1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2011, 2019 by Delphix. All rights reserved. 25 * Copyright (c) 2015, Nexenta Systems, Inc. All rights reserved. 26 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 27 * Copyright 2013 Saso Kiselkov. All rights reserved. 28 * Copyright (c) 2014 Integros [integros.com] 29 * Copyright 2016 Toomas Soome <tsoome@me.com> 30 * Copyright 2018 Joyent, Inc. 31 * Copyright (c) 2017, Intel Corporation. 32 * Copyright (c) 2017 Datto Inc. 33 * Copyright 2018 OmniOS Community Edition (OmniOSce) Association. 34 */ 35 36 /* 37 * SPA: Storage Pool Allocator 38 * 39 * This file contains all the routines used when modifying on-disk SPA state. 40 * This includes opening, importing, destroying, exporting a pool, and syncing a 41 * pool. 42 */ 43 44 #include <sys/zfs_context.h> 45 #include <sys/fm/fs/zfs.h> 46 #include <sys/spa_impl.h> 47 #include <sys/zio.h> 48 #include <sys/zio_checksum.h> 49 #include <sys/dmu.h> 50 #include <sys/dmu_tx.h> 51 #include <sys/zap.h> 52 #include <sys/zil.h> 53 #include <sys/ddt.h> 54 #include <sys/vdev_impl.h> 55 #include <sys/vdev_removal.h> 56 #include <sys/vdev_indirect_mapping.h> 57 #include <sys/vdev_indirect_births.h> 58 #include <sys/vdev_initialize.h> 59 #include <sys/vdev_trim.h> 60 #include <sys/metaslab.h> 61 #include <sys/metaslab_impl.h> 62 #include <sys/mmp.h> 63 #include <sys/uberblock_impl.h> 64 #include <sys/txg.h> 65 #include <sys/avl.h> 66 #include <sys/bpobj.h> 67 #include <sys/dmu_traverse.h> 68 #include <sys/dmu_objset.h> 69 #include <sys/unique.h> 70 #include <sys/dsl_pool.h> 71 #include <sys/dsl_dataset.h> 72 #include <sys/dsl_dir.h> 73 #include <sys/dsl_prop.h> 74 #include <sys/dsl_synctask.h> 75 #include <sys/fs/zfs.h> 76 #include <sys/arc.h> 77 #include <sys/callb.h> 78 #include <sys/systeminfo.h> 79 #include <sys/spa_boot.h> 80 #include <sys/zfs_ioctl.h> 81 #include <sys/dsl_scan.h> 82 #include <sys/zfeature.h> 83 #include <sys/dsl_destroy.h> 84 #include <sys/abd.h> 85 86 #ifdef _KERNEL 87 #include <sys/bootprops.h> 88 #include <sys/callb.h> 89 #include <sys/cpupart.h> 90 #include <sys/pool.h> 91 #include <sys/sysdc.h> 92 #include <sys/zone.h> 93 #endif /* _KERNEL */ 94 95 #include "zfs_prop.h" 96 #include "zfs_comutil.h" 97 98 /* 99 * The interval, in seconds, at which failed configuration cache file writes 100 * should be retried. 101 */ 102 int zfs_ccw_retry_interval = 300; 103 104 typedef enum zti_modes { 105 ZTI_MODE_FIXED, /* value is # of threads (min 1) */ 106 ZTI_MODE_BATCH, /* cpu-intensive; value is ignored */ 107 ZTI_MODE_NULL, /* don't create a taskq */ 108 ZTI_NMODES 109 } zti_modes_t; 110 111 #define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) } 112 #define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 } 113 #define ZTI_NULL { ZTI_MODE_NULL, 0, 0 } 114 115 #define ZTI_N(n) ZTI_P(n, 1) 116 #define ZTI_ONE ZTI_N(1) 117 118 typedef struct zio_taskq_info { 119 zti_modes_t zti_mode; 120 uint_t zti_value; 121 uint_t zti_count; 122 } zio_taskq_info_t; 123 124 static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = { 125 "issue", "issue_high", "intr", "intr_high" 126 }; 127 128 /* 129 * This table defines the taskq settings for each ZFS I/O type. When 130 * initializing a pool, we use this table to create an appropriately sized 131 * taskq. Some operations are low volume and therefore have a small, static 132 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE 133 * macros. Other operations process a large amount of data; the ZTI_BATCH 134 * macro causes us to create a taskq oriented for throughput. Some operations 135 * are so high frequency and short-lived that the taskq itself can become a 136 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an 137 * additional degree of parallelism specified by the number of threads per- 138 * taskq and the number of taskqs; when dispatching an event in this case, the 139 * particular taskq is chosen at random. 140 * 141 * The different taskq priorities are to handle the different contexts (issue 142 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that 143 * need to be handled with minimum delay. 144 */ 145 const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = { 146 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */ 147 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* NULL */ 148 { ZTI_N(8), ZTI_NULL, ZTI_P(12, 8), ZTI_NULL }, /* READ */ 149 { ZTI_BATCH, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */ 150 { ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */ 151 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */ 152 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */ 153 { ZTI_N(4), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* TRIM */ 154 }; 155 156 static void spa_sync_version(void *arg, dmu_tx_t *tx); 157 static void spa_sync_props(void *arg, dmu_tx_t *tx); 158 static boolean_t spa_has_active_shared_spare(spa_t *spa); 159 static int spa_load_impl(spa_t *spa, spa_import_type_t type, char **ereport); 160 static void spa_vdev_resilver_done(spa_t *spa); 161 162 uint_t zio_taskq_batch_pct = 75; /* 1 thread per cpu in pset */ 163 id_t zio_taskq_psrset_bind = PS_NONE; 164 boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */ 165 uint_t zio_taskq_basedc = 80; /* base duty cycle */ 166 167 boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */ 168 extern int zfs_sync_pass_deferred_free; 169 170 /* 171 * Report any spa_load_verify errors found, but do not fail spa_load. 172 * This is used by zdb to analyze non-idle pools. 173 */ 174 boolean_t spa_load_verify_dryrun = B_FALSE; 175 176 /* 177 * This (illegal) pool name is used when temporarily importing a spa_t in order 178 * to get the vdev stats associated with the imported devices. 179 */ 180 #define TRYIMPORT_NAME "$import" 181 182 /* 183 * For debugging purposes: print out vdev tree during pool import. 184 */ 185 boolean_t spa_load_print_vdev_tree = B_FALSE; 186 187 /* 188 * A non-zero value for zfs_max_missing_tvds means that we allow importing 189 * pools with missing top-level vdevs. This is strictly intended for advanced 190 * pool recovery cases since missing data is almost inevitable. Pools with 191 * missing devices can only be imported read-only for safety reasons, and their 192 * fail-mode will be automatically set to "continue". 193 * 194 * With 1 missing vdev we should be able to import the pool and mount all 195 * datasets. User data that was not modified after the missing device has been 196 * added should be recoverable. This means that snapshots created prior to the 197 * addition of that device should be completely intact. 198 * 199 * With 2 missing vdevs, some datasets may fail to mount since there are 200 * dataset statistics that are stored as regular metadata. Some data might be 201 * recoverable if those vdevs were added recently. 202 * 203 * With 3 or more missing vdevs, the pool is severely damaged and MOS entries 204 * may be missing entirely. Chances of data recovery are very low. Note that 205 * there are also risks of performing an inadvertent rewind as we might be 206 * missing all the vdevs with the latest uberblocks. 207 */ 208 uint64_t zfs_max_missing_tvds = 0; 209 210 /* 211 * The parameters below are similar to zfs_max_missing_tvds but are only 212 * intended for a preliminary open of the pool with an untrusted config which 213 * might be incomplete or out-dated. 214 * 215 * We are more tolerant for pools opened from a cachefile since we could have 216 * an out-dated cachefile where a device removal was not registered. 217 * We could have set the limit arbitrarily high but in the case where devices 218 * are really missing we would want to return the proper error codes; we chose 219 * SPA_DVAS_PER_BP - 1 so that some copies of the MOS would still be available 220 * and we get a chance to retrieve the trusted config. 221 */ 222 uint64_t zfs_max_missing_tvds_cachefile = SPA_DVAS_PER_BP - 1; 223 224 /* 225 * In the case where config was assembled by scanning device paths (/dev/dsks 226 * by default) we are less tolerant since all the existing devices should have 227 * been detected and we want spa_load to return the right error codes. 228 */ 229 uint64_t zfs_max_missing_tvds_scan = 0; 230 231 /* 232 * Debugging aid that pauses spa_sync() towards the end. 233 */ 234 boolean_t zfs_pause_spa_sync = B_FALSE; 235 236 /* 237 * ========================================================================== 238 * SPA properties routines 239 * ========================================================================== 240 */ 241 242 /* 243 * Add a (source=src, propname=propval) list to an nvlist. 244 */ 245 static void 246 spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, 247 uint64_t intval, zprop_source_t src) 248 { 249 const char *propname = zpool_prop_to_name(prop); 250 nvlist_t *propval; 251 252 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); 253 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); 254 255 if (strval != NULL) 256 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0); 257 else 258 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0); 259 260 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0); 261 nvlist_free(propval); 262 } 263 264 /* 265 * Get property values from the spa configuration. 266 */ 267 static void 268 spa_prop_get_config(spa_t *spa, nvlist_t **nvp) 269 { 270 vdev_t *rvd = spa->spa_root_vdev; 271 dsl_pool_t *pool = spa->spa_dsl_pool; 272 uint64_t size, alloc, cap, version; 273 zprop_source_t src = ZPROP_SRC_NONE; 274 spa_config_dirent_t *dp; 275 metaslab_class_t *mc = spa_normal_class(spa); 276 277 ASSERT(MUTEX_HELD(&spa->spa_props_lock)); 278 279 if (rvd != NULL) { 280 alloc = metaslab_class_get_alloc(mc); 281 alloc += metaslab_class_get_alloc(spa_special_class(spa)); 282 alloc += metaslab_class_get_alloc(spa_dedup_class(spa)); 283 284 size = metaslab_class_get_space(mc); 285 size += metaslab_class_get_space(spa_special_class(spa)); 286 size += metaslab_class_get_space(spa_dedup_class(spa)); 287 288 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src); 289 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src); 290 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src); 291 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL, 292 size - alloc, src); 293 spa_prop_add_list(*nvp, ZPOOL_PROP_CHECKPOINT, NULL, 294 spa->spa_checkpoint_info.sci_dspace, src); 295 296 spa_prop_add_list(*nvp, ZPOOL_PROP_FRAGMENTATION, NULL, 297 metaslab_class_fragmentation(mc), src); 298 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, 299 metaslab_class_expandable_space(mc), src); 300 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, 301 (spa_mode(spa) == FREAD), src); 302 303 cap = (size == 0) ? 0 : (alloc * 100 / size); 304 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src); 305 306 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL, 307 ddt_get_pool_dedup_ratio(spa), src); 308 309 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, 310 rvd->vdev_state, src); 311 312 version = spa_version(spa); 313 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION)) 314 src = ZPROP_SRC_DEFAULT; 315 else 316 src = ZPROP_SRC_LOCAL; 317 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src); 318 } 319 320 if (pool != NULL) { 321 /* 322 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS, 323 * when opening pools before this version freedir will be NULL. 324 */ 325 if (pool->dp_free_dir != NULL) { 326 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL, 327 dsl_dir_phys(pool->dp_free_dir)->dd_used_bytes, 328 src); 329 } else { 330 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, 331 NULL, 0, src); 332 } 333 334 if (pool->dp_leak_dir != NULL) { 335 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, NULL, 336 dsl_dir_phys(pool->dp_leak_dir)->dd_used_bytes, 337 src); 338 } else { 339 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, 340 NULL, 0, src); 341 } 342 } 343 344 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); 345 346 if (spa->spa_comment != NULL) { 347 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment, 348 0, ZPROP_SRC_LOCAL); 349 } 350 351 if (spa->spa_root != NULL) 352 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, 353 0, ZPROP_SRC_LOCAL); 354 355 if (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_BLOCKS)) { 356 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL, 357 MIN(zfs_max_recordsize, SPA_MAXBLOCKSIZE), ZPROP_SRC_NONE); 358 } else { 359 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL, 360 SPA_OLD_MAXBLOCKSIZE, ZPROP_SRC_NONE); 361 } 362 363 if (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_DNODE)) { 364 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXDNODESIZE, NULL, 365 DNODE_MAX_SIZE, ZPROP_SRC_NONE); 366 } else { 367 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXDNODESIZE, NULL, 368 DNODE_MIN_SIZE, ZPROP_SRC_NONE); 369 } 370 371 if ((dp = list_head(&spa->spa_config_list)) != NULL) { 372 if (dp->scd_path == NULL) { 373 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 374 "none", 0, ZPROP_SRC_LOCAL); 375 } else if (strcmp(dp->scd_path, spa_config_path) != 0) { 376 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 377 dp->scd_path, 0, ZPROP_SRC_LOCAL); 378 } 379 } 380 } 381 382 /* 383 * Get zpool property values. 384 */ 385 int 386 spa_prop_get(spa_t *spa, nvlist_t **nvp) 387 { 388 objset_t *mos = spa->spa_meta_objset; 389 zap_cursor_t zc; 390 zap_attribute_t za; 391 int err; 392 393 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); 394 395 mutex_enter(&spa->spa_props_lock); 396 397 /* 398 * Get properties from the spa config. 399 */ 400 spa_prop_get_config(spa, nvp); 401 402 /* If no pool property object, no more prop to get. */ 403 if (mos == NULL || spa->spa_pool_props_object == 0) { 404 mutex_exit(&spa->spa_props_lock); 405 return (0); 406 } 407 408 /* 409 * Get properties from the MOS pool property object. 410 */ 411 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); 412 (err = zap_cursor_retrieve(&zc, &za)) == 0; 413 zap_cursor_advance(&zc)) { 414 uint64_t intval = 0; 415 char *strval = NULL; 416 zprop_source_t src = ZPROP_SRC_DEFAULT; 417 zpool_prop_t prop; 418 419 if ((prop = zpool_name_to_prop(za.za_name)) == ZPOOL_PROP_INVAL) 420 continue; 421 422 switch (za.za_integer_length) { 423 case 8: 424 /* integer property */ 425 if (za.za_first_integer != 426 zpool_prop_default_numeric(prop)) 427 src = ZPROP_SRC_LOCAL; 428 429 if (prop == ZPOOL_PROP_BOOTFS) { 430 dsl_pool_t *dp; 431 dsl_dataset_t *ds = NULL; 432 433 dp = spa_get_dsl(spa); 434 dsl_pool_config_enter(dp, FTAG); 435 err = dsl_dataset_hold_obj(dp, 436 za.za_first_integer, FTAG, &ds); 437 if (err != 0) { 438 dsl_pool_config_exit(dp, FTAG); 439 break; 440 } 441 442 strval = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, 443 KM_SLEEP); 444 dsl_dataset_name(ds, strval); 445 dsl_dataset_rele(ds, FTAG); 446 dsl_pool_config_exit(dp, FTAG); 447 } else { 448 strval = NULL; 449 intval = za.za_first_integer; 450 } 451 452 spa_prop_add_list(*nvp, prop, strval, intval, src); 453 454 if (strval != NULL) 455 kmem_free(strval, ZFS_MAX_DATASET_NAME_LEN); 456 457 break; 458 459 case 1: 460 /* string property */ 461 strval = kmem_alloc(za.za_num_integers, KM_SLEEP); 462 err = zap_lookup(mos, spa->spa_pool_props_object, 463 za.za_name, 1, za.za_num_integers, strval); 464 if (err) { 465 kmem_free(strval, za.za_num_integers); 466 break; 467 } 468 spa_prop_add_list(*nvp, prop, strval, 0, src); 469 kmem_free(strval, za.za_num_integers); 470 break; 471 472 default: 473 break; 474 } 475 } 476 zap_cursor_fini(&zc); 477 mutex_exit(&spa->spa_props_lock); 478 out: 479 if (err && err != ENOENT) { 480 nvlist_free(*nvp); 481 *nvp = NULL; 482 return (err); 483 } 484 485 return (0); 486 } 487 488 /* 489 * Validate the given pool properties nvlist and modify the list 490 * for the property values to be set. 491 */ 492 static int 493 spa_prop_validate(spa_t *spa, nvlist_t *props) 494 { 495 nvpair_t *elem; 496 int error = 0, reset_bootfs = 0; 497 uint64_t objnum = 0; 498 boolean_t has_feature = B_FALSE; 499 500 elem = NULL; 501 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 502 uint64_t intval; 503 char *strval, *slash, *check, *fname; 504 const char *propname = nvpair_name(elem); 505 zpool_prop_t prop = zpool_name_to_prop(propname); 506 507 switch (prop) { 508 case ZPOOL_PROP_INVAL: 509 if (!zpool_prop_feature(propname)) { 510 error = SET_ERROR(EINVAL); 511 break; 512 } 513 514 /* 515 * Sanitize the input. 516 */ 517 if (nvpair_type(elem) != DATA_TYPE_UINT64) { 518 error = SET_ERROR(EINVAL); 519 break; 520 } 521 522 if (nvpair_value_uint64(elem, &intval) != 0) { 523 error = SET_ERROR(EINVAL); 524 break; 525 } 526 527 if (intval != 0) { 528 error = SET_ERROR(EINVAL); 529 break; 530 } 531 532 fname = strchr(propname, '@') + 1; 533 if (zfeature_lookup_name(fname, NULL) != 0) { 534 error = SET_ERROR(EINVAL); 535 break; 536 } 537 538 has_feature = B_TRUE; 539 break; 540 541 case ZPOOL_PROP_VERSION: 542 error = nvpair_value_uint64(elem, &intval); 543 if (!error && 544 (intval < spa_version(spa) || 545 intval > SPA_VERSION_BEFORE_FEATURES || 546 has_feature)) 547 error = SET_ERROR(EINVAL); 548 break; 549 550 case ZPOOL_PROP_DELEGATION: 551 case ZPOOL_PROP_AUTOREPLACE: 552 case ZPOOL_PROP_LISTSNAPS: 553 case ZPOOL_PROP_AUTOEXPAND: 554 case ZPOOL_PROP_AUTOTRIM: 555 error = nvpair_value_uint64(elem, &intval); 556 if (!error && intval > 1) 557 error = SET_ERROR(EINVAL); 558 break; 559 560 case ZPOOL_PROP_MULTIHOST: 561 error = nvpair_value_uint64(elem, &intval); 562 if (!error && intval > 1) 563 error = SET_ERROR(EINVAL); 564 565 if (!error && !spa_get_hostid()) 566 error = SET_ERROR(ENOTSUP); 567 568 break; 569 570 case ZPOOL_PROP_BOOTFS: 571 /* 572 * If the pool version is less than SPA_VERSION_BOOTFS, 573 * or the pool is still being created (version == 0), 574 * the bootfs property cannot be set. 575 */ 576 if (spa_version(spa) < SPA_VERSION_BOOTFS) { 577 error = SET_ERROR(ENOTSUP); 578 break; 579 } 580 581 /* 582 * Make sure the vdev config is bootable 583 */ 584 if (!vdev_is_bootable(spa->spa_root_vdev)) { 585 error = SET_ERROR(ENOTSUP); 586 break; 587 } 588 589 reset_bootfs = 1; 590 591 error = nvpair_value_string(elem, &strval); 592 593 if (!error) { 594 objset_t *os; 595 uint64_t propval; 596 597 if (strval == NULL || strval[0] == '\0') { 598 objnum = zpool_prop_default_numeric( 599 ZPOOL_PROP_BOOTFS); 600 break; 601 } 602 603 error = dmu_objset_hold(strval, FTAG, &os); 604 if (error != 0) 605 break; 606 607 /* 608 * Must be ZPL, and its property settings 609 * must be supported. 610 */ 611 612 if (dmu_objset_type(os) != DMU_OST_ZFS) { 613 error = SET_ERROR(ENOTSUP); 614 } else if ((error = 615 dsl_prop_get_int_ds(dmu_objset_ds(os), 616 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 617 &propval)) == 0 && 618 !BOOTFS_COMPRESS_VALID(propval)) { 619 error = SET_ERROR(ENOTSUP); 620 } else { 621 objnum = dmu_objset_id(os); 622 } 623 dmu_objset_rele(os, FTAG); 624 } 625 break; 626 627 case ZPOOL_PROP_FAILUREMODE: 628 error = nvpair_value_uint64(elem, &intval); 629 if (!error && (intval < ZIO_FAILURE_MODE_WAIT || 630 intval > ZIO_FAILURE_MODE_PANIC)) 631 error = SET_ERROR(EINVAL); 632 633 /* 634 * This is a special case which only occurs when 635 * the pool has completely failed. This allows 636 * the user to change the in-core failmode property 637 * without syncing it out to disk (I/Os might 638 * currently be blocked). We do this by returning 639 * EIO to the caller (spa_prop_set) to trick it 640 * into thinking we encountered a property validation 641 * error. 642 */ 643 if (!error && spa_suspended(spa)) { 644 spa->spa_failmode = intval; 645 error = SET_ERROR(EIO); 646 } 647 break; 648 649 case ZPOOL_PROP_CACHEFILE: 650 if ((error = nvpair_value_string(elem, &strval)) != 0) 651 break; 652 653 if (strval[0] == '\0') 654 break; 655 656 if (strcmp(strval, "none") == 0) 657 break; 658 659 if (strval[0] != '/') { 660 error = SET_ERROR(EINVAL); 661 break; 662 } 663 664 slash = strrchr(strval, '/'); 665 ASSERT(slash != NULL); 666 667 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || 668 strcmp(slash, "/..") == 0) 669 error = SET_ERROR(EINVAL); 670 break; 671 672 case ZPOOL_PROP_COMMENT: 673 if ((error = nvpair_value_string(elem, &strval)) != 0) 674 break; 675 for (check = strval; *check != '\0'; check++) { 676 /* 677 * The kernel doesn't have an easy isprint() 678 * check. For this kernel check, we merely 679 * check ASCII apart from DEL. Fix this if 680 * there is an easy-to-use kernel isprint(). 681 */ 682 if (*check >= 0x7f) { 683 error = SET_ERROR(EINVAL); 684 break; 685 } 686 } 687 if (strlen(strval) > ZPROP_MAX_COMMENT) 688 error = E2BIG; 689 break; 690 691 case ZPOOL_PROP_DEDUPDITTO: 692 if (spa_version(spa) < SPA_VERSION_DEDUP) 693 error = SET_ERROR(ENOTSUP); 694 else 695 error = nvpair_value_uint64(elem, &intval); 696 if (error == 0 && 697 intval != 0 && intval < ZIO_DEDUPDITTO_MIN) 698 error = SET_ERROR(EINVAL); 699 break; 700 } 701 702 if (error) 703 break; 704 } 705 706 if (!error && reset_bootfs) { 707 error = nvlist_remove(props, 708 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); 709 710 if (!error) { 711 error = nvlist_add_uint64(props, 712 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); 713 } 714 } 715 716 return (error); 717 } 718 719 void 720 spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) 721 { 722 char *cachefile; 723 spa_config_dirent_t *dp; 724 725 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), 726 &cachefile) != 0) 727 return; 728 729 dp = kmem_alloc(sizeof (spa_config_dirent_t), 730 KM_SLEEP); 731 732 if (cachefile[0] == '\0') 733 dp->scd_path = spa_strdup(spa_config_path); 734 else if (strcmp(cachefile, "none") == 0) 735 dp->scd_path = NULL; 736 else 737 dp->scd_path = spa_strdup(cachefile); 738 739 list_insert_head(&spa->spa_config_list, dp); 740 if (need_sync) 741 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 742 } 743 744 int 745 spa_prop_set(spa_t *spa, nvlist_t *nvp) 746 { 747 int error; 748 nvpair_t *elem = NULL; 749 boolean_t need_sync = B_FALSE; 750 751 if ((error = spa_prop_validate(spa, nvp)) != 0) 752 return (error); 753 754 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { 755 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem)); 756 757 if (prop == ZPOOL_PROP_CACHEFILE || 758 prop == ZPOOL_PROP_ALTROOT || 759 prop == ZPOOL_PROP_READONLY) 760 continue; 761 762 if (prop == ZPOOL_PROP_VERSION || prop == ZPOOL_PROP_INVAL) { 763 uint64_t ver; 764 765 if (prop == ZPOOL_PROP_VERSION) { 766 VERIFY(nvpair_value_uint64(elem, &ver) == 0); 767 } else { 768 ASSERT(zpool_prop_feature(nvpair_name(elem))); 769 ver = SPA_VERSION_FEATURES; 770 need_sync = B_TRUE; 771 } 772 773 /* Save time if the version is already set. */ 774 if (ver == spa_version(spa)) 775 continue; 776 777 /* 778 * In addition to the pool directory object, we might 779 * create the pool properties object, the features for 780 * read object, the features for write object, or the 781 * feature descriptions object. 782 */ 783 error = dsl_sync_task(spa->spa_name, NULL, 784 spa_sync_version, &ver, 785 6, ZFS_SPACE_CHECK_RESERVED); 786 if (error) 787 return (error); 788 continue; 789 } 790 791 need_sync = B_TRUE; 792 break; 793 } 794 795 if (need_sync) { 796 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props, 797 nvp, 6, ZFS_SPACE_CHECK_RESERVED)); 798 } 799 800 return (0); 801 } 802 803 /* 804 * If the bootfs property value is dsobj, clear it. 805 */ 806 void 807 spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) 808 { 809 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { 810 VERIFY(zap_remove(spa->spa_meta_objset, 811 spa->spa_pool_props_object, 812 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); 813 spa->spa_bootfs = 0; 814 } 815 } 816 817 /*ARGSUSED*/ 818 static int 819 spa_change_guid_check(void *arg, dmu_tx_t *tx) 820 { 821 uint64_t *newguid = arg; 822 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 823 vdev_t *rvd = spa->spa_root_vdev; 824 uint64_t vdev_state; 825 826 if (spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT)) { 827 int error = (spa_has_checkpoint(spa)) ? 828 ZFS_ERR_CHECKPOINT_EXISTS : ZFS_ERR_DISCARDING_CHECKPOINT; 829 return (SET_ERROR(error)); 830 } 831 832 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 833 vdev_state = rvd->vdev_state; 834 spa_config_exit(spa, SCL_STATE, FTAG); 835 836 if (vdev_state != VDEV_STATE_HEALTHY) 837 return (SET_ERROR(ENXIO)); 838 839 ASSERT3U(spa_guid(spa), !=, *newguid); 840 841 return (0); 842 } 843 844 static void 845 spa_change_guid_sync(void *arg, dmu_tx_t *tx) 846 { 847 uint64_t *newguid = arg; 848 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 849 uint64_t oldguid; 850 vdev_t *rvd = spa->spa_root_vdev; 851 852 oldguid = spa_guid(spa); 853 854 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 855 rvd->vdev_guid = *newguid; 856 rvd->vdev_guid_sum += (*newguid - oldguid); 857 vdev_config_dirty(rvd); 858 spa_config_exit(spa, SCL_STATE, FTAG); 859 860 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu", 861 oldguid, *newguid); 862 } 863 864 /* 865 * Change the GUID for the pool. This is done so that we can later 866 * re-import a pool built from a clone of our own vdevs. We will modify 867 * the root vdev's guid, our own pool guid, and then mark all of our 868 * vdevs dirty. Note that we must make sure that all our vdevs are 869 * online when we do this, or else any vdevs that weren't present 870 * would be orphaned from our pool. We are also going to issue a 871 * sysevent to update any watchers. 872 */ 873 int 874 spa_change_guid(spa_t *spa) 875 { 876 int error; 877 uint64_t guid; 878 879 mutex_enter(&spa->spa_vdev_top_lock); 880 mutex_enter(&spa_namespace_lock); 881 guid = spa_generate_guid(NULL); 882 883 error = dsl_sync_task(spa->spa_name, spa_change_guid_check, 884 spa_change_guid_sync, &guid, 5, ZFS_SPACE_CHECK_RESERVED); 885 886 if (error == 0) { 887 spa_write_cachefile(spa, B_FALSE, B_TRUE); 888 spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_REGUID); 889 } 890 891 mutex_exit(&spa_namespace_lock); 892 mutex_exit(&spa->spa_vdev_top_lock); 893 894 return (error); 895 } 896 897 /* 898 * ========================================================================== 899 * SPA state manipulation (open/create/destroy/import/export) 900 * ========================================================================== 901 */ 902 903 static int 904 spa_error_entry_compare(const void *a, const void *b) 905 { 906 const spa_error_entry_t *sa = (const spa_error_entry_t *)a; 907 const spa_error_entry_t *sb = (const spa_error_entry_t *)b; 908 int ret; 909 910 ret = memcmp(&sa->se_bookmark, &sb->se_bookmark, 911 sizeof (zbookmark_phys_t)); 912 913 return (AVL_ISIGN(ret)); 914 } 915 916 /* 917 * Utility function which retrieves copies of the current logs and 918 * re-initializes them in the process. 919 */ 920 void 921 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) 922 { 923 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); 924 925 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); 926 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); 927 928 avl_create(&spa->spa_errlist_scrub, 929 spa_error_entry_compare, sizeof (spa_error_entry_t), 930 offsetof(spa_error_entry_t, se_avl)); 931 avl_create(&spa->spa_errlist_last, 932 spa_error_entry_compare, sizeof (spa_error_entry_t), 933 offsetof(spa_error_entry_t, se_avl)); 934 } 935 936 static void 937 spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 938 { 939 const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; 940 enum zti_modes mode = ztip->zti_mode; 941 uint_t value = ztip->zti_value; 942 uint_t count = ztip->zti_count; 943 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 944 char name[32]; 945 uint_t flags = 0; 946 boolean_t batch = B_FALSE; 947 948 if (mode == ZTI_MODE_NULL) { 949 tqs->stqs_count = 0; 950 tqs->stqs_taskq = NULL; 951 return; 952 } 953 954 ASSERT3U(count, >, 0); 955 956 tqs->stqs_count = count; 957 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP); 958 959 switch (mode) { 960 case ZTI_MODE_FIXED: 961 ASSERT3U(value, >=, 1); 962 value = MAX(value, 1); 963 break; 964 965 case ZTI_MODE_BATCH: 966 batch = B_TRUE; 967 flags |= TASKQ_THREADS_CPU_PCT; 968 value = zio_taskq_batch_pct; 969 break; 970 971 default: 972 panic("unrecognized mode for %s_%s taskq (%u:%u) in " 973 "spa_activate()", 974 zio_type_name[t], zio_taskq_types[q], mode, value); 975 break; 976 } 977 978 for (uint_t i = 0; i < count; i++) { 979 taskq_t *tq; 980 981 if (count > 1) { 982 (void) snprintf(name, sizeof (name), "%s_%s_%u", 983 zio_type_name[t], zio_taskq_types[q], i); 984 } else { 985 (void) snprintf(name, sizeof (name), "%s_%s", 986 zio_type_name[t], zio_taskq_types[q]); 987 } 988 989 if (zio_taskq_sysdc && spa->spa_proc != &p0) { 990 if (batch) 991 flags |= TASKQ_DC_BATCH; 992 993 tq = taskq_create_sysdc(name, value, 50, INT_MAX, 994 spa->spa_proc, zio_taskq_basedc, flags); 995 } else { 996 pri_t pri = maxclsyspri; 997 /* 998 * The write issue taskq can be extremely CPU 999 * intensive. Run it at slightly lower priority 1000 * than the other taskqs. 1001 */ 1002 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE) 1003 pri--; 1004 1005 tq = taskq_create_proc(name, value, pri, 50, 1006 INT_MAX, spa->spa_proc, flags); 1007 } 1008 1009 tqs->stqs_taskq[i] = tq; 1010 } 1011 } 1012 1013 static void 1014 spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 1015 { 1016 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 1017 1018 if (tqs->stqs_taskq == NULL) { 1019 ASSERT0(tqs->stqs_count); 1020 return; 1021 } 1022 1023 for (uint_t i = 0; i < tqs->stqs_count; i++) { 1024 ASSERT3P(tqs->stqs_taskq[i], !=, NULL); 1025 taskq_destroy(tqs->stqs_taskq[i]); 1026 } 1027 1028 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *)); 1029 tqs->stqs_taskq = NULL; 1030 } 1031 1032 /* 1033 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority. 1034 * Note that a type may have multiple discrete taskqs to avoid lock contention 1035 * on the taskq itself. In that case we choose which taskq at random by using 1036 * the low bits of gethrtime(). 1037 */ 1038 void 1039 spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 1040 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent) 1041 { 1042 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 1043 taskq_t *tq; 1044 1045 ASSERT3P(tqs->stqs_taskq, !=, NULL); 1046 ASSERT3U(tqs->stqs_count, !=, 0); 1047 1048 if (tqs->stqs_count == 1) { 1049 tq = tqs->stqs_taskq[0]; 1050 } else { 1051 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; 1052 } 1053 1054 taskq_dispatch_ent(tq, func, arg, flags, ent); 1055 } 1056 1057 static void 1058 spa_create_zio_taskqs(spa_t *spa) 1059 { 1060 for (int t = 0; t < ZIO_TYPES; t++) { 1061 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1062 spa_taskqs_init(spa, t, q); 1063 } 1064 } 1065 } 1066 1067 #ifdef _KERNEL 1068 static void 1069 spa_thread(void *arg) 1070 { 1071 callb_cpr_t cprinfo; 1072 1073 spa_t *spa = arg; 1074 user_t *pu = PTOU(curproc); 1075 1076 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 1077 spa->spa_name); 1078 1079 ASSERT(curproc != &p0); 1080 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 1081 "zpool-%s", spa->spa_name); 1082 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 1083 1084 /* bind this thread to the requested psrset */ 1085 if (zio_taskq_psrset_bind != PS_NONE) { 1086 pool_lock(); 1087 mutex_enter(&cpu_lock); 1088 mutex_enter(&pidlock); 1089 mutex_enter(&curproc->p_lock); 1090 1091 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 1092 0, NULL, NULL) == 0) { 1093 curthread->t_bind_pset = zio_taskq_psrset_bind; 1094 } else { 1095 cmn_err(CE_WARN, 1096 "Couldn't bind process for zfs pool \"%s\" to " 1097 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 1098 } 1099 1100 mutex_exit(&curproc->p_lock); 1101 mutex_exit(&pidlock); 1102 mutex_exit(&cpu_lock); 1103 pool_unlock(); 1104 } 1105 1106 if (zio_taskq_sysdc) { 1107 sysdc_thread_enter(curthread, 100, 0); 1108 } 1109 1110 spa->spa_proc = curproc; 1111 spa->spa_did = curthread->t_did; 1112 1113 spa_create_zio_taskqs(spa); 1114 1115 mutex_enter(&spa->spa_proc_lock); 1116 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 1117 1118 spa->spa_proc_state = SPA_PROC_ACTIVE; 1119 cv_broadcast(&spa->spa_proc_cv); 1120 1121 CALLB_CPR_SAFE_BEGIN(&cprinfo); 1122 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 1123 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1124 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 1125 1126 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 1127 spa->spa_proc_state = SPA_PROC_GONE; 1128 spa->spa_proc = &p0; 1129 cv_broadcast(&spa->spa_proc_cv); 1130 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 1131 1132 mutex_enter(&curproc->p_lock); 1133 lwp_exit(); 1134 } 1135 #endif 1136 1137 /* 1138 * Activate an uninitialized pool. 1139 */ 1140 static void 1141 spa_activate(spa_t *spa, int mode) 1142 { 1143 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 1144 1145 spa->spa_state = POOL_STATE_ACTIVE; 1146 spa->spa_mode = mode; 1147 1148 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 1149 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 1150 spa->spa_special_class = metaslab_class_create(spa, zfs_metaslab_ops); 1151 spa->spa_dedup_class = metaslab_class_create(spa, zfs_metaslab_ops); 1152 1153 /* Try to create a covering process */ 1154 mutex_enter(&spa->spa_proc_lock); 1155 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 1156 ASSERT(spa->spa_proc == &p0); 1157 spa->spa_did = 0; 1158 1159 /* Only create a process if we're going to be around a while. */ 1160 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 1161 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 1162 NULL, 0) == 0) { 1163 spa->spa_proc_state = SPA_PROC_CREATED; 1164 while (spa->spa_proc_state == SPA_PROC_CREATED) { 1165 cv_wait(&spa->spa_proc_cv, 1166 &spa->spa_proc_lock); 1167 } 1168 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1169 ASSERT(spa->spa_proc != &p0); 1170 ASSERT(spa->spa_did != 0); 1171 } else { 1172 #ifdef _KERNEL 1173 cmn_err(CE_WARN, 1174 "Couldn't create process for zfs pool \"%s\"\n", 1175 spa->spa_name); 1176 #endif 1177 } 1178 } 1179 mutex_exit(&spa->spa_proc_lock); 1180 1181 /* If we didn't create a process, we need to create our taskqs. */ 1182 if (spa->spa_proc == &p0) { 1183 spa_create_zio_taskqs(spa); 1184 } 1185 1186 for (size_t i = 0; i < TXG_SIZE; i++) { 1187 spa->spa_txg_zio[i] = zio_root(spa, NULL, NULL, 1188 ZIO_FLAG_CANFAIL); 1189 } 1190 1191 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 1192 offsetof(vdev_t, vdev_config_dirty_node)); 1193 list_create(&spa->spa_evicting_os_list, sizeof (objset_t), 1194 offsetof(objset_t, os_evicting_node)); 1195 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 1196 offsetof(vdev_t, vdev_state_dirty_node)); 1197 1198 txg_list_create(&spa->spa_vdev_txg_list, spa, 1199 offsetof(struct vdev, vdev_txg_node)); 1200 1201 avl_create(&spa->spa_errlist_scrub, 1202 spa_error_entry_compare, sizeof (spa_error_entry_t), 1203 offsetof(spa_error_entry_t, se_avl)); 1204 avl_create(&spa->spa_errlist_last, 1205 spa_error_entry_compare, sizeof (spa_error_entry_t), 1206 offsetof(spa_error_entry_t, se_avl)); 1207 1208 spa_keystore_init(&spa->spa_keystore); 1209 1210 /* 1211 * The taskq to upgrade datasets in this pool. Currently used by 1212 * feature SPA_FEATURE_USEROBJ_ACCOUNTING/SPA_FEATURE_PROJECT_QUOTA. 1213 */ 1214 spa->spa_upgrade_taskq = taskq_create("z_upgrade", boot_ncpus, 1215 minclsyspri, 1, INT_MAX, TASKQ_DYNAMIC); 1216 } 1217 1218 /* 1219 * Opposite of spa_activate(). 1220 */ 1221 static void 1222 spa_deactivate(spa_t *spa) 1223 { 1224 ASSERT(spa->spa_sync_on == B_FALSE); 1225 ASSERT(spa->spa_dsl_pool == NULL); 1226 ASSERT(spa->spa_root_vdev == NULL); 1227 ASSERT(spa->spa_async_zio_root == NULL); 1228 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 1229 1230 spa_evicting_os_wait(spa); 1231 1232 if (spa->spa_upgrade_taskq) { 1233 taskq_destroy(spa->spa_upgrade_taskq); 1234 spa->spa_upgrade_taskq = NULL; 1235 } 1236 1237 txg_list_destroy(&spa->spa_vdev_txg_list); 1238 1239 list_destroy(&spa->spa_config_dirty_list); 1240 list_destroy(&spa->spa_evicting_os_list); 1241 list_destroy(&spa->spa_state_dirty_list); 1242 1243 for (int t = 0; t < ZIO_TYPES; t++) { 1244 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1245 spa_taskqs_fini(spa, t, q); 1246 } 1247 } 1248 1249 for (size_t i = 0; i < TXG_SIZE; i++) { 1250 ASSERT3P(spa->spa_txg_zio[i], !=, NULL); 1251 VERIFY0(zio_wait(spa->spa_txg_zio[i])); 1252 spa->spa_txg_zio[i] = NULL; 1253 } 1254 1255 metaslab_class_destroy(spa->spa_normal_class); 1256 spa->spa_normal_class = NULL; 1257 1258 metaslab_class_destroy(spa->spa_log_class); 1259 spa->spa_log_class = NULL; 1260 1261 metaslab_class_destroy(spa->spa_special_class); 1262 spa->spa_special_class = NULL; 1263 1264 metaslab_class_destroy(spa->spa_dedup_class); 1265 spa->spa_dedup_class = NULL; 1266 1267 /* 1268 * If this was part of an import or the open otherwise failed, we may 1269 * still have errors left in the queues. Empty them just in case. 1270 */ 1271 spa_errlog_drain(spa); 1272 avl_destroy(&spa->spa_errlist_scrub); 1273 avl_destroy(&spa->spa_errlist_last); 1274 1275 spa_keystore_fini(&spa->spa_keystore); 1276 1277 spa->spa_state = POOL_STATE_UNINITIALIZED; 1278 1279 mutex_enter(&spa->spa_proc_lock); 1280 if (spa->spa_proc_state != SPA_PROC_NONE) { 1281 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1282 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1283 cv_broadcast(&spa->spa_proc_cv); 1284 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1285 ASSERT(spa->spa_proc != &p0); 1286 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1287 } 1288 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1289 spa->spa_proc_state = SPA_PROC_NONE; 1290 } 1291 ASSERT(spa->spa_proc == &p0); 1292 mutex_exit(&spa->spa_proc_lock); 1293 1294 /* 1295 * We want to make sure spa_thread() has actually exited the ZFS 1296 * module, so that the module can't be unloaded out from underneath 1297 * it. 1298 */ 1299 if (spa->spa_did != 0) { 1300 thread_join(spa->spa_did); 1301 spa->spa_did = 0; 1302 } 1303 } 1304 1305 /* 1306 * Verify a pool configuration, and construct the vdev tree appropriately. This 1307 * will create all the necessary vdevs in the appropriate layout, with each vdev 1308 * in the CLOSED state. This will prep the pool before open/creation/import. 1309 * All vdev validation is done by the vdev_alloc() routine. 1310 */ 1311 static int 1312 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1313 uint_t id, int atype) 1314 { 1315 nvlist_t **child; 1316 uint_t children; 1317 int error; 1318 1319 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1320 return (error); 1321 1322 if ((*vdp)->vdev_ops->vdev_op_leaf) 1323 return (0); 1324 1325 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1326 &child, &children); 1327 1328 if (error == ENOENT) 1329 return (0); 1330 1331 if (error) { 1332 vdev_free(*vdp); 1333 *vdp = NULL; 1334 return (SET_ERROR(EINVAL)); 1335 } 1336 1337 for (int c = 0; c < children; c++) { 1338 vdev_t *vd; 1339 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1340 atype)) != 0) { 1341 vdev_free(*vdp); 1342 *vdp = NULL; 1343 return (error); 1344 } 1345 } 1346 1347 ASSERT(*vdp != NULL); 1348 1349 return (0); 1350 } 1351 1352 /* 1353 * Opposite of spa_load(). 1354 */ 1355 static void 1356 spa_unload(spa_t *spa) 1357 { 1358 int i; 1359 1360 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1361 1362 spa_load_note(spa, "UNLOADING"); 1363 1364 /* 1365 * Stop async tasks. 1366 */ 1367 spa_async_suspend(spa); 1368 1369 if (spa->spa_root_vdev) { 1370 vdev_t *root_vdev = spa->spa_root_vdev; 1371 vdev_initialize_stop_all(root_vdev, VDEV_INITIALIZE_ACTIVE); 1372 vdev_trim_stop_all(root_vdev, VDEV_TRIM_ACTIVE); 1373 vdev_autotrim_stop_all(spa); 1374 } 1375 1376 /* 1377 * Stop syncing. 1378 */ 1379 if (spa->spa_sync_on) { 1380 txg_sync_stop(spa->spa_dsl_pool); 1381 spa->spa_sync_on = B_FALSE; 1382 } 1383 1384 /* 1385 * Even though vdev_free() also calls vdev_metaslab_fini, we need 1386 * to call it earlier, before we wait for async i/o to complete. 1387 * This ensures that there is no async metaslab prefetching, by 1388 * calling taskq_wait(mg_taskq). 1389 */ 1390 if (spa->spa_root_vdev != NULL) { 1391 spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); 1392 for (int c = 0; c < spa->spa_root_vdev->vdev_children; c++) 1393 vdev_metaslab_fini(spa->spa_root_vdev->vdev_child[c]); 1394 spa_config_exit(spa, SCL_ALL, spa); 1395 } 1396 1397 if (spa->spa_mmp.mmp_thread) 1398 mmp_thread_stop(spa); 1399 1400 /* 1401 * Wait for any outstanding async I/O to complete. 1402 */ 1403 if (spa->spa_async_zio_root != NULL) { 1404 for (int i = 0; i < max_ncpus; i++) 1405 (void) zio_wait(spa->spa_async_zio_root[i]); 1406 kmem_free(spa->spa_async_zio_root, max_ncpus * sizeof (void *)); 1407 spa->spa_async_zio_root = NULL; 1408 } 1409 1410 if (spa->spa_vdev_removal != NULL) { 1411 spa_vdev_removal_destroy(spa->spa_vdev_removal); 1412 spa->spa_vdev_removal = NULL; 1413 } 1414 1415 if (spa->spa_condense_zthr != NULL) { 1416 zthr_destroy(spa->spa_condense_zthr); 1417 spa->spa_condense_zthr = NULL; 1418 } 1419 1420 if (spa->spa_checkpoint_discard_zthr != NULL) { 1421 zthr_destroy(spa->spa_checkpoint_discard_zthr); 1422 spa->spa_checkpoint_discard_zthr = NULL; 1423 } 1424 1425 spa_condense_fini(spa); 1426 1427 bpobj_close(&spa->spa_deferred_bpobj); 1428 1429 spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); 1430 1431 /* 1432 * Close all vdevs. 1433 */ 1434 if (spa->spa_root_vdev) 1435 vdev_free(spa->spa_root_vdev); 1436 ASSERT(spa->spa_root_vdev == NULL); 1437 1438 /* 1439 * Close the dsl pool. 1440 */ 1441 if (spa->spa_dsl_pool) { 1442 dsl_pool_close(spa->spa_dsl_pool); 1443 spa->spa_dsl_pool = NULL; 1444 spa->spa_meta_objset = NULL; 1445 } 1446 1447 ddt_unload(spa); 1448 1449 /* 1450 * Drop and purge level 2 cache 1451 */ 1452 spa_l2cache_drop(spa); 1453 1454 for (i = 0; i < spa->spa_spares.sav_count; i++) 1455 vdev_free(spa->spa_spares.sav_vdevs[i]); 1456 if (spa->spa_spares.sav_vdevs) { 1457 kmem_free(spa->spa_spares.sav_vdevs, 1458 spa->spa_spares.sav_count * sizeof (void *)); 1459 spa->spa_spares.sav_vdevs = NULL; 1460 } 1461 if (spa->spa_spares.sav_config) { 1462 nvlist_free(spa->spa_spares.sav_config); 1463 spa->spa_spares.sav_config = NULL; 1464 } 1465 spa->spa_spares.sav_count = 0; 1466 1467 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 1468 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1469 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1470 } 1471 if (spa->spa_l2cache.sav_vdevs) { 1472 kmem_free(spa->spa_l2cache.sav_vdevs, 1473 spa->spa_l2cache.sav_count * sizeof (void *)); 1474 spa->spa_l2cache.sav_vdevs = NULL; 1475 } 1476 if (spa->spa_l2cache.sav_config) { 1477 nvlist_free(spa->spa_l2cache.sav_config); 1478 spa->spa_l2cache.sav_config = NULL; 1479 } 1480 spa->spa_l2cache.sav_count = 0; 1481 1482 spa->spa_async_suspended = 0; 1483 1484 spa->spa_indirect_vdevs_loaded = B_FALSE; 1485 1486 if (spa->spa_comment != NULL) { 1487 spa_strfree(spa->spa_comment); 1488 spa->spa_comment = NULL; 1489 } 1490 1491 spa_config_exit(spa, SCL_ALL, spa); 1492 } 1493 1494 /* 1495 * Load (or re-load) the current list of vdevs describing the active spares for 1496 * this pool. When this is called, we have some form of basic information in 1497 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1498 * then re-generate a more complete list including status information. 1499 */ 1500 void 1501 spa_load_spares(spa_t *spa) 1502 { 1503 nvlist_t **spares; 1504 uint_t nspares; 1505 int i; 1506 vdev_t *vd, *tvd; 1507 1508 #ifndef _KERNEL 1509 /* 1510 * zdb opens both the current state of the pool and the 1511 * checkpointed state (if present), with a different spa_t. 1512 * 1513 * As spare vdevs are shared among open pools, we skip loading 1514 * them when we load the checkpointed state of the pool. 1515 */ 1516 if (!spa_writeable(spa)) 1517 return; 1518 #endif 1519 1520 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1521 1522 /* 1523 * First, close and free any existing spare vdevs. 1524 */ 1525 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1526 vd = spa->spa_spares.sav_vdevs[i]; 1527 1528 /* Undo the call to spa_activate() below */ 1529 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1530 B_FALSE)) != NULL && tvd->vdev_isspare) 1531 spa_spare_remove(tvd); 1532 vdev_close(vd); 1533 vdev_free(vd); 1534 } 1535 1536 if (spa->spa_spares.sav_vdevs) 1537 kmem_free(spa->spa_spares.sav_vdevs, 1538 spa->spa_spares.sav_count * sizeof (void *)); 1539 1540 if (spa->spa_spares.sav_config == NULL) 1541 nspares = 0; 1542 else 1543 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1544 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1545 1546 spa->spa_spares.sav_count = (int)nspares; 1547 spa->spa_spares.sav_vdevs = NULL; 1548 1549 if (nspares == 0) 1550 return; 1551 1552 /* 1553 * Construct the array of vdevs, opening them to get status in the 1554 * process. For each spare, there is potentially two different vdev_t 1555 * structures associated with it: one in the list of spares (used only 1556 * for basic validation purposes) and one in the active vdev 1557 * configuration (if it's spared in). During this phase we open and 1558 * validate each vdev on the spare list. If the vdev also exists in the 1559 * active configuration, then we also mark this vdev as an active spare. 1560 */ 1561 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1562 KM_SLEEP); 1563 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1564 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1565 VDEV_ALLOC_SPARE) == 0); 1566 ASSERT(vd != NULL); 1567 1568 spa->spa_spares.sav_vdevs[i] = vd; 1569 1570 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1571 B_FALSE)) != NULL) { 1572 if (!tvd->vdev_isspare) 1573 spa_spare_add(tvd); 1574 1575 /* 1576 * We only mark the spare active if we were successfully 1577 * able to load the vdev. Otherwise, importing a pool 1578 * with a bad active spare would result in strange 1579 * behavior, because multiple pool would think the spare 1580 * is actively in use. 1581 * 1582 * There is a vulnerability here to an equally bizarre 1583 * circumstance, where a dead active spare is later 1584 * brought back to life (onlined or otherwise). Given 1585 * the rarity of this scenario, and the extra complexity 1586 * it adds, we ignore the possibility. 1587 */ 1588 if (!vdev_is_dead(tvd)) 1589 spa_spare_activate(tvd); 1590 } 1591 1592 vd->vdev_top = vd; 1593 vd->vdev_aux = &spa->spa_spares; 1594 1595 if (vdev_open(vd) != 0) 1596 continue; 1597 1598 if (vdev_validate_aux(vd) == 0) 1599 spa_spare_add(vd); 1600 } 1601 1602 /* 1603 * Recompute the stashed list of spares, with status information 1604 * this time. 1605 */ 1606 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1607 DATA_TYPE_NVLIST_ARRAY) == 0); 1608 1609 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1610 KM_SLEEP); 1611 for (i = 0; i < spa->spa_spares.sav_count; i++) 1612 spares[i] = vdev_config_generate(spa, 1613 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1614 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1615 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1616 for (i = 0; i < spa->spa_spares.sav_count; i++) 1617 nvlist_free(spares[i]); 1618 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1619 } 1620 1621 /* 1622 * Load (or re-load) the current list of vdevs describing the active l2cache for 1623 * this pool. When this is called, we have some form of basic information in 1624 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1625 * then re-generate a more complete list including status information. 1626 * Devices which are already active have their details maintained, and are 1627 * not re-opened. 1628 */ 1629 void 1630 spa_load_l2cache(spa_t *spa) 1631 { 1632 nvlist_t **l2cache; 1633 uint_t nl2cache; 1634 int i, j, oldnvdevs; 1635 uint64_t guid; 1636 vdev_t *vd, **oldvdevs, **newvdevs; 1637 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1638 1639 #ifndef _KERNEL 1640 /* 1641 * zdb opens both the current state of the pool and the 1642 * checkpointed state (if present), with a different spa_t. 1643 * 1644 * As L2 caches are part of the ARC which is shared among open 1645 * pools, we skip loading them when we load the checkpointed 1646 * state of the pool. 1647 */ 1648 if (!spa_writeable(spa)) 1649 return; 1650 #endif 1651 1652 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1653 1654 if (sav->sav_config != NULL) { 1655 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1656 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1657 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); 1658 } else { 1659 nl2cache = 0; 1660 newvdevs = NULL; 1661 } 1662 1663 oldvdevs = sav->sav_vdevs; 1664 oldnvdevs = sav->sav_count; 1665 sav->sav_vdevs = NULL; 1666 sav->sav_count = 0; 1667 1668 /* 1669 * Process new nvlist of vdevs. 1670 */ 1671 for (i = 0; i < nl2cache; i++) { 1672 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1673 &guid) == 0); 1674 1675 newvdevs[i] = NULL; 1676 for (j = 0; j < oldnvdevs; j++) { 1677 vd = oldvdevs[j]; 1678 if (vd != NULL && guid == vd->vdev_guid) { 1679 /* 1680 * Retain previous vdev for add/remove ops. 1681 */ 1682 newvdevs[i] = vd; 1683 oldvdevs[j] = NULL; 1684 break; 1685 } 1686 } 1687 1688 if (newvdevs[i] == NULL) { 1689 /* 1690 * Create new vdev 1691 */ 1692 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1693 VDEV_ALLOC_L2CACHE) == 0); 1694 ASSERT(vd != NULL); 1695 newvdevs[i] = vd; 1696 1697 /* 1698 * Commit this vdev as an l2cache device, 1699 * even if it fails to open. 1700 */ 1701 spa_l2cache_add(vd); 1702 1703 vd->vdev_top = vd; 1704 vd->vdev_aux = sav; 1705 1706 spa_l2cache_activate(vd); 1707 1708 if (vdev_open(vd) != 0) 1709 continue; 1710 1711 (void) vdev_validate_aux(vd); 1712 1713 if (!vdev_is_dead(vd)) 1714 l2arc_add_vdev(spa, vd); 1715 } 1716 } 1717 1718 /* 1719 * Purge vdevs that were dropped 1720 */ 1721 for (i = 0; i < oldnvdevs; i++) { 1722 uint64_t pool; 1723 1724 vd = oldvdevs[i]; 1725 if (vd != NULL) { 1726 ASSERT(vd->vdev_isl2cache); 1727 1728 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1729 pool != 0ULL && l2arc_vdev_present(vd)) 1730 l2arc_remove_vdev(vd); 1731 vdev_clear_stats(vd); 1732 vdev_free(vd); 1733 } 1734 } 1735 1736 if (oldvdevs) 1737 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1738 1739 if (sav->sav_config == NULL) 1740 goto out; 1741 1742 sav->sav_vdevs = newvdevs; 1743 sav->sav_count = (int)nl2cache; 1744 1745 /* 1746 * Recompute the stashed list of l2cache devices, with status 1747 * information this time. 1748 */ 1749 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1750 DATA_TYPE_NVLIST_ARRAY) == 0); 1751 1752 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 1753 for (i = 0; i < sav->sav_count; i++) 1754 l2cache[i] = vdev_config_generate(spa, 1755 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1756 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1757 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1758 out: 1759 for (i = 0; i < sav->sav_count; i++) 1760 nvlist_free(l2cache[i]); 1761 if (sav->sav_count) 1762 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1763 } 1764 1765 static int 1766 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1767 { 1768 dmu_buf_t *db; 1769 char *packed = NULL; 1770 size_t nvsize = 0; 1771 int error; 1772 *value = NULL; 1773 1774 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); 1775 if (error != 0) 1776 return (error); 1777 1778 nvsize = *(uint64_t *)db->db_data; 1779 dmu_buf_rele(db, FTAG); 1780 1781 packed = kmem_alloc(nvsize, KM_SLEEP); 1782 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1783 DMU_READ_PREFETCH); 1784 if (error == 0) 1785 error = nvlist_unpack(packed, nvsize, value, 0); 1786 kmem_free(packed, nvsize); 1787 1788 return (error); 1789 } 1790 1791 /* 1792 * Concrete top-level vdevs that are not missing and are not logs. At every 1793 * spa_sync we write new uberblocks to at least SPA_SYNC_MIN_VDEVS core tvds. 1794 */ 1795 static uint64_t 1796 spa_healthy_core_tvds(spa_t *spa) 1797 { 1798 vdev_t *rvd = spa->spa_root_vdev; 1799 uint64_t tvds = 0; 1800 1801 for (uint64_t i = 0; i < rvd->vdev_children; i++) { 1802 vdev_t *vd = rvd->vdev_child[i]; 1803 if (vd->vdev_islog) 1804 continue; 1805 if (vdev_is_concrete(vd) && !vdev_is_dead(vd)) 1806 tvds++; 1807 } 1808 1809 return (tvds); 1810 } 1811 1812 /* 1813 * Checks to see if the given vdev could not be opened, in which case we post a 1814 * sysevent to notify the autoreplace code that the device has been removed. 1815 */ 1816 static void 1817 spa_check_removed(vdev_t *vd) 1818 { 1819 for (uint64_t c = 0; c < vd->vdev_children; c++) 1820 spa_check_removed(vd->vdev_child[c]); 1821 1822 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && 1823 vdev_is_concrete(vd)) { 1824 zfs_post_autoreplace(vd->vdev_spa, vd); 1825 spa_event_notify(vd->vdev_spa, vd, NULL, ESC_ZFS_VDEV_CHECK); 1826 } 1827 } 1828 1829 static int 1830 spa_check_for_missing_logs(spa_t *spa) 1831 { 1832 vdev_t *rvd = spa->spa_root_vdev; 1833 1834 /* 1835 * If we're doing a normal import, then build up any additional 1836 * diagnostic information about missing log devices. 1837 * We'll pass this up to the user for further processing. 1838 */ 1839 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1840 nvlist_t **child, *nv; 1841 uint64_t idx = 0; 1842 1843 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1844 KM_SLEEP); 1845 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1846 1847 for (uint64_t c = 0; c < rvd->vdev_children; c++) { 1848 vdev_t *tvd = rvd->vdev_child[c]; 1849 1850 /* 1851 * We consider a device as missing only if it failed 1852 * to open (i.e. offline or faulted is not considered 1853 * as missing). 1854 */ 1855 if (tvd->vdev_islog && 1856 tvd->vdev_state == VDEV_STATE_CANT_OPEN) { 1857 child[idx++] = vdev_config_generate(spa, tvd, 1858 B_FALSE, VDEV_CONFIG_MISSING); 1859 } 1860 } 1861 1862 if (idx > 0) { 1863 fnvlist_add_nvlist_array(nv, 1864 ZPOOL_CONFIG_CHILDREN, child, idx); 1865 fnvlist_add_nvlist(spa->spa_load_info, 1866 ZPOOL_CONFIG_MISSING_DEVICES, nv); 1867 1868 for (uint64_t i = 0; i < idx; i++) 1869 nvlist_free(child[i]); 1870 } 1871 nvlist_free(nv); 1872 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1873 1874 if (idx > 0) { 1875 spa_load_failed(spa, "some log devices are missing"); 1876 vdev_dbgmsg_print_tree(rvd, 2); 1877 return (SET_ERROR(ENXIO)); 1878 } 1879 } else { 1880 for (uint64_t c = 0; c < rvd->vdev_children; c++) { 1881 vdev_t *tvd = rvd->vdev_child[c]; 1882 1883 if (tvd->vdev_islog && 1884 tvd->vdev_state == VDEV_STATE_CANT_OPEN) { 1885 spa_set_log_state(spa, SPA_LOG_CLEAR); 1886 spa_load_note(spa, "some log devices are " 1887 "missing, ZIL is dropped."); 1888 vdev_dbgmsg_print_tree(rvd, 2); 1889 break; 1890 } 1891 } 1892 } 1893 1894 return (0); 1895 } 1896 1897 /* 1898 * Check for missing log devices 1899 */ 1900 static boolean_t 1901 spa_check_logs(spa_t *spa) 1902 { 1903 boolean_t rv = B_FALSE; 1904 dsl_pool_t *dp = spa_get_dsl(spa); 1905 1906 switch (spa->spa_log_state) { 1907 case SPA_LOG_MISSING: 1908 /* need to recheck in case slog has been restored */ 1909 case SPA_LOG_UNKNOWN: 1910 rv = (dmu_objset_find_dp(dp, dp->dp_root_dir_obj, 1911 zil_check_log_chain, NULL, DS_FIND_CHILDREN) != 0); 1912 if (rv) 1913 spa_set_log_state(spa, SPA_LOG_MISSING); 1914 break; 1915 } 1916 return (rv); 1917 } 1918 1919 static boolean_t 1920 spa_passivate_log(spa_t *spa) 1921 { 1922 vdev_t *rvd = spa->spa_root_vdev; 1923 boolean_t slog_found = B_FALSE; 1924 1925 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1926 1927 if (!spa_has_slogs(spa)) 1928 return (B_FALSE); 1929 1930 for (int c = 0; c < rvd->vdev_children; c++) { 1931 vdev_t *tvd = rvd->vdev_child[c]; 1932 metaslab_group_t *mg = tvd->vdev_mg; 1933 1934 if (tvd->vdev_islog) { 1935 metaslab_group_passivate(mg); 1936 slog_found = B_TRUE; 1937 } 1938 } 1939 1940 return (slog_found); 1941 } 1942 1943 static void 1944 spa_activate_log(spa_t *spa) 1945 { 1946 vdev_t *rvd = spa->spa_root_vdev; 1947 1948 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1949 1950 for (int c = 0; c < rvd->vdev_children; c++) { 1951 vdev_t *tvd = rvd->vdev_child[c]; 1952 metaslab_group_t *mg = tvd->vdev_mg; 1953 1954 if (tvd->vdev_islog) 1955 metaslab_group_activate(mg); 1956 } 1957 } 1958 1959 int 1960 spa_reset_logs(spa_t *spa) 1961 { 1962 int error; 1963 1964 error = dmu_objset_find(spa_name(spa), zil_reset, 1965 NULL, DS_FIND_CHILDREN); 1966 if (error == 0) { 1967 /* 1968 * We successfully offlined the log device, sync out the 1969 * current txg so that the "stubby" block can be removed 1970 * by zil_sync(). 1971 */ 1972 txg_wait_synced(spa->spa_dsl_pool, 0); 1973 } 1974 return (error); 1975 } 1976 1977 static void 1978 spa_aux_check_removed(spa_aux_vdev_t *sav) 1979 { 1980 for (int i = 0; i < sav->sav_count; i++) 1981 spa_check_removed(sav->sav_vdevs[i]); 1982 } 1983 1984 void 1985 spa_claim_notify(zio_t *zio) 1986 { 1987 spa_t *spa = zio->io_spa; 1988 1989 if (zio->io_error) 1990 return; 1991 1992 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 1993 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 1994 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 1995 mutex_exit(&spa->spa_props_lock); 1996 } 1997 1998 typedef struct spa_load_error { 1999 uint64_t sle_meta_count; 2000 uint64_t sle_data_count; 2001 } spa_load_error_t; 2002 2003 static void 2004 spa_load_verify_done(zio_t *zio) 2005 { 2006 blkptr_t *bp = zio->io_bp; 2007 spa_load_error_t *sle = zio->io_private; 2008 dmu_object_type_t type = BP_GET_TYPE(bp); 2009 int error = zio->io_error; 2010 spa_t *spa = zio->io_spa; 2011 2012 abd_free(zio->io_abd); 2013 if (error) { 2014 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 2015 type != DMU_OT_INTENT_LOG) 2016 atomic_inc_64(&sle->sle_meta_count); 2017 else 2018 atomic_inc_64(&sle->sle_data_count); 2019 } 2020 2021 mutex_enter(&spa->spa_scrub_lock); 2022 spa->spa_load_verify_ios--; 2023 cv_broadcast(&spa->spa_scrub_io_cv); 2024 mutex_exit(&spa->spa_scrub_lock); 2025 } 2026 2027 /* 2028 * Maximum number of concurrent scrub i/os to create while verifying 2029 * a pool while importing it. 2030 */ 2031 int spa_load_verify_maxinflight = 10000; 2032 boolean_t spa_load_verify_metadata = B_TRUE; 2033 boolean_t spa_load_verify_data = B_TRUE; 2034 2035 /*ARGSUSED*/ 2036 static int 2037 spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 2038 const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 2039 { 2040 if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp)) 2041 return (0); 2042 /* 2043 * Note: normally this routine will not be called if 2044 * spa_load_verify_metadata is not set. However, it may be useful 2045 * to manually set the flag after the traversal has begun. 2046 */ 2047 if (!spa_load_verify_metadata) 2048 return (0); 2049 if (!BP_IS_METADATA(bp) && !spa_load_verify_data) 2050 return (0); 2051 2052 zio_t *rio = arg; 2053 size_t size = BP_GET_PSIZE(bp); 2054 2055 mutex_enter(&spa->spa_scrub_lock); 2056 while (spa->spa_load_verify_ios >= spa_load_verify_maxinflight) 2057 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); 2058 spa->spa_load_verify_ios++; 2059 mutex_exit(&spa->spa_scrub_lock); 2060 2061 zio_nowait(zio_read(rio, spa, bp, abd_alloc_for_io(size, B_FALSE), size, 2062 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 2063 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 2064 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 2065 return (0); 2066 } 2067 2068 /* ARGSUSED */ 2069 int 2070 verify_dataset_name_len(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg) 2071 { 2072 if (dsl_dataset_namelen(ds) >= ZFS_MAX_DATASET_NAME_LEN) 2073 return (SET_ERROR(ENAMETOOLONG)); 2074 2075 return (0); 2076 } 2077 2078 static int 2079 spa_load_verify(spa_t *spa) 2080 { 2081 zio_t *rio; 2082 spa_load_error_t sle = { 0 }; 2083 zpool_load_policy_t policy; 2084 boolean_t verify_ok = B_FALSE; 2085 int error = 0; 2086 2087 zpool_get_load_policy(spa->spa_config, &policy); 2088 2089 if (policy.zlp_rewind & ZPOOL_NEVER_REWIND) 2090 return (0); 2091 2092 dsl_pool_config_enter(spa->spa_dsl_pool, FTAG); 2093 error = dmu_objset_find_dp(spa->spa_dsl_pool, 2094 spa->spa_dsl_pool->dp_root_dir_obj, verify_dataset_name_len, NULL, 2095 DS_FIND_CHILDREN); 2096 dsl_pool_config_exit(spa->spa_dsl_pool, FTAG); 2097 if (error != 0) 2098 return (error); 2099 2100 rio = zio_root(spa, NULL, &sle, 2101 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 2102 2103 if (spa_load_verify_metadata) { 2104 if (spa->spa_extreme_rewind) { 2105 spa_load_note(spa, "performing a complete scan of the " 2106 "pool since extreme rewind is on. This may take " 2107 "a very long time.\n (spa_load_verify_data=%u, " 2108 "spa_load_verify_metadata=%u)", 2109 spa_load_verify_data, spa_load_verify_metadata); 2110 } 2111 error = traverse_pool(spa, spa->spa_verify_min_txg, 2112 TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | 2113 TRAVERSE_NO_DECRYPT, spa_load_verify_cb, rio); 2114 } 2115 2116 (void) zio_wait(rio); 2117 2118 spa->spa_load_meta_errors = sle.sle_meta_count; 2119 spa->spa_load_data_errors = sle.sle_data_count; 2120 2121 if (sle.sle_meta_count != 0 || sle.sle_data_count != 0) { 2122 spa_load_note(spa, "spa_load_verify found %llu metadata errors " 2123 "and %llu data errors", (u_longlong_t)sle.sle_meta_count, 2124 (u_longlong_t)sle.sle_data_count); 2125 } 2126 2127 if (spa_load_verify_dryrun || 2128 (!error && sle.sle_meta_count <= policy.zlp_maxmeta && 2129 sle.sle_data_count <= policy.zlp_maxdata)) { 2130 int64_t loss = 0; 2131 2132 verify_ok = B_TRUE; 2133 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 2134 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 2135 2136 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 2137 VERIFY(nvlist_add_uint64(spa->spa_load_info, 2138 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 2139 VERIFY(nvlist_add_int64(spa->spa_load_info, 2140 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 2141 VERIFY(nvlist_add_uint64(spa->spa_load_info, 2142 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 2143 } else { 2144 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 2145 } 2146 2147 if (spa_load_verify_dryrun) 2148 return (0); 2149 2150 if (error) { 2151 if (error != ENXIO && error != EIO) 2152 error = SET_ERROR(EIO); 2153 return (error); 2154 } 2155 2156 return (verify_ok ? 0 : EIO); 2157 } 2158 2159 /* 2160 * Find a value in the pool props object. 2161 */ 2162 static void 2163 spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 2164 { 2165 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 2166 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 2167 } 2168 2169 /* 2170 * Find a value in the pool directory object. 2171 */ 2172 static int 2173 spa_dir_prop(spa_t *spa, const char *name, uint64_t *val, boolean_t log_enoent) 2174 { 2175 int error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 2176 name, sizeof (uint64_t), 1, val); 2177 2178 if (error != 0 && (error != ENOENT || log_enoent)) { 2179 spa_load_failed(spa, "couldn't get '%s' value in MOS directory " 2180 "[error=%d]", name, error); 2181 } 2182 2183 return (error); 2184 } 2185 2186 static int 2187 spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 2188 { 2189 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 2190 return (SET_ERROR(err)); 2191 } 2192 2193 static void 2194 spa_spawn_aux_threads(spa_t *spa) 2195 { 2196 ASSERT(spa_writeable(spa)); 2197 2198 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2199 2200 spa_start_indirect_condensing_thread(spa); 2201 2202 ASSERT3P(spa->spa_checkpoint_discard_zthr, ==, NULL); 2203 spa->spa_checkpoint_discard_zthr = 2204 zthr_create(spa_checkpoint_discard_thread_check, 2205 spa_checkpoint_discard_thread, spa); 2206 } 2207 2208 /* 2209 * Fix up config after a partly-completed split. This is done with the 2210 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 2211 * pool have that entry in their config, but only the splitting one contains 2212 * a list of all the guids of the vdevs that are being split off. 2213 * 2214 * This function determines what to do with that list: either rejoin 2215 * all the disks to the pool, or complete the splitting process. To attempt 2216 * the rejoin, each disk that is offlined is marked online again, and 2217 * we do a reopen() call. If the vdev label for every disk that was 2218 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 2219 * then we call vdev_split() on each disk, and complete the split. 2220 * 2221 * Otherwise we leave the config alone, with all the vdevs in place in 2222 * the original pool. 2223 */ 2224 static void 2225 spa_try_repair(spa_t *spa, nvlist_t *config) 2226 { 2227 uint_t extracted; 2228 uint64_t *glist; 2229 uint_t i, gcount; 2230 nvlist_t *nvl; 2231 vdev_t **vd; 2232 boolean_t attempt_reopen; 2233 2234 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 2235 return; 2236 2237 /* check that the config is complete */ 2238 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 2239 &glist, &gcount) != 0) 2240 return; 2241 2242 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 2243 2244 /* attempt to online all the vdevs & validate */ 2245 attempt_reopen = B_TRUE; 2246 for (i = 0; i < gcount; i++) { 2247 if (glist[i] == 0) /* vdev is hole */ 2248 continue; 2249 2250 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 2251 if (vd[i] == NULL) { 2252 /* 2253 * Don't bother attempting to reopen the disks; 2254 * just do the split. 2255 */ 2256 attempt_reopen = B_FALSE; 2257 } else { 2258 /* attempt to re-online it */ 2259 vd[i]->vdev_offline = B_FALSE; 2260 } 2261 } 2262 2263 if (attempt_reopen) { 2264 vdev_reopen(spa->spa_root_vdev); 2265 2266 /* check each device to see what state it's in */ 2267 for (extracted = 0, i = 0; i < gcount; i++) { 2268 if (vd[i] != NULL && 2269 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 2270 break; 2271 ++extracted; 2272 } 2273 } 2274 2275 /* 2276 * If every disk has been moved to the new pool, or if we never 2277 * even attempted to look at them, then we split them off for 2278 * good. 2279 */ 2280 if (!attempt_reopen || gcount == extracted) { 2281 for (i = 0; i < gcount; i++) 2282 if (vd[i] != NULL) 2283 vdev_split(vd[i]); 2284 vdev_reopen(spa->spa_root_vdev); 2285 } 2286 2287 kmem_free(vd, gcount * sizeof (vdev_t *)); 2288 } 2289 2290 static int 2291 spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type) 2292 { 2293 char *ereport = FM_EREPORT_ZFS_POOL; 2294 int error; 2295 2296 spa->spa_load_state = state; 2297 2298 gethrestime(&spa->spa_loaded_ts); 2299 error = spa_load_impl(spa, type, &ereport); 2300 2301 /* 2302 * Don't count references from objsets that are already closed 2303 * and are making their way through the eviction process. 2304 */ 2305 spa_evicting_os_wait(spa); 2306 spa->spa_minref = zfs_refcount_count(&spa->spa_refcount); 2307 if (error) { 2308 if (error != EEXIST) { 2309 spa->spa_loaded_ts.tv_sec = 0; 2310 spa->spa_loaded_ts.tv_nsec = 0; 2311 } 2312 if (error != EBADF) { 2313 zfs_ereport_post(ereport, spa, NULL, NULL, NULL, 0, 0); 2314 } 2315 } 2316 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 2317 spa->spa_ena = 0; 2318 2319 return (error); 2320 } 2321 2322 /* 2323 * Count the number of per-vdev ZAPs associated with all of the vdevs in the 2324 * vdev tree rooted in the given vd, and ensure that each ZAP is present in the 2325 * spa's per-vdev ZAP list. 2326 */ 2327 static uint64_t 2328 vdev_count_verify_zaps(vdev_t *vd) 2329 { 2330 spa_t *spa = vd->vdev_spa; 2331 uint64_t total = 0; 2332 if (vd->vdev_top_zap != 0) { 2333 total++; 2334 ASSERT0(zap_lookup_int(spa->spa_meta_objset, 2335 spa->spa_all_vdev_zaps, vd->vdev_top_zap)); 2336 } 2337 if (vd->vdev_leaf_zap != 0) { 2338 total++; 2339 ASSERT0(zap_lookup_int(spa->spa_meta_objset, 2340 spa->spa_all_vdev_zaps, vd->vdev_leaf_zap)); 2341 } 2342 2343 for (uint64_t i = 0; i < vd->vdev_children; i++) { 2344 total += vdev_count_verify_zaps(vd->vdev_child[i]); 2345 } 2346 2347 return (total); 2348 } 2349 2350 /* 2351 * Determine whether the activity check is required. 2352 */ 2353 static boolean_t 2354 spa_activity_check_required(spa_t *spa, uberblock_t *ub, nvlist_t *label, 2355 nvlist_t *config) 2356 { 2357 uint64_t state = 0; 2358 uint64_t hostid = 0; 2359 uint64_t tryconfig_txg = 0; 2360 uint64_t tryconfig_timestamp = 0; 2361 nvlist_t *nvinfo; 2362 2363 if (nvlist_exists(config, ZPOOL_CONFIG_LOAD_INFO)) { 2364 nvinfo = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO); 2365 (void) nvlist_lookup_uint64(nvinfo, ZPOOL_CONFIG_MMP_TXG, 2366 &tryconfig_txg); 2367 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 2368 &tryconfig_timestamp); 2369 } 2370 2371 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, &state); 2372 2373 /* 2374 * Disable the MMP activity check - This is used by zdb which 2375 * is intended to be used on potentially active pools. 2376 */ 2377 if (spa->spa_import_flags & ZFS_IMPORT_SKIP_MMP) 2378 return (B_FALSE); 2379 2380 /* 2381 * Skip the activity check when the MMP feature is disabled. 2382 */ 2383 if (ub->ub_mmp_magic == MMP_MAGIC && ub->ub_mmp_delay == 0) 2384 return (B_FALSE); 2385 /* 2386 * If the tryconfig_* values are nonzero, they are the results of an 2387 * earlier tryimport. If they match the uberblock we just found, then 2388 * the pool has not changed and we return false so we do not test a 2389 * second time. 2390 */ 2391 if (tryconfig_txg && tryconfig_txg == ub->ub_txg && 2392 tryconfig_timestamp && tryconfig_timestamp == ub->ub_timestamp) 2393 return (B_FALSE); 2394 2395 /* 2396 * Allow the activity check to be skipped when importing the pool 2397 * on the same host which last imported it. Since the hostid from 2398 * configuration may be stale use the one read from the label. 2399 */ 2400 if (nvlist_exists(label, ZPOOL_CONFIG_HOSTID)) 2401 hostid = fnvlist_lookup_uint64(label, ZPOOL_CONFIG_HOSTID); 2402 2403 if (hostid == spa_get_hostid()) 2404 return (B_FALSE); 2405 2406 /* 2407 * Skip the activity test when the pool was cleanly exported. 2408 */ 2409 if (state != POOL_STATE_ACTIVE) 2410 return (B_FALSE); 2411 2412 return (B_TRUE); 2413 } 2414 2415 /* 2416 * Perform the import activity check. If the user canceled the import or 2417 * we detected activity then fail. 2418 */ 2419 static int 2420 spa_activity_check(spa_t *spa, uberblock_t *ub, nvlist_t *config) 2421 { 2422 uint64_t import_intervals = MAX(zfs_multihost_import_intervals, 1); 2423 uint64_t txg = ub->ub_txg; 2424 uint64_t timestamp = ub->ub_timestamp; 2425 uint64_t import_delay = NANOSEC; 2426 hrtime_t import_expire; 2427 nvlist_t *mmp_label = NULL; 2428 vdev_t *rvd = spa->spa_root_vdev; 2429 kcondvar_t cv; 2430 kmutex_t mtx; 2431 int error = 0; 2432 2433 cv_init(&cv, NULL, CV_DEFAULT, NULL); 2434 mutex_init(&mtx, NULL, MUTEX_DEFAULT, NULL); 2435 mutex_enter(&mtx); 2436 2437 /* 2438 * If ZPOOL_CONFIG_MMP_TXG is present an activity check was performed 2439 * during the earlier tryimport. If the txg recorded there is 0 then 2440 * the pool is known to be active on another host. 2441 * 2442 * Otherwise, the pool might be in use on another node. Check for 2443 * changes in the uberblocks on disk if necessary. 2444 */ 2445 if (nvlist_exists(config, ZPOOL_CONFIG_LOAD_INFO)) { 2446 nvlist_t *nvinfo = fnvlist_lookup_nvlist(config, 2447 ZPOOL_CONFIG_LOAD_INFO); 2448 2449 if (nvlist_exists(nvinfo, ZPOOL_CONFIG_MMP_TXG) && 2450 fnvlist_lookup_uint64(nvinfo, ZPOOL_CONFIG_MMP_TXG) == 0) { 2451 vdev_uberblock_load(rvd, ub, &mmp_label); 2452 error = SET_ERROR(EREMOTEIO); 2453 goto out; 2454 } 2455 } 2456 2457 /* 2458 * Preferentially use the zfs_multihost_interval from the node which 2459 * last imported the pool. This value is stored in an MMP uberblock as. 2460 * 2461 * ub_mmp_delay * vdev_count_leaves() == zfs_multihost_interval 2462 */ 2463 if (ub->ub_mmp_magic == MMP_MAGIC && ub->ub_mmp_delay) 2464 import_delay = MAX(import_delay, import_intervals * 2465 ub->ub_mmp_delay * MAX(vdev_count_leaves(spa), 1)); 2466 2467 /* Apply a floor using the local default values. */ 2468 import_delay = MAX(import_delay, import_intervals * 2469 MSEC2NSEC(MAX(zfs_multihost_interval, MMP_MIN_INTERVAL))); 2470 2471 zfs_dbgmsg("import_delay=%llu ub_mmp_delay=%llu import_intervals=%u " 2472 "leaves=%u", import_delay, ub->ub_mmp_delay, import_intervals, 2473 vdev_count_leaves(spa)); 2474 2475 /* Add a small random factor in case of simultaneous imports (0-25%) */ 2476 import_expire = gethrtime() + import_delay + 2477 (import_delay * spa_get_random(250) / 1000); 2478 2479 while (gethrtime() < import_expire) { 2480 vdev_uberblock_load(rvd, ub, &mmp_label); 2481 2482 if (txg != ub->ub_txg || timestamp != ub->ub_timestamp) { 2483 error = SET_ERROR(EREMOTEIO); 2484 break; 2485 } 2486 2487 if (mmp_label) { 2488 nvlist_free(mmp_label); 2489 mmp_label = NULL; 2490 } 2491 2492 error = cv_timedwait_sig(&cv, &mtx, ddi_get_lbolt() + hz); 2493 if (error != -1) { 2494 error = SET_ERROR(EINTR); 2495 break; 2496 } 2497 error = 0; 2498 } 2499 2500 out: 2501 mutex_exit(&mtx); 2502 mutex_destroy(&mtx); 2503 cv_destroy(&cv); 2504 2505 /* 2506 * If the pool is determined to be active store the status in the 2507 * spa->spa_load_info nvlist. If the remote hostname or hostid are 2508 * available from configuration read from disk store them as well. 2509 * This allows 'zpool import' to generate a more useful message. 2510 * 2511 * ZPOOL_CONFIG_MMP_STATE - observed pool status (mandatory) 2512 * ZPOOL_CONFIG_MMP_HOSTNAME - hostname from the active pool 2513 * ZPOOL_CONFIG_MMP_HOSTID - hostid from the active pool 2514 */ 2515 if (error == EREMOTEIO) { 2516 char *hostname = "<unknown>"; 2517 uint64_t hostid = 0; 2518 2519 if (mmp_label) { 2520 if (nvlist_exists(mmp_label, ZPOOL_CONFIG_HOSTNAME)) { 2521 hostname = fnvlist_lookup_string(mmp_label, 2522 ZPOOL_CONFIG_HOSTNAME); 2523 fnvlist_add_string(spa->spa_load_info, 2524 ZPOOL_CONFIG_MMP_HOSTNAME, hostname); 2525 } 2526 2527 if (nvlist_exists(mmp_label, ZPOOL_CONFIG_HOSTID)) { 2528 hostid = fnvlist_lookup_uint64(mmp_label, 2529 ZPOOL_CONFIG_HOSTID); 2530 fnvlist_add_uint64(spa->spa_load_info, 2531 ZPOOL_CONFIG_MMP_HOSTID, hostid); 2532 } 2533 } 2534 2535 fnvlist_add_uint64(spa->spa_load_info, 2536 ZPOOL_CONFIG_MMP_STATE, MMP_STATE_ACTIVE); 2537 fnvlist_add_uint64(spa->spa_load_info, 2538 ZPOOL_CONFIG_MMP_TXG, 0); 2539 2540 error = spa_vdev_err(rvd, VDEV_AUX_ACTIVE, EREMOTEIO); 2541 } 2542 2543 if (mmp_label) 2544 nvlist_free(mmp_label); 2545 2546 return (error); 2547 } 2548 2549 static int 2550 spa_verify_host(spa_t *spa, nvlist_t *mos_config) 2551 { 2552 uint64_t hostid; 2553 char *hostname; 2554 uint64_t myhostid = 0; 2555 2556 if (!spa_is_root(spa) && nvlist_lookup_uint64(mos_config, 2557 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2558 hostname = fnvlist_lookup_string(mos_config, 2559 ZPOOL_CONFIG_HOSTNAME); 2560 2561 myhostid = zone_get_hostid(NULL); 2562 2563 if (hostid != 0 && myhostid != 0 && hostid != myhostid) { 2564 cmn_err(CE_WARN, "pool '%s' could not be " 2565 "loaded as it was last accessed by " 2566 "another system (host: %s hostid: 0x%llx). " 2567 "See: http://illumos.org/msg/ZFS-8000-EY", 2568 spa_name(spa), hostname, (u_longlong_t)hostid); 2569 spa_load_failed(spa, "hostid verification failed: pool " 2570 "last accessed by host: %s (hostid: 0x%llx)", 2571 hostname, (u_longlong_t)hostid); 2572 return (SET_ERROR(EBADF)); 2573 } 2574 } 2575 2576 return (0); 2577 } 2578 2579 static int 2580 spa_ld_parse_config(spa_t *spa, spa_import_type_t type) 2581 { 2582 int error = 0; 2583 nvlist_t *nvtree, *nvl, *config = spa->spa_config; 2584 int parse; 2585 vdev_t *rvd; 2586 uint64_t pool_guid; 2587 char *comment; 2588 2589 /* 2590 * Versioning wasn't explicitly added to the label until later, so if 2591 * it's not present treat it as the initial version. 2592 */ 2593 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 2594 &spa->spa_ubsync.ub_version) != 0) 2595 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 2596 2597 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) { 2598 spa_load_failed(spa, "invalid config provided: '%s' missing", 2599 ZPOOL_CONFIG_POOL_GUID); 2600 return (SET_ERROR(EINVAL)); 2601 } 2602 2603 /* 2604 * If we are doing an import, ensure that the pool is not already 2605 * imported by checking if its pool guid already exists in the 2606 * spa namespace. 2607 * 2608 * The only case that we allow an already imported pool to be 2609 * imported again, is when the pool is checkpointed and we want to 2610 * look at its checkpointed state from userland tools like zdb. 2611 */ 2612 #ifdef _KERNEL 2613 if ((spa->spa_load_state == SPA_LOAD_IMPORT || 2614 spa->spa_load_state == SPA_LOAD_TRYIMPORT) && 2615 spa_guid_exists(pool_guid, 0)) { 2616 #else 2617 if ((spa->spa_load_state == SPA_LOAD_IMPORT || 2618 spa->spa_load_state == SPA_LOAD_TRYIMPORT) && 2619 spa_guid_exists(pool_guid, 0) && 2620 !spa_importing_readonly_checkpoint(spa)) { 2621 #endif 2622 spa_load_failed(spa, "a pool with guid %llu is already open", 2623 (u_longlong_t)pool_guid); 2624 return (SET_ERROR(EEXIST)); 2625 } 2626 2627 spa->spa_config_guid = pool_guid; 2628 2629 nvlist_free(spa->spa_load_info); 2630 spa->spa_load_info = fnvlist_alloc(); 2631 2632 ASSERT(spa->spa_comment == NULL); 2633 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 2634 spa->spa_comment = spa_strdup(comment); 2635 2636 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 2637 &spa->spa_config_txg); 2638 2639 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) == 0) 2640 spa->spa_config_splitting = fnvlist_dup(nvl); 2641 2642 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvtree)) { 2643 spa_load_failed(spa, "invalid config provided: '%s' missing", 2644 ZPOOL_CONFIG_VDEV_TREE); 2645 return (SET_ERROR(EINVAL)); 2646 } 2647 2648 /* 2649 * Create "The Godfather" zio to hold all async IOs 2650 */ 2651 spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *), 2652 KM_SLEEP); 2653 for (int i = 0; i < max_ncpus; i++) { 2654 spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL, 2655 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | 2656 ZIO_FLAG_GODFATHER); 2657 } 2658 2659 /* 2660 * Parse the configuration into a vdev tree. We explicitly set the 2661 * value that will be returned by spa_version() since parsing the 2662 * configuration requires knowing the version number. 2663 */ 2664 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2665 parse = (type == SPA_IMPORT_EXISTING ? 2666 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 2667 error = spa_config_parse(spa, &rvd, nvtree, NULL, 0, parse); 2668 spa_config_exit(spa, SCL_ALL, FTAG); 2669 2670 if (error != 0) { 2671 spa_load_failed(spa, "unable to parse config [error=%d]", 2672 error); 2673 return (error); 2674 } 2675 2676 ASSERT(spa->spa_root_vdev == rvd); 2677 ASSERT3U(spa->spa_min_ashift, >=, SPA_MINBLOCKSHIFT); 2678 ASSERT3U(spa->spa_max_ashift, <=, SPA_MAXBLOCKSHIFT); 2679 2680 if (type != SPA_IMPORT_ASSEMBLE) { 2681 ASSERT(spa_guid(spa) == pool_guid); 2682 } 2683 2684 return (0); 2685 } 2686 2687 /* 2688 * Recursively open all vdevs in the vdev tree. This function is called twice: 2689 * first with the untrusted config, then with the trusted config. 2690 */ 2691 static int 2692 spa_ld_open_vdevs(spa_t *spa) 2693 { 2694 int error = 0; 2695 2696 /* 2697 * spa_missing_tvds_allowed defines how many top-level vdevs can be 2698 * missing/unopenable for the root vdev to be still considered openable. 2699 */ 2700 if (spa->spa_trust_config) { 2701 spa->spa_missing_tvds_allowed = zfs_max_missing_tvds; 2702 } else if (spa->spa_config_source == SPA_CONFIG_SRC_CACHEFILE) { 2703 spa->spa_missing_tvds_allowed = zfs_max_missing_tvds_cachefile; 2704 } else if (spa->spa_config_source == SPA_CONFIG_SRC_SCAN) { 2705 spa->spa_missing_tvds_allowed = zfs_max_missing_tvds_scan; 2706 } else { 2707 spa->spa_missing_tvds_allowed = 0; 2708 } 2709 2710 spa->spa_missing_tvds_allowed = 2711 MAX(zfs_max_missing_tvds, spa->spa_missing_tvds_allowed); 2712 2713 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2714 error = vdev_open(spa->spa_root_vdev); 2715 spa_config_exit(spa, SCL_ALL, FTAG); 2716 2717 if (spa->spa_missing_tvds != 0) { 2718 spa_load_note(spa, "vdev tree has %lld missing top-level " 2719 "vdevs.", (u_longlong_t)spa->spa_missing_tvds); 2720 if (spa->spa_trust_config && (spa->spa_mode & FWRITE)) { 2721 /* 2722 * Although theoretically we could allow users to open 2723 * incomplete pools in RW mode, we'd need to add a lot 2724 * of extra logic (e.g. adjust pool space to account 2725 * for missing vdevs). 2726 * This limitation also prevents users from accidentally 2727 * opening the pool in RW mode during data recovery and 2728 * damaging it further. 2729 */ 2730 spa_load_note(spa, "pools with missing top-level " 2731 "vdevs can only be opened in read-only mode."); 2732 error = SET_ERROR(ENXIO); 2733 } else { 2734 spa_load_note(spa, "current settings allow for maximum " 2735 "%lld missing top-level vdevs at this stage.", 2736 (u_longlong_t)spa->spa_missing_tvds_allowed); 2737 } 2738 } 2739 if (error != 0) { 2740 spa_load_failed(spa, "unable to open vdev tree [error=%d]", 2741 error); 2742 } 2743 if (spa->spa_missing_tvds != 0 || error != 0) 2744 vdev_dbgmsg_print_tree(spa->spa_root_vdev, 2); 2745 2746 return (error); 2747 } 2748 2749 /* 2750 * We need to validate the vdev labels against the configuration that 2751 * we have in hand. This function is called twice: first with an untrusted 2752 * config, then with a trusted config. The validation is more strict when the 2753 * config is trusted. 2754 */ 2755 static int 2756 spa_ld_validate_vdevs(spa_t *spa) 2757 { 2758 int error = 0; 2759 vdev_t *rvd = spa->spa_root_vdev; 2760 2761 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2762 error = vdev_validate(rvd); 2763 spa_config_exit(spa, SCL_ALL, FTAG); 2764 2765 if (error != 0) { 2766 spa_load_failed(spa, "vdev_validate failed [error=%d]", error); 2767 return (error); 2768 } 2769 2770 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { 2771 spa_load_failed(spa, "cannot open vdev tree after invalidating " 2772 "some vdevs"); 2773 vdev_dbgmsg_print_tree(rvd, 2); 2774 return (SET_ERROR(ENXIO)); 2775 } 2776 2777 return (0); 2778 } 2779 2780 static void 2781 spa_ld_select_uberblock_done(spa_t *spa, uberblock_t *ub) 2782 { 2783 spa->spa_state = POOL_STATE_ACTIVE; 2784 spa->spa_ubsync = spa->spa_uberblock; 2785 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2786 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2787 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2788 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2789 spa->spa_claim_max_txg = spa->spa_first_txg; 2790 spa->spa_prev_software_version = ub->ub_software_version; 2791 } 2792 2793 static int 2794 spa_ld_select_uberblock(spa_t *spa, spa_import_type_t type) 2795 { 2796 vdev_t *rvd = spa->spa_root_vdev; 2797 nvlist_t *label; 2798 uberblock_t *ub = &spa->spa_uberblock; 2799 boolean_t activity_check = B_FALSE; 2800 2801 /* 2802 * If we are opening the checkpointed state of the pool by 2803 * rewinding to it, at this point we will have written the 2804 * checkpointed uberblock to the vdev labels, so searching 2805 * the labels will find the right uberblock. However, if 2806 * we are opening the checkpointed state read-only, we have 2807 * not modified the labels. Therefore, we must ignore the 2808 * labels and continue using the spa_uberblock that was set 2809 * by spa_ld_checkpoint_rewind. 2810 * 2811 * Note that it would be fine to ignore the labels when 2812 * rewinding (opening writeable) as well. However, if we 2813 * crash just after writing the labels, we will end up 2814 * searching the labels. Doing so in the common case means 2815 * that this code path gets exercised normally, rather than 2816 * just in the edge case. 2817 */ 2818 if (ub->ub_checkpoint_txg != 0 && 2819 spa_importing_readonly_checkpoint(spa)) { 2820 spa_ld_select_uberblock_done(spa, ub); 2821 return (0); 2822 } 2823 2824 /* 2825 * Find the best uberblock. 2826 */ 2827 vdev_uberblock_load(rvd, ub, &label); 2828 2829 /* 2830 * If we weren't able to find a single valid uberblock, return failure. 2831 */ 2832 if (ub->ub_txg == 0) { 2833 nvlist_free(label); 2834 spa_load_failed(spa, "no valid uberblock found"); 2835 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 2836 } 2837 2838 spa_load_note(spa, "using uberblock with txg=%llu", 2839 (u_longlong_t)ub->ub_txg); 2840 2841 /* 2842 * For pools which have the multihost property on determine if the 2843 * pool is truly inactive and can be safely imported. Prevent 2844 * hosts which don't have a hostid set from importing the pool. 2845 */ 2846 activity_check = spa_activity_check_required(spa, ub, label, 2847 spa->spa_config); 2848 if (activity_check) { 2849 if (ub->ub_mmp_magic == MMP_MAGIC && ub->ub_mmp_delay && 2850 spa_get_hostid() == 0) { 2851 nvlist_free(label); 2852 fnvlist_add_uint64(spa->spa_load_info, 2853 ZPOOL_CONFIG_MMP_STATE, MMP_STATE_NO_HOSTID); 2854 return (spa_vdev_err(rvd, VDEV_AUX_ACTIVE, EREMOTEIO)); 2855 } 2856 2857 int error = spa_activity_check(spa, ub, spa->spa_config); 2858 if (error) { 2859 nvlist_free(label); 2860 return (error); 2861 } 2862 2863 fnvlist_add_uint64(spa->spa_load_info, 2864 ZPOOL_CONFIG_MMP_STATE, MMP_STATE_INACTIVE); 2865 fnvlist_add_uint64(spa->spa_load_info, 2866 ZPOOL_CONFIG_MMP_TXG, ub->ub_txg); 2867 } 2868 2869 /* 2870 * If the pool has an unsupported version we can't open it. 2871 */ 2872 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 2873 nvlist_free(label); 2874 spa_load_failed(spa, "version %llu is not supported", 2875 (u_longlong_t)ub->ub_version); 2876 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 2877 } 2878 2879 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2880 nvlist_t *features; 2881 2882 /* 2883 * If we weren't able to find what's necessary for reading the 2884 * MOS in the label, return failure. 2885 */ 2886 if (label == NULL) { 2887 spa_load_failed(spa, "label config unavailable"); 2888 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2889 ENXIO)); 2890 } 2891 2892 if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_FEATURES_FOR_READ, 2893 &features) != 0) { 2894 nvlist_free(label); 2895 spa_load_failed(spa, "invalid label: '%s' missing", 2896 ZPOOL_CONFIG_FEATURES_FOR_READ); 2897 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2898 ENXIO)); 2899 } 2900 2901 /* 2902 * Update our in-core representation with the definitive values 2903 * from the label. 2904 */ 2905 nvlist_free(spa->spa_label_features); 2906 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 2907 } 2908 2909 nvlist_free(label); 2910 2911 /* 2912 * Look through entries in the label nvlist's features_for_read. If 2913 * there is a feature listed there which we don't understand then we 2914 * cannot open a pool. 2915 */ 2916 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2917 nvlist_t *unsup_feat; 2918 2919 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 2920 0); 2921 2922 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 2923 NULL); nvp != NULL; 2924 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 2925 if (!zfeature_is_supported(nvpair_name(nvp))) { 2926 VERIFY(nvlist_add_string(unsup_feat, 2927 nvpair_name(nvp), "") == 0); 2928 } 2929 } 2930 2931 if (!nvlist_empty(unsup_feat)) { 2932 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 2933 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 2934 nvlist_free(unsup_feat); 2935 spa_load_failed(spa, "some features are unsupported"); 2936 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2937 ENOTSUP)); 2938 } 2939 2940 nvlist_free(unsup_feat); 2941 } 2942 2943 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 2944 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2945 spa_try_repair(spa, spa->spa_config); 2946 spa_config_exit(spa, SCL_ALL, FTAG); 2947 nvlist_free(spa->spa_config_splitting); 2948 spa->spa_config_splitting = NULL; 2949 } 2950 2951 /* 2952 * Initialize internal SPA structures. 2953 */ 2954 spa_ld_select_uberblock_done(spa, ub); 2955 2956 return (0); 2957 } 2958 2959 static int 2960 spa_ld_open_rootbp(spa_t *spa) 2961 { 2962 int error = 0; 2963 vdev_t *rvd = spa->spa_root_vdev; 2964 2965 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 2966 if (error != 0) { 2967 spa_load_failed(spa, "unable to open rootbp in dsl_pool_init " 2968 "[error=%d]", error); 2969 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2970 } 2971 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 2972 2973 return (0); 2974 } 2975 2976 static int 2977 spa_ld_trusted_config(spa_t *spa, spa_import_type_t type, 2978 boolean_t reloading) 2979 { 2980 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 2981 nvlist_t *nv, *mos_config, *policy; 2982 int error = 0, copy_error; 2983 uint64_t healthy_tvds, healthy_tvds_mos; 2984 uint64_t mos_config_txg; 2985 2986 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object, B_TRUE) 2987 != 0) 2988 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2989 2990 /* 2991 * If we're assembling a pool from a split, the config provided is 2992 * already trusted so there is nothing to do. 2993 */ 2994 if (type == SPA_IMPORT_ASSEMBLE) 2995 return (0); 2996 2997 healthy_tvds = spa_healthy_core_tvds(spa); 2998 2999 if (load_nvlist(spa, spa->spa_config_object, &mos_config) 3000 != 0) { 3001 spa_load_failed(spa, "unable to retrieve MOS config"); 3002 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3003 } 3004 3005 /* 3006 * If we are doing an open, pool owner wasn't verified yet, thus do 3007 * the verification here. 3008 */ 3009 if (spa->spa_load_state == SPA_LOAD_OPEN) { 3010 error = spa_verify_host(spa, mos_config); 3011 if (error != 0) { 3012 nvlist_free(mos_config); 3013 return (error); 3014 } 3015 } 3016 3017 nv = fnvlist_lookup_nvlist(mos_config, ZPOOL_CONFIG_VDEV_TREE); 3018 3019 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3020 3021 /* 3022 * Build a new vdev tree from the trusted config 3023 */ 3024 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 3025 3026 /* 3027 * Vdev paths in the MOS may be obsolete. If the untrusted config was 3028 * obtained by scanning /dev/dsk, then it will have the right vdev 3029 * paths. We update the trusted MOS config with this information. 3030 * We first try to copy the paths with vdev_copy_path_strict, which 3031 * succeeds only when both configs have exactly the same vdev tree. 3032 * If that fails, we fall back to a more flexible method that has a 3033 * best effort policy. 3034 */ 3035 copy_error = vdev_copy_path_strict(rvd, mrvd); 3036 if (copy_error != 0 || spa_load_print_vdev_tree) { 3037 spa_load_note(spa, "provided vdev tree:"); 3038 vdev_dbgmsg_print_tree(rvd, 2); 3039 spa_load_note(spa, "MOS vdev tree:"); 3040 vdev_dbgmsg_print_tree(mrvd, 2); 3041 } 3042 if (copy_error != 0) { 3043 spa_load_note(spa, "vdev_copy_path_strict failed, falling " 3044 "back to vdev_copy_path_relaxed"); 3045 vdev_copy_path_relaxed(rvd, mrvd); 3046 } 3047 3048 vdev_close(rvd); 3049 vdev_free(rvd); 3050 spa->spa_root_vdev = mrvd; 3051 rvd = mrvd; 3052 spa_config_exit(spa, SCL_ALL, FTAG); 3053 3054 /* 3055 * We will use spa_config if we decide to reload the spa or if spa_load 3056 * fails and we rewind. We must thus regenerate the config using the 3057 * MOS information with the updated paths. ZPOOL_LOAD_POLICY is used to 3058 * pass settings on how to load the pool and is not stored in the MOS. 3059 * We copy it over to our new, trusted config. 3060 */ 3061 mos_config_txg = fnvlist_lookup_uint64(mos_config, 3062 ZPOOL_CONFIG_POOL_TXG); 3063 nvlist_free(mos_config); 3064 mos_config = spa_config_generate(spa, NULL, mos_config_txg, B_FALSE); 3065 if (nvlist_lookup_nvlist(spa->spa_config, ZPOOL_LOAD_POLICY, 3066 &policy) == 0) 3067 fnvlist_add_nvlist(mos_config, ZPOOL_LOAD_POLICY, policy); 3068 spa_config_set(spa, mos_config); 3069 spa->spa_config_source = SPA_CONFIG_SRC_MOS; 3070 3071 /* 3072 * Now that we got the config from the MOS, we should be more strict 3073 * in checking blkptrs and can make assumptions about the consistency 3074 * of the vdev tree. spa_trust_config must be set to true before opening 3075 * vdevs in order for them to be writeable. 3076 */ 3077 spa->spa_trust_config = B_TRUE; 3078 3079 /* 3080 * Open and validate the new vdev tree 3081 */ 3082 error = spa_ld_open_vdevs(spa); 3083 if (error != 0) 3084 return (error); 3085 3086 error = spa_ld_validate_vdevs(spa); 3087 if (error != 0) 3088 return (error); 3089 3090 if (copy_error != 0 || spa_load_print_vdev_tree) { 3091 spa_load_note(spa, "final vdev tree:"); 3092 vdev_dbgmsg_print_tree(rvd, 2); 3093 } 3094 3095 if (spa->spa_load_state != SPA_LOAD_TRYIMPORT && 3096 !spa->spa_extreme_rewind && zfs_max_missing_tvds == 0) { 3097 /* 3098 * Sanity check to make sure that we are indeed loading the 3099 * latest uberblock. If we missed SPA_SYNC_MIN_VDEVS tvds 3100 * in the config provided and they happened to be the only ones 3101 * to have the latest uberblock, we could involuntarily perform 3102 * an extreme rewind. 3103 */ 3104 healthy_tvds_mos = spa_healthy_core_tvds(spa); 3105 if (healthy_tvds_mos - healthy_tvds >= 3106 SPA_SYNC_MIN_VDEVS) { 3107 spa_load_note(spa, "config provided misses too many " 3108 "top-level vdevs compared to MOS (%lld vs %lld). ", 3109 (u_longlong_t)healthy_tvds, 3110 (u_longlong_t)healthy_tvds_mos); 3111 spa_load_note(spa, "vdev tree:"); 3112 vdev_dbgmsg_print_tree(rvd, 2); 3113 if (reloading) { 3114 spa_load_failed(spa, "config was already " 3115 "provided from MOS. Aborting."); 3116 return (spa_vdev_err(rvd, 3117 VDEV_AUX_CORRUPT_DATA, EIO)); 3118 } 3119 spa_load_note(spa, "spa must be reloaded using MOS " 3120 "config"); 3121 return (SET_ERROR(EAGAIN)); 3122 } 3123 } 3124 3125 error = spa_check_for_missing_logs(spa); 3126 if (error != 0) 3127 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 3128 3129 if (rvd->vdev_guid_sum != spa->spa_uberblock.ub_guid_sum) { 3130 spa_load_failed(spa, "uberblock guid sum doesn't match MOS " 3131 "guid sum (%llu != %llu)", 3132 (u_longlong_t)spa->spa_uberblock.ub_guid_sum, 3133 (u_longlong_t)rvd->vdev_guid_sum); 3134 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 3135 ENXIO)); 3136 } 3137 3138 return (0); 3139 } 3140 3141 static int 3142 spa_ld_open_indirect_vdev_metadata(spa_t *spa) 3143 { 3144 int error = 0; 3145 vdev_t *rvd = spa->spa_root_vdev; 3146 3147 /* 3148 * Everything that we read before spa_remove_init() must be stored 3149 * on concreted vdevs. Therefore we do this as early as possible. 3150 */ 3151 error = spa_remove_init(spa); 3152 if (error != 0) { 3153 spa_load_failed(spa, "spa_remove_init failed [error=%d]", 3154 error); 3155 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3156 } 3157 3158 /* 3159 * Retrieve information needed to condense indirect vdev mappings. 3160 */ 3161 error = spa_condense_init(spa); 3162 if (error != 0) { 3163 spa_load_failed(spa, "spa_condense_init failed [error=%d]", 3164 error); 3165 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, error)); 3166 } 3167 3168 return (0); 3169 } 3170 3171 static int 3172 spa_ld_check_features(spa_t *spa, boolean_t *missing_feat_writep) 3173 { 3174 int error = 0; 3175 vdev_t *rvd = spa->spa_root_vdev; 3176 3177 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 3178 boolean_t missing_feat_read = B_FALSE; 3179 nvlist_t *unsup_feat, *enabled_feat; 3180 3181 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 3182 &spa->spa_feat_for_read_obj, B_TRUE) != 0) { 3183 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3184 } 3185 3186 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 3187 &spa->spa_feat_for_write_obj, B_TRUE) != 0) { 3188 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3189 } 3190 3191 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 3192 &spa->spa_feat_desc_obj, B_TRUE) != 0) { 3193 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3194 } 3195 3196 enabled_feat = fnvlist_alloc(); 3197 unsup_feat = fnvlist_alloc(); 3198 3199 if (!spa_features_check(spa, B_FALSE, 3200 unsup_feat, enabled_feat)) 3201 missing_feat_read = B_TRUE; 3202 3203 if (spa_writeable(spa) || 3204 spa->spa_load_state == SPA_LOAD_TRYIMPORT) { 3205 if (!spa_features_check(spa, B_TRUE, 3206 unsup_feat, enabled_feat)) { 3207 *missing_feat_writep = B_TRUE; 3208 } 3209 } 3210 3211 fnvlist_add_nvlist(spa->spa_load_info, 3212 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 3213 3214 if (!nvlist_empty(unsup_feat)) { 3215 fnvlist_add_nvlist(spa->spa_load_info, 3216 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 3217 } 3218 3219 fnvlist_free(enabled_feat); 3220 fnvlist_free(unsup_feat); 3221 3222 if (!missing_feat_read) { 3223 fnvlist_add_boolean(spa->spa_load_info, 3224 ZPOOL_CONFIG_CAN_RDONLY); 3225 } 3226 3227 /* 3228 * If the state is SPA_LOAD_TRYIMPORT, our objective is 3229 * twofold: to determine whether the pool is available for 3230 * import in read-write mode and (if it is not) whether the 3231 * pool is available for import in read-only mode. If the pool 3232 * is available for import in read-write mode, it is displayed 3233 * as available in userland; if it is not available for import 3234 * in read-only mode, it is displayed as unavailable in 3235 * userland. If the pool is available for import in read-only 3236 * mode but not read-write mode, it is displayed as unavailable 3237 * in userland with a special note that the pool is actually 3238 * available for open in read-only mode. 3239 * 3240 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 3241 * missing a feature for write, we must first determine whether 3242 * the pool can be opened read-only before returning to 3243 * userland in order to know whether to display the 3244 * abovementioned note. 3245 */ 3246 if (missing_feat_read || (*missing_feat_writep && 3247 spa_writeable(spa))) { 3248 spa_load_failed(spa, "pool uses unsupported features"); 3249 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 3250 ENOTSUP)); 3251 } 3252 3253 /* 3254 * Load refcounts for ZFS features from disk into an in-memory 3255 * cache during SPA initialization. 3256 */ 3257 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 3258 uint64_t refcount; 3259 3260 error = feature_get_refcount_from_disk(spa, 3261 &spa_feature_table[i], &refcount); 3262 if (error == 0) { 3263 spa->spa_feat_refcount_cache[i] = refcount; 3264 } else if (error == ENOTSUP) { 3265 spa->spa_feat_refcount_cache[i] = 3266 SPA_FEATURE_DISABLED; 3267 } else { 3268 spa_load_failed(spa, "error getting refcount " 3269 "for feature %s [error=%d]", 3270 spa_feature_table[i].fi_guid, error); 3271 return (spa_vdev_err(rvd, 3272 VDEV_AUX_CORRUPT_DATA, EIO)); 3273 } 3274 } 3275 } 3276 3277 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) { 3278 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG, 3279 &spa->spa_feat_enabled_txg_obj, B_TRUE) != 0) 3280 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3281 } 3282 3283 /* 3284 * Encryption was added before bookmark_v2, even though bookmark_v2 3285 * is now a dependency. If this pool has encryption enabled without 3286 * bookmark_v2, trigger an errata message. 3287 */ 3288 if (spa_feature_is_enabled(spa, SPA_FEATURE_ENCRYPTION) && 3289 !spa_feature_is_enabled(spa, SPA_FEATURE_BOOKMARK_V2)) { 3290 spa->spa_errata = ZPOOL_ERRATA_ZOL_8308_ENCRYPTION; 3291 } 3292 3293 return (0); 3294 } 3295 3296 static int 3297 spa_ld_load_special_directories(spa_t *spa) 3298 { 3299 int error = 0; 3300 vdev_t *rvd = spa->spa_root_vdev; 3301 3302 spa->spa_is_initializing = B_TRUE; 3303 error = dsl_pool_open(spa->spa_dsl_pool); 3304 spa->spa_is_initializing = B_FALSE; 3305 if (error != 0) { 3306 spa_load_failed(spa, "dsl_pool_open failed [error=%d]", error); 3307 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3308 } 3309 3310 return (0); 3311 } 3312 3313 static int 3314 spa_ld_get_props(spa_t *spa) 3315 { 3316 int error = 0; 3317 uint64_t obj; 3318 vdev_t *rvd = spa->spa_root_vdev; 3319 3320 /* Grab the secret checksum salt from the MOS. */ 3321 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 3322 DMU_POOL_CHECKSUM_SALT, 1, 3323 sizeof (spa->spa_cksum_salt.zcs_bytes), 3324 spa->spa_cksum_salt.zcs_bytes); 3325 if (error == ENOENT) { 3326 /* Generate a new salt for subsequent use */ 3327 (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes, 3328 sizeof (spa->spa_cksum_salt.zcs_bytes)); 3329 } else if (error != 0) { 3330 spa_load_failed(spa, "unable to retrieve checksum salt from " 3331 "MOS [error=%d]", error); 3332 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3333 } 3334 3335 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj, B_TRUE) != 0) 3336 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3337 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 3338 if (error != 0) { 3339 spa_load_failed(spa, "error opening deferred-frees bpobj " 3340 "[error=%d]", error); 3341 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3342 } 3343 3344 /* 3345 * Load the bit that tells us to use the new accounting function 3346 * (raid-z deflation). If we have an older pool, this will not 3347 * be present. 3348 */ 3349 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate, B_FALSE); 3350 if (error != 0 && error != ENOENT) 3351 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3352 3353 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 3354 &spa->spa_creation_version, B_FALSE); 3355 if (error != 0 && error != ENOENT) 3356 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3357 3358 /* 3359 * Load the persistent error log. If we have an older pool, this will 3360 * not be present. 3361 */ 3362 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last, 3363 B_FALSE); 3364 if (error != 0 && error != ENOENT) 3365 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3366 3367 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 3368 &spa->spa_errlog_scrub, B_FALSE); 3369 if (error != 0 && error != ENOENT) 3370 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3371 3372 /* 3373 * Load the history object. If we have an older pool, this 3374 * will not be present. 3375 */ 3376 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history, B_FALSE); 3377 if (error != 0 && error != ENOENT) 3378 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3379 3380 /* 3381 * Load the per-vdev ZAP map. If we have an older pool, this will not 3382 * be present; in this case, defer its creation to a later time to 3383 * avoid dirtying the MOS this early / out of sync context. See 3384 * spa_sync_config_object. 3385 */ 3386 3387 /* The sentinel is only available in the MOS config. */ 3388 nvlist_t *mos_config; 3389 if (load_nvlist(spa, spa->spa_config_object, &mos_config) != 0) { 3390 spa_load_failed(spa, "unable to retrieve MOS config"); 3391 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3392 } 3393 3394 error = spa_dir_prop(spa, DMU_POOL_VDEV_ZAP_MAP, 3395 &spa->spa_all_vdev_zaps, B_FALSE); 3396 3397 if (error == ENOENT) { 3398 VERIFY(!nvlist_exists(mos_config, 3399 ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)); 3400 spa->spa_avz_action = AVZ_ACTION_INITIALIZE; 3401 ASSERT0(vdev_count_verify_zaps(spa->spa_root_vdev)); 3402 } else if (error != 0) { 3403 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3404 } else if (!nvlist_exists(mos_config, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)) { 3405 /* 3406 * An older version of ZFS overwrote the sentinel value, so 3407 * we have orphaned per-vdev ZAPs in the MOS. Defer their 3408 * destruction to later; see spa_sync_config_object. 3409 */ 3410 spa->spa_avz_action = AVZ_ACTION_DESTROY; 3411 /* 3412 * We're assuming that no vdevs have had their ZAPs created 3413 * before this. Better be sure of it. 3414 */ 3415 ASSERT0(vdev_count_verify_zaps(spa->spa_root_vdev)); 3416 } 3417 nvlist_free(mos_config); 3418 3419 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3420 3421 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object, 3422 B_FALSE); 3423 if (error && error != ENOENT) 3424 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3425 3426 if (error == 0) { 3427 uint64_t autoreplace; 3428 3429 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 3430 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 3431 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 3432 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 3433 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 3434 spa_prop_find(spa, ZPOOL_PROP_MULTIHOST, &spa->spa_multihost); 3435 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 3436 &spa->spa_dedup_ditto); 3437 spa_prop_find(spa, ZPOOL_PROP_AUTOTRIM, &spa->spa_autotrim); 3438 spa->spa_autoreplace = (autoreplace != 0); 3439 } 3440 3441 /* 3442 * If we are importing a pool with missing top-level vdevs, 3443 * we enforce that the pool doesn't panic or get suspended on 3444 * error since the likelihood of missing data is extremely high. 3445 */ 3446 if (spa->spa_missing_tvds > 0 && 3447 spa->spa_failmode != ZIO_FAILURE_MODE_CONTINUE && 3448 spa->spa_load_state != SPA_LOAD_TRYIMPORT) { 3449 spa_load_note(spa, "forcing failmode to 'continue' " 3450 "as some top level vdevs are missing"); 3451 spa->spa_failmode = ZIO_FAILURE_MODE_CONTINUE; 3452 } 3453 3454 return (0); 3455 } 3456 3457 static int 3458 spa_ld_open_aux_vdevs(spa_t *spa, spa_import_type_t type) 3459 { 3460 int error = 0; 3461 vdev_t *rvd = spa->spa_root_vdev; 3462 3463 /* 3464 * If we're assembling the pool from the split-off vdevs of 3465 * an existing pool, we don't want to attach the spares & cache 3466 * devices. 3467 */ 3468 3469 /* 3470 * Load any hot spares for this pool. 3471 */ 3472 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object, 3473 B_FALSE); 3474 if (error != 0 && error != ENOENT) 3475 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3476 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 3477 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 3478 if (load_nvlist(spa, spa->spa_spares.sav_object, 3479 &spa->spa_spares.sav_config) != 0) { 3480 spa_load_failed(spa, "error loading spares nvlist"); 3481 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3482 } 3483 3484 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3485 spa_load_spares(spa); 3486 spa_config_exit(spa, SCL_ALL, FTAG); 3487 } else if (error == 0) { 3488 spa->spa_spares.sav_sync = B_TRUE; 3489 } 3490 3491 /* 3492 * Load any level 2 ARC devices for this pool. 3493 */ 3494 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 3495 &spa->spa_l2cache.sav_object, B_FALSE); 3496 if (error != 0 && error != ENOENT) 3497 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3498 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 3499 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 3500 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 3501 &spa->spa_l2cache.sav_config) != 0) { 3502 spa_load_failed(spa, "error loading l2cache nvlist"); 3503 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3504 } 3505 3506 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3507 spa_load_l2cache(spa); 3508 spa_config_exit(spa, SCL_ALL, FTAG); 3509 } else if (error == 0) { 3510 spa->spa_l2cache.sav_sync = B_TRUE; 3511 } 3512 3513 return (0); 3514 } 3515 3516 static int 3517 spa_ld_load_vdev_metadata(spa_t *spa) 3518 { 3519 int error = 0; 3520 vdev_t *rvd = spa->spa_root_vdev; 3521 3522 /* 3523 * If the 'multihost' property is set, then never allow a pool to 3524 * be imported when the system hostid is zero. The exception to 3525 * this rule is zdb which is always allowed to access pools. 3526 */ 3527 if (spa_multihost(spa) && spa_get_hostid() == 0 && 3528 (spa->spa_import_flags & ZFS_IMPORT_SKIP_MMP) == 0) { 3529 fnvlist_add_uint64(spa->spa_load_info, 3530 ZPOOL_CONFIG_MMP_STATE, MMP_STATE_NO_HOSTID); 3531 return (spa_vdev_err(rvd, VDEV_AUX_ACTIVE, EREMOTEIO)); 3532 } 3533 3534 /* 3535 * If the 'autoreplace' property is set, then post a resource notifying 3536 * the ZFS DE that it should not issue any faults for unopenable 3537 * devices. We also iterate over the vdevs, and post a sysevent for any 3538 * unopenable vdevs so that the normal autoreplace handler can take 3539 * over. 3540 */ 3541 if (spa->spa_autoreplace && spa->spa_load_state != SPA_LOAD_TRYIMPORT) { 3542 spa_check_removed(spa->spa_root_vdev); 3543 /* 3544 * For the import case, this is done in spa_import(), because 3545 * at this point we're using the spare definitions from 3546 * the MOS config, not necessarily from the userland config. 3547 */ 3548 if (spa->spa_load_state != SPA_LOAD_IMPORT) { 3549 spa_aux_check_removed(&spa->spa_spares); 3550 spa_aux_check_removed(&spa->spa_l2cache); 3551 } 3552 } 3553 3554 /* 3555 * Load the vdev metadata such as metaslabs, DTLs, spacemap object, etc. 3556 */ 3557 error = vdev_load(rvd); 3558 if (error != 0) { 3559 spa_load_failed(spa, "vdev_load failed [error=%d]", error); 3560 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, error)); 3561 } 3562 3563 /* 3564 * Propagate the leaf DTLs we just loaded all the way up the vdev tree. 3565 */ 3566 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3567 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 3568 spa_config_exit(spa, SCL_ALL, FTAG); 3569 3570 return (0); 3571 } 3572 3573 static int 3574 spa_ld_load_dedup_tables(spa_t *spa) 3575 { 3576 int error = 0; 3577 vdev_t *rvd = spa->spa_root_vdev; 3578 3579 error = ddt_load(spa); 3580 if (error != 0) { 3581 spa_load_failed(spa, "ddt_load failed [error=%d]", error); 3582 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3583 } 3584 3585 return (0); 3586 } 3587 3588 static int 3589 spa_ld_verify_logs(spa_t *spa, spa_import_type_t type, char **ereport) 3590 { 3591 vdev_t *rvd = spa->spa_root_vdev; 3592 3593 if (type != SPA_IMPORT_ASSEMBLE && spa_writeable(spa)) { 3594 boolean_t missing = spa_check_logs(spa); 3595 if (missing) { 3596 if (spa->spa_missing_tvds != 0) { 3597 spa_load_note(spa, "spa_check_logs failed " 3598 "so dropping the logs"); 3599 } else { 3600 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 3601 spa_load_failed(spa, "spa_check_logs failed"); 3602 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, 3603 ENXIO)); 3604 } 3605 } 3606 } 3607 3608 return (0); 3609 } 3610 3611 static int 3612 spa_ld_verify_pool_data(spa_t *spa) 3613 { 3614 int error = 0; 3615 vdev_t *rvd = spa->spa_root_vdev; 3616 3617 /* 3618 * We've successfully opened the pool, verify that we're ready 3619 * to start pushing transactions. 3620 */ 3621 if (spa->spa_load_state != SPA_LOAD_TRYIMPORT) { 3622 error = spa_load_verify(spa); 3623 if (error != 0) { 3624 spa_load_failed(spa, "spa_load_verify failed " 3625 "[error=%d]", error); 3626 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 3627 error)); 3628 } 3629 } 3630 3631 return (0); 3632 } 3633 3634 static void 3635 spa_ld_claim_log_blocks(spa_t *spa) 3636 { 3637 dmu_tx_t *tx; 3638 dsl_pool_t *dp = spa_get_dsl(spa); 3639 3640 /* 3641 * Claim log blocks that haven't been committed yet. 3642 * This must all happen in a single txg. 3643 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 3644 * invoked from zil_claim_log_block()'s i/o done callback. 3645 * Price of rollback is that we abandon the log. 3646 */ 3647 spa->spa_claiming = B_TRUE; 3648 3649 tx = dmu_tx_create_assigned(dp, spa_first_txg(spa)); 3650 (void) dmu_objset_find_dp(dp, dp->dp_root_dir_obj, 3651 zil_claim, tx, DS_FIND_CHILDREN); 3652 dmu_tx_commit(tx); 3653 3654 spa->spa_claiming = B_FALSE; 3655 3656 spa_set_log_state(spa, SPA_LOG_GOOD); 3657 } 3658 3659 static void 3660 spa_ld_check_for_config_update(spa_t *spa, uint64_t config_cache_txg, 3661 boolean_t update_config_cache) 3662 { 3663 vdev_t *rvd = spa->spa_root_vdev; 3664 int need_update = B_FALSE; 3665 3666 /* 3667 * If the config cache is stale, or we have uninitialized 3668 * metaslabs (see spa_vdev_add()), then update the config. 3669 * 3670 * If this is a verbatim import, trust the current 3671 * in-core spa_config and update the disk labels. 3672 */ 3673 if (update_config_cache || config_cache_txg != spa->spa_config_txg || 3674 spa->spa_load_state == SPA_LOAD_IMPORT || 3675 spa->spa_load_state == SPA_LOAD_RECOVER || 3676 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 3677 need_update = B_TRUE; 3678 3679 for (int c = 0; c < rvd->vdev_children; c++) 3680 if (rvd->vdev_child[c]->vdev_ms_array == 0) 3681 need_update = B_TRUE; 3682 3683 /* 3684 * Update the config cache asychronously in case we're the 3685 * root pool, in which case the config cache isn't writable yet. 3686 */ 3687 if (need_update) 3688 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 3689 } 3690 3691 static void 3692 spa_ld_prepare_for_reload(spa_t *spa) 3693 { 3694 int mode = spa->spa_mode; 3695 int async_suspended = spa->spa_async_suspended; 3696 3697 spa_unload(spa); 3698 spa_deactivate(spa); 3699 spa_activate(spa, mode); 3700 3701 /* 3702 * We save the value of spa_async_suspended as it gets reset to 0 by 3703 * spa_unload(). We want to restore it back to the original value before 3704 * returning as we might be calling spa_async_resume() later. 3705 */ 3706 spa->spa_async_suspended = async_suspended; 3707 } 3708 3709 static int 3710 spa_ld_read_checkpoint_txg(spa_t *spa) 3711 { 3712 uberblock_t checkpoint; 3713 int error = 0; 3714 3715 ASSERT0(spa->spa_checkpoint_txg); 3716 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 3717 3718 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 3719 DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t), 3720 sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint); 3721 3722 if (error == ENOENT) 3723 return (0); 3724 3725 if (error != 0) 3726 return (error); 3727 3728 ASSERT3U(checkpoint.ub_txg, !=, 0); 3729 ASSERT3U(checkpoint.ub_checkpoint_txg, !=, 0); 3730 ASSERT3U(checkpoint.ub_timestamp, !=, 0); 3731 spa->spa_checkpoint_txg = checkpoint.ub_txg; 3732 spa->spa_checkpoint_info.sci_timestamp = checkpoint.ub_timestamp; 3733 3734 return (0); 3735 } 3736 3737 static int 3738 spa_ld_mos_init(spa_t *spa, spa_import_type_t type) 3739 { 3740 int error = 0; 3741 3742 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 3743 ASSERT(spa->spa_config_source != SPA_CONFIG_SRC_NONE); 3744 3745 /* 3746 * Never trust the config that is provided unless we are assembling 3747 * a pool following a split. 3748 * This means don't trust blkptrs and the vdev tree in general. This 3749 * also effectively puts the spa in read-only mode since 3750 * spa_writeable() checks for spa_trust_config to be true. 3751 * We will later load a trusted config from the MOS. 3752 */ 3753 if (type != SPA_IMPORT_ASSEMBLE) 3754 spa->spa_trust_config = B_FALSE; 3755 3756 /* 3757 * Parse the config provided to create a vdev tree. 3758 */ 3759 error = spa_ld_parse_config(spa, type); 3760 if (error != 0) 3761 return (error); 3762 3763 /* 3764 * Now that we have the vdev tree, try to open each vdev. This involves 3765 * opening the underlying physical device, retrieving its geometry and 3766 * probing the vdev with a dummy I/O. The state of each vdev will be set 3767 * based on the success of those operations. After this we'll be ready 3768 * to read from the vdevs. 3769 */ 3770 error = spa_ld_open_vdevs(spa); 3771 if (error != 0) 3772 return (error); 3773 3774 /* 3775 * Read the label of each vdev and make sure that the GUIDs stored 3776 * there match the GUIDs in the config provided. 3777 * If we're assembling a new pool that's been split off from an 3778 * existing pool, the labels haven't yet been updated so we skip 3779 * validation for now. 3780 */ 3781 if (type != SPA_IMPORT_ASSEMBLE) { 3782 error = spa_ld_validate_vdevs(spa); 3783 if (error != 0) 3784 return (error); 3785 } 3786 3787 /* 3788 * Read all vdev labels to find the best uberblock (i.e. latest, 3789 * unless spa_load_max_txg is set) and store it in spa_uberblock. We 3790 * get the list of features required to read blkptrs in the MOS from 3791 * the vdev label with the best uberblock and verify that our version 3792 * of zfs supports them all. 3793 */ 3794 error = spa_ld_select_uberblock(spa, type); 3795 if (error != 0) 3796 return (error); 3797 3798 /* 3799 * Pass that uberblock to the dsl_pool layer which will open the root 3800 * blkptr. This blkptr points to the latest version of the MOS and will 3801 * allow us to read its contents. 3802 */ 3803 error = spa_ld_open_rootbp(spa); 3804 if (error != 0) 3805 return (error); 3806 3807 return (0); 3808 } 3809 3810 static int 3811 spa_ld_checkpoint_rewind(spa_t *spa) 3812 { 3813 uberblock_t checkpoint; 3814 int error = 0; 3815 3816 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 3817 ASSERT(spa->spa_import_flags & ZFS_IMPORT_CHECKPOINT); 3818 3819 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 3820 DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t), 3821 sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint); 3822 3823 if (error != 0) { 3824 spa_load_failed(spa, "unable to retrieve checkpointed " 3825 "uberblock from the MOS config [error=%d]", error); 3826 3827 if (error == ENOENT) 3828 error = ZFS_ERR_NO_CHECKPOINT; 3829 3830 return (error); 3831 } 3832 3833 ASSERT3U(checkpoint.ub_txg, <, spa->spa_uberblock.ub_txg); 3834 ASSERT3U(checkpoint.ub_txg, ==, checkpoint.ub_checkpoint_txg); 3835 3836 /* 3837 * We need to update the txg and timestamp of the checkpointed 3838 * uberblock to be higher than the latest one. This ensures that 3839 * the checkpointed uberblock is selected if we were to close and 3840 * reopen the pool right after we've written it in the vdev labels. 3841 * (also see block comment in vdev_uberblock_compare) 3842 */ 3843 checkpoint.ub_txg = spa->spa_uberblock.ub_txg + 1; 3844 checkpoint.ub_timestamp = gethrestime_sec(); 3845 3846 /* 3847 * Set current uberblock to be the checkpointed uberblock. 3848 */ 3849 spa->spa_uberblock = checkpoint; 3850 3851 /* 3852 * If we are doing a normal rewind, then the pool is open for 3853 * writing and we sync the "updated" checkpointed uberblock to 3854 * disk. Once this is done, we've basically rewound the whole 3855 * pool and there is no way back. 3856 * 3857 * There are cases when we don't want to attempt and sync the 3858 * checkpointed uberblock to disk because we are opening a 3859 * pool as read-only. Specifically, verifying the checkpointed 3860 * state with zdb, and importing the checkpointed state to get 3861 * a "preview" of its content. 3862 */ 3863 if (spa_writeable(spa)) { 3864 vdev_t *rvd = spa->spa_root_vdev; 3865 3866 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3867 vdev_t *svd[SPA_SYNC_MIN_VDEVS] = { NULL }; 3868 int svdcount = 0; 3869 int children = rvd->vdev_children; 3870 int c0 = spa_get_random(children); 3871 3872 for (int c = 0; c < children; c++) { 3873 vdev_t *vd = rvd->vdev_child[(c0 + c) % children]; 3874 3875 /* Stop when revisiting the first vdev */ 3876 if (c > 0 && svd[0] == vd) 3877 break; 3878 3879 if (vd->vdev_ms_array == 0 || vd->vdev_islog || 3880 !vdev_is_concrete(vd)) 3881 continue; 3882 3883 svd[svdcount++] = vd; 3884 if (svdcount == SPA_SYNC_MIN_VDEVS) 3885 break; 3886 } 3887 error = vdev_config_sync(svd, svdcount, spa->spa_first_txg); 3888 if (error == 0) 3889 spa->spa_last_synced_guid = rvd->vdev_guid; 3890 spa_config_exit(spa, SCL_ALL, FTAG); 3891 3892 if (error != 0) { 3893 spa_load_failed(spa, "failed to write checkpointed " 3894 "uberblock to the vdev labels [error=%d]", error); 3895 return (error); 3896 } 3897 } 3898 3899 return (0); 3900 } 3901 3902 static int 3903 spa_ld_mos_with_trusted_config(spa_t *spa, spa_import_type_t type, 3904 boolean_t *update_config_cache) 3905 { 3906 int error; 3907 3908 /* 3909 * Parse the config for pool, open and validate vdevs, 3910 * select an uberblock, and use that uberblock to open 3911 * the MOS. 3912 */ 3913 error = spa_ld_mos_init(spa, type); 3914 if (error != 0) 3915 return (error); 3916 3917 /* 3918 * Retrieve the trusted config stored in the MOS and use it to create 3919 * a new, exact version of the vdev tree, then reopen all vdevs. 3920 */ 3921 error = spa_ld_trusted_config(spa, type, B_FALSE); 3922 if (error == EAGAIN) { 3923 if (update_config_cache != NULL) 3924 *update_config_cache = B_TRUE; 3925 3926 /* 3927 * Redo the loading process with the trusted config if it is 3928 * too different from the untrusted config. 3929 */ 3930 spa_ld_prepare_for_reload(spa); 3931 spa_load_note(spa, "RELOADING"); 3932 error = spa_ld_mos_init(spa, type); 3933 if (error != 0) 3934 return (error); 3935 3936 error = spa_ld_trusted_config(spa, type, B_TRUE); 3937 if (error != 0) 3938 return (error); 3939 3940 } else if (error != 0) { 3941 return (error); 3942 } 3943 3944 return (0); 3945 } 3946 3947 /* 3948 * Load an existing storage pool, using the config provided. This config 3949 * describes which vdevs are part of the pool and is later validated against 3950 * partial configs present in each vdev's label and an entire copy of the 3951 * config stored in the MOS. 3952 */ 3953 static int 3954 spa_load_impl(spa_t *spa, spa_import_type_t type, char **ereport) 3955 { 3956 int error = 0; 3957 boolean_t missing_feat_write = B_FALSE; 3958 boolean_t checkpoint_rewind = 3959 (spa->spa_import_flags & ZFS_IMPORT_CHECKPOINT); 3960 boolean_t update_config_cache = B_FALSE; 3961 3962 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 3963 ASSERT(spa->spa_config_source != SPA_CONFIG_SRC_NONE); 3964 3965 spa_load_note(spa, "LOADING"); 3966 3967 error = spa_ld_mos_with_trusted_config(spa, type, &update_config_cache); 3968 if (error != 0) 3969 return (error); 3970 3971 /* 3972 * If we are rewinding to the checkpoint then we need to repeat 3973 * everything we've done so far in this function but this time 3974 * selecting the checkpointed uberblock and using that to open 3975 * the MOS. 3976 */ 3977 if (checkpoint_rewind) { 3978 /* 3979 * If we are rewinding to the checkpoint update config cache 3980 * anyway. 3981 */ 3982 update_config_cache = B_TRUE; 3983 3984 /* 3985 * Extract the checkpointed uberblock from the current MOS 3986 * and use this as the pool's uberblock from now on. If the 3987 * pool is imported as writeable we also write the checkpoint 3988 * uberblock to the labels, making the rewind permanent. 3989 */ 3990 error = spa_ld_checkpoint_rewind(spa); 3991 if (error != 0) 3992 return (error); 3993 3994 /* 3995 * Redo the loading process process again with the 3996 * checkpointed uberblock. 3997 */ 3998 spa_ld_prepare_for_reload(spa); 3999 spa_load_note(spa, "LOADING checkpointed uberblock"); 4000 error = spa_ld_mos_with_trusted_config(spa, type, NULL); 4001 if (error != 0) 4002 return (error); 4003 } 4004 4005 /* 4006 * Retrieve the checkpoint txg if the pool has a checkpoint. 4007 */ 4008 error = spa_ld_read_checkpoint_txg(spa); 4009 if (error != 0) 4010 return (error); 4011 4012 /* 4013 * Retrieve the mapping of indirect vdevs. Those vdevs were removed 4014 * from the pool and their contents were re-mapped to other vdevs. Note 4015 * that everything that we read before this step must have been 4016 * rewritten on concrete vdevs after the last device removal was 4017 * initiated. Otherwise we could be reading from indirect vdevs before 4018 * we have loaded their mappings. 4019 */ 4020 error = spa_ld_open_indirect_vdev_metadata(spa); 4021 if (error != 0) 4022 return (error); 4023 4024 /* 4025 * Retrieve the full list of active features from the MOS and check if 4026 * they are all supported. 4027 */ 4028 error = spa_ld_check_features(spa, &missing_feat_write); 4029 if (error != 0) 4030 return (error); 4031 4032 /* 4033 * Load several special directories from the MOS needed by the dsl_pool 4034 * layer. 4035 */ 4036 error = spa_ld_load_special_directories(spa); 4037 if (error != 0) 4038 return (error); 4039 4040 /* 4041 * Retrieve pool properties from the MOS. 4042 */ 4043 error = spa_ld_get_props(spa); 4044 if (error != 0) 4045 return (error); 4046 4047 /* 4048 * Retrieve the list of auxiliary devices - cache devices and spares - 4049 * and open them. 4050 */ 4051 error = spa_ld_open_aux_vdevs(spa, type); 4052 if (error != 0) 4053 return (error); 4054 4055 /* 4056 * Load the metadata for all vdevs. Also check if unopenable devices 4057 * should be autoreplaced. 4058 */ 4059 error = spa_ld_load_vdev_metadata(spa); 4060 if (error != 0) 4061 return (error); 4062 4063 error = spa_ld_load_dedup_tables(spa); 4064 if (error != 0) 4065 return (error); 4066 4067 /* 4068 * Verify the logs now to make sure we don't have any unexpected errors 4069 * when we claim log blocks later. 4070 */ 4071 error = spa_ld_verify_logs(spa, type, ereport); 4072 if (error != 0) 4073 return (error); 4074 4075 if (missing_feat_write) { 4076 ASSERT(spa->spa_load_state == SPA_LOAD_TRYIMPORT); 4077 4078 /* 4079 * At this point, we know that we can open the pool in 4080 * read-only mode but not read-write mode. We now have enough 4081 * information and can return to userland. 4082 */ 4083 return (spa_vdev_err(spa->spa_root_vdev, VDEV_AUX_UNSUP_FEAT, 4084 ENOTSUP)); 4085 } 4086 4087 /* 4088 * Traverse the last txgs to make sure the pool was left off in a safe 4089 * state. When performing an extreme rewind, we verify the whole pool, 4090 * which can take a very long time. 4091 */ 4092 error = spa_ld_verify_pool_data(spa); 4093 if (error != 0) 4094 return (error); 4095 4096 /* 4097 * Calculate the deflated space for the pool. This must be done before 4098 * we write anything to the pool because we'd need to update the space 4099 * accounting using the deflated sizes. 4100 */ 4101 spa_update_dspace(spa); 4102 4103 /* 4104 * We have now retrieved all the information we needed to open the 4105 * pool. If we are importing the pool in read-write mode, a few 4106 * additional steps must be performed to finish the import. 4107 */ 4108 if (spa_writeable(spa) && (spa->spa_load_state == SPA_LOAD_RECOVER || 4109 spa->spa_load_max_txg == UINT64_MAX)) { 4110 uint64_t config_cache_txg = spa->spa_config_txg; 4111 4112 ASSERT(spa->spa_load_state != SPA_LOAD_TRYIMPORT); 4113 4114 /* 4115 * In case of a checkpoint rewind, log the original txg 4116 * of the checkpointed uberblock. 4117 */ 4118 if (checkpoint_rewind) { 4119 spa_history_log_internal(spa, "checkpoint rewind", 4120 NULL, "rewound state to txg=%llu", 4121 (u_longlong_t)spa->spa_uberblock.ub_checkpoint_txg); 4122 } 4123 4124 /* 4125 * Traverse the ZIL and claim all blocks. 4126 */ 4127 spa_ld_claim_log_blocks(spa); 4128 4129 /* 4130 * Kick-off the syncing thread. 4131 */ 4132 spa->spa_sync_on = B_TRUE; 4133 txg_sync_start(spa->spa_dsl_pool); 4134 mmp_thread_start(spa); 4135 4136 /* 4137 * Wait for all claims to sync. We sync up to the highest 4138 * claimed log block birth time so that claimed log blocks 4139 * don't appear to be from the future. spa_claim_max_txg 4140 * will have been set for us by ZIL traversal operations 4141 * performed above. 4142 */ 4143 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 4144 4145 /* 4146 * Check if we need to request an update of the config. On the 4147 * next sync, we would update the config stored in vdev labels 4148 * and the cachefile (by default /etc/zfs/zpool.cache). 4149 */ 4150 spa_ld_check_for_config_update(spa, config_cache_txg, 4151 update_config_cache); 4152 4153 /* 4154 * Check all DTLs to see if anything needs resilvering. 4155 */ 4156 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 4157 vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) 4158 spa_async_request(spa, SPA_ASYNC_RESILVER); 4159 4160 /* 4161 * Log the fact that we booted up (so that we can detect if 4162 * we rebooted in the middle of an operation). 4163 */ 4164 spa_history_log_version(spa, "open"); 4165 4166 spa_restart_removal(spa); 4167 spa_spawn_aux_threads(spa); 4168 4169 /* 4170 * Delete any inconsistent datasets. 4171 * 4172 * Note: 4173 * Since we may be issuing deletes for clones here, 4174 * we make sure to do so after we've spawned all the 4175 * auxiliary threads above (from which the livelist 4176 * deletion zthr is part of). 4177 */ 4178 (void) dmu_objset_find(spa_name(spa), 4179 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 4180 4181 /* 4182 * Clean up any stale temporary dataset userrefs. 4183 */ 4184 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 4185 4186 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4187 vdev_initialize_restart(spa->spa_root_vdev); 4188 vdev_trim_restart(spa->spa_root_vdev); 4189 vdev_autotrim_restart(spa); 4190 spa_config_exit(spa, SCL_CONFIG, FTAG); 4191 } 4192 4193 spa_load_note(spa, "LOADED"); 4194 4195 return (0); 4196 } 4197 4198 static int 4199 spa_load_retry(spa_t *spa, spa_load_state_t state) 4200 { 4201 int mode = spa->spa_mode; 4202 4203 spa_unload(spa); 4204 spa_deactivate(spa); 4205 4206 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg - 1; 4207 4208 spa_activate(spa, mode); 4209 spa_async_suspend(spa); 4210 4211 spa_load_note(spa, "spa_load_retry: rewind, max txg: %llu", 4212 (u_longlong_t)spa->spa_load_max_txg); 4213 4214 return (spa_load(spa, state, SPA_IMPORT_EXISTING)); 4215 } 4216 4217 /* 4218 * If spa_load() fails this function will try loading prior txg's. If 4219 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 4220 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 4221 * function will not rewind the pool and will return the same error as 4222 * spa_load(). 4223 */ 4224 static int 4225 spa_load_best(spa_t *spa, spa_load_state_t state, uint64_t max_request, 4226 int rewind_flags) 4227 { 4228 nvlist_t *loadinfo = NULL; 4229 nvlist_t *config = NULL; 4230 int load_error, rewind_error; 4231 uint64_t safe_rewind_txg; 4232 uint64_t min_txg; 4233 4234 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 4235 spa->spa_load_max_txg = spa->spa_load_txg; 4236 spa_set_log_state(spa, SPA_LOG_CLEAR); 4237 } else { 4238 spa->spa_load_max_txg = max_request; 4239 if (max_request != UINT64_MAX) 4240 spa->spa_extreme_rewind = B_TRUE; 4241 } 4242 4243 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING); 4244 if (load_error == 0) 4245 return (0); 4246 if (load_error == ZFS_ERR_NO_CHECKPOINT) { 4247 /* 4248 * When attempting checkpoint-rewind on a pool with no 4249 * checkpoint, we should not attempt to load uberblocks 4250 * from previous txgs when spa_load fails. 4251 */ 4252 ASSERT(spa->spa_import_flags & ZFS_IMPORT_CHECKPOINT); 4253 return (load_error); 4254 } 4255 4256 if (spa->spa_root_vdev != NULL) 4257 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4258 4259 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 4260 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 4261 4262 if (rewind_flags & ZPOOL_NEVER_REWIND) { 4263 nvlist_free(config); 4264 return (load_error); 4265 } 4266 4267 if (state == SPA_LOAD_RECOVER) { 4268 /* Price of rolling back is discarding txgs, including log */ 4269 spa_set_log_state(spa, SPA_LOG_CLEAR); 4270 } else { 4271 /* 4272 * If we aren't rolling back save the load info from our first 4273 * import attempt so that we can restore it after attempting 4274 * to rewind. 4275 */ 4276 loadinfo = spa->spa_load_info; 4277 spa->spa_load_info = fnvlist_alloc(); 4278 } 4279 4280 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 4281 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 4282 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 4283 TXG_INITIAL : safe_rewind_txg; 4284 4285 /* 4286 * Continue as long as we're finding errors, we're still within 4287 * the acceptable rewind range, and we're still finding uberblocks 4288 */ 4289 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 4290 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 4291 if (spa->spa_load_max_txg < safe_rewind_txg) 4292 spa->spa_extreme_rewind = B_TRUE; 4293 rewind_error = spa_load_retry(spa, state); 4294 } 4295 4296 spa->spa_extreme_rewind = B_FALSE; 4297 spa->spa_load_max_txg = UINT64_MAX; 4298 4299 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 4300 spa_config_set(spa, config); 4301 else 4302 nvlist_free(config); 4303 4304 if (state == SPA_LOAD_RECOVER) { 4305 ASSERT3P(loadinfo, ==, NULL); 4306 return (rewind_error); 4307 } else { 4308 /* Store the rewind info as part of the initial load info */ 4309 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 4310 spa->spa_load_info); 4311 4312 /* Restore the initial load info */ 4313 fnvlist_free(spa->spa_load_info); 4314 spa->spa_load_info = loadinfo; 4315 4316 return (load_error); 4317 } 4318 } 4319 4320 /* 4321 * Pool Open/Import 4322 * 4323 * The import case is identical to an open except that the configuration is sent 4324 * down from userland, instead of grabbed from the configuration cache. For the 4325 * case of an open, the pool configuration will exist in the 4326 * POOL_STATE_UNINITIALIZED state. 4327 * 4328 * The stats information (gen/count/ustats) is used to gather vdev statistics at 4329 * the same time open the pool, without having to keep around the spa_t in some 4330 * ambiguous state. 4331 */ 4332 static int 4333 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 4334 nvlist_t **config) 4335 { 4336 spa_t *spa; 4337 spa_load_state_t state = SPA_LOAD_OPEN; 4338 int error; 4339 int locked = B_FALSE; 4340 4341 *spapp = NULL; 4342 4343 /* 4344 * As disgusting as this is, we need to support recursive calls to this 4345 * function because dsl_dir_open() is called during spa_load(), and ends 4346 * up calling spa_open() again. The real fix is to figure out how to 4347 * avoid dsl_dir_open() calling this in the first place. 4348 */ 4349 if (mutex_owner(&spa_namespace_lock) != curthread) { 4350 mutex_enter(&spa_namespace_lock); 4351 locked = B_TRUE; 4352 } 4353 4354 if ((spa = spa_lookup(pool)) == NULL) { 4355 if (locked) 4356 mutex_exit(&spa_namespace_lock); 4357 return (SET_ERROR(ENOENT)); 4358 } 4359 4360 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 4361 zpool_load_policy_t policy; 4362 4363 zpool_get_load_policy(nvpolicy ? nvpolicy : spa->spa_config, 4364 &policy); 4365 if (policy.zlp_rewind & ZPOOL_DO_REWIND) 4366 state = SPA_LOAD_RECOVER; 4367 4368 spa_activate(spa, spa_mode_global); 4369 4370 if (state != SPA_LOAD_RECOVER) 4371 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 4372 spa->spa_config_source = SPA_CONFIG_SRC_CACHEFILE; 4373 4374 zfs_dbgmsg("spa_open_common: opening %s", pool); 4375 error = spa_load_best(spa, state, policy.zlp_txg, 4376 policy.zlp_rewind); 4377 4378 if (error == EBADF) { 4379 /* 4380 * If vdev_validate() returns failure (indicated by 4381 * EBADF), it indicates that one of the vdevs indicates 4382 * that the pool has been exported or destroyed. If 4383 * this is the case, the config cache is out of sync and 4384 * we should remove the pool from the namespace. 4385 */ 4386 spa_unload(spa); 4387 spa_deactivate(spa); 4388 spa_write_cachefile(spa, B_TRUE, B_TRUE); 4389 spa_remove(spa); 4390 if (locked) 4391 mutex_exit(&spa_namespace_lock); 4392 return (SET_ERROR(ENOENT)); 4393 } 4394 4395 if (error) { 4396 /* 4397 * We can't open the pool, but we still have useful 4398 * information: the state of each vdev after the 4399 * attempted vdev_open(). Return this to the user. 4400 */ 4401 if (config != NULL && spa->spa_config) { 4402 VERIFY(nvlist_dup(spa->spa_config, config, 4403 KM_SLEEP) == 0); 4404 VERIFY(nvlist_add_nvlist(*config, 4405 ZPOOL_CONFIG_LOAD_INFO, 4406 spa->spa_load_info) == 0); 4407 } 4408 spa_unload(spa); 4409 spa_deactivate(spa); 4410 spa->spa_last_open_failed = error; 4411 if (locked) 4412 mutex_exit(&spa_namespace_lock); 4413 *spapp = NULL; 4414 return (error); 4415 } 4416 } 4417 4418 spa_open_ref(spa, tag); 4419 4420 if (config != NULL) 4421 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4422 4423 /* 4424 * If we've recovered the pool, pass back any information we 4425 * gathered while doing the load. 4426 */ 4427 if (state == SPA_LOAD_RECOVER) { 4428 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 4429 spa->spa_load_info) == 0); 4430 } 4431 4432 if (locked) { 4433 spa->spa_last_open_failed = 0; 4434 spa->spa_last_ubsync_txg = 0; 4435 spa->spa_load_txg = 0; 4436 mutex_exit(&spa_namespace_lock); 4437 } 4438 4439 *spapp = spa; 4440 4441 return (0); 4442 } 4443 4444 int 4445 spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 4446 nvlist_t **config) 4447 { 4448 return (spa_open_common(name, spapp, tag, policy, config)); 4449 } 4450 4451 int 4452 spa_open(const char *name, spa_t **spapp, void *tag) 4453 { 4454 return (spa_open_common(name, spapp, tag, NULL, NULL)); 4455 } 4456 4457 /* 4458 * Lookup the given spa_t, incrementing the inject count in the process, 4459 * preventing it from being exported or destroyed. 4460 */ 4461 spa_t * 4462 spa_inject_addref(char *name) 4463 { 4464 spa_t *spa; 4465 4466 mutex_enter(&spa_namespace_lock); 4467 if ((spa = spa_lookup(name)) == NULL) { 4468 mutex_exit(&spa_namespace_lock); 4469 return (NULL); 4470 } 4471 spa->spa_inject_ref++; 4472 mutex_exit(&spa_namespace_lock); 4473 4474 return (spa); 4475 } 4476 4477 void 4478 spa_inject_delref(spa_t *spa) 4479 { 4480 mutex_enter(&spa_namespace_lock); 4481 spa->spa_inject_ref--; 4482 mutex_exit(&spa_namespace_lock); 4483 } 4484 4485 /* 4486 * Add spares device information to the nvlist. 4487 */ 4488 static void 4489 spa_add_spares(spa_t *spa, nvlist_t *config) 4490 { 4491 nvlist_t **spares; 4492 uint_t i, nspares; 4493 nvlist_t *nvroot; 4494 uint64_t guid; 4495 vdev_stat_t *vs; 4496 uint_t vsc; 4497 uint64_t pool; 4498 4499 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 4500 4501 if (spa->spa_spares.sav_count == 0) 4502 return; 4503 4504 VERIFY(nvlist_lookup_nvlist(config, 4505 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 4506 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 4507 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 4508 if (nspares != 0) { 4509 VERIFY(nvlist_add_nvlist_array(nvroot, 4510 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 4511 VERIFY(nvlist_lookup_nvlist_array(nvroot, 4512 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 4513 4514 /* 4515 * Go through and find any spares which have since been 4516 * repurposed as an active spare. If this is the case, update 4517 * their status appropriately. 4518 */ 4519 for (i = 0; i < nspares; i++) { 4520 VERIFY(nvlist_lookup_uint64(spares[i], 4521 ZPOOL_CONFIG_GUID, &guid) == 0); 4522 if (spa_spare_exists(guid, &pool, NULL) && 4523 pool != 0ULL) { 4524 VERIFY(nvlist_lookup_uint64_array( 4525 spares[i], ZPOOL_CONFIG_VDEV_STATS, 4526 (uint64_t **)&vs, &vsc) == 0); 4527 vs->vs_state = VDEV_STATE_CANT_OPEN; 4528 vs->vs_aux = VDEV_AUX_SPARED; 4529 } 4530 } 4531 } 4532 } 4533 4534 /* 4535 * Add l2cache device information to the nvlist, including vdev stats. 4536 */ 4537 static void 4538 spa_add_l2cache(spa_t *spa, nvlist_t *config) 4539 { 4540 nvlist_t **l2cache; 4541 uint_t i, j, nl2cache; 4542 nvlist_t *nvroot; 4543 uint64_t guid; 4544 vdev_t *vd; 4545 vdev_stat_t *vs; 4546 uint_t vsc; 4547 4548 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 4549 4550 if (spa->spa_l2cache.sav_count == 0) 4551 return; 4552 4553 VERIFY(nvlist_lookup_nvlist(config, 4554 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 4555 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 4556 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 4557 if (nl2cache != 0) { 4558 VERIFY(nvlist_add_nvlist_array(nvroot, 4559 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 4560 VERIFY(nvlist_lookup_nvlist_array(nvroot, 4561 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 4562 4563 /* 4564 * Update level 2 cache device stats. 4565 */ 4566 4567 for (i = 0; i < nl2cache; i++) { 4568 VERIFY(nvlist_lookup_uint64(l2cache[i], 4569 ZPOOL_CONFIG_GUID, &guid) == 0); 4570 4571 vd = NULL; 4572 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 4573 if (guid == 4574 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 4575 vd = spa->spa_l2cache.sav_vdevs[j]; 4576 break; 4577 } 4578 } 4579 ASSERT(vd != NULL); 4580 4581 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 4582 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 4583 == 0); 4584 vdev_get_stats(vd, vs); 4585 } 4586 } 4587 } 4588 4589 static void 4590 spa_add_feature_stats(spa_t *spa, nvlist_t *config) 4591 { 4592 nvlist_t *features; 4593 zap_cursor_t zc; 4594 zap_attribute_t za; 4595 4596 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 4597 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4598 4599 if (spa->spa_feat_for_read_obj != 0) { 4600 for (zap_cursor_init(&zc, spa->spa_meta_objset, 4601 spa->spa_feat_for_read_obj); 4602 zap_cursor_retrieve(&zc, &za) == 0; 4603 zap_cursor_advance(&zc)) { 4604 ASSERT(za.za_integer_length == sizeof (uint64_t) && 4605 za.za_num_integers == 1); 4606 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 4607 za.za_first_integer)); 4608 } 4609 zap_cursor_fini(&zc); 4610 } 4611 4612 if (spa->spa_feat_for_write_obj != 0) { 4613 for (zap_cursor_init(&zc, spa->spa_meta_objset, 4614 spa->spa_feat_for_write_obj); 4615 zap_cursor_retrieve(&zc, &za) == 0; 4616 zap_cursor_advance(&zc)) { 4617 ASSERT(za.za_integer_length == sizeof (uint64_t) && 4618 za.za_num_integers == 1); 4619 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 4620 za.za_first_integer)); 4621 } 4622 zap_cursor_fini(&zc); 4623 } 4624 4625 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 4626 features) == 0); 4627 nvlist_free(features); 4628 } 4629 4630 int 4631 spa_get_stats(const char *name, nvlist_t **config, 4632 char *altroot, size_t buflen) 4633 { 4634 int error; 4635 spa_t *spa; 4636 4637 *config = NULL; 4638 error = spa_open_common(name, &spa, FTAG, NULL, config); 4639 4640 if (spa != NULL) { 4641 /* 4642 * This still leaves a window of inconsistency where the spares 4643 * or l2cache devices could change and the config would be 4644 * self-inconsistent. 4645 */ 4646 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4647 4648 if (*config != NULL) { 4649 uint64_t loadtimes[2]; 4650 4651 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 4652 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 4653 VERIFY(nvlist_add_uint64_array(*config, 4654 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 4655 4656 VERIFY(nvlist_add_uint64(*config, 4657 ZPOOL_CONFIG_ERRCOUNT, 4658 spa_get_errlog_size(spa)) == 0); 4659 4660 if (spa_suspended(spa)) { 4661 VERIFY(nvlist_add_uint64(*config, 4662 ZPOOL_CONFIG_SUSPENDED, 4663 spa->spa_failmode) == 0); 4664 VERIFY(nvlist_add_uint64(*config, 4665 ZPOOL_CONFIG_SUSPENDED_REASON, 4666 spa->spa_suspended) == 0); 4667 } 4668 4669 spa_add_spares(spa, *config); 4670 spa_add_l2cache(spa, *config); 4671 spa_add_feature_stats(spa, *config); 4672 } 4673 } 4674 4675 /* 4676 * We want to get the alternate root even for faulted pools, so we cheat 4677 * and call spa_lookup() directly. 4678 */ 4679 if (altroot) { 4680 if (spa == NULL) { 4681 mutex_enter(&spa_namespace_lock); 4682 spa = spa_lookup(name); 4683 if (spa) 4684 spa_altroot(spa, altroot, buflen); 4685 else 4686 altroot[0] = '\0'; 4687 spa = NULL; 4688 mutex_exit(&spa_namespace_lock); 4689 } else { 4690 spa_altroot(spa, altroot, buflen); 4691 } 4692 } 4693 4694 if (spa != NULL) { 4695 spa_config_exit(spa, SCL_CONFIG, FTAG); 4696 spa_close(spa, FTAG); 4697 } 4698 4699 return (error); 4700 } 4701 4702 /* 4703 * Validate that the auxiliary device array is well formed. We must have an 4704 * array of nvlists, each which describes a valid leaf vdev. If this is an 4705 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 4706 * specified, as long as they are well-formed. 4707 */ 4708 static int 4709 spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 4710 spa_aux_vdev_t *sav, const char *config, uint64_t version, 4711 vdev_labeltype_t label) 4712 { 4713 nvlist_t **dev; 4714 uint_t i, ndev; 4715 vdev_t *vd; 4716 int error; 4717 4718 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 4719 4720 /* 4721 * It's acceptable to have no devs specified. 4722 */ 4723 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 4724 return (0); 4725 4726 if (ndev == 0) 4727 return (SET_ERROR(EINVAL)); 4728 4729 /* 4730 * Make sure the pool is formatted with a version that supports this 4731 * device type. 4732 */ 4733 if (spa_version(spa) < version) 4734 return (SET_ERROR(ENOTSUP)); 4735 4736 /* 4737 * Set the pending device list so we correctly handle device in-use 4738 * checking. 4739 */ 4740 sav->sav_pending = dev; 4741 sav->sav_npending = ndev; 4742 4743 for (i = 0; i < ndev; i++) { 4744 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 4745 mode)) != 0) 4746 goto out; 4747 4748 if (!vd->vdev_ops->vdev_op_leaf) { 4749 vdev_free(vd); 4750 error = SET_ERROR(EINVAL); 4751 goto out; 4752 } 4753 4754 vd->vdev_top = vd; 4755 4756 if ((error = vdev_open(vd)) == 0 && 4757 (error = vdev_label_init(vd, crtxg, label)) == 0) { 4758 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 4759 vd->vdev_guid) == 0); 4760 } 4761 4762 vdev_free(vd); 4763 4764 if (error && 4765 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 4766 goto out; 4767 else 4768 error = 0; 4769 } 4770 4771 out: 4772 sav->sav_pending = NULL; 4773 sav->sav_npending = 0; 4774 return (error); 4775 } 4776 4777 static int 4778 spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 4779 { 4780 int error; 4781 4782 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 4783 4784 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 4785 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 4786 VDEV_LABEL_SPARE)) != 0) { 4787 return (error); 4788 } 4789 4790 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 4791 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 4792 VDEV_LABEL_L2CACHE)); 4793 } 4794 4795 static void 4796 spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 4797 const char *config) 4798 { 4799 int i; 4800 4801 if (sav->sav_config != NULL) { 4802 nvlist_t **olddevs; 4803 uint_t oldndevs; 4804 nvlist_t **newdevs; 4805 4806 /* 4807 * Generate new dev list by concatentating with the 4808 * current dev list. 4809 */ 4810 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 4811 &olddevs, &oldndevs) == 0); 4812 4813 newdevs = kmem_alloc(sizeof (void *) * 4814 (ndevs + oldndevs), KM_SLEEP); 4815 for (i = 0; i < oldndevs; i++) 4816 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 4817 KM_SLEEP) == 0); 4818 for (i = 0; i < ndevs; i++) 4819 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 4820 KM_SLEEP) == 0); 4821 4822 VERIFY(nvlist_remove(sav->sav_config, config, 4823 DATA_TYPE_NVLIST_ARRAY) == 0); 4824 4825 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 4826 config, newdevs, ndevs + oldndevs) == 0); 4827 for (i = 0; i < oldndevs + ndevs; i++) 4828 nvlist_free(newdevs[i]); 4829 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 4830 } else { 4831 /* 4832 * Generate a new dev list. 4833 */ 4834 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 4835 KM_SLEEP) == 0); 4836 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 4837 devs, ndevs) == 0); 4838 } 4839 } 4840 4841 /* 4842 * Stop and drop level 2 ARC devices 4843 */ 4844 void 4845 spa_l2cache_drop(spa_t *spa) 4846 { 4847 vdev_t *vd; 4848 int i; 4849 spa_aux_vdev_t *sav = &spa->spa_l2cache; 4850 4851 for (i = 0; i < sav->sav_count; i++) { 4852 uint64_t pool; 4853 4854 vd = sav->sav_vdevs[i]; 4855 ASSERT(vd != NULL); 4856 4857 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 4858 pool != 0ULL && l2arc_vdev_present(vd)) 4859 l2arc_remove_vdev(vd); 4860 } 4861 } 4862 4863 /* 4864 * Verify encryption parameters for spa creation. If we are encrypting, we must 4865 * have the encryption feature flag enabled. 4866 */ 4867 static int 4868 spa_create_check_encryption_params(dsl_crypto_params_t *dcp, 4869 boolean_t has_encryption) 4870 { 4871 if (dcp->cp_crypt != ZIO_CRYPT_OFF && 4872 dcp->cp_crypt != ZIO_CRYPT_INHERIT && 4873 !has_encryption) 4874 return (SET_ERROR(ENOTSUP)); 4875 4876 return (dmu_objset_create_crypt_check(NULL, dcp, NULL)); 4877 } 4878 4879 /* 4880 * Pool Creation 4881 */ 4882 int 4883 spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 4884 nvlist_t *zplprops, dsl_crypto_params_t *dcp) 4885 { 4886 spa_t *spa; 4887 char *altroot = NULL; 4888 vdev_t *rvd; 4889 dsl_pool_t *dp; 4890 dmu_tx_t *tx; 4891 int error = 0; 4892 uint64_t txg = TXG_INITIAL; 4893 nvlist_t **spares, **l2cache; 4894 uint_t nspares, nl2cache; 4895 uint64_t version, obj; 4896 boolean_t has_features; 4897 char *poolname; 4898 nvlist_t *nvl; 4899 boolean_t has_encryption; 4900 spa_feature_t feat; 4901 char *feat_name; 4902 4903 if (props == NULL || 4904 nvlist_lookup_string(props, 4905 zpool_prop_to_name(ZPOOL_PROP_TNAME), &poolname) != 0) 4906 poolname = (char *)pool; 4907 4908 /* 4909 * If this pool already exists, return failure. 4910 */ 4911 mutex_enter(&spa_namespace_lock); 4912 if (spa_lookup(poolname) != NULL) { 4913 mutex_exit(&spa_namespace_lock); 4914 return (SET_ERROR(EEXIST)); 4915 } 4916 4917 /* 4918 * Allocate a new spa_t structure. 4919 */ 4920 nvl = fnvlist_alloc(); 4921 fnvlist_add_string(nvl, ZPOOL_CONFIG_POOL_NAME, pool); 4922 (void) nvlist_lookup_string(props, 4923 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 4924 spa = spa_add(poolname, nvl, altroot); 4925 fnvlist_free(nvl); 4926 spa_activate(spa, spa_mode_global); 4927 4928 if (props && (error = spa_prop_validate(spa, props))) { 4929 spa_deactivate(spa); 4930 spa_remove(spa); 4931 mutex_exit(&spa_namespace_lock); 4932 return (error); 4933 } 4934 4935 /* 4936 * Temporary pool names should never be written to disk. 4937 */ 4938 if (poolname != pool) 4939 spa->spa_import_flags |= ZFS_IMPORT_TEMP_NAME; 4940 4941 has_features = B_FALSE; 4942 has_encryption = B_FALSE; 4943 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 4944 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 4945 if (zpool_prop_feature(nvpair_name(elem))) { 4946 has_features = B_TRUE; 4947 feat_name = strchr(nvpair_name(elem), '@') + 1; 4948 VERIFY0(zfeature_lookup_name(feat_name, &feat)); 4949 if (feat == SPA_FEATURE_ENCRYPTION) 4950 has_encryption = B_TRUE; 4951 } 4952 } 4953 4954 /* verify encryption params, if they were provided */ 4955 if (dcp != NULL) { 4956 error = spa_create_check_encryption_params(dcp, has_encryption); 4957 if (error != 0) { 4958 spa_deactivate(spa); 4959 spa_remove(spa); 4960 mutex_exit(&spa_namespace_lock); 4961 return (error); 4962 } 4963 } 4964 4965 if (has_features || nvlist_lookup_uint64(props, 4966 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 4967 version = SPA_VERSION; 4968 } 4969 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 4970 4971 spa->spa_first_txg = txg; 4972 spa->spa_uberblock.ub_txg = txg - 1; 4973 spa->spa_uberblock.ub_version = version; 4974 spa->spa_ubsync = spa->spa_uberblock; 4975 spa->spa_load_state = SPA_LOAD_CREATE; 4976 spa->spa_removing_phys.sr_state = DSS_NONE; 4977 spa->spa_removing_phys.sr_removing_vdev = -1; 4978 spa->spa_removing_phys.sr_prev_indirect_vdev = -1; 4979 spa->spa_indirect_vdevs_loaded = B_TRUE; 4980 4981 /* 4982 * Create "The Godfather" zio to hold all async IOs 4983 */ 4984 spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *), 4985 KM_SLEEP); 4986 for (int i = 0; i < max_ncpus; i++) { 4987 spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL, 4988 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | 4989 ZIO_FLAG_GODFATHER); 4990 } 4991 4992 /* 4993 * Create the root vdev. 4994 */ 4995 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4996 4997 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 4998 4999 ASSERT(error != 0 || rvd != NULL); 5000 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 5001 5002 if (error == 0 && !zfs_allocatable_devs(nvroot)) 5003 error = SET_ERROR(EINVAL); 5004 5005 if (error == 0 && 5006 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 5007 (error = spa_validate_aux(spa, nvroot, txg, 5008 VDEV_ALLOC_ADD)) == 0) { 5009 /* 5010 * instantiate the metaslab groups (this will dirty the vdevs) 5011 * we can no longer error exit past this point 5012 */ 5013 for (int c = 0; error == 0 && c < rvd->vdev_children; c++) { 5014 vdev_t *vd = rvd->vdev_child[c]; 5015 5016 vdev_metaslab_set_size(vd); 5017 vdev_expand(vd, txg); 5018 } 5019 } 5020 5021 spa_config_exit(spa, SCL_ALL, FTAG); 5022 5023 if (error != 0) { 5024 spa_unload(spa); 5025 spa_deactivate(spa); 5026 spa_remove(spa); 5027 mutex_exit(&spa_namespace_lock); 5028 return (error); 5029 } 5030 5031 /* 5032 * Get the list of spares, if specified. 5033 */ 5034 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 5035 &spares, &nspares) == 0) { 5036 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 5037 KM_SLEEP) == 0); 5038 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 5039 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 5040 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5041 spa_load_spares(spa); 5042 spa_config_exit(spa, SCL_ALL, FTAG); 5043 spa->spa_spares.sav_sync = B_TRUE; 5044 } 5045 5046 /* 5047 * Get the list of level 2 cache devices, if specified. 5048 */ 5049 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 5050 &l2cache, &nl2cache) == 0) { 5051 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 5052 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5053 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 5054 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 5055 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5056 spa_load_l2cache(spa); 5057 spa_config_exit(spa, SCL_ALL, FTAG); 5058 spa->spa_l2cache.sav_sync = B_TRUE; 5059 } 5060 5061 spa->spa_is_initializing = B_TRUE; 5062 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, dcp, txg); 5063 spa->spa_is_initializing = B_FALSE; 5064 5065 /* 5066 * Create DDTs (dedup tables). 5067 */ 5068 ddt_create(spa); 5069 5070 spa_update_dspace(spa); 5071 5072 tx = dmu_tx_create_assigned(dp, txg); 5073 5074 /* 5075 * Create the pool config object. 5076 */ 5077 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 5078 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 5079 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 5080 5081 if (zap_add(spa->spa_meta_objset, 5082 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 5083 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 5084 cmn_err(CE_PANIC, "failed to add pool config"); 5085 } 5086 5087 if (zap_add(spa->spa_meta_objset, 5088 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 5089 sizeof (uint64_t), 1, &version, tx) != 0) { 5090 cmn_err(CE_PANIC, "failed to add pool version"); 5091 } 5092 5093 /* Newly created pools with the right version are always deflated. */ 5094 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 5095 spa->spa_deflate = TRUE; 5096 if (zap_add(spa->spa_meta_objset, 5097 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 5098 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 5099 cmn_err(CE_PANIC, "failed to add deflate"); 5100 } 5101 } 5102 5103 /* 5104 * Create the deferred-free bpobj. Turn off compression 5105 * because sync-to-convergence takes longer if the blocksize 5106 * keeps changing. 5107 */ 5108 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 5109 dmu_object_set_compress(spa->spa_meta_objset, obj, 5110 ZIO_COMPRESS_OFF, tx); 5111 if (zap_add(spa->spa_meta_objset, 5112 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 5113 sizeof (uint64_t), 1, &obj, tx) != 0) { 5114 cmn_err(CE_PANIC, "failed to add bpobj"); 5115 } 5116 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 5117 spa->spa_meta_objset, obj)); 5118 5119 /* 5120 * Create the pool's history object. 5121 */ 5122 if (version >= SPA_VERSION_ZPOOL_HISTORY) 5123 spa_history_create_obj(spa, tx); 5124 5125 /* 5126 * Generate some random noise for salted checksums to operate on. 5127 */ 5128 (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes, 5129 sizeof (spa->spa_cksum_salt.zcs_bytes)); 5130 5131 /* 5132 * Set pool properties. 5133 */ 5134 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 5135 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 5136 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 5137 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 5138 spa->spa_multihost = zpool_prop_default_numeric(ZPOOL_PROP_MULTIHOST); 5139 spa->spa_autotrim = zpool_prop_default_numeric(ZPOOL_PROP_AUTOTRIM); 5140 5141 if (props != NULL) { 5142 spa_configfile_set(spa, props, B_FALSE); 5143 spa_sync_props(props, tx); 5144 } 5145 5146 dmu_tx_commit(tx); 5147 5148 spa->spa_sync_on = B_TRUE; 5149 txg_sync_start(spa->spa_dsl_pool); 5150 mmp_thread_start(spa); 5151 5152 /* 5153 * We explicitly wait for the first transaction to complete so that our 5154 * bean counters are appropriately updated. 5155 */ 5156 txg_wait_synced(spa->spa_dsl_pool, txg); 5157 5158 spa_spawn_aux_threads(spa); 5159 5160 spa_write_cachefile(spa, B_FALSE, B_TRUE); 5161 spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_CREATE); 5162 5163 spa_history_log_version(spa, "create"); 5164 5165 /* 5166 * Don't count references from objsets that are already closed 5167 * and are making their way through the eviction process. 5168 */ 5169 spa_evicting_os_wait(spa); 5170 spa->spa_minref = zfs_refcount_count(&spa->spa_refcount); 5171 spa->spa_load_state = SPA_LOAD_NONE; 5172 5173 mutex_exit(&spa_namespace_lock); 5174 5175 return (0); 5176 } 5177 5178 #ifdef _KERNEL 5179 /* 5180 * Get the root pool information from the root disk, then import the root pool 5181 * during the system boot up time. 5182 */ 5183 extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); 5184 5185 static nvlist_t * 5186 spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) 5187 { 5188 nvlist_t *config; 5189 nvlist_t *nvtop, *nvroot; 5190 uint64_t pgid; 5191 5192 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 5193 return (NULL); 5194 5195 /* 5196 * Add this top-level vdev to the child array. 5197 */ 5198 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 5199 &nvtop) == 0); 5200 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 5201 &pgid) == 0); 5202 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 5203 5204 /* 5205 * Put this pool's top-level vdevs into a root vdev. 5206 */ 5207 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5208 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 5209 VDEV_TYPE_ROOT) == 0); 5210 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 5211 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 5212 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 5213 &nvtop, 1) == 0); 5214 5215 /* 5216 * Replace the existing vdev_tree with the new root vdev in 5217 * this pool's configuration (remove the old, add the new). 5218 */ 5219 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 5220 nvlist_free(nvroot); 5221 return (config); 5222 } 5223 5224 /* 5225 * Walk the vdev tree and see if we can find a device with "better" 5226 * configuration. A configuration is "better" if the label on that 5227 * device has a more recent txg. 5228 */ 5229 static void 5230 spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 5231 { 5232 for (int c = 0; c < vd->vdev_children; c++) 5233 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 5234 5235 if (vd->vdev_ops->vdev_op_leaf) { 5236 nvlist_t *label; 5237 uint64_t label_txg; 5238 5239 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 5240 &label) != 0) 5241 return; 5242 5243 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 5244 &label_txg) == 0); 5245 5246 /* 5247 * Do we have a better boot device? 5248 */ 5249 if (label_txg > *txg) { 5250 *txg = label_txg; 5251 *avd = vd; 5252 } 5253 nvlist_free(label); 5254 } 5255 } 5256 5257 /* 5258 * Import a root pool. 5259 * 5260 * For x86. devpath_list will consist of devid and/or physpath name of 5261 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 5262 * The GRUB "findroot" command will return the vdev we should boot. 5263 * 5264 * For Sparc, devpath_list consists the physpath name of the booting device 5265 * no matter the rootpool is a single device pool or a mirrored pool. 5266 * e.g. 5267 * "/pci@1f,0/ide@d/disk@0,0:a" 5268 */ 5269 int 5270 spa_import_rootpool(char *devpath, char *devid) 5271 { 5272 spa_t *spa; 5273 vdev_t *rvd, *bvd, *avd = NULL; 5274 nvlist_t *config, *nvtop; 5275 uint64_t guid, txg; 5276 char *pname; 5277 int error; 5278 5279 /* 5280 * Read the label from the boot device and generate a configuration. 5281 */ 5282 config = spa_generate_rootconf(devpath, devid, &guid); 5283 #if defined(_OBP) && defined(_KERNEL) 5284 if (config == NULL) { 5285 if (strstr(devpath, "/iscsi/ssd") != NULL) { 5286 /* iscsi boot */ 5287 get_iscsi_bootpath_phy(devpath); 5288 config = spa_generate_rootconf(devpath, devid, &guid); 5289 } 5290 } 5291 #endif 5292 if (config == NULL) { 5293 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 5294 devpath); 5295 return (SET_ERROR(EIO)); 5296 } 5297 5298 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 5299 &pname) == 0); 5300 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 5301 5302 mutex_enter(&spa_namespace_lock); 5303 if ((spa = spa_lookup(pname)) != NULL) { 5304 /* 5305 * Remove the existing root pool from the namespace so that we 5306 * can replace it with the correct config we just read in. 5307 */ 5308 spa_remove(spa); 5309 } 5310 5311 spa = spa_add(pname, config, NULL); 5312 spa->spa_is_root = B_TRUE; 5313 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 5314 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 5315 &spa->spa_ubsync.ub_version) != 0) 5316 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 5317 5318 /* 5319 * Build up a vdev tree based on the boot device's label config. 5320 */ 5321 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 5322 &nvtop) == 0); 5323 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5324 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 5325 VDEV_ALLOC_ROOTPOOL); 5326 spa_config_exit(spa, SCL_ALL, FTAG); 5327 if (error) { 5328 mutex_exit(&spa_namespace_lock); 5329 nvlist_free(config); 5330 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 5331 pname); 5332 return (error); 5333 } 5334 5335 /* 5336 * Get the boot vdev. 5337 */ 5338 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 5339 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 5340 (u_longlong_t)guid); 5341 error = SET_ERROR(ENOENT); 5342 goto out; 5343 } 5344 5345 /* 5346 * Determine if there is a better boot device. 5347 */ 5348 avd = bvd; 5349 spa_alt_rootvdev(rvd, &avd, &txg); 5350 if (avd != bvd) { 5351 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 5352 "try booting from '%s'", avd->vdev_path); 5353 error = SET_ERROR(EINVAL); 5354 goto out; 5355 } 5356 5357 /* 5358 * If the boot device is part of a spare vdev then ensure that 5359 * we're booting off the active spare. 5360 */ 5361 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 5362 !bvd->vdev_isspare) { 5363 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 5364 "try booting from '%s'", 5365 bvd->vdev_parent-> 5366 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 5367 error = SET_ERROR(EINVAL); 5368 goto out; 5369 } 5370 5371 error = 0; 5372 out: 5373 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5374 vdev_free(rvd); 5375 spa_config_exit(spa, SCL_ALL, FTAG); 5376 mutex_exit(&spa_namespace_lock); 5377 5378 nvlist_free(config); 5379 return (error); 5380 } 5381 5382 #endif 5383 5384 /* 5385 * Import a non-root pool into the system. 5386 */ 5387 int 5388 spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) 5389 { 5390 spa_t *spa; 5391 char *altroot = NULL; 5392 spa_load_state_t state = SPA_LOAD_IMPORT; 5393 zpool_load_policy_t policy; 5394 uint64_t mode = spa_mode_global; 5395 uint64_t readonly = B_FALSE; 5396 int error; 5397 nvlist_t *nvroot; 5398 nvlist_t **spares, **l2cache; 5399 uint_t nspares, nl2cache; 5400 5401 /* 5402 * If a pool with this name exists, return failure. 5403 */ 5404 mutex_enter(&spa_namespace_lock); 5405 if (spa_lookup(pool) != NULL) { 5406 mutex_exit(&spa_namespace_lock); 5407 return (SET_ERROR(EEXIST)); 5408 } 5409 5410 /* 5411 * Create and initialize the spa structure. 5412 */ 5413 (void) nvlist_lookup_string(props, 5414 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 5415 (void) nvlist_lookup_uint64(props, 5416 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); 5417 if (readonly) 5418 mode = FREAD; 5419 spa = spa_add(pool, config, altroot); 5420 spa->spa_import_flags = flags; 5421 5422 /* 5423 * Verbatim import - Take a pool and insert it into the namespace 5424 * as if it had been loaded at boot. 5425 */ 5426 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { 5427 if (props != NULL) 5428 spa_configfile_set(spa, props, B_FALSE); 5429 5430 spa_write_cachefile(spa, B_FALSE, B_TRUE); 5431 spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_IMPORT); 5432 zfs_dbgmsg("spa_import: verbatim import of %s", pool); 5433 mutex_exit(&spa_namespace_lock); 5434 return (0); 5435 } 5436 5437 spa_activate(spa, mode); 5438 5439 /* 5440 * Don't start async tasks until we know everything is healthy. 5441 */ 5442 spa_async_suspend(spa); 5443 5444 zpool_get_load_policy(config, &policy); 5445 if (policy.zlp_rewind & ZPOOL_DO_REWIND) 5446 state = SPA_LOAD_RECOVER; 5447 5448 spa->spa_config_source = SPA_CONFIG_SRC_TRYIMPORT; 5449 5450 if (state != SPA_LOAD_RECOVER) { 5451 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 5452 zfs_dbgmsg("spa_import: importing %s", pool); 5453 } else { 5454 zfs_dbgmsg("spa_import: importing %s, max_txg=%lld " 5455 "(RECOVERY MODE)", pool, (longlong_t)policy.zlp_txg); 5456 } 5457 error = spa_load_best(spa, state, policy.zlp_txg, policy.zlp_rewind); 5458 5459 /* 5460 * Propagate anything learned while loading the pool and pass it 5461 * back to caller (i.e. rewind info, missing devices, etc). 5462 */ 5463 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 5464 spa->spa_load_info) == 0); 5465 5466 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5467 /* 5468 * Toss any existing sparelist, as it doesn't have any validity 5469 * anymore, and conflicts with spa_has_spare(). 5470 */ 5471 if (spa->spa_spares.sav_config) { 5472 nvlist_free(spa->spa_spares.sav_config); 5473 spa->spa_spares.sav_config = NULL; 5474 spa_load_spares(spa); 5475 } 5476 if (spa->spa_l2cache.sav_config) { 5477 nvlist_free(spa->spa_l2cache.sav_config); 5478 spa->spa_l2cache.sav_config = NULL; 5479 spa_load_l2cache(spa); 5480 } 5481 5482 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 5483 &nvroot) == 0); 5484 if (error == 0) 5485 error = spa_validate_aux(spa, nvroot, -1ULL, 5486 VDEV_ALLOC_SPARE); 5487 if (error == 0) 5488 error = spa_validate_aux(spa, nvroot, -1ULL, 5489 VDEV_ALLOC_L2CACHE); 5490 spa_config_exit(spa, SCL_ALL, FTAG); 5491 5492 if (props != NULL) 5493 spa_configfile_set(spa, props, B_FALSE); 5494 5495 if (error != 0 || (props && spa_writeable(spa) && 5496 (error = spa_prop_set(spa, props)))) { 5497 spa_unload(spa); 5498 spa_deactivate(spa); 5499 spa_remove(spa); 5500 mutex_exit(&spa_namespace_lock); 5501 return (error); 5502 } 5503 5504 spa_async_resume(spa); 5505 5506 /* 5507 * Override any spares and level 2 cache devices as specified by 5508 * the user, as these may have correct device names/devids, etc. 5509 */ 5510 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 5511 &spares, &nspares) == 0) { 5512 if (spa->spa_spares.sav_config) 5513 VERIFY(nvlist_remove(spa->spa_spares.sav_config, 5514 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); 5515 else 5516 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, 5517 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5518 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 5519 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 5520 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5521 spa_load_spares(spa); 5522 spa_config_exit(spa, SCL_ALL, FTAG); 5523 spa->spa_spares.sav_sync = B_TRUE; 5524 } 5525 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 5526 &l2cache, &nl2cache) == 0) { 5527 if (spa->spa_l2cache.sav_config) 5528 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, 5529 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); 5530 else 5531 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 5532 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5533 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 5534 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 5535 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5536 spa_load_l2cache(spa); 5537 spa_config_exit(spa, SCL_ALL, FTAG); 5538 spa->spa_l2cache.sav_sync = B_TRUE; 5539 } 5540 5541 /* 5542 * Check for any removed devices. 5543 */ 5544 if (spa->spa_autoreplace) { 5545 spa_aux_check_removed(&spa->spa_spares); 5546 spa_aux_check_removed(&spa->spa_l2cache); 5547 } 5548 5549 if (spa_writeable(spa)) { 5550 /* 5551 * Update the config cache to include the newly-imported pool. 5552 */ 5553 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 5554 } 5555 5556 /* 5557 * It's possible that the pool was expanded while it was exported. 5558 * We kick off an async task to handle this for us. 5559 */ 5560 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 5561 5562 spa_history_log_version(spa, "import"); 5563 5564 spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_IMPORT); 5565 5566 mutex_exit(&spa_namespace_lock); 5567 5568 return (0); 5569 } 5570 5571 nvlist_t * 5572 spa_tryimport(nvlist_t *tryconfig) 5573 { 5574 nvlist_t *config = NULL; 5575 char *poolname, *cachefile; 5576 spa_t *spa; 5577 uint64_t state; 5578 int error; 5579 zpool_load_policy_t policy; 5580 5581 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) 5582 return (NULL); 5583 5584 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) 5585 return (NULL); 5586 5587 /* 5588 * Create and initialize the spa structure. 5589 */ 5590 mutex_enter(&spa_namespace_lock); 5591 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); 5592 spa_activate(spa, FREAD); 5593 5594 /* 5595 * Rewind pool if a max txg was provided. 5596 */ 5597 zpool_get_load_policy(spa->spa_config, &policy); 5598 if (policy.zlp_txg != UINT64_MAX) { 5599 spa->spa_load_max_txg = policy.zlp_txg; 5600 spa->spa_extreme_rewind = B_TRUE; 5601 zfs_dbgmsg("spa_tryimport: importing %s, max_txg=%lld", 5602 poolname, (longlong_t)policy.zlp_txg); 5603 } else { 5604 zfs_dbgmsg("spa_tryimport: importing %s", poolname); 5605 } 5606 5607 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_CACHEFILE, &cachefile) 5608 == 0) { 5609 zfs_dbgmsg("spa_tryimport: using cachefile '%s'", cachefile); 5610 spa->spa_config_source = SPA_CONFIG_SRC_CACHEFILE; 5611 } else { 5612 spa->spa_config_source = SPA_CONFIG_SRC_SCAN; 5613 } 5614 5615 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING); 5616 5617 /* 5618 * If 'tryconfig' was at least parsable, return the current config. 5619 */ 5620 if (spa->spa_root_vdev != NULL) { 5621 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 5622 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 5623 poolname) == 0); 5624 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 5625 state) == 0); 5626 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 5627 spa->spa_uberblock.ub_timestamp) == 0); 5628 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 5629 spa->spa_load_info) == 0); 5630 5631 /* 5632 * If the bootfs property exists on this pool then we 5633 * copy it out so that external consumers can tell which 5634 * pools are bootable. 5635 */ 5636 if ((!error || error == EEXIST) && spa->spa_bootfs) { 5637 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 5638 5639 /* 5640 * We have to play games with the name since the 5641 * pool was opened as TRYIMPORT_NAME. 5642 */ 5643 if (dsl_dsobj_to_dsname(spa_name(spa), 5644 spa->spa_bootfs, tmpname) == 0) { 5645 char *cp; 5646 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 5647 5648 cp = strchr(tmpname, '/'); 5649 if (cp == NULL) { 5650 (void) strlcpy(dsname, tmpname, 5651 MAXPATHLEN); 5652 } else { 5653 (void) snprintf(dsname, MAXPATHLEN, 5654 "%s/%s", poolname, ++cp); 5655 } 5656 VERIFY(nvlist_add_string(config, 5657 ZPOOL_CONFIG_BOOTFS, dsname) == 0); 5658 kmem_free(dsname, MAXPATHLEN); 5659 } 5660 kmem_free(tmpname, MAXPATHLEN); 5661 } 5662 5663 /* 5664 * Add the list of hot spares and level 2 cache devices. 5665 */ 5666 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 5667 spa_add_spares(spa, config); 5668 spa_add_l2cache(spa, config); 5669 spa_config_exit(spa, SCL_CONFIG, FTAG); 5670 } 5671 5672 spa_unload(spa); 5673 spa_deactivate(spa); 5674 spa_remove(spa); 5675 mutex_exit(&spa_namespace_lock); 5676 5677 return (config); 5678 } 5679 5680 /* 5681 * Pool export/destroy 5682 * 5683 * The act of destroying or exporting a pool is very simple. We make sure there 5684 * is no more pending I/O and any references to the pool are gone. Then, we 5685 * update the pool state and sync all the labels to disk, removing the 5686 * configuration from the cache afterwards. If the 'hardforce' flag is set, then 5687 * we don't sync the labels or remove the configuration cache. 5688 */ 5689 static int 5690 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, 5691 boolean_t force, boolean_t hardforce) 5692 { 5693 spa_t *spa; 5694 5695 if (oldconfig) 5696 *oldconfig = NULL; 5697 5698 if (!(spa_mode_global & FWRITE)) 5699 return (SET_ERROR(EROFS)); 5700 5701 mutex_enter(&spa_namespace_lock); 5702 if ((spa = spa_lookup(pool)) == NULL) { 5703 mutex_exit(&spa_namespace_lock); 5704 return (SET_ERROR(ENOENT)); 5705 } 5706 5707 /* 5708 * Put a hold on the pool, drop the namespace lock, stop async tasks, 5709 * reacquire the namespace lock, and see if we can export. 5710 */ 5711 spa_open_ref(spa, FTAG); 5712 mutex_exit(&spa_namespace_lock); 5713 spa_async_suspend(spa); 5714 mutex_enter(&spa_namespace_lock); 5715 spa_close(spa, FTAG); 5716 5717 /* 5718 * The pool will be in core if it's openable, 5719 * in which case we can modify its state. 5720 */ 5721 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { 5722 5723 /* 5724 * Objsets may be open only because they're dirty, so we 5725 * have to force it to sync before checking spa_refcnt. 5726 */ 5727 txg_wait_synced(spa->spa_dsl_pool, 0); 5728 spa_evicting_os_wait(spa); 5729 5730 /* 5731 * A pool cannot be exported or destroyed if there are active 5732 * references. If we are resetting a pool, allow references by 5733 * fault injection handlers. 5734 */ 5735 if (!spa_refcount_zero(spa) || 5736 (spa->spa_inject_ref != 0 && 5737 new_state != POOL_STATE_UNINITIALIZED)) { 5738 spa_async_resume(spa); 5739 mutex_exit(&spa_namespace_lock); 5740 return (SET_ERROR(EBUSY)); 5741 } 5742 5743 /* 5744 * A pool cannot be exported if it has an active shared spare. 5745 * This is to prevent other pools stealing the active spare 5746 * from an exported pool. At user's own will, such pool can 5747 * be forcedly exported. 5748 */ 5749 if (!force && new_state == POOL_STATE_EXPORTED && 5750 spa_has_active_shared_spare(spa)) { 5751 spa_async_resume(spa); 5752 mutex_exit(&spa_namespace_lock); 5753 return (SET_ERROR(EXDEV)); 5754 } 5755 5756 /* 5757 * We're about to export or destroy this pool. Make sure 5758 * we stop all initialization and trim activity here before 5759 * we set the spa_final_txg. This will ensure that all 5760 * dirty data resulting from the initialization is 5761 * committed to disk before we unload the pool. 5762 */ 5763 if (spa->spa_root_vdev != NULL) { 5764 vdev_t *rvd = spa->spa_root_vdev; 5765 vdev_initialize_stop_all(rvd, VDEV_INITIALIZE_ACTIVE); 5766 vdev_trim_stop_all(rvd, VDEV_TRIM_ACTIVE); 5767 vdev_autotrim_stop_all(spa); 5768 } 5769 5770 /* 5771 * We want this to be reflected on every label, 5772 * so mark them all dirty. spa_unload() will do the 5773 * final sync that pushes these changes out. 5774 */ 5775 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { 5776 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5777 spa->spa_state = new_state; 5778 spa->spa_final_txg = spa_last_synced_txg(spa) + 5779 TXG_DEFER_SIZE + 1; 5780 vdev_config_dirty(spa->spa_root_vdev); 5781 spa_config_exit(spa, SCL_ALL, FTAG); 5782 } 5783 } 5784 5785 spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_DESTROY); 5786 5787 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 5788 spa_unload(spa); 5789 spa_deactivate(spa); 5790 } 5791 5792 if (oldconfig && spa->spa_config) 5793 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); 5794 5795 if (new_state != POOL_STATE_UNINITIALIZED) { 5796 if (!hardforce) 5797 spa_write_cachefile(spa, B_TRUE, B_TRUE); 5798 spa_remove(spa); 5799 } 5800 mutex_exit(&spa_namespace_lock); 5801 5802 return (0); 5803 } 5804 5805 /* 5806 * Destroy a storage pool. 5807 */ 5808 int 5809 spa_destroy(char *pool) 5810 { 5811 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, 5812 B_FALSE, B_FALSE)); 5813 } 5814 5815 /* 5816 * Export a storage pool. 5817 */ 5818 int 5819 spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 5820 boolean_t hardforce) 5821 { 5822 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, 5823 force, hardforce)); 5824 } 5825 5826 /* 5827 * Similar to spa_export(), this unloads the spa_t without actually removing it 5828 * from the namespace in any way. 5829 */ 5830 int 5831 spa_reset(char *pool) 5832 { 5833 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, 5834 B_FALSE, B_FALSE)); 5835 } 5836 5837 /* 5838 * ========================================================================== 5839 * Device manipulation 5840 * ========================================================================== 5841 */ 5842 5843 /* 5844 * Add a device to a storage pool. 5845 */ 5846 int 5847 spa_vdev_add(spa_t *spa, nvlist_t *nvroot) 5848 { 5849 uint64_t txg, id; 5850 int error; 5851 vdev_t *rvd = spa->spa_root_vdev; 5852 vdev_t *vd, *tvd; 5853 nvlist_t **spares, **l2cache; 5854 uint_t nspares, nl2cache; 5855 5856 ASSERT(spa_writeable(spa)); 5857 5858 txg = spa_vdev_enter(spa); 5859 5860 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, 5861 VDEV_ALLOC_ADD)) != 0) 5862 return (spa_vdev_exit(spa, NULL, txg, error)); 5863 5864 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ 5865 5866 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, 5867 &nspares) != 0) 5868 nspares = 0; 5869 5870 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, 5871 &nl2cache) != 0) 5872 nl2cache = 0; 5873 5874 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) 5875 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 5876 5877 if (vd->vdev_children != 0 && 5878 (error = vdev_create(vd, txg, B_FALSE)) != 0) 5879 return (spa_vdev_exit(spa, vd, txg, error)); 5880 5881 /* 5882 * We must validate the spares and l2cache devices after checking the 5883 * children. Otherwise, vdev_inuse() will blindly overwrite the spare. 5884 */ 5885 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) 5886 return (spa_vdev_exit(spa, vd, txg, error)); 5887 5888 /* 5889 * If we are in the middle of a device removal, we can only add 5890 * devices which match the existing devices in the pool. 5891 * If we are in the middle of a removal, or have some indirect 5892 * vdevs, we can not add raidz toplevels. 5893 */ 5894 if (spa->spa_vdev_removal != NULL || 5895 spa->spa_removing_phys.sr_prev_indirect_vdev != -1) { 5896 for (int c = 0; c < vd->vdev_children; c++) { 5897 tvd = vd->vdev_child[c]; 5898 if (spa->spa_vdev_removal != NULL && 5899 tvd->vdev_ashift != spa->spa_max_ashift) { 5900 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 5901 } 5902 /* Fail if top level vdev is raidz */ 5903 if (tvd->vdev_ops == &vdev_raidz_ops) { 5904 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 5905 } 5906 /* 5907 * Need the top level mirror to be 5908 * a mirror of leaf vdevs only 5909 */ 5910 if (tvd->vdev_ops == &vdev_mirror_ops) { 5911 for (uint64_t cid = 0; 5912 cid < tvd->vdev_children; cid++) { 5913 vdev_t *cvd = tvd->vdev_child[cid]; 5914 if (!cvd->vdev_ops->vdev_op_leaf) { 5915 return (spa_vdev_exit(spa, vd, 5916 txg, EINVAL)); 5917 } 5918 } 5919 } 5920 } 5921 } 5922 5923 for (int c = 0; c < vd->vdev_children; c++) { 5924 5925 /* 5926 * Set the vdev id to the first hole, if one exists. 5927 */ 5928 for (id = 0; id < rvd->vdev_children; id++) { 5929 if (rvd->vdev_child[id]->vdev_ishole) { 5930 vdev_free(rvd->vdev_child[id]); 5931 break; 5932 } 5933 } 5934 tvd = vd->vdev_child[c]; 5935 vdev_remove_child(vd, tvd); 5936 tvd->vdev_id = id; 5937 vdev_add_child(rvd, tvd); 5938 vdev_config_dirty(tvd); 5939 } 5940 5941 if (nspares != 0) { 5942 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, 5943 ZPOOL_CONFIG_SPARES); 5944 spa_load_spares(spa); 5945 spa->spa_spares.sav_sync = B_TRUE; 5946 } 5947 5948 if (nl2cache != 0) { 5949 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, 5950 ZPOOL_CONFIG_L2CACHE); 5951 spa_load_l2cache(spa); 5952 spa->spa_l2cache.sav_sync = B_TRUE; 5953 } 5954 5955 /* 5956 * We have to be careful when adding new vdevs to an existing pool. 5957 * If other threads start allocating from these vdevs before we 5958 * sync the config cache, and we lose power, then upon reboot we may 5959 * fail to open the pool because there are DVAs that the config cache 5960 * can't translate. Therefore, we first add the vdevs without 5961 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); 5962 * and then let spa_config_update() initialize the new metaslabs. 5963 * 5964 * spa_load() checks for added-but-not-initialized vdevs, so that 5965 * if we lose power at any point in this sequence, the remaining 5966 * steps will be completed the next time we load the pool. 5967 */ 5968 (void) spa_vdev_exit(spa, vd, txg, 0); 5969 5970 mutex_enter(&spa_namespace_lock); 5971 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 5972 spa_event_notify(spa, NULL, NULL, ESC_ZFS_VDEV_ADD); 5973 mutex_exit(&spa_namespace_lock); 5974 5975 return (0); 5976 } 5977 5978 /* 5979 * Attach a device to a mirror. The arguments are the path to any device 5980 * in the mirror, and the nvroot for the new device. If the path specifies 5981 * a device that is not mirrored, we automatically insert the mirror vdev. 5982 * 5983 * If 'replacing' is specified, the new device is intended to replace the 5984 * existing device; in this case the two devices are made into their own 5985 * mirror using the 'replacing' vdev, which is functionally identical to 5986 * the mirror vdev (it actually reuses all the same ops) but has a few 5987 * extra rules: you can't attach to it after it's been created, and upon 5988 * completion of resilvering, the first disk (the one being replaced) 5989 * is automatically detached. 5990 */ 5991 int 5992 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 5993 { 5994 uint64_t txg, dtl_max_txg; 5995 vdev_t *rvd = spa->spa_root_vdev; 5996 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; 5997 vdev_ops_t *pvops; 5998 char *oldvdpath, *newvdpath; 5999 int newvd_isspare; 6000 int error; 6001 6002 ASSERT(spa_writeable(spa)); 6003 6004 txg = spa_vdev_enter(spa); 6005 6006 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); 6007 6008 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 6009 if (spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT)) { 6010 error = (spa_has_checkpoint(spa)) ? 6011 ZFS_ERR_CHECKPOINT_EXISTS : ZFS_ERR_DISCARDING_CHECKPOINT; 6012 return (spa_vdev_exit(spa, NULL, txg, error)); 6013 } 6014 6015 if (spa->spa_vdev_removal != NULL) 6016 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 6017 6018 if (oldvd == NULL) 6019 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 6020 6021 if (!oldvd->vdev_ops->vdev_op_leaf) 6022 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 6023 6024 pvd = oldvd->vdev_parent; 6025 6026 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, 6027 VDEV_ALLOC_ATTACH)) != 0) 6028 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 6029 6030 if (newrootvd->vdev_children != 1) 6031 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 6032 6033 newvd = newrootvd->vdev_child[0]; 6034 6035 if (!newvd->vdev_ops->vdev_op_leaf) 6036 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 6037 6038 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) 6039 return (spa_vdev_exit(spa, newrootvd, txg, error)); 6040 6041 /* 6042 * Spares can't replace logs 6043 */ 6044 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) 6045 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 6046 6047 if (!replacing) { 6048 /* 6049 * For attach, the only allowable parent is a mirror or the root 6050 * vdev. 6051 */ 6052 if (pvd->vdev_ops != &vdev_mirror_ops && 6053 pvd->vdev_ops != &vdev_root_ops) 6054 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 6055 6056 pvops = &vdev_mirror_ops; 6057 } else { 6058 /* 6059 * Active hot spares can only be replaced by inactive hot 6060 * spares. 6061 */ 6062 if (pvd->vdev_ops == &vdev_spare_ops && 6063 oldvd->vdev_isspare && 6064 !spa_has_spare(spa, newvd->vdev_guid)) 6065 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 6066 6067 /* 6068 * If the source is a hot spare, and the parent isn't already a 6069 * spare, then we want to create a new hot spare. Otherwise, we 6070 * want to create a replacing vdev. The user is not allowed to 6071 * attach to a spared vdev child unless the 'isspare' state is 6072 * the same (spare replaces spare, non-spare replaces 6073 * non-spare). 6074 */ 6075 if (pvd->vdev_ops == &vdev_replacing_ops && 6076 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { 6077 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 6078 } else if (pvd->vdev_ops == &vdev_spare_ops && 6079 newvd->vdev_isspare != oldvd->vdev_isspare) { 6080 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 6081 } 6082 6083 if (newvd->vdev_isspare) 6084 pvops = &vdev_spare_ops; 6085 else 6086 pvops = &vdev_replacing_ops; 6087 } 6088 6089 /* 6090 * Make sure the new device is big enough. 6091 */ 6092 if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) 6093 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); 6094 6095 /* 6096 * The new device cannot have a higher alignment requirement 6097 * than the top-level vdev. 6098 */ 6099 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) 6100 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); 6101 6102 /* 6103 * If this is an in-place replacement, update oldvd's path and devid 6104 * to make it distinguishable from newvd, and unopenable from now on. 6105 */ 6106 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { 6107 spa_strfree(oldvd->vdev_path); 6108 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, 6109 KM_SLEEP); 6110 (void) sprintf(oldvd->vdev_path, "%s/%s", 6111 newvd->vdev_path, "old"); 6112 if (oldvd->vdev_devid != NULL) { 6113 spa_strfree(oldvd->vdev_devid); 6114 oldvd->vdev_devid = NULL; 6115 } 6116 } 6117 6118 /* mark the device being resilvered */ 6119 newvd->vdev_resilver_txg = txg; 6120 6121 /* 6122 * If the parent is not a mirror, or if we're replacing, insert the new 6123 * mirror/replacing/spare vdev above oldvd. 6124 */ 6125 if (pvd->vdev_ops != pvops) 6126 pvd = vdev_add_parent(oldvd, pvops); 6127 6128 ASSERT(pvd->vdev_top->vdev_parent == rvd); 6129 ASSERT(pvd->vdev_ops == pvops); 6130 ASSERT(oldvd->vdev_parent == pvd); 6131 6132 /* 6133 * Extract the new device from its root and add it to pvd. 6134 */ 6135 vdev_remove_child(newrootvd, newvd); 6136 newvd->vdev_id = pvd->vdev_children; 6137 newvd->vdev_crtxg = oldvd->vdev_crtxg; 6138 vdev_add_child(pvd, newvd); 6139 6140 tvd = newvd->vdev_top; 6141 ASSERT(pvd->vdev_top == tvd); 6142 ASSERT(tvd->vdev_parent == rvd); 6143 6144 vdev_config_dirty(tvd); 6145 6146 /* 6147 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account 6148 * for any dmu_sync-ed blocks. It will propagate upward when 6149 * spa_vdev_exit() calls vdev_dtl_reassess(). 6150 */ 6151 dtl_max_txg = txg + TXG_CONCURRENT_STATES; 6152 6153 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, 6154 dtl_max_txg - TXG_INITIAL); 6155 6156 if (newvd->vdev_isspare) { 6157 spa_spare_activate(newvd); 6158 spa_event_notify(spa, newvd, NULL, ESC_ZFS_VDEV_SPARE); 6159 } 6160 6161 oldvdpath = spa_strdup(oldvd->vdev_path); 6162 newvdpath = spa_strdup(newvd->vdev_path); 6163 newvd_isspare = newvd->vdev_isspare; 6164 6165 /* 6166 * Mark newvd's DTL dirty in this txg. 6167 */ 6168 vdev_dirty(tvd, VDD_DTL, newvd, txg); 6169 6170 /* 6171 * Schedule the resilver to restart in the future. We do this to 6172 * ensure that dmu_sync-ed blocks have been stitched into the 6173 * respective datasets. We do not do this if resilvers have been 6174 * deferred. 6175 */ 6176 if (dsl_scan_resilvering(spa_get_dsl(spa)) && 6177 spa_feature_is_enabled(spa, SPA_FEATURE_RESILVER_DEFER)) 6178 vdev_set_deferred_resilver(spa, newvd); 6179 else 6180 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); 6181 6182 if (spa->spa_bootfs) 6183 spa_event_notify(spa, newvd, NULL, ESC_ZFS_BOOTFS_VDEV_ATTACH); 6184 6185 spa_event_notify(spa, newvd, NULL, ESC_ZFS_VDEV_ATTACH); 6186 6187 /* 6188 * Commit the config 6189 */ 6190 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); 6191 6192 spa_history_log_internal(spa, "vdev attach", NULL, 6193 "%s vdev=%s %s vdev=%s", 6194 replacing && newvd_isspare ? "spare in" : 6195 replacing ? "replace" : "attach", newvdpath, 6196 replacing ? "for" : "to", oldvdpath); 6197 6198 spa_strfree(oldvdpath); 6199 spa_strfree(newvdpath); 6200 6201 return (0); 6202 } 6203 6204 /* 6205 * Detach a device from a mirror or replacing vdev. 6206 * 6207 * If 'replace_done' is specified, only detach if the parent 6208 * is a replacing vdev. 6209 */ 6210 int 6211 spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) 6212 { 6213 uint64_t txg; 6214 int error; 6215 vdev_t *rvd = spa->spa_root_vdev; 6216 vdev_t *vd, *pvd, *cvd, *tvd; 6217 boolean_t unspare = B_FALSE; 6218 uint64_t unspare_guid = 0; 6219 char *vdpath; 6220 6221 ASSERT(spa_writeable(spa)); 6222 6223 txg = spa_vdev_enter(spa); 6224 6225 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 6226 6227 /* 6228 * Besides being called directly from the userland through the 6229 * ioctl interface, spa_vdev_detach() can be potentially called 6230 * at the end of spa_vdev_resilver_done(). 6231 * 6232 * In the regular case, when we have a checkpoint this shouldn't 6233 * happen as we never empty the DTLs of a vdev during the scrub 6234 * [see comment in dsl_scan_done()]. Thus spa_vdev_resilvering_done() 6235 * should never get here when we have a checkpoint. 6236 * 6237 * That said, even in a case when we checkpoint the pool exactly 6238 * as spa_vdev_resilver_done() calls this function everything 6239 * should be fine as the resilver will return right away. 6240 */ 6241 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 6242 if (spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT)) { 6243 error = (spa_has_checkpoint(spa)) ? 6244 ZFS_ERR_CHECKPOINT_EXISTS : ZFS_ERR_DISCARDING_CHECKPOINT; 6245 return (spa_vdev_exit(spa, NULL, txg, error)); 6246 } 6247 6248 if (vd == NULL) 6249 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 6250 6251 if (!vd->vdev_ops->vdev_op_leaf) 6252 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 6253 6254 pvd = vd->vdev_parent; 6255 6256 /* 6257 * If the parent/child relationship is not as expected, don't do it. 6258 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing 6259 * vdev that's replacing B with C. The user's intent in replacing 6260 * is to go from M(A,B) to M(A,C). If the user decides to cancel 6261 * the replace by detaching C, the expected behavior is to end up 6262 * M(A,B). But suppose that right after deciding to detach C, 6263 * the replacement of B completes. We would have M(A,C), and then 6264 * ask to detach C, which would leave us with just A -- not what 6265 * the user wanted. To prevent this, we make sure that the 6266 * parent/child relationship hasn't changed -- in this example, 6267 * that C's parent is still the replacing vdev R. 6268 */ 6269 if (pvd->vdev_guid != pguid && pguid != 0) 6270 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 6271 6272 /* 6273 * Only 'replacing' or 'spare' vdevs can be replaced. 6274 */ 6275 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && 6276 pvd->vdev_ops != &vdev_spare_ops) 6277 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 6278 6279 ASSERT(pvd->vdev_ops != &vdev_spare_ops || 6280 spa_version(spa) >= SPA_VERSION_SPARES); 6281 6282 /* 6283 * Only mirror, replacing, and spare vdevs support detach. 6284 */ 6285 if (pvd->vdev_ops != &vdev_replacing_ops && 6286 pvd->vdev_ops != &vdev_mirror_ops && 6287 pvd->vdev_ops != &vdev_spare_ops) 6288 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 6289 6290 /* 6291 * If this device has the only valid copy of some data, 6292 * we cannot safely detach it. 6293 */ 6294 if (vdev_dtl_required(vd)) 6295 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 6296 6297 ASSERT(pvd->vdev_children >= 2); 6298 6299 /* 6300 * If we are detaching the second disk from a replacing vdev, then 6301 * check to see if we changed the original vdev's path to have "/old" 6302 * at the end in spa_vdev_attach(). If so, undo that change now. 6303 */ 6304 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && 6305 vd->vdev_path != NULL) { 6306 size_t len = strlen(vd->vdev_path); 6307 6308 for (int c = 0; c < pvd->vdev_children; c++) { 6309 cvd = pvd->vdev_child[c]; 6310 6311 if (cvd == vd || cvd->vdev_path == NULL) 6312 continue; 6313 6314 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && 6315 strcmp(cvd->vdev_path + len, "/old") == 0) { 6316 spa_strfree(cvd->vdev_path); 6317 cvd->vdev_path = spa_strdup(vd->vdev_path); 6318 break; 6319 } 6320 } 6321 } 6322 6323 /* 6324 * If we are detaching the original disk from a spare, then it implies 6325 * that the spare should become a real disk, and be removed from the 6326 * active spare list for the pool. 6327 */ 6328 if (pvd->vdev_ops == &vdev_spare_ops && 6329 vd->vdev_id == 0 && 6330 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) 6331 unspare = B_TRUE; 6332 6333 /* 6334 * Erase the disk labels so the disk can be used for other things. 6335 * This must be done after all other error cases are handled, 6336 * but before we disembowel vd (so we can still do I/O to it). 6337 * But if we can't do it, don't treat the error as fatal -- 6338 * it may be that the unwritability of the disk is the reason 6339 * it's being detached! 6340 */ 6341 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 6342 6343 /* 6344 * Remove vd from its parent and compact the parent's children. 6345 */ 6346 vdev_remove_child(pvd, vd); 6347 vdev_compact_children(pvd); 6348 6349 /* 6350 * Remember one of the remaining children so we can get tvd below. 6351 */ 6352 cvd = pvd->vdev_child[pvd->vdev_children - 1]; 6353 6354 /* 6355 * If we need to remove the remaining child from the list of hot spares, 6356 * do it now, marking the vdev as no longer a spare in the process. 6357 * We must do this before vdev_remove_parent(), because that can 6358 * change the GUID if it creates a new toplevel GUID. For a similar 6359 * reason, we must remove the spare now, in the same txg as the detach; 6360 * otherwise someone could attach a new sibling, change the GUID, and 6361 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. 6362 */ 6363 if (unspare) { 6364 ASSERT(cvd->vdev_isspare); 6365 spa_spare_remove(cvd); 6366 unspare_guid = cvd->vdev_guid; 6367 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); 6368 cvd->vdev_unspare = B_TRUE; 6369 } 6370 6371 /* 6372 * If the parent mirror/replacing vdev only has one child, 6373 * the parent is no longer needed. Remove it from the tree. 6374 */ 6375 if (pvd->vdev_children == 1) { 6376 if (pvd->vdev_ops == &vdev_spare_ops) 6377 cvd->vdev_unspare = B_FALSE; 6378 vdev_remove_parent(cvd); 6379 } 6380 6381 /* 6382 * We don't set tvd until now because the parent we just removed 6383 * may have been the previous top-level vdev. 6384 */ 6385 tvd = cvd->vdev_top; 6386 ASSERT(tvd->vdev_parent == rvd); 6387 6388 /* 6389 * Reevaluate the parent vdev state. 6390 */ 6391 vdev_propagate_state(cvd); 6392 6393 /* 6394 * If the 'autoexpand' property is set on the pool then automatically 6395 * try to expand the size of the pool. For example if the device we 6396 * just detached was smaller than the others, it may be possible to 6397 * add metaslabs (i.e. grow the pool). We need to reopen the vdev 6398 * first so that we can obtain the updated sizes of the leaf vdevs. 6399 */ 6400 if (spa->spa_autoexpand) { 6401 vdev_reopen(tvd); 6402 vdev_expand(tvd, txg); 6403 } 6404 6405 vdev_config_dirty(tvd); 6406 6407 /* 6408 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that 6409 * vd->vdev_detached is set and free vd's DTL object in syncing context. 6410 * But first make sure we're not on any *other* txg's DTL list, to 6411 * prevent vd from being accessed after it's freed. 6412 */ 6413 vdpath = spa_strdup(vd->vdev_path); 6414 for (int t = 0; t < TXG_SIZE; t++) 6415 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); 6416 vd->vdev_detached = B_TRUE; 6417 vdev_dirty(tvd, VDD_DTL, vd, txg); 6418 6419 spa_event_notify(spa, vd, NULL, ESC_ZFS_VDEV_REMOVE); 6420 6421 /* hang on to the spa before we release the lock */ 6422 spa_open_ref(spa, FTAG); 6423 6424 error = spa_vdev_exit(spa, vd, txg, 0); 6425 6426 spa_history_log_internal(spa, "detach", NULL, 6427 "vdev=%s", vdpath); 6428 spa_strfree(vdpath); 6429 6430 /* 6431 * If this was the removal of the original device in a hot spare vdev, 6432 * then we want to go through and remove the device from the hot spare 6433 * list of every other pool. 6434 */ 6435 if (unspare) { 6436 spa_t *altspa = NULL; 6437 6438 mutex_enter(&spa_namespace_lock); 6439 while ((altspa = spa_next(altspa)) != NULL) { 6440 if (altspa->spa_state != POOL_STATE_ACTIVE || 6441 altspa == spa) 6442 continue; 6443 6444 spa_open_ref(altspa, FTAG); 6445 mutex_exit(&spa_namespace_lock); 6446 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); 6447 mutex_enter(&spa_namespace_lock); 6448 spa_close(altspa, FTAG); 6449 } 6450 mutex_exit(&spa_namespace_lock); 6451 6452 /* search the rest of the vdevs for spares to remove */ 6453 spa_vdev_resilver_done(spa); 6454 } 6455 6456 /* all done with the spa; OK to release */ 6457 mutex_enter(&spa_namespace_lock); 6458 spa_close(spa, FTAG); 6459 mutex_exit(&spa_namespace_lock); 6460 6461 return (error); 6462 } 6463 6464 static int 6465 spa_vdev_initialize_impl(spa_t *spa, uint64_t guid, uint64_t cmd_type, 6466 list_t *vd_list) 6467 { 6468 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 6469 6470 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6471 6472 /* Look up vdev and ensure it's a leaf. */ 6473 vdev_t *vd = spa_lookup_by_guid(spa, guid, B_FALSE); 6474 if (vd == NULL || vd->vdev_detached) { 6475 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6476 return (SET_ERROR(ENODEV)); 6477 } else if (!vd->vdev_ops->vdev_op_leaf || !vdev_is_concrete(vd)) { 6478 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6479 return (SET_ERROR(EINVAL)); 6480 } else if (!vdev_writeable(vd)) { 6481 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6482 return (SET_ERROR(EROFS)); 6483 } 6484 mutex_enter(&vd->vdev_initialize_lock); 6485 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6486 6487 /* 6488 * When we activate an initialize action we check to see 6489 * if the vdev_initialize_thread is NULL. We do this instead 6490 * of using the vdev_initialize_state since there might be 6491 * a previous initialization process which has completed but 6492 * the thread is not exited. 6493 */ 6494 if (cmd_type == POOL_INITIALIZE_START && 6495 (vd->vdev_initialize_thread != NULL || 6496 vd->vdev_top->vdev_removing)) { 6497 mutex_exit(&vd->vdev_initialize_lock); 6498 return (SET_ERROR(EBUSY)); 6499 } else if (cmd_type == POOL_INITIALIZE_CANCEL && 6500 (vd->vdev_initialize_state != VDEV_INITIALIZE_ACTIVE && 6501 vd->vdev_initialize_state != VDEV_INITIALIZE_SUSPENDED)) { 6502 mutex_exit(&vd->vdev_initialize_lock); 6503 return (SET_ERROR(ESRCH)); 6504 } else if (cmd_type == POOL_INITIALIZE_SUSPEND && 6505 vd->vdev_initialize_state != VDEV_INITIALIZE_ACTIVE) { 6506 mutex_exit(&vd->vdev_initialize_lock); 6507 return (SET_ERROR(ESRCH)); 6508 } 6509 6510 switch (cmd_type) { 6511 case POOL_INITIALIZE_START: 6512 vdev_initialize(vd); 6513 break; 6514 case POOL_INITIALIZE_CANCEL: 6515 vdev_initialize_stop(vd, VDEV_INITIALIZE_CANCELED, vd_list); 6516 break; 6517 case POOL_INITIALIZE_SUSPEND: 6518 vdev_initialize_stop(vd, VDEV_INITIALIZE_SUSPENDED, vd_list); 6519 break; 6520 default: 6521 panic("invalid cmd_type %llu", (unsigned long long)cmd_type); 6522 } 6523 mutex_exit(&vd->vdev_initialize_lock); 6524 6525 return (0); 6526 } 6527 6528 int 6529 spa_vdev_initialize(spa_t *spa, nvlist_t *nv, uint64_t cmd_type, 6530 nvlist_t *vdev_errlist) 6531 { 6532 int total_errors = 0; 6533 list_t vd_list; 6534 6535 list_create(&vd_list, sizeof (vdev_t), 6536 offsetof(vdev_t, vdev_initialize_node)); 6537 6538 /* 6539 * We hold the namespace lock through the whole function 6540 * to prevent any changes to the pool while we're starting or 6541 * stopping initialization. The config and state locks are held so that 6542 * we can properly assess the vdev state before we commit to 6543 * the initializing operation. 6544 */ 6545 mutex_enter(&spa_namespace_lock); 6546 6547 for (nvpair_t *pair = nvlist_next_nvpair(nv, NULL); 6548 pair != NULL; pair = nvlist_next_nvpair(nv, pair)) { 6549 uint64_t vdev_guid = fnvpair_value_uint64(pair); 6550 6551 int error = spa_vdev_initialize_impl(spa, vdev_guid, cmd_type, 6552 &vd_list); 6553 if (error != 0) { 6554 char guid_as_str[MAXNAMELEN]; 6555 6556 (void) snprintf(guid_as_str, sizeof (guid_as_str), 6557 "%llu", (unsigned long long)vdev_guid); 6558 fnvlist_add_int64(vdev_errlist, guid_as_str, error); 6559 total_errors++; 6560 } 6561 } 6562 6563 /* Wait for all initialize threads to stop. */ 6564 vdev_initialize_stop_wait(spa, &vd_list); 6565 6566 /* Sync out the initializing state */ 6567 txg_wait_synced(spa->spa_dsl_pool, 0); 6568 mutex_exit(&spa_namespace_lock); 6569 6570 list_destroy(&vd_list); 6571 6572 return (total_errors); 6573 } 6574 6575 static int 6576 spa_vdev_trim_impl(spa_t *spa, uint64_t guid, uint64_t cmd_type, 6577 uint64_t rate, boolean_t partial, boolean_t secure, list_t *vd_list) 6578 { 6579 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 6580 6581 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6582 6583 /* Look up vdev and ensure it's a leaf. */ 6584 vdev_t *vd = spa_lookup_by_guid(spa, guid, B_FALSE); 6585 if (vd == NULL || vd->vdev_detached) { 6586 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6587 return (SET_ERROR(ENODEV)); 6588 } else if (!vd->vdev_ops->vdev_op_leaf || !vdev_is_concrete(vd)) { 6589 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6590 return (SET_ERROR(EINVAL)); 6591 } else if (!vdev_writeable(vd)) { 6592 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6593 return (SET_ERROR(EROFS)); 6594 } else if (!vd->vdev_has_trim) { 6595 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6596 return (SET_ERROR(EOPNOTSUPP)); 6597 } else if (secure && !vd->vdev_has_securetrim) { 6598 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6599 return (SET_ERROR(EOPNOTSUPP)); 6600 } 6601 mutex_enter(&vd->vdev_trim_lock); 6602 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6603 6604 /* 6605 * When we activate a TRIM action we check to see if the 6606 * vdev_trim_thread is NULL. We do this instead of using the 6607 * vdev_trim_state since there might be a previous TRIM process 6608 * which has completed but the thread is not exited. 6609 */ 6610 if (cmd_type == POOL_TRIM_START && 6611 (vd->vdev_trim_thread != NULL || vd->vdev_top->vdev_removing)) { 6612 mutex_exit(&vd->vdev_trim_lock); 6613 return (SET_ERROR(EBUSY)); 6614 } else if (cmd_type == POOL_TRIM_CANCEL && 6615 (vd->vdev_trim_state != VDEV_TRIM_ACTIVE && 6616 vd->vdev_trim_state != VDEV_TRIM_SUSPENDED)) { 6617 mutex_exit(&vd->vdev_trim_lock); 6618 return (SET_ERROR(ESRCH)); 6619 } else if (cmd_type == POOL_TRIM_SUSPEND && 6620 vd->vdev_trim_state != VDEV_TRIM_ACTIVE) { 6621 mutex_exit(&vd->vdev_trim_lock); 6622 return (SET_ERROR(ESRCH)); 6623 } 6624 6625 switch (cmd_type) { 6626 case POOL_TRIM_START: 6627 vdev_trim(vd, rate, partial, secure); 6628 break; 6629 case POOL_TRIM_CANCEL: 6630 vdev_trim_stop(vd, VDEV_TRIM_CANCELED, vd_list); 6631 break; 6632 case POOL_TRIM_SUSPEND: 6633 vdev_trim_stop(vd, VDEV_TRIM_SUSPENDED, vd_list); 6634 break; 6635 default: 6636 panic("invalid cmd_type %llu", (unsigned long long)cmd_type); 6637 } 6638 mutex_exit(&vd->vdev_trim_lock); 6639 6640 return (0); 6641 } 6642 6643 /* 6644 * Initiates a manual TRIM for the requested vdevs. This kicks off individual 6645 * TRIM threads for each child vdev. These threads pass over all of the free 6646 * space in the vdev's metaslabs and issues TRIM commands for that space. 6647 */ 6648 int 6649 spa_vdev_trim(spa_t *spa, nvlist_t *nv, uint64_t cmd_type, uint64_t rate, 6650 boolean_t partial, boolean_t secure, nvlist_t *vdev_errlist) 6651 { 6652 int total_errors = 0; 6653 list_t vd_list; 6654 6655 list_create(&vd_list, sizeof (vdev_t), 6656 offsetof(vdev_t, vdev_trim_node)); 6657 6658 /* 6659 * We hold the namespace lock through the whole function 6660 * to prevent any changes to the pool while we're starting or 6661 * stopping TRIM. The config and state locks are held so that 6662 * we can properly assess the vdev state before we commit to 6663 * the TRIM operation. 6664 */ 6665 mutex_enter(&spa_namespace_lock); 6666 6667 for (nvpair_t *pair = nvlist_next_nvpair(nv, NULL); 6668 pair != NULL; pair = nvlist_next_nvpair(nv, pair)) { 6669 uint64_t vdev_guid = fnvpair_value_uint64(pair); 6670 6671 int error = spa_vdev_trim_impl(spa, vdev_guid, cmd_type, 6672 rate, partial, secure, &vd_list); 6673 if (error != 0) { 6674 char guid_as_str[MAXNAMELEN]; 6675 6676 (void) snprintf(guid_as_str, sizeof (guid_as_str), 6677 "%llu", (unsigned long long)vdev_guid); 6678 fnvlist_add_int64(vdev_errlist, guid_as_str, error); 6679 total_errors++; 6680 } 6681 } 6682 6683 /* Wait for all TRIM threads to stop. */ 6684 vdev_trim_stop_wait(spa, &vd_list); 6685 6686 /* Sync out the TRIM state */ 6687 txg_wait_synced(spa->spa_dsl_pool, 0); 6688 mutex_exit(&spa_namespace_lock); 6689 6690 list_destroy(&vd_list); 6691 6692 return (total_errors); 6693 } 6694 6695 /* 6696 * Split a set of devices from their mirrors, and create a new pool from them. 6697 */ 6698 int 6699 spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 6700 nvlist_t *props, boolean_t exp) 6701 { 6702 int error = 0; 6703 uint64_t txg, *glist; 6704 spa_t *newspa; 6705 uint_t c, children, lastlog; 6706 nvlist_t **child, *nvl, *tmp; 6707 dmu_tx_t *tx; 6708 char *altroot = NULL; 6709 vdev_t *rvd, **vml = NULL; /* vdev modify list */ 6710 boolean_t activate_slog; 6711 6712 ASSERT(spa_writeable(spa)); 6713 6714 txg = spa_vdev_enter(spa); 6715 6716 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 6717 if (spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT)) { 6718 error = (spa_has_checkpoint(spa)) ? 6719 ZFS_ERR_CHECKPOINT_EXISTS : ZFS_ERR_DISCARDING_CHECKPOINT; 6720 return (spa_vdev_exit(spa, NULL, txg, error)); 6721 } 6722 6723 /* clear the log and flush everything up to now */ 6724 activate_slog = spa_passivate_log(spa); 6725 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 6726 error = spa_reset_logs(spa); 6727 txg = spa_vdev_config_enter(spa); 6728 6729 if (activate_slog) 6730 spa_activate_log(spa); 6731 6732 if (error != 0) 6733 return (spa_vdev_exit(spa, NULL, txg, error)); 6734 6735 /* check new spa name before going any further */ 6736 if (spa_lookup(newname) != NULL) 6737 return (spa_vdev_exit(spa, NULL, txg, EEXIST)); 6738 6739 /* 6740 * scan through all the children to ensure they're all mirrors 6741 */ 6742 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || 6743 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, 6744 &children) != 0) 6745 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 6746 6747 /* first, check to ensure we've got the right child count */ 6748 rvd = spa->spa_root_vdev; 6749 lastlog = 0; 6750 for (c = 0; c < rvd->vdev_children; c++) { 6751 vdev_t *vd = rvd->vdev_child[c]; 6752 6753 /* don't count the holes & logs as children */ 6754 if (vd->vdev_islog || !vdev_is_concrete(vd)) { 6755 if (lastlog == 0) 6756 lastlog = c; 6757 continue; 6758 } 6759 6760 lastlog = 0; 6761 } 6762 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) 6763 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 6764 6765 /* next, ensure no spare or cache devices are part of the split */ 6766 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || 6767 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) 6768 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 6769 6770 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); 6771 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); 6772 6773 /* then, loop over each vdev and validate it */ 6774 for (c = 0; c < children; c++) { 6775 uint64_t is_hole = 0; 6776 6777 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 6778 &is_hole); 6779 6780 if (is_hole != 0) { 6781 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || 6782 spa->spa_root_vdev->vdev_child[c]->vdev_islog) { 6783 continue; 6784 } else { 6785 error = SET_ERROR(EINVAL); 6786 break; 6787 } 6788 } 6789 6790 /* which disk is going to be split? */ 6791 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, 6792 &glist[c]) != 0) { 6793 error = SET_ERROR(EINVAL); 6794 break; 6795 } 6796 6797 /* look it up in the spa */ 6798 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); 6799 if (vml[c] == NULL) { 6800 error = SET_ERROR(ENODEV); 6801 break; 6802 } 6803 6804 /* make sure there's nothing stopping the split */ 6805 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || 6806 vml[c]->vdev_islog || 6807 !vdev_is_concrete(vml[c]) || 6808 vml[c]->vdev_isspare || 6809 vml[c]->vdev_isl2cache || 6810 !vdev_writeable(vml[c]) || 6811 vml[c]->vdev_children != 0 || 6812 vml[c]->vdev_state != VDEV_STATE_HEALTHY || 6813 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { 6814 error = SET_ERROR(EINVAL); 6815 break; 6816 } 6817 6818 if (vdev_dtl_required(vml[c])) { 6819 error = SET_ERROR(EBUSY); 6820 break; 6821 } 6822 6823 /* we need certain info from the top level */ 6824 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, 6825 vml[c]->vdev_top->vdev_ms_array) == 0); 6826 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, 6827 vml[c]->vdev_top->vdev_ms_shift) == 0); 6828 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, 6829 vml[c]->vdev_top->vdev_asize) == 0); 6830 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, 6831 vml[c]->vdev_top->vdev_ashift) == 0); 6832 6833 /* transfer per-vdev ZAPs */ 6834 ASSERT3U(vml[c]->vdev_leaf_zap, !=, 0); 6835 VERIFY0(nvlist_add_uint64(child[c], 6836 ZPOOL_CONFIG_VDEV_LEAF_ZAP, vml[c]->vdev_leaf_zap)); 6837 6838 ASSERT3U(vml[c]->vdev_top->vdev_top_zap, !=, 0); 6839 VERIFY0(nvlist_add_uint64(child[c], 6840 ZPOOL_CONFIG_VDEV_TOP_ZAP, 6841 vml[c]->vdev_parent->vdev_top_zap)); 6842 } 6843 6844 if (error != 0) { 6845 kmem_free(vml, children * sizeof (vdev_t *)); 6846 kmem_free(glist, children * sizeof (uint64_t)); 6847 return (spa_vdev_exit(spa, NULL, txg, error)); 6848 } 6849 6850 /* stop writers from using the disks */ 6851 for (c = 0; c < children; c++) { 6852 if (vml[c] != NULL) 6853 vml[c]->vdev_offline = B_TRUE; 6854 } 6855 vdev_reopen(spa->spa_root_vdev); 6856 6857 /* 6858 * Temporarily record the splitting vdevs in the spa config. This 6859 * will disappear once the config is regenerated. 6860 */ 6861 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 6862 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 6863 glist, children) == 0); 6864 kmem_free(glist, children * sizeof (uint64_t)); 6865 6866 mutex_enter(&spa->spa_props_lock); 6867 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, 6868 nvl) == 0); 6869 mutex_exit(&spa->spa_props_lock); 6870 spa->spa_config_splitting = nvl; 6871 vdev_config_dirty(spa->spa_root_vdev); 6872 6873 /* configure and create the new pool */ 6874 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); 6875 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 6876 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); 6877 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 6878 spa_version(spa)) == 0); 6879 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 6880 spa->spa_config_txg) == 0); 6881 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 6882 spa_generate_guid(NULL)) == 0); 6883 VERIFY0(nvlist_add_boolean(config, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)); 6884 (void) nvlist_lookup_string(props, 6885 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 6886 6887 /* add the new pool to the namespace */ 6888 newspa = spa_add(newname, config, altroot); 6889 newspa->spa_avz_action = AVZ_ACTION_REBUILD; 6890 newspa->spa_config_txg = spa->spa_config_txg; 6891 spa_set_log_state(newspa, SPA_LOG_CLEAR); 6892 6893 /* release the spa config lock, retaining the namespace lock */ 6894 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 6895 6896 if (zio_injection_enabled) 6897 zio_handle_panic_injection(spa, FTAG, 1); 6898 6899 spa_activate(newspa, spa_mode_global); 6900 spa_async_suspend(newspa); 6901 6902 /* 6903 * Temporarily stop the initializing and TRIM activity. We set the 6904 * state to ACTIVE so that we know to resume initializing or TRIM 6905 * once the split has completed. 6906 */ 6907 list_t vd_initialize_list; 6908 list_create(&vd_initialize_list, sizeof (vdev_t), 6909 offsetof(vdev_t, vdev_initialize_node)); 6910 6911 list_t vd_trim_list; 6912 list_create(&vd_trim_list, sizeof (vdev_t), 6913 offsetof(vdev_t, vdev_trim_node)); 6914 6915 for (c = 0; c < children; c++) { 6916 if (vml[c] != NULL) { 6917 mutex_enter(&vml[c]->vdev_initialize_lock); 6918 vdev_initialize_stop(vml[c], 6919 VDEV_INITIALIZE_ACTIVE, &vd_initialize_list); 6920 mutex_exit(&vml[c]->vdev_initialize_lock); 6921 6922 mutex_enter(&vml[c]->vdev_trim_lock); 6923 vdev_trim_stop(vml[c], VDEV_TRIM_ACTIVE, &vd_trim_list); 6924 mutex_exit(&vml[c]->vdev_trim_lock); 6925 } 6926 } 6927 6928 vdev_initialize_stop_wait(spa, &vd_initialize_list); 6929 vdev_trim_stop_wait(spa, &vd_trim_list); 6930 6931 list_destroy(&vd_initialize_list); 6932 list_destroy(&vd_trim_list); 6933 6934 newspa->spa_config_source = SPA_CONFIG_SRC_SPLIT; 6935 6936 /* create the new pool from the disks of the original pool */ 6937 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE); 6938 if (error) 6939 goto out; 6940 6941 /* if that worked, generate a real config for the new pool */ 6942 if (newspa->spa_root_vdev != NULL) { 6943 VERIFY(nvlist_alloc(&newspa->spa_config_splitting, 6944 NV_UNIQUE_NAME, KM_SLEEP) == 0); 6945 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, 6946 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); 6947 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, 6948 B_TRUE)); 6949 } 6950 6951 /* set the props */ 6952 if (props != NULL) { 6953 spa_configfile_set(newspa, props, B_FALSE); 6954 error = spa_prop_set(newspa, props); 6955 if (error) 6956 goto out; 6957 } 6958 6959 /* flush everything */ 6960 txg = spa_vdev_config_enter(newspa); 6961 vdev_config_dirty(newspa->spa_root_vdev); 6962 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); 6963 6964 if (zio_injection_enabled) 6965 zio_handle_panic_injection(spa, FTAG, 2); 6966 6967 spa_async_resume(newspa); 6968 6969 /* finally, update the original pool's config */ 6970 txg = spa_vdev_config_enter(spa); 6971 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 6972 error = dmu_tx_assign(tx, TXG_WAIT); 6973 if (error != 0) 6974 dmu_tx_abort(tx); 6975 for (c = 0; c < children; c++) { 6976 if (vml[c] != NULL) { 6977 vdev_split(vml[c]); 6978 if (error == 0) 6979 spa_history_log_internal(spa, "detach", tx, 6980 "vdev=%s", vml[c]->vdev_path); 6981 6982 vdev_free(vml[c]); 6983 } 6984 } 6985 spa->spa_avz_action = AVZ_ACTION_REBUILD; 6986 vdev_config_dirty(spa->spa_root_vdev); 6987 spa->spa_config_splitting = NULL; 6988 nvlist_free(nvl); 6989 if (error == 0) 6990 dmu_tx_commit(tx); 6991 (void) spa_vdev_exit(spa, NULL, txg, 0); 6992 6993 if (zio_injection_enabled) 6994 zio_handle_panic_injection(spa, FTAG, 3); 6995 6996 /* split is complete; log a history record */ 6997 spa_history_log_internal(newspa, "split", NULL, 6998 "from pool %s", spa_name(spa)); 6999 7000 kmem_free(vml, children * sizeof (vdev_t *)); 7001 7002 /* if we're not going to mount the filesystems in userland, export */ 7003 if (exp) 7004 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, 7005 B_FALSE, B_FALSE); 7006 7007 return (error); 7008 7009 out: 7010 spa_unload(newspa); 7011 spa_deactivate(newspa); 7012 spa_remove(newspa); 7013 7014 txg = spa_vdev_config_enter(spa); 7015 7016 /* re-online all offlined disks */ 7017 for (c = 0; c < children; c++) { 7018 if (vml[c] != NULL) 7019 vml[c]->vdev_offline = B_FALSE; 7020 } 7021 7022 /* restart initializing or trimming disks as necessary */ 7023 spa_async_request(spa, SPA_ASYNC_INITIALIZE_RESTART); 7024 spa_async_request(spa, SPA_ASYNC_TRIM_RESTART); 7025 spa_async_request(spa, SPA_ASYNC_AUTOTRIM_RESTART); 7026 7027 vdev_reopen(spa->spa_root_vdev); 7028 7029 nvlist_free(spa->spa_config_splitting); 7030 spa->spa_config_splitting = NULL; 7031 (void) spa_vdev_exit(spa, NULL, txg, error); 7032 7033 kmem_free(vml, children * sizeof (vdev_t *)); 7034 return (error); 7035 } 7036 7037 /* 7038 * Find any device that's done replacing, or a vdev marked 'unspare' that's 7039 * currently spared, so we can detach it. 7040 */ 7041 static vdev_t * 7042 spa_vdev_resilver_done_hunt(vdev_t *vd) 7043 { 7044 vdev_t *newvd, *oldvd; 7045 7046 for (int c = 0; c < vd->vdev_children; c++) { 7047 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); 7048 if (oldvd != NULL) 7049 return (oldvd); 7050 } 7051 7052 /* 7053 * Check for a completed replacement. We always consider the first 7054 * vdev in the list to be the oldest vdev, and the last one to be 7055 * the newest (see spa_vdev_attach() for how that works). In 7056 * the case where the newest vdev is faulted, we will not automatically 7057 * remove it after a resilver completes. This is OK as it will require 7058 * user intervention to determine which disk the admin wishes to keep. 7059 */ 7060 if (vd->vdev_ops == &vdev_replacing_ops) { 7061 ASSERT(vd->vdev_children > 1); 7062 7063 newvd = vd->vdev_child[vd->vdev_children - 1]; 7064 oldvd = vd->vdev_child[0]; 7065 7066 if (vdev_dtl_empty(newvd, DTL_MISSING) && 7067 vdev_dtl_empty(newvd, DTL_OUTAGE) && 7068 !vdev_dtl_required(oldvd)) 7069 return (oldvd); 7070 } 7071 7072 /* 7073 * Check for a completed resilver with the 'unspare' flag set. 7074 * Also potentially update faulted state. 7075 */ 7076 if (vd->vdev_ops == &vdev_spare_ops) { 7077 vdev_t *first = vd->vdev_child[0]; 7078 vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; 7079 7080 if (last->vdev_unspare) { 7081 oldvd = first; 7082 newvd = last; 7083 } else if (first->vdev_unspare) { 7084 oldvd = last; 7085 newvd = first; 7086 } else { 7087 oldvd = NULL; 7088 } 7089 7090 if (oldvd != NULL && 7091 vdev_dtl_empty(newvd, DTL_MISSING) && 7092 vdev_dtl_empty(newvd, DTL_OUTAGE) && 7093 !vdev_dtl_required(oldvd)) 7094 return (oldvd); 7095 7096 vdev_propagate_state(vd); 7097 7098 /* 7099 * If there are more than two spares attached to a disk, 7100 * and those spares are not required, then we want to 7101 * attempt to free them up now so that they can be used 7102 * by other pools. Once we're back down to a single 7103 * disk+spare, we stop removing them. 7104 */ 7105 if (vd->vdev_children > 2) { 7106 newvd = vd->vdev_child[1]; 7107 7108 if (newvd->vdev_isspare && last->vdev_isspare && 7109 vdev_dtl_empty(last, DTL_MISSING) && 7110 vdev_dtl_empty(last, DTL_OUTAGE) && 7111 !vdev_dtl_required(newvd)) 7112 return (newvd); 7113 } 7114 } 7115 7116 return (NULL); 7117 } 7118 7119 static void 7120 spa_vdev_resilver_done(spa_t *spa) 7121 { 7122 vdev_t *vd, *pvd, *ppvd; 7123 uint64_t guid, sguid, pguid, ppguid; 7124 7125 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 7126 7127 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { 7128 pvd = vd->vdev_parent; 7129 ppvd = pvd->vdev_parent; 7130 guid = vd->vdev_guid; 7131 pguid = pvd->vdev_guid; 7132 ppguid = ppvd->vdev_guid; 7133 sguid = 0; 7134 /* 7135 * If we have just finished replacing a hot spared device, then 7136 * we need to detach the parent's first child (the original hot 7137 * spare) as well. 7138 */ 7139 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && 7140 ppvd->vdev_children == 2) { 7141 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); 7142 sguid = ppvd->vdev_child[1]->vdev_guid; 7143 } 7144 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd)); 7145 7146 spa_config_exit(spa, SCL_ALL, FTAG); 7147 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) 7148 return; 7149 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) 7150 return; 7151 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 7152 } 7153 7154 spa_config_exit(spa, SCL_ALL, FTAG); 7155 } 7156 7157 /* 7158 * Update the stored path or FRU for this vdev. 7159 */ 7160 int 7161 spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, 7162 boolean_t ispath) 7163 { 7164 vdev_t *vd; 7165 boolean_t sync = B_FALSE; 7166 7167 ASSERT(spa_writeable(spa)); 7168 7169 spa_vdev_state_enter(spa, SCL_ALL); 7170 7171 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 7172 return (spa_vdev_state_exit(spa, NULL, ENOENT)); 7173 7174 if (!vd->vdev_ops->vdev_op_leaf) 7175 return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 7176 7177 if (ispath) { 7178 if (strcmp(value, vd->vdev_path) != 0) { 7179 spa_strfree(vd->vdev_path); 7180 vd->vdev_path = spa_strdup(value); 7181 sync = B_TRUE; 7182 } 7183 } else { 7184 if (vd->vdev_fru == NULL) { 7185 vd->vdev_fru = spa_strdup(value); 7186 sync = B_TRUE; 7187 } else if (strcmp(value, vd->vdev_fru) != 0) { 7188 spa_strfree(vd->vdev_fru); 7189 vd->vdev_fru = spa_strdup(value); 7190 sync = B_TRUE; 7191 } 7192 } 7193 7194 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); 7195 } 7196 7197 int 7198 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) 7199 { 7200 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); 7201 } 7202 7203 int 7204 spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) 7205 { 7206 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); 7207 } 7208 7209 /* 7210 * ========================================================================== 7211 * SPA Scanning 7212 * ========================================================================== 7213 */ 7214 int 7215 spa_scrub_pause_resume(spa_t *spa, pool_scrub_cmd_t cmd) 7216 { 7217 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 7218 7219 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 7220 return (SET_ERROR(EBUSY)); 7221 7222 return (dsl_scrub_set_pause_resume(spa->spa_dsl_pool, cmd)); 7223 } 7224 7225 int 7226 spa_scan_stop(spa_t *spa) 7227 { 7228 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 7229 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 7230 return (SET_ERROR(EBUSY)); 7231 return (dsl_scan_cancel(spa->spa_dsl_pool)); 7232 } 7233 7234 int 7235 spa_scan(spa_t *spa, pool_scan_func_t func) 7236 { 7237 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 7238 7239 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) 7240 return (SET_ERROR(ENOTSUP)); 7241 7242 if (func == POOL_SCAN_RESILVER && 7243 !spa_feature_is_enabled(spa, SPA_FEATURE_RESILVER_DEFER)) 7244 return (SET_ERROR(ENOTSUP)); 7245 7246 /* 7247 * If a resilver was requested, but there is no DTL on a 7248 * writeable leaf device, we have nothing to do. 7249 */ 7250 if (func == POOL_SCAN_RESILVER && 7251 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { 7252 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); 7253 return (0); 7254 } 7255 7256 return (dsl_scan(spa->spa_dsl_pool, func)); 7257 } 7258 7259 /* 7260 * ========================================================================== 7261 * SPA async task processing 7262 * ========================================================================== 7263 */ 7264 7265 static void 7266 spa_async_remove(spa_t *spa, vdev_t *vd) 7267 { 7268 if (vd->vdev_remove_wanted) { 7269 vd->vdev_remove_wanted = B_FALSE; 7270 vd->vdev_delayed_close = B_FALSE; 7271 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); 7272 7273 /* 7274 * We want to clear the stats, but we don't want to do a full 7275 * vdev_clear() as that will cause us to throw away 7276 * degraded/faulted state as well as attempt to reopen the 7277 * device, all of which is a waste. 7278 */ 7279 vd->vdev_stat.vs_read_errors = 0; 7280 vd->vdev_stat.vs_write_errors = 0; 7281 vd->vdev_stat.vs_checksum_errors = 0; 7282 7283 vdev_state_dirty(vd->vdev_top); 7284 } 7285 7286 for (int c = 0; c < vd->vdev_children; c++) 7287 spa_async_remove(spa, vd->vdev_child[c]); 7288 } 7289 7290 static void 7291 spa_async_probe(spa_t *spa, vdev_t *vd) 7292 { 7293 if (vd->vdev_probe_wanted) { 7294 vd->vdev_probe_wanted = B_FALSE; 7295 vdev_reopen(vd); /* vdev_open() does the actual probe */ 7296 } 7297 7298 for (int c = 0; c < vd->vdev_children; c++) 7299 spa_async_probe(spa, vd->vdev_child[c]); 7300 } 7301 7302 static void 7303 spa_async_autoexpand(spa_t *spa, vdev_t *vd) 7304 { 7305 sysevent_id_t eid; 7306 nvlist_t *attr; 7307 char *physpath; 7308 7309 if (!spa->spa_autoexpand) 7310 return; 7311 7312 for (int c = 0; c < vd->vdev_children; c++) { 7313 vdev_t *cvd = vd->vdev_child[c]; 7314 spa_async_autoexpand(spa, cvd); 7315 } 7316 7317 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) 7318 return; 7319 7320 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 7321 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); 7322 7323 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0); 7324 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0); 7325 7326 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS, 7327 ESC_DEV_DLE, attr, &eid, DDI_SLEEP); 7328 7329 nvlist_free(attr); 7330 kmem_free(physpath, MAXPATHLEN); 7331 } 7332 7333 static void 7334 spa_async_thread(void *arg) 7335 { 7336 spa_t *spa = (spa_t *)arg; 7337 dsl_pool_t *dp = spa->spa_dsl_pool; 7338 int tasks; 7339 7340 ASSERT(spa->spa_sync_on); 7341 7342 mutex_enter(&spa->spa_async_lock); 7343 tasks = spa->spa_async_tasks; 7344 spa->spa_async_tasks = 0; 7345 mutex_exit(&spa->spa_async_lock); 7346 7347 /* 7348 * See if the config needs to be updated. 7349 */ 7350 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { 7351 uint64_t old_space, new_space; 7352 7353 mutex_enter(&spa_namespace_lock); 7354 old_space = metaslab_class_get_space(spa_normal_class(spa)); 7355 old_space += metaslab_class_get_space(spa_special_class(spa)); 7356 old_space += metaslab_class_get_space(spa_dedup_class(spa)); 7357 7358 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 7359 7360 new_space = metaslab_class_get_space(spa_normal_class(spa)); 7361 new_space += metaslab_class_get_space(spa_special_class(spa)); 7362 new_space += metaslab_class_get_space(spa_dedup_class(spa)); 7363 mutex_exit(&spa_namespace_lock); 7364 7365 /* 7366 * If the pool grew as a result of the config update, 7367 * then log an internal history event. 7368 */ 7369 if (new_space != old_space) { 7370 spa_history_log_internal(spa, "vdev online", NULL, 7371 "pool '%s' size: %llu(+%llu)", 7372 spa_name(spa), new_space, new_space - old_space); 7373 } 7374 } 7375 7376 /* 7377 * See if any devices need to be marked REMOVED. 7378 */ 7379 if (tasks & SPA_ASYNC_REMOVE) { 7380 spa_vdev_state_enter(spa, SCL_NONE); 7381 spa_async_remove(spa, spa->spa_root_vdev); 7382 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) 7383 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); 7384 for (int i = 0; i < spa->spa_spares.sav_count; i++) 7385 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); 7386 (void) spa_vdev_state_exit(spa, NULL, 0); 7387 } 7388 7389 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { 7390 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 7391 spa_async_autoexpand(spa, spa->spa_root_vdev); 7392 spa_config_exit(spa, SCL_CONFIG, FTAG); 7393 } 7394 7395 /* 7396 * See if any devices need to be probed. 7397 */ 7398 if (tasks & SPA_ASYNC_PROBE) { 7399 spa_vdev_state_enter(spa, SCL_NONE); 7400 spa_async_probe(spa, spa->spa_root_vdev); 7401 (void) spa_vdev_state_exit(spa, NULL, 0); 7402 } 7403 7404 /* 7405 * If any devices are done replacing, detach them. 7406 */ 7407 if (tasks & SPA_ASYNC_RESILVER_DONE) 7408 spa_vdev_resilver_done(spa); 7409 7410 /* 7411 * Kick off a resilver. 7412 */ 7413 if (tasks & SPA_ASYNC_RESILVER && 7414 (!dsl_scan_resilvering(dp) || 7415 !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_RESILVER_DEFER))) 7416 dsl_resilver_restart(dp, 0); 7417 7418 if (tasks & SPA_ASYNC_INITIALIZE_RESTART) { 7419 mutex_enter(&spa_namespace_lock); 7420 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 7421 vdev_initialize_restart(spa->spa_root_vdev); 7422 spa_config_exit(spa, SCL_CONFIG, FTAG); 7423 mutex_exit(&spa_namespace_lock); 7424 } 7425 7426 if (tasks & SPA_ASYNC_TRIM_RESTART) { 7427 mutex_enter(&spa_namespace_lock); 7428 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 7429 vdev_trim_restart(spa->spa_root_vdev); 7430 spa_config_exit(spa, SCL_CONFIG, FTAG); 7431 mutex_exit(&spa_namespace_lock); 7432 } 7433 7434 if (tasks & SPA_ASYNC_AUTOTRIM_RESTART) { 7435 mutex_enter(&spa_namespace_lock); 7436 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 7437 vdev_autotrim_restart(spa); 7438 spa_config_exit(spa, SCL_CONFIG, FTAG); 7439 mutex_exit(&spa_namespace_lock); 7440 } 7441 7442 /* 7443 * Let the world know that we're done. 7444 */ 7445 mutex_enter(&spa->spa_async_lock); 7446 spa->spa_async_thread = NULL; 7447 cv_broadcast(&spa->spa_async_cv); 7448 mutex_exit(&spa->spa_async_lock); 7449 thread_exit(); 7450 } 7451 7452 void 7453 spa_async_suspend(spa_t *spa) 7454 { 7455 mutex_enter(&spa->spa_async_lock); 7456 spa->spa_async_suspended++; 7457 while (spa->spa_async_thread != NULL) 7458 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); 7459 mutex_exit(&spa->spa_async_lock); 7460 7461 spa_vdev_remove_suspend(spa); 7462 7463 zthr_t *condense_thread = spa->spa_condense_zthr; 7464 if (condense_thread != NULL) 7465 zthr_cancel(condense_thread); 7466 7467 zthr_t *discard_thread = spa->spa_checkpoint_discard_zthr; 7468 if (discard_thread != NULL) 7469 zthr_cancel(discard_thread); 7470 } 7471 7472 void 7473 spa_async_resume(spa_t *spa) 7474 { 7475 mutex_enter(&spa->spa_async_lock); 7476 ASSERT(spa->spa_async_suspended != 0); 7477 spa->spa_async_suspended--; 7478 mutex_exit(&spa->spa_async_lock); 7479 spa_restart_removal(spa); 7480 7481 zthr_t *condense_thread = spa->spa_condense_zthr; 7482 if (condense_thread != NULL) 7483 zthr_resume(condense_thread); 7484 7485 zthr_t *discard_thread = spa->spa_checkpoint_discard_zthr; 7486 if (discard_thread != NULL) 7487 zthr_resume(discard_thread); 7488 } 7489 7490 static boolean_t 7491 spa_async_tasks_pending(spa_t *spa) 7492 { 7493 uint_t non_config_tasks; 7494 uint_t config_task; 7495 boolean_t config_task_suspended; 7496 7497 non_config_tasks = spa->spa_async_tasks & ~SPA_ASYNC_CONFIG_UPDATE; 7498 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; 7499 if (spa->spa_ccw_fail_time == 0) { 7500 config_task_suspended = B_FALSE; 7501 } else { 7502 config_task_suspended = 7503 (gethrtime() - spa->spa_ccw_fail_time) < 7504 (zfs_ccw_retry_interval * NANOSEC); 7505 } 7506 7507 return (non_config_tasks || (config_task && !config_task_suspended)); 7508 } 7509 7510 static void 7511 spa_async_dispatch(spa_t *spa) 7512 { 7513 mutex_enter(&spa->spa_async_lock); 7514 if (spa_async_tasks_pending(spa) && 7515 !spa->spa_async_suspended && 7516 spa->spa_async_thread == NULL && 7517 rootdir != NULL) 7518 spa->spa_async_thread = thread_create(NULL, 0, 7519 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); 7520 mutex_exit(&spa->spa_async_lock); 7521 } 7522 7523 void 7524 spa_async_request(spa_t *spa, int task) 7525 { 7526 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); 7527 mutex_enter(&spa->spa_async_lock); 7528 spa->spa_async_tasks |= task; 7529 mutex_exit(&spa->spa_async_lock); 7530 } 7531 7532 /* 7533 * ========================================================================== 7534 * SPA syncing routines 7535 * ========================================================================== 7536 */ 7537 7538 static int 7539 bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 7540 { 7541 bpobj_t *bpo = arg; 7542 bpobj_enqueue(bpo, bp, tx); 7543 return (0); 7544 } 7545 7546 static int 7547 spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 7548 { 7549 zio_t *zio = arg; 7550 7551 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, 7552 zio->io_flags)); 7553 return (0); 7554 } 7555 7556 /* 7557 * Note: this simple function is not inlined to make it easier to dtrace the 7558 * amount of time spent syncing frees. 7559 */ 7560 static void 7561 spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx) 7562 { 7563 zio_t *zio = zio_root(spa, NULL, NULL, 0); 7564 bplist_iterate(bpl, spa_free_sync_cb, zio, tx); 7565 VERIFY(zio_wait(zio) == 0); 7566 } 7567 7568 /* 7569 * Note: this simple function is not inlined to make it easier to dtrace the 7570 * amount of time spent syncing deferred frees. 7571 */ 7572 static void 7573 spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx) 7574 { 7575 if (spa_sync_pass(spa) != 1) 7576 return; 7577 7578 zio_t *zio = zio_root(spa, NULL, NULL, 0); 7579 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj, 7580 spa_free_sync_cb, zio, tx), ==, 0); 7581 VERIFY0(zio_wait(zio)); 7582 } 7583 7584 7585 static void 7586 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) 7587 { 7588 char *packed = NULL; 7589 size_t bufsize; 7590 size_t nvsize = 0; 7591 dmu_buf_t *db; 7592 7593 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); 7594 7595 /* 7596 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration 7597 * information. This avoids the dmu_buf_will_dirty() path and 7598 * saves us a pre-read to get data we don't actually care about. 7599 */ 7600 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); 7601 packed = kmem_alloc(bufsize, KM_SLEEP); 7602 7603 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, 7604 KM_SLEEP) == 0); 7605 bzero(packed + nvsize, bufsize - nvsize); 7606 7607 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); 7608 7609 kmem_free(packed, bufsize); 7610 7611 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 7612 dmu_buf_will_dirty(db, tx); 7613 *(uint64_t *)db->db_data = nvsize; 7614 dmu_buf_rele(db, FTAG); 7615 } 7616 7617 static void 7618 spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, 7619 const char *config, const char *entry) 7620 { 7621 nvlist_t *nvroot; 7622 nvlist_t **list; 7623 int i; 7624 7625 if (!sav->sav_sync) 7626 return; 7627 7628 /* 7629 * Update the MOS nvlist describing the list of available devices. 7630 * spa_validate_aux() will have already made sure this nvlist is 7631 * valid and the vdevs are labeled appropriately. 7632 */ 7633 if (sav->sav_object == 0) { 7634 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, 7635 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, 7636 sizeof (uint64_t), tx); 7637 VERIFY(zap_update(spa->spa_meta_objset, 7638 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, 7639 &sav->sav_object, tx) == 0); 7640 } 7641 7642 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 7643 if (sav->sav_count == 0) { 7644 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); 7645 } else { 7646 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 7647 for (i = 0; i < sav->sav_count; i++) 7648 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], 7649 B_FALSE, VDEV_CONFIG_L2CACHE); 7650 VERIFY(nvlist_add_nvlist_array(nvroot, config, list, 7651 sav->sav_count) == 0); 7652 for (i = 0; i < sav->sav_count; i++) 7653 nvlist_free(list[i]); 7654 kmem_free(list, sav->sav_count * sizeof (void *)); 7655 } 7656 7657 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); 7658 nvlist_free(nvroot); 7659 7660 sav->sav_sync = B_FALSE; 7661 } 7662 7663 /* 7664 * Rebuild spa's all-vdev ZAP from the vdev ZAPs indicated in each vdev_t. 7665 * The all-vdev ZAP must be empty. 7666 */ 7667 static void 7668 spa_avz_build(vdev_t *vd, uint64_t avz, dmu_tx_t *tx) 7669 { 7670 spa_t *spa = vd->vdev_spa; 7671 if (vd->vdev_top_zap != 0) { 7672 VERIFY0(zap_add_int(spa->spa_meta_objset, avz, 7673 vd->vdev_top_zap, tx)); 7674 } 7675 if (vd->vdev_leaf_zap != 0) { 7676 VERIFY0(zap_add_int(spa->spa_meta_objset, avz, 7677 vd->vdev_leaf_zap, tx)); 7678 } 7679 for (uint64_t i = 0; i < vd->vdev_children; i++) { 7680 spa_avz_build(vd->vdev_child[i], avz, tx); 7681 } 7682 } 7683 7684 static void 7685 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) 7686 { 7687 nvlist_t *config; 7688 7689 /* 7690 * If the pool is being imported from a pre-per-vdev-ZAP version of ZFS, 7691 * its config may not be dirty but we still need to build per-vdev ZAPs. 7692 * Similarly, if the pool is being assembled (e.g. after a split), we 7693 * need to rebuild the AVZ although the config may not be dirty. 7694 */ 7695 if (list_is_empty(&spa->spa_config_dirty_list) && 7696 spa->spa_avz_action == AVZ_ACTION_NONE) 7697 return; 7698 7699 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 7700 7701 ASSERT(spa->spa_avz_action == AVZ_ACTION_NONE || 7702 spa->spa_avz_action == AVZ_ACTION_INITIALIZE || 7703 spa->spa_all_vdev_zaps != 0); 7704 7705 if (spa->spa_avz_action == AVZ_ACTION_REBUILD) { 7706 /* Make and build the new AVZ */ 7707 uint64_t new_avz = zap_create(spa->spa_meta_objset, 7708 DMU_OTN_ZAP_METADATA, DMU_OT_NONE, 0, tx); 7709 spa_avz_build(spa->spa_root_vdev, new_avz, tx); 7710 7711 /* Diff old AVZ with new one */ 7712 zap_cursor_t zc; 7713 zap_attribute_t za; 7714 7715 for (zap_cursor_init(&zc, spa->spa_meta_objset, 7716 spa->spa_all_vdev_zaps); 7717 zap_cursor_retrieve(&zc, &za) == 0; 7718 zap_cursor_advance(&zc)) { 7719 uint64_t vdzap = za.za_first_integer; 7720 if (zap_lookup_int(spa->spa_meta_objset, new_avz, 7721 vdzap) == ENOENT) { 7722 /* 7723 * ZAP is listed in old AVZ but not in new one; 7724 * destroy it 7725 */ 7726 VERIFY0(zap_destroy(spa->spa_meta_objset, vdzap, 7727 tx)); 7728 } 7729 } 7730 7731 zap_cursor_fini(&zc); 7732 7733 /* Destroy the old AVZ */ 7734 VERIFY0(zap_destroy(spa->spa_meta_objset, 7735 spa->spa_all_vdev_zaps, tx)); 7736 7737 /* Replace the old AVZ in the dir obj with the new one */ 7738 VERIFY0(zap_update(spa->spa_meta_objset, 7739 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_VDEV_ZAP_MAP, 7740 sizeof (new_avz), 1, &new_avz, tx)); 7741 7742 spa->spa_all_vdev_zaps = new_avz; 7743 } else if (spa->spa_avz_action == AVZ_ACTION_DESTROY) { 7744 zap_cursor_t zc; 7745 zap_attribute_t za; 7746 7747 /* Walk through the AVZ and destroy all listed ZAPs */ 7748 for (zap_cursor_init(&zc, spa->spa_meta_objset, 7749 spa->spa_all_vdev_zaps); 7750 zap_cursor_retrieve(&zc, &za) == 0; 7751 zap_cursor_advance(&zc)) { 7752 uint64_t zap = za.za_first_integer; 7753 VERIFY0(zap_destroy(spa->spa_meta_objset, zap, tx)); 7754 } 7755 7756 zap_cursor_fini(&zc); 7757 7758 /* Destroy and unlink the AVZ itself */ 7759 VERIFY0(zap_destroy(spa->spa_meta_objset, 7760 spa->spa_all_vdev_zaps, tx)); 7761 VERIFY0(zap_remove(spa->spa_meta_objset, 7762 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_VDEV_ZAP_MAP, tx)); 7763 spa->spa_all_vdev_zaps = 0; 7764 } 7765 7766 if (spa->spa_all_vdev_zaps == 0) { 7767 spa->spa_all_vdev_zaps = zap_create_link(spa->spa_meta_objset, 7768 DMU_OTN_ZAP_METADATA, DMU_POOL_DIRECTORY_OBJECT, 7769 DMU_POOL_VDEV_ZAP_MAP, tx); 7770 } 7771 spa->spa_avz_action = AVZ_ACTION_NONE; 7772 7773 /* Create ZAPs for vdevs that don't have them. */ 7774 vdev_construct_zaps(spa->spa_root_vdev, tx); 7775 7776 config = spa_config_generate(spa, spa->spa_root_vdev, 7777 dmu_tx_get_txg(tx), B_FALSE); 7778 7779 /* 7780 * If we're upgrading the spa version then make sure that 7781 * the config object gets updated with the correct version. 7782 */ 7783 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version) 7784 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 7785 spa->spa_uberblock.ub_version); 7786 7787 spa_config_exit(spa, SCL_STATE, FTAG); 7788 7789 nvlist_free(spa->spa_config_syncing); 7790 spa->spa_config_syncing = config; 7791 7792 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); 7793 } 7794 7795 static void 7796 spa_sync_version(void *arg, dmu_tx_t *tx) 7797 { 7798 uint64_t *versionp = arg; 7799 uint64_t version = *versionp; 7800 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 7801 7802 /* 7803 * Setting the version is special cased when first creating the pool. 7804 */ 7805 ASSERT(tx->tx_txg != TXG_INITIAL); 7806 7807 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 7808 ASSERT(version >= spa_version(spa)); 7809 7810 spa->spa_uberblock.ub_version = version; 7811 vdev_config_dirty(spa->spa_root_vdev); 7812 spa_history_log_internal(spa, "set", tx, "version=%lld", version); 7813 } 7814 7815 /* 7816 * Set zpool properties. 7817 */ 7818 static void 7819 spa_sync_props(void *arg, dmu_tx_t *tx) 7820 { 7821 nvlist_t *nvp = arg; 7822 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 7823 objset_t *mos = spa->spa_meta_objset; 7824 nvpair_t *elem = NULL; 7825 7826 mutex_enter(&spa->spa_props_lock); 7827 7828 while ((elem = nvlist_next_nvpair(nvp, elem))) { 7829 uint64_t intval; 7830 char *strval, *fname; 7831 zpool_prop_t prop; 7832 const char *propname; 7833 zprop_type_t proptype; 7834 spa_feature_t fid; 7835 7836 switch (prop = zpool_name_to_prop(nvpair_name(elem))) { 7837 case ZPOOL_PROP_INVAL: 7838 /* 7839 * We checked this earlier in spa_prop_validate(). 7840 */ 7841 ASSERT(zpool_prop_feature(nvpair_name(elem))); 7842 7843 fname = strchr(nvpair_name(elem), '@') + 1; 7844 VERIFY0(zfeature_lookup_name(fname, &fid)); 7845 7846 spa_feature_enable(spa, fid, tx); 7847 spa_history_log_internal(spa, "set", tx, 7848 "%s=enabled", nvpair_name(elem)); 7849 break; 7850 7851 case ZPOOL_PROP_VERSION: 7852 intval = fnvpair_value_uint64(elem); 7853 /* 7854 * The version is synced seperatly before other 7855 * properties and should be correct by now. 7856 */ 7857 ASSERT3U(spa_version(spa), >=, intval); 7858 break; 7859 7860 case ZPOOL_PROP_ALTROOT: 7861 /* 7862 * 'altroot' is a non-persistent property. It should 7863 * have been set temporarily at creation or import time. 7864 */ 7865 ASSERT(spa->spa_root != NULL); 7866 break; 7867 7868 case ZPOOL_PROP_READONLY: 7869 case ZPOOL_PROP_CACHEFILE: 7870 /* 7871 * 'readonly' and 'cachefile' are also non-persisitent 7872 * properties. 7873 */ 7874 break; 7875 case ZPOOL_PROP_COMMENT: 7876 strval = fnvpair_value_string(elem); 7877 if (spa->spa_comment != NULL) 7878 spa_strfree(spa->spa_comment); 7879 spa->spa_comment = spa_strdup(strval); 7880 /* 7881 * We need to dirty the configuration on all the vdevs 7882 * so that their labels get updated. It's unnecessary 7883 * to do this for pool creation since the vdev's 7884 * configuratoin has already been dirtied. 7885 */ 7886 if (tx->tx_txg != TXG_INITIAL) 7887 vdev_config_dirty(spa->spa_root_vdev); 7888 spa_history_log_internal(spa, "set", tx, 7889 "%s=%s", nvpair_name(elem), strval); 7890 break; 7891 default: 7892 /* 7893 * Set pool property values in the poolprops mos object. 7894 */ 7895 if (spa->spa_pool_props_object == 0) { 7896 spa->spa_pool_props_object = 7897 zap_create_link(mos, DMU_OT_POOL_PROPS, 7898 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, 7899 tx); 7900 } 7901 7902 /* normalize the property name */ 7903 propname = zpool_prop_to_name(prop); 7904 proptype = zpool_prop_get_type(prop); 7905 7906 if (nvpair_type(elem) == DATA_TYPE_STRING) { 7907 ASSERT(proptype == PROP_TYPE_STRING); 7908 strval = fnvpair_value_string(elem); 7909 VERIFY0(zap_update(mos, 7910 spa->spa_pool_props_object, propname, 7911 1, strlen(strval) + 1, strval, tx)); 7912 spa_history_log_internal(spa, "set", tx, 7913 "%s=%s", nvpair_name(elem), strval); 7914 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 7915 intval = fnvpair_value_uint64(elem); 7916 7917 if (proptype == PROP_TYPE_INDEX) { 7918 const char *unused; 7919 VERIFY0(zpool_prop_index_to_string( 7920 prop, intval, &unused)); 7921 } 7922 VERIFY0(zap_update(mos, 7923 spa->spa_pool_props_object, propname, 7924 8, 1, &intval, tx)); 7925 spa_history_log_internal(spa, "set", tx, 7926 "%s=%lld", nvpair_name(elem), intval); 7927 } else { 7928 ASSERT(0); /* not allowed */ 7929 } 7930 7931 switch (prop) { 7932 case ZPOOL_PROP_DELEGATION: 7933 spa->spa_delegation = intval; 7934 break; 7935 case ZPOOL_PROP_BOOTFS: 7936 spa->spa_bootfs = intval; 7937 break; 7938 case ZPOOL_PROP_FAILUREMODE: 7939 spa->spa_failmode = intval; 7940 break; 7941 case ZPOOL_PROP_AUTOTRIM: 7942 spa->spa_autotrim = intval; 7943 spa_async_request(spa, 7944 SPA_ASYNC_AUTOTRIM_RESTART); 7945 break; 7946 case ZPOOL_PROP_AUTOEXPAND: 7947 spa->spa_autoexpand = intval; 7948 if (tx->tx_txg != TXG_INITIAL) 7949 spa_async_request(spa, 7950 SPA_ASYNC_AUTOEXPAND); 7951 break; 7952 case ZPOOL_PROP_MULTIHOST: 7953 spa->spa_multihost = intval; 7954 break; 7955 case ZPOOL_PROP_DEDUPDITTO: 7956 spa->spa_dedup_ditto = intval; 7957 break; 7958 default: 7959 break; 7960 } 7961 } 7962 7963 } 7964 7965 mutex_exit(&spa->spa_props_lock); 7966 } 7967 7968 /* 7969 * Perform one-time upgrade on-disk changes. spa_version() does not 7970 * reflect the new version this txg, so there must be no changes this 7971 * txg to anything that the upgrade code depends on after it executes. 7972 * Therefore this must be called after dsl_pool_sync() does the sync 7973 * tasks. 7974 */ 7975 static void 7976 spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) 7977 { 7978 if (spa_sync_pass(spa) != 1) 7979 return; 7980 7981 dsl_pool_t *dp = spa->spa_dsl_pool; 7982 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG); 7983 7984 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && 7985 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { 7986 dsl_pool_create_origin(dp, tx); 7987 7988 /* Keeping the origin open increases spa_minref */ 7989 spa->spa_minref += 3; 7990 } 7991 7992 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && 7993 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { 7994 dsl_pool_upgrade_clones(dp, tx); 7995 } 7996 7997 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && 7998 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { 7999 dsl_pool_upgrade_dir_clones(dp, tx); 8000 8001 /* Keeping the freedir open increases spa_minref */ 8002 spa->spa_minref += 3; 8003 } 8004 8005 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && 8006 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 8007 spa_feature_create_zap_objects(spa, tx); 8008 } 8009 8010 /* 8011 * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable 8012 * when possibility to use lz4 compression for metadata was added 8013 * Old pools that have this feature enabled must be upgraded to have 8014 * this feature active 8015 */ 8016 if (spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 8017 boolean_t lz4_en = spa_feature_is_enabled(spa, 8018 SPA_FEATURE_LZ4_COMPRESS); 8019 boolean_t lz4_ac = spa_feature_is_active(spa, 8020 SPA_FEATURE_LZ4_COMPRESS); 8021 8022 if (lz4_en && !lz4_ac) 8023 spa_feature_incr(spa, SPA_FEATURE_LZ4_COMPRESS, tx); 8024 } 8025 8026 /* 8027 * If we haven't written the salt, do so now. Note that the 8028 * feature may not be activated yet, but that's fine since 8029 * the presence of this ZAP entry is backwards compatible. 8030 */ 8031 if (zap_contains(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 8032 DMU_POOL_CHECKSUM_SALT) == ENOENT) { 8033 VERIFY0(zap_add(spa->spa_meta_objset, 8034 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CHECKSUM_SALT, 1, 8035 sizeof (spa->spa_cksum_salt.zcs_bytes), 8036 spa->spa_cksum_salt.zcs_bytes, tx)); 8037 } 8038 8039 rrw_exit(&dp->dp_config_rwlock, FTAG); 8040 } 8041 8042 static void 8043 vdev_indirect_state_sync_verify(vdev_t *vd) 8044 { 8045 vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping; 8046 vdev_indirect_births_t *vib = vd->vdev_indirect_births; 8047 8048 if (vd->vdev_ops == &vdev_indirect_ops) { 8049 ASSERT(vim != NULL); 8050 ASSERT(vib != NULL); 8051 } 8052 8053 if (vdev_obsolete_sm_object(vd) != 0) { 8054 ASSERT(vd->vdev_obsolete_sm != NULL); 8055 ASSERT(vd->vdev_removing || 8056 vd->vdev_ops == &vdev_indirect_ops); 8057 ASSERT(vdev_indirect_mapping_num_entries(vim) > 0); 8058 ASSERT(vdev_indirect_mapping_bytes_mapped(vim) > 0); 8059 8060 ASSERT3U(vdev_obsolete_sm_object(vd), ==, 8061 space_map_object(vd->vdev_obsolete_sm)); 8062 ASSERT3U(vdev_indirect_mapping_bytes_mapped(vim), >=, 8063 space_map_allocated(vd->vdev_obsolete_sm)); 8064 } 8065 ASSERT(vd->vdev_obsolete_segments != NULL); 8066 8067 /* 8068 * Since frees / remaps to an indirect vdev can only 8069 * happen in syncing context, the obsolete segments 8070 * tree must be empty when we start syncing. 8071 */ 8072 ASSERT0(range_tree_space(vd->vdev_obsolete_segments)); 8073 } 8074 8075 /* 8076 * Set the top-level vdev's max queue depth. Evaluate each top-level's 8077 * async write queue depth in case it changed. The max queue depth will 8078 * not change in the middle of syncing out this txg. 8079 */ 8080 static void 8081 spa_sync_adjust_vdev_max_queue_depth(spa_t *spa) 8082 { 8083 ASSERT(spa_writeable(spa)); 8084 8085 vdev_t *rvd = spa->spa_root_vdev; 8086 uint32_t max_queue_depth = zfs_vdev_async_write_max_active * 8087 zfs_vdev_queue_depth_pct / 100; 8088 metaslab_class_t *normal = spa_normal_class(spa); 8089 metaslab_class_t *special = spa_special_class(spa); 8090 metaslab_class_t *dedup = spa_dedup_class(spa); 8091 8092 uint64_t slots_per_allocator = 0; 8093 for (int c = 0; c < rvd->vdev_children; c++) { 8094 vdev_t *tvd = rvd->vdev_child[c]; 8095 8096 metaslab_group_t *mg = tvd->vdev_mg; 8097 if (mg == NULL || !metaslab_group_initialized(mg)) 8098 continue; 8099 8100 metaslab_class_t *mc = mg->mg_class; 8101 if (mc != normal && mc != special && mc != dedup) 8102 continue; 8103 8104 /* 8105 * It is safe to do a lock-free check here because only async 8106 * allocations look at mg_max_alloc_queue_depth, and async 8107 * allocations all happen from spa_sync(). 8108 */ 8109 for (int i = 0; i < spa->spa_alloc_count; i++) 8110 ASSERT0(zfs_refcount_count( 8111 &(mg->mg_alloc_queue_depth[i]))); 8112 mg->mg_max_alloc_queue_depth = max_queue_depth; 8113 8114 for (int i = 0; i < spa->spa_alloc_count; i++) { 8115 mg->mg_cur_max_alloc_queue_depth[i] = 8116 zfs_vdev_def_queue_depth; 8117 } 8118 slots_per_allocator += zfs_vdev_def_queue_depth; 8119 } 8120 8121 for (int i = 0; i < spa->spa_alloc_count; i++) { 8122 ASSERT0(zfs_refcount_count(&normal->mc_alloc_slots[i])); 8123 ASSERT0(zfs_refcount_count(&special->mc_alloc_slots[i])); 8124 ASSERT0(zfs_refcount_count(&dedup->mc_alloc_slots[i])); 8125 normal->mc_alloc_max_slots[i] = slots_per_allocator; 8126 special->mc_alloc_max_slots[i] = slots_per_allocator; 8127 dedup->mc_alloc_max_slots[i] = slots_per_allocator; 8128 } 8129 normal->mc_alloc_throttle_enabled = zio_dva_throttle_enabled; 8130 special->mc_alloc_throttle_enabled = zio_dva_throttle_enabled; 8131 dedup->mc_alloc_throttle_enabled = zio_dva_throttle_enabled; 8132 } 8133 8134 static void 8135 spa_sync_condense_indirect(spa_t *spa, dmu_tx_t *tx) 8136 { 8137 ASSERT(spa_writeable(spa)); 8138 8139 vdev_t *rvd = spa->spa_root_vdev; 8140 for (int c = 0; c < rvd->vdev_children; c++) { 8141 vdev_t *vd = rvd->vdev_child[c]; 8142 vdev_indirect_state_sync_verify(vd); 8143 8144 if (vdev_indirect_should_condense(vd)) { 8145 spa_condense_indirect_start_sync(vd, tx); 8146 break; 8147 } 8148 } 8149 } 8150 8151 static void 8152 spa_sync_iterate_to_convergence(spa_t *spa, dmu_tx_t *tx) 8153 { 8154 objset_t *mos = spa->spa_meta_objset; 8155 dsl_pool_t *dp = spa->spa_dsl_pool; 8156 uint64_t txg = tx->tx_txg; 8157 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; 8158 8159 do { 8160 int pass = ++spa->spa_sync_pass; 8161 8162 spa_sync_config_object(spa, tx); 8163 spa_sync_aux_dev(spa, &spa->spa_spares, tx, 8164 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); 8165 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, 8166 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); 8167 spa_errlog_sync(spa, txg); 8168 dsl_pool_sync(dp, txg); 8169 8170 if (pass < zfs_sync_pass_deferred_free) { 8171 spa_sync_frees(spa, free_bpl, tx); 8172 } else { 8173 /* 8174 * We can not defer frees in pass 1, because 8175 * we sync the deferred frees later in pass 1. 8176 */ 8177 ASSERT3U(pass, >, 1); 8178 bplist_iterate(free_bpl, bpobj_enqueue_cb, 8179 &spa->spa_deferred_bpobj, tx); 8180 } 8181 8182 ddt_sync(spa, txg); 8183 dsl_scan_sync(dp, tx); 8184 svr_sync(spa, tx); 8185 spa_sync_upgrades(spa, tx); 8186 8187 vdev_t *vd = NULL; 8188 while ((vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) 8189 != NULL) 8190 vdev_sync(vd, txg); 8191 8192 /* 8193 * Note: We need to check if the MOS is dirty because we could 8194 * have marked the MOS dirty without updating the uberblock 8195 * (e.g. if we have sync tasks but no dirty user data). We need 8196 * to check the uberblock's rootbp because it is updated if we 8197 * have synced out dirty data (though in this case the MOS will 8198 * most likely also be dirty due to second order effects, we 8199 * don't want to rely on that here). 8200 */ 8201 if (pass == 1 && 8202 spa->spa_uberblock.ub_rootbp.blk_birth < txg && 8203 !dmu_objset_is_dirty(mos, txg)) { 8204 /* 8205 * Nothing changed on the first pass, therefore this 8206 * TXG is a no-op. Avoid syncing deferred frees, so 8207 * that we can keep this TXG as a no-op. 8208 */ 8209 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 8210 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 8211 ASSERT(txg_list_empty(&dp->dp_sync_tasks, txg)); 8212 ASSERT(txg_list_empty(&dp->dp_early_sync_tasks, txg)); 8213 break; 8214 } 8215 8216 spa_sync_deferred_frees(spa, tx); 8217 } while (dmu_objset_is_dirty(mos, txg)); 8218 } 8219 8220 /* 8221 * Rewrite the vdev configuration (which includes the uberblock) to 8222 * commit the transaction group. 8223 * 8224 * If there are no dirty vdevs, we sync the uberblock to a few random 8225 * top-level vdevs that are known to be visible in the config cache 8226 * (see spa_vdev_add() for a complete description). If there *are* dirty 8227 * vdevs, sync the uberblock to all vdevs. 8228 */ 8229 static void 8230 spa_sync_rewrite_vdev_config(spa_t *spa, dmu_tx_t *tx) 8231 { 8232 vdev_t *rvd = spa->spa_root_vdev; 8233 uint64_t txg = tx->tx_txg; 8234 8235 for (;;) { 8236 int error = 0; 8237 8238 /* 8239 * We hold SCL_STATE to prevent vdev open/close/etc. 8240 * while we're attempting to write the vdev labels. 8241 */ 8242 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 8243 8244 if (list_is_empty(&spa->spa_config_dirty_list)) { 8245 vdev_t *svd[SPA_SYNC_MIN_VDEVS] = { NULL }; 8246 int svdcount = 0; 8247 int children = rvd->vdev_children; 8248 int c0 = spa_get_random(children); 8249 8250 for (int c = 0; c < children; c++) { 8251 vdev_t *vd = 8252 rvd->vdev_child[(c0 + c) % children]; 8253 8254 /* Stop when revisiting the first vdev */ 8255 if (c > 0 && svd[0] == vd) 8256 break; 8257 8258 if (vd->vdev_ms_array == 0 || 8259 vd->vdev_islog || 8260 !vdev_is_concrete(vd)) 8261 continue; 8262 8263 svd[svdcount++] = vd; 8264 if (svdcount == SPA_SYNC_MIN_VDEVS) 8265 break; 8266 } 8267 error = vdev_config_sync(svd, svdcount, txg); 8268 } else { 8269 error = vdev_config_sync(rvd->vdev_child, 8270 rvd->vdev_children, txg); 8271 } 8272 8273 if (error == 0) 8274 spa->spa_last_synced_guid = rvd->vdev_guid; 8275 8276 spa_config_exit(spa, SCL_STATE, FTAG); 8277 8278 if (error == 0) 8279 break; 8280 zio_suspend(spa, NULL, ZIO_SUSPEND_IOERR); 8281 zio_resume_wait(spa); 8282 } 8283 } 8284 8285 /* 8286 * Sync the specified transaction group. New blocks may be dirtied as 8287 * part of the process, so we iterate until it converges. 8288 */ 8289 void 8290 spa_sync(spa_t *spa, uint64_t txg) 8291 { 8292 vdev_t *vd = NULL; 8293 8294 VERIFY(spa_writeable(spa)); 8295 8296 /* 8297 * Wait for i/os issued in open context that need to complete 8298 * before this txg syncs. 8299 */ 8300 (void) zio_wait(spa->spa_txg_zio[txg & TXG_MASK]); 8301 spa->spa_txg_zio[txg & TXG_MASK] = zio_root(spa, NULL, NULL, 8302 ZIO_FLAG_CANFAIL); 8303 8304 /* 8305 * Lock out configuration changes. 8306 */ 8307 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 8308 8309 spa->spa_syncing_txg = txg; 8310 spa->spa_sync_pass = 0; 8311 8312 for (int i = 0; i < spa->spa_alloc_count; i++) { 8313 mutex_enter(&spa->spa_alloc_locks[i]); 8314 VERIFY0(avl_numnodes(&spa->spa_alloc_trees[i])); 8315 mutex_exit(&spa->spa_alloc_locks[i]); 8316 } 8317 8318 /* 8319 * If there are any pending vdev state changes, convert them 8320 * into config changes that go out with this transaction group. 8321 */ 8322 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 8323 while (list_head(&spa->spa_state_dirty_list) != NULL) { 8324 /* 8325 * We need the write lock here because, for aux vdevs, 8326 * calling vdev_config_dirty() modifies sav_config. 8327 * This is ugly and will become unnecessary when we 8328 * eliminate the aux vdev wart by integrating all vdevs 8329 * into the root vdev tree. 8330 */ 8331 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 8332 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); 8333 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { 8334 vdev_state_clean(vd); 8335 vdev_config_dirty(vd); 8336 } 8337 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 8338 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 8339 } 8340 spa_config_exit(spa, SCL_STATE, FTAG); 8341 8342 dsl_pool_t *dp = spa->spa_dsl_pool; 8343 dmu_tx_t *tx = dmu_tx_create_assigned(dp, txg); 8344 8345 spa->spa_sync_starttime = gethrtime(); 8346 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, 8347 spa->spa_sync_starttime + spa->spa_deadman_synctime)); 8348 8349 /* 8350 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, 8351 * set spa_deflate if we have no raid-z vdevs. 8352 */ 8353 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && 8354 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { 8355 vdev_t *rvd = spa->spa_root_vdev; 8356 8357 int i; 8358 for (i = 0; i < rvd->vdev_children; i++) { 8359 vd = rvd->vdev_child[i]; 8360 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) 8361 break; 8362 } 8363 if (i == rvd->vdev_children) { 8364 spa->spa_deflate = TRUE; 8365 VERIFY0(zap_add(spa->spa_meta_objset, 8366 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 8367 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); 8368 } 8369 } 8370 8371 spa_sync_adjust_vdev_max_queue_depth(spa); 8372 8373 spa_sync_condense_indirect(spa, tx); 8374 8375 spa_sync_iterate_to_convergence(spa, tx); 8376 8377 #ifdef ZFS_DEBUG 8378 if (!list_is_empty(&spa->spa_config_dirty_list)) { 8379 /* 8380 * Make sure that the number of ZAPs for all the vdevs matches 8381 * the number of ZAPs in the per-vdev ZAP list. This only gets 8382 * called if the config is dirty; otherwise there may be 8383 * outstanding AVZ operations that weren't completed in 8384 * spa_sync_config_object. 8385 */ 8386 uint64_t all_vdev_zap_entry_count; 8387 ASSERT0(zap_count(spa->spa_meta_objset, 8388 spa->spa_all_vdev_zaps, &all_vdev_zap_entry_count)); 8389 ASSERT3U(vdev_count_verify_zaps(spa->spa_root_vdev), ==, 8390 all_vdev_zap_entry_count); 8391 } 8392 #endif 8393 8394 if (spa->spa_vdev_removal != NULL) { 8395 ASSERT0(spa->spa_vdev_removal->svr_bytes_done[txg & TXG_MASK]); 8396 } 8397 8398 spa_sync_rewrite_vdev_config(spa, tx); 8399 dmu_tx_commit(tx); 8400 8401 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 8402 8403 /* 8404 * Clear the dirty config list. 8405 */ 8406 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) 8407 vdev_config_clean(vd); 8408 8409 /* 8410 * Now that the new config has synced transactionally, 8411 * let it become visible to the config cache. 8412 */ 8413 if (spa->spa_config_syncing != NULL) { 8414 spa_config_set(spa, spa->spa_config_syncing); 8415 spa->spa_config_txg = txg; 8416 spa->spa_config_syncing = NULL; 8417 } 8418 8419 dsl_pool_sync_done(dp, txg); 8420 8421 for (int i = 0; i < spa->spa_alloc_count; i++) { 8422 mutex_enter(&spa->spa_alloc_locks[i]); 8423 VERIFY0(avl_numnodes(&spa->spa_alloc_trees[i])); 8424 mutex_exit(&spa->spa_alloc_locks[i]); 8425 } 8426 8427 /* 8428 * Update usable space statistics. 8429 */ 8430 while ((vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) 8431 != NULL) 8432 vdev_sync_done(vd, txg); 8433 8434 spa_update_dspace(spa); 8435 8436 /* 8437 * It had better be the case that we didn't dirty anything 8438 * since vdev_config_sync(). 8439 */ 8440 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 8441 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 8442 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); 8443 8444 while (zfs_pause_spa_sync) 8445 delay(1); 8446 8447 spa->spa_sync_pass = 0; 8448 8449 /* 8450 * Update the last synced uberblock here. We want to do this at 8451 * the end of spa_sync() so that consumers of spa_last_synced_txg() 8452 * will be guaranteed that all the processing associated with 8453 * that txg has been completed. 8454 */ 8455 spa->spa_ubsync = spa->spa_uberblock; 8456 spa_config_exit(spa, SCL_CONFIG, FTAG); 8457 8458 spa_handle_ignored_writes(spa); 8459 8460 /* 8461 * If any async tasks have been requested, kick them off. 8462 */ 8463 spa_async_dispatch(spa); 8464 } 8465 8466 /* 8467 * Sync all pools. We don't want to hold the namespace lock across these 8468 * operations, so we take a reference on the spa_t and drop the lock during the 8469 * sync. 8470 */ 8471 void 8472 spa_sync_allpools(void) 8473 { 8474 spa_t *spa = NULL; 8475 mutex_enter(&spa_namespace_lock); 8476 while ((spa = spa_next(spa)) != NULL) { 8477 if (spa_state(spa) != POOL_STATE_ACTIVE || 8478 !spa_writeable(spa) || spa_suspended(spa)) 8479 continue; 8480 spa_open_ref(spa, FTAG); 8481 mutex_exit(&spa_namespace_lock); 8482 txg_wait_synced(spa_get_dsl(spa), 0); 8483 mutex_enter(&spa_namespace_lock); 8484 spa_close(spa, FTAG); 8485 } 8486 mutex_exit(&spa_namespace_lock); 8487 } 8488 8489 /* 8490 * ========================================================================== 8491 * Miscellaneous routines 8492 * ========================================================================== 8493 */ 8494 8495 /* 8496 * Remove all pools in the system. 8497 */ 8498 void 8499 spa_evict_all(void) 8500 { 8501 spa_t *spa; 8502 8503 /* 8504 * Remove all cached state. All pools should be closed now, 8505 * so every spa in the AVL tree should be unreferenced. 8506 */ 8507 mutex_enter(&spa_namespace_lock); 8508 while ((spa = spa_next(NULL)) != NULL) { 8509 /* 8510 * Stop async tasks. The async thread may need to detach 8511 * a device that's been replaced, which requires grabbing 8512 * spa_namespace_lock, so we must drop it here. 8513 */ 8514 spa_open_ref(spa, FTAG); 8515 mutex_exit(&spa_namespace_lock); 8516 spa_async_suspend(spa); 8517 mutex_enter(&spa_namespace_lock); 8518 spa_close(spa, FTAG); 8519 8520 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 8521 spa_unload(spa); 8522 spa_deactivate(spa); 8523 } 8524 spa_remove(spa); 8525 } 8526 mutex_exit(&spa_namespace_lock); 8527 } 8528 8529 vdev_t * 8530 spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) 8531 { 8532 vdev_t *vd; 8533 int i; 8534 8535 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) 8536 return (vd); 8537 8538 if (aux) { 8539 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 8540 vd = spa->spa_l2cache.sav_vdevs[i]; 8541 if (vd->vdev_guid == guid) 8542 return (vd); 8543 } 8544 8545 for (i = 0; i < spa->spa_spares.sav_count; i++) { 8546 vd = spa->spa_spares.sav_vdevs[i]; 8547 if (vd->vdev_guid == guid) 8548 return (vd); 8549 } 8550 } 8551 8552 return (NULL); 8553 } 8554 8555 void 8556 spa_upgrade(spa_t *spa, uint64_t version) 8557 { 8558 ASSERT(spa_writeable(spa)); 8559 8560 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 8561 8562 /* 8563 * This should only be called for a non-faulted pool, and since a 8564 * future version would result in an unopenable pool, this shouldn't be 8565 * possible. 8566 */ 8567 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); 8568 ASSERT3U(version, >=, spa->spa_uberblock.ub_version); 8569 8570 spa->spa_uberblock.ub_version = version; 8571 vdev_config_dirty(spa->spa_root_vdev); 8572 8573 spa_config_exit(spa, SCL_ALL, FTAG); 8574 8575 txg_wait_synced(spa_get_dsl(spa), 0); 8576 } 8577 8578 boolean_t 8579 spa_has_spare(spa_t *spa, uint64_t guid) 8580 { 8581 int i; 8582 uint64_t spareguid; 8583 spa_aux_vdev_t *sav = &spa->spa_spares; 8584 8585 for (i = 0; i < sav->sav_count; i++) 8586 if (sav->sav_vdevs[i]->vdev_guid == guid) 8587 return (B_TRUE); 8588 8589 for (i = 0; i < sav->sav_npending; i++) { 8590 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, 8591 &spareguid) == 0 && spareguid == guid) 8592 return (B_TRUE); 8593 } 8594 8595 return (B_FALSE); 8596 } 8597 8598 /* 8599 * Check if a pool has an active shared spare device. 8600 * Note: reference count of an active spare is 2, as a spare and as a replace 8601 */ 8602 static boolean_t 8603 spa_has_active_shared_spare(spa_t *spa) 8604 { 8605 int i, refcnt; 8606 uint64_t pool; 8607 spa_aux_vdev_t *sav = &spa->spa_spares; 8608 8609 for (i = 0; i < sav->sav_count; i++) { 8610 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, 8611 &refcnt) && pool != 0ULL && pool == spa_guid(spa) && 8612 refcnt > 2) 8613 return (B_TRUE); 8614 } 8615 8616 return (B_FALSE); 8617 } 8618 8619 sysevent_t * 8620 spa_event_create(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl, const char *name) 8621 { 8622 sysevent_t *ev = NULL; 8623 #ifdef _KERNEL 8624 sysevent_attr_list_t *attr = NULL; 8625 sysevent_value_t value; 8626 8627 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", 8628 SE_SLEEP); 8629 ASSERT(ev != NULL); 8630 8631 value.value_type = SE_DATA_TYPE_STRING; 8632 value.value.sv_string = spa_name(spa); 8633 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) 8634 goto done; 8635 8636 value.value_type = SE_DATA_TYPE_UINT64; 8637 value.value.sv_uint64 = spa_guid(spa); 8638 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) 8639 goto done; 8640 8641 if (vd) { 8642 value.value_type = SE_DATA_TYPE_UINT64; 8643 value.value.sv_uint64 = vd->vdev_guid; 8644 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, 8645 SE_SLEEP) != 0) 8646 goto done; 8647 8648 if (vd->vdev_path) { 8649 value.value_type = SE_DATA_TYPE_STRING; 8650 value.value.sv_string = vd->vdev_path; 8651 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, 8652 &value, SE_SLEEP) != 0) 8653 goto done; 8654 } 8655 } 8656 8657 if (hist_nvl != NULL) { 8658 fnvlist_merge((nvlist_t *)attr, hist_nvl); 8659 } 8660 8661 if (sysevent_attach_attributes(ev, attr) != 0) 8662 goto done; 8663 attr = NULL; 8664 8665 done: 8666 if (attr) 8667 sysevent_free_attr(attr); 8668 8669 #endif 8670 return (ev); 8671 } 8672 8673 void 8674 spa_event_post(sysevent_t *ev) 8675 { 8676 #ifdef _KERNEL 8677 sysevent_id_t eid; 8678 8679 (void) log_sysevent(ev, SE_SLEEP, &eid); 8680 sysevent_free(ev); 8681 #endif 8682 } 8683 8684 void 8685 spa_event_discard(sysevent_t *ev) 8686 { 8687 #ifdef _KERNEL 8688 sysevent_free(ev); 8689 #endif 8690 } 8691 8692 /* 8693 * Post a sysevent corresponding to the given event. The 'name' must be one of 8694 * the event definitions in sys/sysevent/eventdefs.h. The payload will be 8695 * filled in from the spa and (optionally) the vdev and history nvl. This 8696 * doesn't do anything in the userland libzpool, as we don't want consumers to 8697 * misinterpret ztest or zdb as real changes. 8698 */ 8699 void 8700 spa_event_notify(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl, const char *name) 8701 { 8702 spa_event_post(spa_event_create(spa, vd, hist_nvl, name)); 8703 } 8704