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 (c) 2017, 2019, Datto Inc. All rights reserved. 31 * Copyright 2019 Joyent, Inc. 32 * Copyright (c) 2017, Intel Corporation. 33 * Copyright 2020 Joshua M. Clulow <josh@sysmgr.org> 34 * Copyright 2021 OmniOS Community Edition (OmniOSce) Association. 35 * Copyright 2022 Oxide Computer Company 36 * Copyright 2023 MNX Cloud, Inc. 37 */ 38 39 /* 40 * SPA: Storage Pool Allocator 41 * 42 * This file contains all the routines used when modifying on-disk SPA state. 43 * This includes opening, importing, destroying, exporting a pool, and syncing a 44 * pool. 45 */ 46 47 #include <sys/zfs_context.h> 48 #include <sys/fm/fs/zfs.h> 49 #include <sys/spa_impl.h> 50 #include <sys/zio.h> 51 #include <sys/zio_checksum.h> 52 #include <sys/dmu.h> 53 #include <sys/dmu_tx.h> 54 #include <sys/zap.h> 55 #include <sys/zil.h> 56 #include <sys/ddt.h> 57 #include <sys/vdev_impl.h> 58 #include <sys/vdev_removal.h> 59 #include <sys/vdev_indirect_mapping.h> 60 #include <sys/vdev_indirect_births.h> 61 #include <sys/vdev_initialize.h> 62 #include <sys/vdev_trim.h> 63 #include <sys/metaslab.h> 64 #include <sys/metaslab_impl.h> 65 #include <sys/mmp.h> 66 #include <sys/uberblock_impl.h> 67 #include <sys/txg.h> 68 #include <sys/avl.h> 69 #include <sys/bpobj.h> 70 #include <sys/dmu_traverse.h> 71 #include <sys/dmu_objset.h> 72 #include <sys/unique.h> 73 #include <sys/dsl_pool.h> 74 #include <sys/dsl_dataset.h> 75 #include <sys/dsl_dir.h> 76 #include <sys/dsl_prop.h> 77 #include <sys/dsl_synctask.h> 78 #include <sys/fs/zfs.h> 79 #include <sys/arc.h> 80 #include <sys/callb.h> 81 #include <sys/systeminfo.h> 82 #include <sys/spa_boot.h> 83 #include <sys/zfs_ioctl.h> 84 #include <sys/dsl_scan.h> 85 #include <sys/zfeature.h> 86 #include <sys/dsl_destroy.h> 87 #include <sys/abd.h> 88 89 #ifdef _KERNEL 90 #include <sys/bootprops.h> 91 #include <sys/callb.h> 92 #include <sys/cpupart.h> 93 #include <sys/pool.h> 94 #include <sys/sysdc.h> 95 #include <sys/zone.h> 96 #endif /* _KERNEL */ 97 98 #include "zfs_prop.h" 99 #include "zfs_comutil.h" 100 101 /* 102 * The interval, in seconds, at which failed configuration cache file writes 103 * should be retried. 104 */ 105 int zfs_ccw_retry_interval = 300; 106 107 typedef enum zti_modes { 108 ZTI_MODE_FIXED, /* value is # of threads (min 1) */ 109 ZTI_MODE_BATCH, /* cpu-intensive; value is ignored */ 110 ZTI_MODE_NULL, /* don't create a taskq */ 111 ZTI_NMODES 112 } zti_modes_t; 113 114 #define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) } 115 #define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 } 116 #define ZTI_NULL { ZTI_MODE_NULL, 0, 0 } 117 118 #define ZTI_N(n) ZTI_P(n, 1) 119 #define ZTI_ONE ZTI_N(1) 120 121 typedef struct zio_taskq_info { 122 zti_modes_t zti_mode; 123 uint_t zti_value; 124 uint_t zti_count; 125 } zio_taskq_info_t; 126 127 static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = { 128 "issue", "issue_high", "intr", "intr_high" 129 }; 130 131 /* 132 * This table defines the taskq settings for each ZFS I/O type. When 133 * initializing a pool, we use this table to create an appropriately sized 134 * taskq. Some operations are low volume and therefore have a small, static 135 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE 136 * macros. Other operations process a large amount of data; the ZTI_BATCH 137 * macro causes us to create a taskq oriented for throughput. Some operations 138 * are so high frequency and short-lived that the taskq itself can become a 139 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an 140 * additional degree of parallelism specified by the number of threads per- 141 * taskq and the number of taskqs; when dispatching an event in this case, the 142 * particular taskq is chosen at random. 143 * 144 * The different taskq priorities are to handle the different contexts (issue 145 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that 146 * need to be handled with minimum delay. 147 */ 148 const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = { 149 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */ 150 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* NULL */ 151 { ZTI_N(8), ZTI_NULL, ZTI_P(12, 8), ZTI_NULL }, /* READ */ 152 { ZTI_BATCH, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */ 153 { ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */ 154 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */ 155 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */ 156 { ZTI_N(4), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* TRIM */ 157 }; 158 159 static void spa_sync_version(void *arg, dmu_tx_t *tx); 160 static void spa_sync_props(void *arg, dmu_tx_t *tx); 161 static boolean_t spa_has_active_shared_spare(spa_t *spa); 162 static int spa_load_impl(spa_t *spa, spa_import_type_t type, char **ereport); 163 static void spa_vdev_resilver_done(spa_t *spa); 164 165 uint_t zio_taskq_batch_pct = 75; /* 1 thread per cpu in pset */ 166 id_t zio_taskq_psrset_bind = PS_NONE; 167 boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */ 168 uint_t zio_taskq_basedc = 80; /* base duty cycle */ 169 170 boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */ 171 extern int zfs_sync_pass_deferred_free; 172 173 /* 174 * Report any spa_load_verify errors found, but do not fail spa_load. 175 * This is used by zdb to analyze non-idle pools. 176 */ 177 boolean_t spa_load_verify_dryrun = B_FALSE; 178 179 /* 180 * This (illegal) pool name is used when temporarily importing a spa_t in order 181 * to get the vdev stats associated with the imported devices. 182 */ 183 #define TRYIMPORT_NAME "$import" 184 185 /* 186 * For debugging purposes: print out vdev tree during pool import. 187 */ 188 boolean_t spa_load_print_vdev_tree = B_FALSE; 189 190 /* 191 * A non-zero value for zfs_max_missing_tvds means that we allow importing 192 * pools with missing top-level vdevs. This is strictly intended for advanced 193 * pool recovery cases since missing data is almost inevitable. Pools with 194 * missing devices can only be imported read-only for safety reasons, and their 195 * fail-mode will be automatically set to "continue". 196 * 197 * With 1 missing vdev we should be able to import the pool and mount all 198 * datasets. User data that was not modified after the missing device has been 199 * added should be recoverable. This means that snapshots created prior to the 200 * addition of that device should be completely intact. 201 * 202 * With 2 missing vdevs, some datasets may fail to mount since there are 203 * dataset statistics that are stored as regular metadata. Some data might be 204 * recoverable if those vdevs were added recently. 205 * 206 * With 3 or more missing vdevs, the pool is severely damaged and MOS entries 207 * may be missing entirely. Chances of data recovery are very low. Note that 208 * there are also risks of performing an inadvertent rewind as we might be 209 * missing all the vdevs with the latest uberblocks. 210 */ 211 uint64_t zfs_max_missing_tvds = 0; 212 213 /* 214 * The parameters below are similar to zfs_max_missing_tvds but are only 215 * intended for a preliminary open of the pool with an untrusted config which 216 * might be incomplete or out-dated. 217 * 218 * We are more tolerant for pools opened from a cachefile since we could have 219 * an out-dated cachefile where a device removal was not registered. 220 * We could have set the limit arbitrarily high but in the case where devices 221 * are really missing we would want to return the proper error codes; we chose 222 * SPA_DVAS_PER_BP - 1 so that some copies of the MOS would still be available 223 * and we get a chance to retrieve the trusted config. 224 */ 225 uint64_t zfs_max_missing_tvds_cachefile = SPA_DVAS_PER_BP - 1; 226 227 /* 228 * In the case where config was assembled by scanning device paths (/dev/dsks 229 * by default) we are less tolerant since all the existing devices should have 230 * been detected and we want spa_load to return the right error codes. 231 */ 232 uint64_t zfs_max_missing_tvds_scan = 0; 233 234 /* 235 * Interval in seconds at which to poll spare vdevs for health. 236 * Setting this to zero disables spare polling. 237 * Set to three hours by default. 238 */ 239 uint_t spa_spare_poll_interval_seconds = 60 * 60 * 3; 240 241 /* 242 * Debugging aid that pauses spa_sync() towards the end. 243 */ 244 boolean_t zfs_pause_spa_sync = B_FALSE; 245 246 /* 247 * ========================================================================== 248 * SPA properties routines 249 * ========================================================================== 250 */ 251 252 /* 253 * Add a (source=src, propname=propval) list to an nvlist. 254 */ 255 static void 256 spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, 257 uint64_t intval, zprop_source_t src) 258 { 259 const char *propname = zpool_prop_to_name(prop); 260 nvlist_t *propval; 261 262 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); 263 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); 264 265 if (strval != NULL) 266 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0); 267 else 268 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0); 269 270 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0); 271 nvlist_free(propval); 272 } 273 274 /* 275 * Get property values from the spa configuration. 276 */ 277 static void 278 spa_prop_get_config(spa_t *spa, nvlist_t **nvp) 279 { 280 vdev_t *rvd = spa->spa_root_vdev; 281 dsl_pool_t *pool = spa->spa_dsl_pool; 282 uint64_t size, alloc, cap, version; 283 zprop_source_t src = ZPROP_SRC_NONE; 284 spa_config_dirent_t *dp; 285 metaslab_class_t *mc = spa_normal_class(spa); 286 287 ASSERT(MUTEX_HELD(&spa->spa_props_lock)); 288 289 if (rvd != NULL) { 290 alloc = metaslab_class_get_alloc(mc); 291 alloc += metaslab_class_get_alloc(spa_special_class(spa)); 292 alloc += metaslab_class_get_alloc(spa_dedup_class(spa)); 293 294 size = metaslab_class_get_space(mc); 295 size += metaslab_class_get_space(spa_special_class(spa)); 296 size += metaslab_class_get_space(spa_dedup_class(spa)); 297 298 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src); 299 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src); 300 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src); 301 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL, 302 size - alloc, src); 303 spa_prop_add_list(*nvp, ZPOOL_PROP_CHECKPOINT, NULL, 304 spa->spa_checkpoint_info.sci_dspace, src); 305 306 spa_prop_add_list(*nvp, ZPOOL_PROP_FRAGMENTATION, NULL, 307 metaslab_class_fragmentation(mc), src); 308 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, 309 metaslab_class_expandable_space(mc), src); 310 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, 311 (spa_mode(spa) == FREAD), src); 312 313 cap = (size == 0) ? 0 : (alloc * 100 / size); 314 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src); 315 316 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL, 317 ddt_get_pool_dedup_ratio(spa), src); 318 319 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, 320 rvd->vdev_state, src); 321 322 version = spa_version(spa); 323 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION)) 324 src = ZPROP_SRC_DEFAULT; 325 else 326 src = ZPROP_SRC_LOCAL; 327 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src); 328 } 329 330 if (pool != NULL) { 331 /* 332 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS, 333 * when opening pools before this version freedir will be NULL. 334 */ 335 if (pool->dp_free_dir != NULL) { 336 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL, 337 dsl_dir_phys(pool->dp_free_dir)->dd_used_bytes, 338 src); 339 } else { 340 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, 341 NULL, 0, src); 342 } 343 344 if (pool->dp_leak_dir != NULL) { 345 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, NULL, 346 dsl_dir_phys(pool->dp_leak_dir)->dd_used_bytes, 347 src); 348 } else { 349 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, 350 NULL, 0, src); 351 } 352 } 353 354 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); 355 356 if (spa->spa_comment != NULL) { 357 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment, 358 0, ZPROP_SRC_LOCAL); 359 } 360 361 if (spa->spa_root != NULL) 362 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, 363 0, ZPROP_SRC_LOCAL); 364 365 if (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_BLOCKS)) { 366 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL, 367 MIN(zfs_max_recordsize, SPA_MAXBLOCKSIZE), ZPROP_SRC_NONE); 368 } else { 369 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL, 370 SPA_OLD_MAXBLOCKSIZE, ZPROP_SRC_NONE); 371 } 372 373 if (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_DNODE)) { 374 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXDNODESIZE, NULL, 375 DNODE_MAX_SIZE, ZPROP_SRC_NONE); 376 } else { 377 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXDNODESIZE, NULL, 378 DNODE_MIN_SIZE, ZPROP_SRC_NONE); 379 } 380 381 if ((dp = list_head(&spa->spa_config_list)) != NULL) { 382 if (dp->scd_path == NULL) { 383 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 384 "none", 0, ZPROP_SRC_LOCAL); 385 } else if (strcmp(dp->scd_path, spa_config_path) != 0) { 386 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 387 dp->scd_path, 0, ZPROP_SRC_LOCAL); 388 } 389 } 390 } 391 392 /* 393 * Get zpool property values. 394 */ 395 int 396 spa_prop_get(spa_t *spa, nvlist_t **nvp) 397 { 398 objset_t *mos = spa->spa_meta_objset; 399 zap_cursor_t zc; 400 zap_attribute_t za; 401 int err; 402 403 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); 404 405 mutex_enter(&spa->spa_props_lock); 406 407 /* 408 * Get properties from the spa config. 409 */ 410 spa_prop_get_config(spa, nvp); 411 412 /* If no pool property object, no more prop to get. */ 413 if (mos == NULL || spa->spa_pool_props_object == 0) { 414 mutex_exit(&spa->spa_props_lock); 415 return (0); 416 } 417 418 /* 419 * Get properties from the MOS pool property object. 420 */ 421 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); 422 (err = zap_cursor_retrieve(&zc, &za)) == 0; 423 zap_cursor_advance(&zc)) { 424 uint64_t intval = 0; 425 char *strval = NULL; 426 zprop_source_t src = ZPROP_SRC_DEFAULT; 427 zpool_prop_t prop; 428 429 if ((prop = zpool_name_to_prop(za.za_name)) == ZPOOL_PROP_INVAL) 430 continue; 431 432 switch (za.za_integer_length) { 433 case 8: 434 /* integer property */ 435 if (za.za_first_integer != 436 zpool_prop_default_numeric(prop)) 437 src = ZPROP_SRC_LOCAL; 438 439 if (prop == ZPOOL_PROP_BOOTFS) { 440 dsl_pool_t *dp; 441 dsl_dataset_t *ds = NULL; 442 443 dp = spa_get_dsl(spa); 444 dsl_pool_config_enter(dp, FTAG); 445 err = dsl_dataset_hold_obj(dp, 446 za.za_first_integer, FTAG, &ds); 447 if (err != 0) { 448 dsl_pool_config_exit(dp, FTAG); 449 break; 450 } 451 452 strval = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, 453 KM_SLEEP); 454 dsl_dataset_name(ds, strval); 455 dsl_dataset_rele(ds, FTAG); 456 dsl_pool_config_exit(dp, FTAG); 457 } else { 458 strval = NULL; 459 intval = za.za_first_integer; 460 } 461 462 spa_prop_add_list(*nvp, prop, strval, intval, src); 463 464 if (strval != NULL) 465 kmem_free(strval, ZFS_MAX_DATASET_NAME_LEN); 466 467 break; 468 469 case 1: 470 /* string property */ 471 strval = kmem_alloc(za.za_num_integers, KM_SLEEP); 472 err = zap_lookup(mos, spa->spa_pool_props_object, 473 za.za_name, 1, za.za_num_integers, strval); 474 if (err) { 475 kmem_free(strval, za.za_num_integers); 476 break; 477 } 478 spa_prop_add_list(*nvp, prop, strval, 0, src); 479 kmem_free(strval, za.za_num_integers); 480 break; 481 482 default: 483 break; 484 } 485 } 486 zap_cursor_fini(&zc); 487 mutex_exit(&spa->spa_props_lock); 488 out: 489 if (err && err != ENOENT) { 490 nvlist_free(*nvp); 491 *nvp = NULL; 492 return (err); 493 } 494 495 return (0); 496 } 497 498 /* 499 * Validate the given pool properties nvlist and modify the list 500 * for the property values to be set. 501 */ 502 static int 503 spa_prop_validate(spa_t *spa, nvlist_t *props) 504 { 505 nvpair_t *elem; 506 int error = 0, reset_bootfs = 0; 507 uint64_t objnum = 0; 508 boolean_t has_feature = B_FALSE; 509 510 elem = NULL; 511 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 512 uint64_t intval; 513 char *strval, *slash, *check, *fname; 514 const char *propname = nvpair_name(elem); 515 zpool_prop_t prop = zpool_name_to_prop(propname); 516 517 switch (prop) { 518 case ZPOOL_PROP_INVAL: 519 if (!zpool_prop_feature(propname)) { 520 error = SET_ERROR(EINVAL); 521 break; 522 } 523 524 /* 525 * Sanitize the input. 526 */ 527 if (nvpair_type(elem) != DATA_TYPE_UINT64) { 528 error = SET_ERROR(EINVAL); 529 break; 530 } 531 532 if (nvpair_value_uint64(elem, &intval) != 0) { 533 error = SET_ERROR(EINVAL); 534 break; 535 } 536 537 if (intval != 0) { 538 error = SET_ERROR(EINVAL); 539 break; 540 } 541 542 fname = strchr(propname, '@') + 1; 543 if (zfeature_lookup_name(fname, NULL) != 0) { 544 error = SET_ERROR(EINVAL); 545 break; 546 } 547 548 has_feature = B_TRUE; 549 break; 550 551 case ZPOOL_PROP_VERSION: 552 error = nvpair_value_uint64(elem, &intval); 553 if (!error && 554 (intval < spa_version(spa) || 555 intval > SPA_VERSION_BEFORE_FEATURES || 556 has_feature)) 557 error = SET_ERROR(EINVAL); 558 break; 559 560 case ZPOOL_PROP_DELEGATION: 561 case ZPOOL_PROP_AUTOREPLACE: 562 case ZPOOL_PROP_LISTSNAPS: 563 case ZPOOL_PROP_AUTOEXPAND: 564 case ZPOOL_PROP_AUTOTRIM: 565 error = nvpair_value_uint64(elem, &intval); 566 if (!error && intval > 1) 567 error = SET_ERROR(EINVAL); 568 break; 569 570 case ZPOOL_PROP_MULTIHOST: 571 error = nvpair_value_uint64(elem, &intval); 572 if (!error && intval > 1) 573 error = SET_ERROR(EINVAL); 574 575 if (!error && !spa_get_hostid()) 576 error = SET_ERROR(ENOTSUP); 577 578 break; 579 580 case ZPOOL_PROP_BOOTFS: 581 /* 582 * If the pool version is less than SPA_VERSION_BOOTFS, 583 * or the pool is still being created (version == 0), 584 * the bootfs property cannot be set. 585 */ 586 if (spa_version(spa) < SPA_VERSION_BOOTFS) { 587 error = SET_ERROR(ENOTSUP); 588 break; 589 } 590 591 /* 592 * Make sure the vdev config is bootable 593 */ 594 if (!vdev_is_bootable(spa->spa_root_vdev)) { 595 error = SET_ERROR(ENOTSUP); 596 break; 597 } 598 599 reset_bootfs = 1; 600 601 error = nvpair_value_string(elem, &strval); 602 603 if (!error) { 604 objset_t *os; 605 uint64_t propval; 606 607 if (strval == NULL || strval[0] == '\0') { 608 objnum = zpool_prop_default_numeric( 609 ZPOOL_PROP_BOOTFS); 610 break; 611 } 612 613 error = dmu_objset_hold(strval, FTAG, &os); 614 if (error != 0) 615 break; 616 617 /* 618 * Must be ZPL, and its property settings 619 * must be supported. 620 */ 621 622 if (dmu_objset_type(os) != DMU_OST_ZFS) { 623 error = SET_ERROR(ENOTSUP); 624 } else if ((error = 625 dsl_prop_get_int_ds(dmu_objset_ds(os), 626 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 627 &propval)) == 0 && 628 !BOOTFS_COMPRESS_VALID(propval)) { 629 error = SET_ERROR(ENOTSUP); 630 } else { 631 objnum = dmu_objset_id(os); 632 } 633 dmu_objset_rele(os, FTAG); 634 } 635 break; 636 637 case ZPOOL_PROP_FAILUREMODE: 638 error = nvpair_value_uint64(elem, &intval); 639 if (!error && (intval < ZIO_FAILURE_MODE_WAIT || 640 intval > ZIO_FAILURE_MODE_PANIC)) 641 error = SET_ERROR(EINVAL); 642 643 /* 644 * This is a special case which only occurs when 645 * the pool has completely failed. This allows 646 * the user to change the in-core failmode property 647 * without syncing it out to disk (I/Os might 648 * currently be blocked). We do this by returning 649 * EIO to the caller (spa_prop_set) to trick it 650 * into thinking we encountered a property validation 651 * error. 652 */ 653 if (!error && spa_suspended(spa)) { 654 spa->spa_failmode = intval; 655 error = SET_ERROR(EIO); 656 } 657 break; 658 659 case ZPOOL_PROP_CACHEFILE: 660 if ((error = nvpair_value_string(elem, &strval)) != 0) 661 break; 662 663 if (strval[0] == '\0') 664 break; 665 666 if (strcmp(strval, "none") == 0) 667 break; 668 669 if (strval[0] != '/') { 670 error = SET_ERROR(EINVAL); 671 break; 672 } 673 674 slash = strrchr(strval, '/'); 675 ASSERT(slash != NULL); 676 677 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || 678 strcmp(slash, "/..") == 0) 679 error = SET_ERROR(EINVAL); 680 break; 681 682 case ZPOOL_PROP_COMMENT: 683 if ((error = nvpair_value_string(elem, &strval)) != 0) 684 break; 685 for (check = strval; *check != '\0'; check++) { 686 /* 687 * The kernel doesn't have an easy isprint() 688 * check. For this kernel check, we merely 689 * check ASCII apart from DEL. Fix this if 690 * there is an easy-to-use kernel isprint(). 691 */ 692 if (*check >= 0x7f) { 693 error = SET_ERROR(EINVAL); 694 break; 695 } 696 } 697 if (strlen(strval) > ZPROP_MAX_COMMENT) 698 error = E2BIG; 699 break; 700 701 case ZPOOL_PROP_DEDUPDITTO: 702 if (spa_version(spa) < SPA_VERSION_DEDUP) 703 error = SET_ERROR(ENOTSUP); 704 else 705 error = nvpair_value_uint64(elem, &intval); 706 if (error == 0 && 707 intval != 0 && intval < ZIO_DEDUPDITTO_MIN) 708 error = SET_ERROR(EINVAL); 709 break; 710 } 711 712 if (error) 713 break; 714 } 715 716 if (!error && reset_bootfs) { 717 error = nvlist_remove(props, 718 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); 719 720 if (!error) { 721 error = nvlist_add_uint64(props, 722 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); 723 } 724 } 725 726 return (error); 727 } 728 729 void 730 spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) 731 { 732 char *cachefile; 733 spa_config_dirent_t *dp; 734 735 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), 736 &cachefile) != 0) 737 return; 738 739 dp = kmem_alloc(sizeof (spa_config_dirent_t), 740 KM_SLEEP); 741 742 if (cachefile[0] == '\0') 743 dp->scd_path = spa_strdup(spa_config_path); 744 else if (strcmp(cachefile, "none") == 0) 745 dp->scd_path = NULL; 746 else 747 dp->scd_path = spa_strdup(cachefile); 748 749 list_insert_head(&spa->spa_config_list, dp); 750 if (need_sync) 751 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 752 } 753 754 int 755 spa_prop_set(spa_t *spa, nvlist_t *nvp) 756 { 757 int error; 758 nvpair_t *elem = NULL; 759 boolean_t need_sync = B_FALSE; 760 761 if ((error = spa_prop_validate(spa, nvp)) != 0) 762 return (error); 763 764 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { 765 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem)); 766 767 if (prop == ZPOOL_PROP_CACHEFILE || 768 prop == ZPOOL_PROP_ALTROOT || 769 prop == ZPOOL_PROP_READONLY) 770 continue; 771 772 if (prop == ZPOOL_PROP_VERSION || prop == ZPOOL_PROP_INVAL) { 773 uint64_t ver; 774 775 if (prop == ZPOOL_PROP_VERSION) { 776 VERIFY(nvpair_value_uint64(elem, &ver) == 0); 777 } else { 778 ASSERT(zpool_prop_feature(nvpair_name(elem))); 779 ver = SPA_VERSION_FEATURES; 780 need_sync = B_TRUE; 781 } 782 783 /* Save time if the version is already set. */ 784 if (ver == spa_version(spa)) 785 continue; 786 787 /* 788 * In addition to the pool directory object, we might 789 * create the pool properties object, the features for 790 * read object, the features for write object, or the 791 * feature descriptions object. 792 */ 793 error = dsl_sync_task(spa->spa_name, NULL, 794 spa_sync_version, &ver, 795 6, ZFS_SPACE_CHECK_RESERVED); 796 if (error) 797 return (error); 798 continue; 799 } 800 801 need_sync = B_TRUE; 802 break; 803 } 804 805 if (need_sync) { 806 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props, 807 nvp, 6, ZFS_SPACE_CHECK_RESERVED)); 808 } 809 810 return (0); 811 } 812 813 /* 814 * If the bootfs property value is dsobj, clear it. 815 */ 816 void 817 spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) 818 { 819 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { 820 VERIFY(zap_remove(spa->spa_meta_objset, 821 spa->spa_pool_props_object, 822 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); 823 spa->spa_bootfs = 0; 824 } 825 } 826 827 /*ARGSUSED*/ 828 static int 829 spa_change_guid_check(void *arg, dmu_tx_t *tx) 830 { 831 uint64_t *newguid = arg; 832 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 833 vdev_t *rvd = spa->spa_root_vdev; 834 uint64_t vdev_state; 835 836 if (spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT)) { 837 int error = (spa_has_checkpoint(spa)) ? 838 ZFS_ERR_CHECKPOINT_EXISTS : ZFS_ERR_DISCARDING_CHECKPOINT; 839 return (SET_ERROR(error)); 840 } 841 842 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 843 vdev_state = rvd->vdev_state; 844 spa_config_exit(spa, SCL_STATE, FTAG); 845 846 if (vdev_state != VDEV_STATE_HEALTHY) 847 return (SET_ERROR(ENXIO)); 848 849 ASSERT3U(spa_guid(spa), !=, *newguid); 850 851 return (0); 852 } 853 854 static void 855 spa_change_guid_sync(void *arg, dmu_tx_t *tx) 856 { 857 uint64_t *newguid = arg; 858 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 859 uint64_t oldguid; 860 vdev_t *rvd = spa->spa_root_vdev; 861 862 oldguid = spa_guid(spa); 863 864 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 865 rvd->vdev_guid = *newguid; 866 rvd->vdev_guid_sum += (*newguid - oldguid); 867 vdev_config_dirty(rvd); 868 spa_config_exit(spa, SCL_STATE, FTAG); 869 870 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu", 871 oldguid, *newguid); 872 } 873 874 /* 875 * Change the GUID for the pool. This is done so that we can later 876 * re-import a pool built from a clone of our own vdevs. We will modify 877 * the root vdev's guid, our own pool guid, and then mark all of our 878 * vdevs dirty. Note that we must make sure that all our vdevs are 879 * online when we do this, or else any vdevs that weren't present 880 * would be orphaned from our pool. We are also going to issue a 881 * sysevent to update any watchers. 882 */ 883 int 884 spa_change_guid(spa_t *spa) 885 { 886 int error; 887 uint64_t guid; 888 889 mutex_enter(&spa->spa_vdev_top_lock); 890 mutex_enter(&spa_namespace_lock); 891 guid = spa_generate_guid(NULL); 892 893 error = dsl_sync_task(spa->spa_name, spa_change_guid_check, 894 spa_change_guid_sync, &guid, 5, ZFS_SPACE_CHECK_RESERVED); 895 896 if (error == 0) { 897 spa_write_cachefile(spa, B_FALSE, B_TRUE); 898 spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_REGUID); 899 } 900 901 mutex_exit(&spa_namespace_lock); 902 mutex_exit(&spa->spa_vdev_top_lock); 903 904 return (error); 905 } 906 907 /* 908 * ========================================================================== 909 * SPA state manipulation (open/create/destroy/import/export) 910 * ========================================================================== 911 */ 912 913 static int 914 spa_error_entry_compare(const void *a, const void *b) 915 { 916 const spa_error_entry_t *sa = (const spa_error_entry_t *)a; 917 const spa_error_entry_t *sb = (const spa_error_entry_t *)b; 918 int ret; 919 920 ret = memcmp(&sa->se_bookmark, &sb->se_bookmark, 921 sizeof (zbookmark_phys_t)); 922 923 return (TREE_ISIGN(ret)); 924 } 925 926 /* 927 * Utility function which retrieves copies of the current logs and 928 * re-initializes them in the process. 929 */ 930 void 931 spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) 932 { 933 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); 934 935 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); 936 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); 937 938 avl_create(&spa->spa_errlist_scrub, 939 spa_error_entry_compare, sizeof (spa_error_entry_t), 940 offsetof(spa_error_entry_t, se_avl)); 941 avl_create(&spa->spa_errlist_last, 942 spa_error_entry_compare, sizeof (spa_error_entry_t), 943 offsetof(spa_error_entry_t, se_avl)); 944 } 945 946 static void 947 spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 948 { 949 const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; 950 enum zti_modes mode = ztip->zti_mode; 951 uint_t value = ztip->zti_value; 952 uint_t count = ztip->zti_count; 953 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 954 char name[32]; 955 uint_t flags = 0; 956 boolean_t batch = B_FALSE; 957 958 if (mode == ZTI_MODE_NULL) { 959 tqs->stqs_count = 0; 960 tqs->stqs_taskq = NULL; 961 return; 962 } 963 964 ASSERT3U(count, >, 0); 965 966 tqs->stqs_count = count; 967 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP); 968 969 switch (mode) { 970 case ZTI_MODE_FIXED: 971 ASSERT3U(value, >=, 1); 972 value = MAX(value, 1); 973 break; 974 975 case ZTI_MODE_BATCH: 976 batch = B_TRUE; 977 flags |= TASKQ_THREADS_CPU_PCT; 978 value = zio_taskq_batch_pct; 979 break; 980 981 default: 982 panic("unrecognized mode for %s_%s taskq (%u:%u) in " 983 "spa_activate()", 984 zio_type_name[t], zio_taskq_types[q], mode, value); 985 break; 986 } 987 988 for (uint_t i = 0; i < count; i++) { 989 taskq_t *tq; 990 991 if (count > 1) { 992 (void) snprintf(name, sizeof (name), "%s_%s_%u", 993 zio_type_name[t], zio_taskq_types[q], i); 994 } else { 995 (void) snprintf(name, sizeof (name), "%s_%s", 996 zio_type_name[t], zio_taskq_types[q]); 997 } 998 999 if (zio_taskq_sysdc && spa->spa_proc != &p0) { 1000 if (batch) 1001 flags |= TASKQ_DC_BATCH; 1002 1003 tq = taskq_create_sysdc(name, value, 50, INT_MAX, 1004 spa->spa_proc, zio_taskq_basedc, flags); 1005 } else { 1006 pri_t pri = maxclsyspri; 1007 /* 1008 * The write issue taskq can be extremely CPU 1009 * intensive. Run it at slightly lower priority 1010 * than the other taskqs. 1011 */ 1012 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE) 1013 pri--; 1014 1015 tq = taskq_create_proc(name, value, pri, 50, 1016 INT_MAX, spa->spa_proc, flags); 1017 } 1018 1019 tqs->stqs_taskq[i] = tq; 1020 } 1021 } 1022 1023 static void 1024 spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 1025 { 1026 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 1027 1028 if (tqs->stqs_taskq == NULL) { 1029 ASSERT0(tqs->stqs_count); 1030 return; 1031 } 1032 1033 for (uint_t i = 0; i < tqs->stqs_count; i++) { 1034 ASSERT3P(tqs->stqs_taskq[i], !=, NULL); 1035 taskq_destroy(tqs->stqs_taskq[i]); 1036 } 1037 1038 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *)); 1039 tqs->stqs_taskq = NULL; 1040 } 1041 1042 /* 1043 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority. 1044 * Note that a type may have multiple discrete taskqs to avoid lock contention 1045 * on the taskq itself. In that case we choose which taskq at random by using 1046 * the low bits of gethrtime(). 1047 */ 1048 void 1049 spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 1050 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent) 1051 { 1052 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 1053 taskq_t *tq; 1054 1055 ASSERT3P(tqs->stqs_taskq, !=, NULL); 1056 ASSERT3U(tqs->stqs_count, !=, 0); 1057 1058 if (tqs->stqs_count == 1) { 1059 tq = tqs->stqs_taskq[0]; 1060 } else { 1061 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; 1062 } 1063 1064 taskq_dispatch_ent(tq, func, arg, flags, ent); 1065 } 1066 1067 static void 1068 spa_create_zio_taskqs(spa_t *spa) 1069 { 1070 for (int t = 0; t < ZIO_TYPES; t++) { 1071 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1072 spa_taskqs_init(spa, t, q); 1073 } 1074 } 1075 } 1076 1077 #ifdef _KERNEL 1078 static void 1079 spa_thread(void *arg) 1080 { 1081 callb_cpr_t cprinfo; 1082 spa_t *spa = arg; 1083 char spa_id_readable[CB_MAXNAME + 1]; 1084 user_t *pu = PTOU(curproc); 1085 1086 (void) snprintf(spa_id_readable, sizeof (spa_id_readable), "SPA:0x%p", 1087 spa); 1088 1089 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 1090 spa_id_readable); 1091 1092 ASSERT(curproc != &p0); 1093 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 1094 "zpool-%s", spa->spa_name); 1095 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 1096 1097 /* bind this thread to the requested psrset */ 1098 if (zio_taskq_psrset_bind != PS_NONE) { 1099 pool_lock(); 1100 mutex_enter(&cpu_lock); 1101 mutex_enter(&pidlock); 1102 mutex_enter(&curproc->p_lock); 1103 1104 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 1105 0, NULL, NULL) == 0) { 1106 curthread->t_bind_pset = zio_taskq_psrset_bind; 1107 } else { 1108 cmn_err(CE_WARN, 1109 "Couldn't bind process for zfs pool \"%s\" to " 1110 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 1111 } 1112 1113 mutex_exit(&curproc->p_lock); 1114 mutex_exit(&pidlock); 1115 mutex_exit(&cpu_lock); 1116 pool_unlock(); 1117 } 1118 1119 if (zio_taskq_sysdc) { 1120 sysdc_thread_enter(curthread, 100, 0); 1121 } 1122 1123 spa->spa_proc = curproc; 1124 spa->spa_did = curthread->t_did; 1125 1126 spa_create_zio_taskqs(spa); 1127 1128 mutex_enter(&spa->spa_proc_lock); 1129 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 1130 1131 spa->spa_proc_state = SPA_PROC_ACTIVE; 1132 cv_broadcast(&spa->spa_proc_cv); 1133 1134 CALLB_CPR_SAFE_BEGIN(&cprinfo); 1135 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 1136 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1137 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 1138 1139 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 1140 spa->spa_proc_state = SPA_PROC_GONE; 1141 spa->spa_proc = &p0; 1142 cv_broadcast(&spa->spa_proc_cv); 1143 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 1144 1145 mutex_enter(&curproc->p_lock); 1146 lwp_exit(); 1147 } 1148 #endif 1149 1150 /* 1151 * Activate an uninitialized pool. 1152 */ 1153 static void 1154 spa_activate(spa_t *spa, int mode) 1155 { 1156 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 1157 1158 spa->spa_state = POOL_STATE_ACTIVE; 1159 spa->spa_mode = mode; 1160 1161 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 1162 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 1163 spa->spa_special_class = metaslab_class_create(spa, zfs_metaslab_ops); 1164 spa->spa_dedup_class = metaslab_class_create(spa, zfs_metaslab_ops); 1165 1166 /* Try to create a covering process */ 1167 mutex_enter(&spa->spa_proc_lock); 1168 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 1169 ASSERT(spa->spa_proc == &p0); 1170 spa->spa_did = 0; 1171 1172 /* Only create a process if we're going to be around a while. */ 1173 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 1174 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 1175 NULL, 0) == 0) { 1176 spa->spa_proc_state = SPA_PROC_CREATED; 1177 while (spa->spa_proc_state == SPA_PROC_CREATED) { 1178 cv_wait(&spa->spa_proc_cv, 1179 &spa->spa_proc_lock); 1180 } 1181 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1182 ASSERT(spa->spa_proc != &p0); 1183 ASSERT(spa->spa_did != 0); 1184 } else { 1185 #ifdef _KERNEL 1186 cmn_err(CE_WARN, 1187 "Couldn't create process for zfs pool \"%s\"\n", 1188 spa->spa_name); 1189 #endif 1190 } 1191 } 1192 mutex_exit(&spa->spa_proc_lock); 1193 1194 /* If we didn't create a process, we need to create our taskqs. */ 1195 if (spa->spa_proc == &p0) { 1196 spa_create_zio_taskqs(spa); 1197 } 1198 1199 for (size_t i = 0; i < TXG_SIZE; i++) { 1200 spa->spa_txg_zio[i] = zio_root(spa, NULL, NULL, 1201 ZIO_FLAG_CANFAIL); 1202 } 1203 1204 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 1205 offsetof(vdev_t, vdev_config_dirty_node)); 1206 list_create(&spa->spa_evicting_os_list, sizeof (objset_t), 1207 offsetof(objset_t, os_evicting_node)); 1208 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 1209 offsetof(vdev_t, vdev_state_dirty_node)); 1210 1211 txg_list_create(&spa->spa_vdev_txg_list, spa, 1212 offsetof(struct vdev, vdev_txg_node)); 1213 1214 avl_create(&spa->spa_errlist_scrub, 1215 spa_error_entry_compare, sizeof (spa_error_entry_t), 1216 offsetof(spa_error_entry_t, se_avl)); 1217 avl_create(&spa->spa_errlist_last, 1218 spa_error_entry_compare, sizeof (spa_error_entry_t), 1219 offsetof(spa_error_entry_t, se_avl)); 1220 1221 spa_keystore_init(&spa->spa_keystore); 1222 1223 /* 1224 * The taskq to upgrade datasets in this pool. Currently used by 1225 * feature SPA_FEATURE_USEROBJ_ACCOUNTING/SPA_FEATURE_PROJECT_QUOTA. 1226 */ 1227 spa->spa_upgrade_taskq = taskq_create("z_upgrade", boot_ncpus, 1228 minclsyspri, 1, INT_MAX, TASKQ_DYNAMIC); 1229 } 1230 1231 /* 1232 * Opposite of spa_activate(). 1233 */ 1234 static void 1235 spa_deactivate(spa_t *spa) 1236 { 1237 ASSERT(spa->spa_sync_on == B_FALSE); 1238 ASSERT(spa->spa_dsl_pool == NULL); 1239 ASSERT(spa->spa_root_vdev == NULL); 1240 ASSERT(spa->spa_async_zio_root == NULL); 1241 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 1242 1243 spa_evicting_os_wait(spa); 1244 1245 if (spa->spa_upgrade_taskq) { 1246 taskq_destroy(spa->spa_upgrade_taskq); 1247 spa->spa_upgrade_taskq = NULL; 1248 } 1249 1250 txg_list_destroy(&spa->spa_vdev_txg_list); 1251 1252 list_destroy(&spa->spa_config_dirty_list); 1253 list_destroy(&spa->spa_evicting_os_list); 1254 list_destroy(&spa->spa_state_dirty_list); 1255 1256 for (int t = 0; t < ZIO_TYPES; t++) { 1257 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1258 spa_taskqs_fini(spa, t, q); 1259 } 1260 } 1261 1262 for (size_t i = 0; i < TXG_SIZE; i++) { 1263 ASSERT3P(spa->spa_txg_zio[i], !=, NULL); 1264 VERIFY0(zio_wait(spa->spa_txg_zio[i])); 1265 spa->spa_txg_zio[i] = NULL; 1266 } 1267 1268 metaslab_class_destroy(spa->spa_normal_class); 1269 spa->spa_normal_class = NULL; 1270 1271 metaslab_class_destroy(spa->spa_log_class); 1272 spa->spa_log_class = NULL; 1273 1274 metaslab_class_destroy(spa->spa_special_class); 1275 spa->spa_special_class = NULL; 1276 1277 metaslab_class_destroy(spa->spa_dedup_class); 1278 spa->spa_dedup_class = NULL; 1279 1280 /* 1281 * If this was part of an import or the open otherwise failed, we may 1282 * still have errors left in the queues. Empty them just in case. 1283 */ 1284 spa_errlog_drain(spa); 1285 avl_destroy(&spa->spa_errlist_scrub); 1286 avl_destroy(&spa->spa_errlist_last); 1287 1288 spa_keystore_fini(&spa->spa_keystore); 1289 1290 spa->spa_state = POOL_STATE_UNINITIALIZED; 1291 1292 mutex_enter(&spa->spa_proc_lock); 1293 if (spa->spa_proc_state != SPA_PROC_NONE) { 1294 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1295 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1296 cv_broadcast(&spa->spa_proc_cv); 1297 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1298 ASSERT(spa->spa_proc != &p0); 1299 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1300 } 1301 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1302 spa->spa_proc_state = SPA_PROC_NONE; 1303 } 1304 ASSERT(spa->spa_proc == &p0); 1305 mutex_exit(&spa->spa_proc_lock); 1306 1307 /* 1308 * We want to make sure spa_thread() has actually exited the ZFS 1309 * module, so that the module can't be unloaded out from underneath 1310 * it. 1311 */ 1312 if (spa->spa_did != 0) { 1313 thread_join(spa->spa_did); 1314 spa->spa_did = 0; 1315 } 1316 } 1317 1318 /* 1319 * Verify a pool configuration, and construct the vdev tree appropriately. This 1320 * will create all the necessary vdevs in the appropriate layout, with each vdev 1321 * in the CLOSED state. This will prep the pool before open/creation/import. 1322 * All vdev validation is done by the vdev_alloc() routine. 1323 */ 1324 static int 1325 spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1326 uint_t id, int atype) 1327 { 1328 nvlist_t **child; 1329 uint_t children; 1330 int error; 1331 1332 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1333 return (error); 1334 1335 if ((*vdp)->vdev_ops->vdev_op_leaf) 1336 return (0); 1337 1338 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1339 &child, &children); 1340 1341 if (error == ENOENT) 1342 return (0); 1343 1344 if (error) { 1345 vdev_free(*vdp); 1346 *vdp = NULL; 1347 return (SET_ERROR(EINVAL)); 1348 } 1349 1350 for (int c = 0; c < children; c++) { 1351 vdev_t *vd; 1352 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1353 atype)) != 0) { 1354 vdev_free(*vdp); 1355 *vdp = NULL; 1356 return (error); 1357 } 1358 } 1359 1360 ASSERT(*vdp != NULL); 1361 1362 return (0); 1363 } 1364 1365 static boolean_t 1366 spa_should_flush_logs_on_unload(spa_t *spa) 1367 { 1368 if (!spa_feature_is_active(spa, SPA_FEATURE_LOG_SPACEMAP)) 1369 return (B_FALSE); 1370 1371 if (!spa_writeable(spa)) 1372 return (B_FALSE); 1373 1374 if (!spa->spa_sync_on) 1375 return (B_FALSE); 1376 1377 if (spa_state(spa) != POOL_STATE_EXPORTED) 1378 return (B_FALSE); 1379 1380 if (zfs_keep_log_spacemaps_at_export) 1381 return (B_FALSE); 1382 1383 return (B_TRUE); 1384 } 1385 1386 /* 1387 * Opens a transaction that will set the flag that will instruct 1388 * spa_sync to attempt to flush all the metaslabs for that txg. 1389 */ 1390 static void 1391 spa_unload_log_sm_flush_all(spa_t *spa) 1392 { 1393 dmu_tx_t *tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 1394 1395 VERIFY0(dmu_tx_assign(tx, TXG_WAIT)); 1396 1397 ASSERT3U(spa->spa_log_flushall_txg, ==, 0); 1398 spa->spa_log_flushall_txg = dmu_tx_get_txg(tx); 1399 1400 dmu_tx_commit(tx); 1401 txg_wait_synced(spa_get_dsl(spa), spa->spa_log_flushall_txg); 1402 } 1403 1404 static void 1405 spa_unload_log_sm_metadata(spa_t *spa) 1406 { 1407 void *cookie = NULL; 1408 spa_log_sm_t *sls; 1409 1410 while ((sls = avl_destroy_nodes(&spa->spa_sm_logs_by_txg, 1411 &cookie)) != NULL) { 1412 VERIFY0(sls->sls_mscount); 1413 kmem_free(sls, sizeof (spa_log_sm_t)); 1414 } 1415 1416 for (log_summary_entry_t *e = list_head(&spa->spa_log_summary); 1417 e != NULL; e = list_head(&spa->spa_log_summary)) { 1418 VERIFY0(e->lse_mscount); 1419 list_remove(&spa->spa_log_summary, e); 1420 kmem_free(e, sizeof (log_summary_entry_t)); 1421 } 1422 1423 spa->spa_unflushed_stats.sus_nblocks = 0; 1424 spa->spa_unflushed_stats.sus_memused = 0; 1425 spa->spa_unflushed_stats.sus_blocklimit = 0; 1426 } 1427 1428 /* 1429 * Opposite of spa_load(). 1430 */ 1431 static void 1432 spa_unload(spa_t *spa) 1433 { 1434 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1435 ASSERT(spa_state(spa) != POOL_STATE_UNINITIALIZED); 1436 1437 spa_import_progress_remove(spa); 1438 spa_load_note(spa, "UNLOADING"); 1439 1440 /* 1441 * If the log space map feature is enabled and the pool is getting 1442 * exported (but not destroyed), we want to spend some time flushing 1443 * as many metaslabs as we can in an attempt to destroy log space 1444 * maps and save import time. 1445 */ 1446 if (spa_should_flush_logs_on_unload(spa)) 1447 spa_unload_log_sm_flush_all(spa); 1448 1449 /* 1450 * Stop async tasks. 1451 */ 1452 spa_async_suspend(spa); 1453 1454 if (spa->spa_root_vdev) { 1455 vdev_t *root_vdev = spa->spa_root_vdev; 1456 vdev_initialize_stop_all(root_vdev, VDEV_INITIALIZE_ACTIVE); 1457 vdev_trim_stop_all(root_vdev, VDEV_TRIM_ACTIVE); 1458 vdev_autotrim_stop_all(spa); 1459 } 1460 1461 /* 1462 * Stop syncing. 1463 */ 1464 if (spa->spa_sync_on) { 1465 txg_sync_stop(spa->spa_dsl_pool); 1466 spa->spa_sync_on = B_FALSE; 1467 } 1468 1469 /* 1470 * This ensures that there is no async metaslab prefetching 1471 * while we attempt to unload the spa. 1472 */ 1473 if (spa->spa_root_vdev != NULL) { 1474 for (int c = 0; c < spa->spa_root_vdev->vdev_children; c++) { 1475 vdev_t *vc = spa->spa_root_vdev->vdev_child[c]; 1476 if (vc->vdev_mg != NULL) 1477 taskq_wait(vc->vdev_mg->mg_taskq); 1478 } 1479 } 1480 1481 if (spa->spa_mmp.mmp_thread) 1482 mmp_thread_stop(spa); 1483 1484 /* 1485 * Wait for any outstanding async I/O to complete. 1486 */ 1487 if (spa->spa_async_zio_root != NULL) { 1488 for (int i = 0; i < max_ncpus; i++) 1489 (void) zio_wait(spa->spa_async_zio_root[i]); 1490 kmem_free(spa->spa_async_zio_root, max_ncpus * sizeof (void *)); 1491 spa->spa_async_zio_root = NULL; 1492 } 1493 1494 if (spa->spa_vdev_removal != NULL) { 1495 spa_vdev_removal_destroy(spa->spa_vdev_removal); 1496 spa->spa_vdev_removal = NULL; 1497 } 1498 1499 if (spa->spa_condense_zthr != NULL) { 1500 zthr_destroy(spa->spa_condense_zthr); 1501 spa->spa_condense_zthr = NULL; 1502 } 1503 1504 if (spa->spa_checkpoint_discard_zthr != NULL) { 1505 zthr_destroy(spa->spa_checkpoint_discard_zthr); 1506 spa->spa_checkpoint_discard_zthr = NULL; 1507 } 1508 1509 spa_condense_fini(spa); 1510 1511 bpobj_close(&spa->spa_deferred_bpobj); 1512 1513 spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); 1514 1515 /* 1516 * Close all vdevs. 1517 */ 1518 if (spa->spa_root_vdev) 1519 vdev_free(spa->spa_root_vdev); 1520 ASSERT(spa->spa_root_vdev == NULL); 1521 1522 /* 1523 * Close the dsl pool. 1524 */ 1525 if (spa->spa_dsl_pool) { 1526 dsl_pool_close(spa->spa_dsl_pool); 1527 spa->spa_dsl_pool = NULL; 1528 spa->spa_meta_objset = NULL; 1529 } 1530 1531 ddt_unload(spa); 1532 spa_unload_log_sm_metadata(spa); 1533 1534 /* 1535 * Drop and purge level 2 cache 1536 */ 1537 spa_l2cache_drop(spa); 1538 1539 for (int i = 0; i < spa->spa_spares.sav_count; i++) 1540 vdev_free(spa->spa_spares.sav_vdevs[i]); 1541 if (spa->spa_spares.sav_vdevs) { 1542 kmem_free(spa->spa_spares.sav_vdevs, 1543 spa->spa_spares.sav_count * sizeof (void *)); 1544 spa->spa_spares.sav_vdevs = NULL; 1545 } 1546 if (spa->spa_spares.sav_config) { 1547 nvlist_free(spa->spa_spares.sav_config); 1548 spa->spa_spares.sav_config = NULL; 1549 } 1550 spa->spa_spares.sav_count = 0; 1551 1552 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) { 1553 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1554 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1555 } 1556 if (spa->spa_l2cache.sav_vdevs) { 1557 kmem_free(spa->spa_l2cache.sav_vdevs, 1558 spa->spa_l2cache.sav_count * sizeof (void *)); 1559 spa->spa_l2cache.sav_vdevs = NULL; 1560 } 1561 if (spa->spa_l2cache.sav_config) { 1562 nvlist_free(spa->spa_l2cache.sav_config); 1563 spa->spa_l2cache.sav_config = NULL; 1564 } 1565 spa->spa_l2cache.sav_count = 0; 1566 1567 spa->spa_async_suspended = 0; 1568 1569 spa->spa_indirect_vdevs_loaded = B_FALSE; 1570 1571 if (spa->spa_comment != NULL) { 1572 spa_strfree(spa->spa_comment); 1573 spa->spa_comment = NULL; 1574 } 1575 1576 spa_config_exit(spa, SCL_ALL, spa); 1577 } 1578 1579 /* 1580 * Load (or re-load) the current list of vdevs describing the active spares for 1581 * this pool. When this is called, we have some form of basic information in 1582 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1583 * then re-generate a more complete list including status information. 1584 */ 1585 void 1586 spa_load_spares(spa_t *spa) 1587 { 1588 nvlist_t **spares; 1589 uint_t nspares; 1590 int i; 1591 vdev_t *vd, *tvd; 1592 1593 #ifndef _KERNEL 1594 /* 1595 * zdb opens both the current state of the pool and the 1596 * checkpointed state (if present), with a different spa_t. 1597 * 1598 * As spare vdevs are shared among open pools, we skip loading 1599 * them when we load the checkpointed state of the pool. 1600 */ 1601 if (!spa_writeable(spa)) 1602 return; 1603 #endif 1604 1605 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1606 1607 /* 1608 * First, close and free any existing spare vdevs. 1609 */ 1610 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1611 vd = spa->spa_spares.sav_vdevs[i]; 1612 1613 /* Undo the call to spa_activate() below */ 1614 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1615 B_FALSE)) != NULL && tvd->vdev_isspare) 1616 spa_spare_remove(tvd); 1617 vdev_close(vd); 1618 vdev_free(vd); 1619 } 1620 1621 if (spa->spa_spares.sav_vdevs) 1622 kmem_free(spa->spa_spares.sav_vdevs, 1623 spa->spa_spares.sav_count * sizeof (void *)); 1624 1625 if (spa->spa_spares.sav_config == NULL) 1626 nspares = 0; 1627 else 1628 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1629 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1630 1631 spa->spa_spares.sav_count = (int)nspares; 1632 spa->spa_spares.sav_vdevs = NULL; 1633 1634 if (nspares == 0) 1635 return; 1636 1637 /* 1638 * Construct the array of vdevs, opening them to get status in the 1639 * process. For each spare, there is potentially two different vdev_t 1640 * structures associated with it: one in the list of spares (used only 1641 * for basic validation purposes) and one in the active vdev 1642 * configuration (if it's spared in). During this phase we open and 1643 * validate each vdev on the spare list. If the vdev also exists in the 1644 * active configuration, then we also mark this vdev as an active spare. 1645 */ 1646 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1647 KM_SLEEP); 1648 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1649 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1650 VDEV_ALLOC_SPARE) == 0); 1651 ASSERT(vd != NULL); 1652 1653 spa->spa_spares.sav_vdevs[i] = vd; 1654 1655 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1656 B_FALSE)) != NULL) { 1657 if (!tvd->vdev_isspare) 1658 spa_spare_add(tvd); 1659 1660 /* 1661 * We only mark the spare active if we were successfully 1662 * able to load the vdev. Otherwise, importing a pool 1663 * with a bad active spare would result in strange 1664 * behavior, because multiple pool would think the spare 1665 * is actively in use. 1666 * 1667 * There is a vulnerability here to an equally bizarre 1668 * circumstance, where a dead active spare is later 1669 * brought back to life (onlined or otherwise). Given 1670 * the rarity of this scenario, and the extra complexity 1671 * it adds, we ignore the possibility. 1672 */ 1673 if (!vdev_is_dead(tvd)) 1674 spa_spare_activate(tvd); 1675 } 1676 1677 vd->vdev_top = vd; 1678 vd->vdev_aux = &spa->spa_spares; 1679 1680 if (vdev_open(vd) != 0) 1681 continue; 1682 1683 if (vdev_validate_aux(vd) == 0) 1684 spa_spare_add(vd); 1685 } 1686 1687 /* 1688 * Recompute the stashed list of spares, with status information 1689 * this time. 1690 */ 1691 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1692 DATA_TYPE_NVLIST_ARRAY) == 0); 1693 1694 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1695 KM_SLEEP); 1696 for (i = 0; i < spa->spa_spares.sav_count; i++) 1697 spares[i] = vdev_config_generate(spa, 1698 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1699 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1700 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1701 for (i = 0; i < spa->spa_spares.sav_count; i++) 1702 nvlist_free(spares[i]); 1703 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1704 } 1705 1706 /* 1707 * Load (or re-load) the current list of vdevs describing the active l2cache for 1708 * this pool. When this is called, we have some form of basic information in 1709 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1710 * then re-generate a more complete list including status information. 1711 * Devices which are already active have their details maintained, and are 1712 * not re-opened. 1713 */ 1714 void 1715 spa_load_l2cache(spa_t *spa) 1716 { 1717 nvlist_t **l2cache; 1718 uint_t nl2cache; 1719 int i, j, oldnvdevs; 1720 uint64_t guid; 1721 vdev_t *vd, **oldvdevs, **newvdevs; 1722 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1723 1724 #ifndef _KERNEL 1725 /* 1726 * zdb opens both the current state of the pool and the 1727 * checkpointed state (if present), with a different spa_t. 1728 * 1729 * As L2 caches are part of the ARC which is shared among open 1730 * pools, we skip loading them when we load the checkpointed 1731 * state of the pool. 1732 */ 1733 if (!spa_writeable(spa)) 1734 return; 1735 #endif 1736 1737 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1738 1739 nl2cache = 0; 1740 newvdevs = NULL; 1741 if (sav->sav_config != NULL) { 1742 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1743 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1744 if (nl2cache > 0) { 1745 newvdevs = kmem_alloc( 1746 nl2cache * sizeof (void *), KM_SLEEP); 1747 } 1748 } 1749 1750 oldvdevs = sav->sav_vdevs; 1751 oldnvdevs = sav->sav_count; 1752 sav->sav_vdevs = NULL; 1753 sav->sav_count = 0; 1754 1755 /* 1756 * Process new nvlist of vdevs. 1757 */ 1758 for (i = 0; i < nl2cache; i++) { 1759 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1760 &guid) == 0); 1761 1762 newvdevs[i] = NULL; 1763 for (j = 0; j < oldnvdevs; j++) { 1764 vd = oldvdevs[j]; 1765 if (vd != NULL && guid == vd->vdev_guid) { 1766 /* 1767 * Retain previous vdev for add/remove ops. 1768 */ 1769 newvdevs[i] = vd; 1770 oldvdevs[j] = NULL; 1771 break; 1772 } 1773 } 1774 1775 if (newvdevs[i] == NULL) { 1776 /* 1777 * Create new vdev 1778 */ 1779 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1780 VDEV_ALLOC_L2CACHE) == 0); 1781 ASSERT(vd != NULL); 1782 newvdevs[i] = vd; 1783 1784 /* 1785 * Commit this vdev as an l2cache device, 1786 * even if it fails to open. 1787 */ 1788 spa_l2cache_add(vd); 1789 1790 vd->vdev_top = vd; 1791 vd->vdev_aux = sav; 1792 1793 spa_l2cache_activate(vd); 1794 1795 if (vdev_open(vd) != 0) 1796 continue; 1797 1798 (void) vdev_validate_aux(vd); 1799 1800 if (!vdev_is_dead(vd)) 1801 l2arc_add_vdev(spa, vd); 1802 } 1803 } 1804 1805 /* 1806 * Purge vdevs that were dropped 1807 */ 1808 for (i = 0; i < oldnvdevs; i++) { 1809 uint64_t pool; 1810 1811 vd = oldvdevs[i]; 1812 if (vd != NULL) { 1813 ASSERT(vd->vdev_isl2cache); 1814 1815 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1816 pool != 0ULL && l2arc_vdev_present(vd)) 1817 l2arc_remove_vdev(vd); 1818 vdev_clear_stats(vd); 1819 vdev_free(vd); 1820 } 1821 } 1822 1823 if (oldvdevs) 1824 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1825 1826 if (sav->sav_config == NULL) 1827 goto out; 1828 1829 sav->sav_vdevs = newvdevs; 1830 sav->sav_count = (int)nl2cache; 1831 1832 /* 1833 * Recompute the stashed list of l2cache devices, with status 1834 * information this time. 1835 */ 1836 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1837 DATA_TYPE_NVLIST_ARRAY) == 0); 1838 1839 l2cache = NULL; 1840 if (sav->sav_count > 0) { 1841 l2cache = kmem_alloc( 1842 sav->sav_count * sizeof (void *), KM_SLEEP); 1843 } 1844 for (i = 0; i < sav->sav_count; i++) 1845 l2cache[i] = vdev_config_generate(spa, 1846 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1847 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1848 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1849 out: 1850 for (i = 0; i < sav->sav_count; i++) 1851 nvlist_free(l2cache[i]); 1852 if (sav->sav_count) 1853 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1854 } 1855 1856 static int 1857 load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1858 { 1859 dmu_buf_t *db; 1860 char *packed = NULL; 1861 size_t nvsize = 0; 1862 int error; 1863 *value = NULL; 1864 1865 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); 1866 if (error != 0) 1867 return (error); 1868 1869 nvsize = *(uint64_t *)db->db_data; 1870 dmu_buf_rele(db, FTAG); 1871 1872 packed = kmem_alloc(nvsize, KM_SLEEP); 1873 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1874 DMU_READ_PREFETCH); 1875 if (error == 0) 1876 error = nvlist_unpack(packed, nvsize, value, 0); 1877 kmem_free(packed, nvsize); 1878 1879 return (error); 1880 } 1881 1882 /* 1883 * Concrete top-level vdevs that are not missing and are not logs. At every 1884 * spa_sync we write new uberblocks to at least SPA_SYNC_MIN_VDEVS core tvds. 1885 */ 1886 static uint64_t 1887 spa_healthy_core_tvds(spa_t *spa) 1888 { 1889 vdev_t *rvd = spa->spa_root_vdev; 1890 uint64_t tvds = 0; 1891 1892 for (uint64_t i = 0; i < rvd->vdev_children; i++) { 1893 vdev_t *vd = rvd->vdev_child[i]; 1894 if (vd->vdev_islog) 1895 continue; 1896 if (vdev_is_concrete(vd) && !vdev_is_dead(vd)) 1897 tvds++; 1898 } 1899 1900 return (tvds); 1901 } 1902 1903 /* 1904 * Checks to see if the given vdev could not be opened, in which case we post a 1905 * sysevent to notify the autoreplace code that the device has been removed. 1906 */ 1907 static void 1908 spa_check_removed(vdev_t *vd) 1909 { 1910 for (uint64_t c = 0; c < vd->vdev_children; c++) 1911 spa_check_removed(vd->vdev_child[c]); 1912 1913 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && 1914 vdev_is_concrete(vd)) { 1915 zfs_post_autoreplace(vd->vdev_spa, vd); 1916 spa_event_notify(vd->vdev_spa, vd, NULL, ESC_ZFS_VDEV_CHECK); 1917 } 1918 } 1919 1920 static int 1921 spa_check_for_missing_logs(spa_t *spa) 1922 { 1923 vdev_t *rvd = spa->spa_root_vdev; 1924 1925 /* 1926 * If we're doing a normal import, then build up any additional 1927 * diagnostic information about missing log devices. 1928 * We'll pass this up to the user for further processing. 1929 */ 1930 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1931 nvlist_t **child, *nv; 1932 uint64_t idx = 0; 1933 1934 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1935 KM_SLEEP); 1936 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1937 1938 for (uint64_t c = 0; c < rvd->vdev_children; c++) { 1939 vdev_t *tvd = rvd->vdev_child[c]; 1940 1941 /* 1942 * We consider a device as missing only if it failed 1943 * to open (i.e. offline or faulted is not considered 1944 * as missing). 1945 */ 1946 if (tvd->vdev_islog && 1947 tvd->vdev_state == VDEV_STATE_CANT_OPEN) { 1948 child[idx++] = vdev_config_generate(spa, tvd, 1949 B_FALSE, VDEV_CONFIG_MISSING); 1950 } 1951 } 1952 1953 if (idx > 0) { 1954 fnvlist_add_nvlist_array(nv, 1955 ZPOOL_CONFIG_CHILDREN, child, idx); 1956 fnvlist_add_nvlist(spa->spa_load_info, 1957 ZPOOL_CONFIG_MISSING_DEVICES, nv); 1958 1959 for (uint64_t i = 0; i < idx; i++) 1960 nvlist_free(child[i]); 1961 } 1962 nvlist_free(nv); 1963 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1964 1965 if (idx > 0) { 1966 spa_load_failed(spa, "some log devices are missing"); 1967 vdev_dbgmsg_print_tree(rvd, 2); 1968 return (SET_ERROR(ENXIO)); 1969 } 1970 } else { 1971 for (uint64_t c = 0; c < rvd->vdev_children; c++) { 1972 vdev_t *tvd = rvd->vdev_child[c]; 1973 1974 if (tvd->vdev_islog && 1975 tvd->vdev_state == VDEV_STATE_CANT_OPEN) { 1976 spa_set_log_state(spa, SPA_LOG_CLEAR); 1977 spa_load_note(spa, "some log devices are " 1978 "missing, ZIL is dropped."); 1979 vdev_dbgmsg_print_tree(rvd, 2); 1980 break; 1981 } 1982 } 1983 } 1984 1985 return (0); 1986 } 1987 1988 /* 1989 * Check for missing log devices 1990 */ 1991 static boolean_t 1992 spa_check_logs(spa_t *spa) 1993 { 1994 boolean_t rv = B_FALSE; 1995 dsl_pool_t *dp = spa_get_dsl(spa); 1996 1997 switch (spa->spa_log_state) { 1998 case SPA_LOG_MISSING: 1999 /* need to recheck in case slog has been restored */ 2000 case SPA_LOG_UNKNOWN: 2001 rv = (dmu_objset_find_dp(dp, dp->dp_root_dir_obj, 2002 zil_check_log_chain, NULL, DS_FIND_CHILDREN) != 0); 2003 if (rv) 2004 spa_set_log_state(spa, SPA_LOG_MISSING); 2005 break; 2006 } 2007 return (rv); 2008 } 2009 2010 static boolean_t 2011 spa_passivate_log(spa_t *spa) 2012 { 2013 vdev_t *rvd = spa->spa_root_vdev; 2014 boolean_t slog_found = B_FALSE; 2015 2016 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 2017 2018 if (!spa_has_slogs(spa)) 2019 return (B_FALSE); 2020 2021 for (int c = 0; c < rvd->vdev_children; c++) { 2022 vdev_t *tvd = rvd->vdev_child[c]; 2023 metaslab_group_t *mg = tvd->vdev_mg; 2024 2025 if (tvd->vdev_islog) { 2026 metaslab_group_passivate(mg); 2027 slog_found = B_TRUE; 2028 } 2029 } 2030 2031 return (slog_found); 2032 } 2033 2034 static void 2035 spa_activate_log(spa_t *spa) 2036 { 2037 vdev_t *rvd = spa->spa_root_vdev; 2038 2039 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 2040 2041 for (int c = 0; c < rvd->vdev_children; c++) { 2042 vdev_t *tvd = rvd->vdev_child[c]; 2043 metaslab_group_t *mg = tvd->vdev_mg; 2044 2045 if (tvd->vdev_islog) 2046 metaslab_group_activate(mg); 2047 } 2048 } 2049 2050 int 2051 spa_reset_logs(spa_t *spa) 2052 { 2053 int error; 2054 2055 error = dmu_objset_find(spa_name(spa), zil_reset, 2056 NULL, DS_FIND_CHILDREN); 2057 if (error == 0) { 2058 /* 2059 * We successfully offlined the log device, sync out the 2060 * current txg so that the "stubby" block can be removed 2061 * by zil_sync(). 2062 */ 2063 txg_wait_synced(spa->spa_dsl_pool, 0); 2064 } 2065 return (error); 2066 } 2067 2068 static void 2069 spa_aux_check_removed(spa_aux_vdev_t *sav) 2070 { 2071 for (int i = 0; i < sav->sav_count; i++) 2072 spa_check_removed(sav->sav_vdevs[i]); 2073 } 2074 2075 void 2076 spa_claim_notify(zio_t *zio) 2077 { 2078 spa_t *spa = zio->io_spa; 2079 2080 if (zio->io_error) 2081 return; 2082 2083 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 2084 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 2085 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 2086 mutex_exit(&spa->spa_props_lock); 2087 } 2088 2089 typedef struct spa_load_error { 2090 uint64_t sle_meta_count; 2091 uint64_t sle_data_count; 2092 } spa_load_error_t; 2093 2094 static void 2095 spa_load_verify_done(zio_t *zio) 2096 { 2097 blkptr_t *bp = zio->io_bp; 2098 spa_load_error_t *sle = zio->io_private; 2099 dmu_object_type_t type = BP_GET_TYPE(bp); 2100 int error = zio->io_error; 2101 spa_t *spa = zio->io_spa; 2102 2103 abd_free(zio->io_abd); 2104 if (error) { 2105 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 2106 type != DMU_OT_INTENT_LOG) 2107 atomic_inc_64(&sle->sle_meta_count); 2108 else 2109 atomic_inc_64(&sle->sle_data_count); 2110 } 2111 2112 mutex_enter(&spa->spa_scrub_lock); 2113 spa->spa_load_verify_ios--; 2114 cv_broadcast(&spa->spa_scrub_io_cv); 2115 mutex_exit(&spa->spa_scrub_lock); 2116 } 2117 2118 /* 2119 * Maximum number of concurrent scrub i/os to create while verifying 2120 * a pool while importing it. 2121 */ 2122 int spa_load_verify_maxinflight = 10000; 2123 boolean_t spa_load_verify_metadata = B_TRUE; 2124 boolean_t spa_load_verify_data = B_TRUE; 2125 2126 /*ARGSUSED*/ 2127 static int 2128 spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 2129 const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 2130 { 2131 if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp)) 2132 return (0); 2133 /* 2134 * Note: normally this routine will not be called if 2135 * spa_load_verify_metadata is not set. However, it may be useful 2136 * to manually set the flag after the traversal has begun. 2137 */ 2138 if (!spa_load_verify_metadata) 2139 return (0); 2140 if (!BP_IS_METADATA(bp) && !spa_load_verify_data) 2141 return (0); 2142 2143 zio_t *rio = arg; 2144 size_t size = BP_GET_PSIZE(bp); 2145 2146 mutex_enter(&spa->spa_scrub_lock); 2147 while (spa->spa_load_verify_ios >= spa_load_verify_maxinflight) 2148 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); 2149 spa->spa_load_verify_ios++; 2150 mutex_exit(&spa->spa_scrub_lock); 2151 2152 zio_nowait(zio_read(rio, spa, bp, abd_alloc_for_io(size, B_FALSE), size, 2153 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 2154 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 2155 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 2156 return (0); 2157 } 2158 2159 /* ARGSUSED */ 2160 int 2161 verify_dataset_name_len(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg) 2162 { 2163 if (dsl_dataset_namelen(ds) >= ZFS_MAX_DATASET_NAME_LEN) 2164 return (SET_ERROR(ENAMETOOLONG)); 2165 2166 return (0); 2167 } 2168 2169 static int 2170 spa_load_verify(spa_t *spa) 2171 { 2172 zio_t *rio; 2173 spa_load_error_t sle = { 0 }; 2174 zpool_load_policy_t policy; 2175 boolean_t verify_ok = B_FALSE; 2176 int error = 0; 2177 2178 zpool_get_load_policy(spa->spa_config, &policy); 2179 2180 if (policy.zlp_rewind & ZPOOL_NEVER_REWIND) 2181 return (0); 2182 2183 dsl_pool_config_enter(spa->spa_dsl_pool, FTAG); 2184 error = dmu_objset_find_dp(spa->spa_dsl_pool, 2185 spa->spa_dsl_pool->dp_root_dir_obj, verify_dataset_name_len, NULL, 2186 DS_FIND_CHILDREN); 2187 dsl_pool_config_exit(spa->spa_dsl_pool, FTAG); 2188 if (error != 0) 2189 return (error); 2190 2191 rio = zio_root(spa, NULL, &sle, 2192 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 2193 2194 if (spa_load_verify_metadata) { 2195 if (spa->spa_extreme_rewind) { 2196 spa_load_note(spa, "performing a complete scan of the " 2197 "pool since extreme rewind is on. This may take " 2198 "a very long time.\n (spa_load_verify_data=%u, " 2199 "spa_load_verify_metadata=%u)", 2200 spa_load_verify_data, spa_load_verify_metadata); 2201 } 2202 error = traverse_pool(spa, spa->spa_verify_min_txg, 2203 TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | 2204 TRAVERSE_NO_DECRYPT, spa_load_verify_cb, rio); 2205 } 2206 2207 (void) zio_wait(rio); 2208 2209 spa->spa_load_meta_errors = sle.sle_meta_count; 2210 spa->spa_load_data_errors = sle.sle_data_count; 2211 2212 if (sle.sle_meta_count != 0 || sle.sle_data_count != 0) { 2213 spa_load_note(spa, "spa_load_verify found %llu metadata errors " 2214 "and %llu data errors", (u_longlong_t)sle.sle_meta_count, 2215 (u_longlong_t)sle.sle_data_count); 2216 } 2217 2218 if (spa_load_verify_dryrun || 2219 (!error && sle.sle_meta_count <= policy.zlp_maxmeta && 2220 sle.sle_data_count <= policy.zlp_maxdata)) { 2221 int64_t loss = 0; 2222 2223 verify_ok = B_TRUE; 2224 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 2225 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 2226 2227 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 2228 VERIFY(nvlist_add_uint64(spa->spa_load_info, 2229 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 2230 VERIFY(nvlist_add_int64(spa->spa_load_info, 2231 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 2232 VERIFY(nvlist_add_uint64(spa->spa_load_info, 2233 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 2234 } else { 2235 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 2236 } 2237 2238 if (spa_load_verify_dryrun) 2239 return (0); 2240 2241 if (error) { 2242 if (error != ENXIO && error != EIO) 2243 error = SET_ERROR(EIO); 2244 return (error); 2245 } 2246 2247 return (verify_ok ? 0 : EIO); 2248 } 2249 2250 /* 2251 * Find a value in the pool props object. 2252 */ 2253 static void 2254 spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 2255 { 2256 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 2257 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 2258 } 2259 2260 /* 2261 * Find a value in the pool directory object. 2262 */ 2263 static int 2264 spa_dir_prop(spa_t *spa, const char *name, uint64_t *val, boolean_t log_enoent) 2265 { 2266 int error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 2267 name, sizeof (uint64_t), 1, val); 2268 2269 if (error != 0 && (error != ENOENT || log_enoent)) { 2270 spa_load_failed(spa, "couldn't get '%s' value in MOS directory " 2271 "[error=%d]", name, error); 2272 } 2273 2274 return (error); 2275 } 2276 2277 static int 2278 spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 2279 { 2280 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 2281 return (SET_ERROR(err)); 2282 } 2283 2284 static void 2285 spa_spawn_aux_threads(spa_t *spa) 2286 { 2287 ASSERT(spa_writeable(spa)); 2288 2289 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2290 2291 spa_start_indirect_condensing_thread(spa); 2292 2293 ASSERT3P(spa->spa_checkpoint_discard_zthr, ==, NULL); 2294 spa->spa_checkpoint_discard_zthr = 2295 zthr_create(spa_checkpoint_discard_thread_check, 2296 spa_checkpoint_discard_thread, spa); 2297 } 2298 2299 /* 2300 * Fix up config after a partly-completed split. This is done with the 2301 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 2302 * pool have that entry in their config, but only the splitting one contains 2303 * a list of all the guids of the vdevs that are being split off. 2304 * 2305 * This function determines what to do with that list: either rejoin 2306 * all the disks to the pool, or complete the splitting process. To attempt 2307 * the rejoin, each disk that is offlined is marked online again, and 2308 * we do a reopen() call. If the vdev label for every disk that was 2309 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 2310 * then we call vdev_split() on each disk, and complete the split. 2311 * 2312 * Otherwise we leave the config alone, with all the vdevs in place in 2313 * the original pool. 2314 */ 2315 static void 2316 spa_try_repair(spa_t *spa, nvlist_t *config) 2317 { 2318 uint_t extracted; 2319 uint64_t *glist; 2320 uint_t i, gcount; 2321 nvlist_t *nvl; 2322 vdev_t **vd; 2323 boolean_t attempt_reopen; 2324 2325 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 2326 return; 2327 2328 /* check that the config is complete */ 2329 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 2330 &glist, &gcount) != 0) 2331 return; 2332 2333 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 2334 2335 /* attempt to online all the vdevs & validate */ 2336 attempt_reopen = B_TRUE; 2337 for (i = 0; i < gcount; i++) { 2338 if (glist[i] == 0) /* vdev is hole */ 2339 continue; 2340 2341 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 2342 if (vd[i] == NULL) { 2343 /* 2344 * Don't bother attempting to reopen the disks; 2345 * just do the split. 2346 */ 2347 attempt_reopen = B_FALSE; 2348 } else { 2349 /* attempt to re-online it */ 2350 vd[i]->vdev_offline = B_FALSE; 2351 } 2352 } 2353 2354 if (attempt_reopen) { 2355 vdev_reopen(spa->spa_root_vdev); 2356 2357 /* check each device to see what state it's in */ 2358 for (extracted = 0, i = 0; i < gcount; i++) { 2359 if (vd[i] != NULL && 2360 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 2361 break; 2362 ++extracted; 2363 } 2364 } 2365 2366 /* 2367 * If every disk has been moved to the new pool, or if we never 2368 * even attempted to look at them, then we split them off for 2369 * good. 2370 */ 2371 if (!attempt_reopen || gcount == extracted) { 2372 for (i = 0; i < gcount; i++) 2373 if (vd[i] != NULL) 2374 vdev_split(vd[i]); 2375 vdev_reopen(spa->spa_root_vdev); 2376 } 2377 2378 kmem_free(vd, gcount * sizeof (vdev_t *)); 2379 } 2380 2381 static int 2382 spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type) 2383 { 2384 char *ereport = FM_EREPORT_ZFS_POOL; 2385 int error; 2386 2387 spa->spa_load_state = state; 2388 (void) spa_import_progress_set_state(spa, spa_load_state(spa)); 2389 2390 gethrestime(&spa->spa_loaded_ts); 2391 error = spa_load_impl(spa, type, &ereport); 2392 2393 /* 2394 * Don't count references from objsets that are already closed 2395 * and are making their way through the eviction process. 2396 */ 2397 spa_evicting_os_wait(spa); 2398 spa->spa_minref = zfs_refcount_count(&spa->spa_refcount); 2399 if (error) { 2400 if (error != EEXIST) { 2401 spa->spa_loaded_ts.tv_sec = 0; 2402 spa->spa_loaded_ts.tv_nsec = 0; 2403 } 2404 if (error != EBADF) { 2405 (void) zfs_ereport_post(ereport, spa, 2406 NULL, NULL, NULL, 0, 0); 2407 } 2408 } 2409 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 2410 spa->spa_ena = 0; 2411 2412 (void) spa_import_progress_set_state(spa, spa_load_state(spa)); 2413 2414 return (error); 2415 } 2416 2417 /* 2418 * Count the number of per-vdev ZAPs associated with all of the vdevs in the 2419 * vdev tree rooted in the given vd, and ensure that each ZAP is present in the 2420 * spa's per-vdev ZAP list. 2421 */ 2422 static uint64_t 2423 vdev_count_verify_zaps(vdev_t *vd) 2424 { 2425 spa_t *spa = vd->vdev_spa; 2426 uint64_t total = 0; 2427 if (vd->vdev_top_zap != 0) { 2428 total++; 2429 ASSERT0(zap_lookup_int(spa->spa_meta_objset, 2430 spa->spa_all_vdev_zaps, vd->vdev_top_zap)); 2431 } 2432 if (vd->vdev_leaf_zap != 0) { 2433 total++; 2434 ASSERT0(zap_lookup_int(spa->spa_meta_objset, 2435 spa->spa_all_vdev_zaps, vd->vdev_leaf_zap)); 2436 } 2437 2438 for (uint64_t i = 0; i < vd->vdev_children; i++) { 2439 total += vdev_count_verify_zaps(vd->vdev_child[i]); 2440 } 2441 2442 return (total); 2443 } 2444 2445 /* 2446 * Determine whether the activity check is required. 2447 */ 2448 static boolean_t 2449 spa_activity_check_required(spa_t *spa, uberblock_t *ub, nvlist_t *label, 2450 nvlist_t *config) 2451 { 2452 uint64_t state = 0; 2453 uint64_t hostid = 0; 2454 uint64_t tryconfig_txg = 0; 2455 uint64_t tryconfig_timestamp = 0; 2456 uint16_t tryconfig_mmp_seq = 0; 2457 nvlist_t *nvinfo; 2458 2459 if (nvlist_exists(config, ZPOOL_CONFIG_LOAD_INFO)) { 2460 nvinfo = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO); 2461 (void) nvlist_lookup_uint64(nvinfo, ZPOOL_CONFIG_MMP_TXG, 2462 &tryconfig_txg); 2463 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 2464 &tryconfig_timestamp); 2465 (void) nvlist_lookup_uint16(nvinfo, ZPOOL_CONFIG_MMP_SEQ, 2466 &tryconfig_mmp_seq); 2467 } 2468 2469 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, &state); 2470 2471 /* 2472 * Disable the MMP activity check - This is used by zdb which 2473 * is intended to be used on potentially active pools. 2474 */ 2475 if (spa->spa_import_flags & ZFS_IMPORT_SKIP_MMP) 2476 return (B_FALSE); 2477 2478 /* 2479 * Skip the activity check when the MMP feature is disabled. 2480 */ 2481 if (ub->ub_mmp_magic == MMP_MAGIC && ub->ub_mmp_delay == 0) 2482 return (B_FALSE); 2483 2484 /* 2485 * If the tryconfig_ values are nonzero, they are the results of an 2486 * earlier tryimport. If they all match the uberblock we just found, 2487 * then the pool has not changed and we return false so we do not test 2488 * a second time. 2489 */ 2490 if (tryconfig_txg && tryconfig_txg == ub->ub_txg && 2491 tryconfig_timestamp && tryconfig_timestamp == ub->ub_timestamp && 2492 tryconfig_mmp_seq && tryconfig_mmp_seq == 2493 (MMP_SEQ_VALID(ub) ? MMP_SEQ(ub) : 0)) 2494 return (B_FALSE); 2495 2496 /* 2497 * Allow the activity check to be skipped when importing the pool 2498 * on the same host which last imported it. Since the hostid from 2499 * configuration may be stale use the one read from the label. 2500 */ 2501 if (nvlist_exists(label, ZPOOL_CONFIG_HOSTID)) 2502 hostid = fnvlist_lookup_uint64(label, ZPOOL_CONFIG_HOSTID); 2503 2504 if (hostid == spa_get_hostid()) 2505 return (B_FALSE); 2506 2507 /* 2508 * Skip the activity test when the pool was cleanly exported. 2509 */ 2510 if (state != POOL_STATE_ACTIVE) 2511 return (B_FALSE); 2512 2513 return (B_TRUE); 2514 } 2515 2516 /* 2517 * Nanoseconds the activity check must watch for changes on-disk. 2518 */ 2519 static uint64_t 2520 spa_activity_check_duration(spa_t *spa, uberblock_t *ub) 2521 { 2522 uint64_t import_intervals = MAX(zfs_multihost_import_intervals, 1); 2523 uint64_t multihost_interval = MSEC2NSEC( 2524 MMP_INTERVAL_OK(zfs_multihost_interval)); 2525 uint64_t import_delay = MAX(NANOSEC, import_intervals * 2526 multihost_interval); 2527 2528 /* 2529 * Local tunables determine a minimum duration except for the case 2530 * where we know when the remote host will suspend the pool if MMP 2531 * writes do not land. 2532 * 2533 * See Big Theory comment at the top of mmp.c for the reasoning behind 2534 * these cases and times. 2535 */ 2536 2537 ASSERT(MMP_IMPORT_SAFETY_FACTOR >= 100); 2538 2539 if (MMP_INTERVAL_VALID(ub) && MMP_FAIL_INT_VALID(ub) && 2540 MMP_FAIL_INT(ub) > 0) { 2541 2542 /* MMP on remote host will suspend pool after failed writes */ 2543 import_delay = MMP_FAIL_INT(ub) * MSEC2NSEC(MMP_INTERVAL(ub)) * 2544 MMP_IMPORT_SAFETY_FACTOR / 100; 2545 2546 zfs_dbgmsg("fail_intvals>0 import_delay=%llu ub_mmp " 2547 "mmp_fails=%llu ub_mmp mmp_interval=%llu " 2548 "import_intervals=%u", import_delay, MMP_FAIL_INT(ub), 2549 MMP_INTERVAL(ub), import_intervals); 2550 2551 } else if (MMP_INTERVAL_VALID(ub) && MMP_FAIL_INT_VALID(ub) && 2552 MMP_FAIL_INT(ub) == 0) { 2553 2554 /* MMP on remote host will never suspend pool */ 2555 import_delay = MAX(import_delay, (MSEC2NSEC(MMP_INTERVAL(ub)) + 2556 ub->ub_mmp_delay) * import_intervals); 2557 2558 zfs_dbgmsg("fail_intvals=0 import_delay=%llu ub_mmp " 2559 "mmp_interval=%llu ub_mmp_delay=%llu " 2560 "import_intervals=%u", import_delay, MMP_INTERVAL(ub), 2561 ub->ub_mmp_delay, import_intervals); 2562 2563 } else if (MMP_VALID(ub)) { 2564 /* 2565 * zfs-0.7 compatability case 2566 */ 2567 2568 import_delay = MAX(import_delay, (multihost_interval + 2569 ub->ub_mmp_delay) * import_intervals); 2570 2571 zfs_dbgmsg("import_delay=%llu ub_mmp_delay=%llu " 2572 "import_intervals=%u leaves=%u", import_delay, 2573 ub->ub_mmp_delay, import_intervals, 2574 vdev_count_leaves(spa)); 2575 } else { 2576 /* Using local tunings is the only reasonable option */ 2577 zfs_dbgmsg("pool last imported on non-MMP aware " 2578 "host using import_delay=%llu multihost_interval=%llu " 2579 "import_intervals=%u", import_delay, multihost_interval, 2580 import_intervals); 2581 } 2582 2583 return (import_delay); 2584 } 2585 2586 /* 2587 * Perform the import activity check. If the user canceled the import or 2588 * we detected activity then fail. 2589 */ 2590 static int 2591 spa_activity_check(spa_t *spa, uberblock_t *ub, nvlist_t *config) 2592 { 2593 uint64_t txg = ub->ub_txg; 2594 uint64_t timestamp = ub->ub_timestamp; 2595 uint64_t mmp_config = ub->ub_mmp_config; 2596 uint16_t mmp_seq = MMP_SEQ_VALID(ub) ? MMP_SEQ(ub) : 0; 2597 uint64_t import_delay; 2598 hrtime_t import_expire; 2599 nvlist_t *mmp_label = NULL; 2600 vdev_t *rvd = spa->spa_root_vdev; 2601 kcondvar_t cv; 2602 kmutex_t mtx; 2603 int error = 0; 2604 2605 cv_init(&cv, NULL, CV_DEFAULT, NULL); 2606 mutex_init(&mtx, NULL, MUTEX_DEFAULT, NULL); 2607 mutex_enter(&mtx); 2608 2609 /* 2610 * If ZPOOL_CONFIG_MMP_TXG is present an activity check was performed 2611 * during the earlier tryimport. If the txg recorded there is 0 then 2612 * the pool is known to be active on another host. 2613 * 2614 * Otherwise, the pool might be in use on another host. Check for 2615 * changes in the uberblocks on disk if necessary. 2616 */ 2617 if (nvlist_exists(config, ZPOOL_CONFIG_LOAD_INFO)) { 2618 nvlist_t *nvinfo = fnvlist_lookup_nvlist(config, 2619 ZPOOL_CONFIG_LOAD_INFO); 2620 2621 if (nvlist_exists(nvinfo, ZPOOL_CONFIG_MMP_TXG) && 2622 fnvlist_lookup_uint64(nvinfo, ZPOOL_CONFIG_MMP_TXG) == 0) { 2623 vdev_uberblock_load(rvd, ub, &mmp_label); 2624 error = SET_ERROR(EREMOTEIO); 2625 goto out; 2626 } 2627 } 2628 2629 import_delay = spa_activity_check_duration(spa, ub); 2630 2631 /* Add a small random factor in case of simultaneous imports (0-25%) */ 2632 import_delay += import_delay * spa_get_random(250) / 1000; 2633 2634 import_expire = gethrtime() + import_delay; 2635 2636 while (gethrtime() < import_expire) { 2637 (void) spa_import_progress_set_mmp_check(spa, 2638 NSEC2SEC(import_expire - gethrtime())); 2639 2640 vdev_uberblock_load(rvd, ub, &mmp_label); 2641 2642 if (txg != ub->ub_txg || timestamp != ub->ub_timestamp || 2643 mmp_seq != (MMP_SEQ_VALID(ub) ? MMP_SEQ(ub) : 0)) { 2644 zfs_dbgmsg("multihost activity detected " 2645 "txg %llu ub_txg %llu " 2646 "timestamp %llu ub_timestamp %llu " 2647 "mmp_config %#llx ub_mmp_config %#llx", 2648 txg, ub->ub_txg, timestamp, ub->ub_timestamp, 2649 mmp_config, ub->ub_mmp_config); 2650 2651 error = SET_ERROR(EREMOTEIO); 2652 break; 2653 } 2654 2655 if (mmp_label) { 2656 nvlist_free(mmp_label); 2657 mmp_label = NULL; 2658 } 2659 2660 error = cv_timedwait_sig(&cv, &mtx, ddi_get_lbolt() + hz); 2661 if (error != -1) { 2662 error = SET_ERROR(EINTR); 2663 break; 2664 } 2665 error = 0; 2666 } 2667 2668 out: 2669 mutex_exit(&mtx); 2670 mutex_destroy(&mtx); 2671 cv_destroy(&cv); 2672 2673 /* 2674 * If the pool is determined to be active store the status in the 2675 * spa->spa_load_info nvlist. If the remote hostname or hostid are 2676 * available from configuration read from disk store them as well. 2677 * This allows 'zpool import' to generate a more useful message. 2678 * 2679 * ZPOOL_CONFIG_MMP_STATE - observed pool status (mandatory) 2680 * ZPOOL_CONFIG_MMP_HOSTNAME - hostname from the active pool 2681 * ZPOOL_CONFIG_MMP_HOSTID - hostid from the active pool 2682 */ 2683 if (error == EREMOTEIO) { 2684 char *hostname = "<unknown>"; 2685 uint64_t hostid = 0; 2686 2687 if (mmp_label) { 2688 if (nvlist_exists(mmp_label, ZPOOL_CONFIG_HOSTNAME)) { 2689 hostname = fnvlist_lookup_string(mmp_label, 2690 ZPOOL_CONFIG_HOSTNAME); 2691 fnvlist_add_string(spa->spa_load_info, 2692 ZPOOL_CONFIG_MMP_HOSTNAME, hostname); 2693 } 2694 2695 if (nvlist_exists(mmp_label, ZPOOL_CONFIG_HOSTID)) { 2696 hostid = fnvlist_lookup_uint64(mmp_label, 2697 ZPOOL_CONFIG_HOSTID); 2698 fnvlist_add_uint64(spa->spa_load_info, 2699 ZPOOL_CONFIG_MMP_HOSTID, hostid); 2700 } 2701 } 2702 2703 fnvlist_add_uint64(spa->spa_load_info, 2704 ZPOOL_CONFIG_MMP_STATE, MMP_STATE_ACTIVE); 2705 fnvlist_add_uint64(spa->spa_load_info, 2706 ZPOOL_CONFIG_MMP_TXG, 0); 2707 2708 error = spa_vdev_err(rvd, VDEV_AUX_ACTIVE, EREMOTEIO); 2709 } 2710 2711 if (mmp_label) 2712 nvlist_free(mmp_label); 2713 2714 return (error); 2715 } 2716 2717 static int 2718 spa_verify_host(spa_t *spa, nvlist_t *mos_config) 2719 { 2720 uint64_t hostid; 2721 char *hostname; 2722 uint64_t myhostid = 0; 2723 2724 if (!spa_is_root(spa) && nvlist_lookup_uint64(mos_config, 2725 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2726 hostname = fnvlist_lookup_string(mos_config, 2727 ZPOOL_CONFIG_HOSTNAME); 2728 2729 myhostid = zone_get_hostid(NULL); 2730 2731 if (hostid != 0 && myhostid != 0 && hostid != myhostid) { 2732 cmn_err(CE_WARN, "pool '%s' could not be " 2733 "loaded as it was last accessed by " 2734 "another system (host: %s hostid: 0x%llx). " 2735 "See: http://illumos.org/msg/ZFS-8000-EY", 2736 spa_name(spa), hostname, (u_longlong_t)hostid); 2737 spa_load_failed(spa, "hostid verification failed: pool " 2738 "last accessed by host: %s (hostid: 0x%llx)", 2739 hostname, (u_longlong_t)hostid); 2740 return (SET_ERROR(EBADF)); 2741 } 2742 } 2743 2744 return (0); 2745 } 2746 2747 static int 2748 spa_ld_parse_config(spa_t *spa, spa_import_type_t type) 2749 { 2750 int error = 0; 2751 nvlist_t *nvtree, *nvl, *config = spa->spa_config; 2752 int parse; 2753 vdev_t *rvd; 2754 uint64_t pool_guid; 2755 char *comment; 2756 2757 /* 2758 * Versioning wasn't explicitly added to the label until later, so if 2759 * it's not present treat it as the initial version. 2760 */ 2761 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 2762 &spa->spa_ubsync.ub_version) != 0) 2763 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 2764 2765 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) { 2766 spa_load_failed(spa, "invalid config provided: '%s' missing", 2767 ZPOOL_CONFIG_POOL_GUID); 2768 return (SET_ERROR(EINVAL)); 2769 } 2770 2771 /* 2772 * If we are doing an import, ensure that the pool is not already 2773 * imported by checking if its pool guid already exists in the 2774 * spa namespace. 2775 * 2776 * The only case that we allow an already imported pool to be 2777 * imported again, is when the pool is checkpointed and we want to 2778 * look at its checkpointed state from userland tools like zdb. 2779 */ 2780 #ifdef _KERNEL 2781 if ((spa->spa_load_state == SPA_LOAD_IMPORT || 2782 spa->spa_load_state == SPA_LOAD_TRYIMPORT) && 2783 spa_guid_exists(pool_guid, 0)) { 2784 #else 2785 if ((spa->spa_load_state == SPA_LOAD_IMPORT || 2786 spa->spa_load_state == SPA_LOAD_TRYIMPORT) && 2787 spa_guid_exists(pool_guid, 0) && 2788 !spa_importing_readonly_checkpoint(spa)) { 2789 #endif 2790 spa_load_failed(spa, "a pool with guid %llu is already open", 2791 (u_longlong_t)pool_guid); 2792 return (SET_ERROR(EEXIST)); 2793 } 2794 2795 spa->spa_config_guid = pool_guid; 2796 2797 nvlist_free(spa->spa_load_info); 2798 spa->spa_load_info = fnvlist_alloc(); 2799 2800 ASSERT(spa->spa_comment == NULL); 2801 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 2802 spa->spa_comment = spa_strdup(comment); 2803 2804 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 2805 &spa->spa_config_txg); 2806 2807 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) == 0) 2808 spa->spa_config_splitting = fnvlist_dup(nvl); 2809 2810 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvtree)) { 2811 spa_load_failed(spa, "invalid config provided: '%s' missing", 2812 ZPOOL_CONFIG_VDEV_TREE); 2813 return (SET_ERROR(EINVAL)); 2814 } 2815 2816 /* 2817 * Create "The Godfather" zio to hold all async IOs 2818 */ 2819 spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *), 2820 KM_SLEEP); 2821 for (int i = 0; i < max_ncpus; i++) { 2822 spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL, 2823 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | 2824 ZIO_FLAG_GODFATHER); 2825 } 2826 2827 /* 2828 * Parse the configuration into a vdev tree. We explicitly set the 2829 * value that will be returned by spa_version() since parsing the 2830 * configuration requires knowing the version number. 2831 */ 2832 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2833 parse = (type == SPA_IMPORT_EXISTING ? 2834 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 2835 error = spa_config_parse(spa, &rvd, nvtree, NULL, 0, parse); 2836 spa_config_exit(spa, SCL_ALL, FTAG); 2837 2838 if (error != 0) { 2839 spa_load_failed(spa, "unable to parse config [error=%d]", 2840 error); 2841 return (error); 2842 } 2843 2844 ASSERT(spa->spa_root_vdev == rvd); 2845 ASSERT3U(spa->spa_min_ashift, >=, SPA_MINBLOCKSHIFT); 2846 ASSERT3U(spa->spa_max_ashift, <=, SPA_MAXBLOCKSHIFT); 2847 2848 if (type != SPA_IMPORT_ASSEMBLE) { 2849 ASSERT(spa_guid(spa) == pool_guid); 2850 } 2851 2852 return (0); 2853 } 2854 2855 /* 2856 * Recursively open all vdevs in the vdev tree. This function is called twice: 2857 * first with the untrusted config, then with the trusted config. 2858 */ 2859 static int 2860 spa_ld_open_vdevs(spa_t *spa) 2861 { 2862 int error = 0; 2863 2864 /* 2865 * spa_missing_tvds_allowed defines how many top-level vdevs can be 2866 * missing/unopenable for the root vdev to be still considered openable. 2867 */ 2868 if (spa->spa_trust_config) { 2869 spa->spa_missing_tvds_allowed = zfs_max_missing_tvds; 2870 } else if (spa->spa_config_source == SPA_CONFIG_SRC_CACHEFILE) { 2871 spa->spa_missing_tvds_allowed = zfs_max_missing_tvds_cachefile; 2872 } else if (spa->spa_config_source == SPA_CONFIG_SRC_SCAN) { 2873 spa->spa_missing_tvds_allowed = zfs_max_missing_tvds_scan; 2874 } else { 2875 spa->spa_missing_tvds_allowed = 0; 2876 } 2877 2878 spa->spa_missing_tvds_allowed = 2879 MAX(zfs_max_missing_tvds, spa->spa_missing_tvds_allowed); 2880 2881 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2882 error = vdev_open(spa->spa_root_vdev); 2883 spa_config_exit(spa, SCL_ALL, FTAG); 2884 2885 if (spa->spa_missing_tvds != 0) { 2886 spa_load_note(spa, "vdev tree has %lld missing top-level " 2887 "vdevs.", (u_longlong_t)spa->spa_missing_tvds); 2888 if (spa->spa_trust_config && (spa->spa_mode & FWRITE)) { 2889 /* 2890 * Although theoretically we could allow users to open 2891 * incomplete pools in RW mode, we'd need to add a lot 2892 * of extra logic (e.g. adjust pool space to account 2893 * for missing vdevs). 2894 * This limitation also prevents users from accidentally 2895 * opening the pool in RW mode during data recovery and 2896 * damaging it further. 2897 */ 2898 spa_load_note(spa, "pools with missing top-level " 2899 "vdevs can only be opened in read-only mode."); 2900 error = SET_ERROR(ENXIO); 2901 } else { 2902 spa_load_note(spa, "current settings allow for maximum " 2903 "%lld missing top-level vdevs at this stage.", 2904 (u_longlong_t)spa->spa_missing_tvds_allowed); 2905 } 2906 } 2907 if (error != 0) { 2908 spa_load_failed(spa, "unable to open vdev tree [error=%d]", 2909 error); 2910 } 2911 if (spa->spa_missing_tvds != 0 || error != 0) 2912 vdev_dbgmsg_print_tree(spa->spa_root_vdev, 2); 2913 2914 return (error); 2915 } 2916 2917 /* 2918 * We need to validate the vdev labels against the configuration that 2919 * we have in hand. This function is called twice: first with an untrusted 2920 * config, then with a trusted config. The validation is more strict when the 2921 * config is trusted. 2922 */ 2923 static int 2924 spa_ld_validate_vdevs(spa_t *spa) 2925 { 2926 int error = 0; 2927 vdev_t *rvd = spa->spa_root_vdev; 2928 2929 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2930 error = vdev_validate(rvd); 2931 spa_config_exit(spa, SCL_ALL, FTAG); 2932 2933 if (error != 0) { 2934 spa_load_failed(spa, "vdev_validate failed [error=%d]", error); 2935 return (error); 2936 } 2937 2938 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) { 2939 spa_load_failed(spa, "cannot open vdev tree after invalidating " 2940 "some vdevs"); 2941 vdev_dbgmsg_print_tree(rvd, 2); 2942 return (SET_ERROR(ENXIO)); 2943 } 2944 2945 return (0); 2946 } 2947 2948 static void 2949 spa_ld_select_uberblock_done(spa_t *spa, uberblock_t *ub) 2950 { 2951 spa->spa_state = POOL_STATE_ACTIVE; 2952 spa->spa_ubsync = spa->spa_uberblock; 2953 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2954 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2955 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2956 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2957 spa->spa_claim_max_txg = spa->spa_first_txg; 2958 spa->spa_prev_software_version = ub->ub_software_version; 2959 } 2960 2961 static int 2962 spa_ld_select_uberblock(spa_t *spa, spa_import_type_t type) 2963 { 2964 vdev_t *rvd = spa->spa_root_vdev; 2965 nvlist_t *label; 2966 uberblock_t *ub = &spa->spa_uberblock; 2967 boolean_t activity_check = B_FALSE; 2968 2969 /* 2970 * If we are opening the checkpointed state of the pool by 2971 * rewinding to it, at this point we will have written the 2972 * checkpointed uberblock to the vdev labels, so searching 2973 * the labels will find the right uberblock. However, if 2974 * we are opening the checkpointed state read-only, we have 2975 * not modified the labels. Therefore, we must ignore the 2976 * labels and continue using the spa_uberblock that was set 2977 * by spa_ld_checkpoint_rewind. 2978 * 2979 * Note that it would be fine to ignore the labels when 2980 * rewinding (opening writeable) as well. However, if we 2981 * crash just after writing the labels, we will end up 2982 * searching the labels. Doing so in the common case means 2983 * that this code path gets exercised normally, rather than 2984 * just in the edge case. 2985 */ 2986 if (ub->ub_checkpoint_txg != 0 && 2987 spa_importing_readonly_checkpoint(spa)) { 2988 spa_ld_select_uberblock_done(spa, ub); 2989 return (0); 2990 } 2991 2992 /* 2993 * Find the best uberblock. 2994 */ 2995 vdev_uberblock_load(rvd, ub, &label); 2996 2997 /* 2998 * If we weren't able to find a single valid uberblock, return failure. 2999 */ 3000 if (ub->ub_txg == 0) { 3001 nvlist_free(label); 3002 spa_load_failed(spa, "no valid uberblock found"); 3003 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 3004 } 3005 3006 if (spa->spa_load_max_txg != UINT64_MAX) { 3007 (void) spa_import_progress_set_max_txg(spa, 3008 (u_longlong_t)spa->spa_load_max_txg); 3009 } 3010 spa_load_note(spa, "using uberblock with txg=%llu", 3011 (u_longlong_t)ub->ub_txg); 3012 3013 /* 3014 * For pools which have the multihost property on determine if the 3015 * pool is truly inactive and can be safely imported. Prevent 3016 * hosts which don't have a hostid set from importing the pool. 3017 */ 3018 activity_check = spa_activity_check_required(spa, ub, label, 3019 spa->spa_config); 3020 if (activity_check) { 3021 if (ub->ub_mmp_magic == MMP_MAGIC && ub->ub_mmp_delay && 3022 spa_get_hostid() == 0) { 3023 nvlist_free(label); 3024 fnvlist_add_uint64(spa->spa_load_info, 3025 ZPOOL_CONFIG_MMP_STATE, MMP_STATE_NO_HOSTID); 3026 return (spa_vdev_err(rvd, VDEV_AUX_ACTIVE, EREMOTEIO)); 3027 } 3028 3029 int error = spa_activity_check(spa, ub, spa->spa_config); 3030 if (error) { 3031 nvlist_free(label); 3032 return (error); 3033 } 3034 3035 fnvlist_add_uint64(spa->spa_load_info, 3036 ZPOOL_CONFIG_MMP_STATE, MMP_STATE_INACTIVE); 3037 fnvlist_add_uint64(spa->spa_load_info, 3038 ZPOOL_CONFIG_MMP_TXG, ub->ub_txg); 3039 fnvlist_add_uint16(spa->spa_load_info, 3040 ZPOOL_CONFIG_MMP_SEQ, 3041 (MMP_SEQ_VALID(ub) ? MMP_SEQ(ub) : 0)); 3042 } 3043 3044 /* 3045 * If the pool has an unsupported version we can't open it. 3046 */ 3047 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 3048 nvlist_free(label); 3049 spa_load_failed(spa, "version %llu is not supported", 3050 (u_longlong_t)ub->ub_version); 3051 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 3052 } 3053 3054 if (ub->ub_version >= SPA_VERSION_FEATURES) { 3055 nvlist_t *features; 3056 3057 /* 3058 * If we weren't able to find what's necessary for reading the 3059 * MOS in the label, return failure. 3060 */ 3061 if (label == NULL) { 3062 spa_load_failed(spa, "label config unavailable"); 3063 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 3064 ENXIO)); 3065 } 3066 3067 if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_FEATURES_FOR_READ, 3068 &features) != 0) { 3069 nvlist_free(label); 3070 spa_load_failed(spa, "invalid label: '%s' missing", 3071 ZPOOL_CONFIG_FEATURES_FOR_READ); 3072 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 3073 ENXIO)); 3074 } 3075 3076 /* 3077 * Update our in-core representation with the definitive values 3078 * from the label. 3079 */ 3080 nvlist_free(spa->spa_label_features); 3081 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 3082 } 3083 3084 nvlist_free(label); 3085 3086 /* 3087 * Look through entries in the label nvlist's features_for_read. If 3088 * there is a feature listed there which we don't understand then we 3089 * cannot open a pool. 3090 */ 3091 if (ub->ub_version >= SPA_VERSION_FEATURES) { 3092 nvlist_t *unsup_feat; 3093 3094 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 3095 0); 3096 3097 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 3098 NULL); nvp != NULL; 3099 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 3100 if (!zfeature_is_supported(nvpair_name(nvp))) { 3101 VERIFY(nvlist_add_string(unsup_feat, 3102 nvpair_name(nvp), "") == 0); 3103 } 3104 } 3105 3106 if (!nvlist_empty(unsup_feat)) { 3107 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 3108 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 3109 nvlist_free(unsup_feat); 3110 spa_load_failed(spa, "some features are unsupported"); 3111 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 3112 ENOTSUP)); 3113 } 3114 3115 nvlist_free(unsup_feat); 3116 } 3117 3118 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 3119 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3120 spa_try_repair(spa, spa->spa_config); 3121 spa_config_exit(spa, SCL_ALL, FTAG); 3122 nvlist_free(spa->spa_config_splitting); 3123 spa->spa_config_splitting = NULL; 3124 } 3125 3126 /* 3127 * Initialize internal SPA structures. 3128 */ 3129 spa_ld_select_uberblock_done(spa, ub); 3130 3131 return (0); 3132 } 3133 3134 static int 3135 spa_ld_open_rootbp(spa_t *spa) 3136 { 3137 int error = 0; 3138 vdev_t *rvd = spa->spa_root_vdev; 3139 3140 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 3141 if (error != 0) { 3142 spa_load_failed(spa, "unable to open rootbp in dsl_pool_init " 3143 "[error=%d]", error); 3144 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3145 } 3146 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 3147 3148 return (0); 3149 } 3150 3151 static int 3152 spa_ld_trusted_config(spa_t *spa, spa_import_type_t type, 3153 boolean_t reloading) 3154 { 3155 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 3156 nvlist_t *nv, *mos_config, *policy; 3157 int error = 0, copy_error; 3158 uint64_t healthy_tvds, healthy_tvds_mos; 3159 uint64_t mos_config_txg; 3160 3161 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object, B_TRUE) 3162 != 0) 3163 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3164 3165 /* 3166 * If we're assembling a pool from a split, the config provided is 3167 * already trusted so there is nothing to do. 3168 */ 3169 if (type == SPA_IMPORT_ASSEMBLE) 3170 return (0); 3171 3172 healthy_tvds = spa_healthy_core_tvds(spa); 3173 3174 if (load_nvlist(spa, spa->spa_config_object, &mos_config) 3175 != 0) { 3176 spa_load_failed(spa, "unable to retrieve MOS config"); 3177 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3178 } 3179 3180 /* 3181 * If we are doing an open, pool owner wasn't verified yet, thus do 3182 * the verification here. 3183 */ 3184 if (spa->spa_load_state == SPA_LOAD_OPEN) { 3185 error = spa_verify_host(spa, mos_config); 3186 if (error != 0) { 3187 nvlist_free(mos_config); 3188 return (error); 3189 } 3190 } 3191 3192 nv = fnvlist_lookup_nvlist(mos_config, ZPOOL_CONFIG_VDEV_TREE); 3193 3194 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3195 3196 /* 3197 * Build a new vdev tree from the trusted config 3198 */ 3199 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 3200 3201 /* 3202 * Vdev paths in the MOS may be obsolete. If the untrusted config was 3203 * obtained by scanning /dev/dsk, then it will have the right vdev 3204 * paths. We update the trusted MOS config with this information. 3205 * We first try to copy the paths with vdev_copy_path_strict, which 3206 * succeeds only when both configs have exactly the same vdev tree. 3207 * If that fails, we fall back to a more flexible method that has a 3208 * best effort policy. 3209 */ 3210 copy_error = vdev_copy_path_strict(rvd, mrvd); 3211 if (copy_error != 0 || spa_load_print_vdev_tree) { 3212 spa_load_note(spa, "provided vdev tree:"); 3213 vdev_dbgmsg_print_tree(rvd, 2); 3214 spa_load_note(spa, "MOS vdev tree:"); 3215 vdev_dbgmsg_print_tree(mrvd, 2); 3216 } 3217 if (copy_error != 0) { 3218 spa_load_note(spa, "vdev_copy_path_strict failed, falling " 3219 "back to vdev_copy_path_relaxed"); 3220 vdev_copy_path_relaxed(rvd, mrvd); 3221 } 3222 3223 vdev_close(rvd); 3224 vdev_free(rvd); 3225 spa->spa_root_vdev = mrvd; 3226 rvd = mrvd; 3227 spa_config_exit(spa, SCL_ALL, FTAG); 3228 3229 /* 3230 * We will use spa_config if we decide to reload the spa or if spa_load 3231 * fails and we rewind. We must thus regenerate the config using the 3232 * MOS information with the updated paths. ZPOOL_LOAD_POLICY is used to 3233 * pass settings on how to load the pool and is not stored in the MOS. 3234 * We copy it over to our new, trusted config. 3235 */ 3236 mos_config_txg = fnvlist_lookup_uint64(mos_config, 3237 ZPOOL_CONFIG_POOL_TXG); 3238 nvlist_free(mos_config); 3239 mos_config = spa_config_generate(spa, NULL, mos_config_txg, B_FALSE); 3240 if (nvlist_lookup_nvlist(spa->spa_config, ZPOOL_LOAD_POLICY, 3241 &policy) == 0) 3242 fnvlist_add_nvlist(mos_config, ZPOOL_LOAD_POLICY, policy); 3243 spa_config_set(spa, mos_config); 3244 spa->spa_config_source = SPA_CONFIG_SRC_MOS; 3245 3246 /* 3247 * Now that we got the config from the MOS, we should be more strict 3248 * in checking blkptrs and can make assumptions about the consistency 3249 * of the vdev tree. spa_trust_config must be set to true before opening 3250 * vdevs in order for them to be writeable. 3251 */ 3252 spa->spa_trust_config = B_TRUE; 3253 3254 /* 3255 * Open and validate the new vdev tree 3256 */ 3257 error = spa_ld_open_vdevs(spa); 3258 if (error != 0) 3259 return (error); 3260 3261 error = spa_ld_validate_vdevs(spa); 3262 if (error != 0) 3263 return (error); 3264 3265 if (copy_error != 0 || spa_load_print_vdev_tree) { 3266 spa_load_note(spa, "final vdev tree:"); 3267 vdev_dbgmsg_print_tree(rvd, 2); 3268 } 3269 3270 if (spa->spa_load_state != SPA_LOAD_TRYIMPORT && 3271 !spa->spa_extreme_rewind && zfs_max_missing_tvds == 0) { 3272 /* 3273 * Sanity check to make sure that we are indeed loading the 3274 * latest uberblock. If we missed SPA_SYNC_MIN_VDEVS tvds 3275 * in the config provided and they happened to be the only ones 3276 * to have the latest uberblock, we could involuntarily perform 3277 * an extreme rewind. 3278 */ 3279 healthy_tvds_mos = spa_healthy_core_tvds(spa); 3280 if (healthy_tvds_mos - healthy_tvds >= 3281 SPA_SYNC_MIN_VDEVS) { 3282 spa_load_note(spa, "config provided misses too many " 3283 "top-level vdevs compared to MOS (%lld vs %lld). ", 3284 (u_longlong_t)healthy_tvds, 3285 (u_longlong_t)healthy_tvds_mos); 3286 spa_load_note(spa, "vdev tree:"); 3287 vdev_dbgmsg_print_tree(rvd, 2); 3288 if (reloading) { 3289 spa_load_failed(spa, "config was already " 3290 "provided from MOS. Aborting."); 3291 return (spa_vdev_err(rvd, 3292 VDEV_AUX_CORRUPT_DATA, EIO)); 3293 } 3294 spa_load_note(spa, "spa must be reloaded using MOS " 3295 "config"); 3296 return (SET_ERROR(EAGAIN)); 3297 } 3298 } 3299 3300 error = spa_check_for_missing_logs(spa); 3301 if (error != 0) 3302 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 3303 3304 if (rvd->vdev_guid_sum != spa->spa_uberblock.ub_guid_sum) { 3305 spa_load_failed(spa, "uberblock guid sum doesn't match MOS " 3306 "guid sum (%llu != %llu)", 3307 (u_longlong_t)spa->spa_uberblock.ub_guid_sum, 3308 (u_longlong_t)rvd->vdev_guid_sum); 3309 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 3310 ENXIO)); 3311 } 3312 3313 return (0); 3314 } 3315 3316 static int 3317 spa_ld_open_indirect_vdev_metadata(spa_t *spa) 3318 { 3319 int error = 0; 3320 vdev_t *rvd = spa->spa_root_vdev; 3321 3322 /* 3323 * Everything that we read before spa_remove_init() must be stored 3324 * on concreted vdevs. Therefore we do this as early as possible. 3325 */ 3326 error = spa_remove_init(spa); 3327 if (error != 0) { 3328 spa_load_failed(spa, "spa_remove_init failed [error=%d]", 3329 error); 3330 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3331 } 3332 3333 /* 3334 * Retrieve information needed to condense indirect vdev mappings. 3335 */ 3336 error = spa_condense_init(spa); 3337 if (error != 0) { 3338 spa_load_failed(spa, "spa_condense_init failed [error=%d]", 3339 error); 3340 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, error)); 3341 } 3342 3343 return (0); 3344 } 3345 3346 static int 3347 spa_ld_check_features(spa_t *spa, boolean_t *missing_feat_writep) 3348 { 3349 int error = 0; 3350 vdev_t *rvd = spa->spa_root_vdev; 3351 3352 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 3353 boolean_t missing_feat_read = B_FALSE; 3354 nvlist_t *unsup_feat, *enabled_feat; 3355 3356 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 3357 &spa->spa_feat_for_read_obj, B_TRUE) != 0) { 3358 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3359 } 3360 3361 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 3362 &spa->spa_feat_for_write_obj, B_TRUE) != 0) { 3363 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3364 } 3365 3366 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 3367 &spa->spa_feat_desc_obj, B_TRUE) != 0) { 3368 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3369 } 3370 3371 enabled_feat = fnvlist_alloc(); 3372 unsup_feat = fnvlist_alloc(); 3373 3374 if (!spa_features_check(spa, B_FALSE, 3375 unsup_feat, enabled_feat)) 3376 missing_feat_read = B_TRUE; 3377 3378 if (spa_writeable(spa) || 3379 spa->spa_load_state == SPA_LOAD_TRYIMPORT) { 3380 if (!spa_features_check(spa, B_TRUE, 3381 unsup_feat, enabled_feat)) { 3382 *missing_feat_writep = B_TRUE; 3383 } 3384 } 3385 3386 fnvlist_add_nvlist(spa->spa_load_info, 3387 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 3388 3389 if (!nvlist_empty(unsup_feat)) { 3390 fnvlist_add_nvlist(spa->spa_load_info, 3391 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 3392 } 3393 3394 fnvlist_free(enabled_feat); 3395 fnvlist_free(unsup_feat); 3396 3397 if (!missing_feat_read) { 3398 fnvlist_add_boolean(spa->spa_load_info, 3399 ZPOOL_CONFIG_CAN_RDONLY); 3400 } 3401 3402 /* 3403 * If the state is SPA_LOAD_TRYIMPORT, our objective is 3404 * twofold: to determine whether the pool is available for 3405 * import in read-write mode and (if it is not) whether the 3406 * pool is available for import in read-only mode. If the pool 3407 * is available for import in read-write mode, it is displayed 3408 * as available in userland; if it is not available for import 3409 * in read-only mode, it is displayed as unavailable in 3410 * userland. If the pool is available for import in read-only 3411 * mode but not read-write mode, it is displayed as unavailable 3412 * in userland with a special note that the pool is actually 3413 * available for open in read-only mode. 3414 * 3415 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 3416 * missing a feature for write, we must first determine whether 3417 * the pool can be opened read-only before returning to 3418 * userland in order to know whether to display the 3419 * abovementioned note. 3420 */ 3421 if (missing_feat_read || (*missing_feat_writep && 3422 spa_writeable(spa))) { 3423 spa_load_failed(spa, "pool uses unsupported features"); 3424 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 3425 ENOTSUP)); 3426 } 3427 3428 /* 3429 * Load refcounts for ZFS features from disk into an in-memory 3430 * cache during SPA initialization. 3431 */ 3432 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 3433 uint64_t refcount; 3434 3435 error = feature_get_refcount_from_disk(spa, 3436 &spa_feature_table[i], &refcount); 3437 if (error == 0) { 3438 spa->spa_feat_refcount_cache[i] = refcount; 3439 } else if (error == ENOTSUP) { 3440 spa->spa_feat_refcount_cache[i] = 3441 SPA_FEATURE_DISABLED; 3442 } else { 3443 spa_load_failed(spa, "error getting refcount " 3444 "for feature %s [error=%d]", 3445 spa_feature_table[i].fi_guid, error); 3446 return (spa_vdev_err(rvd, 3447 VDEV_AUX_CORRUPT_DATA, EIO)); 3448 } 3449 } 3450 } 3451 3452 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) { 3453 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG, 3454 &spa->spa_feat_enabled_txg_obj, B_TRUE) != 0) 3455 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3456 } 3457 3458 /* 3459 * Encryption was added before bookmark_v2, even though bookmark_v2 3460 * is now a dependency. If this pool has encryption enabled without 3461 * bookmark_v2, trigger an errata message. 3462 */ 3463 if (spa_feature_is_enabled(spa, SPA_FEATURE_ENCRYPTION) && 3464 !spa_feature_is_enabled(spa, SPA_FEATURE_BOOKMARK_V2)) { 3465 spa->spa_errata = ZPOOL_ERRATA_ZOL_8308_ENCRYPTION; 3466 } 3467 3468 return (0); 3469 } 3470 3471 static int 3472 spa_ld_load_special_directories(spa_t *spa) 3473 { 3474 int error = 0; 3475 vdev_t *rvd = spa->spa_root_vdev; 3476 3477 spa->spa_is_initializing = B_TRUE; 3478 error = dsl_pool_open(spa->spa_dsl_pool); 3479 spa->spa_is_initializing = B_FALSE; 3480 if (error != 0) { 3481 spa_load_failed(spa, "dsl_pool_open failed [error=%d]", error); 3482 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3483 } 3484 3485 return (0); 3486 } 3487 3488 static int 3489 spa_ld_get_props(spa_t *spa) 3490 { 3491 int error = 0; 3492 uint64_t obj; 3493 vdev_t *rvd = spa->spa_root_vdev; 3494 3495 /* Grab the secret checksum salt from the MOS. */ 3496 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 3497 DMU_POOL_CHECKSUM_SALT, 1, 3498 sizeof (spa->spa_cksum_salt.zcs_bytes), 3499 spa->spa_cksum_salt.zcs_bytes); 3500 if (error == ENOENT) { 3501 /* Generate a new salt for subsequent use */ 3502 (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes, 3503 sizeof (spa->spa_cksum_salt.zcs_bytes)); 3504 } else if (error != 0) { 3505 spa_load_failed(spa, "unable to retrieve checksum salt from " 3506 "MOS [error=%d]", error); 3507 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3508 } 3509 3510 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj, B_TRUE) != 0) 3511 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3512 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 3513 if (error != 0) { 3514 spa_load_failed(spa, "error opening deferred-frees bpobj " 3515 "[error=%d]", error); 3516 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3517 } 3518 3519 /* 3520 * Load the bit that tells us to use the new accounting function 3521 * (raid-z deflation). If we have an older pool, this will not 3522 * be present. 3523 */ 3524 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate, B_FALSE); 3525 if (error != 0 && error != ENOENT) 3526 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3527 3528 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 3529 &spa->spa_creation_version, B_FALSE); 3530 if (error != 0 && error != ENOENT) 3531 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3532 3533 /* 3534 * Load the persistent error log. If we have an older pool, this will 3535 * not be present. 3536 */ 3537 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last, 3538 B_FALSE); 3539 if (error != 0 && error != ENOENT) 3540 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3541 3542 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 3543 &spa->spa_errlog_scrub, B_FALSE); 3544 if (error != 0 && error != ENOENT) 3545 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3546 3547 /* 3548 * Load the history object. If we have an older pool, this 3549 * will not be present. 3550 */ 3551 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history, B_FALSE); 3552 if (error != 0 && error != ENOENT) 3553 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3554 3555 /* 3556 * Load the per-vdev ZAP map. If we have an older pool, this will not 3557 * be present; in this case, defer its creation to a later time to 3558 * avoid dirtying the MOS this early / out of sync context. See 3559 * spa_sync_config_object. 3560 */ 3561 3562 /* The sentinel is only available in the MOS config. */ 3563 nvlist_t *mos_config; 3564 if (load_nvlist(spa, spa->spa_config_object, &mos_config) != 0) { 3565 spa_load_failed(spa, "unable to retrieve MOS config"); 3566 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3567 } 3568 3569 error = spa_dir_prop(spa, DMU_POOL_VDEV_ZAP_MAP, 3570 &spa->spa_all_vdev_zaps, B_FALSE); 3571 3572 if (error == ENOENT) { 3573 VERIFY(!nvlist_exists(mos_config, 3574 ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)); 3575 spa->spa_avz_action = AVZ_ACTION_INITIALIZE; 3576 ASSERT0(vdev_count_verify_zaps(spa->spa_root_vdev)); 3577 } else if (error != 0) { 3578 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3579 } else if (!nvlist_exists(mos_config, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)) { 3580 /* 3581 * An older version of ZFS overwrote the sentinel value, so 3582 * we have orphaned per-vdev ZAPs in the MOS. Defer their 3583 * destruction to later; see spa_sync_config_object. 3584 */ 3585 spa->spa_avz_action = AVZ_ACTION_DESTROY; 3586 /* 3587 * We're assuming that no vdevs have had their ZAPs created 3588 * before this. Better be sure of it. 3589 */ 3590 ASSERT0(vdev_count_verify_zaps(spa->spa_root_vdev)); 3591 } 3592 nvlist_free(mos_config); 3593 3594 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3595 3596 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object, 3597 B_FALSE); 3598 if (error && error != ENOENT) 3599 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3600 3601 if (error == 0) { 3602 uint64_t autoreplace; 3603 3604 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 3605 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 3606 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 3607 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 3608 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 3609 spa_prop_find(spa, ZPOOL_PROP_BOOTSIZE, &spa->spa_bootsize); 3610 spa_prop_find(spa, ZPOOL_PROP_MULTIHOST, &spa->spa_multihost); 3611 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 3612 &spa->spa_dedup_ditto); 3613 spa_prop_find(spa, ZPOOL_PROP_AUTOTRIM, &spa->spa_autotrim); 3614 spa->spa_autoreplace = (autoreplace != 0); 3615 } 3616 3617 /* 3618 * If we are importing a pool with missing top-level vdevs, 3619 * we enforce that the pool doesn't panic or get suspended on 3620 * error since the likelihood of missing data is extremely high. 3621 */ 3622 if (spa->spa_missing_tvds > 0 && 3623 spa->spa_failmode != ZIO_FAILURE_MODE_CONTINUE && 3624 spa->spa_load_state != SPA_LOAD_TRYIMPORT) { 3625 spa_load_note(spa, "forcing failmode to 'continue' " 3626 "as some top level vdevs are missing"); 3627 spa->spa_failmode = ZIO_FAILURE_MODE_CONTINUE; 3628 } 3629 3630 return (0); 3631 } 3632 3633 static int 3634 spa_ld_open_aux_vdevs(spa_t *spa, spa_import_type_t type) 3635 { 3636 int error = 0; 3637 vdev_t *rvd = spa->spa_root_vdev; 3638 3639 /* 3640 * If we're assembling the pool from the split-off vdevs of 3641 * an existing pool, we don't want to attach the spares & cache 3642 * devices. 3643 */ 3644 3645 /* 3646 * Load any hot spares for this pool. 3647 */ 3648 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object, 3649 B_FALSE); 3650 if (error != 0 && error != ENOENT) 3651 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3652 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 3653 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 3654 if (load_nvlist(spa, spa->spa_spares.sav_object, 3655 &spa->spa_spares.sav_config) != 0) { 3656 spa_load_failed(spa, "error loading spares nvlist"); 3657 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3658 } 3659 3660 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3661 spa_load_spares(spa); 3662 spa_config_exit(spa, SCL_ALL, FTAG); 3663 } else if (error == 0) { 3664 spa->spa_spares.sav_sync = B_TRUE; 3665 } 3666 3667 /* 3668 * Load any level 2 ARC devices for this pool. 3669 */ 3670 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 3671 &spa->spa_l2cache.sav_object, B_FALSE); 3672 if (error != 0 && error != ENOENT) 3673 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3674 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 3675 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 3676 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 3677 &spa->spa_l2cache.sav_config) != 0) { 3678 spa_load_failed(spa, "error loading l2cache nvlist"); 3679 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3680 } 3681 3682 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3683 spa_load_l2cache(spa); 3684 spa_config_exit(spa, SCL_ALL, FTAG); 3685 } else if (error == 0) { 3686 spa->spa_l2cache.sav_sync = B_TRUE; 3687 } 3688 3689 return (0); 3690 } 3691 3692 static int 3693 spa_ld_load_vdev_metadata(spa_t *spa) 3694 { 3695 int error = 0; 3696 vdev_t *rvd = spa->spa_root_vdev; 3697 3698 /* 3699 * If the 'multihost' property is set, then never allow a pool to 3700 * be imported when the system hostid is zero. The exception to 3701 * this rule is zdb which is always allowed to access pools. 3702 */ 3703 if (spa_multihost(spa) && spa_get_hostid() == 0 && 3704 (spa->spa_import_flags & ZFS_IMPORT_SKIP_MMP) == 0) { 3705 fnvlist_add_uint64(spa->spa_load_info, 3706 ZPOOL_CONFIG_MMP_STATE, MMP_STATE_NO_HOSTID); 3707 return (spa_vdev_err(rvd, VDEV_AUX_ACTIVE, EREMOTEIO)); 3708 } 3709 3710 /* 3711 * If the 'autoreplace' property is set, then post a resource notifying 3712 * the ZFS DE that it should not issue any faults for unopenable 3713 * devices. We also iterate over the vdevs, and post a sysevent for any 3714 * unopenable vdevs so that the normal autoreplace handler can take 3715 * over. 3716 */ 3717 if (spa->spa_autoreplace && spa->spa_load_state != SPA_LOAD_TRYIMPORT) { 3718 spa_check_removed(spa->spa_root_vdev); 3719 /* 3720 * For the import case, this is done in spa_import(), because 3721 * at this point we're using the spare definitions from 3722 * the MOS config, not necessarily from the userland config. 3723 */ 3724 if (spa->spa_load_state != SPA_LOAD_IMPORT) { 3725 spa_aux_check_removed(&spa->spa_spares); 3726 spa_aux_check_removed(&spa->spa_l2cache); 3727 } 3728 } 3729 3730 /* 3731 * Load the vdev metadata such as metaslabs, DTLs, spacemap object, etc. 3732 */ 3733 error = vdev_load(rvd); 3734 if (error != 0) { 3735 spa_load_failed(spa, "vdev_load failed [error=%d]", error); 3736 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, error)); 3737 } 3738 3739 error = spa_ld_log_spacemaps(spa); 3740 if (error != 0) { 3741 spa_load_failed(spa, "spa_ld_log_sm_data failed [error=%d]", 3742 error); 3743 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, error)); 3744 } 3745 3746 /* 3747 * Propagate the leaf DTLs we just loaded all the way up the vdev tree. 3748 */ 3749 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3750 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 3751 spa_config_exit(spa, SCL_ALL, FTAG); 3752 3753 return (0); 3754 } 3755 3756 static int 3757 spa_ld_load_dedup_tables(spa_t *spa) 3758 { 3759 int error = 0; 3760 vdev_t *rvd = spa->spa_root_vdev; 3761 3762 error = ddt_load(spa); 3763 if (error != 0) { 3764 spa_load_failed(spa, "ddt_load failed [error=%d]", error); 3765 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 3766 } 3767 3768 return (0); 3769 } 3770 3771 static int 3772 spa_ld_verify_logs(spa_t *spa, spa_import_type_t type, char **ereport) 3773 { 3774 vdev_t *rvd = spa->spa_root_vdev; 3775 3776 if (type != SPA_IMPORT_ASSEMBLE && spa_writeable(spa)) { 3777 boolean_t missing = spa_check_logs(spa); 3778 if (missing) { 3779 if (spa->spa_missing_tvds != 0) { 3780 spa_load_note(spa, "spa_check_logs failed " 3781 "so dropping the logs"); 3782 } else { 3783 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 3784 spa_load_failed(spa, "spa_check_logs failed"); 3785 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, 3786 ENXIO)); 3787 } 3788 } 3789 } 3790 3791 return (0); 3792 } 3793 3794 static int 3795 spa_ld_verify_pool_data(spa_t *spa) 3796 { 3797 int error = 0; 3798 vdev_t *rvd = spa->spa_root_vdev; 3799 3800 /* 3801 * We've successfully opened the pool, verify that we're ready 3802 * to start pushing transactions. 3803 */ 3804 if (spa->spa_load_state != SPA_LOAD_TRYIMPORT) { 3805 error = spa_load_verify(spa); 3806 if (error != 0) { 3807 spa_load_failed(spa, "spa_load_verify failed " 3808 "[error=%d]", error); 3809 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 3810 error)); 3811 } 3812 } 3813 3814 return (0); 3815 } 3816 3817 static void 3818 spa_ld_claim_log_blocks(spa_t *spa) 3819 { 3820 dmu_tx_t *tx; 3821 dsl_pool_t *dp = spa_get_dsl(spa); 3822 3823 /* 3824 * Claim log blocks that haven't been committed yet. 3825 * This must all happen in a single txg. 3826 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 3827 * invoked from zil_claim_log_block()'s i/o done callback. 3828 * Price of rollback is that we abandon the log. 3829 */ 3830 spa->spa_claiming = B_TRUE; 3831 3832 tx = dmu_tx_create_assigned(dp, spa_first_txg(spa)); 3833 (void) dmu_objset_find_dp(dp, dp->dp_root_dir_obj, 3834 zil_claim, tx, DS_FIND_CHILDREN); 3835 dmu_tx_commit(tx); 3836 3837 spa->spa_claiming = B_FALSE; 3838 3839 spa_set_log_state(spa, SPA_LOG_GOOD); 3840 } 3841 3842 static void 3843 spa_ld_check_for_config_update(spa_t *spa, uint64_t config_cache_txg, 3844 boolean_t update_config_cache) 3845 { 3846 vdev_t *rvd = spa->spa_root_vdev; 3847 int need_update = B_FALSE; 3848 3849 /* 3850 * If the config cache is stale, or we have uninitialized 3851 * metaslabs (see spa_vdev_add()), then update the config. 3852 * 3853 * If this is a verbatim import, trust the current 3854 * in-core spa_config and update the disk labels. 3855 */ 3856 if (update_config_cache || config_cache_txg != spa->spa_config_txg || 3857 spa->spa_load_state == SPA_LOAD_IMPORT || 3858 spa->spa_load_state == SPA_LOAD_RECOVER || 3859 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 3860 need_update = B_TRUE; 3861 3862 for (int c = 0; c < rvd->vdev_children; c++) 3863 if (rvd->vdev_child[c]->vdev_ms_array == 0) 3864 need_update = B_TRUE; 3865 3866 /* 3867 * Update the config cache asychronously in case we're the 3868 * root pool, in which case the config cache isn't writable yet. 3869 */ 3870 if (need_update) 3871 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 3872 } 3873 3874 static void 3875 spa_ld_prepare_for_reload(spa_t *spa) 3876 { 3877 int mode = spa->spa_mode; 3878 int async_suspended = spa->spa_async_suspended; 3879 3880 spa_unload(spa); 3881 spa_deactivate(spa); 3882 spa_activate(spa, mode); 3883 3884 /* 3885 * We save the value of spa_async_suspended as it gets reset to 0 by 3886 * spa_unload(). We want to restore it back to the original value before 3887 * returning as we might be calling spa_async_resume() later. 3888 */ 3889 spa->spa_async_suspended = async_suspended; 3890 } 3891 3892 static int 3893 spa_ld_read_checkpoint_txg(spa_t *spa) 3894 { 3895 uberblock_t checkpoint; 3896 int error = 0; 3897 3898 ASSERT0(spa->spa_checkpoint_txg); 3899 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 3900 3901 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 3902 DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t), 3903 sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint); 3904 3905 if (error == ENOENT) 3906 return (0); 3907 3908 if (error != 0) 3909 return (error); 3910 3911 ASSERT3U(checkpoint.ub_txg, !=, 0); 3912 ASSERT3U(checkpoint.ub_checkpoint_txg, !=, 0); 3913 ASSERT3U(checkpoint.ub_timestamp, !=, 0); 3914 spa->spa_checkpoint_txg = checkpoint.ub_txg; 3915 spa->spa_checkpoint_info.sci_timestamp = checkpoint.ub_timestamp; 3916 3917 return (0); 3918 } 3919 3920 static int 3921 spa_ld_mos_init(spa_t *spa, spa_import_type_t type) 3922 { 3923 int error = 0; 3924 3925 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 3926 ASSERT(spa->spa_config_source != SPA_CONFIG_SRC_NONE); 3927 3928 /* 3929 * Never trust the config that is provided unless we are assembling 3930 * a pool following a split. 3931 * This means don't trust blkptrs and the vdev tree in general. This 3932 * also effectively puts the spa in read-only mode since 3933 * spa_writeable() checks for spa_trust_config to be true. 3934 * We will later load a trusted config from the MOS. 3935 */ 3936 if (type != SPA_IMPORT_ASSEMBLE) 3937 spa->spa_trust_config = B_FALSE; 3938 3939 /* 3940 * Parse the config provided to create a vdev tree. 3941 */ 3942 error = spa_ld_parse_config(spa, type); 3943 if (error != 0) 3944 return (error); 3945 3946 spa_import_progress_add(spa); 3947 3948 /* 3949 * Now that we have the vdev tree, try to open each vdev. This involves 3950 * opening the underlying physical device, retrieving its geometry and 3951 * probing the vdev with a dummy I/O. The state of each vdev will be set 3952 * based on the success of those operations. After this we'll be ready 3953 * to read from the vdevs. 3954 */ 3955 error = spa_ld_open_vdevs(spa); 3956 if (error != 0) 3957 return (error); 3958 3959 /* 3960 * Read the label of each vdev and make sure that the GUIDs stored 3961 * there match the GUIDs in the config provided. 3962 * If we're assembling a new pool that's been split off from an 3963 * existing pool, the labels haven't yet been updated so we skip 3964 * validation for now. 3965 */ 3966 if (type != SPA_IMPORT_ASSEMBLE) { 3967 error = spa_ld_validate_vdevs(spa); 3968 if (error != 0) 3969 return (error); 3970 } 3971 3972 /* 3973 * Read all vdev labels to find the best uberblock (i.e. latest, 3974 * unless spa_load_max_txg is set) and store it in spa_uberblock. We 3975 * get the list of features required to read blkptrs in the MOS from 3976 * the vdev label with the best uberblock and verify that our version 3977 * of zfs supports them all. 3978 */ 3979 error = spa_ld_select_uberblock(spa, type); 3980 if (error != 0) 3981 return (error); 3982 3983 /* 3984 * Pass that uberblock to the dsl_pool layer which will open the root 3985 * blkptr. This blkptr points to the latest version of the MOS and will 3986 * allow us to read its contents. 3987 */ 3988 error = spa_ld_open_rootbp(spa); 3989 if (error != 0) 3990 return (error); 3991 3992 return (0); 3993 } 3994 3995 static int 3996 spa_ld_checkpoint_rewind(spa_t *spa) 3997 { 3998 uberblock_t checkpoint; 3999 int error = 0; 4000 4001 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 4002 ASSERT(spa->spa_import_flags & ZFS_IMPORT_CHECKPOINT); 4003 4004 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 4005 DMU_POOL_ZPOOL_CHECKPOINT, sizeof (uint64_t), 4006 sizeof (uberblock_t) / sizeof (uint64_t), &checkpoint); 4007 4008 if (error != 0) { 4009 spa_load_failed(spa, "unable to retrieve checkpointed " 4010 "uberblock from the MOS config [error=%d]", error); 4011 4012 if (error == ENOENT) 4013 error = ZFS_ERR_NO_CHECKPOINT; 4014 4015 return (error); 4016 } 4017 4018 ASSERT3U(checkpoint.ub_txg, <, spa->spa_uberblock.ub_txg); 4019 ASSERT3U(checkpoint.ub_txg, ==, checkpoint.ub_checkpoint_txg); 4020 4021 /* 4022 * We need to update the txg and timestamp of the checkpointed 4023 * uberblock to be higher than the latest one. This ensures that 4024 * the checkpointed uberblock is selected if we were to close and 4025 * reopen the pool right after we've written it in the vdev labels. 4026 * (also see block comment in vdev_uberblock_compare) 4027 */ 4028 checkpoint.ub_txg = spa->spa_uberblock.ub_txg + 1; 4029 checkpoint.ub_timestamp = gethrestime_sec(); 4030 4031 /* 4032 * Set current uberblock to be the checkpointed uberblock. 4033 */ 4034 spa->spa_uberblock = checkpoint; 4035 4036 /* 4037 * If we are doing a normal rewind, then the pool is open for 4038 * writing and we sync the "updated" checkpointed uberblock to 4039 * disk. Once this is done, we've basically rewound the whole 4040 * pool and there is no way back. 4041 * 4042 * There are cases when we don't want to attempt and sync the 4043 * checkpointed uberblock to disk because we are opening a 4044 * pool as read-only. Specifically, verifying the checkpointed 4045 * state with zdb, and importing the checkpointed state to get 4046 * a "preview" of its content. 4047 */ 4048 if (spa_writeable(spa)) { 4049 vdev_t *rvd = spa->spa_root_vdev; 4050 4051 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4052 vdev_t *svd[SPA_SYNC_MIN_VDEVS] = { NULL }; 4053 int svdcount = 0; 4054 int children = rvd->vdev_children; 4055 int c0 = spa_get_random(children); 4056 4057 for (int c = 0; c < children; c++) { 4058 vdev_t *vd = rvd->vdev_child[(c0 + c) % children]; 4059 4060 /* Stop when revisiting the first vdev */ 4061 if (c > 0 && svd[0] == vd) 4062 break; 4063 4064 if (vd->vdev_ms_array == 0 || vd->vdev_islog || 4065 !vdev_is_concrete(vd)) 4066 continue; 4067 4068 svd[svdcount++] = vd; 4069 if (svdcount == SPA_SYNC_MIN_VDEVS) 4070 break; 4071 } 4072 error = vdev_config_sync(svd, svdcount, spa->spa_first_txg); 4073 if (error == 0) 4074 spa->spa_last_synced_guid = rvd->vdev_guid; 4075 spa_config_exit(spa, SCL_ALL, FTAG); 4076 4077 if (error != 0) { 4078 spa_load_failed(spa, "failed to write checkpointed " 4079 "uberblock to the vdev labels [error=%d]", error); 4080 return (error); 4081 } 4082 } 4083 4084 return (0); 4085 } 4086 4087 static int 4088 spa_ld_mos_with_trusted_config(spa_t *spa, spa_import_type_t type, 4089 boolean_t *update_config_cache) 4090 { 4091 int error; 4092 4093 /* 4094 * Parse the config for pool, open and validate vdevs, 4095 * select an uberblock, and use that uberblock to open 4096 * the MOS. 4097 */ 4098 error = spa_ld_mos_init(spa, type); 4099 if (error != 0) 4100 return (error); 4101 4102 /* 4103 * Retrieve the trusted config stored in the MOS and use it to create 4104 * a new, exact version of the vdev tree, then reopen all vdevs. 4105 */ 4106 error = spa_ld_trusted_config(spa, type, B_FALSE); 4107 if (error == EAGAIN) { 4108 if (update_config_cache != NULL) 4109 *update_config_cache = B_TRUE; 4110 4111 /* 4112 * Redo the loading process with the trusted config if it is 4113 * too different from the untrusted config. 4114 */ 4115 spa_ld_prepare_for_reload(spa); 4116 spa_load_note(spa, "RELOADING"); 4117 error = spa_ld_mos_init(spa, type); 4118 if (error != 0) 4119 return (error); 4120 4121 error = spa_ld_trusted_config(spa, type, B_TRUE); 4122 if (error != 0) 4123 return (error); 4124 4125 } else if (error != 0) { 4126 return (error); 4127 } 4128 4129 return (0); 4130 } 4131 4132 /* 4133 * Load an existing storage pool, using the config provided. This config 4134 * describes which vdevs are part of the pool and is later validated against 4135 * partial configs present in each vdev's label and an entire copy of the 4136 * config stored in the MOS. 4137 */ 4138 static int 4139 spa_load_impl(spa_t *spa, spa_import_type_t type, char **ereport) 4140 { 4141 int error = 0; 4142 boolean_t missing_feat_write = B_FALSE; 4143 boolean_t checkpoint_rewind = 4144 (spa->spa_import_flags & ZFS_IMPORT_CHECKPOINT); 4145 boolean_t update_config_cache = B_FALSE; 4146 4147 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 4148 ASSERT(spa->spa_config_source != SPA_CONFIG_SRC_NONE); 4149 4150 spa_load_note(spa, "LOADING"); 4151 4152 error = spa_ld_mos_with_trusted_config(spa, type, &update_config_cache); 4153 if (error != 0) 4154 return (error); 4155 4156 /* 4157 * If we are rewinding to the checkpoint then we need to repeat 4158 * everything we've done so far in this function but this time 4159 * selecting the checkpointed uberblock and using that to open 4160 * the MOS. 4161 */ 4162 if (checkpoint_rewind) { 4163 /* 4164 * If we are rewinding to the checkpoint update config cache 4165 * anyway. 4166 */ 4167 update_config_cache = B_TRUE; 4168 4169 /* 4170 * Extract the checkpointed uberblock from the current MOS 4171 * and use this as the pool's uberblock from now on. If the 4172 * pool is imported as writeable we also write the checkpoint 4173 * uberblock to the labels, making the rewind permanent. 4174 */ 4175 error = spa_ld_checkpoint_rewind(spa); 4176 if (error != 0) 4177 return (error); 4178 4179 /* 4180 * Redo the loading process process again with the 4181 * checkpointed uberblock. 4182 */ 4183 spa_ld_prepare_for_reload(spa); 4184 spa_load_note(spa, "LOADING checkpointed uberblock"); 4185 error = spa_ld_mos_with_trusted_config(spa, type, NULL); 4186 if (error != 0) 4187 return (error); 4188 } 4189 4190 /* 4191 * Retrieve the checkpoint txg if the pool has a checkpoint. 4192 */ 4193 error = spa_ld_read_checkpoint_txg(spa); 4194 if (error != 0) 4195 return (error); 4196 4197 /* 4198 * Retrieve the mapping of indirect vdevs. Those vdevs were removed 4199 * from the pool and their contents were re-mapped to other vdevs. Note 4200 * that everything that we read before this step must have been 4201 * rewritten on concrete vdevs after the last device removal was 4202 * initiated. Otherwise we could be reading from indirect vdevs before 4203 * we have loaded their mappings. 4204 */ 4205 error = spa_ld_open_indirect_vdev_metadata(spa); 4206 if (error != 0) 4207 return (error); 4208 4209 /* 4210 * Retrieve the full list of active features from the MOS and check if 4211 * they are all supported. 4212 */ 4213 error = spa_ld_check_features(spa, &missing_feat_write); 4214 if (error != 0) 4215 return (error); 4216 4217 /* 4218 * Load several special directories from the MOS needed by the dsl_pool 4219 * layer. 4220 */ 4221 error = spa_ld_load_special_directories(spa); 4222 if (error != 0) 4223 return (error); 4224 4225 /* 4226 * Retrieve pool properties from the MOS. 4227 */ 4228 error = spa_ld_get_props(spa); 4229 if (error != 0) 4230 return (error); 4231 4232 /* 4233 * Retrieve the list of auxiliary devices - cache devices and spares - 4234 * and open them. 4235 */ 4236 error = spa_ld_open_aux_vdevs(spa, type); 4237 if (error != 0) 4238 return (error); 4239 4240 /* 4241 * Load the metadata for all vdevs. Also check if unopenable devices 4242 * should be autoreplaced. 4243 */ 4244 error = spa_ld_load_vdev_metadata(spa); 4245 if (error != 0) 4246 return (error); 4247 4248 error = spa_ld_load_dedup_tables(spa); 4249 if (error != 0) 4250 return (error); 4251 4252 /* 4253 * Verify the logs now to make sure we don't have any unexpected errors 4254 * when we claim log blocks later. 4255 */ 4256 error = spa_ld_verify_logs(spa, type, ereport); 4257 if (error != 0) 4258 return (error); 4259 4260 if (missing_feat_write) { 4261 ASSERT(spa->spa_load_state == SPA_LOAD_TRYIMPORT); 4262 4263 /* 4264 * At this point, we know that we can open the pool in 4265 * read-only mode but not read-write mode. We now have enough 4266 * information and can return to userland. 4267 */ 4268 return (spa_vdev_err(spa->spa_root_vdev, VDEV_AUX_UNSUP_FEAT, 4269 ENOTSUP)); 4270 } 4271 4272 /* 4273 * Traverse the last txgs to make sure the pool was left off in a safe 4274 * state. When performing an extreme rewind, we verify the whole pool, 4275 * which can take a very long time. 4276 */ 4277 error = spa_ld_verify_pool_data(spa); 4278 if (error != 0) 4279 return (error); 4280 4281 /* 4282 * Calculate the deflated space for the pool. This must be done before 4283 * we write anything to the pool because we'd need to update the space 4284 * accounting using the deflated sizes. 4285 */ 4286 spa_update_dspace(spa); 4287 4288 /* 4289 * We have now retrieved all the information we needed to open the 4290 * pool. If we are importing the pool in read-write mode, a few 4291 * additional steps must be performed to finish the import. 4292 */ 4293 if (spa_writeable(spa) && (spa->spa_load_state == SPA_LOAD_RECOVER || 4294 spa->spa_load_max_txg == UINT64_MAX)) { 4295 uint64_t config_cache_txg = spa->spa_config_txg; 4296 4297 ASSERT(spa->spa_load_state != SPA_LOAD_TRYIMPORT); 4298 4299 /* 4300 * In case of a checkpoint rewind, log the original txg 4301 * of the checkpointed uberblock. 4302 */ 4303 if (checkpoint_rewind) { 4304 spa_history_log_internal(spa, "checkpoint rewind", 4305 NULL, "rewound state to txg=%llu", 4306 (u_longlong_t)spa->spa_uberblock.ub_checkpoint_txg); 4307 } 4308 4309 /* 4310 * Traverse the ZIL and claim all blocks. 4311 */ 4312 spa_ld_claim_log_blocks(spa); 4313 4314 /* 4315 * Kick-off the syncing thread. 4316 */ 4317 spa->spa_sync_on = B_TRUE; 4318 txg_sync_start(spa->spa_dsl_pool); 4319 mmp_thread_start(spa); 4320 4321 /* 4322 * Wait for all claims to sync. We sync up to the highest 4323 * claimed log block birth time so that claimed log blocks 4324 * don't appear to be from the future. spa_claim_max_txg 4325 * will have been set for us by ZIL traversal operations 4326 * performed above. 4327 */ 4328 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 4329 4330 /* 4331 * Check if we need to request an update of the config. On the 4332 * next sync, we would update the config stored in vdev labels 4333 * and the cachefile (by default /etc/zfs/zpool.cache). 4334 */ 4335 spa_ld_check_for_config_update(spa, config_cache_txg, 4336 update_config_cache); 4337 4338 /* 4339 * Check all DTLs to see if anything needs resilvering. 4340 */ 4341 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 4342 vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) 4343 spa_async_request(spa, SPA_ASYNC_RESILVER); 4344 4345 /* 4346 * Log the fact that we booted up (so that we can detect if 4347 * we rebooted in the middle of an operation). 4348 */ 4349 spa_history_log_version(spa, "open"); 4350 4351 spa_restart_removal(spa); 4352 spa_spawn_aux_threads(spa); 4353 4354 /* 4355 * Delete any inconsistent datasets. 4356 * 4357 * Note: 4358 * Since we may be issuing deletes for clones here, 4359 * we make sure to do so after we've spawned all the 4360 * auxiliary threads above (from which the livelist 4361 * deletion zthr is part of). 4362 */ 4363 (void) dmu_objset_find(spa_name(spa), 4364 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 4365 4366 /* 4367 * Clean up any stale temporary dataset userrefs. 4368 */ 4369 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 4370 4371 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4372 vdev_initialize_restart(spa->spa_root_vdev); 4373 vdev_trim_restart(spa->spa_root_vdev); 4374 vdev_autotrim_restart(spa); 4375 spa_config_exit(spa, SCL_CONFIG, FTAG); 4376 } 4377 4378 spa_import_progress_remove(spa); 4379 spa_async_request(spa, SPA_ASYNC_L2CACHE_REBUILD); 4380 4381 spa_load_note(spa, "LOADED"); 4382 4383 return (0); 4384 } 4385 4386 static int 4387 spa_load_retry(spa_t *spa, spa_load_state_t state) 4388 { 4389 int mode = spa->spa_mode; 4390 4391 spa_unload(spa); 4392 spa_deactivate(spa); 4393 4394 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg - 1; 4395 4396 spa_activate(spa, mode); 4397 spa_async_suspend(spa); 4398 4399 spa_load_note(spa, "spa_load_retry: rewind, max txg: %llu", 4400 (u_longlong_t)spa->spa_load_max_txg); 4401 4402 return (spa_load(spa, state, SPA_IMPORT_EXISTING)); 4403 } 4404 4405 /* 4406 * If spa_load() fails this function will try loading prior txg's. If 4407 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 4408 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 4409 * function will not rewind the pool and will return the same error as 4410 * spa_load(). 4411 */ 4412 static int 4413 spa_load_best(spa_t *spa, spa_load_state_t state, uint64_t max_request, 4414 int rewind_flags) 4415 { 4416 nvlist_t *loadinfo = NULL; 4417 nvlist_t *config = NULL; 4418 int load_error, rewind_error; 4419 uint64_t safe_rewind_txg; 4420 uint64_t min_txg; 4421 4422 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 4423 spa->spa_load_max_txg = spa->spa_load_txg; 4424 spa_set_log_state(spa, SPA_LOG_CLEAR); 4425 } else { 4426 spa->spa_load_max_txg = max_request; 4427 if (max_request != UINT64_MAX) 4428 spa->spa_extreme_rewind = B_TRUE; 4429 } 4430 4431 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING); 4432 if (load_error == 0) 4433 return (0); 4434 if (load_error == ZFS_ERR_NO_CHECKPOINT) { 4435 /* 4436 * When attempting checkpoint-rewind on a pool with no 4437 * checkpoint, we should not attempt to load uberblocks 4438 * from previous txgs when spa_load fails. 4439 */ 4440 ASSERT(spa->spa_import_flags & ZFS_IMPORT_CHECKPOINT); 4441 spa_import_progress_remove(spa); 4442 return (load_error); 4443 } 4444 4445 if (spa->spa_root_vdev != NULL) 4446 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4447 4448 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 4449 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 4450 4451 if (rewind_flags & ZPOOL_NEVER_REWIND) { 4452 nvlist_free(config); 4453 spa_import_progress_remove(spa); 4454 return (load_error); 4455 } 4456 4457 if (state == SPA_LOAD_RECOVER) { 4458 /* Price of rolling back is discarding txgs, including log */ 4459 spa_set_log_state(spa, SPA_LOG_CLEAR); 4460 } else { 4461 /* 4462 * If we aren't rolling back save the load info from our first 4463 * import attempt so that we can restore it after attempting 4464 * to rewind. 4465 */ 4466 loadinfo = spa->spa_load_info; 4467 spa->spa_load_info = fnvlist_alloc(); 4468 } 4469 4470 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 4471 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 4472 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 4473 TXG_INITIAL : safe_rewind_txg; 4474 4475 /* 4476 * Continue as long as we're finding errors, we're still within 4477 * the acceptable rewind range, and we're still finding uberblocks 4478 */ 4479 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 4480 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 4481 if (spa->spa_load_max_txg < safe_rewind_txg) 4482 spa->spa_extreme_rewind = B_TRUE; 4483 rewind_error = spa_load_retry(spa, state); 4484 } 4485 4486 spa->spa_extreme_rewind = B_FALSE; 4487 spa->spa_load_max_txg = UINT64_MAX; 4488 4489 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 4490 spa_config_set(spa, config); 4491 else 4492 nvlist_free(config); 4493 4494 if (state == SPA_LOAD_RECOVER) { 4495 ASSERT3P(loadinfo, ==, NULL); 4496 spa_import_progress_remove(spa); 4497 return (rewind_error); 4498 } else { 4499 /* Store the rewind info as part of the initial load info */ 4500 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 4501 spa->spa_load_info); 4502 4503 /* Restore the initial load info */ 4504 fnvlist_free(spa->spa_load_info); 4505 spa->spa_load_info = loadinfo; 4506 4507 spa_import_progress_remove(spa); 4508 return (load_error); 4509 } 4510 } 4511 4512 /* 4513 * Pool Open/Import 4514 * 4515 * The import case is identical to an open except that the configuration is sent 4516 * down from userland, instead of grabbed from the configuration cache. For the 4517 * case of an open, the pool configuration will exist in the 4518 * POOL_STATE_UNINITIALIZED state. 4519 * 4520 * The stats information (gen/count/ustats) is used to gather vdev statistics at 4521 * the same time open the pool, without having to keep around the spa_t in some 4522 * ambiguous state. 4523 */ 4524 static int 4525 spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 4526 nvlist_t **config) 4527 { 4528 spa_t *spa; 4529 spa_load_state_t state = SPA_LOAD_OPEN; 4530 int error; 4531 int locked = B_FALSE; 4532 4533 *spapp = NULL; 4534 4535 /* 4536 * As disgusting as this is, we need to support recursive calls to this 4537 * function because dsl_dir_open() is called during spa_load(), and ends 4538 * up calling spa_open() again. The real fix is to figure out how to 4539 * avoid dsl_dir_open() calling this in the first place. 4540 */ 4541 if (mutex_owner(&spa_namespace_lock) != curthread) { 4542 mutex_enter(&spa_namespace_lock); 4543 locked = B_TRUE; 4544 } 4545 4546 if ((spa = spa_lookup(pool)) == NULL) { 4547 if (locked) 4548 mutex_exit(&spa_namespace_lock); 4549 return (SET_ERROR(ENOENT)); 4550 } 4551 4552 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 4553 zpool_load_policy_t policy; 4554 4555 zpool_get_load_policy(nvpolicy ? nvpolicy : spa->spa_config, 4556 &policy); 4557 if (policy.zlp_rewind & ZPOOL_DO_REWIND) 4558 state = SPA_LOAD_RECOVER; 4559 4560 spa_activate(spa, spa_mode_global); 4561 4562 if (state != SPA_LOAD_RECOVER) 4563 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 4564 spa->spa_config_source = SPA_CONFIG_SRC_CACHEFILE; 4565 4566 zfs_dbgmsg("spa_open_common: opening %s", pool); 4567 error = spa_load_best(spa, state, policy.zlp_txg, 4568 policy.zlp_rewind); 4569 4570 if (error == EBADF) { 4571 /* 4572 * If vdev_validate() returns failure (indicated by 4573 * EBADF), it indicates that one of the vdevs indicates 4574 * that the pool has been exported or destroyed. If 4575 * this is the case, the config cache is out of sync and 4576 * we should remove the pool from the namespace. 4577 */ 4578 spa_unload(spa); 4579 spa_deactivate(spa); 4580 spa_write_cachefile(spa, B_TRUE, B_TRUE); 4581 spa_remove(spa); 4582 if (locked) 4583 mutex_exit(&spa_namespace_lock); 4584 return (SET_ERROR(ENOENT)); 4585 } 4586 4587 if (error) { 4588 /* 4589 * We can't open the pool, but we still have useful 4590 * information: the state of each vdev after the 4591 * attempted vdev_open(). Return this to the user. 4592 */ 4593 if (config != NULL && spa->spa_config) { 4594 VERIFY(nvlist_dup(spa->spa_config, config, 4595 KM_SLEEP) == 0); 4596 VERIFY(nvlist_add_nvlist(*config, 4597 ZPOOL_CONFIG_LOAD_INFO, 4598 spa->spa_load_info) == 0); 4599 } 4600 spa_unload(spa); 4601 spa_deactivate(spa); 4602 spa->spa_last_open_failed = error; 4603 if (locked) 4604 mutex_exit(&spa_namespace_lock); 4605 *spapp = NULL; 4606 return (error); 4607 } 4608 } 4609 4610 spa_open_ref(spa, tag); 4611 4612 if (config != NULL) 4613 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4614 4615 /* 4616 * If we've recovered the pool, pass back any information we 4617 * gathered while doing the load. 4618 */ 4619 if (state == SPA_LOAD_RECOVER) { 4620 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 4621 spa->spa_load_info) == 0); 4622 } 4623 4624 if (locked) { 4625 spa->spa_last_open_failed = 0; 4626 spa->spa_last_ubsync_txg = 0; 4627 spa->spa_load_txg = 0; 4628 mutex_exit(&spa_namespace_lock); 4629 } 4630 4631 *spapp = spa; 4632 4633 return (0); 4634 } 4635 4636 int 4637 spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 4638 nvlist_t **config) 4639 { 4640 return (spa_open_common(name, spapp, tag, policy, config)); 4641 } 4642 4643 int 4644 spa_open(const char *name, spa_t **spapp, void *tag) 4645 { 4646 return (spa_open_common(name, spapp, tag, NULL, NULL)); 4647 } 4648 4649 /* 4650 * Lookup the given spa_t, incrementing the inject count in the process, 4651 * preventing it from being exported or destroyed. 4652 */ 4653 spa_t * 4654 spa_inject_addref(char *name) 4655 { 4656 spa_t *spa; 4657 4658 mutex_enter(&spa_namespace_lock); 4659 if ((spa = spa_lookup(name)) == NULL) { 4660 mutex_exit(&spa_namespace_lock); 4661 return (NULL); 4662 } 4663 spa->spa_inject_ref++; 4664 mutex_exit(&spa_namespace_lock); 4665 4666 return (spa); 4667 } 4668 4669 void 4670 spa_inject_delref(spa_t *spa) 4671 { 4672 mutex_enter(&spa_namespace_lock); 4673 spa->spa_inject_ref--; 4674 mutex_exit(&spa_namespace_lock); 4675 } 4676 4677 /* 4678 * Add spares device information to the nvlist. 4679 */ 4680 static void 4681 spa_add_spares(spa_t *spa, nvlist_t *config) 4682 { 4683 nvlist_t **spares; 4684 uint_t i, nspares; 4685 nvlist_t *nvroot; 4686 uint64_t guid; 4687 vdev_stat_t *vs; 4688 uint_t vsc; 4689 uint64_t pool; 4690 4691 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 4692 4693 if (spa->spa_spares.sav_count == 0) 4694 return; 4695 4696 VERIFY(nvlist_lookup_nvlist(config, 4697 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 4698 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 4699 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 4700 if (nspares != 0) { 4701 VERIFY(nvlist_add_nvlist_array(nvroot, 4702 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 4703 VERIFY(nvlist_lookup_nvlist_array(nvroot, 4704 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 4705 4706 /* 4707 * Go through and find any spares which have since been 4708 * repurposed as an active spare. If this is the case, update 4709 * their status appropriately. 4710 */ 4711 for (i = 0; i < nspares; i++) { 4712 VERIFY(nvlist_lookup_uint64(spares[i], 4713 ZPOOL_CONFIG_GUID, &guid) == 0); 4714 if (spa_spare_exists(guid, &pool, NULL) && 4715 pool != 0ULL) { 4716 VERIFY(nvlist_lookup_uint64_array( 4717 spares[i], ZPOOL_CONFIG_VDEV_STATS, 4718 (uint64_t **)&vs, &vsc) == 0); 4719 vs->vs_state = VDEV_STATE_CANT_OPEN; 4720 vs->vs_aux = VDEV_AUX_SPARED; 4721 } 4722 } 4723 } 4724 } 4725 4726 /* 4727 * Add l2cache device information to the nvlist, including vdev stats. 4728 */ 4729 static void 4730 spa_add_l2cache(spa_t *spa, nvlist_t *config) 4731 { 4732 nvlist_t **l2cache; 4733 uint_t i, j, nl2cache; 4734 nvlist_t *nvroot; 4735 uint64_t guid; 4736 vdev_t *vd; 4737 vdev_stat_t *vs; 4738 uint_t vsc; 4739 4740 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 4741 4742 if (spa->spa_l2cache.sav_count == 0) 4743 return; 4744 4745 VERIFY(nvlist_lookup_nvlist(config, 4746 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 4747 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 4748 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 4749 if (nl2cache != 0) { 4750 VERIFY(nvlist_add_nvlist_array(nvroot, 4751 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 4752 VERIFY(nvlist_lookup_nvlist_array(nvroot, 4753 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 4754 4755 /* 4756 * Update level 2 cache device stats. 4757 */ 4758 4759 for (i = 0; i < nl2cache; i++) { 4760 VERIFY(nvlist_lookup_uint64(l2cache[i], 4761 ZPOOL_CONFIG_GUID, &guid) == 0); 4762 4763 vd = NULL; 4764 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 4765 if (guid == 4766 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 4767 vd = spa->spa_l2cache.sav_vdevs[j]; 4768 break; 4769 } 4770 } 4771 ASSERT(vd != NULL); 4772 4773 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 4774 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 4775 == 0); 4776 vdev_get_stats(vd, vs); 4777 vdev_config_generate_stats(vd, l2cache[i]); 4778 4779 } 4780 } 4781 } 4782 4783 static void 4784 spa_add_feature_stats(spa_t *spa, nvlist_t *config) 4785 { 4786 nvlist_t *features; 4787 zap_cursor_t zc; 4788 zap_attribute_t za; 4789 4790 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 4791 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4792 4793 if (spa->spa_feat_for_read_obj != 0) { 4794 for (zap_cursor_init(&zc, spa->spa_meta_objset, 4795 spa->spa_feat_for_read_obj); 4796 zap_cursor_retrieve(&zc, &za) == 0; 4797 zap_cursor_advance(&zc)) { 4798 ASSERT(za.za_integer_length == sizeof (uint64_t) && 4799 za.za_num_integers == 1); 4800 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 4801 za.za_first_integer)); 4802 } 4803 zap_cursor_fini(&zc); 4804 } 4805 4806 if (spa->spa_feat_for_write_obj != 0) { 4807 for (zap_cursor_init(&zc, spa->spa_meta_objset, 4808 spa->spa_feat_for_write_obj); 4809 zap_cursor_retrieve(&zc, &za) == 0; 4810 zap_cursor_advance(&zc)) { 4811 ASSERT(za.za_integer_length == sizeof (uint64_t) && 4812 za.za_num_integers == 1); 4813 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 4814 za.za_first_integer)); 4815 } 4816 zap_cursor_fini(&zc); 4817 } 4818 4819 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 4820 features) == 0); 4821 nvlist_free(features); 4822 } 4823 4824 int 4825 spa_get_stats(const char *name, nvlist_t **config, 4826 char *altroot, size_t buflen) 4827 { 4828 int error; 4829 spa_t *spa; 4830 4831 *config = NULL; 4832 error = spa_open_common(name, &spa, FTAG, NULL, config); 4833 4834 if (spa != NULL) { 4835 /* 4836 * This still leaves a window of inconsistency where the spares 4837 * or l2cache devices could change and the config would be 4838 * self-inconsistent. 4839 */ 4840 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4841 4842 if (*config != NULL) { 4843 uint64_t loadtimes[2]; 4844 4845 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 4846 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 4847 VERIFY(nvlist_add_uint64_array(*config, 4848 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 4849 4850 VERIFY(nvlist_add_uint64(*config, 4851 ZPOOL_CONFIG_ERRCOUNT, 4852 spa_get_errlog_size(spa)) == 0); 4853 4854 if (spa_suspended(spa)) { 4855 VERIFY(nvlist_add_uint64(*config, 4856 ZPOOL_CONFIG_SUSPENDED, 4857 spa->spa_failmode) == 0); 4858 VERIFY(nvlist_add_uint64(*config, 4859 ZPOOL_CONFIG_SUSPENDED_REASON, 4860 spa->spa_suspended) == 0); 4861 } 4862 4863 spa_add_spares(spa, *config); 4864 spa_add_l2cache(spa, *config); 4865 spa_add_feature_stats(spa, *config); 4866 } 4867 } 4868 4869 /* 4870 * We want to get the alternate root even for faulted pools, so we cheat 4871 * and call spa_lookup() directly. 4872 */ 4873 if (altroot) { 4874 if (spa == NULL) { 4875 mutex_enter(&spa_namespace_lock); 4876 spa = spa_lookup(name); 4877 if (spa) 4878 spa_altroot(spa, altroot, buflen); 4879 else 4880 altroot[0] = '\0'; 4881 spa = NULL; 4882 mutex_exit(&spa_namespace_lock); 4883 } else { 4884 spa_altroot(spa, altroot, buflen); 4885 } 4886 } 4887 4888 if (spa != NULL) { 4889 spa_config_exit(spa, SCL_CONFIG, FTAG); 4890 spa_close(spa, FTAG); 4891 } 4892 4893 return (error); 4894 } 4895 4896 /* 4897 * Validate that the auxiliary device array is well formed. We must have an 4898 * array of nvlists, each which describes a valid leaf vdev. If this is an 4899 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 4900 * specified, as long as they are well-formed. 4901 */ 4902 static int 4903 spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 4904 spa_aux_vdev_t *sav, const char *config, uint64_t version, 4905 vdev_labeltype_t label) 4906 { 4907 nvlist_t **dev; 4908 uint_t i, ndev; 4909 vdev_t *vd; 4910 int error; 4911 4912 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 4913 4914 /* 4915 * It's acceptable to have no devs specified. 4916 */ 4917 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 4918 return (0); 4919 4920 if (ndev == 0) 4921 return (SET_ERROR(EINVAL)); 4922 4923 /* 4924 * Make sure the pool is formatted with a version that supports this 4925 * device type. 4926 */ 4927 if (spa_version(spa) < version) 4928 return (SET_ERROR(ENOTSUP)); 4929 4930 /* 4931 * Set the pending device list so we correctly handle device in-use 4932 * checking. 4933 */ 4934 sav->sav_pending = dev; 4935 sav->sav_npending = ndev; 4936 4937 for (i = 0; i < ndev; i++) { 4938 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 4939 mode)) != 0) 4940 goto out; 4941 4942 if (!vd->vdev_ops->vdev_op_leaf) { 4943 vdev_free(vd); 4944 error = SET_ERROR(EINVAL); 4945 goto out; 4946 } 4947 4948 vd->vdev_top = vd; 4949 4950 if ((error = vdev_open(vd)) == 0 && 4951 (error = vdev_label_init(vd, crtxg, label)) == 0) { 4952 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 4953 vd->vdev_guid) == 0); 4954 } 4955 4956 vdev_free(vd); 4957 4958 if (error && 4959 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 4960 goto out; 4961 else 4962 error = 0; 4963 } 4964 4965 out: 4966 sav->sav_pending = NULL; 4967 sav->sav_npending = 0; 4968 return (error); 4969 } 4970 4971 static int 4972 spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 4973 { 4974 int error; 4975 4976 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 4977 4978 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 4979 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 4980 VDEV_LABEL_SPARE)) != 0) { 4981 return (error); 4982 } 4983 4984 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 4985 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 4986 VDEV_LABEL_L2CACHE)); 4987 } 4988 4989 static void 4990 spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 4991 const char *config) 4992 { 4993 int i; 4994 4995 if (sav->sav_config != NULL) { 4996 nvlist_t **olddevs; 4997 uint_t oldndevs; 4998 nvlist_t **newdevs; 4999 5000 /* 5001 * Generate new dev list by concatentating with the 5002 * current dev list. 5003 */ 5004 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 5005 &olddevs, &oldndevs) == 0); 5006 5007 newdevs = kmem_alloc(sizeof (void *) * 5008 (ndevs + oldndevs), KM_SLEEP); 5009 for (i = 0; i < oldndevs; i++) 5010 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 5011 KM_SLEEP) == 0); 5012 for (i = 0; i < ndevs; i++) 5013 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 5014 KM_SLEEP) == 0); 5015 5016 VERIFY(nvlist_remove(sav->sav_config, config, 5017 DATA_TYPE_NVLIST_ARRAY) == 0); 5018 5019 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 5020 config, newdevs, ndevs + oldndevs) == 0); 5021 for (i = 0; i < oldndevs + ndevs; i++) 5022 nvlist_free(newdevs[i]); 5023 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 5024 } else { 5025 /* 5026 * Generate a new dev list. 5027 */ 5028 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 5029 KM_SLEEP) == 0); 5030 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 5031 devs, ndevs) == 0); 5032 } 5033 } 5034 5035 /* 5036 * Stop and drop level 2 ARC devices 5037 */ 5038 void 5039 spa_l2cache_drop(spa_t *spa) 5040 { 5041 vdev_t *vd; 5042 int i; 5043 spa_aux_vdev_t *sav = &spa->spa_l2cache; 5044 5045 for (i = 0; i < sav->sav_count; i++) { 5046 uint64_t pool; 5047 5048 vd = sav->sav_vdevs[i]; 5049 ASSERT(vd != NULL); 5050 5051 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 5052 pool != 0ULL && l2arc_vdev_present(vd)) 5053 l2arc_remove_vdev(vd); 5054 } 5055 } 5056 5057 /* 5058 * Verify encryption parameters for spa creation. If we are encrypting, we must 5059 * have the encryption feature flag enabled. 5060 */ 5061 static int 5062 spa_create_check_encryption_params(dsl_crypto_params_t *dcp, 5063 boolean_t has_encryption) 5064 { 5065 if (dcp->cp_crypt != ZIO_CRYPT_OFF && 5066 dcp->cp_crypt != ZIO_CRYPT_INHERIT && 5067 !has_encryption) 5068 return (SET_ERROR(ENOTSUP)); 5069 5070 return (dmu_objset_create_crypt_check(NULL, dcp, NULL)); 5071 } 5072 5073 /* 5074 * Pool Creation 5075 */ 5076 int 5077 spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 5078 nvlist_t *zplprops, dsl_crypto_params_t *dcp) 5079 { 5080 spa_t *spa; 5081 char *altroot = NULL; 5082 vdev_t *rvd; 5083 dsl_pool_t *dp; 5084 dmu_tx_t *tx; 5085 int error = 0; 5086 uint64_t txg = TXG_INITIAL; 5087 nvlist_t **spares, **l2cache; 5088 uint_t nspares, nl2cache; 5089 uint64_t version, obj; 5090 boolean_t has_features; 5091 char *poolname; 5092 nvlist_t *nvl; 5093 boolean_t has_encryption; 5094 spa_feature_t feat; 5095 char *feat_name; 5096 5097 if (props == NULL || 5098 nvlist_lookup_string(props, 5099 zpool_prop_to_name(ZPOOL_PROP_TNAME), &poolname) != 0) 5100 poolname = (char *)pool; 5101 5102 /* 5103 * If this pool already exists, return failure. 5104 */ 5105 mutex_enter(&spa_namespace_lock); 5106 if (spa_lookup(poolname) != NULL) { 5107 mutex_exit(&spa_namespace_lock); 5108 return (SET_ERROR(EEXIST)); 5109 } 5110 5111 /* 5112 * Allocate a new spa_t structure. 5113 */ 5114 nvl = fnvlist_alloc(); 5115 fnvlist_add_string(nvl, ZPOOL_CONFIG_POOL_NAME, pool); 5116 (void) nvlist_lookup_string(props, 5117 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 5118 spa = spa_add(poolname, nvl, altroot); 5119 fnvlist_free(nvl); 5120 spa_activate(spa, spa_mode_global); 5121 5122 if (props && (error = spa_prop_validate(spa, props))) { 5123 spa_deactivate(spa); 5124 spa_remove(spa); 5125 mutex_exit(&spa_namespace_lock); 5126 return (error); 5127 } 5128 5129 /* 5130 * Temporary pool names should never be written to disk. 5131 */ 5132 if (poolname != pool) 5133 spa->spa_import_flags |= ZFS_IMPORT_TEMP_NAME; 5134 5135 has_features = B_FALSE; 5136 has_encryption = B_FALSE; 5137 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 5138 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 5139 if (zpool_prop_feature(nvpair_name(elem))) { 5140 has_features = B_TRUE; 5141 feat_name = strchr(nvpair_name(elem), '@') + 1; 5142 VERIFY0(zfeature_lookup_name(feat_name, &feat)); 5143 if (feat == SPA_FEATURE_ENCRYPTION) 5144 has_encryption = B_TRUE; 5145 } 5146 } 5147 5148 /* verify encryption params, if they were provided */ 5149 if (dcp != NULL) { 5150 error = spa_create_check_encryption_params(dcp, has_encryption); 5151 if (error != 0) { 5152 spa_deactivate(spa); 5153 spa_remove(spa); 5154 mutex_exit(&spa_namespace_lock); 5155 return (error); 5156 } 5157 } 5158 5159 if (has_features || nvlist_lookup_uint64(props, 5160 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 5161 version = SPA_VERSION; 5162 } 5163 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 5164 5165 spa->spa_first_txg = txg; 5166 spa->spa_uberblock.ub_txg = txg - 1; 5167 spa->spa_uberblock.ub_version = version; 5168 spa->spa_ubsync = spa->spa_uberblock; 5169 spa->spa_load_state = SPA_LOAD_CREATE; 5170 spa->spa_removing_phys.sr_state = DSS_NONE; 5171 spa->spa_removing_phys.sr_removing_vdev = -1; 5172 spa->spa_removing_phys.sr_prev_indirect_vdev = -1; 5173 spa->spa_indirect_vdevs_loaded = B_TRUE; 5174 5175 /* 5176 * Create "The Godfather" zio to hold all async IOs 5177 */ 5178 spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *), 5179 KM_SLEEP); 5180 for (int i = 0; i < max_ncpus; i++) { 5181 spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL, 5182 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | 5183 ZIO_FLAG_GODFATHER); 5184 } 5185 5186 /* 5187 * Create the root vdev. 5188 */ 5189 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5190 5191 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 5192 5193 ASSERT(error != 0 || rvd != NULL); 5194 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 5195 5196 if (error == 0 && !zfs_allocatable_devs(nvroot)) 5197 error = SET_ERROR(EINVAL); 5198 5199 if (error == 0 && 5200 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 5201 (error = spa_validate_aux(spa, nvroot, txg, 5202 VDEV_ALLOC_ADD)) == 0) { 5203 /* 5204 * instantiate the metaslab groups (this will dirty the vdevs) 5205 * we can no longer error exit past this point 5206 */ 5207 for (int c = 0; error == 0 && c < rvd->vdev_children; c++) { 5208 vdev_t *vd = rvd->vdev_child[c]; 5209 5210 vdev_metaslab_set_size(vd); 5211 vdev_expand(vd, txg); 5212 } 5213 } 5214 5215 spa_config_exit(spa, SCL_ALL, FTAG); 5216 5217 if (error != 0) { 5218 spa_unload(spa); 5219 spa_deactivate(spa); 5220 spa_remove(spa); 5221 mutex_exit(&spa_namespace_lock); 5222 return (error); 5223 } 5224 5225 /* 5226 * Get the list of spares, if specified. 5227 */ 5228 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 5229 &spares, &nspares) == 0) { 5230 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 5231 KM_SLEEP) == 0); 5232 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 5233 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 5234 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5235 spa_load_spares(spa); 5236 spa_config_exit(spa, SCL_ALL, FTAG); 5237 spa->spa_spares.sav_sync = B_TRUE; 5238 } 5239 5240 /* 5241 * Get the list of level 2 cache devices, if specified. 5242 */ 5243 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 5244 &l2cache, &nl2cache) == 0) { 5245 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 5246 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5247 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 5248 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 5249 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5250 spa_load_l2cache(spa); 5251 spa_config_exit(spa, SCL_ALL, FTAG); 5252 spa->spa_l2cache.sav_sync = B_TRUE; 5253 } 5254 5255 spa->spa_is_initializing = B_TRUE; 5256 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, dcp, txg); 5257 spa->spa_is_initializing = B_FALSE; 5258 5259 /* 5260 * Create DDTs (dedup tables). 5261 */ 5262 ddt_create(spa); 5263 5264 spa_update_dspace(spa); 5265 5266 tx = dmu_tx_create_assigned(dp, txg); 5267 5268 /* 5269 * Create the pool config object. 5270 */ 5271 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 5272 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 5273 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 5274 5275 if (zap_add(spa->spa_meta_objset, 5276 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 5277 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 5278 cmn_err(CE_PANIC, "failed to add pool config"); 5279 } 5280 5281 if (zap_add(spa->spa_meta_objset, 5282 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 5283 sizeof (uint64_t), 1, &version, tx) != 0) { 5284 cmn_err(CE_PANIC, "failed to add pool version"); 5285 } 5286 5287 /* Newly created pools with the right version are always deflated. */ 5288 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 5289 spa->spa_deflate = TRUE; 5290 if (zap_add(spa->spa_meta_objset, 5291 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 5292 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 5293 cmn_err(CE_PANIC, "failed to add deflate"); 5294 } 5295 } 5296 5297 /* 5298 * Create the deferred-free bpobj. Turn off compression 5299 * because sync-to-convergence takes longer if the blocksize 5300 * keeps changing. 5301 */ 5302 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 5303 dmu_object_set_compress(spa->spa_meta_objset, obj, 5304 ZIO_COMPRESS_OFF, tx); 5305 if (zap_add(spa->spa_meta_objset, 5306 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 5307 sizeof (uint64_t), 1, &obj, tx) != 0) { 5308 cmn_err(CE_PANIC, "failed to add bpobj"); 5309 } 5310 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 5311 spa->spa_meta_objset, obj)); 5312 5313 /* 5314 * Create the pool's history object. 5315 */ 5316 if (version >= SPA_VERSION_ZPOOL_HISTORY) 5317 spa_history_create_obj(spa, tx); 5318 5319 /* 5320 * Generate some random noise for salted checksums to operate on. 5321 */ 5322 (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes, 5323 sizeof (spa->spa_cksum_salt.zcs_bytes)); 5324 5325 /* 5326 * Set pool properties. 5327 */ 5328 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 5329 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 5330 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 5331 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 5332 spa->spa_multihost = zpool_prop_default_numeric(ZPOOL_PROP_MULTIHOST); 5333 spa->spa_autotrim = zpool_prop_default_numeric(ZPOOL_PROP_AUTOTRIM); 5334 5335 if (props != NULL) { 5336 spa_configfile_set(spa, props, B_FALSE); 5337 spa_sync_props(props, tx); 5338 } 5339 5340 dmu_tx_commit(tx); 5341 5342 spa->spa_sync_on = B_TRUE; 5343 txg_sync_start(spa->spa_dsl_pool); 5344 mmp_thread_start(spa); 5345 5346 /* 5347 * We explicitly wait for the first transaction to complete so that our 5348 * bean counters are appropriately updated. 5349 */ 5350 txg_wait_synced(spa->spa_dsl_pool, txg); 5351 5352 spa_spawn_aux_threads(spa); 5353 5354 spa_write_cachefile(spa, B_FALSE, B_TRUE); 5355 spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_CREATE); 5356 5357 spa_history_log_version(spa, "create"); 5358 5359 /* 5360 * Don't count references from objsets that are already closed 5361 * and are making their way through the eviction process. 5362 */ 5363 spa_evicting_os_wait(spa); 5364 spa->spa_minref = zfs_refcount_count(&spa->spa_refcount); 5365 spa->spa_load_state = SPA_LOAD_NONE; 5366 5367 mutex_exit(&spa_namespace_lock); 5368 5369 return (0); 5370 } 5371 5372 #ifdef _KERNEL 5373 /* 5374 * Get the root pool information from the root disk, then import the root pool 5375 * during the system boot up time. 5376 */ 5377 static nvlist_t * 5378 spa_generate_rootconf(const char *devpath, const char *devid, uint64_t *guid, 5379 uint64_t pool_guid) 5380 { 5381 nvlist_t *config; 5382 nvlist_t *nvtop, *nvroot; 5383 uint64_t pgid; 5384 5385 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 5386 return (NULL); 5387 5388 /* 5389 * Add this top-level vdev to the child array. 5390 */ 5391 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 5392 &nvtop) == 0); 5393 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 5394 &pgid) == 0); 5395 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 5396 5397 if (pool_guid != 0 && pool_guid != pgid) { 5398 /* 5399 * The boot loader provided a pool GUID, but it does not match 5400 * the one we found in the label. Return failure so that we 5401 * can fall back to the full device scan. 5402 */ 5403 zfs_dbgmsg("spa_generate_rootconf: loader pool guid %llu != " 5404 "label pool guid %llu", (u_longlong_t)pool_guid, 5405 (u_longlong_t)pgid); 5406 nvlist_free(config); 5407 return (NULL); 5408 } 5409 5410 /* 5411 * Put this pool's top-level vdevs into a root vdev. 5412 */ 5413 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5414 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 5415 VDEV_TYPE_ROOT) == 0); 5416 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 5417 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 5418 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 5419 &nvtop, 1) == 0); 5420 5421 /* 5422 * Replace the existing vdev_tree with the new root vdev in 5423 * this pool's configuration (remove the old, add the new). 5424 */ 5425 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 5426 nvlist_free(nvroot); 5427 return (config); 5428 } 5429 5430 /* 5431 * Walk the vdev tree and see if we can find a device with "better" 5432 * configuration. A configuration is "better" if the label on that 5433 * device has a more recent txg. 5434 */ 5435 static void 5436 spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 5437 { 5438 for (int c = 0; c < vd->vdev_children; c++) 5439 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 5440 5441 if (vd->vdev_ops->vdev_op_leaf) { 5442 nvlist_t *label; 5443 uint64_t label_txg; 5444 5445 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 5446 &label) != 0) 5447 return; 5448 5449 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 5450 &label_txg) == 0); 5451 5452 /* 5453 * Do we have a better boot device? 5454 */ 5455 if (label_txg > *txg) { 5456 *txg = label_txg; 5457 *avd = vd; 5458 } 5459 nvlist_free(label); 5460 } 5461 } 5462 5463 /* 5464 * Import a root pool. 5465 * 5466 * For x86. devpath_list will consist of devid and/or physpath name of 5467 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 5468 * The GRUB "findroot" command will return the vdev we should boot. 5469 * 5470 * For Sparc, devpath_list consists the physpath name of the booting device 5471 * no matter the rootpool is a single device pool or a mirrored pool. 5472 * e.g. 5473 * "/pci@1f,0/ide@d/disk@0,0:a" 5474 */ 5475 int 5476 spa_import_rootpool(char *devpath, char *devid, uint64_t pool_guid, 5477 uint64_t vdev_guid) 5478 { 5479 spa_t *spa; 5480 vdev_t *rvd, *bvd, *avd = NULL; 5481 nvlist_t *config, *nvtop; 5482 uint64_t guid, txg; 5483 char *pname; 5484 int error; 5485 const char *altdevpath = NULL; 5486 const char *rdpath = NULL; 5487 5488 if ((rdpath = vdev_disk_preroot_force_path()) != NULL) { 5489 /* 5490 * We expect to import a single-vdev pool from a specific 5491 * device such as a ramdisk device. We don't care what the 5492 * pool label says. 5493 */ 5494 config = spa_generate_rootconf(rdpath, NULL, &guid, 0); 5495 if (config != NULL) { 5496 goto configok; 5497 } 5498 cmn_err(CE_NOTE, "Cannot use root disk device '%s'", rdpath); 5499 return (SET_ERROR(EIO)); 5500 } 5501 5502 /* 5503 * Read the label from the boot device and generate a configuration. 5504 */ 5505 config = spa_generate_rootconf(devpath, devid, &guid, pool_guid); 5506 #if defined(_OBP) && defined(_KERNEL) 5507 if (config == NULL) { 5508 if (strstr(devpath, "/iscsi/ssd") != NULL) { 5509 /* iscsi boot */ 5510 get_iscsi_bootpath_phy(devpath); 5511 config = spa_generate_rootconf(devpath, devid, &guid, 5512 pool_guid); 5513 } 5514 } 5515 #endif 5516 5517 /* 5518 * We were unable to import the pool using the /devices path or devid 5519 * provided by the boot loader. This may be the case if the boot 5520 * device has been connected to a different location in the system, or 5521 * if a new boot environment has changed the driver used to access the 5522 * boot device. 5523 * 5524 * Attempt an exhaustive scan of all visible block devices to see if we 5525 * can locate an alternative /devices path with a label that matches 5526 * the expected pool and vdev GUID. 5527 */ 5528 if (config == NULL && (altdevpath = 5529 vdev_disk_preroot_lookup(pool_guid, vdev_guid)) != NULL) { 5530 cmn_err(CE_NOTE, "Original /devices path (%s) not available; " 5531 "ZFS is trying an alternate path (%s)", devpath, 5532 altdevpath); 5533 config = spa_generate_rootconf(altdevpath, NULL, &guid, 5534 pool_guid); 5535 } 5536 5537 if (config == NULL) { 5538 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 5539 devpath); 5540 return (SET_ERROR(EIO)); 5541 } 5542 5543 configok: 5544 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 5545 &pname) == 0); 5546 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 5547 5548 mutex_enter(&spa_namespace_lock); 5549 if ((spa = spa_lookup(pname)) != NULL) { 5550 /* 5551 * Remove the existing root pool from the namespace so that we 5552 * can replace it with the correct config we just read in. 5553 */ 5554 spa_remove(spa); 5555 } 5556 5557 spa = spa_add(pname, config, NULL); 5558 spa->spa_is_root = B_TRUE; 5559 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 5560 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 5561 &spa->spa_ubsync.ub_version) != 0) 5562 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 5563 5564 /* 5565 * Build up a vdev tree based on the boot device's label config. 5566 */ 5567 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 5568 &nvtop) == 0); 5569 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5570 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 5571 VDEV_ALLOC_ROOTPOOL); 5572 spa_config_exit(spa, SCL_ALL, FTAG); 5573 if (error) { 5574 mutex_exit(&spa_namespace_lock); 5575 nvlist_free(config); 5576 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 5577 pname); 5578 return (error); 5579 } 5580 5581 /* 5582 * Get the boot vdev. 5583 */ 5584 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 5585 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 5586 (u_longlong_t)guid); 5587 error = SET_ERROR(ENOENT); 5588 goto out; 5589 } 5590 5591 /* 5592 * Determine if there is a better boot device. 5593 */ 5594 avd = bvd; 5595 spa_alt_rootvdev(rvd, &avd, &txg); 5596 if (avd != bvd) { 5597 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 5598 "try booting from '%s'", avd->vdev_path); 5599 error = SET_ERROR(EINVAL); 5600 goto out; 5601 } 5602 5603 /* 5604 * If the boot device is part of a spare vdev then ensure that 5605 * we're booting off the active spare. 5606 */ 5607 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 5608 !bvd->vdev_isspare) { 5609 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 5610 "try booting from '%s'", 5611 bvd->vdev_parent-> 5612 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 5613 error = SET_ERROR(EINVAL); 5614 goto out; 5615 } 5616 5617 /* 5618 * The root disk may have been expanded while the system was offline. 5619 * Kick off an async task to check for and handle expansion. 5620 */ 5621 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 5622 5623 error = 0; 5624 out: 5625 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5626 vdev_free(rvd); 5627 spa_config_exit(spa, SCL_ALL, FTAG); 5628 mutex_exit(&spa_namespace_lock); 5629 5630 nvlist_free(config); 5631 return (error); 5632 } 5633 5634 #endif 5635 5636 /* 5637 * Import a non-root pool into the system. 5638 */ 5639 int 5640 spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) 5641 { 5642 spa_t *spa; 5643 char *altroot = NULL; 5644 spa_load_state_t state = SPA_LOAD_IMPORT; 5645 zpool_load_policy_t policy; 5646 uint64_t mode = spa_mode_global; 5647 uint64_t readonly = B_FALSE; 5648 int error; 5649 nvlist_t *nvroot; 5650 nvlist_t **spares, **l2cache; 5651 uint_t nspares, nl2cache; 5652 5653 /* 5654 * If a pool with this name exists, return failure. 5655 */ 5656 mutex_enter(&spa_namespace_lock); 5657 if (spa_lookup(pool) != NULL) { 5658 mutex_exit(&spa_namespace_lock); 5659 return (SET_ERROR(EEXIST)); 5660 } 5661 5662 /* 5663 * Create and initialize the spa structure. 5664 */ 5665 (void) nvlist_lookup_string(props, 5666 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 5667 (void) nvlist_lookup_uint64(props, 5668 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); 5669 if (readonly) 5670 mode = FREAD; 5671 spa = spa_add(pool, config, altroot); 5672 spa->spa_import_flags = flags; 5673 5674 /* 5675 * Verbatim import - Take a pool and insert it into the namespace 5676 * as if it had been loaded at boot. 5677 */ 5678 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { 5679 if (props != NULL) 5680 spa_configfile_set(spa, props, B_FALSE); 5681 5682 spa_write_cachefile(spa, B_FALSE, B_TRUE); 5683 spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_IMPORT); 5684 zfs_dbgmsg("spa_import: verbatim import of %s", pool); 5685 mutex_exit(&spa_namespace_lock); 5686 return (0); 5687 } 5688 5689 spa_activate(spa, mode); 5690 5691 /* 5692 * Don't start async tasks until we know everything is healthy. 5693 */ 5694 spa_async_suspend(spa); 5695 5696 zpool_get_load_policy(config, &policy); 5697 if (policy.zlp_rewind & ZPOOL_DO_REWIND) 5698 state = SPA_LOAD_RECOVER; 5699 5700 spa->spa_config_source = SPA_CONFIG_SRC_TRYIMPORT; 5701 5702 if (state != SPA_LOAD_RECOVER) { 5703 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 5704 zfs_dbgmsg("spa_import: importing %s", pool); 5705 } else { 5706 zfs_dbgmsg("spa_import: importing %s, max_txg=%lld " 5707 "(RECOVERY MODE)", pool, (longlong_t)policy.zlp_txg); 5708 } 5709 error = spa_load_best(spa, state, policy.zlp_txg, policy.zlp_rewind); 5710 5711 /* 5712 * Propagate anything learned while loading the pool and pass it 5713 * back to caller (i.e. rewind info, missing devices, etc). 5714 */ 5715 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 5716 spa->spa_load_info) == 0); 5717 5718 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5719 /* 5720 * Toss any existing sparelist, as it doesn't have any validity 5721 * anymore, and conflicts with spa_has_spare(). 5722 */ 5723 if (spa->spa_spares.sav_config) { 5724 nvlist_free(spa->spa_spares.sav_config); 5725 spa->spa_spares.sav_config = NULL; 5726 spa_load_spares(spa); 5727 } 5728 if (spa->spa_l2cache.sav_config) { 5729 nvlist_free(spa->spa_l2cache.sav_config); 5730 spa->spa_l2cache.sav_config = NULL; 5731 spa_load_l2cache(spa); 5732 } 5733 5734 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 5735 &nvroot) == 0); 5736 if (error == 0) 5737 error = spa_validate_aux(spa, nvroot, -1ULL, 5738 VDEV_ALLOC_SPARE); 5739 if (error == 0) 5740 error = spa_validate_aux(spa, nvroot, -1ULL, 5741 VDEV_ALLOC_L2CACHE); 5742 spa_config_exit(spa, SCL_ALL, FTAG); 5743 5744 if (props != NULL) 5745 spa_configfile_set(spa, props, B_FALSE); 5746 5747 if (error != 0 || (props && spa_writeable(spa) && 5748 (error = spa_prop_set(spa, props)))) { 5749 spa_unload(spa); 5750 spa_deactivate(spa); 5751 spa_remove(spa); 5752 mutex_exit(&spa_namespace_lock); 5753 return (error); 5754 } 5755 5756 spa_async_resume(spa); 5757 5758 /* 5759 * Override any spares and level 2 cache devices as specified by 5760 * the user, as these may have correct device names/devids, etc. 5761 */ 5762 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 5763 &spares, &nspares) == 0) { 5764 if (spa->spa_spares.sav_config) 5765 VERIFY(nvlist_remove(spa->spa_spares.sav_config, 5766 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); 5767 else 5768 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, 5769 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5770 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 5771 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 5772 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5773 spa_load_spares(spa); 5774 spa_config_exit(spa, SCL_ALL, FTAG); 5775 spa->spa_spares.sav_sync = B_TRUE; 5776 } 5777 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 5778 &l2cache, &nl2cache) == 0) { 5779 if (spa->spa_l2cache.sav_config) 5780 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, 5781 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); 5782 else 5783 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 5784 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5785 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 5786 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 5787 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5788 spa_load_l2cache(spa); 5789 spa_config_exit(spa, SCL_ALL, FTAG); 5790 spa->spa_l2cache.sav_sync = B_TRUE; 5791 } 5792 5793 /* 5794 * Check for any removed devices. 5795 */ 5796 if (spa->spa_autoreplace) { 5797 spa_aux_check_removed(&spa->spa_spares); 5798 spa_aux_check_removed(&spa->spa_l2cache); 5799 } 5800 5801 if (spa_writeable(spa)) { 5802 /* 5803 * Update the config cache to include the newly-imported pool. 5804 */ 5805 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 5806 } 5807 5808 /* 5809 * It's possible that the pool was expanded while it was exported. 5810 * We kick off an async task to handle this for us. 5811 */ 5812 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 5813 5814 spa_history_log_version(spa, "import"); 5815 5816 spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_IMPORT); 5817 5818 mutex_exit(&spa_namespace_lock); 5819 5820 return (0); 5821 } 5822 5823 nvlist_t * 5824 spa_tryimport(nvlist_t *tryconfig) 5825 { 5826 nvlist_t *config = NULL; 5827 char *poolname, *cachefile; 5828 spa_t *spa; 5829 uint64_t state; 5830 int error; 5831 zpool_load_policy_t policy; 5832 5833 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) 5834 return (NULL); 5835 5836 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) 5837 return (NULL); 5838 5839 /* 5840 * Create and initialize the spa structure. 5841 */ 5842 mutex_enter(&spa_namespace_lock); 5843 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); 5844 spa_activate(spa, FREAD); 5845 5846 /* 5847 * Rewind pool if a max txg was provided. 5848 */ 5849 zpool_get_load_policy(spa->spa_config, &policy); 5850 if (policy.zlp_txg != UINT64_MAX) { 5851 spa->spa_load_max_txg = policy.zlp_txg; 5852 spa->spa_extreme_rewind = B_TRUE; 5853 zfs_dbgmsg("spa_tryimport: importing %s, max_txg=%lld", 5854 poolname, (longlong_t)policy.zlp_txg); 5855 } else { 5856 zfs_dbgmsg("spa_tryimport: importing %s", poolname); 5857 } 5858 5859 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_CACHEFILE, &cachefile) 5860 == 0) { 5861 zfs_dbgmsg("spa_tryimport: using cachefile '%s'", cachefile); 5862 spa->spa_config_source = SPA_CONFIG_SRC_CACHEFILE; 5863 } else { 5864 spa->spa_config_source = SPA_CONFIG_SRC_SCAN; 5865 } 5866 5867 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING); 5868 5869 /* 5870 * If 'tryconfig' was at least parsable, return the current config. 5871 */ 5872 if (spa->spa_root_vdev != NULL) { 5873 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 5874 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 5875 poolname) == 0); 5876 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 5877 state) == 0); 5878 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 5879 spa->spa_uberblock.ub_timestamp) == 0); 5880 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 5881 spa->spa_load_info) == 0); 5882 5883 /* 5884 * If the bootfs property exists on this pool then we 5885 * copy it out so that external consumers can tell which 5886 * pools are bootable. 5887 */ 5888 if ((!error || error == EEXIST) && spa->spa_bootfs) { 5889 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 5890 5891 /* 5892 * We have to play games with the name since the 5893 * pool was opened as TRYIMPORT_NAME. 5894 */ 5895 if (dsl_dsobj_to_dsname(spa_name(spa), 5896 spa->spa_bootfs, tmpname) == 0) { 5897 char *cp; 5898 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 5899 5900 cp = strchr(tmpname, '/'); 5901 if (cp == NULL) { 5902 (void) strlcpy(dsname, tmpname, 5903 MAXPATHLEN); 5904 } else { 5905 (void) snprintf(dsname, MAXPATHLEN, 5906 "%s/%s", poolname, ++cp); 5907 } 5908 VERIFY(nvlist_add_string(config, 5909 ZPOOL_CONFIG_BOOTFS, dsname) == 0); 5910 kmem_free(dsname, MAXPATHLEN); 5911 } 5912 kmem_free(tmpname, MAXPATHLEN); 5913 } 5914 5915 /* 5916 * Add the list of hot spares and level 2 cache devices. 5917 */ 5918 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 5919 spa_add_spares(spa, config); 5920 spa_add_l2cache(spa, config); 5921 spa_config_exit(spa, SCL_CONFIG, FTAG); 5922 } 5923 5924 spa_unload(spa); 5925 spa_deactivate(spa); 5926 spa_remove(spa); 5927 mutex_exit(&spa_namespace_lock); 5928 5929 return (config); 5930 } 5931 5932 /* 5933 * Pool export/destroy 5934 * 5935 * The act of destroying or exporting a pool is very simple. We make sure there 5936 * is no more pending I/O and any references to the pool are gone. Then, we 5937 * update the pool state and sync all the labels to disk, removing the 5938 * configuration from the cache afterwards. If the 'hardforce' flag is set, then 5939 * we don't sync the labels or remove the configuration cache. 5940 */ 5941 static int 5942 spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, 5943 boolean_t force, boolean_t hardforce) 5944 { 5945 spa_t *spa; 5946 5947 if (oldconfig) 5948 *oldconfig = NULL; 5949 5950 if (!(spa_mode_global & FWRITE)) 5951 return (SET_ERROR(EROFS)); 5952 5953 mutex_enter(&spa_namespace_lock); 5954 if ((spa = spa_lookup(pool)) == NULL) { 5955 mutex_exit(&spa_namespace_lock); 5956 return (SET_ERROR(ENOENT)); 5957 } 5958 5959 /* 5960 * Put a hold on the pool, drop the namespace lock, stop async tasks, 5961 * reacquire the namespace lock, and see if we can export. 5962 */ 5963 spa_open_ref(spa, FTAG); 5964 mutex_exit(&spa_namespace_lock); 5965 spa_async_suspend(spa); 5966 mutex_enter(&spa_namespace_lock); 5967 spa_close(spa, FTAG); 5968 5969 /* 5970 * The pool will be in core if it's openable, 5971 * in which case we can modify its state. 5972 */ 5973 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { 5974 5975 /* 5976 * Objsets may be open only because they're dirty, so we 5977 * have to force it to sync before checking spa_refcnt. 5978 */ 5979 txg_wait_synced(spa->spa_dsl_pool, 0); 5980 spa_evicting_os_wait(spa); 5981 5982 /* 5983 * A pool cannot be exported or destroyed if there are active 5984 * references. If we are resetting a pool, allow references by 5985 * fault injection handlers. 5986 */ 5987 if (!spa_refcount_zero(spa) || 5988 (spa->spa_inject_ref != 0 && 5989 new_state != POOL_STATE_UNINITIALIZED)) { 5990 spa_async_resume(spa); 5991 mutex_exit(&spa_namespace_lock); 5992 return (SET_ERROR(EBUSY)); 5993 } 5994 5995 /* 5996 * A pool cannot be exported if it has an active shared spare. 5997 * This is to prevent other pools stealing the active spare 5998 * from an exported pool. At user's own will, such pool can 5999 * be forcedly exported. 6000 */ 6001 if (!force && new_state == POOL_STATE_EXPORTED && 6002 spa_has_active_shared_spare(spa)) { 6003 spa_async_resume(spa); 6004 mutex_exit(&spa_namespace_lock); 6005 return (SET_ERROR(EXDEV)); 6006 } 6007 6008 /* 6009 * We're about to export or destroy this pool. Make sure 6010 * we stop all initialization and trim activity here before 6011 * we set the spa_final_txg. This will ensure that all 6012 * dirty data resulting from the initialization is 6013 * committed to disk before we unload the pool. 6014 */ 6015 if (spa->spa_root_vdev != NULL) { 6016 vdev_t *rvd = spa->spa_root_vdev; 6017 vdev_initialize_stop_all(rvd, VDEV_INITIALIZE_ACTIVE); 6018 vdev_trim_stop_all(rvd, VDEV_TRIM_ACTIVE); 6019 vdev_autotrim_stop_all(spa); 6020 } 6021 6022 /* 6023 * We want this to be reflected on every label, 6024 * so mark them all dirty. spa_unload() will do the 6025 * final sync that pushes these changes out. 6026 */ 6027 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { 6028 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 6029 spa->spa_state = new_state; 6030 spa->spa_final_txg = spa_last_synced_txg(spa) + 6031 TXG_DEFER_SIZE + 1; 6032 vdev_config_dirty(spa->spa_root_vdev); 6033 spa_config_exit(spa, SCL_ALL, FTAG); 6034 } 6035 } 6036 6037 spa_event_notify(spa, NULL, NULL, ESC_ZFS_POOL_DESTROY); 6038 6039 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 6040 spa_unload(spa); 6041 spa_deactivate(spa); 6042 } 6043 6044 if (oldconfig && spa->spa_config) 6045 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); 6046 6047 if (new_state != POOL_STATE_UNINITIALIZED) { 6048 if (!hardforce) 6049 spa_write_cachefile(spa, B_TRUE, B_TRUE); 6050 spa_remove(spa); 6051 } 6052 mutex_exit(&spa_namespace_lock); 6053 6054 return (0); 6055 } 6056 6057 /* 6058 * Destroy a storage pool. 6059 */ 6060 int 6061 spa_destroy(char *pool) 6062 { 6063 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, 6064 B_FALSE, B_FALSE)); 6065 } 6066 6067 /* 6068 * Export a storage pool. 6069 */ 6070 int 6071 spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 6072 boolean_t hardforce) 6073 { 6074 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, 6075 force, hardforce)); 6076 } 6077 6078 /* 6079 * Similar to spa_export(), this unloads the spa_t without actually removing it 6080 * from the namespace in any way. 6081 */ 6082 int 6083 spa_reset(char *pool) 6084 { 6085 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, 6086 B_FALSE, B_FALSE)); 6087 } 6088 6089 /* 6090 * ========================================================================== 6091 * Device manipulation 6092 * ========================================================================== 6093 */ 6094 6095 /* 6096 * Add a device to a storage pool. 6097 */ 6098 int 6099 spa_vdev_add(spa_t *spa, nvlist_t *nvroot) 6100 { 6101 uint64_t txg; 6102 int error; 6103 vdev_t *rvd = spa->spa_root_vdev; 6104 vdev_t *vd, *tvd; 6105 nvlist_t **spares, **l2cache; 6106 uint_t nspares, nl2cache; 6107 6108 ASSERT(spa_writeable(spa)); 6109 6110 txg = spa_vdev_enter(spa); 6111 6112 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, 6113 VDEV_ALLOC_ADD)) != 0) 6114 return (spa_vdev_exit(spa, NULL, txg, error)); 6115 6116 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ 6117 6118 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, 6119 &nspares) != 0) 6120 nspares = 0; 6121 6122 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, 6123 &nl2cache) != 0) 6124 nl2cache = 0; 6125 6126 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) 6127 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 6128 6129 if (vd->vdev_children != 0 && 6130 (error = vdev_create(vd, txg, B_FALSE)) != 0) 6131 return (spa_vdev_exit(spa, vd, txg, error)); 6132 6133 /* 6134 * We must validate the spares and l2cache devices after checking the 6135 * children. Otherwise, vdev_inuse() will blindly overwrite the spare. 6136 */ 6137 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) 6138 return (spa_vdev_exit(spa, vd, txg, error)); 6139 6140 /* 6141 * If we are in the middle of a device removal, we can only add 6142 * devices which match the existing devices in the pool. 6143 * If we are in the middle of a removal, or have some indirect 6144 * vdevs, we can not add raidz toplevels. 6145 */ 6146 if (spa->spa_vdev_removal != NULL || 6147 spa->spa_removing_phys.sr_prev_indirect_vdev != -1) { 6148 for (int c = 0; c < vd->vdev_children; c++) { 6149 tvd = vd->vdev_child[c]; 6150 if (spa->spa_vdev_removal != NULL && 6151 tvd->vdev_ashift != spa->spa_max_ashift) { 6152 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 6153 } 6154 /* Fail if top level vdev is raidz */ 6155 if (tvd->vdev_ops == &vdev_raidz_ops) { 6156 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 6157 } 6158 /* 6159 * Need the top level mirror to be 6160 * a mirror of leaf vdevs only 6161 */ 6162 if (tvd->vdev_ops == &vdev_mirror_ops) { 6163 for (uint64_t cid = 0; 6164 cid < tvd->vdev_children; cid++) { 6165 vdev_t *cvd = tvd->vdev_child[cid]; 6166 if (!cvd->vdev_ops->vdev_op_leaf) { 6167 return (spa_vdev_exit(spa, vd, 6168 txg, EINVAL)); 6169 } 6170 } 6171 } 6172 } 6173 } 6174 6175 for (int c = 0; c < vd->vdev_children; c++) { 6176 tvd = vd->vdev_child[c]; 6177 vdev_remove_child(vd, tvd); 6178 tvd->vdev_id = rvd->vdev_children; 6179 vdev_add_child(rvd, tvd); 6180 vdev_config_dirty(tvd); 6181 } 6182 6183 if (nspares != 0) { 6184 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, 6185 ZPOOL_CONFIG_SPARES); 6186 spa_load_spares(spa); 6187 spa->spa_spares.sav_sync = B_TRUE; 6188 } 6189 6190 if (nl2cache != 0) { 6191 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, 6192 ZPOOL_CONFIG_L2CACHE); 6193 spa_load_l2cache(spa); 6194 spa->spa_l2cache.sav_sync = B_TRUE; 6195 } 6196 6197 /* 6198 * We have to be careful when adding new vdevs to an existing pool. 6199 * If other threads start allocating from these vdevs before we 6200 * sync the config cache, and we lose power, then upon reboot we may 6201 * fail to open the pool because there are DVAs that the config cache 6202 * can't translate. Therefore, we first add the vdevs without 6203 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); 6204 * and then let spa_config_update() initialize the new metaslabs. 6205 * 6206 * spa_load() checks for added-but-not-initialized vdevs, so that 6207 * if we lose power at any point in this sequence, the remaining 6208 * steps will be completed the next time we load the pool. 6209 */ 6210 (void) spa_vdev_exit(spa, vd, txg, 0); 6211 6212 mutex_enter(&spa_namespace_lock); 6213 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 6214 spa_event_notify(spa, NULL, NULL, ESC_ZFS_VDEV_ADD); 6215 mutex_exit(&spa_namespace_lock); 6216 6217 return (0); 6218 } 6219 6220 /* 6221 * Attach a device to a mirror. The arguments are the path to any device 6222 * in the mirror, and the nvroot for the new device. If the path specifies 6223 * a device that is not mirrored, we automatically insert the mirror vdev. 6224 * 6225 * If 'replacing' is specified, the new device is intended to replace the 6226 * existing device; in this case the two devices are made into their own 6227 * mirror using the 'replacing' vdev, which is functionally identical to 6228 * the mirror vdev (it actually reuses all the same ops) but has a few 6229 * extra rules: you can't attach to it after it's been created, and upon 6230 * completion of resilvering, the first disk (the one being replaced) 6231 * is automatically detached. 6232 */ 6233 int 6234 spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 6235 { 6236 uint64_t txg, dtl_max_txg; 6237 vdev_t *rvd = spa->spa_root_vdev; 6238 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; 6239 vdev_ops_t *pvops; 6240 char *oldvdpath, *newvdpath; 6241 int newvd_isspare; 6242 int error; 6243 6244 ASSERT(spa_writeable(spa)); 6245 6246 txg = spa_vdev_enter(spa); 6247 6248 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); 6249 6250 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 6251 if (spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT)) { 6252 error = (spa_has_checkpoint(spa)) ? 6253 ZFS_ERR_CHECKPOINT_EXISTS : ZFS_ERR_DISCARDING_CHECKPOINT; 6254 return (spa_vdev_exit(spa, NULL, txg, error)); 6255 } 6256 6257 if (spa->spa_vdev_removal != NULL) 6258 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 6259 6260 if (oldvd == NULL) 6261 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 6262 6263 if (!oldvd->vdev_ops->vdev_op_leaf) 6264 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 6265 6266 pvd = oldvd->vdev_parent; 6267 6268 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, 6269 VDEV_ALLOC_ATTACH)) != 0) 6270 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 6271 6272 if (newrootvd->vdev_children != 1) 6273 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 6274 6275 newvd = newrootvd->vdev_child[0]; 6276 6277 if (!newvd->vdev_ops->vdev_op_leaf) 6278 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 6279 6280 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) 6281 return (spa_vdev_exit(spa, newrootvd, txg, error)); 6282 6283 /* 6284 * Spares can't replace logs 6285 */ 6286 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) 6287 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 6288 6289 if (!replacing) { 6290 /* 6291 * For attach, the only allowable parent is a mirror or the root 6292 * vdev. 6293 */ 6294 if (pvd->vdev_ops != &vdev_mirror_ops && 6295 pvd->vdev_ops != &vdev_root_ops) 6296 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 6297 6298 pvops = &vdev_mirror_ops; 6299 } else { 6300 /* 6301 * Active hot spares can only be replaced by inactive hot 6302 * spares. 6303 */ 6304 if (pvd->vdev_ops == &vdev_spare_ops && 6305 oldvd->vdev_isspare && 6306 !spa_has_spare(spa, newvd->vdev_guid)) 6307 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 6308 6309 /* 6310 * If the source is a hot spare, and the parent isn't already a 6311 * spare, then we want to create a new hot spare. Otherwise, we 6312 * want to create a replacing vdev. The user is not allowed to 6313 * attach to a spared vdev child unless the 'isspare' state is 6314 * the same (spare replaces spare, non-spare replaces 6315 * non-spare). 6316 */ 6317 if (pvd->vdev_ops == &vdev_replacing_ops && 6318 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { 6319 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 6320 } else if (pvd->vdev_ops == &vdev_spare_ops && 6321 newvd->vdev_isspare != oldvd->vdev_isspare) { 6322 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 6323 } 6324 6325 if (newvd->vdev_isspare) 6326 pvops = &vdev_spare_ops; 6327 else 6328 pvops = &vdev_replacing_ops; 6329 } 6330 6331 /* 6332 * Make sure the new device is big enough. 6333 */ 6334 if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) 6335 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); 6336 6337 /* 6338 * The new device cannot have a higher alignment requirement 6339 * than the top-level vdev. 6340 */ 6341 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) 6342 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); 6343 6344 /* 6345 * If this is an in-place replacement, update oldvd's path and devid 6346 * to make it distinguishable from newvd, and unopenable from now on. 6347 */ 6348 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { 6349 spa_strfree(oldvd->vdev_path); 6350 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, 6351 KM_SLEEP); 6352 (void) sprintf(oldvd->vdev_path, "%s/%s", 6353 newvd->vdev_path, "old"); 6354 if (oldvd->vdev_devid != NULL) { 6355 spa_strfree(oldvd->vdev_devid); 6356 oldvd->vdev_devid = NULL; 6357 } 6358 } 6359 6360 /* mark the device being resilvered */ 6361 newvd->vdev_resilver_txg = txg; 6362 6363 /* 6364 * If the parent is not a mirror, or if we're replacing, insert the new 6365 * mirror/replacing/spare vdev above oldvd. 6366 */ 6367 if (pvd->vdev_ops != pvops) 6368 pvd = vdev_add_parent(oldvd, pvops); 6369 6370 ASSERT(pvd->vdev_top->vdev_parent == rvd); 6371 ASSERT(pvd->vdev_ops == pvops); 6372 ASSERT(oldvd->vdev_parent == pvd); 6373 6374 /* 6375 * Extract the new device from its root and add it to pvd. 6376 */ 6377 vdev_remove_child(newrootvd, newvd); 6378 newvd->vdev_id = pvd->vdev_children; 6379 newvd->vdev_crtxg = oldvd->vdev_crtxg; 6380 vdev_add_child(pvd, newvd); 6381 6382 tvd = newvd->vdev_top; 6383 ASSERT(pvd->vdev_top == tvd); 6384 ASSERT(tvd->vdev_parent == rvd); 6385 6386 vdev_config_dirty(tvd); 6387 6388 /* 6389 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account 6390 * for any dmu_sync-ed blocks. It will propagate upward when 6391 * spa_vdev_exit() calls vdev_dtl_reassess(). 6392 */ 6393 dtl_max_txg = txg + TXG_CONCURRENT_STATES; 6394 6395 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, 6396 dtl_max_txg - TXG_INITIAL); 6397 6398 if (newvd->vdev_isspare) { 6399 spa_spare_activate(newvd); 6400 spa_event_notify(spa, newvd, NULL, ESC_ZFS_VDEV_SPARE); 6401 } 6402 6403 oldvdpath = spa_strdup(oldvd->vdev_path); 6404 newvdpath = spa_strdup(newvd->vdev_path); 6405 newvd_isspare = newvd->vdev_isspare; 6406 6407 /* 6408 * Mark newvd's DTL dirty in this txg. 6409 */ 6410 vdev_dirty(tvd, VDD_DTL, newvd, txg); 6411 6412 /* 6413 * Schedule the resilver to restart in the future. We do this to 6414 * ensure that dmu_sync-ed blocks have been stitched into the 6415 * respective datasets. We do not do this if resilvers have been 6416 * deferred. 6417 */ 6418 if (dsl_scan_resilvering(spa_get_dsl(spa)) && 6419 spa_feature_is_enabled(spa, SPA_FEATURE_RESILVER_DEFER)) 6420 vdev_defer_resilver(newvd); 6421 else 6422 dsl_scan_restart_resilver(spa->spa_dsl_pool, dtl_max_txg); 6423 6424 if (spa->spa_bootfs) 6425 spa_event_notify(spa, newvd, NULL, ESC_ZFS_BOOTFS_VDEV_ATTACH); 6426 6427 spa_event_notify(spa, newvd, NULL, ESC_ZFS_VDEV_ATTACH); 6428 6429 /* 6430 * Commit the config 6431 */ 6432 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); 6433 6434 spa_history_log_internal(spa, "vdev attach", NULL, 6435 "%s vdev=%s %s vdev=%s", 6436 replacing && newvd_isspare ? "spare in" : 6437 replacing ? "replace" : "attach", newvdpath, 6438 replacing ? "for" : "to", oldvdpath); 6439 6440 spa_strfree(oldvdpath); 6441 spa_strfree(newvdpath); 6442 6443 return (0); 6444 } 6445 6446 /* 6447 * Detach a device from a mirror or replacing vdev. 6448 * 6449 * If 'replace_done' is specified, only detach if the parent 6450 * is a replacing vdev. 6451 */ 6452 int 6453 spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) 6454 { 6455 uint64_t txg; 6456 int error; 6457 vdev_t *rvd = spa->spa_root_vdev; 6458 vdev_t *vd, *pvd, *cvd, *tvd; 6459 boolean_t unspare = B_FALSE; 6460 uint64_t unspare_guid = 0; 6461 char *vdpath; 6462 6463 ASSERT(spa_writeable(spa)); 6464 6465 txg = spa_vdev_enter(spa); 6466 6467 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 6468 6469 /* 6470 * Besides being called directly from the userland through the 6471 * ioctl interface, spa_vdev_detach() can be potentially called 6472 * at the end of spa_vdev_resilver_done(). 6473 * 6474 * In the regular case, when we have a checkpoint this shouldn't 6475 * happen as we never empty the DTLs of a vdev during the scrub 6476 * [see comment in dsl_scan_done()]. Thus spa_vdev_resilvering_done() 6477 * should never get here when we have a checkpoint. 6478 * 6479 * That said, even in a case when we checkpoint the pool exactly 6480 * as spa_vdev_resilver_done() calls this function everything 6481 * should be fine as the resilver will return right away. 6482 */ 6483 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 6484 if (spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT)) { 6485 error = (spa_has_checkpoint(spa)) ? 6486 ZFS_ERR_CHECKPOINT_EXISTS : ZFS_ERR_DISCARDING_CHECKPOINT; 6487 return (spa_vdev_exit(spa, NULL, txg, error)); 6488 } 6489 6490 if (vd == NULL) 6491 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 6492 6493 if (!vd->vdev_ops->vdev_op_leaf) 6494 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 6495 6496 pvd = vd->vdev_parent; 6497 6498 /* 6499 * If the parent/child relationship is not as expected, don't do it. 6500 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing 6501 * vdev that's replacing B with C. The user's intent in replacing 6502 * is to go from M(A,B) to M(A,C). If the user decides to cancel 6503 * the replace by detaching C, the expected behavior is to end up 6504 * M(A,B). But suppose that right after deciding to detach C, 6505 * the replacement of B completes. We would have M(A,C), and then 6506 * ask to detach C, which would leave us with just A -- not what 6507 * the user wanted. To prevent this, we make sure that the 6508 * parent/child relationship hasn't changed -- in this example, 6509 * that C's parent is still the replacing vdev R. 6510 */ 6511 if (pvd->vdev_guid != pguid && pguid != 0) 6512 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 6513 6514 /* 6515 * Only 'replacing' or 'spare' vdevs can be replaced. 6516 */ 6517 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && 6518 pvd->vdev_ops != &vdev_spare_ops) 6519 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 6520 6521 ASSERT(pvd->vdev_ops != &vdev_spare_ops || 6522 spa_version(spa) >= SPA_VERSION_SPARES); 6523 6524 /* 6525 * Only mirror, replacing, and spare vdevs support detach. 6526 */ 6527 if (pvd->vdev_ops != &vdev_replacing_ops && 6528 pvd->vdev_ops != &vdev_mirror_ops && 6529 pvd->vdev_ops != &vdev_spare_ops) 6530 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 6531 6532 /* 6533 * If this device has the only valid copy of some data, 6534 * we cannot safely detach it. 6535 */ 6536 if (vdev_dtl_required(vd)) 6537 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 6538 6539 ASSERT(pvd->vdev_children >= 2); 6540 6541 /* 6542 * If we are detaching the second disk from a replacing vdev, then 6543 * check to see if we changed the original vdev's path to have "/old" 6544 * at the end in spa_vdev_attach(). If so, undo that change now. 6545 */ 6546 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && 6547 vd->vdev_path != NULL) { 6548 size_t len = strlen(vd->vdev_path); 6549 6550 for (int c = 0; c < pvd->vdev_children; c++) { 6551 cvd = pvd->vdev_child[c]; 6552 6553 if (cvd == vd || cvd->vdev_path == NULL) 6554 continue; 6555 6556 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && 6557 strcmp(cvd->vdev_path + len, "/old") == 0) { 6558 spa_strfree(cvd->vdev_path); 6559 cvd->vdev_path = spa_strdup(vd->vdev_path); 6560 break; 6561 } 6562 } 6563 } 6564 6565 /* 6566 * If we are detaching the original disk from a spare, then it implies 6567 * that the spare should become a real disk, and be removed from the 6568 * active spare list for the pool. 6569 */ 6570 if (pvd->vdev_ops == &vdev_spare_ops && 6571 vd->vdev_id == 0 && 6572 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) 6573 unspare = B_TRUE; 6574 6575 /* 6576 * Erase the disk labels so the disk can be used for other things. 6577 * This must be done after all other error cases are handled, 6578 * but before we disembowel vd (so we can still do I/O to it). 6579 * But if we can't do it, don't treat the error as fatal -- 6580 * it may be that the unwritability of the disk is the reason 6581 * it's being detached! 6582 */ 6583 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 6584 6585 /* 6586 * Remove vd from its parent and compact the parent's children. 6587 */ 6588 vdev_remove_child(pvd, vd); 6589 vdev_compact_children(pvd); 6590 6591 /* 6592 * Remember one of the remaining children so we can get tvd below. 6593 */ 6594 cvd = pvd->vdev_child[pvd->vdev_children - 1]; 6595 6596 /* 6597 * If we need to remove the remaining child from the list of hot spares, 6598 * do it now, marking the vdev as no longer a spare in the process. 6599 * We must do this before vdev_remove_parent(), because that can 6600 * change the GUID if it creates a new toplevel GUID. For a similar 6601 * reason, we must remove the spare now, in the same txg as the detach; 6602 * otherwise someone could attach a new sibling, change the GUID, and 6603 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. 6604 */ 6605 if (unspare) { 6606 ASSERT(cvd->vdev_isspare); 6607 spa_spare_remove(cvd); 6608 unspare_guid = cvd->vdev_guid; 6609 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); 6610 cvd->vdev_unspare = B_TRUE; 6611 } 6612 6613 /* 6614 * If the parent mirror/replacing vdev only has one child, 6615 * the parent is no longer needed. Remove it from the tree. 6616 */ 6617 if (pvd->vdev_children == 1) { 6618 if (pvd->vdev_ops == &vdev_spare_ops) 6619 cvd->vdev_unspare = B_FALSE; 6620 vdev_remove_parent(cvd); 6621 } 6622 6623 /* 6624 * We don't set tvd until now because the parent we just removed 6625 * may have been the previous top-level vdev. 6626 */ 6627 tvd = cvd->vdev_top; 6628 ASSERT(tvd->vdev_parent == rvd); 6629 6630 /* 6631 * Reevaluate the parent vdev state. 6632 */ 6633 vdev_propagate_state(cvd); 6634 6635 /* 6636 * If the 'autoexpand' property is set on the pool then automatically 6637 * try to expand the size of the pool. For example if the device we 6638 * just detached was smaller than the others, it may be possible to 6639 * add metaslabs (i.e. grow the pool). We need to reopen the vdev 6640 * first so that we can obtain the updated sizes of the leaf vdevs. 6641 */ 6642 if (spa->spa_autoexpand) { 6643 vdev_reopen(tvd); 6644 vdev_expand(tvd, txg); 6645 } 6646 6647 vdev_config_dirty(tvd); 6648 6649 /* 6650 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that 6651 * vd->vdev_detached is set and free vd's DTL object in syncing context. 6652 * But first make sure we're not on any *other* txg's DTL list, to 6653 * prevent vd from being accessed after it's freed. 6654 */ 6655 vdpath = spa_strdup(vd->vdev_path); 6656 for (int t = 0; t < TXG_SIZE; t++) 6657 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); 6658 vd->vdev_detached = B_TRUE; 6659 vdev_dirty(tvd, VDD_DTL, vd, txg); 6660 6661 spa_event_notify(spa, vd, NULL, ESC_ZFS_VDEV_REMOVE); 6662 6663 /* hang on to the spa before we release the lock */ 6664 spa_open_ref(spa, FTAG); 6665 6666 error = spa_vdev_exit(spa, vd, txg, 0); 6667 6668 spa_history_log_internal(spa, "detach", NULL, 6669 "vdev=%s", vdpath); 6670 spa_strfree(vdpath); 6671 6672 /* 6673 * If this was the removal of the original device in a hot spare vdev, 6674 * then we want to go through and remove the device from the hot spare 6675 * list of every other pool. 6676 */ 6677 if (unspare) { 6678 spa_t *altspa = NULL; 6679 6680 mutex_enter(&spa_namespace_lock); 6681 while ((altspa = spa_next(altspa)) != NULL) { 6682 if (altspa->spa_state != POOL_STATE_ACTIVE || 6683 altspa == spa) 6684 continue; 6685 6686 spa_open_ref(altspa, FTAG); 6687 mutex_exit(&spa_namespace_lock); 6688 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); 6689 mutex_enter(&spa_namespace_lock); 6690 spa_close(altspa, FTAG); 6691 } 6692 mutex_exit(&spa_namespace_lock); 6693 6694 /* search the rest of the vdevs for spares to remove */ 6695 spa_vdev_resilver_done(spa); 6696 } 6697 6698 /* all done with the spa; OK to release */ 6699 mutex_enter(&spa_namespace_lock); 6700 spa_close(spa, FTAG); 6701 mutex_exit(&spa_namespace_lock); 6702 6703 return (error); 6704 } 6705 6706 static int 6707 spa_vdev_initialize_impl(spa_t *spa, uint64_t guid, uint64_t cmd_type, 6708 list_t *vd_list) 6709 { 6710 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 6711 6712 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6713 6714 /* Look up vdev and ensure it's a leaf. */ 6715 vdev_t *vd = spa_lookup_by_guid(spa, guid, B_FALSE); 6716 if (vd == NULL || vd->vdev_detached) { 6717 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6718 return (SET_ERROR(ENODEV)); 6719 } else if (!vd->vdev_ops->vdev_op_leaf || !vdev_is_concrete(vd)) { 6720 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6721 return (SET_ERROR(EINVAL)); 6722 } else if (!vdev_writeable(vd)) { 6723 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6724 return (SET_ERROR(EROFS)); 6725 } 6726 mutex_enter(&vd->vdev_initialize_lock); 6727 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6728 6729 /* 6730 * When we activate an initialize action we check to see 6731 * if the vdev_initialize_thread is NULL. We do this instead 6732 * of using the vdev_initialize_state since there might be 6733 * a previous initialization process which has completed but 6734 * the thread is not exited. 6735 */ 6736 if (cmd_type == POOL_INITIALIZE_START && 6737 (vd->vdev_initialize_thread != NULL || 6738 vd->vdev_top->vdev_removing)) { 6739 mutex_exit(&vd->vdev_initialize_lock); 6740 return (SET_ERROR(EBUSY)); 6741 } else if (cmd_type == POOL_INITIALIZE_CANCEL && 6742 (vd->vdev_initialize_state != VDEV_INITIALIZE_ACTIVE && 6743 vd->vdev_initialize_state != VDEV_INITIALIZE_SUSPENDED)) { 6744 mutex_exit(&vd->vdev_initialize_lock); 6745 return (SET_ERROR(ESRCH)); 6746 } else if (cmd_type == POOL_INITIALIZE_SUSPEND && 6747 vd->vdev_initialize_state != VDEV_INITIALIZE_ACTIVE) { 6748 mutex_exit(&vd->vdev_initialize_lock); 6749 return (SET_ERROR(ESRCH)); 6750 } 6751 6752 switch (cmd_type) { 6753 case POOL_INITIALIZE_START: 6754 vdev_initialize(vd); 6755 break; 6756 case POOL_INITIALIZE_CANCEL: 6757 vdev_initialize_stop(vd, VDEV_INITIALIZE_CANCELED, vd_list); 6758 break; 6759 case POOL_INITIALIZE_SUSPEND: 6760 vdev_initialize_stop(vd, VDEV_INITIALIZE_SUSPENDED, vd_list); 6761 break; 6762 default: 6763 panic("invalid cmd_type %llu", (unsigned long long)cmd_type); 6764 } 6765 mutex_exit(&vd->vdev_initialize_lock); 6766 6767 return (0); 6768 } 6769 6770 int 6771 spa_vdev_initialize(spa_t *spa, nvlist_t *nv, uint64_t cmd_type, 6772 nvlist_t *vdev_errlist) 6773 { 6774 int total_errors = 0; 6775 list_t vd_list; 6776 6777 list_create(&vd_list, sizeof (vdev_t), 6778 offsetof(vdev_t, vdev_initialize_node)); 6779 6780 /* 6781 * We hold the namespace lock through the whole function 6782 * to prevent any changes to the pool while we're starting or 6783 * stopping initialization. The config and state locks are held so that 6784 * we can properly assess the vdev state before we commit to 6785 * the initializing operation. 6786 */ 6787 mutex_enter(&spa_namespace_lock); 6788 6789 for (nvpair_t *pair = nvlist_next_nvpair(nv, NULL); 6790 pair != NULL; pair = nvlist_next_nvpair(nv, pair)) { 6791 uint64_t vdev_guid = fnvpair_value_uint64(pair); 6792 6793 int error = spa_vdev_initialize_impl(spa, vdev_guid, cmd_type, 6794 &vd_list); 6795 if (error != 0) { 6796 char guid_as_str[MAXNAMELEN]; 6797 6798 (void) snprintf(guid_as_str, sizeof (guid_as_str), 6799 "%llu", (unsigned long long)vdev_guid); 6800 fnvlist_add_int64(vdev_errlist, guid_as_str, error); 6801 total_errors++; 6802 } 6803 } 6804 6805 /* Wait for all initialize threads to stop. */ 6806 vdev_initialize_stop_wait(spa, &vd_list); 6807 6808 /* Sync out the initializing state */ 6809 txg_wait_synced(spa->spa_dsl_pool, 0); 6810 mutex_exit(&spa_namespace_lock); 6811 6812 list_destroy(&vd_list); 6813 6814 return (total_errors); 6815 } 6816 6817 static int 6818 spa_vdev_trim_impl(spa_t *spa, uint64_t guid, uint64_t cmd_type, 6819 uint64_t rate, boolean_t partial, boolean_t secure, list_t *vd_list) 6820 { 6821 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 6822 6823 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6824 6825 /* Look up vdev and ensure it's a leaf. */ 6826 vdev_t *vd = spa_lookup_by_guid(spa, guid, B_FALSE); 6827 if (vd == NULL || vd->vdev_detached) { 6828 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6829 return (SET_ERROR(ENODEV)); 6830 } else if (!vd->vdev_ops->vdev_op_leaf || !vdev_is_concrete(vd)) { 6831 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6832 return (SET_ERROR(EINVAL)); 6833 } else if (!vdev_writeable(vd)) { 6834 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6835 return (SET_ERROR(EROFS)); 6836 } else if (!vd->vdev_has_trim) { 6837 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6838 return (SET_ERROR(EOPNOTSUPP)); 6839 } else if (secure && !vd->vdev_has_securetrim) { 6840 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6841 return (SET_ERROR(EOPNOTSUPP)); 6842 } 6843 mutex_enter(&vd->vdev_trim_lock); 6844 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6845 6846 /* 6847 * When we activate a TRIM action we check to see if the 6848 * vdev_trim_thread is NULL. We do this instead of using the 6849 * vdev_trim_state since there might be a previous TRIM process 6850 * which has completed but the thread is not exited. 6851 */ 6852 if (cmd_type == POOL_TRIM_START && 6853 (vd->vdev_trim_thread != NULL || vd->vdev_top->vdev_removing)) { 6854 mutex_exit(&vd->vdev_trim_lock); 6855 return (SET_ERROR(EBUSY)); 6856 } else if (cmd_type == POOL_TRIM_CANCEL && 6857 (vd->vdev_trim_state != VDEV_TRIM_ACTIVE && 6858 vd->vdev_trim_state != VDEV_TRIM_SUSPENDED)) { 6859 mutex_exit(&vd->vdev_trim_lock); 6860 return (SET_ERROR(ESRCH)); 6861 } else if (cmd_type == POOL_TRIM_SUSPEND && 6862 vd->vdev_trim_state != VDEV_TRIM_ACTIVE) { 6863 mutex_exit(&vd->vdev_trim_lock); 6864 return (SET_ERROR(ESRCH)); 6865 } 6866 6867 switch (cmd_type) { 6868 case POOL_TRIM_START: 6869 vdev_trim(vd, rate, partial, secure); 6870 break; 6871 case POOL_TRIM_CANCEL: 6872 vdev_trim_stop(vd, VDEV_TRIM_CANCELED, vd_list); 6873 break; 6874 case POOL_TRIM_SUSPEND: 6875 vdev_trim_stop(vd, VDEV_TRIM_SUSPENDED, vd_list); 6876 break; 6877 default: 6878 panic("invalid cmd_type %llu", (unsigned long long)cmd_type); 6879 } 6880 mutex_exit(&vd->vdev_trim_lock); 6881 6882 return (0); 6883 } 6884 6885 /* 6886 * Initiates a manual TRIM for the requested vdevs. This kicks off individual 6887 * TRIM threads for each child vdev. These threads pass over all of the free 6888 * space in the vdev's metaslabs and issues TRIM commands for that space. 6889 */ 6890 int 6891 spa_vdev_trim(spa_t *spa, nvlist_t *nv, uint64_t cmd_type, uint64_t rate, 6892 boolean_t partial, boolean_t secure, nvlist_t *vdev_errlist) 6893 { 6894 int total_errors = 0; 6895 list_t vd_list; 6896 6897 list_create(&vd_list, sizeof (vdev_t), 6898 offsetof(vdev_t, vdev_trim_node)); 6899 6900 /* 6901 * We hold the namespace lock through the whole function 6902 * to prevent any changes to the pool while we're starting or 6903 * stopping TRIM. The config and state locks are held so that 6904 * we can properly assess the vdev state before we commit to 6905 * the TRIM operation. 6906 */ 6907 mutex_enter(&spa_namespace_lock); 6908 6909 for (nvpair_t *pair = nvlist_next_nvpair(nv, NULL); 6910 pair != NULL; pair = nvlist_next_nvpair(nv, pair)) { 6911 uint64_t vdev_guid = fnvpair_value_uint64(pair); 6912 6913 int error = spa_vdev_trim_impl(spa, vdev_guid, cmd_type, 6914 rate, partial, secure, &vd_list); 6915 if (error != 0) { 6916 char guid_as_str[MAXNAMELEN]; 6917 6918 (void) snprintf(guid_as_str, sizeof (guid_as_str), 6919 "%llu", (unsigned long long)vdev_guid); 6920 fnvlist_add_int64(vdev_errlist, guid_as_str, error); 6921 total_errors++; 6922 } 6923 } 6924 6925 /* Wait for all TRIM threads to stop. */ 6926 vdev_trim_stop_wait(spa, &vd_list); 6927 6928 /* Sync out the TRIM state */ 6929 txg_wait_synced(spa->spa_dsl_pool, 0); 6930 mutex_exit(&spa_namespace_lock); 6931 6932 list_destroy(&vd_list); 6933 6934 return (total_errors); 6935 } 6936 6937 /* 6938 * Split a set of devices from their mirrors, and create a new pool from them. 6939 */ 6940 int 6941 spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 6942 nvlist_t *props, boolean_t exp) 6943 { 6944 int error = 0; 6945 uint64_t txg, *glist; 6946 spa_t *newspa; 6947 uint_t c, children, lastlog; 6948 nvlist_t **child, *nvl, *tmp; 6949 dmu_tx_t *tx; 6950 char *altroot = NULL; 6951 vdev_t *rvd, **vml = NULL; /* vdev modify list */ 6952 boolean_t activate_slog; 6953 6954 ASSERT(spa_writeable(spa)); 6955 6956 txg = spa_vdev_enter(spa); 6957 6958 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 6959 if (spa_feature_is_active(spa, SPA_FEATURE_POOL_CHECKPOINT)) { 6960 error = (spa_has_checkpoint(spa)) ? 6961 ZFS_ERR_CHECKPOINT_EXISTS : ZFS_ERR_DISCARDING_CHECKPOINT; 6962 return (spa_vdev_exit(spa, NULL, txg, error)); 6963 } 6964 6965 /* clear the log and flush everything up to now */ 6966 activate_slog = spa_passivate_log(spa); 6967 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 6968 error = spa_reset_logs(spa); 6969 txg = spa_vdev_config_enter(spa); 6970 6971 if (activate_slog) 6972 spa_activate_log(spa); 6973 6974 if (error != 0) 6975 return (spa_vdev_exit(spa, NULL, txg, error)); 6976 6977 /* check new spa name before going any further */ 6978 if (spa_lookup(newname) != NULL) 6979 return (spa_vdev_exit(spa, NULL, txg, EEXIST)); 6980 6981 /* 6982 * scan through all the children to ensure they're all mirrors 6983 */ 6984 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || 6985 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, 6986 &children) != 0) 6987 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 6988 6989 /* first, check to ensure we've got the right child count */ 6990 rvd = spa->spa_root_vdev; 6991 lastlog = 0; 6992 for (c = 0; c < rvd->vdev_children; c++) { 6993 vdev_t *vd = rvd->vdev_child[c]; 6994 6995 /* don't count the holes & logs as children */ 6996 if (vd->vdev_islog || !vdev_is_concrete(vd)) { 6997 if (lastlog == 0) 6998 lastlog = c; 6999 continue; 7000 } 7001 7002 lastlog = 0; 7003 } 7004 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) 7005 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 7006 7007 /* next, ensure no spare or cache devices are part of the split */ 7008 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || 7009 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) 7010 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 7011 7012 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); 7013 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); 7014 7015 /* then, loop over each vdev and validate it */ 7016 for (c = 0; c < children; c++) { 7017 uint64_t is_hole = 0; 7018 7019 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 7020 &is_hole); 7021 7022 if (is_hole != 0) { 7023 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || 7024 spa->spa_root_vdev->vdev_child[c]->vdev_islog) { 7025 continue; 7026 } else { 7027 error = SET_ERROR(EINVAL); 7028 break; 7029 } 7030 } 7031 7032 /* which disk is going to be split? */ 7033 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, 7034 &glist[c]) != 0) { 7035 error = SET_ERROR(EINVAL); 7036 break; 7037 } 7038 7039 /* look it up in the spa */ 7040 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); 7041 if (vml[c] == NULL) { 7042 error = SET_ERROR(ENODEV); 7043 break; 7044 } 7045 7046 /* make sure there's nothing stopping the split */ 7047 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || 7048 vml[c]->vdev_islog || 7049 !vdev_is_concrete(vml[c]) || 7050 vml[c]->vdev_isspare || 7051 vml[c]->vdev_isl2cache || 7052 !vdev_writeable(vml[c]) || 7053 vml[c]->vdev_children != 0 || 7054 vml[c]->vdev_state != VDEV_STATE_HEALTHY || 7055 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { 7056 error = SET_ERROR(EINVAL); 7057 break; 7058 } 7059 7060 if (vdev_dtl_required(vml[c])) { 7061 error = SET_ERROR(EBUSY); 7062 break; 7063 } 7064 7065 /* we need certain info from the top level */ 7066 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, 7067 vml[c]->vdev_top->vdev_ms_array) == 0); 7068 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, 7069 vml[c]->vdev_top->vdev_ms_shift) == 0); 7070 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, 7071 vml[c]->vdev_top->vdev_asize) == 0); 7072 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, 7073 vml[c]->vdev_top->vdev_ashift) == 0); 7074 7075 /* transfer per-vdev ZAPs */ 7076 ASSERT3U(vml[c]->vdev_leaf_zap, !=, 0); 7077 VERIFY0(nvlist_add_uint64(child[c], 7078 ZPOOL_CONFIG_VDEV_LEAF_ZAP, vml[c]->vdev_leaf_zap)); 7079 7080 ASSERT3U(vml[c]->vdev_top->vdev_top_zap, !=, 0); 7081 VERIFY0(nvlist_add_uint64(child[c], 7082 ZPOOL_CONFIG_VDEV_TOP_ZAP, 7083 vml[c]->vdev_parent->vdev_top_zap)); 7084 } 7085 7086 if (error != 0) { 7087 kmem_free(vml, children * sizeof (vdev_t *)); 7088 kmem_free(glist, children * sizeof (uint64_t)); 7089 return (spa_vdev_exit(spa, NULL, txg, error)); 7090 } 7091 7092 /* stop writers from using the disks */ 7093 for (c = 0; c < children; c++) { 7094 if (vml[c] != NULL) 7095 vml[c]->vdev_offline = B_TRUE; 7096 } 7097 vdev_reopen(spa->spa_root_vdev); 7098 7099 /* 7100 * Temporarily record the splitting vdevs in the spa config. This 7101 * will disappear once the config is regenerated. 7102 */ 7103 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 7104 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 7105 glist, children) == 0); 7106 kmem_free(glist, children * sizeof (uint64_t)); 7107 7108 mutex_enter(&spa->spa_props_lock); 7109 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, 7110 nvl) == 0); 7111 mutex_exit(&spa->spa_props_lock); 7112 spa->spa_config_splitting = nvl; 7113 vdev_config_dirty(spa->spa_root_vdev); 7114 7115 /* configure and create the new pool */ 7116 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); 7117 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 7118 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); 7119 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 7120 spa_version(spa)) == 0); 7121 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 7122 spa->spa_config_txg) == 0); 7123 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 7124 spa_generate_guid(NULL)) == 0); 7125 VERIFY0(nvlist_add_boolean(config, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)); 7126 (void) nvlist_lookup_string(props, 7127 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 7128 7129 /* add the new pool to the namespace */ 7130 newspa = spa_add(newname, config, altroot); 7131 newspa->spa_avz_action = AVZ_ACTION_REBUILD; 7132 newspa->spa_config_txg = spa->spa_config_txg; 7133 spa_set_log_state(newspa, SPA_LOG_CLEAR); 7134 7135 /* release the spa config lock, retaining the namespace lock */ 7136 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 7137 7138 if (zio_injection_enabled) 7139 zio_handle_panic_injection(spa, FTAG, 1); 7140 7141 spa_activate(newspa, spa_mode_global); 7142 spa_async_suspend(newspa); 7143 7144 /* 7145 * Temporarily stop the initializing and TRIM activity. We set the 7146 * state to ACTIVE so that we know to resume initializing or TRIM 7147 * once the split has completed. 7148 */ 7149 list_t vd_initialize_list; 7150 list_create(&vd_initialize_list, sizeof (vdev_t), 7151 offsetof(vdev_t, vdev_initialize_node)); 7152 7153 list_t vd_trim_list; 7154 list_create(&vd_trim_list, sizeof (vdev_t), 7155 offsetof(vdev_t, vdev_trim_node)); 7156 7157 for (c = 0; c < children; c++) { 7158 if (vml[c] != NULL) { 7159 mutex_enter(&vml[c]->vdev_initialize_lock); 7160 vdev_initialize_stop(vml[c], 7161 VDEV_INITIALIZE_ACTIVE, &vd_initialize_list); 7162 mutex_exit(&vml[c]->vdev_initialize_lock); 7163 7164 mutex_enter(&vml[c]->vdev_trim_lock); 7165 vdev_trim_stop(vml[c], VDEV_TRIM_ACTIVE, &vd_trim_list); 7166 mutex_exit(&vml[c]->vdev_trim_lock); 7167 } 7168 } 7169 7170 vdev_initialize_stop_wait(spa, &vd_initialize_list); 7171 vdev_trim_stop_wait(spa, &vd_trim_list); 7172 7173 list_destroy(&vd_initialize_list); 7174 list_destroy(&vd_trim_list); 7175 7176 newspa->spa_config_source = SPA_CONFIG_SRC_SPLIT; 7177 7178 /* create the new pool from the disks of the original pool */ 7179 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE); 7180 if (error) 7181 goto out; 7182 7183 /* if that worked, generate a real config for the new pool */ 7184 if (newspa->spa_root_vdev != NULL) { 7185 VERIFY(nvlist_alloc(&newspa->spa_config_splitting, 7186 NV_UNIQUE_NAME, KM_SLEEP) == 0); 7187 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, 7188 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); 7189 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, 7190 B_TRUE)); 7191 } 7192 7193 /* set the props */ 7194 if (props != NULL) { 7195 spa_configfile_set(newspa, props, B_FALSE); 7196 error = spa_prop_set(newspa, props); 7197 if (error) 7198 goto out; 7199 } 7200 7201 /* flush everything */ 7202 txg = spa_vdev_config_enter(newspa); 7203 vdev_config_dirty(newspa->spa_root_vdev); 7204 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); 7205 7206 if (zio_injection_enabled) 7207 zio_handle_panic_injection(spa, FTAG, 2); 7208 7209 spa_async_resume(newspa); 7210 7211 /* finally, update the original pool's config */ 7212 txg = spa_vdev_config_enter(spa); 7213 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 7214 error = dmu_tx_assign(tx, TXG_WAIT); 7215 if (error != 0) 7216 dmu_tx_abort(tx); 7217 for (c = 0; c < children; c++) { 7218 if (vml[c] != NULL) { 7219 vdev_split(vml[c]); 7220 if (error == 0) 7221 spa_history_log_internal(spa, "detach", tx, 7222 "vdev=%s", vml[c]->vdev_path); 7223 7224 vdev_free(vml[c]); 7225 } 7226 } 7227 spa->spa_avz_action = AVZ_ACTION_REBUILD; 7228 vdev_config_dirty(spa->spa_root_vdev); 7229 spa->spa_config_splitting = NULL; 7230 nvlist_free(nvl); 7231 if (error == 0) 7232 dmu_tx_commit(tx); 7233 (void) spa_vdev_exit(spa, NULL, txg, 0); 7234 7235 if (zio_injection_enabled) 7236 zio_handle_panic_injection(spa, FTAG, 3); 7237 7238 /* split is complete; log a history record */ 7239 spa_history_log_internal(newspa, "split", NULL, 7240 "from pool %s", spa_name(spa)); 7241 7242 kmem_free(vml, children * sizeof (vdev_t *)); 7243 7244 /* if we're not going to mount the filesystems in userland, export */ 7245 if (exp) 7246 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, 7247 B_FALSE, B_FALSE); 7248 7249 return (error); 7250 7251 out: 7252 spa_unload(newspa); 7253 spa_deactivate(newspa); 7254 spa_remove(newspa); 7255 7256 txg = spa_vdev_config_enter(spa); 7257 7258 /* re-online all offlined disks */ 7259 for (c = 0; c < children; c++) { 7260 if (vml[c] != NULL) 7261 vml[c]->vdev_offline = B_FALSE; 7262 } 7263 7264 /* restart initializing or trimming disks as necessary */ 7265 spa_async_request(spa, SPA_ASYNC_INITIALIZE_RESTART); 7266 spa_async_request(spa, SPA_ASYNC_TRIM_RESTART); 7267 spa_async_request(spa, SPA_ASYNC_AUTOTRIM_RESTART); 7268 7269 vdev_reopen(spa->spa_root_vdev); 7270 7271 nvlist_free(spa->spa_config_splitting); 7272 spa->spa_config_splitting = NULL; 7273 (void) spa_vdev_exit(spa, NULL, txg, error); 7274 7275 kmem_free(vml, children * sizeof (vdev_t *)); 7276 return (error); 7277 } 7278 7279 /* 7280 * Find any device that's done replacing, or a vdev marked 'unspare' that's 7281 * currently spared, so we can detach it. 7282 */ 7283 static vdev_t * 7284 spa_vdev_resilver_done_hunt(vdev_t *vd) 7285 { 7286 vdev_t *newvd, *oldvd; 7287 7288 for (int c = 0; c < vd->vdev_children; c++) { 7289 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); 7290 if (oldvd != NULL) 7291 return (oldvd); 7292 } 7293 7294 /* 7295 * Check for a completed replacement. We always consider the first 7296 * vdev in the list to be the oldest vdev, and the last one to be 7297 * the newest (see spa_vdev_attach() for how that works). In 7298 * the case where the newest vdev is faulted, we will not automatically 7299 * remove it after a resilver completes. This is OK as it will require 7300 * user intervention to determine which disk the admin wishes to keep. 7301 */ 7302 if (vd->vdev_ops == &vdev_replacing_ops) { 7303 ASSERT(vd->vdev_children > 1); 7304 7305 newvd = vd->vdev_child[vd->vdev_children - 1]; 7306 oldvd = vd->vdev_child[0]; 7307 7308 if (vdev_dtl_empty(newvd, DTL_MISSING) && 7309 vdev_dtl_empty(newvd, DTL_OUTAGE) && 7310 !vdev_dtl_required(oldvd)) 7311 return (oldvd); 7312 } 7313 7314 /* 7315 * Check for a completed resilver with the 'unspare' flag set. 7316 * Also potentially update faulted state. 7317 */ 7318 if (vd->vdev_ops == &vdev_spare_ops) { 7319 vdev_t *first = vd->vdev_child[0]; 7320 vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; 7321 7322 if (last->vdev_unspare) { 7323 oldvd = first; 7324 newvd = last; 7325 } else if (first->vdev_unspare) { 7326 oldvd = last; 7327 newvd = first; 7328 } else { 7329 oldvd = NULL; 7330 } 7331 7332 if (oldvd != NULL && 7333 vdev_dtl_empty(newvd, DTL_MISSING) && 7334 vdev_dtl_empty(newvd, DTL_OUTAGE) && 7335 !vdev_dtl_required(oldvd)) 7336 return (oldvd); 7337 7338 vdev_propagate_state(vd); 7339 7340 /* 7341 * If there are more than two spares attached to a disk, 7342 * and those spares are not required, then we want to 7343 * attempt to free them up now so that they can be used 7344 * by other pools. Once we're back down to a single 7345 * disk+spare, we stop removing them. 7346 */ 7347 if (vd->vdev_children > 2) { 7348 newvd = vd->vdev_child[1]; 7349 7350 if (newvd->vdev_isspare && last->vdev_isspare && 7351 vdev_dtl_empty(last, DTL_MISSING) && 7352 vdev_dtl_empty(last, DTL_OUTAGE) && 7353 !vdev_dtl_required(newvd)) 7354 return (newvd); 7355 } 7356 } 7357 7358 return (NULL); 7359 } 7360 7361 static void 7362 spa_vdev_resilver_done(spa_t *spa) 7363 { 7364 vdev_t *vd, *pvd, *ppvd; 7365 uint64_t guid, sguid, pguid, ppguid; 7366 7367 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 7368 7369 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { 7370 pvd = vd->vdev_parent; 7371 ppvd = pvd->vdev_parent; 7372 guid = vd->vdev_guid; 7373 pguid = pvd->vdev_guid; 7374 ppguid = ppvd->vdev_guid; 7375 sguid = 0; 7376 /* 7377 * If we have just finished replacing a hot spared device, then 7378 * we need to detach the parent's first child (the original hot 7379 * spare) as well. 7380 */ 7381 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && 7382 ppvd->vdev_children == 2) { 7383 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); 7384 sguid = ppvd->vdev_child[1]->vdev_guid; 7385 } 7386 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd)); 7387 7388 spa_config_exit(spa, SCL_ALL, FTAG); 7389 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) 7390 return; 7391 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) 7392 return; 7393 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 7394 } 7395 7396 spa_config_exit(spa, SCL_ALL, FTAG); 7397 } 7398 7399 /* 7400 * Update the stored path or FRU for this vdev. 7401 */ 7402 int 7403 spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, 7404 boolean_t ispath) 7405 { 7406 vdev_t *vd; 7407 boolean_t sync = B_FALSE; 7408 7409 ASSERT(spa_writeable(spa)); 7410 7411 spa_vdev_state_enter(spa, SCL_ALL); 7412 7413 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 7414 return (spa_vdev_state_exit(spa, NULL, ENOENT)); 7415 7416 if (!vd->vdev_ops->vdev_op_leaf) 7417 return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 7418 7419 if (ispath) { 7420 if (strcmp(value, vd->vdev_path) != 0) { 7421 spa_strfree(vd->vdev_path); 7422 vd->vdev_path = spa_strdup(value); 7423 sync = B_TRUE; 7424 } 7425 } else { 7426 if (vd->vdev_fru == NULL) { 7427 vd->vdev_fru = spa_strdup(value); 7428 sync = B_TRUE; 7429 } else if (strcmp(value, vd->vdev_fru) != 0) { 7430 spa_strfree(vd->vdev_fru); 7431 vd->vdev_fru = spa_strdup(value); 7432 sync = B_TRUE; 7433 } 7434 } 7435 7436 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); 7437 } 7438 7439 int 7440 spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) 7441 { 7442 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); 7443 } 7444 7445 int 7446 spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) 7447 { 7448 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); 7449 } 7450 7451 /* 7452 * ========================================================================== 7453 * SPA Scanning 7454 * ========================================================================== 7455 */ 7456 int 7457 spa_scrub_pause_resume(spa_t *spa, pool_scrub_cmd_t cmd) 7458 { 7459 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 7460 7461 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 7462 return (SET_ERROR(EBUSY)); 7463 7464 return (dsl_scrub_set_pause_resume(spa->spa_dsl_pool, cmd)); 7465 } 7466 7467 int 7468 spa_scan_stop(spa_t *spa) 7469 { 7470 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 7471 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 7472 return (SET_ERROR(EBUSY)); 7473 return (dsl_scan_cancel(spa->spa_dsl_pool)); 7474 } 7475 7476 int 7477 spa_scan(spa_t *spa, pool_scan_func_t func) 7478 { 7479 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 7480 7481 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) 7482 return (SET_ERROR(ENOTSUP)); 7483 7484 if (func == POOL_SCAN_RESILVER && 7485 !spa_feature_is_enabled(spa, SPA_FEATURE_RESILVER_DEFER)) 7486 return (SET_ERROR(ENOTSUP)); 7487 7488 /* 7489 * If a resilver was requested, but there is no DTL on a 7490 * writeable leaf device, we have nothing to do. 7491 */ 7492 if (func == POOL_SCAN_RESILVER && 7493 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { 7494 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); 7495 return (0); 7496 } 7497 7498 return (dsl_scan(spa->spa_dsl_pool, func)); 7499 } 7500 7501 /* 7502 * ========================================================================== 7503 * SPA async task processing 7504 * ========================================================================== 7505 */ 7506 7507 static void 7508 spa_async_remove(spa_t *spa, vdev_t *vd) 7509 { 7510 if (vd->vdev_remove_wanted) { 7511 vd->vdev_remove_wanted = B_FALSE; 7512 vd->vdev_delayed_close = B_FALSE; 7513 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); 7514 7515 /* 7516 * We want to clear the stats, but we don't want to do a full 7517 * vdev_clear() as that will cause us to throw away 7518 * degraded/faulted state as well as attempt to reopen the 7519 * device, all of which is a waste. 7520 */ 7521 vd->vdev_stat.vs_read_errors = 0; 7522 vd->vdev_stat.vs_write_errors = 0; 7523 vd->vdev_stat.vs_checksum_errors = 0; 7524 7525 vdev_state_dirty(vd->vdev_top); 7526 } 7527 7528 for (int c = 0; c < vd->vdev_children; c++) 7529 spa_async_remove(spa, vd->vdev_child[c]); 7530 } 7531 7532 static void 7533 spa_async_probe(spa_t *spa, vdev_t *vd) 7534 { 7535 if (vd->vdev_probe_wanted) { 7536 vd->vdev_probe_wanted = B_FALSE; 7537 vdev_reopen(vd); /* vdev_open() does the actual probe */ 7538 } 7539 7540 for (int c = 0; c < vd->vdev_children; c++) 7541 spa_async_probe(spa, vd->vdev_child[c]); 7542 } 7543 7544 static void 7545 spa_async_autoexpand(spa_t *spa, vdev_t *vd) 7546 { 7547 char *physpath; 7548 7549 if (!spa->spa_autoexpand) 7550 return; 7551 7552 for (int c = 0; c < vd->vdev_children; c++) { 7553 vdev_t *cvd = vd->vdev_child[c]; 7554 spa_async_autoexpand(spa, cvd); 7555 } 7556 7557 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) 7558 return; 7559 7560 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 7561 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); 7562 7563 zfs_post_dle_sysevent(physpath); 7564 7565 kmem_free(physpath, MAXPATHLEN); 7566 } 7567 7568 static void 7569 spa_async_thread(void *arg) 7570 { 7571 spa_t *spa = (spa_t *)arg; 7572 dsl_pool_t *dp = spa->spa_dsl_pool; 7573 int tasks; 7574 7575 ASSERT(spa->spa_sync_on); 7576 7577 mutex_enter(&spa->spa_async_lock); 7578 tasks = spa->spa_async_tasks; 7579 spa->spa_async_tasks = 0; 7580 mutex_exit(&spa->spa_async_lock); 7581 7582 /* 7583 * See if the config needs to be updated. 7584 */ 7585 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { 7586 uint64_t old_space, new_space; 7587 7588 mutex_enter(&spa_namespace_lock); 7589 old_space = metaslab_class_get_space(spa_normal_class(spa)); 7590 old_space += metaslab_class_get_space(spa_special_class(spa)); 7591 old_space += metaslab_class_get_space(spa_dedup_class(spa)); 7592 7593 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 7594 7595 new_space = metaslab_class_get_space(spa_normal_class(spa)); 7596 new_space += metaslab_class_get_space(spa_special_class(spa)); 7597 new_space += metaslab_class_get_space(spa_dedup_class(spa)); 7598 mutex_exit(&spa_namespace_lock); 7599 7600 /* 7601 * If the pool grew as a result of the config update, 7602 * then log an internal history event. 7603 */ 7604 if (new_space != old_space) { 7605 spa_history_log_internal(spa, "vdev online", NULL, 7606 "pool '%s' size: %llu(+%llu)", 7607 spa_name(spa), new_space, new_space - old_space); 7608 } 7609 } 7610 7611 /* 7612 * See if any devices need to be marked REMOVED. 7613 */ 7614 if (tasks & SPA_ASYNC_REMOVE) { 7615 spa_vdev_state_enter(spa, SCL_NONE); 7616 spa_async_remove(spa, spa->spa_root_vdev); 7617 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) 7618 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); 7619 for (int i = 0; i < spa->spa_spares.sav_count; i++) 7620 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); 7621 (void) spa_vdev_state_exit(spa, NULL, 0); 7622 } 7623 7624 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { 7625 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 7626 spa_async_autoexpand(spa, spa->spa_root_vdev); 7627 spa_config_exit(spa, SCL_CONFIG, FTAG); 7628 } 7629 7630 /* 7631 * See if any devices need to be probed. 7632 */ 7633 if (tasks & SPA_ASYNC_PROBE) { 7634 spa_vdev_state_enter(spa, SCL_NONE); 7635 spa_async_probe(spa, spa->spa_root_vdev); 7636 for (int i = 0; i < spa->spa_spares.sav_count; i++) 7637 spa_async_probe(spa, spa->spa_spares.sav_vdevs[i]); 7638 (void) spa_vdev_state_exit(spa, NULL, 0); 7639 } 7640 7641 /* 7642 * If any devices are done replacing, detach them. 7643 */ 7644 if (tasks & SPA_ASYNC_RESILVER_DONE) 7645 spa_vdev_resilver_done(spa); 7646 7647 /* 7648 * Kick off a resilver. 7649 */ 7650 if (tasks & SPA_ASYNC_RESILVER && 7651 (!dsl_scan_resilvering(dp) || 7652 !spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_RESILVER_DEFER))) 7653 dsl_scan_restart_resilver(dp, 0); 7654 7655 if (tasks & SPA_ASYNC_INITIALIZE_RESTART) { 7656 mutex_enter(&spa_namespace_lock); 7657 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 7658 vdev_initialize_restart(spa->spa_root_vdev); 7659 spa_config_exit(spa, SCL_CONFIG, FTAG); 7660 mutex_exit(&spa_namespace_lock); 7661 } 7662 7663 if (tasks & SPA_ASYNC_TRIM_RESTART) { 7664 mutex_enter(&spa_namespace_lock); 7665 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 7666 vdev_trim_restart(spa->spa_root_vdev); 7667 spa_config_exit(spa, SCL_CONFIG, FTAG); 7668 mutex_exit(&spa_namespace_lock); 7669 } 7670 7671 if (tasks & SPA_ASYNC_AUTOTRIM_RESTART) { 7672 mutex_enter(&spa_namespace_lock); 7673 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 7674 vdev_autotrim_restart(spa); 7675 spa_config_exit(spa, SCL_CONFIG, FTAG); 7676 mutex_exit(&spa_namespace_lock); 7677 } 7678 7679 /* 7680 * Kick off L2 cache rebuilding. 7681 */ 7682 if (tasks & SPA_ASYNC_L2CACHE_REBUILD) { 7683 mutex_enter(&spa_namespace_lock); 7684 spa_config_enter(spa, SCL_L2ARC, FTAG, RW_READER); 7685 l2arc_spa_rebuild_start(spa); 7686 spa_config_exit(spa, SCL_L2ARC, FTAG); 7687 mutex_exit(&spa_namespace_lock); 7688 } 7689 7690 /* 7691 * Let the world know that we're done. 7692 */ 7693 mutex_enter(&spa->spa_async_lock); 7694 spa->spa_async_thread = NULL; 7695 cv_broadcast(&spa->spa_async_cv); 7696 mutex_exit(&spa->spa_async_lock); 7697 thread_exit(); 7698 } 7699 7700 void 7701 spa_async_suspend(spa_t *spa) 7702 { 7703 mutex_enter(&spa->spa_async_lock); 7704 spa->spa_async_suspended++; 7705 while (spa->spa_async_thread != NULL) 7706 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); 7707 mutex_exit(&spa->spa_async_lock); 7708 7709 spa_vdev_remove_suspend(spa); 7710 7711 zthr_t *condense_thread = spa->spa_condense_zthr; 7712 if (condense_thread != NULL) 7713 zthr_cancel(condense_thread); 7714 7715 zthr_t *discard_thread = spa->spa_checkpoint_discard_zthr; 7716 if (discard_thread != NULL) 7717 zthr_cancel(discard_thread); 7718 } 7719 7720 void 7721 spa_async_resume(spa_t *spa) 7722 { 7723 mutex_enter(&spa->spa_async_lock); 7724 ASSERT(spa->spa_async_suspended != 0); 7725 spa->spa_async_suspended--; 7726 mutex_exit(&spa->spa_async_lock); 7727 spa_restart_removal(spa); 7728 7729 zthr_t *condense_thread = spa->spa_condense_zthr; 7730 if (condense_thread != NULL) 7731 zthr_resume(condense_thread); 7732 7733 zthr_t *discard_thread = spa->spa_checkpoint_discard_zthr; 7734 if (discard_thread != NULL) 7735 zthr_resume(discard_thread); 7736 } 7737 7738 static boolean_t 7739 spa_async_tasks_pending(spa_t *spa) 7740 { 7741 uint_t non_config_tasks; 7742 uint_t config_task; 7743 boolean_t config_task_suspended; 7744 7745 non_config_tasks = spa->spa_async_tasks & ~SPA_ASYNC_CONFIG_UPDATE; 7746 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; 7747 if (spa->spa_ccw_fail_time == 0) { 7748 config_task_suspended = B_FALSE; 7749 } else { 7750 config_task_suspended = 7751 (gethrtime() - spa->spa_ccw_fail_time) < 7752 (zfs_ccw_retry_interval * NANOSEC); 7753 } 7754 7755 return (non_config_tasks || (config_task && !config_task_suspended)); 7756 } 7757 7758 static void 7759 spa_async_dispatch(spa_t *spa) 7760 { 7761 mutex_enter(&spa->spa_async_lock); 7762 if (spa_async_tasks_pending(spa) && 7763 !spa->spa_async_suspended && 7764 spa->spa_async_thread == NULL && 7765 rootdir != NULL) 7766 spa->spa_async_thread = thread_create(NULL, 0, 7767 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); 7768 mutex_exit(&spa->spa_async_lock); 7769 } 7770 7771 void 7772 spa_async_request(spa_t *spa, int task) 7773 { 7774 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); 7775 mutex_enter(&spa->spa_async_lock); 7776 spa->spa_async_tasks |= task; 7777 mutex_exit(&spa->spa_async_lock); 7778 } 7779 7780 int 7781 spa_async_tasks(spa_t *spa) 7782 { 7783 return (spa->spa_async_tasks); 7784 } 7785 7786 /* 7787 * ========================================================================== 7788 * SPA syncing routines 7789 * ========================================================================== 7790 */ 7791 7792 static int 7793 bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 7794 { 7795 bpobj_t *bpo = arg; 7796 bpobj_enqueue(bpo, bp, tx); 7797 return (0); 7798 } 7799 7800 static int 7801 spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 7802 { 7803 zio_t *zio = arg; 7804 7805 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, 7806 zio->io_flags)); 7807 return (0); 7808 } 7809 7810 /* 7811 * Note: this simple function is not inlined to make it easier to dtrace the 7812 * amount of time spent syncing frees. 7813 */ 7814 static void 7815 spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx) 7816 { 7817 zio_t *zio = zio_root(spa, NULL, NULL, 0); 7818 bplist_iterate(bpl, spa_free_sync_cb, zio, tx); 7819 VERIFY(zio_wait(zio) == 0); 7820 } 7821 7822 /* 7823 * Note: this simple function is not inlined to make it easier to dtrace the 7824 * amount of time spent syncing deferred frees. 7825 */ 7826 static void 7827 spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx) 7828 { 7829 if (spa_sync_pass(spa) != 1) 7830 return; 7831 7832 /* 7833 * Note: 7834 * If the log space map feature is active, we stop deferring 7835 * frees to the next TXG and therefore running this function 7836 * would be considered a no-op as spa_deferred_bpobj should 7837 * not have any entries. 7838 * 7839 * That said we run this function anyway (instead of returning 7840 * immediately) for the edge-case scenario where we just 7841 * activated the log space map feature in this TXG but we have 7842 * deferred frees from the previous TXG. 7843 */ 7844 zio_t *zio = zio_root(spa, NULL, NULL, 0); 7845 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj, 7846 spa_free_sync_cb, zio, tx), ==, 0); 7847 VERIFY0(zio_wait(zio)); 7848 } 7849 7850 7851 static void 7852 spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) 7853 { 7854 char *packed = NULL; 7855 size_t bufsize; 7856 size_t nvsize = 0; 7857 dmu_buf_t *db; 7858 7859 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); 7860 7861 /* 7862 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration 7863 * information. This avoids the dmu_buf_will_dirty() path and 7864 * saves us a pre-read to get data we don't actually care about. 7865 */ 7866 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); 7867 packed = kmem_alloc(bufsize, KM_SLEEP); 7868 7869 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, 7870 KM_SLEEP) == 0); 7871 bzero(packed + nvsize, bufsize - nvsize); 7872 7873 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); 7874 7875 kmem_free(packed, bufsize); 7876 7877 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 7878 dmu_buf_will_dirty(db, tx); 7879 *(uint64_t *)db->db_data = nvsize; 7880 dmu_buf_rele(db, FTAG); 7881 } 7882 7883 static void 7884 spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, 7885 const char *config, const char *entry) 7886 { 7887 nvlist_t *nvroot; 7888 nvlist_t **list; 7889 int i; 7890 7891 if (!sav->sav_sync) 7892 return; 7893 7894 /* 7895 * Update the MOS nvlist describing the list of available devices. 7896 * spa_validate_aux() will have already made sure this nvlist is 7897 * valid and the vdevs are labeled appropriately. 7898 */ 7899 if (sav->sav_object == 0) { 7900 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, 7901 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, 7902 sizeof (uint64_t), tx); 7903 VERIFY(zap_update(spa->spa_meta_objset, 7904 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, 7905 &sav->sav_object, tx) == 0); 7906 } 7907 7908 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 7909 if (sav->sav_count == 0) { 7910 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); 7911 } else { 7912 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 7913 for (i = 0; i < sav->sav_count; i++) 7914 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], 7915 B_FALSE, VDEV_CONFIG_L2CACHE); 7916 VERIFY(nvlist_add_nvlist_array(nvroot, config, list, 7917 sav->sav_count) == 0); 7918 for (i = 0; i < sav->sav_count; i++) 7919 nvlist_free(list[i]); 7920 kmem_free(list, sav->sav_count * sizeof (void *)); 7921 } 7922 7923 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); 7924 nvlist_free(nvroot); 7925 7926 sav->sav_sync = B_FALSE; 7927 } 7928 7929 /* 7930 * Rebuild spa's all-vdev ZAP from the vdev ZAPs indicated in each vdev_t. 7931 * The all-vdev ZAP must be empty. 7932 */ 7933 static void 7934 spa_avz_build(vdev_t *vd, uint64_t avz, dmu_tx_t *tx) 7935 { 7936 spa_t *spa = vd->vdev_spa; 7937 if (vd->vdev_top_zap != 0) { 7938 VERIFY0(zap_add_int(spa->spa_meta_objset, avz, 7939 vd->vdev_top_zap, tx)); 7940 } 7941 if (vd->vdev_leaf_zap != 0) { 7942 VERIFY0(zap_add_int(spa->spa_meta_objset, avz, 7943 vd->vdev_leaf_zap, tx)); 7944 } 7945 for (uint64_t i = 0; i < vd->vdev_children; i++) { 7946 spa_avz_build(vd->vdev_child[i], avz, tx); 7947 } 7948 } 7949 7950 static void 7951 spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) 7952 { 7953 nvlist_t *config; 7954 7955 /* 7956 * If the pool is being imported from a pre-per-vdev-ZAP version of ZFS, 7957 * its config may not be dirty but we still need to build per-vdev ZAPs. 7958 * Similarly, if the pool is being assembled (e.g. after a split), we 7959 * need to rebuild the AVZ although the config may not be dirty. 7960 */ 7961 if (list_is_empty(&spa->spa_config_dirty_list) && 7962 spa->spa_avz_action == AVZ_ACTION_NONE) 7963 return; 7964 7965 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 7966 7967 ASSERT(spa->spa_avz_action == AVZ_ACTION_NONE || 7968 spa->spa_avz_action == AVZ_ACTION_INITIALIZE || 7969 spa->spa_all_vdev_zaps != 0); 7970 7971 if (spa->spa_avz_action == AVZ_ACTION_REBUILD) { 7972 /* Make and build the new AVZ */ 7973 uint64_t new_avz = zap_create(spa->spa_meta_objset, 7974 DMU_OTN_ZAP_METADATA, DMU_OT_NONE, 0, tx); 7975 spa_avz_build(spa->spa_root_vdev, new_avz, tx); 7976 7977 /* Diff old AVZ with new one */ 7978 zap_cursor_t zc; 7979 zap_attribute_t za; 7980 7981 for (zap_cursor_init(&zc, spa->spa_meta_objset, 7982 spa->spa_all_vdev_zaps); 7983 zap_cursor_retrieve(&zc, &za) == 0; 7984 zap_cursor_advance(&zc)) { 7985 uint64_t vdzap = za.za_first_integer; 7986 if (zap_lookup_int(spa->spa_meta_objset, new_avz, 7987 vdzap) == ENOENT) { 7988 /* 7989 * ZAP is listed in old AVZ but not in new one; 7990 * destroy it 7991 */ 7992 VERIFY0(zap_destroy(spa->spa_meta_objset, vdzap, 7993 tx)); 7994 } 7995 } 7996 7997 zap_cursor_fini(&zc); 7998 7999 /* Destroy the old AVZ */ 8000 VERIFY0(zap_destroy(spa->spa_meta_objset, 8001 spa->spa_all_vdev_zaps, tx)); 8002 8003 /* Replace the old AVZ in the dir obj with the new one */ 8004 VERIFY0(zap_update(spa->spa_meta_objset, 8005 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_VDEV_ZAP_MAP, 8006 sizeof (new_avz), 1, &new_avz, tx)); 8007 8008 spa->spa_all_vdev_zaps = new_avz; 8009 } else if (spa->spa_avz_action == AVZ_ACTION_DESTROY) { 8010 zap_cursor_t zc; 8011 zap_attribute_t za; 8012 8013 /* Walk through the AVZ and destroy all listed ZAPs */ 8014 for (zap_cursor_init(&zc, spa->spa_meta_objset, 8015 spa->spa_all_vdev_zaps); 8016 zap_cursor_retrieve(&zc, &za) == 0; 8017 zap_cursor_advance(&zc)) { 8018 uint64_t zap = za.za_first_integer; 8019 VERIFY0(zap_destroy(spa->spa_meta_objset, zap, tx)); 8020 } 8021 8022 zap_cursor_fini(&zc); 8023 8024 /* Destroy and unlink the AVZ itself */ 8025 VERIFY0(zap_destroy(spa->spa_meta_objset, 8026 spa->spa_all_vdev_zaps, tx)); 8027 VERIFY0(zap_remove(spa->spa_meta_objset, 8028 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_VDEV_ZAP_MAP, tx)); 8029 spa->spa_all_vdev_zaps = 0; 8030 } 8031 8032 if (spa->spa_all_vdev_zaps == 0) { 8033 spa->spa_all_vdev_zaps = zap_create_link(spa->spa_meta_objset, 8034 DMU_OTN_ZAP_METADATA, DMU_POOL_DIRECTORY_OBJECT, 8035 DMU_POOL_VDEV_ZAP_MAP, tx); 8036 } 8037 spa->spa_avz_action = AVZ_ACTION_NONE; 8038 8039 /* Create ZAPs for vdevs that don't have them. */ 8040 vdev_construct_zaps(spa->spa_root_vdev, tx); 8041 8042 config = spa_config_generate(spa, spa->spa_root_vdev, 8043 dmu_tx_get_txg(tx), B_FALSE); 8044 8045 /* 8046 * If we're upgrading the spa version then make sure that 8047 * the config object gets updated with the correct version. 8048 */ 8049 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version) 8050 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 8051 spa->spa_uberblock.ub_version); 8052 8053 spa_config_exit(spa, SCL_STATE, FTAG); 8054 8055 nvlist_free(spa->spa_config_syncing); 8056 spa->spa_config_syncing = config; 8057 8058 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); 8059 } 8060 8061 static void 8062 spa_sync_version(void *arg, dmu_tx_t *tx) 8063 { 8064 uint64_t *versionp = arg; 8065 uint64_t version = *versionp; 8066 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 8067 8068 /* 8069 * Setting the version is special cased when first creating the pool. 8070 */ 8071 ASSERT(tx->tx_txg != TXG_INITIAL); 8072 8073 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 8074 ASSERT(version >= spa_version(spa)); 8075 8076 spa->spa_uberblock.ub_version = version; 8077 vdev_config_dirty(spa->spa_root_vdev); 8078 spa_history_log_internal(spa, "set", tx, "version=%lld", version); 8079 } 8080 8081 /* 8082 * Set zpool properties. 8083 */ 8084 static void 8085 spa_sync_props(void *arg, dmu_tx_t *tx) 8086 { 8087 nvlist_t *nvp = arg; 8088 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 8089 objset_t *mos = spa->spa_meta_objset; 8090 nvpair_t *elem = NULL; 8091 8092 mutex_enter(&spa->spa_props_lock); 8093 8094 while ((elem = nvlist_next_nvpair(nvp, elem))) { 8095 uint64_t intval; 8096 char *strval, *fname; 8097 zpool_prop_t prop; 8098 const char *propname; 8099 zprop_type_t proptype; 8100 spa_feature_t fid; 8101 8102 switch (prop = zpool_name_to_prop(nvpair_name(elem))) { 8103 case ZPOOL_PROP_INVAL: 8104 /* 8105 * We checked this earlier in spa_prop_validate(). 8106 */ 8107 ASSERT(zpool_prop_feature(nvpair_name(elem))); 8108 8109 fname = strchr(nvpair_name(elem), '@') + 1; 8110 VERIFY0(zfeature_lookup_name(fname, &fid)); 8111 8112 spa_feature_enable(spa, fid, tx); 8113 spa_history_log_internal(spa, "set", tx, 8114 "%s=enabled", nvpair_name(elem)); 8115 break; 8116 8117 case ZPOOL_PROP_VERSION: 8118 intval = fnvpair_value_uint64(elem); 8119 /* 8120 * The version is synced seperatly before other 8121 * properties and should be correct by now. 8122 */ 8123 ASSERT3U(spa_version(spa), >=, intval); 8124 break; 8125 8126 case ZPOOL_PROP_ALTROOT: 8127 /* 8128 * 'altroot' is a non-persistent property. It should 8129 * have been set temporarily at creation or import time. 8130 */ 8131 ASSERT(spa->spa_root != NULL); 8132 break; 8133 8134 case ZPOOL_PROP_READONLY: 8135 case ZPOOL_PROP_CACHEFILE: 8136 /* 8137 * 'readonly' and 'cachefile' are also non-persisitent 8138 * properties. 8139 */ 8140 break; 8141 case ZPOOL_PROP_COMMENT: 8142 strval = fnvpair_value_string(elem); 8143 if (spa->spa_comment != NULL) 8144 spa_strfree(spa->spa_comment); 8145 spa->spa_comment = spa_strdup(strval); 8146 /* 8147 * We need to dirty the configuration on all the vdevs 8148 * so that their labels get updated. It's unnecessary 8149 * to do this for pool creation since the vdev's 8150 * configuratoin has already been dirtied. 8151 */ 8152 if (tx->tx_txg != TXG_INITIAL) 8153 vdev_config_dirty(spa->spa_root_vdev); 8154 spa_history_log_internal(spa, "set", tx, 8155 "%s=%s", nvpair_name(elem), strval); 8156 break; 8157 default: 8158 /* 8159 * Set pool property values in the poolprops mos object. 8160 */ 8161 if (spa->spa_pool_props_object == 0) { 8162 spa->spa_pool_props_object = 8163 zap_create_link(mos, DMU_OT_POOL_PROPS, 8164 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, 8165 tx); 8166 } 8167 8168 /* normalize the property name */ 8169 propname = zpool_prop_to_name(prop); 8170 proptype = zpool_prop_get_type(prop); 8171 8172 if (nvpair_type(elem) == DATA_TYPE_STRING) { 8173 ASSERT(proptype == PROP_TYPE_STRING); 8174 strval = fnvpair_value_string(elem); 8175 VERIFY0(zap_update(mos, 8176 spa->spa_pool_props_object, propname, 8177 1, strlen(strval) + 1, strval, tx)); 8178 spa_history_log_internal(spa, "set", tx, 8179 "%s=%s", nvpair_name(elem), strval); 8180 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 8181 intval = fnvpair_value_uint64(elem); 8182 8183 if (proptype == PROP_TYPE_INDEX) { 8184 const char *unused; 8185 VERIFY0(zpool_prop_index_to_string( 8186 prop, intval, &unused)); 8187 } 8188 VERIFY0(zap_update(mos, 8189 spa->spa_pool_props_object, propname, 8190 8, 1, &intval, tx)); 8191 spa_history_log_internal(spa, "set", tx, 8192 "%s=%lld", nvpair_name(elem), intval); 8193 } else { 8194 ASSERT(0); /* not allowed */ 8195 } 8196 8197 switch (prop) { 8198 case ZPOOL_PROP_DELEGATION: 8199 spa->spa_delegation = intval; 8200 break; 8201 case ZPOOL_PROP_BOOTFS: 8202 spa->spa_bootfs = intval; 8203 break; 8204 case ZPOOL_PROP_FAILUREMODE: 8205 spa->spa_failmode = intval; 8206 break; 8207 case ZPOOL_PROP_AUTOTRIM: 8208 spa->spa_autotrim = intval; 8209 spa_async_request(spa, 8210 SPA_ASYNC_AUTOTRIM_RESTART); 8211 break; 8212 case ZPOOL_PROP_AUTOEXPAND: 8213 spa->spa_autoexpand = intval; 8214 if (tx->tx_txg != TXG_INITIAL) 8215 spa_async_request(spa, 8216 SPA_ASYNC_AUTOEXPAND); 8217 break; 8218 case ZPOOL_PROP_MULTIHOST: 8219 spa->spa_multihost = intval; 8220 break; 8221 case ZPOOL_PROP_DEDUPDITTO: 8222 spa->spa_dedup_ditto = intval; 8223 break; 8224 default: 8225 break; 8226 } 8227 } 8228 8229 } 8230 8231 mutex_exit(&spa->spa_props_lock); 8232 } 8233 8234 /* 8235 * Perform one-time upgrade on-disk changes. spa_version() does not 8236 * reflect the new version this txg, so there must be no changes this 8237 * txg to anything that the upgrade code depends on after it executes. 8238 * Therefore this must be called after dsl_pool_sync() does the sync 8239 * tasks. 8240 */ 8241 static void 8242 spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) 8243 { 8244 if (spa_sync_pass(spa) != 1) 8245 return; 8246 8247 dsl_pool_t *dp = spa->spa_dsl_pool; 8248 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG); 8249 8250 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && 8251 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { 8252 dsl_pool_create_origin(dp, tx); 8253 8254 /* Keeping the origin open increases spa_minref */ 8255 spa->spa_minref += 3; 8256 } 8257 8258 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && 8259 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { 8260 dsl_pool_upgrade_clones(dp, tx); 8261 } 8262 8263 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && 8264 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { 8265 dsl_pool_upgrade_dir_clones(dp, tx); 8266 8267 /* Keeping the freedir open increases spa_minref */ 8268 spa->spa_minref += 3; 8269 } 8270 8271 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && 8272 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 8273 spa_feature_create_zap_objects(spa, tx); 8274 } 8275 8276 /* 8277 * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable 8278 * when possibility to use lz4 compression for metadata was added 8279 * Old pools that have this feature enabled must be upgraded to have 8280 * this feature active 8281 */ 8282 if (spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 8283 boolean_t lz4_en = spa_feature_is_enabled(spa, 8284 SPA_FEATURE_LZ4_COMPRESS); 8285 boolean_t lz4_ac = spa_feature_is_active(spa, 8286 SPA_FEATURE_LZ4_COMPRESS); 8287 8288 if (lz4_en && !lz4_ac) 8289 spa_feature_incr(spa, SPA_FEATURE_LZ4_COMPRESS, tx); 8290 } 8291 8292 /* 8293 * If we haven't written the salt, do so now. Note that the 8294 * feature may not be activated yet, but that's fine since 8295 * the presence of this ZAP entry is backwards compatible. 8296 */ 8297 if (zap_contains(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 8298 DMU_POOL_CHECKSUM_SALT) == ENOENT) { 8299 VERIFY0(zap_add(spa->spa_meta_objset, 8300 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CHECKSUM_SALT, 1, 8301 sizeof (spa->spa_cksum_salt.zcs_bytes), 8302 spa->spa_cksum_salt.zcs_bytes, tx)); 8303 } 8304 8305 rrw_exit(&dp->dp_config_rwlock, FTAG); 8306 } 8307 8308 static void 8309 vdev_indirect_state_sync_verify(vdev_t *vd) 8310 { 8311 vdev_indirect_mapping_t *vim = vd->vdev_indirect_mapping; 8312 vdev_indirect_births_t *vib = vd->vdev_indirect_births; 8313 8314 if (vd->vdev_ops == &vdev_indirect_ops) { 8315 ASSERT(vim != NULL); 8316 ASSERT(vib != NULL); 8317 } 8318 8319 if (vdev_obsolete_sm_object(vd) != 0) { 8320 ASSERT(vd->vdev_obsolete_sm != NULL); 8321 ASSERT(vd->vdev_removing || 8322 vd->vdev_ops == &vdev_indirect_ops); 8323 ASSERT(vdev_indirect_mapping_num_entries(vim) > 0); 8324 ASSERT(vdev_indirect_mapping_bytes_mapped(vim) > 0); 8325 8326 ASSERT3U(vdev_obsolete_sm_object(vd), ==, 8327 space_map_object(vd->vdev_obsolete_sm)); 8328 ASSERT3U(vdev_indirect_mapping_bytes_mapped(vim), >=, 8329 space_map_allocated(vd->vdev_obsolete_sm)); 8330 } 8331 ASSERT(vd->vdev_obsolete_segments != NULL); 8332 8333 /* 8334 * Since frees / remaps to an indirect vdev can only 8335 * happen in syncing context, the obsolete segments 8336 * tree must be empty when we start syncing. 8337 */ 8338 ASSERT0(range_tree_space(vd->vdev_obsolete_segments)); 8339 } 8340 8341 /* 8342 * Set the top-level vdev's max queue depth. Evaluate each top-level's 8343 * async write queue depth in case it changed. The max queue depth will 8344 * not change in the middle of syncing out this txg. 8345 */ 8346 static void 8347 spa_sync_adjust_vdev_max_queue_depth(spa_t *spa) 8348 { 8349 ASSERT(spa_writeable(spa)); 8350 8351 vdev_t *rvd = spa->spa_root_vdev; 8352 uint32_t max_queue_depth = zfs_vdev_async_write_max_active * 8353 zfs_vdev_queue_depth_pct / 100; 8354 metaslab_class_t *normal = spa_normal_class(spa); 8355 metaslab_class_t *special = spa_special_class(spa); 8356 metaslab_class_t *dedup = spa_dedup_class(spa); 8357 8358 uint64_t slots_per_allocator = 0; 8359 for (int c = 0; c < rvd->vdev_children; c++) { 8360 vdev_t *tvd = rvd->vdev_child[c]; 8361 8362 metaslab_group_t *mg = tvd->vdev_mg; 8363 if (mg == NULL || !metaslab_group_initialized(mg)) 8364 continue; 8365 8366 metaslab_class_t *mc = mg->mg_class; 8367 if (mc != normal && mc != special && mc != dedup) 8368 continue; 8369 8370 /* 8371 * It is safe to do a lock-free check here because only async 8372 * allocations look at mg_max_alloc_queue_depth, and async 8373 * allocations all happen from spa_sync(). 8374 */ 8375 for (int i = 0; i < spa->spa_alloc_count; i++) 8376 ASSERT0(zfs_refcount_count( 8377 &(mg->mg_alloc_queue_depth[i]))); 8378 mg->mg_max_alloc_queue_depth = max_queue_depth; 8379 8380 for (int i = 0; i < spa->spa_alloc_count; i++) { 8381 mg->mg_cur_max_alloc_queue_depth[i] = 8382 zfs_vdev_def_queue_depth; 8383 } 8384 slots_per_allocator += zfs_vdev_def_queue_depth; 8385 } 8386 8387 for (int i = 0; i < spa->spa_alloc_count; i++) { 8388 ASSERT0(zfs_refcount_count(&normal->mc_alloc_slots[i])); 8389 ASSERT0(zfs_refcount_count(&special->mc_alloc_slots[i])); 8390 ASSERT0(zfs_refcount_count(&dedup->mc_alloc_slots[i])); 8391 normal->mc_alloc_max_slots[i] = slots_per_allocator; 8392 special->mc_alloc_max_slots[i] = slots_per_allocator; 8393 dedup->mc_alloc_max_slots[i] = slots_per_allocator; 8394 } 8395 normal->mc_alloc_throttle_enabled = zio_dva_throttle_enabled; 8396 special->mc_alloc_throttle_enabled = zio_dva_throttle_enabled; 8397 dedup->mc_alloc_throttle_enabled = zio_dva_throttle_enabled; 8398 } 8399 8400 static void 8401 spa_sync_condense_indirect(spa_t *spa, dmu_tx_t *tx) 8402 { 8403 ASSERT(spa_writeable(spa)); 8404 8405 vdev_t *rvd = spa->spa_root_vdev; 8406 for (int c = 0; c < rvd->vdev_children; c++) { 8407 vdev_t *vd = rvd->vdev_child[c]; 8408 vdev_indirect_state_sync_verify(vd); 8409 8410 if (vdev_indirect_should_condense(vd)) { 8411 spa_condense_indirect_start_sync(vd, tx); 8412 break; 8413 } 8414 } 8415 } 8416 8417 static void 8418 spa_sync_iterate_to_convergence(spa_t *spa, dmu_tx_t *tx) 8419 { 8420 objset_t *mos = spa->spa_meta_objset; 8421 dsl_pool_t *dp = spa->spa_dsl_pool; 8422 uint64_t txg = tx->tx_txg; 8423 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; 8424 8425 do { 8426 int pass = ++spa->spa_sync_pass; 8427 8428 spa_sync_config_object(spa, tx); 8429 spa_sync_aux_dev(spa, &spa->spa_spares, tx, 8430 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); 8431 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, 8432 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); 8433 spa_errlog_sync(spa, txg); 8434 dsl_pool_sync(dp, txg); 8435 8436 if (pass < zfs_sync_pass_deferred_free || 8437 spa_feature_is_active(spa, SPA_FEATURE_LOG_SPACEMAP)) { 8438 /* 8439 * If the log space map feature is active we don't 8440 * care about deferred frees and the deferred bpobj 8441 * as the log space map should effectively have the 8442 * same results (i.e. appending only to one object). 8443 */ 8444 spa_sync_frees(spa, free_bpl, tx); 8445 } else { 8446 /* 8447 * We can not defer frees in pass 1, because 8448 * we sync the deferred frees later in pass 1. 8449 */ 8450 ASSERT3U(pass, >, 1); 8451 bplist_iterate(free_bpl, bpobj_enqueue_cb, 8452 &spa->spa_deferred_bpobj, tx); 8453 } 8454 8455 ddt_sync(spa, txg); 8456 dsl_scan_sync(dp, tx); 8457 svr_sync(spa, tx); 8458 spa_sync_upgrades(spa, tx); 8459 8460 spa_flush_metaslabs(spa, tx); 8461 8462 vdev_t *vd = NULL; 8463 while ((vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) 8464 != NULL) 8465 vdev_sync(vd, txg); 8466 8467 /* 8468 * Note: We need to check if the MOS is dirty because we could 8469 * have marked the MOS dirty without updating the uberblock 8470 * (e.g. if we have sync tasks but no dirty user data). We need 8471 * to check the uberblock's rootbp because it is updated if we 8472 * have synced out dirty data (though in this case the MOS will 8473 * most likely also be dirty due to second order effects, we 8474 * don't want to rely on that here). 8475 */ 8476 if (pass == 1 && 8477 spa->spa_uberblock.ub_rootbp.blk_birth < txg && 8478 !dmu_objset_is_dirty(mos, txg)) { 8479 /* 8480 * Nothing changed on the first pass, therefore this 8481 * TXG is a no-op. Avoid syncing deferred frees, so 8482 * that we can keep this TXG as a no-op. 8483 */ 8484 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 8485 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 8486 ASSERT(txg_list_empty(&dp->dp_sync_tasks, txg)); 8487 ASSERT(txg_list_empty(&dp->dp_early_sync_tasks, txg)); 8488 break; 8489 } 8490 8491 spa_sync_deferred_frees(spa, tx); 8492 } while (dmu_objset_is_dirty(mos, txg)); 8493 } 8494 8495 /* 8496 * Rewrite the vdev configuration (which includes the uberblock) to 8497 * commit the transaction group. 8498 * 8499 * If there are no dirty vdevs, we sync the uberblock to a few random 8500 * top-level vdevs that are known to be visible in the config cache 8501 * (see spa_vdev_add() for a complete description). If there *are* dirty 8502 * vdevs, sync the uberblock to all vdevs. 8503 */ 8504 static void 8505 spa_sync_rewrite_vdev_config(spa_t *spa, dmu_tx_t *tx) 8506 { 8507 vdev_t *rvd = spa->spa_root_vdev; 8508 uint64_t txg = tx->tx_txg; 8509 8510 for (;;) { 8511 int error = 0; 8512 8513 /* 8514 * We hold SCL_STATE to prevent vdev open/close/etc. 8515 * while we're attempting to write the vdev labels. 8516 */ 8517 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 8518 8519 if (list_is_empty(&spa->spa_config_dirty_list)) { 8520 vdev_t *svd[SPA_SYNC_MIN_VDEVS] = { NULL }; 8521 int svdcount = 0; 8522 int children = rvd->vdev_children; 8523 int c0 = spa_get_random(children); 8524 8525 for (int c = 0; c < children; c++) { 8526 vdev_t *vd = 8527 rvd->vdev_child[(c0 + c) % children]; 8528 8529 /* Stop when revisiting the first vdev */ 8530 if (c > 0 && svd[0] == vd) 8531 break; 8532 8533 if (vd->vdev_ms_array == 0 || 8534 vd->vdev_islog || 8535 !vdev_is_concrete(vd)) 8536 continue; 8537 8538 svd[svdcount++] = vd; 8539 if (svdcount == SPA_SYNC_MIN_VDEVS) 8540 break; 8541 } 8542 error = vdev_config_sync(svd, svdcount, txg); 8543 } else { 8544 error = vdev_config_sync(rvd->vdev_child, 8545 rvd->vdev_children, txg); 8546 } 8547 8548 if (error == 0) 8549 spa->spa_last_synced_guid = rvd->vdev_guid; 8550 8551 spa_config_exit(spa, SCL_STATE, FTAG); 8552 8553 if (error == 0) 8554 break; 8555 zio_suspend(spa, NULL, ZIO_SUSPEND_IOERR); 8556 zio_resume_wait(spa); 8557 } 8558 } 8559 8560 /* 8561 * Sync the specified transaction group. New blocks may be dirtied as 8562 * part of the process, so we iterate until it converges. 8563 */ 8564 void 8565 spa_sync(spa_t *spa, uint64_t txg) 8566 { 8567 vdev_t *vd = NULL; 8568 8569 VERIFY(spa_writeable(spa)); 8570 8571 /* 8572 * Wait for i/os issued in open context that need to complete 8573 * before this txg syncs. 8574 */ 8575 (void) zio_wait(spa->spa_txg_zio[txg & TXG_MASK]); 8576 spa->spa_txg_zio[txg & TXG_MASK] = zio_root(spa, NULL, NULL, 8577 ZIO_FLAG_CANFAIL); 8578 8579 /* 8580 * Lock out configuration changes. 8581 */ 8582 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 8583 8584 spa->spa_syncing_txg = txg; 8585 spa->spa_sync_pass = 0; 8586 8587 for (int i = 0; i < spa->spa_alloc_count; i++) { 8588 mutex_enter(&spa->spa_alloc_locks[i]); 8589 VERIFY0(avl_numnodes(&spa->spa_alloc_trees[i])); 8590 mutex_exit(&spa->spa_alloc_locks[i]); 8591 } 8592 8593 /* 8594 * If there are any pending vdev state changes, convert them 8595 * into config changes that go out with this transaction group. 8596 */ 8597 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 8598 while (list_head(&spa->spa_state_dirty_list) != NULL) { 8599 /* 8600 * We need the write lock here because, for aux vdevs, 8601 * calling vdev_config_dirty() modifies sav_config. 8602 * This is ugly and will become unnecessary when we 8603 * eliminate the aux vdev wart by integrating all vdevs 8604 * into the root vdev tree. 8605 */ 8606 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 8607 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); 8608 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { 8609 vdev_state_clean(vd); 8610 vdev_config_dirty(vd); 8611 } 8612 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 8613 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 8614 } 8615 spa_config_exit(spa, SCL_STATE, FTAG); 8616 8617 dsl_pool_t *dp = spa->spa_dsl_pool; 8618 dmu_tx_t *tx = dmu_tx_create_assigned(dp, txg); 8619 8620 spa->spa_sync_starttime = gethrtime(); 8621 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, 8622 spa->spa_sync_starttime + spa->spa_deadman_synctime)); 8623 8624 /* 8625 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, 8626 * set spa_deflate if we have no raid-z vdevs. 8627 */ 8628 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && 8629 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { 8630 vdev_t *rvd = spa->spa_root_vdev; 8631 8632 int i; 8633 for (i = 0; i < rvd->vdev_children; i++) { 8634 vd = rvd->vdev_child[i]; 8635 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) 8636 break; 8637 } 8638 if (i == rvd->vdev_children) { 8639 spa->spa_deflate = TRUE; 8640 VERIFY0(zap_add(spa->spa_meta_objset, 8641 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 8642 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); 8643 } 8644 } 8645 8646 spa_sync_adjust_vdev_max_queue_depth(spa); 8647 8648 spa_sync_condense_indirect(spa, tx); 8649 8650 spa_sync_iterate_to_convergence(spa, tx); 8651 8652 #ifdef ZFS_DEBUG 8653 if (!list_is_empty(&spa->spa_config_dirty_list)) { 8654 /* 8655 * Make sure that the number of ZAPs for all the vdevs matches 8656 * the number of ZAPs in the per-vdev ZAP list. This only gets 8657 * called if the config is dirty; otherwise there may be 8658 * outstanding AVZ operations that weren't completed in 8659 * spa_sync_config_object. 8660 */ 8661 uint64_t all_vdev_zap_entry_count; 8662 ASSERT0(zap_count(spa->spa_meta_objset, 8663 spa->spa_all_vdev_zaps, &all_vdev_zap_entry_count)); 8664 ASSERT3U(vdev_count_verify_zaps(spa->spa_root_vdev), ==, 8665 all_vdev_zap_entry_count); 8666 } 8667 #endif 8668 8669 if (spa->spa_vdev_removal != NULL) { 8670 ASSERT0(spa->spa_vdev_removal->svr_bytes_done[txg & TXG_MASK]); 8671 } 8672 8673 spa_sync_rewrite_vdev_config(spa, tx); 8674 dmu_tx_commit(tx); 8675 8676 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 8677 8678 /* 8679 * Clear the dirty config list. 8680 */ 8681 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) 8682 vdev_config_clean(vd); 8683 8684 /* 8685 * Now that the new config has synced transactionally, 8686 * let it become visible to the config cache. 8687 */ 8688 if (spa->spa_config_syncing != NULL) { 8689 spa_config_set(spa, spa->spa_config_syncing); 8690 spa->spa_config_txg = txg; 8691 spa->spa_config_syncing = NULL; 8692 } 8693 8694 dsl_pool_sync_done(dp, txg); 8695 8696 for (int i = 0; i < spa->spa_alloc_count; i++) { 8697 mutex_enter(&spa->spa_alloc_locks[i]); 8698 VERIFY0(avl_numnodes(&spa->spa_alloc_trees[i])); 8699 mutex_exit(&spa->spa_alloc_locks[i]); 8700 } 8701 8702 /* 8703 * Update usable space statistics. 8704 */ 8705 while ((vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) 8706 != NULL) 8707 vdev_sync_done(vd, txg); 8708 8709 metaslab_class_evict_old(spa->spa_normal_class, txg); 8710 metaslab_class_evict_old(spa->spa_log_class, txg); 8711 8712 spa_sync_close_syncing_log_sm(spa); 8713 8714 spa_update_dspace(spa); 8715 8716 /* 8717 * It had better be the case that we didn't dirty anything 8718 * since vdev_config_sync(). 8719 */ 8720 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 8721 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 8722 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); 8723 8724 while (zfs_pause_spa_sync) 8725 delay(1); 8726 8727 spa->spa_sync_pass = 0; 8728 8729 /* 8730 * Update the last synced uberblock here. We want to do this at 8731 * the end of spa_sync() so that consumers of spa_last_synced_txg() 8732 * will be guaranteed that all the processing associated with 8733 * that txg has been completed. 8734 */ 8735 spa->spa_ubsync = spa->spa_uberblock; 8736 spa_config_exit(spa, SCL_CONFIG, FTAG); 8737 8738 spa_handle_ignored_writes(spa); 8739 8740 /* Mark unused spares as needing a health check. */ 8741 if (spa_spare_poll_interval_seconds != 0 && 8742 NSEC2SEC(gethrtime() - spa->spa_spares_last_polled) > 8743 spa_spare_poll_interval_seconds) { 8744 spa_spare_poll(spa); 8745 spa->spa_spares_last_polled = gethrtime(); 8746 } 8747 8748 /* 8749 * If any async tasks have been requested, kick them off. 8750 */ 8751 spa_async_dispatch(spa); 8752 } 8753 8754 /* 8755 * Sync all pools. We don't want to hold the namespace lock across these 8756 * operations, so we take a reference on the spa_t and drop the lock during the 8757 * sync. 8758 */ 8759 void 8760 spa_sync_allpools(void) 8761 { 8762 spa_t *spa = NULL; 8763 mutex_enter(&spa_namespace_lock); 8764 while ((spa = spa_next(spa)) != NULL) { 8765 if (spa_state(spa) != POOL_STATE_ACTIVE || 8766 !spa_writeable(spa) || spa_suspended(spa)) 8767 continue; 8768 spa_open_ref(spa, FTAG); 8769 mutex_exit(&spa_namespace_lock); 8770 txg_wait_synced(spa_get_dsl(spa), 0); 8771 mutex_enter(&spa_namespace_lock); 8772 spa_close(spa, FTAG); 8773 } 8774 mutex_exit(&spa_namespace_lock); 8775 } 8776 8777 /* 8778 * ========================================================================== 8779 * Miscellaneous routines 8780 * ========================================================================== 8781 */ 8782 8783 /* 8784 * Remove all pools in the system. 8785 */ 8786 void 8787 spa_evict_all(void) 8788 { 8789 spa_t *spa; 8790 8791 /* 8792 * Remove all cached state. All pools should be closed now, 8793 * so every spa in the AVL tree should be unreferenced. 8794 */ 8795 mutex_enter(&spa_namespace_lock); 8796 while ((spa = spa_next(NULL)) != NULL) { 8797 /* 8798 * Stop async tasks. The async thread may need to detach 8799 * a device that's been replaced, which requires grabbing 8800 * spa_namespace_lock, so we must drop it here. 8801 */ 8802 spa_open_ref(spa, FTAG); 8803 mutex_exit(&spa_namespace_lock); 8804 spa_async_suspend(spa); 8805 mutex_enter(&spa_namespace_lock); 8806 spa_close(spa, FTAG); 8807 8808 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 8809 spa_unload(spa); 8810 spa_deactivate(spa); 8811 } 8812 spa_remove(spa); 8813 } 8814 mutex_exit(&spa_namespace_lock); 8815 } 8816 8817 vdev_t * 8818 spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) 8819 { 8820 vdev_t *vd; 8821 int i; 8822 8823 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) 8824 return (vd); 8825 8826 if (aux) { 8827 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 8828 vd = spa->spa_l2cache.sav_vdevs[i]; 8829 if (vd->vdev_guid == guid) 8830 return (vd); 8831 } 8832 8833 for (i = 0; i < spa->spa_spares.sav_count; i++) { 8834 vd = spa->spa_spares.sav_vdevs[i]; 8835 if (vd->vdev_guid == guid) 8836 return (vd); 8837 } 8838 } 8839 8840 return (NULL); 8841 } 8842 8843 void 8844 spa_upgrade(spa_t *spa, uint64_t version) 8845 { 8846 ASSERT(spa_writeable(spa)); 8847 8848 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 8849 8850 /* 8851 * This should only be called for a non-faulted pool, and since a 8852 * future version would result in an unopenable pool, this shouldn't be 8853 * possible. 8854 */ 8855 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); 8856 ASSERT3U(version, >=, spa->spa_uberblock.ub_version); 8857 8858 spa->spa_uberblock.ub_version = version; 8859 vdev_config_dirty(spa->spa_root_vdev); 8860 8861 spa_config_exit(spa, SCL_ALL, FTAG); 8862 8863 txg_wait_synced(spa_get_dsl(spa), 0); 8864 } 8865 8866 boolean_t 8867 spa_has_spare(spa_t *spa, uint64_t guid) 8868 { 8869 int i; 8870 uint64_t spareguid; 8871 spa_aux_vdev_t *sav = &spa->spa_spares; 8872 8873 for (i = 0; i < sav->sav_count; i++) 8874 if (sav->sav_vdevs[i]->vdev_guid == guid) 8875 return (B_TRUE); 8876 8877 for (i = 0; i < sav->sav_npending; i++) { 8878 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, 8879 &spareguid) == 0 && spareguid == guid) 8880 return (B_TRUE); 8881 } 8882 8883 return (B_FALSE); 8884 } 8885 8886 /* 8887 * Check if a pool has an active shared spare device. 8888 * Note: reference count of an active spare is 2, as a spare and as a replace 8889 */ 8890 static boolean_t 8891 spa_has_active_shared_spare(spa_t *spa) 8892 { 8893 int i, refcnt; 8894 uint64_t pool; 8895 spa_aux_vdev_t *sav = &spa->spa_spares; 8896 8897 for (i = 0; i < sav->sav_count; i++) { 8898 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, 8899 &refcnt) && pool != 0ULL && pool == spa_guid(spa) && 8900 refcnt > 2) 8901 return (B_TRUE); 8902 } 8903 8904 return (B_FALSE); 8905 } 8906 8907 uint64_t 8908 spa_total_metaslabs(spa_t *spa) 8909 { 8910 vdev_t *rvd = spa->spa_root_vdev; 8911 uint64_t m = 0; 8912 8913 for (uint64_t c = 0; c < rvd->vdev_children; c++) { 8914 vdev_t *vd = rvd->vdev_child[c]; 8915 if (!vdev_is_concrete(vd)) 8916 continue; 8917 m += vd->vdev_ms_count; 8918 } 8919 return (m); 8920 } 8921 8922 sysevent_t * 8923 spa_event_create(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl, const char *name) 8924 { 8925 sysevent_t *ev = NULL; 8926 #ifdef _KERNEL 8927 sysevent_attr_list_t *attr = NULL; 8928 sysevent_value_t value; 8929 8930 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", 8931 SE_SLEEP); 8932 ASSERT(ev != NULL); 8933 8934 value.value_type = SE_DATA_TYPE_STRING; 8935 value.value.sv_string = spa_name(spa); 8936 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) 8937 goto done; 8938 8939 value.value_type = SE_DATA_TYPE_UINT64; 8940 value.value.sv_uint64 = spa_guid(spa); 8941 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) 8942 goto done; 8943 8944 if (vd) { 8945 value.value_type = SE_DATA_TYPE_UINT64; 8946 value.value.sv_uint64 = vd->vdev_guid; 8947 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, 8948 SE_SLEEP) != 0) 8949 goto done; 8950 8951 if (vd->vdev_path) { 8952 value.value_type = SE_DATA_TYPE_STRING; 8953 value.value.sv_string = vd->vdev_path; 8954 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, 8955 &value, SE_SLEEP) != 0) 8956 goto done; 8957 } 8958 } 8959 8960 if (hist_nvl != NULL) { 8961 fnvlist_merge((nvlist_t *)attr, hist_nvl); 8962 } 8963 8964 if (sysevent_attach_attributes(ev, attr) != 0) 8965 goto done; 8966 attr = NULL; 8967 8968 done: 8969 if (attr) 8970 sysevent_free_attr(attr); 8971 8972 #endif 8973 return (ev); 8974 } 8975 8976 void 8977 spa_event_post(sysevent_t *ev) 8978 { 8979 #ifdef _KERNEL 8980 sysevent_id_t eid; 8981 8982 (void) log_sysevent(ev, SE_SLEEP, &eid); 8983 sysevent_free(ev); 8984 #endif 8985 } 8986 8987 void 8988 spa_event_discard(sysevent_t *ev) 8989 { 8990 #ifdef _KERNEL 8991 sysevent_free(ev); 8992 #endif 8993 } 8994 8995 /* 8996 * Post a sysevent corresponding to the given event. The 'name' must be one of 8997 * the event definitions in sys/sysevent/eventdefs.h. The payload will be 8998 * filled in from the spa and (optionally) the vdev and history nvl. This 8999 * doesn't do anything in the userland libzpool, as we don't want consumers to 9000 * misinterpret ztest or zdb as real changes. 9001 */ 9002 void 9003 spa_event_notify(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl, const char *name) 9004 { 9005 spa_event_post(spa_event_create(spa, vd, hist_nvl, name)); 9006 } 9007