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