spa_t *spa) | |
| 2624 { | |
| 2625 int tasks; | |
| 2626 | |
| 2627 ASSERT(spa->spa_sync_on); | |
| 789 | 2628 |
| 1544 | 2629 mutex_enter(&spa->spa_async_lock); |
| 2630 tasks = spa->spa_async_tasks; | |
| 2631 spa->spa_async_tasks = 0; | |
| 2632 mutex_exit(&spa->spa_async_lock); | |
| 2633 | |
| 2634 /* | |
|
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2635 * See if the config needs to be updated. |
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2636 */ |
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2637 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { |
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2638 mutex_enter(&spa_namespace_lock); |
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2639 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); |
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2640 mutex_exit(&spa_namespace_lock); |
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2641 } |
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2642 |
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2643 /* |
| 1544 | 2644 * See if any devices need to be reopened. |
| 2645 */ | |
| 2646 if (tasks & SPA_ASYNC_REOPEN) | |
| 2647 spa_async_reopen(spa); | |
| 2648 | |
| 2649 /* | |
| 2650 * If any devices are done replacing, detach them. | |
| 2651 */ | |
| 2652 if (tasks & SPA_ASYNC_REPLACE_DONE) | |
| 789 | 2653 spa_vdev_replace_done(spa); |
| 2654 | |
| 1544 | 2655 /* |
| 2656 * Kick off a scrub. | |
| 2657 */ | |
| 2658 if (tasks & SPA_ASYNC_SCRUB) | |
| 2659 VERIFY(spa_scrub(spa, POOL_SCRUB_EVERYTHING, B_TRUE) == 0); | |
| 2660 | |
| 2661 /* | |
| 2662 * Kick off a resilver. | |
| 2663 */ | |
| 2664 if (tasks & SPA_ASYNC_RESILVER) | |
| 2665 VERIFY(spa_scrub(spa, POOL_SCRUB_RESILVER, B_TRUE) == 0); | |
| 2666 | |
| 2667 /* | |
| 2668 * Let the world know that we're done. | |
| 2669 */ | |
| 2670 mutex_enter(&spa->spa_async_lock); | |
| 2671 spa->spa_async_thread = NULL; | |
| 2672 cv_broadcast(&spa->spa_async_cv); | |
| 2673 mutex_exit(&spa->spa_async_lock); | |
| 2674 thread_exit(); | |
| 2675 } | |
| 2676 | |
| 2677 void | |
| 2678 spa_async_suspend(spa_t *spa) | |
| 2679 { | |
| 2680 mutex_enter(&spa->spa_async_lock); | |
| 2681 spa->spa_async_suspended++; | |
| 2682 while (spa->spa_async_thread != NULL) | |
| 2683 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); | |
| 2684 mutex_exit(&spa->spa_async_lock); | |
| 2685 } | |
| 2686 | |
| 2687 void | |
| 2688 spa_async_resume(spa_t *spa) | |
| 2689 { | |
| 2690 mutex_enter(&spa->spa_async_lock); | |
| 2691 ASSERT(spa->spa_async_suspended != 0); | |
| 2692 spa->spa_async_suspended--; | |
| 2693 mutex_exit(&spa->spa_async_lock); | |
| 2694 } | |
| 2695 | |
| 2696 static void | |
| 2697 spa_async_dispatch(spa_t *spa) | |
| 2698 { | |
| 2699 mutex_enter(&spa->spa_async_lock); | |
| 2700 if (spa->spa_async_tasks && !spa->spa_async_suspended && | |
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2701 spa->spa_async_thread == NULL && |
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2702 rootdir != NULL && !vn_is_readonly(rootdir)) |
| 1544 | 2703 spa->spa_async_thread = thread_create(NULL, 0, |
| 2704 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); | |
| 2705 mutex_exit(&spa->spa_async_lock); | |
| 2706 } | |
| 2707 | |
| 2708 void | |
| 2709 spa_async_request(spa_t *spa, int task) | |
| 2710 { | |
| 2711 mutex_enter(&spa->spa_async_lock); | |
| 2712 spa->spa_async_tasks |= task; | |
| 2713 mutex_exit(&spa->spa_async_lock); | |
| 789 | 2714 } |
| 2715 | |
| 2716 /* | |
| 2717 * ========================================================================== | |
| 2718 * SPA syncing routines | |
| 2719 * ========================================================================== | |
| 2720 */ | |
| 2721 | |
| 2722 static void | |
| 2723 spa_sync_deferred_frees(spa_t *spa, uint64_t txg) | |
| 2724 { | |
| 2725 bplist_t *bpl = &spa->spa_sync_bplist; | |
| 2726 dmu_tx_t *tx; | |
| 2727 blkptr_t blk; | |
| 2728 uint64_t itor = 0; | |
| 2729 zio_t *zio; | |
| 2730 int error; | |
| 2731 uint8_t c = 1; | |
| 2732 | |
| 2733 zio = zio_root(spa, NULL, NULL, ZIO_FLAG_CONFIG_HELD); | |
| 2734 | |
| 2735 while (bplist_iterate(bpl, &itor, &blk) == 0) | |
| 2736 zio_nowait(zio_free(zio, spa, txg, &blk, NULL, NULL)); | |
| 2737 | |
| 2738 error = zio_wait(zio); | |
| 2739 ASSERT3U(error, ==, 0); | |
| 2740 | |
| 2741 tx = dmu_tx_create_assigned(spa->spa_dsl_pool, txg); | |
| 2742 bplist_vacate(bpl, tx); | |
| 2743 | |
| 2744 /* | |
| 2745 * Pre-dirty the first block so we sync to convergence faster. | |
| 2746 * (Usually only the first block is needed.) | |
| 2747 */ | |
| 2748 dmu_write(spa->spa_meta_objset, spa->spa_sync_bplist_obj, 0, 1, &c, tx); | |
| 2749 dmu_tx_commit(tx); | |
| 2750 } | |
| 2751 | |
| 2752 static void | |
| 2082 | 2753 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) |
| 2754 { | |
| 2755 char *packed = NULL; | |
| 2756 size_t nvsize = 0; | |
| 2757 dmu_buf_t *db; | |
| 2758 | |
| 2759 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); | |
| 2760 | |
| 2761 packed = kmem_alloc(nvsize, KM_SLEEP); | |
| 2762 | |
| 2763 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, | |
| 2764 KM_SLEEP) == 0); | |
| 2765 | |
| 2766 dmu_write(spa->spa_meta_objset, obj, 0, nvsize, packed, tx); | |
| 2767 | |
| 2768 kmem_free(packed, nvsize); | |
| 2769 | |
| 2770 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); | |
| 2771 dmu_buf_will_dirty(db, tx); | |
| 2772 *(uint64_t *)db->db_data = nvsize; | |
| 2773 dmu_buf_rele(db, FTAG); | |
| 2774 } | |
| 2775 | |
| 2776 static void | |
| 2777 spa_sync_spares(spa_t *spa, dmu_tx_t *tx) | |
| 2778 { | |
| 2779 nvlist_t *nvroot; | |
| 2780 nvlist_t **spares; | |
| 2781 int i; | |
| 2782 | |
| 2783 if (!spa->spa_sync_spares) | |
| 2784 return; | |
| 2785 | |
| 2786 /* | |
| 2787 * Update the MOS nvlist describing the list of available spares. | |
| 2788 * spa_validate_spares() will have already made sure this nvlist is | |
| 2789 * valid and the vdevs are labelled appropriately. | |
| 2790 */ | |
| 2791 if (spa->spa_spares_object == 0) { | |
| 2792 spa->spa_spares_object = dmu_object_alloc(spa->spa_meta_objset, | |
| 2793 DMU_OT_PACKED_NVLIST, 1 << 14, | |
| 2794 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); | |
| 2795 VERIFY(zap_update(spa->spa_meta_objset, | |
| 2796 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SPARES, | |
| 2797 sizeof (uint64_t), 1, &spa->spa_spares_object, tx) == 0); | |
| 2798 } | |
| 2799 | |
| 2800 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 2801 if (spa->spa_nspares == 0) { | |
| 2802 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2803 NULL, 0) == 0); | |
| 2804 } else { | |
| 2805 spares = kmem_alloc(spa->spa_nspares * sizeof (void *), | |
| 2806 KM_SLEEP); | |
| 2807 for (i = 0; i < spa->spa_nspares; i++) | |
| 2808 spares[i] = vdev_config_generate(spa, | |
| 2809 spa->spa_spares[i], B_FALSE, B_TRUE); | |
| 2810 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, | |
| 2811 spares, spa->spa_nspares) == 0); | |
| 2812 for (i = 0; i < spa->spa_nspares; i++) | |
| 2813 nvlist_free(spares[i]); | |
| 2814 kmem_free(spares, spa->spa_nspares * sizeof (void *)); | |
| 2815 } | |
| 2816 | |
| 2817 spa_sync_nvlist(spa, spa->spa_spares_object, nvroot, tx); | |
| 2926 | 2818 nvlist_free(nvroot); |
| 2082 | 2819 |
| 2820 spa->spa_sync_spares = B_FALSE; | |
| 2821 } | |
| 2822 | |
| 2823 static void | |
| 789 | 2824 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) |
| 2825 { | |
| 2826 nvlist_t *config; | |
| 2827 | |
| 2828 if (list_is_empty(&spa->spa_dirty_list)) | |
| 2829 return; | |
| 2830 | |
| 2831 config = spa_config_generate(spa, NULL, dmu_tx_get_txg(tx), B_FALSE); | |
| 2832 | |
|
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2833 if (spa->spa_config_syncing) |
|
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2834 nvlist_free(spa->spa_config_syncing); |
|
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2835 spa->spa_config_syncing = config; |
| 789 | 2836 |
| 2082 | 2837 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); |
| 789 | 2838 } |
| 2839 | |
| 3912 | 2840 static void |
| 2841 spa_sync_props(void *arg1, void *arg2, dmu_tx_t *tx) | |
| 2842 { | |
| 2843 spa_t *spa = arg1; | |
| 2844 nvlist_t *nvp = arg2; | |
| 2845 nvpair_t *nvpair; | |
| 2846 objset_t *mos = spa->spa_meta_objset; | |
| 2847 uint64_t zapobj; | |
| 2848 | |
| 2849 mutex_enter(&spa->spa_props_lock); | |
| 2850 if (spa->spa_pool_props_object == 0) { | |
| 2851 zapobj = zap_create(mos, DMU_OT_POOL_PROPS, DMU_OT_NONE, 0, tx); | |
| 2852 VERIFY(zapobj > 0); | |
| 2853 | |
| 2854 spa->spa_pool_props_object = zapobj; | |
| 2855 | |
| 2856 VERIFY(zap_update(mos, DMU_POOL_DIRECTORY_OBJECT, | |
| 2857 DMU_POOL_PROPS, 8, 1, | |
| 2858 &spa->spa_pool_props_object, tx) == 0); | |
| 2859 } | |
| 2860 mutex_exit(&spa->spa_props_lock); | |
| 2861 | |
| 2862 nvpair = NULL; | |
| 2863 while ((nvpair = nvlist_next_nvpair(nvp, nvpair))) { | |
| 2864 switch (zpool_name_to_prop(nvpair_name(nvpair))) { | |
| 2865 case ZFS_PROP_BOOTFS: | |
| 2866 VERIFY(nvlist_lookup_uint64(nvp, | |
| 2867 nvpair_name(nvpair), &spa->spa_bootfs) == 0); | |
| 2868 VERIFY(zap_update(mos, | |
| 2869 spa->spa_pool_props_object, | |
| 2870 zpool_prop_to_name(ZFS_PROP_BOOTFS), 8, 1, | |
| 2871 &spa->spa_bootfs, tx) == 0); | |
| 2872 break; | |
| 2873 } | |
| 2874 } | |
| 2875 } | |
| 2876 | |
| 789 | 2877 /* |
| 2878 * Sync the specified transaction group. New blocks may be dirtied as | |
| 2879 * part of the process, so we iterate until it converges. | |
| 2880 */ | |
| 2881 void | |
| 2882 spa_sync(spa_t *spa, uint64_t txg) | |
| 2883 { | |
| 2884 dsl_pool_t *dp = spa->spa_dsl_pool; | |
| 2885 objset_t *mos = spa->spa_meta_objset; | |
| 2886 bplist_t *bpl = &spa->spa_sync_bplist; | |
|
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2887 vdev_t *rvd = spa->spa_root_vdev; |
| 789 | 2888 vdev_t *vd; |
| 2889 dmu_tx_t *tx; | |
| 2890 int dirty_vdevs; | |
| 2891 | |
| 2892 /* | |
| 2893 * Lock out configuration changes. | |
| 2894 */ | |
| 1544 | 2895 spa_config_enter(spa, RW_READER, FTAG); |
| 789 | 2896 |
| 2897 spa->spa_syncing_txg = txg; | |
| 2898 spa->spa_sync_pass = 0; | |
| 2899 | |
| 1544 | 2900 VERIFY(0 == bplist_open(bpl, mos, spa->spa_sync_bplist_obj)); |
| 789 | 2901 |
| 2082 | 2902 tx = dmu_tx_create_assigned(dp, txg); |
| 2903 | |
| 2904 /* | |
| 2905 * If we are upgrading to ZFS_VERSION_RAIDZ_DEFLATE this txg, | |
| 2906 * set spa_deflate if we have no raid-z vdevs. | |
| 2907 */ | |
| 2908 if (spa->spa_ubsync.ub_version < ZFS_VERSION_RAIDZ_DEFLATE && | |
| 2909 spa->spa_uberblock.ub_version >= ZFS_VERSION_RAIDZ_DEFLATE) { | |
| 2910 int i; | |
| 2911 | |
| 2912 for (i = 0; i < rvd->vdev_children; i++) { | |
| 2913 vd = rvd->vdev_child[i]; | |
| 2914 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) | |
| 2915 break; | |
| 2916 } | |
| 2917 if (i == rvd->vdev_children) { | |
| 2918 spa->spa_deflate = TRUE; | |
| 2919 VERIFY(0 == zap_add(spa->spa_meta_objset, | |
| 2920 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, | |
| 2921 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); | |
| 2922 } | |
| 2923 } | |
| 2924 | |
| 789 | 2925 /* |
| 2926 * If anything has changed in this txg, push the deferred frees | |
| 2927 * from the previous txg. If not, leave them alone so that we | |
| 2928 * don't generate work on an otherwise idle system. | |
| 2929 */ | |
| 2930 if (!txg_list_empty(&dp->dp_dirty_datasets, txg) || | |
|
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2931 !txg_list_empty(&dp->dp_dirty_dirs, txg) || |
|
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|
2932 !txg_list_empty(&dp->dp_sync_tasks, txg)) |
| 789 | 2933 spa_sync_deferred_frees(spa, txg); |
| 2934 | |
| 2935 /* | |
| 2936 * Iterate to convergence. | |
| 2937 */ | |
| 2938 do { | |
| 2939 spa->spa_sync_pass++; | |
| 2940 | |
| 2941 spa_sync_config_object(spa, tx); | |
| 2082 | 2942 spa_sync_spares(spa, tx); |
| 1544 | 2943 spa_errlog_sync(spa, txg); |
| 789 | 2944 dsl_pool_sync(dp, txg); |
| 2945 | |
| 2946 dirty_vdevs = 0; | |
| 2947 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) { | |
| 2948 vdev_sync(vd, txg); | |
| 2949 dirty_vdevs++; | |
| 2950 } | |
| 2951 | |
| 2952 bplist_sync(bpl, tx); | |
| 2953 } while (dirty_vdevs); | |
| 2954 | |
| 2955 bplist_close(bpl); | |
| 2956 | |
| 2957 dprintf("txg %llu passes %d\n", txg, spa->spa_sync_pass); | |
| 2958 | |
| 2959 /* | |
| 2960 * Rewrite the vdev configuration (which includes the uberblock) | |
| 2961 * to commit the transaction group. | |
|
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2962 * |
|
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2963 * If there are any dirty vdevs, sync the uberblock to all vdevs. |
|
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2964 * Otherwise, pick a random top-level vdev that's known to be |
|
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2965 * visible in the config cache (see spa_vdev_add() for details). |
|
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2966 * If the write fails, try the next vdev until we're tried them all. |
| 789 | 2967 */ |
|
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2968 if (!list_is_empty(&spa->spa_dirty_list)) { |
|
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2969 VERIFY(vdev_config_sync(rvd, txg) == 0); |
|
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2970 } else { |
|
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2971 int children = rvd->vdev_children; |
|
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2972 int c0 = spa_get_random(children); |
|
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2973 int c; |
|
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2974 |
|
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2975 for (c = 0; c < children; c++) { |
|
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2976 vd = rvd->vdev_child[(c0 + c) % children]; |
|
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2977 if (vd->vdev_ms_array == 0) |
|
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2978 continue; |
|
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2979 if (vdev_config_sync(vd, txg) == 0) |
|
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2980 break; |
|
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|
2981 } |
|
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2982 if (c == children) |
|
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2983 VERIFY(vdev_config_sync(rvd, txg) == 0); |
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2984 } |
|
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2985 |
| 2082 | 2986 dmu_tx_commit(tx); |
| 2987 | |
|
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2988 /* |
|
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2989 * Clear the dirty config list. |
|
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2990 */ |
|
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2991 while ((vd = list_head(&spa->spa_dirty_list)) != NULL) |
|
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2992 vdev_config_clean(vd); |
|
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2993 |
|
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2994 /* |
|
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2995 * Now that the new config has synced transactionally, |
|
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2996 * let it become visible to the config cache. |
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2997 */ |
|
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2998 if (spa->spa_config_syncing != NULL) { |
|
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2999 spa_config_set(spa, spa->spa_config_syncing); |
|
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3000 spa->spa_config_txg = txg; |
|
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3001 spa->spa_config_syncing = NULL; |
|
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3002 } |
| 789 | 3003 |
| 3004 /* | |
| 3005 * Make a stable copy of the fully synced uberblock. | |
| 3006 * We use this as the root for pool traversals. | |
| 3007 */ | |
| 3008 spa->spa_traverse_wanted = 1; /* tells traverse_more() to stop */ | |
| 3009 | |
| 3010 spa_scrub_suspend(spa); /* stop scrubbing and finish I/Os */ | |
| 3011 | |
| 3012 rw_enter(&spa->spa_traverse_lock, RW_WRITER); | |
| 3013 spa->spa_traverse_wanted = 0; | |
| 3014 spa->spa_ubsync = spa->spa_uberblock; | |
| 3015 rw_exit(&spa->spa_traverse_lock); | |
| 3016 | |
| 3017 spa_scrub_resume(spa); /* resume scrub with new ubsync */ | |
| 3018 | |
| 3019 /* | |
| 3020 * Clean up the ZIL records for the synced txg. | |
| 3021 */ | |
| 3022 dsl_pool_zil_clean(dp); | |
| 3023 | |
| 3024 /* | |
| 3025 * Update usable space statistics. | |
| 3026 */ | |
| 3027 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) | |
| 3028 vdev_sync_done(vd, txg); | |
| 3029 | |
| 3030 /* | |
| 3031 * It had better be the case that we didn't dirty anything | |
| 2082 | 3032 * since vdev_config_sync(). |
| 789 | 3033 */ |
| 3034 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); | |
| 3035 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); | |
| 3036 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); | |
| 3037 ASSERT(bpl->bpl_queue == NULL); | |
| 3038 | |
| 1544 | 3039 spa_config_exit(spa, FTAG); |
| 3040 | |
| 3041 /* | |
| 3042 * If any async tasks have been requested, kick them off. | |
| 3043 */ | |
| 3044 spa_async_dispatch(spa); | |
| 789 | 3045 } |
| 3046 | |
| 3047 /* | |
| 3048 * Sync all pools. We don't want to hold the namespace lock across these | |
| 3049 * operations, so we take a reference on the spa_t and drop the lock during the | |
| 3050 * sync. | |
| 3051 */ | |
| 3052 void | |
| 3053 spa_sync_allpools(void) | |
| 3054 { | |
| 3055 spa_t *spa = NULL; | |
| 3056 mutex_enter(&spa_namespace_lock); | |
| 3057 while ((spa = spa_next(spa)) != NULL) { | |
| 3058 if (spa_state(spa) != POOL_STATE_ACTIVE) | |
| 3059 continue; | |
| 3060 spa_open_ref(spa, FTAG); | |
| 3061 mutex_exit(&spa_namespace_lock); | |
| 3062 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 3063 mutex_enter(&spa_namespace_lock); | |
| 3064 spa_close(spa, FTAG); | |
| 3065 } | |
| 3066 mutex_exit(&spa_namespace_lock); | |
| 3067 } | |
| 3068 | |
| 3069 /* | |
| 3070 * ========================================================================== | |
| 3071 * Miscellaneous routines | |
| 3072 * ========================================================================== | |
| 3073 */ | |
| 3074 | |
| 3075 /* | |
| 3076 * Remove all pools in the system. | |
| 3077 */ | |
| 3078 void | |
| 3079 spa_evict_all(void) | |
| 3080 { | |
| 3081 spa_t *spa; | |
| 3082 | |
| 3083 /* | |
| 3084 * Remove all cached state. All pools should be closed now, | |
| 3085 * so every spa in the AVL tree should be unreferenced. | |
| 3086 */ | |
| 3087 mutex_enter(&spa_namespace_lock); | |
| 3088 while ((spa = spa_next(NULL)) != NULL) { | |
| 3089 /* | |
| 1544 | 3090 * Stop async tasks. The async thread may need to detach |
| 3091 * a device that's been replaced, which requires grabbing | |
| 3092 * spa_namespace_lock, so we must drop it here. | |
| 789 | 3093 */ |
| 3094 spa_open_ref(spa, FTAG); | |
| 3095 mutex_exit(&spa_namespace_lock); | |
| 1544 | 3096 spa_async_suspend(spa); |
| 789 | 3097 VERIFY(spa_scrub(spa, POOL_SCRUB_NONE, B_TRUE) == 0); |
| 3098 mutex_enter(&spa_namespace_lock); | |
| 3099 spa_close(spa, FTAG); | |
| 3100 | |
| 3101 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { | |
| 3102 spa_unload(spa); | |
| 3103 spa_deactivate(spa); | |
| 3104 } | |
| 3105 spa_remove(spa); | |
| 3106 } | |
| 3107 mutex_exit(&spa_namespace_lock); | |
| 3108 } | |
| 1544 | 3109 |
| 3110 vdev_t * | |
| 3111 spa_lookup_by_guid(spa_t *spa, uint64_t guid) | |
| 3112 { | |
| 3113 return (vdev_lookup_by_guid(spa->spa_root_vdev, guid)); | |
| 3114 } | |
| 1760 | 3115 |
| 3116 void | |
| 3117 spa_upgrade(spa_t *spa) | |
| 3118 { | |
| 3119 spa_config_enter(spa, RW_WRITER, FTAG); | |
| 3120 | |
| 3121 /* | |
| 3122 * This should only be called for a non-faulted pool, and since a | |
| 3123 * future version would result in an unopenable pool, this shouldn't be | |
| 3124 * possible. | |
| 3125 */ | |
| 3126 ASSERT(spa->spa_uberblock.ub_version <= ZFS_VERSION); | |
| 3127 | |
| 3128 spa->spa_uberblock.ub_version = ZFS_VERSION; | |
| 3129 vdev_config_dirty(spa->spa_root_vdev); | |
| 3130 | |
| 3131 spa_config_exit(spa, FTAG); | |
| 2082 | 3132 |
| 3133 txg_wait_synced(spa_get_dsl(spa), 0); | |
| 1760 | 3134 } |
| 2082 | 3135 |
| 3136 boolean_t | |
| 3137 spa_has_spare(spa_t *spa, uint64_t guid) | |
| 3138 { | |
| 3139 int i; | |
|
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|
3140 uint64_t spareguid; |
| 2082 | 3141 |
| 3142 for (i = 0; i < spa->spa_nspares; i++) | |
| 3143 if (spa->spa_spares[i]->vdev_guid == guid) | |
| 3144 return (B_TRUE); | |
| 3145 | |
|
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|
3146 for (i = 0; i < spa->spa_pending_nspares; i++) { |
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3147 if (nvlist_lookup_uint64(spa->spa_pending_spares[i], |
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|
3148 ZPOOL_CONFIG_GUID, &spareguid) == 0 && |
|
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|
3149 spareguid == guid) |
|
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|
3150 return (B_TRUE); |
|
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3151 } |
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3152 |
| 2082 | 3153 return (B_FALSE); |
| 3154 } | |
| 3912 | 3155 |
| 3156 int | |
| 3157 spa_set_props(spa_t *spa, nvlist_t *nvp) | |
| 3158 { | |
| 3159 return (dsl_sync_task_do(spa_get_dsl(spa), NULL, spa_sync_props, | |
| 3160 spa, nvp, 3)); | |
| 3161 } | |
| 3162 | |
| 3163 int | |
| 3164 spa_get_props(spa_t *spa, nvlist_t **nvp) | |
| 3165 { | |
| 3166 zap_cursor_t zc; | |
| 3167 zap_attribute_t za; | |
| 3168 objset_t *mos = spa->spa_meta_objset; | |
| 3169 zfs_source_t src; | |
| 3170 zfs_prop_t prop; | |
| 3171 nvlist_t *propval; | |
| 3172 uint64_t value; | |
| 3173 int err; | |
| 3174 | |
| 3175 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 3176 | |
| 3177 mutex_enter(&spa->spa_props_lock); | |
| 3178 /* If no props object, then just return empty nvlist */ | |
| 3179 if (spa->spa_pool_props_object == 0) { | |
| 3180 mutex_exit(&spa->spa_props_lock); | |
| 3181 return (0); | |
| 3182 } | |
| 3183 | |
| 3184 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); | |
| 3185 (err = zap_cursor_retrieve(&zc, &za)) == 0; | |
| 3186 zap_cursor_advance(&zc)) { | |
| 3187 | |
| 3188 if ((prop = zpool_name_to_prop(za.za_name)) == ZFS_PROP_INVAL) | |
| 3189 continue; | |
| 3190 | |
| 3191 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); | |
| 3192 switch (za.za_integer_length) { | |
| 3193 case 8: | |
| 3194 if (zfs_prop_default_numeric(prop) == | |
| 3195 za.za_first_integer) | |
| 3196 src = ZFS_SRC_DEFAULT; | |
| 3197 else | |
| 3198 src = ZFS_SRC_LOCAL; | |
| 3199 value = za.za_first_integer; | |
| 3200 | |
| 3201 if (prop == ZFS_PROP_BOOTFS) { | |
| 3202 dsl_pool_t *dp; | |
| 3203 dsl_dataset_t *ds = NULL; | |
| 3204 char strval[MAXPATHLEN]; | |
| 3205 | |
| 3206 dp = spa_get_dsl(spa); | |
| 3207 rw_enter(&dp->dp_config_rwlock, RW_READER); | |
| 3208 if ((err = dsl_dataset_open_obj(dp, | |
| 3209 za.za_first_integer, NULL, DS_MODE_NONE, | |
| 3210 FTAG, &ds)) != 0) { | |
| 3211 rw_exit(&dp->dp_config_rwlock); | |
| 3212 break; | |
| 3213 } | |
| 3214 dsl_dataset_name(ds, strval); | |
| 3215 dsl_dataset_close(ds, DS_MODE_NONE, FTAG); | |
| 3216 rw_exit(&dp->dp_config_rwlock); | |
| 3217 | |
| 3218 VERIFY(nvlist_add_uint64(propval, | |
| 3219 ZFS_PROP_SOURCE, src) == 0); | |
| 3220 VERIFY(nvlist_add_string(propval, | |
| 3221 ZFS_PROP_VALUE, strval) == 0); | |
| 3222 } else { | |
| 3223 VERIFY(nvlist_add_uint64(propval, | |
| 3224 ZFS_PROP_SOURCE, src) == 0); | |
| 3225 VERIFY(nvlist_add_uint64(propval, | |
| 3226 ZFS_PROP_VALUE, value) == 0); | |
| 3227 } | |
| 3228 VERIFY(nvlist_add_nvlist(*nvp, za.za_name, | |
| 3229 propval) == 0); | |
| 3230 break; | |
| 3231 } | |
| 3232 nvlist_free(propval); | |
| 3233 } | |
| 3234 zap_cursor_fini(&zc); | |
| 3235 mutex_exit(&spa->spa_props_lock); | |
| 3236 if (err && err != ENOENT) { | |
| 3237 nvlist_free(*nvp); | |
| 3238 return (err); | |
| 3239 } | |
| 3240 | |
| 3241 return (0); | |
| 3242 } | |
| 3243 | |
| 3244 /* | |
| 3245 * If the bootfs property value is dsobj, clear it. | |
| 3246 */ | |
| 3247 void | |
| 3248 spa_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) | |
| 3249 { | |
| 3250 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { | |
| 3251 VERIFY(zap_remove(spa->spa_meta_objset, | |
| 3252 spa->spa_pool_props_object, | |
| 3253 zpool_prop_to_name(ZFS_PROP_BOOTFS), tx) == 0); | |
| 3254 spa->spa_bootfs = 0; | |
| 3255 } | |
| 3256 } |