spa.c revision 323746
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, 2017 by Delphix. All rights reserved. 25 * Copyright (c) 2015, Nexenta Systems, Inc. All rights reserved. 26 * Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 27 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 28 * Copyright 2013 Saso Kiselkov. All rights reserved. 29 * Copyright (c) 2014 Integros [integros.com] 30 */ 31 32/* 33 * SPA: Storage Pool Allocator 34 * 35 * This file contains all the routines used when modifying on-disk SPA state. 36 * This includes opening, importing, destroying, exporting a pool, and syncing a 37 * pool. 38 */ 39 40#include <sys/zfs_context.h> 41#include <sys/fm/fs/zfs.h> 42#include <sys/spa_impl.h> 43#include <sys/zio.h> 44#include <sys/zio_checksum.h> 45#include <sys/dmu.h> 46#include <sys/dmu_tx.h> 47#include <sys/zap.h> 48#include <sys/zil.h> 49#include <sys/ddt.h> 50#include <sys/vdev_impl.h> 51#include <sys/metaslab.h> 52#include <sys/metaslab_impl.h> 53#include <sys/uberblock_impl.h> 54#include <sys/txg.h> 55#include <sys/avl.h> 56#include <sys/dmu_traverse.h> 57#include <sys/dmu_objset.h> 58#include <sys/unique.h> 59#include <sys/dsl_pool.h> 60#include <sys/dsl_dataset.h> 61#include <sys/dsl_dir.h> 62#include <sys/dsl_prop.h> 63#include <sys/dsl_synctask.h> 64#include <sys/fs/zfs.h> 65#include <sys/arc.h> 66#include <sys/callb.h> 67#include <sys/spa_boot.h> 68#include <sys/zfs_ioctl.h> 69#include <sys/dsl_scan.h> 70#include <sys/dmu_send.h> 71#include <sys/dsl_destroy.h> 72#include <sys/dsl_userhold.h> 73#include <sys/zfeature.h> 74#include <sys/zvol.h> 75#include <sys/trim_map.h> 76#include <sys/abd.h> 77 78#ifdef _KERNEL 79#include <sys/callb.h> 80#include <sys/cpupart.h> 81#include <sys/zone.h> 82#endif /* _KERNEL */ 83 84#include "zfs_prop.h" 85#include "zfs_comutil.h" 86 87/* Check hostid on import? */ 88static int check_hostid = 1; 89 90/* 91 * The interval, in seconds, at which failed configuration cache file writes 92 * should be retried. 93 */ 94static int zfs_ccw_retry_interval = 300; 95 96SYSCTL_DECL(_vfs_zfs); 97SYSCTL_INT(_vfs_zfs, OID_AUTO, check_hostid, CTLFLAG_RWTUN, &check_hostid, 0, 98 "Check hostid on import?"); 99TUNABLE_INT("vfs.zfs.ccw_retry_interval", &zfs_ccw_retry_interval); 100SYSCTL_INT(_vfs_zfs, OID_AUTO, ccw_retry_interval, CTLFLAG_RW, 101 &zfs_ccw_retry_interval, 0, 102 "Configuration cache file write, retry after failure, interval (seconds)"); 103 104typedef enum zti_modes { 105 ZTI_MODE_FIXED, /* value is # of threads (min 1) */ 106 ZTI_MODE_BATCH, /* cpu-intensive; value is ignored */ 107 ZTI_MODE_NULL, /* don't create a taskq */ 108 ZTI_NMODES 109} zti_modes_t; 110 111#define ZTI_P(n, q) { ZTI_MODE_FIXED, (n), (q) } 112#define ZTI_BATCH { ZTI_MODE_BATCH, 0, 1 } 113#define ZTI_NULL { ZTI_MODE_NULL, 0, 0 } 114 115#define ZTI_N(n) ZTI_P(n, 1) 116#define ZTI_ONE ZTI_N(1) 117 118typedef struct zio_taskq_info { 119 zti_modes_t zti_mode; 120 uint_t zti_value; 121 uint_t zti_count; 122} zio_taskq_info_t; 123 124static const char *const zio_taskq_types[ZIO_TASKQ_TYPES] = { 125 "issue", "issue_high", "intr", "intr_high" 126}; 127 128/* 129 * This table defines the taskq settings for each ZFS I/O type. When 130 * initializing a pool, we use this table to create an appropriately sized 131 * taskq. Some operations are low volume and therefore have a small, static 132 * number of threads assigned to their taskqs using the ZTI_N(#) or ZTI_ONE 133 * macros. Other operations process a large amount of data; the ZTI_BATCH 134 * macro causes us to create a taskq oriented for throughput. Some operations 135 * are so high frequency and short-lived that the taskq itself can become a a 136 * point of lock contention. The ZTI_P(#, #) macro indicates that we need an 137 * additional degree of parallelism specified by the number of threads per- 138 * taskq and the number of taskqs; when dispatching an event in this case, the 139 * particular taskq is chosen at random. 140 * 141 * The different taskq priorities are to handle the different contexts (issue 142 * and interrupt) and then to reserve threads for ZIO_PRIORITY_NOW I/Os that 143 * need to be handled with minimum delay. 144 */ 145const zio_taskq_info_t zio_taskqs[ZIO_TYPES][ZIO_TASKQ_TYPES] = { 146 /* ISSUE ISSUE_HIGH INTR INTR_HIGH */ 147 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* NULL */ 148 { ZTI_N(8), ZTI_NULL, ZTI_P(12, 8), ZTI_NULL }, /* READ */ 149 { ZTI_BATCH, ZTI_N(5), ZTI_N(8), ZTI_N(5) }, /* WRITE */ 150 { ZTI_P(12, 8), ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* FREE */ 151 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* CLAIM */ 152 { ZTI_ONE, ZTI_NULL, ZTI_ONE, ZTI_NULL }, /* IOCTL */ 153}; 154 155static sysevent_t *spa_event_create(spa_t *spa, vdev_t *vd, const char *name); 156static void spa_event_post(sysevent_t *ev); 157static void spa_sync_version(void *arg, dmu_tx_t *tx); 158static void spa_sync_props(void *arg, dmu_tx_t *tx); 159static boolean_t spa_has_active_shared_spare(spa_t *spa); 160static int spa_load_impl(spa_t *spa, uint64_t, nvlist_t *config, 161 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 162 char **ereport); 163static void spa_vdev_resilver_done(spa_t *spa); 164 165uint_t zio_taskq_batch_pct = 75; /* 1 thread per cpu in pset */ 166#ifdef PSRSET_BIND 167id_t zio_taskq_psrset_bind = PS_NONE; 168#endif 169#ifdef SYSDC 170boolean_t zio_taskq_sysdc = B_TRUE; /* use SDC scheduling class */ 171uint_t zio_taskq_basedc = 80; /* base duty cycle */ 172#endif 173 174boolean_t spa_create_process = B_TRUE; /* no process ==> no sysdc */ 175extern int zfs_sync_pass_deferred_free; 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 * ========================================================================== 185 * SPA properties routines 186 * ========================================================================== 187 */ 188 189/* 190 * Add a (source=src, propname=propval) list to an nvlist. 191 */ 192static void 193spa_prop_add_list(nvlist_t *nvl, zpool_prop_t prop, char *strval, 194 uint64_t intval, zprop_source_t src) 195{ 196 const char *propname = zpool_prop_to_name(prop); 197 nvlist_t *propval; 198 199 VERIFY(nvlist_alloc(&propval, NV_UNIQUE_NAME, KM_SLEEP) == 0); 200 VERIFY(nvlist_add_uint64(propval, ZPROP_SOURCE, src) == 0); 201 202 if (strval != NULL) 203 VERIFY(nvlist_add_string(propval, ZPROP_VALUE, strval) == 0); 204 else 205 VERIFY(nvlist_add_uint64(propval, ZPROP_VALUE, intval) == 0); 206 207 VERIFY(nvlist_add_nvlist(nvl, propname, propval) == 0); 208 nvlist_free(propval); 209} 210 211/* 212 * Get property values from the spa configuration. 213 */ 214static void 215spa_prop_get_config(spa_t *spa, nvlist_t **nvp) 216{ 217 vdev_t *rvd = spa->spa_root_vdev; 218 dsl_pool_t *pool = spa->spa_dsl_pool; 219 uint64_t size, alloc, cap, version; 220 zprop_source_t src = ZPROP_SRC_NONE; 221 spa_config_dirent_t *dp; 222 metaslab_class_t *mc = spa_normal_class(spa); 223 224 ASSERT(MUTEX_HELD(&spa->spa_props_lock)); 225 226 if (rvd != NULL) { 227 alloc = metaslab_class_get_alloc(spa_normal_class(spa)); 228 size = metaslab_class_get_space(spa_normal_class(spa)); 229 spa_prop_add_list(*nvp, ZPOOL_PROP_NAME, spa_name(spa), 0, src); 230 spa_prop_add_list(*nvp, ZPOOL_PROP_SIZE, NULL, size, src); 231 spa_prop_add_list(*nvp, ZPOOL_PROP_ALLOCATED, NULL, alloc, src); 232 spa_prop_add_list(*nvp, ZPOOL_PROP_FREE, NULL, 233 size - alloc, src); 234 235 spa_prop_add_list(*nvp, ZPOOL_PROP_FRAGMENTATION, NULL, 236 metaslab_class_fragmentation(mc), src); 237 spa_prop_add_list(*nvp, ZPOOL_PROP_EXPANDSZ, NULL, 238 metaslab_class_expandable_space(mc), src); 239 spa_prop_add_list(*nvp, ZPOOL_PROP_READONLY, NULL, 240 (spa_mode(spa) == FREAD), src); 241 242 cap = (size == 0) ? 0 : (alloc * 100 / size); 243 spa_prop_add_list(*nvp, ZPOOL_PROP_CAPACITY, NULL, cap, src); 244 245 spa_prop_add_list(*nvp, ZPOOL_PROP_DEDUPRATIO, NULL, 246 ddt_get_pool_dedup_ratio(spa), src); 247 248 spa_prop_add_list(*nvp, ZPOOL_PROP_HEALTH, NULL, 249 rvd->vdev_state, src); 250 251 version = spa_version(spa); 252 if (version == zpool_prop_default_numeric(ZPOOL_PROP_VERSION)) 253 src = ZPROP_SRC_DEFAULT; 254 else 255 src = ZPROP_SRC_LOCAL; 256 spa_prop_add_list(*nvp, ZPOOL_PROP_VERSION, NULL, version, src); 257 } 258 259 if (pool != NULL) { 260 /* 261 * The $FREE directory was introduced in SPA_VERSION_DEADLISTS, 262 * when opening pools before this version freedir will be NULL. 263 */ 264 if (pool->dp_free_dir != NULL) { 265 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, NULL, 266 dsl_dir_phys(pool->dp_free_dir)->dd_used_bytes, 267 src); 268 } else { 269 spa_prop_add_list(*nvp, ZPOOL_PROP_FREEING, 270 NULL, 0, src); 271 } 272 273 if (pool->dp_leak_dir != NULL) { 274 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, NULL, 275 dsl_dir_phys(pool->dp_leak_dir)->dd_used_bytes, 276 src); 277 } else { 278 spa_prop_add_list(*nvp, ZPOOL_PROP_LEAKED, 279 NULL, 0, src); 280 } 281 } 282 283 spa_prop_add_list(*nvp, ZPOOL_PROP_GUID, NULL, spa_guid(spa), src); 284 285 if (spa->spa_comment != NULL) { 286 spa_prop_add_list(*nvp, ZPOOL_PROP_COMMENT, spa->spa_comment, 287 0, ZPROP_SRC_LOCAL); 288 } 289 290 if (spa->spa_root != NULL) 291 spa_prop_add_list(*nvp, ZPOOL_PROP_ALTROOT, spa->spa_root, 292 0, ZPROP_SRC_LOCAL); 293 294 if (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_BLOCKS)) { 295 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL, 296 MIN(zfs_max_recordsize, SPA_MAXBLOCKSIZE), ZPROP_SRC_NONE); 297 } else { 298 spa_prop_add_list(*nvp, ZPOOL_PROP_MAXBLOCKSIZE, NULL, 299 SPA_OLD_MAXBLOCKSIZE, ZPROP_SRC_NONE); 300 } 301 302 if ((dp = list_head(&spa->spa_config_list)) != NULL) { 303 if (dp->scd_path == NULL) { 304 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 305 "none", 0, ZPROP_SRC_LOCAL); 306 } else if (strcmp(dp->scd_path, spa_config_path) != 0) { 307 spa_prop_add_list(*nvp, ZPOOL_PROP_CACHEFILE, 308 dp->scd_path, 0, ZPROP_SRC_LOCAL); 309 } 310 } 311} 312 313/* 314 * Get zpool property values. 315 */ 316int 317spa_prop_get(spa_t *spa, nvlist_t **nvp) 318{ 319 objset_t *mos = spa->spa_meta_objset; 320 zap_cursor_t zc; 321 zap_attribute_t za; 322 int err; 323 324 VERIFY(nvlist_alloc(nvp, NV_UNIQUE_NAME, KM_SLEEP) == 0); 325 326 mutex_enter(&spa->spa_props_lock); 327 328 /* 329 * Get properties from the spa config. 330 */ 331 spa_prop_get_config(spa, nvp); 332 333 /* If no pool property object, no more prop to get. */ 334 if (mos == NULL || spa->spa_pool_props_object == 0) { 335 mutex_exit(&spa->spa_props_lock); 336 return (0); 337 } 338 339 /* 340 * Get properties from the MOS pool property object. 341 */ 342 for (zap_cursor_init(&zc, mos, spa->spa_pool_props_object); 343 (err = zap_cursor_retrieve(&zc, &za)) == 0; 344 zap_cursor_advance(&zc)) { 345 uint64_t intval = 0; 346 char *strval = NULL; 347 zprop_source_t src = ZPROP_SRC_DEFAULT; 348 zpool_prop_t prop; 349 350 if ((prop = zpool_name_to_prop(za.za_name)) == ZPROP_INVAL) 351 continue; 352 353 switch (za.za_integer_length) { 354 case 8: 355 /* integer property */ 356 if (za.za_first_integer != 357 zpool_prop_default_numeric(prop)) 358 src = ZPROP_SRC_LOCAL; 359 360 if (prop == ZPOOL_PROP_BOOTFS) { 361 dsl_pool_t *dp; 362 dsl_dataset_t *ds = NULL; 363 364 dp = spa_get_dsl(spa); 365 dsl_pool_config_enter(dp, FTAG); 366 if (err = dsl_dataset_hold_obj(dp, 367 za.za_first_integer, FTAG, &ds)) { 368 dsl_pool_config_exit(dp, FTAG); 369 break; 370 } 371 372 strval = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, 373 KM_SLEEP); 374 dsl_dataset_name(ds, strval); 375 dsl_dataset_rele(ds, FTAG); 376 dsl_pool_config_exit(dp, FTAG); 377 } else { 378 strval = NULL; 379 intval = za.za_first_integer; 380 } 381 382 spa_prop_add_list(*nvp, prop, strval, intval, src); 383 384 if (strval != NULL) 385 kmem_free(strval, ZFS_MAX_DATASET_NAME_LEN); 386 387 break; 388 389 case 1: 390 /* string property */ 391 strval = kmem_alloc(za.za_num_integers, KM_SLEEP); 392 err = zap_lookup(mos, spa->spa_pool_props_object, 393 za.za_name, 1, za.za_num_integers, strval); 394 if (err) { 395 kmem_free(strval, za.za_num_integers); 396 break; 397 } 398 spa_prop_add_list(*nvp, prop, strval, 0, src); 399 kmem_free(strval, za.za_num_integers); 400 break; 401 402 default: 403 break; 404 } 405 } 406 zap_cursor_fini(&zc); 407 mutex_exit(&spa->spa_props_lock); 408out: 409 if (err && err != ENOENT) { 410 nvlist_free(*nvp); 411 *nvp = NULL; 412 return (err); 413 } 414 415 return (0); 416} 417 418/* 419 * Validate the given pool properties nvlist and modify the list 420 * for the property values to be set. 421 */ 422static int 423spa_prop_validate(spa_t *spa, nvlist_t *props) 424{ 425 nvpair_t *elem; 426 int error = 0, reset_bootfs = 0; 427 uint64_t objnum = 0; 428 boolean_t has_feature = B_FALSE; 429 430 elem = NULL; 431 while ((elem = nvlist_next_nvpair(props, elem)) != NULL) { 432 uint64_t intval; 433 char *strval, *slash, *check, *fname; 434 const char *propname = nvpair_name(elem); 435 zpool_prop_t prop = zpool_name_to_prop(propname); 436 437 switch (prop) { 438 case ZPROP_INVAL: 439 if (!zpool_prop_feature(propname)) { 440 error = SET_ERROR(EINVAL); 441 break; 442 } 443 444 /* 445 * Sanitize the input. 446 */ 447 if (nvpair_type(elem) != DATA_TYPE_UINT64) { 448 error = SET_ERROR(EINVAL); 449 break; 450 } 451 452 if (nvpair_value_uint64(elem, &intval) != 0) { 453 error = SET_ERROR(EINVAL); 454 break; 455 } 456 457 if (intval != 0) { 458 error = SET_ERROR(EINVAL); 459 break; 460 } 461 462 fname = strchr(propname, '@') + 1; 463 if (zfeature_lookup_name(fname, NULL) != 0) { 464 error = SET_ERROR(EINVAL); 465 break; 466 } 467 468 has_feature = B_TRUE; 469 break; 470 471 case ZPOOL_PROP_VERSION: 472 error = nvpair_value_uint64(elem, &intval); 473 if (!error && 474 (intval < spa_version(spa) || 475 intval > SPA_VERSION_BEFORE_FEATURES || 476 has_feature)) 477 error = SET_ERROR(EINVAL); 478 break; 479 480 case ZPOOL_PROP_DELEGATION: 481 case ZPOOL_PROP_AUTOREPLACE: 482 case ZPOOL_PROP_LISTSNAPS: 483 case ZPOOL_PROP_AUTOEXPAND: 484 error = nvpair_value_uint64(elem, &intval); 485 if (!error && intval > 1) 486 error = SET_ERROR(EINVAL); 487 break; 488 489 case ZPOOL_PROP_BOOTFS: 490 /* 491 * If the pool version is less than SPA_VERSION_BOOTFS, 492 * or the pool is still being created (version == 0), 493 * the bootfs property cannot be set. 494 */ 495 if (spa_version(spa) < SPA_VERSION_BOOTFS) { 496 error = SET_ERROR(ENOTSUP); 497 break; 498 } 499 500 /* 501 * Make sure the vdev config is bootable 502 */ 503 if (!vdev_is_bootable(spa->spa_root_vdev)) { 504 error = SET_ERROR(ENOTSUP); 505 break; 506 } 507 508 reset_bootfs = 1; 509 510 error = nvpair_value_string(elem, &strval); 511 512 if (!error) { 513 objset_t *os; 514 uint64_t propval; 515 516 if (strval == NULL || strval[0] == '\0') { 517 objnum = zpool_prop_default_numeric( 518 ZPOOL_PROP_BOOTFS); 519 break; 520 } 521 522 if (error = dmu_objset_hold(strval, FTAG, &os)) 523 break; 524 525 /* 526 * Must be ZPL, and its property settings 527 * must be supported by GRUB (compression 528 * is not gzip, and large blocks are not used). 529 */ 530 531 if (dmu_objset_type(os) != DMU_OST_ZFS) { 532 error = SET_ERROR(ENOTSUP); 533 } else if ((error = 534 dsl_prop_get_int_ds(dmu_objset_ds(os), 535 zfs_prop_to_name(ZFS_PROP_COMPRESSION), 536 &propval)) == 0 && 537 !BOOTFS_COMPRESS_VALID(propval)) { 538 error = SET_ERROR(ENOTSUP); 539 } else if ((error = 540 dsl_prop_get_int_ds(dmu_objset_ds(os), 541 zfs_prop_to_name(ZFS_PROP_RECORDSIZE), 542 &propval)) == 0 && 543 propval > SPA_OLD_MAXBLOCKSIZE) { 544 error = SET_ERROR(ENOTSUP); 545 } else { 546 objnum = dmu_objset_id(os); 547 } 548 dmu_objset_rele(os, FTAG); 549 } 550 break; 551 552 case ZPOOL_PROP_FAILUREMODE: 553 error = nvpair_value_uint64(elem, &intval); 554 if (!error && (intval < ZIO_FAILURE_MODE_WAIT || 555 intval > ZIO_FAILURE_MODE_PANIC)) 556 error = SET_ERROR(EINVAL); 557 558 /* 559 * This is a special case which only occurs when 560 * the pool has completely failed. This allows 561 * the user to change the in-core failmode property 562 * without syncing it out to disk (I/Os might 563 * currently be blocked). We do this by returning 564 * EIO to the caller (spa_prop_set) to trick it 565 * into thinking we encountered a property validation 566 * error. 567 */ 568 if (!error && spa_suspended(spa)) { 569 spa->spa_failmode = intval; 570 error = SET_ERROR(EIO); 571 } 572 break; 573 574 case ZPOOL_PROP_CACHEFILE: 575 if ((error = nvpair_value_string(elem, &strval)) != 0) 576 break; 577 578 if (strval[0] == '\0') 579 break; 580 581 if (strcmp(strval, "none") == 0) 582 break; 583 584 if (strval[0] != '/') { 585 error = SET_ERROR(EINVAL); 586 break; 587 } 588 589 slash = strrchr(strval, '/'); 590 ASSERT(slash != NULL); 591 592 if (slash[1] == '\0' || strcmp(slash, "/.") == 0 || 593 strcmp(slash, "/..") == 0) 594 error = SET_ERROR(EINVAL); 595 break; 596 597 case ZPOOL_PROP_COMMENT: 598 if ((error = nvpair_value_string(elem, &strval)) != 0) 599 break; 600 for (check = strval; *check != '\0'; check++) { 601 /* 602 * The kernel doesn't have an easy isprint() 603 * check. For this kernel check, we merely 604 * check ASCII apart from DEL. Fix this if 605 * there is an easy-to-use kernel isprint(). 606 */ 607 if (*check >= 0x7f) { 608 error = SET_ERROR(EINVAL); 609 break; 610 } 611 } 612 if (strlen(strval) > ZPROP_MAX_COMMENT) 613 error = E2BIG; 614 break; 615 616 case ZPOOL_PROP_DEDUPDITTO: 617 if (spa_version(spa) < SPA_VERSION_DEDUP) 618 error = SET_ERROR(ENOTSUP); 619 else 620 error = nvpair_value_uint64(elem, &intval); 621 if (error == 0 && 622 intval != 0 && intval < ZIO_DEDUPDITTO_MIN) 623 error = SET_ERROR(EINVAL); 624 break; 625 } 626 627 if (error) 628 break; 629 } 630 631 if (!error && reset_bootfs) { 632 error = nvlist_remove(props, 633 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), DATA_TYPE_STRING); 634 635 if (!error) { 636 error = nvlist_add_uint64(props, 637 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), objnum); 638 } 639 } 640 641 return (error); 642} 643 644void 645spa_configfile_set(spa_t *spa, nvlist_t *nvp, boolean_t need_sync) 646{ 647 char *cachefile; 648 spa_config_dirent_t *dp; 649 650 if (nvlist_lookup_string(nvp, zpool_prop_to_name(ZPOOL_PROP_CACHEFILE), 651 &cachefile) != 0) 652 return; 653 654 dp = kmem_alloc(sizeof (spa_config_dirent_t), 655 KM_SLEEP); 656 657 if (cachefile[0] == '\0') 658 dp->scd_path = spa_strdup(spa_config_path); 659 else if (strcmp(cachefile, "none") == 0) 660 dp->scd_path = NULL; 661 else 662 dp->scd_path = spa_strdup(cachefile); 663 664 list_insert_head(&spa->spa_config_list, dp); 665 if (need_sync) 666 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 667} 668 669int 670spa_prop_set(spa_t *spa, nvlist_t *nvp) 671{ 672 int error; 673 nvpair_t *elem = NULL; 674 boolean_t need_sync = B_FALSE; 675 676 if ((error = spa_prop_validate(spa, nvp)) != 0) 677 return (error); 678 679 while ((elem = nvlist_next_nvpair(nvp, elem)) != NULL) { 680 zpool_prop_t prop = zpool_name_to_prop(nvpair_name(elem)); 681 682 if (prop == ZPOOL_PROP_CACHEFILE || 683 prop == ZPOOL_PROP_ALTROOT || 684 prop == ZPOOL_PROP_READONLY) 685 continue; 686 687 if (prop == ZPOOL_PROP_VERSION || prop == ZPROP_INVAL) { 688 uint64_t ver; 689 690 if (prop == ZPOOL_PROP_VERSION) { 691 VERIFY(nvpair_value_uint64(elem, &ver) == 0); 692 } else { 693 ASSERT(zpool_prop_feature(nvpair_name(elem))); 694 ver = SPA_VERSION_FEATURES; 695 need_sync = B_TRUE; 696 } 697 698 /* Save time if the version is already set. */ 699 if (ver == spa_version(spa)) 700 continue; 701 702 /* 703 * In addition to the pool directory object, we might 704 * create the pool properties object, the features for 705 * read object, the features for write object, or the 706 * feature descriptions object. 707 */ 708 error = dsl_sync_task(spa->spa_name, NULL, 709 spa_sync_version, &ver, 710 6, ZFS_SPACE_CHECK_RESERVED); 711 if (error) 712 return (error); 713 continue; 714 } 715 716 need_sync = B_TRUE; 717 break; 718 } 719 720 if (need_sync) { 721 return (dsl_sync_task(spa->spa_name, NULL, spa_sync_props, 722 nvp, 6, ZFS_SPACE_CHECK_RESERVED)); 723 } 724 725 return (0); 726} 727 728/* 729 * If the bootfs property value is dsobj, clear it. 730 */ 731void 732spa_prop_clear_bootfs(spa_t *spa, uint64_t dsobj, dmu_tx_t *tx) 733{ 734 if (spa->spa_bootfs == dsobj && spa->spa_pool_props_object != 0) { 735 VERIFY(zap_remove(spa->spa_meta_objset, 736 spa->spa_pool_props_object, 737 zpool_prop_to_name(ZPOOL_PROP_BOOTFS), tx) == 0); 738 spa->spa_bootfs = 0; 739 } 740} 741 742/*ARGSUSED*/ 743static int 744spa_change_guid_check(void *arg, dmu_tx_t *tx) 745{ 746 uint64_t *newguid = arg; 747 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 748 vdev_t *rvd = spa->spa_root_vdev; 749 uint64_t vdev_state; 750 751 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 752 vdev_state = rvd->vdev_state; 753 spa_config_exit(spa, SCL_STATE, FTAG); 754 755 if (vdev_state != VDEV_STATE_HEALTHY) 756 return (SET_ERROR(ENXIO)); 757 758 ASSERT3U(spa_guid(spa), !=, *newguid); 759 760 return (0); 761} 762 763static void 764spa_change_guid_sync(void *arg, dmu_tx_t *tx) 765{ 766 uint64_t *newguid = arg; 767 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 768 uint64_t oldguid; 769 vdev_t *rvd = spa->spa_root_vdev; 770 771 oldguid = spa_guid(spa); 772 773 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 774 rvd->vdev_guid = *newguid; 775 rvd->vdev_guid_sum += (*newguid - oldguid); 776 vdev_config_dirty(rvd); 777 spa_config_exit(spa, SCL_STATE, FTAG); 778 779 spa_history_log_internal(spa, "guid change", tx, "old=%llu new=%llu", 780 oldguid, *newguid); 781} 782 783/* 784 * Change the GUID for the pool. This is done so that we can later 785 * re-import a pool built from a clone of our own vdevs. We will modify 786 * the root vdev's guid, our own pool guid, and then mark all of our 787 * vdevs dirty. Note that we must make sure that all our vdevs are 788 * online when we do this, or else any vdevs that weren't present 789 * would be orphaned from our pool. We are also going to issue a 790 * sysevent to update any watchers. 791 */ 792int 793spa_change_guid(spa_t *spa) 794{ 795 int error; 796 uint64_t guid; 797 798 mutex_enter(&spa->spa_vdev_top_lock); 799 mutex_enter(&spa_namespace_lock); 800 guid = spa_generate_guid(NULL); 801 802 error = dsl_sync_task(spa->spa_name, spa_change_guid_check, 803 spa_change_guid_sync, &guid, 5, ZFS_SPACE_CHECK_RESERVED); 804 805 if (error == 0) { 806 spa_config_sync(spa, B_FALSE, B_TRUE); 807 spa_event_notify(spa, NULL, ESC_ZFS_POOL_REGUID); 808 } 809 810 mutex_exit(&spa_namespace_lock); 811 mutex_exit(&spa->spa_vdev_top_lock); 812 813 return (error); 814} 815 816/* 817 * ========================================================================== 818 * SPA state manipulation (open/create/destroy/import/export) 819 * ========================================================================== 820 */ 821 822static int 823spa_error_entry_compare(const void *a, const void *b) 824{ 825 spa_error_entry_t *sa = (spa_error_entry_t *)a; 826 spa_error_entry_t *sb = (spa_error_entry_t *)b; 827 int ret; 828 829 ret = bcmp(&sa->se_bookmark, &sb->se_bookmark, 830 sizeof (zbookmark_phys_t)); 831 832 if (ret < 0) 833 return (-1); 834 else if (ret > 0) 835 return (1); 836 else 837 return (0); 838} 839 840/* 841 * Utility function which retrieves copies of the current logs and 842 * re-initializes them in the process. 843 */ 844void 845spa_get_errlists(spa_t *spa, avl_tree_t *last, avl_tree_t *scrub) 846{ 847 ASSERT(MUTEX_HELD(&spa->spa_errlist_lock)); 848 849 bcopy(&spa->spa_errlist_last, last, sizeof (avl_tree_t)); 850 bcopy(&spa->spa_errlist_scrub, scrub, sizeof (avl_tree_t)); 851 852 avl_create(&spa->spa_errlist_scrub, 853 spa_error_entry_compare, sizeof (spa_error_entry_t), 854 offsetof(spa_error_entry_t, se_avl)); 855 avl_create(&spa->spa_errlist_last, 856 spa_error_entry_compare, sizeof (spa_error_entry_t), 857 offsetof(spa_error_entry_t, se_avl)); 858} 859 860static void 861spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 862{ 863 const zio_taskq_info_t *ztip = &zio_taskqs[t][q]; 864 enum zti_modes mode = ztip->zti_mode; 865 uint_t value = ztip->zti_value; 866 uint_t count = ztip->zti_count; 867 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 868 char name[32]; 869 uint_t flags = 0; 870 boolean_t batch = B_FALSE; 871 872 if (mode == ZTI_MODE_NULL) { 873 tqs->stqs_count = 0; 874 tqs->stqs_taskq = NULL; 875 return; 876 } 877 878 ASSERT3U(count, >, 0); 879 880 tqs->stqs_count = count; 881 tqs->stqs_taskq = kmem_alloc(count * sizeof (taskq_t *), KM_SLEEP); 882 883 switch (mode) { 884 case ZTI_MODE_FIXED: 885 ASSERT3U(value, >=, 1); 886 value = MAX(value, 1); 887 break; 888 889 case ZTI_MODE_BATCH: 890 batch = B_TRUE; 891 flags |= TASKQ_THREADS_CPU_PCT; 892 value = zio_taskq_batch_pct; 893 break; 894 895 default: 896 panic("unrecognized mode for %s_%s taskq (%u:%u) in " 897 "spa_activate()", 898 zio_type_name[t], zio_taskq_types[q], mode, value); 899 break; 900 } 901 902 for (uint_t i = 0; i < count; i++) { 903 taskq_t *tq; 904 905 if (count > 1) { 906 (void) snprintf(name, sizeof (name), "%s_%s_%u", 907 zio_type_name[t], zio_taskq_types[q], i); 908 } else { 909 (void) snprintf(name, sizeof (name), "%s_%s", 910 zio_type_name[t], zio_taskq_types[q]); 911 } 912 913#ifdef SYSDC 914 if (zio_taskq_sysdc && spa->spa_proc != &p0) { 915 if (batch) 916 flags |= TASKQ_DC_BATCH; 917 918 tq = taskq_create_sysdc(name, value, 50, INT_MAX, 919 spa->spa_proc, zio_taskq_basedc, flags); 920 } else { 921#endif 922 pri_t pri = maxclsyspri; 923 /* 924 * The write issue taskq can be extremely CPU 925 * intensive. Run it at slightly lower priority 926 * than the other taskqs. 927 * FreeBSD notes: 928 * - numerically higher priorities are lower priorities; 929 * - if priorities divided by four (RQ_PPQ) are equal 930 * then a difference between them is insignificant. 931 */ 932 if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE) 933#ifdef illumos 934 pri--; 935#else 936 pri += 4; 937#endif 938 939 tq = taskq_create_proc(name, value, pri, 50, 940 INT_MAX, spa->spa_proc, flags); 941#ifdef SYSDC 942 } 943#endif 944 945 tqs->stqs_taskq[i] = tq; 946 } 947} 948 949static void 950spa_taskqs_fini(spa_t *spa, zio_type_t t, zio_taskq_type_t q) 951{ 952 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 953 954 if (tqs->stqs_taskq == NULL) { 955 ASSERT0(tqs->stqs_count); 956 return; 957 } 958 959 for (uint_t i = 0; i < tqs->stqs_count; i++) { 960 ASSERT3P(tqs->stqs_taskq[i], !=, NULL); 961 taskq_destroy(tqs->stqs_taskq[i]); 962 } 963 964 kmem_free(tqs->stqs_taskq, tqs->stqs_count * sizeof (taskq_t *)); 965 tqs->stqs_taskq = NULL; 966} 967 968/* 969 * Dispatch a task to the appropriate taskq for the ZFS I/O type and priority. 970 * Note that a type may have multiple discrete taskqs to avoid lock contention 971 * on the taskq itself. In that case we choose which taskq at random by using 972 * the low bits of gethrtime(). 973 */ 974void 975spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 976 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent) 977{ 978 spa_taskqs_t *tqs = &spa->spa_zio_taskq[t][q]; 979 taskq_t *tq; 980 981 ASSERT3P(tqs->stqs_taskq, !=, NULL); 982 ASSERT3U(tqs->stqs_count, !=, 0); 983 984 if (tqs->stqs_count == 1) { 985 tq = tqs->stqs_taskq[0]; 986 } else { 987#ifdef _KERNEL 988 tq = tqs->stqs_taskq[cpu_ticks() % tqs->stqs_count]; 989#else 990 tq = tqs->stqs_taskq[gethrtime() % tqs->stqs_count]; 991#endif 992 } 993 994 taskq_dispatch_ent(tq, func, arg, flags, ent); 995} 996 997static void 998spa_create_zio_taskqs(spa_t *spa) 999{ 1000 for (int t = 0; t < ZIO_TYPES; t++) { 1001 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1002 spa_taskqs_init(spa, t, q); 1003 } 1004 } 1005} 1006 1007#ifdef _KERNEL 1008#ifdef SPA_PROCESS 1009static void 1010spa_thread(void *arg) 1011{ 1012 callb_cpr_t cprinfo; 1013 1014 spa_t *spa = arg; 1015 user_t *pu = PTOU(curproc); 1016 1017 CALLB_CPR_INIT(&cprinfo, &spa->spa_proc_lock, callb_generic_cpr, 1018 spa->spa_name); 1019 1020 ASSERT(curproc != &p0); 1021 (void) snprintf(pu->u_psargs, sizeof (pu->u_psargs), 1022 "zpool-%s", spa->spa_name); 1023 (void) strlcpy(pu->u_comm, pu->u_psargs, sizeof (pu->u_comm)); 1024 1025#ifdef PSRSET_BIND 1026 /* bind this thread to the requested psrset */ 1027 if (zio_taskq_psrset_bind != PS_NONE) { 1028 pool_lock(); 1029 mutex_enter(&cpu_lock); 1030 mutex_enter(&pidlock); 1031 mutex_enter(&curproc->p_lock); 1032 1033 if (cpupart_bind_thread(curthread, zio_taskq_psrset_bind, 1034 0, NULL, NULL) == 0) { 1035 curthread->t_bind_pset = zio_taskq_psrset_bind; 1036 } else { 1037 cmn_err(CE_WARN, 1038 "Couldn't bind process for zfs pool \"%s\" to " 1039 "pset %d\n", spa->spa_name, zio_taskq_psrset_bind); 1040 } 1041 1042 mutex_exit(&curproc->p_lock); 1043 mutex_exit(&pidlock); 1044 mutex_exit(&cpu_lock); 1045 pool_unlock(); 1046 } 1047#endif 1048 1049#ifdef SYSDC 1050 if (zio_taskq_sysdc) { 1051 sysdc_thread_enter(curthread, 100, 0); 1052 } 1053#endif 1054 1055 spa->spa_proc = curproc; 1056 spa->spa_did = curthread->t_did; 1057 1058 spa_create_zio_taskqs(spa); 1059 1060 mutex_enter(&spa->spa_proc_lock); 1061 ASSERT(spa->spa_proc_state == SPA_PROC_CREATED); 1062 1063 spa->spa_proc_state = SPA_PROC_ACTIVE; 1064 cv_broadcast(&spa->spa_proc_cv); 1065 1066 CALLB_CPR_SAFE_BEGIN(&cprinfo); 1067 while (spa->spa_proc_state == SPA_PROC_ACTIVE) 1068 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1069 CALLB_CPR_SAFE_END(&cprinfo, &spa->spa_proc_lock); 1070 1071 ASSERT(spa->spa_proc_state == SPA_PROC_DEACTIVATE); 1072 spa->spa_proc_state = SPA_PROC_GONE; 1073 spa->spa_proc = &p0; 1074 cv_broadcast(&spa->spa_proc_cv); 1075 CALLB_CPR_EXIT(&cprinfo); /* drops spa_proc_lock */ 1076 1077 mutex_enter(&curproc->p_lock); 1078 lwp_exit(); 1079} 1080#endif /* SPA_PROCESS */ 1081#endif 1082 1083/* 1084 * Activate an uninitialized pool. 1085 */ 1086static void 1087spa_activate(spa_t *spa, int mode) 1088{ 1089 ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 1090 1091 spa->spa_state = POOL_STATE_ACTIVE; 1092 spa->spa_mode = mode; 1093 1094 spa->spa_normal_class = metaslab_class_create(spa, zfs_metaslab_ops); 1095 spa->spa_log_class = metaslab_class_create(spa, zfs_metaslab_ops); 1096 1097 /* Try to create a covering process */ 1098 mutex_enter(&spa->spa_proc_lock); 1099 ASSERT(spa->spa_proc_state == SPA_PROC_NONE); 1100 ASSERT(spa->spa_proc == &p0); 1101 spa->spa_did = 0; 1102 1103#ifdef SPA_PROCESS 1104 /* Only create a process if we're going to be around a while. */ 1105 if (spa_create_process && strcmp(spa->spa_name, TRYIMPORT_NAME) != 0) { 1106 if (newproc(spa_thread, (caddr_t)spa, syscid, maxclsyspri, 1107 NULL, 0) == 0) { 1108 spa->spa_proc_state = SPA_PROC_CREATED; 1109 while (spa->spa_proc_state == SPA_PROC_CREATED) { 1110 cv_wait(&spa->spa_proc_cv, 1111 &spa->spa_proc_lock); 1112 } 1113 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1114 ASSERT(spa->spa_proc != &p0); 1115 ASSERT(spa->spa_did != 0); 1116 } else { 1117#ifdef _KERNEL 1118 cmn_err(CE_WARN, 1119 "Couldn't create process for zfs pool \"%s\"\n", 1120 spa->spa_name); 1121#endif 1122 } 1123 } 1124#endif /* SPA_PROCESS */ 1125 mutex_exit(&spa->spa_proc_lock); 1126 1127 /* If we didn't create a process, we need to create our taskqs. */ 1128 ASSERT(spa->spa_proc == &p0); 1129 if (spa->spa_proc == &p0) { 1130 spa_create_zio_taskqs(spa); 1131 } 1132 1133 /* 1134 * Start TRIM thread. 1135 */ 1136 trim_thread_create(spa); 1137 1138 list_create(&spa->spa_config_dirty_list, sizeof (vdev_t), 1139 offsetof(vdev_t, vdev_config_dirty_node)); 1140 list_create(&spa->spa_evicting_os_list, sizeof (objset_t), 1141 offsetof(objset_t, os_evicting_node)); 1142 list_create(&spa->spa_state_dirty_list, sizeof (vdev_t), 1143 offsetof(vdev_t, vdev_state_dirty_node)); 1144 1145 txg_list_create(&spa->spa_vdev_txg_list, spa, 1146 offsetof(struct vdev, vdev_txg_node)); 1147 1148 avl_create(&spa->spa_errlist_scrub, 1149 spa_error_entry_compare, sizeof (spa_error_entry_t), 1150 offsetof(spa_error_entry_t, se_avl)); 1151 avl_create(&spa->spa_errlist_last, 1152 spa_error_entry_compare, sizeof (spa_error_entry_t), 1153 offsetof(spa_error_entry_t, se_avl)); 1154} 1155 1156/* 1157 * Opposite of spa_activate(). 1158 */ 1159static void 1160spa_deactivate(spa_t *spa) 1161{ 1162 ASSERT(spa->spa_sync_on == B_FALSE); 1163 ASSERT(spa->spa_dsl_pool == NULL); 1164 ASSERT(spa->spa_root_vdev == NULL); 1165 ASSERT(spa->spa_async_zio_root == NULL); 1166 ASSERT(spa->spa_state != POOL_STATE_UNINITIALIZED); 1167 1168 /* 1169 * Stop TRIM thread in case spa_unload() wasn't called directly 1170 * before spa_deactivate(). 1171 */ 1172 trim_thread_destroy(spa); 1173 1174 spa_evicting_os_wait(spa); 1175 1176 txg_list_destroy(&spa->spa_vdev_txg_list); 1177 1178 list_destroy(&spa->spa_config_dirty_list); 1179 list_destroy(&spa->spa_evicting_os_list); 1180 list_destroy(&spa->spa_state_dirty_list); 1181 1182 for (int t = 0; t < ZIO_TYPES; t++) { 1183 for (int q = 0; q < ZIO_TASKQ_TYPES; q++) { 1184 spa_taskqs_fini(spa, t, q); 1185 } 1186 } 1187 1188 metaslab_class_destroy(spa->spa_normal_class); 1189 spa->spa_normal_class = NULL; 1190 1191 metaslab_class_destroy(spa->spa_log_class); 1192 spa->spa_log_class = NULL; 1193 1194 /* 1195 * If this was part of an import or the open otherwise failed, we may 1196 * still have errors left in the queues. Empty them just in case. 1197 */ 1198 spa_errlog_drain(spa); 1199 1200 avl_destroy(&spa->spa_errlist_scrub); 1201 avl_destroy(&spa->spa_errlist_last); 1202 1203 spa->spa_state = POOL_STATE_UNINITIALIZED; 1204 1205 mutex_enter(&spa->spa_proc_lock); 1206 if (spa->spa_proc_state != SPA_PROC_NONE) { 1207 ASSERT(spa->spa_proc_state == SPA_PROC_ACTIVE); 1208 spa->spa_proc_state = SPA_PROC_DEACTIVATE; 1209 cv_broadcast(&spa->spa_proc_cv); 1210 while (spa->spa_proc_state == SPA_PROC_DEACTIVATE) { 1211 ASSERT(spa->spa_proc != &p0); 1212 cv_wait(&spa->spa_proc_cv, &spa->spa_proc_lock); 1213 } 1214 ASSERT(spa->spa_proc_state == SPA_PROC_GONE); 1215 spa->spa_proc_state = SPA_PROC_NONE; 1216 } 1217 ASSERT(spa->spa_proc == &p0); 1218 mutex_exit(&spa->spa_proc_lock); 1219 1220#ifdef SPA_PROCESS 1221 /* 1222 * We want to make sure spa_thread() has actually exited the ZFS 1223 * module, so that the module can't be unloaded out from underneath 1224 * it. 1225 */ 1226 if (spa->spa_did != 0) { 1227 thread_join(spa->spa_did); 1228 spa->spa_did = 0; 1229 } 1230#endif /* SPA_PROCESS */ 1231} 1232 1233/* 1234 * Verify a pool configuration, and construct the vdev tree appropriately. This 1235 * will create all the necessary vdevs in the appropriate layout, with each vdev 1236 * in the CLOSED state. This will prep the pool before open/creation/import. 1237 * All vdev validation is done by the vdev_alloc() routine. 1238 */ 1239static int 1240spa_config_parse(spa_t *spa, vdev_t **vdp, nvlist_t *nv, vdev_t *parent, 1241 uint_t id, int atype) 1242{ 1243 nvlist_t **child; 1244 uint_t children; 1245 int error; 1246 1247 if ((error = vdev_alloc(spa, vdp, nv, parent, id, atype)) != 0) 1248 return (error); 1249 1250 if ((*vdp)->vdev_ops->vdev_op_leaf) 1251 return (0); 1252 1253 error = nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 1254 &child, &children); 1255 1256 if (error == ENOENT) 1257 return (0); 1258 1259 if (error) { 1260 vdev_free(*vdp); 1261 *vdp = NULL; 1262 return (SET_ERROR(EINVAL)); 1263 } 1264 1265 for (int c = 0; c < children; c++) { 1266 vdev_t *vd; 1267 if ((error = spa_config_parse(spa, &vd, child[c], *vdp, c, 1268 atype)) != 0) { 1269 vdev_free(*vdp); 1270 *vdp = NULL; 1271 return (error); 1272 } 1273 } 1274 1275 ASSERT(*vdp != NULL); 1276 1277 return (0); 1278} 1279 1280/* 1281 * Opposite of spa_load(). 1282 */ 1283static void 1284spa_unload(spa_t *spa) 1285{ 1286 int i; 1287 1288 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1289 1290 /* 1291 * Stop TRIM thread. 1292 */ 1293 trim_thread_destroy(spa); 1294 1295 /* 1296 * Stop async tasks. 1297 */ 1298 spa_async_suspend(spa); 1299 1300 /* 1301 * Stop syncing. 1302 */ 1303 if (spa->spa_sync_on) { 1304 txg_sync_stop(spa->spa_dsl_pool); 1305 spa->spa_sync_on = B_FALSE; 1306 } 1307 1308 /* 1309 * Even though vdev_free() also calls vdev_metaslab_fini, we need 1310 * to call it earlier, before we wait for async i/o to complete. 1311 * This ensures that there is no async metaslab prefetching, by 1312 * calling taskq_wait(mg_taskq). 1313 */ 1314 if (spa->spa_root_vdev != NULL) { 1315 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1316 for (int c = 0; c < spa->spa_root_vdev->vdev_children; c++) 1317 vdev_metaslab_fini(spa->spa_root_vdev->vdev_child[c]); 1318 spa_config_exit(spa, SCL_ALL, FTAG); 1319 } 1320 1321 /* 1322 * Wait for any outstanding async I/O to complete. 1323 */ 1324 if (spa->spa_async_zio_root != NULL) { 1325 for (int i = 0; i < max_ncpus; i++) 1326 (void) zio_wait(spa->spa_async_zio_root[i]); 1327 kmem_free(spa->spa_async_zio_root, max_ncpus * sizeof (void *)); 1328 spa->spa_async_zio_root = NULL; 1329 } 1330 1331 bpobj_close(&spa->spa_deferred_bpobj); 1332 1333 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1334 1335 /* 1336 * Close all vdevs. 1337 */ 1338 if (spa->spa_root_vdev) 1339 vdev_free(spa->spa_root_vdev); 1340 ASSERT(spa->spa_root_vdev == NULL); 1341 1342 /* 1343 * Close the dsl pool. 1344 */ 1345 if (spa->spa_dsl_pool) { 1346 dsl_pool_close(spa->spa_dsl_pool); 1347 spa->spa_dsl_pool = NULL; 1348 spa->spa_meta_objset = NULL; 1349 } 1350 1351 ddt_unload(spa); 1352 1353 /* 1354 * Drop and purge level 2 cache 1355 */ 1356 spa_l2cache_drop(spa); 1357 1358 for (i = 0; i < spa->spa_spares.sav_count; i++) 1359 vdev_free(spa->spa_spares.sav_vdevs[i]); 1360 if (spa->spa_spares.sav_vdevs) { 1361 kmem_free(spa->spa_spares.sav_vdevs, 1362 spa->spa_spares.sav_count * sizeof (void *)); 1363 spa->spa_spares.sav_vdevs = NULL; 1364 } 1365 if (spa->spa_spares.sav_config) { 1366 nvlist_free(spa->spa_spares.sav_config); 1367 spa->spa_spares.sav_config = NULL; 1368 } 1369 spa->spa_spares.sav_count = 0; 1370 1371 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 1372 vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]); 1373 vdev_free(spa->spa_l2cache.sav_vdevs[i]); 1374 } 1375 if (spa->spa_l2cache.sav_vdevs) { 1376 kmem_free(spa->spa_l2cache.sav_vdevs, 1377 spa->spa_l2cache.sav_count * sizeof (void *)); 1378 spa->spa_l2cache.sav_vdevs = NULL; 1379 } 1380 if (spa->spa_l2cache.sav_config) { 1381 nvlist_free(spa->spa_l2cache.sav_config); 1382 spa->spa_l2cache.sav_config = NULL; 1383 } 1384 spa->spa_l2cache.sav_count = 0; 1385 1386 spa->spa_async_suspended = 0; 1387 1388 if (spa->spa_comment != NULL) { 1389 spa_strfree(spa->spa_comment); 1390 spa->spa_comment = NULL; 1391 } 1392 1393 spa_config_exit(spa, SCL_ALL, FTAG); 1394} 1395 1396/* 1397 * Load (or re-load) the current list of vdevs describing the active spares for 1398 * this pool. When this is called, we have some form of basic information in 1399 * 'spa_spares.sav_config'. We parse this into vdevs, try to open them, and 1400 * then re-generate a more complete list including status information. 1401 */ 1402static void 1403spa_load_spares(spa_t *spa) 1404{ 1405 nvlist_t **spares; 1406 uint_t nspares; 1407 int i; 1408 vdev_t *vd, *tvd; 1409 1410 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1411 1412 /* 1413 * First, close and free any existing spare vdevs. 1414 */ 1415 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1416 vd = spa->spa_spares.sav_vdevs[i]; 1417 1418 /* Undo the call to spa_activate() below */ 1419 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1420 B_FALSE)) != NULL && tvd->vdev_isspare) 1421 spa_spare_remove(tvd); 1422 vdev_close(vd); 1423 vdev_free(vd); 1424 } 1425 1426 if (spa->spa_spares.sav_vdevs) 1427 kmem_free(spa->spa_spares.sav_vdevs, 1428 spa->spa_spares.sav_count * sizeof (void *)); 1429 1430 if (spa->spa_spares.sav_config == NULL) 1431 nspares = 0; 1432 else 1433 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 1434 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 1435 1436 spa->spa_spares.sav_count = (int)nspares; 1437 spa->spa_spares.sav_vdevs = NULL; 1438 1439 if (nspares == 0) 1440 return; 1441 1442 /* 1443 * Construct the array of vdevs, opening them to get status in the 1444 * process. For each spare, there is potentially two different vdev_t 1445 * structures associated with it: one in the list of spares (used only 1446 * for basic validation purposes) and one in the active vdev 1447 * configuration (if it's spared in). During this phase we open and 1448 * validate each vdev on the spare list. If the vdev also exists in the 1449 * active configuration, then we also mark this vdev as an active spare. 1450 */ 1451 spa->spa_spares.sav_vdevs = kmem_alloc(nspares * sizeof (void *), 1452 KM_SLEEP); 1453 for (i = 0; i < spa->spa_spares.sav_count; i++) { 1454 VERIFY(spa_config_parse(spa, &vd, spares[i], NULL, 0, 1455 VDEV_ALLOC_SPARE) == 0); 1456 ASSERT(vd != NULL); 1457 1458 spa->spa_spares.sav_vdevs[i] = vd; 1459 1460 if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid, 1461 B_FALSE)) != NULL) { 1462 if (!tvd->vdev_isspare) 1463 spa_spare_add(tvd); 1464 1465 /* 1466 * We only mark the spare active if we were successfully 1467 * able to load the vdev. Otherwise, importing a pool 1468 * with a bad active spare would result in strange 1469 * behavior, because multiple pool would think the spare 1470 * is actively in use. 1471 * 1472 * There is a vulnerability here to an equally bizarre 1473 * circumstance, where a dead active spare is later 1474 * brought back to life (onlined or otherwise). Given 1475 * the rarity of this scenario, and the extra complexity 1476 * it adds, we ignore the possibility. 1477 */ 1478 if (!vdev_is_dead(tvd)) 1479 spa_spare_activate(tvd); 1480 } 1481 1482 vd->vdev_top = vd; 1483 vd->vdev_aux = &spa->spa_spares; 1484 1485 if (vdev_open(vd) != 0) 1486 continue; 1487 1488 if (vdev_validate_aux(vd) == 0) 1489 spa_spare_add(vd); 1490 } 1491 1492 /* 1493 * Recompute the stashed list of spares, with status information 1494 * this time. 1495 */ 1496 VERIFY(nvlist_remove(spa->spa_spares.sav_config, ZPOOL_CONFIG_SPARES, 1497 DATA_TYPE_NVLIST_ARRAY) == 0); 1498 1499 spares = kmem_alloc(spa->spa_spares.sav_count * sizeof (void *), 1500 KM_SLEEP); 1501 for (i = 0; i < spa->spa_spares.sav_count; i++) 1502 spares[i] = vdev_config_generate(spa, 1503 spa->spa_spares.sav_vdevs[i], B_TRUE, VDEV_CONFIG_SPARE); 1504 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 1505 ZPOOL_CONFIG_SPARES, spares, spa->spa_spares.sav_count) == 0); 1506 for (i = 0; i < spa->spa_spares.sav_count; i++) 1507 nvlist_free(spares[i]); 1508 kmem_free(spares, spa->spa_spares.sav_count * sizeof (void *)); 1509} 1510 1511/* 1512 * Load (or re-load) the current list of vdevs describing the active l2cache for 1513 * this pool. When this is called, we have some form of basic information in 1514 * 'spa_l2cache.sav_config'. We parse this into vdevs, try to open them, and 1515 * then re-generate a more complete list including status information. 1516 * Devices which are already active have their details maintained, and are 1517 * not re-opened. 1518 */ 1519static void 1520spa_load_l2cache(spa_t *spa) 1521{ 1522 nvlist_t **l2cache; 1523 uint_t nl2cache; 1524 int i, j, oldnvdevs; 1525 uint64_t guid; 1526 vdev_t *vd, **oldvdevs, **newvdevs; 1527 spa_aux_vdev_t *sav = &spa->spa_l2cache; 1528 1529 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 1530 1531 if (sav->sav_config != NULL) { 1532 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, 1533 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 1534 newvdevs = kmem_alloc(nl2cache * sizeof (void *), KM_SLEEP); 1535 } else { 1536 nl2cache = 0; 1537 newvdevs = NULL; 1538 } 1539 1540 oldvdevs = sav->sav_vdevs; 1541 oldnvdevs = sav->sav_count; 1542 sav->sav_vdevs = NULL; 1543 sav->sav_count = 0; 1544 1545 /* 1546 * Process new nvlist of vdevs. 1547 */ 1548 for (i = 0; i < nl2cache; i++) { 1549 VERIFY(nvlist_lookup_uint64(l2cache[i], ZPOOL_CONFIG_GUID, 1550 &guid) == 0); 1551 1552 newvdevs[i] = NULL; 1553 for (j = 0; j < oldnvdevs; j++) { 1554 vd = oldvdevs[j]; 1555 if (vd != NULL && guid == vd->vdev_guid) { 1556 /* 1557 * Retain previous vdev for add/remove ops. 1558 */ 1559 newvdevs[i] = vd; 1560 oldvdevs[j] = NULL; 1561 break; 1562 } 1563 } 1564 1565 if (newvdevs[i] == NULL) { 1566 /* 1567 * Create new vdev 1568 */ 1569 VERIFY(spa_config_parse(spa, &vd, l2cache[i], NULL, 0, 1570 VDEV_ALLOC_L2CACHE) == 0); 1571 ASSERT(vd != NULL); 1572 newvdevs[i] = vd; 1573 1574 /* 1575 * Commit this vdev as an l2cache device, 1576 * even if it fails to open. 1577 */ 1578 spa_l2cache_add(vd); 1579 1580 vd->vdev_top = vd; 1581 vd->vdev_aux = sav; 1582 1583 spa_l2cache_activate(vd); 1584 1585 if (vdev_open(vd) != 0) 1586 continue; 1587 1588 (void) vdev_validate_aux(vd); 1589 1590 if (!vdev_is_dead(vd)) 1591 l2arc_add_vdev(spa, vd); 1592 } 1593 } 1594 1595 /* 1596 * Purge vdevs that were dropped 1597 */ 1598 for (i = 0; i < oldnvdevs; i++) { 1599 uint64_t pool; 1600 1601 vd = oldvdevs[i]; 1602 if (vd != NULL) { 1603 ASSERT(vd->vdev_isl2cache); 1604 1605 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 1606 pool != 0ULL && l2arc_vdev_present(vd)) 1607 l2arc_remove_vdev(vd); 1608 vdev_clear_stats(vd); 1609 vdev_free(vd); 1610 } 1611 } 1612 1613 if (oldvdevs) 1614 kmem_free(oldvdevs, oldnvdevs * sizeof (void *)); 1615 1616 if (sav->sav_config == NULL) 1617 goto out; 1618 1619 sav->sav_vdevs = newvdevs; 1620 sav->sav_count = (int)nl2cache; 1621 1622 /* 1623 * Recompute the stashed list of l2cache devices, with status 1624 * information this time. 1625 */ 1626 VERIFY(nvlist_remove(sav->sav_config, ZPOOL_CONFIG_L2CACHE, 1627 DATA_TYPE_NVLIST_ARRAY) == 0); 1628 1629 l2cache = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 1630 for (i = 0; i < sav->sav_count; i++) 1631 l2cache[i] = vdev_config_generate(spa, 1632 sav->sav_vdevs[i], B_TRUE, VDEV_CONFIG_L2CACHE); 1633 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 1634 ZPOOL_CONFIG_L2CACHE, l2cache, sav->sav_count) == 0); 1635out: 1636 for (i = 0; i < sav->sav_count; i++) 1637 nvlist_free(l2cache[i]); 1638 if (sav->sav_count) 1639 kmem_free(l2cache, sav->sav_count * sizeof (void *)); 1640} 1641 1642static int 1643load_nvlist(spa_t *spa, uint64_t obj, nvlist_t **value) 1644{ 1645 dmu_buf_t *db; 1646 char *packed = NULL; 1647 size_t nvsize = 0; 1648 int error; 1649 *value = NULL; 1650 1651 error = dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db); 1652 if (error != 0) 1653 return (error); 1654 1655 nvsize = *(uint64_t *)db->db_data; 1656 dmu_buf_rele(db, FTAG); 1657 1658 packed = kmem_alloc(nvsize, KM_SLEEP); 1659 error = dmu_read(spa->spa_meta_objset, obj, 0, nvsize, packed, 1660 DMU_READ_PREFETCH); 1661 if (error == 0) 1662 error = nvlist_unpack(packed, nvsize, value, 0); 1663 kmem_free(packed, nvsize); 1664 1665 return (error); 1666} 1667 1668/* 1669 * Checks to see if the given vdev could not be opened, in which case we post a 1670 * sysevent to notify the autoreplace code that the device has been removed. 1671 */ 1672static void 1673spa_check_removed(vdev_t *vd) 1674{ 1675 for (int c = 0; c < vd->vdev_children; c++) 1676 spa_check_removed(vd->vdev_child[c]); 1677 1678 if (vd->vdev_ops->vdev_op_leaf && vdev_is_dead(vd) && 1679 !vd->vdev_ishole) { 1680 zfs_post_autoreplace(vd->vdev_spa, vd); 1681 spa_event_notify(vd->vdev_spa, vd, ESC_ZFS_VDEV_CHECK); 1682 } 1683} 1684 1685static void 1686spa_config_valid_zaps(vdev_t *vd, vdev_t *mvd) 1687{ 1688 ASSERT3U(vd->vdev_children, ==, mvd->vdev_children); 1689 1690 vd->vdev_top_zap = mvd->vdev_top_zap; 1691 vd->vdev_leaf_zap = mvd->vdev_leaf_zap; 1692 1693 for (uint64_t i = 0; i < vd->vdev_children; i++) { 1694 spa_config_valid_zaps(vd->vdev_child[i], mvd->vdev_child[i]); 1695 } 1696} 1697 1698/* 1699 * Validate the current config against the MOS config 1700 */ 1701static boolean_t 1702spa_config_valid(spa_t *spa, nvlist_t *config) 1703{ 1704 vdev_t *mrvd, *rvd = spa->spa_root_vdev; 1705 nvlist_t *nv; 1706 1707 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nv) == 0); 1708 1709 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1710 VERIFY(spa_config_parse(spa, &mrvd, nv, NULL, 0, VDEV_ALLOC_LOAD) == 0); 1711 1712 ASSERT3U(rvd->vdev_children, ==, mrvd->vdev_children); 1713 1714 /* 1715 * If we're doing a normal import, then build up any additional 1716 * diagnostic information about missing devices in this config. 1717 * We'll pass this up to the user for further processing. 1718 */ 1719 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) { 1720 nvlist_t **child, *nv; 1721 uint64_t idx = 0; 1722 1723 child = kmem_alloc(rvd->vdev_children * sizeof (nvlist_t **), 1724 KM_SLEEP); 1725 VERIFY(nvlist_alloc(&nv, NV_UNIQUE_NAME, KM_SLEEP) == 0); 1726 1727 for (int c = 0; c < rvd->vdev_children; c++) { 1728 vdev_t *tvd = rvd->vdev_child[c]; 1729 vdev_t *mtvd = mrvd->vdev_child[c]; 1730 1731 if (tvd->vdev_ops == &vdev_missing_ops && 1732 mtvd->vdev_ops != &vdev_missing_ops && 1733 mtvd->vdev_islog) 1734 child[idx++] = vdev_config_generate(spa, mtvd, 1735 B_FALSE, 0); 1736 } 1737 1738 if (idx) { 1739 VERIFY(nvlist_add_nvlist_array(nv, 1740 ZPOOL_CONFIG_CHILDREN, child, idx) == 0); 1741 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 1742 ZPOOL_CONFIG_MISSING_DEVICES, nv) == 0); 1743 1744 for (int i = 0; i < idx; i++) 1745 nvlist_free(child[i]); 1746 } 1747 nvlist_free(nv); 1748 kmem_free(child, rvd->vdev_children * sizeof (char **)); 1749 } 1750 1751 /* 1752 * Compare the root vdev tree with the information we have 1753 * from the MOS config (mrvd). Check each top-level vdev 1754 * with the corresponding MOS config top-level (mtvd). 1755 */ 1756 for (int c = 0; c < rvd->vdev_children; c++) { 1757 vdev_t *tvd = rvd->vdev_child[c]; 1758 vdev_t *mtvd = mrvd->vdev_child[c]; 1759 1760 /* 1761 * Resolve any "missing" vdevs in the current configuration. 1762 * If we find that the MOS config has more accurate information 1763 * about the top-level vdev then use that vdev instead. 1764 */ 1765 if (tvd->vdev_ops == &vdev_missing_ops && 1766 mtvd->vdev_ops != &vdev_missing_ops) { 1767 1768 if (!(spa->spa_import_flags & ZFS_IMPORT_MISSING_LOG)) 1769 continue; 1770 1771 /* 1772 * Device specific actions. 1773 */ 1774 if (mtvd->vdev_islog) { 1775 spa_set_log_state(spa, SPA_LOG_CLEAR); 1776 } else { 1777 /* 1778 * XXX - once we have 'readonly' pool 1779 * support we should be able to handle 1780 * missing data devices by transitioning 1781 * the pool to readonly. 1782 */ 1783 continue; 1784 } 1785 1786 /* 1787 * Swap the missing vdev with the data we were 1788 * able to obtain from the MOS config. 1789 */ 1790 vdev_remove_child(rvd, tvd); 1791 vdev_remove_child(mrvd, mtvd); 1792 1793 vdev_add_child(rvd, mtvd); 1794 vdev_add_child(mrvd, tvd); 1795 1796 spa_config_exit(spa, SCL_ALL, FTAG); 1797 vdev_load(mtvd); 1798 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1799 1800 vdev_reopen(rvd); 1801 } else { 1802 if (mtvd->vdev_islog) { 1803 /* 1804 * Load the slog device's state from the MOS 1805 * config since it's possible that the label 1806 * does not contain the most up-to-date 1807 * information. 1808 */ 1809 vdev_load_log_state(tvd, mtvd); 1810 vdev_reopen(tvd); 1811 } 1812 1813 /* 1814 * Per-vdev ZAP info is stored exclusively in the MOS. 1815 */ 1816 spa_config_valid_zaps(tvd, mtvd); 1817 } 1818 } 1819 1820 vdev_free(mrvd); 1821 spa_config_exit(spa, SCL_ALL, FTAG); 1822 1823 /* 1824 * Ensure we were able to validate the config. 1825 */ 1826 return (rvd->vdev_guid_sum == spa->spa_uberblock.ub_guid_sum); 1827} 1828 1829/* 1830 * Check for missing log devices 1831 */ 1832static boolean_t 1833spa_check_logs(spa_t *spa) 1834{ 1835 boolean_t rv = B_FALSE; 1836 dsl_pool_t *dp = spa_get_dsl(spa); 1837 1838 switch (spa->spa_log_state) { 1839 case SPA_LOG_MISSING: 1840 /* need to recheck in case slog has been restored */ 1841 case SPA_LOG_UNKNOWN: 1842 rv = (dmu_objset_find_dp(dp, dp->dp_root_dir_obj, 1843 zil_check_log_chain, NULL, DS_FIND_CHILDREN) != 0); 1844 if (rv) 1845 spa_set_log_state(spa, SPA_LOG_MISSING); 1846 break; 1847 } 1848 return (rv); 1849} 1850 1851static boolean_t 1852spa_passivate_log(spa_t *spa) 1853{ 1854 vdev_t *rvd = spa->spa_root_vdev; 1855 boolean_t slog_found = B_FALSE; 1856 1857 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1858 1859 if (!spa_has_slogs(spa)) 1860 return (B_FALSE); 1861 1862 for (int c = 0; c < rvd->vdev_children; c++) { 1863 vdev_t *tvd = rvd->vdev_child[c]; 1864 metaslab_group_t *mg = tvd->vdev_mg; 1865 1866 if (tvd->vdev_islog) { 1867 metaslab_group_passivate(mg); 1868 slog_found = B_TRUE; 1869 } 1870 } 1871 1872 return (slog_found); 1873} 1874 1875static void 1876spa_activate_log(spa_t *spa) 1877{ 1878 vdev_t *rvd = spa->spa_root_vdev; 1879 1880 ASSERT(spa_config_held(spa, SCL_ALLOC, RW_WRITER)); 1881 1882 for (int c = 0; c < rvd->vdev_children; c++) { 1883 vdev_t *tvd = rvd->vdev_child[c]; 1884 metaslab_group_t *mg = tvd->vdev_mg; 1885 1886 if (tvd->vdev_islog) 1887 metaslab_group_activate(mg); 1888 } 1889} 1890 1891int 1892spa_offline_log(spa_t *spa) 1893{ 1894 int error; 1895 1896 error = dmu_objset_find(spa_name(spa), zil_vdev_offline, 1897 NULL, DS_FIND_CHILDREN); 1898 if (error == 0) { 1899 /* 1900 * We successfully offlined the log device, sync out the 1901 * current txg so that the "stubby" block can be removed 1902 * by zil_sync(). 1903 */ 1904 txg_wait_synced(spa->spa_dsl_pool, 0); 1905 } 1906 return (error); 1907} 1908 1909static void 1910spa_aux_check_removed(spa_aux_vdev_t *sav) 1911{ 1912 int i; 1913 1914 for (i = 0; i < sav->sav_count; i++) 1915 spa_check_removed(sav->sav_vdevs[i]); 1916} 1917 1918void 1919spa_claim_notify(zio_t *zio) 1920{ 1921 spa_t *spa = zio->io_spa; 1922 1923 if (zio->io_error) 1924 return; 1925 1926 mutex_enter(&spa->spa_props_lock); /* any mutex will do */ 1927 if (spa->spa_claim_max_txg < zio->io_bp->blk_birth) 1928 spa->spa_claim_max_txg = zio->io_bp->blk_birth; 1929 mutex_exit(&spa->spa_props_lock); 1930} 1931 1932typedef struct spa_load_error { 1933 uint64_t sle_meta_count; 1934 uint64_t sle_data_count; 1935} spa_load_error_t; 1936 1937static void 1938spa_load_verify_done(zio_t *zio) 1939{ 1940 blkptr_t *bp = zio->io_bp; 1941 spa_load_error_t *sle = zio->io_private; 1942 dmu_object_type_t type = BP_GET_TYPE(bp); 1943 int error = zio->io_error; 1944 spa_t *spa = zio->io_spa; 1945 1946 abd_free(zio->io_abd); 1947 if (error) { 1948 if ((BP_GET_LEVEL(bp) != 0 || DMU_OT_IS_METADATA(type)) && 1949 type != DMU_OT_INTENT_LOG) 1950 atomic_inc_64(&sle->sle_meta_count); 1951 else 1952 atomic_inc_64(&sle->sle_data_count); 1953 } 1954 1955 mutex_enter(&spa->spa_scrub_lock); 1956 spa->spa_scrub_inflight--; 1957 cv_broadcast(&spa->spa_scrub_io_cv); 1958 mutex_exit(&spa->spa_scrub_lock); 1959} 1960 1961/* 1962 * Maximum number of concurrent scrub i/os to create while verifying 1963 * a pool while importing it. 1964 */ 1965int spa_load_verify_maxinflight = 10000; 1966boolean_t spa_load_verify_metadata = B_TRUE; 1967boolean_t spa_load_verify_data = B_TRUE; 1968 1969SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_maxinflight, CTLFLAG_RWTUN, 1970 &spa_load_verify_maxinflight, 0, 1971 "Maximum number of concurrent scrub I/Os to create while verifying a " 1972 "pool while importing it"); 1973 1974SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_metadata, CTLFLAG_RWTUN, 1975 &spa_load_verify_metadata, 0, 1976 "Check metadata on import?"); 1977 1978SYSCTL_INT(_vfs_zfs, OID_AUTO, spa_load_verify_data, CTLFLAG_RWTUN, 1979 &spa_load_verify_data, 0, 1980 "Check user data on import?"); 1981 1982/*ARGSUSED*/ 1983static int 1984spa_load_verify_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, 1985 const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) 1986{ 1987 if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp)) 1988 return (0); 1989 /* 1990 * Note: normally this routine will not be called if 1991 * spa_load_verify_metadata is not set. However, it may be useful 1992 * to manually set the flag after the traversal has begun. 1993 */ 1994 if (!spa_load_verify_metadata) 1995 return (0); 1996 if (!BP_IS_METADATA(bp) && !spa_load_verify_data) 1997 return (0); 1998 1999 zio_t *rio = arg; 2000 size_t size = BP_GET_PSIZE(bp); 2001 2002 mutex_enter(&spa->spa_scrub_lock); 2003 while (spa->spa_scrub_inflight >= spa_load_verify_maxinflight) 2004 cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock); 2005 spa->spa_scrub_inflight++; 2006 mutex_exit(&spa->spa_scrub_lock); 2007 2008 zio_nowait(zio_read(rio, spa, bp, abd_alloc_for_io(size, B_FALSE), size, 2009 spa_load_verify_done, rio->io_private, ZIO_PRIORITY_SCRUB, 2010 ZIO_FLAG_SPECULATIVE | ZIO_FLAG_CANFAIL | 2011 ZIO_FLAG_SCRUB | ZIO_FLAG_RAW, zb)); 2012 return (0); 2013} 2014 2015/* ARGSUSED */ 2016int 2017verify_dataset_name_len(dsl_pool_t *dp, dsl_dataset_t *ds, void *arg) 2018{ 2019 if (dsl_dataset_namelen(ds) >= ZFS_MAX_DATASET_NAME_LEN) 2020 return (SET_ERROR(ENAMETOOLONG)); 2021 2022 return (0); 2023} 2024 2025static int 2026spa_load_verify(spa_t *spa) 2027{ 2028 zio_t *rio; 2029 spa_load_error_t sle = { 0 }; 2030 zpool_rewind_policy_t policy; 2031 boolean_t verify_ok = B_FALSE; 2032 int error = 0; 2033 2034 zpool_get_rewind_policy(spa->spa_config, &policy); 2035 2036 if (policy.zrp_request & ZPOOL_NEVER_REWIND) 2037 return (0); 2038 2039 dsl_pool_config_enter(spa->spa_dsl_pool, FTAG); 2040 error = dmu_objset_find_dp(spa->spa_dsl_pool, 2041 spa->spa_dsl_pool->dp_root_dir_obj, verify_dataset_name_len, NULL, 2042 DS_FIND_CHILDREN); 2043 dsl_pool_config_exit(spa->spa_dsl_pool, FTAG); 2044 if (error != 0) 2045 return (error); 2046 2047 rio = zio_root(spa, NULL, &sle, 2048 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE); 2049 2050 if (spa_load_verify_metadata) { 2051 error = traverse_pool(spa, spa->spa_verify_min_txg, 2052 TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA, 2053 spa_load_verify_cb, rio); 2054 } 2055 2056 (void) zio_wait(rio); 2057 2058 spa->spa_load_meta_errors = sle.sle_meta_count; 2059 spa->spa_load_data_errors = sle.sle_data_count; 2060 2061 if (!error && sle.sle_meta_count <= policy.zrp_maxmeta && 2062 sle.sle_data_count <= policy.zrp_maxdata) { 2063 int64_t loss = 0; 2064 2065 verify_ok = B_TRUE; 2066 spa->spa_load_txg = spa->spa_uberblock.ub_txg; 2067 spa->spa_load_txg_ts = spa->spa_uberblock.ub_timestamp; 2068 2069 loss = spa->spa_last_ubsync_txg_ts - spa->spa_load_txg_ts; 2070 VERIFY(nvlist_add_uint64(spa->spa_load_info, 2071 ZPOOL_CONFIG_LOAD_TIME, spa->spa_load_txg_ts) == 0); 2072 VERIFY(nvlist_add_int64(spa->spa_load_info, 2073 ZPOOL_CONFIG_REWIND_TIME, loss) == 0); 2074 VERIFY(nvlist_add_uint64(spa->spa_load_info, 2075 ZPOOL_CONFIG_LOAD_DATA_ERRORS, sle.sle_data_count) == 0); 2076 } else { 2077 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg; 2078 } 2079 2080 if (error) { 2081 if (error != ENXIO && error != EIO) 2082 error = SET_ERROR(EIO); 2083 return (error); 2084 } 2085 2086 return (verify_ok ? 0 : EIO); 2087} 2088 2089/* 2090 * Find a value in the pool props object. 2091 */ 2092static void 2093spa_prop_find(spa_t *spa, zpool_prop_t prop, uint64_t *val) 2094{ 2095 (void) zap_lookup(spa->spa_meta_objset, spa->spa_pool_props_object, 2096 zpool_prop_to_name(prop), sizeof (uint64_t), 1, val); 2097} 2098 2099/* 2100 * Find a value in the pool directory object. 2101 */ 2102static int 2103spa_dir_prop(spa_t *spa, const char *name, uint64_t *val) 2104{ 2105 return (zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 2106 name, sizeof (uint64_t), 1, val)); 2107} 2108 2109static int 2110spa_vdev_err(vdev_t *vdev, vdev_aux_t aux, int err) 2111{ 2112 vdev_set_state(vdev, B_TRUE, VDEV_STATE_CANT_OPEN, aux); 2113 return (err); 2114} 2115 2116/* 2117 * Fix up config after a partly-completed split. This is done with the 2118 * ZPOOL_CONFIG_SPLIT nvlist. Both the splitting pool and the split-off 2119 * pool have that entry in their config, but only the splitting one contains 2120 * a list of all the guids of the vdevs that are being split off. 2121 * 2122 * This function determines what to do with that list: either rejoin 2123 * all the disks to the pool, or complete the splitting process. To attempt 2124 * the rejoin, each disk that is offlined is marked online again, and 2125 * we do a reopen() call. If the vdev label for every disk that was 2126 * marked online indicates it was successfully split off (VDEV_AUX_SPLIT_POOL) 2127 * then we call vdev_split() on each disk, and complete the split. 2128 * 2129 * Otherwise we leave the config alone, with all the vdevs in place in 2130 * the original pool. 2131 */ 2132static void 2133spa_try_repair(spa_t *spa, nvlist_t *config) 2134{ 2135 uint_t extracted; 2136 uint64_t *glist; 2137 uint_t i, gcount; 2138 nvlist_t *nvl; 2139 vdev_t **vd; 2140 boolean_t attempt_reopen; 2141 2142 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, &nvl) != 0) 2143 return; 2144 2145 /* check that the config is complete */ 2146 if (nvlist_lookup_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 2147 &glist, &gcount) != 0) 2148 return; 2149 2150 vd = kmem_zalloc(gcount * sizeof (vdev_t *), KM_SLEEP); 2151 2152 /* attempt to online all the vdevs & validate */ 2153 attempt_reopen = B_TRUE; 2154 for (i = 0; i < gcount; i++) { 2155 if (glist[i] == 0) /* vdev is hole */ 2156 continue; 2157 2158 vd[i] = spa_lookup_by_guid(spa, glist[i], B_FALSE); 2159 if (vd[i] == NULL) { 2160 /* 2161 * Don't bother attempting to reopen the disks; 2162 * just do the split. 2163 */ 2164 attempt_reopen = B_FALSE; 2165 } else { 2166 /* attempt to re-online it */ 2167 vd[i]->vdev_offline = B_FALSE; 2168 } 2169 } 2170 2171 if (attempt_reopen) { 2172 vdev_reopen(spa->spa_root_vdev); 2173 2174 /* check each device to see what state it's in */ 2175 for (extracted = 0, i = 0; i < gcount; i++) { 2176 if (vd[i] != NULL && 2177 vd[i]->vdev_stat.vs_aux != VDEV_AUX_SPLIT_POOL) 2178 break; 2179 ++extracted; 2180 } 2181 } 2182 2183 /* 2184 * If every disk has been moved to the new pool, or if we never 2185 * even attempted to look at them, then we split them off for 2186 * good. 2187 */ 2188 if (!attempt_reopen || gcount == extracted) { 2189 for (i = 0; i < gcount; i++) 2190 if (vd[i] != NULL) 2191 vdev_split(vd[i]); 2192 vdev_reopen(spa->spa_root_vdev); 2193 } 2194 2195 kmem_free(vd, gcount * sizeof (vdev_t *)); 2196} 2197 2198static int 2199spa_load(spa_t *spa, spa_load_state_t state, spa_import_type_t type, 2200 boolean_t mosconfig) 2201{ 2202 nvlist_t *config = spa->spa_config; 2203 char *ereport = FM_EREPORT_ZFS_POOL; 2204 char *comment; 2205 int error; 2206 uint64_t pool_guid; 2207 nvlist_t *nvl; 2208 2209 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, &pool_guid)) 2210 return (SET_ERROR(EINVAL)); 2211 2212 ASSERT(spa->spa_comment == NULL); 2213 if (nvlist_lookup_string(config, ZPOOL_CONFIG_COMMENT, &comment) == 0) 2214 spa->spa_comment = spa_strdup(comment); 2215 2216 /* 2217 * Versioning wasn't explicitly added to the label until later, so if 2218 * it's not present treat it as the initial version. 2219 */ 2220 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 2221 &spa->spa_ubsync.ub_version) != 0) 2222 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 2223 2224 (void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, 2225 &spa->spa_config_txg); 2226 2227 if ((state == SPA_LOAD_IMPORT || state == SPA_LOAD_TRYIMPORT) && 2228 spa_guid_exists(pool_guid, 0)) { 2229 error = SET_ERROR(EEXIST); 2230 } else { 2231 spa->spa_config_guid = pool_guid; 2232 2233 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_SPLIT, 2234 &nvl) == 0) { 2235 VERIFY(nvlist_dup(nvl, &spa->spa_config_splitting, 2236 KM_SLEEP) == 0); 2237 } 2238 2239 nvlist_free(spa->spa_load_info); 2240 spa->spa_load_info = fnvlist_alloc(); 2241 2242 gethrestime(&spa->spa_loaded_ts); 2243 error = spa_load_impl(spa, pool_guid, config, state, type, 2244 mosconfig, &ereport); 2245 } 2246 2247 /* 2248 * Don't count references from objsets that are already closed 2249 * and are making their way through the eviction process. 2250 */ 2251 spa_evicting_os_wait(spa); 2252 spa->spa_minref = refcount_count(&spa->spa_refcount); 2253 if (error) { 2254 if (error != EEXIST) { 2255 spa->spa_loaded_ts.tv_sec = 0; 2256 spa->spa_loaded_ts.tv_nsec = 0; 2257 } 2258 if (error != EBADF) { 2259 zfs_ereport_post(ereport, spa, NULL, NULL, 0, 0); 2260 } 2261 } 2262 spa->spa_load_state = error ? SPA_LOAD_ERROR : SPA_LOAD_NONE; 2263 spa->spa_ena = 0; 2264 2265 return (error); 2266} 2267 2268/* 2269 * Count the number of per-vdev ZAPs associated with all of the vdevs in the 2270 * vdev tree rooted in the given vd, and ensure that each ZAP is present in the 2271 * spa's per-vdev ZAP list. 2272 */ 2273static uint64_t 2274vdev_count_verify_zaps(vdev_t *vd) 2275{ 2276 spa_t *spa = vd->vdev_spa; 2277 uint64_t total = 0; 2278 if (vd->vdev_top_zap != 0) { 2279 total++; 2280 ASSERT0(zap_lookup_int(spa->spa_meta_objset, 2281 spa->spa_all_vdev_zaps, vd->vdev_top_zap)); 2282 } 2283 if (vd->vdev_leaf_zap != 0) { 2284 total++; 2285 ASSERT0(zap_lookup_int(spa->spa_meta_objset, 2286 spa->spa_all_vdev_zaps, vd->vdev_leaf_zap)); 2287 } 2288 2289 for (uint64_t i = 0; i < vd->vdev_children; i++) { 2290 total += vdev_count_verify_zaps(vd->vdev_child[i]); 2291 } 2292 2293 return (total); 2294} 2295 2296/* 2297 * Load an existing storage pool, using the pool's builtin spa_config as a 2298 * source of configuration information. 2299 */ 2300static int 2301spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config, 2302 spa_load_state_t state, spa_import_type_t type, boolean_t mosconfig, 2303 char **ereport) 2304{ 2305 int error = 0; 2306 nvlist_t *nvroot = NULL; 2307 nvlist_t *label; 2308 vdev_t *rvd; 2309 uberblock_t *ub = &spa->spa_uberblock; 2310 uint64_t children, config_cache_txg = spa->spa_config_txg; 2311 int orig_mode = spa->spa_mode; 2312 int parse; 2313 uint64_t obj; 2314 boolean_t missing_feat_write = B_FALSE; 2315 2316 /* 2317 * If this is an untrusted config, access the pool in read-only mode. 2318 * This prevents things like resilvering recently removed devices. 2319 */ 2320 if (!mosconfig) 2321 spa->spa_mode = FREAD; 2322 2323 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2324 2325 spa->spa_load_state = state; 2326 2327 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot)) 2328 return (SET_ERROR(EINVAL)); 2329 2330 parse = (type == SPA_IMPORT_EXISTING ? 2331 VDEV_ALLOC_LOAD : VDEV_ALLOC_SPLIT); 2332 2333 /* 2334 * Create "The Godfather" zio to hold all async IOs 2335 */ 2336 spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *), 2337 KM_SLEEP); 2338 for (int i = 0; i < max_ncpus; i++) { 2339 spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL, 2340 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | 2341 ZIO_FLAG_GODFATHER); 2342 } 2343 2344 /* 2345 * Parse the configuration into a vdev tree. We explicitly set the 2346 * value that will be returned by spa_version() since parsing the 2347 * configuration requires knowing the version number. 2348 */ 2349 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2350 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, parse); 2351 spa_config_exit(spa, SCL_ALL, FTAG); 2352 2353 if (error != 0) 2354 return (error); 2355 2356 ASSERT(spa->spa_root_vdev == rvd); 2357 ASSERT3U(spa->spa_min_ashift, >=, SPA_MINBLOCKSHIFT); 2358 ASSERT3U(spa->spa_max_ashift, <=, SPA_MAXBLOCKSHIFT); 2359 2360 if (type != SPA_IMPORT_ASSEMBLE) { 2361 ASSERT(spa_guid(spa) == pool_guid); 2362 } 2363 2364 /* 2365 * Try to open all vdevs, loading each label in the process. 2366 */ 2367 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2368 error = vdev_open(rvd); 2369 spa_config_exit(spa, SCL_ALL, FTAG); 2370 if (error != 0) 2371 return (error); 2372 2373 /* 2374 * We need to validate the vdev labels against the configuration that 2375 * we have in hand, which is dependent on the setting of mosconfig. If 2376 * mosconfig is true then we're validating the vdev labels based on 2377 * that config. Otherwise, we're validating against the cached config 2378 * (zpool.cache) that was read when we loaded the zfs module, and then 2379 * later we will recursively call spa_load() and validate against 2380 * the vdev config. 2381 * 2382 * If we're assembling a new pool that's been split off from an 2383 * existing pool, the labels haven't yet been updated so we skip 2384 * validation for now. 2385 */ 2386 if (type != SPA_IMPORT_ASSEMBLE) { 2387 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2388 error = vdev_validate(rvd, mosconfig); 2389 spa_config_exit(spa, SCL_ALL, FTAG); 2390 2391 if (error != 0) 2392 return (error); 2393 2394 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2395 return (SET_ERROR(ENXIO)); 2396 } 2397 2398 /* 2399 * Find the best uberblock. 2400 */ 2401 vdev_uberblock_load(rvd, ub, &label); 2402 2403 /* 2404 * If we weren't able to find a single valid uberblock, return failure. 2405 */ 2406 if (ub->ub_txg == 0) { 2407 nvlist_free(label); 2408 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, ENXIO)); 2409 } 2410 2411 /* 2412 * If the pool has an unsupported version we can't open it. 2413 */ 2414 if (!SPA_VERSION_IS_SUPPORTED(ub->ub_version)) { 2415 nvlist_free(label); 2416 return (spa_vdev_err(rvd, VDEV_AUX_VERSION_NEWER, ENOTSUP)); 2417 } 2418 2419 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2420 nvlist_t *features; 2421 2422 /* 2423 * If we weren't able to find what's necessary for reading the 2424 * MOS in the label, return failure. 2425 */ 2426 if (label == NULL || nvlist_lookup_nvlist(label, 2427 ZPOOL_CONFIG_FEATURES_FOR_READ, &features) != 0) { 2428 nvlist_free(label); 2429 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2430 ENXIO)); 2431 } 2432 2433 /* 2434 * Update our in-core representation with the definitive values 2435 * from the label. 2436 */ 2437 nvlist_free(spa->spa_label_features); 2438 VERIFY(nvlist_dup(features, &spa->spa_label_features, 0) == 0); 2439 } 2440 2441 nvlist_free(label); 2442 2443 /* 2444 * Look through entries in the label nvlist's features_for_read. If 2445 * there is a feature listed there which we don't understand then we 2446 * cannot open a pool. 2447 */ 2448 if (ub->ub_version >= SPA_VERSION_FEATURES) { 2449 nvlist_t *unsup_feat; 2450 2451 VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) == 2452 0); 2453 2454 for (nvpair_t *nvp = nvlist_next_nvpair(spa->spa_label_features, 2455 NULL); nvp != NULL; 2456 nvp = nvlist_next_nvpair(spa->spa_label_features, nvp)) { 2457 if (!zfeature_is_supported(nvpair_name(nvp))) { 2458 VERIFY(nvlist_add_string(unsup_feat, 2459 nvpair_name(nvp), "") == 0); 2460 } 2461 } 2462 2463 if (!nvlist_empty(unsup_feat)) { 2464 VERIFY(nvlist_add_nvlist(spa->spa_load_info, 2465 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0); 2466 nvlist_free(unsup_feat); 2467 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2468 ENOTSUP)); 2469 } 2470 2471 nvlist_free(unsup_feat); 2472 } 2473 2474 /* 2475 * If the vdev guid sum doesn't match the uberblock, we have an 2476 * incomplete configuration. We first check to see if the pool 2477 * is aware of the complete config (i.e ZPOOL_CONFIG_VDEV_CHILDREN). 2478 * If it is, defer the vdev_guid_sum check till later so we 2479 * can handle missing vdevs. 2480 */ 2481 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VDEV_CHILDREN, 2482 &children) != 0 && mosconfig && type != SPA_IMPORT_ASSEMBLE && 2483 rvd->vdev_guid_sum != ub->ub_guid_sum) 2484 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, ENXIO)); 2485 2486 if (type != SPA_IMPORT_ASSEMBLE && spa->spa_config_splitting) { 2487 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2488 spa_try_repair(spa, config); 2489 spa_config_exit(spa, SCL_ALL, FTAG); 2490 nvlist_free(spa->spa_config_splitting); 2491 spa->spa_config_splitting = NULL; 2492 } 2493 2494 /* 2495 * Initialize internal SPA structures. 2496 */ 2497 spa->spa_state = POOL_STATE_ACTIVE; 2498 spa->spa_ubsync = spa->spa_uberblock; 2499 spa->spa_verify_min_txg = spa->spa_extreme_rewind ? 2500 TXG_INITIAL - 1 : spa_last_synced_txg(spa) - TXG_DEFER_SIZE - 1; 2501 spa->spa_first_txg = spa->spa_last_ubsync_txg ? 2502 spa->spa_last_ubsync_txg : spa_last_synced_txg(spa) + 1; 2503 spa->spa_claim_max_txg = spa->spa_first_txg; 2504 spa->spa_prev_software_version = ub->ub_software_version; 2505 2506 error = dsl_pool_init(spa, spa->spa_first_txg, &spa->spa_dsl_pool); 2507 if (error) 2508 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2509 spa->spa_meta_objset = spa->spa_dsl_pool->dp_meta_objset; 2510 2511 if (spa_dir_prop(spa, DMU_POOL_CONFIG, &spa->spa_config_object) != 0) 2512 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2513 2514 if (spa_version(spa) >= SPA_VERSION_FEATURES) { 2515 boolean_t missing_feat_read = B_FALSE; 2516 nvlist_t *unsup_feat, *enabled_feat; 2517 2518 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ, 2519 &spa->spa_feat_for_read_obj) != 0) { 2520 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2521 } 2522 2523 if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_WRITE, 2524 &spa->spa_feat_for_write_obj) != 0) { 2525 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2526 } 2527 2528 if (spa_dir_prop(spa, DMU_POOL_FEATURE_DESCRIPTIONS, 2529 &spa->spa_feat_desc_obj) != 0) { 2530 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2531 } 2532 2533 enabled_feat = fnvlist_alloc(); 2534 unsup_feat = fnvlist_alloc(); 2535 2536 if (!spa_features_check(spa, B_FALSE, 2537 unsup_feat, enabled_feat)) 2538 missing_feat_read = B_TRUE; 2539 2540 if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) { 2541 if (!spa_features_check(spa, B_TRUE, 2542 unsup_feat, enabled_feat)) { 2543 missing_feat_write = B_TRUE; 2544 } 2545 } 2546 2547 fnvlist_add_nvlist(spa->spa_load_info, 2548 ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat); 2549 2550 if (!nvlist_empty(unsup_feat)) { 2551 fnvlist_add_nvlist(spa->spa_load_info, 2552 ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat); 2553 } 2554 2555 fnvlist_free(enabled_feat); 2556 fnvlist_free(unsup_feat); 2557 2558 if (!missing_feat_read) { 2559 fnvlist_add_boolean(spa->spa_load_info, 2560 ZPOOL_CONFIG_CAN_RDONLY); 2561 } 2562 2563 /* 2564 * If the state is SPA_LOAD_TRYIMPORT, our objective is 2565 * twofold: to determine whether the pool is available for 2566 * import in read-write mode and (if it is not) whether the 2567 * pool is available for import in read-only mode. If the pool 2568 * is available for import in read-write mode, it is displayed 2569 * as available in userland; if it is not available for import 2570 * in read-only mode, it is displayed as unavailable in 2571 * userland. If the pool is available for import in read-only 2572 * mode but not read-write mode, it is displayed as unavailable 2573 * in userland with a special note that the pool is actually 2574 * available for open in read-only mode. 2575 * 2576 * As a result, if the state is SPA_LOAD_TRYIMPORT and we are 2577 * missing a feature for write, we must first determine whether 2578 * the pool can be opened read-only before returning to 2579 * userland in order to know whether to display the 2580 * abovementioned note. 2581 */ 2582 if (missing_feat_read || (missing_feat_write && 2583 spa_writeable(spa))) { 2584 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, 2585 ENOTSUP)); 2586 } 2587 2588 /* 2589 * Load refcounts for ZFS features from disk into an in-memory 2590 * cache during SPA initialization. 2591 */ 2592 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 2593 uint64_t refcount; 2594 2595 error = feature_get_refcount_from_disk(spa, 2596 &spa_feature_table[i], &refcount); 2597 if (error == 0) { 2598 spa->spa_feat_refcount_cache[i] = refcount; 2599 } else if (error == ENOTSUP) { 2600 spa->spa_feat_refcount_cache[i] = 2601 SPA_FEATURE_DISABLED; 2602 } else { 2603 return (spa_vdev_err(rvd, 2604 VDEV_AUX_CORRUPT_DATA, EIO)); 2605 } 2606 } 2607 } 2608 2609 if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) { 2610 if (spa_dir_prop(spa, DMU_POOL_FEATURE_ENABLED_TXG, 2611 &spa->spa_feat_enabled_txg_obj) != 0) 2612 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2613 } 2614 2615 spa->spa_is_initializing = B_TRUE; 2616 error = dsl_pool_open(spa->spa_dsl_pool); 2617 spa->spa_is_initializing = B_FALSE; 2618 if (error != 0) 2619 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2620 2621 if (!mosconfig) { 2622 uint64_t hostid; 2623 nvlist_t *policy = NULL, *nvconfig; 2624 2625 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2626 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2627 2628 if (!spa_is_root(spa) && nvlist_lookup_uint64(nvconfig, 2629 ZPOOL_CONFIG_HOSTID, &hostid) == 0) { 2630 char *hostname; 2631 unsigned long myhostid = 0; 2632 2633 VERIFY(nvlist_lookup_string(nvconfig, 2634 ZPOOL_CONFIG_HOSTNAME, &hostname) == 0); 2635 2636#ifdef _KERNEL 2637 myhostid = zone_get_hostid(NULL); 2638#else /* _KERNEL */ 2639 /* 2640 * We're emulating the system's hostid in userland, so 2641 * we can't use zone_get_hostid(). 2642 */ 2643 (void) ddi_strtoul(hw_serial, NULL, 10, &myhostid); 2644#endif /* _KERNEL */ 2645 if (check_hostid && hostid != 0 && myhostid != 0 && 2646 hostid != myhostid) { 2647 nvlist_free(nvconfig); 2648 cmn_err(CE_WARN, "pool '%s' could not be " 2649 "loaded as it was last accessed by " 2650 "another system (host: %s hostid: 0x%lx). " 2651 "See: http://illumos.org/msg/ZFS-8000-EY", 2652 spa_name(spa), hostname, 2653 (unsigned long)hostid); 2654 return (SET_ERROR(EBADF)); 2655 } 2656 } 2657 if (nvlist_lookup_nvlist(spa->spa_config, 2658 ZPOOL_REWIND_POLICY, &policy) == 0) 2659 VERIFY(nvlist_add_nvlist(nvconfig, 2660 ZPOOL_REWIND_POLICY, policy) == 0); 2661 2662 spa_config_set(spa, nvconfig); 2663 spa_unload(spa); 2664 spa_deactivate(spa); 2665 spa_activate(spa, orig_mode); 2666 2667 return (spa_load(spa, state, SPA_IMPORT_EXISTING, B_TRUE)); 2668 } 2669 2670 /* Grab the secret checksum salt from the MOS. */ 2671 error = zap_lookup(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 2672 DMU_POOL_CHECKSUM_SALT, 1, 2673 sizeof (spa->spa_cksum_salt.zcs_bytes), 2674 spa->spa_cksum_salt.zcs_bytes); 2675 if (error == ENOENT) { 2676 /* Generate a new salt for subsequent use */ 2677 (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes, 2678 sizeof (spa->spa_cksum_salt.zcs_bytes)); 2679 } else if (error != 0) { 2680 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2681 } 2682 2683 if (spa_dir_prop(spa, DMU_POOL_SYNC_BPOBJ, &obj) != 0) 2684 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2685 error = bpobj_open(&spa->spa_deferred_bpobj, spa->spa_meta_objset, obj); 2686 if (error != 0) 2687 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2688 2689 /* 2690 * Load the bit that tells us to use the new accounting function 2691 * (raid-z deflation). If we have an older pool, this will not 2692 * be present. 2693 */ 2694 error = spa_dir_prop(spa, DMU_POOL_DEFLATE, &spa->spa_deflate); 2695 if (error != 0 && error != ENOENT) 2696 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2697 2698 error = spa_dir_prop(spa, DMU_POOL_CREATION_VERSION, 2699 &spa->spa_creation_version); 2700 if (error != 0 && error != ENOENT) 2701 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2702 2703 /* 2704 * Load the persistent error log. If we have an older pool, this will 2705 * not be present. 2706 */ 2707 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_LAST, &spa->spa_errlog_last); 2708 if (error != 0 && error != ENOENT) 2709 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2710 2711 error = spa_dir_prop(spa, DMU_POOL_ERRLOG_SCRUB, 2712 &spa->spa_errlog_scrub); 2713 if (error != 0 && error != ENOENT) 2714 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2715 2716 /* 2717 * Load the history object. If we have an older pool, this 2718 * will not be present. 2719 */ 2720 error = spa_dir_prop(spa, DMU_POOL_HISTORY, &spa->spa_history); 2721 if (error != 0 && error != ENOENT) 2722 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2723 2724 /* 2725 * Load the per-vdev ZAP map. If we have an older pool, this will not 2726 * be present; in this case, defer its creation to a later time to 2727 * avoid dirtying the MOS this early / out of sync context. See 2728 * spa_sync_config_object. 2729 */ 2730 2731 /* The sentinel is only available in the MOS config. */ 2732 nvlist_t *mos_config; 2733 if (load_nvlist(spa, spa->spa_config_object, &mos_config) != 0) 2734 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2735 2736 error = spa_dir_prop(spa, DMU_POOL_VDEV_ZAP_MAP, 2737 &spa->spa_all_vdev_zaps); 2738 2739 if (error == ENOENT) { 2740 VERIFY(!nvlist_exists(mos_config, 2741 ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)); 2742 spa->spa_avz_action = AVZ_ACTION_INITIALIZE; 2743 ASSERT0(vdev_count_verify_zaps(spa->spa_root_vdev)); 2744 } else if (error != 0) { 2745 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2746 } else if (!nvlist_exists(mos_config, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)) { 2747 /* 2748 * An older version of ZFS overwrote the sentinel value, so 2749 * we have orphaned per-vdev ZAPs in the MOS. Defer their 2750 * destruction to later; see spa_sync_config_object. 2751 */ 2752 spa->spa_avz_action = AVZ_ACTION_DESTROY; 2753 /* 2754 * We're assuming that no vdevs have had their ZAPs created 2755 * before this. Better be sure of it. 2756 */ 2757 ASSERT0(vdev_count_verify_zaps(spa->spa_root_vdev)); 2758 } 2759 nvlist_free(mos_config); 2760 2761 /* 2762 * If we're assembling the pool from the split-off vdevs of 2763 * an existing pool, we don't want to attach the spares & cache 2764 * devices. 2765 */ 2766 2767 /* 2768 * Load any hot spares for this pool. 2769 */ 2770 error = spa_dir_prop(spa, DMU_POOL_SPARES, &spa->spa_spares.sav_object); 2771 if (error != 0 && error != ENOENT) 2772 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2773 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2774 ASSERT(spa_version(spa) >= SPA_VERSION_SPARES); 2775 if (load_nvlist(spa, spa->spa_spares.sav_object, 2776 &spa->spa_spares.sav_config) != 0) 2777 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2778 2779 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2780 spa_load_spares(spa); 2781 spa_config_exit(spa, SCL_ALL, FTAG); 2782 } else if (error == 0) { 2783 spa->spa_spares.sav_sync = B_TRUE; 2784 } 2785 2786 /* 2787 * Load any level 2 ARC devices for this pool. 2788 */ 2789 error = spa_dir_prop(spa, DMU_POOL_L2CACHE, 2790 &spa->spa_l2cache.sav_object); 2791 if (error != 0 && error != ENOENT) 2792 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2793 if (error == 0 && type != SPA_IMPORT_ASSEMBLE) { 2794 ASSERT(spa_version(spa) >= SPA_VERSION_L2CACHE); 2795 if (load_nvlist(spa, spa->spa_l2cache.sav_object, 2796 &spa->spa_l2cache.sav_config) != 0) 2797 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2798 2799 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2800 spa_load_l2cache(spa); 2801 spa_config_exit(spa, SCL_ALL, FTAG); 2802 } else if (error == 0) { 2803 spa->spa_l2cache.sav_sync = B_TRUE; 2804 } 2805 2806 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 2807 2808 error = spa_dir_prop(spa, DMU_POOL_PROPS, &spa->spa_pool_props_object); 2809 if (error && error != ENOENT) 2810 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2811 2812 if (error == 0) { 2813 uint64_t autoreplace; 2814 2815 spa_prop_find(spa, ZPOOL_PROP_BOOTFS, &spa->spa_bootfs); 2816 spa_prop_find(spa, ZPOOL_PROP_AUTOREPLACE, &autoreplace); 2817 spa_prop_find(spa, ZPOOL_PROP_DELEGATION, &spa->spa_delegation); 2818 spa_prop_find(spa, ZPOOL_PROP_FAILUREMODE, &spa->spa_failmode); 2819 spa_prop_find(spa, ZPOOL_PROP_AUTOEXPAND, &spa->spa_autoexpand); 2820 spa_prop_find(spa, ZPOOL_PROP_DEDUPDITTO, 2821 &spa->spa_dedup_ditto); 2822 2823 spa->spa_autoreplace = (autoreplace != 0); 2824 } 2825 2826 /* 2827 * If the 'autoreplace' property is set, then post a resource notifying 2828 * the ZFS DE that it should not issue any faults for unopenable 2829 * devices. We also iterate over the vdevs, and post a sysevent for any 2830 * unopenable vdevs so that the normal autoreplace handler can take 2831 * over. 2832 */ 2833 if (spa->spa_autoreplace && state != SPA_LOAD_TRYIMPORT) { 2834 spa_check_removed(spa->spa_root_vdev); 2835 /* 2836 * For the import case, this is done in spa_import(), because 2837 * at this point we're using the spare definitions from 2838 * the MOS config, not necessarily from the userland config. 2839 */ 2840 if (state != SPA_LOAD_IMPORT) { 2841 spa_aux_check_removed(&spa->spa_spares); 2842 spa_aux_check_removed(&spa->spa_l2cache); 2843 } 2844 } 2845 2846 /* 2847 * Load the vdev state for all toplevel vdevs. 2848 */ 2849 vdev_load(rvd); 2850 2851 /* 2852 * Propagate the leaf DTLs we just loaded all the way up the tree. 2853 */ 2854 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 2855 vdev_dtl_reassess(rvd, 0, 0, B_FALSE); 2856 spa_config_exit(spa, SCL_ALL, FTAG); 2857 2858 /* 2859 * Load the DDTs (dedup tables). 2860 */ 2861 error = ddt_load(spa); 2862 if (error != 0) 2863 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2864 2865 spa_update_dspace(spa); 2866 2867 /* 2868 * Validate the config, using the MOS config to fill in any 2869 * information which might be missing. If we fail to validate 2870 * the config then declare the pool unfit for use. If we're 2871 * assembling a pool from a split, the log is not transferred 2872 * over. 2873 */ 2874 if (type != SPA_IMPORT_ASSEMBLE) { 2875 nvlist_t *nvconfig; 2876 2877 if (load_nvlist(spa, spa->spa_config_object, &nvconfig) != 0) 2878 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO)); 2879 2880 if (!spa_config_valid(spa, nvconfig)) { 2881 nvlist_free(nvconfig); 2882 return (spa_vdev_err(rvd, VDEV_AUX_BAD_GUID_SUM, 2883 ENXIO)); 2884 } 2885 nvlist_free(nvconfig); 2886 2887 /* 2888 * Now that we've validated the config, check the state of the 2889 * root vdev. If it can't be opened, it indicates one or 2890 * more toplevel vdevs are faulted. 2891 */ 2892 if (rvd->vdev_state <= VDEV_STATE_CANT_OPEN) 2893 return (SET_ERROR(ENXIO)); 2894 2895 if (spa_writeable(spa) && spa_check_logs(spa)) { 2896 *ereport = FM_EREPORT_ZFS_LOG_REPLAY; 2897 return (spa_vdev_err(rvd, VDEV_AUX_BAD_LOG, ENXIO)); 2898 } 2899 } 2900 2901 if (missing_feat_write) { 2902 ASSERT(state == SPA_LOAD_TRYIMPORT); 2903 2904 /* 2905 * At this point, we know that we can open the pool in 2906 * read-only mode but not read-write mode. We now have enough 2907 * information and can return to userland. 2908 */ 2909 return (spa_vdev_err(rvd, VDEV_AUX_UNSUP_FEAT, ENOTSUP)); 2910 } 2911 2912 /* 2913 * We've successfully opened the pool, verify that we're ready 2914 * to start pushing transactions. 2915 */ 2916 if (state != SPA_LOAD_TRYIMPORT) { 2917 if (error = spa_load_verify(spa)) 2918 return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, 2919 error)); 2920 } 2921 2922 if (spa_writeable(spa) && (state == SPA_LOAD_RECOVER || 2923 spa->spa_load_max_txg == UINT64_MAX)) { 2924 dmu_tx_t *tx; 2925 int need_update = B_FALSE; 2926 dsl_pool_t *dp = spa_get_dsl(spa); 2927 2928 ASSERT(state != SPA_LOAD_TRYIMPORT); 2929 2930 /* 2931 * Claim log blocks that haven't been committed yet. 2932 * This must all happen in a single txg. 2933 * Note: spa_claim_max_txg is updated by spa_claim_notify(), 2934 * invoked from zil_claim_log_block()'s i/o done callback. 2935 * Price of rollback is that we abandon the log. 2936 */ 2937 spa->spa_claiming = B_TRUE; 2938 2939 tx = dmu_tx_create_assigned(dp, spa_first_txg(spa)); 2940 (void) dmu_objset_find_dp(dp, dp->dp_root_dir_obj, 2941 zil_claim, tx, DS_FIND_CHILDREN); 2942 dmu_tx_commit(tx); 2943 2944 spa->spa_claiming = B_FALSE; 2945 2946 spa_set_log_state(spa, SPA_LOG_GOOD); 2947 spa->spa_sync_on = B_TRUE; 2948 txg_sync_start(spa->spa_dsl_pool); 2949 2950 /* 2951 * Wait for all claims to sync. We sync up to the highest 2952 * claimed log block birth time so that claimed log blocks 2953 * don't appear to be from the future. spa_claim_max_txg 2954 * will have been set for us by either zil_check_log_chain() 2955 * (invoked from spa_check_logs()) or zil_claim() above. 2956 */ 2957 txg_wait_synced(spa->spa_dsl_pool, spa->spa_claim_max_txg); 2958 2959 /* 2960 * If the config cache is stale, or we have uninitialized 2961 * metaslabs (see spa_vdev_add()), then update the config. 2962 * 2963 * If this is a verbatim import, trust the current 2964 * in-core spa_config and update the disk labels. 2965 */ 2966 if (config_cache_txg != spa->spa_config_txg || 2967 state == SPA_LOAD_IMPORT || 2968 state == SPA_LOAD_RECOVER || 2969 (spa->spa_import_flags & ZFS_IMPORT_VERBATIM)) 2970 need_update = B_TRUE; 2971 2972 for (int c = 0; c < rvd->vdev_children; c++) 2973 if (rvd->vdev_child[c]->vdev_ms_array == 0) 2974 need_update = B_TRUE; 2975 2976 /* 2977 * Update the config cache asychronously in case we're the 2978 * root pool, in which case the config cache isn't writable yet. 2979 */ 2980 if (need_update) 2981 spa_async_request(spa, SPA_ASYNC_CONFIG_UPDATE); 2982 2983 /* 2984 * Check all DTLs to see if anything needs resilvering. 2985 */ 2986 if (!dsl_scan_resilvering(spa->spa_dsl_pool) && 2987 vdev_resilver_needed(rvd, NULL, NULL)) 2988 spa_async_request(spa, SPA_ASYNC_RESILVER); 2989 2990 /* 2991 * Log the fact that we booted up (so that we can detect if 2992 * we rebooted in the middle of an operation). 2993 */ 2994 spa_history_log_version(spa, "open"); 2995 2996 /* 2997 * Delete any inconsistent datasets. 2998 */ 2999 (void) dmu_objset_find(spa_name(spa), 3000 dsl_destroy_inconsistent, NULL, DS_FIND_CHILDREN); 3001 3002 /* 3003 * Clean up any stale temporary dataset userrefs. 3004 */ 3005 dsl_pool_clean_tmp_userrefs(spa->spa_dsl_pool); 3006 } 3007 3008 return (0); 3009} 3010 3011static int 3012spa_load_retry(spa_t *spa, spa_load_state_t state, int mosconfig) 3013{ 3014 int mode = spa->spa_mode; 3015 3016 spa_unload(spa); 3017 spa_deactivate(spa); 3018 3019 spa->spa_load_max_txg = spa->spa_uberblock.ub_txg - 1; 3020 3021 spa_activate(spa, mode); 3022 spa_async_suspend(spa); 3023 3024 return (spa_load(spa, state, SPA_IMPORT_EXISTING, mosconfig)); 3025} 3026 3027/* 3028 * If spa_load() fails this function will try loading prior txg's. If 3029 * 'state' is SPA_LOAD_RECOVER and one of these loads succeeds the pool 3030 * will be rewound to that txg. If 'state' is not SPA_LOAD_RECOVER this 3031 * function will not rewind the pool and will return the same error as 3032 * spa_load(). 3033 */ 3034static int 3035spa_load_best(spa_t *spa, spa_load_state_t state, int mosconfig, 3036 uint64_t max_request, int rewind_flags) 3037{ 3038 nvlist_t *loadinfo = NULL; 3039 nvlist_t *config = NULL; 3040 int load_error, rewind_error; 3041 uint64_t safe_rewind_txg; 3042 uint64_t min_txg; 3043 3044 if (spa->spa_load_txg && state == SPA_LOAD_RECOVER) { 3045 spa->spa_load_max_txg = spa->spa_load_txg; 3046 spa_set_log_state(spa, SPA_LOG_CLEAR); 3047 } else { 3048 spa->spa_load_max_txg = max_request; 3049 if (max_request != UINT64_MAX) 3050 spa->spa_extreme_rewind = B_TRUE; 3051 } 3052 3053 load_error = rewind_error = spa_load(spa, state, SPA_IMPORT_EXISTING, 3054 mosconfig); 3055 if (load_error == 0) 3056 return (0); 3057 3058 if (spa->spa_root_vdev != NULL) 3059 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 3060 3061 spa->spa_last_ubsync_txg = spa->spa_uberblock.ub_txg; 3062 spa->spa_last_ubsync_txg_ts = spa->spa_uberblock.ub_timestamp; 3063 3064 if (rewind_flags & ZPOOL_NEVER_REWIND) { 3065 nvlist_free(config); 3066 return (load_error); 3067 } 3068 3069 if (state == SPA_LOAD_RECOVER) { 3070 /* Price of rolling back is discarding txgs, including log */ 3071 spa_set_log_state(spa, SPA_LOG_CLEAR); 3072 } else { 3073 /* 3074 * If we aren't rolling back save the load info from our first 3075 * import attempt so that we can restore it after attempting 3076 * to rewind. 3077 */ 3078 loadinfo = spa->spa_load_info; 3079 spa->spa_load_info = fnvlist_alloc(); 3080 } 3081 3082 spa->spa_load_max_txg = spa->spa_last_ubsync_txg; 3083 safe_rewind_txg = spa->spa_last_ubsync_txg - TXG_DEFER_SIZE; 3084 min_txg = (rewind_flags & ZPOOL_EXTREME_REWIND) ? 3085 TXG_INITIAL : safe_rewind_txg; 3086 3087 /* 3088 * Continue as long as we're finding errors, we're still within 3089 * the acceptable rewind range, and we're still finding uberblocks 3090 */ 3091 while (rewind_error && spa->spa_uberblock.ub_txg >= min_txg && 3092 spa->spa_uberblock.ub_txg <= spa->spa_load_max_txg) { 3093 if (spa->spa_load_max_txg < safe_rewind_txg) 3094 spa->spa_extreme_rewind = B_TRUE; 3095 rewind_error = spa_load_retry(spa, state, mosconfig); 3096 } 3097 3098 spa->spa_extreme_rewind = B_FALSE; 3099 spa->spa_load_max_txg = UINT64_MAX; 3100 3101 if (config && (rewind_error || state != SPA_LOAD_RECOVER)) 3102 spa_config_set(spa, config); 3103 3104 if (state == SPA_LOAD_RECOVER) { 3105 ASSERT3P(loadinfo, ==, NULL); 3106 return (rewind_error); 3107 } else { 3108 /* Store the rewind info as part of the initial load info */ 3109 fnvlist_add_nvlist(loadinfo, ZPOOL_CONFIG_REWIND_INFO, 3110 spa->spa_load_info); 3111 3112 /* Restore the initial load info */ 3113 fnvlist_free(spa->spa_load_info); 3114 spa->spa_load_info = loadinfo; 3115 3116 return (load_error); 3117 } 3118} 3119 3120/* 3121 * Pool Open/Import 3122 * 3123 * The import case is identical to an open except that the configuration is sent 3124 * down from userland, instead of grabbed from the configuration cache. For the 3125 * case of an open, the pool configuration will exist in the 3126 * POOL_STATE_UNINITIALIZED state. 3127 * 3128 * The stats information (gen/count/ustats) is used to gather vdev statistics at 3129 * the same time open the pool, without having to keep around the spa_t in some 3130 * ambiguous state. 3131 */ 3132static int 3133spa_open_common(const char *pool, spa_t **spapp, void *tag, nvlist_t *nvpolicy, 3134 nvlist_t **config) 3135{ 3136 spa_t *spa; 3137 spa_load_state_t state = SPA_LOAD_OPEN; 3138 int error; 3139 int locked = B_FALSE; 3140 int firstopen = B_FALSE; 3141 3142 *spapp = NULL; 3143 3144 /* 3145 * As disgusting as this is, we need to support recursive calls to this 3146 * function because dsl_dir_open() is called during spa_load(), and ends 3147 * up calling spa_open() again. The real fix is to figure out how to 3148 * avoid dsl_dir_open() calling this in the first place. 3149 */ 3150 if (mutex_owner(&spa_namespace_lock) != curthread) { 3151 mutex_enter(&spa_namespace_lock); 3152 locked = B_TRUE; 3153 } 3154 3155 if ((spa = spa_lookup(pool)) == NULL) { 3156 if (locked) 3157 mutex_exit(&spa_namespace_lock); 3158 return (SET_ERROR(ENOENT)); 3159 } 3160 3161 if (spa->spa_state == POOL_STATE_UNINITIALIZED) { 3162 zpool_rewind_policy_t policy; 3163 3164 firstopen = B_TRUE; 3165 3166 zpool_get_rewind_policy(nvpolicy ? nvpolicy : spa->spa_config, 3167 &policy); 3168 if (policy.zrp_request & ZPOOL_DO_REWIND) 3169 state = SPA_LOAD_RECOVER; 3170 3171 spa_activate(spa, spa_mode_global); 3172 3173 if (state != SPA_LOAD_RECOVER) 3174 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 3175 3176 error = spa_load_best(spa, state, B_FALSE, policy.zrp_txg, 3177 policy.zrp_request); 3178 3179 if (error == EBADF) { 3180 /* 3181 * If vdev_validate() returns failure (indicated by 3182 * EBADF), it indicates that one of the vdevs indicates 3183 * that the pool has been exported or destroyed. If 3184 * this is the case, the config cache is out of sync and 3185 * we should remove the pool from the namespace. 3186 */ 3187 spa_unload(spa); 3188 spa_deactivate(spa); 3189 spa_config_sync(spa, B_TRUE, B_TRUE); 3190 spa_remove(spa); 3191 if (locked) 3192 mutex_exit(&spa_namespace_lock); 3193 return (SET_ERROR(ENOENT)); 3194 } 3195 3196 if (error) { 3197 /* 3198 * We can't open the pool, but we still have useful 3199 * information: the state of each vdev after the 3200 * attempted vdev_open(). Return this to the user. 3201 */ 3202 if (config != NULL && spa->spa_config) { 3203 VERIFY(nvlist_dup(spa->spa_config, config, 3204 KM_SLEEP) == 0); 3205 VERIFY(nvlist_add_nvlist(*config, 3206 ZPOOL_CONFIG_LOAD_INFO, 3207 spa->spa_load_info) == 0); 3208 } 3209 spa_unload(spa); 3210 spa_deactivate(spa); 3211 spa->spa_last_open_failed = error; 3212 if (locked) 3213 mutex_exit(&spa_namespace_lock); 3214 *spapp = NULL; 3215 return (error); 3216 } 3217 } 3218 3219 spa_open_ref(spa, tag); 3220 3221 if (config != NULL) 3222 *config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 3223 3224 /* 3225 * If we've recovered the pool, pass back any information we 3226 * gathered while doing the load. 3227 */ 3228 if (state == SPA_LOAD_RECOVER) { 3229 VERIFY(nvlist_add_nvlist(*config, ZPOOL_CONFIG_LOAD_INFO, 3230 spa->spa_load_info) == 0); 3231 } 3232 3233 if (locked) { 3234 spa->spa_last_open_failed = 0; 3235 spa->spa_last_ubsync_txg = 0; 3236 spa->spa_load_txg = 0; 3237 mutex_exit(&spa_namespace_lock); 3238#ifdef __FreeBSD__ 3239#ifdef _KERNEL 3240 if (firstopen) 3241 zvol_create_minors(spa->spa_name); 3242#endif 3243#endif 3244 } 3245 3246 *spapp = spa; 3247 3248 return (0); 3249} 3250 3251int 3252spa_open_rewind(const char *name, spa_t **spapp, void *tag, nvlist_t *policy, 3253 nvlist_t **config) 3254{ 3255 return (spa_open_common(name, spapp, tag, policy, config)); 3256} 3257 3258int 3259spa_open(const char *name, spa_t **spapp, void *tag) 3260{ 3261 return (spa_open_common(name, spapp, tag, NULL, NULL)); 3262} 3263 3264/* 3265 * Lookup the given spa_t, incrementing the inject count in the process, 3266 * preventing it from being exported or destroyed. 3267 */ 3268spa_t * 3269spa_inject_addref(char *name) 3270{ 3271 spa_t *spa; 3272 3273 mutex_enter(&spa_namespace_lock); 3274 if ((spa = spa_lookup(name)) == NULL) { 3275 mutex_exit(&spa_namespace_lock); 3276 return (NULL); 3277 } 3278 spa->spa_inject_ref++; 3279 mutex_exit(&spa_namespace_lock); 3280 3281 return (spa); 3282} 3283 3284void 3285spa_inject_delref(spa_t *spa) 3286{ 3287 mutex_enter(&spa_namespace_lock); 3288 spa->spa_inject_ref--; 3289 mutex_exit(&spa_namespace_lock); 3290} 3291 3292/* 3293 * Add spares device information to the nvlist. 3294 */ 3295static void 3296spa_add_spares(spa_t *spa, nvlist_t *config) 3297{ 3298 nvlist_t **spares; 3299 uint_t i, nspares; 3300 nvlist_t *nvroot; 3301 uint64_t guid; 3302 vdev_stat_t *vs; 3303 uint_t vsc; 3304 uint64_t pool; 3305 3306 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3307 3308 if (spa->spa_spares.sav_count == 0) 3309 return; 3310 3311 VERIFY(nvlist_lookup_nvlist(config, 3312 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3313 VERIFY(nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 3314 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3315 if (nspares != 0) { 3316 VERIFY(nvlist_add_nvlist_array(nvroot, 3317 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3318 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3319 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0); 3320 3321 /* 3322 * Go through and find any spares which have since been 3323 * repurposed as an active spare. If this is the case, update 3324 * their status appropriately. 3325 */ 3326 for (i = 0; i < nspares; i++) { 3327 VERIFY(nvlist_lookup_uint64(spares[i], 3328 ZPOOL_CONFIG_GUID, &guid) == 0); 3329 if (spa_spare_exists(guid, &pool, NULL) && 3330 pool != 0ULL) { 3331 VERIFY(nvlist_lookup_uint64_array( 3332 spares[i], ZPOOL_CONFIG_VDEV_STATS, 3333 (uint64_t **)&vs, &vsc) == 0); 3334 vs->vs_state = VDEV_STATE_CANT_OPEN; 3335 vs->vs_aux = VDEV_AUX_SPARED; 3336 } 3337 } 3338 } 3339} 3340 3341/* 3342 * Add l2cache device information to the nvlist, including vdev stats. 3343 */ 3344static void 3345spa_add_l2cache(spa_t *spa, nvlist_t *config) 3346{ 3347 nvlist_t **l2cache; 3348 uint_t i, j, nl2cache; 3349 nvlist_t *nvroot; 3350 uint64_t guid; 3351 vdev_t *vd; 3352 vdev_stat_t *vs; 3353 uint_t vsc; 3354 3355 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3356 3357 if (spa->spa_l2cache.sav_count == 0) 3358 return; 3359 3360 VERIFY(nvlist_lookup_nvlist(config, 3361 ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); 3362 VERIFY(nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 3363 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3364 if (nl2cache != 0) { 3365 VERIFY(nvlist_add_nvlist_array(nvroot, 3366 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3367 VERIFY(nvlist_lookup_nvlist_array(nvroot, 3368 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0); 3369 3370 /* 3371 * Update level 2 cache device stats. 3372 */ 3373 3374 for (i = 0; i < nl2cache; i++) { 3375 VERIFY(nvlist_lookup_uint64(l2cache[i], 3376 ZPOOL_CONFIG_GUID, &guid) == 0); 3377 3378 vd = NULL; 3379 for (j = 0; j < spa->spa_l2cache.sav_count; j++) { 3380 if (guid == 3381 spa->spa_l2cache.sav_vdevs[j]->vdev_guid) { 3382 vd = spa->spa_l2cache.sav_vdevs[j]; 3383 break; 3384 } 3385 } 3386 ASSERT(vd != NULL); 3387 3388 VERIFY(nvlist_lookup_uint64_array(l2cache[i], 3389 ZPOOL_CONFIG_VDEV_STATS, (uint64_t **)&vs, &vsc) 3390 == 0); 3391 vdev_get_stats(vd, vs); 3392 } 3393 } 3394} 3395 3396static void 3397spa_add_feature_stats(spa_t *spa, nvlist_t *config) 3398{ 3399 nvlist_t *features; 3400 zap_cursor_t zc; 3401 zap_attribute_t za; 3402 3403 ASSERT(spa_config_held(spa, SCL_CONFIG, RW_READER)); 3404 VERIFY(nvlist_alloc(&features, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3405 3406 /* We may be unable to read features if pool is suspended. */ 3407 if (spa_suspended(spa)) 3408 goto out; 3409 3410 if (spa->spa_feat_for_read_obj != 0) { 3411 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3412 spa->spa_feat_for_read_obj); 3413 zap_cursor_retrieve(&zc, &za) == 0; 3414 zap_cursor_advance(&zc)) { 3415 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3416 za.za_num_integers == 1); 3417 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3418 za.za_first_integer)); 3419 } 3420 zap_cursor_fini(&zc); 3421 } 3422 3423 if (spa->spa_feat_for_write_obj != 0) { 3424 for (zap_cursor_init(&zc, spa->spa_meta_objset, 3425 spa->spa_feat_for_write_obj); 3426 zap_cursor_retrieve(&zc, &za) == 0; 3427 zap_cursor_advance(&zc)) { 3428 ASSERT(za.za_integer_length == sizeof (uint64_t) && 3429 za.za_num_integers == 1); 3430 VERIFY3U(0, ==, nvlist_add_uint64(features, za.za_name, 3431 za.za_first_integer)); 3432 } 3433 zap_cursor_fini(&zc); 3434 } 3435 3436out: 3437 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURE_STATS, 3438 features) == 0); 3439 nvlist_free(features); 3440} 3441 3442int 3443spa_get_stats(const char *name, nvlist_t **config, 3444 char *altroot, size_t buflen) 3445{ 3446 int error; 3447 spa_t *spa; 3448 3449 *config = NULL; 3450 error = spa_open_common(name, &spa, FTAG, NULL, config); 3451 3452 if (spa != NULL) { 3453 /* 3454 * This still leaves a window of inconsistency where the spares 3455 * or l2cache devices could change and the config would be 3456 * self-inconsistent. 3457 */ 3458 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 3459 3460 if (*config != NULL) { 3461 uint64_t loadtimes[2]; 3462 3463 loadtimes[0] = spa->spa_loaded_ts.tv_sec; 3464 loadtimes[1] = spa->spa_loaded_ts.tv_nsec; 3465 VERIFY(nvlist_add_uint64_array(*config, 3466 ZPOOL_CONFIG_LOADED_TIME, loadtimes, 2) == 0); 3467 3468 VERIFY(nvlist_add_uint64(*config, 3469 ZPOOL_CONFIG_ERRCOUNT, 3470 spa_get_errlog_size(spa)) == 0); 3471 3472 if (spa_suspended(spa)) 3473 VERIFY(nvlist_add_uint64(*config, 3474 ZPOOL_CONFIG_SUSPENDED, 3475 spa->spa_failmode) == 0); 3476 3477 spa_add_spares(spa, *config); 3478 spa_add_l2cache(spa, *config); 3479 spa_add_feature_stats(spa, *config); 3480 } 3481 } 3482 3483 /* 3484 * We want to get the alternate root even for faulted pools, so we cheat 3485 * and call spa_lookup() directly. 3486 */ 3487 if (altroot) { 3488 if (spa == NULL) { 3489 mutex_enter(&spa_namespace_lock); 3490 spa = spa_lookup(name); 3491 if (spa) 3492 spa_altroot(spa, altroot, buflen); 3493 else 3494 altroot[0] = '\0'; 3495 spa = NULL; 3496 mutex_exit(&spa_namespace_lock); 3497 } else { 3498 spa_altroot(spa, altroot, buflen); 3499 } 3500 } 3501 3502 if (spa != NULL) { 3503 spa_config_exit(spa, SCL_CONFIG, FTAG); 3504 spa_close(spa, FTAG); 3505 } 3506 3507 return (error); 3508} 3509 3510/* 3511 * Validate that the auxiliary device array is well formed. We must have an 3512 * array of nvlists, each which describes a valid leaf vdev. If this is an 3513 * import (mode is VDEV_ALLOC_SPARE), then we allow corrupted spares to be 3514 * specified, as long as they are well-formed. 3515 */ 3516static int 3517spa_validate_aux_devs(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode, 3518 spa_aux_vdev_t *sav, const char *config, uint64_t version, 3519 vdev_labeltype_t label) 3520{ 3521 nvlist_t **dev; 3522 uint_t i, ndev; 3523 vdev_t *vd; 3524 int error; 3525 3526 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3527 3528 /* 3529 * It's acceptable to have no devs specified. 3530 */ 3531 if (nvlist_lookup_nvlist_array(nvroot, config, &dev, &ndev) != 0) 3532 return (0); 3533 3534 if (ndev == 0) 3535 return (SET_ERROR(EINVAL)); 3536 3537 /* 3538 * Make sure the pool is formatted with a version that supports this 3539 * device type. 3540 */ 3541 if (spa_version(spa) < version) 3542 return (SET_ERROR(ENOTSUP)); 3543 3544 /* 3545 * Set the pending device list so we correctly handle device in-use 3546 * checking. 3547 */ 3548 sav->sav_pending = dev; 3549 sav->sav_npending = ndev; 3550 3551 for (i = 0; i < ndev; i++) { 3552 if ((error = spa_config_parse(spa, &vd, dev[i], NULL, 0, 3553 mode)) != 0) 3554 goto out; 3555 3556 if (!vd->vdev_ops->vdev_op_leaf) { 3557 vdev_free(vd); 3558 error = SET_ERROR(EINVAL); 3559 goto out; 3560 } 3561 3562 /* 3563 * The L2ARC currently only supports disk devices in 3564 * kernel context. For user-level testing, we allow it. 3565 */ 3566#ifdef _KERNEL 3567 if ((strcmp(config, ZPOOL_CONFIG_L2CACHE) == 0) && 3568 strcmp(vd->vdev_ops->vdev_op_type, VDEV_TYPE_DISK) != 0) { 3569 error = SET_ERROR(ENOTBLK); 3570 vdev_free(vd); 3571 goto out; 3572 } 3573#endif 3574 vd->vdev_top = vd; 3575 3576 if ((error = vdev_open(vd)) == 0 && 3577 (error = vdev_label_init(vd, crtxg, label)) == 0) { 3578 VERIFY(nvlist_add_uint64(dev[i], ZPOOL_CONFIG_GUID, 3579 vd->vdev_guid) == 0); 3580 } 3581 3582 vdev_free(vd); 3583 3584 if (error && 3585 (mode != VDEV_ALLOC_SPARE && mode != VDEV_ALLOC_L2CACHE)) 3586 goto out; 3587 else 3588 error = 0; 3589 } 3590 3591out: 3592 sav->sav_pending = NULL; 3593 sav->sav_npending = 0; 3594 return (error); 3595} 3596 3597static int 3598spa_validate_aux(spa_t *spa, nvlist_t *nvroot, uint64_t crtxg, int mode) 3599{ 3600 int error; 3601 3602 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 3603 3604 if ((error = spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3605 &spa->spa_spares, ZPOOL_CONFIG_SPARES, SPA_VERSION_SPARES, 3606 VDEV_LABEL_SPARE)) != 0) { 3607 return (error); 3608 } 3609 3610 return (spa_validate_aux_devs(spa, nvroot, crtxg, mode, 3611 &spa->spa_l2cache, ZPOOL_CONFIG_L2CACHE, SPA_VERSION_L2CACHE, 3612 VDEV_LABEL_L2CACHE)); 3613} 3614 3615static void 3616spa_set_aux_vdevs(spa_aux_vdev_t *sav, nvlist_t **devs, int ndevs, 3617 const char *config) 3618{ 3619 int i; 3620 3621 if (sav->sav_config != NULL) { 3622 nvlist_t **olddevs; 3623 uint_t oldndevs; 3624 nvlist_t **newdevs; 3625 3626 /* 3627 * Generate new dev list by concatentating with the 3628 * current dev list. 3629 */ 3630 VERIFY(nvlist_lookup_nvlist_array(sav->sav_config, config, 3631 &olddevs, &oldndevs) == 0); 3632 3633 newdevs = kmem_alloc(sizeof (void *) * 3634 (ndevs + oldndevs), KM_SLEEP); 3635 for (i = 0; i < oldndevs; i++) 3636 VERIFY(nvlist_dup(olddevs[i], &newdevs[i], 3637 KM_SLEEP) == 0); 3638 for (i = 0; i < ndevs; i++) 3639 VERIFY(nvlist_dup(devs[i], &newdevs[i + oldndevs], 3640 KM_SLEEP) == 0); 3641 3642 VERIFY(nvlist_remove(sav->sav_config, config, 3643 DATA_TYPE_NVLIST_ARRAY) == 0); 3644 3645 VERIFY(nvlist_add_nvlist_array(sav->sav_config, 3646 config, newdevs, ndevs + oldndevs) == 0); 3647 for (i = 0; i < oldndevs + ndevs; i++) 3648 nvlist_free(newdevs[i]); 3649 kmem_free(newdevs, (oldndevs + ndevs) * sizeof (void *)); 3650 } else { 3651 /* 3652 * Generate a new dev list. 3653 */ 3654 VERIFY(nvlist_alloc(&sav->sav_config, NV_UNIQUE_NAME, 3655 KM_SLEEP) == 0); 3656 VERIFY(nvlist_add_nvlist_array(sav->sav_config, config, 3657 devs, ndevs) == 0); 3658 } 3659} 3660 3661/* 3662 * Stop and drop level 2 ARC devices 3663 */ 3664void 3665spa_l2cache_drop(spa_t *spa) 3666{ 3667 vdev_t *vd; 3668 int i; 3669 spa_aux_vdev_t *sav = &spa->spa_l2cache; 3670 3671 for (i = 0; i < sav->sav_count; i++) { 3672 uint64_t pool; 3673 3674 vd = sav->sav_vdevs[i]; 3675 ASSERT(vd != NULL); 3676 3677 if (spa_l2cache_exists(vd->vdev_guid, &pool) && 3678 pool != 0ULL && l2arc_vdev_present(vd)) 3679 l2arc_remove_vdev(vd); 3680 } 3681} 3682 3683/* 3684 * Pool Creation 3685 */ 3686int 3687spa_create(const char *pool, nvlist_t *nvroot, nvlist_t *props, 3688 nvlist_t *zplprops) 3689{ 3690 spa_t *spa; 3691 char *altroot = NULL; 3692 vdev_t *rvd; 3693 dsl_pool_t *dp; 3694 dmu_tx_t *tx; 3695 int error = 0; 3696 uint64_t txg = TXG_INITIAL; 3697 nvlist_t **spares, **l2cache; 3698 uint_t nspares, nl2cache; 3699 uint64_t version, obj; 3700 boolean_t has_features; 3701 3702 /* 3703 * If this pool already exists, return failure. 3704 */ 3705 mutex_enter(&spa_namespace_lock); 3706 if (spa_lookup(pool) != NULL) { 3707 mutex_exit(&spa_namespace_lock); 3708 return (SET_ERROR(EEXIST)); 3709 } 3710 3711 /* 3712 * Allocate a new spa_t structure. 3713 */ 3714 (void) nvlist_lookup_string(props, 3715 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 3716 spa = spa_add(pool, NULL, altroot); 3717 spa_activate(spa, spa_mode_global); 3718 3719 if (props && (error = spa_prop_validate(spa, props))) { 3720 spa_deactivate(spa); 3721 spa_remove(spa); 3722 mutex_exit(&spa_namespace_lock); 3723 return (error); 3724 } 3725 3726 has_features = B_FALSE; 3727 for (nvpair_t *elem = nvlist_next_nvpair(props, NULL); 3728 elem != NULL; elem = nvlist_next_nvpair(props, elem)) { 3729 if (zpool_prop_feature(nvpair_name(elem))) 3730 has_features = B_TRUE; 3731 } 3732 3733 if (has_features || nvlist_lookup_uint64(props, 3734 zpool_prop_to_name(ZPOOL_PROP_VERSION), &version) != 0) { 3735 version = SPA_VERSION; 3736 } 3737 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 3738 3739 spa->spa_first_txg = txg; 3740 spa->spa_uberblock.ub_txg = txg - 1; 3741 spa->spa_uberblock.ub_version = version; 3742 spa->spa_ubsync = spa->spa_uberblock; 3743 spa->spa_load_state = SPA_LOAD_CREATE; 3744 3745 /* 3746 * Create "The Godfather" zio to hold all async IOs 3747 */ 3748 spa->spa_async_zio_root = kmem_alloc(max_ncpus * sizeof (void *), 3749 KM_SLEEP); 3750 for (int i = 0; i < max_ncpus; i++) { 3751 spa->spa_async_zio_root[i] = zio_root(spa, NULL, NULL, 3752 ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE | 3753 ZIO_FLAG_GODFATHER); 3754 } 3755 3756 /* 3757 * Create the root vdev. 3758 */ 3759 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3760 3761 error = spa_config_parse(spa, &rvd, nvroot, NULL, 0, VDEV_ALLOC_ADD); 3762 3763 ASSERT(error != 0 || rvd != NULL); 3764 ASSERT(error != 0 || spa->spa_root_vdev == rvd); 3765 3766 if (error == 0 && !zfs_allocatable_devs(nvroot)) 3767 error = SET_ERROR(EINVAL); 3768 3769 if (error == 0 && 3770 (error = vdev_create(rvd, txg, B_FALSE)) == 0 && 3771 (error = spa_validate_aux(spa, nvroot, txg, 3772 VDEV_ALLOC_ADD)) == 0) { 3773 for (int c = 0; c < rvd->vdev_children; c++) { 3774 vdev_ashift_optimize(rvd->vdev_child[c]); 3775 vdev_metaslab_set_size(rvd->vdev_child[c]); 3776 vdev_expand(rvd->vdev_child[c], txg); 3777 } 3778 } 3779 3780 spa_config_exit(spa, SCL_ALL, FTAG); 3781 3782 if (error != 0) { 3783 spa_unload(spa); 3784 spa_deactivate(spa); 3785 spa_remove(spa); 3786 mutex_exit(&spa_namespace_lock); 3787 return (error); 3788 } 3789 3790 /* 3791 * Get the list of spares, if specified. 3792 */ 3793 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 3794 &spares, &nspares) == 0) { 3795 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, NV_UNIQUE_NAME, 3796 KM_SLEEP) == 0); 3797 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 3798 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 3799 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3800 spa_load_spares(spa); 3801 spa_config_exit(spa, SCL_ALL, FTAG); 3802 spa->spa_spares.sav_sync = B_TRUE; 3803 } 3804 3805 /* 3806 * Get the list of level 2 cache devices, if specified. 3807 */ 3808 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 3809 &l2cache, &nl2cache) == 0) { 3810 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 3811 NV_UNIQUE_NAME, KM_SLEEP) == 0); 3812 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 3813 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 3814 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 3815 spa_load_l2cache(spa); 3816 spa_config_exit(spa, SCL_ALL, FTAG); 3817 spa->spa_l2cache.sav_sync = B_TRUE; 3818 } 3819 3820 spa->spa_is_initializing = B_TRUE; 3821 spa->spa_dsl_pool = dp = dsl_pool_create(spa, zplprops, txg); 3822 spa->spa_meta_objset = dp->dp_meta_objset; 3823 spa->spa_is_initializing = B_FALSE; 3824 3825 /* 3826 * Create DDTs (dedup tables). 3827 */ 3828 ddt_create(spa); 3829 3830 spa_update_dspace(spa); 3831 3832 tx = dmu_tx_create_assigned(dp, txg); 3833 3834 /* 3835 * Create the pool config object. 3836 */ 3837 spa->spa_config_object = dmu_object_alloc(spa->spa_meta_objset, 3838 DMU_OT_PACKED_NVLIST, SPA_CONFIG_BLOCKSIZE, 3839 DMU_OT_PACKED_NVLIST_SIZE, sizeof (uint64_t), tx); 3840 3841 if (zap_add(spa->spa_meta_objset, 3842 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CONFIG, 3843 sizeof (uint64_t), 1, &spa->spa_config_object, tx) != 0) { 3844 cmn_err(CE_PANIC, "failed to add pool config"); 3845 } 3846 3847 if (spa_version(spa) >= SPA_VERSION_FEATURES) 3848 spa_feature_create_zap_objects(spa, tx); 3849 3850 if (zap_add(spa->spa_meta_objset, 3851 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CREATION_VERSION, 3852 sizeof (uint64_t), 1, &version, tx) != 0) { 3853 cmn_err(CE_PANIC, "failed to add pool version"); 3854 } 3855 3856 /* Newly created pools with the right version are always deflated. */ 3857 if (version >= SPA_VERSION_RAIDZ_DEFLATE) { 3858 spa->spa_deflate = TRUE; 3859 if (zap_add(spa->spa_meta_objset, 3860 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 3861 sizeof (uint64_t), 1, &spa->spa_deflate, tx) != 0) { 3862 cmn_err(CE_PANIC, "failed to add deflate"); 3863 } 3864 } 3865 3866 /* 3867 * Create the deferred-free bpobj. Turn off compression 3868 * because sync-to-convergence takes longer if the blocksize 3869 * keeps changing. 3870 */ 3871 obj = bpobj_alloc(spa->spa_meta_objset, 1 << 14, tx); 3872 dmu_object_set_compress(spa->spa_meta_objset, obj, 3873 ZIO_COMPRESS_OFF, tx); 3874 if (zap_add(spa->spa_meta_objset, 3875 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_SYNC_BPOBJ, 3876 sizeof (uint64_t), 1, &obj, tx) != 0) { 3877 cmn_err(CE_PANIC, "failed to add bpobj"); 3878 } 3879 VERIFY3U(0, ==, bpobj_open(&spa->spa_deferred_bpobj, 3880 spa->spa_meta_objset, obj)); 3881 3882 /* 3883 * Create the pool's history object. 3884 */ 3885 if (version >= SPA_VERSION_ZPOOL_HISTORY) 3886 spa_history_create_obj(spa, tx); 3887 3888 /* 3889 * Generate some random noise for salted checksums to operate on. 3890 */ 3891 (void) random_get_pseudo_bytes(spa->spa_cksum_salt.zcs_bytes, 3892 sizeof (spa->spa_cksum_salt.zcs_bytes)); 3893 3894 /* 3895 * Set pool properties. 3896 */ 3897 spa->spa_bootfs = zpool_prop_default_numeric(ZPOOL_PROP_BOOTFS); 3898 spa->spa_delegation = zpool_prop_default_numeric(ZPOOL_PROP_DELEGATION); 3899 spa->spa_failmode = zpool_prop_default_numeric(ZPOOL_PROP_FAILUREMODE); 3900 spa->spa_autoexpand = zpool_prop_default_numeric(ZPOOL_PROP_AUTOEXPAND); 3901 3902 if (props != NULL) { 3903 spa_configfile_set(spa, props, B_FALSE); 3904 spa_sync_props(props, tx); 3905 } 3906 3907 dmu_tx_commit(tx); 3908 3909 spa->spa_sync_on = B_TRUE; 3910 txg_sync_start(spa->spa_dsl_pool); 3911 3912 /* 3913 * We explicitly wait for the first transaction to complete so that our 3914 * bean counters are appropriately updated. 3915 */ 3916 txg_wait_synced(spa->spa_dsl_pool, txg); 3917 3918 spa_config_sync(spa, B_FALSE, B_TRUE); 3919 spa_event_notify(spa, NULL, ESC_ZFS_POOL_CREATE); 3920 3921 spa_history_log_version(spa, "create"); 3922 3923 /* 3924 * Don't count references from objsets that are already closed 3925 * and are making their way through the eviction process. 3926 */ 3927 spa_evicting_os_wait(spa); 3928 spa->spa_minref = refcount_count(&spa->spa_refcount); 3929 spa->spa_load_state = SPA_LOAD_NONE; 3930 3931 mutex_exit(&spa_namespace_lock); 3932 3933 return (0); 3934} 3935 3936#ifdef _KERNEL 3937#ifdef illumos 3938/* 3939 * Get the root pool information from the root disk, then import the root pool 3940 * during the system boot up time. 3941 */ 3942extern int vdev_disk_read_rootlabel(char *, char *, nvlist_t **); 3943 3944static nvlist_t * 3945spa_generate_rootconf(char *devpath, char *devid, uint64_t *guid) 3946{ 3947 nvlist_t *config; 3948 nvlist_t *nvtop, *nvroot; 3949 uint64_t pgid; 3950 3951 if (vdev_disk_read_rootlabel(devpath, devid, &config) != 0) 3952 return (NULL); 3953 3954 /* 3955 * Add this top-level vdev to the child array. 3956 */ 3957 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 3958 &nvtop) == 0); 3959 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 3960 &pgid) == 0); 3961 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, guid) == 0); 3962 3963 /* 3964 * Put this pool's top-level vdevs into a root vdev. 3965 */ 3966 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 3967 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 3968 VDEV_TYPE_ROOT) == 0); 3969 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 3970 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 3971 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 3972 &nvtop, 1) == 0); 3973 3974 /* 3975 * Replace the existing vdev_tree with the new root vdev in 3976 * this pool's configuration (remove the old, add the new). 3977 */ 3978 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 3979 nvlist_free(nvroot); 3980 return (config); 3981} 3982 3983/* 3984 * Walk the vdev tree and see if we can find a device with "better" 3985 * configuration. A configuration is "better" if the label on that 3986 * device has a more recent txg. 3987 */ 3988static void 3989spa_alt_rootvdev(vdev_t *vd, vdev_t **avd, uint64_t *txg) 3990{ 3991 for (int c = 0; c < vd->vdev_children; c++) 3992 spa_alt_rootvdev(vd->vdev_child[c], avd, txg); 3993 3994 if (vd->vdev_ops->vdev_op_leaf) { 3995 nvlist_t *label; 3996 uint64_t label_txg; 3997 3998 if (vdev_disk_read_rootlabel(vd->vdev_physpath, vd->vdev_devid, 3999 &label) != 0) 4000 return; 4001 4002 VERIFY(nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_TXG, 4003 &label_txg) == 0); 4004 4005 /* 4006 * Do we have a better boot device? 4007 */ 4008 if (label_txg > *txg) { 4009 *txg = label_txg; 4010 *avd = vd; 4011 } 4012 nvlist_free(label); 4013 } 4014} 4015 4016/* 4017 * Import a root pool. 4018 * 4019 * For x86. devpath_list will consist of devid and/or physpath name of 4020 * the vdev (e.g. "id1,sd@SSEAGATE..." or "/pci@1f,0/ide@d/disk@0,0:a"). 4021 * The GRUB "findroot" command will return the vdev we should boot. 4022 * 4023 * For Sparc, devpath_list consists the physpath name of the booting device 4024 * no matter the rootpool is a single device pool or a mirrored pool. 4025 * e.g. 4026 * "/pci@1f,0/ide@d/disk@0,0:a" 4027 */ 4028int 4029spa_import_rootpool(char *devpath, char *devid) 4030{ 4031 spa_t *spa; 4032 vdev_t *rvd, *bvd, *avd = NULL; 4033 nvlist_t *config, *nvtop; 4034 uint64_t guid, txg; 4035 char *pname; 4036 int error; 4037 4038 /* 4039 * Read the label from the boot device and generate a configuration. 4040 */ 4041 config = spa_generate_rootconf(devpath, devid, &guid); 4042#if defined(_OBP) && defined(_KERNEL) 4043 if (config == NULL) { 4044 if (strstr(devpath, "/iscsi/ssd") != NULL) { 4045 /* iscsi boot */ 4046 get_iscsi_bootpath_phy(devpath); 4047 config = spa_generate_rootconf(devpath, devid, &guid); 4048 } 4049 } 4050#endif 4051 if (config == NULL) { 4052 cmn_err(CE_NOTE, "Cannot read the pool label from '%s'", 4053 devpath); 4054 return (SET_ERROR(EIO)); 4055 } 4056 4057 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 4058 &pname) == 0); 4059 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) == 0); 4060 4061 mutex_enter(&spa_namespace_lock); 4062 if ((spa = spa_lookup(pname)) != NULL) { 4063 /* 4064 * Remove the existing root pool from the namespace so that we 4065 * can replace it with the correct config we just read in. 4066 */ 4067 spa_remove(spa); 4068 } 4069 4070 spa = spa_add(pname, config, NULL); 4071 spa->spa_is_root = B_TRUE; 4072 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 4073 4074 /* 4075 * Build up a vdev tree based on the boot device's label config. 4076 */ 4077 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4078 &nvtop) == 0); 4079 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4080 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 4081 VDEV_ALLOC_ROOTPOOL); 4082 spa_config_exit(spa, SCL_ALL, FTAG); 4083 if (error) { 4084 mutex_exit(&spa_namespace_lock); 4085 nvlist_free(config); 4086 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 4087 pname); 4088 return (error); 4089 } 4090 4091 /* 4092 * Get the boot vdev. 4093 */ 4094 if ((bvd = vdev_lookup_by_guid(rvd, guid)) == NULL) { 4095 cmn_err(CE_NOTE, "Can not find the boot vdev for guid %llu", 4096 (u_longlong_t)guid); 4097 error = SET_ERROR(ENOENT); 4098 goto out; 4099 } 4100 4101 /* 4102 * Determine if there is a better boot device. 4103 */ 4104 avd = bvd; 4105 spa_alt_rootvdev(rvd, &avd, &txg); 4106 if (avd != bvd) { 4107 cmn_err(CE_NOTE, "The boot device is 'degraded'. Please " 4108 "try booting from '%s'", avd->vdev_path); 4109 error = SET_ERROR(EINVAL); 4110 goto out; 4111 } 4112 4113 /* 4114 * If the boot device is part of a spare vdev then ensure that 4115 * we're booting off the active spare. 4116 */ 4117 if (bvd->vdev_parent->vdev_ops == &vdev_spare_ops && 4118 !bvd->vdev_isspare) { 4119 cmn_err(CE_NOTE, "The boot device is currently spared. Please " 4120 "try booting from '%s'", 4121 bvd->vdev_parent-> 4122 vdev_child[bvd->vdev_parent->vdev_children - 1]->vdev_path); 4123 error = SET_ERROR(EINVAL); 4124 goto out; 4125 } 4126 4127 error = 0; 4128out: 4129 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4130 vdev_free(rvd); 4131 spa_config_exit(spa, SCL_ALL, FTAG); 4132 mutex_exit(&spa_namespace_lock); 4133 4134 nvlist_free(config); 4135 return (error); 4136} 4137 4138#else /* !illumos */ 4139 4140extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs, 4141 uint64_t *count); 4142 4143static nvlist_t * 4144spa_generate_rootconf(const char *name) 4145{ 4146 nvlist_t **configs, **tops; 4147 nvlist_t *config; 4148 nvlist_t *best_cfg, *nvtop, *nvroot; 4149 uint64_t *holes; 4150 uint64_t best_txg; 4151 uint64_t nchildren; 4152 uint64_t pgid; 4153 uint64_t count; 4154 uint64_t i; 4155 uint_t nholes; 4156 4157 if (vdev_geom_read_pool_label(name, &configs, &count) != 0) 4158 return (NULL); 4159 4160 ASSERT3U(count, !=, 0); 4161 best_txg = 0; 4162 for (i = 0; i < count; i++) { 4163 uint64_t txg; 4164 4165 VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG, 4166 &txg) == 0); 4167 if (txg > best_txg) { 4168 best_txg = txg; 4169 best_cfg = configs[i]; 4170 } 4171 } 4172 4173 nchildren = 1; 4174 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren); 4175 holes = NULL; 4176 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY, 4177 &holes, &nholes); 4178 4179 tops = kmem_zalloc(nchildren * sizeof(void *), KM_SLEEP); 4180 for (i = 0; i < nchildren; i++) { 4181 if (i >= count) 4182 break; 4183 if (configs[i] == NULL) 4184 continue; 4185 VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE, 4186 &nvtop) == 0); 4187 nvlist_dup(nvtop, &tops[i], KM_SLEEP); 4188 } 4189 for (i = 0; holes != NULL && i < nholes; i++) { 4190 if (i >= nchildren) 4191 continue; 4192 if (tops[holes[i]] != NULL) 4193 continue; 4194 nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP); 4195 VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE, 4196 VDEV_TYPE_HOLE) == 0); 4197 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, 4198 holes[i]) == 0); 4199 VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 4200 0) == 0); 4201 } 4202 for (i = 0; i < nchildren; i++) { 4203 if (tops[i] != NULL) 4204 continue; 4205 nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP); 4206 VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE, 4207 VDEV_TYPE_MISSING) == 0); 4208 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, 4209 i) == 0); 4210 VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 4211 0) == 0); 4212 } 4213 4214 /* 4215 * Create pool config based on the best vdev config. 4216 */ 4217 nvlist_dup(best_cfg, &config, KM_SLEEP); 4218 4219 /* 4220 * Put this pool's top-level vdevs into a root vdev. 4221 */ 4222 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, 4223 &pgid) == 0); 4224 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 4225 VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, 4226 VDEV_TYPE_ROOT) == 0); 4227 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0); 4228 VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0); 4229 VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 4230 tops, nchildren) == 0); 4231 4232 /* 4233 * Replace the existing vdev_tree with the new root vdev in 4234 * this pool's configuration (remove the old, add the new). 4235 */ 4236 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 4237 4238 /* 4239 * Drop vdev config elements that should not be present at pool level. 4240 */ 4241 nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64); 4242 nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64); 4243 4244 for (i = 0; i < count; i++) 4245 nvlist_free(configs[i]); 4246 kmem_free(configs, count * sizeof(void *)); 4247 for (i = 0; i < nchildren; i++) 4248 nvlist_free(tops[i]); 4249 kmem_free(tops, nchildren * sizeof(void *)); 4250 nvlist_free(nvroot); 4251 return (config); 4252} 4253 4254int 4255spa_import_rootpool(const char *name) 4256{ 4257 spa_t *spa; 4258 vdev_t *rvd, *bvd, *avd = NULL; 4259 nvlist_t *config, *nvtop; 4260 uint64_t txg; 4261 char *pname; 4262 int error; 4263 4264 /* 4265 * Read the label from the boot device and generate a configuration. 4266 */ 4267 config = spa_generate_rootconf(name); 4268 4269 mutex_enter(&spa_namespace_lock); 4270 if (config != NULL) { 4271 VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, 4272 &pname) == 0 && strcmp(name, pname) == 0); 4273 VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg) 4274 == 0); 4275 4276 if ((spa = spa_lookup(pname)) != NULL) { 4277 /* 4278 * The pool could already be imported, 4279 * e.g., after reboot -r. 4280 */ 4281 if (spa->spa_state == POOL_STATE_ACTIVE) { 4282 mutex_exit(&spa_namespace_lock); 4283 nvlist_free(config); 4284 return (0); 4285 } 4286 4287 /* 4288 * Remove the existing root pool from the namespace so 4289 * that we can replace it with the correct config 4290 * we just read in. 4291 */ 4292 spa_remove(spa); 4293 } 4294 spa = spa_add(pname, config, NULL); 4295 4296 /* 4297 * Set spa_ubsync.ub_version as it can be used in vdev_alloc() 4298 * via spa_version(). 4299 */ 4300 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 4301 &spa->spa_ubsync.ub_version) != 0) 4302 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 4303 } else if ((spa = spa_lookup(name)) == NULL) { 4304 mutex_exit(&spa_namespace_lock); 4305 nvlist_free(config); 4306 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'", 4307 name); 4308 return (EIO); 4309 } else { 4310 VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0); 4311 } 4312 spa->spa_is_root = B_TRUE; 4313 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 4314 4315 /* 4316 * Build up a vdev tree based on the boot device's label config. 4317 */ 4318 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4319 &nvtop) == 0); 4320 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4321 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 4322 VDEV_ALLOC_ROOTPOOL); 4323 spa_config_exit(spa, SCL_ALL, FTAG); 4324 if (error) { 4325 mutex_exit(&spa_namespace_lock); 4326 nvlist_free(config); 4327 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 4328 pname); 4329 return (error); 4330 } 4331 4332 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4333 vdev_free(rvd); 4334 spa_config_exit(spa, SCL_ALL, FTAG); 4335 mutex_exit(&spa_namespace_lock); 4336 4337 nvlist_free(config); 4338 return (0); 4339} 4340 4341#endif /* illumos */ 4342#endif /* _KERNEL */ 4343 4344/* 4345 * Import a non-root pool into the system. 4346 */ 4347int 4348spa_import(const char *pool, nvlist_t *config, nvlist_t *props, uint64_t flags) 4349{ 4350 spa_t *spa; 4351 char *altroot = NULL; 4352 spa_load_state_t state = SPA_LOAD_IMPORT; 4353 zpool_rewind_policy_t policy; 4354 uint64_t mode = spa_mode_global; 4355 uint64_t readonly = B_FALSE; 4356 int error; 4357 nvlist_t *nvroot; 4358 nvlist_t **spares, **l2cache; 4359 uint_t nspares, nl2cache; 4360 4361 /* 4362 * If a pool with this name exists, return failure. 4363 */ 4364 mutex_enter(&spa_namespace_lock); 4365 if (spa_lookup(pool) != NULL) { 4366 mutex_exit(&spa_namespace_lock); 4367 return (SET_ERROR(EEXIST)); 4368 } 4369 4370 /* 4371 * Create and initialize the spa structure. 4372 */ 4373 (void) nvlist_lookup_string(props, 4374 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 4375 (void) nvlist_lookup_uint64(props, 4376 zpool_prop_to_name(ZPOOL_PROP_READONLY), &readonly); 4377 if (readonly) 4378 mode = FREAD; 4379 spa = spa_add(pool, config, altroot); 4380 spa->spa_import_flags = flags; 4381 4382 /* 4383 * Verbatim import - Take a pool and insert it into the namespace 4384 * as if it had been loaded at boot. 4385 */ 4386 if (spa->spa_import_flags & ZFS_IMPORT_VERBATIM) { 4387 if (props != NULL) 4388 spa_configfile_set(spa, props, B_FALSE); 4389 4390 spa_config_sync(spa, B_FALSE, B_TRUE); 4391 spa_event_notify(spa, NULL, ESC_ZFS_POOL_IMPORT); 4392 4393 mutex_exit(&spa_namespace_lock); 4394 return (0); 4395 } 4396 4397 spa_activate(spa, mode); 4398 4399 /* 4400 * Don't start async tasks until we know everything is healthy. 4401 */ 4402 spa_async_suspend(spa); 4403 4404 zpool_get_rewind_policy(config, &policy); 4405 if (policy.zrp_request & ZPOOL_DO_REWIND) 4406 state = SPA_LOAD_RECOVER; 4407 4408 /* 4409 * Pass off the heavy lifting to spa_load(). Pass TRUE for mosconfig 4410 * because the user-supplied config is actually the one to trust when 4411 * doing an import. 4412 */ 4413 if (state != SPA_LOAD_RECOVER) 4414 spa->spa_last_ubsync_txg = spa->spa_load_txg = 0; 4415 4416 error = spa_load_best(spa, state, B_TRUE, policy.zrp_txg, 4417 policy.zrp_request); 4418 4419 /* 4420 * Propagate anything learned while loading the pool and pass it 4421 * back to caller (i.e. rewind info, missing devices, etc). 4422 */ 4423 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4424 spa->spa_load_info) == 0); 4425 4426 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4427 /* 4428 * Toss any existing sparelist, as it doesn't have any validity 4429 * anymore, and conflicts with spa_has_spare(). 4430 */ 4431 if (spa->spa_spares.sav_config) { 4432 nvlist_free(spa->spa_spares.sav_config); 4433 spa->spa_spares.sav_config = NULL; 4434 spa_load_spares(spa); 4435 } 4436 if (spa->spa_l2cache.sav_config) { 4437 nvlist_free(spa->spa_l2cache.sav_config); 4438 spa->spa_l2cache.sav_config = NULL; 4439 spa_load_l2cache(spa); 4440 } 4441 4442 VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, 4443 &nvroot) == 0); 4444 if (error == 0) 4445 error = spa_validate_aux(spa, nvroot, -1ULL, 4446 VDEV_ALLOC_SPARE); 4447 if (error == 0) 4448 error = spa_validate_aux(spa, nvroot, -1ULL, 4449 VDEV_ALLOC_L2CACHE); 4450 spa_config_exit(spa, SCL_ALL, FTAG); 4451 4452 if (props != NULL) 4453 spa_configfile_set(spa, props, B_FALSE); 4454 4455 if (error != 0 || (props && spa_writeable(spa) && 4456 (error = spa_prop_set(spa, props)))) { 4457 spa_unload(spa); 4458 spa_deactivate(spa); 4459 spa_remove(spa); 4460 mutex_exit(&spa_namespace_lock); 4461 return (error); 4462 } 4463 4464 spa_async_resume(spa); 4465 4466 /* 4467 * Override any spares and level 2 cache devices as specified by 4468 * the user, as these may have correct device names/devids, etc. 4469 */ 4470 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, 4471 &spares, &nspares) == 0) { 4472 if (spa->spa_spares.sav_config) 4473 VERIFY(nvlist_remove(spa->spa_spares.sav_config, 4474 ZPOOL_CONFIG_SPARES, DATA_TYPE_NVLIST_ARRAY) == 0); 4475 else 4476 VERIFY(nvlist_alloc(&spa->spa_spares.sav_config, 4477 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4478 VERIFY(nvlist_add_nvlist_array(spa->spa_spares.sav_config, 4479 ZPOOL_CONFIG_SPARES, spares, nspares) == 0); 4480 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4481 spa_load_spares(spa); 4482 spa_config_exit(spa, SCL_ALL, FTAG); 4483 spa->spa_spares.sav_sync = B_TRUE; 4484 } 4485 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, 4486 &l2cache, &nl2cache) == 0) { 4487 if (spa->spa_l2cache.sav_config) 4488 VERIFY(nvlist_remove(spa->spa_l2cache.sav_config, 4489 ZPOOL_CONFIG_L2CACHE, DATA_TYPE_NVLIST_ARRAY) == 0); 4490 else 4491 VERIFY(nvlist_alloc(&spa->spa_l2cache.sav_config, 4492 NV_UNIQUE_NAME, KM_SLEEP) == 0); 4493 VERIFY(nvlist_add_nvlist_array(spa->spa_l2cache.sav_config, 4494 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache) == 0); 4495 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4496 spa_load_l2cache(spa); 4497 spa_config_exit(spa, SCL_ALL, FTAG); 4498 spa->spa_l2cache.sav_sync = B_TRUE; 4499 } 4500 4501 /* 4502 * Check for any removed devices. 4503 */ 4504 if (spa->spa_autoreplace) { 4505 spa_aux_check_removed(&spa->spa_spares); 4506 spa_aux_check_removed(&spa->spa_l2cache); 4507 } 4508 4509 if (spa_writeable(spa)) { 4510 /* 4511 * Update the config cache to include the newly-imported pool. 4512 */ 4513 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4514 } 4515 4516 /* 4517 * It's possible that the pool was expanded while it was exported. 4518 * We kick off an async task to handle this for us. 4519 */ 4520 spa_async_request(spa, SPA_ASYNC_AUTOEXPAND); 4521 4522 spa_history_log_version(spa, "import"); 4523 4524 spa_event_notify(spa, NULL, ESC_ZFS_POOL_IMPORT); 4525 4526 mutex_exit(&spa_namespace_lock); 4527 4528#ifdef __FreeBSD__ 4529#ifdef _KERNEL 4530 zvol_create_minors(pool); 4531#endif 4532#endif 4533 return (0); 4534} 4535 4536nvlist_t * 4537spa_tryimport(nvlist_t *tryconfig) 4538{ 4539 nvlist_t *config = NULL; 4540 char *poolname; 4541 spa_t *spa; 4542 uint64_t state; 4543 int error; 4544 4545 if (nvlist_lookup_string(tryconfig, ZPOOL_CONFIG_POOL_NAME, &poolname)) 4546 return (NULL); 4547 4548 if (nvlist_lookup_uint64(tryconfig, ZPOOL_CONFIG_POOL_STATE, &state)) 4549 return (NULL); 4550 4551 /* 4552 * Create and initialize the spa structure. 4553 */ 4554 mutex_enter(&spa_namespace_lock); 4555 spa = spa_add(TRYIMPORT_NAME, tryconfig, NULL); 4556 spa_activate(spa, FREAD); 4557 4558 /* 4559 * Pass off the heavy lifting to spa_load(). 4560 * Pass TRUE for mosconfig because the user-supplied config 4561 * is actually the one to trust when doing an import. 4562 */ 4563 error = spa_load(spa, SPA_LOAD_TRYIMPORT, SPA_IMPORT_EXISTING, B_TRUE); 4564 4565 /* 4566 * If 'tryconfig' was at least parsable, return the current config. 4567 */ 4568 if (spa->spa_root_vdev != NULL) { 4569 config = spa_config_generate(spa, NULL, -1ULL, B_TRUE); 4570 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 4571 poolname) == 0); 4572 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 4573 state) == 0); 4574 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TIMESTAMP, 4575 spa->spa_uberblock.ub_timestamp) == 0); 4576 VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_LOAD_INFO, 4577 spa->spa_load_info) == 0); 4578 4579 /* 4580 * If the bootfs property exists on this pool then we 4581 * copy it out so that external consumers can tell which 4582 * pools are bootable. 4583 */ 4584 if ((!error || error == EEXIST) && spa->spa_bootfs) { 4585 char *tmpname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4586 4587 /* 4588 * We have to play games with the name since the 4589 * pool was opened as TRYIMPORT_NAME. 4590 */ 4591 if (dsl_dsobj_to_dsname(spa_name(spa), 4592 spa->spa_bootfs, tmpname) == 0) { 4593 char *cp; 4594 char *dsname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 4595 4596 cp = strchr(tmpname, '/'); 4597 if (cp == NULL) { 4598 (void) strlcpy(dsname, tmpname, 4599 MAXPATHLEN); 4600 } else { 4601 (void) snprintf(dsname, MAXPATHLEN, 4602 "%s/%s", poolname, ++cp); 4603 } 4604 VERIFY(nvlist_add_string(config, 4605 ZPOOL_CONFIG_BOOTFS, dsname) == 0); 4606 kmem_free(dsname, MAXPATHLEN); 4607 } 4608 kmem_free(tmpname, MAXPATHLEN); 4609 } 4610 4611 /* 4612 * Add the list of hot spares and level 2 cache devices. 4613 */ 4614 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 4615 spa_add_spares(spa, config); 4616 spa_add_l2cache(spa, config); 4617 spa_config_exit(spa, SCL_CONFIG, FTAG); 4618 } 4619 4620 spa_unload(spa); 4621 spa_deactivate(spa); 4622 spa_remove(spa); 4623 mutex_exit(&spa_namespace_lock); 4624 4625 return (config); 4626} 4627 4628/* 4629 * Pool export/destroy 4630 * 4631 * The act of destroying or exporting a pool is very simple. We make sure there 4632 * is no more pending I/O and any references to the pool are gone. Then, we 4633 * update the pool state and sync all the labels to disk, removing the 4634 * configuration from the cache afterwards. If the 'hardforce' flag is set, then 4635 * we don't sync the labels or remove the configuration cache. 4636 */ 4637static int 4638spa_export_common(char *pool, int new_state, nvlist_t **oldconfig, 4639 boolean_t force, boolean_t hardforce) 4640{ 4641 spa_t *spa; 4642 4643 if (oldconfig) 4644 *oldconfig = NULL; 4645 4646 if (!(spa_mode_global & FWRITE)) 4647 return (SET_ERROR(EROFS)); 4648 4649 mutex_enter(&spa_namespace_lock); 4650 if ((spa = spa_lookup(pool)) == NULL) { 4651 mutex_exit(&spa_namespace_lock); 4652 return (SET_ERROR(ENOENT)); 4653 } 4654 4655 /* 4656 * Put a hold on the pool, drop the namespace lock, stop async tasks, 4657 * reacquire the namespace lock, and see if we can export. 4658 */ 4659 spa_open_ref(spa, FTAG); 4660 mutex_exit(&spa_namespace_lock); 4661 spa_async_suspend(spa); 4662 mutex_enter(&spa_namespace_lock); 4663 spa_close(spa, FTAG); 4664 4665 /* 4666 * The pool will be in core if it's openable, 4667 * in which case we can modify its state. 4668 */ 4669 if (spa->spa_state != POOL_STATE_UNINITIALIZED && spa->spa_sync_on) { 4670 /* 4671 * Objsets may be open only because they're dirty, so we 4672 * have to force it to sync before checking spa_refcnt. 4673 */ 4674 txg_wait_synced(spa->spa_dsl_pool, 0); 4675 spa_evicting_os_wait(spa); 4676 4677 /* 4678 * A pool cannot be exported or destroyed if there are active 4679 * references. If we are resetting a pool, allow references by 4680 * fault injection handlers. 4681 */ 4682 if (!spa_refcount_zero(spa) || 4683 (spa->spa_inject_ref != 0 && 4684 new_state != POOL_STATE_UNINITIALIZED)) { 4685 spa_async_resume(spa); 4686 mutex_exit(&spa_namespace_lock); 4687 return (SET_ERROR(EBUSY)); 4688 } 4689 4690 /* 4691 * A pool cannot be exported if it has an active shared spare. 4692 * This is to prevent other pools stealing the active spare 4693 * from an exported pool. At user's own will, such pool can 4694 * be forcedly exported. 4695 */ 4696 if (!force && new_state == POOL_STATE_EXPORTED && 4697 spa_has_active_shared_spare(spa)) { 4698 spa_async_resume(spa); 4699 mutex_exit(&spa_namespace_lock); 4700 return (SET_ERROR(EXDEV)); 4701 } 4702 4703 /* 4704 * We want this to be reflected on every label, 4705 * so mark them all dirty. spa_unload() will do the 4706 * final sync that pushes these changes out. 4707 */ 4708 if (new_state != POOL_STATE_UNINITIALIZED && !hardforce) { 4709 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4710 spa->spa_state = new_state; 4711 spa->spa_final_txg = spa_last_synced_txg(spa) + 4712 TXG_DEFER_SIZE + 1; 4713 vdev_config_dirty(spa->spa_root_vdev); 4714 spa_config_exit(spa, SCL_ALL, FTAG); 4715 } 4716 } 4717 4718 spa_event_notify(spa, NULL, ESC_ZFS_POOL_DESTROY); 4719 4720 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 4721 spa_unload(spa); 4722 spa_deactivate(spa); 4723 } 4724 4725 if (oldconfig && spa->spa_config) 4726 VERIFY(nvlist_dup(spa->spa_config, oldconfig, 0) == 0); 4727 4728 if (new_state != POOL_STATE_UNINITIALIZED) { 4729 if (!hardforce) 4730 spa_config_sync(spa, B_TRUE, B_TRUE); 4731 spa_remove(spa); 4732 } 4733 mutex_exit(&spa_namespace_lock); 4734 4735 return (0); 4736} 4737 4738/* 4739 * Destroy a storage pool. 4740 */ 4741int 4742spa_destroy(char *pool) 4743{ 4744 return (spa_export_common(pool, POOL_STATE_DESTROYED, NULL, 4745 B_FALSE, B_FALSE)); 4746} 4747 4748/* 4749 * Export a storage pool. 4750 */ 4751int 4752spa_export(char *pool, nvlist_t **oldconfig, boolean_t force, 4753 boolean_t hardforce) 4754{ 4755 return (spa_export_common(pool, POOL_STATE_EXPORTED, oldconfig, 4756 force, hardforce)); 4757} 4758 4759/* 4760 * Similar to spa_export(), this unloads the spa_t without actually removing it 4761 * from the namespace in any way. 4762 */ 4763int 4764spa_reset(char *pool) 4765{ 4766 return (spa_export_common(pool, POOL_STATE_UNINITIALIZED, NULL, 4767 B_FALSE, B_FALSE)); 4768} 4769 4770/* 4771 * ========================================================================== 4772 * Device manipulation 4773 * ========================================================================== 4774 */ 4775 4776/* 4777 * Add a device to a storage pool. 4778 */ 4779int 4780spa_vdev_add(spa_t *spa, nvlist_t *nvroot) 4781{ 4782 uint64_t txg, id; 4783 int error; 4784 vdev_t *rvd = spa->spa_root_vdev; 4785 vdev_t *vd, *tvd; 4786 nvlist_t **spares, **l2cache; 4787 uint_t nspares, nl2cache; 4788 4789 ASSERT(spa_writeable(spa)); 4790 4791 txg = spa_vdev_enter(spa); 4792 4793 if ((error = spa_config_parse(spa, &vd, nvroot, NULL, 0, 4794 VDEV_ALLOC_ADD)) != 0) 4795 return (spa_vdev_exit(spa, NULL, txg, error)); 4796 4797 spa->spa_pending_vdev = vd; /* spa_vdev_exit() will clear this */ 4798 4799 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, &spares, 4800 &nspares) != 0) 4801 nspares = 0; 4802 4803 if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, &l2cache, 4804 &nl2cache) != 0) 4805 nl2cache = 0; 4806 4807 if (vd->vdev_children == 0 && nspares == 0 && nl2cache == 0) 4808 return (spa_vdev_exit(spa, vd, txg, EINVAL)); 4809 4810 if (vd->vdev_children != 0 && 4811 (error = vdev_create(vd, txg, B_FALSE)) != 0) 4812 return (spa_vdev_exit(spa, vd, txg, error)); 4813 4814 /* 4815 * We must validate the spares and l2cache devices after checking the 4816 * children. Otherwise, vdev_inuse() will blindly overwrite the spare. 4817 */ 4818 if ((error = spa_validate_aux(spa, nvroot, txg, VDEV_ALLOC_ADD)) != 0) 4819 return (spa_vdev_exit(spa, vd, txg, error)); 4820 4821 /* 4822 * Transfer each new top-level vdev from vd to rvd. 4823 */ 4824 for (int c = 0; c < vd->vdev_children; c++) { 4825 4826 /* 4827 * Set the vdev id to the first hole, if one exists. 4828 */ 4829 for (id = 0; id < rvd->vdev_children; id++) { 4830 if (rvd->vdev_child[id]->vdev_ishole) { 4831 vdev_free(rvd->vdev_child[id]); 4832 break; 4833 } 4834 } 4835 tvd = vd->vdev_child[c]; 4836 vdev_remove_child(vd, tvd); 4837 tvd->vdev_id = id; 4838 vdev_add_child(rvd, tvd); 4839 vdev_config_dirty(tvd); 4840 } 4841 4842 if (nspares != 0) { 4843 spa_set_aux_vdevs(&spa->spa_spares, spares, nspares, 4844 ZPOOL_CONFIG_SPARES); 4845 spa_load_spares(spa); 4846 spa->spa_spares.sav_sync = B_TRUE; 4847 } 4848 4849 if (nl2cache != 0) { 4850 spa_set_aux_vdevs(&spa->spa_l2cache, l2cache, nl2cache, 4851 ZPOOL_CONFIG_L2CACHE); 4852 spa_load_l2cache(spa); 4853 spa->spa_l2cache.sav_sync = B_TRUE; 4854 } 4855 4856 /* 4857 * We have to be careful when adding new vdevs to an existing pool. 4858 * If other threads start allocating from these vdevs before we 4859 * sync the config cache, and we lose power, then upon reboot we may 4860 * fail to open the pool because there are DVAs that the config cache 4861 * can't translate. Therefore, we first add the vdevs without 4862 * initializing metaslabs; sync the config cache (via spa_vdev_exit()); 4863 * and then let spa_config_update() initialize the new metaslabs. 4864 * 4865 * spa_load() checks for added-but-not-initialized vdevs, so that 4866 * if we lose power at any point in this sequence, the remaining 4867 * steps will be completed the next time we load the pool. 4868 */ 4869 (void) spa_vdev_exit(spa, vd, txg, 0); 4870 4871 mutex_enter(&spa_namespace_lock); 4872 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 4873 spa_event_notify(spa, NULL, ESC_ZFS_VDEV_ADD); 4874 mutex_exit(&spa_namespace_lock); 4875 4876 return (0); 4877} 4878 4879/* 4880 * Attach a device to a mirror. The arguments are the path to any device 4881 * in the mirror, and the nvroot for the new device. If the path specifies 4882 * a device that is not mirrored, we automatically insert the mirror vdev. 4883 * 4884 * If 'replacing' is specified, the new device is intended to replace the 4885 * existing device; in this case the two devices are made into their own 4886 * mirror using the 'replacing' vdev, which is functionally identical to 4887 * the mirror vdev (it actually reuses all the same ops) but has a few 4888 * extra rules: you can't attach to it after it's been created, and upon 4889 * completion of resilvering, the first disk (the one being replaced) 4890 * is automatically detached. 4891 */ 4892int 4893spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing) 4894{ 4895 uint64_t txg, dtl_max_txg; 4896 vdev_t *rvd = spa->spa_root_vdev; 4897 vdev_t *oldvd, *newvd, *newrootvd, *pvd, *tvd; 4898 vdev_ops_t *pvops; 4899 char *oldvdpath, *newvdpath; 4900 int newvd_isspare; 4901 int error; 4902 4903 ASSERT(spa_writeable(spa)); 4904 4905 txg = spa_vdev_enter(spa); 4906 4907 oldvd = spa_lookup_by_guid(spa, guid, B_FALSE); 4908 4909 if (oldvd == NULL) 4910 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 4911 4912 if (!oldvd->vdev_ops->vdev_op_leaf) 4913 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 4914 4915 pvd = oldvd->vdev_parent; 4916 4917 if ((error = spa_config_parse(spa, &newrootvd, nvroot, NULL, 0, 4918 VDEV_ALLOC_ATTACH)) != 0) 4919 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 4920 4921 if (newrootvd->vdev_children != 1) 4922 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4923 4924 newvd = newrootvd->vdev_child[0]; 4925 4926 if (!newvd->vdev_ops->vdev_op_leaf) 4927 return (spa_vdev_exit(spa, newrootvd, txg, EINVAL)); 4928 4929 if ((error = vdev_create(newrootvd, txg, replacing)) != 0) 4930 return (spa_vdev_exit(spa, newrootvd, txg, error)); 4931 4932 /* 4933 * Spares can't replace logs 4934 */ 4935 if (oldvd->vdev_top->vdev_islog && newvd->vdev_isspare) 4936 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4937 4938 if (!replacing) { 4939 /* 4940 * For attach, the only allowable parent is a mirror or the root 4941 * vdev. 4942 */ 4943 if (pvd->vdev_ops != &vdev_mirror_ops && 4944 pvd->vdev_ops != &vdev_root_ops) 4945 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4946 4947 pvops = &vdev_mirror_ops; 4948 } else { 4949 /* 4950 * Active hot spares can only be replaced by inactive hot 4951 * spares. 4952 */ 4953 if (pvd->vdev_ops == &vdev_spare_ops && 4954 oldvd->vdev_isspare && 4955 !spa_has_spare(spa, newvd->vdev_guid)) 4956 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4957 4958 /* 4959 * If the source is a hot spare, and the parent isn't already a 4960 * spare, then we want to create a new hot spare. Otherwise, we 4961 * want to create a replacing vdev. The user is not allowed to 4962 * attach to a spared vdev child unless the 'isspare' state is 4963 * the same (spare replaces spare, non-spare replaces 4964 * non-spare). 4965 */ 4966 if (pvd->vdev_ops == &vdev_replacing_ops && 4967 spa_version(spa) < SPA_VERSION_MULTI_REPLACE) { 4968 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4969 } else if (pvd->vdev_ops == &vdev_spare_ops && 4970 newvd->vdev_isspare != oldvd->vdev_isspare) { 4971 return (spa_vdev_exit(spa, newrootvd, txg, ENOTSUP)); 4972 } 4973 4974 if (newvd->vdev_isspare) 4975 pvops = &vdev_spare_ops; 4976 else 4977 pvops = &vdev_replacing_ops; 4978 } 4979 4980 /* 4981 * Make sure the new device is big enough. 4982 */ 4983 if (newvd->vdev_asize < vdev_get_min_asize(oldvd)) 4984 return (spa_vdev_exit(spa, newrootvd, txg, EOVERFLOW)); 4985 4986 /* 4987 * The new device cannot have a higher alignment requirement 4988 * than the top-level vdev. 4989 */ 4990 if (newvd->vdev_ashift > oldvd->vdev_top->vdev_ashift) 4991 return (spa_vdev_exit(spa, newrootvd, txg, EDOM)); 4992 4993 /* 4994 * If this is an in-place replacement, update oldvd's path and devid 4995 * to make it distinguishable from newvd, and unopenable from now on. 4996 */ 4997 if (strcmp(oldvd->vdev_path, newvd->vdev_path) == 0) { 4998 spa_strfree(oldvd->vdev_path); 4999 oldvd->vdev_path = kmem_alloc(strlen(newvd->vdev_path) + 5, 5000 KM_SLEEP); 5001 (void) sprintf(oldvd->vdev_path, "%s/%s", 5002 newvd->vdev_path, "old"); 5003 if (oldvd->vdev_devid != NULL) { 5004 spa_strfree(oldvd->vdev_devid); 5005 oldvd->vdev_devid = NULL; 5006 } 5007 } 5008 5009 /* mark the device being resilvered */ 5010 newvd->vdev_resilver_txg = txg; 5011 5012 /* 5013 * If the parent is not a mirror, or if we're replacing, insert the new 5014 * mirror/replacing/spare vdev above oldvd. 5015 */ 5016 if (pvd->vdev_ops != pvops) 5017 pvd = vdev_add_parent(oldvd, pvops); 5018 5019 ASSERT(pvd->vdev_top->vdev_parent == rvd); 5020 ASSERT(pvd->vdev_ops == pvops); 5021 ASSERT(oldvd->vdev_parent == pvd); 5022 5023 /* 5024 * Extract the new device from its root and add it to pvd. 5025 */ 5026 vdev_remove_child(newrootvd, newvd); 5027 newvd->vdev_id = pvd->vdev_children; 5028 newvd->vdev_crtxg = oldvd->vdev_crtxg; 5029 vdev_add_child(pvd, newvd); 5030 5031 tvd = newvd->vdev_top; 5032 ASSERT(pvd->vdev_top == tvd); 5033 ASSERT(tvd->vdev_parent == rvd); 5034 5035 vdev_config_dirty(tvd); 5036 5037 /* 5038 * Set newvd's DTL to [TXG_INITIAL, dtl_max_txg) so that we account 5039 * for any dmu_sync-ed blocks. It will propagate upward when 5040 * spa_vdev_exit() calls vdev_dtl_reassess(). 5041 */ 5042 dtl_max_txg = txg + TXG_CONCURRENT_STATES; 5043 5044 vdev_dtl_dirty(newvd, DTL_MISSING, TXG_INITIAL, 5045 dtl_max_txg - TXG_INITIAL); 5046 5047 if (newvd->vdev_isspare) { 5048 spa_spare_activate(newvd); 5049 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_SPARE); 5050 } 5051 5052 oldvdpath = spa_strdup(oldvd->vdev_path); 5053 newvdpath = spa_strdup(newvd->vdev_path); 5054 newvd_isspare = newvd->vdev_isspare; 5055 5056 /* 5057 * Mark newvd's DTL dirty in this txg. 5058 */ 5059 vdev_dirty(tvd, VDD_DTL, newvd, txg); 5060 5061 /* 5062 * Schedule the resilver to restart in the future. We do this to 5063 * ensure that dmu_sync-ed blocks have been stitched into the 5064 * respective datasets. 5065 */ 5066 dsl_resilver_restart(spa->spa_dsl_pool, dtl_max_txg); 5067 5068 if (spa->spa_bootfs) 5069 spa_event_notify(spa, newvd, ESC_ZFS_BOOTFS_VDEV_ATTACH); 5070 5071 spa_event_notify(spa, newvd, ESC_ZFS_VDEV_ATTACH); 5072 5073 /* 5074 * Commit the config 5075 */ 5076 (void) spa_vdev_exit(spa, newrootvd, dtl_max_txg, 0); 5077 5078 spa_history_log_internal(spa, "vdev attach", NULL, 5079 "%s vdev=%s %s vdev=%s", 5080 replacing && newvd_isspare ? "spare in" : 5081 replacing ? "replace" : "attach", newvdpath, 5082 replacing ? "for" : "to", oldvdpath); 5083 5084 spa_strfree(oldvdpath); 5085 spa_strfree(newvdpath); 5086 5087 return (0); 5088} 5089 5090/* 5091 * Detach a device from a mirror or replacing vdev. 5092 * 5093 * If 'replace_done' is specified, only detach if the parent 5094 * is a replacing vdev. 5095 */ 5096int 5097spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done) 5098{ 5099 uint64_t txg; 5100 int error; 5101 vdev_t *rvd = spa->spa_root_vdev; 5102 vdev_t *vd, *pvd, *cvd, *tvd; 5103 boolean_t unspare = B_FALSE; 5104 uint64_t unspare_guid = 0; 5105 char *vdpath; 5106 5107 ASSERT(spa_writeable(spa)); 5108 5109 txg = spa_vdev_enter(spa); 5110 5111 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 5112 5113 if (vd == NULL) 5114 return (spa_vdev_exit(spa, NULL, txg, ENODEV)); 5115 5116 if (!vd->vdev_ops->vdev_op_leaf) 5117 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 5118 5119 pvd = vd->vdev_parent; 5120 5121 /* 5122 * If the parent/child relationship is not as expected, don't do it. 5123 * Consider M(A,R(B,C)) -- that is, a mirror of A with a replacing 5124 * vdev that's replacing B with C. The user's intent in replacing 5125 * is to go from M(A,B) to M(A,C). If the user decides to cancel 5126 * the replace by detaching C, the expected behavior is to end up 5127 * M(A,B). But suppose that right after deciding to detach C, 5128 * the replacement of B completes. We would have M(A,C), and then 5129 * ask to detach C, which would leave us with just A -- not what 5130 * the user wanted. To prevent this, we make sure that the 5131 * parent/child relationship hasn't changed -- in this example, 5132 * that C's parent is still the replacing vdev R. 5133 */ 5134 if (pvd->vdev_guid != pguid && pguid != 0) 5135 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 5136 5137 /* 5138 * Only 'replacing' or 'spare' vdevs can be replaced. 5139 */ 5140 if (replace_done && pvd->vdev_ops != &vdev_replacing_ops && 5141 pvd->vdev_ops != &vdev_spare_ops) 5142 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 5143 5144 ASSERT(pvd->vdev_ops != &vdev_spare_ops || 5145 spa_version(spa) >= SPA_VERSION_SPARES); 5146 5147 /* 5148 * Only mirror, replacing, and spare vdevs support detach. 5149 */ 5150 if (pvd->vdev_ops != &vdev_replacing_ops && 5151 pvd->vdev_ops != &vdev_mirror_ops && 5152 pvd->vdev_ops != &vdev_spare_ops) 5153 return (spa_vdev_exit(spa, NULL, txg, ENOTSUP)); 5154 5155 /* 5156 * If this device has the only valid copy of some data, 5157 * we cannot safely detach it. 5158 */ 5159 if (vdev_dtl_required(vd)) 5160 return (spa_vdev_exit(spa, NULL, txg, EBUSY)); 5161 5162 ASSERT(pvd->vdev_children >= 2); 5163 5164 /* 5165 * If we are detaching the second disk from a replacing vdev, then 5166 * check to see if we changed the original vdev's path to have "/old" 5167 * at the end in spa_vdev_attach(). If so, undo that change now. 5168 */ 5169 if (pvd->vdev_ops == &vdev_replacing_ops && vd->vdev_id > 0 && 5170 vd->vdev_path != NULL) { 5171 size_t len = strlen(vd->vdev_path); 5172 5173 for (int c = 0; c < pvd->vdev_children; c++) { 5174 cvd = pvd->vdev_child[c]; 5175 5176 if (cvd == vd || cvd->vdev_path == NULL) 5177 continue; 5178 5179 if (strncmp(cvd->vdev_path, vd->vdev_path, len) == 0 && 5180 strcmp(cvd->vdev_path + len, "/old") == 0) { 5181 spa_strfree(cvd->vdev_path); 5182 cvd->vdev_path = spa_strdup(vd->vdev_path); 5183 break; 5184 } 5185 } 5186 } 5187 5188 /* 5189 * If we are detaching the original disk from a spare, then it implies 5190 * that the spare should become a real disk, and be removed from the 5191 * active spare list for the pool. 5192 */ 5193 if (pvd->vdev_ops == &vdev_spare_ops && 5194 vd->vdev_id == 0 && 5195 pvd->vdev_child[pvd->vdev_children - 1]->vdev_isspare) 5196 unspare = B_TRUE; 5197 5198 /* 5199 * Erase the disk labels so the disk can be used for other things. 5200 * This must be done after all other error cases are handled, 5201 * but before we disembowel vd (so we can still do I/O to it). 5202 * But if we can't do it, don't treat the error as fatal -- 5203 * it may be that the unwritability of the disk is the reason 5204 * it's being detached! 5205 */ 5206 error = vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 5207 5208 /* 5209 * Remove vd from its parent and compact the parent's children. 5210 */ 5211 vdev_remove_child(pvd, vd); 5212 vdev_compact_children(pvd); 5213 5214 /* 5215 * Remember one of the remaining children so we can get tvd below. 5216 */ 5217 cvd = pvd->vdev_child[pvd->vdev_children - 1]; 5218 5219 /* 5220 * If we need to remove the remaining child from the list of hot spares, 5221 * do it now, marking the vdev as no longer a spare in the process. 5222 * We must do this before vdev_remove_parent(), because that can 5223 * change the GUID if it creates a new toplevel GUID. For a similar 5224 * reason, we must remove the spare now, in the same txg as the detach; 5225 * otherwise someone could attach a new sibling, change the GUID, and 5226 * the subsequent attempt to spa_vdev_remove(unspare_guid) would fail. 5227 */ 5228 if (unspare) { 5229 ASSERT(cvd->vdev_isspare); 5230 spa_spare_remove(cvd); 5231 unspare_guid = cvd->vdev_guid; 5232 (void) spa_vdev_remove(spa, unspare_guid, B_TRUE); 5233 cvd->vdev_unspare = B_TRUE; 5234 } 5235 5236 /* 5237 * If the parent mirror/replacing vdev only has one child, 5238 * the parent is no longer needed. Remove it from the tree. 5239 */ 5240 if (pvd->vdev_children == 1) { 5241 if (pvd->vdev_ops == &vdev_spare_ops) 5242 cvd->vdev_unspare = B_FALSE; 5243 vdev_remove_parent(cvd); 5244 } 5245 5246 5247 /* 5248 * We don't set tvd until now because the parent we just removed 5249 * may have been the previous top-level vdev. 5250 */ 5251 tvd = cvd->vdev_top; 5252 ASSERT(tvd->vdev_parent == rvd); 5253 5254 /* 5255 * Reevaluate the parent vdev state. 5256 */ 5257 vdev_propagate_state(cvd); 5258 5259 /* 5260 * If the 'autoexpand' property is set on the pool then automatically 5261 * try to expand the size of the pool. For example if the device we 5262 * just detached was smaller than the others, it may be possible to 5263 * add metaslabs (i.e. grow the pool). We need to reopen the vdev 5264 * first so that we can obtain the updated sizes of the leaf vdevs. 5265 */ 5266 if (spa->spa_autoexpand) { 5267 vdev_reopen(tvd); 5268 vdev_expand(tvd, txg); 5269 } 5270 5271 vdev_config_dirty(tvd); 5272 5273 /* 5274 * Mark vd's DTL as dirty in this txg. vdev_dtl_sync() will see that 5275 * vd->vdev_detached is set and free vd's DTL object in syncing context. 5276 * But first make sure we're not on any *other* txg's DTL list, to 5277 * prevent vd from being accessed after it's freed. 5278 */ 5279 vdpath = spa_strdup(vd->vdev_path); 5280 for (int t = 0; t < TXG_SIZE; t++) 5281 (void) txg_list_remove_this(&tvd->vdev_dtl_list, vd, t); 5282 vd->vdev_detached = B_TRUE; 5283 vdev_dirty(tvd, VDD_DTL, vd, txg); 5284 5285 spa_event_notify(spa, vd, ESC_ZFS_VDEV_REMOVE); 5286 5287 /* hang on to the spa before we release the lock */ 5288 spa_open_ref(spa, FTAG); 5289 5290 error = spa_vdev_exit(spa, vd, txg, 0); 5291 5292 spa_history_log_internal(spa, "detach", NULL, 5293 "vdev=%s", vdpath); 5294 spa_strfree(vdpath); 5295 5296 /* 5297 * If this was the removal of the original device in a hot spare vdev, 5298 * then we want to go through and remove the device from the hot spare 5299 * list of every other pool. 5300 */ 5301 if (unspare) { 5302 spa_t *altspa = NULL; 5303 5304 mutex_enter(&spa_namespace_lock); 5305 while ((altspa = spa_next(altspa)) != NULL) { 5306 if (altspa->spa_state != POOL_STATE_ACTIVE || 5307 altspa == spa) 5308 continue; 5309 5310 spa_open_ref(altspa, FTAG); 5311 mutex_exit(&spa_namespace_lock); 5312 (void) spa_vdev_remove(altspa, unspare_guid, B_TRUE); 5313 mutex_enter(&spa_namespace_lock); 5314 spa_close(altspa, FTAG); 5315 } 5316 mutex_exit(&spa_namespace_lock); 5317 5318 /* search the rest of the vdevs for spares to remove */ 5319 spa_vdev_resilver_done(spa); 5320 } 5321 5322 /* all done with the spa; OK to release */ 5323 mutex_enter(&spa_namespace_lock); 5324 spa_close(spa, FTAG); 5325 mutex_exit(&spa_namespace_lock); 5326 5327 return (error); 5328} 5329 5330/* 5331 * Split a set of devices from their mirrors, and create a new pool from them. 5332 */ 5333int 5334spa_vdev_split_mirror(spa_t *spa, char *newname, nvlist_t *config, 5335 nvlist_t *props, boolean_t exp) 5336{ 5337 int error = 0; 5338 uint64_t txg, *glist; 5339 spa_t *newspa; 5340 uint_t c, children, lastlog; 5341 nvlist_t **child, *nvl, *tmp; 5342 dmu_tx_t *tx; 5343 char *altroot = NULL; 5344 vdev_t *rvd, **vml = NULL; /* vdev modify list */ 5345 boolean_t activate_slog; 5346 5347 ASSERT(spa_writeable(spa)); 5348 5349 txg = spa_vdev_enter(spa); 5350 5351 /* clear the log and flush everything up to now */ 5352 activate_slog = spa_passivate_log(spa); 5353 (void) spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5354 error = spa_offline_log(spa); 5355 txg = spa_vdev_config_enter(spa); 5356 5357 if (activate_slog) 5358 spa_activate_log(spa); 5359 5360 if (error != 0) 5361 return (spa_vdev_exit(spa, NULL, txg, error)); 5362 5363 /* check new spa name before going any further */ 5364 if (spa_lookup(newname) != NULL) 5365 return (spa_vdev_exit(spa, NULL, txg, EEXIST)); 5366 5367 /* 5368 * scan through all the children to ensure they're all mirrors 5369 */ 5370 if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvl) != 0 || 5371 nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, &child, 5372 &children) != 0) 5373 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5374 5375 /* first, check to ensure we've got the right child count */ 5376 rvd = spa->spa_root_vdev; 5377 lastlog = 0; 5378 for (c = 0; c < rvd->vdev_children; c++) { 5379 vdev_t *vd = rvd->vdev_child[c]; 5380 5381 /* don't count the holes & logs as children */ 5382 if (vd->vdev_islog || vd->vdev_ishole) { 5383 if (lastlog == 0) 5384 lastlog = c; 5385 continue; 5386 } 5387 5388 lastlog = 0; 5389 } 5390 if (children != (lastlog != 0 ? lastlog : rvd->vdev_children)) 5391 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5392 5393 /* next, ensure no spare or cache devices are part of the split */ 5394 if (nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_SPARES, &tmp) == 0 || 5395 nvlist_lookup_nvlist(nvl, ZPOOL_CONFIG_L2CACHE, &tmp) == 0) 5396 return (spa_vdev_exit(spa, NULL, txg, EINVAL)); 5397 5398 vml = kmem_zalloc(children * sizeof (vdev_t *), KM_SLEEP); 5399 glist = kmem_zalloc(children * sizeof (uint64_t), KM_SLEEP); 5400 5401 /* then, loop over each vdev and validate it */ 5402 for (c = 0; c < children; c++) { 5403 uint64_t is_hole = 0; 5404 5405 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_HOLE, 5406 &is_hole); 5407 5408 if (is_hole != 0) { 5409 if (spa->spa_root_vdev->vdev_child[c]->vdev_ishole || 5410 spa->spa_root_vdev->vdev_child[c]->vdev_islog) { 5411 continue; 5412 } else { 5413 error = SET_ERROR(EINVAL); 5414 break; 5415 } 5416 } 5417 5418 /* which disk is going to be split? */ 5419 if (nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_GUID, 5420 &glist[c]) != 0) { 5421 error = SET_ERROR(EINVAL); 5422 break; 5423 } 5424 5425 /* look it up in the spa */ 5426 vml[c] = spa_lookup_by_guid(spa, glist[c], B_FALSE); 5427 if (vml[c] == NULL) { 5428 error = SET_ERROR(ENODEV); 5429 break; 5430 } 5431 5432 /* make sure there's nothing stopping the split */ 5433 if (vml[c]->vdev_parent->vdev_ops != &vdev_mirror_ops || 5434 vml[c]->vdev_islog || 5435 vml[c]->vdev_ishole || 5436 vml[c]->vdev_isspare || 5437 vml[c]->vdev_isl2cache || 5438 !vdev_writeable(vml[c]) || 5439 vml[c]->vdev_children != 0 || 5440 vml[c]->vdev_state != VDEV_STATE_HEALTHY || 5441 c != spa->spa_root_vdev->vdev_child[c]->vdev_id) { 5442 error = SET_ERROR(EINVAL); 5443 break; 5444 } 5445 5446 if (vdev_dtl_required(vml[c])) { 5447 error = SET_ERROR(EBUSY); 5448 break; 5449 } 5450 5451 /* we need certain info from the top level */ 5452 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_ARRAY, 5453 vml[c]->vdev_top->vdev_ms_array) == 0); 5454 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_METASLAB_SHIFT, 5455 vml[c]->vdev_top->vdev_ms_shift) == 0); 5456 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASIZE, 5457 vml[c]->vdev_top->vdev_asize) == 0); 5458 VERIFY(nvlist_add_uint64(child[c], ZPOOL_CONFIG_ASHIFT, 5459 vml[c]->vdev_top->vdev_ashift) == 0); 5460 5461 /* transfer per-vdev ZAPs */ 5462 ASSERT3U(vml[c]->vdev_leaf_zap, !=, 0); 5463 VERIFY0(nvlist_add_uint64(child[c], 5464 ZPOOL_CONFIG_VDEV_LEAF_ZAP, vml[c]->vdev_leaf_zap)); 5465 5466 ASSERT3U(vml[c]->vdev_top->vdev_top_zap, !=, 0); 5467 VERIFY0(nvlist_add_uint64(child[c], 5468 ZPOOL_CONFIG_VDEV_TOP_ZAP, 5469 vml[c]->vdev_parent->vdev_top_zap)); 5470 } 5471 5472 if (error != 0) { 5473 kmem_free(vml, children * sizeof (vdev_t *)); 5474 kmem_free(glist, children * sizeof (uint64_t)); 5475 return (spa_vdev_exit(spa, NULL, txg, error)); 5476 } 5477 5478 /* stop writers from using the disks */ 5479 for (c = 0; c < children; c++) { 5480 if (vml[c] != NULL) 5481 vml[c]->vdev_offline = B_TRUE; 5482 } 5483 vdev_reopen(spa->spa_root_vdev); 5484 5485 /* 5486 * Temporarily record the splitting vdevs in the spa config. This 5487 * will disappear once the config is regenerated. 5488 */ 5489 VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, KM_SLEEP) == 0); 5490 VERIFY(nvlist_add_uint64_array(nvl, ZPOOL_CONFIG_SPLIT_LIST, 5491 glist, children) == 0); 5492 kmem_free(glist, children * sizeof (uint64_t)); 5493 5494 mutex_enter(&spa->spa_props_lock); 5495 VERIFY(nvlist_add_nvlist(spa->spa_config, ZPOOL_CONFIG_SPLIT, 5496 nvl) == 0); 5497 mutex_exit(&spa->spa_props_lock); 5498 spa->spa_config_splitting = nvl; 5499 vdev_config_dirty(spa->spa_root_vdev); 5500 5501 /* configure and create the new pool */ 5502 VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, newname) == 0); 5503 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 5504 exp ? POOL_STATE_EXPORTED : POOL_STATE_ACTIVE) == 0); 5505 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 5506 spa_version(spa)) == 0); 5507 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 5508 spa->spa_config_txg) == 0); 5509 VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 5510 spa_generate_guid(NULL)) == 0); 5511 VERIFY0(nvlist_add_boolean(config, ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS)); 5512 (void) nvlist_lookup_string(props, 5513 zpool_prop_to_name(ZPOOL_PROP_ALTROOT), &altroot); 5514 5515 /* add the new pool to the namespace */ 5516 newspa = spa_add(newname, config, altroot); 5517 newspa->spa_avz_action = AVZ_ACTION_REBUILD; 5518 newspa->spa_config_txg = spa->spa_config_txg; 5519 spa_set_log_state(newspa, SPA_LOG_CLEAR); 5520 5521 /* release the spa config lock, retaining the namespace lock */ 5522 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5523 5524 if (zio_injection_enabled) 5525 zio_handle_panic_injection(spa, FTAG, 1); 5526 5527 spa_activate(newspa, spa_mode_global); 5528 spa_async_suspend(newspa); 5529 5530#ifndef illumos 5531 /* mark that we are creating new spa by splitting */ 5532 newspa->spa_splitting_newspa = B_TRUE; 5533#endif 5534 /* create the new pool from the disks of the original pool */ 5535 error = spa_load(newspa, SPA_LOAD_IMPORT, SPA_IMPORT_ASSEMBLE, B_TRUE); 5536#ifndef illumos 5537 newspa->spa_splitting_newspa = B_FALSE; 5538#endif 5539 if (error) 5540 goto out; 5541 5542 /* if that worked, generate a real config for the new pool */ 5543 if (newspa->spa_root_vdev != NULL) { 5544 VERIFY(nvlist_alloc(&newspa->spa_config_splitting, 5545 NV_UNIQUE_NAME, KM_SLEEP) == 0); 5546 VERIFY(nvlist_add_uint64(newspa->spa_config_splitting, 5547 ZPOOL_CONFIG_SPLIT_GUID, spa_guid(spa)) == 0); 5548 spa_config_set(newspa, spa_config_generate(newspa, NULL, -1ULL, 5549 B_TRUE)); 5550 } 5551 5552 /* set the props */ 5553 if (props != NULL) { 5554 spa_configfile_set(newspa, props, B_FALSE); 5555 error = spa_prop_set(newspa, props); 5556 if (error) 5557 goto out; 5558 } 5559 5560 /* flush everything */ 5561 txg = spa_vdev_config_enter(newspa); 5562 vdev_config_dirty(newspa->spa_root_vdev); 5563 (void) spa_vdev_config_exit(newspa, NULL, txg, 0, FTAG); 5564 5565 if (zio_injection_enabled) 5566 zio_handle_panic_injection(spa, FTAG, 2); 5567 5568 spa_async_resume(newspa); 5569 5570 /* finally, update the original pool's config */ 5571 txg = spa_vdev_config_enter(spa); 5572 tx = dmu_tx_create_dd(spa_get_dsl(spa)->dp_mos_dir); 5573 error = dmu_tx_assign(tx, TXG_WAIT); 5574 if (error != 0) 5575 dmu_tx_abort(tx); 5576 for (c = 0; c < children; c++) { 5577 if (vml[c] != NULL) { 5578 vdev_split(vml[c]); 5579 if (error == 0) 5580 spa_history_log_internal(spa, "detach", tx, 5581 "vdev=%s", vml[c]->vdev_path); 5582 5583 vdev_free(vml[c]); 5584 } 5585 } 5586 spa->spa_avz_action = AVZ_ACTION_REBUILD; 5587 vdev_config_dirty(spa->spa_root_vdev); 5588 spa->spa_config_splitting = NULL; 5589 nvlist_free(nvl); 5590 if (error == 0) 5591 dmu_tx_commit(tx); 5592 (void) spa_vdev_exit(spa, NULL, txg, 0); 5593 5594 if (zio_injection_enabled) 5595 zio_handle_panic_injection(spa, FTAG, 3); 5596 5597 /* split is complete; log a history record */ 5598 spa_history_log_internal(newspa, "split", NULL, 5599 "from pool %s", spa_name(spa)); 5600 5601 kmem_free(vml, children * sizeof (vdev_t *)); 5602 5603 /* if we're not going to mount the filesystems in userland, export */ 5604 if (exp) 5605 error = spa_export_common(newname, POOL_STATE_EXPORTED, NULL, 5606 B_FALSE, B_FALSE); 5607 5608 return (error); 5609 5610out: 5611 spa_unload(newspa); 5612 spa_deactivate(newspa); 5613 spa_remove(newspa); 5614 5615 txg = spa_vdev_config_enter(spa); 5616 5617 /* re-online all offlined disks */ 5618 for (c = 0; c < children; c++) { 5619 if (vml[c] != NULL) 5620 vml[c]->vdev_offline = B_FALSE; 5621 } 5622 vdev_reopen(spa->spa_root_vdev); 5623 5624 nvlist_free(spa->spa_config_splitting); 5625 spa->spa_config_splitting = NULL; 5626 (void) spa_vdev_exit(spa, NULL, txg, error); 5627 5628 kmem_free(vml, children * sizeof (vdev_t *)); 5629 return (error); 5630} 5631 5632static nvlist_t * 5633spa_nvlist_lookup_by_guid(nvlist_t **nvpp, int count, uint64_t target_guid) 5634{ 5635 for (int i = 0; i < count; i++) { 5636 uint64_t guid; 5637 5638 VERIFY(nvlist_lookup_uint64(nvpp[i], ZPOOL_CONFIG_GUID, 5639 &guid) == 0); 5640 5641 if (guid == target_guid) 5642 return (nvpp[i]); 5643 } 5644 5645 return (NULL); 5646} 5647 5648static void 5649spa_vdev_remove_aux(nvlist_t *config, char *name, nvlist_t **dev, int count, 5650 nvlist_t *dev_to_remove) 5651{ 5652 nvlist_t **newdev = NULL; 5653 5654 if (count > 1) 5655 newdev = kmem_alloc((count - 1) * sizeof (void *), KM_SLEEP); 5656 5657 for (int i = 0, j = 0; i < count; i++) { 5658 if (dev[i] == dev_to_remove) 5659 continue; 5660 VERIFY(nvlist_dup(dev[i], &newdev[j++], KM_SLEEP) == 0); 5661 } 5662 5663 VERIFY(nvlist_remove(config, name, DATA_TYPE_NVLIST_ARRAY) == 0); 5664 VERIFY(nvlist_add_nvlist_array(config, name, newdev, count - 1) == 0); 5665 5666 for (int i = 0; i < count - 1; i++) 5667 nvlist_free(newdev[i]); 5668 5669 if (count > 1) 5670 kmem_free(newdev, (count - 1) * sizeof (void *)); 5671} 5672 5673/* 5674 * Evacuate the device. 5675 */ 5676static int 5677spa_vdev_remove_evacuate(spa_t *spa, vdev_t *vd) 5678{ 5679 uint64_t txg; 5680 int error = 0; 5681 5682 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5683 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 5684 ASSERT(vd == vd->vdev_top); 5685 5686 /* 5687 * Evacuate the device. We don't hold the config lock as writer 5688 * since we need to do I/O but we do keep the 5689 * spa_namespace_lock held. Once this completes the device 5690 * should no longer have any blocks allocated on it. 5691 */ 5692 if (vd->vdev_islog) { 5693 if (vd->vdev_stat.vs_alloc != 0) 5694 error = spa_offline_log(spa); 5695 } else { 5696 error = SET_ERROR(ENOTSUP); 5697 } 5698 5699 if (error) 5700 return (error); 5701 5702 /* 5703 * The evacuation succeeded. Remove any remaining MOS metadata 5704 * associated with this vdev, and wait for these changes to sync. 5705 */ 5706 ASSERT0(vd->vdev_stat.vs_alloc); 5707 txg = spa_vdev_config_enter(spa); 5708 vd->vdev_removing = B_TRUE; 5709 vdev_dirty_leaves(vd, VDD_DTL, txg); 5710 vdev_config_dirty(vd); 5711 spa_vdev_config_exit(spa, NULL, txg, 0, FTAG); 5712 5713 return (0); 5714} 5715 5716/* 5717 * Complete the removal by cleaning up the namespace. 5718 */ 5719static void 5720spa_vdev_remove_from_namespace(spa_t *spa, vdev_t *vd) 5721{ 5722 vdev_t *rvd = spa->spa_root_vdev; 5723 uint64_t id = vd->vdev_id; 5724 boolean_t last_vdev = (id == (rvd->vdev_children - 1)); 5725 5726 ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5727 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == SCL_ALL); 5728 ASSERT(vd == vd->vdev_top); 5729 5730 /* 5731 * Only remove any devices which are empty. 5732 */ 5733 if (vd->vdev_stat.vs_alloc != 0) 5734 return; 5735 5736 (void) vdev_label_init(vd, 0, VDEV_LABEL_REMOVE); 5737 5738 if (list_link_active(&vd->vdev_state_dirty_node)) 5739 vdev_state_clean(vd); 5740 if (list_link_active(&vd->vdev_config_dirty_node)) 5741 vdev_config_clean(vd); 5742 5743 vdev_free(vd); 5744 5745 if (last_vdev) { 5746 vdev_compact_children(rvd); 5747 } else { 5748 vd = vdev_alloc_common(spa, id, 0, &vdev_hole_ops); 5749 vdev_add_child(rvd, vd); 5750 } 5751 vdev_config_dirty(rvd); 5752 5753 /* 5754 * Reassess the health of our root vdev. 5755 */ 5756 vdev_reopen(rvd); 5757} 5758 5759/* 5760 * Remove a device from the pool - 5761 * 5762 * Removing a device from the vdev namespace requires several steps 5763 * and can take a significant amount of time. As a result we use 5764 * the spa_vdev_config_[enter/exit] functions which allow us to 5765 * grab and release the spa_config_lock while still holding the namespace 5766 * lock. During each step the configuration is synced out. 5767 * 5768 * Currently, this supports removing only hot spares, slogs, and level 2 ARC 5769 * devices. 5770 */ 5771int 5772spa_vdev_remove(spa_t *spa, uint64_t guid, boolean_t unspare) 5773{ 5774 vdev_t *vd; 5775 sysevent_t *ev = NULL; 5776 metaslab_group_t *mg; 5777 nvlist_t **spares, **l2cache, *nv; 5778 uint64_t txg = 0; 5779 uint_t nspares, nl2cache; 5780 int error = 0; 5781 boolean_t locked = MUTEX_HELD(&spa_namespace_lock); 5782 5783 ASSERT(spa_writeable(spa)); 5784 5785 if (!locked) 5786 txg = spa_vdev_enter(spa); 5787 5788 vd = spa_lookup_by_guid(spa, guid, B_FALSE); 5789 5790 if (spa->spa_spares.sav_vdevs != NULL && 5791 nvlist_lookup_nvlist_array(spa->spa_spares.sav_config, 5792 ZPOOL_CONFIG_SPARES, &spares, &nspares) == 0 && 5793 (nv = spa_nvlist_lookup_by_guid(spares, nspares, guid)) != NULL) { 5794 /* 5795 * Only remove the hot spare if it's not currently in use 5796 * in this pool. 5797 */ 5798 if (vd == NULL || unspare) { 5799 if (vd == NULL) 5800 vd = spa_lookup_by_guid(spa, guid, B_TRUE); 5801 ev = spa_event_create(spa, vd, ESC_ZFS_VDEV_REMOVE_AUX); 5802 spa_vdev_remove_aux(spa->spa_spares.sav_config, 5803 ZPOOL_CONFIG_SPARES, spares, nspares, nv); 5804 spa_load_spares(spa); 5805 spa->spa_spares.sav_sync = B_TRUE; 5806 } else { 5807 error = SET_ERROR(EBUSY); 5808 } 5809 } else if (spa->spa_l2cache.sav_vdevs != NULL && 5810 nvlist_lookup_nvlist_array(spa->spa_l2cache.sav_config, 5811 ZPOOL_CONFIG_L2CACHE, &l2cache, &nl2cache) == 0 && 5812 (nv = spa_nvlist_lookup_by_guid(l2cache, nl2cache, guid)) != NULL) { 5813 /* 5814 * Cache devices can always be removed. 5815 */ 5816 vd = spa_lookup_by_guid(spa, guid, B_TRUE); 5817 ev = spa_event_create(spa, vd, ESC_ZFS_VDEV_REMOVE_AUX); 5818 spa_vdev_remove_aux(spa->spa_l2cache.sav_config, 5819 ZPOOL_CONFIG_L2CACHE, l2cache, nl2cache, nv); 5820 spa_load_l2cache(spa); 5821 spa->spa_l2cache.sav_sync = B_TRUE; 5822 } else if (vd != NULL && vd->vdev_islog) { 5823 ASSERT(!locked); 5824 ASSERT(vd == vd->vdev_top); 5825 5826 mg = vd->vdev_mg; 5827 5828 /* 5829 * Stop allocating from this vdev. 5830 */ 5831 metaslab_group_passivate(mg); 5832 5833 /* 5834 * Wait for the youngest allocations and frees to sync, 5835 * and then wait for the deferral of those frees to finish. 5836 */ 5837 spa_vdev_config_exit(spa, NULL, 5838 txg + TXG_CONCURRENT_STATES + TXG_DEFER_SIZE, 0, FTAG); 5839 5840 /* 5841 * Attempt to evacuate the vdev. 5842 */ 5843 error = spa_vdev_remove_evacuate(spa, vd); 5844 5845 txg = spa_vdev_config_enter(spa); 5846 5847 /* 5848 * If we couldn't evacuate the vdev, unwind. 5849 */ 5850 if (error) { 5851 metaslab_group_activate(mg); 5852 return (spa_vdev_exit(spa, NULL, txg, error)); 5853 } 5854 5855 /* 5856 * Clean up the vdev namespace. 5857 */ 5858 ev = spa_event_create(spa, vd, ESC_ZFS_VDEV_REMOVE_DEV); 5859 spa_vdev_remove_from_namespace(spa, vd); 5860 5861 } else if (vd != NULL) { 5862 /* 5863 * Normal vdevs cannot be removed (yet). 5864 */ 5865 error = SET_ERROR(ENOTSUP); 5866 } else { 5867 /* 5868 * There is no vdev of any kind with the specified guid. 5869 */ 5870 error = SET_ERROR(ENOENT); 5871 } 5872 5873 if (!locked) 5874 error = spa_vdev_exit(spa, NULL, txg, error); 5875 5876 if (ev) 5877 spa_event_post(ev); 5878 5879 return (error); 5880} 5881 5882/* 5883 * Find any device that's done replacing, or a vdev marked 'unspare' that's 5884 * currently spared, so we can detach it. 5885 */ 5886static vdev_t * 5887spa_vdev_resilver_done_hunt(vdev_t *vd) 5888{ 5889 vdev_t *newvd, *oldvd; 5890 5891 for (int c = 0; c < vd->vdev_children; c++) { 5892 oldvd = spa_vdev_resilver_done_hunt(vd->vdev_child[c]); 5893 if (oldvd != NULL) 5894 return (oldvd); 5895 } 5896 5897 /* 5898 * Check for a completed replacement. We always consider the first 5899 * vdev in the list to be the oldest vdev, and the last one to be 5900 * the newest (see spa_vdev_attach() for how that works). In 5901 * the case where the newest vdev is faulted, we will not automatically 5902 * remove it after a resilver completes. This is OK as it will require 5903 * user intervention to determine which disk the admin wishes to keep. 5904 */ 5905 if (vd->vdev_ops == &vdev_replacing_ops) { 5906 ASSERT(vd->vdev_children > 1); 5907 5908 newvd = vd->vdev_child[vd->vdev_children - 1]; 5909 oldvd = vd->vdev_child[0]; 5910 5911 if (vdev_dtl_empty(newvd, DTL_MISSING) && 5912 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5913 !vdev_dtl_required(oldvd)) 5914 return (oldvd); 5915 } 5916 5917 /* 5918 * Check for a completed resilver with the 'unspare' flag set. 5919 */ 5920 if (vd->vdev_ops == &vdev_spare_ops) { 5921 vdev_t *first = vd->vdev_child[0]; 5922 vdev_t *last = vd->vdev_child[vd->vdev_children - 1]; 5923 5924 if (last->vdev_unspare) { 5925 oldvd = first; 5926 newvd = last; 5927 } else if (first->vdev_unspare) { 5928 oldvd = last; 5929 newvd = first; 5930 } else { 5931 oldvd = NULL; 5932 } 5933 5934 if (oldvd != NULL && 5935 vdev_dtl_empty(newvd, DTL_MISSING) && 5936 vdev_dtl_empty(newvd, DTL_OUTAGE) && 5937 !vdev_dtl_required(oldvd)) 5938 return (oldvd); 5939 5940 /* 5941 * If there are more than two spares attached to a disk, 5942 * and those spares are not required, then we want to 5943 * attempt to free them up now so that they can be used 5944 * by other pools. Once we're back down to a single 5945 * disk+spare, we stop removing them. 5946 */ 5947 if (vd->vdev_children > 2) { 5948 newvd = vd->vdev_child[1]; 5949 5950 if (newvd->vdev_isspare && last->vdev_isspare && 5951 vdev_dtl_empty(last, DTL_MISSING) && 5952 vdev_dtl_empty(last, DTL_OUTAGE) && 5953 !vdev_dtl_required(newvd)) 5954 return (newvd); 5955 } 5956 } 5957 5958 return (NULL); 5959} 5960 5961static void 5962spa_vdev_resilver_done(spa_t *spa) 5963{ 5964 vdev_t *vd, *pvd, *ppvd; 5965 uint64_t guid, sguid, pguid, ppguid; 5966 5967 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5968 5969 while ((vd = spa_vdev_resilver_done_hunt(spa->spa_root_vdev)) != NULL) { 5970 pvd = vd->vdev_parent; 5971 ppvd = pvd->vdev_parent; 5972 guid = vd->vdev_guid; 5973 pguid = pvd->vdev_guid; 5974 ppguid = ppvd->vdev_guid; 5975 sguid = 0; 5976 /* 5977 * If we have just finished replacing a hot spared device, then 5978 * we need to detach the parent's first child (the original hot 5979 * spare) as well. 5980 */ 5981 if (ppvd->vdev_ops == &vdev_spare_ops && pvd->vdev_id == 0 && 5982 ppvd->vdev_children == 2) { 5983 ASSERT(pvd->vdev_ops == &vdev_replacing_ops); 5984 sguid = ppvd->vdev_child[1]->vdev_guid; 5985 } 5986 ASSERT(vd->vdev_resilver_txg == 0 || !vdev_dtl_required(vd)); 5987 5988 spa_config_exit(spa, SCL_ALL, FTAG); 5989 if (spa_vdev_detach(spa, guid, pguid, B_TRUE) != 0) 5990 return; 5991 if (sguid && spa_vdev_detach(spa, sguid, ppguid, B_TRUE) != 0) 5992 return; 5993 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5994 } 5995 5996 spa_config_exit(spa, SCL_ALL, FTAG); 5997} 5998 5999/* 6000 * Update the stored path or FRU for this vdev. 6001 */ 6002int 6003spa_vdev_set_common(spa_t *spa, uint64_t guid, const char *value, 6004 boolean_t ispath) 6005{ 6006 vdev_t *vd; 6007 boolean_t sync = B_FALSE; 6008 6009 ASSERT(spa_writeable(spa)); 6010 6011 spa_vdev_state_enter(spa, SCL_ALL); 6012 6013 if ((vd = spa_lookup_by_guid(spa, guid, B_TRUE)) == NULL) 6014 return (spa_vdev_state_exit(spa, NULL, ENOENT)); 6015 6016 if (!vd->vdev_ops->vdev_op_leaf) 6017 return (spa_vdev_state_exit(spa, NULL, ENOTSUP)); 6018 6019 if (ispath) { 6020 if (strcmp(value, vd->vdev_path) != 0) { 6021 spa_strfree(vd->vdev_path); 6022 vd->vdev_path = spa_strdup(value); 6023 sync = B_TRUE; 6024 } 6025 } else { 6026 if (vd->vdev_fru == NULL) { 6027 vd->vdev_fru = spa_strdup(value); 6028 sync = B_TRUE; 6029 } else if (strcmp(value, vd->vdev_fru) != 0) { 6030 spa_strfree(vd->vdev_fru); 6031 vd->vdev_fru = spa_strdup(value); 6032 sync = B_TRUE; 6033 } 6034 } 6035 6036 return (spa_vdev_state_exit(spa, sync ? vd : NULL, 0)); 6037} 6038 6039int 6040spa_vdev_setpath(spa_t *spa, uint64_t guid, const char *newpath) 6041{ 6042 return (spa_vdev_set_common(spa, guid, newpath, B_TRUE)); 6043} 6044 6045int 6046spa_vdev_setfru(spa_t *spa, uint64_t guid, const char *newfru) 6047{ 6048 return (spa_vdev_set_common(spa, guid, newfru, B_FALSE)); 6049} 6050 6051/* 6052 * ========================================================================== 6053 * SPA Scanning 6054 * ========================================================================== 6055 */ 6056 6057int 6058spa_scan_stop(spa_t *spa) 6059{ 6060 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 6061 if (dsl_scan_resilvering(spa->spa_dsl_pool)) 6062 return (SET_ERROR(EBUSY)); 6063 return (dsl_scan_cancel(spa->spa_dsl_pool)); 6064} 6065 6066int 6067spa_scan(spa_t *spa, pool_scan_func_t func) 6068{ 6069 ASSERT(spa_config_held(spa, SCL_ALL, RW_WRITER) == 0); 6070 6071 if (func >= POOL_SCAN_FUNCS || func == POOL_SCAN_NONE) 6072 return (SET_ERROR(ENOTSUP)); 6073 6074 /* 6075 * If a resilver was requested, but there is no DTL on a 6076 * writeable leaf device, we have nothing to do. 6077 */ 6078 if (func == POOL_SCAN_RESILVER && 6079 !vdev_resilver_needed(spa->spa_root_vdev, NULL, NULL)) { 6080 spa_async_request(spa, SPA_ASYNC_RESILVER_DONE); 6081 return (0); 6082 } 6083 6084 return (dsl_scan(spa->spa_dsl_pool, func)); 6085} 6086 6087/* 6088 * ========================================================================== 6089 * SPA async task processing 6090 * ========================================================================== 6091 */ 6092 6093static void 6094spa_async_remove(spa_t *spa, vdev_t *vd) 6095{ 6096 if (vd->vdev_remove_wanted) { 6097 vd->vdev_remove_wanted = B_FALSE; 6098 vd->vdev_delayed_close = B_FALSE; 6099 vdev_set_state(vd, B_FALSE, VDEV_STATE_REMOVED, VDEV_AUX_NONE); 6100 6101 /* 6102 * We want to clear the stats, but we don't want to do a full 6103 * vdev_clear() as that will cause us to throw away 6104 * degraded/faulted state as well as attempt to reopen the 6105 * device, all of which is a waste. 6106 */ 6107 vd->vdev_stat.vs_read_errors = 0; 6108 vd->vdev_stat.vs_write_errors = 0; 6109 vd->vdev_stat.vs_checksum_errors = 0; 6110 6111 vdev_state_dirty(vd->vdev_top); 6112 /* Tell userspace that the vdev is gone. */ 6113 zfs_post_remove(spa, vd); 6114 } 6115 6116 for (int c = 0; c < vd->vdev_children; c++) 6117 spa_async_remove(spa, vd->vdev_child[c]); 6118} 6119 6120static void 6121spa_async_probe(spa_t *spa, vdev_t *vd) 6122{ 6123 if (vd->vdev_probe_wanted) { 6124 vd->vdev_probe_wanted = B_FALSE; 6125 vdev_reopen(vd); /* vdev_open() does the actual probe */ 6126 } 6127 6128 for (int c = 0; c < vd->vdev_children; c++) 6129 spa_async_probe(spa, vd->vdev_child[c]); 6130} 6131 6132static void 6133spa_async_autoexpand(spa_t *spa, vdev_t *vd) 6134{ 6135 sysevent_id_t eid; 6136 nvlist_t *attr; 6137 char *physpath; 6138 6139 if (!spa->spa_autoexpand) 6140 return; 6141 6142 for (int c = 0; c < vd->vdev_children; c++) { 6143 vdev_t *cvd = vd->vdev_child[c]; 6144 spa_async_autoexpand(spa, cvd); 6145 } 6146 6147 if (!vd->vdev_ops->vdev_op_leaf || vd->vdev_physpath == NULL) 6148 return; 6149 6150 physpath = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 6151 (void) snprintf(physpath, MAXPATHLEN, "/devices%s", vd->vdev_physpath); 6152 6153 VERIFY(nvlist_alloc(&attr, NV_UNIQUE_NAME, KM_SLEEP) == 0); 6154 VERIFY(nvlist_add_string(attr, DEV_PHYS_PATH, physpath) == 0); 6155 6156 (void) ddi_log_sysevent(zfs_dip, SUNW_VENDOR, EC_DEV_STATUS, 6157 ESC_ZFS_VDEV_AUTOEXPAND, attr, &eid, DDI_SLEEP); 6158 6159 nvlist_free(attr); 6160 kmem_free(physpath, MAXPATHLEN); 6161} 6162 6163static void 6164spa_async_thread(void *arg) 6165{ 6166 spa_t *spa = arg; 6167 int tasks; 6168 6169 ASSERT(spa->spa_sync_on); 6170 6171 mutex_enter(&spa->spa_async_lock); 6172 tasks = spa->spa_async_tasks; 6173 spa->spa_async_tasks &= SPA_ASYNC_REMOVE; 6174 mutex_exit(&spa->spa_async_lock); 6175 6176 /* 6177 * See if the config needs to be updated. 6178 */ 6179 if (tasks & SPA_ASYNC_CONFIG_UPDATE) { 6180 uint64_t old_space, new_space; 6181 6182 mutex_enter(&spa_namespace_lock); 6183 old_space = metaslab_class_get_space(spa_normal_class(spa)); 6184 spa_config_update(spa, SPA_CONFIG_UPDATE_POOL); 6185 new_space = metaslab_class_get_space(spa_normal_class(spa)); 6186 mutex_exit(&spa_namespace_lock); 6187 6188 /* 6189 * If the pool grew as a result of the config update, 6190 * then log an internal history event. 6191 */ 6192 if (new_space != old_space) { 6193 spa_history_log_internal(spa, "vdev online", NULL, 6194 "pool '%s' size: %llu(+%llu)", 6195 spa_name(spa), new_space, new_space - old_space); 6196 } 6197 } 6198 6199 if ((tasks & SPA_ASYNC_AUTOEXPAND) && !spa_suspended(spa)) { 6200 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 6201 spa_async_autoexpand(spa, spa->spa_root_vdev); 6202 spa_config_exit(spa, SCL_CONFIG, FTAG); 6203 } 6204 6205 /* 6206 * See if any devices need to be probed. 6207 */ 6208 if (tasks & SPA_ASYNC_PROBE) { 6209 spa_vdev_state_enter(spa, SCL_NONE); 6210 spa_async_probe(spa, spa->spa_root_vdev); 6211 (void) spa_vdev_state_exit(spa, NULL, 0); 6212 } 6213 6214 /* 6215 * If any devices are done replacing, detach them. 6216 */ 6217 if (tasks & SPA_ASYNC_RESILVER_DONE) 6218 spa_vdev_resilver_done(spa); 6219 6220 /* 6221 * Kick off a resilver. 6222 */ 6223 if (tasks & SPA_ASYNC_RESILVER) 6224 dsl_resilver_restart(spa->spa_dsl_pool, 0); 6225 6226 /* 6227 * Let the world know that we're done. 6228 */ 6229 mutex_enter(&spa->spa_async_lock); 6230 spa->spa_async_thread = NULL; 6231 cv_broadcast(&spa->spa_async_cv); 6232 mutex_exit(&spa->spa_async_lock); 6233 thread_exit(); 6234} 6235 6236static void 6237spa_async_thread_vd(void *arg) 6238{ 6239 spa_t *spa = arg; 6240 int tasks; 6241 6242 ASSERT(spa->spa_sync_on); 6243 6244 mutex_enter(&spa->spa_async_lock); 6245 tasks = spa->spa_async_tasks; 6246retry: 6247 spa->spa_async_tasks &= ~SPA_ASYNC_REMOVE; 6248 mutex_exit(&spa->spa_async_lock); 6249 6250 /* 6251 * See if any devices need to be marked REMOVED. 6252 */ 6253 if (tasks & SPA_ASYNC_REMOVE) { 6254 spa_vdev_state_enter(spa, SCL_NONE); 6255 spa_async_remove(spa, spa->spa_root_vdev); 6256 for (int i = 0; i < spa->spa_l2cache.sav_count; i++) 6257 spa_async_remove(spa, spa->spa_l2cache.sav_vdevs[i]); 6258 for (int i = 0; i < spa->spa_spares.sav_count; i++) 6259 spa_async_remove(spa, spa->spa_spares.sav_vdevs[i]); 6260 (void) spa_vdev_state_exit(spa, NULL, 0); 6261 } 6262 6263 /* 6264 * Let the world know that we're done. 6265 */ 6266 mutex_enter(&spa->spa_async_lock); 6267 tasks = spa->spa_async_tasks; 6268 if ((tasks & SPA_ASYNC_REMOVE) != 0) 6269 goto retry; 6270 spa->spa_async_thread_vd = NULL; 6271 cv_broadcast(&spa->spa_async_cv); 6272 mutex_exit(&spa->spa_async_lock); 6273 thread_exit(); 6274} 6275 6276void 6277spa_async_suspend(spa_t *spa) 6278{ 6279 mutex_enter(&spa->spa_async_lock); 6280 spa->spa_async_suspended++; 6281 while (spa->spa_async_thread != NULL && 6282 spa->spa_async_thread_vd != NULL) 6283 cv_wait(&spa->spa_async_cv, &spa->spa_async_lock); 6284 mutex_exit(&spa->spa_async_lock); 6285} 6286 6287void 6288spa_async_resume(spa_t *spa) 6289{ 6290 mutex_enter(&spa->spa_async_lock); 6291 ASSERT(spa->spa_async_suspended != 0); 6292 spa->spa_async_suspended--; 6293 mutex_exit(&spa->spa_async_lock); 6294} 6295 6296static boolean_t 6297spa_async_tasks_pending(spa_t *spa) 6298{ 6299 uint_t non_config_tasks; 6300 uint_t config_task; 6301 boolean_t config_task_suspended; 6302 6303 non_config_tasks = spa->spa_async_tasks & ~(SPA_ASYNC_CONFIG_UPDATE | 6304 SPA_ASYNC_REMOVE); 6305 config_task = spa->spa_async_tasks & SPA_ASYNC_CONFIG_UPDATE; 6306 if (spa->spa_ccw_fail_time == 0) { 6307 config_task_suspended = B_FALSE; 6308 } else { 6309 config_task_suspended = 6310 (gethrtime() - spa->spa_ccw_fail_time) < 6311 (zfs_ccw_retry_interval * NANOSEC); 6312 } 6313 6314 return (non_config_tasks || (config_task && !config_task_suspended)); 6315} 6316 6317static void 6318spa_async_dispatch(spa_t *spa) 6319{ 6320 mutex_enter(&spa->spa_async_lock); 6321 if (spa_async_tasks_pending(spa) && 6322 !spa->spa_async_suspended && 6323 spa->spa_async_thread == NULL && 6324 rootdir != NULL) 6325 spa->spa_async_thread = thread_create(NULL, 0, 6326 spa_async_thread, spa, 0, &p0, TS_RUN, maxclsyspri); 6327 mutex_exit(&spa->spa_async_lock); 6328} 6329 6330static void 6331spa_async_dispatch_vd(spa_t *spa) 6332{ 6333 mutex_enter(&spa->spa_async_lock); 6334 if ((spa->spa_async_tasks & SPA_ASYNC_REMOVE) != 0 && 6335 !spa->spa_async_suspended && 6336 spa->spa_async_thread_vd == NULL && 6337 rootdir != NULL) 6338 spa->spa_async_thread_vd = thread_create(NULL, 0, 6339 spa_async_thread_vd, spa, 0, &p0, TS_RUN, maxclsyspri); 6340 mutex_exit(&spa->spa_async_lock); 6341} 6342 6343void 6344spa_async_request(spa_t *spa, int task) 6345{ 6346 zfs_dbgmsg("spa=%s async request task=%u", spa->spa_name, task); 6347 mutex_enter(&spa->spa_async_lock); 6348 spa->spa_async_tasks |= task; 6349 mutex_exit(&spa->spa_async_lock); 6350 spa_async_dispatch_vd(spa); 6351} 6352 6353/* 6354 * ========================================================================== 6355 * SPA syncing routines 6356 * ========================================================================== 6357 */ 6358 6359static int 6360bpobj_enqueue_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6361{ 6362 bpobj_t *bpo = arg; 6363 bpobj_enqueue(bpo, bp, tx); 6364 return (0); 6365} 6366 6367static int 6368spa_free_sync_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx) 6369{ 6370 zio_t *zio = arg; 6371 6372 zio_nowait(zio_free_sync(zio, zio->io_spa, dmu_tx_get_txg(tx), bp, 6373 BP_GET_PSIZE(bp), zio->io_flags)); 6374 return (0); 6375} 6376 6377/* 6378 * Note: this simple function is not inlined to make it easier to dtrace the 6379 * amount of time spent syncing frees. 6380 */ 6381static void 6382spa_sync_frees(spa_t *spa, bplist_t *bpl, dmu_tx_t *tx) 6383{ 6384 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6385 bplist_iterate(bpl, spa_free_sync_cb, zio, tx); 6386 VERIFY(zio_wait(zio) == 0); 6387} 6388 6389/* 6390 * Note: this simple function is not inlined to make it easier to dtrace the 6391 * amount of time spent syncing deferred frees. 6392 */ 6393static void 6394spa_sync_deferred_frees(spa_t *spa, dmu_tx_t *tx) 6395{ 6396 zio_t *zio = zio_root(spa, NULL, NULL, 0); 6397 VERIFY3U(bpobj_iterate(&spa->spa_deferred_bpobj, 6398 spa_free_sync_cb, zio, tx), ==, 0); 6399 VERIFY0(zio_wait(zio)); 6400} 6401 6402 6403static void 6404spa_sync_nvlist(spa_t *spa, uint64_t obj, nvlist_t *nv, dmu_tx_t *tx) 6405{ 6406 char *packed = NULL; 6407 size_t bufsize; 6408 size_t nvsize = 0; 6409 dmu_buf_t *db; 6410 6411 VERIFY(nvlist_size(nv, &nvsize, NV_ENCODE_XDR) == 0); 6412 6413 /* 6414 * Write full (SPA_CONFIG_BLOCKSIZE) blocks of configuration 6415 * information. This avoids the dmu_buf_will_dirty() path and 6416 * saves us a pre-read to get data we don't actually care about. 6417 */ 6418 bufsize = P2ROUNDUP((uint64_t)nvsize, SPA_CONFIG_BLOCKSIZE); 6419 packed = kmem_alloc(bufsize, KM_SLEEP); 6420 6421 VERIFY(nvlist_pack(nv, &packed, &nvsize, NV_ENCODE_XDR, 6422 KM_SLEEP) == 0); 6423 bzero(packed + nvsize, bufsize - nvsize); 6424 6425 dmu_write(spa->spa_meta_objset, obj, 0, bufsize, packed, tx); 6426 6427 kmem_free(packed, bufsize); 6428 6429 VERIFY(0 == dmu_bonus_hold(spa->spa_meta_objset, obj, FTAG, &db)); 6430 dmu_buf_will_dirty(db, tx); 6431 *(uint64_t *)db->db_data = nvsize; 6432 dmu_buf_rele(db, FTAG); 6433} 6434 6435static void 6436spa_sync_aux_dev(spa_t *spa, spa_aux_vdev_t *sav, dmu_tx_t *tx, 6437 const char *config, const char *entry) 6438{ 6439 nvlist_t *nvroot; 6440 nvlist_t **list; 6441 int i; 6442 6443 if (!sav->sav_sync) 6444 return; 6445 6446 /* 6447 * Update the MOS nvlist describing the list of available devices. 6448 * spa_validate_aux() will have already made sure this nvlist is 6449 * valid and the vdevs are labeled appropriately. 6450 */ 6451 if (sav->sav_object == 0) { 6452 sav->sav_object = dmu_object_alloc(spa->spa_meta_objset, 6453 DMU_OT_PACKED_NVLIST, 1 << 14, DMU_OT_PACKED_NVLIST_SIZE, 6454 sizeof (uint64_t), tx); 6455 VERIFY(zap_update(spa->spa_meta_objset, 6456 DMU_POOL_DIRECTORY_OBJECT, entry, sizeof (uint64_t), 1, 6457 &sav->sav_object, tx) == 0); 6458 } 6459 6460 VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0); 6461 if (sav->sav_count == 0) { 6462 VERIFY(nvlist_add_nvlist_array(nvroot, config, NULL, 0) == 0); 6463 } else { 6464 list = kmem_alloc(sav->sav_count * sizeof (void *), KM_SLEEP); 6465 for (i = 0; i < sav->sav_count; i++) 6466 list[i] = vdev_config_generate(spa, sav->sav_vdevs[i], 6467 B_FALSE, VDEV_CONFIG_L2CACHE); 6468 VERIFY(nvlist_add_nvlist_array(nvroot, config, list, 6469 sav->sav_count) == 0); 6470 for (i = 0; i < sav->sav_count; i++) 6471 nvlist_free(list[i]); 6472 kmem_free(list, sav->sav_count * sizeof (void *)); 6473 } 6474 6475 spa_sync_nvlist(spa, sav->sav_object, nvroot, tx); 6476 nvlist_free(nvroot); 6477 6478 sav->sav_sync = B_FALSE; 6479} 6480 6481/* 6482 * Rebuild spa's all-vdev ZAP from the vdev ZAPs indicated in each vdev_t. 6483 * The all-vdev ZAP must be empty. 6484 */ 6485static void 6486spa_avz_build(vdev_t *vd, uint64_t avz, dmu_tx_t *tx) 6487{ 6488 spa_t *spa = vd->vdev_spa; 6489 if (vd->vdev_top_zap != 0) { 6490 VERIFY0(zap_add_int(spa->spa_meta_objset, avz, 6491 vd->vdev_top_zap, tx)); 6492 } 6493 if (vd->vdev_leaf_zap != 0) { 6494 VERIFY0(zap_add_int(spa->spa_meta_objset, avz, 6495 vd->vdev_leaf_zap, tx)); 6496 } 6497 for (uint64_t i = 0; i < vd->vdev_children; i++) { 6498 spa_avz_build(vd->vdev_child[i], avz, tx); 6499 } 6500} 6501 6502static void 6503spa_sync_config_object(spa_t *spa, dmu_tx_t *tx) 6504{ 6505 nvlist_t *config; 6506 6507 /* 6508 * If the pool is being imported from a pre-per-vdev-ZAP version of ZFS, 6509 * its config may not be dirty but we still need to build per-vdev ZAPs. 6510 * Similarly, if the pool is being assembled (e.g. after a split), we 6511 * need to rebuild the AVZ although the config may not be dirty. 6512 */ 6513 if (list_is_empty(&spa->spa_config_dirty_list) && 6514 spa->spa_avz_action == AVZ_ACTION_NONE) 6515 return; 6516 6517 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6518 6519 ASSERT(spa->spa_avz_action == AVZ_ACTION_NONE || 6520 spa->spa_avz_action == AVZ_ACTION_INITIALIZE || 6521 spa->spa_all_vdev_zaps != 0); 6522 6523 if (spa->spa_avz_action == AVZ_ACTION_REBUILD) { 6524 /* Make and build the new AVZ */ 6525 uint64_t new_avz = zap_create(spa->spa_meta_objset, 6526 DMU_OTN_ZAP_METADATA, DMU_OT_NONE, 0, tx); 6527 spa_avz_build(spa->spa_root_vdev, new_avz, tx); 6528 6529 /* Diff old AVZ with new one */ 6530 zap_cursor_t zc; 6531 zap_attribute_t za; 6532 6533 for (zap_cursor_init(&zc, spa->spa_meta_objset, 6534 spa->spa_all_vdev_zaps); 6535 zap_cursor_retrieve(&zc, &za) == 0; 6536 zap_cursor_advance(&zc)) { 6537 uint64_t vdzap = za.za_first_integer; 6538 if (zap_lookup_int(spa->spa_meta_objset, new_avz, 6539 vdzap) == ENOENT) { 6540 /* 6541 * ZAP is listed in old AVZ but not in new one; 6542 * destroy it 6543 */ 6544 VERIFY0(zap_destroy(spa->spa_meta_objset, vdzap, 6545 tx)); 6546 } 6547 } 6548 6549 zap_cursor_fini(&zc); 6550 6551 /* Destroy the old AVZ */ 6552 VERIFY0(zap_destroy(spa->spa_meta_objset, 6553 spa->spa_all_vdev_zaps, tx)); 6554 6555 /* Replace the old AVZ in the dir obj with the new one */ 6556 VERIFY0(zap_update(spa->spa_meta_objset, 6557 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_VDEV_ZAP_MAP, 6558 sizeof (new_avz), 1, &new_avz, tx)); 6559 6560 spa->spa_all_vdev_zaps = new_avz; 6561 } else if (spa->spa_avz_action == AVZ_ACTION_DESTROY) { 6562 zap_cursor_t zc; 6563 zap_attribute_t za; 6564 6565 /* Walk through the AVZ and destroy all listed ZAPs */ 6566 for (zap_cursor_init(&zc, spa->spa_meta_objset, 6567 spa->spa_all_vdev_zaps); 6568 zap_cursor_retrieve(&zc, &za) == 0; 6569 zap_cursor_advance(&zc)) { 6570 uint64_t zap = za.za_first_integer; 6571 VERIFY0(zap_destroy(spa->spa_meta_objset, zap, tx)); 6572 } 6573 6574 zap_cursor_fini(&zc); 6575 6576 /* Destroy and unlink the AVZ itself */ 6577 VERIFY0(zap_destroy(spa->spa_meta_objset, 6578 spa->spa_all_vdev_zaps, tx)); 6579 VERIFY0(zap_remove(spa->spa_meta_objset, 6580 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_VDEV_ZAP_MAP, tx)); 6581 spa->spa_all_vdev_zaps = 0; 6582 } 6583 6584 if (spa->spa_all_vdev_zaps == 0) { 6585 spa->spa_all_vdev_zaps = zap_create_link(spa->spa_meta_objset, 6586 DMU_OTN_ZAP_METADATA, DMU_POOL_DIRECTORY_OBJECT, 6587 DMU_POOL_VDEV_ZAP_MAP, tx); 6588 } 6589 spa->spa_avz_action = AVZ_ACTION_NONE; 6590 6591 /* Create ZAPs for vdevs that don't have them. */ 6592 vdev_construct_zaps(spa->spa_root_vdev, tx); 6593 6594 config = spa_config_generate(spa, spa->spa_root_vdev, 6595 dmu_tx_get_txg(tx), B_FALSE); 6596 6597 /* 6598 * If we're upgrading the spa version then make sure that 6599 * the config object gets updated with the correct version. 6600 */ 6601 if (spa->spa_ubsync.ub_version < spa->spa_uberblock.ub_version) 6602 fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 6603 spa->spa_uberblock.ub_version); 6604 6605 spa_config_exit(spa, SCL_STATE, FTAG); 6606 6607 nvlist_free(spa->spa_config_syncing); 6608 spa->spa_config_syncing = config; 6609 6610 spa_sync_nvlist(spa, spa->spa_config_object, config, tx); 6611} 6612 6613static void 6614spa_sync_version(void *arg, dmu_tx_t *tx) 6615{ 6616 uint64_t *versionp = arg; 6617 uint64_t version = *versionp; 6618 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6619 6620 /* 6621 * Setting the version is special cased when first creating the pool. 6622 */ 6623 ASSERT(tx->tx_txg != TXG_INITIAL); 6624 6625 ASSERT(SPA_VERSION_IS_SUPPORTED(version)); 6626 ASSERT(version >= spa_version(spa)); 6627 6628 spa->spa_uberblock.ub_version = version; 6629 vdev_config_dirty(spa->spa_root_vdev); 6630 spa_history_log_internal(spa, "set", tx, "version=%lld", version); 6631} 6632 6633/* 6634 * Set zpool properties. 6635 */ 6636static void 6637spa_sync_props(void *arg, dmu_tx_t *tx) 6638{ 6639 nvlist_t *nvp = arg; 6640 spa_t *spa = dmu_tx_pool(tx)->dp_spa; 6641 objset_t *mos = spa->spa_meta_objset; 6642 nvpair_t *elem = NULL; 6643 6644 mutex_enter(&spa->spa_props_lock); 6645 6646 while ((elem = nvlist_next_nvpair(nvp, elem))) { 6647 uint64_t intval; 6648 char *strval, *fname; 6649 zpool_prop_t prop; 6650 const char *propname; 6651 zprop_type_t proptype; 6652 spa_feature_t fid; 6653 6654 switch (prop = zpool_name_to_prop(nvpair_name(elem))) { 6655 case ZPROP_INVAL: 6656 /* 6657 * We checked this earlier in spa_prop_validate(). 6658 */ 6659 ASSERT(zpool_prop_feature(nvpair_name(elem))); 6660 6661 fname = strchr(nvpair_name(elem), '@') + 1; 6662 VERIFY0(zfeature_lookup_name(fname, &fid)); 6663 6664 spa_feature_enable(spa, fid, tx); 6665 spa_history_log_internal(spa, "set", tx, 6666 "%s=enabled", nvpair_name(elem)); 6667 break; 6668 6669 case ZPOOL_PROP_VERSION: 6670 intval = fnvpair_value_uint64(elem); 6671 /* 6672 * The version is synced seperatly before other 6673 * properties and should be correct by now. 6674 */ 6675 ASSERT3U(spa_version(spa), >=, intval); 6676 break; 6677 6678 case ZPOOL_PROP_ALTROOT: 6679 /* 6680 * 'altroot' is a non-persistent property. It should 6681 * have been set temporarily at creation or import time. 6682 */ 6683 ASSERT(spa->spa_root != NULL); 6684 break; 6685 6686 case ZPOOL_PROP_READONLY: 6687 case ZPOOL_PROP_CACHEFILE: 6688 /* 6689 * 'readonly' and 'cachefile' are also non-persisitent 6690 * properties. 6691 */ 6692 break; 6693 case ZPOOL_PROP_COMMENT: 6694 strval = fnvpair_value_string(elem); 6695 if (spa->spa_comment != NULL) 6696 spa_strfree(spa->spa_comment); 6697 spa->spa_comment = spa_strdup(strval); 6698 /* 6699 * We need to dirty the configuration on all the vdevs 6700 * so that their labels get updated. It's unnecessary 6701 * to do this for pool creation since the vdev's 6702 * configuratoin has already been dirtied. 6703 */ 6704 if (tx->tx_txg != TXG_INITIAL) 6705 vdev_config_dirty(spa->spa_root_vdev); 6706 spa_history_log_internal(spa, "set", tx, 6707 "%s=%s", nvpair_name(elem), strval); 6708 break; 6709 default: 6710 /* 6711 * Set pool property values in the poolprops mos object. 6712 */ 6713 if (spa->spa_pool_props_object == 0) { 6714 spa->spa_pool_props_object = 6715 zap_create_link(mos, DMU_OT_POOL_PROPS, 6716 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_PROPS, 6717 tx); 6718 } 6719 6720 /* normalize the property name */ 6721 propname = zpool_prop_to_name(prop); 6722 proptype = zpool_prop_get_type(prop); 6723 6724 if (nvpair_type(elem) == DATA_TYPE_STRING) { 6725 ASSERT(proptype == PROP_TYPE_STRING); 6726 strval = fnvpair_value_string(elem); 6727 VERIFY0(zap_update(mos, 6728 spa->spa_pool_props_object, propname, 6729 1, strlen(strval) + 1, strval, tx)); 6730 spa_history_log_internal(spa, "set", tx, 6731 "%s=%s", nvpair_name(elem), strval); 6732 } else if (nvpair_type(elem) == DATA_TYPE_UINT64) { 6733 intval = fnvpair_value_uint64(elem); 6734 6735 if (proptype == PROP_TYPE_INDEX) { 6736 const char *unused; 6737 VERIFY0(zpool_prop_index_to_string( 6738 prop, intval, &unused)); 6739 } 6740 VERIFY0(zap_update(mos, 6741 spa->spa_pool_props_object, propname, 6742 8, 1, &intval, tx)); 6743 spa_history_log_internal(spa, "set", tx, 6744 "%s=%lld", nvpair_name(elem), intval); 6745 } else { 6746 ASSERT(0); /* not allowed */ 6747 } 6748 6749 switch (prop) { 6750 case ZPOOL_PROP_DELEGATION: 6751 spa->spa_delegation = intval; 6752 break; 6753 case ZPOOL_PROP_BOOTFS: 6754 spa->spa_bootfs = intval; 6755 break; 6756 case ZPOOL_PROP_FAILUREMODE: 6757 spa->spa_failmode = intval; 6758 break; 6759 case ZPOOL_PROP_AUTOEXPAND: 6760 spa->spa_autoexpand = intval; 6761 if (tx->tx_txg != TXG_INITIAL) 6762 spa_async_request(spa, 6763 SPA_ASYNC_AUTOEXPAND); 6764 break; 6765 case ZPOOL_PROP_DEDUPDITTO: 6766 spa->spa_dedup_ditto = intval; 6767 break; 6768 default: 6769 break; 6770 } 6771 } 6772 6773 } 6774 6775 mutex_exit(&spa->spa_props_lock); 6776} 6777 6778/* 6779 * Perform one-time upgrade on-disk changes. spa_version() does not 6780 * reflect the new version this txg, so there must be no changes this 6781 * txg to anything that the upgrade code depends on after it executes. 6782 * Therefore this must be called after dsl_pool_sync() does the sync 6783 * tasks. 6784 */ 6785static void 6786spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx) 6787{ 6788 dsl_pool_t *dp = spa->spa_dsl_pool; 6789 6790 ASSERT(spa->spa_sync_pass == 1); 6791 6792 rrw_enter(&dp->dp_config_rwlock, RW_WRITER, FTAG); 6793 6794 if (spa->spa_ubsync.ub_version < SPA_VERSION_ORIGIN && 6795 spa->spa_uberblock.ub_version >= SPA_VERSION_ORIGIN) { 6796 dsl_pool_create_origin(dp, tx); 6797 6798 /* Keeping the origin open increases spa_minref */ 6799 spa->spa_minref += 3; 6800 } 6801 6802 if (spa->spa_ubsync.ub_version < SPA_VERSION_NEXT_CLONES && 6803 spa->spa_uberblock.ub_version >= SPA_VERSION_NEXT_CLONES) { 6804 dsl_pool_upgrade_clones(dp, tx); 6805 } 6806 6807 if (spa->spa_ubsync.ub_version < SPA_VERSION_DIR_CLONES && 6808 spa->spa_uberblock.ub_version >= SPA_VERSION_DIR_CLONES) { 6809 dsl_pool_upgrade_dir_clones(dp, tx); 6810 6811 /* Keeping the freedir open increases spa_minref */ 6812 spa->spa_minref += 3; 6813 } 6814 6815 if (spa->spa_ubsync.ub_version < SPA_VERSION_FEATURES && 6816 spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 6817 spa_feature_create_zap_objects(spa, tx); 6818 } 6819 6820 /* 6821 * LZ4_COMPRESS feature's behaviour was changed to activate_on_enable 6822 * when possibility to use lz4 compression for metadata was added 6823 * Old pools that have this feature enabled must be upgraded to have 6824 * this feature active 6825 */ 6826 if (spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) { 6827 boolean_t lz4_en = spa_feature_is_enabled(spa, 6828 SPA_FEATURE_LZ4_COMPRESS); 6829 boolean_t lz4_ac = spa_feature_is_active(spa, 6830 SPA_FEATURE_LZ4_COMPRESS); 6831 6832 if (lz4_en && !lz4_ac) 6833 spa_feature_incr(spa, SPA_FEATURE_LZ4_COMPRESS, tx); 6834 } 6835 6836 /* 6837 * If we haven't written the salt, do so now. Note that the 6838 * feature may not be activated yet, but that's fine since 6839 * the presence of this ZAP entry is backwards compatible. 6840 */ 6841 if (zap_contains(spa->spa_meta_objset, DMU_POOL_DIRECTORY_OBJECT, 6842 DMU_POOL_CHECKSUM_SALT) == ENOENT) { 6843 VERIFY0(zap_add(spa->spa_meta_objset, 6844 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_CHECKSUM_SALT, 1, 6845 sizeof (spa->spa_cksum_salt.zcs_bytes), 6846 spa->spa_cksum_salt.zcs_bytes, tx)); 6847 } 6848 6849 rrw_exit(&dp->dp_config_rwlock, FTAG); 6850} 6851 6852/* 6853 * Sync the specified transaction group. New blocks may be dirtied as 6854 * part of the process, so we iterate until it converges. 6855 */ 6856void 6857spa_sync(spa_t *spa, uint64_t txg) 6858{ 6859 dsl_pool_t *dp = spa->spa_dsl_pool; 6860 objset_t *mos = spa->spa_meta_objset; 6861 bplist_t *free_bpl = &spa->spa_free_bplist[txg & TXG_MASK]; 6862 vdev_t *rvd = spa->spa_root_vdev; 6863 vdev_t *vd; 6864 dmu_tx_t *tx; 6865 int error; 6866 uint32_t max_queue_depth = zfs_vdev_async_write_max_active * 6867 zfs_vdev_queue_depth_pct / 100; 6868 6869 VERIFY(spa_writeable(spa)); 6870 6871 /* 6872 * Lock out configuration changes. 6873 */ 6874 spa_config_enter(spa, SCL_CONFIG, FTAG, RW_READER); 6875 6876 spa->spa_syncing_txg = txg; 6877 spa->spa_sync_pass = 0; 6878 6879 mutex_enter(&spa->spa_alloc_lock); 6880 VERIFY0(avl_numnodes(&spa->spa_alloc_tree)); 6881 mutex_exit(&spa->spa_alloc_lock); 6882 6883 /* 6884 * If there are any pending vdev state changes, convert them 6885 * into config changes that go out with this transaction group. 6886 */ 6887 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 6888 while (list_head(&spa->spa_state_dirty_list) != NULL) { 6889 /* 6890 * We need the write lock here because, for aux vdevs, 6891 * calling vdev_config_dirty() modifies sav_config. 6892 * This is ugly and will become unnecessary when we 6893 * eliminate the aux vdev wart by integrating all vdevs 6894 * into the root vdev tree. 6895 */ 6896 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6897 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_WRITER); 6898 while ((vd = list_head(&spa->spa_state_dirty_list)) != NULL) { 6899 vdev_state_clean(vd); 6900 vdev_config_dirty(vd); 6901 } 6902 spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 6903 spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 6904 } 6905 spa_config_exit(spa, SCL_STATE, FTAG); 6906 6907 tx = dmu_tx_create_assigned(dp, txg); 6908 6909 spa->spa_sync_starttime = gethrtime(); 6910#ifdef illumos 6911 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, 6912 spa->spa_sync_starttime + spa->spa_deadman_synctime)); 6913#else /* !illumos */ 6914#ifdef _KERNEL 6915 callout_schedule(&spa->spa_deadman_cycid, 6916 hz * spa->spa_deadman_synctime / NANOSEC); 6917#endif 6918#endif /* illumos */ 6919 6920 /* 6921 * If we are upgrading to SPA_VERSION_RAIDZ_DEFLATE this txg, 6922 * set spa_deflate if we have no raid-z vdevs. 6923 */ 6924 if (spa->spa_ubsync.ub_version < SPA_VERSION_RAIDZ_DEFLATE && 6925 spa->spa_uberblock.ub_version >= SPA_VERSION_RAIDZ_DEFLATE) { 6926 int i; 6927 6928 for (i = 0; i < rvd->vdev_children; i++) { 6929 vd = rvd->vdev_child[i]; 6930 if (vd->vdev_deflate_ratio != SPA_MINBLOCKSIZE) 6931 break; 6932 } 6933 if (i == rvd->vdev_children) { 6934 spa->spa_deflate = TRUE; 6935 VERIFY(0 == zap_add(spa->spa_meta_objset, 6936 DMU_POOL_DIRECTORY_OBJECT, DMU_POOL_DEFLATE, 6937 sizeof (uint64_t), 1, &spa->spa_deflate, tx)); 6938 } 6939 } 6940 6941 /* 6942 * Set the top-level vdev's max queue depth. Evaluate each 6943 * top-level's async write queue depth in case it changed. 6944 * The max queue depth will not change in the middle of syncing 6945 * out this txg. 6946 */ 6947 uint64_t queue_depth_total = 0; 6948 for (int c = 0; c < rvd->vdev_children; c++) { 6949 vdev_t *tvd = rvd->vdev_child[c]; 6950 metaslab_group_t *mg = tvd->vdev_mg; 6951 6952 if (mg == NULL || mg->mg_class != spa_normal_class(spa) || 6953 !metaslab_group_initialized(mg)) 6954 continue; 6955 6956 /* 6957 * It is safe to do a lock-free check here because only async 6958 * allocations look at mg_max_alloc_queue_depth, and async 6959 * allocations all happen from spa_sync(). 6960 */ 6961 ASSERT0(refcount_count(&mg->mg_alloc_queue_depth)); 6962 mg->mg_max_alloc_queue_depth = max_queue_depth; 6963 queue_depth_total += mg->mg_max_alloc_queue_depth; 6964 } 6965 metaslab_class_t *mc = spa_normal_class(spa); 6966 ASSERT0(refcount_count(&mc->mc_alloc_slots)); 6967 mc->mc_alloc_max_slots = queue_depth_total; 6968 mc->mc_alloc_throttle_enabled = zio_dva_throttle_enabled; 6969 6970 ASSERT3U(mc->mc_alloc_max_slots, <=, 6971 max_queue_depth * rvd->vdev_children); 6972 6973 /* 6974 * Iterate to convergence. 6975 */ 6976 do { 6977 int pass = ++spa->spa_sync_pass; 6978 6979 spa_sync_config_object(spa, tx); 6980 spa_sync_aux_dev(spa, &spa->spa_spares, tx, 6981 ZPOOL_CONFIG_SPARES, DMU_POOL_SPARES); 6982 spa_sync_aux_dev(spa, &spa->spa_l2cache, tx, 6983 ZPOOL_CONFIG_L2CACHE, DMU_POOL_L2CACHE); 6984 spa_errlog_sync(spa, txg); 6985 dsl_pool_sync(dp, txg); 6986 6987 if (pass < zfs_sync_pass_deferred_free) { 6988 spa_sync_frees(spa, free_bpl, tx); 6989 } else { 6990 /* 6991 * We can not defer frees in pass 1, because 6992 * we sync the deferred frees later in pass 1. 6993 */ 6994 ASSERT3U(pass, >, 1); 6995 bplist_iterate(free_bpl, bpobj_enqueue_cb, 6996 &spa->spa_deferred_bpobj, tx); 6997 } 6998 6999 ddt_sync(spa, txg); 7000 dsl_scan_sync(dp, tx); 7001 7002 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, txg)) 7003 vdev_sync(vd, txg); 7004 7005 if (pass == 1) { 7006 spa_sync_upgrades(spa, tx); 7007 ASSERT3U(txg, >=, 7008 spa->spa_uberblock.ub_rootbp.blk_birth); 7009 /* 7010 * Note: We need to check if the MOS is dirty 7011 * because we could have marked the MOS dirty 7012 * without updating the uberblock (e.g. if we 7013 * have sync tasks but no dirty user data). We 7014 * need to check the uberblock's rootbp because 7015 * it is updated if we have synced out dirty 7016 * data (though in this case the MOS will most 7017 * likely also be dirty due to second order 7018 * effects, we don't want to rely on that here). 7019 */ 7020 if (spa->spa_uberblock.ub_rootbp.blk_birth < txg && 7021 !dmu_objset_is_dirty(mos, txg)) { 7022 /* 7023 * Nothing changed on the first pass, 7024 * therefore this TXG is a no-op. Avoid 7025 * syncing deferred frees, so that we 7026 * can keep this TXG as a no-op. 7027 */ 7028 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, 7029 txg)); 7030 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 7031 ASSERT(txg_list_empty(&dp->dp_sync_tasks, txg)); 7032 break; 7033 } 7034 spa_sync_deferred_frees(spa, tx); 7035 } 7036 7037 } while (dmu_objset_is_dirty(mos, txg)); 7038 7039 if (!list_is_empty(&spa->spa_config_dirty_list)) { 7040 /* 7041 * Make sure that the number of ZAPs for all the vdevs matches 7042 * the number of ZAPs in the per-vdev ZAP list. This only gets 7043 * called if the config is dirty; otherwise there may be 7044 * outstanding AVZ operations that weren't completed in 7045 * spa_sync_config_object. 7046 */ 7047 uint64_t all_vdev_zap_entry_count; 7048 ASSERT0(zap_count(spa->spa_meta_objset, 7049 spa->spa_all_vdev_zaps, &all_vdev_zap_entry_count)); 7050 ASSERT3U(vdev_count_verify_zaps(spa->spa_root_vdev), ==, 7051 all_vdev_zap_entry_count); 7052 } 7053 7054 /* 7055 * Rewrite the vdev configuration (which includes the uberblock) 7056 * to commit the transaction group. 7057 * 7058 * If there are no dirty vdevs, we sync the uberblock to a few 7059 * random top-level vdevs that are known to be visible in the 7060 * config cache (see spa_vdev_add() for a complete description). 7061 * If there *are* dirty vdevs, sync the uberblock to all vdevs. 7062 */ 7063 for (;;) { 7064 /* 7065 * We hold SCL_STATE to prevent vdev open/close/etc. 7066 * while we're attempting to write the vdev labels. 7067 */ 7068 spa_config_enter(spa, SCL_STATE, FTAG, RW_READER); 7069 7070 if (list_is_empty(&spa->spa_config_dirty_list)) { 7071 vdev_t *svd[SPA_DVAS_PER_BP]; 7072 int svdcount = 0; 7073 int children = rvd->vdev_children; 7074 int c0 = spa_get_random(children); 7075 7076 for (int c = 0; c < children; c++) { 7077 vd = rvd->vdev_child[(c0 + c) % children]; 7078 if (vd->vdev_ms_array == 0 || vd->vdev_islog) 7079 continue; 7080 svd[svdcount++] = vd; 7081 if (svdcount == SPA_DVAS_PER_BP) 7082 break; 7083 } 7084 error = vdev_config_sync(svd, svdcount, txg); 7085 } else { 7086 error = vdev_config_sync(rvd->vdev_child, 7087 rvd->vdev_children, txg); 7088 } 7089 7090 if (error == 0) 7091 spa->spa_last_synced_guid = rvd->vdev_guid; 7092 7093 spa_config_exit(spa, SCL_STATE, FTAG); 7094 7095 if (error == 0) 7096 break; 7097 zio_suspend(spa, NULL); 7098 zio_resume_wait(spa); 7099 } 7100 dmu_tx_commit(tx); 7101 7102#ifdef illumos 7103 VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 7104#else /* !illumos */ 7105#ifdef _KERNEL 7106 callout_drain(&spa->spa_deadman_cycid); 7107#endif 7108#endif /* illumos */ 7109 7110 /* 7111 * Clear the dirty config list. 7112 */ 7113 while ((vd = list_head(&spa->spa_config_dirty_list)) != NULL) 7114 vdev_config_clean(vd); 7115 7116 /* 7117 * Now that the new config has synced transactionally, 7118 * let it become visible to the config cache. 7119 */ 7120 if (spa->spa_config_syncing != NULL) { 7121 spa_config_set(spa, spa->spa_config_syncing); 7122 spa->spa_config_txg = txg; 7123 spa->spa_config_syncing = NULL; 7124 } 7125 7126 dsl_pool_sync_done(dp, txg); 7127 7128 mutex_enter(&spa->spa_alloc_lock); 7129 VERIFY0(avl_numnodes(&spa->spa_alloc_tree)); 7130 mutex_exit(&spa->spa_alloc_lock); 7131 7132 /* 7133 * Update usable space statistics. 7134 */ 7135 while (vd = txg_list_remove(&spa->spa_vdev_txg_list, TXG_CLEAN(txg))) 7136 vdev_sync_done(vd, txg); 7137 7138 spa_update_dspace(spa); 7139 7140 /* 7141 * It had better be the case that we didn't dirty anything 7142 * since vdev_config_sync(). 7143 */ 7144 ASSERT(txg_list_empty(&dp->dp_dirty_datasets, txg)); 7145 ASSERT(txg_list_empty(&dp->dp_dirty_dirs, txg)); 7146 ASSERT(txg_list_empty(&spa->spa_vdev_txg_list, txg)); 7147 7148 spa->spa_sync_pass = 0; 7149 7150 /* 7151 * Update the last synced uberblock here. We want to do this at 7152 * the end of spa_sync() so that consumers of spa_last_synced_txg() 7153 * will be guaranteed that all the processing associated with 7154 * that txg has been completed. 7155 */ 7156 spa->spa_ubsync = spa->spa_uberblock; 7157 spa_config_exit(spa, SCL_CONFIG, FTAG); 7158 7159 spa_handle_ignored_writes(spa); 7160 7161 /* 7162 * If any async tasks have been requested, kick them off. 7163 */ 7164 spa_async_dispatch(spa); 7165 spa_async_dispatch_vd(spa); 7166} 7167 7168/* 7169 * Sync all pools. We don't want to hold the namespace lock across these 7170 * operations, so we take a reference on the spa_t and drop the lock during the 7171 * sync. 7172 */ 7173void 7174spa_sync_allpools(void) 7175{ 7176 spa_t *spa = NULL; 7177 mutex_enter(&spa_namespace_lock); 7178 while ((spa = spa_next(spa)) != NULL) { 7179 if (spa_state(spa) != POOL_STATE_ACTIVE || 7180 !spa_writeable(spa) || spa_suspended(spa)) 7181 continue; 7182 spa_open_ref(spa, FTAG); 7183 mutex_exit(&spa_namespace_lock); 7184 txg_wait_synced(spa_get_dsl(spa), 0); 7185 mutex_enter(&spa_namespace_lock); 7186 spa_close(spa, FTAG); 7187 } 7188 mutex_exit(&spa_namespace_lock); 7189} 7190 7191/* 7192 * ========================================================================== 7193 * Miscellaneous routines 7194 * ========================================================================== 7195 */ 7196 7197/* 7198 * Remove all pools in the system. 7199 */ 7200void 7201spa_evict_all(void) 7202{ 7203 spa_t *spa; 7204 7205 /* 7206 * Remove all cached state. All pools should be closed now, 7207 * so every spa in the AVL tree should be unreferenced. 7208 */ 7209 mutex_enter(&spa_namespace_lock); 7210 while ((spa = spa_next(NULL)) != NULL) { 7211 /* 7212 * Stop async tasks. The async thread may need to detach 7213 * a device that's been replaced, which requires grabbing 7214 * spa_namespace_lock, so we must drop it here. 7215 */ 7216 spa_open_ref(spa, FTAG); 7217 mutex_exit(&spa_namespace_lock); 7218 spa_async_suspend(spa); 7219 mutex_enter(&spa_namespace_lock); 7220 spa_close(spa, FTAG); 7221 7222 if (spa->spa_state != POOL_STATE_UNINITIALIZED) { 7223 spa_unload(spa); 7224 spa_deactivate(spa); 7225 } 7226 spa_remove(spa); 7227 } 7228 mutex_exit(&spa_namespace_lock); 7229} 7230 7231vdev_t * 7232spa_lookup_by_guid(spa_t *spa, uint64_t guid, boolean_t aux) 7233{ 7234 vdev_t *vd; 7235 int i; 7236 7237 if ((vd = vdev_lookup_by_guid(spa->spa_root_vdev, guid)) != NULL) 7238 return (vd); 7239 7240 if (aux) { 7241 for (i = 0; i < spa->spa_l2cache.sav_count; i++) { 7242 vd = spa->spa_l2cache.sav_vdevs[i]; 7243 if (vd->vdev_guid == guid) 7244 return (vd); 7245 } 7246 7247 for (i = 0; i < spa->spa_spares.sav_count; i++) { 7248 vd = spa->spa_spares.sav_vdevs[i]; 7249 if (vd->vdev_guid == guid) 7250 return (vd); 7251 } 7252 } 7253 7254 return (NULL); 7255} 7256 7257void 7258spa_upgrade(spa_t *spa, uint64_t version) 7259{ 7260 ASSERT(spa_writeable(spa)); 7261 7262 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 7263 7264 /* 7265 * This should only be called for a non-faulted pool, and since a 7266 * future version would result in an unopenable pool, this shouldn't be 7267 * possible. 7268 */ 7269 ASSERT(SPA_VERSION_IS_SUPPORTED(spa->spa_uberblock.ub_version)); 7270 ASSERT3U(version, >=, spa->spa_uberblock.ub_version); 7271 7272 spa->spa_uberblock.ub_version = version; 7273 vdev_config_dirty(spa->spa_root_vdev); 7274 7275 spa_config_exit(spa, SCL_ALL, FTAG); 7276 7277 txg_wait_synced(spa_get_dsl(spa), 0); 7278} 7279 7280boolean_t 7281spa_has_spare(spa_t *spa, uint64_t guid) 7282{ 7283 int i; 7284 uint64_t spareguid; 7285 spa_aux_vdev_t *sav = &spa->spa_spares; 7286 7287 for (i = 0; i < sav->sav_count; i++) 7288 if (sav->sav_vdevs[i]->vdev_guid == guid) 7289 return (B_TRUE); 7290 7291 for (i = 0; i < sav->sav_npending; i++) { 7292 if (nvlist_lookup_uint64(sav->sav_pending[i], ZPOOL_CONFIG_GUID, 7293 &spareguid) == 0 && spareguid == guid) 7294 return (B_TRUE); 7295 } 7296 7297 return (B_FALSE); 7298} 7299 7300/* 7301 * Check if a pool has an active shared spare device. 7302 * Note: reference count of an active spare is 2, as a spare and as a replace 7303 */ 7304static boolean_t 7305spa_has_active_shared_spare(spa_t *spa) 7306{ 7307 int i, refcnt; 7308 uint64_t pool; 7309 spa_aux_vdev_t *sav = &spa->spa_spares; 7310 7311 for (i = 0; i < sav->sav_count; i++) { 7312 if (spa_spare_exists(sav->sav_vdevs[i]->vdev_guid, &pool, 7313 &refcnt) && pool != 0ULL && pool == spa_guid(spa) && 7314 refcnt > 2) 7315 return (B_TRUE); 7316 } 7317 7318 return (B_FALSE); 7319} 7320 7321static sysevent_t * 7322spa_event_create(spa_t *spa, vdev_t *vd, const char *name) 7323{ 7324 sysevent_t *ev = NULL; 7325#ifdef _KERNEL 7326 sysevent_attr_list_t *attr = NULL; 7327 sysevent_value_t value; 7328 7329 ev = sysevent_alloc(EC_ZFS, (char *)name, SUNW_KERN_PUB "zfs", 7330 SE_SLEEP); 7331 ASSERT(ev != NULL); 7332 7333 value.value_type = SE_DATA_TYPE_STRING; 7334 value.value.sv_string = spa_name(spa); 7335 if (sysevent_add_attr(&attr, ZFS_EV_POOL_NAME, &value, SE_SLEEP) != 0) 7336 goto done; 7337 7338 value.value_type = SE_DATA_TYPE_UINT64; 7339 value.value.sv_uint64 = spa_guid(spa); 7340 if (sysevent_add_attr(&attr, ZFS_EV_POOL_GUID, &value, SE_SLEEP) != 0) 7341 goto done; 7342 7343 if (vd) { 7344 value.value_type = SE_DATA_TYPE_UINT64; 7345 value.value.sv_uint64 = vd->vdev_guid; 7346 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_GUID, &value, 7347 SE_SLEEP) != 0) 7348 goto done; 7349 7350 if (vd->vdev_path) { 7351 value.value_type = SE_DATA_TYPE_STRING; 7352 value.value.sv_string = vd->vdev_path; 7353 if (sysevent_add_attr(&attr, ZFS_EV_VDEV_PATH, 7354 &value, SE_SLEEP) != 0) 7355 goto done; 7356 } 7357 } 7358 7359 if (sysevent_attach_attributes(ev, attr) != 0) 7360 goto done; 7361 attr = NULL; 7362 7363done: 7364 if (attr) 7365 sysevent_free_attr(attr); 7366 7367#endif 7368 return (ev); 7369} 7370 7371static void 7372spa_event_post(sysevent_t *ev) 7373{ 7374#ifdef _KERNEL 7375 sysevent_id_t eid; 7376 7377 (void) log_sysevent(ev, SE_SLEEP, &eid); 7378 sysevent_free(ev); 7379#endif 7380} 7381 7382/* 7383 * Post a sysevent corresponding to the given event. The 'name' must be one of 7384 * the event definitions in sys/sysevent/eventdefs.h. The payload will be 7385 * filled in from the spa and (optionally) the vdev. This doesn't do anything 7386 * in the userland libzpool, as we don't want consumers to misinterpret ztest 7387 * or zdb as real changes. 7388 */ 7389void 7390spa_event_notify(spa_t *spa, vdev_t *vd, const char *name) 7391{ 7392 spa_event_post(spa_event_create(spa, vd, name)); 7393} 7394